diff options
author | Dmitry Shmidt <dimitrysh@google.com> | 2011-11-20 09:53:41 +0800 |
---|---|---|
committer | Andy Green <andy.green@linaro.org> | 2011-11-20 10:18:09 +0800 |
commit | 8b34474d71e6c3d3a57bd50452150746576b2d40 (patch) | |
tree | f2d59e7d962a4798333a167c3655d9aa0c040aee /drivers | |
parent | c121e7834403a1469398037d7388c02e7fd71d11 (diff) |
trout: Add functions for WiFi
Diffstat (limited to 'drivers')
-rwxr-xr-x[-rw-r--r--] | drivers/mmc/core/sdio_io.c | 33 |
1 files changed, 33 insertions, 0 deletions
diff --git a/drivers/mmc/core/sdio_io.c b/drivers/mmc/core/sdio_io.c index 0f687cdeb06..549a3414464 100644..100755 --- a/drivers/mmc/core/sdio_io.c +++ b/drivers/mmc/core/sdio_io.c @@ -383,6 +383,39 @@ u8 sdio_readb(struct sdio_func *func, unsigned int addr, int *err_ret) EXPORT_SYMBOL_GPL(sdio_readb); /** + * sdio_readb_ext - read a single byte from a SDIO function + * @func: SDIO function to access + * @addr: address to read + * @err_ret: optional status value from transfer + * @in: value to add to argument + * + * Reads a single byte from the address space of a given SDIO + * function. If there is a problem reading the address, 0xff + * is returned and @err_ret will contain the error code. + */ +unsigned char sdio_readb_ext(struct sdio_func *func, unsigned int addr, + int *err_ret, unsigned in) +{ + int ret; + unsigned char val; + + BUG_ON(!func); + + if (err_ret) + *err_ret = 0; + + ret = mmc_io_rw_direct(func->card, 0, func->num, addr, (u8)in, &val); + if (ret) { + if (err_ret) + *err_ret = ret; + return 0xFF; + } + + return val; +} +EXPORT_SYMBOL_GPL(sdio_readb_ext); + +/** * sdio_writeb - write a single byte to a SDIO function * @func: SDIO function to access * @b: byte to write |