drivers/pcmcia/pxa2xx_trizeps4.c

   1 /*
   2  * linux/drivers/pcmcia/pxa2xx_trizeps4.c
   3  *
   4  * TRIZEPS PCMCIA specific routines.
   5  *
   6  * Author:      Jürgen Schindele
   7  * Created:     20 02, 2006
   8  * Copyright:   Jürgen Schindele
   9  *
  10  * This program is free software; you can redistribute it and/or modify
  11  * it under the terms of the GNU General Public License version 2 as
  12  * published by the Free Software Foundation.
  13  */
  14
  15 #include <linux/module.h>
  16 #include <linux/init.h>
  17 #include <linux/kernel.h>
  18 #include <linux/gpio.h>
  19 #include <linux/interrupt.h>
  20 #include <linux/platform_device.h>
  21
  22 #include <asm/mach-types.h>
  23 #include <asm/irq.h>
  24
  25 #include <mach/hardware.h>
  26 #include <mach/pxa-regs.h>
  27 #include <mach/trizeps4.h>
  28
  29 #include "soc_common.h"
  30
  31 extern void board_pcmcia_power(int power);
  32
  33 static struct pcmcia_irqs irqs[] = {
  34         { 0, IRQ_GPIO(GPIO_PCD), "cs0_cd" }
  35         /* on other baseboards we can have more inputs */
  36 };
  37
  38 static int trizeps_pcmcia_hw_init(struct soc_pcmcia_socket *skt)
  39 {
  40         int ret, i;
  41         /* we dont have voltage/card/ready detection
  42          * so we dont need interrupts for it
  43          */
  44         switch (skt->nr) {
  45         case 0:
  46                 if (gpio_request(GPIO_PRDY, "cf_irq") < 0) {
  47                         pr_err("%s: sock %d unable to request gpio %d\n", __func__,
  48                                 skt->nr, GPIO_PRDY);
  49                         return -EBUSY;
  50                 }
  51                 if (gpio_direction_input(GPIO_PRDY) < 0) {
  52                         pr_err("%s: sock %d unable to set input gpio %d\n", __func__,
  53                                 skt->nr, GPIO_PRDY);
  54                         gpio_free(GPIO_PRDY);
  55                         return -EINVAL;
  56                 }
  57                 skt->irq = IRQ_GPIO(GPIO_PRDY);
  58                 break;
  59
  60 #ifndef CONFIG_MACH_TRIZEPS_CONXS
  61         case 1:
  62 #endif
  63         default:
  64                 break;
  65         }
  66         /* release the reset of this card */
  67         pr_debug("%s: sock %d irq %d\n", __func__, skt->nr, skt->irq);
  68
  69         /* supplementory irqs for the socket */
  70         for (i = 0; i < ARRAY_SIZE(irqs); i++) {
  71                 if (irqs[i].sock != skt->nr)
  72                         continue;
  73                 if (gpio_request(IRQ_TO_GPIO(irqs[i].irq), irqs[i].str) < 0) {
  74                         pr_err("%s: sock %d unable to request gpio %d\n",
  75                                 __func__, skt->nr, IRQ_TO_GPIO(irqs[i].irq));
  76                         ret = -EBUSY;
  77                         goto error;
  78                 }
  79                 if (gpio_direction_input(IRQ_TO_GPIO(irqs[i].irq)) < 0) {
  80                         pr_err("%s: sock %d unable to set input gpio %d\n",
  81                                 __func__, skt->nr, IRQ_TO_GPIO(irqs[i].irq));
  82                         ret = -EINVAL;
  83                         goto error;
  84                 }
  85         }
  86         return soc_pcmcia_request_irqs(skt, irqs, ARRAY_SIZE(irqs));
  87
  88 error:
  89         for (; i >= 0; i--) {
  90                 gpio_free(IRQ_TO_GPIO(irqs[i].irq));
  91         }
  92         return (ret);
  93 }
  94
  95 static void trizeps_pcmcia_hw_shutdown(struct soc_pcmcia_socket *skt)
  96 {
  97         int i;
  98         /* free allocated gpio's */
  99         gpio_free(GPIO_PRDY);
 100         for (i = 0; i < ARRAY_SIZE(irqs); i++)
 101                 gpio_free(IRQ_TO_GPIO(irqs[i].irq));
 102 }
 103
 104 static unsigned long trizeps_pcmcia_status[2];
 105
 106 static void trizeps_pcmcia_socket_state(struct soc_pcmcia_socket *skt,
 107                                 struct pcmcia_state *state)
 108 {
 109         unsigned short status = 0, change;
 110         status = CFSR_readw();
 111         change = (status ^ trizeps_pcmcia_status[skt->nr]) &
 112                                 ConXS_CFSR_BVD_MASK;
 113         if (change) {
 114                 trizeps_pcmcia_status[skt->nr] = status;
 115                 if (status & ConXS_CFSR_BVD1) {
 116                         /* enable_irq empty */
 117                 } else {
 118                         /* disable_irq empty */
 119                 }
 120         }
 121
 122         switch (skt->nr) {
 123         case 0:
 124                 /* just fill in fix states */
