patch-2.1.94 linux/drivers/char/msp3400.c
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- Lines: 924
- Date:
Wed Apr 8 17:24:48 1998
- Orig file:
v2.1.93/linux/drivers/char/msp3400.c
- Orig date:
Wed Dec 31 16:00:00 1969
diff -u --recursive --new-file v2.1.93/linux/drivers/char/msp3400.c linux/drivers/char/msp3400.c
@@ -0,0 +1,923 @@
+/*
+ * programming the msp34* sound processor family
+ *
+ * (c) 1997,1998 Gerd Knorr <kraxel@cs.tu-berlin.de>
+ *
+ * what works and what doesn't:
+ *
+ * AM-Mono
+ * probably doesn't (untested)
+ *
+ * FM-Mono
+ * should work. The stereo modes are backward compatible to FM-mono,
+ * therefore FM-Mono should be allways available.
+ *
+ * FM-Stereo (B/G, used in germany)
+ * should work, with autodetect
+ *
+ * FM-Stereo (satellite)
+ * should work, no autodetect (i.e. default is mono, but you can
+ * switch to stereo -- untested)
+ *
+ * NICAM (B/G, used in UK, Scandinavia and Spain)
+ * should work, with autodetect. Support for NICAM was added by
+ * Pekka Pietikainen <pp@netppl.fi>
+ *
+ *
+ * TODO:
+ * - better SAT support
+ *
+ */
+
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/sched.h>
+#include <linux/string.h>
+#include <linux/timer.h>
+#include <linux/delay.h>
+#include <linux/errno.h>
+#include <linux/malloc.h>
+/* #include <asm/smp_lock.h> */
+
+/* kernel_thread */
+#define __KERNEL_SYSCALLS__
+#include <linux/unistd.h>
+
+#include "i2c.h"
+#include <linux/videodev.h>
+
+#include "msp3400.h"
+
+int debug = 0; /* insmod parameter */
+
+struct msp3400c
+{
+ struct i2c_bus *bus;
+
+ int nicam;
+ int mode;
+ int norm;
+ int volume;
+ int stereo;
+
+ /* thread */
+ struct task_struct *thread;
+ struct semaphore *wait;
+ struct semaphore *notify;
+ int active,restart,rmmod;
+};
+
+#define VIDEO_MODE_RADIO 16 /* norm magic for radio mode */
+
+/* ---------------------------------------------------------------------- */
+
+#define dprintk if (debug) printk
+
+MODULE_PARM(debug,"i");
+
+/* ---------------------------------------------------------------------- */
+
+#define I2C_MSP3400C 0x80
+#define I2C_MSP3400C_DEM 0x10
+#define I2C_MSP3400C_DFP 0x12
+
+/* ----------------------------------------------------------------------- */
+/* functions for talking to the MSP3400C Sound processor */
+
+static int msp3400c_reset(struct i2c_bus *bus)
+{
+ int ret = 0;
+
+ udelay(2000);
+ i2c_start(bus);
+ i2c_sendbyte(bus, I2C_MSP3400C,2000);
+ i2c_sendbyte(bus, 0x00,0);
+ i2c_sendbyte(bus, 0x80,0);
+ i2c_sendbyte(bus, 0x00,0);
+ i2c_stop(bus);
+ udelay(2000);
+ i2c_start(bus);
+ if (0 != i2c_sendbyte(bus, I2C_MSP3400C,2000) ||
+ 0 != i2c_sendbyte(bus, 0x00,0) ||
+ 0 != i2c_sendbyte(bus, 0x00,0) ||
+ 0 != i2c_sendbyte(bus, 0x00,0))
+ {
+ ret = -1;
