1 /*
2 * linux/include/linux/mmc/host.h
3 *
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License version 2 as
6 * published by the Free Software Foundation.
7 *
8 * Host driver specific definitions.
9 */
10 #ifndef LINUX_MMC_HOST_H
11 #define LINUX_MMC_HOST_H
12
13 #include <linux/leds.h>
14 #include <linux/mutex.h>
15 #include <linux/sched.h>
16 #include <linux/device.h>
17 #include <linux/fault-inject.h>
18 #include <linux/blkdev.h>
19
20 #include <linux/mmc/core.h>
21 #include <linux/mmc/card.h>
22 #include <linux/mmc/pm.h>
23
24 struct mmc_ios {
25 unsigned int clock; /* clock rate */
26 unsigned short vdd;
27
28 /* vdd stores the bit number of the selected voltage range from below. */
29
30 unsigned char bus_mode; /* command output mode */
31
32 #define MMC_BUSMODE_OPENDRAIN 1
33 #define MMC_BUSMODE_PUSHPULL 2
34
35 unsigned char chip_select; /* SPI chip select */
36
37 #define MMC_CS_DONTCARE 0
38 #define MMC_CS_HIGH 1
39 #define MMC_CS_LOW 2
40
41 unsigned char power_mode; /* power supply mode */
42
43 #define MMC_POWER_OFF 0
44 #define MMC_POWER_UP 1
45 #define MMC_POWER_ON 2
46 #define MMC_POWER_UNDEFINED 3
47
48 unsigned char bus_width; /* data bus width */
49
50 #define MMC_BUS_WIDTH_1 0
51 #define MMC_BUS_WIDTH_4 2
52 #define MMC_BUS_WIDTH_8 3
53
54 unsigned char timing; /* timing specification used */
55
56 #define MMC_TIMING_LEGACY 0
57 #define MMC_TIMING_MMC_HS 1
58 #define MMC_TIMING_SD_HS 2
59 #define MMC_TIMING_UHS_SDR12 3
60 #define MMC_TIMING_UHS_SDR25 4
61 #define MMC_TIMING_UHS_SDR50 5
62 #define MMC_TIMING_UHS_SDR104 6
63 #define MMC_TIMING_UHS_DDR50 7
64 #define MMC_TIMING_MMC_DDR52 8
65 #define MMC_TIMING_MMC_HS200 9
66 #define MMC_TIMING_MMC_HS400 10
67
68 unsigned char signal_voltage; /* signalling voltage (1.8V or 3.3V) */
69
70 #define MMC_SIGNAL_VOLTAGE_330 0
71 #define MMC_SIGNAL_VOLTAGE_180 1
72 #define MMC_SIGNAL_VOLTAGE_120 2
73
74 unsigned char drv_type; /* driver type (A, B, C, D) */
75
76 #define MMC_SET_DRIVER_TYPE_B 0
77 #define MMC_SET_DRIVER_TYPE_A 1
78 #define MMC_SET_DRIVER_TYPE_C 2
79 #define MMC_SET_DRIVER_TYPE_D 3
80 };
81
82 struct mmc_host_ops {
83 /*
84 * 'enable' is called when the host is claimed and 'disable' is called
85 * when the host is released. 'enable' and 'disable' are deprecated.
86 */
87 int (*enable)(struct mmc_host *host);
88 int (*disable)(struct mmc_host *host);
89 /*
90 * It is optional for the host to implement pre_req and post_req in
91 * order to support double buffering of requests (prepare one
92 * request while another request is active).
93 * pre_req() must always be followed by a post_req().
94 * To undo a call made to pre_req(), call post_req() with
95 * a nonzero err condition.
96 */
97 void (*post_req)(struct mmc_host *host, struct mmc_request *req,
98 int err);
99 void (*pre_req)(struct mmc_host *host, struct mmc_request *req,
100 bool is_first_req);
101 void (*request)(struct mmc_host *host, struct mmc_request *req);
102 /*
103 * Avoid calling these three functions too often or in a "fast path",
104 * since underlaying controller might implement them in an expensive
105 * and/or slow way.
106 *
107 * Also note that these functions might sleep, so don't call them
108 * in the atomic contexts!
