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PM: Rename dev_pm_info.in_suspend to is_prepared
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / drivers / mfd / t7l66xb.c
blob42830e6929649ae99e729479eb76dd1dd4bd917c
1 /*
2 *
3 * Toshiba T7L66XB core mfd support
4 *
5 * Copyright (c) 2005, 2007, 2008 Ian Molton
6 * Copyright (c) 2008 Dmitry Baryshkov
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License version 2 as
10 * published by the Free Software Foundation.
11 *
12 * T7L66 features:
13 *
14 * Supported in this driver:
15 * SD/MMC
16 * SM/NAND flash controller
17 *
18 * As yet not supported
19 * GPIO interface (on NAND pins)
20 * Serial interface
21 * TFT 'interface converter'
22 * PCMCIA interface logic
23 */
24
25 #include <linux/kernel.h>
26 #include <linux/module.h>
27 #include <linux/err.h>
28 #include <linux/io.h>
29 #include <linux/slab.h>
30 #include <linux/irq.h>
31 #include <linux/clk.h>
32 #include <linux/platform_device.h>
33 #include <linux/mfd/core.h>
34 #include <linux/mfd/tmio.h>
35 #include <linux/mfd/t7l66xb.h>
36
37 enum {
38 T7L66XB_CELL_NAND,
39 T7L66XB_CELL_MMC,
40 };
41
42 static const struct resource t7l66xb_mmc_resources[] = {
43 {
44 .start = 0x800,
45 .end = 0x9ff,
46 .flags = IORESOURCE_MEM,
47 },
48 {
49 .start = IRQ_T7L66XB_MMC,
50 .end = IRQ_T7L66XB_MMC,
51 .flags = IORESOURCE_IRQ,
52 },
53 };
54
55 #define SCR_REVID 0x08 /* b Revision ID */
56 #define SCR_IMR 0x42 /* b Interrupt Mask */
57 #define SCR_DEV_CTL 0xe0 /* b Device control */
58 #define SCR_ISR 0xe1 /* b Interrupt Status */
59 #define SCR_GPO_OC 0xf0 /* b GPO output control */
60 #define SCR_GPO_OS 0xf1 /* b GPO output enable */
61 #define SCR_GPI_S 0xf2 /* w GPI status */
62 #define SCR_APDC 0xf8 /* b Active pullup down ctrl */
63
64 #define SCR_DEV_CTL_USB BIT(0) /* USB enable */
65 #define SCR_DEV_CTL_MMC BIT(1) /* MMC enable */
66
67 /*--------------------------------------------------------------------------*/
68
69 struct t7l66xb {
70 void __iomem *scr;
71 /* Lock to protect registers requiring read/modify/write ops. */
72 spinlock_t lock;
73
74 struct resource rscr;
75 struct clk *clk48m;
76 struct clk *clk32k;
77 int irq;
78 int irq_base;
79 };
80
81 /*--------------------------------------------------------------------------*/
82
83 static int t7l66xb_mmc_enable(struct platform_device *mmc)
84 {
85 struct platform_device *dev = to_platform_device(mmc->dev.parent);
86 struct t7l66xb *t7l66xb = platform_get_drvdata(dev);
87 unsigned long flags;
88 u8 dev_ctl;
89
90 clk_enable(t7l66xb->clk32k);
91
92 spin_lock_irqsave(&t7l66xb->lock, flags);
93
94 dev_ctl = tmio_ioread8(t7l66xb->scr + SCR_DEV_CTL);
95 dev_ctl |= SCR_DEV_CTL_MMC;
96 tmio_iowrite8(dev_ctl, t7l66xb->scr + SCR_DEV_CTL);
97
98 spin_unlock_irqrestore(&t7l66xb->lock, flags);
99
100 tmio_core_mmc_enable(t7l66xb->scr + 0x200, 0,
101 t7l66xb_mmc_resources[0].start & 0xfffe);
102
103 return 0;
104 }
105
106 static int t7l66xb_mmc_disable(struct platform_device *mmc)
107 {
108 struct platform_device *dev = to_platform_device(mmc->dev.parent);
109 struct t7l66xb *t7l66xb = platform_get_drvdata(dev);
110 unsigned long flags;
111 u8 dev_ctl;
112
