ANDROID: mmc: Add sdio_readb_ext() function (56d01067) · Commits · e / devices / android_kernel_fairphone_FP3

drivers/mmc/core/sdio_io.c

+33 −0

Original line number	Diff line number	Diff line
		@@ -389,6 +389,39 @@ 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

+2 −0

Original line number	Diff line number	Diff line
		@@ -136,6 +136,8 @@ extern int sdio_release_irq(struct sdio_func *func);
		extern unsigned int sdio_align_size(struct sdio_func *func, unsigned int sz);

		extern u8 sdio_readb(struct sdio_func func, unsigned int addr, int err_ret);
		extern u8 sdio_readb_ext(struct sdio_func func, unsigned int addr, int err_ret,
		unsigned in);
		extern u16 sdio_readw(struct sdio_func func, unsigned int addr, int err_ret);
		extern u32 sdio_readl(struct sdio_func func, unsigned int addr, int err_ret);