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608 lines
16 KiB
608 lines
16 KiB
// SPDX-License-Identifier: GPL-2.0-or-later |
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/* |
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* Support for OR51132 (pcHDTV HD-3000) - VSB/QAM |
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* |
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* Copyright (C) 2007 Trent Piepho <[email protected]> |
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* |
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* Copyright (C) 2005 Kirk Lapray <[email protected]> |
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* |
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* Based on code from Jack Kelliher ([email protected]) |
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* Copyright (C) 2002 & pcHDTV, inc. |
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*/ |
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|
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/* |
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* This driver needs two external firmware files. Please copy |
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* "dvb-fe-or51132-vsb.fw" and "dvb-fe-or51132-qam.fw" to |
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* /usr/lib/hotplug/firmware/ or /lib/firmware/ |
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* (depending on configuration of firmware hotplug). |
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*/ |
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#define OR51132_VSB_FIRMWARE "dvb-fe-or51132-vsb.fw" |
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#define OR51132_QAM_FIRMWARE "dvb-fe-or51132-qam.fw" |
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|
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#include <linux/kernel.h> |
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#include <linux/module.h> |
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#include <linux/init.h> |
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#include <linux/delay.h> |
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#include <linux/string.h> |
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#include <linux/slab.h> |
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#include <asm/byteorder.h> |
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#include <media/dvb_math.h> |
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#include <media/dvb_frontend.h> |
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#include "or51132.h" |
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|
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static int debug; |
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#define dprintk(args...) \ |
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do { \ |
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if (debug) printk(KERN_DEBUG "or51132: " args); \ |
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} while (0) |
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struct or51132_state |
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{ |
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struct i2c_adapter* i2c; |
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|
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/* Configuration settings */ |
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const struct or51132_config* config; |
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struct dvb_frontend frontend; |
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|
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/* Demodulator private data */ |
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enum fe_modulation current_modulation; |
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u32 snr; /* Result of last SNR calculation */ |
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|
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/* Tuner private data */ |
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u32 current_frequency; |
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}; |
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/* Write buffer to demod */ |
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static int or51132_writebuf(struct or51132_state *state, const u8 *buf, int len) |
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{ |
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int err; |
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struct i2c_msg msg = { .addr = state->config->demod_address, |
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.flags = 0, .buf = (u8*)buf, .len = len }; |
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|
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/* msleep(20); */ /* doesn't appear to be necessary */ |
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if ((err = i2c_transfer(state->i2c, &msg, 1)) != 1) { |
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printk(KERN_WARNING "or51132: I2C write (addr 0x%02x len %d) error: %d\n", |
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msg.addr, msg.len, err); |
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return -EREMOTEIO; |
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} |
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return 0; |
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} |
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|
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/* Write constant bytes, e.g. or51132_writebytes(state, 0x04, 0x42, 0x00); |
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Less code and more efficient that loading a buffer on the stack with |
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the bytes to send and then calling or51132_writebuf() on that. */ |
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#define or51132_writebytes(state, data...) \ |
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({ static const u8 _data[] = {data}; \ |
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or51132_writebuf(state, _data, sizeof(_data)); }) |
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|
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/* Read data from demod into buffer. Returns 0 on success. */ |
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static int or51132_readbuf(struct or51132_state *state, u8 *buf, int len) |
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{ |
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int err; |
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struct i2c_msg msg = { .addr = state->config->demod_address, |
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.flags = I2C_M_RD, .buf = buf, .len = len }; |
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|
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/* msleep(20); */ /* doesn't appear to be necessary */ |
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if ((err = i2c_transfer(state->i2c, &msg, 1)) != 1) { |
