target/linux/pxa/patches-2.6.21/018-modular-init-smc91x.patch

   1 --- a/drivers/net/Kconfig
   2 +++ b/drivers/net/Kconfig
   3 @@ -959,6 +959,12 @@ config SMC91X
   4           module, say M here and read <file:Documentation/modules.txt> as well
   5           as <file:Documentation/networking/net-modules.txt>.
   6
   7 +config SMC91X_GUMSTIX
   8 +       tristate
   9 +       default m if SMC91X=m
  10 +       default y if SMC91X=y
  11 +       depends on SMC91X && ARCH_GUMSTIX
  12 +
  13  config SMC9194
  14         tristate "SMC 9194 support"
  15         depends on NET_VENDOR_SMC && (ISA || MAC && BROKEN)
  16 --- a/drivers/net/Makefile
  17 +++ b/drivers/net/Makefile
  18 @@ -201,6 +201,7 @@ obj-$(CONFIG_PASEMI_MAC) += pasemi_mac.o
  19
  20  obj-$(CONFIG_MACB) += macb.o
  21
  22 +obj-$(CONFIG_SMC91X_GUMSTIX) += gumstix-smc91x.o
  23  obj-$(CONFIG_ARM) += arm/
  24  obj-$(CONFIG_DEV_APPLETALK) += appletalk/
  25  obj-$(CONFIG_TR) += tokenring/
  26 --- a/drivers/net/smc91x.c
  27 +++ b/drivers/net/smc91x.c
  28 @@ -2373,6 +2373,10 @@ static struct platform_driver smc_driver
  29         },
  30  };
  31
  32 +#ifdef CONFIG_ARCH_GUMSTIX
  33 +extern void gumstix_smc91x_load(void);
  34 +#endif
  35 +
  36  static int __init smc_init(void)
  37  {
  38  #ifdef MODULE
  39 @@ -2384,6 +2388,10 @@ static int __init smc_init(void)
  40  #endif
  41  #endif
  42
  43 +#ifdef CONFIG_ARCH_GUMSTIX
  44 +       gumstix_smc91x_load();
  45 +#endif
  46 +
  47         return platform_driver_register(&smc_driver);
  48  }
  49
  50 --- /dev/null
  51 +++ b/drivers/net/gumstix-smc91x.c
  52 @@ -0,0 +1,143 @@
  53 +/*
  54 + *  Gumstix SMC91C111 chip intialization driver
  55 + *
  56 + *  Author:     Craig Hughes
  57 + *  Created:    December 9, 2004
  58 + *  Copyright:  (C) 2004 Craig Hughes
  59 + *
  60 + * This program is free software; you can redistribute it and/or modify
  61 + * it under the terms of the GNU General Public License as published by
  62 + * the Free Software Foundation; either version 2 of the License, or
  63 + * (at your option) any later version.
  64 + *
  65 + */
  66 +
  67 +#include <linux/module.h>
  68 +#include <linux/ioport.h>
  69 +#include <linux/device.h>
  70 +#include <linux/platform_device.h>
  71 +#include <linux/delay.h>
  72 +
  73 +#include <asm/hardware.h>
  74 +#include <asm/arch/pxa-regs.h>
  75 +#include <asm/delay.h>
  76 +
  77 +#include <asm/arch/gumstix.h>
  78 +
  79 +#define SMC_DEBUG               0
  80 +#include <asm/io.h>
  81 +#include "smc91x.h"
  82 +
  83 +static struct resource gumstix_smc91x0_resources[] = {
  84 +       [0] = {
  85 +               .name   = "smc91x-regs",
  86 +               .start  = PXA_CS1_PHYS + 0x00000300,
  87 +               .end    = PXA_CS1_PHYS + 0x000fffff,
  88 +               .flags  = IORESOURCE_MEM,
  89 +       },
  90 +       [1] = {
  91 +               .start  = GUMSTIX_ETH0_IRQ,
  92 +               .end    = GUMSTIX_ETH0_IRQ,
  93 +               .flags  = IORESOURCE_IRQ,
  94 +       },
  95 +};
  96 +
  97 +static struct resource gumstix_smc91x1_resources[] = {
  98 +       [0] = {
  99 +               .name   = "smc91x-regs",
 100 +               .start  = PXA_CS2_PHYS + 0x00000300,
 101 +               .end    = PXA_CS2_PHYS + 0x000fffff,
 102 +               .flags  = IORESOURCE_MEM,
 103 +       },
 104 +       [1] = {
 105 +               .start  = GUMSTIX_ETH1_IRQ,
 106 +               .end    = GUMSTIX_ETH1_IRQ,
 107 +               .flags  = IORESOURCE_IRQ,
 108 +       },
 109 +};
 110 +
 111 +static struct platform_device gumstix_smc91x0_device = {
 112 +       .name           = "smc91x",
