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authorPaulius Zaleckas <paulius.zaleckas@teltonika.lt>2009-03-26 04:06:08 -0400
committerPaulius Zaleckas <paulius.zaleckas@teltonika.lt>2009-03-26 04:06:08 -0400
commit59d3a193f1ec1639db447aa1ceb39cd1811fb36e (patch)
treee5c5572b3b8b654da76f0fa82c3c78449bb53e90 /arch/arm/mach-gemini
parent6a915af99fc974be8f2180132ddff7d32aad8779 (diff)
ARM: Add Gemini architecture v3
Adds support for Cortina Systems Gemini family CPUs: http://www.cortina-systems.com/products/category/18 v3: - fixed __io(a) to be defined as __typesafe_io(a) v2: - #include <asm/io.h> -> <linux/io.h> - remove asm/system.h include - revorked mm.c to use named initializers - removed "empty" dma.h - updated copyrights Signed-off-by: Paulius Zaleckas <paulius.zaleckas@teltonika.lt>
Diffstat (limited to 'arch/arm/mach-gemini')
-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
19 files changed, 1024 insertions, 0 deletions
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 2024-12-20 04:07:01 -0500