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printk(KERN_WARNING "or51132: I2C read (addr 0x%02x len %d) error: %d\n", |
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msg.addr, msg.len, err); |
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return -EREMOTEIO; |
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} |
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return 0; |
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} |
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|
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/* Reads a 16-bit demod register. Returns <0 on error. */ |
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static int or51132_readreg(struct or51132_state *state, u8 reg) |
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{ |
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u8 buf[2] = { 0x04, reg }; |
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struct i2c_msg msg[2] = { |
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{.addr = state->config->demod_address, .flags = 0, |
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.buf = buf, .len = 2 }, |
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{.addr = state->config->demod_address, .flags = I2C_M_RD, |
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.buf = buf, .len = 2 }}; |
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int err; |
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if ((err = i2c_transfer(state->i2c, msg, 2)) != 2) { |
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printk(KERN_WARNING "or51132: I2C error reading register %d: %d\n", |
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reg, err); |
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return -EREMOTEIO; |
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} |
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return buf[0] | (buf[1] << 8); |
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} |
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static int or51132_load_firmware (struct dvb_frontend* fe, const struct firmware *fw) |
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{ |
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struct or51132_state* state = fe->demodulator_priv; |
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static const u8 run_buf[] = {0x7F,0x01}; |
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u8 rec_buf[8]; |
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u32 firmwareAsize, firmwareBsize; |
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int i,ret; |
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dprintk("Firmware is %zd bytes\n",fw->size); |
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|
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/* Get size of firmware A and B */ |
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firmwareAsize = le32_to_cpu(*((__le32*)fw->data)); |
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dprintk("FirmwareA is %i bytes\n",firmwareAsize); |
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firmwareBsize = le32_to_cpu(*((__le32*)(fw->data+4))); |
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dprintk("FirmwareB is %i bytes\n",firmwareBsize); |
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/* Upload firmware */ |
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if ((ret = or51132_writebuf(state, &fw->data[8], firmwareAsize))) { |
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printk(KERN_WARNING "or51132: load_firmware error 1\n"); |
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return ret; |
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} |
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if ((ret = or51132_writebuf(state, &fw->data[8+firmwareAsize], |
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firmwareBsize))) { |
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printk(KERN_WARNING "or51132: load_firmware error 2\n"); |
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return ret; |
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} |
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if ((ret = or51132_writebuf(state, run_buf, 2))) { |
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printk(KERN_WARNING "or51132: load_firmware error 3\n"); |
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return ret; |
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} |
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if ((ret = or51132_writebuf(state, run_buf, 2))) { |
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printk(KERN_WARNING "or51132: load_firmware error 4\n"); |
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return ret; |
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} |
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/* 50ms for operation to begin */ |
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msleep(50); |
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/* Read back ucode version to besure we loaded correctly and are really up and running */ |
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/* Get uCode version */ |
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if ((ret = or51132_writebytes(state, 0x10, 0x10, 0x00))) { |
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printk(KERN_WARNING "or51132: load_firmware error a\n"); |
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return ret; |
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} |
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if ((ret = or51132_writebytes(state, 0x04, 0x17))) { |
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printk(KERN_WARNING "or51132: load_firmware error b\n"); |
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return ret; |
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} |
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if ((ret = or51132_writebytes(state, 0x00, 0x00))) { |
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printk(KERN_WARNING "or51132: load_firmware error c\n"); |
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return ret; |
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} |
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for (i=0;i<4;i++) { |
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/* Once upon a time, this command might have had something |
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to do with getting the firmware version, but it's |
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not used anymore: |
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{0x04,0x00,0x30,0x00,i+1} */ |
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/* Read 8 bytes, two bytes at a time */ |
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if ((ret = or51132_readbuf(state, &rec_buf[i*2], 2))) { |
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printk(KERN_WARNING |
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"or51132: load_firmware error d - %d\n",i); |
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return ret; |
