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         default:
  59                 break;
  60         }
  61         /* release the reset of this card */
  62         pr_debug("%s: sock %d irq %d\n", __func__, skt->nr, skt->socket.pci_irq);
  63
  64         /* supplementory irqs for the socket */
  65         for (i = 0; i < ARRAY_SIZE(irqs); i++) {
  66                 if (irqs[i].sock != skt->nr)
  67                         continue;
  68                 if (gpio_request(irq_to_gpio(irqs[i].irq), irqs[i].str) < 0) {
  69                         pr_err("%s: sock %d unable to request gpio %d\n",
  70                                 __func__, skt->nr, irq_to_gpio(irqs[i].irq));
  71                         ret = -EBUSY;
  72                         goto error;
  73                 }
  74                 if (gpio_direction_input(irq_to_gpio(irqs[i].irq)) < 0) {
  75                         pr_err("%s: sock %d unable to set input gpio %d\n",
  76                                 __func__, skt->nr, irq_to_gpio(irqs[i].irq));
  77                         ret = -EINVAL;
  78                         goto error;
  79                 }
  80         }
  81         return soc_pcmcia_request_irqs(skt, irqs, ARRAY_SIZE(irqs));
  82
  83 error:
  84         for (; i >= 0; i--) {
  85                 gpio_free(irq_to_gpio(irqs[i].irq));
  86         }
  87         return (ret);
  88 }
  89
  90 static void trizeps_pcmcia_hw_shutdown(struct soc_pcmcia_socket *skt)
  91 {
  92         int i;
  93         /* free allocated gpio's */
  94         gpio_free(GPIO_PRDY);
  95         for (i = 0; i < ARRAY_SIZE(irqs); i++)
  96                 gpio_free(irq_to_gpio(irqs[i].irq));
  97 }
  98
  99 static unsigned long trizeps_pcmcia_status[2];
 100
 101 static void trizeps_pcmcia_socket_state(struct soc_pcmcia_socket *skt,
 102                                 struct pcmcia_state *state)
 103 {
 104         unsigned short status = 0, change;
 105         status = CFSR_readw();
 106         change = (status ^ trizeps_pcmcia_status[skt->nr]) &
 107                                 ConXS_CFSR_BVD_MASK;
 108         if (change) {
 109                 trizeps_pcmcia_status[skt->nr] = status;
 110                 if (status & ConXS_CFSR_BVD1) {
 111                         /* enable_irq empty */
 112                 } else {
 113                         /* disable_irq empty */
 114                 }
 115         }
 116
 117         switch (skt->nr) {
 118         case 0:
 119                 /* just fill in fix states */
 120                 state->detect = gpio_get_value(GPIO_PCD) ? 0 : 1;
 121                 state->ready  = gpio_get_value(GPIO_PRDY) ? 1 : 0;
 122                 state->bvd1   = (status & ConXS_CFSR_BVD1) ? 1 : 0;
 123                 state->bvd2   = (status & ConXS_CFSR_BVD2) ? 1 : 0;
 124                 state->vs_3v  = (status & ConXS_CFSR_VS1) ? 0 : 1;
 125                 state->vs_Xv  = (status & ConXS_CFSR_VS2) ? 0 : 1;
 126                 state->wrprot = 0;      /* not available */
 127                 break;
 128
 129 #ifndef CONFIG_MACH_TRIZEPS_CONXS
 130         /* on ConXS we only have one slot. Second is inactive */
 131         case 1:
 132                 state->detect = 0;
 133                 state->ready  = 0;
 134                 state->bvd1   = 0;
 135                 state->bvd2   = 0;
 136                 state->vs_3v  = 0;
 137                 state->vs_Xv  = 0;
 138                 state->wrprot = 0;
 139                 break;
 140
 141 #endif
 142         }
 143 }
 144
 145 static int trizeps_pcmcia_configure_socket(struct soc_pcmcia_socket *skt,
