| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| Mauro Carvalho Chehab | 1482 | 71.49% | 3 | 8.11% |
| Hans Verkuil | 476 | 22.96% | 10 | 27.03% |
| Eric Sesterhenn / Snakebyte | 20 | 0.96% | 1 | 2.70% |
| Gerd Knorr | 15 | 0.72% | 2 | 5.41% |
| Hans-Jürgen Koch | 14 | 0.68% | 3 | 8.11% |
| Laurent Pinchart | 12 | 0.58% | 1 | 2.70% |
| Jean Delvare | 11 | 0.53% | 1 | 2.70% |
| David Howells | 10 | 0.48% | 1 | 2.70% |
| Linus Torvalds (pre-git) | 6 | 0.29% | 2 | 5.41% |
| Fabian Frederick | 4 | 0.19% | 1 | 2.70% |
| Andrew Morton | 4 | 0.19% | 1 | 2.70% |
| Al Viro | 3 | 0.14% | 2 | 5.41% |
| Arnd Bergmann | 3 | 0.14% | 1 | 2.70% |
| Linus Torvalds | 3 | 0.14% | 2 | 5.41% |
| Matti J. Aaltonen | 2 | 0.10% | 1 | 2.70% |
| Uwe Kleine-König | 2 | 0.10% | 2 | 5.41% |
| Axel Lin | 2 | 0.10% | 1 | 2.70% |
| Laurent Riffard | 2 | 0.10% | 1 | 2.70% |
| Thomas Gleixner | 2 | 0.10% | 1 | 2.70% |
| Total | 2073 | 37 |
// SPDX-License-Identifier: GPL-2.0-or-later /* Driver for SAA6588 RDS decoder (c) 2005 Hans J. Koch */ #include <linux/module.h> #include <linux/kernel.h> #include <linux/i2c.h> #include <linux/types.h> #include <linux/videodev2.h> #include <linux/init.h> #include <linux/errno.h> #include <linux/slab.h> #include <linux/poll.h> #include <linux/wait.h> #include <linux/uaccess.h> #include <media/i2c/saa6588.h> #include <media/v4l2-device.h> /* insmod options */ static unsigned int debug; static unsigned int xtal; static unsigned int mmbs; static unsigned int plvl; static unsigned int bufblocks = 100; module_param(debug, int, 0644); MODULE_PARM_DESC(debug, "enable debug messages"); module_param(xtal, int, 0); MODULE_PARM_DESC(xtal, "select oscillator frequency (0..3), default 0"); module_param(mmbs, int, 0); MODULE_PARM_DESC(mmbs, "enable MMBS mode: 0=off (default), 1=on"); module_param(plvl, int, 0); MODULE_PARM_DESC(plvl, "select pause level (0..3), default 0"); module_param(bufblocks, int, 0); MODULE_PARM_DESC(bufblocks, "number of buffered blocks, default 100"); MODULE_DESCRIPTION("v4l2 driver module for SAA6588 RDS decoder"); MODULE_AUTHOR("Hans J. Koch <koch@hjk-az.de>"); MODULE_LICENSE("GPL"); /* ---------------------------------------------------------------------- */ #define UNSET (-1U) #define PREFIX "saa6588: " #define dprintk if (debug) printk struct saa6588 { struct v4l2_subdev sd; struct delayed_work work; spinlock_t lock; unsigned char *buffer; unsigned int buf_size; unsigned int rd_index; unsigned int wr_index; unsigned int block_count; unsigned char last_blocknum; wait_queue_head_t read_queue; int data_available_for_read; u8 sync; }; static inline struct saa6588 *to_saa6588(struct v4l2_subdev *sd) { return container_of(sd, struct saa6588, sd); } /* ---------------------------------------------------------------------- */ /* * SAA6588 defines */ /* Initialization and mode control byte (0w) */ /* bit 0+1 (DAC0/DAC1) */ #define cModeStandard 0x00 #define cModeFastPI 0x01 #define cModeReducedRequest 0x02 #define cModeInvalid 0x03 /* bit 2 (RBDS) */ #define cProcessingModeRDS 0x00 #define cProcessingModeRBDS 0x04 /* bit 3+4 (SYM0/SYM1) */ #define cErrCorrectionNone 