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} |
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} |
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printk(KERN_WARNING |
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"or51132: Version: %02X%02X%02X%02X-%02X%02X%02X%02X (%02X%01X-%01X-%02X%01X-%01X)\n", |
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rec_buf[1],rec_buf[0],rec_buf[3],rec_buf[2], |
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rec_buf[5],rec_buf[4],rec_buf[7],rec_buf[6], |
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rec_buf[3],rec_buf[2]>>4,rec_buf[2]&0x0f, |
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rec_buf[5],rec_buf[4]>>4,rec_buf[4]&0x0f); |
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if ((ret = or51132_writebytes(state, 0x10, 0x00, 0x00))) { |
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printk(KERN_WARNING "or51132: load_firmware error e\n"); |
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return ret; |
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} |
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return 0; |
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}; |
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static int or51132_init(struct dvb_frontend* fe) |
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{ |
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return 0; |
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} |
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static int or51132_read_ber(struct dvb_frontend* fe, u32* ber) |
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{ |
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*ber = 0; |
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return 0; |
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} |
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static int or51132_read_ucblocks(struct dvb_frontend* fe, u32* ucblocks) |
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{ |
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*ucblocks = 0; |
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return 0; |
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} |
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static int or51132_sleep(struct dvb_frontend* fe) |
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{ |
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return 0; |
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} |
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static int or51132_setmode(struct dvb_frontend* fe) |
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{ |
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struct or51132_state* state = fe->demodulator_priv; |
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u8 cmd_buf1[3] = {0x04, 0x01, 0x5f}; |
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u8 cmd_buf2[3] = {0x1c, 0x00, 0 }; |
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dprintk("setmode %d\n",(int)state->current_modulation); |
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switch (state->current_modulation) { |
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case VSB_8: |
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/* Auto CH, Auto NTSC rej, MPEGser, MPEG2tr, phase noise-high */ |
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cmd_buf1[2] = 0x50; |
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/* REC MODE inv IF spectrum, Normal */ |
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cmd_buf2[1] = 0x03; |
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/* Channel MODE ATSC/VSB8 */ |
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cmd_buf2[2] = 0x06; |
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break; |
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/* All QAM modes are: |
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Auto-deinterleave; MPEGser, MPEG2tr, phase noise-high |
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REC MODE Normal Carrier Lock */ |
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case QAM_AUTO: |
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/* Channel MODE Auto QAM64/256 */ |
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cmd_buf2[2] = 0x4f; |
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break; |
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case QAM_256: |
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/* Channel MODE QAM256 */ |
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cmd_buf2[2] = 0x45; |
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break; |
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case QAM_64: |
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/* Channel MODE QAM64 */ |
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cmd_buf2[2] = 0x43; |
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break; |
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default: |
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printk(KERN_WARNING |
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"or51132: setmode: Modulation set to unsupported value (%d)\n", |
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state->current_modulation); |
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return -EINVAL; |
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} |
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/* Set Receiver 1 register */ |
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if (or51132_writebuf(state, cmd_buf1, 3)) { |
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printk(KERN_WARNING "or51132: set_mode error 1\n"); |
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return -EREMOTEIO; |
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} |
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dprintk("set #1 to %02x\n", cmd_buf1[2]); |
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/* Set operation mode in Receiver 6 register */ |
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if (or51132_writebuf(state, cmd_buf2, 3)) { |
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printk(KERN_WARNING "or51132: set_mode error 2\n"); |
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return -EREMOTEIO; |
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} |
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dprintk("set #6 to 0x%02x%02x\n", cmd_buf2[1], cmd_buf2[2]); |
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return 0; |
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} |
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/* Some modulations use the same firmware. This classifies modulations |
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by the firmware they use. */ |
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#define MOD_FWCLASS_UNKNOWN 0 |
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#define MOD_FWCLASS_VSB 1 |
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#define MOD_FWCLASS_QAM 2 |
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static int modulation_fw_class(enum fe_modulation modulation) |
