diff options
Diffstat (limited to 'drivers/media/dvb/frontends/lgs8gl5.c')
| -rw-r--r-- | drivers/media/dvb/frontends/lgs8gl5.c | 453 |
1 files changed, 0 insertions, 453 deletions
diff --git a/drivers/media/dvb/frontends/lgs8gl5.c b/drivers/media/dvb/frontends/lgs8gl5.c deleted file mode 100644 index 416cce3fefc7..000000000000 --- a/drivers/media/dvb/frontends/lgs8gl5.c +++ /dev/null @@ -1,453 +0,0 @@ -/* - Legend Silicon LGS-8GL5 DMB-TH OFDM demodulator driver - - Copyright (C) 2008 Sirius International (Hong Kong) Limited - Timothy Lee <timothy.lee@siriushk.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 "dvb_frontend.h" -#include "lgs8gl5.h" - - -#define REG_RESET 0x02 -#define REG_RESET_OFF 0x01 -#define REG_03 0x03 -#define REG_04 0x04 -#define REG_07 0x07 -#define REG_09 0x09 -#define REG_0A 0x0a -#define REG_0B 0x0b -#define REG_0C 0x0c -#define REG_37 0x37 -#define REG_STRENGTH 0x4b -#define REG_STRENGTH_MASK 0x7f -#define REG_STRENGTH_CARRIER 0x80 -#define REG_INVERSION 0x7c -#define REG_INVERSION_ON 0x80 -#define REG_7D 0x7d -#define REG_7E 0x7e -#define REG_A2 0xa2 -#define REG_STATUS 0xa4 -#define REG_STATUS_SYNC 0x04 -#define REG_STATUS_LOCK 0x01 - - -struct lgs8gl5_state { - struct i2c_adapter *i2c; - const struct lgs8gl5_config *config; - struct dvb_frontend frontend; -}; - - -static int debug; -#define dprintk(args...) \ - do { \ - if (debug) \ - printk(KERN_DEBUG "lgs8gl5: " args); \ - } while (0) - - -/* Writes into demod's register */ -static int -lgs8gl5_write_reg(struct lgs8gl5_state *state, u8 reg, u8 data) -{ - int ret; - u8 buf[] = {reg, data}; - struct i2c_msg msg = { - .addr = state->config->demod_address, - .flags = 0, - .buf = buf, - .len = 2 - }; - - ret = i2c_transfer(state->i2c, &msg, 1); - if (ret != 1) - dprintk("%s: error (reg=0x%02x, val=0x%02x, ret=%i)\n", - __func__, reg, data, ret); - return (ret != 1) ? -1 : 0; -} - - -/* Reads from demod's register */ -static int -lgs8gl5_read_reg(struct lgs8gl5_state *state, u8 reg) -{ - int ret; - u8 b0[] = {reg}; - u8 b1[] = {0}; - struct i2c_msg msg[2] = { - { - .addr = state->config->demod_address, - .flags = 0, - .buf = b0, - .len = 1 - }, - { - .addr = state->config->demod_address, - .flags = I2C_M_RD, - .buf = b1, - .len = 1 - } - }; - - ret = i2c_transfer(state->i2c, msg, 2); - if (ret != 2) - return -EIO; - - return b1[0]; -} - - -static int -lgs8gl5_update_reg(struct lgs8gl5_state *state, u8 reg, u8 data) -{ - lgs8gl5_read_reg(state, reg); - lgs8gl5_write_reg(state, reg, data); - return 0; -} - - -/* Writes into alternate device's register */ -/* TODO: Find out what that device is for! */ -static int -lgs8gl5_update_alt_reg(struct lgs8gl5_state *state, u8 reg, u8 data) -{ - int ret; - u8 b0[] = {reg}; - u8 b1[] = {0}; - u8 b2[] = {reg, data}; - struct i2c_msg msg[3] = { - { - .addr = state->config->demod_address + 2, - .flags = 0, - .buf = b0, - .len = 1 - }, - { - .addr = state->config->demod_address + 2, - .flags = I2C_M_RD, - .buf = b1, - .len = 1 - }, - { - .addr = state->config->demod_address + 2, - .flags = 0, - .buf = b2, - .len = 2 - }, - }; - - ret = i2c_transfer(state->i2c, msg, 3); - return (ret != 3) ? -1 : 0; -} - - -static void -lgs8gl5_soft_reset(struct lgs8gl5_state *state) -{ - u8 val; - - dprintk("%s\n", __func__); - - val = lgs8gl5_read_reg(state, REG_RESET); - lgs8gl5_write_reg(state, REG_RESET, val & ~REG_RESET_OFF); - lgs8gl5_write_reg(state, REG_RESET, val | REG_RESET_OFF); - msleep(5); -} - - -/* Starts demodulation */ -static void -lgs8gl5_start_demod(struct lgs8gl5_state *state) -{ - u8 val; - int n; - - dprintk("%s\n", __func__); - - lgs8gl5_update_alt_reg(state, 0xc2, 0x28); - lgs8gl5_soft_reset(state); - lgs8gl5_update_reg(state, REG_07, 0x10); - lgs8gl5_update_reg(state, REG_07, 0x10); - lgs8gl5_write_reg(state, REG_09, 0x0e); - lgs8gl5_write_reg(state, REG_0A, 0xe5); - lgs8gl5_write_reg(state, REG_0B, 0x35); - lgs8gl5_write_reg(state, REG_0C, 0x30); - - lgs8gl5_update_reg(state, REG_03, 0x00); - lgs8gl5_update_reg(state, REG_7E, 0x01); - lgs8gl5_update_alt_reg(state, 0xc5, 0x00); - lgs8gl5_update_reg(state, REG_04, 0x02); - lgs8gl5_update_reg(state, REG_37, 0x01); - lgs8gl5_soft_reset(state); - - /* Wait for carrier */ - for (n = 0; n < 10; n++) { - val = lgs8gl5_read_reg(state, REG_STRENGTH); - dprintk("Wait for carrier[%d] 0x%02X\n", n, val); - if (val & REG_STRENGTH_CARRIER) - break; - msleep(4); - } - if (!(val & REG_STRENGTH_CARRIER)) - return; - - /* Wait for lock */ - for (n = 0; n < 20; n++) { - val = lgs8gl5_read_reg(state, REG_STATUS); - dprintk("Wait for lock[%d] 0x%02X\n", n, val); - if (val & REG_STATUS_LOCK) - break; - msleep(12); - } - if (!(val & REG_STATUS_LOCK)) - return; - - lgs8gl5_write_reg(state, REG_7D, lgs8gl5_read_reg(state, REG_A2)); - lgs8gl5_soft_reset(state); -} - - -static int -lgs8gl5_init(struct dvb_frontend *fe) -{ - struct lgs8gl5_state *state = fe->demodulator_priv; - - dprintk("%s\n", __func__); - - lgs8gl5_update_alt_reg(state, 0xc2, 0x28); - lgs8gl5_soft_reset(state); - lgs8gl5_update_reg(state, REG_07, 0x10); - lgs8gl5_update_reg(state, REG_07, 0x10); - lgs8gl5_write_reg(state, REG_09, 0x0e); - lgs8gl5_write_reg(state, REG_0A, 0xe5); - lgs8gl5_write_reg(state, REG_0B, 0x35); - lgs8gl5_write_reg(state, REG_0C, 0x30); - - return 0; -} - - -static int -lgs8gl5_read_status(struct dvb_frontend *fe, fe_status_t *status) -{ - struct lgs8gl5_state *state = fe->demodulator_priv; - u8 level = lgs8gl5_read_reg(state, REG_STRENGTH); - u8 flags = lgs8gl5_read_reg(state, REG_STATUS); - - *status = 0; - - if ((level & REG_STRENGTH_MASK) > 0) - *status |= FE_HAS_SIGNAL; - if (level & REG_STRENGTH_CARRIER) - *status |= FE_HAS_CARRIER; - if (flags & REG_STATUS_SYNC) - *status |= FE_HAS_SYNC; - if (flags & REG_STATUS_LOCK) - *status |= FE_HAS_LOCK; - - return 0; -} - - -static int -lgs8gl5_read_ber(struct dvb_frontend *fe, u32 *ber) -{ - *ber = 0; - - return 0; -} - - -static int -lgs8gl5_read_signal_strength(struct dvb_frontend *fe, u16 *signal_strength) -{ - struct lgs8gl5_state *state = fe->demodulator_priv; - u8 level = lgs8gl5_read_reg(state, REG_STRENGTH); - *signal_strength = (level & REG_STRENGTH_MASK) << 8; - - return 0; -} - - -static int -lgs8gl5_read_snr(struct dvb_frontend *fe, u16 *snr) -{ - struct lgs8gl5_state *state = fe->demodulator_priv; - u8 level = lgs8gl5_read_reg(state, REG_STRENGTH); - *snr = (level & REG_STRENGTH_MASK) << 8; - - return 0; -} - - -static int -lgs8gl5_read_ucblocks(struct dvb_frontend *fe, u32 *ucblocks) -{ - *ucblocks = 0; - - return 0; -} - - -static int -lgs8gl5_set_frontend(struct dvb_frontend *fe) -{ - struct