1c942fddfSThomas Gleixner // SPDX-License-Identifier: GPL-2.0-or-later
232cf86f6SMauro Carvalho Chehab /*
332cf86f6SMauro Carvalho Chehab * Streamzap Remote Control driver
432cf86f6SMauro Carvalho Chehab *
532cf86f6SMauro Carvalho Chehab * Copyright (c) 2005 Christoph Bartelmus <lirc@bartelmus.de>
632cf86f6SMauro Carvalho Chehab * Copyright (c) 2010 Jarod Wilson <jarod@wilsonet.com>
732cf86f6SMauro Carvalho Chehab *
832cf86f6SMauro Carvalho Chehab * This driver was based on the work of Greg Wickham and Adrian
932cf86f6SMauro Carvalho Chehab * Dewhurst. It was substantially rewritten to support correct signal
1032cf86f6SMauro Carvalho Chehab * gaps and now maintains a delay buffer, which is used to present
1132cf86f6SMauro Carvalho Chehab * consistent timing behaviour to user space applications. Without the
1232cf86f6SMauro Carvalho Chehab * delay buffer an ugly hack would be required in lircd, which can
1332cf86f6SMauro Carvalho Chehab * cause sluggish signal decoding in certain situations.
1432cf86f6SMauro Carvalho Chehab *
1532cf86f6SMauro Carvalho Chehab * Ported to in-kernel ir-core interface by Jarod Wilson
1632cf86f6SMauro Carvalho Chehab *
1732cf86f6SMauro Carvalho Chehab * This driver is based on the USB skeleton driver packaged with the
1832cf86f6SMauro Carvalho Chehab * kernel; copyright (C) 2001-2003 Greg Kroah-Hartman (greg@kroah.com)
1932cf86f6SMauro Carvalho Chehab */
2032cf86f6SMauro Carvalho Chehab
2132cf86f6SMauro Carvalho Chehab #include <linux/device.h>
2232cf86f6SMauro Carvalho Chehab #include <linux/module.h>
2332cf86f6SMauro Carvalho Chehab #include <linux/slab.h>
2432cf86f6SMauro Carvalho Chehab #include <linux/usb.h>
2532cf86f6SMauro Carvalho Chehab #include <linux/usb/input.h>
266bda9644SMauro Carvalho Chehab #include <media/rc-core.h>
2732cf86f6SMauro Carvalho Chehab
2832cf86f6SMauro Carvalho Chehab #define DRIVER_NAME "streamzap"
2932cf86f6SMauro Carvalho Chehab #define DRIVER_DESC "Streamzap Remote Control driver"
3032cf86f6SMauro Carvalho Chehab
3132cf86f6SMauro Carvalho Chehab #define USB_STREAMZAP_VENDOR_ID 0x0e9c
3232cf86f6SMauro Carvalho Chehab #define USB_STREAMZAP_PRODUCT_ID 0x0000
3332cf86f6SMauro Carvalho Chehab
3432cf86f6SMauro Carvalho Chehab /* table of devices that work with this driver */
355fad16b5SArvind Yadav static const struct usb_device_id streamzap_table[] = {
3632cf86f6SMauro Carvalho Chehab /* Streamzap Remote Control */
3732cf86f6SMauro Carvalho Chehab { USB_DEVICE(USB_STREAMZAP_VENDOR_ID, USB_STREAMZAP_PRODUCT_ID) },
3832cf86f6SMauro Carvalho Chehab /* Terminating entry */
3932cf86f6SMauro Carvalho Chehab { }
4032cf86f6SMauro Carvalho Chehab };
4132cf86f6SMauro Carvalho Chehab
4232cf86f6SMauro Carvalho Chehab MODULE_DEVICE_TABLE(usb, streamzap_table);
4332cf86f6SMauro Carvalho Chehab
4432cf86f6SMauro Carvalho Chehab #define SZ_PULSE_MASK 0xf0
4532cf86f6SMauro Carvalho Chehab #define SZ_SPACE_MASK 0x0f
4632cf86f6SMauro Carvalho Chehab #define SZ_TIMEOUT 0xff
4732cf86f6SMauro Carvalho Chehab #define SZ_RESOLUTION 256
4832cf86f6SMauro Carvalho Chehab
4932cf86f6SMauro Carvalho Chehab /* number of samples buffered */
5032cf86f6SMauro Carvalho Chehab #define SZ_BUF_LEN 128
5132cf86f6SMauro Carvalho Chehab
