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