Release 4.11 drivers/media/usb/pvrusb2/pvrusb2-ctrl.c

Directory: drivers/media/usb/pvrusb2
/*
 *
 *
 *  Copyright (C) 2005 Mike Isely <isely@pobox.com>
 *
 *  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
 *
 *  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.
 *
 */

#include "pvrusb2-ctrl.h"
#include "pvrusb2-hdw-internal.h"
#include <linux/errno.h>
#include <linux/string.h>
#include <linux/mutex.h>




static int pvr2_ctrl_range_check(struct pvr2_ctrl *cptr,int val)
{
	if (cptr->info->check_value) {
		if (!cptr->info->check_value(cptr,val)) return -ERANGE;
	} else if (cptr->info->type == pvr2_ctl_enum) {
		if (val < 0) return -ERANGE;
		if (val >= cptr->info->def.type_enum.count) return -ERANGE;
	} else {
		int lim;
		lim = cptr->info->def.type_int.min_value;
		if (cptr->info->get_min_value) {
			cptr->info->get_min_value(cptr,&lim);
		}
		if (val < lim) return -ERANGE;
		lim = cptr->info->def.type_int.max_value;
		if (cptr->info->get_max_value) {
			cptr->info->get_max_value(cptr,&lim);
		}
		if (val > lim) return -ERANGE;
	}
	return 0;
}


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Mike Isely 180 100.00% 2 100.00%
Total 180 100.00% 2 100.00%

/* Set the given control. */


int pvr2_ctrl_set_value(struct pvr2_ctrl *cptr,int val)
{
	return pvr2_ctrl_set_mask_value(cptr,~0,val);
}


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Mike Isely 24 100.00% 1 100.00%
Total 24 100.00% 1 100.00%

/* Set/clear specific bits of the given control. */


int pvr2_ctrl_set_mask_value(struct pvr2_ctrl *cptr,int mask,int val)
{
	int ret = 0;
	if (!cptr) return -EINVAL;
	LOCK_TAKE(cptr->hdw->big_lock); do {
		if (cptr->info->set_value) {
			if (cptr->info->type == pvr2_ctl_bitmask) {
				mask &= cptr->info->def.type_bitmask.valid_bits;
			} else if ((cptr->info->type == pvr2_ctl_int)||
				   (cptr->info->type == pvr2_ctl_enum)) {
				ret = pvr2_ctrl_range_check(cptr,val);
				if (ret < 0) break;
			} else if (cptr->info->type != pvr2_ctl_bool) {
				break;
			}
			ret = cptr->info->set_value(cptr,mask,val);
		} else {
			ret = -EPERM;
		}
	} while(0); LOCK_GIVE(cptr->hdw->big_lock);
	return ret;
}


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Mike Isely 171 100.00% 5 100.00%
Total 171 100.00% 5 100.00%

/* Get the current value of the given control. */


int pvr2_ctrl_get_value(struct pvr2_ctrl *cptr,int *valptr)
{
	int ret = 0;
	if (!cptr) return -EINVAL;
	LOCK_TAKE(cptr->hdw->big_lock); do {
		ret = cptr->info->get_value(cptr,valptr);
	} while(0); LOCK_GIVE(cptr->hdw->big_lock);
	return ret;
}


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Mike Isely 70 100.00% 1 100.00%
Total 70 100.00% 1 100.00%

/* Retrieve control's type */


enum pvr2_ctl_type pvr2_ctrl_get_type(struct pvr2_ctrl *cptr)
{
	if (!cptr) return pvr2_ctl_int;
	return cptr->info->type;
}


Contributors
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Mike Isely 26 100.00% 1 100.00%
Total 26 100.00% 1 100.00%

/* Retrieve control's maximum value (int type) */


int pvr2_ctrl_get_max(struct pvr2_ctrl *cptr)
{
	int ret = 0;
	if (!cptr) return 0;
	LOCK_TAKE(cptr->hdw->big_lock); do {
		if (cptr->info->get_max_value) {
			cptr->info->get_max_value(cptr,&ret);
		} else if (cptr->info->type == pvr2_ctl_int) {
			ret = cptr->info->def.type_int.max_value;
		}
	} while(0); LOCK_GIVE(cptr->hdw->big_lock);
	return ret;
}


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Mike Isely 99 100.00% 2 100.00%
Total 99 100.00% 2 100.00%

