}
EXPORT_SYMBOL_GPL(sdio_disable_func);
+/**
+ * sdio_set_block_size - set the block size of an SDIO function
+ * @func: SDIO function to change
+ * @blksz: new block size or 0 to use the default.
+ *
+ * The default block size is the largest supported by both the function
+ * and the host, with a maximum of 512 to ensure that arbitrarily sized
+ * data transfer use the optimal (least) number of commands.
+ *
+ * A driver may call this to override the default block size set by the
+ * core. This can be used to set a block size greater than the maximum
+ * that reported by the card; it is the driver's responsibility to ensure
+ * it uses a value that the card supports.
+ *
+ * Returns 0 on success, -EINVAL if the host does not support the
+ * requested block size, or -EIO (etc.) if one of the resultant FBR block
+ * size register writes failed.
+ *
+ */
+int sdio_set_block_size(struct sdio_func *func, unsigned blksz)
+{
+ int ret;
+
+ if (blksz > func->card->host->max_blk_size)
+ return -EINVAL;
+
+ if (blksz == 0) {
+ blksz = min(min(
+ func->max_blksize,
+ func->card->host->max_blk_size),
+ 512u);
+ }
+
+ ret = mmc_io_rw_direct(func->card, 1, 0,
+ SDIO_FBR_BASE(func->num) + SDIO_FBR_BLKSIZE,
+ blksz & 0xff, NULL);
+ if (ret)
+ return ret;
+ ret = mmc_io_rw_direct(func->card, 1, 0,
+ SDIO_FBR_BASE(func->num) + SDIO_FBR_BLKSIZE + 1,
+ (blksz >> 8) & 0xff, NULL);
+ if (ret)
+ return ret;
+ func->cur_blksize = blksz;
+ return 0;
+}
+
+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
}
EXPORT_SYMBOL_GPL(sdio_writeb);
+/**
+ * sdio_memcpy_fromio - read a chunk of memory from a SDIO function
+ * @func: SDIO function to access
+ * @dst: buffer to store the data
+ * @addr: address to begin reading from
+ * @count: number of bytes to read
+ *
+ * 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 sdio_io_rw_ext_helper(func, 0, addr, 1, dst, count);
+}
+EXPORT_SYMBOL_GPL(sdio_memcpy_fromio);
+
+/**
+ * sdio_memcpy_toio - write a chunk of memory to a SDIO function
+ * @func: SDIO function to access
+ * @addr: address to start writing to
+ * @src: buffer that contains the data to write
+ * @count: number of bytes to write
+ *
+ * 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 sdio_io_rw_ext_helper(func, 1, addr, 1, src, count);
+}
+EXPORT_SYMBOL_GPL(sdio_memcpy_toio);
+
+/**
+ * sdio_readsb - read from a FIFO on a SDIO function
+ * @func: SDIO function to access
+ * @dst: buffer to store the data
+ * @addr: address of (single byte) FIFO
+ * @count: number of bytes to read
+ *
+ * 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 sdio_io_rw_ext_helper(func, 0, addr, 0, dst, count);
+}
+
+EXPORT_SYMBOL_GPL(sdio_readsb);
+
+/**
+ * sdio_writesb - write to a FIFO of a SDIO function
+ * @func: SDIO function to access
+ * @addr: address of (single byte) FIFO
+ * @src: buffer that contains the data to write
+ * @count: number of bytes to write
+ *
+ * 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 sdio_io_rw_ext_helper(func, 1, addr, 0, src, count);
+}
+EXPORT_SYMBOL_GPL(sdio_writesb);
+
+/**
+ * sdio_readw - read a 16 bit integer from a SDIO function
+ * @func: SDIO function to access
+ * @addr: address to read
+ * @err_ret: optional status value from transfer
+ *
+ * Reads a 16 bit integer from the address space of a given SDIO
+ * function. If there is a problem reading the address, 0xffff
+ * is returned and @err_ret will contain the error code.
+ */
+unsigned short sdio_readw(struct sdio_func *func, unsigned int addr,
+ int *err_ret)
+{
+ int ret;
+
+ if (err_ret)
+ *err_ret = 0;
+
+ ret = sdio_memcpy_fromio(func, func->tmpbuf, addr, 2);
+ if (ret) {
+ if (err_ret)
+ *err_ret = ret;
+ return 0xFFFF;
+ }
+
+ return le16_to_cpu(*(u16*)func->tmpbuf);
+}
+EXPORT_SYMBOL_GPL(sdio_readw);
+
+/**
+ * sdio_writew - write a 16 bit integer to a SDIO function
+ * @func: SDIO function to access
+ * @b: integer to write
+ * @addr: address to write to
+ * @err_ret: optional status value from transfer
+ *
+ * Writes a 16 bit integer to the address space of a given SDIO
+ * function. @err_ret will contain the status of the actual
+ * transfer.
