drivers/pcmcia/au1000_pb1x00.c

   1 /*
   2  *
   3  * Alchemy Semi Pb1x00 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/tqueue.h>
  30 #include <linux/timer.h>
  31 #include <linux/mm.h>
  32 #include <linux/proc_fs.h>
  33 #include <linux/types.h>
  34
  35 #include <pcmcia/version.h>
  36 #include <pcmcia/cs_types.h>
  37 #include <pcmcia/cs.h>
  38 #include <pcmcia/ss.h>
  39 #include <pcmcia/bulkmem.h>
  40 #include <pcmcia/cistpl.h>
  41 #include <pcmcia/bus_ops.h>
  42 #include "cs_internal.h"
  43
  44 #include <asm/io.h>
  45 #include <asm/irq.h>
  46 #include <asm/system.h>
  47
  48 #include <asm/au1000.h>
  49 #include <asm/au1000_pcmcia.h>
  50
  51 #define debug(fmt, arg...) do { } while (0)
  52
  53 #ifdef CONFIG_MIPS_PB1000
  54 #include <asm/pb1000.h>
  55 #define PCMCIA_IRQ AU1000_GPIO_15
  56 #elif defined (CONFIG_MIPS_PB1500)
  57 #include <asm/pb1500.h>
  58 #define PCMCIA_IRQ AU1000_GPIO_11   /* fixme */
  59 #elif defined (CONFIG_MIPS_PB1100)
  60 #include <asm/pb1100.h>
  61 #define PCMCIA_IRQ AU1000_GPIO_11
  62 #endif
  63
  64 static int pb1x00_pcmcia_init(struct pcmcia_init *init)
  65 {
  66 #ifdef CONFIG_MIPS_PB1000
  67         u16 pcr;
  68         pcr = PCR_SLOT_0_RST | PCR_SLOT_1_RST;
  69
  70         au_writel(0x8000, PB1000_MDR); /* clear pcmcia interrupt */
  71         au_sync_delay(100);
  72         au_writel(0x4000, PB1000_MDR); /* enable pcmcia interrupt */
  73         au_sync();
  74
  75         pcr |= SET_VCC_VPP(VCC_HIZ,VPP_HIZ,0);
  76         pcr |= SET_VCC_VPP(VCC_HIZ,VPP_HIZ,1);
  77         au_writel(pcr, PB1000_PCR);
  78         au_sync_delay(20);
  79
  80         return PCMCIA_NUM_SOCKS;
  81
  82 #else /* fixme -- take care of the Pb1500 at some point */
  83
  84         u16 pcr;
  85         pcr = au_readw(PB1100_MEM_PCMCIA) & ~0xf; /* turn off power */
  86         pcr &= ~(PB1100_PC_DEASSERT_RST | PB1100_PC_DRV_EN);
  87         au_writew(pcr, PB1100_MEM_PCMCIA);
  88         au_sync_delay(500);
  89         return PCMCIA_NUM_SOCKS;
  90 #endif
  91 }
  92
  93 static int pb1x00_pcmcia_shutdown(void)
  94 {
  95 #ifdef CONFIG_MIPS_PB1000
  96         u16 pcr;
  97         pcr = PCR_SLOT_0_RST | PCR_SLOT_1_RST;
  98         pcr |= SET_VCC_VPP(VCC_HIZ,VPP_HIZ,0);
  99         pcr |= SET_VCC_VPP(VCC_HIZ,VPP_HIZ,1);
 100         au_writel(pcr, PB1000_PCR);
 101         au_sync_delay(20);
 102         return 0;
 103 #else
 104         u16 pcr;
 105         pcr = au_readw(PB1100_MEM_PCMCIA) & ~0xf; /* turn off power */
 106         pcr &= ~(PB1100_PC_DEASSERT_RST | PB1100_PC_DRV_EN);
 107         au_writew(pcr, PB1100_MEM_PCMCIA);
 108         au_sync_delay(2);
 109         return 0;
 110 #endif
 111 }
 112
 113 static int
 114 pb1x00_pcmcia_socket_state(unsigned sock, struct pcmcia_state *state)
 115 {
 116         u32 inserted0, inserted1;
