@@ -4624,6 +4624,222 @@ nand_manufacturer_name(const struct nand_manufacturer *manufacturer)
return manufacturer ? manufacturer->name : "Unknown";
}
+/* Parse the ONFI parameter Page */
+int nand_onfi_read_op(struct nand_device *base, u8 page, void *buf,
+ unsigned int len)
+{
+ struct nand_chip *chip = device_to_nand(base);
+ struct nand_onfi_params *p = buf;
+ int ret;
+ unsigned int i;
+
+ ret = nand_read_param_page_op(chip, 0, NULL, 0);
+ if (ret)
+ return ret;
+
+ for (i = 0; i < 3; i++) {
+ ret = nand_read_data_op(chip, &p[i], sizeof(*p), true);
+ if (ret)
+ return ret;
+ }
+
+ return 0;
+}
+
+/* Parse the Extended Parameter Page. */
+static int nand_ext_param_page(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;
+ u8 *cursor;
+ int ret;
+ int len;
+ int i;
+
+ /*
+ * The nand_flash_detect_ext_param_page() uses the
+ * Change Read Column command which maybe not supported
+ * by the chip->legacy.cmdfunc. So try to update the
+ * chip->legacy.cmdfunc now. We do not replace user supplied
+ * command function.
+ */
+ nand_legacy_adjust_cmdfunc(chip);
+
+ len = le16_to_cpu(p->ext_param_page_length) * 16;
+ ep = kmalloc(len, GFP_KERNEL);
+ if (!ep)
+ return -ENOMEM;
+
+ /* Send our own NAND_CMD_PARAM. */
+ ret = nand_read_param_page_op(chip, 0, NULL, 0);
+ if (ret)
+ goto ext_out;
+
+ /* Use the Change Read Column command to skip the ONFI param pages. */
+ ret = nand_change_read_column_op(chip,
+ sizeof(*p) * p->num_of_param_pages,
+ ep, len, true);
+ if (ret)
+ goto ext_out;
+
+ ret = -EINVAL;
+ 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) {
+ pr_debug("Invalid codeword size\n");
+ goto ext_out;
+ }
+
+ chip->base.eccreq.strength = ecc->ecc_bits;
+ chip->base.eccreq.step_size = 1 << ecc->codeword_size;
+ ret = 0;
+
+ext_out:
+ kfree(ep);
+ return ret;
+}
+
+static int check_onfi_version(struct nand_device *base,
+ struct nand_onfi_params *p, int *onfi_version)
+{
+ struct nand_chip *chip = device_to_nand(base);
+ int val;
+
+ if (chip->manufacturer.desc && chip->manufacturer.desc->ops &&
+ chip->manufacturer.desc->ops->fixup_onfi_param_page)
+ chip->manufacturer.desc->ops->fixup_onfi_param_page(chip, p);
+
+ /* Check version */
+ val = le16_to_cpu(p->revision);
+ if (val & ONFI_VERSION_2_3)
+ *onfi_version = 23;
+ else if (val & ONFI_VERSION_2_2)
+ *onfi_version = 22;
+ else if (val & ONFI_VERSION_2_1)
+ *onfi_version = 21;
+ else if (val & ONFI_VERSION_2_0)
+ *onfi_version = 20;
+ else if (val & ONFI_VERSION_1_0)
+ *onfi_version = 10;
+
+ if (!(*onfi_version)) {
+ pr_info("unsupported ONFI version: %d\n", val);
+ return -1;
+ }
+
+ return 0;
+}
+
+static int nand_intf_data(struct nand_device *base, struct nand_onfi_params *p)
+{
+ struct nand_chip *chip = device_to_nand(base);
+ struct onfi_params *onfi;
+ int onfi_version;
+ int ret;
+
+ check_onfi_version(base, p, &onfi_version);
+
+ /* The Extended Parameter Page is supported since ONFI 2.1. */
+ if (onfi_version >= 21 &&
+ (le16_to_cpu(p->features) &
+ ONFI_FEATURE_EXT_PARAM_PAGE)) {
+ if (nand_ext_param_page(chip, p))
+ pr_warn("Failed to detect ONFI extended param page\n");
+ }
+
+ chip->parameters.model = kstrdup(p->model, GFP_KERNEL);
+ if (!chip->parameters.model)
+ return -ENOMEM;
+
+ if (le16_to_cpu(p->features) & ONFI_FEATURE_16_BIT_BUS)
+ chip->options |= NAND_BUSWIDTH_16;
+
+ /* Save some parameters from the parameter page for future use */
+ if (le16_to_cpu(p->opt_cmd) & ONFI_OPT_CMD_SET_GET_FEATURES) {
+ chip->parameters.supports_set_get_features = true;
+ bitmap_set(chip->parameters.get_feature_list,
+ ONFI_FEATURE_ADDR_TIMING_MODE, 1);
+ bitmap_set(chip->parameters.set_feature_list,
+ ONFI_FEATURE_ADDR_TIMING_MODE, 1);
+ }
+
+ onfi = kzalloc(sizeof(*onfi), GFP_KERNEL);
+ if (!onfi) {
+ return ret = -ENOMEM;
+ goto free_model;
+ }
+
+ check_onfi_version(base, p, &onfi_version);
+ onfi->version = onfi_version;
+ onfi->tPROG = le16_to_cpu(p->t_prog);
+ onfi->tBERS = le16_to_cpu(p->t_bers);
+ onfi->tR = le16_to_cpu(p->t_r);
+ onfi->tCCS = le16_to_cpu(p->t_ccs);
+ onfi->async_timing_mode = le16_to_cpu(p->async_timing_mode);
+ onfi->vendor_revision = le16_to_cpu(p->vendor_revision);
+ memcpy(onfi->vendor, p->vendor, sizeof(p->vendor));
+ chip->parameters.onfi = onfi;
+
+ return 0;
+
+free_model:
+ kfree(chip->parameters.model);
+
+ return ret;
+}
+
+/*
+ * Check if the NAND chip is ONFI compliant, returns 1 if it is, 0 otherwise.
