--- /dev/null
+/*
+ * i2c IR lirc driver for devices with zilog IR processors
+ *
+ * Copyright (c) 2000 Gerd Knorr <kraxel@goldbach.in-berlin.de>
+ * modified for PixelView (BT878P+W/FM) by
+ * Michal Kochanowicz <mkochano@pld.org.pl>
+ * Christoph Bartelmus <lirc@bartelmus.de>
+ * modified for KNC ONE TV Station/Anubis Typhoon TView Tuner by
+ * Ulrich Mueller <ulrich.mueller42@web.de>
+ * modified for Asus TV-Box and Creative/VisionTek BreakOut-Box by
+ * Stefan Jahn <stefan@lkcc.org>
+ * modified for inclusion into kernel sources by
+ * Jerome Brock <jbrock@users.sourceforge.net>
+ * modified for Leadtek Winfast PVR2000 by
+ * Thomas Reitmayr (treitmayr@yahoo.com)
+ * modified for Hauppauge PVR-150 IR TX device by
+ * Mark Weaver <mark@npsl.co.uk>
+ * changed name from lirc_pvr150 to lirc_zilog, works on more than pvr-150
+ * Jarod Wilson <jarod@redhat.com>
+ *
+ * parts are cut&pasted from the lirc_i2c.c driver
+ *
+ * Numerous changes updating lirc_zilog.c in kernel 2.6.38 and later are
+ * Copyright (C) 2011 Andy Walls <awalls@md.metrocast.net>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ *
+ */
+
+#include <linux/module.h>
+#include <linux/kmod.h>
+#include <linux/kernel.h>
+#include <linux/sched.h>
+#include <linux/fs.h>
+#include <linux/poll.h>
+#include <linux/string.h>
+#include <linux/timer.h>
+#include <linux/delay.h>
+#include <linux/completion.h>
+#include <linux/errno.h>
+#include <linux/slab.h>
+#include <linux/i2c.h>
+#include <linux/firmware.h>
+#include <linux/vmalloc.h>
+
+#include <linux/mutex.h>
+#include <linux/kthread.h>
+
+#include <media/lirc_dev.h>
+#include <media/lirc.h>
+
+/* Max transfer size done by I2C transfer functions */
+#define MAX_XFER_SIZE 64
+
+struct IR;
+
+struct IR_rx {
+ struct kref ref;
+ struct IR *ir;
+
+ /* RX device */
+ struct mutex client_lock;
+ struct i2c_client *c;
+
+ /* RX polling thread data */
+ struct task_struct *task;
+
+ /* RX read data */
+ unsigned char b[3];
+ bool hdpvr_data_fmt;
+};
+
+struct IR_tx {
+ struct kref ref;
+ struct IR *ir;
+
+ /* TX device */
+ struct mutex client_lock;
+ struct i2c_client *c;
+
+ /* TX additional actions needed */
+ int need_boot;
+ bool post_tx_ready_poll;
+};
+
+struct IR {
+ struct kref ref;
+ struct list_head list;
+
+ /* FIXME spinlock access to l.features */
+ struct lirc_driver l;
+ struct lirc_buffer rbuf;
+
+ struct mutex ir_lock;
+ atomic_t open_count;
+
+ struct i2c_adapter *adapter;
+
+ spinlock_t rx_ref_lock; /* struct IR_rx kref get()/put() */
+ struct IR_rx *rx;
+
+ spinlock_t tx_ref_lock; /* struct IR_tx kref get()/put() */
+ struct IR_tx *tx;
+};
+
+/* IR transceiver instance object list */
+/*
+ * This lock is used for the following:
+ * a. ir_devices_list access, insertions, deletions
+ * b. struct IR kref get()s and put()s
+ * c. serialization of ir_probe() for the two i2c_clients for a Z8
+ */
+static DEFINE_MUTEX(ir_devices_lock);
+static LIST_HEAD(ir_devices_list);
+
