]>
Commit | Line | Data |
---|---|---|
b8c86fc5 PO |
1 | /* linux/drivers/mmc/host/sdhci-pci.c - SDHCI on PCI bus interface |
2 | * | |
3 | * Copyright (C) 2005-2008 Pierre Ossman, All Rights Reserved. | |
4 | * | |
5 | * This program is free software; you can redistribute it and/or modify | |
6 | * it under the terms of the GNU General Public License as published by | |
7 | * the Free Software Foundation; either version 2 of the License, or (at | |
8 | * your option) any later version. | |
9 | * | |
10 | * Thanks to the following companies for their support: | |
11 | * | |
12 | * - JMicron (hardware and technical support) | |
13 | */ | |
14 | ||
15 | #include <linux/delay.h> | |
16 | #include <linux/highmem.h> | |
17 | #include <linux/pci.h> | |
18 | #include <linux/dma-mapping.h> | |
19 | ||
20 | #include <linux/mmc/host.h> | |
21 | ||
22 | #include <asm/scatterlist.h> | |
23 | #include <asm/io.h> | |
24 | ||
25 | #include "sdhci.h" | |
26 | ||
27 | /* | |
28 | * PCI registers | |
29 | */ | |
30 | ||
31 | #define PCI_SDHCI_IFPIO 0x00 | |
32 | #define PCI_SDHCI_IFDMA 0x01 | |
33 | #define PCI_SDHCI_IFVENDOR 0x02 | |
34 | ||
35 | #define PCI_SLOT_INFO 0x40 /* 8 bits */ | |
36 | #define PCI_SLOT_INFO_SLOTS(x) ((x >> 4) & 7) | |
37 | #define PCI_SLOT_INFO_FIRST_BAR_MASK 0x07 | |
38 | ||
39 | #define MAX_SLOTS 8 | |
40 | ||
41 | static const struct pci_device_id pci_ids[] __devinitdata = { | |
42 | { | |
43 | .vendor = PCI_VENDOR_ID_RICOH, | |
44 | .device = PCI_DEVICE_ID_RICOH_R5C822, | |
45 | .subvendor = PCI_VENDOR_ID_IBM, | |
46 | .subdevice = PCI_ANY_ID, | |
47 | .driver_data = SDHCI_QUIRK_CLOCK_BEFORE_RESET | | |
48 | SDHCI_QUIRK_FORCE_DMA, | |
49 | }, | |
50 | ||
51 | { | |
52 | .vendor = PCI_VENDOR_ID_RICOH, | |
53 | .device = PCI_DEVICE_ID_RICOH_R5C822, | |
54 | .subvendor = PCI_VENDOR_ID_SAMSUNG, | |
55 | .subdevice = PCI_ANY_ID, | |
56 | .driver_data = SDHCI_QUIRK_FORCE_DMA | | |
57 | SDHCI_QUIRK_NO_CARD_NO_RESET, | |
58 | }, | |
59 | ||
60 | { | |
61 | .vendor = PCI_VENDOR_ID_RICOH, | |
62 | .device = PCI_DEVICE_ID_RICOH_R5C822, | |
63 | .subvendor = PCI_ANY_ID, | |
64 | .subdevice = PCI_ANY_ID, | |
65 | .driver_data = SDHCI_QUIRK_FORCE_DMA, | |
66 | }, | |
67 | ||
68 | { | |
69 | .vendor = PCI_VENDOR_ID_TI, | |
70 | .device = PCI_DEVICE_ID_TI_XX21_XX11_SD, | |
71 | .subvendor = PCI_ANY_ID, | |
72 | .subdevice = PCI_ANY_ID, | |
73 | .driver_data = SDHCI_QUIRK_FORCE_DMA, | |
74 | }, | |
75 | ||
76 | { | |
77 | .vendor = PCI_VENDOR_ID_ENE, | |
78 | .device = PCI_DEVICE_ID_ENE_CB712_SD, | |
79 | .subvendor = PCI_ANY_ID, | |
80 | .subdevice = PCI_ANY_ID, | |
81 | .driver_data = SDHCI_QUIRK_SINGLE_POWER_WRITE | | |
82 | SDHCI_QUIRK_BROKEN_DMA, | |
83 | }, | |
84 | ||
85 | { | |
86 | .vendor = PCI_VENDOR_ID_ENE, | |
87 | .device = PCI_DEVICE_ID_ENE_CB712_SD_2, | |
88 | .subvendor = PCI_ANY_ID, | |
89 | .subdevice = PCI_ANY_ID, | |
90 | .driver_data = SDHCI_QUIRK_SINGLE_POWER_WRITE | | |
