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> 24dd4c22a6STina Ruchandani #include <linux/ktime.h> 2532cf86f6SMauro Carvalho Chehab #include <linux/usb.h> 2632cf86f6SMauro Carvalho Chehab #include <linux/usb/input.h> 276bda9644SMauro Carvalho Chehab #include <media/rc-core.h> 2832cf86f6SMauro Carvalho Chehab 2932cf86f6SMauro Carvalho Chehab #define DRIVER_NAME "streamzap" 3032cf86f6SMauro Carvalho Chehab #define DRIVER_DESC "Streamzap Remote Control driver" 3132cf86f6SMauro Carvalho Chehab 3232cf86f6SMauro Carvalho Chehab #define USB_STREAMZAP_VENDOR_ID 0x0e9c 3332cf86f6SMauro Carvalho Chehab #define USB_STREAMZAP_PRODUCT_ID 0x0000 3432cf86f6SMauro Carvalho Chehab 3532cf86f6SMauro Carvalho Chehab /* table of devices that work with this driver */ 365fad16b5SArvind Yadav static const struct usb_device_id streamzap_table[] = { 3732cf86f6SMauro Carvalho Chehab /* Streamzap Remote Control */ 3832cf86f6SMauro Carvalho Chehab { USB_DEVICE(USB_STREAMZAP_VENDOR_ID, USB_STREAMZAP_PRODUCT_ID) }, 3932cf86f6SMauro Carvalho Chehab /* Terminating entry */ 4032cf86f6SMauro Carvalho Chehab { } 4132cf86f6SMauro Carvalho Chehab }; 4232cf86f6SMauro Carvalho Chehab 4332cf86f6SMauro Carvalho Chehab MODULE_DEVICE_TABLE(usb, streamzap_table); 4432cf86f6SMauro Carvalho Chehab 4532cf86f6SMauro Carvalho Chehab #define SZ_PULSE_MASK 0xf0 4632cf86f6SMauro Carvalho Chehab #define SZ_SPACE_MASK 0x0f 4732cf86f6SMauro Carvalho Chehab #define SZ_TIMEOUT 0xff 4832cf86f6SMauro Carvalho Chehab #define SZ_RESOLUTION 256 4932cf86f6SMauro Carvalho Chehab 5032cf86f6SMauro Carvalho Chehab /* number of samples buffered */ 5132cf86f6SMauro Carvalho Chehab #define SZ_BUF_LEN 128 5232cf86f6SMauro Carvalho Chehab 5332cf86f6SMauro Carvalho Chehab enum StreamzapDecoderState { 5432cf86f6SMauro Carvalho Chehab PulseSpace, 5532cf86f6SMauro Carvalho Chehab FullPulse, 5632cf86f6SMauro Carvalho Chehab FullSpace, 5732cf86f6SMauro Carvalho Chehab IgnorePulse 5832cf86f6SMauro Carvalho Chehab }; 5932cf86f6SMauro Carvalho Chehab 6032cf86f6SMauro Carvalho Chehab /* structure to hold our device specific stuff */ 6132cf86f6SMauro Carvalho Chehab struct streamzap_ir { 6232cf86f6SMauro Carvalho Chehab /* ir-core */ 63d8b4b582SDavid Härdeman struct rc_dev *rdev; 6432cf86f6SMauro Carvalho Chehab 6532cf86f6SMauro Carvalho Chehab /* core device info */ 6632cf86f6SMauro Carvalho Chehab struct device *dev; 6732cf86f6SMauro Carvalho Chehab 6832cf86f6SMauro Carvalho Chehab /* usb */ 6932cf86f6SMauro Carvalho Chehab struct usb_device *usbdev; 7032cf86f6SMauro Carvalho Chehab struct usb_interface *interface; 7132cf86f6SMauro Carvalho Chehab struct usb_endpoint_descriptor *endpoint; 7232cf86f6SMauro Carvalho Chehab struct urb *urb_in; 7332cf86f6SMauro Carvalho Chehab 7432cf86f6SMauro Carvalho Chehab /* buffer & dma */ 7532cf86f6SMauro Carvalho Chehab unsigned char *buf_in; 7632cf86f6SMauro Carvalho Chehab dma_addr_t dma_in; 7732cf86f6SMauro Carvalho Chehab unsigned int buf_in_len; 7832cf86f6SMauro Carvalho Chehab 7932cf86f6SMauro Carvalho Chehab /* track what state we're in */ 8032cf86f6SMauro Carvalho Chehab enum StreamzapDecoderState decoder_state; 8132cf86f6SMauro