#include <asm/arch/clock.h>
#include <asm/arch/imx-regs.h>
#include <asm/arch/sys_proto.h>
+#include <asm/arch/dma.h>
+#include <bouncebuf.h>
struct mxsmmc_priv {
int id;
- struct mx28_ssp_regs *regs;
- uint32_t clkseq_bypass;
- uint32_t *clkctrl_ssp;
+ struct mxs_ssp_regs *regs;
uint32_t buswidth;
int (*mmc_is_wp)(int);
+ int (*mmc_cd)(int);
+ struct mxs_dma_desc *desc;
};
#define MXSMMC_MAX_TIMEOUT 10000
+#define MXSMMC_SMALL_TRANSFER 512
+
+static int mxsmmc_cd(struct mxsmmc_priv *priv)
+{
+ struct mxs_ssp_regs *ssp_regs = priv->regs;
+
+ if (priv->mmc_cd)
+ return priv->mmc_cd(priv->id);
+
+ return !(readl(&ssp_regs->hw_ssp_status) & SSP_STATUS_CARD_DETECT);
+}
+
+static int mxsmmc_send_cmd_pio(struct mxsmmc_priv *priv, struct mmc_data *data)
+{
+ struct mxs_ssp_regs *ssp_regs = priv->regs;
+ uint32_t *data_ptr;
+ int timeout = MXSMMC_MAX_TIMEOUT;
+ uint32_t reg;
+ uint32_t data_count = data->blocksize * data->blocks;
+
+ if (data->flags & MMC_DATA_READ) {
+ data_ptr = (uint32_t *)data->dest;
+ while (data_count && --timeout) {
+ reg = readl(&ssp_regs->hw_ssp_status);
+ if (!(reg & SSP_STATUS_FIFO_EMPTY)) {
+ *data_ptr++ = readl(&ssp_regs->hw_ssp_data);
+ data_count -= 4;
+ timeout = MXSMMC_MAX_TIMEOUT;
+ } else
+ udelay(1000);
+ }
+ } else {
+ data_ptr = (uint32_t *)data->src;
+ timeout *= 100;
+ while (data_count && --timeout) {
+ reg = readl(&ssp_regs->hw_ssp_status);
+ if (!(reg & SSP_STATUS_FIFO_FULL)) {
+ writel(*data_ptr++, &ssp_regs->hw_ssp_data);
+ data_count -= 4;
+ timeout = MXSMMC_MAX_TIMEOUT;
+ } else
+ udelay(1000);
+ }
+ }
+
+ return timeout ? 0 : COMM_ERR;
+}
+
+static int mxsmmc_send_cmd_dma(struct mxsmmc_priv *priv, struct mmc_data *data)
+{
+ uint32_t data_count = data->blocksize * data->blocks;
+ int dmach;
+ struct mxs_dma_desc *desc = priv->desc;
+ void *addr;
+ unsigned int flags;
+ struct bounce_buffer bbstate;
+
+ memset(desc, 0, sizeof(struct mxs_dma_desc));
+ desc->address = (dma_addr_t)desc;
+
+ if (data->flags & MMC_DATA_READ) {
+ priv->desc->cmd.data = MXS_DMA_DESC_COMMAND_DMA_WRITE;
+ addr = data->dest;
+ flags = GEN_BB_WRITE;
+ } else {
+ priv->desc->cmd.data = MXS_DMA_DESC_COMMAND_DMA_READ;
+ addr = (void *)data->src;
+ flags = GEN_BB_READ;
+ }
+
+ bounce_buffer_start(&bbstate, addr, data_count, flags);
+
+ priv->desc->cmd.address = (dma_addr_t)bbstate.bounce_buffer;
+
+ priv->desc->cmd.data |= MXS_DMA_DESC_IRQ | MXS_DMA_DESC_DEC_SEM |
