linux/drivers/media/video/tlg2300/pd-dvb.c

597 lines
14 KiB
C

#include "pd-common.h"
#include <linux/kernel.h>
#include <linux/usb.h>
#include <linux/dvb/dmx.h>
#include <linux/delay.h>
#include <linux/gfp.h>
#include "vendorcmds.h"
#include <linux/sched.h>
#include <asm/atomic.h>
static void dvb_urb_cleanup(struct pd_dvb_adapter *pd_dvb);
static int dvb_bandwidth[][2] = {
{ TLG_BW_8, BANDWIDTH_8_MHZ },
{ TLG_BW_7, BANDWIDTH_7_MHZ },
{ TLG_BW_6, BANDWIDTH_6_MHZ }
};
static int dvb_bandwidth_length = ARRAY_SIZE(dvb_bandwidth);
static s32 dvb_start_streaming(struct pd_dvb_adapter *pd_dvb);
static int poseidon_check_mode_dvbt(struct poseidon *pd)
{
s32 ret = 0, cmd_status = 0;
set_current_state(TASK_INTERRUPTIBLE);
schedule_timeout(HZ/4);
ret = usb_set_interface(pd->udev, 0, BULK_ALTERNATE_IFACE);
if (ret != 0)
return ret;
ret = set_tuner_mode(pd, TLG_MODE_CAPS_DVB_T);
if (ret)
return ret;
/* signal source */
ret = send_set_req(pd, SGNL_SRC_SEL, TLG_SIG_SRC_ANTENNA, &cmd_status);
if (ret|cmd_status)
return ret;
return 0;
}
/* acquire :
* 1 == open
* 0 == release
*/
static int poseidon_ts_bus_ctrl(struct dvb_frontend *fe, int acquire)
{
struct poseidon *pd = fe->demodulator_priv;
struct pd_dvb_adapter *pd_dvb;
int ret = 0;
if (!pd)
return -ENODEV;
pd_dvb = container_of(fe, struct pd_dvb_adapter, dvb_fe);
if (acquire) {
mutex_lock(&pd->lock);
if (pd->state & POSEIDON_STATE_DISCONNECT) {
ret = -ENODEV;
goto open_out;
}
if (pd->state && !(pd->state & POSEIDON_STATE_DVBT)) {
ret = -EBUSY;
goto open_out;
}
usb_autopm_get_interface(pd->interface);
if (0 == pd->state) {
ret = poseidon_check_mode_dvbt(pd);
if (ret < 0) {
usb_autopm_put_interface(pd->interface);
goto open_out;
}
pd->state |= POSEIDON_STATE_DVBT;
pd_dvb->bandwidth = 0;
pd_dvb->prev_freq = 0;
}
atomic_inc(&pd_dvb->users);
kref_get(&pd->kref);
open_out:
mutex_unlock(&pd->lock);
} else {
dvb_stop_streaming(pd_dvb);
if (atomic_dec_and_test(&pd_dvb->users)) {
mutex_lock(&pd->lock);
pd->state &= ~POSEIDON_STATE_DVBT;
mutex_unlock(&pd->lock);
}
kref_put(&pd->kref, poseidon_delete);
usb_autopm_put_interface(pd->interface);
}
return ret;
}
#ifdef CONFIG_PM
static void poseidon_fe_release(struct dvb_frontend *fe)
{
struct poseidon *pd = fe->demodulator_priv;
pd->pm_suspend = NULL;
pd->pm_resume = NULL;
}
#else
#define poseidon_fe_release NULL
#endif
static s32 poseidon_fe_sleep(struct dvb_frontend *fe)
{
return 0;
}
/*
* return true if we can satisfy the conditions, else return false.
*/
static bool check_scan_ok(__u32 freq, int bandwidth,
struct pd_dvb_adapter *adapter)
{
if (bandwidth < 0)
return false;
if (adapter->prev_freq == freq
&& adapter->bandwidth == bandwidth) {
long nl = jiffies - adapter->last_jiffies;
unsigned int msec ;
msec = jiffies_to_msecs(abs(nl));
return msec > 15000 ? true : false;
}
return true;
}
/*
* Check if the firmware delays too long for an invalid frequency.
