drivers/mpc8xx_pcmcia.c

   1 #include <common.h>
   2 #if defined(CONFIG_8xx)
   3 #include <mpc8xx.h>
   4 #endif
   5 #include <pcmcia.h>
   6
   7 #undef  CONFIG_PCMCIA
   8
   9 #if     (CONFIG_COMMANDS & CFG_CMD_PCMCIA)
  10 #define CONFIG_PCMCIA
  11 #endif
  12
  13 #if     (CONFIG_COMMANDS & CFG_CMD_IDE) && defined(CONFIG_IDE_8xx_PCCARD)
  14 #define CONFIG_PCMCIA
  15 #endif
  16
  17 #if defined(CONFIG_8xx) && defined(CONFIG_PCMCIA)
  18
  19 #if     defined(CONFIG_IDE_8xx_PCCARD)
  20 extern int check_ide_device (int slot);
  21 #endif
  22
  23 extern int pcmcia_hardware_enable (int slot);
  24 extern int pcmcia_voltage_set(int slot, int vcc, int vpp);
  25
  26 #if     (CONFIG_COMMANDS & CFG_CMD_PCMCIA)
  27 extern int pcmcia_hardware_disable(int slot);
  28 #endif
  29
  30 static u_int m8xx_get_graycode(u_int size);
  31 #if 0 /* Disabled */
  32 static u_int m8xx_get_speed(u_int ns, u_int is_io);
  33 #endif
  34
  35 /* look up table for pgcrx registers */
  36 u_int *pcmcia_pgcrx[2] = {
  37         &((immap_t *)CFG_IMMR)->im_pcmcia.pcmc_pgcra,
  38         &((immap_t *)CFG_IMMR)->im_pcmcia.pcmc_pgcrb,
  39 };
  40
  41 /*
  42  * Search this table to see if the windowsize is
  43  * supported...
  44  */
  45
  46 #define M8XX_SIZES_NO 32
  47
  48 static const u_int m8xx_size_to_gray[M8XX_SIZES_NO] =
  49 { 0x00000001, 0x00000002, 0x00000008, 0x00000004,
  50   0x00000080, 0x00000040, 0x00000010, 0x00000020,
  51   0x00008000, 0x00004000, 0x00001000, 0x00002000,
  52   0x00000100, 0x00000200, 0x00000800, 0x00000400,
  53
  54   0x0fffffff, 0xffffffff, 0xffffffff, 0xffffffff,
  55   0x01000000, 0x02000000, 0xffffffff, 0x04000000,
  56   0x00010000, 0x00020000, 0x00080000, 0x00040000,
  57   0x00800000, 0x00400000, 0x00100000, 0x00200000 };
  58
  59
  60 /* -------------------------------------------------------------------- */
  61
  62 #ifdef  CONFIG_HMI10
  63 #define HMI10_FRAM_TIMING       (       PCMCIA_SHT(2)   \
  64                                 |       PCMCIA_SST(2)   \
  65                                 |       PCMCIA_SL(4))
  66 #endif
  67
  68 #if     defined(CONFIG_LWMON) || defined(CONFIG_NSCU)
  69 #define CFG_PCMCIA_TIMING       (       PCMCIA_SHT(9)   \
  70                                 |       PCMCIA_SST(3)   \
  71                                 |       PCMCIA_SL(12))
  72 #else
  73 #define CFG_PCMCIA_TIMING       (       PCMCIA_SHT(2)   \
  74                                 |       PCMCIA_SST(4)   \
  75                                 |       PCMCIA_SL(9))
  76 #endif
  77
  78 /* -------------------------------------------------------------------- */
  79
  80 int pcmcia_on (void)
  81 {
  82         u_long reg, base;
  83         pcmcia_win_t *win;
  84         u_int slotbit;
  85         u_int rc, slot;
  86         int i;
  87
  88         debug ("Enable PCMCIA " PCMCIA_SLOT_MSG "\n");
  89
  90         /* intialize the fixed memory windows */
  91         win = (pcmcia_win_t *)(&((immap_t *)CFG_IMMR)->im_pcmcia.pcmc_pbr0);
  92         base = CFG_PCMCIA_MEM_ADDR;
  93
  94         if((reg = m8xx_get_graycode(CFG_PCMCIA_MEM_SIZE)) == -1) {
  95                 printf ("Cannot set window size to 0x%08x\n",
  96                         CFG_PCMCIA_MEM_SIZE);
  97                 return (1);
  98         }
  99
 100         slotbit = PCMCIA_SLOT_x;
 101         for (i=0; i<PCMCIA_MEM_WIN_NO; ++i) {
 102                 win->br = base;
 103
 104 #if     (PCMCIA_SOCKETS_NO == 2)
 105                 if (i == 4) /* Another slot starting from win 4 */
 106                         slotbit = (slotbit ? PCMCIA_PSLOT_A : PCMCIA_PSLOT_B);
 107 #endif
