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