+ printk(KERN_ERR "msp3400: chip reset failed, penguin on i2c bus?\n");
+ }
+ i2c_stop(bus);
+ udelay(2000);
+ return ret;
+}
+
+static int msp3400c_read(struct i2c_bus *bus, int dev, int addr)
+{
+ int ret=0;
+ short val = 0;
+ i2c_start(bus);
+ if (0 != i2c_sendbyte(bus, I2C_MSP3400C,2000) ||
+ 0 != i2c_sendbyte(bus, dev+1, 0) ||
+ 0 != i2c_sendbyte(bus, addr >> 8, 0) ||
+ 0 != i2c_sendbyte(bus, addr & 0xff, 0))
+ {
+ ret = -1;
+ }
+ else
+ {
+ i2c_start(bus);
+ if (0 != i2c_sendbyte(bus, I2C_MSP3400C+1,2000))
+ {
+ ret = -1;
+ }
+ else
+ {
+ val |= (int)i2c_readbyte(bus,0) << 8;
+ val |= (int)i2c_readbyte(bus,1);
+ }
+ }
+ i2c_stop(bus);
+ if (-1 == ret)
+ {
+ printk(KERN_WARNING "msp3400: I/O error, trying reset (read %s 0x%x)\n",
+ (dev == I2C_MSP3400C_DEM) ? "Demod" : "Audio", addr);
+ msp3400c_reset(bus);
+ }
+ return val;
+}
+
+static int msp3400c_write(struct i2c_bus *bus, int dev, int addr, int val)
+{
+ int ret = 0;
+
+ i2c_start(bus);
+ if (0 != i2c_sendbyte(bus, I2C_MSP3400C,2000) ||
+ 0 != i2c_sendbyte(bus, dev, 0) ||
+ 0 != i2c_sendbyte(bus, addr >> 8, 0) ||
+ 0 != i2c_sendbyte(bus, addr & 0xff, 0) ||
+ 0 != i2c_sendbyte(bus, val >> 8, 0) ||
+ 0 != i2c_sendbyte(bus, val & 0xff, 0))
+ {
+ ret = -1;
+ }
+ i2c_stop(bus);
+ if (-1 == ret)
+ {
+ printk(KERN_ERR "msp3400: I/O error, trying reset (write %s 0x%x)\n",
+ (dev == I2C_MSP3400C_DEM) ? "Demod" : "Audio", addr);
+ msp3400c_reset(bus);
+ }
+ return ret;
+}
+
+/* ------------------------------------------------------------------------ */
+
+/* This macro is allowed for *constants* only, gcc must calculate it
+ at compile time. Remember -- no floats in kernel mode */
+#define MSP_CARRIER(freq) ((int)((float)(freq/18.432)*(1<<24)))
+
+#define MSP_MODE_AM_DETECT 0
+#define MSP_MODE_FM_RADIO 2
+#define MSP_MODE_FM_TERRA 3
+#define MSP_MODE_FM_SAT 4
+#define MSP_MODE_FM_NICAM1 5
+#define MSP_MODE_FM_NICAM2 6
+
+static struct MSP_INIT_DATA_DEM
+{
+ int fir1[6];
+ int fir2[6];
+ int cdo1;
+ int cdo2;
+ int ad_cv;
+ int mode_reg;
+ int dfp_src;
+ int dfp_matrix;
+} msp_init_data[] = {
+ /* AM (for carrier detect / msp3400) */
+ { { 75, 19, 36, 35, 39, 40 }, { 75, 19, 36, 35, 39, 40 },
+ MSP_CARRIER(5.5), MSP_CARRIER(5.5), 0x00d0, 0x0500, 0x0020, 0x3000},
+
+ /* AM (for carrier detect / msp3410) */
+ { { -1, -1, -8, 2, 59, 126 }, { -1, -1, -8, 2, 59, 126 },
+ MSP_CARRIER(5.5), MSP_CARRIER(5.5), 0x00d0, 0x0100, 0x0020, 0x3000},
+
+ /* FM Radio */
+ { { -8, -8, 4, 6, 78, 107 }, { -8, -8, 4, 6, 78, 107 },
+ MSP_CARRIER(10.7), MSP_CARRIER(10.7), 0x00d0, 0x0480, 0x0020, 0x3002 },
+
+ /* Terrestial FM-mono */
+ { { 3, 18, 27, 48, 66, 72 }, { 3, 18, 27, 48, 66, 72 },
+ MSP_CARRIER(5.5), MSP_CARRIER(5.5), 0x00d0, 0x0480, 0x0030, 0x3000},
+
+ /* Sat FM-mono */
+ { { 1, 9, 14, 24, 33, 37 }, { 3, 18, 27, 48, 66, 72 },
