diff options
Diffstat (limited to 'drivers/media/dvb/frontends/au8522.c')
-rw-r--r-- | drivers/media/dvb/frontends/au8522.c | 448 |
1 files changed, 448 insertions, 0 deletions
diff --git a/drivers/media/dvb/frontends/au8522.c b/drivers/media/dvb/frontends/au8522.c new file mode 100644 index 0000000..d3c44b9 --- /dev/null +++ b/drivers/media/dvb/frontends/au8522.c @@ -0,0 +1,448 @@ +/* + Auvitek AU8522 QAM/8VSB demodulator driver + + Copyright (C) 2008 Steven Toth <stoth@hauppauge.com> + + 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/kernel.h> +#include <linux/init.h> +#include <linux/module.h> +#include <linux/string.h> +#include <linux/slab.h> +#include <linux/delay.h> +#include "dvb_frontend.h" +#include "dvb-pll.h" +#include "au8522.h" + +struct au8522_state { + + struct i2c_adapter* i2c; + + /* configuration settings */ + const struct au8522_config* config; + + struct dvb_frontend frontend; + + u32 current_frequency; + fe_modulation_t current_modulation; + +}; + +static int debug = 0; +#define dprintk if (debug) printk + +/* 16 bit registers, 8 bit values */ +static int au8522_writereg(struct au8522_state* state, u16 reg, u8 data) +{ + int ret; + u8 buf [] = { reg >> 8, reg & 0xff, data }; + + struct i2c_msg msg = { .addr = state->config->demod_address, + .flags = 0, .buf = buf, .len = 3 }; + + ret = i2c_transfer(state->i2c, &msg, 1); + + if (ret != 1) + printk("%s: writereg error (reg == 0x%02x, val == 0x%04x, " + "ret == %i)\n", __FUNCTION__, reg, data, ret); + + return (ret != 1) ? -1 : 0; +} + +static u8 au8522_readreg(struct au8522_state* state, u16 reg) +{ + int ret; + u8 b0 [] = { reg >> 8, reg & 0xff }; + u8 b1 [] = { 0 }; + + struct i2c_msg msg [] = { + { .addr = state->config->demod_address, .flags = 0, + .buf = b0, .len = 2 }, + { .addr = state->config->demod_address, .flags = I2C_M_RD, + .buf = b1, .len = 1 } }; + + ret = i2c_transfer(state->i2c, msg, 2); + + if (ret != 2) + printk("%s: readreg error (ret == %i)\n", __FUNCTION__, ret); + return b1[0]; +} + +static int au8522_i2c_gate_ctrl(struct dvb_frontend* fe, int enable) +{ + struct au8522_state* state = fe->demodulator_priv; + + dprintk("%s(%d)\n", __FUNCTION__, enable); + + if (enable) + return au8522_writereg(state, 0x106, 1); + else + return au8522_writereg(state, 0x106, 0); +} + +static int au8522_enable_modulation(struct dvb_frontend* fe, + fe_modulation_t m) +{ + struct au8522_state* state = fe->demodulator_priv; + + dprintk("%s(0x%08x)\n", __FUNCTION__, m); + + switch(m) { + case VSB_8: + dprintk("%s() VSB_8\n", __FUNCTION__); + + //au8522_writereg(state, 0x410b, 0x84); // Serial + + //au8522_writereg(state, 0x8090, 0x82); + au8522_writereg(state, 0x8090, 0x84); + au8522_writereg(state, 0x4092, 0x11); + au8522_writereg(state, 0x2005, 0x00); + au8522_writereg(state, 0x8091, 0x80); + + au8522_writereg(state, 0x80a3, 0x0c); + au8522_writereg(state, 0x80a4, 0xe8); + au8522_writereg(state, 0x8081, 0xc4); + au8522_writereg(state, 0x80a5, 0x40); + au8522_writereg(state, 0x80a7, 0x40); + au8522_writereg(state, 0x80a6, 0x67); + au8522_writereg(state, 0x8262, 