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-rw-r--r--arch/sh/boards/mach-x3proto/Makefile1
-rw-r--r--arch/sh/boards/mach-x3proto/ilsel.c151
-rw-r--r--arch/sh/boards/mach-x3proto/setup.c136
3 files changed, 288 insertions, 0 deletions
diff --git a/arch/sh/boards/mach-x3proto/Makefile b/arch/sh/boards/mach-x3proto/Makefile
new file mode 100644
index 000000000000..983e4551fecf
--- /dev/null
+++ b/arch/sh/boards/mach-x3proto/Makefile
@@ -0,0 +1 @@
obj-y += setup.o ilsel.o
diff --git a/arch/sh/boards/mach-x3proto/ilsel.c b/arch/sh/boards/mach-x3proto/ilsel.c
new file mode 100644
index 000000000000..b5c673c39337
--- /dev/null
+++ b/arch/sh/boards/mach-x3proto/ilsel.c
@@ -0,0 +1,151 @@
1/*
2 * arch/sh/boards/renesas/x3proto/ilsel.c
3 *
4 * Helper routines for SH-X3 proto board ILSEL.
5 *
6 * Copyright (C) 2007 Paul Mundt
7 *
8 * This file is subject to the terms and conditions of the GNU General Public
9 * License. See the file "COPYING" in the main directory of this archive
10 * for more details.
11 */
12#include <linux/init.h>
13#include <linux/kernel.h>
14#include <linux/module.h>
15#include <linux/bitmap.h>
16#include <linux/io.h>
17#include <asm/ilsel.h>
18
19/*
20 * ILSEL is split across:
21 *
22 * ILSEL0 - 0xb8100004 [ Levels 1 - 4 ]
23 * ILSEL1 - 0xb8100006 [ Levels 5 - 8 ]
24 * ILSEL2 - 0xb8100008 [ Levels 9 - 12 ]
25 * ILSEL3 - 0xb810000a [ Levels 13 - 15 ]
26 *
27 * With each level being relative to an ilsel_source_t.
28 */
29#define ILSEL_BASE 0xb8100004
30#define ILSEL_LEVELS 15
31
32/*
33 * ILSEL level map, in descending order from the highest level down.
34 *
35 * Supported levels are 1 - 15 spread across ILSEL0 - ILSEL4, mapping
36 * directly to IRLs. As the IRQs are numbered in reverse order relative
37 * to the interrupt level, the level map is carefully managed to ensure a
38 * 1:1 mapping between the bit position and the IRQ number.
39 *
40 * This careful constructions allows ilsel_enable*() to be referenced
41 * directly for hooking up an ILSEL set and getting back an IRQ which can
42 * subsequently be used for internal accounting in the (optional) disable
43 * path.
44 */
45static unsigned long ilsel_level_map;
46
47static inline unsigned int ilsel_offset(unsigned int bit)
48{
49 return ILSEL_LEVELS - bit - 1;
50}
51
52static inline unsigned long mk_ilsel_addr(unsigned int bit)
53{
54 return ILSEL_BASE + ((ilsel_offset(bit) >> 1) & ~0x1);
55}
56
57static inline unsigned int mk_ilsel_shift(unsigned int bit)
58{
59 return (ilsel_offset(bit) & 0x3) << 2;
60}
61
62static void __ilsel_enable(ilsel_source_t set, unsigned int bit)
63{
64 unsigned int tmp, shift;
65 unsigned long addr;
66
67 addr = mk_ilsel_addr(bit);
68 shift = mk_ilsel_shift(bit);
69
70 pr_debug("%s: bit#%d: addr - 0x%08lx (shift %d, set %d)\n",
71 __func__, bit, addr, shift, set);
72
73 tmp = ctrl_inw(addr);
74 tmp &= ~(0xf << shift);
75 tmp |= set << shift;
76 ctrl_outw(tmp, addr);
77}
78
79/**
80 * ilsel_enable - Enable an ILSEL set.
81 * @set: ILSEL source (see ilsel_source_t enum in include/asm-sh/ilsel.h).
82 *
83 * Enables a given non-aliased ILSEL source (<= ILSEL_KEY) at the highest
84 * available interrupt level. Callers should take care to order callsites
85 * noting descending interrupt levels. Aliasing FPGA and external board
86 * IRQs need to use ilsel_enable_fixed().
87 *
88 * The return value is an IRQ number that can later be taken down with
89 * ilsel_disable().
90 */
91int ilsel_enable(ilsel_source_t set)
92{
93 unsigned int bit;
94
95 /* Aliased sources must use ilsel_enable_fixed() */
96 BUG_ON(set > ILSEL_KEY);
97
98 do {
99 bit = find_first_zero_bit(&ilsel_level_map, ILSEL_LEVELS);
100 } while (test_and_set_bit(bit, &ilsel_level_map));
101
102 __ilsel_enable(set, bit);
103
104 return bit;
105}
106EXPORT_SYMBOL_GPL(ilsel_enable);
107
108/**
109 * ilsel_enable_fixed - Enable an ILSEL set at a fixed interrupt level
110 * @set: ILSEL source (see ilsel_source_t enum in include/asm-sh/ilsel.h).
111 * @level: Interrupt level (1 - 15)
112 *
113 * Enables a given ILSEL source at a fixed interrupt level. Necessary
114 * both for level reservation as well as for aliased sources that only
115 * exist on special ILSEL#s.
116 *
117 * Returns an IRQ number (as ilsel_enable()).
118 */
119int ilsel_enable_fixed(ilsel_source_t set, unsigned int level)
120{
121 unsigned int bit = ilsel_offset(level - 1);
122
123 if (test_and_set_bit(bit, &ilsel_level_map))
124 return -EBUSY;
125
126 __ilsel_enable(set, bit);
127
128 return bit;
129}
130EXPORT_SYMBOL_GPL(ilsel_enable_fixed);
131
132/**
133 * ilsel_disable - Disable an ILSEL set
134 * @irq: Bit position for ILSEL set value (retval from enable routines)
135 *
136 * Disable a previously enabled ILSEL set.
