Vladimir Serbinenko (phcoder@gmail.com) just uploaded a new patch set to gerrit, which you can find at http://review.coreboot.org/5254
-gerrit
commit 95dda186ed9f463e8545f0ffd32769a0219e1db3 Author: Vladimir Serbinenko phcoder@gmail.com Date: Sun Feb 16 17:13:19 2014 +0100
bd82x6x, ibexpeak, lynxpoint: Unify SPI.
SPI registers didnt change since ICH8. No need to have separate files for them. Unify.
Change-Id: I4e2ac3221b419c007e135c9ee615fc3b84424cbc Signed-off-by: Vladimir Serbinenko phcoder@gmail.com --- src/southbridge/intel/bd82x6x/Makefile.inc | 4 +- src/southbridge/intel/bd82x6x/spi.c | 1066 ----------------------- src/southbridge/intel/common/spi.c | 986 ++++++++++++++++++++++ src/southbridge/intel/fsp_bd82x6x/Makefile.inc | 4 +- src/southbridge/intel/fsp_bd82x6x/spi.c | 751 ----------------- src/southbridge/intel/ibexpeak/Makefile.inc | 4 +- src/southbridge/intel/ibexpeak/spi.c | 1067 ------------------------ src/southbridge/intel/lynxpoint/Makefile.inc | 4 +- src/southbridge/intel/lynxpoint/spi.c | 657 --------------- 9 files changed, 994 insertions(+), 3549 deletions(-)
diff --git a/src/southbridge/intel/bd82x6x/Makefile.inc b/src/southbridge/intel/bd82x6x/Makefile.inc index 8abc56a..16a53cc 100644 --- a/src/southbridge/intel/bd82x6x/Makefile.inc +++ b/src/southbridge/intel/bd82x6x/Makefile.inc @@ -39,8 +39,8 @@ ramstage-y += reset.c ramstage-y += watchdog.c
ramstage-$(CONFIG_ELOG) += elog.c -ramstage-y += spi.c -smm-$(CONFIG_SPI_FLASH_SMM) += spi.c +ramstage-y += ../spi.c +smm-$(CONFIG_SPI_FLASH_SMM) += ../spi.c
ramstage-$(CONFIG_HAVE_SMI_HANDLER) += smi.c smm-$(CONFIG_HAVE_SMI_HANDLER) += smihandler.c me.c me_8.x.c finalize.c pch.c diff --git a/src/southbridge/intel/bd82x6x/spi.c b/src/southbridge/intel/bd82x6x/spi.c deleted file mode 100644 index 1f2511e..0000000 --- a/src/southbridge/intel/bd82x6x/spi.c +++ /dev/null @@ -1,1066 +0,0 @@ -/* - * Copyright (c) 2011 The Chromium OS Authors. - * Copyright (C) 2009, 2010 Carl-Daniel Hailfinger - * Copyright (C) 2011 Stefan Tauner - * - * See file CREDITS for list of people who contributed to this - * project. - * - * This program is free software; you can redistribute it and/or - * modify it under the terms of the GNU General Public License as - * published by the Free Software Foundation; either version 2 of - * the License, or (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but without any warranty; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 59 Temple Place, Suite 330, Boston, - * MA 02111-1307 USA - */ - -/* This file is derived from the flashrom project. */ -#include <stdint.h> -#include <stdlib.h> -#include <string.h> -#include <delay.h> -#include <arch/io.h> -#include <console/console.h> -#include <device/pci_ids.h> -#include <device/pci.h> -#include <spi_flash.h> - -#include <spi-generic.h> -#include "pch.h" - -#define min(a, b) ((a)<(b)?(a):(b)) - -#define HSFC_FCYCLE_OFF 1 /* 1-2: FLASH Cycle */ -#define HSFC_FCYCLE (0x3 << HSFC_FCYCLE_OFF) -#define HSFC_FDBC_OFF 8 /* 8-13: Flash Data Byte Count */ -#define HSFC_FDBC (0x3f << HSFC_FDBC_OFF) - - -#ifdef __SMM__ -#include <arch/pci_mmio_cfg.h> -#define pci_read_config_byte(dev, reg, targ)\ - *(targ) = pci_read_config8(dev, reg) -#define pci_read_config_word(dev, reg, targ)\ - *(targ) = pci_read_config16(dev, reg) -#define pci_read_config_dword(dev, reg, targ)\ - *(targ) = pci_read_config32(dev, reg) -#define pci_write_config_byte(dev, reg, val)\ - pci_write_config8(dev, reg, val) -#define pci_write_config_word(dev, reg, val)\ - pci_write_config16(dev, reg, val) -#define pci_write_config_dword(dev, reg, val)\ - pci_write_config32(dev, reg, val) -#else /* !__SMM__ */ -#include <device/device.h> -#include <device/pci.h> -#define pci_read_config_byte(dev, reg, targ)\ - *(targ) = pci_read_config8(dev, reg) -#define pci_read_config_word(dev, reg, targ)\ - *(targ) = pci_read_config16(dev, reg) -#define pci_read_config_dword(dev, reg, targ)\ - *(targ) = pci_read_config32(dev, reg) -#define pci_write_config_byte(dev, reg, val)\ - pci_write_config8(dev, reg, val) -#define pci_write_config_word(dev, reg, val)\ - pci_write_config16(dev, reg, val) -#define pci_write_config_dword(dev, reg, val)\ - pci_write_config32(dev, reg, val) -#endif /* !__SMM__ */ - -static int spi_is_multichip(void); -static struct spi_flash *spi_flash_hwseq(struct spi_slave *spi); - -typedef struct spi_slave ich_spi_slave; - -static int ichspi_lock = 0; - -typedef struct ich7_spi_regs { - uint16_t spis; - uint16_t spic; - uint32_t spia; - uint64_t spid[8]; - uint64_t _pad; - uint32_t bbar; - uint16_t preop; - uint16_t optype; - uint8_t opmenu[8]; -} __attribute__((packed)) ich7_spi_regs; - -typedef struct ich9_spi_regs { - uint32_t bfpr; - uint16_t hsfs; - uint16_t hsfc; - uint32_t faddr; - uint32_t _reserved0; - uint32_t fdata[16]; - uint32_t frap; - uint32_t freg[5]; - uint32_t _reserved1[3]; - uint32_t pr[5]; - uint32_t _reserved2[2]; - uint8_t ssfs; - uint8_t ssfc[3]; - uint16_t preop; - uint16_t optype; - uint8_t opmenu[8]; - uint32_t bbar; - uint8_t _reserved3[12]; - uint32_t fdoc; - uint32_t fdod; - uint8_t _reserved4[8]; - uint32_t afc; - uint32_t lvscc; - uint32_t uvscc; - uint8_t _reserved5[4]; - uint32_t fpb; - uint8_t _reserved6[28]; - uint32_t srdl; - uint32_t srdc; - uint32_t srd; -} __attribute__((packed)) ich9_spi_regs; - -typedef struct ich_spi_controller { - int locked; - int revision; - uint32_t flmap0; - uint32_t hsfs; - - ich9_spi_regs *ich9_spi; - uint8_t *opmenu; - int menubytes; - uint16_t *preop; - uint16_t *optype; - uint32_t *addr; - uint8_t *data; - unsigned databytes; - uint8_t *status; - uint16_t *control; - uint32_t *bbar; -} ich_spi_controller; - -static ich_spi_controller cntlr; - -enum { - SPIS_SCIP = 0x0001, - SPIS_GRANT = 0x0002, - SPIS_CDS = 0x0004, - SPIS_FCERR = 0x0008, - SSFS_AEL = 0x0010, - SPIS_LOCK = 0x8000, - SPIS_RESERVED_MASK = 0x7ff0, - SSFS_RESERVED_MASK = 0x7fe2 -}; - -enum { - SPIC_SCGO = 0x000002, - SPIC_ACS = 0x000004, - SPIC_SPOP = 0x000008, - SPIC_DBC = 0x003f00, - SPIC_DS = 0x004000, - SPIC_SME = 0x008000, - SSFC_SCF_MASK = 0x070000, - SSFC_RESERVED = 0xf80000 -}; - -enum { - HSFS_FDONE = 0x0001, - HSFS_FCERR = 0x0002, - HSFS_AEL = 0x0004, - HSFS_BERASE_MASK = 0x0018, - HSFS_BERASE_SHIFT = 3, - HSFS_SCIP = 0x0020, - HSFS_FDOPSS = 0x2000, - HSFS_FDV = 0x4000, - HSFS_FLOCKDN = 0x8000 -}; - -enum { - HSFC_FGO = 0x0001, - HSFC_FCYCLE_MASK = 0x0006, - HSFC_FCYCLE_SHIFT = 1, - HSFC_FDBC_MASK = 0x3f00, - HSFC_FDBC_SHIFT = 8, - HSFC_FSMIE = 0x8000 -}; - -enum { - SPI_OPCODE_TYPE_READ_NO_ADDRESS = 0, - SPI_OPCODE_TYPE_WRITE_NO_ADDRESS = 1, - SPI_OPCODE_TYPE_READ_WITH_ADDRESS = 2, - SPI_OPCODE_TYPE_WRITE_WITH_ADDRESS = 3 -}; - -#if CONFIG_DEBUG_SPI_FLASH - -static u8 readb_(const void *addr) -{ - u8 v = read8((unsigned long)addr); - printk(BIOS_DEBUG, "read %2.2x from %4.4x\n", - v, ((unsigned) addr & 0xffff) - 0xf020); - return v; -} - -static u16 readw_(const void *addr) -{ - u16 v = read16((unsigned long)addr); - printk(BIOS_DEBUG, "read %4.4x from %4.4x\n", - v, ((unsigned) addr & 0xffff) - 0xf020); - return v; -} - -static u32 readl_(const void *addr) -{ - u32 v = read32((unsigned long)addr); - printk(BIOS_DEBUG, "read %8.8x from %4.4x\n", - v, ((unsigned) addr & 0xffff) - 0xf020); - return v; -} - -static void writeb_(u8 b, const void *addr) -{ - write8((unsigned long)addr, b); - printk(BIOS_DEBUG, "wrote %2.2x to %4.4x\n", - b, ((unsigned) addr & 0xffff) - 0xf020); -} - -static void writew_(u16 b, const void *addr) -{ - write16((unsigned long)addr, b); - printk(BIOS_DEBUG, "wrote %4.4x to %4.4x\n", - b, ((unsigned) addr & 0xffff) - 0xf020); -} - -static void writel_(u32 b, const void *addr) -{ - write32((unsigned long)addr, b); - printk(BIOS_DEBUG, "wrote %8.8x to %4.4x\n", - b, ((unsigned) addr & 0xffff) - 0xf020); -} - -#else /* CONFIG_DEBUG_SPI_FLASH ^^^ enabled vvv NOT enabled */ - -#define readb_(a) read8((uint32_t)a) -#define readw_(a) read16((uint32_t)a) -#define readl_(a) read32((uint32_t)a) -#define writeb_(val, addr) write8((uint32_t)addr, val) -#define writew_(val, addr) write16((uint32_t)addr, val) -#define writel_(val, addr) write32((uint32_t)addr, val) - -#endif /* CONFIG_DEBUG_SPI_FLASH ^^^ NOT enabled */ - -static void write_reg(const void *value, void *dest, uint32_t size) -{ - const uint8_t *bvalue = value; - uint8_t *bdest = dest; - - while (size >= 4) { - writel_(*(const uint32_t *)bvalue, bdest); - bdest += 4; bvalue += 4; size -= 4; - } - while (size) { - writeb_(*bvalue, bdest); - bdest++; bvalue++; size--; - } -} - -static void read_reg(const void *src, void *value, uint32_t size) -{ - const uint8_t *bsrc = src; - uint8_t *bvalue = value; - - while (size >= 4) { - *(uint32_t *)bvalue = readl_(bsrc); - bsrc += 4; bvalue += 4; size -= 4; - } - while (size) { - *bvalue = readb_(bsrc); - bsrc++; bvalue++; size--; - } -} - -static void ich_set_bbar(uint32_t minaddr) -{ - const uint32_t bbar_mask = 0x00ffff00; - uint32_t ichspi_bbar; - - minaddr &= bbar_mask; - ichspi_bbar = readl_(cntlr.bbar) & ~bbar_mask; - ichspi_bbar |= minaddr; - writel_(ichspi_bbar, cntlr.bbar); -} - -int spi_cs_is_valid(unsigned int bus, unsigned int cs) -{ - printk(BIOS_DEBUG, "spi_cs_is_valid used but not implemented\n"); - return 0; -} - -struct spi_slave *spi_setup_slave(unsigned int bus, unsigned int cs, - unsigned int max_hz, unsigned int mode) -{ - ich_spi_slave *slave = malloc(sizeof(*slave)); - - if (!slave) { - printk(BIOS_DEBUG, "ICH SPI: Bad allocation\n"); - return NULL; - } - - memset(slave, 0, sizeof(*slave)); - - slave->bus = bus; - slave->cs = cs; - if (cntlr.revision == 9) { - slave->force_programmer_specific = spi_is_multichip (); - slave->programmer_specific_probe = spi_flash_hwseq; - } - return slave; -} - -/* - * Check if this device ID matches one of supported Intel PCH devices. - * - * Return the ICH version if there is a match, or zero otherwise. - */ -static inline int get_ich_version(uint16_t device_id) -{ - if (device_id == PCI_DEVICE_ID_INTEL_TGP_LPC) - return 7; - - if ((device_id >= PCI_DEVICE_ID_INTEL_COUGARPOINT_LPC_MIN && - device_id <= PCI_DEVICE_ID_INTEL_COUGARPOINT_LPC_MAX) || - (device_id >= PCI_DEVICE_ID_INTEL_PANTHERPOINT_LPC_MIN && - device_id <= PCI_DEVICE_ID_INTEL_PANTHERPOINT_LPC_MAX)) - return 9; - - return 0; -} - -void spi_init(void) -{ - int ich_version = 0; - - uint8_t *rcrb; /* Root Complex Register Block */ - uint32_t rcba; /* Root Complex Base Address */ - uint8_t bios_cntl; - device_t dev; - uint32_t ids; - uint16_t vendor_id, device_id; - -#ifdef __SMM__ - dev = PCI_DEV(0, 31, 0); -#else - dev = dev_find_slot(0, PCI_DEVFN(31, 0)); -#endif - pci_read_config_dword(dev, 0, &ids); - vendor_id = ids; - device_id = (ids >> 16); - - if (vendor_id != PCI_VENDOR_ID_INTEL) { - printk(BIOS_DEBUG, "ICH SPI: No ICH found.\n"); - return; - } - - ich_version = get_ich_version(device_id); - - if (!ich_version) { - printk(BIOS_DEBUG, "ICH SPI: No known ICH found.\n"); - return; - } - - pci_read_config_dword(dev, 0xf0, &rcba); - /* Bits 31-14 are the base address, 13-1 are reserved, 0 is enable. */ - rcrb = (uint8_t *)(rcba & 0xffffc000); - cntlr.revision = ich_version; - switch (ich_version) { - case 7: - { - const uint16_t ich7_spibar_offset = 0x3020; - ich7_spi_regs *ich7_spi = - (ich7_spi_regs *)(rcrb + ich7_spibar_offset); - - ichspi_lock = readw_(&ich7_spi->spis) & SPIS_LOCK; - cntlr.opmenu = ich7_spi->opmenu; - cntlr.menubytes = sizeof(ich7_spi->opmenu); - cntlr.optype = &ich7_spi->optype; - cntlr.addr = &ich7_spi->spia; - cntlr.data = (uint8_t *)ich7_spi->spid; - cntlr.databytes = sizeof(ich7_spi->spid); - cntlr.status = (uint8_t *)&ich7_spi->spis; - cntlr.control = &ich7_spi->spic; - cntlr.bbar = &ich7_spi->bbar; - cntlr.preop = &ich7_spi->preop; - break; - } - case 9: - { - const uint16_t ich9_spibar_offset = 0x3800; - ich9_spi_regs *ich9_spi = - (ich9_spi_regs *)(rcrb + ich9_spibar_offset); - uint16_t hsfs; - cntlr.ich9_spi = ich9_spi; - hsfs = readw_(&ich9_spi->hsfs); - ichspi_lock = hsfs & HSFS_FLOCKDN; - cntlr.hsfs = hsfs; - cntlr.opmenu = ich9_spi->opmenu; - cntlr.menubytes = sizeof(ich9_spi->opmenu); - cntlr.optype = &ich9_spi->optype; - cntlr.addr = &ich9_spi->faddr; - cntlr.data = (uint8_t *)ich9_spi->fdata; - cntlr.databytes = sizeof(ich9_spi->fdata); - cntlr.status = &ich9_spi->ssfs; - cntlr.control = (uint16_t *)ich9_spi->ssfc; - cntlr.bbar = &ich9_spi->bbar; - cntlr.preop = &ich9_spi->preop; - - if (cntlr.hsfs & HSFS_FDV) - { - writel_ (4, &ich9_spi->fdoc); - cntlr.flmap0 = readl_(&ich9_spi->fdod); - } - break; - } - default: - printk(BIOS_DEBUG, "ICH SPI: Unrecognized ICH version %d.