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path: root/drivers/mmc/fsl_esdhc.c
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Diffstat (limited to 'drivers/mmc/fsl_esdhc.c')
-rw-r--r--drivers/mmc/fsl_esdhc.c149
1 files changed, 101 insertions, 48 deletions
diff --git a/drivers/mmc/fsl_esdhc.c b/drivers/mmc/fsl_esdhc.c
index c6e9e6e782..e665b5ebd8 100644
--- a/drivers/mmc/fsl_esdhc.c
+++ b/drivers/mmc/fsl_esdhc.c
@@ -37,7 +37,6 @@
#include <fdt_support.h>
#include <asm/io.h>
-
DECLARE_GLOBAL_DATA_PTR;
struct fsl_esdhc {
@@ -102,7 +101,8 @@ static int esdhc_setup_data(struct mmc *mmc, struct mmc_data *data)
{
uint wml_value;
int timeout;
- struct fsl_esdhc *regs = mmc->priv;
+ struct fsl_esdhc_cfg *cfg = (struct fsl_esdhc_cfg *)mmc->priv;
+ struct fsl_esdhc *regs = (struct fsl_esdhc *)cfg->esdhc_base;
wml_value = data->blocksize/4;
@@ -112,24 +112,24 @@ static int esdhc_setup_data(struct mmc *mmc, struct mmc_data *data)
wml_value = 0x100000 | wml_value;
- out_be32(&regs->dsaddr, (u32)data->dest);
+ esdhc_write32(&regs->dsaddr, (u32)data->dest);
} else {
if (wml_value > 0x80)
wml_value = 0x80;
- if ((in_be32(&regs->prsstat) & PRSSTAT_WPSPL) == 0) {
+ if ((esdhc_read32(&regs->prsstat) & PRSSTAT_WPSPL) == 0) {
printf("\nThe SD card is locked. Can not write to a locked card.\n\n");
return TIMEOUT;
}
wml_value = wml_value << 16 | 0x10;
- out_be32(&regs->dsaddr, (u32)data->src);
+ esdhc_write32(&regs->dsaddr, (u32)data->src);
}
- out_be32(&regs->wml, wml_value);
+ esdhc_write32(&regs->wml, wml_value);
- out_be32(&regs->blkattr, data->blocks << 16 | data->blocksize);
+ esdhc_write32(&regs->blkattr, data->blocks << 16 | data->blocksize);
/* Calculate the timeout period for data transactions */
- timeout = __ilog2(mmc->tran_speed/10);
+ timeout = fls(mmc->tran_speed/10) - 1;
timeout -= 13;
if (timeout > 14)
@@ -138,7 +138,7 @@ static int esdhc_setup_data(struct mmc *mmc, struct mmc_data *data)
if (timeout < 0)
timeout = 0;
- clrsetbits_be32(&regs->sysctl, SYSCTL_TIMEOUT_MASK, timeout << 16);
+ esdhc_clrsetbits32(&regs->sysctl, SYSCTL_TIMEOUT_MASK, timeout << 16);
return 0;
}
@@ -153,17 +153,20 @@ esdhc_send_cmd(struct mmc *mmc, struct mmc_cmd *cmd, struct mmc_data *data)
{
uint xfertyp;
uint irqstat;
- volatile struct fsl_esdhc *regs = mmc->priv;
+ struct fsl_esdhc_cfg *cfg = (struct fsl_esdhc_cfg *)mmc->priv;
+ volatile struct fsl_esdhc *regs = (struct fsl_esdhc *)cfg->esdhc_base;
- out_be32(&regs->irqstat, -1);
+ esdhc_write32(&regs->irqstat, -1);
sync();
/* Wait for the bus to be idle */
- while ((in_be32(&regs->prsstat) & PRSSTAT_CICHB) ||
- (in_be32(&regs->prsstat) & PRSSTAT_CIDHB));
+ while ((esdhc_read32(&regs->prsstat) & PRSSTAT_CICHB) ||
+ (esdhc_read32(&regs->prsstat) & PRSSTAT_CIDHB))
+ ;
- while (in_be32(&regs->prsstat) & PRSSTAT_DLA);
+ while (esdhc_read32(&regs->prsstat) & PRSSTAT_DLA)
+ ;
/* Wait at least 8 SD clock cycles before the next command */
/*
@@ -185,14 +188,15 @@ esdhc_send_cmd(struct mmc *mmc, struct mmc_cmd *cmd, struct mmc_data *data)
xfertyp = esdhc_xfertyp(cmd, data);
/* Send the command */
- out_be32(&regs->cmdarg, cmd->cmdarg);
- out_be32(&regs->xfertyp, xfertyp);
