2 * linux/drivers/mmc/host/sdhci.h - Secure Digital Host Controller Interface driver
4 * Copyright (C) 2005-2008 Pierre Ossman, All Rights Reserved.
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or (at
9 * your option) any later version.
14 #include <linux/scatterlist.h>
15 #include <linux/compiler.h>
16 #include <linux/types.h>
20 * Controller registers
23 #define SDHCI_DMA_ADDRESS 0x00
25 #define SDHCI_BLOCK_SIZE 0x04
26 #define SDHCI_MAKE_BLKSZ(dma, blksz) (((dma & 0x7) << 12) | (blksz & 0xFFF))
28 #define SDHCI_BLOCK_COUNT 0x06
30 #define SDHCI_ARGUMENT 0x08
32 #define SDHCI_TRANSFER_MODE 0x0C
33 #define SDHCI_TRNS_DMA 0x01
34 #define SDHCI_TRNS_BLK_CNT_EN 0x02
35 #define SDHCI_TRNS_ACMD12 0x04
36 #define SDHCI_TRNS_READ 0x10
37 #define SDHCI_TRNS_MULTI 0x20
39 #define SDHCI_COMMAND 0x0E
40 #define SDHCI_CMD_RESP_MASK 0x03
41 #define SDHCI_CMD_CRC 0x08
42 #define SDHCI_CMD_INDEX 0x10
43 #define SDHCI_CMD_DATA 0x20
45 #define SDHCI_CMD_RESP_NONE 0x00
46 #define SDHCI_CMD_RESP_LONG 0x01
47 #define SDHCI_CMD_RESP_SHORT 0x02
48 #define SDHCI_CMD_RESP_SHORT_BUSY 0x03
50 #define SDHCI_MAKE_CMD(c, f) (((c & 0xff) << 8) | (f & 0xff))
52 #define SDHCI_RESPONSE 0x10
54 #define SDHCI_BUFFER 0x20
56 #define SDHCI_PRESENT_STATE 0x24
57 #define SDHCI_CMD_INHIBIT 0x00000001
58 #define SDHCI_DATA_INHIBIT 0x00000002
59 #define SDHCI_DOING_WRITE 0x00000100
60 #define SDHCI_DOING_READ 0x00000200
61 #define SDHCI_SPACE_AVAILABLE 0x00000400
62 #define SDHCI_DATA_AVAILABLE 0x00000800
63 #define SDHCI_CARD_PRESENT 0x00010000
64 #define SDHCI_WRITE_PROTECT 0x00080000
66 #define SDHCI_HOST_CONTROL 0x28
67 #define SDHCI_CTRL_LED 0x01
68 #define SDHCI_CTRL_4BITBUS 0x02
69 #define SDHCI_CTRL_HISPD 0x04
70 #define SDHCI_CTRL_DMA_MASK 0x18
71 #define SDHCI_CTRL_SDMA 0x00
72 #define SDHCI_CTRL_ADMA1 0x08
73 #define SDHCI_CTRL_ADMA32 0x10
74 #define SDHCI_CTRL_ADMA64 0x18
75 #define SDHCI_CTRL_8BITBUS 0x20
77 #define SDHCI_POWER_CONTROL 0x29
78 #define SDHCI_POWER_ON 0x01
79 #define SDHCI_POWER_180 0x0A
80 #define SDHCI_POWER_300 0x0C
81 #define SDHCI_POWER_330 0x0E
83 #define SDHCI_BLOCK_GAP_CONTROL 0x2A
85 #define SDHCI_WAKE_UP_CONTROL 0x2B
87 #define SDHCI_CLOCK_CONTROL 0x2C
88 #define SDHCI_DIVIDER_SHIFT 8
89 #define SDHCI_CLOCK_CARD_EN 0x0004
90 #define SDHCI_CLOCK_INT_STABLE 0x0002
91 #define SDHCI_CLOCK_INT_EN 0x0001
93 #define SDHCI_TIMEOUT_CONTROL 0x2E
95 #define SDHCI_SOFTWARE_RESET 0x2F
96 #define SDHCI_RESET_ALL 0x01
97 #define SDHCI_RESET_CMD 0x02
98 #define SDHCI_RESET_DATA 0x04
100 #define SDHCI_INT_STATUS 0x30
101 #define SDHCI_INT_ENABLE 0x34
102 #define SDHCI_SIGNAL_ENABLE 0x38
103 #define SDHCI_INT_RESPONSE 0x00000001
104 #define SDHCI_INT_DATA_END 0x00000002
105 #define SDHCI_INT_DMA_END 0x00000008
