* [PATCH 2/3] media: rc: new driver for USB-UIRT device
2021-05-04 17:52 [PATCH 0/3] IR driver for USB-UIRT device Sean Young
2021-05-04 17:52 ` [PATCH 1/3] USB: serial: move ftdi_sio.h into include directories Sean Young
@ 2021-05-04 17:52 ` Sean Young
2021-05-05 8:50 ` Oliver Neukum
2021-05-04 17:52 ` [PATCH 3/3] USB: serial: blacklist USB-UIRT when driver is selected Sean Young
2 siblings, 1 reply; 8+ messages in thread
From: Sean Young @ 2021-05-04 17:52 UTC (permalink / raw)
To: linux-media, linux-usb, Johan Hovold, Greg Kroah-Hartman, Jon Rhees
See http://www.usbuirt.com/
Signed-off-by: Sean Young <sean@mess.org>
---
drivers/media/rc/Kconfig | 11 +
drivers/media/rc/Makefile | 1 +
drivers/media/rc/uirt.c | 737 ++++++++++++++++++++++++++++++++++++++
3 files changed, 749 insertions(+)
create mode 100644 drivers/media/rc/uirt.c
diff --git a/drivers/media/rc/Kconfig b/drivers/media/rc/Kconfig
index f016b35c2b17..dff85a5bfd1e 100644
--- a/drivers/media/rc/Kconfig
+++ b/drivers/media/rc/Kconfig
@@ -532,6 +532,17 @@ config IR_TOY
To compile this driver as a module, choose M here: the module will be
called ir_toy.
+config IR_UIRT
+ tristate "USB-UIRT"
+ depends on RC_CORE
+ depends on USB_ARCH_HAS_HCD
+ help
+ Say Y here if you want to use the USB-UIRT. See
+ http://www.usbuirt.com/
+
+ To compile this driver as a module, choose M here: the module will be
+ called uirt.
+
endif #RC_DEVICES
endif #RC_CORE
diff --git a/drivers/media/rc/Makefile b/drivers/media/rc/Makefile
index 4927f585ebc2..17037915e742 100644
--- a/drivers/media/rc/Makefile
+++ b/drivers/media/rc/Makefile
@@ -50,3 +50,4 @@ obj-$(CONFIG_IR_MTK) += mtk-cir.o
obj-$(CONFIG_IR_TANGO) += tango-ir.o
obj-$(CONFIG_RC_XBOX_DVD) += xbox_remote.o
obj-$(CONFIG_IR_TOY) += ir_toy.o
+obj-$(CONFIG_IR_UIRT) += uirt.o
diff --git a/drivers/media/rc/uirt.c b/drivers/media/rc/uirt.c
new file mode 100644
index 000000000000..161c47f1cd3f
--- /dev/null
+++ b/drivers/media/rc/uirt.c
@@ -0,0 +1,737 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+/*
+ * USB-UIRT
+ *
+ * Copyright (C) 2021 Sean Young <sean@mess.org>
+ *
+ * See http://www.usbuirt.com/USB-UIRT%20Command%20Protocol.doc
+ */
+
+#include <linux/completion.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/usb.h>
+#include <linux/slab.h>
+#include <linux/usb/input.h>
+#include <linux/usb/ftdi_sio.h>
+
+#include <media/rc-core.h>
+
+static const u8 CMD_GET_VERSION[] = { 0x23, 0xdd };
+static const u8 CMD_SETMODERAW[] = { 0x21, 0xdf };
+static const u8 CMD_SETWIDEBAND[] = { 0x24, 0xdc };
+
+#define WDR_TIMEOUT 5000 /* default urb timeout */
+#define WDR_SHORT_TIMEOUT 1000 /* shorter urb timeout */
+#define UNIT_US 50
+#define IR_TIMEOUT 12500
+#define MAX_PACKET 64
+
+enum cmd_state {
+ CMD_STATE_GET_VERSION,
