Initial import

1 files changed, 218 insertions, 0 deletions

diff --git a/include/linux/mmc/sh_mmcif.h b/include/linux/mmc/sh_mmcif.h
new file mode 100644
index 000000000..ccd8fb2ca
--- /dev/null
+++ b/include/linux/mmc/sh_mmcif.h
@@ -0,0 +1,218 @@
+/*
+ * include/linux/mmc/sh_mmcif.h
+ *
+ * platform data for eMMC driver
+ *
+ * Copyright (C) 2010 Renesas Solutions Corp.
+ *
+ * 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.
+ *
+ */
+
+#ifndef LINUX_MMC_SH_MMCIF_H
+#define LINUX_MMC_SH_MMCIF_H
+
+#include <linux/io.h>
+#include <linux/platform_device.h>
+
+/*
+ * MMCIF : CE_CLK_CTRL [19:16]
+ * 1000 : Peripheral clock / 512
+ * 0111 : Peripheral clock / 256
+ * 0110 : Peripheral clock / 128
+ * 0101 : Peripheral clock / 64
+ * 0100 : Peripheral clock / 32
+ * 0011 : Peripheral clock / 16
+ * 0010 : Peripheral clock / 8
+ * 0001 : Peripheral clock / 4
+ * 0000 : Peripheral clock / 2
+ * 1111 : Peripheral clock (sup_pclk set '1')
+ */
+
+struct sh_mmcif_plat_data {
+	int (*get_cd)(struct platform_device *pdef);
+	unsigned int		slave_id_tx;	/* embedded slave_id_[tr]x */
+	unsigned int		slave_id_rx;
+	bool			use_cd_gpio : 1;
+	bool			ccs_unsupported : 1;
+	bool			clk_ctrl2_present : 1;
+	unsigned int		cd_gpio;
+	u8			sup_pclk;	/* 1 :SH7757, 0: SH7724/SH7372 */
+	unsigned long		caps;
+	u32			ocr;
+};
+
+#define MMCIF_CE_CMD_SET	0x00000000
+#define MMCIF_CE_ARG		0x00000008
+#define MMCIF_CE_ARG_CMD12	0x0000000C
+#define MMCIF_CE_CMD_CTRL	0x00000010
+#define MMCIF_CE_BLOCK_SET	0x00000014
+#define MMCIF_CE_CLK_CTRL	0x00000018
+#define MMCIF_CE_BUF_ACC	0x0000001C
+#define MMCIF_CE_RESP3		0x00000020
+#define MMCIF_CE_RESP2		0x00000024
+#define MMCIF_CE_RESP1		0x00000028
+#define MMCIF_CE_RESP0		0x0000002C
+#define MMCIF_CE_RESP_CMD12	0x00000030
+#define MMCIF_CE_DATA		0x00000034
+#define MMCIF_CE_INT		0x00000040
+#define MMCIF_CE_INT_MASK	0x00000044
+#define MMCIF_CE_HOST_STS1	0x00000048
+#define MMCIF_CE_HOST_STS2	0x0000004C
+#define MMCIF_CE_CLK_CTRL2	0x00000070
+#define MMCIF_CE_VERSION	0x0000007C
+
+/* CE_BUF_ACC */
+#define BUF_ACC_DMAWEN		(1 << 25)
+#define BUF_ACC_DMAREN		(1 << 24)
+#define BUF_ACC_BUSW_32		(0 << 17)
+#define BUF_ACC_BUSW_16		(1 << 17)
+#define BUF_ACC_ATYP		(1 << 16)
+
+/* CE_CLK_CTRL */
+#define CLK_ENABLE		(1 << 24) /* 1: output mmc clock */
+#define CLK_CLEAR		(0xf << 16)
+#define CLK_SUP_PCLK		(0xf << 16)
+#define CLKDIV_4		(1 << 16) /* mmc clock frequency.
