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TOMOYO Linux Cross Reference
Linux/arch/arm/mach-pxa/mainstone.c

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  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 #include <linux/gpio.h>
 16 #include <linux/gpio/machine.h>
 17 #include <linux/init.h>
 18 #include <linux/platform_device.h>
 19 #include <linux/syscore_ops.h>
 20 #include <linux/interrupt.h>
 21 #include <linux/sched.h>
 22 #include <linux/bitops.h>
 23 #include <linux/fb.h>
 24 #include <linux/ioport.h>
 25 #include <linux/mtd/mtd.h>
 26 #include <linux/mtd/partitions.h>
 27 #include <linux/input.h>
 28 #include <linux/gpio_keys.h>
 29 #include <linux/pwm.h>
 30 #include <linux/pwm_backlight.h>
 31 #include <linux/smc91x.h>
 32 #include <linux/i2c/pxa-i2c.h>
 33 #include <linux/slab.h>
 34 #include <linux/leds.h>
 35 
 36 #include <asm/types.h>
 37 #include <asm/setup.h>
 38 #include <asm/memory.h>
 39 #include <asm/mach-types.h>
 40 #include <mach/hardware.h>
 41 #include <asm/irq.h>
 42 #include <asm/sizes.h>
 43 
 44 #include <asm/mach/arch.h>
 45 #include <asm/mach/map.h>
 46 #include <asm/mach/irq.h>
 47 #include <asm/mach/flash.h>
 48 
 49 #include "pxa27x.h"
 50 #include <mach/mainstone.h>
 51 #include <mach/audio.h>
 52 #include <linux/platform_data/video-pxafb.h>
 53 #include <linux/platform_data/mmc-pxamci.h>
 54 #include <linux/platform_data/irda-pxaficp.h>
 55 #include <linux/platform_data/usb-ohci-pxa27x.h>
 56 #include <linux/platform_data/keypad-pxa27x.h>
 57 #include <mach/smemc.h>
 58 
 59 #include "generic.h"
 60 #include "devices.h"
 61 
 62 static unsigned long mainstone_pin_config[] = {
 63         /* Chip Select */
 64         GPIO15_nCS_1,
 65 
 66         /* LCD - 16bpp Active TFT */
 67         GPIOxx_LCD_TFT_16BPP,
 68         GPIO16_PWM0_OUT,        /* Backlight */
 69 
 70         /* MMC */
 71         GPIO32_MMC_CLK,
 72         GPIO112_MMC_CMD,
 73         GPIO92_MMC_DAT_0,
 74         GPIO109_MMC_DAT_1,
 75         GPIO110_MMC_DAT_2,
 76         GPIO111_MMC_DAT_3,
 77 
 78         /* USB Host Port 1 */
 79         GPIO88_USBH1_PWR,
 80         GPIO89_USBH1_PEN,
 81 
 82         /* PC Card */
 83         GPIO48_nPOE,
 84         GPIO49_nPWE,
 85         GPIO50_nPIOR,
 86         GPIO51_nPIOW,
 87         GPIO85_nPCE_1,
 88         GPIO54_nPCE_2,
 89         GPIO79_PSKTSEL,
 90         GPIO55_nPREG,
 91         GPIO56_nPWAIT,
 92         GPIO57_nIOIS16,
 93 
 94         /* AC97 */
 95         GPIO28_AC97_BITCLK,
 96         GPIO29_AC97_SDATA_IN_0,
 97         GPIO30_AC97_SDATA_OUT,
 98         GPIO31_AC97_SYNC,
 99         GPIO45_AC97_SYSCLK,
100 
101         /* Keypad */
102         GPIO93_KP_DKIN_0,
103         GPIO94_KP_DKIN_1,
104         GPIO95_KP_DKIN_2,
105         GPIO100_KP_MKIN_0       | WAKEUP_ON_LEVEL_HIGH,
106         GPIO101_KP_MKIN_1       | WAKEUP_ON_LEVEL_HIGH,
107         GPIO102_KP_MKIN_2       | WAKEUP_ON_LEVEL_HIGH,
108         GPIO97_KP_MKIN_3        | WAKEUP_ON_LEVEL_HIGH,
109         GPIO98_KP_MKIN_4        | WAKEUP_ON_LEVEL_HIGH,
110         GPIO99_KP_MKIN_5        | WAKEUP_ON_LEVEL_HIGH,
111         GPIO103_KP_MKOUT_0,
112         GPIO104_KP_MKOUT_1,
113         GPIO105_KP_MKOUT_2,
114         GPIO106_KP_MKOUT_3,
115         GPIO107_KP_MKOUT_4,
116         GPIO108_KP_MKOUT_5,
117         GPIO96_KP_MKOUT_6,
