For SPL builds this is just dead code since we'll only need to read. Eliminating it results in a significant size reduction for the SPL binary, which may be critical for certain platforms where the binary size is highly constrained.
Signed-off-by: Paul Burton paul.burton@imgtec.com --- Changes in v2: - Move the mmc_bwrite & mmc_berase functions to a new mmc_write.c file which is only compiled for non-SPL builds, as per a request from Pantelis Antoniou. This requires that a few formerly static functions in mmc.c be accessible to the new file, so they are declared in a new mmc_private.h header along with the write & erase functions. For what it's worth I prefered v1, but hey ho. --- drivers/mmc/Makefile | 2 + drivers/mmc/mmc.c | 186 +-------------------------------------------- drivers/mmc/mmc_private.h | 45 +++++++++++ drivers/mmc/mmc_write.c | 189 ++++++++++++++++++++++++++++++++++++++++++++++ 4 files changed, 240 insertions(+), 182 deletions(-) create mode 100644 drivers/mmc/mmc_private.h create mode 100644 drivers/mmc/mmc_write.c
diff --git a/drivers/mmc/Makefile b/drivers/mmc/Makefile index bedf833..06280d1 100644 --- a/drivers/mmc/Makefile +++ b/drivers/mmc/Makefile @@ -34,6 +34,8 @@ COBJS-$(CONFIG_EXYNOS_DWMMC) += exynos_dw_mmc.o COBJS-$(CONFIG_ZYNQ_SDHCI) += zynq_sdhci.o ifdef CONFIG_SPL_BUILD COBJS-$(CONFIG_SPL_MMC_BOOT) += fsl_esdhc_spl.o +else +COBJS-$(CONFIG_GENERIC_MMC) += mmc_write.o endif
COBJS := $(COBJS-y) diff --git a/drivers/mmc/mmc.c b/drivers/mmc/mmc.c index 30a985b..666f77b 100644 --- a/drivers/mmc/mmc.c +++ b/drivers/mmc/mmc.c @@ -15,6 +15,7 @@ #include <malloc.h> #include <linux/list.h> #include <div64.h> +#include "mmc_private.h"
/* Set block count limit because of 16 bit register limit on some hardware*/ #ifndef CONFIG_SYS_MMC_MAX_BLK_COUNT @@ -52,8 +53,7 @@ int __board_mmc_getcd(struct mmc *mmc) { int board_mmc_getcd(struct mmc *mmc)__attribute__((weak, alias("__board_mmc_getcd")));
-static int mmc_send_cmd(struct mmc *mmc, struct mmc_cmd *cmd, - struct mmc_data *data) +int mmc_send_cmd(struct mmc *mmc, struct mmc_cmd *cmd, struct mmc_data *data) { struct mmc_data backup; int ret; @@ -114,7 +114,7 @@ static int mmc_send_cmd(struct mmc *mmc, struct mmc_cmd *cmd, return ret; }
-static int mmc_send_status(struct mmc *mmc, int timeout) +int mmc_send_status(struct mmc *mmc, int timeout) { struct mmc_cmd cmd; int err, retries = 5; @@ -162,7 +162,7 @@ static int mmc_send_status(struct mmc *mmc, int timeout) return 0; }
-static int mmc_set_blocklen(struct mmc *mmc, int len) +int mmc_set_blocklen(struct mmc *mmc, int len) { struct mmc_cmd cmd;
@@ -192,184 +192,6 @@ struct mmc *find_mmc_device(int dev_num) return NULL; }
