media: rc: new driver for early iMon device

These devices were supported by the lirc_imon.c driver which was removed
from staging in commit f41003a23a ("[media] staging: lirc_imon: port
remaining usb ids to imon and remove").

Signed-off-by: Sean Young <sean@mess.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
This commit is contained in:
Sean Young 2018-01-05 14:58:51 -05:00 committed by Mauro Carvalho Chehab
parent 572eca036d
commit 8a4e8f8dfc
4 changed files with 219 additions and 0 deletions

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@ -6903,6 +6903,13 @@ M: James Hogan <jhogan@kernel.org>
S: Maintained
F: drivers/media/rc/img-ir/
IMON SOUNDGRAPH USB IR RECEIVER
M: Sean Young <sean@mess.org>
L: linux-media@vger.kernel.org
S: Maintained
F: drivers/media/rc/imon_raw.c
F: drivers/media/rc/imon.c
IMS TWINTURBO FRAMEBUFFER DRIVER
L: linux-fbdev@vger.kernel.org
S: Orphan

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@ -175,6 +175,18 @@ config IR_IMON
To compile this driver as a module, choose M here: the
module will be called imon.
config IR_IMON_RAW
tristate "SoundGraph iMON Receiver (early raw IR models)"
depends on USB_ARCH_HAS_HCD
depends on RC_CORE
select USB
---help---
Say Y here if you want to use a SoundGraph iMON IR Receiver,
early raw models.
To compile this driver as a module, choose M here: the
module will be called imon_raw.
config IR_MCEUSB
tristate "Windows Media Center Ed. eHome Infrared Transceiver"
depends on USB_ARCH_HAS_HCD

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@ -19,6 +19,7 @@ obj-$(CONFIG_IR_XMP_DECODER) += ir-xmp-decoder.o
obj-$(CONFIG_RC_ATI_REMOTE) += ati_remote.o
obj-$(CONFIG_IR_HIX5HD2) += ir-hix5hd2.o
obj-$(CONFIG_IR_IMON) += imon.o
obj-$(CONFIG_IR_IMON_RAW) += imon_raw.o
obj-$(CONFIG_IR_ITE_CIR) += ite-cir.o
obj-$(CONFIG_IR_MCEUSB) += mceusb.o
obj-$(CONFIG_IR_FINTEK) += fintek-cir.o

