drivers/media/dvb/b2c2/flexcop-sram.c

   1 /*
   2  * This file is part of linux driver the digital TV devices equipped with B2C2 FlexcopII(b)/III
   3  *
   4  * flexcop-sram.c - functions for controlling the SRAM.
   5  *
   6  * see flexcop.c for copyright information.
   7  */
   8 #include "flexcop.h"
   9
  10 static void flexcop_sram_set_chip (struct flexcop_device *fc, flexcop_sram_type_t type)
  11 {
  12         flexcop_set_ibi_value(wan_ctrl_reg_71c,sram_chip,type);
  13 }
  14
  15 int flexcop_sram_init(struct flexcop_device *fc)
  16 {
  17         switch (fc->rev) {
  18                 case FLEXCOP_II:
  19                 case FLEXCOP_IIB:
  20                         flexcop_sram_set_chip(fc,FC_SRAM_1_32KB);
  21                         break;
  22                 case FLEXCOP_III:
  23                         flexcop_sram_set_chip(fc,FC_SRAM_1_48KB);
  24                         break;
  25                 default:
  26                         return -EINVAL;
  27         }
  28         return 0;
  29 }
  30
  31 int flexcop_sram_set_dest(struct flexcop_device *fc, flexcop_sram_dest_t dest, flexcop_sram_dest_target_t target)
  32 {
  33         flexcop_ibi_value v;
  34
  35         v = fc->read_ibi_reg(fc,sram_dest_reg_714);
  36
  37         if (fc->rev != FLEXCOP_III && target == FC_SRAM_DEST_TARGET_FC3_CA) {
  38                 err("SRAM destination target to available on FlexCopII(b)\n");
  39                 return -EINVAL;
  40         }
  41
  42         deb_sram("sram dest: %x target: %x\n",dest, target);
  43
  44         if (dest & FC_SRAM_DEST_NET)
  45                 v.sram_dest_reg_714.NET_Dest = target;
  46         if (dest & FC_SRAM_DEST_CAI)
  47                 v.sram_dest_reg_714.CAI_Dest = target;
  48         if (dest & FC_SRAM_DEST_CAO)
  49                 v.sram_dest_reg_714.CAO_Dest = target;
  50         if (dest & FC_SRAM_DEST_MEDIA)
  51                 v.sram_dest_reg_714.MEDIA_Dest = target;
  52
  53         fc->write_ibi_reg(fc,sram_dest_reg_714,v);
  54         udelay(1000); /* TODO delay really necessary */
  55
  56         return 0;
  57 }
  58 EXPORT_SYMBOL(flexcop_sram_set_dest);
  59
  60 void flexcop_wan_set_speed(struct flexcop_device *fc, flexcop_wan_speed_t s)
  61 {
  62         flexcop_set_ibi_value(wan_ctrl_reg_71c,wan_speed_sig,s);
  63 }
  64 EXPORT_SYMBOL(flexcop_wan_set_speed);
  65
  66 void flexcop_sram_ctrl(struct flexcop_device *fc, int usb_wan, int sramdma, int maximumfill)
  67 {
  68         flexcop_ibi_value v = fc->read_ibi_reg(fc,sram_dest_reg_714);
  69         v.sram_dest_reg_714.ctrl_usb_wan = usb_wan;
  70         v.sram_dest_reg_714.ctrl_sramdma = sramdma;
  71         v.sram_dest_reg_714.ctrl_maximumfill = maximumfill;
  72         fc->write_ibi_reg(fc,sram_dest_reg_714,v);
  73 }
  74 EXPORT_SYMBOL(flexcop_sram_ctrl);
  75
  76 #if 0
  77 static void flexcop_sram_write(struct adapter *adapter, u32 bank, u32 addr, u8 *buf, u32 len)
  78 {
  79         int i, retries;
  80         u32 command;
  81
  82         for (i = 0; i < len; i++) {
  83                 command = bank | addr | 0x04000000 | (*buf << 0x10);
  84
  85                 retries = 2;
  86
  87                 while (((read_reg_dw(adapter, 0x700) & 0x80000000) != 0) && (retries > 0)) {
  88                         mdelay(1);
  89                         retries--;
  90                 };
  91
  92                 if (retries == 0)
  93                         printk("%s: SRAM timeout\n", __func__);
  94
  95                 write_reg_dw(adapter, 0x700, command);
  96
  97                 buf++;
  98                 addr++;
  99         }
 100 }
 101
 102 static void flex_sram_read(struct adapter *adapter, u32 bank, u32 addr, u8 *buf, u32 len)
 103 {
 104         int i, retries;
 105         u32 command, value;
 106
 107         for (i = 0; i < len; i++) {
 108                 command = bank | addr | 0x04008000;
 109
 110                 retries = 10000;
 111
 112                 while (((read_reg_dw(adapter, 0x700) & 0x80000000) != 0) && (retries > 0)) {
 113                         mdelay(1);
 114                         retries--;
 115                 };
 116
 117                 if (retries == 0)
 118                         printk("%s: SRAM timeout\n", __func__);
 119
 120                 write_reg_dw(adapter, 0x700, command);
 121
 122                 retries = 10000;
