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 int trizeps_pcmcia_hw_init(struct soc_pcmcia_socket *skt)
  33 {
  34         /* we dont have voltage/card/ready detection
  35          * so we dont need interrupts for it
  36          */
  37         switch (skt->nr) {
  38         case 0:
  39                 skt->stat[SOC_STAT_CD].gpio = GPIO_PCD;
  40                 skt->stat[SOC_STAT_CD].name = "cs0_cd";
  41                 skt->stat[SOC_STAT_RDY].gpio = GPIO_PRDY;
  42                 skt->stat[SOC_STAT_RDY].name = "cs0_rdy";
  43                 break;
  44         default:
  45                 break;
  46         }
  47         /* release the reset of this card */
  48         pr_debug("%s: sock %d irq %d\n", __func__, skt->nr, skt->socket.pci_irq);
  49
  50         return 0;
  51 }
  52
  53 static unsigned long trizeps_pcmcia_status[2];
  54
  55 static void trizeps_pcmcia_socket_state(struct soc_pcmcia_socket *skt,
  56                                 struct pcmcia_state *state)
  57 {
  58         unsigned short status = 0, change;
  59         status = CFSR_readw();
  60         change = (status ^ trizeps_pcmcia_status[skt->nr]) &
  61                                 ConXS_CFSR_BVD_MASK;
  62         if (change) {
  63                 trizeps_pcmcia_status[skt->nr] = status;
  64                 if (status & ConXS_CFSR_BVD1) {
  65                         /* enable_irq empty */
  66                 } else {
  67                         /* disable_irq empty */
  68                 }
  69         }
  70
  71         switch (skt->nr) {
  72         case 0:
  73                 /* just fill in fix states */
  74                 state->bvd1   = (status & ConXS_CFSR_BVD1) ? 1 : 0;
  75                 state->bvd2   = (status & ConXS_CFSR_BVD2) ? 1 : 0;
  76                 state->vs_3v  = (status & ConXS_CFSR_VS1) ? 0 : 1;
  77                 state->vs_Xv  = (status & ConXS_CFSR_VS2) ? 0 : 1;
  78                 break;
  79
  80 #ifndef CONFIG_MACH_TRIZEPS_CONXS
  81         /* on ConXS we only have one slot. Second is inactive */
  82         case 1:
  83                 state->detect = 0;
  84                 state->ready  = 0;
  85                 state->bvd1   = 0;
  86                 state->bvd2   = 0;
  87                 state->vs_3v  = 0;
  88                 state->vs_Xv  = 0;
  89                 break;
  90
  91 #endif
  92         }
  93 }
  94
  95 static int trizeps_pcmcia_configure_socket(struct soc_pcmcia_socket *skt,
  96                                 const socket_state_t *state)
  97 {
  98         int ret = 0;
  99         unsigned short power = 0;
 100
 101         /* we do nothing here just check a bit */
 102         switch (state->Vcc) {
 103         case 0:  power &= 0xfc; break;
 104         case 33: power |= ConXS_BCR_S0_VCC_3V3; break;
 105         case 50:
 106                 pr_err("%s(): Vcc 5V not supported in socket\n", __func__);
 107                 break;
 108         default:
 109                 pr_err("%s(): bad Vcc %u\n", __func__, state->Vcc);
 110                 ret = -1;
 111         }
 112
 113         switch (state->Vpp) {
 114         case 0:  power &= 0xf3; break;
 115         case 33: power |= ConXS_BCR_S0_VPP_3V3; break;
 116         case 120:
 117                 pr_err("%s(): Vpp 12V not supported in socket\n", __func__);
 118                 break;
 119         default:
 120                 if (state->Vpp != state->Vcc) {
 121                         pr_err("%s(): bad Vpp %u\n", __func__, state->Vpp);
 122                         ret = -1;
 123                 }
 124         }
 125
 126         switch (skt->nr) {
 127         case 0:                  /* we only have 3.3V */
 128                 board_pcmcia_power(power);
 129                 break;
 130
 131 #ifndef CONFIG_MACH_TRIZEPS_CONXS
 132         /* on ConXS we only have one slot. Second is inactive */
 133         case 1:
 134 #endif
 135         default:
 136                 break;
 137         }
 138
 139         return ret;
 140 }
 141
 142 static void trizeps_pcmcia_socket_init(struct soc_pcmcia_socket *skt)
 143 {
 144         /* default is on */
 145         board_pcmcia_power(0x9);
 146 }
 147
 148 static void trizeps_pcmcia_socket_suspend(struct soc_pcmcia_socket *skt)
 149 {
 150         board_pcmcia_power(0x0);
 151 }
 152
 153 static struct pcmcia_low_level trizeps_pcmcia_ops = {
 154         .owner                  = THIS_MODULE,
 155         .hw_init                = trizeps_pcmcia_hw_init,
 156         .socket_state           = trizeps_pcmcia_socket_state,
 157         .configure_socket       = trizeps_pcmcia_configure_socket,
 158         .socket_init            = trizeps_pcmcia_socket_init,
 159         .socket_suspend         = trizeps_pcmcia_socket_suspend,
 160 #ifdef CONFIG_MACH_TRIZEPS_CONXS
 161         .nr                     = 1,
 162 #else
 163         .nr                     = 2,
 164 #endif
 165         .first                  = 0,
 166 };
 167
 168 static struct platform_device *trizeps_pcmcia_device;
 169
 170 static int __init trizeps_pcmcia_init(void)
 171 {
 172         int ret;
 173
 174         if (!machine_is_trizeps4() && !machine_is_trizeps4wl())
 175                 return -ENODEV;
 176
 177         trizeps_pcmcia_device = platform_device_alloc("pxa2xx-pcmcia", -1);
 178         if (!trizeps_pcmcia_device)
 179                 return -ENOMEM;
 180
 181         ret = platform_device_add_data(trizeps_pcmcia_device,
 182                         &trizeps_pcmcia_ops, sizeof(trizeps_pcmcia_ops));
 183
 184         if (ret == 0)
 185                 ret = platform_device_add(trizeps_pcmcia_device);
 186
 187         if (ret)
 188                 platform_device_put(trizeps_pcmcia_device);
 189
 190         return ret;
 191 }
 192
 193 static void __exit trizeps_pcmcia_exit(void)
 194 {
 195         platform_device_unregister(trizeps_pcmcia_device);
 196 }
 197
 198 fs_initcall(trizeps_pcmcia_init);
 199 module_exit(trizeps_pcmcia_exit);
 200
 201 MODULE_LICENSE("GPL");
 202 MODULE_AUTHOR("Juergen Schindele");
 203 MODULE_ALIAS("platform:pxa2xx-pcmcia");