 125                 state->detect = gpio_get_value(GPIO_PCD) ? 0 : 1;
 126                 state->ready  = gpio_get_value(GPIO_PRDY) ? 1 : 0;
 127                 state->bvd1   = (status & ConXS_CFSR_BVD1) ? 1 : 0;
 128                 state->bvd2   = (status & ConXS_CFSR_BVD2) ? 1 : 0;
 129                 state->vs_3v  = (status & ConXS_CFSR_VS1) ? 0 : 1;
 130                 state->vs_Xv  = (status & ConXS_CFSR_VS2) ? 0 : 1;
 131                 state->wrprot = 0;      /* not available */
 132                 break;
 133
 134 #ifndef CONFIG_MACH_TRIZEPS_CONXS
 135         /* on ConXS we only have one slot. Second is inactive */
 136         case 1:
 137                 state->detect = 0;
 138                 state->ready  = 0;
 139                 state->bvd1   = 0;
 140                 state->bvd2   = 0;
 141                 state->vs_3v  = 0;
 142                 state->vs_Xv  = 0;
 143                 state->wrprot = 0;
 144                 break;
 145
 146 #endif
 147         }
 148 }
 149
 150 static int trizeps_pcmcia_configure_socket(struct soc_pcmcia_socket *skt,
 151                                 const socket_state_t *state)
 152 {
 153         int ret = 0;
 154         unsigned short power = 0;
 155
 156         /* we do nothing here just check a bit */
 157         switch (state->Vcc) {
 158         case 0:  power &= 0xfc; break;
 159         case 33: power |= ConXS_BCR_S0_VCC_3V3; break;
 160         case 50:
 161                 pr_err("%s(): Vcc 5V not supported in socket\n", __func__);
 162                 break;
 163         default:
 164                 pr_err("%s(): bad Vcc %u\n", __func__, state->Vcc);
 165                 ret = -1;
 166         }
 167
 168         switch (state->Vpp) {
 169         case 0:  power &= 0xf3; break;
 170         case 33: power |= ConXS_BCR_S0_VPP_3V3; break;
 171         case 120:
 172                 pr_err("%s(): Vpp 12V not supported in socket\n", __func__);
 173                 break;
 174         default:
 175                 if (state->Vpp != state->Vcc) {
 176                         pr_err("%s(): bad Vpp %u\n", __func__, state->Vpp);
 177                         ret = -1;
 178                 }
 179         }
 180
 181         switch (skt->nr) {
 182         case 0:                  /* we only have 3.3V */
 183                 board_pcmcia_power(power);
 184                 break;
 185
 186 #ifndef CONFIG_MACH_TRIZEPS_CONXS
 187         /* on ConXS we only have one slot. Second is inactive */
 188         case 1:
 189 #endif
 190         default:
 191                 break;
 192         }
 193
 194         return ret;
 195 }
 196
 197 static void trizeps_pcmcia_socket_init(struct soc_pcmcia_socket *skt)
 198 {
 199         /* default is on */
 200         board_pcmcia_power(0x9);
 201 }
 202
 203 static void trizeps_pcmcia_socket_suspend(struct soc_pcmcia_socket *skt)
 204 {
 205         board_pcmcia_power(0x0);
 206 }
 207
 208 static struct pcmcia_low_level trizeps_pcmcia_ops = {
 209         .owner                  = THIS_MODULE,
 210         .hw_init                = trizeps_pcmcia_hw_init,
 211         .hw_shutdown            = trizeps_pcmcia_hw_shutdown,
 212         .socket_state           = trizeps_pcmcia_socket_state,
 213         .configure_socket       = trizeps_pcmcia_configure_socket,
 214         .socket_init            = trizeps_pcmcia_socket_init,
 215         .socket_suspend         = trizeps_pcmcia_socket_suspend,
 216 #ifdef CONFIG_MACH_TRIZEPS_CONXS
 217         .nr                     = 1,
 218 #else
 219         .nr                     = 2,
 220 #endif
 221         .first                  = 0,
 222 };
 223
 224 static struct platform_device *trizeps_pcmcia_device;
 225
 226 static int __init trizeps_pcmcia_init(void)
 227 {
 228         int ret;
 229
 230         trizeps_pcmcia_device = platform_device_alloc("pxa2xx-pcmcia", -1);
 231         if (!trizeps_pcmcia_device)
 232                 return -ENOMEM;
 233
 234         ret = platform_device_add_data(trizeps_pcmcia_device,
 235                         &trizeps_pcmcia_ops, sizeof(trizeps_pcmcia_ops));
 236
 237         if (ret == 0)
 238                 ret = platform_device_add(trizeps_pcmcia_device);
 239
 240         if (ret)
 241                 platform_device_put(trizeps_pcmcia_device);
 242
 243         return ret;
 244 }
 245
 246 static void __exit trizeps_pcmcia_exit(void)
 247 {
 248         platform_device_unregister(trizeps_pcmcia_device);
 249 }
 250
 251 fs_initcall(trizeps_pcmcia_init);
 252 module_exit(trizeps_pcmcia_exit);
 253
 254 MODULE_LICENSE("GPL");
 255 MODULE_AUTHOR("Juergen Schindele");
 256 MODULE_ALIAS("platform:pxa2xx-pcmcia");