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tifm: fix memorystick host initialization code
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4020f2d7
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1/*
2 * tifm_7xx1.c - TI FlashMedia driver
3 *
4 * Copyright (C) 2006 Alex Dubov <oakad@yahoo.com>
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 as
8 * published by the Free Software Foundation.
9 *
10 */
11
12#include <linux/tifm.h>
c4030698 13#include <linux/dma-mapping.h>
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14
15#define DRIVER_NAME "tifm_7xx1"
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16#define DRIVER_VERSION "0.8"
17
18#define TIFM_IRQ_ENABLE 0x80000000
19#define TIFM_IRQ_SOCKMASK(x) (x)
20#define TIFM_IRQ_CARDMASK(x) ((x) << 8)
21#define TIFM_IRQ_FIFOMASK(x) ((x) << 16)
22#define TIFM_IRQ_SETALL 0xffffffff
4020f2d7 23
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24static void tifm_7xx1_dummy_eject(struct tifm_adapter *fm,
25 struct tifm_dev *sock)
26{
27}
28
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29static void tifm_7xx1_eject(struct tifm_adapter *fm, struct tifm_dev *sock)
30{
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31 unsigned long flags;
32
33 spin_lock_irqsave(&fm->lock, flags);
7146f0d3 34 fm->socket_change_set |= 1 << sock->socket_id;
3540af8f 35 tifm_queue_work(&fm->media_switcher);
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36 spin_unlock_irqrestore(&fm->lock, flags);
37}
38
7d12e780 39static irqreturn_t tifm_7xx1_isr(int irq, void *dev_id)
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40{
41 struct tifm_adapter *fm = dev_id;
217334d1 42 struct tifm_dev *sock;
91f8d011 43 unsigned int irq_status, cnt;
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44
45 spin_lock(&fm->lock);
46 irq_status = readl(fm->addr + FM_INTERRUPT_STATUS);
47 if (irq_status == 0 || irq_status == (~0)) {
48 spin_unlock(&fm->lock);
49 return IRQ_NONE;
50 }
51
52 if (irq_status & TIFM_IRQ_ENABLE) {
53 writel(TIFM_IRQ_ENABLE, fm->addr + FM_CLEAR_INTERRUPT_ENABLE);
54
8b40adab 55 for (cnt = 0; cnt < fm->num_sockets; cnt++) {
217334d1 56 sock = fm->sockets[cnt];
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57 if (sock) {
58 if ((irq_status >> cnt) & TIFM_IRQ_FIFOMASK(1))
59 sock->data_event(sock);
60 if ((irq_status >> cnt) & TIFM_IRQ_CARDMASK(1))
61 sock->card_event(sock);
62 }
4020f2d7 63 }
6412d927 64
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65 fm->socket_change_set |= irq_status
66 & ((1 << fm->num_sockets) - 1);
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67 }
68 writel(irq_status, fm->addr + FM_INTERRUPT_STATUS);
69
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70 if (fm->finish_me)
71 complete_all(fm->finish_me);
72 else if (!fm->socket_change_set)
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73 writel(TIFM_IRQ_ENABLE, fm->addr + FM_SET_INTERRUPT_ENABLE);
74 else
3540af8f 75 tifm_queue_work(&fm->media_switcher);
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76
77 spin_unlock(&fm->lock);
78 return IRQ_HANDLED;
79}
80
342c0ec4 81static unsigned char tifm_7xx1_toggle_sock_power(char __iomem *sock_addr)
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82{
83 unsigned int s_state;
