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

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#include "pd-common.h"
#include <linux/kernel.h>
#include <linux/usb.h>
#include <linux/time.h>
#include <linux/dvb/dmx.h>
#include <linux/delay.h>
include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h percpu.h is included by sched.h and module.h and thus ends up being included when building most .c files. percpu.h includes slab.h which in turn includes gfp.h making everything defined by the two files universally available and complicating inclusion dependencies. percpu.h -> slab.h dependency is about to be removed. Prepare for this change by updating users of gfp and slab facilities include those headers directly instead of assuming availability. As this conversion needs to touch large number of source files, the following script is used as the basis of conversion. http://userweb.kernel.org/~tj/misc/slabh-sweep.py The script does the followings. * Scan files for gfp and slab usages and update includes such that only the necessary includes are there. ie. if only gfp is used, gfp.h, if slab is used, slab.h. * When the script inserts a new include, it looks at the include blocks and try to put the new include such that its order conforms to its surrounding. It's put in the include block which contains core kernel includes, in the same order that the rest are ordered - alphabetical, Christmas tree, rev-Xmas-tree or at the end if there doesn't seem to be any matching order. * If the script can't find a place to put a new include (mostly because the file doesn't have fitting include block), it prints out an error message indicating which .h file needs to be added to the file. The conversion was done in the following steps. 1. The initial automatic conversion of all .c files updated slightly over 4000 files, deleting around 700 includes and adding ~480 gfp.h and ~3000 slab.h inclusions. The script emitted errors for ~400 files. 2. Each error was manually checked. Some didn't need the inclusion, some needed manual addition while adding it to implementation .h or embedding .c file was more appropriate for others. This step added inclusions to around 150 files. 3. The script was run again and the output was compared to the edits from #2 to make sure no file was left behind. 4. Several build tests were done and a couple of problems were fixed. e.g. lib/decompress_*.c used malloc/free() wrappers around slab APIs requiring slab.h to be added manually. 5. The script was run on all .h files but without automatically editing them as sprinkling gfp.h and slab.h inclusions around .h files could easily lead to inclusion dependency hell. Most gfp.h inclusion directives were ignored as stuff from gfp.h was usually wildly available and often used in preprocessor macros. Each slab.h inclusion directive was examined and added manually as necessary. 6. percpu.h was updated not to include slab.h. 7. Build test were done on the following configurations and failures were fixed. CONFIG_GCOV_KERNEL was turned off for all tests (as my distributed build env didn't work with gcov compiles) and a few more options had to be turned off depending on archs to make things build (like ipr on powerpc/64 which failed due to missing writeq). * x86 and x86_64 UP and SMP allmodconfig and a custom test config. * powerpc and powerpc64 SMP allmodconfig * sparc and sparc64 SMP allmodconfig * ia64 SMP allmodconfig * s390 SMP allmodconfig * alpha SMP allmodconfig * um on x86_64 SMP allmodconfig 8. percpu.h modifications were reverted so that it could be applied as a separate patch and serve as bisection point. Given the fact that I had only a couple of failures from tests on step 6, I'm fairly confident about the coverage of this conversion patch. If there is a breakage, it's likely to be something in one of the arch headers which should be easily discoverable easily on most builds of the specific arch. Signed-off-by: Tejun Heo <tj@kernel.org> Guess-its-ok-by: Christoph Lameter <cl@linux-foundation.org> Cc: Ingo Molnar <mingo@redhat.com> Cc: Lee Schermerhorn <Lee.Schermerhorn@hp.com>
2010-03-24 16:04:11 +08:00
#include <linux/gfp.h>
#include "vendorcmds.h"
#include <linux/sched.h>
#include <linux/atomic.h>
static void dvb_urb_cleanup(struct pd_dvb_adapter *pd_dvb);
static int dvb_bandwidth[][2] = {
{ TLG_BW_8, 8000000 },
{ TLG_BW_7, 7000000 },
{ TLG_BW_6, 6000000 }
};
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 dtv_frontend_properties *fep = &fe->dtv_property_cache;
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->bandwidth_hz == 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);
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 dtv_frontend_properties));
return 0;
}
static int poseidon_get_fe(struct dvb_frontend *fe)
{
struct dtv_frontend_properties *fep = &fe->dtv_property_cache;
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 = {
.delsys = { SYS_DVBT },
.info = {
.name = "Poseidon DVB-T",
.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;
}