91 | SDHCI_QUIRK_BROKEN_DMA, | |
92 | }, | |
93 | ||
94 | { | |
95 | .vendor = PCI_VENDOR_ID_ENE, | |
96 | .device = PCI_DEVICE_ID_ENE_CB714_SD, | |
97 | .subvendor = PCI_ANY_ID, | |
98 | .subdevice = PCI_ANY_ID, | |
99 | .driver_data = SDHCI_QUIRK_SINGLE_POWER_WRITE | | |
100 | SDHCI_QUIRK_RESET_CMD_DATA_ON_IOS | | |
101 | SDHCI_QUIRK_BROKEN_DMA, | |
102 | }, | |
103 | ||
104 | { | |
105 | .vendor = PCI_VENDOR_ID_ENE, | |
106 | .device = PCI_DEVICE_ID_ENE_CB714_SD_2, | |
107 | .subvendor = PCI_ANY_ID, | |
108 | .subdevice = PCI_ANY_ID, | |
109 | .driver_data = SDHCI_QUIRK_SINGLE_POWER_WRITE | | |
110 | SDHCI_QUIRK_RESET_CMD_DATA_ON_IOS | | |
111 | SDHCI_QUIRK_BROKEN_DMA, | |
112 | }, | |
113 | ||
114 | { | |
115 | .vendor = PCI_VENDOR_ID_MARVELL, | |
116 | .device = PCI_DEVICE_ID_MARVELL_CAFE_SD, | |
117 | .subvendor = PCI_ANY_ID, | |
118 | .subdevice = PCI_ANY_ID, | |
119 | .driver_data = SDHCI_QUIRK_NO_SIMULT_VDD_AND_POWER | | |
120 | SDHCI_QUIRK_INCR_TIMEOUT_CONTROL, | |
121 | }, | |
122 | ||
123 | { | |
124 | .vendor = PCI_VENDOR_ID_JMICRON, | |
125 | .device = PCI_DEVICE_ID_JMICRON_JMB38X_SD, | |
126 | .subvendor = PCI_ANY_ID, | |
127 | .subdevice = PCI_ANY_ID, | |
128 | .driver_data = SDHCI_QUIRK_32BIT_DMA_ADDR | | |
129 | SDHCI_QUIRK_32BIT_DMA_SIZE | | |
130 | SDHCI_QUIRK_RESET_AFTER_REQUEST, | |
131 | }, | |
132 | ||
133 | { /* Generic SD host controller */ | |
134 | PCI_DEVICE_CLASS((PCI_CLASS_SYSTEM_SDHCI << 8), 0xFFFF00) | |
135 | }, | |
136 | ||
137 | { /* end: all zeroes */ }, | |
138 | }; | |
139 | ||
140 | MODULE_DEVICE_TABLE(pci, pci_ids); | |
141 | ||
142 | struct sdhci_pci_chip; | |
143 | ||
144 | struct sdhci_pci_slot { | |
145 | struct sdhci_pci_chip *chip; | |
146 | struct sdhci_host *host; | |
147 | ||
148 | int pci_bar; | |
149 | }; | |
150 | ||
151 | struct sdhci_pci_chip { | |
152 | struct pci_dev *pdev; | |
153 | unsigned int quirks; | |
154 | ||
155 | int num_slots; /* Slots on controller */ | |
156 | struct sdhci_pci_slot *slots[MAX_SLOTS]; /* Pointers to host slots */ | |
157 | }; | |
158 | ||
159 | /*****************************************************************************\ | |
160 | * * | |
161 | * SDHCI core callbacks * | |
162 | * * | |
163 | \*****************************************************************************/ | |
164 | ||
165 | static int sdhci_pci_enable_dma(struct sdhci_host *host) | |
166 | { | |
167 | struct sdhci_pci_slot *slot; | |
168 | struct pci_dev *pdev; | |
169 | int ret; | |
170 | ||
171 | slot = sdhci_priv(host); | |
172 | pdev = slot->chip->pdev; | |
173 | ||
174 | if (((pdev->class & 0xFFFF00) == (PCI_CLASS_SYSTEM_SDHCI << 8)) && | |
175 | ((pdev->class & 0x0000FF) != PCI_SDHCI_IFDMA) && | |
176 | (host->flags & SDHCI_USE_DMA)) { | |
177 | dev_warn(&pdev->dev, "Will use DMA mode even though HW " | |
178 | "doesn't fully claim to support it.\n"); | |
179 | } | |
180 | ||
181 | ret = pci_set_dma_mask(pdev, DMA_32BIT_MASK); | |
182 | if (ret) | |
183 | return ret; | |
