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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.patch131
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");