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mach-n30.c
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1 /* Machine specific code for the Acer n30, Acer N35, Navman PiN 570,
2  * Yakumo AlphaX and Airis NC05 PDAs.
3  *
4  * Copyright (c) 2003-2005 Simtec Electronics
5  * Ben Dooks <[email protected]>
6  *
7  * Copyright (c) 2005-2008 Christer Weinigel <[email protected]>
8  *
9  * There is a wiki with more information about the n30 port at
10  * http://handhelds.org/moin/moin.cgi/AcerN30Documentation .
11  *
12  * This program is free software; you can redistribute it and/or modify
13  * it under the terms of the GNU General Public License version 2 as
14  * published by the Free Software Foundation.
15  */
16 
17 #include <linux/kernel.h>
18 #include <linux/types.h>
19 
20 #include <linux/gpio_keys.h>
21 #include <linux/init.h>
22 #include <linux/gpio.h>
23 #include <linux/input.h>
24 #include <linux/interrupt.h>
25 #include <linux/platform_device.h>
26 #include <linux/serial_core.h>
27 #include <linux/timer.h>
28 #include <linux/io.h>
29 #include <linux/mmc/host.h>
30 
31 #include <mach/hardware.h>
32 #include <asm/irq.h>
33 #include <asm/mach-types.h>
34 
35 #include <mach/fb.h>
36 #include <linux/platform_data/leds-s3c24xx.h>
37 #include <mach/regs-gpio.h>
38 #include <mach/regs-lcd.h>
39 
40 #include <asm/mach/arch.h>
41 #include <asm/mach/irq.h>
42 #include <asm/mach/map.h>
43 
44 #include <linux/platform_data/i2c-s3c2410.h>
45 #include <plat/regs-serial.h>
46 
47 #include <plat/clock.h>
48 #include <plat/cpu.h>
49 #include <plat/devs.h>
50 #include <linux/platform_data/mmc-s3cmci.h>
51 #include <plat/s3c2410.h>
52 #include <linux/platform_data/usb-s3c2410_udc.h>
53 
54 #include "common.h"
55 
56 static struct map_desc n30_iodesc[] __initdata = {
57  /* nothing here yet */
58 };
59 
60 static struct s3c2410_uartcfg n30_uartcfgs[] = {
61  /* Normal serial port */
62  [0] = {
63  .hwport = 0,
64  .flags = 0,
65  .ucon = 0x2c5,
66  .ulcon = 0x03,
67  .ufcon = 0x51,
68  },
69  /* IR port */
70  [1] = {
71  .hwport = 1,
72  .flags = 0,
73  .uart_flags = UPF_CONS_FLOW,
74  .ucon = 0x2c5,
75  .ulcon = 0x43,
76  .ufcon = 0x51,
77  },
78  /* On the N30 the bluetooth controller is connected here.
79  * On the N35 and variants the GPS receiver is connected here. */
80  [2] = {
81  .hwport = 2,
82  .flags = 0,
83  .ucon = 0x2c5,
84  .ulcon = 0x03,
85  .ufcon = 0x51,
86  },
87 };
88 
89 static struct s3c2410_udc_mach_info n30_udc_cfg __initdata = {
90  .vbus_pin = S3C2410_GPG(1),
91  .vbus_pin_inverted = 0,
92  .pullup_pin = S3C2410_GPB(3),
93 };
94 
95 static struct gpio_keys_button n30_buttons[] = {
96  {
97  .gpio = S3C2410_GPF(0),
98  .code = KEY_POWER,
99  .desc = "Power",
100  .active_low = 0,
101  },
102  {
103  .gpio = S3C2410_GPG(9),
104  .code = KEY_UP,
105  .desc = "Thumbwheel Up",
106  .active_low = 0,
107  },
108  {
109  .gpio = S3C2410_GPG(8),
110  .code = KEY_DOWN,
111  .desc = "Thumbwheel Down",
112  .active_low = 0,
113  },
114  {
115  .gpio = S3C2410_GPG(7),
116  .code = KEY_ENTER,
117  .desc = "Thumbwheel Press",
118  .active_low = 0,
119  },
120  {
121  .gpio = S3C2410_GPF(7),
122  .code = KEY_HOMEPAGE,
123  .desc = "Home",
124  .active_low = 0,
125  },
126  {
127  .gpio = S3C2410_GPF(6),
128  .code = KEY_CALENDAR,
129  .desc = "Calendar",
130  .active_low = 0,
131  },
132  {
133  .gpio = S3C2410_GPF(5),
134  .code = KEY_ADDRESSBOOK,
135  .desc = "Contacts",
136  .active_low = 0,
137  },
138  {
139  .gpio = S3C2410_GPF(4),
140  .code = KEY_MAIL,
141  .desc = "Mail",
142  .active_low = 0,
143  },
144 };
145 
146 static struct gpio_keys_platform_data n30_button_data = {
147  .buttons = n30_buttons,
148  .nbuttons = ARRAY_SIZE(n30_buttons),