184 | ||
185 | pci_set_master(pdev); | |
186 | ||
187 | return 0; | |
188 | } | |
189 | ||
190 | static struct sdhci_ops sdhci_pci_ops = { | |
191 | .enable_dma = sdhci_pci_enable_dma, | |
192 | }; | |
193 | ||
194 | /*****************************************************************************\ | |
195 | * * | |
196 | * Suspend/resume * | |
197 | * * | |
198 | \*****************************************************************************/ | |
199 | ||
200 | #ifdef CONFIG_PM | |
201 | ||
202 | static int sdhci_pci_suspend (struct pci_dev *pdev, pm_message_t state) | |
203 | { | |
204 | struct sdhci_pci_chip *chip; | |
205 | struct sdhci_pci_slot *slot; | |
206 | int i, ret; | |
207 | ||
208 | chip = pci_get_drvdata(pdev); | |
209 | if (!chip) | |
210 | return 0; | |
211 | ||
212 | for (i = 0;i < chip->num_slots;i++) { | |
213 | slot = chip->slots[i]; | |
214 | if (!slot) | |
215 | continue; | |
216 | ||
217 | ret = sdhci_suspend_host(slot->host, state); | |
218 | ||
219 | if (ret) { | |
220 | for (i--;i >= 0;i--) | |
221 | sdhci_resume_host(chip->slots[i]->host); | |
222 | return ret; | |
223 | } | |
224 | } | |
225 | ||
226 | pci_save_state(pdev); | |
227 | pci_enable_wake(pdev, pci_choose_state(pdev, state), 0); | |
228 | pci_disable_device(pdev); | |
229 | pci_set_power_state(pdev, pci_choose_state(pdev, state)); | |
230 | ||
231 | return 0; | |
232 | } | |
233 | ||
234 | static int sdhci_pci_resume (struct pci_dev *pdev) | |
235 | { | |
236 | struct sdhci_pci_chip *chip; | |
237 | struct sdhci_pci_slot *slot; | |
238 | int i, ret; | |
239 | ||
240 | chip = pci_get_drvdata(pdev); | |
241 | if (!chip) | |
242 | return 0; | |
243 | ||
244 | pci_set_power_state(pdev, PCI_D0); | |
245 | pci_restore_state(pdev); | |
246 | ret = pci_enable_device(pdev); | |
247 | if (ret) | |
248 | return ret; | |
249 | ||
250 | for (i = 0;i < chip->num_slots;i++) { | |
251 | slot = chip->slots[i]; | |
252 | if (!slot) | |
253 | continue; | |
254 | ||
255 | ret = sdhci_resume_host(slot->host); | |
256 | if (ret) | |
257 | return ret; | |
258 | } | |
259 | ||
260 | return 0; | |
261 | } | |
262 | ||
263 | #else /* CONFIG_PM */ | |
264 | ||
265 | #define sdhci_pci_suspend NULL | |
266 | #define sdhci_pci_resume NULL | |
267 | ||
268 | #endif /* CONFIG_PM */ | |
269 | ||
270 | /*****************************************************************************\ | |
271 | * * | |
272 | * Device probing/removal * | |
273 | * * | |
274 | \*****************************************************************************/ | |
275 | ||
276 | static struct sdhci_pci_slot * __devinit sdhci_pci_probe_slot( | |
277 | struct pci_dev *pdev, struct sdhci_pci_chip *chip, int bar) | |
278 | { | |
279 | struct sdhci_pci_slot *slot; | |
280 | struct sdhci_host *host; | |
281 | ||
282 | resource_size_t addr; | |
283 | ||
284 | int ret; | |
285 | ||
286 | if (!(pci_resource_flags(pdev, bar) & IORESOURCE_MEM)) { | |
