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![Mike Frysinger](/assets/img/avatar_default.png)
The Blackfin SDH controller is still using the legacy framework, so update the driver to use the renamed functions. Signed-off-by: Mike Frysinger <vapier@gentoo.org>
537 lines
15 KiB
C
537 lines
15 KiB
C
/*
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* Driver for Blackfin on-chip SDH controller
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*
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* Copyright (c) 2008 Analog Devices Inc.
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*
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* Licensed under the GPL-2 or later.
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*/
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#include <common.h>
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#include <malloc.h>
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#include <part.h>
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#include <mmc.h>
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#include <asm/io.h>
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#include <asm/errno.h>
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#include <asm/byteorder.h>
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#include <asm/blackfin.h>
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#include <asm/mach-common/bits/sdh.h>
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#include <asm/mach-common/bits/dma.h>
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#include "bfin_sdh.h"
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/* SD_CLK frequency must be less than 400k in identification mode */
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#ifndef CONFIG_SYS_MMC_CLK_ID
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#define CONFIG_SYS_MMC_CLK_ID 200000
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#endif
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/* SD_CLK for normal working */
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#ifndef CONFIG_SYS_MMC_CLK_OP
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#define CONFIG_SYS_MMC_CLK_OP 25000000
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#endif
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/* support 3.2-3.3V and 3.3-3.4V */
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#define CONFIG_SYS_MMC_OP_COND 0x00300000
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#define MMC_DEFAULT_RCA 1
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#if defined(__ADSPBF51x__)
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# define bfin_read_SDH_PWR_CTL bfin_read_RSI_PWR_CONTROL
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# define bfin_write_SDH_PWR_CTL bfin_write_RSI_PWR_CONTROL
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# define bfin_read_SDH_CLK_CTL bfin_read_RSI_CLK_CONTROL
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# define bfin_write_SDH_CLK_CTL bfin_write_RSI_CLK_CONTROL
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# define bfin_write_SDH_ARGUMENT bfin_write_RSI_ARGUMENT
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# define bfin_write_SDH_COMMAND bfin_write_RSI_COMMAND
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# define bfin_read_SDH_RESPONSE0 bfin_read_RSI_RESPONSE0
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# define bfin_read_SDH_RESPONSE1 bfin_read_RSI_RESPONSE1
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# define bfin_read_SDH_RESPONSE2 bfin_read_RSI_RESPONSE2
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# define bfin_read_SDH_RESPONSE3 bfin_read_RSI_RESPONSE3
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# define bfin_write_SDH_DATA_TIMER bfin_write_RSI_DATA_TIMER
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# define bfin_write_SDH_DATA_LGTH bfin_write_RSI_DATA_LGTH
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# define bfin_read_SDH_DATA_CTL bfin_read_RSI_DATA_CONTROL
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# define bfin_write_SDH_DATA_CTL bfin_write_RSI_DATA_CONTROL
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# define bfin_read_SDH_STATUS bfin_read_RSI_STATUS
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# define bfin_write_SDH_STATUS_CLR bfin_write_RSI_STATUSCL
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# define bfin_read_SDH_CFG bfin_read_RSI_CONFIG
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# define bfin_write_SDH_CFG bfin_write_RSI_CONFIG
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# define bfin_write_DMA_START_ADDR bfin_write_DMA4_START_ADDR
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# define bfin_write_DMA_X_COUNT bfin_write_DMA4_X_COUNT
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# define bfin_write_DMA_X_MODIFY bfin_write_DMA4_X_MODIFY
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# define bfin_write_DMA_CONFIG bfin_write_DMA4_CONFIG
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#elif defined(__ADSPBF54x__)
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# define bfin_write_DMA_START_ADDR bfin_write_DMA22_START_ADDR
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# define bfin_write_DMA_X_COUNT bfin_write_DMA22_X_COUNT
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# define bfin_write_DMA_X_MODIFY bfin_write_DMA22_X_MODIFY
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# define bfin_write_DMA_CONFIG bfin_write_DMA22_CONFIG
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#else
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# error no support for this proc yet
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#endif
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static unsigned int mmc_rca;
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static int mmc_card_is_sd;
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static block_dev_desc_t mmc_blkdev;
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struct mmc_cid cid;
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static __u32 csd[4];
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#define get_bits(resp, start, size) \
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({ \
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const int __size = size; \
