[ARM] pxa: mainstone: update backlight to use the backlight infrastructure
[pandora-kernel.git] / arch / arm / mach-pxa / mainstone.c
1 /*
2  *  linux/arch/arm/mach-pxa/mainstone.c
3  *
4  *  Support for the Intel HCDDBBVA0 Development Platform.
5  *  (go figure how they came up with such name...)
6  *
7  *  Author:     Nicolas Pitre
8  *  Created:    Nov 05, 2002
9  *  Copyright:  MontaVista Software Inc.
10  *
11  *  This program is free software; you can redistribute it and/or modify
12  *  it under the terms of the GNU General Public License version 2 as
13  *  published by the Free Software Foundation.
14  */
15
16 #include <linux/init.h>
17 #include <linux/platform_device.h>
18 #include <linux/sysdev.h>
19 #include <linux/interrupt.h>
20 #include <linux/sched.h>
21 #include <linux/bitops.h>
22 #include <linux/fb.h>
23 #include <linux/ioport.h>
24 #include <linux/mtd/mtd.h>
25 #include <linux/mtd/partitions.h>
26 #include <linux/backlight.h>
27
28 #include <asm/types.h>
29 #include <asm/setup.h>
30 #include <asm/memory.h>
31 #include <asm/mach-types.h>
32 #include <asm/hardware.h>
33 #include <asm/irq.h>
34 #include <asm/sizes.h>
35
36 #include <asm/mach/arch.h>
37 #include <asm/mach/map.h>
38 #include <asm/mach/irq.h>
39 #include <asm/mach/flash.h>
40
41 #include <asm/arch/pxa-regs.h>
42 #include <asm/arch/mainstone.h>
43 #include <asm/arch/audio.h>
44 #include <asm/arch/pxafb.h>
45 #include <asm/arch/mmc.h>
46 #include <asm/arch/irda.h>
47 #include <asm/arch/ohci.h>
48
49 #include "generic.h"
50 #include "devices.h"
51
52
53 static unsigned long mainstone_irq_enabled;
54
55 static void mainstone_mask_irq(unsigned int irq)
56 {
57         int mainstone_irq = (irq - MAINSTONE_IRQ(0));
58         MST_INTMSKENA = (mainstone_irq_enabled &= ~(1 << mainstone_irq));
59 }
60
61 static void mainstone_unmask_irq(unsigned int irq)
62 {
63         int mainstone_irq = (irq - MAINSTONE_IRQ(0));
64         /* the irq can be acknowledged only if deasserted, so it's done here */
65         MST_INTSETCLR &= ~(1 << mainstone_irq);
66         MST_INTMSKENA = (mainstone_irq_enabled |= (1 << mainstone_irq));
67 }
68
69 static struct irq_chip mainstone_irq_chip = {
70         .name           = "FPGA",
71         .ack            = mainstone_mask_irq,
72         .mask           = mainstone_mask_irq,
73         .unmask         = mainstone_unmask_irq,
74 };
75
76 static void mainstone_irq_handler(unsigned int irq, struct irq_desc *desc)
77 {
78         unsigned long pending = MST_INTSETCLR & mainstone_irq_enabled;
79         do {
80                 GEDR(0) = GPIO_bit(0);  /* clear useless edge notification */
81                 if (likely(pending)) {
82                         irq = MAINSTONE_IRQ(0) + __ffs(pending);
83                         desc = irq_desc + irq;
84                         desc_handle_irq(irq, desc);
85                 }
86                 pending = MST_INTSETCLR & mainstone_irq_enabled;
87         } while (pending);
88 }
89
90 static void __init mainstone_init_irq(void)
91 {
92         int irq;
93
94         pxa27x_init_irq();
95
96         /* setup extra Mainstone irqs */
97         for(irq = MAINSTONE_IRQ(0); irq <= MAINSTONE_IRQ(15); irq++) {
98                 set_irq_chip(irq, &mainstone_irq_chip);
99                 set_irq_handler(irq, handle_level_irq);
100                 if (irq == MAINSTONE_IRQ(10) || irq == MAINSTONE_IRQ(14))
101                         set_irq_flags(irq, IRQF_VALID | IRQF_PROBE | IRQF_NOAUTOEN);
102                 else
103                         set_irq_flags(irq, IRQF_VALID | IRQF_PROBE);
104         }
105         set_irq_flags(MAINSTONE_IRQ(8), 0);
106         set_irq_flags(MAINSTONE_IRQ(12), 0);
107
108         MST_INTMSKENA = 0;
109         MST_INTSETCLR = 0;
110
111         set_irq_chained_handler(IRQ_GPIO(0), mainstone_irq_handler);
112         set_irq_type(IRQ_GPIO(0), IRQT_FALLING);
113 }
114
115 #ifdef CONFIG_PM
116
117 static int mainstone_irq_resume(struct sys_device *dev)
