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Linux/arch/avr32/boards/hammerhead/setup.c

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  1 /*
  2  * Board-specific setup code for the Miromico Hammerhead board
  3  *
  4  * Copyright (C) 2008 Miromico AG
  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/atmel-mci.h>
 11 #include <linux/clk.h>
 12 #include <linux/fb.h>
 13 #include <linux/etherdevice.h>
 14 #include <linux/i2c.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/spi/spi.h>
 21 
 22 #include <video/atmel_lcdc.h>
 23 
 24 #include <linux/io.h>
 25 #include <asm/setup.h>
 26 
 27 #include <mach/at32ap700x.h>
 28 #include <mach/board.h>
 29 #include <mach/init.h>
 30 #include <mach/portmux.h>
 31 
 32 #include <sound/atmel-ac97c.h>
 33 
 34 #include "../../mach-at32ap/clock.h"
 35 #include "flash.h"
 36 
 37 /* Oscillator frequencies. These are board-specific */
 38 unsigned long at32_board_osc_rates[3] = {
 39         [0] = 32768,    /* 32.768 kHz on RTC osc */
 40         [1] = 25000000, /* 25MHz on osc0 */
 41         [2] = 12000000, /* 12 MHz on osc1 */
 42 };
 43 
 44 /* Initialized by bootloader-specific startup code. */
 45 struct tag *bootloader_tags __initdata;
 46 
 47 #ifdef CONFIG_BOARD_HAMMERHEAD_LCD
 48 static struct fb_videomode __initdata hda350tlv_modes[] = {
 49         {
 50                 .name           = "320x240 @ 75",
 51                 .refresh        = 75,
 52                 .xres           = 320,
 53                 .yres           = 240,
 54                 .pixclock       = KHZ2PICOS(6891),
 55 
 56                 .left_margin    = 48,
 57                 .right_margin   = 18,
 58                 .upper_margin   = 18,
 59                 .lower_margin   = 4,
 60                 .hsync_len      = 20,
 61                 .vsync_len      = 2,
 62 
 63                 .sync           = 0,
 64                 .vmode          = FB_VMODE_NONINTERLACED,
 65         },
 66 };
 67 
 68 static struct fb_monspecs __initdata hammerhead_hda350t_monspecs = {
 69         .manufacturer           = "HAN",
 70         .monitor                = "HDA350T-LV",
 71         .modedb                 = hda350tlv_modes,
 72         .modedb_len             = ARRAY_SIZE(hda350tlv_modes),
 73         .hfmin                  = 14900,
 74         .hfmax                  = 22350,
 75         .vfmin                  = 60,
 76         .vfmax                  = 90,
 77         .dclkmax                = 10000000,
 78 };
 79 
 80 struct atmel_lcdfb_info __initdata hammerhead_lcdc_data = {
 81         .default_bpp            = 24,
 82         .default_dmacon         = ATMEL_LCDC_DMAEN | ATMEL_LCDC_DMA2DEN,
 83         .default_lcdcon2        = (ATMEL_LCDC_DISTYPE_TFT
 84                                    | ATMEL_LCDC_INVCLK
 85                                    | ATMEL_LCDC_CLKMOD_ALWAYSACTIVE
 86                                    | ATMEL_LCDC_MEMOR_BIG),
 87         .default_monspecs       = &hammerhead_hda350t_monspecs,
 88         .guard_time             = 2,
 89 };
 90 #endif
 91 
 92 static struct mci_platform_data __initdata mci0_data = {
 93         .slot[0] = {
 94                 .bus_width      = 4,
 95                 .detect_pin     = -ENODEV,
 96                 .wp_pin         = -ENODEV,
 97         },
 98 };
 99 
100 struct eth_addr {
101         u8 addr[6];
102 };
103 
104 static struct eth_addr __initdata hw_addr[1];
105 static struct macb_platform_data __initdata eth_data[1];
106 
107 /*
108  * The next two functions should go away as the boot loader is
109  * supposed to initialize the macb address registers with a valid
110  * ethernet address. But we need to keep it around for a while until
111  * we can be reasonably sure the boot loader does this.
112  *
113  * The phy_id is ignored as the driver will probe for it.
