[media] lirc_zilog: Don't make private copies of i2c clients

Don't make private copies of the i2c clients provided by the I2C
subsystem, don't change the client address field, and don't probe
the client addresses - the bridge driver already did that.  This
moves us to the proper I2C and binding model.

Signed-off-by: Andy Walls <awalls@md.metrocast.net>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

drivers/staging/lirc/lirc_zilog.c

@@ -62,7 +62,7 @@
 
 struct IR_rx {
 	/* RX device */
-	struct i2c_client c_rx;
+	struct i2c_client *c;
 
 	/* RX device buffer & lock */
 	struct lirc_buffer buf;
@@ -81,7 +81,7 @@ struct IR_rx {
 
 struct IR_tx {
 	/* TX device */
-	struct i2c_client c_tx;
+	struct i2c_client *c;
 
 	/* TX additional actions needed */
 	int need_boot;
@@ -132,9 +132,6 @@ static struct mutex tx_data_lock;
 					## args)
 #define zilog_error(s, args...) printk(KERN_ERR KBUILD_MODNAME ": " s, ## args)
 
-#define ZILOG_HAUPPAUGE_IR_RX_NAME "Zilog/Hauppauge IR RX"
-#define ZILOG_HAUPPAUGE_IR_TX_NAME "Zilog/Hauppauge IR TX"
-
 /* module parameters */
 static int debug;	/* debug output */
 static int disable_rx;	/* disable RX device */
@@ -181,7 +178,7 @@ static int add_to_buf(struct IR *ir)
 		 * Send random "poll command" (?)  Windows driver does this
 		 * and it is a good point to detect chip failure.
 		 */
-		ret = i2c_master_send(&rx->c_rx, sendbuf, 1);
+		ret = i2c_master_send(rx->c, sendbuf, 1);
 		if (ret != 1) {
 			zilog_error("i2c_master_send failed with %d\n",	ret);
 			if (failures >= 3) {
@@ -205,7 +202,7 @@ static int add_to_buf(struct IR *ir)
 			continue;
 		}
 
-		ret = i2c_master_recv(&rx->c_rx, keybuf, sizeof(keybuf));
+		ret = i2c_master_recv(rx->c, keybuf, sizeof(keybuf));
 		mutex_unlock(&ir->ir_lock);
 		if (ret != sizeof(keybuf)) {
 			zilog_error("i2c_master_recv failed with %d -- "
@@ -315,9 +312,9 @@ static int set_use_inc(void *data)
 	 * must be possible even when the device is open
 	 */
 	if (ir->rx != NULL)
-		i2c_use_client(&ir->rx->c_rx);
+		i2c_use_client(ir->rx->c);
 	if (ir->tx != NULL)
-		i2c_use_client(&ir->tx->c_tx);
+		i2c_use_client(ir->tx->c);
 
 	return 0;
 }
@@ -327,9 +324,9 @@ static void set_use_dec(void *data)
 	struct IR *ir = data;
 
 	if (ir->rx)
-		i2c_release_client(&ir->rx->c_rx);
+		i2c_release_client(ir->rx->c);
 	if (ir->tx)
-		i2c_release_client(&ir->tx->c_tx);
+		i2c_release_client(ir->tx->c);
 	if (ir->l.owner != NULL)
 		module_put(ir->l.owner);
 }
@@ -482,7 +479,7 @@ static int send_data_block(struct IR_tx *tx, unsigned char *data_block)
 			buf[1 + j] = data_block[i + j];
 		dprintk("%02x %02x %02x %02x %02x",
 			buf[0], buf[1], buf[2], buf[3], buf[4]);
-		ret = i2c_master_send(&tx->c_tx, buf, tosend + 1);
+		ret = i2c_master_send(tx->c, buf, tosend + 1);
 		if (ret != tosend + 1) {
 			zilog_error("i2c_master_send failed with %d\n", ret);
 			return ret < 0 ? ret : -EFAULT;
@@ -506,19 +503,19 @@ static int send_boot_data(struct IR_tx *tx)
 	/* kick it off? */
 	buf[0] = 0x00;
 	buf[1] = 0x20;
-	ret = i2c_master_send(&tx->c_tx, buf, 2);
+	ret = i2c_master_send(tx->c, buf, 2);
 	if (ret != 2) {
 		zilog_error("i2c_master_send failed with %d\n", ret);
 		return ret < 0 ? ret : -EFAULT;
 	}
-	ret = i2c_master_send(&tx->c_tx, buf, 1);
+	ret = i2c_master_send(tx->c, buf, 1);
 	if (ret != 1) {
 		zilog_error("i2c_master_send failed with %d\n", ret);
 		return ret < 0 ? ret : -EFAULT;
 	}
 