\n", ich_version); - } - - ich_set_bbar(0); - - /* Disable the BIOS write protect so write commands are allowed. */ - pci_read_config_byte(dev, 0xdc, &bios_cntl); - switch (ich_version) { - case 9: - /* Deassert SMM BIOS Write Protect Disable. */ - bios_cntl &= ~(1 << 5); - break; - - default: - break; - } - pci_write_config_byte(dev, 0xdc, bios_cntl | 0x1); -} - -int spi_claim_bus(struct spi_slave *slave) -{ - /* Handled by ICH automatically. */ - return 0; -} - -void spi_release_bus(struct spi_slave *slave) -{ - /* Handled by ICH automatically. */ -} - -void spi_cs_activate(struct spi_slave *slave) -{ - /* Handled by ICH automatically. */ -} - -void spi_cs_deactivate(struct spi_slave *slave) -{ - /* Handled by ICH automatically. */ -} - -typedef struct spi_transaction { - const uint8_t *out; - uint32_t bytesout; - uint8_t *in; - uint32_t bytesin; - uint8_t type; - uint8_t opcode; - uint32_t offset; -} spi_transaction; - -static inline void spi_use_out(spi_transaction *trans, unsigned bytes) -{ - trans->out += bytes; - trans->bytesout -= bytes; -} - -static inline void spi_use_in(spi_transaction *trans, unsigned bytes) -{ - trans->in += bytes; - trans->bytesin -= bytes; -} - -static void spi_setup_type(spi_transaction *trans) -{ - trans->type = 0xFF; - - /* Try to guess spi type from read/write sizes. */ - if (trans->bytesin == 0) { - if (trans->bytesout > 4) - /* - * If bytesin = 0 and bytesout > 4, we presume this is - * a write data operation, which is accompanied by an - * address. - */ - trans->type = SPI_OPCODE_TYPE_WRITE_WITH_ADDRESS; - else - trans->type = SPI_OPCODE_TYPE_WRITE_NO_ADDRESS; - return; - } - - if (trans->bytesout == 1) { /* and bytesin is > 0 */ - trans->type = SPI_OPCODE_TYPE_READ_NO_ADDRESS; - return; - } - - if (trans->bytesout == 4) { /* and bytesin is > 0 */ - trans->type = SPI_OPCODE_TYPE_READ_WITH_ADDRESS; - } - - /* Fast read command is called with 5 bytes instead of 4 */ - if (trans->out[0] == SPI_OPCODE_FAST_READ && trans->bytesout == 5) { - trans->type = SPI_OPCODE_TYPE_READ_WITH_ADDRESS; - --trans->bytesout; - } -} - -static int spi_setup_opcode(spi_transaction *trans) -{ - uint16_t optypes; - uint8_t opmenu[cntlr.menubytes]; - - trans->opcode = trans->out[0]; - spi_use_out(trans, 1); - if (!ichspi_lock) { - /* The lock is off, so just use index 0. */ - writeb_(trans->opcode, cntlr.opmenu); - optypes = readw_(cntlr.optype); - optypes = (optypes & 0xfffc) | (trans->type & 0x3); - writew_(optypes, cntlr.optype); - return 0; - } else { - /* The lock is on. See if what we need is on the menu. */ - uint8_t optype; - uint16_t opcode_index; - - /* Write Enable is handled as atomic prefix */ - if (trans->opcode == SPI_OPCODE_WREN) - return 0; - - read_reg(cntlr.opmenu, opmenu, sizeof(opmenu)); - for (opcode_index = 0; opcode_index < cntlr.menubytes; - opcode_index++) { - if (opmenu[opcode_index] == trans->opcode) - break; - } - - if (opcode_index == cntlr.menubytes) { - printk(BIOS_DEBUG, "ICH SPI: Opcode %x not found\n", - trans->opcode); - return -1; - } - - optypes = readw_(cntlr.optype); - optype = (optypes >> (opcode_index * 2)) & 0x3; - if (trans->type == SPI_OPCODE_TYPE_WRITE_NO_ADDRESS && - optype == SPI_OPCODE_TYPE_WRITE_WITH_ADDRESS && - trans->bytesout >= 3) { - /* We guessed wrong earlier. Fix it up. */ - trans->type = optype; - } - if (optype != trans->type) { - printk(BIOS_DEBUG, "ICH SPI: Transaction doesn't fit type %d\n", - optype); - return -1; - } - return opcode_index; - } -} - -static int spi_setup_offset(spi_transaction *trans) -{ - /* Separate the SPI address and data. */ - switch (trans->type) { - case SPI_OPCODE_TYPE_READ_NO_ADDRESS: - case SPI_OPCODE_TYPE_WRITE_NO_ADDRESS: - return 0; - case SPI_OPCODE_TYPE_READ_WITH_ADDRESS: - case SPI_OPCODE_TYPE_WRITE_WITH_ADDRESS: - trans->offset = ((uint32_t)trans->out[0] << 16) | - ((uint32_t)trans->out[1] << 8) | - ((uint32_t)trans->out[2] << 0); - spi_use_out(trans, 3); - return 1; - default: - printk(BIOS_DEBUG, "Unrecognized SPI transaction type %#x\n", trans->type); - return -1; - } -} - -/* - * Wait for up to 60ms til status register bit(s) turn 1 (in case wait_til_set - * below is True) or 0. In case the wait was for the bit(s) to set - write - * those bits back, which would cause resetting them. - * - * Return the last read status value on success or -1 on failure. - */ -static int ich_status_poll(u16 bitmask, int wait_til_set) -{ - int timeout = 6000; /* This will result in 60 ms */ - u16 status = 0; - - while (timeout--) { - status = readw_(cntlr.status); - if (wait_til_set ^ ((status & bitmask) == 0)) { - if (wait_til_set) - writew_((status & bitmask), cntlr.status); - return status; - } - udelay(10); - } - - printk(BIOS_DEBUG, "ICH SPI: SCIP timeout, read %x, expected %x\n", - status, bitmask); - return -1; -} - -static int spi_is_multichip (void) -{ - if (cntlr.revision != 9) - return 0; - if (!(cntlr.hsfs & HSFS_FDV)) - return 0; - return !!((cntlr.flmap0 >> 8) & 3); -} - -int spi_xfer(struct spi_slave *slave, const void *dout, - unsigned int bitsout, void *din, unsigned int bitsin) -{ - uint16_t control; - int16_t opcode_index; - int with_address; - int status; - - spi_transaction trans = { - dout, bitsout / 8, - din, bitsin / 8, - 0xff, 0xff, 0 - }; - - /* There has to always at least be an opcode. */ - if (!bitsout || !dout) { - printk(BIOS_DEBUG, "ICH SPI: No opcode for transfer\n"); - return -1; - } - /* Make sure if we read something we have a place to put it. */ - if (bitsin != 0 && !din) { - printk(BIOS_DEBUG, "ICH SPI: Read but no target buffer\n"); - return -1; - } - /* Right now we don't support writing partial bytes. */ - if (bitsout % 8 || bitsin % 8) { - printk(BIOS_DEBUG, "ICH SPI: Accessing partial bytes not supported\n"); - return -1; - } - - if (ich_status_poll(SPIS_SCIP, 0) == -1) - return -1; - - writew_(SPIS_CDS | SPIS_FCERR, cntlr.status); - - spi_setup_type(&trans); - if ((opcode_index = spi_setup_opcode(&trans)) < 0) - return -1; - if ((with_address = spi_setup_offset(&trans)) < 0) - return -1; - - if (trans.opcode == SPI_OPCODE_WREN) { - /* - * Treat Write Enable as Atomic Pre-Op if possible - * in order to prevent the Management Engine from - * issuing a transaction between WREN and DATA. - */ - if (!ichspi_lock) - writew_(trans.opcode, cntlr.preop); - return 0; - } - - /* Preset control fields */ - control = SPIC_SCGO | ((opcode_index & 0x07) << 4); - - /* Issue atomic preop cycle if needed */ - if (readw_(cntlr.preop)) - control |= SPIC_ACS; - - if (!trans.bytesout && !trans.bytesin) { - /* SPI addresses are 24 bit only */ - if (with_address) - writel_(trans.offset & 0x00FFFFFF, cntlr.addr); - - /* - * This is a 'no data' command (like Write Enable), its - * bitesout size was 1, decremented to zero while executing - * spi_setup_opcode() above. Tell the chip to send the - * command. - */ - writew_(control, cntlr.control); - - /* wait for the result */ - status = ich_status_poll(SPIS_CDS | SPIS_FCERR, 1); - if (status == -1) - return -1; - - if (status & SPIS_FCERR) { - printk(BIOS_DEBUG, "ICH SPI: Command transaction error\n"); - return -1; - } - - return 0; - } - - /* - * Check if this is a write command attempting to transfer more bytes - * than the controller can handle. Iterations for writes are not - * supported here because each SPI write command needs to be preceded - * and followed by other SPI commands, and this sequence is controlled - * by the SPI chip driver. - */ - if (trans.bytesout > cntlr.databytes) { - printk(BIOS_DEBUG, "ICH SPI: Too much to write. Does your SPI chip driver use" - " CONTROLLER_PAGE_LIMIT?\n"); - return -1; - } - - /* - * Read or write up to databytes bytes at a time until everything has - * been sent. - */ - while (trans.bytesout || trans.bytesin) { - uint32_t data_length; - - /* SPI addresses are 24 bit only */ - writel_(trans.offset & 0x00FFFFFF, cntlr.addr); - - if (trans.bytesout) - data_length = min(trans.bytesout, cntlr.databytes); - else - data_length = min(trans.bytesin, cntlr.databytes); - - /* Program data into FDATA0 to N */ - if (trans.bytesout) { - write_reg(trans.out, cntlr.data, data_length); - spi_use_out(&trans, data_length); - if (with_address) - trans.offset += data_length; - } - - /* Add proper control fields' values */ - control &= ~((cntlr.databytes - 1) << 8); - control |= SPIC_DS; - control |= (data_length - 1) << 8; - - /* write it */ - writew_(control, cntlr.control); - - /* Wait for Cycle Done Status or Flash Cycle Error. */ - status = ich_status_poll(SPIS_CDS | SPIS_FCERR, 1); - if (status == -1) - return -1; - - if (status & SPIS_FCERR) { - printk(BIOS_DEBUG, "ICH SPI: Data transaction error\n"); - return -1; - } - - if (trans.bytesin) { - read_reg(cntlr.data, trans.in, data_length); - spi_use_in(&trans, data_length); - if (with_address) - trans.offset += data_length; - } - } - - /* Clear atomic preop now that xfer is done */ - writew_(0, cntlr.preop); - - return 0; -} - -/* Sets FLA in FADDR to (addr & 0x01FFFFFF) without touching other bits. */ -static void ich_hwseq_set_addr(uint32_t addr) -{ - uint32_t addr_old = readl_(&cntlr.ich9_spi->faddr) & ~0x01FFFFFF; - writel_((addr & 0x01FFFFFF) | addr_old, &cntlr.ich9_spi->faddr); -} - -/* Polls for Cycle Done Status, Flash Cycle Error or timeout in 8 us intervals. - Resets all error flags in HSFS. - Returns 0 if the cycle completes successfully without errors within - timeout us, 1 on errors. */ -static int ich_hwseq_wait_for_cycle_complete(unsigned int timeout, - unsigned int len) -{ - uint16_t hsfs; - uint32_t addr; - - timeout /= 8; /* scale timeout duration to counter */ - while ((((hsfs = readw_(&cntlr.ich9_spi->hsfs)) & - (HSFS_FDONE | HSFS_FCERR)) == 0) && - --timeout) { - udelay(8); - } - writew_(readw_(&cntlr.ich9_spi->hsfs), &cntlr.ich9_spi->hsfs); - - if (!timeout) { - uint16_t hsfc; - addr = readl_(&cntlr.ich9_spi->faddr) & 0x01FFFFFF; - hsfc = readw_(&cntlr.ich9_spi->hsfc); - printk(BIOS_ERR, "Transaction timeout between offset 0x%08x and " - "0x%08x (= 0x%08x + %d) HSFC=%x HSFS=%x!\n", - addr, addr + len - 1, addr, len - 1, - hsfc, hsfs); - return 1; - } - - if (hsfs & HSFS_FCERR) { - uint16_t hsfc; - addr = readl_(&cntlr.ich9_spi->faddr) & 0x01FFFFFF; - hsfc = readw_(&cntlr.ich9_spi->hsfc); - printk(BIOS_ERR, "Transaction error between offset 0x%08x and " - "0x%08x (= 0x%08x + %d) HSFC=%x HSFS=%x!\n", - addr, addr + len - 1, addr, len - 1, - hsfc, hsfs); - return 1; - } - return 0; -} - - -static int ich_hwseq_erase(struct spi_flash *flash, u32 offset, size_t len) -{ - u32 start, end, erase_size; - int ret; - uint16_t hsfc; - uint16_t timeout = 1000 * 60; - - erase_size = flash->sector_size; - if (offset % erase_size || len % erase_size) { - printk(BIOS_ERR, "SF: Erase offset/length not multiple of erase size\n"); - return -1; - } - - flash->spi->rw = SPI_WRITE_FLAG; - ret = spi_claim_bus(flash->spi); - if (ret) { - printk(BIOS_ERR, "SF: Unable to claim SPI bus\n"); - return ret; - } - - start = offset; - end = start + len; - - while (offset < end) { - /* make sure FDONE, FCERR, AEL are cleared by writing 1 to them */ - writew_(readw_(&cntlr.ich9_spi->hsfs), &cntlr.ich9_spi->hsfs); - - ich_hwseq_set_addr(offset); - - offset += erase_size; - - hsfc = readw_(&cntlr.ich9_spi->hsfc); - hsfc &= ~HSFC_FCYCLE; /* clear operation */ - hsfc |= (0x3 << HSFC_FCYCLE_OFF); /* set erase operation */ - hsfc |= HSFC_FGO; /* start */ - writew_(hsfc, &cntlr.ich9_spi->hsfc); - if (ich_hwseq_wait_for_cycle_complete(timeout, len)) - { - printk(BIOS_ERR, "SF: Erase failed at %x\n", offset - erase_size); - ret = -1; - goto out; - } - } - - printk(BIOS_DEBUG, "SF: Successfully erased %zu bytes @ %#x\n", len, start); - -out: - spi_release_bus(flash->spi); - return ret; -} - -static void ich_read_data(uint8_t *data, int len) -{ - int i; - uint32_t temp32 = 0; - - for (i = 0; i < len; i++) { - if ((i % 4) == 0) - temp32 = readl_(cntlr.data + i); - - data[i] = (temp32 >> ((i % 4) * 8)) & 0xff; - } -} - -static int ich_hwseq_read(struct spi_flash *flash, - u32 addr, size_t len, void *buf) -{ - uint16_t hsfc; - uint16_t timeout = 100 * 60; - uint8_t block_len; - - if (addr + len > flash->size) { - printk (BIOS_ERR, - "Attempt to read %x-%x which is out of chip\n", - (unsigned) addr, - (unsigned) addr+(unsigned) len); - return -1; - } - - /* clear FDONE, FCERR, AEL by writing 1 to them (if they are set) */ - writew_(readw_(&cntlr.ich9_spi->hsfs), &cntlr.ich9_spi->hsfs); - - while (len > 0) { - block_len = min(len, cntlr.databytes); - if (block_len > (~addr & 0xff)) - block_len = (~addr & 0xff) + 1; - ich_hwseq_set_addr(addr); - hsfc = readw_(&cntlr.ich9_spi->hsfc); - hsfc &= ~HSFC_FCYCLE; /* set read operation */ - hsfc &= ~HSFC_FDBC; /* clear byte count */ - /* set byte count */ - hsfc |= (((block_len - 1) << HSFC_FDBC_OFF) & HSFC_FDBC); - hsfc |= HSFC_FGO; /* start */ - writew_(hsfc, &cntlr.ich9_spi->hsfc); - - if (ich_hwseq_wait_for_cycle_complete(timeout, block_len)) - return 1; - ich_read_data(buf, block_len); - addr += block_len; - buf += block_len; - len -= block_len; - } - return 0; -} - -/* Fill len bytes from the data array into the fdata/spid registers. - * - * Note that using len > flash->pgm->spi.max_data_write will trash the registers - * following the data registers. - */ -static void ich_fill_data(const uint8_t *data, int len) -{ - uint32_t temp32 = 0; - int i; - - if (len <= 0) - return; - - for (i = 0; i < len; i++) { - if ((i % 4) == 0) - temp32 = 0; - - temp32 |= ((uint32_t) data[i]) << ((i % 4) * 8); - - if ((i % 4) == 3) /* 32 bits are full, write them to regs. */ - writel_(temp32, cntlr.data + (i - (i % 4))); - } - i--; - if ((i % 4) != 3) /* Write remaining data to regs. */ - writel_(temp32, cntlr.data + (i - (i % 4))); -} - -static int ich_hwseq_write(struct spi_flash *flash, - u32 addr, size_t len, const void *buf) -{ - uint16_t hsfc; - uint16_t timeout = 100 * 60; - uint8_t block_len; - uint32_t start = addr; - - if (addr + len > flash->size) { - printk (BIOS_ERR, - "Attempt to write 0x%x-0x%x which is out of chip\n", - (unsigned)addr, (unsigned) (addr+len)); - return -1; - } - - /* clear FDONE, FCERR, AEL by writing 1 to them (if they are set) */ - writew_(readw_(&cntlr.ich9_spi->hsfs), &cntlr.ich9_spi->hsfs); - - while (len > 0) { - block_len = min(len, cntlr.databytes); - if (block_len > (~addr & 0xff)) - block_len = (~addr & 0xff) + 1; - - ich_hwseq_set_addr(addr); - - ich_fill_data(buf, block_len); - hsfc = readw_(&cntlr.ich9_spi->hsfc); - hsfc &= ~HSFC_FCYCLE; /* clear operation */ - hsfc |= (0x2 << HSFC_FCYCLE_OFF); /* set write operation */ - hsfc &= ~HSFC_FDBC; /* clear byte count */ - /* set byte count */ - hsfc |= (((block_len - 1) << HSFC_FDBC_OFF) & HSFC_FDBC); - hsfc |= HSFC_FGO; /* start */ - writew_(hsfc, &cntlr.ich9_spi->hsfc); - - if (ich_hwseq_wait_for_cycle_complete(timeout, block_len)) - { - printk (BIOS_ERR, "SF: write failure at %x\n", - addr); - return -1; - } - addr += block_len; - buf += block_len; - len -= block_len; - } - printk(BIOS_DEBUG, "SF: Successfully written %u bytes @ %#x\n", - (unsigned) (addr - start), start); - return 0; -} - - -static struct spi_flash *spi_flash_hwseq(struct spi_slave *spi) -{ - struct spi_flash *flash = NULL; - uint32_t flcomp; - - flash = malloc(sizeof(*flash)); - if (!flash) { - printk(BIOS_WARNING, "SF: Failed to allocate memory\n"); - return NULL; - } - - flash->spi = spi; - flash->name = "Opaque HW-sequencing"; - - flash->write = ich_hwseq_write; - flash->erase = ich_hwseq_erase; - flash->read = ich_hwseq_read; - ich_hwseq_set_addr (0); - switch ((cntlr.hsfs >> 3) & 3) - { - case 0: - flash->sector_size = 256; - break; - case 1: - flash->sector_size = 4096; - break; - case 2: - flash->sector_size = 8192; - break; - case 3: - flash->sector_size = 65536; - break; - } - - writel_ (0x1000, &cntlr.ich9_spi->fdoc); - flcomp = readl_(&cntlr.ich9_spi->fdod); - - flash->size = 1 << (19 + (flcomp & 7)); - - if ((cntlr.hsfs & HSFS_FDV) && ((cntlr.flmap0 >> 8) & 3)) - flash->size += 1 << (19 + ((flcomp >> 3) & 7)); - printk (BIOS_DEBUG, "flash size 0x%x bytes\n", flash->size); - - return flash; -} diff --git a/src/southbridge/intel/common/spi.c b/src/southbridge/intel/common/spi.c new file mode 100644 index 0000000..b323dbb --- /dev/null +++ b/src/southbridge/intel/common/spi.c @@ -0,0 +1,986 @@ +/* + * Copyright (c) 2011 The Chromium OS Authors. + * Copyright (C) 2009, 2010 Carl-Daniel Hailfinger + * Copyright (C) 2011 Stefan Tauner + * + * See file CREDITS for list of people who contributed to this + * project. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License as + * published by the Free Software Foundation; either version 2 of + * the License, or (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but without any warranty; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, + * MA 02111-1307 USA + */ + +/* This file is derived from the flashrom project. */ +#include <stdint.h> +#include <stdlib.h> +#include <string.h> +#include <delay.h> +#include <arch/io.h> +#include <console/console.h> +#include <device/pci_ids.h> +#include <device/pci.h> +#include <spi_flash.h> + +#include <spi-generic.h> + +#define min(a, b) ((a)<(b)?