arch/arm/mach-lpc32xx/phy3250.c

   1 /*
   2  * arch/arm/mach-lpc32xx/phy3250.c
   3  *
   4  * Author: Kevin Wells <kevin.wells@nxp.com>
   5  *
   6  * Copyright (C) 2010 NXP Semiconductors
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License as published by
  10  * the Free Software Foundation; either version 2 of the License, or
  11  * (at your option) any later version.
  12  *
  13  * This program is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  * GNU General Public License for more details.
  17  */
  18
  19 #include <linux/init.h>
  20 #include <linux/platform_device.h>
  21 #include <linux/sysdev.h>
  22 #include <linux/interrupt.h>
  23 #include <linux/irq.h>
  24 #include <linux/dma-mapping.h>
  25 #include <linux/device.h>
  26 #include <linux/spi/spi.h>
  27 #include <linux/spi/eeprom.h>
  28 #include <linux/leds.h>
  29 #include <linux/gpio.h>
  30 #include <linux/amba/bus.h>
  31 #include <linux/amba/clcd.h>
  32 #include <linux/amba/pl022.h>
  33
  34 #include <asm/setup.h>
  35 #include <asm/mach-types.h>
  36 #include <asm/mach/arch.h>
  37
  38 #include <mach/hardware.h>
  39 #include <mach/platform.h>
  40 #include "common.h"
  41
  42 /*
  43  * Mapped GPIOLIB GPIOs
  44  */
  45 #define SPI0_CS_GPIO    LPC32XX_GPIO(LPC32XX_GPIO_P3_GRP, 5)
  46 #define LCD_POWER_GPIO  LPC32XX_GPIO(LPC32XX_GPO_P3_GRP, 0)
  47 #define BKL_POWER_GPIO  LPC32XX_GPIO(LPC32XX_GPO_P3_GRP, 4)
  48 #define LED_GPIO        LPC32XX_GPIO(LPC32XX_GPO_P3_GRP, 1)
  49
  50 /*
  51  * AMBA LCD controller
  52  */
  53 static struct clcd_panel conn_lcd_panel = {
  54         .mode           = {
  55                 .name           = "QVGA portrait",
  56                 .refresh        = 60,
  57                 .xres           = 240,
  58                 .yres           = 320,
  59                 .pixclock       = 191828,
  60                 .left_margin    = 22,
  61                 .right_margin   = 11,
  62                 .upper_margin   = 2,
  63                 .lower_margin   = 1,
  64                 .hsync_len      = 5,
  65                 .vsync_len      = 2,
  66                 .sync           = 0,
  67                 .vmode          = FB_VMODE_NONINTERLACED,
  68         },
  69         .width          = -1,
  70         .height         = -1,
  71         .tim2           = (TIM2_IVS | TIM2_IHS),
  72         .cntl           = (CNTL_BGR | CNTL_LCDTFT | CNTL_LCDVCOMP(1) |
  73                                 CNTL_LCDBPP16_565),
  74         .bpp            = 16,
  75 };
  76 #define PANEL_SIZE (3 * SZ_64K)
  77
  78 static int lpc32xx_clcd_setup(struct clcd_fb *fb)
  79 {
  80         dma_addr_t dma;
  81
  82         fb->fb.screen_base = dma_alloc_writecombine(&fb->dev->dev,
  83                 PANEL_SIZE, &dma, GFP_KERNEL);
  84         if (!fb->fb.screen_base) {
  85                 printk(KERN_ERR "CLCD: unable to map framebuffer\n");
  86                 return -ENOMEM;
  87         }
  88
  89         fb->fb.fix.smem_start = dma;
  90         fb->fb.fix.smem_len = PANEL_SIZE;
  91         fb->panel = &conn_lcd_panel;
  92
  93         if (gpio_request(LCD_POWER_GPIO, "LCD power"))
  94                 printk(KERN_ERR "Error requesting gpio %u",
  95                         LCD_POWER_GPIO);
  96         else if (gpio_direction_output(LCD_POWER_GPIO, 1))
  97                 printk(KERN_ERR "Error setting gpio %u to output",
  98                         LCD_POWER_GPIO);
  99
 100         if (gpio_request(BKL_POWER_GPIO, "LCD backlight power"))
 101                 printk(KERN_ERR "Error requesting gpio %u",
 102                         BKL_POWER_GPIO);
 103         else if (gpio_direction_output(BKL_POWER_GPIO, 1))
 104                 printk(KERN_ERR "Error setting gpio %u to output",
 105                         BKL_POWER_GPIO);
 106
 107         return 0;
 108 }
 109
 110 static int lpc32xx_clcd_mmap(struct clcd_fb *fb, struct vm_area_struct *vma)
 111 {
 112         return dma_mmap_writecombine(&fb->dev->dev, vma,
 113                 fb->fb.screen_base, fb->fb.fix.smem_start,
 114                 fb->fb.fix.smem_len);
 115 }
 116
 117 static void lpc32xx_clcd_remove(struct clcd_fb *fb)
 118 {
 119         dma_free_writecombine(&fb->dev->dev, fb->fb.fix.smem_len,
 120                 fb->fb.screen_base, fb->fb.fix.smem_start);
 121 }
 122
 123 /*
 124  * On some early LCD modules (1307.0), the backlight logic is inverted.
