Patch set updated for coreboot: b904e0d sandy/ivy SPI: Support hardware sequencing and use with multiple chips
Vladimir Serbinenko (phcoder@gmail.com) just uploaded a new patch set to gerrit, which you can find at http://review.coreboot.org/4613
-gerrit
commit b904e0d113cf471150d2f5ae34da047b3143dbca Author: Vladimir Serbinenko phcoder@gmail.com Date: Sat Jan 4 21:00:38 2014 +0100
sandy/ivy SPI: Support hardware sequencing and use with multiple chips
When 2 chips are present to get to the second one you have to use hardware sequencing. Also use it as the fallback if chip is unknown.
Based on code in flashrom by Stefan Tauner and Carl-Daniel Hailfinger distributed under compatible license.
Tested on Lenovo X230 which has EN25QH64 (8M) + N25Q032..3E (4M)
Change-Id: I56f3cf0406b5f09fa327ed052c8e8b1df1d8a11f Signed-off-by: Vladimir Serbinenko phcoder@gmail.com --- src/drivers/spi/spi_flash.c | 15 ++ src/include/spi-generic.h | 2 + src/southbridge/intel/bd82x6x/spi.c | 324 ++++++++++++++++++++++++++++++++++- src/southbridge/intel/ibexpeak/spi.c | 324 ++++++++++++++++++++++++++++++++++- 4 files changed, 663 insertions(+), 2 deletions(-)
diff --git a/src/drivers/spi/spi_flash.c b/src/drivers/spi/spi_flash.c index d1a9504..ada4f3a 100644 --- a/src/drivers/spi/spi_flash.c +++ b/src/drivers/spi/spi_flash.c @@ -267,6 +267,13 @@ struct spi_flash *spi_flash_probe(unsigned int bus, unsigned int cs, goto err_claim_bus; }
+ if (spi->force_programmer_specific && spi->programmer_specific_probe) { + flash = spi->programmer_specific_probe (spi); + if (!flash) + goto err_read_id; + goto flash_detected; + } + /* Read the ID codes */ ret = spi_flash_cmd(spi, CMD_READ_ID, idcode, sizeof(idcode)); if (ret) @@ -295,11 +302,19 @@ struct spi_flash *spi_flash_probe(unsigned int bus, unsigned int cs, break; }
+ if (!flash && spi->programmer_specific_probe) { +#if CONFIG_SMM_TSEG && defined(__SMM__) + /* Need to relocate this function */ + tseg_relocate((void **)&spi->programmer_specific_probe); +#endif + flash = spi->programmer_specific_probe (spi); + } if (!flash) { printk(BIOS_WARNING, "SF: Unsupported manufacturer %02x\n", *idp); goto err_manufacturer_probe; }
+flash_detected: #if CONFIG_SMM_TSEG && defined(__SMM__) /* Ensure flash handlers are valid for TSEG */ tseg_relocate((void **)&flash->read); diff --git a/src/include/spi-generic.h b/src/include/spi-generic.h index d252c32..6cdb87a 100644 --- a/src/include/spi-generic.h +++ b/src/include/spi-generic.h @@ -64,6 +64,8 @@ struct spi_slave { unsigned int bus; unsigned int cs; unsigned int rw; + int force_programmer_specific; + struct spi_flash * (*programmer_specific_probe) (struct spi_slave *spi); };
/*----------------------------------------------------------------------- diff --git a/src/southbridge/intel/bd82x6x/spi.c b/src/southbridge/intel/bd82x6x/spi.c index ec5d7de..03d4325 100644 --- a/src/southbridge/intel/bd82x6x/spi.c +++ b/src/southbridge/intel/bd82x6x/spi.c @@ -1,5 +1,7 @@ /* * 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. @@ -28,11 +30,20 @@ #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)\ @@ -64,6 +75,9 @@ 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; @@ -115,7 +129,11 @@ typedef struct 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; @@ -299,6 +317,10 @@ struct spi_slave *spi_setup_slave(unsigned int bus, unsigned int cs,
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; }
@@ -356,6 +378,7 @@ void spi_init(void) 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: { @@ -381,7 +404,11 @@ void spi_init(void) 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; + 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; @@ -392,6 +419,12 @@ void spi_init(void) 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: @@ -591,6 +624,15 @@ static int ich_status_poll(u16 bitmask, int wait_til_set) 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) { @@ -743,3 +785,283 @@ int spi_xfer(struct spi_slave *slave, const void *dout,
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; + + 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; + } + + uint32_t flcomp; + + 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/ibexpeak/spi.c b/src/southbridge/intel/ibexpeak/spi.c index e263b7f..7955a46 100644 --- a/src/southbridge/intel/ibexpeak/spi.c +++ b/src/southbridge/intel/ibexpeak/spi.c @@ -1,5 +1,7 @@ /* * 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. @@ -28,11 +30,20 @@ #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)\ @@ -64,6 +75,9 @@ 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; @@ -115,7 +129,11 @@ typedef struct 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; @@ -299,6 +317,10 @@ struct spi_slave *spi_setup_slave(unsigned int bus, unsigned int cs,
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; }
@@ -357,6 +379,7 @@ void spi_init(void) 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: { @@ -382,7 +405,11 @@ void spi_init(void) 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; + 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; @@ -393,6 +420,12 @@ void spi_init(void) 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: @@ -592,6 +625,15 @@ static int ich_status_poll(u16 bitmask, int wait_til_set) 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) { @@ -744,3 +786,283 @@ int spi_xfer(struct spi_slave *slave, const void *dout,
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; + + 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; + } + + uint32_t flcomp; + + 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; +}
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Vladimir Serbinenko