*/
static int fw_delay_overflow(struct pd_dvb_adapter *adapter)
{
long nl = jiffies - adapter->last_jiffies;
unsigned int msec ;
msec = jiffies_to_msecs(abs(nl));
return msec > 800 ? true : false;
}
static int poseidon_set_fe(struct dvb_frontend *fe,
struct dvb_frontend_parameters *fep)
{
s32 ret = 0, cmd_status = 0;
s32 i, bandwidth = -1;
struct poseidon *pd = fe->demodulator_priv;
struct pd_dvb_adapter *pd_dvb = &pd->dvb_data;
if (in_hibernation(pd))
return -EBUSY;
mutex_lock(&pd->lock);
for (i = 0; i < dvb_bandwidth_length; i++)
if (fep->u.ofdm.bandwidth == dvb_bandwidth[i][1])
bandwidth = dvb_bandwidth[i][0];
if (check_scan_ok(fep->frequency, bandwidth, pd_dvb)) {
ret = send_set_req(pd, TUNE_FREQ_SELECT,
fep->frequency / 1000, &cmd_status);
if (ret | cmd_status) {
log("error line");
goto front_out;
}
ret = send_set_req(pd, DVBT_BANDW_SEL,
bandwidth, &cmd_status);
if (ret | cmd_status) {
log("error line");
goto front_out;
}
ret = send_set_req(pd, TAKE_REQUEST, 0, &cmd_status);
if (ret | cmd_status) {
log("error line");
goto front_out;
}
/* save the context for future */
memcpy(&pd_dvb->fe_param, fep, sizeof(*fep));
pd_dvb->bandwidth = bandwidth;
pd_dvb->prev_freq = fep->frequency;
pd_dvb->last_jiffies = jiffies;
}
front_out:
mutex_unlock(&pd->lock);
return ret;
}
#ifdef CONFIG_PM
static int pm_dvb_suspend(struct poseidon *pd)
{
struct pd_dvb_adapter *pd_dvb = &pd->dvb_data;
dvb_stop_streaming(pd_dvb);
dvb_urb_cleanup(pd_dvb);
msleep(500);
return 0;
}
static int pm_dvb_resume(struct poseidon *pd)
{
struct pd_dvb_adapter *pd_dvb = &pd->dvb_data;
poseidon_check_mode_dvbt(pd);
msleep(300);
poseidon_set_fe(&pd_dvb->dvb_fe, &pd_dvb->fe_param);
dvb_start_streaming(pd_dvb);
return 0;
}
#endif
static s32 poseidon_fe_init(struct dvb_frontend *fe)
{
struct poseidon *pd = fe->demodulator_priv;
struct pd_dvb_adapter *pd_dvb = &pd->dvb_data;
#ifdef CONFIG_PM
pd->pm_suspend = pm_dvb_suspend;
pd->pm_resume = pm_dvb_resume;
#endif
memset(&pd_dvb->fe_param, 0,
sizeof(struct dvb_frontend_parameters));
return 0;
}
static int poseidon_get_fe(struct dvb_frontend *fe,
struct dvb_frontend_parameters *fep)
{
struct poseidon *pd = fe->demodulator_priv;
struct pd_dvb_adapter *pd_dvb = &pd->dvb_data;
memcpy(fep, &pd_dvb->fe_param, sizeof(*fep));
return 0;
}
static int poseidon_fe_get_tune_settings(struct dvb_frontend *fe,
struct dvb_frontend_tune_settings *tune)
{
tune->min_delay_ms = 1000;
return 0;
}
static int poseidon_read_status(struct dvb_frontend *fe, fe_status_t *stat)
{
struct poseidon *pd = fe->demodulator_priv;
s32 ret = -1, cmd_status;
struct tuner_dtv_sig_stat_s status = {};
if (in_hibernation(pd))
return -EBUSY;
mutex_lock(&pd->lock);
ret = send_get_req(pd, TUNER_STATUS, TLG_MODE_DVB_T,
&status, &cmd_status, sizeof(status));
if (ret | cmd_status) {
log("get tuner status error");
goto out;
}
if (debug_mode)
log("P : %d, L %d, LB :%d", status.sig_present,
status.sig_locked, status.sig_lock_busy);
if (status.sig_lock_busy) {
goto out;
} else if (status.sig_present || status.sig_locked) {
*stat |= FE_HAS_LOCK | FE_HAS_SIGNAL | FE_HAS_CARRIER
| FE_HAS_SYNC | FE_HAS_VITERBI;
} else {
if (fw_delay_overflow(&pd->dvb_data))
*stat |= FE_TIMEDOUT;
}
out:
mutex_unlock(&pd->lock);
return ret;
}
static int poseidon_read_ber(struct dvb_frontend *fe, u32 *ber)
{
struct poseidon *pd = fe->demodulator_priv;
struct tuner_ber_rate_s tlg_ber = {};
