1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
|
/*
* include/asm-arm/arch-ixp2000/platform.h
*
* Various bits of code used by platform-level code.
*
* Author: Deepak Saxena <dsaxena@plexity.net>
*
* Copyright 2004 (c) MontaVista Software, Inc.
*
* This file is licensed under the terms of the GNU General Public
* License version 2. This program is licensed "as is" without any
* warranty of any kind, whether express or implied.
*/
#ifndef __ASSEMBLY__
static inline unsigned long ixp2000_reg_read(volatile void *reg)
{
return *((volatile unsigned long *)reg);
}
static inline void ixp2000_reg_write(volatile void *reg, unsigned long val)
{
*((volatile unsigned long *)reg) = val;
}
/*
* On the IXP2400, we can't use XCB=000 due to chip bugs. We use
* XCB=101 instead, but that makes all I/O accesses bufferable. This
* is not a problem in general, but we do have to be slightly more
* careful because I/O writes are no longer automatically flushed out
* of the write buffer.
*
* In cases where we want to make sure that a write has been flushed
* out of the write buffer before we proceed, for example when masking
* a device interrupt before re-enabling IRQs in CPSR, we can use this
* function, ixp2000_reg_wrb, which performs a write, a readback, and
* issues a dummy instruction dependent on the value of the readback
* (mov rX, rX) to make sure that the readback has completed before we
* continue.
*/
static inline void ixp2000_reg_wrb(volatile void *reg, unsigned long val)
{
unsigned long dummy;
*((volatile unsigned long *)reg) = val;
dummy = *((volatile unsigned long *)reg);
__asm__ __volatile__("mov %0, %0" : "+r" (dummy));
}
/*
* Boards may multiplex different devices on the 2nd channel of
* the slowport interface that each need different configuration
* settings. For example, the IXDP2400 uses channel 2 on the interface
* to access the CPLD, the switch fabric card, and the media card. Each
* one needs a different mode so drivers must save/restore the mode
* before and after each operation.
*
* acquire_slowport(&your_config);
* ...
* do slowport operations
* ...
* release_slowport();
*
* Note that while you have the slowport, you are holding a spinlock,
* so your code should be written as if you explicitly acquired a lock.
*
* The configuration only affects device 2 on the slowport, so the
* MTD map driver does not acquire/release the slowport.
*/
struct slowport_cfg {
unsigned long CCR; /* Clock divide */
unsigned long WTC; /* Write Timing Control */
unsigned long RTC; /* Read Timing Control */
unsigned long PCR; /* Protocol Control Register */
unsigned long ADC; /* Address/Data Width Control */
};
void ixp2000_acquire_slowport(struct slowport_cfg *, struct slowport_cfg *);
void ixp2000_release_slowport(struct slowport_cfg *);
/*
* IXP2400 A0/A1 and IXP2800 A0/A1/A2 have broken slowport that requires
* tweaking of addresses in the MTD driver.
*/
static inline unsigned ixp2000_has_broken_slowport(void)
{
unsigned long id = *IXP2000_PRODUCT_ID;
unsigned long id_prod = id & (IXP2000_MAJ_PROD_TYPE_MASK |
IXP2000_MIN_PROD_TYPE_MASK);
return (((id_prod ==
/* fixed in IXP2400-B0 */
(IXP2000_MAJ_PROD_TYPE_IXP2000 |
IXP2000_MIN_PROD_TYPE_IXP2400)) &&
((id & IXP2000_MAJ_REV_MASK) == 0)) ||
((id_prod ==
/* fixed in IXP2800-B0 */
(IXP2000_MAJ_PROD_TYPE_IXP2000 |
IXP2000_MIN_PROD_TYPE_IXP2800)) &&
((id & IXP2000_MAJ_REV_MASK) == 0)) ||
((id_prod ==
/* fixed in IXP2850-B0 */
(IXP2000_MAJ_PROD_TYPE_IXP2000 |
IXP2000_MIN_PROD_TYPE_IXP2850)) &&
((id & IXP2000_MAJ_REV_MASK) == 0)));
}
static inline unsigned int ixp2000_has_flash(void)
{
return ((*IXP2000_STRAP_OPTIONS) & (CFG_BOOT_PROM));
}
static inline unsigned int ixp2000_is_pcimaster(void)
{
return ((*IXP2000_STRAP_OPTIONS) & (CFG_PCI_BOOT_HOST));
}
void ixp2000_map_io(void);
void ixp2000_uart_init(void);
void ixp2000_init_irq(void);
void ixp2000_init_time(unsigned long);
unsigned long ixp2000_gettimeoffset(void);
struct pci_sys_data;
u32 *ixp2000_pci_config_addr(unsigned int bus, unsigned int devfn, int where);
void ixp2000_pci_preinit(void);
int ixp2000_pci_setup(int, struct pci_sys_data*);
struct pci_bus* ixp2000_pci_scan_bus(int, struct pci_sys_data*);
int ixp2000_pci_read_config(struct pci_bus*, unsigned int, int, int, u32 *);
int ixp2000_pci_write_config(struct pci_bus*, unsigned int, int, int, u32);
/*
* Several of the IXP2000 systems have banked flash so we need to extend the
* flash_platform_data structure with some private pointers
*/
struct ixp2000_flash_data {
struct flash_platform_data *platform_data;
int nr_banks;
unsigned long (*bank_setup)(unsigned long);
};
struct ixp2000_i2c_pins {
unsigned long sda_pin;
unsigned long scl_pin;
};
#endif /* !__ASSEMBLY__ */
|
