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![Jarod Wilson](/assets/img/avatar_default.png)
Give it a few tries, then exit. Prevents a possible endless loop situation. Signed-off-by: Jarod Wilson <jarod@redhat.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
1678 lines
41 KiB
C
1678 lines
41 KiB
C
/*
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* i2c IR lirc driver for devices with zilog IR processors
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*
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* Copyright (c) 2000 Gerd Knorr <kraxel@goldbach.in-berlin.de>
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* modified for PixelView (BT878P+W/FM) by
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* Michal Kochanowicz <mkochano@pld.org.pl>
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* Christoph Bartelmus <lirc@bartelmus.de>
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* modified for KNC ONE TV Station/Anubis Typhoon TView Tuner by
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* Ulrich Mueller <ulrich.mueller42@web.de>
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* modified for Asus TV-Box and Creative/VisionTek BreakOut-Box by
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* Stefan Jahn <stefan@lkcc.org>
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* modified for inclusion into kernel sources by
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* Jerome Brock <jbrock@users.sourceforge.net>
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* modified for Leadtek Winfast PVR2000 by
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* Thomas Reitmayr (treitmayr@yahoo.com)
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* modified for Hauppauge PVR-150 IR TX device by
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* Mark Weaver <mark@npsl.co.uk>
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* changed name from lirc_pvr150 to lirc_zilog, works on more than pvr-150
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* Jarod Wilson <jarod@redhat.com>
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*
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* parts are cut&pasted from the lirc_i2c.c driver
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*
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* Numerous changes updating lirc_zilog.c in kernel 2.6.38 and later are
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* Copyright (C) 2011 Andy Walls <awalls@md.metrocast.net>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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*/
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#include <linux/version.h>
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#include <linux/module.h>
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#include <linux/kmod.h>
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#include <linux/kernel.h>
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#include <linux/sched.h>
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#include <linux/fs.h>
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#include <linux/poll.h>
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#include <linux/string.h>
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#include <linux/timer.h>
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#include <linux/delay.h>
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#include <linux/completion.h>
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#include <linux/errno.h>
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#include <linux/slab.h>
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#include <linux/i2c.h>
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#include <linux/firmware.h>
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#include <linux/vmalloc.h>
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#include <linux/mutex.h>
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#include <linux/kthread.h>
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#include <media/lirc_dev.h>
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#include <media/lirc.h>
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struct IR;
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struct IR_rx {
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struct kref ref;
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struct IR *ir;
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/* RX device */
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struct mutex client_lock;
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struct i2c_client *c;
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/* RX polling thread data */
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struct task_struct *task;
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/* RX read data */
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unsigned char b[3];
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bool hdpvr_data_fmt;
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};
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struct IR_tx {
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struct kref ref;
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struct IR *ir;
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/* TX device */
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struct mutex client_lock;
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struct i2c_client *c;
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/* TX additional actions needed */
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int need_boot;
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bool post_tx_ready_poll;
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};
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struct IR {
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struct kref ref;
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struct list_head list;
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/* FIXME spinlock access to l.features */
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struct lirc_driver l;
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struct lirc_buffer rbuf;
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struct mutex ir_lock;
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atomic_t open_count;
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struct i2c_adapter *adapter;
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spinlock_t rx_ref_lock; /* struct IR_rx kref get()/put() */
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struct IR_rx *rx;
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spinlock_t tx_ref_lock; /* struct IR_tx kref get()/put() */
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struct IR_tx *tx;
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};
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/* IR transceiver instance object list */
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/*
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* This lock is used for the following:
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* a. ir_devices_list access, insertions, deletions
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* b. struct IR kref get()s and put()s
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* c. serialization of ir_probe() for the two i2c_clients for a Z8
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*/
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static DEFINE_MUTEX(ir_devices_lock);
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static LIST_HEAD(ir_devices_list);
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/* Block size for IR transmitter */
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#define TX_BLOCK_SIZE 99
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/* Hauppauge IR transmitter data */
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struct tx_data_struct {
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/* Boot block */
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unsigned char *boot_data;
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/* Start of binary data block */
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unsigned char *datap;
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/* End of binary data block */
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unsigned char *endp;
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/* Number of installed codesets */
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unsigned int num_code_sets;
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/* Pointers to codesets */
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unsigned char **code_sets;
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/* Global fixed data template */
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int fixed[TX_BLOCK_SIZE];
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};
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static struct tx_data_struct *tx_data;
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static struct mutex tx_data_lock;
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#define zilog_notify(s, args...) printk(KERN_NOTICE KBUILD_MODNAME ": " s, \
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## args)
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#define zilog_error(s, args...) printk(KERN_ERR KBUILD_MODNAME ": " s, ## args)
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#define zilog_info(s, args...) printk(KERN_INFO KBUILD_MODNAME ": " s, ## args)
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/* module parameters */
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static int debug; /* debug output */
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static int tx_only; /* only handle the IR Tx function */
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static int minor = -1; /* minor number */
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#define dprintk(fmt, args...) \
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do { \
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if (debug) \
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printk(KERN_DEBUG KBUILD_MODNAME ": " fmt, \
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## args); \
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} while (0)
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/* struct IR reference counting */
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static struct IR *get_ir_device(struct IR *ir, bool ir_devices_lock_held)
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{
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if (ir_devices_lock_held) {
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kref_get(&ir->ref);
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} else {
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mutex_lock(&ir_devices_lock);
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kref_get(&ir->ref);
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mutex_unlock(&ir_devices_lock);
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}
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return ir;
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}
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static void release_ir_device(struct kref *ref)
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{
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struct IR *ir = container_of(ref, struct IR, ref);
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/*
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* Things should be in this state by now:
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* ir->rx set to NULL and deallocated - happens before ir->rx->ir put()
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* ir->rx->task kthread stopped - happens before ir->rx->ir put()
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* ir->tx set to NULL and deallocated - happens before ir->tx->ir put()
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* ir->open_count == 0 - happens on final close()
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* ir_lock, tx_ref_lock, rx_ref_lock, all released
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*/
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if (ir->l.minor >= 0 && ir->l.minor < MAX_IRCTL_DEVICES) {
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lirc_unregister_driver(ir->l.minor);
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ir->l.minor = MAX_IRCTL_DEVICES;
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}
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if (ir->rbuf.fifo_initialized)
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lirc_buffer_free(&ir->rbuf);
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list_del(&ir->list);
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kfree(ir);
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}
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static int put_ir_device(struct IR *ir, bool ir_devices_lock_held)
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{
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int released;
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if (ir_devices_lock_held)
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return kref_put(&ir->ref, release_ir_device);
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mutex_lock(&ir_devices_lock);
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released = kref_put(&ir->ref, release_ir_device);
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mutex_unlock(&ir_devices_lock);
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return released;
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}
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/* struct IR_rx reference counting */
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static struct IR_rx *get_ir_rx(struct IR *ir)
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{
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struct IR_rx *rx;
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spin_lock(&ir->rx_ref_lock);
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rx = ir->rx;
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if (rx != NULL)
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kref_get(&rx->ref);
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spin_unlock(&ir->rx_ref_lock);
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return rx;
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}
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static void destroy_rx_kthread(struct IR_rx *rx, bool ir_devices_lock_held)
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{
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/* end up polling thread */
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if (!IS_ERR_OR_NULL(rx->task)) {
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kthread_stop(rx->task);
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rx->task = NULL;
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/* Put the ir ptr that ir_probe() gave to the rx poll thread */
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put_ir_device(rx->ir, ir_devices_lock_held);
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}
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}
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static void release_ir_rx(struct kref *ref)
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{
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struct IR_rx *rx = container_of(ref, struct IR_rx, ref);
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struct IR *ir = rx->ir;
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/*
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* This release function can't do all the work, as we want
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* to keep the rx_ref_lock a spinlock, and killing the poll thread
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* and releasing the ir reference can cause a sleep. That work is
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* performed by put_ir_rx()
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*/
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ir->l.features &= ~LIRC_CAN_REC_LIRCCODE;