/* Retrieve control's minimum value (int type) */


int pvr2_ctrl_get_min(struct pvr2_ctrl *cptr)
{
	int ret = 0;
	if (!cptr) return 0;
	LOCK_TAKE(cptr->hdw->big_lock); do {
		if (cptr->info->get_min_value) {
			cptr->info->get_min_value(cptr,&ret);
		} else if (cptr->info->type == pvr2_ctl_int) {
			ret = cptr->info->def.type_int.min_value;
		}
	} while(0); LOCK_GIVE(cptr->hdw->big_lock);
	return ret;
}


Contributors
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Mike Isely 99 100.00% 2 100.00%
Total 99 100.00% 2 100.00%

/* Retrieve control's default value (any type) */


int pvr2_ctrl_get_def(struct pvr2_ctrl *cptr, int *valptr)
{
	int ret = 0;
	if (!cptr) return -EINVAL;
	LOCK_TAKE(cptr->hdw->big_lock); do {
		if (cptr->info->get_def_value) {
			ret = cptr->info->get_def_value(cptr, valptr);
		} else {
			*valptr = cptr->info->default_value;
		}
	} while(0); LOCK_GIVE(cptr->hdw->big_lock);
	return ret;
}


Contributors
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Mike Isely 92 100.00% 3 100.00%
Total 92 100.00% 3 100.00%

/* Retrieve control's enumeration count (enum only) */


int pvr2_ctrl_get_cnt(struct pvr2_ctrl *cptr)
{
	int ret = 0;
	if (!cptr) return 0;
	LOCK_TAKE(cptr->hdw->big_lock); do {
		if (cptr->info->type == pvr2_ctl_enum) {
			ret = cptr->info->def.type_enum.count;
		}
	} while(0); LOCK_GIVE(cptr->hdw->big_lock);
	return ret;
}


Contributors
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Mike Isely 76 100.00% 1 100.00%
Total 76 100.00% 1 100.00%

/* Retrieve control's valid mask bits (bit mask only) */


int pvr2_ctrl_get_mask(struct pvr2_ctrl *cptr)
{
	int ret = 0;
	if (!cptr) return 0;
	LOCK_TAKE(cptr->hdw->big_lock); do {
		if (cptr->info->type == pvr2_ctl_bitmask) {
			ret = cptr->info->def.type_bitmask.valid_bits;
		}
	} while(0); LOCK_GIVE(cptr->hdw->big_lock);
	return ret;
}


Contributors
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Mike Isely 76 100.00% 1 100.00%
Total 76 100.00% 1 100.00%

/* Retrieve the control's name */


const char *pvr2_ctrl_get_name(struct pvr2_ctrl *cptr)
{
	if (!cptr) return NULL;
	return cptr->info->name;
}


Contributors
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Mike Isely 27 100.00% 2 100.00%
Total 27 100.00% 2 100.00%

/* Retrieve the control's desc */


const char *pvr2_ctrl_get_desc(struct pvr2_ctrl *cptr)
{
	if (!cptr) return NULL;
	return cptr->info->desc;
}


Contributors
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Mike Isely 27 100.00% 2 100.00%
Total 27 100.00% 2 100.00%

/* Retrieve a control enumeration or bit mask value */


int pvr2_ctrl_get_valname(struct pvr2_ctrl *cptr,int val,
			  char *bptr,unsigned int bmax,
			  unsigned int *blen)
{
	int ret = -EINVAL;
	if (!cptr) return 0;
	*blen = 0;
	LOCK_TAKE(cptr->hdw->big_lock); do {
		if (cptr->info->type == pvr2_ctl_enum) {
			const char * const *names;
			names = cptr->info->def.type_enum.value_names;
			if (pvr2_ctrl_range_check(cptr,val) == 0) {
				if (names[val]) {
					*blen = scnprintf(
						bptr,bmax,"%s",
						names[val]);
				} else {
					*blen = 0;
				}
				ret = 0;
			}
		} else if (cptr->info->type == pvr2_ctl_bitmask) {
			const char **names;
			unsigned int idx;
			int msk;
			names = cptr->info->def.type_bitmask.bit_names;
			val &= cptr->info->def.type_bitmask.valid_bits;
			for (idx = 0, msk = 1; val; idx++, msk <<= 1) {
				if (val & msk) {
					*blen = scnprintf(bptr,bmax,"%s",
							  names[idx]);
					ret = 0;
					break;
				}
			}
		}
	} while(0); LOCK_GIVE(cptr->hdw->big_lock);
	return ret;
}


Contributors
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Mike Isely 256 99.61% 2 66.67%
Hans Verkuil 1 0.39% 1 33.33%
Total 257 100.00% 3 100.00%

/* Return V4L ID for this control or zero if none */


int pvr2_ctrl_get_v4lid(struct pvr2_ctrl *cptr)
{
	if (!cptr) return 0;
	return cptr->info->v4l_id;
}


