#include "pvrusb2-ioread.h"
#include "pvrusb2-hdw.h"
#include "pvrusb2-debug.h"
+#include <linux/kthread.h>
#include <linux/errno.h>
#include <linux/string.h>
#include <linux/slab.h>
static void pvr2_context_destroy(struct pvr2_context *mp)
{
- pvr2_trace(PVR2_TRACE_STRUCT,"Destroying pvr_main id=%p",mp);
+ pvr2_trace(PVR2_TRACE_CTXT,"pvr2_context %p (destroy)",mp);
if (mp->hdw) pvr2_hdw_destroy(mp->hdw);
kfree(mp);
}
-static void pvr2_context_state_check(struct pvr2_context *mp)
+static void pvr2_context_notify(struct pvr2_context *mp)
{
- if (mp->init_flag) return;
-
- switch (pvr2_hdw_get_state(mp->hdw)) {
- case PVR2_STATE_WARM: break;
- case PVR2_STATE_ERROR: break;
- case PVR2_STATE_READY: break;
- case PVR2_STATE_RUN: break;
- default: return;
+ mp->notify_flag = !0;
+ wake_up(&mp->wait_data);
+}
+
+
+static int pvr2_context_thread(void *_mp)
+{
+ struct pvr2_channel *ch1,*ch2;
+ struct pvr2_context *mp = _mp;
+ pvr2_trace(PVR2_TRACE_CTXT,"pvr2_context %p (thread start)",mp);
+
+ /* Finish hardware initialization */
+ if (pvr2_hdw_initialize(mp->hdw,
+ (void (*)(void *))pvr2_context_notify,mp)) {
+ mp->video_stream.stream =
+ pvr2_hdw_get_video_stream(mp->hdw);
+ /* Trigger interface initialization. By doing this here
+ initialization runs in our own safe and cozy thread
+ context. */
+ if (mp->setup_func) mp->setup_func(mp);
+ } else {
+ pvr2_trace(PVR2_TRACE_CTXT,
+ "pvr2_context %p (thread skipping setup)",mp);
+ /* Even though initialization did not succeed, we're still
+ going to enter the wait loop anyway. We need to do this
+ in order to await the expected disconnect (which we will
+ detect in the normal course of operation). */
}
- pvr2_context_enter(mp); do {
- mp->init_flag = !0;
- mp->video_stream.stream = pvr2_hdw_get_video_stream(mp->hdw);
- if (mp->setup_func) {
- mp->setup_func(mp);
+ /* Now just issue callbacks whenever hardware state changes or if
+ there is a disconnect. If there is a disconnect and there are
+ no channels left, then there's no reason to stick around anymore
+ so we'll self-destruct - tearing down the rest of this driver
+ instance along the way. */
+ pvr2_trace(PVR2_TRACE_CTXT,"pvr2_context %p (thread enter loop)",mp);
+ while (!mp->disconnect_flag || mp->mc_first) {
+ if (mp->notify_flag) {
+ mp->notify_flag = 0;
+ pvr2_trace(PVR2_TRACE_CTXT,
+ "pvr2_context %p (thread notify)",mp);
+ for (ch1 = mp->mc_first; ch1; ch1 = ch2) {
+ ch2 = ch1->mc_next;
+ if (ch1->check_func) ch1->check_func(ch1);
+ }
}
- } while (0); pvr2_context_exit(mp);
- }
+ wait_event_interruptible(mp->wait_data, mp->notify_flag);
+ }
+ pvr2_trace(PVR2_TRACE_CTXT,"pvr2_context %p (thread end)",mp);
+ pvr2_context_destroy(mp);
+ return 0;
+}
struct pvr2_context *pvr2_context_create(
const struct usb_device_id *devid,
void (*setup_func)(struct pvr2_context *))
{
+ struct task_struct *thread;
struct pvr2_context *mp = NULL;
mp = kzalloc(sizeof(*mp),GFP_KERNEL);
if (!mp) goto done;
- pvr2_trace(PVR2_TRACE_STRUCT,"Creating pvr_main id=%p",mp);
+ pvr2_trace(PVR2_TRACE_CTXT,"pvr2_context %p (create)",mp);
+ init_waitqueue_head(&mp->wait_data);
