diff options
Diffstat (limited to 'drivers/mmc/bfin_sdh.c')
| -rw-r--r-- | drivers/mmc/bfin_sdh.c | 519 |
1 files changed, 120 insertions, 399 deletions
diff --git a/drivers/mmc/bfin_sdh.c b/drivers/mmc/bfin_sdh.c index 16c9695..f9d560a 100644 --- a/drivers/mmc/bfin_sdh.c +++ b/drivers/mmc/bfin_sdh.c @@ -1,7 +1,7 @@ /* * Driver for Blackfin on-chip SDH controller * - * Copyright (c) 2008 Analog Devices Inc. + * Copyright (c) 2008-2009 Analog Devices Inc. * * Licensed under the GPL-2 or later. */ @@ -18,20 +18,6 @@ #include <asm/mach-common/bits/sdh.h> #include <asm/mach-common/bits/dma.h> -#include "bfin_sdh.h" - -/* SD_CLK frequency must be less than 400k in identification mode */ -#ifndef CONFIG_SYS_MMC_CLK_ID -#define CONFIG_SYS_MMC_CLK_ID 200000 -#endif -/* SD_CLK for normal working */ -#ifndef CONFIG_SYS_MMC_CLK_OP -#define CONFIG_SYS_MMC_CLK_OP 25000000 -#endif -/* support 3.2-3.3V and 3.3-3.4V */ -#define CONFIG_SYS_MMC_OP_COND 0x00300000 -#define MMC_DEFAULT_RCA 1 - #if defined(__ADSPBF51x__) # define bfin_read_SDH_PWR_CTL bfin_read_RSI_PWR_CONTROL # define bfin_write_SDH_PWR_CTL bfin_write_RSI_PWR_CONTROL @@ -64,61 +50,17 @@ # error no support for this proc yet #endif -static unsigned int mmc_rca; -static int mmc_card_is_sd; -static block_dev_desc_t mmc_blkdev; -struct mmc_cid cid; -static __u32 csd[4]; - -#define get_bits(resp, start, size) \ - ({ \ - const int __size = size; \ - const uint32_t __mask = (__size < 32 ? 1 << __size : 0) - 1; \ - const int32_t __off = 3 - ((start) / 32); \ - const int32_t __shft = (start) & 31; \ - uint32_t __res; \ - \ - __res = resp[__off] >> __shft; \ - if (__size + __shft > 32) \ - __res |= resp[__off-1] << ((32 - __shft) % 32); \ - __res & __mask; \ - }) - - -block_dev_desc_t *mmc_get_dev(int dev) -{ - return &mmc_blkdev; -} - -static void mci_set_clk(unsigned long clk) -{ - unsigned long sys_clk; - unsigned long clk_div; - __u16 clk_ctl = 0; - - /* setting SD_CLK */ - sys_clk = get_sclk(); - bfin_write_SDH_CLK_CTL(0); - if (sys_clk % (2 * clk) == 0) - clk_div = sys_clk / (2 * clk) - 1; - else - clk_div = sys_clk / (2 * clk); - - if (clk_div > 0xff) - clk_div = 0xff; - clk_ctl |= (clk_div & 0xff); - clk_ctl |= CLK_E; - bfin_write_SDH_CLK_CTL(clk_ctl); -} - static int -mmc_cmd(unsigned long cmd, unsigned long arg, void *resp, unsigned long flags) +sdh_send_cmd(struct mmc *mmc, struct mmc_cmd *mmc_cmd) { unsigned int sdh_cmd; unsigned int status; + int cmd = mmc_cmd->cmdidx; + int flags = mmc_cmd->resp_type; + int arg = mmc_cmd->cmdarg; int ret = 0; sdh_cmd = 0; - unsigned long *response = resp; + sdh_cmd |= cmd; if (flags & MMC_RSP_PRESENT) @@ -138,336 +80,137 @@ mmc_cmd(unsigned long cmd, unsigned long arg, void *resp, unsigned long flags) CMD_CRC_FAIL))); if (flags & MMC_RSP_PRESENT) { - response[0] = bfin_read_SDH_RESPONSE0(); + mmc_cmd->response[0] = bfin_read_SDH_RESPONSE0(); if (flags & MMC_RSP_136) { - response[1] = bfin_read_SDH_RESPONSE1(); - response[2] = bfin_read_SDH_RESPONSE2(); - response[3] = bfin_read_SDH_RESPONSE3(); + mmc_cmd->response[1] = bfin_read_SDH_RESPONSE1(); + mmc_cmd->response[2] = bfin_read_SDH_RESPONSE2(); + mmc_cmd->response[3] = bfin_read_SDH_RESPONSE3(); } } - if (status & CMD_TIME_OUT) { - printf("CMD%d timeout\n", (int)cmd); - ret |= -ETIMEDOUT; - } else if (status & CMD_CRC_FAIL && flags & MMC_RSP_CRC) { - printf("CMD%d CRC failure\n", (int)cmd); - ret |= -EILSEQ; - } + if (status & CMD_TIME_OUT) + ret |= TIMEOUT; + else if (status & CMD_CRC_FAIL && flags & MMC_RSP_CRC) + ret |= COMM_ERR; + bfin_write_SDH_STATUS_CLR(CMD_SENT_STAT | CMD_RESP_END_STAT | CMD_TIMEOUT_STAT | CMD_CRC_FAIL_STAT); return ret; } -static int -mmc_acmd(unsigned long cmd, unsigned long arg, void *resp, unsigned long flags) +/* set data for single block transfer */ +static int sdh_setup_data(struct mmc *mmc, struct mmc_data *data) { - unsigned long aresp[4]; + u16 data_ctl = 0; + u16 dma_cfg = 0; int ret = 0; - ret = mmc_cmd(MMC_CMD_APP_CMD, 0, aresp, - MMC_RSP_PRESENT); - if (ret) - return ret; - - if ((aresp[0] & (ILLEGAL_COMMAND | APP_CMD)) != APP_CMD) - return -ENODEV; - ret = mmc_cmd(cmd, arg, resp, flags); - return ret; -} - -static unsigned long -mmc_bread(int dev, unsigned long start, lbaint_t blkcnt, void *buffer) -{ - int ret, i; - unsigned long resp[4]; - unsigned long card_status; - __u8 *buf = buffer; - __u32 status; - __u16 data_ctl = 0; - __u16 dma_cfg = 0; - - if (blkcnt == 0) - return 0; - debug("mmc_bread: dev %d, start %d, blkcnt %d\n", dev, start, blkcnt); - /* Force to use 512-byte block,because a lot of code depends on this */ - data_ctl |= 9 << 4; + /* Don't support write yet. */ + if (data->flags & MMC_DATA_WRITE) + return UNUSABLE_ERR; + data_ctl |= ((ffs(data->blocksize) - 1) << 4); data_ctl |= DTX_DIR; bfin_write_SDH_DATA_CTL(data_ctl); - dma_cfg |= WDSIZE_32 | RESTART | WNR | DMAEN; - - /* FIXME later */ - bfin_write_SDH_DATA_TIMER(0xFFFFFFFF); - for (i = 0; i < blkcnt; ++i, ++start) { - blackfin_dcache_flush_invalidate_range(buf + i * mmc_blkdev.blksz, - buf + (i + 1) * mmc_blkdev.blksz); - bfin_write_DMA_START_ADDR(buf + i * mmc_blkdev.blksz); - bfin_write_DMA_X_COUNT(mmc_blkdev.blksz / 4); - bfin_write_DMA_X_MODIFY(4); - bfin_write_DMA_CONFIG(dma_cfg); - bfin_write_SDH_DATA_LGTH(mmc_blkdev.blksz); - /* Put the device into Transfer state */ - ret = mmc_cmd(MMC_CMD_SELECT_CARD, mmc_rca << 16, resp, MMC_RSP_R1); - if (ret) { - printf("MMC_CMD_SELECT_CARD failed\n"); - goto out; - } - /* Set block length */ - ret = mmc_cmd(MMC_CMD_SET_BLOCKLEN, mmc_blkdev.blksz, resp, MMC_RSP_R1); - if (ret) { - printf("MMC_CMD_SET_BLOCKLEN failed\n"); - goto out; - } - ret = mmc_cmd(MMC_CMD_READ_SINGLE_BLOCK, - start * mmc_blkdev.blksz, resp, - MMC_RSP_R1); - if (ret) { - printf("MMC_CMD_READ_SINGLE_BLOCK failed\n"); - goto out; - } - bfin_write_SDH_DATA_CTL(bfin_read_SDH_DATA_CTL() | DTX_DMA_E | DTX_E); + dma_cfg = WDSIZE_32 | RESTART | WNR | DMAEN; - do { - udelay(1); - status = bfin_read_SDH_STATUS(); - } while (!