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 <plat/gpmc.h>
  18 #include <plat/gpmc-smsc911x.h>
  19
  20 #include <mach/board-zoom.h>
  21
  22 #define ZOOM_SMSC911X_CS        7
  23 #define ZOOM_SMSC911X_GPIO      158
  24 #define ZOOM_QUADUART_CS        3
  25 #define ZOOM_QUADUART_GPIO      102
  26 #define ZOOM_QUADUART_RST_GPIO  152
  27 #define QUART_CLK               1843200
  28 #define DEBUG_BASE              0x08000000
  29 #define ZOOM_ETHR_START DEBUG_BASE
  30
  31 static struct omap_smsc911x_platform_data zoom_smsc911x_cfg = {
  32         .cs             = ZOOM_SMSC911X_CS,
  33         .gpio_irq       = ZOOM_SMSC911X_GPIO,
  34         .gpio_reset     = -EINVAL,
  35         .flags          = SMSC911X_USE_32BIT,
  36 };
  37
  38 static inline void __init zoom_init_smsc911x(void)
  39 {
  40         gpmc_smsc911x_init(&zoom_smsc911x_cfg);
  41 }
  42
  43 static struct plat_serial8250_port serial_platform_data[] = {
  44         {
  45                 .mapbase        = ZOOM_UART_BASE,
  46                 .flags          = UPF_BOOT_AUTOCONF|UPF_IOREMAP|UPF_SHARE_IRQ,
  47                 .irqflags       = IRQF_SHARED | IRQF_TRIGGER_RISING,
  48                 .iotype         = UPIO_MEM,
  49                 .regshift       = 1,
  50                 .uartclk        = QUART_CLK,
  51         }, {
  52                 .flags          = 0
  53         }
  54 };
  55
  56 static struct platform_device zoom_debugboard_serial_device = {
  57         .name                   = "serial8250",
  58         .id                     = PLAT8250_DEV_PLATFORM,
  59         .dev                    = {
  60                 .platform_data  = serial_platform_data,
  61         },
  62 };
  63
  64 static inline void __init zoom_init_quaduart(void)
  65 {
  66         int quart_cs;
  67         unsigned long cs_mem_base;
  68         int quart_gpio = 0;
  69
  70         if (gpio_request_one(ZOOM_QUADUART_RST_GPIO,
  71                                 GPIOF_OUT_INIT_LOW,
  72                                 "TL16CP754C GPIO") < 0) {
  73                 pr_err("Failed to request GPIO%d for TL16CP754C\n",
  74                         ZOOM_QUADUART_RST_GPIO);
  75                 return;
  76         }
  77
  78         quart_cs = ZOOM_QUADUART_CS;
  79
  80         if (gpmc_cs_request(quart_cs, SZ_1M, &cs_mem_base) < 0) {
  81                 printk(KERN_ERR "Failed to request GPMC mem"
  82                                 "for Quad UART(TL16CP754C)\n");
  83                 return;
  84         }
  85
  86         quart_gpio = ZOOM_QUADUART_GPIO;
  87
  88         if (gpio_request_one(quart_gpio, GPIOF_IN, "TL16CP754C GPIO") < 0)
  89                 printk(KERN_ERR "Failed to request GPIO%d for TL16CP754C\n",
  90                                                                 quart_gpio);
  91
  92         serial_platform_data[0].irq = gpio_to_irq(102);
  93 }
  94
  95 static inline int omap_zoom_debugboard_detect(void)
  96 {
  97         int debug_board_detect = 0;
  98         int ret = 1;
  99
 100         debug_board_detect = ZOOM_SMSC911X_GPIO;
 101
 102         if (gpio_request_one(debug_board_detect, GPIOF_IN,
 103                              "Zoom debug board detect") < 0) {
 104                 printk(KERN_ERR "Failed to request GPIO%d for Zoom debug"
 105                 "board detect\n", debug_board_detect);
 106                 return 0;
 107         }
 108
 109         if (!gpio_get_value(debug_board_detect)) {
 110                 ret = 0;
 111         }
 112         gpio_free(debug_board_detect);
 113         return ret;
 114 }
 115
 116 static struct platform_device *zoom_devices[] __initdata = {
 117         &zoom_debugboard_serial_device,
 118 };
 119
 120 int __init zoom_debugboard_init(void)
 121 {
 122         if (!omap_zoom_debugboard_detect())
 123                 return 0;
 124
 125         zoom_init_smsc911x();
 126         zoom_init_quaduart();
 127         return platform_add_devices(zoom_devices, ARRAY_SIZE(zoom_devices));
 128 }