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z2.c
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1 /*
2  * linux/arch/arm/mach-pxa/z2.c
3  *
4  * Support for the Zipit Z2 Handheld device.
5  *
6  * Copyright (C) 2009-2010 Marek Vasut <[email protected]>
7  *
8  * Based on research and code by: Ken McGuire
9  * Based on mainstone.c as modified for the Zipit Z2.
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/platform_device.h>
17 #include <linux/mtd/mtd.h>
18 #include <linux/mtd/partitions.h>
19 #include <linux/pwm_backlight.h>
20 #include <linux/z2_battery.h>
21 #include <linux/dma-mapping.h>
22 #include <linux/spi/spi.h>
23 #include <linux/spi/pxa2xx_spi.h>
24 #include <linux/spi/libertas_spi.h>
25 #include <linux/spi/lms283gf05.h>
26 #include <linux/power_supply.h>
27 #include <linux/mtd/physmap.h>
28 #include <linux/gpio.h>
29 #include <linux/gpio_keys.h>
30 #include <linux/delay.h>
32 #include <linux/i2c/pxa-i2c.h>
33 
34 #include <asm/mach-types.h>
35 #include <asm/mach/arch.h>
36 
37 #include <mach/pxa27x.h>
38 #include <mach/mfp-pxa27x.h>
39 #include <mach/z2.h>
43 #include <mach/pm.h>
44 
45 #include "generic.h"
46 #include "devices.h"
47 
48 /******************************************************************************
49  * Pin configuration
50  ******************************************************************************/
51 static unsigned long z2_pin_config[] = {
52 
53  /* LCD - 16bpp Active TFT */
74  GPIO19_GPIO, /* LCD reset */
75  GPIO88_GPIO, /* LCD chipselect */
76 
77  /* PWM */
78  GPIO115_PWM1_OUT, /* Keypad Backlight */
79  GPIO11_PWM2_OUT, /* LCD Backlight */
80 
81  /* MMC */
88  GPIO96_GPIO, /* SD detect */
89 
90  /* STUART */
93 
94  /* Keypad */
110 
111  /* I2C */
114 
115  /* SSP1 */
116  GPIO23_SSP1_SCLK, /* SSP1_SCK */
117  GPIO25_SSP1_TXD, /* SSP1_TXD */
118  GPIO26_SSP1_RXD, /* SSP1_RXD */
119 
120  /* SSP2 */
121  GPIO22_SSP2_SCLK, /* SSP2_SCK */
122  GPIO13_SSP2_TXD, /* SSP2_TXD */
123  GPIO40_SSP2_RXD, /* SSP2_RXD */
124 
125  /* LEDs */
126  GPIO10_GPIO, /* WiFi LED */
127  GPIO83_GPIO, /* Charging LED */
128  GPIO85_GPIO, /* Charged LED */
129 
130  /* I2S */
136 
137  /* MISC */
138  GPIO0_GPIO, /* AC power detect */
139  GPIO1_GPIO, /* Power button */
140  GPIO37_GPIO, /* Headphone detect */
141  GPIO98_GPIO, /* Lid switch */
142  GPIO14_GPIO, /* WiFi Power */
143  GPIO24_GPIO, /* WiFi CS */
144  GPIO36_GPIO, /* WiFi IRQ */
145  GPIO88_GPIO, /* LCD CS */
146 };
147 
148 /******************************************************************************
149  * NOR Flash
150  ******************************************************************************/
151 #if defined(CONFIG_MTD_PHYSMAP) || defined(CONFIG_MTD_PHYSMAP_MODULE)
152 static struct resource z2_flash_resource = {
153  .start = PXA_CS0_PHYS,
154  .end = PXA_CS0_PHYS + SZ_8M - 1,
155  .flags = IORESOURCE_MEM,
156 };
157 
158 static struct mtd_partition z2_flash_parts[] = {
159  {
160  .name = "U-Boot Bootloader",
161  .offset = 0x0,
162  .size = 0x40000,
163  }, {
164  .name = "U-Boot Environment",
165  .offset = 0x40000,
166  .size = 0x20000,
167  }, {
168  .name = "Flash",
169  .offset = 0x60000,
170  .size = MTDPART_SIZ_FULL,
171  },
172 };
173 
174 static struct physmap_flash_data z2_flash_data = {
175  .width = 2,
176  .parts = z2_flash_parts,
177  .nr_parts = ARRAY_SIZE(z2_flash_parts),
178 };
