diff options
author | Andrew Victor <andrew@sanpeople.com> | 2007-05-11 16:01:28 -0400 |
---|---|---|
committer | Russell King <rmk+kernel@arm.linux.org.uk> | 2007-05-11 17:02:48 -0400 |
commit | c53c9cf60e49119e97d38390849cac5b2f0a0981 (patch) | |
tree | 37615dedbbd8980b8357df47d90843eb86d017ff /arch/arm/mach-ks8695 | |
parent | c42dcb3dcfd3a473ab7c79c2ae91fc1c2e4dc5db (diff) |
[ARM] 4331/3: Support for Micrel/Kendin KS8695 processor
Add core support for the Kendin/Micrel KS8695 processor family.
It is an ARM922-T based SoC with integrated USART, 4-port Ethernet
Switch, WAN Ethernet port, and optional PCI Host bridge, etc.
http://www.micrel.com/page.do?page=product-info/sys_on_chip.jsp
This patch is based on earlier patches from Lennert Buytenhek, Ben
Dooks and Greg Ungerer posted to the arm-linux-kernel mailing list in
March 2006; and Micrel's 2.6.9 port.
Signed-off-by: Andrew Victor <andrew@sanpeople.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Diffstat (limited to 'arch/arm/mach-ks8695')
-rw-r--r-- | arch/arm/mach-ks8695/Kconfig | 8 | ||||
-rw-r--r-- | arch/arm/mach-ks8695/Makefile | 14 | ||||
-rw-r--r-- | arch/arm/mach-ks8695/Makefile.boot | 8 | ||||
-rw-r--r-- | arch/arm/mach-ks8695/cpu.c | 73 | ||||
-rw-r--r-- | arch/arm/mach-ks8695/devices.c | 191 | ||||
-rw-r--r-- | arch/arm/mach-ks8695/generic.h | 15 | ||||
-rw-r--r-- | arch/arm/mach-ks8695/irq.c | 175 | ||||
-rw-r--r-- | arch/arm/mach-ks8695/time.c | 114 |
8 files changed, 598 insertions, 0 deletions
diff --git a/arch/arm/mach-ks8695/Kconfig b/arch/arm/mach-ks8695/Kconfig new file mode 100644 index 000000000000..44d14aa0baa7 --- /dev/null +++ b/arch/arm/mach-ks8695/Kconfig | |||
@@ -0,0 +1,8 @@ | |||
1 | if ARCH_KS8695 | ||
2 | |||
3 | menu "Kendin/Micrel KS8695 Implementations" | ||
4 | |||
5 | |||
6 | endmenu | ||
7 | |||
8 | endif | ||
diff --git a/arch/arm/mach-ks8695/Makefile b/arch/arm/mach-ks8695/Makefile new file mode 100644 index 000000000000..0a0f496e8ccf --- /dev/null +++ b/arch/arm/mach-ks8695/Makefile | |||
@@ -0,0 +1,14 @@ | |||
1 | # arch/arm/mach-ks8695/Makefile | ||
2 | # | ||
3 | # Makefile for KS8695 architecture support | ||
4 | # | ||
5 | |||
6 | obj-y := cpu.o irq.o time.o devices.o | ||
7 | obj-m := | ||
8 | obj-n := | ||
9 | obj- := | ||
10 | |||
11 | # PCI support is optional | ||
12 | #obj-$(CONFIG_PCI) += pci.o | ||
13 | |||
14 | # Board-specific support | ||
diff --git a/arch/arm/mach-ks8695/Makefile.boot b/arch/arm/mach-ks8695/Makefile.boot new file mode 100644 index 000000000000..48eb2cb3ac77 --- /dev/null +++ b/arch/arm/mach-ks8695/Makefile.boot | |||
@@ -0,0 +1,8 @@ | |||
1 | # Note: the following conditions must always be true: | ||
2 | # ZRELADDR == virt_to_phys(TEXTADDR) | ||
3 | # PARAMS_PHYS must be within 4MB of ZRELADDR | ||
4 | # INITRD_PHYS must be in RAM | ||
5 | |||
6 | zreladdr-y := 0x00008000 | ||