 113 +       .id             = 0,
 114 +       .num_resources  = ARRAY_SIZE(gumstix_smc91x0_resources),
 115 +       .resource       = gumstix_smc91x0_resources,
 116 +};
 117 +
 118 +static struct platform_device gumstix_smc91x1_device = {
 119 +       .name           = "smc91x",
 120 +       .id             = 1,
 121 +       .num_resources  = ARRAY_SIZE(gumstix_smc91x1_resources),
 122 +       .resource       = gumstix_smc91x1_resources,
 123 +};
 124 +
 125 +static struct platform_device *smc91x_devices[] = {
 126 +       &gumstix_smc91x0_device,
 127 +       &gumstix_smc91x1_device,
 128 +};
 129 +
 130 +/* First we're going to test if there's a 2nd SMC91C111, and if not, then we'll free up those resources and the GPIO lines
 131 + * that it would otherwise use.  We have no choice but to probe by doing:
 132 + * Set nCS2 to CS2 mode
 133 + * Set the reset line to GPIO out mode, and pull it high, then drop it low (to trigger reset)
 134 + * Read from the memory space to check for the sentinel sequence identifying a likely SMC91C111 device
 135 + */
 136 +int __init gumstix_smc91x_init(void)
 137 +{
 138 +       unsigned int val, num_devices=ARRAY_SIZE(smc91x_devices);
 139 +       void *ioaddr;
 140 +
 141 +       /* Set up nPWE */
 142 +       pxa_gpio_mode(GPIO49_nPWE_MD);
 143 +
 144 +       pxa_gpio_mode(GPIO78_nCS_2_MD);
 145 +       // If either if statement fails, then we'll drop out and turn_off_eth1,
 146 +       // if both succeed, then we'll skip that and just proceed with 2 cards
 147 +       if(request_mem_region(gumstix_smc91x1_resources[0].start, SMC_IO_EXTENT, "smc91x probe"))
 148 +       {
 149 +               ioaddr = ioremap(gumstix_smc91x1_resources[0].start, SMC_IO_EXTENT);
 150 +               val = ioread16(ioaddr + BANK_SELECT);
 151 +               iounmap(ioaddr);
 152 +               release_mem_region(gumstix_smc91x1_resources[0].start, SMC_IO_EXTENT);
 153 +               if ((val & 0xFF00) == 0x3300) {
 154 +                       goto proceed;
 155 +               }
 156 +       }
 157 +
 158 +turn_off_eth1:
 159 +       // This is apparently not an SMC91C111
 160 +       // So, let's decrement the number of devices to request, and reset the GPIO lines to GPIO IN mode
 161 +       num_devices--;
 162 +       smc91x_devices[1] = NULL;
 163 +       pxa_gpio_mode(78 | GPIO_IN);
 164 +
 165 +proceed:
 166 +       pxa_gpio_mode(GPIO15_nCS_1_MD);
 167 +
 168 +       if(smc91x_devices[1]) pxa_gpio_mode(GPIO_GUMSTIX_ETH1_RST_MD);
 169 +       pxa_gpio_mode(GPIO_GUMSTIX_ETH0_RST_MD);
 170 +       if(smc91x_devices[1]) GPSR(GPIO_GUMSTIX_ETH1_RST) = GPIO_bit(GPIO_GUMSTIX_ETH1_RST);
 171 +       GPSR(GPIO_GUMSTIX_ETH0_RST) = GPIO_bit(GPIO_GUMSTIX_ETH0_RST);
 172 +       udelay(1); // Hold RESET for at least 100ns
 173 +       if(smc91x_devices[1]) GPCR(GPIO_GUMSTIX_ETH1_RST) = GPIO_bit(GPIO_GUMSTIX_ETH1_RST);
 174 +       GPCR(GPIO_GUMSTIX_ETH0_RST) = GPIO_bit(GPIO_GUMSTIX_ETH0_RST);
 175 +       msleep(50);
 176 +
 177 +       return platform_add_devices(smc91x_devices, num_devices);
 178 +}
 179 +
 180 +void __exit gumstix_smc91x_exit(void)
 181 +{
 182 +       if(smc91x_devices[1] != NULL) platform_device_unregister(&gumstix_smc91x1_device);
 183 +       platform_device_unregister(&gumstix_smc91x0_device);
 184 +}
 185 +
 186 +void gumstix_smc91x_load(void) {}
 187 +EXPORT_SYMBOL(gumstix_smc91x_load);
 188 +
 189 +module_init(gumstix_smc91x_init);
 190 +module_exit(gumstix_smc91x_exit);
 191 +
 192 +MODULE_LICENSE("GPL");
 193 +MODULE_AUTHOR("Craig Hughes <craig@gumstix.com>");
 194 +MODULE_DESCRIPTION("Gumstix board SMC91C111 chip initialization driver");
 195 +MODULE_VERSION("1:0.1");