#ifndef __iwl_4965_hw_h__
#define __iwl_4965_hw_h__
+#include "iwl-fh.h"
+
/* EERPROM */
#define IWL4965_EEPROM_IMG_SIZE 1024
/********************* END TXPOWER *****************************************/
-/****************************/
-/* Flow Handler Definitions */
-/****************************/
-
-/**
- * This I/O area is directly read/writable by driver (e.g. Linux uses writel())
- * Addresses are offsets from device's PCI hardware base address.
- */
-#define FH_MEM_LOWER_BOUND (0x1000)
-#define FH_MEM_UPPER_BOUND (0x1EF0)
-
-/**
- * Keep-Warm (KW) buffer base address.
- *
- * Driver must allocate a 4KByte buffer that is used by 4965 for keeping the
- * host DRAM powered on (via dummy accesses to DRAM) to maintain low-latency
- * DRAM access when 4965 is Txing or Rxing. The dummy accesses prevent host
- * from going into a power-savings mode that would cause higher DRAM latency,
- * and possible data over/under-runs, before all Tx/Rx is complete.
- *
- * Driver loads IWL_FH_KW_MEM_ADDR_REG with the physical address (bits 35:4)
- * of the buffer, which must be 4K aligned. Once this is set up, the 4965
- * automatically invokes keep-warm accesses when normal accesses might not
- * be sufficient to maintain fast DRAM response.
- *
- * Bit fields:
- * 31-0: Keep-warm buffer physical base address [35:4], must be 4K aligned
- */
-#define IWL_FH_KW_MEM_ADDR_REG (FH_MEM_LOWER_BOUND + 0x97C)
-
-
-/**
- * TFD Circular Buffers Base (CBBC) addresses
- *
- * 4965 has 16 base pointer registers, one for each of 16 host-DRAM-resident
- * circular buffers (CBs/queues) containing Transmit Frame Descriptors (TFDs)
- * (see struct iwl_tfd_frame). These 16 pointer registers are offset by 0x04
- * bytes from one another. Each TFD circular buffer in DRAM must be 256-byte
- * aligned (address bits 0-7 must be 0).
- *
- * Bit fields in each pointer register:
- * 27-0: TFD CB physical base address [35:8], must be 256-byte aligned
- */
-#define FH_MEM_CBBC_LOWER_BOUND (FH_MEM_LOWER_BOUND + 0x9D0)
-#define FH_MEM_CBBC_UPPER_BOUND (FH_MEM_LOWER_BOUND + 0xA10)
-
-/* Find TFD CB base pointer for given queue (range 0-15). */
-#define FH_MEM_CBBC_QUEUE(x) (FH_MEM_CBBC_LOWER_BOUND + (x) * 0x4)
-
-
-/**
- * Rx SRAM Control and Status Registers (RSCSR)
- *
- * These registers provide handshake between driver and 4965 for the Rx queue
- * (this queue handles *all* command responses, notifications, Rx data, etc.
- * sent from 4965 uCode to host driver). Unlike Tx, there is only one Rx
- * queue, and only one Rx DMA/FIFO channel. Also unlike Tx, which can
- * concatenate up to 20 DRAM buffers to form a Tx frame, each Receive Buffer
- * Descriptor (RBD) points to only one Rx Buffer (RB); there is a 1:1
- * mapping between RBDs and RBs.
- *
- * Driver must allocate host DRAM memory for the following, and set the
- * physical address of each into 4965 registers:
- *
- * 1) Receive Buffer Descriptor (RBD) circular buffer (CB), typically with 256
- * entries (although any power of 2, up to 4096, is selectable by driver).
- * Each entry (1 dword) points to a receive buffer (RB) of consistent size
- * (typically 4K, although 8K or 16K are also selectable by driver).
- * Driver sets up RB size and number of RBDs in the CB via Rx config
- * register FH_MEM_RCSR_CHNL0_CONFIG_REG.
