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-rw-r--r--arch/arm/Kconfig8
-rw-r--r--arch/arm/Makefile1
-rw-r--r--arch/arm/mach-gemini/Kconfig12
-rw-r--r--arch/arm/mach-gemini/Makefile7
-rw-r--r--arch/arm/mach-gemini/Makefile.boot9
-rw-r--r--arch/arm/mach-gemini/common.h27
-rw-r--r--arch/arm/mach-gemini/devices.c92
-rw-r--r--arch/arm/mach-gemini/include/mach/debug-macro.S23
-rw-r--r--arch/arm/mach-gemini/include/mach/entry-macro.S39
-rw-r--r--arch/arm/mach-gemini/include/mach/global_reg.h278
-rw-r--r--arch/arm/mach-gemini/include/mach/hardware.h75
-rw-r--r--arch/arm/mach-gemini/include/mach/io.h18
-rw-r--r--arch/arm/mach-gemini/include/mach/irqs.h50
-rw-r--r--arch/arm/mach-gemini/include/mach/memory.h19
-rw-r--r--arch/arm/mach-gemini/include/mach/system.h37
-rw-r--r--arch/arm/mach-gemini/include/mach/timex.h13
-rw-r--r--arch/arm/mach-gemini/include/mach/uncompress.h42
-rw-r--r--arch/arm/mach-gemini/include/mach/vmalloc.h10
-rw-r--r--arch/arm/mach-gemini/irq.c102
-rw-r--r--arch/arm/mach-gemini/mm.c82
-rw-r--r--arch/arm/mach-gemini/time.c89
21 files changed, 1033 insertions, 0 deletions
diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index dbfdf87f993f..5686f4074dd0 100644
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -275,6 +275,12 @@ config ARCH_EP93XX
275 help 275 help
276 This enables support for the Cirrus EP93xx series of CPUs. 276 This enables support for the Cirrus EP93xx series of CPUs.
277 277
278config ARCH_GEMINI
279 bool "Cortina Systems Gemini"
280 select CPU_FA526
281 help
282 Support for the Cortina Systems Gemini family SoCs
283
278config ARCH_FOOTBRIDGE 284config ARCH_FOOTBRIDGE
279 bool "FootBridge" 285 bool "FootBridge"
280 select CPU_SA110 286 select CPU_SA110
@@ -598,6 +604,8 @@ source "arch/arm/mach-ep93xx/Kconfig"
598 604
599source "arch/arm/mach-footbridge/Kconfig" 605source "arch/arm/mach-footbridge/Kconfig"
600 606
607source "arch/arm/mach-gemini/Kconfig"
608
601source "arch/arm/mach-integrator/Kconfig" 609source "arch/arm/mach-integrator/Kconfig"
602 610
603source "arch/arm/mach-iop32x/Kconfig" 611source "arch/arm/mach-iop32x/Kconfig"
diff --git a/arch/arm/Makefile b/arch/arm/Makefile
index d29f9260fb1c..56e13bf22027 100644
--- a/arch/arm/Makefile
+++ b/arch/arm/Makefile
@@ -108,6 +108,7 @@ endif
108 machine-$(CONFIG_ARCH_PXA) := pxa 108 machine-$(CONFIG_ARCH_PXA) := pxa
109 machine-$(CONFIG_ARCH_L7200) := l7200 109 machine-$(CONFIG_ARCH_L7200) := l7200
110 machine-$(CONFIG_ARCH_INTEGRATOR) := integrator 110 machine-$(CONFIG_ARCH_INTEGRATOR) := integrator
111 machine-$(CONFIG_ARCH_GEMINI) := gemini
111 textofs-$(CONFIG_ARCH_CLPS711X) := 0x00028000 112 textofs-$(CONFIG_ARCH_CLPS711X) := 0x00028000
112 machine-$(CONFIG_ARCH_CLPS711X) := clps711x 113 machine-$(CONFIG_ARCH_CLPS711X) := clps711x
113 machine-$(CONFIG_ARCH_IOP32X) := iop32x 114 machine-$(CONFIG_ARCH_IOP32X) := iop32x
diff --git a/arch/arm/mach-gemini/Kconfig b/arch/arm/mach-gemini/Kconfig
new file mode 100644
index 000000000000..3aff39abb188
--- /dev/null
+++ b/arch/arm/mach-gemini/Kconfig
@@ -0,0 +1,12 @@
1if ARCH_GEMINI
2
3menu "Cortina Systems Gemini Implementations"
4
5endmenu
6
7config GEMINI_MEM_SWAP
8 bool "Gemini memory is swapped"
9 help
10 Say Y here if Gemini memory is swapped by bootloader.
11
12endif
diff --git a/arch/arm/mach-gemini/Makefile b/arch/arm/mach-gemini/Makefile
new file mode 100644
index 000000000000..133e2050685e
--- /dev/null
+++ b/arch/arm/mach-gemini/Makefile
@@ -0,0 +1,7 @@
1#
2# Makefile for the linux kernel.
3#
4
5# Object file lists.
6
7obj-y := irq.o mm.o time.o devices.o
diff --git a/arch/arm/mach-gemini/Makefile.boot b/arch/arm/mach-gemini/Makefile.boot
new file mode 100644
index 000000000000..22a52c228d93
--- /dev/null
+++ b/arch/arm/mach-gemini/Makefile.boot
@@ -0,0 +1,9 @@
1ifeq ($(CONFIG_GEMINI_MEM_SWAP),y)
2 zreladdr-y := 0x00008000
3params_phys-y := 0x00000100
4initrd_phys-y := 0x00800000
5else
6 zreladdr-y := 0x10008000
7params_phys-y := 0x10000100
8initrd_phys-y := 0x10800000
9endif
diff --git a/arch/arm/mach-gemini/common.h b/arch/arm/mach-gemini/common.h
new file mode 100644
index 000000000000..9c1afa1c5803
--- /dev/null
+++ b/arch/arm/mach-gemini/common.h
@@ -0,0 +1,27 @@
1/*
2 * Common Gemini architecture functions
3 *
4 * Copyright (C) 2008-2009 Paulius Zaleckas <paulius.zaleckas@teltonika.lt>
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; either version 2 of the License, or
9 * (at your option) any later version.
