aboutsummaryrefslogtreecommitdiffstats
path: root/arch/arm/mach-ep93xx
diff options
context:
space:
mode:
Diffstat (limited to 'arch/arm/mach-ep93xx')
-rw-r--r--arch/arm/mach-ep93xx/Kconfig21
-rw-r--r--arch/arm/mach-ep93xx/Makefile10
-rw-r--r--arch/arm/mach-ep93xx/Makefile.boot2
-rw-r--r--arch/arm/mach-ep93xx/core.c173
-rw-r--r--arch/arm/mach-ep93xx/gesbc9312.c40
-rw-r--r--arch/arm/mach-ep93xx/ts72xx.c118
6 files changed, 364 insertions, 0 deletions
diff --git a/arch/arm/mach-ep93xx/Kconfig b/arch/arm/mach-ep93xx/Kconfig
new file mode 100644
index 000000000000..cec5a21ca4e3
--- /dev/null
+++ b/arch/arm/mach-ep93xx/Kconfig
@@ -0,0 +1,21 @@
1if ARCH_EP93XX
2
3menu "Cirrus EP93xx Implementation Options"
4
5comment "EP93xx Platforms"
6
7config MACH_GESBC9312
8 bool "Support Glomation GESBC-9312-sx"
9 help
10 Say 'Y' here if you want your kernel to support the Glomation
11 GESBC-9312-sx board.
12
13config MACH_TS72XX
14 bool "Support Technologic Systems TS-72xx SBC"
15 help
16 Say 'Y' here if you want your kernel to support the
17 Technologic Systems TS-72xx board.
18
19endmenu
20
21endif
diff --git a/arch/arm/mach-ep93xx/Makefile b/arch/arm/mach-ep93xx/Makefile
new file mode 100644
index 000000000000..5393af989e94
--- /dev/null
+++ b/arch/arm/mach-ep93xx/Makefile
@@ -0,0 +1,10 @@
1#
2# Makefile for the linux kernel.
3#
4obj-y := core.o
5obj-m :=
6obj-n :=
7obj- :=
8
9obj-$(CONFIG_MACH_GESBC9312) += gesbc9312.o
10obj-$(CONFIG_MACH_TS72XX) += ts72xx.o
diff --git a/arch/arm/mach-ep93xx/Makefile.boot b/arch/arm/mach-ep93xx/Makefile.boot
new file mode 100644
index 000000000000..d5561ad15bad
--- /dev/null
+++ b/arch/arm/mach-ep93xx/Makefile.boot
@@ -0,0 +1,2 @@
1 zreladdr-y := 0x00008000
2params_phys-y := 0x00000100
diff --git a/arch/arm/mach-ep93xx/core.c b/arch/arm/mach-ep93xx/core.c
new file mode 100644
index 000000000000..f831f74dc8cc
--- /dev/null
+++ b/arch/arm/mach-ep93xx/core.c
@@ -0,0 +1,173 @@
1/*
2 * arch/arm/mach-ep93xx/core.c
3 * Core routines for Cirrus EP93xx chips.
4 *
5 * Copyright (C) 2006 Lennert Buytenhek <buytenh@wantstofly.org>
6 *
7 * Thanks go to Michael Burian and Ray Lehtiniemi for their key
8 * role in the ep93xx linux community.
9 *
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License as published by
12 * the Free Software Foundation; either version 2 of the License, or (at
13 * your option) any later version.