+ */
+int rawnand_onfi_detect(struct nand_chip *chip)
+{
+ char id[4];
+ int ret;
+
+ /* Try ONFI for unknown chip or LP */
+ ret = nand_readid_op(chip, 0x20, id, sizeof(id));
+ if (ret || strncmp(id, "ONFI", 4))
+ return 0;
+
+ chip->base.helper.page = 0;
+ chip->base.helper.check_revision = check_onfi_version;
+ chip->base.helper.parameter_page_read = nand_onfi_read_op;
+ chip->base.helper.init_intf_data = nand_intf_data;
+
+ return nand_onfi_detect(&chip->base);
+}
+
/*
* Get the flash and manufacturer id and lookup if the type is supported.
*/
@@ -4719,7 +4935,7 @@ static int nand_detect(struct nand_chip *chip, struct nand_flash_dev *type)
if (!type->name || !type->pagesize) {
/* Check if the chip is ONFI compliant */
- ret = nand_onfi_detect(&chip->base);
+ ret = rawnand_onfi_detect(chip);
if (ret < 0)
return ret;
else if (ret)
@@ -15,8 +15,6 @@
#include <linux/slab.h>
#include <linux/mtd/nand.h>
-#include "internals.h"
-
u16 onfi_crc16(u16 crc, u8 const *p, size_t len)
{
int i;
@@ -29,81 +27,6 @@ u16 onfi_crc16(u16 crc, u8 const *p, size_t len)
return crc;
}
-/* Parse the Extended Parameter Page. */
-static int nand_flash_detect_ext_param_page(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;
- int len;
- int i;
-
- len = le16_to_cpu(p->ext_param_page_length) * 16;
- ep = kmalloc(len, GFP_KERNEL);
- if (!ep)
- return -ENOMEM;
-
- /* Send our own NAND_CMD_PARAM. */
- ret = nand_read_param_page_op(chip, 0, NULL, 0);
- if (ret)
- goto ext_out;
-
- /* Use the Change Read Column command to skip the ONFI param pages. */
- ret = nand_change_read_column_op(chip,
- sizeof(*p) * p->num_of_param_pages,
- ep, len, true);
- if (ret)
- goto ext_out;
-
- ret = -EINVAL;
- 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) {
- pr_debug("Invalid codeword size\n");
- goto ext_out;
- }
-
- chip->base.eccreq.strength = ecc->ecc_bits;
- chip->base.eccreq.step_size = 1 << ecc->codeword_size;
- ret = 0;
-
-ext_out:
- kfree(ep);
- return ret;
-}
-
/*
* Recover data with bit-wise majority
*/
@@ -158,40 +81,34 @@ void sanitize_string(u8 *s, size_t len)
*/
int nand_onfi_detect(struct nand_device *base)
{
- struct nand_chip *chip = device_to_nand(base);
struct mtd_info *mtd = &base->mtd;
struct nand_memory_organization *memorg;
struct nand_onfi_params *p;
- struct onfi_params *onfi;
int onfi_version = 0;
- char id[4];
- int i, ret, val;
+ int i, ret;
memorg = nanddev_get_memorg(base);
- /* Try ONFI for unknown chip or LP */
- ret = nand_readid_op(chip, 0x20, id, sizeof(id));
- if (ret || strncmp(id, "ONFI", 4))
+ /* return 0, if ONFI helper functions are not defined */
+ if (!base->helper.parameter_page_read &&
+ !base->helper.check_revision &&
+ !base->helper.init_intf_data) {
return 0;
+ }
/* ONFI chip: allocate a buffer to hold its parameter page */
- p = kzalloc((sizeof(*p) * 3), GFP_KERNEL);
+ p = kzalloc(sizeof(*p) * 3, GFP_KERNEL);
if (!p)
return -ENOMEM;
- ret = nand_read_param_page_op(chip, 0, NULL, 0);
+ ret = base->helper.parameter_page_read(base, base->helper.page,
+ p, sizeof(*p) * 3);
if (ret) {
ret = 0;
goto free_onfi_param_page;
}
for (i = 0; i < 3; i++) {
- ret = nand_read_data_op(chip, &p[i], sizeof(*p), true);
- if (ret) {
- ret = 0;
- goto free_onfi_param_page;
- }
-
if (onfi_crc16(ONFI_CRC_BASE, (u8 *)&p[i], 254) ==
le16_to_cpu(p->crc)) {
if (i)
@@ -214,35 +131,14 @@ int nand_onfi_detect(struct nand_device *base)
}
}
- if (chip->manufacturer.desc && chip->manufacturer.desc->ops &&
