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 /*
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 */
36 extern unsigned long ixp4xx_exp_bus_size;
37
38 #define IXP4XX_EXP_BUS_BASE(region)\
39 (IXP4XX_EXP_BUS_BASE_PHYS + ((region) * ixp4xx_exp_bus_size))
40
41 #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
68 #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 * This structure provide a means for the board setup code
80 * to give information to th pata_ixp4xx driver. It is
81 * passed as platform_data.
82 */
83 struct ixp4xx_pata_data {
84 volatile u32 *cs0_cfg;
85 volatile u32 *cs1_cfg;
86 unsigned long cs0_bits;
87 unsigned long cs1_bits;
88 void __iomem *cs0;
89 void __iomem *cs1;
90 };
91
92 struct sys_timer;
93
94 #define IXP4XX_ETH_NPEA 0x00
95 #define IXP4XX_ETH_NPEB 0x10
96 #define IXP4XX_ETH_NPEC 0x20
97
98 /* Information about built-in Ethernet MAC interfaces */
99 struct eth_plat_info {
100 u8 phy; /* MII PHY ID, 0 - 31 */
101 u8 rxq; /* configurable, currently 0 - 31 only */
102 u8 txreadyq;
103 u8 hwaddr[6];
104 };
105
106 /* Information about built-in HSS (synchronous serial) interfaces */
107 struct hss_plat_info {
108 int (*set_clock)(int port, unsigned int clock_type);
109 int (*open)(int port, void *pdev,
110 void (*set_carrier_cb)(void *pdev, int carrier));
111 void (*close)(int port, void *pdev);
112 u8 txreadyq;
113 };
114
115 /*
116 * Frequency of clock used for primary clocksource
117 */
118 extern unsigned long ixp4xx_timer_freq;
119
120 /*
121 * Functions used by platform-level setup code
122 */
123 extern void ixp4xx_map_io(void);
124 extern void ixp4xx_init_irq(void);
125 extern void ixp4xx_sys_init(void);
126 extern void ixp4xx_timer_init(void);
127 extern struct sys_timer ixp4xx_timer;
128 extern void ixp4xx_pci_preinit(void);
129 struct pci_sys_data;
130 extern int ixp4xx_setup(int nr, struct pci_sys_data *sys);
131 extern struct pci_bus *ixp4xx_scan_bus(int nr, struct pci_sys_data *sys);
132
133 /*
134 * GPIO-functions
135 */
136 /*
137 * The following converted to the real HW bits the gpio_line_config
138 */
139 /* GPIO pin types */
140 #define IXP4XX_GPIO_OUT 0x1
141 #define IXP4XX_GPIO_IN 0x2
142
143 /* GPIO signal types */
144 #define IXP4XX_GPIO_LOW 0
145 #define IXP4XX_GPIO_HIGH 1
146
147 /* GPIO Clocks */
148 #define IXP4XX_GPIO_CLK_0 14
149 #define IXP4XX_GPIO_CLK_1 15
150
151 static inline void gpio_line_config(u8 line, u32 direction)
152 {
153 if (direction == IXP4XX_GPIO_IN)
154 *IXP4XX_GPIO_GPOER |= (1 << line);
155 else
156 *IXP4XX_GPIO_GPOER &= ~(1 << line);
157 }
158
159 static inline void gpio_line_get(u8 line, int *value)
160 {
161 *value = (*IXP4XX_GPIO_GPINR >> line) & 0x1;
162 }
163
164 static inline void gpio_line_set(u8 line, int value)
165 {
166 if (value == IXP4XX_GPIO_HIGH)
167 *IXP4XX_GPIO_GPOUTR |= (1 << line);
168 else if (value == IXP4XX_GPIO_LOW)
169 *IXP4XX_GPIO_GPOUTR &= ~(1 << line);
170 }
171
172 #endif // __ASSEMBLY__
173
174
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