board/netta/pcmcia.c

   1 #include <common.h>
   2 #include <mpc8xx.h>
   3 #include <pcmcia.h>
   4
   5 #undef  CONFIG_PCMCIA
   6
   7 #if defined(CONFIG_CMD_PCMCIA)
   8 #define CONFIG_PCMCIA
   9 #endif
  10
  11 #if defined(CONFIG_CMD_IDE) && defined(CONFIG_IDE_8xx_PCCARD)
  12 #define CONFIG_PCMCIA
  13 #endif
  14
  15 #ifdef  CONFIG_PCMCIA
  16
  17 /* some sane bit macros */
  18 #define _BD(_b)                         (1U << (31-(_b)))
  19 #define _BDR(_l, _h)                    (((((1U << (31-(_l))) - 1) << 1) | 1) & ~((1U << (31-(_h))) - 1))
  20
  21 #define _BW(_b)                         (1U << (15-(_b)))
  22 #define _BWR(_l, _h)                    (((((1U << (15-(_l))) - 1) << 1) | 1) & ~((1U << (15-(_h))) - 1))
  23
  24 #define _BB(_b)                         (1U << (7-(_b)))
  25 #define _BBR(_l, _h)                    (((((1U << (7-(_l))) - 1) << 1) | 1) & ~((1U << (7-(_h))) - 1))
  26
  27 #define _B(_b)                          _BD(_b)
  28 #define _BR(_l, _h)                     _BDR(_l, _h)
  29
  30 #define PCMCIA_BOARD_MSG "NETTA"
  31
  32 static const unsigned short vppd_masks[2] = { _BW(14), _BW(15) };
  33
  34 static void cfg_vppd(int no)
  35 {
  36         volatile immap_t *immap = (immap_t *)CONFIG_SYS_IMMR;
  37         unsigned short mask;
  38
  39         if ((unsigned int)no >= sizeof(vppd_masks)/sizeof(vppd_masks[0]))
  40                 return;
  41
  42         mask = vppd_masks[no];
  43
  44         immap->im_ioport.iop_papar &= ~mask;
  45         immap->im_ioport.iop_paodr &= ~mask;
  46         immap->im_ioport.iop_padir |=  mask;
  47 }
  48
  49 static void set_vppd(int no, int what)
  50 {
  51         volatile immap_t *immap = (immap_t *)CONFIG_SYS_IMMR;
  52         unsigned short mask;
  53
  54         if ((unsigned int)no >= sizeof(vppd_masks)/sizeof(vppd_masks[0]))
  55                 return;
  56
  57         mask = vppd_masks[no];
  58
  59         if (what)
  60                 immap->im_ioport.iop_padat |= mask;
  61         else
  62                 immap->im_ioport.iop_padat &= ~mask;
  63 }
  64
  65 static const unsigned short vccd_masks[2] = { _BW(10), _BW(6) };
  66
  67 static void cfg_vccd(int no)
  68 {
  69         volatile immap_t *immap = (immap_t *)CONFIG_SYS_IMMR;
  70         unsigned short mask;
  71
  72         if ((unsigned int)no >= sizeof(vccd_masks)/sizeof(vccd_masks[0]))
  73                 return;
  74
  75         mask = vccd_masks[no];
  76
  77         immap->im_ioport.iop_papar &= ~mask;
  78         immap->im_ioport.iop_paodr &= ~mask;
  79         immap->im_ioport.iop_padir |=  mask;
  80 }
  81
  82 static void set_vccd(int no, int what)
  83 {
  84         volatile immap_t *immap = (immap_t *)CONFIG_SYS_IMMR;
  85         unsigned short mask;
  86
  87         if ((unsigned int)no >= sizeof(vccd_masks)/sizeof(vccd_masks[0]))
  88                 return;
  89
  90         mask = vccd_masks[no];
  91
  92         if (what)
  93                 immap->im_ioport.iop_padat |= mask;
  94         else
  95                 immap->im_ioport.iop_padat &= ~mask;
  96 }
  97
  98 static const unsigned short oc_mask = _BW(8);
  99
 100 static void cfg_oc(void)
 101 {
 102         volatile immap_t *immap = (immap_t *)CONFIG_SYS_IMMR;
 103         unsigned short mask = oc_mask;
 104
 105         immap->im_ioport.iop_pcdir &= ~mask;
 106         immap->im_ioport.iop_pcso  &= ~mask;
 107         immap->im_ioport.iop_pcint &= ~mask;
