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author | Mauro Carvalho Chehab <mchehab@redhat.com> | 2012-08-14 16:23:43 -0300 |
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committer | Mauro Carvalho Chehab <mchehab@redhat.com> | 2012-08-15 16:42:14 -0300 |
commit | cb7a01ac324bf2ee2c666f37ac867e4135f9785a (patch) | |
tree | 7246b915a9334d4bc823c93ba9acab65ef882678 /drivers/media/video/saa6588.c | |
parent | f0af8fa4dad0839f844fd0633e1936493f6d685a (diff) | |
download | linux-3.10-cb7a01ac324bf2ee2c666f37ac867e4135f9785a.tar.gz linux-3.10-cb7a01ac324bf2ee2c666f37ac867e4135f9785a.tar.bz2 linux-3.10-cb7a01ac324bf2ee2c666f37ac867e4135f9785a.zip |
[media] move i2c files into drivers/media/i2c
Move ancillary I2C drivers into drivers/media/i2c, in order to
better organize them.
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Diffstat (limited to 'drivers/media/video/saa6588.c')
-rw-r--r-- | drivers/media/video/saa6588.c | 542 |
1 files changed, 0 insertions, 542 deletions
diff --git a/drivers/media/video/saa6588.c b/drivers/media/video/saa6588.c deleted file mode 100644 index 0caac50d7cf..00000000000 --- a/drivers/media/video/saa6588.c +++ /dev/null @@ -1,542 +0,0 @@ -/* - Driver for SAA6588 RDS decoder - - (c) 2005 Hans J. Koch - - 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., 675 Mass Ave, Cambridge, MA 02139, USA. -*/ - - -#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 <asm/uaccess.h> - -#include <media/saa6588.h> -#include <media/v4l2-device.h> -#include <media/v4l2-chip-ident.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 int block_to_user_buf(struct saa6588 *s, unsigned char __user *user_buf) -{ - int i; - - if (s->rd_index == s->wr_index) { - if (debug > 2) - dprintk(PREFIX "Read: buffer empty.\n"); - return 0; - } - - if (debug > 2) { - dprintk(PREFIX "Read: "); - for (i = s->rd_index; i < s->rd_index + 3; i++) - dprintk("0x%02x ", s->buffer[i]); - } - - if (copy_to_user(user_buf, &s->buffer[s->rd_index], 3)) - return -EFAULT; - - 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 1; -} - -static void read_from_buf(struct saa6588 *s, struct saa6588_command *a) -{ - unsigned long flags; - - unsigned char __user *buf_ptr = a->buffer; - unsigned int i; - unsigned int rd_blocks; - - a->result = 0; - if (!a->buffer) - return; - - while (!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; - } - } - - spin_lock_irqsave(&s->lock, flags); - rd_blocks = a->block_count; - if (rd_blocks > s->block_count) - rd_blocks = s->block_count; - - if (!rd_blocks) { - spin_unlock_irqrestore(&s->lock, flags); - return; - } - - for (i = 0; i < rd_blocks; i++) { - if (block_to_user_buf(s, buf_ptr)) { - buf_ptr += 3; - a->result++; - } else - break; - } - a->result *= 3; - 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. - */ - - tmp = tmpbuf[2]; - tmpbuf[2] = tmpbuf[0]; - tmpbuf[0] = tmp; - - /* 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_ioctl(struct v4l2_subdev *sd, unsigned int cmd, void *arg) -{ - struct saa6588 *s = to_saa6588(sd); - struct saa6588_command *a = arg; - - switch (cmd) { - /* --- open() for /dev/radio --- */ - case SAA6588_CMD_OPEN: - a->result = 0; /* return error if chip doesn't work ??? */ - break; - /* --- close() for /dev/radio --- */ - case SAA6588_CMD_CLOSE: - s->data_available_for_read = 1; - wake_up_interruptible(&s->read_queue); - 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->result = 0; - if (s->data_available_for_read) { - a->result |= POLLIN | POLLRDNORM; - } - 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, struct v4l2_tuner *vt) -{ - struct saa6588 *s = to_saa6588(sd); - - saa6588_configure(s); - return 0; -} - -static int saa6588_g_chip_ident(struct v4l2_subdev *sd, struct v4l2_dbg_chip_ident *chip) -{ - struct i2c_client *client = v4l2_get_subdevdata(sd); - - return v4l2_chip_ident_i2c_client(client, chip, V4L2_IDENT_SAA6588, 0); -} - -/* ----------------------------------------------------------------------- */ - -static const struct v4l2_subdev_core_ops saa6588_core_ops = { - .g_chip_ident = saa6588_g_chip_ident, - .ioctl = saa6588_ioctl, -}; - -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, - const struct i2c_device_id *id) -{ - struct saa6588 *s; - struct v4l2_subdev *sd; - - v4l_info(client, "saa6588 found @ 0x%x (%s)\n", - client->addr << 1, client->adapter->name); - - s = kzalloc(sizeof(*s), GFP_KERNEL); - if (s == NULL) - return -ENOMEM; - - s->buf_size = bufblocks * 3; - - s->buffer = kmalloc(s->buf_size, GFP_KERNEL); - if (s->buffer == NULL) { - kfree(s); - 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 int 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); - - kfree(s->buffer); - kfree(s); - return 0; -} - -/* ----------------------------------------------------------------------- */ - -static const struct i2c_device_id saa6588_id[] = { - { "saa6588", 0 }, - { } -}; -MODULE_DEVICE_TABLE(i2c, saa6588_id); - -static struct i2c_driver saa6588_driver = { - .driver = { - .owner = THIS_MODULE, - .name = "saa6588", - }, - .probe = saa6588_probe, - .remove = saa6588_remove, - .id_table = saa6588_id, -}; - -module_i2c_driver(saa6588_driver); |