 117         u16 vs0, vs1;
 118
 119 #ifdef CONFIG_MIPS_PB1000
 120         vs0 = vs1 = (u16)au_readl(PB1000_ACR1);
 121         inserted0 = !(vs0 & (ACR1_SLOT_0_CD1 | ACR1_SLOT_0_CD2));
 122         inserted1 = !(vs1 & (ACR1_SLOT_1_CD1 | ACR1_SLOT_1_CD2));
 123         vs0 = (vs0 >> 4) & 0x3;
 124         vs1 = (vs1 >> 12) & 0x3;
 125 #else
 126         vs0 = (au_readw(PB1100_BOARD_STATUS) >> 4) & 0x3;
 127         inserted0 = !((au_readl(SYS_PINSTATERD) >> 9) & 0x1); /* gpio 9 */
 128 #endif
 129
 130         state->ready = 0;
 131         state->vs_Xv = 0;
 132         state->vs_3v = 0;
 133         state->detect = 0;
 134
 135         if (sock == 0) {
 136                 if (inserted0) {
 137                         switch (vs0) {
 138                                 case 0:
 139                                 case 2:
 140                                         state->vs_3v=1;
 141                                         break;
 142                                 case 3: /* 5V */
 143                                         break;
 144                                 default:
 145                                         /* return without setting 'detect' */
 146                                         printk(KERN_ERR "pb1x00 bad VS (%d)\n",
 147                                                         vs0);
 148                                         return;
 149                         }
 150                         state->detect = 1;
 151                 }
 152         }
 153         else  {
 154                 if (inserted1) {
 155                         switch (vs1) {
 156                                 case 0:
 157                                 case 2:
 158                                         state->vs_3v=1;
 159                                         break;
 160                                 case 3: /* 5V */
 161                                         break;
 162                                 default:
 163                                         /* return without setting 'detect' */
 164                                         printk(KERN_ERR "pb1x00 bad VS (%d)\n",
 165                                                         vs1);
 166                                         return;
 167                         }
 168                         state->detect = 1;
 169                 }
 170         }
 171
 172         if (state->detect) {
 173                 state->ready = 1;
 174         }
 175
 176         state->bvd1=1;
 177         state->bvd2=1;
 178         state->wrprot=0;
 179         return 1;
 180 }
 181
 182
 183 static int pb1x00_pcmcia_get_irq_info(struct pcmcia_irq_info *info)
 184 {
 185
 186         if(info->sock > PCMCIA_MAX_SOCK) return -1;
 187
 188         /*
 189          * Even in the case of the Pb1000, both sockets are connected
 190          * to the same irq line.
