diff options
Diffstat (limited to 'drivers/mmc/bfin_sdh.c')
| -rw-r--r-- | drivers/mmc/bfin_sdh.c | 546 |
1 files changed, 546 insertions, 0 deletions
diff --git a/drivers/mmc/bfin_sdh.c b/drivers/mmc/bfin_sdh.c new file mode 100644 index 0000000..7d6b495 --- /dev/null +++ b/drivers/mmc/bfin_sdh.c @@ -0,0 +1,546 @@ +/* + * Driver for Blackfin on-chip SDH controller + * + * Copyright (c) 2008 Analog Devices Inc. + * + * Licensed under the GPL-2 or later. + */ + +#include <common.h> +#include <malloc.h> +#include <part.h> +#include <mmc.h> + +#include <asm/io.h> +#include <asm/errno.h> +#include <asm/byteorder.h> +#include <asm/blackfin.h> +#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 +# define bfin_read_SDH_CLK_CTL bfin_read_RSI_CLK_CONTROL +# define bfin_write_SDH_CLK_CTL bfin_write_RSI_CLK_CONTROL +# define bfin_write_SDH_ARGUMENT bfin_write_RSI_ARGUMENT +# define bfin_write_SDH_COMMAND bfin_write_RSI_COMMAND +# define bfin_read_SDH_RESPONSE0 bfin_read_RSI_RESPONSE0 +# define bfin_read_SDH_RESPONSE1 bfin_read_RSI_RESPONSE1 +# define bfin_read_SDH_RESPONSE2 bfin_read_RSI_RESPONSE2 +# define bfin_read_SDH_RESPONSE3 bfin_read_RSI_RESPONSE3 +# define bfin_write_SDH_DATA_TIMER bfin_write_RSI_DATA_TIMER +# define bfin_write_SDH_DATA_LGTH bfin_write_RSI_DATA_LGTH +# define bfin_read_SDH_DATA_CTL bfin_read_RSI_DATA_CONTROL +# define bfin_write_SDH_DATA_CTL bfin_write_RSI_DATA_CONTROL +# define bfin_read_SDH_STATUS bfin_read_RSI_STATUS +# define bfin_write_SDH_STATUS_CLR bfin_write_RSI_STATUSCL +# define bfin_read_SDH_CFG bfin_read_RSI_CONFIG +# define bfin_write_SDH_CFG bfin_write_RSI_CONFIG +# define bfin_write_DMA_START_ADDR bfin_write_DMA4_START_ADDR +# define bfin_write_DMA_X_COUNT bfin_write_DMA4_X_COUNT +# define bfin_write_DMA_X_MODIFY bfin_write_DMA4_X_MODIFY +# define bfin_write_DMA_CONFIG bfin_write_DMA4_CONFIG +#elif defined(__ADSPBF54x__) +# define bfin_write_DMA_START_ADDR bfin_write_DMA22_START_ADDR +# define bfin_write_DMA_X_COUNT bfin_write_DMA22_X_COUNT +# define bfin_write_DMA_X_MODIFY bfin_write_DMA22_X_MODIFY +# define bfin_write_DMA_CONFIG bfin_write_DMA22_CONFIG +#else +# 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) +{ + unsigned int sdh_cmd; + unsigned int status; + int ret = 0; + sdh_cmd = 0; + unsigned long *response = resp; + sdh_cmd |= cmd; + + if (flags & MMC_RSP_PRESENT) + sdh_cmd |= CMD_RSP; + + if (flags & MMC_RSP_136) + sdh_cmd |= CMD_L_RSP; + + bfin_write_SDH_ARGUMENT(arg); + bfin_write_SDH_COMMAND(sdh_cmd | CMD_E); + + /* wait for a while */ + do { + udelay(1); + status = bfin_read_SDH_STATUS(); + } while (!(status & (CMD_SENT | CMD_RESP_END | CMD_TIME_OUT | + CMD_CRC_FAIL))); + + if (flags & MMC_RSP_PRESENT) { + 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(); + } + } + + 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; + } + 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) +{ + unsigned long aresp[4]; + 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; + 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); + + 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: + + return i; + + 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; +} + +static unsigned long +mmc_bwrite(int dev, unsigned long start, lbaint_t blkcnt, const void *buffer) +{ + 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_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); + + do { + udelay(1); + status = bfin_read_SDH_STATUS(); + } while (!(status & (DAT_BLK_END | DAT_END | DAT_TIME_OUT | DAT_CRC_FAIL | TX_UNDERRUN))); + + 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 { + bfin_write_SDH_STATUS_CLR(DAT_BLK_END_STAT | DAT_END_STAT); + mmc_cmd(MMC_CMD_SELECT_CARD, 0, resp, 0); + } + } + 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'); +} + +static int mmc_idle_cards(void) +{ + 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); +} + +static int sd_init_card(struct mmc_cid *cid, int verbose) +{ + 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; + } + 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; +} + +static int mmc_init_card(struct mmc_cid *cid, int verbose) +{ + 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_init(int verbose) +{ + __u16 pwr_ctl = 0; + int ret; + unsigned int max_blksz; + /* Initialize sdh controller */ +#if defined(__ADSPBF54x__) + bfin_write_DMAC1_PERIMUX(bfin_read_DMAC1_PERIMUX() | 0x1); + bfin_write_PORTC_FER(bfin_read_PORTC_FER() | 0x3F00); + bfin_write_PORTC_MUX(bfin_read_PORTC_MUX() & ~0xFFF0000); +#elif defined(__ADSPBF51x__) + bfin_write_PORTG_FER(bfin_read_PORTG_FER() | 0x01F8); + bfin_write_PORTG_MUX((bfin_read_PORTG_MUX() & ~0x3FC) | 0x154); +#else +# error no portmux for this proc yet +#endif + 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 mmc_read(ulong src, uchar *dst, int size) +{ + return -ENOSYS; +} + +int mmc_write(uchar *src, ulong dst, int size) +{ + return -ENOSYS; +} + +int mmc2info(ulong addr) +{ + return 0; +} |