1/*
2 * Copyright (c) 2008-2011 Atheros Communications Inc.
3 * Copyright (c) 2009 Gabor Juhos <juhosg@openwrt.org>
4 * Copyright (c) 2009 Imre Kaloz <kaloz@openwrt.org>
5 *
6 * Permission to use, copy, modify, and/or distribute this software for any
7 * purpose with or without fee is hereby granted, provided that the above
8 * copyright notice and this permission notice appear in all copies.
9 *
10 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
11 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
12 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
13 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
14 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
15 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
16 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
17 */
18
19#include <linux/nl80211.h>
20#include <linux/platform_device.h>
21#include <linux/ath9k_platform.h>
22#include <linux/module.h>
23#include "ath9k.h"
24
25static const struct platform_device_id ath9k_platform_id_table[] = {
26	{
27		.name = "ath9k",
28		.driver_data = AR5416_AR9100_DEVID,
29	},
30	{
31		.name = "ar933x_wmac",
32		.driver_data = AR9300_DEVID_AR9330,
33	},
34	{
35		.name = "ar934x_wmac",
36		.driver_data = AR9300_DEVID_AR9340,
37	},
38	{
39		.name = "qca955x_wmac",
40		.driver_data = AR9300_DEVID_QCA955X,
41	},
42	{
43		.name = "qca953x_wmac",
44		.driver_data = AR9300_DEVID_AR953X,
45	},
46	{
47		.name = "qca956x_wmac",
48		.driver_data = AR9300_DEVID_QCA956X,
49	},
50	{},
51};
52
53/* return bus cachesize in 4B word units */
54static void ath_ahb_read_cachesize(struct ath_common *common, int *csz)
55{
56	*csz = L1_CACHE_BYTES >> 2;
57}
58
59static bool ath_ahb_eeprom_read(struct ath_common *common, u32 off, u16 *data)
60{
61	struct ath_softc *sc = (struct ath_softc *)common->priv;
62	struct platform_device *pdev = to_platform_device(sc->dev);
63	struct ath9k_platform_data *pdata;
64
65	pdata = dev_get_platdata(&pdev->dev);
66	if (off >= (ARRAY_SIZE(pdata->eeprom_data))) {
67		ath_err(common,
68			"%s: flash read failed, offset %08x is out of range\n",
69			__func__, off);
70		return false;
71	}
72
73	*data = pdata->eeprom_data[off];
74	return true;
75}
76
77static struct ath_bus_ops ath_ahb_bus_ops  = {
78	.ath_bus_type = ATH_AHB,
79	.read_cachesize = ath_ahb_read_cachesize,
80	.eeprom_read = ath_ahb_eeprom_read,
81};
82
83static int ath_ahb_probe(struct platform_device *pdev)
84{
85	void __iomem *mem;
86	struct ath_softc *sc;
87	struct ieee80211_hw *hw;
88	struct resource *res;
89	const struct platform_device_id *id = platform_get_device_id(pdev);
90	int irq;
91	int ret = 0;
92	struct ath_hw *ah;
93	char hw_name[64];
94
95	if (!dev_get_platdata(&pdev->dev)) {
96		dev_err(&pdev->dev, "no platform data specified\n");
97		return -EINVAL;
98	}
99
100	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
101	if (res == NULL) {
102		dev_err(&pdev->dev, "no memory resource found\n");
103		return -ENXIO;
104	}
105
106	mem = devm_ioremap_nocache(&pdev->dev, res->start, resource_size(res));
107	if (mem == NULL) {
108		dev_err(&pdev->dev, "ioremap failed\n");
109		return -ENOMEM;
110	}
111
112	res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
113	if (res == NULL) {
114		dev_err(&pdev->dev, "no IRQ resource found\n");
115		return -ENXIO;
116	}
117
118	irq = res->start;
119
120	ath9k_fill_chanctx_ops();
121	hw = ieee80211_alloc_hw(sizeof(struct ath_softc), &ath9k_ops);
122	if (hw == NULL) {
123		dev_err(&pdev->dev, "no memory for ieee80211_hw\n");
124		return -ENOMEM;
125	}
126
127	SET_IEEE80211_DEV(hw, &pdev->dev);
128	platform_set_drvdata(pdev, hw);
129
130	sc = hw->priv;
131	sc->hw = hw;
132	sc->dev = &pdev->dev;
133	sc->mem = mem;
134	sc->irq = irq;
135
136	ret = request_irq(irq, ath_isr, IRQF_SHARED, "ath9k", sc);
137	if (ret) {
138		dev_err(&pdev->dev, "request_irq failed\n");
139		goto err_free_hw;
140	}
141
142	ret = ath9k_init_device(id->driver_data, sc, &ath_ahb_bus_ops);
143	if (ret) {
144		dev_err(&pdev->dev, "failed to initialize device\n");
145		goto err_irq;
146	}
147
148	ah = sc->sc_ah;
149	ath9k_hw_name(ah, hw_name, sizeof(hw_name));
150	wiphy_info(hw->wiphy, "%s mem=0x%lx, irq=%d\n",
151		   hw_name, (unsigned long)mem, irq);
152
153	return 0;
154
155 err_irq:
156	free_irq(irq, sc);
157 err_free_hw:
158	ieee80211_free_hw(hw);
159	return ret;
160}
161
162static int ath_ahb_remove(struct platform_device *pdev)
163{
164	struct ieee80211_hw *hw = platform_get_drvdata(pdev);
165
166	if (hw) {
167		struct ath_softc *sc = hw->priv;
168
169		ath9k_deinit_device(sc);
170		free_irq(sc->irq, sc);
171		ieee80211_free_hw(sc->hw);
172	}
173
174	return 0;
175}
176
177static struct platform_driver ath_ahb_driver = {
178	.probe      = ath_ahb_probe,
179	.remove     = ath_ahb_remove,
180	.driver		= {
181		.name	= "ath9k",
182	},
183	.id_table    = ath9k_platform_id_table,
184};
185
186MODULE_DEVICE_TABLE(platform, ath9k_platform_id_table);
187
188int ath_ahb_init(void)
189{
190	return platform_driver_register(&ath_ahb_driver);
191}
192
193void ath_ahb_exit(void)
194{
195	platform_driver_unregister(&ath_ahb_driver);
196}
197