287 | dev_err(&pdev->dev, "BAR %d is not iomem. Aborting.\n", bar); | |
288 | return ERR_PTR(-ENODEV); | |
289 | } | |
290 | ||
291 | if (pci_resource_len(pdev, bar) != 0x100) { | |
292 | dev_err(&pdev->dev, "Invalid iomem size. You may " | |
293 | "experience problems.\n"); | |
294 | } | |
295 | ||
296 | if ((pdev->class & 0x0000FF) == PCI_SDHCI_IFVENDOR) { | |
297 | dev_err(&pdev->dev, "Vendor specific interface. Aborting.\n"); | |
298 | return ERR_PTR(-ENODEV); | |
299 | } | |
300 | ||
301 | if ((pdev->class & 0x0000FF) > PCI_SDHCI_IFVENDOR) { | |
302 | dev_err(&pdev->dev, "Unknown interface. Aborting.\n"); | |
303 | return ERR_PTR(-ENODEV); | |
304 | } | |
305 | ||
306 | host = sdhci_alloc_host(&pdev->dev, sizeof(struct sdhci_pci_slot)); | |
307 | if (IS_ERR(host)) { | |
308 | ret = PTR_ERR(host); | |
309 | goto unmap; | |
310 | } | |
311 | ||
312 | slot = sdhci_priv(host); | |
313 | ||
314 | slot->chip = chip; | |
315 | slot->host = host; | |
316 | slot->pci_bar = bar; | |
317 | ||
318 | host->hw_name = "PCI"; | |
319 | host->ops = &sdhci_pci_ops; | |
320 | host->quirks = chip->quirks; | |
321 | ||
322 | host->irq = pdev->irq; | |
323 | ||
324 | ret = pci_request_region(pdev, bar, mmc_hostname(host->mmc)); | |
325 | if (ret) { | |
326 | dev_err(&pdev->dev, "cannot request region\n"); | |
327 | return ERR_PTR(ret); | |
328 | } | |
329 | ||
330 | addr = pci_resource_start(pdev, bar); | |
331 | host->ioaddr = ioremap_nocache(addr, pci_resource_len(pdev, bar)); | |
332 | if (!host->ioaddr) { | |
333 | dev_err(&pdev->dev, "failed to remap registers\n"); | |
334 | goto release; | |
335 | } | |
336 | ||
337 | ret = sdhci_add_host(host); | |
338 | if (ret) | |
339 | goto unmap; | |
340 | ||
341 | return slot; | |
342 | ||
343 | unmap: | |
344 | iounmap(host->ioaddr); | |
345 | ||
346 | release: | |
347 | pci_release_region(pdev, bar); | |
348 | sdhci_free_host(host); | |
349 | ||
350 | return ERR_PTR(ret); | |
351 | } | |
352 | ||
353 | static void sdhci_pci_remove_slot(struct sdhci_pci_slot *slot) | |
354 | { | |
355 | sdhci_remove_host(slot->host); | |
356 | pci_release_region(slot->chip->pdev, slot->pci_bar); | |
357 | sdhci_free_host(slot->host); | |
358 | } | |
359 | ||
360 | static int __devinit sdhci_pci_probe(struct pci_dev *pdev, | |
361 | const struct pci_device_id *ent) | |
362 | { | |
363 | struct sdhci_pci_chip *chip; | |
364 | struct sdhci_pci_slot *slot; | |
365 | ||
366 | u8 slots, rev, first_bar; | |
367 | int ret, i; | |
368 | ||
369 | BUG_ON(pdev == NULL); | |
370 | BUG_ON(ent == NULL); | |
371 | ||
372 | pci_read_config_byte(pdev, PCI_CLASS_REVISION, &rev); | |
373 | ||
374 | dev_info(&pdev->dev, "SDHCI controller found [%04x:%04x] (rev %x)\n", | |
375 | (int)pdev->vendor, (int)pdev->device, (int)rev); | |
376 | ||
377 | ret = pci_read_config_byte(pdev, PCI_SLOT_INFO, &slots); | |
378 | if (ret) | |
379 | return ret; | |
380 | ||
381 | slots = PCI_SLOT_INFO_SLOTS(slots) + 1; | |
382 | dev_dbg(&pdev->dev, "found %d slot(s)\n", slots); | |
