target/linux/pxa/patches/005-verdex_pcmcia_support.patch

   1 From 76a102bd5c9d792db19c6c72eafdecea0311a0c9 Mon Sep 17 00:00:00 2001
   2 From: Craig Hughes <craig@gumstix.com>
   3 Date: Fri, 30 Oct 2009 14:16:27 -0400
   4 Subject: [PATCH] [ARM] pxa: Gumstix Verdex PCMCIA support
   5
   6 Needed for the Libertas CS wireless device.
   7
   8 Signed-off-by: Bobby Powers <bobbypowers@gmail.com>
   9 ---
  10  drivers/pcmcia/Kconfig          |    3 +-
  11  drivers/pcmcia/Makefile         |    3 +
  12  drivers/pcmcia/pxa2xx_gumstix.c |  194 +++++++++++++++++++++++++++++++++++++++
  13  3 files changed, 199 insertions(+), 1 deletions(-)
  14  create mode 100644 drivers/pcmcia/pxa2xx_gumstix.c
  15
  16 --- a/drivers/pcmcia/Kconfig
  17 +++ b/drivers/pcmcia/Kconfig
  18 @@ -221,7 +221,8 @@ config PCMCIA_PXA2XX
  19         depends on ARM && ARCH_PXA && PCMCIA
  20         depends on (ARCH_LUBBOCK || MACH_MAINSTONE || PXA_SHARPSL \
  21                     || MACH_ARMCORE || ARCH_PXA_PALM || TRIZEPS_PCMCIA \
  22 -                   || ARCH_VIPER || ARCH_PXA_ESERIES || MACH_STARGATE2)
  23 +                   || ARCH_VIPER || ARCH_PXA_ESERIES || MACH_STARGATE2 \
  24 +                   || ARCH_GUMSTIX)
  25         help
  26           Say Y here to include support for the PXA2xx PCMCIA controller
  27
  28 --- a/drivers/pcmcia/Makefile
  29 +++ b/drivers/pcmcia/Makefile
  30 @@ -77,4 +77,7 @@ pxa2xx-obj-$(CONFIG_MACH_PALMLD)              += pxa
  31  pxa2xx-obj-$(CONFIG_MACH_E740)                 += pxa2xx_e740.o
  32  pxa2xx-obj-$(CONFIG_MACH_STARGATE2)            += pxa2xx_stargate2.o
  33
  34 +pxa2xx-obj-$(CONFIG_MACH_GUMSTIX_VERDEX)       += pxa2xx_cs.o
  35 +pxa2xx_cs-objs                                 := pxa2xx_gumstix.o
  36 +
  37  obj-$(CONFIG_PCMCIA_PXA2XX)                    += pxa2xx_core.o $(pxa2xx-obj-y)
  38 --- /dev/null
  39 +++ b/drivers/pcmcia/pxa2xx_gumstix.c
  40 @@ -0,0 +1,194 @@
  41 +/*
  42 + * linux/drivers/pcmcia/pxa2xx_gumstix.c
  43 + *
  44 + * Gumstix PCMCIA specific routines. Based on Mainstone
  45 + *
  46 + * Copyright 2004, Craig Hughes <craig@gumstix.com>
  47 + *
  48 + * This program is free software; you can redistribute it and/or modify
  49 + * it under the terms of the GNU General Public License version 2 as
  50 + * published by the Free Software Foundation.