5232cf86f6SMauro Carvalho Chehab enum StreamzapDecoderState {
5332cf86f6SMauro Carvalho Chehab PulseSpace,
5432cf86f6SMauro Carvalho Chehab FullPulse,
5532cf86f6SMauro Carvalho Chehab FullSpace,
5632cf86f6SMauro Carvalho Chehab IgnorePulse
5732cf86f6SMauro Carvalho Chehab };
5832cf86f6SMauro Carvalho Chehab
5932cf86f6SMauro Carvalho Chehab /* structure to hold our device specific stuff */
6032cf86f6SMauro Carvalho Chehab struct streamzap_ir {
6132cf86f6SMauro Carvalho Chehab /* ir-core */
62d8b4b582SDavid Härdeman struct rc_dev *rdev;
6332cf86f6SMauro Carvalho Chehab
6432cf86f6SMauro Carvalho Chehab /* core device info */
6532cf86f6SMauro Carvalho Chehab struct device *dev;
6632cf86f6SMauro Carvalho Chehab
6732cf86f6SMauro Carvalho Chehab /* usb */
6832cf86f6SMauro Carvalho Chehab struct urb *urb_in;
6932cf86f6SMauro Carvalho Chehab
7032cf86f6SMauro Carvalho Chehab /* buffer & dma */
7132cf86f6SMauro Carvalho Chehab unsigned char *buf_in;
7232cf86f6SMauro Carvalho Chehab dma_addr_t dma_in;
7332cf86f6SMauro Carvalho Chehab unsigned int buf_in_len;
7432cf86f6SMauro Carvalho Chehab
7532cf86f6SMauro Carvalho Chehab /* track what state we're in */
7632cf86f6SMauro Carvalho Chehab enum StreamzapDecoderState decoder_state;
7732cf86f6SMauro Carvalho Chehab
7832cf86f6SMauro Carvalho Chehab char phys[64];
7932cf86f6SMauro Carvalho Chehab };
8032cf86f6SMauro Carvalho Chehab
8132cf86f6SMauro Carvalho Chehab
8232cf86f6SMauro Carvalho Chehab /* local function prototypes */
8332cf86f6SMauro Carvalho Chehab static int streamzap_probe(struct usb_interface *interface,
8432cf86f6SMauro Carvalho Chehab const struct usb_device_id *id);
8532cf86f6SMauro Carvalho Chehab static void streamzap_disconnect(struct usb_interface *interface);
8632cf86f6SMauro Carvalho Chehab static void streamzap_callback(struct urb *urb);
8732cf86f6SMauro Carvalho Chehab static int streamzap_suspend(struct usb_interface *intf, pm_message_t message);
8832cf86f6SMauro Carvalho Chehab static int streamzap_resume(struct usb_interface *intf);
8932cf86f6SMauro Carvalho Chehab
9032cf86f6SMauro Carvalho Chehab /* usb specific object needed to register this driver with the usb subsystem */
9132cf86f6SMauro Carvalho Chehab static struct usb_driver streamzap_driver = {
9232cf86f6SMauro Carvalho Chehab .name = DRIVER_NAME,
9332cf86f6SMauro Carvalho Chehab .probe = streamzap_probe,
9432cf86f6SMauro Carvalho Chehab .disconnect = streamzap_disconnect,
9532cf86f6SMauro Carvalho Chehab .suspend = streamzap_suspend,
9632cf86f6SMauro Carvalho Chehab .resume = streamzap_resume,
9732cf86f6SMauro Carvalho Chehab .id_table = streamzap_table,
9832cf86f6SMauro Carvalho Chehab };
9932cf86f6SMauro Carvalho Chehab
sz_push(struct streamzap_ir * sz,struct ir_raw_event rawir)10032cf86f6SMauro Carvalho Chehab static void sz_push(struct streamzap_ir *sz, struct ir_raw_event rawir)
10132cf86f6SMauro Carvalho Chehab {
10232cf86f6SMauro Carvalho Chehab dev_dbg(sz->dev, "Storing %s with duration %u us\n",
10332cf86f6SMauro Carvalho Chehab (rawir.pulse ? "pulse" : "space"), rawir.duration);
104d8b4b582SDavid Härdeman ir_raw_event_store_with_filter(sz->rdev, &rawir);
10532cf86f6SMauro Carvalho Chehab }
10632cf86f6SMauro Carvalho Chehab