-static ulong mmc_erase_t(struct mmc *mmc, ulong start, lbaint_t blkcnt) -{ - struct mmc_cmd cmd; - ulong end; - int err, start_cmd, end_cmd; - - if (mmc->high_capacity) - end = start + blkcnt - 1; - else { - end = (start + blkcnt - 1) * mmc->write_bl_len; - start *= mmc->write_bl_len; - } - - if (IS_SD(mmc)) { - start_cmd = SD_CMD_ERASE_WR_BLK_START; - end_cmd = SD_CMD_ERASE_WR_BLK_END; - } else { - start_cmd = MMC_CMD_ERASE_GROUP_START; - end_cmd = MMC_CMD_ERASE_GROUP_END; - } - - cmd.cmdidx = start_cmd; - cmd.cmdarg = start; - cmd.resp_type = MMC_RSP_R1; - - err = mmc_send_cmd(mmc, &cmd, NULL); - if (err) - goto err_out; - - cmd.cmdidx = end_cmd; - cmd.cmdarg = end; - - err = mmc_send_cmd(mmc, &cmd, NULL); - if (err) - goto err_out; - - cmd.cmdidx = MMC_CMD_ERASE; - cmd.cmdarg = SECURE_ERASE; - cmd.resp_type = MMC_RSP_R1b; - - err = mmc_send_cmd(mmc, &cmd, NULL); - if (err) - goto err_out; - - return 0; - -err_out: -#if !defined(CONFIG_SPL_BUILD) || defined(CONFIG_SPL_LIBCOMMON_SUPPORT) - puts("mmc erase failed\n"); -#endif - return err; -} - -static unsigned long -mmc_berase(int dev_num, lbaint_t start, lbaint_t blkcnt) -{ - int err = 0; - struct mmc *mmc = find_mmc_device(dev_num); - lbaint_t blk = 0, blk_r = 0; - int timeout = 1000; - - if (!mmc) - return -1; - -#if !defined(CONFIG_SPL_BUILD) || defined(CONFIG_SPL_LIBCOMMON_SUPPORT) - if ((start % mmc->erase_grp_size) || (blkcnt % mmc->erase_grp_size)) - printf("\n\nCaution! Your devices Erase group is 0x%x\n" - "The erase range would be change to " - "0x" LBAF "~0x" LBAF "\n\n", - mmc->erase_grp_size, start & ~(mmc->erase_grp_size - 1), - ((start + blkcnt + mmc->erase_grp_size) - & ~(mmc->erase_grp_size - 1)) - 1); -#endif - - while (blk < blkcnt) { - blk_r = ((blkcnt - blk) > mmc->erase_grp_size) ? - mmc->erase_grp_size : (blkcnt - blk); - err = mmc_erase_t(mmc, start + blk, blk_r); - if (err) - break; - - blk += blk_r; - - /* Waiting for the ready status */ - if (mmc_send_status(mmc, timeout)) - return 0; - } - - return blk; -} - -static ulong -mmc_write_blocks(struct mmc *mmc, lbaint_t start, lbaint_t blkcnt, const void*src) -{ - struct mmc_cmd cmd; - struct mmc_data data; - int timeout = 1000; - - if ((start + blkcnt) > mmc->block_dev.lba) { -#if !defined(CONFIG_SPL_BUILD) || defined(CONFIG_SPL_LIBCOMMON_SUPPORT) - printf("MMC: block number 0x" LBAF " exceeds max(0x" LBAF ")\n", - start + blkcnt, mmc->block_dev.lba); -#endif - return 0; - } - - if (blkcnt == 0) - return 0; - else if (blkcnt == 1) - cmd.cmdidx = MMC_CMD_WRITE_SINGLE_BLOCK; - else - cmd.cmdidx = MMC_CMD_WRITE_MULTIPLE_BLOCK; - - if (mmc->high_capacity) - cmd.cmdarg = start; - else - cmd.cmdarg = start * mmc->write_bl_len; - - cmd.resp_type = MMC_RSP_R1; - - data.src = src; - data.blocks = blkcnt; - data.blocksize = mmc->write_bl_len; - data.flags = MMC_DATA_WRITE; - - if (mmc_send_cmd(mmc, &cmd, &data)) { -#if !defined(CONFIG_SPL_BUILD) || defined(CONFIG_SPL_LIBCOMMON_SUPPORT) - printf("mmc write failed\n"); -#endif - return 0; - } - - /* SPI multiblock writes terminate using a special - * token, not a STOP_TRANSMISSION request. - */ - if (!mmc_host_is_spi(mmc) && blkcnt > 1) { - cmd.cmdidx = MMC_CMD_STOP_TRANSMISSION; - cmd.cmdarg = 0; - cmd.resp_type = MMC_RSP_R1b; - if (mmc_send_cmd(mmc, &cmd, NULL)) { -#if !defined(CONFIG_SPL_BUILD) || defined(CONFIG_SPL_LIBCOMMON_SUPPORT) - printf("mmc fail to send stop cmd\n"); -#endif - return 0; - } - } - - /* Waiting for the ready status */ - if (mmc_send_status(mmc, timeout)) - return 0; - - return blkcnt; -} - -static ulong -mmc_bwrite(int