linux/drivers/pcmcia/au1000_xxs1500.c
<<
>>
Prefs
   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
  62static int xxs1500_pcmcia_init(struct pcmcia_init *init)
  63{
  64        return PCMCIA_NUM_SOCKS;
  65}
  66
  67static 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
  82static int
  83xxs1500_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
 129static 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
 138static int
 139xxs1500_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
 183struct 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};
 190