target/linux/pxa/patches-3.3/005-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 @@ -212,7 +212,7 @@ config PCMCIA_PXA2XX
  19                     || MACH_ARMCORE || ARCH_PXA_PALM || TRIZEPS_PCMCIA \
  20                     || ARCOM_PCMCIA || ARCH_PXA_ESERIES || MACH_STARGATE2 \
  21                     || MACH_VPAC270 || MACH_BALLOON3 || MACH_COLIBRI \
  22 -                   || MACH_COLIBRI320)
  23 +                   || MACH_COLIBRI320 || ARCH_GUMSTIX)
  24         select PCMCIA_SOC_COMMON
  25         help
  26           Say Y here to include support for the PXA2xx PCMCIA controller
  27 --- a/drivers/pcmcia/Makefile
  28 +++ b/drivers/pcmcia/Makefile
  29 @@ -70,6 +70,9 @@ pxa2xx-obj-$(CONFIG_MACH_BALLOON3)            += p
  30  pxa2xx-obj-$(CONFIG_MACH_COLIBRI)              += pxa2xx_colibri.o
  31  pxa2xx-obj-$(CONFIG_MACH_COLIBRI320)           += pxa2xx_colibri.o
  32
  33 +pxa2xx-obj-$(CONFIG_MACH_GUMSTIX_VERDEX)       += pxa2xx_cs.o
  34 +pxa2xx_cs-objs                                 := pxa2xx_gumstix.o
  35 +
  36  obj-$(CONFIG_PCMCIA_PXA2XX)                    += pxa2xx_base.o $(pxa2xx-obj-y)
  37
  38  obj-$(CONFIG_PCMCIA_XXS1500)                   += xxs1500_ss.o
  39 --- /dev/null
  40 +++ b/drivers/pcmcia/pxa2xx_gumstix.c
  41 @@ -0,0 +1,194 @@
  42 +/*
  43 + * linux/drivers/pcmcia/pxa2xx_gumstix.c
  44 + *
  45 + * Gumstix PCMCIA specific routines. Based on Mainstone
  46 + *
  47 + * Copyright 2004, Craig Hughes <craig@gumstix.com>
  48 + *
  49 + * This program is free software; you can redistribute it and/or modify
  50 + * it under the terms of the GNU General Public License version 2 as
  51 + * published by the Free Software Foundation.
  52 + */
  53 +
  54 +#include <linux/module.h>
  55 +#include <linux/init.h>
  56 +#include <linux/kernel.h>
  57 +#include <linux/errno.h>
  58 +#include <linux/interrupt.h>
  59 +#include <linux/irq.h>
  60 +#include <linux/gpio.h>
  61 +
  62 +#include <linux/delay.h>
  63 +#include <linux/platform_device.h>
  64 +
  65 +#include <pcmcia/ss.h>
  66 +
  67 +#include <mach/hardware.h>
  68 +#include <asm/mach-types.h>
  69 +
  70 +#ifdef CONFIG_MACH_GUMSTIX_VERDEX
  71 +#include <mach/pxa27x.h>
  72 +#else
  73 +#include <mach/pxa27x.h>
  74 +#endif
  75 +
  76 +#include <asm/io.h>
  77 +#include <mach/gpio.h>
  78 +#include <mach/gumstix.h>
  79 +#include "soc_common.h"
  80 +
  81 +#define ARRAY_AND_SIZE(x)      (x), ARRAY_SIZE(x)
  82 +
  83 +static struct pcmcia_irqs gumstix_pcmcia_irqs0[] = {
  84 +       { 0, GUMSTIX_S0_nCD_IRQ,        "CF0 nCD"     },
  85 +       { 0, GUMSTIX_S0_nSTSCHG_IRQ,    "CF0 nSTSCHG" },
  86 +};
  87 +
  88 +static struct pcmcia_irqs gumstix_pcmcia_irqs1[] = {
  89 +       { 1, GUMSTIX_S1_nCD_IRQ,        "CF1 nCD"     },
  90 +       { 1, GUMSTIX_S1_nSTSCHG_IRQ,    "CF1 nSTSCHG" },
  91 +};
