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/timer.h>
  30 #include <linux/mm.h>
  31 #include <linux/proc_fs.h>
  32 #include <linux/types.h>
  33
  34 #include <pcmcia/cs_types.h>
  35 #include <pcmcia/cs.h>
  36 #include <pcmcia/ss.h>
  37 #include <pcmcia/cistpl.h>
  38 #include <pcmcia/bus_ops.h>
  39
  40 #include <asm/io.h>
  41 #include <asm/irq.h>
  42 #include <asm/system.h>
  43
  44 #include <asm/au1000.h>
  45 #include <asm/au1000_pcmcia.h>
  46
  47 #define debug(fmt, arg...) do { } while (0)
  48
  49 #ifdef CONFIG_MIPS_PB1000
  50 #include <asm/pb1000.h>
  51 #define PCMCIA_IRQ AU1000_GPIO_15
  52 #elif defined (CONFIG_MIPS_PB1500)
  53 #include <asm/pb1500.h>
  54 #define PCMCIA_IRQ AU1500_GPIO_203
  55 #elif defined (CONFIG_MIPS_PB1100)
  56 #include <asm/pb1100.h>
  57 #define PCMCIA_IRQ AU1000_GPIO_11
  58 #endif
  59
  60 static int pb1x00_pcmcia_init(struct pcmcia_init *init)
  61 {
  62 #ifdef CONFIG_MIPS_PB1000
  63         u16 pcr;
  64         pcr = PCR_SLOT_0_RST | PCR_SLOT_1_RST;
  65
  66         au_writel(0x8000, PB1000_MDR); /* clear pcmcia interrupt */
  67         au_sync_delay(100);
  68         au_writel(0x4000, PB1000_MDR); /* enable pcmcia interrupt */
  69         au_sync();
  70
  71         pcr |= SET_VCC_VPP(VCC_HIZ,VPP_HIZ,0);
  72         pcr |= SET_VCC_VPP(VCC_HIZ,VPP_HIZ,1);
  73         au_writel(pcr, PB1000_PCR);
  74         au_sync_delay(20);
  75
  76         return PCMCIA_NUM_SOCKS;
  77
  78 #else /* fixme -- take care of the Pb1500 at some point */
  79
  80         u16 pcr;
  81         pcr = au_readw(PCMCIA_BOARD_REG) & ~0xf; /* turn off power */
  82         pcr &= ~(PC_DEASSERT_RST | PC_DRV_EN);
  83         au_writew(pcr, PCMCIA_BOARD_REG);
  84         au_sync_delay(500);
  85         return PCMCIA_NUM_SOCKS;
  86 #endif
  87 }
  88
  89 static int pb1x00_pcmcia_shutdown(void)
  90 {
  91 #ifdef CONFIG_MIPS_PB1000
  92         u16 pcr;
  93         pcr = PCR_SLOT_0_RST | PCR_SLOT_1_RST;
  94         pcr |= SET_VCC_VPP(VCC_HIZ,VPP_HIZ,0);
  95         pcr |= SET_VCC_VPP(VCC_HIZ,VPP_HIZ,1);
  96         au_writel(pcr, PB1000_PCR);
  97         au_sync_delay(20);
  98         return 0;
  99 #else
 100         u16 pcr;
 101         pcr = au_readw(PCMCIA_BOARD_REG) & ~0xf; /* turn off power */
 102         pcr &= ~(PC_DEASSERT_RST | PC_DRV_EN);
 103         au_writew(pcr, PCMCIA_BOARD_REG);
 104         au_sync_delay(2);
 105         return 0;
 106 #endif
 107 }
 108
 109 static int
 110 pb1x00_pcmcia_socket_state(unsigned sock, struct pcmcia_state *state)
 111 {
 112         u32 inserted0, inserted1;
 113         u16 vs0, vs1;
 114
 115 #ifdef CONFIG_MIPS_PB1000
 116         vs0 = vs1 = (u16)au_readl(PB1000_ACR1);
 117         inserted0 = !(vs0 & (ACR1_SLOT_0_CD1 | ACR1_SLOT_0_CD2));
