132cf86f6SMauro Carvalho Chehab /* 232cf86f6SMauro Carvalho Chehab * Streamzap Remote Control driver 332cf86f6SMauro Carvalho Chehab * 432cf86f6SMauro Carvalho Chehab * Copyright (c) 2005 Christoph Bartelmus <lirc@bartelmus.de> 532cf86f6SMauro Carvalho Chehab * Copyright (c) 2010 Jarod Wilson <jarod@wilsonet.com> 632cf86f6SMauro Carvalho Chehab * 732cf86f6SMauro Carvalho Chehab * This driver was based on the work of Greg Wickham and Adrian 832cf86f6SMauro Carvalho Chehab * Dewhurst. It was substantially rewritten to support correct signal 932cf86f6SMauro Carvalho Chehab * gaps and now maintains a delay buffer, which is used to present 1032cf86f6SMauro Carvalho Chehab * consistent timing behaviour to user space applications. Without the 1132cf86f6SMauro Carvalho Chehab * delay buffer an ugly hack would be required in lircd, which can 1232cf86f6SMauro Carvalho Chehab * cause sluggish signal decoding in certain situations. 1332cf86f6SMauro Carvalho Chehab * 1432cf86f6SMauro Carvalho Chehab * Ported to in-kernel ir-core interface by Jarod Wilson 1532cf86f6SMauro Carvalho Chehab * 1632cf86f6SMauro Carvalho Chehab * This driver is based on the USB skeleton driver packaged with the 1732cf86f6SMauro Carvalho Chehab * kernel; copyright (C) 2001-2003 Greg Kroah-Hartman (greg@kroah.com) 1832cf86f6SMauro Carvalho Chehab * 1932cf86f6SMauro Carvalho Chehab * This program is free software; you can redistribute it and/or modify 2032cf86f6SMauro Carvalho Chehab * it under the terms of the GNU General Public License as published by 2132cf86f6SMauro Carvalho Chehab * the Free Software Foundation; either version 2 of the License, or 2232cf86f6SMauro Carvalho Chehab * (at your option) any later version. 2332cf86f6SMauro Carvalho Chehab * 2432cf86f6SMauro Carvalho Chehab * This program is distributed in the hope that it will be useful, 2532cf86f6SMauro Carvalho Chehab * but WITHOUT ANY WARRANTY; without even the implied warranty of 2632cf86f6SMauro Carvalho Chehab * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 2732cf86f6SMauro Carvalho Chehab * GNU General Public License for more details. 2832cf86f6SMauro Carvalho Chehab */ 2932cf86f6SMauro Carvalho Chehab 3032cf86f6SMauro Carvalho Chehab #include <linux/device.h> 3132cf86f6SMauro Carvalho Chehab #include <linux/module.h> 3232cf86f6SMauro Carvalho Chehab #include <linux/slab.h> 33dd4c22a6STina Ruchandani #include <linux/ktime.h> 3432cf86f6SMauro Carvalho Chehab #include <linux/usb.h> 3532cf86f6SMauro Carvalho Chehab #include <linux/usb/input.h> 366bda9644SMauro Carvalho Chehab #include <media/rc-core.h> 3732cf86f6SMauro Carvalho Chehab 3832cf86f6SMauro Carvalho Chehab #define DRIVER_VERSION "1.61" 3932cf86f6SMauro Carvalho Chehab #define DRIVER_NAME "streamzap" 4032cf86f6SMauro Carvalho Chehab #define DRIVER_DESC "Streamzap Remote Control driver" 4132cf86f6SMauro Carvalho Chehab 4232cf86f6SMauro Carvalho Chehab #define USB_STREAMZAP_VENDOR_ID 0x0e9c 4332cf86f6SMauro Carvalho Chehab #define USB_STREAMZAP_PRODUCT_ID 0x0000 4432cf86f6SMauro Carvalho Chehab 4532cf86f6SMauro Carvalho Chehab /* table of devices that work with this driver */ 465fad16b5SArvind Yadav static const struct usb_device_id streamzap_table[] = { 4732cf86f6SMauro Carvalho Chehab /* Streamzap Remote Control */ 4832cf86f6SMauro Carvalho Chehab { USB_DEVICE(USB_STREAMZAP_VENDOR_ID, USB_STREAMZAP_PRODUCT_ID) }, 4932cf86f6SMauro Carvalho Chehab /* Terminating entry */ 5032cf86f6SMauro Carvalho Chehab { } 5132cf86f6SMauro Carvalho Chehab }; 5232cf86f6SMauro Carvalho Chehab 5332cf86f6SMauro Carvalho Chehab MODULE_DEVICE_TABLE(usb, streamzap_table); 5432cf86f6SMauro Carvalho Chehab 5532cf86f6SMauro Carvalho Chehab #define SZ_PULSE_MASK 0xf0 5632cf86f6SMauro Carvalho Chehab #define SZ_SPACE_MASK 0x0f 5732cf86f6SMauro Carvalho Chehab #define SZ_TIMEOUT 0xff 5832cf86f6SMauro Carvalho Chehab #define SZ_RESOLUTION 256 5932cf86f6SMauro Carvalho Chehab 6032cf86f6SMauro Carvalho Chehab /* number of samples buffered */ 6132cf86f6SMauro Carvalho Chehab #define SZ_BUF_LEN 128 6232cf86f6SMauro Carvalho Chehab 6332cf86f6SMauro Carvalho Chehab enum StreamzapDecoderState { 6432cf86f6SMauro Carvalho Chehab PulseSpace, 6532cf86f6SMauro Carvalho Chehab FullPulse, 6632cf86f6SMauro Carvalho Chehab FullSpace, 6732cf86f6SMauro Carvalho Chehab IgnorePulse 6832cf86f6SMauro Carvalho Chehab }; 6932cf86f6SMauro Carvalho Chehab 7032cf86f6SMauro Carvalho Chehab /* structure to hold our device specific stuff */ 7132cf86f6SMauro Carvalho Chehab struct streamzap_ir { 7232cf86f6SMauro Carvalho Chehab /* ir-core */ 73d8b4b582SDavid Härdeman struct rc_dev *rdev; 7432cf86f6SMauro Carvalho Chehab 7532cf86f6SMauro Carvalho Chehab /* core device info */ 7632cf86f6SMauro Carvalho Chehab struct device *dev; 7732cf86f6SMauro Carvalho Chehab 7832cf86f6SMauro Carvalho Chehab /* usb */ 7932cf86f6SMauro Carvalho Chehab struct usb_device *usbdev; 8032cf86f6SMauro Carvalho Chehab struct usb_interface *interface; 8132cf86f6SMauro Carvalho Chehab struct usb_endpoint_descriptor *endpoint; 8232cf86f6SMauro Carvalho Chehab struct urb *urb_in; 8332cf86f6SMauro Carvalho Chehab 8432cf86f6SMauro Carvalho Chehab /* buffer & dma */ 8532cf86f6SMauro Carvalho Chehab unsigned char *buf_in; 8632cf86f6SMauro Carvalho Chehab dma_addr_t dma_in; 8732cf86f6SMauro Carvalho Chehab unsigned int buf_in_len; 8832cf86f6SMauro Carvalho Chehab 8932cf86f6SMauro Carvalho Chehab /* track what state we're in */ 9032cf86f6SMauro Carvalho Chehab enum StreamzapDecoderState decoder_state; 9132cf86f6SMauro Carvalho Chehab /* tracks whether we are currently receiving some signal */ 9232cf86f6SMauro Carvalho Chehab bool idle; 9332cf86f6SMauro Carvalho Chehab /* sum of signal lengths received since signal start */ 9432cf86f6SMauro Carvalho Chehab unsigned long sum; 9532cf86f6SMauro Carvalho Chehab /* start time of signal; necessary for gap tracking */ 96dd4c22a6STina Ruchandani ktime_t signal_last; 97dd4c22a6STina Ruchandani ktime_t signal_start; 9832cf86f6SMauro Carvalho Chehab bool timeout_enabled; 9932cf86f6SMauro Carvalho Chehab 10032cf86f6SMauro Carvalho Chehab char name[128]; 10132cf86f6SMauro Carvalho Chehab char phys[64]; 10232cf86f6SMauro Carvalho Chehab }; 10332cf86f6SMauro Carvalho Chehab 10432cf86f6SMauro Carvalho Chehab 10532cf86f6SMauro Carvalho Chehab /* local function prototypes */ 10632cf86f6SMauro Carvalho Chehab static int streamzap_probe(struct usb_interface *interface, 10732cf86f6SMauro Carvalho Chehab const struct usb_device_id *id); 10832cf86f6SMauro Carvalho Chehab static void streamzap_disconnect(struct usb_interface *interface); 10932cf86f6SMauro Carvalho Chehab static void streamzap_callback(struct urb *urb); 11032cf86f6SMauro Carvalho Chehab static int streamzap_suspend(struct usb_interface *intf, pm_message_t message); 11132cf86f6SMauro Carvalho Chehab static int streamzap_resume(struct usb_interface *intf); 11232cf86f6SMauro Carvalho Chehab 11332cf86f6SMauro Carvalho Chehab /* usb specific object needed to register this driver with the usb subsystem */ 11432cf86f6SMauro Carvalho Chehab static struct usb_driver streamzap_driver = { 11532cf86f6SMauro Carvalho Chehab .name = DRIVER_NAME, 11632cf86f6SMauro Carvalho Chehab .probe = streamzap_probe, 11732cf86f6SMauro Carvalho Chehab .disconnect = streamzap_disconnect, 11832cf86f6SMauro Carvalho Chehab .suspend = streamzap_suspend, 