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