+ */
+void sdio_writew(struct sdio_func *func, unsigned short b, unsigned int addr,
+ int *err_ret)
+{
+ int ret;
+
+ *(u16*)func->tmpbuf = cpu_to_le16(b);
+
+ ret = sdio_memcpy_toio(func, addr, func->tmpbuf, 2);
+ if (err_ret)
+ *err_ret = ret;
+}
+EXPORT_SYMBOL_GPL(sdio_writew);
+
+/**
+ * sdio_readl - read a 32 bit integer from a SDIO function
+ * @func: SDIO function to access
+ * @addr: address to read
+ * @err_ret: optional status value from transfer
+ *
+ * Reads a 32 bit integer from the address space of a given SDIO
+ * function. If there is a problem reading the address,
+ * 0xffffffff is returned and @err_ret will contain the error
+ * code.
+ */
+unsigned long sdio_readl(struct sdio_func *func, unsigned int addr,
+ int *err_ret)
+{
+ int ret;
+
+ if (err_ret)
+ *err_ret = 0;
+
+ ret = sdio_memcpy_fromio(func, func->tmpbuf, addr, 4);
+ if (ret) {
+ if (err_ret)
+ *err_ret = ret;
+ return 0xFFFFFFFF;
+ }
+
+ return le32_to_cpu(*(u32*)func->tmpbuf);
+}
+EXPORT_SYMBOL_GPL(sdio_readl);
+
+/**
+ * sdio_writel - write a 32 bit integer to a SDIO function
+ * @func: SDIO function to access
+ * @b: integer to write
+ * @addr: address to write to
+ * @err_ret: optional status value from transfer
+ *
+ * Writes a 32 bit integer to the address space of a given SDIO
+ * function. @err_ret will contain the status of the actual
+ * transfer.
+ */
+void sdio_writel(struct sdio_func *func, unsigned long b, unsigned int addr,
+ int *err_ret)
+{
+ int ret;
+
+ *(u32*)func->tmpbuf = cpu_to_le32(b);
+
+ ret = sdio_memcpy_toio(func, addr, func->tmpbuf, 4);
+ if (err_ret)
+ *err_ret = ret;
+}
+EXPORT_SYMBOL_GPL(sdio_writel);
+
+/**
+ * sdio_f0_readb - read a single byte from SDIO function 0
+ * @func: an SDIO function of the card
+ * @addr: address to read
+ * @err_ret: optional status value from transfer
+ *
+ * Reads a single byte from the address space of SDIO function 0.
+ * If there is a problem reading the address, 0xff is returned
+ * and @err_ret will contain the error code.
+ */
+unsigned char sdio_f0_readb(struct sdio_func *func, unsigned int addr,
+ int *err_ret)
+{
+ int ret;
+ unsigned char val;
+
+ BUG_ON(!func);
+
+ if (err_ret)
+ *err_ret = 0;
+
+ ret = mmc_io_rw_direct(func->card, 0, 0, addr, 0, &val);
+ if (ret) {
+ if (err_ret)
+ *err_ret = ret;
+ return 0xFF;
+ }
+
+ return val;
+}
+EXPORT_SYMBOL_GPL(sdio_f0_readb);
+
+/**
+ * sdio_f0_writeb - write a single byte to SDIO function 0
+ * @func: an SDIO function of the card
+ * @b: byte to write
+ * @addr: address to write to
+ * @err_ret: optional status value from transfer
+ *
+ * Writes a single byte to the address space of SDIO function 0.
+ * @err_ret will contain the status of the actual transfer.
+ *
+ * Only writes to the vendor specific CCCR registers (0xF0 -
+ * 0xFF) are permiited; @err_ret will be set to -EINVAL for *
+ * writes outside this range.
+ */
+void sdio_f0_writeb(struct sdio_func *func, unsigned char b, unsigned int addr,
+ int *err_ret)
+{
+ int ret;
+
+ BUG_ON(!func);
+
+ if (addr < 0xF0 || addr > 0xFF) {
+ if (err_ret)
+ *err_ret = -EINVAL;
+ return;
+ }
+
+ ret = mmc_io_rw_direct(func->card, 1, 0, addr, b, NULL);
+ if (err_ret)
+ *err_ret = ret;
+}
+EXPORT_SYMBOL_GPL(sdio_f0_writeb);
projects / linux-2.6 / blobdiff