+ esdhc_write32(&regs->cmdarg, cmd->cmdarg);
+ esdhc_write32(&regs->xfertyp, xfertyp);
/* Wait for the command to complete */
- while (!(in_be32(&regs->irqstat) & IRQSTAT_CC));
+ while (!(esdhc_read32(&regs->irqstat) & IRQSTAT_CC))
+ ;
- irqstat = in_be32(&regs->irqstat);
- out_be32(&regs->irqstat, irqstat);
+ irqstat = esdhc_read32(&regs->irqstat);
+ esdhc_write32(&regs->irqstat, irqstat);
if (irqstat & CMD_ERR)
return COMM_ERR;
@@ -204,21 +208,21 @@ esdhc_send_cmd(struct mmc *mmc, struct mmc_cmd *cmd, struct mmc_data *data)
if (cmd->resp_type & MMC_RSP_136) {
u32 cmdrsp3, cmdrsp2, cmdrsp1, cmdrsp0;
- cmdrsp3 = in_be32(&regs->cmdrsp3);
- cmdrsp2 = in_be32(&regs->cmdrsp2);
- cmdrsp1 = in_be32(&regs->cmdrsp1);
- cmdrsp0 = in_be32(&regs->cmdrsp0);
+ cmdrsp3 = esdhc_read32(&regs->cmdrsp3);
+ cmdrsp2 = esdhc_read32(&regs->cmdrsp2);
+ cmdrsp1 = esdhc_read32(&regs->cmdrsp1);
+ cmdrsp0 = esdhc_read32(&regs->cmdrsp0);
cmd->response[0] = (cmdrsp3 << 8) | (cmdrsp2 >> 24);
cmd->response[1] = (cmdrsp2 << 8) | (cmdrsp1 >> 24);
cmd->response[2] = (cmdrsp1 << 8) | (cmdrsp0 >> 24);
cmd->response[3] = (cmdrsp0 << 8);
} else
- cmd->response[0] = in_be32(&regs->cmdrsp0);
+ cmd->response[0] = esdhc_read32(&regs->cmdrsp0);
/* Wait until all of the blocks are transferred */
if (data) {
do {
- irqstat = in_be32(&regs->irqstat);
+ irqstat = esdhc_read32(&regs->irqstat);
if (irqstat & DATA_ERR)
return COMM_ERR;
@@ -226,10 +230,10 @@ esdhc_send_cmd(struct mmc *mmc, struct mmc_cmd *cmd, struct mmc_data *data)
if (irqstat & IRQSTAT_DTOE)
return TIMEOUT;
} while (!(irqstat & IRQSTAT_TC) &&
- (in_be32(&regs->prsstat) & PRSSTAT_DLA));
+ (esdhc_read32(&regs->prsstat) & PRSSTAT_DLA));
}
- out_be32(&regs->irqstat, -1);
+ esdhc_write32(&regs->irqstat, -1);
return 0;
}
@@ -238,9 +242,13 @@ void set_sysctl(struct mmc *mmc, uint clock)
{
int sdhc_clk = gd->sdhc_clk;
int div, pre_div;
- volatile struct fsl_esdhc *regs = mmc->priv;
+ struct fsl_esdhc_cfg *cfg = (struct fsl_esdhc_cfg *)mmc->priv;
+ volatile struct fsl_esdhc *regs = (struct fsl_esdhc *)cfg->esdhc_base;
uint clk;
+ if (clock < mmc->f_min)
+ clock = mmc->f_min;
+
if (sdhc_clk / 16 > clock) {
for (pre_div = 2; pre_div < 256; pre_div *= 2)
if ((sdhc_clk / pre_div) <= (clock * 16))
@@ -257,67 +265,105 @@ void set_sysctl(struct mmc *mmc, uint clock)
clk = (pre_div << 8) | (div << 4);
- clrsetbits_be32(&regs->sysctl, SYSCTL_CLOCK_MASK, clk);
+ /* On imx the clock must be stopped before changing frequency */
+ if (cfg->clk_enable)
+ esdhc_clrbits32(&regs->sysctl, SYSCTL_CKEN);
+
+ esdhc_clrsetbits32(&regs->sysctl, SYSCTL_CLOCK_MASK, clk);
udelay(10000);
- setbits_be32(&regs->sysctl, SYSCTL_PEREN);
+ clk = SYSCTL_PEREN;
+ /* On imx systems the clock must be explicitely enabled */
+ if (cfg->clk_enable)
+ clk |= SYSCTL_CKEN;
+
+ esdhc_setbits32(&regs->sysctl, clk);
}
static void esdhc_set_ios(struct mmc *mmc)
{
- struct fsl_esdhc *regs = mmc->priv;
+ struct fsl_esdhc_cfg *cfg = (struct fsl_esdhc_cfg *)mmc->priv;
+ struct fsl_esdhc *regs = (struct fsl_esdhc *)cfg->esdhc_base;
/* Set the clock speed */
set_sysctl(mmc, mmc->clock);
/* Set the bus width */
