mirror of https://gitee.com/openkylin/linux.git
[media] az6007: Protect read/write calls with a mutex
This will avoid interference with CI and IR I/O operations. Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
This commit is contained in:
Mauro Carvalho Chehab
parent
04e3ece715
commit
a2c35d346d
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@ -53,17 +53,11 @@ DVB_DEFINE_MOD_OPT_ADAPTER_NR(adapter_nr);
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#define AZ6007_READ_IR 0xb4
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struct az6007_device_state {
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struct mutex mutex;
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struct dvb_ca_en50221 ca;
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struct mutex ca_mutex;
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unsigned warm : 1;
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/* Due to DRX-K - probably need changes */
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unsigned warm:1;
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int (*gate_ctrl) (struct dvb_frontend *, int);
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bool tuner_attached;
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unsigned char data[4096];
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struct usb_data_stream *stream;
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};
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static struct drxk_config terratec_h7_drxk = {
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@ -107,8 +101,7 @@ static struct mt2063_config az6007_mt2063_config = {
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.refclock = 36125000,
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};
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/* check for mutex FIXME */
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static int az6007_read(struct usb_device *udev, u8 req, u16 value,
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static int __az6007_read(struct usb_device *udev, u8 req, u16 value,
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u16 index, u8 *b, int blen)
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{
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int ret;
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@ -130,7 +123,23 @@ static int az6007_read(struct usb_device *udev, u8 req, u16 value,
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return ret;
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}
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static int az6007_write(struct usb_device *udev, u8 req, u16 value,
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static int az6007_read(struct dvb_usb_device *d, u8 req, u16 value,
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u16 index, u8 *b, int blen)
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{
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struct az6007_device_state *st = d->priv;
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int ret;
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if (mutex_lock_interruptible(&st->mutex) < 0)
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return -EAGAIN;
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ret = __az6007_read(d->udev, req, value, index, b, blen);
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mutex_unlock(&st->mutex);
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return ret;
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}
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static int __az6007_write(struct usb_device *udev, u8 req, u16 value,
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u16 index, u8 *b, int blen)
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{
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int ret;
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@ -158,11 +167,29 @@ static int az6007_write(struct usb_device *udev, u8 req, u16 value,
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return 0;
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}
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static int az6007_write(struct dvb_usb_device *d, u8 req, u16 value,
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u16 index, u8 *b, int blen)
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{
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struct az6007_device_state *st = d->priv;
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int ret;
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if (mutex_lock_interruptible(&st->mutex) < 0)
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return -EAGAIN;
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ret = __az6007_write(d->udev, req, value, index, b, blen);
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mutex_unlock(&st->mutex);
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return ret;
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}
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static int az6007_streaming_ctrl(struct dvb_usb_adapter *adap, int onoff)
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{
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struct dvb_usb_device *d = adap->dev;
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deb_info("%s: %s", __func__, onoff ? "enable" : "disable");
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return az6007_write(adap->dev->udev, 0xbc, onoff, 0, NULL, 0);
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return az6007_write(d, 0xbc, onoff, 0, NULL, 0);
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}
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/* keys for the enclosed remote control */
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@ -185,7 +212,7 @@ static int az6007_rc_query(struct dvb_usb_device *d, u32 * event, int *state)
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*/
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return 0;
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az6007_read(d->udev, AZ6007_READ_IR, 0, 0, key, 10);
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az6007_read(d, AZ6007_READ_IR, 0, 0, key, 10);
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if (key[1] == 0x44) {
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*state = REMOTE_NO_KEY_PRESSED;
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@ -218,7 +245,7 @@ static int az6007_rc_query(struct dvb_usb_device *d, u32 * event, int *state)
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static int az6007_read_mac_addr(struct dvb_usb_device *d, u8 mac[6])
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{
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int ret;
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ret = az6007_read(d->udev, AZ6007_READ_DATA, 6, 0, mac, 6);
