Davinci MMCSD Support

Added support for MMC/SD cards for Davinci.  This feature is enabled by
CONFIG_DAVINCI_MMC and is dependant on CONFIG_MMC and CONFIG_GENERIC_MMC
options. This is tested on DM355 and DM365 EVMs with both the available mmc
controllers.

Signed-off-by: Alagu Sankar <alagusankar@embwise.com>
Signed-off-by: Sandeep Paulraj <s-paulraj@ti.com>

1 files changed, 175 insertions, 0 deletions

diff --git a/arch/arm/include/asm/arch-davinci/sdmmc_defs.h b/arch/arm/include/asm/arch-davinci/sdmmc_defs.h
new file mode 100644
index 0000000..853fd40
--- /dev/null
+++ b/arch/arm/include/asm/arch-davinci/sdmmc_defs.h
@@ -0,0 +1,175 @@
+/*
+ * Davinci MMC Controller Defines - Based on Linux davinci_mmc.c
+ *
+ * Copyright (C) 2010 Texas Instruments Incorporated
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#ifndef _SDMMC_DEFS_H_
+#define _SDMMC_DEFS_H_
+
+#include <asm/arch/hardware.h>
+
+/* MMC Control Reg fields */
+#define MMCCTL_DATRST		(1 << 0)
+#define MMCCTL_CMDRST		(1 << 1)
+#define MMCCTL_WIDTH_4_BIT	(1 << 2)
+#define MMCCTL_DATEG_DISABLED	(0 << 6)
+#define MMCCTL_DATEG_RISING	(1 << 6)
+#define MMCCTL_DATEG_FALLING	(2 << 6)
+#define MMCCTL_DATEG_BOTH	(3 << 6)
+#define MMCCTL_PERMDR_LE	(0 << 9)
+#define MMCCTL_PERMDR_BE	(1 << 9)
+#define MMCCTL_PERMDX_LE	(0 << 10)
+#define MMCCTL_PERMDX_BE	(1 << 10)
+
+/* MMC Clock Control Reg fields */
+#define MMCCLK_CLKEN		(1 << 8)
+#define MMCCLK_CLKRT_MASK	(0xFF << 0)
+
+/* MMC Status Reg0 fields */
+#define MMCST0_DATDNE		(1 << 0)
+#define MMCST0_BSYDNE		(1 << 1)
+#define MMCST0_RSPDNE		(1 << 2)
+#define MMCST0_TOUTRD		(1 << 3)
+#define MMCST0_TOUTRS		(1 << 4)
+#define MMCST0_CRCWR		(1 << 5)
+#define MMCST0_CRCRD		(1 << 6)
+#define MMCST0_CRCRS		(1 << 7)
+#define MMCST0_DXRDY		(1 << 9)
+#define MMCST0_DRRDY		(1 << 10)
+#define MMCST0_DATED		(1 << 11)
+#define MMCST0_TRNDNE		(1 << 12)
+
+#define MMCST0_ERR_MASK		(0x00F8)
+
+/* MMC Status Reg1 fields */
+#define MMCST1_BUSY		(1 << 0)
+#define MMCST1_CLKSTP		(1 << 1)
+#define MMCST1_DXEMP		(1 << 2)
+#define MMCST1_DRFUL		(1 << 3)
+#define MMCST1_DAT3ST		(1 << 4)
+#define MMCST1_FIFOEMP		(1 << 5)
+#define MMCST1_FIFOFUL		(1 << 6)
+
+/* MMC INT Mask Reg fields */
+#define MMCIM_EDATDNE		(1 << 0)
+#define MMCIM_EBSYDNE		(1 << 1)
+#define MMCIM_ERSPDNE		(1 << 2)
+#define MMCIM_ETOUTRD		(1 << 3)
+#define MMCIM_ETOUTRS		(1 << 4)
+#define MMCIM_ECRCWR		(1 << 5)
+#define MMCIM_ECRCRD		(1 << 6)
+#define MMCIM_ECRCRS		(1 << 7)
+#define MMCIM_EDXRDY		(1 << 9)
+#define MMCIM_EDRRDY		(1 << 10)
+#define MMCIM_EDATED		(1 << 11)