7 | params_phys-y := 0x00000100 | ||
8 | initrd_phys-y := 0x00800000 | ||
diff --git a/arch/arm/mach-ks8695/cpu.c b/arch/arm/mach-ks8695/cpu.c new file mode 100644 index 000000000000..407d255e42bf --- /dev/null +++ b/arch/arm/mach-ks8695/cpu.c | |||
@@ -0,0 +1,73 @@ | |||
1 | /* | ||
2 | * arch/arm/mach-ks8695/cpu.c | ||
3 | * | ||
4 | * Copyright (C) 2006 Ben Dooks <ben@simtec.co.uk> | ||
5 | * Copyright (C) 2006 Simtec Electronics | ||
6 | * | ||
7 | * KS8695 CPU support | ||
8 | * | ||
9 | * This program is free software; you can redistribute it and/or modify | ||
10 | * it under the terms of the GNU General Public License as published by | ||
11 | * the Free Software Foundation; either version 2 of the License, or | ||
12 | * (at your option) any later version. | ||
13 | * | ||
14 | * This program is distributed in the hope that it will be useful, | ||
15 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | ||
17 | * GNU General Public License for more details. | ||
18 | * | ||
19 | * You should have received a copy of the GNU General Public License | ||
20 | * along with this program; if not, write to the Free Software | ||
21 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | ||
22 | */ | ||
23 | |||
24 | #include <linux/kernel.h> | ||
25 | #include <linux/module.h> | ||
26 | #include <linux/init.h> | ||
27 | |||
28 | #include <asm/hardware.h> | ||
29 | #include <asm/io.h> | ||
30 | #include <asm/mach/arch.h> | ||
31 | #include <asm/mach/map.h> | ||
32 | |||
33 | #include <asm/arch/regs-sys.h> | ||
34 | #include <asm/arch/regs-misc.h> | ||
35 | |||
36 | |||
37 | static struct __initdata map_desc ks8695_io_desc[] = { | ||
38 | { | ||
39 | .virtual = KS8695_IO_VA, | ||
40 | .pfn = __phys_to_pfn(KS8695_IO_PA), | ||
41 | .length = KS8695_IO_SIZE, | ||
42 | .type = MT_DEVICE, | ||
43 | } | ||
44 | }; | ||
45 | |||
46 | static void __init ks8695_processor_info(void) | ||
47 | { | ||
48 | unsigned long id, rev; | ||
49 | |||
50 | id = __raw_readl(KS8695_MISC_VA + KS8695_DID); | ||
51 | rev = __raw_readl(KS8695_MISC_VA + KS8695_RID); | ||
52 | |||
53 | printk("KS8695 ID=%04lx SubID=%02lx Revision=%02lx\n", (id & DID_ID), (rev & RID_SUBID), (rev & RID_REVISION)); | ||
54 | } | ||
55 | |||
56 | static unsigned int sysclk[8] = { 125000000, 100000000, 62500000, 50000000, 41700000, 33300000, 31300000, 25000000 }; | ||
57 | static unsigned int cpuclk[8] = { 166000000, 166000000, 83000000, 83000000, 55300000, 55300000, 41500000, 41500000 }; | ||
58 | |||
59 | static void __init ks8695_clock_info(void) | ||
60 | { | ||
61 | unsigned int scdc = __raw_readl(KS8695_SYS_VA + KS8695_CLKCON) & CLKCON_SCDC; | ||
62 | |||
63 | printk("Clocks: System %u MHz, CPU %u MHz\n", | ||
64 | sysclk[scdc] / 1000000, cpuclk[scdc] / 1000000); | ||
65 | } | ||
66 | |||
67 | void __init ks8695_map_io(void) | ||
68 | { | ||
