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/gpio.h>
  20 #include <linux/irq.h>
  21 #include <linux/platform_device.h>
  22
  23 #include <asm/mach/arch.h>
  24
  25 #include <mach/common.h>
  26 #include <mach/iomux.h>
  27 #include <mach/imxfb.h>
  28 #include <mach/hardware.h>
  29 #include <mach/mmc.h>
  30
  31 #include "devices.h"
  32
  33 static int pcm970_pins[] = {
  34         /* SDHC */
  35         PB4_PF_SD2_D0,
  36         PB5_PF_SD2_D1,
  37         PB6_PF_SD2_D2,
  38         PB7_PF_SD2_D3,
  39         PB8_PF_SD2_CMD,
  40         PB9_PF_SD2_CLK,
  41         GPIO_PORTC | 28 | GPIO_GPIO | GPIO_IN, /* card detect */
  42         /* display */
  43         PA5_PF_LSCLK,
  44         PA6_PF_LD0,
  45         PA7_PF_LD1,
  46         PA8_PF_LD2,
  47         PA9_PF_LD3,
  48         PA10_PF_LD4,
  49         PA11_PF_LD5,
  50         PA12_PF_LD6,
  51         PA13_PF_LD7,
  52         PA14_PF_LD8,
  53         PA15_PF_LD9,
  54         PA16_PF_LD10,
  55         PA17_PF_LD11,
  56         PA18_PF_LD12,
  57         PA19_PF_LD13,
  58         PA20_PF_LD14,
  59         PA21_PF_LD15,
  60         PA22_PF_LD16,
  61         PA23_PF_LD17,
  62         PA24_PF_REV,
  63         PA25_PF_CLS,
  64         PA26_PF_PS,
  65         PA27_PF_SPL_SPR,
  66         PA28_PF_HSYNC,
  67         PA29_PF_VSYNC,
  68         PA30_PF_CONTRAST,
  69         PA31_PF_OE_ACD,
  70         /*
  71          * it seems the data line misses a pullup, so we must enable
  72          * the internal pullup as a local workaround
  73          */
  74         PD17_PF_I2C_DATA | GPIO_PUEN,
  75         PD18_PF_I2C_CLK,
  76         /* Camera */
  77         PB10_PF_CSI_D0,
  78         PB11_PF_CSI_D1,
  79         PB12_PF_CSI_D2,
  80         PB13_PF_CSI_D3,
  81         PB14_PF_CSI_D4,
  82         PB15_PF_CSI_MCLK,
  83         PB16_PF_CSI_PIXCLK,
  84         PB17_PF_CSI_D5,
  85         PB18_PF_CSI_D6,
  86         PB19_PF_CSI_D7,
  87         PB20_PF_CSI_VSYNC,
  88         PB21_PF_CSI_HSYNC,
  89 };
  90
  91 static int pcm970_sdhc2_get_ro(struct device *dev)
  92 {
  93         return gpio_get_value(GPIO_PORTC + 28);
  94 }
  95
  96 static int pcm970_sdhc2_init(struct device *dev, irq_handler_t detect_irq, void *data)
  97 {
  98         int ret;
  99
 100         ret = request_irq(IRQ_GPIOC(29), detect_irq, IRQF_TRIGGER_FALLING,
 101                                 "imx-mmc-detect", data);
 102         if (ret)
 103                 return ret;
 104
 105         ret = gpio_request(GPIO_PORTC + 28, "imx-mmc-ro");
 106         if (ret) {
 107                 free_irq(IRQ_GPIOC(29), data);
 108                 return ret;
 109         }
 110
 111         gpio_direction_input(GPIO_PORTC + 28);
 112
 113         return 0;
 114 }
 115
 116 static void pcm970_sdhc2_exit(struct device *dev, void *data)
 117 {
 118         free_irq(IRQ_GPIOC(29), data);
 119         gpio_free(GPIO_PORTC + 28);
 120 }
 121
 122 static struct imxmmc_platform_data sdhc_pdata = {
 123         .get_ro = pcm970_sdhc2_get_ro,
 124         .init = pcm970_sdhc2_init,
 125         .exit = pcm970_sdhc2_exit,
 126 };
 127
 128 /*
 129  * Connected is a portrait Sharp-QVGA display
 130  * of type: LQ035Q7DH06
 131  */
 132 static struct imx_fb_platform_data pcm038_fb_data = {
 133         .pixclock       = 188679, /* in ps (5.3MHz) */
 134         .xres           = 240,
 135         .yres           = 320,
 136
 137         .bpp            = 16,
 138         .hsync_len      = 7,
 139         .left_margin    = 5,
 140         .right_margin   = 16,
 141
 142         .vsync_len      = 1,
 143         .upper_margin   = 7,
 144         .lower_margin   = 9,
 145         .fixed_screen_cpu = 0,
 146
 147         /*
 148          * - HSYNC active high
 149          * - VSYNC active high
 150          * - clk notenabled while idle
 151          * - clock not inverted
 152          * - data not inverted
 153          * - data enable low active
 154          * - enable sharp mode
 155          */
 156         .pcr            = 0xFA0080C0,
 157         .pwmr           = 0x00A903FF,
 158         .lscr1          = 0x00120300,
 159         .dmacr          = 0x00020010,
 160 };
 161
 162 /*
 163  * system init for baseboard usage. Will be called by pcm038 init.
 164  *
 165  * Add platform devices present on this baseboard and init
 166  * them from CPU side as far as required to use them later on
 167  */
 168 void __init pcm970_baseboard_init(void)
 169 {
 170         mxc_gpio_setup_multiple_pins(pcm970_pins, ARRAY_SIZE(pcm970_pins),
 171                         "PCM970");
 172
 173         mxc_register_device(&mxc_fb_device, &pcm038_fb_data);
 174         mxc_register_device(&mxc_sdhc_device1, &sdhc_pdata);
 175 }