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 #include <linux/i2c/twl4030-rtc.h>
  26
  27 #include <mach/hardware.h>
  28 #include <asm/mach-types.h>
  29 #include <asm/mach/arch.h>
  30 #include <asm/mach/map.h>
  31
  32 #include <mach/board-ldp.h>
  33 #include <mach/mcspi.h>
  34 #include <mach/gpio.h>
  35 #include <mach/board.h>
  36 #include <mach/common.h>
  37 #include <mach/gpmc.h>
  38 #include <mach/hsmmc.h>
  39 #include <mach/usb-musb.h>
  40
  41 #include <asm/io.h>
  42 #include <asm/delay.h>
  43 #include <mach/control.h>
  44
  45 #define ENABLE_VAUX1_DEDICATED  0x03
  46 #define ENABLE_VAUX1_DEV_GRP    0x20
  47
  48 #define TWL4030_MSECURE_GPIO    22
  49
  50 static int ts_gpio;
  51
  52 #ifdef CONFIG_RTC_DRV_TWL4030
  53 static int twl4030_rtc_init(void)
  54 {
  55         int ret = 0;
  56
  57         /* 3430ES2.0 doesn't have msecure/gpio-22 line connected to T2 */
  58         if (is_device_type_gp() && is_sil_rev_less_than(OMAP3430_REV_ES2_0)) {
  59                 u32 msecure_pad_config_reg = omap_ctrl_base_get() + 0xA3C;
  60                 int mux_mask = 0x04;
  61                 u16 tmp;
  62
  63                 ret = omap_request_gpio(TWL4030_MSECURE_GPIO);
  64                 if (ret < 0) {
  65                         printk(KERN_ERR "twl4030_rtc_init: can't"
  66                                 "reserve GPIO:%d !\n", TWL4030_MSECURE_GPIO);
  67                         goto out;
  68                 }
  69                 /*
  70                  * TWL4030 will be in secure mode if msecure line from OMAP
  71                  * is low. Make msecure line high in order to change the
  72                  * TWL4030 RTC time and calender registers.
  73                  */
  74                 omap_set_gpio_direction(TWL4030_MSECURE_GPIO, 0);
  75
  76                 tmp = omap_readw(msecure_pad_config_reg);
  77                 tmp &= 0xF8;    /* To enable mux mode 03/04 = GPIO_RTC */
  78                 tmp |= mux_mask;/* To enable mux mode 03/04 = GPIO_RTC */
  79                 omap_writew(tmp, msecure_pad_config_reg);
  80
  81                 omap_set_gpio_dataout(TWL4030_MSECURE_GPIO, 1);
  82         }
  83 out:
  84         return ret;
  85 }
  86
  87 static void twl4030_rtc_exit(void)
  88 {
  89         omap_free_gpio(TWL4030_MSECURE_GPIO);
  90 }
  91
  92 static struct twl4030rtc_platform_data ldp_twl4030rtc_data = {
  93         .init = &twl4030_rtc_init,
  94         .exit = &twl4030_rtc_exit,
  95 };
  96
  97 static struct platform_device ldp_twl4030rtc_device = {
  98         .name           = "twl4030_rtc",
  99         .id             = -1,
 100         .dev            = {
 101                 .platform_data  = &ldp_twl4030rtc_data,
 102         },
 103 };
 104 #endif
 105
 106 /**
 107  * @brief ads7846_dev_init : Requests & sets GPIO line for pen-irq
 108  *
 109  * @return - void. If request gpio fails then Flag KERN_ERR.