+ CMD_STATE_SET_MODE_RAW,
+ CMD_STATE_SET_MODE_WIDEBAND,
+ CMD_STATE_IRDATA,
+ CMD_STATE_SHORT_TX,
+ CMD_STATE_STREAMING_TX,
+};
+
+enum rx_state {
+ RX_STATE_INTERSPACE_HIGH,
+ RX_STATE_INTERSPACE_LOW,
+ RX_STATE_ON_HIGH,
+ RX_STATE_ON_LOW,
+ RX_STATE_FREQ_HIGH,
+ RX_STATE_FREQ_LOW,
+ RX_STATE_OFF_HIGH,
+ RX_STATE_OFF_LOW,
+};
+
+struct uirt {
+ struct device *dev;
+ struct usb_device *usbdev;
+
+ struct rc_dev *rc;
+ struct urb *urb_in, *urb_out;
+
+ u8 *in;
+ u8 *out;
+ struct completion cmd_done;
+ u8 freq;
+ u8 high;
+ bool wideband;
+ u32 last_duration;
+
+ enum cmd_state cmd_state;
+ enum rx_state rx_state;
+
+ void *tx_buf;
+ uint tx_len;
+
+ char phys[64];
+};
+
+// read IR in raw mode
+static void uirt_raw_mode(struct uirt *uirt, u32 len)
+{
+ uint i, duration;
+
+ for (i = 2; i < len; i++) {
+ switch (uirt->rx_state) {
+ case RX_STATE_INTERSPACE_HIGH:
+ uirt->rx_state = RX_STATE_INTERSPACE_LOW;
+ break;
+ case RX_STATE_INTERSPACE_LOW:
+ uirt->rx_state = RX_STATE_ON_HIGH;
+ break;
+ case RX_STATE_ON_HIGH:
+ duration = uirt->in[i];
+ if (duration == 0)
+ duration = 1;
+
+ ir_raw_event_store(uirt->rc, &((struct ir_raw_event) {
+ .duration = duration * UNIT_US,
+ .pulse = true,
+ }));
+
+ uirt->rx_state = RX_STATE_OFF_HIGH;
+ break;
+ case RX_STATE_OFF_HIGH:
+ if (uirt->in[i] == 0xff) {
+ ir_raw_event_store(uirt->rc, &((struct ir_raw_event) {
+ .duration = IR_TIMEOUT,
+ .timeout = true,
+ }));
+ uirt->rx_state = RX_STATE_INTERSPACE_HIGH;
+ break;
+ }
+
+ duration = uirt->in[i];
+ if (duration == 0)
+ duration = 1;
+
+ ir_raw_event_store(uirt->rc, &((struct ir_raw_event) {
+ .duration = duration * UNIT_US,
+ .pulse = false,
+ }));
+ uirt->rx_state = RX_STATE_ON_HIGH;
+ break;
+ default:
+ WARN(1, "unreachable state");
+ uirt->rx_state = RX_STATE_INTERSPACE_HIGH;
+ break;
+ }
+ }
+
+ ir_raw_event_handle(uirt->rc);
+}
+
+// read IR in wideband mode
+static void uirt_wideband(struct uirt *uirt, u32 len)
+{
+ uint i, duration, carrier, pulses;
+
+ for (i = 2; i < len; i++) {
+ switch (uirt->rx_state) {
+ case RX_STATE_INTERSPACE_HIGH:
+ uirt->rx_state = RX_STATE_INTERSPACE_LOW;
+ break;
+ case RX_STATE_INTERSPACE_LOW:
+ uirt->rx_state = RX_STATE_ON_HIGH;
+ break;
+ case RX_STATE_ON_HIGH:
+ uirt->high = uirt->in[i];
+ uirt->rx_state = RX_STATE_ON_LOW;
+ break;
+ case RX_STATE_ON_LOW:
+ // duration is in 400ns units
+ duration = (uirt->high << 8) | uirt->in[i];
+ uirt->last_duration = duration;
+ ir_raw_event_store(uirt->rc, &((struct ir_raw_event) {
+ .duration = DIV_ROUND_CLOSEST(duration * 2, 5),
+ .pulse = true,
+ }));
+ uirt->rx_state = RX_STATE_FREQ_HIGH;
+ break;
+ case RX_STATE_FREQ_HIGH:
+ if (uirt->in[i] & 0x80) {
+ uirt->high = uirt->in[i] & 0x7f;
+ uirt->rx_state = RX_STATE_FREQ_LOW;
+ } else if (!uirt->in[i]) {
