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/timer.h>
  34 #include <linux/mm.h>
  35 #include <linux/proc_fs.h>
  36 #include <linux/types.h>
  37
  38 #include <pcmcia/cs_types.h>
  39 #include <pcmcia/cs.h>
  40 #include <pcmcia/ss.h>
  41 #include <pcmcia/cistpl.h>
  42 #include <pcmcia/bus_ops.h>
  43
  44 #include <asm/io.h>
  45 #include <asm/irq.h>
  46 #include <asm/system.h>
  47
  48 #include <asm/au1000.h>
  49 #include <asm/au1000_pcmcia.h>
  50
  51 #define PCMCIA_MAX_SOCK         0
  52 #define PCMCIA_NUM_SOCKS        (PCMCIA_MAX_SOCK + 1)
  53 #define PCMCIA_IRQ              AU1000_GPIO_4
  54
  55 #if 0
  56 #define DEBUG(x, args...)       printk(__func__ ": " x, ##args)
  57 #else
  58 #define DEBUG(x,args...)
  59 #endif
  60
  61 static int xxs1500_pcmcia_init(struct pcmcia_init *init)
  62 {
  63         return PCMCIA_NUM_SOCKS;
  64 }
  65
  66 static int xxs1500_pcmcia_shutdown(void)
  67 {
  68         /* turn off power */
  69         au_writel(au_readl(GPIO2_PINSTATE) | (1<<14)|(1<<30),
  70                         GPIO2_OUTPUT);
  71         au_sync_delay(100);
  72
  73         /* assert reset */
  74         au_writel(au_readl(GPIO2_PINSTATE) | (1<<4)|(1<<20),
  75                         GPIO2_OUTPUT);
  76         au_sync_delay(100);
  77         return 0;
  78 }
  79
  80
  81 static int
  82 xxs1500_pcmcia_socket_state(unsigned sock, struct pcmcia_state *state)
  83 {
  84         u32 inserted; u32 vs;
  85         unsigned long gpio, gpio2;
  86
  87         if(sock > PCMCIA_MAX_SOCK) return -1;
  88
  89         gpio = au_readl(SYS_PINSTATERD);
  90         gpio2 = au_readl(GPIO2_PINSTATE);
  91
  92         vs = gpio2 & ((1<<8) | (1<<9));
  93         inserted = (!(gpio & 0x1) && !(gpio & 0x2));
  94
  95         state->ready = 0;
  96         state->vs_Xv = 0;
  97         state->vs_3v = 0;
  98         state->detect = 0;
  99
 100         if (inserted) {
 101                 switch (vs) {
 102                         case 0:
 103                         case 1:
 104                         case 2:
 105                                 state->vs_3v=1;
 106                                 break;
 107                         case 3: /* 5V */
 108                         default:
 109                                 /* return without setting 'detect' */
 110                                 printk(KERN_ERR "au1x00_cs: unsupported VS\n",
 111                                                 vs);
 112                                 return;
 113                 }
 114                 state->detect = 1;
 115         }
 116
 117         if (state->detect) {
 118                 state->ready = 1;
 119         }
 120
 121         state->bvd1= gpio2 & (1<<10);
 122         state->bvd2 = gpio2 & (1<<11);
 123         state->wrprot=0;
 124         return 1;
 125 }
 126
 127
 128 static int xxs1500_pcmcia_get_irq_info(struct pcmcia_irq_info *info)
 129 {
 130
 131         if(info->sock > PCMCIA_MAX_SOCK) return -1;
 132         info->irq = PCMCIA_IRQ;
 133         return 0;
 134 }
 135
 136
 137 static int
 138 xxs1500_pcmcia_configure_socket(const struct pcmcia_configure *configure)
 139 {
 140
 141         if(configure->sock > PCMCIA_MAX_SOCK) return -1;
 142
 143         DEBUG("Vcc %dV Vpp %dV, reset %d\n",
 144                         configure->vcc, configure->vpp, configure->reset);
 145
 146         switch(configure->vcc){
 147                 case 33: /* Vcc 3.3V */
 148                         /* turn on power */
 149                         DEBUG("turn on power\n");
 150                         au_writel((au_readl(GPIO2_PINSTATE) & ~(1<<14))|(1<<30),
 151                                         GPIO2_OUTPUT);
 152                         au_sync_delay(100);
 153                         break;
 154                 case 50: /* Vcc 5V */
 155                 default: /* what's this ? */
 156                         printk(KERN_ERR "au1x00_cs: unsupported VCC\n");
 157                 case 0:  /* Vcc 0 */
 158                         /* turn off power */
 159                         au_sync_delay(100);
 160                         au_writel(au_readl(GPIO2_PINSTATE) | (1<<14)|(1<<30),
 161                                         GPIO2_OUTPUT);
 162                         break;
 163         }
 164
 165         if (!configure->reset) {
 166                 DEBUG("deassert reset\n");
 167                 au_writel((au_readl(GPIO2_PINSTATE) & ~(1<<4))|(1<<20),
 168                                 GPIO2_OUTPUT);
 169                 au_sync_delay(100);
 170                 au_writel((au_readl(GPIO2_PINSTATE) & ~(1<<5))|(1<<21),
 171                                 GPIO2_OUTPUT);
 172         }
 173         else {
 174                 DEBUG("assert reset\n");
 175                 au_writel(au_readl(GPIO2_PINSTATE) | (1<<4)|(1<<20),
 176                                 GPIO2_OUTPUT);
 177         }
 178         au_sync_delay(100);
 179         return 0;
 180 }
 181
 182 struct pcmcia_low_level xxs1500_pcmcia_ops = {
 183         xxs1500_pcmcia_init,
 184         xxs1500_pcmcia_shutdown,
 185         xxs1500_pcmcia_socket_state,
 186         xxs1500_pcmcia_get_irq_info,
 187         xxs1500_pcmcia_configure_socket
 188 };