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_types.h>
  35 #include <pcmcia/cs.h>
  36 #include <pcmcia/ss.h>
  37 #include <pcmcia/cistpl.h>
  38 #include <pcmcia/bus_ops.h>
  39
  40 #include <asm/io.h>
  41 #include <asm/irq.h>
  42 #include <asm/system.h>
  43
  44 #include <asm/au1000.h>
  45 #include <asm/au1000_pcmcia.h>
  46
  47 #define debug(fmt, arg...) do { } while (0)
  48
  49 #include <asm/pb1000.h>
  50 #define PCMCIA_IRQ AU1000_GPIO_15
  51
  52 static int pb1x00_pcmcia_init(struct pcmcia_init *init)
  53 {
  54         u16 pcr;
  55         pcr = PCR_SLOT_0_RST | PCR_SLOT_1_RST;
  56
  57         au_writel(0x8000, PB1000_MDR); /* clear pcmcia interrupt */
  58         au_sync_delay(100);
  59         au_writel(0x4000, PB1000_MDR); /* enable pcmcia interrupt */
  60         au_sync();
  61
  62         pcr |= SET_VCC_VPP(VCC_HIZ,VPP_HIZ,0);
  63         pcr |= SET_VCC_VPP(VCC_HIZ,VPP_HIZ,1);
  64         au_writel(pcr, PB1000_PCR);
  65         au_sync_delay(20);
  66
  67         return PCMCIA_NUM_SOCKS;
  68 }
  69
  70 static int pb1x00_pcmcia_shutdown(void)
  71 {
  72         u16 pcr;
  73         pcr = PCR_SLOT_0_RST | PCR_SLOT_1_RST;
  74         pcr |= SET_VCC_VPP(VCC_HIZ,VPP_HIZ,0);
  75         pcr |= SET_VCC_VPP(VCC_HIZ,VPP_HIZ,1);
  76         au_writel(pcr, PB1000_PCR);
  77         au_sync_delay(20);
  78         return 0;
  79 }
  80
  81 static int
  82 pb1x00_pcmcia_socket_state(unsigned sock, struct pcmcia_state *state)
  83 {
  84         u32 inserted0, inserted1;
  85         u16 vs0, vs1;
  86
  87         vs0 = vs1 = (u16)au_readl(PB1000_ACR1);
  88         inserted0 = !(vs0 & (ACR1_SLOT_0_CD1 | ACR1_SLOT_0_CD2));
  89         inserted1 = !(vs1 & (ACR1_SLOT_1_CD1 | ACR1_SLOT_1_CD2));
  90         vs0 = (vs0 >> 4) & 0x3;
  91         vs1 = (vs1 >> 12) & 0x3;
  92
  93         state->ready = 0;
  94         state->vs_Xv = 0;
  95         state->vs_3v = 0;
  96         state->detect = 0;
  97
  98         if (sock == 0) {
  99                 if (inserted0) {
 100                         switch (vs0) {
 101                                 case 0:
 102                                 case 2:
 103                                         state->vs_3v=1;
 104                                         break;
 105                                 case 3: /* 5V */
 106                                         break;
 107                                 default:
 108                                         /* return without setting 'detect' */
 109                                         printk(KERN_ERR "pb1x00 bad VS (%d)\n",
 110                                                         vs0);
 111                                         return 0;
 112                         }
 113                         state->detect = 1;
 114                 }
 115         }
 116         else  {
 117                 if (inserted1) {
 118                         switch (vs1) {
 119                                 case 0:
 120                                 case 2:
 121                                         state->vs_3v=1;
 122                                         break;
 123                                 case 3: /* 5V */
 124                                         break;
 125                                 default:
 126                                         /* return without setting 'detect' */
 127                                         printk(KERN_ERR "pb1x00 bad VS (%d)\n",
 128                                                         vs1);
 129                                         return 0;
 130                         }
 131                         state->detect = 1;
 132                 }
 133         }
 134
 135         if (state->detect) {
 136                 state->ready = 1;
 137         }
 138
 139         state->bvd1=1;
 140         state->bvd2=1;
 141         state->wrprot=0;
 142         return 1;
 143 }
 144
 145
 146 static int pb1x00_pcmcia_get_irq_info(struct pcmcia_irq_info *info)
 147 {
 148
 149         if(info->sock > PCMCIA_MAX_SOCK) return -1;
 150
 151         /*
 152          * Even in the case of the Pb1000, both sockets are connected
 153          * to the same irq line.
