65 int can_calc_bittiming(struct net_device *dev, struct can_bittiming *bt,  in can_calc_bittiming()  argument
81 	if (bt->sample_point) {  in can_calc_bittiming()
82 		sample_point_nominal = bt->sample_point;  in can_calc_bittiming()
84 		if (bt->bitrate > 800 * CAN_KBPS)  in can_calc_bittiming()
86 		else if (bt->bitrate > 500 * CAN_KBPS)  in can_calc_bittiming()
98 		brp = priv->clock.freq / (tsegall * bt->bitrate) + tseg % 2;  in can_calc_bittiming()
106 		bitrate_error = abs(bt->bitrate - bitrate);  in can_calc_bittiming()
133 		do_div(v64, bt->bitrate);  in can_calc_bittiming()
146 	bt->sample_point = can_update_sample_point(btc, sample_point_nominal,  in can_calc_bittiming()
152 	bt->tq = (u32)v64;  in can_calc_bittiming()
153 	bt->prop_seg = tseg1 / 2;  in can_calc_bittiming()
154 	bt->phase_seg1 = tseg1 - bt->prop_seg;  in can_calc_bittiming()
155 	bt->phase_seg2 = tseg2;  in can_calc_bittiming()
158 	if (!bt->sjw || !btc->sjw_max) {  in can_calc_bittiming()
159 		bt->sjw = 1;  in can_calc_bittiming()
161 		/* bt->sjw is at least 1 -> sanitize upper bound to sjw_max */  in can_calc_bittiming()
162 		if (bt->sjw > btc->sjw_max)  in can_calc_bittiming()
163 			bt->sjw = btc->sjw_max;  in can_calc_bittiming()
164 		/* bt->sjw must not be higher than tseg2 */  in can_calc_bittiming()
165 		if (tseg2 < bt->sjw)  in can_calc_bittiming()
166 			bt->sjw = tseg2;  in can_calc_bittiming()
169 	bt->brp = best_brp;  in can_calc_bittiming()
172 	bt->bitrate = priv->clock.freq /  in can_calc_bittiming()
173 		(bt->brp * (CAN_SYNC_SEG + tseg1 + tseg2));  in can_calc_bittiming()
208 static int can_fixup_bittiming(struct net_device *dev, struct can_bittiming *bt,  in can_fixup_bittiming()  argument
215 	tseg1 = bt->prop_seg + bt->phase_seg1;  in can_fixup_bittiming()
216 	if (!bt->sjw)  in can_fixup_bittiming()
217 		bt->sjw = 1;  in can_fixup_bittiming()
218 	if (bt->sjw > btc->sjw_max ||  in can_fixup_bittiming()
220 	    bt->phase_seg2 < btc->tseg2_min || bt->phase_seg2 > btc->tseg2_max)  in can_fixup_bittiming()
223 	brp64 = (u64)priv->clock.freq * (u64)bt->tq;  in can_fixup_bittiming()
230 	bt->brp = (u32)brp64;  in can_fixup_bittiming()
232 	if (bt->brp < btc->brp_min || bt->brp > btc->brp_max)  in can_fixup_bittiming()
235 	alltseg = bt->prop_seg + bt->phase_seg1 + bt->phase_seg2 + 1;  in can_fixup_bittiming()
236 	bt->bitrate = priv->clock.freq / (bt->brp * alltseg);  in can_fixup_bittiming()
237 	bt->sample_point = ((tseg1 + 1) * 1000) / alltseg;  in can_fixup_bittiming()
244 can_validate_bitrate(struct net_device *dev, struct can_bittiming *bt,  in can_validate_bitrate()  argument
252 		if (bt->bitrate == bitrate_const[i])  in can_validate_bitrate()
262 int can_get_bittiming(struct net_device *dev, struct can_bittiming *bt,  in can_get_bittiming()  argument
274 	if (!bt->tq && bt->bitrate && btc)  in can_get_bittiming()
275 		err = can_calc_bittiming(dev, bt, btc);  in can_get_bittiming()
276 	else if (bt->tq && !bt->bitrate && btc)  in can_get_bittiming()
277 		err = can_fixup_bittiming(dev, bt, btc);  in can_get_bittiming()
278 	else if (!bt->tq && bt->bitrate && bitrate_const)  in can_get_bittiming()
279 		err = can_validate_bitrate(dev, bt, bitrate_const,  in can_get_bittiming()