106 #define SDHCI_INT_SPACE_AVAIL 0x00000010
107 #define SDHCI_INT_DATA_AVAIL 0x00000020
108 #define SDHCI_INT_CARD_INSERT 0x00000040
109 #define SDHCI_INT_CARD_REMOVE 0x00000080
110 #define SDHCI_INT_CARD_INT 0x00000100
111 #define SDHCI_INT_ERROR 0x00008000
112 #define SDHCI_INT_TIMEOUT 0x00010000
113 #define SDHCI_INT_CRC 0x00020000
114 #define SDHCI_INT_END_BIT 0x00040000
115 #define SDHCI_INT_INDEX 0x00080000
116 #define SDHCI_INT_DATA_TIMEOUT 0x00100000
117 #define SDHCI_INT_DATA_CRC 0x00200000
118 #define SDHCI_INT_DATA_END_BIT 0x00400000
119 #define SDHCI_INT_BUS_POWER 0x00800000
120 #define SDHCI_INT_ACMD12ERR 0x01000000
121 #define SDHCI_INT_ADMA_ERROR 0x02000000
123 #define SDHCI_INT_NORMAL_MASK 0x00007FFF
124 #define SDHCI_INT_ERROR_MASK 0xFFFF8000
126 #define SDHCI_INT_CMD_MASK (SDHCI_INT_RESPONSE | SDHCI_INT_TIMEOUT | \
127 SDHCI_INT_CRC | SDHCI_INT_END_BIT | SDHCI_INT_INDEX)
128 #define SDHCI_INT_DATA_MASK (SDHCI_INT_DATA_END | SDHCI_INT_DMA_END | \
129 SDHCI_INT_DATA_AVAIL | SDHCI_INT_SPACE_AVAIL | \
130 SDHCI_INT_DATA_TIMEOUT | SDHCI_INT_DATA_CRC | \
131 SDHCI_INT_DATA_END_BIT | SDHCI_INT_ADMA_ERROR)
132 #define SDHCI_INT_ALL_MASK ((unsigned int)-1)
134 #define SDHCI_ACMD12_ERR 0x3C
138 #define SDHCI_CAPABILITIES 0x40
139 #define SDHCI_TIMEOUT_CLK_MASK 0x0000003F
140 #define SDHCI_TIMEOUT_CLK_SHIFT 0
141 #define SDHCI_TIMEOUT_CLK_UNIT 0x00000080
142 #define SDHCI_CLOCK_BASE_MASK 0x00003F00
143 #define SDHCI_CLOCK_BASE_SHIFT 8
144 #define SDHCI_MAX_BLOCK_MASK 0x00030000
145 #define SDHCI_MAX_BLOCK_SHIFT 16
146 #define SDHCI_CAN_DO_ADMA2 0x00080000
147 #define SDHCI_CAN_DO_ADMA1 0x00100000
148 #define SDHCI_CAN_DO_HISPD 0x00200000
149 #define SDHCI_CAN_DO_SDMA 0x00400000
150 #define SDHCI_CAN_VDD_330 0x01000000
151 #define SDHCI_CAN_VDD_300 0x02000000
152 #define SDHCI_CAN_VDD_180 0x04000000
153 #define SDHCI_CAN_64BIT 0x10000000
155 /* 44-47 reserved for more caps */
157 #define SDHCI_MAX_CURRENT 0x48
159 /* 4C-4F reserved for more max current */
161 #define SDHCI_SET_ACMD12_ERROR 0x50
162 #define SDHCI_SET_INT_ERROR 0x52
164 #define SDHCI_ADMA_ERROR 0x54
168 #define SDHCI_ADMA_ADDRESS 0x58
172 #define SDHCI_SLOT_INT_STATUS 0xFC
174 #define SDHCI_HOST_VERSION 0xFE
175 #define SDHCI_VENDOR_VER_MASK 0xFF00
176 #define SDHCI_VENDOR_VER_SHIFT 8
177 #define SDHCI_SPEC_VER_MASK 0x00FF
178 #define SDHCI_SPEC_VER_SHIFT 0
179 #define SDHCI_SPEC_100 0
180 #define SDHCI_SPEC_200 1
185 /* Data set by hardware interface driver */
186 const char *hw_name; /* Hardware bus name */
188 unsigned int quirks; /* Deviations from spec. */
190 /* Controller doesn't honor resets unless we touch the clock register */
191 #define SDHCI_QUIRK_CLOCK_BEFORE_RESET (1<<0)
