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

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  1 /*
  2  *  linux/arch/arm/mach-pxa/lubbock.c
  3  *
  4  *  Support for the Intel DBPXA250 Development Platform.
  5  *
  6  *  Author:     Nicolas Pitre
  7  *  Created:    Jun 15, 2001
  8  *  Copyright:  MontaVista Software Inc.
  9  *
 10  *  This program is free software; you can redistribute it and/or modify
 11  *  it under the terms of the GNU General Public License version 2 as
 12  *  published by the Free Software Foundation.
 13  */
 14 #include <linux/clkdev.h>
 15 #include <linux/gpio.h>
 16 #include <linux/gpio/gpio-reg.h>
 17 #include <linux/gpio/machine.h>
 18 #include <linux/module.h>
 19 #include <linux/kernel.h>
 20 #include <linux/init.h>
 21 #include <linux/io.h>
 22 #include <linux/platform_device.h>
 23 #include <linux/syscore_ops.h>
 24 #include <linux/major.h>
 25 #include <linux/fb.h>
 26 #include <linux/interrupt.h>
 27 #include <linux/mtd/mtd.h>
 28 #include <linux/mtd/partitions.h>
 29 #include <linux/smc91x.h>
 30 #include <linux/slab.h>
 31 #include <linux/leds.h>
 32 
 33 #include <linux/spi/spi.h>
 34 #include <linux/spi/ads7846.h>
 35 #include <linux/spi/pxa2xx_spi.h>
 36 
 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 <asm/hardware/sa1111.h>
 50 
 51 #include "pxa25x.h"
 52 #include <mach/audio.h>
 53 #include <mach/lubbock.h>
 54 #include "udc.h"
 55 #include <linux/platform_data/irda-pxaficp.h>
 56 #include <linux/platform_data/video-pxafb.h>
 57 #include <linux/platform_data/mmc-pxamci.h>
 58 #include "pm.h"
 59 #include <mach/smemc.h>
 60 
 61 #include "generic.h"
 62 #include "devices.h"
 63 
 64 static unsigned long lubbock_pin_config[] __initdata = {
 65         GPIO15_nCS_1,   /* CS1 - Flash */
 66         GPIO78_nCS_2,   /* CS2 - Baseboard FGPA */
 67         GPIO79_nCS_3,   /* CS3 - SMC ethernet */
 68         GPIO80_nCS_4,   /* CS4 - SA1111 */
 69 
 70         /* SSP data pins */
 71         GPIO23_SSP1_SCLK,
 72         GPIO25_SSP1_TXD,
 73         GPIO26_SSP1_RXD,
 74 
 75         /* AC97 */
 76         GPIO28_AC97_BITCLK,
 77         GPIO29_AC97_SDATA_IN_0,
 78         GPIO30_AC97_SDATA_OUT,
 79         GPIO31_AC97_SYNC,
 80 
 81         /* LCD - 16bpp DSTN */
 82         GPIOxx_LCD_DSTN_16BPP,
 83 
 84         /* BTUART */
 85         GPIO42_BTUART_RXD,
 86         GPIO43_BTUART_TXD,
 87         GPIO44_BTUART_CTS,
 88         GPIO45_BTUART_RTS,
 89 
 90         /* PC Card */
 91         GPIO48_nPOE,
 92         GPIO49_nPWE,
 93         GPIO50_nPIOR,
 94         GPIO51_nPIOW,
 95         GPIO52_nPCE_1,
 96         GPIO53_nPCE_2,
 97         GPIO54_nPSKTSEL,
 98         GPIO55_nPREG,
 99         GPIO56_nPWAIT,
100         GPIO57_nIOIS16,
101 
102         /* MMC */
103         GPIO6_MMC_CLK,
104         GPIO8_MMC_CS0,
105 
106         /* SA1111 chip */
107         GPIO11_3_6MHz,
108 
109         /* wakeup */
110         GPIO1_GPIO | WAKEUP_ON_EDGE_RISE,
111 };
112 