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/* Don't put_ir_device(rx->ir) here; lock can't be freed yet */
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ir->rx = NULL;
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/* Don't do the kfree(rx) here; we still need to kill the poll thread */
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return;
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}
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static int put_ir_rx(struct IR_rx *rx, bool ir_devices_lock_held)
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{
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int released;
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struct IR *ir = rx->ir;
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spin_lock(&ir->rx_ref_lock);
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released = kref_put(&rx->ref, release_ir_rx);
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spin_unlock(&ir->rx_ref_lock);
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/* Destroy the rx kthread while not holding the spinlock */
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if (released) {
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destroy_rx_kthread(rx, ir_devices_lock_held);
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kfree(rx);
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/* Make sure we're not still in a poll_table somewhere */
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wake_up_interruptible(&ir->rbuf.wait_poll);
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}
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/* Do a reference put() for the rx->ir reference, if we released rx */
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if (released)
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put_ir_device(ir, ir_devices_lock_held);
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return released;
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}
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/* struct IR_tx reference counting */
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static struct IR_tx *get_ir_tx(struct IR *ir)
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{
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struct IR_tx *tx;
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spin_lock(&ir->tx_ref_lock);
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tx = ir->tx;
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if (tx != NULL)
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kref_get(&tx->ref);
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spin_unlock(&ir->tx_ref_lock);
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return tx;
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}
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static void release_ir_tx(struct kref *ref)
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{
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struct IR_tx *tx = container_of(ref, struct IR_tx, ref);
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struct IR *ir = tx->ir;
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ir->l.features &= ~LIRC_CAN_SEND_PULSE;
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/* Don't put_ir_device(tx->ir) here, so our lock doesn't get freed */
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ir->tx = NULL;
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kfree(tx);
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}
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static int put_ir_tx(struct IR_tx *tx, bool ir_devices_lock_held)
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{
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int released;
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struct IR *ir = tx->ir;
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spin_lock(&ir->tx_ref_lock);
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released = kref_put(&tx->ref, release_ir_tx);
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spin_unlock(&ir->tx_ref_lock);
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/* Do a reference put() for the tx->ir reference, if we released tx */
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if (released)
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put_ir_device(ir, ir_devices_lock_held);
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return released;
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}
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static int add_to_buf(struct IR *ir)
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{
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__u16 code;
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unsigned char codes[2];
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unsigned char keybuf[6];
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int got_data = 0;
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int ret;
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int failures = 0;
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unsigned char sendbuf[1] = { 0 };
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struct lirc_buffer *rbuf = ir->l.rbuf;
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struct IR_rx *rx;
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struct IR_tx *tx;
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if (lirc_buffer_full(rbuf)) {
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dprintk("buffer overflow\n");
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return -EOVERFLOW;
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}
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rx = get_ir_rx(ir);
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if (rx == NULL)
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return -ENXIO;
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/* Ensure our rx->c i2c_client remains valid for the duration */
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mutex_lock(&rx->client_lock);
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if (rx->c == NULL) {
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mutex_unlock(&rx->client_lock);
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put_ir_rx(rx, false);
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return -ENXIO;
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}
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tx = get_ir_tx(ir);
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/*
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* service the device as long as it is returning
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* data and we have space
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*/
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do {
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if (kthread_should_stop()) {
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ret = -ENODATA;
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break;
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}
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/*
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* Lock i2c bus for the duration. RX/TX chips interfere so
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* this is worth it
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*/
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mutex_lock(&ir->ir_lock);
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if (kthread_should_stop()) {
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mutex_unlock(&ir->ir_lock);
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ret = -ENODATA;
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break;
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}
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/*
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* Send random "poll command" (?) Windows driver does this
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* and it is a good point to detect chip failure.
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*/
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ret = i2c_master_send(rx->c, sendbuf, 1);
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if (ret != 1) {
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zilog_error("i2c_master_send failed with %d\n", ret);
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if (failures >= 3) {
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mutex_unlock(&ir->ir_lock);
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zilog_error("unable to read from the IR chip "
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"after 3 resets, giving up\n");
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break;
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}
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/* Looks like the chip crashed, reset it */
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zilog_error("polling the IR receiver chip failed, "
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"trying reset\n");
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set_current_state(TASK_UNINTERRUPTIBLE);
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if (kthread_should_stop()) {
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mutex_unlock(&ir->ir_lock);
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ret = -ENODATA;
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break;
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}
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schedule_timeout((100 * HZ + 999) / 1000);
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if (tx != NULL)
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tx->need_boot = 1;
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++failures;
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mutex_unlock(&ir->ir_lock);
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ret = 0;
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continue;
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}
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if (kthread_should_stop()) {
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mutex_unlock(&ir->ir_lock);
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ret = -ENODATA;
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break;
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}
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ret = i2c_master_recv(rx->c, keybuf, sizeof(keybuf));
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mutex_unlock(&ir->ir_lock);
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if (ret != sizeof(keybuf)) {
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zilog_error("i2c_master_recv failed with %d -- "
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"keeping last read buffer\n", ret);
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} else {
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rx->b[0] = keybuf[3];
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rx->b[1] = keybuf[4];
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rx->b[2] = keybuf[5];
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dprintk("key (0x%02x/0x%02x)\n", rx->b[0], rx->b[1]);
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}
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/* key pressed ? */
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if (rx->hdpvr_data_fmt) {
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if (got_data && (keybuf[0] == 0x80)) {
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ret = 0;
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break;
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} else if (got_data && (keybuf[0] == 0x00)) {
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ret = -ENODATA;
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break;
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}
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} else if ((rx->b[0] & 0x80) == 0) {
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ret = got_data ? 0 : -ENODATA;
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break;
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}
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/* look what we have */
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code = (((__u16)rx->b[0] & 0x7f) << 6) | (rx->b[1] >> 2);
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codes[0] = (code >> 8) & 0xff;
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codes[1] = code & 0xff;
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/* return it */
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lirc_buffer_write(rbuf, codes);
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++got_data;
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ret = 0;
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} while (!lirc_buffer_full(rbuf));
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mutex_unlock(&rx->client_lock);
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if (tx != NULL)
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put_ir_tx(tx, false);
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put_ir_rx(rx, false);
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return ret;
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}
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/*
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* Main function of the polling thread -- from lirc_dev.
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* We don't fit the LIRC model at all anymore. This is horrible, but
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* basically we have a single RX/TX device with a nasty failure mode
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* that needs to be accounted for across the pair. lirc lets us provide
|
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* fops, but prevents us from using the internal polling, etc. if we do
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* so. Hence the replication. Might be neater to extend the LIRC model
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* to account for this but I'd think it's a very special case of seriously
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* messed up hardware.
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*/
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static int lirc_thread(void *arg)
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{
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struct IR *ir = arg;
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struct lirc_buffer *rbuf = ir->l.rbuf;
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dprintk("poll thread started\n");
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while (!kthread_should_stop()) {
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/* if device not opened, we can sleep half a second */
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if (atomic_read(&ir->open_count) == 0) {
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schedule_timeout(HZ/2);
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continue;
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}
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set_current_state(TASK_INTERRUPTIBLE);
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|
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/*
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* This is ~113*2 + 24 + jitter (2*repeat gap + code length).
|
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* We use this interval as the chip resets every time you poll
|
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* it (bad!). This is therefore just sufficient to catch all
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* of the button presses. It makes the remote much more
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* responsive. You can see the difference by running irw and
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* holding down a button. With 100ms, the old polling
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* interval, you'll notice breaks in the repeat sequence
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* corresponding to lost keypresses.