(a):(b)) + +#define HSFC_FCYCLE_OFF 1 /* 1-2: FLASH Cycle */ +#define HSFC_FCYCLE (0x3 << HSFC_FCYCLE_OFF) +#define HSFC_FDBC_OFF 8 /* 8-13: Flash Data Byte Count */ +#define HSFC_FDBC (0x3f << HSFC_FDBC_OFF) + + +#ifdef __SMM__ +#include <arch/pci_mmio_cfg.h> +#define pci_read_config_byte(dev, reg, targ)\ + *(targ) = pci_read_config8(dev, reg) +#define pci_read_config_word(dev, reg, targ)\ + *(targ) = pci_read_config16(dev, reg) +#define pci_read_config_dword(dev, reg, targ)\ + *(targ) = pci_read_config32(dev, reg) +#define pci_write_config_byte(dev, reg, val)\ + pci_write_config8(dev, reg, val) +#define pci_write_config_word(dev, reg, val)\ + pci_write_config16(dev, reg, val) +#define pci_write_config_dword(dev, reg, val)\ + pci_write_config32(dev, reg, val) +#else /* !__SMM__ */ +#include <device/device.h> +#include <device/pci.h> +#define pci_read_config_byte(dev, reg, targ)\ + *(targ) = pci_read_config8(dev, reg) +#define pci_read_config_word(dev, reg, targ)\ + *(targ) = pci_read_config16(dev, reg) +#define pci_read_config_dword(dev, reg, targ)\ + *(targ) = pci_read_config32(dev, reg) +#define pci_write_config_byte(dev, reg, val)\ + pci_write_config8(dev, reg, val) +#define pci_write_config_word(dev, reg, val)\ + pci_write_config16(dev, reg, val) +#define pci_write_config_dword(dev, reg, val)\ + pci_write_config32(dev, reg, val) +#endif /* !__SMM__ */ + +static int spi_is_multichip(void); +static struct spi_flash *spi_flash_hwseq(struct spi_slave *spi); + +typedef struct spi_slave ich_spi_slave; + +static int ichspi_lock = 0; + +typedef struct ich7_spi_regs { + uint16_t spis; + uint16_t spic; + uint32_t spia; + uint64_t spid[8]; + uint64_t _pad; + uint32_t bbar; + uint16_t preop; + uint16_t optype; + uint8_t opmenu[8]; +} __attribute__((packed)) ich7_spi_regs; + +typedef struct ich9_spi_regs { + uint32_t bfpr; + uint16_t hsfs; + uint16_t hsfc; + uint32_t faddr; + uint32_t _reserved0; + uint32_t fdata[16]; + uint32_t frap; + uint32_t freg[5]; + uint32_t _reserved1[3]; + uint32_t pr[5]; + uint32_t _reserved2[2]; + uint8_t ssfs; + uint8_t ssfc[3]; + uint16_t preop; + uint16_t optype; + uint8_t opmenu[8]; + uint32_t bbar; + uint8_t _reserved3[12]; + uint32_t fdoc; + uint32_t fdod; + uint8_t _reserved4[8]; + uint32_t afc; + uint32_t lvscc; + uint32_t uvscc; + uint8_t _reserved5[4]; + uint32_t fpb; + uint8_t _reserved6[28]; + uint32_t srdl; + uint32_t srdc; + uint32_t srd; +} __attribute__((packed)) ich9_spi_regs; + +typedef struct ich_spi_controller { + int locked; + uint32_t flmap0; + uint32_t hsfs; + + ich9_spi_regs *ich9_spi; + uint8_t *opmenu; + int menubytes; + uint16_t *preop; + uint16_t *optype; + uint32_t *addr; + uint8_t *data; + unsigned databytes; + uint8_t *status; + uint16_t *control; + uint32_t *bbar; +} ich_spi_controller; + +static ich_spi_controller cntlr; + +enum { + SPIS_SCIP = 0x0001, + SPIS_GRANT = 0x0002, + SPIS_CDS = 0x0004, + SPIS_FCERR = 0x0008, + SSFS_AEL = 0x0010, + SPIS_LOCK = 0x8000, + SPIS_RESERVED_MASK = 0x7ff0, + SSFS_RESERVED_MASK = 0x7fe2 +}; + +enum { + SPIC_SCGO = 0x000002, + SPIC_ACS = 0x000004, + SPIC_SPOP = 0x000008, + SPIC_DBC = 0x003f00, + SPIC_DS = 0x004000, + SPIC_SME = 0x008000, + SSFC_SCF_MASK = 0x070000, + SSFC_RESERVED = 0xf80000 +}; + +enum { + HSFS_FDONE = 0x0001, + HSFS_FCERR = 0x0002, + HSFS_AEL = 0x0004, + HSFS_BERASE_MASK = 0x0018, + HSFS_BERASE_SHIFT = 3, + HSFS_SCIP = 0x0020, + HSFS_FDOPSS = 0x2000, + HSFS_FDV = 0x4000, + HSFS_FLOCKDN = 0x8000 +}; + +enum { + HSFC_FGO = 0x0001, + HSFC_FCYCLE_MASK = 0x0006, + HSFC_FCYCLE_SHIFT = 1, + HSFC_FDBC_MASK = 0x3f00, + HSFC_FDBC_SHIFT = 8, + HSFC_FSMIE = 0x8000 +}; + +enum { + SPI_OPCODE_TYPE_READ_NO_ADDRESS = 0, + SPI_OPCODE_TYPE_WRITE_NO_ADDRESS = 1, + SPI_OPCODE_TYPE_READ_WITH_ADDRESS = 2, + SPI_OPCODE_TYPE_WRITE_WITH_ADDRESS = 3 +}; + +#if CONFIG_DEBUG_SPI_FLASH + +static u8 readb_(const void *addr) +{ + u8 v = read8((unsigned long)addr); + printk(BIOS_DEBUG, "read %2.2x from %4.4x\n", + v, ((unsigned) addr & 0xffff) - 0xf020); + return v; +} + +static u16 readw_(const void *addr) +{ + u16 v = read16((unsigned long)addr); + printk(BIOS_DEBUG, "read %4.4x from %4.4x\n", + v, ((unsigned) addr & 0xffff) - 0xf020); + return v; +} + +static u32 readl_(const void *addr) +{ + u32 v = read32((unsigned long)addr); + printk(BIOS_DEBUG, "read %8.8x from %4.4x\n", + v, ((unsigned) addr & 0xffff) - 0xf020); + return v; +} + +static void writeb_(u8 b, const void *addr) +{ + write8((unsigned long)addr, b); + printk(BIOS_DEBUG, "wrote %2.2x to %4.4x\n", + b, ((unsigned) addr & 0xffff) - 0xf020); +} + +static void writew_(u16 b, const void *addr) +{ + write16((unsigned long)addr, b); + printk(BIOS_DEBUG, "wrote %4.4x to %4.4x\n", + b, ((unsigned) addr & 0xffff) - 0xf020); +} + +static void writel_(u32 b, const void *addr) +{ + write32((unsigned long)addr, b); + printk(BIOS_DEBUG, "wrote %8.8x to %4.4x\n", + b, ((unsigned) addr & 0xffff) - 0xf020); +} + +#else /* CONFIG_DEBUG_SPI_FLASH ^^^ enabled vvv NOT enabled */ + +#define readb_(a) read8((uint32_t)a) +#define readw_(a) read16((uint32_t)a) +#define readl_(a) read32((uint32_t)a) +#define writeb_(val, addr) write8((uint32_t)addr, val) +#define writew_(val, addr) write16((uint32_t)addr, val) +#define writel_(val, addr) write32((uint32_t)addr, val) + +#endif /* CONFIG_DEBUG_SPI_FLASH ^^^ NOT enabled */ + +static void write_reg(const void *value, void *dest, uint32_t size) +{ + const uint8_t *bvalue = value; + uint8_t *bdest = dest; + + while (size >= 4) { + writel_(*(const uint32_t *)bvalue, bdest); + bdest += 4; bvalue += 4; size -= 4; + } + while (size) { + writeb_(*bvalue, bdest); + bdest++; bvalue++; size--; + } +} + +static void read_reg(const void *src, void *value, uint32_t size) +{ + const uint8_t *bsrc = src; + uint8_t *bvalue = value; + + while (size >= 4) { + *(uint32_t *)bvalue = readl_(bsrc); + bsrc += 4; bvalue += 4; size -= 4; + } + while (size) { + *bvalue = readb_(bsrc); + bsrc++; bvalue++; size--; + } +} + +static void ich_set_bbar(uint32_t minaddr) +{ + const uint32_t bbar_mask = 0x00ffff00; + uint32_t ichspi_bbar; + + minaddr &= bbar_mask; + ichspi_bbar = readl_(cntlr.bbar) & ~bbar_mask; + ichspi_bbar |= minaddr; + writel_(ichspi_bbar, cntlr.bbar); +} + +int spi_cs_is_valid(unsigned int bus, unsigned int cs) +{ + printk(BIOS_DEBUG, "spi_cs_is_valid used but not implemented\n"); + return 0; +} + +struct spi_slave *spi_setup_slave(unsigned int bus, unsigned int cs, + unsigned int max_hz, unsigned int mode) +{ + ich_spi_slave *slave = malloc(sizeof(*slave)); + + if (!slave) { + printk(BIOS_DEBUG, "ICH SPI: Bad allocation\n"); + return NULL; + } + + memset(slave, 0, sizeof(*slave)); + + slave->bus = bus; + slave->cs = cs; + slave->force_programmer_specific = spi_is_multichip (); + slave->programmer_specific_probe = spi_flash_hwseq; + return slave; +} + +void spi_init(void) +{ + uint8_t *rcrb; /* Root Complex Register Block */ + uint32_t rcba; /* Root Complex Base Address */ + uint8_t bios_cntl; + device_t dev; + ich9_spi_regs *ich9_spi; + uint16_t hsfs; + +#ifdef __SMM__ + dev = PCI_DEV(0, 31, 0); +#else + dev = dev_find_slot(0, PCI_DEVFN(31, 0)); +#endif + + pci_read_config_dword(dev, 0xf0, &rcba); + /* Bits 31-14 are the base address, 13-1 are reserved, 0 is enable. */ + rcrb = (uint8_t *)(rcba & 0xffffc000); + ich9_spi = (ich9_spi_regs *)(rcrb + 0x3800); + cntlr.ich9_spi = ich9_spi; + hsfs = readw_(&ich9_spi->hsfs); + ichspi_lock = hsfs & HSFS_FLOCKDN; + cntlr.hsfs = hsfs; + cntlr.opmenu = ich9_spi->opmenu; + cntlr.menubytes = sizeof(ich9_spi->opmenu); + cntlr.optype = &ich9_spi->optype; + cntlr.addr = &ich9_spi->faddr; + cntlr.data = (uint8_t *)ich9_spi->fdata; + cntlr.databytes = sizeof(ich9_spi->fdata); + cntlr.status = &ich9_spi->ssfs; + cntlr.control = (uint16_t *)ich9_spi->ssfc; + cntlr.bbar = &ich9_spi->bbar; + cntlr.preop = &ich9_spi->preop; + + if (cntlr.hsfs & HSFS_FDV) + { + writel_ (4, &ich9_spi->fdoc); + cntlr.flmap0 = readl_(&ich9_spi->fdod); + } + + ich_set_bbar(0); + + /* Disable the BIOS write protect so write commands are allowed. */ + pci_read_config_byte(dev, 0xdc, &bios_cntl); + /* Deassert SMM BIOS Write Protect Disable. */ + bios_cntl &= ~(1 << 5); + pci_write_config_byte(dev, 0xdc, bios_cntl | 0x1); +} + +int spi_claim_bus(struct spi_slave *slave) +{ + /* Handled by ICH automatically. */ + return 0; +} + +void spi_release_bus(struct spi_slave *slave) +{ + /* Handled by ICH automatically. */ +} + +void spi_cs_activate(struct spi_slave *slave) +{ + /* Handled by ICH automatically. */ +} + +void spi_cs_deactivate(struct spi_slave *slave) +{ + /* Handled by ICH automatically. */ +} + +typedef struct spi_transaction { + const uint8_t *out; + uint32_t bytesout; + uint8_t *in; + uint32_t bytesin; + uint8_t type; + uint8_t opcode; + uint32_t offset; +} spi_transaction; + +static inline void spi_use_out(spi_transaction *trans, unsigned bytes) +{ + trans->out += bytes; + trans->bytesout -= bytes; +} + +static inline void spi_use_in(spi_transaction *trans, unsigned bytes) +{ + trans->in += bytes; + trans->bytesin -= bytes; +} + +static void spi_setup_type(spi_transaction *trans) +{ + trans->type = 0xFF; + + /* Try to guess spi type from read/write sizes. */ + if (trans->bytesin == 0) { + if (trans->bytesout > 4) + /* + * If bytesin = 0 and bytesout > 4, we presume this is + * a write data operation, which is accompanied by an + * address. + */ + trans->type = SPI_OPCODE_TYPE_WRITE_WITH_ADDRESS; + else + trans->type = SPI_OPCODE_TYPE_WRITE_NO_ADDRESS; + return; + } + + if (trans->bytesout == 1) { /* and bytesin is > 0 */ + trans->type = SPI_OPCODE_TYPE_READ_NO_ADDRESS; + return; + } + + if (trans->bytesout == 4) { /* and bytesin is > 0 */ + trans->type = SPI_OPCODE_TYPE_READ_WITH_ADDRESS; + } + + /* Fast read command is called with 5 bytes instead of 4 */ + if (trans->out[0] == SPI_OPCODE_FAST_READ && trans->bytesout == 5) { + trans->type = SPI_OPCODE_TYPE_READ_WITH_ADDRESS; + --trans->bytesout; + } +} + +static int spi_setup_opcode(spi_transaction *trans) +{ + uint16_t optypes; + uint8_t opmenu[cntlr.menubytes]; + + trans->opcode = trans->out[0]; + spi_use_out(trans, 1); + if (!ichspi_lock) { + /* The lock is off, so just use index 0. */ + writeb_(trans->opcode, cntlr.opmenu); + optypes = readw_(cntlr.optype); + optypes = (optypes & 0xfffc) | (trans->type & 0x3); + writew_(optypes, cntlr.optype); + return 0; + } else { + /* The lock is on. See if what we need is on the menu. */ + uint8_t optype; + uint16_t opcode_index; + + /* Write Enable is handled as atomic prefix */ + if (trans->opcode == SPI_OPCODE_WREN) + return 0; + + read_reg(cntlr.opmenu, opmenu, sizeof(opmenu)); + for (opcode_index = 0; opcode_index < cntlr.menubytes; + opcode_index++) { + if (opmenu[opcode_index] == trans->opcode) + break; + } + + if (opcode_index == cntlr.menubytes) { + printk(BIOS_DEBUG, "ICH SPI: Opcode %x not found\n", + trans->opcode); + return -1; + } + + optypes = readw_(cntlr.optype); + optype = (optypes >> (opcode_index * 2)) & 0x3; + if (trans->type == SPI_OPCODE_TYPE_WRITE_NO_ADDRESS && + optype == SPI_OPCODE_TYPE_WRITE_WITH_ADDRESS && + trans->bytesout >= 3) { + /* We guessed wrong earlier. Fix it up. */ + trans->type = optype; + } + if (optype != trans->type) { + printk(BIOS_DEBUG, "ICH SPI: Transaction doesn't fit type %d\n", + optype); + return -1; + } + return opcode_index; + } +} + +static int spi_setup_offset(spi_transaction *trans) +{ + /* Separate the SPI address and data. */ + switch (trans->type) { + case SPI_OPCODE_TYPE_READ_NO_ADDRESS: + case SPI_OPCODE_TYPE_WRITE_NO_ADDRESS: + return 0; + case SPI_OPCODE_TYPE_READ_WITH_ADDRESS: + case SPI_OPCODE_TYPE_WRITE_WITH_ADDRESS: + trans->offset = ((uint32_t)trans->out[0] << 16) | + ((uint32_t)trans->out[1] << 8) | + ((uint32_t)trans->out[2] << 0); + spi_use_out(trans, 3); + return 1; + default: + printk(BIOS_DEBUG, "Unrecognized SPI transaction type %#x\n", trans->type); + return -1; + } +} + +/* + * Wait for up to 60ms til status register bit(s) turn 1 (in case wait_til_set + * below is True) or 0. In case the wait was for the bit(s) to set - write + * those bits back, which would cause resetting them. + * + * Return the last read status value on success or -1 on failure. + */ +static int ich_status_poll(u16 bitmask, int wait_til_set) +{ + int timeout = 6000; /* This will result in 60 ms */ + u16 status = 0; + + while (timeout--) { + status = readw_(cntlr.status); + if (wait_til_set ^ ((status & bitmask) == 0)) { + if (wait_til_set) + writew_((status & bitmask), cntlr.status); + return status; + } + udelay(10); + } + + printk(BIOS_DEBUG, "ICH SPI: SCIP timeout, read %x, expected %x\n", + status, bitmask); + return -1; +} + +static int spi_is_multichip (void) +{ + if (!(cntlr.hsfs & HSFS_FDV)) + return 0; + return !!((cntlr.flmap0 >> 8) & 3); +} + +int spi_xfer(struct spi_slave *slave, const void *dout, + unsigned int bitsout, void *din, unsigned int bitsin) +{ + uint16_t control; + int16_t opcode_index; + int with_address; + int status; + + spi_transaction trans = { + dout, bitsout / 8, + din, bitsin / 8, + 0xff, 0xff, 0 + }; + + /* There has to always at least be an opcode. */ + if (!bitsout || !dout) { + printk(BIOS_DEBUG, "ICH SPI: No opcode for transfer\n"); + return -1; + } + /* Make sure if we read something we have a place to put it. */ + if (bitsin != 0 && !din) { + printk(BIOS_DEBUG, "ICH SPI: Read but no target buffer\n"); + return -1; + } + /* Right now we don't support writing partial bytes. */ + if (bitsout % 8 || bitsin % 8) { + printk(BIOS_DEBUG, "ICH SPI: Accessing partial bytes not supported\n"); + return -1; + } + + if (ich_status_poll(SPIS_SCIP, 0) == -1) + return -1; + + writew_(SPIS_CDS | SPIS_FCERR, cntlr.status); + + spi_setup_type(&trans); + if ((opcode_index = spi_setup_opcode(&trans)) < 0) + return -1; + if ((with_address = spi_setup_offset(&trans)) < 0) + return -1; + + if (trans.opcode == SPI_OPCODE_WREN) { + /* + * Treat Write Enable as Atomic Pre-Op if possible + * in order to prevent the Management Engine from + * issuing a transaction between WREN and DATA. + */ + if (!ichspi_lock) + writew_(trans.opcode, cntlr.preop); + return 0; + } + + /* Preset control fields */ + control = SPIC_SCGO | ((opcode_index & 0x07) << 4); + + /* Issue atomic preop cycle if needed */ + if (readw_(cntlr.preop)) + control |= SPIC_ACS; + + if (!trans.bytesout && !trans.bytesin) { + /* SPI addresses are 24 bit only */ + if (with_address) + writel_(trans.offset & 0x00FFFFFF, cntlr.addr); + + /* + * This is a 'no data' command (like Write Enable), its + * bitesout size was 1, decremented to zero while executing + * spi_setup_opcode() above. Tell the chip to send the + * command. + */ + writew_(control, cntlr.control); + + /* wait for the result */ + status = ich_status_poll(SPIS_CDS | SPIS_FCERR, 1); + if (status == -1) + return -1; + + if (status & SPIS_FCERR) { + printk(BIOS_DEBUG, "ICH SPI: Command transaction error\n"); + return -1; + } + + return 0; + } + + /* + * Check if this is a write command attempting to transfer more bytes + * than the controller can handle. Iterations for writes are not + * supported here because each SPI write command needs to be preceded + * and followed by other SPI commands, and this sequence is controlled + * by the SPI chip driver. + */ + if (trans.bytesout > cntlr.databytes) { + printk(BIOS_DEBUG, "ICH SPI: Too much to write. Does your SPI chip driver use" + " CONTROLLER_PAGE_LIMIT?