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 #include "cs_internal.h"
  41
  42 #include <asm/io.h>
  43 #include <asm/irq.h>
  44 #include <asm/system.h>
  45
  46 #include <asm/au1000.h>
  47 #include <asm/au1000_pcmcia.h>
  48
  49 #define debug(fmt, arg...) do { } while (0)
  50
  51 #ifdef CONFIG_MIPS_PB1000
  52 #include <asm/pb1000.h>
  53 #define PCMCIA_IRQ AU1000_GPIO_15
  54 #elif defined (CONFIG_MIPS_PB1500)
  55 #include <asm/pb1500.h>
  56 #define PCMCIA_IRQ AU1500_GPIO_203
  57 #elif defined (CONFIG_MIPS_PB1100)
  58 #include <asm/pb1100.h>
  59 #define PCMCIA_IRQ AU1000_GPIO_11
  60 #endif
  61
  62 static int pb1x00_pcmcia_init(struct pcmcia_init *init)
  63 {
  64 #ifdef CONFIG_MIPS_PB1000
  65         u16 pcr;
  66         pcr = PCR_SLOT_0_RST | PCR_SLOT_1_RST;
  67
  68         au_writel(0x8000, PB1000_MDR); /* clear pcmcia interrupt */
  69         au_sync_delay(100);
  70         au_writel(0x4000, PB1000_MDR); /* enable pcmcia interrupt */
  71         au_sync();
  72
  73         pcr |= SET_VCC_VPP(VCC_HIZ,VPP_HIZ,0);
  74         pcr |= SET_VCC_VPP(VCC_HIZ,VPP_HIZ,1);
  75         au_writel(pcr, PB1000_PCR);
  76         au_sync_delay(20);
  77
  78         return PCMCIA_NUM_SOCKS;
  79
  80 #else /* fixme -- take care of the Pb1500 at some point */
  81
  82         u16 pcr;
  83         pcr = au_readw(PCMCIA_BOARD_REG) & ~0xf; /* turn off power */
  84         pcr &= ~(PC_DEASSERT_RST | PC_DRV_EN);
  85         au_writew(pcr, PCMCIA_BOARD_REG);
  86         au_sync_delay(500);
  87         return PCMCIA_NUM_SOCKS;
  88 #endif
  89 }
  90
  91 static int pb1x00_pcmcia_shutdown(void)
  92 {
  93 #ifdef CONFIG_MIPS_PB1000
  94         u16 pcr;
  95         pcr = PCR_SLOT_0_RST | PCR_SLOT_1_RST;
  96         pcr |= SET_VCC_VPP(VCC_HIZ,VPP_HIZ,0);
  97         pcr |= SET_VCC_VPP(VCC_HIZ,VPP_HIZ,1);
  98         au_writel(pcr, PB1000_PCR);
  99         au_sync_delay(20);
 100         return 0;
 101 #else
 102         u16 pcr;
 103         pcr = au_readw(PCMCIA_BOARD_REG) & ~0xf; /* turn off power */
 104         pcr &= ~(PC_DEASSERT_RST | PC_DRV_EN);
 105         au_writew(pcr, PCMCIA_BOARD_REG);
 106         au_sync_delay(2);
 107         return 0;
 108 #endif
 109 }
 110
 111 static int
 112 pb1x00_pcmcia_socket_state(unsigned sock, struct pcmcia_state *state)
 113 {
 114         u32 inserted0, inserted1;
 115         u16 vs0, vs1;
 116
 117 #ifdef CONFIG_MIPS_PB1000
 118         vs0 = vs1 = (u16)au_readl(PB1000_ACR1);
 119         inserted0 = !(vs0 & (ACR1_SLOT_0_CD1 | ACR1_SLOT_0_CD2));
 120         inserted1 = !(vs1 & (ACR1_SLOT_1_CD1 | ACR1_SLOT_1_CD2));
 121         vs0 = (vs0 >> 4) & 0x3;
 122         vs1 = (vs1 >> 12) & 0x3;
 123 #else
 124         vs0 = (au_readw(BOARD_STATUS_REG) >> 4) & 0x3;
 125 #ifdef CONFIG_MIPS_PB1500
 126         inserted0 = !((au_readl(GPIO2_PINSTATE) >> 1) & 0x1); /* gpio 201 */
 127 #else /* Pb1100 */
 128         inserted0 = !((au_readl(SYS_PINSTATERD) >> 9) & 0x1); /* gpio 9 */
 129 #endif
 130         inserted1 = 0;
 131 #endif
 132
 133         state->ready = 0;
 134         state->vs_Xv = 0;
 135         state->vs_3v = 0;
 136         state->detect = 0;
 137
 138         if (sock == 0) {
 139                 if (inserted0) {
 140                         switch (vs0) {
 141                                 case 0:
 142                                 case 2:
 143                                         state->vs_3v=1;
 144                                         break;
 145                                 case 3: /* 5V */
 146                                         break;
 147                                 default:
 148                                         /* return without setting 'detect' */
 149                                         printk(KERN_ERR "pb1x00 bad VS (%d)\n",
 150                                                         vs0);
 151                                         return 0;
 152                         }
 153                         state->detect = 1;
 154                 }
 155         }
 156         else  {
 157                 if (inserted1) {
 158                         switch (vs1) {
 159                                 case 0:
 160                                 case 2:
 161                                         state->vs_3v=1;
 162                                         break;
 163                                 case 3: /* 5V */
 164                                         break;
 165                                 default:
 166                                         /* return without setting 'detect' */
 167                                         printk(KERN_ERR "pb1x00 bad VS (%d)\n",
 168                                                         vs1);
 169                                         return 0;
 170                         }
 171                         state->detect = 1;
 172                 }
 173         }
 174
 175         if (state->detect) {
 176                 state->ready = 1;
 177         }
 178
 179         state->bvd1=1;
 180         state->bvd2=1;
 181         state->wrprot=0;
 182         return 1;
 183 }
 184
 185
 186 static int pb1x00_pcmcia_get_irq_info(struct pcmcia_irq_info *info)
 187 {
 188
 189         if(info->sock > PCMCIA_MAX_SOCK) return -1;
 190
 191         /*
 192          * Even in the case of the Pb1000, both sockets are connected
 193          * to the same irq line.
