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-rw-r--r--include/asm-arm/arch-ixp2000/platform.h152
1 files changed, 0 insertions, 152 deletions
diff --git a/include/asm-arm/arch-ixp2000/platform.h b/include/asm-arm/arch-ixp2000/platform.h
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1/*
2 * include/asm-arm/arch-ixp2000/platform.h
3 *
4 * Various bits of code used by platform-level code.
5 *
6 * Author: Deepak Saxena <dsaxena@plexity.net>
7 *
8 * Copyright 2004 (c) MontaVista Software, Inc.
9 *
10 * This file is licensed under the terms of the GNU General Public
11 * License version 2. This program is licensed "as is" without any
12 * warranty of any kind, whether express or implied.
13 */
14
15
16#ifndef __ASSEMBLY__
17
18static inline unsigned long ixp2000_reg_read(volatile void *reg)
19{
20 return *((volatile unsigned long *)reg);
21}
22
23static inline void ixp2000_reg_write(volatile void *reg, unsigned long val)
24{
25 *((volatile unsigned long *)reg) = val;
26}
27
28/*
29 * On the IXP2400, we can't use XCB=000 due to chip bugs. We use
30 * XCB=101 instead, but that makes all I/O accesses bufferable. This
31 * is not a problem in general, but we do have to be slightly more
32 * careful because I/O writes are no longer automatically flushed out
33 * of the write buffer.
34 *
35 * In cases where we want to make sure that a write has been flushed
36 * out of the write buffer before we proceed, for example when masking
37 * a device interrupt before re-enabling IRQs in CPSR, we can use this
38 * function, ixp2000_reg_wrb, which performs a write, a readback, and
39 * issues a dummy instruction dependent on the value of the readback
40 * (mov rX, rX) to make sure that the readback has completed before we
41 * continue.
42 */
43static inline void ixp2000_reg_wrb(volatile void *reg, unsigned long val)
44{
45 unsigned long dummy;
46
47 *((volatile unsigned long *)reg) = val;
48
49 dummy = *((volatile unsigned long *)reg);
50 __asm__ __volatile__("mov %0, %0" : "+r" (dummy));
51}
52
53/*
54 * Boards may multiplex different devices on the 2nd channel of
55 * the slowport interface that each need different configuration
56 * settings. For example, the IXDP2400 uses channel 2 on the interface
57 * to access the CPLD, the switch fabric card, and the media card. Each
58 * one needs a different mode so drivers must save/restore the mode
59 * before and after each operation.
60 *
61 * acquire_slowport(&your_config);
62 * ...
63 * do slowport operations
64 * ...
65 * release_slowport();
66 *
67 * Note that while you have the slowport, you are holding a spinlock,
68 * so your code should be written as if you explicitly acquired a lock.
69 *
70 * The configuration only affects device 2 on the slowport, so the
71 * MTD map driver does not acquire/release the slowport.
72 */
73struct slowport_cfg {
74 unsigned long CCR; /* Clock divide */
75 unsigned long WTC; /* Write Timing Control */
76 unsigned long RTC; /* Read Timing Control */
77 unsigned long PCR; /* Protocol Control Register */
78 unsigned long ADC; /* Address/Data Width Control */
79};
80
81
82void ixp2000_acquire_slowport(struct slowport_cfg *, struct slowport_cfg *);
83void ixp2000_release_slowport(struct slowport_cfg *);
84
85/*
86 * IXP2400 A0/A1 and IXP2800 A0/A1/A2 have broken slowport that requires
87 * tweaking of addresses in the MTD driver.
88 */
89static inline unsigned ixp2000_has_broken_slowport(void)
90{
91 unsigned long id = *IXP2000_PRODUCT_ID;
92 unsigned long id_prod = id & (IXP2000_MAJ_PROD_TYPE_MASK |
93 IXP2000_MIN_PROD_TYPE_MASK);
94 return (((id_prod ==
95 /* fixed in IXP2400-B0 */
96 (IXP2000_MAJ_PROD_TYPE_IXP2000 |
97 IXP2000_MIN_PROD_TYPE_IXP2400)) &&
98 ((id & IXP2000_MAJ_REV_MASK) == 0)) ||
99 ((id_prod ==
100 /* fixed in IXP2800-B0 */
101 (IXP2000_MAJ_PROD_TYPE_IXP2000 |
102 IXP2000_MIN_PROD_TYPE_IXP2800)) &&
103 ((id & IXP2000_MAJ_REV_MASK) == 0)) ||
104 ((id_prod ==
105 /* fixed in IXP2850-B0 */
106 (IXP2000_MAJ_PROD_TYPE_IXP2000 |
107 IXP2000_MIN_PROD_TYPE_IXP2850)) &&
108 ((id & IXP2000_MAJ_REV_MASK) == 0)));
109}
110
111static inline unsigned int ixp2000_has_flash(void)
112{
113 return ((*IXP2000_STRAP_OPTIONS) & (CFG_BOOT_PROM));
114}
115
116static inline unsigned int ixp2000_is_pcimaster(void)
117{
118 return ((*IXP2000_STRAP_OPTIONS) & (CFG_PCI_BOOT_HOST));
119}
120
121void ixp2000_map_io(void);
122void ixp2000_uart_init(void);
123void ixp2000_init_irq(void);
124void ixp2000_init_time(unsigned long);
125unsigned long ixp2000_gettimeoffset(void);
126
127struct pci_sys_data;
128
129u32 *ixp2000_pci_config_addr(unsigned int bus, unsigned int devfn, int where);
130void ixp2000_pci_preinit(void);
131int ixp2000_pci_setup(int, struct pci_sys_data*);
132struct pci_bus* ixp2000_pci_scan_bus(int, struct pci_sys_data*);
133int ixp2000_pci_read_config(struct pci_bus*, unsigned int, int, int, u32 *);
134int ixp2000_pci_write_config(struct pci_bus*, unsigned int, int, int, u32);
135
136/*
137 * Several of the IXP2000 systems have banked flash so we need to extend the
138 * flash_platform_data structure with some private pointers
139 */
140struct ixp2000_flash_data {
141 struct flash_platform_data *platform_data;
142 int nr_banks;
143 unsigned long (*bank_setup)(unsigned long);
144};
145
146struct ixp2000_i2c_pins {
147 unsigned long sda_pin;
148 unsigned long scl_pin;
149};
150
151
152#endif /* !__ASSEMBLY__ */
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