diff options
Diffstat (limited to 'target/linux/mvebu/patches-3.10/0094-mtd-get-the-ECC-info-from-the-Extended-Parameter-Pag.patch')
| -rw-r--r-- | target/linux/mvebu/patches-3.10/0094-mtd-get-the-ECC-info-from-the-Extended-Parameter-Pag.patch | 131 |
1 files changed, 0 insertions, 131 deletions
diff --git a/target/linux/mvebu/patches-3.10/0094-mtd-get-the-ECC-info-from-the-Extended-Parameter-Pag.patch b/target/linux/mvebu/patches-3.10/0094-mtd-get-the-ECC-info-from-the-Extended-Parameter-Pag.patch deleted file mode 100644 index b3969e1..0000000 --- a/target/linux/mvebu/patches-3.10/0094-mtd-get-the-ECC-info-from-the-Extended-Parameter-Pag.patch +++ /dev/null @@ -1,131 +0,0 @@ -From f617846b1e20a2ba59cdd9435715339eaed1e251 Mon Sep 17 00:00:00 2001 -From: Huang Shijie <b32955@freescale.com> -Date: Wed, 22 May 2013 10:28:27 +0800 -Subject: [PATCH 094/203] mtd: get the ECC info from the Extended Parameter - Page - -Since the ONFI 2.1, the onfi spec adds the Extended Parameter Page -to store the ECC info. - -The onfi spec tells us that if the nand chip's recommended ECC codeword -size is not 512 bytes, then the @ecc_bits is 0xff. The host _SHOULD_ then -read the Extended ECC information that is part of the extended parameter -page to retrieve the ECC requirements for this device. - -This patch implement the reading of the Extended Parameter Page, and parses -the sections for ECC type, and get the ECC info from the ECC section. - -Tested this patch with Micron MT29F64G08CBABAWP. - -Acked-by: Pekon Gupta <pekon@ti.com> -Signed-off-by: Huang Shijie <b32955@freescale.com> -Reviewed-and-tested-by: Brian Norris <computersforpeace@gmail.com> -Signed-off-by: Brian Norris <computersforpeace@gmail.com> -Signed-off-by: David Woodhouse <David.Woodhouse@intel.com> ---- - drivers/mtd/nand/nand_base.c | 87 ++++++++++++++++++++++++++++++++++++++++++++ - 1 file changed, 87 insertions(+) - ---- a/drivers/mtd/nand/nand_base.c -+++ b/drivers/mtd/nand/nand_base.c -@@ -2848,6 +2848,78 @@ static u16 onfi_crc16(u16 crc, u8 const - return crc; - } - -+/* Parse the Extended Parameter Page. */ -+static int nand_flash_detect_ext_param_page(struct mtd_info *mtd, -+ struct nand_chip *chip, struct nand_onfi_params *p) -+{ -+ struct onfi_ext_param_page *ep; -+ struct onfi_ext_section *s; -+ struct onfi_ext_ecc_info *ecc; -+ uint8_t *cursor; -+ int ret = -EINVAL; -+ int len; -+ int i; -+ -+ len = le16_to_cpu(p->ext_param_page_length) * 16; -+ ep = kmalloc(len, GFP_KERNEL); -+ if (!ep) { -+ ret = -ENOMEM; -+ goto ext_out; -+ } -+ -+ /* Send our own NAND_CMD_PARAM. */ -+ chip->cmdfunc(mtd, NAND_CMD_PARAM, 0, -1); -+ -+ /* Use the Change Read Column command to skip the ONFI param pages. */ -+ chip->cmdfunc(mtd, NAND_CMD_RNDOUT, -+ sizeof(*p) * p->num_of_param_pages , -1); -+ -+ /* Read out the Extended Parameter Page. */ -+ chip->read_buf(mtd, (uint8_t *)ep, len); -+ if ((onfi_crc16(ONFI_CRC_BASE, ((uint8_t *)ep) + 2, len - 2) -+ != le16_to_cpu(ep->crc))) { -+ pr_debug("fail in the CRC.\n"); -+ goto ext_out; -+ } -+ -+ /* -+ * Check the signature. -+ * Do not strictly follow the ONFI spec, maybe changed in future. -+ */ -+ if (strncmp(ep->sig, "EPPS", 4)) { -+ pr_debug("The signature is invalid.\n"); -+ goto ext_out; -+ } -+ -+ /* find the ECC section. */ -+ cursor = (uint8_t *)(ep + 1); -+ for (i = 0; i < ONFI_EXT_SECTION_MAX; i++) { -+ s = ep->sections + i; -+ if (s->type == ONFI_SECTION_TYPE_2) -+ break; -+ cursor += s->length * 16; -+ } -+ if (i == ONFI_EXT_SECTION_MAX) { -+ pr_debug("We can not find the ECC section.\n"); -+ goto ext_out; -+ } -+ -+ /* get the info we want. */ -+ ecc = (struct onfi_ext_ecc_info *)cursor; -+ -+ if (ecc->codeword_size) { -+ chip->ecc_strength_ds = ecc->ecc_bits; -+ chip->ecc_step_ds = 1 << ecc->codeword_size; -+ } -+ -+ pr_info("ONFI extended param page detected.\n"); -+ return 0; -+ -+ext_out: -+ kfree(ep); -+ return ret; -+} -+ - /* - * Check if the NAND chip is ONFI compliant, returns 1 if it is, 0 otherwise. - */ -@@ -2927,6 +2999,21 @@ static int nand_flash_detect_onfi(struct - if (p->ecc_bits != 0xff) { - chip->ecc_strength_ds = p->ecc_bits; - chip->ecc_step_ds = 512; -+ } else if (chip->onfi_version >= 21 && -+ (onfi_feature(chip) & ONFI_FEATURE_EXT_PARAM_PAGE)) { -+ -+ /* -+ * The nand_flash_detect_ext_param_page() uses the -+ * Change Read Column command which maybe not supported -+ * by the chip->cmdfunc. So try to update the chip->cmdfunc -+ * now. We do not replace user supplied command function. -+ */ -+ if (mtd->writesize > 512 && chip->cmdfunc == nand_command) -+ chip->cmdfunc = nand_command_lp; -+ -+ /* The Extended Parameter Page is supported since ONFI 2.1. */ -+ if (nand_flash_detect_ext_param_page(mtd, chip, p)) -+ pr_info("Failed to detect the extended param page.\n"); - } - - pr_info("ONFI flash detected\n"); |