arch/arm/mach-omap2/board-ldp.c

   1 /*
   2  * linux/arch/arm/mach-omap2/board-ldp.c
   3  *
   4  * Copyright (C) 2008 Texas Instruments Inc.
   5  * Nishant Kamat <nskamat@ti.com>
   6  *
   7  * Modified from mach-omap2/board-3430sdp.c
   8  *
   9  * This program is free software; you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License version 2 as
  11  * published by the Free Software Foundation.
  12  */
  13
  14 #include <linux/kernel.h>
  15 #include <linux/init.h>
  16 #include <linux/platform_device.h>
  17 #include <linux/delay.h>
  18 #include <linux/input.h>
  19 #include <linux/workqueue.h>
  20 #include <linux/err.h>
  21 #include <linux/clk.h>
  22 #include <linux/spi/spi.h>
  23 #include <linux/spi/ads7846.h>
  24 #include <linux/i2c/twl4030.h>
  25
  26 #include <mach/hardware.h>
  27 #include <asm/mach-types.h>
  28 #include <asm/mach/arch.h>
  29 #include <asm/mach/map.h>
  30
  31 #include <mach/board-ldp.h>
  32 #include <mach/mcspi.h>
  33 #include <mach/gpio.h>
  34 #include <mach/board.h>
  35 #include <mach/common.h>
  36 #include <mach/gpmc.h>
  37 #include <mach/hsmmc.h>
  38 #include <mach/usb-musb.h>
  39
  40 #include <asm/io.h>
  41 #include <asm/delay.h>
  42 #include <mach/control.h>
  43
  44 #define ENABLE_VAUX1_DEDICATED  0x03
  45 #define ENABLE_VAUX1_DEV_GRP    0x20
  46
  47 #define TWL4030_MSECURE_GPIO    22
  48
  49 static int ts_gpio;
  50
  51 static int __init msecure_init(void)
  52 {
  53         int ret = 0;
  54
  55 #ifdef CONFIG_RTC_DRV_TWL4030
  56         /* 3430ES2.0 doesn't have msecure/gpio-22 line connected to T2 */
  57         if (is_device_type_gp() && is_sil_rev_less_than(OMAP3430_REV_ES2_0)) {
  58                 u32 msecure_pad_config_reg = omap_ctrl_base_get() + 0xA3C;
  59                 int mux_mask = 0x04;
  60                 u16 tmp;
  61
  62                 ret = gpio_request(TWL4030_MSECURE_GPIO, "msecure");
  63                 if (ret < 0) {
  64                         printk(KERN_ERR "msecure_init: can't"
  65                                 "reserve GPIO:%d !\n", TWL4030_MSECURE_GPIO);
  66                         goto out;
  67                 }
  68                 /*
  69                  * TWL4030 will be in secure mode if msecure line from OMAP
  70                  * is low. Make msecure line high in order to change the
  71                  * TWL4030 RTC time and calender registers.
  72                  */
  73
  74                 tmp = omap_readw(msecure_pad_config_reg);
  75                 tmp &= 0xF8;    /* To enable mux mode 03/04 = GPIO_RTC */
  76                 tmp |= mux_mask;/* To enable mux mode 03/04 = GPIO_RTC */
  77                 omap_writew(tmp, msecure_pad_config_reg);
  78
  79                 gpio_direction_output(TWL4030_MSECURE_GPIO, 1);
  80         }
  81 out:
  82 #endif
  83         return ret;
  84 }
  85
  86 /**
  87  * @brief ads7846_dev_init : Requests & sets GPIO line for pen-irq
  88  *
  89  * @return - void. If request gpio fails then Flag KERN_ERR.
