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 #include <mach/board-zoom.h>
  20
  21 #define ZOOM_SMSC911X_CS        7
  22 #define ZOOM_SMSC911X_GPIO      158
  23 #define ZOOM_QUADUART_CS        3
  24 #define ZOOM_QUADUART_GPIO      102
  25 #define QUART_CLK               1843200
  26 #define DEBUG_BASE              0x08000000
  27 #define ZOOM_ETHR_START DEBUG_BASE
  28
  29 static struct resource zoom_smsc911x_resources[] = {
  30         [0] = {
  31                 .start  = ZOOM_ETHR_START,
  32                 .end    = ZOOM_ETHR_START + SZ_4K,
  33                 .flags  = IORESOURCE_MEM,
  34         },
  35         [1] = {
  36                 .flags  = IORESOURCE_IRQ | IORESOURCE_IRQ_LOWLEVEL,
  37         },
  38 };
  39
  40 static struct smsc911x_platform_config zoom_smsc911x_config = {
  41         .irq_polarity   = SMSC911X_IRQ_POLARITY_ACTIVE_LOW,
  42         .irq_type       = SMSC911X_IRQ_TYPE_OPEN_DRAIN,
  43         .flags          = SMSC911X_USE_32BIT,
  44         .phy_interface  = PHY_INTERFACE_MODE_MII,
  45 };
  46
  47 static struct platform_device zoom_smsc911x_device = {
  48         .name           = "smsc911x",
  49         .id             = -1,
  50         .num_resources  = ARRAY_SIZE(zoom_smsc911x_resources),
  51         .resource       = zoom_smsc911x_resources,
  52         .dev            = {
  53                 .platform_data = &zoom_smsc911x_config,
  54         },
  55 };
  56
  57 static inline void __init zoom_init_smsc911x(void)
  58 {
  59         int eth_cs;
  60         unsigned long cs_mem_base;
  61         int eth_gpio = 0;
  62
  63         eth_cs = ZOOM_SMSC911X_CS;
  64
  65         if (gpmc_cs_request(eth_cs, SZ_16M, &cs_mem_base) < 0) {
  66                 printk(KERN_ERR "Failed to request GPMC mem for smsc911x\n");
  67                 return;
  68         }
  69
  70         zoom_smsc911x_resources[0].start = cs_mem_base + 0x0;
  71         zoom_smsc911x_resources[0].end   = cs_mem_base + 0xff;
  72
  73         eth_gpio = ZOOM_SMSC911X_GPIO;
  74
  75         zoom_smsc911x_resources[1].start = OMAP_GPIO_IRQ(eth_gpio);
  76
  77         if (gpio_request(eth_gpio, "smsc911x irq") < 0) {
  78                 printk(KERN_ERR "Failed to request GPIO%d for smsc911x IRQ\n",
  79                                 eth_gpio);
  80                 return;
  81         }
  82         gpio_direction_input(eth_gpio);
  83 }
  84
  85 static struct plat_serial8250_port serial_platform_data[] = {
  86         {
  87                 .mapbase        = ZOOM_UART_BASE,
  88                 .irq            = OMAP_GPIO_IRQ(102),
  89                 .flags          = UPF_BOOT_AUTOCONF|UPF_IOREMAP|UPF_SHARE_IRQ,
  90                 .irqflags       = IRQF_SHARED | IRQF_TRIGGER_RISING,
  91                 .iotype         = UPIO_MEM,
  92                 .regshift       = 1,
  93                 .uartclk        = QUART_CLK,
  94         }, {
  95                 .flags          = 0
  96         }
  97 };
  98
  99 static struct platform_device zoom_debugboard_serial_device = {
 100         .name                   = "serial8250",
 101         .id                     = PLAT8250_DEV_PLATFORM,
 102         .dev                    = {
 103                 .platform_data  = serial_platform_data,
 104         },
 105 };
 106
 107 static inline void __init zoom_init_quaduart(void)
 108 {
 109         int quart_cs;
 110         unsigned long cs_mem_base;
 111         int quart_gpio = 0;
 112
 113         quart_cs = ZOOM_QUADUART_CS;
 114
 115         if (gpmc_cs_request(quart_cs, SZ_1M, &cs_mem_base) < 0) {
 116                 printk(KERN_ERR "Failed to request GPMC mem"
 117                                 "for Quad UART(TL16CP754C)\n");
 118                 return;
 119         }
 120
 121         quart_gpio = ZOOM_QUADUART_GPIO;
 122
 123         if (gpio_request(quart_gpio, "TL16CP754C GPIO") < 0) {
 124                 printk(KERN_ERR "Failed to request GPIO%d for TL16CP754C\n",
 125                                                                 quart_gpio);
 126                 return;
 127         }
 128         gpio_direction_input(quart_gpio);
 129 }
 130
 131 static inline int omap_zoom_debugboard_detect(void)
 132 {
 133         int debug_board_detect = 0;
 134         int ret = 1;
 135
 136         debug_board_detect = ZOOM_SMSC911X_GPIO;
 137
 138         if (gpio_request(debug_board_detect, "Zoom debug board detect") < 0) {
 139                 printk(KERN_ERR "Failed to request GPIO%d for Zoom debug"
 140                 "board detect\n", debug_board_detect);
 141                 return 0;
 142         }
 143         gpio_direction_input(debug_board_detect);
 144
 145         if (!gpio_get_value(debug_board_detect)) {
 146                 ret = 0;
 147         }
 148         gpio_free(debug_board_detect);
 149         return ret;
 150 }
 151
 152 static struct platform_device *zoom_devices[] __initdata = {
 153         &zoom_smsc911x_device,
 154         &zoom_debugboard_serial_device,
 155 };
 156
 157 int __init zoom_debugboard_init(void)
 158 {
 159         if (!omap_zoom_debugboard_detect())
 160                 return 0;
 161
 162         zoom_init_smsc911x();
 163         zoom_init_quaduart();
 164         return platform_add_devices(zoom_devices, ARRAY_SIZE(zoom_devices));
 165 }