Yusuke Goda | fdc50a9 | 2010-05-26 14:41:59 -0700 | [diff] [blame] | 1 | /* |
| 2 | * include/linux/mmc/sh_mmcif.h |
| 3 | * |
| 4 | * platform data for eMMC driver |
| 5 | * |
| 6 | * Copyright (C) 2010 Renesas Solutions Corp. |
| 7 | * |
| 8 | * This program is free software; you can redistribute it and/or modify |
| 9 | * it under the terms of the GNU General Public License as published by |
| 10 | * the Free Software Foundation; either version 2 of the License. |
| 11 | * |
| 12 | */ |
| 13 | |
| 14 | #ifndef __SH_MMCIF_H__ |
| 15 | #define __SH_MMCIF_H__ |
| 16 | |
Magnus Damm | 487d9fc | 2010-05-18 14:42:51 +0000 | [diff] [blame] | 17 | #include <linux/platform_device.h> |
| 18 | #include <linux/io.h> |
| 19 | |
Yusuke Goda | fdc50a9 | 2010-05-26 14:41:59 -0700 | [diff] [blame] | 20 | /* |
| 21 | * MMCIF : CE_CLK_CTRL [19:16] |
| 22 | * 1000 : Peripheral clock / 512 |
| 23 | * 0111 : Peripheral clock / 256 |
| 24 | * 0110 : Peripheral clock / 128 |
| 25 | * 0101 : Peripheral clock / 64 |
| 26 | * 0100 : Peripheral clock / 32 |
| 27 | * 0011 : Peripheral clock / 16 |
| 28 | * 0010 : Peripheral clock / 8 |
| 29 | * 0001 : Peripheral clock / 4 |
| 30 | * 0000 : Peripheral clock / 2 |
| 31 | * 1111 : Peripheral clock (sup_pclk set '1') |
| 32 | */ |
| 33 | |
| 34 | struct sh_mmcif_plat_data { |
| 35 | void (*set_pwr)(struct platform_device *pdev, int state); |
| 36 | void (*down_pwr)(struct platform_device *pdev); |
Arnd Hannemann | 777271d | 2010-08-24 17:27:01 +0200 | [diff] [blame] | 37 | int (*get_cd)(struct platform_device *pdef); |
Yusuke Goda | fdc50a9 | 2010-05-26 14:41:59 -0700 | [diff] [blame] | 38 | u8 sup_pclk; /* 1 :SH7757, 0: SH7724/SH7372 */ |
| 39 | unsigned long caps; |
| 40 | u32 ocr; |
| 41 | }; |
| 42 | |
Magnus Damm | 487d9fc | 2010-05-18 14:42:51 +0000 | [diff] [blame] | 43 | #define MMCIF_CE_CMD_SET 0x00000000 |
| 44 | #define MMCIF_CE_ARG 0x00000008 |
| 45 | #define MMCIF_CE_ARG_CMD12 0x0000000C |
| 46 | #define MMCIF_CE_CMD_CTRL 0x00000010 |
| 47 | #define MMCIF_CE_BLOCK_SET 0x00000014 |
| 48 | #define MMCIF_CE_CLK_CTRL 0x00000018 |
| 49 | #define MMCIF_CE_BUF_ACC 0x0000001C |
| 50 | #define MMCIF_CE_RESP3 0x00000020 |
| 51 | #define MMCIF_CE_RESP2 0x00000024 |
| 52 | #define MMCIF_CE_RESP1 0x00000028 |
| 53 | #define MMCIF_CE_RESP0 0x0000002C |
| 54 | #define MMCIF_CE_RESP_CMD12 0x00000030 |
| 55 | #define MMCIF_CE_DATA 0x00000034 |
| 56 | #define MMCIF_CE_INT 0x00000040 |
| 57 | #define MMCIF_CE_INT_MASK 0x00000044 |
| 58 | #define MMCIF_CE_HOST_STS1 0x00000048 |
| 59 | #define MMCIF_CE_HOST_STS2 0x0000004C |
| 60 | #define MMCIF_CE_VERSION 0x0000007C |
| 61 | |
Simon Horman | da1d39e | 2010-11-09 17:47:02 +0900 | [diff] [blame] | 62 | /* CE_BUF_ACC */ |