11932cf86f6SMauro Carvalho Chehab .resume = streamzap_resume, 12032cf86f6SMauro Carvalho Chehab .id_table = streamzap_table, 12132cf86f6SMauro Carvalho Chehab }; 12232cf86f6SMauro Carvalho Chehab 12332cf86f6SMauro Carvalho Chehab static void sz_push(struct streamzap_ir *sz, struct ir_raw_event rawir) 12432cf86f6SMauro Carvalho Chehab { 12532cf86f6SMauro Carvalho Chehab dev_dbg(sz->dev, "Storing %s with duration %u us\n", 12632cf86f6SMauro Carvalho Chehab (rawir.pulse ? "pulse" : "space"), rawir.duration); 127d8b4b582SDavid Härdeman ir_raw_event_store_with_filter(sz->rdev, &rawir); 12832cf86f6SMauro Carvalho Chehab } 12932cf86f6SMauro Carvalho Chehab 13032cf86f6SMauro Carvalho Chehab static void sz_push_full_pulse(struct streamzap_ir *sz, 13132cf86f6SMauro Carvalho Chehab unsigned char value) 13232cf86f6SMauro Carvalho Chehab { 133183e19f5SSean Young struct ir_raw_event rawir = {}; 13432cf86f6SMauro Carvalho Chehab 13532cf86f6SMauro Carvalho Chehab if (sz->idle) { 136dd4c22a6STina Ruchandani int delta; 13732cf86f6SMauro Carvalho Chehab 13832cf86f6SMauro Carvalho Chehab sz->signal_last = sz->signal_start; 139dd4c22a6STina Ruchandani sz->signal_start = ktime_get_real(); 14032cf86f6SMauro Carvalho Chehab 141dd4c22a6STina Ruchandani delta = ktime_us_delta(sz->signal_start, sz->signal_last); 14232cf86f6SMauro Carvalho Chehab rawir.pulse = false; 143dd4c22a6STina Ruchandani if (delta > (15 * USEC_PER_SEC)) { 14432cf86f6SMauro Carvalho Chehab /* really long time */ 14532cf86f6SMauro Carvalho Chehab rawir.duration = IR_MAX_DURATION; 14632cf86f6SMauro Carvalho Chehab } else { 147dd4c22a6STina Ruchandani rawir.duration = delta; 14832cf86f6SMauro Carvalho Chehab rawir.duration -= sz->sum; 149b4608faeSJarod Wilson rawir.duration = US_TO_NS(rawir.duration); 15095cf60aaSMauro Carvalho Chehab rawir.duration = (rawir.duration > IR_MAX_DURATION) ? 15195cf60aaSMauro Carvalho Chehab IR_MAX_DURATION : rawir.duration; 15232cf86f6SMauro Carvalho Chehab } 15332cf86f6SMauro Carvalho Chehab sz_push(sz, rawir); 15432cf86f6SMauro Carvalho Chehab 15532cf86f6SMauro Carvalho Chehab sz->idle = false; 15632cf86f6SMauro Carvalho Chehab sz->sum = 0; 15732cf86f6SMauro Carvalho Chehab } 15832cf86f6SMauro Carvalho Chehab 15932cf86f6SMauro Carvalho Chehab rawir.pulse = true; 16032cf86f6SMauro Carvalho Chehab rawir.duration = ((int) value) * SZ_RESOLUTION; 16132cf86f6SMauro Carvalho Chehab rawir.duration += SZ_RESOLUTION / 2; 16232cf86f6SMauro Carvalho Chehab sz->sum += rawir.duration; 163b4608faeSJarod Wilson rawir.duration = US_TO_NS(rawir.duration); 16495cf60aaSMauro Carvalho Chehab rawir.duration = (rawir.duration > IR_MAX_DURATION) ? 16595cf60aaSMauro Carvalho Chehab IR_MAX_DURATION : rawir.duration; 16632cf86f6SMauro Carvalho Chehab sz_push(sz, rawir); 16732cf86f6SMauro Carvalho Chehab } 16832cf86f6SMauro Carvalho Chehab 16932cf86f6SMauro Carvalho Chehab static void sz_push_half_pulse(struct streamzap_ir *sz, 17032cf86f6SMauro Carvalho Chehab unsigned char value) 17132cf86f6SMauro Carvalho Chehab { 17232cf86f6SMauro Carvalho Chehab sz_push_full_pulse(sz, (value & SZ_PULSE_MASK) >> 4); 17332cf86f6SMauro Carvalho Chehab } 17432cf86f6SMauro Carvalho Chehab 17532cf86f6SMauro Carvalho Chehab static void sz_push_full_space(struct streamzap_ir *sz, 17632cf86f6SMauro Carvalho Chehab unsigned char value) 17732cf86f6SMauro Carvalho Chehab { 178183e19f5SSean Young struct ir_raw_event rawir = {}; 17932cf86f6SMauro Carvalho Chehab 18032cf86f6SMauro Carvalho Chehab rawir.pulse = false; 18132cf86f6SMauro Carvalho Chehab rawir.duration = ((int) value) * SZ_RESOLUTION; 18232cf86f6SMauro Carvalho Chehab rawir.duration += SZ_RESOLUTION / 2; 18332cf86f6SMauro