84 int cnt;
85
86 writel(0x0e00, sock_addr + SOCK_CONTROL);
87
342c0ec4 88 for (cnt = 16; cnt <= 256; cnt <<= 1) {
8b40adab
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89 if (!(TIFM_SOCK_STATE_POWERED
90 & readl(sock_addr + SOCK_PRESENT_STATE)))
4020f2d7 91 break;
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92
93 msleep(cnt);
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94 }
95
96 s_state = readl(sock_addr + SOCK_PRESENT_STATE);
97 if (!(TIFM_SOCK_STATE_OCCUPIED & s_state))
e23f2b8a 98 return 0;
4020f2d7 99
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100 writel(readl(sock_addr + SOCK_CONTROL) | TIFM_CTRL_LED,
101 sock_addr + SOCK_CONTROL);
4020f2d7 102
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103 /* xd needs some extra time before power on */
104 if (((readl(sock_addr + SOCK_PRESENT_STATE) >> 4) & 7)
105 == TIFM_TYPE_XD)
106 msleep(40);
107
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108 writel((s_state & TIFM_CTRL_POWER_MASK) | 0x0c00,
109 sock_addr + SOCK_CONTROL);
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110 /* wait for power to stabilize */
111 msleep(20);
112 for (cnt = 16; cnt <= 256; cnt <<= 1) {
8b40adab
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113 if ((TIFM_SOCK_STATE_POWERED
114 & readl(sock_addr + SOCK_PRESENT_STATE)))
4020f2d7 115 break;
342c0ec4
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116
117 msleep(cnt);
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118 }
119
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120 writel(readl(sock_addr + SOCK_CONTROL) & (~TIFM_CTRL_LED),
121 sock_addr + SOCK_CONTROL);
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122
123 return (readl(sock_addr + SOCK_PRESENT_STATE) >> 4) & 7;
124}
125
055b8224
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126inline static void tifm_7xx1_sock_power_off(char __iomem *sock_addr)
127{
128 writel((~TIFM_CTRL_POWER_MASK) & readl(sock_addr + SOCK_CONTROL),
129 sock_addr + SOCK_CONTROL);
130}
131
e069d79d
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132inline static char __iomem *
133tifm_7xx1_sock_addr(char __iomem *base_addr, unsigned int sock_num)
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134{
135 return base_addr + ((sock_num + 1) << 10);
136}
137
3540af8f 138static void tifm_7xx1_switch_media(struct work_struct *work)
4020f2d7 139{
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140 struct tifm_adapter *fm = container_of(work, struct tifm_adapter,
141 media_switcher);
91f8d011 142 struct tifm_dev *sock;
055b8224 143 char __iomem *sock_addr;
4020f2d7 144 unsigned long flags;
e23f2b8a 145 unsigned char media_id;
91f8d011 146 unsigned int socket_change_set, cnt;
4020f2d7 147
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148 spin_lock_irqsave(&fm->lock, flags);
149 socket_change_set = fm->socket_change_set;
150 fm->socket_change_set = 0;
6412d927 151
7dd817d0 152 dev_dbg(fm->dev.parent, "checking media set %x\n",
3540af8f 153 socket_change_set);
6412d927 154
3540af8f 155 if (!socket_change_set) {
4020f2d7 156 spin_unlock_irqrestore(&fm->lock, flags);
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157 return;
158 }
4020f2d7 159
2428a8fe
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160 for (cnt = 0; cnt < fm->num_sockets; cnt++) {
