kevin/linux
1
Fork 0
Code
940cc2df93
linux/drivers/media/dvb/frontends/or51211.c
Magnus Damm 73ca66b97b [PATCH] release_firmware() fixes 
Use release_firmware() to free requested resources.

According to Documentation/firmware_class/README the request_firmware()
call should be followed by a release_firmware().  Some drivers do not
however free the firmware previously allocated with request_firmware().
This patch tries to fix this by making sure that release_firmware() is used
as expected.

Signed-off-by: Magnus Damm <magnus@valinux.co.jp>
Acked-by: Marcel Holtmann <marcel@holtmann.org>
Cc: Mauro Carvalho Chehab <mchehab@infradead.org>
Cc: "John W. Linville" <linville@tuxdriver.com>
Cc: Greg KH <greg@kroah.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-07-10 13:24:15 -07:00

637 lines
17 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/moduleparam.h>
#include <linux/device.h>
#include <linux/firmware.h>
#include <linux/string.h>
#include <linux/slab.h>
#include <asm/byteorder.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;
/* Tuner private data */
u32 current_frequency;
};
static int i2c_writebytes (struct or51211_state* state, u8 reg, u8 *buf,
int len)
{
int err;
struct i2c_msg msg;
msg.addr = reg;
msg.flags = 0;
msg.len = len;
msg.buf = buf;
if ((err = i2c_transfer (state->i2c, &msg, 1)) != 1) {
printk(KERN_WARNING "or51211: i2c_writebytes error "
"(addr %02x, err == %i)\n", reg, err);
return -EREMOTEIO;
}
return 0;
}
static u8 i2c_readbytes (struct or51211_state* state, u8 reg, u8* buf, int len)
{
int err;
struct i2c_msg msg;
msg.addr = reg;
msg.flags = I2C_M_RD;
msg.len = len;
msg.buf = buf;
if ((err = i2c_transfer (state->i2c, &msg, 1)) != 1) {
printk(KERN_WARNING "or51211: i2c_readbytes error "
"(addr %02x, err == %i)\n", reg, err);
return -EREMOTEIO;
}
return 0;
}
static int or51211_load_firmware (struct dvb_frontend* fe,
const struct firmware *fw)
{
struct or51211_state* state = fe->demodulator_priv;
u8 tudata[585];
int i;
dprintk("Firmware is %zd bytes\n",fw->size);
/* Get eprom data */
tudata[0] = 17;
if (i2c_writebytes(state,0x50,tudata,1)) {
printk(KERN_WARNING "or51211:load_firmware error eprom addr\n");
return -1;
}
if (i2c_readbytes(state,0x50,&tudata[145],192)) {
printk(KERN_WARNING "or51211: load_firmware error eprom\n");
return -1;
}
/* Create firmware buffer */
for (i = 0; i < 145; i++)
tudata[i] = fw->data[i];
for (i = 0; i < 248; i++)
tudata[i+337] = fw->data[145+i];
state->config->reset(fe);
if (i2c_writebytes(state,state->config->demod_address,tudata,585)) {
printk(KERN_WARNING "or51211: load_firmware error 1\n");
return -1;
}
msleep(1);
if (i2c_writebytes(state,state->config->demod_address,
&fw->data[393],8125)) {
printk(KERN_WARNING "or51211: load_firmware error 2\n");
return -1;
}
msleep(1);
if (i2c_writebytes(state,state->config->demod_address,run_buf,2)) {
printk(KERN_WARNING "or51211: load_firmware error 3\n");
return -1;
}
/* Wait at least 5 msec */
msleep(10);
if (i2c_writebytes(state,state->config->demod_address,run_buf,2)) {
printk(KERN_WARNING "or51211: load_firmware error 4\n");
return -1;
}
msleep(10);
printk("or51211: Done.\n");
return 0;
};
static int or51211_setmode(struct dvb_frontend* fe, int mode)
{
struct or51211_state* state = fe->demodulator_priv;
u8 rec_buf[14];
state->config->setmode(fe, mode);
if (i2c_writebytes(state,state->config->demod_address,run_buf,2)) {
printk(KERN_WARNING "or51211: setmode error 1\n");
return -1;
}
/* Wait at least 5 msec */
msleep(10);
if (i2c_writebytes(state,state->config->demod_address,run_buf,2)) {
