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authorMario Schuknecht <mario.schuknecht@dresearch-fe.de>2014-08-25 14:12:26 +0200
committerPantelis Antoniou <panto@antoniou-consulting.com>2014-10-03 17:26:50 +0300
commitbcd06989b860c691f5afbd1c03d1b0d9e9970cdc (patch)
tree1431644e104980426234cc2af1e8a80959d7f0b0 /drivers/mmc
parent19345d7c9483b84578da5206b3c604b534121d88 (diff)
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mvebu_mmc: Driver addition
In function mvebu_mmc_write notice command timeout. It is possible that a command is done, but a timeout occurred. Enable timeout in set bus function. Set window registers. Without that I could not use the driver on a Kirkwood 88F6282 SoC. Set high capacity and 52MHz driver feature. Signed-off-by: Mario Schuknecht <mario.schuknecht@dresearch-fe.de> Reviewed-by: Stefan Roese <sr@denx.de> Acked-by: Pantelis Antoniou <panto@antoniou-consulting.com>
Diffstat (limited to 'drivers/mmc')
-rw-r--r--drivers/mmc/mvebu_mmc.c62
1 files changed, 61 insertions, 1 deletions
diff --git a/drivers/mmc/mvebu_mmc.c b/drivers/mmc/mvebu_mmc.c
index 9759198..d34e743 100644
--- a/drivers/mmc/mvebu_mmc.c
+++ b/drivers/mmc/mvebu_mmc.c
@@ -17,8 +17,12 @@
#include <asm/arch/kirkwood.h>
#include <mvebu_mmc.h>
+DECLARE_GLOBAL_DATA_PTR;
+
#define DRIVER_NAME "MVEBU_MMC"
+#define MVEBU_TARGET_DRAM 0
+
static void mvebu_mmc_write(u32 offs, u32 val)
{
writel(val, CONFIG_SYS_MMC_BASE + (offs));
@@ -164,6 +168,9 @@ static int mvebu_mmc_send_cmd(struct mmc *mmc, struct mmc_cmd *cmd,
return TIMEOUT;
}
}
+ if (mvebu_mmc_read(SDIO_ERR_INTR_STATUS) &
+ (SDIO_ERR_CMD_TIMEOUT | SDIO_ERR_DATA_TIMEOUT))
+ return TIMEOUT;
/* Handling response */
if (cmd->resp_type & MMC_RSP_136) {
@@ -271,6 +278,7 @@ static void mvebu_mmc_set_bus(unsigned int bus)
/* default to maximum timeout */
ctrl_reg |= SDIO_HOST_CTRL_TMOUT(SDIO_HOST_CTRL_TMOUT_MAX);
+ ctrl_reg |= SDIO_HOST_CTRL_TMOUT_EN;
ctrl_reg |= SDIO_HOST_CTRL_PUSH_PULL_EN;
@@ -296,6 +304,55 @@ static void mvebu_mmc_set_ios(struct mmc *mmc)
mvebu_mmc_set_clk(mmc->clock);
}
+/*
+ * Set window register.
+ */
+static void mvebu_window_setup(void)
+{
+ int i;
+
+ for (i = 0; i < 4; i++) {
+ mvebu_mmc_write(WINDOW_CTRL(i), 0);
+ mvebu_mmc_write(WINDOW_BASE(i), 0);
+ }
+ for (i = 0; i < CONFIG_NR_DRAM_BANKS; i++) {
+ u32 size, base, attrib;
+
+ /* Enable DRAM bank */
+ switch (i) {
+ case 0:
+ attrib = KWCPU_ATTR_DRAM_CS0;
+ break;
+ case 1:
+ attrib = KWCPU_ATTR_DRAM_CS1;
+ break;
+ case 2:
+ attrib = KWCPU_ATTR_DRAM_CS2;
+ break;
+ case 3:
+ attrib = KWCPU_ATTR_DRAM_CS3;
+ break;
+ default:
+ /* invalide bank, disable access */
+ attrib = 0;
+ break;
+ }
+
+ size = gd->bd->bi_dram[i].size;
+ base = gd->bd->bi_dram[i].start;
+ if (size && attrib) {
+ mvebu_mmc_write(WINDOW_CTRL(i),
+ MVCPU_WIN_CTRL_DATA(size,
+ MVEBU_TARGET_DRAM,
+ attrib,
+ MVCPU_WIN_ENABLE));
+ } else {
+ mvebu_mmc_write(WINDOW_CTRL(i), MVCPU_WIN_DISABLE);
+ }
+ mvebu_mmc_write(WINDOW_BASE(i), base);
+ }
+}
+
static int mvebu_mmc_initialize(struct mmc *mmc)
{
debug("%s: mvebu_mmc_initialize", DRIVER_NAME);
@@ -322,6 +379,8 @@ static int mvebu_mmc_initialize(struct mmc *mmc)
mvebu_mmc_write(SDIO_NOR_INTR_EN, 0);
mvebu_mmc_write(SDIO_ERR_INTR_EN, 0);
+ mvebu_window_setup();
+
/* SW reset */
mvebu_mmc_write(SDIO_SW_RESET, SDIO_SW_RESET_NOW);
@@ -342,7 +401,8 @@ static struct mmc_config mvebu_mmc_cfg = {
.f_min = MVEBU_MMC_BASE_FAST_CLOCK / MVEBU_MMC_BASE_DIV_MAX,
.f_max = MVEBU_MMC_CLOCKRATE_MAX,
.voltages = MMC_VDD_32_33 | MMC_VDD_33_34,
- .host_caps = MMC_MODE_4BIT | MMC_MODE_HS,
+ .host_caps = MMC_MODE_4BIT | MMC_MODE_HS | MMC_MODE_HC |
+ MMC_MODE_HS_52MHz,
.part_type = PART_TYPE_DOS,
.b_max = CONFIG_SYS_MMC_MAX_BLK_COUNT,
};