 194          */
 195         info->irq = PCMCIA_IRQ;
 196
 197         return 0;
 198 }
 199
 200
 201 static int
 202 pb1x00_pcmcia_configure_socket(const struct pcmcia_configure *configure)
 203 {
 204         u16 pcr;
 205
 206         if(configure->sock > PCMCIA_MAX_SOCK) return -1;
 207
 208 #ifdef CONFIG_MIPS_PB1000
 209         pcr = au_readl(PB1000_PCR);
 210
 211         if (configure->sock == 0) {
 212                 pcr &= ~(PCR_SLOT_0_VCC0 | PCR_SLOT_0_VCC1 |
 213                                 PCR_SLOT_0_VPP0 | PCR_SLOT_0_VPP1);
 214         }
 215         else  {
 216                 pcr &= ~(PCR_SLOT_1_VCC0 | PCR_SLOT_1_VCC1 |
 217                                 PCR_SLOT_1_VPP0 | PCR_SLOT_1_VPP1);
 218         }
 219
 220         pcr &= ~PCR_SLOT_0_RST;
 221         debug("Vcc %dV Vpp %dV, pcr %x\n",
 222                         configure->vcc, configure->vpp, pcr);
 223         switch(configure->vcc){
 224                 case 0:  /* Vcc 0 */
 225                         switch(configure->vpp) {
 226                                 case 0:
 227                                         pcr |= SET_VCC_VPP(VCC_HIZ,VPP_GND,
 228                                                         configure->sock);
 229                                         break;
 230                                 case 12:
 231                                         pcr |= SET_VCC_VPP(VCC_HIZ,VPP_12V,
 232                                                         configure->sock);
 233                                         break;
 234                                 case 50:
 235                                         pcr |= SET_VCC_VPP(VCC_HIZ,VPP_5V,
 236                                                         configure->sock);
 237                                         break;
 238                                 case 33:
 239                                         pcr |= SET_VCC_VPP(VCC_HIZ,VPP_3V,
 240                                                         configure->sock);
 241                                         break;
 242                                 default:
 243                                         pcr |= SET_VCC_VPP(VCC_HIZ,VPP_HIZ,
 244                                                         configure->sock);
 245                                         printk("%s: bad Vcc/Vpp (%d:%d)\n",
 246                                                         __func__,
 247                                                         configure->vcc,
 248                                                         configure->vpp);
 249                                         break;
 250                         }
 251                         break;
 252                 case 50: /* Vcc 5V */
 253                         switch(configure->vpp) {
 254                                 case 0:
 255                                         pcr |= SET_VCC_VPP(VCC_5V,VPP_GND,
 256                                                         configure->sock);
 257                                         break;
 258                                 case 50:
 259                                         pcr |= SET_VCC_VPP(VCC_5V,VPP_5V,
 260                                                         configure->sock);
 261                                         break;
 262                                 case 12:
 263                                         pcr |= SET_VCC_VPP(VCC_5V,VPP_12V,
 264                                                         configure->sock);
 265                                         break;
 266                                 case 33:
 267                                         pcr |= SET_VCC_VPP(VCC_5V,VPP_3V,
 268                                                         configure->sock);
 269                                         break;
 270                                 default:
 271                                         pcr |= SET_VCC_VPP(VCC_HIZ,VPP_HIZ,
 272                                                         configure->sock);
 273                                         printk("%s: bad Vcc/Vpp (%d:%d)\n",
 274                                                         __func__,
 275                                                         configure->vcc,
 276                                                         configure->vpp);
 277                                         break;
 278                         }
 279                         break;
 280                 case 33: /* Vcc 3.3V */
 281                         switch(configure->vpp) {
 282                                 case 0:
 283                                         pcr |= SET_VCC_VPP(VCC_3V,VPP_GND,
 284                                                         configure->sock);
 285                                         break;
 286                                 case 50:
 287                                         pcr |= SET_VCC_VPP(VCC_3V,VPP_5V,
 288                                                         configure->sock);
 289                                         break;
 290                                 case 12:
 291                                         pcr |= SET_VCC_VPP(VCC_3V,VPP_12V,
 292                                                         configure->sock);
 293                                         break;
 294                                 case 33:
 295                                         pcr |= SET_VCC_VPP(VCC_3V,VPP_3V,
