Patch set updated for coreboot: dfc202f [RFC] drivers: Import generic MMC handler from uboot
Alexandru Gagniuc (mr.nuke.me@gmail.com) just uploaded a new patch set to gerrit, which you can find at http://review.coreboot.org/4631
-gerrit
commit dfc202f02e7c0da76c5886c5e1b7821bbd8fdf76 Author: Alexandru Gagniuc mr.nuke.me@gmail.com Date: Sat Dec 28 15:06:15 2013 -0500
[RFC] drivers: Import generic MMC handler from uboot
Aye and behold, the wonderful world of MMC and SD cards. This is the MMC handler imported from uboot and adjusted for coreboot use. There are over 100 micro-commits to refactor and clean up the ubootian style, so there is no sense in saying what uboot revision this came from (yeah, Paul, I'm looking at you).
Let's be honest. This code is a clusterfuck in a coreboot-flavored candy coating. There's probably so much more work to do, that I didn't bother cleaning up the comments. I need a general direction on this. How do we even start bringing this up to coreboot standards? We'll need this for the Allwinner ports.
There's also the SoC specific MMC driver, but that one is not included here. I want to get a perspective from someone who's never had to endure the pains of uboot code.
Change-Id: Ied5ac5701d2fe8338fd92477110d6f74a4295371 Signed-off-by: Alexandru Gagniuc mr.nuke.me@gmail.com --- src/Kconfig | 7 + src/drivers/Kconfig | 1 + src/drivers/Makefile.inc | 1 + src/drivers/mmc/Kconfig | 15 + src/drivers/mmc/Makefile.inc | 3 + src/drivers/mmc/mmc.c | 1255 ++++++++++++++++++++++++++++++++++++++++++ src/drivers/mmc/mmc.h | 388 +++++++++++++ src/include/types.h | 7 + 8 files changed, 1677 insertions(+)
diff --git a/src/Kconfig b/src/Kconfig index 88df9ae..19ac1cf 100644 --- a/src/Kconfig +++ b/src/Kconfig @@ -721,6 +721,13 @@ config DEBUG_CBFS help This option enables additional CBFS related debug messages.
+config DEBUG_MMC + bool "Output verbose MMC/SD card debug messages" + default n + depends on DRIVER_MMC + help + This option enables additional MMC related debug messages. + config HAVE_DEBUG_RAM_SETUP def_bool n
diff --git a/src/drivers/Kconfig b/src/drivers/Kconfig index 8da7b05..7f1356a 100644 --- a/src/drivers/Kconfig +++ b/src/drivers/Kconfig @@ -27,6 +27,7 @@ source src/drivers/ics/Kconfig source src/drivers/intel/Kconfig source src/drivers/ipmi/Kconfig source src/drivers/maxim/Kconfig +source src/drivers/mmc/Kconfig source src/drivers/oxford/Kconfig source src/drivers/parade/Kconfig if PC80_SYSTEM diff --git a/src/drivers/Makefile.inc b/src/drivers/Makefile.inc index 34ae62e..9241aaf 100644 --- a/src/drivers/Makefile.inc +++ b/src/drivers/Makefile.inc @@ -24,6 +24,7 @@ subdirs-y += generic subdirs-y += i2c subdirs-y += intel subdirs-y += maxim +subdirs-y += mmc subdirs-y += oxford subdirs-y += parade subdirs-y += realtek diff --git a/src/drivers/mmc/Kconfig b/src/drivers/mmc/Kconfig new file mode 100644 index 0000000..25a4cd9 --- /dev/null +++ b/src/drivers/mmc/Kconfig @@ -0,0 +1,15 @@ +config DRIVER_MMC + bool + default n + help + Generic MMC and SD card driver + +if DRIVER_MMC + +config DRIVER_MMC_BOOTBLOCK + bool + default n + help + Include MMC driver in the bootblock. + +endif # DRIVER_MMC diff --git a/src/drivers/mmc/Makefile.inc b/src/drivers/mmc/Makefile.inc new file mode 100644 index 0000000..4eee879 --- /dev/null +++ b/src/drivers/mmc/Makefile.inc @@ -0,0 +1,3 @@ +bootblock-$(CONFIG_DRIVER_MMC_BOOTBLOCK) += mmc.c +romstage-$(CONFIG_DRIVER_MMC) += mmc.c +ramstage-$(CONFIG_DRIVER_MMC) += mmc.c diff --git a/src/drivers/mmc/mmc.c b/src/drivers/mmc/mmc.c new file mode 100644 index 0000000..cb1c427 --- /dev/null +++ b/src/drivers/mmc/mmc.c @@ -0,0 +1,1255 @@ +/* + * MMC and SD card access code + * + * Based on sunxi/uboot code, which in turn is based (loosely) on the Linux code + * + * Copyright (C) 2008,2010 Freescale Semiconductor, Inc + * written by Andy Fleming + * Copyright (C) 2013 Alexandru Gagniuc mr.nuke.me@gmail.com + * Subject to the GNU GPL v2, or (at your option) any later version. + */ + +#ifndef _MMC_PRIVATE_H_ +#define _MMC_PRIVATE_H_ + +#include <drivers/mmc/mmc.h> + +#include <arch/byteorder.h> +#include <stdlib.h> +#include <console/console.h> +#include <delay.h> + +#define ERROR(x...) printk(BIOS_ERR, "[mmc] " x) +#define LOG(x...) printk(BIOS_INFO, "[mmc] " x) +#if CONFIG_DEBUG_MMC +#define DEBUG(x...) printk(BIOS_DEBUG, "[mmc] " x) +#define SPEW(x...) printk(BIOS_SPEW, "[mmc] " x) +#else +#define DEBUG(x...) +#define SPEW(x...) +#endif + +/* FIXME: Global MMC is a bad idea */ +static struct mmc *g_mmc = 0; + +extern enum cb_err mmc_send_cmd(struct mmc *mmc, struct mmc_cmd *cmd, + struct mmc_data *data); +extern enum cb_err mmc_send_status(struct mmc *mmc, int timeout); +extern enum cb_err mmc_set_blocklen(struct mmc *mmc, int len); + +#endif /* _MMC_PRIVATE_H_ */ + +/* Set block count limit because of 16 bit register limit on some hardware*/ +#ifndef CONFIG_SYS_MMC_MAX_BLK_COUNT +#define CONFIG_SYS_MMC_MAX_BLK_COUNT 65535 +#endif + +////static struct list_head mmc_devices; +static int cur_dev_num = -1; + +/* FIXME: __weak */ +static int board_mmc_getwp(struct mmc *mmc) +{ + return -1; +} + +int mmc_getwp(struct mmc *mmc) +{ + int wp; + + wp = board_mmc_getwp(mmc); + + if (wp < 0) { + if (mmc->getwp) + wp = mmc->getwp(mmc); + else + wp = 0; + } + + return wp; +} + +static int __board_mmc_getcd(struct mmc *mmc) +{ + return -1; +} + +enum cb_err board_mmc_getcd(struct mmc *mmc) __attribute__ ((weak, + alias + ("__board_mmc_getcd"))); + +enum cb_err mmc_send_cmd(struct mmc *mmc, struct mmc_cmd *cmd, + struct mmc_data *data) +{ + enum cb_err ret; + + DEBUG("Send command: %i\targ: 0x%08x\n", cmd->cmdidx, cmd->cmdarg); + ret = mmc->send_cmd(mmc, cmd, data); + +#ifdef CONFIG_DEBUG_MMC + int i; + u8 *ptr; + + + switch (cmd->resp_type) { + case MMC_RSP_NONE: + SPEW("\tMMC_RSP_NONE\n"); + break; + case MMC_RSP_R1: + SPEW("\tMMC_RSP_R1,5,6,7 \t 0x%08x\n", cmd->response[0]); + break; + case MMC_RSP_R1b: + SPEW("\tMMC_RSP_R1b\t 0x%08x\n", cmd->response[0]); + break; + case MMC_RSP_R2: + SPEW("\tMMC_RSP_R2\t0x%08x\n", cmd->response[0]); + SPEW("\t \t0x%08x\n", cmd->response[1]); + SPEW("\t \t0x%08x\n", cmd->response[2]); + SPEW("\t \t0x%08x\n", cmd->response[3]); + SPEW("\t\tDUMPING DATA\n"); + for (i = 0; i < 4; i++) { + ptr = (u8 *) & cmd->response[i]; + SPEW("\t\t%03d - %02x %02x %02x %02x\n", i * 4, + ptr[3], ptr[2], ptr[1], ptr[0]); + } + break; + case MMC_RSP_R3: + SPEW("\tMMC_RSP_R3,4\t0x%08X \n", cmd->response[0]); + break; + default: + SPEW("\tERROR MMC rsp not supported\n"); + break; + } +#endif + return ret; +} + +enum cb_err mmc_send_status(struct mmc *mmc, int timeout) +{ + struct mmc_cmd cmd; + enum cb_err err; + int retries = 5; + + cmd.cmdidx = MMC_CMD_SEND_STATUS; + cmd.resp_type = MMC_RSP_R1; + if (!mmc_host_is_spi(mmc)) + cmd.cmdarg = mmc->rca << 16; + + do { + err = mmc_send_cmd(mmc, &cmd, NULL); + if (!err) { + if ((cmd.response[0] & MMC_STATUS_RDY_FOR_DATA) && + (cmd.response[0] & MMC_STATUS_CURR_STATE) != + MMC_STATE_PRG) + break; + else if (cmd.response[0] & MMC_STATUS_MASK) { + LOG("Status Error: 0x%08X\n", cmd.response[0]); + return CB_MMC_COMM_ERROR; + } + } else if (--retries < 0) + return err; + + udelay(1000); + + } while (timeout--); + + DEBUG("CURR STATE:%d\n", (cmd.response[0] & MMC_STATUS_CURR_STATE) >> 9); + + if (timeout <= 0) { + LOG("Timeout waiting card ready\n"); + return CB_MMC_TIMEOUT; + } + + return CB_SUCCESS; +} + +enum cb_err mmc_set_blocklen(struct mmc *mmc, int len) +{ + struct mmc_cmd cmd; + + cmd.cmdidx = MMC_CMD_SET_BLOCKLEN; + cmd.resp_type = MMC_RSP_R1; + cmd.cmdarg = len; + + return mmc_send_cmd(mmc, &cmd, NULL); +} + +struct mmc *find_mmc_device(int dev_num) +{ + /* FIXME */ + return g_mmc; + + + DEBUG("MMC Device %d not found\n", dev_num); + + return NULL; +} + +static enum cb_err mmc_read_blocks(struct mmc *mmc, void *dst, lbaint_t start, + lbaint_t blkcnt) +{ + struct mmc_cmd cmd; + struct mmc_data data; + + if (blkcnt > 1) + cmd.cmdidx = MMC_CMD_READ_MULTIPLE_BLOCK; + else + cmd.cmdidx = MMC_CMD_READ_SINGLE_BLOCK; + + if (mmc->high_capacity) + cmd.cmdarg = start; + else + cmd.cmdarg = start * mmc->read_bl_len; + + cmd.resp_type = MMC_RSP_R1; + + data.dest = dst; + data.blocks = blkcnt; + data.blocksize = mmc->read_bl_len; + data.flags = MMC_DATA_READ; + + if (mmc_send_cmd(mmc, &cmd, &data)) + return 0; + + if (blkcnt > 1) { + cmd.cmdidx = MMC_CMD_STOP_TRANSMISSION; + cmd.cmdarg = 0; + cmd.resp_type = MMC_RSP_R1b; + if (mmc_send_cmd(mmc, &cmd, NULL)) { + LOG("mmc fail to send stop cmd\n"); + return 0; + } + } + + return blkcnt; +} + +static u32 mmc_bread(int dev_num, lbaint_t start, lbaint_t blkcnt, void *dst) +{ + lbaint_t cur, blocks_todo = blkcnt; + + print_debug("MMC bread, no butter\n"); + if (blkcnt == 0) + return CB_SUCCESS; + + struct mmc *mmc = find_mmc_device(dev_num); + if (!mmc) + return 0; + + if ((start + blkcnt) > mmc->block_dev.lba) { + return 0; + } + + if (mmc_set_blocklen(mmc, mmc->read_bl_len)) + return 0; + + DEBUG("MMC blocklen %x\n", mmc->read_bl_len); + + do { + cur = (blocks_todo > mmc->b_max) ? mmc->b_max : blocks_todo; + if (mmc_read_blocks(mmc, dst, start, cur) != cur) + return 0; + blocks_todo -= cur; + start += cur; + dst += cur * mmc->read_bl_len; + } while (blocks_todo > 0); + + return blkcnt; +} + +static enum cb_err mmc_go_idle(struct mmc *mmc) +{ + struct mmc_cmd cmd; + enum cb_err err; + + udelay(1000); + + cmd.cmdidx = MMC_CMD_GO_IDLE_STATE; + cmd.cmdarg = 0; + cmd.resp_type = MMC_RSP_NONE; + + err = mmc_send_cmd(mmc, &cmd, NULL); + + if (err != CB_SUCCESS) + return err; + + udelay(2000); + + return 0; +} + +static enum cb_err mmc_app_cmd(struct mmc *mmc, u32 arg) +{ + struct mmc_cmd cmd; + cmd.cmdidx = MMC_CMD_APP_CMD; + cmd.resp_type = MMC_RSP_R1; + cmd.cmdarg = arg; + + return mmc_send_cmd(mmc, &cmd, NULL); +} + +static int sd_send_op_cond(struct mmc *mmc) +{ + int timeout = 1000; + enum cb_err err; + struct mmc_cmd cmd; + + do { + + if ((err = mmc_app_cmd(mmc, 0)) != CB_SUCCESS) + return err; + + cmd.cmdidx = SD_CMD_APP_SEND_OP_COND; + cmd.resp_type = MMC_RSP_R3; + + /* + * Most cards do not answer if some reserved bits + * in the ocr are set. However, Some controller + * can set bit 7 (reserved for low voltages), but + * how to manage low voltages SD card is not yet + * specified. + */ + cmd.cmdarg = mmc_host_is_spi(mmc) ? 0 : + (mmc->voltages & 0xff8000); + cmd.cmdarg |= (mmc->version == SD_VERSION_2) ? OCR_HCS : 0; + + if ((err = mmc_send_cmd(mmc, &cmd, NULL)) != CB_SUCCESS) + return err; + + udelay(1000); + } while ((!