drivers/net/wireless/ath/ath6kl/hif.h - linux - Git at Google

 /*
  * Copyright (c) 2004-2011 Atheros Communications Inc.
  * Copyright (c) 2011 Qualcomm Atheros, Inc.
  *
  * 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 HIF_H
 #define HIF_H

 #include "common.h"
 #include "core.h"

 #include <linux/scatterlist.h>

 #define BUS_REQUEST_MAX_NUM                64
 #define HIF_MBOX_BLOCK_SIZE                128
 #define HIF_MBOX0_BLOCK_SIZE               1

 #define HIF_DMA_BUFFER_SIZE (32 * 1024)
 #define CMD53_FIXED_ADDRESS 1
 #define CMD53_INCR_ADDRESS  2

 #define MAX_SCATTER_REQUESTS             4
 #define MAX_SCATTER_ENTRIES_PER_REQ      16
 #define MAX_SCATTER_REQ_TRANSFER_SIZE    (32 * 1024)

 /* Mailbox address in SDIO address space */
 #define HIF_MBOX_BASE_ADDR                 0x800
 #define HIF_MBOX_WIDTH                     0x800

 #define HIF_MBOX_END_ADDR  (HTC_MAILBOX_NUM_MAX * HIF_MBOX_WIDTH - 1)

 /* version 1 of the chip has only a 12K extended mbox range */
 #define HIF_MBOX0_EXT_BASE_ADDR  0x4000
 #define HIF_MBOX0_EXT_WIDTH      (12*1024)

 /* GMBOX addresses */
 #define HIF_GMBOX_BASE_ADDR                0x7000
 #define HIF_GMBOX_WIDTH                    0x4000

 /* interrupt mode register */
 #define CCCR_SDIO_IRQ_MODE_REG         0xF0

 /* mode to enable special 4-bit interrupt assertion without clock */
 #define SDIO_IRQ_MODE_ASYNC_4BIT_IRQ   (1 << 0)

 /* HTC runs over mailbox 0 */
 #define HTC_MAILBOX	0

 #define ATH6KL_TARGET_DEBUG_INTR_MASK     0x01

 /* FIXME: are these duplicates with MAX_SCATTER_ values in hif.h? */
 #define ATH6KL_SCATTER_ENTRIES_PER_REQ            16
 #define ATH6KL_MAX_TRANSFER_SIZE_PER_SCATTER      (16 * 1024)
 #define ATH6KL_SCATTER_REQS                       4

 #define ATH6KL_HIF_COMMUNICATION_TIMEOUT	1000

 struct bus_request {
 	struct list_head list;

 	/* request data */
 	u32 address;

 	u8 *buffer;
 	u32 length;
 	u32 request;
 	struct htc_packet *packet;
 	int status;

 	/* this is a scatter request */
 	struct hif_scatter_req *scat_req;
 };

 /* direction of transfer (read/write) */
 #define HIF_READ                    0x00000001
 #define HIF_WRITE                   0x00000002
 #define HIF_DIR_MASK                (HIF_READ | HIF_WRITE)

 /*
  *     emode - This indicates the whether the command is to be executed in a
  *             blocking or non-blocking fashion (HIF_SYNCHRONOUS/
  *             HIF_ASYNCHRONOUS). The read/write data paths in HTC have been
  *             implemented using the asynchronous mode allowing the the bus
  *             driver to indicate the completion of operation through the
  *             registered callback routine. The requirement primarily comes
  *             from the contexts these operations get called from (a driver's
  *             transmit context or the ISR context in case of receive).
  *             Support for both of these modes is essential.
  */
 #define HIF_SYNCHRONOUS             0x00000010
 #define HIF_ASYNCHRONOUS            0x00000020
 #define HIF_EMODE_MASK              (HIF_SYNCHRONOUS | HIF_ASYNCHRONOUS)