+/* Block size for IR transmitter */
+#define TX_BLOCK_SIZE 99
+
+/* Hauppauge IR transmitter data */
+struct tx_data_struct {
+ /* Boot block */
+ unsigned char *boot_data;
+
+ /* Start of binary data block */
+ unsigned char *datap;
+
+ /* End of binary data block */
+ unsigned char *endp;
+
+ /* Number of installed codesets */
+ unsigned int num_code_sets;
+
+ /* Pointers to codesets */
+ unsigned char **code_sets;
+
+ /* Global fixed data template */
+ int fixed[TX_BLOCK_SIZE];
+};
+
+static struct tx_data_struct *tx_data;
+static struct mutex tx_data_lock;
+
+
+/* module parameters */
+static bool debug; /* debug output */
+static bool tx_only; /* only handle the IR Tx function */
+static int minor = -1; /* minor number */
+
+
+/* struct IR reference counting */
+static struct IR *get_ir_device(struct IR *ir, bool ir_devices_lock_held)
+{
+ if (ir_devices_lock_held) {
+ kref_get(&ir->ref);
+ } else {
+ mutex_lock(&ir_devices_lock);
+ kref_get(&ir->ref);
+ mutex_unlock(&ir_devices_lock);
+ }
+ return ir;
+}
+
+static void release_ir_device(struct kref *ref)
+{
+ struct IR *ir = container_of(ref, struct IR, ref);
+
+ /*
+ * Things should be in this state by now:
+ * ir->rx set to NULL and deallocated - happens before ir->rx->ir put()
+ * ir->rx->task kthread stopped - happens before ir->rx->ir put()
+ * ir->tx set to NULL and deallocated - happens before ir->tx->ir put()
+ * ir->open_count == 0 - happens on final close()
+ * ir_lock, tx_ref_lock, rx_ref_lock, all released
+ */
+ if (ir->l.minor >= 0 && ir->l.minor < MAX_IRCTL_DEVICES) {
+ lirc_unregister_driver(ir->l.minor);
+ ir->l.minor = MAX_IRCTL_DEVICES;
+ }
+ if (kfifo_initialized(&ir->rbuf.fifo))
+ lirc_buffer_free(&ir->rbuf);
+ list_del(&ir->list);
+ kfree(ir);
+}
+
+static int put_ir_device(struct IR *ir, bool ir_devices_lock_held)
+{
+ int released;
+
+ if (ir_devices_lock_held)
+ return kref_put(&ir->ref, release_ir_device);
+
+ mutex_lock(&ir_devices_lock);
+ released = kref_put(&ir->ref, release_ir_device);
+ mutex_unlock(&ir_devices_lock);
+
+ return released;
+}
+
+/* struct IR_rx reference counting */
+static struct IR_rx *get_ir_rx(struct IR *ir)
+{
+ struct IR_rx *rx;
+
+ spin_lock(&ir->rx_ref_lock);
+ rx = ir->rx;
+ if (rx != NULL)
+ kref_get(&rx->ref);
+ spin_unlock(&ir->rx_ref_lock);
+ return rx;
+}
+
+static void destroy_rx_kthread(struct IR_rx *rx, bool ir_devices_lock_held)
+{
+ /* end up polling thread */
+ if (!IS_ERR_OR_NULL(rx->task)) {
+ kthread_stop(rx->task);
+ rx->task = NULL;
+ /* Put the ir ptr that ir_probe() gave to the rx poll thread */
+ put_ir_device(rx->ir, ir_devices_lock_held);
+ }
+}
+
+static void release_ir_rx(struct kref *ref)
+{
+ struct IR_rx *rx = container_of(ref, struct IR_rx, ref);
+ struct IR *ir = rx->ir;
+
+ /*
+ * This release function can't do all the work, as we want
+ * to keep the rx_ref_lock a spinlock, and killing the poll thread
+ * and releasing the ir reference can cause a sleep. That work is