(cmd.response[0] & OCR_BUSY)) && timeout--); + + if (timeout <= 0) + return CB_MMC_UNUSABLE; + + if (mmc->version != SD_VERSION_2) + mmc->version = SD_VERSION_1_0; + + if (mmc_host_is_spi(mmc)) { /* read OCR for spi */ + cmd.cmdidx = MMC_CMD_SPI_READ_OCR; + cmd.resp_type = MMC_RSP_R3; + cmd.cmdarg = 0; + + err = mmc_send_cmd(mmc, &cmd, NULL); + + if (err != CB_SUCCESS) + return err; + } + + mmc->ocr = cmd.response[0]; + + mmc->high_capacity = ((mmc->ocr & OCR_HCS) == OCR_HCS); + mmc->rca = 0; + + return 0; +} + +/* We pass in the cmd since otherwise the init seems to fail */ +static enum cb_err mmc_send_op_cond_iter(struct mmc *mmc, struct mmc_cmd *cmd, + int use_arg) +{ + enum cb_err err; + + cmd->cmdidx = MMC_CMD_SEND_OP_COND; + cmd->resp_type = MMC_RSP_R3; + cmd->cmdarg = 0; + if (use_arg && !mmc_host_is_spi(mmc)) { + cmd->cmdarg = + (mmc->voltages & + (mmc->op_cond_response & OCR_VOLTAGE_MASK)) | + (mmc->op_cond_response & OCR_ACCESS_MODE); + + if (mmc->host_caps & MMC_MODE_HC) + cmd->cmdarg |= OCR_HCS; + } + err = mmc_send_cmd(mmc, cmd, NULL); + if (err != CB_SUCCESS) + return err; + mmc->op_cond_response = cmd->response[0]; + return 0; +} + +static enum cb_err mmc_send_op_cond(struct mmc *mmc) +{ + struct mmc_cmd cmd; + enum cb_err err; + int i; + + /* Some cards seem to need this */ + mmc_go_idle(mmc); + + /* Asking to the card its capabilities */ + mmc->op_cond_pending = 1; + for (i = 0; i < 2; i++) { + err = mmc_send_op_cond_iter(mmc, &cmd, i != 0); + if (err != CB_SUCCESS) + return err; + + /* exit if not busy (flag seems to be inverted) */ + if (mmc->op_cond_response & OCR_BUSY) + return CB_SUCCESS; + } + return CB_MMC_IN_PROGRESS; +} + +static enum cb_err mmc_complete_op_cond(struct mmc *mmc) +{ + struct mmc_cmd cmd; + int timeout = 1000; + u32 start = 0; + enum cb_err err; + + mmc->op_cond_pending = 0; + /* FIXME *///start = get_timer(0); + do { + err = mmc_send_op_cond_iter(mmc, &cmd, 1); + if (err != CB_SUCCESS) + return err; + if ( /* FIXME *//*get_timer(start) */ start > timeout) + return CB_MMC_UNUSABLE; + udelay(100); + } while (!(mmc->op_cond_response & OCR_BUSY)); + + if (mmc_host_is_spi(mmc)) { /* read OCR for spi */ + cmd.cmdidx = MMC_CMD_SPI_READ_OCR; + cmd.resp_type = MMC_RSP_R3; + cmd.cmdarg = 0; + + err = mmc_send_cmd(mmc, &cmd, NULL); + + if (err != CB_SUCCESS) + return err; + } + + mmc->version = MMC_VERSION_UNKNOWN; + mmc->ocr = cmd.response[0]; + + mmc->high_capacity = ((mmc->ocr & OCR_HCS) == OCR_HCS); + mmc->rca = 0; + + return CB_SUCCESS; +} + +static int mmc_send_ext_csd(struct mmc *mmc, u8 *ext_csd) +{ + struct mmc_cmd cmd; + struct mmc_data data; + + /* Get the Card Status Register */ + cmd.cmdidx = MMC_CMD_SEND_EXT_CSD; + cmd.resp_type = MMC_RSP_R1; + cmd.cmdarg = 0; + + data.dest = ext_csd; + data.blocks = 1; + data.blocksize = MMC_MAX_BLOCK_LEN; + data.flags = MMC_DATA_READ; + + return mmc_send_cmd(mmc, &cmd, &data); +} + +static int mmc_switch(struct mmc *mmc, u8 set, u8 index, u8 value) +{ + struct mmc_cmd cmd; + int timeout = 1000; + int ret; + + cmd.cmdidx = MMC_CMD_SWITCH; + cmd.resp_type = MMC_RSP_R1b; + cmd.cmdarg = (MMC_SWITCH_MODE_WRITE_BYTE << 24) | + (index << 16) | (value << 8); + + ret = mmc_send_cmd(mmc, &cmd, NULL); + + /* Waiting for the ready status */ + if (!ret) + ret = mmc_send_status(mmc, timeout); + + return ret; + +} + +#define MAX_BLOCK_LEN 0x100 +static enum cb_err mmc_change_freq(struct mmc *mmc) +{ + //ALLOC_CACHE_ALIGN_BUFFER(u8, ext_csd, MMC_MAX_BLOCK_LEN); + u8 ext_csd[MAX_BLOCK_LEN]; + + u8 cardtype; + enum cb_err err; + + mmc->card_caps = 0; + + if (mmc_host_is_spi(mmc)) + return 0; + + /* Only version 4 supports high-speed */ + if (mmc->version < MMC_VERSION_4) + return 0; + + err = mmc_send_ext_csd(mmc, ext_csd); + + if (err != CB_SUCCESS) + return err; + + cardtype = ext_csd[EXT_CSD_CARD_TYPE] & 0xf; + + err = mmc_switch(mmc, EXT_CSD_CMD_SET_NORMAL, EXT_CSD_HS_TIMING, 1); + + if (err != CB_SUCCESS) + return err; + + /* Now check to see that it worked */ + err = mmc_send_ext_csd(mmc, ext_csd); + + if (err != CB_SUCCESS) + return err; + + /* No high-speed support */ + if (!ext_csd[EXT_CSD_HS_TIMING]) + return CB_SUCCESS; + + /* High Speed is set, there are two types: 52MHz and 26MHz */ + if (cardtype & MMC_HS_52MHZ) + mmc->card_caps |= MMC_MODE_HS_52MHz | MMC_MODE_HS; + else + mmc->card_caps |= MMC_MODE_HS; + + return CB_SUCCESS; +} + +static enum cb_err mmc_set_capacity(struct mmc *mmc, int part_num) +{ + switch (part_num) { + case 0: + mmc->capacity = mmc->capacity_user; + break; + case 1: + case 2: + mmc->capacity = mmc->capacity_boot; + break; + case 3: + mmc->capacity = mmc->capacity_rpmb; + break; + case 4: + case 5: + case 6: + case 7: + mmc->capacity = mmc->capacity_gp[part_num - 4]; + break; + default: + return CB_ERR; + } + + //mmc->block_dev.lba = lldiv(mmc->capacity, mmc->read_bl_len); + mmc->block_dev.lba = mmc->capacity / mmc->read_bl_len; + + return 0; +} + +enum cb_err mmc_switch_part(int dev_num, unsigned int part_num) +{ + struct mmc *mmc = find_mmc_device(dev_num); + int ret; + + if (!mmc) + return -1; + + ret = mmc_switch(mmc, EXT_CSD_CMD_SET_NORMAL, EXT_CSD_PART_CONF, + (mmc->part_config & ~PART_ACCESS_MASK) + | (part_num & PART_ACCESS_MASK)); + if (ret) + return ret; + + return mmc_set_capacity(mmc, part_num); +} + +enum cb_err mmc_getcd(struct mmc *mmc) +{ + int cd; + + cd = board_mmc_getcd(mmc); + + if (cd < 0) { + if (mmc->getcd) + cd = mmc->getcd(mmc); + else + cd = 1; + } + + return cd; +} + +static enum cb_err sd_switch(struct mmc *mmc, int mode, int group, u8 value, + u8 * resp) +{ + struct mmc_cmd cmd; + struct mmc_data data; + + /* Switch the frequency */ + cmd.cmdidx = SD_CMD_SWITCH_FUNC; + cmd.resp_type = MMC_RSP_R1; + cmd.cmdarg = (mode << 31) | 0xffffff; + cmd.cmdarg &= ~(0xf << (group * 4)); + cmd.cmdarg |= value << (group * 4); + + data.dest = resp; + data.blocksize = 64; + data.blocks = 1; + data.flags = MMC_DATA_READ; + + return mmc_send_cmd(mmc, &cmd, &data); +} + +static enum cb_err sd_change_freq(struct mmc *mmc) +{ + enum cb_err err; + struct mmc_cmd cmd; + //ALLOC_CACHE_ALIGN_BUFFER(u32, scr, 2); + u32 