 /*
  *     dmode - An interface may support different kinds of commands based on
  *             the tradeoff between the amount of data it can carry and the
  *             setup time. Byte and Block modes are supported (HIF_BYTE_BASIS/
  *             HIF_BLOCK_BASIS). In case of latter, the data is rounded off
  *             to the nearest block size by padding. The size of the block is
  *             configurable at compile time using the HIF_BLOCK_SIZE and is
  *             negotiated with the target during initialization after the
  *             ATH6KL interrupts are enabled.
  */
 #define HIF_BYTE_BASIS              0x00000040
 #define HIF_BLOCK_BASIS             0x00000080
 #define HIF_DMODE_MASK              (HIF_BYTE_BASIS | HIF_BLOCK_BASIS)

 /*
  *     amode - This indicates if the address has to be incremented on ATH6KL
  *             after every read/write operation (HIF?FIXED_ADDRESS/
  *             HIF_INCREMENTAL_ADDRESS).
  */
 #define HIF_FIXED_ADDRESS           0x00000100
 #define HIF_INCREMENTAL_ADDRESS     0x00000200
 #define HIF_AMODE_MASK		  (HIF_FIXED_ADDRESS | HIF_INCREMENTAL_ADDRESS)

 #define HIF_WR_ASYNC_BYTE_INC					\
 	(HIF_WRITE | HIF_ASYNCHRONOUS |				\
 	 HIF_BYTE_BASIS | HIF_INCREMENTAL_ADDRESS)

 #define HIF_WR_ASYNC_BLOCK_INC					\
 	(HIF_WRITE | HIF_ASYNCHRONOUS |				\
 	 HIF_BLOCK_BASIS | HIF_INCREMENTAL_ADDRESS)

 #define HIF_WR_SYNC_BYTE_FIX					\
 	(HIF_WRITE | HIF_SYNCHRONOUS |				\
 	 HIF_BYTE_BASIS | HIF_FIXED_ADDRESS)

 #define HIF_WR_SYNC_BYTE_INC					\
 	(HIF_WRITE | HIF_SYNCHRONOUS |				\
 	 HIF_BYTE_BASIS | HIF_INCREMENTAL_ADDRESS)

 #define HIF_WR_SYNC_BLOCK_INC					\
 	(HIF_WRITE | HIF_SYNCHRONOUS |				\
 	 HIF_BLOCK_BASIS | HIF_INCREMENTAL_ADDRESS)

 #define HIF_RD_SYNC_BYTE_INC						\
 	(HIF_READ | HIF_SYNCHRONOUS |					\
 	 HIF_BYTE_BASIS | HIF_INCREMENTAL_ADDRESS)

 #define HIF_RD_SYNC_BYTE_FIX						\
 	(HIF_READ | HIF_SYNCHRONOUS |					\
 	 HIF_BYTE_BASIS | HIF_FIXED_ADDRESS)

 #define HIF_RD_ASYNC_BLOCK_FIX						\
 	(HIF_READ | HIF_ASYNCHRONOUS |					\
 	 HIF_BLOCK_BASIS | HIF_FIXED_ADDRESS)

 #define HIF_RD_SYNC_BLOCK_FIX						\
 	(HIF_READ | HIF_SYNCHRONOUS |					\
 	 HIF_BLOCK_BASIS | HIF_FIXED_ADDRESS)

 struct hif_scatter_item {
 	u8 *buf;
 	int len;
 	struct htc_packet *packet;
 };

 struct hif_scatter_req {
 	struct list_head list;
 	/* address for the read/write operation */
 	u32 addr;

 	/* request flags */
 	u32 req;

 	/* total length of entire transfer */
 	u32 len;

 	bool virt_scat;

 	void (*complete) (struct htc_target *, struct hif_scatter_req *);
 	int status;
 	int scat_entries;

 	struct bus_request *busrequest;
 	struct scatterlist *sgentries;

