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Linux/arch/arm/mach-s3c24xx/mach-n30.c

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  1 // SPDX-License-Identifier: GPL-2.0
  2 //
  3 // Machine specific code for the Acer n30, Acer N35, Navman PiN 570,
  4 // Yakumo AlphaX and Airis NC05 PDAs.
  5 //
  6 // Copyright (c) 2003-2005 Simtec Electronics
  7 //      Ben Dooks <ben@simtec.co.uk>
  8 //
  9 // Copyright (c) 2005-2008 Christer Weinigel <christer@weinigel.se>
 10 //
 11 // There is a wiki with more information about the n30 port at
 12 // http://handhelds.org/moin/moin.cgi/AcerN30Documentation .
 13 
 14 #include <linux/kernel.h>
 15 #include <linux/types.h>
 16 
 17 #include <linux/gpio_keys.h>
 18 #include <linux/init.h>
 19 #include <linux/gpio.h>
 20 #include <linux/gpio/machine.h>
 21 #include <linux/input.h>
 22 #include <linux/interrupt.h>
 23 #include <linux/platform_device.h>
 24 #include <linux/serial_core.h>
 25 #include <linux/serial_s3c.h>
 26 #include <linux/timer.h>
 27 #include <linux/io.h>
 28 #include <linux/mmc/host.h>
 29 
 30 #include <mach/hardware.h>
 31 #include <asm/irq.h>
 32 #include <asm/mach-types.h>
 33 
 34 #include <mach/fb.h>
 35 #include <linux/platform_data/leds-s3c24xx.h>
 36 #include <mach/regs-gpio.h>
 37 #include <mach/regs-lcd.h>
 38 #include <mach/gpio-samsung.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 
 46 #include <plat/cpu.h>
 47 #include <plat/devs.h>
 48 #include <linux/platform_data/mmc-s3cmci.h>
 49 #include <linux/platform_data/usb-s3c2410_udc.h>
 50 #include <plat/samsung-time.h>
 51 
 52 #include "common.h"
 53 
 54 static struct map_desc n30_iodesc[] __initdata = {
 55         /* nothing here yet */
 56 };
 57 
 58 static struct s3c2410_uartcfg n30_uartcfgs[] = {
 59         /* Normal serial port */
 60         [0] = {
 61                 .hwport      = 0,
 62                 .flags       = 0,
 63                 .ucon        = 0x2c5,
 64                 .ulcon       = 0x03,
 65                 .ufcon       = 0x51,
 66         },
 67         /* IR port */
 68         [1] = {
 69                 .hwport      = 1,
 70                 .flags       = 0,
 71                 .uart_flags  = UPF_CONS_FLOW,
 72                 .ucon        = 0x2c5,
 73                 .ulcon       = 0x43,
 74                 .ufcon       = 0x51,
 75         },
 76         /* On the N30 the bluetooth controller is connected here.
 77          * On the N35 and variants the GPS receiver is connected here. */
 78         [2] = {
 79                 .hwport      = 2,
 80                 .flags       = 0,
 81                 .ucon        = 0x2c5,
 82                 .ulcon       = 0x03,
 83                 .ufcon       = 0x51,
 84         },
 85 };
 86 
 87 static struct s3c2410_udc_mach_info n30_udc_cfg __initdata = {
 88         .vbus_pin               = S3C2410_GPG(1),
 89         .vbus_pin_inverted      = 0,
 90         .pullup_pin             = S3C2410_GPB(3),
 91 };
 92 
 93 static struct gpio_keys_button n30_buttons[] = {
 94         {
 95                 .gpio           = S3C2410_GPF(0),
 96                 .code           = KEY_POWER,
 97                 .desc           = "Power",
 98                 .active_low     = 0,
 99         },
100         {
101                 .gpio           = S3C2410_GPG(9),
102                 .code           = KEY_UP,
103                 .desc           = "Thumbwheel Up",
104                 .active_low     = 0,
105         },
106         {
107                 .gpio           = S3C2410_GPG(8),
108                 .code           = KEY_DOWN,
109                 .desc           = "Thumbwheel Down",
110                 .active_low     = 0,
111         },
112         {
113                 .gpio           = S3C2410_GPG(7),
114                 .code           = KEY_ENTER,
115                 .desc           = "Thumbwheel Press",
116                 .active_low     = 0,
117         },
118         {
119                 .gpio           = S3C2410_GPF(7),
120                 .code           = KEY_HOMEPAGE,
