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
  16 #include <mach/gpmc.h>
  17
  18 #define ZOOM2_SMSC911X_CS       7
  19 #define ZOOM2_SMSC911X_GPIO     158
  20 #define ZOOM2_QUADUART_CS       3
  21 #define ZOOM2_QUADUART_GPIO     102
  22 #define QUART_CLK               1843200
  23 #define DEBUG_BASE              0x08000000
  24 #define ZOOM2_ETHR_START        DEBUG_BASE
  25
  26 static struct resource zoom2_smsc911x_resources[] = {
  27         [0] = {
  28                 .start  = ZOOM2_ETHR_START,
  29                 .end    = ZOOM2_ETHR_START + SZ_4K,
  30                 .flags  = IORESOURCE_MEM,
  31         },
  32         [1] = {
  33                 .flags  = IORESOURCE_IRQ | IORESOURCE_IRQ_LOWLEVEL,
  34         },
  35 };
  36
  37 static struct smsc911x_platform_config zoom2_smsc911x_config = {
  38         .irq_polarity   = SMSC911X_IRQ_POLARITY_ACTIVE_LOW,
  39         .irq_type       = SMSC911X_IRQ_TYPE_OPEN_DRAIN,
  40         .flags          = SMSC911X_USE_32BIT,
  41         .phy_interface  = PHY_INTERFACE_MODE_MII,
  42 };
  43
  44 static struct platform_device zoom2_smsc911x_device = {
  45         .name           = "smsc911x",
  46         .id             = -1,
  47         .num_resources  = ARRAY_SIZE(zoom2_smsc911x_resources),
  48         .resource       = zoom2_smsc911x_resources,
  49         .dev            = {
  50                 .platform_data = &zoom2_smsc911x_config,
  51         },
  52 };
  53
  54 static inline void __init zoom2_init_smsc911x(void)
  55 {
  56         int eth_cs;
  57         unsigned long cs_mem_base;
  58         int eth_gpio = 0;
  59
  60         eth_cs = ZOOM2_SMSC911X_CS;
  61
  62         if (gpmc_cs_request(eth_cs, SZ_16M, &cs_mem_base) < 0) {
  63                 printk(KERN_ERR "Failed to request GPMC mem for smsc911x\n");
  64                 return;
  65         }
  66
  67         zoom2_smsc911x_resources[0].start = cs_mem_base + 0x0;
  68         zoom2_smsc911x_resources[0].end   = cs_mem_base + 0xff;
  69
  70         eth_gpio = ZOOM2_SMSC911X_GPIO;
  71
  72         zoom2_smsc911x_resources[1].start = OMAP_GPIO_IRQ(eth_gpio);
  73
  74         if (gpio_request(eth_gpio, "smsc911x irq") < 0) {
  75                 printk(KERN_ERR "Failed to request GPIO%d for smsc911x IRQ\n",
  76                                 eth_gpio);
  77                 return;
  78         }
  79         gpio_direction_input(eth_gpio);
  80 }
  81
  82 static struct plat_serial8250_port serial_platform_data[] = {
  83         {
  84                 .mapbase        = 0x10000000,
  85                 .irq            = OMAP_GPIO_IRQ(102),
  86                 .flags          = UPF_BOOT_AUTOCONF|UPF_IOREMAP|UPF_SHARE_IRQ,
  87                 .iotype         = UPIO_MEM,
  88                 .regshift       = 1,
  89                 .uartclk        = QUART_CLK,
  90         }, {
  91                 .flags          = 0
  92         }
  93 };
  94
  95 static struct platform_device zoom2_debugboard_serial_device = {
  96         .name                   = "serial8250",
  97         .id                     = PLAT8250_DEV_PLATFORM1,
  98         .dev                    = {
  99                 .platform_data  = serial_platform_data,
 100         },
 101 };
 102
 103 static inline void __init zoom2_init_quaduart(void)
 104 {
 105         int quart_cs;
 106         unsigned long cs_mem_base;
 107         int quart_gpio = 0;
 108
 109         quart_cs = ZOOM2_QUADUART_CS;
 110
 111         if (gpmc_cs_request(quart_cs, SZ_1M, &cs_mem_base) < 0) {
 112                 printk(KERN_ERR "Failed to request GPMC mem"
 113                                 "for Quad UART(TL16CP754C)\n");
 114                 return;
 115         }
 116
 117         quart_gpio = ZOOM2_QUADUART_GPIO;
 118
 119         if (gpio_request(quart_gpio, "TL16CP754C GPIO") < 0) {
 120                 printk(KERN_ERR "Failed to request GPIO%d for TL16CP754C\n",
 121                                                                 quart_gpio);
 122                 return;
 123         }
 124         gpio_direction_input(quart_gpio);
 125 }
 126
 127 static inline int omap_zoom2_debugboard_detect(void)
 128 {
 129         int debug_board_detect = 0;
 130
 131         debug_board_detect = ZOOM2_SMSC911X_GPIO;
 132
 133         if (gpio_request(debug_board_detect, "Zoom2 debug board detect") < 0) {
 134                 printk(KERN_ERR "Failed to request GPIO%d for Zoom2 debug"
 135                 "board detect\n", debug_board_detect);
 136                 return 0;
 137         }
 138         gpio_direction_input(debug_board_detect);
 139
 140         if (!gpio_get_value(debug_board_detect)) {
 141                 gpio_free(debug_board_detect);
 142                 return 0;
 143         }
 144         return 1;
 145 }
 146
 147 static struct platform_device *zoom2_devices[] __initdata = {
 148         &zoom2_smsc911x_device,
 149         &zoom2_debugboard_serial_device,
 150 };
 151
 152 int __init omap_zoom2_debugboard_init(void)
 153 {
 154         if (!omap_zoom2_debugboard_detect())
 155                 return 0;
 156
 157         zoom2_init_smsc911x();
 158         zoom2_init_quaduart();
 159         return platform_add_devices(zoom2_devices, ARRAY_SIZE(zoom2_devices));
 160 }