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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, | |
3815a0eb | 47 | .driver_data = SDHCI_QUIRK_CLOCK_BEFORE_RESET, |
b8c86fc5 PO |
48 | }, |
49 | ||
50 | { | |
51 | .vendor = PCI_VENDOR_ID_RICOH, | |
52 | .device = PCI_DEVICE_ID_RICOH_R5C822, | |
53 | .subvendor = PCI_VENDOR_ID_SAMSUNG, | |
54 | .subdevice = PCI_ANY_ID, | |
3815a0eb | 55 | .driver_data = SDHCI_QUIRK_NO_CARD_NO_RESET, |
b8c86fc5 PO |
56 | }, |
57 | ||
58 | { | |
59 | .vendor = PCI_VENDOR_ID_ENE, | |
60 | .device = PCI_DEVICE_ID_ENE_CB712_SD, | |
61 | .subvendor = PCI_ANY_ID, | |
62 | .subdevice = PCI_ANY_ID, | |
63 | .driver_data = SDHCI_QUIRK_SINGLE_POWER_WRITE | | |
64 | SDHCI_QUIRK_BROKEN_DMA, | |
65 | }, | |
66 | ||
67 | { | |
68 | .vendor = PCI_VENDOR_ID_ENE, | |
69 | .device = PCI_DEVICE_ID_ENE_CB712_SD_2, | |
70 | .subvendor = PCI_ANY_ID, | |
71 | .subdevice = PCI_ANY_ID, | |
72 | .driver_data = SDHCI_QUIRK_SINGLE_POWER_WRITE | | |
73 | SDHCI_QUIRK_BROKEN_DMA, | |
74 | }, | |
75 | ||
76 | { | |
77 | .vendor = PCI_VENDOR_ID_ENE, | |
78 | .device = PCI_DEVICE_ID_ENE_CB714_SD, | |
79 | .subvendor = PCI_ANY_ID, | |
80 | .subdevice = PCI_ANY_ID, | |
81 | .driver_data = SDHCI_QUIRK_SINGLE_POWER_WRITE | | |
82 | SDHCI_QUIRK_RESET_CMD_DATA_ON_IOS | | |
83 | SDHCI_QUIRK_BROKEN_DMA, | |
84 | }, | |
85 | ||
86 | { | |
87 | .vendor = PCI_VENDOR_ID_ENE, | |
88 | .device = PCI_DEVICE_ID_ENE_CB714_SD_2, | |
89 | .subvendor = PCI_ANY_ID, | |
90 | .subdevice = PCI_ANY_ID, | |
91 | .driver_data = SDHCI_QUIRK_SINGLE_POWER_WRITE | | |
92 | SDHCI_QUIRK_RESET_CMD_DATA_ON_IOS | | |
93 | SDHCI_QUIRK_BROKEN_DMA, | |
94 | }, | |
95 | ||
96 | { | |
97 | .vendor = PCI_VENDOR_ID_MARVELL, | |
98 | .device = PCI_DEVICE_ID_MARVELL_CAFE_SD, | |
99 | .subvendor = PCI_ANY_ID, | |
100 | .subdevice = PCI_ANY_ID, | |
101 | .driver_data = SDHCI_QUIRK_NO_SIMULT_VDD_AND_POWER | | |
102 | SDHCI_QUIRK_INCR_TIMEOUT_CONTROL, | |
103 | }, | |
104 | ||
105 | { | |
106 | .vendor = PCI_VENDOR_ID_JMICRON, | |
107 | .device = PCI_DEVICE_ID_JMICRON_JMB38X_SD, | |
108 | .subvendor = PCI_ANY_ID, | |
109 | .subdevice = PCI_ANY_ID, | |
110 | .driver_data = SDHCI_QUIRK_32BIT_DMA_ADDR | | |
111 | SDHCI_QUIRK_32BIT_DMA_SIZE | | |
112 | SDHCI_QUIRK_RESET_AFTER_REQUEST, | |
113 | }, | |
114 | ||
115 | { /* Generic SD host controller */ | |
116 | PCI_DEVICE_CLASS((PCI_CLASS_SYSTEM_SDHCI << 8), 0xFFFF00) | |
117 | }, | |
118 | ||
119 | { /* end: all zeroes */ }, | |
120 | }; | |
121 | ||
122 | MODULE_DEVICE_TABLE(pci, pci_ids); | |
123 | ||
124 | struct sdhci_pci_chip; | |
125 | ||
126 | struct sdhci_pci_slot { | |
127 | struct sdhci_pci_chip *chip; | |
128 | struct sdhci_host *host; | |
129 | ||
130 | int pci_bar; | |
131 | }; | |
132 | ||
133 | struct sdhci_pci_chip { | |
134 | struct pci_dev *pdev; | |
135 | unsigned int quirks; | |
136 | ||
137 | int num_slots; /* Slots on controller */ | |
138 | struct sdhci_pci_slot *slots[MAX_SLOTS]; /* Pointers to host slots */ | |
139 | }; | |
140 | ||
141 | /*****************************************************************************\ | |
142 | * * | |
143 | * SDHCI core callbacks * | |
144 | * * | |