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const uint32_t __mask = (__size < 32 ? 1 << __size : 0) - 1; \
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const int32_t __off = 3 - ((start) / 32); \
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const int32_t __shft = (start) & 31; \
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uint32_t __res; \
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\
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__res = resp[__off] >> __shft; \
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if (__size + __shft > 32) \
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__res |= resp[__off-1] << ((32 - __shft) % 32); \
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__res & __mask; \
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})
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block_dev_desc_t *mmc_get_dev(int dev)
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{
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return &mmc_blkdev;
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}
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static void mci_set_clk(unsigned long clk)
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{
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unsigned long sys_clk;
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unsigned long clk_div;
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__u16 clk_ctl = 0;
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/* setting SD_CLK */
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sys_clk = get_sclk();
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bfin_write_SDH_CLK_CTL(0);
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if (sys_clk % (2 * clk) == 0)
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clk_div = sys_clk / (2 * clk) - 1;
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else
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clk_div = sys_clk / (2 * clk);
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if (clk_div > 0xff)
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clk_div = 0xff;
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clk_ctl |= (clk_div & 0xff);
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clk_ctl |= CLK_E;
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bfin_write_SDH_CLK_CTL(clk_ctl);
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}
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static int
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mmc_cmd(unsigned long cmd, unsigned long arg, void *resp, unsigned long flags)
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{
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unsigned int sdh_cmd;
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unsigned int status;
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int ret = 0;
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sdh_cmd = 0;
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unsigned long *response = resp;
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sdh_cmd |= cmd;
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if (flags & MMC_RSP_PRESENT)
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sdh_cmd |= CMD_RSP;
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if (flags & MMC_RSP_136)
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sdh_cmd |= CMD_L_RSP;
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bfin_write_SDH_ARGUMENT(arg);
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bfin_write_SDH_COMMAND(sdh_cmd | CMD_E);
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/* wait for a while */
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do {
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udelay(1);
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status = bfin_read_SDH_STATUS();
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} while (!(status & (CMD_SENT | CMD_RESP_END | CMD_TIME_OUT |
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CMD_CRC_FAIL)));
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if (flags & MMC_RSP_PRESENT) {
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response[0] = bfin_read_SDH_RESPONSE0();
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if (flags & MMC_RSP_136) {
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response[1] = bfin_read_SDH_RESPONSE1();
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response[2] = bfin_read_SDH_RESPONSE2();
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response[3] = bfin_read_SDH_RESPONSE3();
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}
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}
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if (status & CMD_TIME_OUT) {
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printf("CMD%d timeout\n", (int)cmd);
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ret |= -ETIMEDOUT;
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} else if (status & CMD_CRC_FAIL && flags & MMC_RSP_CRC) {
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printf("CMD%d CRC failure\n", (int)cmd);
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ret |= -EILSEQ;
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}
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bfin_write_SDH_STATUS_CLR(CMD_SENT_STAT | CMD_RESP_END_STAT |
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CMD_TIMEOUT_STAT | CMD_CRC_FAIL_STAT);
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return ret;
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}
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static int
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mmc_acmd(unsigned long cmd, unsigned long arg, void *resp, unsigned long flags)
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{
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unsigned long aresp[4];
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int ret = 0;
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ret = mmc_cmd(MMC_CMD_APP_CMD, 0, aresp,
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MMC_RSP_PRESENT);
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if (ret)
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return ret;
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if ((aresp[0] & (ILLEGAL_COMMAND | APP_CMD)) != APP_CMD)
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return -ENODEV;