161 if (!(socket_change_set & (1 << cnt)))
162 continue;
163 sock = fm->sockets[cnt];
164 if (sock) {
165 printk(KERN_INFO
166 "%s : demand removing card from socket %u:%u\n",
7dd817d0 167 fm->dev.bus_id, fm->id, cnt);
2428a8fe 168 fm->sockets[cnt] = NULL;
055b8224 169 sock_addr = sock->addr;
6412d927 170 spin_unlock_irqrestore(&fm->lock, flags);
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171 device_unregister(&sock->dev);
172 spin_lock_irqsave(&fm->lock, flags);
055b8224
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173 tifm_7xx1_sock_power_off(sock_addr);
174 writel(0x0e00, sock_addr + SOCK_CONTROL);
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175 }
176
177 spin_unlock_irqrestore(&fm->lock, flags);
178
179 media_id = tifm_7xx1_toggle_sock_power(
180 tifm_7xx1_sock_addr(fm->addr, cnt));
181
182 // tifm_alloc_device will check if media_id is valid
183 sock = tifm_alloc_device(fm, cnt, media_id);
184 if (sock) {
185 sock->addr = tifm_7xx1_sock_addr(fm->addr, cnt);
186
187 if (!device_register(&sock->dev)) {
6412d927 188 spin_lock_irqsave(&fm->lock, flags);
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189 if (!fm->sockets[cnt]) {
190 fm->sockets[cnt] = sock;
191 sock = NULL;
192 }
193 spin_unlock_irqrestore(&fm->lock, flags);
6412d927 194 }
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195 if (sock)
196 tifm_free_device(&sock->dev);
6412d927 197 }
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198 spin_lock_irqsave(&fm->lock, flags);
199 }
6412d927 200
3540af8f
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201 writel(TIFM_IRQ_FIFOMASK(socket_change_set)
202 | TIFM_IRQ_CARDMASK(socket_change_set),
203 fm->addr + FM_CLEAR_INTERRUPT_ENABLE);
204
205 writel(TIFM_IRQ_FIFOMASK(socket_change_set)
206 | TIFM_IRQ_CARDMASK(socket_change_set),
207 fm->addr + FM_SET_INTERRUPT_ENABLE);
208
209 writel(TIFM_IRQ_ENABLE, fm->addr + FM_SET_INTERRUPT_ENABLE);
210 spin_unlock_irqrestore(&fm->lock, flags);
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211}
212
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213#ifdef CONFIG_PM
214
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215static int tifm_7xx1_suspend(struct pci_dev *dev, pm_message_t state)
216{
055b8224
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217 struct tifm_adapter *fm = pci_get_drvdata(dev);
218 int cnt;
219
7146f0d3 220 dev_dbg(&dev->dev, "suspending host\n");
4020f2d7 221
055b8224
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222 for (cnt = 0; cnt < fm->num_sockets; cnt++) {
223 if (fm->sockets[cnt])
224 tifm_7xx1_sock_power_off(fm->sockets[cnt]->addr);
225 }
226
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227 pci_save_state(dev);
228 pci_enable_wake(dev, pci_choose_state(dev, state), 0);
229 pci_disable_device(dev);
230 pci_set_power_state(dev, pci_choose_state(dev, state));
4020f2d7
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231 return 0;
232}
233
234static int tifm_7xx1_resume(struct pci_dev *dev)
235{
236 struct tifm_adapter *fm = pci_get_drvdata(dev);
88de1b2f
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237 int rc;
238 unsigned int good_sockets = 0, bad_sockets = 0;
4020f2d7 239 unsigned long flags;