+ (data_count << MXS_DMA_DESC_BYTES_OFFSET);
+
+ dmach = MXS_DMA_CHANNEL_AHB_APBH_SSP0 + priv->id;
+ mxs_dma_desc_append(dmach, priv->desc);
+ if (mxs_dma_go(dmach)) {
+ bounce_buffer_stop(&bbstate);
+ return COMM_ERR;
+ }
+
+ bounce_buffer_stop(&bbstate);
+
+ return 0;
+}
/*
* Sends a command out on the bus. Takes the mmc pointer,
mxsmmc_send_cmd(struct mmc *mmc, struct mmc_cmd *cmd, struct mmc_data *data)
{
struct mxsmmc_priv *priv = (struct mxsmmc_priv *)mmc->priv;
- struct mx28_ssp_regs *ssp_regs = priv->regs;
+ struct mxs_ssp_regs *ssp_regs = priv->regs;
uint32_t reg;
int timeout;
- uint32_t data_count;
- uint32_t *data_ptr;
uint32_t ctrl0;
+ int ret;
debug("MMC%d: CMD%d\n", mmc->block_dev.dev, cmd->cmdidx);
}
/* See if card is present */
- if (readl(&ssp_regs->hw_ssp_status) & SSP_STATUS_CARD_DETECT) {
+ if (!mxsmmc_cd(priv)) {
printf("MMC%d: No card detected!\n", mmc->block_dev.dev);
return NO_CARD_ERR;
}
if (cmd->resp_type & MMC_RSP_136) /* It's a 136 bits response */
ctrl0 |= SSP_CTRL0_LONG_RESP;
+ if (data && (data->blocksize * data->blocks < MXSMMC_SMALL_TRANSFER))
+ writel(SSP_CTRL1_DMA_ENABLE, &ssp_regs->hw_ssp_ctrl1_clr);
+ else
+ writel(SSP_CTRL1_DMA_ENABLE, &ssp_regs->hw_ssp_ctrl1_set);
+
/* Command index */
reg = readl(&ssp_regs->hw_ssp_cmd0);
reg &= ~(SSP_CMD0_CMD_MASK | SSP_CMD0_APPEND_8CYC);
/* READ or WRITE */
if (data->flags & MMC_DATA_READ) {
ctrl0 |= SSP_CTRL0_READ;
- } else if (priv->mmc_is_wp(mmc->block_dev.dev)) {
+ } else if (priv->mmc_is_wp &&
+ priv->mmc_is_wp(mmc->block_dev.dev)) {
printf("MMC%d: Can not write a locked card!\n",
mmc->block_dev.dev);
return UNUSABLE_ERR;
}
ctrl0 |= SSP_CTRL0_DATA_XFER;
+
+ reg = data->blocksize * data->blocks;
+#if defined(CONFIG_MX23)
+ ctrl0 |= reg & SSP_CTRL0_XFER_COUNT_MASK;
+
+ clrsetbits_le32(&ssp_regs->hw_ssp_cmd0,
+ SSP_CMD0_BLOCK_SIZE_MASK | SSP_CMD0_BLOCK_COUNT_MASK,
+ ((data->blocks - 1) << SSP_CMD0_BLOCK_COUNT_OFFSET) |
+ ((ffs(data->blocksize) - 1) <<
+ SSP_CMD0_BLOCK_SIZE_OFFSET));
+#elif defined(CONFIG_MX28)
+ writel(reg, &ssp_regs->hw_ssp_xfer_size);
+
reg = ((data->blocks - 1) <<
SSP_BLOCK_SIZE_BLOCK_COUNT_OFFSET) |
((ffs(data->blocksize) - 1) <<
SSP_BLOCK_SIZE_BLOCK_SIZE_OFFSET);
writel(reg, &ssp_regs->hw_ssp_block_size);
-
- reg = data->blocksize * data->blocks;
- writel(reg, &ssp_regs->hw_ssp_xfer_size);
+#endif
}
/* Kick off the command */
if (!data)
return 0;
- /* Process the data */
