iwl-prph.h

/******************************************************************************
 *
 * This file is provided under a dual BSD/GPLv2 license.  When using or
 * redistributing this file, you may do so under either license.
 *
 * GPL LICENSE SUMMARY
 *
 * Copyright(c) 2005 - 2011 Intel Corporation. All rights reserved.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of version 2 of the GNU General Public License as
 * published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110,
 * USA
 *
 * The full GNU General Public License is included in this distribution
 * in the file called LICENSE.GPL.
 *
 * Contact Information:
 *  Intel Linux Wireless <ilw@linux.intel.com>
 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
 *
 * BSD LICENSE
 *
 * Copyright(c) 2005 - 2011 Intel Corporation. All rights reserved.
 * All rights reserved.
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 * modification, are permitted provided that the following conditions
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 *    notice, this list of conditions and the following disclaimer.
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 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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 *****************************************************************************/

#ifndef	__iwl_prph_h__
#define __iwl_prph_h__

/*
 * Registers in this file are internal, not PCI bus memory mapped.
 * Driver accesses these via HBUS_TARG_PRPH_* registers.
 */
#define PRPH_BASE	(0x00000)
#define PRPH_END	(0xFFFFF)

/* APMG (power management) constants */
#define APMG_BASE			(PRPH_BASE + 0x3000)
#define APMG_CLK_CTRL_REG		(APMG_BASE + 0x0000)
#define APMG_CLK_EN_REG			(APMG_BASE + 0x0004)
#define APMG_CLK_DIS_REG		(APMG_BASE + 0x0008)
#define APMG_PS_CTRL_REG		(APMG_BASE + 0x000c)
#define APMG_PCIDEV_STT_REG		(APMG_BASE + 0x0010)
#define APMG_RFKILL_REG			(APMG_BASE + 0x0014)
#define APMG_RTC_INT_STT_REG		(APMG_BASE + 0x001c)
#define APMG_RTC_INT_MSK_REG		(APMG_BASE + 0x0020)
#define APMG_DIGITAL_SVR_REG		(APMG_BASE + 0x0058)
#define APMG_ANALOG_SVR_REG		(APMG_BASE + 0x006C)

#define APMS_CLK_VAL_MRB_FUNC_MODE	(0x00000001)
#define APMG_CLK_VAL_DMA_CLK_RQT	(0x00000200)
#define APMG_CLK_VAL_BSM_CLK_RQT	(0x00000800)

#define APMG_PS_CTRL_EARLY_PWR_OFF_RESET_DIS	(0x00400000)
#define APMG_PS_CTRL_VAL_RESET_REQ		(0x04000000)
#define APMG_PS_CTRL_MSK_PWR_SRC		(0x03000000)
#define APMG_PS_CTRL_VAL_PWR_SRC_VMAIN		(0x00000000)
#define APMG_PS_CTRL_VAL_PWR_SRC_VAUX		(0x02000000)
#define APMG_SVR_VOLTAGE_CONFIG_BIT_MSK	(0x000001E0) /* bit 8:5 */
#define APMG_SVR_DIGITAL_VOLTAGE_1_32		(0x00000060)

#define APMG_PCIDEV_STT_VAL_L1_ACT_DIS		(0x00000800)

