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/bulkmem.h>
  43 #include <pcmcia/cistpl.h>
  44 #include <pcmcia/bus_ops.h>
  45 #include "cs_internal.h"
  46
  47 #include <asm/io.h>
  48 #include <asm/irq.h>
  49 #include <asm/system.h>
  50
  51 #include <asm/au1000.h>
  52 #include <asm/au1000_pcmcia.h>
  53
  54 #define PCMCIA_MAX_SOCK         0
  55 #define PCMCIA_NUM_SOCKS        (PCMCIA_MAX_SOCK + 1)
  56 #define PCMCIA_IRQ              AU1000_GPIO_4
  57
  58 #if 0
  59 #define DEBUG(x, args...)       printk(__func__ ": " x, ##args)
  60 #else
  61 #define DEBUG(x,args...)
  62 #endif
  63
  64 static int xxs1500_pcmcia_init(struct pcmcia_init *init)
  65 {
  66         return PCMCIA_NUM_SOCKS;
  67 }
  68
  69 static int xxs1500_pcmcia_shutdown(void)
  70 {
  71         /* turn off power */
  72         au_writel(au_readl(GPIO2_PINSTATE) | (1<<14)|(1<<30),
  73                         GPIO2_OUTPUT);
  74         au_sync_delay(100);
  75
  76         /* assert reset */
  77         au_writel(au_readl(GPIO2_PINSTATE) | (1<<4)|(1<<20),
  78                         GPIO2_OUTPUT);
  79         au_sync_delay(100);
  80         return 0;
  81 }
  82
  83
  84 static int
  85 xxs1500_pcmcia_socket_state(unsigned sock, struct pcmcia_state *state)
  86 {
  87         u32 inserted; u32 vs;
  88         unsigned long gpio, gpio2;
  89
  90         if(sock > PCMCIA_MAX_SOCK) return -1;
  91
  92         gpio = au_readl(SYS_PINSTATERD);
  93         gpio2 = au_readl(GPIO2_PINSTATE);
  94
  95         vs = gpio2 & ((1<<8) | (1<<9));
  96         inserted = (!(gpio & 0x1) && !(gpio & 0x2));
  97
  98         state->ready = 0;
  99         state->vs_Xv = 0;
 100         state->vs_3v = 0;
 101         state->detect = 0;
 102
 103         if (inserted) {
 104                 switch (vs) {
 105                         case 0:
 106                         case 1:
 107                         case 2:
 108                                 state->vs_3v=1;
 109                                 break;
 110                         case 3: /* 5V */
 111                         default:
 112                                 /* return without setting 'detect' */
 113                                 printk(KERN_ERR "au1x00_cs: unsupported VS\n",
 114                                                 vs);
 115                                 return;
 116                 }
 117                 state->detect = 1;
 118         }
 119
 120         if (state->detect) {
 121                 state->ready = 1;
 122         }
 123
 124         state->bvd1= gpio2 & (1<<10);
 125         state->bvd2 = gpio2 & (1<<11);
 126         state->wrprot=0;
 127         return 1;
 128 }
 129
 130
 131 static int xxs1500_pcmcia_get_irq_info(struct pcmcia_irq_info *info)
 132 {
 133
 134         if(info->sock > PCMCIA_MAX_SOCK) return -1;
 135         info->irq = PCMCIA_IRQ;
 136         return 0;
 137 }
 138
 139
 140 static int
 141 xxs1500_pcmcia_configure_socket(const struct pcmcia_configure *configure)
 142 {
 143
 144         if(configure->sock > PCMCIA_MAX_SOCK) return -1;
 145
 146         DEBUG("Vcc %dV Vpp %dV, reset %d\n",
 147                         configure->vcc, configure->vpp, configure->reset);
 148
 149         switch(configure->vcc){
 150                 case 33: /* Vcc 3.3V */
 151                         /* turn on power */
 152                         DEBUG("turn on power\n");
 153                         au_writel((au_readl(GPIO2_PINSTATE) & ~(1<<14))|(1<<30),
 154                                         GPIO2_OUTPUT);
 155                         au_sync_delay(100);
 156                         break;
 157                 case 50: /* Vcc 5V */
 158                 default: /* what's this ? */
 159                         printk(KERN_ERR "au1x00_cs: unsupported VCC\n");
 160                 case 0:  /* Vcc 0 */
 161                         /* turn off power */
 162                         au_sync_delay(100);
 163                         au_writel(au_readl(GPIO2_PINSTATE) | (1<<14)|(1<<30),
 164                                         GPIO2_OUTPUT);
 165                         break;
 166         }
 167
 168         if (!configure->reset) {
 169                 DEBUG("deassert reset\n");
 170                 au_writel((au_readl(GPIO2_PINSTATE) & ~(1<<4))|(1<<20),
 171                                 GPIO2_OUTPUT);
 172                 au_sync_delay(100);
 173                 au_writel((au_readl(GPIO2_PINSTATE) & ~(1<<5))|(1<<21),
 174                                 GPIO2_OUTPUT);
 175         }
 176         else {
 177                 DEBUG("assert reset\n");
 178                 au_writel(au_readl(GPIO2_PINSTATE) | (1<<4)|(1<<20),
 179                                 GPIO2_OUTPUT);
 180         }
 181         au_sync_delay(100);
 182         return 0;
 183 }
 184
 185 struct pcmcia_low_level xxs1500_pcmcia_ops = {
 186         xxs1500_pcmcia_init,
 187         xxs1500_pcmcia_shutdown,
 188         xxs1500_pcmcia_socket_state,
 189         xxs1500_pcmcia_get_irq_info,
 190         xxs1500_pcmcia_configure_socket
 191 };