149 };
150 
151 static struct platform_device n30_button_device = {
152  .name = "gpio-keys",
153  .id = -1,
154  .dev = {
155  .platform_data = &n30_button_data,
156  }
157 };
158 
159 static struct gpio_keys_button n35_buttons[] = {
160  {
161  .gpio = S3C2410_GPF(0),
162  .code = KEY_POWER,
163  .type = EV_PWR,
164  .desc = "Power",
165  .active_low = 0,
166  .wakeup = 1,
167  },
168  {
169  .gpio = S3C2410_GPG(9),
170  .code = KEY_UP,
171  .desc = "Joystick Up",
172  .active_low = 0,
173  },
174  {
175  .gpio = S3C2410_GPG(8),
176  .code = KEY_DOWN,
177  .desc = "Joystick Down",
178  .active_low = 0,
179  },
180  {
181  .gpio = S3C2410_GPG(6),
182  .code = KEY_DOWN,
183  .desc = "Joystick Left",
184  .active_low = 0,
185  },
186  {
187  .gpio = S3C2410_GPG(5),
188  .code = KEY_DOWN,
189  .desc = "Joystick Right",
190  .active_low = 0,
191  },
192  {
193  .gpio = S3C2410_GPG(7),
194  .code = KEY_ENTER,
195  .desc = "Joystick Press",
196  .active_low = 0,
197  },
198  {
199  .gpio = S3C2410_GPF(7),
200  .code = KEY_HOMEPAGE,
201  .desc = "Home",
202  .active_low = 0,
203  },
204  {
205  .gpio = S3C2410_GPF(6),
206  .code = KEY_CALENDAR,
207  .desc = "Calendar",
208  .active_low = 0,
209  },
210  {
211  .gpio = S3C2410_GPF(5),
212  .code = KEY_ADDRESSBOOK,
213  .desc = "Contacts",
214  .active_low = 0,
215  },
216  {
217  .gpio = S3C2410_GPF(4),
218  .code = KEY_MAIL,
219  .desc = "Mail",
220  .active_low = 0,
221  },
222  {
223  .gpio = S3C2410_GPF(3),
224  .code = SW_RADIO,
225  .desc = "GPS Antenna",
226  .active_low = 0,
227  },
228  {
229  .gpio = S3C2410_GPG(2),
230  .code = SW_HEADPHONE_INSERT,
231  .desc = "Headphone",
232  .active_low = 0,
233  },
234 };
235 
236 static struct gpio_keys_platform_data n35_button_data = {
237  .buttons = n35_buttons,
238  .nbuttons = ARRAY_SIZE(n35_buttons),
239 };
240 
241 static struct platform_device n35_button_device = {
242  .name = "gpio-keys",
243  .id = -1,
244  .num_resources = 0,
245  .dev = {
246  .platform_data = &n35_button_data,
247  }
248 };
249 
250 /* This is the bluetooth LED on the device. */
251 static struct s3c24xx_led_platdata n30_blue_led_pdata = {
252  .name = "blue_led",
253  .gpio = S3C2410_GPG(6),
254  .def_trigger = "",
255 };
256 
257 /* This is the blue LED on the device. Originally used to indicate GPS activity
258  * by flashing. */
259 static struct s3c24xx_led_platdata n35_blue_led_pdata = {
260  .name = "blue_led",
261  .gpio = S3C2410_GPD(8),
262  .def_trigger = "",
263 };
264 
265 /* This LED is driven by the battery microcontroller, and is blinking
266  * red, blinking green or solid green when the battery is low,
267  * charging or full respectively. By driving GPD9 low, it's possible
268  * to force the LED to blink red, so call that warning LED. */
269 static struct s3c24xx_led_platdata n30_warning_led_pdata = {
270  .name = "warning_led",
271  .flags = S3C24XX_LEDF_ACTLOW,
272  .gpio = S3C2410_GPD(9),
273  .def_trigger = "",
274 };
275 
276 static struct s3c24xx_led_platdata n35_warning_led_pdata = {
277  .name = "warning_led",
278  .flags = S3C24XX_LEDF_ACTLOW | S3C24XX_LEDF_TRISTATE,
279  .gpio = S3C2410_GPD(9),
280  .def_trigger = "",
281 };
282 
283 static struct platform_device n30_blue_led = {
284  .name = "s3c24xx_led",
285  .id = 1,
286  .dev = {
287  .platform_data = &n30_blue_led_pdata,
288  },
289 };
290 
291 static struct platform_device n35_blue_led = {
292  .name = "s3c24xx_led",
293  .id = 1,
294  .dev = {
295  .platform_data = &n35_blue_led_pdata,
296  },
297 };
298 
299 static struct platform_device n30_warning_led = {
300  .name = "s3c24xx_led",
301  .id = 2,
302  .dev = {
303  .platform_data = &n30_warning_led_pdata,
304  },
