arch/arm/mach-imx/pcm970-baseboard.c

   1 /*
   2  * Copyright (C) 2008 Juergen Beisert (kernel@pengutronix.de)
   3  *
   4  * This program is free software; you can redistribute it and/or
   5  * modify it under the terms of the GNU General Public License
   6  * as published by the Free Software Foundation; either version 2
   7  * of the License, or (at your option) any later version.
   8  * This program is distributed in the hope that it will be useful,
   9  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  10  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  11  * GNU General Public License for more details.
  12  *
  13  * You should have received a copy of the GNU General Public License
  14  * along with this program; if not, write to the Free Software
  15  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
  16  * MA 02110-1301, USA.
  17  */
  18
  19 #include <linux/gpio.h>
  20 #include <linux/irq.h>
  21 #include <linux/platform_device.h>
  22 #include <linux/can/platform/sja1000.h>
  23
  24 #include <asm/mach/arch.h>
  25
  26 #include "common.h"
  27 #include "devices-imx27.h"
  28 #include "hardware.h"
  29 #include "iomux-mx27.h"
  30
  31 static const int pcm970_pins[] __initconst = {
  32         /* SDHC */
  33         PB4_PF_SD2_D0,
  34         PB5_PF_SD2_D1,
  35         PB6_PF_SD2_D2,
  36         PB7_PF_SD2_D3,
  37         PB8_PF_SD2_CMD,
  38         PB9_PF_SD2_CLK,
  39         /* display */
  40         PA5_PF_LSCLK,
  41         PA6_PF_LD0,
  42         PA7_PF_LD1,
  43         PA8_PF_LD2,
  44         PA9_PF_LD3,
  45         PA10_PF_LD4,
  46         PA11_PF_LD5,
  47         PA12_PF_LD6,
  48         PA13_PF_LD7,
  49         PA14_PF_LD8,
  50         PA15_PF_LD9,
  51         PA16_PF_LD10,
  52         PA17_PF_LD11,
  53         PA18_PF_LD12,
  54         PA19_PF_LD13,
  55         PA20_PF_LD14,
  56         PA21_PF_LD15,
  57         PA22_PF_LD16,
  58         PA23_PF_LD17,
  59         PA24_PF_REV,
  60         PA25_PF_CLS,
  61         PA26_PF_PS,
  62         PA27_PF_SPL_SPR,
  63         PA28_PF_HSYNC,
  64         PA29_PF_VSYNC,
  65         PA30_PF_CONTRAST,
  66         PA31_PF_OE_ACD,
  67         /*
  68          * it seems the data line misses a pullup, so we must enable
  69          * the internal pullup as a local workaround
  70          */
  71         PD17_PF_I2C_DATA | GPIO_PUEN,
  72         PD18_PF_I2C_CLK,
  73         /* Camera */
  74         PB10_PF_CSI_D0,
  75         PB11_PF_CSI_D1,
  76         PB12_PF_CSI_D2,
  77         PB13_PF_CSI_D3,
  78         PB14_PF_CSI_D4,
  79         PB15_PF_CSI_MCLK,
  80         PB16_PF_CSI_PIXCLK,
  81         PB17_PF_CSI_D5,
  82         PB18_PF_CSI_D6,
  83         PB19_PF_CSI_D7,
  84         PB20_PF_CSI_VSYNC,
  85         PB21_PF_CSI_HSYNC,
  86 };
  87
  88 static int pcm970_sdhc2_get_ro(struct device *dev)
  89 {
  90         return gpio_get_value(GPIO_PORTC + 28);
  91 }
  92
  93 static int pcm970_sdhc2_init(struct device *dev, irq_handler_t detect_irq, void *data)
  94 {
  95         int ret;
  96
  97         ret = request_irq(gpio_to_irq(IMX_GPIO_NR(3, 29)), detect_irq,
  98                           IRQF_TRIGGER_FALLING, "imx-mmc-detect", data);
  99         if (ret)
 100                 return ret;
 101
 102         ret = gpio_request(GPIO_PORTC + 28, "imx-mmc-ro");
 103         if (ret) {
 104                 free_irq(gpio_to_irq(IMX_GPIO_NR(3, 29)), data);
 105                 return ret;
 106         }
 107
 108         gpio_direction_input(GPIO_PORTC + 28);
 109
 110         return 0;
 111 }
 112
 113 static void pcm970_sdhc2_exit(struct device *dev, void *data)
 114 {
 115         free_irq(gpio_to_irq(IMX_GPIO_NR(3, 29)), data);
 116         gpio_free(GPIO_PORTC + 28);
 117 }
 118
 119 static const struct imxmmc_platform_data sdhc_pdata __initconst = {
 120         .get_ro = pcm970_sdhc2_get_ro,
 121         .init = pcm970_sdhc2_init,
 122         .exit = pcm970_sdhc2_exit,
 123 };
 124
 125 static struct imx_fb_videomode pcm970_modes[] = {
 126         {
 127                 .mode = {
 128                         .name           = "Sharp-LQ035Q7",
 129                         .refresh        = 60,
