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/cs_types.h>
  36 #include <pcmcia/cs.h>
  37 #include <pcmcia/ss.h>
  38 #include <pcmcia/cistpl.h>
  39 #include <pcmcia/bus_ops.h>
  40
  41 #include <asm/io.h>
  42 #include <asm/irq.h>
  43 #include <asm/system.h>
  44
  45 #include <asm/au1000.h>
  46 #include <asm/au1000_pcmcia.h>
  47
  48 #define debug(fmt, arg...) do { } while (0)
  49
  50 #ifdef CONFIG_MIPS_PB1000
  51 #include <asm/pb1000.h>
  52 #define PCMCIA_IRQ AU1000_GPIO_15
  53 #elif defined (CONFIG_MIPS_PB1500)
  54 #include <asm/pb1500.h>
  55 #define PCMCIA_IRQ AU1500_GPIO_203
  56 #elif defined (CONFIG_MIPS_PB1100)
  57 #include <asm/pb1100.h>
  58 #define PCMCIA_IRQ AU1000_GPIO_11
  59 #endif
  60
  61 static int pb1x00_pcmcia_init(struct pcmcia_init *init)
  62 {
  63 #ifdef CONFIG_MIPS_PB1000
  64         u16 pcr;
  65         pcr = PCR_SLOT_0_RST | PCR_SLOT_1_RST;
  66
  67         au_writel(0x8000, PB1000_MDR); /* clear pcmcia interrupt */
  68         au_sync_delay(100);
  69         au_writel(0x4000, PB1000_MDR); /* enable pcmcia interrupt */
  70         au_sync();
  71
  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
  77         return PCMCIA_NUM_SOCKS;
  78
  79 #else /* fixme -- take care of the Pb1500 at some point */
  80
  81         u16 pcr;
  82         pcr = au_readw(PCMCIA_BOARD_REG) & ~0xf; /* turn off power */
  83         pcr &= ~(PC_DEASSERT_RST | PC_DRV_EN);
  84         au_writew(pcr, PCMCIA_BOARD_REG);
  85         au_sync_delay(500);
  86         return PCMCIA_NUM_SOCKS;
  87 #endif
  88 }
  89
  90 static int pb1x00_pcmcia_shutdown(void)
  91 {
  92 #ifdef CONFIG_MIPS_PB1000
  93         u16 pcr;
  94         pcr = PCR_SLOT_0_RST | PCR_SLOT_1_RST;
  95         pcr |= SET_VCC_VPP(VCC_HIZ,VPP_HIZ,0);
  96         pcr |= SET_VCC_VPP(VCC_HIZ,VPP_HIZ,1);
  97         au_writel(pcr, PB1000_PCR);
  98         au_sync_delay(20);
  99         return 0;
 100 #else
 101         u16 pcr;
 102         pcr = au_readw(PCMCIA_BOARD_REG) & ~0xf; /* turn off power */
 103         pcr &= ~(PC_DEASSERT_RST | PC_DRV_EN);
 104         au_writew(pcr, PCMCIA_BOARD_REG);
 105         au_sync_delay(2);
 106         return 0;
 107 #endif
 108 }
 109
 110 static int
 111 pb1x00_pcmcia_socket_state(unsigned sock, struct pcmcia_state *state)
 112 {
 113         u32 inserted0, inserted1;
 114         u16 vs0, vs1;
 115
 116 #ifdef CONFIG_MIPS_PB1000
 117         vs0 = vs1 = (u16)au_readl(PB1000_ACR1);
 118         inserted0 = !(vs0 & (ACR1_SLOT_0_CD1 | ACR1_SLOT_0_CD2));
 119         inserted1 = !(vs1 & (ACR1_SLOT_1_CD1 | ACR1_SLOT_1_CD2));
 120         vs0 = (vs0 >> 4) & 0x3;
 121         vs1 = (vs1 >> 12) & 0x3;
 122 #else
 123         vs0 = (au_readw(BOARD_STATUS_REG) >> 4) & 0x3;
 124 #ifdef CONFIG_MIPS_PB1500
 125         inserted0 = !((au_readl(GPIO2_PINSTATE) >> 1) & 0x1); /* gpio 201 */
 126 #else /* Pb1100 */
 127         inserted0 = !((au_readl(SYS_PINSTATERD) >> 9) & 0x1); /* gpio 9 */
 128 #endif
 129         inserted1 = 0;
 130 #endif
 131
 132         state->ready = 0;
 133         state->vs_Xv = 0;
 134         state->vs_3v = 0;
 135         state->detect = 0;
 136
 137         if (sock == 0) {
 138                 if (inserted0) {
 139                         switch (vs0) {
 140                                 case 0:
 141                                 case 2:
 142                                         state->vs_3v=1;
 143                                         break;
 144                                 case 3: /* 5V */
 145                                         break;
 146                                 default:
 147                                         /* return without setting 'detect' */
 148                                         printk(KERN_ERR "pb1x00 bad VS (%d)\n",
 149                                                         vs0);
 150                                         return 0;
 151                         }
 152                         state->detect = 1;
 153                 }
 154         }
 155         else  {
 156                 if (inserted1) {
 157                         switch (vs1) {
 158                                 case 0:
 159                                 case 2:
 160                                         state->vs_3v=1;
 161                                         break;
 162                                 case 3: /* 5V */
 163                                         break;
 164                                 default:
 165                                         /* return without setting 'detect' */
 166                                         printk(KERN_ERR "pb1x00 bad VS (%d)\n",
 167                                                         vs1);
 168                                         return 0;
 169                         }
 170                         state->detect = 1;
 171                 }
 172         }
 173
 174         if (state->detect) {
 175                 state->ready = 1;
 176         }
 177
 178         state->bvd1=1;
 179         state->bvd2=1;
 180         state->wrprot=0;
 181         return 1;
 182 }
 183
 184
 185 static int pb1x00_pcmcia_get_irq_info(struct pcmcia_irq_info *info)
 186 {
 187
 188         if(info->sock > PCMCIA_MAX_SOCK) return -1;
 189
 190         /*
 191          * Even in the case of the Pb1000, both sockets are connected
 192          * to the same irq line.
