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 "map.h"
29 #include "irqs.h"
30
31 #include <asm/irq.h>
32 #include <asm/mach-types.h>
33
34 #include <linux/platform_data/i2c-s3c2410.h>
35 #include "gpio-samsung.h"
36 #include "fb.h"
37 #include <linux/platform_data/mtd-nand-s3c2410.h>
38
39 #include "devs.h"
40 #include "cpu.h"
41
42 #include "s3c64xx.h"
43
44 #define UCON S3C2410_UCON_DEFAULT
45 #define ULCON (S3C2410_LCON_CS8 | S3C2410_LCON_PNONE)
46 #define UFCON (S3C2410_UFCON_RXTRIG8 | S3C2410_UFCON_FIFOMODE)
47
48 static struct s3c2410_uartcfg hmt_uartcfgs[] __initdata = {
49 [0] = {
50 .hwport = 0,
51 .flags = 0,
52 .ucon = UCON,
53 .ulcon = ULCON,
54 .ufcon = UFCON,
55 },
56 [1] = {
57 .hwport = 1,
58 .flags = 0,
59 .ucon = UCON,
60 .ulcon = ULCON,
61 .ufcon = UFCON,
62 },
63 [2] = {
64 .hwport = 2,
65 .flags = 0,
66 .ucon = UCON,
67 .ulcon = ULCON,
68 .ufcon = UFCON,
69 },
70 };
71
72 static struct pwm_lookup hmt_pwm_lookup[] = {
73 PWM_LOOKUP("samsung-pwm", 1, "pwm-backlight.0", NULL,
74 1000000000 / (100 * 256 * 20), PWM_POLARITY_NORMAL),
75 };
76
hmt_bl_init(struct device * dev)77 static int hmt_bl_init(struct device *dev)
78 {
79 int ret;
80
81 ret = gpio_request(S3C64XX_GPB(4), "lcd backlight enable");
82 if (!ret)
83 ret = gpio_direction_output(S3C64XX_GPB(4), 0);
84
85 return ret;
86 }
87
hmt_bl_notify(struct device * dev,int brightness)88 static int hmt_bl_notify(struct device *dev, int brightness)
89 {
90 /*
91 * translate from CIELUV/CIELAB L*->brightness, E.G. from
92 * perceived luminance to light output. Assumes range 0..25600
93 */
94 if (brightness < 0x800) {
95 /* Y = Yn * L / 903.3 */
96 brightness = (100*256 * brightness + 231245/2) / 231245;
97 } else {
98 /* Y = Yn * ((L + 16) / 116 )^3 */
99 int t = (brightness*4 + 16*1024 + 58)/116;
100 brightness = 25 * ((t * t * t + 0x100000/2) / 0x100000);
101 }
102
103 gpio_set_value(S3C64XX_GPB(4), brightness);
104
105 return brightness;
106 }
107
hmt_bl_exit(struct device * dev)108 static void hmt_bl_exit(struct device *dev)
109 {
110 gpio_free(S3C64XX_GPB(4));
111 }
112
113 static struct platform_pwm_backlight_data hmt_backlight_data = {
114 .max_brightness = 100 * 256,
115 .dft_brightness = 40 * 256,
116 .init = hmt_bl_init,
117 .notify = hmt_bl_notify,
118 .exit = hmt_bl_exit,
119
120 };
121
122 static struct platform_device hmt_backlight_device = {
123 .name = "pwm-backlight",
124 .dev = {
125 .parent = &samsung_device_pwm.dev,
126 .platform_data = &hmt_backlight_data,
127 },
128 };
129
130 static struct s3c_fb_pd_win hmt_fb_win0 = {
131 .max_bpp = 32,
132 .default_bpp = 16,
133 .xres = 800,
134 .yres = 480,
135 };
136
137 static struct fb_videomode hmt_lcd_timing = {
138 .left_margin = 8,
139 .right_margin = 13,
140 .upper_margin = 7,
141 .lower_margin = 5,
142 .hsync_len = 3,
143 .vsync_len = 1,
144 .xres = 800,
145 .yres = 480,
146 };
147
148 /* 405566 clocks per frame => 60Hz refresh requires 24333960Hz clock */
149 static struct s3c_fb_platdata hmt_lcd_pdata __initdata = {
150 .setup_gpio = s3c64xx_fb_gpio_setup_24bpp,
151 .vtiming = &hmt_lcd_timing,
152 .win[0] = &hmt_fb_win0,
153 .vidcon0 = VIDCON0_VIDOUT_RGB | VIDCON0_PNRMODE_RGB,
154 .vidcon1 = VIDCON1_INV_HSYNC | VIDCON1_INV_VSYNC,
155 };
156
157 static struct mtd_partition hmt_nand_part[] = {