113 #define LUB_HEXLED              __LUB_REG(LUBBOCK_FPGA_PHYS + 0x010)
114 
115 void lubbock_set_hexled(uint32_t value)
116 {
117         LUB_HEXLED = value;
118 }
119 
120 static struct gpio_chip *lubbock_misc_wr_gc;
121 
122 void lubbock_set_misc_wr(unsigned int mask, unsigned int set)
123 {
124         unsigned long m = mask, v = set;
125         lubbock_misc_wr_gc->set_multiple(lubbock_misc_wr_gc, &m, &v);
126 }
127 EXPORT_SYMBOL(lubbock_set_misc_wr);
128 
129 static int lubbock_udc_is_connected(void)
130 {
131         return (LUB_MISC_RD & (1 << 9)) == 0;
132 }
133 
134 static struct pxa2xx_udc_mach_info udc_info __initdata = {
135         .udc_is_connected       = lubbock_udc_is_connected,
136         // no D+ pullup; lubbock can't connect/disconnect in software
137 };
138 
139 /* GPIOs for SA1111 PCMCIA */
140 static struct gpiod_lookup_table sa1111_pcmcia_gpio_table = {
141         .dev_id = "1800",
142         .table = {
143                 { "sa1111", 0, "a0vpp", GPIO_ACTIVE_HIGH },
144                 { "sa1111", 1, "a1vpp", GPIO_ACTIVE_HIGH },
145                 { "sa1111", 2, "a0vcc", GPIO_ACTIVE_HIGH },
146                 { "sa1111", 3, "a1vcc", GPIO_ACTIVE_HIGH },
147                 { "lubbock", 14, "b0vcc", GPIO_ACTIVE_HIGH },
148                 { "lubbock", 15, "b1vcc", GPIO_ACTIVE_HIGH },
149                 { },
150         },
151 };
152 
153 static void lubbock_init_pcmcia(void)
154 {
155         struct clk *clk;
156 
157         gpiod_add_lookup_table(&sa1111_pcmcia_gpio_table);
158 
159         /* Add an alias for the SA1111 PCMCIA clock */
160         clk = clk_get_sys("pxa2xx-pcmcia", NULL);
161         if (!IS_ERR(clk)) {
162                 clkdev_create(clk, NULL, "1800");
163                 clk_put(clk);
164         }
165 }
166 
167 static struct resource sa1111_resources[] = {
168         [0] = {
169                 .start  = 0x10000000,
170                 .end    = 0x10001fff,
171                 .flags  = IORESOURCE_MEM,
172         },
173         [1] = {
174                 .start  = LUBBOCK_SA1111_IRQ,
175                 .end    = LUBBOCK_SA1111_IRQ,
176                 .flags  = IORESOURCE_IRQ,
177         },
178 };
179 
180 static struct sa1111_platform_data sa1111_info = {
181         .irq_base       = LUBBOCK_SA1111_IRQ_BASE,
182         .disable_devs   = SA1111_DEVID_SAC,
183 };
184 
185 static struct platform_device sa1111_device = {
186         .name           = "sa1111",
187         .id             = -1,
188         .num_resources  = ARRAY_SIZE(sa1111_resources),
189         .resource       = sa1111_resources,
190         .dev            = {
191                 .platform_data  = &sa1111_info,
192         },
193 };
194 
195 /* ADS7846 is connected through SSP ... and if your board has J5 populated,
196  * you can select it to replace the ucb1400 by switching the touchscreen cable
197  * (to J5) and poking board registers (as done below).  Else it's only useful
198  * for the temperature sensors.
