summaryrefslogtreecommitdiffstats
path: root/arch/avr32/boards/favr-32/setup.c
blob: 234cb071c601d67a98c0090fc8699a3066e6f1ce (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
/*
 * Favr-32 board-specific setup code.
 *
 * Copyright (C) 2008 Atmel Corporation
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 */
#include <linux/clk.h>
#include <linux/etherdevice.h>
#include <linux/bootmem.h>
#include <linux/fb.h>
#include <linux/init.h>
#include <linux/platform_device.h>
#include <linux/types.h>
#include <linux/linkage.h>
#include <linux/gpio.h>
#include <linux/leds.h>
#include <linux/atmel-mci.h>
#include <linux/pwm.h>
#include <linux/pwm_backlight.h>
#include <linux/regulator/fixed.h>
#include <linux/regulator/machine.h>
#include <linux/spi/spi.h>
#include <linux/spi/ads7846.h>

#include <sound/atmel-abdac.h>

#include <video/atmel_lcdc.h>

#include <asm/setup.h>

#include <mach/at32ap700x.h>
#include <mach/init.h>
#include <mach/board.h>
#include <mach/portmux.h>

#define PWM_BL_CH 2

/* Oscillator frequencies. These are board-specific */
unsigned long at32_board_osc_rates[3] = {
	[0] = 32768,	/* 32.768 kHz on RTC osc */
	[1] = 20000000,	/* 20 MHz on osc0 */
	[2] = 12000000,	/* 12 MHz on osc1 */
};

/* Initialized by bootloader-specific startup code. */
struct tag *bootloader_tags __initdata;

static struct atmel_abdac_pdata __initdata abdac0_data = {
};

struct eth_addr {
	u8 addr[6];
};
static struct eth_addr __initdata hw_addr[1];
static struct macb_platform_data __initdata eth_data[1] = {
	{
		.phy_mask	= ~(1U << 1),
	},
};

static int ads7843_get_pendown_state(void)
{
	return !gpio_get_value(GPIO_PIN_PB(3));
}

static struct ads7846_platform_data ads7843_data = {
	.model			= 7843,
	.get_pendown_state	= ads7843_get_pendown_state,
	.pressure_max		= 255,
	/*
	 * Values below are for debounce filtering, these can be experimented
	 * with further.
	 */
	.debounce_max		= 20,
	.debounce_rep		= 4,
	.debounce_tol		= 5,

	.keep_vref_on		= true,
	.settle_delay_usecs	= 500,
	.penirq_recheck_delay_usecs = 100,
};

static struct spi_board_info __initdata spi1_board_info[] = {
	{
		/* ADS7843 touch controller */
		.modalias	= "ads7846",
		.max_speed_hz	= 2000000,
		.chip_select	= 0,
		.bus_num	= 1,
		.platform_data	= &ads7843_data,
	},
};

static struct mci_platform_data __initdata mci0_data = {
	.slot[0] = {
		.bus_width	= 4,
		.detect_pin	= -ENODEV,
		.wp_pin		= -ENODEV,
	},
};

static struct fb_videomode __initdata lb104v03_modes[] = {
	{
		.name		= "640x480 @ 50",
		.refresh	= 50,
		.xres		= 640,		.yres		= 480,
		.pixclock	= KHZ2PICOS(25100),

		.left_margin	= 90,		.right_margin	= 70,
		.upper_margin	= 30,		.lower_margin	= 15,
		.hsync_len	= 12,		.vsync_len	= 2,

