The patch titled
davinci: MMC: add support for 8bit MMC cards
has been removed from the -mm tree. Its filename was
davinci-mmc-add-support-for-8bit-mmc-cards.patch
This patch was dropped because it was merged into mainline or a subsystem tree
The current -mm tree may be found at http://userweb.kernel.org/~akpm/mmotm/
------------------------------------------------------
Subject: davinci: MMC: add support for 8bit MMC cards
From: Vipin Bhandari <vipin.bhandari@xxxxxx>
Add support for 8bit MMC cards. The controller data width is configurable
depending on the wires setting in the platform data structure.
MMC 8bit is tested on OMAPL137 and MMC 4bit is tested on OMAPL138 EVM.
Signed-off-by: Vipin Bhandari <vipin.bhandari@xxxxxx>
Cc: David Brownell <david-b@xxxxxxxxxxx>
Cc: Chaithrika U S <chaithrika@xxxxxx>
Cc: Sudhakar Rajashekhara <sudhakar.raj@xxxxxx>
Cc: <linux-mmc@xxxxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
drivers/mmc/host/davinci_mmc.c | 45 ++++++++++++++++++++++++-------
1 file changed, 35 insertions(+), 10 deletions(-)
diff -puN drivers/mmc/host/davinci_mmc.c~davinci-mmc-add-support-for-8bit-mmc-cards drivers/mmc/host/davinci_mmc.c
--- a/drivers/mmc/host/davinci_mmc.c~davinci-mmc-add-support-for-8bit-mmc-cards
+++ a/drivers/mmc/host/davinci_mmc.c
@@ -73,6 +73,7 @@
/* DAVINCI_MMCCTL definitions */
#define MMCCTL_DATRST (1 << 0)
#define MMCCTL_CMDRST (1 << 1)
+#define MMCCTL_WIDTH_8_BIT (1 << 8)
#define MMCCTL_WIDTH_4_BIT (1 << 2)
#define MMCCTL_DATEG_DISABLED (0 << 6)
#define MMCCTL_DATEG_RISING (1 << 6)
@@ -791,22 +792,42 @@ static void calculate_clk_divider(struct
static void mmc_davinci_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
{
- unsigned int mmc_pclk = 0;
struct mmc_davinci_host *host = mmc_priv(mmc);
- mmc_pclk = host->mmc_input_clk;
dev_dbg(mmc_dev(host->mmc),
"clock %dHz busmode %d powermode %d Vdd %04x\n",
ios->clock, ios->bus_mode, ios->power_mode,
ios->vdd);
- if (ios->bus_width == MMC_BUS_WIDTH_4) {
- dev_dbg(mmc_dev(host->mmc), "Enabling 4 bit mode\n");
- writel(readl(host->base + DAVINCI_MMCCTL) | MMCCTL_WIDTH_4_BIT,
- host->base + DAVINCI_MMCCTL);
- } else {
- dev_dbg(mmc_dev(host->mmc), "Disabling 4 bit mode\n");
- writel(readl(host->base + DAVINCI_MMCCTL) & ~MMCCTL_WIDTH_4_BIT,
+
+ switch (ios->bus_width) {
+ case MMC_BUS_WIDTH_8:
+ dev_dbg(mmc_dev(host->mmc), "Enabling 8 bit mode\n");
+ writel((readl(host->base + DAVINCI_MMCCTL) &
+ ~MMCCTL_WIDTH_4_BIT) | MMCCTL_WIDTH_8_BIT,
host->base + DAVINCI_MMCCTL);
+ break;
+ case MMC_BUS_WIDTH_4:
+ dev_dbg(mmc_dev(host->mmc), "Enabling 4 bit mode\n");
+ if (host->version == MMC_CTLR_VERSION_2)
+ writel((readl(host->base + DAVINCI_MMCCTL) &
+ ~MMCCTL_WIDTH_8_BIT) | MMCCTL_WIDTH_4_BIT,
+ host->base + DAVINCI_MMCCTL);
+ else
+ writel(readl(host->base + DAVINCI_MMCCTL) |
+ MMCCTL_WIDTH_4_BIT,
+ host->base + DAVINCI_MMCCTL);
+ break;
+ case MMC_BUS_WIDTH_1:
+ dev_dbg(mmc_dev(host->mmc), "Enabling 1 bit mode\n");
+ if (host->version == MMC_CTLR_VERSION_2)
+ writel(readl(host->base + DAVINCI_MMCCTL) &
+ ~(MMCCTL_WIDTH_8_BIT | MMCCTL_WIDTH_4_BIT),
+ host->base + DAVINCI_MMCCTL);
+ else
+ writel(readl(host->base + DAVINCI_MMCCTL) &
+ ~MMCCTL_WIDTH_4_BIT,
+ host->base + DAVINCI_MMCCTL);
+ break;
}
calculate_clk_divider(mmc, ios);
@@ -1189,10 +1210,14 @@ static int __init davinci_mmcsd_probe(st
/* REVISIT: someday, support IRQ-driven card detection. */
mmc->caps |= MMC_CAP_NEEDS_POLL;
+ mmc->caps |= MMC_CAP_WAIT_WHILE_BUSY;
- if (!pdata || pdata->wires == 4 || pdata->wires == 0)
+ if (pdata && (pdata->wires == 4 || pdata->wires == 0))
mmc->caps |= MMC_CAP_4_BIT_DATA;
+ if (pdata && (pdata->wires == 8))
+ mmc->caps |= (MMC_CAP_4_BIT_DATA | MMC_CAP_8_BIT_DATA);
+
host->version = pdata->version;
mmc->ops = &mmc_davinci_ops;
_
Patches currently in -mm which might be from vipin.bhandari@xxxxxx are
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