drivers/tqm8xx_pcmcia.c

   1 /* -------------------------------------------------------------------- */
   2 /* TQM8xxL Boards by TQ Components                                      */
   3 /* SC8xx   Boards by SinoVee Microsystems                               */
   4 /* -------------------------------------------------------------------- */
   5 #include <common.h>
   6 #include <mpc8xx.h>
   7 #include <pcmcia.h>
   8
   9 #undef  CONFIG_PCMCIA
  10
  11 #if     (CONFIG_COMMANDS & CFG_CMD_PCMCIA)
  12 #define CONFIG_PCMCIA
  13 #endif
  14
  15 #if     (CONFIG_COMMANDS & CFG_CMD_IDE) && defined(CONFIG_IDE_8xx_PCCARD)
  16 #define CONFIG_PCMCIA
  17 #endif
  18
  19 #if     defined(CONFIG_PCMCIA)  \
  20         && (defined(CONFIG_TQM8xxL) || defined(CONFIG_SVM_SC8xx))
  21
  22 #if     defined(CONFIG_VIRTLAB2)
  23 #define PCMCIA_BOARD_MSG        "Virtlab2"
  24 #elif   defined(CONFIG_TQM8xxL)
  25 #define PCMCIA_BOARD_MSG        "TQM8xxL"
  26 #elif   defined(CONFIG_SVM_SC8xx)
  27 #define PCMCIA_BOARD_MSG        "SC8xx"
  28 #endif
  29
  30 #if     defined(CONFIG_NSCU)
  31
  32 #define power_config(slot)      do {} while (0)
  33 #define power_off(slot)         do {} while (0)
  34 #define power_on_5_0(slot)      do {} while (0)
  35 #define power_on_3_3(slot)      do {} while (0)
  36
  37 #elif   defined(CONFIG_HMI10)
  38
  39 static inline void power_config(int slot)
  40 {
  41         volatile immap_t *immap = (immap_t *)CFG_IMMR;
  42         /*
  43          * Configure Port B  pins for
  44          * 5 Volts Enable and 3 Volts enable
  45         */
  46         immap->im_cpm.cp_pbpar &= ~(0x00000300);
  47 }
  48
  49 static inline void power_off(int slot)
  50 {
  51         volatile immap_t *immap = (immap_t *)CFG_IMMR;
  52         /* remove all power */
  53         immap->im_cpm.cp_pbdat |= 0x00000300;
  54 }
  55
  56 static inline void power_on_5_0(int slot)
  57 {
  58         volatile immap_t *immap = (immap_t *)CFG_IMMR;
  59         immap->im_cpm.cp_pbdat &= ~(0x0000100);
  60         immap->im_cpm.cp_pbdir |= 0x00000300;
  61 }
  62
  63 static inline void power_on_3_3(int slot)
  64 {
  65         volatile immap_t *immap = (immap_t *)CFG_IMMR;
  66         immap->im_cpm.cp_pbdat &= ~(0x0000200);
  67         immap->im_cpm.cp_pbdir |= 0x00000300;
  68 }
  69
  70 #elif   defined(CONFIG_VIRTLAB2)
  71
  72 #define power_config(slot)      do {} while (0)
  73 static inline void power_off(int slot)
  74 {
  75         volatile unsigned char  *powerctl =
  76                         (volatile unsigned char *)PCMCIA_CTRL;
  77         *powerctl = 0;
  78 }
  79
  80 static inline void power_on_5_0(int slot)
  81 {
  82         volatile unsigned char  *powerctl =
  83                         (volatile unsigned char *)PCMCIA_CTRL;
  84                         *powerctl = 2;  /* Enable 5V Vccout */
  85 }
  86
  87 static inline void power_on_3_3(int slot)
  88 {
  89         volatile unsigned char  *powerctl =
  90                         (volatile unsigned char *)PCMCIA_CTRL;
  91                         *powerctl = 1;  /* Enable 3.3V Vccout */
  92 }
  93
  94 #else
  95
  96 static inline void power_config(int slot)
  97 {
  98         volatile immap_t *immap = (immap_t *)CFG_IMMR;
  99         /*
 100         * Configure Port C pins for
 101         * 5 Volts Enable and 3 Volts enable
