5766d204ae
Both the HD-PVR and HVR-1950, driven by the hdpvr and pvrusb2 drivers respectively, have a zilog z8 chip exposed via i2c. These are both usb-connected devices, and on both of them, back-to-back i2c_master_send calls that work fine with a z8 on a pci card fail with a -EIO, as the chip isn't yet ready from the prior command. To cope with that, add a delay and retry loop where necessary. Acked-by: Andy Walls <awalls@md.metrocast.net> Signed-off-by: Jarod Wilson <jarod@redhat.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
1481 lines
35 KiB
C
1481 lines
35 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_rx {
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/* RX device */
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struct i2c_client *c;
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/* RX device buffer & lock */
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struct lirc_buffer buf;
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struct mutex buf_lock;
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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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/* TX device */
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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 lirc_driver l;
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struct mutex ir_lock;
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int open;
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struct i2c_adapter *adapter;
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struct IR_rx *rx;
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struct IR_tx *tx;
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};
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/* Minor -> data mapping */
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static struct mutex ir_devices_lock;
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static struct IR *ir_devices[MAX_IRCTL_DEVICES];
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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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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 IR_rx *rx = ir->rx;
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if (rx == NULL)
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return -ENXIO;
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if (lirc_buffer_full(&rx->buf)) {
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dprintk("buffer overflow\n");
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return -EOVERFLOW;
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}
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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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return -ENODATA;
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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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return -ENODATA;
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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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return ret;
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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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return -ENODATA;
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}
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schedule_timeout((100 * HZ + 999) / 1000);
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ir->tx->need_boot = 1;
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++failures;
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mutex_unlock(&ir->ir_lock);
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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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return -ENODATA;
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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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return 0;
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else if (got_data && (keybuf[0] == 0x00))
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return -ENODATA;
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} else if ((rx->b[0] & 0x80) == 0)
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return got_data ? 0 : -ENODATA;
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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(&rx->buf, codes);
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++got_data;
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} while (!lirc_buffer_full(&rx->buf));
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return 0;
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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 IR_rx *rx = ir->rx;
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dprintk("poll thread started\n");
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while (!kthread_should_stop()) {
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set_current_state(TASK_INTERRUPTIBLE);
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/* if device not opened, we can sleep half a second */
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if (!ir->open) {
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schedule_timeout(HZ/2);
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continue;
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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(&rx->buf.wait_poll);
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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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struct IR *ir = data;
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if (ir->l.owner == NULL || try_module_get(ir->l.owner) == 0)
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return -ENODEV;
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/* lock bttv in memory while /dev/lirc is in use */
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/*
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* this is completely broken code. lirc_unregister_driver()
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* must be possible even when the device is open
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*/
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if (ir->rx != NULL)
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i2c_use_client(ir->rx->c);
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if (ir->tx != NULL)
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i2c_use_client(ir->tx->c);
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return 0;
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}
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static void set_use_dec(void *data)
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{
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struct IR *ir = data;
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if (ir->rx)
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i2c_release_client(ir->rx->c);
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if (ir->tx)
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i2c_release_client(ir->tx->c);
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if (ir->l.owner != NULL)
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module_put(ir->l.owner);
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}
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/* safe read of a uint32 (always network byte order) */
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static int read_uint32(unsigned char **data,
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unsigned char *endp, unsigned int *val)
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{
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if (*data + 4 > endp)
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return 0;
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*val = ((*data)[0] << 24) | ((*data)[1] << 16) |
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((*data)[2] << 8) | (*data)[3];
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*data += 4;
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return 1;
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}
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/* safe read of a uint8 */
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static int read_uint8(unsigned char **data,
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unsigned char *endp, unsigned char *val)
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{
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if (*data + 1 > endp)
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return 0;
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*val = *((*data)++);
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return 1;
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}
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/* safe skipping of N bytes */
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static int skip(unsigned char **data,
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unsigned char *endp, unsigned int distance)
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{
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if (*data + distance > endp)
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return 0;
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*data += distance;
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return 1;
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}
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/* decompress key data into the given buffer */
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static int get_key_data(unsigned char *buf,
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unsigned int codeset, unsigned int key)
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{
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unsigned char *data, *endp, *diffs, *key_block;
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unsigned char keys, ndiffs, id;
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unsigned int base, lim, pos, i;
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/* Binary search for the codeset */
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for (base = 0, lim = tx_data->num_code_sets; lim; lim >>= 1) {
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pos = base + (lim >> 1);
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data = tx_data->code_sets[pos];
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if (!read_uint32(&data, tx_data->endp, &i))
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goto corrupt;
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if (i == codeset)
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break;
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else if (codeset > i) {
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base = pos + 1;
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--lim;
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}
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}
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/* Not found? */
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if (!lim)
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return -EPROTO;
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/* Set end of data block */
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endp = pos < tx_data->num_code_sets - 1 ?
