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45c349b5 HCE |
1 | /* |
2 | * Favr-32 board-specific setup code. | |
3 | * | |
4 | * Copyright (C) 2008 Atmel Corporation | |
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 | #include <linux/clk.h> | |
11 | #include <linux/etherdevice.h> | |
12 | #include <linux/bootmem.h> | |
13 | #include <linux/fb.h> | |
14 | #include <linux/init.h> | |
15 | #include <linux/platform_device.h> | |
16 | #include <linux/types.h> | |
17 | #include <linux/linkage.h> | |
18 | #include <linux/gpio.h> | |
19 | #include <linux/leds.h> | |
20 | #include <linux/atmel-pwm-bl.h> | |
21 | #include <linux/spi/spi.h> | |
22 | #include <linux/spi/ads7846.h> | |
23 | ||
24 | #include <video/atmel_lcdc.h> | |
25 | ||
26 | #include <asm/setup.h> | |
27 | ||
8983fdb5 HS |
28 | #include <mach/at32ap700x.h> |
29 | #include <mach/init.h> | |
30 | #include <mach/board.h> | |
31 | #include <mach/portmux.h> | |
45c349b5 HCE |
32 | |
33 | /* Oscillator frequencies. These are board-specific */ | |
34 | unsigned long at32_board_osc_rates[3] = { | |
35 | [0] = 32768, /* 32.768 kHz on RTC osc */ | |
36 | [1] = 20000000, /* 20 MHz on osc0 */ | |
37 | [2] = 12000000, /* 12 MHz on osc1 */ | |
38 | }; | |
39 | ||
40 | /* Initialized by bootloader-specific startup code. */ | |
41 | struct tag *bootloader_tags __initdata; | |
42 | ||
43 | struct eth_addr { | |
44 | u8 addr[6]; | |
45 | }; | |
46 | static struct eth_addr __initdata hw_addr[1]; | |
47 | static struct eth_platform_data __initdata eth_data[1] = { | |
48 | { | |
49 | .phy_mask = ~(1U << 1), | |
50 | }, | |
51 | }; | |
52 | ||
53 | static int ads7843_get_pendown_state(void) | |
54 | { | |
55 | return !gpio_get_value(GPIO_PIN_PB(3)); | |
56 | } | |
57 | ||
58 | static struct ads7846_platform_data ads7843_data = { | |
59 | .model = 7843, | |
60 | .get_pendown_state = ads7843_get_pendown_state, | |
61 | .pressure_max = 255, | |
62 | /* | |
63 | * Values below are for debounce filtering, these can be experimented | |
64 | * with further. | |
65 | */ | |
66 | .debounce_max = 20, | |
67 | .debounce_rep = 4, | |
68 | .debounce_tol = 5, | |
69 | }; | |
70 | ||
71 | static struct spi_board_info __initdata spi1_board_info[] = { | |
72 | { | |
73 | /* ADS7843 touch controller */ | |
74 | .modalias = "ads7846", | |
75 | .max_speed_hz = 2000000, | |
76 | .chip_select = 0, | |
77 | .bus_num = 1, | |
78 | .platform_data = &ads7843_data, | |
79 | }, | |
80 | }; | |
81 | ||
82 | static struct fb_videomode __initdata lb104v03_modes[] = { | |
83 | { | |
84 | .name = "640x480 @ 50", | |
85 | .refresh = 50, | |
86 | .xres = 640, .yres = 480, | |
87 | .pixclock = KHZ2PICOS(25100), | |
88 | ||
89 | .left_margin = 90, .right_margin = 70, | |
90 | .upper_margin = 30, .lower_margin = 15, | |
91 | .hsync_len = 12, .vsync_len = 2, | |
92 | ||