118 
119         /* I2C */
120         GPIO117_I2C_SCL,
121         GPIO118_I2C_SDA,
122 
123         /* GPIO */
124         GPIO1_GPIO | WAKEUP_ON_EDGE_BOTH,
125 };
126 
127 static struct resource smc91x_resources[] = {
128         [0] = {
129                 .start  = (MST_ETH_PHYS + 0x300),
130                 .end    = (MST_ETH_PHYS + 0xfffff),
131                 .flags  = IORESOURCE_MEM,
132         },
133         [1] = {
134                 .start  = MAINSTONE_IRQ(3),
135                 .end    = MAINSTONE_IRQ(3),
136                 .flags  = IORESOURCE_IRQ | IORESOURCE_IRQ_HIGHEDGE,
137         }
138 };
139 
140 static struct smc91x_platdata mainstone_smc91x_info = {
141         .flags  = SMC91X_USE_8BIT | SMC91X_USE_16BIT | SMC91X_USE_32BIT |
142                   SMC91X_NOWAIT | SMC91X_USE_DMA,
143 };
144 
145 static struct platform_device smc91x_device = {
146         .name           = "smc91x",
147         .id             = 0,
148         .num_resources  = ARRAY_SIZE(smc91x_resources),
149         .resource       = smc91x_resources,
150         .dev            = {
151                 .platform_data = &mainstone_smc91x_info,
152         },
153 };
154 
155 static int mst_audio_startup(struct snd_pcm_substream *substream, void *priv)
156 {
157         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
158                 MST_MSCWR2 &= ~MST_MSCWR2_AC97_SPKROFF;
159         return 0;
160 }
161 
162 static void mst_audio_shutdown(struct snd_pcm_substream *substream, void *priv)
163 {
164         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
165                 MST_MSCWR2 |= MST_MSCWR2_AC97_SPKROFF;
166 }
167 
168 static long mst_audio_suspend_mask;
169 
170 static void mst_audio_suspend(void *priv)
171 {
172         mst_audio_suspend_mask = MST_MSCWR2;
173         MST_MSCWR2 |= MST_MSCWR2_AC97_SPKROFF;
174 }
175 
176 static void mst_audio_resume(void *priv)
177 {
178         MST_MSCWR2 &= mst_audio_suspend_mask | ~MST_MSCWR2_AC97_SPKROFF;
179 }
180 
181 static pxa2xx_audio_ops_t mst_audio_ops = {
182         .startup        = mst_audio_startup,
183         .shutdown       = mst_audio_shutdown,
184         .suspend        = mst_audio_suspend,
185         .resume         = mst_audio_resume,
186 };
187 
188 static struct resource flash_resources[] = {
189         [0] = {
190                 .start  = PXA_CS0_PHYS,
191                 .end    = PXA_CS0_PHYS + SZ_64M - 1,
192                 .flags  = IORESOURCE_MEM,
193         },
194         [1] = {
195                 .start  = PXA_CS1_PHYS,
196                 .end    = PXA_CS1_PHYS + SZ_64M - 1,
197                 .flags  = IORESOURCE_MEM,
198         },
199 };
200 
201 static struct mtd_partition mainstoneflash0_partitions[] = {
202         {
203                 .name =         "Bootloader",
204                 .size =         0x00040000,
205                 .offset =       0,
206                 .mask_flags =   MTD_WRITEABLE  /* force read-only */
207         },{
208                 .name =         "Kernel",
209                 .size =         0x00400000,
210                 .offset =       0x00040000,
211         },{
212                 .name =         "Filesystem",
213                 .size =         MTDPART_SIZ_FULL,
214                 .offset =       0x00440000
215         }
216 };
217 