0x00 #define cErrCorrection2Bits 0x08 #define cErrCorrection5Bits 0x10 #define cErrCorrectionNoneRBDS 0x18 /* bit 5 (NWSY) */ #define cSyncNormal 0x00 #define cSyncRestart 0x20 /* bit 6 (TSQD) */ #define cSigQualityDetectOFF 0x00 #define cSigQualityDetectON 0x40 /* bit 7 (SQCM) */ #define cSigQualityTriggered 0x00 #define cSigQualityContinous 0x80 /* Pause level and flywheel control byte (1w) */ /* bits 0..5 (FEB0..FEB5) */ #define cFlywheelMaxBlocksMask 0x3F #define cFlywheelDefault 0x20 /* bits 6+7 (PL0/PL1) */ #define cPauseLevel_11mV 0x00 #define cPauseLevel_17mV 0x40 #define cPauseLevel_27mV 0x80 #define cPauseLevel_43mV 0xC0 /* Pause time/oscillator frequency/quality detector control byte (1w) */ /* bits 0..4 (SQS0..SQS4) */ #define cQualityDetectSensMask 0x1F #define cQualityDetectDefault 0x0F /* bit 5 (SOSC) */ #define cSelectOscFreqOFF 0x00 #define cSelectOscFreqON 0x20 /* bit 6+7 (PTF0/PTF1) */ #define cOscFreq_4332kHz 0x00 #define cOscFreq_8664kHz 0x40 #define cOscFreq_12996kHz 0x80 #define cOscFreq_17328kHz 0xC0 /* ---------------------------------------------------------------------- */ static bool block_from_buf(struct saa6588 *s, unsigned char *buf) { int i; if (s->rd_index == s->wr_index) { if (debug > 2) dprintk(PREFIX "Read: buffer empty.\n"); return false; } if (debug > 2) { dprintk(PREFIX "Read: "); for (i = s->rd_index; i < s->rd_index + 3; i++) dprintk("0x%02x ", s->buffer[i]); } memcpy(buf, &s->buffer[s->rd_index], 3); s->rd_index += 3; if (s->rd_index >= s->buf_size) s->rd_index = 0; s->block_count--; if (debug > 2) dprintk("%d blocks total.\n", s->block_count); return true; } static void read_from_buf(struct saa6588 *s, struct saa6588_command *a) { unsigned char __user *buf_ptr = a->buffer; unsigned char buf[3]; unsigned long flags; unsigned int rd_blocks; unsigned int i; a->result = 0; if (!a->buffer) return; while (!a->nonblocking && !s->data_available_for_read) { int ret = wait_event_interruptible(s->read_queue, s->data_available_for_read); if (ret == -ERESTARTSYS) { a->result = -EINTR; return; } } rd_blocks = a->block_count; spin_lock_irqsave(&s->lock, flags); if (rd_blocks > s->block_count) rd_blocks = s->block_count; spin_unlock_irqrestore(&s->lock, flags); if (!rd_blocks) return; for (i = 0; i < rd_blocks; i++) { bool got_block; spin_lock_irqsave(&s->lock, flags); got_block = block_from_buf(s, buf); spin_unlock_irqrestore(&s->lock, flags); if (!got_block) break; if (copy_to_user(buf_ptr, buf, 3)) { a->result = -EFAULT; return; } buf_ptr += 3; a->result += 3; } spin_lock_irqsave(&s->lock, flags); s->data_available_for_read = (s->block_count > 0); spin_unlock_irqrestore(&s->lock, flags); } static void block_to_buf(struct saa6588 *s, unsigned char *blockbuf) { unsigned int i; if (debug > 3) dprintk(PREFIX "New block: "); for (i = 0; i < 3; ++i) { if (debug > 3) dprintk("0x%02x ", blockbuf[i]); s->buffer[s->wr_index] = blockbuf[i]; s->wr_index++; } if (s->wr_index >= s->buf_size) s->wr_index = 0; if (s->wr_index == s->rd_index) { s->rd_index += 3; if (s->rd_index >= s->buf_size) s->rd_index = 0; } else s->block_count++; if (debug > 3) dprintk("%d blocks total.