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tx_data->code_sets[pos + 1] : tx_data->endp;
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/* Read the block header */
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if (!read_uint8(&data, endp, &keys) ||
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!read_uint8(&data, endp, &ndiffs) ||
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ndiffs > TX_BLOCK_SIZE || keys == 0)
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goto corrupt;
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/* Save diffs & skip */
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diffs = data;
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if (!skip(&data, endp, ndiffs))
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goto corrupt;
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/* Read the id of the first key */
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if (!read_uint8(&data, endp, &id))
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goto corrupt;
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/* Unpack the first key's data */
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for (i = 0; i < TX_BLOCK_SIZE; ++i) {
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if (tx_data->fixed[i] == -1) {
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if (!read_uint8(&data, endp, &buf[i]))
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goto corrupt;
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} else {
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buf[i] = (unsigned char)tx_data->fixed[i];
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}
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}
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/* Early out key found/not found */
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if (key == id)
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return 0;
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if (keys == 1)
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return -EPROTO;
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|
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/* Sanity check */
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key_block = data;
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if (!skip(&data, endp, (keys - 1) * (ndiffs + 1)))
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goto corrupt;
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|
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/* Binary search for the key */
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for (base = 0, lim = keys - 1; lim; lim >>= 1) {
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/* Seek to block */
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unsigned char *key_data;
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pos = base + (lim >> 1);
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key_data = key_block + (ndiffs + 1) * pos;
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if (*key_data == key) {
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/* skip key id */
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++key_data;
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/* found, so unpack the diffs */
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for (i = 0; i < ndiffs; ++i) {
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unsigned char val;
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if (!read_uint8(&key_data, endp, &val) ||
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diffs[i] >= TX_BLOCK_SIZE)
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goto corrupt;
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buf[diffs[i]] = val;
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}
|
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return 0;
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} else if (key > *key_data) {
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base = pos + 1;
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--lim;
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}
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}
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/* Key not found */
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return -EPROTO;
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|
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corrupt:
