mfd: t7l66 MMC platform data
[linux-2.6.git] / drivers / mfd / t7l66xb.c
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/io.h>
28 #include <linux/irq.h>
29 #include <linux/platform_device.h>
30 #include <linux/mfd/core.h>
31 #include <linux/mfd/tmio.h>
32 #include <linux/mfd/t7l66xb.h>
33
34 enum {
35         T7L66XB_CELL_NAND,
36         T7L66XB_CELL_MMC,
37 };
38
39 #define SCR_REVID       0x08            /* b Revision ID        */
40 #define SCR_IMR         0x42            /* b Interrupt Mask     */
41 #define SCR_DEV_CTL     0xe0            /* b Device control     */
42 #define SCR_ISR         0xe1            /* b Interrupt Status   */
43 #define SCR_GPO_OC      0xf0            /* b GPO output control */
44 #define SCR_GPO_OS      0xf1            /* b GPO output enable  */
45 #define SCR_GPI_S       0xf2            /* w GPI status         */
46 #define SCR_APDC        0xf8            /* b Active pullup down ctrl */
47
48 #define SCR_DEV_CTL_USB         BIT(0)  /* USB enable           */
49 #define SCR_DEV_CTL_MMC         BIT(1)  /* MMC enable           */
50
51 /*--------------------------------------------------------------------------*/
52
53 struct t7l66xb {
54         void __iomem            *scr;
55         /* Lock to protect registers requiring read/modify/write ops. */
56         spinlock_t              lock;
57
58         struct resource         rscr;
59         int                     irq;
60         int                     irq_base;
61 };
62
63 /*--------------------------------------------------------------------------*/
64
65 static int t7l66xb_mmc_enable(struct platform_device *mmc)
66 {
67         struct platform_device *dev = to_platform_device(mmc->dev.parent);
68         struct t7l66xb_platform_data   *pdata = dev->dev.platform_data;
69         struct t7l66xb *t7l66xb = platform_get_drvdata(dev);
70         unsigned long flags;
71         u8 dev_ctl;
72
73         if (pdata->enable_clk32k)
74                 pdata->enable_clk32k(dev);
75
76         spin_lock_irqsave(&t7l66xb->lock, flags);
77
78         dev_ctl = tmio_ioread8(t7l66xb->scr + SCR_DEV_CTL);
79         dev_ctl |= SCR_DEV_CTL_MMC;
80         tmio_iowrite8(dev_ctl, t7l66xb->scr + SCR_DEV_CTL);
81
82         spin_unlock_irqrestore(&t7l66xb->lock, flags);
83
84         return 0;
85 }
86
87 static int t7l66xb_mmc_disable(struct platform_device *mmc)
88 {
89         struct platform_device *dev = to_platform_device(mmc->dev.parent);
90         struct t7l66xb_platform_data   *pdata = dev->dev.platform_data;
91         struct t7l66xb *t7l66xb = platform_get_drvdata(dev);
92         unsigned long flags;
93         u8 dev_ctl;
94
95         spin_lock_irqsave(&t7l66xb->lock, flags);
96
97         dev_ctl = tmio_ioread8(t7l66xb->scr + SCR_DEV_CTL);
98         dev_ctl &= ~SCR_DEV_CTL_MMC;
99         tmio_iowrite8(dev_ctl, t7l66xb->scr + SCR_DEV_CTL);
100
101         spin_unlock_irqrestore(&t7l66xb->lock, flags);
102
103         if (pdata->disable_clk32k)
104                 pdata->disable_clk32k(dev);
105
106         return 0;
107 }
108
109 /*--------------------------------------------------------------------------*/
110
111 const static struct resource t7l66xb_mmc_resources[] = {
112         {
113                 .start = 0x800,
114                 .end    = 0x9ff,
115                 .flags = IORESOURCE_MEM,
116         },
117         {
118                 .start = 0x200,
119                 .end    = 0x2ff,
120                 .flags = IORESOURCE_MEM,
121         },
122         {
123                 .start = IRQ_T7L66XB_MMC,
124                 .end    = IRQ_T7L66XB_MMC,
125                 .flags = IORESOURCE_IRQ,
126         },
127 };
128
129 const static struct resource t7l66xb_nand_resources[] = {
130         {
131                 .start  = 0xc00,
132                 .end    = 0xc07,
133                 .flags  = IORESOURCE_MEM,
134         },
135         {
136                 .start  = 0x0100,
137                 .end    = 0x01ff,
138                 .flags  = IORESOURCE_MEM,
139         },
140         {
141                 .start  = IRQ_T7L66XB_NAND,
142                 .end    = IRQ_T7L66XB_NAND,
143                 .flags  = IORESOURCE_IRQ,
144         },
145 };
146
147 static struct mfd_cell t7l66xb_cells[] = {
148         [T7L66XB_CELL_MMC] = {
149                 .name = "tmio-mmc",
150                 .enable = t7l66xb_mmc_enable,
151                 .disable = t7l66xb_mmc_disable,