scr[2]; + //ALLOC_CACHE_ALIGN_BUFFER(u32, switch_status, 16); + u32 switch_status[16]; + struct mmc_data data; + int timeout; + + mmc->card_caps = 0; + + if (mmc_host_is_spi(mmc)) + return 0; + + /* Read the SCR to find out if this card supports higher speeds */ + if ((err = mmc_app_cmd(mmc, (mmc->rca << 16))) != CB_SUCCESS) + return err; + + cmd.cmdidx = SD_CMD_APP_SEND_SCR; + cmd.resp_type = MMC_RSP_R1; + cmd.cmdarg = 0; + + timeout = 3; + + retry_scr: + /* FIXME: Possible endianess violation (u32* -> u8*) */ + data.dest = (u8 *) scr; + data.blocksize = 8; + data.blocks = 1; + data.flags = MMC_DATA_READ; + + err = mmc_send_cmd(mmc, &cmd, &data); + + if (err != CB_SUCCESS) { + if (timeout--) + goto retry_scr; + + return err; + } + + mmc->scr[0] = be32_to_cpu(scr[0]); + mmc->scr[1] = be32_to_cpu(scr[1]); + + switch ((mmc->scr[0] >> 24) & 0xf) { + case 0: + mmc->version = SD_VERSION_1_0; + break; + case 1: + mmc->version = SD_VERSION_1_10; + break; + case 2: + mmc->version = SD_VERSION_2; + if ((mmc->scr[0] >> 15) & 0x1) + mmc->version = SD_VERSION_3; + break; + default: + mmc->version = SD_VERSION_1_0; + break; + } + + if (mmc->scr[0] & SD_DATA_4BIT) + mmc->card_caps |= MMC_MODE_4BIT; + + /* Version 1.0 doesn't support switching */ + if (mmc->version == SD_VERSION_1_0) + return 0; + + timeout = 4; + while (timeout--) { + err = sd_switch(mmc, SD_SWITCH_CHECK, 0, 1, + (u8 *) switch_status); + + if (err != CB_SUCCESS) + return err; + + /* The high-speed function is busy. Try again */ + if (!(be32_to_cpu(switch_status[7]) & SD_HIGHSPEED_BUSY)) + break; + } + + /* If high-speed isn't supported, we return */ + if (!(be32_to_cpu(switch_status[3]) & SD_HIGHSPEED_SUPPORTED)) + return 0; + + /* + * If the host doesn't support SD_HIGHSPEED, do not switch card to + * HIGHSPEED mode even if the card support SD_HIGHSPPED. + * This can avoid furthur problem when the card runs in different + * mode between the host. + */ + if (!((mmc->host_caps & MMC_MODE_HS_52MHz) && + (mmc->host_caps & MMC_MODE_HS))) + return 0; + + err = sd_switch(mmc, SD_SWITCH_SWITCH, 0, 1, (u8 *) switch_status); + + if (err != CB_SUCCESS) + return err; + + if ((be32_to_cpu(switch_status[4]) & 0x0f000000) == 0x01000000) + mmc->card_caps |= MMC_MODE_HS; + + return 0; +} + +/* frequency bases */ +/* divided by 10 to be nice to platforms without floating point */ +static const int fbase[] = { + 10000, + 100000, + 1000000, + 10000000, +}; + +/* Multiplier values for TRAN_SPEED. Multiplied by 10 to be nice + * to platforms without floating point. + */ +static const int multipliers[] = { + 0, /* reserved */ + 10, + 12, + 13, + 15, + 20, + 25, + 30, + 35, + 40, + 45, + 50, + 55, + 60, + 70, + 80, +}; + +static void mmc_set_ios(struct mmc *mmc) +{ + mmc->set_ios(mmc); +} + +void mmc_set_clock(struct mmc *mmc, u32 clock) +{ + if (clock > mmc->f_max) + clock = mmc->f_max; + + if (clock < mmc->f_min) + clock = mmc->f_min; + + mmc->clock = clock; + + mmc_set_ios(mmc); +} + +static void mmc_set_bus_width(struct mmc *mmc, u32 width) +{ + mmc->bus_width = width; + + mmc_set_ios(mmc); +} + +#include <string.h> +static enum cb_err mmc_startup(struct mmc *mmc) +{ + enum cb_err err; + int i; + u32 mult, freq; + u64 cmult, csize, capacity; + struct mmc_cmd cmd; + //ALLOC_CACHE_ALIGN_BUFFER(u8, ext_csd, MMC_MAX_BLOCK_LEN); + u8 ext_csd[MAX_BLOCK_LEN]; + //ALLOC_CACHE_ALIGN_BUFFER(u8, test_csd, MMC_MAX_BLOCK_LEN); + u8 test_csd[MAX_BLOCK_LEN]; + int timeout = 1000; + + if (mmc_host_is_spi(mmc)) { /* enable CRC check for spi */ + cmd.cmdidx = MMC_CMD_SPI_CRC_ON_OFF; + cmd.resp_type = MMC_RSP_R1; + cmd.cmdarg = 1; + err = mmc_send_cmd(mmc, &cmd, NULL); + + if (err != CB_SUCCESS) + return err; + } + + /* Put the Card in Identify Mode */ + cmd.cmdidx = mmc_host_is_spi(mmc) ? MMC_CMD_SEND_CID : MMC_CMD_ALL_SEND_CID; /* cmd not supported in spi */ + cmd.resp_type = MMC_RSP_R2; + cmd.cmdarg = 0; + + err = mmc_send_cmd(mmc, &cmd, NULL); + + if (err != CB_SUCCESS) + return err; + + memcpy(mmc->cid, cmd.response, 16); + + /* + * For MMC cards, set the Relative Address. + * For SD cards, get the Relatvie Address. + * This also puts the cards into Standby State + */ + if (!mmc_host_is_spi(mmc)) { /* cmd not supported in spi */ + cmd.cmdidx = SD_CMD_SEND_RELATIVE_ADDR; + cmd.cmdarg = mmc->rca << 16; + cmd.resp_type = MMC_RSP_R6; + + err = mmc_send_cmd(mmc, &cmd, NULL); + + if (err != CB_SUCCESS) + return err; + + if (IS_SD(mmc)) + mmc->rca = (cmd.response[0] >> 16) & 0xffff; + } + + /* Get the Card-Specific Data */ + cmd.cmdidx = MMC_CMD_SEND_CSD; + cmd.resp_type = MMC_RSP_R2; + cmd.cmdarg = mmc->rca << 16; + + err = mmc_send_cmd(mmc, &cmd, NULL); + + /* Waiting for the ready status */ + mmc_send_status(mmc, timeout); + + if (err != CB_SUCCESS) + return err; + + mmc->csd[0] = cmd.response[0]; + mmc->csd[1] = cmd.response[1]; + mmc->csd[2] = cmd.response[2]; + mmc->csd[3] = cmd.response[3]; + + if (mmc->version == MMC_VERSION_UNKNOWN) { + int version = (cmd.response[0] >> 26) & 0xf; + + switch (version) { + case 0: + mmc->version = MMC_VERSION_1_2; + break; + case 1: + mmc->version = MMC_VERSION_1_4; + break; + case 2: + mmc->version = MMC_VERSION_2_2; + break; + case 3: + mmc->version = MMC_VERSION_3; + break; + case 4: + mmc->version = MMC_VERSION_4; + break; + default: + mmc->version = MMC_VERSION_1_2; + break; + } + } + + /* divide frequency by 10, since the mults are 10x bigger */ + freq = fbase[(cmd.response[0] & 0x7)]; + mult = multipliers[((cmd.response[0] >> 3) & 0xf)]; + + mmc->tran_speed = freq * mult; + + mmc->read_bl_len = 1 << ((cmd.response[1] >> 16) & 