109 *
110 * Return values for the get_ro callback should be:
111 * 0 for a read/write card
112 * 1 for a read-only card
113 * -ENOSYS when not supported (equal to NULL callback)
114 * or a negative errno value when something bad happened
115 *
116 * Return values for the get_cd callback should be:
117 * 0 for a absent card
118 * 1 for a present card
119 * -ENOSYS when not supported (equal to NULL callback)
120 * or a negative errno value when something bad happened
121 */
122 void (*set_ios)(struct mmc_host *host, struct mmc_ios *ios);
123 int (*get_ro)(struct mmc_host *host);
124 int (*get_cd)(struct mmc_host *host);
125
126 void (*enable_sdio_irq)(struct mmc_host *host, int enable);
127
128 /* optional callback for HC quirks */
129 void (*init_card)(struct mmc_host *host, struct mmc_card *card);
130
131 int (*start_signal_voltage_switch)(struct mmc_host *host, struct mmc_ios *ios);
132
133 /* Check if the card is pulling dat[0:3] low */
134 int (*card_busy)(struct mmc_host *host);
135
136 /* The tuning command opcode value is different for SD and eMMC cards */
137 int (*execute_tuning)(struct mmc_host *host, u32 opcode);
138
139 /* Prepare HS400 target operating frequency depending host driver */
140 int (*prepare_hs400_tuning)(struct mmc_host *host, struct mmc_ios *ios);
141 int (*select_drive_strength)(unsigned int max_dtr, int host_drv, int card_drv);
142 void (*hw_reset)(struct mmc_host *host);
143 void (*card_event)(struct mmc_host *host);
144
145 /*
146 * Optional callback to support controllers with HW issues for multiple
147 * I/O. Returns the number of supported blocks for the request.
148 */
149 int (*multi_io_quirk)(struct mmc_card *card,
150 unsigned int direction, int blk_size);
151 };
152
153 struct mmc_card;
154 struct device;
155
156 struct mmc_async_req {
157 /* active mmc request */
158 struct mmc_request *mrq;
159 /*
160 * Check error status of completed mmc request.
161 * Returns 0 if success otherwise non zero.
162 */
163 int (*err_check) (struct mmc_card *, struct mmc_async_req *);
164 };
165
166 /**
167 * struct mmc_slot - MMC slot functions
168 *
169 * @cd_irq: MMC/SD-card slot hotplug detection IRQ or -EINVAL
170 * @lock: protect the @handler_priv pointer
171 * @handler_priv: MMC/SD-card slot context
172 *
173 * Some MMC/SD host controllers implement slot-functions like card and
174 * write-protect detection natively. However, a large number of controllers
175 * leave these functions to the CPU. This struct provides a hook to attach
176 * such slot-function drivers.
177 */
178 struct mmc_slot {
179 int cd_irq;
180 struct mutex lock;
181 void *handler_priv;
182 };
183
184 /**
185 * mmc_context_info - synchronization details for mmc context
186 * @is_done_rcv wake up reason was done request
187 * @is_new_req wake up reason was new request
188 * @is_waiting_last_req mmc context waiting for single running request
189 * @wait wait queue
190 * @lock lock to protect data fields
191 */
192 struct mmc_context_info {
193 bool is_done_rcv;
194 bool is_new_req;
195 bool is_waiting_last_req;
196 wait_queue_head_t wait;
197 spinlock_t lock;
198 };
199
200 struct regulator;
201
202 struct mmc_supply {
203 struct regulator *vmmc; /* Card power supply */
204 struct regulator *vqmmc; /* Optional Vccq supply */
205 };
206
