This fixes:
- rx_overflow while holding down any down button on a nec remote
- suspend/resume
- stop receiver on rmmod
- advertise rx_resolution and timeout properly
- code simplify
- ignore unsupported firmware versions
Signed-off-by: Sean Young <sean@xxxxxxxx>
---
drivers/media/rc/Kconfig | 8 +-
drivers/media/rc/iguanair.c | 206 ++++++++++++++++++++++----------------------
2 files changed, 107 insertions(+), 107 deletions(-)
diff --git a/drivers/media/rc/Kconfig b/drivers/media/rc/Kconfig
index 5180390..fa1745c 100644
--- a/drivers/media/rc/Kconfig
+++ b/drivers/media/rc/Kconfig
@@ -264,8 +264,12 @@ config IR_IGUANA
depends on RC_CORE
select USB
---help---
- Say Y here if you want to use the IgaunaWorks USB IR Transceiver.
- Both infrared receive and send are supported.
+ Say Y here if you want to use the IguanaWorks USB IR Transceiver.
+ Both infrared receive and send are supported. If you want to
+ change the ID or the pin config, use the user space driver from
+ IguanaWorks.
+
+ Only firmware 0x0205 and later is supported.
To compile this driver as a module, choose M here: the module will
be called iguanair.
diff --git a/drivers/media/rc/iguanair.c b/drivers/media/rc/iguanair.c
index 5e2eaf8..aa7f34f 100644
--- a/drivers/media/rc/iguanair.c
+++ b/drivers/media/rc/iguanair.c
@@ -35,9 +35,9 @@ struct iguanair {
struct device *dev;
struct usb_device *udev;
- int pipe_in, pipe_out;
+ int pipe_out;
+ uint16_t version;
uint8_t bufsize;
- uint8_t version[2];
struct mutex lock;
@@ -61,20 +61,21 @@ struct iguanair {
};
#define CMD_GET_VERSION 0x01
-#define CMD_GET_BUFSIZE 0x11
#define CMD_GET_FEATURES 0x10
+#define CMD_GET_BUFSIZE 0x11
+#define CMD_RECEIVER_ON 0x12
+#define CMD_RECEIVER_OFF 0x14
#define CMD_SEND 0x15
-#define CMD_EXECUTE 0x1f
+#define CMD_GET_ID 0x1f
#define CMD_RX_OVERFLOW 0x31
#define CMD_TX_OVERFLOW 0x32
-#define CMD_RECEIVER_ON 0x12
-#define CMD_RECEIVER_OFF 0x14
#define DIR_IN 0xdc
#define DIR_OUT 0xcd
#define MAX_PACKET_SIZE 8u
#define TIMEOUT 1000
+#define RX_RESOLUTION 21330
struct packet {
uint16_t start;
@@ -82,11 +83,6 @@ struct packet {
uint8_t cmd;
};
-struct response_packet {
- struct packet header;
- uint8_t data[4];
-};
-
struct send_packet {
struct packet header;
uint8_t length;
@@ -96,10 +92,46 @@ struct send_packet {
uint8_t payload[0];
};
+/*
+ * The hardware advertises a polling interval of 10ms. This is far too
+ * slow and will cause regular rx overflows.
