drivers/pcmcia/au1000_db1x00.c

   1 /*
   2  *
   3  * Alchemy Semi Db1x00 boards specific pcmcia routines.
   4  *
   5  * Copyright 2002 MontaVista Software Inc.
   6  * Author: MontaVista Software, Inc.
   7  *              ppopov@mvista.com or source@mvista.com
   8  *
   9  * Copyright 2004 Pete Popov, updated the driver to 2.6.
  10  * Followed the sa11xx API and largely copied many of the hardware
  11  * independent functions.
  12  *
  13  * ########################################################################
  14  *
  15  *  This program is free software; you can distribute it and/or modify it
  16  *  under the terms of the GNU General Public License (Version 2) as
  17  *  published by the Free Software Foundation.
  18  *
  19  *  This program is distributed in the hope it will be useful, but WITHOUT
  20  *  ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  21  *  FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  22  *  for more details.
  23  *
  24  *  You should have received a copy of the GNU General Public License along
  25  *  with this program; if not, write to the Free Software Foundation, Inc.,
  26  *  59 Temple Place - Suite 330, Boston MA 02111-1307, USA.
  27  *
  28  * ########################################################################
  29  *
  30  *
  31  */
  32
  33 #include <linux/config.h>
  34 #include <linux/module.h>
  35 #include <linux/kernel.h>
  36 #include <linux/errno.h>
  37 #include <linux/interrupt.h>
  38 #include <linux/device.h>
  39 #include <linux/init.h>
  40
  41 #include <asm/irq.h>
  42 #include <asm/signal.h>
  43 #include <asm/mach-au1x00/au1000.h>
  44
  45 #if defined(CONFIG_MIPS_DB1200)
  46         #include <db1200.h>
  47 #elif defined(CONFIG_MIPS_PB1200)
  48         #include <pb1200.h>
  49 #else
  50         #include <asm/mach-db1x00/db1x00.h>
  51         static BCSR * const bcsr = (BCSR *)BCSR_KSEG1_ADDR;
  52 #endif
  53
  54 #include "au1000_generic.h"
  55
  56 #if 0
  57 #define debug(x,args...) printk(KERN_DEBUG "%s: " x, __func__ , ##args)
  58 #else
  59 #define debug(x,args...)
  60 #endif
  61
  62
  63 struct au1000_pcmcia_socket au1000_pcmcia_socket[PCMCIA_NUM_SOCKS];
  64 extern int au1x00_pcmcia_socket_probe(struct device *, struct pcmcia_low_level *, int, int);
  65
  66 static int db1x00_pcmcia_hw_init(struct au1000_pcmcia_socket *skt)
  67 {
  68 #ifdef CONFIG_MIPS_DB1550
  69         skt->irq = skt->nr ? AU1000_GPIO_5 : AU1000_GPIO_3;
  70 #elif defined(CONFIG_MIPS_DB1200) || defined(CONFIG_MIPS_PB1200)
  71         skt->irq = skt->nr ? BOARD_PC1_INT : BOARD_PC0_INT;
  72 #else
  73         skt->irq = skt->nr ? AU1000_GPIO_5 : AU1000_GPIO_2;
  74 #endif
  75         return 0;
  76 }
  77
  78 static void db1x00_pcmcia_shutdown(struct au1000_pcmcia_socket *skt)
  79 {
  80         bcsr->pcmcia = 0; /* turn off power */
  81         au_sync_delay(2);
  82 }
  83
  84 static void
  85 db1x00_pcmcia_socket_state(struct au1000_pcmcia_socket *skt, struct pcmcia_state *state)
  86 {
  87         u32 inserted;
  88         unsigned char vs;
  89
  90         state->ready = 0;
  91         state->vs_Xv = 0;
  92         state->vs_3v = 0;
  93         state->detect = 0;
  94
  95         switch (skt->nr) {