0x20); + au8522_writereg(state, 0x821c, 0x30); + au8522_writereg(state, 0x80d8, 0x1a); + au8522_writereg(state, 0x8227, 0xa0); + au8522_writereg(state, 0x8121, 0xff); + au8522_writereg(state, 0x80a8, 0xf0); + au8522_writereg(state, 0x80a9, 0x05); + au8522_writereg(state, 0x80aa, 0x77); + au8522_writereg(state, 0x80ab, 0xf0); + au8522_writereg(state, 0x80ac, 0x05); + au8522_writereg(state, 0x80ad, 0x77); + au8522_writereg(state, 0x80ae, 0x41); + au8522_writereg(state, 0x80af, 0x66); + au8522_writereg(state, 0x821b, 0xcc); + au8522_writereg(state, 0x821d, 0x80); + au8522_writereg(state, 0x80b5, 0xfb); + au8522_writereg(state, 0x80b6, 0x8e); + au8522_writereg(state, 0x80b7, 0x39); + au8522_writereg(state, 0x80a4, 0xe8); + au8522_writereg(state, 0x8231, 0x13); + break; + case QAM_64: + case QAM_256: + au8522_writereg(state, 0x80a3, 0x09); + au8522_writereg(state, 0x80a4, 0x00); + au8522_writereg(state, 0x8081, 0xc4); + au8522_writereg(state, 0x80a5, 0x40); + au8522_writereg(state, 0x80b5, 0xfb); + au8522_writereg(state, 0x80b6, 0x8e); + au8522_writereg(state, 0x80b7, 0x39); + au8522_writereg(state, 0x80aa, 0x77); + au8522_writereg(state, 0x80ad, 0x77); + au8522_writereg(state, 0x80a6, 0x67); + au8522_writereg(state, 0x8262, 0x20); + au8522_writereg(state, 0x821c, 0x30); + au8522_writereg(state, 0x80b8, 0x3e); + au8522_writereg(state, 0x80b9, 0xf0); + au8522_writereg(state, 0x80ba, 0x01); + au8522_writereg(state, 0x80bb, 0x18); + au8522_writereg(state, 0x80bc, 0x50); + au8522_writereg(state, 0x80bd, 0x00); + au8522_writereg(state, 0x80be, 0xea); + au8522_writereg(state, 0x80bf, 0xef); + au8522_writereg(state, 0x80c0, 0xfc); + au8522_writereg(state, 0x80c1, 0xbd); + au8522_writereg(state, 0x80c2, 0x1f); + au8522_writereg(state, 0x80c3, 0xfc); + au8522_writereg(state, 0x80c4, 0xdd); + au8522_writereg(state, 0x80c5, 0xaf); + au8522_writereg(state, 0x80c6, 0x00); + au8522_writereg(state, 0x80c7, 0x38); + au8522_writereg(state, 0x80c8, 0x30); + au8522_writereg(state, 0x80c9, 0x05); + au8522_writereg(state, 0x80ca, 0x4a); + au8522_writereg(state, 0x80cb, 0xd0); + au8522_writereg(state, 0x80cc, 0x01); + au8522_writereg(state, 0x80cd, 0xd9); + au8522_writereg(state, 0x80ce, 0x6f); + au8522_writereg(state, 0x80cf, 0xf9); + au8522_writereg(state, 0x80d0, 0x70); + au8522_writereg(state, 0x80d1, 0xdf); + au8522_writereg(state, 0x80d2, 0xf7); + au8522_writereg(state, 0x80d3, 0xc2); + au8522_writereg(state, 0x80d4, 0xdf); + au8522_writereg(state, 0x80d5, 0x02); + au8522_writereg(state, 0x80d6, 0x9a); + au8522_writereg(state, 0x80d7, 0xd0); + au8522_writereg(state, 0x8250, 0x0d); + au8522_writereg(state, 0x8251, 0xcd); + au8522_writereg(state, 0x8252, 0xe0); + au8522_writereg(state, 0x8253, 0x05); + au8522_writereg(state, 0x8254, 0xa7); + au8522_writereg(state, 0x8255, 0xff); + au8522_writereg(state, 0x8256, 0xed); + au8522_writereg(state, 0x8257, 0x5b); + au8522_writereg(state, 0x8258, 0xae); + au8522_writereg(state, 0x8259, 0xe6); + au8522_writereg(state, 0x825a, 0x3d); + au8522_writereg(state, 0x825b, 0x0f); + au8522_writereg(state, 0x825c, 0x0d); + au8522_writereg(state, 