69 | iotable_init(ks8695_io_desc, ARRAY_SIZE(ks8695_io_desc)); | ||
70 | |||
71 | ks8695_processor_info(); | ||
72 | ks8695_clock_info(); | ||
73 | } | ||
diff --git a/arch/arm/mach-ks8695/devices.c b/arch/arm/mach-ks8695/devices.c new file mode 100644 index 000000000000..386593f8ac65 --- /dev/null +++ b/arch/arm/mach-ks8695/devices.c | |||
@@ -0,0 +1,191 @@ | |||
1 | /* | ||
2 | * arch/arm/mach-ks8695/devices.c | ||
3 | * | ||
4 | * Copyright (C) 2006 Andrew Victor | ||
5 | * | ||
6 | * This program is free software; you can redistribute it and/or modify | ||
7 | * it under the terms of the GNU General Public License as published by | ||
8 | * the Free Software Foundation. | ||
9 | * | ||
10 | * This program is distributed in the hope that it will be useful, | ||
11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | ||
13 | * GNU General Public License for more details. | ||
14 | * | ||
15 | * You should have received a copy of the GNU General Public License | ||
16 | * along with this program; if not, write to the Free Software | ||
17 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | ||
18 | */ | ||
19 | |||
20 | #include <asm/mach/arch.h> | ||
21 | #include <asm/mach/map.h> | ||
22 | |||
23 | #include <linux/platform_device.h> | ||
24 | |||
25 | #include <asm/arch/regs-wan.h> | ||
26 | #include <asm/arch/regs-lan.h> | ||
27 | #include <asm/arch/regs-hpna.h> | ||
28 | |||
29 | |||
30 | /* -------------------------------------------------------------------- | ||
31 | * Ethernet | ||
32 | * -------------------------------------------------------------------- */ | ||
33 | |||
34 | #if defined(CONFIG_ARM_KS8695_ETHER) || defined(CONFIG_ARM_KS8695_ETHER_MODULE) | ||
35 | static u64 eth_dmamask = 0xffffffffUL; | ||
36 | |||
37 | static struct resource ks8695_wan_resources[] = { | ||
38 | [0] = { | ||
39 | .start = KS8695_WAN_VA, | ||
40 | .end = KS8695_WAN_VA + 0x00ff, | ||
41 | .flags = IORESOURCE_MEM, | ||
42 | }, | ||
43 | [1] = { | ||
44 | .name = "WAN RX", | ||
45 | .start = KS8695_IRQ_WAN_RX_STATUS, | ||
46 | .end = KS8695_IRQ_WAN_RX_STATUS, | ||
47 | .flags = IORESOURCE_IRQ, | ||
48 | }, | ||
49 | [2] = { | ||
50 | .name = "WAN TX", | ||
51 | .start = KS8695_IRQ_WAN_TX_STATUS, | ||
52 | .end = KS8695_IRQ_WAN_TX_STATUS, | ||
53 | .flags = IORESOURCE_IRQ, | ||
54 | }, | ||
55 | [3] = { | ||
56 | .name = "WAN Link", | ||
57 | .start = KS8695_IRQ_WAN_LINK, | ||
58 | .end = KS8695_IRQ_WAN_LINK, | ||
59 | .flags = IORESOURCE_IRQ, | ||
60 | }, | ||
61 | }; | ||
62 | |||
63 | static struct platform_device ks8695_wan_device = { | ||
64 | .name = "ks8695_ether", | ||
65 | .id = 0, | ||
66 | .dev = { | ||
67 | .dma_mask = ð_dmamask, | ||
68 | .coherent_dma_mask = 0xffffffff, | ||
69 | }, | ||
70 | .resource = ks8695_wan_resources, | ||
71 | .num_resources = ARRAY_SIZE(ks8695_wan_resources), | ||
72 | }; | ||
73 | |||
74 | |||