| 63 | #define BUF_ACC_DMAWEN (1 << 25) |
| 64 | #define BUF_ACC_DMAREN (1 << 24) |
| 65 | #define BUF_ACC_BUSW_32 (0 << 17) |
| 66 | #define BUF_ACC_BUSW_16 (1 << 17) |
| 67 | #define BUF_ACC_ATYP (1 << 16) |
| 68 | |
| 69 | /* CE_CLK_CTRL */ |
| 70 | #define CLK_ENABLE (1 << 24) /* 1: output mmc clock */ |
| 71 | #define CLK_CLEAR ((1 << 19) | (1 << 18) | (1 << 17) | (1 << 16)) |
| 72 | #define CLK_SUP_PCLK ((1 << 19) | (1 << 18) | (1 << 17) | (1 << 16)) |
Simon Horman | 22efa0f | 2010-11-27 00:11:55 +0000 | [diff] [blame^] | 73 | #define CLKDIV_4 (1<<16) /* mmc clock frequency. |
| 74 | * n: bus clock/(2^(n+1)) */ |
| 75 | #define CLKDIV_256 (7<<16) /* mmc clock frequency. (see above) */ |
Simon Horman | da1d39e | 2010-11-09 17:47:02 +0900 | [diff] [blame] | 76 | #define SRSPTO_256 ((1 << 13) | (0 << 12)) /* resp timeout */ |
| 77 | #define SRBSYTO_29 ((1 << 11) | (1 << 10) | \ |
| 78 | (1 << 9) | (1 << 8)) /* resp busy timeout */ |
| 79 | #define SRWDTO_29 ((1 << 7) | (1 << 6) | \ |
| 80 | (1 << 5) | (1 << 4)) /* read/write timeout */ |
| 81 | #define SCCSTO_29 ((1 << 3) | (1 << 2) | \ |
| 82 | (1 << 1) | (1 << 0)) /* ccs timeout */ |
| 83 | |
| 84 | /* CE_VERSION */ |
| 85 | #define SOFT_RST_ON (1 << 31) |
Simon Horman | 1ae0aff | 2010-11-26 23:02:58 +0000 | [diff] [blame] | 86 | #define SOFT_RST_OFF 0 |
Simon Horman | da1d39e | 2010-11-09 17:47:02 +0900 | [diff] [blame] | 87 | |
Paul Mundt | 2f6ba57 | 2010-11-04 12:21:25 +0900 | [diff] [blame] | 88 | static inline u32 sh_mmcif_readl(void __iomem *addr, int reg) |
Magnus Damm | 487d9fc | 2010-05-18 14:42:51 +0000 | [diff] [blame] | 89 | { |
| 90 | return readl(addr + reg); |
| 91 | } |
| 92 | |
Paul Mundt | 2f6ba57 | 2010-11-04 12:21:25 +0900 | [diff] [blame] | 93 | static inline void sh_mmcif_writel(void __iomem *addr, int reg, u32 val) |
Magnus Damm | 487d9fc | 2010-05-18 14:42:51 +0000 | [diff] [blame] | 94 | { |
| 95 | writel(val, addr + reg); |
| 96 | } |
| 97 | |
Magnus Damm | 8a76895 | 2010-05-18 14:43:04 +0000 | [diff] [blame] | 98 | #define SH_MMCIF_BBS 512 /* boot block size */ |
| 99 | |
Paul Mundt | 2f6ba57 | 2010-11-04 12:21:25 +0900 | [diff] [blame] | 100 | static inline void sh_mmcif_boot_cmd_send(void __iomem *base, |
Magnus Damm | 8a76895 | 2010-05-18 14:43:04 +0000 | [diff] [blame] | 101 | unsigned long cmd, unsigned long arg) |
| 102 | { |
| 103 | sh_mmcif_writel(base, MMCIF_CE_INT, 0); |
| 104 | sh_mmcif_writel(base, MMCIF_CE_ARG, arg); |
| 105 | sh_mmcif_writel(base, MMCIF_CE_CMD_SET, cmd); |
| 106 | } |
| 107 | |
Paul Mundt | 2f6ba57 | 2010-11-04 12:21:25 +0900 | [diff] [blame] | 108 | static inline int sh_mmcif_boot_cmd_poll(void __iomem *base, unsigned long mask) |