Carvalho Chehab sz->sum += rawir.duration; 184b4608faeSJarod Wilson rawir.duration = US_TO_NS(rawir.duration); 18532cf86f6SMauro Carvalho Chehab sz_push(sz, rawir); 18632cf86f6SMauro Carvalho Chehab } 18732cf86f6SMauro Carvalho Chehab 18832cf86f6SMauro Carvalho Chehab static void sz_push_half_space(struct streamzap_ir *sz, 18932cf86f6SMauro Carvalho Chehab unsigned long value) 19032cf86f6SMauro Carvalho Chehab { 19132cf86f6SMauro Carvalho Chehab sz_push_full_space(sz, value & SZ_SPACE_MASK); 19232cf86f6SMauro Carvalho Chehab } 19332cf86f6SMauro Carvalho Chehab 194cba862dcSMauro Carvalho Chehab /* 19532cf86f6SMauro Carvalho Chehab * streamzap_callback - usb IRQ handler callback 19632cf86f6SMauro Carvalho Chehab * 19732cf86f6SMauro Carvalho Chehab * This procedure is invoked on reception of data from 19832cf86f6SMauro Carvalho Chehab * the usb remote. 19932cf86f6SMauro Carvalho Chehab */ 20032cf86f6SMauro Carvalho Chehab static void streamzap_callback(struct urb *urb) 20132cf86f6SMauro Carvalho Chehab { 20232cf86f6SMauro Carvalho Chehab struct streamzap_ir *sz; 20332cf86f6SMauro Carvalho Chehab unsigned int i; 20432cf86f6SMauro Carvalho Chehab int len; 20532cf86f6SMauro Carvalho Chehab 20632cf86f6SMauro Carvalho Chehab if (!urb) 20732cf86f6SMauro Carvalho Chehab return; 20832cf86f6SMauro Carvalho Chehab 20932cf86f6SMauro Carvalho Chehab sz = urb->context; 21032cf86f6SMauro Carvalho Chehab len = urb->actual_length; 21132cf86f6SMauro Carvalho Chehab 21232cf86f6SMauro Carvalho Chehab switch (urb->status) { 21332cf86f6SMauro Carvalho Chehab case -ECONNRESET: 21432cf86f6SMauro Carvalho Chehab case -ENOENT: 21532cf86f6SMauro Carvalho Chehab case -ESHUTDOWN: 21632cf86f6SMauro Carvalho Chehab /* 21732cf86f6SMauro Carvalho Chehab * this urb is terminated, clean up. 21832cf86f6SMauro Carvalho Chehab * sz might already be invalid at this point 21932cf86f6SMauro Carvalho Chehab */ 22032cf86f6SMauro Carvalho Chehab dev_err(sz->dev, "urb terminated, status: %d\n", urb->status); 22132cf86f6SMauro Carvalho Chehab return; 22232cf86f6SMauro Carvalho Chehab default: 22332cf86f6SMauro Carvalho Chehab break; 22432cf86f6SMauro Carvalho Chehab } 22532cf86f6SMauro Carvalho Chehab 22632cf86f6SMauro Carvalho Chehab dev_dbg(sz->dev, "%s: received urb, len %d\n", __func__, len); 22732cf86f6SMauro Carvalho Chehab for (i = 0; i < len; i++) { 22832cf86f6SMauro Carvalho Chehab dev_dbg(sz->dev, "sz->buf_in[%d]: %x\n", 22932cf86f6SMauro Carvalho Chehab i, (unsigned char)sz->buf_in[i]); 23032cf86f6SMauro Carvalho Chehab switch (sz->decoder_state) { 23132cf86f6SMauro Carvalho Chehab case PulseSpace: 23232cf86f6SMauro Carvalho Chehab if ((sz->buf_in[i] & SZ_PULSE_MASK) == 23332cf86f6SMauro Carvalho Chehab SZ_PULSE_MASK) { 23432cf86f6SMauro Carvalho Chehab sz->decoder_state = FullPulse; 23532cf86f6SMauro Carvalho Chehab continue; 23632cf86f6SMauro Carvalho Chehab } else if ((sz->buf_in[i] & SZ_SPACE_MASK) 23732cf86f6SMauro Carvalho Chehab == SZ_SPACE_MASK) { 23832cf86f6SMauro Carvalho Chehab sz_push_half_pulse(sz, sz->buf_in[i]); 23932cf86f6SMauro Carvalho Chehab sz->decoder_state = FullSpace; 24032cf86f6SMauro Carvalho Chehab continue; 24132cf86f6SMauro Carvalho Chehab } else { 24232cf86f6SMauro Carvalho Chehab sz_push_half_pulse(sz, sz->buf_in[i]); 24332cf86f6SMauro Carvalho Chehab sz_push_half_space(sz, sz->buf_in[i]); 24432cf86f6SMauro Carvalho Chehab } 24532cf86f6SMauro Carvalho Chehab break; 24632cf86f6SMauro Carvalho Chehab case FullPulse: 24732cf86f6SMauro Carvalho Chehab sz_push_full_pulse(sz, sz->buf_in[i]); 24832cf86f6SMauro Carvalho Chehab sz->decoder_state = IgnorePulse; 24932cf86f6SMauro Carvalho Chehab break; 25032cf86f6SMauro Carvalho