199  */
200 static struct pxa2xx_spi_controller pxa_ssp_master_info = {
201         .num_chipselect = 1,
202 };
203 
204 static int lubbock_ads7846_pendown_state(void)
205 {
206         /* TS_BUSY is bit 8 in LUB_MISC_RD, but pendown is irq-only */
207         return 0;
208 }
209 
210 static struct ads7846_platform_data ads_info = {
211         .model                  = 7846,
212         .vref_delay_usecs       = 100,          /* internal, no cap */
213         .get_pendown_state      = lubbock_ads7846_pendown_state,
214         // .x_plate_ohms                = 500,  /* GUESS! */
215         // .y_plate_ohms                = 500,  /* GUESS! */
216 };
217 
218 static void ads7846_cs(u32 command)
219 {
220         static const unsigned   TS_nCS = 1 << 11;
221         lubbock_set_misc_wr(TS_nCS, (command == PXA2XX_CS_ASSERT) ? 0 : TS_nCS);
222 }
223 
224 static struct pxa2xx_spi_chip ads_hw = {
225         .tx_threshold           = 1,
226         .rx_threshold           = 2,
227         .cs_control             = ads7846_cs,
228 };
229 
230 static struct spi_board_info spi_board_info[] __initdata = { {
231         .modalias       = "ads7846",
232         .platform_data  = &ads_info,
233         .controller_data = &ads_hw,
234         .irq            = LUBBOCK_BB_IRQ,
235         .max_speed_hz   = 120000 /* max sample rate at 3V */
236                                 * 26 /* command + data + overhead */,
237         .bus_num        = 1,
238         .chip_select    = 0,
239 },
240 };
241 
242 static struct resource smc91x_resources[] = {
243         [0] = {
244                 .name   = "smc91x-regs",
245                 .start  = 0x0c000c00,
246                 .end    = 0x0c0fffff,
247                 .flags  = IORESOURCE_MEM,
248         },
249         [1] = {
250                 .start  = LUBBOCK_ETH_IRQ,
251                 .end    = LUBBOCK_ETH_IRQ,
252                 .flags  = IORESOURCE_IRQ | IORESOURCE_IRQ_HIGHEDGE,
253         },
254         [2] = {
255                 .name   = "smc91x-attrib",
256                 .start  = 0x0e000000,
257                 .end    = 0x0e0fffff,
258                 .flags  = IORESOURCE_MEM,
259         },
260 };
261 
262 static struct smc91x_platdata lubbock_smc91x_info = {
263         .flags  = SMC91X_USE_16BIT | SMC91X_NOWAIT | SMC91X_IO_SHIFT_2,
264 };
265 
266 static struct platform_device smc91x_device = {
267         .name           = "smc91x",
268         .id             = -1,
269         .num_resources  = ARRAY_SIZE(smc91x_resources),
270         .resource       = smc91x_resources,
271         .dev            = {
272                 .platform_data = &lubbock_smc91x_info,
273         },
274 };
275 
276 static struct resource flash_resources[] = {
277         [0] = {
278                 .start  = 0x00000000,
279                 .end    = SZ_64M - 1,
280                 .flags  = IORESOURCE_MEM,
281         },
282         [1] = {
283                 .start  = 0x04000000,
284                 .end    = 0x04000000 + SZ_64M - 1,
285                 .flags  = IORESOURCE_MEM,
286         },
287 };
288 
289 static struct mtd_partition lubbock_partitions[] = {
290         {
291                 .name =         "Bootloader",
292                 .size =         0x00040000,
293                 .offset =       0,
294                 .mask_flags =   MTD_WRITEABLE  /* force read-only */
295         },{
296                 .name =         "Kernel",
297                 .size =         0x00100000,
298                 .offset =       0x00040000,
299         },{
300                 .name =         "Filesystem",
301                 .size =         MTDPART_SIZ_FULL,
302                 .offset =       0x00140000
303         }
304 };
305 
306 static struct flash_platform_data lubbock_flash_data[2] = {
307         {
308                 .map_name       = "cfi_probe",
309                 .parts          = lubbock_partitions,
310                 .nr_parts       = ARRAY_SIZE(lubbock_partitions),
311         }, {
312                 .map_name       = "cfi_probe",
313                 .parts          = NULL,
314                 .nr_parts       = 0,
