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_VERSION "1.61" 3032cf86f6SMauro Carvalho Chehab #define DRIVER_NAME "streamzap" 3132cf86f6SMauro Carvalho Chehab #define DRIVER_DESC "Streamzap Remote Control driver" 3232cf86f6SMauro Carvalho Chehab 3332cf86f6SMauro Carvalho Chehab #define USB_STREAMZAP_VENDOR_ID 0x0e9c 3432cf86f6SMauro Carvalho Chehab #define USB_STREAMZAP_PRODUCT_ID 0x0000 3532cf86f6SMauro Carvalho Chehab 3632cf86f6SMauro Carvalho Chehab /* table of devices that work with this driver */ 375fad16b5SArvind Yadav static const struct usb_device_id streamzap_table[] = { 3832cf86f6SMauro Carvalho Chehab /* Streamzap Remote Control */ 3932cf86f6SMauro Carvalho Chehab { USB_DEVICE(USB_STREAMZAP_VENDOR_ID, USB_STREAMZAP_PRODUCT_ID) }, 4032cf86f6SMauro Carvalho Chehab /* Terminating entry */ 4132cf86f6SMauro Carvalho Chehab { } 4232cf86f6SMauro Carvalho Chehab }; 4332cf86f6SMauro Carvalho Chehab 4432cf86f6SMauro Carvalho Chehab MODULE_DEVICE_TABLE(usb, streamzap_table); 4532cf86f6SMauro Carvalho Chehab 4632cf86f6SMauro Carvalho Chehab #define SZ_PULSE_MASK 0xf0 4732cf86f6SMauro Carvalho Chehab #define SZ_SPACE_MASK 0x0f 4832cf86f6SMauro Carvalho Chehab #define SZ_TIMEOUT 0xff 4932cf86f6SMauro Carvalho Chehab #define SZ_RESOLUTION 256 5032cf86f6SMauro Carvalho Chehab 5132cf86f6SMauro Carvalho Chehab /* number of samples buffered */ 5232cf86f6SMauro Carvalho Chehab #define SZ_BUF_LEN 128 5332cf86f6SMauro Carvalho Chehab 5432cf86f6SMauro Carvalho Chehab enum StreamzapDecoderState { 5532cf86f6SMauro Carvalho Chehab PulseSpace, 5632cf86f6SMauro Carvalho Chehab FullPulse, 5732cf86f6SMauro Carvalho Chehab FullSpace, 5832cf86f6SMauro Carvalho Chehab IgnorePulse 5932cf86f6SMauro Carvalho Chehab }; 6032cf86f6SMauro Carvalho Chehab 6132cf86f6SMauro Carvalho Chehab /* structure to hold our device specific stuff */ 6232cf86f6SMauro Carvalho Chehab struct streamzap_ir { 6332cf86f6SMauro Carvalho Chehab /* ir-core */ 64d8b4b582SDavid Härdeman struct rc_dev *rdev; 6532cf86f6SMauro Carvalho Chehab 6632cf86f6SMauro Carvalho Chehab /* core device info */ 6732cf86f6SMauro Carvalho Chehab struct device *dev; 6832cf86f6SMauro Carvalho Chehab 6932cf86f6SMauro Carvalho Chehab /* usb */ 7032cf86f6SMauro Carvalho Chehab struct usb_device *usbdev; 7132cf86f6SMauro Carvalho Chehab struct usb_interface *interface; 7232cf86f6SMauro Carvalho Chehab struct usb_endpoint_descriptor *endpoint; 7332cf86f6SMauro Carvalho Chehab struct urb *urb_in; 7432cf86f6SMauro Carvalho Chehab 7532cf86f6SMauro Carvalho Chehab /* buffer & dma */ 7632cf86f6SMauro Carvalho Chehab unsigned char *buf_in; 7732cf86f6SMauro Carvalho Chehab dma_addr_t dma_in; 7832cf86f6SMauro Carvalho Chehab unsigned int buf_in_len; 7932cf86f6SMauro Carvalho Chehab 8032cf86f6SMauro Carvalho Chehab /* track what state we're in */ 8132cf86f6SMauro Carvalho Chehab enum StreamzapDecoderState decoder_state; 8232cf86f6SMauro Carvalho Chehab /* tracks whether we are currently receiving some signal */ 8332cf86f6SMauro Carvalho Chehab bool idle; 8432cf86f6SMauro Carvalho Chehab /* sum of signal lengths received since signal start */ 8532cf86f6SMauro Carvalho Chehab unsigned long sum; 8632cf86f6SMauro Carvalho Chehab /* start time of signal; necessary for gap tracking */ 87dd4c22a6STina Ruchandani ktime_t signal_last; 88dd4c22a6STina Ruchandani ktime_t signal_start; 