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 +1,195 @@
  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 <linux/gpio-pxa.h>
  66 +
  67 +#include <pcmcia/ss.h>
  68 +
  69 +#include <mach/hardware.h>
  70 +#include <asm/mach-types.h>
  71 +
  72 +#include <mach/pxa27x.h>
  73 +
  74 +#include <asm/io.h>
  75 +#include <mach/gpio.h>
  76 +#include <mach/gumstix.h>
  77 +#include "soc_common.h"
  78 +
  79 +#define ARRAY_AND_SIZE(x)      (x), ARRAY_SIZE(x)
  80 +
  81 +#define BANK_OFF(n)     (((n) < 3) ? (n) << 2 : 0x100 + (((n) - 3) << 2))
  82 +#define GPLR(x)         __REG2(0x40E00000, BANK_OFF((x) >> 5))
  83 +
  84 +static struct pcmcia_irqs gumstix_pcmcia_irqs0[] = {
  85 +       { 0, GUMSTIX_S0_nCD_IRQ,        "CF0 nCD"     },
  86 +       { 0, GUMSTIX_S0_nSTSCHG_IRQ,    "CF0 nSTSCHG" },
  87 +};
  88 +
  89 +static struct pcmcia_irqs gumstix_pcmcia_irqs1[] = {
  90 +       { 1, GUMSTIX_S1_nCD_IRQ,        "CF1 nCD"     },
  91 +       { 1, GUMSTIX_S1_nSTSCHG_IRQ,    "CF1 nSTSCHG" },
  92 +};
  93 +
  94 +
  95 +static int net_cf_vx_mode = 0;
  96 +
  97 +static int gumstix_pcmcia_hw_init(struct soc_pcmcia_socket *skt)
  98 +{
  99 +/* Note: The verdex_pcmcia_pin_config is moved to gumstix_verdex.c in order to use mfp_pxa2xx_config
 100 +   for board-specific pin configuration instead of the old deprecated pxa_gpio_mode function.  Thus,
 101 +   only the IRQ init is still needed to be done here. */
 102 +       skt->socket.pci_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;
 103 +
 104 +       return (skt->nr == 0) ? soc_pcmcia_request_irqs(skt, gumstix_pcmcia_irqs0, ARRAY_SIZE(gumstix_pcmcia_irqs0)) :
 105 +                               soc_pcmcia_request_irqs(skt, gumstix_pcmcia_irqs1, ARRAY_SIZE(gumstix_pcmcia_irqs1));
 106 +}
 107 +
 108 +static void gumstix_pcmcia_hw_shutdown(struct soc_pcmcia_socket *skt)
 109 +{
 110 +       if(skt->nr == 0)
 111 +       {
 112 +               soc_pcmcia_free_irqs(skt, gumstix_pcmcia_irqs0, ARRAY_SIZE(gumstix_pcmcia_irqs0));
 113 +       } else {
 114 +               soc_pcmcia_free_irqs(skt, gumstix_pcmcia_irqs1, ARRAY_SIZE(gumstix_pcmcia_irqs1));
 115 +       }
 116 +
 117 +       if (net_cf_vx_mode) {
 118 +               gpio_free(GPIO_GUMSTIX_CF_OLD_RESET);
 119 +       } else {
 120 +               gpio_free(GPIO_GUMSTIX_CF_RESET);
 121 +       }
 122 +
 123 +}
 124 +
 125 +static void gumstix_pcmcia_socket_state(struct soc_pcmcia_socket *skt,
 126 +                                   struct pcmcia_state *state)
 127 +{
 128 +       unsigned int cd, prdy_nbsy, nbvd1;
 129 +       if(skt->nr == 0)
 130 +       {
 131 +               cd = GPIO_GUMSTIX_nCD_0;
 132 +               if(net_cf_vx_mode)
 133 +                       prdy_nbsy = GPIO_GUMSTIX_PRDY_nBSY_0_OLD;
 134 +               else
 135 +                       prdy_nbsy = GPIO_GUMSTIX_PRDY_nBSY_0;
 136 +               nbvd1 = GPIO_GUMSTIX_nBVD1_0;
 137 +       } else {
 138 +               cd = GPIO_GUMSTIX_nCD_1;
 139 +               prdy_nbsy = GPIO_GUMSTIX_PRDY_nBSY_1;
 140 +               nbvd1 = GPIO_GUMSTIX_nBVD1_1;
 141 +       }
 142 +       state->detect = !!gpio_get_value(cd);
 143 +       state->ready  = !!gpio_get_value(prdy_nbsy);
 144 +       state->bvd1   = !!gpio_get_value(nbvd1);
 145 +       state->bvd2   = 1;
 146 +       state->vs_3v  = 0;
