1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * This file is part of wl12xx
4 *
5 * Copyright (C) 2008 Nokia Corporation
6 */
7
8#include "wl1251.h"
9#include "reg.h"
10#include "io.h"
11
12/* FIXME: this is static data nowadays and the table can be removed */
13static enum wl12xx_acx_int_reg wl1251_io_reg_table[ACX_REG_TABLE_LEN] = {
14 [ACX_REG_INTERRUPT_TRIG] = (REGISTERS_BASE + 0x0474),
15 [ACX_REG_INTERRUPT_TRIG_H] = (REGISTERS_BASE + 0x0478),
16 [ACX_REG_INTERRUPT_MASK] = (REGISTERS_BASE + 0x0494),
17 [ACX_REG_HINT_MASK_SET] = (REGISTERS_BASE + 0x0498),
18 [ACX_REG_HINT_MASK_CLR] = (REGISTERS_BASE + 0x049C),
19 [ACX_REG_INTERRUPT_NO_CLEAR] = (REGISTERS_BASE + 0x04B0),
20 [ACX_REG_INTERRUPT_CLEAR] = (REGISTERS_BASE + 0x04A4),
21 [ACX_REG_INTERRUPT_ACK] = (REGISTERS_BASE + 0x04A8),
22 [ACX_REG_SLV_SOFT_RESET] = (REGISTERS_BASE + 0x0000),
23 [ACX_REG_EE_START] = (REGISTERS_BASE + 0x080C),
24 [ACX_REG_ECPU_CONTROL] = (REGISTERS_BASE + 0x0804)
25};
26
27static int wl1251_translate_reg_addr(struct wl1251 *wl, int addr)
28{
29 /* If the address is lower than REGISTERS_BASE, it means that this is
30 * a chip-specific register address, so look it up in the registers
31 * table */
32 if (addr < REGISTERS_BASE) {
33 /* Make sure we don't go over the table */
34 if (addr >= ACX_REG_TABLE_LEN) {
35 wl1251_error("address out of range (%d)", addr);
36 return -EINVAL;
37 }
38 addr = wl1251_io_reg_table[addr];
39 }
40
41 return addr - wl->physical_reg_addr + wl->virtual_reg_addr;
42}
43
44static int wl1251_translate_mem_addr(struct wl1251 *wl, int addr)
45{
46 return addr - wl->physical_mem_addr + wl->virtual_mem_addr;
47}
48
49void wl1251_mem_read(struct wl1251 *wl, int addr, void *buf, size_t len)
50{
51 int physical;
52
53 physical = wl1251_translate_mem_addr(wl, addr);
54
55 wl->if_ops->read(wl, physical, buf, len);
56}
57
58void wl1251_mem_write(struct wl1251 *wl, int addr, void *buf, size_t len)
59{
60 int physical;
61
62 physical = wl1251_translate_mem_addr(wl, addr);
63
64 wl->if_ops->write(wl, physical, buf, len);
65}
66
67u32 wl1251_mem_read32(struct wl1251 *wl, int addr)
68{
69 return wl1251_read32(wl, addr: wl1251_translate_mem_addr(wl, addr));
70}
71
72void wl1251_mem_write32(struct wl1251 *wl, int addr, u32 val)
73{
74 wl1251_write32(wl, addr: wl1251_translate_mem_addr(wl, addr), val);
75}
76
77u32 wl1251_reg_read32(struct wl1251 *wl, int addr)
78{
79 return wl1251_read32(wl, addr: wl1251_translate_reg_addr(wl, addr));
80}
81
82void wl1251_reg_write32(struct wl1251 *wl, int addr, u32 val)
83{
84 wl1251_write32(wl, addr: wl1251_translate_reg_addr(wl, addr), val);
85}
86
87/* Set the partitions to access the chip addresses.
88 *
89 * There are two VIRTUAL partitions (the memory partition and the
90 * registers partition), which are mapped to two different areas of the
91 * PHYSICAL (hardware) memory. This function also makes other checks to
92 * ensure that the partitions are not overlapping. In the diagram below, the
93 * memory partition comes before the register partition, but the opposite is
94 * also supported.