75 | static struct resource ks8695_lan_resources[] = { | ||
76 | [0] = { | ||
77 | .start = KS8695_LAN_VA, | ||
78 | .end = KS8695_LAN_VA + 0x00ff, | ||
79 | .flags = IORESOURCE_MEM, | ||
80 | }, | ||
81 | [1] = { | ||
82 | .name = "LAN RX", | ||
83 | .start = KS8695_IRQ_LAN_RX_STATUS, | ||
84 | .end = KS8695_IRQ_LAN_RX_STATUS, | ||
85 | .flags = IORESOURCE_IRQ, | ||
86 | }, | ||
87 | [2] = { | ||
88 | .name = "LAN TX", | ||
89 | .start = KS8695_IRQ_LAN_TX_STATUS, | ||
90 | .end = KS8695_IRQ_LAN_TX_STATUS, | ||
91 | .flags = IORESOURCE_IRQ, | ||
92 | }, | ||
93 | }; | ||
94 | |||
95 | static struct platform_device ks8695_lan_device = { | ||
96 | .name = "ks8695_ether", | ||
97 | .id = 1, | ||
98 | .dev = { | ||
99 | .dma_mask = ð_dmamask, | ||
100 | .coherent_dma_mask = 0xffffffff, | ||
101 | }, | ||
102 | .resource = ks8695_lan_resources, | ||
103 | .num_resources = ARRAY_SIZE(ks8695_lan_resources), | ||
104 | }; | ||
105 | |||
106 | |||
107 | static struct resource ks8695_hpna_resources[] = { | ||
108 | [0] = { | ||
109 | .start = KS8695_HPNA_VA, | ||
110 | .end = KS8695_HPNA_VA + 0x00ff, | ||
111 | .flags = IORESOURCE_MEM, | ||
112 | }, | ||
113 | [1] = { | ||
114 | .name = "HPNA RX", | ||
115 | .start = KS8695_IRQ_HPNA_RX_STATUS, | ||
116 | .end = KS8695_IRQ_HPNA_RX_STATUS, | ||
117 | .flags = IORESOURCE_IRQ, | ||
118 | }, | ||
119 | [2] = { | ||
120 | .name = "HPNA TX", | ||
121 | .start = KS8695_IRQ_HPNA_TX_STATUS, | ||
122 | .end = KS8695_IRQ_HPNA_TX_STATUS, | ||
123 | .flags = IORESOURCE_IRQ, | ||
124 | }, | ||
125 | }; | ||
126 | |||
127 | static struct platform_device ks8695_hpna_device = { | ||
128 | .name = "ks8695_ether", | ||
129 | .id = 2, | ||
130 | .dev = { | ||
131 | .dma_mask = ð_dmamask, | ||
132 | .coherent_dma_mask = 0xffffffff, | ||
133 | }, | ||
134 | .resource = ks8695_hpna_resources, | ||
135 | .num_resources = ARRAY_SIZE(ks8695_hpna_resources), | ||
136 | }; | ||
137 | |||
138 | void __init ks8695_add_device_wan(void) | ||
139 | { | ||
140 | platform_device_register(&ks8695_wan_device); | ||
141 | } | ||
142 | |||
143 | void __init ks8695_add_device_lan(void) | ||
144 | { | ||
145 | platform_device_register(&ks8695_lan_device); | ||
146 | } | ||
147 | |||
148 | void __init ks8696_add_device_hpna(void) | ||
149 | { | ||
150 | platform_device_register(&ks8695_hpna_device); | ||
151 | } | ||
152 | #else | ||
153 | void __init ks8695_add_device_wan(void) {} | ||
154 | void __init ks8695_add_device_lan(void) {} | ||
155 | void __init ks8696_add_device_hpna(void) {} | ||
156 | #endif | ||
157 | |||
158 | |||
159 | /* -------------------------------------------------------------------- | ||
160 | * Watchdog | ||
161 | * -------------------------------------------------------------------- */ | ||
162 | |||
163 | #if defined(CONFIG_KS8695_WATCHDOG) || defined(CONFIG_KS8695_WATCHDOG_MODULE) | ||