121                 .desc           = "Home",
122                 .active_low     = 0,
123         },
124         {
125                 .gpio           = S3C2410_GPF(6),
126                 .code           = KEY_CALENDAR,
127                 .desc           = "Calendar",
128                 .active_low     = 0,
129         },
130         {
131                 .gpio           = S3C2410_GPF(5),
132                 .code           = KEY_ADDRESSBOOK,
133                 .desc           = "Contacts",
134                 .active_low     = 0,
135         },
136         {
137                 .gpio           = S3C2410_GPF(4),
138                 .code           = KEY_MAIL,
139                 .desc           = "Mail",
140                 .active_low     = 0,
141         },
142 };
143 
144 static struct gpio_keys_platform_data n30_button_data = {
145         .buttons        = n30_buttons,
146         .nbuttons       = ARRAY_SIZE(n30_buttons),
147 };
148 
149 static struct platform_device n30_button_device = {
150         .name           = "gpio-keys",
151         .id             = -1,
152         .dev            = {
153                 .platform_data  = &n30_button_data,
154         }
155 };
156 
157 static struct gpio_keys_button n35_buttons[] = {
158         {
159                 .gpio           = S3C2410_GPF(0),
160                 .code           = KEY_POWER,
161                 .type           = EV_PWR,
162                 .desc           = "Power",
163                 .active_low     = 0,
164                 .wakeup         = 1,
165         },
166         {
167                 .gpio           = S3C2410_GPG(9),
168                 .code           = KEY_UP,
169                 .desc           = "Joystick Up",
170                 .active_low     = 0,
171         },
172         {
173                 .gpio           = S3C2410_GPG(8),
174                 .code           = KEY_DOWN,
175                 .desc           = "Joystick Down",
176                 .active_low     = 0,
177         },
178         {
179                 .gpio           = S3C2410_GPG(6),
180                 .code           = KEY_DOWN,
181                 .desc           = "Joystick Left",
182                 .active_low     = 0,
183         },
184         {
185                 .gpio           = S3C2410_GPG(5),
186                 .code           = KEY_DOWN,
187                 .desc           = "Joystick Right",
188                 .active_low     = 0,
189         },
190         {
191                 .gpio           = S3C2410_GPG(7),
192                 .code           = KEY_ENTER,
193                 .desc           = "Joystick Press",
194                 .active_low     = 0,
195         },
196         {
197                 .gpio           = S3C2410_GPF(7),
198                 .code           = KEY_HOMEPAGE,
199                 .desc           = "Home",
200                 .active_low     = 0,
201         },
202         {
203                 .gpio           = S3C2410_GPF(6),
204                 .code           = KEY_CALENDAR,
205                 .desc           = "Calendar",
206                 .active_low     = 0,
207         },
208         {
209                 .gpio           = S3C2410_GPF(5),
210                 .code           = KEY_ADDRESSBOOK,
211                 .desc           = "Contacts",
212                 .active_low     = 0,
213         },
214         {
215                 .gpio           = S3C2410_GPF(4),
216                 .code           = KEY_MAIL,
217                 .desc           = "Mail",
218                 .active_low     = 0,
219         },
220         {
221                 .gpio           = S3C2410_GPF(3),
222                 .code           = SW_RADIO,
223                 .desc           = "GPS Antenna",
224                 .active_low     = 0,
225         },
226         {
227                 .gpio           = S3C2410_GPG(2),
228                 .code           = SW_HEADPHONE_INSERT,
229                 .desc           = "Headphone",
230                 .active_low     = 0,
231         },