(status & (DAT_BLK_END | DAT_END | DAT_TIME_OUT | DAT_CRC_FAIL | RX_OVERRUN))); - - if (status & (DAT_TIME_OUT | DAT_CRC_FAIL | RX_OVERRUN)) { - bfin_write_SDH_STATUS_CLR(DAT_TIMEOUT_STAT | \ - DAT_CRC_FAIL_STAT | RX_OVERRUN_STAT); - goto read_error; - } else { - bfin_write_SDH_STATUS_CLR(DAT_BLK_END_STAT | DAT_END_STAT); - mmc_cmd(MMC_CMD_SELECT_CARD, 0, resp, 0); - } - } - out: + bfin_write_SDH_DATA_TIMER(0xFFFF); - return i; + blackfin_dcache_flush_invalidate_range(data->dest, + data->dest + data->blocksize); + /* configure DMA */ + bfin_write_DMA_START_ADDR(data->dest); + bfin_write_DMA_X_COUNT(data->blocksize / 4); + bfin_write_DMA_X_MODIFY(4); + bfin_write_DMA_CONFIG(dma_cfg); + bfin_write_SDH_DATA_LGTH(data->blocksize); + /* kick off transfer */ + bfin_write_SDH_DATA_CTL(bfin_read_SDH_DATA_CTL() | DTX_DMA_E | DTX_E); - read_error: - mmc_cmd(MMC_CMD_SEND_STATUS, mmc_rca << 16, &card_status, MMC_RSP_R1); - printf("mmc: bread failed, status = %08x, card status = %08lx\n", - status, card_status); - goto out; + return ret; } -static unsigned long -mmc_bwrite(int dev, unsigned long start, lbaint_t blkcnt, const void *buffer) + +static int bfin_sdh_request(struct mmc *mmc, struct mmc_cmd *cmd, + struct mmc_data *data) { - int ret, i = 0; - unsigned long resp[4]; - unsigned long card_status; - const __u8 *buf = buffer; - __u32 status; - __u16 data_ctl = 0; - __u16 dma_cfg = 0; - - if (blkcnt == 0) - return 0; - - debug("mmc_bwrite: dev %d, start %lx, blkcnt %lx\n", - dev, start, blkcnt); - /* Force to use 512-byte block,because a lot of code depends on this */ - data_ctl |= 9 << 4; - data_ctl &= ~DTX_DIR; - bfin_write_SDH_DATA_CTL(data_ctl); - dma_cfg |= WDSIZE_32 | RESTART | DMAEN; - /* FIXME later */ - bfin_write_SDH_DATA_TIMER(0xFFFFFFFF); - for (i = 0; i < blkcnt; ++i, ++start) { - bfin_write_DMA_START_ADDR(buf + i * mmc_blkdev.blksz); - bfin_write_DMA_X_COUNT(mmc_blkdev.blksz / 4); - bfin_write_DMA_X_MODIFY(4); - bfin_write_DMA_CONFIG(dma_cfg); - bfin_write_SDH_DATA_LGTH(mmc_blkdev.blksz); - - /* Put the device into Transfer state */ - ret = mmc_cmd(MMC_CMD_SELECT_CARD, mmc_rca << 16, resp, MMC_RSP_R1); - if (ret) { - printf("MMC_CMD_SELECT_CARD failed\n"); - goto out; - } - /* Set block length */ - ret = mmc_cmd(MMC_CMD_SET_BLOCKLEN, mmc_blkdev.blksz, resp, MMC_RSP_R1); - if (ret) { - printf("MMC_CMD_SET_BLOCKLEN failed\n"); - goto out; - } - ret = mmc_cmd(MMC_CMD_WRITE_SINGLE_BLOCK, - start * mmc_blkdev.blksz, resp, - MMC_RSP_R1); - if (ret) { - printf("MMC_CMD_WRITE_SINGLE_BLOCK failed\n"); - goto out; - } - bfin_write_SDH_DATA_CTL(bfin_read_SDH_DATA_CTL() | DTX_DMA_E | DTX_E); + u32 status; + int ret = 0; + ret = sdh_send_cmd(mmc, cmd); + if (ret) { + printf("sending CMD%d failed\n", cmd->cmdidx); + return ret; + } + if (data) { + ret = sdh_setup_data(mmc, data); do { udelay(1); status = bfin_read_SDH_STATUS(); - } while (!(status & (DAT_BLK_END | DAT_END | DAT_TIME_OUT | DAT_CRC_FAIL | TX_UNDERRUN))); + } while (!(status & (DAT_BLK_END | DAT_END | DAT_TIME_OUT | DAT_CRC_FAIL | RX_OVERRUN))); - if (status & (DAT_TIME_OUT | DAT_CRC_FAIL | TX_UNDERRUN)) { - bfin_write_SDH_STATUS_CLR(DAT_TIMEOUT_STAT | - DAT_CRC_FAIL_STAT | TX_UNDERRUN_STAT); - goto write_error; - } else { + if (status & DAT_TIME_OUT) { + bfin_write_SDH_STATUS_CLR(DAT_TIMEOUT_STAT); + ret |= TIMEOUT; + } else if (status & (DAT_CRC_FAIL | RX_OVERRUN)) { + bfin_write_SDH_STATUS_CLR(DAT_CRC_FAIL_STAT | RX_OVERRUN_STAT); + ret |= COMM_ERR; + } else bfin_write_SDH_STATUS_CLR(DAT_BLK_END_STAT | DAT_END_STAT); - mmc_cmd(MMC_CMD_SELECT_CARD, 0, resp, 0); + + if (ret) { + printf("tranfering data failed\n"); + return ret; } } - out: - return i; - - write_error: - mmc_cmd(MMC_CMD_SEND_STATUS, mmc_rca << 16, &card_status, MMC_RSP_R1); - printf("mmc: bwrite failed, status = %08x, card status = %08lx\n", - status, card_status); - goto out; -} - -static void mmc_parse_cid(struct mmc_cid *cid, unsigned long *resp) -{ - cid->mid = resp[0] >> 24; - cid->oid = (resp[0] >> 8) & 0xffff; - cid->pnm[0] = resp[0]; - cid->pnm[1] = resp[1] >> 24; - cid->pnm[2] = resp[1] >> 16; - cid->pnm[3] = resp[1] >> 8; - cid->pnm[4] = resp[1]; - cid->pnm[5] = resp[2] >> 24; - cid->pnm[6] = 0; - cid->prv = resp[2] >> 16; - cid->psn = (resp[2] << 16) | (resp[3] >> 16); - cid->mdt = resp[3] >> 8; -} - -static void sd_parse_cid(struct mmc_cid *cid, unsigned long *resp) -{ - cid->mid = resp[0] >> 24; - cid->oid = (resp[0] >> 8) & 0xffff; - cid->pnm[0] = resp[0]; - cid->pnm[1] = resp[1] >> 24; - cid->pnm[2] = resp[1] >> 16; - cid->pnm[3] = resp[1] >> 8; - cid->pnm[4] = resp[1]; - cid->pnm[5] = 0; - cid->pnm[6] = 0; - cid->prv = resp[2] >> 24; - cid->psn = (resp[2] << 8) | (resp[3] >> 24); - cid->mdt = (resp[3] >> 8) & 0x0fff; -} - -static void mmc_dump_cid(const struct mmc_cid *cid) -{ - printf("CID information:\n"); - printf("Manufacturer ID: %02X\n", cid->mid); - printf("OEM/Application ID: %04X\n", cid->oid); - printf("Product name: %s\n", cid->pnm); - printf("Product Revision: %u.%u\n", - cid->prv >> 4, cid->prv & 0x0f); - printf("Product Serial Number: %lu\n", cid->psn); - printf("Manufacturing Date: %02u/%02u\n", - cid->mdt >> 4, cid->mdt & 0x0f); -} - -static void mmc_dump_csd(__u32 *csd) -{ - printf("CSD information:\n"); - printf("CSD structure version: 1.