52 static int clear_epp_timeout(struct parport *pb)  in clear_epp_timeout()  argument
56 	if (!(parport_gsc_read_status(pb) & 0x01))  in clear_epp_timeout()
60 	parport_gsc_read_status(pb);  in clear_epp_timeout()
61 	r = parport_gsc_read_status(pb);  in clear_epp_timeout()
62 	parport_writeb (r | 0x01, STATUS (pb)); /* Some reset by writing 1 */  in clear_epp_timeout()
63 	parport_writeb (r & 0xfe, STATUS (pb)); /* Others by writing 0 */  in clear_epp_timeout()
64 	r = parport_gsc_read_status(pb);  in clear_epp_timeout()
134 static int parport_SPP_supported(struct parport *pb)  in parport_SPP_supported()  argument
144 	clear_epp_timeout(pb);  in parport_SPP_supported()
148 	parport_writeb (w, CONTROL (pb));  in parport_SPP_supported()
155 	r = parport_readb (CONTROL (pb));  in parport_SPP_supported()
158 		parport_writeb (w, CONTROL (pb));  in parport_SPP_supported()
159 		r = parport_readb (CONTROL (pb));  in parport_SPP_supported()
160 		parport_writeb (0xc, CONTROL (pb));  in parport_SPP_supported()
168 	parport_gsc_write_data (pb, w);  in parport_SPP_supported()
169 	r = parport_gsc_read_data (pb);  in parport_SPP_supported()
172 		parport_gsc_write_data (pb, w);  in parport_SPP_supported()
173 		r = parport_gsc_read_data (pb);  in parport_SPP_supported()
198 static int parport_PS2_supported(struct parport *pb)  in parport_PS2_supported()  argument
202 	clear_epp_timeout(pb);  in parport_PS2_supported()
205 	parport_gsc_data_reverse (pb);  in parport_PS2_supported()
207 	parport_gsc_write_data(pb, 0x55);  in parport_PS2_supported()
208 	if (parport_gsc_read_data(pb) != 0x55) ok++;  in parport_PS2_supported()
210 	parport_gsc_write_data(pb, 0xaa);  in parport_PS2_supported()
211 	if (parport_gsc_read_data(pb) != 0xaa) ok++;  in parport_PS2_supported()
214 	parport_gsc_data_forward (pb);  in parport_PS2_supported()
217 		pb->modes |= PARPORT_MODE_TRISTATE;  in parport_PS2_supported()
219 		struct parport_gsc_private *priv = pb->private_data;  in parport_PS2_supported()