  51 + */
  52 +
  53 +#include <linux/module.h>
  54 +#include <linux/init.h>
  55 +#include <linux/kernel.h>
  56 +#include <linux/errno.h>
  57 +#include <linux/interrupt.h>
  58 +#include <linux/irq.h>
  59 +#include <linux/gpio.h>
  60 +
  61 +#include <linux/delay.h>
  62 +#include <linux/platform_device.h>
  63 +
  64 +#include <pcmcia/ss.h>
  65 +
  66 +#include <mach/hardware.h>
  67 +#include <asm/mach-types.h>
  68 +
  69 +#ifdef CONFIG_MACH_GUMSTIX_VERDEX
  70 +#include <mach/pxa27x.h>
  71 +#else
  72 +#include <mach/pxa27x.h>
  73 +#endif
  74 +
  75 +#include <asm/io.h>
  76 +#include <mach/gpio.h>
  77 +#include <mach/gumstix.h>
  78 +#include "soc_common.h"
  79 +
  80 +#define ARRAY_AND_SIZE(x)      (x), ARRAY_SIZE(x)
  81 +
  82 +static struct pcmcia_irqs gumstix_pcmcia_irqs0[] = {
  83 +       { 0, GUMSTIX_S0_nCD_IRQ,        "CF0 nCD"     },
  84 +       { 0, GUMSTIX_S0_nSTSCHG_IRQ,    "CF0 nSTSCHG" },
  85 +};
  86 +
  87 +static struct pcmcia_irqs gumstix_pcmcia_irqs1[] = {
  88 +       { 1, GUMSTIX_S1_nCD_IRQ,        "CF1 nCD"     },
  89 +       { 1, GUMSTIX_S1_nSTSCHG_IRQ,    "CF1 nSTSCHG" },
  90 +};
  91 +
  92 +
  93 +static int net_cf_vx_mode = 0;
  94 +
  95 +static int gumstix_pcmcia_hw_init(struct soc_pcmcia_socket *skt)
  96 +{
  97 +/* Note: The verdex_pcmcia_pin_config is moved to gumstix_verdex.c in order to use mfp_pxa2xx_config
  98 +   for board-specific pin configuration instead of the old deprecated pxa_gpio_mode function.  Thus,
  99 +   only the IRQ init is still needed to be done here. */
 100 +       skt->irq = (skt->nr == 0) ? ((net_cf_vx_mode == 0) ? GUMSTIX_S0_PRDY_nBSY_IRQ : GUMSTIX_S0_PRDY_nBSY_OLD_IRQ) : GUMSTIX_S1_PRDY_nBSY_IRQ;
 101 +
 102 +       return (skt->nr == 0) ? soc_pcmcia_request_irqs(skt, gumstix_pcmcia_irqs0, ARRAY_SIZE(gumstix_pcmcia_irqs0)) :
 103 +                               soc_pcmcia_request_irqs(skt, gumstix_pcmcia_irqs1, ARRAY_SIZE(gumstix_pcmcia_irqs1));
 104 +}
 105 +
 106 +static void gumstix_pcmcia_hw_shutdown(struct soc_pcmcia_socket *skt)
 107 +{
 108 +       if(skt->nr == 0)
 109 +       {
 110 +               soc_pcmcia_free_irqs(skt, gumstix_pcmcia_irqs0, ARRAY_SIZE(gumstix_pcmcia_irqs0));
 111 +       } else {
 112 +               soc_pcmcia_free_irqs(skt, gumstix_pcmcia_irqs1, ARRAY_SIZE(gumstix_pcmcia_irqs1));
 113 +       }
 114 +
 115 +       if (net_cf_vx_mode) {
 116 +               gpio_free(GPIO_GUMSTIX_CF_OLD_RESET);
 117 +       } else {
 118 +               gpio_free(GPIO_GUMSTIX_CF_RESET);
 119 +       }
 120 +
 121 +}
 122 +
 123 +static void gumstix_pcmcia_socket_state(struct soc_pcmcia_socket *skt,
 124 +                                   struct pcmcia_state *state)
 125 +{
 126 +       unsigned int cd, prdy_nbsy, nbvd1;
 127 +       if(skt->nr == 0)
 128 +       {
 129 +               cd = GPIO_GUMSTIX_nCD_0;
 130 +               if(net_cf_vx_mode)
 131 +                       prdy_nbsy = GPIO_GUMSTIX_PRDY_nBSY_0_OLD;
 132 +               else
 133 +                       prdy_nbsy = GPIO_GUMSTIX_PRDY_nBSY_0;
 134 +               nbvd1 = GPIO_GUMSTIX_nBVD1_0;
 135 +       } else {
 136 +               cd = GPIO_GUMSTIX_nCD_1;
 137 +               prdy_nbsy = GPIO_GUMSTIX_PRDY_nBSY_1;
 138 +               nbvd1 = GPIO_GUMSTIX_nBVD1_1;
 139 +       }
 140 +       state->detect = !(GPLR(cd) & GPIO_bit(cd));
 141 +       state->ready  = !!(GPLR(prdy_nbsy) & GPIO_bit(prdy_nbsy));