137 */
138void ilsel_disable(unsigned int irq)
139{
140 unsigned long addr;
141 unsigned int tmp;
142
143 addr = mk_ilsel_addr(irq);
144
145 tmp = ctrl_inw(addr);
146 tmp &= ~(0xf << mk_ilsel_shift(irq));
147 ctrl_outw(tmp, addr);
148
149 clear_bit(irq, &ilsel_level_map);
150}
151EXPORT_SYMBOL_GPL(ilsel_disable);
diff --git a/arch/sh/boards/mach-x3proto/setup.c b/arch/sh/boards/mach-x3proto/setup.c
new file mode 100644
index 000000000000..abc5b6d418fe
--- /dev/null
+++ b/arch/sh/boards/mach-x3proto/setup.c
@@ -0,0 +1,136 @@
1/*
2 * arch/sh/boards/renesas/x3proto/setup.c
3 *
4 * Renesas SH-X3 Prototype Board Support.
5 *
6 * Copyright (C) 2007 Paul Mundt
7 *
8 * This file is subject to the terms and conditions of the GNU General Public
9 * License. See the file "COPYING" in the main directory of this archive
10 * for more details.
11 */
12#include <linux/init.h>
13#include <linux/platform_device.h>
14#include <linux/kernel.h>
15#include <linux/io.h>
16#include <asm/ilsel.h>
17
18static struct resource heartbeat_resources[] = {
19 [0] = {
20 .start = 0xb8140020,
21 .end = 0xb8140020,
22 .flags = IORESOURCE_MEM,
23 },
24};
25
26static struct platform_device heartbeat_device = {
27 .name = "heartbeat",
28 .id = -1,
29 .num_resources = ARRAY_SIZE(heartbeat_resources),
30 .resource = heartbeat_resources,
31};
32
33static struct resource smc91x_resources[] = {
34 [0] = {
35 .start = 0x18000300,
36 .end = 0x18000300 + 0x10 - 1,
37 .flags = IORESOURCE_MEM,
38 },
39 [1] = {
40 /* Filled in by ilsel */
41 .flags = IORESOURCE_IRQ,
42 },
43};
44
45static struct platform_device smc91x_device = {
46 .name = "smc91x",
47 .id = -1,
48 .resource = smc91x_resources,
49 .num_resources = ARRAY_SIZE(smc91x_resources),
50};
51
52static struct resource r8a66597_usb_host_resources[] = {
53 [0] = {
54 .name = "r8a66597_hcd",
55 .start = 0x18040000,
56 .end = 0x18080000 - 1,
57 .flags = IORESOURCE_MEM,
58 },
59 [1] = {
60 .name = "r8a66597_hcd",
61 /* Filled in by ilsel */
62 .flags = IORESOURCE_IRQ,
63 },
64};
65
66static struct platform_device r8a66597_usb_host_device = {
67 .name = "r8a66597_hcd",
68 .id = -1,
69 .dev = {
70 .dma_mask = NULL, /* don't use dma */
71 .coherent_dma_mask = 0xffffffff,
72 },
73 .num_resources = ARRAY_SIZE(r8a66597_usb_host_resources),
74 .resource = r8a66597_usb_host_resources,
75};
76
77static struct resource m66592_usb_peripheral_resources[] = {
78 [0] = {
79 .name = "m66592_udc",
80 .start = 0x18080000,
81 .end = 0x180c0000 - 1,
82 .flags = IORESOURCE_MEM,
83 },
84 [1] = {
85 .name = "m66592_udc",
86 /* Filled in by ilsel */
87 .flags = IORESOURCE_IRQ,
88 },
89};
90
91static struct platform_device m66592_usb_peripheral_device = {
92 .name = "m66592_udc",
93 .id = -1,
94 .dev = {
95 .dma_mask = NULL, /* don't use dma */
96 .coherent_dma_mask = 0xffffffff,
97 },
98 .num_resources = ARRAY_SIZE(m66592_usb_peripheral_resources),
99 .resource = m66592_usb_peripheral_resources,
100};
101
102static struct platform_device *x3proto_devices[] __initdata = {
103 &heartbeat_device,
104 &smc91x_device,
105 &r8a66597_usb_host_device,
106 &m66592_usb_peripheral_device,
107};
108
109static int __init x3proto_devices_setup(void)
110{
111 r8a66597_usb_host_resources[1].start =
112 r8a66597_usb_host_resources[1].end = ilsel_enable(ILSEL_USBH_I);
113
114 m66592_usb_peripheral_resources[1].start =
115 m66592_usb_peripheral_resources[1].end = ilsel_enable(ILSEL_USBP_I);
116
117 smc91x_resources[1].start =
118 smc91x_resources[1].end = ilsel_enable(ILSEL_LAN);
119
120 return platform_add_devices(x3proto_devices,
121 ARRAY_SIZE(x3proto_devices));
122}
123device_initcall(x3proto_devices_setup);
124
125static void __init x3proto_init_irq(void)
126{
127 plat_irq_setup_pins(IRQ_MODE_IRL3210);
128
129 /* Set ICR0.LVLMODE */
130 ctrl_outl(ctrl_inl(0xfe410000) | (1 << 21), 0xfe410000);
131}
132
133static struct sh_machine_vector mv_x3proto __initmv = {
134 .mv_name = "x3proto",
135 .mv_init_irq = x3proto_init_irq,
136};
generated by cgit v1.2.2 (git 2.25.0) at 2025-02-17 11:04:01 -0500