Re: [PATCH v2 1/3] radio-si470x: move some file operations to common file
Hi,
good patch. This saves quite some code in the I2C part of the driver...
Acked-by: Tobias Lorenz
Bye,
Toby
Am Donnerstag 03 Dezember 2009 13:57:22 schrieb Joonyoung Shim:
> The read and poll file operations of the si470x usb driver can be used
> also equally on the si470x i2c driver, so they go to the common file.
>
> Signed-off-by: Joonyoung Shim
> ---
> drivers/media/radio/si470x/radio-si470x-common.c | 98
> ++
> drivers/media/radio/si470x/radio-si470x-i2c.c| 15 +---
> drivers/media/radio/si470x/radio-si470x-usb.c| 97
> +-
> drivers/media/radio/si470x/radio-si470x.h|3 +-
> 4 files changed, 104 insertions(+), 109 deletions(-)
>
> diff --git a/drivers/media/radio/si470x/radio-si470x-common.c
> b/drivers/media/radio/si470x/radio-si470x-common.c
> index 7296cf4..f4645d4 100644
> --- a/drivers/media/radio/si470x/radio-si470x-common.c
> +++ b/drivers/media/radio/si470x/radio-si470x-common.c
> @@ -426,6 +426,104 @@ int si470x_rds_on(struct si470x_device *radio)
>
>
> /**
> + * File Operations Interface
> + **/
> +
> +/*
> + * si470x_fops_read - read RDS data
> + */
> +static ssize_t si470x_fops_read(struct file *file, char __user *buf,
> + size_t count, loff_t *ppos)
> +{
> + struct si470x_device *radio = video_drvdata(file);
> + int retval = 0;
> + unsigned int block_count = 0;
> +
> + /* switch on rds reception */
> + if ((radio->registers[SYSCONFIG1] & SYSCONFIG1_RDS) == 0)
> + si470x_rds_on(radio);
> +
> + /* block if no new data available */
> + while (radio->wr_index == radio->rd_index) {
> + if (file->f_flags & O_NONBLOCK) {
> + retval = -EWOULDBLOCK;
> + goto done;
> + }
> + if (wait_event_interruptible(radio->read_queue,
> + radio->wr_index != radio->rd_index) < 0) {
> + retval = -EINTR;
> + goto done;
> + }
> + }
> +
> + /* calculate block count from byte count */
> + count /= 3;
> +
> + /* copy RDS block out of internal buffer and to user buffer */
> + mutex_lock(&radio->lock);
> + while (block_count < count) {
> + if (radio->rd_index == radio->wr_index)
> + break;
> +
> + /* always transfer rds complete blocks */
> + if (copy_to_user(buf, &radio->buffer[radio->rd_index], 3))
> + /* retval = -EFAULT; */
> + break;
> +
> + /* increment and wrap read pointer */
> + radio->rd_index += 3;
> + if (radio->rd_index >= radio->buf_size)
> + radio->rd_index = 0;
> +
> + /* increment counters */
> + block_count++;
> + buf += 3;
> + retval += 3;
> + }
> + mutex_unlock(&radio->lock);
> +
> +done:
> + return retval;
> +}
> +
> +
> +/*
> + * si470x_fops_poll - poll RDS data
> + */
> +static unsigned int si470x_fops_poll(struct file *file,
> + struct poll_table_struct *pts)
> +{
> + struct si470x_device *radio = video_drvdata(file);
> + int retval = 0;
> +
> + /* switch on rds reception */
> + if ((radio->registers[SYSCONFIG1] & SYSCONFIG1_RDS) == 0)
> + si470x_rds_on(radio);
> +
> + poll_wait(file, &radio->read_queue, pts);
> +
> + if (radio->rd_index != radio->wr_index)
> + retval = POLLIN | POLLRDNORM;
> +
> + return retval;
> +}
> +
> +
> +/*
> + * si470x_fops - file operations interface
> + */
> +static const struct v4l2_file_operations si470x_fops = {
> + .owner = THIS_MODULE,
> + .read = si470x_fops_read,
> + .poll = si470x_fops_poll,
> + .ioctl = video_ioctl2,
> + .open = si470x_fops_open,
> + .release= si470x_fops_release,
> +};
> +
> +
> +
> +/**
> * Video4Linux Interface
> **/
>
> diff --git a/drivers/media/radio/si470x/radio-si470x-i2c.c
> b/drivers/media/radio/si470x/radio-si470x-i2c.c
> index 2d53b6a..4816a6d 100644
> --- a/drivers/media/radio/si470x/radio-si470x-i2c.c
> +++ b/drivers/media/radio/si470x/radio-si470x-i2c.c
> @@ -173,7 +173,7 @@ int si470x_disconnect_check(struct si470x_device *radio)
> /*
> * si470x_fops_open - file open
> */
> -static int si470x_fops_open(struct file *file)
> +int si470x_fops_open(struct file *file)
> {
> struct si470x_device *radio = video_drvdata(file);
> int retval = 0;
> @@ -194,7 +194,7 @@ static int si470x_fops_open(struct file *file)
> /*
> * si470
[PATCH v2 1/3] radio-si470x: move some file operations to common file
The read and poll file operations of the si470x usb driver can be used
also equally on the si470x i2c driver, so they go to the common file.