+ */
+static int int_urb_interval(struct usb_device *udev)
+{
+ switch (udev->speed) {
+ case USB_SPEED_HIGH:
+ return 4;
+ case USB_SPEED_LOW:
+ return 1;
+ case USB_SPEED_FULL:
+ default:
+ return 1;
+ }
+}
+
static void process_ir_data(struct iguanair *ir, unsigned len)
{
if (len >= 4 && ir->buf_in[0] == 0 && ir->buf_in[1] == 0) {
switch (ir->buf_in[3]) {
+ case CMD_GET_VERSION:
+ if (len == 6) {
+ ir->version = (ir->buf_in[5] << 8) |
+ ir->buf_in[4];
+ complete(&ir->completion);
+ }
+ break;
+ case CMD_GET_BUFSIZE:
+ if (len >= 5) {
+ ir->bufsize = ir->buf_in[4];
+ complete(&ir->completion);
+ }
+ break;
+ case CMD_GET_FEATURES:
+ if (len > 5) {
+ ir->cycle_overhead = ir->buf_in[5];
+ complete(&ir->completion);
+ }
+ break;
case CMD_TX_OVERFLOW:
ir->tx_overflow = true;
case CMD_RECEIVER_OFF:
@@ -109,6 +141,7 @@ static void process_ir_data(struct iguanair *ir, unsigned len)
break;
case CMD_RX_OVERFLOW:
dev_warn(ir->dev, "receive overflow\n");
+ ir_raw_event_reset(ir->rc);
break;
default:
dev_warn(ir->dev, "control code %02x received\n",
@@ -128,7 +161,7 @@ static void process_ir_data(struct iguanair *ir, unsigned len)
} else {
rawir.pulse = (ir->buf_in[i] & 0x80) == 0;
rawir.duration = ((ir->buf_in[i] & 0x7f) + 1) *
- 21330;
+ RX_RESOLUTION;
}
ir_raw_event_store_with_filter(ir->rc, &rawir);
@@ -141,6 +174,7 @@ static void process_ir_data(struct iguanair *ir, unsigned len)
static void iguanair_rx(struct urb *urb)
{
struct iguanair *ir;
+ int rc;
if (!urb)
return;
@@ -166,34 +200,27 @@ static void iguanair_rx(struct urb *urb)
break;
}
- usb_submit_urb(urb, GFP_ATOMIC);
+ rc = usb_submit_urb(urb, GFP_ATOMIC);
+ if (rc && rc != -ENODEV)
+ dev_warn(ir->dev, "failed to resubmit urb: %d\n", rc);
}
-static int iguanair_send(struct iguanair *ir, void *data, unsigned size,
- struct response_packet *response, unsigned *res_len)
+static int iguanair_send(struct iguanair *ir, void *data, unsigned size)
{
- unsigned offset, len;
int rc, transferred;
- for (offset = 0; offset < size; offset += MAX_PACKET_SIZE) {
- len = min(size - offset, MAX_PACKET_SIZE);
+ INIT_COMPLETION(ir->completion);
- if (ir->tx_overflow)
- return -EOVERFLOW;
+ rc = usb_interrupt_msg(ir->udev, ir->pipe_out, data, size,
+ &transferred, TIMEOUT);
+ if (rc)
+ return rc;
- rc = usb_interrupt_msg(ir->udev, ir->pipe_out, data + offset,
- len, &transferred, TIMEOUT);
- if (rc)
- return rc;
+ if (transferred != size)
+ return -EIO;
- if (transferred != len)
- return -EIO;
- }
-
- if (response) {
- rc = usb_interrupt_msg(ir->udev, ir->pipe_in, response,
- sizeof(*response), res_len, TIMEOUT);
- }
+ if (wait_for_completion_timeout(&ir->completion, TIMEOUT) == 0)
+ return -ETIMEDOUT;
return rc;
}
@@ -201,66 +228,43 @@ static int iguanair_send(struct iguanair *ir, void *data, unsigned size,
static int iguanair_get_features(struct iguanair *ir)
{
struct packet packet;
- struct response_packet response;
- int rc, len;
+ int rc;
packet.start = 0;
packet.direction = DIR_OUT;
packet.cmd = CMD_GET_VERSION;
- rc = iguanair_send(ir, &packet, sizeof(packet), &response, &len);
+ rc = iguanair_send(ir, &packet, sizeof(packet));
if (rc) {