e23f2b8a 240 unsigned char new_ids[fm->num_sockets];
3540af8f 241 DECLARE_COMPLETION_ONSTACK(finish_resume);
4020f2d7 242
7146f0d3 243 pci_set_power_state(dev, PCI_D0);
4020f2d7 244 pci_restore_state(dev);
7146f0d3
AD
245 rc = pci_enable_device(dev);
246 if (rc)
247 return rc;
248 pci_set_master(dev);
249
250 dev_dbg(&dev->dev, "resuming host\n");
4020f2d7 251
88de1b2f
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252 for (rc = 0; rc < fm->num_sockets; rc++)
253 new_ids[rc] = tifm_7xx1_toggle_sock_power(
254 tifm_7xx1_sock_addr(fm->addr, rc));
4020f2d7 255 spin_lock_irqsave(&fm->lock, flags);
88de1b2f
AD
256 for (rc = 0; rc < fm->num_sockets; rc++) {
257 if (fm->sockets[rc]) {
258 if (fm->sockets[rc]->type == new_ids[rc])
259 good_sockets |= 1 << rc;
260 else
261 bad_sockets |= 1 << rc;
7146f0d3
AD
262 }
263 }
264
6412d927 265 writel(TIFM_IRQ_ENABLE | TIFM_IRQ_SOCKMASK((1 << fm->num_sockets) - 1),
7146f0d3 266 fm->addr + FM_SET_INTERRUPT_ENABLE);
88de1b2f
AD
267 dev_dbg(&dev->dev, "change sets on resume: good %x, bad %x\n",
268 good_sockets, bad_sockets);
269
270 fm->socket_change_set = 0;
271 if (good_sockets) {
3540af8f 272 fm->finish_me = &finish_resume;
7146f0d3 273 spin_unlock_irqrestore(&fm->lock, flags);
88de1b2f
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274 rc = wait_for_completion_timeout(&finish_resume, HZ);
275 dev_dbg(&dev->dev, "wait returned %d\n", rc);
276 writel(TIFM_IRQ_FIFOMASK(good_sockets)
277 | TIFM_IRQ_CARDMASK(good_sockets),
278 fm->addr + FM_CLEAR_INTERRUPT_ENABLE);
279 writel(TIFM_IRQ_FIFOMASK(good_sockets)
280 | TIFM_IRQ_CARDMASK(good_sockets),
281 fm->addr + FM_SET_INTERRUPT_ENABLE);
282 spin_lock_irqsave(&fm->lock, flags);
283 fm->finish_me = NULL;
284 fm->socket_change_set ^= good_sockets & fm->socket_change_set;
7146f0d3
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285 }
286
88de1b2f
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287 fm->socket_change_set |= bad_sockets;
288 if (fm->socket_change_set)
289 tifm_queue_work(&fm->media_switcher);
7146f0d3 290
88de1b2f 291 spin_unlock_irqrestore(&fm->lock, flags);
7146f0d3
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292 writel(TIFM_IRQ_ENABLE,
293 fm->addr + FM_SET_INTERRUPT_ENABLE);
7146f0d3 294
4020f2d7
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295 return 0;
296}
297
7146f0d3
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298#else
299
300#define tifm_7xx1_suspend NULL
301#define tifm_7xx1_resume NULL
302
303#endif /* CONFIG_PM */
304
baf8532a
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305static int tifm_7xx1_dummy_has_ms_pif(struct tifm_adapter *fm,
306 struct tifm_dev *sock)
307{
308 return 0;
309}
310
311static int tifm_7xx1_has_ms_pif(struct tifm_adapter *fm, struct tifm_dev *sock)
312{
313 if (((fm->num_sockets == 4) && (sock->socket_id == 2))
314 || ((fm->num_sockets == 2) && (sock->socket_id == 0)))
315 return 1;
316
317 return 0;
318}
319
4020f2d7 320static int tifm_7xx1_probe(struct pci_dev *dev,
8b40adab 321 const struct pci_device_id *dev_id)
4020f2d7
AD
322{
323 struct tifm_adapter *fm;
324 int pci_dev_busy = 0;
325 int rc;
326
327 rc = pci_set_dma_mask(dev, DMA_32BIT_MASK);
328 if (rc)
329 return rc;
330
331 rc = pci_enable_device(dev);
332 if (rc)
333 return rc;
334