207 struct mmc_host {
208 struct device *parent;
209 struct device class_dev;
210 int index;
211 const struct mmc_host_ops *ops;
212 unsigned int f_min;
213 unsigned int f_max;
214 unsigned int f_init;
215 u32 ocr_avail;
216 u32 ocr_avail_sdio; /* SDIO-specific OCR */
217 u32 ocr_avail_sd; /* SD-specific OCR */
218 u32 ocr_avail_mmc; /* MMC-specific OCR */
219 struct notifier_block pm_notify;
220 u32 max_current_330;
221 u32 max_current_300;
222 u32 max_current_180;
223
224 #define MMC_VDD_165_195 0x00000080 /* VDD voltage 1.65 - 1.95 */
225 #define MMC_VDD_20_21 0x00000100 /* VDD voltage 2.0 ~ 2.1 */
226 #define MMC_VDD_21_22 0x00000200 /* VDD voltage 2.1 ~ 2.2 */
227 #define MMC_VDD_22_23 0x00000400 /* VDD voltage 2.2 ~ 2.3 */
228 #define MMC_VDD_23_24 0x00000800 /* VDD voltage 2.3 ~ 2.4 */
229 #define MMC_VDD_24_25 0x00001000 /* VDD voltage 2.4 ~ 2.5 */
230 #define MMC_VDD_25_26 0x00002000 /* VDD voltage 2.5 ~ 2.6 */
231 #define MMC_VDD_26_27 0x00004000 /* VDD voltage 2.6 ~ 2.7 */
232 #define MMC_VDD_27_28 0x00008000 /* VDD voltage 2.7 ~ 2.8 */
233 #define MMC_VDD_28_29 0x00010000 /* VDD voltage 2.8 ~ 2.9 */
234 #define MMC_VDD_29_30 0x00020000 /* VDD voltage 2.9 ~ 3.0 */
235 #define MMC_VDD_30_31 0x00040000 /* VDD voltage 3.0 ~ 3.1 */
236 #define MMC_VDD_31_32 0x00080000 /* VDD voltage 3.1 ~ 3.2 */
237 #define MMC_VDD_32_33 0x00100000 /* VDD voltage 3.2 ~ 3.3 */
238 #define MMC_VDD_33_34 0x00200000 /* VDD voltage 3.3 ~ 3.4 */
239 #define MMC_VDD_34_35 0x00400000 /* VDD voltage 3.4 ~ 3.5 */
240 #define MMC_VDD_35_36 0x00800000 /* VDD voltage 3.5 ~ 3.6 */
241
242 u32 caps; /* Host capabilities */
243
244 #define MMC_CAP_4_BIT_DATA (1 << 0) /* Can the host do 4 bit transfers */
245 #define MMC_CAP_MMC_HIGHSPEED (1 << 1) /* Can do MMC high-speed timing */
246 #define MMC_CAP_SD_HIGHSPEED (1 << 2) /* Can do SD high-speed timing */
247 #define MMC_CAP_SDIO_IRQ (1 << 3) /* Can signal pending SDIO IRQs */
248 #define MMC_CAP_SPI (1 << 4) /* Talks only SPI protocols */
249 #define MMC_CAP_NEEDS_POLL (1 << 5) /* Needs polling for card-detection */
250 #define MMC_CAP_8_BIT_DATA (1 << 6) /* Can the host do 8 bit transfers */
251 #define MMC_CAP_AGGRESSIVE_PM (1 << 7) /* Suspend (e)MMC/SD at idle */
252 #define MMC_CAP_NONREMOVABLE (1 << 8) /* Nonremovable e.g. eMMC */
253 #define MMC_CAP_WAIT_WHILE_BUSY (1 << 9) /* Waits while card is busy */
254 #define MMC_CAP_ERASE (1 << 10) /* Allow erase/trim commands */
255 #define MMC_CAP_1_8V_DDR (1 << 11) /* can support */
256 /* DDR mode at 1.8V */
257 #define MMC_CAP_1_2V_DDR (1 << 12) /* can support */
258 /* DDR mode at 1.2V */
259 #define MMC_CAP_POWER_OFF_CARD (1 << 13) /* Can power off after boot */
260 #define MMC_CAP_BUS_WIDTH_TEST (1 << 14) /* CMD14/CMD19 bus width ok */
261 #define MMC_CAP_UHS_SDR12 (1 << 15) /* Host supports UHS SDR12 mode */
262 #define MMC_CAP_UHS_SDR25 (1 << 16) /* Host supports UHS SDR25 mode */
263 #define MMC_CAP_UHS_SDR50 (1 << 17) /* Host supports UHS SDR50 mode */
264 #define MMC_CAP_UHS_SDR104 (1 << 18) /* Host supports UHS SDR104 mode */
265 #define MMC_CAP_UHS_DDR50 (1 << 19) /* Host supports UHS DDR50 mode */
266 #define MMC_CAP_RUNTIME_RESUME (1 << 20) /* Resume at runtime_resume. */
267 #define MMC_CAP_DRIVER_TYPE_A (1 << 23) /* Host supports Driver Type A */