179 
180 static struct platform_device z2_flash = {
181  .name = "physmap-flash",
182  .id = -1,
183  .resource = &z2_flash_resource,
184  .num_resources = 1,
185  .dev = {
186  .platform_data = &z2_flash_data,
187  },
188 };
189 
190 static void __init z2_nor_init(void)
191 {
192  platform_device_register(&z2_flash);
193 }
194 #else
195 static inline void z2_nor_init(void) {}
196 #endif
197 
198 /******************************************************************************
199  * Backlight
200  ******************************************************************************/
201 #if defined(CONFIG_BACKLIGHT_PWM) || defined(CONFIG_BACKLIGHT_PWM_MODULE)
202 static struct platform_pwm_backlight_data z2_backlight_data[] = {
203  [0] = {
204  /* Keypad Backlight */
205  .pwm_id = 1,
206  .max_brightness = 1023,
207  .dft_brightness = 0,
208  .pwm_period_ns = 1260320,
209  },
210  [1] = {
211  /* LCD Backlight */
212  .pwm_id = 2,
213  .max_brightness = 1023,
214  .dft_brightness = 512,
215  .pwm_period_ns = 1260320,
216  },
217 };
218 
219 static struct platform_device z2_backlight_devices[2] = {
220  {
221  .name = "pwm-backlight",
222  .id = 0,
223  .dev = {
224  .platform_data = &z2_backlight_data[1],
225  },
226  },
227  {
228  .name = "pwm-backlight",
229  .id = 1,
230  .dev = {
231  .platform_data = &z2_backlight_data[0],
232  },
233  },
234 };
235 static void __init z2_pwm_init(void)
236 {
237  platform_device_register(&z2_backlight_devices[0]);
238  platform_device_register(&z2_backlight_devices[1]);
239 }
240 #else
241 static inline void z2_pwm_init(void) {}
242 #endif
243 
244 /******************************************************************************
245  * Framebuffer
246  ******************************************************************************/
247 #if defined(CONFIG_FB_PXA) || defined(CONFIG_FB_PXA_MODULE)
248 static struct pxafb_mode_info z2_lcd_modes[] = {
249 {
250  .pixclock = 192000,
251  .xres = 240,
252  .yres = 320,
253  .bpp = 16,
254 
255  .left_margin = 4,
256  .right_margin = 8,
257  .upper_margin = 4,
258  .lower_margin = 8,
259 
260  .hsync_len = 4,
261  .vsync_len = 4,
262 },
263 };
264 
265 static struct pxafb_mach_info z2_lcd_screen = {
266  .modes = z2_lcd_modes,
267  .num_modes = ARRAY_SIZE(z2_lcd_modes),
270 };
271 
272 static void __init z2_lcd_init(void)
273 {
274  pxa_set_fb_info(NULL, &z2_lcd_screen);
275 }
276 #else
277 static inline void z2_lcd_init(void) {}
278 #endif
279 
280 /******************************************************************************
281  * SD/MMC card controller
282  ******************************************************************************/
283 #if defined(CONFIG_MMC_PXA) || defined(CONFIG_MMC_PXA_MODULE)
284 static struct pxamci_platform_data z2_mci_platform_data = {
286  .gpio_card_detect = GPIO96_ZIPITZ2_SD_DETECT,
287  .gpio_power = -1,
288  .gpio_card_ro = -1,
289  .detect_delay_ms = 200,
290 };
291 
292 static void __init z2_mmc_init(void)
293 {
294  pxa_set_mci_info(&z2_mci_platform_data);
295 }
296 #else
297 static inline void z2_mmc_init(void) {}
298 #endif
299 
300 /******************************************************************************
301  * LEDs
302  ******************************************************************************/
303 #if defined(CONFIG_LEDS_GPIO) || defined(CONFIG_LEDS_GPIO_MODULE)
304 struct gpio_led z2_gpio_leds[] = {
