[people/arne_f/kernel.git] / arch / m68k / sun3 / prom / console.c

// SPDX-License-Identifier: GPL-2.0
/*
 * console.c: Routines that deal with sending and receiving IO
 *            to/from the current console device using the PROM.
 *
 * Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu)
 */

#include <linux/types.h>
#include <linux/kernel.h>
#include <linux/sched.h>
#include <asm/openprom.h>
#include <asm/oplib.h>
#include <linux/string.h>

/* Non blocking get character from console input device, returns -1
 * if no input was taken.  This can be used for polling.
 */
int
prom_nbgetchar(void)
{
	int i = -1;
	unsigned long flags;

	local_irq_save(flags);
		i = (*(romvec->pv_nbgetchar))();
	local_irq_restore(flags);
	return i; /* Ugh, we could spin forever on unsupported proms ;( */
}

/* Non blocking put character to console device, returns -1 if
 * unsuccessful.
 */
int
prom_nbputchar(char c)
{
	unsigned long flags;
	int i = -1;

	local_irq_save(flags);
		i = (*(romvec->pv_nbputchar))(c);
	local_irq_restore(flags);
	return i; /* Ugh, we could spin forever on unsupported proms ;( */
}

/* Blocking version of get character routine above. */
char
prom_getchar(void)
{
	int character;
	while((character = prom_nbgetchar()) == -1) ;
	return (char) character;
}

/* Blocking version of put character routine above. */
void
prom_putchar(char c)
{
	while(prom_nbputchar(c) == -1) ;
	return;
}

/* Query for input device type */
#if 0
enum prom_input_device
prom_query_input_device()
{
	unsigned long flags;
	int st_p;
	char propb[64];
	char *p;

	switch(prom_vers) {
	case PROM_V0:
	case PROM_V2:
	default:
		switch(*romvec->pv_stdin) {
		case PROMDEV_KBD:	return PROMDEV_IKBD;
		case PROMDEV_TTYA:	return PROMDEV_ITTYA;
		case PROMDEV_TTYB:	return PROMDEV_ITTYB;
		default:
			return PROMDEV_I_UNK;
		};
	case PROM_V3:
	case PROM_P1275:
		local_irq_save(flags);
		st_p = (*romvec->pv_v2devops.v2_inst2pkg)(*romvec->pv_v2bootargs.fd_stdin);
		__asm__ __volatile__("ld [%0], %%g6\n\t" : :
				     "r" (&current_set[smp_processor_id()]) :
				     "memory");
		local_irq_restore(flags);
		if(prom_node_has_property(st_p, "keyboard"))
			return PROMDEV_IKBD;
		prom_getproperty(st_p, "device_type", propb, sizeof(propb));
		if(strncmp(propb, "serial", sizeof("serial")))
			return PROMDEV_I_UNK;
		prom_getproperty(prom_root_node, "stdin-path", propb, sizeof(propb));
		p = propb;
		while(*p) p++; p -= 2;
		if(p[0] == ':') {
			if(p[1] == 'a')
				return PROMDEV_ITTYA;
			else if(p[1] == 'b')
				return PROMDEV_ITTYB;
		}
		return PROMDEV_I_UNK;
	};
}
#endif

/* Query for output device type */

#if 0
enum prom_output_device
prom_query_output_device()
{
	unsigned long flags;
	int st_p;
	char propb[64];
	char *p;
	int propl;