+ MSP_CARRIER(6.5), MSP_CARRIER(6.5), 0x00c6, 0x0480, 0x0000, 0x3000},
+
+ /* NICAM B/G, D/K */
+ { { -2, -8, -10, 10, 50, 86 }, { 3, 18, 27, 48, 66, 72 },
+ MSP_CARRIER(5.5), MSP_CARRIER(5.5), 0x00d0, 0x0040, 0x0120, 0x3000},
+
+ /* NICAM I */
+ { { 2, 4, -6, -4, 40, 94 }, { 3, 18, 27, 48, 66, 72 },
+ MSP_CARRIER(5.5), MSP_CARRIER(5.5), 0x00d0, 0x0040, 0x0120, 0x3000},
+};
+
+struct CARRIER_DETECT
+{
+ int cdo;
+ char *name;
+};
+
+static struct CARRIER_DETECT carrier_detect_main[] =
+{
+ /* main carrier */
+ { MSP_CARRIER(4.5), "4.5 NTSC" },
+ { MSP_CARRIER(5.5), "5.5 PAL B/G" },
+ { MSP_CARRIER(6.0), "6.0 PAL I" },
+ { MSP_CARRIER(6.5), "6.5 PAL SAT / SECAM" }
+};
+
+static struct CARRIER_DETECT carrier_detect_55[] = {
+ /* PAL B/G */
+ { MSP_CARRIER(5.7421875), "5.742 PAL B/G FM-stereo" },
+ { MSP_CARRIER(5.85), "5.85 PAL B/G NICAM" }
+};
+
+static struct CARRIER_DETECT carrier_detect_65[] = {
+ /* PAL SAT / SECAM */
+ { MSP_CARRIER(7.02), "7.02 PAL SAT FM-stereo s/b" },
+ { MSP_CARRIER(7.20), "7.20 PAL SAT FM-stereo s" },
+ { MSP_CARRIER(7.38), "7.38 PAL SAT FM-stereo b" },
+};
+
+#define CARRIER_COUNT(x) (sizeof(x)/sizeof(struct CARRIER_DETECT))
+
+/* ------------------------------------------------------------------------ */
+
+static void msp3400c_setcarrier(struct i2c_bus *bus, int cdo1, int cdo2)
+{
+ msp3400c_write(bus,I2C_MSP3400C_DEM, 0x0093, cdo1 & 0xfff);
+ msp3400c_write(bus,I2C_MSP3400C_DEM, 0x009b, cdo1 >> 12);
+ msp3400c_write(bus,I2C_MSP3400C_DEM, 0x00a3, cdo2 & 0xfff);
+ msp3400c_write(bus,I2C_MSP3400C_DEM, 0x00ab, cdo2 >> 12);
+}
+
+static void msp3400c_setvolume(struct i2c_bus *bus, int vol)
+{
+ int val = (vol * 0x73 / 65535) << 8;
+
+ dprintk("msp3400: setvolume: 0x%02x\n",val>>8);
+ msp3400c_write(bus,I2C_MSP3400C_DFP, 0x0000, val); /* loudspeaker */
+ msp3400c_write(bus,I2C_MSP3400C_DFP, 0x0006, val); /* headphones */
+ /* scart - on/off only */
+ msp3400c_write(bus,I2C_MSP3400C_DFP, 0x0007, val ? 0x4000 : 0);
+}
+
+static void msp3400c_setmode(struct msp3400c *msp, int type)
+{
+ int i;
+
+ dprintk("msp3400: setmode: %d\n",type);
+ msp->mode = type;
+ msp->stereo = VIDEO_SOUND_MONO;
+
+ msp3400c_write(msp->bus,I2C_MSP3400C_DEM, 0x00bb, /* ad_cv */
+ msp_init_data[type].ad_cv);
+
+ for (i = 5; i >= 0; i--) /* fir 1 */
+ msp3400c_write(msp->bus,I2C_MSP3400C_DEM, 0x0001,
+ msp_init_data[type].fir1[i]);
+
+ msp3400c_write(msp->bus,I2C_MSP3400C_DEM, 0x0005, 0x0004); /* fir 2 */
+ msp3400c_write(msp->bus,I2C_MSP3400C_DEM, 0x0005, 0x0040);
+ msp3400c_write(msp->bus,I2C_MSP3400C_DEM, 0x0005, 0x0000);
+ for (i = 5; i >= 0; i--)
+ msp3400c_write(msp->bus,I2C_MSP3400C_DEM, 0x0005,
+ msp_init_data[type].fir2[i]);
+
+ msp3400c_write(msp->bus,I2C_MSP3400C_DEM, 0x0083, /* MODE_REG */