305 {
306  .name = "z2:green:wifi",
307  .default_trigger = "none",
308  .gpio = GPIO10_ZIPITZ2_LED_WIFI,
309  .active_low = 1,
310 }, {
311  .name = "z2:green:charged",
312  .default_trigger = "mmc0",
314  .active_low = 1,
315 }, {
316  .name = "z2:amber:charging",
317  .default_trigger = "Z2-charging-or-full",
319  .active_low = 1,
320 },
321 };
322 
323 static struct gpio_led_platform_data z2_gpio_led_info = {
324  .leds = z2_gpio_leds,
325  .num_leds = ARRAY_SIZE(z2_gpio_leds),
326 };
327 
328 static struct platform_device z2_leds = {
329  .name = "leds-gpio",
330  .id = -1,
331  .dev = {
332  .platform_data = &z2_gpio_led_info,
333  }
334 };
335 
336 static void __init z2_leds_init(void)
337 {
338  platform_device_register(&z2_leds);
339 }
340 #else
341 static inline void z2_leds_init(void) {}
342 #endif
343 
344 /******************************************************************************
345  * GPIO keyboard
346  ******************************************************************************/
347 #if defined(CONFIG_KEYBOARD_PXA27x) || defined(CONFIG_KEYBOARD_PXA27x_MODULE)
348 static unsigned int z2_matrix_keys[] = {
349  KEY(0, 0, KEY_OPTION),
350  KEY(1, 0, KEY_UP),
351  KEY(2, 0, KEY_DOWN),
352  KEY(3, 0, KEY_LEFT),
353  KEY(4, 0, KEY_RIGHT),
354  KEY(5, 0, KEY_END),
355  KEY(6, 0, KEY_KPPLUS),
356 
357  KEY(0, 1, KEY_HOME),
358  KEY(1, 1, KEY_Q),
359  KEY(2, 1, KEY_I),
360  KEY(3, 1, KEY_G),
361  KEY(4, 1, KEY_X),
362  KEY(5, 1, KEY_ENTER),
363  KEY(6, 1, KEY_KPMINUS),
364 
365  KEY(0, 2, KEY_PAGEUP),
366  KEY(1, 2, KEY_W),
367  KEY(2, 2, KEY_O),
368  KEY(3, 2, KEY_H),
369  KEY(4, 2, KEY_C),
370  KEY(5, 2, KEY_LEFTALT),
371 
372  KEY(0, 3, KEY_PAGEDOWN),
373  KEY(1, 3, KEY_E),
374  KEY(2, 3, KEY_P),
375  KEY(3, 3, KEY_J),
376  KEY(4, 3, KEY_V),
377  KEY(5, 3, KEY_LEFTSHIFT),
378 
379  KEY(0, 4, KEY_ESC),
380  KEY(1, 4, KEY_R),
381  KEY(2, 4, KEY_A),
382  KEY(3, 4, KEY_K),
383  KEY(4, 4, KEY_B),
384  KEY(5, 4, KEY_LEFTCTRL),
385 
386  KEY(0, 5, KEY_TAB),
387  KEY(1, 5, KEY_T),
388  KEY(2, 5, KEY_S),
389  KEY(3, 5, KEY_L),
390  KEY(4, 5, KEY_N),
391  KEY(5, 5, KEY_SPACE),
392 
393  KEY(0, 6, KEY_STOPCD),
394  KEY(1, 6, KEY_Y),
395  KEY(2, 6, KEY_D),
396  KEY(3, 6, KEY_BACKSPACE),
397  KEY(4, 6, KEY_M),
398  KEY(5, 6, KEY_COMMA),
399 
400  KEY(0, 7, KEY_PLAYCD),
401  KEY(1, 7, KEY_U),
402  KEY(2, 7, KEY_F),
403  KEY(3, 7, KEY_Z),
404  KEY(4, 7, KEY_SEMICOLON),
405  KEY(5, 7, KEY_DOT),
406 };
407 
408 static struct pxa27x_keypad_platform_data z2_keypad_platform_data = {
409  .matrix_key_rows = 7,
410  .matrix_key_cols = 8,
411  .matrix_key_map = z2_matrix_keys,
412  .matrix_key_map_size = ARRAY_SIZE(z2_matrix_keys),
413 
414  .debounce_interval = 30,
415 };
416 
417 static void __init z2_mkp_init(void)
418 {
419  pxa_set_keypad_info(&z2_keypad_platform_data);
420 }
421 #else
422 static inline void z2_mkp_init(void) {}
423 #endif
424 
425 /******************************************************************************
426  * GPIO keys
427  ******************************************************************************/
428 #if defined(CONFIG_KEYBOARD_GPIO) || defined(CONFIG_KEYBOARD_GPIO_MODULE)
429 static struct gpio_keys_button z2_pxa_buttons[] = {
430  {
431  .code = KEY_POWER,
433  .active_low = 0,
434  .desc = "Power Button",
435  .wakeup = 1,
436  .type = EV_KEY,
437  },
438  {
439  .code = SW_LID,