\n"); + return -1; + } + + /* + * Read or write up to databytes bytes at a time until everything has + * been sent. + */ + while (trans.bytesout || trans.bytesin) { + uint32_t data_length; + + /* SPI addresses are 24 bit only */ + writel_(trans.offset & 0x00FFFFFF, cntlr.addr); + + if (trans.bytesout) + data_length = min(trans.bytesout, cntlr.databytes); + else + data_length = min(trans.bytesin, cntlr.databytes); + + /* Program data into FDATA0 to N */ + if (trans.bytesout) { + write_reg(trans.out, cntlr.data, data_length); + spi_use_out(&trans, data_length); + if (with_address) + trans.offset += data_length; + } + + /* Add proper control fields' values */ + control &= ~((cntlr.databytes - 1) << 8); + control |= SPIC_DS; + control |= (data_length - 1) << 8; + + /* write it */ + writew_(control, cntlr.control); + + /* Wait for Cycle Done Status or Flash Cycle Error. */ + status = ich_status_poll(SPIS_CDS | SPIS_FCERR, 1); + if (status == -1) + return -1; + + if (status & SPIS_FCERR) { + printk(BIOS_DEBUG, "ICH SPI: Data transaction error\n"); + return -1; + } + + if (trans.bytesin) { + read_reg(cntlr.data, trans.in, data_length); + spi_use_in(&trans, data_length); + if (with_address) + trans.offset += data_length; + } + } + + /* Clear atomic preop now that xfer is done */ + writew_(0, cntlr.preop); + + return 0; +} + +/* Sets FLA in FADDR to (addr & 0x01FFFFFF) without touching other bits. */ +static void ich_hwseq_set_addr(uint32_t addr) +{ + uint32_t addr_old = readl_(&cntlr.ich9_spi->faddr) & ~0x01FFFFFF; + writel_((addr & 0x01FFFFFF) | addr_old, &cntlr.ich9_spi->faddr); +} + +/* Polls for Cycle Done Status, Flash Cycle Error or timeout in 8 us intervals. + Resets all error flags in HSFS. + Returns 0 if the cycle completes successfully without errors within + timeout us, 1 on errors. */ +static int ich_hwseq_wait_for_cycle_complete(unsigned int timeout, + unsigned int len) +{ + uint16_t hsfs; + uint32_t addr; + + timeout /= 8; /* scale timeout duration to counter */ + while ((((hsfs = readw_(&cntlr.ich9_spi->hsfs)) & + (HSFS_FDONE | HSFS_FCERR)) == 0) && + --timeout) { + udelay(8); + } + writew_(readw_(&cntlr.ich9_spi->hsfs), &cntlr.ich9_spi->hsfs); + + if (!timeout) { + uint16_t hsfc; + addr = readl_(&cntlr.ich9_spi->faddr) & 0x01FFFFFF; + hsfc = readw_(&cntlr.ich9_spi->hsfc); + printk(BIOS_ERR, "Transaction timeout between offset 0x%08x and " + "0x%08x (= 0x%08x + %d) HSFC=%x HSFS=%x!\n", + addr, addr + len - 1, addr, len - 1, + hsfc, hsfs); + return 1; + } + + if (hsfs & HSFS_FCERR) { + uint16_t hsfc; + addr = readl_(&cntlr.ich9_spi->faddr) & 0x01FFFFFF; + hsfc = readw_(&cntlr.ich9_spi->hsfc); + printk(BIOS_ERR, "Transaction error between offset 0x%08x and " + "0x%08x (= 0x%08x + %d) HSFC=%x HSFS=%x!\n", + addr, addr + len - 1, addr, len - 1, + hsfc, hsfs); + return 1; + } + return 0; +} + + +static int ich_hwseq_erase(struct spi_flash *flash, u32 offset, size_t len) +{ + u32 start, end, erase_size; + int ret; + uint16_t hsfc; + uint16_t timeout = 1000 * 60; + + erase_size = flash->sector_size; + if (offset % erase_size || len % erase_size) { + printk(BIOS_ERR, "SF: Erase offset/length not multiple of erase size\n"); + return -1; + } + + flash->spi->rw = SPI_WRITE_FLAG; + ret = spi_claim_bus(flash->spi); + if (ret) { + printk(BIOS_ERR, "SF: Unable to claim SPI bus\n"); + return ret; + } + + start = offset; + end = start + len; + + while (offset < end) { + /* make sure FDONE, FCERR, AEL are cleared by writing 1 to them */ + writew_(readw_(&cntlr.ich9_spi->hsfs), &cntlr.ich9_spi->hsfs); + + ich_hwseq_set_addr(offset); + + offset += erase_size; + + hsfc = readw_(&cntlr.ich9_spi->hsfc); + hsfc &= ~HSFC_FCYCLE; /* clear operation */ + hsfc |= (0x3 << HSFC_FCYCLE_OFF); /* set erase operation */ + hsfc |= HSFC_FGO; /* start */ + writew_(hsfc, &cntlr.ich9_spi->hsfc); + if (ich_hwseq_wait_for_cycle_complete(timeout, len)) + { + printk(BIOS_ERR, "SF: Erase failed at %x\n", offset - erase_size); + ret = -1; + goto out; + } + } + + printk(BIOS_DEBUG, "SF: Successfully erased %zu bytes @ %#x\n", len, start); + +out: + spi_release_bus(flash->spi); + return ret; +} + +static void ich_read_data(uint8_t *data, int len) +{ + int i; + uint32_t temp32 = 0; + + for (i = 0; i < len; i++) { + if ((i % 4) == 0) + temp32 = readl_(cntlr.data + i); + + data[i] = (temp32 >> ((i % 4) * 8)) & 0xff; + } +} + +static int ich_hwseq_read(struct spi_flash *flash, + u32 addr, size_t len, void *buf) +{ + uint16_t hsfc; + uint16_t timeout = 100 * 60; + uint8_t block_len; + + if (addr + len > flash->size) { + printk (BIOS_ERR, + "Attempt to read %x-%x which is out of chip\n", + (unsigned) addr, + (unsigned) addr+(unsigned) len); + return -1; + } + + /* clear FDONE, FCERR, AEL by writing 1 to them (if they are set) */ + writew_(readw_(&cntlr.ich9_spi->hsfs), &cntlr.ich9_spi->hsfs); + + while (len > 0) { + block_len = min(len, cntlr.databytes); + if (block_len > (~addr & 0xff)) + block_len = (~addr & 0xff) + 1; + ich_hwseq_set_addr(addr); + hsfc = readw_(&cntlr.ich9_spi->hsfc); + hsfc &= ~HSFC_FCYCLE; /* set read operation */ + hsfc &= ~HSFC_FDBC; /* clear byte count */ + /* set byte count */ + hsfc |= (((block_len - 1) << HSFC_FDBC_OFF) & HSFC_FDBC); + hsfc |= HSFC_FGO; /* start */ + writew_(hsfc, &cntlr.ich9_spi->hsfc); + + if (ich_hwseq_wait_for_cycle_complete(timeout, block_len)) + return 1; + ich_read_data(buf, block_len); + addr += block_len; + buf += block_len; + len -= block_len; + } + return 0; +} + +/* Fill len bytes from the data array into the fdata/spid registers. + * + * Note that using len > flash->pgm->spi.max_data_write will trash the registers + * following the data registers. + */ +static void ich_fill_data(const uint8_t *data, int len) +{ + uint32_t temp32 = 0; + int i; + + if (len <= 0) + return; + + for (i = 0; i < len; i++) { + if ((i % 4) == 0) + temp32 = 0; + + temp32 |= ((uint32_t) data[i]) << ((i % 4) * 8); + + if ((i % 4) == 3) /* 32 bits are full, write them to regs. */ + writel_(temp32, cntlr.data + (i - (i % 4))); + } + i--; + if ((i % 4) != 3) /* Write remaining data to regs. */ + writel_(temp32, cntlr.data + (i - (i % 4))); +} + +static int ich_hwseq_write(struct spi_flash *flash, + u32 addr, size_t len, const void *buf) +{ + uint16_t hsfc; + uint16_t timeout = 100 * 60; + uint8_t block_len; + uint32_t start = addr; + + if (addr + len > flash->size) { + printk (BIOS_ERR, + "Attempt to write 0x%x-0x%x which is out of chip\n", + (unsigned)addr, (unsigned) (addr+len)); + return -1; + } + + /* clear FDONE, FCERR, AEL by writing 1 to them (if they are set) */ + writew_(readw_(&cntlr.ich9_spi->hsfs), &cntlr.ich9_spi->hsfs); + + while (len > 0) { + block_len = min(len, cntlr.databytes); + if (block_len > (~addr & 0xff)) + block_len = (~addr & 0xff) + 1; + + ich_hwseq_set_addr(addr); + + ich_fill_data(buf, block_len); + hsfc = readw_(&cntlr.ich9_spi->hsfc); + hsfc &= ~HSFC_FCYCLE; /* clear operation */ + hsfc |= (0x2 << HSFC_FCYCLE_OFF); /* set write operation */ + hsfc &= ~HSFC_FDBC; /* clear byte count */ + /* set byte count */ + hsfc |= (((block_len - 1) << HSFC_FDBC_OFF) & HSFC_FDBC); + hsfc |= HSFC_FGO; /* start */ + writew_(hsfc, &cntlr.ich9_spi->hsfc); + + if (ich_hwseq_wait_for_cycle_complete(timeout, block_len)) + { + printk (BIOS_ERR, "SF: write failure at %x\n", + addr); + return -1; + } + addr += block_len; + buf += block_len; + len -= block_len; + } + printk(BIOS_DEBUG, "SF: Successfully written %u bytes @ %#x\n", + (unsigned) (addr - start), start); + return 0; +} + + +static struct spi_flash *spi_flash_hwseq(struct spi_slave *spi) +{ + struct spi_flash *flash = NULL; + uint32_t flcomp; + + flash = malloc(sizeof(*flash)); + if (!flash) { + printk(BIOS_WARNING, "SF: Failed to allocate memory\n"); + return NULL; + } + + flash->spi = spi; + flash->name = "Opaque HW-sequencing"; + + flash->write = ich_hwseq_write; + flash->erase = ich_hwseq_erase; + flash->read = ich_hwseq_read; + ich_hwseq_set_addr (0); + switch ((cntlr.hsfs >> 3) & 3) + { + case 0: + flash->sector_size = 256; + break; + case 1: + flash->sector_size = 4096; + break; + case 2: + flash->sector_size = 8192; + break; + case 3: + flash->sector_size = 65536; + break; + } + + writel_ (0x1000, &cntlr.ich9_spi->fdoc); + flcomp = readl_(&cntlr.ich9_spi->fdod); + + flash->size = 1 << (19 + (flcomp & 7)); + + if ((cntlr.hsfs & HSFS_FDV) && ((cntlr.flmap0 >> 8) & 3)) + flash->size += 1 << (19 + ((flcomp >> 3) & 7)); + printk (BIOS_DEBUG, "flash size 0x%x bytes\n", flash->size); + + return flash; +} diff --git a/src/southbridge/intel/fsp_bd82x6x/Makefile.inc b/src/southbridge/intel/fsp_bd82x6x/Makefile.inc index dac1241..19c66a9 100644 --- a/src/southbridge/intel/fsp_bd82x6x/Makefile.inc +++ b/src/southbridge/intel/fsp_bd82x6x/Makefile.inc @@ -36,8 +36,8 @@ ramstage-y += reset.c ramstage-y += watchdog.c
ramstage-$(CONFIG_ELOG) += elog.c -ramstage-y += spi.c -smm-$(CONFIG_SPI_FLASH_SMM) += spi.c +ramstage-y += ../spi.c +smm-$(CONFIG_SPI_FLASH_SMM) += ../spi.c
ramstage-$(CONFIG_HAVE_SMI_HANDLER) += smi.c smm-$(CONFIG_HAVE_SMI_HANDLER) += smihandler.c me.c me_8.x.c finalize.c diff --git a/src/southbridge/intel/fsp_bd82x6x/spi.c b/src/southbridge/intel/fsp_bd82x6x/spi.c deleted file mode 100644 index 887463a..0000000 --- a/src/southbridge/intel/fsp_bd82x6x/spi.c +++ /dev/null @@ -1,751 +0,0 @@ -/* - * Copyright (c) 2011 The Chromium OS Authors. - * - * See file CREDITS for list of people who contributed to this - * project. - * - * This program is free software; you can redistribute it and/or - * modify it under the terms of the GNU General Public License as - * published by the Free Software Foundation; either version 2 of - * the License, or (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but without any warranty; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 59 Temple Place, Suite 330, Boston, - * MA 02111-1307 USA - */ - -/* This file is derived from the flashrom project. */ -#include <stdint.h> -#include <stdlib.h> -#include <string.h> -#include <delay.h> -#include <arch/io.h> -#include <console/console.h> -#include <device/pci_ids.h> - -#include <spi-generic.h> - -static int ich_status_poll(u16 bitmask, int wait_til_set); - -#define min(a, b) ((a)<(b)?(a):(b)) - -#ifdef __SMM__ -#include <arch/pci_mmio_cfg.h> -#define pci_read_config_byte(dev, reg, targ)\ - *(targ) = pci_read_config8(dev, reg) -#define pci_read_config_word(dev, reg, targ)\ - *(targ) = pci_read_config16(dev, reg) -#define pci_read_config_dword(dev, reg, targ)\ - *(targ) = pci_read_config32(dev, reg) -#define pci_write_config_byte(dev, reg, val)\ - pci_write_config8(dev, reg, val) -#define pci_write_config_word(dev, reg, val)\ - pci_write_config16(dev, reg, val) -#define pci_write_config_dword(dev, reg, val)\ - pci_write_config32(dev, reg, val) -#else /* !__SMM__ */ -#include <device/device.h> -#include <device/pci.h> -#define pci_read_config_byte(dev, reg, targ)\ - *(targ) = pci_read_config8(dev, reg) -#define pci_read_config_word(dev, reg, targ)\ - *(targ) = pci_read_config16(dev, reg) -#define pci_read_config_dword(dev, reg, targ)\ - *(targ) = pci_read_config32(dev, reg) -#define pci_write_config_byte(dev, reg, val)\ - pci_write_config8(dev, reg, val) -#define pci_write_config_word(dev, reg, val)\ - pci_write_config16(dev, reg, val) -#define pci_write_config_dword(dev, reg, val)\ - pci_write_config32(dev, reg, val) -#endif /* !__SMM__ */ - -typedef struct spi_slave ich_spi_slave; - -static int ichspi_lock = 0; - -typedef struct ich7_spi_regs { - uint16_t spis; - uint16_t spic; - uint32_t spia; - uint64_t spid[8]; - uint64_t _pad; - uint32_t bbar; - uint16_t preop; - uint16_t optype; - uint8_t opmenu[8]; -} __attribute__((packed)) ich7_spi_regs; - -typedef struct ich9_spi_regs { - uint32_t bfpr; // 0 - uint16_t hsfs; // 4 - uint16_t hsfc; // 6 - uint32_t faddr; // 8 - uint32_t _reserved0; // 0xC - uint32_t fdata[16]; // 0x10 - uint32_t frap; // 0x50 - uint32_t freg[5]; // 0x54 - uint32_t _reserved1[3]; // 0x67 - uint32_t pr[5]; // 0x74 - uint32_t _reserved2[2]; // 0x88 - uint8_t ssfs; // 0x90 - uint8_t ssfc[3]; // 0x91 - uint16_t preop; // 0x94 - uint16_t optype; // 0x96 - uint8_t opmenu[8]; // 0x98 - uint32_t bbar; // 0xB0 - uint8_t _reserved3[12]; - uint32_t fdoc; - uint32_t fdod; - uint8_t _reserved4[8]; - uint32_t afc; - uint32_t lvscc; - uint32_t uvscc; - uint8_t _reserved5[4]; - uint32_t fpb; - uint8_t _reserved6[28]; - uint32_t srdl; - uint32_t srdc; - uint32_t srd; -} __attribute__((packed)) ich9_spi_regs; - -typedef struct ich_spi_controller { - int locked; - - uint8_t *opmenu; - int menubytes; - uint16_t *preop; - uint16_t *optype; - uint32_t *addr; - uint8_t *data; - unsigned databytes; - uint8_t *status; - uint16_t *control; - uint32_t *bbar; -} ich_spi_controller; - -static ich_spi_controller cntlr; - -enum { - SPIS_SCIP = 0x0001, - SPIS_GRANT = 0x0002, - SPIS_CDS = 0x0004, - SPIS_FCERR = 0x0008, - SSFS_AEL = 0x0010, - SPIS_LOCK = 0x8000, - SPIS_RESERVED_MASK = 0x7ff0, - SSFS_RESERVED_MASK = 0x7fe2 -}; - -enum { - SPIC_SCGO = 0x000002, - SPIC_ACS = 0x000004, - SPIC_SPOP = 0x000008, - SPIC_DBC = 0x003f00, - SPIC_DS = 0x004000, - SPIC_SME = 0x008000, - SSFC_SCF_MASK = 0x070000, - SSFC_RESERVED = 0xf80000 -}; - -enum { - HSFS_FDONE = 0x0001, - HSFS_FCERR = 0x0002, - HSFS_AEL = 0x0004, - HSFS_BERASE_MASK = 0x0018, - HSFS_BERASE_SHIFT = 3, - HSFS_SCIP = 0x0020, - HSFS_FDOPSS = 0x2000, - HSFS_FDV = 0x4000, - HSFS_FLOCKDN = 0x8000 -}; - -enum { - HSFC_FGO = 0x0001, - HSFC_FCYCLE_MASK = 0x0006, - HSFC_FCYCLE_SHIFT = 1, - HSFC_FDBC_MASK = 0x3f00, - HSFC_FDBC_SHIFT = 8, - HSFC_FSMIE = 0x8000 -}; - -enum { - SPI_OPCODE_TYPE_READ_NO_ADDRESS = 0, - SPI_OPCODE_TYPE_WRITE_NO_ADDRESS = 1, - SPI_OPCODE_TYPE_READ_WITH_ADDRESS = 2, - SPI_OPCODE_TYPE_WRITE_WITH_ADDRESS = 3, -}; - -#if CONFIG_DEBUG_SPI_FLASH - -static u8 readb_(const void *addr) -{ - u8 v = read8((unsigned