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*/
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schedule_timeout((260 * HZ) / 1000);
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if (kthread_should_stop())
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break;
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if (!add_to_buf(ir))
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wake_up_interruptible(&rbuf->wait_poll);
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}
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|
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dprintk("poll thread ended\n");
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return 0;
|
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}
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|
|
static int set_use_inc(void *data)
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{
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return 0;
|
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}
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|
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static void set_use_dec(void *data)
|
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{
|
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return;
|
|
}
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|
|
|
/* safe read of a uint32 (always network byte order) */
|
|
static int read_uint32(unsigned char **data,
|
|
unsigned char *endp, unsigned int *val)
|
|
{
|
|
if (*data + 4 > endp)
|
|
return 0;
|
|
*val = ((*data)[0] << 24) | ((*data)[1] << 16) |
|
|
((*data)[2] << 8) | (*data)[3];
|
|
*data += 4;
|
|
return 1;
|
|
}
|
|
|
|
/* safe read of a uint8 */
|
|
static int read_uint8(unsigned char **data,
|
|
unsigned char *endp, unsigned char *val)
|
|
{
|
|
if (*data + 1 > endp)
|
|
return 0;
|
|
*val = *((*data)++);
|
|
return 1;
|
|
}
|
|
|
|
/* safe skipping of N bytes */
|
|
static int skip(unsigned char **data,
|
|
unsigned char *endp, unsigned int distance)
|
|
{
|
|
if (*data + distance > endp)
|
|
return 0;
|
|
*data += distance;
|
|
return 1;
|
|
}
|
|
|
|
/* decompress key data into the given buffer */
|
|
static int get_key_data(unsigned char *buf,
|
|
unsigned int codeset, unsigned int key)
|
|
{
|
|
unsigned char *data, *endp, *diffs, *key_block;
|
|
unsigned char keys, ndiffs, id;
|
|
unsigned int base, lim, pos, i;
|
|
|
|
/* Binary search for the codeset */
|
|
for (base = 0, lim = tx_data->num_code_sets; lim; lim >>= 1) {
|
|
pos = base + (lim >> 1);
|
|
data = tx_data->code_sets[pos];
|
|
|
|
if (!read_uint32(&data, tx_data->endp, &i))
|
|
goto corrupt;
|
|
|
|
if (i == codeset)
|
|
break;
|
|
else if (codeset > i) {
|
|
base = pos + 1;
|
|
--lim;
|
|
}
|
|
}
|
|
/* Not found? */
|
|
if (!lim)
|
|
return -EPROTO;
|
|
|
|
/* Set end of data block */
|
|
endp = pos < tx_data->num_code_sets - 1 ?
|
|
tx_data->code_sets[pos + 1] : tx_data->endp;
|
|
|
|
/* Read the block header */
|
|
if (!read_uint8(&data, endp, &keys) ||
|
|
!read_uint8(&data, endp, &ndiffs) ||
|
|
ndiffs > TX_BLOCK_SIZE || keys == 0)
|
|
goto corrupt;
|
|
|
|
/* Save diffs & skip */
|
|
diffs = data;
|
|
if (!skip(&data, endp, ndiffs))
|
|
goto corrupt;
|
|
|
|
/* Read the id of the first key */
|
|
if (!read_uint8(&data, endp, &id))
|
|
goto corrupt;
|
|
|
|
/* Unpack the first key's data */
|
|
for (i = 0; i < TX_BLOCK_SIZE; ++i) {
|
|
if (tx_data->fixed[i] == -1) {
|
|
if (!read_uint8(&data, endp, &buf[i]))
|
|
goto corrupt;
|
|
} else {
|
|
buf[i] = (unsigned char)tx_data->fixed[i];
|
|
}
|
|
}
|
|
|
|
/* Early out key found/not found */
|
|
if (key == id)
|
|
return 0;
|
|
if (keys == 1)
|
|
return -EPROTO;
|
|
|
|
/* Sanity check */
|
|
key_block = data;
|
|
if (!skip(&data, endp, (keys - 1) * (ndiffs + 1)))
|
|
goto corrupt;
|
|
|
|
/* Binary search for the key */
|
|
for (base = 0, lim = keys - 1; lim; lim >>= 1) {
|
|
/* Seek to block */
|
|
unsigned char *key_data;
|
|
pos = base + (lim >> 1);
|
|
key_data = key_block + (ndiffs + 1) * pos;
|
|
|
|
if (*key_data == key) {
|
|
/* skip key id */
|
|
++key_data;
|
|
|
|
/* found, so unpack the diffs */
|
|
for (i = 0; i < ndiffs; ++i) {
|
|
unsigned char val;
|
|
if (!read_uint8(&key_data, endp, &val) ||
|
|
diffs[i] >= TX_BLOCK_SIZE)
|
|
goto corrupt;
|
|
buf[diffs[i]] = val;
|
|
}
|
|
|
|
return 0;
|
|
} else if (key > *key_data) {
|
|
base = pos + 1;
|
|
--lim;
|
|
}
|
|
}
|
|
/* Key not found */
|
|
return -EPROTO;
|
|
|
|
corrupt:
|
|
zilog_error("firmware is corrupt\n");
|
|
return -EFAULT;
|
|
}
|
|
|
|
/* send a block of data to the IR TX device */
|
|
static int send_data_block(struct IR_tx *tx, unsigned char *data_block)
|
|
{
|
|
int i, j, ret;
|
|
unsigned char buf[5];
|
|
|
|
for (i = 0; i < TX_BLOCK_SIZE;) {
|
|
int tosend = TX_BLOCK_SIZE - i;
|
|
if (tosend > 4)
|
|
tosend = 4;
|
|
buf[0] = (unsigned char)(i + 1);
|
|
for (j = 0; j < tosend; ++j)
|
|
buf[1 + j] = data_block[i + j];
|
|
dprintk("%02x %02x %02x %02x %02x",
|
|
buf[0], buf[1], buf[2], buf[3], buf[4]);
|
|
ret = i2c_master_send(tx->c, buf, tosend + 1);
|
|
if (ret != tosend + 1) {
|
|
zilog_error("i2c_master_send failed with %d\n", ret);
|
|
return ret < 0 ? ret : -EFAULT;
|
|
}
|
|
i += tosend;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/* send boot data to the IR TX device */
|
|
static int send_boot_data(struct IR_tx *tx)
|
|
{
|
|
int ret, i;
|
|
unsigned char buf[4];
|
|
|
|
/* send the boot block */
|
|
ret = send_data_block(tx, tx_data->boot_data);
|
|
if (ret != 0)
|
|
return ret;
|
|
|
|
/* Hit the go button to activate the new boot data */
|
|
buf[0] = 0x00;
|
|
buf[1] = 0x20;
|
|
ret = i2c_master_send(tx->c, buf, 2);
|
|
if (ret != 2) {
|
|
zilog_error("i2c_master_send failed with %d\n", ret);
|
|
return ret < 0 ? ret : -EFAULT;
|
|
}
|
|
|
|
/*
|
|
* Wait for zilog to settle after hitting go post boot block upload.
|
|
* Without this delay, the HD-PVR and HVR-1950 both return an -EIO
|
|
* upon attempting to get firmware revision, and tx probe thus fails.