315         }
316 };
317 
318 static struct platform_device lubbock_flash_device[2] = {
319         {
320                 .name           = "pxa2xx-flash",
321                 .id             = 0,
322                 .dev = {
323                         .platform_data = &lubbock_flash_data[0],
324                 },
325                 .resource = &flash_resources[0],
326                 .num_resources = 1,
327         },
328         {
329                 .name           = "pxa2xx-flash",
330                 .id             = 1,
331                 .dev = {
332                         .platform_data = &lubbock_flash_data[1],
333                 },
334                 .resource = &flash_resources[1],
335                 .num_resources = 1,
336         },
337 };
338 
339 static struct resource lubbock_cplds_resources[] = {
340         [0] = {
341                 .start  = LUBBOCK_FPGA_PHYS + 0xc0,
342                 .end    = LUBBOCK_FPGA_PHYS + 0xe0 - 1,
343                 .flags  = IORESOURCE_MEM,
344         },
345         [1] = {
346                 .start  = PXA_GPIO_TO_IRQ(0),
347                 .end    = PXA_GPIO_TO_IRQ(0),
348                 .flags  = IORESOURCE_IRQ | IORESOURCE_IRQ_LOWEDGE,
349         },
350         [2] = {
351                 .start  = LUBBOCK_IRQ(0),
352                 .end    = LUBBOCK_IRQ(6),
353                 .flags  = IORESOURCE_IRQ,
354         },
355 };
356 
357 static struct platform_device lubbock_cplds_device = {
358         .name           = "pxa_cplds_irqs",
359         .id             = -1,
360         .resource       = &lubbock_cplds_resources[0],
361         .num_resources  = 3,
362 };
363 
364 
365 static struct platform_device *devices[] __initdata = {
366         &sa1111_device,
367         &smc91x_device,
368         &lubbock_flash_device[0],
369         &lubbock_flash_device[1],
370         &lubbock_cplds_device,
371 };
372 
373 static struct pxafb_mode_info sharp_lm8v31_mode = {
374         .pixclock       = 270000,
375         .xres           = 640,
376         .yres           = 480,
377         .bpp            = 16,
378         .hsync_len      = 1,
379         .left_margin    = 3,
380         .right_margin   = 3,
381         .vsync_len      = 1,
382         .upper_margin   = 0,
383         .lower_margin   = 0,
384         .sync           = FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
385         .cmap_greyscale = 0,
386 };
387 
388 static struct pxafb_mach_info sharp_lm8v31 = {
389         .modes          = &sharp_lm8v31_mode,
390         .num_modes      = 1,
391         .cmap_inverse   = 0,
392         .cmap_static    = 0,
393         .lcd_conn       = LCD_COLOR_DSTN_16BPP | LCD_PCLK_EDGE_FALL |
394                           LCD_AC_BIAS_FREQ(255),
395 };
396 
397 #define MMC_POLL_RATE           msecs_to_jiffies(1000)
398 
399 static irq_handler_t mmc_detect_int;
400 static void *mmc_detect_int_data;
401 static struct timer_list mmc_timer;
402 
403 static void lubbock_mmc_poll(struct timer_list *unused)
404 {
405         unsigned long flags;
406 
407         /* clear any previous irq state, then ... */
408         local_irq_save(flags);
409         LUB_IRQ_SET_CLR &= ~(1 << 0);
410         local_irq_restore(flags);
411 
412         /* poll until mmc/sd card is removed */
413         if (LUB_IRQ_SET_CLR & (1 << 0))
414                 mod_timer(&mmc_timer, jiffies + MMC_POLL_RATE);
415         else {
416                 (void) mmc_detect_int(LUBBOCK_SD_IRQ, mmc_detect_int_data);
417                 enable_irq(LUBBOCK_SD_IRQ);
418         }
419 }
420 
421 static irqreturn_t lubbock_detect_int(int irq, void *data)
422 {
423         /* IRQ is level triggered; disable, and poll for removal */
424         disable_irq(irq);
425         mod_timer(&mmc_timer, jiffies + MMC_POLL_RATE);
426 
427         return mmc_detect_int(irq, data);
428 }
429 
430 static int lubbock_mci_init(struct device *dev,
431                 irq_handler_t detect_int,
432                 void *data)
433 {
434         /* detect card insert/eject */
435         mmc_detect_int = detect_int;
436         mmc_detect_int_data = data;
