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 */
13 static 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
wl1251_translate_reg_addr(struct wl1251 * wl,int addr)27 static 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
wl1251_translate_mem_addr(struct wl1251 * wl,int addr)44 static int wl1251_translate_mem_addr(struct wl1251 *wl, int addr)
45 {
46 return addr - wl->physical_mem_addr + wl->virtual_mem_addr;
47 }
48
wl1251_mem_read(struct wl1251 * wl,int addr,void * buf,size_t len)49 void 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
wl1251_mem_write(struct wl1251 * wl,int addr,void * buf,size_t len)58 void 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
wl1251_mem_read32(struct wl1251 * wl,int addr)67 u32 wl1251_mem_read32(struct wl1251 *wl, int addr)
68 {
69 return wl1251_read32(wl, wl1251_translate_mem_addr(wl, addr));
70 }
71
wl1251_mem_write32(struct wl1251 * wl,int addr,u32 val)72 void wl1251_mem_write32(struct wl1251 *wl, int addr, u32 val)
73 {
74 wl1251_write32(wl, wl1251_translate_mem_addr(wl, addr), val);
75 }
76
wl1251_reg_read32(struct wl1251 * wl,int addr)77 u32 wl1251_reg_read32(struct wl1251 *wl, int addr)
78 {
79 return wl1251_read32(wl, wl1251_translate_reg_addr(wl, addr));
80 }
81
wl1251_reg_write32(struct wl1251 * wl,int addr,u32 val)82 void wl1251_reg_write32(struct wl1251 *wl, int addr, u32 val)
83 {
84 wl1251_write32(wl, 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 */
wl1251_set_partition(struct wl1251 * wl,u32 mem_start,u32 mem_size,u32 reg_start,u32 reg_size)120 void 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 partition[2];
125
126 wl1251_debug(DEBUG_SPI, "mem_start %08X mem_size %08X",
127 mem_start, mem_size);
128 wl1251_debug(DEBUG_SPI, "reg_start %08X reg_size %08X",
129 reg_start, reg_size);
130
131 /* Make sure that the two partitions together don't exceed the
132 * address range */
133 if ((mem_size + reg_size) > HW_ACCESS_MEMORY_MAX_RANGE) {
134 wl1251_debug(DEBUG_SPI, "Total size exceeds maximum virtual"
135 " address range. Truncating partition[0].");
136 mem_size = HW_ACCESS_MEMORY_MAX_RANGE - reg_size;
137 wl1251_debug(DEBUG_SPI, "mem_start %08X mem_size %08X",
138 mem_start, mem_size);
139 wl1251_debug(DEBUG_SPI, "reg_start %08X reg_size %08X",
140 reg_start, reg_size);
141 }
142
143 if ((mem_start < reg_start) &&
144 ((mem_start + mem_size) > reg_start)) {
145 /* Guarantee that the memory partition doesn't overlap the
146 * registers partition */
147 wl1251_debug(DEBUG_SPI, "End of partition[0] is "
148 "overlapping partition[1]. Adjusted.");
149 mem_size = reg_start - mem_start;
150 wl1251_debug(DEBUG_SPI, "mem_start %08X mem_size %08X",
151 mem_start, mem_size);
152 wl1251_debug(DEBUG_SPI, "reg_start %08X reg_size %08X",
153 reg_start, reg_size);
154 } else if ((reg_start < mem_start) &&
155 ((reg_start + reg_size) > mem_start)) {
156 /* Guarantee that the register partition doesn't overlap the
157 * memory partition */
158 wl1251_debug(DEBUG_SPI, "End of partition[1] is"
159 " overlapping partition[0]. Adjusted.");
160 reg_size = mem_start - reg_start;
161 wl1251_debug(DEBUG_SPI, "mem_start %08X mem_size %08X",
162 mem_start, mem_size);
163 wl1251_debug(DEBUG_SPI, "reg_start %08X reg_size %08X",
164 reg_start, reg_size);
165 }
166
167 partition[0].start = mem_start;
168 partition[0].size = mem_size;
169 partition[1].start = reg_start;
170 partition[1].size = reg_size;
171
172 wl->physical_mem_addr = mem_start;
173 wl->physical_reg_addr = reg_start;
174
175 wl->virtual_mem_addr = 0;
176 wl->virtual_reg_addr = mem_size;
177
178 wl->if_ops->write(wl, HW_ACCESS_PART0_SIZE_ADDR, partition,
179 sizeof(partition));
180 }
181