diff options
Diffstat (limited to 'drivers/net/wireless/ath/ath5k/ahb.c')
| -rw-r--r-- | drivers/net/wireless/ath/ath5k/ahb.c | 219 |
1 files changed, 219 insertions, 0 deletions
diff --git a/drivers/net/wireless/ath/ath5k/ahb.c b/drivers/net/wireless/ath/ath5k/ahb.c new file mode 100644 index 000000000000..707cde149248 --- /dev/null +++ b/drivers/net/wireless/ath/ath5k/ahb.c @@ -0,0 +1,219 @@ +/* + * 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); |