95 *
96 * PHYSICAL address
97 * space
98 *
99 * | |
100 * ...+----+--> mem_start
101 * VIRTUAL address ... | |
102 * space ... | | [PART_0]
103 * ... | |
104 * 0x00000000 <--+----+... ...+----+--> mem_start + mem_size
105 * | | ... | |
106 * |MEM | ... | |
107 * | | ... | |
108 * part_size <--+----+... | | {unused area)
109 * | | ... | |
110 * |REG | ... | |
111 * part_size | | ... | |
112 * + <--+----+... ...+----+--> reg_start
113 * reg_size ... | |
114 * ... | | [PART_1]
115 * ... | |
116 * ...+----+--> reg_start + reg_size
117 * | |
118 *
119 */
120void wl1251_set_partition(struct wl1251 *wl,
121 u32 mem_start, u32 mem_size,
122 u32 reg_start, u32 reg_size)
123{
124 struct wl1251_partition_set *partition;
125
126 partition = kmalloc(size: sizeof(*partition), GFP_KERNEL);
127 if (!partition) {
128 wl1251_error("can not allocate partition buffer");
129 return;
130 }
131
132 wl1251_debug(DEBUG_SPI, "mem_start %08X mem_size %08X",
133 mem_start, mem_size);
134 wl1251_debug(DEBUG_SPI, "reg_start %08X reg_size %08X",
135 reg_start, reg_size);
136
137 /* Make sure that the two partitions together don't exceed the
138 * address range */
139 if ((mem_size + reg_size) > HW_ACCESS_MEMORY_MAX_RANGE) {
140 wl1251_debug(DEBUG_SPI, "Total size exceeds maximum virtual"
141 " address range. Truncating partition[0].");
142 mem_size = HW_ACCESS_MEMORY_MAX_RANGE - reg_size;
143 wl1251_debug(DEBUG_SPI, "mem_start %08X mem_size %08X",
144 mem_start, mem_size);
145 wl1251_debug(DEBUG_SPI, "reg_start %08X reg_size %08X",
146 reg_start, reg_size);
147 }
148
149 if ((mem_start < reg_start) &&
150 ((mem_start + mem_size) > reg_start)) {
151 /* Guarantee that the memory partition doesn't overlap the
152 * registers partition */
153 wl1251_debug(DEBUG_SPI, "End of partition[0] is "
154 "overlapping partition[1]. Adjusted.");
155 mem_size = reg_start - mem_start;
156 wl1251_debug(DEBUG_SPI, "mem_start %08X mem_size %08X",
157 mem_start, mem_size);
158 wl1251_debug(DEBUG_SPI, "reg_start %08X reg_size %08X",
159 reg_start, reg_size);
160 } else if ((reg_start < mem_start) &&
161 ((reg_start + reg_size) > mem_start)) {
162 /* Guarantee that the register partition doesn't overlap the
163 * memory partition */
164 wl1251_debug(DEBUG_SPI, "End of partition[1] is"
165 " overlapping partition[0]. Adjusted.");
166 reg_size = mem_start - reg_start;
167 wl1251_debug(DEBUG_SPI, "mem_start %08X mem_size %08X",
168 mem_start, mem_size);
169 wl1251_debug(DEBUG_SPI, "reg_start %08X reg_size %08X",
170 reg_start, reg_size);
171 }
172
173 partition->mem.start = mem_start;
174 partition->mem.size = mem_size;
175 partition->reg.start = reg_start;
176 partition->reg.size = reg_size;
177
178 wl->physical_mem_addr = mem_start;
179 wl->physical_reg_addr = reg_start;
180
181 wl->virtual_mem_addr = 0;
182 wl->virtual_reg_addr = mem_size;
183
184 wl->if_ops->write(wl, HW_ACCESS_PART0_SIZE_ADDR, partition,
185 sizeof(*partition));
186
187 kfree(objp: partition);
188}
189

source code of linux/drivers/net/wireless/ti/wl1251/io.c