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/version.h>
  34 #include <linux/types.h>
  35
  36 #include <pcmcia/version.h>
  37 #include <pcmcia/cs_types.h>
  38 #include <pcmcia/cs.h>
  39 #include <pcmcia/ss.h>
  40 #include <pcmcia/bulkmem.h>
  41 #include <pcmcia/cistpl.h>
  42 #include <pcmcia/bus_ops.h>
  43 #include "cs_internal.h"
  44
  45 #include <asm/io.h>
  46 #include <asm/irq.h>
  47 #include <asm/system.h>
  48
  49 #include <asm/au1000.h>
  50 #include <asm/au1000_pcmcia.h>
  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 AU1000_GPIO_11   /* fixme */
  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(PB1100_MEM_PCMCIA) & ~0xf; /* turn off power */
  85         pcr &= ~(PB1100_PC_DEASSERT_RST | PB1100_PC_DRV_EN);
  86         au_writew(pcr, PB1100_MEM_PCMCIA);
  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(PB1100_MEM_PCMCIA) & ~0xf; /* turn off power */
 105         pcr &= ~(PB1100_PC_DEASSERT_RST | PB1100_PC_DRV_EN);
 106         au_writew(pcr, PB1100_MEM_PCMCIA);
 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(PB1100_BOARD_STATUS) >> 4) & 0x3;
 126         inserted0 = !((au_readl(SYS_PINSTATERD) >> 9) & 0x1); /* gpio 9 */
 127 #endif
 128
 129         state->ready = 0;
 130         state->vs_Xv = 0;
 131         state->vs_3v = 0;
 132         state->detect = 0;
 133
 134         if (sock == 0) {
 135                 if (inserted0) {
 136                         switch (vs0) {
 137                                 case 0:
 138                                 case 2:
 139                                         state->vs_3v=1;
 140                                         break;
 141                                 case 3: /* 5V */
 142                                         break;
 143                                 default:
 144                                         /* return without setting 'detect' */
 145                                         printk(KERN_ERR "pb1x00 bad VS (%d)\n",
 146                                                         vs0);
 147                                         return;
 148                         }
 149                         state->detect = 1;
 150                 }
 151         }
 152         else  {
 153                 if (inserted1) {
 154                         switch (vs1) {
 155                                 case 0:
 156                                 case 2:
 157                                         state->vs_3v=1;
 158                                         break;
 159                                 case 3: /* 5V */
 160                                         break;
 161                                 default:
 162                                         /* return without setting 'detect' */
 163                                         printk(KERN_ERR "pb1x00 bad VS (%d)\n",
 164                                                         vs1);
 165                                         return;
 166                         }
 167                         state->detect = 1;
 168                 }
 169         }
 170
 171         if (state->detect) {
 172                 state->ready = 1;
 173         }
 174
 175         state->bvd1=1;
 176         state->bvd2=1;
 177         state->wrprot=0;
 178         return 1;
 179 }
 180
 181
 182 static int pb1x00_pcmcia_get_irq_info(struct pcmcia_irq_info *info)
 183 {
 184
 185         if(info->sock > PCMCIA_MAX_SOCK) return -1;
 186
 187         /*
 188          * Even in the case of the Pb1000, both sockets are connected
 189          * to the same irq line.
