arch/arm/mach-mx2/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/platform_device.h>
  20 #include <linux/gpio.h>
  21 #include <linux/irq.h>
  22
  23 #include <asm/mach/arch.h>
  24
  25 #include <mach/hardware.h>
  26 #include <mach/common.h>
  27 #include <mach/mmc.h>
  28 #include <mach/imxfb.h>
  29 #include <mach/iomux.h>
  30
  31 #include "devices.h"
  32
  33 static int pcm970_sdhc2_get_ro(struct device *dev)
  34 {
  35         return gpio_get_value(GPIO_PORTC + 28);
  36 }
  37
  38 static int pcm970_sdhc2_pins[] = {
  39         PB4_PF_SD2_D0,
  40         PB5_PF_SD2_D1,
  41         PB6_PF_SD2_D2,
  42         PB7_PF_SD2_D3,
  43         PB8_PF_SD2_CMD,
  44         PB9_PF_SD2_CLK,
  45 };
  46
  47 static int pcm970_sdhc2_init(struct device *dev, irq_handler_t detect_irq, void *data)
  48 {
  49         int ret;
  50
  51         ret = mxc_gpio_setup_multiple_pins(pcm970_sdhc2_pins,
  52                 ARRAY_SIZE(pcm970_sdhc2_pins), "sdhc2");
  53         if(ret)
  54                 return ret;
  55
  56         ret = request_irq(IRQ_GPIOC(29), detect_irq, 0,
  57                                 "imx-mmc-detect", data);
  58         if (ret)
  59                 goto out_release_gpio;
  60
  61         set_irq_type(IRQ_GPIOC(29), IRQF_TRIGGER_FALLING);
  62
  63         ret = gpio_request(GPIO_PORTC + 28, "imx-mmc-ro");
  64         if (ret)
  65                 goto out_release_gpio;
  66
  67         mxc_gpio_mode((GPIO_PORTC | 28) | GPIO_GPIO | GPIO_IN);
  68         gpio_direction_input(GPIO_PORTC + 28);
  69
  70         return 0;
  71
  72 out_release_gpio:
  73         mxc_gpio_release_multiple_pins(pcm970_sdhc2_pins,
  74                         ARRAY_SIZE(pcm970_sdhc2_pins));
  75         return ret;
  76 }
  77
  78 static void pcm970_sdhc2_exit(struct device *dev, void *data)
  79 {
  80         free_irq(IRQ_GPIOC(29), data);
  81         gpio_free(GPIO_PORTC + 28);
  82         mxc_gpio_release_multiple_pins(pcm970_sdhc2_pins,
  83                         ARRAY_SIZE(pcm970_sdhc2_pins));
  84 }
  85
  86 static struct imxmmc_platform_data sdhc_pdata = {
  87         .get_ro = pcm970_sdhc2_get_ro,
  88         .init = pcm970_sdhc2_init,
  89         .exit = pcm970_sdhc2_exit,
  90 };
  91
  92 static int mxc_fb_pins[] = {
  93         PA5_PF_LSCLK,   PA6_PF_LD0,     PA7_PF_LD1,     PA8_PF_LD2,
  94         PA9_PF_LD3,     PA10_PF_LD4,    PA11_PF_LD5,    PA12_PF_LD6,
  95         PA13_PF_LD7,    PA14_PF_LD8,    PA15_PF_LD9,    PA16_PF_LD10,
  96         PA17_PF_LD11,   PA18_PF_LD12,   PA19_PF_LD13,   PA20_PF_LD14,
  97         PA21_PF_LD15,   PA22_PF_LD16,   PA23_PF_LD17,   PA24_PF_REV,
  98         PA25_PF_CLS,    PA26_PF_PS,     PA27_PF_SPL_SPR, PA28_PF_HSYNC,
  99         PA29_PF_VSYNC,  PA30_PF_CONTRAST, PA31_PF_OE_ACD
 100 };
 101
 102 static int pcm038_fb_init(struct platform_device *pdev)
 103 {
 104         return mxc_gpio_setup_multiple_pins(mxc_fb_pins,
 105                         ARRAY_SIZE(mxc_fb_pins), "FB");
 106 }
 107
 108 static int pcm038_fb_exit(struct platform_device *pdev)
 109 {
 110         mxc_gpio_release_multiple_pins(mxc_fb_pins, ARRAY_SIZE(mxc_fb_pins));
 111
 112         return 0;
 113 }
 114
 115 /*
 116  * Connected is a portrait Sharp-QVGA display
 117  * of type: LQ035Q7DH06
 118  */
 119 static struct imx_fb_platform_data pcm038_fb_data = {
 120         .pixclock       = 188679, /* in ps (5.3MHz) */
 121         .xres           = 240,
 122         .yres           = 320,
 123
 124         .bpp            = 16,
 125         .hsync_len      = 7,
 126         .left_margin    = 5,
 127         .right_margin   = 16,
 128
 129         .vsync_len      = 1,
 130         .upper_margin   = 7,
 131         .lower_margin   = 9,
 132         .fixed_screen_cpu = 0,
 133
 134         /*
 135          * - HSYNC active high
 136          * - VSYNC active high
 137          * - clk notenabled while idle
 138          * - clock not inverted
 139          * - data not inverted
 140          * - data enable low active
 141          * - enable sharp mode
 142          */
 143         .pcr            = 0xFA0080C0,
 144         .pwmr           = 0x00A903FF,
 145         .lscr1          = 0x00120300,
 146         .dmacr          = 0x00020010,
 147
 148         .init = pcm038_fb_init,
 149         .exit = pcm038_fb_exit,
 150 };
 151
 152 /*
 153  * system init for baseboard usage. Will be called by pcm038 init.
 154  *
 155  * Add platform devices present on this baseboard and init
 156  * them from CPU side as far as required to use them later on
 157  */
 158 void __init pcm970_baseboard_init(void)
 159 {
 160         mxc_register_device(&mxc_fb_device, &pcm038_fb_data);
 161         mxc_register_device(&mxc_sdhc_device1, &sdhc_pdata);
 162 }