arch/arm/mach-omap2/common-board-devices.c

   1 /*
   2  * common-board-devices.c
   3  *
   4  * Copyright (C) 2011 CompuLab, Ltd.
   5  * Author: Mike Rapoport <mike@compulab.co.il>
   6  *
   7  * This program is free software; you can redistribute it and/or
   8  * modify it under the terms of the GNU General Public License
   9  * version 2 as published by the Free Software Foundation.
  10  *
  11  * This program is distributed in the hope that it will be useful, but
  12  * WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * along with this program; if not, write to the Free Software
  18  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
  19  * 02110-1301 USA
  20  *
  21  */
  22
  23 #include <linux/i2c.h>
  24 #include <linux/i2c/twl.h>
  25
  26 #include <linux/gpio.h>
  27 #include <linux/spi/spi.h>
  28 #include <linux/spi/ads7846.h>
  29
  30 #include <plat/i2c.h>
  31 #include <plat/mcspi.h>
  32 #include <plat/nand.h>
  33
  34 #include "common-board-devices.h"
  35
  36 static struct i2c_board_info __initdata pmic_i2c_board_info = {
  37         .addr           = 0x48,
  38         .flags          = I2C_CLIENT_WAKE,
  39 };
  40
  41 void __init omap_pmic_init(int bus, u32 clkrate,
  42                            const char *pmic_type, int pmic_irq,
  43                            struct twl4030_platform_data *pmic_data)
  44 {
  45         strncpy(pmic_i2c_board_info.type, pmic_type,
  46                 sizeof(pmic_i2c_board_info.type));
  47         pmic_i2c_board_info.irq = pmic_irq;
  48         pmic_i2c_board_info.platform_data = pmic_data;
  49
  50         omap_register_i2c_bus(bus, clkrate, &pmic_i2c_board_info, 1);
  51 }
  52
  53 #if defined(CONFIG_TOUCHSCREEN_ADS7846) || \
  54         defined(CONFIG_TOUCHSCREEN_ADS7846_MODULE)
  55 static struct omap2_mcspi_device_config ads7846_mcspi_config = {
  56         .turbo_mode     = 0,
  57         .single_channel = 1,    /* 0: slave, 1: master */
  58 };
  59
  60 static struct ads7846_platform_data ads7846_config = {
  61         .x_max                  = 0x0fff,
  62         .y_max                  = 0x0fff,
  63         .x_plate_ohms           = 180,
  64         .pressure_max           = 255,
  65         .debounce_max           = 10,
  66         .debounce_tol           = 3,
  67         .debounce_rep           = 1,
  68         .gpio_pendown           = -EINVAL,
  69         .keep_vref_on           = 1,
  70 };
  71
  72 static struct spi_board_info ads7846_spi_board_info __initdata = {
  73         .modalias               = "ads7846",
  74         .bus_num                = -EINVAL,
  75         .chip_select            = 0,
  76         .max_speed_hz           = 1500000,
  77         .controller_data        = &ads7846_mcspi_config,
  78         .irq                    = -EINVAL,
  79         .platform_data          = &ads7846_config,
  80 };
  81
  82 void __init omap_ads7846_init(int bus_num, int gpio_pendown, int gpio_debounce,
  83                               struct ads7846_platform_data *board_pdata)
  84 {
  85         struct spi_board_info *spi_bi = &ads7846_spi_board_info;
  86         int err;
  87
  88         if (board_pdata && board_pdata->get_pendown_state) {
  89                 err = gpio_request_one(gpio_pendown, GPIOF_IN, "TSPenDown");
  90                 if (err) {
  91                         pr_err("Couldn't obtain gpio for TSPenDown: %d\n", err);
  92                         return;
  93                 }
  94                 gpio_export(gpio_pendown, 0);
  95
  96                 if (gpio_debounce)
  97                         gpio_set_debounce(gpio_pendown, gpio_debounce);
  98         }
  99
 100         ads7846_config.gpio_pendown = gpio_pendown;
 101
 102         spi_bi->bus_num = bus_num;
 103         spi_bi->irq     = OMAP_GPIO_IRQ(gpio_pendown);
 104
 105         if (board_pdata)
 106                 spi_bi->platform_data = board_pdata;
 107
 108         spi_register_board_info(&ads7846_spi_board_info, 1);
 109 }
 110 #else
 111 void __init omap_ads7846_init(int bus_num, int gpio_pendown, int gpio_debounce,
 112                               struct ads7846_platform_data *board_pdata)
 113 {
 114 }
 115 #endif
 116
 117 #if defined(CONFIG_MTD_NAND_OMAP2) || defined(CONFIG_MTD_NAND_OMAP2_MODULE)
 118 static struct omap_nand_platform_data nand_data = {
 119         .dma_channel    = -1,           /* disable DMA in OMAP NAND driver */
 120 };
 121
 122 void __init omap_nand_flash_init(int options, struct mtd_partition *parts,
 123                                  int nr_parts)
 124 {
 125         u8 cs = 0;
 126         u8 nandcs = GPMC_CS_NUM + 1;
 127
 128         /* find out the chip-select on which NAND exists */
 129         while (cs < GPMC_CS_NUM) {
 130                 u32 ret = 0;
 131                 ret = gpmc_cs_read_reg(cs, GPMC_CS_CONFIG1);
 132
 133                 if ((ret & 0xC00) == 0x800) {
 134                         printk(KERN_INFO "Found NAND on CS%d\n", cs);
 135                         if (nandcs > GPMC_CS_NUM)
 136                                 nandcs = cs;
 137                 }
 138                 cs++;
 139         }
 140
 141         if (nandcs > GPMC_CS_NUM) {
 142                 printk(KERN_INFO "NAND: Unable to find configuration "
 143                                  "in GPMC\n ");
 144                 return;
 145         }
 146
 147         if (nandcs < GPMC_CS_NUM) {
 148                 nand_data.cs = nandcs;
 149                 nand_data.parts = parts;
 150                 nand_data.nr_parts = nr_parts;
 151                 nand_data.options = options;
 152
 153                 printk(KERN_INFO "Registering NAND on CS%d\n", nandcs);
 154                 if (gpmc_nand_init(&nand_data) < 0)
 155                         printk(KERN_ERR "Unable to register NAND device\n");
 156         }
 157 }
 158 #else
 159 void __init omap_nand_flash_init(int options, struct mtd_partition *parts,
 160                                  int nr_parts)
 161 {
 162 }
 163 #endif