dev_info(ir->dev, "failed to get version\n");
goto out;
}
- if (len != 6) {
- dev_info(ir->dev, "failed to get version\n");
- rc = -EIO;
+ if (ir->version < 0x205) {
+ dev_err(ir->dev, "firmware 0x%04x is too old\n", ir->version);
+ rc = -ENODEV;
goto out;
}
- ir->version[0] = response.data[0];
- ir->version[1] = response.data[1];
ir->bufsize = 150;
ir->cycle_overhead = 65;
packet.cmd = CMD_GET_BUFSIZE;
- rc = iguanair_send(ir, &packet, sizeof(packet), &response, &len);
+ rc = iguanair_send(ir, &packet, sizeof(packet));
if (rc) {
dev_info(ir->dev, "failed to get buffer size\n");
goto out;
}
- if (len != 5) {
- dev_info(ir->dev, "failed to get buffer size\n");
- rc = -EIO;
- goto out;
- }
-
- ir->bufsize = response.data[0];
-
- if (ir->version[0] == 0 || ir->version[1] == 0)
- goto out;
-
packet.cmd = CMD_GET_FEATURES;
- rc = iguanair_send(ir, &packet, sizeof(packet), &response, &len);
+ rc = iguanair_send(ir, &packet, sizeof(packet));
if (rc) {
dev_info(ir->dev, "failed to get features\n");
goto out;
}
- if (len < 5) {
- dev_info(ir->dev, "failed to get features\n");
- rc = -EIO;
- goto out;
- }
-
- if (len > 5 && ir->version[0] >= 4)
- ir->cycle_overhead = response.data[1];
-
out:
return rc;
}
@@ -269,17 +273,11 @@ static int iguanair_receiver(struct iguanair *ir, bool enable)
{
struct packet packet = { 0, DIR_OUT, enable ?
CMD_RECEIVER_ON : CMD_RECEIVER_OFF };
- int rc;
-
- INIT_COMPLETION(ir->completion);
-
- rc = iguanair_send(ir, &packet, sizeof(packet), NULL, NULL);
- if (rc)
- return rc;
- wait_for_completion_timeout(&ir->completion, TIMEOUT);
+ if (enable)
+ ir_raw_event_reset(ir->rc);
- return 0;
+ return iguanair_send(ir, &packet, sizeof(packet));
}
/*
@@ -406,17 +404,10 @@ static int iguanair_tx(struct rc_dev *dev, unsigned *txbuf, unsigned count)
ir->tx_overflow = false;
- INIT_COMPLETION(ir->completion);
-
- rc = iguanair_send(ir, packet, size + 8, NULL, NULL);
+ rc = iguanair_send(ir, packet, size + 8);
- if (rc == 0) {
- wait_for_completion_timeout(&ir->completion, TIMEOUT);
- if (ir->tx_overflow)
- rc = -EOVERFLOW;
- }
-
- ir->tx_overflow = false;
+ if (rc == 0 && ir->tx_overflow)
+ rc = -EOVERFLOW;
if (ir->receiver_on) {
if (iguanair_receiver(ir, true))
@@ -437,8 +428,6 @@ static int iguanair_open(struct rc_dev *rdev)
mutex_lock(&ir->lock);
- usb_submit_urb(ir->urb_in, GFP_KERNEL);
-
BUG_ON(ir->receiver_on);
rc = iguanair_receiver(ir, true);
@@ -459,11 +448,9 @@ static void iguanair_close(struct rc_dev *rdev)
rc = iguanair_receiver(ir, false);
ir->receiver_on = false;
- if (rc)
+ if (rc && rc != -ENODEV)
dev_warn(ir->dev, "failed to disable receiver: %d\n", rc);
- usb_kill_urb(ir->urb_in);
-
mutex_unlock(&ir->lock);
}
@@ -473,7 +460,7 @@ static int __devinit iguanair_probe(struct usb_interface *intf,
struct usb_device *udev = interface_to_usbdev(intf);
struct iguanair *ir;
struct rc_dev *rc;
- int ret;
+ int ret, pipein;
struct usb_host_interface *idesc;
ir = kzalloc(sizeof(*ir), GFP_KERNEL);
@@ -502,28 +489,29 @@ static int __devinit iguanair_probe(struct usb_interface *intf,
ir->rc = rc;
ir->dev = &intf->dev;
ir->udev = udev;
- ir->pipe_in = usb_rcvintpipe(udev,