s32 ret = -1, cmd_status;
mutex_lock(&pd->lock);
ret = send_get_req(pd, TUNER_BER_RATE, 0,
&tlg_ber, &cmd_status, sizeof(tlg_ber));
if (ret | cmd_status)
goto out;
*ber = tlg_ber.ber_rate;
out:
mutex_unlock(&pd->lock);
return ret;
}
static s32 poseidon_read_signal_strength(struct dvb_frontend *fe, u16 *strength)
{
struct poseidon *pd = fe->demodulator_priv;
struct tuner_dtv_sig_stat_s status = {};
s32 ret = 0, cmd_status;
mutex_lock(&pd->lock);
ret = send_get_req(pd, TUNER_STATUS, TLG_MODE_DVB_T,
&status, &cmd_status, sizeof(status));
if (ret | cmd_status)
goto out;
if ((status.sig_present || status.sig_locked) && !status.sig_strength)
*strength = 0xFFFF;
else
*strength = status.sig_strength;
out:
mutex_unlock(&pd->lock);
return ret;
}
static int poseidon_read_snr(struct dvb_frontend *fe, u16 *snr)
{
return 0;
}
static int poseidon_read_unc_blocks(struct dvb_frontend *fe, u32 *unc)
{
*unc = 0;
return 0;
}
static struct dvb_frontend_ops poseidon_frontend_ops = {
.info = {
.name = "Poseidon DVB-T",
.type = FE_OFDM,
.frequency_min = 174000000,
.frequency_max = 862000000,
.frequency_stepsize = 62500,/* FIXME */
.caps = FE_CAN_INVERSION_AUTO |
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_TRANSMISSION_MODE_AUTO |
FE_CAN_GUARD_INTERVAL_AUTO |
FE_CAN_RECOVER |
FE_CAN_HIERARCHY_AUTO,
},
.release = poseidon_fe_release,
.init = poseidon_fe_init,
.sleep = poseidon_fe_sleep,
.set_frontend = poseidon_set_fe,
.get_frontend = poseidon_get_fe,
.get_tune_settings = poseidon_fe_get_tune_settings,
.read_status = poseidon_read_status,
.read_ber = poseidon_read_ber,
.read_signal_strength = poseidon_read_signal_strength,
.read_snr = poseidon_read_snr,
.read_ucblocks = poseidon_read_unc_blocks,
.ts_bus_ctrl = poseidon_ts_bus_ctrl,
};
static void dvb_urb_irq(struct urb *urb)
{
struct pd_dvb_adapter *pd_dvb = urb->context;
int len = urb->transfer_buffer_length;
struct dvb_demux *demux = &pd_dvb->demux;
s32 ret;
if (!pd_dvb->is_streaming || urb->status) {
if (urb->status == -EPROTO)
goto resend;
return;
}
if (urb->actual_length == len)
dvb_dmx_swfilter(demux, urb->transfer_buffer, len);
else if (urb->actual_length == len - 4) {
int offset;
u8 *buf = urb->transfer_buffer;
/*
* The packet size is 512,
* last packet contains 456 bytes tsp data
*/
for (offset = 456; offset < len; offset += 512) {
if (!strncmp(buf + offset, "DVHS", 4)) {
dvb_dmx_swfilter(demux, buf, offset);
if (len > offset + 52 + 4) {
/*16 bytes trailer + 36 bytes padding */
buf += offset + 52;
len -= offset + 52 + 4;
dvb_dmx_swfilter(demux, buf, len);
}
break;
}
}
}
resend:
ret = usb_submit_urb(urb, GFP_ATOMIC);
if (ret)
log(" usb_submit_urb failed: error %d", ret);
}
static int dvb_urb_init(struct pd_dvb_adapter *pd_dvb)
{
if (pd_dvb->urb_array[0])
return 0;
alloc_bulk_urbs_generic(pd_dvb->urb_array, DVB_SBUF_NUM,
pd_dvb->pd_device->udev, pd_dvb->ep_addr,
DVB_URB_BUF_SIZE, GFP_KERNEL,
dvb_urb_irq, pd_dvb);
return 0;
}
static void dvb_urb_cleanup(struct pd_dvb_adapter *pd_dvb)
{
free_all_urb_generic(pd_dvb->urb_array, DVB_SBUF_NUM);
}
static s32 dvb_start_streaming(struct pd_dvb_adapter *pd_dvb)
{
struct poseidon *pd = pd_dvb->pd_device;
int ret = 0;
if (pd->state & POSEIDON_STATE_DISCONNECT)
return -ENODEV;
mutex_lock(&pd->lock);
if (!pd_dvb->is_streaming) {
s32 i, cmd_status = 0;
/*
* Once upon a time, there was a difficult bug lying here.
