/* * 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 <linux/etherdevice.h> #include <linux/export.h> #include <ar231x_platform.h> #include "ath5k.h" #include "debug.h" #include "base.h" #include "reg.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; } static bool ath5k_ahb_eeprom_read(struct ath_common *common, u32 off, u16 *data) { struct ath5k_hw *ah = common->priv; struct platform_device *pdev = to_platform_device(ah->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 false; *data = *eeprom; return true; } int ath5k_hw_read_srev(struct ath5k_hw *ah) { struct platform_device *pdev = to_platform_device(ah->dev); struct ar231x_board_config *bcfg = pdev->dev.platform_data; ah->ah_mac_srev = bcfg->devid; return 0; } static int ath5k_ahb_eeprom_read_mac(struct ath5k_hw *ah, u8 *mac) { struct platform_device *pdev = to_platform_device(ah->dev); struct ar231x_board_config *bcfg = pdev->dev.platform_data; u8 *cfg_mac; if (to_platform_device(ah->dev)->id == 0) cfg_mac = bcfg->config->wlan0_mac; else cfg_mac = bcfg->config->wlan1_mac; memcpy(mac, cfg_mac, ETH_ALEN); 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, .eeprom_read_mac = ath5k_ahb_eeprom_read_mac, }; /*Initialization*/ static int ath_ahb_probe(struct platform_device *pdev) { struct ar231x_board_config *bcfg = pdev->dev.platform_data; struct ath5k_hw *ah; 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, resource_size(res)); 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_iounmap; } irq = res->start; hw = ieee80211_alloc_hw(sizeof(struct ath5k_hw), &ath5k_hw_ops); if (hw == NULL) { dev_err(&pdev->dev, "no memory for ieee80211_hw\n"); ret = -ENOMEM; goto err_iounmap; } ah = hw->priv; ah->hw = hw; ah->dev = &pdev->dev; ah->iobase = mem; ah->irq = irq; ah->devid = bcfg->devid; if (bcfg->devid >= AR5K_SREV_AR2315_R6) { /* Enable WMAC AHB arbitration */ reg = ioread32((void __iomem *) AR5K_AR2315_AHB_ARB_CTL); reg |= AR5K_AR2315_AHB_ARB_CTL_WLAN; iowrite32(reg, (void __iomem *) AR5K_AR2315_AHB_ARB_CTL); /* Enable global WMAC swapping */ reg = ioread32((void __iomem *) AR5K_AR2315_BYTESWAP); reg |= AR5K_AR2315_BYTESWAP_WMAC; iowrite32(reg, (void __iomem *) AR5K_AR2315_BYTESWAP); } else { /* Enable WMAC DMA access (assuming 5312 or 231x*/ /* TODO: check other platforms */ reg = ioread32((void __iomem *) AR5K_AR5312_ENABLE); if (to_platform_device(ah->dev)->id == 0) reg |= AR5K_AR5312_ENABLE_WLAN0; else reg |= AR5K_AR5312_ENABLE_WLAN1; iowrite32(reg, (void __iomem *) AR5K_AR5312_ENABLE); /* * On a dual-band AR5312, the multiband radio is only * used as pass-through. Disable 2 GHz support in the * driver for it */ if (to_platform_device(ah->dev)->id == 0 && (bcfg->config->flags & (BD_WLAN0 | BD_WLAN1)) == (BD_WLAN1 | BD_WLAN0)) ah->ah_capabilities.cap_needs_2GHz_ovr = true; else ah->ah_capabilities.cap_needs_2GHz_ovr = false; } ret = ath5k_init_ah(ah, &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_iounmap: iounmap(mem); 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_hw *ah; u32 reg; if (!hw) return 0; ah = hw->priv; if (bcfg->devid >= AR5K_SREV_AR2315_R6) { /* Disable WMAC AHB arbitration */ reg = ioread32((void __iomem *) AR5K_AR2315_AHB_ARB_CTL); reg &= ~AR5K_AR2315_AHB_ARB_CTL_WLAN; iowrite32(reg, (void __iomem *) AR5K_AR2315_AHB_ARB_CTL); } else { /*Stop DMA access */ reg = ioread32((void __iomem *) AR5K_AR5312_ENABLE); if (to_platform_device(ah->dev)->id == 0) reg &= ~AR5K_AR5312_ENABLE_WLAN0; else reg &= ~AR5K_AR5312_ENABLE_WLAN1; iowrite32(reg, (void __iomem *) AR5K_AR5312_ENABLE); } ath5k_deinit_ah(ah); iounmap(ah->iobase); platform_set_drvdata(pdev, NULL); ieee80211_free_hw(hw); return 0; } static struct platform_driver ath_ahb_driver = { .probe = ath_ahb_probe, .remove = ath_ahb_remove, .driver = { .name = "ar231x-wmac", .owner = THIS_MODULE, }, }; module_platform_driver(ath_ahb_driver);