diff options
| -rw-r--r-- | drivers/mmc/core/sdio_io.c | 93 | ||||
| -rw-r--r-- | drivers/mmc/core/sdio_ops.c | 19 | ||||
| -rw-r--r-- | drivers/mmc/core/sdio_ops.h | 2 |
3 files changed, 86 insertions, 28 deletions
diff --git a/drivers/mmc/core/sdio_io.c b/drivers/mmc/core/sdio_io.c index c2bad1195e3b..34b085d4024a 100644 --- a/drivers/mmc/core/sdio_io.c +++ b/drivers/mmc/core/sdio_io.c @@ -189,6 +189,67 @@ int sdio_set_block_size(struct sdio_func *func, unsigned blksz) EXPORT_SYMBOL_GPL(sdio_set_block_size); +/* Split an arbitrarily sized data transfer into several + * IO_RW_EXTENDED commands. */ +static int sdio_io_rw_ext_helper(struct sdio_func *func, int write, + unsigned addr, int incr_addr, u8 *buf, unsigned size) +{ + unsigned remainder = size; + unsigned max_blocks; + int ret; + + /* Do the bulk of the transfer using block mode (if supported). */ + if (func->card->cccr.multi_block) { + /* Blocks per command is limited by host count, host transfer + * size (we only use a single sg entry) and the maximum for + * IO_RW_EXTENDED of 511 blocks. */ + max_blocks = min(min( + func->card->host->max_blk_count, + func->card->host->max_seg_size / func->cur_blksize), + 511u); + + while (remainder > func->cur_blksize) { + unsigned blocks; + + blocks = remainder / func->cur_blksize; + if (blocks > max_blocks) + blocks = max_blocks; + size = blocks * func->cur_blksize; + + ret = mmc_io_rw_extended(func->card, write, + func->num, addr, incr_addr, buf, + blocks, func->cur_blksize); + if (ret) + return ret; + + remainder -= size; + buf += size; + if (incr_addr) + addr += size; + } + } + + /* Write the remainder using byte mode. */ + while (remainder > 0) { + size = remainder; + if (size > func->cur_blksize) + size = func->cur_blksize; + if (size > 512) + size = 512; /* maximum size for byte mode */ + + ret = mmc_io_rw_extended(func->card, write, func->num, addr, + incr_addr, buf, 1, size); + if (ret) + return ret; + + remainder -= size; + buf += size; + if (incr_addr) + addr += size; + } + return 0; +} + /** * sdio_readb - read a single byte from a SDIO function * @func: SDIO function to access @@ -252,15 +313,13 @@ EXPORT_SYMBOL_GPL(sdio_writeb); * @addr: address to begin reading from * @count: number of bytes to read * - * Reads up to 512 bytes from the address space of a given SDIO - * function. Return value indicates if the transfer succeeded or - * not. + * Reads from the address space of a given SDIO function. Return + * value indicates if the transfer succeeded or not. */ int sdio_memcpy_fromio(struct sdio_func *func, void *dst, unsigned int addr, int count) { - return mmc_io_rw_extended(func->card, 0, func->num, addr, 0, dst, - count); + return sdio_io_rw_ext_helper(func, 0, addr, 1, dst, count); } EXPORT_SYMBOL_GPL(sdio_memcpy_fromio); @@ -271,15 +330,13 @@ EXPORT_SYMBOL_GPL(sdio_memcpy_fromio); * @src: buffer that contains the data to write * @count: number of bytes to write * - * Writes up to 512 bytes to the address space of a given SDIO - * function. Return value indicates if the transfer succeeded or - * not. + * Writes to the address space of a given SDIO function. Return + * value indicates if the transfer succeeded or not. */ int sdio_memcpy_toio(struct sdio_func *func, unsigned int addr, void *src, int count) { - return mmc_io_rw_extended(func->card, 1, func->num, addr, 0, src, - count); + return sdio_io_rw_ext_helper(func, 1, addr, 1, src, count); } EXPORT_SYMBOL_GPL(sdio_memcpy_toio); @@ -290,15 +347,13 @@ EXPORT_SYMBOL_GPL(sdio_memcpy_toio); * @addr: address of (single byte) FIFO * @count: number of bytes to read * - * Reads up to 512 bytes from the specified FIFO of a given SDIO - * function. Return value indicates if the transfer succeeded or - * not. + * Reads from the specified FIFO of a given SDIO function. Return + * value indicates if the transfer succeeded or not. */ int sdio_readsb(struct sdio_func *func, void *dst, unsigned int addr, int count) { - return mmc_io_rw_extended(func->card, 0, func->num, addr, 1, dst, - count); + return sdio_io_rw_ext_helper(func, 0, addr, 0, dst, count); } EXPORT_SYMBOL_GPL(sdio_readsb); @@ -310,15 +365,13 @@ EXPORT_SYMBOL_GPL(sdio_readsb); * @src: buffer that contains the data to write * @count: number of bytes to write * - * Writes up to 512 bytes to the specified FIFO of a given SDIO - * function. Return value indicates if the transfer succeeded or - * not. + * Writes to the specified FIFO of a given SDIO function. Return + * value indicates if the transfer succeeded or not. */ int sdio_writesb(struct sdio_func *func, unsigned int addr, void *src, int count) { - return mmc_io_rw_extended(func->card, 1, func->num, addr, 1, src, - count); + return sdio_io_rw_ext_helper(func, 1, addr, 0, src, count); } EXPORT_SYMBOL_GPL(sdio_writesb); diff --git a/drivers/mmc/core/sdio_ops.c b/drivers/mmc/core/sdio_ops.c index 4f2c77139477..98e20532452a 100644 --- a/drivers/mmc/core/sdio_ops.c +++ b/drivers/mmc/core/sdio_ops.c @@ -88,7 +88,7 @@ int mmc_io_rw_direct(struct mmc_card *card, int write, unsigned fn, } int mmc_io_rw_extended(struct mmc_card *card, int write, unsigned fn, - unsigned addr, int bang, u8 *buf, unsigned size) + unsigned addr, int incr_addr, u8 *buf, unsigned blocks, unsigned blksz) { struct mmc_request mrq; struct mmc_command cmd; @@ -97,7 +97,9 @@ int mmc_io_rw_extended(struct mmc_card *card, int write, unsigned fn, BUG_ON(!card); BUG_ON(fn > 7); - BUG_ON(size > 512); + BUG_ON(blocks == 1 && blksz > 512); + WARN_ON(blocks == 0); + WARN_ON(blksz == 0); memset(&mrq, 0, sizeof(struct mmc_request)); memset(&cmd, 0, sizeof(struct mmc_command)); @@ -109,18 +111,21 @@ int mmc_io_rw_extended(struct mmc_card *card, int write, unsigned fn, cmd.opcode = SD_IO_RW_EXTENDED; cmd.arg = write ? 0x80000000 : 0x00000000; cmd.arg |= fn << 28; - cmd.arg |= bang ? 0x00000000 : 0x04000000; + cmd.arg |= incr_addr ? 0x04000000 : 0x00000000; cmd.arg |= addr << 9; - cmd.arg |= (size == 512) ? 0 : size; + if (blocks == 1 && blksz <= 512) + cmd.arg |= (blksz == 512) ? 0 : blksz; /* byte mode */ + else + cmd.arg |= 0x08000000 | blocks; /* block mode */ cmd.flags = MMC_RSP_R5 | MMC_CMD_ADTC; - data.blksz = size; - data.blocks = 1; + data.blksz = blksz; + data.blocks = blocks; data.flags = write ? MMC_DATA_WRITE : MMC_DATA_READ; data.sg = &sg; data.sg_len = 1; - sg_init_one(&sg, buf, size); + sg_init_one(&sg, buf, blksz * blocks); mmc_set_data_timeout(&data, card); diff --git a/drivers/mmc/core/sdio_ops.h b/drivers/mmc/core/sdio_ops.h index 1d42e4f366aa..e2e74b0d17d8 100644 --- a/drivers/mmc/core/sdio_ops.h +++ b/drivers/mmc/core/sdio_ops.h @@ -16,7 +16,7 @@ int mmc_send_io_op_cond(struct mmc_host *host, u32 ocr, u32 *rocr); int mmc_io_rw_direct(struct mmc_card *card, int write, unsigned fn, unsigned addr, u8 in, u8* out); int mmc_io_rw_extended(struct mmc_card *card, int write, unsigned fn, - unsigned addr, int bang, u8 *data, unsigned size); + unsigned addr, int incr_addr, u8 *buf, unsigned blocks, unsigned blksz); #endif |