Merge tag '4.4-additional' of git://git.lwn.net/linux
[firefly-linux-kernel-4.4.55.git] / arch / arm / mach-s3c64xx / mach-smartq.c
1 /*
2  * linux/arch/arm/mach-s3c64xx/mach-smartq.c
3  *
4  * Copyright (C) 2010 Maurus Cuelenaere
5  *
6  * This program is free software; you can redistribute it and/or modify
7  * it under the terms of the GNU General Public License version 2 as
8  * published by the Free Software Foundation.
9  *
10  */
11
12 #include <linux/delay.h>
13 #include <linux/fb.h>
14 #include <linux/gpio.h>
15 #include <linux/init.h>
16 #include <linux/platform_device.h>
17 #include <linux/pwm.h>
18 #include <linux/pwm_backlight.h>
19 #include <linux/serial_core.h>
20 #include <linux/serial_s3c.h>
21 #include <linux/spi/spi_gpio.h>
22 #include <linux/usb/gpio_vbus.h>
23 #include <linux/platform_data/s3c-hsotg.h>
24
25 #include <asm/mach-types.h>
26 #include <asm/mach/map.h>
27
28 #include <mach/map.h>
29 #include <mach/regs-gpio.h>
30 #include <mach/gpio-samsung.h>
31
32 #include <plat/cpu.h>
33 #include <plat/devs.h>
34 #include <linux/platform_data/i2c-s3c2410.h>
35 #include <plat/gpio-cfg.h>
36 #include <linux/platform_data/hwmon-s3c.h>
37 #include <linux/platform_data/usb-ohci-s3c2410.h>
38 #include <plat/sdhci.h>
39 #include <linux/platform_data/touchscreen-s3c2410.h>
40
41 #include <video/platform_lcd.h>
42 #include <plat/samsung-time.h>
43
44 #include "common.h"
45 #include "regs-modem.h"
46
47 #define UCON S3C2410_UCON_DEFAULT
48 #define ULCON (S3C2410_LCON_CS8 | S3C2410_LCON_PNONE)
49 #define UFCON (S3C2410_UFCON_RXTRIG8 | S3C2410_UFCON_FIFOMODE)
50
51 static struct s3c2410_uartcfg smartq_uartcfgs[] __initdata = {
52         [0] = {
53                 .hwport      = 0,
54                 .flags       = 0,
55                 .ucon        = UCON,
56                 .ulcon       = ULCON,
57                 .ufcon       = UFCON,
58         },
59         [1] = {
60                 .hwport      = 1,
61                 .flags       = 0,
62                 .ucon        = UCON,
63                 .ulcon       = ULCON,
64                 .ufcon       = UFCON,
65         },
66         [2] = {
67                 .hwport      = 2,
68                 .flags       = 0,
69                 .ucon        = UCON,
70                 .ulcon       = ULCON,
71                 .ufcon       = UFCON,
72         },
73 };
74
75 static void smartq_usb_host_powercontrol(int port, int to)
76 {
77         pr_debug("%s(%d, %d)\n", __func__, port, to);
78
79         if (port == 0) {
80                 gpio_set_value(S3C64XX_GPL(0), to);
81                 gpio_set_value(S3C64XX_GPL(1), to);
82         }
83 }
84
85 static irqreturn_t smartq_usb_host_ocirq(int irq, void *pw)
86 {
87         struct s3c2410_hcd_info *info = pw;
88
89         if (gpio_get_value(S3C64XX_GPL(10)) == 0) {
90                 pr_debug("%s: over-current irq (oc detected)\n", __func__);
91                 s3c2410_usb_report_oc(info, 3);
92         } else {
93                 pr_debug("%s: over-current irq (oc cleared)\n", __func__);
94                 s3c2410_usb_report_oc(info, 0);
95         }
96
97         return IRQ_HANDLED;
98 }
99
100 static void smartq_usb_host_enableoc(struct s3c2410_hcd_info *info, int on)
101 {
102         int ret;
103
104         /* This isn't present on a SmartQ 5 board */
105         if (machine_is_smartq5())
106                 return;
107
108         if (on) {
109                 ret = request_irq(gpio_to_irq(S3C64XX_GPL(10)),
110                                   smartq_usb_host_ocirq,
111                                   IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING,
112                                   "USB host overcurrent", info);
113                 if (ret != 0)
114                         pr_err("failed to request usb oc irq: %d\n", ret);
115         } else {
116                 free_irq(gpio_to_irq(S3C64XX_GPL(10)), info);
117         }
118 }
119
120 static struct s3c2410_hcd_info smartq_usb_host_info = {
121         .port[0]        = {
122                 .flags  = S3C_HCDFLG_USED
123         },
124         .port[1]        = {
125                 .flags  = 0
126         },
127
128         .power_control  = smartq_usb_host_powercontrol,
129         .enable_oc      = smartq_usb_host_enableoc,
130 };
131
132 static struct gpio_vbus_mach_info smartq_usb_otg_vbus_pdata = {
133         .gpio_vbus              = S3C64XX_GPL(9),
134         .gpio_pullup            = -1,