 118         inserted1 = !(vs1 & (ACR1_SLOT_1_CD1 | ACR1_SLOT_1_CD2));
 119         vs0 = (vs0 >> 4) & 0x3;
 120         vs1 = (vs1 >> 12) & 0x3;
 121 #else
 122         vs0 = (au_readw(BOARD_STATUS_REG) >> 4) & 0x3;
 123 #ifdef CONFIG_MIPS_PB1500
 124         inserted0 = !((au_readl(GPIO2_PINSTATE) >> 1) & 0x1); /* gpio 201 */
 125 #else /* Pb1100 */
 126         inserted0 = !((au_readl(SYS_PINSTATERD) >> 9) & 0x1); /* gpio 9 */
 127 #endif
 128         inserted1 = 0;
 129 #endif
 130
 131         state->ready = 0;
 132         state->vs_Xv = 0;
 133         state->vs_3v = 0;
 134         state->detect = 0;
 135
 136         if (sock == 0) {
 137                 if (inserted0) {
 138                         switch (vs0) {
 139                                 case 0:
 140                                 case 2:
 141                                         state->vs_3v=1;
 142                                         break;
 143                                 case 3: /* 5V */
 144                                         break;
 145                                 default:
 146                                         /* return without setting 'detect' */
 147                                         printk(KERN_ERR "pb1x00 bad VS (%d)\n",
 148                                                         vs0);
 149                                         return 0;
 150                         }
 151                         state->detect = 1;
 152                 }
 153         }
 154         else  {
 155                 if (inserted1) {
 156                         switch (vs1) {
 157                                 case 0:
 158                                 case 2:
 159                                         state->vs_3v=1;
 160                                         break;
 161                                 case 3: /* 5V */
 162                                         break;
 163                                 default:
 164                                         /* return without setting 'detect' */
 165                                         printk(KERN_ERR "pb1x00 bad VS (%d)\n",
 166                                                         vs1);
 167                                         return 0;
 168                         }
 169                         state->detect = 1;
 170                 }
 171         }
 172
 173         if (state->detect) {
 174                 state->ready = 1;
 175         }
 176
 177         state->bvd1=1;
 178         state->bvd2=1;
 179         state->wrprot=0;
 180         return 1;
 181 }
 182
 183
 184 static int pb1x00_pcmcia_get_irq_info(struct pcmcia_irq_info *info)
 185 {
 186
 187         if(info->sock > PCMCIA_MAX_SOCK) return -1;
 188
 189         /*
 190          * Even in the case of the Pb1000, both sockets are connected
 191          * to the same irq line.