218 static struct flash_platform_data mst_flash_data[2] = {
219         {
220                 .map_name       = "cfi_probe",
221                 .parts          = mainstoneflash0_partitions,
222                 .nr_parts       = ARRAY_SIZE(mainstoneflash0_partitions),
223         }, {
224                 .map_name       = "cfi_probe",
225                 .parts          = NULL,
226                 .nr_parts       = 0,
227         }
228 };
229 
230 static struct platform_device mst_flash_device[2] = {
231         {
232                 .name           = "pxa2xx-flash",
233                 .id             = 0,
234                 .dev = {
235                         .platform_data = &mst_flash_data[0],
236                 },
237                 .resource = &flash_resources[0],
238                 .num_resources = 1,
239         },
240         {
241                 .name           = "pxa2xx-flash",
242                 .id             = 1,
243                 .dev = {
244                         .platform_data = &mst_flash_data[1],
245                 },
246                 .resource = &flash_resources[1],
247                 .num_resources = 1,
248         },
249 };
250 
251 #if defined(CONFIG_FB_PXA) || defined(CONFIG_FB_PXA_MODULE)
252 static struct pwm_lookup mainstone_pwm_lookup[] = {
253         PWM_LOOKUP("pxa27x-pwm.0", 0, "pwm-backlight.0", NULL, 78770,
254                    PWM_POLARITY_NORMAL),
255 };
256 
257 static struct platform_pwm_backlight_data mainstone_backlight_data = {
258         .max_brightness = 1023,
259         .dft_brightness = 1023,
260         .enable_gpio    = -1,
261 };
262 
263 static struct platform_device mainstone_backlight_device = {
264         .name           = "pwm-backlight",
265         .dev            = {
266                 .parent = &pxa27x_device_pwm0.dev,
267                 .platform_data = &mainstone_backlight_data,
268         },
269 };
270 
271 static void __init mainstone_backlight_register(void)
272 {
273         int ret;
274 
275         pwm_add_table(mainstone_pwm_lookup, ARRAY_SIZE(mainstone_pwm_lookup));
276 
277         ret = platform_device_register(&mainstone_backlight_device);
278         if (ret) {
279                 printk(KERN_ERR "mainstone: failed to register backlight device: %d\n", ret);
280                 pwm_remove_table(mainstone_pwm_lookup,
281                                  ARRAY_SIZE(mainstone_pwm_lookup));
282         }
283 }
284 #else
285 #define mainstone_backlight_register()  do { } while (0)
286 #endif
287 
288 static struct pxafb_mode_info toshiba_ltm04c380k_mode = {
289         .pixclock               = 50000,
290         .xres                   = 640,
291         .yres                   = 480,
292         .bpp                    = 16,
293         .hsync_len              = 1,
294         .left_margin            = 0x9f,
295         .right_margin           = 1,
296         .vsync_len              = 44,
297         .upper_margin           = 0,
298         .lower_margin           = 0,
299         .sync                   = FB_SYNC_HOR_HIGH_ACT|FB_SYNC_VERT_HIGH_ACT,
300 };
301 
302 static struct pxafb_mode_info toshiba_ltm035a776c_mode = {
303         .pixclock               = 110000,
304         .xres                   = 240,
305         .yres                   = 320,
306         .bpp                    = 16,
