drivers/pcmcia/mpc8xx_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 #if defined(CONFIG_PCMCIA)
  16
  17 #if     defined(CONFIG_IDE_8xx_PCCARD)
  18 extern int check_ide_device (int slot);
  19 #endif
  20
  21 extern int pcmcia_hardware_enable (int slot);
  22 extern int pcmcia_voltage_set(int slot, int vcc, int vpp);
  23
  24 #if defined(CONFIG_CMD_PCMCIA)
  25 extern int pcmcia_hardware_disable(int slot);
  26 #endif
  27
  28 static u_int m8xx_get_graycode(u_int size);
  29 #if 0 /* Disabled */
  30 static u_int m8xx_get_speed(u_int ns, u_int is_io);
  31 #endif
  32
  33 /* look up table for pgcrx registers */
  34 u_int *pcmcia_pgcrx[2] = {
  35         &((immap_t *)CONFIG_SYS_IMMR)->im_pcmcia.pcmc_pgcra,
  36         &((immap_t *)CONFIG_SYS_IMMR)->im_pcmcia.pcmc_pgcrb,
  37 };
  38
  39 /*
  40  * Search this table to see if the windowsize is
  41  * supported...
  42  */
  43
  44 #define M8XX_SIZES_NO 32
  45
  46 static const u_int m8xx_size_to_gray[M8XX_SIZES_NO] =
  47 { 0x00000001, 0x00000002, 0x00000008, 0x00000004,
  48   0x00000080, 0x00000040, 0x00000010, 0x00000020,
  49   0x00008000, 0x00004000, 0x00001000, 0x00002000,
  50   0x00000100, 0x00000200, 0x00000800, 0x00000400,
  51
  52   0x0fffffff, 0xffffffff, 0xffffffff, 0xffffffff,
  53   0x01000000, 0x02000000, 0xffffffff, 0x04000000,
  54   0x00010000, 0x00020000, 0x00080000, 0x00040000,
  55   0x00800000, 0x00400000, 0x00100000, 0x00200000 };
  56
  57
  58 /* -------------------------------------------------------------------- */
  59
  60 #ifdef  CONFIG_HMI10
  61 #define HMI10_FRAM_TIMING       (       PCMCIA_SHT(2)   \
  62                                 |       PCMCIA_SST(2)   \
  63                                 |       PCMCIA_SL(4))
  64 #endif
  65
  66 #if     defined(CONFIG_LWMON) || defined(CONFIG_NSCU)
  67 #define CONFIG_SYS_PCMCIA_TIMING        (       PCMCIA_SHT(9)   \
  68                                 |       PCMCIA_SST(3)   \
  69                                 |       PCMCIA_SL(12))
  70 #else
  71 #define CONFIG_SYS_PCMCIA_TIMING        (       PCMCIA_SHT(2)   \
  72                                 |       PCMCIA_SST(4)   \
  73                                 |       PCMCIA_SL(9))
  74 #endif
  75
  76 /* -------------------------------------------------------------------- */
  77
  78 int pcmcia_on (void)
  79 {
  80         u_long reg, base;
  81         pcmcia_win_t *win;
  82         u_int slotbit;
  83         u_int rc, slot;
  84         int i;
  85
  86         debug ("Enable PCMCIA " PCMCIA_SLOT_MSG "\n");
  87
  88         /* intialize the fixed memory windows */
  89         win = (pcmcia_win_t *)(&((immap_t *)CONFIG_SYS_IMMR)->im_pcmcia.pcmc_pbr0);
  90         base = CONFIG_SYS_PCMCIA_MEM_ADDR;
  91
  92         if((reg = m8xx_get_graycode(CONFIG_SYS_PCMCIA_MEM_SIZE)) == -1) {
  93                 printf ("Cannot set window size to 0x%08x\n",
  94                         CONFIG_SYS_PCMCIA_MEM_SIZE);
  95                 return (1);
  96         }
  97
  98         slotbit = PCMCIA_SLOT_x;
  99         for (i=0; i<PCMCIA_MEM_WIN_NO; ++i) {
 100                 win->br = base;
 101
 102 #if     (PCMCIA_SOCKETS_NO == 2)
 103                 if (i == 4) /* Another slot starting from win 4 */
 104                         slotbit = (slotbit ? PCMCIA_PSLOT_A : PCMCIA_PSLOT_B);
 105 #endif
 106                 switch (i) {
 107 #ifdef  CONFIG_IDE_8xx_PCCARD
 108                 case 4:
 109 #ifdef  CONFIG_HMI10
 110                 {       /* map FRAM area */
 111                         win->or = (     PCMCIA_BSIZE_256K