Carvalho Chehab /* tracks whether we are currently receiving some signal */ 8232cf86f6SMauro Carvalho Chehab bool idle; 8332cf86f6SMauro Carvalho Chehab /* sum of signal lengths received since signal start */ 8432cf86f6SMauro Carvalho Chehab unsigned long sum; 8532cf86f6SMauro Carvalho Chehab /* start time of signal; necessary for gap tracking */ 86dd4c22a6STina Ruchandani ktime_t signal_last; 87dd4c22a6STina Ruchandani ktime_t signal_start; 8832cf86f6SMauro Carvalho Chehab bool timeout_enabled; 8932cf86f6SMauro Carvalho Chehab 9032cf86f6SMauro Carvalho Chehab char phys[64]; 9132cf86f6SMauro Carvalho Chehab }; 9232cf86f6SMauro Carvalho Chehab 9332cf86f6SMauro Carvalho Chehab 9432cf86f6SMauro Carvalho Chehab /* local function prototypes */ 9532cf86f6SMauro Carvalho Chehab static int streamzap_probe(struct usb_interface *interface, 9632cf86f6SMauro Carvalho Chehab const struct usb_device_id *id); 9732cf86f6SMauro Carvalho Chehab static void streamzap_disconnect(struct usb_interface *interface); 9832cf86f6SMauro Carvalho Chehab static void streamzap_callback(struct urb *urb); 9932cf86f6SMauro Carvalho Chehab static int streamzap_suspend(struct usb_interface *intf, pm_message_t message); 10032cf86f6SMauro Carvalho Chehab static int streamzap_resume(struct usb_interface *intf); 10132cf86f6SMauro Carvalho Chehab 10232cf86f6SMauro Carvalho Chehab /* usb specific object needed to register this driver with the usb subsystem */ 10332cf86f6SMauro Carvalho Chehab static struct usb_driver streamzap_driver = { 10432cf86f6SMauro Carvalho Chehab .name = DRIVER_NAME, 10532cf86f6SMauro Carvalho Chehab .probe = streamzap_probe, 10632cf86f6SMauro Carvalho Chehab .disconnect = streamzap_disconnect, 10732cf86f6SMauro Carvalho Chehab .suspend = streamzap_suspend, 10832cf86f6SMauro Carvalho Chehab .resume = streamzap_resume, 10932cf86f6SMauro Carvalho Chehab .id_table = streamzap_table, 11032cf86f6SMauro Carvalho Chehab }; 11132cf86f6SMauro Carvalho Chehab 11232cf86f6SMauro Carvalho Chehab static void sz_push(struct streamzap_ir *sz, struct ir_raw_event rawir) 11332cf86f6SMauro Carvalho Chehab { 11432cf86f6SMauro Carvalho Chehab dev_dbg(sz->dev, "Storing %s with duration %u us\n", 11532cf86f6SMauro Carvalho Chehab (rawir.pulse ? "pulse" : "space"), rawir.duration); 116d8b4b582SDavid Härdeman ir_raw_event_store_with_filter(sz->rdev, &rawir); 11732cf86f6SMauro Carvalho Chehab } 11832cf86f6SMauro Carvalho Chehab 11932cf86f6SMauro Carvalho Chehab static void sz_push_full_pulse(struct streamzap_ir *sz, 12032cf86f6SMauro Carvalho Chehab unsigned char value) 12132cf86f6SMauro Carvalho Chehab { 122183e19f5SSean Young struct ir_raw_event rawir = {}; 12332cf86f6SMauro Carvalho Chehab 12432cf86f6SMauro Carvalho Chehab if (sz->idle) { 125dd4c22a6STina Ruchandani int delta; 12632cf86f6SMauro Carvalho Chehab 12732cf86f6SMauro Carvalho Chehab sz->signal_last = sz->signal_start; 128dd4c22a6STina Ruchandani sz->signal_start = ktime_get_real(); 12932cf86f6SMauro Carvalho Chehab 130dd4c22a6STina Ruchandani delta = ktime_us_delta(sz->signal_start, sz->signal_last); 13132cf86f6SMauro Carvalho Chehab rawir.pulse = false; 132dd4c22a6STina Ruchandani if (delta > (15 * USEC_PER_SEC)) { 13332cf86f6SMauro Carvalho Chehab /* really long time */ 13432cf86f6SMauro Carvalho Chehab rawir.duration = IR_MAX_DURATION; 13532cf86f6SMauro Carvalho Chehab } else { 136dd4c22a6STina Ruchandani rawir.duration = delta; 13732cf86f6SMauro Carvalho Chehab rawir.duration -= sz->sum; 13895cf60aaSMauro Carvalho Chehab rawir.duration = (rawir.duration > IR_MAX_DURATION) ? 