mmc/core/sdio_io.c

22  *	@func: SDIO function that will be accessed
27 void sdio_claim_host(struct sdio_func *func)
29 	if (WARN_ON(!func))
32 	mmc_claim_host(func->card->host);
38  *	@func: SDIO function that was accessed
43 void sdio_release_host(struct sdio_func *func)
45 	if (WARN_ON(!func))
48 	mmc_release_host(func->card->host);
54  *	@func: SDIO function to enable
59 int sdio_enable_func(struct sdio_func *func)
65 	if (!func)
68 	pr_debug("SDIO: Enabling device %s...\n", sdio_func_id(func));
70 	ret = mmc_io_rw_direct(func->card, 0, 0, SDIO_CCCR_IOEx, 0, &reg);
74 	reg |= 1 << func->num;
76 	ret = mmc_io_rw_direct(func->card, 1, 0, SDIO_CCCR_IOEx, reg, NULL);
80 	timeout = jiffies + msecs_to_jiffies(func->enable_timeout);
83 		ret = mmc_io_rw_direct(func->card, 0, 0, SDIO_CCCR_IORx, 0, &reg);
86 		if (reg & (1 << func->num))
93 	pr_debug("SDIO: Enabled device %s\n", sdio_func_id(func));
98 	pr_debug("SDIO: Failed to enable device %s\n", sdio_func_id(func));
105  *	@func: SDIO function to disable
110 int sdio_disable_func(struct sdio_func *func)
115 	if (!func)
118 	pr_debug("SDIO: Disabling device %s...\n", sdio_func_id(func));
120 	ret = mmc_io_rw_direct(func->card, 0, 0, SDIO_CCCR_IOEx, 0, &reg);
124 	reg &= ~(1 << func->num);
126 	ret = mmc_io_rw_direct(func->card, 1, 0, SDIO_CCCR_IOEx, reg, NULL);
130 	pr_debug("SDIO: Disabled device %s\n", sdio_func_id(func));
135 	pr_debug("SDIO: Failed to disable device %s\n", sdio_func_id(func));
142  *	@func: SDIO function to change
159 int sdio_set_block_size(struct sdio_func *func, unsigned blksz)
163 	if (blksz > func->card->host->max_blk_size)
167 		blksz = min(func->max_blksize, func->card->host->max_blk_size);
171 	ret = mmc_io_rw_direct(func->card, 1, 0,
172 		SDIO_FBR_BASE(func->num) + SDIO_FBR_BLKSIZE,
176 	ret = mmc_io_rw_direct(func->card, 1, 0,
177 		SDIO_FBR_BASE(func->num) + SDIO_FBR_BLKSIZE + 1,
181 	func->cur_blksize = blksz;
189 static inline unsigned int sdio_max_byte_size(struct sdio_func *func)
191 	unsigned mval =	func->card->host->max_blk_size;
193 	if (mmc_blksz_for_byte_mode(func->card))
194 		mval = min(mval, func->cur_blksize);
196 		mval = min(mval, func->max_blksize);
198 	if (mmc_card_broken_byte_mode_512(func->card))
206  * to take into account the properties of the host, as to enable the SDIO func
221  *	@func: SDIO function
233 unsigned int sdio_align_size(struct sdio_func *func, unsigned int sz)
252 	if (sz <= sdio_max_byte_size(func))
255 	if (func->card->cccr.multi_block) {
259 		if ((sz % func->cur_blksize) == 0)
266 		blk_sz = ((sz + func->cur_blksize - 1) /
267 			func->cur_blksize) * func->cur_blksize;
274 		if ((blk_sz % func->cur_blksize) == 0)
281 		byte_sz = _sdio_align_size(sz % func->cur_blksize);
282 		if (byte_sz <= sdio_max_byte_size(func)) {
283 			blk_sz = sz / func->cur_blksize;
284 			return blk_sz * func->cur_blksize + byte_sz;
291 		chunk_sz = _sdio_align_size(sdio_max_byte_size(func));
292 		if (chunk_sz == sdio_max_byte_size(func)) {
315 static int sdio_io_rw_ext_helper(struct sdio_func *func, int write,
322 	if (!func || (func->num > 7))
326 	if (func->card->cccr.multi_block && (size > sdio_max_byte_size(func))) {
329 		max_blocks = min(func->card->host->max_blk_count, 511u);
331 		while (remainder >= func->cur_blksize) {
334 			blocks = remainder / func->cur_blksize;
337 			size = blocks * func->cur_blksize;
339 			ret = mmc_io_rw_extended(func->card, write,
340 				func->num, addr, incr_addr, buf,
341 				blocks, func->cur_blksize);
354 		size = min(remainder, sdio_max_byte_size(func));
357 		ret = mmc_io_rw_extended(func->card, write, func->num, addr,
