tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1/*
2 * include/asm-arm/arch-ixp4xx/platform.h
3 *
4 * Constants and functions that are useful to IXP4xx platform-specific code
5 * and device drivers.
6 *
7 * Copyright (C) 2004 MontaVista Software, Inc.
8 */
9
10#ifndef __ASM_ARCH_HARDWARE_H__
11#error "Do not include this directly, instead #include <asm/hardware.h>"
12#endif
13
14#ifndef __ASSEMBLY__
15
16#include <asm/types.h>
17
18#ifndef __ARMEB__
19#define REG_OFFSET 0
20#else
21#define REG_OFFSET 3
22#endif
23
24/*
25 * Expansion bus memory regions
26 */
27#define IXP4XX_EXP_BUS_BASE_PHYS (0x50000000)
28
29#define IXP4XX_EXP_BUS_CSX_REGION_SIZE (0x01000000)
30
31#define IXP4XX_EXP_BUS_CS0_BASE_PHYS (IXP4XX_EXP_BUS_BASE_PHYS + 0x00000000)
32#define IXP4XX_EXP_BUS_CS1_BASE_PHYS (IXP4XX_EXP_BUS_BASE_PHYS + 0x01000000)
33#define IXP4XX_EXP_BUS_CS2_BASE_PHYS (IXP4XX_EXP_BUS_BASE_PHYS + 0x02000000)
34#define IXP4XX_EXP_BUS_CS3_BASE_PHYS (IXP4XX_EXP_BUS_BASE_PHYS + 0x03000000)
35#define IXP4XX_EXP_BUS_CS4_BASE_PHYS (IXP4XX_EXP_BUS_BASE_PHYS + 0x04000000)
36#define IXP4XX_EXP_BUS_CS5_BASE_PHYS (IXP4XX_EXP_BUS_BASE_PHYS + 0x05000000)
37#define IXP4XX_EXP_BUS_CS6_BASE_PHYS (IXP4XX_EXP_BUS_BASE_PHYS + 0x06000000)
38#define IXP4XX_EXP_BUS_CS7_BASE_PHYS (IXP4XX_EXP_BUS_BASE_PHYS + 0x07000000)
39
40#define IXP4XX_FLASH_WRITABLE (0x2)
41#define IXP4XX_FLASH_DEFAULT (0xbcd23c40)
42#define IXP4XX_FLASH_WRITE (0xbcd23c42)
43
44/*
45 * Clock Speed Definitions.
46 */
47#define IXP4XX_PERIPHERAL_BUS_CLOCK (66) /* 66Mhzi APB BUS */
48#define IXP4XX_UART_XTAL 14745600
49
50/*
51 * The IXP4xx chips do not have an I2C unit, so GPIO lines are just
52 * used to
53 * Used as platform_data to provide GPIO pin information to the ixp42x
54 * I2C driver.
55 */
56struct ixp4xx_i2c_pins {
57 unsigned long sda_pin;
58 unsigned long scl_pin;
59};
60
61
62struct sys_timer;
63
64/*
65 * Functions used by platform-level setup code
66 */
67extern void ixp4xx_map_io(void);
68extern void ixp4xx_init_irq(void);
69extern void ixp4xx_sys_init(void);
70extern struct sys_timer ixp4xx_timer;
71extern void ixp4xx_pci_preinit(void);
72struct pci_sys_data;
73extern int ixp4xx_setup(int nr, struct pci_sys_data *sys);
74extern struct pci_bus *ixp4xx_scan_bus(int nr, struct pci_sys_data *sys);
75
76/*
77 * GPIO-functions
78 */
79/*
80 * The following converted to the real HW bits the gpio_line_config
81 */
82/* GPIO pin types */
83#define IXP4XX_GPIO_OUT 0x1
84#define IXP4XX_GPIO_IN 0x2
85
86/* GPIO signal types */
87#define IXP4XX_GPIO_LOW 0
88#define IXP4XX_GPIO_HIGH 1
89
90/* GPIO Clocks */
91#define IXP4XX_GPIO_CLK_0 14
92#define IXP4XX_GPIO_CLK_1 15
93
94static inline void gpio_line_config(u8 line, u32 direction)
95{
96 if (direction == IXP4XX_GPIO_OUT)
97 *IXP4XX_GPIO_GPOER |= (1 << line);
98 else
99 *IXP4XX_GPIO_GPOER &= ~(1 << line);
100}
101
102static inline void gpio_line_get(u8 line, int *value)
103{
104 *value = (*IXP4XX_GPIO_GPINR >> line) & 0x1;
105}
106
107static inline void gpio_line_set(u8 line, int value)
108{
109 if (value == IXP4XX_GPIO_HIGH)
110 *IXP4XX_GPIO_GPOUTR |= (1 << line);
111 else if (value == IXP4XX_GPIO_LOW)
112 *IXP4XX_GPIO_GPOUTR &= ~(1 << line);
113}
114
115static inline void gpio_line_isr_clear(u8 line)
116{
117 *IXP4XX_GPIO_GPISR = (1 << line);
118}
119
120#endif // __ASSEMBLY__
121