10 */
11
12#ifndef __GEMINI_COMMON_H__
13#define __GEMINI_COMMON_H__
14
15struct mtd_partition;
16
17extern void gemini_map_io(void);
18extern void gemini_init_irq(void);
19extern void gemini_timer_init(void);
20
21/* Common platform devices registration functions */
22extern int platform_register_uart(void);
23extern int platform_register_pflash(unsigned int size,
24 struct mtd_partition *parts,
25 unsigned int nr_parts);
26
27#endif /* __GEMINI_COMMON_H__ */
diff --git a/arch/arm/mach-gemini/devices.c b/arch/arm/mach-gemini/devices.c
new file mode 100644
index 000000000000..6b525253d027
--- /dev/null
+++ b/arch/arm/mach-gemini/devices.c
@@ -0,0 +1,92 @@
1/*
2 * Common devices definition for Gemini
3 *
4 * Copyright (C) 2008-2009 Paulius Zaleckas <paulius.zaleckas@teltonika.lt>
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 version 2 as
8 * published by the Free Software Foundation.
9 */
10#include <linux/kernel.h>
11#include <linux/init.h>
12#include <linux/io.h>
13#include <linux/platform_device.h>
14#include <linux/serial_8250.h>
15#include <linux/mtd/physmap.h>
16
17#include <mach/irqs.h>
18#include <mach/hardware.h>
19#include <mach/global_reg.h>
20
21static struct plat_serial8250_port serial_platform_data[] = {
22 {
23 .membase = (void *)IO_ADDRESS(GEMINI_UART_BASE),
24 .mapbase = GEMINI_UART_BASE,
25 .irq = IRQ_UART,
26 .uartclk = UART_CLK,
27 .regshift = 2,
28 .iotype = UPIO_MEM,
29 .type = PORT_16550A,
30 .flags = UPF_BOOT_AUTOCONF | UPF_SKIP_TEST | UPF_FIXED_TYPE,
31 },
32 {},
33};
34
35static struct platform_device serial_device = {
36 .name = "serial8250",
37 .id = PLAT8250_DEV_PLATFORM,
38 .dev = {
39 .platform_data = serial_platform_data,
40 },
41};
42
43int platform_register_uart(void)
44{
45 return platform_device_register(&serial_device);
46}
47
48static struct resource flash_resource = {
49 .start = GEMINI_FLASH_BASE,
50 .flags = IORESOURCE_MEM,
51};
52
53static struct physmap_flash_data pflash_platform_data = {};
54
55static struct platform_device pflash_device = {
56 .name = "physmap-flash",
57 .id = 0,
58 .dev = {
59 .platform_data = &pflash_platform_data,
60 },
61 .resource = &flash_resource,
62 .num_resources = 1,
63};
64
65int platform_register_pflash(unsigned int size, struct mtd_partition *parts,
66 unsigned int nr_parts)
67{
68 unsigned int reg;
69
70 reg = __raw_readl(IO_ADDRESS(GEMINI_GLOBAL_BASE) + GLOBAL_STATUS);
71
72 if ((reg & FLASH_TYPE_MASK) != FLASH_TYPE_PARALLEL)
73 return -ENXIO;
74
75 if (reg & FLASH_WIDTH_16BIT)
76 pflash_platform_data.width = 2;
77 else
78 pflash_platform_data.width = 1;
79
80 /* enable parallel flash pins and disable others */
81 reg = __raw_readl(IO_ADDRESS(GEMINI_GLOBAL_BASE) + GLOBAL_MISC_CTRL);
82 reg &= ~PFLASH_PADS_DISABLE;
83 reg |= SFLASH_PADS_DISABLE | NAND_PADS_DISABLE;
84 __raw_writel(reg, IO_ADDRESS(GEMINI_GLOBAL_BASE) + GLOBAL_MISC_CTRL);
85
86 flash_resource.end = flash_resource.start + size - 1;
87
88 pflash_platform_data.parts = parts;
89 pflash_platform_data.nr_parts = nr_parts;
90
91 return platform_device_register(&pflash_device);
92}
diff --git a/arch/arm/mach-gemini/include/mach/debug-macro.S b/arch/arm/mach-gemini/include/mach/debug-macro.S
new file mode 100644
index 000000000000..d04a6eaeae14
--- /dev/null
+++ b/arch/arm/mach-gemini/include/mach/debug-macro.S
@@ -0,0 +1,23 @@
1/*
2 * Debugging macro include header
3 *
4 * Copyright (C) 1994-1999 Russell King
5 * Copyright (C) 2001-2006 Storlink, Corp.
6 * Copyright (C) 2008-2009 Paulius Zaleckas <paulius.zaleckas@teltonika.lt>
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License version 2 as
10 * published by the Free Software Foundation.
11 */
12#include <mach/hardware.h>
13
14 .macro addruart,rx
15 mrc p15, 0, \rx, c1, c0
16 tst \rx, #1 @ MMU enabled?
17 ldreq \rx, =GEMINI_UART_BASE @ physical
18 ldrne \rx, =IO_ADDRESS(GEMINI_UART_BASE) @ virtual
19 .endm
20
21#define UART_SHIFT 2
22#define FLOW_CONTROL
23#include <asm/hardware/debug-8250.S>
diff --git a/arch/arm/mach-gemini/include/mach/entry-macro.S b/arch/arm/mach-gemini/include/mach/entry-macro.S
new file mode 100644
index 000000000000..1624f91a2b8b
--- /dev/null
+++ b/arch/arm/mach-gemini/include/mach/entry-macro.S
@@ -0,0 +1,39 @@
1/*
2 * Low-level IRQ helper macros for Gemini platform.
3 *
4 * Copyright (C) 2001-2006 Storlink, Corp.
5 * Copyright (C) 2008-2009 Paulius Zaleckas <paulius.zaleckas@teltonika.lt>
6 *
7 * This file is licensed under the terms of the GNU General Public
8 * License version 2. This program is licensed "as is" without any
9 * warranty of any kind, whether express or implied.
10 */
11#include <mach/hardware.h>
12
13#define IRQ_STATUS 0x14
14
15 .macro disable_fiq
16 .endm
17
18 .macro get_irqnr_preamble, base, tmp
19 .endm
20
21 .macro arch_ret_to_user, tmp1, tmp2
22 .endm
23
24 .macro get_irqnr_and_base, irqnr, irqstat, base, tmp
25 ldr \irqstat, =IO_ADDRESS(GEMINI_INTERRUPT_BASE + IRQ_STATUS)
26 ldr \irqnr, [\irqstat]
27 cmp \irqnr, #0
28 beq 2313f
29 mov \tmp, \irqnr
30 mov \irqnr, #0
312312:
32 tst \tmp, #1
33 bne 2313f
34 add \irqnr, \irqnr, #1
35 mov \tmp, \tmp, lsr #1
36 cmp \irqnr, #31
37 bcc 2312b
382313:
39 .endm
diff --git a/arch/arm/mach-gemini/include/mach/global_reg.h b/arch/arm/mach-gemini/include/mach/global_reg.h
new file mode 100644
index 000000000000..de7ff7e849fc
--- /dev/null
+++ b/arch/arm/mach-gemini/include/mach/global_reg.h
@@ -0,0 +1,278 @@
1/*
2 * This file contains the hardware definitions for Gemini.