- clrbits_be32(&regs->proctl, PROCTL_DTW_4 | PROCTL_DTW_8);
+ esdhc_clrbits32(&regs->proctl, PROCTL_DTW_4 | PROCTL_DTW_8);
if (mmc->bus_width == 4)
- setbits_be32(&regs->proctl, PROCTL_DTW_4);
+ esdhc_setbits32(&regs->proctl, PROCTL_DTW_4);
else if (mmc->bus_width == 8)
- setbits_be32(&regs->proctl, PROCTL_DTW_8);
+ esdhc_setbits32(&regs->proctl, PROCTL_DTW_8);
+
}
static int esdhc_init(struct mmc *mmc)
{
- struct fsl_esdhc *regs = mmc->priv;
+ struct fsl_esdhc_cfg *cfg = (struct fsl_esdhc_cfg *)mmc->priv;
+ struct fsl_esdhc *regs = (struct fsl_esdhc *)cfg->esdhc_base;
int timeout = 1000;
+ int ret = 0;
+ u8 card_absent;
/* Enable cache snooping */
- out_be32(&regs->scr, 0x00000040);
+ if (cfg && !cfg->no_snoop)
+ esdhc_write32(&regs->scr, 0x00000040);
+
+ /* Reset the entire host controller */
+ esdhc_write32(&regs->sysctl, SYSCTL_RSTA);
+
+ /* Wait until the controller is available */
+ while ((esdhc_read32(&regs->sysctl) & SYSCTL_RSTA) && --timeout)
+ udelay(1000);
- out_be32(&regs->sysctl, SYSCTL_HCKEN | SYSCTL_IPGEN);
+ esdhc_write32(&regs->sysctl, SYSCTL_HCKEN | SYSCTL_IPGEN);
/* Set the initial clock speed */
set_sysctl(mmc, 400000);
/* Disable the BRR and BWR bits in IRQSTAT */
- clrbits_be32(&regs->irqstaten, IRQSTATEN_BRR | IRQSTATEN_BWR);
+ esdhc_clrbits32(&regs->irqstaten, IRQSTATEN_BRR | IRQSTATEN_BWR);
/* Put the PROCTL reg back to the default */
- out_be32(&regs->proctl, PROCTL_INIT);
+ esdhc_write32(&regs->proctl, PROCTL_INIT);
- while (!(in_be32(&regs->prsstat) & PRSSTAT_CINS) && --timeout)
- udelay(1000);
+ /* Set timout to the maximum value */
+ esdhc_clrsetbits32(&regs->sysctl, SYSCTL_TIMEOUT_MASK, 14 << 16);
- if (timeout <= 0)
- return NO_CARD_ERR;
+ /* Check if there is a callback for detecting the card */
+ if (board_mmc_getcd(&card_absent, mmc)) {
+ timeout = 1000;
+ while (!(esdhc_read32(&regs->prsstat) & PRSSTAT_CINS) &&
+ --timeout)
+ udelay(1000);
- return 0;
+ if (timeout <= 0)
+ ret = NO_CARD_ERR;
+ } else {
+ if (card_absent)
+ ret = NO_CARD_ERR;
+ }
+
+ return ret;
}
-static int esdhc_initialize(bd_t *bis)
+int fsl_esdhc_initialize(bd_t *bis, struct fsl_esdhc_cfg *cfg)
{
- struct fsl_esdhc *regs = (struct fsl_esdhc *)CONFIG_SYS_FSL_ESDHC_ADDR;
+ struct fsl_esdhc *regs;
struct mmc *mmc;
u32 caps;
+ if (!cfg)
+ return -1;
+
mmc = malloc(sizeof(struct mmc));
sprintf(mmc->name, "FSL_ESDHC");
- mmc->priv = regs;
+ regs = (struct fsl_esdhc *)cfg->esdhc_base;
+
+ mmc->priv = cfg;
mmc->send_cmd = esdhc_send_cmd;
mmc->set_ios = esdhc_set_ios;
mmc->init = esdhc_init;
@@ -346,9 +392,15 @@ static int esdhc_initialize(bd_t *bis)
int fsl_esdhc_mmc_init(bd_t *bis)
{
- return esdhc_initialize(bis);
+ struct fsl_esdhc_cfg *cfg;
+
+ cfg = malloc(sizeof(struct fsl_esdhc_cfg));
+ memset(cfg, 0, sizeof(struct fsl_esdhc_cfg));
+ cfg->esdhc_base = CONFIG_SYS_FSL_ESDHC_ADDR;
+ return fsl_esdhc_initialize(bis, cfg);
}
+#ifdef CONFIG_OF_LIBFDT
void fdt_fixup_esdhc(void *blob, bd_t *bd)
{
const char *compat = "fsl,esdhc";
@@ -365,3 +417,4 @@ out:
do_fixup_by_compat(blob, compat, "status", status,
strlen(status) + 1, 1);
}
+#endif
generated by cgit v1.2.3 (git 2.0.4) at 2024-06-11 22:56:15 +0000