From 15a0580ced081a0f7dc2deea8a4812bdc5e9a109 Mon Sep 17 00:00:00 2001 From: David Brownell Date: Wed, 8 Aug 2007 09:12:54 -0700 Subject: mmc_spi host driver This is the latest version of the MMC-over-SPI support. It works on 2.6.23-rc2 plus git-mmc (from rc1-mm2), along with the preceding patches which teach the rest of the MMC stack about SPI. The main issue of note is that sometimes cards need to be power cycled to recover after certain faults. Also, it may sometimes be necessary to disable CRCs. ("modprobe mmc_core use_spi_crc=n") Signed-off-by: David Brownell Cc: mikael.starvik@axis.com, Cc: Hans-Peter Nilsson Cc: Jan Nikitenko Cc: Mike Lavender Signed-off-by: Pierre Ossman --- include/linux/spi/mmc_spi.h | 33 +++++++++++++++++++++++++++++++++ 1 file changed, 33 insertions(+) create mode 100644 include/linux/spi/mmc_spi.h (limited to 'include/linux') diff --git a/include/linux/spi/mmc_spi.h b/include/linux/spi/mmc_spi.h new file mode 100644 index 00000000000..e9bbe3ebd72 --- /dev/null +++ b/include/linux/spi/mmc_spi.h @@ -0,0 +1,33 @@ +#ifndef __LINUX_SPI_MMC_SPI_H +#define __LINUX_SPI_MMC_SPI_H + +struct device; +struct mmc_host; + +/* Put this in platform_data of a device being used to manage an MMC/SD + * card slot. (Modeled after PXA mmc glue; see that for usage examples.) + * + * REVISIT This is not a spi-specific notion. Any card slot should be + * able to handle it. If the MMC core doesn't adopt this kind of notion, + * switch the "struct device *" parameters over to "struct spi_device *". + */ +struct mmc_spi_platform_data { + /* driver activation and (optional) card detect irq hookup */ + int (*init)(struct device *, + irqreturn_t (*)(int, void *), + void *); + void (*exit)(struct device *, void *); + + /* sense switch on sd cards */ + int (*get_ro)(struct device *); + + /* how long to debounce card detect, in msecs */ + u16 detect_delay; + + /* power management */ + u16 powerup_msecs; /* delay of up to 250 msec */ + u32 ocr_mask; /* available voltages */ + void (*setpower)(struct device *, unsigned int maskval); +}; + +#endif /* __LINUX_SPI_MMC_SPI_H */ -- cgit v1.2.3-70-g09d2