8932cf86f6SMauro Carvalho Chehab bool timeout_enabled; 9032cf86f6SMauro Carvalho Chehab 9132cf86f6SMauro Carvalho Chehab char name[128]; 9232cf86f6SMauro Carvalho Chehab char phys[64]; 9332cf86f6SMauro Carvalho Chehab }; 9432cf86f6SMauro Carvalho Chehab 9532cf86f6SMauro Carvalho Chehab 9632cf86f6SMauro Carvalho Chehab /* local function prototypes */ 9732cf86f6SMauro Carvalho Chehab static int streamzap_probe(struct usb_interface *interface, 9832cf86f6SMauro Carvalho Chehab const struct usb_device_id *id); 9932cf86f6SMauro Carvalho Chehab static void streamzap_disconnect(struct usb_interface *interface); 10032cf86f6SMauro Carvalho Chehab static void streamzap_callback(struct urb *urb); 10132cf86f6SMauro Carvalho Chehab static int streamzap_suspend(struct usb_interface *intf, pm_message_t message); 10232cf86f6SMauro Carvalho Chehab static int streamzap_resume(struct usb_interface *intf); 10332cf86f6SMauro Carvalho Chehab 10432cf86f6SMauro Carvalho Chehab /* usb specific object needed to register this driver with the usb subsystem */ 10532cf86f6SMauro Carvalho Chehab static struct usb_driver streamzap_driver = { 10632cf86f6SMauro Carvalho Chehab .name = DRIVER_NAME, 10732cf86f6SMauro Carvalho Chehab .probe = streamzap_probe, 10832cf86f6SMauro Carvalho Chehab .disconnect = streamzap_disconnect, 10932cf86f6SMauro Carvalho Chehab .suspend = streamzap_suspend, 11032cf86f6SMauro Carvalho Chehab .resume = streamzap_resume, 11132cf86f6SMauro Carvalho Chehab .id_table = streamzap_table, 11232cf86f6SMauro Carvalho Chehab }; 11332cf86f6SMauro Carvalho Chehab 11432cf86f6SMauro Carvalho Chehab static void sz_push(struct streamzap_ir *sz, struct ir_raw_event rawir) 11532cf86f6SMauro Carvalho Chehab { 11632cf86f6SMauro Carvalho Chehab dev_dbg(sz->dev, "Storing %s with duration %u us\n", 11732cf86f6SMauro Carvalho Chehab (rawir.pulse ? "pulse" : "space"), rawir.duration); 118d8b4b582SDavid Härdeman ir_raw_event_store_with_filter(sz->rdev, &rawir); 11932cf86f6SMauro Carvalho Chehab } 12032cf86f6SMauro Carvalho Chehab 12132cf86f6SMauro Carvalho Chehab static void sz_push_full_pulse(struct streamzap_ir *sz, 12232cf86f6SMauro Carvalho Chehab unsigned char value) 12332cf86f6SMauro Carvalho Chehab { 124183e19f5SSean Young struct ir_raw_event rawir = {}; 12532cf86f6SMauro Carvalho Chehab 12632cf86f6SMauro Carvalho Chehab if (sz->idle) { 127dd4c22a6STina Ruchandani int delta; 12832cf86f6SMauro Carvalho Chehab 12932cf86f6SMauro Carvalho Chehab sz->signal_last = sz->signal_start; 130dd4c22a6STina Ruchandani sz->signal_start = ktime_get_real(); 13132cf86f6SMauro Carvalho Chehab 132dd4c22a6STina Ruchandani delta = ktime_us_delta(sz->signal_start, sz->signal_last); 13332cf86f6SMauro Carvalho Chehab rawir.pulse = false; 134dd4c22a6STina Ruchandani if (delta > (15 * USEC_PER_SEC)) { 13532cf86f6SMauro Carvalho Chehab /* really long time */ 13632cf86f6SMauro Carvalho Chehab rawir.duration = IR_MAX_DURATION; 13732cf86f6SMauro Carvalho Chehab } else { 138dd4c22a6STina Ruchandani rawir.duration = delta; 13932cf86f6SMauro Carvalho Chehab rawir.duration -= sz->sum; 140b4608faeSJarod Wilson rawir.duration = US_TO_NS(rawir.duration); 14195cf60aaSMauro Carvalho Chehab rawir.duration = (rawir.duration > IR_MAX_DURATION) ? 