/* * i2c IR lirc driver for devices with zilog IR processors * * Copyright (c) 2000 Gerd Knorr * modified for PixelView (BT878P+W/FM) by * Michal Kochanowicz * Christoph Bartelmus * modified for KNC ONE TV Station/Anubis Typhoon TView Tuner by * Ulrich Mueller * modified for Asus TV-Box and Creative/VisionTek BreakOut-Box by * Stefan Jahn * modified for inclusion into kernel sources by * Jerome Brock * modified for Leadtek Winfast PVR2000 by * Thomas Reitmayr (treitmayr@yahoo.com) * modified for Hauppauge PVR-150 IR TX device by * Mark Weaver * changed name from lirc_pvr150 to lirc_zilog, works on more than pvr-150 * Jarod Wilson * * parts are cut&pasted from the lirc_i2c.c driver * * 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 #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include struct IR { struct lirc_driver l; /* Device info */ struct mutex ir_lock; int open; /* RX device */ struct i2c_client c_rx; int have_rx; /* RX device buffer & lock */ struct lirc_buffer buf; struct mutex buf_lock; /* RX polling thread data */ struct completion *t_notify; struct completion *t_notify2; int shutdown; struct task_struct *task; /* RX read data */ unsigned char b[3]; /* TX device */ struct i2c_client c_tx; int need_boot; int have_tx; }; /* Minor -> data mapping */ static struct IR *ir_devices[MAX_IRCTL_DEVICES]; /* 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; #define zilog_notify(s, args...) printk(KERN_NOTICE KBUILD_MODNAME ": " s, \ ## args) #define zilog_error(s, args...) printk(KERN_ERR KBUILD_MODNAME ": " s, ## args) #define ZILOG_HAUPPAUGE_IR_RX_NAME "Zilog/Hauppauge IR RX" #define ZILOG_HAUPPAUGE_IR_TX_NAME "Zilog/Hauppauge IR TX" /* module parameters */ static int debug; /* debug output */ static int disable_rx; /* disable RX device */ static int disable_tx; /* disable TX device */ static int minor = -1; /* minor number */ #define dprintk(fmt, args...) \ do { \ if (debug) \ printk(KERN_DEBUG KBUILD_MODNAME ": " fmt, \ ## args); \ } while (0) 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 }; if (lirc_buffer_full(&ir->buf)) { dprintk("buffer overflow\n"); return -EOVERFLOW; } /* * service the device as long as it is returning * data and we have space */ do { /* * Lock i2c bus for the duration. RX/TX chips interfere so * this is worth it */ mutex_lock(&ir->ir_lock); /* * Send random "poll command" (?) Windows driver does this * and it is a good point to detect chip failure. */ ret = i2c_master_send(&ir->c_rx, sendbuf, 1); if (ret != 1) { zilog_error("i2c_master_send failed with %d\n", ret); if (failures >= 3) { mutex_unlock(&ir->ir_lock); zilog_error("unable to read from the IR chip " "after 3 resets, giving up\n"); return ret; } /* Looks like the chip crashed, reset it */ zilog_error("polling the IR receiver chip failed, " "trying reset\n"); set_current_state(TASK_UNINTERRUPTIBLE); schedule_timeout((100 * HZ + 999) / 1000); ir->need_boot = 1; ++failures; mutex_unlock(&ir->ir_lock); continue; } ret = i2c_master_recv(&ir->c_rx, keybuf, sizeof(keybuf)); mutex_unlock(&ir->ir_lock); if (ret != sizeof(keybuf)) { zilog_error("i2c_master_recv failed with %d -- " "keeping last read buffer\n", ret); } else { ir->b[0] = keybuf[3]; ir->b[1] = keybuf[4]; ir->b[2] = keybuf[5]; dprintk("key (0x%02x/0x%02x)\n", ir->b[0], ir->b[1]); } /* key pressed ? */ #ifdef I2C_HW_B_HDPVR if (ir->c_rx.adapter->id == I2C_HW_B_HDPVR) { if (got_data && (keybuf[0] == 0x80)) return 0; else if (got_data && (keybuf[0] == 0x00)) return -ENODATA; } else if ((ir->b[0] & 0x80) == 0) #else if ((ir->b[0] & 0x80) == 0) #endif return got_data ? 