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Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
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
Deepak Saxena54e269e2006-01-05 20:59:29 +000029/*
30 * The expansion bus on the IXP4xx can be configured for either 16 or
31 * 32MB windows and the CS offset for each region changes based on the
32 * current configuration. This means that we cannot simply hardcode
33 * each offset. ixp4xx_sys_init() looks at the expansion bus configuration
34 * as setup by the bootloader to determine our window size.
35 */
36extern unsigned long ixp4xx_exp_bus_size;
Linus Torvalds1da177e2005-04-16 15:20:36 -070037
Deepak Saxena54e269e2006-01-05 20:59:29 +000038#define IXP4XX_EXP_BUS_BASE(region)\
39 (IXP4XX_EXP_BUS_BASE_PHYS + ((region) * ixp4xx_exp_bus_size))
Linus Torvalds1da177e2005-04-16 15:20:36 -070040
Alessandro Zummo03bd14c2006-03-20 17:10:10 +000041#define IXP4XX_EXP_BUS_END(region)\
42 (IXP4XX_EXP_BUS_BASE(region) + ixp4xx_exp_bus_size - 1)
43
44/* Those macros can be used to adjust timing and configure
45 * other features for each region.
46 */
47
48#define IXP4XX_EXP_BUS_RECOVERY_T(x) (((x) & 0x0f) << 16)
49#define IXP4XX_EXP_BUS_HOLD_T(x) (((x) & 0x03) << 20)
50#define IXP4XX_EXP_BUS_STROBE_T(x) (((x) & 0x0f) << 22)
51#define IXP4XX_EXP_BUS_SETUP_T(x) (((x) & 0x03) << 26)
52#define IXP4XX_EXP_BUS_ADDR_T(x) (((x) & 0x03) << 28)
53#define IXP4XX_EXP_BUS_SIZE(x) (((x) & 0x0f) << 10)
54#define IXP4XX_EXP_BUS_CYCLES(x) (((x) & 0x03) << 14)
55
56#define IXP4XX_EXP_BUS_CS_EN (1L << 31)
57#define IXP4XX_EXP_BUS_BYTE_RD16 (1L << 6)
58#define IXP4XX_EXP_BUS_HRDY_POL (1L << 5)
59#define IXP4XX_EXP_BUS_MUX_EN (1L << 4)
60#define IXP4XX_EXP_BUS_SPLT_EN (1L << 3)
61#define IXP4XX_EXP_BUS_WR_EN (1L << 1)
62#define IXP4XX_EXP_BUS_BYTE_EN (1L << 0)
63
64#define IXP4XX_EXP_BUS_CYCLES_INTEL 0x00
65#define IXP4XX_EXP_BUS_CYCLES_MOTOROLA 0x01
66#define IXP4XX_EXP_BUS_CYCLES_HPI 0x02
67
Linus Torvalds1da177e2005-04-16 15:20:36 -070068#define IXP4XX_FLASH_WRITABLE (0x2)
69#define IXP4XX_FLASH_DEFAULT (0xbcd23c40)
70#define IXP4XX_FLASH_WRITE (0xbcd23c42)
71
72/*
73 * Clock Speed Definitions.
74 */
75#define IXP4XX_PERIPHERAL_BUS_CLOCK (66) /* 66Mhzi APB BUS */
76#define IXP4XX_UART_XTAL 14745600
77
78/*
79 * The IXP4xx chips do not have an I2C unit, so GPIO lines are just
80 * used to
81 * Used as platform_data to provide GPIO pin information to the ixp42x
82 * I2C driver.
83 */
84struct ixp4xx_i2c_pins {
85 unsigned long sda_pin;
86 unsigned long scl_pin;
87};
88
Alessandro Zummo0df0d0a2006-11-14 13:43:21 -050089/*
90 * This structure provide a means for the board setup code
91 * to give information to th pata_ixp4xx driver. It is
92 * passed as platform_data.
93 */
94struct ixp4xx_pata_data {
95 volatile u32 *cs0_cfg;
96 volatile u32 *cs1_cfg;
97 unsigned long cs0_bits;
98 unsigned long cs1_bits;
99 void __iomem *cs0;
100 void __iomem *cs1;
101};
Linus Torvalds1da177e2005-04-16 15:20:36 -0700102
103struct sys_timer;
104
105/*
Kevin Hilman84904d02006-09-22 00:58:57 +0100106 * Frequency of clock used for primary clocksource
107 */
108extern unsigned long ixp4xx_timer_freq;
109
110/*
Linus Torvalds1da177e2005-04-16 15:20:36 -0700111 * Functions used by platform-level setup code
112 */
113extern void ixp4xx_map_io(void);
114extern void ixp4xx_init_irq(void);
115extern void ixp4xx_sys_init(void);
116extern struct sys_timer ixp4xx_timer;
117extern void ixp4xx_pci_preinit(void);
118struct pci_sys_data;
119extern int ixp4xx_setup(int nr, struct pci_sys_data *sys);
120extern struct pci_bus *ixp4xx_scan_bus(int nr, struct pci_sys_data *sys);
121
122/*
123 * GPIO-functions
124 */
125/*
126 * The following converted to the real HW bits the gpio_line_config
127 */
128/* GPIO pin types */
129#define IXP4XX_GPIO_OUT 0x1
130#define IXP4XX_GPIO_IN 0x2
131
Linus Torvalds1da177e2005-04-16 15:20:36 -0700132/* GPIO signal types */
133#define IXP4XX_GPIO_LOW 0
134#define IXP4XX_GPIO_HIGH 1
135
136/* GPIO Clocks */
137#define IXP4XX_GPIO_CLK_0 14
138#define IXP4XX_GPIO_CLK_1 15
139
Deepak Saxenabdf82b52005-08-29 22:46:30 +0100140static inline void gpio_line_config(u8 line, u32 direction)
141{
Deepak Saxenace124672005-10-04 16:32:38 -0700142 if (direction == IXP4XX_GPIO_IN)
Deepak Saxenabdf82b52005-08-29 22:46:30 +0100143 *IXP4XX_GPIO_GPOER |= (1 << line);
144 else
145 *IXP4XX_GPIO_GPOER &= ~(1 << line);
146}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700147
148static inline void gpio_line_get(u8 line, int *value)
149{
150 *value = (*IXP4XX_GPIO_GPINR >> line) & 0x1;
151}
152
153static inline void gpio_line_set(u8 line, int value)
154{
155 if (value == IXP4XX_GPIO_HIGH)
156 *IXP4XX_GPIO_GPOUTR |= (1 << line);
157 else if (value == IXP4XX_GPIO_LOW)
158 *IXP4XX_GPIO_GPOUTR &= ~(1 << line);
159}
160
Linus Torvalds1da177e2005-04-16 15:20:36 -0700161#endif // __ASSEMBLY__
162