 192          */
 193         info->irq = PCMCIA_IRQ;
 194
 195         return 0;
 196 }
 197
 198
 199 static int
 200 pb1x00_pcmcia_configure_socket(const struct pcmcia_configure *configure)
 201 {
 202         u16 pcr;
 203
 204         if(configure->sock > PCMCIA_MAX_SOCK) return -1;
 205
 206 #ifdef CONFIG_MIPS_PB1000
 207         pcr = au_readl(PB1000_PCR);
 208
 209         if (configure->sock == 0) {
 210                 pcr &= ~(PCR_SLOT_0_VCC0 | PCR_SLOT_0_VCC1 |
 211                                 PCR_SLOT_0_VPP0 | PCR_SLOT_0_VPP1);
 212         }
 213         else  {
 214                 pcr &= ~(PCR_SLOT_1_VCC0 | PCR_SLOT_1_VCC1 |
 215                                 PCR_SLOT_1_VPP0 | PCR_SLOT_1_VPP1);
 216         }
 217
 218         pcr &= ~PCR_SLOT_0_RST;
 219         debug("Vcc %dV Vpp %dV, pcr %x\n",
 220                         configure->vcc, configure->vpp, pcr);
 221         switch(configure->vcc){
 222                 case 0:  /* Vcc 0 */
 223                         switch(configure->vpp) {
 224                                 case 0:
 225                                         pcr |= SET_VCC_VPP(VCC_HIZ,VPP_GND,
 226                                                         configure->sock);
 227                                         break;
 228                                 case 12:
 229                                         pcr |= SET_VCC_VPP(VCC_HIZ,VPP_12V,
 230                                                         configure->sock);
 231                                         break;
 232                                 case 50:
 233                                         pcr |= SET_VCC_VPP(VCC_HIZ,VPP_5V,
 234                                                         configure->sock);
 235                                         break;
 236                                 case 33:
 237                                         pcr |= SET_VCC_VPP(VCC_HIZ,VPP_3V,
 238                                                         configure->sock);
 239                                         break;
 240                                 default:
 241                                         pcr |= SET_VCC_VPP(VCC_HIZ,VPP_HIZ,
 242                                                         configure->sock);
 243                                         printk("%s: bad Vcc/Vpp (%d:%d)\n",
 244                                                         __func__,
 245                                                         configure->vcc,
 246                                                         configure->vpp);
 247                                         break;
 248                         }
 249                         break;
 250                 case 50: /* Vcc 5V */
 251                         switch(configure->vpp) {
 252                                 case 0:
 253                                         pcr |= SET_VCC_VPP(VCC_5V,VPP_GND,
 254                                                         configure->sock);
 255                                         break;
 256                                 case 50:
 257                                         pcr |= SET_VCC_VPP(VCC_5V,VPP_5V,
 258                                                         configure->sock);
 259                                         break;
 260                                 case 12:
 261                                         pcr |= SET_VCC_VPP(VCC_5V,VPP_12V,
 262                                                         configure->sock);
 263                                         break;
 264                                 case 33:
 265                                         pcr |= SET_VCC_VPP(VCC_5V,VPP_3V,
 266                                                         configure->sock);
 267                                         break;
 268                                 default:
 269                                         pcr |= SET_VCC_VPP(VCC_HIZ,VPP_HIZ,
 270                                                         configure->sock);
 271                                         printk("%s: bad Vcc/Vpp (%d:%d)\n",
 272                                                         __func__,
 273                                                         configure->vcc,
 274                                                         configure->vpp);
 275                                         break;
 276                         }
 277                         break;
 278                 case 33: /* Vcc 3.3V */
 279                         switch(configure->vpp) {
 280                                 case 0:
 281                                         pcr |= SET_VCC_VPP(VCC_3V,VPP_GND,
 282                                                         configure->sock);
 283                                         break;
 284                                 case 50:
 285                                         pcr |= SET_VCC_VPP(VCC_3V,VPP_5V,
 286                                                         configure->sock);
 287                                         break;
 288                                 case 12:
 289                                         pcr |= SET_VCC_VPP(VCC_3V,VPP_12V,
 290                                                         configure->sock);
 291                                         break;
 292                                 case 33:
 293                                         pcr |= SET_VCC_VPP(VCC_3V,VPP_3V,