192 /* Controller has bad caps bits, but really supports DMA */
193 #define SDHCI_QUIRK_FORCE_DMA (1<<1)
194 /* Controller doesn't like to be reset when there is no card inserted. */
195 #define SDHCI_QUIRK_NO_CARD_NO_RESET (1<<2)
196 /* Controller doesn't like clearing the power reg before a change */
197 #define SDHCI_QUIRK_SINGLE_POWER_WRITE (1<<3)
198 /* Controller has flaky internal state so reset it on each ios change */
199 #define SDHCI_QUIRK_RESET_CMD_DATA_ON_IOS (1<<4)
200 /* Controller has an unusable DMA engine */
201 #define SDHCI_QUIRK_BROKEN_DMA (1<<5)
202 /* Controller has an unusable ADMA engine */
203 #define SDHCI_QUIRK_BROKEN_ADMA (1<<6)
204 /* Controller can only DMA from 32-bit aligned addresses */
205 #define SDHCI_QUIRK_32BIT_DMA_ADDR (1<<7)
206 /* Controller can only DMA chunk sizes that are a multiple of 32 bits */
207 #define SDHCI_QUIRK_32BIT_DMA_SIZE (1<<8)
208 /* Controller can only ADMA chunks that are a multiple of 32 bits */
209 #define SDHCI_QUIRK_32BIT_ADMA_SIZE (1<<9)
210 /* Controller needs to be reset after each request to stay stable */
211 #define SDHCI_QUIRK_RESET_AFTER_REQUEST (1<<10)
212 /* Controller needs voltage and power writes to happen separately */
213 #define SDHCI_QUIRK_NO_SIMULT_VDD_AND_POWER (1<<11)
214 /* Controller provides an incorrect timeout value for transfers */
215 #define SDHCI_QUIRK_BROKEN_TIMEOUT_VAL (1<<12)
216 /* Controller has an issue with buffer bits for small transfers */
217 #define SDHCI_QUIRK_BROKEN_SMALL_PIO (1<<13)
218 /* Controller does not provide transfer-complete interrupt when not busy */
219 #define SDHCI_QUIRK_NO_BUSY_IRQ (1<<14)
220 /* Controller has unreliable card detection */
221 #define SDHCI_QUIRK_BROKEN_CARD_DETECTION (1<<15)
222 /* Controller reports inverted write-protect state */
223 #define SDHCI_QUIRK_INVERTED_WRITE_PROTECT (1<<16)
224 /* Controller has nonstandard clock management */
225 #define SDHCI_QUIRK_NONSTANDARD_CLOCK (1<<17)
226 /* Controller does not like fast PIO transfers */
227 #define SDHCI_QUIRK_PIO_NEEDS_DELAY (1<<18)
228 /* Controller losing signal/interrupt enable states after reset */
229 #define SDHCI_QUIRK_RESTORE_IRQS_AFTER_RESET (1<<19)
230 /* Controller has to be forced to use block size of 2048 bytes */
231 #define SDHCI_QUIRK_FORCE_BLK_SZ_2048 (1<<20)
232 /* Controller cannot do multi-block transfers */
233 #define SDHCI_QUIRK_NO_MULTIBLOCK (1<<21)
234 /* Controller can only handle 1-bit data transfers */
235 #define SDHCI_QUIRK_FORCE_1_BIT_DATA (1<<22)
236 /* Controller needs 10ms delay between applying power and clock */
237 #define SDHCI_QUIRK_DELAY_AFTER_POWER (1<<23)
238 /* Controller uses SDCLK instead of TMCLK for data timeouts */