164 | static struct platform_device ks8695_wdt_device = { | ||
165 | .name = "ks8695_wdt", | ||
166 | .id = -1, | ||
167 | .num_resources = 0, | ||
168 | }; | ||
169 | |||
170 | static void __init ks8695_add_device_watchdog(void) | ||
171 | { | ||
172 | platform_device_register(&ks8695_wdt_device); | ||
173 | } | ||
174 | #else | ||
175 | static void __init ks8695_add_device_watchdog(void) {} | ||
176 | #endif | ||
177 | |||
178 | |||
179 | /* -------------------------------------------------------------------- */ | ||
180 | |||
181 | /* | ||
182 | * These devices are always present and don't need any board-specific | ||
183 | * setup. | ||
184 | */ | ||
185 | static int __init ks8695_add_standard_devices(void) | ||
186 | { | ||
187 | ks8695_add_device_watchdog(); | ||
188 | return 0; | ||
189 | } | ||
190 | |||
191 | arch_initcall(ks8695_add_standard_devices); | ||
diff --git a/arch/arm/mach-ks8695/generic.h b/arch/arm/mach-ks8695/generic.h new file mode 100644 index 000000000000..2fbfab8d5fae --- /dev/null +++ b/arch/arm/mach-ks8695/generic.h | |||
@@ -0,0 +1,15 @@ | |||
1 | /* | ||
2 | * arch/arm/mach-ks8695/generic.h | ||
3 | * | ||
4 | * Copyright (C) 2006 Ben Dooks <ben@simtec.co.uk> | ||
5 | * Copyright (C) 2006 Simtec Electronics | ||
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 | ||
10 | * (at your option) any later version. | ||
11 | */ | ||
12 | |||
13 | extern __init void ks8695_map_io(void); | ||
14 | extern __init void ks8695_init_irq(void); | ||
15 | extern struct sys_timer ks8695_timer; | ||
diff --git a/arch/arm/mach-ks8695/irq.c b/arch/arm/mach-ks8695/irq.c new file mode 100644 index 000000000000..2407bba00547 --- /dev/null +++ b/arch/arm/mach-ks8695/irq.c | |||
@@ -0,0 +1,175 @@ | |||
1 | /* | ||
2 | * arch/arm/mach-ks8695/irq.c | ||
3 | * | ||
4 | * Copyright (C) 2006 Ben Dooks <ben@simtec.co.uk> | ||
5 | * Copyright (C) 2006 Simtec Electronics | ||
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 | ||
10 | * (at your option) any later version. | ||
11 | * | ||
12 | * This program is distributed in the hope that it will be useful, | ||
13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | ||
15 | * GNU General Public License for more details. | ||
16 | * | ||
17 | * You should have received a copy of the GNU General Public License | ||
18 | * along with this program; if not, write to the Free Software | ||
19 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | ||
20 | */ | ||
21 | |||
22 | #include <linux/init.h> | ||
23 | #include <linux/module.h> | ||
24 | #include <linux/interrupt.h> | ||
25 | #include <linux/ioport.h> | ||
26 | #include <linux/ptrace.h> | ||
27 | #include <linux/sysdev.h> | ||
28 | |||
29 | #include <asm/hardware.h> | ||
30 | #include <asm/irq.h> | ||
31 | #include <asm/io.h> | ||
32 | |||
33 | #include <asm/mach/irq.h> | ||
34 | |||
35 | #include <asm/arch/regs-irq.h> | ||