  92 +
  93 +
  94 +static int net_cf_vx_mode = 0;
  95 +
  96 +static int gumstix_pcmcia_hw_init(struct soc_pcmcia_socket *skt)
  97 +{
  98 +/* Note: The verdex_pcmcia_pin_config is moved to gumstix_verdex.c in order to use mfp_pxa2xx_config
  99 +   for board-specific pin configuration instead of the old deprecated pxa_gpio_mode function.  Thus,
 100 +   only the IRQ init is still needed to be done here. */
 101 +       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;
 102 +
 103 +       return (skt->nr == 0) ? soc_pcmcia_request_irqs(skt, gumstix_pcmcia_irqs0, ARRAY_SIZE(gumstix_pcmcia_irqs0)) :
 104 +                               soc_pcmcia_request_irqs(skt, gumstix_pcmcia_irqs1, ARRAY_SIZE(gumstix_pcmcia_irqs1));
 105 +}
 106 +
 107 +static void gumstix_pcmcia_hw_shutdown(struct soc_pcmcia_socket *skt)
 108 +{
 109 +       if(skt->nr == 0)
 110 +       {
 111 +               soc_pcmcia_free_irqs(skt, gumstix_pcmcia_irqs0, ARRAY_SIZE(gumstix_pcmcia_irqs0));
 112 +       } else {
 113 +               soc_pcmcia_free_irqs(skt, gumstix_pcmcia_irqs1, ARRAY_SIZE(gumstix_pcmcia_irqs1));
 114 +       }
 115 +
 116 +       if (net_cf_vx_mode) {
 117 +               gpio_free(GPIO_GUMSTIX_CF_OLD_RESET);
 118 +       } else {
 119 +               gpio_free(GPIO_GUMSTIX_CF_RESET);
 120 +       }
 121 +
 122 +}
 123 +
 124 +static void gumstix_pcmcia_socket_state(struct soc_pcmcia_socket *skt,
 125 +                                   struct pcmcia_state *state)
 126 +{
 127 +       unsigned int cd, prdy_nbsy, nbvd1;
 128 +       if(skt->nr == 0)
 129 +       {
 130 +               cd = GPIO_GUMSTIX_nCD_0;
 131 +               if(net_cf_vx_mode)
 132 +                       prdy_nbsy = GPIO_GUMSTIX_PRDY_nBSY_0_OLD;
 133 +               else
 134 +                       prdy_nbsy = GPIO_GUMSTIX_PRDY_nBSY_0;
 135 +               nbvd1 = GPIO_GUMSTIX_nBVD1_0;
 136 +       } else {
 137 +               cd = GPIO_GUMSTIX_nCD_1;
 138 +               prdy_nbsy = GPIO_GUMSTIX_PRDY_nBSY_1;
 139 +               nbvd1 = GPIO_GUMSTIX_nBVD1_1;
 140 +       }
 141 +       state->detect = !(GPLR(cd) & GPIO_bit(cd));
 142 +       state->ready  = !!(GPLR(prdy_nbsy) & GPIO_bit(prdy_nbsy));
 143 +       state->bvd1   = !!(GPLR(nbvd1) & GPIO_bit(nbvd1));
 144 +       state->bvd2   = 1;
 145 +       state->vs_3v  = 0;
 146 +       state->vs_Xv  = 0;
 147 +       state->wrprot = 0;
 148 +}
 149 +
 150 +static int gumstix_pcmcia_configure_socket(struct soc_pcmcia_socket *skt,
 151 +                                      const socket_state_t *state)
 152 +{
 153 +       return 0;
 154 +}
 155 +
 156 +static void gumstix_pcmcia_socket_init(struct soc_pcmcia_socket *skt)
 157 +{
 158 +       if(skt->nr) {
 159 +               soc_pcmcia_enable_irqs(skt, gumstix_pcmcia_irqs0, ARRAY_SIZE(gumstix_pcmcia_irqs0));
 160 +       } else {
