release/src-rt-6.x.4708/linux/linux-2.6.36/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
  19 #define ZOOM_SMSC911X_CS        7
  20 #define ZOOM_SMSC911X_GPIO      158
  21 #define ZOOM_QUADUART_CS        3
  22 #define ZOOM_QUADUART_GPIO      102
  23 #define QUART_CLK               1843200
  24 #define DEBUG_BASE              0x08000000
  25 #define ZOOM_ETHR_START DEBUG_BASE
  26
  27 static struct resource zoom_smsc911x_resources[] = {
  28         [0] = {
  29                 .start  = ZOOM_ETHR_START,
  30                 .end    = ZOOM_ETHR_START + SZ_4K,
  31                 .flags  = IORESOURCE_MEM,
  32         },
  33         [1] = {
  34                 .flags  = IORESOURCE_IRQ | IORESOURCE_IRQ_LOWLEVEL,
  35         },
  36 };
  37
  38 static struct smsc911x_platform_config zoom_smsc911x_config = {
  39         .irq_polarity   = SMSC911X_IRQ_POLARITY_ACTIVE_LOW,
  40         .irq_type       = SMSC911X_IRQ_TYPE_OPEN_DRAIN,
  41         .flags          = SMSC911X_USE_32BIT,
  42         .phy_interface  = PHY_INTERFACE_MODE_MII,
  43 };
  44
  45 static struct platform_device zoom_smsc911x_device = {
  46         .name           = "smsc911x",
  47         .id             = -1,
  48         .num_resources  = ARRAY_SIZE(zoom_smsc911x_resources),
  49         .resource       = zoom_smsc911x_resources,
  50         .dev            = {
  51                 .platform_data = &zoom_smsc911x_config,
  52         },
  53 };
  54
  55 static inline void __init zoom_init_smsc911x(void)
  56 {
  57         int eth_cs;
  58         unsigned long cs_mem_base;
  59         int eth_gpio = 0;
  60
  61         eth_cs = ZOOM_SMSC911X_CS;
  62
  63         if (gpmc_cs_request(eth_cs, SZ_16M, &cs_mem_base) < 0) {
  64                 printk(KERN_ERR "Failed to request GPMC mem for smsc911x\n");
  65                 return;
  66         }
  67
  68         zoom_smsc911x_resources[0].start = cs_mem_base + 0x0;
  69         zoom_smsc911x_resources[0].end   = cs_mem_base + 0xff;
  70
  71         eth_gpio = ZOOM_SMSC911X_GPIO;
  72
  73         zoom_smsc911x_resources[1].start = OMAP_GPIO_IRQ(eth_gpio);
  74
  75         if (gpio_request(eth_gpio, "smsc911x irq") < 0) {
  76                 printk(KERN_ERR "Failed to request GPIO%d for smsc911x IRQ\n",
  77                                 eth_gpio);
  78                 return;
  79         }
  80         gpio_direction_input(eth_gpio);
  81 }
  82
  83 static struct plat_serial8250_port serial_platform_data[] = {
  84         {
  85                 .mapbase        = ZOOM_UART_BASE,
  86                 .irq            = OMAP_GPIO_IRQ(102),
  87                 .flags          = UPF_BOOT_AUTOCONF|UPF_IOREMAP|UPF_SHARE_IRQ,
  88                 .irqflags       = IRQF_SHARED | IRQF_TRIGGER_RISING,
  89                 .iotype         = UPIO_MEM,
  90                 .regshift       = 1,
  91                 .uartclk        = QUART_CLK,
  92         }, {
  93                 .flags          = 0
  94         }
  95 };
  96
  97 static struct platform_device zoom_debugboard_serial_device = {
  98         .name                   = "serial8250",
  99         .id                     = PLAT8250_DEV_PLATFORM,
 100         .dev                    = {
 101                 .platform_data  = serial_platform_data,
 102         },
 103 };
 104
 105 static inline void __init zoom_init_quaduart(void)
 106 {
 107         int quart_cs;
 108         unsigned long cs_mem_base;
 109         int quart_gpio = 0;
 110
 111         quart_cs = ZOOM_QUADUART_CS;
 112
 113         if (gpmc_cs_request(quart_cs, SZ_1M, &cs_mem_base) < 0) {
 114                 printk(KERN_ERR "Failed to request GPMC mem"
 115                                 "for Quad UART(TL16CP754C)\n");
 116                 return;
 117         }
 118
 119         quart_gpio = ZOOM_QUADUART_GPIO;
 120
 121         if (gpio_request(quart_gpio, "TL16CP754C GPIO") < 0) {
 122                 printk(KERN_ERR "Failed to request GPIO%d for TL16CP754C\n",
 123                                                                 quart_gpio);
 124                 return;
 125         }
 126         gpio_direction_input(quart_gpio);
 127 }
 128
 129 static inline int omap_zoom_debugboard_detect(void)
 130 {
 131         int debug_board_detect = 0;
 132         int ret = 1;
 133
 134         debug_board_detect = ZOOM_SMSC911X_GPIO;
 135
 136         if (gpio_request(debug_board_detect, "Zoom debug board detect") < 0) {
 137                 printk(KERN_ERR "Failed to request GPIO%d for Zoom debug"
 138                 "board detect\n", debug_board_detect);
 139                 return 0;
 140         }
 141         gpio_direction_input(debug_board_detect);
 142
 143         if (!gpio_get_value(debug_board_detect)) {
 144                 ret = 0;
 145         }
 146         gpio_free(debug_board_detect);
 147         return ret;
 148 }
 149
 150 static struct platform_device *zoom_devices[] __initdata = {
 151         &zoom_smsc911x_device,
 152         &zoom_debugboard_serial_device,
 153 };
 154
 155 int __init zoom_debugboard_init(void)
 156 {
 157         if (!omap_zoom_debugboard_detect())
 158                 return 0;
 159
 160         zoom_init_smsc911x();
 161         zoom_init_quaduart();
 162         return platform_add_devices(zoom_devices, ARRAY_SIZE(zoom_devices));
 163 }