118 {
119         MST_INTMSKENA = mainstone_irq_enabled;
120         return 0;
121 }
122
123 static struct sysdev_class mainstone_irq_sysclass = {
124         .name = "cpld_irq",
125         .resume = mainstone_irq_resume,
126 };
127
128 static struct sys_device mainstone_irq_device = {
129         .cls = &mainstone_irq_sysclass,
130 };
131
132 static int __init mainstone_irq_device_init(void)
133 {
134         int ret = sysdev_class_register(&mainstone_irq_sysclass);
135         if (ret == 0)
136                 ret = sysdev_register(&mainstone_irq_device);
137         return ret;
138 }
139
140 device_initcall(mainstone_irq_device_init);
141
142 #endif
143
144
145 static struct resource smc91x_resources[] = {
146         [0] = {
147                 .start  = (MST_ETH_PHYS + 0x300),
148                 .end    = (MST_ETH_PHYS + 0xfffff),
149                 .flags  = IORESOURCE_MEM,
150         },
151         [1] = {
152                 .start  = MAINSTONE_IRQ(3),
153                 .end    = MAINSTONE_IRQ(3),
154                 .flags  = IORESOURCE_IRQ,
155         }
156 };
157
158 static struct platform_device smc91x_device = {
159         .name           = "smc91x",
160         .id             = 0,
161         .num_resources  = ARRAY_SIZE(smc91x_resources),
162         .resource       = smc91x_resources,
163 };
164
165 static int mst_audio_startup(struct snd_pcm_substream *substream, void *priv)
166 {
167         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
168                 MST_MSCWR2 &= ~MST_MSCWR2_AC97_SPKROFF;
169         return 0;
170 }
171
172 static void mst_audio_shutdown(struct snd_pcm_substream *substream, void *priv)
173 {
174         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
175                 MST_MSCWR2 |= MST_MSCWR2_AC97_SPKROFF;
176 }
177
178 static long mst_audio_suspend_mask;
179
180 static void mst_audio_suspend(void *priv)
181 {
182         mst_audio_suspend_mask = MST_MSCWR2;
183         MST_MSCWR2 |= MST_MSCWR2_AC97_SPKROFF;
184 }
185
186 static void mst_audio_resume(void *priv)
187 {
188         MST_MSCWR2 &= mst_audio_suspend_mask | ~MST_MSCWR2_AC97_SPKROFF;
189 }
190
191 static pxa2xx_audio_ops_t mst_audio_ops = {
192         .startup        = mst_audio_startup,
193         .shutdown       = mst_audio_shutdown,
194         .suspend        = mst_audio_suspend,
195         .resume         = mst_audio_resume,
196 };
197
198 static struct platform_device mst_audio_device = {
199         .name           = "pxa2xx-ac97",
200         .id             = -1,
201         .dev            = { .platform_data = &mst_audio_ops },
202 };
203
204 static struct resource flash_resources[] = {
205         [0] = {
206                 .start  = PXA_CS0_PHYS,
207                 .end    = PXA_CS0_PHYS + SZ_64M - 1,
208                 .flags  = IORESOURCE_MEM,
209         },
210         [1] = {
211                 .start  = PXA_CS1_PHYS,
212                 .end    = PXA_CS1_PHYS + SZ_64M - 1,
213                 .flags  = IORESOURCE_MEM,
214         },
215 };
216
217 static struct mtd_partition mainstoneflash0_partitions[] = {
218         {
219                 .name =         "Bootloader",
220                 .size =         0x00040000,
221                 .offset =       0,
222                 .mask_flags =   MTD_WRITEABLE  /* force read-only */
223         },{
224                 .name =         "Kernel",
225                 .size =         0x00400000,
226                 .offset =       0x00040000,
227         },{
228                 .name =         "Filesystem",
229                 .size =         MTDPART_SIZ_FULL,
230                 .offset =       0x00440000
231         }
232 };
233
234 static struct flash_platform_data mst_flash_data[2] = {
235         {
236                 .map_name       = "cfi_probe",
237                 .parts          = mainstoneflash0_partitions,
238                 .nr_parts       = ARRAY_SIZE(mainstoneflash0_partitions),
239         }, {