%u\n", get_bits(csd, 126, 2)); - printf("Card command classes: %03x\n", get_bits(csd, 84, 12)); - printf("Max trans speed: %s\n", (get_bits(csd, 96, 8) == 0x32) ? "25MHz" : "50MHz"); - printf("Read block length: %d\n", 1 << get_bits(csd, 80, 4)); - printf("Write block length: %u\n", 1 << get_bits(csd, 22, 4)); - printf("Card capacity: %u bytes\n", - (get_bits(csd, 62, 12) + 1) * (1 << (get_bits(csd, 47, 3) + 2)) * - (1 << get_bits(csd, 80, 4))); - putc('\n'); + return 0; } -static int mmc_idle_cards(void) +static void sdh_set_clk(unsigned long clk) { - int ret = 0; - - /* Reset all cards */ - ret = mmc_cmd(MMC_CMD_GO_IDLE_STATE, 0, NULL, 0); - if (ret) - return ret; - udelay(500); - return mmc_cmd(MMC_CMD_GO_IDLE_STATE, 0, NULL, 0); + unsigned long sys_clk; + unsigned long clk_div; + u16 clk_ctl = 0; + + clk_ctl = bfin_read_SDH_CLK_CTL(); + if (clk) { + /* setting SD_CLK */ + sys_clk = get_sclk(); + bfin_write_SDH_CLK_CTL(clk_ctl & ~CLK_E); + if (sys_clk % (2 * clk) == 0) + clk_div = sys_clk / (2 * clk) - 1; + else + clk_div = sys_clk / (2 * clk); + + if (clk_div > 0xff) + clk_div = 0xff; + clk_ctl |= (clk_div & 0xff); + clk_ctl |= CLK_E; + bfin_write_SDH_CLK_CTL(clk_ctl); + } else + bfin_write_SDH_CLK_CTL(clk_ctl & ~CLK_E); } -static int sd_init_card(struct mmc_cid *cid, int verbose) +static void bfin_sdh_set_ios(struct mmc *mmc) { - unsigned long resp[4]; - int i, ret = 0; - - mmc_idle_cards(); - for (i = 0; i < 1000; ++i) { - ret = mmc_acmd(SD_CMD_APP_SEND_OP_COND, CONFIG_SYS_MMC_OP_COND, - resp, MMC_RSP_R3); - if (ret || (resp[0] & 0x80000000)) - break; - ret = -ETIMEDOUT; + u16 cfg = 0; + u16 clk_ctl = 0; + + if (mmc->bus_width == 4) { + cfg = bfin_read_SDH_CFG(); + cfg &= ~0x80; + cfg |= 0x40; + bfin_write_SDH_CFG(cfg); + clk_ctl |= WIDE_BUS; } - if (ret) - return ret; - - ret = mmc_cmd(MMC_CMD_ALL_SEND_CID, 0, resp, MMC_RSP_R2); - if (ret) - return ret; - sd_parse_cid(cid, resp); - if (verbose) - mmc_dump_cid(cid); - - /* Get RCA of the card that responded */ - ret = mmc_cmd(SD_CMD_SEND_RELATIVE_ADDR, 0, resp, MMC_RSP_R6); - if (ret) - return ret; - - mmc_rca = (resp[0] >> 16) & 0xffff; - if (verbose) - printf("SD Card detected (RCA %u)\n", mmc_rca); - mmc_card_is_sd = 1; - return 0; + bfin_write_SDH_CLK_CTL(clk_ctl); + sdh_set_clk(mmc->clock); } -static int mmc_init_card(struct mmc_cid *cid, int verbose) +static int bfin_sdh_init(struct mmc *mmc) { - unsigned long resp[4]; - int i, ret = 0; - - mmc_idle_cards(); - for (i = 0; i < 1000; ++i) { - ret = mmc_cmd(MMC_CMD_SEND_OP_COND, CONFIG_SYS_MMC_OP_COND, resp, - MMC_RSP_R3); - if (ret || (resp[0] & 0x80000000)) - break; - ret = -ETIMEDOUT; - } - if (ret) - return ret; - /* Get CID of