arch/avr32/boards/favr-32/setup.c

   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
  28 #include <mach/at32ap700x.h>
  29 #include <mach/init.h>
  30 #include <mach/board.h>
  31 #include <mach/portmux.h>
  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, &eth_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);