[LEDE-DEV] mt7621 nand driver status.

[Kenneth Johansson]

On 2016-08-24 13:49, John Crispin wrote:
>
> On 24/08/2016 13:44, Kenneth Johansson wrote:
>> On 2016-08-24 13:32, John Crispin wrote:
>>> On 24/08/2016 13:25, Kenneth Johansson wrote:
>>>> What is the status of the nand driver for mt7621 ??
>>>>
>>>> when I try to use it the probing is ok but it fails when I try to
>>>> read/write.
>>>>
>>>>
>>> known to be working and i used it on the ERX just last week. what
>>> specifc board is this and can you post your dts file please. initial
>>> guess is that pinmux might be bad.
>> CONFIG_TARGET_SUBTARGET="mt7621"
>> CONFIG_TARGET_PROFILE="DEVICE_mt7621"
>>
>>
>> just a thought how do we pass detection with wrong pinmux setting.
>> badblocks is found it's when the first page read with ecc it fails.
>>
>> also this code is in the driver, so whatever pins is in the DTS this
>> code sets back to nand function.
>>
>>      data = DRV_Reg32(RALINK_SYSCTL_BASE+0x60);
>>      data &= ~((0x3<<18)|(0x3<<16));
>>      data |= ((0x2<<18) |(0x2<<16));
>>      DRV_WriteReg32(RALINK_SYSCTL_BASE+0x60, data);
>>
>> DTS is from target/linux/ramips/dts/mt7621.dtsi with one change.
>>
>> ----------
>> diff --git a/target/linux/ramips/dts/mt7621.dtsi
>> b/target/linux/ramips/dts/mt7621.dtsi
>> index a8b98ed..1b2c22c 100644
>> --- a/target/linux/ramips/dts/mt7621.dtsi
>> +++ b/target/linux/ramips/dts/mt7621.dtsi
>> @@ -360,7 +360,7 @@
>>          };
>>
>>          nand: nand at 1e003000 {
>> -               status = "disabled";
>> +
>>
>>                  compatible = "mtk,mt7621-nand";
>>                  bank-width = <2>;
>> ----------
>>
> sdhci and nand share the same pins. target/linux/ramips/dts/MT7621.dts
> enables gpio mode for the sdhci pins. also make sure that the sdhci
> driver is not loaded.
the sdhci driver is not even built. Did this to avoid setting to gpio. 
still same error . Can it be some clock issue do the ecc hardware have  
separate internal clock in the chip ? its two blocks but clk and reset 
looks to be the same bit for both.

------
diff --git a/target/linux/ramips/dts/MT7621.dts 
b/target/linux/ramips/dts/MT7621.dts
index 4013f3c..b5d5946 100644
--- a/target/linux/ramips/dts/MT7621.dts
+++ b/target/linux/ramips/dts/MT7621.dts
@@ -39,7 +39,7 @@
  };

  &sdhci {
-       status = "okay";
+       status = "disable";
  };

  &xhci {
@@ -49,7 +49,7 @@
  &pinctrl {
         state_default: pinctrl0 {
                 gpio {
-                       ralink,group = "i2c", "uart2", "uart3", 
"rgmii2", "sdhci";
+                       ralink,group = "i2c", "uart2", "uart3", "rgmii2";
                         ralink,function = "gpio";
                 };
         };

------

> 	John
>
>
>
>>
>>>      John
>>>
>>>> [    4.150000] MediaTek Nand driver init, version v2.1 Fix AHB virt2phys
>>>> error
>>>> [    4.170000] Allocate 16 byte aligned buffer: 806f3100
>>>> [    4.180000] Enable NFI Clock
>>>> [    4.180000] # MTK NAND # : Use HW ECC
>>>> [    4.190000] Device not found, ID: ecf1
>>>> [    4.200000] Not Support this Device!
>>>> [    4.200000] chip_mode=00000002
>>>> [    4.210000] Support this Device in MTK table! ecf1
>>>> [    4.220000] nand: device found, Manufacturer ID: 0xec, Chip ID: 0xf1
>>>> [    4.230000] nand: Samsung NAND 128MiB 3,3V 8-bit
>>>> [    4.240000] nand: 128 MiB, SLC, erase size: 128 KiB, page size: 2048,
>>>> OOB size: 64
>>>> [    4.260000] [NAND]select ecc bit:4, sparesize :64 spare_per_sector=16
>>>> [    4.270000] Scanning device for bad blocks
>>>> [    4.280000] Bad eraseblock 2 at 0x000000040000
>>>> [    4.290000] Bad eraseblock 3 at 0x000000060000
>>>> [    4.400000] Bad eraseblock 306 at 0x000002640000
>>>> [    4.440000] Bad eraseblock 386 at 0x000003040000
>>>> [    4.510000] Bad eraseblock 588 at 0x000004980000
>>>> [    4.670000] 4 ofpart partitions found on MTD device MT7621-NAND
>>>> [    4.680000] Creating 4 MTD partitions on "MT7621-NAND":
>>>> [    4.690000] 0x000000000000-0x000000080000 : "uboot"
>>>> [    4.700000] 0x000000080000-0x000000100000 : "uboot_env"
>>>> [    4.710000] 0x000000100000-0x000000140000 : "factory"
>>>> [    4.720000] 0x000000140000-0x000001000000 : "rootfs"
>>>> [    4.740000] mtd: device 3 (rootfs) set to be root filesystem
>>>> [    4.750000] mtdsplit: no squashfs found in "rootfs"
>>>> [    4.760000] [mtk_nand] probe successfully!
>>>>
>>>>
>>>> #cat /dev/mtd0 >/dev/null
>>>> [   75.910000] [mtk_nand_mcu_read_data] timeout
>>>> [   75.940000] [mtk_nand_mcu_read_data] timeout
>>>> [   75.980000] [mtk_nand_mcu_read_data] timeout
>>>> [   76.020000] [mtk_nand_mcu_read_data] timeout
>>>>
>>>>
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