  90  */
  91 static void ads7846_dev_init(void)
  92 {
  93         if (omap_request_gpio(ts_gpio) < 0) {
  94                 printk(KERN_ERR "can't get ads746 pen down GPIO\n");
  95                 return;
  96         }
  97
  98         omap_set_gpio_direction(ts_gpio, 1);
  99
 100         omap_set_gpio_debounce(ts_gpio, 1);
 101         omap_set_gpio_debounce_time(ts_gpio, 0xa);
 102 }
 103
 104 static int ads7846_get_pendown_state(void)
 105 {
 106         return !omap_get_gpio_datain(ts_gpio);
 107 }
 108
 109 /*
 110  * This enable(1)/disable(0) the voltage for TS: uses twl4030 calls
 111  */
 112 static int ads7846_vaux_control(int vaux_cntrl)
 113 {
 114         int ret = 0;
 115
 116 #ifdef CONFIG_TWL4030_CORE
 117         /* check for return value of ldo_use: if success it returns 0 */
 118         if (vaux_cntrl == VAUX_ENABLE) {
 119                 if (ret != twl4030_i2c_write_u8(TWL4030_MODULE_PM_RECEIVER,
 120                         ENABLE_VAUX1_DEDICATED, TWL4030_VAUX1_DEDICATED))
 121                         return -EIO;
 122                 if (ret != twl4030_i2c_write_u8(TWL4030_MODULE_PM_RECEIVER,
 123                         ENABLE_VAUX1_DEV_GRP, TWL4030_VAUX1_DEV_GRP))
 124                         return -EIO;
 125         } else if (vaux_cntrl == VAUX_DISABLE) {
 126                 if (ret != twl4030_i2c_write_u8(TWL4030_MODULE_PM_RECEIVER,
 127                         0x00, TWL4030_VAUX1_DEDICATED))
 128                         return -EIO;
 129                 if (ret != twl4030_i2c_write_u8(TWL4030_MODULE_PM_RECEIVER,
 130                         0x00, TWL4030_VAUX1_DEV_GRP))
 131                         return -EIO;
 132         }
 133 #else
 134         ret = -EIO;
 135 #endif
 136         return ret;
 137 }
 138
 139 static struct ads7846_platform_data tsc2046_config __initdata = {
 140         .get_pendown_state      = ads7846_get_pendown_state,
 141         .keep_vref_on           = 1,
 142         .vaux_control           = ads7846_vaux_control,
 143 };
 144
 145
 146 static struct omap2_mcspi_device_config tsc2046_mcspi_config = {
 147         .turbo_mode     = 0,
 148         .single_channel = 1,  /* 0: slave, 1: master */
 149 };
 150
 151 static struct spi_board_info ldp_spi_board_info[] __initdata = {
 152         [0] = {
 153                 /*
 154                  * TSC2046 operates at a max freqency of 2MHz, so
 155                  * operate slightly below at 1.5MHz
 156                  */
 157                 .modalias               = "ads7846",
 158                 .bus_num                = 1,
 159                 .chip_select            = 0,
 160                 .max_speed_hz           = 1500000,
 161                 .controller_data        = &tsc2046_mcspi_config,
 162                 .irq                    = 0,
 163                 .platform_data          = &tsc2046_config,
 164         },
 165 };
 166
 167 static struct platform_device *ldp_devices[] __initdata = {
 168 };
 169
 170 static void __init omap_ldp_init_irq(void)
 171 {
 172         omap2_init_common_hw(NULL);
 173         omap_init_irq();
 174         omap_gpio_init();
 175 }
 176
 177 static struct omap_uart_config ldp_uart_config __initdata = {
 178         .enabled_uarts  = ((1 << 0) | (1 << 1) | (1 << 2)),
 179 };
 180
 181 static struct omap_board_config_kernel ldp_config[] __initdata = {
 182         { OMAP_TAG_UART,        &ldp_uart_config },
 183 };
 184
 185 static int __init omap_i2c_init(void)
 186 {
 187         omap_register_i2c_bus(1, 2600, NULL, 0);
 188         omap_register_i2c_bus(2, 400, NULL, 0);
 189         omap_register_i2c_bus(3, 400, NULL, 0);
 190         return 0;
 191 }
 192
 193 static void __init omap_ldp_init(void)
 194 {
 195         omap_i2c_init();
 196         platform_add_devices(ldp_devices, ARRAY_SIZE(ldp_devices));
 197         omap_board_config = ldp_config;
 198         omap_board_config_size = ARRAY_SIZE(ldp_config);
 199         ts_gpio = 54;
 200         ldp_spi_board_info[0].irq = OMAP_GPIO_IRQ(ts_gpio);
 201         spi_register_board_info(ldp_spi_board_info,
 202                                 ARRAY_SIZE(ldp_spi_board_info));
 203         msecure_init();
 204         ads7846_dev_init();
 205         twl4030_bci_battery_init();
 206         omap_serial_init();
 207         usb_musb_init();
 208         hsmmc_init();
 209 }
 210
 211 static void __init omap_ldp_map_io(void)
 212 {
 213         omap2_set_globals_343x();
 214         omap2_map_common_io();
 215 }
 216
 217 MACHINE_START(OMAP_LDP, "OMAP LDP board")
 218         .phys_io        = 0x48000000,
 219         .io_pg_offst    = ((0xd8000000) >> 18) & 0xfffc,
 220         .boot_params    = 0x80000100,
 221         .map_io         = omap_ldp_map_io,
 222         .init_irq       = omap_ldp_init_irq,
 223         .init_machine   = omap_ldp_init,
 224         .timer          = &omap_timer,
 225 MACHINE_END