+ * performed by put_ir_rx()
+ */
+ ir->l.features &= ~LIRC_CAN_REC_LIRCCODE;
+ /* Don't put_ir_device(rx->ir) here; lock can't be freed yet */
+ ir->rx = NULL;
+ /* Don't do the kfree(rx) here; we still need to kill the poll thread */
+}
+
+static int put_ir_rx(struct IR_rx *rx, bool ir_devices_lock_held)
+{
+ int released;
+ struct IR *ir = rx->ir;
+
+ spin_lock(&ir->rx_ref_lock);
+ released = kref_put(&rx->ref, release_ir_rx);
+ spin_unlock(&ir->rx_ref_lock);
+ /* Destroy the rx kthread while not holding the spinlock */
+ if (released) {
+ destroy_rx_kthread(rx, ir_devices_lock_held);
+ kfree(rx);
+ /* Make sure we're not still in a poll_table somewhere */
+ wake_up_interruptible(&ir->rbuf.wait_poll);
+ }
+ /* Do a reference put() for the rx->ir reference, if we released rx */
+ if (released)
+ put_ir_device(ir, ir_devices_lock_held);
+ return released;
+}
+
+/* struct IR_tx reference counting */
+static struct IR_tx *get_ir_tx(struct IR *ir)
+{
+ struct IR_tx *tx;
+
+ spin_lock(&ir->tx_ref_lock);
+ tx = ir->tx;
+ if (tx != NULL)
+ kref_get(&tx->ref);
+ spin_unlock(&ir->tx_ref_lock);
+ return tx;
+}
+
+static void release_ir_tx(struct kref *ref)
+{
+ struct IR_tx *tx = container_of(ref, struct IR_tx, ref);
+ struct IR *ir = tx->ir;
+
+ ir->l.features &= ~LIRC_CAN_SEND_PULSE;
+ /* Don't put_ir_device(tx->ir) here, so our lock doesn't get freed */
+ ir->tx = NULL;
+ kfree(tx);
+}
+
+static int put_ir_tx(struct IR_tx *tx, bool ir_devices_lock_held)
+{
+ int released;
+ struct IR *ir = tx->ir;
+
+ spin_lock(&ir->tx_ref_lock);
+ released = kref_put(&tx->ref, release_ir_tx);
+ spin_unlock(&ir->tx_ref_lock);
+ /* Do a reference put() for the tx->ir reference, if we released tx */
+ if (released)
+ put_ir_device(ir, ir_devices_lock_held);
+ return released;
+}
+
+static int add_to_buf(struct IR *ir)
+{
+ __u16 code;
+ unsigned char codes[2];
+ unsigned char keybuf[6];
+ int got_data = 0;
+ int ret;
+ int failures = 0;
+ unsigned char sendbuf[1] = { 0 };
+ struct lirc_buffer *rbuf = ir->l.rbuf;
+ struct IR_rx *rx;
+ struct IR_tx *tx;
+
+ if (lirc_buffer_full(rbuf)) {
+ dev_dbg(ir->l.dev, "buffer overflow\n");
+ return -EOVERFLOW;
+ }
+
+ rx = get_ir_rx(ir);
+ if (rx == NULL)
+ return -ENXIO;
+
+ /* Ensure our rx->c i2c_client remains valid for the duration */
+ mutex_lock(&rx->client_lock);
+ if (rx->c == NULL) {
+ mutex_unlock(&rx->client_lock);
+ put_ir_rx(rx, false);
+ return -ENXIO;
+ }
+
+ tx = get_ir_tx(ir);
+
+ /*
+ * service the device as long as it is returning
+ * data and we have space
+ */
+ do {
+ if (kthread_should_stop()) {
+ ret = -ENODATA;
+ break;
+ }
+
+ /*
+ * Lock i2c bus for the duration. RX/TX chips interfere so
+ * this is worth it
+ */
+ mutex_lock(&ir->ir_lock);
+
+ if (kthread_should_stop()) {
+ mutex_unlock(&ir->ir_lock);
+ ret = -ENODATA;
+ break;
+ }
+
+ /*
+ * Send random "poll command" (?) Windows driver does this
+ * and it is a good point to detect chip failure.
