7e3e68bcfd
Instead of using the DTV properties cache directly, pass the get frontend data as an argument. For now, everything should remain the same, but the next patch will prevent get_frontend to affect the global cache. This is needed because several drivers don't care enough to only change the properties if locked. Due to that, calling G_PROPERTY before locking on those drivers will make them to never lock. Ok, those drivers are crap and should never be merged like that, but the core should not rely that the drivers would be doing the right thing. Reviewed-by: Michael Ira Krufky <mkrufky@linuxtv.org> Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
654 lines
14 KiB
C
654 lines
14 KiB
C
/*
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Conexant 22702 DVB OFDM demodulator driver
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based on:
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Alps TDMB7 DVB OFDM demodulator driver
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Copyright (C) 2001-2002 Convergence Integrated Media GmbH
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Holger Waechtler <holger@convergence.de>
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Copyright (C) 2004 Steven Toth <stoth@linuxtv.org>
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#include <linux/kernel.h>
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#include <linux/init.h>
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#include <linux/module.h>
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#include <linux/string.h>
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#include <linux/slab.h>
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#include <linux/delay.h>
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#include "dvb_frontend.h"
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#include "cx22702.h"
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struct cx22702_state {
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struct i2c_adapter *i2c;
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/* configuration settings */
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const struct cx22702_config *config;
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struct dvb_frontend frontend;
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/* previous uncorrected block counter */
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u8 prevUCBlocks;
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};
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static int debug;
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module_param(debug, int, 0644);
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MODULE_PARM_DESC(debug, "Enable verbose debug messages");
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#define dprintk if (debug) printk
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/* Register values to initialise the demod */
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static const u8 init_tab[] = {
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0x00, 0x00, /* Stop acquisition */
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0x0B, 0x06,
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0x09, 0x01,
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0x0D, 0x41,
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0x16, 0x32,
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0x20, 0x0A,
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0x21, 0x17,
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0x24, 0x3e,
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0x26, 0xff,
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0x27, 0x10,
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0x28, 0x00,
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0x29, 0x00,
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0x2a, 0x10,
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0x2b, 0x00,
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0x2c, 0x10,
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0x2d, 0x00,
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0x48, 0xd4,
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0x49, 0x56,
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0x6b, 0x1e,
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0xc8, 0x02,
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0xf9, 0x00,
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0xfa, 0x00,
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0xfb, 0x00,
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0xfc, 0x00,
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0xfd, 0x00,
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};
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static int cx22702_writereg(struct cx22702_state *state, u8 reg, u8 data)
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{
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int ret;
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u8 buf[] = { reg, data };
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struct i2c_msg msg = {
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.addr = state->config->demod_address, .flags = 0,
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.buf = buf, .len = 2 };
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ret = i2c_transfer(state->i2c, &msg, 1);
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if (unlikely(ret != 1)) {
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printk(KERN_ERR
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"%s: error (reg == 0x%02x, val == 0x%02x, ret == %i)\n",
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__func__, reg, data, ret);
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return -1;
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}
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return 0;
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}
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static u8 cx22702_readreg(struct cx22702_state *state, u8 reg)
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{
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int ret;
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u8 data;
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struct i2c_msg msg[] = {
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{ .addr = state->config->demod_address, .flags = 0,
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.buf = ®, .len = 1 },
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{ .addr = state->config->demod_address, .flags = I2C_M_RD,
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.buf = &data, .len = 1 } };
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ret = i2c_transfer(state->i2c, msg, 2);
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if (unlikely(ret != 2)) {
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printk(KERN_ERR "%s: error (reg == 0x%02x, ret == %i)\n",
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__func__, reg, ret);
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return 0;
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}
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return data;
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}
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static int cx22702_set_inversion(struct cx22702_state *state, int inversion)
