--- /dev/null
+/*
+ * Copyright (c) 2008-2009 Atheros Communications Inc.
+ * Copyright (c) 2009 Gabor Juhos <juhosg@openwrt.org>
+ * Copyright (c) 2009 Imre Kaloz <kaloz@openwrt.org>
+ *
+ * Permission to use, copy, modify, and/or distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+
+#include <linux/nl80211.h>
+#include <linux/platform_device.h>
+#include <ar231x_platform.h>
+#include "ath5k.h"
+#include "debug.h"
+#include "base.h"
+#include "reg.h"
+#include "debug.h"
+
+/* return bus cachesize in 4B word units */
+static void ath5k_ahb_read_cachesize(struct ath_common *common, int *csz)
+{
+ *csz = L1_CACHE_BYTES >> 2;
+}
+
+bool ath5k_ahb_eeprom_read(struct ath_common *common, u32 off, u16 *data)
+{
+ struct ath5k_softc *sc = common->priv;
+ struct platform_device *pdev = to_platform_device(sc->dev);
+ struct ar231x_board_config *bcfg = pdev->dev.platform_data;
+ u16 *eeprom, *eeprom_end;
+
+
+
+ bcfg = pdev->dev.platform_data;
+ eeprom = (u16 *) bcfg->radio;
+ eeprom_end = ((void *) bcfg->config) + BOARD_CONFIG_BUFSZ;
+
+ eeprom += off;
+ if (eeprom > eeprom_end)
+ return -EINVAL;
+
+ *data = *eeprom;
+ return 0;
+}
+
+int ath5k_hw_read_srev(struct ath5k_hw *ah)
+{
+ struct ath5k_softc *sc = ah->ah_sc;
+ struct platform_device *pdev = to_platform_device(sc->dev);
+ struct ar231x_board_config *bcfg = pdev->dev.platform_data;
+ ah->ah_mac_srev = bcfg->devid;
+ return 0;
+}
+
+static const struct ath_bus_ops ath_ahb_bus_ops = {
+ .ath_bus_type = ATH_AHB,
+ .read_cachesize = ath5k_ahb_read_cachesize,
+ .eeprom_read = ath5k_ahb_eeprom_read,
+};
+
+/*Initialization*/
+static int ath_ahb_probe(struct platform_device *pdev)
+{
+ struct ar231x_board_config *bcfg = pdev->dev.platform_data;
+ struct ath5k_softc *sc;
+ struct ieee80211_hw *hw;
+ struct resource *res;
+ void __iomem *mem;
+ int irq;
+ int ret = 0;
+ u32 reg;
+
+ if (!pdev->dev.platform_data) {
+ dev_err(&pdev->dev, "no platform data specified\n");
+ ret = -EINVAL;
+ goto err_out;
+ }
+
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ if (res == NULL) {
+ dev_err(&pdev->dev, "no memory resource found\n");
+ ret = -ENXIO;
+ goto err_out;
+ }
+
+ mem = ioremap_nocache(res->start, res->end - res->start + 1);
+ if (mem == NULL) {
+ dev_err(&pdev->dev, "ioremap failed\n");
+ ret = -ENOMEM;
+ goto err_out;
+ }
+
+ res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
+ if (res == NULL) {
+ dev_err(&pdev->dev, "no IRQ resource found\n");
+ ret = -ENXIO;
+ goto err_out;
+ }
+
+ irq = res->start;
+
+ hw = ieee80211_alloc_hw(sizeof(struct ath5k_softc), &ath5k_hw_ops);
+ if (hw == NULL) {
+ dev_err(&pdev->dev, "no memory for ieee80211_hw\n");