|
|
*/
|
|
for (i = 0; i < 10; i++) {
|
|
ret = i2c_master_send(tx->c, buf, 1);
|
|
if (ret == 1)
|
|
break;
|
|
udelay(100);
|
|
}
|
|
|
|
if (ret != 1) {
|
|
zilog_error("i2c_master_send failed with %d\n", ret);
|
|
return ret < 0 ? ret : -EFAULT;
|
|
}
|
|
|
|
/* Here comes the firmware version... (hopefully) */
|
|
ret = i2c_master_recv(tx->c, buf, 4);
|
|
if (ret != 4) {
|
|
zilog_error("i2c_master_recv failed with %d\n", ret);
|
|
return 0;
|
|
}
|
|
if ((buf[0] != 0x80) && (buf[0] != 0xa0)) {
|
|
zilog_error("unexpected IR TX init response: %02x\n", buf[0]);
|
|
return 0;
|
|
}
|
|
zilog_notify("Zilog/Hauppauge IR blaster firmware version "
|
|
"%d.%d.%d loaded\n", buf[1], buf[2], buf[3]);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* unload "firmware", lock held */
|
|
static void fw_unload_locked(void)
|
|
{
|
|
if (tx_data) {
|
|
if (tx_data->code_sets)
|
|
vfree(tx_data->code_sets);
|
|
|
|
if (tx_data->datap)
|
|
vfree(tx_data->datap);
|
|
|
|
vfree(tx_data);
|
|
tx_data = NULL;
|
|
dprintk("successfully unloaded IR blaster firmware\n");
|
|
}
|
|
}
|
|
|
|
/* unload "firmware" for the IR TX device */
|
|
static void fw_unload(void)
|
|
{
|
|
mutex_lock(&tx_data_lock);
|
|
fw_unload_locked();
|
|
mutex_unlock(&tx_data_lock);
|
|
}
|
|
|
|
/* load "firmware" for the IR TX device */
|
|
static int fw_load(struct IR_tx *tx)
|
|
{
|
|
int ret;
|
|
unsigned int i;
|
|
unsigned char *data, version, num_global_fixed;
|
|
const struct firmware *fw_entry;
|
|
|
|
/* Already loaded? */
|
|
mutex_lock(&tx_data_lock);
|
|
if (tx_data) {
|
|
ret = 0;
|
|
goto out;
|
|
}
|
|
|
|
/* Request codeset data file */
|
|
ret = request_firmware(&fw_entry, "haup-ir-blaster.bin", tx->ir->l.dev);
|
|
if (ret != 0) {
|
|
zilog_error("firmware haup-ir-blaster.bin not available "
|
|
"(%d)\n", ret);
|
|
ret = ret < 0 ? ret : -EFAULT;
|
|
goto out;
|
|
}
|
|
dprintk("firmware of size %zu loaded\n", fw_entry->size);
|
|
|
|
/* Parse the file */
|
|
tx_data = vmalloc(sizeof(*tx_data));
|
|
if (tx_data == NULL) {
|
|
zilog_error("out of memory\n");
|
|
release_firmware(fw_entry);
|
|
ret = -ENOMEM;
|
|
goto out;
|
|
}
|
|
tx_data->code_sets = NULL;
|
|
|
|
/* Copy the data so hotplug doesn't get confused and timeout */
|
|
tx_data->datap = vmalloc(fw_entry->size);
|
|
if (tx_data->datap == NULL) {
|
|
zilog_error("out of memory\n");
|
|
release_firmware(fw_entry);
|
|
vfree(tx_data);
|
|
ret = -ENOMEM;
|
|
goto out;
|
|
}
|
|
memcpy(tx_data->datap, fw_entry->data, fw_entry->size);
|
|
tx_data->endp = tx_data->datap + fw_entry->size;
|
|
release_firmware(fw_entry); fw_entry = NULL;
|
|
|
|
/* Check version */
|
|
data = tx_data->datap;
|
|
if (!read_uint8(&data, tx_data->endp, &version))
|
|
goto corrupt;
|
|
if (version != 1) {
|
|
zilog_error("unsupported code set file version (%u, expected"
|
|
"1) -- please upgrade to a newer driver",
|
|
version);
|
|
fw_unload_locked();
|
|
ret = -EFAULT;
|
|
goto out;
|
|
}
|
|
|
|
/* Save boot block for later */
|
|
tx_data->boot_data = data;
|
|
if (!skip(&data, tx_data->endp, TX_BLOCK_SIZE))
|
|
goto corrupt;
|
|
|
|
if (!read_uint32(&data, tx_data->endp,
|
|
&tx_data->num_code_sets))
|
|
goto corrupt;
|
|
|
|
dprintk("%u IR blaster codesets loaded\n", tx_data->num_code_sets);
|
|
|
|
tx_data->code_sets = vmalloc(
|
|
tx_data->num_code_sets * sizeof(char *));
|
|
if (tx_data->code_sets == NULL) {
|
|
fw_unload_locked();
|
|
ret = -ENOMEM;
|
|
goto out;
|
|
}
|
|
|
|
for (i = 0; i < TX_BLOCK_SIZE; ++i)
|
|
tx_data->fixed[i] = -1;
|
|
|
|
/* Read global fixed data template */
|
|
if (!read_uint8(&data, tx_data->endp, &num_global_fixed) ||
|
|
num_global_fixed > TX_BLOCK_SIZE)
|
|
goto corrupt;
|
|
for (i = 0; i < num_global_fixed; ++i) {
|
|
unsigned char pos, val;
|
|
if (!read_uint8(&data, tx_data->endp, &pos) ||
|
|
!read_uint8(&data, tx_data->endp, &val) ||
|
|
pos >= TX_BLOCK_SIZE)
|
|
goto corrupt;
|
|
tx_data->fixed[pos] = (int)val;
|
|
}
|
|
|
|
/* Filch out the position of each code set */
|
|
for (i = 0; i < tx_data->num_code_sets; ++i) {
|
|
unsigned int id;
|
|
unsigned char keys;
|
|
unsigned char ndiffs;
|
|
|
|
/* Save the codeset position */
|
|
tx_data->code_sets[i] = data;
|
|
|
|
/* Read header */
|
|
if (!read_uint32(&data, tx_data->endp, &id) ||
|
|
!read_uint8(&data, tx_data->endp, &keys) ||
|
|
!read_uint8(&data, tx_data->endp, &ndiffs) ||
|
|
ndiffs > TX_BLOCK_SIZE || keys == 0)
|
|
goto corrupt;
|
|
|
|
/* skip diff positions */
|
|
if (!skip(&data, tx_data->endp, ndiffs))
|
|
goto corrupt;
|
|
|
|
/*
|
|
* After the diffs we have the first key id + data -
|
|
* global fixed
|
|
*/
|
|
if (!skip(&data, tx_data->endp,
|
|
1 + TX_BLOCK_SIZE - num_global_fixed))
|
|
goto corrupt;
|
|
|
|
/* Then we have keys-1 blocks of key id+diffs */
|
|
if (!skip(&data, tx_data->endp,
|
|
(ndiffs + 1) * (keys - 1)))
|
|
goto corrupt;
|
|
}
|
|
ret = 0;
|
|
goto out;
|
|
|
|
corrupt:
|
|
zilog_error("firmware is corrupt\n");
|
|
fw_unload_locked();
|
|
ret = -EFAULT;
|
|
|
|
out:
|
|
mutex_unlock(&tx_data_lock);
|
|
return ret;
|
|
}
|
|
|
|
/* copied from lirc_dev */
|
|
static ssize_t read(struct file *filep, char *outbuf, size_t n, loff_t *ppos)
|
|
{
|
|
struct IR *ir = filep->private_data;
|
|
struct IR_rx *rx;
|
|
struct lirc_buffer *rbuf = ir->l.rbuf;
|
|
int ret = 0, written = 0, retries = 0;
|
|
unsigned int m;
|
|
DECLARE_WAITQUEUE(wait, current);
|
|
|
|
dprintk("read called\n");
|
|
if (n % rbuf->chunk_size) {
|
|
dprintk("read result = -EINVAL\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
rx = get_ir_rx(ir);
|
|
if (rx == NULL)
|
|
return -ENXIO;
|
|
|
|
/*
|
|
* we add ourselves to the task queue before buffer check
|
|
* to avoid losing scan code (in case when queue is awaken somewhere
|
|
* between while condition checking and scheduling)
|
|
*/
|
|
add_wait_queue(&rbuf->wait_poll, &wait);
|
|
set_current_state(TASK_INTERRUPTIBLE);
|
|
|
|
/*
|
|
* while we didn't provide 'length' bytes, device is opened in blocking
|
|
* mode and 'copy_to_user' is happy, wait for data.
