103 static int can_calc_bittiming(struct net_device *dev, struct can_bittiming *bt,  in can_calc_bittiming()  argument
115 	if (bt->sample_point) {  in can_calc_bittiming()
116 		sampl_pt = bt->sample_point;  in can_calc_bittiming()
118 		if (bt->bitrate > 800000)  in can_calc_bittiming()
120 		else if (bt->bitrate > 500000)  in can_calc_bittiming()
131 		brp = priv->clock.freq / (tsegall * bt->bitrate) + tseg % 2;  in can_calc_bittiming()
137 		error = bt->bitrate - rate;  in can_calc_bittiming()
162 		error = (best_error * 1000) / bt->bitrate;  in can_calc_bittiming()
175 	bt->sample_point = can_update_spt(btc, sampl_pt, best_tseg,  in can_calc_bittiming()
180 	bt->tq = (u32)v64;  in can_calc_bittiming()
181 	bt->prop_seg = tseg1 / 2;  in can_calc_bittiming()
182 	bt->phase_seg1 = tseg1 - bt->prop_seg;  in can_calc_bittiming()
183 	bt->phase_seg2 = tseg2;  in can_calc_bittiming()
186 	if (!bt->sjw || !btc->sjw_max)  in can_calc_bittiming()
187 		bt->sjw = 1;  in can_calc_bittiming()
190 		if (bt->sjw > btc->sjw_max)  in can_calc_bittiming()
191 			bt->sjw = btc->sjw_max;  in can_calc_bittiming()
193 		if (tseg2 < bt->sjw)  in can_calc_bittiming()
194 			bt->sjw = tseg2;  in can_calc_bittiming()
197 	bt->brp = best_brp;  in can_calc_bittiming()
199 	bt->bitrate = priv->clock.freq / (bt->brp * (tseg1 + tseg2 + 1));  in can_calc_bittiming()
204 static int can_calc_bittiming(struct net_device *dev, struct can_bittiming *bt,  in can_calc_bittiming()  argument
218 static int can_fixup_bittiming(struct net_device *dev, struct can_bittiming *bt,  in can_fixup_bittiming()  argument
225 	tseg1 = bt->prop_seg + bt->phase_seg1;  in can_fixup_bittiming()
226 	if (!bt->sjw)  in can_fixup_bittiming()
227 		bt->sjw = 1;  in can_fixup_bittiming()
228 	if (bt->sjw > btc->sjw_max ||  in can_fixup_bittiming()
230 	    bt->phase_seg2 < btc->tseg2_min || bt->phase_seg2 > btc->tseg2_max)  in can_fixup_bittiming()
233 	brp64 = (u64)priv->clock.freq * (u64)bt->tq;  in can_fixup_bittiming()
240 	bt->brp = (u32)brp64;  in can_fixup_bittiming()
242 	if (bt->brp < btc->brp_min || bt->brp > btc->brp_max)  in can_fixup_bittiming()
245 	alltseg = bt->prop_seg + bt->phase_seg1 + bt->phase_seg2 + 1;  in can_fixup_bittiming()
246 	bt->bitrate = priv->clock.freq / (bt->brp * alltseg);  in can_fixup_bittiming()
247 	bt->sample_point = ((tseg1 + 1) * 1000) / alltseg;  in can_fixup_bittiming()
252 static int can_get_bittiming(struct net_device *dev, struct can_bittiming *bt,  in can_get_bittiming()  argument
267 	if (!bt->tq && bt->bitrate)  in can_get_bittiming()
268 		err = can_calc_bittiming(dev, bt, btc);  in can_get_bittiming()
269 	else if (bt->tq && !bt->bitrate)  in can_get_bittiming()
270 		err = can_fixup_bittiming(dev, bt, btc);  in can_get_bittiming()
759 		struct can_bittiming bt;  in can_changelink()  local
764 		memcpy(&bt, nla_data(data[IFLA_CAN_BITTIMING]), sizeof(bt));  in can_changelink()
765 		err = can_get_bittiming(dev, &bt, priv->bittiming_const);  in can_changelink()
768 		memcpy(&priv->bittiming, &bt, sizeof(bt));  in can_changelink()