114  */
115 static int __init parse_tag_ethernet(struct tag *tag)
116 {
117         int i = tag->u.ethernet.mac_index;
118 
119         if (i < ARRAY_SIZE(hw_addr))
120                 memcpy(hw_addr[i].addr, tag->u.ethernet.hw_address,
121                        sizeof(hw_addr[i].addr));
122 
123         return 0;
124 }
125 __tagtable(ATAG_ETHERNET, parse_tag_ethernet);
126 
127 static void __init set_hw_addr(struct platform_device *pdev)
128 {
129         struct resource *res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
130         const u8 *addr;
131         void __iomem *regs;
132         struct clk *pclk;
133 
134         if (!res)
135                 return;
136 
137         if (pdev->id >= ARRAY_SIZE(hw_addr))
138                 return;
139 
140         addr = hw_addr[pdev->id].addr;
141 
142         if (!is_valid_ether_addr(addr))
143                 return;
144 
145         /*
146          * Since this is board-specific code, we'll cheat and use the
147          * physical address directly as we happen to know that it's
148          * the same as the virtual address.
149          */
150         regs = (void __iomem __force *)res->start;
151         pclk = clk_get(&pdev->dev, "pclk");
152 
153         if (IS_ERR(pclk))
154                 return;
155 
156         clk_enable(pclk);
157 
158         __raw_writel((addr[3] << 24) | (addr[2] << 16) | (addr[1] << 8) |
159                      addr[0], regs + 0x98);
160         __raw_writel((addr[5] << 8) | addr[4], regs + 0x9c);
161 
162         clk_disable(pclk);
163         clk_put(pclk);
164 }
165 
166 void __init setup_board(void)
167 {
168         at32_map_usart(1, 0, 0);        /* USART 1: /dev/ttyS0, DB9 */
169         at32_setup_serial_console(0);
170 }
171 
172 static struct i2c_gpio_platform_data i2c_gpio_data = {
173         .sda_pin                = GPIO_PIN_PA(6),
174         .scl_pin                = GPIO_PIN_PA(7),
175         .sda_is_open_drain      = 1,
176         .scl_is_open_drain      = 1,
177         .udelay                 = 2,    /* close to 100 kHz */
178 };
179 
180 static struct platform_device i2c_gpio_device = {
181         .name           = "i2c-gpio",
182         .id             = 0,
183         .dev            = { .platform_data = &i2c_gpio_data, },
184 };
185 
186 static struct i2c_board_info __initdata i2c_info[] = {};
187 
188 #ifdef CONFIG_BOARD_HAMMERHEAD_SND
189 static struct ac97c_platform_data ac97c_data = {
190         .reset_pin = GPIO_PIN_PA(16),
191 };
192 #endif
193 
194 static int __init hammerhead_init(void)
195 {
196         /*
197          * Hammerhead uses 32-bit SDRAM interface. Reserve the
198          * SDRAM-specific pins so that nobody messes with them.
199          */
200         at32_reserve_pin(GPIO_PIOE_BASE, ATMEL_EBI_PE_DATA_ALL);
201 
202         at32_add_device_usart(0);
203 
204         /* Reserve PB29 (GCLK3). This pin is used as clock source
205          * for ETH PHY (25MHz). GCLK3 setup is done by U-Boot.
206          */
207         at32_reserve_pin(GPIO_PIOB_BASE, (1<<29));
208 
209         /*
210          * Hammerhead uses only one ethernet port, so we don't set
211          * address of second port
212          */
213         set_hw_addr(at32_add_device_eth(0, &eth_data[0]));
214 
215 #ifdef CONFIG_BOARD_HAMMERHEAD_FPGA
216         at32_add_device_hh_fpga();
217 #endif
218         at32_add_device_mci(0, &mci0_data);
219 
220 #ifdef CONFIG_BOARD_HAMMERHEAD_USB
221         at32_add_device_usba(0, NULL);
222 #endif
223 #ifdef CONFIG_BOARD_HAMMERHEAD_LCD
224         at32_add_device_lcdc(0, &hammerhead_lcdc_data, fbmem_start,
225                              fbmem_size, ATMEL_LCDC_PRI_24BIT);
226 #endif
227 
228         at32_select_gpio(i2c_gpio_data.sda_pin,
229                          AT32_GPIOF_MULTIDRV | AT32_GPIOF_OUTPUT |
230                          AT32_GPIOF_HIGH);
231         at32_select_gpio(i2c_gpio_data.scl_pin,
232                          AT32_GPIOF_MULTIDRV | AT32_GPIOF_OUTPUT |
233                          AT32_GPIOF_HIGH);
234         platform_device_register(&i2c_gpio_device);
235         i2c_register_board_info(0, i2c_info, ARRAY_SIZE(i2c_info));
236 
237 #ifdef CONFIG_BOARD_HAMMERHEAD_SND
238         at32_add_device_ac97c(0, &ac97c_data, AC97C_BOTH);
239 #endif
240 
241         /* Select the Touchscreen interrupt pin mode */
242         at32_select_periph(GPIO_PIOB_BASE, 0x08000000, GPIO_PERIPH_A, 0);
243 
244         return 0;
245 }
246 
247 postcore_initcall(hammerhead_init);
248 

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