 130                         .xres           = 240,
 131                         .yres           = 320,
 132                         .pixclock       = 188679, /* in ps (5.3MHz) */
 133                         .hsync_len      = 7,
 134                         .left_margin    = 5,
 135                         .right_margin   = 16,
 136                         .vsync_len      = 1,
 137                         .upper_margin   = 7,
 138                         .lower_margin   = 9,
 139                 },
 140                 /*
 141                  * - HSYNC active high
 142                  * - VSYNC active high
 143                  * - clk notenabled while idle
 144                  * - clock not inverted
 145                  * - data not inverted
 146                  * - data enable low active
 147                  * - enable sharp mode
 148                  */
 149                 .pcr            = 0xF00080C0,
 150                 .bpp            = 16,
 151         }, {
 152                 .mode = {
 153                         .name           = "TX090",
 154                         .refresh        = 60,
 155                         .xres           = 240,
 156                         .yres           = 320,
 157                         .pixclock       = 38255,
 158                         .left_margin    = 144,
 159                         .right_margin   = 0,
 160                         .upper_margin   = 7,
 161                         .lower_margin   = 40,
 162                         .hsync_len      = 96,
 163                         .vsync_len      = 1,
 164                 },
 165                 /*
 166                  * - HSYNC active low (1 << 22)
 167                  * - VSYNC active low (1 << 23)
 168                  * - clk notenabled while idle
 169                  * - clock not inverted
 170                  * - data not inverted
 171                  * - data enable low active
 172                  * - enable sharp mode
 173                  */
 174                 .pcr = 0xF0008080 | (1<<22) | (1<<23) | (1<<19),
 175                 .bpp = 32,
 176         },
 177 };
 178
 179 static const struct imx_fb_platform_data pcm038_fb_data __initconst = {
 180         .mode = pcm970_modes,
 181         .num_modes = ARRAY_SIZE(pcm970_modes),
 182
 183         .pwmr           = 0x00A903FF,
 184         .lscr1          = 0x00120300,
 185         .dmacr          = 0x00020010,
 186 };
 187
 188 static struct resource pcm970_sja1000_resources[] = {
 189         {
 190                 .start   = MX27_CS4_BASE_ADDR,
 191                 .end     = MX27_CS4_BASE_ADDR + 0x100 - 1,
 192                 .flags   = IORESOURCE_MEM,
 193         }, {
 194                 /* irq number is run-time assigned */
 195                 .flags   = IORESOURCE_IRQ | IORESOURCE_IRQ_LOWEDGE,
 196         },
 197 };
 198
 199 static struct sja1000_platform_data pcm970_sja1000_platform_data = {
 200         .osc_freq       = 16000000,
 201         .ocr            = OCR_TX1_PULLDOWN | OCR_TX0_PUSHPULL,
 202         .cdr            = CDR_CBP,
 203 };
 204
 205 static struct platform_device pcm970_sja1000 = {
 206         .name = "sja1000_platform",
 207         .dev = {
 208                 .platform_data = &pcm970_sja1000_platform_data,
 209         },
 210         .resource = pcm970_sja1000_resources,
 211         .num_resources = ARRAY_SIZE(pcm970_sja1000_resources),
 212 };
 213
 214 /*
 215  * system init for baseboard usage. Will be called by pcm038 init.
 216  *
 217  * Add platform devices present on this baseboard and init
 218  * them from CPU side as far as required to use them later on
 219  */
 220 void __init pcm970_baseboard_init(void)
 221 {
 222         mxc_gpio_setup_multiple_pins(pcm970_pins, ARRAY_SIZE(pcm970_pins),
 223                         "PCM970");
 224
 225         imx27_add_imx_fb(&pcm038_fb_data);
 226         mxc_gpio_mode(GPIO_PORTC | 28 | GPIO_GPIO | GPIO_IN);
 227         imx27_add_mxc_mmc(1, &sdhc_pdata);
 228         pcm970_sja1000_resources[1].start = gpio_to_irq(IMX_GPIO_NR(5, 19));
 229         pcm970_sja1000_resources[1].end = gpio_to_irq(IMX_GPIO_NR(5, 19));
 230         platform_device_register(&pcm970_sja1000);
 231 }