|
|
*/
|
|
while (written < n && ret == 0) {
|
|
if (lirc_buffer_empty(rbuf)) {
|
|
/*
|
|
* According to the read(2) man page, 'written' can be
|
|
* returned as less than 'n', instead of blocking
|
|
* again, returning -EWOULDBLOCK, or returning
|
|
* -ERESTARTSYS
|
|
*/
|
|
if (written)
|
|
break;
|
|
if (filep->f_flags & O_NONBLOCK) {
|
|
ret = -EWOULDBLOCK;
|
|
break;
|
|
}
|
|
if (signal_pending(current)) {
|
|
ret = -ERESTARTSYS;
|
|
break;
|
|
}
|
|
schedule();
|
|
set_current_state(TASK_INTERRUPTIBLE);
|
|
} else {
|
|
unsigned char buf[rbuf->chunk_size];
|
|
m = lirc_buffer_read(rbuf, buf);
|
|
if (m == rbuf->chunk_size) {
|
|
ret = copy_to_user((void *)outbuf+written, buf,
|
|
rbuf->chunk_size);
|
|
written += rbuf->chunk_size;
|
|
} else {
|
|
retries++;
|
|
}
|
|
if (retries >= 5) {
|
|
zilog_error("Buffer read failed!\n");
|
|
ret = -EIO;
|
|
}
|
|
}
|
|
}
|
|
|
|
remove_wait_queue(&rbuf->wait_poll, &wait);
|
|
put_ir_rx(rx, false);
|
|
set_current_state(TASK_RUNNING);
|
|
|
|
dprintk("read result = %d (%s)\n", ret, ret ? "Error" : "OK");
|
|
|
|
return ret ? ret : written;
|
|
}
|
|
|
|
/* send a keypress to the IR TX device */
|
|
static int send_code(struct IR_tx *tx, unsigned int code, unsigned int key)
|
|
{
|
|
unsigned char data_block[TX_BLOCK_SIZE];
|
|
unsigned char buf[2];
|
|
int i, ret;
|
|
|
|
/* Get data for the codeset/key */
|
|
ret = get_key_data(data_block, code, key);
|
|
|
|
if (ret == -EPROTO) {
|
|
zilog_error("failed to get data for code %u, key %u -- check "
|
|
"lircd.conf entries\n", code, key);
|
|
return ret;
|
|
} else if (ret != 0)
|
|
return ret;
|
|
|
|
/* Send the data block */
|
|
ret = send_data_block(tx, data_block);
|
|
if (ret != 0)
|
|
return ret;
|
|
|
|
/* Send data block length? */
|
|
buf[0] = 0x00;
|
|
buf[1] = 0x40;
|
|
ret = i2c_master_send(tx->c, buf, 2);
|
|
if (ret != 2) {
|
|
zilog_error("i2c_master_send failed with %d\n", ret);
|
|
return ret < 0 ? ret : -EFAULT;
|
|
}
|
|
|
|
/* Give the z8 a moment to process data block */
|
|
for (i = 0; i < 10; i++) {
|
|
ret = i2c_master_send(tx->c, buf, 1);
|
|
if (ret == 1)
|
|
break;
|
|
udelay(100);
|
|
}
|
|
|
|
if (ret != 1) {
|
|
zilog_error("i2c_master_send failed with %d\n", ret);
|
|
return ret < 0 ? ret : -EFAULT;
|
|
}
|
|
|
|
/* Send finished download? */
|
|
ret = i2c_master_recv(tx->c, buf, 1);
|
|
if (ret != 1) {
|
|
zilog_error("i2c_master_recv failed with %d\n", ret);
|
|
return ret < 0 ? ret : -EFAULT;
|
|
}
|
|
if (buf[0] != 0xA0) {
|
|
zilog_error("unexpected IR TX response #1: %02x\n",
|
|
buf[0]);
|
|
return -EFAULT;
|
|
}
|
|
|
|
/* Send prepare command? */
|
|
buf[0] = 0x00;
|
|
buf[1] = 0x80;
|
|
ret = i2c_master_send(tx->c, buf, 2);
|
|
if (ret != 2) {
|
|
zilog_error("i2c_master_send failed with %d\n", ret);
|
|
return ret < 0 ? ret : -EFAULT;
|
|
}
|
|
|
|
/*
|
|
* The sleep bits aren't necessary on the HD PVR, and in fact, the
|
|
* last i2c_master_recv always fails with a -5, so for now, we're
|
|
* going to skip this whole mess and say we're done on the HD PVR
|
|
*/
|
|
if (!tx->post_tx_ready_poll) {
|
|
dprintk("sent code %u, key %u\n", code, key);
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* This bit NAKs until the device is ready, so we retry it
|
|
* sleeping a bit each time. This seems to be what the windows
|
|
* driver does, approximately.
|
|
* Try for up to 1s.
|
|
*/
|
|
for (i = 0; i < 20; ++i) {
|
|
set_current_state(TASK_UNINTERRUPTIBLE);
|
|
schedule_timeout((50 * HZ + 999) / 1000);
|
|
ret = i2c_master_send(tx->c, buf, 1);
|
|
if (ret == 1)
|
|
break;
|
|
dprintk("NAK expected: i2c_master_send "
|
|
"failed with %d (try %d)\n", ret, i+1);
|
|
}
|
|
if (ret != 1) {
|
|
zilog_error("IR TX chip never got ready: last i2c_master_send "
|
|
"failed with %d\n", ret);
|
|
return ret < 0 ? ret : -EFAULT;
|
|
}
|
|
|
|
/* Seems to be an 'ok' response */
|
|
i = i2c_master_recv(tx->c, buf, 1);
|
|
if (i != 1) {
|
|
zilog_error("i2c_master_recv failed with %d\n", ret);
|
|
return -EFAULT;
|
|
}
|
|
if (buf[0] != 0x80) {
|
|
zilog_error("unexpected IR TX response #2: %02x\n", buf[0]);
|
|
return -EFAULT;
|
|
}
|
|
|
|
/* Oh good, it worked */
|
|
dprintk("sent code %u, key %u\n", code, key);
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Write a code to the device. We take in a 32-bit number (an int) and then
|
|
* decode this to a codeset/key index. The key data is then decompressed and
|
|
* sent to the device. We have a spin lock as per i2c documentation to prevent
|
|
* multiple concurrent sends which would probably cause the device to explode.