 147 +       state->vs_Xv  = 0;
 148 +       state->wrprot = 0;
 149 +}
 150 +
 151 +static int gumstix_pcmcia_configure_socket(struct soc_pcmcia_socket *skt,
 152 +                                      const socket_state_t *state)
 153 +{
 154 +       return 0;
 155 +}
 156 +
 157 +static void gumstix_pcmcia_socket_init(struct soc_pcmcia_socket *skt)
 158 +{
 159 +       if(skt->nr) {
 160 +               soc_pcmcia_enable_irqs(skt, gumstix_pcmcia_irqs0, ARRAY_SIZE(gumstix_pcmcia_irqs0));
 161 +       } else {
 162 +               soc_pcmcia_enable_irqs(skt, gumstix_pcmcia_irqs1, ARRAY_SIZE(gumstix_pcmcia_irqs1));
 163 +       }
 164 +}
 165 +
 166 +static void gumstix_pcmcia_socket_suspend(struct soc_pcmcia_socket *skt)
 167 +{
 168 +       if(skt->nr) {
 169 +               soc_pcmcia_disable_irqs(skt, gumstix_pcmcia_irqs0, ARRAY_SIZE(gumstix_pcmcia_irqs0));
 170 +       } else {
 171 +               soc_pcmcia_disable_irqs(skt, gumstix_pcmcia_irqs1, ARRAY_SIZE(gumstix_pcmcia_irqs1));
 172 +       }
 173 +}
 174 +
 175 +static struct pcmcia_low_level gumstix_pcmcia_ops = {
 176 +       .owner                  = THIS_MODULE,
 177 +       .hw_init                = gumstix_pcmcia_hw_init,
 178 +       .hw_shutdown            = gumstix_pcmcia_hw_shutdown,
 179 +       .socket_state           = gumstix_pcmcia_socket_state,
 180 +       .configure_socket       = gumstix_pcmcia_configure_socket,
 181 +       .socket_init            = gumstix_pcmcia_socket_init,
 182 +       .socket_suspend         = gumstix_pcmcia_socket_suspend,
 183 +       .nr                     = 2,
 184 +};
 185 +
 186 +static struct platform_device *gumstix_pcmcia_device;
 187 +
 188 +extern int __init gumstix_get_cf_cards(void);
 189 +
 190 +#ifdef CONFIG_MACH_GUMSTIX_VERDEX
 191 +extern int __init gumstix_check_if_netCF_vx(void);
 192 +#endif
 193 +
 194 +static int __init gumstix_pcmcia_init(void)
 195 +{
 196 +       int ret;
 197 +
 198 +#ifdef CONFIG_MACH_GUMSTIX_VERDEX
 199 +       net_cf_vx_mode = gumstix_check_if_netCF_vx();
 200 +#endif
 201 +
 202 +       gumstix_pcmcia_ops.nr = gumstix_get_cf_cards();
 203 +
 204 +       gumstix_pcmcia_device = platform_device_alloc("pxa2xx-pcmcia", -1);
 205 +       if (!gumstix_pcmcia_device)
 206 +               return -ENOMEM;
 207 +
 208 +       ret = platform_device_add_data(gumstix_pcmcia_device, &gumstix_pcmcia_ops,
 209 +                                      sizeof(gumstix_pcmcia_ops));
 210 +
 211 +       if (ret == 0) {
 212 +               printk(KERN_INFO "Registering gumstix PCMCIA interface.\n");
 213 +               ret = platform_device_add(gumstix_pcmcia_device);
 214 +       }
 215 +
 216 +       if (ret)
 217 +               platform_device_put(gumstix_pcmcia_device);
 218 +
 219 +       return ret;
 220 +}
 221 +
 222 +static void __exit gumstix_pcmcia_exit(void)
 223 +{
 224 +       /*
 225 +        * This call is supposed to free our gumstix_pcmcia_device.
 226 +        * Unfortunately platform_device don't have a free method, and
 227 +        * we can't assume it's free of any reference at this point so we
 228 +        * can't free it either.
 229 +        */
 230 +       platform_device_unregister(gumstix_pcmcia_device);
 231 +}
 232 +
 233 +fs_initcall(gumstix_pcmcia_init);
 234 +module_exit(gumstix_pcmcia_exit);
 235 +
 236 +MODULE_LICENSE("GPL");