 	/* Here comes the firmware version... (hopefully) */
-	ret = i2c_master_recv(&tx->c_tx, buf, 4);
+	ret = i2c_master_recv(tx->c, buf, 4);
 	if (ret != 4) {
 		zilog_error("i2c_master_recv failed with %d\n", ret);
 		return 0;
@@ -573,7 +570,7 @@ static int fw_load(struct IR_tx *tx)
 	}
 
 	/* Request codeset data file */
-	ret = request_firmware(&fw_entry, "haup-ir-blaster.bin", &tx->c_tx.dev);
+	ret = request_firmware(&fw_entry, "haup-ir-blaster.bin", &tx->c->dev);
 	if (ret != 0) {
 		zilog_error("firmware haup-ir-blaster.bin not available "
 			    "(%d)\n", ret);
@@ -822,19 +819,19 @@ static int send_code(struct IR_tx *tx, unsigned int code, unsigned int key)
 	/* Send data block length? */
 	buf[0] = 0x00;
 	buf[1] = 0x40;
-	ret = i2c_master_send(&tx->c_tx, buf, 2);
+	ret = i2c_master_send(tx->c, buf, 2);
 	if (ret != 2) {
 		zilog_error("i2c_master_send failed with %d\n", ret);
 		return ret < 0 ? ret : -EFAULT;
 	}
-	ret = i2c_master_send(&tx->c_tx, buf, 1);
+	ret = i2c_master_send(tx->c, buf, 1);
 	if (ret != 1) {
 		zilog_error("i2c_master_send failed with %d\n", ret);
 		return ret < 0 ? ret : -EFAULT;
 	}
 
 	/* Send finished download? */
-	ret = i2c_master_recv(&tx->c_tx, buf, 1);
+	ret = i2c_master_recv(tx->c, buf, 1);
 	if (ret != 1) {
 		zilog_error("i2c_master_recv failed with %d\n", ret);
 		return ret < 0 ? ret : -EFAULT;
@@ -848,7 +845,7 @@ static int send_code(struct IR_tx *tx, unsigned int code, unsigned int key)
 	/* Send prepare command? */
 	buf[0] = 0x00;
 	buf[1] = 0x80;
-	ret = i2c_master_send(&tx->c_tx, buf, 2);
+	ret = i2c_master_send(tx->c, buf, 2);
 	if (ret != 2) {
 		zilog_error("i2c_master_send failed with %d\n", ret);
 		return ret < 0 ? ret : -EFAULT;
@@ -873,7 +870,7 @@ static int send_code(struct IR_tx *tx, unsigned int code, unsigned int key)
 	for (i = 0; i < 20; ++i) {
 		set_current_state(TASK_UNINTERRUPTIBLE);
 		schedule_timeout((50 * HZ + 999) / 1000);
-		ret = i2c_master_send(&tx->c_tx, buf, 1);
+		ret = i2c_master_send(tx->c, buf, 1);
 		if (ret == 1)
 			break;
 		dprintk("NAK expected: i2c_master_send "
@@ -886,7 +883,7 @@ static int send_code(struct IR_tx *tx, unsigned int code, unsigned int key)
 	}
 
 	/* Seems to be an 'ok' response */
-	i = i2c_master_recv(&tx->c_tx, buf, 1);
+	i = i2c_master_recv(tx->c, buf, 1);
 	if (i != 1) {
 		zilog_error("i2c_master_recv failed with %d\n", ret);
 		return -EFAULT;
@@ -1214,7 +1211,6 @@ static int ir_probe(struct i2c_client *client, const struct i2c_device_id *id)
 {
 	struct IR *ir = NULL;
 	struct i2c_adapter *adap = client->adapter;
-	char buf;
 	int ret;
 	int have_rx = 0, have_tx = 0;
 
