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/cs.h>
  35 #include <pcmcia/ss.h>
  36 #include <pcmcia/cistpl.h>
  37
  38 #include <asm/io.h>
  39 #include <asm/irq.h>
  40 #include <asm/system.h>
  41
  42 #include <asm/au1000.h>
  43 #include <asm/au1000_pcmcia.h>
  44
  45 #define debug(fmt, arg...) do { } while (0)
  46
  47 #include <asm/pb1000.h>
  48 #define PCMCIA_IRQ AU1000_GPIO_15
  49
  50 static int pb1x00_pcmcia_init(struct pcmcia_init *init)
  51 {
  52         u16 pcr;
  53         pcr = PCR_SLOT_0_RST | PCR_SLOT_1_RST;
  54
  55         au_writel(0x8000, PB1000_MDR); /* clear pcmcia interrupt */
  56         au_sync_delay(100);
  57         au_writel(0x4000, PB1000_MDR); /* enable pcmcia interrupt */
  58         au_sync();
  59
  60         pcr |= SET_VCC_VPP(VCC_HIZ,VPP_HIZ,0);
  61         pcr |= SET_VCC_VPP(VCC_HIZ,VPP_HIZ,1);
  62         au_writel(pcr, PB1000_PCR);
  63         au_sync_delay(20);
  64
  65         return PCMCIA_NUM_SOCKS;
  66 }
  67
  68 static int pb1x00_pcmcia_shutdown(void)
  69 {
  70         u16 pcr;
  71         pcr = PCR_SLOT_0_RST | PCR_SLOT_1_RST;
  72         pcr |= SET_VCC_VPP(VCC_HIZ,VPP_HIZ,0);
  73         pcr |= SET_VCC_VPP(VCC_HIZ,VPP_HIZ,1);
  74         au_writel(pcr, PB1000_PCR);
  75         au_sync_delay(20);
  76         return 0;
  77 }
  78
  79 static int
  80 pb1x00_pcmcia_socket_state(unsigned sock, struct pcmcia_state *state)
  81 {
  82         u32 inserted0, inserted1;
  83         u16 vs0, vs1;
  84
  85         vs0 = vs1 = (u16)au_readl(PB1000_ACR1);
  86         inserted0 = !(vs0 & (ACR1_SLOT_0_CD1 | ACR1_SLOT_0_CD2));
  87         inserted1 = !(vs1 & (ACR1_SLOT_1_CD1 | ACR1_SLOT_1_CD2));
  88         vs0 = (vs0 >> 4) & 0x3;
  89         vs1 = (vs1 >> 12) & 0x3;
  90
  91         state->ready = 0;
  92         state->vs_Xv = 0;
  93         state->vs_3v = 0;
  94         state->detect = 0;
  95
  96         if (sock == 0) {
  97                 if (inserted0) {
  98                         switch (vs0) {
  99                                 case 0:
 100                                 case 2:
 101                                         state->vs_3v=1;
 102                                         break;
 103                                 case 3: /* 5V */
 104                                         break;
 105                                 default:
 106                                         /* return without setting 'detect' */
 107                                         printk(KERN_ERR "pb1x00 bad VS (%d)\n",
 108                                                         vs0);
 109                                         return 0;
 110                         }
 111                         state->detect = 1;
 112                 }
 113         }
 114         else  {
 115                 if (inserted1) {
 116                         switch (vs1) {
 117                                 case 0:
 118                                 case 2:
 119                                         state->vs_3v=1;
 120                                         break;
 121                                 case 3: /* 5V */
 122                                         break;
 123                                 default:
 124                                         /* return without setting 'detect' */
 125                                         printk(KERN_ERR "pb1x00 bad VS (%d)\n",
 126                                                         vs1);
 127                                         return 0;
 128                         }
 129                         state->detect = 1;
 130                 }
 131         }
 132
 133         if (state->detect) {
 134                 state->ready = 1;
 135         }
 136
 137         state->bvd1=1;
 138         state->bvd2=1;
 139         state->wrprot=0;
 140         return 1;
 141 }
 142
 143
 144 static int pb1x00_pcmcia_get_irq_info(struct pcmcia_irq_info *info)
 145 {
 146
 147         if(info->sock > PCMCIA_MAX_SOCK) return -1;
 148
 149         /*
 150          * Even in the case of the Pb1000, both sockets are connected
 151          * to the same irq line.