long)addr); - printk(BIOS_DEBUG, "read %02x from %p\n", - v, addr); - return v; -} - -static u16 readw_(const void *addr) -{ - u16 v = read16((unsigned long)addr); - printk(BIOS_DEBUG, "read %04x from %p\n", - v, addr); - return v; -} - -static u32 readl_(const void *addr) -{ - u32 v = read32((unsigned long)addr); - printk(BIOS_DEBUG, "read %08x from %p\n", - v, addr); - return v; -} - -static void writeb_(u8 b, const void *addr) -{ - write8((unsigned long)addr, b); - printk(BIOS_DEBUG, "wrote %02x to %p\n", - b, addr); -} - -static void writew_(u16 b, const void *addr) -{ - write16((unsigned long)addr, b); - printk(BIOS_DEBUG, "wrote %04x to %p\n", - b, addr); -} - -static void writel_(u32 b, const void *addr) -{ - write32((unsigned long)addr, b); - printk(BIOS_DEBUG, "wrote %08x to %p\n", - b, addr); -} - -#else /* CONFIG_DEBUG_SPI_FLASH ^^^ enabled vvv NOT enabled */ - -#define readb_(a) read8((uint32_t)a) -#define readw_(a) read16((uint32_t)a) -#define readl_(a) read32((uint32_t)a) -#define writeb_(val, addr) write8((uint32_t)addr, val) -#define writew_(val, addr) write16((uint32_t)addr, val) -#define writel_(val, addr) write32((uint32_t)addr, val) - -#endif /* CONFIG_DEBUG_SPI_FLASH ^^^ NOT enabled */ - -static void write_reg(const void *value, void *dest, uint32_t size) -{ - const uint8_t *bvalue = value; - uint8_t *bdest = dest; - - while (size >= 4) { - writel_(*(const uint32_t *)bvalue, bdest); - bdest += 4; bvalue += 4; size -= 4; - } - while (size) { - writeb_(*bvalue, bdest); - bdest++; bvalue++; size--; - } -} - -static void read_reg(const void *src, void *value, uint32_t size) -{ - const uint8_t *bsrc = src; - uint8_t *bvalue = value; - - while (size >= 4) { - *(uint32_t *)bvalue = readl_(bsrc); - bsrc += 4; bvalue += 4; size -= 4; - } - while (size) { - *bvalue = readb_(bsrc); - bsrc++; bvalue++; size--; - } -} - -static void ich_set_bbar(uint32_t minaddr) -{ - const uint32_t bbar_mask = 0x00ffff00; - uint32_t ichspi_bbar; - - minaddr &= bbar_mask; - ichspi_bbar = readl_(cntlr.bbar) & ~bbar_mask; - ichspi_bbar |= minaddr; - writel_(ichspi_bbar, cntlr.bbar); -} - -int spi_cs_is_valid(unsigned int bus, unsigned int cs) -{ - printk(BIOS_DEBUG, "spi_cs_is_valid used but not implemented\n"); - return 0; -} - -struct spi_slave *spi_setup_slave(unsigned int bus, unsigned int cs, - unsigned int max_hz, unsigned int mode) -{ - ich_spi_slave *slave = malloc(sizeof(*slave)); - - if (!slave) { - printk(BIOS_DEBUG, "ICH SPI: Bad allocation\n"); - return NULL; - } - - memset(slave, 0, sizeof(*slave)); - - slave->bus = bus; - slave->cs = cs; - return slave; -} - -/* - * Check if this device ID matches one of supported Intel PCH devices. - * - * Return the ICH version if there is a match, or zero otherwise. - */ -static inline int get_ich_version(uint16_t device_id) -{ - if (device_id == PCI_DEVICE_ID_INTEL_TGP_LPC) - return 7; - - if ((device_id >= PCI_DEVICE_ID_INTEL_COUGARPOINT_LPC_MIN && - device_id <= PCI_DEVICE_ID_INTEL_COUGARPOINT_LPC_MAX) || - (device_id >= PCI_DEVICE_ID_INTEL_PANTHERPOINT_LPC_MIN && - device_id <= PCI_DEVICE_ID_INTEL_PANTHERPOINT_LPC_MAX)) - return 9; - - return 0; -} - -void spi_init(void) -{ - int ich_version = 0; - - uint8_t *rcrb; /* Root Complex Register Block */ - uint32_t rcba; /* Root Complex Base Address */ - uint8_t bios_cntl; - device_t dev; - uint32_t ids; - uint16_t vendor_id, device_id; - -#ifdef __SMM__ - dev = PCI_DEV(0, 31, 0); -#else - dev = dev_find_slot(0, PCI_DEVFN(31, 0)); -#endif - pci_read_config_dword(dev, 0, &ids); - vendor_id = ids; - device_id = (ids >> 16); - - if (vendor_id != PCI_VENDOR_ID_INTEL) { - printk(BIOS_DEBUG, "ICH SPI: No ICH found.\n"); - return; - } - - ich_version = get_ich_version(device_id); - - if (!ich_version) { - printk(BIOS_DEBUG, "ICH SPI: No known ICH found.\n"); - return; - } - - pci_read_config_dword(dev, 0xf0, &rcba); - /* Bits 31-14 are the base address, 13-1 are reserved, 0 is enable. */ - rcrb = (uint8_t *)(rcba & 0xffffc000); - switch (ich_version) { - case 7: - { - const uint16_t ich7_spibar_offset = 0x3020; - ich7_spi_regs *ich7_spi = - (ich7_spi_regs *)(rcrb + ich7_spibar_offset); - - ichspi_lock = readw_(&ich7_spi->spis) & SPIS_LOCK; - cntlr.opmenu = ich7_spi->opmenu; - cntlr.menubytes = sizeof(ich7_spi->opmenu); - cntlr.optype = &ich7_spi->optype; - cntlr.addr = &ich7_spi->spia; - cntlr.data = (uint8_t *)ich7_spi->spid; - cntlr.databytes = sizeof(ich7_spi->spid); - cntlr.status = (uint8_t *)&ich7_spi->spis; - cntlr.control = &ich7_spi->spic; - cntlr.bbar = &ich7_spi->bbar; - cntlr.preop = &ich7_spi->preop; - break; - } - case 9: - { - const uint16_t ich9_spibar_offset = 0x3800; - ich9_spi_regs *ich9_spi = - (ich9_spi_regs *)(rcrb + ich9_spibar_offset); - ichspi_lock = readw_(&ich9_spi->hsfs) & HSFS_FLOCKDN; - cntlr.opmenu = ich9_spi->opmenu; - cntlr.menubytes = sizeof(ich9_spi->opmenu); - cntlr.optype = &ich9_spi->optype; - cntlr.addr = &ich9_spi->faddr; - cntlr.data = (uint8_t *)ich9_spi->fdata; - cntlr.databytes = sizeof(ich9_spi->fdata); - cntlr.status = &ich9_spi->ssfs; - cntlr.control = (uint16_t *)ich9_spi->ssfc; - cntlr.bbar = &ich9_spi->bbar; - cntlr.preop = &ich9_spi->preop; - break; - } - default: - printk(BIOS_DEBUG, "ICH SPI: Unrecognized ICH version %d.\n", ich_version); - } - - ich_set_bbar(0); - - /* Disable the BIOS write protect so write commands are allowed. */ - pci_read_config_byte(dev, 0xdc, &bios_cntl); - switch (ich_version) { - case 9: - /* Deassert SMM BIOS Write Protect Disable. */ - bios_cntl &= ~(1 << 5); - break; - - default: - break; - } - pci_write_config_byte(dev, 0xdc, bios_cntl | 0x1); -} - -int spi_claim_bus(struct spi_slave *slave) -{ - /* Handled by ICH automatically. */ - return 0; -} - -void spi_release_bus(struct spi_slave *slave) -{ - /* Handled by ICH automatically. */ -} - -void spi_cs_activate(struct spi_slave *slave) -{ - /* Handled by ICH automatically. */ -} - -void spi_cs_deactivate(struct spi_slave *slave) -{ - /* Handled by ICH automatically. */ -} - -typedef struct spi_transaction { - const uint8_t *out; - uint32_t bytesout; - uint8_t *in; - uint32_t bytesin; - uint8_t type; - uint8_t opcode; - uint32_t offset; -} spi_transaction; - -static inline void spi_use_out(spi_transaction *trans, unsigned bytes) -{ - trans->out += bytes; - trans->bytesout -= bytes; -} - -static inline void spi_use_in(spi_transaction *trans, unsigned bytes) -{ - trans->in += bytes; - trans->bytesin -= bytes; -} - -static void spi_setup_type(spi_transaction *trans) -{ - trans->type = 0xFF; - - /* Try to guess spi type from read/write sizes. */ - if (trans->bytesin == 0) { - if (trans->bytesout >= 4) - /* - * If bytesin = 0 and bytesout > 4, we presume this is - * a write data operation, which is accompanied by an - * address. - */ - trans->type = SPI_OPCODE_TYPE_WRITE_WITH_ADDRESS; - else - trans->type = SPI_OPCODE_TYPE_WRITE_NO_ADDRESS; - return; - } - - if (trans->bytesout == 1) { /* and bytesin is > 0 */ - trans->type = SPI_OPCODE_TYPE_READ_NO_ADDRESS; - return; - } - - if (trans->bytesout == 4) { /* and bytesin is > 0 */ - trans->type = SPI_OPCODE_TYPE_READ_WITH_ADDRESS; - } - - /* Fast read command is called with 5 bytes instead of 4 */ - if (trans->out[0] == SPI_OPCODE_FAST_READ && trans->bytesout == 5) { - trans->type = SPI_OPCODE_TYPE_READ_WITH_ADDRESS; - --trans->bytesout; - } -} - -static int spi_setup_opcode(spi_transaction *trans) -{ - uint16_t optypes; - uint8_t opmenu[cntlr.menubytes]; - - trans->opcode = trans->out[0]; - - /* Write Enable is handled as atomic prefix */ - if (trans->opcode == SPI_OPCODE_WREN) - return 0; - - spi_use_out(trans, 1); - if (!ichspi_lock) { - /* The lock is off, so just use index 0. */ - writeb_(trans->opcode, cntlr.opmenu); - optypes = readw_(cntlr.optype); - optypes = (optypes & 0xfffc) | (trans->type & 0x3); - writew_(optypes, cntlr.optype); - return 0; - } else { - /* The lock is on. See if what we need is on the menu. */ - uint8_t optype; - uint16_t opcode_index; - - read_reg(cntlr.opmenu, opmenu, sizeof(opmenu)); - for (opcode_index = 0; opcode_index < cntlr.menubytes; - opcode_index++) { - if (opmenu[opcode_index] == trans->opcode) - break; - } - - if (opcode_index == cntlr.menubytes) { - printk(BIOS_DEBUG, "ICH SPI: Opcode %x not found\n", - trans->opcode); - return -1; - } - - optypes = readw_(cntlr.optype); - optype = (optypes >> (opcode_index * 2)) & 0x3; - if (trans->type == SPI_OPCODE_TYPE_WRITE_NO_ADDRESS && - optype == SPI_OPCODE_TYPE_WRITE_WITH_ADDRESS && - trans->bytesout >= 3) { - /* We guessed wrong earlier. Fix it up. */ - trans->type = optype; - } - if (optype != trans->type) { - printk(BIOS_DEBUG, "ICH SPI: Transaction doesn't fit type %d\n", - optype); - return -1; - } - return opcode_index; - } -} - -static int spi_setup_offset(spi_transaction *trans) -{ - /* Separate the SPI address and data. */ - switch (trans->type) { - case SPI_OPCODE_TYPE_READ_NO_ADDRESS: - case SPI_OPCODE_TYPE_WRITE_NO_ADDRESS: - return 0; - case SPI_OPCODE_TYPE_READ_WITH_ADDRESS: - case SPI_OPCODE_TYPE_WRITE_WITH_ADDRESS: - trans->offset = ((uint32_t)trans->out[0] << 16) | - ((uint32_t)trans->out[1] << 8) | - ((uint32_t)trans->out[2] << 0); - spi_use_out(trans, 3); - return 1; - default: - printk(BIOS_DEBUG, "Unrecognized SPI transaction type %#x\n", trans->type); - return -1; - } -} - -/* - * Wait for up to 60ms til status register bit(s) turn 1 (in case wait_til_set - * below is True) or 0. In case the wait was for the bit(s) to set - write - * those bits back, which would cause resetting them. - * - * Return the last read status value on success or -1 on failure. - */ -static int ich_status_poll(u16 bitmask, int wait_til_set) -{ - int timeout = 6000; /* This will result in 60 ms */ - u16 status = 0; - - while (timeout--) { - status = readb_(cntlr.status); - if (wait_til_set ^ ((status & bitmask) == 0)) { - if (wait_til_set) - writeb_((status & bitmask), cntlr.status); - return status; - } - udelay(10); - } - - printk(BIOS_DEBUG, "ICH SPI: SCIP timeout, read %x, expected %x\n", - status, bitmask); - return -1; -} - -int spi_xfer(struct spi_slave *slave, const void *dout, - unsigned int bitsout, void *din, unsigned int bitsin) -{ - uint16_t control; - int16_t opcode_index; - int with_address; - int status; - - spi_transaction trans = { - dout, bitsout / 8, - din, bitsin / 8, - 0xff, 0xff, 0 - }; - - /* There has to always at least be an opcode. */ - if (!bitsout || !dout) { - printk(BIOS_DEBUG, "ICH SPI: No opcode for transfer\n"); - return -1; - } - /* Make sure if we read something we have a place to put it. */ - if (bitsin != 0 && !din) { - printk(BIOS_DEBUG, "ICH SPI: Read but no target buffer\n"); - return -1; - } - /* Right now we don't support writing partial bytes. */ - if (bitsout % 8 || bitsin % 8) { - printk(BIOS_DEBUG, "ICH SPI: Accessing partial bytes not supported\n"); - return -1; - } - - if (ich_status_poll(SPIS_SCIP, 0) == -1) - return -1; - - writew_(SPIS_CDS | SPIS_FCERR, cntlr.status); - - spi_setup_type(&trans); - if ((opcode_index = spi_setup_opcode(&trans)) < 0) - return -1; - if ((with_address = spi_setup_offset(&trans)) < 0) - return -1; - - if (trans.opcode == SPI_OPCODE_WREN) { - /* - * Treat Write Enable as Atomic Pre-Op if possible - * in order to prevent the Management Engine from - * issuing a transaction between WREN and DATA. - */ - if (!ichspi_lock) - writew_(trans.opcode, cntlr.preop); - - return 0; - } - - /* Preset control fields */ - control = SPIC_SCGO | ((opcode_index & 0x07) << 4); - - /* Issue atomic preop cycle if needed */ - if (readw_(cntlr.preop)) - control |= SPIC_ACS; - - if (!trans.bytesout && !trans.bytesin) { - /* SPI addresses are 24 bit only */ - if (with_address) - writel_(trans.offset & 0x00FFFFFF, cntlr.addr); - - /* - * This is a 'no data' command (like Write Enable), its - * bitesout size was 1, decremented to zero while executing - * spi_setup_opcode() above. Tell the chip to send the - * command. - */ - writew_(control, cntlr.control); - - /* wait for the result */ - status = ich_status_poll(SPIS_CDS | SPIS_FCERR, 1); - if (status == -1) - return -1; - - if (status & SPIS_FCERR) { - printk(BIOS_DEBUG, "ICH SPI: Command transaction error\n"); - return -1; - } - - goto spi_xfer_exit; - } - - /* - * Check if this is a write command attempting to transfer more bytes - * than the controller can handle. Iterations for writes are not - * supported here because each SPI write command needs to be preceded - * and followed by other SPI commands, and this sequence is controlled - * by the SPI chip driver. - */ - if (trans.bytesout > cntlr.databytes) { - printk(BIOS_DEBUG, "ICH SPI: Too much to write. Does your SPI chip driver use" - " CONTROLLER_PAGE_LIMIT?\n"); - return -1; - } - - /* - * Read or write up to databytes bytes at a time until everything has - * been sent. - */ - while (trans.bytesout || trans.bytesin) { - uint32_t data_length; - - /* SPI addresses are 24 bit only */ - if (with_address) - writel_(trans.offset & 0x00FFFFFF, cntlr.addr); - - if (trans.bytesout) - data_length = min(trans.bytesout, cntlr.databytes); - else - data_length = min(trans.bytesin, cntlr.databytes); - - /* Program data into FDATA0 to N */ - if (trans.bytesout) { - write_reg(trans.out, cntlr.data, data_length); - spi_use_out(&trans, data_length); - if (with_address) - trans.offset += data_length; - } - - /* Add proper control fields' values */ - control &= ~((cntlr.databytes - 1) << 8); - control |= SPIC_DS; - control |= (data_length - 1) << 8; - - /* write it */ - writew_(control, cntlr.control); - - /* Wait for Cycle Done Status or Flash Cycle Error. */ - status = ich_status_poll(SPIS_CDS | SPIS_FCERR, 1); - if (status == -1) - return -1; - - if (status & SPIS_FCERR) { - printk(BIOS_DEBUG, "ICH SPI: Data transaction error\n"); - return -1; - } - - if (trans.bytesin) { - read_reg(cntlr.data, trans.in, data_length + 1); - spi_use_in(&trans, data_length); - if (with_address) - trans.offset += data_length; - } - } - -spi_xfer_exit: - /* Clear atomic preop now that xfer is done */ - writew_(0, cntlr.preop); - - return 0; -} diff --git a/src/southbridge/intel/ibexpeak/Makefile.inc b/src/southbridge/intel/ibexpeak/Makefile.inc index e7f7d99a..da9f34a 100644 --- a/src/southbridge/intel/ibexpeak/Makefile.inc +++ b/src/southbridge/intel/ibexpeak/Makefile.inc @@ -39,8 +39,8 @@ ramstage-y += ../bd82x6x/reset.c ramstage-y += ../bd82x6x/watchdog.c
ramstage-$(CONFIG_ELOG) += ../bd82x6x/elog.c -ramstage-y += spi.c -smm-$(CONFIG_SPI_FLASH_SMM) += spi.c +ramstage-y += ../common/spi.c +smm-$(CONFIG_SPI_FLASH_SMM) += ../common/spi.c