0 : -ENODATA; /* look what we have */ code = (((__u16)ir->b[0] & 0x7f) << 6) | (ir->b[1] >> 2); codes[0] = (code >> 8) & 0xff; codes[1] = code & 0xff; /* return it */ lirc_buffer_write(&ir->buf, codes); ++got_data; } while (!lirc_buffer_full(&ir->buf)); return 0; } /* * 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; if (ir->t_notify != NULL) complete(ir->t_notify); dprintk("poll thread started\n"); do { if (ir->open) { set_current_state(TASK_INTERRUPTIBLE); /* * 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 (ir->shutdown) break; if (!add_to_buf(ir)) wake_up_interruptible(&ir->buf.wait_poll); } else { /* if device not opened so we can sleep half a second */ set_current_state(TASK_INTERRUPTIBLE); schedule_timeout(HZ/2); } } while (!ir->shutdown); if (ir->t_notify2 != NULL) wait_for_completion(ir->t_notify2); ir->task = NULL; if (ir->t_notify != NULL) complete(ir->t_notify); dprintk("poll thread ended\n"); return 0; } static int set_use_inc(void *data) { struct IR *ir = data; if (ir->l.owner == NULL || try_module_get(ir->l.owner) == 0) return -ENODEV; /* lock bttv in memory while /dev/lirc is in use */ /* * this is completely broken code. lirc_unregister_driver() * must be possible even when the device is open */ if (ir->c_rx.addr) i2c_use_client(&ir->c_rx); if (ir->c_tx.addr) i2c_use_client(&ir->c_tx); return 0; } static void set_use_dec(void *data) { struct IR *ir = data; if (ir->c_rx.addr) i2c_release_client(&ir->c_rx); if (ir->c_tx.addr) i2c_release_client(&ir->c_tx); if (ir->l.owner != NULL) module_put(ir->l.owner); } /* safe read of a uint32 (always network byte order) */ static int read_uint32(unsigned char **data, unsigned char *endp, unsigned int *val) { if (*data + 4 > endp) return 0; *val = ((*data)[0] << 24) | ((*data)[1] << 16) | ((*data)[2] << 8) | (*data)[3]; *data += 4; return 1; } /* safe read of a uint8 */ static int read_uint8(unsigned char **data, unsigned char *endp, unsigned char *val) { if (*data + 1 > endp) return 0; *val = *((*data)++); return 1; } /* safe skipping of N bytes */ static int skip(unsigned char **data, unsigned char *endp, unsigned int distance) { if (*data + distance > endp) return 0; *data += distance; return 1; } /* decompress key data into the given buffer */ static int get_key_data(unsigned char *buf, unsigned int codeset, unsigned int key) { unsigned char *data, *endp, *diffs, *key_block; unsigned char keys, ndiffs, id; unsigned int base, lim, pos, i; /* Binary search for the codeset */ for (base = 0, lim = tx_data->num_code_sets; lim; lim >>= 1) { pos = base + (lim >> 1); data = tx_data->code_sets[pos]; if (!read_uint32(&data, tx_data->endp, &i)) goto corrupt; if (i == codeset) break; else if (codeset > i) { base = pos + 1; --lim; } } /* Not found? */ if (!lim) return -EPROTO; /* Set end of data block */ endp = pos < tx_data->num_code_sets - 1 ? tx_data->code_sets[pos + 1] : tx_data->endp; /* Read the block header */ if (!read_uint8(&data, endp, &keys) || !read_uint8(&data, endp, &ndiffs) || ndiffs > TX_BLOCK_SIZE || keys == 0) goto corrupt; /* Save diffs & skip */ diffs = data; if (!skip(&data, endp, ndiffs)) goto corrupt; /* Read the id of the first key */ if (!read_uint8(&data, endp, &id)) goto corrupt; /* Unpack the first key's data */ for (i = 0; i < TX_BLOCK_SIZE; ++i) { if (tx_data->fixed[i] == -1) { if (!read_uint8(&data, endp, &buf[i])) goto corrupt; } else { buf[i] = (unsigned char)tx_data->fixed[i]; } } /* Early out key found/not found */ if (key == id) return 0; if (keys == 1) return -EPROTO; /* Sanity check */ key_block = data; if (!skip(&data, endp, (keys - 1) * (ndiffs + 1))) goto corrupt; /* Binary search for the key */ for (base = 0, lim = keys - 1; lim; lim >>= 1) { /* Seek to block */ unsigned char *key_data; pos = base + (lim >> 1); key_data = key_block + (ndiffs + 1) * pos; if (*key_data == key) { /* skip key id */ ++key_data; /* found, so unpack the diffs */ for (i = 0; i < ndiffs; ++i) { unsigned char val; if (!read_uint8(&key_data, endp, &val) || diffs[i] >= TX_BLOCK_SIZE) goto corrupt; buf[diffs[i]] = val; } return 