+ uirt->rx_state = RX_STATE_OFF_HIGH;
+ } else {
+ dev_dbg(uirt->dev, "carrier duration2 %u pulses %u",
+ uirt->last_duration, uirt->in[i]);
+
+ carrier = DIV_ROUND_CLOSEST_ULL(uirt->in[i] * 10000000ull,
+ uirt->last_duration * 4);
+ ir_raw_event_store(uirt->rc, &((struct ir_raw_event) {
+ .carrier = carrier,
+ .carrier_report = true,
+ }));
+
+ uirt->rx_state = RX_STATE_OFF_HIGH;
+ }
+ break;
+ case RX_STATE_FREQ_LOW:
+ pulses = (uirt->high << 8) | uirt->in[i];
+ if (pulses) {
+ dev_dbg(uirt->dev, "carrier duration %u pulses %u",
+ uirt->last_duration, pulses);
+
+ carrier = DIV_ROUND_CLOSEST_ULL(pulses * 10000000ull,
+ uirt->last_duration * 4);
+ ir_raw_event_store(uirt->rc, &((struct ir_raw_event) {
+ .carrier = carrier,
+ .carrier_report = true,
+ }));
+ }
+ uirt->rx_state = RX_STATE_OFF_HIGH;
+ break;
+ case RX_STATE_OFF_HIGH:
+ if (uirt->in[i] == 0xff) {
+ ir_raw_event_store(uirt->rc, &((struct ir_raw_event) {
+ .duration = IR_TIMEOUT,
+ .timeout = true,
+ }));
+ uirt->rx_state = RX_STATE_INTERSPACE_HIGH;
+ } else {
+ uirt->high = uirt->in[i];
+ uirt->rx_state = RX_STATE_OFF_LOW;
+ }
+ break;
+ case RX_STATE_OFF_LOW:
+ // duration is in 400ns units
+ duration = (uirt->high << 8) | uirt->in[i];
+ ir_raw_event_store(uirt->rc, &((struct ir_raw_event) {
+ .duration = DIV_ROUND_CLOSEST(duration * 2, 5),
+ .pulse = false,
+ }));
+ uirt->rx_state = RX_STATE_ON_HIGH;
+ break;
+ }
+ }
+
+ ir_raw_event_handle(uirt->rc);
+}
+
+static void uirt_response(struct uirt *uirt, u32 len)
+{
+ int i;
+
+ dev_dbg(uirt->dev, "state:%d data: %*phN\n", uirt->cmd_state, len, uirt->in);
+
+ // Do we have more IR to transmit
+ if (uirt->cmd_state == CMD_STATE_STREAMING_TX && len >= 2 &&
+ uirt->tx_len && uirt->in[0] & FTDI_RS0_CTS) {
+ u32 len;
+ int err;
+
+ len = min_t(u32, uirt->tx_len, MAX_PACKET);
+
+ memcpy(uirt->out, uirt->tx_buf, len);
+ uirt->urb_out->transfer_buffer_length = len;
+
+ uirt->tx_len -= len;
+ uirt->tx_buf += len;
+
+ err = usb_submit_urb(uirt->urb_out, GFP_ATOMIC);
+ if (err != 0)
+ dev_warn(uirt->dev,
+ "failed to submit out urb: %d\n", err);
+ }
+
+ // if we only have two bytes, it just gives us the serial line status
+ if (len <= 2)
+ return;
+
+ switch (uirt->cmd_state) {
+ case CMD_STATE_GET_VERSION:
+ if (len == 10) {
+ // check checksum
+ u8 checksum = 0;
+
+ for (i = 2; i < len; i++)
+ checksum += uirt->in[i];
+
+ if (checksum != 0) {
+ dev_err(uirt->dev, "checksum does not match: %*phN\n",
+ len, uirt->in);
+ return;
+ }
+
+ dev_info(uirt->dev,
+ "USB-UIRT firmware v%u.%u protocol v%u.%u %02u-%02u-%04u",
+ uirt->in[2], uirt->in[3], uirt->in[4],
+ uirt->in[5], uirt->in[6], uirt->in[7],
+ 2000 + uirt->in[8]);
+
+ complete(&uirt->cmd_done);
+ return;
+ }
+ break;
+ case CMD_STATE_SHORT_TX:
+ case CMD_STATE_STREAMING_TX:
+ case CMD_STATE_SET_MODE_RAW:
+ case CMD_STATE_SET_MODE_WIDEBAND:
+ if (len == 3) {
+ switch (uirt->in[2]) {
+ case 0x20:
+ // 0x20 transmitting is expected during tx
+ if (uirt->cmd_state == CMD_STATE_STREAMING_TX)
+ return;
+
+ if (uirt->cmd_state == CMD_STATE_SHORT_TX)
+ complete(&uirt->cmd_done);
+ else
+ dev_err(uirt->dev, "device transmitting");
+ break;
+ case 0x21:
+ if (uirt->tx_len) {
+ dev_err(uirt->dev, "tx completed with %u left to send",
+ uirt->tx_len);
+ } else {
+ if (uirt->cmd_state == CMD_STATE_SET_MODE_RAW)
+ uirt->wideband = false;
+ if (uirt->cmd_state == CMD_STATE_SET_MODE_WIDEBAND)
+ uirt->wideband = true;
+
+ complete(&uirt->cmd_done);
+ }
+ break;
+ case 0x80:
+ dev_err(uirt->dev, "checksum error");
+ break;
+ case 0x81:
+ dev_err(uirt->dev, "timeout");
+ break;
+ case 0x82:
+ dev_err(uirt->dev, "command error");
+ break;
+ default:
+ dev_err(uirt->dev, "unknown response");
+ }
+
+ uirt->cmd_state = CMD_STATE_IRDATA;
+ return;
+ }
+ default:
+ break;
+ }
+
+ if (uirt->wideband)
+ uirt_wideband(uirt, len);
+ else
+ uirt_raw_mode(uirt, len);
+}
+
+static void uirt_out_callback(struct urb *urb)
+{
+ struct uirt *uirt = urb->context;
+
+ if (urb->status)
+ dev_warn(uirt->dev, "out urb status: %d\n", urb->status);
+}
+
+static void uirt_in_callback(struct urb *urb)
+{
+ struct uirt *uirt = urb->context;
+ int ret;
+
+ if (urb->status == 0)
+ uirt_response(uirt, urb->actual_length);
+ else
+ dev_dbg(uirt->dev, "in urb status: %d\n", urb->status);
+
+ ret = usb_submit_urb(urb, GFP_ATOMIC);
+ if (ret && ret != -ENODEV)
+ dev_warn(uirt->dev, "failed to resubmit urb: %d\n", ret);
+}
+
+static int uirt_command(struct uirt *uirt, const u8 *cmd, int cmd_len,
+ enum cmd_state state)
+{
+ int err;
+
+ init_completion(&uirt->cmd_done);
+
+ uirt->cmd_state = state;
+
+ memcpy(uirt->out, cmd, cmd_len);
+ uirt->urb_out->transfer_buffer_length = cmd_len;
+
+ err = usb_submit_urb(uirt->urb_out, GFP_KERNEL);
+ if (err != 0) {
+ uirt->cmd_state = CMD_STATE_IRDATA;
+ return err;
+ }
+
+ if (!wait_for_completion_timeout(&uirt->cmd_done,
+ msecs_to_jiffies(WDR_SHORT_TIMEOUT))) {
+ usb_kill_urb(uirt->urb_out);
+ uirt->cmd_state = CMD_STATE_IRDATA;
+ return -ETIMEDOUT;
+ }
+
+ return 0;
+}
+
+static int uirt_setup(struct uirt *uirt)
+{
+ int err;
+
+ err = uirt_command(uirt, CMD_SETMODERAW, sizeof(CMD_SETMODERAW),
+ CMD_STATE_SET_MODE_RAW);
+ if (err) {
+ dev_err(uirt->dev, "could not send set mode raw command: %d\n",
+ err);
+ return err;
+ }
+
+ err = uirt_command(uirt, CMD_GET_VERSION,
+ sizeof(CMD_GET_VERSION), CMD_STATE_GET_VERSION);
+ if (err != 0) {
+ dev_err(uirt->dev, "could not send get version command: %d\n",
+ err);
+ return err;
+ }
+
+ return 0;
+}
+
+// IR TX when the data can fit into a single packet (i.e 64 bytes).