 108                 switch (i) {
 109 #ifdef  CONFIG_IDE_8xx_PCCARD
 110                 case 4:
 111 #ifdef  CONFIG_HMI10
 112                 {       /* map FRAM area */
 113                         win->or = (     PCMCIA_BSIZE_256K
 114                                 |       PCMCIA_PPS_8
 115                                 |       PCMCIA_PRS_ATTR
 116                                 |       slotbit
 117                                 |       PCMCIA_PV
 118                                 |       HMI10_FRAM_TIMING );
 119                         break;
 120                 }
 121 #endif
 122                 case 0: {       /* map attribute memory */
 123                         win->or = (     PCMCIA_BSIZE_64M
 124                                 |       PCMCIA_PPS_8
 125                                 |       PCMCIA_PRS_ATTR
 126                                 |       slotbit
 127                                 |       PCMCIA_PV
 128                                 |       CFG_PCMCIA_TIMING );
 129                         break;
 130                 }
 131                 case 5:
 132                 case 1: {       /* map I/O window for data reg */
 133                         win->or = (     PCMCIA_BSIZE_1K
 134                                 |       PCMCIA_PPS_16
 135                                 |       PCMCIA_PRS_IO
 136                                 |       slotbit
 137                                 |       PCMCIA_PV
 138                                 |       CFG_PCMCIA_TIMING );
 139                         break;
 140                 }
 141                 case 6:
 142                 case 2: {       /* map I/O window for cmd/ctrl reg block */
 143                         win->or = (     PCMCIA_BSIZE_1K
 144                                 |       PCMCIA_PPS_8
 145                                 |       PCMCIA_PRS_IO
 146                                 |       slotbit
 147                                 |       PCMCIA_PV
 148                                 |       CFG_PCMCIA_TIMING );
 149                         break;
 150                 }
 151 #endif  /* CONFIG_IDE_8xx_PCCARD */
 152 #ifdef  CONFIG_HMI10
 153                 case 3: {       /* map I/O window for 4xUART data/ctrl */
 154                         win->br += 0x40000;
 155                         win->or = (     PCMCIA_BSIZE_256K
 156                                 |       PCMCIA_PPS_8
 157                                 |       PCMCIA_PRS_IO
 158                                 |       slotbit
 159                                 |       PCMCIA_PV
 160                                 |       CFG_PCMCIA_TIMING );
 161                         break;
 162                 }
 163 #endif  /* CONFIG_HMI10 */
 164                 default:        /* set to not valid */
 165                         win->or = 0;
 166                         break;
 167                 }
 168
 169                 debug ("MemWin %d: PBR 0x%08lX  POR %08lX\n",
 170                        i, win->br, win->or);
 171                 base += CFG_PCMCIA_MEM_SIZE;
 172                 ++win;
 173         }
 174
 175         for (i=0, rc=0, slot=_slot_; i<PCMCIA_SOCKETS_NO; i++, slot = !slot) {
 176                 /* turn off voltage */
 177                 if ((rc = pcmcia_voltage_set(slot, 0, 0)))
 178                         continue;
 179
 180                 /* Enable external hardware */
 181                 if ((rc = pcmcia_hardware_enable(slot)))
 182                         continue;
 183
 184 #ifdef  CONFIG_IDE_8xx_PCCARD
 185                 if ((rc = check_ide_device(i)))
 186                         continue;
 187 #endif
