xref: /openbmc/linux/drivers/net/wireless/ti/wlcore/io.c (revision 2b27bdcc)
1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3  * This file is part of wl1271
4  *
5  * Copyright (C) 2008-2010 Nokia Corporation
6  *
7  * Contact: Luciano Coelho <luciano.coelho@nokia.com>
8  */
9 
10 #include <linux/module.h>
11 #include <linux/platform_device.h>
12 #include <linux/spi/spi.h>
13 #include <linux/interrupt.h>
14 
15 #include "wlcore.h"
16 #include "debug.h"
17 #include "wl12xx_80211.h"
18 #include "io.h"
19 #include "tx.h"
20 
wl1271_set_block_size(struct wl1271 * wl)21 bool wl1271_set_block_size(struct wl1271 *wl)
22 {
23 	if (wl->if_ops->set_block_size) {
24 		wl->if_ops->set_block_size(wl->dev, WL12XX_BUS_BLOCK_SIZE);
25 		return true;
26 	}
27 
28 	return false;
29 }
30 
wlcore_disable_interrupts(struct wl1271 * wl)31 void wlcore_disable_interrupts(struct wl1271 *wl)
32 {
33 	disable_irq(wl->irq);
34 }
35 EXPORT_SYMBOL_GPL(wlcore_disable_interrupts);
36 
wlcore_disable_interrupts_nosync(struct wl1271 * wl)37 void wlcore_disable_interrupts_nosync(struct wl1271 *wl)
38 {
39 	disable_irq_nosync(wl->irq);
40 }
41 EXPORT_SYMBOL_GPL(wlcore_disable_interrupts_nosync);
42 
wlcore_enable_interrupts(struct wl1271 * wl)43 void wlcore_enable_interrupts(struct wl1271 *wl)
44 {
45 	enable_irq(wl->irq);
46 }
47 EXPORT_SYMBOL_GPL(wlcore_enable_interrupts);
48 
wlcore_synchronize_interrupts(struct wl1271 * wl)49 void wlcore_synchronize_interrupts(struct wl1271 *wl)
50 {
51 	synchronize_irq(wl->irq);
52 }
53 EXPORT_SYMBOL_GPL(wlcore_synchronize_interrupts);
54 
wlcore_translate_addr(struct wl1271 * wl,int addr)55 int wlcore_translate_addr(struct wl1271 *wl, int addr)
56 {
57 	struct wlcore_partition_set *part = &wl->curr_part;
58 
59 	/*
60 	 * To translate, first check to which window of addresses the
61 	 * particular address belongs. Then subtract the starting address
62 	 * of that window from the address. Then, add offset of the
63 	 * translated region.
64 	 *
65 	 * The translated regions occur next to each other in physical device
66 	 * memory, so just add the sizes of the preceding address regions to
67 	 * get the offset to the new region.
68 	 */
69 	if ((addr >= part->mem.start) &&
70 	    (addr < part->mem.start + part->mem.size))
71 		return addr - part->mem.start;
72 	else if ((addr >= part->reg.start) &&
73 		 (addr < part->reg.start + part->reg.size))
74 		return addr - part->reg.start + part->mem.size;
75 	else if ((addr >= part->mem2.start) &&
76 		 (addr < part->mem2.start + part->mem2.size))
77 		return addr - part->mem2.start + part->mem.size +
78 			part->reg.size;
79 	else if ((addr >= part->mem3.start) &&
80 		 (addr < part->mem3.start + part->mem3.size))
81 		return addr - part->mem3.start + part->mem.size +
82 			part->reg.size + part->mem2.size;
83 
84 	WARN(1, "HW address 0x%x out of range", addr);
85 	return 0;
86 }
87 EXPORT_SYMBOL_GPL(wlcore_translate_addr);
88 
89 /* Set the partitions to access the chip addresses
90  *
91  * To simplify driver code, a fixed (virtual) memory map is defined for
92  * register and memory addresses. Because in the chipset, in different stages
93  * of operation, those addresses will move around, an address translation
94  * mechanism is required.
95  *
96  * There are four partitions (three memory and one register partition),
97  * which are mapped to two different areas of the hardware memory.