0xf); + + if (IS_SD(mmc)) + mmc->write_bl_len = mmc->read_bl_len; + else + mmc->write_bl_len = 1 << ((cmd.response[3] >> 22) & 0xf); + + if (mmc->high_capacity) { + csize = (mmc->csd[1] & 0x3f) << 16 + | (mmc->csd[2] & 0xffff0000) >> 16; + cmult = 8; + } else { + csize = (mmc->csd[1] & 0x3ff) << 2 + | (mmc->csd[2] & 0xc0000000) >> 30; + cmult = (mmc->csd[2] & 0x00038000) >> 15; + } + + mmc->capacity_user = (csize + 1) << (cmult + 2); + mmc->capacity_user *= mmc->read_bl_len; + mmc->capacity_boot = 0; + mmc->capacity_rpmb = 0; + for (i = 0; i < 4; i++) + mmc->capacity_gp[i] = 0; + + if (mmc->read_bl_len > MMC_MAX_BLOCK_LEN) + mmc->read_bl_len = MMC_MAX_BLOCK_LEN; + + if (mmc->write_bl_len > MMC_MAX_BLOCK_LEN) + mmc->write_bl_len = MMC_MAX_BLOCK_LEN; + + /* Select the card, and put it into Transfer Mode */ + if (!mmc_host_is_spi(mmc)) { /* cmd not supported in spi */ + cmd.cmdidx = MMC_CMD_SELECT_CARD; + cmd.resp_type = MMC_RSP_R1; + cmd.cmdarg = mmc->rca << 16; + err = mmc_send_cmd(mmc, &cmd, NULL); + + if (err != CB_SUCCESS) + return err; + } + + /* + * For SD, its erase group is always one sector + */ + mmc->erase_grp_size = 1; + mmc->part_config = MMCPART_NOAVAILABLE; + if (!IS_SD(mmc) && (mmc->version >= MMC_VERSION_4)) { + /* check ext_csd version and capacity */ + err = mmc_send_ext_csd(mmc, ext_csd); + if (!err && (ext_csd[EXT_CSD_REV] >= 2)) { + /* + * According to the JEDEC Standard, the value of + * ext_csd's capacity is valid if the value is more + * than 2GB + */ + capacity = ext_csd[EXT_CSD_SEC_CNT] << 0 + | ext_csd[EXT_CSD_SEC_CNT + 1] << 8 + | ext_csd[EXT_CSD_SEC_CNT + 2] << 16 + | ext_csd[EXT_CSD_SEC_CNT + 3] << 24; + capacity *= MMC_MAX_BLOCK_LEN; + if ((capacity >> 20) > 2 * 1024) + mmc->capacity_user = capacity; + } + + switch (ext_csd[EXT_CSD_REV]) { + case 1: + mmc->version = MMC_VERSION_4_1; + break; + case 2: + mmc->version = MMC_VERSION_4_2; + break; + case 3: + mmc->version = MMC_VERSION_4_3; + break; + case 5: + mmc->version = MMC_VERSION_4_41; + break; + case 6: + mmc->version = MMC_VERSION_4_5; + break; + } + + /* + * Host needs to enable ERASE_GRP_DEF bit if device is + * partitioned. This bit will be lost every time after a reset + * or power off. This will affect erase size. + */ + if ((ext_csd[EXT_CSD_PARTITIONING_SUPPORT] & PART_SUPPORT) && + (ext_csd[EXT_CSD_PARTITIONS_ATTRIBUTE] & PART_ENH_ATTRIB)) { + err = mmc_switch(mmc, EXT_CSD_CMD_SET_NORMAL, + EXT_CSD_ERASE_GROUP_DEF, 1); + + if (err != CB_SUCCESS) + return err; + + /* Read out group size from ext_csd */ + mmc->erase_grp_size = + ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE] * + MMC_MAX_BLOCK_LEN * 1024; + } else { + /* Calculate the group size from the csd value. */ + int erase_gsz, erase_gmul; + erase_gsz = (mmc->csd[2] & 0x00007c00) >> 10; + erase_gmul = (mmc->csd[2] & 0x000003e0) >> 5; + mmc->erase_grp_size = (erase_gsz + 1) + * (erase_gmul + 1); + } + + /* store the partition info of emmc */ + if ((ext_csd[EXT_CSD_PARTITIONING_SUPPORT] & PART_SUPPORT) || + ext_csd[EXT_CSD_BOOT_MULT]) + mmc->part_config = ext_csd[EXT_CSD_PART_CONF]; + + mmc->capacity_boot = ext_csd[EXT_CSD_BOOT_MULT] << 17; + + mmc->capacity_rpmb = ext_csd[EXT_CSD_RPMB_MULT] << 17; + + for (i = 0; i < 4; i++) { + int idx = EXT_CSD_GP_SIZE_MULT + i * 3; + mmc->capacity_gp[i] = (ext_csd[idx + 2] << 16) + + (ext_csd[idx + 1] << 8) + ext_csd[idx]; + mmc->capacity_gp[i] *= + ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE]; + mmc->capacity_gp[i] *= ext_csd[EXT_CSD_HC_WP_GRP_SIZE]; + } + } + + err = mmc_set_capacity(mmc, mmc->part_num); + if (err != CB_SUCCESS) + return err; + + if (IS_SD(mmc)) + err = sd_change_freq(mmc); + else + err = mmc_change_freq(mmc); + + if (err != CB_SUCCESS) + return err; + + /* Restrict card's capabilities by what the host can do */ + mmc->card_caps &= mmc->host_caps; + + if (IS_SD(mmc)) { + if (mmc->card_caps & MMC_MODE_4BIT) { + err = mmc_app_cmd(mmc, (mmc->rca << 16)); + if (err != CB_SUCCESS) + return err; + + cmd.cmdidx = SD_CMD_APP_SET_BUS_WIDTH; + cmd.resp_type = MMC_RSP_R1; + cmd.cmdarg = 2; + err = mmc_send_cmd(mmc, &cmd, NULL); + if (err != CB_SUCCESS) + return err; + + mmc_set_bus_width(mmc, 4); + } + + if (mmc->card_caps & MMC_MODE_HS) + mmc->tran_speed = 50000000; + else + mmc->tran_speed = 25000000; + } else { + int idx; + + /* An array of possible bus widths in order of preference */ + static unsigned ext_csd_bits[] = { + EXT_CSD_BUS_WIDTH_8, + EXT_CSD_BUS_WIDTH_4, + EXT_CSD_BUS_WIDTH_1, + }; + + /* An array to map CSD bus widths to host cap bits */ + static unsigned ext_to_hostcaps[] = { + [EXT_CSD_BUS_WIDTH_4] = MMC_MODE_4BIT, + [EXT_CSD_BUS_WIDTH_8] = MMC_MODE_8BIT, + }; + + /* An array to map chosen bus width to an integer */ + static unsigned widths[] = { + 8, 4, 1, + }; + + for (idx = 0; idx < ARRAY_SIZE(ext_csd_bits); idx++) { + unsigned int extw = ext_csd_bits[idx]; + + /* + * Check to make sure the controller supports + * this bus width, if it's more than 1 + */ + if (extw != EXT_CSD_BUS_WIDTH_1 && + !