13995cf60aaSMauro Carvalho Chehab IR_MAX_DURATION : rawir.duration; 14032cf86f6SMauro Carvalho Chehab } 14132cf86f6SMauro Carvalho Chehab sz_push(sz, rawir); 14232cf86f6SMauro Carvalho Chehab 14332cf86f6SMauro Carvalho Chehab sz->idle = false; 14432cf86f6SMauro Carvalho Chehab sz->sum = 0; 14532cf86f6SMauro Carvalho Chehab } 14632cf86f6SMauro Carvalho Chehab 14732cf86f6SMauro Carvalho Chehab rawir.pulse = true; 14832cf86f6SMauro Carvalho Chehab rawir.duration = ((int) value) * SZ_RESOLUTION; 14932cf86f6SMauro Carvalho Chehab rawir.duration += SZ_RESOLUTION / 2; 15032cf86f6SMauro Carvalho Chehab sz->sum += rawir.duration; 15195cf60aaSMauro Carvalho Chehab rawir.duration = (rawir.duration > IR_MAX_DURATION) ? 15295cf60aaSMauro Carvalho Chehab IR_MAX_DURATION : rawir.duration; 15332cf86f6SMauro Carvalho Chehab sz_push(sz, rawir); 15432cf86f6SMauro Carvalho Chehab } 15532cf86f6SMauro Carvalho Chehab 15632cf86f6SMauro Carvalho Chehab static void sz_push_half_pulse(struct streamzap_ir *sz, 15732cf86f6SMauro Carvalho Chehab unsigned char value) 15832cf86f6SMauro Carvalho Chehab { 15932cf86f6SMauro Carvalho Chehab sz_push_full_pulse(sz, (value & SZ_PULSE_MASK) >> 4); 16032cf86f6SMauro Carvalho Chehab } 16132cf86f6SMauro Carvalho Chehab 16232cf86f6SMauro Carvalho Chehab static void sz_push_full_space(struct streamzap_ir *sz, 16332cf86f6SMauro Carvalho Chehab unsigned char value) 16432cf86f6SMauro Carvalho Chehab { 165183e19f5SSean Young struct ir_raw_event rawir = {}; 16632cf86f6SMauro Carvalho Chehab 16732cf86f6SMauro Carvalho Chehab rawir.pulse = false; 16832cf86f6SMauro Carvalho Chehab rawir.duration = ((int) value) * SZ_RESOLUTION; 16932cf86f6SMauro Carvalho Chehab rawir.duration += SZ_RESOLUTION / 2; 17032cf86f6SMauro Carvalho Chehab sz->sum += rawir.duration; 17132cf86f6SMauro Carvalho Chehab sz_push(sz, rawir); 17232cf86f6SMauro Carvalho Chehab } 17332cf86f6SMauro Carvalho Chehab 17432cf86f6SMauro Carvalho Chehab static void sz_push_half_space(struct streamzap_ir *sz, 17532cf86f6SMauro Carvalho Chehab unsigned long value) 17632cf86f6SMauro Carvalho Chehab { 17732cf86f6SMauro Carvalho Chehab sz_push_full_space(sz, value & SZ_SPACE_MASK); 17832cf86f6SMauro Carvalho Chehab } 17932cf86f6SMauro Carvalho Chehab 180cba862dcSMauro Carvalho Chehab /* 18132cf86f6SMauro Carvalho Chehab * streamzap_callback - usb IRQ handler callback 18232cf86f6SMauro Carvalho Chehab * 18332cf86f6SMauro Carvalho Chehab * This procedure is invoked on reception of data from 18432cf86f6SMauro Carvalho Chehab * the usb remote. 