VoCore: SPI & MicroSD 11

Just waiting for factory…So I am on SPI again. :)

Last time I have done the driver, but it is not working with mmc. I think there must be something wrong with it, but after my test, the driver works quite well, so I guess I should make some mistake in mmc driver config.
NEW SOURCE CODE HERE: spi-rt2880.c

I soldered another flash to a bare VoCore board, so I do not have to solder the eight wires. Connect CS1->CS0, SPICLK->SPICLK, MOSI->MOSI, MISO->MISO, also pull HOLD/WP to high, so now VoCore SPI1 is controlling the second flash.
It works very well by current openwrt in high speed(>935KHz).

Add the following code to replace spidev@1 in VOCORE.dts, set the flash to 500KHz.

m25p80@1 {
    #address-cells = <1>;
    #size-cells = <1>;
    compatible = "w25q128";
    reg = <1>;
    linux,modalias = "m25p80", "w25q128";
    spi-max-frequency = <500000>;

    partition@0 {
        label = "xxxx";
        reg = <0x0 0x1000000>;
    };
};

Hardware part connection:
IMG_20140929_101537

IMG_20140929_101119

From my test, the data is normal.

root@OpenWrt:/sys/devices/10000000.palmbus/10000b00.spi/spi_master/spi32766/spi32766.1# ls
driver      factory_id  modalias    mtd         subsystem   uevent
root@OpenWrt:/sys/devices/10000000.palmbus/10000b00.spi/spi_master/spi32766/spi32766.1# cat factory_id
D26210-44DB40312F

Its log:

Mon Sep 29 02:06:27 2014 authpriv.notice dropbear[1175]: Password auth succeeded for 'root' from 192.168.61.159:58928
Mon Sep 29 02:07:19 2014 kern.warn kernel: [ 1461.940000] m25p80 spi32766.1: low speed mode.
Mon Sep 29 02:07:19 2014 kern.warn kernel: [ 1461.960000] m25p80 spi32766.1: delay = 1000
Mon Sep 29 02:07:19 2014 kern.warn kernel: [ 1461.970000] m25p80 spi32766.1: low speed mode.
Mon Sep 29 02:07:19 2014 kern.warn kernel: [ 1461.980000] m25p80 spi32766.1: delay = 1000
Mon Sep 29 02:07:19 2014 kern.warn kernel: [ 1461.980000] m25p80 spi32766.1: cs = 1, on
Mon Sep 29 02:07:19 2014 kern.warn kernel: [ 1462.000000] m25p80 spi32766.1: bit/x: 8,5
Mon Sep 29 02:07:19 2014 kern.warn kernel: [ 1462.000000] m25p80 spi32766.1: low speed mode.

Read data from the flash is also normal, just a little slow:

root@OpenWrt:/# hexdump -C /dev/mtdblock6 | head -10
00000000  27 05 19 56 d6 62 66 a6  53 88 7f 17 00 01 96 c0  |'..V.bf.S.......|
00000010  80 20 00 00 80 20 00 00  a3 c1 ed e5 05 05 01 00  |. ... ..........|
00000020  53 50 49 20 46 6c 61 73  68 20 49 6d 61 67 65 00  |SPI Flash Image.|
00000030  06 50 00 00 00 00 00 00  00 00 00 00 00 00 00 00  |.P..............|
00000040  ff 00 00 10 00 00 00 00  fd 00 00 10 00 00 00 00  |................|
00000050  e9 01 00 10 00 00 00 00  e7 01 00 10 00 00 00 00  |................|
00000060  e5 01 00 10 00 00 00 00  e3 01 00 10 00 00 00 00  |................|
00000070  e1 01 00 10 00 00 00 00  df 01 00 10 00 00 00 00  |................|
00000080  dd 01 00 10 00 00 00 00  db 01 00 10 00 00 00 00  |................|
00000090  d9 01 00 10 00 00 00 00  d7 01 00 10 00 00 00 00  |................|

I think last time I should did something wrong in the mmc driver config…