232 };
233 
234 static struct gpio_keys_platform_data n35_button_data = {
235         .buttons        = n35_buttons,
236         .nbuttons       = ARRAY_SIZE(n35_buttons),
237 };
238 
239 static struct platform_device n35_button_device = {
240         .name           = "gpio-keys",
241         .id             = -1,
242         .num_resources  = 0,
243         .dev            = {
244                 .platform_data  = &n35_button_data,
245         }
246 };
247 
248 /* This is the bluetooth LED on the device. */
249 static struct s3c24xx_led_platdata n30_blue_led_pdata = {
250         .name           = "blue_led",
251         .gpio           = S3C2410_GPG(6),
252         .def_trigger    = "",
253 };
254 
255 /* This is the blue LED on the device. Originally used to indicate GPS activity
256  * by flashing. */
257 static struct s3c24xx_led_platdata n35_blue_led_pdata = {
258         .name           = "blue_led",
259         .gpio           = S3C2410_GPD(8),
260         .def_trigger    = "",
261 };
262 
263 /* This LED is driven by the battery microcontroller, and is blinking
264  * red, blinking green or solid green when the battery is low,
265  * charging or full respectively.  By driving GPD9 low, it's possible
266  * to force the LED to blink red, so call that warning LED.  */
267 static struct s3c24xx_led_platdata n30_warning_led_pdata = {
268         .name           = "warning_led",
269         .flags          = S3C24XX_LEDF_ACTLOW,
270         .gpio           = S3C2410_GPD(9),
271         .def_trigger    = "",
272 };
273 
274 static struct s3c24xx_led_platdata n35_warning_led_pdata = {
275         .name           = "warning_led",
276         .flags          = S3C24XX_LEDF_ACTLOW | S3C24XX_LEDF_TRISTATE,
277         .gpio           = S3C2410_GPD(9),
278         .def_trigger    = "",
279 };
280 
281 static struct platform_device n30_blue_led = {
282         .name           = "s3c24xx_led",
283         .id             = 1,
284         .dev            = {
285                 .platform_data  = &n30_blue_led_pdata,
286         },
287 };
288 
289 static struct platform_device n35_blue_led = {
290         .name           = "s3c24xx_led",
291         .id             = 1,
292         .dev            = {
293                 .platform_data  = &n35_blue_led_pdata,
294         },
295 };
296 
297 static struct platform_device n30_warning_led = {
298         .name           = "s3c24xx_led",
299         .id             = 2,
300         .dev            = {
301                 .platform_data  = &n30_warning_led_pdata,
302         },
303 };
304 
305 static struct platform_device n35_warning_led = {
306         .name           = "s3c24xx_led",
307         .id             = 2,
308         .dev            = {
309                 .platform_data  = &n35_warning_led_pdata,
310         },
311 };
312 
313 static struct s3c2410fb_display n30_display __initdata = {
314         .type           = S3C2410_LCDCON1_TFT,
315         .width          = 240,
316         .height         = 320,
317         .pixclock       = 170000,
318 
319         .xres           = 240,
320         .yres           = 320,
321         .bpp            = 16,
322         .left_margin    = 3,
323         .right_margin   = 40,
324         .hsync_len      = 40,
325         .upper_margin   = 2,
326         .lower_margin   = 3,
327         .vsync_len      = 2,
328 
329         .lcdcon5 = S3C2410_LCDCON5_INVVLINE | S3C2410_LCDCON5_INVVFRAME,
330 };
331 
332 static struct s3c2410fb_mach_info n30_fb_info __initdata = {
333         .displays       = &n30_display,
334         .num_displays   = 1,
335         .default_display = 0,
336         .lpcsel         = 0x06,
337 };
338 
339 static void n30_sdi_set_power(unsigned char power_mode, unsigned short vdd)
340 {
341         switch (power_mode) {
342         case MMC_POWER_ON:
343         case MMC_POWER_UP:
344                 gpio_set_value(S3C2410_GPG(4), 1);
345                 break;
346         case MMC_POWER_OFF:
347         default:
348                 gpio_set_value(S3C2410_GPG(4), 0);