14 */
15
16#include <linux/config.h>
17#include <linux/kernel.h>
18#include <linux/init.h>
19#include <linux/spinlock.h>
20#include <linux/sched.h>
21#include <linux/interrupt.h>
22#include <linux/serial.h>
23#include <linux/tty.h>
24#include <linux/bitops.h>
25#include <linux/serial.h>
26#include <linux/serial_8250.h>
27#include <linux/serial_core.h>
28#include <linux/device.h>
29#include <linux/mm.h>
30#include <linux/time.h>
31#include <linux/timex.h>
32#include <linux/delay.h>
33#include <linux/amba/bus.h>
34
35#include <asm/types.h>
36#include <asm/setup.h>
37#include <asm/memory.h>
38#include <asm/hardware.h>
39#include <asm/irq.h>
40#include <asm/system.h>
41#include <asm/tlbflush.h>
42#include <asm/pgtable.h>
43#include <asm/io.h>
44
45#include <asm/mach/map.h>
46#include <asm/mach/time.h>
47#include <asm/mach/irq.h>
48
49#include <asm/hardware/vic.h>
50
51
52/*************************************************************************
53 * Static I/O mappings that are needed for all EP93xx platforms
54 *************************************************************************/
55static struct map_desc ep93xx_io_desc[] __initdata = {
56 {
57 .virtual = EP93XX_AHB_VIRT_BASE,
58 .pfn = __phys_to_pfn(EP93XX_AHB_PHYS_BASE),
59 .length = EP93XX_AHB_SIZE,
60 .type = MT_DEVICE,
61 }, {
62 .virtual = EP93XX_APB_VIRT_BASE,
63 .pfn = __phys_to_pfn(EP93XX_APB_PHYS_BASE),
64 .length = EP93XX_APB_SIZE,
65 .type = MT_DEVICE,
66 },
67};
68
69void __init ep93xx_map_io(void)
70{
71 iotable_init(ep93xx_io_desc, ARRAY_SIZE(ep93xx_io_desc));
72}
73
74
75/*************************************************************************
76 * Timer handling for EP93xx
77 *************************************************************************
78 * The ep93xx has four internal timers. Timers 1, 2 (both 16 bit) and
79 * 3 (32 bit) count down at 508 kHz, are self-reloading, and can generate
80 * an interrupt on underflow. Timer 4 (40 bit) counts down at 983.04 kHz,
81 * is free-running, and can't generate interrupts.
82 *
83 * The 508 kHz timers are ideal for use for the timer interrupt, as the
84 * most common values of HZ divide 508 kHz nicely. We pick one of the 16
85 * bit timers (timer 1) since we don't need more than 16 bits of reload
86 * value as long as HZ >= 8.
87 *
88 * The higher clock rate of timer 4 makes it a better choice than the
89 * other timers for use in gettimeoffset(), while the fact that it can't
90 * generate interrupts means we don't have to worry about not being able
91 * to use this timer for something else. We also use timer 4 for keeping
92 * track of lost jiffies.
93 */
94static unsigned int last_jiffy_time;
95
96#define TIMER4_TICKS_PER_JIFFY ((CLOCK_TICK_RATE + (HZ/2)) / HZ)
97
98static int ep93xx_timer_interrupt(int irq, void *dev_id, struct pt_regs *regs)
99{
100 write_seqlock(&xtime_lock);
101
102 __raw_writel(1, EP93XX_TIMER1_CLEAR);
103 while (__raw_readl(EP93XX_TIMER4_VALUE_LOW) - last_jiffy_time
104 >= TIMER4_TICKS_PER_JIFFY) {
105 last_jiffy_time += TIMER4_TICKS_PER_JIFFY;
106 timer_tick(regs);
107 }
108
109 write_sequnlock(&xtime_lock);
110
111 return IRQ_HANDLED;
112}
113
114static struct irqaction ep93xx_timer_irq = {
115 .name = "ep93xx timer",
116 .flags = SA_INTERRUPT | SA_TIMER,
117 .handler = ep93xx_timer_interrupt,
118};
119
120static void __init ep93xx_timer_init(void)
121{
122 /* Enable periodic HZ timer. */
123 __raw_writel(0x48, EP93XX_TIMER1_CONTROL);
124 __raw_writel((508000 / HZ) - 1, EP93XX_TIMER1_LOAD);
125 __raw_writel(0xc8, EP93XX_TIMER1_CONTROL);
126
127 /* Enable lost jiffy timer. */
128 __raw_writel(0x100, EP93XX_TIMER4_VALUE_HIGH);
129
130 setup_irq(IRQ_EP93XX_TIMER1, &ep93xx_timer_irq);
131}
132
133static unsigned long ep93xx_gettimeoffset(void)
134{
135 int offset;
136
137 offset = __raw_readl(EP93XX_TIMER4_VALUE_LOW) - last_jiffy_time;
138
139 /* Calculate (1000000 / 983040) * offset. */
140 return offset + (53 * offset / 3072);
141}
142
143struct sys_timer ep93xx_timer = {
144 .init = ep93xx_timer_init,
145 .offset = ep93xx_gettimeoffset,
146};
147
148
149/*************************************************************************
150 * EP93xx IRQ handling
151 *************************************************************************/
152void __init ep93xx_init_irq(void)
153{
154 vic_init((void *)EP93XX_VIC1_BASE, 0, EP93XX_VIC1_VALID_IRQ_MASK);
155 vic_init((void *)EP93XX_VIC2_BASE, 32, EP93XX_VIC2_VALID_IRQ_MASK);
156}
157
158
159/*************************************************************************
160 * EP93xx peripheral handling
161 *************************************************************************/
162void __init ep93xx_init_devices(void)
163{
164 unsigned int v;
165
166 /*
167 * Disallow access to MaverickCrunch initially.