 125  * For those board variants, swap the disable and enable states for
 126  * BKL_POWER_GPIO.
 127 */
 128 static void clcd_disable(struct clcd_fb *fb)
 129 {
 130         gpio_set_value(BKL_POWER_GPIO, 0);
 131         gpio_set_value(LCD_POWER_GPIO, 0);
 132 }
 133
 134 static void clcd_enable(struct clcd_fb *fb)
 135 {
 136         gpio_set_value(BKL_POWER_GPIO, 1);
 137         gpio_set_value(LCD_POWER_GPIO, 1);
 138 }
 139
 140 static struct clcd_board lpc32xx_clcd_data = {
 141         .name           = "Phytec LCD",
 142         .check          = clcdfb_check,
 143         .decode         = clcdfb_decode,
 144         .disable        = clcd_disable,
 145         .enable         = clcd_enable,
 146         .setup          = lpc32xx_clcd_setup,
 147         .mmap           = lpc32xx_clcd_mmap,
 148         .remove         = lpc32xx_clcd_remove,
 149 };
 150
 151 static struct amba_device lpc32xx_clcd_device = {
 152         .dev                            = {
 153                 .coherent_dma_mask      = ~0,
 154                 .init_name              = "dev:clcd",
 155                 .platform_data          = &lpc32xx_clcd_data,
 156         },
 157         .res                            = {
 158                 .start                  = LPC32XX_LCD_BASE,
 159                 .end                    = (LPC32XX_LCD_BASE + SZ_4K - 1),
 160                 .flags                  = IORESOURCE_MEM,
 161         },
 162         .dma_mask                       = ~0,
 163         .irq                            = {IRQ_LPC32XX_LCD, NO_IRQ},
 164 };
 165
 166 /*
 167  * AMBA SSP (SPI)
 168  */
 169 static void phy3250_spi_cs_set(u32 control)
 170 {
 171         gpio_set_value(SPI0_CS_GPIO, (int) control);
 172 }
 173
 174 static struct pl022_config_chip spi0_chip_info = {
 175         .com_mode               = INTERRUPT_TRANSFER,
 176         .iface                  = SSP_INTERFACE_MOTOROLA_SPI,
 177         .hierarchy              = SSP_MASTER,
 178         .slave_tx_disable       = 0,
 179         .rx_lev_trig            = SSP_RX_4_OR_MORE_ELEM,
 180         .tx_lev_trig            = SSP_TX_4_OR_MORE_EMPTY_LOC,
 181         .ctrl_len               = SSP_BITS_8,
 182         .wait_state             = SSP_MWIRE_WAIT_ZERO,
 183         .duplex                 = SSP_MICROWIRE_CHANNEL_FULL_DUPLEX,
 184         .cs_control             = phy3250_spi_cs_set,
 185 };
 186
 187 static struct pl022_ssp_controller lpc32xx_ssp0_data = {
 188         .bus_id                 = 0,
 189         .num_chipselect         = 1,
 190         .enable_dma             = 0,
 191 };
 192
 193 static struct amba_device lpc32xx_ssp0_device = {
 194         .dev                            = {
 195                 .coherent_dma_mask      = ~0,
 196                 .init_name              = "dev:ssp0",
 197                 .platform_data          = &lpc32xx_ssp0_data,
 198         },
 199         .res                            = {
 200                 .start                  = LPC32XX_SSP0_BASE,
 201                 .end                    = (LPC32XX_SSP0_BASE + SZ_4K - 1),
 202                 .flags                  = IORESOURCE_MEM,
 203         },
 204         .dma_mask                       = ~0,
 205         .irq                            = {IRQ_LPC32XX_SSP0, NO_IRQ},
 206 };
 207
 208 /* AT25 driver registration */
 209 static int __init phy3250_spi_board_register(void)
 210 {