Contributors
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Mike Isely 25 100.00% 1 100.00%
Total 25 100.00% 1 100.00%



unsigned int pvr2_ctrl_get_v4lflags(struct pvr2_ctrl *cptr)
{
	unsigned int flags = 0;

	if (cptr->info->get_v4lflags) {
		flags = cptr->info->get_v4lflags(cptr);
	}

	if (cptr->info->set_value) {
		flags &= ~V4L2_CTRL_FLAG_READ_ONLY;
	} else {
		flags |= V4L2_CTRL_FLAG_READ_ONLY;
	}

	return flags;
}


Contributors
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Mike Isely 63 100.00% 2 100.00%
Total 63 100.00% 2 100.00%

/* Return true if control is writable */


int pvr2_ctrl_is_writable(struct pvr2_ctrl *cptr)
{
	if (!cptr) return 0;
	return cptr->info->set_value != NULL;
}


Contributors
Person Tokens Prop Commits CommitProp
Mike Isely 26 96.30% 1 50.00%
Al Viro 1 3.70% 1 50.00%
Total 27 100.00% 2 100.00%

/* Return true if control has custom symbolic representation */


int pvr2_ctrl_has_custom_symbols(struct pvr2_ctrl *cptr)
{
	if (!cptr) return 0;
	if (!cptr->info->val_to_sym) return 0;
	if (!cptr->info->sym_to_val) return 0;
	return !0;
}


Contributors
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Mike Isely 46 100.00% 1 100.00%
Total 46 100.00% 1 100.00%

/* Convert a given mask/val to a custom symbolic value */


int pvr2_ctrl_custom_value_to_sym(struct pvr2_ctrl *cptr,
				  int mask,int val,
				  char *buf,unsigned int maxlen,
				  unsigned int *len)
{
	if (!cptr) return -EINVAL;
	if (!cptr->info->val_to_sym) return -EINVAL;
	return cptr->info->val_to_sym(cptr,mask,val,buf,maxlen,len);
}


Contributors
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Mike Isely 71 100.00% 1 100.00%
Total 71 100.00% 1 100.00%

/* Convert a symbolic value to a mask/value pair */


int pvr2_ctrl_custom_sym_to_value(struct pvr2_ctrl *cptr,
				  const char *buf,unsigned int len,
				  int *maskptr,int *valptr)
{
	if (!cptr) return -EINVAL;
	if (!cptr->info->sym_to_val) return -EINVAL;
	return cptr->info->sym_to_val(cptr,buf,len,maskptr,valptr);
}


Contributors
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Mike Isely 67 100.00% 1 100.00%
Total 67 100.00% 1 100.00%



static unsigned int gen_bitmask_string(int msk,int val,int msk_only,
				       const char **names,
				       char *ptr,unsigned int len)
{
	unsigned int idx;
	long sm,um;
	int spcFl;
	unsigned int uc,cnt;
	const char *idStr;

	spcFl = 0;
	uc = 0;
	um = 0;
	for (idx = 0, sm = 1; msk; idx++, sm <<= 1) {
		if (sm & msk) {
			msk &= ~sm;
			idStr = names[idx];
			if (idStr) {
				cnt = scnprintf(ptr,len,"%s%s%s",
						(spcFl ? " " : ""),
						(msk_only ? "" :
						 ((val & sm) ? "+" : "-")),
						idStr);
				ptr += cnt; len -= cnt; uc += cnt;
				spcFl = !0;
			} else {
				um |= sm;
			}
		}
	}
	if (um) {
		if (msk_only) {
			cnt = scnprintf(ptr,len,"%s0x%lx",
					(spcFl ? " " : ""),
					um);
			ptr += cnt; len -= cnt; uc += cnt;
			spcFl = !0;
		} else if (um & val) {
			cnt = scnprintf(ptr,len,"%s+0x%lx",
					(spcFl ? " " : ""),
					um & val);
			ptr += cnt; len -= cnt; uc += cnt;
			spcFl = !0;
		} else if (um & ~val) {
			cnt = scnprintf(ptr,len,"%s+0x%lx",
					(spcFl ? " " : ""),
					um & ~val);
			ptr += cnt; len -= cnt; uc += cnt;
			spcFl = !0;
		}
	}
	return uc;
}