18532cf86f6SMauro Carvalho Chehab */ 18632cf86f6SMauro Carvalho Chehab static void streamzap_callback(struct urb *urb) 18732cf86f6SMauro Carvalho Chehab { 18832cf86f6SMauro Carvalho Chehab struct streamzap_ir *sz; 18932cf86f6SMauro Carvalho Chehab unsigned int i; 19032cf86f6SMauro Carvalho Chehab int len; 19132cf86f6SMauro Carvalho Chehab 19232cf86f6SMauro Carvalho Chehab if (!urb) 19332cf86f6SMauro Carvalho Chehab return; 19432cf86f6SMauro Carvalho Chehab 19532cf86f6SMauro Carvalho Chehab sz = urb->context; 19632cf86f6SMauro Carvalho Chehab len = urb->actual_length; 19732cf86f6SMauro Carvalho Chehab 19832cf86f6SMauro Carvalho Chehab switch (urb->status) { 19932cf86f6SMauro Carvalho Chehab case -ECONNRESET: 20032cf86f6SMauro Carvalho Chehab case -ENOENT: 20132cf86f6SMauro Carvalho Chehab case -ESHUTDOWN: 20232cf86f6SMauro Carvalho Chehab /* 20332cf86f6SMauro Carvalho Chehab * this urb is terminated, clean up. 20432cf86f6SMauro Carvalho Chehab * sz might already be invalid at this point 20532cf86f6SMauro Carvalho Chehab */ 20632cf86f6SMauro Carvalho Chehab dev_err(sz->dev, "urb terminated, status: %d\n", urb->status); 20732cf86f6SMauro Carvalho Chehab return; 20832cf86f6SMauro Carvalho Chehab default: 20932cf86f6SMauro Carvalho Chehab break; 21032cf86f6SMauro Carvalho Chehab } 21132cf86f6SMauro Carvalho Chehab 21232cf86f6SMauro Carvalho Chehab dev_dbg(sz->dev, "%s: received urb, len %d\n", __func__, len); 21332cf86f6SMauro Carvalho Chehab for (i = 0; i < len; i++) { 21432cf86f6SMauro Carvalho Chehab dev_dbg(sz->dev, "sz->buf_in[%d]: %x\n", 21532cf86f6SMauro Carvalho Chehab i, (unsigned char)sz->buf_in[i]); 21632cf86f6SMauro Carvalho Chehab switch (sz->decoder_state) { 21732cf86f6SMauro Carvalho Chehab case PulseSpace: 21832cf86f6SMauro Carvalho Chehab if ((sz->buf_in[i] & SZ_PULSE_MASK) == 21932cf86f6SMauro Carvalho Chehab SZ_PULSE_MASK) { 22032cf86f6SMauro Carvalho Chehab sz->decoder_state = FullPulse; 22132cf86f6SMauro Carvalho Chehab continue; 22232cf86f6SMauro Carvalho Chehab } else if ((sz->buf_in[i] & SZ_SPACE_MASK) 22332cf86f6SMauro Carvalho Chehab == SZ_SPACE_MASK) { 22432cf86f6SMauro Carvalho Chehab sz_push_half_pulse(sz, sz->buf_in[i]); 22532cf86f6SMauro Carvalho Chehab sz->decoder_state = FullSpace; 22632cf86f6SMauro Carvalho Chehab continue; 22732cf86f6SMauro Carvalho Chehab } else { 22832cf86f6SMauro Carvalho Chehab sz_push_half_pulse(sz, sz->buf_in[i]); 22932cf86f6SMauro Carvalho Chehab sz_push_half_space(sz, sz->buf_in[i]); 23032cf86f6SMauro Carvalho Chehab } 23132cf86f6SMauro Carvalho Chehab break; 23232cf86f6SMauro Carvalho Chehab case FullPulse: 23332cf86f6SMauro Carvalho Chehab sz_push_full_pulse(sz, sz->buf_in[i]); 23432cf86f6SMauro Carvalho Chehab sz->decoder_state = IgnorePulse; 23532cf86f6SMauro Carvalho Chehab break; 23632cf86f6SMauro Carvalho Chehab case FullSpace: 23732cf86f6SMauro Carvalho Chehab if (sz->buf_in[i] == SZ_TIMEOUT) { 238183e19f5SSean Young struct ir_raw_event rawir = { 239183e19f5SSean Young .pulse = false, 240183e19f5SSean Young .duration = sz->rdev->timeout 241183e19f5SSean Young }; 24232cf86f6SMauro Carvalho Chehab sz->idle = true; 24332cf86f6SMauro Carvalho Chehab if (sz->timeout_enabled) 24432cf86f6SMauro Carvalho Chehab sz_push(sz, rawir); 24532cf86f6SMauro Carvalho Chehab } else { 24632cf86f6SMauro Carvalho Chehab sz_push_full_space(sz, sz->buf_in[i]); 