sz_push_full_pulse(struct streamzap_ir * sz,unsigned char value)10732cf86f6SMauro Carvalho Chehab static void sz_push_full_pulse(struct streamzap_ir *sz,
10832cf86f6SMauro Carvalho Chehab unsigned char value)
10932cf86f6SMauro Carvalho Chehab {
1108b3179b7SSean Young struct ir_raw_event rawir = {
1118b3179b7SSean Young .pulse = true,
1128b3179b7SSean Young .duration = value * SZ_RESOLUTION + SZ_RESOLUTION / 2,
1138b3179b7SSean Young };
11432cf86f6SMauro Carvalho Chehab
11532cf86f6SMauro Carvalho Chehab sz_push(sz, rawir);
11632cf86f6SMauro Carvalho Chehab }
11732cf86f6SMauro Carvalho Chehab
sz_push_half_pulse(struct streamzap_ir * sz,unsigned char value)11832cf86f6SMauro Carvalho Chehab static void sz_push_half_pulse(struct streamzap_ir *sz,
11932cf86f6SMauro Carvalho Chehab unsigned char value)
12032cf86f6SMauro Carvalho Chehab {
12132cf86f6SMauro Carvalho Chehab sz_push_full_pulse(sz, (value & SZ_PULSE_MASK) >> 4);
12232cf86f6SMauro Carvalho Chehab }
12332cf86f6SMauro Carvalho Chehab
sz_push_full_space(struct streamzap_ir * sz,unsigned char value)12432cf86f6SMauro Carvalho Chehab static void sz_push_full_space(struct streamzap_ir *sz,
12532cf86f6SMauro Carvalho Chehab unsigned char value)
12632cf86f6SMauro Carvalho Chehab {
1278b3179b7SSean Young struct ir_raw_event rawir = {
1288b3179b7SSean Young .pulse = false,
1298b3179b7SSean Young .duration = value * SZ_RESOLUTION + SZ_RESOLUTION / 2,
1308b3179b7SSean Young };
13132cf86f6SMauro Carvalho Chehab
13232cf86f6SMauro Carvalho Chehab sz_push(sz, rawir);
13332cf86f6SMauro Carvalho Chehab }
13432cf86f6SMauro Carvalho Chehab
sz_push_half_space(struct streamzap_ir * sz,unsigned long value)13532cf86f6SMauro Carvalho Chehab static void sz_push_half_space(struct streamzap_ir *sz,
13632cf86f6SMauro Carvalho Chehab unsigned long value)
13732cf86f6SMauro Carvalho Chehab {
13832cf86f6SMauro Carvalho Chehab sz_push_full_space(sz, value & SZ_SPACE_MASK);
13932cf86f6SMauro Carvalho Chehab }
14032cf86f6SMauro Carvalho Chehab
141cba862dcSMauro Carvalho Chehab /*
14232cf86f6SMauro Carvalho Chehab * streamzap_callback - usb IRQ handler callback
14332cf86f6SMauro Carvalho Chehab *
14432cf86f6SMauro Carvalho Chehab * This procedure is invoked on reception of data from
14532cf86f6SMauro Carvalho Chehab * the usb remote.
14632cf86f6SMauro Carvalho Chehab */
streamzap_callback(struct urb * urb)14732cf86f6SMauro Carvalho Chehab static void streamzap_callback(struct urb *urb)
14832cf86f6SMauro Carvalho Chehab {
14932cf86f6SMauro Carvalho Chehab struct streamzap_ir *sz;
15032cf86f6SMauro Carvalho Chehab unsigned int i;
15132cf86f6SMauro Carvalho Chehab int len;
15232cf86f6SMauro Carvalho Chehab
15332cf86f6SMauro Carvalho Chehab if (!urb)
15432cf86f6SMauro Carvalho Chehab return;
15532cf86f6SMauro Carvalho Chehab
15632cf86f6SMauro Carvalho Chehab sz = urb->context;
15732cf86f6SMauro Carvalho Chehab len = urb->actual_length;
15832cf86f6SMauro Carvalho Chehab
15932cf86f6SMauro Carvalho Chehab switch (urb->status) {
16032cf86f6SMauro Carvalho Chehab case -ECONNRESET:
16132cf86f6SMauro Carvalho Chehab case -ENOENT:
16232cf86f6SMauro Carvalho Chehab case -ESHUTDOWN:
16332cf86f6SMauro Carvalho Chehab /*
16432cf86f6SMauro Carvalho Chehab * this urb is terminated, clean up.