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zilog_error("firmware is corrupt\n");
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return -EFAULT;
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}
|
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|
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/* send a block of data to the IR TX device */
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static int send_data_block(struct IR_tx *tx, unsigned char *data_block)
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{
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int i, j, ret;
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unsigned char buf[5];
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|
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for (i = 0; i < TX_BLOCK_SIZE;) {
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int tosend = TX_BLOCK_SIZE - i;
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if (tosend > 4)
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tosend = 4;
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buf[0] = (unsigned char)(i + 1);
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for (j = 0; j < tosend; ++j)
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buf[1 + j] = data_block[i + j];
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dprintk("%02x %02x %02x %02x %02x",
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buf[0], buf[1], buf[2], buf[3], buf[4]);
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ret = i2c_master_send(tx->c, buf, tosend + 1);
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if (ret != tosend + 1) {
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zilog_error("i2c_master_send failed with %d\n", ret);
|
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return ret < 0 ? ret : -EFAULT;
|
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}
|
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i += tosend;
|
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}
|
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return 0;
|
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}
|
|
|
|
/* send boot data to the IR TX device */
|
|
static int send_boot_data(struct IR_tx *tx)
|
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{
|
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int ret, i;
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unsigned char buf[4];
|
|
|
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/* send the boot block */
|
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ret = send_data_block(tx, tx_data->boot_data);
|
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if (ret != 0)
|
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return ret;
|
|
|
|
/* Hit the go button to activate the new boot data */
|
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buf[0] = 0x00;
|
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buf[1] = 0x20;
|
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ret = i2c_master_send(tx->c, buf, 2);
|
|
if (ret != 2) {
|
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zilog_error("i2c_master_send failed with %d\n", ret);
|
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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->c->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;
|
|
}
|
|
|
|
/* initialise the IR TX device */
|
|
static int tx_init(struct IR_tx *tx)
|
|
{
|
|
int ret;
|
|
|
|
/* Load 'firmware' */
|
|
ret = fw_load(tx);
|
|
if (ret != 0)
|
|
return ret;
|
|
|
|
/* Send boot block */
|
|
ret = send_boot_data(tx);
|
|
if (ret != 0)
|
|
return ret;
|
|
tx->need_boot = 0;
|
|
|
|
/* Looks good */
|
|
return 0;
|
|
}
|
|
|
|
/* do nothing stub to make LIRC happy */
|
|
static loff_t lseek(struct file *filep, loff_t offset, int orig)
|
|
{
|
|
return -ESPIPE;
|
|
}
|
|
|
|
/* 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 = ir->rx;
|
|
int ret = 0, written = 0;
|
|
DECLARE_WAITQUEUE(wait, current);
|
|
|
|
dprintk("read called\n");
|
|
if (rx == NULL)
|
|
return -ENODEV;
|
|
|
|
if (mutex_lock_interruptible(&rx->buf_lock))
|
|
return -ERESTARTSYS;
|
|
|
|
if (n % rx->buf.chunk_size) {
|
|
dprintk("read result = -EINVAL\n");
|
|
mutex_unlock(&rx->buf_lock);
|
|
return -EINVAL;
|
|
}
|
|
|
|
/*
|
|
* 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(&rx->buf.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(&rx->buf)) {
|
|
/*
|
|