 211 #if defined(CONFIG_SPI_SPIDEV) || defined(CONFIG_SPI_SPIDEV_MODULE)
 212         static struct spi_board_info info[] = {
 213                 {
 214                         .modalias = "spidev",
 215                         .max_speed_hz = 5000000,
 216                         .bus_num = 0,
 217                         .chip_select = 0,
 218                         .controller_data = &spi0_chip_info,
 219                 },
 220         };
 221
 222 #else
 223         static struct spi_eeprom eeprom = {
 224                 .name = "at25256a",
 225                 .byte_len = 0x8000,
 226                 .page_size = 64,
 227                 .flags = EE_ADDR2,
 228         };
 229
 230         static struct spi_board_info info[] = {
 231                 {
 232                         .modalias = "at25",
 233                         .max_speed_hz = 5000000,
 234                         .bus_num = 0,
 235                         .chip_select = 0,
 236                         .mode = SPI_MODE_0,
 237                         .platform_data = &eeprom,
 238                         .controller_data = &spi0_chip_info,
 239                 },
 240         };
 241 #endif
 242         return spi_register_board_info(info, ARRAY_SIZE(info));
 243 }
 244 arch_initcall(phy3250_spi_board_register);
 245
 246 static struct i2c_board_info __initdata phy3250_i2c_board_info[] = {
 247         {
 248                 I2C_BOARD_INFO("pcf8563", 0x51),
 249         },
 250 };
 251
 252 static struct gpio_led phy_leds[] = {
 253         {
 254                 .name                   = "led0",
 255                 .gpio                   = LED_GPIO,
 256                 .active_low             = 1,
 257                 .default_trigger        = "heartbeat",
 258         },
 259 };
 260
 261 static struct gpio_led_platform_data led_data = {
 262         .leds = phy_leds,
 263         .num_leds = ARRAY_SIZE(phy_leds),
 264 };
 265
 266 static struct platform_device lpc32xx_gpio_led_device = {
 267         .name                   = "leds-gpio",
 268         .id                     = -1,
 269         .dev.platform_data      = &led_data,
 270 };
 271
 272 static struct platform_device *phy3250_devs[] __initdata = {
 273         &lpc32xx_i2c0_device,
 274         &lpc32xx_i2c1_device,
 275         &lpc32xx_i2c2_device,
 276         &lpc32xx_watchdog_device,
 277         &lpc32xx_gpio_led_device,
 278 };
 279
 280 static struct amba_device *amba_devs[] __initdata = {
 281         &lpc32xx_clcd_device,
 282         &lpc32xx_ssp0_device,
 283 };
 284
 285 /*
 286  * Board specific functions
 287  */
 288 static void __init phy3250_board_init(void)
 289 {
 290         u32 tmp;
 291         int i;
 292
 293         lpc32xx_gpio_init();
 294
 295         /* Register GPIOs used on this board */
 296         if (gpio_request(SPI0_CS_GPIO, "spi0 cs"))
 297                 printk(KERN_ERR "Error requesting gpio %u",
 298                         SPI0_CS_GPIO);
 299         else if (gpio_direction_output(SPI0_CS_GPIO, 1))
 300                 printk(KERN_ERR "Error setting gpio %u to output",
 301                         SPI0_CS_GPIO);
 302
 303         /* Setup network interface for RMII mode */
 304         tmp = __raw_readl(LPC32XX_CLKPWR_MACCLK_CTRL);
 305         tmp &= ~LPC32XX_CLKPWR_MACCTRL_PINS_MSK;
 306         tmp |= LPC32XX_CLKPWR_MACCTRL_USE_RMII_PINS;
 307         __raw_writel(tmp, LPC32XX_CLKPWR_MACCLK_CTRL);