 142 +       state->bvd1   = !!(GPLR(nbvd1) & GPIO_bit(nbvd1));
 143 +       state->bvd2   = 1;
 144 +       state->vs_3v  = 0;
 145 +       state->vs_Xv  = 0;
 146 +       state->wrprot = 0;
 147 +}
 148 +
 149 +static int gumstix_pcmcia_configure_socket(struct soc_pcmcia_socket *skt,
 150 +                                      const socket_state_t *state)
 151 +{
 152 +       return 0;
 153 +}
 154 +
 155 +static void gumstix_pcmcia_socket_init(struct soc_pcmcia_socket *skt)
 156 +{
 157 +       if(skt->nr) {
 158 +               soc_pcmcia_enable_irqs(skt, gumstix_pcmcia_irqs0, ARRAY_SIZE(gumstix_pcmcia_irqs0));
 159 +       } else {
 160 +               soc_pcmcia_enable_irqs(skt, gumstix_pcmcia_irqs1, ARRAY_SIZE(gumstix_pcmcia_irqs1));
 161 +       }
 162 +}
 163 +
 164 +static void gumstix_pcmcia_socket_suspend(struct soc_pcmcia_socket *skt)
 165 +{
 166 +       if(skt->nr) {
 167 +               soc_pcmcia_disable_irqs(skt, gumstix_pcmcia_irqs0, ARRAY_SIZE(gumstix_pcmcia_irqs0));
 168 +       } else {
 169 +               soc_pcmcia_disable_irqs(skt, gumstix_pcmcia_irqs1, ARRAY_SIZE(gumstix_pcmcia_irqs1));
 170 +       }
 171 +}
 172 +
 173 +static struct pcmcia_low_level gumstix_pcmcia_ops = {
 174 +       .owner                  = THIS_MODULE,
 175 +       .hw_init                = gumstix_pcmcia_hw_init,
 176 +       .hw_shutdown            = gumstix_pcmcia_hw_shutdown,
 177 +       .socket_state           = gumstix_pcmcia_socket_state,
 178 +       .configure_socket       = gumstix_pcmcia_configure_socket,
 179 +       .socket_init            = gumstix_pcmcia_socket_init,
 180 +       .socket_suspend         = gumstix_pcmcia_socket_suspend,
 181 +       .nr                     = 2,
 182 +};
 183 +
 184 +static struct platform_device *gumstix_pcmcia_device;
 185 +
 186 +extern int __init gumstix_get_cf_cards(void);
 187 +
 188 +#ifdef CONFIG_MACH_GUMSTIX_VERDEX
 189 +extern int __init gumstix_check_if_netCF_vx(void);
 190 +#endif
 191 +
 192 +static int __init gumstix_pcmcia_init(void)
 193 +{
 194 +       int ret;
 195 +
 196 +#ifdef CONFIG_MACH_GUMSTIX_VERDEX
 197 +       net_cf_vx_mode = gumstix_check_if_netCF_vx();
 198 +#endif
 199 +
 200 +       gumstix_pcmcia_ops.nr = gumstix_get_cf_cards();
 201 +
 202 +       gumstix_pcmcia_device = platform_device_alloc("pxa2xx-pcmcia", -1);
 203 +       if (!gumstix_pcmcia_device)
 204 +               return -ENOMEM;
 205 +
 206 +       ret = platform_device_add_data(gumstix_pcmcia_device, &gumstix_pcmcia_ops,
 207 +                                      sizeof(gumstix_pcmcia_ops));
 208 +
 209 +       if (ret == 0) {
 210 +               printk(KERN_INFO "Registering gumstix PCMCIA interface.\n");
 211 +               ret = platform_device_add(gumstix_pcmcia_device);
 212 +       }
 213 +
 214 +       if (ret)
 215 +               platform_device_put(gumstix_pcmcia_device);
 216 +
 217 +       return ret;
 218 +}
 219 +
 220 +static void __exit gumstix_pcmcia_exit(void)
 221 +{
 222 +       /*
 223 +        * This call is supposed to free our gumstix_pcmcia_device.
 224 +        * Unfortunately platform_device don't have a free method, and
 225 +        * we can't assume it's free of any reference at this point so we
 226 +        * can't free it either.
 227 +        */
 228 +       platform_device_unregister(gumstix_pcmcia_device);
 229 +}
 230 +
 231 +fs_initcall(gumstix_pcmcia_init);
 232 +module_exit(gumstix_pcmcia_exit);
 233 +
 234 +MODULE_LICENSE("GPL");