383 | if (slots == 0) | |
384 | return -ENODEV; | |
385 | ||
386 | BUG_ON(slots > MAX_SLOTS); | |
387 | ||
388 | ret = pci_read_config_byte(pdev, PCI_SLOT_INFO, &first_bar); | |
389 | if (ret) | |
390 | return ret; | |
391 | ||
392 | first_bar &= PCI_SLOT_INFO_FIRST_BAR_MASK; | |
393 | ||
394 | if (first_bar > 5) { | |
395 | dev_err(&pdev->dev, "Invalid first BAR. Aborting.\n"); | |
396 | return -ENODEV; | |
397 | } | |
398 | ||
399 | ret = pci_enable_device(pdev); | |
400 | if (ret) | |
401 | return ret; | |
402 | ||
403 | chip = kzalloc(sizeof(struct sdhci_pci_chip), GFP_KERNEL); | |
404 | if (!chip) { | |
405 | ret = -ENOMEM; | |
406 | goto err; | |
407 | } | |
408 | ||
409 | chip->pdev = pdev; | |
410 | chip->quirks = ent->driver_data; | |
411 | chip->num_slots = slots; | |
412 | ||
413 | pci_set_drvdata(pdev, chip); | |
414 | ||
415 | for (i = 0;i < slots;i++) { | |
416 | slot = sdhci_pci_probe_slot(pdev, chip, first_bar + i); | |
417 | if (IS_ERR(slot)) { | |
418 | for (i--;i >= 0;i--) | |
419 | sdhci_pci_remove_slot(chip->slots[i]); | |
420 | ret = PTR_ERR(slot); | |
421 | goto free; | |
422 | } | |
423 | ||
424 | chip->slots[i] = slot; | |
425 | } | |
426 | ||
427 | return 0; | |
428 | ||
429 | free: | |
430 | pci_set_drvdata(pdev, NULL); | |
431 | kfree(chip); | |
432 | ||
433 | err: | |
434 | pci_disable_device(pdev); | |
435 | return ret; | |
436 | } | |
437 | ||
438 | static void __devexit sdhci_pci_remove(struct pci_dev *pdev) | |
439 | { | |
440 | int i; | |
441 | struct sdhci_pci_chip *chip; | |
442 | ||
443 | chip = pci_get_drvdata(pdev); | |
444 | ||
445 | if (chip) { | |
446 | for (i = 0;i < chip->num_slots; i++) | |
447 | sdhci_pci_remove_slot(chip->slots[i]); | |
448 | ||
449 | pci_set_drvdata(pdev, NULL); | |
450 | kfree(chip); | |
451 | } | |
452 | ||
453 | pci_disable_device(pdev); | |
454 | } | |
455 | ||
456 | static struct pci_driver sdhci_driver = { | |
457 | .name = "sdhci-pci", | |
458 | .id_table = pci_ids, | |
459 | .probe = sdhci_pci_probe, | |
460 | .remove = __devexit_p(sdhci_pci_remove), | |
461 | .suspend = sdhci_pci_suspend, | |
462 | .resume = sdhci_pci_resume, | |
463 | }; | |
464 | ||
465 | /*****************************************************************************\ | |
466 | * * | |
467 | * Driver init/exit * | |
468 | * * | |
469 | \*****************************************************************************/ | |
470 | ||
471 | static int __init sdhci_drv_init(void) | |
472 | { | |
473 | return pci_register_driver(&sdhci_driver); | |
474 | } | |
475 | ||
476 | static void __exit sdhci_drv_exit(void) | |
477 | { | |
478 | pci_unregister_driver(&sdhci_driver); | |
479 | } | |
480 | ||
481 | module_init(sdhci_drv_init); | |
482 | module_exit(sdhci_drv_exit); | |
483 | ||
484 | MODULE_AUTHOR("Pierre Ossman <drzeus@drzeus.cx>"); | |
485 | MODULE_DESCRIPTION("Secure Digital Host Controller Interface PCI driver"); | |
486 | MODULE_LICENSE("GPL"); |