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{ |
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switch(modulation) { |
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case VSB_8: |
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return MOD_FWCLASS_VSB; |
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case QAM_AUTO: |
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case QAM_64: |
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case QAM_256: |
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return MOD_FWCLASS_QAM; |
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default: |
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return MOD_FWCLASS_UNKNOWN; |
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} |
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} |
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static int or51132_set_parameters(struct dvb_frontend *fe) |
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{ |
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struct dtv_frontend_properties *p = &fe->dtv_property_cache; |
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int ret; |
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struct or51132_state* state = fe->demodulator_priv; |
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const struct firmware *fw; |
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const char *fwname; |
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int clock_mode; |
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/* Upload new firmware only if we need a different one */ |
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if (modulation_fw_class(state->current_modulation) != |
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modulation_fw_class(p->modulation)) { |
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switch (modulation_fw_class(p->modulation)) { |
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case MOD_FWCLASS_VSB: |
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dprintk("set_parameters VSB MODE\n"); |
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fwname = OR51132_VSB_FIRMWARE; |
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/* Set non-punctured clock for VSB */ |
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clock_mode = 0; |
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break; |
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case MOD_FWCLASS_QAM: |
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dprintk("set_parameters QAM MODE\n"); |
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fwname = OR51132_QAM_FIRMWARE; |
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/* Set punctured clock for QAM */ |
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clock_mode = 1; |
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break; |
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default: |
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printk("or51132: Modulation type(%d) UNSUPPORTED\n", |
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p->modulation); |
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return -1; |
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} |
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printk("or51132: Waiting for firmware upload(%s)...\n", |
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fwname); |
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ret = request_firmware(&fw, fwname, state->i2c->dev.parent); |
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if (ret) { |
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printk(KERN_WARNING "or51132: No firmware uploaded(timeout or file not found?)\n"); |
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return ret; |
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} |
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ret = or51132_load_firmware(fe, fw); |
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release_firmware(fw); |
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if (ret) { |
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printk(KERN_WARNING "or51132: Writing firmware to device failed!\n"); |
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return ret; |
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} |
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printk("or51132: Firmware upload complete.\n"); |
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state->config->set_ts_params(fe, clock_mode); |
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} |
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/* Change only if we are actually changing the modulation */ |
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if (state->current_modulation != p->modulation) { |
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state->current_modulation = p->modulation; |
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or51132_setmode(fe); |
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} |
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if (fe->ops.tuner_ops.set_params) { |
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fe->ops.tuner_ops.set_params(fe); |
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if (fe->ops.i2c_gate_ctrl) fe->ops.i2c_gate_ctrl(fe, 0); |
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} |
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/* Set to current mode */ |
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or51132_setmode(fe); |
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|
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/* Update current frequency */ |
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state->current_frequency = p->frequency; |
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return 0; |
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} |
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static int or51132_get_parameters(struct dvb_frontend* fe, |
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struct dtv_frontend_properties *p) |
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{ |
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struct or51132_state* state = fe->demodulator_priv; |
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int status; |
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int retry = 1; |
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start: |
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/* Receiver Status */ |
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if ((status = or51132_readreg(state, 0x00)) < 0) { |
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printk(KERN_WARNING "or51132: get_parameters: error reading receiver status\n"); |
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return -EREMOTEIO; |
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} |
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switch(status&0xff) { |
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case 0x06: |