16532cf86f6SMauro Carvalho Chehab * sz might already be invalid at this point
16632cf86f6SMauro Carvalho Chehab */
16732cf86f6SMauro Carvalho Chehab dev_err(sz->dev, "urb terminated, status: %d\n", urb->status);
16832cf86f6SMauro Carvalho Chehab return;
16932cf86f6SMauro Carvalho Chehab default:
17032cf86f6SMauro Carvalho Chehab break;
17132cf86f6SMauro Carvalho Chehab }
17232cf86f6SMauro Carvalho Chehab
17332cf86f6SMauro Carvalho Chehab dev_dbg(sz->dev, "%s: received urb, len %d\n", __func__, len);
17432cf86f6SMauro Carvalho Chehab for (i = 0; i < len; i++) {
17532cf86f6SMauro Carvalho Chehab dev_dbg(sz->dev, "sz->buf_in[%d]: %x\n",
17632cf86f6SMauro Carvalho Chehab i, (unsigned char)sz->buf_in[i]);
17732cf86f6SMauro Carvalho Chehab switch (sz->decoder_state) {
17832cf86f6SMauro Carvalho Chehab case PulseSpace:
17932cf86f6SMauro Carvalho Chehab if ((sz->buf_in[i] & SZ_PULSE_MASK) ==
18032cf86f6SMauro Carvalho Chehab SZ_PULSE_MASK) {
18132cf86f6SMauro Carvalho Chehab sz->decoder_state = FullPulse;
18232cf86f6SMauro Carvalho Chehab continue;
18332cf86f6SMauro Carvalho Chehab } else if ((sz->buf_in[i] & SZ_SPACE_MASK)
18432cf86f6SMauro Carvalho Chehab == SZ_SPACE_MASK) {
18532cf86f6SMauro Carvalho Chehab sz_push_half_pulse(sz, sz->buf_in[i]);
18632cf86f6SMauro Carvalho Chehab sz->decoder_state = FullSpace;
18732cf86f6SMauro Carvalho Chehab continue;
18832cf86f6SMauro Carvalho Chehab } else {
18932cf86f6SMauro Carvalho Chehab sz_push_half_pulse(sz, sz->buf_in[i]);
19032cf86f6SMauro Carvalho Chehab sz_push_half_space(sz, sz->buf_in[i]);
19132cf86f6SMauro Carvalho Chehab }
19232cf86f6SMauro Carvalho Chehab break;
19332cf86f6SMauro Carvalho Chehab case FullPulse:
19432cf86f6SMauro Carvalho Chehab sz_push_full_pulse(sz, sz->buf_in[i]);
19532cf86f6SMauro Carvalho Chehab sz->decoder_state = IgnorePulse;
19632cf86f6SMauro Carvalho Chehab break;
19732cf86f6SMauro Carvalho Chehab case FullSpace:
19832cf86f6SMauro Carvalho Chehab if (sz->buf_in[i] == SZ_TIMEOUT) {
199183e19f5SSean Young struct ir_raw_event rawir = {
200183e19f5SSean Young .pulse = false,
201183e19f5SSean Young .duration = sz->rdev->timeout
202183e19f5SSean Young };
20332cf86f6SMauro Carvalho Chehab sz_push(sz, rawir);
20432cf86f6SMauro Carvalho Chehab } else {
20532cf86f6SMauro Carvalho Chehab sz_push_full_space(sz, sz->buf_in[i]);
20632cf86f6SMauro Carvalho Chehab }
20732cf86f6SMauro Carvalho Chehab sz->decoder_state = PulseSpace;
20832cf86f6SMauro Carvalho Chehab break;
20932cf86f6SMauro Carvalho Chehab case IgnorePulse:
21032cf86f6SMauro Carvalho Chehab if ((sz->buf_in[i] & SZ_SPACE_MASK) ==
21132cf86f6SMauro Carvalho Chehab SZ_SPACE_MASK) {
21232cf86f6SMauro Carvalho Chehab sz->decoder_state = FullSpace;
21332cf86f6SMauro Carvalho Chehab continue;
21432cf86f6SMauro Carvalho Chehab }
21532cf86f6SMauro Carvalho Chehab sz_push_half_space(sz, sz->buf_in[i]);
21632cf86f6SMauro Carvalho Chehab sz->decoder_state = PulseSpace;