|
|
*/
|
|
static ssize_t write(struct file *filep, const char *buf, size_t n,
|
|
loff_t *ppos)
|
|
{
|
|
struct IR *ir = filep->private_data;
|
|
struct IR_tx *tx;
|
|
size_t i;
|
|
int failures = 0;
|
|
|
|
/* Validate user parameters */
|
|
if (n % sizeof(int))
|
|
return -EINVAL;
|
|
|
|
/* Get a struct IR_tx reference */
|
|
tx = get_ir_tx(ir);
|
|
if (tx == NULL)
|
|
return -ENXIO;
|
|
|
|
/* Ensure our tx->c i2c_client remains valid for the duration */
|
|
mutex_lock(&tx->client_lock);
|
|
if (tx->c == NULL) {
|
|
mutex_unlock(&tx->client_lock);
|
|
put_ir_tx(tx, false);
|
|
return -ENXIO;
|
|
}
|
|
|
|
/* Lock i2c bus for the duration */
|
|
mutex_lock(&ir->ir_lock);
|
|
|
|
/* Send each keypress */
|
|
for (i = 0; i < n;) {
|
|
int ret = 0;
|
|
int command;
|
|
|
|
if (copy_from_user(&command, buf + i, sizeof(command))) {
|
|
mutex_unlock(&ir->ir_lock);
|
|
mutex_unlock(&tx->client_lock);
|
|
put_ir_tx(tx, false);
|
|
return -EFAULT;
|
|
}
|
|
|
|
/* Send boot data first if required */
|
|
if (tx->need_boot == 1) {
|
|
/* Make sure we have the 'firmware' loaded, first */
|
|
ret = fw_load(tx);
|
|
if (ret != 0) {
|
|
mutex_unlock(&ir->ir_lock);
|
|
mutex_unlock(&tx->client_lock);
|
|
put_ir_tx(tx, false);
|
|
if (ret != -ENOMEM)
|
|
ret = -EIO;
|
|
return ret;
|
|
}
|
|
/* Prep the chip for transmitting codes */
|
|
ret = send_boot_data(tx);
|
|
if (ret == 0)
|
|
tx->need_boot = 0;
|
|
}
|
|
|
|
/* Send the code */
|
|
if (ret == 0) {
|
|
ret = send_code(tx, (unsigned)command >> 16,
|
|
(unsigned)command & 0xFFFF);
|
|
if (ret == -EPROTO) {
|
|
mutex_unlock(&ir->ir_lock);
|
|
mutex_unlock(&tx->client_lock);
|
|
put_ir_tx(tx, false);
|
|
return ret;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Hmm, a failure. If we've had a few then give up, otherwise
|
|
* try a reset
|
|
*/
|
|
if (ret != 0) {
|
|
/* Looks like the chip crashed, reset it */
|
|
zilog_error("sending to the IR transmitter chip "
|
|
"failed, trying reset\n");
|
|
|
|
if (failures >= 3) {
|
|
zilog_error("unable to send to the IR chip "
|
|
"after 3 resets, giving up\n");
|
|
mutex_unlock(&ir->ir_lock);
|
|
mutex_unlock(&tx->client_lock);
|
|
put_ir_tx(tx, false);
|
|
return ret;
|
|
}
|
|
set_current_state(TASK_UNINTERRUPTIBLE);
|
|
schedule_timeout((100 * HZ + 999) / 1000);
|
|
tx->need_boot = 1;
|
|
++failures;
|
|
} else
|
|
i += sizeof(int);
|
|
}
|
|
|
|
/* Release i2c bus */
|
|
mutex_unlock(&ir->ir_lock);
|
|
|
|
mutex_unlock(&tx->client_lock);
|
|
|
|
/* Give back our struct IR_tx reference */
|
|
put_ir_tx(tx, false);
|
|
|
|
/* All looks good */
|
|
return n;
|
|
}
|
|
|
|
/* copied from lirc_dev */
|
|
static unsigned int poll(struct file *filep, poll_table *wait)
|
|
{
|
|
struct IR *ir = filep->private_data;
|
|
struct IR_rx *rx;
|
|
struct lirc_buffer *rbuf = ir->l.rbuf;
|
|
unsigned int ret;
|
|
|
|
dprintk("poll called\n");
|
|
|
|
rx = get_ir_rx(ir);
|
|
if (rx == NULL) {
|
|
/*
|
|
* Revisit this, if our poll function ever reports writeable
|
|
* status for Tx
|
|
*/
|
|
dprintk("poll result = POLLERR\n");
|
|
return POLLERR;
|
|
}
|
|
|
|
/*
|
|
* Add our lirc_buffer's wait_queue to the poll_table. A wake up on
|
|
* that buffer's wait queue indicates we may have a new poll status.
|
|
*/
|
|
poll_wait(filep, &rbuf->wait_poll, wait);
|
|
|
|
/* Indicate what ops could happen immediately without blocking */
|
|
ret = lirc_buffer_empty(rbuf) ? 0 : (POLLIN|POLLRDNORM);
|
|
|
|
dprintk("poll result = %s\n", ret ? "POLLIN|POLLRDNORM" : "none");
|
|
return ret;
|
|
}
|
|
|
|
static long ioctl(struct file *filep, unsigned int cmd, unsigned long arg)
|
|
{
|
|
struct IR *ir = filep->private_data;
|
|
int result;
|
|
unsigned long mode, features;
|
|
|
|
features = ir->l.features;
|
|
|
|
switch (cmd) {
|
|
case LIRC_GET_LENGTH:
|
|
result = put_user((unsigned long)13,
|
|
(unsigned long *)arg);
|
|
break;
|
|
case LIRC_GET_FEATURES:
|
|
result = put_user(features, (unsigned long *) arg);
|
|
break;
|
|
case LIRC_GET_REC_MODE:
|
|
if (!(features&LIRC_CAN_REC_MASK))
|
|
return -ENOSYS;
|
|
|
|
result = put_user(LIRC_REC2MODE
|
|
(features&LIRC_CAN_REC_MASK),
|
|
(unsigned long *)arg);
|
|
break;
|
|
case LIRC_SET_REC_MODE:
|
|
if (!(features&LIRC_CAN_REC_MASK))
|
|
return -ENOSYS;
|
|
|
|
result = get_user(mode, (unsigned long *)arg);
|
|
if (!result && !(LIRC_MODE2REC(mode) & features))
|
|
result = -EINVAL;
|
|
break;
|
|
case LIRC_GET_SEND_MODE:
|
|
if (!(features&LIRC_CAN_SEND_MASK))
|
|
return -ENOSYS;
|
|
|
|
result = put_user(LIRC_MODE_PULSE, (unsigned long *) arg);
|
|
break;
|
|
case LIRC_SET_SEND_MODE:
|
|
if (!(features&LIRC_CAN_SEND_MASK))
|
|
return -ENOSYS;
|
|
|
|
result = get_user(mode, (unsigned long *) arg);
|
|
if (!result && mode != LIRC_MODE_PULSE)
|
|
return -EINVAL;
|
|
break;
|
|
default:
|
|
return -EINVAL;
|
|
}
|
|
return result;
|
|
}
|
|
|
|
static struct IR *get_ir_device_by_minor(unsigned int minor)
|
|
{
|
|
struct IR *ir;
|
|
struct IR *ret = NULL;
|
|
|
|
mutex_lock(&ir_devices_lock);
|
|
|
|
if (!list_empty(&ir_devices_list)) {
|
|
