| /* |
| * 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 <ath25_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 = dev_get_platdata(&pdev->dev); |
| u16 *eeprom, *eeprom_end; |
| |
| 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 = dev_get_platdata(&pdev->dev); |
| 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 = dev_get_platdata(&pdev->dev); |
| 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 = dev_get_platdata(&pdev->dev); |
| struct ath5k_hw *ah; |
| struct ieee80211_hw *hw; |
| struct resource *res; |
| void __iomem *mem; |
| int irq; |
| int ret = 0; |
| u32 reg; |
| |
| if (!dev_get_platdata(&pdev->dev)) { |
| 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); |
| err_iounmap: |
| iounmap(mem); |
| err_out: |
| return ret; |
| } |
| |
| static int ath_ahb_remove(struct platform_device *pdev) |
| { |
| struct ar231x_board_config *bcfg = dev_get_platdata(&pdev->dev); |
| 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); |
| 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", |
| }, |
| }; |
| |
| module_platform_driver(ath_ahb_driver); |