135         .gpio_vbus_inverted     = true,
136 };
137
138 static struct platform_device smartq_usb_otg_vbus_dev = {
139         .name                   = "gpio-vbus",
140         .dev.platform_data      = &smartq_usb_otg_vbus_pdata,
141 };
142
143 static struct pwm_lookup smartq_pwm_lookup[] = {
144         PWM_LOOKUP("samsung-pwm", 1, "pwm-backlight.0", NULL,
145                    1000000000 / (1000 * 20), PWM_POLARITY_NORMAL),
146 };
147
148 static int smartq_bl_init(struct device *dev)
149 {
150     s3c_gpio_cfgpin(S3C64XX_GPF(15), S3C_GPIO_SFN(2));
151
152     return 0;
153 }
154
155 static struct platform_pwm_backlight_data smartq_backlight_data = {
156         .max_brightness = 1000,
157         .dft_brightness = 600,
158         .enable_gpio    = -1,
159         .init           = smartq_bl_init,
160 };
161
162 static struct platform_device smartq_backlight_device = {
163         .name           = "pwm-backlight",
164         .dev            = {
165                 .parent = &samsung_device_pwm.dev,
166                 .platform_data = &smartq_backlight_data,
167         },
168 };
169
170 static struct s3c2410_ts_mach_info smartq_touchscreen_pdata __initdata = {
171         .delay                  = 65535,
172         .presc                  = 99,
173         .oversampling_shift     = 4,
174 };
175
176 static struct s3c_sdhci_platdata smartq_internal_hsmmc_pdata = {
177         .max_width              = 4,
178         .cd_type                = S3C_SDHCI_CD_PERMANENT,
179 };
180
181 static struct s3c_hwmon_pdata smartq_hwmon_pdata __initdata = {
182         /* Battery voltage (?-4.2V) */
183         .in[0] = &(struct s3c_hwmon_chcfg) {
184                 .name           = "smartq:battery-voltage",
185                 .mult           = 3300,
186                 .div            = 2048,
187         },
188         /* Reference voltage (1.2V) */
189         .in[1] = &(struct s3c_hwmon_chcfg) {
190                 .name           = "smartq:reference-voltage",
191                 .mult           = 3300,
192                 .div            = 4096,
193         },
194 };
195
196 static struct dwc2_hsotg_plat smartq_hsotg_pdata;
197
198 static int __init smartq_lcd_setup_gpio(void)
199 {
200         int ret;
201
202         ret = gpio_request(S3C64XX_GPM(3), "LCD power");
203         if (ret < 0)
204                 return ret;
205
206         /* turn power off */
207         gpio_direction_output(S3C64XX_GPM(3), 0);
208
209         return 0;
210 }
211
212 /* GPM0 -> CS */
213 static struct spi_gpio_platform_data smartq_lcd_control = {
214         .sck                    = S3C64XX_GPM(1),
215         .mosi                   = S3C64XX_GPM(2),
216         .miso                   = S3C64XX_GPM(2),
217 };
218
219 static struct platform_device smartq_lcd_control_device = {
220         .name                   = "spi-gpio",
221         .id                     = 1,
222         .dev.platform_data      = &smartq_lcd_control,
223 };
224
225 static void smartq_lcd_power_set(struct plat_lcd_data *pd, unsigned int power)
226 {
227         gpio_direction_output(S3C64XX_GPM(3), power);
228 }
229
230 static struct plat_lcd_data smartq_lcd_power_data = {
231         .set_power      = smartq_lcd_power_set,
232 };
233
234 static struct platform_device smartq_lcd_power_device = {
235         .name                   = "platform-lcd",
236         .dev.parent             = &s3c_device_fb.dev,
237         .dev.platform_data      = &smartq_lcd_power_data,
238 };
239
240 static struct i2c_board_info smartq_i2c_devs[] __initdata = {
241         { I2C_BOARD_INFO("wm8987", 0x1a), },
242 };
243
244 static struct platform_device *smartq_devices[] __initdata = {
245         &s3c_device_hsmmc1,     /* Init iNAND first, ... */
246         &s3c_device_hsmmc0,     /* ... then the external SD card */
247         &s3c_device_hsmmc2,
248         &s3c_device_adc,
249         &s3c_device_fb,
250         &s3c_device_hwmon,
251         &s3c_device_i2c0,
252         &s3c_device_ohci,
253         &s3c_device_rtc,
254         &samsung_device_pwm,
255         &s3c_device_ts,
256         &s3c_device_usb_hsotg,
257         &s3c64xx_device_iis0,
258         &smartq_backlight_device,
259         &smartq_lcd_control_device,
260         &smartq_lcd_power_device,
261         &smartq_usb_otg_vbus_dev,
262 };
263
264 static void __init smartq_lcd_mode_set(void)
265 {
266         u32 tmp;
267
268         /* set the LCD type */
269         tmp = __raw_readl(S3C64XX_SPCON);