+ */
+ ret = i2c_master_send(rx->c, sendbuf, 1);
+ if (ret != 1) {
+ dev_err(ir->l.dev, "i2c_master_send failed with %d\n",
+ ret);
+ if (failures >= 3) {
+ mutex_unlock(&ir->ir_lock);
+ dev_err(ir->l.dev,
+ "unable to read from the IR chip after 3 resets, giving up\n");
+ break;
+ }
+
+ /* Looks like the chip crashed, reset it */
+ dev_err(ir->l.dev,
+ "polling the IR receiver chip failed, trying reset\n");
+
+ set_current_state(TASK_UNINTERRUPTIBLE);
+ if (kthread_should_stop()) {
+ mutex_unlock(&ir->ir_lock);
+ ret = -ENODATA;
+ break;
+ }
+ schedule_timeout((100 * HZ + 999) / 1000);
+ if (tx != NULL)
+ tx->need_boot = 1;
+
+ ++failures;
+ mutex_unlock(&ir->ir_lock);
+ ret = 0;
+ continue;
+ }
+
+ if (kthread_should_stop()) {
+ mutex_unlock(&ir->ir_lock);
+ ret = -ENODATA;
+ break;
+ }
+ ret = i2c_master_recv(rx->c, keybuf, sizeof(keybuf));
+ mutex_unlock(&ir->ir_lock);
+ if (ret != sizeof(keybuf)) {
+ dev_err(ir->l.dev,
+ "i2c_master_recv failed with %d -- keeping last read buffer\n",
+ ret);
+ } else {
+ rx->b[0] = keybuf[3];
+ rx->b[1] = keybuf[4];
+ rx->b[2] = keybuf[5];
+ dev_dbg(ir->l.dev,
+ "key (0x%02x/0x%02x)\n",
+ rx->b[0], rx->b[1]);
+ }
+
+ /* key pressed ? */
+ if (rx->hdpvr_data_fmt) {
+ if (got_data && (keybuf[0] == 0x80)) {
+ ret = 0;
+ break;
+ } else if (got_data && (keybuf[0] == 0x00)) {
+ ret = -ENODATA;
+ break;
+ }
+ } else if ((rx->b[0] & 0x80) == 0) {
+ ret = got_data ? 0 : -ENODATA;
+ break;
+ }
+
+ /* look what we have */
+ code = (((__u16)rx->b[0] & 0x7f) << 6) | (rx->b[1] >> 2);
+
+ codes[0] = (code >> 8) & 0xff;
+ codes[1] = code & 0xff;
+
+ /* return it */
+ lirc_buffer_write(rbuf, codes);
+ ++got_data;
+ ret = 0;
+ } while (!lirc_buffer_full(rbuf));
+
+ mutex_unlock(&rx->client_lock);
+ if (tx != NULL)
+ put_ir_tx(tx, false);
+ put_ir_rx(rx, false);
+ return ret;
+}
+
+/*
+ * Main function of the polling thread -- from lirc_dev.
+ * We don't fit the LIRC model at all anymore. This is horrible, but
+ * basically we have a single RX/TX device with a nasty failure mode
+ * that needs to be accounted for across the pair. lirc lets us provide
+ * fops, but prevents us from using the internal polling, etc. if we do
+ * so. Hence the replication. Might be neater to extend the LIRC model
+ * to account for this but I'd think it's a very special case of seriously
+ * messed up hardware.
+ */
+static int lirc_thread(void *arg)
+{
+ struct IR *ir = arg;
+ struct lirc_buffer *rbuf = ir->l.rbuf;
+
+ dev_dbg(ir->l.dev, "poll thread started\n");
+
+ while (!kthread_should_stop()) {
+ set_current_state(TASK_INTERRUPTIBLE);
+
+ /* if device not opened, we can sleep half a second */
+ if (atomic_read(&ir->open_count) == 0) {
+ schedule_timeout(HZ/2);
+ continue;
+ }
+
+ /*
+ * This is ~113*2 + 24 + jitter (2*repeat gap + code length).