Magnus Damm | 8a76895 | 2010-05-18 14:43:04 +0000 | [diff] [blame] | 109 | { |
| 110 | unsigned long tmp; |
| 111 | int cnt; |
| 112 | |
| 113 | for (cnt = 0; cnt < 1000000; cnt++) { |
| 114 | tmp = sh_mmcif_readl(base, MMCIF_CE_INT); |
| 115 | if (tmp & mask) { |
| 116 | sh_mmcif_writel(base, MMCIF_CE_INT, tmp & ~mask); |
| 117 | return 0; |
| 118 | } |
| 119 | } |
| 120 | |
| 121 | return -1; |
| 122 | } |
| 123 | |
Paul Mundt | 2f6ba57 | 2010-11-04 12:21:25 +0900 | [diff] [blame] | 124 | static inline int sh_mmcif_boot_cmd(void __iomem *base, |
Magnus Damm | 8a76895 | 2010-05-18 14:43:04 +0000 | [diff] [blame] | 125 | unsigned long cmd, unsigned long arg) |
| 126 | { |
| 127 | sh_mmcif_boot_cmd_send(base, cmd, arg); |
| 128 | return sh_mmcif_boot_cmd_poll(base, 0x00010000); |
| 129 | } |
| 130 | |
Paul Mundt | 2f6ba57 | 2010-11-04 12:21:25 +0900 | [diff] [blame] | 131 | static inline int sh_mmcif_boot_do_read_single(void __iomem *base, |
Magnus Damm | 8a76895 | 2010-05-18 14:43:04 +0000 | [diff] [blame] | 132 | unsigned int block_nr, |
| 133 | unsigned long *buf) |
| 134 | { |
| 135 | int k; |
| 136 | |
| 137 | /* CMD13 - Status */ |
| 138 | sh_mmcif_boot_cmd(base, 0x0d400000, 0x00010000); |
| 139 | |
| 140 | if (sh_mmcif_readl(base, MMCIF_CE_RESP0) != 0x0900) |
| 141 | return -1; |
| 142 | |
| 143 | /* CMD17 - Read */ |
| 144 | sh_mmcif_boot_cmd(base, 0x11480000, block_nr * SH_MMCIF_BBS); |
| 145 | if (sh_mmcif_boot_cmd_poll(base, 0x00100000) < 0) |
| 146 | return -1; |
| 147 | |
| 148 | for (k = 0; k < (SH_MMCIF_BBS / 4); k++) |
| 149 | buf[k] = sh_mmcif_readl(base, MMCIF_CE_DATA); |
| 150 | |
| 151 | return 0; |
| 152 | } |
| 153 | |
Paul Mundt | 2f6ba57 | 2010-11-04 12:21:25 +0900 | [diff] [blame] | 154 | static inline int sh_mmcif_boot_do_read(void __iomem *base, |
Magnus Damm | 8a76895 | 2010-05-18 14:43:04 +0000 | [diff] [blame] | 155 | unsigned long first_block, |
| 156 | unsigned long nr_blocks, |
| 157 | void *buf) |
| 158 | { |
| 159 | unsigned long k; |
| 160 | int ret = 0; |
| 161 | |
| 162 | /* CMD16 - Set the block size */ |
| 163 | sh_mmcif_boot_cmd(base, 0x10400000, SH_MMCIF_BBS); |
| 164 | |
| 165 | for (k = 0; !ret && k < nr_blocks; k++) |
| 166 | ret = sh_mmcif_boot_do_read_single(base, first_block + k, |
| 167 | buf + (k * SH_MMCIF_BBS)); |
| 168 | |
| 169 | return ret; |
| 170 | } |
| 171 | |
Paul Mundt | 2f6ba57 | 2010-11-04 12:21:25 +0900 | [diff] [blame] | 172 | static inline void sh_mmcif_boot_init(void __iomem *base) |
Magnus Damm | 8a76895 | 2010-05-18 14:43:04 +0000 | [diff] [blame] | 173 | { |
Magnus Damm | 8a76895 | 2010-05-18 14:43:04 +0000 | [diff] [blame] | 174 | /* reset */ |
Simon Horman | 1ae0aff | 2010-11-26 23:02:58 +0000 | [diff] [blame] | 175 | sh_mmcif_writel(base, MMCIF_CE_VERSION, SOFT_RST_ON); |