+// count must be no larger than 24, else we might overflow the buffer.
+static int uirt_short_tx(struct rc_dev *rc, uint *txbuf, uint count)
+{
+ struct uirt *uirt = rc->priv;
+ u8 *out, checksum;
+ u32 i, dest, width, freq;
+ int err;
+
+ out = kzalloc(MAX_PACKET, GFP_KERNEL);
+ if (!out)
+ return -ENOMEM;
+
+ out[0] = 0x36; // DOTXRAW
+ out[2] = uirt->freq; // carrier frequency
+ out[3] = 1; // number of repeats
+
+ dest = 7;
+
+ freq = uirt->freq & 0x7f;
+
+ for (i = 0; i < count; i++) {
+ // width = (us / freq) * 2.5
+ width = DIV_ROUND_CLOSEST(txbuf[i] * 5, freq * 2);
+
+ if (width == 0)
+ width = 1;
+ else if (width > 127)
+ out[dest++] = (width >> 8) | 0x80;
+
+ out[dest++] = width;
+ }
+
+ // length of RAWSTRUCT + 1
+ out[1] = dest - 1;
+ // number of bytes in encoded pulse/space
+ out[6] = dest - 7;
+
+ // checksum
+ for (i = 0, checksum = 0; i < dest; i++)
+ checksum -= out[i];
+
+ out[dest++] = checksum;
+
+ uirt->tx_buf = NULL;
+ uirt->tx_len = 0;
+
+ err = uirt_command(uirt, out, dest, CMD_STATE_SHORT_TX);
+ kfree(out);
+ if (err != 0)
+ return err;
+
+ return count;
+}
+
+static int uirt_tx(struct rc_dev *rc, uint *txbuf, uint count)
+{
+ struct uirt *uirt = rc->priv;
+ u8 *out;
+ u32 i, dest, unit_raw, freq, len;
+ int err;
+
+ // streaming tx does not work for short IR; use non-streaming
+ // tx for short IR
+ if (count <= 24)
+ return uirt_short_tx(rc, txbuf, count);
+
+ out = kmalloc(count * 2 + 3, GFP_KERNEL);
+ if (!out)
+ return -ENOMEM;
+
+ out[0] = 0x25; // Streaming Transmit
+ out[1] = 0xdb; // checksum
+ out[2] = uirt->freq; // carrier frequency
+
+ dest = 3;
+
+ freq = uirt->freq & 0x7f;
+
+ for (i = 0; i < count; i++) {
+ // width = (us / freq) * 2.5
+ unit_raw = DIV_ROUND_CLOSEST(txbuf[i] * 5, freq * 2);
+
+ if (unit_raw == 0)
+ unit_raw = 1;
+ else if (unit_raw > 127)
+ out[dest++] = (unit_raw >> 8) | 0x80;
+
+ out[dest++] = unit_raw;
+ }
+
+ len = min_t(u32, dest, MAX_PACKET);
+
+ uirt->tx_buf = out + len;
+ uirt->tx_len = dest - len;
+
+ err = uirt_command(uirt, out, len, CMD_STATE_STREAMING_TX);
+ kfree(out);
+ if (err != 0)
+ return err;
+
+ return count;
+}
+
+static int uirt_set_tx_carrier(struct rc_dev *dev, uint32_t carrier)
+{
+ struct uirt *uirt = dev->priv;
+
+ if (carrier == 0)
+ uirt->freq = 0xc0;
+ else if (carrier >= 20000 && carrier <= 500000)
+ uirt->freq = 2500000 / carrier;
+ else
+ return -EINVAL;
+
+ return 0;
+}
+
+static int uirt_set_rx_wideband(struct rc_dev *dev, int enable)
+{
+ struct uirt *uirt = dev->priv;
+ int err;
+
+ if (enable)
+ err = uirt_command(uirt, CMD_SETWIDEBAND,
+ sizeof(CMD_SETWIDEBAND),