- *
- * Bit fields within one RBD:
- * 27-0: Receive Buffer physical address bits [35:8], 256-byte aligned
- *
- * Driver sets physical address [35:8] of base of RBD circular buffer
- * into FH_RSCSR_CHNL0_RBDCB_BASE_REG [27:0].
- *
- * 2) Rx status buffer, 8 bytes, in which 4965 indicates which Rx Buffers
- * (RBs) have been filled, via a "write pointer", actually the index of
- * the RB's corresponding RBD within the circular buffer. Driver sets
- * physical address [35:4] into FH_RSCSR_CHNL0_STTS_WPTR_REG [31:0].
- *
- * Bit fields in lower dword of Rx status buffer (upper dword not used
- * by driver; see struct iwl4965_shared, val0):
- * 31-12: Not used by driver
- * 11- 0: Index of last filled Rx buffer descriptor
- * (4965 writes, driver reads this value)
- *
- * As the driver prepares Receive Buffers (RBs) for 4965 to fill, driver must
- * enter pointers to these RBs into contiguous RBD circular buffer entries,
- * and update the 4965's "write" index register, FH_RSCSR_CHNL0_RBDCB_WPTR_REG.
- *
- * This "write" index corresponds to the *next* RBD that the driver will make
- * available, i.e. one RBD past the tail of the ready-to-fill RBDs within
- * the circular buffer. This value should initially be 0 (before preparing any
- * RBs), should be 8 after preparing the first 8 RBs (for example), and must
- * wrap back to 0 at the end of the circular buffer (but don't wrap before
- * "read" index has advanced past 1! See below).
- * NOTE: 4965 EXPECTS THE WRITE INDEX TO BE INCREMENTED IN MULTIPLES OF 8.
- *
- * As the 4965 fills RBs (referenced from contiguous RBDs within the circular
- * buffer), it updates the Rx status buffer in host DRAM, 2) described above,
- * to tell the driver the index of the latest filled RBD. The driver must
- * read this "read" index from DRAM after receiving an Rx interrupt from 4965.
- *
- * The driver must also internally keep track of a third index, which is the
- * next RBD to process. When receiving an Rx interrupt, driver should process
- * all filled but unprocessed RBs up to, but not including, the RB
- * corresponding to the "read" index. For example, if "read" index becomes "1",
- * driver may process the RB pointed to by RBD 0. Depending on volume of
- * traffic, there may be many RBs to process.
- *
- * If read index == write index, 4965 thinks there is no room to put new data.
- * Due to this, the maximum number of filled RBs is 255, instead of 256. To
- * be safe, make sure that there is a gap of at least 2 RBDs between "write"
- * and "read" indexes; that is, make sure that there are no more than 254
- * buffers waiting to be filled.
- */
-#define FH_MEM_RSCSR_LOWER_BOUND (FH_MEM_LOWER_BOUND + 0xBC0)
-#define FH_MEM_RSCSR_UPPER_BOUND (FH_MEM_LOWER_BOUND + 0xC00)
-#define FH_MEM_RSCSR_CHNL0 (FH_MEM_RSCSR_LOWER_BOUND)
-
-/**
- * Physical base address of 8-byte Rx Status buffer.
- * Bit fields:
- * 31-0: Rx status buffer physical base address [35:4], must 16-byte aligned.
- */
-#define FH_RSCSR_CHNL0_STTS_WPTR_REG (FH_MEM_RSCSR_CHNL0)
-
-/**
- * Physical base address of Rx Buffer Descriptor Circular Buffer.
- * Bit fields:
- * 27-0: RBD CD physical base address [35:8], must be 256-byte aligned.
- */
-#define FH_RSCSR_CHNL0_RBDCB_BASE_REG (FH_MEM_RSCSR_CHNL0 + 0x004)
-
-/**
- * Rx write pointer (index, really!).