152                 .num_resources = ARRAY_SIZE(t7l66xb_mmc_resources),
153                 .resources = t7l66xb_mmc_resources,
154         },
155         [T7L66XB_CELL_NAND] = {
156                 .name = "tmio-nand",
157                 .num_resources = ARRAY_SIZE(t7l66xb_nand_resources),
158                 .resources = t7l66xb_nand_resources,
159         },
160 };
161
162 /*--------------------------------------------------------------------------*/
163
164 /* Handle the T7L66XB interrupt mux */
165 static void t7l66xb_irq(unsigned int irq, struct irq_desc *desc)
166 {
167         struct t7l66xb *t7l66xb = get_irq_data(irq);
168         unsigned int isr;
169         unsigned int i, irq_base;
170
171         irq_base = t7l66xb->irq_base;
172
173         while ((isr = tmio_ioread8(t7l66xb->scr + SCR_ISR) &
174                                 ~tmio_ioread8(t7l66xb->scr + SCR_IMR)))
175                 for (i = 0; i < T7L66XB_NR_IRQS; i++)
176                         if (isr & (1 << i))
177                                 generic_handle_irq(irq_base + i);
178 }
179
180 static void t7l66xb_irq_mask(unsigned int irq)
181 {
182         struct t7l66xb *t7l66xb = get_irq_chip_data(irq);
183         unsigned long                   flags;
184         u8 imr;
185
186         spin_lock_irqsave(&t7l66xb->lock, flags);
187         imr = tmio_ioread8(t7l66xb->scr + SCR_IMR);
188         imr |= 1 << (irq - t7l66xb->irq_base);
189         tmio_iowrite8(imr, t7l66xb->scr + SCR_IMR);
190         spin_unlock_irqrestore(&t7l66xb->lock, flags);
191 }
192
193 static void t7l66xb_irq_unmask(unsigned int irq)
194 {
195         struct t7l66xb *t7l66xb = get_irq_chip_data(irq);
196         unsigned long flags;
197         u8 imr;
198
199         spin_lock_irqsave(&t7l66xb->lock, flags);
200         imr = tmio_ioread8(t7l66xb->scr + SCR_IMR);
201         imr &= ~(1 << (irq - t7l66xb->irq_base));
202         tmio_iowrite8(imr, t7l66xb->scr + SCR_IMR);
203         spin_unlock_irqrestore(&t7l66xb->lock, flags);
204 }
205
206 static struct irq_chip t7l66xb_chip = {
207         .name   = "t7l66xb",
208         .ack    = t7l66xb_irq_mask,
209         .mask   = t7l66xb_irq_mask,
210         .unmask = t7l66xb_irq_unmask,
211 };
212
213 /*--------------------------------------------------------------------------*/
214
215 /* Install the IRQ handler */
216 static void t7l66xb_attach_irq(struct platform_device *dev)
217 {
218         struct t7l66xb *t7l66xb = platform_get_drvdata(dev);
219         unsigned int irq, irq_base;
220
221         irq_base = t7l66xb->irq_base;
222
223         for (irq = irq_base; irq < irq_base + T7L66XB_NR_IRQS; irq++) {
224                 set_irq_chip(irq, &t7l66xb_chip);
225                 set_irq_chip_data(irq, t7l66xb);
226                 set_irq_handler(irq, handle_level_irq);
227 #ifdef CONFIG_ARM
228                 set_irq_flags(irq, IRQF_VALID | IRQF_PROBE);
229 #endif
230         }
231
232         set_irq_type(t7l66xb->irq, IRQ_TYPE_EDGE_FALLING);
233         set_irq_data(t7l66xb->irq, t7l66xb);
234         set_irq_chained_handler(t7l66xb->irq, t7l66xb_irq);
235 }
236
237 static void t7l66xb_detach_irq(struct platform_device *dev)
238 {
239         struct t7l66xb *t7l66xb = platform_get_drvdata(dev);
240         unsigned int irq, irq_base;
241
242         irq_base = t7l66xb->irq_base;
243
244         set_irq_chained_handler(t7l66xb->irq, NULL);
245         set_irq_data(t7l66xb->irq, NULL);
246
247         for (irq = irq_base; irq < irq_base + T7L66XB_NR_IRQS; irq++) {
248 #ifdef CONFIG_ARM
249                 set_irq_flags(irq, 0);
250 #endif
251                 set_irq_chip(irq, NULL);
252                 set_irq_chip_data(irq, NULL);
253         }
254 }
255
256 /*--------------------------------------------------------------------------*/
257
258 #ifdef CONFIG_PM
259 static int t7l66xb_suspend(struct platform_device *dev, pm_message_t state)
260 {
261         struct t7l66xb_platform_data *pdata = dev->dev.platform_data;
262
263         if (pdata && pdata->suspend)
264                 pdata->suspend(dev);
265
266         return 0;
267 }
268
269 static int t7l66xb_resume(struct platform_device *dev)
270 {
271         struct t7l66xb_platform_data *pdata = dev->dev.platform_data;
272
273         if (pdata && pdata->resume)
274                 pdata->resume(dev);
275
276         return 0;
277 }
278 #else
279 #define t7l66xb_suspend NULL
280 #define t7l66xb_resume  NULL