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ret = az6007_read(d, AZ6007_READ_DATA, 6, 0, mac, 6);
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if (ret > 0)
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deb_info("%s: mac is %02x:%02x:%02x:%02x:%02x:%02x\n",
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@ -228,18 +255,6 @@ static int az6007_read_mac_addr(struct dvb_usb_device *d, u8 mac[6])
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return ret;
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}
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static int az6007_led_on_off(struct usb_interface *intf, int onoff)
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{
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struct usb_device *udev = interface_to_usbdev(intf);
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int ret;
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/* TS through */
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ret = az6007_write(udev, AZ6007_POWER, onoff, 0, NULL, 0);
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if (ret < 0)
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err("%s failed with error %d", __func__, ret);
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return ret;
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}
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static int az6007_frontend_attach(struct dvb_usb_adapter *adap)
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{
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struct az6007_device_state *st = adap->dev->priv;
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@ -260,11 +275,6 @@ static int az6007_frontend_attach(struct dvb_usb_adapter *adap)
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static int az6007_tuner_attach(struct dvb_usb_adapter *adap)
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{
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struct az6007_device_state *st = adap->dev->priv;
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if (st->tuner_attached)
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return 0;
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deb_info("attaching tuner mt2063");
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/* Attach mt2063 to DVB-C frontend */
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@ -278,53 +288,45 @@ static int az6007_tuner_attach(struct dvb_usb_adapter *adap)
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if (adap->fe_adap[0].fe->ops.i2c_gate_ctrl)
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adap->fe_adap[0].fe->ops.i2c_gate_ctrl(adap->fe_adap[0].fe, 0);
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st->tuner_attached = true;
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return 0;
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}
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int az6007_power_ctrl(struct dvb_usb_device *d, int onoff)
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{
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struct az6007_device_state *st = d->priv;
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struct usb_device *udev = d->udev;
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int ret;
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deb_info("%s()\n", __func__);
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if (!st->warm) {
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u8 data[6];
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mutex_init(&st->mutex);
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az6007_read(udev, FX2_OED, 1, 0, data, 1); /* {0x01} */
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az6007_read(udev, AZ6007_READ_DATA, 0, 8160, data, 1); /* {0x20} */
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az6007_read(udev, AZ6007_READ_DATA, 0, 0, data, 5); /* {0x00, 0x00, 0x00, 0x00, 0x0a} */
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az6007_read(udev, AZ6007_READ_DATA, 0, 4080, data, 6); /* {0x00, 0x08, 0x00, 0x0c, 0x22, 0x38} */
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ret = az6007_write(udev, AZ6007_POWER, 0, 2, NULL, 0);
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ret = az6007_write(d, AZ6007_POWER, 0, 2, NULL, 0);
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if (ret < 0)
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return ret;
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msleep(60);
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ret = az6007_write(udev, AZ6007_POWER, 1, 4, NULL, 0);
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ret = az6007_write(d, AZ6007_POWER, 1, 4, NULL, 0);
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if (ret < 0)
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return ret;
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msleep(100);
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ret = az6007_write(udev, AZ6007_POWER, 1, 3, NULL, 0);
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ret = az6007_write(d, AZ6007_POWER, 1, 3, NULL, 0);
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if (ret < 0)
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return ret;
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msleep(20);
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ret = az6007_write(udev, AZ6007_POWER, 1, 4, NULL, 0);
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ret = az6007_write(d, AZ6007_POWER, 1, 4, NULL, 0);
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if (ret < 0)
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return ret;
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msleep(400);
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ret = az6007_write(udev, FX2_SCON1, 0, 3, NULL, 0);
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ret = az6007_write(d, FX2_SCON1, 0, 3, NULL, 0);
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if (ret < 0)
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return ret;
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msleep (150);
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ret = az6007_write(udev, FX2_SCON1, 1, 3, NULL, 0);
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ret = az6007_write(d, FX2_SCON1, 1, 3, NULL, 0);
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if (ret < 0)
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return ret;
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msleep (430);
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ret = az6007_write(udev, AZ6007_POWER, 0, 0, NULL, 0);
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ret = az6007_write(d, AZ6007_POWER, 0, 0, NULL, 0);
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if (ret < 0)