+ msp_init_data[type].mode_reg);
+
+ msp3400c_setcarrier(msp->bus, msp_init_data[type].cdo1,
+ msp_init_data[type].cdo2);
+
+ msp3400c_write(msp->bus,I2C_MSP3400C_DFP, 0x0008,
+ msp_init_data[type].dfp_src);
+ msp3400c_write(msp->bus,I2C_MSP3400C_DFP, 0x0009,
+ msp_init_data[type].dfp_src);
+ msp3400c_write(msp->bus,I2C_MSP3400C_DFP, 0x000a,
+ msp_init_data[type].dfp_src);
+ msp3400c_write(msp->bus,I2C_MSP3400C_DFP, 0x000e,
+ msp_init_data[type].dfp_matrix);
+
+ if (msp->nicam)
+ {
+ /* msp3410 needs some more initialization */
+ msp3400c_write(msp->bus,I2C_MSP3400C_DFP, 0x0010, 0x3000);
+ }
+}
+
+static void msp3400c_setstereo(struct msp3400c *msp, int mode)
+{
+ int nicam=0; /* channel source: FM/AM or nicam */
+
+ /* switch demodulator */
+ switch (msp->mode)
+ {
+ case MSP_MODE_FM_TERRA:
+ dprintk("msp3400: B/G setstereo: %d\n",mode);
+ msp->stereo = mode;
+ msp3400c_setcarrier(msp->bus,MSP_CARRIER(5.7421875),MSP_CARRIER(5.5));
+ switch (mode)
+ {
+ case VIDEO_SOUND_STEREO:
+ msp3400c_write(msp->bus,I2C_MSP3400C_DFP, 0x000e, 0x3001);
+ break;
+ case VIDEO_SOUND_MONO:
+ case VIDEO_SOUND_LANG1:
+ case VIDEO_SOUND_LANG2:
+ msp3400c_write(msp->bus,I2C_MSP3400C_DFP, 0x000e, 0x3000);
+ break;
+ }
+ break;
+ case MSP_MODE_FM_SAT:
+ dprintk("msp3400: sat setstereo: %d\n",mode);
+ msp->stereo = mode;
+ switch (mode)
+ {
+ case VIDEO_SOUND_MONO:
+ msp3400c_setcarrier(msp->bus, MSP_CARRIER(6.5), MSP_CARRIER(6.5));
+ break;
+ case VIDEO_SOUND_STEREO:
+ msp3400c_setcarrier(msp->bus, MSP_CARRIER(7.2), MSP_CARRIER(7.02));
+ break;
+ case VIDEO_SOUND_LANG1:
+ msp3400c_setcarrier(msp->bus, MSP_CARRIER(7.38), MSP_CARRIER(7.02));
+ break;
+ case VIDEO_SOUND_LANG2:
+ msp3400c_setcarrier(msp->bus, MSP_CARRIER(7.38), MSP_CARRIER(7.02));
+ break;
+ }
+ break;
+ case MSP_MODE_FM_NICAM1:
+ dprintk("msp3400: NICAM1 setstereo: %d\n",mode);
+ msp->stereo = mode;
+ msp3400c_setcarrier(msp->bus,MSP_CARRIER(5.85),MSP_CARRIER(5.5));
+ nicam=0x0100;
+ break;
+ default:
+ /* can't do stereo - abort here */
+ return;
+ }
+
+ /* switch audio */
+ switch (mode)
+ {
+ case VIDEO_SOUND_STEREO:
+ msp3400c_write(msp->bus,I2C_MSP3400C_DFP, 0x0008, 0x0020|nicam);
+ msp3400c_write(msp->bus,I2C_MSP3400C_DFP, 0x0009, 0x0020|nicam);
+ msp3400c_write(msp->bus,I2C_MSP3400C_DFP, 0x000a, 0x0020|nicam);
+ msp3400c_write(msp->bus,I2C_MSP3400C_DFP, 0x0005, 0x4000);
+ break;
+ case VIDEO_SOUND_MONO:
+ case VIDEO_SOUND_LANG1:
+ msp3400c_write(msp->bus,I2C_MSP3400C_DFP, 0x0008, 0x0000|nicam);
+ msp3400c_write(msp->bus,I2C_MSP3400C_DFP, 0x0009, 0x0000|nicam);
+ msp3400c_write(msp->bus,I2C_MSP3400C_DFP, 0x000a, 0x0000|nicam);
+ break;
+ case VIDEO_SOUND_LANG2:
+ msp3400c_write(msp->bus,I2C_MSP3400C_DFP, 0x0008, 0x0010|nicam);
+ msp3400c_write(msp->bus,I2C_MSP3400C_DFP, 0x0009, 0x0010|nicam);