3 *
4 * Copyright (C) 2009 Paulius Zaleckas <paulius.zaleckas@teltonika.lt>
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; either version 2 of the License, or
9 * (at your option) any later version.
10 */
11#ifndef __MACH_GLOBAL_REG_H
12#define __MACH_GLOBAL_REG_H
13
14/* Global Word ID Register*/
15#define GLOBAL_ID 0x00
16
17#define CHIP_ID(reg) ((reg) >> 8)
18#define CHIP_REVISION(reg) ((reg) & 0xFF)
19
20/* Global Status Register */
21#define GLOBAL_STATUS 0x04
22
23#define CPU_BIG_ENDIAN (1 << 31)
24#define PLL_OSC_30M (1 << 30) /* else 60MHz */
25
26#define OPERATION_MODE_MASK (0xF << 26)
27#define OPM_IDDQ (0xF << 26)
28#define OPM_NAND (0xE << 26)
29#define OPM_RING (0xD << 26)
30#define OPM_DIRECT_BOOT (0xC << 26)
31#define OPM_USB1_PHY_TEST (0xB << 26)
32#define OPM_USB0_PHY_TEST (0xA << 26)
33#define OPM_SATA1_PHY_TEST (0x9 << 26)
34#define OPM_SATA0_PHY_TEST (0x8 << 26)
35#define OPM_ICE_ARM (0x7 << 26)
36#define OPM_ICE_FARADAY (0x6 << 26)
37#define OPM_PLL_BYPASS (0x5 << 26)
38#define OPM_DEBUG (0x4 << 26)
39#define OPM_BURN_IN (0x3 << 26)
40#define OPM_MBIST (0x2 << 26)
41#define OPM_SCAN (0x1 << 26)
42#define OPM_REAL (0x0 << 26)
43
44#define FLASH_TYPE_MASK (0x3 << 24)
45#define FLASH_TYPE_NAND_2K (0x3 << 24)
46#define FLASH_TYPE_NAND_512 (0x2 << 24)
47#define FLASH_TYPE_PARALLEL (0x1 << 24)
48#define FLASH_TYPE_SERIAL (0x0 << 24)
49/* if parallel */
50#define FLASH_WIDTH_16BIT (1 << 23) /* else 8 bit */
51/* if serial */
52#define FLASH_ATMEL (1 << 23) /* else STM */
53
54#define FLASH_SIZE_MASK (0x3 << 21)
55#define NAND_256M (0x3 << 21) /* and more */
56#define NAND_128M (0x2 << 21)
57#define NAND_64M (0x1 << 21)
58#define NAND_32M (0x0 << 21)
59#define ATMEL_16M (0x3 << 21) /* and more */
60#define ATMEL_8M (0x2 << 21)
61#define ATMEL_4M_2M (0x1 << 21)
62#define ATMEL_1M (0x0 << 21) /* and less */
63#define STM_32M (1 << 22) /* and more */
64#define STM_16M (0 << 22) /* and less */
65
66#define FLASH_PARALLEL_HIGH_PIN_CNT (1 << 20) /* else low pin cnt */
67
68#define CPU_AHB_RATIO_MASK (0x3 << 18)
69#define CPU_AHB_1_1 (0x0 << 18)
70#define CPU_AHB_3_2 (0x1 << 18)
71#define CPU_AHB_24_13 (0x2 << 18)
72#define CPU_AHB_2_1 (0x3 << 18)
73
74#define REG_TO_AHB_SPEED(reg) ((((reg) >> 15) & 0x7) * 10 + 130)
75#define AHB_SPEED_TO_REG(x) ((((x - 130)) / 10) << 15)
76
77/* it is posible to override some settings, use >> OVERRIDE_xxxx_SHIFT */
78#define OVERRIDE_FLASH_TYPE_SHIFT 16
79#define OVERRIDE_FLASH_WIDTH_SHIFT 16
80#define OVERRIDE_FLASH_SIZE_SHIFT 16
81#define OVERRIDE_CPU_AHB_RATIO_SHIFT 15
82#define OVERRIDE_AHB_SPEED_SHIFT 15
83
84/* Global PLL Control Register */
85#define GLOBAL_PLL_CTRL 0x08
86
87#define PLL_BYPASS (1 << 31)
88#define PLL_POWER_DOWN (1 << 8)
89#define PLL_CONTROL_Q (0x1F << 0)
90
91/* Global Soft Reset Control Register */
92#define GLOBAL_RESET 0x0C
93
94#define RESET_GLOBAL (1 << 31)
95#define RESET_CPU1 (1 << 30)
96#define RESET_TVE (1 << 28)
97#define RESET_SATA1 (1 << 27)
98#define RESET_SATA0 (1 << 26)
99#define RESET_CIR (1 << 25)
100#define RESET_EXT_DEV (1 << 24)
101#define RESET_WD (1 << 23)
102#define RESET_GPIO2 (1 << 22)
103#define RESET_GPIO1 (1 << 21)
104#define RESET_GPIO0 (1 << 20)
105#define RESET_SSP (1 << 19)
106#define RESET_UART (1 << 18)
107#define RESET_TIMER (1 << 17)
108#define RESET_RTC (1 << 16)
109#define RESET_INT1 (1 << 15)
110#define RESET_INT0 (1 << 14)
111#define RESET_LCD (1 << 13)
112#define RESET_LPC (1 << 12)
113#define RESET_APB (1 << 11)
114#define RESET_DMA (1 << 10)
115#define RESET_USB1 (1 << 9)
116#define RESET_USB0 (1 << 8)
117#define RESET_PCI (1 << 7)
118#define RESET_GMAC1 (1 << 6)
119#define RESET_GMAC0 (1 << 5)
120#define RESET_SECURITY (1 << 4)
121#define RESET_RAID (1 << 3)
122#define RESET_IDE (1 << 2)
123#define RESET_FLASH (1 << 1)
124#define RESET_DRAM (1 << 0)
125
126/* Global IO Pad Driving Capability Control Register */
127#define GLOBAL_IO_DRIVING_CTRL 0x10
128
129#define DRIVING_CURRENT_MASK 0x3
130
131/* here 00-4mA, 01-8mA, 10-12mA, 11-16mA */
132#define GPIO1_PADS_31_28_SHIFT 28
133#define GPIO0_PADS_31_16_SHIFT 26
134#define GPIO0_PADS_15_0_SHIFT 24
135#define PCI_AND_EXT_RESET_PADS_SHIFT 22
136#define IDE_PADS_SHIFT 20
137#define GMAC1_PADS_SHIFT 18
138#define GMAC0_PADS_SHIFT 16
139/* DRAM is not in mA and poorly documented */
140#define DRAM_CLOCK_PADS_SHIFT 8
141#define DRAM_DATA_PADS_SHIFT 4
142#define DRAM_CONTROL_PADS_SHIFT 0
143
144/* Global IO Pad Slew Rate Control Register */
145#define GLOBAL_IO_SLEW_RATE_CTRL 0x14
146
147#define GPIO1_PADS_31_28_SLOW (1 << 10)
148#define GPIO0_PADS_31_16_SLOW (1 << 9)
149#define GPIO0_PADS_15_0_SLOW (1 << 8)
