diff options
author | Jonathan Herman <hermanjl@cs.unc.edu> | 2013-01-22 10:38:37 -0500 |
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committer | Jonathan Herman <hermanjl@cs.unc.edu> | 2013-01-22 10:38:37 -0500 |
commit | fcc9d2e5a6c89d22b8b773a64fb4ad21ac318446 (patch) | |
tree | a57612d1888735a2ec7972891b68c1ac5ec8faea /drivers/net/wireless/wl1251/io.c | |
parent | 8dea78da5cee153b8af9c07a2745f6c55057fe12 (diff) |
Diffstat (limited to 'drivers/net/wireless/wl1251/io.c')
-rw-r--r-- | drivers/net/wireless/wl1251/io.c | 194 |
1 files changed, 194 insertions, 0 deletions
diff --git a/drivers/net/wireless/wl1251/io.c b/drivers/net/wireless/wl1251/io.c new file mode 100644 index 00000000000..cdcadbf6ac2 --- /dev/null +++ b/drivers/net/wireless/wl1251/io.c | |||
@@ -0,0 +1,194 @@ | |||
1 | /* | ||
2 | * This file is part of wl12xx | ||
3 | * | ||
4 | * Copyright (C) 2008 Nokia Corporation | ||
5 | * | ||
6 | * This program is free software; you can redistribute it and/or | ||
7 | * modify it under the terms of the GNU General Public License | ||
8 | * version 2 as published by the Free Software Foundation. | ||
9 | * | ||
10 | * This program is distributed in the hope that it will be useful, but | ||
11 | * WITHOUT ANY WARRANTY; without even the implied warranty of | ||
12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | ||
13 | * General Public License for more details. | ||
14 | * | ||
15 | * You should have received a copy of the GNU General Public License | ||
16 | * along with this program; if not, write to the Free Software | ||
17 | * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA | ||
18 | * 02110-1301 USA | ||
19 | * | ||
20 | */ | ||
21 | |||
22 | #include "wl1251.h" | ||
23 | #include "reg.h" | ||
24 | #include "io.h" | ||
25 | |||
26 | /* FIXME: this is static data nowadays and the table can be removed */ | ||
27 | static enum wl12xx_acx_int_reg wl1251_io_reg_table[ACX_REG_TABLE_LEN] = { | ||
28 | [ACX_REG_INTERRUPT_TRIG] = (REGISTERS_BASE + 0x0474), | ||
29 | [ACX_REG_INTERRUPT_TRIG_H] = (REGISTERS_BASE + 0x0478), | ||
30 | [ACX_REG_INTERRUPT_MASK] = (REGISTERS_BASE + 0x0494), | ||
31 | [ACX_REG_HINT_MASK_SET] = (REGISTERS_BASE + 0x0498), | ||
32 | [ACX_REG_HINT_MASK_CLR] = (REGISTERS_BASE + 0x049C), | ||
33 | [ACX_REG_INTERRUPT_NO_CLEAR] = (REGISTERS_BASE + 0x04B0), | ||
34 | [ACX_REG_INTERRUPT_CLEAR] = (REGISTERS_BASE + 0x04A4), | ||
35 | [ACX_REG_INTERRUPT_ACK] = (REGISTERS_BASE + 0x04A8), | ||
36 | [ACX_REG_SLV_SOFT_RESET] = (REGISTERS_BASE + 0x0000), | ||
37 | [ACX_REG_EE_START] = (REGISTERS_BASE + 0x080C), | ||
38 | [ACX_REG_ECPU_CONTROL] = (REGISTERS_BASE + 0x0804) | ||
39 | }; | ||
40 | |||
41 | static int wl1251_translate_reg_addr(struct wl1251 *wl, int addr) | ||
42 | { | ||
43 | /* If the address is lower than REGISTERS_BASE, it means that this is | ||
44 | * a chip-specific register address, so look it up in the registers | ||
45 | * table */ | ||
46 | if (addr < REGISTERS_BASE) { | ||
47 | /* Make sure we don't go over the table */ | ||
48 | if (addr >= ACX_REG_TABLE_LEN) { | ||
49 | wl1251_error("address out of range (%d)", addr); | ||
50 | return -EINVAL; | ||
51 | } | ||
52 | addr = wl1251_io_reg_table[addr]; | ||
53 | } | ||
54 | |||
55 | return addr - wl->physical_reg_addr + wl->virtual_reg_addr; | ||
56 | } | ||
57 | |||
58 | static int wl1251_translate_mem_addr(struct wl1251 *wl, int addr) | ||
59 | { | ||
60 | return addr - wl->physical_mem_addr + wl->virtual_mem_addr; | ||
61 | } | ||
62 | |||
63 | void wl1251_mem_read(struct wl1251 *wl, int addr, void *buf, size_t len) | ||
64 | { | ||
65 | int physical; | ||
66 | |||
67 | physical = wl1251_translate_mem_addr(wl, addr); | ||
68 | |||
69 | wl->if_ops->read(wl, physical, buf, len); | ||
70 | } | ||
71 | |||
72 | void wl1251_mem_write(struct wl1251 *wl, int addr, void *buf, size_t len) | ||
73 | { | ||
74 | int physical; | ||
75 | |||
76 | physical = wl1251_translate_mem_addr(wl, addr); | ||
77 | |||
78 | wl->if_ops->write(wl, physical, buf, len); | ||
79 | } | ||
80 | |||
81 | u32 wl1251_mem_read32(struct wl1251 *wl, int addr) | ||
82 | { | ||
83 | return wl1251_read32(wl, wl1251_translate_mem_addr(wl, addr)); | ||
84 | } | ||
85 | |||
86 | void wl1251_mem_write32(struct wl1251 *wl, int addr, u32 val) | ||
87 | { | ||