- idesc->endpoint[0].desc.bEndpointAddress);
ir->pipe_out = usb_sndintpipe(udev,
idesc->endpoint[1].desc.bEndpointAddress);
mutex_init(&ir->lock);
init_completion(&ir->completion);
- ret = iguanair_get_features(ir);
+ pipein = usb_rcvintpipe(udev, idesc->endpoint[0].desc.bEndpointAddress);
+ usb_fill_int_urb(ir->urb_in, udev, pipein, ir->buf_in,
+ MAX_PACKET_SIZE, iguanair_rx, ir, int_urb_interval(udev));
+ ir->urb_in->transfer_dma = ir->dma_in;
+ ir->urb_in->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
+
+ ret = usb_submit_urb(ir->urb_in, GFP_KERNEL);
if (ret) {
- dev_warn(&intf->dev, "failed to get device features");
+ dev_warn(&intf->dev, "failed to submit urb: %d\n", ret);
goto out;
}
- usb_fill_int_urb(ir->urb_in, ir->udev, ir->pipe_in, ir->buf_in,
- MAX_PACKET_SIZE, iguanair_rx, ir,
- idesc->endpoint[0].desc.bInterval);
- ir->urb_in->transfer_dma = ir->dma_in;
- ir->urb_in->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
+ ret = iguanair_get_features(ir);
+ if (ret)
+ goto out2;
snprintf(ir->name, sizeof(ir->name),
- "IguanaWorks USB IR Transceiver version %d.%d",
- ir->version[0], ir->version[1]);
+ "IguanaWorks USB IR Transceiver version 0x%04x", ir->version);
usb_make_path(ir->udev, ir->phys, sizeof(ir->phys));
@@ -540,21 +528,23 @@ static int __devinit iguanair_probe(struct usb_interface *intf,
rc->s_tx_carrier = iguanair_set_tx_carrier;
rc->tx_ir = iguanair_tx;
rc->driver_name = DRIVER_NAME;
- rc->map_name = RC_MAP_EMPTY;
+ rc->map_name = RC_MAP_RC6_MCE;
+ rc->timeout = MS_TO_NS(100);
+ rc->rx_resolution = RX_RESOLUTION;
iguanair_set_tx_carrier(rc, 38000);
ret = rc_register_device(rc);
if (ret < 0) {
dev_err(&intf->dev, "failed to register rc device %d", ret);
- goto out;
+ goto out2;
}
usb_set_intfdata(intf, ir);
- dev_info(&intf->dev, "Registered %s", ir->name);
-
return 0;
+out2:
+ usb_kill_urb(ir->urb_in);
out:
if (ir) {
usb_free_urb(ir->urb_in);
@@ -570,12 +560,11 @@ static void __devexit iguanair_disconnect(struct usb_interface *intf)
{
struct iguanair *ir = usb_get_intfdata(intf);
+ rc_unregister_device(ir->rc);
usb_set_intfdata(intf, NULL);
-
usb_kill_urb(ir->urb_in);
usb_free_urb(ir->urb_in);
usb_free_coherent(ir->udev, MAX_PACKET_SIZE, ir->buf_in, ir->dma_in);
- rc_unregister_device(ir->rc);
kfree(ir);
}
@@ -592,6 +581,8 @@ static int iguanair_suspend(struct usb_interface *intf, pm_message_t message)
dev_warn(ir->dev, "failed to disable receiver for suspend\n");
}
+ usb_kill_urb(ir->urb_in);
+
mutex_unlock(&ir->lock);
return rc;
@@ -604,6 +595,10 @@ static int iguanair_resume(struct usb_interface *intf)
mutex_lock(&ir->lock);
+ rc = usb_submit_urb(ir->urb_in, GFP_KERNEL);
+ if (rc)
+ dev_warn(&intf->dev, "failed to submit urb: %d\n", rc);
+
if (ir->receiver_on) {
rc = iguanair_receiver(ir, true);
if (rc)
@@ -627,7 +622,8 @@ static struct usb_driver iguanair_driver = {
.suspend = iguanair_suspend,
.resume = iguanair_resume,
.reset_resume = iguanair_resume,
- .id_table = iguanair_table
+ .id_table = iguanair_table,
+ .soft_unbind = 1 /* we want to disable receiver on unbind */
};
module_usb_driver(iguanair_driver);
--
1.7.11.2
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