/******************************************************************************
*
* 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.
*
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
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* 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
*
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*
* Copyright(c) 2005 - 2011 Intel Corporation. All rights reserved.
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*****************************************************************************/
#ifndef __iwl_legacy_prph_h__
#define __iwl_legacy_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_MAX (0x01000000) /* 3945 only */
#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)
/**
* BSM (Bootstrap State Machine)
*
* The Bootstrap State Machine (BSM) stores a short bootstrap uCode program
* in special SRAM that does not power down when the embedded control
* processor is sleeping (e.g. for periodic power-saving shutdowns of radio).
*
* When powering back up after sleeps (or during initial uCode load), the BSM
* internally loads the short bootstrap program from the special SRAM into the
* embedded processor's instruction SRAM, and starts the processor so it runs
* the bootstrap program.
*
* This bootstrap program loads (via PCI busmaster DMA) instructions and data
* images for a uCode program from host DRAM locations. The host driver
* indicates DRAM locations and sizes for instruction and data images via the
* four BSM_DRAM_* registers. Once the bootstrap program loads the new program,
* the new program starts automatically.
*
* The uCode used for open-source drivers includes two programs:
*
* 1) Initialization -- performs hardware calibration and sets up some
* internal data, then notifies host via "initialize alive" notification
* (struct iwl_init_alive_resp) that it has completed all of its work.
* After signal from host, it then loads and starts the runtime program.
* The initialization program must be used when initially setting up the
* NIC after loading the driver.
*
* 2) Runtime/Protocol -- performs all normal runtime operations. This
* notifies host via "alive" notification (struct iwl_alive_resp) that it
* is ready to be used.
*
* When initializing the NIC, the host driver does the following procedure:
*
* 1) Load bootstrap program (instructions only, no data image for bootstrap)
* into bootstrap memory. Use dword writes starting at BSM_SRAM_LOWER_BOUND
*
* 2) Point (via BSM_DRAM_*) to the "initialize" uCode data and instruction
* images in host DRAM.
*
* 3) Set up BSM to copy from BSM SRAM into uCode instruction SRAM when asked:
* BSM_WR_MEM_SRC_REG = 0
* BSM_WR_MEM_DST_REG = RTC_INST_LOWER_BOUND
* BSM_WR_MEM_DWCOUNT_REG = # dwords in bootstrap instruction image
*
* 4) Load bootstrap into instruction SRAM:
* BSM_WR_CTRL_REG = BSM_WR_CTRL_REG_BIT_START
*
* 5) Wait for load completion:
* Poll BSM_WR_CTRL_REG for BSM_WR_CTRL_REG_BIT_START = 0
*
* 6) Enable future boot loads whenever NIC's power management triggers it:
* BSM_WR_CTRL_REG = BSM_WR_CTRL_REG_BIT_START_EN
*
* 7) Start the NIC by removing all reset bits:
* CSR_RESET = 0
*
* The bootstrap uCode (already in instruction SRAM) loads initialization
* uCode. Initialization uCode performs data initialization, sends
* "initialize alive" notification to host, and waits for a signal from
* host to load runtime code.
*
* 4) Point (via BSM_DRAM_*) to the "runtime" uCode data and instruction
* images in host DRAM. The last register loaded must be the instruction
* byte count register ("1" in MSbit tells initialization uCode to load
* the runtime uCode):
* BSM_DRAM_INST_BYTECOUNT_REG = byte count | BSM_DRAM_INST_LOAD
*
* 5) Wait for "alive" notification, then issue normal runtime commands.
*
* Data caching during power-downs:
*
* Just before the embedded controller powers down (e.g for automatic
* power-saving modes, or for RFKILL), uCode stores (via PCI busmaster DMA)
* a current snapshot of the embedded processor's data SRAM into host DRAM.
* This caches the data while the embedded processor's memory is powered down.
* Location and size are controlled by BSM_DRAM_DATA_* registers.
*
* NOTE: Instruction SRAM does not need to be saved, since that doesn't
* change during operation; the original image (from uCode distribution
* file) can be used for reload.
*
* When powering back up, the BSM loads the bootstrap program. Bootstrap looks
* at the BSM_DRAM_* registers, which now point to the runtime instruction
* image and the cached (modified) runtime data (*not* the initialization
* uCode). Bootstrap reloads these runtime images into SRAM, and restarts the
* uCode from where it left off before the power-down.
*
* NOTE: Initialization uCode does *not* run as part of the save/restore
* procedure.