(mmc->host_caps & ext_to_hostcaps[extw])) + continue; + + err = mmc_switch(mmc, EXT_CSD_CMD_SET_NORMAL, + EXT_CSD_BUS_WIDTH, extw); + + if (err != CB_SUCCESS) + continue; + + mmc_set_bus_width(mmc, widths[idx]); + + err = mmc_send_ext_csd(mmc, test_csd); + if (!err && ext_csd[EXT_CSD_PARTITIONING_SUPPORT] + == test_csd[EXT_CSD_PARTITIONING_SUPPORT] + && ext_csd[EXT_CSD_ERASE_GROUP_DEF] + == test_csd[EXT_CSD_ERASE_GROUP_DEF] + && ext_csd[EXT_CSD_REV] + == test_csd[EXT_CSD_REV] + && ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE] + == test_csd[EXT_CSD_HC_ERASE_GRP_SIZE] + && memcmp(&ext_csd[EXT_CSD_SEC_CNT], + &test_csd[EXT_CSD_SEC_CNT], 4) == 0) { + + mmc->card_caps |= ext_to_hostcaps[extw]; + break; + } + } + + if (mmc->card_caps & MMC_MODE_HS) { + if (mmc->card_caps & MMC_MODE_HS_52MHz) + mmc->tran_speed = 52000000; + else + mmc->tran_speed = 26000000; + } + } + + mmc_set_clock(mmc, mmc->tran_speed); + + /* fill in device description */ + mmc->block_dev.lun = 0; + mmc->block_dev.type = 0; + mmc->block_dev.blksz = mmc->read_bl_len; + /* FIXME *///mmc->block_dev.log2blksz = LOG2(mmc->block_dev.blksz); + //mmc->block_dev.lba = lldiv(mmc->capacity, mmc->read_bl_len); + mmc->block_dev.lba = mmc->capacity / mmc->read_bl_len; + mmc->block_dev.vendor[0] = 0; + mmc->block_dev.product[0] = 0; + mmc->block_dev.revision[0] = 0; + return 0; +} + +static enum cb_err sd_send_if_cond(struct mmc *mmc) +{ + struct mmc_cmd cmd; + enum cb_err err; + + DEBUG("Sending SD SEND_IF_COND\n"); + cmd.cmdidx = SD_CMD_SEND_IF_COND; + /* We set the bit if the host supports voltages between 2.7 and 3.6 V */ + cmd.cmdarg = ((mmc->voltages & 0xff8000) != 0) << 8 | 0xaa; + cmd.resp_type = MMC_RSP_R7; + + err = mmc_send_cmd(mmc, &cmd, NULL); + + if (err != CB_SUCCESS) + return err; + + if ((cmd.response[0] & 0xff) != 0xaa) + return CB_MMC_UNUSABLE; + else + mmc->version = SD_VERSION_2; + + return 0; +} + +enum cb_err mmc_register(struct mmc *mmc) +{ + /* Setup the universal parts of the block interface just once */ + /////mmc->block_dev.if_type = IF_TYPE_MMC; + mmc->block_dev.dev = cur_dev_num++; + mmc->block_dev.removable = 1; + mmc->block_dev.block_read = mmc_bread; + mmc->block_dev.block_write = NULL; //mmc_bwrite; + mmc->block_dev.block_erase = NULL; //mmc_berase; + if (!mmc->b_max) + mmc->b_max = CONFIG_SYS_MMC_MAX_BLK_COUNT; + + g_mmc = mmc; + ////INIT_LIST_HEAD (&mmc->link); + + ////list_add_tail (&mmc->link, &mmc_devices); + + return 0; +} + +enum cb_err mmc_start_init(struct mmc *mmc) +{ + enum cb_err err; + + if (mmc_getcd(mmc) == 0) { + mmc->init_completed = 0; + LOG("MMC: no card present\n"); + return CB_MMC_NO_CARD; + } + + if (mmc->init_completed) + return CB_SUCCESS; + + err = mmc->init(mmc); + + if (err != CB_SUCCESS) + return err; + + mmc_set_bus_width(mmc, 1); + mmc_set_clock(mmc, 1); + + /* Reset the Card */ + if ((err = mmc_go_idle(mmc)) != CB_SUCCESS) + return err; + + /* The internal partition reset to user partition(0) at every CMD0 */ + mmc->part_num = 0; + + /* Test for SD version 2 */ + err = sd_send_if_cond(mmc); + + /* Now try to get the SD card's operating condition */ + err = sd_send_op_cond(mmc); + + /* If the command timed out, we check for an MMC card */ + if (err == CB_MMC_TIMEOUT) { + err = mmc_send_op_cond(mmc); + + if (err && err != CB_MMC_IN_PROGRESS) { + LOG("Card did not respond to voltage select!\n"); + return CB_MMC_UNUSABLE; + } + } + + if (err == CB_MMC_IN_PROGRESS) + mmc->init_in_progress = 1; + + return err; +} + +static enum cb_err mmc_complete_init(struct mmc *mmc) +{ + enum cb_err err = CB_SUCCESS; + + if (mmc->op_cond_pending) + err = mmc_complete_op_cond(mmc); + + if (!err) + err = mmc_startup(mmc); + + mmc->init_completed = (err != CB_SUCCESS) ? 0 : 1; + mmc->init_in_progress = 0; + return err; +} + +enum cb_err mmc_init(struct mmc *mmc) +{ + enum cb_err err = CB_MMC_IN_PROGRESS; + ////unsigned start = 0;////get_timer(0); + + if (mmc->init_completed) + return 0; + if (!mmc->init_in_progress) + err = mmc_start_init(mmc); + + if (!err || err == CB_MMC_IN_PROGRESS) + err = mmc_complete_init(mmc); + LOG("%s: %d, time %lu\n", __func__, err, 0L /*get_timer(start) */ ); + return err; +} + +/* + * CPU and board-specific MMC initializations. Aliased function + * signals caller to move on + */ + +void print_mmc_devices(char separator) +{ +} + +enum cb_err get_mmc_num(void) +{ + return cur_dev_num; +} + +void mmc_set_preinit(struct mmc *mmc, int preinit) +{ + mmc->preinit = preinit; +} diff --git a/src/drivers/mmc/mmc.h b/src/drivers/mmc/mmc.h new file mode 100644 index 0000000..8fd73c4 --- /dev/null +++ b/src/drivers/mmc/mmc.h @@ -0,0 +1,388 @@ +/* + * MMC definitions + * + * Based on sunxi/uboot code, which in turn is based (loosely) on the Linux code + * + * Copyright (C) 2008,2010 Freescale Semiconductor, Inc + * written by Andy Fleming + * Copyright (C) 2013 Alexandru Gagniuc mr.nuke.me@gmail.com + * Subject to the GNU GPL v2, or (at your option) any later version. + */ + +#ifndef DRIVERS_MMC_MMC_H +#define DRIVERS_MMC_MMC_H + +#include <types.h> + +#define lbaint_t u32 + +typedef struct block_dev_desc { + int if_type; /* type of the interface */ + int dev; /* device number */ + u8 part_type; /* partition type */ + u8 target; /* target SCSI ID */ + u8 lun; /* target LUN */ + u8 type; /* device type */ + u8 removable; /* removable device */ +#ifdef CONFIG_LBA48 + u8 lba48; /* device can use 48bit addr (ATA/ATAPI v7) */ +#endif + lbaint_t lba; /* number of blocks */ + u32 blksz; /* block size */ + int log2blksz; /* for convenience: log2(blksz) */ + char vendor[40 + 1]; /* IDE model, SCSI Vendor */ + char product[20 + 1]; /* IDE Serial no, SCSI product */ + char revision[8 + 1]; /* firmware revision */ + u32(*block_read) (int dev, + lbaint_t start, lbaint_t blkcnt, void *buffer); + u32(*block_write) (int dev, + lbaint_t start, + lbaint_t blkcnt, const void *buffer); + u32(*block_erase) (int dev, lbaint_t start, lbaint_t blkcnt); + void *priv; /* driver private struct pointer */ +} block_dev_desc_t; + +enum sd_version { + SD_VERSION_SD = 0x20000, + SD_VERSION_3 = (SD_VERSION_SD | 