93 | .sync = 0, | |
94 | .vmode = FB_VMODE_NONINTERLACED, | |
95 | }, | |
96 | }; | |
97 | ||
98 | static struct fb_monspecs __initdata favr32_default_monspecs = { | |
99 | .manufacturer = "LG", | |
100 | .monitor = "LB104V03", | |
101 | .modedb = lb104v03_modes, | |
102 | .modedb_len = ARRAY_SIZE(lb104v03_modes), | |
103 | .hfmin = 27273, | |
104 | .hfmax = 31111, | |
105 | .vfmin = 45, | |
106 | .vfmax = 60, | |
107 | .dclkmax = 28000000, | |
108 | }; | |
109 | ||
110 | struct atmel_lcdfb_info __initdata favr32_lcdc_data = { | |
111 | .default_bpp = 16, | |
112 | .default_dmacon = ATMEL_LCDC_DMAEN | ATMEL_LCDC_DMA2DEN, | |
113 | .default_lcdcon2 = (ATMEL_LCDC_DISTYPE_TFT | |
114 | | ATMEL_LCDC_CLKMOD_ALWAYSACTIVE | |
115 | | ATMEL_LCDC_MEMOR_BIG), | |
116 | .default_monspecs = &favr32_default_monspecs, | |
117 | .guard_time = 2, | |
118 | }; | |
119 | ||
120 | static struct gpio_led favr32_leds[] = { | |
121 | { | |
122 | .name = "green", | |
123 | .gpio = GPIO_PIN_PE(19), | |
124 | .default_trigger = "heartbeat", | |
125 | .active_low = 1, | |
126 | }, | |
127 | { | |
128 | .name = "red", | |
129 | .gpio = GPIO_PIN_PE(20), | |
130 | .active_low = 1, | |
131 | }, | |
132 | }; | |
133 | ||
134 | static struct gpio_led_platform_data favr32_led_data = { | |
135 | .num_leds = ARRAY_SIZE(favr32_leds), | |
136 | .leds = favr32_leds, | |
137 | }; | |
138 | ||
139 | static struct platform_device favr32_led_dev = { | |
140 | .name = "leds-gpio", | |
141 | .id = 0, | |
142 | .dev = { | |
143 | .platform_data = &favr32_led_data, | |
144 | }, | |
145 | }; | |
146 | ||
147 | /* | |
148 | * The next two functions should go away as the boot loader is | |
149 | * supposed to initialize the macb address registers with a valid | |
150 | * ethernet address. But we need to keep it around for a while until | |
151 | * we can be reasonably sure the boot loader does this. | |
152 | * | |
153 | * The phy_id is ignored as the driver will probe for it. | |
154 | */ | |
155 | static int __init parse_tag_ethernet(struct tag *tag) | |
156 | { | |
157 | int i; | |
158 | ||
159 | i = tag->u.ethernet.mac_index; | |
160 | if (i < ARRAY_SIZE(hw_addr)) | |
161 | memcpy(hw_addr[i].addr, tag->u.ethernet.hw_address, | |
162 | sizeof(hw_addr[i].addr)); | |
163 | ||
164 | return 0; | |
165 | } | |
166 | __tagtable(ATAG_ETHERNET, parse_tag_ethernet); | |
167 | ||
168 | static void __init set_hw_addr(struct platform_device *pdev) | |
169 | { | |
170 | struct resource *res = platform_get_resource(pdev, IORESOURCE_MEM, 0); | |
171 | const u8 *addr; | |
172 | void __iomem *regs; | |
173 | struct clk *pclk; | |
174 | ||
175 | if (!res) | |
176 | return; | |
177 | if (pdev->id >= ARRAY_SIZE(hw_addr)) | |
178 | return; | |
179 | ||
180 | addr = hw_addr[pdev->id].addr; | |
181 | if (!is_valid_ether_addr(addr)) | |
182 | return; | |