dev_num, lbaint_t start, lbaint_t blkcnt, const void*src) -{ - lbaint_t cur, blocks_todo = blkcnt; - - struct mmc *mmc = find_mmc_device(dev_num); - if (!mmc) - return 0; - - if (mmc_set_blocklen(mmc, mmc->write_bl_len)) - return 0; - - do { - cur = (blocks_todo > mmc->b_max) ? mmc->b_max : blocks_todo; - if(mmc_write_blocks(mmc, start, cur, src) != cur) - return 0; - blocks_todo -= cur; - start += cur; - src += cur * mmc->write_bl_len; - } while (blocks_todo > 0); - - return blkcnt; -} - static int mmc_read_blocks(struct mmc *mmc, void *dst, lbaint_t start, lbaint_t blkcnt) { diff --git a/drivers/mmc/mmc_private.h b/drivers/mmc/mmc_private.h new file mode 100644 index 0000000..16dcf9f --- /dev/null +++ b/drivers/mmc/mmc_private.h @@ -0,0 +1,45 @@ +/* + * Copyright 2008,2010 Freescale Semiconductor, Inc + * Andy Fleming + * + * Based (loosely) on the Linux code + * + * SPDX-License-Identifier: GPL-2.0+ + */ + +#ifndef _MMC_PRIVATE_H_ +#define _MMC_PRIVATE_H_ + +#include <mmc.h> + +extern int mmc_send_cmd(struct mmc *mmc, struct mmc_cmd *cmd, + struct mmc_data *data); +extern int mmc_send_status(struct mmc *mmc, int timeout); +extern int mmc_set_blocklen(struct mmc *mmc, int len); + +#ifndef CONFIG_SPL_BUILD + +extern unsigned long mmc_berase(int dev_num, lbaint_t start, lbaint_t blkcnt); + +extern ulong mmc_bwrite(int dev_num, lbaint_t start, lbaint_t blkcnt, + const void *src); + +#else /* CONFIG_SPL_BUILD */ + +/* SPL will never write or erase, declare dummies to reduce code size. */ + +static inline unsigned long mmc_berase(int dev_num, lbaint_t start, + lbaint_t blkcnt) +{ + return 0; +} + +static inline ulong mmc_bwrite(int dev_num, lbaint_t start, lbaint_t blkcnt, + const void *src) +{ + return 0; +} + +#endif /* CONFIG_SPL_BUILD */ + +#endif /* _MMC_PRIVATE_H_ */ diff --git a/drivers/mmc/mmc_write.c b/drivers/mmc/mmc_write.c new file mode 100644 index 0000000..dde5cf2 --- /dev/null +++ b/drivers/mmc/mmc_write.c @@ -0,0 +1,189 @@ +/* + * Copyright 2008, Freescale Semiconductor, Inc + * Andy Fleming + * + * Based vaguely on the Linux code + * + * SPDX-License-Identifier: GPL-2.0+ + */ + +#include <config.h> +#include <common.h> +#include <part.h> +#include "mmc_private.h" + +static ulong mmc_erase_t(struct mmc *mmc, ulong start, lbaint_t blkcnt) +{ + struct mmc_cmd cmd; + ulong end; + int err, start_cmd, end_cmd; + + if (mmc->high_capacity) { + end = start + blkcnt - 1; + } else { + end = (start + blkcnt - 1) * mmc->write_bl_len; + start *= mmc->write_bl_len; + } + + if (IS_SD(mmc)) { + start_cmd = SD_CMD_ERASE_WR_BLK_START; + end_cmd = SD_CMD_ERASE_WR_BLK_END; + } else { + start_cmd = MMC_CMD_ERASE_GROUP_START; + end_cmd = MMC_CMD_ERASE_GROUP_END; + } + + cmd.cmdidx = start_cmd; + cmd.cmdarg = start; + cmd.resp_type = MMC_RSP_R1; + + err = mmc_send_cmd(mmc, &cmd, NULL); + if (err) + goto err_out; + + cmd.cmdidx = end_cmd; + cmd.cmdarg = end; + + err = mmc_send_cmd(mmc, &cmd, NULL); + if (err) + goto err_out; + + cmd.cmdidx = MMC_CMD_ERASE; + cmd.cmdarg = SECURE_ERASE; + cmd.resp_type = MMC_RSP_R1b; + + err = mmc_send_cmd(mmc, &cmd, NULL); + if (err) + goto err_out; + + return 