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Commit 9be62e0b authored by Evgeniy Polyakov's avatar Evgeniy Polyakov Committed by Linus Torvalds
Browse files

w1: add touch block command 



Writes and returns sampled data back to userspace.

Signed-off-by: default avatarEvgeniy Polyakov <zbr@ioremap.net>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent 610705e7

drivers/w1/w1.h

+1 −0
Original line number Diff line number Diff line
@@ -210,6 +210,7 @@ u8 w1_read_8(struct w1_master *); 
int w1_reset_bus(struct w1_master *);

u8 w1_calc_crc8(u8 *, int);

void w1_write_block(struct w1_master *, const u8 *, int);

void w1_touch_block(struct w1_master *, u8 *, int);

u8 w1_read_block(struct w1_master *, u8 *, int);

int w1_reset_select_slave(struct w1_slave *sl);

void w1_next_pullup(struct w1_master *, int);

drivers/w1/w1_io.c

+25 −1
Original line number Diff line number Diff line
@@ -238,7 +238,6 @@ EXPORT_SYMBOL_GPL(w1_read_8); 
 * @param dev     the master device

 * @param buf     pointer to the data to write

 * @param len     the number of bytes to write

 * @return        the byte read

 */

void w1_write_block(struct w1_master *dev, const u8 *buf, int len)

{
@@ -255,6 +254,31 @@ void w1_write_block(struct w1_master *dev, const u8 *buf, int len) 
}

EXPORT_SYMBOL_GPL(w1_write_block);



/**

 * Touches a series of bytes.

 *

 * @param dev     the master device

 * @param buf     pointer to the data to write

 * @param len     the number of bytes to write

 */

void w1_touch_block(struct w1_master *dev, u8 *buf, int len)

{

	int i, j;

	u8 tmp;



	for (i = 0; i < len; ++i) {

		tmp = 0;

		for (j = 0; j < 8; ++j) {

			if (j == 7)

				w1_pre_write(dev);

			tmp |= w1_touch_bit(dev, (buf[i] >> j) & 0x1) << j;

		}



		buf[i] = tmp;

	}

}

EXPORT_SYMBOL_GPL(w1_touch_block);



/**

 * Reads a series of bytes.

 *

drivers/w1/w1_netlink.c

+8 −3
Original line number Diff line number Diff line
@@ -108,6 +108,10 @@ static int w1_process_command_slave(struct w1_slave *sl, struct cn_msg *msg, 
		cmd->cmd, cmd->len);



	switch (cmd->cmd) {

		case W1_CMD_TOUCH:

			w1_touch_block(sl->master, cmd->data, cmd->len);

			w1_send_read_reply(sl, msg, hdr, cmd);

			break;

		case W1_CMD_READ:

			w1_read_block(sl->master, cmd->data, cmd->len);

			w1_send_read_reply(sl, msg, hdr, cmd);
@@ -208,9 +212,6 @@ static void w1_cn_callback(void *data) 
			break;

		}



		if (!mlen)

			goto out_cont;



		if (m->type == W1_MASTER_CMD) {

			dev = w1_search_master_id(m->id.mst.id);

		} else if (m->type == W1_SLAVE_CMD) {
@@ -227,6 +228,10 @@ static void w1_cn_callback(void *data) 
			goto out_cont;

		}



		err = 0;

		if (!mlen)

			goto out_cont;



		mutex_lock(&dev->mutex);



		if (sl && w1_reset_select_slave(sl)) {

drivers/w1/w1_netlink.h

+1 −0
Original line number Diff line number Diff line
@@ -56,6 +56,7 @@ struct w1_netlink_msg 
#define W1_CMD_WRITE		0x1

#define W1_CMD_SEARCH		0x2

#define W1_CMD_ALARM_SEARCH	0x3

#define W1_CMD_TOUCH		0x4



struct w1_netlink_cmd

{