ramstage-$(CONFIG_HAVE_SMI_HANDLER) += smi.c smm-$(CONFIG_HAVE_SMI_HANDLER) += smihandler.c me.c ../bd82x6x/me_8.x.c ../bd82x6x/finalize.c ../bd82x6x/pch.c diff --git a/src/southbridge/intel/ibexpeak/spi.c b/src/southbridge/intel/ibexpeak/spi.c deleted file mode 100644 index 7080fe1..0000000 --- a/src/southbridge/intel/ibexpeak/spi.c +++ /dev/null @@ -1,1067 +0,0 @@ -/* - * Copyright (c) 2011 The Chromium OS Authors. - * Copyright (C) 2009, 2010 Carl-Daniel Hailfinger - * Copyright (C) 2011 Stefan Tauner - * - * See file CREDITS for list of people who contributed to this - * project. - * - * This program is free software; you can redistribute it and/or - * modify it under the terms of the GNU General Public License as - * published by the Free Software Foundation; either version 2 of - * the License, or (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but without any warranty; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 59 Temple Place, Suite 330, Boston, - * MA 02111-1307 USA - */ - -/* This file is derived from the flashrom project. */ -#include <stdint.h> -#include <stdlib.h> -#include <string.h> -#include <delay.h> -#include <arch/io.h> -#include <console/console.h> -#include <device/pci_ids.h> -#include <device/pci.h> -#include <spi_flash.h> - -#include <spi-generic.h> -#include "pch.h" - -#define min(a, b) ((a)<(b)?(a):(b)) - -#define HSFC_FCYCLE_OFF 1 /* 1-2: FLASH Cycle */ -#define HSFC_FCYCLE (0x3 << HSFC_FCYCLE_OFF) -#define HSFC_FDBC_OFF 8 /* 8-13: Flash Data Byte Count */ -#define HSFC_FDBC (0x3f << HSFC_FDBC_OFF) - - -#ifdef __SMM__ -#include <arch/pci_mmio_cfg.h> -#define pci_read_config_byte(dev, reg, targ)\ - *(targ) = pci_read_config8(dev, reg) -#define pci_read_config_word(dev, reg, targ)\ - *(targ) = pci_read_config16(dev, reg) -#define pci_read_config_dword(dev, reg, targ)\ - *(targ) = pci_read_config32(dev, reg) -#define pci_write_config_byte(dev, reg, val)\ - pci_write_config8(dev, reg, val) -#define pci_write_config_word(dev, reg, val)\ - pci_write_config16(dev, reg, val) -#define pci_write_config_dword(dev, reg, val)\ - pci_write_config32(dev, reg, val) -#else /* !__SMM__ */ -#include <device/device.h> -#include <device/pci.h> -#define pci_read_config_byte(dev, reg, targ)\ - *(targ) = pci_read_config8(dev, reg) -#define pci_read_config_word(dev, reg, targ)\ - *(targ) = pci_read_config16(dev, reg) -#define pci_read_config_dword(dev, reg, targ)\ - *(targ) = pci_read_config32(dev, reg) -#define pci_write_config_byte(dev, reg, val)\ - pci_write_config8(dev, reg, val) -#define pci_write_config_word(dev, reg, val)\ - pci_write_config16(dev, reg, val) -#define pci_write_config_dword(dev, reg, val)\ - pci_write_config32(dev, reg, val) -#endif /* !__SMM__ */ - -static int spi_is_multichip(void); -static struct spi_flash *spi_flash_hwseq(struct spi_slave *spi); - -typedef struct spi_slave ich_spi_slave; - -static int ichspi_lock = 0; - -typedef struct ich7_spi_regs { - uint16_t spis; - uint16_t spic; - uint32_t spia; - uint64_t spid[8]; - uint64_t _pad; - uint32_t bbar; - uint16_t preop; - uint16_t optype; - uint8_t opmenu[8]; -} __attribute__((packed)) ich7_spi_regs; - -typedef struct ich9_spi_regs { - uint32_t bfpr; - uint16_t hsfs; - uint16_t hsfc; - uint32_t faddr; - uint32_t _reserved0; - uint32_t fdata[16]; - uint32_t frap; - uint32_t freg[5]; - uint32_t _reserved1[3]; - uint32_t pr[5]; - uint32_t _reserved2[2]; - uint8_t ssfs; - uint8_t ssfc[3]; - uint16_t preop; - uint16_t optype; - uint8_t opmenu[8]; - uint32_t bbar; - uint8_t _reserved3[12]; - uint32_t fdoc; - uint32_t fdod; - uint8_t _reserved4[8]; - uint32_t afc; - uint32_t lvscc; - uint32_t uvscc; - uint8_t _reserved5[4]; - uint32_t fpb; - uint8_t _reserved6[28]; - uint32_t srdl; - uint32_t srdc; - uint32_t srd; -} __attribute__((packed)) ich9_spi_regs; - -typedef struct ich_spi_controller { - int locked; - int revision; - uint32_t flmap0; - uint32_t hsfs; - - ich9_spi_regs *ich9_spi; - uint8_t *opmenu; - int menubytes; - uint16_t *preop; - uint16_t *optype; - uint32_t *addr; - uint8_t *data; - unsigned databytes; - uint8_t *status; - uint16_t *control; - uint32_t *bbar; -} ich_spi_controller; - -static ich_spi_controller cntlr; - -enum { - SPIS_SCIP = 0x0001, - SPIS_GRANT = 0x0002, - SPIS_CDS = 0x0004, - SPIS_FCERR = 0x0008, - SSFS_AEL = 0x0010, - SPIS_LOCK = 0x8000, - SPIS_RESERVED_MASK = 0x7ff0, - SSFS_RESERVED_MASK = 0x7fe2 -}; - -enum { - SPIC_SCGO = 0x000002, - SPIC_ACS = 0x000004, - SPIC_SPOP = 0x000008, - SPIC_DBC = 0x003f00, - SPIC_DS = 0x004000, - SPIC_SME = 0x008000, - SSFC_SCF_MASK = 0x070000, - SSFC_RESERVED = 0xf80000 -}; - -enum { - HSFS_FDONE = 0x0001, - HSFS_FCERR = 0x0002, - HSFS_AEL = 0x0004, - HSFS_BERASE_MASK = 0x0018, - HSFS_BERASE_SHIFT = 3, - HSFS_SCIP = 0x0020, - HSFS_FDOPSS = 0x2000, - HSFS_FDV = 0x4000, - HSFS_FLOCKDN = 0x8000 -}; - -enum { - HSFC_FGO = 0x0001, - HSFC_FCYCLE_MASK = 0x0006, - HSFC_FCYCLE_SHIFT = 1, - HSFC_FDBC_MASK = 0x3f00, - HSFC_FDBC_SHIFT = 8, - HSFC_FSMIE = 0x8000 -}; - -enum { - SPI_OPCODE_TYPE_READ_NO_ADDRESS = 0, - SPI_OPCODE_TYPE_WRITE_NO_ADDRESS = 1, - SPI_OPCODE_TYPE_READ_WITH_ADDRESS = 2, - SPI_OPCODE_TYPE_WRITE_WITH_ADDRESS = 3 -}; - -#if CONFIG_DEBUG_SPI_FLASH - -static u8 readb_(const void *addr) -{ - u8 v = read8((unsigned long)addr); - printk(BIOS_DEBUG, "read %2.2x from %4.4x\n", - v, ((unsigned) addr & 0xffff) - 0xf020); - return v; -} - -static u16 readw_(const void *addr) -{ - u16 v = read16((unsigned long)addr); - printk(BIOS_DEBUG, "read %4.4x from %4.4x\n", - v, ((unsigned) addr & 0xffff) - 0xf020); - return v; -} - -static u32 readl_(const void *addr) -{ - u32 v = read32((unsigned long)addr); - printk(BIOS_DEBUG, "read %8.8x from %4.4x\n", - v, ((unsigned) addr & 0xffff) - 0xf020); - return v; -} - -static void writeb_(u8 b, const void *addr) -{ - write8((unsigned long)addr, b); - printk(BIOS_DEBUG, "wrote %2.2x to %4.4x\n", - b, ((unsigned) addr & 0xffff) - 0xf020); -} - -static void writew_(u16 b, const void *addr) -{ - write16((unsigned long)addr, b); - printk(BIOS_DEBUG, "wrote %4.4x to %4.4x\n", - b, ((unsigned) addr & 0xffff) - 0xf020); -} - -static void writel_(u32 b, const void *addr) -{ - write32((unsigned long)addr, b); - printk(BIOS_DEBUG, "wrote %8.8x to %4.4x\n", - b, ((unsigned) addr & 0xffff) - 0xf020); -} - -#else /* CONFIG_DEBUG_SPI_FLASH ^^^ enabled vvv NOT enabled */ - -#define readb_(a) read8((uint32_t)a) -#define readw_(a) read16((uint32_t)a) -#define readl_(a) read32((uint32_t)a) -#define writeb_(val, addr) write8((uint32_t)addr, val) -#define writew_(val, addr) write16((uint32_t)addr, val) -#define writel_(val, addr) write32((uint32_t)addr, val) - -#endif /* CONFIG_DEBUG_SPI_FLASH ^^^ NOT enabled */ - -static void write_reg(const void *value, void *dest, uint32_t size) -{ - const uint8_t *bvalue = value; - uint8_t *bdest = dest; - - while (size >= 4) { - writel_(*(const uint32_t *)bvalue, bdest); - bdest += 4; bvalue += 4; size -= 4; - } - while (size) { - writeb_(*bvalue, bdest); - bdest++; bvalue++; size--; - } -} - -static void read_reg(const void *src, void *value, uint32_t size) -{ - const uint8_t *bsrc = src; - uint8_t *bvalue = value; - - while (size >= 4) { - *(uint32_t *)bvalue = readl_(bsrc); - bsrc += 4; bvalue += 4; size -= 4; - } - while (size) { - *bvalue = readb_(bsrc); - bsrc++; bvalue++; size--; - } -} - -static void ich_set_bbar(uint32_t minaddr) -{ - const uint32_t bbar_mask = 0x00ffff00; - uint32_t ichspi_bbar; - - minaddr &= bbar_mask; - ichspi_bbar = readl_(cntlr.bbar) & ~bbar_mask; - ichspi_bbar |= minaddr; - writel_(ichspi_bbar, cntlr.bbar); -} - -int spi_cs_is_valid(unsigned int bus, unsigned int cs) -{ - printk(BIOS_DEBUG, "spi_cs_is_valid used but not implemented\n"); - return 0; -} - -struct spi_slave *spi_setup_slave(unsigned int bus, unsigned int cs, - unsigned int max_hz, unsigned int mode) -{ - ich_spi_slave *slave = malloc(sizeof(*slave)); - - if (!slave) { - printk(BIOS_DEBUG, "ICH SPI: Bad allocation\n"); - return NULL; - } - - memset(slave, 0, sizeof(*slave)); - - slave->bus = bus; - slave->cs = cs; - if (cntlr.revision == 9) { - slave->force_programmer_specific = spi_is_multichip (); - slave->programmer_specific_probe = spi_flash_hwseq; - } - return slave; -} - -/* - * Check if this device ID matches one of supported Intel PCH devices. - * - * Return the ICH version if there is a match, or zero otherwise. - */ -static inline int get_ich_version(uint16_t device_id) -{ - if (device_id == PCI_DEVICE_ID_INTEL_TGP_LPC) - return 7; - - if ((device_id >= PCI_DEVICE_ID_INTEL_COUGARPOINT_LPC_MIN && - device_id <= PCI_DEVICE_ID_INTEL_COUGARPOINT_LPC_MAX) || - (device_id >= PCI_DEVICE_ID_INTEL_PANTHERPOINT_LPC_MIN && - device_id <= PCI_DEVICE_ID_INTEL_PANTHERPOINT_LPC_MAX) - || device_id == 0x3b07) - return 9; - - return 0; -} - -void spi_init(void) -{ - int ich_version = 0; - - uint8_t *rcrb; /* Root Complex Register Block */ - uint32_t rcba; /* Root Complex Base Address */ - uint8_t bios_cntl; - device_t dev; - uint32_t ids; - uint16_t vendor_id, device_id; - -#ifdef __SMM__ - dev = PCI_DEV(0, 31, 0); -#else - dev = dev_find_slot(0, PCI_DEVFN(31, 0)); -#endif - pci_read_config_dword(dev, 0, &ids); - vendor_id = ids; - device_id = (ids >> 16); - - if (vendor_id != PCI_VENDOR_ID_INTEL) { - printk(BIOS_DEBUG, "ICH SPI: No ICH found.\n"); - return; - } - - ich_version = get_ich_version(device_id); - - if (!ich_version) { - printk(BIOS_DEBUG, "ICH SPI: No known ICH found.\n"); - return; - } - - pci_read_config_dword(dev, 0xf0, &rcba); - /* Bits 31-14 are the base address, 13-1 are reserved, 0 is enable. */ - rcrb = (uint8_t *)(rcba & 0xffffc000); - cntlr.revision = ich_version; - switch (ich_version) { - case 7: - { - const uint16_t ich7_spibar_offset = 0x3020; - ich7_spi_regs *ich7_spi = - (ich7_spi_regs *)(rcrb + ich7_spibar_offset); - - ichspi_lock = readw_(&ich7_spi->spis) & SPIS_LOCK; - cntlr.opmenu = ich7_spi->opmenu; - cntlr.menubytes = sizeof(ich7_spi->opmenu); - cntlr.optype = &ich7_spi->optype; - cntlr.addr = &ich7_spi->spia; - cntlr.data = (uint8_t *)ich7_spi->spid; - cntlr.databytes = sizeof(ich7_spi->spid); - cntlr.status = (uint8_t *)&ich7_spi->spis; - cntlr.control = &ich7_spi->spic; - cntlr.bbar = &ich7_spi->bbar; - cntlr.preop = &ich7_spi->preop; - break; - } - case 9: - { - const uint16_t ich9_spibar_offset = 0x3800; - ich9_spi_regs *ich9_spi = - (ich9_spi_regs *)(rcrb + ich9_spibar_offset); - uint16_t hsfs; - cntlr.ich9_spi = ich9_spi; - hsfs = readw_(&ich9_spi->hsfs); - ichspi_lock = hsfs & HSFS_FLOCKDN; - cntlr.hsfs = hsfs; - cntlr.opmenu = ich9_spi->opmenu; - cntlr.menubytes = sizeof(ich9_spi->opmenu); - cntlr.optype = &ich9_spi->optype; - cntlr.addr = &ich9_spi->faddr; - cntlr.data = (uint8_t *)ich9_spi->fdata; - cntlr.databytes = sizeof(ich9_spi->fdata); - cntlr.status = &ich9_spi->ssfs; - cntlr.control = (uint16_t *)ich9_spi->ssfc; - cntlr.bbar = &ich9_spi->bbar; - cntlr.preop = &ich9_spi->preop; - - if (cntlr.hsfs & HSFS_FDV) - { - writel_ (4, &ich9_spi->fdoc); - cntlr.flmap0 = readl_(&ich9_spi->fdod); - } - break; - } - default: - printk(BIOS_DEBUG, "ICH SPI: Unrecognized ICH version %d.\n", ich_version); - } - - ich_set_bbar(0); - - /* Disable the BIOS write protect so write commands are allowed. */ - pci_read_config_byte(dev, 0xdc, &bios_cntl); - switch (ich_version) { - case 9: - /* Deassert SMM BIOS Write Protect Disable. */ - bios_cntl &= ~(1 << 5); - break; - - default: - break; - } - pci_write_config_byte(dev, 0xdc, bios_cntl | 0x1); -} - -int spi_claim_bus(struct spi_slave *slave) -{ - /* Handled by ICH automatically. */ - return 0; -} - -void spi_release_bus(struct spi_slave *slave) -{ - /* Handled by ICH automatically. */ -} - -void spi_cs_activate(struct spi_slave *slave) -{ - /* Handled by ICH automatically. */ -} - -void spi_cs_deactivate(struct spi_slave *slave) -{ - /* Handled by ICH automatically. */ -} - -typedef struct spi_transaction { - const uint8_t *out; - uint32_t bytesout; - uint8_t *in; - uint32_t bytesin; - uint8_t type; - uint8_t opcode; - uint32_t offset; -} spi_transaction; - -static inline void spi_use_out(spi_transaction *trans, unsigned bytes) -{ - trans->out += bytes; - trans->bytesout -= bytes; -} - -static inline void spi_use_in(spi_transaction *trans, unsigned bytes) -{ - trans->in += bytes; - trans->bytesin -= bytes; -} - -static void spi_setup_type(spi_transaction *trans) -{ - trans->type = 0xFF; - - /* Try to guess spi type from read/write sizes. */ - if (trans->bytesin == 0) { - if (trans->bytesout > 4) - /* - * If bytesin = 0 and bytesout > 4, we presume this is - * a write data operation, which is accompanied by an - * address. - */ - trans->type = SPI_OPCODE_TYPE_WRITE_WITH_ADDRESS; - else - trans->type = SPI_OPCODE_TYPE_WRITE_NO_ADDRESS; - return; - } - - if (trans->bytesout == 1) { /* and bytesin is > 0 */ - trans->type = SPI_OPCODE_TYPE_READ_NO_ADDRESS; - return; - } - - if (trans->bytesout == 4) { /* and bytesin is > 0 */ - trans->type = SPI_OPCODE_TYPE_READ_WITH_ADDRESS; - } - - /* Fast read command is called with 5 bytes instead of 4 */ - if (trans->out[0] == SPI_OPCODE_FAST_READ && trans->bytesout == 5) { - trans->type = SPI_OPCODE_TYPE_READ_WITH_ADDRESS; - --trans->bytesout; - } -} - -static int spi_setup_opcode(spi_transaction *trans) -{ - uint16_t optypes; - uint8_t opmenu[cntlr.menubytes]; - - trans->opcode = trans->out[0]; - spi_use_out(trans, 1); - if (!ichspi_lock) { - /* The lock is off, so just use index 0. */ - writeb_(trans->opcode, cntlr.opmenu); - optypes = readw_(cntlr.optype); - optypes = (optypes & 0xfffc) | (trans->type & 0x3); - writew_(optypes, cntlr.optype); - return 0; - } else { - /* The lock is on. See if what we need is on the menu. */ - uint8_t optype; - uint16_t opcode_index; - - /* Write Enable is handled as atomic prefix */ - if (trans->opcode == SPI_OPCODE_WREN) - return 0; - - read_reg(cntlr.opmenu, opmenu, sizeof(opmenu)); - for (opcode_index = 0; opcode_index < cntlr.menubytes; - opcode_index++) { - if (opmenu[opcode_index] == trans->opcode) - break; - } - - if (opcode_index == cntlr.menubytes) { - printk(BIOS_DEBUG, "ICH SPI: Opcode %x not found\n", - trans->opcode); - return -1; - } - - optypes = readw_(cntlr.optype); - optype = (optypes >> (opcode_index * 2)) & 0x3; - if (trans->type == SPI_OPCODE_TYPE_WRITE_NO_ADDRESS && - optype == SPI_OPCODE_TYPE_WRITE_WITH_ADDRESS && - trans->bytesout >= 3) { - /* We guessed wrong earlier. Fix it up. */ - trans->type = optype; - } - if (optype != trans->type) { - printk(BIOS_DEBUG, "ICH SPI: Transaction doesn't fit type %d\n", - optype); - return -1; - } - return opcode_index; - } -} - -static int spi_setup_offset(spi_transaction *trans) -{ - /* Separate the SPI address and data. */ - switch (trans->type) { - case SPI_OPCODE_TYPE_READ_NO_ADDRESS: - case SPI_OPCODE_TYPE_WRITE_NO_ADDRESS: - return 0; - case SPI_OPCODE_TYPE_READ_WITH_ADDRESS: - case SPI_OPCODE_TYPE_WRITE_WITH_ADDRESS: - trans->offset = ((uint32_t)trans->out[0] << 16) | - ((uint32_t)trans->out[1] << 8) | - ((uint32_t)trans->out[2] << 0); - spi_use_out(trans, 3); - return 1; - default: - printk(BIOS_DEBUG, "Unrecognized SPI transaction type %#x\n", trans->type); - return -1; - } -} - -/* - * Wait for up to 60ms til status register bit(s) turn 1 (in case wait_til_set - * below is True) or 0. In case the wait was for the bit(s) to set - write - * those bits back, which would cause resetting them. - * - * Return the last read status value on success or -1 on failure. - */ -static int ich_status_poll(u16 bitmask, int wait_til_set) -{ - int timeout = 6000; /* This will result in 60 ms */ - u16 status = 0; - - while (timeout--) { - status = readw_(cntlr.status); - if (wait_til_set ^ ((status & bitmask) == 0)) { - if (wait_til_set) - writew_((status & bitmask), cntlr.status); - return status; - } - udelay(10); - } - - printk(BIOS_DEBUG, "ICH SPI: SCIP timeout, read %x, expected %x\n", - status, bitmask); - return -1; -} - -static int spi_is_multichip (void) -{ - if (cntlr.revision != 9) - return 0; - if (!