145 | \*****************************************************************************/ | |
146 | ||
147 | static int sdhci_pci_enable_dma(struct sdhci_host *host) | |
148 | { | |
149 | struct sdhci_pci_slot *slot; | |
150 | struct pci_dev *pdev; | |
151 | int ret; | |
152 | ||
153 | slot = sdhci_priv(host); | |
154 | pdev = slot->chip->pdev; | |
155 | ||
156 | if (((pdev->class & 0xFFFF00) == (PCI_CLASS_SYSTEM_SDHCI << 8)) && | |
157 | ((pdev->class & 0x0000FF) != PCI_SDHCI_IFDMA) && | |
158 | (host->flags & SDHCI_USE_DMA)) { | |
159 | dev_warn(&pdev->dev, "Will use DMA mode even though HW " | |
160 | "doesn't fully claim to support it.\n"); | |
161 | } | |
162 | ||
163 | ret = pci_set_dma_mask(pdev, DMA_32BIT_MASK); | |
164 | if (ret) | |
165 | return ret; | |
166 | ||
167 | pci_set_master(pdev); | |
168 | ||
169 | return 0; | |
170 | } | |
171 | ||
172 | static struct sdhci_ops sdhci_pci_ops = { | |
173 | .enable_dma = sdhci_pci_enable_dma, | |
174 | }; | |
175 | ||
176 | /*****************************************************************************\ | |
177 | * * | |
178 | * Suspend/resume * | |
179 | * * | |
180 | \*****************************************************************************/ | |
181 | ||
182 | #ifdef CONFIG_PM | |
183 | ||
184 | static int sdhci_pci_suspend (struct pci_dev *pdev, pm_message_t state) | |
185 | { | |
186 | struct sdhci_pci_chip *chip; | |
187 | struct sdhci_pci_slot *slot; | |
188 | int i, ret; | |
189 | ||
190 | chip = pci_get_drvdata(pdev); | |
191 | if (!chip) | |
192 | return 0; | |
193 | ||
194 | for (i = 0;i < chip->num_slots;i++) { | |
195 | slot = chip->slots[i]; | |
196 | if (!slot) | |
197 | continue; | |
198 | ||
199 | ret = sdhci_suspend_host(slot->host, state); | |
200 | ||
201 | if (ret) { | |
202 | for (i--;i >= 0;i--) | |
203 | sdhci_resume_host(chip->slots[i]->host); | |
204 | return ret; | |
205 | } | |
206 | } | |
207 | ||
208 | pci_save_state(pdev); | |
209 | pci_enable_wake(pdev, pci_choose_state(pdev, state), 0); | |
210 | pci_disable_device(pdev); | |
211 | pci_set_power_state(pdev, pci_choose_state(pdev, state)); | |
212 | ||
213 | return 0; | |
214 | } | |
215 | ||
216 | static int sdhci_pci_resume (struct pci_dev *pdev) | |
217 | { | |
218 | struct sdhci_pci_chip *chip; | |
219 | struct sdhci_pci_slot *slot; | |
220 | int i, ret; | |
221 | ||
222 | chip = pci_get_drvdata(pdev); | |
223 | if (!chip) | |
224 | return 0; | |
225 | ||
226 | pci_set_power_state(pdev, PCI_D0); | |
227 | pci_restore_state(pdev); | |
228 | ret = pci_enable_device(pdev); | |
229 | if (ret) | |
230 | return ret; | |
231 | ||
232 | for (i = 0;i < chip->num_slots;i++) { | |
233 | slot = chip->slots[i]; | |
234 | if (!slot) | |
235 | continue; | |
236 | ||
237 | ret = sdhci_resume_host(slot->host); | |
238 | if (ret) | |
239 | return ret; | |
240 | } | |
241 | ||
242 | return 0; | |
243 | } | |
244 | ||
245 | #else /* CONFIG_PM */ | |
246 | ||
247 | #define sdhci_pci_suspend NULL | |
248 | #define sdhci_pci_resume NULL | |
249 | ||
250 | #endif /* CONFIG_PM */ | |
251 | ||
252 | /*****************************************************************************\ | |
253 | * * | |
254 | * Device probing/removal * | |
255 | * * | |