14295cf60aaSMauro Carvalho Chehab IR_MAX_DURATION : rawir.duration; 14332cf86f6SMauro Carvalho Chehab } 14432cf86f6SMauro Carvalho Chehab sz_push(sz, rawir); 14532cf86f6SMauro Carvalho Chehab 14632cf86f6SMauro Carvalho Chehab sz->idle = false; 14732cf86f6SMauro Carvalho Chehab sz->sum = 0; 14832cf86f6SMauro Carvalho Chehab } 14932cf86f6SMauro Carvalho Chehab 15032cf86f6SMauro Carvalho Chehab rawir.pulse = true; 15132cf86f6SMauro Carvalho Chehab rawir.duration = ((int) value) * SZ_RESOLUTION; 15232cf86f6SMauro Carvalho Chehab rawir.duration += SZ_RESOLUTION / 2; 15332cf86f6SMauro Carvalho Chehab sz->sum += rawir.duration; 154b4608faeSJarod Wilson rawir.duration = US_TO_NS(rawir.duration); 15595cf60aaSMauro Carvalho Chehab rawir.duration = (rawir.duration > IR_MAX_DURATION) ? 15695cf60aaSMauro Carvalho Chehab IR_MAX_DURATION : rawir.duration; 15732cf86f6SMauro Carvalho Chehab sz_push(sz, rawir); 15832cf86f6SMauro Carvalho Chehab } 15932cf86f6SMauro Carvalho Chehab 16032cf86f6SMauro Carvalho Chehab static void sz_push_half_pulse(struct streamzap_ir *sz, 16132cf86f6SMauro Carvalho Chehab unsigned char value) 16232cf86f6SMauro Carvalho Chehab { 16332cf86f6SMauro Carvalho Chehab sz_push_full_pulse(sz, (value & SZ_PULSE_MASK) >> 4); 16432cf86f6SMauro Carvalho Chehab } 16532cf86f6SMauro Carvalho Chehab 16632cf86f6SMauro Carvalho Chehab static void sz_push_full_space(struct streamzap_ir *sz, 16732cf86f6SMauro Carvalho Chehab unsigned char value) 16832cf86f6SMauro Carvalho Chehab { 169183e19f5SSean Young struct ir_raw_event rawir = {}; 17032cf86f6SMauro Carvalho Chehab 17132cf86f6SMauro Carvalho Chehab rawir.pulse = false; 17232cf86f6SMauro Carvalho Chehab rawir.duration = ((int) value) * SZ_RESOLUTION; 17332cf86f6SMauro Carvalho Chehab rawir.duration += SZ_RESOLUTION / 2; 17432cf86f6SMauro Carvalho Chehab sz->sum += rawir.duration; 175b4608faeSJarod Wilson rawir.duration = US_TO_NS(rawir.duration); 17632cf86f6SMauro Carvalho Chehab sz_push(sz, rawir); 17732cf86f6SMauro Carvalho Chehab } 17832cf86f6SMauro Carvalho Chehab 17932cf86f6SMauro Carvalho Chehab static void sz_push_half_space(struct streamzap_ir *sz, 18032cf86f6SMauro Carvalho Chehab unsigned long value) 18132cf86f6SMauro Carvalho Chehab { 18232cf86f6SMauro Carvalho Chehab sz_push_full_space(sz, value & SZ_SPACE_MASK); 18332cf86f6SMauro Carvalho Chehab } 18432cf86f6SMauro Carvalho Chehab 185cba862dcSMauro Carvalho Chehab /* 18632cf86f6SMauro Carvalho Chehab * streamzap_callback - usb IRQ handler callback 18732cf86f6SMauro Carvalho Chehab * 18832cf86f6SMauro Carvalho Chehab * This procedure is invoked on reception of data from 18932cf86f6SMauro Carvalho Chehab * the usb remote. 19032cf86f6SMauro Carvalho Chehab */ 19132cf86f6SMauro Carvalho Chehab static void streamzap_callback(struct urb *urb) 19232cf86f6SMauro Carvalho Chehab { 19332cf86f6SMauro Carvalho Chehab struct streamzap_ir *sz; 19432cf86f6SMauro Carvalho Chehab unsigned int i; 19532cf86f6SMauro Carvalho Chehab int len; 19632cf86f6SMauro Carvalho Chehab 19732cf86f6SMauro Carvalho Chehab if (!urb) 19832cf86f6SMauro Carvalho Chehab return; 19932cf86f6SMauro Carvalho Chehab 20032cf86f6SMauro Carvalho Chehab sz = urb->context; 20132cf86f6SMauro Carvalho Chehab len = urb->actual_length; 20232cf86f6SMauro Carvalho Chehab 20332cf86f6SMauro Carvalho Chehab switch (urb->status) { 20432cf86f6SMauro Carvalho Chehab case -ECONNRESET: 20532cf86f6SMauro Carvalho Chehab case -ENOENT: 20632cf86f6SMauro