 112                                 |       PCMCIA_PPS_8
 113                                 |       PCMCIA_PRS_ATTR
 114                                 |       slotbit
 115                                 |       PCMCIA_PV
 116                                 |       HMI10_FRAM_TIMING );
 117                         break;
 118                 }
 119 #endif
 120                 case 0: {       /* map attribute memory */
 121                         win->or = (     PCMCIA_BSIZE_64M
 122                                 |       PCMCIA_PPS_8
 123                                 |       PCMCIA_PRS_ATTR
 124                                 |       slotbit
 125                                 |       PCMCIA_PV
 126                                 |       CONFIG_SYS_PCMCIA_TIMING );
 127                         break;
 128                 }
 129                 case 5:
 130                 case 1: {       /* map I/O window for data reg */
 131                         win->or = (     PCMCIA_BSIZE_1K
 132                                 |       PCMCIA_PPS_16
 133                                 |       PCMCIA_PRS_IO
 134                                 |       slotbit
 135                                 |       PCMCIA_PV
 136                                 |       CONFIG_SYS_PCMCIA_TIMING );
 137                         break;
 138                 }
 139                 case 6:
 140                 case 2: {       /* map I/O window for cmd/ctrl reg block */
 141                         win->or = (     PCMCIA_BSIZE_1K
 142                                 |       PCMCIA_PPS_8
 143                                 |       PCMCIA_PRS_IO
 144                                 |       slotbit
 145                                 |       PCMCIA_PV
 146                                 |       CONFIG_SYS_PCMCIA_TIMING );
 147                         break;
 148                 }
 149 #endif  /* CONFIG_IDE_8xx_PCCARD */
 150 #ifdef  CONFIG_HMI10
 151                 case 3: {       /* map I/O window for 4xUART data/ctrl */
 152                         win->br += 0x40000;
 153                         win->or = (     PCMCIA_BSIZE_256K
 154                                 |       PCMCIA_PPS_8
 155                                 |       PCMCIA_PRS_IO
 156                                 |       slotbit
 157                                 |       PCMCIA_PV
 158                                 |       CONFIG_SYS_PCMCIA_TIMING );
 159                         break;
 160                 }
 161 #endif  /* CONFIG_HMI10 */
 162                 default:        /* set to not valid */
 163                         win->or = 0;
 164                         break;
 165                 }
 166
 167                 debug ("MemWin %d: PBR 0x%08lX  POR %08lX\n",
 168                        i, win->br, win->or);
 169                 base += CONFIG_SYS_PCMCIA_MEM_SIZE;
 170                 ++win;
 171         }
 172
 173         for (i=0, rc=0, slot=_slot_; i<PCMCIA_SOCKETS_NO; i++, slot = !slot) {
 174                 /* turn off voltage */
 175                 if ((rc = pcmcia_voltage_set(slot, 0, 0)))
 176                         continue;
 177
 178                 /* Enable external hardware */
 179                 if ((rc = pcmcia_hardware_enable(slot)))
 180                         continue;
 181
 182 #ifdef  CONFIG_IDE_8xx_PCCARD
 183                 if ((rc = check_ide_device(i)))
 184                         continue;
 185 #endif
 186         }
 187         return rc;
 188 }
 189
 190 #if defined(CONFIG_CMD_PCMCIA)