printk(KERN_WARNING "or51211: setmode error 2\n");
return -1;
}
msleep(10);
/* Set operation mode in Receiver 1 register;
* type 1:
* data 0x50h Automatic sets receiver channel conditions
* Automatic NTSC rejection filter
* Enable MPEG serial data output
* MPEG2tr
* High tuner phase noise
* normal +/-150kHz Carrier acquisition range
*/
if (i2c_writebytes(state,state->config->demod_address,cmd_buf,3)) {
printk(KERN_WARNING "or51211: setmode error 3\n");
return -1;
}
rec_buf[0] = 0x04;
rec_buf[1] = 0x00;
rec_buf[2] = 0x03;
rec_buf[3] = 0x00;
msleep(20);
if (i2c_writebytes(state,state->config->demod_address,rec_buf,3)) {
printk(KERN_WARNING "or51211: setmode error 5\n");
}
msleep(3);
if (i2c_readbytes(state,state->config->demod_address,&rec_buf[10],2)) {
printk(KERN_WARNING "or51211: setmode error 6");
return -1;
}
dprintk("setmode rec status %02x %02x\n",rec_buf[10],rec_buf[11]);
return 0;
}
static int or51211_set_parameters(struct dvb_frontend* fe,
struct dvb_frontend_parameters *param)
{
struct or51211_state* state = fe->demodulator_priv;
u32 freq = 0;
u16 tunerfreq = 0;
u8 buf[4];
/* Change only if we are actually changing the channel */
if (state->current_frequency != param->frequency) {
freq = 44000 + (param->frequency/1000);
tunerfreq = freq * 16/1000;
dprintk("set_parameters frequency = %d (tunerfreq = %d)\n",
param->frequency,tunerfreq);
buf[0] = (tunerfreq >> 8) & 0x7F;
buf[1] = (tunerfreq & 0xFF);
buf[2] = 0x8E;
if (param->frequency < 157250000) {
buf[3] = 0xA0;
dprintk("set_parameters VHF low range\n");
} else if (param->frequency < 454000000) {
buf[3] = 0x90;
dprintk("set_parameters VHF high range\n");
} else {
buf[3] = 0x30;
dprintk("set_parameters UHF range\n");
}
dprintk("set_parameters tuner bytes: 0x%02x 0x%02x "
"0x%02x 0x%02x\n",buf[0],buf[1],buf[2],buf[3]);
if (i2c_writebytes(state,0xC2>>1,buf,4))
printk(KERN_WARNING "or51211:set_parameters error "
"writing to tuner\n");
/* 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;
}
/* log10-1 table at .5 increments from 1 to 100.5 */
static unsigned int i100x20log10[] = {
0, 352, 602, 795, 954, 1088, 1204, 1306, 1397, 1480,
1556, 1625, 1690, 1750, 1806, 1858, 1908, 1955, 2000, 2042,
2082, 2121, 2158, 2193, 2227, 2260, 2292, 2322, 2352, 2380,
2408, 2434, 2460, 2486, 2510, 2534, 2557, 2580, 2602, 2623,
2644, 2664, 2684, 2704, 2723, 2742, 2760, 2778, 2795, 2813,
2829, 2846, 2862, 2878, 2894, 2909, 2924, 2939, 2954, 2968,
2982, 2996, 3010, 3023, 3037, 3050, 3062, 3075, 3088, 3100,
3112, 3124, 3136, 3148, 3159, 3170, 3182, 3193, 3204, 3214,
3225, 3236, 3246, 3256, 3266, 3276, 3286, 3296, 3306, 3316,
3325, 3334, 3344, 3353, 3362, 3371, 3380, 3389, 3397, 3406,
3415, 3423, 3432, 3440, 3448, 3456, 3464, 3472, 3480, 3488,
3496, 3504, 3511, 3519, 3526, 3534, 3541, 3549, 3556, 3563,
3570, 3577, 3584, 3591, 3598, 3605, 3612, 3619, 3625, 3632,
3639, 3645, 3652, 3658, 3665, 3671, 3677, 3683, 3690, 3696,
3702, 3708, 3714, 3720, 3726, 3732, 3738, 3744, 3750, 3755,
3761, 3767, 3772, 3778, 3784, 3789, 3795, 3800, 3806, 3811,
3816, 3822, 3827, 3832, 3838, 3843, 3848, 3853, 3858, 3863,
3868, 3874, 3879, 3884, 3888, 3893, 3898, 3903, 3908, 3913,
3918, 3922, 3927, 3932, 3936, 3941, 3946, 3950, 3955, 3960,
3964, 3969, 3973, 3978, 3982, 3986, 3991, 3995, 4000, 4004,
};
static unsigned int denom[] = {1,1,100,1000,10000,100000,1000000,10000000,100000000};
static unsigned int i20Log10(unsigned short val)
{
unsigned int rntval = 100;
unsigned int tmp = val;
unsigned int exp = 1;
while(tmp > 100) {tmp /= 100; exp++;}
val = (2 * val)/denom[exp];