@@ -1239,24 +1235,13 @@ static int ir_probe(struct i2c_client *client, const struct i2c_device_id *id)
 	 * The external IR receiver is at i2c address 0x71.
 	 * The IR transmitter is at 0x70.
 	 */
-	client->addr = 0x70;
 
-	if (i2c_master_recv(client, &buf, 1) == 1)
+	if (id->driver_data & ID_FLAG_TX) {
 		have_tx = 1;
-	dprintk("probe 0x70 @ %s: %s\n",
-		adap->name, have_tx ? "success" : "failed");
-
-	if (!disable_rx) {
-		client->addr = 0x71;
-		if (i2c_master_recv(client, &buf, 1) == 1)
-			have_rx = 1;
-		dprintk("probe 0x71 @ %s: %s\n",
-			adap->name, have_rx ? "success" : "failed");
-	}
-
-	if (!(have_rx || have_tx)) {
-		zilog_error("%s: no devices found\n", adap->name);
-		goto out_nodev;
+	} else if (!disable_rx) {
+		have_rx = 1;
+	} else {
+		return -ENXIO;
 	}
 
 	printk(KERN_INFO "lirc_zilog: chip found with %s\n",
@@ -1270,6 +1255,7 @@ static int ir_probe(struct i2c_client *client, const struct i2c_device_id *id)
 	if (have_tx) {
 		ir->tx = kzalloc(sizeof(struct IR_tx), GFP_KERNEL);
 		if (ir->tx != NULL) {
+			ir->tx->c = client;
 			ir->tx->need_boot = 1;
 			ir->tx->post_tx_ready_poll =
 			       (id->driver_data & ID_FLAG_HDPVR) ? false : true;
@@ -1282,6 +1268,7 @@ static int ir_probe(struct i2c_client *client, const struct i2c_device_id *id)
 		if (ir->rx == NULL) {
 			ret = -ENOMEM;
 		} else {
+			ir->rx->c = client;
 			ir->rx->hdpvr_data_fmt =
 			       (id->driver_data & ID_FLAG_HDPVR) ? true : false;
 			mutex_init(&ir->rx->buf_lock);
@@ -1305,11 +1292,6 @@ static int ir_probe(struct i2c_client *client, const struct i2c_device_id *id)
 	/* initialise RX device */
 	if (ir->rx != NULL) {
 		DECLARE_COMPLETION(tn);
-		memcpy(&ir->rx->c_rx, client, sizeof(struct i2c_client));
-
-		ir->rx->c_rx.addr = 0x71;
-		strlcpy(ir->rx->c_rx.name, ZILOG_HAUPPAUGE_IR_RX_NAME,
-			I2C_NAME_SIZE);
 
 		/* try to fire up polling thread */
 		ir->rx->t_notify = &tn;
@@ -1324,14 +1306,6 @@ static int ir_probe(struct i2c_client *client, const struct i2c_device_id *id)
 		ir->rx->t_notify = NULL;
 	}
 
-	/* initialise TX device */
-	if (ir->tx) {
-		memcpy(&ir->tx->c_tx, client, sizeof(struct i2c_client));
-		ir->tx->c_tx.addr = 0x70;
-		strlcpy(ir->tx->c_tx.name, ZILOG_HAUPPAUGE_IR_TX_NAME,
-			I2C_NAME_SIZE);
-	}
-
 	/* set lirc_dev stuff */
 	ir->l.code_length = 13;
 	ir->l.rbuf	  = (ir->rx == NULL) ? NULL : &ir->rx->buf;
@@ -1371,16 +1345,11 @@ err:
 	/* FIXME - memory deallocation for all error cases needs work */
 	/* undo everything, hopefully... */
 	if (ir->rx != NULL)
-		ir_remove(&ir->rx->c_rx);
+		ir_remove(ir->rx->c);
 	if (ir->tx != NULL)
-		ir_remove(&ir->tx->c_tx);
+		ir_remove(ir->tx->c);
 	return ret;
 
-out_nodev:
-	/* FIXME - memory deallocation for all error cases needs work */
-	zilog_error("no device found\n");
-	return -ENODEV;
-
 out_nomem:
 	/* FIXME - memory deallocation for all error cases needs work */
 	zilog_error("memory allocation failure\n");