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
wl1251_translate_reg_addr(struct wl1251 * wl,int addr)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
wl1251_translate_mem_addr(struct wl1251 * wl,int addr)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
wl1251_mem_read(struct wl1251 * wl,int addr,void * buf,size_t len)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
wl1251_mem_write(struct wl1251 * wl,int addr,void * buf,size_t len)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
wl1251_mem_read32(struct wl1251 * wl,int addr)81 u32 wl1251_mem_read32(struct wl1251 *wl, int addr)
82 {
83 return wl1251_read32(wl, wl1251_translate_mem_addr(wl, addr));
84 }
85
wl1251_mem_write32(struct wl1251 * wl,int addr,u32 val)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
wl1251_reg_read32(struct wl1251 * wl,int addr)91 u32 wl1251_reg_read32(struct wl1251 *wl, int addr)
92 {
93 return wl1251_read32(wl, wl1251_translate_reg_addr(wl, addr));
94 }
95
wl1251_reg_write32(struct wl1251 * wl,int addr,u32 val)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 */
wl1251_set_partition(struct wl1251 * wl,u32 mem_start,u32 mem_size,u32 reg_start,u32 reg_size)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 }
195