drivers/pcmcia/au1000_xxs1500.c

   1 /*
   2  *
   3  * MyCable board specific pcmcia routines.
   4  *
   5  * Copyright 2003 MontaVista Software Inc.
   6  * Author: Pete Popov, MontaVista Software, Inc.
   7  *              ppopov@mvista.com or source@mvista.com
   8  *
   9  * ########################################################################
  10  *
  11  *  This program is free software; you can distribute it and/or modify it
  12  *  under the terms of the GNU General Public License (Version 2) as
  13  *  published by the Free Software Foundation.
  14  *
  15  *  This program is distributed in the hope it will be useful, but WITHOUT
  16  *  ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  17  *  FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  18  *  for more details.
  19  *
  20  *  You should have received a copy of the GNU General Public License along
  21  *  with this program; if not, write to the Free Software Foundation, Inc.,
  22  *  59 Temple Place - Suite 330, Boston MA 02111-1307, USA.
  23  *
  24  * ########################################################################
  25  *
  26  *
  27  */
  28 #include <linux/module.h>
  29 #include <linux/init.h>
  30 #include <linux/delay.h>
  31 #include <linux/ioport.h>
  32 #include <linux/kernel.h>
  33 #include <linux/tqueue.h>
  34 #include <linux/timer.h>
  35 #include <linux/mm.h>
  36 #include <linux/proc_fs.h>
  37 #include <linux/types.h>
  38
  39 #include <pcmcia/cs_types.h>
  40 #include <pcmcia/cs.h>
  41 #include <pcmcia/ss.h>
  42 #include <pcmcia/cistpl.h>
  43 #include <pcmcia/bus_ops.h>
  44 #include "cs_internal.h"
  45
  46 #include <asm/io.h>
  47 #include <asm/irq.h>
  48 #include <asm/system.h>
  49
  50 #include <asm/au1000.h>
  51 #include <asm/au1000_pcmcia.h>
  52
  53 #define PCMCIA_MAX_SOCK         0
  54 #define PCMCIA_NUM_SOCKS        (PCMCIA_MAX_SOCK + 1)
  55 #define PCMCIA_IRQ              AU1000_GPIO_4
  56
  57 #if 0
  58 #define DEBUG(x, args...)       printk(__func__ ": " x, ##args)
  59 #else
  60 #define DEBUG(x,args...)
  61 #endif
  62
  63 static int xxs1500_pcmcia_init(struct pcmcia_init *init)
  64 {
  65         return PCMCIA_NUM_SOCKS;
  66 }
  67
  68 static int xxs1500_pcmcia_shutdown(void)
  69 {
  70         /* turn off power */
  71         au_writel(au_readl(GPIO2_PINSTATE) | (1<<14)|(1<<30),
  72                         GPIO2_OUTPUT);
  73         au_sync_delay(100);
  74
  75         /* assert reset */
  76         au_writel(au_readl(GPIO2_PINSTATE) | (1<<4)|(1<<20),
  77                         GPIO2_OUTPUT);
  78         au_sync_delay(100);
  79         return 0;
  80 }
  81
  82
  83 static int
  84 xxs1500_pcmcia_socket_state(unsigned sock, struct pcmcia_state *state)
  85 {
  86         u32 inserted; u32 vs;
  87         unsigned long gpio, gpio2;
  88
  89         if(sock > PCMCIA_MAX_SOCK) return -1;
  90
  91         gpio = au_readl(SYS_PINSTATERD);
  92         gpio2 = au_readl(GPIO2_PINSTATE);
  93
  94         vs = gpio2 & ((1<<8) | (1<<9));
  95         inserted = (!(gpio & 0x1) && !(gpio & 0x2));
  96
  97         state->ready = 0;
  98         state->vs_Xv = 0;
  99         state->vs_3v = 0;
 100         state->detect = 0;
 101
 102         if (inserted) {
 103                 switch (vs) {
 104                         case 0:
 105                         case 1:
 106                         case 2:
 107                                 state->vs_3v=1;
 108                                 break;
 109                         case 3: /* 5V */
 110                         default:
 111                                 /* return without setting 'detect' */
 112                                 printk(KERN_ERR "au1x00_cs: unsupported VS\n",
 113                                                 vs);
 114                                 return;
 115                 }
 116                 state->detect = 1;
 117         }
 118
 119         if (state->detect) {
 120                 state->ready = 1;
 121         }
 122
 123         state->bvd1= gpio2 & (1<<10);
 124         state->bvd2 = gpio2 & (1<<11);
 125         state->wrprot=0;
 126         return 1;
 127 }
 128
 129
 130 static int xxs1500_pcmcia_get_irq_info(struct pcmcia_irq_info *info)
 131 {
 132
 133         if(info->sock > PCMCIA_MAX_SOCK) return -1;
 134         info->irq = PCMCIA_IRQ;
 135         return 0;
 136 }
 137
 138
 139 static int
 140 xxs1500_pcmcia_configure_socket(const struct pcmcia_configure *configure)
 141 {
 142
 143         if(configure->sock > PCMCIA_MAX_SOCK) return -1;
 144
 145         DEBUG("Vcc %dV Vpp %dV, reset %d\n",
 146                         configure->vcc, configure->vpp, configure->reset);
 147
 148         switch(configure->vcc){
 149                 case 33: /* Vcc 3.3V */
 150                         /* turn on power */
 151                         DEBUG("turn on power\n");
 152                         au_writel((au_readl(GPIO2_PINSTATE) & ~(1<<14))|(1<<30),
 153                                         GPIO2_OUTPUT);
 154                         au_sync_delay(100);
 155                         break;
 156                 case 50: /* Vcc 5V */
 157                 default: /* what's this ? */
 158                         printk(KERN_ERR "au1x00_cs: unsupported VCC\n");
 159                 case 0:  /* Vcc 0 */
 160                         /* turn off power */
 161                         au_sync_delay(100);
 162                         au_writel(au_readl(GPIO2_PINSTATE) | (1<<14)|(1<<30),
 163                                         GPIO2_OUTPUT);
 164                         break;
 165         }
 166
 167         if (!configure->reset) {
 168                 DEBUG("deassert reset\n");
 169                 au_writel((au_readl(GPIO2_PINSTATE) & ~(1<<4))|(1<<20),
 170                                 GPIO2_OUTPUT);
 171                 au_sync_delay(100);
 172                 au_writel((au_readl(GPIO2_PINSTATE) & ~(1<<5))|(1<<21),
 173                                 GPIO2_OUTPUT);
 174         }
 175         else {
 176                 DEBUG("assert reset\n");
 177                 au_writel(au_readl(GPIO2_PINSTATE) | (1<<4)|(1<<20),
 178                                 GPIO2_OUTPUT);
 179         }
 180         au_sync_delay(100);
 181         return 0;
 182 }
 183
 184 struct pcmcia_low_level xxs1500_pcmcia_ops = {
 185         xxs1500_pcmcia_init,
 186         xxs1500_pcmcia_shutdown,
 187         xxs1500_pcmcia_socket_state,
 188         xxs1500_pcmcia_get_irq_info,
 189         xxs1500_pcmcia_configure_socket
 190 };