*
* This save/restore method is mostly for autonomous power management during
* normal operation (result of POWER_TABLE_CMD). Platform suspend/resume and
* RFKILL should use complete restarts (with total re-initialization) of uCode,
* allowing total shutdown (including BSM memory).
*
* Note that, during normal operation, the host DRAM that held the initial
* startup data for the runtime code is now being used as a backup data cache
* for modified data! If you need to completely re-initialize the NIC, make
* sure that you use the runtime data image from the uCode distribution file,
* not the modified/saved runtime data. You may want to store a separate
* "clean" runtime data image in DRAM to avoid disk reads of distribution file.
*/
/* BSM bit fields */
#define BSM_WR_CTRL_REG_BIT_START (0x80000000) /* start boot load now */
#define BSM_WR_CTRL_REG_BIT_START_EN (0x40000000) /* enable boot after pwrup*/
#define BSM_DRAM_INST_LOAD (0x80000000) /* start program load now */
/* BSM addresses */
#define BSM_BASE (PRPH_BASE + 0x3400)
#define BSM_END (PRPH_BASE + 0x3800)
#define BSM_WR_CTRL_REG (BSM_BASE + 0x000) /* ctl and status */
#define BSM_WR_MEM_SRC_REG (BSM_BASE + 0x004) /* source in BSM mem */
#define BSM_WR_MEM_DST_REG (BSM_BASE + 0x008) /* dest in SRAM mem */
#define BSM_WR_DWCOUNT_REG (BSM_BASE + 0x00C) /* bytes */
#define BSM_WR_STATUS_REG (BSM_BASE + 0x010) /* bit 0: 1 == done */
/*
* Pointers and size regs for bootstrap load and data SRAM save/restore.
* NOTE: 3945 pointers use bits 31:0 of DRAM address.
* 4965 pointers use bits 35:4 of DRAM address.
*/
#define BSM_DRAM_INST_PTR_REG (BSM_BASE + 0x090)
#define BSM_DRAM_INST_BYTECOUNT_REG (BSM_BASE + 0x094)
#define BSM_DRAM_DATA_PTR_REG (BSM_BASE + 0x098)
#define BSM_DRAM_DATA_BYTECOUNT_REG (BSM_BASE + 0x09C)
/*
* BSM special memory, stays powered on during power-save sleeps.
* Read/write, address range from LOWER_BOUND to (LOWER_BOUND + SIZE -1)
*/
#define BSM_SRAM_LOWER_BOUND (PRPH_BASE + 0x3800)
#define BSM_SRAM_SIZE (1024) /* bytes */
/* 3945 Tx scheduler registers */
#define ALM_SCD_BASE (PRPH_BASE + 0x2E00)
#define ALM_SCD_MODE_REG (ALM_SCD_BASE + 0x000)
#define ALM_SCD_ARASTAT_REG (ALM_SCD_BASE + 0x004)
#define ALM_SCD_TXFACT_REG (ALM_SCD_BASE + 0x010)
#define ALM_SCD_TXF4MF_REG (ALM_SCD_BASE + 0x014)
#define ALM_SCD_TXF5MF_REG (ALM_SCD_BASE + 0x020)
#define ALM_SCD_SBYP_MODE_1_REG (ALM_SCD_BASE + 0x02C)
#define ALM_SCD_SBYP_MODE_2_REG (ALM_SCD_BASE + 0x030)
/**
* 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)
*
*
* 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.
* Driver should use SCD_WIN_SIZE and SCD_FRAME_LIMIT values to initialize
* IWL49_SCD_CONTEXT_QUEUE_OFFSET(x) values.
*/
#define SCD_WIN_SIZE 64
#define SCD_FRAME_LIMIT 64
/* SCD registers are internal, must be accessed via HBUS_TARG_PRPH regs */
#define IWL49_SCD_START_OFFSET 0xa02c00
/*
* 4965 tells driver SRAM address for internal scheduler structs via this reg.
* Value is valid only after "Alive" response from uCode.
*/
#define IWL49_SCD_SRAM_BASE_ADDR (IWL49_SCD_START_OFFSET + 0x0)
/*
* Driver may need to update queue-empty bits after changing queue's
* write and read pointers (indexes) during (re-)initialization (i.e. when
* scheduler is not tracking what's happening).
* Bit fields:
* 31-16: Write mask -- 1: update empty bit, 0: don't change empty bit
* 15-00: Empty state, one for each queue -- 1: empty, 0: non-empty
* NOTE: This register is not used by Linux driver.