 191 int pcmcia_off (void)
 192 {
 193         int i;
 194         pcmcia_win_t *win;
 195
 196         printf ("Disable PCMCIA " PCMCIA_SLOT_MSG "\n");
 197
 198         /* clear interrupt state, and disable interrupts */
 199         ((immap_t *)CONFIG_SYS_IMMR)->im_pcmcia.pcmc_pscr =  PCMCIA_MASK(_slot_);
 200         ((immap_t *)CONFIG_SYS_IMMR)->im_pcmcia.pcmc_per &= ~PCMCIA_MASK(_slot_);
 201
 202         /* turn off interrupt and disable CxOE */
 203         PCMCIA_PGCRX(_slot_) = __MY_PCMCIA_GCRX_CXOE;
 204
 205         /* turn off memory windows */
 206         win = (pcmcia_win_t *)(&((immap_t *)CONFIG_SYS_IMMR)->im_pcmcia.pcmc_pbr0);
 207
 208         for (i=0; i<PCMCIA_MEM_WIN_NO; ++i) {
 209                 /* disable memory window */
 210                 win->or = 0;
 211                 ++win;
 212         }
 213
 214         /* turn off voltage */
 215         pcmcia_voltage_set(_slot_, 0, 0);
 216
 217         /* disable external hardware */
 218         printf ("Shutdown and Poweroff " PCMCIA_SLOT_MSG "\n");
 219         pcmcia_hardware_disable(_slot_);
 220         return 0;
 221 }
 222 #endif
 223
 224
 225 static u_int m8xx_get_graycode(u_int size)
 226 {
 227         u_int k;
 228
 229         for (k = 0; k < M8XX_SIZES_NO; k++) {
 230                 if(m8xx_size_to_gray[k] == size)
 231                         break;
 232         }
 233
 234         if((k == M8XX_SIZES_NO) || (m8xx_size_to_gray[k] == -1))
 235                 k = -1;
 236
 237         return k;
 238 }
 239
 240 #if     0
 241
 242 #if     defined(CONFIG_RPXCLASSIC) || defined(CONFIG_RPXLITE)
 243
 244 /* The RPX boards seems to have it's bus monitor timeout set to 6*8 clocks.
 245  * SYPCR is write once only, therefore must the slowest memory be faster
 246  * than the bus monitor or we will get a machine check due to the bus timeout.
 247  */
 248 #undef  PCMCIA_BMT_LIMIT
 249 #define PCMCIA_BMT_LIMIT (6*8)
 250 #endif
 251
 252 static u_int m8xx_get_speed(u_int ns, u_int is_io)
 253 {
 254         u_int reg, clocks, psst, psl, psht;
 255
 256         if(!ns) {
 257
 258                 /*
 259                 * We get called with IO maps setup to 0ns
 260                 * if not specified by the user.
 261                 * They should be 255ns.
 262                 */
 263
 264                 if(is_io)
 265                         ns = 255;
 266                 else
 267                         ns = 100;  /* fast memory if 0 */
 268         }
 269
 270         /*
 271         * In PSST, PSL, PSHT fields we tell the controller
 272         * timing parameters in CLKOUT clock cycles.
 273         * CLKOUT is the same as GCLK2_50.
 274         */
 275
 276         /* how we want to adjust the timing - in percent */
 277
 278 #define ADJ 180 /* 80 % longer accesstime - to be sure */
 279
 280         clocks = ((M8XX_BUSFREQ / 1000) * ns) / 1000;
 281         clocks = (clocks * ADJ) / (100*1000);
 282
 283         if(clocks >= PCMCIA_BMT_LIMIT) {
 284                 DEBUG(0, "Max access time limit reached\n");
 285                 clocks = PCMCIA_BMT_LIMIT-1;
 286         }
 287
 288         psst = clocks / 7;          /* setup time */
 289         psht = clocks / 7;          /* hold time */
 290         psl  = (clocks * 5) / 7;    /* strobe length */
 291
 292         psst += clocks - (psst + psht + psl);
 293
 294         reg =  psst << 12;
 295         reg |= psl  << 7;
 296         reg |= psht << 16;
 297
 298         return reg;
 299 }
 300 #endif  /* 0 */
 301
 302 #endif  /* CONFIG_PCMCIA */