36 | #include <asm/arch/regs-gpio.h> | ||
37 | |||
38 | static void ks8695_irq_mask(unsigned int irqno) | ||
39 | { | ||
40 | unsigned long inten; | ||
41 | |||
42 | inten = __raw_readl(KS8695_IRQ_VA + KS8695_INTEN); | ||
43 | inten &= ~(1 << irqno); | ||
44 | |||
45 | __raw_writel(inten, KS8695_IRQ_VA + KS8695_INTEN); | ||
46 | } | ||
47 | |||
48 | static void ks8695_irq_unmask(unsigned int irqno) | ||
49 | { | ||
50 | unsigned long inten; | ||
51 | |||
52 | inten = __raw_readl(KS8695_IRQ_VA + KS8695_INTEN); | ||
53 | inten |= (1 << irqno); | ||
54 | |||
55 | __raw_writel(inten, KS8695_IRQ_VA + KS8695_INTEN); | ||
56 | } | ||
57 | |||
58 | static void ks8695_irq_ack(unsigned int irqno) | ||
59 | { | ||
60 | __raw_writel((1 << irqno), KS8695_IRQ_VA + KS8695_INTST); | ||
61 | } | ||
62 | |||
63 | |||
64 | static struct irq_chip ks8695_irq_level_chip; | ||
65 | static struct irq_chip ks8695_irq_edge_chip; | ||
66 | |||
67 | |||
68 | static int ks8695_irq_set_type(unsigned int irqno, unsigned int type) | ||
69 | { | ||
70 | unsigned long ctrl, mode; | ||
71 | unsigned short level_triggered = 0; | ||
72 | |||
73 | ctrl = __raw_readl(KS8695_GPIO_VA + KS8695_IOPC); | ||
74 | |||
75 | switch (type) { | ||
76 | case IRQT_HIGH: | ||
77 | mode = IOPC_TM_HIGH; | ||
78 | level_triggered = 1; | ||
79 | break; | ||
80 | case IRQT_LOW: | ||
81 | mode = IOPC_TM_LOW; | ||
82 | level_triggered = 1; | ||
83 | break; | ||
84 | case IRQT_RISING: | ||
85 | mode = IOPC_TM_RISING; | ||
86 | break; | ||
87 | case IRQT_FALLING: | ||
88 | mode = IOPC_TM_FALLING; | ||
89 | break; | ||
90 | case IRQT_BOTHEDGE: | ||
91 | mode = IOPC_TM_EDGE; | ||
92 | break; | ||
93 | default: | ||
94 | return -EINVAL; | ||
95 | } | ||
96 | |||
97 | switch (irqno) { | ||
98 | case KS8695_IRQ_EXTERN0: | ||
99 | ctrl &= ~IOPC_IOEINT0TM; | ||
100 | ctrl |= IOPC_IOEINT0_MODE(mode); | ||
101 | break; | ||
102 | case KS8695_IRQ_EXTERN1: | ||
103 | ctrl &= ~IOPC_IOEINT1TM; | ||
104 | ctrl |= IOPC_IOEINT1_MODE(mode); | ||
105 | break; | ||
106 | case KS8695_IRQ_EXTERN2: | ||
107 | ctrl &= ~IOPC_IOEINT2TM; | ||
108 | ctrl |= IOPC_IOEINT2_MODE(mode); | ||
109 | break; | ||
110 | case KS8695_IRQ_EXTERN3: | ||
111 | ctrl &= ~IOPC_IOEINT3TM; | ||
112 | ctrl |= IOPC_IOEINT3_MODE(mode); | ||
113 | break; | ||
114 | default: | ||
115 | return -EINVAL; | ||
116 | } | ||
117 | |||
118 | if (level_triggered) { | ||
119 | set_irq_chip(irqno, &ks8695_irq_level_chip); | ||
120 | set_irq_handler(irqno, handle_level_irq); | ||
121 | } | ||
122 | else { | ||
123 | set_irq_chip(irqno, &ks8695_irq_edge_chip); | ||
124 | set_irq_handler(irqno, handle_edge_irq); | ||
125 | } | ||
126 | |||
127 | __raw_writel(ctrl, KS8695_GPIO_VA + KS8695_IOPC); | ||
128 | return 0; | ||
129 | } | ||
130 | |||
131 | static struct irq_chip ks8695_irq_level_chip = { | ||