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{
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u8 val;
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val = cx22702_readreg(state, 0x0C);
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switch (inversion) {
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case INVERSION_AUTO:
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return -EOPNOTSUPP;
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case INVERSION_ON:
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val |= 0x01;
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break;
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case INVERSION_OFF:
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val &= 0xfe;
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break;
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default:
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return -EINVAL;
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}
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return cx22702_writereg(state, 0x0C, val);
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}
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/* Retrieve the demod settings */
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static int cx22702_get_tps(struct cx22702_state *state,
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struct dtv_frontend_properties *p)
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{
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u8 val;
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/* Make sure the TPS regs are valid */
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if (!(cx22702_readreg(state, 0x0A) & 0x20))
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return -EAGAIN;
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val = cx22702_readreg(state, 0x01);
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switch ((val & 0x18) >> 3) {
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case 0:
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p->modulation = QPSK;
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break;
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case 1:
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p->modulation = QAM_16;
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break;
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case 2:
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p->modulation = QAM_64;
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break;
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}
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switch (val & 0x07) {
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case 0:
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p->hierarchy = HIERARCHY_NONE;
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break;
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case 1:
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p->hierarchy = HIERARCHY_1;
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break;
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case 2:
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p->hierarchy = HIERARCHY_2;
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break;
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case 3:
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p->hierarchy = HIERARCHY_4;
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break;
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}
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val = cx22702_readreg(state, 0x02);
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switch ((val & 0x38) >> 3) {
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case 0:
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p->code_rate_HP = FEC_1_2;
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break;
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case 1:
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p->code_rate_HP = FEC_2_3;
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break;
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case 2:
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p->code_rate_HP = FEC_3_4;
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break;
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case 3:
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p->code_rate_HP = FEC_5_6;
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break;
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case 4:
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p->code_rate_HP = FEC_7_8;
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break;
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}
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switch (val & 0x07) {
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case 0:
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p->code_rate_LP = FEC_1_2;
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break;
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case 1:
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p->code_rate_LP = FEC_2_3;
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break;
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case 2:
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p->code_rate_LP = FEC_3_4;
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break;
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case 3:
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p->code_rate_LP = FEC_5_6;
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break;
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case 4:
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p->code_rate_LP = FEC_7_8;
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break;
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}
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val = cx22702_readreg(state, 0x03);
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switch ((val & 0x0c) >> 2) {
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case 0:
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p->guard_interval = GUARD_INTERVAL_1_32;
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break;
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case 1:
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p->guard_interval = GUARD_INTERVAL_1_16;
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break;
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case 2:
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p->guard_interval = GUARD_INTERVAL_1_8;
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break;
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case 3:
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p->guard_interval = GUARD_INTERVAL_1_4;
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break;
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}
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switch (val & 0x03) {
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case 0:
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p->transmission_mode = TRANSMISSION_MODE_2K;
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break;
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case 1:
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p->transmission_mode = TRANSMISSION_MODE_8K;
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break;
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}
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return 0;
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}
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static int cx22702_i2c_gate_ctrl(struct dvb_frontend *fe, int enable)
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{
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struct cx22702_state *state = fe->demodulator_priv;
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u8 val;
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dprintk("%s(%d)\n", __func__, enable);
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val = cx22702_readreg(state, 0x0D);
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if (enable)
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val &= 0xfe;
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else
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val |= 0x01;
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return cx22702_writereg(state, 0x0D, val);
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}
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/* Talk to the demod, set the FEC, GUARD, QAM settings etc */
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static int cx22702_set_tps(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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u8 val;
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struct cx22702_state *state = fe->demodulator_priv;
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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)
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fe->ops.i2c_gate_ctrl(fe, 0);
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}
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/* set inversion */
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cx22702_set_inversion(state, p->inversion);
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/* set bandwidth */
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val = cx22702_readreg(state, 0x0C) & 0xcf;
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switch (p->bandwidth_hz) {
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case 6000000:
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val |= 0x20;
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break;
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case 7000000:
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val |= 0x10;
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break;
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case 8000000:
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break;
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default:
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dprintk("%s: invalid bandwidth\n", __func__);
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return -EINVAL;
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}
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cx22702_writereg(state, 0x0C, val);
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p->code_rate_LP = FEC_AUTO; /* temp hack as manual not working */
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/* use auto configuration? */
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if ((p->hierarchy == HIERARCHY_AUTO) ||
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(p->modulation == QAM_AUTO) ||
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(p->code_rate_HP == FEC_AUTO) ||
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(p->code_rate_LP == FEC_AUTO) ||
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(p->guard_interval == GUARD_INTERVAL_AUTO) ||
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(p->transmission_mode == TRANSMISSION_MODE_AUTO)) {
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/* TPS Source - use hardware driven values */
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cx22702_writereg(state, 0x06, 0x10);
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cx22702_writereg(state, 0x07, 0x9);
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cx22702_writereg(state, 0x08, 0xC1);
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cx22702_writereg(state, 0x0B, cx22702_readreg(state, 0x0B)
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& 0xfc);
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cx22702_writereg(state, 0x0C,
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(cx22702_readreg(state, 0x0C) & 0xBF) | 0x40);
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cx22702_writereg(state, 0x00, 0x01); /* Begin acquisition */
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dprintk("%s: Autodetecting\n", __func__);
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return 0;
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}
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/* manually programmed values */
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switch (p->modulation) { /* mask 0x18 */
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case QPSK:
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val = 0x00;
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break;
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case QAM_16:
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val = 0x08;
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break;
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case QAM_64:
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val = 0x10;
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break;
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default:
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dprintk("%s: invalid modulation\n", __func__);
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return -EINVAL;
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}
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switch (p->hierarchy) { /* mask 0x07 */
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case HIERARCHY_NONE:
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break;
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case HIERARCHY_1:
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val |= 0x01;
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break;
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case HIERARCHY_2:
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val |= 0x02;
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break;
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case HIERARCHY_4:
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val |= 0x03;
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break;
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default:
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dprintk("%s: invalid hierarchy\n", __func__);
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return -EINVAL;
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}
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cx22702_writereg(state, 0x06, val);
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switch (p->code_rate_HP) { /* mask 0x38 */
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case FEC_NONE:
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case FEC_1_2:
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val = 0x00;
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break;
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case FEC_2_3:
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val = 0x08;
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break;
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case FEC_3_4:
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val = 0x10;
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break;
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case FEC_5_6:
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val = 0x18;
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break;
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case FEC_7_8:
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val = 0x20;
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break;
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default:
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dprintk("%s: invalid code_rate_HP\n", __func__);
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return -EINVAL;
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}
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switch (p->code_rate_LP) { /* mask 0x07 */
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case FEC_NONE:
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case FEC_1_2:
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break;
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case FEC_2_3:
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val |= 0x01;
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break;
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case FEC_3_4:
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val |= 0x02;
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break;
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case FEC_5_6:
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val |= 0x03;
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break;
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case FEC_7_8:
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val |= 0x04;
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break;
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default:
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dprintk("%s: invalid code_rate_LP\n", __func__);
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return -EINVAL;
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}
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cx22702_writereg(state, 0x07, val);
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switch (p->guard_interval) { /* mask 0x0c */
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case GUARD_INTERVAL_1_32:
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val = 0x00;
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break;
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case GUARD_INTERVAL_1_16:
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val = 0x04;
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break;
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case GUARD_INTERVAL_1_8:
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val = 0x08;
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break;
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case GUARD_INTERVAL_1_4:
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val = 0x0c;
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break;
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default:
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dprintk("%s: invalid guard_interval\n", __func__);
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return -EINVAL;
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}
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switch (p->transmission_mode) { /* mask 0x03 */
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case TRANSMISSION_MODE_2K:
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break;
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case TRANSMISSION_MODE_8K:
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val |= 0x1;
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break;
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default:
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dprintk("%s: invalid transmission_mode\n", __func__);
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return -EINVAL;
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}
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cx22702_writereg(state, 0x08, val);
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cx22702_writereg(state, 0x0B,
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(cx22702_readreg(state, 0x0B) & 0xfc) | 0x02);
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cx22702_writereg(state, 0x0C,
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(cx22702_readreg(state, 0x0C) & 0xBF) | 0x40);
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/* Begin channel acquisition */
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cx22702_writereg(state, 0x00, 0x01);
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return 0;
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}
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/* Reset the demod hardware and reset all of the configuration registers
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to a default state. */
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static int cx22702_init(struct dvb_frontend *fe)
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{
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int i;
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struct cx22702_state *state = fe->demodulator_priv;
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cx22702_writereg(state, 0x00, 0x02);
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msleep(10);
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for (i = 0; i < ARRAY_SIZE(init_tab); i += 2)
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cx22702_writereg(state, init_tab[i], init_tab[i + 1]);
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cx22702_writereg(state, 0xf8, (state->config->output_mode << 1)
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& 0x02);
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cx22702_i2c_gate_ctrl(fe, 0);
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return 0;
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}
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static int cx22702_read_status(struct dvb_frontend *fe, enum fe_status *status)
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{
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struct cx22702_state *state = fe->demodulator_priv;
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u8 reg0A;
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u8 reg23;
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*status = 0;
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reg0A = cx22702_readreg(state, 0x0A);
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reg23 = cx22702_readreg(state, 0x23);
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dprintk("%s: status demod=0x%02x agc=0x%02x\n"
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, __func__, reg0A, reg23);