150#define PCI_PADS_SLOW (1 << 7)
151#define IDE_PADS_SLOW (1 << 6)
152#define GMAC1_PADS_SLOW (1 << 5)
153#define GMAC0_PADS_SLOW (1 << 4)
154#define DRAM_CLOCK_PADS_SLOW (1 << 1)
155#define DRAM_IO_PADS_SLOW (1 << 0)
156
157/*
158 * General skew control defines
159 * 16 steps, each step is around 0.2ns
160 */
161#define SKEW_MASK 0xF
162
163/* Global IDE PAD Skew Control Register */
164#define GLOBAL_IDE_SKEW_CTRL 0x18
165
166#define IDE1_HOST_STROBE_DELAY_SHIFT 28
167#define IDE1_DEVICE_STROBE_DELAY_SHIFT 24
168#define IDE1_OUTPUT_IO_SKEW_SHIFT 20
169#define IDE1_INPUT_IO_SKEW_SHIFT 16
170#define IDE0_HOST_STROBE_DELAY_SHIFT 12
171#define IDE0_DEVICE_STROBE_DELAY_SHIFT 8
172#define IDE0_OUTPUT_IO_SKEW_SHIFT 4
173#define IDE0_INPUT_IO_SKEW_SHIFT 0
174
175/* Global GMAC Control Pad Skew Control Register */
176#define GLOBAL_GMAC_CTRL_SKEW_CTRL 0x1C
177
178#define GMAC1_TXC_SKEW_SHIFT 28
179#define GMAC1_TXEN_SKEW_SHIFT 24
180#define GMAC1_RXC_SKEW_SHIFT 20
181#define GMAC1_RXDV_SKEW_SHIFT 16
182#define GMAC0_TXC_SKEW_SHIFT 12
183#define GMAC0_TXEN_SKEW_SHIFT 8
184#define GMAC0_RXC_SKEW_SHIFT 4
185#define GMAC0_RXDV_SKEW_SHIFT 0
186
187/* Global GMAC0 Data PAD Skew Control Register */
188#define GLOBAL_GMAC0_DATA_SKEW_CTRL 0x20
189/* Global GMAC1 Data PAD Skew Control Register */
190#define GLOBAL_GMAC1_DATA_SKEW_CTRL 0x24
191
192#define GMAC_TXD_SKEW_SHIFT(x) (((x) * 4) + 16)
193#define GMAC_RXD_SKEW_SHIFT(x) ((x) * 4)
194
195/* CPU has two AHB busses. */
196
197/* Global Arbitration0 Control Register */
198#define GLOBAL_ARBITRATION0_CTRL 0x28
199
200#define BOOT_CONTROLLER_HIGH_PRIO (1 << 3)
201#define DMA_BUS1_HIGH_PRIO (1 << 2)
202#define CPU0_HIGH_PRIO (1 << 0)
203
204/* Global Arbitration1 Control Register */
205#define GLOBAL_ARBITRATION1_CTRL 0x2C
206
207#define TVE_HIGH_PRIO (1 << 9)
208#define PCI_HIGH_PRIO (1 << 8)
209#define USB1_HIGH_PRIO (1 << 7)
210#define USB0_HIGH_PRIO (1 << 6)
211#define GMAC1_HIGH_PRIO (1 << 5)
212#define GMAC0_HIGH_PRIO (1 << 4)
213#define SECURITY_HIGH_PRIO (1 << 3)
214#define RAID_HIGH_PRIO (1 << 2)
215#define IDE_HIGH_PRIO (1 << 1)
216#define DMA_BUS2_HIGH_PRIO (1 << 0)
217
218/* Common bits for both arbitration registers */
219#define BURST_LENGTH_SHIFT 16
220#define BURST_LENGTH_MASK (0x3F << 16)
221
222/* Miscellaneous Control Register */
223#define GLOBAL_MISC_CTRL 0x30
224
225#define MEMORY_SPACE_SWAP (1 << 31)
226#define USB1_PLUG_MINIB (1 << 30) /* else plug is mini-A */
227#define USB0_PLUG_MINIB (1 << 29)
228#define GMAC_GMII (1 << 28)
229#define GMAC_1_ENABLE (1 << 27)
230/* TODO: define ATA/SATA bits */
231#define USB1_VBUS_ON (1 << 23)
232#define USB0_VBUS_ON (1 << 22)
233#define APB_CLKOUT_ENABLE (1 << 21)
234#define TVC_CLKOUT_ENABLE (1 << 20)
235#define EXT_CLKIN_ENABLE (1 << 19)
236#define PCI_66MHZ (1 << 18) /* else 33 MHz */
237#define PCI_CLKOUT_ENABLE (1 << 17)
238#define LPC_CLKOUT_ENABLE (1 << 16)
239#define USB1_WAKEUP_ON (1 << 15)
240#define USB0_WAKEUP_ON (1 << 14)
241/* TODO: define PCI idle detect bits */
242#define TVC_PADS_ENABLE (1 << 9)
243#define SSP_PADS_ENABLE (1 << 8)
244#define LCD_PADS_ENABLE (1 << 7)
245#define LPC_PADS_ENABLE (1 << 6)
246#define PCI_PADS_ENABLE (1 << 5)
247#define IDE_PADS_ENABLE (1 << 4)
248#define DRAM_PADS_POWER_DOWN (1 << 3)
249#define NAND_PADS_DISABLE (1 << 2)
250#define PFLASH_PADS_DISABLE (1 << 1)
251#define SFLASH_PADS_DISABLE (1 << 0)
252
253/* Global Clock Control Register */
254#define GLOBAL_CLOCK_CTRL 0x34
255
256#define POWER_STATE_G0 (1 << 31)
257#define POWER_STATE_S1 (1 << 30) /* else it is S3/S4 state */
258#define SECURITY_APB_AHB (1 << 29)
259/* else Security APB clk will be 0.75xAHB */
260/* TODO: TVC clock divider */
261#define PCI_CLKRUN_ENABLE (1 << 16)
262#define BOOT_CLK_DISABLE (1 << 13)
263#define TVC_CLK_DISABLE (1 << 12)
264#define FLASH_CLK_DISABLE (1 << 11)
265#define DDR_CLK_DISABLE (1 << 10)
266#define PCI_CLK_DISABLE (1 << 9)
267#define IDE_CLK_DISABLE (1 << 8)
268#define USB1_CLK_DISABLE (1 << 7)
269#define USB0_CLK_DISABLE (1 << 6)
270#define SATA1_CLK_DISABLE (1 << 5)
271#define SATA0_CLK_DISABLE (1 << 4)
272#define GMAC1_CLK_DISABLE (1 << 3)
273#define GMAC0_CLK_DISABLE (1 << 2)
274#define SECURITY_CLK_DISABLE (1 << 1)
275
276/* TODO: other registers definitions if needed */
277
278#endif /* __MACH_GLOBAL_REG_H */
diff --git a/arch/arm/mach-gemini/include/mach/hardware.h b/arch/arm/mach-gemini/include/mach/hardware.h
new file mode 100644
index 000000000000..de6752674c05
--- /dev/null
+++ b/arch/arm/mach-gemini/include/mach/hardware.h
@@ -0,0 +1,75 @@
1/*
2 * This file contains the hardware definitions for Gemini.
