| /* |
| * 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. |
| * |
| * 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. |
| * |
| */ |
| |
| /* |
| * This driver needs external firmware. Please use the command |
| * "<kerneldir>/Documentation/dvb/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/moduleparam.h> |
| #include <linux/device.h> |
| #include <linux/firmware.h> |
| #include <linux/string.h> |
| #include <linux/slab.h> |
| #include <asm/byteorder.h> |
| |
| #include "dvb_math.h" |
| #include "dvb_frontend.h" |
| #include "or51211.h" |
| |
| static int debug; |
| #define dprintk(args...) \ |
| do { \ |
| if (debug) printk(KERN_DEBUG "or51211: " 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 claculation */ |
| |
| /* Tuner private data */ |
| u32 current_frequency; |
| }; |
| |
| static int i2c_writebytes (struct or51211_state* state, u8 reg, u8 *buf, |
| int len) |
| { |
| int err; |
| struct i2c_msg msg; |
| msg.addr = reg; |
| msg.flags = 0; |
| msg.len = len; |
| msg.buf = buf; |
| |
| if ((err = i2c_transfer (state->i2c, &msg, 1)) != 1) { |
| printk(KERN_WARNING "or51211: i2c_writebytes error " |
| "(addr %02x, err == %i)\n", reg, err); |
| return -EREMOTEIO; |
| } |
| |
| return 0; |
| } |
| |
| static u8 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) { |
| printk(KERN_WARNING "or51211: i2c_readbytes 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 %zd bytes\n",fw->size); |
| |
| /* Get eprom data */ |
| tudata[0] = 17; |
| if (i2c_writebytes(state,0x50,tudata,1)) { |
| printk(KERN_WARNING "or51211:load_firmware error eprom addr\n"); |
| return -1; |
| } |
| if (i2c_readbytes(state,0x50,&tudata[145],192)) { |
| printk(KERN_WARNING "or51211: load_firmware 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)) { |
| printk(KERN_WARNING "or51211: load_firmware error 1\n"); |
| return -1; |
| } |
| msleep(1); |
| |
| if (i2c_writebytes(state,state->config->demod_address, |
| &fw->data[393],8125)) { |
| printk(KERN_WARNING "or51211: load_firmware error 2\n"); |
| return -1; |
| } |
| msleep(1); |
| |
| if (i2c_writebytes(state,state->config->demod_address,run_buf,2)) { |
| printk(KERN_WARNING "or51211: load_firmware error 3\n"); |
| return -1; |
| } |
| |
| /* Wait at least 5 msec */ |
| msleep(10); |
| if (i2c_writebytes(state,state->config->demod_address,run_buf,2)) { |
| printk(KERN_WARNING "or51211: load_firmware error 4\n"); |
| return -1; |
| } |
| msleep(10); |
| |
| printk("or51211: 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)) { |
| printk(KERN_WARNING "or51211: setmode error 1\n"); |
| return -1; |
| } |
| |
| /* Wait at least 5 msec */ |
| msleep(10); |
| if (i2c_writebytes(state,state->config->demod_address,run_buf,2)) { |
| printk(KERN_WARNING "or51211: setmode 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)) { |
| printk(KERN_WARNING "or51211: setmode 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)) { |
| printk(KERN_WARNING "or51211: setmode error 5\n"); |
| } |
| msleep(3); |
| if (i2c_readbytes(state,state->config->demod_address,&rec_buf[10],2)) { |
| printk(KERN_WARNING "or51211: setmode error 6"); |
| return -1; |
| } |
| dprintk("setmode rec status %02x %02x\n",rec_buf[10],rec_buf[11]); |
| |
| return 0; |
| } |
| |
| static int or51211_set_parameters(struct dvb_frontend* fe, |
| struct dvb_frontend_parameters *param) |
| { |
| struct or51211_state* state = fe->demodulator_priv; |
| |
| /* Change only if we are actually changing the channel */ |
| if (state->current_frequency != param->frequency) { |
| if (fe->ops.tuner_ops.set_params) { |
| fe->ops.tuner_ops.set_params(fe, param); |