		.sync		= 0,
		.vmode		= FB_VMODE_NONINTERLACED,
	},
};

static struct fb_monspecs __initdata favr32_default_monspecs = {
	.manufacturer		= "LG",
	.monitor		= "LB104V03",
	.modedb			= lb104v03_modes,
	.modedb_len		= ARRAY_SIZE(lb104v03_modes),
	.hfmin			= 27273,
	.hfmax			= 31111,
	.vfmin			= 45,
	.vfmax			= 60,
	.dclkmax		= 28000000,
};

struct atmel_lcdfb_pdata __initdata favr32_lcdc_data = {
	.default_bpp		= 16,
	.default_dmacon		= ATMEL_LCDC_DMAEN | ATMEL_LCDC_DMA2DEN,
	.default_lcdcon2	= (ATMEL_LCDC_DISTYPE_TFT
				   | ATMEL_LCDC_CLKMOD_ALWAYSACTIVE
				   | ATMEL_LCDC_MEMOR_BIG),
	.default_monspecs	= &favr32_default_monspecs,
	.guard_time		= 2,
};

static struct gpio_led favr32_leds[] = {
	{
		.name		 = "green",
		.gpio		 = GPIO_PIN_PE(19),
		.default_trigger = "heartbeat",
		.active_low	 = 1,
	},
	{
		.name		 = "red",
		.gpio		 = GPIO_PIN_PE(20),
		.active_low	 = 1,
	},
};

static struct gpio_led_platform_data favr32_led_data = {
	.num_leds	= ARRAY_SIZE(favr32_leds),
	.leds		= favr32_leds,
};

static struct platform_device favr32_led_dev = {
	.name		= "leds-gpio",
	.id		= 0,
	.dev		= {
		.platform_data	= &favr32_led_data,
	},
};

/*
 * The next two functions should go away as the boot loader is
 * supposed to initialize the macb address registers with a valid
 * ethernet address. But we need to keep it around for a while until
 * we can be reasonably sure the boot loader does this.
 *
 * The phy_id is ignored as the driver will probe for it.
 */
static int __init parse_tag_ethernet(struct tag *tag)
{
	int i;

	i = tag->u.ethernet.mac_index;
	if (i < ARRAY_SIZE(hw_addr))
		memcpy(hw_addr[i].addr, tag->u.ethernet.hw_address,
		       sizeof(hw_addr[i].addr));

	return 0;
}
__tagtable(ATAG_ETHERNET, parse_tag_ethernet);

static void __init set_hw_addr(struct platform_device *pdev)
{
	struct resource *res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	const u8 *addr;
	void __iomem *regs;
	struct clk *pclk;

	if (!res)
		return;
	if (pdev->id >= ARRAY_SIZE(hw_addr))
		return;

	addr = hw_addr[pdev->id].addr;
	if (!is_valid_ether_addr(addr))
		return;

	/*
	 * Since this is board-specific code, we'll cheat and use the
	 * physical address directly as we happen to know that it's
	 * the same as the virtual address.
	 */
	regs = (void __iomem __force *)res->start;
	pclk = clk_get(&pdev->dev, "pclk");
	if (IS_ERR(pclk))
		return;

	clk_enable(pclk);
	__raw_writel((addr[3] << 24) | (addr[2] << 16)
		     | (addr[1] << 8) | addr[0], regs + 0x98);
	__raw_writel((addr[5] << 8) | addr[4], regs + 0x9c);
	clk_disable(pclk);
	clk_put(pclk);
}

void __init favr32_setup_leds(void)
{
	unsigned i;

	for (i = 0; i < ARRAY_SIZE(favr32_leds); i++)
		at32_select_gpio(favr32_leds[i].gpio, AT32_GPIOF_OUTPUT);

	platform_device_register(&favr32_led_dev);
}

static struct pwm_lookup pwm_lookup[] = {
	PWM_LOOKUP("at91sam9rl-pwm", PWM_BL_CH, "pwm-backlight.0", NULL,
		   5000, PWM_POLARITY_INVERSED),
};

static struct regulator_consumer_supply fixed_power_consumers[] = {
	REGULATOR_SUPPLY("power", "pwm-backlight.0"),
};