24732cf86f6SMauro Carvalho Chehab } 24832cf86f6SMauro Carvalho Chehab sz->decoder_state = PulseSpace; 24932cf86f6SMauro Carvalho Chehab break; 25032cf86f6SMauro Carvalho Chehab case IgnorePulse: 25132cf86f6SMauro Carvalho Chehab if ((sz->buf_in[i] & SZ_SPACE_MASK) == 25232cf86f6SMauro Carvalho Chehab SZ_SPACE_MASK) { 25332cf86f6SMauro Carvalho Chehab sz->decoder_state = FullSpace; 25432cf86f6SMauro Carvalho Chehab continue; 25532cf86f6SMauro Carvalho Chehab } 25632cf86f6SMauro Carvalho Chehab sz_push_half_space(sz, sz->buf_in[i]); 25732cf86f6SMauro Carvalho Chehab sz->decoder_state = PulseSpace; 25832cf86f6SMauro Carvalho Chehab break; 25932cf86f6SMauro Carvalho Chehab } 26032cf86f6SMauro Carvalho Chehab } 26132cf86f6SMauro Carvalho Chehab 26256b0ec30SJarod Wilson ir_raw_event_handle(sz->rdev); 26332cf86f6SMauro Carvalho Chehab usb_submit_urb(urb, GFP_ATOMIC); 26432cf86f6SMauro Carvalho Chehab } 26532cf86f6SMauro Carvalho Chehab 266d8b4b582SDavid Härdeman static struct rc_dev *streamzap_init_rc_dev(struct streamzap_ir *sz) 26732cf86f6SMauro Carvalho Chehab { 268d8b4b582SDavid Härdeman struct rc_dev *rdev; 26932cf86f6SMauro Carvalho Chehab struct device *dev = sz->dev; 27032cf86f6SMauro Carvalho Chehab int ret; 27132cf86f6SMauro Carvalho Chehab 2720f7499fdSAndi Shyti rdev = rc_allocate_device(RC_DRIVER_IR_RAW); 273*35088717SSean Young if (!rdev) 274d8b4b582SDavid Härdeman goto out; 27532cf86f6SMauro Carvalho Chehab 27632cf86f6SMauro Carvalho Chehab usb_make_path(sz->usbdev, sz->phys, sizeof(sz->phys)); 27732cf86f6SMauro Carvalho Chehab strlcat(sz->phys, "/input0", sizeof(sz->phys)); 27832cf86f6SMauro Carvalho Chehab 2797a25e684SSean Young rdev->device_name = "Streamzap PC Remote Infrared Receiver"; 280d8b4b582SDavid Härdeman rdev->input_phys = sz->phys; 2815ad1a555SPaul Bender usb_to_input_id(sz->usbdev, &rdev->input_id); 2825ad1a555SPaul Bender rdev->dev.parent = dev; 283d8b4b582SDavid Härdeman rdev->priv = sz; 2846d741bfeSSean Young rdev->allowed_protocols = RC_PROTO_BIT_ALL_IR_DECODER; 285d8b4b582SDavid Härdeman rdev->driver_name = DRIVER_NAME; 286d8b4b582SDavid Härdeman rdev->map_name = RC_MAP_STREAMZAP; 2878dcea1d6SSean Young rdev->rx_resolution = SZ_RESOLUTION; 28832cf86f6SMauro Carvalho Chehab 289d8b4b582SDavid Härdeman ret = rc_register_device(rdev); 29032cf86f6SMauro Carvalho Chehab if (ret < 0) { 29132cf86f6SMauro Carvalho Chehab dev_err(dev, "remote input device register failed\n"); 292d8b4b582SDavid Härdeman goto out; 29332cf86f6SMauro Carvalho Chehab } 29432cf86f6SMauro Carvalho Chehab 295d8b4b582SDavid Härdeman return rdev; 29632cf86f6SMauro Carvalho Chehab 297d8b4b582SDavid Härdeman out: 298d8b4b582SDavid Härdeman rc_free_device(rdev); 29932cf86f6SMauro Carvalho Chehab return NULL; 30032cf86f6SMauro Carvalho Chehab } 30132cf86f6SMauro Carvalho Chehab 302cba862dcSMauro Carvalho Chehab /* 30332cf86f6SMauro Carvalho Chehab * streamzap_probe 30432cf86f6SMauro Carvalho Chehab * 30532cf86f6SMauro Carvalho Chehab * Called by usb-core to associated with a candidate device 30632cf86f6SMauro Carvalho Chehab * On any failure the return value is the ERROR 30732cf86f6SMauro Carvalho