 	/* bounce buffer for upper layers to copy to/from */
 	u8 *virt_dma_buf;

 	u32 scat_q_depth;

 	struct hif_scatter_item scat_list[];
 };

 struct ath6kl_irq_proc_registers {
 	u8 host_int_status;
 	u8 cpu_int_status;
 	u8 error_int_status;
 	u8 counter_int_status;
 	u8 mbox_frame;
 	u8 rx_lkahd_valid;
 	u8 host_int_status2;
 	u8 gmbox_rx_avail;
 	__le32 rx_lkahd[2];
 	__le32 rx_gmbox_lkahd_alias[2];
 } __packed;

 struct ath6kl_irq_enable_reg {
 	u8 int_status_en;
 	u8 cpu_int_status_en;
 	u8 err_int_status_en;
 	u8 cntr_int_status_en;
 } __packed;

 struct ath6kl_device {
 	/* protects irq_proc_reg and irq_en_reg below */
 	spinlock_t lock;
 	struct ath6kl_irq_proc_registers irq_proc_reg;
 	struct ath6kl_irq_enable_reg irq_en_reg;
 	struct htc_target *htc_cnxt;
 	struct ath6kl *ar;
 };

 struct ath6kl_hif_ops {
 	int (*read_write_sync)(struct ath6kl *ar, u32 addr, u8 *buf,
 			       u32 len, u32 request);
 	int (*write_async)(struct ath6kl *ar, u32 address, u8 *buffer,
 			   u32 length, u32 request, struct htc_packet *packet);

 	void (*irq_enable)(struct ath6kl *ar);
 	void (*irq_disable)(struct ath6kl *ar);

 	struct hif_scatter_req *(*scatter_req_get)(struct ath6kl *ar);
 	void (*scatter_req_add)(struct ath6kl *ar,
 				struct hif_scatter_req *s_req);
 	int (*enable_scatter)(struct ath6kl *ar);
 	int (*scat_req_rw) (struct ath6kl *ar,
 			    struct hif_scatter_req *scat_req);
 	void (*cleanup_scatter)(struct ath6kl *ar);
 	int (*suspend)(struct ath6kl *ar, struct cfg80211_wowlan *wow);
 	int (*resume)(struct ath6kl *ar);
 	int (*diag_read32)(struct ath6kl *ar, u32 address, u32 *value);
 	int (*diag_write32)(struct ath6kl *ar, u32 address, __le32 value);
 	int (*bmi_read)(struct ath6kl *ar, u8 *buf, u32 len);
 	int (*bmi_write)(struct ath6kl *ar, u8 *buf, u32 len);
 	int (*power_on)(struct ath6kl *ar);
 	int (*power_off)(struct ath6kl *ar);
 	void (*stop)(struct ath6kl *ar);
 	int (*pipe_send)(struct ath6kl *ar, u8 pipe, struct sk_buff *hdr_buf,
 			 struct sk_buff *buf);
 	void (*pipe_get_default)(struct ath6kl *ar, u8 *pipe_ul, u8 *pipe_dl);
 	int (*pipe_map_service)(struct ath6kl *ar, u16 service_id, u8 *pipe_ul,
 				u8 *pipe_dl);
 	u16 (*pipe_get_free_queue_number)(struct ath6kl *ar, u8 pipe);
 };

 int ath6kl_hif_setup(struct ath6kl_device *dev);
 int ath6kl_hif_unmask_intrs(struct ath6kl_device *dev);
 int ath6kl_hif_mask_intrs(struct ath6kl_device *dev);
 int ath6kl_hif_poll_mboxmsg_rx(struct ath6kl_device *dev,
 			       u32 *lk_ahd, int timeout);
 int ath6kl_hif_rx_control(struct ath6kl_device *dev, bool enable_rx);
 int ath6kl_hif_disable_intrs(struct ath6kl_device *dev);

 int ath6kl_hif_rw_comp_handler(void *context, int status);
 int ath6kl_hif_intr_bh_handler(struct ath6kl *ar);