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ret = mmc_cmd(cmd, arg, resp, flags);
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return ret;
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}
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static unsigned long
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mmc_bread(int dev, unsigned long start, lbaint_t blkcnt, void *buffer)
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{
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int ret, i;
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unsigned long resp[4];
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unsigned long card_status;
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__u8 *buf = buffer;
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__u32 status;
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__u16 data_ctl = 0;
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__u16 dma_cfg = 0;
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if (blkcnt == 0)
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return 0;
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debug("mmc_bread: dev %d, start %d, blkcnt %d\n", dev, start, blkcnt);
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/* Force to use 512-byte block,because a lot of code depends on this */
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data_ctl |= 9 << 4;
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data_ctl |= DTX_DIR;
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bfin_write_SDH_DATA_CTL(data_ctl);
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dma_cfg |= WDSIZE_32 | RESTART | WNR | DMAEN;
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/* FIXME later */
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bfin_write_SDH_DATA_TIMER(0xFFFFFFFF);
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for (i = 0; i < blkcnt; ++i, ++start) {
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blackfin_dcache_flush_invalidate_range(buf + i * mmc_blkdev.blksz,
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buf + (i + 1) * mmc_blkdev.blksz);
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bfin_write_DMA_START_ADDR(buf + i * mmc_blkdev.blksz);
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bfin_write_DMA_X_COUNT(mmc_blkdev.blksz / 4);
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bfin_write_DMA_X_MODIFY(4);
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bfin_write_DMA_CONFIG(dma_cfg);
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bfin_write_SDH_DATA_LGTH(mmc_blkdev.blksz);
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/* Put the device into Transfer state */
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ret = mmc_cmd(MMC_CMD_SELECT_CARD, mmc_rca << 16, resp, MMC_RSP_R1);
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if (ret) {
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printf("MMC_CMD_SELECT_CARD failed\n");
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goto out;
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}
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/* Set block length */
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ret = mmc_cmd(MMC_CMD_SET_BLOCKLEN, mmc_blkdev.blksz, resp, MMC_RSP_R1);
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if (ret) {
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printf("MMC_CMD_SET_BLOCKLEN failed\n");
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goto out;
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}
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ret = mmc_cmd(MMC_CMD_READ_SINGLE_BLOCK,
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start * mmc_blkdev.blksz, resp,
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MMC_RSP_R1);
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if (ret) {
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printf("MMC_CMD_READ_SINGLE_BLOCK failed\n");
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goto out;
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}
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bfin_write_SDH_DATA_CTL(bfin_read_SDH_DATA_CTL() | DTX_DMA_E | DTX_E);
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do {
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udelay(1);
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status = bfin_read_SDH_STATUS();
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} while (!(status & (DAT_BLK_END | DAT_END | DAT_TIME_OUT | DAT_CRC_FAIL | RX_OVERRUN)));
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if (status & (DAT_TIME_OUT | DAT_CRC_FAIL | RX_OVERRUN)) {
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bfin_write_SDH_STATUS_CLR(DAT_TIMEOUT_STAT | \
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DAT_CRC_FAIL_STAT | RX_OVERRUN_STAT);
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goto read_error;
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} else {
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bfin_write_SDH_STATUS_CLR(DAT_BLK_END_STAT | DAT_END_STAT);
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mmc_cmd(MMC_CMD_SELECT_CARD, 0, resp, 0);
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}
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}
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out:
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return i;
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read_error:
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mmc_cmd(MMC_CMD_SEND_STATUS, mmc_rca << 16, &card_status, MMC_RSP_R1);
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printf("mmc: bread failed, status = %08x, card status = %08lx\n",
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status, card_status);
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goto out;
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}
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static unsigned long
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mmc_bwrite(int dev, unsigned long start, lbaint_t blkcnt, const void *buffer)
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{
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int ret, i = 0;
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unsigned long resp[4];
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unsigned long card_status;