 108         immap->im_ioport.iop_pcpar &= ~mask;
 109 }
 110
 111 static int get_oc(void)
 112 {
 113         volatile immap_t *immap = (immap_t *)CONFIG_SYS_IMMR;
 114         unsigned short mask = oc_mask;
 115         int what;
 116
 117         what = !!(immap->im_ioport.iop_pcdat & mask);;
 118         return what;
 119 }
 120
 121 static const unsigned short shdn_mask = _BW(12);
 122
 123 static void cfg_shdn(void)
 124 {
 125         volatile immap_t *immap = (immap_t *)CONFIG_SYS_IMMR;
 126         unsigned short mask;
 127
 128         mask = shdn_mask;
 129
 130         immap->im_ioport.iop_papar &= ~mask;
 131         immap->im_ioport.iop_paodr &= ~mask;
 132         immap->im_ioport.iop_padir |=  mask;
 133 }
 134
 135 static void set_shdn(int what)
 136 {
 137         volatile immap_t *immap = (immap_t *)CONFIG_SYS_IMMR;
 138         unsigned short mask;
 139
 140         mask = shdn_mask;
 141
 142         if (what)
 143                 immap->im_ioport.iop_padat |= mask;
 144         else
 145                 immap->im_ioport.iop_padat &= ~mask;
 146 }
 147
 148 static void cfg_ports (void)
 149 {
 150         volatile immap_t        *immap;
 151         volatile cpm8xx_t       *cp;
 152
 153         immap = (immap_t *)CONFIG_SYS_IMMR;
 154         cp    = (cpm8xx_t *)(&(((immap_t *)CONFIG_SYS_IMMR)->im_cpm));
 155
 156
 157         cfg_vppd(0); cfg_vppd(1);       /* VPPD0,VPPD1 VAVPP => Hi-Z */
 158         cfg_vccd(0); cfg_vccd(1);       /* 3V and 5V off */
 159         cfg_shdn();
 160         cfg_oc();
 161
 162         /*
 163         * Configure Port A for TPS2211 PC-Card Power-Interface Switch
 164         *
 165         * Switch off all voltages, assert shutdown
 166         */
 167         set_vppd(0, 1); set_vppd(1, 1);
 168         set_vccd(0, 0); set_vccd(1, 0);
 169         set_shdn(1);
 170
 171         udelay(100000);
 172 }
 173
 174 int pcmcia_hardware_enable(int slot)
 175 {
 176         volatile immap_t        *immap;
 177         volatile cpm8xx_t       *cp;
 178         volatile pcmconf8xx_t   *pcmp;
 179         volatile sysconf8xx_t   *sysp;
 180         uint reg, pipr, mask;
 181         int i;
 182
 183         debug ("hardware_enable: " PCMCIA_BOARD_MSG " Slot %c\n", 'A'+slot);
 184
 185         udelay(10000);
 186
 187         immap = (immap_t *)CONFIG_SYS_IMMR;
 188         sysp  = (sysconf8xx_t *)(&(((immap_t *)CONFIG_SYS_IMMR)->im_siu_conf));
 189         pcmp  = (pcmconf8xx_t *)(&(((immap_t *)CONFIG_SYS_IMMR)->im_pcmcia));
 190         cp    = (cpm8xx_t *)(&(((immap_t *)CONFIG_SYS_IMMR)->im_cpm));
 191
 192         /* Configure Ports for TPS2211A PC-Card Power-Interface Switch */
 193         cfg_ports ();
 194
 195         /* clear interrupt state, and disable interrupts */
 196         pcmp->pcmc_pscr =  PCMCIA_MASK(_slot_);
 197         pcmp->pcmc_per &= ~PCMCIA_MASK(_slot_);
 198
 199         /*
 200         * Disable interrupts, DMA, and PCMCIA buffers
 201         * (isolate the interface) and assert RESET signal
 202         */
 203         debug ("Disable PCMCIA buffers and assert RESET\n");
 204         reg  = 0;
 205         reg |= __MY_PCMCIA_GCRX_CXRESET;        /* active high */
 206         reg |= __MY_PCMCIA_GCRX_CXOE;           /* active low  */
 207         PCMCIA_PGCRX(_slot_) = reg;
 208
 209         udelay(500);
 210
 211         /*
 212         * Make sure there is a card in the slot, then configure the interface.