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if (reg0A & 0x10) {
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*status |= FE_HAS_LOCK;
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*status |= FE_HAS_VITERBI;
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*status |= FE_HAS_SYNC;
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}
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if (reg0A & 0x20)
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*status |= FE_HAS_CARRIER;
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if (reg23 < 0xf0)
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*status |= FE_HAS_SIGNAL;
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return 0;
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}
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static int cx22702_read_ber(struct dvb_frontend *fe, u32 *ber)
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{
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struct cx22702_state *state = fe->demodulator_priv;
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if (cx22702_readreg(state, 0xE4) & 0x02) {
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/* Realtime statistics */
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*ber = (cx22702_readreg(state, 0xDE) & 0x7F) << 7
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| (cx22702_readreg(state, 0xDF) & 0x7F);
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} else {
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/* Averagtine statistics */
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*ber = (cx22702_readreg(state, 0xDE) & 0x7F) << 7
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| cx22702_readreg(state, 0xDF);
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}
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return 0;
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}
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static int cx22702_read_signal_strength(struct dvb_frontend *fe,
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u16 *signal_strength)
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{
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struct cx22702_state *state = fe->demodulator_priv;
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u8 reg23;
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/*
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* Experience suggests that the strength signal register works as
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* follows:
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* - In the absence of signal, value is 0xff.
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* - In the presence of a weak signal, bit 7 is set, not sure what
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* the lower 7 bits mean.
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* - In the presence of a strong signal, the register holds a 7-bit
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* value (bit 7 is cleared), with greater values standing for
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* weaker signals.
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*/
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reg23 = cx22702_readreg(state, 0x23);
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if (reg23 & 0x80) {
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*signal_strength = 0;
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} else {
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reg23 = ~reg23 & 0x7f;
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/* Scale to 16 bit */
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*signal_strength = (reg23 << 9) | (reg23 << 2) | (reg23 >> 5);
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}
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|
return 0;
|
|
}
|
|
|
|
static int cx22702_read_snr(struct dvb_frontend *fe, u16 *snr)
|
|
{
|
|
struct cx22702_state *state = fe->demodulator_priv;
|
|
|
|
u16 rs_ber;
|
|
if (cx22702_readreg(state, 0xE4) & 0x02) {
|
|
/* Realtime statistics */
|
|
rs_ber = (cx22702_readreg(state, 0xDE) & 0x7F) << 7
|
|
| (cx22702_readreg(state, 0xDF) & 0x7F);
|
|
} else {
|
|
/* Averagine statistics */
|
|
rs_ber = (cx22702_readreg(state, 0xDE) & 0x7F) << 8
|
|
| cx22702_readreg(state, 0xDF);
|
|
}
|
|
*snr = ~rs_ber;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int cx22702_read_ucblocks(struct dvb_frontend *fe, u32 *ucblocks)
|
|
{
|
|
struct cx22702_state *state = fe->demodulator_priv;
|
|
|
|
u8 _ucblocks;
|
|
|
|
/* RS Uncorrectable Packet Count then reset */
|
|
_ucblocks = cx22702_readreg(state, 0xE3);
|
|
if (state->prevUCBlocks < _ucblocks)
|
|
*ucblocks = (_ucblocks - state->prevUCBlocks);
|
|
else
|
|
*ucblocks = state->prevUCBlocks - _ucblocks;
|
|
state->prevUCBlocks = _ucblocks;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int cx22702_get_frontend(struct dvb_frontend *fe,
|
|
struct dtv_frontend_properties *c)
|
|
{
|
|
struct cx22702_state *state = fe->demodulator_priv;
|
|
|
|
u8 reg0C = cx22702_readreg(state, 0x0C);
|
|
|
|
c->inversion = reg0C & 0x1 ? INVERSION_ON : INVERSION_OFF;
|
|
return cx22702_get_tps(state, c);
|
|
}
|
|
|
|
static int cx22702_get_tune_settings(struct dvb_frontend *fe,
|
|
struct dvb_frontend_tune_settings *tune)
|
|
{
|
|
tune->min_delay_ms = 1000;
|
|
return 0;
|
|
}
|
|
|
|
static void cx22702_release(struct dvb_frontend *fe)
|
|
{
|
|
struct cx22702_state *state = fe->demodulator_priv;
|
|
kfree(state);
|
|
}
|
|
|
|
static const struct dvb_frontend_ops cx22702_ops;
|
|
|
|
struct dvb_frontend *cx22702_attach(const struct cx22702_config *config,
|
|
struct i2c_adapter *i2c)
|
|
{
|
|
struct cx22702_state *state = NULL;
|
|
|
|
/* allocate memory for the internal state */
|
|
state = kzalloc(sizeof(struct cx22702_state), GFP_KERNEL);
|
|
if (state == NULL)
|
|
goto error;
|
|
|
|
/* setup the state */
|
|
state->config = config;
|
|
state->i2c = i2c;
|
|
|
|
/* check if the demod is there */
|
|
if (cx22702_readreg(state, 0x1f) != 0x3)
|
|
goto error;
|
|
|
|
/* create dvb_frontend */
|
|
memcpy(&state->frontend.ops, &cx22702_ops,
|
|
sizeof(struct dvb_frontend_ops));
|
|
state->frontend.demodulator_priv = state;
|
|
return &state->frontend;
|
|
|
|
error:
|
|
kfree(state);
|
|
return NULL;
|
|
}
|
|
EXPORT_SYMBOL(cx22702_attach);
|
|
|
|
static const struct dvb_frontend_ops cx22702_ops = {
|
|
.delsys = { SYS_DVBT },
|
|
.info = {
|
|
.name = "Conexant CX22702 DVB-T",
|
|
.frequency_min = 177000000,
|
|
.frequency_max = 858000000,
|
|
.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_QPSK | FE_CAN_QAM_16 | FE_CAN_QAM_64 | FE_CAN_QAM_AUTO |
|
|
FE_CAN_HIERARCHY_AUTO | FE_CAN_GUARD_INTERVAL_AUTO |
|
|
FE_CAN_TRANSMISSION_MODE_AUTO | FE_CAN_RECOVER
|
|
},
|
|
|
|
.release = cx22702_release,
|
|
|
|
.init = cx22702_init,
|
|
.i2c_gate_ctrl = cx22702_i2c_gate_ctrl,
|
|
|
|
.set_frontend = cx22702_set_tps,
|
|
.get_frontend = cx22702_get_frontend,
|
|
.get_tune_settings = cx22702_get_tune_settings,
|
|
|
|
.read_status = cx22702_read_status,
|
|
.read_ber = cx22702_read_ber,
|
|
.read_signal_strength = cx22702_read_signal_strength,
|
|
.read_snr = cx22702_read_snr,
|
|
.read_ucblocks = cx22702_read_ucblocks,
|
|
};
|
|
|
|
MODULE_DESCRIPTION("Conexant CX22702 DVB-T Demodulator driver");
|
|
MODULE_AUTHOR("Steven Toth");
|
|
MODULE_LICENSE("GPL");
|