 191          */
 192         info->irq = PCMCIA_IRQ;
 193
 194         return 0;
 195 }
 196
 197
 198 static int
 199 pb1x00_pcmcia_configure_socket(const struct pcmcia_configure *configure)
 200 {
 201         u16 pcr;
 202
 203         if(configure->sock > PCMCIA_MAX_SOCK) return -1;
 204
 205 #ifdef CONFIG_MIPS_PB1000
 206         pcr = au_readl(PB1000_PCR);
 207
 208         if (configure->sock == 0) {
 209                 pcr &= ~(PCR_SLOT_0_VCC0 | PCR_SLOT_0_VCC1 |
 210                                 PCR_SLOT_0_VPP0 | PCR_SLOT_0_VPP1);
 211         }
 212         else  {
 213                 pcr &= ~(PCR_SLOT_1_VCC0 | PCR_SLOT_1_VCC1 |
 214                                 PCR_SLOT_1_VPP0 | PCR_SLOT_1_VPP1);
 215         }
 216
 217         pcr &= ~PCR_SLOT_0_RST;
 218         debug("Vcc %dV Vpp %dV, pcr %x\n",
 219                         configure->vcc, configure->vpp, pcr);
 220         switch(configure->vcc){
 221                 case 0:  /* Vcc 0 */
 222                         switch(configure->vpp) {
 223                                 case 0:
 224                                         pcr |= SET_VCC_VPP(VCC_HIZ,VPP_GND,
 225                                                         configure->sock);
 226                                         break;
 227                                 case 12:
 228                                         pcr |= SET_VCC_VPP(VCC_HIZ,VPP_12V,
 229                                                         configure->sock);
 230                                         break;
 231                                 case 50:
 232                                         pcr |= SET_VCC_VPP(VCC_HIZ,VPP_5V,
 233                                                         configure->sock);
 234                                         break;
 235                                 case 33:
 236                                         pcr |= SET_VCC_VPP(VCC_HIZ,VPP_3V,
 237                                                         configure->sock);
 238                                         break;
 239                                 default:
 240                                         pcr |= SET_VCC_VPP(VCC_HIZ,VPP_HIZ,
 241                                                         configure->sock);
 242                                         printk("%s: bad Vcc/Vpp (%d:%d)\n",
 243                                                         __FUNCTION__,
 244                                                         configure->vcc,
 245                                                         configure->vpp);
 246                                         break;
 247                         }
 248                         break;
 249                 case 50: /* Vcc 5V */
 250                         switch(configure->vpp) {
 251                                 case 0:
 252                                         pcr |= SET_VCC_VPP(VCC_5V,VPP_GND,
 253                                                         configure->sock);
 254                                         break;
 255                                 case 50:
 256                                         pcr |= SET_VCC_VPP(VCC_5V,VPP_5V,
 257                                                         configure->sock);
 258                                         break;
 259                                 case 12:
 260                                         pcr |= SET_VCC_VPP(VCC_5V,VPP_12V,
 261                                                         configure->sock);
 262                                         break;
 263                                 case 33:
 264                                         pcr |= SET_VCC_VPP(VCC_5V,VPP_3V,
 265                                                         configure->sock);
 266                                         break;
 267                                 default:
 268                                         pcr |= SET_VCC_VPP(VCC_HIZ,VPP_HIZ,
 269                                                         configure->sock);
 270                                         printk("%s: bad Vcc/Vpp (%d:%d)\n",
 271                                                         __FUNCTION__,
 272                                                         configure->vcc,
 273                                                         configure->vpp);
 274                                         break;
 275                         }
 276                         break;
 277                 case 33: /* Vcc 3.3V */
 278                         switch(configure->vpp) {
 279                                 case 0:
 280                                         pcr |= SET_VCC_VPP(VCC_3V,VPP_GND,
 281                                                         configure->sock);
 282                                         break;
 283                                 case 50:
 284                                         pcr |= SET_VCC_VPP(VCC_3V,VPP_5V,
 285                                                         configure->sock);
 286                                         break;
 287                                 case 12:
 288                                         pcr |= SET_VCC_VPP(VCC_3V,VPP_12V,
 289                                                         configure->sock);
 290                                         break;
 291                                 case 33:
 292                                         pcr |= SET_VCC_VPP(VCC_3V,VPP_3V,
 293                                                         configure->sock);