 161 +               soc_pcmcia_enable_irqs(skt, gumstix_pcmcia_irqs1, ARRAY_SIZE(gumstix_pcmcia_irqs1));
 162 +       }
 163 +}
 164 +
 165 +static void gumstix_pcmcia_socket_suspend(struct soc_pcmcia_socket *skt)
 166 +{
 167 +       if(skt->nr) {
 168 +               soc_pcmcia_disable_irqs(skt, gumstix_pcmcia_irqs0, ARRAY_SIZE(gumstix_pcmcia_irqs0));
 169 +       } else {
 170 +               soc_pcmcia_disable_irqs(skt, gumstix_pcmcia_irqs1, ARRAY_SIZE(gumstix_pcmcia_irqs1));
 171 +       }
 172 +}
 173 +
 174 +static struct pcmcia_low_level gumstix_pcmcia_ops = {
 175 +       .owner                  = THIS_MODULE,
 176 +       .hw_init                = gumstix_pcmcia_hw_init,
 177 +       .hw_shutdown            = gumstix_pcmcia_hw_shutdown,
 178 +       .socket_state           = gumstix_pcmcia_socket_state,
 179 +       .configure_socket       = gumstix_pcmcia_configure_socket,
 180 +       .socket_init            = gumstix_pcmcia_socket_init,
 181 +       .socket_suspend         = gumstix_pcmcia_socket_suspend,
 182 +       .nr                     = 2,
 183 +};
 184 +
 185 +static struct platform_device *gumstix_pcmcia_device;
 186 +
 187 +extern int __init gumstix_get_cf_cards(void);
 188 +
 189 +#ifdef CONFIG_MACH_GUMSTIX_VERDEX
 190 +extern int __init gumstix_check_if_netCF_vx(void);
 191 +#endif
 192 +
 193 +static int __init gumstix_pcmcia_init(void)
 194 +{
 195 +       int ret;
 196 +
 197 +#ifdef CONFIG_MACH_GUMSTIX_VERDEX
 198 +       net_cf_vx_mode = gumstix_check_if_netCF_vx();
 199 +#endif
 200 +
 201 +       gumstix_pcmcia_ops.nr = gumstix_get_cf_cards();
 202 +
 203 +       gumstix_pcmcia_device = platform_device_alloc("pxa2xx-pcmcia", -1);
 204 +       if (!gumstix_pcmcia_device)
 205 +               return -ENOMEM;
 206 +
 207 +       ret = platform_device_add_data(gumstix_pcmcia_device, &gumstix_pcmcia_ops,
 208 +                                      sizeof(gumstix_pcmcia_ops));
 209 +
 210 +       if (ret == 0) {
 211 +               printk(KERN_INFO "Registering gumstix PCMCIA interface.\n");
 212 +               ret = platform_device_add(gumstix_pcmcia_device);
 213 +       }
 214 +
 215 +       if (ret)
 216 +               platform_device_put(gumstix_pcmcia_device);
 217 +
 218 +       return ret;
 219 +}
 220 +
 221 +static void __exit gumstix_pcmcia_exit(void)
 222 +{
 223 +       /*
 224 +        * This call is supposed to free our gumstix_pcmcia_device.
 225 +        * Unfortunately platform_device don't have a free method, and
 226 +        * we can't assume it's free of any reference at this point so we
 227 +        * can't free it either.
 228 +        */
 229 +       platform_device_unregister(gumstix_pcmcia_device);
 230 +}
 231 +
 232 +fs_initcall(gumstix_pcmcia_init);
 233 +module_exit(gumstix_pcmcia_exit);
 234 +
 235 +MODULE_LICENSE("GPL");