V4L/DVB (5528): Usbvision: reverting some i2c cleanups
usbvision-i2c.c: reverting some i2c cleanups in order to recover a safe state. Acked-by: Dwaine Garden <DwaineGarden@rogers.com> Signed-off-by: Thierry MERLE <thierry.merle@free.fr> Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
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1 changed files with 40 additions and 23 deletions
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@ -60,7 +60,7 @@ static inline int try_write_address(struct i2c_adapter *i2c_adap,
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int i, ret = -1;
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char buf[4];
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usbvision = i2c_get_adapdata(i2c_adap);
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usbvision = (struct usb_usbvision *)i2c_get_adapdata(i2c_adap);
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buf[0] = 0x00;
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for (i = 0; i <= retries; i++) {
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ret = (usbvision_i2c_write(usbvision, addr, buf, 1));
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@ -85,7 +85,7 @@ static inline int try_read_address(struct i2c_adapter *i2c_adap,
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int i, ret = -1;
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char buf[4];
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usbvision = i2c_get_adapdata(i2c_adap);
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usbvision = (struct usb_usbvision *)i2c_get_adapdata(i2c_adap);
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for (i = 0; i <= retries; i++) {
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ret = (usbvision_i2c_read(usbvision, addr, buf, 1));
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if (ret == 1)
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@ -158,7 +158,8 @@ usbvision_i2c_xfer(struct i2c_adapter *i2c_adap, struct i2c_msg msgs[], int num)
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int i, ret;
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unsigned char addr;
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usbvision = i2c_get_adapdata(i2c_adap);
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usbvision = (struct usb_usbvision *)i2c_get_adapdata(i2c_adap);
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for (i = 0; i < num; i++) {
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pmsg = &msgs[i];
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ret = usb_find_address(i2c_adap, pmsg, i2c_adap->retries, &addr);
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@ -205,6 +206,28 @@ static struct i2c_algorithm usbvision_algo = {
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};
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/*
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* registering functions to load algorithms at runtime
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*/
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static int usbvision_i2c_usb_add_bus(struct i2c_adapter *adap)
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{
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PDEBUG(DBG_I2C, "I2C debugging is enabled [i2c]");
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PDEBUG(DBG_I2C, "ALGO debugging is enabled [i2c]");
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/* register new adapter to i2c module... */
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adap->algo = &usbvision_algo;
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adap->timeout = 100; /* default values, should */
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adap->retries = 3; /* be replaced by defines */
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i2c_add_adapter(adap);
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PDEBUG(DBG_I2C,"i2c bus for %s registered", adap->name);
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return 0;
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}
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/* ----------------------------------------------------------------------- */
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/* usbvision specific I2C functions */
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/* ----------------------------------------------------------------------- */
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@ -213,28 +236,23 @@ static struct i2c_client i2c_client_template;
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int usbvision_i2c_register(struct usb_usbvision *usbvision)
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{
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int ret;
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usbvision->i2c_adap = i2c_adap_template;
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usbvision->i2c_adap.dev.parent = &usbvision->dev->dev;
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PDEBUG(DBG_I2C, "I2C debugging is enabled [i2c]");
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memcpy(&usbvision->i2c_adap, &i2c_adap_template,
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sizeof(struct i2c_adapter));
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memcpy(&usbvision->i2c_client, &i2c_client_template,
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sizeof(struct i2c_client));
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sprintf(usbvision->i2c_adap.name + strlen(usbvision->i2c_adap.name),
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" #%d", usbvision->vdev->minor & 0x1f);
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PDEBUG(DBG_I2C,"I2C Registering adaptername: %s", usbvision->i2c_adap.name);
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i2c_set_adapdata(&usbvision->i2c_adap,usbvision);
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if ((ret = i2c_add_adapter(&usbvision->i2c_adap)) < 0) {
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PDEBUG(DBG_I2C,"could not add I2C adapter %s", usbvision->i2c_adap.name);
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return ret;
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}
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PDEBUG(DBG_I2C,"Adaptername: %s", usbvision->i2c_adap.name);
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usbvision->i2c_adap.dev.parent = &usbvision->dev->dev;
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i2c_set_adapdata(&usbvision->i2c_adap, usbvision);
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i2c_set_clientdata(&usbvision->i2c_client, usbvision);
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/* TODO: use i2c_client for eeprom detection as an example... */
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usbvision->i2c_client = i2c_client_template;
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usbvision->i2c_client.adapter = &usbvision->i2c_adap;
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if (usbvision_write_reg(usbvision, USBVISION_SER_MODE, USBVISION_IIC_LRNACK) < 0) {
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printk(KERN_ERR "usbvision_i2c_register: can't write reg\n");
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printk(KERN_ERR "usbvision_register: can't write reg\n");
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return -EBUSY;
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}
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@ -253,7 +271,7 @@ int usbvision_i2c_register(struct usb_usbvision *usbvision)
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}
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#endif
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return 0;
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return usbvision_i2c_usb_add_bus(&usbvision->i2c_adap);
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}
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int usbvision_i2c_unregister(struct usb_usbvision *usbvision)
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@ -276,7 +294,8 @@ static int attach_inform(struct i2c_client *client)
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{
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struct usb_usbvision *usbvision;
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usbvision = i2c_get_adapdata(client->adapter);
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usbvision = (struct usb_usbvision *)i2c_get_adapdata(client->adapter);
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switch (client->addr << 1) {
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case 0x42 << 1:
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case 0x43 << 1:
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@ -329,7 +348,7 @@ static int detach_inform(struct i2c_client *client)
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{
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struct usb_usbvision *usbvision;
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usbvision = i2c_get_adapdata(client->adapter);
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usbvision = (struct usb_usbvision *)i2c_get_adapdata(client->adapter);
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PDEBUG(DBG_I2C,"usbvision[%d] detaches %s", usbvision->nr, client->name);
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return 0;
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@ -508,8 +527,6 @@ static struct i2c_adapter i2c_adap_template = {
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.owner = THIS_MODULE,
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.name = "usbvision",
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.id = I2C_HW_B_BT848, /* FIXME */
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.algo = &usbvision_algo,
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.algo_data = NULL,
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.client_register = attach_inform,
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.client_unregister = detach_inform,
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#ifdef I2C_ADAP_CLASS_TV_ANALOG
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