+					   * n: bus clock/(2^(n+1)) */
+#define CLKDIV_256		(7 << 16) /* mmc clock frequency. (see above) */
+#define SRSPTO_256		(2 << 12) /* resp timeout */
+#define SRBSYTO_29		(0xf << 8) /* resp busy timeout */
+#define SRWDTO_29		(0xf << 4) /* read/write timeout */
+#define SCCSTO_29		(0xf << 0) /* ccs timeout */
+
+/* CE_VERSION */
+#define SOFT_RST_ON		(1 << 31)
+#define SOFT_RST_OFF		0
+
+static inline u32 sh_mmcif_readl(void __iomem *addr, int reg)
+{
+	return __raw_readl(addr + reg);
+}
+
+static inline void sh_mmcif_writel(void __iomem *addr, int reg, u32 val)
+{
+	__raw_writel(val, addr + reg);
+}
+
+#define SH_MMCIF_BBS 512 /* boot block size */
+
+static inline void sh_mmcif_boot_cmd_send(void __iomem *base,
+					  unsigned long cmd, unsigned long arg)
+{
+	sh_mmcif_writel(base, MMCIF_CE_INT, 0);
+	sh_mmcif_writel(base, MMCIF_CE_ARG, arg);
+	sh_mmcif_writel(base, MMCIF_CE_CMD_SET, cmd);
+}
+
+static inline int sh_mmcif_boot_cmd_poll(void __iomem *base, unsigned long mask)
+{
+	unsigned long tmp;
+	int cnt;
+
+	for (cnt = 0; cnt < 1000000; cnt++) {
+		tmp = sh_mmcif_readl(base, MMCIF_CE_INT);
+		if (tmp & mask) {
+			sh_mmcif_writel(base, MMCIF_CE_INT, tmp & ~mask);
+			return 0;
+		}
+	}
+
+	return -1;
+}
+
+static inline int sh_mmcif_boot_cmd(void __iomem *base,
+				    unsigned long cmd, unsigned long arg)
+{
+	sh_mmcif_boot_cmd_send(base, cmd, arg);
+	return sh_mmcif_boot_cmd_poll(base, 0x00010000);
+}
+
+static inline int sh_mmcif_boot_do_read_single(void __iomem *base,
+					       unsigned int block_nr,
+					       unsigned long *buf)
+{
+	int k;
+
+	/* CMD13 - Status */
+	sh_mmcif_boot_cmd(base, 0x0d400000, 0x00010000);
+
+	if (sh_mmcif_readl(base, MMCIF_CE_RESP0) != 0x0900)
+		return -1;
+
+	/* CMD17 - Read */
+	sh_mmcif_boot_cmd(base, 0x11480000, block_nr * SH_MMCIF_BBS);
+	if (sh_mmcif_boot_cmd_poll(base, 0x00100000) < 0)
+		return -1;
+
+	for (k = 0; k < (SH_MMCIF_BBS / 4); k++)
+		buf[k] = sh_mmcif_readl(base, MMCIF_CE_DATA);
+
+	return 0;
+}
+
+static inline int sh_mmcif_boot_do_read(void __iomem *base,
+					unsigned long first_block,
+					unsigned long nr_blocks,
+					void *buf)
+{
+	unsigned long k;
+	int ret = 0;
+
+	/* In data transfer mode: Set clock to Bus clock/4 (about 20Mhz) */
+	sh_mmcif_writel(base, MMCIF_CE_CLK_CTRL,
+			CLK_ENABLE | CLKDIV_4 | SRSPTO_256 |
+			SRBSYTO_29 | SRWDTO_29 | SCCSTO_29);
+
+	/* CMD9 - Get CSD */
+	sh_mmcif_boot_cmd(base, 0x09806000, 0x00010000);
+
+	/* CMD7 - Select the card */
+	sh_mmcif_boot_cmd(base, 0x07400000, 0x00010000);
+
+	/* CMD16 - Set the block size */
+	sh_mmcif_boot_cmd(base, 0x10400000, SH_MMCIF_BBS);
+
+	for (k = 0; !ret && k < nr_blocks; k++)
+		ret = sh_mmcif_boot_do_read_single(base, first_block + k,
+						   buf + (k * SH_MMCIF_BBS));
+
+	return ret;
+}
+
+static inline void sh_mmcif_boot_init(void __iomem *base)
+{
+	/* reset */
+	sh_mmcif_writel(base, MMCIF_CE_VERSION, SOFT_RST_ON);
+	sh_mmcif_writel(base, MMCIF_CE_VERSION, SOFT_RST_OFF);
+
+	/* byte swap */
+	sh_mmcif_writel(base, MMCIF_CE_BUF_ACC, BUF_ACC_ATYP);
+
+	/* Set block size in MMCIF hardware */
+	sh_mmcif_writel(base, MMCIF_CE_BLOCK_SET, SH_MMCIF_BBS);
+
+	/* Enable the clock, set it to Bus clock/256 (about 325Khz). */
+	sh_mmcif_writel(base, MMCIF_CE_CLK_CTRL,
+			CLK_ENABLE | CLKDIV_256 | SRSPTO_256 |
+			SRBSYTO_29 | SRWDTO_29 | SCCSTO_29);
+
+	/* CMD0 */
+	sh_mmcif_boot_cmd(base, 0x00000040, 0);
+
+	/* CMD1 - Get OCR */
+	do {
+		sh_mmcif_boot_cmd(base, 0x01405040, 0x40300000); /* CMD1 */
+	} while ((sh_mmcif_readl(base, MMCIF_CE_RESP0) & 0x80000000)
+		 != 0x80000000);
+
+	/* CMD2 - Get CID */
+	sh_mmcif_boot_cmd(base, 0x02806040, 0);
+
+	/* CMD3 - Set card relative address */
+	sh_mmcif_boot_cmd(base, 0x03400040, 0x00010000);
+}
+
+#endif /* LINUX_MMC_SH_MMCIF_H */