  96         case 0:
  97                 vs = bcsr->status & 0x3;
  98 #if defined(CONFIG_MIPS_DB1200) || defined(CONFIG_MIPS_PB1200)
  99                 inserted = BOARD_CARD_INSERTED(0);
 100 #else
 101                 inserted = !(bcsr->status & (1<<4));
 102 #endif
 103                 break;
 104         case 1:
 105                 vs = (bcsr->status & 0xC)>>2;
 106 #if defined(CONFIG_MIPS_DB1200) || defined(CONFIG_MIPS_PB1200)
 107                 inserted = BOARD_CARD_INSERTED(1);
 108 #else
 109                 inserted = !(bcsr->status & (1<<5));
 110 #endif
 111                 break;
 112         default:/* should never happen */
 113                 return;
 114         }
 115
 116         if (inserted)
 117                 debug("db1x00 socket %d: inserted %d, vs %d pcmcia %x\n",
 118                                 skt->nr, inserted, vs, bcsr->pcmcia);
 119
 120         if (inserted) {
 121                 switch (vs) {
 122                         case 0:
 123                         case 2:
 124                                 state->vs_3v=1;
 125                                 break;
 126                         case 3: /* 5V */
 127                                 break;
 128                         default:
 129                                 /* return without setting 'detect' */
 130                                 printk(KERN_ERR "db1x00 bad VS (%d)\n",
 131                                                 vs);
 132                 }
 133                 state->detect = 1;
 134                 state->ready = 1;
 135         }
 136         else {
 137                 /* if the card was previously inserted and then ejected,
 138                  * we should turn off power to it
 139                  */
 140                 if ((skt->nr == 0) && (bcsr->pcmcia & BCSR_PCMCIA_PC0RST)) {
 141                         bcsr->pcmcia &= ~(BCSR_PCMCIA_PC0RST |
 142                                         BCSR_PCMCIA_PC0DRVEN |
 143                                         BCSR_PCMCIA_PC0VPP |
 144                                         BCSR_PCMCIA_PC0VCC);
 145                         au_sync_delay(10);
 146                 }
 147                 else if ((skt->nr == 1) && bcsr->pcmcia & BCSR_PCMCIA_PC1RST) {
 148                         bcsr->pcmcia &= ~(BCSR_PCMCIA_PC1RST |
 149                                         BCSR_PCMCIA_PC1DRVEN |
 150                                         BCSR_PCMCIA_PC1VPP |
 151                                         BCSR_PCMCIA_PC1VCC);
 152                         au_sync_delay(10);
 153                 }
 154         }
 155
 156         state->bvd1=1;
 157         state->bvd2=1;
 158         state->wrprot=0;
 159 }
 160
 161 static int
 162 db1x00_pcmcia_configure_socket(struct au1000_pcmcia_socket *skt, struct socket_state_t *state)
 163 {
 164         u16 pwr;
 165         int sock = skt->nr;
 166
 167         debug("config_skt %d Vcc %dV Vpp %dV, reset %d\n",
 168                         sock, state->Vcc, state->Vpp,
 169                         state->flags & SS_RESET);
 170
 171         /* pcmcia reg was set to zero at init time. Be careful when
 172          * initializing a socket not to wipe out the settings of the
 173          * other socket.