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const __u8 *buf = buffer;
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__u32 status;
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__u16 data_ctl = 0;
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__u16 dma_cfg = 0;
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if (blkcnt == 0)
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return 0;
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debug("mmc_bwrite: dev %d, start %lx, blkcnt %lx\n",
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dev, start, blkcnt);
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/* Force to use 512-byte block,because a lot of code depends on this */
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data_ctl |= 9 << 4;
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data_ctl &= ~DTX_DIR;
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bfin_write_SDH_DATA_CTL(data_ctl);
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dma_cfg |= WDSIZE_32 | RESTART | DMAEN;
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/* FIXME later */
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bfin_write_SDH_DATA_TIMER(0xFFFFFFFF);
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for (i = 0; i < blkcnt; ++i, ++start) {
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bfin_write_DMA_START_ADDR(buf + i * mmc_blkdev.blksz);
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bfin_write_DMA_X_COUNT(mmc_blkdev.blksz / 4);
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bfin_write_DMA_X_MODIFY(4);
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bfin_write_DMA_CONFIG(dma_cfg);
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bfin_write_SDH_DATA_LGTH(mmc_blkdev.blksz);
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/* Put the device into Transfer state */
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ret = mmc_cmd(MMC_CMD_SELECT_CARD, mmc_rca << 16, resp, MMC_RSP_R1);
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if (ret) {
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printf("MMC_CMD_SELECT_CARD failed\n");
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goto out;
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}
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/* Set block length */
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ret = mmc_cmd(MMC_CMD_SET_BLOCKLEN, mmc_blkdev.blksz, resp, MMC_RSP_R1);
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if (ret) {
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printf("MMC_CMD_SET_BLOCKLEN failed\n");
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goto out;
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}
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ret = mmc_cmd(MMC_CMD_WRITE_SINGLE_BLOCK,
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start * mmc_blkdev.blksz, resp,
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MMC_RSP_R1);
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if (ret) {
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printf("MMC_CMD_WRITE_SINGLE_BLOCK failed\n");
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goto out;
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}
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bfin_write_SDH_DATA_CTL(bfin_read_SDH_DATA_CTL() | DTX_DMA_E | DTX_E);
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do {
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udelay(1);
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status = bfin_read_SDH_STATUS();
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} while (!(status & (DAT_BLK_END | DAT_END | DAT_TIME_OUT | DAT_CRC_FAIL | TX_UNDERRUN)));
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if (status & (DAT_TIME_OUT | DAT_CRC_FAIL | TX_UNDERRUN)) {
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bfin_write_SDH_STATUS_CLR(DAT_TIMEOUT_STAT |
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DAT_CRC_FAIL_STAT | TX_UNDERRUN_STAT);
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goto write_error;
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} else {
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bfin_write_SDH_STATUS_CLR(DAT_BLK_END_STAT | DAT_END_STAT);
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mmc_cmd(MMC_CMD_SELECT_CARD, 0, resp, 0);
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}
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}
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out:
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return i;
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write_error:
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mmc_cmd(MMC_CMD_SEND_STATUS, mmc_rca << 16, &card_status, MMC_RSP_R1);
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printf("mmc: bwrite failed, status = %08x, card status = %08lx\n",
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status, card_status);
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goto out;
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}
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static void mmc_parse_cid(struct mmc_cid *cid, unsigned long *resp)
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{
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cid->mid = resp[0] >> 24;
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cid->oid = (resp[0] >> 8) & 0xffff;
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cid->pnm[0] = resp[0];
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cid->pnm[1] = resp[1] >> 24;
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cid->pnm[2] = resp[1] >> 16;
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cid->pnm[3] = resp[1] >> 8;
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cid->pnm[4] = resp[1];
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cid->pnm[5] = resp[2] >> 24;
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cid->pnm[6] = 0;
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cid->prv = resp[2] >> 16;
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cid->psn = (resp[2] << 16) | (resp[3] >> 16);
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cid->mdt = resp[3] >> 8;
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}
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static void sd_parse_cid(struct mmc_cid *cid, unsigned long *resp)