+ msp3400c_write(msp->bus,I2C_MSP3400C_DFP, 0x000a, 0x0010|nicam);
+ break;
+ }
+}
+
+/* ----------------------------------------------------------------------- */
+
+struct REGISTER_DUMP {
+ int addr;
+ char *name;
+};
+
+struct REGISTER_DUMP d1[] =
+{
+ { 0x007e, "autodetect" },
+ { 0x0023, "C_AD_BITS " },
+ { 0x0038, "ADD_BITS " },
+ { 0x003e, "CIB_BITS " },
+ { 0x0057, "ERROR_RATE" },
+};
+
+/*
+ * A kernel thread for msp3400 control -- we don't want to block the
+ * in the ioctl while doing the sound carrier & stereo detect
+ */
+
+int msp3400c_thread(void *data)
+{
+ unsigned long flags;
+ struct msp3400c *msp = data;
+ struct semaphore sem = MUTEX_LOCKED;
+
+ struct CARRIER_DETECT *cd;
+ int count, max1,max2,val1,val2, val,this, check_stereo;
+ int i;
+
+ /* lock_kernel(); */
+
+ exit_mm(current);
+ current->session = 1;
+ current->pgrp = 1;
+ sigfillset(¤t->blocked);
+ current->fs->umask = 0;
+ strcpy(current->comm,"msp3400");
+
+ msp->wait = &sem;
+ msp->thread = current;
+
+ /* unlock_kernel(); */
+
+ dprintk("msp3400: thread: start\n");
+ if(msp->notify != NULL)
+ up(msp->notify);
+
+ for (;;)
+ {
+ if (msp->rmmod)
+ goto done;
+ dprintk("msp3400: thread: sleep\n");
+ down_interruptible(&sem);
+ dprintk("msp3400: thread: wakeup\n");
+ if (msp->rmmod)
+ goto done;
+#if 0
+ if (VIDEO_MODE_RADIO == msp->norm)
+ {
+ msp->active = 1;
+ current->state = TASK_INTERRUPTIBLE;
+ current->timeout = jiffies + HZ/10;
+ schedule();
+ if (signal_pending(current))
+ goto done;
+ LOCK_I2C_BUS(msp->bus);
+ val1 = msp3400c_read(msp->bus, I2C_MSP3400C_DFP, 0x1b);
+ val2 = msp3400c_read(msp->bus, I2C_MSP3400C_DFP, 0x1c);
+ UNLOCK_I2C_BUS(msp->bus);
+ printk("msp3400: DC %d/%d\n",val1,val2);
+ msp->active = 0;
+ continue;
+ }
+#endif
+
+ if (VIDEO_MODE_RADIO == msp->norm)
+ continue; /* nothing to do */
+
+ msp->active = 1;
+restart:
+ LOCK_I2C_BUS(msp->bus);
+ msp3400c_setvolume(msp->bus, 0);
+ msp3400c_setmode(msp, MSP_MODE_AM_DETECT);
+ val1 = val2 = max1 = max2 = check_stereo = 0;
+
+ /* carrier detect pass #1 -- main carrier */
+ cd = carrier_detect_main; count = CARRIER_COUNT(carrier_detect_main);
+ for (this = 0; this < count; this++)
+ {
+ msp3400c_setcarrier(msp->bus, cd[this].cdo,cd[this].cdo);
+ UNLOCK_I2C_BUS(msp->bus);
+ current->state = TASK_INTERRUPTIBLE;
+ current->timeout = jiffies + HZ/25;
+ schedule();
+ if (signal_pending(current))
+ goto done;
+ if (msp->restart)
+ {
+ msp->restart = 0;
+ goto restart;
+ }
+
+ LOCK_I2C_BUS(msp->bus);
+ val = msp3400c_read(msp->bus, I2C_MSP3400C_DFP, 0x1b);
+ if (val1 < val)
+ val1 = val, max1 = this;
+ dprintk("msp3400: carrier1 val: %5d / %s\n", val,cd[this].name);
+ }
+
+ /* carrier detect pass #2 -- second (stereo) carrier */
+ switch (max1)
+ {