113 spin_lock_irqsave(&t7l66xb->lock, flags);
114
115 dev_ctl = tmio_ioread8(t7l66xb->scr + SCR_DEV_CTL);
116 dev_ctl &= ~SCR_DEV_CTL_MMC;
117 tmio_iowrite8(dev_ctl, t7l66xb->scr + SCR_DEV_CTL);
118
119 spin_unlock_irqrestore(&t7l66xb->lock, flags);
120
121 clk_disable(t7l66xb->clk32k);
122
123 return 0;
124 }
125
126 static void t7l66xb_mmc_pwr(struct platform_device *mmc, int state)
127 {
128 struct platform_device *dev = to_platform_device(mmc->dev.parent);
129 struct t7l66xb *t7l66xb = platform_get_drvdata(dev);
130
131 tmio_core_mmc_pwr(t7l66xb->scr + 0x200, 0, state);
132 }
133
134 static void t7l66xb_mmc_clk_div(struct platform_device *mmc, int state)
135 {
136 struct platform_device *dev = to_platform_device(mmc->dev.parent);
137 struct t7l66xb *t7l66xb = platform_get_drvdata(dev);
138
139 tmio_core_mmc_clk_div(t7l66xb->scr + 0x200, 0, state);
140 }
141
142 /*--------------------------------------------------------------------------*/
143
144 static struct tmio_mmc_data t7166xb_mmc_data = {
145 .hclk = 24000000,
146 .set_pwr = t7l66xb_mmc_pwr,
147 .set_clk_div = t7l66xb_mmc_clk_div,
148 };
149
150 static const struct resource t7l66xb_nand_resources[] = {
151 {
152 .start = 0xc00,
153 .end = 0xc07,
154 .flags = IORESOURCE_MEM,
155 },
156 {
157 .start = 0x0100,
158 .end = 0x01ff,
159 .flags = IORESOURCE_MEM,
160 },
161 {
162 .start = IRQ_T7L66XB_NAND,
163 .end = IRQ_T7L66XB_NAND,
164 .flags = IORESOURCE_IRQ,
165 },
166 };
167
168 static struct mfd_cell t7l66xb_cells[] = {
169 [T7L66XB_CELL_MMC] = {
170 .name = "tmio-mmc",
171 .enable = t7l66xb_mmc_enable,
172 .disable = t7l66xb_mmc_disable,
173 .mfd_data = &t7166xb_mmc_data,
174 .num_resources = ARRAY_SIZE(t7l66xb_mmc_resources),
175 .resources = t7l66xb_mmc_resources,
176 },
177 [T7L66XB_CELL_NAND] = {
178 .name = "tmio-nand",
179 .num_resources = ARRAY_SIZE(t7l66xb_nand_resources),
180 .resources = t7l66xb_nand_resources,
181 },
182 };
183
184 /*--------------------------------------------------------------------------*/
185
186 /* Handle the T7L66XB interrupt mux */
187 static void t7l66xb_irq(unsigned int irq, struct irq_desc *desc)
188 {
189 struct t7l66xb *t7l66xb = irq_get_handler_data(irq);
190 unsigned int isr;
191 unsigned int i, irq_base;
192
193 irq_base = t7l66xb->irq_base;
194
195 while ((isr = tmio_ioread8(t7l66xb->scr + SCR_ISR) &
196 ~tmio_ioread8(t7l66xb->scr + SCR_IMR)))
197 for (i = 0; i < T7L66XB_NR_IRQS; i++)
198 if (isr & (1 << i))
199 generic_handle_irq(irq_base + i);
200 }
201
202 static void t7l66xb_irq_mask(struct irq_data *data)
203 {
204 struct t7l66xb *t7l66xb = irq_data_get_irq_chip_data(data);
205 unsigned long flags;
206 u8 imr;
207
208 spin_lock_irqsave(&t7l66xb->lock, flags);
209 imr = tmio_ioread8(t7l66xb->scr + SCR_IMR);
210 imr |= 1 << (data->irq - t7l66xb->irq_base);
211 tmio_iowrite8(imr, t7l66xb->scr + SCR_IMR);
212 spin_unlock_irqrestore(&t7l66xb->lock, flags);
213 }
214
215 static void t7l66xb_irq_unmask(struct irq_data *data)
216 {
217 struct t7l66xb *t7l66xb = irq_data_get_irq_chip_data(data);
218 unsigned long flags;
219 u8 imr;
220
221 spin_lock_irqsave(&t7l66xb->lock, flags);
222 imr = tmio_ioread8(t7l66xb->scr + SCR_IMR);
223 imr &= ~(1 << (data->irq - t7l66xb->irq_base));