 /* Scatter Function and Definitions */
 int ath6kl_hif_submit_scat_req(struct ath6kl_device *dev,
 			       struct hif_scatter_req *scat_req, bool read);

 #endif
	/*
	* Copyright (c) 2004-2011 Atheros Communications Inc.
	* Copyright (c) 2011 Qualcomm Atheros, Inc.
	*
	* 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 HIF_H
	#define HIF_H

	#include "common.h"
	#include "core.h"

	#include <linux/scatterlist.h>

	#define BUS_REQUEST_MAX_NUM 64
	#define HIF_MBOX_BLOCK_SIZE 128
	#define HIF_MBOX0_BLOCK_SIZE 1

	#define HIF_DMA_BUFFER_SIZE (32 * 1024)
	#define CMD53_FIXED_ADDRESS 1
	#define CMD53_INCR_ADDRESS 2

	#define MAX_SCATTER_REQUESTS 4
	#define MAX_SCATTER_ENTRIES_PER_REQ 16
	#define MAX_SCATTER_REQ_TRANSFER_SIZE (32 * 1024)

	/* Mailbox address in SDIO address space */
	#define HIF_MBOX_BASE_ADDR 0x800
	#define HIF_MBOX_WIDTH 0x800

	#define HIF_MBOX_END_ADDR (HTC_MAILBOX_NUM_MAX * HIF_MBOX_WIDTH - 1)

	/* version 1 of the chip has only a 12K extended mbox range */
	#define HIF_MBOX0_EXT_BASE_ADDR 0x4000
	#define HIF_MBOX0_EXT_WIDTH (12*1024)

	/* GMBOX addresses */
	#define HIF_GMBOX_BASE_ADDR 0x7000
	#define HIF_GMBOX_WIDTH 0x4000

	/* interrupt mode register */
	#define CCCR_SDIO_IRQ_MODE_REG 0xF0

	/* mode to enable special 4-bit interrupt assertion without clock */
	#define SDIO_IRQ_MODE_ASYNC_4BIT_IRQ (1 << 0)

	/* HTC runs over mailbox 0 */
	#define HTC_MAILBOX 0

	#define ATH6KL_TARGET_DEBUG_INTR_MASK 0x01

	/* FIXME: are these duplicates with MAX_SCATTER_ values in hif.h? */
	#define ATH6KL_SCATTER_ENTRIES_PER_REQ 16
	#define ATH6KL_MAX_TRANSFER_SIZE_PER_SCATTER (16 * 1024)
	#define ATH6KL_SCATTER_REQS 4

	#define ATH6KL_HIF_COMMUNICATION_TIMEOUT 1000

	struct bus_request {
	struct list_head list;

	/* request data */
	u32 address;

	u8 *buffer;
	u32 length;
	u32 request;
	struct htc_packet *packet;
	int status;

	/* this is a scatter request */
	struct hif_scatter_req *scat_req;
	};

	/* direction of transfer (read/write) */
	#define HIF_READ 0x00000001
	#define HIF_WRITE 0x00000002
	#define HIF_DIR_MASK (HIF_READ \| HIF_WRITE)

	/*
	* emode - This indicates the whether the command is to be executed in a
	* blocking or non-blocking fashion (HIF_SYNCHRONOUS/
	* HIF_ASYNCHRONOUS). The read/write data paths in HTC have been
	* implemented using the asynchronous mode allowing the the bus
	* driver to indicate the completion of operation through the
	* registered callback routine. The requirement primarily comes
	* from the contexts these operations get called from (a driver's
	* transmit context or the ISR context in case of receive).
	* Support for both of these modes is essential.
	*/
	#define HIF_SYNCHRONOUS 0x00000010
	#define HIF_ASYNCHRONOUS 0x00000020
	#define HIF_EMODE_MASK (HIF_SYNCHRONOUS \| HIF_ASYNCHRONOUS)