0; } else if (key > *key_data) { base = pos + 1; --lim; } } /* Key not found */ return -EPROTO; corrupt: zilog_error("firmware is corrupt\n"); return -EFAULT; } /* send a block of data to the IR TX device */ static int send_data_block(struct IR *ir, unsigned char *data_block) { int i, j, ret; unsigned char buf[5]; for (i = 0; i < TX_BLOCK_SIZE;) { int tosend = TX_BLOCK_SIZE - i; if (tosend > 4) tosend = 4; buf[0] = (unsigned char)(i + 1); for (j = 0; j < tosend; ++j) buf[1 + j] = data_block[i + j]; dprintk("%02x %02x %02x %02x %02x", buf[0], buf[1], buf[2], buf[3], buf[4]); ret = i2c_master_send(&ir->c_tx, buf, tosend + 1); if (ret != tosend + 1) { zilog_error("i2c_master_send failed with %d\n", ret); return ret < 0 ? ret : -EFAULT; } i += tosend; } return 0; } /* send boot data to the IR TX device */ static int send_boot_data(struct IR *ir) { int ret; unsigned char buf[4]; /* send the boot block */ ret = send_data_block(ir, tx_data->boot_data); if (ret != 0) return ret; /* kick it off? */ buf[0] = 0x00; buf[1] = 0x20; ret = i2c_master_send(&ir->c_tx, buf, 2); if (ret != 2) { zilog_error("i2c_master_send failed with %d\n", ret); return ret < 0 ? ret : -EFAULT; } ret = i2c_master_send(&ir->c_tx, buf, 1); 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(&ir->c_tx, buf, 4); if (ret != 4) { zilog_error("i2c_master_recv failed with %d\n", ret); return 0; } if (buf[0] != 0x80) { zilog_error("unexpected IR TX 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 *ir) { 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", &ir->c_tx.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 *ir) { int ret; /* Load 'firmware' */ ret = fw_load(ir); if (ret != 0) return ret; /* Send boot block */ ret = send_boot_data(ir); if (ret != 0) return ret; ir->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 = (struct IR *)filep->private_data; unsigned char buf[ir->buf.chunk_size]; int ret = 0, written = 0; DECLARE_WAITQUEUE(wait, current); dprintk("read called\n"); if (ir->c_rx.addr == 0) return -ENODEV; if (mutex_lock_interruptible(&ir->buf_lock)) return -ERESTARTSYS; if (n % ir->buf.chunk_size) { dprintk("read result = -EINVAL\n"); mutex_unlock(&ir->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(&ir->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(&ir->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 { lirc_buffer_read(&ir->buf, buf); ret = copy_to_user((void *)outbuf+written, buf, ir->buf.chunk_size); written += ir->buf.chunk_size; } } remove_wait_queue(&ir->buf.wait_poll, &wait); set_current_state(TASK_RUNNING); mutex_unlock(&ir->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 *ir, 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(ir, data_block); if (ret != 0) return ret; /* Send data block length? */ buf[0] = 0x00; buf[1] = 0x40; ret = i2c_master_send(&ir->c_tx, buf, 2); if (ret != 2) { zilog_error("i2c_master_send failed with %d\n", ret); return ret < 0 ? ret : -EFAULT; } ret = i2c_master_send(&ir->c_tx, buf, 1); 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(&ir->c_tx, 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(&ir->c_tx, buf, 2); if (ret != 2) { zilog_error("i2c_master_send failed with %d\n", ret); return ret < 0 ? ret : -EFAULT; } #ifdef I2C_HW_B_HDPVR /* * 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 (ir->c_rx.adapter->id == I2C_HW_B_HDPVR) goto done; #endif /* * 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(&ir->c_tx, 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(&ir->c_tx, 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; } done: /* 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 = (struct IR *)filep->private_data; size_t i; int failures = 0; if (ir->c_tx.addr == 0) 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 (ir->need_boot == 1) { ret = send_boot_data(ir); if (ret == 0) ir->need_boot = 0; } /* Send the code */ if (ret == 0) { ret = send_code(ir, (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); ir->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 = (struct IR *)filep->private_data; unsigned int ret; dprintk("poll called\n"); if (ir->c_rx.addr == 0) return -ENODEV; mutex_lock(&ir->buf_lock); poll_wait(filep, &ir->buf.wait_poll, wait); dprintk("poll result = %s\n", lirc_buffer_empty(&ir->buf) ? "0" : "POLLIN|POLLRDNORM"); ret = lirc_buffer_empty(&ir->buf) ? 