mirror of https://gitee.com/openkylin/linux.git
V4L/DVB: tm6000: add send and recv function
Split the i2c send and receive functions on separate functions [mchehab@redhat.com: CodingStyle and fix the logic for more than 2 read values] Signed-off-by: Stefan Ringel <stefan.ringel@arcor.de> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
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@ -44,6 +44,36 @@ MODULE_PARM_DESC(i2c_debug, "enable debug messages [i2c]");
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printk(KERN_DEBUG "%s at %s: " fmt, \
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dev->name, __FUNCTION__ , ##args); } while (0)
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static int tm6000_i2c_send_regs(struct tm6000_core *dev, unsigned char addr,
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__u8 reg, char *buf, int len)
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{
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return tm6000_read_write_usb(dev, USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
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REQ_16_SET_GET_I2C_WR1_RDN, addr | reg << 8, 0, buf, len);
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}
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/* Generic read - doesn't work fine with 16bit registers */
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static int tm6000_i2c_recv_regs(struct tm6000_core *dev, unsigned char addr,
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__u8 reg, char *buf, int len)
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{
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int rc;
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rc = tm6000_read_write_usb(dev, USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
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REQ_16_SET_GET_I2C_WR1_RDN, addr | reg << 8, 0, buf, len);
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return rc;
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}
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/*
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* read from a 16bit register
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* for example xc2028, xc3028 or xc3028L
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*/
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static int tm6000_i2c_recv_regs16(struct tm6000_core *dev, unsigned char addr,
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__u16 reg, char *buf, int len)
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{
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return tm6000_read_write_usb(dev, USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
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REQ_14_SET_GET_I2C_WR2_RDN, addr, reg, buf, len);
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}
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static int tm6000_i2c_xfer(struct i2c_adapter *i2c_adap,
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struct i2c_msg msgs[], int num)
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{
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@ -78,13 +108,16 @@ static int tm6000_i2c_xfer(struct i2c_adapter *i2c_adap,
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i2c_dprintk(2, "; joined to read %s len=%d:",
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i == num - 2 ? "stop" : "nonstop",
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msgs[i + 1].len);
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rc = tm6000_read_write_usb (dev,
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USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
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msgs[i].len == 1 ? REQ_16_SET_GET_I2C_WR1_RDN
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: REQ_14_SET_GET_I2C_WR2_RDN,
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addr | msgs[i].buf[0] << 8,
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msgs[i].len == 1 ? 0 : msgs[i].buf[1],
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msgs[i + 1].buf, msgs[i + 1].len);
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if (msgs[i].len == 2) {
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rc = tm6000_i2c_recv_regs16(dev, addr,
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msgs[i].buf[0] << 8 | msgs[i].buf[1],
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msgs[i + 1].buf, msgs[i + 1].len);
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} else {
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rc = tm6000_i2c_recv_regs(dev, addr, msgs[i].buf[0],
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msgs[i + 1].buf, msgs[i + 1].len);
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}
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i++;
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if (addr == dev->tuner_addr << 1) {
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@ -99,10 +132,7 @@ static int tm6000_i2c_xfer(struct i2c_adapter *i2c_adap,
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if (i2c_debug >= 2)
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for (byte = 0; byte < msgs[i].len; byte++)
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printk(" %02x", msgs[i].buf[byte]);
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rc = tm6000_read_write_usb(dev,
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USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
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REQ_16_SET_GET_I2C_WR1_RDN,
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addr | msgs[i].buf[0] << 8, 0,
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rc = tm6000_i2c_send_regs(dev, addr, msgs[i].buf[0],
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msgs[i].buf + 1, msgs[i].len - 1);
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if (addr == dev->tuner_addr << 1) {
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@ -134,9 +164,7 @@ static int tm6000_i2c_eeprom(struct tm6000_core *dev,
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bytes[16] = '\0';
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for (i = 0; i < len; ) {
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*p = i;
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rc = tm6000_read_write_usb (dev,
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USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
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REQ_16_SET_GET_I2C_WR1_RDN, 0xa0 | i<<8, 0, p, 1);
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rc = tm6000_i2c_recv_regs(dev, 0xa0, i, p, 1);
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if (rc < 1) {
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if (p == eedata)
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goto noeeprom;
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