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-mci.h>
  21 #include <linux/atmel-pwm-bl.h>
  22 #include <linux/spi/spi.h>
  23 #include <linux/spi/ads7846.h>
  24
  25 #include <sound/atmel-abdac.h>
  26
  27 #include <video/atmel_lcdc.h>
  28
  29 #include <asm/setup.h>
  30
  31 #include <mach/at32ap700x.h>
  32 #include <mach/init.h>
  33 #include <mach/board.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] = 20000000, /* 20 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 atmel_abdac_pdata __initdata abdac0_data = {
  47 };
  48
  49 struct eth_addr {
  50         u8 addr[6];
  51 };
  52 static struct eth_addr __initdata hw_addr[1];
  53 static struct eth_platform_data __initdata eth_data[1] = {
  54         {
  55                 .phy_mask       = ~(1U << 1),
  56         },
  57 };
  58
  59 static int ads7843_get_pendown_state(void)
  60 {
  61         return !gpio_get_value(GPIO_PIN_PB(3));
  62 }
  63
  64 static struct ads7846_platform_data ads7843_data = {
  65         .model                  = 7843,
  66         .get_pendown_state      = ads7843_get_pendown_state,
  67         .pressure_max           = 255,
  68         /*
  69          * Values below are for debounce filtering, these can be experimented
  70          * with further.
  71          */
  72         .debounce_max           = 20,
  73         .debounce_rep           = 4,
  74         .debounce_tol           = 5,
  75
  76         .keep_vref_on           = true,
  77         .settle_delay_usecs     = 500,
  78         .penirq_recheck_delay_usecs = 100,
  79 };
  80
  81 static struct spi_board_info __initdata spi1_board_info[] = {
  82         {
  83                 /* ADS7843 touch controller */
  84                 .modalias       = "ads7846",
  85                 .max_speed_hz   = 2000000,
  86                 .chip_select    = 0,
  87                 .bus_num        = 1,
  88                 .platform_data  = &ads7843_data,
  89         },
  90 };
  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 static struct fb_videomode __initdata lb104v03_modes[] = {
 101         {
 102                 .name           = "640x480 @ 50",
 103                 .refresh        = 50,
 104                 .xres           = 640,          .yres           = 480,
 105                 .pixclock       = KHZ2PICOS(25100),
 106
 107                 .left_margin    = 90,           .right_margin   = 70,
 108                 .upper_margin   = 30,           .lower_margin   = 15,
 109                 .hsync_len      = 12,           .vsync_len      = 2,
 110
 111                 .sync           = 0,
 112                 .vmode          = FB_VMODE_NONINTERLACED,
 113         },
 114 };
 115
 116 static struct fb_monspecs __initdata favr32_default_monspecs = {
 117         .manufacturer           = "LG",
 118         .monitor                = "LB104V03",
 119         .modedb                 = lb104v03_modes,
 120         .modedb_len             = ARRAY_SIZE(lb104v03_modes),
 121         .hfmin                  = 27273,
 122         .hfmax                  = 31111,
 123         .vfmin                  = 45,
 124         .vfmax                  = 60,
 125         .dclkmax                = 28000000,
 126 };
 127
 128 struct atmel_lcdfb_info __initdata favr32_lcdc_data = {
 129         .default_bpp            = 16,
 130         .default_dmacon         = ATMEL_LCDC_DMAEN | ATMEL_LCDC_DMA2DEN,
 131         .default_lcdcon2        = (ATMEL_LCDC_DISTYPE_TFT
 132                                    | ATMEL_LCDC_CLKMOD_ALWAYSACTIVE
 133                                    | ATMEL_LCDC_MEMOR_BIG),
 134         .default_monspecs       = &favr32_default_monspecs,
 135         .guard_time             = 2,
 136 };
 137
 138 static struct gpio_led favr32_leds[] = {
 139         {
 140                 .name            = "green",
 141                 .gpio            = GPIO_PIN_PE(19),
 142                 .default_trigger = "heartbeat",
 143                 .active_low      = 1,
 144         },
 145         {
 146                 .name            = "red",
 147                 .gpio            = GPIO_PIN_PE(20),
 148                 .active_low      = 1,
 149         },
 150 };
 151
 152 static struct gpio_led_platform_data favr32_led_data = {
 153         .num_leds       = ARRAY_SIZE(favr32_leds),
 154         .leds           = favr32_leds,
 155 };
 156
 157 static struct platform_device favr32_led_dev = {
 158         .name           = "leds-gpio",
 159         .id             = 0,
 160         .dev            = {
 161                 .platform_data  = &favr32_led_data,
 162         },
 163 };
 164
 165 /*
 166  * The next two functions should go away as the boot loader is
 167  * supposed to initialize the macb address registers with a valid
 168  * ethernet address. But we need to keep it around for a while until
 169  * we can be reasonably sure the boot loader does this.
 170  *
 171  * The phy_id is ignored as the driver will probe for it.