Carvalho Chehab case -ESHUTDOWN: 20732cf86f6SMauro Carvalho Chehab /* 20832cf86f6SMauro Carvalho Chehab * this urb is terminated, clean up. 20932cf86f6SMauro Carvalho Chehab * sz might already be invalid at this point 21032cf86f6SMauro Carvalho Chehab */ 21132cf86f6SMauro Carvalho Chehab dev_err(sz->dev, "urb terminated, status: %d\n", urb->status); 21232cf86f6SMauro Carvalho Chehab return; 21332cf86f6SMauro Carvalho Chehab default: 21432cf86f6SMauro Carvalho Chehab break; 21532cf86f6SMauro Carvalho Chehab } 21632cf86f6SMauro Carvalho Chehab 21732cf86f6SMauro Carvalho Chehab dev_dbg(sz->dev, "%s: received urb, len %d\n", __func__, len); 21832cf86f6SMauro Carvalho Chehab for (i = 0; i < len; i++) { 21932cf86f6SMauro Carvalho Chehab dev_dbg(sz->dev, "sz->buf_in[%d]: %x\n", 22032cf86f6SMauro Carvalho Chehab i, (unsigned char)sz->buf_in[i]); 22132cf86f6SMauro Carvalho Chehab switch (sz->decoder_state) { 22232cf86f6SMauro Carvalho Chehab case PulseSpace: 22332cf86f6SMauro Carvalho Chehab if ((sz->buf_in[i] & SZ_PULSE_MASK) == 22432cf86f6SMauro Carvalho Chehab SZ_PULSE_MASK) { 22532cf86f6SMauro Carvalho Chehab sz->decoder_state = FullPulse; 22632cf86f6SMauro Carvalho Chehab continue; 22732cf86f6SMauro Carvalho Chehab } else if ((sz->buf_in[i] & SZ_SPACE_MASK) 22832cf86f6SMauro Carvalho Chehab == SZ_SPACE_MASK) { 22932cf86f6SMauro Carvalho Chehab sz_push_half_pulse(sz, sz->buf_in[i]); 23032cf86f6SMauro Carvalho Chehab sz->decoder_state = FullSpace; 23132cf86f6SMauro Carvalho Chehab continue; 23232cf86f6SMauro Carvalho Chehab } else { 23332cf86f6SMauro Carvalho Chehab sz_push_half_pulse(sz, sz->buf_in[i]); 23432cf86f6SMauro Carvalho Chehab sz_push_half_space(sz, sz->buf_in[i]); 23532cf86f6SMauro Carvalho Chehab } 23632cf86f6SMauro Carvalho Chehab break; 23732cf86f6SMauro Carvalho Chehab case FullPulse: 23832cf86f6SMauro Carvalho Chehab sz_push_full_pulse(sz, sz->buf_in[i]); 23932cf86f6SMauro Carvalho Chehab sz->decoder_state = IgnorePulse; 24032cf86f6SMauro Carvalho Chehab break; 24132cf86f6SMauro Carvalho Chehab case FullSpace: 24232cf86f6SMauro Carvalho Chehab if (sz->buf_in[i] == SZ_TIMEOUT) { 243183e19f5SSean Young struct ir_raw_event rawir = { 244183e19f5SSean Young .pulse = false, 245183e19f5SSean Young .duration = sz->rdev->timeout 246183e19f5SSean Young }; 24732cf86f6SMauro Carvalho Chehab sz->idle = true; 24832cf86f6SMauro Carvalho Chehab if (sz->timeout_enabled) 24932cf86f6SMauro Carvalho Chehab sz_push(sz, rawir); 250d8b4b582SDavid Härdeman ir_raw_event_handle(sz->rdev); 25156b0ec30SJarod Wilson ir_raw_event_reset(sz->rdev); 25232cf86f6SMauro Carvalho Chehab } else { 25332cf86f6SMauro Carvalho Chehab sz_push_full_space(sz, sz->buf_in[i]); 25432cf86f6SMauro Carvalho Chehab } 25532cf86f6SMauro Carvalho Chehab sz->decoder_state = PulseSpace; 25632cf86f6SMauro Carvalho Chehab break; 25732cf86f6SMauro Carvalho Chehab case IgnorePulse: 25832cf86f6SMauro Carvalho Chehab if ((sz->buf_in[i] & SZ_SPACE_MASK) == 25932cf86f6SMauro Carvalho Chehab SZ_SPACE_MASK) { 26032cf86f6SMauro Carvalho Chehab sz->decoder_state = FullSpace; 26132cf86f6SMauro Carvalho Chehab continue; 26232cf86f6SMauro Carvalho Chehab } 26332cf86f6SMauro Carvalho Chehab sz_push_half_space(sz, sz->buf_in[i]); 26432cf86f6SMauro Carvalho Chehab sz->decoder_state = PulseSpace; 26532cf86f6SMauro Carvalho Chehab break; 26632cf86f6SMauro