all cards. FIXME: Support more than one card */ - ret = mmc_cmd(MMC_CMD_ALL_SEND_CID, 0, resp, MMC_RSP_R2); - if (ret) - return ret; - mmc_parse_cid(cid, resp); - if (verbose) - mmc_dump_cid(cid); - - /* Set Relative Address of the card that responded */ - ret = mmc_cmd(MMC_CMD_SET_RELATIVE_ADDR, mmc_rca << 16, resp, - MMC_RSP_R1); - return ret; -} - -int mmc_legacy_init(int verbose) -{ - __u16 pwr_ctl = 0; - int ret; - unsigned int max_blksz; - /* Initialize sdh controller */ + u16 pwr_ctl = 0; +/* Initialize sdh controller */ #if defined(__ADSPBF54x__) bfin_write_DMAC1_PERIMUX(bfin_read_DMAC1_PERIMUX() | 0x1); bfin_write_PORTC_FER(bfin_read_PORTC_FER() | 0x3F00); @@ -481,56 +224,34 @@ int mmc_legacy_init(int verbose) bfin_write_SDH_CFG(bfin_read_SDH_CFG() | CLKS_EN); /* Disable card detect pin */ bfin_write_SDH_CFG((bfin_read_SDH_CFG() & 0x1F) | 0x60); - mci_set_clk(CONFIG_SYS_MMC_CLK_ID); - /* setting power control */ + pwr_ctl |= ROD_CTL; pwr_ctl |= PWR_ON; bfin_write_SDH_PWR_CTL(pwr_ctl); - mmc_card_is_sd = 0; - ret = sd_init_card(&cid, verbose); - if (ret) { - mmc_rca = MMC_DEFAULT_RCA; - ret = mmc_init_card(&cid, verbose); - } - if (ret) - return ret; - /* Get CSD from the card */ - ret = mmc_cmd(MMC_CMD_SEND_CSD, mmc_rca << 16, csd, MMC_RSP_R2); - if (ret) - return ret; - if (verbose) - mmc_dump_csd(csd); - /* Initialize the blockdev structure */ - mmc_blkdev.if_type = IF_TYPE_MMC; - mmc_blkdev.part_type = PART_TYPE_DOS; - mmc_blkdev.block_read = mmc_bread; - mmc_blkdev.block_write = mmc_bwrite; - sprintf(mmc_blkdev.vendor, - "Man %02x%04x Snr %08lx", - cid.mid, cid.oid, cid.psn); - strncpy(mmc_blkdev.product, cid.pnm, - sizeof(mmc_blkdev.product)); - sprintf(mmc_blkdev.revision, "%x %x", - cid.prv >> 4, cid.prv & 0x0f); - - max_blksz = 1 << get_bits(csd, 80, 4); - /* - * If we can't use 512 byte blocks, refuse to deal with the - * card. Tons of code elsewhere seems to depend on this. - */ - if (max_blksz < 512 || (max_blksz > 512 && !get_bits(csd, 79, 1))) { - printf("Card does not support 512 byte reads, aborting.\n"); - return -ENODEV; - } - - mmc_blkdev.blksz = 512; - mmc_blkdev.lba = (get_bits(csd, 62, 12) + 1) * (1 << (get_bits(csd, 47, 3) + 2)); - mci_set_clk(CONFIG_SYS_MMC_CLK_OP); - init_part(&mmc_blkdev); return 0; } -int mmc2info(ulong addr) + +int bfin_mmc_init(bd_t *bis) { + struct mmc *mmc = NULL; + + mmc = malloc(sizeof(struct mmc)); + + if (!mmc) + return -ENOMEM; + sprintf(mmc->name, "Blackfin SDH"); + mmc->send_cmd = bfin_sdh_request; + mmc->set_ios = bfin_sdh_set_ios; + mmc->init = bfin_sdh_init; + mmc->host_caps = MMC_MODE_4BIT; + + mmc->voltages = MMC_VDD_32_33 | MMC_VDD_33_34; + mmc->f_max = get_sclk(); + mmc->f_min = mmc->f_max >> 9; + mmc->block_dev.part_type = PART_TYPE_DOS; + + mmc_register(mmc); + return 0; } |