239 #define SDHCI_QUIRK_DATA_TIMEOUT_USES_SDCLK (1<<24)
240 /* Controller reports wrong base clock capability */
241 #define SDHCI_QUIRK_CAP_CLOCK_BASE_BROKEN (1<<25)
242 /* Controller cannot support End Attribute in NOP ADMA descriptor */
243 #define SDHCI_QUIRK_NO_ENDATTR_IN_NOPDESC (1<<26)
244 /* Controller is missing device caps. Use caps provided by host */
245 #define SDHCI_QUIRK_MISSING_CAPS (1<<27)
246 /* Controller uses Auto CMD12 command to stop the transfer */
247 #define SDHCI_QUIRK_MULTIBLOCK_READ_ACMD12 (1<<28)
249 int irq; /* Device IRQ */
250 void __iomem * ioaddr; /* Mapped address */
252 const struct sdhci_ops *ops; /* Low level hw interface */
254 struct regulator *vmmc; /* Power regulator */
257 struct mmc_host *mmc; /* MMC structure */
258 u64 dma_mask; /* custom DMA mask */
260 #if defined(CONFIG_LEDS_CLASS) || defined(CONFIG_LEDS_CLASS_MODULE)
261 struct led_classdev led; /* LED control */
265 spinlock_t lock; /* Mutex */
267 int flags; /* Host attributes */
268 #define SDHCI_USE_SDMA (1<<0) /* Host is SDMA capable */
269 #define SDHCI_USE_ADMA (1<<1) /* Host is ADMA capable */
270 #define SDHCI_REQ_USE_DMA (1<<2) /* Use DMA for this req. */
271 #define SDHCI_DEVICE_DEAD (1<<3) /* Device unresponsive */
273 unsigned int version; /* SDHCI spec. version */
275 unsigned int max_clk; /* Max possible freq (MHz) */
276 unsigned int timeout_clk; /* Timeout freq (KHz) */
278 unsigned int clock; /* Current clock (MHz) */
279 u8 pwr; /* Current voltage */
281 struct mmc_request *mrq; /* Current request */
282 struct mmc_command *cmd; /* Current command */
283 struct mmc_data *data; /* Current data request */
284 unsigned int data_early:1; /* Data finished before cmd */
286 struct sg_mapping_iter sg_miter; /* SG state for PIO */
287 unsigned int blocks; /* remaining PIO blocks */
289 int sg_count; /* Mapped sg entries */
291 u8 *adma_desc; /* ADMA descriptor table */
292 u8 *align_buffer; /* Bounce buffer */
294 dma_addr_t adma_addr; /* Mapped ADMA descr. table */
295 dma_addr_t align_addr; /* Mapped bounce buffer */
297 struct tasklet_struct card_tasklet; /* Tasklet structures */
298 struct tasklet_struct finish_tasklet;
300 struct timer_list timer; /* Timer for timeouts */
302 unsigned int caps; /* Alternative capabilities */
304 unsigned long private[0] ____cacheline_aligned;
309 #ifdef CONFIG_MMC_SDHCI_IO_ACCESSORS
310 u32 (*read_l)(struct sdhci_host *host, int reg);
311 u16 (*read_w)(struct sdhci_host *host, int reg);
312 u8 (*read_b)(struct sdhci_host *host, int reg);
313 void (*write_l)(struct sdhci_host *host, u32 val, int reg);
314 void (*write_w)(struct sdhci_host *host, u16 val, int reg);
315 void (*write_b)(struct sdhci_host *host, u8 val, int reg);