+ ret = -ENOMEM;
+ goto err_out;
+ }
+
+ sc = hw->priv;
+ sc->hw = hw;
+ sc->dev = &pdev->dev;
+ sc->iobase = mem;
+ sc->irq = irq;
+ sc->devid = bcfg->devid;
+
+ if (bcfg->devid >= AR5K_SREV_AR2315_R6) {
+ /* Enable WMAC AHB arbitration */
+ reg = __raw_readl((void __iomem *) AR5K_AR2315_AHB_ARB_CTL);
+ reg |= AR5K_AR2315_AHB_ARB_CTL_WLAN;
+ __raw_writel(reg, (void __iomem *) AR5K_AR2315_AHB_ARB_CTL);
+
+ /* Enable global WMAC swapping */
+ reg = __raw_readl((void __iomem *) AR5K_AR2315_BYTESWAP);
+ reg |= AR5K_AR2315_BYTESWAP_WMAC;
+ __raw_writel(reg, (void __iomem *) AR5K_AR2315_BYTESWAP);
+ } else {
+ /* Enable WMAC DMA access (assuming 5312 or 231x*/
+ /* TODO: check other platforms */
+ reg = __raw_readl((void __iomem *) AR5K_AR5312_ENABLE);
+ if (to_platform_device(sc->dev)->id == 0)
+ reg |= AR5K_AR5312_ENABLE_WLAN0;
+ else
+ reg |= AR5K_AR5312_ENABLE_WLAN1;
+ __raw_writel(reg, (void __iomem *) AR5K_AR5312_ENABLE);
+ }
+
+ ret = ath5k_init_softc(sc, &ath_ahb_bus_ops);
+ if (ret != 0) {
+ dev_err(&pdev->dev, "failed to attach device, err=%d\n", ret);
+ ret = -ENODEV;
+ goto err_free_hw;
+ }
+
+ platform_set_drvdata(pdev, hw);
+
+ return 0;
+
+ err_free_hw:
+ ieee80211_free_hw(hw);
+ platform_set_drvdata(pdev, NULL);
+ err_out:
+ return ret;
+}
+
+static int ath_ahb_remove(struct platform_device *pdev)
+{
+ struct ar231x_board_config *bcfg = pdev->dev.platform_data;
+ struct ieee80211_hw *hw = platform_get_drvdata(pdev);
+ struct ath5k_softc *sc;
+ u32 reg;
+
+ if (!hw)
+ return 0;
+
+ sc = hw->priv;
+
+ if (bcfg->devid >= AR5K_SREV_AR2315_R6) {
+ /* Disable WMAC AHB arbitration */
+ reg = __raw_readl((void __iomem *) AR5K_AR2315_AHB_ARB_CTL);
+ reg &= ~AR5K_AR2315_AHB_ARB_CTL_WLAN;
+ __raw_writel(reg, (void __iomem *) AR5K_AR2315_AHB_ARB_CTL);
+ } else {
+ /*Stop DMA access */
+ reg = __raw_readl((void __iomem *) AR5K_AR5312_ENABLE);
+ if (to_platform_device(sc->dev)->id == 0)
+ reg &= ~AR5K_AR5312_ENABLE_WLAN0;
+ else
+ reg &= ~AR5K_AR5312_ENABLE_WLAN1;
+ __raw_writel(reg, (void __iomem *) AR5K_AR5312_ENABLE);
+ }
+
+ ath5k_deinit_softc(sc);
+ platform_set_drvdata(pdev, NULL);
+
+ return 0;
+}
+
+static struct platform_driver ath_ahb_driver = {
+ .probe = ath_ahb_probe,
+ .remove = ath_ahb_remove,
+ .driver = {
+ .name = "ar231x-wmac",
+ .owner = THIS_MODULE,
+ },
+};
+
+static int __init
+ath5k_ahb_init(void)
+{
+ return platform_driver_register(&ath_ahb_driver);
+}
+
+static void __exit
+ath5k_ahb_exit(void)
+{
+ platform_driver_unregister(&ath_ahb_driver);
+}
+
+module_init(ath5k_ahb_init);
+module_exit(ath5k_ahb_exit);
projects / mv-sheeva.git / blobdiff