 193          */
 194         info->irq = PCMCIA_IRQ;
 195
 196         return 0;
 197 }
 198
 199
 200 static int
 201 pb1x00_pcmcia_configure_socket(const struct pcmcia_configure *configure)
 202 {
 203         u16 pcr;
 204
 205         if(configure->sock > PCMCIA_MAX_SOCK) return -1;
 206
 207 #ifdef CONFIG_MIPS_PB1000
 208         pcr = au_readl(PB1000_PCR);
 209
 210         if (configure->sock == 0) {
 211                 pcr &= ~(PCR_SLOT_0_VCC0 | PCR_SLOT_0_VCC1 |
 212                                 PCR_SLOT_0_VPP0 | PCR_SLOT_0_VPP1);
 213         }
 214         else  {
 215                 pcr &= ~(PCR_SLOT_1_VCC0 | PCR_SLOT_1_VCC1 |
 216                                 PCR_SLOT_1_VPP0 | PCR_SLOT_1_VPP1);
 217         }
 218
 219         pcr &= ~PCR_SLOT_0_RST;
 220         debug("Vcc %dV Vpp %dV, pcr %x\n",
 221                         configure->vcc, configure->vpp, pcr);
 222         switch(configure->vcc){
 223                 case 0:  /* Vcc 0 */
 224                         switch(configure->vpp) {
 225                                 case 0:
 226                                         pcr |= SET_VCC_VPP(VCC_HIZ,VPP_GND,
 227                                                         configure->sock);
 228                                         break;
 229                                 case 12:
 230                                         pcr |= SET_VCC_VPP(VCC_HIZ,VPP_12V,
 231                                                         configure->sock);
 232                                         break;
 233                                 case 50:
 234                                         pcr |= SET_VCC_VPP(VCC_HIZ,VPP_5V,
 235                                                         configure->sock);
 236                                         break;
 237                                 case 33:
 238                                         pcr |= SET_VCC_VPP(VCC_HIZ,VPP_3V,
 239                                                         configure->sock);
 240                                         break;
 241                                 default:
 242                                         pcr |= SET_VCC_VPP(VCC_HIZ,VPP_HIZ,
 243                                                         configure->sock);
 244                                         printk("%s: bad Vcc/Vpp (%d:%d)\n",
 245                                                         __func__,
 246                                                         configure->vcc,
 247                                                         configure->vpp);
 248                                         break;
 249                         }
 250                         break;
 251                 case 50: /* Vcc 5V */
 252                         switch(configure->vpp) {
 253                                 case 0:
 254                                         pcr |= SET_VCC_VPP(VCC_5V,VPP_GND,
 255                                                         configure->sock);
 256                                         break;
 257                                 case 50:
 258                                         pcr |= SET_VCC_VPP(VCC_5V,VPP_5V,
 259                                                         configure->sock);
 260                                         break;
 261                                 case 12:
 262                                         pcr |= SET_VCC_VPP(VCC_5V,VPP_12V,
 263                                                         configure->sock);
 264                                         break;
 265                                 case 33:
 266                                         pcr |= SET_VCC_VPP(VCC_5V,VPP_3V,
 267                                                         configure->sock);
 268                                         break;
 269                                 default:
 270                                         pcr |= SET_VCC_VPP(VCC_HIZ,VPP_HIZ,
 271                                                         configure->sock);
 272                                         printk("%s: bad Vcc/Vpp (%d:%d)\n",
 273                                                         __func__,
 274                                                         configure->vcc,
 275                                                         configure->vpp);
 276                                         break;
 277                         }
 278                         break;
 279                 case 33: /* Vcc 3.3V */
 280                         switch(configure->vpp) {
 281                                 case 0:
 282                                         pcr |= SET_VCC_VPP(VCC_3V,VPP_GND,
 283                                                         configure->sock);
 284                                         break;
 285                                 case 50:
 286                                         pcr |= SET_VCC_VPP(VCC_3V,VPP_5V,
 287                                                         configure->sock);
 288                                         break;
 289                                 case 12:
 290                                         pcr |= SET_VCC_VPP(VCC_3V,VPP_12V,
 291                                                         configure->sock);
 292                                         break;
 293                                 case 33:
 294                                         pcr |= SET_VCC_VPP(VCC_3V,VPP_3V,