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p->modulation = VSB_8; |
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break; |
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case 0x43: |
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p->modulation = QAM_64; |
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break; |
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case 0x45: |
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p->modulation = QAM_256; |
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break; |
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default: |
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if (retry--) |
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goto start; |
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printk(KERN_WARNING "or51132: unknown status 0x%02x\n", |
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status&0xff); |
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return -EREMOTEIO; |
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} |
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/* FIXME: Read frequency from frontend, take AFC into account */ |
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p->frequency = state->current_frequency; |
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/* FIXME: How to read inversion setting? Receiver 6 register? */ |
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p->inversion = INVERSION_AUTO; |
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return 0; |
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} |
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static int or51132_read_status(struct dvb_frontend *fe, enum fe_status *status) |
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{ |
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struct or51132_state* state = fe->demodulator_priv; |
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int reg; |
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/* Receiver Status */ |
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if ((reg = or51132_readreg(state, 0x00)) < 0) { |
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printk(KERN_WARNING "or51132: read_status: error reading receiver status: %d\n", reg); |
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*status = 0; |
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return -EREMOTEIO; |
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} |
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dprintk("%s: read_status %04x\n", __func__, reg); |
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if (reg & 0x0100) /* Receiver Lock */ |
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*status = FE_HAS_SIGNAL|FE_HAS_CARRIER|FE_HAS_VITERBI| |
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FE_HAS_SYNC|FE_HAS_LOCK; |
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else |
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*status = 0; |
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return 0; |
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} |
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|
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/* Calculate SNR estimation (scaled by 2^24) |
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|
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8-VSB SNR and QAM equations from Oren datasheets |
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|
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For 8-VSB: |
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SNR[dB] = 10 * log10(897152044.8282 / MSE^2 ) - K |
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|
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Where K = 0 if NTSC rejection filter is OFF; and |
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K = 3 if NTSC rejection filter is ON |
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|
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For QAM64: |
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SNR[dB] = 10 * log10(897152044.8282 / MSE^2 ) |
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|
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For QAM256: |
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SNR[dB] = 10 * log10(907832426.314266 / MSE^2 ) |
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|
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We re-write the snr equation as: |
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SNR * 2^24 = 10*(c - 2*intlog10(MSE)) |
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Where for QAM256, c = log10(907832426.314266) * 2^24 |
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and for 8-VSB and QAM64, c = log10(897152044.8282) * 2^24 */ |
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static u32 calculate_snr(u32 mse, u32 c) |
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{ |
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if (mse == 0) /* No signal */ |
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return 0; |
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mse = 2*intlog10(mse); |
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if (mse > c) { |
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/* Negative SNR, which is possible, but realisticly the |
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demod will lose lock before the signal gets this bad. The |
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API only allows for unsigned values, so just return 0 */ |
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return 0; |
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} |
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return 10*(c - mse); |
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} |
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|
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static int or51132_read_snr(struct dvb_frontend* fe, u16* snr) |
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{ |
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struct or51132_state* state = fe->demodulator_priv; |
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int noise, reg; |
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u32 c, usK = 0; |
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int retry = 1; |
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start: |
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/* SNR after Equalizer */ |
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noise = or51132_readreg(state, 0x02); |
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if (noise < 0) { |
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printk(KERN_WARNING "or51132: read_snr: error reading equalizer\n"); |
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return -EREMOTEIO; |
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} |
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dprintk("read_snr noise (%d)\n", noise); |
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|