 294                                                         configure->sock);
 295                                         break;
 296                                 default:
 297                                         pcr |= SET_VCC_VPP(VCC_HIZ,VPP_HIZ,
 298                                                         configure->sock);
 299                                         printk("%s: bad Vcc/Vpp (%d:%d)\n",
 300                                                         __func__,
 301                                                         configure->vcc,
 302                                                         configure->vpp);
 303                                         break;
 304                         }
 305                         break;
 306                 default: /* what's this ? */
 307                         pcr |= SET_VCC_VPP(VCC_HIZ,VPP_HIZ,configure->sock);
 308                         printk(KERN_ERR "%s: bad Vcc %d\n",
 309                                         __func__, configure->vcc);
 310                         break;
 311         }
 312
 313         if (configure->sock == 0) {
 314         pcr &= ~(PCR_SLOT_0_RST);
 315                 if (configure->reset)
 316                 pcr |= PCR_SLOT_0_RST;
 317         }
 318         else {
 319                 pcr &= ~(PCR_SLOT_1_RST);
 320                 if (configure->reset)
 321                         pcr |= PCR_SLOT_1_RST;
 322         }
 323         au_writel(pcr, PB1000_PCR);
 324         au_sync_delay(300);
 325
 326 #else
 327
 328         pcr = au_readw(PCMCIA_BOARD_REG) & ~0xf;
 329
 330         debug("Vcc %dV Vpp %dV, pcr %x, reset %d\n",
 331                         configure->vcc, configure->vpp, pcr, configure->reset);
 332
 333
 334         switch(configure->vcc){
 335                 case 0:  /* Vcc 0 */
 336                         pcr |= SET_VCC_VPP(0,0);
 337                         break;
 338                 case 50: /* Vcc 5V */
 339                         switch(configure->vpp) {
 340                                 case 0:
 341                                         pcr |= SET_VCC_VPP(2,0);
 342                                         break;
 343                                 case 50:
 344                                         pcr |= SET_VCC_VPP(2,1);
 345                                         break;
 346                                 case 12:
 347                                         pcr |= SET_VCC_VPP(2,2);
 348                                         break;
 349                                 case 33:
 350                                 default:
 351                                         pcr |= SET_VCC_VPP(0,0);
 352                                         printk("%s: bad Vcc/Vpp (%d:%d)\n",
 353                                                         __func__,
 354                                                         configure->vcc,
 355                                                         configure->vpp);
 356                                         break;
 357                         }
 358                         break;
 359                 case 33: /* Vcc 3.3V */
 360                         switch(configure->vpp) {
 361                                 case 0:
 362                                         pcr |= SET_VCC_VPP(1,0);
 363                                         break;
 364                                 case 12:
 365                                         pcr |= SET_VCC_VPP(1,2);
 366                                         break;
 367                                 case 33:
 368                                         pcr |= SET_VCC_VPP(1,1);
 369                                         break;
 370                                 case 50:
 371                                 default:
 372                                         pcr |= SET_VCC_VPP(0,0);
 373                                         printk("%s: bad Vcc/Vpp (%d:%d)\n",
 374                                                         __func__,
 375                                                         configure->vcc,
 376                                                         configure->vpp);
 377                                         break;
 378                         }
 379                         break;
 380                 default: /* what's this ? */
 381                         pcr |= SET_VCC_VPP(0,0);
 382                         printk(KERN_ERR "%s: bad Vcc %d\n",
 383                                         __func__, configure->vcc);
 384                         break;
 385         }
 386
 387         au_writew(pcr, PCMCIA_BOARD_REG);
 388         au_sync_delay(300);
 389
 390         if (!configure->reset) {
 391                 pcr |= PC_DRV_EN;
 392                 au_writew(pcr, PCMCIA_BOARD_REG);
 393                 au_sync_delay(100);
 394                 pcr |= PC_DEASSERT_RST;
 395                 au_writew(pcr, PCMCIA_BOARD_REG);
 396                 au_sync_delay(100);
 397         }
 398         else {
 399                 pcr &= ~(PC_DEASSERT_RST | PC_DRV_EN);
 400                 au_writew(pcr, PCMCIA_BOARD_REG);
 401                 au_sync_delay(100);
 402         }
 403 #endif
 404         return 0;
 405 }
 406
 407
 408 struct pcmcia_low_level pb1x00_pcmcia_ops = {
 409         pb1x00_pcmcia_init,
 410         pb1x00_pcmcia_shutdown,
 411         pb1x00_pcmcia_socket_state,
 412         pb1x00_pcmcia_get_irq_info,
 413         pb1x00_pcmcia_configure_socket
 414 };