mp->setup_func = setup_func;
mutex_init(&mp->mutex);
mp->hdw = pvr2_hdw_create(intf,devid);
mp = NULL;
goto done;
}
- pvr2_hdw_initialize(mp->hdw,
- (void (*)(void *))pvr2_context_state_check,
- mp);
+ thread = kthread_run(pvr2_context_thread, mp, "pvrusb2-context");
+ if (!thread) {
+ pvr2_context_destroy(mp);
+ mp = NULL;
+ goto done;
+ }
done:
return mp;
}
-void pvr2_context_enter(struct pvr2_context *mp)
+static void pvr2_context_enter(struct pvr2_context *mp)
{
mutex_lock(&mp->mutex);
- pvr2_trace(PVR2_TRACE_CREG,"pvr2_context_enter(id=%p)",mp);
}
-void pvr2_context_exit(struct pvr2_context *mp)
+static void pvr2_context_exit(struct pvr2_context *mp)
{
int destroy_flag = 0;
if (!(mp->mc_first || !mp->disconnect_flag)) {
destroy_flag = !0;
}
- pvr2_trace(PVR2_TRACE_CREG,"pvr2_context_exit(id=%p) outside",mp);
mutex_unlock(&mp->mutex);
- if (destroy_flag) pvr2_context_destroy(mp);
-}
-
-
-static void pvr2_context_run_checks(struct pvr2_context *mp)
-{
- struct pvr2_channel *ch1,*ch2;
- for (ch1 = mp->mc_first; ch1; ch1 = ch2) {
- ch2 = ch1->mc_next;
- if (ch1->check_func) {
- ch1->check_func(ch1);
- }
- }
+ if (destroy_flag) pvr2_context_notify(mp);
}
void pvr2_context_disconnect(struct pvr2_context *mp)
{
- pvr2_context_enter(mp); do {
- pvr2_hdw_disconnect(mp->hdw);
- mp->disconnect_flag = !0;
- pvr2_context_run_checks(mp);
- } while (0); pvr2_context_exit(mp);
+ pvr2_hdw_disconnect(mp->hdw);
+ mp->disconnect_flag = !0;
+ pvr2_context_notify(mp);
}
void pvr2_channel_init(struct pvr2_channel *cp,struct pvr2_context *mp)
{
+ pvr2_context_enter(mp);
cp->hdw = mp->hdw;
cp->mc_head = mp;
cp->mc_next = NULL;
mp->mc_first = cp;
}
mp->mc_last = cp;
+ pvr2_context_exit(mp);
}
void pvr2_channel_done(struct pvr2_channel *cp)
{
struct pvr2_context *mp = cp->mc_head;
+ pvr2_context_enter(mp);
pvr2_channel_disclaim_stream(cp);
if (cp->mc_next) {
cp->mc_next->mc_prev = cp->mc_prev;
mp->mc_first = cp->mc_next;
}
cp->hdw = NULL;
+ pvr2_context_exit(mp);
}
struct pvr2_hdw *hdw;
struct pvr2_context_stream video_stream;
struct mutex mutex;
+ int notify_flag;
int disconnect_flag;
- int init_flag;
+
+ wait_queue_head_t wait_data;
/* Called after pvr2_context initialization is complete */
void (*setup_func)(struct pvr2_context *);
void (*check_func)(struct pvr2_channel *);
};
-void pvr2_context_enter(struct pvr2_context *);
-void pvr2_context_exit(struct pvr2_context *);
-
struct pvr2_context *pvr2_context_create(struct usb_interface *intf,
const struct usb_device_id *devid,
void (*setup_func)(struct pvr2_context *));
#define PVR2_TRACE_EEPROM (1 << 10) /* eeprom parsing / report */
#define PVR2_TRACE_STRUCT (1 << 11) /* internal struct creation */
#define PVR2_TRACE_OPEN_CLOSE (1 << 12) /* application open / close */
-#define PVR2_TRACE_CREG (1 << 13) /* Main critical region entry / exit */
+#define PVR2_TRACE_CTXT (1 << 13) /* Main context tracking */
#define PVR2_TRACE_SYSFS (1 << 14) /* Sysfs driven I/O */
#define PVR2_TRACE_FIRMWARE (1 << 15) /* firmware upload actions */
#define PVR2_TRACE_CHIPS (1 << 16) /* chip broadcast operation */
struct workqueue_struct *workqueue;