88 | wl1251_write32(wl, wl1251_translate_mem_addr(wl, addr), val); | ||
89 | } | ||
90 | |||
91 | u32 wl1251_reg_read32(struct wl1251 *wl, int addr) | ||
92 | { | ||
93 | return wl1251_read32(wl, wl1251_translate_reg_addr(wl, addr)); | ||
94 | } | ||
95 | |||
96 | void wl1251_reg_write32(struct wl1251 *wl, int addr, u32 val) | ||
97 | { | ||
98 | wl1251_write32(wl, wl1251_translate_reg_addr(wl, addr), val); | ||
99 | } | ||
100 | |||
101 | /* Set the partitions to access the chip addresses. | ||
102 | * | ||
103 | * There are two VIRTUAL partitions (the memory partition and the | ||
104 | * registers partition), which are mapped to two different areas of the | ||
105 | * PHYSICAL (hardware) memory. This function also makes other checks to | ||
106 | * ensure that the partitions are not overlapping. In the diagram below, the | ||
107 | * memory partition comes before the register partition, but the opposite is | ||
108 | * also supported. | ||
109 | * | ||
110 | * PHYSICAL address | ||
111 | * space | ||
112 | * | ||
113 | * | | | ||
114 | * ...+----+--> mem_start | ||
115 | * VIRTUAL address ... | | | ||
116 | * space ... | | [PART_0] | ||
117 | * ... | | | ||
118 | * 0x00000000 <--+----+... ...+----+--> mem_start + mem_size | ||
119 | * | | ... | | | ||
120 | * |MEM | ... | | | ||
121 | * | | ... | | | ||
122 | * part_size <--+----+... | | {unused area) | ||
123 | * | | ... | | | ||
124 | * |REG | ... | | | ||
125 | * part_size | | ... | | | ||
126 | * + <--+----+... ...+----+--> reg_start | ||
127 | * reg_size ... | | | ||
128 | * ... | | [PART_1] | ||
129 | * ... | | | ||
130 | * ...+----+--> reg_start + reg_size | ||
131 | * | | | ||
132 | * | ||
133 | */ | ||
134 | void wl1251_set_partition(struct wl1251 *wl, | ||
135 | u32 mem_start, u32 mem_size, | ||
136 | u32 reg_start, u32 reg_size) | ||
137 | { | ||
138 | struct wl1251_partition partition[2]; | ||
139 | |||
140 | wl1251_debug(DEBUG_SPI, "mem_start %08X mem_size %08X", | ||
141 | mem_start, mem_size); | ||
142 | wl1251_debug(DEBUG_SPI, "reg_start %08X reg_size %08X", | ||
143 | reg_start, reg_size); | ||
144 | |||
145 | /* Make sure that the two partitions together don't exceed the | ||
146 | * address range */ | ||
147 | if ((mem_size + reg_size) > HW_ACCESS_MEMORY_MAX_RANGE) { | ||
148 | wl1251_debug(DEBUG_SPI, "Total size exceeds maximum virtual" | ||
149 | " address range. Truncating partition[0]."); | ||
150 | mem_size = HW_ACCESS_MEMORY_MAX_RANGE - reg_size; | ||
151 | wl1251_debug(DEBUG_SPI, "mem_start %08X mem_size %08X", | ||
152 | mem_start, mem_size); | ||
153 | wl1251_debug(DEBUG_SPI, "reg_start %08X reg_size %08X", | ||
154 | reg_start, reg_size); | ||
155 | } | ||
156 | |||
157 | if ((mem_start < reg_start) && | ||
158 | ((mem_start + mem_size) > reg_start)) { | ||
159 | /* Guarantee that the memory partition doesn't overlap the | ||
160 | * registers partition */ | ||
161 | wl1251_debug(DEBUG_SPI, "End of partition[0] is " | ||
162 | "overlapping partition[1]. Adjusted."); | ||
163 | mem_size = reg_start - mem_start; | ||
164 | wl1251_debug(DEBUG_SPI, "mem_start %08X mem_size %08X", | ||
165 | mem_start, mem_size); | ||
166 | wl1251_debug(DEBUG_SPI, "reg_start %08X reg_size %08X", | ||
167 | reg_start, reg_size); | ||
168 | } else if ((reg_start < mem_start) && | ||
169 | ((reg_start + reg_size) > mem_start)) { | ||
170 | /* Guarantee that the register partition doesn't overlap the | ||
171 | * memory partition */ | ||
172 | wl1251_debug(DEBUG_SPI, "End of partition[1] is" | ||
173 | " overlapping partition[0]. Adjusted."); | ||
174 | reg_size = mem_start - reg_start; | ||
175 | wl1251_debug(DEBUG_SPI, "mem_start %08X mem_size %08X", | ||
176 | mem_start, mem_size); | ||
177 | wl1251_debug(DEBUG_SPI, "reg_start %08X reg_size %08X", | ||
178 | reg_start, reg_size); | ||
179 | } | ||
180 | |||
181 | partition[0].start = mem_start; | ||
182 | partition[0].size = mem_size; | ||
183 | partition[1].start = reg_start; | ||
184 | partition[1].size = reg_size; | ||
185 | |||
186 | wl->physical_mem_addr = mem_start; | ||
187 | wl->physical_reg_addr = reg_start; | ||
188 | |||
189 | wl->virtual_mem_addr = 0; | ||
190 | wl->virtual_reg_addr = mem_size; | ||
191 | |||
192 | wl->if_ops->write(wl, HW_ACCESS_PART0_SIZE_ADDR, partition, | ||
193 | sizeof(partition)); | ||
194 | } | ||