- data_count = data->blocksize * data->blocks;
- timeout = MXSMMC_MAX_TIMEOUT;
- if (data->flags & MMC_DATA_READ) {
- data_ptr = (uint32_t *)data->dest;
- while (data_count && --timeout) {
- reg = readl(&ssp_regs->hw_ssp_status);
- if (!(reg & SSP_STATUS_FIFO_EMPTY)) {
- *data_ptr++ = readl(&ssp_regs->hw_ssp_data);
- data_count -= 4;
- timeout = MXSMMC_MAX_TIMEOUT;
- } else
- udelay(1000);
+ if (data->blocksize * data->blocks < MXSMMC_SMALL_TRANSFER) {
+ ret = mxsmmc_send_cmd_pio(priv, data);
+ if (ret) {
+ printf("MMC%d: Data timeout with command %d "
+ "(status 0x%08x)!\n",
+ mmc->block_dev.dev, cmd->cmdidx, reg);
+ return ret;
}
} else {
- data_ptr = (uint32_t *)data->src;
- timeout *= 100;
- while (data_count && --timeout) {
- reg = readl(&ssp_regs->hw_ssp_status);
- if (!(reg & SSP_STATUS_FIFO_FULL)) {
- writel(*data_ptr++, &ssp_regs->hw_ssp_data);
- data_count -= 4;
- timeout = MXSMMC_MAX_TIMEOUT;
- } else
- udelay(1000);
+ ret = mxsmmc_send_cmd_dma(priv, data);
+ if (ret) {
+ printf("MMC%d: DMA transfer failed\n",
+ mmc->block_dev.dev);
+ return ret;
}
}
- if (!timeout) {
- printf("MMC%d: Data timeout with command %d (status 0x%08x)!\n",
- mmc->block_dev.dev, cmd->cmdidx, reg);
- return COMM_ERR;
- }
-
/* Check data errors */
reg = readl(&ssp_regs->hw_ssp_status);
if (reg &
static void mxsmmc_set_ios(struct mmc *mmc)
{
struct mxsmmc_priv *priv = (struct mxsmmc_priv *)mmc->priv;
- struct mx28_ssp_regs *ssp_regs = priv->regs;
+ struct mxs_ssp_regs *ssp_regs = priv->regs;
/* Set the clock speed */
if (mmc->clock)
- mx28_set_ssp_busclock(priv->id, mmc->clock / 1000);
+ mxs_set_ssp_busclock(priv->id, mmc->clock / 1000);
switch (mmc->bus_width) {
case 1:
static int mxsmmc_init(struct mmc *mmc)
{
struct mxsmmc_priv *priv = (struct mxsmmc_priv *)mmc->priv;
- struct mx28_ssp_regs *ssp_regs = priv->regs;
+ struct mxs_ssp_regs *ssp_regs = priv->regs;
/* Reset SSP */
- mx28_reset_block(&ssp_regs->hw_ssp_ctrl0_reg);
-
- /* 8 bits word length in MMC mode */
- clrsetbits_le32(&ssp_regs->hw_ssp_ctrl1,
- SSP_CTRL1_SSP_MODE_MASK | SSP_CTRL1_WORD_LENGTH_MASK,
- SSP_CTRL1_SSP_MODE_SD_MMC | SSP_CTRL1_WORD_LENGTH_EIGHT_BITS);
+ mxs_reset_block(&ssp_regs->hw_ssp_ctrl0_reg);
+
+ /* Reconfigure the SSP block for MMC operation */
+ writel(SSP_CTRL1_SSP_MODE_SD_MMC |
+ SSP_CTRL1_WORD_LENGTH_EIGHT_BITS |
+ SSP_CTRL1_DMA_ENABLE |
+ SSP_CTRL1_POLARITY |
+ SSP_CTRL1_RECV_TIMEOUT_IRQ_EN |
+ SSP_CTRL1_DATA_CRC_IRQ_EN |