struct work_struct workpoll; /* Update driver state */
struct work_struct worki2csync; /* Update i2c clients */
- struct work_struct workinit; /* Driver initialization sequence */
/* Video spigot */
struct pvr2_stream *vid_stream;
static void pvr2_hdw_set_cur_freq(struct pvr2_hdw *,unsigned long);
static void pvr2_hdw_worker_i2c(struct work_struct *work);
static void pvr2_hdw_worker_poll(struct work_struct *work);
-static void pvr2_hdw_worker_init(struct work_struct *work);
static int pvr2_hdw_wait(struct pvr2_hdw *,int state);
static int pvr2_hdw_untrip_unlocked(struct pvr2_hdw *);
static void pvr2_hdw_state_log_state(struct pvr2_hdw *);
/* Perform second stage initialization. Set callback pointer first so that
we can avoid a possible initialization race (if the kernel thread runs
before the callback has been set). */
-void pvr2_hdw_initialize(struct pvr2_hdw *hdw,
- void (*callback_func)(void *),
- void *callback_data)
+int pvr2_hdw_initialize(struct pvr2_hdw *hdw,
+ void (*callback_func)(void *),
+ void *callback_data)
{
LOCK_TAKE(hdw->big_lock); do {
hdw->state_data = callback_data;
hdw->state_func = callback_func;
} while (0); LOCK_GIVE(hdw->big_lock);
- queue_work(hdw->workqueue,&hdw->workinit);
+ pvr2_hdw_setup(hdw);
+ return hdw->flag_init_ok;
}
hdw->workqueue = create_singlethread_workqueue(hdw->name);
INIT_WORK(&hdw->workpoll,pvr2_hdw_worker_poll);
INIT_WORK(&hdw->worki2csync,pvr2_hdw_worker_i2c);
- INIT_WORK(&hdw->workinit,pvr2_hdw_worker_init);
pvr2_trace(PVR2_TRACE_INIT,"Driver unit number is %d, name is %s",
hdw->unit_number,hdw->name);
}
-static void pvr2_hdw_worker_init(struct work_struct *work)
-{
- struct pvr2_hdw *hdw = container_of(work,struct pvr2_hdw,workinit);
- LOCK_TAKE(hdw->big_lock); do {
- pvr2_hdw_setup(hdw);
- } while (0); LOCK_GIVE(hdw->big_lock);
-}
-
-
static int pvr2_hdw_wait(struct pvr2_hdw *hdw,int state)
{
return wait_event_interruptible(
/* Perform second stage initialization, passing in a notification callback
for when the master state changes. */
-void pvr2_hdw_initialize(struct pvr2_hdw *,
- void (*callback_func)(void *),
- void *callback_data);
+int pvr2_hdw_initialize(struct pvr2_hdw *,
+ void (*callback_func)(void *),
+ void *callback_data);
/* Destroy hardware interaction structure */
void pvr2_hdw_destroy(struct pvr2_hdw *);
{
struct pvr2_v4l2_fh *fhp = file->private_data;
struct pvr2_v4l2 *vp = fhp->vhead;
- struct pvr2_context *mp = fhp->vhead->channel.mc_head;
struct pvr2_hdw *hdw = fhp->channel.mc_head->hdw;
pvr2_trace(PVR2_TRACE_OPEN_CLOSE,"pvr2_v4l2_release");
v4l2_prio_close(&vp->prio, &fhp->prio);
file->private_data = NULL;
- pvr2_context_enter(mp); do {
- /* Restore the previous input selection, if it makes sense
- to do so. */
- if (fhp->dev_info->v4l_type == VFL_TYPE_RADIO) {
- struct pvr2_ctrl *cp;
- int pval;
- cp = pvr2_hdw_get_ctrl_by_id(hdw,PVR2_CID_INPUT);
- pvr2_ctrl_get_value(cp,&pval);
- /* Only restore if we're still selecting the radio */
- if (pval == PVR2_CVAL_INPUT_RADIO) {
- pvr2_ctrl_set_value(cp,fhp->prev_input_val);
- pvr2_hdw_commit_ctl(hdw);
- }
+ /* Restore the previous input selection, if it makes sense