441  .active_low = 1,
442  .desc = "Lid Switch",
443  .wakeup = 0,
444  .type = EV_SW,
445  },
446 };
447 
448 static struct gpio_keys_platform_data z2_pxa_keys_data = {
449  .buttons = z2_pxa_buttons,
450  .nbuttons = ARRAY_SIZE(z2_pxa_buttons),
451 };
452 
453 static struct platform_device z2_pxa_keys = {
454  .name = "gpio-keys",
455  .id = -1,
456  .dev = {
457  .platform_data = &z2_pxa_keys_data,
458  },
459 };
460 
461 static void __init z2_keys_init(void)
462 {
463  platform_device_register(&z2_pxa_keys);
464 }
465 #else
466 static inline void z2_keys_init(void) {}
467 #endif
468 
469 /******************************************************************************
470  * Battery
471  ******************************************************************************/
472 #if defined(CONFIG_I2C_PXA) || defined(CONFIG_I2C_PXA_MODULE)
473 static struct z2_battery_info batt_chip_info = {
474  .batt_I2C_bus = 0,
475  .batt_I2C_addr = 0x55,
476  .batt_I2C_reg = 2,
477  .charge_gpio = GPIO0_ZIPITZ2_AC_DETECT,
478  .min_voltage = 3475000,
479  .max_voltage = 4190000,
480  .batt_div = 59,
481  .batt_mult = 1000000,
482  .batt_tech = POWER_SUPPLY_TECHNOLOGY_LION,
483  .batt_name = "Z2",
484 };
485 
486 static struct i2c_board_info __initdata z2_i2c_board_info[] = {
487  {
488  I2C_BOARD_INFO("aer915", 0x55),
489  .platform_data = &batt_chip_info,
490  }, {
491  I2C_BOARD_INFO("wm8750", 0x1b),
492  },
493 
494 };
495 
496 static void __init z2_i2c_init(void)
497 {
499  i2c_register_board_info(0, ARRAY_AND_SIZE(z2_i2c_board_info));
500 }
501 #else
502 static inline void z2_i2c_init(void) {}
503 #endif
504 
505 /******************************************************************************
506  * SSP Devices - WiFi and LCD control
507  ******************************************************************************/
508 #if defined(CONFIG_SPI_PXA2XX) || defined(CONFIG_SPI_PXA2XX_MODULE)
509 /* WiFi */
510 static int z2_lbs_spi_setup(struct spi_device *spi)
511 {
512  int ret = 0;
513 
514  ret = gpio_request(GPIO14_ZIPITZ2_WIFI_POWER, "WiFi Power");
515  if (ret)
516  goto err;
517 
519  if (ret)
520  goto err2;
521 
522  /* Wait until card is powered on */
523  mdelay(180);
524 
525  spi->bits_per_word = 16;
526  spi->mode = SPI_MODE_2,
527 
528  spi_setup(spi);
529 
530  return 0;
531 
532 err2:
534 err:
535  return ret;
536 };
537 
538 static int z2_lbs_spi_teardown(struct spi_device *spi)
539 {
542 
543  return 0;
544 };
545 
546 static struct pxa2xx_spi_chip z2_lbs_chip_info = {
547  .rx_threshold = 8,
548  .tx_threshold = 8,
549  .timeout = 1000,
550  .gpio_cs = GPIO24_ZIPITZ2_WIFI_CS,
551 };
552 
553 static struct libertas_spi_platform_data z2_lbs_pdata = {
554  .use_dummy_writes = 1,
555  .setup = z2_lbs_spi_setup,
556  .teardown = z2_lbs_spi_teardown,
557 };
558 
559 /* LCD */
560 static struct pxa2xx_spi_chip lms283_chip_info = {
561  .rx_threshold = 1,
562  .tx_threshold = 1,
563  .timeout = 64,
564  .gpio_cs = GPIO88_ZIPITZ2_LCD_CS,
565 };
566 
567 static const struct lms283gf05_pdata lms283_pdata = {
569 };
570 
571 static struct spi_board_info spi_board_info[] __initdata = {
572 {
573  .modalias = "libertas_spi",
574  .platform_data = &z2_lbs_pdata,
575  .controller_data = &z2_lbs_chip_info,
577  .max_speed_hz = 13000000,
578  .bus_num = 1,
579  .chip_select = 0,
580 },
581 {
582  .modalias = "lms283gf05",