 172  */
 173 static int __init parse_tag_ethernet(struct tag *tag)
 174 {
 175         int i;
 176
 177         i = tag->u.ethernet.mac_index;
 178         if (i < ARRAY_SIZE(hw_addr))
 179                 memcpy(hw_addr[i].addr, tag->u.ethernet.hw_address,
 180                        sizeof(hw_addr[i].addr));
 181
 182         return 0;
 183 }
 184 __tagtable(ATAG_ETHERNET, parse_tag_ethernet);
 185
 186 static void __init set_hw_addr(struct platform_device *pdev)
 187 {
 188         struct resource *res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 189         const u8 *addr;
 190         void __iomem *regs;
 191         struct clk *pclk;
 192
 193         if (!res)
 194                 return;
 195         if (pdev->id >= ARRAY_SIZE(hw_addr))
 196                 return;
 197
 198         addr = hw_addr[pdev->id].addr;
 199         if (!is_valid_ether_addr(addr))
 200                 return;
 201
 202         /*
 203          * Since this is board-specific code, we'll cheat and use the
 204          * physical address directly as we happen to know that it's
 205          * the same as the virtual address.
 206          */
 207         regs = (void __iomem __force *)res->start;
 208         pclk = clk_get(&pdev->dev, "pclk");
 209         if (IS_ERR(pclk))
 210                 return;
 211
 212         clk_enable(pclk);
 213         __raw_writel((addr[3] << 24) | (addr[2] << 16)
 214                      | (addr[1] << 8) | addr[0], regs + 0x98);
 215         __raw_writel((addr[5] << 8) | addr[4], regs + 0x9c);
 216         clk_disable(pclk);
 217         clk_put(pclk);
 218 }
 219
 220 void __init favr32_setup_leds(void)
 221 {
 222         unsigned i;
 223
 224         for (i = 0; i < ARRAY_SIZE(favr32_leds); i++)
 225                 at32_select_gpio(favr32_leds[i].gpio, AT32_GPIOF_OUTPUT);
 226
 227         platform_device_register(&favr32_led_dev);
 228 }
 229
 230 static struct atmel_pwm_bl_platform_data atmel_pwm_bl_pdata = {
 231         .pwm_channel            = 2,
 232         .pwm_frequency          = 200000,
 233         .pwm_compare_max        = 345,
 234         .pwm_duty_max           = 345,
 235         .pwm_duty_min           = 90,
 236         .pwm_active_low         = 1,
 237         .gpio_on                = GPIO_PIN_PA(28),
 238         .on_active_low          = 0,
 239 };
 240
 241 static struct platform_device atmel_pwm_bl_dev = {
 242         .name           = "atmel-pwm-bl",
 243         .id             = 0,
 244         .dev            = {
 245                 .platform_data = &atmel_pwm_bl_pdata,
 246         },
 247 };
 248
 249 static void __init favr32_setup_atmel_pwm_bl(void)
 250 {
 251         platform_device_register(&atmel_pwm_bl_dev);
 252         at32_select_gpio(atmel_pwm_bl_pdata.gpio_on, 0);
 253 }
 254
 255 void __init setup_board(void)
 256 {
 257         at32_map_usart(3, 0, 0);        /* USART 3 => /dev/ttyS0 */
 258         at32_setup_serial_console(0);
 259 }
 260
 261 static int __init set_abdac_rate(struct platform_device *pdev)
 262 {
 263         int retval;
 264         struct clk *osc1;
 265         struct clk *pll1;
 266         struct clk *abdac;
 267
 268         if (pdev == NULL)
 269                 return -ENXIO;
 270
 271         osc1 = clk_get(NULL, "osc1");
 272         if (IS_ERR(osc1)) {
 273                 retval = PTR_ERR(osc1);
 274                 goto out;
 275         }
 276
 277         pll1 = clk_get(NULL, "pll1");
 278         if (IS_ERR(pll1)) {
 279                 retval = PTR_ERR(pll1);
 280                 goto out_osc1;
 281         }
 282
 283         abdac = clk_get(&pdev->dev, "sample_clk");
 284         if (IS_ERR(abdac)) {
 285                 retval = PTR_ERR(abdac);
 286                 goto out_pll1;
 287         }
 288
 289         retval = clk_set_parent(pll1, osc1);
 290         if (retval != 0)
 291                 goto out_abdac;
 292
 293         /*
 294          * Rate is 32000 to 50000 and ABDAC oversamples 256x. Multiply, in
 295          * power of 2, to a value above 80 MHz. Power of 2 so it is possible
 296          * for the generic clock to divide it down again and 80 MHz is the
 297          * lowest frequency for the PLL.
 298          */
 299         retval = clk_round_rate(pll1,
 300                         CONFIG_BOARD_FAVR32_ABDAC_RATE * 256 * 16);
 301         if (retval < 0)
 302                 goto out_abdac;
 303
 304         retval = clk_set_rate(pll1, retval);
 305         if (retval != 0)
 306                 goto out_abdac;
 307
 308         retval = clk_set_parent(abdac, pll1);
 309         if (retval != 0)
 310                 goto out_abdac;
 311
 312 out_abdac:
 313         clk_put(abdac);
 314 out_pll1:
 315         clk_put(pll1);
 316 out_osc1:
 317         clk_put(osc1);
 318 out:
 319         return retval;
 320 }
 321
 322 static int __init favr32_init(void)
 323 {
 324         /*
 325          * Favr-32 uses 32-bit SDRAM interface. Reserve the SDRAM-specific
 326          * pins so that nobody messes with them.
 327          */
 328         at32_reserve_pin(GPIO_PIOE_BASE, ATMEL_EBI_PE_DATA_ALL);
 329
 330         at32_select_gpio(GPIO_PIN_PB(3), 0);    /* IRQ from ADS7843 */
 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, &abdac0_data));
 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, &mci0_data);
 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);