98  *
99  *                                Virtual address
100  *                                     space
101  *
102  *                                    |    |
103  *                                 ...+----+--> mem.start
104  *          Physical address    ...   |    |
105  *               space       ...      |    | [PART_0]
106  *                        ...         |    |
107  *  00000000  <--+----+...         ...+----+--> mem.start + mem.size
108  *               |    |         ...   |    |
109  *               |MEM |      ...      |    |
110  *               |    |   ...         |    |
111  *  mem.size  <--+----+...            |    | {unused area)
112  *               |    |   ...         |    |
113  *               |REG |      ...      |    |
114  *  mem.size     |    |         ...   |    |
115  *      +     <--+----+...         ...+----+--> reg.start
116  *  reg.size     |    |   ...         |    |
117  *               |MEM2|      ...      |    | [PART_1]
118  *               |    |         ...   |    |
119  *                                 ...+----+--> reg.start + reg.size
120  *                                    |    |
121  *
122  */
wlcore_set_partition(struct wl1271 * wl,const struct wlcore_partition_set * p)123 int wlcore_set_partition(struct wl1271 *wl,
124 			 const struct wlcore_partition_set *p)
125 {
126 	int ret;
127 
128 	/* copy partition info */
129 	memcpy(&wl->curr_part, p, sizeof(*p));
130 
131 	wl1271_debug(DEBUG_IO, "mem_start %08X mem_size %08X",
132 		     p->mem.start, p->mem.size);
133 	wl1271_debug(DEBUG_IO, "reg_start %08X reg_size %08X",
134 		     p->reg.start, p->reg.size);
135 	wl1271_debug(DEBUG_IO, "mem2_start %08X mem2_size %08X",
136 		     p->mem2.start, p->mem2.size);
137 	wl1271_debug(DEBUG_IO, "mem3_start %08X mem3_size %08X",
138 		     p->mem3.start, p->mem3.size);
139 
140 	ret = wlcore_raw_write32(wl, HW_PART0_START_ADDR, p->mem.start);
141 	if (ret < 0)
142 		goto out;
143 
144 	ret = wlcore_raw_write32(wl, HW_PART0_SIZE_ADDR, p->mem.size);
145 	if (ret < 0)
146 		goto out;
147 
148 	ret = wlcore_raw_write32(wl, HW_PART1_START_ADDR, p->reg.start);
149 	if (ret < 0)
150 		goto out;
151 
152 	ret = wlcore_raw_write32(wl, HW_PART1_SIZE_ADDR, p->reg.size);
153 	if (ret < 0)
154 		goto out;
155 
156 	ret = wlcore_raw_write32(wl, HW_PART2_START_ADDR, p->mem2.start);
157 	if (ret < 0)
158 		goto out;
159 
160 	ret = wlcore_raw_write32(wl, HW_PART2_SIZE_ADDR, p->mem2.size);
161 	if (ret < 0)
162 		goto out;
163 
164 	/* wl12xx only: We don't need the size of the last partition,
165 	 * as it is automatically calculated based on the total memory
166 	 * size and the sizes of the previous partitions.
167 	 *
168 	 * wl18xx re-defines the HW_PART3 addresses for logger over
169 	 * SDIO support. wl12xx is expecting the write to
170 	 * HW_PART3_START_ADDR at offset 24. This creates conflict
171 	 * between the addresses.
172 	 * In order to fix this the expected value is written to
173 	 * HW_PART3_SIZE_ADDR instead which is at offset 24 after changes.
174 	 */
175 	ret = wlcore_raw_write32(wl, HW_PART3_START_ADDR, p->mem3.start);
176 	if (ret < 0)
177 		goto out;
178 
179 	ret = wlcore_raw_write32(wl, HW_PART3_SIZE_ADDR, p->mem3.size);
180 	if (ret < 0)
181 		goto out;
182 
183 out:
184 	return ret;
185 }
186 EXPORT_SYMBOL_GPL(wlcore_set_partition);
187 
wl1271_io_reset(struct wl1271 * wl)188 void wl1271_io_reset(struct wl1271 *wl)
189 {
190 	if (wl->if_ops->reset)
191 		wl->if_ops->reset(wl->dev);
192 }
193 
wl1271_io_init(struct wl1271 * wl)194 void wl1271_io_init(struct wl1271 *wl)
195 {
196 	if (wl->if_ops->init)
197 		wl->if_ops->init(wl->dev);
198 }
199