Chehab case FullSpace: 25132cf86f6SMauro Carvalho Chehab if (sz->buf_in[i] == SZ_TIMEOUT) { 252183e19f5SSean Young struct ir_raw_event rawir = { 253183e19f5SSean Young .pulse = false, 254183e19f5SSean Young .duration = sz->rdev->timeout 255183e19f5SSean Young }; 25632cf86f6SMauro Carvalho Chehab sz->idle = true; 25732cf86f6SMauro Carvalho Chehab if (sz->timeout_enabled) 25832cf86f6SMauro Carvalho Chehab sz_push(sz, rawir); 259d8b4b582SDavid Härdeman ir_raw_event_handle(sz->rdev); 26056b0ec30SJarod Wilson ir_raw_event_reset(sz->rdev); 26132cf86f6SMauro Carvalho Chehab } else { 26232cf86f6SMauro Carvalho Chehab sz_push_full_space(sz, sz->buf_in[i]); 26332cf86f6SMauro Carvalho Chehab } 26432cf86f6SMauro Carvalho Chehab sz->decoder_state = PulseSpace; 26532cf86f6SMauro Carvalho Chehab break; 26632cf86f6SMauro Carvalho Chehab case IgnorePulse: 26732cf86f6SMauro Carvalho Chehab if ((sz->buf_in[i] & SZ_SPACE_MASK) == 26832cf86f6SMauro Carvalho Chehab SZ_SPACE_MASK) { 26932cf86f6SMauro Carvalho Chehab sz->decoder_state = FullSpace; 27032cf86f6SMauro Carvalho Chehab continue; 27132cf86f6SMauro Carvalho Chehab } 27232cf86f6SMauro Carvalho Chehab sz_push_half_space(sz, sz->buf_in[i]); 27332cf86f6SMauro Carvalho Chehab sz->decoder_state = PulseSpace; 27432cf86f6SMauro Carvalho Chehab break; 27532cf86f6SMauro Carvalho Chehab } 27632cf86f6SMauro Carvalho Chehab } 27732cf86f6SMauro Carvalho Chehab 27856b0ec30SJarod Wilson ir_raw_event_handle(sz->rdev); 27932cf86f6SMauro Carvalho Chehab usb_submit_urb(urb, GFP_ATOMIC); 28032cf86f6SMauro Carvalho Chehab 28132cf86f6SMauro Carvalho Chehab return; 28232cf86f6SMauro Carvalho Chehab } 28332cf86f6SMauro Carvalho Chehab 284d8b4b582SDavid Härdeman static struct rc_dev *streamzap_init_rc_dev(struct streamzap_ir *sz) 28532cf86f6SMauro Carvalho Chehab { 286d8b4b582SDavid Härdeman struct rc_dev *rdev; 28732cf86f6SMauro Carvalho Chehab struct device *dev = sz->dev; 28832cf86f6SMauro Carvalho Chehab int ret; 28932cf86f6SMauro Carvalho Chehab 2900f7499fdSAndi Shyti rdev = rc_allocate_device(RC_DRIVER_IR_RAW); 291d8b4b582SDavid Härdeman if (!rdev) { 292d8b4b582SDavid Härdeman dev_err(dev, "remote dev allocation failed\n"); 293d8b4b582SDavid Härdeman goto out; 29432cf86f6SMauro Carvalho Chehab } 29532cf86f6SMauro Carvalho Chehab 29625ec587cSMauro Carvalho Chehab snprintf(sz->name, sizeof(sz->name), "Streamzap PC Remote Infrared Receiver (%04x:%04x)", 29732cf86f6SMauro Carvalho Chehab le16_to_cpu(sz->usbdev->descriptor.idVendor), 29832cf86f6SMauro Carvalho Chehab le16_to_cpu(sz->usbdev->descriptor.idProduct)); 29932cf86f6SMauro Carvalho Chehab usb_make_path(sz->usbdev, sz->phys, sizeof(sz->phys)); 30032cf86f6SMauro Carvalho Chehab strlcat(sz->phys, "/input0", sizeof(sz->phys)); 30132cf86f6SMauro Carvalho Chehab 302518f4b26SSean Young rdev->device_name = sz->name; 303d8b4b582SDavid Härdeman rdev->input_phys = sz->phys; 3045ad1a555SPaul Bender usb_to_input_id(sz->usbdev, &rdev->input_id); 3055ad1a555SPaul Bender rdev->dev.parent = dev; 306d8b4b582SDavid Härdeman rdev->priv = sz; 3076d741bfeSSean Young rdev->allowed_protocols = RC_PROTO_BIT_ALL_IR_DECODER; 308d8b4b582SDavid Härdeman rdev->driver_name = DRIVER_NAME; 309d8b4b582SDavid Härdeman rdev->map_name = RC_MAP_STREAMZAP; 31032cf86f6SMauro Carvalho Chehab 311d8b4b582SDavid Härdeman ret = rc_register_device(rdev); 31232cf86f6SMauro Carvalho Chehab if (ret < 0) { 31332cf86f6SMauro Carvalho Chehab dev_err(dev, "remote input device register failed\n"); 314d8b4b582SDavid Härdeman goto out; 31532cf86f6SMauro Carvalho Chehab } 31632cf86f6SMauro Carvalho Chehab 317d8b4b582SDavid Härdeman return rdev; 31832cf86f6SMauro Carvalho Chehab 319d8b4b582SDavid