305 };
306 
307 static struct platform_device n35_warning_led = {
308  .name = "s3c24xx_led",
309  .id = 2,
310  .dev = {
311  .platform_data = &n35_warning_led_pdata,
312  },
313 };
314 
315 static struct s3c2410fb_display n30_display __initdata = {
316  .type = S3C2410_LCDCON1_TFT,
317  .width = 240,
318  .height = 320,
319  .pixclock = 170000,
320 
321  .xres = 240,
322  .yres = 320,
323  .bpp = 16,
324  .left_margin = 3,
325  .right_margin = 40,
326  .hsync_len = 40,
327  .upper_margin = 2,
328  .lower_margin = 3,
329  .vsync_len = 2,
330 
331  .lcdcon5 = S3C2410_LCDCON5_INVVLINE | S3C2410_LCDCON5_INVVFRAME,
332 };
333 
334 static struct s3c2410fb_mach_info n30_fb_info __initdata = {
335  .displays = &n30_display,
336  .num_displays = 1,
337  .default_display = 0,
338  .lpcsel = 0x06,
339 };
340 
341 static void n30_sdi_set_power(unsigned char power_mode, unsigned short vdd)
342 {
343  switch (power_mode) {
344  case MMC_POWER_ON:
345  case MMC_POWER_UP:
346  gpio_set_value(S3C2410_GPG(4), 1);
347  break;
348  case MMC_POWER_OFF:
349  default:
350  gpio_set_value(S3C2410_GPG(4), 0);
351  break;
352  }
353 }
354 
355 static struct s3c24xx_mci_pdata n30_mci_cfg __initdata = {
356  .gpio_detect = S3C2410_GPF(1),
357  .gpio_wprotect = S3C2410_GPG(10),
358  .ocr_avail = MMC_VDD_32_33,
359  .set_power = n30_sdi_set_power,
360 };
361 
362 static struct platform_device *n30_devices[] __initdata = {
363  &s3c_device_lcd,
364  &s3c_device_wdt,
365  &s3c_device_i2c0,
366  &s3c_device_iis,
367  &s3c_device_ohci,
368  &s3c_device_rtc,
369  &s3c_device_usbgadget,
370  &s3c_device_sdi,
371  &n30_button_device,
372  &n30_blue_led,
373  &n30_warning_led,
374 };
375 
376 static struct platform_device *n35_devices[] __initdata = {
377  &s3c_device_lcd,
378  &s3c_device_wdt,
379  &s3c_device_i2c0,
380  &s3c_device_iis,
381  &s3c_device_rtc,
382  &s3c_device_usbgadget,
383  &s3c_device_sdi,
384  &n35_button_device,
385  &n35_blue_led,
386  &n35_warning_led,
387 };
388 
389 static struct s3c2410_platform_i2c __initdata n30_i2ccfg = {
390  .flags = 0,
391  .slave_addr = 0x10,
392  .frequency = 10*1000,
393 };
394 
395 /* Lots of hardcoded stuff, but it sets up the hardware in a useful
396  * state so that we can boot Linux directly from flash. */
397 static void __init n30_hwinit(void)
398 {
399  /* GPA0-11 special functions -- unknown what they do
400  * GPA12 N30 special function -- unknown what it does
401  * N35/PiN output -- unknown what it does
402  *
403  * A12 is nGCS1 on the N30 and an output on the N35/PiN. I
404  * don't think it does anything useful on the N30, so I ought
405  * to make it an output there too since it always driven to 0
406  * as far as I can tell. */
407  if (machine_is_n30())
408  __raw_writel(0x007fffff, S3C2410_GPACON);
409  if (machine_is_n35())
410  __raw_writel(0x007fefff, S3C2410_GPACON);
411  __raw_writel(0x00000000, S3C2410_GPADAT);
412 
413  /* GPB0 TOUT0 backlight level
414  * GPB1 output 1=backlight on
415  * GPB2 output IrDA enable 0=transceiver enabled, 1=disabled
416  * GPB3 output USB D+ pull up 0=disabled, 1=enabled
417  * GPB4 N30 output -- unknown function
418  * N30/PiN GPS control 0=GPS enabled, 1=GPS disabled
419  * GPB5 output -- unknown function
420  * GPB6 input -- unknown function
421  * GPB7 output -- unknown function
422  * GPB8 output -- probably LCD driver enable
423  * GPB9 output -- probably LCD VSYNC driver enable
424  * GPB10 output -- probably LCD HSYNC driver enable
425  */
426  __raw_writel(0x00154556, S3C2410_GPBCON);
427  __raw_writel(0x00000750, S3C2410_GPBDAT);
428  __raw_writel(0x00000073, S3C2410_GPBUP);
429 
430  /* GPC0 input RS232 DCD/DSR/RI
431  * GPC1 LCD
432  * GPC2 output RS232 DTR?