224 tmio_iowrite8(imr, t7l66xb->scr + SCR_IMR);
225 spin_unlock_irqrestore(&t7l66xb->lock, flags);
226 }
227
228 static struct irq_chip t7l66xb_chip = {
229 .name = "t7l66xb",
230 .irq_ack = t7l66xb_irq_mask,
231 .irq_mask = t7l66xb_irq_mask,
232 .irq_unmask = t7l66xb_irq_unmask,
233 };
234
235 /*--------------------------------------------------------------------------*/
236
237 /* Install the IRQ handler */
238 static void t7l66xb_attach_irq(struct platform_device *dev)
239 {
240 struct t7l66xb *t7l66xb = platform_get_drvdata(dev);
241 unsigned int irq, irq_base;
242
243 irq_base = t7l66xb->irq_base;
244
245 for (irq = irq_base; irq < irq_base + T7L66XB_NR_IRQS; irq++) {
246 irq_set_chip_and_handler(irq, &t7l66xb_chip, handle_level_irq);
247 irq_set_chip_data(irq, t7l66xb);
248 #ifdef CONFIG_ARM
249 set_irq_flags(irq, IRQF_VALID | IRQF_PROBE);
250 #endif
251 }
252
253 irq_set_irq_type(t7l66xb->irq, IRQ_TYPE_EDGE_FALLING);
254 irq_set_handler_data(t7l66xb->irq, t7l66xb);
255 irq_set_chained_handler(t7l66xb->irq, t7l66xb_irq);
256 }
257
258 static void t7l66xb_detach_irq(struct platform_device *dev)
259 {
260 struct t7l66xb *t7l66xb = platform_get_drvdata(dev);
261 unsigned int irq, irq_base;
262
263 irq_base = t7l66xb->irq_base;
264
265 irq_set_chained_handler(t7l66xb->irq, NULL);
266 irq_set_handler_data(t7l66xb->irq, NULL);
267
268 for (irq = irq_base; irq < irq_base + T7L66XB_NR_IRQS; irq++) {
269 #ifdef CONFIG_ARM
270 set_irq_flags(irq, 0);
271 #endif
272 irq_set_chip(irq, NULL);
273 irq_set_chip_data(irq, NULL);
274 }
275 }
276
277 /*--------------------------------------------------------------------------*/
278
279 #ifdef CONFIG_PM
280 static int t7l66xb_suspend(struct platform_device *dev, pm_message_t state)
281 {
282 struct t7l66xb *t7l66xb = platform_get_drvdata(dev);
283 struct t7l66xb_platform_data *pdata = dev->dev.platform_data;
284
285 if (pdata && pdata->suspend)
286 pdata->suspend(dev);
287 clk_disable(t7l66xb->clk48m);
288
289 return 0;
290 }
291
292 static int t7l66xb_resume(struct platform_device *dev)
293 {
294 struct t7l66xb *t7l66xb = platform_get_drvdata(dev);
295 struct t7l66xb_platform_data *pdata = dev->dev.platform_data;
296
297 clk_enable(t7l66xb->clk48m);
298 if (pdata && pdata->resume)
299 pdata->resume(dev);
300
301 tmio_core_mmc_enable(t7l66xb->scr + 0x200, 0,
302 t7l66xb_mmc_resources[0].start & 0xfffe);
303
304 return 0;
305 }
306 #else
307 #define t7l66xb_suspend NULL
308 #define t7l66xb_resume NULL
309 #endif
310
311 /*--------------------------------------------------------------------------*/
312
313 static int t7l66xb_probe(struct platform_device *dev)
314 {
315 struct t7l66xb_platform_data *pdata = dev->dev.platform_data;
316 struct t7l66xb *t7l66xb;
317 struct resource *iomem, *rscr;
318 int ret;
319
320 if (pdata == NULL)
321 return -EINVAL;
322
323 iomem = platform_get_resource(dev, IORESOURCE_MEM, 0);
324 if (!iomem)
325 return -EINVAL;
326
327 t7l66xb = kzalloc(sizeof *t7l66xb, GFP_KERNEL);
328 if (!t7l66xb)
329 return -ENOMEM;
330
331 spin_lock_init(&t7l66xb->lock);
332
333 platform_set_drvdata(dev, t7l66xb);
334
335 ret = platform_get_irq(dev, 0);
336 if (ret >= 0)