21732cf86f6SMauro Carvalho Chehab break;
21832cf86f6SMauro Carvalho Chehab }
21932cf86f6SMauro Carvalho Chehab }
22032cf86f6SMauro Carvalho Chehab
22156b0ec30SJarod Wilson ir_raw_event_handle(sz->rdev);
22232cf86f6SMauro Carvalho Chehab usb_submit_urb(urb, GFP_ATOMIC);
22332cf86f6SMauro Carvalho Chehab }
22432cf86f6SMauro Carvalho Chehab
streamzap_init_rc_dev(struct streamzap_ir * sz,struct usb_device * usbdev)2254df69e46SSean Young static struct rc_dev *streamzap_init_rc_dev(struct streamzap_ir *sz,
2264df69e46SSean Young struct usb_device *usbdev)
22732cf86f6SMauro Carvalho Chehab {
228d8b4b582SDavid Härdeman struct rc_dev *rdev;
22932cf86f6SMauro Carvalho Chehab struct device *dev = sz->dev;
23032cf86f6SMauro Carvalho Chehab int ret;
23132cf86f6SMauro Carvalho Chehab
2320f7499fdSAndi Shyti rdev = rc_allocate_device(RC_DRIVER_IR_RAW);
23335088717SSean Young if (!rdev)
234d8b4b582SDavid Härdeman goto out;
23532cf86f6SMauro Carvalho Chehab
2364df69e46SSean Young usb_make_path(usbdev, sz->phys, sizeof(sz->phys));
23732cf86f6SMauro Carvalho Chehab strlcat(sz->phys, "/input0", sizeof(sz->phys));
23832cf86f6SMauro Carvalho Chehab
2397a25e684SSean Young rdev->device_name = "Streamzap PC Remote Infrared Receiver";
240d8b4b582SDavid Härdeman rdev->input_phys = sz->phys;
2414df69e46SSean Young usb_to_input_id(usbdev, &rdev->input_id);
2425ad1a555SPaul Bender rdev->dev.parent = dev;
243d8b4b582SDavid Härdeman rdev->priv = sz;
2446d741bfeSSean Young rdev->allowed_protocols = RC_PROTO_BIT_ALL_IR_DECODER;
245d8b4b582SDavid Härdeman rdev->driver_name = DRIVER_NAME;
246d8b4b582SDavid Härdeman rdev->map_name = RC_MAP_STREAMZAP;
2478dcea1d6SSean Young rdev->rx_resolution = SZ_RESOLUTION;
24832cf86f6SMauro Carvalho Chehab
249d8b4b582SDavid Härdeman ret = rc_register_device(rdev);
25032cf86f6SMauro Carvalho Chehab if (ret < 0) {
25132cf86f6SMauro Carvalho Chehab dev_err(dev, "remote input device register failed\n");
252d8b4b582SDavid Härdeman goto out;
25332cf86f6SMauro Carvalho Chehab }
25432cf86f6SMauro Carvalho Chehab
255d8b4b582SDavid Härdeman return rdev;
25632cf86f6SMauro Carvalho Chehab
257d8b4b582SDavid Härdeman out:
258d8b4b582SDavid Härdeman rc_free_device(rdev);
25932cf86f6SMauro Carvalho Chehab return NULL;
26032cf86f6SMauro Carvalho Chehab }
26132cf86f6SMauro Carvalho Chehab
262cba862dcSMauro Carvalho Chehab /*
26332cf86f6SMauro Carvalho Chehab * streamzap_probe
26432cf86f6SMauro Carvalho Chehab *
26532cf86f6SMauro Carvalho Chehab * Called by usb-core to associated with a candidate device
26632cf86f6SMauro Carvalho Chehab * On any failure the return value is the ERROR
26732cf86f6SMauro Carvalho Chehab * On success return 0
26832cf86f6SMauro Carvalho Chehab */
streamzap_probe(struct usb_interface * intf,const struct usb_device_id * id)2694c62e976SGreg Kroah-Hartman static int streamzap_probe(struct usb_interface *intf,
27032cf86f6SMauro Carvalho Chehab const struct usb_device_id *id)