 102         */
 103         immap->im_ioport.iop_pcpar &= ~(0x0002 | 0x0004);
 104         immap->im_ioport.iop_pcso  &= ~(0x0002 | 0x0004);
 105 }
 106
 107 static inline void power_off(int slot)
 108 {
 109         volatile immap_t *immap = (immap_t *)CFG_IMMR;
 110         immap->im_ioport.iop_pcdat &= ~(0x0002 | 0x0004);
 111 }
 112
 113 static inline void power_on_5_0(int slot)
 114 {
 115         volatile immap_t *immap = (immap_t *)CFG_IMMR;
 116         immap->im_ioport.iop_pcdat |= 0x0004;
 117         immap->im_ioport.iop_pcdir |= (0x0002 | 0x0004);
 118 }
 119
 120 static inline void power_on_3_3(int slot)
 121 {
 122         volatile immap_t *immap = (immap_t *)CFG_IMMR;
 123         immap->im_ioport.iop_pcdat |= 0x0002;
 124         immap->im_ioport.iop_pcdir |= (0x0002 | 0x0004);
 125 }
 126
 127 #endif
 128
 129 #ifdef  CONFIG_HMI10
 130 static inline int check_card_is_absent(int slot)
 131 {
 132         volatile pcmconf8xx_t *pcmp =
 133                 (pcmconf8xx_t *)(&(((immap_t *)CFG_IMMR)->im_pcmcia));
 134         return pcmp->pcmc_pipr & (0x10000000 >> (slot << 4));
 135 }
 136 #else
 137 static inline int check_card_is_absent(int slot)
 138 {
 139         volatile pcmconf8xx_t *pcmp =
 140                 (pcmconf8xx_t *)(&(((immap_t *)CFG_IMMR)->im_pcmcia));
 141         return pcmp->pcmc_pipr & (0x18000000 >> (slot << 4));
 142 }
 143 #endif
 144
 145 #ifdef  NSCU_OE_INV
 146 #define NSCU_GCRX_CXOE  0
 147 #else
 148 #define NSCU_GCRX_CXOE  __MY_PCMCIA_GCRX_CXOE
 149 #endif
 150
 151 int pcmcia_hardware_enable(int slot)
 152 {
 153         volatile pcmconf8xx_t *pcmp =
 154                 (pcmconf8xx_t *)(&(((immap_t *)CFG_IMMR)->im_pcmcia));
 155         volatile sysconf8xx_t *sysp =
 156                 (sysconf8xx_t *)(&(((immap_t *)CFG_IMMR)->im_siu_conf));
 157         uint reg, mask;
 158
 159         debug ("hardware_enable: " PCMCIA_BOARD_MSG " Slot %c\n", 'A'+slot);
 160
 161         udelay(10000);
 162
 163         /*
 164         * Configure SIUMCR to enable PCMCIA port B
 165         * (VFLS[0:1] are not used for debugging, we connect FRZ# instead)
 166         */
 167         sysp->sc_siumcr &= ~SIUMCR_DBGC11;      /* set DBGC to 00 */
 168
 169         /* clear interrupt state, and disable interrupts */
 170         pcmp->pcmc_pscr =  PCMCIA_MASK(slot);
 171         pcmp->pcmc_per &= ~PCMCIA_MASK(slot);
 172
 173         /*
 174         * Disable interrupts, DMA, and PCMCIA buffers
 175         * (isolate the interface) and assert RESET signal
 176         */
 177         debug ("Disable PCMCIA buffers and assert RESET\n");
 178         reg  = 0;
 179         reg |= __MY_PCMCIA_GCRX_CXRESET;        /* active high */
 180         reg |= NSCU_GCRX_CXOE;
 181
 182         PCMCIA_PGCRX(slot) = reg;
 183         udelay(500);
 184
 185         power_config(slot);
 186         power_off(slot);
 187
 188         /*
 189          * Make sure there is a card in the slot, then configure the interface.
 190         */
 191         udelay(10000);
 192         debug ("[%d] %s: PIPR(%p)=0x%x\n", __LINE__,__FUNCTION__,
 193                &(pcmp->pcmc_pipr),pcmp->pcmc_pipr);
 194
 195         if (check_card_is_absent(slot)) {
 196                 printf ("   No Card found\n");
 197                 return (1);
 198         }
 199
 200         /*
 201         * Power On.