Contributors
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Mike Isely 328 100.00% 1 100.00%
Total 328 100.00% 1 100.00%


static const char *boolNames[] = {
	"false",
	"true",
	"no",
	"yes",
};




static int parse_token(const char *ptr,unsigned int len,
		       int *valptr,
		       const char * const *names, unsigned int namecnt)
{
	char buf[33];
	unsigned int slen;
	unsigned int idx;
	int negfl;
	char *p2;
	*valptr = 0;
	if (!names) namecnt = 0;
	for (idx = 0; idx < namecnt; idx++) {
		if (!names[idx]) continue;
		slen = strlen(names[idx]);
		if (slen != len) continue;
		if (memcmp(names[idx],ptr,slen)) continue;
		*valptr = idx;
		return 0;
	}
	negfl = 0;
	if ((*ptr == '-') || (*ptr == '+')) {
		negfl = (*ptr == '-');
		ptr++; len--;
	}
	if (len >= sizeof(buf)) return -EINVAL;
	memcpy(buf,ptr,len);
	buf[len] = 0;
	*valptr = simple_strtol(buf,&p2,0);
	if (negfl) *valptr = -(*valptr);
	if (*p2) return -EINVAL;
	return 1;
}


Contributors
Person Tokens Prop Commits CommitProp
Mike Isely 232 99.57% 2 66.67%
Hans Verkuil 1 0.43% 1 33.33%
Total 233 100.00% 3 100.00%



static int parse_mtoken(const char *ptr,unsigned int len,
			int *valptr,
			const char **names,int valid_bits)
{
	char buf[33];
	unsigned int slen;
	unsigned int idx;
	char *p2;
	int msk;
	*valptr = 0;
	for (idx = 0, msk = 1; valid_bits; idx++, msk <<= 1) {
		if (!(msk & valid_bits)) continue;
		valid_bits &= ~msk;
		if (!names[idx]) continue;
		slen = strlen(names[idx]);
		if (slen != len) continue;
		if (memcmp(names[idx],ptr,slen)) continue;
		*valptr = msk;
		return 0;
	}
	if (len >= sizeof(buf)) return -EINVAL;
	memcpy(buf,ptr,len);
	buf[len] = 0;
	*valptr = simple_strtol(buf,&p2,0);
	if (*p2) return -EINVAL;
	return 0;
}


Contributors
Person Tokens Prop Commits CommitProp
Mike Isely 191 98.96% 1 50.00%
Roel Kluin 2 1.04% 1 50.00%
Total 193 100.00% 2 100.00%



static int parse_tlist(const char *ptr,unsigned int len,
		       int *maskptr,int *valptr,
		       const char **names,int valid_bits)
{
	unsigned int cnt;
	int mask,val,kv,mode,ret;
	mask = 0;
	val = 0;
	ret = 0;
	while (len) {
		cnt = 0;
		while ((cnt < len) &&
		       ((ptr[cnt] <= 32) ||
			(ptr[cnt] >= 127))) cnt++;
		ptr += cnt;
		len -= cnt;
		mode = 0;
		if ((*ptr == '-') || (*ptr == '+')) {
			mode = (*ptr == '-') ? -1 : 1;
			ptr++;
			len--;
		}
		cnt = 0;
		while (cnt < len) {
			if (ptr[cnt] <= 32) break;
			if (ptr[cnt] >= 127) break;
			cnt++;
		}
		if (!cnt) break;
		if (parse_mtoken(ptr,cnt,&kv,names,valid_bits)) {
			ret = -EINVAL;
			break;
		}
		ptr += cnt;
		len -= cnt;
		switch (mode) {
		case 0:
			mask = valid_bits;
			val |= kv;
			break;
		case -1:
			mask |= kv;
			val &= ~kv;
			break;
		case 1:
			mask |= kv;
			val |= kv;
			break;
		default:
			break;
		}
	}
	*maskptr = mask;
	*valptr = val;
	return ret;
}


Contributors
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Mike Isely 282 100.00% 1 100.00%
Total 282 100.00% 1 100.00%

/* Convert a symbolic value to a mask/value pair */


int pvr2_ctrl_sym_to_value(struct pvr2_ctrl *cptr,
			   const char *ptr,unsigned int len,
			   int *maskptr,int *valptr)
{
	int ret = -EINVAL;
	unsigned int cnt;

	*maskptr = 0;
	*valptr = 0;

	cnt = 0;
	while ((cnt < len) && ((ptr[cnt] <= 32) || (ptr[cnt] >= 127))) cnt++;
	len -= cnt; ptr += cnt;
	cnt = 0;
	while ((cnt < len) && ((ptr[len-(cnt+1)] <= 32) ||
			       (ptr[len-(cnt+1)] >= 127))) cnt++;
	len -= cnt;

	if (!len) return -EINVAL;