3 *
4 * Copyright (C) 2001-2006 Storlink, Corp.
5 * Copyright (C) 2008-2009 Paulius Zaleckas <paulius.zaleckas@teltonika.lt>
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#ifndef __MACH_HARDWARE_H
13#define __MACH_HARDWARE_H
14
15/*
16 * Memory Map definitions
17 */
18/* FIXME: Does it really swap SRAM like this? */
19#ifdef CONFIG_GEMINI_MEM_SWAP
20# define GEMINI_DRAM_BASE 0x00000000
21# define GEMINI_SRAM_BASE 0x20000000
22#else
23# define GEMINI_SRAM_BASE 0x00000000
24# define GEMINI_DRAM_BASE 0x10000000
25#endif
26#define GEMINI_FLASH_BASE 0x30000000
27#define GEMINI_GLOBAL_BASE 0x40000000
28#define GEMINI_WAQTCHDOG_BASE 0x41000000
29#define GEMINI_UART_BASE 0x42000000
30#define GEMINI_TIMER_BASE 0x43000000
31#define GEMINI_LCD_BASE 0x44000000
32#define GEMINI_RTC_BASE 0x45000000
33#define GEMINI_SATA_BASE 0x46000000
34#define GEMINI_LPC_HOST_BASE 0x47000000
35#define GEMINI_LPC_IO_BASE 0x47800000
36#define GEMINI_INTERRUPT_BASE 0x48000000
37/* TODO: Different interrupt controlers when SMP
38 * #define GEMINI_INTERRUPT0_BASE 0x48000000
39 * #define GEMINI_INTERRUPT1_BASE 0x49000000
40 */
41#define GEMINI_SSP_CTRL_BASE 0x4A000000
42#define GEMINI_POWER_CTRL_BASE 0x4B000000
43#define GEMINI_CIR_BASE 0x4C000000
44#define GEMINI_GPIO_BASE(x) (0x4D000000 + (x) * 0x1000000)
45#define GEMINI_PCI_IO_BASE 0x50000000
46#define GEMINI_PCI_MEM_BASE 0x58000000
47#define GEMINI_TOE_BASE 0x60000000
48#define GEMINI_GMAC0_BASE 0x6000A000
49#define GEMINI_GMAC1_BASE 0x6000E000
50#define GEMINI_SECURITY_BASE 0x62000000
51#define GEMINI_IDE0_BASE 0x63000000
52#define GEMINI_IDE1_BASE 0x63400000
53#define GEMINI_RAID_BASE 0x64000000
54#define GEMINI_FLASH_CTRL_BASE 0x65000000
55#define GEMINI_DRAM_CTRL_BASE 0x66000000
56#define GEMINI_GENERAL_DMA_BASE 0x67000000
57#define GEMINI_USB0_BASE 0x68000000
58#define GEMINI_USB1_BASE 0x69000000
59#define GEMINI_BIG_ENDIAN_BASE 0x80000000
60
61#define GEMINI_TIMER1_BASE GEMINI_TIMER_BASE
62#define GEMINI_TIMER2_BASE (GEMINI_TIMER_BASE + 0x10)
63#define GEMINI_TIMER3_BASE (GEMINI_TIMER_BASE + 0x20)
64
65/*
66 * UART Clock when System clk is 150MHz
67 */
68#define UART_CLK 48000000
69
70/*
71 * macro to get at IO space when running virtually
72 */
73#define IO_ADDRESS(x) ((((x) & 0xFFF00000) >> 4) | ((x) & 0x000FFFFF) | 0xF0000000)
74
75#endif
diff --git a/arch/arm/mach-gemini/include/mach/io.h b/arch/arm/mach-gemini/include/mach/io.h
new file mode 100644
index 000000000000..c548056b98b2
--- /dev/null
+++ b/arch/arm/mach-gemini/include/mach/io.h
@@ -0,0 +1,18 @@
1/*
2 * Copyright (C) 2001-2006 Storlink, Corp.
3 * Copyright (C) 2008-2009 Paulius Zaleckas <paulius.zaleckas@teltonika.lt>
4 *
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; either version 2 of the License, or
8 * (at your option) any later version.
9 */
10#ifndef __MACH_IO_H
11#define __MACH_IO_H
12
13#define IO_SPACE_LIMIT 0xffffffff
14
15#define __io(a) __typesafe_io(a)
16#define __mem_pci(a) (a)
17
18#endif /* __MACH_IO_H */
diff --git a/arch/arm/mach-gemini/include/mach/irqs.h b/arch/arm/mach-gemini/include/mach/irqs.h
new file mode 100644
index 000000000000..c7728ac458f3
--- /dev/null
+++ b/arch/arm/mach-gemini/include/mach/irqs.h
@@ -0,0 +1,50 @@
1/*
2 * Copyright (C) 2001-2006 Storlink, Corp.