583  .controller_data = &lms283_chip_info,
584  .platform_data = &lms283_pdata,
585  .max_speed_hz = 400000,
586  .bus_num = 2,
587  .chip_select = 0,
588 },
589 };
590 
591 static struct pxa2xx_spi_master pxa_ssp1_master_info = {
593  .num_chipselect = 1,
594  .enable_dma = 1,
595 };
596 
597 static struct pxa2xx_spi_master pxa_ssp2_master_info = {
599  .num_chipselect = 1,
600 };
601 
602 static void __init z2_spi_init(void)
603 {
604  pxa2xx_set_spi_info(1, &pxa_ssp1_master_info);
605  pxa2xx_set_spi_info(2, &pxa_ssp2_master_info);
607 }
608 #else
609 static inline void z2_spi_init(void) {}
610 #endif
611 
612 /******************************************************************************
613  * Core power regulator
614  ******************************************************************************/
615 #if defined(CONFIG_REGULATOR_TPS65023) || \
616  defined(CONFIG_REGULATOR_TPS65023_MODULE)
617 static struct regulator_consumer_supply z2_tps65021_consumers[] = {
618  REGULATOR_SUPPLY("vcc_core", NULL),
619 };
620 
621 static struct regulator_init_data z2_tps65021_info[] = {
622  {
623  .constraints = {
624  .name = "vcc_core range",
625  .min_uV = 800000,
626  .max_uV = 1600000,
627  .always_on = 1,
628  .valid_ops_mask = REGULATOR_CHANGE_VOLTAGE,
629  },
630  .consumer_supplies = z2_tps65021_consumers,
631  .num_consumer_supplies = ARRAY_SIZE(z2_tps65021_consumers),
632  }, {
633  .constraints = {
634  .name = "DCDC2",
635  .min_uV = 3300000,
636  .max_uV = 3300000,
637  .always_on = 1,
638  },
639  }, {
640  .constraints = {
641  .name = "DCDC3",
642  .min_uV = 1800000,
643  .max_uV = 1800000,
644  .always_on = 1,
645  },
646  }, {
647  .constraints = {
648  .name = "LDO1",
649  .min_uV = 1000000,
650  .max_uV = 3150000,
651  .always_on = 1,
652  },
653  }, {
654  .constraints = {
655  .name = "LDO2",
656  .min_uV = 1050000,
657  .max_uV = 3300000,
658  .always_on = 1,
659  },
660  }
661 };
662 
663 static struct i2c_board_info __initdata z2_pi2c_board_info[] = {
664  {
665  I2C_BOARD_INFO("tps65021", 0x48),
666  .platform_data = &z2_tps65021_info,
667  },
668 };
669 
670 static void __init z2_pmic_init(void)
671 {
673  i2c_register_board_info(1, ARRAY_AND_SIZE(z2_pi2c_board_info));
674 }
675 #else
676 static inline void z2_pmic_init(void) {}
677 #endif
678 
679 #ifdef CONFIG_PM
680 static void z2_power_off(void)
681 {
682  /* We're using deep sleep as poweroff, so clear PSPR to ensure that
683  * bootloader will jump to its entry point in resume handler
684  */
685  PSPR = 0x0;
689 }
690 #else
691 #define z2_power_off NULL
692 #endif
693 
694 /******************************************************************************
695  * Machine init
696  ******************************************************************************/
697 static void __init z2_init(void)
698 {
699  pxa2xx_mfp_config(ARRAY_AND_SIZE(z2_pin_config));
700 
704 
705  z2_lcd_init();
706  z2_mmc_init();
707  z2_mkp_init();
708  z2_i2c_init();
709  z2_spi_init();
710  z2_nor_init();
711  z2_pwm_init();
712  z2_leds_init();
713  z2_keys_init();
714  z2_pmic_init();
715 
717 }
718 
719 MACHINE_START(ZIPIT2, "Zipit Z2")
720  .atag_offset = 0x100,
721  .map_io = pxa27x_map_io,
722  .nr_irqs = PXA_NR_IRQS,
723  .init_irq = pxa27x_init_irq,
724  .handle_irq = pxa27x_handle_irq,
725  .timer = &pxa_timer,
726  .init_machine = z2_init,
727  .restart = pxa_restart,