27132cf86f6SMauro Carvalho Chehab {
27232cf86f6SMauro Carvalho Chehab struct usb_device *usbdev = interface_to_usbdev(intf);
2734df69e46SSean Young struct usb_endpoint_descriptor *endpoint;
27432cf86f6SMauro Carvalho Chehab struct usb_host_interface *iface_host;
27532cf86f6SMauro Carvalho Chehab struct streamzap_ir *sz = NULL;
27632cf86f6SMauro Carvalho Chehab int retval = -ENOMEM;
27732cf86f6SMauro Carvalho Chehab int pipe, maxp;
27832cf86f6SMauro Carvalho Chehab
27932cf86f6SMauro Carvalho Chehab /* Allocate space for device driver specific data */
28032cf86f6SMauro Carvalho Chehab sz = kzalloc(sizeof(struct streamzap_ir), GFP_KERNEL);
28132cf86f6SMauro Carvalho Chehab if (!sz)
28232cf86f6SMauro Carvalho Chehab return -ENOMEM;
28332cf86f6SMauro Carvalho Chehab
28432cf86f6SMauro Carvalho Chehab /* Check to ensure endpoint information matches requirements */
28532cf86f6SMauro Carvalho Chehab iface_host = intf->cur_altsetting;
28632cf86f6SMauro Carvalho Chehab
28732cf86f6SMauro Carvalho Chehab if (iface_host->desc.bNumEndpoints != 1) {
28832cf86f6SMauro Carvalho Chehab dev_err(&intf->dev, "%s: Unexpected desc.bNumEndpoints (%d)\n",
28932cf86f6SMauro Carvalho Chehab __func__, iface_host->desc.bNumEndpoints);
29032cf86f6SMauro Carvalho Chehab retval = -ENODEV;
29132cf86f6SMauro Carvalho Chehab goto free_sz;
29232cf86f6SMauro Carvalho Chehab }
29332cf86f6SMauro Carvalho Chehab
2944df69e46SSean Young endpoint = &iface_host->endpoint[0].desc;
2954df69e46SSean Young if (!usb_endpoint_dir_in(endpoint)) {
29625ec587cSMauro Carvalho Chehab dev_err(&intf->dev, "%s: endpoint doesn't match input device 02%02x\n",
2974df69e46SSean Young __func__, endpoint->bEndpointAddress);
29832cf86f6SMauro Carvalho Chehab retval = -ENODEV;
29932cf86f6SMauro Carvalho Chehab goto free_sz;
30032cf86f6SMauro Carvalho Chehab }
30132cf86f6SMauro Carvalho Chehab
3024df69e46SSean Young if (!usb_endpoint_xfer_int(endpoint)) {
30325ec587cSMauro Carvalho Chehab dev_err(&intf->dev, "%s: endpoint attributes don't match xfer 02%02x\n",
3044df69e46SSean Young __func__, endpoint->bmAttributes);
30532cf86f6SMauro Carvalho Chehab retval = -ENODEV;
30632cf86f6SMauro Carvalho Chehab goto free_sz;
30732cf86f6SMauro Carvalho Chehab }
30832cf86f6SMauro Carvalho Chehab
3094df69e46SSean Young pipe = usb_rcvintpipe(usbdev, endpoint->bEndpointAddress);
31061f879abSVincent Mailhol maxp = usb_maxpacket(usbdev, pipe);
31132cf86f6SMauro Carvalho Chehab
31232cf86f6SMauro Carvalho Chehab if (maxp == 0) {
31332cf86f6SMauro Carvalho Chehab dev_err(&intf->dev, "%s: endpoint Max Packet Size is 0!?!\n",
31432cf86f6SMauro Carvalho Chehab __func__);
31532cf86f6SMauro Carvalho Chehab retval = -ENODEV;
31632cf86f6SMauro Carvalho Chehab goto free_sz;
31732cf86f6SMauro Carvalho Chehab }
31832cf86f6SMauro Carvalho Chehab
31932cf86f6SMauro Carvalho Chehab /* Allocate the USB buffer and IRQ URB */