335 pci_set_master(dev);
336
337 rc = pci_request_regions(dev, DRIVER_NAME);
338 if (rc) {
339 pci_dev_busy = 1;
340 goto err_out;
341 }
342
343 pci_intx(dev, 1);
344
6113ed73
AD
345 fm = tifm_alloc_adapter(dev->device == PCI_DEVICE_ID_TI_XX21_XX11_FM
346 ? 4 : 2, &dev->dev);
4020f2d7
AD
347 if (!fm) {
348 rc = -ENOMEM;
349 goto err_out_int;
350 }
351
3540af8f 352 INIT_WORK(&fm->media_switcher, tifm_7xx1_switch_media);
4020f2d7 353 fm->eject = tifm_7xx1_eject;
baf8532a 354 fm->has_ms_pif = tifm_7xx1_has_ms_pif;
4020f2d7
AD
355 pci_set_drvdata(dev, fm);
356
357 fm->addr = ioremap(pci_resource_start(dev, 0),
8b40adab 358 pci_resource_len(dev, 0));
4020f2d7
AD
359 if (!fm->addr)
360 goto err_out_free;
361
bc913b18 362 rc = request_irq(dev->irq, tifm_7xx1_isr, IRQF_SHARED, DRIVER_NAME, fm);
4020f2d7
AD
363 if (rc)
364 goto err_out_unmap;
365
3540af8f 366 rc = tifm_add_adapter(fm);
4020f2d7
AD
367 if (rc)
368 goto err_out_irq;
369
6412d927 370 writel(TIFM_IRQ_ENABLE | TIFM_IRQ_SOCKMASK((1 << fm->num_sockets) - 1),
8b40adab 371 fm->addr + FM_SET_INTERRUPT_ENABLE);
4020f2d7
AD
372 return 0;
373
374err_out_irq:
375 free_irq(dev->irq, fm);
376err_out_unmap:
377 iounmap(fm->addr);
378err_out_free:
379 pci_set_drvdata(dev, NULL);
380 tifm_free_adapter(fm);
381err_out_int:
382 pci_intx(dev, 0);
383 pci_release_regions(dev);
384err_out:
385 if (!pci_dev_busy)
386 pci_disable_device(dev);
387 return rc;
388}
389
390static void tifm_7xx1_remove(struct pci_dev *dev)
391{
392 struct tifm_adapter *fm = pci_get_drvdata(dev);
055b8224 393 int cnt;
4020f2d7 394
6113ed73 395 fm->eject = tifm_7xx1_dummy_eject;
baf8532a 396 fm->has_ms_pif = tifm_7xx1_dummy_has_ms_pif;
7146f0d3
AD
397 writel(TIFM_IRQ_SETALL, fm->addr + FM_CLEAR_INTERRUPT_ENABLE);
398 mmiowb();
399 free_irq(dev->irq, fm);
400
4020f2d7
AD
401 tifm_remove_adapter(fm);
402
055b8224
AD
403 for (cnt = 0; cnt < fm->num_sockets; cnt++)
404 tifm_7xx1_sock_power_off(tifm_7xx1_sock_addr(fm->addr, cnt));
405
e069d79d 406 pci_set_drvdata(dev, NULL);
4020f2d7
AD
407
408 iounmap(fm->addr);
409 pci_intx(dev, 0);
410 pci_release_regions(dev);
411
412 pci_disable_device(dev);
413 tifm_free_adapter(fm);
414}
415
416static struct pci_device_id tifm_7xx1_pci_tbl [] = {
b5ad6761
AD
417 { PCI_VENDOR_ID_TI, PCI_DEVICE_ID_TI_XX21_XX11_FM, PCI_ANY_ID,
418 PCI_ANY_ID, 0, 0, 0 }, /* xx21 - the one I have */
419 { PCI_VENDOR_ID_TI, PCI_DEVICE_ID_TI_XX12_FM, PCI_ANY_ID,
420 PCI_ANY_ID, 0, 0, 0 },
421 { PCI_VENDOR_ID_TI, PCI_DEVICE_ID_TI_XX20_FM, PCI_ANY_ID,
422 PCI_ANY_ID, 0, 0, 0 },
4020f2d7
AD
423 { }
424};
425
426static struct pci_driver tifm_7xx1_driver = {
427 .name = DRIVER_NAME,
428 .id_table = tifm_7xx1_pci_tbl,
429 .probe = tifm_7xx1_probe,
430 .remove = tifm_7xx1_remove,
431 .suspend = tifm_7xx1_suspend,
432 .resume = tifm_7xx1_resume,
433};
434
435static int __init tifm_7xx1_init(void)
436{
437 return pci_register_driver(&tifm_7xx1_driver);
438}
439
440static void __exit tifm_7xx1_exit(void)
441{
442 pci_unregister_driver(&tifm_7xx1_driver);
443}
444
445MODULE_AUTHOR("Alex Dubov");
446MODULE_DESCRIPTION("TI FlashMedia host driver");
447MODULE_LICENSE("GPL");
448MODULE_DEVICE_TABLE(pci, tifm_7xx1_pci_tbl);
449MODULE_VERSION(DRIVER_VERSION);
450
451module_init(tifm_7xx1_init);
452module_exit(tifm_7xx1_exit);