307         .hsync_len              = 4,
308         .left_margin            = 8,
309         .right_margin           = 20,
310         .vsync_len              = 3,
311         .upper_margin           = 1,
312         .lower_margin           = 10,
313         .sync                   = FB_SYNC_HOR_HIGH_ACT|FB_SYNC_VERT_HIGH_ACT,
314 };
315 
316 static struct pxafb_mach_info mainstone_pxafb_info = {
317         .num_modes              = 1,
318         .lcd_conn               = LCD_COLOR_TFT_16BPP | LCD_PCLK_EDGE_FALL,
319 };
320 
321 static int mainstone_mci_init(struct device *dev, irq_handler_t mstone_detect_int, void *data)
322 {
323         int err;
324 
325         /* make sure SD/Memory Stick multiplexer's signals
326          * are routed to MMC controller
327          */
328         MST_MSCWR1 &= ~MST_MSCWR1_MS_SEL;
329 
330         err = request_irq(MAINSTONE_MMC_IRQ, mstone_detect_int, 0,
331                              "MMC card detect", data);
332         if (err)
333                 printk(KERN_ERR "mainstone_mci_init: MMC/SD: can't request MMC card detect IRQ\n");
334 
335         return err;
336 }
337 
338 static int mainstone_mci_setpower(struct device *dev, unsigned int vdd)
339 {
340         struct pxamci_platform_data* p_d = dev->platform_data;
341 
342         if (( 1 << vdd) & p_d->ocr_mask) {
343                 printk(KERN_DEBUG "%s: on\n", __func__);
344                 MST_MSCWR1 |= MST_MSCWR1_MMC_ON;
345                 MST_MSCWR1 &= ~MST_MSCWR1_MS_SEL;
346         } else {
347                 printk(KERN_DEBUG "%s: off\n", __func__);
348                 MST_MSCWR1 &= ~MST_MSCWR1_MMC_ON;
349         }
350         return 0;
351 }
352 
353 static void mainstone_mci_exit(struct device *dev, void *data)
354 {
355         free_irq(MAINSTONE_MMC_IRQ, data);
356 }
357 
358 static struct pxamci_platform_data mainstone_mci_platform_data = {
359         .ocr_mask               = MMC_VDD_32_33|MMC_VDD_33_34,
360         .init                   = mainstone_mci_init,
361         .setpower               = mainstone_mci_setpower,
362         .exit                   = mainstone_mci_exit,
363         .gpio_card_detect       = -1,
364         .gpio_card_ro           = -1,
365         .gpio_power             = -1,
366 };
367 
368 static void mainstone_irda_transceiver_mode(struct device *dev, int mode)
369 {
370         unsigned long flags;
371 
372         local_irq_save(flags);
373         if (mode & IR_SIRMODE) {
374                 MST_MSCWR1 &= ~MST_MSCWR1_IRDA_FIR;
375         } else if (mode & IR_FIRMODE) {
376                 MST_MSCWR1 |= MST_MSCWR1_IRDA_FIR;
377         }
378         pxa2xx_transceiver_mode(dev, mode);
379         if (mode & IR_OFF) {
380                 MST_MSCWR1 = (MST_MSCWR1 & ~MST_MSCWR1_IRDA_MASK) | MST_MSCWR1_IRDA_OFF;
381         } else {
382                 MST_MSCWR1 = (MST_MSCWR1 & ~MST_MSCWR1_IRDA_MASK) | MST_MSCWR1_IRDA_FULL;
383         }
384         local_irq_restore(flags);
385 }
386 
387 static struct pxaficp_platform_data mainstone_ficp_platform_data = {
388         .gpio_pwdown            = -1,
389         .transceiver_cap        = IR_SIRMODE | IR_FIRMODE | IR_OFF,
390         .transceiver_mode       = mainstone_irda_transceiver_mode,
391 };
392 
393 static struct gpio_keys_button gpio_keys_button[] = {
394         [0] = {
