1 /* 2 * Linux driver for digital TV devices equipped with B2C2 FlexcopII(b)/III 3 * flexcop-sram.c - functions for controlling the SRAM 4 * see flexcop.c for copyright information 5 */ 6 #include "flexcop.h" 7 8 static void flexcop_sram_set_chip(struct flexcop_device *fc, 9 flexcop_sram_type_t type) 10 { 11 flexcop_set_ibi_value(wan_ctrl_reg_71c, sram_chip, type); 12 } 13 14 int flexcop_sram_init(struct flexcop_device *fc) 15 { 16 switch (fc->rev) { 17 case FLEXCOP_II: 18 case FLEXCOP_IIB: 19 flexcop_sram_set_chip(fc, FC_SRAM_1_32KB); 20 break; 21 case FLEXCOP_III: 22 flexcop_sram_set_chip(fc, FC_SRAM_1_48KB); 23 break; 24 default: 25 return -EINVAL; 26 } 27 return 0; 28 } 29 30 int flexcop_sram_set_dest(struct flexcop_device *fc, flexcop_sram_dest_t dest, 31 flexcop_sram_dest_target_t target) 32 { 33 flexcop_ibi_value v; 34 v = fc->read_ibi_reg(fc, sram_dest_reg_714); 35 36 if (fc->rev != FLEXCOP_III && target == FC_SRAM_DEST_TARGET_FC3_CA) { 37 err("SRAM destination target to available on FlexCopII(b)\n"); 38 return -EINVAL; 39 } 40 deb_sram("sram dest: %x target: %x\n", dest, target); 41 42 if (dest & FC_SRAM_DEST_NET) 43 v.sram_dest_reg_714.NET_Dest = target; 44 if (dest & FC_SRAM_DEST_CAI) 45 v.sram_dest_reg_714.CAI_Dest = target; 46 if (dest & FC_SRAM_DEST_CAO) 47 v.sram_dest_reg_714.CAO_Dest = target; 48 if (dest & FC_SRAM_DEST_MEDIA) 49 v.sram_dest_reg_714.MEDIA_Dest = target; 50 51 fc->write_ibi_reg(fc,sram_dest_reg_714,v); 52 udelay(1000); /* TODO delay really necessary */ 53 54 return 0; 55 } 56 EXPORT_SYMBOL(flexcop_sram_set_dest); 57 58 void flexcop_wan_set_speed(struct flexcop_device *fc, flexcop_wan_speed_t s) 59 { 60 flexcop_set_ibi_value(wan_ctrl_reg_71c,wan_speed_sig,s); 61 } 62 EXPORT_SYMBOL(flexcop_wan_set_speed); 63 64 void flexcop_sram_ctrl(struct flexcop_device *fc, int usb_wan, int sramdma, int maximumfill) 65 { 66 flexcop_ibi_value v = fc->read_ibi_reg(fc,sram_dest_reg_714); 67 v.sram_dest_reg_714.ctrl_usb_wan = usb_wan; 68 v.sram_dest_reg_714.ctrl_sramdma = sramdma; 69 v.sram_dest_reg_714.ctrl_maximumfill = maximumfill; 70 fc->write_ibi_reg(fc,sram_dest_reg_714,v); 71 } 72 EXPORT_SYMBOL(flexcop_sram_ctrl); 73 74 #if 0 75 static void flexcop_sram_write(struct adapter *adapter, u32 bank, u32 addr, u8 *buf, u32 len) 76 { 77 int i, retries; 78 u32 command; 79 80 for (i = 0; i < len; i++) { 81 command = bank | addr | 0x04000000 | (*buf << 0x10); 82 83 retries = 2; 84 85 while (((read_reg_dw(adapter, 0x700) & 0x80000000) != 0) && (retries > 0)) { 86 mdelay(1); 87 retries--; 88 }; 89 90 if (retries == 0) 91 printk("%s: SRAM timeout\n", __func__); 92 93 write_reg_dw(adapter, 0x700, command); 94 95 buf++; 96 addr++; 97 } 98 } 99 100 static void flex_sram_read(struct adapter *adapter, u32 bank, u32 addr, u8 *buf, u32 len) 101 { 102 int i, retries; 103 u32 command, value; 104 105 for (i = 0; i < len; i++) { 106 command = bank | addr | 0x04008000; 107 108 retries = 10000; 109 110 while (((read_reg_dw(adapter, 0x700) & 0x80000000) != 0) && (retries > 0)) { 111 mdelay(1); 112 retries--; 113 }; 114 115 if (retries == 0) 116 printk("%s: SRAM timeout\n", __func__); 117 118 write_reg_dw(adapter, 0x700, command); 119 120 retries = 10000; 121 122 while (((read_reg_dw(adapter, 0x700) & 0x80000000) != 0) && (retries > 0)) { 123 mdelay(1); 124 retries--; 125 }; 126 127 if (retries == 0) 128 printk("%s: SRAM timeout\n", __func__); 129 130 value = read_reg_dw(adapter, 0x700) >> 0x10; 131 132 *buf = (value & 0xff); 133 134 addr++; 135 buf++; 136 } 137 } 138 139 static void sram_write_chunk(struct adapter *adapter, u32 addr, u8 *buf, u16 len) 140 { 141 u32 bank; 142 143 bank = 0; 144 145 if (adapter->dw_sram_type == 0x20000) { 146 bank = (addr & 0x18000) << 0x0d; 147 } 148 149 if (adapter->dw_sram_type == 0x00000) { 150 if ((addr >> 0x0f) == 0) 151 bank = 0x20000000; 152 else 153 bank = 0x10000000; 154 } 155 flex_sram_write(adapter, bank, addr & 0x7fff, buf, len); 156 } 157 158 static void sram_read_chunk(struct adapter *adapter, u32 addr, u8 *buf, u16 len) 159 { 160 u32 bank; 161 bank = 0; 162 163 if (adapter->dw_sram_type == 0x20000) { 164 bank = (addr & 0x18000) << 0x0d; 165 } 166 167 if (adapter->dw_sram_type == 0x00000) { 168 if ((addr >> 0x0f) == 0) 169 bank = 0x20000000; 170 else 171 bank = 0x10000000; 172 } 173 flex_sram_read(adapter, bank, addr & 0x7fff, buf, len); 174 } 175 176 static void sram_read(struct adapter *adapter, u32 addr, u8 *buf, u32 len) 177 { 178 u32 length; 179 while (len != 0) { 180 length = len; 181 /* check if the address range belongs to the same 182 * 32K memory chip. If not, the data is read 183 * from one chip at a time */ 184 if ((addr >> 0x0f) != ((addr + len - 1) >> 0x0f)) { 185 length = (((addr >> 0x0f) + 1) << 0x0f) - addr; 186 } 187 188 sram_read_chunk(adapter, addr, buf, length); 189 addr = addr + length; 190 buf = buf + length; 191 len = len - length; 192 } 193 } 194 195 static void sram_write(struct adapter *adapter, u32 addr, u8 *buf, u32 len) 196 { 197 u32 length; 198 while (len != 0) { 199 length = len; 200 201 /* check if the address range belongs to the same 202 * 32K memory chip. If not, the data is 203 * written to one chip at a time */ 204 if ((addr >> 0x0f) != ((addr + len - 1) >> 0x0f)) { 205 length = (((addr >> 0x0f) + 1) << 0x0f) - addr; 206 } 207 208 sram_write_chunk(adapter, addr, buf, length); 209 addr = addr + length; 210 buf = buf + length; 211 len = len - length; 212 } 213 } 214 215 static void sram_set_size(struct adapter *adapter, u32 mask) 216 { 217 write_reg_dw(adapter, 0x71c, 218 (mask | (~0x30000 & read_reg_dw(adapter, 0x71c)))); 219 } 220 221 static void sram_init(struct adapter *adapter) 222 { 223 u32 tmp; 224 tmp = read_reg_dw(adapter, 0x71c); 225 write_reg_dw(adapter, 0x71c, 1); 226 227 if (read_reg_dw(adapter, 0x71c) != 0) { 228 write_reg_dw(adapter, 0x71c, tmp); 229 adapter->dw_sram_type = tmp & 0x30000; 230 ddprintk("%s: dw_sram_type = %x\n", __func__, adapter->dw_sram_type); 231 } else { 232 adapter->dw_sram_type = 0x10000; 233 ddprintk("%s: dw_sram_type = %x\n", __func__, adapter->dw_sram_type); 234 } 235 } 236 237 static int sram_test_location(struct adapter *adapter, u32 mask, u32 addr) 238 { 239 u8 tmp1, tmp2; 240 dprintk("%s: mask = %x, addr = %x\n", __func__, mask, addr); 241 242 sram_set_size(adapter, mask); 243 sram_init(adapter); 244 245 tmp2 = 0xa5; 246 tmp1 = 0x4f; 247 248 