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/module.h>
22#include <linux/mod_devicetable.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	ath_err(common, "%s: eeprom data has to be provided externally\n",
62		__func__);
63	return false;
64}
65
66static const struct ath_bus_ops ath_ahb_bus_ops  = {
67	.ath_bus_type = ATH_AHB,
68	.read_cachesize = ath_ahb_read_cachesize,
69	.eeprom_read = ath_ahb_eeprom_read,
70};
71
72static int ath_ahb_probe(struct platform_device *pdev)
73{
74	void __iomem *mem;
75	struct ath_softc *sc;
76	struct ieee80211_hw *hw;
77	struct resource *res;
78	const struct platform_device_id *id = platform_get_device_id(pdev);
79	int irq;
80	int ret = 0;
81	struct ath_hw *ah;
82	char hw_name[64];
83
84	if (!dev_get_platdata(&pdev->dev)) {
85		dev_err(&pdev->dev, "no platform data specified\n");
86		return -EINVAL;
87	}
88
89	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
90	if (res == NULL) {
91		dev_err(&pdev->dev, "no memory resource found\n");
92		return -ENXIO;
93	}
94
95	mem = devm_ioremap(&pdev->dev, res->start, resource_size(res));
96	if (mem == NULL) {
97		dev_err(&pdev->dev, "ioremap failed\n");
98		return -ENOMEM;
99	}
100
101	res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
102	if (res == NULL) {
103		dev_err(&pdev->dev, "no IRQ resource found\n");
104		return -ENXIO;
105	}
106
107	irq = res->start;
108
109	ath9k_fill_chanctx_ops();
110	hw = ieee80211_alloc_hw(sizeof(struct ath_softc), &ath9k_ops);
111	if (hw == NULL) {
112		dev_err(&pdev->dev, "no memory for ieee80211_hw\n");
113		return -ENOMEM;
114	}
115
116	SET_IEEE80211_DEV(hw, &pdev->dev);
117	platform_set_drvdata(pdev, hw);
118
119	sc = hw->priv;
120	sc->hw = hw;
121	sc->dev = &pdev->dev;
122	sc->mem = mem;
123	sc->irq = irq;
124
125	ret = request_irq(irq, ath_isr, IRQF_SHARED, "ath9k", sc);
126	if (ret) {
127		dev_err(&pdev->dev, "request_irq failed\n");
128		goto err_free_hw;
129	}
130
131	ret = ath9k_init_device(id->driver_data, sc, &ath_ahb_bus_ops);
132	if (ret) {
133		dev_err(&pdev->dev, "failed to initialize device\n");
134		goto err_irq;
135	}
136
137	ah = sc->sc_ah;
138	ath9k_hw_name(ah, hw_name, sizeof(hw_name));
139	wiphy_info(hw->wiphy, "%s mem=0x%p, irq=%d\n",
140		   hw_name, mem, irq);
141
142	return 0;
143
144 err_irq:
145	free_irq(irq, sc);
146 err_free_hw:
147	ieee80211_free_hw(hw);
148	return ret;
149}
150
151static int ath_ahb_remove(struct platform_device *pdev)
152{
153	struct ieee80211_hw *hw = platform_get_drvdata(pdev);
154
155	if (hw) {
156		struct ath_softc *sc = hw->priv;
157
158		ath9k_deinit_device(sc);
159		free_irq(sc->irq, sc);
160		ieee80211_free_hw(sc->hw);
161	}
162
163	return 0;
164}
165
166static struct platform_driver ath_ahb_driver = {
167	.probe      = ath_ahb_probe,
168	.remove     = ath_ahb_remove,
169	.driver		= {
170		.name	= "ath9k",
171	},
172	.id_table    = ath9k_platform_id_table,
173};
174
175MODULE_DEVICE_TABLE(platform, ath9k_platform_id_table);
176
177int ath_ahb_init(void)
178{
179	return platform_driver_register(&ath_ahb_driver);
180}
181
182void ath_ahb_exit(void)
183{
184	platform_driver_unregister(&ath_ahb_driver);
185}
186