	/*
	* dmode - An interface may support different kinds of commands based on
	* the tradeoff between the amount of data it can carry and the
	* setup time. Byte and Block modes are supported (HIF_BYTE_BASIS/
	* HIF_BLOCK_BASIS). In case of latter, the data is rounded off
	* to the nearest block size by padding. The size of the block is
	* configurable at compile time using the HIF_BLOCK_SIZE and is
	* negotiated with the target during initialization after the
	* ATH6KL interrupts are enabled.
	*/
	#define HIF_BYTE_BASIS 0x00000040
	#define HIF_BLOCK_BASIS 0x00000080
	#define HIF_DMODE_MASK (HIF_BYTE_BASIS \| HIF_BLOCK_BASIS)

	/*
	* amode - This indicates if the address has to be incremented on ATH6KL
	* after every read/write operation (HIF?FIXED_ADDRESS/
	* HIF_INCREMENTAL_ADDRESS).
	*/
	#define HIF_FIXED_ADDRESS 0x00000100
	#define HIF_INCREMENTAL_ADDRESS 0x00000200
	#define HIF_AMODE_MASK (HIF_FIXED_ADDRESS \| HIF_INCREMENTAL_ADDRESS)

	#define HIF_WR_ASYNC_BYTE_INC \
	(HIF_WRITE \| HIF_ASYNCHRONOUS \| \
	HIF_BYTE_BASIS \| HIF_INCREMENTAL_ADDRESS)

	#define HIF_WR_ASYNC_BLOCK_INC \
	(HIF_WRITE \| HIF_ASYNCHRONOUS \| \
	HIF_BLOCK_BASIS \| HIF_INCREMENTAL_ADDRESS)

	#define HIF_WR_SYNC_BYTE_FIX \
	(HIF_WRITE \| HIF_SYNCHRONOUS \| \
	HIF_BYTE_BASIS \| HIF_FIXED_ADDRESS)

	#define HIF_WR_SYNC_BYTE_INC \
	(HIF_WRITE \| HIF_SYNCHRONOUS \| \
	HIF_BYTE_BASIS \| HIF_INCREMENTAL_ADDRESS)

	#define HIF_WR_SYNC_BLOCK_INC \
	(HIF_WRITE \| HIF_SYNCHRONOUS \| \
	HIF_BLOCK_BASIS \| HIF_INCREMENTAL_ADDRESS)

	#define HIF_RD_SYNC_BYTE_INC \
	(HIF_READ \| HIF_SYNCHRONOUS \| \
	HIF_BYTE_BASIS \| HIF_INCREMENTAL_ADDRESS)

	#define HIF_RD_SYNC_BYTE_FIX \
	(HIF_READ \| HIF_SYNCHRONOUS \| \
	HIF_BYTE_BASIS \| HIF_FIXED_ADDRESS)

	#define HIF_RD_ASYNC_BLOCK_FIX \
	(HIF_READ \| HIF_ASYNCHRONOUS \| \
	HIF_BLOCK_BASIS \| HIF_FIXED_ADDRESS)

	#define HIF_RD_SYNC_BLOCK_FIX \
	(HIF_READ \| HIF_SYNCHRONOUS \| \
	HIF_BLOCK_BASIS \| HIF_FIXED_ADDRESS)

	struct hif_scatter_item {
	u8 *buf;
	int len;
	struct htc_packet *packet;
	};

	struct hif_scatter_req {
	struct list_head list;
	/* address for the read/write operation */
	u32 addr;

	/* request flags */
	u32 req;

	/* total length of entire transfer */
	u32 len;

	bool virt_scat;

	void (complete) (struct htc_target , struct hif_scatter_req *);
	int status;
	int scat_entries;

	struct bus_request *busrequest;
	struct scatterlist *sgentries;