0x825d, 0xea); + au8522_writereg(state, 0x825e, 0xf2); + au8522_writereg(state, 0x825f, 0x51); + au8522_writereg(state, 0x8260, 0xf5); + au8522_writereg(state, 0x8261, 0x06); + au8522_writereg(state, 0x821a, 0x00); + au8522_writereg(state, 0x8546, 0x40); + au8522_writereg(state, 0x8210, 0x26); + au8522_writereg(state, 0x8211, 0xf6); + au8522_writereg(state, 0x8212, 0x84); + au8522_writereg(state, 0x8213, 0x02); + au8522_writereg(state, 0x8502, 0x01); + au8522_writereg(state, 0x8121, 0x04); + au8522_writereg(state, 0x8122, 0x04); + au8522_writereg(state, 0x852e, 0x10); + au8522_writereg(state, 0x80a4, 0xca); + au8522_writereg(state, 0x80a7, 0x40); + au8522_writereg(state, 0x8526, 0x01); + break; + default: + dprintk("%s() Invalid modulation\n", __FUNCTION__); + return -EINVAL; + } + + state->current_modulation = m; + + return 0; +} + +/* Talk to the demod, set the FEC, GUARD, QAM settings etc */ +static int au8522_set_frontend (struct dvb_frontend* fe, + struct dvb_frontend_parameters *p) +{ + struct au8522_state* state = fe->demodulator_priv; + + dprintk("%s(frequency=%d)\n", __FUNCTION__, p->frequency); + + state->current_frequency = p->frequency; + + au8522_enable_modulation(fe, p->u.vsb.modulation); + + /* Allow the demod to settle */ + msleep(100); + + if (fe->ops.tuner_ops.set_params) { + if (fe->ops.i2c_gate_ctrl) fe->ops.i2c_gate_ctrl(fe, 1); + fe->ops.tuner_ops.set_params(fe, p); + if (fe->ops.i2c_gate_ctrl) fe->ops.i2c_gate_ctrl(fe, 0); + } + + return 0; +} + +/* Reset the demod hardware and reset all of the configuration registers + to a default state. */ +static int au8522_init(struct dvb_frontend* fe) +{ + struct au8522_state* state = fe->demodulator_priv; + dprintk("%s()\n", __FUNCTION__); + + au8522_writereg(state, 0xa4, 1 << 5); + + au8522_i2c_gate_ctrl(fe, 1); + + return 0; +} + +static int au8522_read_status(struct dvb_frontend* fe, fe_status_t* status) +{ + struct au8522_state* state = fe->demodulator_priv; + u8 reg; + u32 tuner_status = 0; + + *status = 0; + + if (state->current_modulation == VSB_8) { + dprintk("%s() Checking VSB_8\n", __FUNCTION__); + //au8522_writereg(state, 0x80a4, 0x20); + reg = au8522_readreg(state, 0x4088); + if(reg & 0x01) + *status |= FE_HAS_VITERBI; + if(reg & 0x02) + *status |= FE_HAS_LOCK | FE_HAS_SYNC; + } else { + dprintk("%s() Checking QAM\n", __FUNCTION__); + reg = au8522_readreg(state, 0x4541); + if(reg & 0x80) + *status |= FE_HAS_VITERBI; + if(reg & 0x20) + *status |= FE_HAS_LOCK | FE_HAS_SYNC; + } + + switch(state->config->status_mode) { + case AU8522_DEMODLOCKING: + dprintk("%s() DEMODLOCKING\n", __FUNCTION__); + if (*status & FE_HAS_VITERBI) + *status |= FE_HAS_CARRIER | FE_HAS_SIGNAL; + break; + case AU8522_TUNERLOCKING: + /* Get the tuner status */ + dprintk("%s() TUNERLOCKING\n", __FUNCTION__); + if (fe->ops.tuner_ops.get_status) { + if (fe->ops.i2c_gate_ctrl) + fe->ops.i2c_gate_ctrl(fe, 1); + + fe->ops.tuner_ops.get_status(fe, &tuner_status); + + if (fe->ops.i2c_gate_ctrl) + fe->ops.i2c_gate_ctrl(fe, 0); + } + if (tuner_status) + *status |= FE_HAS_CARRIER | FE_HAS_SIGNAL; + break; + } + + dprintk("%s() status 0x%08x\n", __FUNCTION__, *status); + + return 0; +} + +static int au8522_read_snr(struct dvb_frontend* fe, u16* snr) +{ + dprintk("%s()\n", __FUNCTION__); + + *snr = 0; + + return 0; +} + +static int au8522_read_signal_strength(struct dvb_frontend* fe, + u16* signal_strength) +{ + return au8522_read_snr(fe, signal_strength); +} + +static int au8522_read_ucblocks(struct dvb_frontend* fe, u32* ucblocks) +{ + struct au8522_state* state = fe->demodulator_priv; + + *ucblocks = au8522_readreg(state, 0x4087); + + return 0; +} + +static int au8522_read_ber(struct dvb_frontend* fe, u32* ber) +{ + return au8522_read_ucblocks(fe, ber); +} + +static int au8522_get_frontend(struct dvb_frontend* fe, + struct dvb_frontend_parameters *p) +{ + struct au8522_state* state = fe->demodulator_priv; + + p->frequency = state->current_frequency; + p->u.vsb.modulation = state->current_modulation; + + return 0; +} + +static int au8522_get_tune_settings(struct dvb_frontend* fe, + struct dvb_frontend_tune_settings *tune) +{ + tune->min_delay_ms = 1000; + return 0; +} + +static void au8522_release(struct dvb_frontend* fe) +{ + struct au8522_state* state = fe->demodulator_priv; + kfree(state); +} + +static struct dvb_frontend_ops au8522_ops; + +struct dvb_frontend* au8522_attach(const struct au8522_config* config, + struct i2c_adapter* i2c) +{ + struct au8522_state* state = NULL; + + /* allocate memory for the internal state */ + state = kmalloc(sizeof(struct au8522_state), GFP_KERNEL); + if (state == NULL) + goto error; + + /* setup the state */ + state->config = config; + state->i2c = i2c; + /* create dvb_frontend */ + memcpy(&state->frontend.ops, &au8522_ops, + sizeof(struct dvb_frontend_ops)); + state->frontend.demodulator_priv = state; + + if (au8522_init(&state->frontend) != 0) { + printk(KERN_ERR "%s: Failed to initialize correctly\n", + __FUNCTION__); + goto error; + } + + /* Note: Leaving the I2C gate open here. */ + au8522_i2c_gate_ctrl(&state->frontend, 1); + + return &state->frontend; + +error: + kfree(state); + return NULL; +} + +static struct dvb_frontend_ops au8522_ops = { + + .info = { + .name = "Auvitek AU8522 QAM/8VSB Frontend", + .type = FE_ATSC, + .frequency_min = 54000000, + .frequency_max = 858000000, + .frequency_stepsize = 62500, + .caps = FE_CAN_QAM_64 | FE_CAN_QAM_256 | FE_CAN_8VSB + }, + + .init = au8522_init, + .i2c_gate_ctrl = au8522_i2c_gate_ctrl, + .set_frontend = au8522_set_frontend, + .get_frontend = au8522_get_frontend, + .get_tune_settings = au8522_get_tune_settings, + .read_status = au8522_read_status, + .read_ber = au8522_read_ber, + .read_signal_strength = au8522_read_signal_strength, + .read_snr = au8522_read_snr, + .read_ucblocks = au8522_read_ucblocks, + .release = au8522_release, +}; + +module_param(debug, int, 0644); +MODULE_PARM_DESC(debug, "Enable verbose debug messages"); + +MODULE_DESCRIPTION("Auvitek AU8522 QAM-B/ATSC Demodulator driver"); +MODULE_AUTHOR("Steven Toth"); +MODULE_LICENSE("GPL"); + +EXPORT_SYMBOL(au8522_attach); + +/* + * Local variables: + * c-basic-offset: 8 + */ |