0x300), + SD_VERSION_2 = (SD_VERSION_SD | 0x200), + SD_VERSION_1_0 = (SD_VERSION_SD | 0x100), + SD_VERSION_1_10 = (SD_VERSION_SD | 0x10a), +}; + +enum mmc_version { + MMC_VERSION_MMC = 0x10000, + MMC_VERSION_UNKNOWN = (MMC_VERSION_MMC), + MMC_VERSION_1_2 = (MMC_VERSION_MMC | 0x102), + MMC_VERSION_1_4 = (MMC_VERSION_MMC | 0x104), + MMC_VERSION_2_2 = (MMC_VERSION_MMC | 0x202), + MMC_VERSION_3 = (MMC_VERSION_MMC | 0x300), + MMC_VERSION_4 = (MMC_VERSION_MMC | 0x400), + MMC_VERSION_4_1 = (MMC_VERSION_MMC | 0x401), + MMC_VERSION_4_2 = (MMC_VERSION_MMC | 0x402), + MMC_VERSION_4_3 = (MMC_VERSION_MMC | 0x403), + MMC_VERSION_4_41 = (MMC_VERSION_MMC | 0x429), + MMC_VERSION_4_5 = (MMC_VERSION_MMC | 0x405), +}; + +enum mmc_mode { + MMC_MODE_HS = 0x001, + MMC_MODE_HS_52MHz = 0x010, + MMC_MODE_4BIT = 0x100, + MMC_MODE_8BIT = 0x200, + MMC_MODE_SPI = 0x400, + MMC_MODE_HC = 0x800, +}; + +#define MMC_MODE_MASK_WIDTH_BITS (MMC_MODE_4BIT | MMC_MODE_8BIT) +#define MMC_MODE_WIDTH_BITS_SHIFT 8 + +#define SD_DATA_4BIT 0x00040000 + +#define IS_SD(x) (x->version & SD_VERSION_SD) + +#define MMC_DATA_READ 1 +#define MMC_DATA_WRITE 2 + +enum mmc_command { + MMC_CMD_GO_IDLE_STATE = 0, + MMC_CMD_SEND_OP_COND = 1, + MMC_CMD_ALL_SEND_CID = 2, + MMC_CMD_SET_RELATIVE_ADDR = 3, + MMC_CMD_SET_DSR = 4, + MMC_CMD_SWITCH = 6, + MMC_CMD_SELECT_CARD = 7, + MMC_CMD_SEND_EXT_CSD = 8, + MMC_CMD_SEND_CSD = 9, + MMC_CMD_SEND_CID = 10, + MMC_CMD_STOP_TRANSMISSION = 12, + MMC_CMD_SEND_STATUS = 13, + MMC_CMD_SET_BLOCKLEN = 16, + MMC_CMD_READ_SINGLE_BLOCK = 17, + MMC_CMD_READ_MULTIPLE_BLOCK = 18, + MMC_CMD_WRITE_SINGLE_BLOCK = 24, + MMC_CMD_WRITE_MULTIPLE_BLOCK = 25, + MMC_CMD_ERASE_GROUP_START = 35, + MMC_CMD_ERASE_GROUP_END = 36, + MMC_CMD_ERASE = 38, + MMC_CMD_APP_CMD = 55, + MMC_CMD_SPI_READ_OCR = 58, + MMC_CMD_SPI_CRC_ON_OFF = 59, + MMC_CMD_RES_MAN = 62, +}; + +#define MMC_CMD62_ARG1 0xefac62ec +#define MMC_CMD62_ARG2 0xcbaea7 + +enum sd_command { + SD_CMD_SEND_RELATIVE_ADDR = 3, + SD_CMD_SWITCH_FUNC = 6, + SD_CMD_SEND_IF_COND = 8, + + SD_CMD_APP_SET_BUS_WIDTH = 6, + SD_CMD_ERASE_WR_BLK_START = 32, + SD_CMD_ERASE_WR_BLK_END = 33, + SD_CMD_APP_SEND_OP_COND = 41, + SD_CMD_APP_SEND_SCR = 51, +}; + +/* SCR definitions in different words */ +#define SD_HIGHSPEED_BUSY 0x00020000 +#define SD_HIGHSPEED_SUPPORTED 0x00020000 + +#define MMC_HS_TIMING 0x00000100 +#define MMC_HS_52MHZ 0x2 + +#define OCR_BUSY 0x80000000 +#define OCR_HCS 0x40000000 +#define OCR_VOLTAGE_MASK 0x007FFF80 +#define OCR_ACCESS_MODE 0x60000000 + +#define SECURE_ERASE 0x80000000 + +#define MMC_STATUS_MASK (~0x0206BF7F) +#define MMC_STATUS_RDY_FOR_DATA (1 << 8) +#define MMC_STATUS_CURR_STATE (0xf << 9) +#define MMC_STATUS_ERROR (1 << 19) + +#define MMC_STATE_PRG (7 << 9) + +enum mmc_vdd { + MMC_VDD_165_195 = 0x00000080, /* VDD voltage 1.65 - 1.95 */ + MMC_VDD_20_21 = 0x00000100, /* VDD voltage 2.0 ~ 2.1 */ + MMC_VDD_21_22 = 0x00000200, /* VDD voltage 2.1 ~ 2.2 */ + MMC_VDD_22_23 = 0x00000400, /* VDD voltage 2.2 ~ 2.3 */ + MMC_VDD_23_24 = 0x00000800, /* VDD voltage 2.3 ~ 2.4 */ + MMC_VDD_24_25 = 0x00001000, /* VDD voltage 2.4 ~ 2.5 */ + MMC_VDD_25_26 = 0x00002000, /* VDD voltage 2.5 ~ 2.6 */ + MMC_VDD_26_27 = 0x00004000, /* VDD voltage 2.6 ~ 2.7 */ + MMC_VDD_27_28 = 0x00008000, /* VDD voltage 2.7 ~ 2.8 */ + MMC_VDD_28_29 = 0x00010000, /* VDD voltage 2.8 ~ 2.9 */ + MMC_VDD_29_30 = 0x00020000, /* VDD voltage 2.9 ~ 3.0 */ + MMC_VDD_30_31 = 0x00040000, /* VDD voltage 3.0 ~ 3.1 */ + MMC_VDD_31_32 = 0x00080000, /* VDD voltage 3.1 ~ 3.2 */ + MMC_VDD_32_33 = 0x00100000, /* VDD voltage 3.2 ~ 3.3 */ + MMC_VDD_33_34 = 0x00200000, /* VDD voltage 3.3 ~ 3.4 */ + MMC_VDD_34_35 = 0x00400000, /* VDD voltage 3.4 ~ 3.5 */ + MMC_VDD_35_36 = 0x00800000, /* VDD voltage 3.5 ~ 3.6 */ +}; + +#define MMC_SWITCH_MODE_CMD_SET 0x00 /* Change the command set */ +#define MMC_SWITCH_MODE_SET_BITS 0x01 /* Set bits in EXT_CSD byte + addressed by index which are + 1 in value field */ +#define MMC_SWITCH_MODE_CLEAR_BITS 0x02 /* Clear bits in EXT_CSD byte + addressed by index, which are + 1 in value field */ +#define MMC_SWITCH_MODE_WRITE_BYTE 0x03 /* Set target byte to value */ + +#define SD_SWITCH_CHECK 0 +#define SD_SWITCH_SWITCH 1 + +/* + * EXT_CSD fields + */ +#define EXT_CSD_GP_SIZE_MULT 143 /* R/W */ +#define EXT_CSD_PARTITIONS_ATTRIBUTE 156 /* R/W */ +#define EXT_CSD_PARTITIONING_SUPPORT 160 /* RO */ +#define EXT_CSD_RPMB_MULT 168 /* RO */ +#define EXT_CSD_ERASE_GROUP_DEF 175 /* R/W */ +#define EXT_CSD_BOOT_BUS_WIDTH 177 +#define EXT_CSD_PART_CONF 179 /* R/W */ +#define EXT_CSD_BUS_WIDTH 183 /* R/W */ +#define EXT_CSD_HS_TIMING 185 /* R/W */ +#define EXT_CSD_REV 192 /* RO */ +#define EXT_CSD_CARD_TYPE 196 /* RO */ +#define EXT_CSD_SEC_CNT 212 /* RO, 4 bytes */ +#define EXT_CSD_HC_WP_GRP_SIZE 221 /* RO */ +#define EXT_CSD_HC_ERASE_GRP_SIZE 224 /* RO */ +#define EXT_CSD_BOOT_MULT 226 /* RO */ + +/* + * EXT_CSD field definitions + */ + +#define EXT_CSD_CMD_SET_NORMAL (1 << 0) +#define EXT_CSD_CMD_SET_SECURE (1 << 1) +#define EXT_CSD_CMD_SET_CPSECURE (1 << 2) + +#define EXT_CSD_CARD_TYPE_26 (1 << 0) /* Card can run at 26MHz */ +#define EXT_CSD_CARD_TYPE_52 (1 << 1) /* Card can run at 52MHz */ + +#define EXT_CSD_BUS_WIDTH_1 0 /* Card is in 1 bit mode */ +#define EXT_CSD_BUS_WIDTH_4 1 /* Card is in 4 bit mode */ +#define EXT_CSD_BUS_WIDTH_8 2 /* Card is in 8 bit mode */ + +#define EXT_CSD_BOOT_ACK_ENABLE (1 << 6) +#define EXT_CSD_BOOT_PARTITION_ENABLE (1 << 3) +#define EXT_CSD_PARTITION_ACCESS_ENABLE (1 << 0) +#define EXT_CSD_PARTITION_ACCESS_DISABLE (0 << 0) + +#define EXT_CSD_BOOT_ACK(x) (x << 