 188         }
 189         return rc;
 190 }
 191
 192 #if     (CONFIG_COMMANDS & CFG_CMD_PCMCIA)
 193 int pcmcia_off (void)
 194 {
 195         int i;
 196         pcmcia_win_t *win;
 197
 198         printf ("Disable PCMCIA " PCMCIA_SLOT_MSG "\n");
 199
 200         /* clear interrupt state, and disable interrupts */
 201         ((immap_t *)CFG_IMMR)->im_pcmcia.pcmc_pscr =  PCMCIA_MASK(_slot_);
 202         ((immap_t *)CFG_IMMR)->im_pcmcia.pcmc_per &= ~PCMCIA_MASK(_slot_);
 203
 204         /* turn off interrupt and disable CxOE */
 205         PCMCIA_PGCRX(_slot_) = __MY_PCMCIA_GCRX_CXOE;
 206
 207         /* turn off memory windows */
 208         win = (pcmcia_win_t *)(&((immap_t *)CFG_IMMR)->im_pcmcia.pcmc_pbr0);
 209
 210         for (i=0; i<PCMCIA_MEM_WIN_NO; ++i) {
 211                 /* disable memory window */
 212                 win->or = 0;
 213                 ++win;
 214         }
 215
 216         /* turn off voltage */
 217         pcmcia_voltage_set(_slot_, 0, 0);
 218
 219         /* disable external hardware */
 220         printf ("Shutdown and Poweroff " PCMCIA_SLOT_MSG "\n");
 221         pcmcia_hardware_disable(_slot_);
 222         return 0;
 223 }
 224 #endif  /* CFG_CMD_PCMCIA */
 225
 226
 227 static u_int m8xx_get_graycode(u_int size)
 228 {
 229         u_int k;
 230
 231         for (k = 0; k < M8XX_SIZES_NO; k++) {
 232                 if(m8xx_size_to_gray[k] == size)
 233                         break;
 234         }
 235
 236         if((k == M8XX_SIZES_NO) || (m8xx_size_to_gray[k] == -1))
 237                 k = -1;
 238
 239         return k;
 240 }
 241
 242 #if     0
 243
 244 #if     defined(CONFIG_RPXCLASSIC) || defined(CONFIG_RPXLITE)
 245
 246 /* The RPX boards seems to have it's bus monitor timeout set to 6*8 clocks.
 247  * SYPCR is write once only, therefore must the slowest memory be faster
 248  * than the bus monitor or we will get a machine check due to the bus timeout.
 249  */
 250 #undef  PCMCIA_BMT_LIMIT
 251 #define PCMCIA_BMT_LIMIT (6*8)
 252 #endif
 253
 254 static u_int m8xx_get_speed(u_int ns, u_int is_io)
 255 {
 256         u_int reg, clocks, psst, psl, psht;
 257
 258         if(!ns) {
 259
 260                 /*
 261                 * We get called with IO maps setup to 0ns
 262                 * if not specified by the user.
 263                 * They should be 255ns.
 264                 */
 265
 266                 if(is_io)
 267                         ns = 255;
 268                 else
 269                         ns = 100;  /* fast memory if 0 */
 270         }
 271
 272         /*
 273         * In PSST, PSL, PSHT fields we tell the controller
 274         * timing parameters in CLKOUT clock cycles.
 275         * CLKOUT is the same as GCLK2_50.
 276         */
 277
 278         /* how we want to adjust the timing - in percent */
 279
 280 #define ADJ 180 /* 80 % longer accesstime - to be sure */
 281
 282         clocks = ((M8XX_BUSFREQ / 1000) * ns) / 1000;
 283         clocks = (clocks * ADJ) / (100*1000);
 284
 285         if(clocks >= PCMCIA_BMT_LIMIT) {
 286                 DEBUG(0, "Max access time limit reached\n");
 287                 clocks = PCMCIA_BMT_LIMIT-1;
 288         }
 289
 290         psst = clocks / 7;          /* setup time */
 291         psht = clocks / 7;          /* hold time */
 292         psl  = (clocks * 5) / 7;    /* strobe length */
 293
 294         psst += clocks - (psst + psht + psl);
 295
 296         reg =  psst << 12;
 297         reg |= psl  << 7;
 298         reg |= psht << 16;
 299
 300         return reg;
 301 }
 302 #endif  /* 0 */
 303
 304 #endif  /* CONFIG_8xx && CONFIG_PCMCIA */