sram_write(adapter, addr, &tmp2, 1); 249 sram_write(adapter, addr + 4, &tmp1, 1); 250 251 tmp2 = 0; 252 mdelay(20); 253 254 sram_read(adapter, addr, &tmp2, 1); 255 sram_read(adapter, addr, &tmp2, 1); 256 257 dprintk("%s: wrote 0xa5, read 0x%2x\n", __func__, tmp2); 258 259 if (tmp2 != 0xa5) 260 return 0; 261 262 tmp2 = 0x5a; 263 tmp1 = 0xf4; 264 265 sram_write(adapter, addr, &tmp2, 1); 266 sram_write(adapter, addr + 4, &tmp1, 1); 267 268 tmp2 = 0; 269 mdelay(20); 270 271 sram_read(adapter, addr, &tmp2, 1); 272 sram_read(adapter, addr, &tmp2, 1); 273 274 dprintk("%s: wrote 0x5a, read 0x%2x\n", __func__, tmp2); 275 276 if (tmp2 != 0x5a) 277 return 0; 278 return 1; 279 } 280 281 static u32 sram_length(struct adapter *adapter) 282 { 283 if (adapter->dw_sram_type == 0x10000) 284 return 32768; /* 32K */ 285 if (adapter->dw_sram_type == 0x00000) 286 return 65536; /* 64K */ 287 if (adapter->dw_sram_type == 0x20000) 288 return 131072; /* 128K */ 289 return 32768; /* 32K */ 290 } 291 292 /* FlexcopII can work with 32K, 64K or 128K of external SRAM memory. 293 - for 128K there are 4x32K chips at bank 0,1,2,3. 294 - for 64K there are 2x32K chips at bank 1,2. 295 - for 32K there is one 32K chip at bank 0. 296 297 FlexCop works only with one bank at a time. The bank is selected 298 by bits 28-29 of the 0x700 register. 299 300 bank 0 covers addresses 0x00000-0x07fff 301 bank 1 covers addresses 0x08000-0x0ffff 302 bank 2 covers addresses 0x10000-0x17fff 303 bank 3 covers addresses 0x18000-0x1ffff */ 304 305 static int flexcop_sram_detect(struct flexcop_device *fc) 306 { 307 flexcop_ibi_value r208, r71c_0, vr71c_1; 308 r208 = fc->read_ibi_reg(fc, ctrl_208); 309 fc->write_ibi_reg(fc, ctrl_208, ibi_zero); 310 311 r71c_0 = fc->read_ibi_reg(fc, wan_ctrl_reg_71c); 312 write_reg_dw(adapter, 0x71c, 1); 313 tmp3 = read_reg_dw(adapter, 0x71c); 314 dprintk("%s: tmp3 = %x\n", __func__, tmp3); 315 write_reg_dw(adapter, 0x71c, tmp2); 316 317 // check for internal SRAM ??? 318 tmp3--; 319 if (tmp3 != 0) { 320 sram_set_size(adapter, 0x10000); 321 sram_init(adapter); 322 write_reg_dw(adapter, 0x208, tmp); 323 dprintk("%s: sram size = 32K\n", __func__); 324 return 32; 325 } 326 327 if (sram_test_location(adapter, 0x20000, 0x18000) != 0) { 328 sram_set_size(adapter, 0x20000); 329 sram_init(adapter); 330 write_reg_dw(adapter, 0x208, tmp); 331 dprintk("%s: sram size = 128K\n", __func__); 332 return 128; 333 } 334 335 if (sram_test_location(adapter, 0x00000, 0x10000) != 0) { 336 sram_set_size(adapter, 0x00000); 337 sram_init(adapter); 338 write_reg_dw(adapter, 0x208, tmp); 339 dprintk("%s: sram size = 64K\n", __func__); 340 return 64; 341 } 342 343 if (sram_test_location(adapter, 0x10000, 0x00000) != 0) { 344 sram_set_size(adapter, 0x10000); 345 sram_init(adapter); 346 write_reg_dw(adapter, 0x208, tmp); 347 dprintk("%s: sram size = 32K\n", __func__); 348 return 32; 349 } 350 351 sram_set_size(adapter, 0x10000); 352 sram_init(adapter); 353 write_reg_dw(adapter, 0x208, tmp); 354 dprintk("%s: SRAM detection failed. Set to 32K \n", __func__); 355 return 0; 356 } 357 358 static void sll_detect_sram_size(struct adapter *adapter) 359 { 360 sram_detect_for_flex2(adapter); 361 } 362 363 #endif 364