0; + +err_out: +#if !defined(CONFIG_SPL_BUILD) || defined(CONFIG_SPL_LIBCOMMON_SUPPORT) + puts("mmc erase failed\n"); +#endif + return err; +} + +unsigned long mmc_berase(int dev_num, lbaint_t start, lbaint_t blkcnt) +{ + int err = 0; + struct mmc *mmc = find_mmc_device(dev_num); + lbaint_t blk = 0, blk_r = 0; + int timeout = 1000; + + if (!mmc) + return -1; + +#if !defined(CONFIG_SPL_BUILD) || defined(CONFIG_SPL_LIBCOMMON_SUPPORT) + if ((start % mmc->erase_grp_size) || (blkcnt % mmc->erase_grp_size)) + printf("\n\nCaution! Your devices Erase group is 0x%x\n" + "The erase range would be change to " + "0x" LBAF "~0x" LBAF "\n\n", + mmc->erase_grp_size, start & ~(mmc->erase_grp_size - 1), + ((start + blkcnt + mmc->erase_grp_size) + & ~(mmc->erase_grp_size - 1)) - 1); +#endif + + while (blk < blkcnt) { + blk_r = ((blkcnt - blk) > mmc->erase_grp_size) ? + mmc->erase_grp_size : (blkcnt - blk); + err = mmc_erase_t(mmc, start + blk, blk_r); + if (err) + break; + + blk += blk_r; + + /* Waiting for the ready status */ + if (mmc_send_status(mmc, timeout)) + return 0; + } + + return blk; +} + +static ulong mmc_write_blocks(struct mmc *mmc, lbaint_t start, + lbaint_t blkcnt, const void *src) +{ + struct mmc_cmd cmd; + struct mmc_data data; + int timeout = 1000; + + if ((start + blkcnt) > mmc->block_dev.lba) { +#if !defined(CONFIG_SPL_BUILD) || defined(CONFIG_SPL_LIBCOMMON_SUPPORT) + printf("MMC: block number 0x" LBAF " exceeds max(0x" LBAF ")\n", + start + blkcnt, mmc->block_dev.lba); +#endif + return 0; + } + + if (blkcnt == 0) + return 0; + else if (blkcnt == 1) + cmd.cmdidx = MMC_CMD_WRITE_SINGLE_BLOCK; + else + cmd.cmdidx = MMC_CMD_WRITE_MULTIPLE_BLOCK; + + if (mmc->high_capacity) + cmd.cmdarg = start; + else + cmd.cmdarg = start * mmc->write_bl_len; + + cmd.resp_type = MMC_RSP_R1; + + data.src = src; + data.blocks = blkcnt; + data.blocksize = mmc->write_bl_len; + data.flags = MMC_DATA_WRITE; + + if (mmc_send_cmd(mmc, &cmd, &data)) { +#if !defined(CONFIG_SPL_BUILD) || defined(CONFIG_SPL_LIBCOMMON_SUPPORT) + printf("mmc write failed\n"); +#endif + return 0; + } + + /* SPI multiblock writes terminate using a special + * token, not a STOP_TRANSMISSION request. + */ + if (!mmc_host_is_spi(mmc) && blkcnt > 1) { + cmd.cmdidx = MMC_CMD_STOP_TRANSMISSION; + cmd.cmdarg = 0; + cmd.resp_type = MMC_RSP_R1b; + if (mmc_send_cmd(mmc, &cmd, NULL)) { +#if !defined(CONFIG_SPL_BUILD) || defined(CONFIG_SPL_LIBCOMMON_SUPPORT) + printf("mmc fail to send stop cmd\n"); +#endif + return 0; + } + } + + /* Waiting for the ready status */ + if (mmc_send_status(mmc, timeout)) + return 0; + + return blkcnt; +} + +ulong mmc_bwrite(int dev_num, lbaint_t start, lbaint_t blkcnt, const void *src) +{ + lbaint_t cur, blocks_todo = blkcnt; + + struct mmc *mmc = find_mmc_device(dev_num); + if (!mmc) + return 0; + + if (mmc_set_blocklen(mmc, mmc->write_bl_len)) + return 0; + + do { + cur = (blocks_todo > mmc->b_max) ? mmc->b_max : blocks_todo; + if (mmc_write_blocks(mmc, start, cur, src) != cur) + return 0; + blocks_todo -= cur; + start += cur; + src += cur * mmc->write_bl_len; + } while (blocks_todo > 0); + + return blkcnt; +}