| /* |
| * 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); |