/* * For the TDA9875 chip * (The TDA9875 is used on the Diamond DTV2000 french version * Other cards probably use these chips as well.) * This driver will not complain if used with any * other i2c device with the same address. * * Copyright (c) 2000 Guillaume Delvit based on Gerd Knorr source and * Eric Sandeen * Copyright (c) 2006 Mauro Carvalho Chehab <mchehab@infradead.org> * This code is placed under the terms of the GNU General Public License * Based on tda9855.c by Steve VanDeBogart (vandebo@uclink.berkeley.edu) * Which was based on tda8425.c by Greg Alexander (c) 1998 * * OPTIONS: * debug - set to 1 if you'd like to see debug messages * * Revision: 0.1 - original version */ #include <linux/module.h> #include <linux/kernel.h> #include <linux/string.h> #include <linux/timer.h> #include <linux/delay.h> #include <linux/errno.h> #include <linux/slab.h> #include <linux/i2c.h> #include <linux/videodev2.h> #include <media/v4l2-device.h> #include <media/v4l2-i2c-drv.h> #include <media/i2c-addr.h> static int debug; /* insmod parameter */ module_param(debug, int, S_IRUGO | S_IWUSR); MODULE_LICENSE("GPL"); /* This is a superset of the TDA9875 */ struct tda9875 { struct v4l2_subdev sd; int rvol, lvol; int bass, treble; }; static inline struct tda9875 *to_state(struct v4l2_subdev *sd) { return container_of(sd, struct tda9875, sd); } #define dprintk if (debug) printk /* The TDA9875 is made by Philips Semiconductor * http://www.semiconductors.philips.com * TDA9875: I2C-bus controlled DSP audio processor, FM demodulator * */ /* subaddresses for TDA9875 */ #define TDA9875_MUT 0x12 /*General mute (value --> 0b11001100*/ #define TDA9875_CFG 0x01 /* Config register (value --> 0b00000000 */ #define TDA9875_DACOS 0x13 /*DAC i/o select (ADC) 0b0000100*/ #define TDA9875_LOSR 0x16 /*Line output select regirter 0b0100 0001*/ #define TDA9875_CH1V 0x0c /*Channel 1 volume (mute)*/ #define TDA9875_CH2V 0x0d /*Channel 2 volume (mute)*/ #define TDA9875_SC1 0x14 /*SCART 1 in (mono)*/ #define TDA9875_SC2 0x15 /*SCART 2 in (mono)*/ #define TDA9875_ADCIS 0x17 /*ADC input select (mono) 0b0110 000*/ #define TDA9875_AER 0x19 /*Audio effect (AVL+Pseudo) 0b0000 0110*/ #define TDA9875_MCS 0x18 /*Main channel select (DAC) 0b0000100*/ #define TDA9875_MVL 0x1a /* Main volume gauche */ #define TDA9875_MVR 0x1b /* Main volume droite */ #define TDA9875_MBA 0x1d /* Main Basse */ #define TDA9875_MTR 0x1e /* Main treble */ #define TDA9875_ACS 0x1f /* Auxilary channel select (FM) 0b0000000*/ #define TDA9875_AVL 0x20 /* Auxilary volume gauche */ #define TDA9875_AVR 0x21 /* Auxilary volume droite */ #define TDA9875_ABA 0x22 /* Auxilary Basse */ #define TDA9875_ATR 0x23 /* Auxilary treble */ #define TDA9875_MSR 0x02 /* Monitor select register */ #define TDA9875_C1MSB 0x03 /* Carrier 1 (FM) frequency register MSB */ #define TDA9875_C1MIB 0x04 /* Carrier 1 (FM) frequency register (16-8]b */ #define TDA9875_C1LSB 0x05 /* Carrier 1 (FM) frequency register LSB */ #define TDA9875_C2MSB 0x06 /* Carrier 2 (nicam) frequency register MSB */ #define TDA9875_C2MIB 0x07 /* Carrier 2 (nicam) frequency register (16-8]b */ #define TDA9875_C2LSB 0x08 /* Carrier 2 (nicam) frequency register LSB */ #define TDA9875_DCR 0x09 /* Demodulateur configuration regirter*/ #define TDA9875_DEEM 0x0a /* FM de-emphasis regirter*/ #define TDA9875_FMAT 0x0b /* FM Matrix regirter*/ /* values */ #define TDA9875_MUTE_ON 0xff /* general mute */ #define TDA9875_MUTE_OFF 0xcc /* general no mute */ /* Begin code */ static int tda9875_write(struct v4l2_subdev *sd, int subaddr, unsigned char val) { struct i2c_client *client = v4l2_get_subdevdata(sd); unsigned char