1 /*
2 * Board-specific setup code for the MIMC200
3 *
4 * Copyright (C) 2008 Mercury IMC Ltd
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 extern struct atmel_lcdfb_info mimc200_lcdc_data;
12
13 #include <linux/clk.h>
14 #include <linux/etherdevice.h>
15 #include <linux/i2c-gpio.h>
16 #include <linux/init.h>
17 #include <linux/linkage.h>
18 #include <linux/platform_device.h>
19 #include <linux/types.h>
20 #include <linux/leds.h>
21 #include <linux/spi/spi.h>
22 #include <linux/spi/eeprom.h>
23
24 #include <video/atmel_lcdc.h>
25 #include <linux/fb.h>
26
27 #include <linux/atmel-mci.h>
28 #include <linux/io.h>
29 #include <asm/setup.h>
30
31 #include <mach/at32ap700x.h>
32 #include <mach/board.h>
33 #include <mach/init.h>
34 #include <mach/portmux.h>
35
36 /* Oscillator frequencies. These are board-specific */
37 unsigned long at32_board_osc_rates[3] = {
38 [0] = 32768, /* 32.768 kHz on RTC osc */
39 [1] = 10000000, /* 10 MHz on osc0 */
40 [2] = 12000000, /* 12 MHz on osc1 */
41 };
42
43 /* Initialized by bootloader-specific startup code. */
44 struct tag *bootloader_tags __initdata;
45
46 static struct fb_videomode __initdata pt0434827_modes[] = {
47 {
48 .name = "480x272 @ 72",
49 .refresh = 72,
50 .xres = 480, .yres = 272,
51 .pixclock = KHZ2PICOS(10000),
52
53 .left_margin = 1, .right_margin = 1,
54 .upper_margin = 12, .lower_margin = 1,
55 .hsync_len = 42, .vsync_len = 1,
56
57 .sync = 0,
58 .vmode = FB_VMODE_NONINTERLACED,
59 },
60 };
61
62 static struct fb_monspecs __initdata mimc200_default_monspecs = {
63 .manufacturer = "PT",
64 .monitor = "PT0434827-A401",
65 .modedb = pt0434827_modes,
66 .modedb_len = ARRAY_SIZE(pt0434827_modes),
67 .hfmin = 14820,
68 .hfmax = 22230,
69 .vfmin = 60,
70 .vfmax = 85,
71 .dclkmax = 25200000,
72 };
73
74 struct atmel_lcdfb_info __initdata mimc200_lcdc_data = {
75 .default_bpp = 16,
76 .default_dmacon = ATMEL_LCDC_DMAEN | ATMEL_LCDC_DMA2DEN,
77 .default_lcdcon2 = (ATMEL_LCDC_DISTYPE_TFT
78 | ATMEL_LCDC_INVCLK
79 | ATMEL_LCDC_CLKMOD_ALWAYSACTIVE
80 | ATMEL_LCDC_MEMOR_BIG),
81 .default_monspecs = &mimc200_default_monspecs,
82 .guard_time = 2,
83 };
84
85 struct eth_addr {
86 u8 addr[6];
87 };
88 static struct eth_addr __initdata hw_addr[2];
89 static struct eth_platform_data __initdata eth_data[2];
90
91 static struct spi_eeprom eeprom_25lc010 = {
92 .name = "25lc010",
93 .byte_len = 128,
94 .page_size = 16,
95 .flags = EE_ADDR1,
96 };
97
98 static struct spi_board_info spi0_board_info[] __initdata = {
99 {
100 .modalias = "rtc-ds1390",
101 .max_speed_hz = 4000000,
102 .chip_select = 2,
103 },
104 {
105 .modalias = "at25",
106 .max_speed_hz = 1000000,
107 .chip_select = 1,
108 .mode = SPI_MODE_3,
109 .platform_data = &eeprom_25lc010,
110 },
111 };
112
113 static struct mci_platform_data __initdata mci0_data = {
114 .slot[0] = {
115 .bus_width = 4,
116 .detect_pin = GPIO_PIN_PA(26),
117 .wp_pin = GPIO_PIN_PA(27),
118 },
119 };
120
121 /*
122 * The next two functions should go away as the boot loader is
123 * supposed to initialize the macb address registers with a valid
124 * ethernet address. But we need to keep it around for a while until
125 * we can be reasonably sure the boot loader does this.
126 *
127 * The phy_id is ignored as the driver will probe for it.
