1 // SPDX-License-Identifier: GPL-2.0
2 //
3 // mach-hmt.c - Platform code for Airgoo HMT
4 //
5 // Copyright 2009 Peter Korsgaard <jacmet@sunsite.dk>
6
7 #include <linux/kernel.h>
8 #include <linux/init.h>
9 #include <linux/serial_core.h>
10 #include <linux/serial_s3c.h>
11 #include <linux/platform_device.h>
12 #include <linux/io.h>
13 #include <linux/i2c.h>
14 #include <linux/fb.h>
15 #include <linux/gpio.h>
16 #include <linux/delay.h>
17 #include <linux/leds.h>
18 #include <linux/pwm.h>
19 #include <linux/pwm_backlight.h>
20 #include <linux/mtd/mtd.h>
21 #include <linux/mtd/partitions.h>
22
23 #include <asm/mach/arch.h>
24 #include <asm/mach/map.h>
25 #include <asm/mach/irq.h>
26
27 #include <video/samsung_fimd.h>
28 #include <mach/hardware.h>
29 #include <mach/map.h>
30 #include <mach/irqs.h>
31
32 #include <asm/irq.h>
33 #include <asm/mach-types.h>
34
35 #include <linux/platform_data/i2c-s3c2410.h>
36 #include <mach/gpio-samsung.h>
37 #include <plat/fb.h>
38 #include <linux/platform_data/mtd-nand-s3c2410.h>
39
40 #include <plat/devs.h>
41 #include <plat/cpu.h>
42 #include <plat/samsung-time.h>
43
44 #include "common.h"
45
46 #define UCON S3C2410_UCON_DEFAULT
47 #define ULCON (S3C2410_LCON_CS8 | S3C2410_LCON_PNONE)
48 #define UFCON (S3C2410_UFCON_RXTRIG8 | S3C2410_UFCON_FIFOMODE)
49
50 static struct s3c2410_uartcfg hmt_uartcfgs[] __initdata = {
51 [0] = {
52 .hwport = 0,
53 .flags = 0,
54 .ucon = UCON,
55 .ulcon = ULCON,
56 .ufcon = UFCON,
57 },
58 [1] = {
59 .hwport = 1,
60 .flags = 0,
61 .ucon = UCON,
62 .ulcon = ULCON,
63 .ufcon = UFCON,
64 },
65 [2] = {
66 .hwport = 2,
67 .flags = 0,
68 .ucon = UCON,
69 .ulcon = ULCON,
70 .ufcon = UFCON,
71 },
72 };
73
74 static struct pwm_lookup hmt_pwm_lookup[] = {
75 PWM_LOOKUP("samsung-pwm", 1, "pwm-backlight.0", NULL,
76 1000000000 / (100 * 256 * 20), PWM_POLARITY_NORMAL),
77 };
78
hmt_bl_init(struct device * dev)79 static int hmt_bl_init(struct device *dev)
80 {
81 int ret;
82
83 ret = gpio_request(S3C64XX_GPB(4), "lcd backlight enable");
84 if (!ret)
85 ret = gpio_direction_output(S3C64XX_GPB(4), 0);
86
87 return ret;
88 }
89
hmt_bl_notify(struct device * dev,int brightness)90 static int hmt_bl_notify(struct device *dev, int brightness)
91 {
92 /*
93 * translate from CIELUV/CIELAB L*->brightness, E.G. from
94 * perceived luminance to light output. Assumes range 0..25600
95 */
96 if (brightness < 0x800) {
97 /* Y = Yn * L / 903.3 */
98 brightness = (100*256 * brightness + 231245/2) / 231245;
99 } else {
100 /* Y = Yn * ((L + 16) / 116 )^3 */
101 int t = (brightness*4 + 16*1024 + 58)/116;
102 brightness = 25 * ((t * t * t + 0x100000/2) / 0x100000);
103 }
104
105 gpio_set_value(S3C64XX_GPB(4), brightness);
106
107 return brightness;
108 }
109
hmt_bl_exit(struct device * dev)110 static void hmt_bl_exit(struct device *dev)
111 {
112 gpio_free(S3C64XX_GPB(4));
113 }
114
115 static struct platform_pwm_backlight_data hmt_backlight_data = {
116 .max_brightness = 100 * 256,
117 .dft_brightness = 40 * 256,
118 .enable_gpio = -1,
119 .init = hmt_bl_init,
120 .notify = hmt_bl_notify,
121 .exit = hmt_bl_exit,
122
123 };
124
125 static struct platform_device hmt_backlight_device = {
126 .name = "pwm-backlight",
127 .dev = {
128 .parent = &samsung_device_pwm.dev,
129 .platform_data = &hmt_backlight_data,
130 },
131 };
132
133 static struct s3c_fb_pd_win hmt_fb_win0 = {
134 .max_bpp = 32,
135 .default_bpp = 16,
136 .xres = 800,
137 .yres = 480,
138 };
139
140 static struct fb_videomode hmt_lcd_timing = {
141 .left_margin = 8,
142 .right_margin = 13,
143 .upper_margin = 7,
144 .lower_margin = 5,
145 .hsync_len = 3,
146 .vsync_len = 1,
147 .xres = 800,
148 .yres = 480,
149 };
150
