#include <common.h>
#include <asm/io.h>
-#include <asm/errno.h>
-#include <linux/mtd/omap_gpmc.h>
-#include <asm/omap_elm.h>
+#include <linux/errno.h>
+#include <linux/mtd/omap_elm.h>
#include <asm/arch/hardware.h>
+#define DRIVER_NAME "omap-elm"
#define ELM_DEFAULT_POLY (0)
struct elm *elm_cfg;
/**
- * elm_load_syndromes - Load BCH syndromes based on nibble selection
+ * elm_load_syndromes - Load BCH syndromes based on bch_type selection
* @syndrome: BCH syndrome
- * @nibbles:
+ * @bch_type: BCH4/BCH8/BCH16
* @poly: Syndrome Polynomial set to use
- *
- * Load BCH syndromes based on nibble selection
*/
-static void elm_load_syndromes(u8 *syndrome, u32 nibbles, u8 poly)
+static void elm_load_syndromes(u8 *syndrome, enum bch_level bch_type, u8 poly)
{
u32 *ptr;
u32 val;
(syndrome[7] << 24);
writel(val, ptr);
- /* BCH 8-bit with 26 nibbles (4*8=32) */
- if (nibbles > 13) {
+ if (bch_type == BCH_8_BIT || bch_type == BCH_16_BIT) {
/* reg 2 */
ptr = &elm_cfg->syndrome_fragments[poly].syndrome_fragment_x[2];
val = syndrome[8] | (syndrome[9] << 8) | (syndrome[10] << 16) |
writel(val, ptr);
}
- /* BCH 16-bit with 52 nibbles (7*8=56) */
- if (nibbles > 26) {
+ if (bch_type == BCH_16_BIT) {
/* reg 4 */
ptr = &elm_cfg->syndrome_fragments[poly].syndrome_fragment_x[4];
val = syndrome[16] | (syndrome[17] << 8) |
/**
* elm_check_errors - Check for BCH errors and return error locations
* @syndrome: BCH syndrome
- * @nibbles:
+ * @bch_type: BCH4/BCH8/BCH16
* @error_count: Returns number of errrors in the syndrome
* @error_locations: Returns error locations (in decimal) in this array
*
* and locations in the array passed. Returns -1 if error is not correctable,
* else returns 0
*/
-int elm_check_error(u8 *syndrome, u32 nibbles, u32 *error_count,
+int elm_check_error(u8 *syndrome, enum bch_level bch_type, u32 *error_count,
u32 *error_locations)
{
u8 poly = ELM_DEFAULT_POLY;
s8 i;
u32 location_status;
- elm_load_syndromes(syndrome, nibbles, poly);
+ elm_load_syndromes(syndrome, bch_type, poly);
/* start processing */
writel((readl(&elm_cfg->syndrome_fragments[poly].syndrome_fragment_x[6])
/* check if correctable */
location_status = readl(&elm_cfg->error_location[poly].location_status);
- if (!(location_status & ELM_LOCATION_STATUS_ECC_CORRECTABLE_MASK))
- return -1;
+ if (!(location_status & ELM_LOCATION_STATUS_ECC_CORRECTABLE_MASK)) {
+ printf("%s: uncorrectable ECC errors\n", DRIVER_NAME);
+ return -EBADMSG;
+ }
/* get error count */
*error_count = readl(&elm_cfg->error_location[poly].location_status) &