349                 break;
350         }
351 }
352 
353 static struct s3c24xx_mci_pdata n30_mci_cfg __initdata = {
354         .ocr_avail      = MMC_VDD_32_33,
355         .set_power      = n30_sdi_set_power,
356 };
357 
358 static struct gpiod_lookup_table n30_mci_gpio_table = {
359         .dev_id = "s3c2410-sdi",
360         .table = {
361                 /* Card detect S3C2410_GPF(1) */
362                 GPIO_LOOKUP("GPF", 1, "cd", GPIO_ACTIVE_LOW),
363                 /* Write protect S3C2410_GPG(10) */
364                 GPIO_LOOKUP("GPG", 10, "wp", GPIO_ACTIVE_LOW),
365                 { },
366         },
367 };
368 
369 static struct platform_device *n30_devices[] __initdata = {
370         &s3c_device_lcd,
371         &s3c_device_wdt,
372         &s3c_device_i2c0,
373         &s3c_device_iis,
374         &s3c_device_ohci,
375         &s3c_device_rtc,
376         &s3c_device_usbgadget,
377         &s3c_device_sdi,
378         &n30_button_device,
379         &n30_blue_led,
380         &n30_warning_led,
381 };
382 
383 static struct platform_device *n35_devices[] __initdata = {
384         &s3c_device_lcd,
385         &s3c_device_wdt,
386         &s3c_device_i2c0,
387         &s3c_device_iis,
388         &s3c_device_rtc,
389         &s3c_device_usbgadget,
390         &s3c_device_sdi,
391         &n35_button_device,
392         &n35_blue_led,
393         &n35_warning_led,
394 };
395 
396 static struct s3c2410_platform_i2c __initdata n30_i2ccfg = {
397         .flags          = 0,
398         .slave_addr     = 0x10,
399         .frequency      = 10*1000,
400 };
401 
402 /* Lots of hardcoded stuff, but it sets up the hardware in a useful
403  * state so that we can boot Linux directly from flash. */
404 static void __init n30_hwinit(void)
405 {
406         /* GPA0-11 special functions -- unknown what they do
407          * GPA12 N30 special function -- unknown what it does
408          *       N35/PiN output -- unknown what it does
409          *
410          * A12 is nGCS1 on the N30 and an output on the N35/PiN.  I
411          * don't think it does anything useful on the N30, so I ought
412          * to make it an output there too since it always driven to 0
413          * as far as I can tell. */
414         if (machine_is_n30())
415                 __raw_writel(0x007fffff, S3C2410_GPACON);
416         if (machine_is_n35())
417                 __raw_writel(0x007fefff, S3C2410_GPACON);
418         __raw_writel(0x00000000, S3C2410_GPADAT);
419 
420         /* GPB0 TOUT0 backlight level
421          * GPB1 output 1=backlight on
422          * GPB2 output IrDA enable 0=transceiver enabled, 1=disabled
423          * GPB3 output USB D+ pull up 0=disabled, 1=enabled
424          * GPB4 N30 output -- unknown function
425          *      N30/PiN GPS control 0=GPS enabled, 1=GPS disabled
426          * GPB5 output -- unknown function
427          * GPB6 input -- unknown function
428          * GPB7 output -- unknown function
429          * GPB8 output -- probably LCD driver enable
430          * GPB9 output -- probably LCD VSYNC driver enable
431          * GPB10 output -- probably LCD HSYNC driver enable
432          */
433         __raw_writel(0x00154556, S3C2410_GPBCON);
434         __raw_writel(0x00000750, S3C2410_GPBDAT);
435         __raw_writel(0x00000073, S3C2410_GPBUP);
436 
437         /* GPC0 input RS232 DCD/DSR/RI
438          * GPC1 LCD
439          * GPC2 output RS232 DTR?
440          * GPC3 input RS232 DCD/DSR/RI
441          * GPC4 LCD
442          * GPC5 output 0=NAND write enabled, 1=NAND write protect
443          * GPC6 input -- unknown function
444          * GPC7 input charger status 0=charger connected
445          *      this input can be triggered by power on the USB device
446          *      port too, but will go back to disconnected soon after.
447          * GPC8 N30/N35 output -- unknown function, always driven to 1
448          *      PiN input -- unknown function, always read as 1
449          *      Make it an input with a pull up for all models.
