arch/arm/mach-omap2/board-zoom-debugboard.c

   1 /*
   2  * Copyright (C) 2009 Texas Instruments Inc.
   3  * Mikkel Christensen <mlc@ti.com>
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License version 2 as
   7  * published by the Free Software Foundation.
   8  */
   9
  10 #include <linux/kernel.h>
  11 #include <linux/init.h>
  12 #include <linux/gpio.h>
  13 #include <linux/serial_8250.h>
  14 #include <linux/smsc911x.h>
  15 #include <linux/interrupt.h>
  16
  17 #include <linux/regulator/fixed.h>
  18 #include <linux/regulator/machine.h>
  19
  20 #include <plat/gpmc.h>
  21 #include <plat/gpmc-smsc911x.h>
  22 #include <plat/serial.h>
  23
  24 #include <mach/board-zoom.h>
  25
  26 #define ZOOM_SMSC911X_CS        7
  27 #define ZOOM_SMSC911X_GPIO      158
  28 #define ZOOM_QUADUART_CS        3
  29 #define ZOOM_QUADUART_GPIO      102
  30 #define ZOOM_QUADUART_RST_GPIO  152
  31 #define QUART_CLK               1843200
  32 #define DEBUG_BASE              0x08000000
  33 #define ZOOM_ETHR_START DEBUG_BASE
  34
  35 static struct omap_smsc911x_platform_data zoom_smsc911x_cfg = {
  36         .cs             = ZOOM_SMSC911X_CS,
  37         .gpio_irq       = ZOOM_SMSC911X_GPIO,
  38         .gpio_reset     = -EINVAL,
  39         .flags          = SMSC911X_USE_32BIT,
  40 };
  41
  42 static inline void __init zoom_init_smsc911x(void)
  43 {
  44         gpmc_smsc911x_init(&zoom_smsc911x_cfg);
  45 }
  46
  47 static struct plat_serial8250_port serial_platform_data[] = {
  48         {
  49                 .mapbase        = ZOOM_UART_BASE,
  50                 .flags          = UPF_BOOT_AUTOCONF|UPF_IOREMAP|UPF_SHARE_IRQ,
  51                 .irqflags       = IRQF_SHARED | IRQF_TRIGGER_RISING,
  52                 .iotype         = UPIO_MEM,
  53                 .regshift       = 1,
  54                 .uartclk        = QUART_CLK,
  55         }, {
  56                 .flags          = 0
  57         }
  58 };
  59
  60 static struct platform_device zoom_debugboard_serial_device = {
  61         .name                   = "serial8250",
  62         .id                     = PLAT8250_DEV_PLATFORM,
  63         .dev                    = {
  64                 .platform_data  = serial_platform_data,
  65         },
  66 };
  67
  68 static inline void __init zoom_init_quaduart(void)
  69 {
  70         int quart_cs;
  71         unsigned long cs_mem_base;
  72         int quart_gpio = 0;
  73
  74         if (gpio_request_one(ZOOM_QUADUART_RST_GPIO,
  75                                 GPIOF_OUT_INIT_LOW,
  76                                 "TL16CP754C GPIO") < 0) {
  77                 pr_err("Failed to request GPIO%d for TL16CP754C\n",
  78                         ZOOM_QUADUART_RST_GPIO);
  79                 return;
  80         }
  81
  82         quart_cs = ZOOM_QUADUART_CS;
  83
  84         if (gpmc_cs_request(quart_cs, SZ_1M, &cs_mem_base) < 0) {
  85                 printk(KERN_ERR "Failed to request GPMC mem"
  86                                 "for Quad UART(TL16CP754C)\n");
  87                 return;
  88         }
  89
  90         quart_gpio = ZOOM_QUADUART_GPIO;
  91
  92         if (gpio_request_one(quart_gpio, GPIOF_IN, "TL16CP754C GPIO") < 0)
  93                 printk(KERN_ERR "Failed to request GPIO%d for TL16CP754C\n",
  94                                                                 quart_gpio);
  95
  96         serial_platform_data[0].irq = gpio_to_irq(102);
  97 }
  98
  99 static inline int omap_zoom_debugboard_detect(void)
 100 {
 101         int debug_board_detect = 0;
 102         int ret = 1;
 103
 104         debug_board_detect = ZOOM_SMSC911X_GPIO;
 105
 106         if (gpio_request_one(debug_board_detect, GPIOF_IN,
 107                              "Zoom debug board detect") < 0) {
 108                 printk(KERN_ERR "Failed to request GPIO%d for Zoom debug"
 109                 "board detect\n", debug_board_detect);
 110                 return 0;
 111         }
 112
 113         if (!gpio_get_value(debug_board_detect)) {
 114                 ret = 0;
 115         }
 116         gpio_free(debug_board_detect);
 117         return ret;
 118 }
 119
 120 static struct platform_device *zoom_devices[] __initdata = {
 121         &zoom_debugboard_serial_device,
 122 };
 123
 124 static struct regulator_consumer_supply dummy_supplies[] = {
 125         REGULATOR_SUPPLY("vddvario", "smsc911x.0"),
 126         REGULATOR_SUPPLY("vdd33a", "smsc911x.0"),
 127 };
 128
 129 int __init zoom_debugboard_init(void)
 130 {
 131         if (!omap_zoom_debugboard_detect())
 132                 return 0;
 133
 134         regulator_register_fixed(0, dummy_supplies, ARRAY_SIZE(dummy_supplies));
 135         zoom_init_smsc911x();
 136         zoom_init_quaduart();
 137         return platform_add_devices(zoom_devices, ARRAY_SIZE(zoom_devices));
 138 }