 213         */
 214         udelay(10000);
 215         debug ("[%d] %s: PIPR(%p)=0x%x\n",
 216                __LINE__,__FUNCTION__,
 217                &(pcmp->pcmc_pipr),pcmp->pcmc_pipr);
 218         if (pcmp->pcmc_pipr & (0x18000000 >> (slot << 4))) {
 219                 printf ("   No Card found\n");
 220                 return (1);
 221         }
 222
 223         /*
 224         * Power On: Set VAVCC to 3.3V or 5V, set VAVPP to Hi-Z
 225         */
 226         mask = PCMCIA_VS1(slot) | PCMCIA_VS2(slot);
 227         pipr = pcmp->pcmc_pipr;
 228         debug ("PIPR: 0x%x ==> VS1=o%s, VS2=o%s\n",
 229                pipr,
 230                (reg&PCMCIA_VS1(slot))?"n":"ff",
 231                (reg&PCMCIA_VS2(slot))?"n":"ff");
 232
 233         if ((pipr & mask) == mask) {
 234                 set_vppd(0, 1); set_vppd(1, 1);         /* VAVPP => Hi-Z */
 235                 set_vccd(0, 0); set_vccd(1, 1);         /* 5V on, 3V off */
 236                 puts (" 5.0V card found: ");
 237         } else {
 238                 set_vppd(0, 1); set_vppd(1, 1);         /* VAVPP => Hi-Z */
 239                 set_vccd(0, 1); set_vccd(1, 0);         /* 5V off, 3V on */
 240                 puts (" 3.3V card found: ");
 241         }
 242
 243         /*  Wait 500 ms; use this to check for over-current */
 244         for (i=0; i<5000; ++i) {
 245                 if (!get_oc()) {
 246                         printf ("   *** Overcurrent - Safety shutdown ***\n");
 247                         set_vccd(0, 0); set_vccd(1, 0);         /* VAVPP => Hi-Z */
 248                         return (1);
 249                 }
 250                 udelay (100);
 251         }
 252
 253         debug ("Enable PCMCIA buffers and stop RESET\n");
 254         reg  =  PCMCIA_PGCRX(_slot_);
 255         reg &= ~__MY_PCMCIA_GCRX_CXRESET;       /* active high */
 256         reg &= ~__MY_PCMCIA_GCRX_CXOE;          /* active low  */
 257         PCMCIA_PGCRX(_slot_) = reg;
 258
 259         udelay(250000); /* some cards need >150 ms to come up :-( */
 260
 261         debug ("# hardware_enable done\n");
 262
 263         return (0);
 264 }
 265
 266
 267 #if defined(CONFIG_CMD_PCMCIA)
 268 int pcmcia_hardware_disable(int slot)
 269 {
 270         volatile immap_t        *immap;
 271         volatile pcmconf8xx_t   *pcmp;
 272         u_long reg;
 273
 274         debug ("hardware_disable: " PCMCIA_BOARD_MSG " Slot %c\n", 'A'+slot);
 275
 276         immap = (immap_t *)CONFIG_SYS_IMMR;
 277         pcmp  = (pcmconf8xx_t *)(&(((immap_t *)CONFIG_SYS_IMMR)->im_pcmcia));
 278
 279         /* Configure PCMCIA General Control Register */
 280         debug ("Disable PCMCIA buffers and assert RESET\n");
 281         reg  = 0;
 282         reg |= __MY_PCMCIA_GCRX_CXRESET;        /* active high */
 283         reg |= __MY_PCMCIA_GCRX_CXOE;           /* active low  */
 284         PCMCIA_PGCRX(_slot_) = reg;
 285