 110  */
 111 static void ads7846_dev_init(void)
 112 {
 113         if (omap_request_gpio(ts_gpio) < 0) {
 114                 printk(KERN_ERR "can't get ads746 pen down GPIO\n");
 115                 return;
 116         }
 117
 118         omap_set_gpio_direction(ts_gpio, 1);
 119
 120         omap_set_gpio_debounce(ts_gpio, 1);
 121         omap_set_gpio_debounce_time(ts_gpio, 0xa);
 122 }
 123
 124 static int ads7846_get_pendown_state(void)
 125 {
 126         return !omap_get_gpio_datain(ts_gpio);
 127 }
 128
 129 /*
 130  * This enable(1)/disable(0) the voltage for TS: uses twl4030 calls
 131  */
 132 static int ads7846_vaux_control(int vaux_cntrl)
 133 {
 134         int ret = 0;
 135
 136 #ifdef CONFIG_TWL4030_CORE
 137         /* check for return value of ldo_use: if success it returns 0 */
 138         if (vaux_cntrl == VAUX_ENABLE) {
 139                 if (ret != twl4030_i2c_write_u8(TWL4030_MODULE_PM_RECEIVER,
 140                         ENABLE_VAUX1_DEDICATED, TWL4030_VAUX1_DEDICATED))
 141                         return -EIO;
 142                 if (ret != twl4030_i2c_write_u8(TWL4030_MODULE_PM_RECEIVER,
 143                         ENABLE_VAUX1_DEV_GRP, TWL4030_VAUX1_DEV_GRP))
 144                         return -EIO;
 145         } else if (vaux_cntrl == VAUX_DISABLE) {
 146                 if (ret != twl4030_i2c_write_u8(TWL4030_MODULE_PM_RECEIVER,
 147                         0x00, TWL4030_VAUX1_DEDICATED))
 148                         return -EIO;
 149                 if (ret != twl4030_i2c_write_u8(TWL4030_MODULE_PM_RECEIVER,
 150                         0x00, TWL4030_VAUX1_DEV_GRP))
 151                         return -EIO;
 152         }
 153 #else
 154         ret = -EIO;
 155 #endif
 156         return ret;
 157 }
 158
 159 static struct ads7846_platform_data tsc2046_config __initdata = {
 160         .get_pendown_state      = ads7846_get_pendown_state,
 161         .keep_vref_on           = 1,
 162         .vaux_control           = ads7846_vaux_control,
 163 };
 164
 165
 166 static struct omap2_mcspi_device_config tsc2046_mcspi_config = {
 167         .turbo_mode     = 0,
 168         .single_channel = 1,  /* 0: slave, 1: master */
 169 };
 170
 171 static struct spi_board_info ldp_spi_board_info[] __initdata = {
 172         [0] = {
 173                 /*
 174                  * TSC2046 operates at a max freqency of 2MHz, so
 175                  * operate slightly below at 1.5MHz
 176                  */
 177                 .modalias               = "ads7846",
 178                 .bus_num                = 1,
 179                 .chip_select            = 0,
 180                 .max_speed_hz           = 1500000,
 181                 .controller_data        = &tsc2046_mcspi_config,
 182                 .irq                    = 0,
 183                 .platform_data          = &tsc2046_config,
 184         },
 185 };
 186
 187 static struct platform_device *ldp_devices[] __initdata = {
 188 #ifdef CONFIG_RTC_DRV_TWL4030
 189         &ldp_twl4030rtc_device,
 190 #endif
 191 };
 192
 193 static void __init omap_ldp_init_irq(void)
 194 {
 195         omap2_init_common_hw(NULL);
 196         omap_init_irq();
 197         omap_gpio_init();
 198 }
 199
 200 static struct omap_uart_config ldp_uart_config __initdata = {
 201         .enabled_uarts  = ((1 << 0) | (1 << 1) | (1 << 2)),
 202 };
 203
 204 static struct omap_board_config_kernel ldp_config[] __initdata = {
 205         { OMAP_TAG_UART,        &ldp_uart_config },
 206 };
 207
 208 static int __init omap_i2c_init(void)
 209 {
 210         omap_register_i2c_bus(1, 2600, NULL, 0);
 211         omap_register_i2c_bus(2, 400, NULL, 0);
 212         omap_register_i2c_bus(3, 400, NULL, 0);
 213         return 0;
 214 }
 215
 216 static void __init omap_ldp_init(void)
 217 {
 218         omap_i2c_init();
 219         platform_add_devices(ldp_devices, ARRAY_SIZE(ldp_devices));
 220         omap_board_config = ldp_config;
 221         omap_board_config_size = ARRAY_SIZE(ldp_config);
 222         ts_gpio = 54;
 223         ldp_spi_board_info[0].irq = OMAP_GPIO_IRQ(ts_gpio);
 224         spi_register_board_info(ldp_spi_board_info,
 225                                 ARRAY_SIZE(ldp_spi_board_info));
 226         ads7846_dev_init();
 227         twl4030_bci_battery_init();
 228         omap_serial_init();
 229         usb_musb_init();
 230         hsmmc_init();
 231 }
 232
 233 static void __init omap_ldp_map_io(void)
 234 {
 235         omap2_set_globals_343x();
 236         omap2_map_common_io();
 237 }
 238
 239 MACHINE_START(OMAP_LDP, "OMAP LDP board")
 240         .phys_io        = 0x48000000,
 241         .io_pg_offst    = ((0xd8000000) >> 18) & 0xfffc,
 242         .boot_params    = 0x80000100,
 243         .map_io         = omap_ldp_map_io,
 244         .init_irq       = omap_ldp_init_irq,
 245         .init_machine   = omap_ldp_init,
 246         .timer          = &omap_timer,
 247 MACHINE_END