268 #define MMC_CAP_DRIVER_TYPE_C (1 << 24) /* Host supports Driver Type C */
269 #define MMC_CAP_DRIVER_TYPE_D (1 << 25) /* Host supports Driver Type D */
270 #define MMC_CAP_CMD23 (1 << 30) /* CMD23 supported. */
271 #define MMC_CAP_HW_RESET (1 << 31) /* Hardware reset */
272
273 u32 caps2; /* More host capabilities */
274
275 #define MMC_CAP2_BOOTPART_NOACC (1 << 0) /* Boot partition no access */
276 #define MMC_CAP2_FULL_PWR_CYCLE (1 << 2) /* Can do full power cycle */
277 #define MMC_CAP2_HS200_1_8V_SDR (1 << 5) /* can support */
278 #define MMC_CAP2_HS200_1_2V_SDR (1 << 6) /* can support */
279 #define MMC_CAP2_HS200 (MMC_CAP2_HS200_1_8V_SDR | \
280 MMC_CAP2_HS200_1_2V_SDR)
281 #define MMC_CAP2_HC_ERASE_SZ (1 << 9) /* High-capacity erase size */
282 #define MMC_CAP2_CD_ACTIVE_HIGH (1 << 10) /* Card-detect signal active high */
283 #define MMC_CAP2_RO_ACTIVE_HIGH (1 << 11) /* Write-protect signal active high */
284 #define MMC_CAP2_PACKED_RD (1 << 12) /* Allow packed read */
285 #define MMC_CAP2_PACKED_WR (1 << 13) /* Allow packed write */
286 #define MMC_CAP2_PACKED_CMD (MMC_CAP2_PACKED_RD | \
287 MMC_CAP2_PACKED_WR)
288 #define MMC_CAP2_NO_PRESCAN_POWERUP (1 << 14) /* Don't power up before scan */
289 #define MMC_CAP2_HS400_1_8V (1 << 15) /* Can support HS400 1.8V */
290 #define MMC_CAP2_HS400_1_2V (1 << 16) /* Can support HS400 1.2V */
291 #define MMC_CAP2_HS400 (MMC_CAP2_HS400_1_8V | \
292 MMC_CAP2_HS400_1_2V)
293 #define MMC_CAP2_SDIO_IRQ_NOTHREAD (1 << 17)
294
295 mmc_pm_flag_t pm_caps; /* supported pm features */
296
297 #ifdef CONFIG_MMC_CLKGATE
298 int clk_requests; /* internal reference counter */
299 unsigned int clk_delay; /* number of MCI clk hold cycles */
300 bool clk_gated; /* clock gated */
301 struct delayed_work clk_gate_work; /* delayed clock gate */
302 unsigned int clk_old; /* old clock value cache */
303 spinlock_t clk_lock; /* lock for clk fields */
304 struct mutex clk_gate_mutex; /* mutex for clock gating */
305 struct device_attribute clkgate_delay_attr;
306 unsigned long clkgate_delay;
307 #endif
308
309 /* host specific block data */
310 unsigned int max_seg_size; /* see blk_queue_max_segment_size */
311 unsigned short max_segs; /* see blk_queue_max_segments */
312 unsigned short unused;
313 unsigned int max_req_size; /* maximum number of bytes in one req */
314 unsigned int max_blk_size; /* maximum size of one mmc block */
315 unsigned int max_blk_count; /* maximum number of blocks in one req */
316 unsigned int max_busy_timeout; /* max busy timeout in ms */
317
318 /* private data */
319 spinlock_t lock; /* lock for claim and bus ops */
320
321 struct mmc_ios ios; /* current io bus settings */
322
323 /* group bitfields together to minimize padding */
324 unsigned int use_spi_crc:1;
325 unsigned int claimed:1; /* host exclusively claimed */
326 unsigned int bus_dead:1; /* bus has been released */
327 #ifdef CONFIG_MMC_DEBUG
328 unsigned int removed:1; /* host is being removed */
329 #endif
330
331 int rescan_disable; /* disable card detection */
332 int rescan_entered; /* used with nonremovable devices */
333
334 bool trigger_card_event; /* card_event necessary */
335
336 struct mmc_card *card; /* device attached to this host */
337
338 wait_queue_head_t wq;
339 struct task_struct *claimer; /* task that has host claimed */