+ SSP_CTRL1_DATA_TIMEOUT_IRQ_EN |
+ SSP_CTRL1_RESP_TIMEOUT_IRQ_EN |
+ SSP_CTRL1_RESP_ERR_IRQ_EN,
+ &ssp_regs->hw_ssp_ctrl1_set);
/* Set initial bit clock 400 KHz */
- mx28_set_ssp_busclock(priv->id, 400);
+ mxs_set_ssp_busclock(priv->id, 400);
/* Send initial 74 clock cycles (185 us @ 400 KHz)*/
writel(SSP_CMD0_CONT_CLKING_EN, &ssp_regs->hw_ssp_cmd0_set);
return 0;
}
-int mxsmmc_initialize(bd_t *bis, int id, int (*wp)(int))
+int mxsmmc_initialize(bd_t *bis, int id, int (*wp)(int), int (*cd)(int))
{
- struct mx28_clkctrl_regs *clkctrl_regs =
- (struct mx28_clkctrl_regs *)MXS_CLKCTRL_BASE;
struct mmc *mmc = NULL;
struct mxsmmc_priv *priv = NULL;
+ int ret;
+ const unsigned int mxsmmc_clk_id = mxs_ssp_clock_by_bus(id);
+
+ if (!mxs_ssp_bus_id_valid(id))
+ return -ENODEV;
mmc = malloc(sizeof(struct mmc));
if (!mmc)
return -ENOMEM;
}
+ priv->desc = mxs_dma_desc_alloc();
+ if (!priv->desc) {
+ free(priv);
+ free(mmc);
+ return -ENOMEM;
+ }
+
+ ret = mxs_dma_init_channel(MXS_DMA_CHANNEL_AHB_APBH_SSP0 + id);
+ if (ret)
+ return ret;
+
priv->mmc_is_wp = wp;
+ priv->mmc_cd = cd;
priv->id = id;
- switch (id) {
- case 0:
- priv->regs = (struct mx28_ssp_regs *)MXS_SSP0_BASE;
- priv->clkseq_bypass = CLKCTRL_CLKSEQ_BYPASS_SSP0;
- priv->clkctrl_ssp = &clkctrl_regs->hw_clkctrl_ssp0;
- break;
- case 1:
- priv->regs = (struct mx28_ssp_regs *)MXS_SSP1_BASE;
- priv->clkseq_bypass = CLKCTRL_CLKSEQ_BYPASS_SSP1;
- priv->clkctrl_ssp = &clkctrl_regs->hw_clkctrl_ssp1;
- break;
- case 2:
- priv->regs = (struct mx28_ssp_regs *)MXS_SSP2_BASE;
- priv->clkseq_bypass = CLKCTRL_CLKSEQ_BYPASS_SSP2;
- priv->clkctrl_ssp = &clkctrl_regs->hw_clkctrl_ssp2;
- break;
- case 3:
- priv->regs = (struct mx28_ssp_regs *)MXS_SSP3_BASE;
- priv->clkseq_bypass = CLKCTRL_CLKSEQ_BYPASS_SSP3;
- priv->clkctrl_ssp = &clkctrl_regs->hw_clkctrl_ssp3;
- break;
- }
+ priv->regs = mxs_ssp_regs_by_bus(id);
sprintf(mmc->name, "MXS MMC");
mmc->send_cmd = mxsmmc_send_cmd;
mmc->set_ios = mxsmmc_set_ios;
mmc->init = mxsmmc_init;
mmc->getcd = NULL;
+ mmc->getwp = NULL;
mmc->priv = priv;
mmc->voltages = MMC_VDD_32_33 | MMC_VDD_33_34;
* CLOCK_RATE could be any integer from 0 to 255.
*/
mmc->f_min = 400000;
- mmc->f_max = mxc_get_clock(MXC_SSP0_CLK + id) * 1000 / 2;
- mmc->b_max = 0;
+ mmc->f_max = mxc_get_clock(MXC_SSP0_CLK + mxsmmc_clk_id) * 1000 / 2;
+ mmc->b_max = 0x20;
mmc_register(mmc);
return 0;
projects / karo-tx-uboot.git / blobdiff