450          * GPC9-15 LCD
451          */
452         __raw_writel(0xaaa80618, S3C2410_GPCCON);
453         __raw_writel(0x0000014c, S3C2410_GPCDAT);
454         __raw_writel(0x0000fef2, S3C2410_GPCUP);
455 
456         /* GPD0 input -- unknown function
457          * GPD1-D7 LCD
458          * GPD8 N30 output -- unknown function
459          *      N35/PiN output 1=GPS LED on
460          * GPD9 output 0=power led blinks red, 1=normal power led function
461          * GPD10 output -- unknown function
462          * GPD11-15 LCD drivers
463          */
464         __raw_writel(0xaa95aaa4, S3C2410_GPDCON);
465         __raw_writel(0x00000601, S3C2410_GPDDAT);
466         __raw_writel(0x0000fbfe, S3C2410_GPDUP);
467 
468         /* GPE0-4 I2S audio bus
469          * GPE5-10 SD/MMC bus
470          * E11-13 outputs -- unknown function, probably power management
471          * E14-15 I2C bus connected to the battery controller
472          */
473         __raw_writel(0xa56aaaaa, S3C2410_GPECON);
474         __raw_writel(0x0000efc5, S3C2410_GPEDAT);
475         __raw_writel(0x0000f81f, S3C2410_GPEUP);
476 
477         /* GPF0  input 0=power button pressed
478          * GPF1  input SD/MMC switch 0=card present
479          * GPF2  N30 1=reset button pressed (inverted compared to the rest)
480          *       N35/PiN 0=reset button pressed
481          * GPF3  N30/PiN input -- unknown function
482          *       N35 input GPS antenna position, 0=antenna closed, 1=open
483          * GPF4  input 0=button 4 pressed
484          * GPF5  input 0=button 3 pressed
485          * GPF6  input 0=button 2 pressed
486          * GPF7  input 0=button 1 pressed
487          */
488         __raw_writel(0x0000aaaa, S3C2410_GPFCON);
489         __raw_writel(0x00000000, S3C2410_GPFDAT);
490         __raw_writel(0x000000ff, S3C2410_GPFUP);
491 
492         /* GPG0  input RS232 DCD/DSR/RI
493          * GPG1  input 1=USB gadget port has power from a host
494          * GPG2  N30 input -- unknown function
495          *       N35/PiN input 0=headphones plugged in, 1=not plugged in
496          * GPG3  N30 output -- unknown function
497          *       N35/PiN input with unknown function
498          * GPG4  N30 output 0=MMC enabled, 1=MMC disabled
499          * GPG5  N30 output 0=BlueTooth chip disabled, 1=enabled
500          *       N35/PiN input joystick right
501          * GPG6  N30 output 0=blue led on, 1=off
502          *       N35/PiN input joystick left
503          * GPG7  input 0=thumbwheel pressed
504          * GPG8  input 0=thumbwheel down
505          * GPG9  input 0=thumbwheel up
506          * GPG10 input SD/MMC write protect switch
507          * GPG11 N30 input -- unknown function
508          *       N35 output 0=GPS antenna powered, 1=not powered
509          *       PiN output -- unknown function
510          * GPG12-15 touch screen functions
511          *
512          * The pullups differ between the models, so enable all
513          * pullups that are enabled on any of the models.
514          */
515         if (machine_is_n30())
516                 __raw_writel(0xff0a956a, S3C2410_GPGCON);
517         if (machine_is_n35())
518                 __raw_writel(0xff4aa92a, S3C2410_GPGCON);
519         __raw_writel(0x0000e800, S3C2410_GPGDAT);
520         __raw_writel(0x0000f86f, S3C2410_GPGUP);
521 
522         /* GPH0/1/2/3 RS232 serial port
523          * GPH4/5 IrDA serial port
524          * GPH6/7  N30 BlueTooth serial port
525          *         N35/PiN GPS receiver
526          * GPH8 input -- unknown function
527          * GPH9 CLKOUT0 HCLK -- unknown use
528          * GPH10 CLKOUT1 FCLK -- unknown use
529          *
530          * The pull ups for H6/H7 are enabled on N30 but not on the
531          * N35/PiN.  I suppose is useful for a budget model of the N30
532          * with no bluetooth.  It doesn't hurt to have the pull ups
533          * enabled on the N35, so leave them enabled for all models.