340 int claim_cnt; /* "claim" nesting count */
341
342 struct delayed_work detect;
343 int detect_change; /* card detect flag */
344 struct mmc_slot slot;
345
346 const struct mmc_bus_ops *bus_ops; /* current bus driver */
347 unsigned int bus_refs; /* reference counter */
348
349 unsigned int sdio_irqs;
350 struct task_struct *sdio_irq_thread;
351 bool sdio_irq_pending;
352 atomic_t sdio_irq_thread_abort;
353
354 mmc_pm_flag_t pm_flags; /* requested pm features */
355
356 struct led_trigger *led; /* activity led */
357
358 #ifdef CONFIG_REGULATOR
359 bool regulator_enabled; /* regulator state */
360 #endif
361 struct mmc_supply supply;
362
363 struct dentry *debugfs_root;
364
365 struct mmc_async_req *areq; /* active async req */
366 struct mmc_context_info context_info; /* async synchronization info */
367
368 #ifdef CONFIG_FAIL_MMC_REQUEST
369 struct fault_attr fail_mmc_request;
370 #endif
371
372 unsigned int actual_clock; /* Actual HC clock rate */
373
374 unsigned int slotno; /* used for sdio acpi binding */
375
376 int dsr_req; /* DSR value is valid */
377 u32 dsr; /* optional driver stage (DSR) value */
378
379 #ifdef CONFIG_MMC_EMBEDDED_SDIO
380 struct {
381 struct sdio_cis *cis;
382 struct sdio_cccr *cccr;
383 struct sdio_embedded_func *funcs;
384 int num_funcs;
385 } embedded_sdio_data;
386 #endif
387
388 #ifdef CONFIG_BLOCK
389 int latency_hist_enabled;
390 struct io_latency_state io_lat_read;
391 struct io_latency_state io_lat_write;
392 #endif
393
394 unsigned long private[0] ____cacheline_aligned;
395 };
396
397 struct mmc_host *mmc_alloc_host(int extra, struct device *);
398 int mmc_add_host(struct mmc_host *);
399 void mmc_remove_host(struct mmc_host *);
400 void mmc_free_host(struct mmc_host *);
401 int mmc_of_parse(struct mmc_host *host);
402
403 #ifdef CONFIG_MMC_EMBEDDED_SDIO
404 extern void mmc_set_embedded_sdio_data(struct mmc_host *host,
405 struct sdio_cis *cis,
406 struct sdio_cccr *cccr,
407 struct sdio_embedded_func *funcs,
408 int num_funcs);
409 #endif
410
mmc_priv(struct mmc_host * host)411 static inline void *mmc_priv(struct mmc_host *host)
412 {
413 return (void *)host->private;
414 }
415
416 #define mmc_host_is_spi(host) ((host)->caps & MMC_CAP_SPI)
417
418 #define mmc_dev(x) ((x)->parent)
419 #define mmc_classdev(x) (&(x)->class_dev)
420 #define mmc_hostname(x) (dev_name(&(x)->class_dev))
421
422 int mmc_power_save_host(struct mmc_host *host);
423 int mmc_power_restore_host(struct mmc_host *host);
424
425 void mmc_detect_change(struct mmc_host *, unsigned long delay);
426 void mmc_request_done(struct mmc_host *, struct mmc_request *);
427
mmc_signal_sdio_irq(struct mmc_host * host)428 static inline void mmc_signal_sdio_irq(struct mmc_host *host)
429 {
430 host->ops->enable_sdio_irq(host, 0);
431 host->sdio_irq_pending = true;
432 wake_up_process(host->sdio_irq_thread);
433 }
434
435 void sdio_run_irqs(struct mmc_host *host);
436
437 #ifdef CONFIG_REGULATOR
438 int mmc_regulator_get_ocrmask(struct regulator *supply);
439 int mmc_regulator_set_ocr(struct mmc_host *mmc,
440 struct regulator *supply,
441 unsigned short vdd_bit);
442 #else
mmc_regulator_get_ocrmask(struct regulator * supply)443 static inline int mmc_regulator_get_ocrmask(struct regulator *supply)
444 {
445 return 0;
446 }
447
