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1/* auxio.c: Probing for the Sparc AUXIO register at boot time.
2 *
3 * Copyright (C) 1996 David S. Miller (davem@caip.rutgers.edu)
4 */
5
6#include <linux/stddef.h>
7#include <linux/init.h>
8#include <linux/spinlock.h>
9#include <linux/of.h>
10#include <linux/of_device.h>
11#include <linux/export.h>
12#include <asm/oplib.h>
13#include <asm/io.h>
14#include <asm/auxio.h>
15#include <asm/string.h> /* memset(), Linux has no bzero() */
16#include <asm/cpu_type.h>
17
18/* Probe and map in the Auxiliary I/O register */
19
20/* auxio_register is not static because it is referenced
21 * in entry.S::floppy_tdone
22 */
23void __iomem *auxio_register = NULL;
24static DEFINE_SPINLOCK(auxio_lock);
25
26void __init auxio_probe(void)
27{
28 phandle node, auxio_nd;
29 struct linux_prom_registers auxregs[1];
30 struct resource r;
31
32 switch (sparc_cpu_model) {
33 case sparc_leon:
34 case sun4d:
35 return;
36 default:
37 break;
38 }
39 node = prom_getchild(prom_root_node);
40 auxio_nd = prom_searchsiblings(node, "auxiliary-io");
41 if(!auxio_nd) {
42 node = prom_searchsiblings(node, "obio");
43 node = prom_getchild(node);
44 auxio_nd = prom_searchsiblings(node, "auxio");
45 if(!auxio_nd) {
46#ifdef CONFIG_PCI
47 /* There may be auxio on Ebus */
48 return;
49#else
50 if(prom_searchsiblings(node, "leds")) {
51 /* VME chassis sun4m machine, no auxio exists. */
52 return;
53 }
54 prom_printf("Cannot find auxio node, cannot continue...\n");
55 prom_halt();
56#endif
57 }
58 }
59 if(prom_getproperty(auxio_nd, "reg", (char *) auxregs, sizeof(auxregs)) <= 0)
60 return;
61 prom_apply_obio_ranges(auxregs, 0x1);
62 /* Map the register both read and write */
63 r.flags = auxregs[0].which_io & 0xF;
64 r.start = auxregs[0].phys_addr;
65 r.end = auxregs[0].phys_addr + auxregs[0].reg_size - 1;
66 auxio_register = of_ioremap(&r, 0, auxregs[0].reg_size, "auxio");
67 /* Fix the address on sun4m. */
68 if ((((unsigned long) auxregs[0].phys_addr) & 3) == 3)
69 auxio_register += (3 - ((unsigned long)auxio_register & 3));
70
71 set_auxio(AUXIO_LED, 0);
72}
73
74unsigned char get_auxio(void)
75{
76 if(auxio_register)
77 return sbus_readb(auxio_register);
78 return 0;
79}
80EXPORT_SYMBOL(get_auxio);
81
82void set_auxio(unsigned char bits_on, unsigned char bits_off)
83{
84 unsigned char regval;
85 unsigned long flags;
86 spin_lock_irqsave(&auxio_lock, flags);
87 switch (sparc_cpu_model) {
88 case sun4m:
89 if(!auxio_register)
90 break; /* VME chassis sun4m, no auxio. */
91 regval = sbus_readb(auxio_register);
92 sbus_writeb(((regval | bits_on) & ~bits_off) | AUXIO_ORMEIN4M,
93 auxio_register);
94 break;
95 case sun4d:
96 break;
97 default:
98 panic("Can't set AUXIO register on this machine.");
99 }
100 spin_unlock_irqrestore(&auxio_lock, flags);
101}
102EXPORT_SYMBOL(set_auxio);
103
104/* sun4m power control register (AUXIO2) */
105
106volatile unsigned char * auxio_power_register = NULL;
107
108void __init auxio_power_probe(void)
109{
110 struct linux_prom_registers regs;
111 phandle node;
112 struct resource r;
113
114 /* Attempt to find the sun4m power control node. */
115 node = prom_getchild(prom_root_node);
116 node = prom_searchsiblings(node, "obio");
117 node = prom_getchild(node);
118 node = prom_searchsiblings(node, "power");
119 if (node == 0 || (s32)node == -1)
120 return;
121
122 /* Map the power control register. */
123 if (prom_getproperty(node, "reg", (char *)®s, sizeof(regs)) <= 0)
124 return;
125 prom_apply_obio_ranges(®s, 1);
126 memset(&r, 0, sizeof(r));
127 r.flags = regs.which_io & 0xF;
128 r.start = regs.phys_addr;
129 r.end = regs.phys_addr + regs.reg_size - 1;
130 auxio_power_register = (unsigned char *) of_ioremap(&r, 0,
131 regs.reg_size, "auxpower");
132
133 /* Display a quick message on the console. */
134 if (auxio_power_register)
135 printk(KERN_INFO "Power off control detected.\n");
136}
1/* auxio.c: Probing for the Sparc AUXIO register at boot time.