+ case 1: /* 5.5 */
+ cd = carrier_detect_55; count = CARRIER_COUNT(carrier_detect_55);
+ break;
+ case 3: /* 6.5 */
+ cd = carrier_detect_65; count = CARRIER_COUNT(carrier_detect_65);
+ break;
+ case 0: /* 4.5 */
+ case 2: /* 6.0 */
+ default:
+ cd = NULL; count = 0;
+ break;
+ }
+ for (this = 0; this < count; this++)
+ {
+ msp3400c_setcarrier(msp->bus, cd[this].cdo,cd[this].cdo);
+ UNLOCK_I2C_BUS(msp->bus);
+
+ current->state = TASK_INTERRUPTIBLE;
+ current->timeout = jiffies + HZ/25;
+ schedule();
+ if (signal_pending(current))
+ goto done;
+ if (msp->restart)
+ {
+ msp->restart = 0;
+ goto restart;
+ }
+
+ LOCK_I2C_BUS(msp->bus);
+ val = msp3400c_read(msp->bus, I2C_MSP3400C_DFP, 0x1b);
+ if (val2 < val)
+ val2 = val, max2 = this;
+ dprintk("msp3400: carrier2 val: %5d / %s\n", val,cd[this].name);
+ }
+
+ /* programm the msp3400 according to the results */
+ switch (max1)
+ {
+ case 0: /* 4.5 */
+ case 1: /* 5.5 */
+ msp3400c_setmode(msp, MSP_MODE_FM_TERRA);
+ msp3400c_setcarrier(msp->bus, carrier_detect_main[max1].cdo,
+ carrier_detect_main[max1].cdo);
+ if (max2 == 0)
+ {
+ /* B/G FM-stereo */
+ msp3400c_setstereo(msp, VIDEO_SOUND_MONO);
+ check_stereo = 1;
+ }
+ if (max2 == 1 && msp->nicam)
+ {
+ /* B/G NICAM */
+ msp3400c_setmode(msp, MSP_MODE_FM_NICAM1);
+ /* msp3400c_write(msp->bus, I2C_MSP3400C_DFP, 0x21, 0x01); */
+ msp3400c_setcarrier(msp->bus, MSP_CARRIER(5.85),
+ MSP_CARRIER(5.5));
+ check_stereo = 1;
+ }
+ break;
+ case 2: /* 6.0 */
+ case 3: /* 6.5 */
+ default:
+ msp3400c_setmode(msp, MSP_MODE_FM_TERRA);
+ msp3400c_setcarrier(msp->bus, carrier_detect_main[max1].cdo,
+ carrier_detect_main[max1].cdo);
+ msp3400c_setstereo(msp, VIDEO_SOUND_STEREO);
+ break;
+ }
+
+ /* unmute */
+ msp3400c_setvolume(msp->bus, msp->volume);
+
+ if (check_stereo)
+ {
+ /* stereo available -- check current mode */
+ UNLOCK_I2C_BUS(msp->bus);
+
+ current->state = TASK_INTERRUPTIBLE;
+ current->timeout = jiffies + HZ;
+ schedule();
+ if (signal_pending(current))
+ goto done;
+ if (msp->restart)
+ {
+ msp->restart = 0;
+ goto restart;
+ }
+
+ LOCK_I2C_BUS(msp->bus);
+ switch (msp->mode)
+ {
+ case MSP_MODE_FM_TERRA:
+ val = msp3400c_read(msp->bus, I2C_MSP3400C_DFP, 0x18);
+ dprintk("msp3400: stereo detect register: %d\n",val);
+
+ if (val > 4096)
+ {
+ msp3400c_setstereo(msp, VIDEO_SOUND_STEREO);
+ }
+ else if (val < -4096)
+ {
+ msp3400c_setstereo(msp, VIDEO_SOUND_LANG1);
+ }
+ else
+ {
+ msp3400c_setstereo(msp, VIDEO_SOUND_MONO);
+ }
+ break;
+ case MSP_MODE_FM_NICAM1:
+ val = msp3400c_read(msp->bus, I2C_MSP3400C_DEM, 0x23);
+ switch ((val & 0x1e) >> 1)
+ {
+ case 0:
+ case 8:
+ msp3400c_setstereo(msp, VIDEO_SOUND_STEREO);
+ break;
+ default:
+ msp3400c_setstereo(msp, VIDEO_SOUND_MONO);
+ break;
+ }
+
+ /* dump registers (for debugging) */