mmc_regulator_set_ocr(struct mmc_host * mmc,struct regulator * supply,unsigned short vdd_bit)448 static inline int mmc_regulator_set_ocr(struct mmc_host *mmc,
449 struct regulator *supply,
450 unsigned short vdd_bit)
451 {
452 return 0;
453 }
454 #endif
455
456 int mmc_regulator_get_supply(struct mmc_host *mmc);
457
458 int mmc_pm_notify(struct notifier_block *notify_block, unsigned long, void *);
459
mmc_card_is_removable(struct mmc_host * host)460 static inline int mmc_card_is_removable(struct mmc_host *host)
461 {
462 return !(host->caps & MMC_CAP_NONREMOVABLE);
463 }
464
mmc_card_keep_power(struct mmc_host * host)465 static inline int mmc_card_keep_power(struct mmc_host *host)
466 {
467 return host->pm_flags & MMC_PM_KEEP_POWER;
468 }
469
mmc_card_wake_sdio_irq(struct mmc_host * host)470 static inline int mmc_card_wake_sdio_irq(struct mmc_host *host)
471 {
472 return host->pm_flags & MMC_PM_WAKE_SDIO_IRQ;
473 }
474
mmc_host_cmd23(struct mmc_host * host)475 static inline int mmc_host_cmd23(struct mmc_host *host)
476 {
477 return host->caps & MMC_CAP_CMD23;
478 }
479
mmc_boot_partition_access(struct mmc_host * host)480 static inline int mmc_boot_partition_access(struct mmc_host *host)
481 {
482 return !(host->caps2 & MMC_CAP2_BOOTPART_NOACC);
483 }
484
mmc_host_uhs(struct mmc_host * host)485 static inline int mmc_host_uhs(struct mmc_host *host)
486 {
487 return host->caps &
488 (MMC_CAP_UHS_SDR12 | MMC_CAP_UHS_SDR25 |
489 MMC_CAP_UHS_SDR50 | MMC_CAP_UHS_SDR104 |
490 MMC_CAP_UHS_DDR50);
491 }
492
mmc_host_packed_wr(struct mmc_host * host)493 static inline int mmc_host_packed_wr(struct mmc_host *host)
494 {
495 return host->caps2 & MMC_CAP2_PACKED_WR;
496 }
497
498 #ifdef CONFIG_MMC_CLKGATE
499 void mmc_host_clk_hold(struct mmc_host *host);
500 void mmc_host_clk_release(struct mmc_host *host);
501 unsigned int mmc_host_clk_rate(struct mmc_host *host);
502
503 #else
mmc_host_clk_hold(struct mmc_host * host)504 static inline void mmc_host_clk_hold(struct mmc_host *host)
505 {
506 }
507
mmc_host_clk_release(struct mmc_host * host)508 static inline void mmc_host_clk_release(struct mmc_host *host)
509 {
510 }
511
mmc_host_clk_rate(struct mmc_host * host)512 static inline unsigned int mmc_host_clk_rate(struct mmc_host *host)
513 {
514 return host->ios.clock;
515 }
516 #endif
517
mmc_card_hs(struct mmc_card * card)518 static inline int mmc_card_hs(struct mmc_card *card)
519 {
520 return card->host->ios.timing == MMC_TIMING_SD_HS ||
521 card->host->ios.timing == MMC_TIMING_MMC_HS;
522 }
523
mmc_card_uhs(struct mmc_card * card)524 static inline int mmc_card_uhs(struct mmc_card *card)
525 {
526 return card->host->ios.timing >= MMC_TIMING_UHS_SDR12 &&
527 card->host->ios.timing <= MMC_TIMING_UHS_DDR50;
528 }
529
mmc_card_hs200(struct mmc_card * card)530 static inline bool mmc_card_hs200(struct mmc_card *card)
531 {
532 return card->host->ios.timing == MMC_TIMING_MMC_HS200;
533 }
534
mmc_card_ddr52(struct mmc_card * card)535 static inline bool mmc_card_ddr52(struct mmc_card *card)
536 {
537 return card->host->ios.timing == MMC_TIMING_MMC_DDR52;
538 }
539
mmc_card_hs400(struct mmc_card * card)540 static inline bool mmc_card_hs400(struct mmc_card *card)
541 {
542 return card->host->ios.timing == MMC_TIMING_MMC_HS400;
543 }
544
545 #endif /* LINUX_MMC_HOST_H */
546