V4L/DVB (12956): Fix gpio mutex in NetUP Dual DVB-S2 CI card.

The card uses the same cx23885 gpio lines for two adapters.
In case of there is several cards in system we must implement
gpio mutex per cx23885 chip.
Signed-off-by: Abylay Ospan <aospan@netup.ru>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

drivers/media/video/cx23885/cimax2.c

@@ -75,7 +75,6 @@ struct netup_ci_state {
 	void *priv;
 };
 
-struct mutex gpio_mutex;/* Two CiMax's uses same GPIO lines */
 
 int netup_read_i2c(struct i2c_adapter *i2c_adap, u8 addr, u8 reg,
 						u8 *buf, int len)
@@ -183,10 +182,11 @@ int netup_ci_op_cam(struct dvb_ca_en50221 *en50221, int slot,
 	if (ret != 0)
 		return ret;
 
-	mutex_lock(&gpio_mutex);
+	mutex_lock(&dev->gpio_lock);
 
 	/* write addr */
 	cx_write(MC417_OEN, NETUP_EN_ALL);
+	msleep(2);
 	cx_write(MC417_RWD, NETUP_CTRL_OFF |
 				NETUP_ADLO | (0xff & addr));
 	cx_clear(MC417_RWD, NETUP_ADLO);
@@ -194,9 +194,10 @@ int netup_ci_op_cam(struct dvb_ca_en50221 *en50221, int slot,
 				NETUP_ADHI | (0xff & (addr >> 8)));
 	cx_clear(MC417_RWD, NETUP_ADHI);
 
-	if (read) /* data in */
+	if (read) { /* data in */
 		cx_write(MC417_OEN, NETUP_EN_ALL | NETUP_DATA);
-	else /* data out */
+		msleep(2);
+	} else /* data out */
 		cx_write(MC417_RWD, NETUP_CTRL_OFF | data);
 
 	/* choose chip */
@@ -206,7 +207,7 @@ int netup_ci_op_cam(struct dvb_ca_en50221 *en50221, int slot,
 	cx_clear(MC417_RWD, (read) ? NETUP_RD : NETUP_WR);
 	mem = netup_ci_get_mem(dev);
 
-	mutex_unlock(&gpio_mutex);
+	mutex_unlock(&dev->gpio_lock);
 
 	if (!read)
 		if (mem < 0)
@@ -403,7 +404,6 @@ int netup_ci_init(struct cx23885_tsport *port)
 	switch (port->nr) {
 	case 1:
 		state->ci_i2c_addr = 0x40;
-		mutex_init(&gpio_mutex);
 		break;
 	case 2:
 		state->ci_i2c_addr = 0x41;

drivers/media/video/cx23885/cx23885-core.c

@@ -758,6 +758,7 @@ static int cx23885_dev_setup(struct cx23885_dev *dev)
 	int i;
 
 	mutex_init(&dev->lock);
+	mutex_init(&dev->gpio_lock);
 
 	atomic_inc(&dev->refcount);
 

drivers/media/video/cx23885/cx23885.h

@@ -325,6 +325,7 @@ struct cx23885_dev {
 
 	int                        nr;
 	struct mutex               lock;
+	struct mutex               gpio_lock;
 
 	/* board details */
 	unsigned int               board;