240                 .map_name       = "cfi_probe",
241                 .parts          = NULL,
242                 .nr_parts       = 0,
243         }
244 };
245
246 static struct platform_device mst_flash_device[2] = {
247         {
248                 .name           = "pxa2xx-flash",
249                 .id             = 0,
250                 .dev = {
251                         .platform_data = &mst_flash_data[0],
252                 },
253                 .resource = &flash_resources[0],
254                 .num_resources = 1,
255         },
256         {
257                 .name           = "pxa2xx-flash",
258                 .id             = 1,
259                 .dev = {
260                         .platform_data = &mst_flash_data[1],
261                 },
262                 .resource = &flash_resources[1],
263                 .num_resources = 1,
264         },
265 };
266
267 #ifdef CONFIG_BACKLIGHT_CLASS_DEVICE
268 static int mainstone_backlight_update_status(struct backlight_device *bl)
269 {
270         int brightness = bl->props.brightness;
271
272         if (bl->props.power != FB_BLANK_UNBLANK ||
273             bl->props.fb_blank != FB_BLANK_UNBLANK)
274                 brightness = 0;
275
276         if (brightness != 0) {
277                 pxa_gpio_mode(GPIO16_PWM0_MD);
278                 pxa_set_cken(CKEN_PWM0, 1);
279         }
280         PWM_CTRL0 = 0;
281         PWM_PWDUTY0 = brightness;
282         PWM_PERVAL0 = bl->props.max_brightness;
283         if (brightness == 0)
284                 pxa_set_cken(CKEN_PWM0, 0);
285         return 0; /* pointless return value */
286 }
287
288 static int mainstone_backlight_get_brightness(struct backlight_device *bl)
289 {
290         return PWM_PWDUTY0;
291 }
292
293 static /*const*/ struct backlight_ops mainstone_backlight_ops = {
294         .update_status  = mainstone_backlight_update_status,
295         .get_brightness = mainstone_backlight_get_brightness,
296 };
297
298 static void __init mainstone_backlight_register(void)
299 {
300         struct backlight_device *bl;
301
302         bl = backlight_device_register("mainstone-bl", &pxa_device_fb.dev,
303                                        NULL, &mainstone_backlight_ops);
304         if (IS_ERR(bl)) {
305                 printk(KERN_ERR "mainstone: unable to register backlight: %ld\n",
306                        PTR_ERR(bl));
307                 return;
308         }
309
310         /*
311          * broken design - register-then-setup interfaces are
312          * utterly broken by definition.
313          */
314         bl->props.max_brightness = 1023;
315         bl->props.brightness = 1023;
316         backlight_update_status(bl);
317 }
318 #else
319 #define mainstone_backlight_register()  do { } while (0)
320 #endif
321
322 static struct pxafb_mode_info toshiba_ltm04c380k_mode = {
323         .pixclock               = 50000,
324         .xres                   = 640,
325         .yres                   = 480,
326         .bpp                    = 16,
327         .hsync_len              = 1,
328         .left_margin            = 0x9f,
329         .right_margin           = 1,
330         .vsync_len              = 44,
331         .upper_margin           = 0,
332         .lower_margin           = 0,
333         .sync                   = FB_SYNC_HOR_HIGH_ACT|FB_SYNC_VERT_HIGH_ACT,
334 };
335
336 static struct pxafb_mode_info toshiba_ltm035a776c_mode = {
337         .pixclock               = 110000,
338         .xres                   = 240,
339         .yres                   = 320,
340         .bpp                    = 16,
341         .hsync_len              = 4,
342         .left_margin            = 8,
343         .right_margin           = 20,
344         .vsync_len              = 3,
345         .upper_margin           = 1,
346         .lower_margin           = 10,
347         .sync                   = FB_SYNC_HOR_HIGH_ACT|FB_SYNC_VERT_HIGH_ACT,
348 };
349
350 static struct pxafb_mach_info mainstone_pxafb_info = {