199
drivers/media/rc/imon_raw.c Normal file
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@ -0,0 +1,199 @@
// SPDX-License-Identifier: GPL-2.0+
//
// Copyright (C) 2018 Sean Young <sean@mess.org>
#include <linux/module.h>
#include <linux/usb.h>
#include <linux/usb/input.h>
#include <media/rc-core.h>
/* Each bit is 250us */
#define BIT_DURATION 250000
struct imon {
struct device *dev;
struct urb *ir_urb;
struct rc_dev *rcdev;
u8 ir_buf[8];
char phys[64];
};
/*
* ffs/find_next_bit() searches in the wrong direction, so open-code our own.
*/
static inline int is_bit_set(const u8 *buf, int bit)
{
return buf[bit / 8] & (0x80 >> (bit & 7));
}
static void imon_ir_data(struct imon *imon)
{
DEFINE_IR_RAW_EVENT(rawir);
int offset = 0, size = 5 * 8;
int bit;
dev_dbg(imon->dev, "data: %*ph", 8, imon->ir_buf);
while (offset < size) {
bit = offset;
while (!is_bit_set(imon->ir_buf, bit) && bit < size)
bit++;
dev_dbg(imon->dev, "pulse: %d bits", bit - offset);
if (bit > offset) {
rawir.pulse = true;
rawir.duration = (bit - offset) * BIT_DURATION;
ir_raw_event_store_with_filter(imon->rcdev, &rawir);
}
if (bit >= size)
break;
offset = bit;
while (is_bit_set(imon->ir_buf, bit) && bit < size)
bit++;
dev_dbg(imon->dev, "space: %d bits", bit - offset);
rawir.pulse = false;
rawir.duration = (bit - offset) * BIT_DURATION;
ir_raw_event_store_with_filter(imon->rcdev, &rawir);
offset = bit;
}
if (imon->ir_buf[7] == 0x0a) {
ir_raw_event_set_idle(imon->rcdev, true);
ir_raw_event_handle(imon->rcdev);
}
}
static void imon_ir_rx(struct urb *urb)
{
struct imon *imon = urb->context;
int ret;
switch (urb->status) {
case 0:
if (imon->ir_buf[7] != 0xff)
imon_ir_data(imon);
break;
case -ECONNRESET:
case -ENOENT:
case -ESHUTDOWN:
usb_unlink_urb(urb);
return;
case -EPIPE:
default:
dev_dbg(imon->dev, "error: urb status = %d", urb->status);
break;
}
ret = usb_submit_urb(urb, GFP_ATOMIC);
if (ret && ret != -ENODEV)
dev_warn(imon->dev, "failed to resubmit urb: %d", ret);
}
static int imon_probe(struct usb_interface *intf,
const struct usb_device_id *id)
{
struct usb_endpoint_descriptor *ir_ep = NULL;
struct usb_host_interface *idesc;
struct usb_device *udev;
struct rc_dev *rcdev;
struct imon *imon;
int i, ret;
udev = interface_to_usbdev(intf);
idesc = intf->cur_altsetting;
for (i = 0; i < idesc->desc.bNumEndpoints; i++) {
struct usb_endpoint_descriptor *ep = &idesc->endpoint[i].desc;
if (usb_endpoint_is_int_in(ep)) {
ir_ep = ep;
break;
}
}
if (!ir_ep) {
dev_err(&intf->dev, "IR endpoint missing");
return -ENODEV;
}
imon = devm_kmalloc(&intf->dev, sizeof(*imon), GFP_KERNEL);
if (!imon)
return -ENOMEM;
imon->ir_urb = usb_alloc_urb(0, GFP_KERNEL);
if (!imon->ir_urb)
return -ENOMEM;
imon->dev = &intf->dev;
usb_fill_int_urb(imon->ir_urb, udev,
usb_rcvintpipe(udev, ir_ep->bEndpointAddress),
imon->ir_buf, sizeof(imon->ir_buf),
imon_ir_rx, imon, ir_ep->bInterval);
rcdev = devm_rc_allocate_device(&intf->dev, RC_DRIVER_IR_RAW);
if (!rcdev) {
ret = -ENOMEM;
goto free_urb;
}
usb_make_path(udev, imon->phys, sizeof(imon->phys));
rcdev->device_name = "iMON Station";
rcdev->driver_name = KBUILD_MODNAME;
rcdev->input_phys = imon->phys;
usb_to_input_id(udev, &rcdev->input_id);
rcdev->dev.parent = &intf->dev;
rcdev->allowed_protocols = RC_PROTO_BIT_ALL_IR_DECODER;
rcdev->map_name = RC_MAP_IMON_RSC;
rcdev->rx_resolution = BIT_DURATION;
rcdev->priv = imon;
ret = devm_rc_register_device(&intf->dev, rcdev);
if (ret)
goto free_urb;
imon->rcdev = rcdev;
ret = usb_submit_urb(imon->ir_urb, GFP_KERNEL);
if (ret)
goto free_urb;
usb_set_intfdata(intf, imon);
return 0;
free_urb:
usb_free_urb(imon->ir_urb);
return ret;
}
static void imon_disconnect(struct usb_interface *intf)
{
struct imon *imon = usb_get_intfdata(intf);
usb_kill_urb(imon->ir_urb);
usb_free_urb(imon->ir_urb);
}
static const struct usb_device_id imon_table[] = {
/* SoundGraph iMON (IR only) -- sg_imon.inf */
{ USB_DEVICE(0x04e8, 0xff30) },
{}
};
static struct usb_driver imon_driver = {
.name = KBUILD_MODNAME,
.probe = imon_probe,
.disconnect = imon_disconnect,
.id_table = imon_table
};
module_usb_driver(imon_driver);
MODULE_DESCRIPTION("Early raw iMON IR devices");
MODULE_AUTHOR("Sean Young <sean@mess.org>");
MODULE_LICENSE("GPL");
MODULE_DEVICE_TABLE(usb, imon_table);