132 | .ack = ks8695_irq_mask, | ||
133 | .mask = ks8695_irq_mask, | ||
134 | .unmask = ks8695_irq_unmask, | ||
135 | .set_type = ks8695_irq_set_type, | ||
136 | }; | ||
137 | |||
138 | static struct irq_chip ks8695_irq_edge_chip = { | ||
139 | .ack = ks8695_irq_ack, | ||
140 | .mask = ks8695_irq_mask, | ||
141 | .unmask = ks8695_irq_unmask, | ||
142 | .set_type = ks8695_irq_set_type, | ||
143 | }; | ||
144 | |||
145 | void __init ks8695_init_irq(void) | ||
146 | { | ||
147 | unsigned int irq; | ||
148 | |||
149 | /* Disable all interrupts initially */ | ||
150 | __raw_writel(0, KS8695_IRQ_VA + KS8695_INTMC); | ||
151 | __raw_writel(0, KS8695_IRQ_VA + KS8695_INTEN); | ||
152 | |||
153 | for (irq = 0; irq < NR_IRQS; irq++) { | ||
154 | switch (irq) { | ||
155 | /* Level-triggered interrupts */ | ||
156 | case KS8695_IRQ_BUS_ERROR: | ||
157 | case KS8695_IRQ_UART_MODEM_STATUS: | ||
158 | case KS8695_IRQ_UART_LINE_STATUS: | ||
159 | case KS8695_IRQ_UART_RX: | ||
160 | case KS8695_IRQ_COMM_TX: | ||
161 | case KS8695_IRQ_COMM_RX: | ||
162 | set_irq_chip(irq, &ks8695_irq_level_chip); | ||
163 | set_irq_handler(irq, handle_level_irq); | ||
164 | break; | ||
165 | |||
166 | /* Edge-triggered interrupts */ | ||
167 | default: | ||
168 | ks8695_irq_ack(irq); /* clear pending bit */ | ||
169 | set_irq_chip(irq, &ks8695_irq_edge_chip); | ||
170 | set_irq_handler(irq, handle_edge_irq); | ||
171 | } | ||
172 | |||
173 | set_irq_flags(irq, IRQF_VALID); | ||
174 | } | ||
175 | } | ||
diff --git a/arch/arm/mach-ks8695/time.c b/arch/arm/mach-ks8695/time.c new file mode 100644 index 000000000000..d2c86e4a72eb --- /dev/null +++ b/arch/arm/mach-ks8695/time.c | |||
@@ -0,0 +1,114 @@ | |||
1 | /* | ||
2 | * arch/arm/mach-ks8695/time.c | ||
3 | * | ||
4 | * Copyright (C) 2006 Ben Dooks <ben@simtec.co.uk> | ||
5 | * Copyright (C) 2006 Simtec Electronics | ||
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 | ||
10 | * (at your option) any later version. | ||
11 | * | ||
12 | * This program is distributed in the hope that it will be useful, | ||
13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | ||
15 | * GNU General Public License for more details. | ||
16 | * | ||
17 | * You should have received a copy of the GNU General Public License | ||
18 | * along with this program; if not, write to the Free Software | ||
19 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | ||
20 | */ | ||
21 | |||
22 | #include <linux/init.h> | ||
23 | #include <linux/interrupt.h> | ||
24 | #include <linux/irq.h> | ||
25 | #include <linux/kernel.h> | ||
26 | #include <linux/sched.h> | ||
27 | |||
28 | #include <asm/io.h> | ||
29 | #include <asm/mach/time.h> | ||
30 | |||
31 | #include <asm/arch/regs-timer.h> | ||
32 | #include <asm/arch/regs-irq.h> | ||
33 | |||
34 | #include "generic.h" | ||
35 | |||
36 | /* | ||
37 | * Returns number of ms since last clock interrupt. Note that interrupts | ||