 190          */
 191         info->irq = PCMCIA_IRQ;
 192
 193         return 0;
 194 }
 195
 196
 197 static int
 198 pb1x00_pcmcia_configure_socket(const struct pcmcia_configure *configure)
 199 {
 200         u16 pcr;
 201
 202         if(configure->sock > PCMCIA_MAX_SOCK) return -1;
 203
 204 #ifdef CONFIG_MIPS_PB1000
 205         pcr = au_readl(PB1000_PCR);
 206
 207         if (configure->sock == 0) {
 208                 pcr &= ~(PCR_SLOT_0_VCC0 | PCR_SLOT_0_VCC1 |
 209                                 PCR_SLOT_0_VPP0 | PCR_SLOT_0_VPP1);
 210         }
 211         else  {
 212                 pcr &= ~(PCR_SLOT_1_VCC0 | PCR_SLOT_1_VCC1 |
 213                                 PCR_SLOT_1_VPP0 | PCR_SLOT_1_VPP1);
 214         }
 215
 216         pcr &= ~PCR_SLOT_0_RST;
 217         DEBUG(KERN_INFO "Vcc %dV Vpp %dV, pcr %x\n",
 218                         configure->vcc, configure->vpp, pcr);
 219         switch(configure->vcc){
 220                 case 0:  /* Vcc 0 */
 221                         switch(configure->vpp) {
 222                                 case 0:
 223                                         pcr |= SET_VCC_VPP(VCC_HIZ,VPP_GND,
 224                                                         configure->sock);
 225                                         break;
 226                                 case 12:
 227                                         pcr |= SET_VCC_VPP(VCC_HIZ,VPP_12V,
 228                                                         configure->sock);
 229                                         break;
 230                                 case 50:
 231                                         pcr |= SET_VCC_VPP(VCC_HIZ,VPP_5V,
 232                                                         configure->sock);
 233                                         break;
 234                                 case 33:
 235                                         pcr |= SET_VCC_VPP(VCC_HIZ,VPP_3V,
 236                                                         configure->sock);
 237                                         break;
 238                                 default:
 239                                         pcr |= SET_VCC_VPP(VCC_HIZ,VPP_HIZ,
 240                                                         configure->sock);
 241                                         printk("%s: bad Vcc/Vpp (%d:%d)\n",
 242                                                         __FUNCTION__,
 243                                                         configure->vcc,
 244                                                         configure->vpp);
 245                                         break;
 246                         }
 247                         break;
 248                 case 50: /* Vcc 5V */
 249                         switch(configure->vpp) {
 250                                 case 0:
 251                                         pcr |= SET_VCC_VPP(VCC_5V,VPP_GND,
 252                                                         configure->sock);
 253                                         break;
 254                                 case 50:
 255                                         pcr |= SET_VCC_VPP(VCC_5V,VPP_5V,
 256                                                         configure->sock);
 257                                         break;
 258                                 case 12:
 259                                         pcr |= SET_VCC_VPP(VCC_5V,VPP_12V,
 260                                                         configure->sock);
 261                                         break;
 262                                 case 33:
 263                                         pcr |= SET_VCC_VPP(VCC_5V,VPP_3V,
 264                                                         configure->sock);
 265                                         break;
 266                                 default:
 267                                         pcr |= SET_VCC_VPP(VCC_HIZ,VPP_HIZ,
 268                                                         configure->sock);
 269                                         printk("%s: bad Vcc/Vpp (%d:%d)\n",
 270                                                         __FUNCTION__,
 271                                                         configure->vcc,
 272                                                         configure->vpp);
 273                                         break;
 274                         }
 275                         break;
 276                 case 33: /* Vcc 3.3V */
 277                         switch(configure->vpp) {
 278                                 case 0:
 279                                         pcr |= SET_VCC_VPP(VCC_3V,VPP_GND,
 280                                                         configure->sock);
 281                                         break;
 282                                 case 50:
 283                                         pcr |= SET_VCC_VPP(VCC_3V,VPP_5V,
 284                                                         configure->sock);
 285                                         break;
 286                                 case 12:
 287                                         pcr |= SET_VCC_VPP(VCC_3V,VPP_12V,
 288                                                         configure->sock);
 289                                         break;
 290                                 case 33:
 291                                         pcr |= SET_VCC_VPP(VCC_3V,VPP_3V,
 292                                                         configure->sock);