270         tmp &= ~S3C64XX_SPCON_LCD_SEL_MASK;
271         tmp |= S3C64XX_SPCON_LCD_SEL_RGB;
272         __raw_writel(tmp, S3C64XX_SPCON);
273
274         /* remove the LCD bypass */
275         tmp = __raw_readl(S3C64XX_MODEM_MIFPCON);
276         tmp &= ~MIFPCON_LCD_BYPASS;
277         __raw_writel(tmp, S3C64XX_MODEM_MIFPCON);
278 }
279
280 static void smartq_power_off(void)
281 {
282         gpio_direction_output(S3C64XX_GPK(15), 1);
283 }
284
285 static int __init smartq_power_off_init(void)
286 {
287         int ret;
288
289         ret = gpio_request(S3C64XX_GPK(15), "Power control");
290         if (ret < 0) {
291                 pr_err("%s: failed to get GPK15\n", __func__);
292                 return ret;
293         }
294
295         /* leave power on */
296         gpio_direction_output(S3C64XX_GPK(15), 0);
297
298         pm_power_off = smartq_power_off;
299
300         return ret;
301 }
302
303 static int __init smartq_usb_host_init(void)
304 {
305         int ret;
306
307         ret = gpio_request(S3C64XX_GPL(0), "USB power control");
308         if (ret < 0) {
309                 pr_err("%s: failed to get GPL0\n", __func__);
310                 return ret;
311         }
312
313         ret = gpio_request(S3C64XX_GPL(1), "USB host power control");
314         if (ret < 0) {
315                 pr_err("%s: failed to get GPL1\n", __func__);
316                 goto err;
317         }
318
319         if (!machine_is_smartq5()) {
320                 /* This isn't present on a SmartQ 5 board */
321                 ret = gpio_request(S3C64XX_GPL(10), "USB host overcurrent");
322                 if (ret < 0) {
323                         pr_err("%s: failed to get GPL10\n", __func__);
324                         goto err2;
325                 }
326         }
327
328         /* turn power off */
329         gpio_direction_output(S3C64XX_GPL(0), 0);
330         gpio_direction_output(S3C64XX_GPL(1), 0);
331         if (!machine_is_smartq5())
332                 gpio_direction_input(S3C64XX_GPL(10));
333
334         s3c_device_ohci.dev.platform_data = &smartq_usb_host_info;
335
336         return 0;
337
338 err2:
339         gpio_free(S3C64XX_GPL(1));
340 err:
341         gpio_free(S3C64XX_GPL(0));
342         return ret;
343 }
344
345 static int __init smartq_wifi_init(void)
346 {
347         int ret;
348
349         ret = gpio_request(S3C64XX_GPK(1), "wifi control");
350         if (ret < 0) {
351                 pr_err("%s: failed to get GPK1\n", __func__);
352                 return ret;
353         }
354
355         ret = gpio_request(S3C64XX_GPK(2), "wifi reset");
356         if (ret < 0) {
357                 pr_err("%s: failed to get GPK2\n", __func__);
358                 gpio_free(S3C64XX_GPK(1));
359                 return ret;
360         }
361
362         /* turn power on */
363         gpio_direction_output(S3C64XX_GPK(1), 1);
364
365         /* reset device */
366         gpio_direction_output(S3C64XX_GPK(2), 0);
367         mdelay(100);
368         gpio_set_value(S3C64XX_GPK(2), 1);
369         gpio_direction_input(S3C64XX_GPK(2));
370
371         return 0;
372 }
373
374 static struct map_desc smartq_iodesc[] __initdata = {};
375 void __init smartq_map_io(void)
376 {
377         s3c64xx_init_io(smartq_iodesc, ARRAY_SIZE(smartq_iodesc));
378         s3c64xx_set_xtal_freq(12000000);
379         s3c64xx_set_xusbxti_freq(12000000);
380         s3c24xx_init_uarts(smartq_uartcfgs, ARRAY_SIZE(smartq_uartcfgs));
381         samsung_set_timer_source(SAMSUNG_PWM3, SAMSUNG_PWM4);
382
383         smartq_lcd_mode_set();
384 }
385
386 void __init smartq_machine_init(void)
387 {
388         s3c_i2c0_set_platdata(NULL);
389         dwc2_hsotg_set_platdata(&smartq_hsotg_pdata);
390         s3c_hwmon_set_platdata(&smartq_hwmon_pdata);
391         s3c_sdhci1_set_platdata(&smartq_internal_hsmmc_pdata);
392         s3c_sdhci2_set_platdata(&smartq_internal_hsmmc_pdata);
393         s3c24xx_ts_set_platdata(&smartq_touchscreen_pdata);
394
395         i2c_register_board_info(0, smartq_i2c_devs,
396                                 ARRAY_SIZE(smartq_i2c_devs));
397
398         WARN_ON(smartq_lcd_setup_gpio());
399         WARN_ON(smartq_power_off_init());
400         WARN_ON(smartq_usb_host_init());
401         WARN_ON(smartq_wifi_init());
402
403         pwm_add_table(smartq_pwm_lookup, ARRAY_SIZE(smartq_pwm_lookup));
404         platform_add_devices(smartq_devices, ARRAY_SIZE(smartq_devices));
405 }