buffer[2]; v4l2_dbg(1, debug, sd, "Writing %d 0x%x\n", subaddr, val); buffer[0] = subaddr; buffer[1] = val; if (2 != i2c_master_send(client, buffer, 2)) { v4l2_warn(sd, "I/O error, trying (write %d 0x%x)\n", subaddr, val); return -1; } return 0; } static int i2c_read_register(struct i2c_client *client, int addr, int reg) { unsigned char write[1]; unsigned char read[1]; struct i2c_msg msgs[2] = { { addr, 0, 1, write }, { addr, I2C_M_RD, 1, read } }; write[0] = reg; if (2 != i2c_transfer(client->adapter, msgs, 2)) { v4l_warn(client, "I/O error (read2)\n"); return -1; } v4l_dbg(1, debug, client, "chip_read2: reg%d=0x%x\n", reg, read[0]); return read[0]; } static void tda9875_set(struct v4l2_subdev *sd) { struct tda9875 *tda = to_state(sd); unsigned char a; v4l2_dbg(1, debug, sd, "tda9875_set(%04x,%04x,%04x,%04x)\n", tda->lvol, tda->rvol, tda->bass, tda->treble); a = tda->lvol & 0xff; tda9875_write(sd, TDA9875_MVL, a); a =tda->rvol & 0xff; tda9875_write(sd, TDA9875_MVR, a); a =tda->bass & 0xff; tda9875_write(sd, TDA9875_MBA, a); a =tda->treble & 0xff; tda9875_write(sd, TDA9875_MTR, a); } static void do_tda9875_init(struct v4l2_subdev *sd) { struct tda9875 *t = to_state(sd); v4l2_dbg(1, debug, sd, "In tda9875_init\n"); tda9875_write(sd, TDA9875_CFG, 0xd0); /*reg de config 0 (reset)*/ tda9875_write(sd, TDA9875_MSR, 0x03); /* Monitor 0b00000XXX*/ tda9875_write(sd, TDA9875_C1MSB, 0x00); /*Car1(FM) MSB XMHz*/ tda9875_write(sd, TDA9875_C1MIB, 0x00); /*Car1(FM) MIB XMHz*/ tda9875_write(sd, TDA9875_C1LSB, 0x00); /*Car1(FM) LSB XMHz*/ tda9875_write(sd, TDA9875_C2MSB, 0x00); /*Car2(NICAM) MSB XMHz*/ tda9875_write(sd, TDA9875_C2MIB, 0x00); /*Car2(NICAM) MIB XMHz*/ tda9875_write(sd, TDA9875_C2LSB, 0x00); /*Car2(NICAM) LSB XMHz*/ tda9875_write(sd, TDA9875_DCR, 0x00); /*Demod config 0x00*/ tda9875_write(sd, TDA9875_DEEM, 0x44); /*DE-Emph 0b0100 0100*/ tda9875_write(sd, TDA9875_FMAT, 0x00); /*FM Matrix reg 0x00*/ tda9875_write(sd, TDA9875_SC1, 0x00); /* SCART 1 (SC1)*/ tda9875_write(sd, TDA9875_SC2, 0x01); /* SCART 2 (sc2)*/ tda9875_write(sd, TDA9875_CH1V, 0x10); /* Channel volume 1 mute*/ tda9875_write(sd, TDA9875_CH2V, 0x10); /* Channel volume 2 mute */ tda9875_write(sd, TDA9875_DACOS, 0x02); /* sig DAC i/o(in:nicam)*/ tda9875_write(sd, TDA9875_ADCIS, 0x6f); /* sig ADC input(in:mono)*/ tda9875_write(sd, TDA9875_LOSR, 0x00); /* line out (in:mono)*/ tda9875_write(sd, TDA9875_AER, 0x00); /*06 Effect (AVL+PSEUDO) */ tda9875_write(sd, TDA9875_MCS, 0x44); /* Main ch select (DAC) */ tda9875_write(sd, TDA9875_MVL, 0x03); /* Vol Main left 10dB */ tda9875_write(sd, TDA9875_MVR, 0x03); /* Vol Main right 10dB*/ tda9875_write(sd, TDA9875_MBA, 0x00); /* Main Bass Main 0dB*/ tda9875_write(sd, TDA9875_MTR, 0x00); /* Main Treble Main 0dB*/ tda9875_write(sd, TDA9875_ACS, 0x44); /* Aux chan select (dac)*/ tda9875_write(sd, TDA9875_AVL, 0x00); /* Vol Aux left 0dB*/ tda9875_write(sd, TDA9875_AVR, 0x00); /* Vol Aux right 0dB*/ tda9875_write(sd, TDA9875_ABA, 0x00); /* Aux Bass Main 0dB*/ tda9875_write(sd, TDA9875_ATR, 0x00); /* Aux Aigus Main 0dB*/ tda9875_write(sd, TDA9875_MUT, 0xcc); /* General mute */ t->lvol = t->rvol = 0; /* 0dB */ t->bass = 0; /* 0dB */ t->treble = 0; /* 0dB */ tda9875_set(sd); } static int tda9875_g_ctrl(struct v4l2_subdev *sd, struct v4l2_control *ctrl) { struct tda9875 *t = to_state(sd); switch (ctrl->id) { case V4L2_CID_AUDIO_VOLUME: { int left = (t->lvol+84)*606; int right = (t->rvol+84)*606; ctrl->value=max(left,right); return 0; } case V4L2_CID_AUDIO_BALANCE: { int left = (t->lvol+84)*606; int right = (t->rvol+84)*606; int volume = max(left,right); int balance = (32768*min(left,right))/ (volume ? volume : 