| 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 = param->frequency; |
| } |
| return 0; |
| } |
| |
| static int or51211_read_status(struct dvb_frontend* fe, fe_status_t* 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)) { |
| printk(KERN_WARNING "or51132: read_status write error\n"); |
| return -1; |
| } |
| msleep(3); |
| if (i2c_readbytes(state,state->config->demod_address,rec_buf,2)) { |
| printk(KERN_WARNING "or51132: read_status read error\n"); |
| return -1; |
| } |
| dprintk("read_status %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)) { |
| printk(KERN_WARNING "%s: error writing snr reg\n", |
| __FUNCTION__); |
| return -1; |
| } |
| if (i2c_readbytes(state,state->config->demod_address,rec_buf,2)) { |
| printk(KERN_WARNING "%s: read_status read error\n", |
| __FUNCTION__); |
| return -1; |
| } |
| |
| state->snr = calculate_snr(rec_buf[0], 89599047); |
| *snr = (state->snr) >> 16; |
| |
| dprintk("%s: noise = 0x%02x, snr = %d.%02d dB\n", __FUNCTION__, 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 */ |
| printk(KERN_INFO "or51211: Waiting for firmware upload " |
| "(%s)...\n", OR51211_DEFAULT_FIRMWARE); |
| ret = config->request_firmware(fe, &fw, |
| OR51211_DEFAULT_FIRMWARE); |
| printk(KERN_INFO "or51211:Got Hotplug firmware\n"); |
| if (ret) { |
| printk(KERN_WARNING "or51211: No firmware uploaded " |
| "(timeout or file not found?)\n"); |
| return ret; |
| } |
| |
| ret = or51211_load_firmware(fe, fw); |
| release_firmware(fw); |
| if (ret) { |
| printk(KERN_WARNING "or51211: Writing firmware to " |
| "device failed!\n"); |
| return ret; |
| } |
| printk(KERN_INFO "or51211: 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)) { |
| printk(KERN_WARNING "or51211: 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)) { |
| printk(KERN_WARNING "or51211: Load DVR Error A\n"); |
| return -1; |
| } |
| msleep(3); |
| if (i2c_readbytes(state,state->config->demod_address, |
| &rec_buf[10],2)) { |
| printk(KERN_WARNING "or51211: 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)) { |
| printk(KERN_WARNING "or51211: Load DVR Error C\n"); |
| return -1; |
| } |
| msleep(3); |
| if (i2c_readbytes(state,state->config->demod_address, |
| &rec_buf[12],2)) { |
| printk(KERN_WARNING "or51211: 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)) { |
| printk(KERN_WARNING "or51211:Load DVR Error 6" |
| " - %d\n",i); |
| return -1; |
| } |
| msleep(3); |
| |
| if (i2c_readbytes(state,state->config->demod_address, |
| &rec_buf[i*2],2)) { |
| printk(KERN_WARNING "or51211: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 %x %x %x %x %x %x %x %x %x %x\n", |
| rec_buf[0], rec_buf[1], rec_buf[2], rec_buf[3], |
| rec_buf[4], rec_buf[5], rec_buf[6], rec_buf[7], |
| rec_buf[8], rec_buf[9]); |
| |
| printk(KERN_INFO "or51211: 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)) { |
| printk(KERN_WARNING "or51211: Load DVR Error 8\n"); |
| return -1; |
| } |
| msleep(20); |
| if (i2c_readbytes(state,state->config->demod_address, |
| &rec_buf[8],2)) { |
| printk(KERN_WARNING "or51211: 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 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 = kmalloc(sizeof(struct or51211_state), GFP_KERNEL); |
| if (state == NULL) |
| goto error; |
| |
| /* 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; |
| |
| error: |
| kfree(state); |
| return NULL; |
| } |
| |
| static struct dvb_frontend_ops or51211_ops = { |
| |
| .info = { |
| .name = "Oren OR51211 VSB Frontend", |
| .type = FE_ATSC, |
| .frequency_min = 44000000, |
| .frequency_max = 958000000, |
| .frequency_stepsize = 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(or51211_attach); |
| |