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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 18:49:45 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 18:49:45 +0000 |
commit | 2c3c1048746a4622d8c89a29670120dc8fab93c4 (patch) | |
tree | 848558de17fb3008cdf4d861b01ac7781903ce39 /drivers/media/dvb-frontends/or51211.c | |
parent | Initial commit. (diff) | |
download | linux-2c3c1048746a4622d8c89a29670120dc8fab93c4.tar.xz linux-2c3c1048746a4622d8c89a29670120dc8fab93c4.zip |
Adding upstream version 6.1.76.upstream/6.1.76upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'drivers/media/dvb-frontends/or51211.c')
-rw-r--r-- | drivers/media/dvb-frontends/or51211.c | 555 |
1 files changed, 555 insertions, 0 deletions
diff --git a/drivers/media/dvb-frontends/or51211.c b/drivers/media/dvb-frontends/or51211.c new file mode 100644 index 000000000..dc6048216 --- /dev/null +++ b/drivers/media/dvb-frontends/or51211.c @@ -0,0 +1,555 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * Support for OR51211 (pcHDTV HD-2000) - VSB + * + * Copyright (C) 2005 Kirk Lapray <kirk_lapray@bigfoot.com> + * + * Based on code from Jack Kelliher (kelliher@xmission.com) + * Copyright (C) 2002 & pcHDTV, inc. +*/ + +#define pr_fmt(fmt) KBUILD_MODNAME ": %s: " fmt, __func__ + +/* + * This driver needs external firmware. Please use the command + * "<kerneldir>/scripts/get_dvb_firmware or51211" to + * download/extract it, and then copy it to /usr/lib/hotplug/firmware + * or /lib/firmware (depending on configuration of firmware hotplug). + */ +#define OR51211_DEFAULT_FIRMWARE "dvb-fe-or51211.fw" + +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/device.h> +#include <linux/firmware.h> +#include <linux/string.h> +#include <linux/slab.h> +#include <asm/byteorder.h> + +#include <media/dvb_math.h> +#include <media/dvb_frontend.h> +#include "or51211.h" + +static int debug; +#define dprintk(args...) \ + do { if (debug) pr_debug(args); } while (0) + +static u8 run_buf[] = {0x7f,0x01}; +static u8 cmd_buf[] = {0x04,0x01,0x50,0x80,0x06}; // ATSC + +struct or51211_state { + + struct i2c_adapter* i2c; + + /* Configuration settings */ + const struct or51211_config* config; + + struct dvb_frontend frontend; + struct bt878* bt; + + /* Demodulator private data */ + u8 initialized:1; + u32 snr; /* Result of last SNR calculation */ + + /* Tuner private data */ + u32 current_frequency; +}; + +static int i2c_writebytes (struct or51211_state* state, u8 reg, const u8 *buf, + int len) +{ + int err; + struct i2c_msg msg; + msg.addr = reg; + msg.flags = 0; + msg.len = len; + msg.buf = (u8 *)buf; + + if ((err = i2c_transfer (state->i2c, &msg, 1)) != 1) { + pr_warn("error (addr %02x, err == %i)\n", reg, err); + return -EREMOTEIO; + } + + return 0; +} + +static int i2c_readbytes(struct or51211_state *state, u8 reg, u8 *buf, int len) +{ + int err; + struct i2c_msg msg; + msg.addr = reg; + msg.flags = I2C_M_RD; + msg.len = len; + msg.buf = buf; + + if ((err = i2c_transfer (state->i2c, &msg, 1)) != 1) { + pr_warn("error (addr %02x, err == %i)\n", reg, err); + return -EREMOTEIO; + } + + return 0; +} + +static int or51211_load_firmware (struct dvb_frontend* fe, + const struct firmware *fw) +{ + struct or51211_state* state = fe->demodulator_priv; + u8 tudata[585]; + int i; + + dprintk("Firmware is %zu bytes\n", fw->size); + + /* Get eprom data */ + tudata[0] = 17; + if (i2c_writebytes(state,0x50,tudata,1)) { + pr_warn("error eprom addr\n"); + return -1; + } + if (i2c_readbytes(state,0x50,&tudata[145],192)) { + pr_warn("error eprom\n"); + return -1; + } + + /* Create firmware buffer */ + for (i = 