+#define MMCIM_ETRNDNE		(1 << 12)
+
+#define MMCIM_MASKALL		(0xFFFFFFFF)
+
+/* MMC Resp Tout Reg fields */
+#define MMCTOR_TOR_MASK		(0xFF)		/* dont write to reg, | it */
+#define MMCTOR_TOD_20_16_SHIFT  (8)
+
+/* MMC Data Read Tout Reg fields */
+#define MMCTOD_TOD_0_15_MASK	(0xFFFF)
+
+/* MMC Block len Reg fields */
+#define MMCBLEN_BLEN_MASK	(0xFFF)
+
+/* MMC Num Blocks Reg fields */
+#define MMCNBLK_NBLK_MASK	(0xFFFF)
+#define MMCNBLK_NBLK_MAX	(0xFFFF)
+
+/* MMC Num Blocks Counter Reg fields */
+#define MMCNBLC_NBLC_MASK	(0xFFFF)
+
+/* MMC Cmd Reg fields */
+#define MMCCMD_CMD_MASK		(0x3F)
+#define MMCCMD_PPLEN		(1 << 7)
+#define MMCCMD_BSYEXP		(1 << 8)
+#define MMCCMD_RSPFMT_NONE	(0 << 9)
+#define MMCCMD_RSPFMT_R1567	(1 << 9)
+#define MMCCMD_RSPFMT_R2	(2 << 9)
+#define MMCCMD_RSPFMT_R3	(3 << 9)
+#define MMCCMD_DTRW		(1 << 11)
+#define MMCCMD_STRMTP		(1 << 12)
+#define MMCCMD_WDATX		(1 << 13)
+#define MMCCMD_INITCK		(1 << 14)
+#define MMCCMD_DCLR		(1 << 15)
+#define MMCCMD_DMATRIG		(1 << 16)
+
+/* FIFO control Reg fields */
+#define MMCFIFOCTL_FIFORST	(1 << 0)
+#define MMCFIFOCTL_FIFODIR	(1 << 1)
+#define MMCFIFOCTL_FIFOLEV	(1 << 2)
+#define MMCFIFOCTL_ACCWD_4	(0 << 3)	/* access width of 4 bytes */
+#define MMCFIFOCTL_ACCWD_3	(1 << 3)	/* access width of 3 bytes */
+#define MMCFIFOCTL_ACCWD_2	(2 << 3)	/* access width of 2 bytes */
+#define MMCFIFOCTL_ACCWD_1	(3 << 3)	/* access width of 1 byte */
+
+/* Davinci MMC Register definitions */
+struct davinci_mmc_regs {
+	dv_reg mmcctl;
+	dv_reg mmcclk;
+	dv_reg mmcst0;
+	dv_reg mmcst1;
+	dv_reg mmcim;
+	dv_reg mmctor;
+	dv_reg mmctod;
+	dv_reg mmcblen;
+	dv_reg mmcnblk;
+	dv_reg mmcnblc;
+	dv_reg mmcdrr;
+	dv_reg mmcdxr;
+	dv_reg mmccmd;
+	dv_reg mmcarghl;
+	dv_reg mmcrsp01;
+	dv_reg mmcrsp23;
+	dv_reg mmcrsp45;
+	dv_reg mmcrsp67;
+	dv_reg mmcdrsp;
+	dv_reg mmcetok;
+	dv_reg mmccidx;
+	dv_reg mmcckc;
+	dv_reg mmctorc;
+	dv_reg mmctodc;
+	dv_reg mmcblnc;
+	dv_reg sdioctl;
+	dv_reg sdiost0;
+	dv_reg sdioien;
+	dv_reg sdioist;
+	dv_reg mmcfifoctl;
+};
+
+/* Davinci MMC board definitions */
+struct davinci_mmc {
+	struct davinci_mmc_regs *reg_base;	/* Register base address */
+	uint input_clk;		/* Input clock to MMC controller */
+	uint host_caps;		/* Host capabilities */
+	uint voltages;		/* Host supported voltages */
+	uint version;		/* MMC Controller version */
+};
+
+enum {
+	MMC_CTLR_VERSION_1 = 0,	/* DM644x and DM355 */
+	MMC_CTLR_VERSION_2,	/* DA830 */
+};
+
+int davinci_mmc_init(bd_t *bis, struct davinci_mmc *host);
+
+#endif /* _SDMMC_DEFS_H */