437         timer_setup(&mmc_timer, lubbock_mmc_poll, 0);
438         return request_irq(LUBBOCK_SD_IRQ, lubbock_detect_int,
439                            0, "lubbock-sd-detect", data);
440 }
441 
442 static int lubbock_mci_get_ro(struct device *dev)
443 {
444         return (LUB_MISC_RD & (1 << 2)) != 0;
445 }
446 
447 static void lubbock_mci_exit(struct device *dev, void *data)
448 {
449         free_irq(LUBBOCK_SD_IRQ, data);
450         del_timer_sync(&mmc_timer);
451 }
452 
453 static struct pxamci_platform_data lubbock_mci_platform_data = {
454         .ocr_mask               = MMC_VDD_32_33|MMC_VDD_33_34,
455         .detect_delay_ms        = 10,
456         .init                   = lubbock_mci_init,
457         .get_ro                 = lubbock_mci_get_ro,
458         .exit                   = lubbock_mci_exit,
459 };
460 
461 static void lubbock_irda_transceiver_mode(struct device *dev, int mode)
462 {
463         unsigned long flags;
464 
465         local_irq_save(flags);
466         if (mode & IR_SIRMODE) {
467                 lubbock_set_misc_wr(BIT(4), 0);
468         } else if (mode & IR_FIRMODE) {
469                 lubbock_set_misc_wr(BIT(4), BIT(4));
470         }
471         pxa2xx_transceiver_mode(dev, mode);
472         local_irq_restore(flags);
473 }
474 
475 static struct pxaficp_platform_data lubbock_ficp_platform_data = {
476         .gpio_pwdown            = -1,
477         .transceiver_cap        = IR_SIRMODE | IR_FIRMODE,
478         .transceiver_mode       = lubbock_irda_transceiver_mode,
479 };
480 
481 static void __init lubbock_init(void)
482 {
483         int flashboot = (LUB_CONF_SWITCHES & 1);
484 
485         pxa2xx_mfp_config(ARRAY_AND_SIZE(lubbock_pin_config));
486 
487         lubbock_misc_wr_gc = gpio_reg_init(NULL, (void *)&LUB_MISC_WR,
488                                            -1, 16, "lubbock", 0, LUB_MISC_WR,
489                                            NULL, NULL, NULL);
490         if (IS_ERR(lubbock_misc_wr_gc)) {
491                 pr_err("Lubbock: unable to register lubbock GPIOs: %ld\n",
492                        PTR_ERR(lubbock_misc_wr_gc));
493                 lubbock_misc_wr_gc = NULL;
494         }
495 
496         pxa_set_ffuart_info(NULL);
497         pxa_set_btuart_info(NULL);
498         pxa_set_stuart_info(NULL);
499 
500         lubbock_init_pcmcia();
501 
502         clk_add_alias("SA1111_CLK", NULL, "GPIO11_CLK", NULL);
503         pxa_set_udc_info(&udc_info);
504         pxa_set_fb_info(NULL, &sharp_lm8v31);
505         pxa_set_mci_info(&lubbock_mci_platform_data);
506         pxa_set_ficp_info(&lubbock_ficp_platform_data);
507         pxa_set_ac97_info(NULL);
508 
509         lubbock_flash_data[0].width = lubbock_flash_data[1].width =
510                 (__raw_readl(BOOT_DEF) & 1) ? 2 : 4;
511         /* Compensate for the nROMBT switch which swaps the flash banks */
512         printk(KERN_NOTICE "Lubbock configured to boot from %s (bank %d)\n",
513                flashboot?"Flash":"ROM", flashboot);
514 
515         lubbock_flash_data[flashboot^1].name = "application-flash";
516         lubbock_flash_data[flashboot].name = "boot-rom";
517         (void) platform_add_devices(devices, ARRAY_SIZE(devices));
518 
519         pxa2xx_set_spi_info(1, &pxa_ssp_master_info);
520         spi_register_board_info(spi_board_info, ARRAY_SIZE(spi_board_info));
521 }
522 
523 static struct map_desc lubbock_io_desc[] __initdata = {
524         {       /* CPLD */
525                 .virtual        =  LUBBOCK_FPGA_VIRT,
526                 .pfn            = __phys_to_pfn(LUBBOCK_FPGA_PHYS),
527                 .length         = 0x00100000,
528                 .type           = MT_DEVICE
529         }
530 };
531 
532 static void __init lubbock_map_io(void)
533 {
534         pxa25x_map_io();
535         iotable_init(lubbock_io_desc, ARRAY_SIZE(lubbock_io_desc));
536 
537         PCFR |= PCFR_OPDE;
538 }
539 
540 /*
541  * Driver for the 8 discrete LEDs available for general use:
542  * Note: bits [15-8] are used to enable/blank the 8 7 segment hex displays
543  * so be sure to not monkey with them here.
