[U-Boot] [PATCH 3/3 v8] mmc: add generic mmc spi driver

Mike Frysinger
2010-07-05T07:40:44Z

On Wednesday, May 19, 2010 00:37:47 Thomas Chou wrote:
> --- /dev/null
> +++ b/common/cmd_mmc_spi.c
> + printf("%s: %d at %u:%u %u %u\n", mmc->name, mmc->block_dev.dev,
> + bus, cs, speed, mode);

this is a bit terse. how about prefixing the hz output with like "hz:" and
the mode with like "mode:" ?

> +U_BOOT_CMD(
> + mmc_spi, 4, 0, do_mmc_spi,
> + "mmc_spi setup",
> + "[bus:]cs [hz] [mode] - setup mmc_spi device on given\n"
> + " SPI bus and chip select\n"
> +);

there should be no newline at the end of the help string

> --- /dev/null
> +++ b/drivers/mmc/mmc_spi.c
> +struct mmc *mmc_spi_init(uint bus, uint cs, uint speed, uint mode)
> +{
> + struct mmc *mmc;
> + mmc->b_max = MMC_SPI_MAX_BLOCKS;

do you have some local modification ? i dont see b_max anywhere in
include/mmc.h ...

unfortunately though, i tried this on my system and it doesnt seem to work.
using a simple SPI<->MMC card, the old mmc_spi driver works on my board, but
booting the new u-boot and running the same things shows:

bfin> mmc_spi 4 30000000 3
MMC_SPI: 0 at 0:4 30000000 3

bfin> mmc list
MMC_SPI: 0

bfin> mmcinfo
Card did not respond to voltage select!
Device: MMC_SPI
Manufacturer ID: 0
OEM: 0
Name: Tran Speed: 0
Rd Block Len: 0
MMC version 0.0
High Capacity: No
Capacity: 0
Bus Width: 1-bit

enabling debugging in the driver shows this:
bfin> mmcinfo
mmc_spi_init_p: clock 0
mmc_spi_set_ios: clock 0
mmc_spi_set_ios: clock 400000
mmc_spi_request:cmd0 0 0 0
mmc_spi_sendcmd:cmd0 resp6 1
mmc_spi_request:cmd8 15 1aa 0
mmc_spi_sendcmd:cmd8 resp8 ff
mmc_spi_request:cmd55 15 0 0
mmc_spi_sendcmd:cmd55 resp6 5
mmc_spi_request:cmd0 0 0 0
mmc_spi_sendcmd:cmd0 resp6 1
mmc_spi_request:cmd1 1 40300000 0
mmc_spi_sendcmd:cmd1 resp6 1
mmc_spi_request:cmd1 1 40300000 0
mmc_spi_sendcmd:cmd1 resp6 1
mmc_spi_request:cmd1 1 40300000 0
mmc_spi_sendcmd:cmd1 resp4 1
mmc_spi_request:cmd1 1 40300000 0
mmc_spi_sendcmd:cmd1 resp4 1
<these last 2 lines repeat for a while>
Card did not respond to voltage select!
...
-mike
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