/**
 * Tx Scheduler
 *
 * The Tx Scheduler selects the next frame to be transmitted, choosing TFDs
 * (Transmit Frame Descriptors) from up to 16 circular Tx queues resident in
 * host DRAM.  It steers each frame's Tx command (which contains the frame
 * data) into one of up to 7 prioritized Tx DMA FIFO channels within the
 * device.  A queue maps to only one (selectable by driver) Tx DMA channel,
 * but one DMA channel may take input from several queues.
 *
 * Tx DMA FIFOs have dedicated purposes.  For 4965, they are used as follows
 * (cf. default_queue_to_tx_fifo in iwl-4965.c):
 *
 * 0 -- EDCA BK (background) frames, lowest priority
 * 1 -- EDCA BE (best effort) frames, normal priority
 * 2 -- EDCA VI (video) frames, higher priority
 * 3 -- EDCA VO (voice) and management frames, highest priority
 * 4 -- Commands (e.g. RXON, etc.)
 * 5 -- unused (HCCA)
 * 6 -- unused (HCCA)
 * 7 -- not used by driver (device-internal only)
 *
 * For 5000 series and up, they are used differently
 * (cf. iwl5000_default_queue_to_tx_fifo in iwl-5000.c):
 *
 * 0 -- EDCA BK (background) frames, lowest priority
 * 1 -- EDCA BE (best effort) frames, normal priority
 * 2 -- EDCA VI (video) frames, higher priority
 * 3 -- EDCA VO (voice) and management frames, highest priority
 * 4 -- unused
 * 5 -- unused
 * 6 -- unused
 * 7 -- Commands
 *
 * Driver should normally map queues 0-6 to Tx DMA/FIFO channels 0-6.
 * In addition, driver can map the remaining queues to Tx DMA/FIFO
 * channels 0-3 to support 11n aggregation via EDCA DMA channels.
 *
 * The driver sets up each queue to work in one of two modes:
 *
 * 1)  Scheduler-Ack, in which the scheduler automatically supports a
 *     block-ack (BA) window of up to 64 TFDs.  In this mode, each queue
 *     contains TFDs for a unique combination of Recipient Address (RA)
 *     and Traffic Identifier (TID), that is, traffic of a given
 *     Quality-Of-Service (QOS) priority, destined for a single station.
 *
 *     In scheduler-ack mode, the scheduler keeps track of the Tx status of
 *     each frame within the BA window, including whether it's been transmitted,
 *     and whether it's been acknowledged by the receiving station.  The device
 *     automatically processes block-acks received from the receiving STA,
 *     and reschedules un-acked frames to be retransmitted (successful
 *     Tx completion may end up being out-of-order).
 *
 *     The driver must maintain the queue's Byte Count table in host DRAM
 *     (struct iwl4965_sched_queue_byte_cnt_tbl) for this mode.
 *     This mode does not support fragmentation.
 *
 * 2)  FIFO (a.k.a. non-Scheduler-ACK), in which each TFD is processed in order.
 *     The device may automatically retry Tx, but will retry only one frame
 *     at a time, until receiving ACK from receiving station, or reaching
 *     retry limit and giving up.
 *
 *     The command queue (#4/#9) must use this mode!
 *     This mode does not require use of the Byte Count table in host DRAM.
 *
 * Driver controls scheduler operation via 3 means:
 * 1)  Scheduler registers
 * 2)  Shared scheduler data base in internal 4956 SRAM
 * 3)  Shared data in host DRAM
 *
 * Initialization:
 *
 * When loading, driver should allocate memory for:
 * 1)  16 TFD circular buffers, each with space for (typically) 256 TFDs.
 * 2)  16 Byte Count circular buffers in 16 KBytes contiguous memory
 *     (1024 bytes for each queue).
 *
 * After receiving "Alive" response from uCode, driver must initialize
 * the scheduler (especially for queue #4/#9, the command queue, otherwise
 * the driver can't issue commands!):
 */

/**
 * Max Tx window size is the max number of contiguous TFDs that the scheduler
 * can keep track of at one time when creating block-ack chains of frames.
 * Note that "64" matches the number of ack bits in a block-ack packet.
 */
#define SCD_WIN_SIZE				64
#define SCD_FRAME_LIMIT				64

#define IWL_SCD_TXFIFO_POS_TID			(0)
#define IWL_SCD_TXFIFO_POS_RA			(4)
#define IWL_SCD_QUEUE_RA_TID_MAP_RATID_MSK	(0x01FF)