 152          */
 153         info->irq = PCMCIA_IRQ;
 154
 155         return 0;
 156 }
 157
 158
 159 static int
 160 pb1x00_pcmcia_configure_socket(const struct pcmcia_configure *configure)
 161 {
 162         u16 pcr;
 163
 164         if(configure->sock > PCMCIA_MAX_SOCK) return -1;
 165
 166         pcr = au_readl(PB1000_PCR);
 167
 168         if (configure->sock == 0) {
 169                 pcr &= ~(PCR_SLOT_0_VCC0 | PCR_SLOT_0_VCC1 |
 170                                 PCR_SLOT_0_VPP0 | PCR_SLOT_0_VPP1);
 171         }
 172         else  {
 173                 pcr &= ~(PCR_SLOT_1_VCC0 | PCR_SLOT_1_VCC1 |
 174                                 PCR_SLOT_1_VPP0 | PCR_SLOT_1_VPP1);
 175         }
 176
 177         pcr &= ~PCR_SLOT_0_RST;
 178         debug("Vcc %dV Vpp %dV, pcr %x\n",
 179                         configure->vcc, configure->vpp, pcr);
 180         switch(configure->vcc){
 181                 case 0:  /* Vcc 0 */
 182                         switch(configure->vpp) {
 183                                 case 0:
 184                                         pcr |= SET_VCC_VPP(VCC_HIZ,VPP_GND,
 185                                                         configure->sock);
 186                                         break;
 187                                 case 12:
 188                                         pcr |= SET_VCC_VPP(VCC_HIZ,VPP_12V,
 189                                                         configure->sock);
 190                                         break;
 191                                 case 50:
 192                                         pcr |= SET_VCC_VPP(VCC_HIZ,VPP_5V,
 193                                                         configure->sock);
 194                                         break;
 195                                 case 33:
 196                                         pcr |= SET_VCC_VPP(VCC_HIZ,VPP_3V,
 197                                                         configure->sock);
 198                                         break;
 199                                 default:
 200                                         pcr |= SET_VCC_VPP(VCC_HIZ,VPP_HIZ,
 201                                                         configure->sock);
 202                                         printk("%s: bad Vcc/Vpp (%d:%d)\n",
 203                                                         __func__,
 204                                                         configure->vcc,
 205                                                         configure->vpp);
 206                                         break;
 207                         }
 208                         break;
 209                 case 50: /* Vcc 5V */
 210                         switch(configure->vpp) {
 211                                 case 0:
 212                                         pcr |= SET_VCC_VPP(VCC_5V,VPP_GND,
 213                                                         configure->sock);
 214                                         break;
 215                                 case 50:
 216                                         pcr |= SET_VCC_VPP(VCC_5V,VPP_5V,
 217                                                         configure->sock);
 218                                         break;
 219                                 case 12:
 220                                         pcr |= SET_VCC_VPP(VCC_5V,VPP_12V,
 221                                                         configure->sock);
 222                                         break;
 223                                 case 33:
 224                                         pcr |= SET_VCC_VPP(VCC_5V,VPP_3V,
 225                                                         configure->sock);
 226                                         break;
 227                                 default:
 228                                         pcr |= SET_VCC_VPP(VCC_HIZ,VPP_HIZ,
 229                                                         configure->sock);
 230                                         printk("%s: bad Vcc/Vpp (%d:%d)\n",
 231                                                         __func__,
 232                                                         configure->vcc,
 233                                                         configure->vpp);
 234                                         break;
 235                         }
 236                         break;
 237                 case 33: /* Vcc 3.3V */
 238                         switch(configure->vpp) {
 239                                 case 0:
 240                                         pcr |= SET_VCC_VPP(VCC_3V,VPP_GND,
 241                                                         configure->sock);
 242                                         break;
 243                                 case 50:
 244                                         pcr |= SET_VCC_VPP(VCC_3V,VPP_5V,
 245                                                         configure->sock);
 246                                         break;
 247                                 case 12:
 248                                         pcr |= SET_VCC_VPP(VCC_3V,VPP_12V,
 249                                                         configure->sock);
 250                                         break;
 251                                 case 33:
 252                                         pcr |= SET_VCC_VPP(VCC_3V,VPP_3V,
 253                                                         configure->sock);
 254                                         break;
 255                                 default:
 256                                         pcr |= SET_VCC_VPP(VCC_HIZ,VPP_HIZ,
 257                                                         configure->sock);
 258                                         printk("%s: bad Vcc/Vpp (%d:%d)\n",
 259                                                         __func__,
 260                                                         configure->vcc,
 261                                                         configure->vpp);
 262                                         break;
 263                         }
 264                         break;
 265                 default: /* what's this ? */
 266                         pcr |= SET_VCC_VPP(VCC_HIZ,VPP_HIZ,configure->sock);
 267                         printk(KERN_ERR "%s: bad Vcc %d\n",
 268                                         __func__, configure->vcc);
 269                         break;
 270         }
 271
 272         if (configure->sock == 0) {
 273         pcr &= ~(PCR_SLOT_0_RST);
 274                 if (configure->reset)
 275                 pcr |= PCR_SLOT_0_RST;
 276         }
 277         else {
 278                 pcr &= ~(PCR_SLOT_1_RST);
 279                 if (configure->reset)
 280                         pcr |= PCR_SLOT_1_RST;
 281         }
 282         au_writel(pcr, PB1000_PCR);
 283         au_sync_delay(300);
 284
 285         return 0;
 286 }
 287
 288
 289 struct pcmcia_low_level pb1x00_pcmcia_ops = {
 290         pb1x00_pcmcia_init,
 291         pb1x00_pcmcia_shutdown,
 292         pb1x00_pcmcia_socket_state,
 293         pb1x00_pcmcia_get_irq_info,
 294         pb1x00_pcmcia_configure_socket
 295 };