32032cf86f6SMauro Carvalho Chehab sz->buf_in = usb_alloc_coherent(usbdev, maxp, GFP_ATOMIC, &sz->dma_in);
32132cf86f6SMauro Carvalho Chehab if (!sz->buf_in)
32232cf86f6SMauro Carvalho Chehab goto free_sz;
32332cf86f6SMauro Carvalho Chehab
32432cf86f6SMauro Carvalho Chehab sz->urb_in = usb_alloc_urb(0, GFP_KERNEL);
32532cf86f6SMauro Carvalho Chehab if (!sz->urb_in)
32632cf86f6SMauro Carvalho Chehab goto free_buf_in;
32732cf86f6SMauro Carvalho Chehab
32832cf86f6SMauro Carvalho Chehab sz->dev = &intf->dev;
32932cf86f6SMauro Carvalho Chehab sz->buf_in_len = maxp;
33032cf86f6SMauro Carvalho Chehab
3314df69e46SSean Young sz->rdev = streamzap_init_rc_dev(sz, usbdev);
332d8b4b582SDavid Härdeman if (!sz->rdev)
333d8b4b582SDavid Härdeman goto rc_dev_fail;
33432cf86f6SMauro Carvalho Chehab
33532cf86f6SMauro Carvalho Chehab sz->decoder_state = PulseSpace;
33632cf86f6SMauro Carvalho Chehab /* FIXME: don't yet have a way to set this */
337528222d8SSean Young sz->rdev->timeout = SZ_TIMEOUT * SZ_RESOLUTION;
33832cf86f6SMauro Carvalho Chehab #if 0
33932cf86f6SMauro Carvalho Chehab /* not yet supported, depends on patches from maxim */
34032cf86f6SMauro Carvalho Chehab /* see also: LIRC_GET_REC_RESOLUTION and LIRC_SET_REC_TIMEOUT */
341528222d8SSean Young sz->min_timeout = SZ_TIMEOUT * SZ_RESOLUTION;
342528222d8SSean Young sz->max_timeout = SZ_TIMEOUT * SZ_RESOLUTION;
34332cf86f6SMauro Carvalho Chehab #endif
34432cf86f6SMauro Carvalho Chehab
34532cf86f6SMauro Carvalho Chehab /* Complete final initialisations */
34632cf86f6SMauro Carvalho Chehab usb_fill_int_urb(sz->urb_in, usbdev, pipe, sz->buf_in,
3474df69e46SSean Young maxp, streamzap_callback, sz, endpoint->bInterval);
34832cf86f6SMauro Carvalho Chehab sz->urb_in->transfer_dma = sz->dma_in;
34932cf86f6SMauro Carvalho Chehab sz->urb_in->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
35032cf86f6SMauro Carvalho Chehab
35132cf86f6SMauro Carvalho Chehab usb_set_intfdata(intf, sz);
35232cf86f6SMauro Carvalho Chehab
35332cf86f6SMauro Carvalho Chehab if (usb_submit_urb(sz->urb_in, GFP_ATOMIC))
35432cf86f6SMauro Carvalho Chehab dev_err(sz->dev, "urb submit failed\n");
35532cf86f6SMauro Carvalho Chehab
35632cf86f6SMauro Carvalho Chehab return 0;
35732cf86f6SMauro Carvalho Chehab
358d8b4b582SDavid Härdeman rc_dev_fail:
35932cf86f6SMauro Carvalho Chehab usb_free_urb(sz->urb_in);
36032cf86f6SMauro Carvalho Chehab free_buf_in:
36132cf86f6SMauro Carvalho Chehab usb_free_coherent(usbdev, maxp, sz->buf_in, sz->dma_in);
36232cf86f6SMauro Carvalho Chehab free_sz:
36332cf86f6SMauro Carvalho Chehab kfree(sz);
36432cf86f6SMauro Carvalho Chehab
36532cf86f6SMauro Carvalho Chehab return retval;
36632cf86f6SMauro Carvalho Chehab }
36732cf86f6SMauro Carvalho Chehab
368cba862dcSMauro Carvalho Chehab /*
36932cf86f6SMauro Carvalho Chehab * streamzap_disconnect
37032cf86f6SMauro Carvalho Chehab *
37132cf86f6SMauro Carvalho Chehab * Called by the usb core when the device is removed from the system.