*/
#define IWL49_SCD_EMPTY_BITS (IWL49_SCD_START_OFFSET + 0x4)
/*
* Physical base address of array of byte count (BC) circular buffers (CBs).
* Each Tx queue has a BC CB in host DRAM to support Scheduler-ACK mode.
* This register points to BC CB for queue 0, must be on 1024-byte boundary.
* Others are spaced by 1024 bytes.
* Each BC CB is 2 bytes * (256 + 64) = 740 bytes, followed by 384 bytes pad.
* (Index into a queue's BC CB) = (index into queue's TFD CB) = (SSN & 0xff).
* Bit fields:
* 25-00: Byte Count CB physical address [35:10], must be 1024-byte aligned.
*/
#define IWL49_SCD_DRAM_BASE_ADDR (IWL49_SCD_START_OFFSET + 0x10)
/*
* Enables any/all Tx DMA/FIFO channels.
* Scheduler generates requests for only the active channels.
* Set this to 0xff to enable all 8 channels (normal usage).
* Bit fields:
* 7- 0: Enable (1), disable (0), one bit for each channel 0-7
*/
#define IWL49_SCD_TXFACT (IWL49_SCD_START_OFFSET + 0x1c)
/*
* Queue (x) Write Pointers (indexes, really!), one for each Tx queue.
* Initialized and updated by driver as new TFDs are added to queue.
* NOTE: If using Block Ack, index must correspond to frame's
* Start Sequence Number; index = (SSN & 0xff)
* NOTE: Alternative to HBUS_TARG_WRPTR, which is what Linux driver uses?
*/
#define IWL49_SCD_QUEUE_WRPTR(x) (IWL49_SCD_START_OFFSET + 0x24 + (x) * 4)
/*
* Queue (x) Read Pointers (indexes, really!), one for each Tx queue.
* For FIFO mode, index indicates next frame to transmit.
* For Scheduler-ACK mode, index indicates first frame in Tx window.
* Initialized by driver, updated by scheduler.
*/
#define IWL49_SCD_QUEUE_RDPTR(x) (IWL49_SCD_START_OFFSET + 0x64 + (x) * 4)
/*
* Select which queues work in chain mode (1) vs. not (0).
* Use chain mode to build chains of aggregated frames.
* Bit fields:
* 31-16: Reserved
* 15-00: Mode, one bit for each queue -- 1: Chain mode, 0: one-at-a-time
* NOTE: If driver sets up queue for chain mode, it should be also set up
* Scheduler-ACK mode as well, via SCD_QUEUE_STATUS_BITS(x).
*/
#define IWL49_SCD_QUEUECHAIN_SEL (IWL49_SCD_START_OFFSET + 0xd0)
/*
* Select which queues interrupt driver when scheduler increments
* a queue's read pointer (index).
* Bit fields:
* 31-16: Reserved
* 15-00: Interrupt enable, one bit for each queue -- 1: enabled, 0: disabled
* NOTE: This functionality is apparently a no-op; driver relies on interrupts
* from Rx queue to read Tx command responses and update Tx queues.
*/
#define IWL49_SCD_INTERRUPT_MASK (IWL49_SCD_START_OFFSET + 0xe4)
/*
* Queue search status registers. One for each queue.
* Sets up queue mode and assigns queue to Tx DMA channel.
* Bit fields:
* 19-10: Write mask/enable bits for bits 0-9
* 9: Driver should init to "0"
* 8: Scheduler-ACK mode (1), non-Scheduler-ACK (i.e. FIFO) mode (0).
* Driver should init to "1" for aggregation mode, or "0" otherwise.
* 7-6: Driver should init to "0"
* 5: Window Size Left; indicates whether scheduler can request
* another TFD, based on window size, etc. Driver should init
* this bit to "1" for aggregation mode, or "0" for non-agg.
* 4-1: Tx FIFO to use (range 0-7).
* 0: Queue is active (1), not active (0).
* Other bits should be written as "0"
*
* NOTE: If enabling Scheduler-ACK mode, chain mode should also be enabled
* via SCD_QUEUECHAIN_SEL.