list_for_each_entry(ir, &ir_devices_list, list) {
|
|
if (ir->l.minor == minor) {
|
|
ret = get_ir_device(ir, true);
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
mutex_unlock(&ir_devices_lock);
|
|
return ret;
|
|
}
|
|
|
|
/*
|
|
* Open the IR device. Get hold of our IR structure and
|
|
* stash it in private_data for the file
|
|
*/
|
|
static int open(struct inode *node, struct file *filep)
|
|
{
|
|
struct IR *ir;
|
|
unsigned int minor = MINOR(node->i_rdev);
|
|
|
|
/* find our IR struct */
|
|
ir = get_ir_device_by_minor(minor);
|
|
|
|
if (ir == NULL)
|
|
return -ENODEV;
|
|
|
|
atomic_inc(&ir->open_count);
|
|
|
|
/* stash our IR struct */
|
|
filep->private_data = ir;
|
|
|
|
nonseekable_open(node, filep);
|
|
return 0;
|
|
}
|
|
|
|
/* Close the IR device */
|
|
static int close(struct inode *node, struct file *filep)
|
|
{
|
|
/* find our IR struct */
|
|
struct IR *ir = filep->private_data;
|
|
if (ir == NULL) {
|
|
zilog_error("close: no private_data attached to the file!\n");
|
|
return -ENODEV;
|
|
}
|
|
|
|
atomic_dec(&ir->open_count);
|
|
|
|
put_ir_device(ir, false);
|
|
return 0;
|
|
}
|
|
|
|
static int ir_remove(struct i2c_client *client);
|
|
static int ir_probe(struct i2c_client *client, const struct i2c_device_id *id);
|
|
|
|
#define ID_FLAG_TX 0x01
|
|
#define ID_FLAG_HDPVR 0x02
|
|
|
|
static const struct i2c_device_id ir_transceiver_id[] = {
|
|
{ "ir_tx_z8f0811_haup", ID_FLAG_TX },
|
|
{ "ir_rx_z8f0811_haup", 0 },
|
|
{ "ir_tx_z8f0811_hdpvr", ID_FLAG_HDPVR | ID_FLAG_TX },
|
|
{ "ir_rx_z8f0811_hdpvr", ID_FLAG_HDPVR },
|
|
{ }
|
|
};
|
|
|
|
static struct i2c_driver driver = {
|
|
.driver = {
|
|
.owner = THIS_MODULE,
|
|
.name = "Zilog/Hauppauge i2c IR",
|
|
},
|
|
.probe = ir_probe,
|
|
.remove = ir_remove,
|
|
.id_table = ir_transceiver_id,
|
|
};
|
|
|
|
static const struct file_operations lirc_fops = {
|
|
.owner = THIS_MODULE,
|
|
.llseek = no_llseek,
|
|
.read = read,
|
|
.write = write,
|
|
.poll = poll,
|
|
.unlocked_ioctl = ioctl,
|
|
#ifdef CONFIG_COMPAT
|
|
.compat_ioctl = ioctl,
|
|
#endif
|
|
.open = open,
|
|
.release = close
|
|
};
|
|
|
|
static struct lirc_driver lirc_template = {
|
|
.name = "lirc_zilog",
|
|
.minor = -1,
|
|
.code_length = 13,
|
|
.buffer_size = BUFLEN / 2,
|
|
.sample_rate = 0, /* tell lirc_dev to not start its own kthread */
|
|
.chunk_size = 2,
|
|
.set_use_inc = set_use_inc,
|
|
.set_use_dec = set_use_dec,
|
|
.fops = &lirc_fops,
|
|
.owner = THIS_MODULE,
|
|
};
|
|
|
|
static int ir_remove(struct i2c_client *client)
|
|
{
|
|
if (strncmp("ir_tx_z8", client->name, 8) == 0) {
|
|
struct IR_tx *tx = i2c_get_clientdata(client);
|
|
if (tx != NULL) {
|
|
mutex_lock(&tx->client_lock);
|
|
tx->c = NULL;
|
|
mutex_unlock(&tx->client_lock);
|
|
put_ir_tx(tx, false);
|
|
}
|
|
} else if (strncmp("ir_rx_z8", client->name, 8) == 0) {
|
|
struct IR_rx *rx = i2c_get_clientdata(client);
|
|
if (rx != NULL) {
|
|
mutex_lock(&rx->client_lock);
|
|
rx->c = NULL;
|
|
mutex_unlock(&rx->client_lock);
|
|
put_ir_rx(rx, false);
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
|
|
/* ir_devices_lock must be held */
|
|
static struct IR *get_ir_device_by_adapter(struct i2c_adapter *adapter)
|
|
{
|
|
struct IR *ir;
|
|
|
|
if (list_empty(&ir_devices_list))
|
|
return NULL;
|
|
|
|
list_for_each_entry(ir, &ir_devices_list, list)
|
|
if (ir->adapter == adapter) {
|
|
get_ir_device(ir, true);
|
|
return ir;
|
|
}
|
|
|
|
return NULL;
|
|
}
|
|
|
|
static int ir_probe(struct i2c_client *client, const struct i2c_device_id *id)
|
|
{
|
|
struct IR *ir;
|
|
struct IR_tx *tx;
|
|
struct IR_rx *rx;
|
|
struct i2c_adapter *adap = client->adapter;
|
|
int ret;
|
|
bool tx_probe = false;
|
|
|
|
dprintk("%s: %s on i2c-%d (%s), client addr=0x%02x\n",
|
|
__func__, id->name, adap->nr, adap->name, client->addr);
|
|
|
|
/*
|
|
* The IR receiver is at i2c address 0x71.
|
|
* The IR transmitter is at i2c address 0x70.
|
|
*/
|
|
|
|
if (id->driver_data & ID_FLAG_TX)
|
|
tx_probe = true;
|
|
else if (tx_only) /* module option */
|
|
return -ENXIO;
|
|
|
|
zilog_info("probing IR %s on %s (i2c-%d)\n",
|
|
tx_probe ? "Tx" : "Rx", adap->name, adap->nr);
|
|
|
|
mutex_lock(&ir_devices_lock);
|
|
|
|
/* Use a single struct IR instance for both the Rx and Tx functions */
|
|
ir = get_ir_device_by_adapter(adap);
|
|
if (ir == NULL) {
|
|
ir = kzalloc(sizeof(struct IR), GFP_KERNEL);
|
|
if (ir == NULL) {
|
|
ret = -ENOMEM;
|
|
goto out_no_ir;
|
|
}
|
|
kref_init(&ir->ref);
|
|
|
|
/* store for use in ir_probe() again, and open() later on */
|
|
INIT_LIST_HEAD(&ir->list);
|
|
list_add_tail(&ir->list, &ir_devices_list);
|
|
|
|
ir->adapter = adap;
|
|
mutex_init(&ir->ir_lock);
|
|
atomic_set(&ir->open_count, 0);
|
|
spin_lock_init(&ir->tx_ref_lock);
|
|
spin_lock_init(&ir->rx_ref_lock);
|
|
|
|
/* set lirc_dev stuff */
|
|
memcpy(&ir->l, &lirc_template, sizeof(struct lirc_driver));
|
|
/*
|
|
* FIXME this is a pointer reference to us, but no refcount.
|
|
*
|
|
* This OK for now, since lirc_dev currently won't touch this
|
|
* buffer as we provide our own lirc_fops.