128 */
parse_tag_ethernet(struct tag * tag)129 static int __init parse_tag_ethernet(struct tag *tag)
130 {
131 int i;
132
133 i = tag->u.ethernet.mac_index;
134 if (i < ARRAY_SIZE(hw_addr))
135 memcpy(hw_addr[i].addr, tag->u.ethernet.hw_address,
136 sizeof(hw_addr[i].addr));
137
138 return 0;
139 }
140 __tagtable(ATAG_ETHERNET, parse_tag_ethernet);
141
set_hw_addr(struct platform_device * pdev)142 static void __init set_hw_addr(struct platform_device *pdev)
143 {
144 struct resource *res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
145 const u8 *addr;
146 void __iomem *regs;
147 struct clk *pclk;
148
149 if (!res)
150 return;
151 if (pdev->id >= ARRAY_SIZE(hw_addr))
152 return;
153
154 addr = hw_addr[pdev->id].addr;
155 if (!is_valid_ether_addr(addr))
156 return;
157
158 /*
159 * Since this is board-specific code, we'll cheat and use the
160 * physical address directly as we happen to know that it's
161 * the same as the virtual address.
162 */
163 regs = (void __iomem __force *)res->start;
164 pclk = clk_get(&pdev->dev, "pclk");
165 if (IS_ERR(pclk))
166 return;
167
168 clk_enable(pclk);
169 __raw_writel((addr[3] << 24) | (addr[2] << 16)
170 | (addr[1] << 8) | addr[0], regs + 0x98);
171 __raw_writel((addr[5] << 8) | addr[4], regs + 0x9c);
172 clk_disable(pclk);
173 clk_put(pclk);
174 }
175
setup_board(void)176 void __init setup_board(void)
177 {
178 at32_map_usart(0, 0, 0); /* USART 0: /dev/ttyS0 (TTL --> Altera) */
179 at32_map_usart(1, 1, 0); /* USART 1: /dev/ttyS1 (RS232) */
180 at32_map_usart(2, 2, 0); /* USART 2: /dev/ttyS2 (RS485) */
181 at32_map_usart(3, 3, 0); /* USART 3: /dev/ttyS3 (RS422 Multidrop) */
182 }
183
184 static struct i2c_gpio_platform_data i2c_gpio_data = {
185 .sda_pin = GPIO_PIN_PA(6),
186 .scl_pin = GPIO_PIN_PA(7),
187 .sda_is_open_drain = 1,
188 .scl_is_open_drain = 1,
189 .udelay = 2, /* close to 100 kHz */
190 };
191
192 static struct platform_device i2c_gpio_device = {
193 .name = "i2c-gpio",
194 .id = 0,
195 .dev = {
196 .platform_data = &i2c_gpio_data,
197 },
198 };
199
200 static struct i2c_board_info __initdata i2c_info[] = {
201 };
202
mimc200_init(void)203 static int __init mimc200_init(void)
204 {
205 /*
206 * MIMC200 uses 16-bit SDRAM interface, so we don't need to
207 * reserve any pins for it.
208 */
209
210 at32_add_device_usart(0);
211 at32_add_device_usart(1);
212 at32_add_device_usart(2);
213 at32_add_device_usart(3);
214
215 set_hw_addr(at32_add_device_eth(0, ð_data[0]));
216 set_hw_addr(at32_add_device_eth(1, ð_data[1]));
217
218 at32_add_device_spi(0, spi0_board_info, ARRAY_SIZE(spi0_board_info));
219 at32_add_device_mci(0, &mci0_data);
220 at32_add_device_usba(0, NULL);
221
222 at32_select_periph(GPIO_PIOB_BASE, 1 << 28, 0, AT32_GPIOF_PULLUP);
223 at32_select_gpio(i2c_gpio_data.sda_pin,
224 AT32_GPIOF_MULTIDRV | AT32_GPIOF_OUTPUT | AT32_GPIOF_HIGH);
225 at32_select_gpio(i2c_gpio_data.scl_pin,
226 AT32_GPIOF_MULTIDRV | AT32_GPIOF_OUTPUT | AT32_GPIOF_HIGH);
227 platform_device_register(&i2c_gpio_device);
228 i2c_register_board_info(0, i2c_info, ARRAY_SIZE(i2c_info));
229
230 at32_add_device_lcdc(0, &mimc200_lcdc_data,
231 fbmem_start, fbmem_size,
232 ATMEL_LCDC_CONTROL | ATMEL_LCDC_ALT_CONTROL | ATMEL_LCDC_ALT_24B_DATA);
233
234 return 0;
235 }
236 postcore_initcall(mimc200_init);
237