 293                                         break;
 294                                 default:
 295                                         pcr |= SET_VCC_VPP(VCC_HIZ,VPP_HIZ,
 296                                                         configure->sock);
 297                                         printk("%s: bad Vcc/Vpp (%d:%d)\n",
 298                                                         __FUNCTION__,
 299                                                         configure->vcc,
 300                                                         configure->vpp);
 301                                         break;
 302                         }
 303                         break;
 304                 default: /* what's this ? */
 305                         pcr |= SET_VCC_VPP(VCC_HIZ,VPP_HIZ,configure->sock);
 306                         printk(KERN_ERR "%s: bad Vcc %d\n",
 307                                         __FUNCTION__, configure->vcc);
 308                         break;
 309         }
 310
 311         if (configure->sock == 0) {
 312         pcr &= ~(PCR_SLOT_0_RST);
 313                 if (configure->reset)
 314                 pcr |= PCR_SLOT_0_RST;
 315         }
 316         else {
 317                 pcr &= ~(PCR_SLOT_1_RST);
 318                 if (configure->reset)
 319                         pcr |= PCR_SLOT_1_RST;
 320         }
 321         au_writel(pcr, PB1000_PCR);
 322         au_sync_delay(300);
 323
 324 #else
 325
 326         pcr = au_readw(PB1100_MEM_PCMCIA) & ~0xf;
 327
 328         DEBUG(KERN_INFO "Vcc %dV Vpp %dV, pcr %x, reset %d\n",
 329                         configure->vcc, configure->vpp, pcr, configure->reset);
 330
 331
 332         switch(configure->vcc){
 333                 case 0:  /* Vcc 0 */
 334                         pcr |= SET_VCC_VPP(0,0);
 335                         break;
 336                 case 50: /* Vcc 5V */
 337                         switch(configure->vpp) {
 338                                 case 0:
 339                                         pcr |= SET_VCC_VPP(2,0);
 340                                         break;
 341                                 case 50:
 342                                         pcr |= SET_VCC_VPP(2,1);
 343                                         break;
 344                                 case 12:
 345                                         pcr |= SET_VCC_VPP(2,2);
 346                                         break;
 347                                 case 33:
 348                                 default:
 349                                         pcr |= SET_VCC_VPP(0,0);
 350                                         printk("%s: bad Vcc/Vpp (%d:%d)\n",
 351                                                         __FUNCTION__,
 352                                                         configure->vcc,
 353                                                         configure->vpp);
 354                                         break;
 355                         }
 356                         break;
 357                 case 33: /* Vcc 3.3V */
 358                         switch(configure->vpp) {
 359                                 case 0:
 360                                         pcr |= SET_VCC_VPP(1,0);
 361                                         break;
 362                                 case 12:
 363                                         pcr |= SET_VCC_VPP(1,2);
 364                                         break;
 365                                 case 33:
 366                                         pcr |= SET_VCC_VPP(1,1);
 367                                         break;
 368                                 case 50:
 369                                 default:
 370                                         pcr |= SET_VCC_VPP(0,0);
 371                                         printk("%s: bad Vcc/Vpp (%d:%d)\n",
 372                                                         __FUNCTION__,
 373                                                         configure->vcc,
 374                                                         configure->vpp);
 375                                         break;
 376                         }
 377                         break;
 378                 default: /* what's this ? */
 379                         pcr |= SET_VCC_VPP(0,0);
 380                         printk(KERN_ERR "%s: bad Vcc %d\n",
 381                                         __FUNCTION__, configure->vcc);
 382                         break;
 383         }
 384
 385         au_writew(pcr, PB1100_MEM_PCMCIA);
 386         au_sync_delay(300);
 387
 388         if (!configure->reset) {
 389                 pcr |= PB1100_PC_DRV_EN;
 390                 au_writew(pcr, PB1100_MEM_PCMCIA);
 391                 au_sync_delay(100);
 392                 pcr |= PB1100_PC_DEASSERT_RST;
 393                 au_writew(pcr, PB1100_MEM_PCMCIA);
 394                 au_sync_delay(100);
 395         }
 396         else {
 397                 pcr &= ~(PB1100_PC_DEASSERT_RST | PB1100_PC_DRV_EN);
 398                 au_writew(pcr, PB1100_MEM_PCMCIA);
 399                 au_sync_delay(100);
 400         }
 401 #endif
 402         return 0;
 403 }
 404
 405 struct pcmcia_low_level pb1x00_pcmcia_ops = {
 406         pb1x00_pcmcia_init,
 407         pb1x00_pcmcia_shutdown,
 408         pb1x00_pcmcia_socket_state,
 409         pb1x00_pcmcia_get_irq_info,
 410         pb1x00_pcmcia_configure_socket
 411 };