Carvalho Chehab } 26732cf86f6SMauro Carvalho Chehab } 26832cf86f6SMauro Carvalho Chehab 26956b0ec30SJarod Wilson ir_raw_event_handle(sz->rdev); 27032cf86f6SMauro Carvalho Chehab usb_submit_urb(urb, GFP_ATOMIC); 27132cf86f6SMauro Carvalho Chehab 27232cf86f6SMauro Carvalho Chehab return; 27332cf86f6SMauro Carvalho Chehab } 27432cf86f6SMauro Carvalho Chehab 275d8b4b582SDavid Härdeman static struct rc_dev *streamzap_init_rc_dev(struct streamzap_ir *sz) 27632cf86f6SMauro Carvalho Chehab { 277d8b4b582SDavid Härdeman struct rc_dev *rdev; 27832cf86f6SMauro Carvalho Chehab struct device *dev = sz->dev; 27932cf86f6SMauro Carvalho Chehab int ret; 28032cf86f6SMauro Carvalho Chehab 2810f7499fdSAndi Shyti rdev = rc_allocate_device(RC_DRIVER_IR_RAW); 282d8b4b582SDavid Härdeman if (!rdev) { 283d8b4b582SDavid Härdeman dev_err(dev, "remote dev allocation failed\n"); 284d8b4b582SDavid Härdeman goto out; 28532cf86f6SMauro Carvalho Chehab } 28632cf86f6SMauro Carvalho Chehab 28725ec587cSMauro Carvalho Chehab snprintf(sz->name, sizeof(sz->name), "Streamzap PC Remote Infrared Receiver (%04x:%04x)", 28832cf86f6SMauro Carvalho Chehab le16_to_cpu(sz->usbdev->descriptor.idVendor), 28932cf86f6SMauro Carvalho Chehab le16_to_cpu(sz->usbdev->descriptor.idProduct)); 29032cf86f6SMauro Carvalho Chehab usb_make_path(sz->usbdev, sz->phys, sizeof(sz->phys)); 29132cf86f6SMauro Carvalho Chehab strlcat(sz->phys, "/input0", sizeof(sz->phys)); 29232cf86f6SMauro Carvalho Chehab 293518f4b26SSean Young rdev->device_name = sz->name; 294d8b4b582SDavid Härdeman rdev->input_phys = sz->phys; 2955ad1a555SPaul Bender usb_to_input_id(sz->usbdev, &rdev->input_id); 2965ad1a555SPaul Bender rdev->dev.parent = dev; 297d8b4b582SDavid Härdeman rdev->priv = sz; 2986d741bfeSSean Young rdev->allowed_protocols = RC_PROTO_BIT_ALL_IR_DECODER; 299d8b4b582SDavid Härdeman rdev->driver_name = DRIVER_NAME; 300d8b4b582SDavid Härdeman rdev->map_name = RC_MAP_STREAMZAP; 30132cf86f6SMauro Carvalho Chehab 302d8b4b582SDavid Härdeman ret = rc_register_device(rdev); 30332cf86f6SMauro Carvalho Chehab if (ret < 0) { 30432cf86f6SMauro Carvalho Chehab dev_err(dev, "remote input device register failed\n"); 305d8b4b582SDavid Härdeman goto out; 30632cf86f6SMauro Carvalho Chehab } 30732cf86f6SMauro Carvalho Chehab 308d8b4b582SDavid Härdeman return rdev; 30932cf86f6SMauro Carvalho Chehab 310d8b4b582SDavid Härdeman out: 311d8b4b582SDavid Härdeman rc_free_device(rdev); 31232cf86f6SMauro Carvalho Chehab return NULL; 31332cf86f6SMauro Carvalho Chehab } 31432cf86f6SMauro Carvalho Chehab 315cba862dcSMauro Carvalho Chehab /* 31632cf86f6SMauro Carvalho Chehab * streamzap_probe 31732cf86f6SMauro Carvalho Chehab * 31832cf86f6SMauro Carvalho Chehab * Called by usb-core to associated with a candidate device 31932cf86f6SMauro Carvalho Chehab * On any failure the return value is the ERROR 32032cf86f6SMauro Carvalho Chehab * On success return 0 32132cf86f6SMauro Carvalho Chehab */ 3224c62e976SGreg Kroah-Hartman static int streamzap_probe(struct usb_interface *intf, 32332cf86f6SMauro Carvalho Chehab const struct usb_device_id *id) 32432cf86f6SMauro Carvalho Chehab { 32532cf86f6SMauro Carvalho Chehab struct usb_device *usbdev = interface_to_usbdev(intf); 32632cf86f6SMauro Carvalho Chehab struct usb_host_interface *iface_host; 32732cf86f6SMauro Carvalho Chehab struct streamzap_ir *sz = NULL; 32832cf86f6SMauro Carvalho Chehab char buf[63], name[128] = ""; 32932cf86f6SMauro Carvalho Chehab int retval = -ENOMEM; 33032cf86f6SMauro Carvalho Chehab int pipe, maxp; 33132cf86f6SMauro Carvalho Chehab 33232cf86f6SMauro Carvalho Chehab /* Allocate space for device driver specific data */ 33332cf86f6SMauro Carvalho Chehab sz = kzalloc(sizeof(struct streamzap_ir), GFP_KERNEL); 33432cf86f6SMauro Carvalho Chehab if (!sz) 33532cf86f6SMauro Carvalho Chehab return -ENOMEM; 33632cf86f6SMauro Carvalho Chehab 33732cf86f6SMauro Carvalho Chehab sz->usbdev = usbdev; 33832cf86f6SMauro Carvalho Chehab sz->interface = intf; 33932cf86f6SMauro Carvalho Chehab 34032cf86f6SMauro Carvalho Chehab /* Check to ensure endpoint information matches requirements */ 34132cf86f6SMauro Carvalho Chehab iface_host = intf->cur_altsetting; 34232cf86f6SMauro Carvalho Chehab 34332cf86f6SMauro Carvalho Chehab if (iface_host->desc.bNumEndpoints != 1) { 34432cf86f6SMauro Carvalho Chehab dev_err(&intf->dev, "%s: Unexpected desc.bNumEndpoints (%d)\n", 34532cf86f6SMauro Carvalho Chehab __func__, iface_host->desc.bNumEndpoints); 34632cf86f6SMauro Carvalho Chehab retval = -ENODEV; 34732cf86f6SMauro Carvalho Chehab goto free_sz; 34832cf86f6SMauro Carvalho Chehab } 34932cf86f6SMauro Carvalho Chehab 35032cf86f6SMauro Carvalho Chehab sz->endpoint = &(iface_host->endpoint[0].desc); 3515611588bSHimangi Saraogi if (!usb_endpoint_dir_in(sz->endpoint)) { 35225ec587cSMauro Carvalho Chehab dev_err(&intf->dev, "%s: endpoint doesn't match input device 02%02x\n", 35325ec587cSMauro Carvalho Chehab __func__, sz->endpoint->bEndpointAddress); 35432cf86f6SMauro Carvalho Chehab retval = -ENODEV; 35532cf86f6SMauro Carvalho Chehab goto free_sz; 35632cf86f6SMauro Carvalho Chehab } 35732cf86f6SMauro Carvalho Chehab 3585611588bSHimangi Saraogi if (!usb_endpoint_xfer_int(sz->endpoint)) { 35925ec587cSMauro Carvalho Chehab dev_err(&intf->dev, "%s: endpoint attributes don't match xfer 02%02x\n", 36025ec587cSMauro Carvalho Chehab __func__, sz->endpoint->bmAttributes); 36132cf86f6SMauro Carvalho Chehab retval = -ENODEV; 36232cf86f6SMauro Carvalho Chehab goto free_sz; 36332cf86f6SMauro Carvalho Chehab } 36432cf86f6SMauro Carvalho Chehab 36532cf86f6SMauro Carvalho Chehab pipe = usb_rcvintpipe(usbdev, sz->endpoint->bEndpointAddress); 36632cf86f6SMauro Carvalho Chehab maxp = usb_maxpacket(usbdev, pipe, usb_pipeout(pipe)); 36732cf86f6SMauro Carvalho Chehab 36832cf86f6SMauro Carvalho Chehab if (maxp == 0) { 36932cf86f6SMauro Carvalho Chehab dev_err(&intf->dev, "%s: endpoint Max Packet Size is 0!?!\n", 37032cf86f6SMauro Carvalho Chehab __func__); 37132cf86f6SMauro Carvalho Chehab retval = -ENODEV; 37232cf86f6SMauro Carvalho Chehab goto free_sz; 37332cf86f6SMauro Carvalho Chehab } 37432cf86f6SMauro Carvalho Chehab 37532cf86f6SMauro Carvalho Chehab /* Allocate the USB buffer and IRQ URB */ 37632cf86f6SMauro Carvalho Chehab sz->buf_in = usb_alloc_coherent(usbdev, maxp, GFP_ATOMIC, &sz->dma_in); 37732cf86f6SMauro Carvalho Chehab if (!sz->buf_in) 37832cf86f6SMauro Carvalho Chehab goto free_sz; 37932cf86f6SMauro Carvalho Chehab 38032cf86f6SMauro Carvalho Chehab sz->urb_in = usb_alloc_urb(0, GFP_KERNEL); 38132cf86f6SMauro Carvalho Chehab if (!sz->urb_in) 38232cf86f6SMauro Carvalho Chehab goto free_buf_in; 38332cf86f6SMauro Carvalho Chehab 38432cf86f6SMauro Carvalho