 294                                         break;
 295                                 default:
 296                                         pcr |= SET_VCC_VPP(VCC_HIZ,VPP_HIZ,
 297                                                         configure->sock);
 298                                         printk("%s: bad Vcc/Vpp (%d:%d)\n",
 299                                                         __FUNCTION__,
 300                                                         configure->vcc,
 301                                                         configure->vpp);
 302                                         break;
 303                         }
 304                         break;
 305                 default: /* what's this ? */
 306                         pcr |= SET_VCC_VPP(VCC_HIZ,VPP_HIZ,configure->sock);
 307                         printk(KERN_ERR "%s: bad Vcc %d\n",
 308                                         __FUNCTION__, configure->vcc);
 309                         break;
 310         }
 311
 312         if (configure->sock == 0) {
 313         pcr &= ~(PCR_SLOT_0_RST);
 314                 if (configure->reset)
 315                 pcr |= PCR_SLOT_0_RST;
 316         }
 317         else {
 318                 pcr &= ~(PCR_SLOT_1_RST);
 319                 if (configure->reset)
 320                         pcr |= PCR_SLOT_1_RST;
 321         }
 322         au_writel(pcr, PB1000_PCR);
 323         au_sync_delay(300);
 324
 325 #else
 326
 327         pcr = au_readw(PB1100_MEM_PCMCIA) & ~0xf;
 328
 329         debug("Vcc %dV Vpp %dV, pcr %x, reset %d\n",
 330                         configure->vcc, configure->vpp, pcr, configure->reset);
 331
 332
 333         switch(configure->vcc){
 334                 case 0:  /* Vcc 0 */
 335                         pcr |= SET_VCC_VPP(0,0);
 336                         break;
 337                 case 50: /* Vcc 5V */
 338                         switch(configure->vpp) {
 339                                 case 0:
 340                                         pcr |= SET_VCC_VPP(2,0);
 341                                         break;
 342                                 case 50:
 343                                         pcr |= SET_VCC_VPP(2,1);
 344                                         break;
 345                                 case 12:
 346                                         pcr |= SET_VCC_VPP(2,2);
 347                                         break;
 348                                 case 33:
 349                                 default:
 350                                         pcr |= SET_VCC_VPP(0,0);
 351                                         printk("%s: bad Vcc/Vpp (%d:%d)\n",
 352                                                         __FUNCTION__,
 353                                                         configure->vcc,
 354                                                         configure->vpp);
 355                                         break;
 356                         }
 357                         break;
 358                 case 33: /* Vcc 3.3V */
 359                         switch(configure->vpp) {
 360                                 case 0:
 361                                         pcr |= SET_VCC_VPP(1,0);
 362                                         break;
 363                                 case 12:
 364                                         pcr |= SET_VCC_VPP(1,2);
 365                                         break;
 366                                 case 33:
 367                                         pcr |= SET_VCC_VPP(1,1);
 368                                         break;
 369                                 case 50:
 370                                 default:
 371                                         pcr |= SET_VCC_VPP(0,0);
 372                                         printk("%s: bad Vcc/Vpp (%d:%d)\n",
 373                                                         __FUNCTION__,
 374                                                         configure->vcc,
 375                                                         configure->vpp);
 376                                         break;
 377                         }
 378                         break;
 379                 default: /* what's this ? */
 380                         pcr |= SET_VCC_VPP(0,0);
 381                         printk(KERN_ERR "%s: bad Vcc %d\n",
 382                                         __FUNCTION__, configure->vcc);
 383                         break;
 384         }
 385
 386         au_writew(pcr, PB1100_MEM_PCMCIA);
 387         au_sync_delay(300);
 388
 389         if (!configure->reset) {
 390                 pcr |= PB1100_PC_DRV_EN;
 391                 au_writew(pcr, PB1100_MEM_PCMCIA);
 392                 au_sync_delay(100);
 393                 pcr |= PB1100_PC_DEASSERT_RST;
 394                 au_writew(pcr, PB1100_MEM_PCMCIA);
 395                 au_sync_delay(100);
 396         }
 397         else {
 398                 pcr &= ~(PB1100_PC_DEASSERT_RST | PB1100_PC_DRV_EN);
 399                 au_writew(pcr, PB1100_MEM_PCMCIA);
 400                 au_sync_delay(100);
 401         }
 402 #endif
 403         return 0;
 404 }
 405
 406 struct pcmcia_low_level pb1x00_pcmcia_ops = {
 407         pb1x00_pcmcia_init,
 408         pb1x00_pcmcia_shutdown,
 409         pb1x00_pcmcia_socket_state,
 410         pb1x00_pcmcia_get_irq_info,
 411         pb1x00_pcmcia_configure_socket
 412 };