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{
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cid->mid = resp[0] >> 24;
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cid->oid = (resp[0] >> 8) & 0xffff;
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cid->pnm[0] = resp[0];
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cid->pnm[1] = resp[1] >> 24;
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cid->pnm[2] = resp[1] >> 16;
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cid->pnm[3] = resp[1] >> 8;
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cid->pnm[4] = resp[1];
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cid->pnm[5] = 0;
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cid->pnm[6] = 0;
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cid->prv = resp[2] >> 24;
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cid->psn = (resp[2] << 8) | (resp[3] >> 24);
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cid->mdt = (resp[3] >> 8) & 0x0fff;
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}
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static void mmc_dump_cid(const struct mmc_cid *cid)
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{
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printf("CID information:\n");
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printf("Manufacturer ID: %02X\n", cid->mid);
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printf("OEM/Application ID: %04X\n", cid->oid);
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printf("Product name: %s\n", cid->pnm);
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printf("Product Revision: %u.%u\n",
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cid->prv >> 4, cid->prv & 0x0f);
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printf("Product Serial Number: %lu\n", cid->psn);
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printf("Manufacturing Date: %02u/%02u\n",
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cid->mdt >> 4, cid->mdt & 0x0f);
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}
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static void mmc_dump_csd(__u32 *csd)
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{
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printf("CSD information:\n");
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printf("CSD structure version: 1.%u\n", get_bits(csd, 126, 2));
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printf("Card command classes: %03x\n", get_bits(csd, 84, 12));
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printf("Max trans speed: %s\n", (get_bits(csd, 96, 8) == 0x32) ? "25MHz" : "50MHz");
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printf("Read block length: %d\n", 1 << get_bits(csd, 80, 4));
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printf("Write block length: %u\n", 1 << get_bits(csd, 22, 4));
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printf("Card capacity: %u bytes\n",
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(get_bits(csd, 62, 12) + 1) * (1 << (get_bits(csd, 47, 3) + 2)) *
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(1 << get_bits(csd, 80, 4)));
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putc('\n');
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}
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static int mmc_idle_cards(void)
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{
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int ret = 0;
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/* Reset all cards */
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ret = mmc_cmd(MMC_CMD_GO_IDLE_STATE, 0, NULL, 0);
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if (ret)
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return ret;
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udelay(500);
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return mmc_cmd(MMC_CMD_GO_IDLE_STATE, 0, NULL, 0);
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}
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static int sd_init_card(struct mmc_cid *cid, int verbose)
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{
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unsigned long resp[4];
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int i, ret = 0;
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mmc_idle_cards();
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for (i = 0; i < 1000; ++i) {
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ret = mmc_acmd(SD_CMD_APP_SEND_OP_COND, CONFIG_SYS_MMC_OP_COND,
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resp, MMC_RSP_R3);
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if (ret || (resp[0] & 0x80000000))
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break;
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ret = -ETIMEDOUT;
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}
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if (ret)
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return ret;
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ret = mmc_cmd(MMC_CMD_ALL_SEND_CID, 0, resp, MMC_RSP_R2);
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if (ret)
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return ret;
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sd_parse_cid(cid, resp);
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if (verbose)
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mmc_dump_cid(cid);
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/* Get RCA of the card that responded */
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ret = mmc_cmd(SD_CMD_SEND_RELATIVE_ADDR, 0, resp, MMC_RSP_R6);
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if (ret)
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return ret;
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mmc_rca = (resp[0] >> 16) & 0xffff;
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if (verbose)
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printf("SD Card detected (RCA %u)\n", mmc_rca);
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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_legacy_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 mmc2info(ulong addr)
|
|
{
|
|
return 0;
|
|
}
|