 123
 124                 while (((read_reg_dw(adapter, 0x700) & 0x80000000) != 0) && (retries > 0)) {
 125                         mdelay(1);
 126                         retries--;
 127                 };
 128
 129                 if (retries == 0)
 130                         printk("%s: SRAM timeout\n", __func__);
 131
 132                 value = read_reg_dw(adapter, 0x700) >> 0x10;
 133
 134                 *buf = (value & 0xff);
 135
 136                 addr++;
 137                 buf++;
 138         }
 139 }
 140
 141 static void sram_write_chunk(struct adapter *adapter, u32 addr, u8 *buf, u16 len)
 142 {
 143         u32 bank;
 144
 145         bank = 0;
 146
 147         if (adapter->dw_sram_type == 0x20000) {
 148                 bank = (addr & 0x18000) << 0x0d;
 149         }
 150
 151         if (adapter->dw_sram_type == 0x00000) {
 152                 if ((addr >> 0x0f) == 0)
 153                         bank = 0x20000000;
 154                 else
 155                         bank = 0x10000000;
 156         }
 157
 158         flex_sram_write(adapter, bank, addr & 0x7fff, buf, len);
 159 }
 160
 161 static void sram_read_chunk(struct adapter *adapter, u32 addr, u8 *buf, u16 len)
 162 {
 163         u32 bank;
 164
 165         bank = 0;
 166
 167         if (adapter->dw_sram_type == 0x20000) {
 168                 bank = (addr & 0x18000) << 0x0d;
 169         }
 170
 171         if (adapter->dw_sram_type == 0x00000) {
 172                 if ((addr >> 0x0f) == 0)
 173                         bank = 0x20000000;
 174                 else
 175                         bank = 0x10000000;
 176         }
 177
 178         flex_sram_read(adapter, bank, addr & 0x7fff, buf, len);
 179 }
 180
 181 static void sram_read(struct adapter *adapter, u32 addr, u8 *buf, u32 len)
 182 {
 183         u32 length;
 184
 185         while (len != 0) {
 186                 length = len;
 187
 188                 // check if the address range belongs to the same
 189                 // 32K memory chip. If not, the data is read from
 190                 // one chip at a time.
 191                 if ((addr >> 0x0f) != ((addr + len - 1) >> 0x0f)) {
 192                         length = (((addr >> 0x0f) + 1) << 0x0f) - addr;
 193                 }
 194
 195                 sram_read_chunk(adapter, addr, buf, length);
 196
 197                 addr = addr + length;
 198                 buf = buf + length;
 199                 len = len - length;
 200         }
 201 }
 202
 203 static void sram_write(struct adapter *adapter, u32 addr, u8 *buf, u32 len)
 204 {
 205         u32 length;
 206
 207         while (len != 0) {
 208                 length = len;
 209
 210                 // check if the address range belongs to the same
 211                 // 32K memory chip. If not, the data is written to
 212                 // one chip at a time.
 213                 if ((addr >> 0x0f) != ((addr + len - 1) >> 0x0f)) {
 214                         length = (((addr >> 0x0f) + 1) << 0x0f) - addr;
 215                 }
 216
 217                 sram_write_chunk(adapter, addr, buf, length);
 218
 219                 addr = addr + length;
 220                 buf = buf + length;
 221                 len = len - length;
 222         }
 223 }
 224
 225 static void sram_set_size(struct adapter *adapter, u32 mask)
 226 {
 227         write_reg_dw(adapter, 0x71c, (mask | (~0x30000 & read_reg_dw(adapter, 0x71c))));
 228 }
 229
 230 static void sram_init(struct adapter *adapter)
 231 {
 232         u32 tmp;
 233
 234         tmp = read_reg_dw(adapter, 0x71c);
 235
 236         write_reg_dw(adapter, 0x71c, 1);
 237
 238         if (read_reg_dw(adapter, 0x71c) != 0) {
 239                 write_reg_dw(adapter, 0x71c, tmp);
 240
 241                 adapter->dw_sram_type = tmp & 0x30000;
 242
 243                 ddprintk("%s: dw_sram_type = %x\n", __func__, adapter->dw_sram_type);
 244
 245         } else {
 246
 247                 adapter->dw_sram_type = 0x10000;
 248
 249                 ddprintk("%s: dw_sram_type = %x\n", __func__, adapter->dw_sram_type);
 250         }
 251
 252         /* return value is never used? */
 253 /*      return adapter->dw_sram_type; */
 254 }
 255
 256 static int sram_test_location(struct adapter *adapter, u32 mask, u32 addr)
 257 {
 258         u8 tmp1, tmp2;
 259
 260         dprintk("%s: mask = %x, addr = %x\n", __func__, mask, addr);