+ * We use this interval as the chip resets every time you poll
+ * it (bad!). This is therefore just sufficient to catch all
+ * of the button presses. It makes the remote much more
+ * responsive. You can see the difference by running irw and
+ * holding down a button. With 100ms, the old polling
+ * interval, you'll notice breaks in the repeat sequence
+ * corresponding to lost keypresses.
+ */
+ schedule_timeout((260 * HZ) / 1000);
+ if (kthread_should_stop())
+ break;
+ if (!add_to_buf(ir))
+ wake_up_interruptible(&rbuf->wait_poll);
+ }
+
+ dev_dbg(ir->l.dev, "poll thread ended\n");
+ return 0;
+}
+
+static int set_use_inc(void *data)
+{
+ return 0;
+}
+
+static void set_use_dec(void *data)
+{
+}
+
+/* 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:
+ pr_err("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];
+ dev_dbg(tx->ir->l.dev, "%*ph", 5, buf);
+ ret = i2c_master_send(tx->c, buf, tosend + 1);
+ if (ret != tosend + 1) {
+ dev_err(tx->ir->l.dev,
+ "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) {
+ dev_err(tx->ir->l.dev, "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) {
+ dev_err(tx->ir->l.dev, "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) {
+ dev_err(tx->ir->l.dev, "i2c_master_recv failed with %d\n", ret);
+ return 0;
+ }
+ if ((buf[0] != 0x80) && (buf[0] != 0xa0)) {
+ dev_err(tx->ir->l.dev, "unexpected IR TX init response: %02x\n",
+ buf[0]);
+ return 0;
+ }
+ dev_notice(tx->ir->l.dev,
+ "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) {
+ vfree(tx_data->code_sets);
+
+ vfree(tx_data->datap);
+
+ vfree(tx_data);
+ tx_data = NULL;
+ pr_debug("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) {
+ dev_err(tx->ir->l.dev,
+ "firmware haup-ir-blaster.bin not available (%d)\n",
+ ret);
+ ret = ret < 0 ? ret : -EFAULT;
+ goto out;
+ }
+ dev_dbg(tx->ir->l.dev, "firmware of size %zu loaded\n", fw_entry->size);
+
+ /* Parse the file */
+ tx_data = vmalloc(sizeof(*tx_data));
+ if (tx_data == NULL) {
+ 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) {
+ 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) {
+ dev_err(tx->ir->l.dev,
+ "unsupported code set file version (%u, expected 1) -- please upgrade to a newer driver\n",
+ 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;
+
+ dev_dbg(tx->ir->l.dev, "%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:
+ dev_err(tx->ir->l.dev, "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 __user *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);
+
+ dev_dbg(ir->l.dev, "read called\n");
+ if (n % rbuf->chunk_size) {
+ dev_dbg(ir->l.dev, "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[MAX_XFER_SIZE];
+
+ if (rbuf->chunk_size > sizeof(buf)) {
+ dev_err(ir->l.dev,
+ "chunk_size is too big (%d)!\n",
+ rbuf->chunk_size);
+ ret = -EINVAL;
+ break;
+ }
+ m = lirc_buffer_read(rbuf, buf);
+ if (m == rbuf->chunk_size) {
+ ret = copy_to_user(outbuf + written, buf,
+ rbuf->chunk_size);
+ written += rbuf->chunk_size;
+ } else {
+ retries++;
+ }
+ if (retries >= 5) {
+ dev_err(ir->l.dev, "Buffer read failed!\n");
+ ret = -EIO;
+ }
+ }
+ }
+
+ remove_wait_queue(&rbuf->wait_poll, &wait);
+ put_ir_rx(rx, false);
+ set_current_state(TASK_RUNNING);
+
+ dev_dbg(ir->l.dev, "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) {
+ dev_err(tx->ir->l.dev,
+ "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) {
+ dev_err(tx->ir->l.dev, "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) {
+ dev_err(tx->ir->l.dev, "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) {
+ dev_err(tx->ir->l.dev, "i2c_master_recv failed with %d\n", ret);