2 *
3 * Copyright (C) 1996 David S. Miller (davem@caip.rutgers.edu)
4 */
5
6#include <linux/stddef.h>
7#include <linux/init.h>
8#include <linux/spinlock.h>
9#include <linux/of.h>
10#include <linux/of_device.h>
11#include <linux/export.h>
12#include <asm/oplib.h>
13#include <asm/io.h>
14#include <asm/auxio.h>
15#include <asm/string.h> /* memset(), Linux has no bzero() */
16#include <asm/cpu_type.h>
17
18/* Probe and map in the Auxiliary I/O register */
19
20/* auxio_register is not static because it is referenced
21 * in entry.S::floppy_tdone
22 */
23void __iomem *auxio_register = NULL;
24static DEFINE_SPINLOCK(auxio_lock);
25
26void __init auxio_probe(void)
27{
28 phandle node, auxio_nd;
29 struct linux_prom_registers auxregs[1];
30 struct resource r;
31
32 switch (sparc_cpu_model) {
33 case sparc_leon:
34 case sun4d:
35 return;
36 default:
37 break;
38 }
39 node = prom_getchild(prom_root_node);
40 auxio_nd = prom_searchsiblings(node, "auxiliary-io");
41 if(!auxio_nd) {
42 node = prom_searchsiblings(node, "obio");
43 node = prom_getchild(node);
44 auxio_nd = prom_searchsiblings(node, "auxio");
45 if(!auxio_nd) {
46#ifdef CONFIG_PCI
47 /* There may be auxio on Ebus */
48 return;
49#else
50 if(prom_searchsiblings(node, "leds")) {
51 /* VME chassis sun4m machine, no auxio exists. */
52 return;
53 }
54 prom_printf("Cannot find auxio node, cannot continue...\n");
55 prom_halt();
56#endif
57 }
58 }
59 if(prom_getproperty(auxio_nd, "reg", (char *) auxregs, sizeof(auxregs)) <= 0)
60 return;
61 prom_apply_obio_ranges(auxregs, 0x1);
62 /* Map the register both read and write */
63 r.flags = auxregs[0].which_io & 0xF;
64 r.start = auxregs[0].phys_addr;
65 r.end = auxregs[0].phys_addr + auxregs[0].reg_size - 1;
66 auxio_register = of_ioremap(&r, 0, auxregs[0].reg_size, "auxio");
67 /* Fix the address on sun4m. */
68 if ((((unsigned long) auxregs[0].phys_addr) & 3) == 3)
69 auxio_register += (3 - ((unsigned long)auxio_register & 3));
70
71 set_auxio(AUXIO_LED, 0);
72}
73
74unsigned char get_auxio(void)
75{
76 if(auxio_register)
77 return sbus_readb(auxio_register);
78 return 0;
79}
80EXPORT_SYMBOL(get_auxio);
81
82void set_auxio(unsigned char bits_on, unsigned char bits_off)
83{
84 unsigned char regval;
85 unsigned long flags;
86 spin_lock_irqsave(&auxio_lock, flags);
87 switch (sparc_cpu_model) {
88 case sun4m:
89 if(!auxio_register)
90 break; /* VME chassis sun4m, no auxio. */
91 regval = sbus_readb(auxio_register);
92 sbus_writeb(((regval | bits_on) & ~bits_off) | AUXIO_ORMEIN4M,
93 auxio_register);
94 break;
95 case sun4d:
96 break;
97 default:
98 panic("Can't set AUXIO register on this machine.");
99 }
100 spin_unlock_irqrestore(&auxio_lock, flags);
101}
102EXPORT_SYMBOL(set_auxio);
103
104/* sun4m power control register (AUXIO2) */
105
106volatile unsigned char * auxio_power_register = NULL;
107
108void __init auxio_power_probe(void)
109{
110 struct linux_prom_registers regs;
111 phandle node;
112 struct resource r;
113
114 /* Attempt to find the sun4m power control node. */
115 node = prom_getchild(prom_root_node);
116 node = prom_searchsiblings(node, "obio");
117 node = prom_getchild(node);
118 node = prom_searchsiblings(node, "power");
119 if (node == 0 || (s32)node == -1)
120 return;
121
122 /* Map the power control register. */
123 if (prom_getproperty(node, "reg", (char *)®s, sizeof(regs)) <= 0)
124 return;
125 prom_apply_obio_ranges(®s, 1);
126 memset(&r, 0, sizeof(r));
127 r.flags = regs.which_io & 0xF;
128 r.start = regs.phys_addr;
129 r.end = regs.phys_addr + regs.reg_size - 1;
130 auxio_power_register = (unsigned char *) of_ioremap(&r, 0,
131 regs.reg_size, "auxpower");
132
133 /* Display a quick message on the console. */
134 if (auxio_power_register)
135 printk(KERN_INFO "Power off control detected.\n");
136}