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/bulkmem.h>
  39 #include <pcmcia/cistpl.h>
  40 #include <pcmcia/bus_ops.h>
  41 #include "cs_internal.h"
  42
  43 #include <asm/io.h>
  44 #include <asm/irq.h>
  45 #include <asm/system.h>
  46
  47 #include <asm/au1000.h>
  48 #include <asm/au1000_pcmcia.h>
  49
  50 #define debug(fmt, arg...) do { } while (0)
  51
  52 #ifdef CONFIG_MIPS_PB1000
  53 #include <asm/pb1000.h>
  54 #define PCMCIA_IRQ AU1000_GPIO_15
  55 #elif defined (CONFIG_MIPS_PB1500)
  56 #include <asm/pb1500.h>
  57 #define PCMCIA_IRQ AU1500_GPIO_203
  58 #elif defined (CONFIG_MIPS_PB1100)
  59 #include <asm/pb1100.h>
  60 #define PCMCIA_IRQ AU1000_GPIO_11
  61 #endif
  62
  63 static int pb1x00_pcmcia_init(struct pcmcia_init *init)
  64 {
  65 #ifdef CONFIG_MIPS_PB1000
  66         u16 pcr;
  67         pcr = PCR_SLOT_0_RST | PCR_SLOT_1_RST;
  68
  69         au_writel(0x8000, PB1000_MDR); /* clear pcmcia interrupt */
  70         au_sync_delay(100);
  71         au_writel(0x4000, PB1000_MDR); /* enable pcmcia interrupt */
  72         au_sync();
  73
  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
  79         return PCMCIA_NUM_SOCKS;
  80
  81 #else /* fixme -- take care of the Pb1500 at some point */
  82
  83         u16 pcr;
  84         pcr = au_readw(PCMCIA_BOARD_REG) & ~0xf; /* turn off power */
  85         pcr &= ~(PC_DEASSERT_RST | PC_DRV_EN);
  86         au_writew(pcr, PCMCIA_BOARD_REG);
  87         au_sync_delay(500);
  88         return PCMCIA_NUM_SOCKS;
  89 #endif
  90 }
  91
  92 static int pb1x00_pcmcia_shutdown(void)
  93 {
  94 #ifdef CONFIG_MIPS_PB1000
  95         u16 pcr;
  96         pcr = PCR_SLOT_0_RST | PCR_SLOT_1_RST;
  97         pcr |= SET_VCC_VPP(VCC_HIZ,VPP_HIZ,0);
  98         pcr |= SET_VCC_VPP(VCC_HIZ,VPP_HIZ,1);
  99         au_writel(pcr, PB1000_PCR);
 100         au_sync_delay(20);
 101         return 0;
 102 #else
 103         u16 pcr;
 104         pcr = au_readw(PCMCIA_BOARD_REG) & ~0xf; /* turn off power */
 105         pcr &= ~(PC_DEASSERT_RST | PC_DRV_EN);
 106         au_writew(pcr, PCMCIA_BOARD_REG);
 107         au_sync_delay(2);
 108         return 0;
 109 #endif
 110 }
 111
 112 static int
 113 pb1x00_pcmcia_socket_state(unsigned sock, struct pcmcia_state *state)
 114 {
 115         u32 inserted0, inserted1;
 116         u16 vs0, vs1;
 117
 118 #ifdef CONFIG_MIPS_PB1000
 119         vs0 = vs1 = (u16)au_readl(PB1000_ACR1);
 120         inserted0 = !(vs0 & (ACR1_SLOT_0_CD1 | ACR1_SLOT_0_CD2));
 121         inserted1 = !(vs1 & (ACR1_SLOT_1_CD1 | ACR1_SLOT_1_CD2));
 122         vs0 = (vs0 >> 4) & 0x3;
 123         vs1 = (vs1 >> 12) & 0x3;
 124 #else
 125         vs0 = (au_readw(BOARD_STATUS_REG) >> 4) & 0x3;
 126 #ifdef CONFIG_MIPS_PB1500
 127         inserted0 = !((au_readl(GPIO2_PINSTATE) >> 1) & 0x1); /* gpio 201 */
 128 #else /* Pb1100 */
 129         inserted0 = !((au_readl(SYS_PINSTATERD) >> 9) & 0x1); /* gpio 9 */
 130 #endif
 131         inserted1 = 0;
 132 #endif
 133
 134         state->ready = 0;
 135         state->vs_Xv = 0;
 136         state->vs_3v = 0;
 137         state->detect = 0;
 138
 139         if (sock == 0) {
 140                 if (inserted0) {
 141                         switch (vs0) {
 142                                 case 0:
 143                                 case 2:
 144                                         state->vs_3v=1;
 145                                         break;
 146                                 case 3: /* 5V */
 147                                         break;
 148                                 default:
 149                                         /* return without setting 'detect' */
 150                                         printk(KERN_ERR "pb1x00 bad VS (%d)\n",
 151                                                         vs0);
 152                                         return 0;
 153                         }
 154                         state->detect = 1;
 155                 }
 156         }
 157         else  {
 158                 if (inserted1) {
 159                         switch (vs1) {
 160                                 case 0:
 161                                 case 2:
 162                                         state->vs_3v=1;
 163                                         break;
 164                                 case 3: /* 5V */
 165                                         break;
 166                                 default:
 167                                         /* return without setting 'detect' */
 168                                         printk(KERN_ERR "pb1x00 bad VS (%d)\n",
 169                                                         vs1);
 170                                         return 0;
 171                         }
 172                         state->detect = 1;
 173                 }
 174         }
 175
 176         if (state->detect) {
 177                 state->ready = 1;
 178         }
 179
 180         state->bvd1=1;
 181         state->bvd2=1;
 182         state->wrprot=0;
 183         return 1;
 184 }
 185
 186
 187 static int pb1x00_pcmcia_get_irq_info(struct pcmcia_irq_info *info)
 188 {
 189
 190         if(info->sock > PCMCIA_MAX_SOCK) return -1;
 191
 192         /*
 193          * Even in the case of the Pb1000, both sockets are connected
 194          * to the same irq line.