if (exp > 1) rntval = 2000*exp;
rntval += i100x20log10[val];
return rntval;
}
static int or51211_read_signal_strength(struct dvb_frontend* fe, u16* strength)
{
struct or51211_state* state = fe->demodulator_priv;
u8 rec_buf[2];
u8 snd_buf[4];
u8 snr_equ;
u32 signal_strength;
/* SNR after Equalizer */
snd_buf[0] = 0x04;
snd_buf[1] = 0x00;
snd_buf[2] = 0x04;
snd_buf[3] = 0x00;
if (i2c_writebytes(state,state->config->demod_address,snd_buf,3)) {
printk(KERN_WARNING "or51211: read_status write error\n");
return -1;
}
msleep(3);
if (i2c_readbytes(state,state->config->demod_address,rec_buf,2)) {
printk(KERN_WARNING "or51211: read_status read error\n");
return -1;
}
snr_equ = rec_buf[0] & 0xff;
/* The value reported back from the frontend will be FFFF=100% 0000=0% */
signal_strength = (((5334 - i20Log10(snr_equ))/3+5)*65535)/1000;
if (signal_strength > 0xffff)
*strength = 0xffff;
else
*strength = signal_strength;
dprintk("read_signal_strength %i\n",*strength);
return 0;
}
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[4];
/* SNR after Equalizer */
snd_buf[0] = 0x04;
snd_buf[1] = 0x00;
snd_buf[2] = 0x04;
snd_buf[3] = 0x00;
if (i2c_writebytes(state,state->config->demod_address,snd_buf,3)) {
printk(KERN_WARNING "or51211: read_status write error\n");
return -1;
}
msleep(3);
if (i2c_readbytes(state,state->config->demod_address,rec_buf,2)) {
printk(KERN_WARNING "or51211: read_status read error\n");
return -1;
}
*snr = rec_buf[0] & 0xff;
dprintk("read_snr %i\n",*snr);
return 0;
}
static int or51211_read_ber(struct dvb_frontend* fe, u32* ber)
{
*ber = -ENOSYS;
return 0;
}
static int or51211_read_ucblocks(struct dvb_frontend* fe, u32* ucblocks)
{
*ucblocks = -ENOSYS;
return 0;
}
static int or51211_sleep(struct dvb_frontend* fe)
{
return 0;
}
static int or51211_init(struct dvb_frontend* fe)
{
struct or51211_state* state = fe->demodulator_priv;
const struct or51211_config* config = state->config;
const struct firmware* fw;
unsigned char get_ver_buf[] = {0x04,0x00,0x30,0x00,0x00};
unsigned char rec_buf[14];
int ret,i;
if (!state->initialized) {
/* Request the firmware, this will block until it uploads */
printk(KERN_INFO "or51211: Waiting for firmware upload "
"(%s)...\n", OR51211_DEFAULT_FIRMWARE);
ret = config->request_firmware(fe, &fw,
OR51211_DEFAULT_FIRMWARE);
printk(KERN_INFO "or51211:Got Hotplug firmware\n");
if (ret) {
printk(KERN_WARNING "or51211: No firmware uploaded "
"(timeout or file not found?)\n");
return ret;
}
ret = or51211_load_firmware(fe, fw);
release_firmware(fw);
if (ret) {
printk(KERN_WARNING "or51211: Writing firmware to "
"device failed!\n");
return ret;
}
printk(KERN_INFO "or51211: Firmware upload complete.\n");
/* Set operation mode in Receiver 1 register;
* type 1:
* data 0x50h Automatic sets receiver channel conditions
* Automatic NTSC rejection filter
* Enable MPEG serial data output
* MPEG2tr
* High tuner phase noise
* normal +/-150kHz Carrier acquisition range
*/
if (i2c_writebytes(state,state->config->demod_address,
cmd_buf,3)) {
printk(KERN_WARNING "or51211: Load DVR Error 5\n");
return -1;
}
/* Read back ucode version to besure we loaded correctly */
/* and are really up and running */
rec_buf[0] = 0x04;
rec_buf[1] = 0x00;
rec_buf[2] = 0x03;
rec_buf[3] = 0x00;
msleep(30);
if (i2c_writebytes(state,state->config->demod_address,
rec_buf,3)) {
printk(KERN_WARNING "or51211: Load DVR Error A\n");
return -1;
}
msleep(3);
if (i2c_readbytes(state,state->config->demod_address,
&rec_buf[10],2)) {
printk(KERN_WARNING "or51211: Load DVR Error B\n");
return -1;
}
rec_buf[0] = 0x04;