 296                                                         configure->sock);
 297                                         break;
 298                                 default:
 299                                         pcr |= SET_VCC_VPP(VCC_HIZ,VPP_HIZ,
 300                                                         configure->sock);
 301                                         printk("%s: bad Vcc/Vpp (%d:%d)\n",
 302                                                         __func__,
 303                                                         configure->vcc,
 304                                                         configure->vpp);
 305                                         break;
 306                         }
 307                         break;
 308                 default: /* what's this ? */
 309                         pcr |= SET_VCC_VPP(VCC_HIZ,VPP_HIZ,configure->sock);
 310                         printk(KERN_ERR "%s: bad Vcc %d\n",
 311                                         __func__, configure->vcc);
 312                         break;
 313         }
 314
 315         if (configure->sock == 0) {
 316         pcr &= ~(PCR_SLOT_0_RST);
 317                 if (configure->reset)
 318                 pcr |= PCR_SLOT_0_RST;
 319         }
 320         else {
 321                 pcr &= ~(PCR_SLOT_1_RST);
 322                 if (configure->reset)
 323                         pcr |= PCR_SLOT_1_RST;
 324         }
 325         au_writel(pcr, PB1000_PCR);
 326         au_sync_delay(300);
 327
 328 #else
 329
 330         pcr = au_readw(PCMCIA_BOARD_REG) & ~0xf;
 331
 332         debug("Vcc %dV Vpp %dV, pcr %x, reset %d\n",
 333                         configure->vcc, configure->vpp, pcr, configure->reset);
 334
 335
 336         switch(configure->vcc){
 337                 case 0:  /* Vcc 0 */
 338                         pcr |= SET_VCC_VPP(0,0);
 339                         break;
 340                 case 50: /* Vcc 5V */
 341                         switch(configure->vpp) {
 342                                 case 0:
 343                                         pcr |= SET_VCC_VPP(2,0);
 344                                         break;
 345                                 case 50:
 346                                         pcr |= SET_VCC_VPP(2,1);
 347                                         break;
 348                                 case 12:
 349                                         pcr |= SET_VCC_VPP(2,2);
 350                                         break;
 351                                 case 33:
 352                                 default:
 353                                         pcr |= SET_VCC_VPP(0,0);
 354                                         printk("%s: bad Vcc/Vpp (%d:%d)\n",
 355                                                         __func__,
 356                                                         configure->vcc,
 357                                                         configure->vpp);
 358                                         break;
 359                         }
 360                         break;
 361                 case 33: /* Vcc 3.3V */
 362                         switch(configure->vpp) {
 363                                 case 0:
 364                                         pcr |= SET_VCC_VPP(1,0);
 365                                         break;
 366                                 case 12:
 367                                         pcr |= SET_VCC_VPP(1,2);
 368                                         break;
 369                                 case 33:
 370                                         pcr |= SET_VCC_VPP(1,1);
 371                                         break;
 372                                 case 50:
 373                                 default:
 374                                         pcr |= SET_VCC_VPP(0,0);
 375                                         printk("%s: bad Vcc/Vpp (%d:%d)\n",
 376                                                         __func__,
 377                                                         configure->vcc,
 378                                                         configure->vpp);
 379                                         break;
 380                         }
 381                         break;
 382                 default: /* what's this ? */
 383                         pcr |= SET_VCC_VPP(0,0);
 384                         printk(KERN_ERR "%s: bad Vcc %d\n",
 385                                         __func__, configure->vcc);
 386                         break;
 387         }
 388
 389         au_writew(pcr, PCMCIA_BOARD_REG);
 390         au_sync_delay(300);
 391
 392         if (!configure->reset) {
 393                 pcr |= PC_DRV_EN;
 394                 au_writew(pcr, PCMCIA_BOARD_REG);
 395                 au_sync_delay(100);
 396                 pcr |= PC_DEASSERT_RST;
 397                 au_writew(pcr, PCMCIA_BOARD_REG);
 398                 au_sync_delay(100);
 399         }
 400         else {
 401                 pcr &= ~(PC_DEASSERT_RST | PC_DRV_EN);
 402                 au_writew(pcr, PCMCIA_BOARD_REG);
 403                 au_sync_delay(100);
 404         }
 405 #endif
 406         return 0;
 407 }
 408
 409
 410 struct pcmcia_low_level pb1x00_pcmcia_ops = {
 411         pb1x00_pcmcia_init,
 412         pb1x00_pcmcia_shutdown,
 413         pb1x00_pcmcia_socket_state,
 414         pb1x00_pcmcia_get_irq_info,
 415         pb1x00_pcmcia_configure_socket
 416 };