281 #endif
282
283 /*--------------------------------------------------------------------------*/
284
285 static int t7l66xb_probe(struct platform_device *dev)
286 {
287         struct t7l66xb_platform_data *pdata = dev->dev.platform_data;
288         struct t7l66xb *t7l66xb;
289         struct resource *iomem, *rscr;
290         int ret;
291
292         iomem = platform_get_resource(dev, IORESOURCE_MEM, 0);
293         if (!iomem)
294                 return -EINVAL;
295
296         t7l66xb = kzalloc(sizeof *t7l66xb, GFP_KERNEL);
297         if (!t7l66xb)
298                 return -ENOMEM;
299
300         spin_lock_init(&t7l66xb->lock);
301
302         platform_set_drvdata(dev, t7l66xb);
303
304         ret = platform_get_irq(dev, 0);
305         if (ret >= 0)
306                 t7l66xb->irq = ret;
307         else
308                 goto err_noirq;
309
310         t7l66xb->irq_base = pdata->irq_base;
311
312         rscr = &t7l66xb->rscr;
313         rscr->name = "t7l66xb-core";
314         rscr->start = iomem->start;
315         rscr->end = iomem->start + 0xff;
316         rscr->flags = IORESOURCE_MEM;
317
318         ret = request_resource(iomem, rscr);
319         if (ret)
320                 goto err_request_scr;
321
322         t7l66xb->scr = ioremap(rscr->start, rscr->end - rscr->start + 1);
323         if (!t7l66xb->scr) {
324                 ret = -ENOMEM;
325                 goto err_ioremap;
326         }
327
328         if (pdata && pdata->enable)
329                 pdata->enable(dev);
330
331         /* Mask all interrupts */
332         tmio_iowrite8(0xbf, t7l66xb->scr + SCR_IMR);
333
334         printk(KERN_INFO "%s rev %d @ 0x%08lx, irq %d\n",
335                 dev->name, tmio_ioread8(t7l66xb->scr + SCR_REVID),
336                 (unsigned long)iomem->start, t7l66xb->irq);
337
338         t7l66xb_attach_irq(dev);
339
340         t7l66xb_cells[T7L66XB_CELL_NAND].driver_data = pdata->nand_data;
341         t7l66xb_cells[T7L66XB_CELL_NAND].platform_data =
342                 &t7l66xb_cells[T7L66XB_CELL_NAND];
343         t7l66xb_cells[T7L66XB_CELL_NAND].data_size =
344                 sizeof(t7l66xb_cells[T7L66XB_CELL_NAND]);
345
346         t7l66xb_cells[T7L66XB_CELL_MMC].platform_data =
347                 &t7l66xb_cells[T7L66XB_CELL_MMC];
348         t7l66xb_cells[T7L66XB_CELL_MMC].data_size =
349                 sizeof(t7l66xb_cells[T7L66XB_CELL_MMC]);
350
351         ret = mfd_add_devices(&dev->dev, dev->id,
352                               t7l66xb_cells, ARRAY_SIZE(t7l66xb_cells),
353                               iomem, t7l66xb->irq_base);
354
355         if (!ret)
356                 return 0;
357
358         t7l66xb_detach_irq(dev);
359         iounmap(t7l66xb->scr);
360 err_ioremap:
361         release_resource(&t7l66xb->rscr);
362 err_noirq:
363 err_request_scr:
364         kfree(t7l66xb);
365         return ret;
366 }
367
368 static int t7l66xb_remove(struct platform_device *dev)
369 {
370         struct t7l66xb_platform_data *pdata = dev->dev.platform_data;
371         struct t7l66xb *t7l66xb = platform_get_drvdata(dev);
372         int ret;
373
374         ret = pdata->disable(dev);
375
376         t7l66xb_detach_irq(dev);
377         iounmap(t7l66xb->scr);
378         release_resource(&t7l66xb->rscr);
379         mfd_remove_devices(&dev->dev);
380         platform_set_drvdata(dev, NULL);
381         kfree(t7l66xb);
382
383         return ret;
384
385 }
386
387 static struct platform_driver t7l66xb_platform_driver = {
388         .driver = {
389                 .name   = "t7l66xb",
390                 .owner  = THIS_MODULE,
391         },
392         .suspend        = t7l66xb_suspend,
393         .resume         = t7l66xb_resume,
394         .probe          = t7l66xb_probe,
395         .remove         = t7l66xb_remove,
396 };
397
398 /*--------------------------------------------------------------------------*/
399
400 static int __init t7l66xb_init(void)
401 {
402         int retval = 0;
403
404         retval = platform_driver_register(&t7l66xb_platform_driver);
405         return retval;
406 }
407
408 static void __exit t7l66xb_exit(void)
409 {
410         platform_driver_unregister(&t7l66xb_platform_driver);
411 }
412
413 module_init(t7l66xb_init);
414 module_exit(t7l66xb_exit);
415
416 MODULE_DESCRIPTION("Toshiba T7L66XB core driver");
417 MODULE_LICENSE("GPL v2");
418 MODULE_AUTHOR("Ian Molton");
419 MODULE_ALIAS("platform:t7l66xb");