6) +#define EXT_CSD_BOOT_PART_NUM(x) (x << 3) +#define EXT_CSD_PARTITION_ACCESS(x) (x << 0) + +#define R1_ILLEGAL_COMMAND (1 << 22) +#define R1_APP_CMD (1 << 5) + +enum mmc_response_type { + MMC_RSP_PRESENT = 1 << 0, + MMC_RSP_136 = 1 << 1, /* 136 bit response */ + MMC_RSP_CRC = 1 << 2, /* expect valid crc */ + MMC_RSP_BUSY = 1 << 3, /* card may send busy */ + MMC_RSP_OPCODE = 1 << 4, /* response contains opcode */ + + MMC_RSP_NONE = 0, + MMC_RSP_R1 = MMC_RSP_PRESENT | MMC_RSP_CRC | MMC_RSP_OPCODE, + MMC_RSP_R1b = + MMC_RSP_PRESENT | MMC_RSP_CRC | MMC_RSP_OPCODE | MMC_RSP_BUSY, + MMC_RSP_R2 = MMC_RSP_PRESENT | MMC_RSP_136 | MMC_RSP_CRC, + MMC_RSP_R3 = MMC_RSP_PRESENT, + MMC_RSP_R4 = MMC_RSP_PRESENT, + MMC_RSP_R5 = MMC_RSP_PRESENT | MMC_RSP_CRC | MMC_RSP_OPCODE, + MMC_RSP_R6 = MMC_RSP_PRESENT | MMC_RSP_CRC | MMC_RSP_OPCODE, + MMC_RSP_R7 = MMC_RSP_PRESENT | MMC_RSP_CRC | MMC_RSP_OPCODE, +}; + +#define MMCPART_NOAVAILABLE (0xff) +#define PART_ACCESS_MASK (0x7) +#define PART_SUPPORT (0x1) +#define PART_ENH_ATTRIB (0x1f) + +/* Maximum block size for MMC */ +#define MMC_MAX_BLOCK_LEN 512 + +/* The number of MMC physical partitions. These consist of: + * boot partitions (2), general purpose partitions (4) in MMC v4.4. + */ +#define MMC_NUM_BOOT_PARTITION 2 + +struct mmc_cid { + u32 psn; + unsigned short oid; + u8 mid; + u8 prv; + u8 mdt; + char pnm[7]; +}; + +struct mmc_cmd { + u16 cmdidx; + u32 resp_type; + u32 cmdarg; + u32 response[4]; +}; + +struct mmc_data { + union { + u8 *dest; + const u8 *src; /* src buffers don't get written to */ + }; + u32 flags; + u32 blocks; + u32 blocksize; +}; + +struct mmc { + /* FIXME: */ + //struct list_head link; + char name[32]; + void *priv; + u32 voltages; + u32 version; + int init_completed; + u32 f_min; + u32 f_max; + int high_capacity; + u32 bus_width; + u32 clock; + u32 card_caps; + u32 host_caps; + u32 ocr; + u32 scr[2]; + u32 csd[4]; + u32 cid[4]; + u16 rca; + char part_config; + char part_num; + u32 tran_speed; + u32 read_bl_len; + u32 write_bl_len; + u32 erase_grp_size; + u64 capacity; + u64 capacity_user; + u64 capacity_boot; + u64 capacity_rpmb; + u64 capacity_gp[4]; + /* FIXME: */ + block_dev_desc_t block_dev; + int (*send_cmd) (struct mmc * mmc, + struct mmc_cmd * cmd, struct mmc_data * data); + void (*set_ios) (struct mmc * mmc); + int (*init) (struct mmc * mmc); + int (*getcd) (struct mmc * mmc); + int (*getwp) (struct mmc * mmc); + u32 b_max; + u8 op_cond_pending; /* 1 if we are waiting on an op_cond command */ + u8 init_in_progress; /* 1 if we have done mmc_start_init() */ + u8 preinit; /* start init as early as possible */ + u32 op_cond_response; /* the response byte from the last op_cond */ +}; + +enum cb_err mmc_register(struct mmc *mmc); +/* FIXME: */ +//int mmc_initialize(bd_t *bis); +enum cb_err mmc_init(struct mmc *mmc); +enum cb_err mmc_read(struct mmc *mmc, u64 src, u8 * dst, int size); +void mmc_set_clock(struct mmc *mmc, u32 clock); +struct mmc *find_mmc_device(int dev_num); +enum cb_err mmc_set_dev(int dev_num); +void print_mmc_devices(char separator); +enum cb_err get_mmc_num(void); +enum cb_err board_mmc_getcd(struct mmc *mmc); +enum cb_err mmc_switch_part(int dev_num, unsigned int part_num); +enum cb_err mmc_getcd(struct mmc *mmc); +int mmc_getwp(struct mmc *mmc); +void spl_mmc_load(void); //__noreturn; +/* Function to change the size of boot partition and rpmb partitions */ +int mmc_boot_partition_size_change(struct mmc *mmc, u32 bootsize, u32 rpmbsize); +/* Function to send commands to open/close the specified boot partition */ +int mmc_boot_part_access(struct mmc *mmc, u8 ack, u8 part_num, u8 access); + +/** + * Start device initialization and return immediately; it does not block on + * polling OCR (operation condition register) status. Then you should call + * mmc_init, which would block on polling OCR status and complete the device + * initializatin. + * + * @param mmc Pointer to a MMC device struct + * @return 0 on success, IN_PROGRESS on waiting for OCR status, <0 on error. + */ +enum cb_err mmc_start_init(struct mmc *mmc); + +/** + * Set preinit flag of mmc device. + * + * This will cause the device to be pre-inited during mmc_initialize(), + * which may save boot time if the device is not accessed until later. + * Some eMMC devices take 200-300ms to init, but unfortunately they + * must be sent a series of commands to even get them to start preparing + * for operation. + * + * @param mmc Pointer to a MMC device struct + * @param preinit preinit flag value + */ +void mmc_set_preinit(struct mmc *mmc, int preinit); + +static inline int mmc_host_is_spi(struct mmc *mmc) +{ + return mmc->host_caps & MMC_MODE_SPI; +} + +#ifdef CONFIG_GENERIC_MMC +struct mmc *mmc_spi_init(u32 bus, u32 cs, u32 speed, u32 mode); +#else +int mmc_legacy_init(int verbose); +#endif + +#endif /* DRIVERS_MMC_MMC_H */ diff --git a/src/include/types.h b/src/include/types.h index d1f991e..d572fd4 100644 --- a/src/include/types.h +++ b/src/include/types.h @@ -41,6 +41,13 @@ enum cb_err { CB_CMOS_OPTION_NOT_FOUND = -102, /**< Option string not found */ CB_CMOS_ACCESS_ERROR = -103, /**< CMOS access error */ CB_CMOS_CHECKSUM_INVALID = -104, /**< CMOS checksum is invalid */ + + /* MMC/SD card errors */ + CB_MMC_NO_CARD = -200, /* No SD/MMC card inserted */ + CB_MMC_UNUSABLE = -201, /* Unusable Card */ + CB_MMC_COMM_ERROR = -202, /* Communications Error */ + CB_MMC_TIMEOUT = -203, + CB_MMC_IN_PROGRESS = -204, /* operation is in progress */ };
#endif /* __TYPES_H */
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Alexandru Gagniuc