 174          */
 175         pwr = bcsr->pcmcia;
 176         pwr &= ~(0xf << sock*8); /* clear voltage settings */
 177
 178         state->Vpp = 0;
 179         switch(state->Vcc){
 180                 case 0:  /* Vcc 0 */
 181                         pwr |= SET_VCC_VPP(0,0,sock);
 182                         break;
 183                 case 50: /* Vcc 5V */
 184                         switch(state->Vpp) {
 185                                 case 0:
 186                                         pwr |= SET_VCC_VPP(2,0,sock);
 187                                         break;
 188                                 case 50:
 189                                         pwr |= SET_VCC_VPP(2,1,sock);
 190                                         break;
 191                                 case 12:
 192                                         pwr |= SET_VCC_VPP(2,2,sock);
 193                                         break;
 194                                 case 33:
 195                                 default:
 196                                         pwr |= SET_VCC_VPP(0,0,sock);
 197                                         printk("%s: bad Vcc/Vpp (%d:%d)\n",
 198                                                         __FUNCTION__,
 199                                                         state->Vcc,
 200                                                         state->Vpp);
 201                                         break;
 202                         }
 203                         break;
 204                 case 33: /* Vcc 3.3V */
 205                         switch(state->Vpp) {
 206                                 case 0:
 207                                         pwr |= SET_VCC_VPP(1,0,sock);
 208                                         break;
 209                                 case 12:
 210                                         pwr |= SET_VCC_VPP(1,2,sock);
 211                                         break;
 212                                 case 33:
 213                                         pwr |= SET_VCC_VPP(1,1,sock);
 214                                         break;
 215                                 case 50:
 216                                 default:
 217                                         pwr |= SET_VCC_VPP(0,0,sock);
 218                                         printk("%s: bad Vcc/Vpp (%d:%d)\n",
 219                                                         __FUNCTION__,
 220                                                         state->Vcc,
 221                                                         state->Vpp);
 222                                         break;
 223                         }
 224                         break;
 225                 default: /* what's this ? */
 226                         pwr |= SET_VCC_VPP(0,0,sock);
 227                         printk(KERN_ERR "%s: bad Vcc %d\n",
 228                                         __FUNCTION__, state->Vcc);
 229                         break;
 230         }
 231
 232         bcsr->pcmcia = pwr;
 233         au_sync_delay(300);
 234
 235         if (sock == 0) {
 236                 if (!(state->flags & SS_RESET)) {
 237                         pwr |= BCSR_PCMCIA_PC0DRVEN;
 238                         bcsr->pcmcia = pwr;
 239                         au_sync_delay(300);
 240                         pwr |= BCSR_PCMCIA_PC0RST;
 241                         bcsr->pcmcia = pwr;
 242                         au_sync_delay(100);
 243                 }
 244                 else {
 245                         pwr &= ~(BCSR_PCMCIA_PC0RST | BCSR_PCMCIA_PC0DRVEN);
 246                         bcsr->pcmcia = pwr;
 247                         au_sync_delay(100);
 248                 }
 249         }
 250         else {
 251                 if (!(state->flags & SS_RESET)) {
 252                         pwr |= BCSR_PCMCIA_PC1DRVEN;
 253                         bcsr->pcmcia = pwr;
 254                         au_sync_delay(300);
 255                         pwr |= BCSR_PCMCIA_PC1RST;
 256                         bcsr->pcmcia = pwr;
 257                         au_sync_delay(100);
 258                 }
 259                 else {
 260                         pwr &= ~(BCSR_PCMCIA_PC1RST | BCSR_PCMCIA_PC1DRVEN);
 261                         bcsr->pcmcia = pwr;
 262                         au_sync_delay(100);
 263                 }
 264         }
 265         return 0;
 266 }
 267
 268 /*
 269  * Enable card status IRQs on (re-)initialisation.  This can
 270  * be called at initialisation, power management event, or
 271  * pcmcia event.
 272  */
 273 void db1x00_socket_init(struct au1000_pcmcia_socket *skt)
 274 {
 275         /* nothing to do for now */
 276 }
 277
 278 /*
 279  * Disable card status IRQs and PCMCIA bus on suspend.
 280  */
 281 void db1x00_socket_suspend(struct au1000_pcmcia_socket *skt)
 282 {
 283         /* nothing to do for now */
 284 }
 285
 286 struct pcmcia_low_level db1x00_pcmcia_ops = {
 287         .owner                  = THIS_MODULE,
 288
 289         .hw_init                = db1x00_pcmcia_hw_init,
 290         .hw_shutdown            = db1x00_pcmcia_shutdown,
 291
 292         .socket_state           = db1x00_pcmcia_socket_state,
 293         .configure_socket       = db1x00_pcmcia_configure_socket,
 294
 295         .socket_init            = db1x00_socket_init,
 296         .socket_suspend         = db1x00_socket_suspend
 297 };
 298
 299 int __init au1x_board_init(struct device *dev)
 300 {
 301         int ret = -ENODEV;
 302         bcsr->pcmcia = 0; /* turn off power, if it's not already off */
 303         au_sync_delay(2);
 304         ret = au1x00_pcmcia_socket_probe(dev, &db1x00_pcmcia_ops, 0, 2);
 305         return ret;
 306 }