[U-Boot] [PATCH v2 06/10] ARM: sunxi-mmc: Add mmc support for sun6i / A31

Chen-Yu Tsai
2014-09-24T08:01:09Z

From: Hans de Goede <hdegoede@redhat.com>

The mmc hardware on sun6i has an extra reset control that needs to
be de-asserted prior to usage. Also the FIFO address is different.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
[wens at csie.org: use setbits_le32 for reset control, drop obsolete changes,
rewrite different FIFO address handling, add commit message]
Signed-off-by: Chen-Yu Tsai <wens@csie.org>
---
arch/arm/include/asm/arch-sunxi/mmc.h | 5 ++++-
drivers/mmc/sunxi_mmc.c | 11 +++++++----
2 files changed, 11 insertions(+), 5 deletions(-)

diff --git a/arch/arm/include/asm/arch-sunxi/mmc.h b/arch/arm/include/asm/arch-sunxi/mmc.h
index 53196e3..6a31184 100644
--- a/arch/arm/include/asm/arch-sunxi/mmc.h
+++ b/arch/arm/include/asm/arch-sunxi/mmc.h
@@ -43,7 +43,10 @@ struct sunxi_mmc {
u32 chda; /* 0x90 */
u32 cbda; /* 0x94 */
u32 res1[26];
- u32 fifo; /* 0x100 FIFO access address */
+#if defined(CONFIG_SUN6I)
+ u32 res2[64];
+#endif
+ u32 fifo; /* 0x100 (0x200 on sun6i) FIFO access address */
};

#define SUNXI_MMC_CLK_POWERSAVE (0x1 << 17)
diff --git a/drivers/mmc/sunxi_mmc.c b/drivers/mmc/sunxi_mmc.c
index d4e574f..1982988 100644
--- a/drivers/mmc/sunxi_mmc.c
+++ b/drivers/mmc/sunxi_mmc.c
@@ -19,7 +19,6 @@
struct sunxi_mmc_host {
unsigned mmc_no;
uint32_t *mclkreg;
- unsigned database;
unsigned fatal_err;
unsigned mod_clk;
struct sunxi_mmc *reg;
@@ -57,7 +56,6 @@ static int mmc_resource_init(int sdc_no)
printf("Wrong mmc number %d\n", sdc_no);
return -1;
}
- mmchost->database = (unsigned int)mmchost->reg + 0x100;
mmchost->mmc_no = sdc_no;

return 0;
@@ -75,6 +73,11 @@ static int mmc_clk_io_on(int sdc_no)
/* config ahb clock */
setbits_le32(&ccm->ahb_gate0, 1 << AHB_GATE_OFFSET_MMC(sdc_no));

+#if defined(CONFIG_SUN6I)
+ /* unassert reset */
+ setbits_le32(&ccm->ahb_reset0_cfg, 1 << AHB_RESET_OFFSET_MMC(sdc_no));
+#endif
+
/* config mod clock */
pll_clk = clock_get_pll6();
/* should be close to 100 MHz but no more, so round up */
@@ -194,9 +197,9 @@ static int mmc_trans_data_by_cpu(struct mmc *mmc, struct mmc_data *data)
}

if (reading)
- buff[i] = readl(mmchost->database);
+ buff[i] = readl(&mmchost->reg->fifo);
else
- writel(buff[i], mmchost->database);
+ writel(buff[i], &mmchost->reg->fifo);
}

return 0;
--
2.1.0