Härdeman out: 320d8b4b582SDavid Härdeman rc_free_device(rdev); 32132cf86f6SMauro Carvalho Chehab return NULL; 32232cf86f6SMauro Carvalho Chehab } 32332cf86f6SMauro Carvalho Chehab 324cba862dcSMauro Carvalho Chehab /* 32532cf86f6SMauro Carvalho Chehab * streamzap_probe 32632cf86f6SMauro Carvalho Chehab * 32732cf86f6SMauro Carvalho Chehab * Called by usb-core to associated with a candidate device 32832cf86f6SMauro Carvalho Chehab * On any failure the return value is the ERROR 32932cf86f6SMauro Carvalho Chehab * On success return 0 33032cf86f6SMauro Carvalho Chehab */ 3314c62e976SGreg Kroah-Hartman static int streamzap_probe(struct usb_interface *intf, 33232cf86f6SMauro Carvalho Chehab const struct usb_device_id *id) 33332cf86f6SMauro Carvalho Chehab { 33432cf86f6SMauro Carvalho Chehab struct usb_device *usbdev = interface_to_usbdev(intf); 33532cf86f6SMauro Carvalho Chehab struct usb_host_interface *iface_host; 33632cf86f6SMauro Carvalho Chehab struct streamzap_ir *sz = NULL; 33732cf86f6SMauro Carvalho Chehab char buf[63], name[128] = ""; 33832cf86f6SMauro Carvalho Chehab int retval = -ENOMEM; 33932cf86f6SMauro Carvalho Chehab int pipe, maxp; 34032cf86f6SMauro Carvalho Chehab 34132cf86f6SMauro Carvalho Chehab /* Allocate space for device driver specific data */ 34232cf86f6SMauro Carvalho Chehab sz = kzalloc(sizeof(struct streamzap_ir), GFP_KERNEL); 34332cf86f6SMauro Carvalho Chehab if (!sz) 34432cf86f6SMauro Carvalho Chehab return -ENOMEM; 34532cf86f6SMauro Carvalho Chehab 34632cf86f6SMauro Carvalho Chehab sz->usbdev = usbdev; 34732cf86f6SMauro Carvalho Chehab sz->interface = intf; 34832cf86f6SMauro Carvalho Chehab 34932cf86f6SMauro Carvalho Chehab /* Check to ensure endpoint information matches requirements */ 35032cf86f6SMauro Carvalho Chehab iface_host = intf->cur_altsetting; 35132cf86f6SMauro Carvalho Chehab 35232cf86f6SMauro Carvalho Chehab if (iface_host->desc.bNumEndpoints != 1) { 35332cf86f6SMauro Carvalho Chehab dev_err(&intf->dev, "%s: Unexpected desc.bNumEndpoints (%d)\n", 35432cf86f6SMauro Carvalho Chehab __func__, iface_host->desc.bNumEndpoints); 35532cf86f6SMauro Carvalho Chehab retval = -ENODEV; 35632cf86f6SMauro Carvalho Chehab goto free_sz; 35732cf86f6SMauro Carvalho Chehab } 35832cf86f6SMauro Carvalho Chehab 35932cf86f6SMauro Carvalho Chehab sz->endpoint = &(iface_host->endpoint[0].desc); 3605611588bSHimangi Saraogi if (!usb_endpoint_dir_in(sz->endpoint)) { 36125ec587cSMauro Carvalho Chehab dev_err(&intf->dev, "%s: endpoint doesn't match input device 02%02x\n", 36225ec587cSMauro Carvalho Chehab __func__, sz->endpoint->bEndpointAddress); 36332cf86f6SMauro Carvalho Chehab retval = -ENODEV; 36432cf86f6SMauro Carvalho Chehab goto free_sz; 36532cf86f6SMauro Carvalho Chehab } 36632cf86f6SMauro Carvalho Chehab 3675611588bSHimangi Saraogi if (!usb_endpoint_xfer_int(sz->endpoint)) { 36825ec587cSMauro Carvalho Chehab dev_err(&intf->dev, "%s: endpoint attributes don't match xfer 02%02x\n", 36925ec587cSMauro Carvalho Chehab __func__, sz->endpoint->bmAttributes); 37032cf86f6SMauro Carvalho Chehab retval = -ENODEV; 37132cf86f6SMauro Carvalho Chehab goto free_sz; 37232cf86f6SMauro Carvalho Chehab } 37332cf86f6SMauro Carvalho Chehab 37432cf86f6SMauro Carvalho Chehab pipe = usb_rcvintpipe(usbdev, sz->endpoint->bEndpointAddress); 37532cf86f6SMauro Carvalho Chehab maxp = usb_maxpacket(usbdev, pipe, usb_pipeout(pipe)); 37632cf86f6SMauro Carvalho Chehab 37732cf86f6SMauro Carvalho Chehab if (maxp == 0) { 37832cf86f6SMauro Carvalho Chehab dev_err(&intf->dev, "%s: endpoint Max Packet Size is 0!?!