256 | \*****************************************************************************/ | |
257 | ||
258 | static struct sdhci_pci_slot * __devinit sdhci_pci_probe_slot( | |
259 | struct pci_dev *pdev, struct sdhci_pci_chip *chip, int bar) | |
260 | { | |
261 | struct sdhci_pci_slot *slot; | |
262 | struct sdhci_host *host; | |
263 | ||
264 | resource_size_t addr; | |
265 | ||
266 | int ret; | |
267 | ||
268 | if (!(pci_resource_flags(pdev, bar) & IORESOURCE_MEM)) { | |
269 | dev_err(&pdev->dev, "BAR %d is not iomem. Aborting.\n", bar); | |
270 | return ERR_PTR(-ENODEV); | |
271 | } | |
272 | ||
273 | if (pci_resource_len(pdev, bar) != 0x100) { | |
274 | dev_err(&pdev->dev, "Invalid iomem size. You may " | |
275 | "experience problems.\n"); | |
276 | } | |
277 | ||
278 | if ((pdev->class & 0x0000FF) == PCI_SDHCI_IFVENDOR) { | |
279 | dev_err(&pdev->dev, "Vendor specific interface. Aborting.\n"); | |
280 | return ERR_PTR(-ENODEV); | |
281 | } | |
282 | ||
283 | if ((pdev->class & 0x0000FF) > PCI_SDHCI_IFVENDOR) { | |
284 | dev_err(&pdev->dev, "Unknown interface. Aborting.\n"); | |
285 | return ERR_PTR(-ENODEV); | |
286 | } | |
287 | ||
288 | host = sdhci_alloc_host(&pdev->dev, sizeof(struct sdhci_pci_slot)); | |
289 | if (IS_ERR(host)) { | |
290 | ret = PTR_ERR(host); | |
291 | goto unmap; | |
292 | } | |
293 | ||
294 | slot = sdhci_priv(host); | |
295 | ||
296 | slot->chip = chip; | |
297 | slot->host = host; | |
298 | slot->pci_bar = bar; | |
299 | ||
300 | host->hw_name = "PCI"; | |
301 | host->ops = &sdhci_pci_ops; | |
302 | host->quirks = chip->quirks; | |
303 | ||
304 | host->irq = pdev->irq; | |
305 | ||
306 | ret = pci_request_region(pdev, bar, mmc_hostname(host->mmc)); | |
307 | if (ret) { | |
308 | dev_err(&pdev->dev, "cannot request region\n"); | |
309 | return ERR_PTR(ret); | |
310 | } | |
311 | ||
312 | addr = pci_resource_start(pdev, bar); | |
313 | host->ioaddr = ioremap_nocache(addr, pci_resource_len(pdev, bar)); | |
314 | if (!host->ioaddr) { | |
315 | dev_err(&pdev->dev, "failed to remap registers\n"); | |
316 | goto release; | |
317 | } | |
318 | ||
319 | ret = sdhci_add_host(host); | |
320 | if (ret) | |
321 | goto unmap; | |
322 | ||
323 | return slot; | |
324 | ||
325 | unmap: | |
326 | iounmap(host->ioaddr); | |
327 | ||
328 | release: | |
329 | pci_release_region(pdev, bar); | |
330 | sdhci_free_host(host); | |
331 | ||
332 | return ERR_PTR(ret); | |
333 | } | |
334 | ||
335 | static void sdhci_pci_remove_slot(struct sdhci_pci_slot *slot) | |
336 | { | |
337 | sdhci_remove_host(slot->host); | |
338 | pci_release_region(slot->chip->pdev, slot->pci_bar); | |
339 | sdhci_free_host(slot->host); | |
340 | } | |
341 | ||
342 | static int __devinit sdhci_pci_probe(struct pci_dev *pdev, | |
343 | const struct pci_device_id *ent) | |
344 | { | |
345 | struct sdhci_pci_chip *chip; | |
346 | struct sdhci_pci_slot *slot; | |
347 | ||
348 | u8 slots, rev, first_bar; | |
349 | int ret, i; | |
350 | ||
351 | BUG_ON(pdev == NULL); | |
352 | BUG_ON(ent == NULL); | |
353 | ||
354 | pci_read_config_byte(pdev, PCI_CLASS_REVISION, &rev); | |
355 | ||
356 | dev_info(&pdev->dev, "SDHCI controller found [%04x:%04x] (rev %x)\n", | |
357 | (int)pdev->vendor, (int)pdev->device, (int)rev); | |