+ CMD_STATE_SET_MODE_WIDEBAND);
+ else
+ err = uirt_command(uirt, CMD_SETMODERAW,
+ sizeof(CMD_SETMODERAW),
+ CMD_STATE_SET_MODE_RAW);
+
+ if (err) {
+ dev_err(uirt->dev, "could not send set mode command: %d\n",
+ err);
+ return err;
+ }
+
+ return 0;
+}
+
+static int init_ftdi(struct usb_device *udev)
+{
+ int err;
+
+ // set the baud rate
+ err = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
+ FTDI_SIO_SET_BAUDRATE_REQUEST,
+ FTDI_SIO_SET_BAUDRATE_REQUEST_TYPE,
+ 0x4009, 0x0001,
+ NULL, 0, WDR_SHORT_TIMEOUT);
+ if (err)
+ return err;
+
+ // enabling rts/cts flow control
+ err = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
+ FTDI_SIO_SET_FLOW_CTRL_REQUEST,
+ FTDI_SIO_SET_FLOW_CTRL_REQUEST_TYPE,
+ 0, FTDI_SIO_RTS_CTS_HS,
+ NULL, 0, WDR_SHORT_TIMEOUT);
+ if (err)
+ return err;
+
+ // Set latency in milliseconds. The USB-UIRT will generate a
+ // urb every latency milliseconds (IR or not), so this should be
+ // set as high as possible.
+ //
+ // The USB-UIRT has a IR timeout of 14ms (i.e. it sends the 0xff
+ // byte after 14ms of IR silence. So if we set the timeout to a higher
+ // value, the 0xff just gets sent in a separate packet, and there
+ // is a small delay for the IR to be processed.
+ return usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
+ FTDI_SIO_SET_LATENCY_TIMER_REQUEST,
+ FTDI_SIO_SET_LATENCY_TIMER_REQUEST_TYPE,
+ 50, 0,
+ NULL, 0, WDR_TIMEOUT);
+}
+
+static int uirt_probe(struct usb_interface *intf,
+ const struct usb_device_id *id)
+{
+ struct usb_host_interface *idesc = intf->cur_altsetting;
+ struct usb_device *usbdev = interface_to_usbdev(intf);
+ struct usb_endpoint_descriptor *ep_in = NULL;
+ struct usb_endpoint_descriptor *ep_out = NULL;
+ struct usb_endpoint_descriptor *ep = NULL;
+ struct uirt *uirt;
+ struct rc_dev *rc;
+ struct urb *urb;
+ int i, pipe, err = -ENOMEM;
+
+ for (i = 0; i < idesc->desc.bNumEndpoints; i++) {
+ ep = &idesc->endpoint[i].desc;
+
+ if (!ep_in && usb_endpoint_is_bulk_in(ep) &&
+ usb_endpoint_maxp(ep) == MAX_PACKET)
+ ep_in = ep;
+
+ if (!ep_out && usb_endpoint_is_bulk_out(ep) &&
+ usb_endpoint_maxp(ep) == MAX_PACKET)
+ ep_out = ep;
+ }
+
+ if (!ep_in || !ep_out) {
+ dev_err(&intf->dev, "required endpoints not found\n");
+ return -ENODEV;
+ }
+
+ uirt = kzalloc(sizeof(*uirt), GFP_KERNEL);
+ if (!uirt)
+ return -ENOMEM;
+
+ uirt->in = kmalloc(MAX_PACKET, GFP_KERNEL);
+ if (!uirt->in)
+ goto free_uirt;
+
+ uirt->out = kmalloc(MAX_PACKET, GFP_KERNEL);
+ if (!uirt->out)
+ goto free_uirt;
+
+ rc = rc_allocate_device(RC_DRIVER_IR_RAW);
+ if (!rc)
+ goto free_uirt;
+
+ urb = usb_alloc_urb(0, GFP_KERNEL);
+ if (!urb)