Chehab * On success return 0 30832cf86f6SMauro Carvalho Chehab */ 3094c62e976SGreg Kroah-Hartman static int streamzap_probe(struct usb_interface *intf, 31032cf86f6SMauro Carvalho Chehab const struct usb_device_id *id) 31132cf86f6SMauro Carvalho Chehab { 31232cf86f6SMauro Carvalho Chehab struct usb_device *usbdev = interface_to_usbdev(intf); 31332cf86f6SMauro Carvalho Chehab struct usb_host_interface *iface_host; 31432cf86f6SMauro Carvalho Chehab struct streamzap_ir *sz = NULL; 31532cf86f6SMauro Carvalho Chehab int retval = -ENOMEM; 31632cf86f6SMauro Carvalho Chehab int pipe, maxp; 31732cf86f6SMauro Carvalho Chehab 31832cf86f6SMauro Carvalho Chehab /* Allocate space for device driver specific data */ 31932cf86f6SMauro Carvalho Chehab sz = kzalloc(sizeof(struct streamzap_ir), GFP_KERNEL); 32032cf86f6SMauro Carvalho Chehab if (!sz) 32132cf86f6SMauro Carvalho Chehab return -ENOMEM; 32232cf86f6SMauro Carvalho Chehab 32332cf86f6SMauro Carvalho Chehab sz->usbdev = usbdev; 32432cf86f6SMauro Carvalho Chehab sz->interface = intf; 32532cf86f6SMauro Carvalho Chehab 32632cf86f6SMauro Carvalho Chehab /* Check to ensure endpoint information matches requirements */ 32732cf86f6SMauro Carvalho Chehab iface_host = intf->cur_altsetting; 32832cf86f6SMauro Carvalho Chehab 32932cf86f6SMauro Carvalho Chehab if (iface_host->desc.bNumEndpoints != 1) { 33032cf86f6SMauro Carvalho Chehab dev_err(&intf->dev, "%s: Unexpected desc.bNumEndpoints (%d)\n", 33132cf86f6SMauro Carvalho Chehab __func__, iface_host->desc.bNumEndpoints); 33232cf86f6SMauro Carvalho Chehab retval = -ENODEV; 33332cf86f6SMauro Carvalho Chehab goto free_sz; 33432cf86f6SMauro Carvalho Chehab } 33532cf86f6SMauro Carvalho Chehab 33632cf86f6SMauro Carvalho Chehab sz->endpoint = &(iface_host->endpoint[0].desc); 3375611588bSHimangi Saraogi if (!usb_endpoint_dir_in(sz->endpoint)) { 33825ec587cSMauro Carvalho Chehab dev_err(&intf->dev, "%s: endpoint doesn't match input device 02%02x\n", 33925ec587cSMauro Carvalho Chehab __func__, sz->endpoint->bEndpointAddress); 34032cf86f6SMauro Carvalho Chehab retval = -ENODEV; 34132cf86f6SMauro Carvalho Chehab goto free_sz; 34232cf86f6SMauro Carvalho Chehab } 34332cf86f6SMauro Carvalho Chehab 3445611588bSHimangi Saraogi if (!usb_endpoint_xfer_int(sz->endpoint)) { 34525ec587cSMauro Carvalho Chehab dev_err(&intf->dev, "%s: endpoint attributes don't match xfer 02%02x\n", 34625ec587cSMauro Carvalho Chehab __func__, sz->endpoint->bmAttributes); 34732cf86f6SMauro Carvalho Chehab retval = -ENODEV; 34832cf86f6SMauro Carvalho Chehab goto free_sz; 34932cf86f6SMauro Carvalho Chehab } 35032cf86f6SMauro Carvalho Chehab 35132cf86f6SMauro Carvalho Chehab pipe = usb_rcvintpipe(usbdev, sz->endpoint->bEndpointAddress); 35232cf86f6SMauro Carvalho Chehab maxp = usb_maxpacket(usbdev, pipe, usb_pipeout(pipe)); 35332cf86f6SMauro Carvalho Chehab 35432cf86f6SMauro Carvalho Chehab if (maxp == 0) { 35532cf86f6SMauro Carvalho Chehab dev_err(&intf->dev, "%s: endpoint Max Packet Size is 0!?!