Subject: [PATCH] [RESEND] ath5k: Remove AHB bus support

From: Paul Bolle <[email-masked]>
Date: Wed, 10 Sep 2014 10:53:41 +0200

AHB bus support was added in v2.6.38, through commit a0b907ee2a71
("ath5k: Add AHB bus support."). That code can only be build if the
Kconfig symbol ATHEROS_AR231X is set. But that symbol has never been
added to the tree. So AHB bus support has always been dead code.

Let's remove all code that depends on ATHEROS_AR231X. If that symbol
ever gets added to the tree the AHB bus support can be re-added too.

Signed-off-by: Paul Bolle <[email-masked]>
---
First sent in https://lkml.org/lkml/2013/5/13/303 . Updated on top of
next-20140909.

Build tested only (no access to this hardware).

 drivers/net/wireless/ath/ath5k/Kconfig  |  14 +-
 drivers/net/wireless/ath/ath5k/Makefile |   1 -
 drivers/net/wireless/ath/ath5k/ahb.c    | 234 --------------------------------
 drivers/net/wireless/ath/ath5k/ath5k.h  |  28 ----
 drivers/net/wireless/ath/ath5k/base.c   |  14 --
 drivers/net/wireless/ath/ath5k/led.c    |   6 -
 6 files changed, 3 insertions(+), 294 deletions(-)
 delete mode 100644 drivers/net/wireless/ath/ath5k/ahb.c

diff --git a/drivers/net/wireless/ath/ath5k/Kconfig b/drivers/net/wireless/ath/ath5k/Kconfig
index c9f81a388f15..93caf8e68901 100644
--- a/drivers/net/wireless/ath/ath5k/Kconfig
+++ b/drivers/net/wireless/ath/ath5k/Kconfig
@@ -1,13 +1,12 @@
 config ATH5K
 	tristate "Atheros 5xxx wireless cards support"
-	depends on (PCI || ATHEROS_AR231X) && MAC80211
+	depends on PCI && MAC80211
 	select ATH_COMMON
 	select MAC80211_LEDS
 	select LEDS_CLASS
 	select NEW_LEDS
 	select AVERAGE
-	select ATH5K_AHB if (ATHEROS_AR231X && !PCI)
-	select ATH5K_PCI if (!ATHEROS_AR231X && PCI)
+	select ATH5K_PCI
 	---help---
 	  This module adds support for wireless adapters based on
 	  Atheros 5xxx chipset.
@@ -52,16 +51,9 @@ config ATH5K_TRACER
 
 	  If unsure, say N.
 
-config ATH5K_AHB
-	bool "Atheros 5xxx AHB bus support"
-	depends on (ATHEROS_AR231X && !PCI)
-	---help---
-	  This adds support for WiSoC type chipsets of the 5xxx Atheros
-	  family.
-
 config ATH5K_PCI
 	bool "Atheros 5xxx PCI bus support"
-	depends on (!ATHEROS_AR231X && PCI)
+	depends on PCI
 	---help---
 	  This adds support for PCI type chipsets of the 5xxx Atheros
 	  family.
diff --git a/drivers/net/wireless/ath/ath5k/Makefile b/drivers/net/wireless/ath/ath5k/Makefile
index 1b3a34f7f224..51e2d8668041 100644
--- a/drivers/net/wireless/ath/ath5k/Makefile
+++ b/drivers/net/wireless/ath/ath5k/Makefile
@@ -17,6 +17,5 @@ ath5k-y				+= ani.o
 ath5k-y				+= sysfs.o
 ath5k-y				+= mac80211-ops.o
 ath5k-$(CONFIG_ATH5K_DEBUG)	+= debug.o
-ath5k-$(CONFIG_ATH5K_AHB)	+= ahb.o
 ath5k-$(CONFIG_ATH5K_PCI)	+= pci.o
 obj-$(CONFIG_ATH5K)		+= ath5k.o
diff --git a/drivers/net/wireless/ath/ath5k/ahb.c b/drivers/net/wireless/ath/ath5k/ahb.c
deleted file mode 100644
index 79bffe165cab..000000000000
--- a/drivers/net/wireless/ath/ath5k/ahb.c
+++ /dev/null
@@ -1,234 +0,0 @@
-/*
- * Copyright (c) 2008-2009 Atheros Communications Inc.
- * Copyright (c) 2009 Gabor Juhos <[email-masked]>
- * Copyright (c) 2009 Imre Kaloz <[email-masked]>
- *
- * 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 = 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",
-		.owner	= THIS_MODULE,
-	},
-};
-
-module_platform_driver(ath_ahb_driver);
diff --git a/drivers/net/wireless/ath/ath5k/ath5k.h b/drivers/net/wireless/ath/ath5k/ath5k.h
index 85316bb3f8c6..ed2468220216 100644
--- a/drivers/net/wireless/ath/ath5k/ath5k.h
+++ b/drivers/net/wireless/ath/ath5k/ath5k.h
@@ -1647,32 +1647,6 @@ static inline struct ath_regulatory *ath5k_hw_regulatory(struct ath5k_hw *ah)
 	return &(ath5k_hw_common(ah)->regulatory);
 }
 