- chip->manufacturer.desc->ops->fixup_onfi_param_page)
- chip->manufacturer.desc->ops->fixup_onfi_param_page(chip, p);
-
- /* Check version */
- val = le16_to_cpu(p->revision);
- if (val & ONFI_VERSION_2_3)
- onfi_version = 23;
- else if (val & ONFI_VERSION_2_2)
- onfi_version = 22;
- else if (val & ONFI_VERSION_2_1)
- onfi_version = 21;
- else if (val & ONFI_VERSION_2_0)
- onfi_version = 20;
- else if (val & ONFI_VERSION_1_0)
- onfi_version = 10;
-
- if (!onfi_version) {
- pr_info("unsupported ONFI version: %d\n", val);
+ ret = base->helper.check_revision(base, p, &onfi_version);
+ if (ret) {
+ ret = 0;
goto free_onfi_param_page;
}
sanitize_string(p->manufacturer, sizeof(p->manufacturer));
sanitize_string(p->model, sizeof(p->model));
- chip->parameters.model = kstrdup(p->model, GFP_KERNEL);
- if (!chip->parameters.model) {
- ret = -ENOMEM;
- goto free_onfi_param_page;
- }
memorg->pagesize = le32_to_cpu(p->byte_per_page);
mtd->writesize = memorg->pagesize;
@@ -268,63 +164,14 @@ int nand_onfi_detect(struct nand_device *base)
memorg->max_bad_eraseblocks_per_lun = le32_to_cpu(p->blocks_per_lun);
memorg->bits_per_cell = p->bits_per_cell;
- if (le16_to_cpu(p->features) & ONFI_FEATURE_16_BIT_BUS)
- chip->options |= NAND_BUSWIDTH_16;
-
if (p->ecc_bits != 0xff) {
- chip->base.eccreq.strength = p->ecc_bits;
- chip->base.eccreq.step_size = 512;
- } else if (onfi_version >= 21 &&
- (le16_to_cpu(p->features) & 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->legacy.cmdfunc. So try to update the
- * chip->legacy.cmdfunc now. We do not replace user supplied
- * command function.
- */
- nand_legacy_adjust_cmdfunc(chip);
-
- /* The Extended Parameter Page is supported since ONFI 2.1. */
- if (nand_flash_detect_ext_param_page(chip, p))
- pr_warn("Failed to detect ONFI extended param page\n");
- } else {
- pr_warn("Could not retrieve ONFI ECC requirements\n");
+ base->eccreq.strength = p->ecc_bits;
+ base->eccreq.step_size = 512;
}
- /* Save some parameters from the parameter page for future use */
- if (le16_to_cpu(p->opt_cmd) & ONFI_OPT_CMD_SET_GET_FEATURES) {
- chip->parameters.supports_set_get_features = true;
- bitmap_set(chip->parameters.get_feature_list,
- ONFI_FEATURE_ADDR_TIMING_MODE, 1);
- bitmap_set(chip->parameters.set_feature_list,
- ONFI_FEATURE_ADDR_TIMING_MODE, 1);
- }
-
- onfi = kzalloc(sizeof(*onfi), GFP_KERNEL);
- if (!onfi) {
- ret = -ENOMEM;
- goto free_model;
- }
-
- onfi->version = onfi_version;
- onfi->tPROG = le16_to_cpu(p->t_prog);
- onfi->tBERS = le16_to_cpu(p->t_bers);
- onfi->tR = le16_to_cpu(p->t_r);
- onfi->tCCS = le16_to_cpu(p->t_ccs);
- onfi->async_timing_mode = le16_to_cpu(p->async_timing_mode);
- onfi->vendor_revision = le16_to_cpu(p->vendor_revision);
- memcpy(onfi->vendor, p->vendor, sizeof(p->vendor));
- chip->parameters.onfi = onfi;
+ ret = base->helper.init_intf_data(base, p);
/* Identification done, free the full ONFI parameter page and exit */
- kfree(p);
-
- return 1;
-
-free_model:
- kfree(chip->parameters.model);
free_onfi_param_page:
kfree(p);
Instantiate the onfi_helper object for raw NAND and turn ONFI support to generic. Later this generic ONFI code will be used by SPI NAND as well. Signed-off-by: Shivamurthy Shastri <sshivamurthy@micron.com> --- drivers/mtd/nand/raw/nand_base.c | 218 ++++++++++++++++++++++++++++++- drivers/mtd/nand/raw/nand_onfi.c | 183 +++----------------------- 2 files changed, 232 insertions(+), 169 deletions(-)