168 */
169 v = __raw_readl(EP93XX_SYSCON_DEVICE_CONFIG);
170 v &= ~EP93XX_SYSCON_DEVICE_CONFIG_CRUNCH_ENABLE;
171 __raw_writel(0xaa, EP93XX_SYSCON_SWLOCK);
172 __raw_writel(v, EP93XX_SYSCON_DEVICE_CONFIG);
173}
diff --git a/arch/arm/mach-ep93xx/gesbc9312.c b/arch/arm/mach-ep93xx/gesbc9312.c
new file mode 100644
index 000000000000..d18fcb1a2f1b
--- /dev/null
+++ b/arch/arm/mach-ep93xx/gesbc9312.c
@@ -0,0 +1,40 @@
1/*
2 * arch/arm/mach-ep93xx/gesbc9312.c
3 * Glomation GESBC-9312-sx support.
4 *
5 * Copyright (C) 2006 Lennert Buytenhek <buytenh@wantstofly.org>
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 2 of the License, or (at
10 * your option) any later version.
11 */
12
13#include <linux/config.h>
14#include <linux/kernel.h>
15#include <linux/init.h>
16#include <linux/mm.h>
17#include <linux/sched.h>
18#include <linux/interrupt.h>
19#include <linux/mtd/physmap.h>
20#include <asm/io.h>
21#include <asm/hardware.h>
22#include <asm/mach-types.h>
23#include <asm/mach/arch.h>
24
25static void __init gesbc9312_init_machine(void)
26{
27 ep93xx_init_devices();
28 physmap_configure(0x60000000, 0x00800000, 4, NULL);
29}
30
31MACHINE_START(GESBC9312, "Glomation GESBC-9312-sx")
32 /* Maintainer: Lennert Buytenhek <buytenh@wantstofly.org> */
33 .phys_io = EP93XX_APB_PHYS_BASE,
34 .io_pg_offst = ((EP93XX_APB_VIRT_BASE) >> 18) & 0xfffc,
35 .boot_params = 0x00000100,
36 .map_io = ep93xx_map_io,
37 .init_irq = ep93xx_init_irq,
38 .timer = &ep93xx_timer,
39 .init_machine = gesbc9312_init_machine,
40MACHINE_END
diff --git a/arch/arm/mach-ep93xx/ts72xx.c b/arch/arm/mach-ep93xx/ts72xx.c
new file mode 100644
index 000000000000..777e75daa8a5
--- /dev/null
+++ b/arch/arm/mach-ep93xx/ts72xx.c
@@ -0,0 +1,118 @@
1/*
2 * arch/arm/mach-ep93xx/ts72xx.c
3 * Technologic Systems TS72xx SBC support.
4 *
5 * Copyright (C) 2006 Lennert Buytenhek <buytenh@wantstofly.org>
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 2 of the License, or (at
10 * your option) any later version.