544  */
545 
546 #if defined(CONFIG_NEW_LEDS) && defined(CONFIG_LEDS_CLASS)
547 struct lubbock_led {
548         struct led_classdev     cdev;
549         u8                      mask;
550 };
551 
552 /*
553  * The triggers lines up below will only be used if the
554  * LED triggers are compiled in.
555  */
556 static const struct {
557         const char *name;
558         const char *trigger;
559 } lubbock_leds[] = {
560         { "lubbock:D28", "default-on", },
561         { "lubbock:D27", "cpu0", },
562         { "lubbock:D26", "heartbeat" },
563         { "lubbock:D25", },
564         { "lubbock:D24", },
565         { "lubbock:D23", },
566         { "lubbock:D22", },
567         { "lubbock:D21", },
568 };
569 
570 static void lubbock_led_set(struct led_classdev *cdev,
571                               enum led_brightness b)
572 {
573         struct lubbock_led *led = container_of(cdev,
574                                          struct lubbock_led, cdev);
575         u32 reg = LUB_DISC_BLNK_LED;
576 
577         if (b != LED_OFF)
578                 reg |= led->mask;
579         else
580                 reg &= ~led->mask;
581 
582         LUB_DISC_BLNK_LED = reg;
583 }
584 
585 static enum led_brightness lubbock_led_get(struct led_classdev *cdev)
586 {
587         struct lubbock_led *led = container_of(cdev,
588                                          struct lubbock_led, cdev);
589         u32 reg = LUB_DISC_BLNK_LED;
590 
591         return (reg & led->mask) ? LED_FULL : LED_OFF;
592 }
593 
594 static int __init lubbock_leds_init(void)
595 {
596         int i;
597 
598         if (!machine_is_lubbock())
599                 return -ENODEV;
600 
601         /* All ON */
602         LUB_DISC_BLNK_LED |= 0xff;
603         for (i = 0; i < ARRAY_SIZE(lubbock_leds); i++) {
604                 struct lubbock_led *led;
605 
606                 led = kzalloc(sizeof(*led), GFP_KERNEL);
607                 if (!led)
608                         break;
609 
610                 led->cdev.name = lubbock_leds[i].name;
611                 led->cdev.brightness_set = lubbock_led_set;
612                 led->cdev.brightness_get = lubbock_led_get;
613                 led->cdev.default_trigger = lubbock_leds[i].trigger;
614                 led->mask = BIT(i);
615 
616                 if (led_classdev_register(NULL, &led->cdev) < 0) {
617                         kfree(led);
618                         break;
619                 }
620         }
621 
622         return 0;
623 }
624 
625 /*
626  * Since we may have triggers on any subsystem, defer registration
627  * until after subsystem_init.
628  */
629 fs_initcall(lubbock_leds_init);
630 #endif
631 
632 MACHINE_START(LUBBOCK, "Intel DBPXA250 Development Platform (aka Lubbock)")
633         /* Maintainer: MontaVista Software Inc. */
634         .map_io         = lubbock_map_io,
635         .nr_irqs        = LUBBOCK_NR_IRQS,
636         .init_irq       = pxa25x_init_irq,
637         .handle_irq     = pxa25x_handle_irq,
638         .init_time      = pxa_timer_init,
639         .init_machine   = lubbock_init,
640         .restart        = pxa_restart,
641 MACHINE_END
642 

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