395                 .desc   = "wakeup",
396                 .code   = KEY_SUSPEND,
397                 .type   = EV_KEY,
398                 .gpio   = 1,
399                 .wakeup = 1,
400         },
401 };
402 
403 static struct gpio_keys_platform_data mainstone_gpio_keys = {
404         .buttons        = gpio_keys_button,
405         .nbuttons       = 1,
406 };
407 
408 static struct platform_device mst_gpio_keys_device = {
409         .name           = "gpio-keys",
410         .id             = -1,
411         .dev            = {
412                 .platform_data  = &mainstone_gpio_keys,
413         },
414 };
415 
416 static struct resource mst_cplds_resources[] = {
417         [0] = {
418                 .start  = MST_FPGA_PHYS + 0xc0,
419                 .end    = MST_FPGA_PHYS + 0xe0 - 1,
420                 .flags  = IORESOURCE_MEM,
421         },
422         [1] = {
423                 .start  = PXA_GPIO_TO_IRQ(0),
424                 .end    = PXA_GPIO_TO_IRQ(0),
425                 .flags  = IORESOURCE_IRQ | IORESOURCE_IRQ_LOWEDGE,
426         },
427         [2] = {
428                 .start  = MAINSTONE_IRQ(0),
429                 .end    = MAINSTONE_IRQ(15),
430                 .flags  = IORESOURCE_IRQ,
431         },
432 };
433 
434 static struct platform_device mst_cplds_device = {
435         .name           = "pxa_cplds_irqs",
436         .id             = -1,
437         .resource       = &mst_cplds_resources[0],
438         .num_resources  = 3,
439 };
440 
441 static struct platform_device *platform_devices[] __initdata = {
442         &smc91x_device,
443         &mst_flash_device[0],
444         &mst_flash_device[1],
445         &mst_gpio_keys_device,
446         &mst_cplds_device,
447 };
448 
449 static struct pxaohci_platform_data mainstone_ohci_platform_data = {
450         .port_mode      = PMM_PERPORT_MODE,
451         .flags          = ENABLE_PORT_ALL | POWER_CONTROL_LOW | POWER_SENSE_LOW,
452 };
453 
454 #if defined(CONFIG_KEYBOARD_PXA27x) || defined(CONFIG_KEYBOARD_PXA27x_MODULE)
455 static const unsigned int mainstone_matrix_keys[] = {
456         KEY(0, 0, KEY_A), KEY(1, 0, KEY_B), KEY(2, 0, KEY_C),
457         KEY(3, 0, KEY_D), KEY(4, 0, KEY_E), KEY(5, 0, KEY_F),
458         KEY(0, 1, KEY_G), KEY(1, 1, KEY_H), KEY(2, 1, KEY_I),
459         KEY(3, 1, KEY_J), KEY(4, 1, KEY_K), KEY(5, 1, KEY_L),
460         KEY(0, 2, KEY_M), KEY(1, 2, KEY_N), KEY(2, 2, KEY_O),
461         KEY(3, 2, KEY_P), KEY(4, 2, KEY_Q), KEY(5, 2, KEY_R),
462         KEY(0, 3, KEY_S), KEY(1, 3, KEY_T), KEY(2, 3, KEY_U),
463         KEY(3, 3, KEY_V), KEY(4, 3, KEY_W), KEY(5, 3, KEY_X),
464         KEY(2, 4, KEY_Y), KEY(3, 4, KEY_Z),
465 
466         KEY(0, 4, KEY_DOT),     /* . */
467         KEY(1, 4, KEY_CLOSE),   /* @ */
468         KEY(4, 4, KEY_SLASH),
469         KEY(5, 4, KEY_BACKSLASH),
470         KEY(0, 5, KEY_HOME),
471         KEY(1, 5, KEY_LEFTSHIFT),
472         KEY(2, 5, KEY_SPACE),
473         KEY(3, 5, KEY_SPACE),
474         KEY(4, 5, KEY_ENTER),
475         KEY(5, 5, KEY_BACKSPACE),
476 
477         KEY(0, 6, KEY_UP),
478         KEY(1, 6, KEY_DOWN),
479         KEY(2, 6, KEY_LEFT),
480         KEY(3, 6, KEY_RIGHT),
481         KEY(4, 6, KEY_SELECT),
482 };
483 
484 static struct matrix_keymap_data mainstone_matrix_keymap_data = {
