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fdc50a94 YG |
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 | ||
100e9186 RD |
14 | #ifndef LINUX_MMC_SH_MMCIF_H |
15 | #define LINUX_MMC_SH_MMCIF_H | |
fdc50a94 | 16 | |
487d9fc5 | 17 | #include <linux/io.h> |
a782d688 | 18 | #include <linux/platform_device.h> |
487d9fc5 | 19 | |
fdc50a94 YG |
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 { | |
777271d0 | 35 | int (*get_cd)(struct platform_device *pdef); |
916001fe | 36 | unsigned int slave_id_tx; /* embedded slave_id_[tr]x */ |
714c4a6e | 37 | unsigned int slave_id_rx; |
e480606a | 38 | bool use_cd_gpio : 1; |
967bcb77 | 39 | bool ccs_unsupported : 1; |
6d6fd367 | 40 | bool clk_ctrl2_present : 1; |
e480606a | 41 | unsigned int cd_gpio; |
a782d688 GL |
42 | u8 sup_pclk; /* 1 :SH7757, 0: SH7724/SH7372 */ |
43 | unsigned long caps; | |
44 | u32 ocr; | |
fdc50a94 YG |
45 | }; |
46 | ||
487d9fc5 MD |
47 | #define MMCIF_CE_CMD_SET 0x00000000 |
48 | #define MMCIF_CE_ARG 0x00000008 | |
49 | #define MMCIF_CE_ARG_CMD12 0x0000000C | |
50 | #define MMCIF_CE_CMD_CTRL 0x00000010 | |
51 | #define MMCIF_CE_BLOCK_SET 0x00000014 | |
52 | #define MMCIF_CE_CLK_CTRL 0x00000018 | |
53 | #define MMCIF_CE_BUF_ACC 0x0000001C | |
54 | #define MMCIF_CE_RESP3 0x00000020 | |
55 | #define MMCIF_CE_RESP2 0x00000024 | |
56 | #define MMCIF_CE_RESP1 0x00000028 | |
57 | #define MMCIF_CE_RESP0 0x0000002C | |
58 | #define MMCIF_CE_RESP_CMD12 0x00000030 | |
59 | #define MMCIF_CE_DATA 0x00000034 | |
60 | #define MMCIF_CE_INT 0x00000040 | |
61 | #define MMCIF_CE_INT_MASK 0x00000044 | |
62 | #define MMCIF_CE_HOST_STS1 0x00000048 | |
63 | #define MMCIF_CE_HOST_STS2 0x0000004C | |
6d6fd367 | 64 | #define MMCIF_CE_CLK_CTRL2 0x00000070 |
487d9fc5 MD |
65 | #define MMCIF_CE_VERSION 0x0000007C |
66 | ||
da1d39e3 SH |
67 | /* CE_BUF_ACC */ |
68 | #define BUF_ACC_DMAWEN (1 << 25) | |
69 | #define BUF_ACC_DMAREN (1 << 24) | |
70 | #define BUF_ACC_BUSW_32 (0 << 17) | |
71 | #define BUF_ACC_BUSW_16 (1 << 17) | |
72 | #define BUF_ACC_ATYP (1 << 16) | |
73 | ||
74 | /* CE_CLK_CTRL */ | |
75 | #define CLK_ENABLE (1 << 24) /* 1: output mmc clock */ | |
135111cc GL |
76 | #define CLK_CLEAR (0xf << 16) |
77 | #define CLK_SUP_PCLK (0xf << 16) | |
78 | #define CLKDIV_4 (1 << 16) /* mmc clock frequency. | |
79 | * n: bus clock/(2^(n+1)) */ | |
80 | #define CLKDIV_256 (7 << 16) /* mmc clock frequency. (see above) */ | |
81 | #define SRSPTO_256 (2 << 12) /* resp timeout */ | |
82 | #define SRBSYTO_29 (0xf << 8) /* resp busy timeout */ | |
83 | #define SRWDTO_29 (0xf << 4) /* read/write timeout */ | |
84 | #define SCCSTO_29 (0xf << 0) /* ccs timeout */ | |
da1d39e3 SH |
85 | |
86 | /* CE_VERSION */ | |
87 | #define SOFT_RST_ON (1 << 31) | |
1ae0affe | 88 | #define SOFT_RST_OFF 0 |
da1d39e3 | 89 | |
2f6ba579 | 90 | static inline u32 sh_mmcif_readl(void __iomem *addr, int reg) |
487d9fc5 | 91 | { |
bba95878 | 92 | return __raw_readl(addr + reg); |
487d9fc5 MD |
93 | } |
94 | ||
2f6ba579 | 95 | static inline void sh_mmcif_writel(void __iomem *addr, int reg, u32 val) |
487d9fc5 | 96 | { |
bba95878 | 97 | __raw_writel(val, addr + reg); |
487d9fc5 MD |
98 | } |
99 | ||
8a768952 MD |
100 | #define SH_MMCIF_BBS 512 /* boot block size */ |
101 | ||
2f6ba579 | 102 | static inline void sh_mmcif_boot_cmd_send(void __iomem *base, |
8a768952 MD |
103 | unsigned long cmd, unsigned long arg) |
104 | { | |
105 | sh_mmcif_writel(base, MMCIF_CE_INT, 0); | |
106 | sh_mmcif_writel(base, MMCIF_CE_ARG, arg); | |
107 | sh_mmcif_writel(base, MMCIF_CE_CMD_SET, cmd); | |
108 | } | |
109 | ||
2f6ba579 | 110 | static inline int sh_mmcif_boot_cmd_poll(void __iomem *base, unsigned long mask) |
8a768952 MD |
111 | { |
112 | unsigned long tmp; | |