372  *	@func: SDIO function to access
380 u8 sdio_readb(struct sdio_func *func, unsigned int addr, int *err_ret)
385 	if (!func) {
391 	ret = mmc_io_rw_direct(func->card, 0, func->num, addr, 0, &val);
403  *	@func: SDIO function to access
412 void sdio_writeb(struct sdio_func *func, u8 b, unsigned int addr, int *err_ret)
416 	if (!func) {
422 	ret = mmc_io_rw_direct(func->card, 1, func->num, addr, b, NULL);
430  *	@func: SDIO function to access
441 u8 sdio_writeb_readb(struct sdio_func *func, u8 write_byte,
447 	ret = mmc_io_rw_direct(func->card, 1, func->num, addr,
460  *	@func: SDIO function to access
468 int sdio_memcpy_fromio(struct sdio_func *func, void *dst,
471 	return sdio_io_rw_ext_helper(func, 0, addr, 1, dst, count);
477  *	@func: SDIO function to access
485 int sdio_memcpy_toio(struct sdio_func *func, unsigned int addr,
488 	return sdio_io_rw_ext_helper(func, 1, addr, 1, src, count);
494  *	@func: SDIO function to access
502 int sdio_readsb(struct sdio_func *func, void *dst, unsigned int addr,
505 	return sdio_io_rw_ext_helper(func, 0, addr, 0, dst, count);
511  *	@func: SDIO function to access
519 int sdio_writesb(struct sdio_func *func, unsigned int addr, void *src,
522 	return sdio_io_rw_ext_helper(func, 1, addr, 0, src, count);
528  *	@func: SDIO function to access
536 u16 sdio_readw(struct sdio_func *func, unsigned int addr, int *err_ret)
540 	ret = sdio_memcpy_fromio(func, func->tmpbuf, addr, 2);
546 	return le16_to_cpup((__le16 *)func->tmpbuf);
552  *	@func: SDIO function to access
561 void sdio_writew(struct sdio_func *func, u16 b, unsigned int addr, int *err_ret)
565 	*(__le16 *)func->tmpbuf = cpu_to_le16(b);
567 	ret = sdio_memcpy_toio(func, addr, func->tmpbuf, 2);
575  *	@func: SDIO function to access
584 u32 sdio_readl(struct sdio_func *func, unsigned int addr, int *err_ret)
588 	ret = sdio_memcpy_fromio(func, func->tmpbuf, addr, 4);
594 	return le32_to_cpup((__le32 *)func->tmpbuf);
600  *	@func: SDIO function to access
609 void sdio_writel(struct sdio_func *func, u32 b, unsigned int addr, int *err_ret)
613 	*(__le32 *)func->tmpbuf = cpu_to_le32(b);
615 	ret = sdio_memcpy_toio(func, addr, func->tmpbuf, 4);
623  *	@func: an SDIO function of the card
631 unsigned char sdio_f0_readb(struct sdio_func *func, unsigned int addr,
637 	if (!func) {
643 	ret = mmc_io_rw_direct(func->card, 0, 0, addr, 0, &val);
655  *	@func: an SDIO function of the card
667 void sdio_f0_writeb(struct sdio_func *func, unsigned char b, unsigned int addr,
672 	if (!func) {
678 	if ((addr < 0xF0 || addr > 0xFF) && (!mmc_card_lenient_fn0(func->card))) {
684 	ret = mmc_io_rw_direct(func->card, 1, 0, addr, b, NULL);
692  *	@func: SDIO function attached to host
700 mmc_pm_flag_t sdio_get_host_pm_caps(struct sdio_func *func)
702 	if (!func)
705 	return func->card->host->pm_caps;
711  *	@func: SDIO function attached to host
722 int sdio_set_host_pm_flags(struct sdio_func *func, mmc_pm_flag_t flags)
726 	if (!func)
729 	host = func->card->host;
742  *	@func: SDIO function attached to host
759 void sdio_retune_crc_disable(struct sdio_func *func)
761 	func->card->host->retune_crc_disable = true;
767  *	@func: SDIO function attached to host
771 void sdio_retune_crc_enable(struct sdio_func *func)
773 	func->card->host->retune_crc_disable = false;
779  *	@func: SDIO function attached to host
794 void sdio_retune_hold_now(struct sdio_func *func)
796 	mmc_retune_hold_now(func->card->host);
802  *	@func: SDIO function attached to host
810 void sdio_retune_release(struct sdio_func *func)
812 	mmc_retune_release(func->card->host);