485         .keymap                 = mainstone_matrix_keys,
486         .keymap_size            = ARRAY_SIZE(mainstone_matrix_keys),
487 };
488 
489 struct pxa27x_keypad_platform_data mainstone_keypad_info = {
490         .matrix_key_rows        = 6,
491         .matrix_key_cols        = 7,
492         .matrix_keymap_data     = &mainstone_matrix_keymap_data,
493 
494         .enable_rotary0         = 1,
495         .rotary0_up_key         = KEY_UP,
496         .rotary0_down_key       = KEY_DOWN,
497 
498         .debounce_interval      = 30,
499 };
500 
501 static void __init mainstone_init_keypad(void)
502 {
503         pxa_set_keypad_info(&mainstone_keypad_info);
504 }
505 #else
506 static inline void mainstone_init_keypad(void) {}
507 #endif
508 
509 static void __init mainstone_init(void)
510 {
511         int SW7 = 0;  /* FIXME: get from SCR (Mst doc section 3.2.1.1) */
512 
513         pxa2xx_mfp_config(ARRAY_AND_SIZE(mainstone_pin_config));
514 
515         pxa_set_ffuart_info(NULL);
516         pxa_set_btuart_info(NULL);
517         pxa_set_stuart_info(NULL);
518 
519         mst_flash_data[0].width = (__raw_readl(BOOT_DEF) & 1) ? 2 : 4;
520         mst_flash_data[1].width = 4;
521 
522         /* Compensate for SW7 which swaps the flash banks */
523         mst_flash_data[SW7].name = "processor-flash";
524         mst_flash_data[SW7 ^ 1].name = "mainboard-flash";
525 
526         printk(KERN_NOTICE "Mainstone configured to boot from %s\n",
527                mst_flash_data[0].name);
528 
529         /* system bus arbiter setting
530          * - Core_Park
531          * - LCD_wt:DMA_wt:CORE_Wt = 2:3:4
532          */
533         ARB_CNTRL = ARB_CORE_PARK | 0x234;
534 
535         platform_add_devices(platform_devices, ARRAY_SIZE(platform_devices));
536 
537         /* reading Mainstone's "Virtual Configuration Register"
538            might be handy to select LCD type here */
539         if (0)
540                 mainstone_pxafb_info.modes = &toshiba_ltm04c380k_mode;
541         else
542                 mainstone_pxafb_info.modes = &toshiba_ltm035a776c_mode;
543 
544         pxa_set_fb_info(NULL, &mainstone_pxafb_info);
545         mainstone_backlight_register();
546 
547         pxa_set_mci_info(&mainstone_mci_platform_data);
548         pxa_set_ficp_info(&mainstone_ficp_platform_data);
549         pxa_set_ohci_info(&mainstone_ohci_platform_data);
550         pxa_set_i2c_info(NULL);
551         pxa_set_ac97_info(&mst_audio_ops);
552 
553         mainstone_init_keypad();
554 }
555 
556 
557 static struct map_desc mainstone_io_desc[] __initdata = {
558         {       /* CPLD */
559                 .virtual        =  MST_FPGA_VIRT,
560                 .pfn            = __phys_to_pfn(MST_FPGA_PHYS),
561                 .length         = 0x00100000,
562                 .type           = MT_DEVICE
563         }
564 };
565 
566 static void __init mainstone_map_io(void)
567 {
568         pxa27x_map_io();
569         iotable_init(mainstone_io_desc, ARRAY_SIZE(mainstone_io_desc));
570 
571         /*      for use I SRAM as framebuffer.  */
572         PSLR |= 0xF04;
573         PCFR = 0x66;
574 }
575 
576 /*
577  * Driver for the 8 discrete LEDs available for general use:
578  * Note: bits [15-8] are used to enable/blank the 8 7 segment hex displays
579  * so be sure to not monkey with them here.
