Linux Kernel  3.7.1
 All Data Structures Namespaces Files Functions Variables Typedefs Enumerations Enumerator Macros Groups Pages
setup.c
Go to the documentation of this file.
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 
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. */
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 
75  .default_bpp = 16,
76  .default_dmacon = ATMEL_LCDC_DMAEN | ATMEL_LCDC_DMA2DEN,
77  .default_lcdcon2 = (ATMEL_LCDC_DISTYPE_TFT
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 macb_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  */
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 
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 
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 
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 
214 
215  set_hw_addr(at32_add_device_eth(0, &eth_data[0]));
216  set_hw_addr(at32_add_device_eth(1, &eth_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);
221 
223  at32_select_gpio(i2c_gpio_data.sda_pin,
225  at32_select_gpio(i2c_gpio_data.scl_pin,
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,
233 
234  return 0;
235 }
236 postcore_initcall(mimc200_init);