	/* bounce buffer for upper layers to copy to/from */
	u8 *virt_dma_buf;

	u32 scat_q_depth;

	struct hif_scatter_item scat_list[];
	};

	struct ath6kl_irq_proc_registers {
	u8 host_int_status;
	u8 cpu_int_status;
	u8 error_int_status;
	u8 counter_int_status;
	u8 mbox_frame;
	u8 rx_lkahd_valid;
	u8 host_int_status2;
	u8 gmbox_rx_avail;
	__le32 rx_lkahd[2];
	__le32 rx_gmbox_lkahd_alias[2];
	} __packed;

	struct ath6kl_irq_enable_reg {
	u8 int_status_en;
	u8 cpu_int_status_en;
	u8 err_int_status_en;
	u8 cntr_int_status_en;
	} __packed;

	struct ath6kl_device {
	/* protects irq_proc_reg and irq_en_reg below */
	spinlock_t lock;
	struct ath6kl_irq_proc_registers irq_proc_reg;
	struct ath6kl_irq_enable_reg irq_en_reg;
	struct htc_target *htc_cnxt;
	struct ath6kl *ar;
	};

	struct ath6kl_hif_ops {
	int (read_write_sync)(struct ath6kl ar, u32 addr, u8 *buf,
	u32 len, u32 request);
	int (write_async)(struct ath6kl ar, u32 address, u8 *buffer,
	u32 length, u32 request, struct htc_packet *packet);

	void (irq_enable)(struct ath6kl ar);
	void (irq_disable)(struct ath6kl ar);

	struct hif_scatter_req (scatter_req_get)(struct ath6kl *ar);
	void (scatter_req_add)(struct ath6kl ar,
	struct hif_scatter_req *s_req);
	int (enable_scatter)(struct ath6kl ar);
	int (scat_req_rw) (struct ath6kl ar,
	struct hif_scatter_req *scat_req);
	void (cleanup_scatter)(struct ath6kl ar);
	int (suspend)(struct ath6kl ar, struct cfg80211_wowlan *wow);
	int (resume)(struct ath6kl ar);
	int (diag_read32)(struct ath6kl ar, u32 address, u32 *value);
	int (diag_write32)(struct ath6kl ar, u32 address, __le32 value);
	int (bmi_read)(struct ath6kl ar, u8 *buf, u32 len);
	int (bmi_write)(struct ath6kl ar, u8 *buf, u32 len);
	int (power_on)(struct ath6kl ar);
	int (power_off)(struct ath6kl ar);
	void (stop)(struct ath6kl ar);
	int (pipe_send)(struct ath6kl ar, u8 pipe, struct sk_buff *hdr_buf,
	struct sk_buff *buf);
	void (pipe_get_default)(struct ath6kl ar, u8 pipe_ul, u8 pipe_dl);
	int (pipe_map_service)(struct ath6kl ar, u16 service_id, u8 *pipe_ul,
	u8 *pipe_dl);
	u16 (pipe_get_free_queue_number)(struct ath6kl ar, u8 pipe);
	};

	int ath6kl_hif_setup(struct ath6kl_device *dev);
	int ath6kl_hif_unmask_intrs(struct ath6kl_device *dev);
	int ath6kl_hif_mask_intrs(struct ath6kl_device *dev);
	int ath6kl_hif_poll_mboxmsg_rx(struct ath6kl_device *dev,
	u32 *lk_ahd, int timeout);
	int ath6kl_hif_rx_control(struct ath6kl_device *dev, bool enable_rx);
	int ath6kl_hif_disable_intrs(struct ath6kl_device *dev);

	int ath6kl_hif_rw_comp_handler(void *context, int status);
	int ath6kl_hif_intr_bh_handler(struct ath6kl *ar);

	/* Scatter Function and Definitions */
	int ath6kl_hif_submit_scat_req(struct ath6kl_device *dev,
	struct hif_scatter_req *scat_req, bool read);

	#endif