\n", 35632cf86f6SMauro Carvalho Chehab __func__); 35732cf86f6SMauro Carvalho Chehab retval = -ENODEV; 35832cf86f6SMauro Carvalho Chehab goto free_sz; 35932cf86f6SMauro Carvalho Chehab } 36032cf86f6SMauro Carvalho Chehab 36132cf86f6SMauro Carvalho Chehab /* Allocate the USB buffer and IRQ URB */ 36232cf86f6SMauro Carvalho Chehab sz->buf_in = usb_alloc_coherent(usbdev, maxp, GFP_ATOMIC, &sz->dma_in); 36332cf86f6SMauro Carvalho Chehab if (!sz->buf_in) 36432cf86f6SMauro Carvalho Chehab goto free_sz; 36532cf86f6SMauro Carvalho Chehab 36632cf86f6SMauro Carvalho Chehab sz->urb_in = usb_alloc_urb(0, GFP_KERNEL); 36732cf86f6SMauro Carvalho Chehab if (!sz->urb_in) 36832cf86f6SMauro Carvalho Chehab goto free_buf_in; 36932cf86f6SMauro Carvalho Chehab 37032cf86f6SMauro Carvalho Chehab sz->dev = &intf->dev; 37132cf86f6SMauro Carvalho Chehab sz->buf_in_len = maxp; 37232cf86f6SMauro Carvalho Chehab 373d8b4b582SDavid Härdeman sz->rdev = streamzap_init_rc_dev(sz); 374d8b4b582SDavid Härdeman if (!sz->rdev) 375d8b4b582SDavid Härdeman goto rc_dev_fail; 37632cf86f6SMauro Carvalho Chehab 37732cf86f6SMauro Carvalho Chehab sz->idle = true; 37832cf86f6SMauro Carvalho Chehab sz->decoder_state = PulseSpace; 37932cf86f6SMauro Carvalho Chehab /* FIXME: don't yet have a way to set this */ 38032cf86f6SMauro Carvalho Chehab sz->timeout_enabled = true; 381528222d8SSean Young sz->rdev->timeout = SZ_TIMEOUT * SZ_RESOLUTION; 38232cf86f6SMauro Carvalho Chehab #if 0 38332cf86f6SMauro Carvalho Chehab /* not yet supported, depends on patches from maxim */ 38432cf86f6SMauro Carvalho Chehab /* see also: LIRC_GET_REC_RESOLUTION and LIRC_SET_REC_TIMEOUT */ 385528222d8SSean Young sz->min_timeout = SZ_TIMEOUT * SZ_RESOLUTION; 386528222d8SSean Young sz->max_timeout = SZ_TIMEOUT * SZ_RESOLUTION; 38732cf86f6SMauro Carvalho Chehab #endif 38832cf86f6SMauro Carvalho Chehab 389dd4c22a6STina Ruchandani sz->signal_start = ktime_get_real(); 39032cf86f6SMauro Carvalho Chehab 39132cf86f6SMauro Carvalho Chehab /* Complete final initialisations */ 39232cf86f6SMauro Carvalho Chehab usb_fill_int_urb(sz->urb_in, usbdev, pipe, sz->buf_in, 39332cf86f6SMauro Carvalho Chehab maxp, (usb_complete_t)streamzap_callback, 39432cf86f6SMauro Carvalho Chehab sz, sz->endpoint->bInterval); 39532cf86f6SMauro Carvalho Chehab sz->urb_in->transfer_dma = sz->dma_in; 39632cf86f6SMauro Carvalho Chehab sz->urb_in->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; 39732cf86f6SMauro Carvalho Chehab 39832cf86f6SMauro Carvalho Chehab usb_set_intfdata(intf, sz); 39932cf86f6SMauro Carvalho Chehab 40032cf86f6SMauro Carvalho Chehab if (usb_submit_urb(sz->urb_in, GFP_ATOMIC)) 40132cf86f6SMauro Carvalho Chehab dev_err(sz->dev, "urb submit failed\n"); 40232cf86f6SMauro Carvalho Chehab 40332cf86f6SMauro Carvalho Chehab return 0; 40432cf86f6SMauro Carvalho Chehab 405d8b4b582SDavid Härdeman rc_dev_fail: 40632cf86f6SMauro Carvalho Chehab usb_free_urb(sz->urb_in); 40732cf86f6SMauro Carvalho Chehab free_buf_in: 40832cf86f6SMauro Carvalho Chehab usb_free_coherent(usbdev, maxp, sz->buf_in, sz->dma_in); 40932cf86f6SMauro Carvalho Chehab free_sz: 41032cf86f6SMauro Carvalho Chehab kfree(sz); 41132cf86f6SMauro Carvalho Chehab 41232cf86f6SMauro Carvalho Chehab return retval; 41332cf86f6SMauro Carvalho Chehab } 41432cf86f6SMauro Carvalho Chehab 415cba862dcSMauro Carvalho Chehab /* 41632cf86f6SMauro Carvalho Chehab * streamzap_disconnect 41732cf86f6SMauro Carvalho Chehab * 41832cf86f6SMauro Carvalho Chehab * Called by the usb core when the device is removed from the system. 