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Diffstat (limited to 'drivers/media/video/saa6588.c')
-rw-r--r--drivers/media/video/saa6588.c523
1 files changed, 0 insertions, 523 deletions
diff --git a/drivers/media/video/saa6588.c b/drivers/media/video/saa6588.c
deleted file mode 100644
index f05024259f0..00000000000
--- a/drivers/media/video/saa6588.c
+++ /dev/null
@@ -1,523 +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/videodev.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/rds.h>
-
-/* Addresses to scan */
-static unsigned short normal_i2c[] = {
- 0x20 >> 1,
- 0x22 >> 1,
- I2C_CLIENT_END,
-};
-
-I2C_CLIENT_INSMOD;
-
-/* insmod options */
-static unsigned int debug;
-static unsigned int xtal;
-static unsigned int rbds;
-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(rbds, int, 0);
-MODULE_PARM_DESC(rbds, "select mode, 0=RDS, 1=RBDS, default 0");
-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 i2c_client client;
- struct work_struct work;
- struct timer_list timer;
- 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;
-};
-
-static struct i2c_driver driver;
-static struct i2c_client client_template;
-
-/* ---------------------------------------------------------------------- */
-
-/*
- * 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 rds_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)
-{
- 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(&s->client, &tmpbuf[0], 6)) {
- if (debug > 1)
- dprintk(PREFIX "read error!\n");
- 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: Received Offset. Indicates the offset received
- by the sync system.
- Bits 2-0: Offset Name. Indicates the offset applied to this data.
-
- 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;
-
- tmp = blocknum;
- tmp |= blocknum << 3; /* Received offset == Offset Name (OK ?) */
- if ((tmpbuf[2] & 0x03) == 0x03)
- tmp |= 0x80; /* uncorrectable error */
- else if ((tmpbuf[2] & 0x03) != 0x00)
- tmp |= 0x40; /* 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_timer(unsigned long data)
-{
- struct saa6588 *s = (struct saa6588 *)data;
-
- schedule_work(&s->work);
-}
-
-static void saa6588_work(struct work_struct *work)
-{
- struct saa6588 *s = container_of(work, struct saa6588, work);
-
- saa6588_i2c_poll(s);
- mod_timer(&s->timer, jiffies + msecs_to_jiffies(20));
-}
-
-static int saa6588_configure(struct saa6588 *s)
-{
- unsigned char buf[3];
- int rc;
-
- buf[0] = cSyncRestart;
- if (rbds)
- 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]);
-
- if (3 != (rc = i2c_master_send(&s->client, buf, 3)))
- printk(PREFIX "i2c i/o error: rc == %d (should be 3)\n", rc);
-
- return 0;
-}
-
-/* ---------------------------------------------------------------------- */
-
-static int saa6588_attach(struct i2c_adapter *adap, int addr, int kind)
-{
- struct saa6588 *s;
- client_template.adapter = adap;
- client_template.addr = addr;
-
- printk(PREFIX "chip found @ 0x%x\n", addr << 1);
-
- if (NULL == (s = kmalloc(sizeof(*s), GFP_KERNEL)))
- return -ENOMEM;
-
- s->buf_size = bufblocks * 3;
-
- if (NULL == (s->buffer = kmalloc(s->buf_size, GFP_KERNEL))) {
- kfree(s);
- return -ENOMEM;
- }
- spin_lock_init(&s->lock);
- s->client = client_template;
- 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;
- i2c_set_clientdata(&s->client, s);
- i2c_attach_client(&s->client);
-
- saa6588_configure(s);
-
- /* start polling via eventd */
- INIT_WORK(&s->work, saa6588_work);
- init_timer(&s->timer);
- s->timer.function = saa6588_timer;
- s->timer.data = (unsigned long)s;
- schedule_work(&s->work);
- return 0;
-}
-
-static int saa6588_probe(struct i2c_adapter *adap)
-{
- if (adap->class & I2C_CLASS_TV_ANALOG)
- return i2c_probe(adap, &addr_data, saa6588_attach);
- return 0;
-}
-
-static int saa6588_detach(struct i2c_client *client)
-{
- struct saa6588 *s = i2c_get_clientdata(client);
-
- del_timer_sync(&s->timer);
- flush_scheduled_work();
-
- i2c_detach_client(client);
- kfree(s->buffer);
- kfree(s);
- return 0;
-}
-
-static int saa6588_command(struct i2c_client *client, unsigned int cmd,
- void *arg)
-{
- struct saa6588 *s = i2c_get_clientdata(client);
- struct rds_command *a = (struct rds_command *)arg;
-
- switch (cmd) {
- /* --- open() for /dev/radio --- */
- case RDS_CMD_OPEN:
- a->result = 0; /* return error if chip doesn't work ??? */
- break;
- /* --- close() for /dev/radio --- */
- case RDS_CMD_CLOSE:
- s->data_available_for_read = 1;
- wake_up_interruptible(&s->read_queue);
- a->result = 0;
- break;
- /* --- read() for /dev/radio --- */
- case RDS_CMD_READ:
- read_from_buf(s, a);
- break;
- /* --- poll() for /dev/radio --- */
- case RDS_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 */
- break;
- }
- return 0;
-}
-
-/* ----------------------------------------------------------------------- */
-
-static struct i2c_driver driver = {
- .driver = {
- .name = "saa6588",
- },
- .id = -1, /* FIXME */
- .attach_adapter = saa6588_probe,
- .detach_client = saa6588_detach,
- .command = saa6588_command,
-};
-
-static struct i2c_client client_template = {
- .name = "saa6588",
- .driver = &driver,
-};
-
-static int __init saa6588_init_module(void)
-{
- return i2c_add_driver(&driver);
-}
-
-static void __exit saa6588_cleanup_module(void)
-{
- i2c_del_driver(&driver);
-}
-
-module_init(saa6588_init_module);
-module_exit(saa6588_cleanup_module);
-
-/*
- * Overrides for Emacs so that we follow Linus's tabbing style.
- * ---------------------------------------------------------------------------
- * Local variables:
- * c-basic-offset: 8
- * End:
- */
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