\n", 37932cf86f6SMauro Carvalho Chehab __func__); 38032cf86f6SMauro Carvalho Chehab retval = -ENODEV; 38132cf86f6SMauro Carvalho Chehab goto free_sz; 38232cf86f6SMauro Carvalho Chehab } 38332cf86f6SMauro Carvalho Chehab 38432cf86f6SMauro Carvalho Chehab /* Allocate the USB buffer and IRQ URB */ 38532cf86f6SMauro Carvalho Chehab sz->buf_in = usb_alloc_coherent(usbdev, maxp, GFP_ATOMIC, &sz->dma_in); 38632cf86f6SMauro Carvalho Chehab if (!sz->buf_in) 38732cf86f6SMauro Carvalho Chehab goto free_sz; 38832cf86f6SMauro Carvalho Chehab 38932cf86f6SMauro Carvalho Chehab sz->urb_in = usb_alloc_urb(0, GFP_KERNEL); 39032cf86f6SMauro Carvalho Chehab if (!sz->urb_in) 39132cf86f6SMauro Carvalho Chehab goto free_buf_in; 39232cf86f6SMauro Carvalho Chehab 39332cf86f6SMauro Carvalho Chehab sz->dev = &intf->dev; 39432cf86f6SMauro Carvalho Chehab sz->buf_in_len = maxp; 39532cf86f6SMauro Carvalho Chehab 39632cf86f6SMauro Carvalho Chehab if (usbdev->descriptor.iManufacturer 39732cf86f6SMauro Carvalho Chehab && usb_string(usbdev, usbdev->descriptor.iManufacturer, 39832cf86f6SMauro Carvalho Chehab buf, sizeof(buf)) > 0) 399c0decac1SMauro Carvalho Chehab strscpy(name, buf, sizeof(name)); 40032cf86f6SMauro Carvalho Chehab 40132cf86f6SMauro Carvalho Chehab if (usbdev->descriptor.iProduct 40232cf86f6SMauro Carvalho Chehab && usb_string(usbdev, usbdev->descriptor.iProduct, 40332cf86f6SMauro Carvalho Chehab buf, sizeof(buf)) > 0) 40432cf86f6SMauro Carvalho Chehab snprintf(name + strlen(name), sizeof(name) - strlen(name), 40532cf86f6SMauro Carvalho Chehab " %s", buf); 40632cf86f6SMauro Carvalho Chehab 407d8b4b582SDavid Härdeman sz->rdev = streamzap_init_rc_dev(sz); 408d8b4b582SDavid Härdeman if (!sz->rdev) 409d8b4b582SDavid Härdeman goto rc_dev_fail; 41032cf86f6SMauro Carvalho Chehab 41132cf86f6SMauro Carvalho Chehab sz->idle = true; 41232cf86f6SMauro Carvalho Chehab sz->decoder_state = PulseSpace; 41332cf86f6SMauro Carvalho Chehab /* FIXME: don't yet have a way to set this */ 41432cf86f6SMauro Carvalho Chehab sz->timeout_enabled = true; 415b4608faeSJarod Wilson sz->rdev->timeout = ((US_TO_NS(SZ_TIMEOUT * SZ_RESOLUTION) & 41632cf86f6SMauro Carvalho Chehab IR_MAX_DURATION) | 0x03000000); 41732cf86f6SMauro Carvalho Chehab #if 0 41832cf86f6SMauro Carvalho Chehab /* not yet supported, depends on patches from maxim */ 41932cf86f6SMauro Carvalho Chehab /* see also: LIRC_GET_REC_RESOLUTION and LIRC_SET_REC_TIMEOUT */ 420b4608faeSJarod Wilson sz->min_timeout = US_TO_NS(SZ_TIMEOUT * SZ_RESOLUTION); 421b4608faeSJarod Wilson sz->max_timeout = US_TO_NS(SZ_TIMEOUT * SZ_RESOLUTION); 42232cf86f6SMauro Carvalho Chehab #endif 42332cf86f6SMauro Carvalho Chehab 424dd4c22a6STina Ruchandani sz->signal_start = ktime_get_real(); 42532cf86f6SMauro Carvalho Chehab 42632cf86f6SMauro Carvalho Chehab /* Complete final initialisations */ 42732cf86f6SMauro Carvalho Chehab usb_fill_int_urb(sz->urb_in, usbdev, pipe, sz->buf_in, 42832cf86f6SMauro Carvalho Chehab maxp, (usb_complete_t)streamzap_callback, 42932cf86f6SMauro Carvalho Chehab sz, sz->endpoint->bInterval); 43032cf86f6SMauro Carvalho Chehab sz->urb_in->transfer_dma = sz->dma_in; 43132cf86f6SMauro Carvalho Chehab sz->urb_in->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; 43232cf86f6SMauro Carvalho Chehab 43332cf86f6SMauro Carvalho Chehab usb_set_intfdata(intf, sz); 43432cf86f6SMauro Carvalho Chehab 43532cf86f6SMauro Carvalho Chehab if (usb_submit_urb(sz->urb_in, GFP_ATOMIC)) 43632cf86f6SMauro Carvalho Chehab dev_err(sz->dev, "urb submit failed\n"); 43732cf86f6SMauro Carvalho Chehab 43832cf86f6SMauro Carvalho Chehab dev_info(sz->dev, "Registered %s on usb%d:%d\n", name, 43932cf86f6SMauro Carvalho Chehab usbdev->bus->busnum, usbdev->devnum); 44032cf86f6SMauro Carvalho Chehab 44132cf86f6SMauro Carvalho Chehab return 0; 