0 : (POLLIN|POLLRDNORM); mutex_unlock(&ir->buf_lock); return ret; } static long ioctl(struct file *filep, unsigned int cmd, unsigned long arg) { struct IR *ir = (struct IR *)filep->private_data; int result; unsigned long mode, features = 0; if (ir->c_rx.addr != 0) features |= LIRC_CAN_REC_LIRCCODE; if (ir->c_tx.addr != 0) features |= LIRC_CAN_SEND_PULSE; switch (cmd) { case LIRC_GET_LENGTH: result = put_user((unsigned long)13, (unsigned long *)arg); break; case LIRC_GET_FEATURES: result = put_user(features, (unsigned long *) arg); break; case LIRC_GET_REC_MODE: if (!(features&LIRC_CAN_REC_MASK)) return -ENOSYS; result = put_user(LIRC_REC2MODE (features&LIRC_CAN_REC_MASK), (unsigned long *)arg); break; case LIRC_SET_REC_MODE: if (!(features&LIRC_CAN_REC_MASK)) return -ENOSYS; result = get_user(mode, (unsigned long *)arg); if (!result && !(LIRC_MODE2REC(mode) & features)) result = -EINVAL; break; case LIRC_GET_SEND_MODE: if (!(features&LIRC_CAN_SEND_MASK)) return -ENOSYS; result = put_user(LIRC_MODE_PULSE, (unsigned long *) arg); break; case LIRC_SET_SEND_MODE: if (!(features&LIRC_CAN_SEND_MASK)) return -ENOSYS; result = get_user(mode, (unsigned long *) arg); if (!result && mode != LIRC_MODE_PULSE) return -EINVAL; break; default: return -EINVAL; } return result; } /* * 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; /* find our IR struct */ unsigned minor = MINOR(node->i_rdev); if (minor >= MAX_IRCTL_DEVICES) { dprintk("minor %d: open result = -ENODEV\n", minor); return -ENODEV; } ir = ir_devices[minor]; /* 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 = (struct 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); static int ir_command(struct i2c_client *client, unsigned int cmd, void *arg); static const struct i2c_device_id ir_transceiver_id[] = { /* Generic entry for any IR transceiver */ { "ir_video", 0 }, /* IR device specific entries should be added here */ { "ir_tx_z8f0811_haup", 0 }, { "ir_rx_z8f0811_haup", 0 }, { } }; static struct i2c_driver driver = { .driver = { .owner = THIS_MODULE, .name = "Zilog/Hauppauge i2c IR", }, .probe = ir_probe, .remove = ir_remove, .command = ir_command, .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, .open = open, .release = close }; static int ir_remove(struct i2c_client *client) { struct IR *ir = i2c_get_clientdata(client); mutex_lock(&ir->ir_lock); if (ir->have_rx || ir->have_tx) { DECLARE_COMPLETION(tn); DECLARE_COMPLETION(tn2); /* end up polling thread */ if (ir->task && !IS_ERR(ir->task)) { ir->t_notify = &tn; ir->t_notify2 = &tn2; ir->shutdown = 1; wake_up_process(ir->task); complete(&tn2); wait_for_completion(&tn); ir->t_notify = NULL; ir->t_notify2 = NULL; } } else { mutex_unlock(&ir->ir_lock); zilog_error("%s: detached from something we didn't " "attach to\n", __func__); return -ENODEV; } /* unregister lirc driver */ if (ir->l.minor >= 0 && ir->l.minor < MAX_IRCTL_DEVICES) { lirc_unregister_driver(ir->l.minor); ir_devices[ir->l.minor] = NULL; } /* free memory */ lirc_buffer_free(&ir->buf); mutex_unlock(&ir->ir_lock); kfree(ir); return 0; } static int ir_probe(struct i2c_client *client, const struct i2c_device_id *id) { struct IR *ir = NULL; struct i2c_adapter *adap = client->adapter; char buf; int ret; int have_rx = 0, have_tx = 0; dprintk("%s: adapter id=0x%x, client addr=0x%02x\n", __func__, adap->id, client->addr); /* * The external IR receiver is at i2c address 0x71. * The IR transmitter is at 0x70. */ client->addr = 0x70; if (!disable_tx) { if (i2c_master_recv(client, &buf, 1) == 1) have_tx = 1; dprintk("probe 0x70 @ %s: %s\n", adap->name, have_tx ? "success" : "failed"); } if (!disable_rx) { client->addr = 0x71; if (i2c_master_recv(client, &buf, 1) == 1) have_rx = 1; dprintk("probe 0x71 @ %s: %s\n", adap->name, have_rx ? "success" : "failed"); } if (!