(cntlr.hsfs & HSFS_FDV)) - return 0; - return !!((cntlr.flmap0 >> 8) & 3); -} - -int spi_xfer(struct spi_slave *slave, const void *dout, - unsigned int bitsout, void *din, unsigned int bitsin) -{ - uint16_t control; - int16_t opcode_index; - int with_address; - int status; - - spi_transaction trans = { - dout, bitsout / 8, - din, bitsin / 8, - 0xff, 0xff, 0 - }; - - /* There has to always at least be an opcode. */ - if (!bitsout || !dout) { - printk(BIOS_DEBUG, "ICH SPI: No opcode for transfer\n"); - return -1; - } - /* Make sure if we read something we have a place to put it. */ - if (bitsin != 0 && !din) { - printk(BIOS_DEBUG, "ICH SPI: Read but no target buffer\n"); - return -1; - } - /* Right now we don't support writing partial bytes. */ - if (bitsout % 8 || bitsin % 8) { - printk(BIOS_DEBUG, "ICH SPI: Accessing partial bytes not supported\n"); - return -1; - } - - if (ich_status_poll(SPIS_SCIP, 0) == -1) - return -1; - - writew_(SPIS_CDS | SPIS_FCERR, cntlr.status); - - spi_setup_type(&trans); - if ((opcode_index = spi_setup_opcode(&trans)) < 0) - return -1; - if ((with_address = spi_setup_offset(&trans)) < 0) - return -1; - - if (trans.opcode == SPI_OPCODE_WREN) { - /* - * Treat Write Enable as Atomic Pre-Op if possible - * in order to prevent the Management Engine from - * issuing a transaction between WREN and DATA. - */ - if (!ichspi_lock) - writew_(trans.opcode, cntlr.preop); - return 0; - } - - /* Preset control fields */ - control = SPIC_SCGO | ((opcode_index & 0x07) << 4); - - /* Issue atomic preop cycle if needed */ - if (readw_(cntlr.preop)) - control |= SPIC_ACS; - - if (!trans.bytesout && !trans.bytesin) { - /* SPI addresses are 24 bit only */ - if (with_address) - writel_(trans.offset & 0x00FFFFFF, cntlr.addr); - - /* - * This is a 'no data' command (like Write Enable), its - * bitesout size was 1, decremented to zero while executing - * spi_setup_opcode() above. Tell the chip to send the - * command. - */ - writew_(control, cntlr.control); - - /* wait for the result */ - status = ich_status_poll(SPIS_CDS | SPIS_FCERR, 1); - if (status == -1) - return -1; - - if (status & SPIS_FCERR) { - printk(BIOS_DEBUG, "ICH SPI: Command transaction error\n"); - return -1; - } - - return 0; - } - - /* - * Check if this is a write command attempting to transfer more bytes - * than the controller can handle. Iterations for writes are not - * supported here because each SPI write command needs to be preceded - * and followed by other SPI commands, and this sequence is controlled - * by the SPI chip driver. - */ - if (trans.bytesout > cntlr.databytes) { - printk(BIOS_DEBUG, "ICH SPI: Too much to write. Does your SPI chip driver use" - " CONTROLLER_PAGE_LIMIT?\n"); - return -1; - } - - /* - * Read or write up to databytes bytes at a time until everything has - * been sent. - */ - while (trans.bytesout || trans.bytesin) { - uint32_t data_length; - - /* SPI addresses are 24 bit only */ - writel_(trans.offset & 0x00FFFFFF, cntlr.addr); - - if (trans.bytesout) - data_length = min(trans.bytesout, cntlr.databytes); - else - data_length = min(trans.bytesin, cntlr.databytes); - - /* Program data into FDATA0 to N */ - if (trans.bytesout) { - write_reg(trans.out, cntlr.data, data_length); - spi_use_out(&trans, data_length); - if (with_address) - trans.offset += data_length; - } - - /* Add proper control fields' values */ - control &= ~((cntlr.databytes - 1) << 8); - control |= SPIC_DS; - control |= (data_length - 1) << 8; - - /* write it */ - writew_(control, cntlr.control); - - /* Wait for Cycle Done Status or Flash Cycle Error. */ - status = ich_status_poll(SPIS_CDS | SPIS_FCERR, 1); - if (status == -1) - return -1; - - if (status & SPIS_FCERR) { - printk(BIOS_DEBUG, "ICH SPI: Data transaction error\n"); - return -1; - } - - if (trans.bytesin) { - read_reg(cntlr.data, trans.in, data_length); - spi_use_in(&trans, data_length); - if (with_address) - trans.offset += data_length; - } - } - - /* Clear atomic preop now that xfer is done */ - writew_(0, cntlr.preop); - - return 0; -} - -/* Sets FLA in FADDR to (addr & 0x01FFFFFF) without touching other bits. */ -static void ich_hwseq_set_addr(uint32_t addr) -{ - uint32_t addr_old = readl_(&cntlr.ich9_spi->faddr) & ~0x01FFFFFF; - writel_((addr & 0x01FFFFFF) | addr_old, &cntlr.ich9_spi->faddr); -} - -/* Polls for Cycle Done Status, Flash Cycle Error or timeout in 8 us intervals. - Resets all error flags in HSFS. - Returns 0 if the cycle completes successfully without errors within - timeout us, 1 on errors. */ -static int ich_hwseq_wait_for_cycle_complete(unsigned int timeout, - unsigned int len) -{ - uint16_t hsfs; - uint32_t addr; - - timeout /= 8; /* scale timeout duration to counter */ - while ((((hsfs = readw_(&cntlr.ich9_spi->hsfs)) & - (HSFS_FDONE | HSFS_FCERR)) == 0) && - --timeout) { - udelay(8); - } - writew_(readw_(&cntlr.ich9_spi->hsfs), &cntlr.ich9_spi->hsfs); - - if (!timeout) { - uint16_t hsfc; - addr = readl_(&cntlr.ich9_spi->faddr) & 0x01FFFFFF; - hsfc = readw_(&cntlr.ich9_spi->hsfc); - printk(BIOS_ERR, "Transaction timeout between offset 0x%08x and " - "0x%08x (= 0x%08x + %d) HSFC=%x HSFS=%x!\n", - addr, addr + len - 1, addr, len - 1, - hsfc, hsfs); - return 1; - } - - if (hsfs & HSFS_FCERR) { - uint16_t hsfc; - addr = readl_(&cntlr.ich9_spi->faddr) & 0x01FFFFFF; - hsfc = readw_(&cntlr.ich9_spi->hsfc); - printk(BIOS_ERR, "Transaction error between offset 0x%08x and " - "0x%08x (= 0x%08x + %d) HSFC=%x HSFS=%x!\n", - addr, addr + len - 1, addr, len - 1, - hsfc, hsfs); - return 1; - } - return 0; -} - - -static int ich_hwseq_erase(struct spi_flash *flash, u32 offset, size_t len) -{ - u32 start, end, erase_size; - int ret; - uint16_t hsfc; - uint16_t timeout = 1000 * 60; - - erase_size = flash->sector_size; - if (offset % erase_size || len % erase_size) { - printk(BIOS_ERR, "SF: Erase offset/length not multiple of erase size\n"); - return -1; - } - - flash->spi->rw = SPI_WRITE_FLAG; - ret = spi_claim_bus(flash->spi); - if (ret) { - printk(BIOS_ERR, "SF: Unable to claim SPI bus\n"); - return ret; - } - - start = offset; - end = start + len; - - while (offset < end) { - /* make sure FDONE, FCERR, AEL are cleared by writing 1 to them */ - writew_(readw_(&cntlr.ich9_spi->hsfs), &cntlr.ich9_spi->hsfs); - - ich_hwseq_set_addr(offset); - - offset += erase_size; - - hsfc = readw_(&cntlr.ich9_spi->hsfc); - hsfc &= ~HSFC_FCYCLE; /* clear operation */ - hsfc |= (0x3 << HSFC_FCYCLE_OFF); /* set erase operation */ - hsfc |= HSFC_FGO; /* start */ - writew_(hsfc, &cntlr.ich9_spi->hsfc); - if (ich_hwseq_wait_for_cycle_complete(timeout, len)) - { - printk(BIOS_ERR, "SF: Erase failed at %x\n", offset - erase_size); - ret = -1; - goto out; - } - } - - printk(BIOS_DEBUG, "SF: Successfully erased %zu bytes @ %#x\n", len, start); - -out: - spi_release_bus(flash->spi); - return ret; -} - -static void ich_read_data(uint8_t *data, int len) -{ - int i; - uint32_t temp32 = 0; - - for (i = 0; i < len; i++) { - if ((i % 4) == 0) - temp32 = readl_(cntlr.data + i); - - data[i] = (temp32 >> ((i % 4) * 8)) & 0xff; - } -} - -static int ich_hwseq_read(struct spi_flash *flash, - u32 addr, size_t len, void *buf) -{ - uint16_t hsfc; - uint16_t timeout = 100 * 60; - uint8_t block_len; - - if (addr + len > flash->size) { - printk (BIOS_ERR, - "Attempt to read %x-%x which is out of chip\n", - (unsigned) addr, - (unsigned) addr+(unsigned) len); - return -1; - } - - /* clear FDONE, FCERR, AEL by writing 1 to them (if they are set) */ - writew_(readw_(&cntlr.ich9_spi->hsfs), &cntlr.ich9_spi->hsfs); - - while (len > 0) { - block_len = min(len, cntlr.databytes); - if (block_len > (~addr & 0xff)) - block_len = (~addr & 0xff) + 1; - ich_hwseq_set_addr(addr); - hsfc = readw_(&cntlr.ich9_spi->hsfc); - hsfc &= ~HSFC_FCYCLE; /* set read operation */ - hsfc &= ~HSFC_FDBC; /* clear byte count */ - /* set byte count */ - hsfc |= (((block_len - 1) << HSFC_FDBC_OFF) & HSFC_FDBC); - hsfc |= HSFC_FGO; /* start */ - writew_(hsfc, &cntlr.ich9_spi->hsfc); - - if (ich_hwseq_wait_for_cycle_complete(timeout, block_len)) - return 1; - ich_read_data(buf, block_len); - addr += block_len; - buf += block_len; - len -= block_len; - } - return 0; -} - -/* Fill len bytes from the data array into the fdata/spid registers. - * - * Note that using len > flash->pgm->spi.max_data_write will trash the registers - * following the data registers. - */ -static void ich_fill_data(const uint8_t *data, int len) -{ - uint32_t temp32 = 0; - int i; - - if (len <= 0) - return; - - for (i = 0; i < len; i++) { - if ((i % 4) == 0) - temp32 = 0; - - temp32 |= ((uint32_t) data[i]) << ((i % 4) * 8); - - if ((i % 4) == 3) /* 32 bits are full, write them to regs. */ - writel_(temp32, cntlr.data + (i - (i % 4))); - } - i--; - if ((i % 4) != 3) /* Write remaining data to regs. */ - writel_(temp32, cntlr.data + (i - (i % 4))); -} - -static int ich_hwseq_write(struct spi_flash *flash, - u32 addr, size_t len, const void *buf) -{ - uint16_t hsfc; - uint16_t timeout = 100 * 60; - uint8_t block_len; - uint32_t start = addr; - - if (addr + len > flash->size) { - printk (BIOS_ERR, - "Attempt to write 0x%x-0x%x which is out of chip\n", - (unsigned)addr, (unsigned) (addr+len)); - return -1; - } - - /* clear FDONE, FCERR, AEL by writing 1 to them (if they are set) */ - writew_(readw_(&cntlr.ich9_spi->hsfs), &cntlr.ich9_spi->hsfs); - - while (len > 0) { - block_len = min(len, cntlr.databytes); - if (block_len > (~addr & 0xff)) - block_len = (~addr & 0xff) + 1; - - ich_hwseq_set_addr(addr); - - ich_fill_data(buf, block_len); - hsfc = readw_(&cntlr.ich9_spi->hsfc); - hsfc &= ~HSFC_FCYCLE; /* clear operation */ - hsfc |= (0x2 << HSFC_FCYCLE_OFF); /* set write operation */ - hsfc &= ~HSFC_FDBC; /* clear byte count */ - /* set byte count */ - hsfc |= (((block_len - 1) << HSFC_FDBC_OFF) & HSFC_FDBC); - hsfc |= HSFC_FGO; /* start */ - writew_(hsfc, &cntlr.ich9_spi->hsfc); - - if (ich_hwseq_wait_for_cycle_complete(timeout, block_len)) - { - printk (BIOS_ERR, "SF: write failure at %x\n", - addr); - return -1; - } - addr += block_len; - buf += block_len; - len -= block_len; - } - printk(BIOS_DEBUG, "SF: Successfully written %u bytes @ %#x\n", - (unsigned) (addr - start), start); - return 0; -} - - -static struct spi_flash *spi_flash_hwseq(struct spi_slave *spi) -{ - struct spi_flash *flash = NULL; - uint32_t flcomp; - - flash = malloc(sizeof(*flash)); - if (!flash) { - printk(BIOS_WARNING, "SF: Failed to allocate memory\n"); - return NULL; - } - - flash->spi = spi; - flash->name = "Opaque HW-sequencing"; - - flash->write = ich_hwseq_write; - flash->erase = ich_hwseq_erase; - flash->read = ich_hwseq_read; - ich_hwseq_set_addr (0); - switch ((cntlr.hsfs >> 3) & 3) - { - case 0: - flash->sector_size = 256; - break; - case 1: - flash->sector_size = 4096; - break; - case 2: - flash->sector_size = 8192; - break; - case 3: - flash->sector_size = 65536; - break; - } - - writel_ (0x1000, &cntlr.ich9_spi->fdoc); - flcomp = readl_(&cntlr.ich9_spi->fdod); - - flash->size = 1 << (19 + (flcomp & 7)); - - if ((cntlr.hsfs & HSFS_FDV) && ((cntlr.flmap0 >> 8) & 3)) - flash->size += 1 << (19 + ((flcomp >> 3) & 7)); - printk (BIOS_DEBUG, "flash size 0x%x bytes\n", flash->size); - - return flash; -} diff --git a/src/southbridge/intel/lynxpoint/Makefile.inc b/src/southbridge/intel/lynxpoint/Makefile.inc index 7be2d03..d635b22 100644 --- a/src/southbridge/intel/lynxpoint/Makefile.inc +++ b/src/southbridge/intel/lynxpoint/Makefile.inc @@ -44,8 +44,8 @@ ramstage-y += acpi.c ramstage-$(CONFIG_ALT_CBFS_LOAD_PAYLOAD) += spi_loading.c
ramstage-$(CONFIG_ELOG) += elog.c -ramstage-y += spi.c -smm-$(CONFIG_SPI_FLASH_SMM) += spi.c +ramstage-y += ../spi.c +smm-$(CONFIG_SPI_FLASH_SMM) += ../spi.c