* ret = send_set_req(pd, TAKE_REQUEST, 0, &cmd_status);
*/
ret = send_set_req(pd, PLAY_SERVICE, 1, &cmd_status);
if (ret | cmd_status)
goto out;
ret = dvb_urb_init(pd_dvb);
if (ret < 0)
goto out;
pd_dvb->is_streaming = 1;
for (i = 0; i < DVB_SBUF_NUM; i++) {
ret = usb_submit_urb(pd_dvb->urb_array[i],
GFP_KERNEL);
if (ret) {
log(" submit urb error %d", ret);
goto out;
}
}
}
out:
mutex_unlock(&pd->lock);
return ret;
}
void dvb_stop_streaming(struct pd_dvb_adapter *pd_dvb)
{
struct poseidon *pd = pd_dvb->pd_device;
mutex_lock(&pd->lock);
if (pd_dvb->is_streaming) {
s32 i, ret, cmd_status = 0;
pd_dvb->is_streaming = 0;
for (i = 0; i < DVB_SBUF_NUM; i++)
if (pd_dvb->urb_array[i])
usb_kill_urb(pd_dvb->urb_array[i]);
ret = send_set_req(pd, PLAY_SERVICE, TLG_TUNE_PLAY_SVC_STOP,
&cmd_status);
if (ret | cmd_status)
log("error");
}
mutex_unlock(&pd->lock);
}
static int pd_start_feed(struct dvb_demux_feed *feed)
{
struct pd_dvb_adapter *pd_dvb = feed->demux->priv;
int ret = 0;
if (!pd_dvb)
return -1;
if (atomic_inc_return(&pd_dvb->active_feed) == 1)
ret = dvb_start_streaming(pd_dvb);
return ret;
}
static int pd_stop_feed(struct dvb_demux_feed *feed)
{
struct pd_dvb_adapter *pd_dvb = feed->demux->priv;
if (!pd_dvb)
return -1;
if (atomic_dec_and_test(&pd_dvb->active_feed))
dvb_stop_streaming(pd_dvb);
return 0;
}
DVB_DEFINE_MOD_OPT_ADAPTER_NR(adapter_nr);
int pd_dvb_usb_device_init(struct poseidon *pd)
{
struct pd_dvb_adapter *pd_dvb = &pd->dvb_data;
struct dvb_demux *dvbdemux;
int ret = 0;
pd_dvb->ep_addr = 0x82;
atomic_set(&pd_dvb->users, 0);
atomic_set(&pd_dvb->active_feed, 0);
pd_dvb->pd_device = pd;
ret = dvb_register_adapter(&pd_dvb->dvb_adap,
"Poseidon dvbt adapter",
THIS_MODULE,
NULL /* for hibernation correctly*/,
adapter_nr);
if (ret < 0)
goto error1;
/* register frontend */
pd_dvb->dvb_fe.demodulator_priv = pd;
memcpy(&pd_dvb->dvb_fe.ops, &poseidon_frontend_ops,
sizeof(struct dvb_frontend_ops));
ret = dvb_register_frontend(&pd_dvb->dvb_adap, &pd_dvb->dvb_fe);
if (ret < 0)
goto error2;
/* register demux device */
dvbdemux = &pd_dvb->demux;
dvbdemux->dmx.capabilities = DMX_TS_FILTERING | DMX_SECTION_FILTERING;
dvbdemux->priv = pd_dvb;
dvbdemux->feednum = dvbdemux->filternum = 64;
dvbdemux->start_feed = pd_start_feed;
dvbdemux->stop_feed = pd_stop_feed;
dvbdemux->write_to_decoder = NULL;
ret = dvb_dmx_init(dvbdemux);
if (ret < 0)
goto error3;
pd_dvb->dmxdev.filternum = pd_dvb->demux.filternum;
pd_dvb->dmxdev.demux = &pd_dvb->demux.dmx;
pd_dvb->dmxdev.capabilities = 0;
ret = dvb_dmxdev_init(&pd_dvb->dmxdev, &pd_dvb->dvb_adap);
if (ret < 0)
goto error3;
return 0;
error3:
dvb_unregister_frontend(&pd_dvb->dvb_fe);
error2:
dvb_unregister_adapter(&pd_dvb->dvb_adap);
error1:
return ret;
}
void pd_dvb_usb_device_exit(struct poseidon *pd)
{
struct pd_dvb_adapter *pd_dvb = &pd->dvb_data;
while (atomic_read(&pd_dvb->users) != 0
|| atomic_read(&pd_dvb->active_feed) != 0) {
set_current_state(TASK_INTERRUPTIBLE);
schedule_timeout(HZ);
}
dvb_dmxdev_release(&pd_dvb->dmxdev);
dvb_unregister_frontend(&pd_dvb->dvb_fe);
dvb_unregister_adapter(&pd_dvb->dvb_adap);
pd_dvb_usb_device_cleanup(pd);
}
void pd_dvb_usb_device_cleanup(struct poseidon *pd)
{
struct pd_dvb_adapter *pd_dvb = &pd->dvb_data;
dvb_urb_cleanup(pd_dvb);
}
int pd_dvb_get_adapter_num(struct pd_dvb_adapter *pd_dvb)
{
return pd_dvb->dvb_adap.num;
}