diff options
author | Sam Ravnborg <sam@ravnborg.org> | 2008-12-03 06:08:37 -0500 |
---|---|---|
committer | David S. Miller <davem@davemloft.net> | 2008-12-04 12:17:20 -0500 |
commit | d670bd4f803c8b646acd20f3ba21e65458293faf (patch) | |
tree | eabc30aadce1556023c4aa445c649ba9e1d3f352 /arch/sparc/kernel/auxio_32.c | |
parent | 478b8fecda511942404ac232897a718cecd13e48 (diff) |
sparc: prepare kernel/ for unification
o sparc32 files with identical names to sparc64 renamed to <name>_32.S
o introduced a few Kconfig helpers to simplify Makefile logic
o refactored Makefile to prepare for unification
- use obj-$(CONFIG_SPARC32) for sparc32 specific files
- use <name>_$(BITS) for files where sparc64 has a _64 variant
- sparc64 directly include a few files where sparc32 builds them,
refer to these files directly (no BITS)
- sneaked in -Werror as used by sparc64
o modified sparc/Makefile to use the new names for head/init_task
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'arch/sparc/kernel/auxio_32.c')
-rw-r--r-- | arch/sparc/kernel/auxio_32.c | 139 |
1 files changed, 139 insertions, 0 deletions
diff --git a/arch/sparc/kernel/auxio_32.c b/arch/sparc/kernel/auxio_32.c new file mode 100644 index 000000000000..09c857215a52 --- /dev/null +++ b/arch/sparc/kernel/auxio_32.c | |||
@@ -0,0 +1,139 @@ | |||
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 <asm/oplib.h> | ||
12 | #include <asm/io.h> | ||
13 | #include <asm/auxio.h> | ||
14 | #include <asm/string.h> /* memset(), Linux has no bzero() */ | ||
15 | |||
16 | /* Probe and map in the Auxiliary I/O register */ | ||
17 | |||
18 | /* auxio_register is not static because it is referenced | ||
19 | * in entry.S::floppy_tdone | ||
20 | */ | ||
21 | void __iomem *auxio_register = NULL; | ||
22 | static DEFINE_SPINLOCK(auxio_lock); | ||
23 | |||
24 | void __init auxio_probe(void) | ||
25 | { | ||
26 | int node, auxio_nd; | ||
27 | struct linux_prom_registers auxregs[1]; | ||
28 | struct resource r; | ||
29 | |||
30 | switch (sparc_cpu_model) { | ||
31 | case sun4d: | ||
32 | case sun4: | ||
33 | return; | ||
34 | default: | ||
35 | break; | ||
36 | } | ||
37 | node = prom_getchild(prom_root_node); | ||
38 | auxio_nd = prom_searchsiblings(node, "auxiliary-io"); | ||
39 | if(!auxio_nd) { | ||
40 | node = prom_searchsiblings(node, "obio"); | ||
41 | node = prom_getchild(node); | ||
42 | auxio_nd = prom_searchsiblings(node, "auxio"); | ||
43 | if(!auxio_nd) { | ||
44 | #ifdef CONFIG_PCI | ||
45 | /* There may be auxio on Ebus */ | ||
46 | return; | ||
47 | #else | ||
48 | if(prom_searchsiblings(node, "leds")) { | ||
49 | /* VME chassis sun4m machine, no auxio exists. */ | ||
50 | return; | ||
51 | } | ||
52 | prom_printf("Cannot find auxio node, cannot continue...\n"); | ||
53 | prom_halt(); | ||
54 | #endif | ||
55 | } | ||
56 | } | ||
57 | if(prom_getproperty(auxio_nd, "reg", (char *) auxregs, sizeof(auxregs)) <= 0) | ||
58 | return; | ||
59 | prom_apply_obio_ranges(auxregs, 0x1); | ||
60 | /* Map the register both read and write */ | ||
61 | r.flags = auxregs[0].which_io & 0xF; | ||
62 | r.start = auxregs[0].phys_addr; | ||
63 | r.end = auxregs[0].phys_addr + auxregs[0].reg_size - 1; | ||
64 | auxio_register = of_ioremap(&r, 0, auxregs[0].reg_size, "auxio"); | ||
65 | /* Fix the address on sun4m and sun4c. */ | ||
66 | if((((unsigned long) auxregs[0].phys_addr) & 3) == 3 || | ||
67 | sparc_cpu_model == sun4c) | ||
68 | auxio_register += (3 - ((unsigned long)auxio_register & 3)); | ||
69 | |||
70 | set_auxio(AUXIO_LED, 0); | ||
71 | } | ||
72 | |||
73 | unsigned char get_auxio(void) | ||
74 | { | ||
75 | if(auxio_register) | ||
76 | return sbus_readb(auxio_register); | ||
77 | return 0; | ||
78 | } | ||
79 | |||
80 | void set_auxio(unsigned char bits_on, unsigned char bits_off) | ||
81 | { | ||
82 | unsigned char regval; | ||
83 | unsigned long flags; | ||
84 | spin_lock_irqsave(&auxio_lock, flags); | ||
85 | switch(sparc_cpu_model) { | ||
86 | case sun4c: | ||
87 | regval = sbus_readb(auxio_register); | ||
88 | sbus_writeb(((regval | bits_on) & ~bits_off) | AUXIO_ORMEIN, | ||
89 | auxio_register); | ||
90 | break; | ||
91 | case sun4m: | ||
92 | if(!auxio_register) | ||
93 | break; /* VME chassis sun4m, no auxio. */ | ||
94 | regval = sbus_readb(auxio_register); | ||
95 | sbus_writeb(((regval | bits_on) & ~bits_off) | AUXIO_ORMEIN4M, | ||
96 | auxio_register); | ||
97 | break; | ||
98 | case sun4d: | ||
99 | break; | ||
100 | default: | ||
101 | panic("Can't set AUXIO register on this machine."); | ||
102 | }; | ||
103 | spin_unlock_irqrestore(&auxio_lock, flags); | ||
104 | } | ||
105 | |||
106 | |||
107 | /* sun4m power control register (AUXIO2) */ | ||
108 | |||
109 | volatile unsigned char * auxio_power_register = NULL; | ||
110 | |||
111 | void __init auxio_power_probe(void) | ||
112 | { | ||
113 | struct linux_prom_registers regs; | ||
114 | int node; | ||
115 | struct resource r; | ||
116 | |||
117 | /* Attempt to find the sun4m power control node. */ | ||
118 | node = prom_getchild(prom_root_node); | ||
119 | node = prom_searchsiblings(node, "obio"); | ||
120 | node = prom_getchild(node); | ||
121 | node = prom_searchsiblings(node, "power"); | ||
122 | if (node == 0 || node == -1) | ||
123 | return; | ||
124 | |||
125 | /* Map the power control register. */ | ||
126 | if (prom_getproperty(node, "reg", (char *)®s, sizeof(regs)) <= 0) | ||
127 | return; | ||
128 | prom_apply_obio_ranges(®s, 1); | ||
129 | memset(&r, 0, sizeof(r)); | ||
130 | r.flags = regs.which_io & 0xF; | ||
131 | r.start = regs.phys_addr; | ||
132 | r.end = regs.phys_addr + regs.reg_size - 1; | ||
133 | auxio_power_register = (unsigned char *) of_ioremap(&r, 0, | ||
134 | regs.reg_size, "auxpower"); | ||
135 | |||
136 | /* Display a quick message on the console. */ | ||
137 | if (auxio_power_register) | ||
138 | printk(KERN_INFO "Power off control detected.\n"); | ||
139 | } | ||