static struct platform_pwm_backlight_data pwm_bl_data = {
	.enable_gpio		= GPIO_PIN_PA(28),
	.max_brightness		= 255,
	.dft_brightness		= 255,
	.lth_brightness		= 50,
};

static struct platform_device pwm_bl_device = {
	.name = "pwm-backlight",
	.dev = {
		.platform_data = &pwm_bl_data,
	},
};

static void __init favr32_setup_atmel_pwm_bl(void)
{
	pwm_add_table(pwm_lookup, ARRAY_SIZE(pwm_lookup));
	regulator_register_always_on(0, "fixed", fixed_power_consumers,
				    ARRAY_SIZE(fixed_power_consumers), 3300000);
	platform_device_register(&pwm_bl_device);
	at32_select_gpio(pwm_bl_data.enable_gpio, 0);
}

void __init setup_board(void)
{
	at32_map_usart(3, 0, 0);	/* USART 3 => /dev/ttyS0 */
	at32_setup_serial_console(0);
}

static int __init set_abdac_rate(struct platform_device *pdev)
{
	int retval;
	struct clk *osc1;
	struct clk *pll1;
	struct clk *abdac;

	if (pdev == NULL)
		return -ENXIO;

	osc1 = clk_get(NULL, "osc1");
	if (IS_ERR(osc1)) {
		retval = PTR_ERR(osc1);
		goto out;
	}

	pll1 = clk_get(NULL, "pll1");
	if (IS_ERR(pll1)) {
		retval = PTR_ERR(pll1);
		goto out_osc1;
	}

	abdac = clk_get(&pdev->dev, "sample_clk");
	if (IS_ERR(abdac)) {
		retval = PTR_ERR(abdac);
		goto out_pll1;
	}

	retval = clk_set_parent(pll1, osc1);
	if (retval != 0)
		goto out_abdac;

	/*
	 * Rate is 32000 to 50000 and ABDAC oversamples 256x. Multiply, in
	 * power of 2, to a value above 80 MHz. Power of 2 so it is possible
	 * for the generic clock to divide it down again and 80 MHz is the
	 * lowest frequency for the PLL.
	 */
	retval = clk_round_rate(pll1,
			CONFIG_BOARD_FAVR32_ABDAC_RATE * 256 * 16);
	if (retval <= 0) {
		retval = -EINVAL;
		goto out_abdac;
	}

	retval = clk_set_rate(pll1, retval);
	if (retval != 0)
		goto out_abdac;

	retval = clk_set_parent(abdac, pll1);
	if (retval != 0)
		goto out_abdac;

out_abdac:
	clk_put(abdac);
out_pll1:
	clk_put(pll1);
out_osc1:
	clk_put(osc1);
out:
	return retval;
}

static int __init favr32_init(void)
{
	/*
	 * Favr-32 uses 32-bit SDRAM interface. Reserve the SDRAM-specific
	 * pins so that nobody messes with them.
	 */
	at32_reserve_pin(GPIO_PIOE_BASE, ATMEL_EBI_PE_DATA_ALL);

	at32_select_gpio(GPIO_PIN_PB(3), 0);	/* IRQ from ADS7843 */

	at32_add_device_usart(0);

	set_hw_addr(at32_add_device_eth(0, &eth_data[0]));

	spi1_board_info[0].irq = gpio_to_irq(GPIO_PIN_PB(3));

	set_abdac_rate(at32_add_device_abdac(0, &abdac0_data));

	at32_add_device_pwm(1 << PWM_BL_CH);
	at32_add_device_spi(1, spi1_board_info, ARRAY_SIZE(spi1_board_info));
	at32_add_device_mci(0, &mci0_data);
	at32_add_device_usba(0, NULL);
	at32_add_device_lcdc(0, &favr32_lcdc_data, fbmem_start, fbmem_size, 0);

	favr32_setup_leds();

	favr32_setup_atmel_pwm_bl();

	return 0;
}
postcore_initcall(favr32_init);
OpenPOWER on IntegriCloud