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/config.h>
  25 #include <linux/module.h>
  26 #include <linux/init.h>
  27 #include <linux/delay.h>
  28 #include <linux/ioport.h>
  29 #include <linux/kernel.h>
  30 #include <linux/tqueue.h>
  31 #include <linux/timer.h>
  32 #include <linux/mm.h>
  33 #include <linux/proc_fs.h>
  34 #include <linux/types.h>
  35
  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 AU1500_GPIO_203
  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(PCMCIA_BOARD_REG) & ~0xf; /* turn off power */
  86         pcr &= ~(PC_DEASSERT_RST | PC_DRV_EN);
  87         au_writew(pcr, PCMCIA_BOARD_REG);
  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(PCMCIA_BOARD_REG) & ~0xf; /* turn off power */
 106         pcr &= ~(PC_DEASSERT_RST | PC_DRV_EN);
 107         au_writew(pcr, PCMCIA_BOARD_REG);
 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(BOARD_STATUS_REG) >> 4) & 0x3;
 127 #ifdef CONFIG_MIPS_PB1500
 128         inserted0 = !((au_readl(GPIO2_PINSTATE) >> 1) & 0x1); /* gpio 201 */
 129 #else /* Pb1100 */
 130         inserted0 = !((au_readl(SYS_PINSTATERD) >> 9) & 0x1); /* gpio 9 */
 131 #endif
 132         inserted1 = 0;
 133 #endif
 134
 135         state->ready = 0;
 136         state->vs_Xv = 0;
 137         state->vs_3v = 0;
 138         state->detect = 0;
 139
 140         if (sock == 0) {
 141                 if (inserted0) {
 142                         switch (vs0) {
 143                                 case 0:
 144                                 case 2:
 145                                         state->vs_3v=1;
 146                                         break;
 147                                 case 3: /* 5V */
 148                                         break;
 149                                 default:
 150                                         /* return without setting 'detect' */
 151                                         printk(KERN_ERR "pb1x00 bad VS (%d)\n",
 152                                                         vs0);
 153                                         return 0;
 154                         }
 155                         state->detect = 1;
 156                 }
 157         }
 158         else  {
 159                 if (inserted1) {
 160                         switch (vs1) {
 161                                 case 0:
 162                                 case 2:
 163                                         state->vs_3v=1;
 164                                         break;
 165                                 case 3: /* 5V */
 166                                         break;
 167                                 default:
 168                                         /* return without setting 'detect' */
 169                                         printk(KERN_ERR "pb1x00 bad VS (%d)\n",
 170                                                         vs1);
 171                                         return 0;
 172                         }
 173                         state->detect = 1;
 174                 }
 175         }
 176
 177         if (state->detect) {
 178                 state->ready = 1;
 179         }
 180
 181         state->bvd1=1;
 182         state->bvd2=1;
 183         state->wrprot=0;
 184         return 1;
 185 }
 186
 187
 188 static int pb1x00_pcmcia_get_irq_info(struct pcmcia_irq_info *info)
 189 {
 190
 191         if(info->sock > PCMCIA_MAX_SOCK) return -1;
 192
 193         /*
 194          * Even in the case of the Pb1000, both sockets are connected
 195          * to the same irq line.