- * Bit fields:
- * 11-0: Index of driver's most recent prepared-to-be-filled RBD, + 1.
- * NOTE: For 256-entry circular buffer, use only bits [7:0].
- */
-#define FH_RSCSR_CHNL0_RBDCB_WPTR_REG (FH_MEM_RSCSR_CHNL0 + 0x008)
-#define FH_RSCSR_CHNL0_WPTR (FH_RSCSR_CHNL0_RBDCB_WPTR_REG)
-
-
-/**
- * Rx Config/Status Registers (RCSR)
- * Rx Config Reg for channel 0 (only channel used)
- *
- * Driver must initialize FH_MEM_RCSR_CHNL0_CONFIG_REG as follows for
- * normal operation (see bit fields).
- *
- * Clearing FH_MEM_RCSR_CHNL0_CONFIG_REG to 0 turns off Rx DMA.
- * Driver should poll FH_MEM_RSSR_RX_STATUS_REG for
- * FH_RSSR_CHNL0_RX_STATUS_CHNL_IDLE (bit 24) before continuing.
- *
- * Bit fields:
- * 31-30: Rx DMA channel enable: '00' off/pause, '01' pause at end of frame,
- * '10' operate normally
- * 29-24: reserved
- * 23-20: # RBDs in circular buffer = 2^value; use "8" for 256 RBDs (normal),
- * min "5" for 32 RBDs, max "12" for 4096 RBDs.
- * 19-18: reserved
- * 17-16: size of each receive buffer; '00' 4K (normal), '01' 8K,
- * '10' 12K, '11' 16K.
- * 15-14: reserved
- * 13-12: IRQ destination; '00' none, '01' host driver (normal operation)
- * 11- 4: timeout for closing Rx buffer and interrupting host (units 32 usec)
- * typical value 0x10 (about 1/2 msec)
- * 3- 0: reserved
- */
-#define FH_MEM_RCSR_LOWER_BOUND (FH_MEM_LOWER_BOUND + 0xC00)
-#define FH_MEM_RCSR_UPPER_BOUND (FH_MEM_LOWER_BOUND + 0xCC0)
-#define FH_MEM_RCSR_CHNL0 (FH_MEM_RCSR_LOWER_BOUND)
-
-#define FH_MEM_RCSR_CHNL0_CONFIG_REG (FH_MEM_RCSR_CHNL0)
-
-#define FH_RCSR_CHNL0_RX_CONFIG_RB_TIMEOUT_MASK (0x00000FF0) /* bit 4-11 */
-#define FH_RCSR_CHNL0_RX_CONFIG_IRQ_DEST_MASK (0x00001000) /* bit 12 */
-#define FH_RCSR_CHNL0_RX_CONFIG_SINGLE_FRAME_MASK (0x00008000) /* bit 15 */
-#define FH_RCSR_CHNL0_RX_CONFIG_RB_SIZE_MASK (0x00030000) /* bits 16-17 */
-#define FH_RCSR_CHNL0_RX_CONFIG_RBDBC_SIZE_MASK (0x00F00000) /* bits 20-23 */
-#define FH_RCSR_CHNL0_RX_CONFIG_DMA_CHNL_EN_MASK (0xC0000000) /* bits 30-31 */
-
-#define FH_RCSR_RX_CONFIG_RBDCB_SIZE_BITSHIFT (20)
-#define FH_RCSR_RX_CONFIG_REG_IRQ_RBTH_BITSHIFT (4)
-#define RX_RB_TIMEOUT (0x10)
-
-#define FH_RCSR_RX_CONFIG_CHNL_EN_PAUSE_VAL (0x00000000)
-#define FH_RCSR_RX_CONFIG_CHNL_EN_PAUSE_EOF_VAL (0x40000000)
-#define FH_RCSR_RX_CONFIG_CHNL_EN_ENABLE_VAL (0x80000000)
-
-#define FH_RCSR_RX_CONFIG_REG_VAL_RB_SIZE_4K (0x00000000)
-#define FH_RCSR_RX_CONFIG_REG_VAL_RB_SIZE_8K (0x00010000)
-#define FH_RCSR_RX_CONFIG_REG_VAL_RB_SIZE_12K (0x00020000)
-#define FH_RCSR_RX_CONFIG_REG_VAL_RB_SIZE_16K (0x00030000)
-
-#define FH_RCSR_CHNL0_RX_CONFIG_IRQ_DEST_NO_INT_VAL (0x00000000)
-#define FH_RCSR_CHNL0_RX_CONFIG_IRQ_DEST_INT_HOST_VAL (0x00001000)
-
-
-/**
- * Rx Shared Status Registers (RSSR)
- *
- * After stopping Rx DMA channel (writing 0 to FH_MEM_RCSR_CHNL0_CONFIG_REG),
- * driver must poll FH_MEM_RSSR_RX_STATUS_REG until Rx channel is idle.
