ahb.c

  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/mod_devicetable.h>
 20#include <linux/module.h>
 21#include <linux/nl80211.h>
 22#include <linux/of.h>
 23#include <linux/platform_device.h>
 24
 25#include "ath9k.h"
 26
 27static const struct of_device_id ath9k_of_match_table[] = {
 28	{ .compatible = "qca,ar9130-wifi", .data = (void *)AR5416_AR9100_DEVID },
 29	{ .compatible = "qca,ar9330-wifi", .data = (void *)AR9300_DEVID_AR9330 },
 30	{ .compatible = "qca,ar9340-wifi", .data = (void *)AR9300_DEVID_AR9340 },
 31	{ .compatible = "qca,qca9530-wifi", .data = (void *)AR9300_DEVID_AR953X },
 32	{ .compatible = "qca,qca9550-wifi", .data = (void *)AR9300_DEVID_QCA955X },
 33	{ .compatible = "qca,qca9560-wifi", .data = (void *)AR9300_DEVID_QCA956X },
 34	{},
 35};
 36
 37/* return bus cachesize in 4B word units */
 38static void ath_ahb_read_cachesize(struct ath_common *common, int *csz)
 39{
 40	*csz = L1_CACHE_BYTES >> 2;
 41}
 42
 43static bool ath_ahb_eeprom_read(struct ath_common *common, u32 off, u16 *data)
 44{
 45	ath_err(common, "%s: eeprom data has to be provided externally\n",
 46		__func__);
 47	return false;
 48}
 49
 50static const struct ath_bus_ops ath_ahb_bus_ops  = {
 51	.ath_bus_type = ATH_AHB,
 52	.read_cachesize = ath_ahb_read_cachesize,
 53	.eeprom_read = ath_ahb_eeprom_read,
 54};
 55
 56static int ath_ahb_probe(struct platform_device *pdev)
 57{
 58	struct ieee80211_hw *hw;
 59	struct ath_softc *sc;
 60	struct ath_hw *ah;
 61	void __iomem *mem;
 62	char hw_name[64];
 63	u16 dev_id;
 64	int irq;
 65	int ret;
 66
 67	mem = devm_platform_ioremap_resource(pdev, 0);
 68	if (IS_ERR(mem)) {
 69		dev_err(&pdev->dev, "ioremap failed\n");
 70		return PTR_ERR(mem);
 71	}
 72
 73	irq = platform_get_irq(pdev, 0);
 74	if (irq < 0)
 75		return irq;
 76
 77	ath9k_fill_chanctx_ops();
 78	hw = ieee80211_alloc_hw(sizeof(struct ath_softc), &ath9k_ops);
 79	if (hw == NULL) {
 80		dev_err(&pdev->dev, "no memory for ieee80211_hw\n");
 81		return -ENOMEM;
 82	}
 83
 84	SET_IEEE80211_DEV(hw, &pdev->dev);
 85	platform_set_drvdata(pdev, hw);
 86
 87	sc = hw->priv;
 88	sc->hw = hw;
 89	sc->dev = &pdev->dev;
 90	sc->mem = mem;
 91	sc->irq = irq;
 92
 93	ret = request_irq(irq, ath_isr, IRQF_SHARED, "ath9k", sc);
 94	if (ret) {
 95		dev_err(&pdev->dev, "request_irq failed\n");
 96		goto err_free_hw;
 97	}
 98
 99	dev_id = (u16)(kernel_ulong_t)of_device_get_match_data(&pdev->dev);
100	ret = ath9k_init_device(dev_id, sc, &ath_ahb_bus_ops);
101	if (ret) {
102		dev_err(&pdev->dev, "failed to initialize device\n");
103		goto err_irq;
104	}
105
106	ah = sc->sc_ah;
107	ath9k_hw_name(ah, hw_name, sizeof(hw_name));
108	wiphy_info(hw->wiphy, "%s mem=0x%p, irq=%d\n",
109		   hw_name, mem, irq);
110
111	return 0;
112
113 err_irq:
114	free_irq(irq, sc);
115 err_free_hw:
116	ieee80211_free_hw(hw);
117	return ret;
118}
119
120static void ath_ahb_remove(struct platform_device *pdev)
121{
122	struct ieee80211_hw *hw = platform_get_drvdata(pdev);
123
124	if (hw) {
125		struct ath_softc *sc = hw->priv;
126
127		ath9k_deinit_device(sc);
128		free_irq(sc->irq, sc);
129		ieee80211_free_hw(sc->hw);
130	}
131}
132
133static struct platform_driver ath_ahb_driver = {
134	.probe = ath_ahb_probe,
135	.remove = ath_ahb_remove,
136	.driver = {
137		.name = "ath9k",
138		.of_match_table = ath9k_of_match_table,
139	},
140};
141
142MODULE_DEVICE_TABLE(of, ath9k_of_match_table);
143
144int ath_ahb_init(void)
145{
146	return platform_driver_register(&ath_ahb_driver);
147}
148
149void ath_ahb_exit(void)
150{
151	platform_driver_unregister(&ath_ahb_driver);
152}