3 * Copyright (C) 2008-2009 Paulius Zaleckas <paulius.zaleckas@teltonika.lt>
4 *
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; either version 2 of the License, or
8 * (at your option) any later version.
9 */
10
11#ifndef __MACH_IRQS_H__
12#define __MACH_IRQS_H__
13
14#define IRQ_SERIRQ1 31
15#define IRQ_SERIRQ0 30
16#define IRQ_PCID 29
17#define IRQ_PCIC 28
18#define IRQ_PCIB 27
19#define IRQ_PWR 26
20#define IRQ_CIR 25
21#define IRQ_GPIO(x) (22 + (x))
22#define IRQ_SSP 21
23#define IRQ_LPC 20
24#define IRQ_LCD 19
25#define IRQ_UART 18
26#define IRQ_RTC 17
27#define IRQ_TIMER3 16
28#define IRQ_TIMER2 15
29#define IRQ_TIMER1 14
30#define IRQ_FLASH 12
31#define IRQ_USB1 11
32#define IRQ_USB0 10
33#define IRQ_DMA 9
34#define IRQ_PCI 8
35#define IRQ_IPSEC 7
36#define IRQ_RAID 6
37#define IRQ_IDE1 5
38#define IRQ_IDE0 4
39#define IRQ_WATCHDOG 3
40#define IRQ_GMAC1 2
41#define IRQ_GMAC0 1
42#define IRQ_IPI 0
43
44#define NORMAL_IRQ_NUM 32
45
46#define ARCH_TIMER_IRQ IRQ_TIMER2
47
48#define NR_IRQS NORMAL_IRQ_NUM
49
50#endif /* __MACH_IRQS_H__ */
diff --git a/arch/arm/mach-gemini/include/mach/memory.h b/arch/arm/mach-gemini/include/mach/memory.h
new file mode 100644
index 000000000000..2d14d5bf1f9f
--- /dev/null
+++ b/arch/arm/mach-gemini/include/mach/memory.h
@@ -0,0 +1,19 @@
1/*
2 * Copyright (C) 2001-2006 Storlink, Corp.
3 * Copyright (C) 2008-2009 Paulius Zaleckas <paulius.zaleckas@teltonika.lt>
4 *
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; either version 2 of the License, or
8 * (at your option) any later version.
9 */
10#ifndef __MACH_MEMORY_H
11#define __MACH_MEMORY_H
12
13#ifdef CONFIG_GEMINI_MEM_SWAP
14# define PHYS_OFFSET UL(0x00000000)
15#else
16# define PHYS_OFFSET UL(0x10000000)
17#endif
18
19#endif /* __MACH_MEMORY_H */
diff --git a/arch/arm/mach-gemini/include/mach/system.h b/arch/arm/mach-gemini/include/mach/system.h
new file mode 100644
index 000000000000..bbbd72767a02
--- /dev/null
+++ b/arch/arm/mach-gemini/include/mach/system.h
@@ -0,0 +1,37 @@
1/*
2 * Copyright (C) 2001-2006 Storlink, Corp.
3 * Copyright (C) 2008-2009 Paulius Zaleckas <paulius.zaleckas@teltonika.lt>
4 *
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; either version 2 of the License, or
8 * (at your option) any later version.
9 */
10#ifndef __MACH_SYSTEM_H
11#define __MACH_SYSTEM_H
12
13#include <linux/io.h>
14#include <mach/hardware.h>
15#include <mach/global_reg.h>
16
17static inline void arch_idle(void)
18{
19 /*
20 * Because of broken hardware we have to enable interrupts or the CPU
21 * will never wakeup... Acctualy it is not very good to enable
22 * interrupts here since scheduler can miss a tick, but there is
23 * no other way around this. Platforms that needs it for power saving
24 * should call enable_hlt() in init code, since by default it is
25 * disabled.
26 */
27 local_irq_enable();
28 cpu_do_idle();
29}
30
31static inline void arch_reset(char mode)
32{
33 __raw_writel(RESET_GLOBAL | RESET_CPU1,
34 IO_ADDRESS(GEMINI_GLOBAL_BASE) + GLOBAL_RESET);
35}
36
37#endif /* __MACH_SYSTEM_H */
diff --git a/arch/arm/mach-gemini/include/mach/timex.h b/arch/arm/mach-gemini/include/mach/timex.h
new file mode 100644
index 000000000000..dc5690ba975c
--- /dev/null
+++ b/arch/arm/mach-gemini/include/mach/timex.h
@@ -0,0 +1,13 @@
1/*
2 * Gemini timex specifications
3 *
4 * Copyright (C) 2008-2009 Paulius Zaleckas <paulius.zaleckas@teltonika.lt>
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; either version 2 of the License, or
9 * (at your option) any later version.
10 */
11
12/* When AHB bus frequency is 150MHz */
13#define CLOCK_TICK_RATE 38000000
diff --git a/arch/arm/mach-gemini/include/mach/uncompress.h b/arch/arm/mach-gemini/include/mach/uncompress.h
new file mode 100644
index 000000000000..59c5df7e716c
--- /dev/null
+++ b/arch/arm/mach-gemini/include/mach/uncompress.h
@@ -0,0 +1,42 @@
1/*
2 * Copyright (C) 2008-2009 Paulius Zaleckas <paulius.zaleckas@teltonika.lt>
3 *
4 * Based on mach-pxa/include/mach/uncompress.h:
5 * Copyright: (C) 2001 MontaVista Software Inc.
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#ifndef __MACH_UNCOMPRESS_H
14#define __MACH_UNCOMPRESS_H
15
16#include <linux/serial_reg.h>
17#include <mach/hardware.h>
18
19static volatile unsigned long *UART = (unsigned long *)GEMINI_UART_BASE;
20
21/*
22 * The following code assumes the serial port has already been
23 * initialized by the bootloader. If you didn't setup a port in
24 * your bootloader then nothing will appear (which might be desired).
25 */
26static inline void putc(char c)
27{
28 while (!(UART[UART_LSR] & UART_LSR_THRE))
29 barrier();
30 UART[UART_TX] = c;
31}
32
33#define flush() do { } while (0)
34
35/*
36 * nothing to do
37 */
38#define arch_decomp_setup()
39
40#define arch_decomp_wdog()
41
42#endif /* __MACH_UNCOMPRESS_H */
diff --git a/arch/arm/mach-gemini/include/mach/vmalloc.h b/arch/arm/mach-gemini/include/mach/vmalloc.h
new file mode 100644
index 000000000000..83e536d9436c
--- /dev/null
+++ b/arch/arm/mach-gemini/include/mach/vmalloc.h
@@ -0,0 +1,10 @@
1/*
2 * Copyright (C) 2008-2009 Paulius Zaleckas <paulius.zaleckas@teltonika.lt>
3 *
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License as published by
6 * the Free Software Foundation; either version 2 of the License, or
7 * (at your option) any later version.