Signed-off-by: Joonyoung Shim
---
drivers/media/radio/si470x/radio-si470x-common.c | 98 ++
drivers/media/radio/si470x/radio-si470x-i2c.c| 15 +---
drivers/media/radio/si470x/radio-si470x-usb.c| 97 +-
drivers/media/radio/si470x/radio-si470x.h|3 +-
4 files changed, 104 insertions(+), 109 deletions(-)
diff --git a/drivers/media/radio/si470x/radio-si470x-common.c
b/drivers/media/radio/si470x/radio-si470x-common.c
index 7296cf4..f4645d4 100644
--- a/drivers/media/radio/si470x/radio-si470x-common.c
+++ b/drivers/media/radio/si470x/radio-si470x-common.c
@@ -426,6 +426,104 @@ int si470x_rds_on(struct si470x_device *radio)
/**
+ * File Operations Interface
+ **/
+
+/*
+ * si470x_fops_read - read RDS data
+ */
+static ssize_t si470x_fops_read(struct file *file, char __user *buf,
+ size_t count, loff_t *ppos)
+{
+ struct si470x_device *radio = video_drvdata(file);
+ int retval = 0;
+ unsigned int block_count = 0;
+
+ /* switch on rds reception */
+ if ((radio->registers[SYSCONFIG1] & SYSCONFIG1_RDS) == 0)
+ si470x_rds_on(radio);
+
+ /* block if no new data available */
+ while (radio->wr_index == radio->rd_index) {
+ if (file->f_flags & O_NONBLOCK) {
+ retval = -EWOULDBLOCK;
+ goto done;
+ }
+ if (wait_event_interruptible(radio->read_queue,
+ radio->wr_index != radio->rd_index) < 0) {
+ retval = -EINTR;
+ goto done;
+ }
+ }
+
+ /* calculate block count from byte count */
+ count /= 3;
+
+ /* copy RDS block out of internal buffer and to user buffer */
+ mutex_lock(&radio->lock);
+ while (block_count < count) {
+ if (radio->rd_index == radio->wr_index)
+ break;
+
+ /* always transfer rds complete blocks */
+ if (copy_to_user(buf, &radio->buffer[radio->rd_index], 3))
+ /* retval = -EFAULT; */
+ break;
+
+ /* increment and wrap read pointer */
+ radio->rd_index += 3;
+ if (radio->rd_index >= radio->buf_size)
+ radio->rd_index = 0;
+
+ /* increment counters */
+ block_count++;
+ buf += 3;
+ retval += 3;
+ }
+ mutex_unlock(&radio->lock);
+
+done:
+ return retval;
+}
+
+
+/*
+ * si470x_fops_poll - poll RDS data
+ */
+static unsigned int si470x_fops_poll(struct file *file,
+ struct poll_table_struct *pts)
+{
+ struct si470x_device *radio = video_drvdata(file);
+ int retval = 0;
+
+ /* switch on rds reception */
+ if ((radio->registers[SYSCONFIG1] & SYSCONFIG1_RDS) == 0)
+ si470x_rds_on(radio);
+
+ poll_wait(file, &radio->read_queue, pts);
+
+ if (radio->rd_index != radio->wr_index)
+ retval = POLLIN | POLLRDNORM;
+
+ return retval;
+}
+
+
+/*
+ * si470x_fops - file operations interface
+ */
+static const struct v4l2_file_operations si470x_fops = {
+ .owner = THIS_MODULE,
+ .read = si470x_fops_read,
+ .poll = si470x_fops_poll,
+ .ioctl = video_ioctl2,
+ .open = si470x_fops_open,
+ .release= si470x_fops_release,
+};
+
+
+
+/**
* Video4Linux Interface
**/
diff --git a/drivers/media/radio/si470x/radio-si470x-i2c.c
b/drivers/media/radio/si470x/radio-si470x-i2c.c
index 2d53b6a..4816a6d 100644
--- a/drivers/media/radio/si470x/radio-si470x-i2c.c
+++ b/drivers/media/radio/si470x/radio-si470x-i2c.c
@@ -173,7 +173,7 @@ int si470x_disconnect_check(struct si470x_device *radio)
/*
* si470x_fops_open - file open
*/
-static int si470x_fops_open(struct file *file)
+int si470x_fops_open(struct file *file)
{
struct si470x_device *radio = video_drvdata(file);
int retval = 0;
@@ -194,7 +194,7 @@ static int si470x_fops_open(struct file *file)
/*
* si470x_fops_release - file release
*/
-static int si470x_fops_release(struct file *file)
+int si470x_fops_release(struct file *file)
{
struct si470x_device *radio = video_drvdata(file);
int retval = 0;
@@ -215,17 +215,6 @@ static int si470x_fops_release(struct file *file)
}
-/*
- * si470x_fops - file operations interface
-