183 | ||
184 | /* | |
185 | * Since this is board-specific code, we'll cheat and use the | |
186 | * physical address directly as we happen to know that it's | |
187 | * the same as the virtual address. | |
188 | */ | |
189 | regs = (void __iomem __force *)res->start; | |
190 | pclk = clk_get(&pdev->dev, "pclk"); | |
191 | if (!pclk) | |
192 | return; | |
193 | ||
194 | clk_enable(pclk); | |
195 | __raw_writel((addr[3] << 24) | (addr[2] << 16) | |
196 | | (addr[1] << 8) | addr[0], regs + 0x98); | |
197 | __raw_writel((addr[5] << 8) | addr[4], regs + 0x9c); | |
198 | clk_disable(pclk); | |
199 | clk_put(pclk); | |
200 | } | |
201 | ||
202 | void __init favr32_setup_leds(void) | |
203 | { | |
204 | unsigned i; | |
205 | ||
206 | for (i = 0; i < ARRAY_SIZE(favr32_leds); i++) | |
207 | at32_select_gpio(favr32_leds[i].gpio, AT32_GPIOF_OUTPUT); | |
208 | ||
209 | platform_device_register(&favr32_led_dev); | |
210 | } | |
211 | ||
212 | static struct atmel_pwm_bl_platform_data atmel_pwm_bl_pdata = { | |
213 | .pwm_channel = 2, | |
214 | .pwm_frequency = 200000, | |
215 | .pwm_compare_max = 345, | |
216 | .pwm_duty_max = 345, | |
217 | .pwm_duty_min = 90, | |
218 | .pwm_active_low = 1, | |
219 | .gpio_on = GPIO_PIN_PA(28), | |
220 | .on_active_low = 0, | |
221 | }; | |
222 | ||
223 | static struct platform_device atmel_pwm_bl_dev = { | |
224 | .name = "atmel-pwm-bl", | |
225 | .id = 0, | |
226 | .dev = { | |
227 | .platform_data = &atmel_pwm_bl_pdata, | |
228 | }, | |
229 | }; | |
230 | ||
231 | static void __init favr32_setup_atmel_pwm_bl(void) | |
232 | { | |
233 | platform_device_register(&atmel_pwm_bl_dev); | |
234 | at32_select_gpio(atmel_pwm_bl_pdata.gpio_on, 0); | |
235 | } | |
236 | ||
237 | void __init setup_board(void) | |
238 | { | |
239 | at32_map_usart(3, 0); /* USART 3 => /dev/ttyS0 */ | |
240 | at32_setup_serial_console(0); | |
241 | } | |
242 | ||
243 | static int __init set_abdac_rate(struct platform_device *pdev) | |
244 | { | |
245 | int retval; | |
246 | struct clk *osc1; | |
247 | struct clk *pll1; | |
248 | struct clk *abdac; | |
249 | ||
250 | if (pdev == NULL) | |
251 | return -ENXIO; | |
252 | ||
253 | osc1 = clk_get(NULL, "osc1"); | |
254 | if (IS_ERR(osc1)) { | |
255 | retval = PTR_ERR(osc1); | |
256 | goto out; | |
257 | } | |
258 | ||
259 | pll1 = clk_get(NULL, "pll1"); | |
260 | if (IS_ERR(pll1)) { | |
261 | retval = PTR_ERR(pll1); | |
262 | goto out_osc1; | |
263 | } | |
264 | ||
265 | abdac = clk_get(&pdev->dev, "sample_clk"); | |
266 | if (IS_ERR(abdac)) { | |
267 | retval = PTR_ERR(abdac); | |
268 | goto out_pll1; | |
269 | } | |
270 | ||
271 | retval = clk_set_parent(pll1, osc1); | |
272 | if (retval != 0) | |
273 | goto out_abdac; | |
274 | ||
275 | /* | |
276 | * Rate is 32000 to 50000 and ABDAC oversamples 256x. Multiply, in | |
