Hi Boris,
On 2/8/19 10:51 pm, Boris Brezillon wrote:
On Fri, 2 Aug 2019 22:34:57 +1000
Greg Ungerer <gerg@xxxxxxxxxx> wrote:
On 31/7/19 4:28 pm, Boris Brezillon wrote:
On Wed, 31 Jul 2019 12:05:44 +1000
Greg Ungerer <gerg@xxxxxxxxxx> wrote:
On 30/7/19 6:38 pm, Miquel Raynal wrote:
Greg Ungerer <gerg@xxxxxxxxxx> wrote on Tue, 30 Jul 2019 16:06:55 +1000:
On 30/7/19 10:41 am, Greg Ungerer wrote:
On 30/7/19 10:28 am, Greg Ungerer wrote:
On 29/7/19 10:47 pm, Miquel Raynal wrote:
Greg Ungerer <gerg@xxxxxxxxxx> wrote on Mon, 29 Jul 2019 22:33:56 +1000:
On 29/7/19 6:36 pm, Miquel Raynal wrote:
Greg Ungerer <gerg@xxxxxxxxxx> wrote on Mon, 29 Jul 2019 16:41:51 +1000:
[snip]
Note that this was generated on a normal boot up (not failure).
The values looks good. Can you try with the below diff applied?
--->8---
diff --git a/drivers/mtd/nand/raw/gpmi-nand/gpmi-nand.c b/drivers/mtd/nand/raw/gpmi-nand/gpmi-nand.c
index 334fe3130285..9771f6a82abe 100644
--- a/drivers/mtd/nand/raw/gpmi-nand/gpmi-nand.c
+++ b/drivers/mtd/nand/raw/gpmi-nand/gpmi-nand.c
@@ -721,12 +721,10 @@ static void gpmi_nfc_apply_timings(struct gpmi_nand_data *this)
writel(hw->ctrl1n, gpmi_regs + HW_GPMI_CTRL1_SET);
/* Wait 64 clock cycles before using the GPMI after enabling the DLL */
- dll_wait_time_us = USEC_PER_SEC / hw->clk_rate * 64;
- if (!dll_wait_time_us)
- dll_wait_time_us = 1;
+ dll_wait_time_us = DIV_ROUND_UP(USEC_PER_SEC * 64, hw->clk_rate);
/* Wait for the DLL to settle. */
- udelay(dll_wait_time_us);
+ usleep_range(dll_wait_time_us, dll_wait_time_us * 10);
}
static int gpmi_setup_data_interface(struct nand_chip *chip, int chipnr,
Eventually it failed, in the same way with with same errors.
Took quite a while, over 600 boot cycles.
Note also that I had to hand merge the changes, since in 5.1.14 that
gpmi_nfc_apply_timings() is in gpmi-lib.c. But it was trivial to do.
Oh well. I guess the next thing to do would be to dump the timing regs
and clk rate that are set by the bootloader (before the driver override
them) or those applied by an older kernel (one that didn't have that
issue).
Is this useful?
With attached patch, I get the following dump of the timing
settings in use:
...
drivers/mtd/nand/raw/gpmi-nand/gpmi-lib.c(490): gpmi_nfc_apply_timings()
HW_GPMI_TIMING0=0x00010203 (calculated=0x00020101)
HW_GPMI_TIMING1=0x00000000 (calculated=0x60000000)
HW_GPMI_CTRL1_SET=0x01c4000c (calculated=0x00000000)
r->clock[0]=22000000 (calculated=22000000)
random: fast init done
nand: device found, Manufacturer ID: 0x2c, Chip ID: 0xda
nand: Micron MT29F2G08ABAEAWP
nand: 256 MiB, SLC, erase size: 128 KiB, page size: 2048, OOB size: 64
drivers/mtd/nand/raw/gpmi-nand/gpmi-lib.c(490): gpmi_nfc_apply_timings()
HW_GPMI_TIMING0=0x00010203 (calculated=0x00020101)
HW_GPMI_TIMING1=0x00000000 (calculated=0xb0000000)
HW_GPMI_CTRL1_SET=0x01c4000c (calculated=0x00000000)
r->clock[0]=22000000 (calculated=22000000)
drivers/mtd/nand/raw/gpmi-nand/gpmi-lib.c(490): gpmi_nfc_apply_timings()
HW_GPMI_TIMING0=0x00010203 (calculated=0x00010101)
HW_GPMI_TIMING1=0x00000000 (calculated=0xe0000000)
HW_GPMI_CTRL1_SET=0x01c4000c (calculated=0x00c28000)
r->clock[0]=22000000 (calculated=100000000)
Scanning device for bad blocks
5 fixed-partitions partitions found on MTD device gpmi-nand
Creating 5 MTD partitions on "gpmi-nand":
0x000000000000-0x000000500000 : "u-boot"
0x000000500000-0x000000600000 : "u-boot-env"
0x000000600000-0x000000800000 : "log"
0x000000800000-0x000010000000 : "flash"
0x000000000000-0x000010000000 : "all"
gpmi-nand 1806000.gpmi-nand: driver registered.
...
Regards
Greg
--- a/drivers/mtd/nand/raw/gpmi-nand/gpmi-lib.c 2019-03-06 15:47:24.310993476 +1000
+++ b/drivers/mtd/nand/raw/gpmi-nand/gpmi-lib.c 2019-08-05 15:04:49.241345883 +1000
@@ -486,6 +486,14 @@
void __iomem *gpmi_regs = r->gpmi_regs;
unsigned int dll_wait_time_us;
+#if 1
+ printk("%s(%d): gpmi_nfc_apply_timings()\n", __FILE__, __LINE__);
+ printk(" HW_GPMI_TIMING0=0x%08x (calculated=0x%08x)\n", readl(gpmi_regs + HW_GPMI_TIMING0), hw->timing0);
+ printk(" HW_GPMI_TIMING1=0x%08x (calculated=0x%08x)\n", readl(gpmi_regs + HW_GPMI_TIMING1), hw->timing1);
+ printk(" HW_GPMI_CTRL1_SET=0x%08x (calculated=0x%08x)\n", readl(gpmi_regs + HW_GPMI_CTRL1_SET), hw->ctrl1n);
+ printk(" r->clock[0]=%d (calculated=%d)\n", clk_get_rate(r->clock[0]), hw->clk_rate);
+#endif
+#if 0
clk_set_rate(r->clock[0], hw->clk_rate);
writel(hw->timing0, gpmi_regs + HW_GPMI_TIMING0);
@@ -505,6 +513,7 @@
/* Wait for the DLL to settle. */
udelay(dll_wait_time_us);
+#endif
}
int gpmi_setup_data_interface(struct nand_chip *chip, int chipnr,
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