0; i < 145; i++) + tudata[i] = fw->data[i]; + + for (i = 0; i < 248; i++) + tudata[i+337] = fw->data[145+i]; + + state->config->reset(fe); + + if (i2c_writebytes(state,state->config->demod_address,tudata,585)) { + pr_warn("error 1\n"); + return -1; + } + msleep(1); + + if (i2c_writebytes(state,state->config->demod_address, + &fw->data[393],8125)) { + pr_warn("error 2\n"); + return -1; + } + msleep(1); + + if (i2c_writebytes(state,state->config->demod_address,run_buf,2)) { + pr_warn("error 3\n"); + return -1; + } + + /* Wait at least 5 msec */ + msleep(10); + if (i2c_writebytes(state,state->config->demod_address,run_buf,2)) { + pr_warn("error 4\n"); + return -1; + } + msleep(10); + + pr_info("Done.\n"); + return 0; +}; + +static int or51211_setmode(struct dvb_frontend* fe, int mode) +{ + struct or51211_state* state = fe->demodulator_priv; + u8 rec_buf[14]; + + state->config->setmode(fe, mode); + + if (i2c_writebytes(state,state->config->demod_address,run_buf,2)) { + pr_warn("error 1\n"); + return -1; + } + + /* Wait at least 5 msec */ + msleep(10); + if (i2c_writebytes(state,state->config->demod_address,run_buf,2)) { + pr_warn("error 2\n"); + return -1; + } + + msleep(10); + + /* Set operation mode in Receiver 1 register; + * type 1: + * data 0x50h Automatic sets receiver channel conditions + * Automatic NTSC rejection filter + * Enable MPEG serial data output + * MPEG2tr + * High tuner phase noise + * normal +/-150kHz Carrier acquisition range + */ + if (i2c_writebytes(state,state->config->demod_address,cmd_buf,3)) { + pr_warn("error 3\n"); + return -1; + } + + rec_buf[0] = 0x04; + rec_buf[1] = 0x00; + rec_buf[2] = 0x03; + rec_buf[3] = 0x00; + msleep(20); + if (i2c_writebytes(state,state->config->demod_address,rec_buf,3)) { + pr_warn("error 5\n"); + } + msleep(3); + if (i2c_readbytes(state,state->config->demod_address,&rec_buf[10],2)) { + pr_warn("error 6\n"); + return -1; + } + dprintk("rec status %02x %02x\n", rec_buf[10], rec_buf[11]); + + return 0; +} + +static int or51211_set_parameters(struct dvb_frontend *fe) +{ + struct dtv_frontend_properties *p = &fe->dtv_property_cache; + struct or51211_state* state = fe->demodulator_priv; + + /* Change only if we are actually changing the channel */ + if (state->current_frequency != p->frequency) { + 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); + } + + /* Set to ATSC mode */ + or51211_setmode(fe,0); + + /* Update current frequency */ + state->current_frequency = p->frequency; + } + return 0; +} + +static int or51211_read_status(struct dvb_frontend *fe, enum fe_status *status) +{ + struct or51211_state* state = fe->demodulator_priv; + unsigned char rec_buf[2]; + unsigned char snd_buf[] = {0x04,0x00,0x03,0x00}; + *status = 0; + + /* Receiver Status */ + if (i2c_writebytes(state,state->config->demod_address,snd_buf,3)) { + pr_warn("write error\n"); + return -1; + } + msleep(3); + if (i2c_readbytes(state,state->config->demod_address,rec_buf,2)) { + pr_warn("read error\n"); + return -1; + } + dprintk("%x %x\n", rec_buf[0], rec_buf[1]); + + if (rec_buf[0] & 0x01) { /* Receiver Lock */ + *status |= FE_HAS_SIGNAL; + *status |= FE_HAS_CARRIER; + *status |= FE_HAS_VITERBI; + *status |= FE_HAS_SYNC; + *status |= FE_HAS_LOCK; + } + return 0; +} + +/* Calculate SNR estimation (scaled by 2^24) + + 8-VSB SNR equation from Oren datasheets + + For 8-VSB: + SNR[dB] = 10 * log10(219037.9454 / MSE^2 ) + + We re-write the snr equation as: + SNR * 2^24 = 10*(c - 2*intlog10(MSE)) + Where for 8-VSB, c = log10(219037.9454) * 2^24 */ + +static u32 calculate_snr(u32 mse, u32 c) +{ + if (mse == 0) /* No signal */ + return 