Merge tag 'v4.10-rc2' into drm-intel-next-queued

Backmerge Linux 4.10-rc2 to resync with our -fixes cherry-picks. I've
done the backmerge directly because Dave is on vacation.

Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>

1 files changed, 66 insertions, 18 deletions

diff --git a/drivers/mtd/nand/nand_base.c b/drivers/mtd/nand/nand_base.c
index 3bde96a3f7bf..ec1c28aaaf23 100644
--- a/drivers/mtd/nand/nand_base.c
+++ b/drivers/mtd/nand/nand_base.c
@@ -709,6 +709,25 @@ static void nand_command(struct mtd_info *mtd, unsigned int command,
 	nand_wait_ready(mtd);
 }
 
+static void nand_ccs_delay(struct nand_chip *chip)
+{
+	/*
+	 * The controller already takes care of waiting for tCCS when the RNDIN
+	 * or RNDOUT command is sent, return directly.
+	 */
+	if (!(chip->options & NAND_WAIT_TCCS))
+		return;
+
+	/*
+	 * Wait tCCS_min if it is correctly defined, otherwise wait 500ns
+	 * (which should be safe for all NANDs).
+	 */
+	if (chip->data_interface && chip->data_interface->timings.sdr.tCCS_min)
+		ndelay(chip->data_interface->timings.sdr.tCCS_min / 1000);
+	else
+		ndelay(500);
+}
+
 /**
  * nand_command_lp - [DEFAULT] Send command to NAND large page device
  * @mtd: MTD device structure
@@ -773,10 +792,13 @@ static void nand_command_lp(struct mtd_info *mtd, unsigned int command,
 	case NAND_CMD_ERASE1:
 	case NAND_CMD_ERASE2:
 	case NAND_CMD_SEQIN:
-	case NAND_CMD_RNDIN:
 	case NAND_CMD_STATUS:
 		return;
 
+	case NAND_CMD_RNDIN:
+		nand_ccs_delay(chip);
+		return;
+
 	case NAND_CMD_RESET:
 		if (chip->dev_ready)
 			break;
@@ -795,6 +817,8 @@ static void nand_command_lp(struct mtd_info *mtd, unsigned int command,
 			       NAND_NCE | NAND_CLE | NAND_CTRL_CHANGE);
 		chip->cmd_ctrl(mtd, NAND_CMD_NONE,
 			       NAND_NCE | NAND_CTRL_CHANGE);
+
+		nand_ccs_delay(chip);
 		return;
 
 	case NAND_CMD_READ0:
@@ -1946,7 +1970,8 @@ static int nand_do_read_ops(struct mtd_info *mtd, loff_t from,
 						 __func__, buf);
 
 read_retry:
-			chip->cmdfunc(mtd, NAND_CMD_READ0, 0x00, page);
+			if (nand_standard_page_accessors(&chip->ecc))
+				chip->cmdfunc(mtd, NAND_CMD_READ0, 0x00, page);
 
 			/*
 			 * Now read the page into the buffer.  Absent an error,
@@ -2634,7 +2659,8 @@ static int nand_write_page(struct mtd_info *mtd, struct nand_chip *chip,
 	else
 		subpage = 0;
 
-	chip->cmdfunc(mtd, NAND_CMD_SEQIN, 0x00, page);
+	if (nand_standard_page_accessors(&chip->ecc))
+		chip->cmdfunc(mtd, NAND_CMD_SEQIN, 0x00, page);
 
 	if (unlikely(raw))
 		status = chip->ecc.write_page_raw(mtd, chip, buf,
@@ -2657,7 +2683,8 @@ static int nand_write_page(struct mtd_info *mtd, struct nand_chip *chip,
 
 	if (!cached || !NAND_HAS_CACHEPROG(chip)) {
 
-		chip->cmdfunc(mtd, NAND_CMD_PAGEPROG, -1, -1);
+		if (nand_standard_page_accessors(&chip->ecc))
+			chip->cmdfunc(mtd, NAND_CMD_PAGEPROG, -1, -1);
 		status = chip->waitfunc(mtd, chip);
 		/*
 		 * See if operation failed and additional status checks are
@@ -3985,10 +4012,9 @@ static bool find_full_id_nand(struct mtd_info *mtd, struct nand_chip *chip,
 /*
  * Get the flash and manufacturer id and lookup if the type is supported.
  */
-static struct nand_flash_dev *nand_get_flash_type(struct mtd_info *mtd,
-						  struct nand_chip *chip,
-						  int *maf_id, int *dev_id,
-						  struct nand_flash_dev *type)
+static int nand_get_flash_type(struct mtd_info *mtd, struct nand_chip *chip,
+			       int *maf_id, int *dev_id,
+			       struct nand_flash_dev *type)
 {
 	int busw;
 	int i, maf_idx;
@@ -4026,7 +4052,7 @@ static struct nand_flash_dev *nand_get_flash_type(struct mtd_info *mtd,
 	if (id_data[0] != *maf_id || id_data[1] != *dev_id) {
 		pr_info("second ID read did not match %02x,%02x against %02x,%02x\n",
 			*maf_id, *dev_id, id_data[0], id_data[1]);
-		return ERR_PTR(-ENODEV);
+		return -ENODEV;
 	}
 