 195          */
 196         info->irq = PCMCIA_IRQ;
 197
 198         return 0;
 199 }
 200
 201
 202 static int
 203 pb1x00_pcmcia_configure_socket(const struct pcmcia_configure *configure)
 204 {
 205         u16 pcr;
 206
 207         if(configure->sock > PCMCIA_MAX_SOCK) return -1;
 208
 209 #ifdef CONFIG_MIPS_PB1000
 210         pcr = au_readl(PB1000_PCR);
 211
 212         if (configure->sock == 0) {
 213                 pcr &= ~(PCR_SLOT_0_VCC0 | PCR_SLOT_0_VCC1 |
 214                                 PCR_SLOT_0_VPP0 | PCR_SLOT_0_VPP1);
 215         }
 216         else  {
 217                 pcr &= ~(PCR_SLOT_1_VCC0 | PCR_SLOT_1_VCC1 |
 218                                 PCR_SLOT_1_VPP0 | PCR_SLOT_1_VPP1);
 219         }
 220
 221         pcr &= ~PCR_SLOT_0_RST;
 222         debug("Vcc %dV Vpp %dV, pcr %x\n",
 223                         configure->vcc, configure->vpp, pcr);
 224         switch(configure->vcc){
 225                 case 0:  /* Vcc 0 */
 226                         switch(configure->vpp) {
 227                                 case 0:
 228                                         pcr |= SET_VCC_VPP(VCC_HIZ,VPP_GND,
 229                                                         configure->sock);
 230                                         break;
 231                                 case 12:
 232                                         pcr |= SET_VCC_VPP(VCC_HIZ,VPP_12V,
 233                                                         configure->sock);
 234                                         break;
 235                                 case 50:
 236                                         pcr |= SET_VCC_VPP(VCC_HIZ,VPP_5V,
 237                                                         configure->sock);
 238                                         break;
 239                                 case 33:
 240                                         pcr |= SET_VCC_VPP(VCC_HIZ,VPP_3V,
 241                                                         configure->sock);
 242                                         break;
 243                                 default:
 244                                         pcr |= SET_VCC_VPP(VCC_HIZ,VPP_HIZ,
 245                                                         configure->sock);
 246                                         printk("%s: bad Vcc/Vpp (%d:%d)\n",
 247                                                         __FUNCTION__,
 248                                                         configure->vcc,
 249                                                         configure->vpp);
 250                                         break;
 251                         }
 252                         break;
 253                 case 50: /* Vcc 5V */
 254                         switch(configure->vpp) {
 255                                 case 0:
 256                                         pcr |= SET_VCC_VPP(VCC_5V,VPP_GND,
 257                                                         configure->sock);
 258                                         break;
 259                                 case 50:
 260                                         pcr |= SET_VCC_VPP(VCC_5V,VPP_5V,
 261                                                         configure->sock);
 262                                         break;
 263                                 case 12:
 264                                         pcr |= SET_VCC_VPP(VCC_5V,VPP_12V,
 265                                                         configure->sock);
 266                                         break;
 267                                 case 33:
 268                                         pcr |= SET_VCC_VPP(VCC_5V,VPP_3V,
 269                                                         configure->sock);
 270                                         break;
 271                                 default:
 272                                         pcr |= SET_VCC_VPP(VCC_HIZ,VPP_HIZ,
 273                                                         configure->sock);
 274                                         printk("%s: bad Vcc/Vpp (%d:%d)\n",
 275                                                         __FUNCTION__,
 276                                                         configure->vcc,
 277                                                         configure->vpp);
 278                                         break;
 279                         }
 280                         break;
 281                 case 33: /* Vcc 3.3V */
 282                         switch(configure->vpp) {
 283                                 case 0:
 284                                         pcr |= SET_VCC_VPP(VCC_3V,VPP_GND,
 285                                                         configure->sock);
 286                                         break;
 287                                 case 50:
 288                                         pcr |= SET_VCC_VPP(VCC_3V,VPP_5V,
 289                                                         configure->sock);
 290                                         break;
 291                                 case 12:
 292                                         pcr |= SET_VCC_VPP(VCC_3V,VPP_12V,
 293                                                         configure->sock);
 294                                         break;
 295                                 case 33:
 296                                         pcr |= SET_VCC_VPP(VCC_3V,VPP_3V,
 297                                                         configure->sock);