 261
 262         sram_set_size(adapter, mask);
 263         sram_init(adapter);
 264
 265         tmp2 = 0xa5;
 266         tmp1 = 0x4f;
 267
 268         sram_write(adapter, addr, &tmp2, 1);
 269         sram_write(adapter, addr + 4, &tmp1, 1);
 270
 271         tmp2 = 0;
 272
 273         mdelay(20);
 274
 275         sram_read(adapter, addr, &tmp2, 1);
 276         sram_read(adapter, addr, &tmp2, 1);
 277
 278         dprintk("%s: wrote 0xa5, read 0x%2x\n", __func__, tmp2);
 279
 280         if (tmp2 != 0xa5)
 281                 return 0;
 282
 283         tmp2 = 0x5a;
 284         tmp1 = 0xf4;
 285
 286         sram_write(adapter, addr, &tmp2, 1);
 287         sram_write(adapter, addr + 4, &tmp1, 1);
 288
 289         tmp2 = 0;
 290
 291         mdelay(20);
 292
 293         sram_read(adapter, addr, &tmp2, 1);
 294         sram_read(adapter, addr, &tmp2, 1);
 295
 296         dprintk("%s: wrote 0x5a, read 0x%2x\n", __func__, tmp2);
 297
 298         if (tmp2 != 0x5a)
 299                 return 0;
 300
 301         return 1;
 302 }
 303
 304 static u32 sram_length(struct adapter *adapter)
 305 {
 306         if (adapter->dw_sram_type == 0x10000)
 307                 return 32768;   //  32K
 308         if (adapter->dw_sram_type == 0x00000)
 309                 return 65536;   //  64K
 310         if (adapter->dw_sram_type == 0x20000)
 311                 return 131072;  // 128K
 312
 313         return 32768;           // 32K
 314 }
 315
 316 /* FlexcopII can work with 32K, 64K or 128K of external SRAM memory.
 317     - for 128K there are 4x32K chips at bank 0,1,2,3.
 318     - for  64K there are 2x32K chips at bank 1,2.
 319     - for  32K there is one 32K chip at bank 0.
 320
 321    FlexCop works only with one bank at a time. The bank is selected
 322    by bits 28-29 of the 0x700 register.
 323
 324    bank 0 covers addresses 0x00000-0x07fff
 325    bank 1 covers addresses 0x08000-0x0ffff
 326    bank 2 covers addresses 0x10000-0x17fff
 327    bank 3 covers addresses 0x18000-0x1ffff
 328 */
 329
 330 static int flexcop_sram_detect(struct flexcop_device *fc)
 331 {
 332         flexcop_ibi_value r208,r71c_0,vr71c_1;
 333
 334         r208 = fc->read_ibi_reg(fc, ctrl_208);
 335         fc->write_ibi_reg(fc, ctrl_208, ibi_zero);
 336
 337         r71c_0 = fc->read_ibi_reg(fc, wan_ctrl_reg_71c);
 338
 339         write_reg_dw(adapter, 0x71c, 1);
 340
 341         tmp3 = read_reg_dw(adapter, 0x71c);
 342
 343         dprintk("%s: tmp3 = %x\n", __func__, tmp3);
 344
 345         write_reg_dw(adapter, 0x71c, tmp2);
 346
 347         // check for internal SRAM ???
 348         tmp3--;
 349         if (tmp3 != 0) {
 350                 sram_set_size(adapter, 0x10000);
 351                 sram_init(adapter);
 352                 write_reg_dw(adapter, 0x208, tmp);
 353
 354                 dprintk("%s: sram size = 32K\n", __func__);
 355
 356                 return 32;
 357         }
 358
 359         if (sram_test_location(adapter, 0x20000, 0x18000) != 0) {
 360                 sram_set_size(adapter, 0x20000);
 361                 sram_init(adapter);
 362                 write_reg_dw(adapter, 0x208, tmp);
 363
 364                 dprintk("%s: sram size = 128K\n", __func__);
 365
 366                 return 128;
 367         }
 368
 369         if (sram_test_location(adapter, 0x00000, 0x10000) != 0) {
 370                 sram_set_size(adapter, 0x00000);
 371                 sram_init(adapter);
 372                 write_reg_dw(adapter, 0x208, tmp);
 373
 374                 dprintk("%s: sram size = 64K\n", __func__);
 375
 376                 return 64;
 377         }
 378
 379         if (sram_test_location(adapter, 0x10000, 0x00000) != 0) {
 380                 sram_set_size(adapter, 0x10000);
 381                 sram_init(adapter);
 382                 write_reg_dw(adapter, 0x208, tmp);
 383
 384                 dprintk("%s: sram size = 32K\n", __func__);
 385
 386                 return 32;
 387         }
 388
 389         sram_set_size(adapter, 0x10000);
 390         sram_init(adapter);
 391         write_reg_dw(adapter, 0x208, tmp);
 392
 393         dprintk("%s: SRAM detection failed. Set to 32K \n", __func__);
 394
 395         return 0;
 396 }
 397
 398 static void sll_detect_sram_size(struct adapter *adapter)
 399 {
 400         sram_detect_for_flex2(adapter);
 401 }
 402
 403 #endif