 286         /* All voltages off / Hi-Z */
 287         set_vppd(0, 1); set_vppd(1, 1);
 288         set_vccd(0, 1); set_vccd(1, 1);
 289
 290         udelay(10000);
 291
 292         return (0);
 293 }
 294 #endif
 295
 296
 297 int pcmcia_voltage_set(int slot, int vcc, int vpp)
 298 {
 299         volatile immap_t        *immap;
 300         volatile cpm8xx_t       *cp;
 301         volatile pcmconf8xx_t   *pcmp;
 302         u_long reg;
 303         ushort sreg;
 304
 305         debug ("voltage_set: "
 306                         PCMCIA_BOARD_MSG
 307                         " Slot %c, Vcc=%d.%d, Vpp=%d.%d\n",
 308         'A'+slot, vcc/10, vcc%10, vpp/10, vcc%10);
 309
 310         immap = (immap_t *)CONFIG_SYS_IMMR;
 311         cp    = (cpm8xx_t *)(&(((immap_t *)CONFIG_SYS_IMMR)->im_cpm));
 312         pcmp  = (pcmconf8xx_t *)(&(((immap_t *)CONFIG_SYS_IMMR)->im_pcmcia));
 313         /*
 314         * Disable PCMCIA buffers (isolate the interface)
 315         * and assert RESET signal
 316         */
 317         debug ("Disable PCMCIA buffers and assert RESET\n");
 318         reg  = PCMCIA_PGCRX(_slot_);
 319         reg |= __MY_PCMCIA_GCRX_CXRESET;        /* active high */
 320         reg |= __MY_PCMCIA_GCRX_CXOE;           /* active low  */
 321         PCMCIA_PGCRX(_slot_) = reg;
 322         udelay(500);
 323
 324         /*
 325         * Configure Port C pins for
 326         * 5 Volts Enable and 3 Volts enable,
 327         * Turn all power pins to Hi-Z
 328         */
 329         debug ("PCMCIA power OFF\n");
 330         cfg_ports ();   /* Enables switch, but all in Hi-Z */
 331
 332         sreg  = immap->im_ioport.iop_pcdat;
 333         set_vppd(0, 1); set_vppd(1, 1);
 334
 335         switch(vcc) {
 336                 case  0:
 337                         break;  /* Switch off           */
 338
 339                 case 33:
 340                         set_vccd(0, 1); set_vccd(1, 0);
 341                         break;
 342
 343                 case 50:
 344                         set_vccd(0, 0); set_vccd(1, 1);
 345                         break;
 346
 347                 default:
 348                         goto done;
 349         }
 350
 351         /* Checking supported voltages */
 352
 353         debug ("PIPR: 0x%x --> %s\n",
 354                pcmp->pcmc_pipr,
 355                (pcmp->pcmc_pipr & 0x00008000) ? "only 5 V" : "can do 3.3V");
 356
 357 done:
 358                         debug ("Enable PCMCIA buffers and stop RESET\n");
 359         reg  =  PCMCIA_PGCRX(_slot_);
 360         reg &= ~__MY_PCMCIA_GCRX_CXRESET;       /* active high */
 361         reg &= ~__MY_PCMCIA_GCRX_CXOE;          /* active low  */
 362         PCMCIA_PGCRX(_slot_) = reg;
 363         udelay(500);
 364
 365         debug ("voltage_set: " PCMCIA_BOARD_MSG " Slot %c, DONE\n",
 366                slot+'A');
 367         return (0);
 368 }
 369
 370 #endif  /* CONFIG_PCMCIA */