From: Stefan Ringel <stefan.rin...@arcor.de>
add separately send and receive function
Signed-off-by: Stefan Ringel <stefan.rin...@arcor.de>
---
drivers/staging/tm6000/tm6000-i2c.c | 51 +++++++++++++++++++++++++---------
1 files changed, 37 insertions(+), 14 deletions(-)
diff --git a/drivers/staging/tm6000/tm6000-i2c.c
b/drivers/staging/tm6000/tm6000-i2c.c
index 656cd19..2de92f3 100644
--- a/drivers/staging/tm6000/tm6000-i2c.c
+++ b/drivers/staging/tm6000/tm6000-i2c.c
@@ -44,6 +44,32 @@ MODULE_PARM_DESC(i2c_debug, "enable debug messages [i2c]");
printk(KERN_DEBUG "%s at %s: " fmt, \
dev->name, __FUNCTION__ , ##args); } while (0)
+int tm6000_i2c_send_regs(struct tm6000_core *dev, unsigned char addr, __u8
reg, char *buf, int len)
+{
+ return tm6000_read_write_usb(dev, USB_DIR_OUT | USB_TYPE_VENDOR |
USB_RECIP_DEVICE,
+ REQ_16_SET_GET_I2C_WR1_RDN, addr | reg << 8, 0, buf, len);
+}
+
+/* read from a 8bit register */
+int tm6000_i2c_recv_regs(struct tm6000_core *dev, unsigned char addr, __u8
reg, char *buf, int len)
+{
+ int rc;
+
+ rc = tm6000_read_write_usb(dev, USB_DIR_IN | USB_TYPE_VENDOR |
USB_RECIP_DEVICE,
+ REQ_16_SET_GET_I2C_WR1_RDN, addr | reg << 8, 0, buf,
len);
+
+ return rc;
+}
+
+/* read from a 16bit register
+ * for example xc2028, xc3028 or xc3028L
+ */
+int tm6000_i2c_recv_regs16(struct tm6000_core *dev, unsigned char addr, __u16
reg, char *buf, int len)
+{
+ return tm6000_read_write_usb(dev, USB_DIR_IN | USB_TYPE_VENDOR |
USB_RECIP_DEVICE,
+ REQ_14_SET_GET_I2C_WR2_RDN, addr, reg, buf, len);
+}
+
static int tm6000_i2c_xfer(struct i2c_adapter *i2c_adap,
struct i2c_msg msgs[], int num)
{
@@ -78,13 +104,15 @@ static int tm6000_i2c_xfer(struct i2c_adapter *i2c_adap,
i2c_dprintk(2, "; joined to read %s len=%d:",
i == num - 2 ? "stop" : "nonstop",
msgs[i + 1].len);
- rc = tm6000_read_write_usb (dev,
- USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
- msgs[i].len == 1 ? REQ_16_SET_GET_I2C_WR1_RDN
- : REQ_14_SET_GET_I2C_WR2_RDN,
- addr | msgs[i].buf[0] << 8,
- msgs[i].len == 1 ? 0 : msgs[i].buf[1],
- msgs[i + 1].buf, msgs[i + 1].len);
+
+ if (msgs[i].len == 1) {
+ rc = tm6000_i2c_recv_regs(dev, addr,
msgs[i].buf[0],
+ msgs[i + 1].buf, msgs[i + 1].len);
+ } else {
+ rc = tm6000_i2c_recv_regs16(dev, addr,
msgs[i].buf[0] << 8 | msgs[i].buf[1],
+ msgs[i + 1].buf, msgs[i + 1].len);
+ }
+
i++;
if (addr == dev->tuner_addr) {
@@ -99,10 +127,7 @@ static int tm6000_i2c_xfer(struct i2c_adapter *i2c_adap,
if (i2c_debug >= 2)
for (byte = 0; byte < msgs[i].len; byte++)
printk(" %02x", msgs[i].buf[byte]);
- rc = tm6000_read_write_usb(dev,
- USB_DIR_OUT | USB_TYPE_VENDOR |
USB_RECIP_DEVICE,
- REQ_16_SET_GET_I2C_WR1_RDN,
- addr | msgs[i].buf[0] << 8, 0,
+ rc = tm6000_i2c_send_regs(dev, addr, msgs[i].buf[0],
msgs[i].buf + 1, msgs[i].len - 1);
if (addr == dev->tuner_addr) {
@@ -134,9 +159,7 @@ static int tm6000_i2c_eeprom(struct tm6000_core *dev,
bytes[16] = '\0';
for (i = 0; i < len; ) {
*p = i;
- rc = tm6000_read_write_usb (dev,
- USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
- REQ_16_SET_GET_I2C_WR1_RDN, 0xa0 | i<<8, 0, p, 1);
+ rc = tm6000_i2c_recv_regs(dev, 0xa0, i, p, 1);
if (rc < 1) {
if (p == eedata)
goto noeeprom;
--
1.6.6.1
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