rec_buf[1] = 0x00;
rec_buf[2] = 0x01;
rec_buf[3] = 0x00;
msleep(20);
if (i2c_writebytes(state,state->config->demod_address,
rec_buf,3)) {
printk(KERN_WARNING "or51211: Load DVR Error C\n");
return -1;
}
msleep(3);
if (i2c_readbytes(state,state->config->demod_address,
&rec_buf[12],2)) {
printk(KERN_WARNING "or51211: Load DVR Error D\n");
return -1;
}
for (i = 0; i < 8; i++)
rec_buf[i]=0xed;
for (i = 0; i < 5; i++) {
msleep(30);
get_ver_buf[4] = i+1;
if (i2c_writebytes(state,state->config->demod_address,
get_ver_buf,5)) {
printk(KERN_WARNING "or51211:Load DVR Error 6"
" - %d\n",i);
return -1;
}
msleep(3);
if (i2c_readbytes(state,state->config->demod_address,
&rec_buf[i*2],2)) {
printk(KERN_WARNING "or51211:Load DVR Error 7"
" - %d\n",i);
return -1;
}
/* If we didn't receive the right index, try again */
if ((int)rec_buf[i*2+1]!=i+1){
i--;
}
}
dprintk("read_fwbits %x %x %x %x %x %x %x %x %x %x\n",
rec_buf[0], rec_buf[1], rec_buf[2], rec_buf[3],
rec_buf[4], rec_buf[5], rec_buf[6], rec_buf[7],
rec_buf[8], rec_buf[9]);
printk(KERN_INFO "or51211: ver TU%02x%02x%02x VSB mode %02x"
" Status %02x\n",
rec_buf[2], rec_buf[4],rec_buf[6],
rec_buf[12],rec_buf[10]);
rec_buf[0] = 0x04;
rec_buf[1] = 0x00;
rec_buf[2] = 0x03;
rec_buf[3] = 0x00;
msleep(20);
if (i2c_writebytes(state,state->config->demod_address,
rec_buf,3)) {
printk(KERN_WARNING "or51211: Load DVR Error 8\n");
return -1;
}
msleep(20);
if (i2c_readbytes(state,state->config->demod_address,
&rec_buf[8],2)) {
printk(KERN_WARNING "or51211: Load DVR Error 9\n");
return -1;
}
state->initialized = 1;
}
return 0;
}
static int or51211_get_tune_settings(struct dvb_frontend* fe,
struct dvb_frontend_tune_settings* fesettings)
{
fesettings->min_delay_ms = 500;
fesettings->step_size = 0;
fesettings->max_drift = 0;
return 0;
}
static void or51211_release(struct dvb_frontend* fe)
{
struct or51211_state* state = fe->demodulator_priv;
state->config->sleep(fe);
kfree(state);
}
static struct dvb_frontend_ops or51211_ops;
struct dvb_frontend* or51211_attach(const struct or51211_config* config,
struct i2c_adapter* i2c)
{
struct or51211_state* state = NULL;
/* Allocate memory for the internal state */
state = kmalloc(sizeof(struct or51211_state), GFP_KERNEL);
if (state == NULL)
goto error;
/* Setup the state */
state->config = config;
state->i2c = i2c;
state->initialized = 0;
state->current_frequency = 0;
/* Create dvb_frontend */
memcpy(&state->frontend.ops, &or51211_ops, sizeof(struct dvb_frontend_ops));
state->frontend.demodulator_priv = state;
return &state->frontend;
error:
kfree(state);
return NULL;
}
static struct dvb_frontend_ops or51211_ops = {
.info = {
.name = "Oren OR51211 VSB Frontend",
.type = FE_ATSC,
.frequency_min = 44000000,
.frequency_max = 958000000,
.frequency_stepsize = 166666,
.caps = FE_CAN_FEC_1_2 | FE_CAN_FEC_2_3 | FE_CAN_FEC_3_4 |
FE_CAN_FEC_5_6 | FE_CAN_FEC_7_8 | FE_CAN_FEC_AUTO |
FE_CAN_8VSB
},
.release = or51211_release,
.init = or51211_init,
.sleep = or51211_sleep,
.set_frontend = or51211_set_parameters,
.get_tune_settings = or51211_get_tune_settings,
.read_status = or51211_read_status,
.read_ber = or51211_read_ber,
.read_signal_strength = or51211_read_signal_strength,
.read_snr = or51211_read_snr,
.read_ucblocks = or51211_read_ucblocks,
};
module_param(debug, int, 0644);
MODULE_PARM_DESC(debug, "Turn on/off frontend debugging (default:off).");
MODULE_DESCRIPTION("Oren OR51211 VSB [pcHDTV HD-2000] Demodulator Driver");
MODULE_AUTHOR("Kirk Lapray");
MODULE_LICENSE("GPL");
EXPORT_SYMBOL(or51211_attach);
View Git Blame Copy Permalink