+ return ret < 0 ? ret : -EFAULT;
+ }
+ if (buf[0] != 0xA0) {
+ dev_err(tx->ir->l.dev, "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) {
+ dev_err(tx->ir->l.dev, "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) {
+ dev_dbg(tx->ir->l.dev, "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;
+ dev_dbg(tx->ir->l.dev,
+ "NAK expected: i2c_master_send failed with %d (try %d)\n",
+ ret, i+1);
+ }
+ if (ret != 1) {
+ dev_err(tx->ir->l.dev,
+ "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) {
+ dev_err(tx->ir->l.dev, "i2c_master_recv failed with %d\n", ret);
+ return -EFAULT;
+ }
+ if (buf[0] != 0x80) {
+ dev_err(tx->ir->l.dev, "unexpected IR TX response #2: %02x\n",
+ buf[0]);
+ return -EFAULT;
+ }
+
+ /* Oh good, it worked */
+ dev_dbg(tx->ir->l.dev, "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 __user *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 */
+ dev_err(tx->ir->l.dev,
+ "sending to the IR transmitter chip failed, trying reset\n");
+
+ if (failures >= 3) {
+ dev_err(tx->ir->l.dev,
+ "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;
+
+ dev_dbg(ir->l.dev, "poll called\n");
+
+ rx = get_ir_rx(ir);
+ if (rx == NULL) {
+ /*
+ * Revisit this, if our poll function ever reports writeable
+ * status for Tx
+ */
+ dev_dbg(ir->l.dev, "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);
+
+ dev_dbg(ir->l.dev, "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;
+ unsigned long __user *uptr = (unsigned long __user *)arg;
+ int result;
+ unsigned long mode, features;
+
+ features = ir->l.features;
+
+ switch (cmd) {
+ case LIRC_GET_LENGTH:
+ result = put_user(13UL, uptr);
+ break;
+ case LIRC_GET_FEATURES:
+ result = put_user(features, uptr);
+ break;
+ case LIRC_GET_REC_MODE:
+ if (!(features&LIRC_CAN_REC_MASK))
+ return -ENOSYS;
+
+ result = put_user(LIRC_REC2MODE
+ (features&LIRC_CAN_REC_MASK),
+ uptr);
+ break;
+ case LIRC_SET_REC_MODE:
+ if (!(features&LIRC_CAN_REC_MASK))
+ return -ENOSYS;
+
+ result = get_user(mode, uptr);
+ 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, uptr);
+ break;
+ case LIRC_SET_SEND_MODE:
+ if (!(features&LIRC_CAN_SEND_MASK))
+ return -ENOSYS;
+
+ result = get_user(mode, uptr);
+ 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) {
+ pr_err("ir: 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;
+
+ dev_dbg(&client->dev, "%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;
+
+ pr_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) {
+ dev_info(tx->ir->l.dev,
+ "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);
+ dev_err(tx->ir->l.dev,
+ "%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) {
+ pr_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) {
+ dev_err(tx->ir->l.dev,
+ "%s: \"minor\" must be between 0 and %d (%d)!\n",
+ __func__, MAX_IRCTL_DEVICES-1, ir->l.minor);
+ ret = -EBADRQC;
+ goto out_put_xx;
+ }
+ dev_info(ir->l.dev,
+ "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);
+ dev_info(ir->l.dev,
+ "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:
+ dev_err(&client->dev,
+ "%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;
+
+ pr_notice("Zilog/Hauppauge IR driver initializing\n");
+
+ mutex_init(&tx_data_lock);
+
+ request_module("firmware_class");
+
+ ret = i2c_add_driver(&driver);
+ if (ret)
+ pr_err("initialization failed\n");
+ else
+ pr_notice("initialization complete\n");
+
+ return ret;
+}
+
+static void __exit zilog_exit(void)
+{
+ i2c_del_driver(&driver);
+ /* if loaded */
+ fw_unload();
+ pr_notice("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");
Code Review / kvmfornfv.git / blobdiff