dtv_frontend_properties *p = &fe->dtv_property_cache; - struct lgs8gl5_state *state = fe->demodulator_priv; - - dprintk("%s\n", __func__); - - if (p->bandwidth_hz != 8000000) - return -EINVAL; - - if (fe->ops.tuner_ops.set_params) { - fe->ops.tuner_ops.set_params(fe); - if (fe->ops.i2c_gate_ctrl) - fe->ops.i2c_gate_ctrl(fe, 0); - } - - /* lgs8gl5_set_inversion(state, p->inversion); */ - - lgs8gl5_start_demod(state); - - return 0; -} - - -static int -lgs8gl5_get_frontend(struct dvb_frontend *fe) -{ - struct dtv_frontend_properties *p = &fe->dtv_property_cache; - struct lgs8gl5_state *state = fe->demodulator_priv; - u8 inv = lgs8gl5_read_reg(state, REG_INVERSION); - - p->inversion = (inv & REG_INVERSION_ON) ? INVERSION_ON : INVERSION_OFF; - - p->code_rate_HP = FEC_1_2; - p->code_rate_LP = FEC_7_8; - p->guard_interval = GUARD_INTERVAL_1_32; - p->transmission_mode = TRANSMISSION_MODE_2K; - p->modulation = QAM_64; - p->hierarchy = HIERARCHY_NONE; - p->bandwidth_hz = 8000000; - - return 0; -} - - -static int -lgs8gl5_get_tune_settings(struct dvb_frontend *fe, - struct dvb_frontend_tune_settings *fesettings) -{ - fesettings->min_delay_ms = 240; - fesettings->step_size = 0; - fesettings->max_drift = 0; - return 0; -} - - -static void -lgs8gl5_release(struct dvb_frontend *fe) -{ - struct lgs8gl5_state *state = fe->demodulator_priv; - kfree(state); -} - - -static struct dvb_frontend_ops lgs8gl5_ops; - - -struct dvb_frontend* -lgs8gl5_attach(const struct lgs8gl5_config *config, struct i2c_adapter *i2c) -{ - struct lgs8gl5_state *state = NULL; - - dprintk("%s\n", __func__); - - /* Allocate memory for the internal state */ - state = kzalloc(sizeof(struct lgs8gl5_state), GFP_KERNEL); - if (state == NULL) - goto error; - - /* Setup the state */ - state->config = config; - state->i2c = i2c; - - /* Check if the demod is there */ - if (lgs8gl5_read_reg(state, REG_RESET) < 0) - goto error; - - /* Create dvb_frontend */ - memcpy(&state->frontend.ops, &lgs8gl5_ops, - sizeof(struct dvb_frontend_ops)); - state->frontend.demodulator_priv = state; - return &state->frontend; - -error: - kfree(state); - return NULL; -} -EXPORT_SYMBOL(lgs8gl5_attach); - - -static struct dvb_frontend_ops lgs8gl5_ops = { - .delsys = { SYS_DTMB }, - .info = { - .name = "Legend Silicon LGS-8GL5 DMB-TH", - .frequency_min = 474000000, - .frequency_max = 858000000, - .frequency_stepsize = 10000, - .frequency_tolerance = 0, - .caps = FE_CAN_FEC_AUTO | - FE_CAN_QPSK | FE_CAN_QAM_16 | FE_CAN_QAM_32 | - FE_CAN_QAM_64 | FE_CAN_QAM_AUTO | - FE_CAN_TRANSMISSION_MODE_AUTO | - FE_CAN_BANDWIDTH_AUTO | - FE_CAN_GUARD_INTERVAL_AUTO | - FE_CAN_HIERARCHY_AUTO | - FE_CAN_RECOVER - }, - - .release = lgs8gl5_release, - - .init = lgs8gl5_init, - - .set_frontend = lgs8gl5_set_frontend, - .get_frontend = lgs8gl5_get_frontend, - .get_tune_settings = lgs8gl5_get_tune_settings, - - .read_status = lgs8gl5_read_status, - .read_ber = lgs8gl5_read_ber, - .read_signal_strength = lgs8gl5_read_signal_strength, - .read_snr = lgs8gl5_read_snr, - .read_ucblocks = lgs8gl5_read_ucblocks, -}; - - -module_param(debug, int, 0644); -MODULE_PARM_DESC(debug, "Turn on/off frontend debugging (default:off)."); - -MODULE_DESCRIPTION("Legend Silicon LGS-8GL5 DMB-TH Demodulator driver"); -MODULE_AUTHOR("Timothy Lee"); -MODULE_LICENSE("GPL"); |