337 t7l66xb->irq = ret;
338 else
339 goto err_noirq;
340
341 t7l66xb->irq_base = pdata->irq_base;
342
343 t7l66xb->clk32k = clk_get(&dev->dev, "CLK_CK32K");
344 if (IS_ERR(t7l66xb->clk32k)) {
345 ret = PTR_ERR(t7l66xb->clk32k);
346 goto err_clk32k_get;
347 }
348
349 t7l66xb->clk48m = clk_get(&dev->dev, "CLK_CK48M");
350 if (IS_ERR(t7l66xb->clk48m)) {
351 ret = PTR_ERR(t7l66xb->clk48m);
352 goto err_clk48m_get;
353 }
354
355 rscr = &t7l66xb->rscr;
356 rscr->name = "t7l66xb-core";
357 rscr->start = iomem->start;
358 rscr->end = iomem->start + 0xff;
359 rscr->flags = IORESOURCE_MEM;
360
361 ret = request_resource(iomem, rscr);
362 if (ret)
363 goto err_request_scr;
364
365 t7l66xb->scr = ioremap(rscr->start, resource_size(rscr));
366 if (!t7l66xb->scr) {
367 ret = -ENOMEM;
368 goto err_ioremap;
369 }
370
371 clk_enable(t7l66xb->clk48m);
372
373 if (pdata && pdata->enable)
374 pdata->enable(dev);
375
376 /* Mask all interrupts */
377 tmio_iowrite8(0xbf, t7l66xb->scr + SCR_IMR);
378
379 printk(KERN_INFO "%s rev %d @ 0x%08lx, irq %d\n",
380 dev->name, tmio_ioread8(t7l66xb->scr + SCR_REVID),
381 (unsigned long)iomem->start, t7l66xb->irq);
382
383 t7l66xb_attach_irq(dev);
384
385 t7l66xb_cells[T7L66XB_CELL_NAND].mfd_data = pdata->nand_data;
386
387 ret = mfd_add_devices(&dev->dev, dev->id,
388 t7l66xb_cells, ARRAY_SIZE(t7l66xb_cells),
389 iomem, t7l66xb->irq_base);
390
391 if (!ret)
392 return 0;
393
394 t7l66xb_detach_irq(dev);
395 iounmap(t7l66xb->scr);
396 err_ioremap:
397 release_resource(&t7l66xb->rscr);
398 err_request_scr:
399 clk_put(t7l66xb->clk48m);
400 err_clk48m_get:
401 clk_put(t7l66xb->clk32k);
402 err_clk32k_get:
403 err_noirq:
404 kfree(t7l66xb);
405 return ret;
406 }
407
408 static int t7l66xb_remove(struct platform_device *dev)
409 {
410 struct t7l66xb_platform_data *pdata = dev->dev.platform_data;
411 struct t7l66xb *t7l66xb = platform_get_drvdata(dev);
412 int ret;
413
414 ret = pdata->disable(dev);
415 clk_disable(t7l66xb->clk48m);
416 clk_put(t7l66xb->clk48m);
417 clk_disable(t7l66xb->clk32k);
418 clk_put(t7l66xb->clk32k);
419 t7l66xb_detach_irq(dev);
420 iounmap(t7l66xb->scr);
421 release_resource(&t7l66xb->rscr);
422 mfd_remove_devices(&dev->dev);
423 platform_set_drvdata(dev, NULL);
424 kfree(t7l66xb);
425
426 return ret;
427
428 }
429
430 static struct platform_driver t7l66xb_platform_driver = {
431 .driver = {
432 .name = "t7l66xb",
433 .owner = THIS_MODULE,
434 },
435 .suspend = t7l66xb_suspend,
436 .resume = t7l66xb_resume,
437 .probe = t7l66xb_probe,
438 .remove = t7l66xb_remove,
439 };
440
441 /*--------------------------------------------------------------------------*/
442
443 static int __init t7l66xb_init(void)
444 {
445 int retval = 0;
446
447 retval = platform_driver_register(&t7l66xb_platform_driver);
448 return retval;
449 }
450
451 static void __exit t7l66xb_exit(void)
452 {
453 platform_driver_unregister(&t7l66xb_platform_driver);
454 }
455
456 module_init(t7l66xb_init);
457 module_exit(t7l66xb_exit);
458
459 MODULE_DESCRIPTION("Toshiba T7L66XB core driver");
460 MODULE_LICENSE("GPL v2");
461 MODULE_AUTHOR("Ian Molton");
462 MODULE_ALIAS("platform:t7l66xb");
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