38 | * will have been disabled by do_gettimeoffset() | ||
39 | */ | ||
40 | static unsigned long ks8695_gettimeoffset (void) | ||
41 | { | ||
42 | unsigned long elapsed, tick2, intpending; | ||
43 | |||
44 | /* | ||
45 | * Get the current number of ticks. Note that there is a race | ||
46 | * condition between us reading the timer and checking for an | ||
47 | * interrupt. We solve this by ensuring that the counter has not | ||
48 | * reloaded between our two reads. | ||
49 | */ | ||
50 | elapsed = __raw_readl(KS8695_TMR_VA + KS8695_T1TC) + __raw_readl(KS8695_TMR_VA + KS8695_T1PD); | ||
51 | do { | ||
52 | tick2 = elapsed; | ||
53 | intpending = __raw_readl(KS8695_IRQ_VA + KS8695_INTST) & (1 << KS8695_IRQ_TIMER1); | ||
54 | elapsed = __raw_readl(KS8695_TMR_VA + KS8695_T1TC) + __raw_readl(KS8695_TMR_VA + KS8695_T1PD); | ||
55 | } while (elapsed > tick2); | ||
56 | |||
57 | /* Convert to number of ticks expired (not remaining) */ | ||
58 | elapsed = (CLOCK_TICK_RATE / HZ) - elapsed; | ||
59 | |||
60 | /* Is interrupt pending? If so, then timer has been reloaded already. */ | ||
61 | if (intpending) | ||
62 | elapsed += (CLOCK_TICK_RATE / HZ); | ||
63 | |||
64 | /* Convert ticks to usecs */ | ||
65 | return (unsigned long)(elapsed * (tick_nsec / 1000)) / LATCH; | ||
66 | } | ||
67 | |||
68 | /* | ||
69 | * IRQ handler for the timer. | ||
70 | */ | ||
71 | static irqreturn_t ks8695_timer_interrupt(int irq, void *dev_id) | ||
72 | { | ||
73 | write_seqlock(&xtime_lock); | ||
74 | timer_tick(); | ||
75 | write_sequnlock(&xtime_lock); | ||
76 | |||
77 | return IRQ_HANDLED; | ||
78 | } | ||
79 | |||
80 | static struct irqaction ks8695_timer_irq = { | ||
81 | .name = "ks8695_tick", | ||
82 | .flags = IRQF_DISABLED | IRQF_TIMER, | ||
83 | .handler = ks8695_timer_interrupt, | ||
84 | }; | ||
85 | |||
86 | static void ks8695_timer_setup(void) | ||
87 | { | ||
88 | unsigned long tmout = CLOCK_TICK_RATE / HZ; | ||
89 | unsigned long tmcon; | ||
90 | |||
91 | /* disable timer1 */ | ||
92 | tmcon = __raw_readl(KS8695_TMR_VA + KS8695_TMCON); | ||
93 | __raw_writel(tmcon & ~TMCON_T1EN, KS8695_TMR_VA + KS8695_TMCON); | ||
94 | |||
95 | __raw_writel(tmout / 2, KS8695_TMR_VA + KS8695_T1TC); | ||
96 | __raw_writel(tmout / 2, KS8695_TMR_VA + KS8695_T1PD); | ||
97 | |||
98 | /* re-enable timer1 */ | ||
99 | __raw_writel(tmcon | TMCON_T1EN, KS8695_TMR_VA + KS8695_TMCON); | ||
100 | } | ||
101 | |||
102 | static void __init ks8695_timer_init (void) | ||
103 | { | ||
104 | ks8695_timer_setup(); | ||
105 | |||
106 | /* Enable timer interrupts */ | ||
107 | setup_irq(KS8695_IRQ_TIMER1, &ks8695_timer_irq); | ||
108 | } | ||
109 | |||
110 | struct sys_timer ks8695_timer = { | ||
111 | .init = ks8695_timer_init, | ||
112 | .offset = ks8695_gettimeoffset, | ||
113 | .resume = ks8695_timer_setup, | ||
114 | }; | ||