drivers/pcmcia/au1000_pb1x00.c

   1 /*
   2  *
   3  * Alchemy Semi Pb1000 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  * ########################################################################
  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 #include <linux/module.h>
  25 #include <linux/init.h>
  26 #include <linux/delay.h>
  27 #include <linux/ioport.h>
  28 #include <linux/kernel.h>
  29 #include <linux/timer.h>
  30 #include <linux/mm.h>
  31 #include <linux/proc_fs.h>
  32 #include <linux/types.h>
  33
  34 #include <pcmcia/ss.h>
  35 #include <pcmcia/cistpl.h>
  36
  37 #include <asm/io.h>
  38 #include <asm/irq.h>
  39 #include <asm/system.h>
  40
  41 #include <asm/au1000.h>
  42 #include <asm/au1000_pcmcia.h>
  43
  44 #define debug(fmt, arg...) do { } while (0)
  45
  46 #include <asm/pb1000.h>
  47 #define PCMCIA_IRQ AU1000_GPIO_15
  48
  49 static int pb1x00_pcmcia_init(struct pcmcia_init *init)
  50 {
  51         u16 pcr;
  52         pcr = PCR_SLOT_0_RST | PCR_SLOT_1_RST;
  53
  54         au_writel(0x8000, PB1000_MDR); /* clear pcmcia interrupt */
  55         au_sync_delay(100);
  56         au_writel(0x4000, PB1000_MDR); /* enable pcmcia interrupt */
  57         au_sync();
  58
  59         pcr |= SET_VCC_VPP(VCC_HIZ,VPP_HIZ,0);
  60         pcr |= SET_VCC_VPP(VCC_HIZ,VPP_HIZ,1);
  61         au_writel(pcr, PB1000_PCR);
  62         au_sync_delay(20);
  63
  64         return PCMCIA_NUM_SOCKS;
  65 }
  66
  67 static int pb1x00_pcmcia_shutdown(void)
  68 {
  69         u16 pcr;
  70         pcr = PCR_SLOT_0_RST | PCR_SLOT_1_RST;
  71         pcr |= SET_VCC_VPP(VCC_HIZ,VPP_HIZ,0);
  72         pcr |= SET_VCC_VPP(VCC_HIZ,VPP_HIZ,1);
  73         au_writel(pcr, PB1000_PCR);
  74         au_sync_delay(20);
  75         return 0;
  76 }
  77
  78 static int
  79 pb1x00_pcmcia_socket_state(unsigned sock, struct pcmcia_state *state)
  80 {
  81         u32 inserted0, inserted1;
  82         u16 vs0, vs1;
  83
  84         vs0 = vs1 = (u16)au_readl(PB1000_ACR1);
  85         inserted0 = !(vs0 & (ACR1_SLOT_0_CD1 | ACR1_SLOT_0_CD2));
  86         inserted1 = !(vs1 & (ACR1_SLOT_1_CD1 | ACR1_SLOT_1_CD2));
  87         vs0 = (vs0 >> 4) & 0x3;
  88         vs1 = (vs1 >> 12) & 0x3;
  89
  90         state->ready = 0;
  91         state->vs_Xv = 0;
  92         state->vs_3v = 0;
  93         state->detect = 0;
  94
  95         if (sock == 0) {
  96                 if (inserted0) {
  97                         switch (vs0) {
  98                                 case 0:
  99                                 case 2:
 100                                         state->vs_3v=1;
 101                                         break;
 102                                 case 3: /* 5V */
 103                                         break;
 104                                 default:
 105                                         /* return without setting 'detect' */
 106                                         printk(KERN_ERR "pb1x00 bad VS (%d)\n",
 107                                                         vs0);
 108                                         return 0;
 109                         }
 110                         state->detect = 1;
 111                 }
 112         }
 113         else  {
 114                 if (inserted1) {
 115                         switch (vs1) {
 116                                 case 0:
 117                                 case 2:
 118                                         state->vs_3v=1;
 119                                         break;
 120                                 case 3: /* 5V */
 121                                         break;
 122                                 default:
 123                                         /* return without setting 'detect' */
 124                                         printk(KERN_ERR "pb1x00 bad VS (%d)\n",
 125                                                         vs1);
 126                                         return 0;
 127                         }
 128                         state->detect = 1;
 129                 }
 130         }
 131
 132         if (state->detect) {
 133                 state->ready = 1;
 134         }
 135
 136         state->bvd1=1;
 137         state->bvd2=1;
 138         state->wrprot=0;
 139         return 1;
 140 }
 141
 142
 143 static int pb1x00_pcmcia_get_irq_info(struct pcmcia_irq_info *info)
 144 {
 145
 146         if(info->sock > PCMCIA_MAX_SOCK) return -1;
 147
 148         /*
 149          * Even in the case of the Pb1000, both sockets are connected
 150          * to the same irq line.