 196          */
 197         info->irq = PCMCIA_IRQ;
 198
 199         return 0;
 200 }
 201
 202
 203 static int
 204 pb1x00_pcmcia_configure_socket(const struct pcmcia_configure *configure)
 205 {
 206         u16 pcr;
 207
 208         if(configure->sock > PCMCIA_MAX_SOCK) return -1;
 209
 210 #ifdef CONFIG_MIPS_PB1000
 211         pcr = au_readl(PB1000_PCR);
 212
 213         if (configure->sock == 0) {
 214                 pcr &= ~(PCR_SLOT_0_VCC0 | PCR_SLOT_0_VCC1 |
 215                                 PCR_SLOT_0_VPP0 | PCR_SLOT_0_VPP1);
 216         }
 217         else  {
 218                 pcr &= ~(PCR_SLOT_1_VCC0 | PCR_SLOT_1_VCC1 |
 219                                 PCR_SLOT_1_VPP0 | PCR_SLOT_1_VPP1);
 220         }
 221
 222         pcr &= ~PCR_SLOT_0_RST;
 223         debug("Vcc %dV Vpp %dV, pcr %x\n",
 224                         configure->vcc, configure->vpp, pcr);
 225         switch(configure->vcc){
 226                 case 0:  /* Vcc 0 */
 227                         switch(configure->vpp) {
 228                                 case 0:
 229                                         pcr |= SET_VCC_VPP(VCC_HIZ,VPP_GND,
 230                                                         configure->sock);
 231                                         break;
 232                                 case 12:
 233                                         pcr |= SET_VCC_VPP(VCC_HIZ,VPP_12V,
 234                                                         configure->sock);
 235                                         break;
 236                                 case 50:
 237                                         pcr |= SET_VCC_VPP(VCC_HIZ,VPP_5V,
 238                                                         configure->sock);
 239                                         break;
 240                                 case 33:
 241                                         pcr |= SET_VCC_VPP(VCC_HIZ,VPP_3V,
 242                                                         configure->sock);
 243                                         break;
 244                                 default:
 245                                         pcr |= SET_VCC_VPP(VCC_HIZ,VPP_HIZ,
 246                                                         configure->sock);
 247                                         printk("%s: bad Vcc/Vpp (%d:%d)\n",
 248                                                         __FUNCTION__,
 249                                                         configure->vcc,
 250                                                         configure->vpp);
 251                                         break;
 252                         }
 253                         break;
 254                 case 50: /* Vcc 5V */
 255                         switch(configure->vpp) {
 256                                 case 0:
 257                                         pcr |= SET_VCC_VPP(VCC_5V,VPP_GND,
 258                                                         configure->sock);
 259                                         break;
 260                                 case 50:
 261                                         pcr |= SET_VCC_VPP(VCC_5V,VPP_5V,
 262                                                         configure->sock);
 263                                         break;
 264                                 case 12:
 265                                         pcr |= SET_VCC_VPP(VCC_5V,VPP_12V,
 266                                                         configure->sock);
 267                                         break;
 268                                 case 33:
 269                                         pcr |= SET_VCC_VPP(VCC_5V,VPP_3V,
 270                                                         configure->sock);
 271                                         break;
 272                                 default:
 273                                         pcr |= SET_VCC_VPP(VCC_HIZ,VPP_HIZ,
 274                                                         configure->sock);
 275                                         printk("%s: bad Vcc/Vpp (%d:%d)\n",
 276                                                         __FUNCTION__,
 277                                                         configure->vcc,
 278                                                         configure->vpp);
 279                                         break;
 280                         }
 281                         break;
 282                 case 33: /* Vcc 3.3V */
 283                         switch(configure->vpp) {
 284                                 case 0:
 285                                         pcr |= SET_VCC_VPP(VCC_3V,VPP_GND,
 286                                                         configure->sock);
 287                                         break;
 288                                 case 50:
 289                                         pcr |= SET_VCC_VPP(VCC_3V,VPP_5V,
 290                                                         configure->sock);
 291                                         break;
 292                                 case 12:
 293                                         pcr |= SET_VCC_VPP(VCC_3V,VPP_12V,
 294                                                         configure->sock);
 295                                         break;
 296                                 case 33:
 297                                         pcr |= SET_VCC_VPP(VCC_3V,VPP_3V,
 298                                                         configure->sock);