0; + + mse = 2*intlog10(mse); + if (mse > c) { + /* Negative SNR, which is possible, but realisticly the + demod will lose lock before the signal gets this bad. The + API only allows for unsigned values, so just return 0 */ + return 0; + } + return 10*(c - mse); +} + +static int or51211_read_snr(struct dvb_frontend* fe, u16* snr) +{ + struct or51211_state* state = fe->demodulator_priv; + u8 rec_buf[2]; + u8 snd_buf[3]; + + /* SNR after Equalizer */ + snd_buf[0] = 0x04; + snd_buf[1] = 0x00; + snd_buf[2] = 0x04; + + if (i2c_writebytes(state,state->config->demod_address,snd_buf,3)) { + pr_warn("error writing snr reg\n"); + return -1; + } + if (i2c_readbytes(state,state->config->demod_address,rec_buf,2)) { + pr_warn("read_status read error\n"); + return -1; + } + + state->snr = calculate_snr(rec_buf[0], 89599047); + *snr = (state->snr) >> 16; + + dprintk("noise = 0x%02x, snr = %d.%02d dB\n", rec_buf[0], + state->snr >> 24, (((state->snr>>8) & 0xffff) * 100) >> 16); + + return 0; +} + +static int or51211_read_signal_strength(struct dvb_frontend* fe, u16* strength) +{ + /* Calculate Strength from SNR up to 35dB */ + /* Even though the SNR can go higher than 35dB, there is some comfort */ + /* factor in having a range of strong signals that can show at 100% */ + struct or51211_state* state = (struct or51211_state*)fe->demodulator_priv; + u16 snr; + int ret; + + ret = fe->ops.read_snr(fe, &snr); + if (ret != 0) + return ret; + /* Rather than use the 8.8 value snr, use state->snr which is 8.24 */ + /* scale the range 0 - 35*2^24 into 0 - 65535 */ + if (state->snr >= 8960 * 0x10000) + *strength = 0xffff; + else + *strength = state->snr / 8960; + + return 0; +} + +static int or51211_read_ber(struct dvb_frontend* fe, u32* ber) +{ + *ber = -ENOSYS; + return 0; +} + +static int or51211_read_ucblocks(struct dvb_frontend* fe, u32* ucblocks) +{ + *ucblocks = -ENOSYS; + return 0; +} + +static int or51211_sleep(struct dvb_frontend* fe) +{ + return 0; +} + +static int or51211_init(struct dvb_frontend* fe) +{ + struct or51211_state* state = fe->demodulator_priv; + const struct or51211_config* config = state->config; + const struct firmware* fw; + unsigned char get_ver_buf[] = {0x04,0x00,0x30,0x00,0x00}; + unsigned char rec_buf[14]; + int ret,i; + + if (!state->initialized) { + /* Request the firmware, this will block until it uploads */ + pr_info("Waiting for firmware upload (%s)...\n", + OR51211_DEFAULT_FIRMWARE); + ret = config->request_firmware(fe, &fw, + OR51211_DEFAULT_FIRMWARE); + pr_info("Got Hotplug firmware\n"); + if (ret) { + pr_warn("No firmware uploaded (timeout or file not found?)\n"); + return ret; + } + + ret = or51211_load_firmware(fe, fw); + release_firmware(fw); + if (ret) { + pr_warn("Writing firmware to device failed!\n"); + return ret; + } + pr_info("Firmware upload complete.\n"); + + /* Set operation mode in Receiver 1 register; + * type 1: + * data 0x50h Automatic sets receiver channel conditions + * Automatic NTSC rejection filter + * Enable MPEG serial data output + * MPEG2tr + * High tuner phase noise + * normal +/-150kHz Carrier acquisition range + */ + if (i2c_writebytes(state,state->config->demod_address, + cmd_buf,3)) { + pr_warn("Load DVR Error 5\n"); + return -1; + } + + /* Read back ucode version to besure we loaded correctly */ + /* and are really up and running */ + rec_buf[0] = 0x04; + rec_buf[1] = 0x00; + rec_buf[2] = 0x03; + rec_buf[3] = 0x00; + msleep(30); + if (i2c_writebytes(state,state->config->demod_address, + rec_buf,3)) { + pr_warn("Load DVR Error A\n"); + return -1; + } + msleep(3); + if (i2c_readbytes(state,state->config->demod_address, + &rec_buf[10],2)) { + pr_warn("Load