AuxXxilium/linux_dsm_epyc7002
1
0
Fork 0
mirror of https://github.com/AuxXxilium/linux_dsm_epyc7002.git synced 2024-11-25 22:10:49 +07:00
Code Issues Actions Packages Projects Releases Wiki Activity
0cb73639cf
linux_dsm_epyc7002/drivers/media/dvb/frontends/or51211.c
Matthias Schwarzott 084e24acc9 V4L/DVB (12440): Use kzalloc for frontend states to have struct dvb_frontend properly 
This patch changes most frontend drivers to allocate their state structure via
kzalloc and not kmalloc. This is done to properly initialize the
embedded "struct dvb_frontend frontend" field, that they all have.

The visible effect of this struct being uninitalized is, that the member "id"
that is used to set the name of kernel thread is totally random.

Some board drivers (for example cx88-dvb) set this "id" via
videobuf_dvb_alloc_frontend but most do not.

So I at least get random id values for saa7134, flexcop and ttpci based cards.
It looks like this in dmesg:
DVB: registering adapter 1 frontend -10551321 (ST STV0299 DVB-S)

The related kernel thread then also gets a strange name
like "kdvb-ad-1-fe--1".

Cc: Michael Krufky <mkrufky@linuxtv.org>
Cc: Steven Toth <stoth@linuxtv.org>
Cc: Timothy Lee <timothy.lee@siriushk.com>
Cc: Igor M. Liplianin <liplianin@me.by>
Signed-off-by: Matthias Schwarzott <zzam@gentoo.org>
Acked-by: Andreas Oberritter <obi@linuxtv.org>
Signed-off-by: Douglas Schilling Landgraf <dougsland@redhat.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2009-08-13 20:39:14 -03:00

583 lines
15 KiB
C
Raw Blame History

/*
* 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/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, const u8 *buf,
int len)
{
int err;
struct i2c_msg msg;
msg.addr = reg;
msg.flags = 0;
msg.len = len;
msg.buf = (u8 *)buf;
if ((err = i2c_transfer (state->i2c, &msg, 1)) != 1) {
printk(KERN_WARNING "or51211: i2c_writebytes error "
"(addr %02x, err == %i)\n", reg, err);
return -EREMOTEIO;
}
return 0;
}
static int i2c_readbytes(struct or51211_state *state, u8 reg, u8 *buf, int len)
{
int err;
struct i2c_msg msg;
msg.addr = reg;
msg.flags = I2C_M_RD;
msg.len = len;
msg.buf = buf;
if ((err = i2c_transfer (state->i2c, &msg, 1)) != 1) {
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",
__func__);
return -1;
}
if (i2c_readbytes(state,state->config->demod_address,rec_buf,2)) {
printk(KERN_WARNING "%s: read_status read error\n",
__func__);
return -1;
}
state->snr = calculate_snr(rec_buf[0], 89599047);
*snr = (state->snr) >> 16;
dprintk("%s: noise = 0x%02x, snr = %d.%02d dB\n", __func__, 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 = kzalloc(sizeof(struct or51211_state), GFP_KERNEL);
if (state == NULL)
return NULL;
/* Setup the state */
state->config = config;
state->i2c = i2c;
state->initialized = 0;
state->current_frequency = 0;
/* Create dvb_frontend */
memcpy(&state->frontend.ops, &or51211_ops, sizeof(struct dvb_frontend_ops));
state->frontend.demodulator_priv = state;
return &state->frontend;
}
static 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);
Reference in New Issue View Git Blame Copy Permalink