ramstage-$(CONFIG_HAVE_SMI_HANDLER) += smi.c pmutil.c smm-$(CONFIG_HAVE_SMI_HANDLER) += smihandler.c me_9.x.c finalize.c pch.c diff --git a/src/southbridge/intel/lynxpoint/spi.c b/src/southbridge/intel/lynxpoint/spi.c deleted file mode 100644 index 5501efc..0000000 --- a/src/southbridge/intel/lynxpoint/spi.c +++ /dev/null @@ -1,657 +0,0 @@ -/* - * Copyright (c) 2011 The Chromium OS Authors. - * - * See file CREDITS for list of people who contributed to this - * project. - * - * This program is free software; you can redistribute it and/or - * modify it under the terms of the GNU General Public License as - * published by the Free Software Foundation; either version 2 of - * the License, or (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but without any warranty; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 59 Temple Place, Suite 330, Boston, - * MA 02111-1307 USA - */ - -/* This file is derived from the flashrom project. */ -#include <stdint.h> -#include <stdlib.h> -#include <string.h> -#include <delay.h> -#include <arch/io.h> -#include <console/console.h> -#include <device/pci_ids.h> - -#include <spi-generic.h> - -#define min(a, b) ((a)<(b)?(a):(b)) - -#ifdef __SMM__ -#define pci_read_config_byte(dev, reg, targ)\ - *(targ) = pci_read_config8(dev, reg) -#define pci_read_config_word(dev, reg, targ)\ - *(targ) = pci_read_config16(dev, reg) -#define pci_read_config_dword(dev, reg, targ)\ - *(targ) = pci_read_config32(dev, reg) -#define pci_write_config_byte(dev, reg, val)\ - pci_write_config8(dev, reg, val) -#define pci_write_config_word(dev, reg, val)\ - pci_write_config16(dev, reg, val) -#define pci_write_config_dword(dev, reg, val)\ - pci_write_config32(dev, reg, val) -#else /* !__SMM__ */ -#include <device/device.h> -#include <device/pci.h> -#define pci_read_config_byte(dev, reg, targ)\ - *(targ) = pci_read_config8(dev, reg) -#define pci_read_config_word(dev, reg, targ)\ - *(targ) = pci_read_config16(dev, reg) -#define pci_read_config_dword(dev, reg, targ)\ - *(targ) = pci_read_config32(dev, reg) -#define pci_write_config_byte(dev, reg, val)\ - pci_write_config8(dev, reg, val) -#define pci_write_config_word(dev, reg, val)\ - pci_write_config16(dev, reg, val) -#define pci_write_config_dword(dev, reg, val)\ - pci_write_config32(dev, reg, val) -#endif /* !__SMM__ */ - -typedef struct spi_slave ich_spi_slave; - -static int ichspi_lock = 0; - -typedef struct ich9_spi_regs { - uint32_t bfpr; - uint16_t hsfs; - uint16_t hsfc; - uint32_t faddr; - uint32_t _reserved0; - uint32_t fdata[16]; - uint32_t frap; - uint32_t freg[5]; - uint32_t _reserved1[3]; - uint32_t pr[5]; - uint32_t _reserved2[2]; - uint8_t ssfs; - uint8_t ssfc[3]; - uint16_t preop; - uint16_t optype; - uint8_t opmenu[8]; - uint32_t bbar; - uint8_t _reserved3[12]; - uint32_t fdoc; - uint32_t fdod; - uint8_t _reserved4[8]; - uint32_t afc; - uint32_t lvscc; - uint32_t uvscc; - uint8_t _reserved5[4]; - uint32_t fpb; - uint8_t _reserved6[28]; - uint32_t srdl; - uint32_t srdc; - uint32_t srd; -} __attribute__((packed)) ich9_spi_regs; - -typedef struct ich_spi_controller { - int locked; - - uint8_t *opmenu; - int menubytes; - uint16_t *preop; - uint16_t *optype; - uint32_t *addr; - uint8_t *data; - unsigned databytes; - uint8_t *status; - uint16_t *control; - uint32_t *bbar; -} ich_spi_controller; - -static ich_spi_controller cntlr; - -enum { - SPIS_SCIP = 0x0001, - SPIS_GRANT = 0x0002, - SPIS_CDS = 0x0004, - SPIS_FCERR = 0x0008, - SSFS_AEL = 0x0010, - SPIS_LOCK = 0x8000, - SPIS_RESERVED_MASK = 0x7ff0, - SSFS_RESERVED_MASK = 0x7fe2 -}; - -enum { - SPIC_SCGO = 0x000002, - SPIC_ACS = 0x000004, - SPIC_SPOP = 0x000008, - SPIC_DBC = 0x003f00, - SPIC_DS = 0x004000, - SPIC_SME = 0x008000, - SSFC_SCF_MASK = 0x070000, - SSFC_RESERVED = 0xf80000 -}; - -enum { - HSFS_FDONE = 0x0001, - HSFS_FCERR = 0x0002, - HSFS_AEL = 0x0004, - HSFS_BERASE_MASK = 0x0018, - HSFS_BERASE_SHIFT = 3, - HSFS_SCIP = 0x0020, - HSFS_FDOPSS = 0x2000, - HSFS_FDV = 0x4000, - HSFS_FLOCKDN = 0x8000 -}; - -enum { - HSFC_FGO = 0x0001, - HSFC_FCYCLE_MASK = 0x0006, - HSFC_FCYCLE_SHIFT = 1, - HSFC_FDBC_MASK = 0x3f00, - HSFC_FDBC_SHIFT = 8, - HSFC_FSMIE = 0x8000 -}; - -enum { - SPI_OPCODE_TYPE_READ_NO_ADDRESS = 0, - SPI_OPCODE_TYPE_WRITE_NO_ADDRESS = 1, - SPI_OPCODE_TYPE_READ_WITH_ADDRESS = 2, - SPI_OPCODE_TYPE_WRITE_WITH_ADDRESS = 3 -}; - -#if CONFIG_DEBUG_SPI_FLASH - -static u8 readb_(const void *addr) -{ - u8 v = read8((unsigned long)addr); - printk(BIOS_DEBUG, "read %2.2x from %4.4x\n", - v, ((unsigned) addr & 0xffff) - 0xf020); - return v; -} - -static u16 readw_(const void *addr) -{ - u16 v = read16((unsigned long)addr); - printk(BIOS_DEBUG, "read %4.4x from %4.4x\n", - v, ((unsigned) addr & 0xffff) - 0xf020); - return v; -} - -static u32 readl_(const void *addr) -{ - u32 v = read32((unsigned long)addr); - printk(BIOS_DEBUG, "read %8.8x from %4.4x\n", - v, ((unsigned) addr & 0xffff) - 0xf020); - return v; -} - -static void writeb_(u8 b, const void *addr) -{ - write8((unsigned long)addr, b); - printk(BIOS_DEBUG, "wrote %2.2x to %4.4x\n", - b, ((unsigned) addr & 0xffff) - 0xf020); -} - -static void writew_(u16 b, const void *addr) -{ - write16((unsigned long)addr, b); - printk(BIOS_DEBUG, "wrote %4.4x to %4.4x\n", - b, ((unsigned) addr & 0xffff) - 0xf020); -} - -static void writel_(u32 b, const void *addr) -{ - write32((unsigned long)addr, b); - printk(BIOS_DEBUG, "wrote %8.8x to %4.4x\n", - b, ((unsigned) addr & 0xffff) - 0xf020); -} - -#else /* CONFIG_DEBUG_SPI_FLASH ^^^ enabled vvv NOT enabled */ - -#define readb_(a) read8((uint32_t)a) -#define readw_(a) read16((uint32_t)a) -#define readl_(a) read32((uint32_t)a) -#define writeb_(val, addr) write8((uint32_t)addr, val) -#define writew_(val, addr) write16((uint32_t)addr, val) -#define writel_(val, addr) write32((uint32_t)addr, val) - -#endif /* CONFIG_DEBUG_SPI_FLASH ^^^ NOT enabled */ - -static void write_reg(const void *value, void *dest, uint32_t size) -{ - const uint8_t *bvalue = value; - uint8_t *bdest = dest; - - while (size >= 4) { - writel_(*(const uint32_t *)bvalue, bdest); - bdest += 4; bvalue += 4; size -= 4; - } - while (size) { - writeb_(*bvalue, bdest); - bdest++; bvalue++; size--; - } -} - -static void read_reg(const void *src, void *value, uint32_t size) -{ - const uint8_t *bsrc = src; - uint8_t *bvalue = value; - - while (size >= 4) { - *(uint32_t *)bvalue = readl_(bsrc); - bsrc += 4; bvalue += 4; size -= 4; - } - while (size) { - *bvalue = readb_(bsrc); - bsrc++; bvalue++; size--; - } -} - -static void ich_set_bbar(uint32_t minaddr) -{ - const uint32_t bbar_mask = 0x00ffff00; - uint32_t ichspi_bbar; - - minaddr &= bbar_mask; - ichspi_bbar = readl_(cntlr.bbar) & ~bbar_mask; - ichspi_bbar |= minaddr; - writel_(ichspi_bbar, cntlr.bbar); -} - -int spi_cs_is_valid(unsigned int bus, unsigned int cs) -{ - printk(BIOS_DEBUG, "spi_cs_is_valid used but not implemented\n"); - return 0; -} - -struct spi_slave *spi_setup_slave(unsigned int bus, unsigned int cs, - unsigned int max_hz, unsigned int mode) -{ - ich_spi_slave *slave = malloc(sizeof(*slave)); - - if (!slave) { - printk(BIOS_DEBUG, "ICH SPI: Bad allocation\n"); - return NULL; - } - - memset(slave, 0, sizeof(*slave)); - - slave->bus = bus; - slave->cs = cs; - return slave; -} - -void spi_init(void) -{ - uint8_t *rcrb; /* Root Complex Register Block */ - uint32_t rcba; /* Root Complex Base Address */ - uint8_t bios_cntl; - device_t dev; - ich9_spi_regs *ich9_spi; - -#ifdef __SMM__ - dev = PCI_DEV(0, 31, 0); -#else - dev = dev_find_slot(0, PCI_DEVFN(31, 0)); -#endif - - pci_read_config_dword(dev, 0xf0, &rcba); - /* Bits 31-14 are the base address, 13-1 are reserved, 0 is enable. */ - rcrb = (uint8_t *)(rcba & 0xffffc000); - ich9_spi = (ich9_spi_regs *)(rcrb + 0x3800); - ichspi_lock = readw_(&ich9_spi->hsfs) & HSFS_FLOCKDN; - cntlr.opmenu = ich9_spi->opmenu; - cntlr.menubytes = sizeof(ich9_spi->opmenu); - cntlr.optype = &ich9_spi->optype; - cntlr.addr = &ich9_spi->faddr; - cntlr.data = (uint8_t *)ich9_spi->fdata; - cntlr.databytes = sizeof(ich9_spi->fdata); - cntlr.status = &ich9_spi->ssfs; - cntlr.control = (uint16_t *)ich9_spi->ssfc; - cntlr.bbar = &ich9_spi->bbar; - cntlr.preop = &ich9_spi->preop; - ich_set_bbar(0); - - /* Disable the BIOS write protect so write commands are allowed. */ - pci_read_config_byte(dev, 0xdc, &bios_cntl); - bios_cntl &= ~(1 << 5); - pci_write_config_byte(dev, 0xdc, bios_cntl | 0x1); -} - -int spi_claim_bus(struct spi_slave *slave) -{ - /* Handled by ICH automatically. */ - return 0; -} - -void spi_release_bus(struct spi_slave *slave) -{ - /* Handled by ICH automatically. */ -} - -void spi_cs_activate(struct spi_slave *slave) -{ - /* Handled by ICH automatically. */ -} - -void spi_cs_deactivate(struct spi_slave *slave) -{ - /* Handled by ICH automatically. */ -} - -typedef struct spi_transaction { - const uint8_t *out; - uint32_t bytesout; - uint8_t *in; - uint32_t bytesin; - uint8_t type; - uint8_t opcode; - uint32_t offset; -} spi_transaction; - -static inline void spi_use_out(spi_transaction *trans, unsigned bytes) -{ - trans->out += bytes; - trans->bytesout -= bytes; -} - -static inline void spi_use_in(spi_transaction *trans, unsigned bytes) -{ - trans->in += bytes; - trans->bytesin -= bytes; -} - -static void spi_setup_type(spi_transaction *trans) -{ - trans->type = 0xFF; - - /* Try to guess spi type from read/write sizes. */ - if (trans->bytesin == 0) { - if (trans->bytesout > 4) - /* - * If bytesin = 0 and bytesout > 4, we presume this is - * a write data operation, which is accompanied by an - * address. - */ - trans->type = SPI_OPCODE_TYPE_WRITE_WITH_ADDRESS; - else - trans->type = SPI_OPCODE_TYPE_WRITE_NO_ADDRESS; - return; - } - - if (trans->bytesout == 1) { /* and bytesin is > 0 */ - trans->type = SPI_OPCODE_TYPE_READ_NO_ADDRESS; - return; - } - - if (trans->bytesout == 4) { /* and bytesin is > 0 */ - trans->type = SPI_OPCODE_TYPE_READ_WITH_ADDRESS; - } - - /* Fast read command is called with 5 bytes instead of 4 */ - if (trans->out[0] == SPI_OPCODE_FAST_READ && trans->bytesout == 5) { - trans->type = SPI_OPCODE_TYPE_READ_WITH_ADDRESS; - --trans->bytesout; - } -} - -static int spi_setup_opcode(spi_transaction *trans) -{ - uint16_t optypes; - uint8_t opmenu[cntlr.menubytes]; - - trans->opcode = trans->out[0]; - spi_use_out(trans, 1); - if (!ichspi_lock) { - /* The lock is off, so just use index 0. */ - writeb_(trans->opcode, cntlr.opmenu); - optypes = readw_(cntlr.optype); - optypes = (optypes & 0xfffc) | (trans->type & 0x3); - writew_(optypes, cntlr.optype); - return 0; - } else { - /* The lock is on. See if what we need is on the menu. */ - uint8_t optype; - uint16_t opcode_index; - - /* Write Enable is handled as atomic prefix */ - if (trans->opcode == SPI_OPCODE_WREN) - return 0; - - read_reg(cntlr.opmenu, opmenu, sizeof(opmenu)); - for (opcode_index = 0; opcode_index < cntlr.menubytes; - opcode_index++) { - if (opmenu[opcode_index] == trans->opcode) - break; - } - - if (opcode_index == cntlr.menubytes) { - printk(BIOS_DEBUG, "ICH SPI: Opcode %x not found\n", - trans->opcode); - return -1; - } - - optypes = readw_(cntlr.optype); - optype = (optypes >> (opcode_index * 2)) & 0x3; - if (trans->type == SPI_OPCODE_TYPE_WRITE_NO_ADDRESS && - optype == SPI_OPCODE_TYPE_WRITE_WITH_ADDRESS && - trans->bytesout >= 3) { - /* We guessed wrong earlier. Fix it up. */ - trans->type = optype; - } - if (optype != trans->type) { - printk(BIOS_DEBUG, "ICH SPI: Transaction doesn't fit type %d\n", - optype); - return -1; - } - return opcode_index; - } -} - -static int spi_setup_offset(spi_transaction *trans) -{ - /* Separate the SPI address and data. */ - switch (trans->type) { - case SPI_OPCODE_TYPE_READ_NO_ADDRESS: - case SPI_OPCODE_TYPE_WRITE_NO_ADDRESS: - return 0; - case SPI_OPCODE_TYPE_READ_WITH_ADDRESS: - case SPI_OPCODE_TYPE_WRITE_WITH_ADDRESS: - trans->offset = ((uint32_t)trans->out[0] << 16) | - ((uint32_t)trans->out[1] << 8) | - ((uint32_t)trans->out[2] << 0); - spi_use_out(trans, 3); - return 1; - default: - printk(BIOS_DEBUG, "Unrecognized SPI transaction type %#x\n", trans->type); - return -1; - } -} - -/* - * Wait for up to 60ms til status register bit(s) turn 1 (in case wait_til_set - * below is True) or 0. In case the wait was for the bit(s) to set - write - * those bits back, which would cause resetting them. - * - * Return the last read status value on success or -1 on failure. - */ -static int ich_status_poll(u16 bitmask, int wait_til_set) -{ - int timeout = 6000; /* This will result in 60 ms */ - u16 status = 0; - - while (timeout--) { - status = readw_(cntlr.status); - if (wait_til_set ^ ((status & bitmask) == 0)) { - if (wait_til_set) - writew_((status & bitmask), cntlr.status); - return status; - } - udelay(10); - } - - printk(BIOS_DEBUG, "ICH SPI: SCIP timeout, read %x, expected %x\n", - status, bitmask); - return -1; -} - -int spi_xfer(struct spi_slave *slave, const void *dout, - unsigned int bitsout, void *din, unsigned int bitsin) -{ - uint16_t control; - int16_t opcode_index; - int with_address; - int status; - - spi_transaction trans = { - dout, bitsout / 8, - din, bitsin / 8, - 0xff, 0xff, 0 - }; - - /* There has to always at least be an opcode. */ - if (!bitsout || !dout) { - printk(BIOS_DEBUG, "ICH SPI: No opcode for transfer\n"); - return -1; - } - /* Make sure if we read something we have a place to put it. */ - if (bitsin != 0 && !din) { - printk(BIOS_DEBUG, "ICH SPI: Read but no target buffer\n"); - return -1; - } - /* Right now we don't support writing partial bytes. */ - if (bitsout % 8 || bitsin % 8) { - printk(BIOS_DEBUG, "ICH SPI: Accessing partial bytes not supported\n"); - return -1; - } - - if (ich_status_poll(SPIS_SCIP, 0) == -1) - return -1; - - writew_(SPIS_CDS | SPIS_FCERR, cntlr.status); - - spi_setup_type(&trans); - if ((opcode_index = spi_setup_opcode(&trans)) < 0) - return -1; - if ((with_address = spi_setup_offset(&trans)) < 0) - return -1; - - if (trans.opcode == SPI_OPCODE_WREN) { - /* - * Treat Write Enable as Atomic Pre-Op if possible - * in order to prevent the Management Engine from - * issuing a transaction between WREN and DATA. - */ - if (!ichspi_lock) - writew_(trans.opcode, cntlr.preop); - return 0; - } - - /* Preset control fields */ - control = SPIC_SCGO | ((opcode_index & 0x07) << 4); - - /* Issue atomic preop cycle if needed */ - if (readw_(cntlr.preop)) - control |= SPIC_ACS; - - if (!trans.bytesout && !trans.bytesin) { - /* SPI addresses are 24 bit only */ - if (with_address) - writel_(trans.offset & 0x00FFFFFF, cntlr.addr); - - /* - * This is a 'no data' command (like Write Enable), its - * bitesout size was 1, decremented to zero while executing - * spi_setup_opcode() above. Tell the chip to send the - * command. - */ - writew_(control, cntlr.control); - - /* wait for the result */ - status = ich_status_poll(SPIS_CDS | SPIS_FCERR, 1); - if (status == -1) - return -1; - - if (status & SPIS_FCERR) { - printk(BIOS_DEBUG, "ICH SPI: Command transaction error\n"); - return -1; - } - - return 0; - } - - /* - * Check if this is a write command attempting to transfer more bytes - * than the controller can handle. Iterations for writes are not - * supported here because each SPI write command needs to be preceded - * and followed by other SPI commands, and this sequence is controlled - * by the SPI chip driver. - */ - if (trans.bytesout > cntlr.databytes) { - printk(BIOS_DEBUG, "ICH SPI: Too much to write. Does your SPI chip driver use" - " CONTROLLER_PAGE_LIMIT?\n"); - return -1; - } - - /* - * Read or write up to databytes bytes at a time until everything has - * been sent. - */ - while (trans.bytesout || trans.bytesin) { - uint32_t data_length; - - /* SPI addresses are 24 bit only */ - writel_(trans.offset & 0x00FFFFFF, cntlr.addr); - - if (trans.bytesout) - data_length = min(trans.bytesout, cntlr.databytes); - else - data_length = min(trans.bytesin, cntlr.databytes); - - /* Program data into FDATA0 to N */ - if (trans.bytesout) { - write_reg(trans.out, cntlr.data, data_length); - spi_use_out(&trans, data_length); - if (with_address) - trans.offset += data_length; - } - - /* Add proper control fields' values */ - control &= ~((cntlr.databytes - 1) << 8); - control |= SPIC_DS; - control |= (data_length - 1) << 8; - - /* write it */ - writew_(control, cntlr.control); - - /* Wait for Cycle Done Status or Flash Cycle Error. */ - status = ich_status_poll(SPIS_CDS | SPIS_FCERR, 1); - if (status == -1) - return -1; - - if (status & SPIS_FCERR) { - printk(BIOS_DEBUG, "ICH SPI: Data transaction error\n"); - return -1; - } - - if (trans.bytesin) { - read_reg(cntlr.data, trans.in, data_length); - spi_use_in(&trans, data_length); - if (with_address) - trans.offset += data_length; - } - } - - /* Clear atomic preop now that xfer is done */ - writew_(0, cntlr.preop); - - return 0; -}