433  * GPC3 input RS232 DCD/DSR/RI
434  * GPC4 LCD
435  * GPC5 output 0=NAND write enabled, 1=NAND write protect
436  * GPC6 input -- unknown function
437  * GPC7 input charger status 0=charger connected
438  * this input can be triggered by power on the USB device
439  * port too, but will go back to disconnected soon after.
440  * GPC8 N30/N35 output -- unknown function, always driven to 1
441  * PiN input -- unknown function, always read as 1
442  * Make it an input with a pull up for all models.
443  * GPC9-15 LCD
444  */
445  __raw_writel(0xaaa80618, S3C2410_GPCCON);
446  __raw_writel(0x0000014c, S3C2410_GPCDAT);
447  __raw_writel(0x0000fef2, S3C2410_GPCUP);
448 
449  /* GPD0 input -- unknown function
450  * GPD1-D7 LCD
451  * GPD8 N30 output -- unknown function
452  * N35/PiN output 1=GPS LED on
453  * GPD9 output 0=power led blinks red, 1=normal power led function
454  * GPD10 output -- unknown function
455  * GPD11-15 LCD drivers
456  */
457  __raw_writel(0xaa95aaa4, S3C2410_GPDCON);
458  __raw_writel(0x00000601, S3C2410_GPDDAT);
459  __raw_writel(0x0000fbfe, S3C2410_GPDUP);
460 
461  /* GPE0-4 I2S audio bus
462  * GPE5-10 SD/MMC bus
463  * E11-13 outputs -- unknown function, probably power management
464  * E14-15 I2C bus connected to the battery controller
465  */
466  __raw_writel(0xa56aaaaa, S3C2410_GPECON);
467  __raw_writel(0x0000efc5, S3C2410_GPEDAT);
468  __raw_writel(0x0000f81f, S3C2410_GPEUP);
469 
470  /* GPF0 input 0=power button pressed
471  * GPF1 input SD/MMC switch 0=card present
472  * GPF2 N30 1=reset button pressed (inverted compared to the rest)
473  * N35/PiN 0=reset button pressed
474  * GPF3 N30/PiN input -- unknown function
475  * N35 input GPS antenna position, 0=antenna closed, 1=open
476  * GPF4 input 0=button 4 pressed
477  * GPF5 input 0=button 3 pressed
478  * GPF6 input 0=button 2 pressed
479  * GPF7 input 0=button 1 pressed
480  */
481  __raw_writel(0x0000aaaa, S3C2410_GPFCON);
482  __raw_writel(0x00000000, S3C2410_GPFDAT);
483  __raw_writel(0x000000ff, S3C2410_GPFUP);
484 
485  /* GPG0 input RS232 DCD/DSR/RI
486  * GPG1 input 1=USB gadget port has power from a host
487  * GPG2 N30 input -- unknown function
488  * N35/PiN input 0=headphones plugged in, 1=not plugged in
489  * GPG3 N30 output -- unknown function
490  * N35/PiN input with unknown function
491  * GPG4 N30 output 0=MMC enabled, 1=MMC disabled
492  * GPG5 N30 output 0=BlueTooth chip disabled, 1=enabled
493  * N35/PiN input joystick right
494  * GPG6 N30 output 0=blue led on, 1=off
495  * N35/PiN input joystick left
496  * GPG7 input 0=thumbwheel pressed
497  * GPG8 input 0=thumbwheel down
498  * GPG9 input 0=thumbwheel up
499  * GPG10 input SD/MMC write protect switch
500  * GPG11 N30 input -- unknown function
501  * N35 output 0=GPS antenna powered, 1=not powered
502  * PiN output -- unknown function
503  * GPG12-15 touch screen functions
504  *
505  * The pullups differ between the models, so enable all
506  * pullups that are enabled on any of the models.