DVR Error B\n"); + return -1; + } + + rec_buf[0] = 0x04; + rec_buf[1] = 0x00; + rec_buf[2] = 0x01; + rec_buf[3] = 0x00; + msleep(20); + if (i2c_writebytes(state,state->config->demod_address, + rec_buf,3)) { + pr_warn("Load DVR Error C\n"); + return -1; + } + msleep(3); + if (i2c_readbytes(state,state->config->demod_address, + &rec_buf[12],2)) { + pr_warn("Load DVR Error D\n"); + return -1; + } + + for (i = 0; i < 8; i++) + rec_buf[i]=0xed; + + for (i = 0; i < 5; i++) { + msleep(30); + get_ver_buf[4] = i+1; + if (i2c_writebytes(state,state->config->demod_address, + get_ver_buf,5)) { + pr_warn("Load DVR Error 6 - %d\n", i); + return -1; + } + msleep(3); + + if (i2c_readbytes(state,state->config->demod_address, + &rec_buf[i*2],2)) { + pr_warn("Load DVR Error 7 - %d\n", i); + return -1; + } + /* If we didn't receive the right index, try again */ + if ((int)rec_buf[i*2+1]!=i+1){ + i--; + } + } + dprintk("read_fwbits %10ph\n", rec_buf); + + pr_info("ver TU%02x%02x%02x VSB mode %02x Status %02x\n", + rec_buf[2], rec_buf[4], rec_buf[6], rec_buf[12], + rec_buf[10]); + + rec_buf[0] = 0x04; + rec_buf[1] = 0x00; + rec_buf[2] = 0x03; + rec_buf[3] = 0x00; + msleep(20); + if (i2c_writebytes(state,state->config->demod_address, + rec_buf,3)) { + pr_warn("Load DVR Error 8\n"); + return -1; + } + msleep(20); + if (i2c_readbytes(state,state->config->demod_address, + &rec_buf[8],2)) { + pr_warn("Load DVR Error 9\n"); + return -1; + } + state->initialized = 1; + } + + return 0; +} + +static int or51211_get_tune_settings(struct dvb_frontend* fe, + struct dvb_frontend_tune_settings* fesettings) +{ + fesettings->min_delay_ms = 500; + fesettings->step_size = 0; + fesettings->max_drift = 0; + return 0; +} + +static void or51211_release(struct dvb_frontend* fe) +{ + struct or51211_state* state = fe->demodulator_priv; + state->config->sleep(fe); + kfree(state); +} + +static const struct dvb_frontend_ops or51211_ops; + +struct dvb_frontend* or51211_attach(const struct or51211_config* config, + struct i2c_adapter* i2c) +{ + struct or51211_state* state = NULL; + + /* Allocate memory for the internal state */ + state = kzalloc(sizeof(struct or51211_state), GFP_KERNEL); + if (state == NULL) + return NULL; + + /* Setup the state */ + state->config = config; + state->i2c = i2c; + state->initialized = 0; + state->current_frequency = 0; + + /* Create dvb_frontend */ + memcpy(&state->frontend.ops, &or51211_ops, sizeof(struct dvb_frontend_ops)); + state->frontend.demodulator_priv = state; + return &state->frontend; +} + +static const struct dvb_frontend_ops or51211_ops = { + .delsys = { SYS_ATSC, SYS_DVBC_ANNEX_B }, + .info = { + .name = "Oren OR51211 VSB Frontend", + .frequency_min_hz = 44 * MHz, + .frequency_max_hz = 958 * MHz, + .frequency_stepsize_hz = 166666, + .caps = FE_CAN_FEC_1_2 | FE_CAN_FEC_2_3 | FE_CAN_FEC_3_4 | + FE_CAN_FEC_5_6 | FE_CAN_FEC_7_8 | FE_CAN_FEC_AUTO | + FE_CAN_8VSB + }, + + .release = or51211_release, + + .init = or51211_init, + .sleep = or51211_sleep, + + .set_frontend = or51211_set_parameters, + .get_tune_settings = or51211_get_tune_settings, + + .read_status = or51211_read_status, + .read_ber = or51211_read_ber, + .read_signal_strength = or51211_read_signal_strength, + .read_snr = or51211_read_snr, + .read_ucblocks = or51211_read_ucblocks, +}; + +module_param(debug, int, 0644); +MODULE_PARM_DESC(debug, "Turn on/off frontend debugging (default:off)."); + +MODULE_DESCRIPTION("Oren OR51211 VSB [pcHDTV HD-2000] Demodulator Driver"); +MODULE_AUTHOR("Kirk Lapray"); +MODULE_LICENSE("GPL"); + +EXPORT_SYMBOL_GPL(or51211_attach); + |