534          */
535         __raw_writel(0x0028aaaa, S3C2410_GPHCON);
536         __raw_writel(0x000005ef, S3C2410_GPHDAT);
537         __raw_writel(0x0000063f, S3C2410_GPHUP);
538 }
539 
540 static void __init n30_map_io(void)
541 {
542         s3c24xx_init_io(n30_iodesc, ARRAY_SIZE(n30_iodesc));
543         n30_hwinit();
544         s3c24xx_init_uarts(n30_uartcfgs, ARRAY_SIZE(n30_uartcfgs));
545         samsung_set_timer_source(SAMSUNG_PWM3, SAMSUNG_PWM4);
546 }
547 
548 static void __init n30_init_time(void)
549 {
550         s3c2410_init_clocks(12000000);
551         samsung_timer_init();
552 }
553 
554 /* GPB3 is the line that controls the pull-up for the USB D+ line */
555 
556 static void __init n30_init(void)
557 {
558         WARN_ON(gpio_request(S3C2410_GPG(4), "mmc power"));
559 
560         s3c24xx_fb_set_platdata(&n30_fb_info);
561         s3c24xx_udc_set_platdata(&n30_udc_cfg);
562         gpiod_add_lookup_table(&n30_mci_gpio_table);
563         s3c24xx_mci_set_platdata(&n30_mci_cfg);
564         s3c_i2c0_set_platdata(&n30_i2ccfg);
565 
566         /* Turn off suspend on both USB ports, and switch the
567          * selectable USB port to USB device mode. */
568 
569         s3c2410_modify_misccr(S3C2410_MISCCR_USBHOST |
570                               S3C2410_MISCCR_USBSUSPND0 |
571                               S3C2410_MISCCR_USBSUSPND1, 0x0);
572 
573         if (machine_is_n30()) {
574                 /* Turn off suspend on both USB ports, and switch the
575                  * selectable USB port to USB device mode. */
576                 s3c2410_modify_misccr(S3C2410_MISCCR_USBHOST |
577                                       S3C2410_MISCCR_USBSUSPND0 |
578                                       S3C2410_MISCCR_USBSUSPND1, 0x0);
579 
580                 platform_add_devices(n30_devices, ARRAY_SIZE(n30_devices));
581         }
582 
583         if (machine_is_n35()) {
584                 /* Turn off suspend and switch the selectable USB port
585                  * to USB device mode.  Turn on suspend for the host
586                  * port since it is not connected on the N35.
587                  *
588                  * Actually, the host port is available at some pads
589                  * on the back of the device, so it would actually be
590                  * possible to add a USB device inside the N35 if you
591                  * are willing to do some hardware modifications. */
592                 s3c2410_modify_misccr(S3C2410_MISCCR_USBHOST |
593                                       S3C2410_MISCCR_USBSUSPND0 |
594                                       S3C2410_MISCCR_USBSUSPND1,
595                                       S3C2410_MISCCR_USBSUSPND0);
596 
597                 platform_add_devices(n35_devices, ARRAY_SIZE(n35_devices));
598         }
599 }
600 
601 MACHINE_START(N30, "Acer-N30")
602         /* Maintainer: Christer Weinigel <christer@weinigel.se>,
603                                 Ben Dooks <ben-linux@fluff.org>
604         */
605         .atag_offset    = 0x100,
606         .init_time      = n30_init_time,
607         .init_machine   = n30_init,
608         .init_irq       = s3c2410_init_irq,
609         .map_io         = n30_map_io,
610 MACHINE_END
611 
612 MACHINE_START(N35, "Acer-N35")
613         /* Maintainer: Christer Weinigel <christer@weinigel.se>
614         */
615         .atag_offset    = 0x100,
616         .init_time      = n30_init_time,
617         .init_machine   = n30_init,
618         .init_irq       = s3c2410_init_irq,
619         .map_io         = n30_map_io,
620 MACHINE_END
621 

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