+ to do so. */
+ if (fhp->dev_info->v4l_type == VFL_TYPE_RADIO) {
+ struct pvr2_ctrl *cp;
+ int pval;
+ cp = pvr2_hdw_get_ctrl_by_id(hdw,PVR2_CID_INPUT);
+ pvr2_ctrl_get_value(cp,&pval);
+ /* Only restore if we're still selecting the radio */
+ if (pval == PVR2_CVAL_INPUT_RADIO) {
+ pvr2_ctrl_set_value(cp,fhp->prev_input_val);
+ pvr2_hdw_commit_ctl(hdw);
}
+ }
- if (fhp->vnext) {
- fhp->vnext->vprev = fhp->vprev;
- } else {
- vp->vlast = fhp->vprev;
- }
- if (fhp->vprev) {
- fhp->vprev->vnext = fhp->vnext;
- } else {
- vp->vfirst = fhp->vnext;
- }
- fhp->vnext = NULL;
- fhp->vprev = NULL;
- fhp->vhead = NULL;
- pvr2_channel_done(&fhp->channel);
- pvr2_trace(PVR2_TRACE_STRUCT,
- "Destroying pvr_v4l2_fh id=%p",fhp);
- kfree(fhp);
- if (vp->channel.mc_head->disconnect_flag && !vp->vfirst) {
- pvr2_v4l2_destroy_no_lock(vp);
- }
- } while (0); pvr2_context_exit(mp);
+ if (fhp->vnext) {
+ fhp->vnext->vprev = fhp->vprev;
+ } else {
+ vp->vlast = fhp->vprev;
+ }
+ if (fhp->vprev) {
+ fhp->vprev->vnext = fhp->vnext;
+ } else {
+ vp->vfirst = fhp->vnext;
+ }
+ fhp->vnext = NULL;
+ fhp->vprev = NULL;
+ fhp->vhead = NULL;
+ pvr2_channel_done(&fhp->channel);
+ pvr2_trace(PVR2_TRACE_STRUCT,
+ "Destroying pvr_v4l2_fh id=%p",fhp);
+ kfree(fhp);
+ if (vp->channel.mc_head->disconnect_flag && !vp->vfirst) {
+ pvr2_v4l2_destroy_no_lock(vp);
+ }
return 0;
}
init_waitqueue_head(&fhp->wait_data);
fhp->dev_info = dip;
- pvr2_context_enter(vp->channel.mc_head); do {
- pvr2_trace(PVR2_TRACE_STRUCT,"Creating pvr_v4l2_fh id=%p",fhp);
- pvr2_channel_init(&fhp->channel,vp->channel.mc_head);
+ pvr2_trace(PVR2_TRACE_STRUCT,"Creating pvr_v4l2_fh id=%p",fhp);
+ pvr2_channel_init(&fhp->channel,vp->channel.mc_head);
- fhp->vnext = NULL;
- fhp->vprev = vp->vlast;
- if (vp->vlast) {
- vp->vlast->vnext = fhp;
- } else {
- vp->vfirst = fhp;
- }
- vp->vlast = fhp;
- fhp->vhead = vp;
-
- /* Opening the /dev/radioX device implies a mode switch.
- So execute that here. Note that you can get the
- IDENTICAL effect merely by opening the normal video
- device and setting the input appropriately. */
- if (dip->v4l_type == VFL_TYPE_RADIO) {
- struct pvr2_ctrl *cp;
- cp = pvr2_hdw_get_ctrl_by_id(hdw,PVR2_CID_INPUT);
- pvr2_ctrl_get_value(cp,&fhp->prev_input_val);
- pvr2_ctrl_set_value(cp,PVR2_CVAL_INPUT_RADIO);
- pvr2_hdw_commit_ctl(hdw);
- }
- } while (0); pvr2_context_exit(vp->channel.mc_head);
+ fhp->vnext = NULL;
+ fhp->vprev = vp->vlast;
+ if (vp->vlast) {
+ vp->vlast->vnext = fhp;
+ } else {
+ vp->vfirst = fhp;
+ }
+ vp->vlast = fhp;
+ fhp->vhead = vp;
+
+ /* Opening the /dev/radioX device implies a mode switch.
+ So execute that here. Note that you can get the
+ IDENTICAL effect merely by opening the normal video
+ device and setting the input appropriately. */
+ if (dip->v4l_type == VFL_TYPE_RADIO) {
+ struct pvr2_ctrl *cp;
+ cp = pvr2_hdw_get_ctrl_by_id(hdw,PVR2_CID_INPUT);
+ pvr2_ctrl_get_value(cp,&fhp->prev_input_val);
+ pvr2_ctrl_set_value(cp,PVR2_CVAL_INPUT_RADIO);
+ pvr2_hdw_commit_ctl(hdw);
+ }
fhp->file = file;
file->private_data = fhp;
projects / linux-2.6 / commitdiff