/* agn SCD */
#define IWLAGN_SCD_QUEUE_STTS_REG_POS_TXF	(0)
#define IWLAGN_SCD_QUEUE_STTS_REG_POS_ACTIVE	(3)
#define IWLAGN_SCD_QUEUE_STTS_REG_POS_WSL	(4)
#define IWLAGN_SCD_QUEUE_STTS_REG_POS_SCD_ACT_EN (19)
#define IWLAGN_SCD_QUEUE_STTS_REG_MSK		(0x00FF0000)

#define IWLAGN_SCD_QUEUE_CTX_REG1_CREDIT_POS		(8)
#define IWLAGN_SCD_QUEUE_CTX_REG1_CREDIT_MSK		(0x00FFFF00)
#define IWLAGN_SCD_QUEUE_CTX_REG1_SUPER_CREDIT_POS	(24)
#define IWLAGN_SCD_QUEUE_CTX_REG1_SUPER_CREDIT_MSK	(0xFF000000)
#define IWLAGN_SCD_QUEUE_CTX_REG2_WIN_SIZE_POS		(0)
#define IWLAGN_SCD_QUEUE_CTX_REG2_WIN_SIZE_MSK		(0x0000007F)
#define IWLAGN_SCD_QUEUE_CTX_REG2_FRAME_LIMIT_POS	(16)
#define IWLAGN_SCD_QUEUE_CTX_REG2_FRAME_LIMIT_MSK	(0x007F0000)

#define IWLAGN_SCD_CONTEXT_DATA_OFFSET		(0x600)
#define IWLAGN_SCD_TX_STTS_BITMAP_OFFSET		(0x7B1)
#define IWLAGN_SCD_TRANSLATE_TBL_OFFSET		(0x7E0)

#define IWLAGN_SCD_CONTEXT_QUEUE_OFFSET(x)\
	(IWLAGN_SCD_CONTEXT_DATA_OFFSET + ((x) * 8))

#define IWLAGN_SCD_TRANSLATE_TBL_OFFSET_QUEUE(x) \
	((IWLAGN_SCD_TRANSLATE_TBL_OFFSET + ((x) * 2)) & 0xfffc)

#define IWLAGN_SCD_QUEUECHAIN_SEL_ALL(priv)	\
	(((1<<(priv)->hw_params.max_txq_num) - 1) &\
	(~(1<<(priv)->cmd_queue)))

#define IWLAGN_SCD_BASE			(PRPH_BASE + 0xa02c00)

#define IWLAGN_SCD_SRAM_BASE_ADDR	(IWLAGN_SCD_BASE + 0x0)
#define IWLAGN_SCD_DRAM_BASE_ADDR	(IWLAGN_SCD_BASE + 0x8)
#define IWLAGN_SCD_AIT			(IWLAGN_SCD_BASE + 0x0c)
#define IWLAGN_SCD_TXFACT		(IWLAGN_SCD_BASE + 0x10)
#define IWLAGN_SCD_ACTIVE		(IWLAGN_SCD_BASE + 0x14)
#define IWLAGN_SCD_QUEUE_WRPTR(x)	(IWLAGN_SCD_BASE + 0x18 + (x) * 4)
#define IWLAGN_SCD_QUEUE_RDPTR(x)	(IWLAGN_SCD_BASE + 0x68 + (x) * 4)
#define IWLAGN_SCD_QUEUECHAIN_SEL	(IWLAGN_SCD_BASE + 0xe8)
#define IWLAGN_SCD_AGGR_SEL		(IWLAGN_SCD_BASE + 0x248)
#define IWLAGN_SCD_INTERRUPT_MASK	(IWLAGN_SCD_BASE + 0x108)
#define IWLAGN_SCD_QUEUE_STATUS_BITS(x)	(IWLAGN_SCD_BASE + 0x10c + (x) * 4)

/*********************** END TX SCHEDULER *************************************/

#endif				/* __iwl_prph_h__ */