151 /* 405566 clocks per frame => 60Hz refresh requires 24333960Hz clock */
152 static struct s3c_fb_platdata hmt_lcd_pdata __initdata = {
153 .setup_gpio = s3c64xx_fb_gpio_setup_24bpp,
154 .vtiming = &hmt_lcd_timing,
155 .win[0] = &hmt_fb_win0,
156 .vidcon0 = VIDCON0_VIDOUT_RGB | VIDCON0_PNRMODE_RGB,
157 .vidcon1 = VIDCON1_INV_HSYNC | VIDCON1_INV_VSYNC,
158 };
159
160 static struct mtd_partition hmt_nand_part[] = {
161 [0] = {
162 .name = "uboot",
163 .size = SZ_512K,
164 .offset = 0,
165 },
166 [1] = {
167 .name = "uboot-env1",
168 .size = SZ_256K,
169 .offset = SZ_512K,
170 },
171 [2] = {
172 .name = "uboot-env2",
173 .size = SZ_256K,
174 .offset = SZ_512K + SZ_256K,
175 },
176 [3] = {
177 .name = "kernel",
178 .size = SZ_2M,
179 .offset = SZ_1M,
180 },
181 [4] = {
182 .name = "rootfs",
183 .size = MTDPART_SIZ_FULL,
184 .offset = SZ_1M + SZ_2M,
185 },
186 };
187
188 static struct s3c2410_nand_set hmt_nand_sets[] = {
189 [0] = {
190 .name = "nand",
191 .nr_chips = 1,
192 .nr_partitions = ARRAY_SIZE(hmt_nand_part),
193 .partitions = hmt_nand_part,
194 },
195 };
196
197 static struct s3c2410_platform_nand hmt_nand_info = {
198 .tacls = 25,
199 .twrph0 = 55,
200 .twrph1 = 40,
201 .nr_sets = ARRAY_SIZE(hmt_nand_sets),
202 .sets = hmt_nand_sets,
203 .ecc_mode = NAND_ECC_SOFT,
204 };
205
206 static struct gpio_led hmt_leds[] = {
207 { /* left function keys */
208 .name = "left:blue",
209 .gpio = S3C64XX_GPO(12),
210 .default_trigger = "default-on",
211 },
212 { /* right function keys - red */
213 .name = "right:red",
214 .gpio = S3C64XX_GPO(13),
215 },
216 { /* right function keys - green */
217 .name = "right:green",
218 .gpio = S3C64XX_GPO(14),
219 },
220 { /* right function keys - blue */
221 .name = "right:blue",
222 .gpio = S3C64XX_GPO(15),
223 .default_trigger = "default-on",
224 },
225 };
226
227 static struct gpio_led_platform_data hmt_led_data = {
228 .num_leds = ARRAY_SIZE(hmt_leds),
229 .leds = hmt_leds,
230 };
231
232 static struct platform_device hmt_leds_device = {
233 .name = "leds-gpio",
234 .id = -1,
235 .dev.platform_data = &hmt_led_data,
236 };
237
238 static struct map_desc hmt_iodesc[] = {};
239
240 static struct platform_device *hmt_devices[] __initdata = {
241 &s3c_device_i2c0,
242 &s3c_device_nand,
243 &s3c_device_fb,
244 &s3c_device_ohci,
245 &samsung_device_pwm,
246 &hmt_backlight_device,
247 &hmt_leds_device,
248 };
249
hmt_map_io(void)250 static void __init hmt_map_io(void)
251 {
252 s3c64xx_init_io(hmt_iodesc, ARRAY_SIZE(hmt_iodesc));
253 s3c64xx_set_xtal_freq(12000000);
254 s3c24xx_init_uarts(hmt_uartcfgs, ARRAY_SIZE(hmt_uartcfgs));
255 samsung_set_timer_source(SAMSUNG_PWM3, SAMSUNG_PWM4);
256 }
257
hmt_machine_init(void)258 static void __init hmt_machine_init(void)
259 {
260 s3c_i2c0_set_platdata(NULL);
261 s3c_fb_set_platdata(&hmt_lcd_pdata);
262 s3c_nand_set_platdata(&hmt_nand_info);
263
264 gpio_request(S3C64XX_GPC(7), "usb power");
265 gpio_direction_output(S3C64XX_GPC(7), 0);
266 gpio_request(S3C64XX_GPM(0), "usb power");
267 gpio_direction_output(S3C64XX_GPM(0), 1);
268 gpio_request(S3C64XX_GPK(7), "usb power");
269 gpio_direction_output(S3C64XX_GPK(7), 1);
270 gpio_request(S3C64XX_GPF(13), "usb power");
271 gpio_direction_output(S3C64XX_GPF(13), 1);
272
273 pwm_add_table(hmt_pwm_lookup, ARRAY_SIZE(hmt_pwm_lookup));
274 platform_add_devices(hmt_devices, ARRAY_SIZE(hmt_devices));
275 }
276
277 MACHINE_START(HMT, "Airgoo-HMT")
278 /* Maintainer: Peter Korsgaard <jacmet@sunsite.dk> */
279 .atag_offset = 0x100,
280 .nr_irqs = S3C64XX_NR_IRQS,
281 .init_irq = s3c6410_init_irq,
282 .map_io = hmt_map_io,
283 .init_machine = hmt_machine_init,
284 .init_time = samsung_timer_init,
285 .restart = s3c64xx_restart,
286 MACHINE_END
287