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/* Read status, contains modulation type for QAM_AUTO and |
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NTSC filter for VSB */ |
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reg = or51132_readreg(state, 0x00); |
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if (reg < 0) { |
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printk(KERN_WARNING "or51132: read_snr: error reading receiver status\n"); |
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return -EREMOTEIO; |
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} |
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|
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switch (reg&0xff) { |
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case 0x06: |
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if (reg & 0x1000) usK = 3 << 24; |
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fallthrough; |
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case 0x43: /* QAM64 */ |
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c = 150204167; |
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break; |
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case 0x45: |
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c = 150290396; |
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break; |
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default: |
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printk(KERN_WARNING "or51132: unknown status 0x%02x\n", reg&0xff); |
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if (retry--) goto start; |
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return -EREMOTEIO; |
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} |
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dprintk("%s: modulation %02x, NTSC rej O%s\n", __func__, |
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reg&0xff, reg&0x1000?"n":"ff"); |
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|
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/* Calculate SNR using noise, c, and NTSC rejection correction */ |
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state->snr = calculate_snr(noise, c) - usK; |
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*snr = (state->snr) >> 16; |
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|
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dprintk("%s: noise = 0x%08x, snr = %d.%02d dB\n", __func__, noise, |
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state->snr >> 24, (((state->snr>>8) & 0xffff) * 100) >> 16); |
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|
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return 0; |
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} |
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|
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static int or51132_read_signal_strength(struct dvb_frontend* fe, u16* strength) |
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{ |
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/* Calculate Strength from SNR up to 35dB */ |
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/* Even though the SNR can go higher than 35dB, there is some comfort */ |
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/* factor in having a range of strong signals that can show at 100% */ |
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struct or51132_state* state = (struct or51132_state*) fe->demodulator_priv; |
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u16 snr; |
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int ret; |
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|
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ret = fe->ops.read_snr(fe, &snr); |
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if (ret != 0) |
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return ret; |
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/* Rather than use the 8.8 value snr, use state->snr which is 8.24 */ |
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/* scale the range 0 - 35*2^24 into 0 - 65535 */ |
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if (state->snr >= 8960 * 0x10000) |
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*strength = 0xffff; |
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else |
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*strength = state->snr / 8960; |
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|
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return 0; |
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} |
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|
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static int or51132_get_tune_settings(struct dvb_frontend* fe, struct dvb_frontend_tune_settings* fe_tune_settings) |
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{ |
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fe_tune_settings->min_delay_ms = 500; |
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fe_tune_settings->step_size = 0; |
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fe_tune_settings->max_drift = 0; |
|
|
|
return 0; |
|
} |
|
|
|
static void or51132_release(struct dvb_frontend* fe) |
|
{ |
|
struct or51132_state* state = fe->demodulator_priv; |
|
kfree(state); |
|
} |
|
|
|
static const struct dvb_frontend_ops or51132_ops; |
|
|
|
struct dvb_frontend* or51132_attach(const struct or51132_config* config, |
|
struct i2c_adapter* i2c) |
|
{ |
|
struct or51132_state* state = NULL; |
|
|
|
/* Allocate memory for the internal state */ |
|
state = kzalloc(sizeof(struct or51132_state), GFP_KERNEL); |
|
if (state == NULL) |
|
return NULL; |
|
|
|
/* Setup the state */ |
|
state->config = config; |
|
state->i2c = i2c; |
|
state->current_frequency = -1; |
|
state->current_modulation = -1; |
|
|
|
/* Create dvb_frontend */ |
|
memcpy(&state->frontend.ops, &or51132_ops, sizeof(struct dvb_frontend_ops)); |
|
state->frontend.demodulator_priv = state; |
|
return &state->frontend; |
|
} |
|
|
|
static const struct dvb_frontend_ops or51132_ops = { |
|
.delsys = { SYS_ATSC, SYS_DVBC_ANNEX_B }, |
|
.info = { |
|
.name = "Oren OR51132 VSB/QAM 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_QAM_64 | FE_CAN_QAM_256 | FE_CAN_QAM_AUTO | |
|
FE_CAN_8VSB |
|
}, |
|
|
|
.release = or51132_release, |
|
|
|
.init = or51132_init, |
|
.sleep = or51132_sleep, |
|
|
|
.set_frontend = or51132_set_parameters, |
|
.get_frontend = or51132_get_parameters, |
|
.get_tune_settings = or51132_get_tune_settings, |
|
|
|
.read_status = or51132_read_status, |
|
.read_ber = or51132_read_ber, |
|
.read_signal_strength = or51132_read_signal_strength, |
|
.read_snr = or51132_read_snr, |
|
.read_ucblocks = or51132_read_ucblocks, |
|
}; |
|
|
|
module_param(debug, int, 0644); |
|
MODULE_PARM_DESC(debug, "Turn on/off frontend debugging (default:off)."); |
|
|
|
MODULE_DESCRIPTION("OR51132 ATSC [pcHDTV HD-3000] (8VSB & ITU J83 AnnexB FEC QAM64/256) Demodulator Driver"); |
|
MODULE_AUTHOR("Kirk Lapray"); |
|
MODULE_AUTHOR("Trent Piepho"); |
|
MODULE_LICENSE("GPL"); |
|
|
|
EXPORT_SYMBOL(or51132_attach);
|
|
|