 298                                         break;
 299                                 default:
 300                                         pcr |= SET_VCC_VPP(VCC_HIZ,VPP_HIZ,
 301                                                         configure->sock);
 302                                         printk("%s: bad Vcc/Vpp (%d:%d)\n",
 303                                                         __FUNCTION__,
 304                                                         configure->vcc,
 305                                                         configure->vpp);
 306                                         break;
 307                         }
 308                         break;
 309                 default: /* what's this ? */
 310                         pcr |= SET_VCC_VPP(VCC_HIZ,VPP_HIZ,configure->sock);
 311                         printk(KERN_ERR "%s: bad Vcc %d\n",
 312                                         __FUNCTION__, configure->vcc);
 313                         break;
 314         }
 315
 316         if (configure->sock == 0) {
 317         pcr &= ~(PCR_SLOT_0_RST);
 318                 if (configure->reset)
 319                 pcr |= PCR_SLOT_0_RST;
 320         }
 321         else {
 322                 pcr &= ~(PCR_SLOT_1_RST);
 323                 if (configure->reset)
 324                         pcr |= PCR_SLOT_1_RST;
 325         }
 326         au_writel(pcr, PB1000_PCR);
 327         au_sync_delay(300);
 328
 329 #else
 330
 331         pcr = au_readw(PCMCIA_BOARD_REG) & ~0xf;
 332
 333         debug("Vcc %dV Vpp %dV, pcr %x, reset %d\n",
 334                         configure->vcc, configure->vpp, pcr, configure->reset);
 335
 336
 337         switch(configure->vcc){
 338                 case 0:  /* Vcc 0 */
 339                         pcr |= SET_VCC_VPP(0,0);
 340                         break;
 341                 case 50: /* Vcc 5V */
 342                         switch(configure->vpp) {
 343                                 case 0:
 344                                         pcr |= SET_VCC_VPP(2,0);
 345                                         break;
 346                                 case 50:
 347                                         pcr |= SET_VCC_VPP(2,1);
 348                                         break;
 349                                 case 12:
 350                                         pcr |= SET_VCC_VPP(2,2);
 351                                         break;
 352                                 case 33:
 353                                 default:
 354                                         pcr |= SET_VCC_VPP(0,0);
 355                                         printk("%s: bad Vcc/Vpp (%d:%d)\n",
 356                                                         __FUNCTION__,
 357                                                         configure->vcc,
 358                                                         configure->vpp);
 359                                         break;
 360                         }
 361                         break;
 362                 case 33: /* Vcc 3.3V */
 363                         switch(configure->vpp) {
 364                                 case 0:
 365                                         pcr |= SET_VCC_VPP(1,0);
 366                                         break;
 367                                 case 12:
 368                                         pcr |= SET_VCC_VPP(1,2);
 369                                         break;
 370                                 case 33:
 371                                         pcr |= SET_VCC_VPP(1,1);
 372                                         break;
 373                                 case 50:
 374                                 default:
 375                                         pcr |= SET_VCC_VPP(0,0);
 376                                         printk("%s: bad Vcc/Vpp (%d:%d)\n",
 377                                                         __FUNCTION__,
 378                                                         configure->vcc,
 379                                                         configure->vpp);
 380                                         break;
 381                         }
 382                         break;
 383                 default: /* what's this ? */
 384                         pcr |= SET_VCC_VPP(0,0);
 385                         printk(KERN_ERR "%s: bad Vcc %d\n",
 386                                         __FUNCTION__, configure->vcc);
 387                         break;
 388         }
 389
 390         au_writew(pcr, PCMCIA_BOARD_REG);
 391         au_sync_delay(300);
 392
 393         if (!configure->reset) {
 394                 pcr |= PC_DRV_EN;
 395                 au_writew(pcr, PCMCIA_BOARD_REG);
 396                 au_sync_delay(100);
 397                 pcr |= PC_DEASSERT_RST;
 398                 au_writew(pcr, PCMCIA_BOARD_REG);
 399                 au_sync_delay(100);
 400         }
 401         else {
 402                 pcr &= ~(PC_DEASSERT_RST | PC_DRV_EN);
 403                 au_writew(pcr, PCMCIA_BOARD_REG);
 404                 au_sync_delay(100);
 405         }
 406 #endif
 407         return 0;
 408 }
 409
 410
 411 struct pcmcia_low_level pb1x00_pcmcia_ops = {
 412         pb1x00_pcmcia_init,
 413         pb1x00_pcmcia_shutdown,
 414         pb1x00_pcmcia_socket_state,
 415         pb1x00_pcmcia_get_irq_info,
 416         pb1x00_pcmcia_configure_socket
 417 };