xref: /openbmc/linux/arch/sparc/include/asm/auxio_32.h (revision b2441318)
1 /* SPDX-License-Identifier: GPL-2.0 */
2 /*
3  * auxio.h:  Definitions and code for the Auxiliary I/O register.
4  *
5  * Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu)
6  */
7 #ifndef _SPARC_AUXIO_H
8 #define _SPARC_AUXIO_H
9 
10 #include <asm/vaddrs.h>
11 
12 /* This register is an unsigned char in IO space.  It does two things.
13  * First, it is used to control the front panel LED light on machines
14  * that have it (good for testing entry points to trap handlers and irq's)
15  * Secondly, it controls various floppy drive parameters.
16  */
17 #define AUXIO_ORMEIN      0xf0    /* All writes must set these bits. */
18 #define AUXIO_ORMEIN4M    0xc0    /* sun4m - All writes must set these bits. */
19 #define AUXIO_FLPY_DENS   0x20    /* Floppy density, high if set. Read only. */
20 #define AUXIO_FLPY_DCHG   0x10    /* A disk change occurred.  Read only. */
21 #define AUXIO_EDGE_ON     0x10    /* sun4m - On means Jumper block is in. */
22 #define AUXIO_FLPY_DSEL   0x08    /* Drive select/start-motor. Write only. */
23 #define AUXIO_LINK_TEST   0x08    /* sun4m - On means TPE Carrier detect. */
24 
25 /* Set the following to one, then zero, after doing a pseudo DMA transfer. */
26 #define AUXIO_FLPY_TCNT   0x04    /* Floppy terminal count. Write only. */
27 
28 /* Set the following to zero to eject the floppy. */
29 #define AUXIO_FLPY_EJCT   0x02    /* Eject floppy disk.  Write only. */
30 #define AUXIO_LED         0x01    /* On if set, off if unset. Read/Write */
31 
32 #ifndef __ASSEMBLY__
33 
34 /*
35  * NOTE: these routines are implementation dependent--
36  * understand the hardware you are querying!
37  */
38 void set_auxio(unsigned char bits_on, unsigned char bits_off);
39 unsigned char get_auxio(void); /* .../asm/floppy.h */
40 
41 /*
42  * The following routines are provided for driver-compatibility
43  * with sparc64 (primarily sunlance.c)
44  */
45 
46 #define AUXIO_LTE_ON    1
47 #define AUXIO_LTE_OFF   0
48 
49 /* auxio_set_lte - Set Link Test Enable (TPE Link Detect)
50  *
51  * on - AUXIO_LTE_ON or AUXIO_LTE_OFF
52  */
53 #define auxio_set_lte(on) \
54 do { \
55 	if(on) { \
56 		set_auxio(AUXIO_LINK_TEST, 0); \
57 	} else { \
58 		set_auxio(0, AUXIO_LINK_TEST); \
59 	} \
60 } while (0)
61 
62 #define AUXIO_LED_ON    1
63 #define AUXIO_LED_OFF   0
64 
65 /* auxio_set_led - Set system front panel LED
66  *
67  * on - AUXIO_LED_ON or AUXIO_LED_OFF
68  */
69 #define auxio_set_led(on) \
70 do { \
71 	if(on) { \
72 		set_auxio(AUXIO_LED, 0); \
73 	} else { \
74 		set_auxio(0, AUXIO_LED); \
75 	} \
76 } while (0)
77 
78 #endif /* !(__ASSEMBLY__) */
79 
80 
81 /* AUXIO2 (Power Off Control) */
82 extern volatile u8 __iomem *auxio_power_register;
83 
84 #define	AUXIO_POWER_DETECT_FAILURE	32
85 #define	AUXIO_POWER_CLEAR_FAILURE	2
86 #define	AUXIO_POWER_OFF			1
87 
88 
89 #endif /* !(_SPARC_AUXIO_H) */
90