351         .num_modes              = 1,
352         .lccr0                  = LCCR0_Act,
353         .lccr3                  = LCCR3_PCP,
354 };
355
356 static int mainstone_mci_init(struct device *dev, irq_handler_t mstone_detect_int, void *data)
357 {
358         int err;
359
360         /*
361          * setup GPIO for PXA27x MMC controller
362          */
363         pxa_gpio_mode(GPIO32_MMCCLK_MD);
364         pxa_gpio_mode(GPIO112_MMCCMD_MD);
365         pxa_gpio_mode(GPIO92_MMCDAT0_MD);
366         pxa_gpio_mode(GPIO109_MMCDAT1_MD);
367         pxa_gpio_mode(GPIO110_MMCDAT2_MD);
368         pxa_gpio_mode(GPIO111_MMCDAT3_MD);
369
370         /* make sure SD/Memory Stick multiplexer's signals
371          * are routed to MMC controller
372          */
373         MST_MSCWR1 &= ~MST_MSCWR1_MS_SEL;
374
375         err = request_irq(MAINSTONE_MMC_IRQ, mstone_detect_int, IRQF_DISABLED,
376                              "MMC card detect", data);
377         if (err) {
378                 printk(KERN_ERR "mainstone_mci_init: MMC/SD: can't request MMC card detect IRQ\n");
379                 return -1;
380         }
381
382         return 0;
383 }
384
385 static void mainstone_mci_setpower(struct device *dev, unsigned int vdd)
386 {
387         struct pxamci_platform_data* p_d = dev->platform_data;
388
389         if (( 1 << vdd) & p_d->ocr_mask) {
390                 printk(KERN_DEBUG "%s: on\n", __FUNCTION__);
391                 MST_MSCWR1 |= MST_MSCWR1_MMC_ON;
392                 MST_MSCWR1 &= ~MST_MSCWR1_MS_SEL;
393         } else {
394                 printk(KERN_DEBUG "%s: off\n", __FUNCTION__);
395                 MST_MSCWR1 &= ~MST_MSCWR1_MMC_ON;
396         }
397 }
398
399 static void mainstone_mci_exit(struct device *dev, void *data)
400 {
401         free_irq(MAINSTONE_MMC_IRQ, data);
402 }
403
404 static struct pxamci_platform_data mainstone_mci_platform_data = {
405         .ocr_mask       = MMC_VDD_32_33|MMC_VDD_33_34,
406         .init           = mainstone_mci_init,
407         .setpower       = mainstone_mci_setpower,
408         .exit           = mainstone_mci_exit,
409 };
410
411 static void mainstone_irda_transceiver_mode(struct device *dev, int mode)
412 {
413         unsigned long flags;
414
415         local_irq_save(flags);
416         if (mode & IR_SIRMODE) {
417                 MST_MSCWR1 &= ~MST_MSCWR1_IRDA_FIR;
418         } else if (mode & IR_FIRMODE) {
419                 MST_MSCWR1 |= MST_MSCWR1_IRDA_FIR;
420         }
421         if (mode & IR_OFF) {
422                 MST_MSCWR1 = (MST_MSCWR1 & ~MST_MSCWR1_IRDA_MASK) | MST_MSCWR1_IRDA_OFF;
423         } else {
424                 MST_MSCWR1 = (MST_MSCWR1 & ~MST_MSCWR1_IRDA_MASK) | MST_MSCWR1_IRDA_FULL;
425         }
426         local_irq_restore(flags);
427 }
428
429 static struct pxaficp_platform_data mainstone_ficp_platform_data = {
430         .transceiver_cap  = IR_SIRMODE | IR_FIRMODE | IR_OFF,
431         .transceiver_mode = mainstone_irda_transceiver_mode,
432 };
433
434 static struct platform_device *platform_devices[] __initdata = {
435         &smc91x_device,
436         &mst_audio_device,
437         &mst_flash_device[0],
438         &mst_flash_device[1],
439 };
440
441 static int mainstone_ohci_init(struct device *dev)
442 {
443         /* setup Port1 GPIO pin. */
444         pxa_gpio_mode( 88 | GPIO_ALT_FN_1_IN);  /* USBHPWR1 */
445         pxa_gpio_mode( 89 | GPIO_ALT_FN_2_OUT); /* USBHPEN1 */
446
447         /* Set the Power Control Polarity Low and Power Sense
448            Polarity Low to active low. */
449         UHCHR = (UHCHR | UHCHR_PCPL | UHCHR_PSPL) &
450                 ~(UHCHR_SSEP1 | UHCHR_SSEP2 | UHCHR_SSEP3 | UHCHR_SSE);
451
452         return 0;
453 }
454
455 static struct pxaohci_platform_data mainstone_ohci_platform_data = {
456         .port_mode      = PMM_PERPORT_MODE,
457         .init           = mainstone_ohci_init,
458 };
459
460 static void __init mainstone_init(void)