 151          */
 152         info->irq = PCMCIA_IRQ;
 153
 154         return 0;
 155 }
 156
 157
 158 static int
 159 pb1x00_pcmcia_configure_socket(const struct pcmcia_configure *configure)
 160 {
 161         u16 pcr;
 162
 163         if(configure->sock > PCMCIA_MAX_SOCK) return -1;
 164
 165         pcr = au_readl(PB1000_PCR);
 166
 167         if (configure->sock == 0) {
 168                 pcr &= ~(PCR_SLOT_0_VCC0 | PCR_SLOT_0_VCC1 |
 169                                 PCR_SLOT_0_VPP0 | PCR_SLOT_0_VPP1);
 170         }
 171         else  {
 172                 pcr &= ~(PCR_SLOT_1_VCC0 | PCR_SLOT_1_VCC1 |
 173                                 PCR_SLOT_1_VPP0 | PCR_SLOT_1_VPP1);
 174         }
 175
 176         pcr &= ~PCR_SLOT_0_RST;
 177         debug("Vcc %dV Vpp %dV, pcr %x\n",
 178                         configure->vcc, configure->vpp, pcr);
 179         switch(configure->vcc){
 180                 case 0:  /* Vcc 0 */
 181                         switch(configure->vpp) {
 182                                 case 0:
 183                                         pcr |= SET_VCC_VPP(VCC_HIZ,VPP_GND,
 184                                                         configure->sock);
 185                                         break;
 186                                 case 12:
 187                                         pcr |= SET_VCC_VPP(VCC_HIZ,VPP_12V,
 188                                                         configure->sock);
 189                                         break;
 190                                 case 50:
 191                                         pcr |= SET_VCC_VPP(VCC_HIZ,VPP_5V,
 192                                                         configure->sock);
 193                                         break;
 194                                 case 33:
 195                                         pcr |= SET_VCC_VPP(VCC_HIZ,VPP_3V,
 196                                                         configure->sock);
 197                                         break;
 198                                 default:
 199                                         pcr |= SET_VCC_VPP(VCC_HIZ,VPP_HIZ,
 200                                                         configure->sock);
 201                                         printk("%s: bad Vcc/Vpp (%d:%d)\n",
 202                                                         __func__,
 203                                                         configure->vcc,
 204                                                         configure->vpp);
 205                                         break;
 206                         }
 207                         break;
 208                 case 50: /* Vcc 5V */
 209                         switch(configure->vpp) {
 210                                 case 0:
 211                                         pcr |= SET_VCC_VPP(VCC_5V,VPP_GND,
 212                                                         configure->sock);
 213                                         break;
 214                                 case 50:
 215                                         pcr |= SET_VCC_VPP(VCC_5V,VPP_5V,
 216                                                         configure->sock);
 217                                         break;
 218                                 case 12:
 219                                         pcr |= SET_VCC_VPP(VCC_5V,VPP_12V,
 220                                                         configure->sock);
 221                                         break;
 222                                 case 33:
 223                                         pcr |= SET_VCC_VPP(VCC_5V,VPP_3V,
 224                                                         configure->sock);
 225                                         break;
 226                                 default:
 227                                         pcr |= SET_VCC_VPP(VCC_HIZ,VPP_HIZ,
 228                                                         configure->sock);
 229                                         printk("%s: bad Vcc/Vpp (%d:%d)\n",
 230                                                         __func__,
 231                                                         configure->vcc,
 232                                                         configure->vpp);
 233                                         break;
 234                         }
 235                         break;
 236                 case 33: /* Vcc 3.3V */
 237                         switch(configure->vpp) {
 238                                 case 0:
 239                                         pcr |= SET_VCC_VPP(VCC_3V,VPP_GND,
 240                                                         configure->sock);
 241                                         break;
 242                                 case 50:
 243                                         pcr |= SET_VCC_VPP(VCC_3V,VPP_5V,
 244                                                         configure->sock);
 245                                         break;
 246                                 case 12:
 247                                         pcr |= SET_VCC_VPP(VCC_3V,VPP_12V,
 248                                                         configure->sock);
 249                                         break;
 250                                 case 33:
 251                                         pcr |= SET_VCC_VPP(VCC_3V,VPP_3V,
 252                                                         configure->sock);
 253                                         break;
 254                                 default:
 255                                         pcr |= SET_VCC_VPP(VCC_HIZ,VPP_HIZ,
 256                                                         configure->sock);
 257                                         printk("%s: bad Vcc/Vpp (%d:%d)\n",
 258                                                         __func__,
 259                                                         configure->vcc,
 260                                                         configure->vpp);
 261                                         break;
 262                         }
 263                         break;
 264                 default: /* what's this ? */
 265                         pcr |= SET_VCC_VPP(VCC_HIZ,VPP_HIZ,configure->sock);
 266                         printk(KERN_ERR "%s: bad Vcc %d\n",
 267                                         __func__, configure->vcc);
 268                         break;
 269         }
 270
 271         if (configure->sock == 0) {
 272         pcr &= ~(PCR_SLOT_0_RST);
 273                 if (configure->reset)
 274                 pcr |= PCR_SLOT_0_RST;
 275         }
 276         else {
 277                 pcr &= ~(PCR_SLOT_1_RST);
 278                 if (configure->reset)
 279                         pcr |= PCR_SLOT_1_RST;
 280         }
 281         au_writel(pcr, PB1000_PCR);
 282         au_sync_delay(300);
 283
 284         return 0;
 285 }
 286
 287
 288 struct pcmcia_low_level pb1x00_pcmcia_ops = {
 289         pb1x00_pcmcia_init,
 290         pb1x00_pcmcia_shutdown,
 291         pb1x00_pcmcia_socket_state,
 292         pb1x00_pcmcia_get_irq_info,
 293         pb1x00_pcmcia_configure_socket
 294 };