- *
- * Bit fields:
- * 24: 1 = Channel 0 is idle
- *
- * FH_MEM_RSSR_SHARED_CTRL_REG and FH_MEM_RSSR_RX_ENABLE_ERR_IRQ2DRV contain
- * default values that should not be altered by the driver.
- */
-#define FH_MEM_RSSR_LOWER_BOUND (FH_MEM_LOWER_BOUND + 0xC40)
-#define FH_MEM_RSSR_UPPER_BOUND (FH_MEM_LOWER_BOUND + 0xD00)
-
-#define FH_MEM_RSSR_SHARED_CTRL_REG (FH_MEM_RSSR_LOWER_BOUND)
-#define FH_MEM_RSSR_RX_STATUS_REG (FH_MEM_RSSR_LOWER_BOUND + 0x004)
-#define FH_MEM_RSSR_RX_ENABLE_ERR_IRQ2DRV (FH_MEM_RSSR_LOWER_BOUND + 0x008)
-
-#define FH_RSSR_CHNL0_RX_STATUS_CHNL_IDLE (0x01000000)
-
-
-/**
- * Transmit DMA Channel Control/Status Registers (TCSR)
- *
- * 4965 has one configuration register for each of 8 Tx DMA/FIFO channels
- * supported in hardware (don't confuse these with the 16 Tx queues in DRAM,
- * which feed the DMA/FIFO channels); config regs are separated by 0x20 bytes.
- *
- * To use a Tx DMA channel, driver must initialize its
- * IWL_FH_TCSR_CHNL_TX_CONFIG_REG(chnl) with:
- *
- * IWL_FH_TCSR_TX_CONFIG_REG_VAL_DMA_CHNL_ENABLE |
- * IWL_FH_TCSR_TX_CONFIG_REG_VAL_DMA_CREDIT_ENABLE_VAL
- *
- * All other bits should be 0.
- *
- * Bit fields:
- * 31-30: Tx DMA channel enable: '00' off/pause, '01' pause at end of frame,
- * '10' operate normally
- * 29- 4: Reserved, set to "0"
- * 3: Enable internal DMA requests (1, normal operation), disable (0)
- * 2- 0: Reserved, set to "0"
- */
-#define IWL_FH_TCSR_LOWER_BOUND (FH_MEM_LOWER_BOUND + 0xD00)
-#define IWL_FH_TCSR_UPPER_BOUND (FH_MEM_LOWER_BOUND + 0xE60)
-
-/* Find Control/Status reg for given Tx DMA/FIFO channel */
-#define IWL_FH_TCSR_CHNL_TX_CONFIG_REG(_chnl) \
- (IWL_FH_TCSR_LOWER_BOUND + 0x20 * _chnl)
-
-#define IWL_FH_TCSR_TX_CONFIG_REG_VAL_DMA_CREDIT_DISABLE_VAL (0x00000000)
-#define IWL_FH_TCSR_TX_CONFIG_REG_VAL_DMA_CREDIT_ENABLE_VAL (0x00000008)
-
-#define IWL_FH_TCSR_TX_CONFIG_REG_VAL_DMA_CHNL_PAUSE (0x00000000)
-#define IWL_FH_TCSR_TX_CONFIG_REG_VAL_DMA_CHNL_PAUSE_EOF (0x40000000)
-#define IWL_FH_TCSR_TX_CONFIG_REG_VAL_DMA_CHNL_ENABLE (0x80000000)
-
-/**
- * Tx Shared Status Registers (TSSR)
- *
- * After stopping Tx DMA channel (writing 0 to
- * IWL_FH_TCSR_CHNL_TX_CONFIG_REG(chnl)), driver must poll
- * IWL_FH_TSSR_TX_STATUS_REG until selected Tx channel is idle
- * (channel's buffers empty | no pending requests).
