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| author | Evgeniy Polyakov <zbr@ioremap.net> | 2009-01-07 18:09:01 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2009-01-08 08:31:13 -0800 |
| commit | 9be62e0b2fadaf5ffeb32fd1b910ef1fe6bd43db (patch) | |
| tree | 86d39cd9790a83275380d5f37495d76888c3153b /drivers/w1 | |
| parent | 610705e780395ef30a1b8e53de150c37381ca31f (diff) | |
| download | linux-9be62e0b2fadaf5ffeb32fd1b910ef1fe6bd43db.tar.gz linux-9be62e0b2fadaf5ffeb32fd1b910ef1fe6bd43db.tar.bz2 linux-9be62e0b2fadaf5ffeb32fd1b910ef1fe6bd43db.zip | |
w1: add touch block command
Writes and returns sampled data back to userspace.
Signed-off-by: Evgeniy Polyakov <zbr@ioremap.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'drivers/w1')
| -rw-r--r-- | drivers/w1/w1.h | 1 | ||||
| -rw-r--r-- | drivers/w1/w1_io.c | 26 | ||||
| -rw-r--r-- | drivers/w1/w1_netlink.c | 11 | ||||
| -rw-r--r-- | drivers/w1/w1_netlink.h | 1 |
4 files changed, 35 insertions, 4 deletions
diff --git a/drivers/w1/w1.h b/drivers/w1/w1.h index 97304bd83ec9..d8a9709f3449 100644 --- a/drivers/w1/w1.h +++ b/drivers/w1/w1.h @@ -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); diff --git a/drivers/w1/w1_io.c b/drivers/w1/w1_io.c index 5139c25ca962..442bd8bbd4a5 100644 --- a/drivers/w1/w1_io.c +++ b/drivers/w1/w1_io.c @@ -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) { @@ -256,6 +255,31 @@ 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. * * @param dev the master device diff --git a/drivers/w1/w1_netlink.c b/drivers/w1/w1_netlink.c index 2e07b59b9859..cae556c8577b 100644 --- a/drivers/w1/w1_netlink.c +++ b/drivers/w1/w1_netlink.c @@ -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)) { diff --git a/drivers/w1/w1_netlink.h b/drivers/w1/w1_netlink.h index 21913dfc0f3a..99dd21ba14c6 100644 --- a/drivers/w1/w1_netlink.h +++ b/drivers/w1/w1_netlink.h @@ -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 { |