	switch(prom_vers) {
	case PROM_V0:
		switch(*romvec->pv_stdin) {
		case PROMDEV_SCREEN:	return PROMDEV_OSCREEN;
		case PROMDEV_TTYA:	return PROMDEV_OTTYA;
		case PROMDEV_TTYB:	return PROMDEV_OTTYB;
		};
		break;
	case PROM_V2:
	case PROM_V3:
	case PROM_P1275:
		local_irq_save(flags);
		st_p = (*romvec->pv_v2devops.v2_inst2pkg)(*romvec->pv_v2bootargs.fd_stdout);
		__asm__ __volatile__("ld [%0], %%g6\n\t" : :
				     "r" (&current_set[smp_processor_id()]) :
				     "memory");
		local_irq_restore(flags);
		propl = prom_getproperty(st_p, "device_type", propb, sizeof(propb));
		if (propl >= 0 && propl == sizeof("display") &&
			strncmp("display", propb, sizeof("display")) == 0)
		{
			return PROMDEV_OSCREEN;
		}
		if(prom_vers == PROM_V3) {
			if(strncmp("serial", propb, sizeof("serial")))
				return PROMDEV_O_UNK;
			prom_getproperty(prom_root_node, "stdout-path", propb, sizeof(propb));
			p = propb;
			while(*p) p++; p -= 2;
			if(p[0]==':') {
				if(p[1] == 'a')
					return PROMDEV_OTTYA;
				else if(p[1] == 'b')
					return PROMDEV_OTTYB;
			}
			return PROMDEV_O_UNK;
		} else {
			/* This works on SS-2 (an early OpenFirmware) still. */
			switch(*romvec->pv_stdin) {
			case PROMDEV_TTYA:	return PROMDEV_OTTYA;
			case PROMDEV_TTYB:	return PROMDEV_OTTYB;
			};
		}
		break;
	};
	return PROMDEV_O_UNK;
}
#endif
Commit	Line	Data
b2441318	1	// SPDX-License-Identifier: GPL-2.0
f30828a6	2	/*
1da177e4 LT	3	* console.c: Routines that deal with sending and receiving IO
	4	* to/from the current console device using the PROM.
	5	*
	6	* Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu)
	7	*/
	8
	9	#include <linux/types.h>
	10	#include <linux/kernel.h>
	11	#include <linux/sched.h>
	12	#include <asm/openprom.h>
	13	#include <asm/oplib.h>
1da177e4 LT	14	#include <linux/string.h>
	15
	16	/* Non blocking get character from console input device, returns -1
	17	* if no input was taken. This can be used for polling.
	18	*/
	19	int
	20	prom_nbgetchar(void)
	21	{
	22	int i = -1;
	23	unsigned long flags;
	24
	25	local_irq_save(flags);
	26	i = (*(romvec->pv_nbgetchar))();
	27	local_irq_restore(flags);
	28	return i; /* Ugh, we could spin forever on unsupported proms ;( */
	29	}
	30
	31	/* Non blocking put character to console device, returns -1 if
	32	* unsuccessful.
	33	*/
	34	int
	35	prom_nbputchar(char c)
	36	{
	37	unsigned long flags;
	38	int i = -1;
	39
	40	local_irq_save(flags);
	41	i = (*(romvec->pv_nbputchar))(c);
	42	local_irq_restore(flags);
	43	return i; /* Ugh, we could spin forever on unsupported proms ;( */
	44	}
	45
	46	/* Blocking version of get character routine above. */
	47	char
	48	prom_getchar(void)
	49	{
	50	int character;
	51	while((character = prom_nbgetchar()) == -1) ;
	52	return (char) character;
	53	}
	54
	55	/* Blocking version of put character routine above. */
	56	void
	57	prom_putchar(char c)
	58	{
	59	while(prom_nbputchar(c) == -1) ;
	60	return;
	61	}
	62
	63	/* Query for input device type */
	64	#if 0
	65	enum prom_input_device
	66	prom_query_input_device()
	67	{
	68	unsigned long flags;
	69	int st_p;
	70	char propb[64];
	71	char *p;
	72
	73	switch(prom_vers) {
	74	case PROM_V0:
	75	case PROM_V2:
	76	default:
	77	switch(*romvec->pv_stdin) {
78	case PROMDEV_KBD: return PROMDEV_IKBD;
79	case PROMDEV_TTYA: return PROMDEV_ITTYA;
80	case PROMDEV_TTYB: return PROMDEV_ITTYB;
81	default:
82	return PROMDEV_I_UNK;
83	};
84	case PROM_V3:
85	case PROM_P1275:
86	local_irq_save(flags);
87	st_p = (romvec->pv_v2devops.v2_inst2pkg)(romvec->pv_v2bootargs.fd_stdin);
88	__asm__ __volatile__("ld [%0], %%g6\n\t" : :
89	"r" (&current_set[smp_processor_id()]) :
90	"memory");
91	local_irq_restore(flags);
92	if(prom_node_has_property(st_p, "keyboard"))
93	return PROMDEV_IKBD;
94	prom_getproperty(st_p, "device_type", propb, sizeof(propb));
95	if(strncmp(propb, "serial", sizeof("serial")))
96	return PROMDEV_I_UNK;
97	prom_getproperty(prom_root_node, "stdin-path", propb, sizeof(propb));
98	p = propb;
99	while(*p) p++; p -= 2;
100	if(p[0] == ':') {
101	if(p[1] == 'a')
102	return PROMDEV_ITTYA;
103	else if(p[1] == 'b')
104	return PROMDEV_ITTYB;
105	}
106	return PROMDEV_I_UNK;
1da177e4 LT	107	};
	108	}
	109	#endif
	110
	111	/* Query for output device type */
	112
	113	#if 0
	114	enum prom_output_device
	115	prom_query_output_device()
	116	{
	117	unsigned long flags;
	118	int st_p;
	119	char propb[64];
	120	char *p;
	121	int propl;
	122
	123	switch(prom_vers) {
	124	case PROM_V0:
	125	switch(*romvec->pv_stdin) {
	126	case PROMDEV_SCREEN: return PROMDEV_OSCREEN;
	127	case PROMDEV_TTYA: return PROMDEV_OTTYA;
	128	case PROMDEV_TTYB: return PROMDEV_OTTYB;
	129	};
	130	break;
	131	case PROM_V2:
	132	case PROM_V3:
	133	case PROM_P1275:
	134	local_irq_save(flags);
	135	st_p = (romvec->pv_v2devops.v2_inst2pkg)(romvec->pv_v2bootargs.fd_stdout);
	136	__asm__ __volatile__("ld [%0], %%g6\n\t" : :
	137	"r" (&current_set[smp_processor_id()]) :
	138	"memory");
	139	local_irq_restore(flags);
	140	propl = prom_getproperty(st_p, "device_type", propb, sizeof(propb));
	141	if (propl >= 0 && propl == sizeof("display") &&
	142	strncmp("display", propb, sizeof("display")) == 0)
	143	{
	144	return PROMDEV_OSCREEN;
	145	}
	146	if(prom_vers == PROM_V3) {
	147	if(strncmp("serial", propb, sizeof("serial")))
	148	return PROMDEV_O_UNK;
	149	prom_getproperty(prom_root_node, "stdout-path", propb, sizeof(propb));
	150	p = propb;
	151	while(*p) p++; p -= 2;
	152	if(p[0]==':') {
	153	if(p[1] == 'a')
	154	return PROMDEV_OTTYA;
	155	else if(p[1] == 'b')
	156	return PROMDEV_OTTYB;
	157	}
	158	return PROMDEV_O_UNK;
	159	} else {
	160	/* This works on SS-2 (an early OpenFirmware) still. */
	161	switch(*romvec->pv_stdin) {
	162	case PROMDEV_TTYA: return PROMDEV_OTTYA;
	163	case PROMDEV_TTYB: return PROMDEV_OTTYB;
	164	};
	165	}
	166	break;
1da177e4 LT	167	};
	168	return PROMDEV_O_UNK;
	169	}
	170	#endif