41932cf86f6SMauro Carvalho Chehab * 42032cf86f6SMauro Carvalho Chehab * This routine guarantees that the driver will not submit any more urbs 42132cf86f6SMauro Carvalho Chehab * by clearing dev->usbdev. It is also supposed to terminate any currently 42232cf86f6SMauro Carvalho Chehab * active urbs. Unfortunately, usb_bulk_msg(), used in streamzap_read(), 42332cf86f6SMauro Carvalho Chehab * does not provide any way to do this. 42432cf86f6SMauro Carvalho Chehab */ 42532cf86f6SMauro Carvalho Chehab static void streamzap_disconnect(struct usb_interface *interface) 42632cf86f6SMauro Carvalho Chehab { 42732cf86f6SMauro Carvalho Chehab struct streamzap_ir *sz = usb_get_intfdata(interface); 42832cf86f6SMauro Carvalho Chehab struct usb_device *usbdev = interface_to_usbdev(interface); 42932cf86f6SMauro Carvalho Chehab 43032cf86f6SMauro Carvalho Chehab usb_set_intfdata(interface, NULL); 43132cf86f6SMauro Carvalho Chehab 43232cf86f6SMauro Carvalho Chehab if (!sz) 43332cf86f6SMauro Carvalho Chehab return; 43432cf86f6SMauro Carvalho Chehab 43532cf86f6SMauro Carvalho Chehab sz->usbdev = NULL; 436d8b4b582SDavid Härdeman rc_unregister_device(sz->rdev); 43732cf86f6SMauro Carvalho Chehab usb_kill_urb(sz->urb_in); 43832cf86f6SMauro Carvalho Chehab usb_free_urb(sz->urb_in); 43932cf86f6SMauro Carvalho Chehab usb_free_coherent(usbdev, sz->buf_in_len, sz->buf_in, sz->dma_in); 44032cf86f6SMauro Carvalho Chehab 44132cf86f6SMauro Carvalho Chehab kfree(sz); 44232cf86f6SMauro Carvalho Chehab } 44332cf86f6SMauro Carvalho Chehab 44432cf86f6SMauro Carvalho Chehab static int streamzap_suspend(struct usb_interface *intf, pm_message_t message) 44532cf86f6SMauro Carvalho Chehab { 44632cf86f6SMauro Carvalho Chehab struct streamzap_ir *sz = usb_get_intfdata(intf); 44732cf86f6SMauro Carvalho Chehab 44832cf86f6SMauro Carvalho Chehab usb_kill_urb(sz->urb_in); 44932cf86f6SMauro Carvalho Chehab 45032cf86f6SMauro Carvalho Chehab return 0; 45132cf86f6SMauro Carvalho Chehab } 45232cf86f6SMauro Carvalho Chehab 45332cf86f6SMauro Carvalho Chehab static int streamzap_resume(struct usb_interface *intf) 45432cf86f6SMauro Carvalho Chehab { 45532cf86f6SMauro Carvalho Chehab struct streamzap_ir *sz = usb_get_intfdata(intf); 45632cf86f6SMauro Carvalho Chehab 45732cf86f6SMauro Carvalho Chehab if (usb_submit_urb(sz->urb_in, GFP_ATOMIC)) { 4581c195cb1SColin Ian King dev_err(sz->dev, "Error submitting urb\n"); 45932cf86f6SMauro Carvalho Chehab return -EIO; 46032cf86f6SMauro Carvalho Chehab } 46132cf86f6SMauro Carvalho Chehab 46232cf86f6SMauro Carvalho Chehab return 0; 46332cf86f6SMauro Carvalho Chehab } 46432cf86f6SMauro Carvalho Chehab 465ecb3b2b3SGreg Kroah-Hartman module_usb_driver(streamzap_driver); 46632cf86f6SMauro Carvalho Chehab 46732cf86f6SMauro Carvalho Chehab MODULE_AUTHOR("Jarod Wilson <jarod@wilsonet.com>"); 46832cf86f6SMauro Carvalho Chehab MODULE_DESCRIPTION(DRIVER_DESC); 46932cf86f6SMauro Carvalho Chehab MODULE_LICENSE("GPL"); 470