From 2c3c1048746a4622d8c89a29670120dc8fab93c4 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Sun, 7 Apr 2024 20:49:45 +0200 Subject: Adding upstream version 6.1.76. Signed-off-by: Daniel Baumann --- drivers/media/rc/ir_toy.c | 560 ++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 560 insertions(+) create mode 100644 drivers/media/rc/ir_toy.c (limited to 'drivers/media/rc/ir_toy.c') diff --git a/drivers/media/rc/ir_toy.c b/drivers/media/rc/ir_toy.c new file mode 100644 index 000000000..196806709 --- /dev/null +++ b/drivers/media/rc/ir_toy.c @@ -0,0 +1,560 @@ +// SPDX-License-Identifier: GPL-2.0-or-later + +/* + * Infrared Toy and IR Droid RC core driver + * + * Copyright (C) 2020 Sean Young + * + * http://dangerousprototypes.com/docs/USB_IR_Toy:_Sampling_mode + * + * This driver is based on the lirc driver which can be found here: + * https://sourceforge.net/p/lirc/git/ci/master/tree/plugins/irtoy.c + * Copyright (C) 2011 Peter Kooiman + */ + +#include +#include +#include +#include +#include +#include +#include + +#include + +static const u8 COMMAND_VERSION[] = { 'v' }; +// End transmit and repeat reset command so we exit sump mode +static const u8 COMMAND_RESET[] = { 0xff, 0xff, 0, 0, 0, 0, 0 }; +static const u8 COMMAND_SMODE_ENTER[] = { 's' }; +static const u8 COMMAND_SMODE_EXIT[] = { 0 }; +static const u8 COMMAND_TXSTART[] = { 0x26, 0x24, 0x25, 0x03 }; + +#define REPLY_XMITCOUNT 't' +#define REPLY_XMITSUCCESS 'C' +#define REPLY_VERSION 'V' +#define REPLY_SAMPLEMODEPROTO 'S' + +#define TIMEOUT 500 + +#define LEN_XMITRES 3 +#define LEN_VERSION 4 +#define LEN_SAMPLEMODEPROTO 3 + +#define MIN_FW_VERSION 20 +#define UNIT_US 21 +#define MAX_TIMEOUT_US (UNIT_US * U16_MAX) + +#define MAX_PACKET 64 + +enum state { + STATE_IRDATA, + STATE_COMMAND_NO_RESP, + STATE_COMMAND, + STATE_TX, +}; + +struct irtoy { + struct device *dev; + struct usb_device *usbdev; + + struct rc_dev *rc; + struct urb *urb_in, *urb_out; + + u8 *in; + u8 *out; + struct completion command_done; + + bool pulse; + enum state state; + + void *tx_buf; + uint tx_len; + + uint emitted; + uint hw_version; + uint sw_version; + uint proto_version; + + char phys[64]; +}; + +static void irtoy_response(struct irtoy *irtoy, u32 len) +{ + switch (irtoy->state) { + case STATE_COMMAND: + if (len == LEN_VERSION && irtoy->in[0] == REPLY_VERSION) { + uint version; + + irtoy->in[LEN_VERSION] = 0; + + if (kstrtouint(irtoy->in + 1, 10, &version)) { + dev_err(irtoy->dev, "invalid version %*phN. Please make sure you are using firmware v20 or higher", + LEN_VERSION, irtoy->in); + break; + } + + dev_dbg(irtoy->dev, "version %s\n", irtoy->in); + + irtoy->hw_version = version / 100; + irtoy->sw_version = version % 100; + + irtoy->state = STATE_IRDATA; + complete(&irtoy->command_done); + } else if (len == LEN_SAMPLEMODEPROTO && + irtoy->in[0] == REPLY_SAMPLEMODEPROTO) { + uint version; + + irtoy->in[LEN_SAMPLEMODEPROTO] = 0; + + if (kstrtouint(irtoy->in + 1, 10, &version)) { + dev_err(irtoy->dev, "invalid sample mode response %*phN", + LEN_SAMPLEMODEPROTO, irtoy->in); + return; + } + + dev_dbg(irtoy->dev, "protocol %s\n", irtoy->in); + + irtoy->proto_version = version; + + irtoy->state = STATE_IRDATA; + complete(&irtoy->command_done); + } else { + dev_err(irtoy->dev, "unexpected response to command: %*phN\n", + len, irtoy->in); + } + break; + case STATE_COMMAND_NO_RESP: + case STATE_IRDATA: { + struct ir_raw_event rawir = { .pulse = irtoy->pulse }; + __be16 *in = (__be16 *)irtoy->in; + int i; + + for (i = 0; i < len / sizeof(__be16); i++) { + u16 v = be16_to_cpu(in[i]); + + if (v == 0xffff) { + rawir.pulse = false; + } else { + rawir.duration = v * UNIT_US; + ir_raw_event_store_with_timeout(irtoy->rc, + &rawir); + } + + rawir.pulse = !rawir.pulse; + } + + irtoy->pulse = rawir.pulse; + + ir_raw_event_handle(irtoy->rc); + break; + } + case STATE_TX: + if (irtoy->tx_len == 0) { + if (len == LEN_XMITRES && + irtoy->in[0] == REPLY_XMITCOUNT) { + u16 emitted = get_unaligned_be16(irtoy->in + 1); + + dev_dbg(irtoy->dev, "emitted:%u\n", emitted); + + irtoy->emitted = emitted; + } else if (len == 1 && + irtoy->in[0] == REPLY_XMITSUCCESS) { + irtoy->state = STATE_IRDATA; + complete(&irtoy->command_done); + } + } else { + // send next part of tx buffer + uint space = irtoy->in[0]; + uint buf_len; + int err; + + if (len != 1 || space > MAX_PACKET || space == 0) { + dev_dbg(irtoy->dev, "packet length expected: %*phN\n", + len, irtoy->in); + break; + } + + buf_len = min(space, irtoy->tx_len); + + dev_dbg(irtoy->dev, "remaining:%u sending:%u\n", + irtoy->tx_len, buf_len); + + memcpy(irtoy->out, irtoy->tx_buf, buf_len); + irtoy->urb_out->transfer_buffer_length = buf_len; + err = usb_submit_urb(irtoy->urb_out, GFP_ATOMIC); + if (err != 0) { + dev_err(irtoy->dev, "fail to submit tx buf urb: %d\n", + err); + irtoy->state = STATE_IRDATA; + complete(&irtoy->command_done); + break; + } + + irtoy->tx_buf += buf_len; + irtoy->tx_len -= buf_len; + } + break; + } +} + +static void irtoy_out_callback(struct urb *urb) +{ + struct irtoy *irtoy = urb->context; + + if (urb->status == 0) { + if (irtoy->state == STATE_COMMAND_NO_RESP) + complete(&irtoy->command_done); + } else { + dev_warn(irtoy->dev, "out urb status: %d\n", urb->status); + } +} + +static void irtoy_in_callback(struct urb *urb) +{ + struct irtoy *irtoy = urb->context; + int ret; + + switch (urb->status) { + case 0: + irtoy_response(irtoy, urb->actual_length); + break; + case -ECONNRESET: + case -ENOENT: + case -ESHUTDOWN: + case -EPROTO: + case -EPIPE: + usb_unlink_urb(urb); + return; + default: + dev_dbg(irtoy->dev, "in urb status: %d\n", urb->status); + } + + ret = usb_submit_urb(urb, GFP_ATOMIC); + if (ret && ret != -ENODEV) + dev_warn(irtoy->dev, "failed to resubmit urb: %d\n", ret); +} + +static int irtoy_command(struct irtoy *irtoy, const u8 *cmd, int cmd_len, + enum state state) +{ + int err; + + init_completion(&irtoy->command_done); + + irtoy->state = state; + + memcpy(irtoy->out, cmd, cmd_len); + irtoy->urb_out->transfer_buffer_length = cmd_len; + + err = usb_submit_urb(irtoy->urb_out, GFP_KERNEL); + if (err != 0) + return err; + + if (!wait_for_completion_timeout(&irtoy->command_done, + msecs_to_jiffies(TIMEOUT))) { + usb_kill_urb(irtoy->urb_out); + return -ETIMEDOUT; + } + + return 0; +} + +static int irtoy_setup(struct irtoy *irtoy) +{ + int err; + + err = irtoy_command(irtoy, COMMAND_RESET, sizeof(COMMAND_RESET), + STATE_COMMAND_NO_RESP); + if (err != 0) { + dev_err(irtoy->dev, "could not write reset command: %d\n", + err); + return err; + } + + usleep_range(50, 50); + + // get version + err = irtoy_command(irtoy, COMMAND_VERSION, sizeof(COMMAND_VERSION), + STATE_COMMAND); + if (err) { + dev_err(irtoy->dev, "could not write version command: %d\n", + err); + return err; + } + + // enter sample mode + err = irtoy_command(irtoy, COMMAND_SMODE_ENTER, + sizeof(COMMAND_SMODE_ENTER), STATE_COMMAND); + if (err) + dev_err(irtoy->dev, "could not write sample command: %d\n", + err); + + return err; +} + +/* + * When sending IR, it is imperative that we send the IR data as quickly + * as possible to the device, so it does not run out of IR data and + * introduce gaps. Allocate the buffer here, and then feed the data from + * the urb callback handler. + */ +static int irtoy_tx(struct rc_dev *rc, uint *txbuf, uint count) +{ + struct irtoy *irtoy = rc->priv; + unsigned int i, size; + __be16 *buf; + int err; + + size = sizeof(u16) * (count + 1); + buf = kmalloc(size, GFP_KERNEL); + if (!buf) + return -ENOMEM; + + for (i = 0; i < count; i++) { + u16 v = DIV_ROUND_CLOSEST(txbuf[i], UNIT_US); + + if (!v) + v = 1; + buf[i] = cpu_to_be16(v); + } + + buf[count] = cpu_to_be16(0xffff); + + irtoy->tx_buf = buf; + irtoy->tx_len = size; + irtoy->emitted = 0; + + // There is an issue where if the unit is receiving IR while the + // first TXSTART command is sent, the device might end up hanging + // with its led on. It does not respond to any command when this + // happens. To work around this, re-enter sample mode. + err = irtoy_command(irtoy, COMMAND_SMODE_EXIT, + sizeof(COMMAND_SMODE_EXIT), STATE_COMMAND_NO_RESP); + if (err) { + dev_err(irtoy->dev, "exit sample mode: %d\n", err); + return err; + } + + err = irtoy_command(irtoy, COMMAND_SMODE_ENTER, + sizeof(COMMAND_SMODE_ENTER), STATE_COMMAND); + if (err) { + dev_err(irtoy->dev, "enter sample mode: %d\n", err); + return err; + } + + err = irtoy_command(irtoy, COMMAND_TXSTART, sizeof(COMMAND_TXSTART), + STATE_TX); + kfree(buf); + + if (err) { + dev_err(irtoy->dev, "failed to send tx start command: %d\n", + err); + // not sure what state the device is in, reset it + irtoy_setup(irtoy); + return err; + } + + if (size != irtoy->emitted) { + dev_err(irtoy->dev, "expected %u emitted, got %u\n", size, + irtoy->emitted); + // not sure what state the device is in, reset it + irtoy_setup(irtoy); + return -EINVAL; + } + + return count; +} + +static int irtoy_tx_carrier(struct rc_dev *rc, uint32_t carrier) +{ + struct irtoy *irtoy = rc->priv; + u8 buf[3]; + int err; + + if (carrier < 11800) + return -EINVAL; + + buf[0] = 0x06; + buf[1] = DIV_ROUND_CLOSEST(48000000, 16 * carrier) - 1; + buf[2] = 0; + + err = irtoy_command(irtoy, buf, sizeof(buf), STATE_COMMAND_NO_RESP); + if (err) + dev_err(irtoy->dev, "could not write carrier command: %d\n", + err); + + return err; +} + +static int irtoy_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 irtoy *irtoy; + 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; + } + + irtoy = kzalloc(sizeof(*irtoy), GFP_KERNEL); + if (!irtoy) + return -ENOMEM; + + irtoy->in = kmalloc(MAX_PACKET, GFP_KERNEL); + if (!irtoy->in) + goto free_irtoy; + + irtoy->out = kmalloc(MAX_PACKET, GFP_KERNEL); + if (!irtoy->out) + goto free_irtoy; + + rc = rc_allocate_device(RC_DRIVER_IR_RAW); + if (!rc) + goto free_irtoy; + + 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, irtoy->in, MAX_PACKET, + irtoy_in_callback, irtoy); + irtoy->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, irtoy->out, MAX_PACKET, + irtoy_out_callback, irtoy); + + irtoy->dev = &intf->dev; + irtoy->usbdev = usbdev; + irtoy->rc = rc; + irtoy->urb_out = urb; + irtoy->pulse = true; + + err = usb_submit_urb(irtoy->urb_in, GFP_KERNEL); + if (err != 0) { + dev_err(irtoy->dev, "fail to submit in urb: %d\n", err); + goto free_rcdev; + } + + err = irtoy_setup(irtoy); + if (err) + goto free_rcdev; + + dev_info(irtoy->dev, "version: hardware %u, firmware %u.%u, protocol %u", + irtoy->hw_version, irtoy->sw_version / 10, + irtoy->sw_version % 10, irtoy->proto_version); + + if (irtoy->sw_version < MIN_FW_VERSION) { + dev_err(irtoy->dev, "need firmware V%02u or higher", + MIN_FW_VERSION); + err = -ENODEV; + goto free_rcdev; + } + + usb_make_path(usbdev, irtoy->phys, sizeof(irtoy->phys)); + + rc->device_name = "Infrared Toy"; + rc->driver_name = KBUILD_MODNAME; + rc->input_phys = irtoy->phys; + usb_to_input_id(usbdev, &rc->input_id); + rc->dev.parent = &intf->dev; + rc->priv = irtoy; + rc->tx_ir = irtoy_tx; + rc->s_tx_carrier = irtoy_tx_carrier; + rc->allowed_protocols = RC_PROTO_BIT_ALL_IR_DECODER; + rc->map_name = RC_MAP_RC6_MCE; + rc->rx_resolution = UNIT_US; + rc->timeout = IR_DEFAULT_TIMEOUT; + + /* + * end of transmission is detected by absence of a usb packet + * with more pulse/spaces. However, each usb packet sent can + * contain 32 pulse/spaces, which can be quite lengthy, so there + * can be a delay between usb packets. For example with nec there is a + * 17ms gap between packets. + * + * So, make timeout a largish minimum which works with most protocols. + */ + rc->min_timeout = MS_TO_US(40); + rc->max_timeout = MAX_TIMEOUT_US; + + err = rc_register_device(rc); + if (err) + goto free_rcdev; + + usb_set_intfdata(intf, irtoy); + + return 0; + +free_rcdev: + usb_kill_urb(irtoy->urb_out); + usb_free_urb(irtoy->urb_out); + usb_kill_urb(irtoy->urb_in); + usb_free_urb(irtoy->urb_in); + rc_free_device(rc); +free_irtoy: + kfree(irtoy->in); + kfree(irtoy->out); + kfree(irtoy); + return err; +} + +static void irtoy_disconnect(struct usb_interface *intf) +{ + struct irtoy *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 irtoy_table[] = { + { USB_DEVICE_INTERFACE_CLASS(0x04d8, 0xfd08, USB_CLASS_CDC_DATA) }, + { USB_DEVICE_INTERFACE_CLASS(0x04d8, 0xf58b, USB_CLASS_CDC_DATA) }, + { } +}; + +static struct usb_driver irtoy_driver = { + .name = KBUILD_MODNAME, + .probe = irtoy_probe, + .disconnect = irtoy_disconnect, + .id_table = irtoy_table, +}; + +module_usb_driver(irtoy_driver); + +MODULE_AUTHOR("Sean Young "); +MODULE_DESCRIPTION("Infrared Toy and IR Droid driver"); +MODULE_LICENSE("GPL"); +MODULE_DEVICE_TABLE(usb, irtoy_table); -- cgit v1.2.3