(have_rx || have_tx)) { zilog_error("%s: no devices found\n", adap->name); goto out_nodev; } printk(KERN_INFO "lirc_zilog: chip found with %s\n", have_rx && have_tx ? "RX and TX" : have_rx ? "RX only" : "TX only"); ir = kzalloc(sizeof(struct IR), GFP_KERNEL); if (!ir) goto out_nomem; ret = lirc_buffer_init(&ir->buf, 2, BUFLEN / 2); if (ret) goto out_nomem; mutex_init(&ir->ir_lock); mutex_init(&ir->buf_lock); ir->need_boot = 1; memcpy(&ir->l, &lirc_template, sizeof(struct lirc_driver)); ir->l.minor = -1; /* I2C attach to device */ i2c_set_clientdata(client, ir); /* initialise RX device */ if (have_rx) { DECLARE_COMPLETION(tn); memcpy(&ir->c_rx, client, sizeof(struct i2c_client)); ir->c_rx.addr = 0x71; strlcpy(ir->c_rx.name, ZILOG_HAUPPAUGE_IR_RX_NAME, I2C_NAME_SIZE); /* try to fire up polling thread */ ir->t_notify = &tn; ir->task = kthread_run(lirc_thread, ir, "lirc_zilog"); if (IS_ERR(ir->task)) { ret = PTR_ERR(ir->task); zilog_error("lirc_register_driver: cannot run " "poll thread %d\n", ret); goto err; } wait_for_completion(&tn); ir->t_notify = NULL; ir->have_rx = 1; } /* initialise TX device */ if (have_tx) { memcpy(&ir->c_tx, client, sizeof(struct i2c_client)); ir->c_tx.addr = 0x70; strlcpy(ir->c_tx.name, ZILOG_HAUPPAUGE_IR_TX_NAME, I2C_NAME_SIZE); ir->have_tx = 1; } /* set lirc_dev stuff */ ir->l.code_length = 13; ir->l.rbuf = &ir->buf; ir->l.fops = &lirc_fops; ir->l.data = ir; ir->l.minor = minor; ir->l.dev = &adap->dev; ir->l.sample_rate = 0; /* register with lirc */ ir->l.minor = lirc_register_driver(&ir->l); if (ir->l.minor < 0 || ir->l.minor >= MAX_IRCTL_DEVICES) { zilog_error("ir_attach: \"minor\" must be between 0 and %d " "(%d)!\n", MAX_IRCTL_DEVICES-1, ir->l.minor); ret = -EBADRQC; goto err; } /* store this for getting back in open() later on */ ir_devices[ir->l.minor] = ir; /* * 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. */ if (have_tx) { /* Special TX init */ ret = tx_init(ir); if (ret != 0) goto err; } return 0; err: /* undo everything, hopefully... */ if (ir->c_rx.addr) ir_remove(&ir->c_rx); if (ir->c_tx.addr) ir_remove(&ir->c_tx); return ret; out_nodev: zilog_error("no device found\n"); return -ENODEV; out_nomem: zilog_error("memory allocation failure\n"); kfree(ir); return -ENOMEM; } static int ir_command(struct i2c_client *client, unsigned int cmd, void *arg) { /* nothing */ return 0; } static int __init zilog_init(void) { int ret; zilog_notify("Zilog/Hauppauge IR driver initializing\n"); mutex_init(&tx_data_lock); request_module("firmware_class"); ret = i2c_add_driver(&driver); if (ret) zilog_error("initialization failed\n"); else zilog_notify("initialization complete\n"); return ret; } static void __exit zilog_exit(void) { i2c_del_driver(&driver); /* if loaded */ fw_unload(); zilog_notify("Zilog/Hauppauge IR driver unloaded\n"); } module_init(zilog_init); module_exit(zilog_exit); MODULE_DESCRIPTION("Zilog/Hauppauge infrared transmitter driver (i2c stack)"); MODULE_AUTHOR("Gerd Knorr, Michal Kochanowicz, Christoph Bartelmus, " "Ulrich Mueller, Stefan Jahn, Jerome Brock, Mark Weaver"); 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(disable_rx, bool, 0644); MODULE_PARM_DESC(disable_rx, "Disable the IR receiver device"); module_param(disable_tx, bool, 0644); MODULE_PARM_DESC(disable_tx, "Disable the IR transmitter device");