cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
Log | Files | Refs | README | LICENSE | sfeed.txt

ahb.c (4345B)

      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	irq = platform_get_irq(pdev, 0);
    102	if (irq < 0)
    103		return irq;
    104
    105	ath9k_fill_chanctx_ops();
    106	hw = ieee80211_alloc_hw(sizeof(struct ath_softc), &ath9k_ops);
    107	if (hw == NULL) {
    108		dev_err(&pdev->dev, "no memory for ieee80211_hw\n");
    109		return -ENOMEM;
    110	}
    111
    112	SET_IEEE80211_DEV(hw, &pdev->dev);
    113	platform_set_drvdata(pdev, hw);
    114
    115	sc = hw->priv;
    116	sc->hw = hw;
    117	sc->dev = &pdev->dev;
    118	sc->mem = mem;
    119	sc->irq = irq;
    120
    121	ret = request_irq(irq, ath_isr, IRQF_SHARED, "ath9k", sc);
    122	if (ret) {
    123		dev_err(&pdev->dev, "request_irq failed\n");
    124		goto err_free_hw;
    125	}
    126
    127	ret = ath9k_init_device(id->driver_data, sc, &ath_ahb_bus_ops);
    128	if (ret) {
    129		dev_err(&pdev->dev, "failed to initialize device\n");
    130		goto err_irq;
    131	}
    132
    133	ah = sc->sc_ah;
    134	ath9k_hw_name(ah, hw_name, sizeof(hw_name));
    135	wiphy_info(hw->wiphy, "%s mem=0x%lx, irq=%d\n",
    136		   hw_name, (unsigned long)mem, irq);
    137
    138	return 0;
    139
    140 err_irq:
    141	free_irq(irq, sc);
    142 err_free_hw:
    143	ieee80211_free_hw(hw);
    144	return ret;
    145}
    146
    147static int ath_ahb_remove(struct platform_device *pdev)
    148{
    149	struct ieee80211_hw *hw = platform_get_drvdata(pdev);
    150
    151	if (hw) {
    152		struct ath_softc *sc = hw->priv;
    153
    154		ath9k_deinit_device(sc);
    155		free_irq(sc->irq, sc);
    156		ieee80211_free_hw(sc->hw);
    157	}
    158
    159	return 0;
    160}
    161
    162static struct platform_driver ath_ahb_driver = {
    163	.probe      = ath_ahb_probe,
    164	.remove     = ath_ahb_remove,
    165	.driver		= {
    166		.name	= "ath9k",
    167	},
    168	.id_table    = ath9k_platform_id_table,
    169};
    170
    171MODULE_DEVICE_TABLE(platform, ath9k_platform_id_table);
    172
    173int ath_ahb_init(void)
    174{
    175	return platform_driver_register(&ath_ahb_driver);
    176}
    177
    178void ath_ahb_exit(void)
    179{
    180	platform_driver_unregister(&ath_ahb_driver);
    181}