37232cf86f6SMauro Carvalho Chehab *
37332cf86f6SMauro Carvalho Chehab * This routine guarantees that the driver will not submit any more urbs
37432cf86f6SMauro Carvalho Chehab * by clearing dev->usbdev. It is also supposed to terminate any currently
37532cf86f6SMauro Carvalho Chehab * active urbs. Unfortunately, usb_bulk_msg(), used in streamzap_read(),
37632cf86f6SMauro Carvalho Chehab * does not provide any way to do this.
37732cf86f6SMauro Carvalho Chehab */
streamzap_disconnect(struct usb_interface * interface)37832cf86f6SMauro Carvalho Chehab static void streamzap_disconnect(struct usb_interface *interface)
37932cf86f6SMauro Carvalho Chehab {
38032cf86f6SMauro Carvalho Chehab struct streamzap_ir *sz = usb_get_intfdata(interface);
38132cf86f6SMauro Carvalho Chehab struct usb_device *usbdev = interface_to_usbdev(interface);
38232cf86f6SMauro Carvalho Chehab
38332cf86f6SMauro Carvalho Chehab usb_set_intfdata(interface, NULL);
38432cf86f6SMauro Carvalho Chehab
38532cf86f6SMauro Carvalho Chehab if (!sz)
38632cf86f6SMauro Carvalho Chehab return;
38732cf86f6SMauro Carvalho Chehab
388d8b4b582SDavid Härdeman rc_unregister_device(sz->rdev);
38932cf86f6SMauro Carvalho Chehab usb_kill_urb(sz->urb_in);
39032cf86f6SMauro Carvalho Chehab usb_free_urb(sz->urb_in);
39132cf86f6SMauro Carvalho Chehab usb_free_coherent(usbdev, sz->buf_in_len, sz->buf_in, sz->dma_in);
39232cf86f6SMauro Carvalho Chehab
39332cf86f6SMauro Carvalho Chehab kfree(sz);
39432cf86f6SMauro Carvalho Chehab }
39532cf86f6SMauro Carvalho Chehab
streamzap_suspend(struct usb_interface * intf,pm_message_t message)39632cf86f6SMauro Carvalho Chehab static int streamzap_suspend(struct usb_interface *intf, pm_message_t message)
39732cf86f6SMauro Carvalho Chehab {
39832cf86f6SMauro Carvalho Chehab struct streamzap_ir *sz = usb_get_intfdata(intf);
39932cf86f6SMauro Carvalho Chehab
40032cf86f6SMauro Carvalho Chehab usb_kill_urb(sz->urb_in);
40132cf86f6SMauro Carvalho Chehab
40232cf86f6SMauro Carvalho Chehab return 0;
40332cf86f6SMauro Carvalho Chehab }
40432cf86f6SMauro Carvalho Chehab
streamzap_resume(struct usb_interface * intf)40532cf86f6SMauro Carvalho Chehab static int streamzap_resume(struct usb_interface *intf)
40632cf86f6SMauro Carvalho Chehab {
40732cf86f6SMauro Carvalho Chehab struct streamzap_ir *sz = usb_get_intfdata(intf);
40832cf86f6SMauro Carvalho Chehab
409*6f2f124aSOliver Neukum if (usb_submit_urb(sz->urb_in, GFP_NOIO)) {
4101c195cb1SColin Ian King dev_err(sz->dev, "Error submitting urb\n");
41132cf86f6SMauro Carvalho Chehab return -EIO;
41232cf86f6SMauro Carvalho Chehab }
41332cf86f6SMauro Carvalho Chehab
41432cf86f6SMauro Carvalho Chehab return 0;
41532cf86f6SMauro Carvalho Chehab }
41632cf86f6SMauro Carvalho Chehab
417ecb3b2b3SGreg Kroah-Hartman module_usb_driver(streamzap_driver);
41832cf86f6SMauro Carvalho Chehab
41932cf86f6SMauro Carvalho Chehab MODULE_AUTHOR("Jarod Wilson <jarod@wilsonet.com>");
42032cf86f6SMauro Carvalho Chehab MODULE_DESCRIPTION(DRIVER_DESC);
42132cf86f6SMauro Carvalho Chehab MODULE_LICENSE("GPL");
422