 154          */
 155         info->irq = PCMCIA_IRQ;
 156
 157         return 0;
 158 }
 159
 160
 161 static int
 162 pb1x00_pcmcia_configure_socket(const struct pcmcia_configure *configure)
 163 {
 164         u16 pcr;
 165
 166         if(configure->sock > PCMCIA_MAX_SOCK) return -1;
 167
 168         pcr = au_readl(PB1000_PCR);
 169
 170         if (configure->sock == 0) {
 171                 pcr &= ~(PCR_SLOT_0_VCC0 | PCR_SLOT_0_VCC1 |
 172                                 PCR_SLOT_0_VPP0 | PCR_SLOT_0_VPP1);
 173         }
 174         else  {
 175                 pcr &= ~(PCR_SLOT_1_VCC0 | PCR_SLOT_1_VCC1 |
 176                                 PCR_SLOT_1_VPP0 | PCR_SLOT_1_VPP1);
 177         }
 178
 179         pcr &= ~PCR_SLOT_0_RST;
 180         debug("Vcc %dV Vpp %dV, pcr %x\n",
 181                         configure->vcc, configure->vpp, pcr);
 182         switch(configure->vcc){
 183                 case 0:  /* Vcc 0 */
 184                         switch(configure->vpp) {
 185                                 case 0:
 186                                         pcr |= SET_VCC_VPP(VCC_HIZ,VPP_GND,
 187                                                         configure->sock);
 188                                         break;
 189                                 case 12:
 190                                         pcr |= SET_VCC_VPP(VCC_HIZ,VPP_12V,
 191                                                         configure->sock);
 192                                         break;
 193                                 case 50:
 194                                         pcr |= SET_VCC_VPP(VCC_HIZ,VPP_5V,
 195                                                         configure->sock);
 196                                         break;
 197                                 case 33:
 198                                         pcr |= SET_VCC_VPP(VCC_HIZ,VPP_3V,
 199                                                         configure->sock);
 200                                         break;
 201                                 default:
 202                                         pcr |= SET_VCC_VPP(VCC_HIZ,VPP_HIZ,
 203                                                         configure->sock);
 204                                         printk("%s: bad Vcc/Vpp (%d:%d)\n",
 205                                                         __func__,
 206                                                         configure->vcc,
 207                                                         configure->vpp);
 208                                         break;
 209                         }
 210                         break;
 211                 case 50: /* Vcc 5V */
 212                         switch(configure->vpp) {
 213                                 case 0:
 214                                         pcr |= SET_VCC_VPP(VCC_5V,VPP_GND,
 215                                                         configure->sock);
 216                                         break;
 217                                 case 50:
 218                                         pcr |= SET_VCC_VPP(VCC_5V,VPP_5V,
 219                                                         configure->sock);
 220                                         break;
 221                                 case 12:
 222                                         pcr |= SET_VCC_VPP(VCC_5V,VPP_12V,
 223                                                         configure->sock);
 224                                         break;
 225                                 case 33:
 226                                         pcr |= SET_VCC_VPP(VCC_5V,VPP_3V,
 227                                                         configure->sock);
 228                                         break;
 229                                 default:
 230                                         pcr |= SET_VCC_VPP(VCC_HIZ,VPP_HIZ,
 231                                                         configure->sock);
 232                                         printk("%s: bad Vcc/Vpp (%d:%d)\n",
 233                                                         __func__,
 234                                                         configure->vcc,
 235                                                         configure->vpp);
 236                                         break;
 237                         }
 238                         break;
 239                 case 33: /* Vcc 3.3V */
 240                         switch(configure->vpp) {
 241                                 case 0:
 242                                         pcr |= SET_VCC_VPP(VCC_3V,VPP_GND,
 243                                                         configure->sock);
 244                                         break;
 245                                 case 50:
 246                                         pcr |= SET_VCC_VPP(VCC_3V,VPP_5V,
 247                                                         configure->sock);
 248                                         break;
 249                                 case 12:
 250                                         pcr |= SET_VCC_VPP(VCC_3V,VPP_12V,
 251                                                         configure->sock);
 252                                         break;
 253                                 case 33:
 254                                         pcr |= SET_VCC_VPP(VCC_3V,VPP_3V,
 255                                                         configure->sock);
 256                                         break;
 257                                 default:
 258                                         pcr |= SET_VCC_VPP(VCC_HIZ,VPP_HIZ,
 259                                                         configure->sock);
 260                                         printk("%s: bad Vcc/Vpp (%d:%d)\n",
 261                                                         __func__,
 262                                                         configure->vcc,
 263                                                         configure->vpp);
 264                                         break;
 265                         }
 266                         break;
 267                 default: /* what's this ? */
 268                         pcr |= SET_VCC_VPP(VCC_HIZ,VPP_HIZ,configure->sock);
 269                         printk(KERN_ERR "%s: bad Vcc %d\n",
 270                                         __func__, configure->vcc);
 271                         break;
 272         }
 273
 274         if (configure->sock == 0) {
 275         pcr &= ~(PCR_SLOT_0_RST);
 276                 if (configure->reset)
 277                 pcr |= PCR_SLOT_0_RST;
 278         }
 279         else {
 280                 pcr &= ~(PCR_SLOT_1_RST);
 281                 if (configure->reset)
 282                         pcr |= PCR_SLOT_1_RST;
 283         }
 284         au_writel(pcr, PB1000_PCR);
 285         au_sync_delay(300);
 286
 287         return 0;
 288 }
 289
 290
 291 struct pcmcia_low_level pb1x00_pcmcia_ops = {
 292         pb1x00_pcmcia_init,
 293         pb1x00_pcmcia_shutdown,
 294         pb1x00_pcmcia_socket_state,
 295         pb1x00_pcmcia_get_irq_info,
 296         pb1x00_pcmcia_configure_socket
 297 };