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1da177e4 LT |
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 | ||
18 | /* | |
19 | * The IXP2400 B0 silicon contains an erratum (#66) that causes writes | |
20 | * to on-chip I/O register to not complete fully. What this means is | |
21 | * that if you have a write to on-chip I/O followed by a back-to-back | |
22 | * read or write, the first write will happen twice. OR...if it's | |
23 | * not a back-to-back transaction, the read or write will generate | |
24 | * incorrect data. | |
25 | * | |
26 | * The official work around for this is to set the on-chip I/O regions | |
27 | * as XCB=101 and then force a read-back from the register. | |
28 | * | |
29 | */ | |
30 | #if defined(CONFIG_ARCH_ENP2611) || defined(CONFIG_ARCH_IXDP2400) || defined(CONFIG_ARCH_IXDP2401) | |
31 | ||
32 | #include <asm/system.h> /* Pickup local_irq_ functions */ | |
33 | ||
917afce1 | 34 | static inline void ixp2000_reg_write(volatile void *reg, unsigned long val) |
1da177e4 | 35 | { |
917afce1 | 36 | unsigned long dummy; |
1da177e4 LT |
37 | unsigned long flags; |
38 | ||
39 | local_irq_save(flags); | |
917afce1 | 40 | *((volatile unsigned long *)reg) = val; |
1da177e4 | 41 | barrier(); |
917afce1 | 42 | dummy = *((volatile unsigned long *)reg); |
1da177e4 LT |
43 | local_irq_restore(flags); |
44 | } | |
45 | #else | |
917afce1 LB |
46 | static inline void ixp2000_reg_write(volatile void *reg, unsigned long val) |
47 | { | |
48 | *((volatile unsigned long *)reg) = val; | |
49 | } | |
1da177e4 | 50 | #endif /* IXDP2400 || IXDP2401 */ |
917afce1 | 51 | #define ixp2000_reg_read(reg) (*((volatile unsigned long *)reg)) |
1da177e4 LT |
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 | */ | |
73 | struct 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 | ||
82 | void ixp2000_acquire_slowport(struct slowport_cfg *, struct slowport_cfg *); | |
83 | void 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 | */ | |
89 | static inline unsigned ixp2000_has_broken_slowport(void) | |
90 | { | |
44449bbf | 91 | unsigned long id = *IXP2000_PRODUCT_ID; |
1da177e4 LT |
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 | ||
111 | static inline unsigned int ixp2000_has_flash(void) | |
112 | { | |
113 | return ((*IXP2000_STRAP_OPTIONS) & (CFG_BOOT_PROM)); | |
114 | } | |
115 | ||
116 | static inline unsigned int ixp2000_is_pcimaster(void) | |
117 | { | |
118 | return ((*IXP2000_STRAP_OPTIONS) & (CFG_PCI_BOOT_HOST)); | |
119 | } | |
120 | ||
121 | void ixp2000_map_io(void); | |
28187f2c | 122 | void ixp2000_uart_init(void); |
1da177e4 LT |
123 | void ixp2000_init_irq(void); |
124 | void ixp2000_init_time(unsigned long); | |
125 | unsigned long ixp2000_gettimeoffset(void); | |
126 | ||
127 | struct pci_sys_data; | |
128 | ||
8443b165 | 129 | u32 *ixp2000_pci_config_addr(unsigned int bus, unsigned int devfn, int where); |
1da177e4 LT |
130 | void ixp2000_pci_preinit(void); |
131 | int ixp2000_pci_setup(int, struct pci_sys_data*); | |
132 | struct pci_bus* ixp2000_pci_scan_bus(int, struct pci_sys_data*); | |
133 | int ixp2000_pci_read_config(struct pci_bus*, unsigned int, int, int, u32 *); | |
134 | int 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 | */ | |
140 | struct ixp2000_flash_data { | |
141 | struct flash_platform_data *platform_data; | |
142 | int nr_banks; | |
143 | unsigned long (*bank_setup)(unsigned long); | |
144 | }; | |
145 | ||
1da177e4 LT |
146 | struct ixp2000_i2c_pins { |
147 | unsigned long sda_pin; | |
148 | unsigned long scl_pin; | |
149 | }; | |
150 | ||
c4982887 | 151 | |
1da177e4 | 152 | #endif /* !__ASSEMBLY__ */ |