\n", s->block_count); } static void saa6588_i2c_poll(struct saa6588 *s) { struct i2c_client *client = v4l2_get_subdevdata(&s->sd); unsigned long flags; unsigned char tmpbuf[6]; unsigned char blocknum; unsigned char tmp; /* Although we only need 3 bytes, we have to read at least 6. SAA6588 returns garbage otherwise. */ if (6 != i2c_master_recv(client, &tmpbuf[0], 6)) { if (debug > 1) dprintk(PREFIX "read error!\n"); return; } s->sync = tmpbuf[0] & 0x10; if (!s->sync) return; blocknum = tmpbuf[0] >> 5; if (blocknum == s->last_blocknum) { if (debug > 3) dprintk("Saw block %d again.\n", blocknum); return; } s->last_blocknum = blocknum; /* Byte order according to v4l2 specification: Byte 0: Least Significant Byte of RDS Block Byte 1: Most Significant Byte of RDS Block Byte 2 Bit 7: Error bit. Indicates that an uncorrectable error occurred during reception of this block. Bit 6: Corrected bit. Indicates that an error was corrected for this data block. Bits 5-3: Same as bits 0-2. Bits 2-0: Block number. SAA6588 byte order is Status-MSB-LSB, so we have to swap the first and the last of the 3 bytes block. */ swap(tmpbuf[2], tmpbuf[0]); /* Map 'Invalid block E' to 'Invalid Block' */ if (blocknum == 6) blocknum = V4L2_RDS_BLOCK_INVALID; /* And if are not in mmbs mode, then 'Block E' is also mapped to 'Invalid Block'. As far as I can tell MMBS is discontinued, and if there is ever a need to support E blocks, then please contact the linux-media mailinglist. */ else if (!mmbs && blocknum == 5) blocknum = V4L2_RDS_BLOCK_INVALID; tmp = blocknum; tmp |= blocknum << 3; /* Received offset == Offset Name (OK ?) */ if ((tmpbuf[2] & 0x03) == 0x03) tmp |= V4L2_RDS_BLOCK_ERROR; /* uncorrectable error */ else if ((tmpbuf[2] & 0x03) != 0x00) tmp |= V4L2_RDS_BLOCK_CORRECTED; /* corrected error */ tmpbuf[2] = tmp; /* Is this enough ? Should we also check other bits ? */ spin_lock_irqsave(&s->lock, flags); block_to_buf(s, tmpbuf); spin_unlock_irqrestore(&s->lock, flags); s->data_available_for_read = 1; wake_up_interruptible(&s->read_queue); } static void saa6588_work(struct work_struct *work) { struct saa6588 *s = container_of(work, struct saa6588, work.work); saa6588_i2c_poll(s); schedule_delayed_work(&s->work, msecs_to_jiffies(20)); } static void saa6588_configure(struct saa6588 *s) { struct i2c_client *client = v4l2_get_subdevdata(&s->sd); unsigned char buf[3]; int rc; buf[0] = cSyncRestart; if (mmbs) buf[0] |= cProcessingModeRBDS; buf[1] = cFlywheelDefault; switch (plvl) { case 0: buf[1] |= cPauseLevel_11mV; break; case 1: buf[1] |= cPauseLevel_17mV; break; case 2: buf[1] |= cPauseLevel_27mV; break; case 3: buf[1] |= cPauseLevel_43mV; break; default: /* nothing */ break; } buf[2] = cQualityDetectDefault | cSelectOscFreqON; switch (xtal) { case 0: buf[2] |= cOscFreq_4332kHz; break; case 1: buf[2] |= cOscFreq_8664kHz; break; case 2: buf[2] |= cOscFreq_12996kHz; break; case 3: buf[2] |= cOscFreq_17328kHz; break; default: /* nothing */ break; } dprintk(PREFIX "writing: 0w=0x%02x 1w=0x%02x 2w=0x%02x\n", buf[0], buf[1], buf[2]); rc = i2c_master_send(client, buf, 3); if (rc != 3) printk(PREFIX "i2c i/o error: rc == %d (should be 3)\n", rc); } /* ---------------------------------------------------------------------- */ static long saa6588_command(struct v4l2_subdev *sd, unsigned int cmd, void *arg) { struct saa6588 *s = to_saa6588(sd); struct saa6588_command *a = arg; switch (cmd) { /* --- close() for /dev/radio --- */ case SAA6588_CMD_CLOSE: s->data_available_for_read = 1; wake_up_interruptible(&s->read_queue); s->data_available_for_read = 0; a->result = 0; break; /* --- read() for /dev/radio --- */ case SAA6588_CMD_READ: read_from_buf(s, a); break; /* --- poll() for /dev/radio --- */ case SAA6588_CMD_POLL: a->poll_mask = 0; if (s->data_available_for_read) a->poll_mask |= EPOLLIN | EPOLLRDNORM; poll_wait(a->instance, &s->read_queue, a->event_list); break; default: /* nothing */ return -ENOIOCTLCMD; } return 0; } static int saa6588_g_tuner(struct v4l2_subdev *sd, struct v4l2_tuner *vt) { struct saa6588 *s = to_saa6588(sd); vt->capability |= V4L2_TUNER_CAP_RDS | V4L2_TUNER_CAP_RDS_BLOCK_IO; if (s->sync) vt->rxsubchans |= V4L2_TUNER_SUB_RDS; return 0; } static int saa6588_s_tuner(struct v4l2_subdev *sd, const struct v4l2_tuner *vt) { struct saa6588 *s = to_saa6588(sd); saa6588_configure(s); return 0; } /* ----------------------------------------------------------------------- */ static const struct v4l2_subdev_core_ops saa6588_core_ops = { .command = saa6588_command, }; static const struct v4l2_subdev_tuner_ops saa6588_tuner_ops = { .g_tuner = saa6588_g_tuner, .s_tuner = saa6588_s_tuner, }; static const struct v4l2_subdev_ops saa6588_ops = { .core = &saa6588_core_ops, .tuner = &saa6588_tuner_ops, }; /* ---------------------------------------------------------------------- */ static int saa6588_probe(struct i2c_client *client) { struct saa6588 *s; struct v4l2_subdev *sd; v4l_info(client, "saa6588 found @ 0x%x (%s)\n", client->addr << 1, client->adapter->name); s = devm_kzalloc(&client->dev, sizeof(*s), GFP_KERNEL); if (s == NULL) return -ENOMEM; s->buf_size = bufblocks * 3; s->buffer = devm_kzalloc(&client->dev, s->buf_size, GFP_KERNEL); if (s->buffer == NULL) return -ENOMEM; sd = &s->sd; v4l2_i2c_subdev_init(sd, client, &saa6588_ops); spin_lock_init(&s->lock); s->block_count = 0; s->wr_index = 0; s->rd_index = 0; s->last_blocknum = 0xff; init_waitqueue_head(&s->read_queue); s->data_available_for_read = 0; saa6588_configure(s); /* start polling via eventd */ INIT_DELAYED_WORK(&s->work, saa6588_work); schedule_delayed_work(&s->work, 0); return 0; } static void saa6588_remove(struct i2c_client *client) { struct v4l2_subdev *sd = i2c_get_clientdata(client); struct saa6588 *s = to_saa6588(sd); v4l2_device_unregister_subdev(sd); cancel_delayed_work_sync(&s->work); } /* ----------------------------------------------------------------------- */ static const struct i2c_device_id saa6588_id[] = { { "saa6588", 0 }, { } }; MODULE_DEVICE_TABLE(i2c, saa6588_id); static struct i2c_driver saa6588_driver = { .driver = { .name = "saa6588", }, .probe = saa6588_probe, .remove = saa6588_remove, .id_table = saa6588_id, }; module_i2c_driver(saa6588_driver);
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