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Commit 0b523ced authored by Raja Mani's avatar Raja Mani Committed by Kalle Valo
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ath10k: add basic skeleton to support ahb 



qca4019 uses ahb instead of pci where it slightly differs in device
enumeration, clock control, reset control, etc. Good thing is that
ahb also uses copy engine for the data transaction. So, the most of
the stuff implemented in pci.c/ce.c are reusable in ahb case too.

Device enumeration in ahb case comes through platform driver/device
model. All resource details like irq, memory map, clocks, etc for
qca4019 can be fetched from of_node of platform device.

Simply flow would look like,

 device tree => platform device (kernel) => platform driver (ath10k)

Device tree entry will have all qca4019 resource details and the same
info will be passed to kernel. Kernel will prepare new platform device
for that entry and expose DT info to of_node in platform device.
Later, ath10k would register platform driver with unique compatible name
and then kernels binds to corresponding compatible entry & calls ath10k
ahb probe functions. From there onwards, ath10k will take control of it
and move forward.

New bool flag CONFIG_ATH10K_AHB is added in Kconfig to conditionally
enable ahb support in ath10k. On enabling this flag, ath10k_pci.ko
will have ahb support. This patch adds only basic skeleton and few
macros to support ahb in the context of qca4019.

Signed-off-by: default avatarRaja Mani <rmani@qti.qualcomm.com>
Signed-off-by: default avatarKalle Valo <kvalo@qca.qualcomm.com>
parent 90188f80

drivers/net/wireless/ath/ath10k/Kconfig

+6 −0
Original line number Diff line number Diff line
@@ -15,6 +15,12 @@ config ATH10K_PCI 
	---help---

	  This module adds support for PCIE bus



config ATH10K_AHB

	bool "Atheros ath10k AHB support"

	depends on ATH10K_PCI && OF

	---help---

	  This module adds support for AHB bus



config ATH10K_DEBUG

	bool "Atheros ath10k debugging"

	depends on ATH10K

drivers/net/wireless/ath/ath10k/Makefile

+2 −0
Original line number Diff line number Diff line
@@ -25,5 +25,7 @@ obj-$(CONFIG_ATH10K_PCI) += ath10k_pci.o 
ath10k_pci-y += pci.o \

		ce.o



ath10k_pci-$(CONFIG_ATH10K_AHB) += ahb.o



# for tracing framework to find trace.h

CFLAGS_trace.o := -I$(src)

drivers/net/wireless/ath/ath10k/ahb.c

0 → 100644
+67 −0
Original line number Diff line number Diff line 
/*

 * Copyright (c) 2016 Qualcomm Atheros, Inc. All rights reserved.

 * Copyright (c) 2015 The Linux Foundation. All rights reserved.

 *

 * 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/module.h>

#include "core.h"

#include "debug.h"

#include "ahb.h"



static const struct of_device_id ath10k_ahb_of_match[] = {

	/* TODO: enable this entry once everything in place.

	 * { .compatible = "qcom,ipq4019-wifi",

	 *   .data = (void *)ATH10K_HW_QCA4019 },

	 */

	{ }

};



MODULE_DEVICE_TABLE(of, ath10k_ahb_of_match);



static int ath10k_ahb_probe(struct platform_device *pdev)

{

	return 0;

}



static int ath10k_ahb_remove(struct platform_device *pdev)

{

	return 0;

}



static struct platform_driver ath10k_ahb_driver = {

	.driver         = {

		.name   = "ath10k_ahb",

		.of_match_table = ath10k_ahb_of_match,

	},

	.probe  = ath10k_ahb_probe,

	.remove = ath10k_ahb_remove,

};



int ath10k_ahb_init(void)

{

	int ret;



	printk(KERN_ERR "AHB support is still work in progress\n");



	ret = platform_driver_register(&ath10k_ahb_driver);

	if (ret)

		printk(KERN_ERR "failed to register ath10k ahb driver: %d\n",

		       ret);

	return ret;

}



void ath10k_ahb_exit(void)

{

	platform_driver_unregister(&ath10k_ahb_driver);

}

drivers/net/wireless/ath/ath10k/ahb.h

0 → 100644
+41 −0
Original line number Diff line number Diff line 
/*

 * Copyright (c) 2016 Qualcomm Atheros, Inc. All rights reserved.

 * Copyright (c) 2015 The Linux Foundation. All rights reserved.

 *

 * 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.

 */



#ifndef _AHB_H_

#define _AHB_H_



#include <linux/platform_device.h>



#ifdef CONFIG_ATH10K_AHB



int ath10k_ahb_init(void);

void ath10k_ahb_exit(void);



#else /* CONFIG_ATH10K_AHB */



static inline int ath10k_ahb_init(void)

{

	return 0;

}



static inline void ath10k_ahb_exit(void)

{

}



#endif /* CONFIG_ATH10K_AHB */



#endif /* _AHB_H_ */

drivers/net/wireless/ath/ath10k/core.h

+3 −0
Original line number Diff line number Diff line
@@ -69,6 +69,7 @@ struct ath10k; 


enum ath10k_bus {

	ATH10K_BUS_PCI,

	ATH10K_BUS_AHB,

};



static inline const char *ath10k_bus_str(enum ath10k_bus bus)
@@ -76,6 +77,8 @@ static inline const char *ath10k_bus_str(enum ath10k_bus bus) 
	switch (bus) {

	case ATH10K_BUS_PCI:

		return "pci";

	case ATH10K_BUS_AHB:

		return "ahb";

	}



	return "unknown";