| 176 | sh_mmcif_writel(base, MMCIF_CE_VERSION, SOFT_RST_OFF); |
Magnus Damm | 8a76895 | 2010-05-18 14:43:04 +0000 | [diff] [blame] | 177 | |
| 178 | /* byte swap */ |
Simon Horman | da1d39e | 2010-11-09 17:47:02 +0900 | [diff] [blame] | 179 | sh_mmcif_writel(base, MMCIF_CE_BUF_ACC, BUF_ACC_ATYP); |
Magnus Damm | 8a76895 | 2010-05-18 14:43:04 +0000 | [diff] [blame] | 180 | |
| 181 | /* Set block size in MMCIF hardware */ |
| 182 | sh_mmcif_writel(base, MMCIF_CE_BLOCK_SET, SH_MMCIF_BBS); |
| 183 | |
Simon Horman | 22efa0f | 2010-11-27 00:11:55 +0000 | [diff] [blame^] | 184 | /* Enable the clock, set it to Bus clock/256 (about 325Khz). */ |
Simon Horman | da1d39e | 2010-11-09 17:47:02 +0900 | [diff] [blame] | 185 | sh_mmcif_writel(base, MMCIF_CE_CLK_CTRL, |
Simon Horman | 22efa0f | 2010-11-27 00:11:55 +0000 | [diff] [blame^] | 186 | CLK_ENABLE | CLKDIV_256 | SRSPTO_256 | |
| 187 | SRBSYTO_29 | SRWDTO_29 | SCCSTO_29); |
Magnus Damm | 8a76895 | 2010-05-18 14:43:04 +0000 | [diff] [blame] | 188 | |
| 189 | /* CMD0 */ |
| 190 | sh_mmcif_boot_cmd(base, 0x00000040, 0); |
| 191 | |
| 192 | /* CMD1 - Get OCR */ |
| 193 | do { |
| 194 | sh_mmcif_boot_cmd(base, 0x01405040, 0x40300000); /* CMD1 */ |
| 195 | } while ((sh_mmcif_readl(base, MMCIF_CE_RESP0) & 0x80000000) |
| 196 | != 0x80000000); |
| 197 | |
| 198 | /* CMD2 - Get CID */ |
| 199 | sh_mmcif_boot_cmd(base, 0x02806040, 0); |
| 200 | |
| 201 | /* CMD3 - Set card relative address */ |
| 202 | sh_mmcif_boot_cmd(base, 0x03400040, 0x00010000); |
| 203 | } |
| 204 | |
Paul Mundt | 2f6ba57 | 2010-11-04 12:21:25 +0900 | [diff] [blame] | 205 | static inline void sh_mmcif_boot_slurp(void __iomem *base, |
Magnus Damm | 8a76895 | 2010-05-18 14:43:04 +0000 | [diff] [blame] | 206 | unsigned char *buf, |
| 207 | unsigned long no_bytes) |
| 208 | { |
| 209 | unsigned long tmp; |
| 210 | |
| 211 | /* In data transfer mode: Set clock to Bus clock/4 (about 20Mhz) */ |
Simon Horman | 22efa0f | 2010-11-27 00:11:55 +0000 | [diff] [blame^] | 212 | sh_mmcif_writel(base, MMCIF_CE_CLK_CTRL, |
| 213 | CLK_ENABLE | CLKDIV_4 | SRSPTO_256 | |
| 214 | SRBSYTO_29 | SRWDTO_29 | SCCSTO_29); |
Magnus Damm | 8a76895 | 2010-05-18 14:43:04 +0000 | [diff] [blame] | 215 | |
| 216 | /* CMD9 - Get CSD */ |
| 217 | sh_mmcif_boot_cmd(base, 0x09806000, 0x00010000); |
| 218 | |
| 219 | /* CMD7 - Select the card */ |
| 220 | sh_mmcif_boot_cmd(base, 0x07400000, 0x00010000); |
| 221 | |
| 222 | tmp = no_bytes / SH_MMCIF_BBS; |
| 223 | tmp += (no_bytes % SH_MMCIF_BBS) ? 1 : 0; |
| 224 | |
| 225 | sh_mmcif_boot_do_read(base, 512, tmp, buf); |
| 226 | } |
| 227 | |
Yusuke Goda | fdc50a9 | 2010-05-26 14:41:59 -0700 | [diff] [blame] | 228 | #endif /* __SH_MMCIF_H__ */ |