580  */
581 
582 #if defined(CONFIG_NEW_LEDS) && defined(CONFIG_LEDS_CLASS)
583 struct mainstone_led {
584         struct led_classdev     cdev;
585         u8                      mask;
586 };
587 
588 /*
589  * The triggers lines up below will only be used if the
590  * LED triggers are compiled in.
591  */
592 static const struct {
593         const char *name;
594         const char *trigger;
595 } mainstone_leds[] = {
596         { "mainstone:D28", "default-on", },
597         { "mainstone:D27", "cpu0", },
598         { "mainstone:D26", "heartbeat" },
599         { "mainstone:D25", },
600         { "mainstone:D24", },
601         { "mainstone:D23", },
602         { "mainstone:D22", },
603         { "mainstone:D21", },
604 };
605 
606 static void mainstone_led_set(struct led_classdev *cdev,
607                               enum led_brightness b)
608 {
609         struct mainstone_led *led = container_of(cdev,
610                                          struct mainstone_led, cdev);
611         u32 reg = MST_LEDCTRL;
612 
613         if (b != LED_OFF)
614                 reg |= led->mask;
615         else
616                 reg &= ~led->mask;
617 
618         MST_LEDCTRL = reg;
619 }
620 
621 static enum led_brightness mainstone_led_get(struct led_classdev *cdev)
622 {
623         struct mainstone_led *led = container_of(cdev,
624                                          struct mainstone_led, cdev);
625         u32 reg = MST_LEDCTRL;
626 
627         return (reg & led->mask) ? LED_FULL : LED_OFF;
628 }
629 
630 static int __init mainstone_leds_init(void)
631 {
632         int i;
633 
634         if (!machine_is_mainstone())
635                 return -ENODEV;
636 
637         /* All ON */
638         MST_LEDCTRL |= 0xff;
639         for (i = 0; i < ARRAY_SIZE(mainstone_leds); i++) {
640                 struct mainstone_led *led;
641 
642                 led = kzalloc(sizeof(*led), GFP_KERNEL);
643                 if (!led)
644                         break;
645 
646                 led->cdev.name = mainstone_leds[i].name;
647                 led->cdev.brightness_set = mainstone_led_set;
648                 led->cdev.brightness_get = mainstone_led_get;
649                 led->cdev.default_trigger = mainstone_leds[i].trigger;
650                 led->mask = BIT(i);
651 
652                 if (led_classdev_register(NULL, &led->cdev) < 0) {
653                         kfree(led);
654                         break;
655                 }
656         }
657 
658         return 0;
659 }
660 
661 /*
662  * Since we may have triggers on any subsystem, defer registration
663  * until after subsystem_init.
664  */
665 fs_initcall(mainstone_leds_init);
666 #endif
667 
668 MACHINE_START(MAINSTONE, "Intel HCDDBBVA0 Development Platform (aka Mainstone)")
669         /* Maintainer: MontaVista Software Inc. */
670         .atag_offset    = 0x100,        /* BLOB boot parameter setting */
671         .map_io         = mainstone_map_io,
672         .nr_irqs        = MAINSTONE_NR_IRQS,
673         .init_irq       = pxa27x_init_irq,
674         .handle_irq     = pxa27x_handle_irq,
675         .init_time      = pxa_timer_init,
676         .init_machine   = mainstone_init,
677         .restart        = pxa_restart,
678 MACHINE_END
679 

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