|
|
*
|
|
* Currently our own lirc_fops rely on this ir->l.rbuf pointer
|
|
*/
|
|
ir->l.rbuf = &ir->rbuf;
|
|
ir->l.dev = &adap->dev;
|
|
ret = lirc_buffer_init(ir->l.rbuf,
|
|
ir->l.chunk_size, ir->l.buffer_size);
|
|
if (ret)
|
|
goto out_put_ir;
|
|
}
|
|
|
|
if (tx_probe) {
|
|
/* Get the IR_rx instance for later, if already allocated */
|
|
rx = get_ir_rx(ir);
|
|
|
|
/* Set up a struct IR_tx instance */
|
|
tx = kzalloc(sizeof(struct IR_tx), GFP_KERNEL);
|
|
if (tx == NULL) {
|
|
ret = -ENOMEM;
|
|
goto out_put_xx;
|
|
}
|
|
kref_init(&tx->ref);
|
|
ir->tx = tx;
|
|
|
|
ir->l.features |= LIRC_CAN_SEND_PULSE;
|
|
mutex_init(&tx->client_lock);
|
|
tx->c = client;
|
|
tx->need_boot = 1;
|
|
tx->post_tx_ready_poll =
|
|
(id->driver_data & ID_FLAG_HDPVR) ? false : true;
|
|
|
|
/* An ir ref goes to the struct IR_tx instance */
|
|
tx->ir = get_ir_device(ir, true);
|
|
|
|
/* A tx ref goes to the i2c_client */
|
|
i2c_set_clientdata(client, get_ir_tx(ir));
|
|
|
|
/*
|
|
* Load the 'firmware'. We do this before registering with
|
|
* lirc_dev, so the first firmware load attempt does not happen
|
|
* after a open() or write() call on the device.
|
|
*
|
|
* Failure here is not deemed catastrophic, so the receiver will
|
|
* still be usable. Firmware load will be retried in write(),
|
|
* if it is needed.
|
|
*/
|
|
fw_load(tx);
|
|
|
|
/* Proceed only if the Rx client is also ready or not needed */
|
|
if (rx == NULL && !tx_only) {
|
|
zilog_info("probe of IR Tx on %s (i2c-%d) done. Waiting"
|
|
" on IR Rx.\n", adap->name, adap->nr);
|
|
goto out_ok;
|
|
}
|
|
} else {
|
|
/* Get the IR_tx instance for later, if already allocated */
|
|
tx = get_ir_tx(ir);
|
|
|
|
/* Set up a struct IR_rx instance */
|
|
rx = kzalloc(sizeof(struct IR_rx), GFP_KERNEL);
|
|
if (rx == NULL) {
|
|
ret = -ENOMEM;
|
|
goto out_put_xx;
|
|
}
|
|
kref_init(&rx->ref);
|
|
ir->rx = rx;
|
|
|
|
ir->l.features |= LIRC_CAN_REC_LIRCCODE;
|
|
mutex_init(&rx->client_lock);
|
|
rx->c = client;
|
|
rx->hdpvr_data_fmt =
|
|
(id->driver_data & ID_FLAG_HDPVR) ? true : false;
|
|
|
|
/* An ir ref goes to the struct IR_rx instance */
|
|
rx->ir = get_ir_device(ir, true);
|
|
|
|
/* An rx ref goes to the i2c_client */
|
|
i2c_set_clientdata(client, get_ir_rx(ir));
|
|
|
|
/*
|
|
* Start the polling thread.
|
|
* It will only perform an empty loop around schedule_timeout()
|
|
* until we register with lirc_dev and the first user open()
|
|
*/
|
|
/* An ir ref goes to the new rx polling kthread */
|
|
rx->task = kthread_run(lirc_thread, get_ir_device(ir, true),
|
|
"zilog-rx-i2c-%d", adap->nr);
|
|
if (IS_ERR(rx->task)) {
|
|
ret = PTR_ERR(rx->task);
|
|
zilog_error("%s: could not start IR Rx polling thread"
|
|
"\n", __func__);
|
|
/* Failed kthread, so put back the ir ref */
|
|
put_ir_device(ir, true);
|
|
/* Failure exit, so put back rx ref from i2c_client */
|
|
i2c_set_clientdata(client, NULL);
|
|
put_ir_rx(rx, true);
|
|
ir->l.features &= ~LIRC_CAN_REC_LIRCCODE;
|
|
goto out_put_xx;
|
|
}
|
|
|
|
/* Proceed only if the Tx client is also ready */
|
|
if (tx == NULL) {
|
|
zilog_info("probe of IR Rx on %s (i2c-%d) done. Waiting"
|
|
" on IR Tx.\n", adap->name, adap->nr);
|
|
goto out_ok;
|
|
}
|
|
}
|
|
|
|
/* register with lirc */
|
|
ir->l.minor = minor; /* module option: user requested minor number */
|
|
ir->l.minor = lirc_register_driver(&ir->l);
|
|
if (ir->l.minor < 0 || ir->l.minor >= MAX_IRCTL_DEVICES) {
|
|
zilog_error("%s: \"minor\" must be between 0 and %d (%d)!\n",
|
|
__func__, MAX_IRCTL_DEVICES-1, ir->l.minor);
|
|
ret = -EBADRQC;
|
|
goto out_put_xx;
|
|
}
|
|
zilog_info("IR unit on %s (i2c-%d) registered as lirc%d and ready\n",
|
|
adap->name, adap->nr, ir->l.minor);
|
|
|
|
out_ok:
|
|
if (rx != NULL)
|
|
put_ir_rx(rx, true);
|
|
if (tx != NULL)
|
|
put_ir_tx(tx, true);
|
|
put_ir_device(ir, true);
|
|
zilog_info("probe of IR %s on %s (i2c-%d) done\n",
|
|
tx_probe ? "Tx" : "Rx", adap->name, adap->nr);
|
|
mutex_unlock(&ir_devices_lock);
|
|
return 0;
|
|
|
|
out_put_xx:
|
|
if (rx != NULL)
|
|
put_ir_rx(rx, true);
|
|
if (tx != NULL)
|
|
put_ir_tx(tx, true);
|
|
out_put_ir:
|
|
put_ir_device(ir, true);
|
|
out_no_ir:
|
|
zilog_error("%s: probing IR %s on %s (i2c-%d) failed with %d\n",
|
|
__func__, tx_probe ? "Tx" : "Rx", adap->name, adap->nr,
|
|
ret);
|
|
mutex_unlock(&ir_devices_lock);
|
|
return ret;
|
|
}
|
|
|
|
static int __init zilog_init(void)
|
|
{
|
|
int ret;
|
|
|
|
zilog_notify("Zilog/Hauppauge IR driver initializing\n");
|
|
|
|
mutex_init(&tx_data_lock);
|
|
|
|
request_module("firmware_class");
|
|
|
|
ret = i2c_add_driver(&driver);
|
|
if (ret)
|
|
zilog_error("initialization failed\n");
|
|
else
|
|
zilog_notify("initialization complete\n");
|
|
|
|
return ret;
|
|
}
|
|
|
|
static void __exit zilog_exit(void)
|
|
{
|
|
i2c_del_driver(&driver);
|
|
/* if loaded */
|
|
fw_unload();
|
|
zilog_notify("Zilog/Hauppauge IR driver unloaded\n");
|
|
}
|
|
|
|
module_init(zilog_init);
|
|
module_exit(zilog_exit);
|
|
|
|
MODULE_DESCRIPTION("Zilog/Hauppauge infrared transmitter driver (i2c stack)");
|
|
MODULE_AUTHOR("Gerd Knorr, Michal Kochanowicz, Christoph Bartelmus, "
|
|
"Ulrich Mueller, Stefan Jahn, Jerome Brock, Mark Weaver, "
|
|
"Andy Walls");
|
|
MODULE_LICENSE("GPL");
|
|
/* for compat with old name, which isn't all that accurate anymore */
|
|
MODULE_ALIAS("lirc_pvr150");
|
|
|
|
module_param(minor, int, 0444);
|
|
MODULE_PARM_DESC(minor, "Preferred minor device number");
|
|
|
|
module_param(debug, bool, 0644);
|
|
MODULE_PARM_DESC(debug, "Enable debugging messages");
|
|
|
|
module_param(tx_only, bool, 0644);
|
|
MODULE_PARM_DESC(tx_only, "Only handle the IR transmit function");
|