358 | ||
359 | ret = pci_read_config_byte(pdev, PCI_SLOT_INFO, &slots); | |
360 | if (ret) | |
361 | return ret; | |
362 | ||
363 | slots = PCI_SLOT_INFO_SLOTS(slots) + 1; | |
364 | dev_dbg(&pdev->dev, "found %d slot(s)\n", slots); | |
365 | if (slots == 0) | |
366 | return -ENODEV; | |
367 | ||
368 | BUG_ON(slots > MAX_SLOTS); | |
369 | ||
370 | ret = pci_read_config_byte(pdev, PCI_SLOT_INFO, &first_bar); | |
371 | if (ret) | |
372 | return ret; | |
373 | ||
374 | first_bar &= PCI_SLOT_INFO_FIRST_BAR_MASK; | |
375 | ||
376 | if (first_bar > 5) { | |
377 | dev_err(&pdev->dev, "Invalid first BAR. Aborting.\n"); | |
378 | return -ENODEV; | |
379 | } | |
380 | ||
381 | ret = pci_enable_device(pdev); | |
382 | if (ret) | |
383 | return ret; | |
384 | ||
385 | chip = kzalloc(sizeof(struct sdhci_pci_chip), GFP_KERNEL); | |
386 | if (!chip) { | |
387 | ret = -ENOMEM; | |
388 | goto err; | |
389 | } | |
390 | ||
391 | chip->pdev = pdev; | |
392 | chip->quirks = ent->driver_data; | |
393 | chip->num_slots = slots; | |
394 | ||
395 | pci_set_drvdata(pdev, chip); | |
396 | ||
397 | for (i = 0;i < slots;i++) { | |
398 | slot = sdhci_pci_probe_slot(pdev, chip, first_bar + i); | |
399 | if (IS_ERR(slot)) { | |
400 | for (i--;i >= 0;i--) | |
401 | sdhci_pci_remove_slot(chip->slots[i]); | |
402 | ret = PTR_ERR(slot); | |
403 | goto free; | |
404 | } | |
405 | ||
406 | chip->slots[i] = slot; | |
407 | } | |
408 | ||
409 | return 0; | |
410 | ||
411 | free: | |
412 | pci_set_drvdata(pdev, NULL); | |
413 | kfree(chip); | |
414 | ||
415 | err: | |
416 | pci_disable_device(pdev); | |
417 | return ret; | |
418 | } | |
419 | ||
420 | static void __devexit sdhci_pci_remove(struct pci_dev *pdev) | |
421 | { | |
422 | int i; | |
423 | struct sdhci_pci_chip *chip; | |
424 | ||
425 | chip = pci_get_drvdata(pdev); | |
426 | ||
427 | if (chip) { | |
428 | for (i = 0;i < chip->num_slots; i++) | |
429 | sdhci_pci_remove_slot(chip->slots[i]); | |
430 | ||
431 | pci_set_drvdata(pdev, NULL); | |
432 | kfree(chip); | |
433 | } | |
434 | ||
435 | pci_disable_device(pdev); | |
436 | } | |
437 | ||
438 | static struct pci_driver sdhci_driver = { | |
439 | .name = "sdhci-pci", | |
440 | .id_table = pci_ids, | |
441 | .probe = sdhci_pci_probe, | |
442 | .remove = __devexit_p(sdhci_pci_remove), | |
443 | .suspend = sdhci_pci_suspend, | |
444 | .resume = sdhci_pci_resume, | |
445 | }; | |
446 | ||
447 | /*****************************************************************************\ | |
448 | * * | |
449 | * Driver init/exit * | |
450 | * * | |
451 | \*****************************************************************************/ | |
452 | ||
453 | static int __init sdhci_drv_init(void) | |
454 | { | |
455 | return pci_register_driver(&sdhci_driver); | |
456 | } | |
457 | ||
458 | static void __exit sdhci_drv_exit(void) | |
459 | { | |
460 | pci_unregister_driver(&sdhci_driver); | |
461 | } | |
462 | ||
463 | module_init(sdhci_drv_init); | |
464 | module_exit(sdhci_drv_exit); | |
465 | ||
466 | MODULE_AUTHOR("Pierre Ossman <drzeus@drzeus.cx>"); | |
467 | MODULE_DESCRIPTION("Secure Digital Host Controller Interface PCI driver"); | |
468 | MODULE_LICENSE("GPL"); |