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 "gpmc.h"
  21 #include "gpmc-smsc911x.h"
  22
  23 #include "board-zoom.h"
  24
  25 #include "soc.h"
  26 #include "common.h"
  27
  28 #define ZOOM_SMSC911X_CS        7
  29 #define ZOOM_SMSC911X_GPIO      158
  30 #define ZOOM_QUADUART_CS        3
  31 #define ZOOM_QUADUART_GPIO      102
  32 #define ZOOM_QUADUART_RST_GPIO  152
  33 #define QUART_CLK               1843200
  34 #define DEBUG_BASE              0x08000000
  35 #define ZOOM_ETHR_START DEBUG_BASE
  36
  37 static struct omap_smsc911x_platform_data zoom_smsc911x_cfg = {
  38         .cs             = ZOOM_SMSC911X_CS,
  39         .gpio_irq       = ZOOM_SMSC911X_GPIO,
  40         .gpio_reset     = -EINVAL,
  41         .flags          = SMSC911X_USE_32BIT,
  42 };
  43
  44 static inline void __init zoom_init_smsc911x(void)
  45 {
  46         gpmc_smsc911x_init(&zoom_smsc911x_cfg);
  47 }
  48
  49 static struct plat_serial8250_port serial_platform_data[] = {
  50         {
  51                 .mapbase        = ZOOM_UART_BASE,
  52                 .flags          = UPF_BOOT_AUTOCONF|UPF_IOREMAP|UPF_SHARE_IRQ,
  53                 .irqflags       = IRQF_SHARED | IRQF_TRIGGER_RISING,
  54                 .iotype         = UPIO_MEM,
  55                 .regshift       = 1,
  56                 .uartclk        = QUART_CLK,
  57         }, {
  58                 .flags          = 0
  59         }
  60 };
  61
  62 static struct platform_device zoom_debugboard_serial_device = {
  63         .name                   = "serial8250",
  64         .id                     = PLAT8250_DEV_PLATFORM,
  65         .dev                    = {
  66                 .platform_data  = serial_platform_data,
  67         },
  68 };
  69
  70 static inline void __init zoom_init_quaduart(void)
  71 {
  72         int quart_cs;
  73         unsigned long cs_mem_base;
  74         int quart_gpio = 0;
  75
  76         if (gpio_request_one(ZOOM_QUADUART_RST_GPIO,
  77                                 GPIOF_OUT_INIT_LOW,
  78                                 "TL16CP754C GPIO") < 0) {
  79                 pr_err("Failed to request GPIO%d for TL16CP754C\n",
  80                         ZOOM_QUADUART_RST_GPIO);
  81                 return;
  82         }
  83
  84         quart_cs = ZOOM_QUADUART_CS;
  85
  86         if (gpmc_cs_request(quart_cs, SZ_1M, &cs_mem_base) < 0) {
  87                 pr_err("Failed to request GPMC mem for Quad UART(TL16CP754C)\n");
  88                 return;
  89         }
  90
  91         quart_gpio = ZOOM_QUADUART_GPIO;
  92
  93         if (gpio_request_one(quart_gpio, GPIOF_IN, "TL16CP754C GPIO") < 0)
  94                 printk(KERN_ERR "Failed to request GPIO%d for TL16CP754C\n",
  95                                                                 quart_gpio);
  96
  97         serial_platform_data[0].irq = gpio_to_irq(102);
  98 }
  99
 100 static inline int omap_zoom_debugboard_detect(void)
 101 {
 102         int debug_board_detect = 0;
 103         int ret = 1;
 104
 105         debug_board_detect = ZOOM_SMSC911X_GPIO;
 106
 107         if (gpio_request_one(debug_board_detect, GPIOF_IN,
 108                              "Zoom debug board detect") < 0) {
 109                 pr_err("Failed to request GPIO%d for Zoom debug board detect\n",
 110                        debug_board_detect);
 111                 return 0;
 112         }
 113
 114         if (!gpio_get_value(debug_board_detect)) {
 115                 ret = 0;
 116         }
 117         gpio_free(debug_board_detect);
 118         return ret;
 119 }
 120
 121 static struct platform_device *zoom_devices[] __initdata = {
 122         &zoom_debugboard_serial_device,
 123 };
 124
 125 static struct regulator_consumer_supply dummy_supplies[] = {
 126         REGULATOR_SUPPLY("vddvario", "smsc911x.0"),
 127         REGULATOR_SUPPLY("vdd33a", "smsc911x.0"),
 128 };
 129
 130 int __init zoom_debugboard_init(void)
 131 {
 132         if (!omap_zoom_debugboard_detect())
 133                 return 0;
 134
 135         regulator_register_fixed(0, dummy_supplies, ARRAY_SIZE(dummy_supplies));
 136         zoom_init_smsc911x();
 137         zoom_init_quaduart();
 138         return platform_add_devices(zoom_devices, ARRAY_SIZE(zoom_devices));
 139 }