 	if (!type)
@@ -4053,7 +4079,7 @@ static struct nand_flash_dev *nand_get_flash_type(struct mtd_info *mtd,
 	}
 
 	if (!type->name)
-		return ERR_PTR(-ENODEV);
+		return -ENODEV;
 
 	if (!mtd->name)
 		mtd->name = type->name;
@@ -4098,7 +4124,7 @@ ident_done:
 		pr_warn("bus width %d instead %d bit\n",
 			   (chip->options & NAND_BUSWIDTH_16) ? 16 : 8,
 			   busw ? 16 : 8);
-		return ERR_PTR(-EINVAL);
+		return -EINVAL;
 	}
 
 	nand_decode_bbm_options(mtd, chip, id_data);
@@ -4140,7 +4166,7 @@ ident_done:
 	pr_info("%d MiB, %s, erase size: %d KiB, page size: %d, OOB size: %d\n",
 		(int)(chip->chipsize >> 20), nand_is_slc(chip) ? "SLC" : "MLC",
 		mtd->erasesize >> 10, mtd->writesize, mtd->oobsize);
-	return type;
+	return 0;
 }
 
 static const char * const nand_ecc_modes[] = {
@@ -4306,7 +4332,6 @@ int nand_scan_ident(struct mtd_info *mtd, int maxchips,
 {
 	int i, nand_maf_id, nand_dev_id;
 	struct nand_chip *chip = mtd_to_nand(mtd);
-	struct nand_flash_dev *type;
 	int ret;
 
 	ret = nand_dt_init(chip);
@@ -4329,14 +4354,12 @@ int nand_scan_ident(struct mtd_info *mtd, int maxchips,
 	nand_set_defaults(chip, chip->options & NAND_BUSWIDTH_16);
 
 	/* Read the flash type */
-	type = nand_get_flash_type(mtd, chip, &nand_maf_id,
-				   &nand_dev_id, table);
-
-	if (IS_ERR(type)) {
+	ret = nand_get_flash_type(mtd, chip, &nand_maf_id, &nand_dev_id, table);
+	if (ret) {
 		if (!(chip->options & NAND_SCAN_SILENT_NODEV))
 			pr_warn("No NAND device found\n");
 		chip->select_chip(mtd, -1);
-		return PTR_ERR(type);
+		return ret;
 	}
 
 	/* Initialize the ->data_interface field. */
@@ -4515,6 +4538,26 @@ static bool nand_ecc_strength_good(struct mtd_info *mtd)
 	return corr >= ds_corr && ecc->strength >= chip->ecc_strength_ds;
 }
 
+static bool invalid_ecc_page_accessors(struct nand_chip *chip)
+{
+	struct nand_ecc_ctrl *ecc = &chip->ecc;
+
+	if (nand_standard_page_accessors(ecc))
+		return false;
+
+	/*
+	 * NAND_ECC_CUSTOM_PAGE_ACCESS flag is set, make sure the NAND
+	 * controller driver implements all the page accessors because
+	 * default helpers are not suitable when the core does not
+	 * send the READ0/PAGEPROG commands.
+	 */
+	return (!ecc->read_page || !ecc->write_page ||
+		!ecc->read_page_raw || !ecc->write_page_raw ||
+		(NAND_HAS_SUBPAGE_READ(chip) && !ecc->read_subpage) ||
+		(NAND_HAS_SUBPAGE_WRITE(chip) && !ecc->write_subpage &&
+		 ecc->hwctl && ecc->calculate));
+}
+
 /**
  * nand_scan_tail - [NAND Interface] Scan for the NAND device
  * @mtd: MTD device structure
@@ -4535,6 +4578,11 @@ int nand_scan_tail(struct mtd_info *mtd)
 		   !(chip->bbt_options & NAND_BBT_USE_FLASH)))
 		return -EINVAL;
 
+	if (invalid_ecc_page_accessors(chip)) {
+		pr_err("Invalid ECC page accessors setup\n");
+		return -EINVAL;
+	}
+
 	if (!(chip->options & NAND_OWN_BUFFERS)) {
 		nbuf = kzalloc(sizeof(*nbuf) + mtd->writesize
 				+ mtd->oobsize * 3, GFP_KERNEL);