- *
- * Bit fields:
- * 31-24: 1 = Channel buffers empty (channel 7:0)
- * 23-16: 1 = No pending requests (channel 7:0)
- */
-#define IWL_FH_TSSR_LOWER_BOUND (FH_MEM_LOWER_BOUND + 0xEA0)
-#define IWL_FH_TSSR_UPPER_BOUND (FH_MEM_LOWER_BOUND + 0xEC0)
-
-#define IWL_FH_TSSR_TX_STATUS_REG (IWL_FH_TSSR_LOWER_BOUND + 0x010)
-
-#define IWL_FH_TSSR_TX_STATUS_REG_BIT_BUFS_EMPTY(_chnl) \
- ((1 << (_chnl)) << 24)
-#define IWL_FH_TSSR_TX_STATUS_REG_BIT_NO_PEND_REQ(_chnl) \
- ((1 << (_chnl)) << 16)
-
-#define IWL_FH_TSSR_TX_STATUS_REG_MSK_CHNL_IDLE(_chnl) \
- (IWL_FH_TSSR_TX_STATUS_REG_BIT_BUFS_EMPTY(_chnl) | \
- IWL_FH_TSSR_TX_STATUS_REG_BIT_NO_PEND_REQ(_chnl))
-
static inline u8 iwl4965_hw_get_rate(__le32 rate_n_flags)
{
return le32_to_cpu(rate_n_flags) & 0xFF;
--- /dev/null
+/******************************************************************************
+ *
+ * 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 - 2008 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:
+ * James P. Ketrenos <ipw2100-admin@linux.intel.com>
+ * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
+ *
+ * BSD LICENSE
+ *
+ * Copyright(c) 2005 - 2008 Intel Corporation. All rights reserved.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * * Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in
+ * the documentation and/or other materials provided with the
+ * distribution.
+ * * Neither the name Intel Corporation nor the names of its
+ * contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ *****************************************************************************/
+
+/****************************/
+/* Flow Handler Definitions */
+/****************************/
+
+/**
+ * This I/O area is directly read/writable by driver (e.g. Linux uses writel())
+ * Addresses are offsets from device's PCI hardware base address.
+ */
+#define FH_MEM_LOWER_BOUND (0x1000)
+#define FH_MEM_UPPER_BOUND (0x1EF0)
+
+/**
+ * Keep-Warm (KW) buffer base address.
+ *
+ * Driver must allocate a 4KByte buffer that is used by 4965 for keeping the
+ * host DRAM powered on (via dummy accesses to DRAM) to maintain low-latency
+ * DRAM access when 4965 is Txing or Rxing. The dummy accesses prevent host
+ * from going into a power-savings mode that would cause higher DRAM latency,
+ * and possible data over/under-runs, before all Tx/Rx is complete.
+ *
+ * Driver loads FH_KW_MEM_ADDR_REG with the physical address (bits 35:4)
+ * of the buffer, which must be 4K aligned. Once this is set up, the 4965
+ * automatically invokes keep-warm accesses when normal accesses might not
+ * be sufficient to maintain fast DRAM response.