 308
 309         /* Setup SLC NAND controller muxing */
 310         __raw_writel(LPC32XX_CLKPWR_NANDCLK_SEL_SLC,
 311                 LPC32XX_CLKPWR_NAND_CLK_CTRL);
 312
 313         /* Setup LCD muxing to RGB565 */
 314         tmp = __raw_readl(LPC32XX_CLKPWR_LCDCLK_CTRL) &
 315                 ~(LPC32XX_CLKPWR_LCDCTRL_LCDTYPE_MSK |
 316                 LPC32XX_CLKPWR_LCDCTRL_PSCALE_MSK);
 317         tmp |= LPC32XX_CLKPWR_LCDCTRL_LCDTYPE_TFT16;
 318         __raw_writel(tmp, LPC32XX_CLKPWR_LCDCLK_CTRL);
 319
 320         /* Set up I2C pull levels */
 321         tmp = __raw_readl(LPC32XX_CLKPWR_I2C_CLK_CTRL);
 322         tmp |= LPC32XX_CLKPWR_I2CCLK_USBI2CHI_DRIVE |
 323                 LPC32XX_CLKPWR_I2CCLK_I2C2HI_DRIVE;
 324         __raw_writel(tmp, LPC32XX_CLKPWR_I2C_CLK_CTRL);
 325
 326         /* Disable IrDA pulsing support on UART6 */
 327         tmp = __raw_readl(LPC32XX_UARTCTL_CTRL);
 328         tmp |= LPC32XX_UART_UART6_IRDAMOD_BYPASS;
 329         __raw_writel(tmp, LPC32XX_UARTCTL_CTRL);
 330
 331         /* Enable DMA for I2S1 channel */
 332         tmp = __raw_readl(LPC32XX_CLKPWR_I2S_CLK_CTRL);
 333         tmp = LPC32XX_CLKPWR_I2SCTRL_I2S1_USE_DMA;
 334         __raw_writel(tmp, LPC32XX_CLKPWR_I2S_CLK_CTRL);
 335
 336         lpc32xx_serial_init();
 337
 338         /*
 339          * AMBA peripheral clocks need to be enabled prior to AMBA device
 340          * detection or a data fault will occur, so enable the clocks
 341          * here. However, we don't want to enable them if the peripheral
 342          * isn't included in the image
 343          */
 344 #ifdef CONFIG_FB_ARMCLCD
 345         tmp = __raw_readl(LPC32XX_CLKPWR_LCDCLK_CTRL);
 346         __raw_writel((tmp | LPC32XX_CLKPWR_LCDCTRL_CLK_EN),
 347                 LPC32XX_CLKPWR_LCDCLK_CTRL);
 348 #endif
 349 #ifdef CONFIG_SPI_PL022
 350         tmp = __raw_readl(LPC32XX_CLKPWR_SSP_CLK_CTRL);
 351         __raw_writel((tmp | LPC32XX_CLKPWR_SSPCTRL_SSPCLK0_EN),
 352                 LPC32XX_CLKPWR_SSP_CLK_CTRL);
 353 #endif
 354
 355         platform_add_devices(phy3250_devs, ARRAY_SIZE(phy3250_devs));
 356         for (i = 0; i < ARRAY_SIZE(amba_devs); i++) {
 357                 struct amba_device *d = amba_devs[i];
 358                 amba_device_register(d, &iomem_resource);
 359         }
 360
 361         /* Test clock needed for UDA1380 initial init */
 362         __raw_writel(LPC32XX_CLKPWR_TESTCLK2_SEL_MOSC |
 363                 LPC32XX_CLKPWR_TESTCLK_TESTCLK2_EN,
 364                 LPC32XX_CLKPWR_TEST_CLK_SEL);
 365
 366         i2c_register_board_info(0, phy3250_i2c_board_info,
 367                 ARRAY_SIZE(phy3250_i2c_board_info));
 368 }
 369
 370 static int __init lpc32xx_display_uid(void)
 371 {
 372         u32 uid[4];
 373
 374         lpc32xx_get_uid(uid);
 375
 376         printk(KERN_INFO "LPC32XX unique ID: %08x%08x%08x%08x\n",
 377                 uid[3], uid[2], uid[1], uid[0]);
 378
 379         return 1;
 380 }
 381 arch_initcall(lpc32xx_display_uid);
 382
 383 MACHINE_START(PHY3250, "Phytec 3250 board with the LPC3250 Microcontroller")
 384         /* Maintainer: Kevin Wells, NXP Semiconductors */
 385         .boot_params    = 0x80000100,
 386         .map_io         = lpc32xx_map_io,
 387         .init_irq       = lpc32xx_init_irq,
 388         .timer          = &lpc32xx_timer,
 389         .init_machine   = phy3250_board_init,
 390 MACHINE_END