 299                                         break;
 300                                 default:
 301                                         pcr |= SET_VCC_VPP(VCC_HIZ,VPP_HIZ,
 302                                                         configure->sock);
 303                                         printk("%s: bad Vcc/Vpp (%d:%d)\n",
 304                                                         __FUNCTION__,
 305                                                         configure->vcc,
 306                                                         configure->vpp);
 307                                         break;
 308                         }
 309                         break;
 310                 default: /* what's this ? */
 311                         pcr |= SET_VCC_VPP(VCC_HIZ,VPP_HIZ,configure->sock);
 312                         printk(KERN_ERR "%s: bad Vcc %d\n",
 313                                         __FUNCTION__, configure->vcc);
 314                         break;
 315         }
 316
 317         if (configure->sock == 0) {
 318         pcr &= ~(PCR_SLOT_0_RST);
 319                 if (configure->reset)
 320                 pcr |= PCR_SLOT_0_RST;
 321         }
 322         else {
 323                 pcr &= ~(PCR_SLOT_1_RST);
 324                 if (configure->reset)
 325                         pcr |= PCR_SLOT_1_RST;
 326         }
 327         au_writel(pcr, PB1000_PCR);
 328         au_sync_delay(300);
 329
 330 #else
 331
 332         pcr = au_readw(PCMCIA_BOARD_REG) & ~0xf;
 333
 334         debug("Vcc %dV Vpp %dV, pcr %x, reset %d\n",
 335                         configure->vcc, configure->vpp, pcr, configure->reset);
 336
 337
 338         switch(configure->vcc){
 339                 case 0:  /* Vcc 0 */
 340                         pcr |= SET_VCC_VPP(0,0);
 341                         break;
 342                 case 50: /* Vcc 5V */
 343                         switch(configure->vpp) {
 344                                 case 0:
 345                                         pcr |= SET_VCC_VPP(2,0);
 346                                         break;
 347                                 case 50:
 348                                         pcr |= SET_VCC_VPP(2,1);
 349                                         break;
 350                                 case 12:
 351                                         pcr |= SET_VCC_VPP(2,2);
 352                                         break;
 353                                 case 33:
 354                                 default:
 355                                         pcr |= SET_VCC_VPP(0,0);
 356                                         printk("%s: bad Vcc/Vpp (%d:%d)\n",
 357                                                         __FUNCTION__,
 358                                                         configure->vcc,
 359                                                         configure->vpp);
 360                                         break;
 361                         }
 362                         break;
 363                 case 33: /* Vcc 3.3V */
 364                         switch(configure->vpp) {
 365                                 case 0:
 366                                         pcr |= SET_VCC_VPP(1,0);
 367                                         break;
 368                                 case 12:
 369                                         pcr |= SET_VCC_VPP(1,2);
 370                                         break;
 371                                 case 33:
 372                                         pcr |= SET_VCC_VPP(1,1);
 373                                         break;
 374                                 case 50:
 375                                 default:
 376                                         pcr |= SET_VCC_VPP(0,0);
 377                                         printk("%s: bad Vcc/Vpp (%d:%d)\n",
 378                                                         __FUNCTION__,
 379                                                         configure->vcc,
 380                                                         configure->vpp);
 381                                         break;
 382                         }
 383                         break;
 384                 default: /* what's this ? */
 385                         pcr |= SET_VCC_VPP(0,0);
 386                         printk(KERN_ERR "%s: bad Vcc %d\n",
 387                                         __FUNCTION__, configure->vcc);
 388                         break;
 389         }
 390
 391         au_writew(pcr, PCMCIA_BOARD_REG);
 392         au_sync_delay(300);
 393
 394         if (!configure->reset) {
 395                 pcr |= PC_DRV_EN;
 396                 au_writew(pcr, PCMCIA_BOARD_REG);
 397                 au_sync_delay(100);
 398                 pcr |= PC_DEASSERT_RST;
 399                 au_writew(pcr, PCMCIA_BOARD_REG);
 400                 au_sync_delay(100);
 401         }
 402         else {
 403                 pcr &= ~(PC_DEASSERT_RST | PC_DRV_EN);
 404                 au_writew(pcr, PCMCIA_BOARD_REG);
 405                 au_sync_delay(100);
 406         }
 407 #endif
 408         return 0;
 409 }
 410
 411
 412 struct pcmcia_low_level pb1x00_pcmcia_ops = {
 413         pb1x00_pcmcia_init,
 414         pb1x00_pcmcia_shutdown,
 415         pb1x00_pcmcia_socket_state,
 416         pb1x00_pcmcia_get_irq_info,
 417         pb1x00_pcmcia_configure_socket
 418 };