318 void (*set_clock)(struct sdhci_host *host, unsigned int clock);
320 int (*enable_dma)(struct sdhci_host *host);
321 unsigned int (*get_max_clock)(struct sdhci_host *host);
322 unsigned int (*get_min_clock)(struct sdhci_host *host);
323 unsigned int (*get_timeout_clock)(struct sdhci_host *host);
326 #ifdef CONFIG_MMC_SDHCI_IO_ACCESSORS
328 static inline void sdhci_writel(struct sdhci_host *host, u32 val, int reg)
330 if (unlikely(host->ops->write_l))
331 host->ops->write_l(host, val, reg);
333 writel(val, host->ioaddr + reg);
336 static inline void sdhci_writew(struct sdhci_host *host, u16 val, int reg)
338 if (unlikely(host->ops->write_w))
339 host->ops->write_w(host, val, reg);
341 writew(val, host->ioaddr + reg);
344 static inline void sdhci_writeb(struct sdhci_host *host, u8 val, int reg)
346 if (unlikely(host->ops->write_b))
347 host->ops->write_b(host, val, reg);
349 writeb(val, host->ioaddr + reg);
352 static inline u32 sdhci_readl(struct sdhci_host *host, int reg)
354 if (unlikely(host->ops->read_l))
355 return host->ops->read_l(host, reg);
357 return readl(host->ioaddr + reg);
360 static inline u16 sdhci_readw(struct sdhci_host *host, int reg)
362 if (unlikely(host->ops->read_w))
363 return host->ops->read_w(host, reg);
365 return readw(host->ioaddr + reg);
368 static inline u8 sdhci_readb(struct sdhci_host *host, int reg)
370 if (unlikely(host->ops->read_b))
371 return host->ops->read_b(host, reg);
373 return readb(host->ioaddr + reg);
378 static inline void sdhci_writel(struct sdhci_host *host, u32 val, int reg)
380 writel(val, host->ioaddr + reg);
383 static inline void sdhci_writew(struct sdhci_host *host, u16 val, int reg)
385 writew(val, host->ioaddr + reg);
388 static inline void sdhci_writeb(struct sdhci_host *host, u8 val, int reg)
390 writeb(val, host->ioaddr + reg);
393 static inline u32 sdhci_readl(struct sdhci_host *host, int reg)
395 return readl(host->ioaddr + reg);
398 static inline u16 sdhci_readw(struct sdhci_host *host, int reg)
400 return readw(host->ioaddr + reg);
403 static inline u8 sdhci_readb(struct sdhci_host *host, int reg)
405 return readb(host->ioaddr + reg);
408 #endif /* CONFIG_MMC_SDHCI_IO_ACCESSORS */
410 extern struct sdhci_host *sdhci_alloc_host(struct device *dev,
412 extern void sdhci_free_host(struct sdhci_host *host);
414 static inline void *sdhci_priv(struct sdhci_host *host)
416 return (void *)host->private;
419 extern void sdhci_card_detect(struct sdhci_host *host);
420 extern int sdhci_add_host(struct sdhci_host *host);
421 extern void sdhci_remove_host(struct sdhci_host *host, int dead);
424 extern int sdhci_suspend_host(struct sdhci_host *host, pm_message_t state);
425 extern int sdhci_resume_host(struct sdhci_host *host);
428 #endif /* __SDHCI_H */