Chehab sz->dev = &intf->dev; 38532cf86f6SMauro Carvalho Chehab sz->buf_in_len = maxp; 38632cf86f6SMauro Carvalho Chehab 38732cf86f6SMauro Carvalho Chehab if (usbdev->descriptor.iManufacturer 38832cf86f6SMauro Carvalho Chehab && usb_string(usbdev, usbdev->descriptor.iManufacturer, 38932cf86f6SMauro Carvalho Chehab buf, sizeof(buf)) > 0) 390c0decac1SMauro Carvalho Chehab strscpy(name, buf, sizeof(name)); 39132cf86f6SMauro Carvalho Chehab 39232cf86f6SMauro Carvalho Chehab if (usbdev->descriptor.iProduct 39332cf86f6SMauro Carvalho Chehab && usb_string(usbdev, usbdev->descriptor.iProduct, 39432cf86f6SMauro Carvalho Chehab buf, sizeof(buf)) > 0) 39532cf86f6SMauro Carvalho Chehab snprintf(name + strlen(name), sizeof(name) - strlen(name), 39632cf86f6SMauro Carvalho Chehab " %s", buf); 39732cf86f6SMauro Carvalho Chehab 398d8b4b582SDavid Härdeman sz->rdev = streamzap_init_rc_dev(sz); 399d8b4b582SDavid Härdeman if (!sz->rdev) 400d8b4b582SDavid Härdeman goto rc_dev_fail; 40132cf86f6SMauro Carvalho Chehab 40232cf86f6SMauro Carvalho Chehab sz->idle = true; 40332cf86f6SMauro Carvalho Chehab sz->decoder_state = PulseSpace; 40432cf86f6SMauro Carvalho Chehab /* FIXME: don't yet have a way to set this */ 40532cf86f6SMauro Carvalho Chehab sz->timeout_enabled = true; 406b4608faeSJarod Wilson sz->rdev->timeout = ((US_TO_NS(SZ_TIMEOUT * SZ_RESOLUTION) & 40732cf86f6SMauro Carvalho Chehab IR_MAX_DURATION) | 0x03000000); 40832cf86f6SMauro Carvalho Chehab #if 0 40932cf86f6SMauro Carvalho Chehab /* not yet supported, depends on patches from maxim */ 41032cf86f6SMauro Carvalho Chehab /* see also: LIRC_GET_REC_RESOLUTION and LIRC_SET_REC_TIMEOUT */ 411b4608faeSJarod Wilson sz->min_timeout = US_TO_NS(SZ_TIMEOUT * SZ_RESOLUTION); 412b4608faeSJarod Wilson sz->max_timeout = US_TO_NS(SZ_TIMEOUT * SZ_RESOLUTION); 41332cf86f6SMauro Carvalho Chehab #endif 41432cf86f6SMauro Carvalho Chehab 415dd4c22a6STina Ruchandani sz->signal_start = ktime_get_real(); 41632cf86f6SMauro Carvalho Chehab 41732cf86f6SMauro Carvalho Chehab /* Complete final initialisations */ 41832cf86f6SMauro Carvalho Chehab usb_fill_int_urb(sz->urb_in, usbdev, pipe, sz->buf_in, 41932cf86f6SMauro Carvalho Chehab maxp, (usb_complete_t)streamzap_callback, 42032cf86f6SMauro Carvalho Chehab sz, sz->endpoint->bInterval); 42132cf86f6SMauro Carvalho Chehab sz->urb_in->transfer_dma = sz->dma_in; 42232cf86f6SMauro Carvalho Chehab sz->urb_in->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; 42332cf86f6SMauro Carvalho Chehab 42432cf86f6SMauro Carvalho Chehab usb_set_intfdata(intf, sz); 42532cf86f6SMauro Carvalho Chehab 42632cf86f6SMauro Carvalho Chehab if (usb_submit_urb(sz->urb_in, GFP_ATOMIC)) 42732cf86f6SMauro Carvalho Chehab dev_err(sz->dev, "urb submit failed\n"); 42832cf86f6SMauro Carvalho Chehab 42932cf86f6SMauro Carvalho Chehab dev_info(sz->dev, "Registered %s on usb%d:%d\n", name, 43032cf86f6SMauro Carvalho Chehab usbdev->bus->busnum, usbdev->devnum); 43132cf86f6SMauro Carvalho Chehab 43232cf86f6SMauro Carvalho Chehab return 0; 43332cf86f6SMauro Carvalho Chehab 434d8b4b582SDavid Härdeman rc_dev_fail: 43532cf86f6SMauro Carvalho Chehab usb_free_urb(sz->urb_in); 43632cf86f6SMauro Carvalho Chehab free_buf_in: 43732cf86f6SMauro Carvalho Chehab usb_free_coherent(usbdev, maxp, sz->buf_in, sz->dma_in); 43832cf86f6SMauro Carvalho Chehab free_sz: 43932cf86f6SMauro Carvalho Chehab kfree(sz); 44032cf86f6SMauro Carvalho Chehab 44132cf86f6SMauro Carvalho Chehab return retval; 44232cf86f6SMauro Carvalho Chehab } 44332cf86f6SMauro Carvalho Chehab 444cba862dcSMauro Carvalho Chehab /* 44532cf86f6SMauro Carvalho Chehab * streamzap_disconnect 44632cf86f6SMauro Carvalho Chehab * 44732cf86f6SMauro Carvalho Chehab * Called by the usb core when the device is removed from the system. 