507  */
508  if (machine_is_n30())
509  __raw_writel(0xff0a956a, S3C2410_GPGCON);
510  if (machine_is_n35())
511  __raw_writel(0xff4aa92a, S3C2410_GPGCON);
512  __raw_writel(0x0000e800, S3C2410_GPGDAT);
513  __raw_writel(0x0000f86f, S3C2410_GPGUP);
514 
515  /* GPH0/1/2/3 RS232 serial port
516  * GPH4/5 IrDA serial port
517  * GPH6/7 N30 BlueTooth serial port
518  * N35/PiN GPS receiver
519  * GPH8 input -- unknown function
520  * GPH9 CLKOUT0 HCLK -- unknown use
521  * GPH10 CLKOUT1 FCLK -- unknown use
522  *
523  * The pull ups for H6/H7 are enabled on N30 but not on the
524  * N35/PiN. I suppose is useful for a budget model of the N30
525  * with no bluetooh. It doesn't hurt to have the pull ups
526  * enabled on the N35, so leave them enabled for all models.
527  */
528  __raw_writel(0x0028aaaa, S3C2410_GPHCON);
529  __raw_writel(0x000005ef, S3C2410_GPHDAT);
530  __raw_writel(0x0000063f, S3C2410_GPHUP);
531 }
532 
533 static void __init n30_map_io(void)
534 {
535  s3c24xx_init_io(n30_iodesc, ARRAY_SIZE(n30_iodesc));
536  n30_hwinit();
537  s3c24xx_init_clocks(0);
538  s3c24xx_init_uarts(n30_uartcfgs, ARRAY_SIZE(n30_uartcfgs));
539 }
540 
541 /* GPB3 is the line that controls the pull-up for the USB D+ line */
542 
543 static void __init n30_init(void)
544 {
545  WARN_ON(gpio_request(S3C2410_GPG(4), "mmc power"));
546 
547  s3c24xx_fb_set_platdata(&n30_fb_info);
548  s3c24xx_udc_set_platdata(&n30_udc_cfg);
549  s3c24xx_mci_set_platdata(&n30_mci_cfg);
550  s3c_i2c0_set_platdata(&n30_i2ccfg);
551 
552  /* Turn off suspend on both USB ports, and switch the
553  * selectable USB port to USB device mode. */
554 
555  s3c2410_modify_misccr(S3C2410_MISCCR_USBHOST |
556  S3C2410_MISCCR_USBSUSPND0 |
557  S3C2410_MISCCR_USBSUSPND1, 0x0);
558 
559  if (machine_is_n30()) {
560  /* Turn off suspend on both USB ports, and switch the
561  * selectable USB port to USB device mode. */
562  s3c2410_modify_misccr(S3C2410_MISCCR_USBHOST |
563  S3C2410_MISCCR_USBSUSPND0 |
564  S3C2410_MISCCR_USBSUSPND1, 0x0);
565 
566  platform_add_devices(n30_devices, ARRAY_SIZE(n30_devices));
567  }
568 
569  if (machine_is_n35()) {
570  /* Turn off suspend and switch the selectable USB port
571  * to USB device mode. Turn on suspend for the host
572  * port since it is not connected on the N35.
573  *
574  * Actually, the host port is available at some pads
575  * on the back of the device, so it would actually be
576  * possible to add a USB device inside the N35 if you
577  * are willing to do some hardware modifications. */
578  s3c2410_modify_misccr(S3C2410_MISCCR_USBHOST |
579  S3C2410_MISCCR_USBSUSPND0 |
580  S3C2410_MISCCR_USBSUSPND1,
581  S3C2410_MISCCR_USBSUSPND0);
582 
583  platform_add_devices(n35_devices, ARRAY_SIZE(n35_devices));
584  }
585 }
586 
587 MACHINE_START(N30, "Acer-N30")
588  /* Maintainer: Christer Weinigel <[email protected]>,
589  Ben Dooks <[email protected]>
590  */
591  .atag_offset = 0x100,
592  .timer = &s3c24xx_timer,
593  .init_machine = n30_init,
594  .init_irq = s3c24xx_init_irq,
595  .map_io = n30_map_io,
596  .restart = s3c2410_restart,
597 MACHINE_END
598 
599 MACHINE_START(N35, "Acer-N35")
600  /* Maintainer: Christer Weinigel <[email protected]>
601  */
602  .atag_offset = 0x100,
603  .timer = &s3c24xx_timer,
604  .init_machine = n30_init,
605  .init_irq = s3c24xx_init_irq,
606  .map_io = n30_map_io,
607  .restart = s3c2410_restart,
608 MACHINE_END
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