+ if (debug)
+ {
+ for (i=0; i<sizeof(d1)/sizeof(struct REGISTER_DUMP); i++)
+ {
+ val = msp3400c_read(msp->bus,I2C_MSP3400C_DEM, d1[i].addr);
+ printk(KERN_DEBUG "msp3400: %s = 0x%x\n",
+ d1[i].name,val);
+ }
+ }
+ break;
+ }
+ }
+ UNLOCK_I2C_BUS(msp->bus);
+ msp->active = 0;
+ }
+
+done:
+ dprintk("msp3400: thread: exit\n");
+ msp->wait = NULL;
+ msp->active = 0;
+ msp->thread = NULL;
+
+ if(msp->notify != NULL)
+ up(msp->notify);
+ return 0;
+}
+
+int msp3410d_thread(void *data)
+{
+ unsigned long flags;
+ struct msp3400c *msp = data;
+ struct semaphore sem = MUTEX_LOCKED;
+ int i, val;
+
+ /* lock_kernel(); */
+
+ exit_mm(current);
+ current->session = 1;
+ current->pgrp = 1;
+ sigfillset(¤t->blocked);
+ current->fs->umask = 0;
+ strcpy(current->comm,"msp3410 (nicam)");
+
+ msp->wait = &sem;
+ msp->thread = current;
+
+ /* unlock_kernel(); */
+
+ dprintk("msp3410: thread: start\n");
+ if(msp->notify != NULL)
+ up(msp->notify);
+
+ for (;;)
+ {
+ if (msp->rmmod)
+ goto done;
+ dprintk("msp3410: thread: sleep\n");
+ down_interruptible(&sem);
+ dprintk("msp3410: thread: wakeup\n");
+ if (msp->rmmod)
+ goto done;
+
+ if (VIDEO_MODE_RADIO == msp->norm)
+ continue; /* nothing to do */
+
+ msp->active = 1;
+
+restart:
+ LOCK_I2C_BUS(msp->bus);
+ /* mute */
+ msp3400c_setvolume(msp->bus, 0);
+ /* quick & dirty hack:
+ get the audio proccessor into some useful state */
+ msp3400c_setmode(msp, MSP_MODE_FM_NICAM1);
+ /* kick autodetect */
+ msp3400c_write(msp->bus, I2C_MSP3400C_DFP, 0x20, 0x01);
+ msp3400c_write(msp->bus, I2C_MSP3400C_DFP, 0x21, 0x01);
+ UNLOCK_I2C_BUS(msp->bus);
+
+ /* wait 1 sec */
+ current->state = TASK_INTERRUPTIBLE;
+ current->timeout = jiffies + HZ;
+ schedule();
+ if (signal_pending(current))
+ goto done;
+ if (msp->restart)
+ {
+ msp->restart = 0;
+ goto restart;
+ }
+
+ LOCK_I2C_BUS(msp->bus);
+ /* debug register dump */
+ for (i = 0; i < sizeof(d1)/sizeof(struct REGISTER_DUMP); i++)
+ {
+ val = msp3400c_read(msp->bus,I2C_MSP3400C_DEM,d1[i].addr);
+ printk(KERN_DEBUG "msp3400: %s = 0x%x\n",d1[i].name,val);
+ }
+ /* unmute */
+ msp3400c_setvolume(msp->bus, msp->volume);
+ UNLOCK_I2C_BUS(msp->bus);
+
+ msp->active = 0;
+ }
+
+done:
+ dprintk("msp3410: thread: exit\n");
+ msp->wait = NULL;
+ msp->active = 0;
+ msp->thread = NULL;
+
+ if(msp->notify != NULL)
+ up(msp->notify);
+ return 0;
+}
+
+/* ----------------------------------------------------------------------- */
+
+static int msp3400c_attach(struct i2c_device *device)
+{
+ unsigned long flags;
+ struct semaphore sem = MUTEX_LOCKED;
+ struct msp3400c *msp;
+ int rev1,rev2;
+
+ /*
+ * MSP3400's are for now only assumed to live on busses
+ * connected to a BT848. Adjust as and when you get new
+ * funky cards using these components.
