[PATCH 03/29] pxa3xx_nand: introduce default timing to reduce

read id times

We certainly don't need to send read id command times by times, since
we already know what the id is after the first read id...

So create a default timing which could ensure it would successfully read
id out all supported chip. Then follow the build-in table to reconfigure
the timing.

Signed-off-by: Lei Wen <redacted>
Signed-off-by: Haojian Zhuang <redacted>
---
 drivers/mtd/nand/pxa3xx_nand.c |   56 ++++++++++++++++++---------------------
 1 files changed, 26 insertions(+), 30 deletions(-)

diff --git a/drivers/mtd/nand/pxa3xx_nand.c b/drivers/mtd/nand/pxa3xx_nand.c
index 52cec28..b605147 100644
--- a/drivers/mtd/nand/pxa3xx_nand.c
+++ b/drivers/mtd/nand/pxa3xx_nand.c

@@ -190,15 +190,18 @@ static struct pxa3xx_nand_cmdset default_cmdset = {
 };

 static struct pxa3xx_nand_timing __devinitdata timing[] = {
-	{ 10,  0, 20, 40, 30, 40, 11123, 110, 10, },
-	{ 10, 25, 15, 25, 15, 30, 25000,  60, 10, },
-	{ 10, 35, 15, 25, 15, 25, 25000,  60, 10, },
+	{ 40, 80, 60, 100, 80, 100, 90000, 400, 40, },
+	{ 10,  0, 20,  40, 30,  40, 11123, 110, 10, },
+	{ 10, 25, 15,  25, 15,  30, 25000,  60, 10, },
+	{ 10, 35, 15,  25, 15,  25, 25000,  60, 10, },
 };

-#define NAND_SETTING_SAMSUNG     &default_cmdset, &timing[0]
-#define NAND_SETTING_MICRON      &default_cmdset, &timing[1]
-#define NAND_SETTING_ST          &default_cmdset, &timing[2]
+#define NAND_SETTING_DEFAULT     &default_cmdset, &timing[0]
+#define NAND_SETTING_SAMSUNG     &default_cmdset, &timing[1]
+#define NAND_SETTING_MICRON      &default_cmdset, &timing[2]
+#define NAND_SETTING_ST          &default_cmdset, &timing[3]
 static struct pxa3xx_nand_flash __devinitdata builtin_flash_types[] = {
+	{      0,   0, 2048,  8,  8,    0, NAND_SETTING_DEFAULT, },
 	{ 0x46ec,  32,  512, 16, 16, 4096, NAND_SETTING_SAMSUNG, },
 	{ 0xdaec,  64, 2048,  8,  8, 2048, NAND_SETTING_SAMSUNG, },
 	{ 0xd7ec, 128, 4096,  8,  8, 8192, NAND_SETTING_SAMSUNG, },

@@ -948,36 +951,29 @@ static int pxa3xx_nand_detect_flash(struct

pxa3xx_nand_info *info,
 		if (pxa3xx_nand_detect_config(info) == 0)
 			return 0;

-	for (i = 0; i<pdata->num_flash; ++i) {
-		f = pdata->flash + i;
-
-		if (pxa3xx_nand_config_flash(info, f))
-			continue;
-
-		if (__readid(info, &id))
-			continue;
-
-		if (id == f->chip_id)
-			return 0;
-	}
-
-	for (i = 0; i < ARRAY_SIZE(builtin_flash_types); i++) {
-
-		f = &builtin_flash_types[i];
-
-		if (pxa3xx_nand_config_flash(info, f))
-			continue;
-
-		if (__readid(info, &id))
-			continue;
-
-		if (id == f->chip_id)
+	/* we use default timing to detect id */
+	f = &builtin_flash_types[0];
+	pxa3xx_nand_config_flash(info, f);
+	if (__readid(info, &id))
+		goto fail_detect;
+
+	for (i=0; i<ARRAY_SIZE(builtin_flash_types) + pdata->num_flash - 1; i++) {
+		/* we first choose the flash definition from platfrom */
+		if (i < pdata->num_flash)
+			f = pdata->flash + i;
+		else
+			f = &builtin_flash_types[i - pdata->num_flash + 1];
+		if (f->chip_id == id) {
+			dev_info(&info->pdev->dev, "detect chip id: 0x%x\n", id);
+			pxa3xx_nand_config_flash(info, f);
 			return 0;
+		}
 	}

 	dev_warn(&info->pdev->dev,
 		 "failed to detect configured nand flash; found %04x instead of\n",
 		 id);
+fail_detect:
 	return -ENODEV;
 }

-- 
1.7.0.4