158 [0] = {
159 .name = "uboot",
160 .size = SZ_512K,
161 .offset = 0,
162 },
163 [1] = {
164 .name = "uboot-env1",
165 .size = SZ_256K,
166 .offset = SZ_512K,
167 },
168 [2] = {
169 .name = "uboot-env2",
170 .size = SZ_256K,
171 .offset = SZ_512K + SZ_256K,
172 },
173 [3] = {
174 .name = "kernel",
175 .size = SZ_2M,
176 .offset = SZ_1M,
177 },
178 [4] = {
179 .name = "rootfs",
180 .size = MTDPART_SIZ_FULL,
181 .offset = SZ_1M + SZ_2M,
182 },
183 };
184
185 static struct s3c2410_nand_set hmt_nand_sets[] = {
186 [0] = {
187 .name = "nand",
188 .nr_chips = 1,
189 .nr_partitions = ARRAY_SIZE(hmt_nand_part),
190 .partitions = hmt_nand_part,
191 },
192 };
193
194 static struct s3c2410_platform_nand hmt_nand_info = {
195 .tacls = 25,
196 .twrph0 = 55,
197 .twrph1 = 40,
198 .nr_sets = ARRAY_SIZE(hmt_nand_sets),
199 .sets = hmt_nand_sets,
200 .engine_type = NAND_ECC_ENGINE_TYPE_SOFT,
201 };
202
203 static struct gpio_led hmt_leds[] = {
204 { /* left function keys */
205 .name = "left:blue",
206 .gpio = S3C64XX_GPO(12),
207 .default_trigger = "default-on",
208 },
209 { /* right function keys - red */
210 .name = "right:red",
211 .gpio = S3C64XX_GPO(13),
212 },
213 { /* right function keys - green */
214 .name = "right:green",
215 .gpio = S3C64XX_GPO(14),
216 },
217 { /* right function keys - blue */
218 .name = "right:blue",
219 .gpio = S3C64XX_GPO(15),
220 .default_trigger = "default-on",
221 },
222 };
223
224 static struct gpio_led_platform_data hmt_led_data = {
225 .num_leds = ARRAY_SIZE(hmt_leds),
226 .leds = hmt_leds,
227 };
228
229 static struct platform_device hmt_leds_device = {
230 .name = "leds-gpio",
231 .id = -1,
232 .dev.platform_data = &hmt_led_data,
233 };
234
235 static struct map_desc hmt_iodesc[] = {};
236
237 static struct platform_device *hmt_devices[] __initdata = {
238 &s3c_device_i2c0,
239 &s3c_device_nand,
240 &s3c_device_fb,
241 &s3c_device_ohci,
242 &samsung_device_pwm,
243 &hmt_backlight_device,
244 &hmt_leds_device,
245 };
246
hmt_map_io(void)247 static void __init hmt_map_io(void)
248 {
249 s3c64xx_init_io(hmt_iodesc, ARRAY_SIZE(hmt_iodesc));
250 s3c64xx_set_xtal_freq(12000000);
251 s3c24xx_init_uarts(hmt_uartcfgs, ARRAY_SIZE(hmt_uartcfgs));
252 s3c64xx_set_timer_source(S3C64XX_PWM3, S3C64XX_PWM4);
253 }
254
hmt_machine_init(void)255 static void __init hmt_machine_init(void)
256 {
257 s3c_i2c0_set_platdata(NULL);
258 s3c_fb_set_platdata(&hmt_lcd_pdata);
259 s3c_nand_set_platdata(&hmt_nand_info);
260
261 gpio_request(S3C64XX_GPC(7), "usb power");
262 gpio_direction_output(S3C64XX_GPC(7), 0);
263 gpio_request(S3C64XX_GPM(0), "usb power");
264 gpio_direction_output(S3C64XX_GPM(0), 1);
265 gpio_request(S3C64XX_GPK(7), "usb power");
266 gpio_direction_output(S3C64XX_GPK(7), 1);
267 gpio_request(S3C64XX_GPF(13), "usb power");
268 gpio_direction_output(S3C64XX_GPF(13), 1);
269
270 pwm_add_table(hmt_pwm_lookup, ARRAY_SIZE(hmt_pwm_lookup));
271 platform_add_devices(hmt_devices, ARRAY_SIZE(hmt_devices));
272 }
273
274 MACHINE_START(HMT, "Airgoo-HMT")
275 /* Maintainer: Peter Korsgaard <jacmet@sunsite.dk> */
276 .atag_offset = 0x100,
277 .nr_irqs = S3C64XX_NR_IRQS,
278 .init_irq = s3c6410_init_irq,
279 .map_io = hmt_map_io,
280 .init_machine = hmt_machine_init,
281 .init_time = s3c64xx_timer_init,
282 MACHINE_END
283