 295                                                         configure->sock);
 296                                         break;
 297                                 default:
 298                                         pcr |= SET_VCC_VPP(VCC_HIZ,VPP_HIZ,
 299                                                         configure->sock);
 300                                         printk("%s: bad Vcc/Vpp (%d:%d)\n",
 301                                                         __func__,
 302                                                         configure->vcc,
 303                                                         configure->vpp);
 304                                         break;
 305                         }
 306                         break;
 307                 default: /* what's this ? */
 308                         pcr |= SET_VCC_VPP(VCC_HIZ,VPP_HIZ,configure->sock);
 309                         printk(KERN_ERR "%s: bad Vcc %d\n",
 310                                         __func__, configure->vcc);
 311                         break;
 312         }
 313
 314         if (configure->sock == 0) {
 315         pcr &= ~(PCR_SLOT_0_RST);
 316                 if (configure->reset)
 317                 pcr |= PCR_SLOT_0_RST;
 318         }
 319         else {
 320                 pcr &= ~(PCR_SLOT_1_RST);
 321                 if (configure->reset)
 322                         pcr |= PCR_SLOT_1_RST;
 323         }
 324         au_writel(pcr, PB1000_PCR);
 325         au_sync_delay(300);
 326
 327 #else
 328
 329         pcr = au_readw(PCMCIA_BOARD_REG) & ~0xf;
 330
 331         debug("Vcc %dV Vpp %dV, pcr %x, reset %d\n",
 332                         configure->vcc, configure->vpp, pcr, configure->reset);
 333
 334
 335         switch(configure->vcc){
 336                 case 0:  /* Vcc 0 */
 337                         pcr |= SET_VCC_VPP(0,0);
 338                         break;
 339                 case 50: /* Vcc 5V */
 340                         switch(configure->vpp) {
 341                                 case 0:
 342                                         pcr |= SET_VCC_VPP(2,0);
 343                                         break;
 344                                 case 50:
 345                                         pcr |= SET_VCC_VPP(2,1);
 346                                         break;
 347                                 case 12:
 348                                         pcr |= SET_VCC_VPP(2,2);
 349                                         break;
 350                                 case 33:
 351                                 default:
 352                                         pcr |= SET_VCC_VPP(0,0);
 353                                         printk("%s: bad Vcc/Vpp (%d:%d)\n",
 354                                                         __func__,
 355                                                         configure->vcc,
 356                                                         configure->vpp);
 357                                         break;
 358                         }
 359                         break;
 360                 case 33: /* Vcc 3.3V */
 361                         switch(configure->vpp) {
 362                                 case 0:
 363                                         pcr |= SET_VCC_VPP(1,0);
 364                                         break;
 365                                 case 12:
 366                                         pcr |= SET_VCC_VPP(1,2);
 367                                         break;
 368                                 case 33:
 369                                         pcr |= SET_VCC_VPP(1,1);
 370                                         break;
 371                                 case 50:
 372                                 default:
 373                                         pcr |= SET_VCC_VPP(0,0);
 374                                         printk("%s: bad Vcc/Vpp (%d:%d)\n",
 375                                                         __func__,
 376                                                         configure->vcc,
 377                                                         configure->vpp);
 378                                         break;
 379                         }
 380                         break;
 381                 default: /* what's this ? */
 382                         pcr |= SET_VCC_VPP(0,0);
 383                         printk(KERN_ERR "%s: bad Vcc %d\n",
 384                                         __func__, configure->vcc);
 385                         break;
 386         }
 387
 388         au_writew(pcr, PCMCIA_BOARD_REG);
 389         au_sync_delay(300);
 390
 391         if (!configure->reset) {
 392                 pcr |= PC_DRV_EN;
 393                 au_writew(pcr, PCMCIA_BOARD_REG);
 394                 au_sync_delay(100);
 395                 pcr |= PC_DEASSERT_RST;
 396                 au_writew(pcr, PCMCIA_BOARD_REG);
 397                 au_sync_delay(100);
 398         }
 399         else {
 400                 pcr &= ~(PC_DEASSERT_RST | PC_DRV_EN);
 401                 au_writew(pcr, PCMCIA_BOARD_REG);
 402                 au_sync_delay(100);
 403         }
 404 #endif
 405         return 0;
 406 }
 407
 408
 409 struct pcmcia_low_level pb1x00_pcmcia_ops = {
 410         pb1x00_pcmcia_init,
 411         pb1x00_pcmcia_shutdown,
 412         pb1x00_pcmcia_socket_state,
 413         pb1x00_pcmcia_get_irq_info,
 414         pb1x00_pcmcia_configure_socket
 415 };