41 	struct parport *port;  member
50 static int mux_present(struct parport *port);
51 static int num_mux_ports(struct parport *port);
52 static int select_port(struct parport *port);
53 static int assign_addrs(struct parport *port);
56 static void add_dev(int devnum, struct parport *port, int daisy)  in add_dev()  argument
61 		newdev->port = port;  in add_dev()
92 int parport_daisy_init(struct parport *port)  in parport_daisy_init()  argument
107 	if (port->muxport < 0 && mux_present(port) &&  in parport_daisy_init()
109 	    ((num_ports = num_mux_ports(port)) == 2 || num_ports == 4)) {  in parport_daisy_init()
111 		port->muxport = 0;  in parport_daisy_init()
114 			port->name, num_ports);  in parport_daisy_init()
117 			struct parport *extra = clone_parport(port, i);  in parport_daisy_init()
129 				port->name);  in parport_daisy_init()
138 	if (port->muxport >= 0)  in parport_daisy_init()
139 		select_port(port);  in parport_daisy_init()
141 	parport_daisy_deselect_all(port);  in parport_daisy_init()
142 	detected += assign_addrs(port);  in parport_daisy_init()
145 	add_dev(numdevs++, port, -1);  in parport_daisy_init()
160 		parport_daisy_fini(port);  in parport_daisy_init()
161 		parport_write_control(port, PARPORT_CONTROL_SELECT);  in parport_daisy_init()
163 		parport_write_control(port,  in parport_daisy_init()
175 void parport_daisy_fini(struct parport *port)  in parport_daisy_fini()  argument
183 		if (dev->port != port) {  in parport_daisy_fini()
216 	struct parport *port;  in parport_open()  local
230 	port = parport_get_port(p->port);  in parport_open()
233 	dev = parport_register_device(port, name, NULL, NULL, NULL, 0, NULL);  in parport_open()
234 	parport_put_port(port);  in parport_open()
244 		selected = port->daisy;  in parport_open()
271 static int cpp_daisy(struct parport *port, int cmd)  in cpp_daisy()  argument
275 	parport_data_forward(port);  in cpp_daisy()
276 	parport_write_data(port, 0xaa); udelay(2);  in cpp_daisy()
277 	parport_write_data(port, 0x55); udelay(2);  in cpp_daisy()
278 	parport_write_data(port, 0x00); udelay(2);  in cpp_daisy()
279 	parport_write_data(port, 0xff); udelay(2);  in cpp_daisy()
280 	s = parport_read_status(port) & (PARPORT_STATUS_BUSY  in cpp_daisy()
289 			 port->name, s);  in cpp_daisy()
293 	parport_write_data(port, 0x87); udelay(2);  in cpp_daisy()
294 	s = parport_read_status(port) & (PARPORT_STATUS_BUSY  in cpp_daisy()
300 			 port->name, s);  in cpp_daisy()
304 	parport_write_data(port, 0x78); udelay(2);  in cpp_daisy()
305 	parport_write_data(port, cmd); udelay(2);  in cpp_daisy()
306 	parport_frob_control(port,  in cpp_daisy()
310 	s = parport_read_status(port);  in cpp_daisy()
311 	parport_frob_control(port, PARPORT_CONTROL_STROBE, 0);  in cpp_daisy()
313 	parport_write_data(port, 0xff); udelay(2);  in cpp_daisy()
319 static int cpp_mux(struct parport *port, int cmd)  in cpp_mux()  argument
324 	parport_data_forward(port);  in cpp_mux()
325 	parport_write_data(port, 0xaa); udelay(2);  in cpp_mux()
326 	parport_write_data(port, 0x55); udelay(2);  in cpp_mux()
327 	parport_write_data(port, 0xf0); udelay(2);  in cpp_mux()
328 	parport_write_data(port, 0x0f); udelay(2);  in cpp_mux()
329 	parport_write_data(port, 0x52); udelay(2);  in cpp_mux()
330 	parport_write_data(port, 0xad); udelay(2);  in cpp_mux()
331 	parport_write_data(port, cmd); udelay(2);  in cpp_mux()
333 	s = parport_read_status(port);  in cpp_mux()
336 			 port->name, cmd, s);  in cpp_mux()
348 void parport_daisy_deselect_all(struct parport *port)  in parport_daisy_deselect_all()  argument
350 	cpp_daisy(port, 0x30);  in parport_daisy_deselect_all()
353 int parport_daisy_select(struct parport *port, int daisy, int mode)  in parport_daisy_select()  argument
361 			return !(cpp_daisy(port, 0x20 + daisy) &  in parport_daisy_select()
368 			return !(cpp_daisy(port, 0xd0 + daisy) &  in parport_daisy_select()
379 			return !(cpp_daisy(port, 0xe0 + daisy) &  in parport_daisy_select()
384 static int mux_present(struct parport *port)  in mux_present()  argument
386 	return cpp_mux(port, 0x51) == 3;  in mux_present()
389 static int num_mux_ports(struct parport *port)  in num_mux_ports()  argument
391 	return cpp_mux(port, 0x58);  in num_mux_ports()
394 static int select_port(struct parport *port)  in select_port()  argument
396 	int muxport = port->muxport;  in select_port()
397 	return cpp_mux(port, 0x60 + muxport) == muxport;  in select_port()
400 static int assign_addrs(struct parport *port)  in assign_addrs()  argument
408 	parport_data_forward(port);  in assign_addrs()
409 	parport_write_data(port, 0xaa); udelay(2);  in assign_addrs()
410 	parport_write_data(port, 0x55); udelay(2);  in assign_addrs()
411 	parport_write_data(port, 0x00); udelay(2);  in assign_addrs()
412 	parport_write_data(port, 0xff); udelay(2);  in assign_addrs()
413 	s = parport_read_status(port) & (PARPORT_STATUS_BUSY  in assign_addrs()
422 			 port->name, s);  in assign_addrs()
426 	parport_write_data(port, 0x87); udelay(2);  in assign_addrs()
427 	s = parport_read_status(port) & (PARPORT_STATUS_BUSY  in assign_addrs()
433 			 port->name, s);  in assign_addrs()
437 	parport_write_data(port, 0x78); udelay(2);  in assign_addrs()
438 	s = parport_read_status(port);  in assign_addrs()
445 		parport_write_data(port, daisy);  in assign_addrs()
447 		parport_frob_control(port,  in assign_addrs()
451 		parport_frob_control(port, PARPORT_CONTROL_STROBE, 0);  in assign_addrs()
454 		add_dev(numdevs++, port, daisy);  in assign_addrs()
465 		s = parport_read_status(port);  in assign_addrs()
468 	parport_write_data(port, 0xff); udelay(2);  in assign_addrs()
470 	DPRINTK(KERN_DEBUG "%s: Found %d daisy-chained devices\n", port->name,  in assign_addrs()