461 {
462         int SW7 = 0;  /* FIXME: get from SCR (Mst doc section 3.2.1.1) */
463
464         mst_flash_data[0].width = (BOOT_DEF & 1) ? 2 : 4;
465         mst_flash_data[1].width = 4;
466
467         /* Compensate for SW7 which swaps the flash banks */
468         mst_flash_data[SW7].name = "processor-flash";
469         mst_flash_data[SW7 ^ 1].name = "mainboard-flash";
470
471         printk(KERN_NOTICE "Mainstone configured to boot from %s\n",
472                mst_flash_data[0].name);
473
474         /* system bus arbiter setting
475          * - Core_Park
476          * - LCD_wt:DMA_wt:CORE_Wt = 2:3:4
477          */
478         ARB_CNTRL = ARB_CORE_PARK | 0x234;
479
480         /*
481          * On Mainstone, we route AC97_SYSCLK via GPIO45 to
482          * the audio daughter card
483          */
484         pxa_gpio_mode(GPIO45_SYSCLK_AC97_MD);
485
486         GPSR(GPIO48_nPOE) =
487                 GPIO_bit(GPIO48_nPOE) |
488                 GPIO_bit(GPIO49_nPWE) |
489                 GPIO_bit(GPIO50_nPIOR) |
490                 GPIO_bit(GPIO51_nPIOW) |
491                 GPIO_bit(GPIO85_nPCE_1) |
492                 GPIO_bit(GPIO54_nPCE_2);
493
494         pxa_gpio_mode(GPIO48_nPOE_MD);
495         pxa_gpio_mode(GPIO49_nPWE_MD);
496         pxa_gpio_mode(GPIO50_nPIOR_MD);
497         pxa_gpio_mode(GPIO51_nPIOW_MD);
498         pxa_gpio_mode(GPIO85_nPCE_1_MD);
499         pxa_gpio_mode(GPIO54_nPCE_2_MD);
500         pxa_gpio_mode(GPIO79_pSKTSEL_MD);
501         pxa_gpio_mode(GPIO55_nPREG_MD);
502         pxa_gpio_mode(GPIO56_nPWAIT_MD);
503         pxa_gpio_mode(GPIO57_nIOIS16_MD);
504
505         platform_add_devices(platform_devices, ARRAY_SIZE(platform_devices));
506
507         /* reading Mainstone's "Virtual Configuration Register"
508            might be handy to select LCD type here */
509         if (0)
510                 mainstone_pxafb_info.modes = &toshiba_ltm04c380k_mode;
511         else
512                 mainstone_pxafb_info.modes = &toshiba_ltm035a776c_mode;
513
514         set_pxa_fb_info(&mainstone_pxafb_info);
515         mainstone_backlight_register();
516
517         pxa_set_mci_info(&mainstone_mci_platform_data);
518         pxa_set_ficp_info(&mainstone_ficp_platform_data);
519         pxa_set_ohci_info(&mainstone_ohci_platform_data);
520 }
521
522
523 static struct map_desc mainstone_io_desc[] __initdata = {
524         {       /* CPLD */
525                 .virtual        =  MST_FPGA_VIRT,
526                 .pfn            = __phys_to_pfn(MST_FPGA_PHYS),
527                 .length         = 0x00100000,
528                 .type           = MT_DEVICE
529         }
530 };
531
532 static void __init mainstone_map_io(void)
533 {
534         pxa_map_io();
535         iotable_init(mainstone_io_desc, ARRAY_SIZE(mainstone_io_desc));
536
537         /* initialize sleep mode regs (wake-up sources, etc) */
538         PGSR0 = 0x00008800;
539         PGSR1 = 0x00000002;
540         PGSR2 = 0x0001FC00;
541         PGSR3 = 0x00001F81;
542         PWER  = 0xC0000002;
543         PRER  = 0x00000002;
544         PFER  = 0x00000002;
545         /*      for use I SRAM as framebuffer.  */
546         PSLR |= 0xF04;
547         PCFR = 0x66;
548         /*      For Keypad wakeup.      */
549         KPC &=~KPC_ASACT;
550         KPC |=KPC_AS;
551         PKWR  = 0x000FD000;
552         /*      Need read PKWR back after set it.       */
553         PKWR;
554 }
555
556 MACHINE_START(MAINSTONE, "Intel HCDDBBVA0 Development Platform (aka Mainstone)")
557         /* Maintainer: MontaVista Software Inc. */
558         .phys_io        = 0x40000000,
559         .boot_params    = 0xa0000100,   /* BLOB boot parameter setting */
560         .io_pg_offst    = (io_p2v(0x40000000) >> 18) & 0xfffc,
561         .map_io         = mainstone_map_io,
562         .init_irq       = mainstone_init_irq,
563         .timer          = &pxa_timer,
564         .init_machine   = mainstone_init,
565 MACHINE_END