8 */
9
10#define VMALLOC_END 0xF0000000
diff --git a/arch/arm/mach-gemini/irq.c b/arch/arm/mach-gemini/irq.c
new file mode 100644
index 000000000000..9e613ca8120d
--- /dev/null
+++ b/arch/arm/mach-gemini/irq.c
@@ -0,0 +1,102 @@
1/*
2 * Interrupt routines for Gemini
3 *
4 * Copyright (C) 2001-2006 Storlink, Corp.
5 * Copyright (C) 2008-2009 Paulius Zaleckas <paulius.zaleckas@teltonika.lt>
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#include <linux/init.h>
13#include <linux/io.h>
14#include <linux/ioport.h>
15#include <linux/stddef.h>
16#include <linux/list.h>
17#include <linux/sched.h>
18#include <asm/irq.h>
19#include <asm/mach/irq.h>
20#include <mach/hardware.h>
21
22#define IRQ_SOURCE(base_addr) (base_addr + 0x00)
23#define IRQ_MASK(base_addr) (base_addr + 0x04)
24#define IRQ_CLEAR(base_addr) (base_addr + 0x08)
25#define IRQ_TMODE(base_addr) (base_addr + 0x0C)
26#define IRQ_TLEVEL(base_addr) (base_addr + 0x10)
27#define IRQ_STATUS(base_addr) (base_addr + 0x14)
28#define FIQ_SOURCE(base_addr) (base_addr + 0x20)
29#define FIQ_MASK(base_addr) (base_addr + 0x24)
30#define FIQ_CLEAR(base_addr) (base_addr + 0x28)
31#define FIQ_TMODE(base_addr) (base_addr + 0x2C)
32#define FIQ_LEVEL(base_addr) (base_addr + 0x30)
33#define FIQ_STATUS(base_addr) (base_addr + 0x34)
34
35static void gemini_ack_irq(unsigned int irq)
36{
37 __raw_writel(1 << irq, IRQ_CLEAR(IO_ADDRESS(GEMINI_INTERRUPT_BASE)));
38}
39
40static void gemini_mask_irq(unsigned int irq)
41{
42 unsigned int mask;
43
44 mask = __raw_readl(IRQ_MASK(IO_ADDRESS(GEMINI_INTERRUPT_BASE)));
45 mask &= ~(1 << irq);
46 __raw_writel(mask, IRQ_MASK(IO_ADDRESS(GEMINI_INTERRUPT_BASE)));
47}
48
49static void gemini_unmask_irq(unsigned int irq)
50{
51 unsigned int mask;
52
53 mask = __raw_readl(IRQ_MASK(IO_ADDRESS(GEMINI_INTERRUPT_BASE)));
54 mask |= (1 << irq);
55 __raw_writel(mask, IRQ_MASK(IO_ADDRESS(GEMINI_INTERRUPT_BASE)));
56}
57
58static struct irq_chip gemini_irq_chip = {
59 .name = "INTC",
60 .ack = gemini_ack_irq,
61 .mask = gemini_mask_irq,
62 .unmask = gemini_unmask_irq,
63};
64
65static struct resource irq_resource = {
66 .name = "irq_handler",
67 .start = IO_ADDRESS(GEMINI_INTERRUPT_BASE),
68 .end = IO_ADDRESS(FIQ_STATUS(GEMINI_INTERRUPT_BASE)) + 4,
69};
70
71void __init gemini_init_irq(void)
72{
73 unsigned int i, mode = 0, level = 0;
74
75 /*
76 * Disable arch_idle() by default since it is buggy
77 * For more info see arch/arm/mach-gemini/include/mach/system.h
78 */
79 disable_hlt();
80
81 request_resource(&iomem_resource, &irq_resource);
82
83 for (i = 0; i < NR_IRQS; i++) {
84 set_irq_chip(i, &gemini_irq_chip);
85 if((i >= IRQ_TIMER1 && i <= IRQ_TIMER3) || (i >= IRQ_SERIRQ0 && i <= IRQ_SERIRQ1)) {
86 set_irq_handler(i, handle_edge_irq);
87 mode |= 1 << i;
88 level |= 1 << i;
89 } else {
90 set_irq_handler(i, handle_level_irq);
91 }
92 set_irq_flags(i, IRQF_VALID | IRQF_PROBE);
93 }
94
95 /* Disable all interrupts */
96 __raw_writel(0, IRQ_MASK(IO_ADDRESS(GEMINI_INTERRUPT_BASE)));
97 __raw_writel(0, FIQ_MASK(IO_ADDRESS(GEMINI_INTERRUPT_BASE)));
98
99 /* Set interrupt mode */
100 __raw_writel(mode, IRQ_TMODE(IO_ADDRESS(GEMINI_INTERRUPT_BASE)));
101 __raw_writel(level, IRQ_TLEVEL(IO_ADDRESS(GEMINI_INTERRUPT_BASE)));
102}
diff --git a/arch/arm/mach-gemini/mm.c b/arch/arm/mach-gemini/mm.c
new file mode 100644
index 000000000000..51948242ec09
--- /dev/null
+++ b/arch/arm/mach-gemini/mm.c
@@ -0,0 +1,82 @@
1/*
2 * Static mappings for Gemini
3 *
4 * Copyright (C) 2001-2006 Storlink, Corp.