	LOCK_TAKE(cptr->hdw->big_lock); do {
		if (cptr->info->type == pvr2_ctl_int) {
			ret = parse_token(ptr,len,valptr,NULL,0);
			if (ret >= 0) {
				ret = pvr2_ctrl_range_check(cptr,*valptr);
			}
			*maskptr = ~0;
		} else if (cptr->info->type == pvr2_ctl_bool) {
			ret = parse_token(ptr,len,valptr,boolNames,
					  ARRAY_SIZE(boolNames));
			if (ret == 1) {
				*valptr = *valptr ? !0 : 0;
			} else if (ret == 0) {
				*valptr = (*valptr & 1) ? !0 : 0;
			}
			*maskptr = 1;
		} else if (cptr->info->type == pvr2_ctl_enum) {
			ret = parse_token(
				ptr,len,valptr,
				cptr->info->def.type_enum.value_names,
				cptr->info->def.type_enum.count);
			if (ret >= 0) {
				ret = pvr2_ctrl_range_check(cptr,*valptr);
			}
			*maskptr = ~0;
		} else if (cptr->info->type == pvr2_ctl_bitmask) {
			ret = parse_tlist(
				ptr,len,maskptr,valptr,
				cptr->info->def.type_bitmask.bit_names,
				cptr->info->def.type_bitmask.valid_bits);
		}
	} while(0); LOCK_GIVE(cptr->hdw->big_lock);
	return ret;
}


Contributors
Person Tokens Prop Commits CommitProp
Mike Isely 415 98.11% 6 85.71%
Pantelis Koukousoulas 8 1.89% 1 14.29%
Total 423 100.00% 7 100.00%

/* Convert a given mask/val to a symbolic value */


int pvr2_ctrl_value_to_sym_internal(struct pvr2_ctrl *cptr,
				    int mask,int val,
				    char *buf,unsigned int maxlen,
				    unsigned int *len)
{
	int ret = -EINVAL;

	*len = 0;
	if (cptr->info->type == pvr2_ctl_int) {
		*len = scnprintf(buf,maxlen,"%d",val);
		ret = 0;
	} else if (cptr->info->type == pvr2_ctl_bool) {
		*len = scnprintf(buf,maxlen,"%s",val ? "true" : "false");
		ret = 0;
	} else if (cptr->info->type == pvr2_ctl_enum) {
		const char * const *names;
		names = cptr->info->def.type_enum.value_names;
		if ((val >= 0) &&
		    (val < cptr->info->def.type_enum.count)) {
			if (names[val]) {
				*len = scnprintf(
					buf,maxlen,"%s",
					names[val]);
			} else {
				*len = 0;
			}
			ret = 0;
		}
	} else if (cptr->info->type == pvr2_ctl_bitmask) {
		*len = gen_bitmask_string(
			val & mask & cptr->info->def.type_bitmask.valid_bits,
			~0,!0,
			cptr->info->def.type_bitmask.bit_names,
			buf,maxlen);
	}
	return ret;
}


Contributors
Person Tokens Prop Commits CommitProp
Mike Isely 254 99.61% 2 66.67%
Hans Verkuil 1 0.39% 1 33.33%
Total 255 100.00% 3 100.00%

/* Convert a given mask/val to a symbolic value */


int pvr2_ctrl_value_to_sym(struct pvr2_ctrl *cptr,
			   int mask,int val,
			   char *buf,unsigned int maxlen,
			   unsigned int *len)
{
	int ret;
	LOCK_TAKE(cptr->hdw->big_lock); do {
		ret = pvr2_ctrl_value_to_sym_internal(cptr,mask,val,
						      buf,maxlen,len);
	} while(0); LOCK_GIVE(cptr->hdw->big_lock);
	return ret;
}
Contributors
Person Tokens Prop Commits CommitProp
Mike Isely 78 100.00% 1 100.00%
Total 78 100.00% 1 100.00%

Overall Contributors
Person Tokens Prop Commits CommitProp
Mike Isely 3353 99.55% 11 68.75%
Pantelis Koukousoulas 8 0.24% 1 6.25%
Hans Verkuil 3 0.09% 1 6.25%
Roel Kluin 2 0.06% 1 6.25%
Al Viro 1 0.03% 1 6.25%
Sakari Ailus 1 0.03% 1 6.25%
Total 3368 100.00% 16 100.00%
Directory: drivers/media/usb/pvrusb2

Information contained on this website is for historical information purposes only and does not indicate or represent copyright ownership.
Created with cregit.
Person	Tokens	Prop	Commits	CommitProp
Mike Isely	180	100.00%	2	100.00%
Total	180	100.00%	2	100.00%
cregit-Linux how code gets into the kernel

Release 4.11 drivers/media/usb/pvrusb2/pvrusb2-ctrl.c

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