* 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[rx->buf.chunk_size];
|
|
lirc_buffer_read(&rx->buf, buf);
|
|
ret = copy_to_user((void *)outbuf+written, buf,
|
|
rx->buf.chunk_size);
|
|
written += rx->buf.chunk_size;
|
|
}
|
|
}
|
|
|
|
remove_wait_queue(&rx->buf.wait_poll, &wait);
|
|
set_current_state(TASK_RUNNING);
|
|
mutex_unlock(&rx->buf_lock);
|
|
|
|
dprintk("read result = %s (%d)\n",
|
|
ret ? "-EFAULT" : "OK", ret);
|
|
|
|
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 = ir->tx;
|
|
size_t i;
|
|
int failures = 0;
|
|
|
|
if (tx == NULL)
|
|
return -ENODEV;
|
|
|
|
/* Validate user parameters */
|
|
if (n % sizeof(int))
|
|
return -EINVAL;
|
|
|
|
/* 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);
|
|
return -EFAULT;
|
|
}
|
|
|
|
/* Send boot data first if required */
|
|
if (tx->need_boot == 1) {
|
|
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);
|
|
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);
|
|
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);
|
|
|
|
/* 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 = ir->rx;
|
|
unsigned int ret;
|
|
|
|
dprintk("poll called\n");
|
|
if (rx == NULL)
|
|
return -ENODEV;
|
|
|
|
mutex_lock(&rx->buf_lock);
|
|
|
|
poll_wait(filep, &rx->buf.wait_poll, wait);
|
|
|
|
dprintk("poll result = %s\n",
|
|
lirc_buffer_empty(&rx->buf) ? "0" : "POLLIN|POLLRDNORM");
|
|
|
|
ret = lirc_buffer_empty(&rx->buf) ? 0 : (POLLIN|POLLRDNORM);
|
|
|
|
mutex_unlock(&rx->buf_lock);
|
|
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 = 0;
|
|
|
|
features |= LIRC_CAN_SEND_PULSE;
|
|
if (ir->rx != NULL)
|
|
features |= LIRC_CAN_REC_LIRCCODE;
|
|
|
|
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:
|
|
result = put_user(LIRC_MODE_PULSE, (unsigned long *) arg);
|
|
break;
|
|
case LIRC_SET_SEND_MODE:
|
|
result = get_user(mode, (unsigned long *) arg);
|
|
if (!result && mode != LIRC_MODE_PULSE)
|
|
return -EINVAL;
|
|
break;
|
|
default:
|
|
return -EINVAL;
|
|
}
|
|
return result;
|
|
}
|
|
|
|
/* ir_devices_lock must be held */
|
|
static struct IR *find_ir_device_by_minor(unsigned int minor)
|
|
{
|
|
if (minor >= MAX_IRCTL_DEVICES)
|
|
return NULL;
|
|
|
|
return ir_devices[minor];
|
|
}
|
|
|
|
/*
|
|
* 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;
|
|
int ret;
|
|
unsigned int minor = MINOR(node->i_rdev);
|
|
|
|
/* find our IR struct */
|
|
mutex_lock(&ir_devices_lock);
|
|
ir = find_ir_device_by_minor(minor);
|
|
mutex_unlock(&ir_devices_lock);
|
|
|
|
if (ir == NULL)
|
|
return -ENODEV;
|
|
|
|
/* increment in use count */
|
|
mutex_lock(&ir->ir_lock);
|
|
++ir->open;
|
|
ret = set_use_inc(ir);
|
|
if (ret != 0) {
|
|
--ir->open;
|
|
mutex_unlock(&ir->ir_lock);
|
|
return ret;
|
|
}
|
|
mutex_unlock(&ir->ir_lock);
|
|
|
|
/* stash our IR struct */
|
|
filep->private_data = ir;
|
|
|
|
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;
|
|
}
|
|
|
|
/* decrement in use count */
|
|
mutex_lock(&ir->ir_lock);
|
|
--ir->open;
|
|
set_use_dec(ir);
|
|
mutex_unlock(&ir->ir_lock);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static struct lirc_driver lirc_template = {
|
|
.name = "lirc_zilog",
|
|
.set_use_inc = set_use_inc,
|
|
.set_use_dec = set_use_dec,
|
|
.owner = THIS_MODULE
|
|
};
|
|
|
|
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 = lseek,
|
|
.read = read,
|
|
.write = write,
|
|
.poll = poll,
|
|
.unlocked_ioctl = ioctl,
|
|
#ifdef CONFIG_COMPAT
|
|
.compat_ioctl = ioctl,
|
|
#endif
|
|
.open = open,
|
|
.release = close
|
|
};
|
|
|
|
static void destroy_rx_kthread(struct IR_rx *rx)
|
|
{
|
|
/* end up polling thread */
|
|
if (rx != NULL && !IS_ERR_OR_NULL(rx->task)) {
|
|
kthread_stop(rx->task);
|
|
rx->task = NULL;
|
|
}
|
|
}
|
|
|
|
/* ir_devices_lock must be held */
|
|
static int add_ir_device(struct IR *ir)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i < MAX_IRCTL_DEVICES; i++)
|
|
if (ir_devices[i] == NULL) {
|
|
ir_devices[i] = ir;
|
|
break;
|
|
}
|
|
|
|
return i == MAX_IRCTL_DEVICES ? -ENOMEM : i;
|
|
}
|
|
|
|
/* ir_devices_lock must be held */
|
|
static void del_ir_device(struct IR *ir)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i < MAX_IRCTL_DEVICES; i++)
|
|
if (ir_devices[i] == ir) {
|
|
ir_devices[i] = NULL;
|
|
break;
|
|
}
|
|
}
|
|
|
|
static int ir_remove(struct i2c_client *client)
|
|
{
|
|
struct IR *ir = i2c_get_clientdata(client);
|
|
|
|
mutex_lock(&ir_devices_lock);
|
|
|
|
if (ir == NULL) {
|
|
/* We destroyed everything when the first client came through */
|