113 | int cnt; | |
114 | ||
115 | for (cnt = 0; cnt < 1000000; cnt++) { | |
116 | tmp = sh_mmcif_readl(base, MMCIF_CE_INT); | |
117 | if (tmp & mask) { | |
118 | sh_mmcif_writel(base, MMCIF_CE_INT, tmp & ~mask); | |
119 | return 0; | |
120 | } | |
121 | } | |
122 | ||
123 | return -1; | |
124 | } | |
125 | ||
2f6ba579 | 126 | static inline int sh_mmcif_boot_cmd(void __iomem *base, |
8a768952 MD |
127 | unsigned long cmd, unsigned long arg) |
128 | { | |
129 | sh_mmcif_boot_cmd_send(base, cmd, arg); | |
130 | return sh_mmcif_boot_cmd_poll(base, 0x00010000); | |
131 | } | |
132 | ||
2f6ba579 | 133 | static inline int sh_mmcif_boot_do_read_single(void __iomem *base, |
8a768952 MD |
134 | unsigned int block_nr, |
135 | unsigned long *buf) | |
136 | { | |
137 | int k; | |
138 | ||
139 | /* CMD13 - Status */ | |
140 | sh_mmcif_boot_cmd(base, 0x0d400000, 0x00010000); | |
141 | ||
142 | if (sh_mmcif_readl(base, MMCIF_CE_RESP0) != 0x0900) | |
143 | return -1; | |
144 | ||
145 | /* CMD17 - Read */ | |
146 | sh_mmcif_boot_cmd(base, 0x11480000, block_nr * SH_MMCIF_BBS); | |
147 | if (sh_mmcif_boot_cmd_poll(base, 0x00100000) < 0) | |
148 | return -1; | |
149 | ||
150 | for (k = 0; k < (SH_MMCIF_BBS / 4); k++) | |
151 | buf[k] = sh_mmcif_readl(base, MMCIF_CE_DATA); | |
152 | ||
153 | return 0; | |
154 | } | |
155 | ||
2f6ba579 | 156 | static inline int sh_mmcif_boot_do_read(void __iomem *base, |
8a768952 MD |
157 | unsigned long first_block, |
158 | unsigned long nr_blocks, | |
159 | void *buf) | |
160 | { | |
161 | unsigned long k; | |
162 | int ret = 0; | |
163 | ||
54b38463 SH |
164 | /* In data transfer mode: Set clock to Bus clock/4 (about 20Mhz) */ |
165 | sh_mmcif_writel(base, MMCIF_CE_CLK_CTRL, | |
166 | CLK_ENABLE | CLKDIV_4 | SRSPTO_256 | | |
167 | SRBSYTO_29 | SRWDTO_29 | SCCSTO_29); | |
168 | ||
169 | /* CMD9 - Get CSD */ | |
170 | sh_mmcif_boot_cmd(base, 0x09806000, 0x00010000); | |
171 | ||
172 | /* CMD7 - Select the card */ | |
173 | sh_mmcif_boot_cmd(base, 0x07400000, 0x00010000); | |
174 | ||
8a768952 MD |
175 | /* CMD16 - Set the block size */ |
176 | sh_mmcif_boot_cmd(base, 0x10400000, SH_MMCIF_BBS); | |
177 | ||
178 | for (k = 0; !ret && k < nr_blocks; k++) | |
179 | ret = sh_mmcif_boot_do_read_single(base, first_block + k, | |
180 | buf + (k * SH_MMCIF_BBS)); | |
181 | ||
182 | return ret; | |
183 | } | |
184 | ||
2f6ba579 | 185 | static inline void sh_mmcif_boot_init(void __iomem *base) |
8a768952 | 186 | { |
8a768952 | 187 | /* reset */ |
1ae0affe SH |
188 | sh_mmcif_writel(base, MMCIF_CE_VERSION, SOFT_RST_ON); |
189 | sh_mmcif_writel(base, MMCIF_CE_VERSION, SOFT_RST_OFF); | |
8a768952 MD |
190 | |
191 | /* byte swap */ | |
da1d39e3 | 192 | sh_mmcif_writel(base, MMCIF_CE_BUF_ACC, BUF_ACC_ATYP); |
8a768952 MD |
193 | |
194 | /* Set block size in MMCIF hardware */ | |
195 | sh_mmcif_writel(base, MMCIF_CE_BLOCK_SET, SH_MMCIF_BBS); | |
196 | ||
22efa0fe | 197 | /* Enable the clock, set it to Bus clock/256 (about 325Khz). */ |
da1d39e3 | 198 | sh_mmcif_writel(base, MMCIF_CE_CLK_CTRL, |
22efa0fe SH |
199 | CLK_ENABLE | CLKDIV_256 | SRSPTO_256 | |
200 | SRBSYTO_29 | SRWDTO_29 | SCCSTO_29); | |
8a768952 MD |
201 | |
202 | /* CMD0 */ | |
203 | sh_mmcif_boot_cmd(base, 0x00000040, 0); | |
204 | ||
205 | /* CMD1 - Get OCR */ | |
206 | do { | |
207 | sh_mmcif_boot_cmd(base, 0x01405040, 0x40300000); /* CMD1 */ | |
208 | } while ((sh_mmcif_readl(base, MMCIF_CE_RESP0) & 0x80000000) | |
209 | != 0x80000000); | |
210 | ||
211 | /* CMD2 - Get CID */ | |
212 | sh_mmcif_boot_cmd(base, 0x02806040, 0); | |
213 | ||
214 | /* CMD3 - Set card relative address */ | |
215 | sh_mmcif_boot_cmd(base, 0x03400040, 0x00010000); | |
216 | } | |
217 | ||
100e9186 | 218 | #endif /* LINUX_MMC_SH_MMCIF_H */ |