 202         */
 203         mask = PCMCIA_VS1(slot) | PCMCIA_VS2(slot);
 204         reg  = pcmp->pcmc_pipr;
 205         debug ("PIPR: 0x%x ==> VS1=o%s, VS2=o%s\n",
 206                reg,
 207                (reg&PCMCIA_VS1(slot))?"n":"ff",
 208                (reg&PCMCIA_VS2(slot))?"n":"ff");
 209
 210         if ((reg & mask) == mask) {
 211                 power_on_5_0(slot);
 212                 puts (" 5.0V card found: ");
 213         } else {
 214                 power_on_3_3(slot);
 215                 puts (" 3.3V card found: ");
 216         }
 217
 218 #if 0
 219         /*  VCC switch error flag, PCMCIA slot INPACK_ pin */
 220         cp->cp_pbdir &= ~(0x0020 | 0x0010);
 221         cp->cp_pbpar &= ~(0x0020 | 0x0010);
 222         udelay(500000);
 223 #endif
 224
 225         udelay(1000);
 226         debug ("Enable PCMCIA buffers and stop RESET\n");
 227         reg  =  PCMCIA_PGCRX(slot);
 228         reg &= ~__MY_PCMCIA_GCRX_CXRESET;       /* active high */
 229         reg |= __MY_PCMCIA_GCRX_CXOE;           /* active low  */
 230         reg &= ~NSCU_GCRX_CXOE;
 231
 232         PCMCIA_PGCRX(slot) = reg;
 233
 234         udelay(250000); /* some cards need >150 ms to come up :-( */
 235
 236         debug ("# hardware_enable done\n");
 237
 238         return (0);
 239 }
 240
 241
 242 #if (CONFIG_COMMANDS & CFG_CMD_PCMCIA)
 243 int pcmcia_hardware_disable(int slot)
 244 {
 245         volatile pcmconf8xx_t *pcmp =
 246                 (pcmconf8xx_t *)(&(((immap_t *)CFG_IMMR)->im_pcmcia));
 247         u_long reg;
 248
 249         debug ("hardware_disable: " PCMCIA_BOARD_MSG " Slot %c\n", 'A'+slot);
 250
 251
 252         /* remove all power */
 253         power_off(slot);
 254
 255         debug ("Disable PCMCIA buffers and assert RESET\n");
 256         reg  = 0;
 257         reg |= __MY_PCMCIA_GCRX_CXRESET;        /* active high */
 258         reg |= NSCU_GCRX_CXOE;                  /* active low  */
 259
 260         PCMCIA_PGCRX(slot) = reg;
 261
 262         udelay(10000);
 263
 264         return (0);
 265 }
 266 #endif  /* CFG_CMD_PCMCIA */
 267
 268 int pcmcia_voltage_set(int slot, int vcc, int vpp)
 269 {
 270 #ifndef CONFIG_NSCU
 271         volatile pcmconf8xx_t *pcmp =
 272                 (pcmconf8xx_t *)(&(((immap_t *)CFG_IMMR)->im_pcmcia));
 273         u_long reg;
 274
 275         debug ("voltage_set: " PCMCIA_BOARD_MSG
 276                 " Slot %c, Vcc=%d.%d, Vpp=%d.%d\n",
 277                 'A'+slot, vcc/10, vcc%10, vpp/10, vcc%10);
 278
 279         /*
 280         * Disable PCMCIA buffers (isolate the interface)
 281         * and assert RESET signal
 282         */
 283         debug ("Disable PCMCIA buffers and assert RESET\n");
 284         reg  = PCMCIA_PGCRX(slot);
 285         reg |= __MY_PCMCIA_GCRX_CXRESET;        /* active high */
 286         reg &= ~__MY_PCMCIA_GCRX_CXOE;          /* active low  */
 287         reg |= NSCU_GCRX_CXOE;                  /* active low  */
 288
 289         PCMCIA_PGCRX(slot) = reg;
 290         udelay(500);
 291
 292         debug ("PCMCIA power OFF\n");
 293         power_config(slot);
 294         power_off(slot);
 295
 296         switch(vcc) {
 297                 case  0:                        break;
 298                 case 33: power_on_3_3(slot);    break;
 299                 case 50: power_on_5_0(slot);    break;
 300                 default:                        goto done;
 301         }
 302
 303         /* Checking supported voltages */
 304
 305         debug("PIPR: 0x%x --> %s\n", pcmp->pcmc_pipr,
 306                (pcmp->pcmc_pipr & 0x00008000) ? "only 5 V" : "can do 3.3V");
 307
 308         if (vcc)
 309                 debug("PCMCIA powered at %sV\n", (vcc == 50) ? "5.0" : "3.3");
 310         else
 311                 debug("PCMCIA powered down\n");
 312
 313 done:
 314         debug("Enable PCMCIA buffers and stop RESET\n");
 315         reg  =  PCMCIA_PGCRX(slot);
 316         reg &= ~__MY_PCMCIA_GCRX_CXRESET;       /* active high */
 317         reg |= __MY_PCMCIA_GCRX_CXOE;           /* active low  */
 318         reg &= ~NSCU_GCRX_CXOE;                 /* active low  */
 319
 320         PCMCIA_PGCRX(slot) = reg;
 321         udelay(500);
 322
 323         debug("voltage_set: " PCMCIA_BOARD_MSG " Slot %c, DONE\n", slot+'A');
 324 #endif  /* CONFIG_NSCU */
 325         return (0);
 326 }
 327
 328 #endif  /* CONFIG_PCMCIA && (CONFIG_TQM8xxL || CONFIG_SVM_SC8xx) */