Eric Lee / smarc-ti-linux-kernel

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Commit 2be589e4b28457f148640dc6addf6da24af64b7f

Authored by pekon gupta
Committed by Brian Norris
1 parent 27c9fd6075
Exists in ti-lsk-linux-4.1.y and in 10 other branches dlt-processor-sdk-linux-03.00.00.04, processor-sdk-linux-02.00.01, smarc-ti-lsk-linux-4.1.y, smarct3x-processor-sdk-04.01.00.06, smarct3x-processor-sdk-linux-02.00.01, smarct3x-processor-sdk-linux-03.00.00.04, smarct4x-800-processor-sdk-linux-02.00.01, smarct4x-processor-sdk-04.01.00.06, smarct4x-processor-sdk-linux-02.00.01, smarct4x-processor-sdk-linux-03.00.00.04

mtd: nand: omap: add support for BCH16_ECC - ELM driver updates 

ELM hardware engine is used to detect ECC errors for BCHx ecc-schemes
(like BCH4/BCH8/BCH16). This patch extends configuration of ELM registers
for adding support of BCH16_HW ecc-scheme.

Signed-off-by: Pekon Gupta <pekon@ti.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>

Showing 2 changed files with 38 additions and 1 deletions Side-by-side Diff

drivers/mtd/devices/elm.c
Diff comments   View file @ 2be589e
... ... @@ -213,6 +213,28 @@
213 213 val = cpu_to_be32(*(u32 *) &ecc[0]) >> 12;
214 214 elm_write_reg(info, offset, val);
215 215 break;
  216 + case BCH16_ECC:
  217 + val = cpu_to_be32(*(u32 *) &ecc[22]);
  218 + elm_write_reg(info, offset, val);
  219 + offset += 4;
  220 + val = cpu_to_be32(*(u32 *) &ecc[18]);
  221 + elm_write_reg(info, offset, val);
  222 + offset += 4;
  223 + val = cpu_to_be32(*(u32 *) &ecc[14]);
  224 + elm_write_reg(info, offset, val);
  225 + offset += 4;
  226 + val = cpu_to_be32(*(u32 *) &ecc[10]);
  227 + elm_write_reg(info, offset, val);
  228 + offset += 4;
  229 + val = cpu_to_be32(*(u32 *) &ecc[6]);
  230 + elm_write_reg(info, offset, val);
  231 + offset += 4;
  232 + val = cpu_to_be32(*(u32 *) &ecc[2]);
  233 + elm_write_reg(info, offset, val);
  234 + offset += 4;
  235 + val = cpu_to_be32(*(u32 *) &ecc[0]) >> 16;
  236 + elm_write_reg(info, offset, val);
  237 + break;
216 238 default:
217 239 pr_err("invalid config bch_type\n");
218 240 }
... ... @@ -436,6 +458,13 @@
436 458 for (i = 0; i < ERROR_VECTOR_MAX; i++) {
437 459 offset = i * SYNDROME_FRAGMENT_REG_SIZE;
438 460 switch (bch_type) {
  461 + case BCH16_ECC:
  462 + regs->elm_syndrome_fragment_6[i] = elm_read_reg(info,
  463 + ELM_SYNDROME_FRAGMENT_6 + offset);
  464 + regs->elm_syndrome_fragment_5[i] = elm_read_reg(info,
  465 + ELM_SYNDROME_FRAGMENT_5 + offset);
  466 + regs->elm_syndrome_fragment_4[i] = elm_read_reg(info,
  467 + ELM_SYNDROME_FRAGMENT_4 + offset);
439 468 case BCH8_ECC:
440 469 regs->elm_syndrome_fragment_3[i] = elm_read_reg(info,
441 470 ELM_SYNDROME_FRAGMENT_3 + offset);
... ... @@ -474,6 +503,13 @@
474 503 for (i = 0; i < ERROR_VECTOR_MAX; i++) {
475 504 offset = i * SYNDROME_FRAGMENT_REG_SIZE;
476 505 switch (bch_type) {
  506 + case BCH16_ECC:
  507 + elm_write_reg(info, ELM_SYNDROME_FRAGMENT_6 + offset,
  508 + regs->elm_syndrome_fragment_6[i]);
  509 + elm_write_reg(info, ELM_SYNDROME_FRAGMENT_5 + offset,
  510 + regs->elm_syndrome_fragment_5[i]);
  511 + elm_write_reg(info, ELM_SYNDROME_FRAGMENT_4 + offset,
  512 + regs->elm_syndrome_fragment_4[i]);
477 513 case BCH8_ECC:
478 514 elm_write_reg(info, ELM_SYNDROME_FRAGMENT_3 + offset,
479 515 regs->elm_syndrome_fragment_3[i]);
include/linux/platform_data/elm.h
Diff comments   View file @ 2be589e
... ... @@ -21,6 +21,7 @@
21 21 enum bch_ecc {
22 22 BCH4_ECC = 0,
23 23 BCH8_ECC,
  24 + BCH16_ECC,
24 25 };
25 26  
26 27 /* ELM support 8 error syndrome process */
... ... @@ -38,7 +39,7 @@
38 39 bool error_reported;
39 40 bool error_uncorrectable;
40 41 int error_count;
41   - int error_loc[ERROR_VECTOR_MAX];
  42 + int error_loc[16];
42 43 };
43 44  
44 45 void elm_decode_bch_error_page(struct device *dev, u8 *ecc_calc,