5 * Copyright (C) 2008-2009 Paulius Zaleckas <paulius.zaleckas@teltonika.lt>
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#include <linux/mm.h>
13#include <linux/init.h>
14
15#include <asm/mach/map.h>
16
17#include <mach/hardware.h>
18
19/* Page table mapping for I/O region */
20static struct map_desc gemini_io_desc[] __initdata = {
21 {
22 .virtual = IO_ADDRESS(GEMINI_GLOBAL_BASE),
23 .pfn =__phys_to_pfn(GEMINI_GLOBAL_BASE),
24 .length = SZ_512K,
25 .type = MT_DEVICE,
26 }, {
27 .virtual = IO_ADDRESS(GEMINI_UART_BASE),
28 .pfn = __phys_to_pfn(GEMINI_UART_BASE),
29 .length = SZ_512K,
30 .type = MT_DEVICE,
31 }, {
32 .virtual = IO_ADDRESS(GEMINI_TIMER_BASE),
33 .pfn = __phys_to_pfn(GEMINI_TIMER_BASE),
34 .length = SZ_512K,
35 .type = MT_DEVICE,
36 }, {
37 .virtual = IO_ADDRESS(GEMINI_INTERRUPT_BASE),
38 .pfn = __phys_to_pfn(GEMINI_INTERRUPT_BASE),
39 .length = SZ_512K,
40 .type = MT_DEVICE,
41 }, {
42 .virtual = IO_ADDRESS(GEMINI_POWER_CTRL_BASE),
43 .pfn = __phys_to_pfn(GEMINI_POWER_CTRL_BASE),
44 .length = SZ_512K,
45 .type = MT_DEVICE,
46 }, {
47 .virtual = IO_ADDRESS(GEMINI_GPIO_BASE(0)),
48 .pfn = __phys_to_pfn(GEMINI_GPIO_BASE(0)),
49 .length = SZ_512K,
50 .type = MT_DEVICE,
51 }, {
52 .virtual = IO_ADDRESS(GEMINI_GPIO_BASE(1)),
53 .pfn = __phys_to_pfn(GEMINI_GPIO_BASE(1)),
54 .length = SZ_512K,
55 .type = MT_DEVICE,
56 }, {
57 .virtual = IO_ADDRESS(GEMINI_GPIO_BASE(2)),
58 .pfn = __phys_to_pfn(GEMINI_GPIO_BASE(2)),
59 .length = SZ_512K,
60 .type = MT_DEVICE,
61 }, {
62 .virtual = IO_ADDRESS(GEMINI_FLASH_CTRL_BASE),
63 .pfn = __phys_to_pfn(GEMINI_FLASH_CTRL_BASE),
64 .length = SZ_512K,
65 .type = MT_DEVICE,
66 }, {
67 .virtual = IO_ADDRESS(GEMINI_DRAM_CTRL_BASE),
68 .pfn = __phys_to_pfn(GEMINI_DRAM_CTRL_BASE),
69 .length = SZ_512K,
70 .type = MT_DEVICE,
71 }, {
72 .virtual = IO_ADDRESS(GEMINI_GENERAL_DMA_BASE),
73 .pfn = __phys_to_pfn(GEMINI_GENERAL_DMA_BASE),
74 .length = SZ_512K,
75 .type = MT_DEVICE,
76 },
77};
78
79void __init gemini_map_io(void)
80{
81 iotable_init(gemini_io_desc, ARRAY_SIZE(gemini_io_desc));
82}
diff --git a/arch/arm/mach-gemini/time.c b/arch/arm/mach-gemini/time.c
new file mode 100644
index 000000000000..21dc5a89d1c4
--- /dev/null
+++ b/arch/arm/mach-gemini/time.c
@@ -0,0 +1,89 @@
1/*
2 * Copyright (C) 2001-2006 Storlink, Corp.
3 * Copyright (C) 2008-2009 Paulius Zaleckas <paulius.zaleckas@teltonika.lt>
4 *
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; either version 2 of the License, or
8 * (at your option) any later version.
9 */
10#include <linux/interrupt.h>
11#include <linux/irq.h>
12#include <linux/io.h>
13#include <mach/hardware.h>
14#include <mach/global_reg.h>
15#include <asm/mach/time.h>
16
17/*
18 * Register definitions for the timers
19 */
20#define TIMER_COUNT(BASE_ADDR) (BASE_ADDR + 0x00)
21#define TIMER_LOAD(BASE_ADDR) (BASE_ADDR + 0x04)
22#define TIMER_MATCH1(BASE_ADDR) (BASE_ADDR + 0x08)
23#define TIMER_MATCH2(BASE_ADDR) (BASE_ADDR + 0x0C)
24#define TIMER_CR(BASE_ADDR) (BASE_ADDR + 0x30)
25
26#define TIMER_1_CR_ENABLE (1 << 0)
27#define TIMER_1_CR_CLOCK (1 << 1)
28#define TIMER_1_CR_INT (1 << 2)
29#define TIMER_2_CR_ENABLE (1 << 3)
30#define TIMER_2_CR_CLOCK (1 << 4)
31#define TIMER_2_CR_INT (1 << 5)
32#define TIMER_3_CR_ENABLE (1 << 6)
33#define TIMER_3_CR_CLOCK (1 << 7)
34#define TIMER_3_CR_INT (1 << 8)
35
36/*
37 * IRQ handler for the timer
38 */
39static irqreturn_t gemini_timer_interrupt(int irq, void *dev_id)
40{
41 timer_tick();
42
43 return IRQ_HANDLED;
44}
45
46static struct irqaction gemini_timer_irq = {
47 .name = "Gemini Timer Tick",
48 .flags = IRQF_DISABLED | IRQF_TIMER,
49 .handler = gemini_timer_interrupt,
50};
51
52/*
53 * Set up timer interrupt, and return the current time in seconds.
54 */
55void __init gemini_timer_init(void)
56{
57 unsigned int tick_rate, reg_v;
58
59 reg_v = __raw_readl(IO_ADDRESS(GEMINI_GLOBAL_BASE + GLOBAL_STATUS));
60 tick_rate = REG_TO_AHB_SPEED(reg_v) * 1000000;
61
62 printk(KERN_INFO "Bus: %dMHz", tick_rate / 1000000);
63
64 tick_rate /= 6; /* APB bus run AHB*(1/6) */
65
66 switch(reg_v & CPU_AHB_RATIO_MASK) {
67 case CPU_AHB_1_1:
68 printk(KERN_CONT "(1/1)\n");
69 break;
70 case CPU_AHB_3_2:
71 printk(KERN_CONT "(3/2)\n");
72 break;
73 case CPU_AHB_24_13:
74 printk(KERN_CONT "(24/13)\n");
75 break;
76 case CPU_AHB_2_1:
77 printk(KERN_CONT "(2/1)\n");
78 break;
79 }
80
81 /*
82 * Make irqs happen for the system timer
83 */
84 setup_irq(IRQ_TIMER2, &gemini_timer_irq);
85 /* Start the timer */
86 __raw_writel(tick_rate / HZ, TIMER_COUNT(IO_ADDRESS(GEMINI_TIMER2_BASE)));
87 __raw_writel(tick_rate / HZ, TIMER_LOAD(IO_ADDRESS(GEMINI_TIMER2_BASE)));
88 __raw_writel(TIMER_2_CR_ENABLE | TIMER_2_CR_INT, TIMER_CR(IO_ADDRESS(GEMINI_TIMER_BASE)));
89}
generated by cgit v1.2.2 (git 2.25.0) at 2025-12-26 02:17:36 -0500