277 | * power of 2, to a value above 80 MHz. Power of 2 so it is possible | |
278 | * for the generic clock to divide it down again and 80 MHz is the | |
279 | * lowest frequency for the PLL. | |
280 | */ | |
281 | retval = clk_round_rate(pll1, | |
282 | CONFIG_BOARD_FAVR32_ABDAC_RATE * 256 * 16); | |
283 | if (retval < 0) | |
284 | goto out_abdac; | |
285 | ||
286 | retval = clk_set_rate(pll1, retval); | |
287 | if (retval != 0) | |
288 | goto out_abdac; | |
289 | ||
290 | retval = clk_set_parent(abdac, pll1); | |
291 | if (retval != 0) | |
292 | goto out_abdac; | |
293 | ||
294 | out_abdac: | |
295 | clk_put(abdac); | |
296 | out_pll1: | |
297 | clk_put(pll1); | |
298 | out_osc1: | |
299 | clk_put(osc1); | |
300 | out: | |
301 | return retval; | |
302 | } | |
303 | ||
304 | static int __init favr32_init(void) | |
305 | { | |
306 | /* | |
307 | * Favr-32 uses 32-bit SDRAM interface. Reserve the SDRAM-specific | |
308 | * pins so that nobody messes with them. | |
309 | */ | |
310 | at32_reserve_pin(GPIO_PIN_PE(0)); /* DATA[16] */ | |
311 | at32_reserve_pin(GPIO_PIN_PE(1)); /* DATA[17] */ | |
312 | at32_reserve_pin(GPIO_PIN_PE(2)); /* DATA[18] */ | |
313 | at32_reserve_pin(GPIO_PIN_PE(3)); /* DATA[19] */ | |
314 | at32_reserve_pin(GPIO_PIN_PE(4)); /* DATA[20] */ | |
315 | at32_reserve_pin(GPIO_PIN_PE(5)); /* DATA[21] */ | |
316 | at32_reserve_pin(GPIO_PIN_PE(6)); /* DATA[22] */ | |
317 | at32_reserve_pin(GPIO_PIN_PE(7)); /* DATA[23] */ | |
318 | at32_reserve_pin(GPIO_PIN_PE(8)); /* DATA[24] */ | |
319 | at32_reserve_pin(GPIO_PIN_PE(9)); /* DATA[25] */ | |
320 | at32_reserve_pin(GPIO_PIN_PE(10)); /* DATA[26] */ | |
321 | at32_reserve_pin(GPIO_PIN_PE(11)); /* DATA[27] */ | |
322 | at32_reserve_pin(GPIO_PIN_PE(12)); /* DATA[28] */ | |
323 | at32_reserve_pin(GPIO_PIN_PE(13)); /* DATA[29] */ | |
324 | at32_reserve_pin(GPIO_PIN_PE(14)); /* DATA[30] */ | |
325 | at32_reserve_pin(GPIO_PIN_PE(15)); /* DATA[31] */ | |
326 | at32_reserve_pin(GPIO_PIN_PE(26)); /* SDCS */ | |
327 | ||
328 | at32_select_gpio(GPIO_PIN_PB(3), 0); /* IRQ from ADS7843 */ | |
329 | ||
330 | at32_add_system_devices(); | |
331 | ||
332 | at32_add_device_usart(0); | |
333 | ||
334 | set_hw_addr(at32_add_device_eth(0, ð_data[0])); | |
335 | ||
336 | spi1_board_info[0].irq = gpio_to_irq(GPIO_PIN_PB(3)); | |
337 | ||
338 | set_abdac_rate(at32_add_device_abdac(0)); | |
339 | ||
340 | at32_add_device_pwm(1 << atmel_pwm_bl_pdata.pwm_channel); | |
341 | at32_add_device_spi(1, spi1_board_info, ARRAY_SIZE(spi1_board_info)); | |
342 | at32_add_device_mci(0, NULL); | |
343 | at32_add_device_usba(0, NULL); | |
344 | at32_add_device_lcdc(0, &favr32_lcdc_data, fbmem_start, fbmem_size, 0); | |
345 | ||
346 | favr32_setup_leds(); | |
347 | ||
348 | favr32_setup_atmel_pwm_bl(); | |
349 | ||
350 | return 0; | |
351 | } | |
352 | postcore_initcall(favr32_init); |