-#ifdef CONFIG_ATHEROS_AR231X
-#define AR5K_AR2315_PCI_BASE	((void __iomem *)0xb0100000)
-
-static inline void __iomem *ath5k_ahb_reg(struct ath5k_hw *ah, u16 reg)
-{
-	/* On AR2315 and AR2317 the PCI clock domain registers
-	 * are outside of the WMAC register space */
-	if (unlikely((reg >= 0x4000) && (reg < 0x5000) &&
-	    (ah->ah_mac_srev >= AR5K_SREV_AR2315_R6)))
-		return AR5K_AR2315_PCI_BASE + reg;
-
-	return ah->iobase + reg;
-}
-
-static inline u32 ath5k_hw_reg_read(struct ath5k_hw *ah, u16 reg)
-{
-	return ioread32(ath5k_ahb_reg(ah, reg));
-}
-
-static inline void ath5k_hw_reg_write(struct ath5k_hw *ah, u32 val, u16 reg)
-{
-	iowrite32(val, ath5k_ahb_reg(ah, reg));
-}
-
-#else
-
 static inline u32 ath5k_hw_reg_read(struct ath5k_hw *ah, u16 reg)
 {
 	return ioread32(ah->iobase + reg);
@@ -1683,8 +1657,6 @@ static inline void ath5k_hw_reg_write(struct ath5k_hw *ah, u32 val, u16 reg)
 	iowrite32(val, ah->iobase + reg);
 }
 
-#endif
-
 static inline enum ath_bus_type ath5k_get_bus_type(struct ath5k_hw *ah)
 {
 	return ath5k_hw_common(ah)->bus_ops->ath_bus_type;
diff --git a/drivers/net/wireless/ath/ath5k/base.c b/drivers/net/wireless/ath/ath5k/base.c
index 59a87247aac4..a4a09bb8f2f3 100644
--- a/drivers/net/wireless/ath/ath5k/base.c
+++ b/drivers/net/wireless/ath/ath5k/base.c
@@ -99,15 +99,6 @@ static int ath5k_reset(struct ath5k_hw *ah, struct ieee80211_channel *chan,
 
 /* Known SREVs */
 static const struct ath5k_srev_name srev_names[] = {
-#ifdef CONFIG_ATHEROS_AR231X
-	{ "5312",	AR5K_VERSION_MAC,	AR5K_SREV_AR5312_R2 },
-	{ "5312",	AR5K_VERSION_MAC,	AR5K_SREV_AR5312_R7 },
-	{ "2313",	AR5K_VERSION_MAC,	AR5K_SREV_AR2313_R8 },
-	{ "2315",	AR5K_VERSION_MAC,	AR5K_SREV_AR2315_R6 },
-	{ "2315",	AR5K_VERSION_MAC,	AR5K_SREV_AR2315_R7 },
-	{ "2317",	AR5K_VERSION_MAC,	AR5K_SREV_AR2317_R1 },
-	{ "2317",	AR5K_VERSION_MAC,	AR5K_SREV_AR2317_R2 },
-#else
 	{ "5210",	AR5K_VERSION_MAC,	AR5K_SREV_AR5210 },
 	{ "5311",	AR5K_VERSION_MAC,	AR5K_SREV_AR5311 },
 	{ "5311A",	AR5K_VERSION_MAC,	AR5K_SREV_AR5311A },
@@ -126,7 +117,6 @@ static const struct ath5k_srev_name srev_names[] = {
 	{ "5418",	AR5K_VERSION_MAC,	AR5K_SREV_AR5418 },
 	{ "2425",	AR5K_VERSION_MAC,	AR5K_SREV_AR2425 },
 	{ "2417",	AR5K_VERSION_MAC,	AR5K_SREV_AR2417 },
-#endif
 	{ "xxxxx",	AR5K_VERSION_MAC,	AR5K_SREV_UNKNOWN },
 	{ "5110",	AR5K_VERSION_RAD,	AR5K_SREV_RAD_5110 },
 	{ "5111",	AR5K_VERSION_RAD,	AR5K_SREV_RAD_5111 },
@@ -142,10 +132,6 @@ static const struct ath5k_srev_name srev_names[] = {
 	{ "5413",	AR5K_VERSION_RAD,	AR5K_SREV_RAD_5413 },
 	{ "5424",	AR5K_VERSION_RAD,	AR5K_SREV_RAD_5424 },
 	{ "5133",	AR5K_VERSION_RAD,	AR5K_SREV_RAD_5133 },
-#ifdef CONFIG_ATHEROS_AR231X
-	{ "2316",	AR5K_VERSION_RAD,	AR5K_SREV_RAD_2316 },
-	{ "2317",	AR5K_VERSION_RAD,	AR5K_SREV_RAD_2317 },
-#endif
 	{ "xxxxx",	AR5K_VERSION_RAD,	AR5K_SREV_UNKNOWN },
 };
 
diff --git a/drivers/net/wireless/ath/ath5k/led.c b/drivers/net/wireless/ath/ath5k/led.c
index 2062d1190556..0beb7e7d6075 100644
--- a/drivers/net/wireless/ath/ath5k/led.c
+++ b/drivers/net/wireless/ath/ath5k/led.c
@@ -163,20 +163,14 @@ int ath5k_init_leds(struct ath5k_hw *ah)
 {
 	int ret = 0;
 	struct ieee80211_hw *hw = ah->hw;
-#ifndef CONFIG_ATHEROS_AR231X
 	struct pci_dev *pdev = ah->pdev;
-#endif
 	char name[ATH5K_LED_MAX_NAME_LEN + 1];
 	const struct pci_device_id *match;
 
 	if (!ah->pdev)
 		return 0;
 
-#ifdef CONFIG_ATHEROS_AR231X
-	match = NULL;
-#else
 	match = pci_match_id(&ath5k_led_devices[0], pdev);
-#endif
 	if (match) {
 		__set_bit(ATH_STAT_LEDSOFT, ah->status);
 		ah->led_pin = ATH_PIN(match->driver_data);
-- 
1.9.3