|
mutex_unlock(&ir_devices_lock);
|
|
return 0;
|
|
}
|
|
|
|
/* Good-bye LIRC */
|
|
lirc_unregister_driver(ir->l.minor);
|
|
|
|
/* Good-bye Rx */
|
|
destroy_rx_kthread(ir->rx);
|
|
if (ir->rx != NULL) {
|
|
if (ir->rx->buf.fifo_initialized)
|
|
lirc_buffer_free(&ir->rx->buf);
|
|
i2c_set_clientdata(ir->rx->c, NULL);
|
|
kfree(ir->rx);
|
|
}
|
|
|
|
/* Good-bye Tx */
|
|
i2c_set_clientdata(ir->tx->c, NULL);
|
|
kfree(ir->tx);
|
|
|
|
/* Good-bye IR */
|
|
del_ir_device(ir);
|
|
kfree(ir);
|
|
|
|
mutex_unlock(&ir_devices_lock);
|
|
return 0;
|
|
}
|
|
|
|
|
|
/* ir_devices_lock must be held */
|
|
static struct IR *find_ir_device_by_adapter(struct i2c_adapter *adapter)
|
|
{
|
|
int i;
|
|
struct IR *ir = NULL;
|
|
|
|
for (i = 0; i < MAX_IRCTL_DEVICES; i++)
|
|
if (ir_devices[i] != NULL &&
|
|
ir_devices[i]->adapter == adapter) {
|
|
ir = ir_devices[i];
|
|
break;
|
|
}
|
|
|
|
return ir;
|
|
}
|
|
|
|
static int ir_probe(struct i2c_client *client, const struct i2c_device_id *id)
|
|
{
|
|
struct IR *ir;
|
|
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 = find_ir_device_by_adapter(adap);
|
|
if (ir == NULL) {
|
|
ir = kzalloc(sizeof(struct IR), GFP_KERNEL);
|
|
if (ir == NULL) {
|
|
ret = -ENOMEM;
|
|
goto out_no_ir;
|
|
}
|
|
/* store for use in ir_probe() again, and open() later on */
|
|
ret = add_ir_device(ir);
|
|
if (ret)
|
|
goto out_free_ir;
|
|
|
|
ir->adapter = adap;
|
|
mutex_init(&ir->ir_lock);
|
|
|
|
/* set lirc_dev stuff */
|
|
memcpy(&ir->l, &lirc_template, sizeof(struct lirc_driver));
|
|
ir->l.minor = minor; /* module option */
|
|
ir->l.code_length = 13;
|
|
ir->l.rbuf = NULL;
|
|
ir->l.fops = &lirc_fops;
|
|
ir->l.data = ir;
|
|
ir->l.dev = &adap->dev;
|
|
ir->l.sample_rate = 0;
|
|
}
|
|
|
|
if (tx_probe) {
|
|
/* Set up a struct IR_tx instance */
|
|
ir->tx = kzalloc(sizeof(struct IR_tx), GFP_KERNEL);
|
|
if (ir->tx == NULL) {
|
|
ret = -ENOMEM;
|
|
goto out_free_xx;
|
|
}
|
|
|
|
ir->tx->c = client;
|
|
ir->tx->need_boot = 1;
|
|
ir->tx->post_tx_ready_poll =
|
|
(id->driver_data & ID_FLAG_HDPVR) ? false : true;
|
|
} else {
|
|
/* Set up a struct IR_rx instance */
|
|
ir->rx = kzalloc(sizeof(struct IR_rx), GFP_KERNEL);
|
|
if (ir->rx == NULL) {
|
|
ret = -ENOMEM;
|
|
goto out_free_xx;
|
|
}
|
|
|
|
ret = lirc_buffer_init(&ir->rx->buf, 2, BUFLEN / 2);
|
|
if (ret)
|
|
goto out_free_xx;
|
|
|
|
mutex_init(&ir->rx->buf_lock);
|
|
ir->rx->c = client;
|
|
ir->rx->hdpvr_data_fmt =
|
|
(id->driver_data & ID_FLAG_HDPVR) ? true : false;
|
|
|
|
/* set lirc_dev stuff */
|
|
ir->l.rbuf = &ir->rx->buf;
|
|
}
|
|
|
|
i2c_set_clientdata(client, ir);
|
|
|
|
/* Proceed only if we have the required Tx and Rx clients ready to go */
|
|
if (ir->tx == NULL ||
|
|
(ir->rx == NULL && !tx_only)) {
|
|
zilog_info("probe of IR %s on %s (i2c-%d) done. Waiting on "
|
|
"IR %s.\n", tx_probe ? "Tx" : "Rx", adap->name,
|
|
adap->nr, tx_probe ? "Rx" : "Tx");
|
|
goto out_ok;
|
|
}
|
|
|
|
/* initialise RX device */
|
|
if (ir->rx != NULL) {
|
|
/* try to fire up polling thread */
|
|
ir->rx->task = kthread_run(lirc_thread, ir,
|
|
"zilog-rx-i2c-%d", adap->nr);
|
|
if (IS_ERR(ir->rx->task)) {
|
|
ret = PTR_ERR(ir->rx->task);
|
|
zilog_error("%s: could not start IR Rx polling thread"
|
|
"\n", __func__);
|
|
goto out_free_xx;
|
|
}
|
|
}
|
|
|
|
/* register with lirc */
|
|
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_free_thread;
|
|
}
|
|
|
|
/*
|
|
* if we have the tx device, load the 'firmware'. We do this
|
|
* after registering with lirc as otherwise hotplug seems to take
|
|
* 10s to create the lirc device.
|
|
*/
|
|
ret = tx_init(ir->tx);
|
|
if (ret != 0)
|
|
goto out_unregister;
|
|
|
|
zilog_info("probe of IR %s on %s (i2c-%d) done. IR unit ready.\n",
|
|
tx_probe ? "Tx" : "Rx", adap->name, adap->nr);
|
|
out_ok:
|
|
mutex_unlock(&ir_devices_lock);
|
|
return 0;
|
|
|
|
out_unregister:
|
|
lirc_unregister_driver(ir->l.minor);
|
|
out_free_thread:
|
|
destroy_rx_kthread(ir->rx);
|
|
out_free_xx:
|
|
if (ir->rx != NULL) {
|
|
if (ir->rx->buf.fifo_initialized)
|
|
lirc_buffer_free(&ir->rx->buf);
|
|
if (ir->rx->c != NULL)
|
|
i2c_set_clientdata(ir->rx->c, NULL);
|
|
kfree(ir->rx);
|
|
}
|
|
if (ir->tx != NULL) {
|
|
if (ir->tx->c != NULL)
|
|
i2c_set_clientdata(ir->tx->c, NULL);
|
|
kfree(ir->tx);
|
|
}
|
|
out_free_ir:
|
|
del_ir_device(ir);
|
|
kfree(ir);
|
|
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);
|
|
mutex_init(&ir_devices_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");
|