 146                                 const socket_state_t *state)
 147 {
 148         int ret = 0;
 149         unsigned short power = 0;
 150
 151         /* we do nothing here just check a bit */
 152         switch (state->Vcc) {
 153         case 0:  power &= 0xfc; break;
 154         case 33: power |= ConXS_BCR_S0_VCC_3V3; break;
 155         case 50:
 156                 pr_err("%s(): Vcc 5V not supported in socket\n", __func__);
 157                 break;
 158         default:
 159                 pr_err("%s(): bad Vcc %u\n", __func__, state->Vcc);
 160                 ret = -1;
 161         }
 162
 163         switch (state->Vpp) {
 164         case 0:  power &= 0xf3; break;
 165         case 33: power |= ConXS_BCR_S0_VPP_3V3; break;
 166         case 120:
 167                 pr_err("%s(): Vpp 12V not supported in socket\n", __func__);
 168                 break;
 169         default:
 170                 if (state->Vpp != state->Vcc) {
 171                         pr_err("%s(): bad Vpp %u\n", __func__, state->Vpp);
 172                         ret = -1;
 173                 }
 174         }
 175
 176         switch (skt->nr) {
 177         case 0:                  /* we only have 3.3V */
 178                 board_pcmcia_power(power);
 179                 break;
 180
 181 #ifndef CONFIG_MACH_TRIZEPS_CONXS
 182         /* on ConXS we only have one slot. Second is inactive */
 183         case 1:
 184 #endif
 185         default:
 186                 break;
 187         }
 188
 189         return ret;
 190 }
 191
 192 static void trizeps_pcmcia_socket_init(struct soc_pcmcia_socket *skt)
 193 {
 194         /* default is on */
 195         board_pcmcia_power(0x9);
 196 }
 197
 198 static void trizeps_pcmcia_socket_suspend(struct soc_pcmcia_socket *skt)
 199 {
 200         board_pcmcia_power(0x0);
 201 }
 202
 203 static struct pcmcia_low_level trizeps_pcmcia_ops = {
 204         .owner                  = THIS_MODULE,
 205         .hw_init                = trizeps_pcmcia_hw_init,
 206         .hw_shutdown            = trizeps_pcmcia_hw_shutdown,
 207         .socket_state           = trizeps_pcmcia_socket_state,
 208         .configure_socket       = trizeps_pcmcia_configure_socket,
 209         .socket_init            = trizeps_pcmcia_socket_init,
 210         .socket_suspend         = trizeps_pcmcia_socket_suspend,
 211 #ifdef CONFIG_MACH_TRIZEPS_CONXS
 212         .nr                     = 1,
 213 #else
 214         .nr                     = 2,
 215 #endif
 216         .first                  = 0,
 217 };
 218
 219 static struct platform_device *trizeps_pcmcia_device;
 220
 221 static int __init trizeps_pcmcia_init(void)
 222 {
 223         int ret;
 224
 225         if (!machine_is_trizeps4() && !machine_is_trizeps4wl())
 226                 return -ENODEV;
 227
 228         trizeps_pcmcia_device = platform_device_alloc("pxa2xx-pcmcia", -1);
 229         if (!trizeps_pcmcia_device)
 230                 return -ENOMEM;
 231
 232         ret = platform_device_add_data(trizeps_pcmcia_device,
 233                         &trizeps_pcmcia_ops, sizeof(trizeps_pcmcia_ops));
 234
 235         if (ret == 0)
 236                 ret = platform_device_add(trizeps_pcmcia_device);
 237
 238         if (ret)
 239                 platform_device_put(trizeps_pcmcia_device);
 240
 241         return ret;
 242 }
 243
 244 static void __exit trizeps_pcmcia_exit(void)
 245 {
 246         platform_device_unregister(trizeps_pcmcia_device);
 247 }
 248
 249 fs_initcall(trizeps_pcmcia_init);
 250 module_exit(trizeps_pcmcia_exit);
 251
 252 MODULE_LICENSE("GPL");
 253 MODULE_AUTHOR("Juergen Schindele");
 254 MODULE_ALIAS("platform:pxa2xx-pcmcia");