1); ctrl->value=(left<right)? (65535-balance) : balance; return 0; } case V4L2_CID_AUDIO_BASS: ctrl->value = (t->bass+12)*2427; /* min -12 max +15 */ return 0; case V4L2_CID_AUDIO_TREBLE: ctrl->value = (t->treble+12)*2730;/* min -12 max +12 */ return 0; } return -EINVAL; } static int tda9875_s_ctrl(struct v4l2_subdev *sd, struct v4l2_control *ctrl) { struct tda9875 *t = to_state(sd); int chvol = 0, volume = 0, balance = 0, left, right; switch (ctrl->id) { case V4L2_CID_AUDIO_VOLUME: left = (t->lvol+84)*606; right = (t->rvol+84)*606; volume = max(left,right); balance = (32768*min(left,right))/ (volume ? volume : 1); balance =(left<right)? (65535-balance) : balance; volume = ctrl->value; chvol=1; break; case V4L2_CID_AUDIO_BALANCE: left = (t->lvol+84)*606; right = (t->rvol+84)*606; volume=max(left,right); balance = ctrl->value; chvol=1; break; case V4L2_CID_AUDIO_BASS: t->bass = ((ctrl->value/2400)-12) & 0xff; if (t->bass > 15) t->bass = 15; if (t->bass < -12) t->bass = -12 & 0xff; break; case V4L2_CID_AUDIO_TREBLE: t->treble = ((ctrl->value/2700)-12) & 0xff; if (t->treble > 12) t->treble = 12; if (t->treble < -12) t->treble = -12 & 0xff; break; default: return -EINVAL; } if (chvol) { left = (min(65536 - balance,32768) * volume) / 32768; right = (min(balance,32768) * volume) / 32768; t->lvol = ((left/606)-84) & 0xff; if (t->lvol > 24) t->lvol = 24; if (t->lvol < -84) t->lvol = -84 & 0xff; t->rvol = ((right/606)-84) & 0xff; if (t->rvol > 24) t->rvol = 24; if (t->rvol < -84) t->rvol = -84 & 0xff; } tda9875_set(sd); return 0; } static int tda9875_queryctrl(struct v4l2_subdev *sd, struct v4l2_queryctrl *qc) { switch (qc->id) { case V4L2_CID_AUDIO_VOLUME: return v4l2_ctrl_query_fill(qc, 0, 65535, 65535 / 100, 58880); case V4L2_CID_AUDIO_BASS: case V4L2_CID_AUDIO_TREBLE: return v4l2_ctrl_query_fill(qc, 0, 65535, 65535 / 100, 32768); } return -EINVAL; } /* ----------------------------------------------------------------------- */ static const struct v4l2_subdev_core_ops tda9875_core_ops = { .queryctrl = tda9875_queryctrl, .g_ctrl = tda9875_g_ctrl, .s_ctrl = tda9875_s_ctrl, }; static const struct v4l2_subdev_ops tda9875_ops = { .core = &tda9875_core_ops, }; /* ----------------------------------------------------------------------- */ /* *********************** * * i2c interface functions * * *********************** */ static int tda9875_checkit(struct i2c_client *client, int addr) { int dic, rev; dic = i2c_read_register(client, addr, 254); rev = i2c_read_register(client, addr, 255); if (dic == 0 || dic == 2) { /* tda9875 and tda9875A */ v4l_info(client, "tda9875%s rev. %d detected at 0x%02x\n", dic == 0 ? "" : "A", rev, addr << 1); return 1; } v4l_info(client, "no such chip at 0x%02x (dic=0x%x rev=0x%x)\n", addr << 1, dic, rev); return 0; } static int tda9875_probe(struct i2c_client *client, const struct i2c_device_id *id) { struct tda9875 *t; struct v4l2_subdev *sd; v4l_info(client, "chip found @ 0x%02x (%s)\n", client->addr << 1, client->adapter->name); if (!tda9875_checkit(client, client->addr)) return -ENODEV; t = kzalloc(sizeof(*t), GFP_KERNEL); if (!t) return -ENOMEM; sd = &t->sd; v4l2_i2c_subdev_init(sd, client, &tda9875_ops); do_tda9875_init(sd); return 0; } static int tda9875_remove(struct i2c_client *client) { struct v4l2_subdev *sd = i2c_get_clientdata(client); do_tda9875_init(sd); v4l2_device_unregister_subdev(sd); kfree(to_state(sd)); return 0; } static const struct i2c_device_id tda9875_id[] = { { "tda9875", 0 }, { } }; MODULE_DEVICE_TABLE(i2c, tda9875_id); static struct v4l2_i2c_driver_data v4l2_i2c_data = { .name = "tda9875", .probe = tda9875_probe, .remove = tda9875_remove, .id_table = tda9875_id, };