11 */
12
13#include <linux/config.h>
14#include <linux/kernel.h>
15#include <linux/init.h>
16#include <linux/mm.h>
17#include <linux/sched.h>
18#include <linux/interrupt.h>
19#include <linux/mtd/physmap.h>
20#include <asm/io.h>
21#include <asm/hardware.h>
22#include <asm/mach-types.h>
23#include <asm/mach/arch.h>
24#include <asm/mach/map.h>
25
26static struct map_desc ts72xx_io_desc[] __initdata = {
27 {
28 .virtual = TS72XX_MODEL_VIRT_BASE,
29 .pfn = __phys_to_pfn(TS72XX_MODEL_PHYS_BASE),
30 .length = TS72XX_MODEL_SIZE,
31 .type = MT_DEVICE,
32 }, {
33 .virtual = TS72XX_OPTIONS_VIRT_BASE,
34 .pfn = __phys_to_pfn(TS72XX_OPTIONS_PHYS_BASE),
35 .length = TS72XX_OPTIONS_SIZE,
36 .type = MT_DEVICE,
37 }, {
38 .virtual = TS72XX_OPTIONS2_VIRT_BASE,
39 .pfn = __phys_to_pfn(TS72XX_OPTIONS2_PHYS_BASE),
40 .length = TS72XX_OPTIONS2_SIZE,
41 .type = MT_DEVICE,
42 }
43};
44
45static struct map_desc ts72xx_nand_io_desc[] __initdata = {
46 {
47 .virtual = TS72XX_NAND_DATA_VIRT_BASE,
48 .pfn = __phys_to_pfn(TS72XX_NAND1_DATA_PHYS_BASE),
49 .length = TS72XX_NAND_DATA_SIZE,
50 .type = MT_DEVICE,
51 }, {
52 .virtual = TS72XX_NAND_CONTROL_VIRT_BASE,
53 .pfn = __phys_to_pfn(TS72XX_NAND1_CONTROL_PHYS_BASE),
54 .length = TS72XX_NAND_CONTROL_SIZE,
55 .type = MT_DEVICE,
56 }, {
57 .virtual = TS72XX_NAND_BUSY_VIRT_BASE,
58 .pfn = __phys_to_pfn(TS72XX_NAND1_BUSY_PHYS_BASE),
59 .length = TS72XX_NAND_BUSY_SIZE,
60 .type = MT_DEVICE,
61 }
62};
63
64static struct map_desc ts72xx_alternate_nand_io_desc[] __initdata = {
65 {
66 .virtual = TS72XX_NAND_DATA_VIRT_BASE,
67 .pfn = __phys_to_pfn(TS72XX_NAND2_DATA_PHYS_BASE),
68 .length = TS72XX_NAND_DATA_SIZE,
69 .type = MT_DEVICE,
70 }, {
71 .virtual = TS72XX_NAND_CONTROL_VIRT_BASE,
72 .pfn = __phys_to_pfn(TS72XX_NAND2_CONTROL_PHYS_BASE),
73 .length = TS72XX_NAND_CONTROL_SIZE,
74 .type = MT_DEVICE,
75 }, {
76 .virtual = TS72XX_NAND_BUSY_VIRT_BASE,
77 .pfn = __phys_to_pfn(TS72XX_NAND2_BUSY_PHYS_BASE),
78 .length = TS72XX_NAND_BUSY_SIZE,
79 .type = MT_DEVICE,
80 }
81};
82
83static void __init ts72xx_map_io(void)
84{
85 ep93xx_map_io();
86 iotable_init(ts72xx_io_desc, ARRAY_SIZE(ts72xx_io_desc));
87
88 /*
89 * The TS-7200 has NOR flash, the other models have NAND flash.
90 */
91 if (!board_is_ts7200()) {
92 if (is_ts9420_installed()) {
93 iotable_init(ts72xx_alternate_nand_io_desc,
94 ARRAY_SIZE(ts72xx_alternate_nand_io_desc));
95 } else {
96 iotable_init(ts72xx_nand_io_desc,
97 ARRAY_SIZE(ts72xx_nand_io_desc));
98 }
99 }
100}
101
102static void __init ts72xx_init_machine(void)
103{
104 ep93xx_init_devices();
105 if (board_is_ts7200())
106 physmap_configure(TS72XX_NOR_PHYS_BASE, 0x01000000, 1, NULL);
107}
108
109MACHINE_START(TS72XX, "Technologic Systems TS-72xx SBC")
110 /* Maintainer: Lennert Buytenhek <buytenh@wantstofly.org> */
111 .phys_io = EP93XX_APB_PHYS_BASE,
112 .io_pg_offst = ((EP93XX_APB_VIRT_BASE) >> 18) & 0xfffc,
113 .boot_params = 0x00000100,
114 .map_io = ts72xx_map_io,
115 .init_irq = ep93xx_init_irq,
116 .timer = &ep93xx_timer,
117 .init_machine = ts72xx_init_machine,
118MACHINE_END
generated by cgit v1.2.2 (git 2.25.0) at 2024-10-05 08:16:57 -0400