+ goto free_rcdev;
+
+ pipe = usb_rcvbulkpipe(usbdev, ep_in->bEndpointAddress);
+ usb_fill_bulk_urb(urb, usbdev, pipe, uirt->in, MAX_PACKET,
+ uirt_in_callback, uirt);
+ uirt->urb_in = urb;
+
+ urb = usb_alloc_urb(0, GFP_KERNEL);
+ if (!urb)
+ goto free_rcdev;
+
+ pipe = usb_sndbulkpipe(usbdev, ep_out->bEndpointAddress);
+ usb_fill_bulk_urb(urb, usbdev, pipe, uirt->out, MAX_PACKET,
+ uirt_out_callback, uirt);
+
+ uirt->dev = &intf->dev;
+ uirt->usbdev = usbdev;
+ uirt->rc = rc;
+ uirt->urb_out = urb;
+ uirt->rx_state = RX_STATE_INTERSPACE_HIGH;
+
+ err = usb_submit_urb(uirt->urb_in, GFP_KERNEL);
+ if (err != 0) {
+ dev_err(uirt->dev, "failed to submit read urb: %d\n", err);
+ return err;
+ }
+
+ err = init_ftdi(usbdev);
+ if (err) {
+ dev_err(uirt->dev, "failed to setup ftdi: %d\n", err);
+ return err;
+ }
+
+ err = uirt_setup(uirt);
+ if (err)
+ goto free_rcdev;
+
+ usb_make_path(usbdev, uirt->phys, sizeof(uirt->phys));
+
+ rc->device_name = "USB-UIRT";
+ rc->driver_name = KBUILD_MODNAME;
+ rc->input_phys = uirt->phys;
+ usb_to_input_id(usbdev, &rc->input_id);
+ rc->dev.parent = &intf->dev;
+ rc->priv = uirt;
+ rc->tx_ir = uirt_tx;
+ rc->s_tx_carrier = uirt_set_tx_carrier;
+ rc->s_learning_mode = uirt_set_rx_wideband;
+ rc->allowed_protocols = RC_PROTO_BIT_ALL_IR_DECODER;
+ rc->map_name = RC_MAP_RC6_MCE;
+ rc->rx_resolution = UNIT_US;
+ rc->timeout = IR_TIMEOUT;
+
+ uirt_set_tx_carrier(rc, 38000);
+
+ err = rc_register_device(rc);
+ if (err)
+ goto free_rcdev;
+
+ usb_set_intfdata(intf, uirt);
+
+ return 0;
+
+free_rcdev:
+ usb_kill_urb(uirt->urb_out);
+ usb_free_urb(uirt->urb_out);
+ usb_kill_urb(uirt->urb_in);
+ usb_free_urb(uirt->urb_in);
+ rc_free_device(rc);
+free_uirt:
+ kfree(uirt->in);
+ kfree(uirt->out);
+ kfree(uirt);
+ return err;
+}
+
+static void uirt_disconnect(struct usb_interface *intf)
+{
+ struct uirt *ir = usb_get_intfdata(intf);
+
+ rc_unregister_device(ir->rc);
+ usb_set_intfdata(intf, NULL);
+ usb_kill_urb(ir->urb_out);
+ usb_free_urb(ir->urb_out);
+ usb_kill_urb(ir->urb_in);
+ usb_free_urb(ir->urb_in);
+ kfree(ir->in);
+ kfree(ir->out);
+ kfree(ir);
+}
+
+static const struct usb_device_id uirt_table[] = {
+ { USB_DEVICE(0x0403, 0xf850) },
+ { }
+};
+
+static struct usb_driver uirt_driver = {
+ .name = KBUILD_MODNAME,
+ .probe = uirt_probe,
+ .disconnect = uirt_disconnect,
+ .id_table = uirt_table,
+};
+
+module_usb_driver(uirt_driver);
+
+MODULE_AUTHOR("Sean Young <sean@mess.org>");
+MODULE_DESCRIPTION("USB-UIRT driver");
+MODULE_LICENSE("GPL");
+MODULE_DEVICE_TABLE(usb, uirt_table);
--
2.31.1
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