1/*
2 * This file is part of wl1271
3 *
4 * Copyright (C) 2008-2010 Nokia Corporation
5 *
6 * Contact: Luciano Coelho <luciano.coelho@nokia.com>
7 *
8 * This program is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU General Public License
10 * version 2 as published by the Free Software Foundation.
11 *
12 * This program is distributed in the hope that it will be useful, but
13 * WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
15 * General Public License for more details.
16 *
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
20 * 02110-1301 USA
21 *
22 */
23
24#include <linux/module.h>
25#include <linux/platform_device.h>
26#include <linux/spi/spi.h>
27#include <linux/interrupt.h>
28
29#include "wlcore.h"
30#include "debug.h"
31#include "wl12xx_80211.h"
32#include "io.h"
33#include "tx.h"
34
35bool wl1271_set_block_size(struct wl1271 *wl)
36{
37	if (wl->if_ops->set_block_size) {
38		wl->if_ops->set_block_size(wl->dev, WL12XX_BUS_BLOCK_SIZE);
39		return true;
40	}
41
42	return false;
43}
44
45void wlcore_disable_interrupts(struct wl1271 *wl)
46{
47	disable_irq(wl->irq);
48}
49EXPORT_SYMBOL_GPL(wlcore_disable_interrupts);
50
51void wlcore_disable_interrupts_nosync(struct wl1271 *wl)
52{
53	disable_irq_nosync(wl->irq);
54}
55EXPORT_SYMBOL_GPL(wlcore_disable_interrupts_nosync);
56
57void wlcore_enable_interrupts(struct wl1271 *wl)
58{
59	enable_irq(wl->irq);
60}
61EXPORT_SYMBOL_GPL(wlcore_enable_interrupts);
62
63void wlcore_synchronize_interrupts(struct wl1271 *wl)
64{
65	synchronize_irq(wl->irq);
66}
67EXPORT_SYMBOL_GPL(wlcore_synchronize_interrupts);
68
69int wlcore_translate_addr(struct wl1271 *wl, int addr)
70{
71	struct wlcore_partition_set *part = &wl->curr_part;
72
73	/*
74	 * To translate, first check to which window of addresses the
75	 * particular address belongs. Then subtract the starting address
76	 * of that window from the address. Then, add offset of the
77	 * translated region.
78	 *
79	 * The translated regions occur next to each other in physical device
80	 * memory, so just add the sizes of the preceding address regions to
81	 * get the offset to the new region.
82	 */
83	if ((addr >= part->mem.start) &&
84	    (addr < part->mem.start + part->mem.size))
85		return addr - part->mem.start;
86	else if ((addr >= part->reg.start) &&
87		 (addr < part->reg.start + part->reg.size))
88		return addr - part->reg.start + part->mem.size;
89	else if ((addr >= part->mem2.start) &&
90		 (addr < part->mem2.start + part->mem2.size))
91		return addr - part->mem2.start + part->mem.size +
92			part->reg.size;
93	else if ((addr >= part->mem3.start) &&
94		 (addr < part->mem3.start + part->mem3.size))
95		return addr - part->mem3.start + part->mem.size +
96			part->reg.size + part->mem2.size;
97
98	WARN(1, "HW address 0x%x out of range", addr);
99	return 0;
100}
101EXPORT_SYMBOL_GPL(wlcore_translate_addr);
102
103/* Set the partitions to access the chip addresses
104 *
105 * To simplify driver code, a fixed (virtual) memory map is defined for
106 * register and memory addresses. Because in the chipset, in different stages
107 * of operation, those addresses will move around, an address translation
108 * mechanism is required.
109 *
110 * There are four partitions (three memory and one register partition),
111 * which are mapped to two different areas of the hardware memory.
112 *
113 *                                Virtual address
114 *                                     space
115 *
116 *                                    |    |
117 *                                 ...+----+--> mem.start
118 *          Physical address    ...   |    |
119 *               space       ...      |    | [PART_0]
120 *                        ...         |    |
121 *  00000000  <--+----+...         ...+----+--> mem.start + mem.size
122 *               |    |         ...   |    |
123 *               |MEM |      ...      |    |
124 *               |    |   ...         |    |
125 *  mem.size  <--+----+...            |    | {unused area)
126 *               |    |   ...         |    |
127 *               |REG |      ...      |    |
128 *  mem.size     |    |         ...   |    |
129 *      +     <--+----+...         ...+----+--> reg.start
130 *  reg.size     |    |   ...         |    |
131 *               |MEM2|      ...      |    | [PART_1]
132 *               |    |         ...   |    |
133 *                                 ...+----+--> reg.start + reg.size
134 *                                    |    |
135 *
136 */
137int wlcore_set_partition(struct wl1271 *wl,
138			 const struct wlcore_partition_set *p)
139{
140	int ret;
141
142	/* copy partition info */
143	memcpy(&wl->curr_part, p, sizeof(*p));
144
145	wl1271_debug(DEBUG_IO, "mem_start %08X mem_size %08X",
146		     p->mem.start, p->mem.size);
147	wl1271_debug(DEBUG_IO, "reg_start %08X reg_size %08X",
148		     p->reg.start, p->reg.size);
149	wl1271_debug(DEBUG_IO, "mem2_start %08X mem2_size %08X",
150		     p->mem2.start, p->mem2.size);
151	wl1271_debug(DEBUG_IO, "mem3_start %08X mem3_size %08X",
152		     p->mem3.start, p->mem3.size);
153
154	ret = wlcore_raw_write32(wl, HW_PART0_START_ADDR, p->mem.start);
155	if (ret < 0)
156		goto out;
157
158	ret = wlcore_raw_write32(wl, HW_PART0_SIZE_ADDR, p->mem.size);
159	if (ret < 0)
160		goto out;
161
162	ret = wlcore_raw_write32(wl, HW_PART1_START_ADDR, p->reg.start);
163	if (ret < 0)
164		goto out;
165
166	ret = wlcore_raw_write32(wl, HW_PART1_SIZE_ADDR, p->reg.size);
167	if (ret < 0)
168		goto out;
169
170	ret = wlcore_raw_write32(wl, HW_PART2_START_ADDR, p->mem2.start);
171	if (ret < 0)
172		goto out;
173
174	ret = wlcore_raw_write32(wl, HW_PART2_SIZE_ADDR, p->mem2.size);
175	if (ret < 0)
176		goto out;
177
178	/*
179	 * We don't need the size of the last partition, as it is
180	 * automatically calculated based on the total memory size and
181	 * the sizes of the previous partitions.
182	 */
183	ret = wlcore_raw_write32(wl, HW_PART3_START_ADDR, p->mem3.start);
184
185out:
186	return ret;
187}
188EXPORT_SYMBOL_GPL(wlcore_set_partition);
189
190void wl1271_io_reset(struct wl1271 *wl)
191{
192	if (wl->if_ops->reset)
193		wl->if_ops->reset(wl->dev);
194}
195
196void wl1271_io_init(struct wl1271 *wl)
197{
198	if (wl->if_ops->init)
199		wl->if_ops->init(wl->dev);
200}
201