44232cf86f6SMauro Carvalho Chehab 443d8b4b582SDavid Härdeman rc_dev_fail: 44432cf86f6SMauro Carvalho Chehab usb_free_urb(sz->urb_in); 44532cf86f6SMauro Carvalho Chehab free_buf_in: 44632cf86f6SMauro Carvalho Chehab usb_free_coherent(usbdev, maxp, sz->buf_in, sz->dma_in); 44732cf86f6SMauro Carvalho Chehab free_sz: 44832cf86f6SMauro Carvalho Chehab kfree(sz); 44932cf86f6SMauro Carvalho Chehab 45032cf86f6SMauro Carvalho Chehab return retval; 45132cf86f6SMauro Carvalho Chehab } 45232cf86f6SMauro Carvalho Chehab 453cba862dcSMauro Carvalho Chehab /* 45432cf86f6SMauro Carvalho Chehab * streamzap_disconnect 45532cf86f6SMauro Carvalho Chehab * 45632cf86f6SMauro Carvalho Chehab * Called by the usb core when the device is removed from the system. 45732cf86f6SMauro Carvalho Chehab * 45832cf86f6SMauro Carvalho Chehab * This routine guarantees that the driver will not submit any more urbs 45932cf86f6SMauro Carvalho Chehab * by clearing dev->usbdev. It is also supposed to terminate any currently 46032cf86f6SMauro Carvalho Chehab * active urbs. Unfortunately, usb_bulk_msg(), used in streamzap_read(), 46132cf86f6SMauro Carvalho Chehab * does not provide any way to do this. 46232cf86f6SMauro Carvalho Chehab */ 46332cf86f6SMauro Carvalho Chehab static void streamzap_disconnect(struct usb_interface *interface) 46432cf86f6SMauro Carvalho Chehab { 46532cf86f6SMauro Carvalho Chehab struct streamzap_ir *sz = usb_get_intfdata(interface); 46632cf86f6SMauro Carvalho Chehab struct usb_device *usbdev = interface_to_usbdev(interface); 46732cf86f6SMauro Carvalho Chehab 46832cf86f6SMauro Carvalho Chehab usb_set_intfdata(interface, NULL); 46932cf86f6SMauro Carvalho Chehab 47032cf86f6SMauro Carvalho Chehab if (!sz) 47132cf86f6SMauro Carvalho Chehab return; 47232cf86f6SMauro Carvalho Chehab 47332cf86f6SMauro Carvalho Chehab sz->usbdev = NULL; 474d8b4b582SDavid Härdeman rc_unregister_device(sz->rdev); 47532cf86f6SMauro Carvalho Chehab usb_kill_urb(sz->urb_in); 47632cf86f6SMauro Carvalho Chehab usb_free_urb(sz->urb_in); 47732cf86f6SMauro Carvalho Chehab usb_free_coherent(usbdev, sz->buf_in_len, sz->buf_in, sz->dma_in); 47832cf86f6SMauro Carvalho Chehab 47932cf86f6SMauro Carvalho Chehab kfree(sz); 48032cf86f6SMauro Carvalho Chehab } 48132cf86f6SMauro Carvalho Chehab 48232cf86f6SMauro Carvalho Chehab static int streamzap_suspend(struct usb_interface *intf, pm_message_t message) 48332cf86f6SMauro Carvalho Chehab { 48432cf86f6SMauro Carvalho Chehab struct streamzap_ir *sz = usb_get_intfdata(intf); 48532cf86f6SMauro Carvalho Chehab 48632cf86f6SMauro Carvalho Chehab usb_kill_urb(sz->urb_in); 48732cf86f6SMauro Carvalho Chehab 48832cf86f6SMauro Carvalho Chehab return 0; 48932cf86f6SMauro Carvalho Chehab } 49032cf86f6SMauro Carvalho Chehab 49132cf86f6SMauro Carvalho Chehab static int streamzap_resume(struct usb_interface *intf) 49232cf86f6SMauro Carvalho Chehab { 49332cf86f6SMauro Carvalho Chehab struct streamzap_ir *sz = usb_get_intfdata(intf); 49432cf86f6SMauro Carvalho Chehab 49532cf86f6SMauro Carvalho Chehab if (usb_submit_urb(sz->urb_in, GFP_ATOMIC)) { 4961c195cb1SColin Ian King dev_err(sz->dev, "Error submitting urb\n"); 49732cf86f6SMauro Carvalho Chehab return -EIO; 49832cf86f6SMauro Carvalho Chehab } 49932cf86f6SMauro Carvalho Chehab 50032cf86f6SMauro Carvalho Chehab return 0; 50132cf86f6SMauro Carvalho Chehab } 50232cf86f6SMauro Carvalho Chehab 503ecb3b2b3SGreg Kroah-Hartman module_usb_driver(streamzap_driver); 50432cf86f6SMauro Carvalho Chehab 50532cf86f6SMauro Carvalho Chehab MODULE_AUTHOR("Jarod Wilson <jarod@wilsonet.com>"); 50632cf86f6SMauro Carvalho Chehab MODULE_DESCRIPTION(DRIVER_DESC); 50732cf86f6SMauro Carvalho Chehab MODULE_LICENSE("GPL"); 508