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return ret;
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@ -336,8 +338,8 @@ int az6007_power_ctrl(struct dvb_usb_device *d, int onoff)
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if (!onoff)
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return 0;
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az6007_write(udev, AZ6007_POWER, 0, 0, NULL, 0);
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az6007_write(udev, AZ6007_TS_THROUGH, 0, 0, NULL, 0);
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az6007_write(d, AZ6007_POWER, 0, 0, NULL, 0);
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az6007_write(d, AZ6007_TS_THROUGH, 0, 0, NULL, 0);
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return 0;
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}
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@ -355,7 +357,7 @@ static int az6007_i2c_xfer(struct i2c_adapter *adap, struct i2c_msg msgs[],
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int length;
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u8 req, addr;
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if (mutex_lock_interruptible(&d->i2c_mutex) < 0)
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if (mutex_lock_interruptible(&st->mutex) < 0)
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return -EAGAIN;
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for (i = 0; i < num; i++) {
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@ -379,7 +381,7 @@ static int az6007_i2c_xfer(struct i2c_adapter *adap, struct i2c_msg msgs[],
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value = addr | (1 << 8);
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length = 6 + msgs[i + 1].len;
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len = msgs[i + 1].len;
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ret = az6007_read(d->udev, req, value, index, st->data,
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ret = __az6007_read(d->udev, req, value, index, st->data,
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length);
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if (ret >= len) {
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for (j = 0; j < len; j++) {
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@ -410,7 +412,7 @@ static int az6007_i2c_xfer(struct i2c_adapter *adap, struct i2c_msg msgs[],
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if (dvb_usb_az6007_debug & 2)
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printk(KERN_CONT "0x%02x ", st->data[j]);
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}
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ret = az6007_write(d->udev, req, value, index, st->data,
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ret = __az6007_write(d->udev, req, value, index, st->data,
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length);
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} else {
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/* read bytes */
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@ -423,7 +425,7 @@ static int az6007_i2c_xfer(struct i2c_adapter *adap, struct i2c_msg msgs[],
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value = addr;
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length = msgs[i].len + 6;
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len = msgs[i].len;
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ret = az6007_read(d->udev, req, value, index, st->data,
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ret = __az6007_read(d->udev, req, value, index, st->data,
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length);
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for (j = 0; j < len; j++) {
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msgs[i].buf[j] = st->data[j + 5];
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@ -438,7 +440,7 @@ static int az6007_i2c_xfer(struct i2c_adapter *adap, struct i2c_msg msgs[],
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goto err;
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}
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err:
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mutex_unlock(&d->i2c_mutex);
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mutex_unlock(&st->mutex);
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if (ret < 0) {
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info("%s ERROR: %i", __func__, ret);
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@ -465,16 +467,16 @@ int az6007_identify_state(struct usb_device *udev,
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u8 mac[6];
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/* Try to read the mac address */
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ret = az6007_read(udev, AZ6007_READ_DATA, 6, 0, mac, 6);
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ret = __az6007_read(udev, AZ6007_READ_DATA, 6, 0, mac, 6);
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if (ret == 6)
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*cold = 0;
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else
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*cold = 1;
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if (*cold) {
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az6007_write(udev, 0x09, 1, 0, NULL, 0);
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az6007_write(udev, 0x00, 0, 0, NULL, 0);
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az6007_write(udev, 0x00, 0, 0, NULL, 0);
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__az6007_write(udev, 0x09, 1, 0, NULL, 0);
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__az6007_write(udev, 0x00, 0, 0, NULL, 0);
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__az6007_write(udev, 0x00, 0, 0, NULL, 0);
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}
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deb_info("Device is on %s state\n", *cold? "warm" : "cold");
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@ -486,7 +488,7 @@ static struct dvb_usb_device_properties az6007_properties;
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static int az6007_usb_probe(struct usb_interface *intf,
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const struct usb_device_id *id)
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{
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az6007_led_on_off(intf, 0);
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struct usb_device *udev = interface_to_usbdev(intf);
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return dvb_usb_device_init(intf, &az6007_properties,
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THIS_MODULE, NULL, adapter_nr);
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