*/
#define IWL49_SCD_QUEUE_STATUS_BITS(x)\
(IWL49_SCD_START_OFFSET + 0x104 + (x) * 4)
/* Bit field positions */
#define IWL49_SCD_QUEUE_STTS_REG_POS_ACTIVE (0)
#define IWL49_SCD_QUEUE_STTS_REG_POS_TXF (1)
#define IWL49_SCD_QUEUE_STTS_REG_POS_WSL (5)
#define IWL49_SCD_QUEUE_STTS_REG_POS_SCD_ACK (8)
/* Write masks */
#define IWL49_SCD_QUEUE_STTS_REG_POS_SCD_ACT_EN (10)
#define IWL49_SCD_QUEUE_STTS_REG_MSK (0x0007FC00)
/**
* 4965 internal SRAM structures for scheduler, shared with driver ...
*
* Driver should clear and initialize the following areas after receiving
* "Alive" response from 4965 uCode, i.e. after initial
* uCode load, or after a uCode load done for error recovery:
*
* SCD_CONTEXT_DATA_OFFSET (size 128 bytes)
* SCD_TX_STTS_BITMAP_OFFSET (size 256 bytes)
* SCD_TRANSLATE_TBL_OFFSET (size 32 bytes)
*
* Driver accesses SRAM via HBUS_TARG_MEM_* registers.
* Driver reads base address of this scheduler area from SCD_SRAM_BASE_ADDR.
* All OFFSET values must be added to this base address.
*/
/*
* Queue context. One 8-byte entry for each of 16 queues.
*
* Driver should clear this entire area (size 0x80) to 0 after receiving
* "Alive" notification from uCode. Additionally, driver should init
* each queue's entry as follows:
*
* LS Dword bit fields:
* 0-06: Max Tx window size for Scheduler-ACK. Driver should init to 64.
*
* MS Dword bit fields:
* 16-22: Frame limit. Driver should init to 10 (0xa).
*
* Driver should init all other bits to 0.
*
* Init must be done after driver receives "Alive" response from 4965 uCode,
* and when setting up queue for aggregation.
*/
#define IWL49_SCD_CONTEXT_DATA_OFFSET 0x380
#define IWL49_SCD_CONTEXT_QUEUE_OFFSET(x) \
(IWL49_SCD_CONTEXT_DATA_OFFSET + ((x) * 8))
#define IWL49_SCD_QUEUE_CTX_REG1_WIN_SIZE_POS (0)
#define IWL49_SCD_QUEUE_CTX_REG1_WIN_SIZE_MSK (0x0000007F)
#define IWL49_SCD_QUEUE_CTX_REG2_FRAME_LIMIT_POS (16)
#define IWL49_SCD_QUEUE_CTX_REG2_FRAME_LIMIT_MSK (0x007F0000)
/*
* Tx Status Bitmap
*
* Driver should clear this entire area (size 0x100) to 0 after receiving
* "Alive" notification from uCode. Area is used only by device itself;
* no other support (besides clearing) is required from driver.
*/
#define IWL49_SCD_TX_STTS_BITMAP_OFFSET 0x400
/*
* RAxTID to queue translation mapping.
*
* When queue is in Scheduler-ACK mode, frames placed in a that queue must be
* for only one combination of receiver address (RA) and traffic ID (TID), i.e.
* one QOS priority level destined for one station (for this wireless link,
* not final destination). The SCD_TRANSLATE_TABLE area provides 16 16-bit
* mappings, one for each of the 16 queues. If queue is not in Scheduler-ACK
* mode, the device ignores the mapping value.
*
* Bit fields, for each 16-bit map:
* 15-9: Reserved, set to 0
* 8-4: Index into device's station table for recipient station
* 3-0: Traffic ID (tid), range 0-15
*
* Driver should clear this entire area (size 32 bytes) to 0 after receiving
* "Alive" notification from uCode. To update a 16-bit map value, driver
* must read a dword-aligned value from device SRAM, replace the 16-bit map
* value of interest, and write the dword value back into device SRAM.
*/
#define IWL49_SCD_TRANSLATE_TBL_OFFSET 0x500
/* Find translation table dword to read/write for given queue */
#define IWL49_SCD_TRANSLATE_TBL_OFFSET_QUEUE(x) \
((IWL49_SCD_TRANSLATE_TBL_OFFSET + ((x) * 2)) & 0xfffffffc)
#define IWL_SCD_TXFIFO_POS_TID (0)
#define IWL_SCD_TXFIFO_POS_RA (4)
#define IWL_SCD_QUEUE_RA_TID_MAP_RATID_MSK (0x01FF)
/*********************** END TX SCHEDULER *************************************/
#endif /* __iwl_legacy_prph_h__ */