44832cf86f6SMauro Carvalho Chehab * 44932cf86f6SMauro Carvalho Chehab * This routine guarantees that the driver will not submit any more urbs 45032cf86f6SMauro Carvalho Chehab * by clearing dev->usbdev. It is also supposed to terminate any currently 45132cf86f6SMauro Carvalho Chehab * active urbs. Unfortunately, usb_bulk_msg(), used in streamzap_read(), 45232cf86f6SMauro Carvalho Chehab * does not provide any way to do this. 45332cf86f6SMauro Carvalho Chehab */ 45432cf86f6SMauro Carvalho Chehab static void streamzap_disconnect(struct usb_interface *interface) 45532cf86f6SMauro Carvalho Chehab { 45632cf86f6SMauro Carvalho Chehab struct streamzap_ir *sz = usb_get_intfdata(interface); 45732cf86f6SMauro Carvalho Chehab struct usb_device *usbdev = interface_to_usbdev(interface); 45832cf86f6SMauro Carvalho Chehab 45932cf86f6SMauro Carvalho Chehab usb_set_intfdata(interface, NULL); 46032cf86f6SMauro Carvalho Chehab 46132cf86f6SMauro Carvalho Chehab if (!sz) 46232cf86f6SMauro Carvalho Chehab return; 46332cf86f6SMauro Carvalho Chehab 46432cf86f6SMauro Carvalho Chehab sz->usbdev = NULL; 465d8b4b582SDavid Härdeman rc_unregister_device(sz->rdev); 46632cf86f6SMauro Carvalho Chehab usb_kill_urb(sz->urb_in); 46732cf86f6SMauro Carvalho Chehab usb_free_urb(sz->urb_in); 46832cf86f6SMauro Carvalho Chehab usb_free_coherent(usbdev, sz->buf_in_len, sz->buf_in, sz->dma_in); 46932cf86f6SMauro Carvalho Chehab 47032cf86f6SMauro Carvalho Chehab kfree(sz); 47132cf86f6SMauro Carvalho Chehab } 47232cf86f6SMauro Carvalho Chehab 47332cf86f6SMauro Carvalho Chehab static int streamzap_suspend(struct usb_interface *intf, pm_message_t message) 47432cf86f6SMauro Carvalho Chehab { 47532cf86f6SMauro Carvalho Chehab struct streamzap_ir *sz = usb_get_intfdata(intf); 47632cf86f6SMauro Carvalho Chehab 47732cf86f6SMauro Carvalho Chehab usb_kill_urb(sz->urb_in); 47832cf86f6SMauro Carvalho Chehab 47932cf86f6SMauro Carvalho Chehab return 0; 48032cf86f6SMauro Carvalho Chehab } 48132cf86f6SMauro Carvalho Chehab 48232cf86f6SMauro Carvalho Chehab static int streamzap_resume(struct usb_interface *intf) 48332cf86f6SMauro Carvalho Chehab { 48432cf86f6SMauro Carvalho Chehab struct streamzap_ir *sz = usb_get_intfdata(intf); 48532cf86f6SMauro Carvalho Chehab 48632cf86f6SMauro Carvalho Chehab if (usb_submit_urb(sz->urb_in, GFP_ATOMIC)) { 4871c195cb1SColin Ian King dev_err(sz->dev, "Error submitting urb\n"); 48832cf86f6SMauro Carvalho Chehab return -EIO; 48932cf86f6SMauro Carvalho Chehab } 49032cf86f6SMauro Carvalho Chehab 49132cf86f6SMauro Carvalho Chehab return 0; 49232cf86f6SMauro Carvalho Chehab } 49332cf86f6SMauro Carvalho Chehab 494ecb3b2b3SGreg Kroah-Hartman module_usb_driver(streamzap_driver); 49532cf86f6SMauro Carvalho Chehab 49632cf86f6SMauro Carvalho Chehab MODULE_AUTHOR("Jarod Wilson <jarod@wilsonet.com>"); 49732cf86f6SMauro Carvalho Chehab MODULE_DESCRIPTION(DRIVER_DESC); 49832cf86f6SMauro Carvalho Chehab MODULE_LICENSE("GPL"); 499