+ */
+
+ if(device->bus->id != I2C_BUSID_BT848)
+ return -EINVAL;
+
+ device->data = msp = kmalloc(sizeof(struct msp3400c),GFP_KERNEL);
+ if (NULL == msp)
+ return -ENOMEM;
+ memset(msp,0,sizeof(struct msp3400c));
+ msp->bus = device->bus;
+ msp->volume = 65535;
+
+ LOCK_I2C_BUS(msp->bus);
+ if (-1 == msp3400c_reset(msp->bus))
+ {
+ UNLOCK_I2C_BUS(msp->bus);
+ kfree(msp);
+ return -1;
+ }
+
+ msp3400c_setmode(msp, MSP_MODE_FM_TERRA);
+ msp3400c_setvolume(msp->bus, msp->volume);
+
+ rev1 = msp3400c_read(msp->bus, I2C_MSP3400C_DFP, 0x1e);
+ rev2 = msp3400c_read(msp->bus, I2C_MSP3400C_DFP, 0x1f);
+
+#if 0
+ /* this will turn on a 1kHz beep - might be useful for debugging... */
+ msp3400c_write(msp->bus,I2C_MSP3400C_DFP, 0x0014, 0x1040);
+#endif
+ UNLOCK_I2C_BUS(msp->bus);
+
+ sprintf(device->name,"MSP34%02d%c-%c%d",
+ (rev2>>8)&0xff, (rev1&0xff)+'@', ((rev1>>8)&0xff)+'@', rev2&0x1f);
+ msp->nicam = (((rev2>>8)&0xff) == 10) ? 1 : 0;
+ printk(KERN_INFO "msp3400: init: chip=%s%s\n",
+ device->name, msp->nicam ? ", can decode nicam" : "");
+
+ MOD_INC_USE_COUNT;
+ /* startup control thread */
+ msp->notify = &sem;
+ kernel_thread(msp3400c_thread, (void *)msp, 0);
+ down(&sem);
+ msp->notify = NULL;
+ if (!msp->active)
+ up(msp->wait);
+ return 0;
+}
+
+static int msp3400c_detach(struct i2c_device *device)
+{
+ unsigned long flags;
+ struct semaphore sem = MUTEX_LOCKED;
+ struct msp3400c *msp = (struct msp3400c*)device->data;
+
+ /* shutdown control thread */
+ msp->notify = &sem;
+ msp->rmmod = 1;
+ if (!msp->active)
+ up(msp->wait);
+ down(&sem);
+ msp->notify = NULL;
+
+ LOCK_I2C_BUS(msp->bus);
+ msp3400c_reset(msp->bus);
+ UNLOCK_I2C_BUS(msp->bus);
+
+ kfree(msp);
+ MOD_DEC_USE_COUNT;
+ return 0;
+}
+
+static int msp3400c_command(struct i2c_device *device,
+ unsigned int cmd, void *arg)
+{
+ unsigned long flags;
+ struct msp3400c *msp = (struct msp3400c*)device->data;
+ int *iarg = (int*)arg;
+
+ switch (cmd)
+ {
+ case MSP_SET_RADIO:
+ msp->norm = VIDEO_MODE_RADIO;
+ LOCK_I2C_BUS(msp->bus);
+ msp3400c_setmode(msp,MSP_MODE_FM_RADIO);
+ msp3400c_setcarrier(msp->bus, MSP_CARRIER(10.7),MSP_CARRIER(10.7));
+ UNLOCK_I2C_BUS(msp->bus);
+ break;
+ case MSP_SET_TVNORM:
+ msp->norm = *iarg;
+ break;
+ case MSP_NEWCHANNEL:
+ if (!msp->active)
+ up(msp->wait);
+ else
+ msp->restart = 1;
+ break;
+
+ case MSP_GET_VOLUME:
+ *iarg = msp->volume;
+ break;
+ case MSP_SET_VOLUME:
+ msp->volume = *iarg;
+ LOCK_I2C_BUS(msp->bus);
+ msp3400c_setvolume(msp->bus,msp->volume);
+ UNLOCK_I2C_BUS(msp->bus);
+ break;
+
+ case MSP_GET_STEREO:
+ *iarg = msp->stereo;
+ break;
+ case MSP_SET_STEREO:
+ if (*iarg)
+ {
+ LOCK_I2C_BUS(msp->bus);
+ msp3400c_setstereo(msp,*iarg);
+ UNLOCK_I2C_BUS(msp->bus);
+ }
+ break;
+
+ case MSP_GET_DC:
+ LOCK_I2C_BUS(msp->bus);
+ *iarg = (int)msp3400c_read(msp->bus, I2C_MSP3400C_DFP, 0x1b) +
+ (int)msp3400c_read(msp->bus, I2C_MSP3400C_DFP, 0x1c);
+ UNLOCK_I2C_BUS(msp->bus);
+ break;
+
+ default:
+ return -EINVAL;
+ }
+ return 0;
+}
+
+/* ----------------------------------------------------------------------- */
+
+struct i2c_driver i2c_driver_msp =
+{
+ "msp3400", /* name */
+ I2C_DRIVERID_MSP3400, /* ID */
+ I2C_MSP3400C, I2C_MSP3400C, /* addr range */
+
+ msp3400c_attach,
+ msp3400c_detach,
+ msp3400c_command
+};
+
+#ifdef MODULE
+int init_module(void)
+#else
+int msp3400c_init(void)
+#endif
+{
+ i2c_register_driver(&i2c_driver_msp);
+ return 0;
+}
+
+#ifdef MODULE
+void cleanup_module(void)
+{
+ i2c_unregister_driver(&i2c_driver_msp);
+}
+#endif
+
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TCL-scripts by Sam Shen, slshen@lbl.gov