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                 .irq            = OMAP_GPIO_IRQ(102),
  47                 .flags          = UPF_BOOT_AUTOCONF|UPF_IOREMAP|UPF_SHARE_IRQ,
  48                 .irqflags       = IRQF_SHARED | IRQF_TRIGGER_RISING,
  49                 .iotype         = UPIO_MEM,
  50                 .regshift       = 1,
  51                 .uartclk        = QUART_CLK,
  52         }, {
  53                 .flags          = 0
  54         }
  55 };
  56
  57 static struct platform_device zoom_debugboard_serial_device = {
  58         .name                   = "serial8250",
  59         .id                     = PLAT8250_DEV_PLATFORM,
  60         .dev                    = {
  61                 .platform_data  = serial_platform_data,
  62         },
  63 };
  64
  65 static inline void __init zoom_init_quaduart(void)
  66 {
  67         int quart_cs;
  68         unsigned long cs_mem_base;
  69         int quart_gpio = 0;
  70
  71         if (gpio_request_one(ZOOM_QUADUART_RST_GPIO,
  72                                 GPIOF_OUT_INIT_LOW,
  73                                 "TL16CP754C GPIO") < 0) {
  74                 pr_err("Failed to request GPIO%d for TL16CP754C\n",
  75                         ZOOM_QUADUART_RST_GPIO);
  76                 return;
  77         }
  78
  79         quart_cs = ZOOM_QUADUART_CS;
  80
  81         if (gpmc_cs_request(quart_cs, SZ_1M, &cs_mem_base) < 0) {
  82                 printk(KERN_ERR "Failed to request GPMC mem"
  83                                 "for Quad UART(TL16CP754C)\n");
  84                 return;
  85         }
  86
  87         quart_gpio = ZOOM_QUADUART_GPIO;
  88
  89         if (gpio_request_one(quart_gpio, GPIOF_IN, "TL16CP754C GPIO") < 0)
  90                 printk(KERN_ERR "Failed to request GPIO%d for TL16CP754C\n",
  91                                                                 quart_gpio);
  92 }
  93
  94 static inline int omap_zoom_debugboard_detect(void)
  95 {
  96         int debug_board_detect = 0;
  97         int ret = 1;
  98
  99         debug_board_detect = ZOOM_SMSC911X_GPIO;
 100
 101         if (gpio_request_one(debug_board_detect, GPIOF_IN,
 102                              "Zoom debug board detect") < 0) {
 103                 printk(KERN_ERR "Failed to request GPIO%d for Zoom debug"
 104                 "board detect\n", debug_board_detect);
 105                 return 0;
 106         }
 107
 108         if (!gpio_get_value(debug_board_detect)) {
 109                 ret = 0;
 110         }
 111         gpio_free(debug_board_detect);
 112         return ret;
 113 }
 114
 115 static struct platform_device *zoom_devices[] __initdata = {
 116         &zoom_debugboard_serial_device,
 117 };
 118
 119 int __init zoom_debugboard_init(void)
 120 {
 121         if (!omap_zoom_debugboard_detect())
 122                 return 0;
 123
 124         zoom_init_smsc911x();
 125         zoom_init_quaduart();
 126         return platform_add_devices(zoom_devices, ARRAY_SIZE(zoom_devices));
 127 }