+ *
+ * Bit fields:
+ * 31-0: Keep-warm buffer physical base address [35:4], must be 4K aligned
+ */
+#define FH_KW_MEM_ADDR_REG (FH_MEM_LOWER_BOUND + 0x97C)
+
+
+/**
+ * TFD Circular Buffers Base (CBBC) addresses
+ *
+ * 4965 has 16 base pointer registers, one for each of 16 host-DRAM-resident
+ * circular buffers (CBs/queues) containing Transmit Frame Descriptors (TFDs)
+ * (see struct iwl_tfd_frame). These 16 pointer registers are offset by 0x04
+ * bytes from one another. Each TFD circular buffer in DRAM must be 256-byte
+ * aligned (address bits 0-7 must be 0).
+ *
+ * Bit fields in each pointer register:
+ * 27-0: TFD CB physical base address [35:8], must be 256-byte aligned
+ */
+#define FH_MEM_CBBC_LOWER_BOUND (FH_MEM_LOWER_BOUND + 0x9D0)
+#define FH_MEM_CBBC_UPPER_BOUND (FH_MEM_LOWER_BOUND + 0xA10)
+
+/* Find TFD CB base pointer for given queue (range 0-15). */
+#define FH_MEM_CBBC_QUEUE(x) (FH_MEM_CBBC_LOWER_BOUND + (x) * 0x4)
+
+
+/**
+ * Rx SRAM Control and Status Registers (RSCSR)
+ *
+ * These registers provide handshake between driver and 4965 for the Rx queue
+ * (this queue handles *all* command responses, notifications, Rx data, etc.
+ * sent from 4965 uCode to host driver). Unlike Tx, there is only one Rx
+ * queue, and only one Rx DMA/FIFO channel. Also unlike Tx, which can
+ * concatenate up to 20 DRAM buffers to form a Tx frame, each Receive Buffer
+ * Descriptor (RBD) points to only one Rx Buffer (RB); there is a 1:1
+ * mapping between RBDs and RBs.
+ *
+ * Driver must allocate host DRAM memory for the following, and set the
+ * physical address of each into 4965 registers:
+ *
+ * 1) Receive Buffer Descriptor (RBD) circular buffer (CB), typically with 256
+ * entries (although any power of 2, up to 4096, is selectable by driver).
+ * Each entry (1 dword) points to a receive buffer (RB) of consistent size
+ * (typically 4K, although 8K or 16K are also selectable by driver).
+ * Driver sets up RB size and number of RBDs in the CB via Rx config
+ * register FH_MEM_RCSR_CHNL0_CONFIG_REG.
+ *
+ * Bit fields within one RBD:
+ * 27-0: Receive Buffer physical address bits [35:8], 256-byte aligned
+ *
+ * Driver sets physical address [35:8] of base of RBD circular buffer
+ * into FH_RSCSR_CHNL0_RBDCB_BASE_REG [27:0].
+ *
+ * 2) Rx status buffer, 8 bytes, in which 4965 indicates which Rx Buffers
+ * (RBs) have been filled, via a "write pointer", actually the index of
+ * the RB's corresponding RBD within the circular buffer. Driver sets
+ * physical address [35:4] into FH_RSCSR_CHNL0_STTS_WPTR_REG [31:0].
+ *
+ * Bit fields in lower dword of Rx status buffer (upper dword not used
+ * by driver; see struct iwl4965_shared, val0):
+ * 31-12: Not used by driver
+ * 11- 0: Index of last filled Rx buffer descriptor
+ * (4965 writes, driver reads this value)
+ *
+ * As the driver prepares Receive Buffers (RBs) for 4965 to fill, driver must
+ * enter pointers to these RBs into contiguous RBD circular buffer entries,
+ * and update the 4965's "write" index register,
+ * FH_RSCSR_CHNL0_RBDCB_WPTR_REG.
+ *
+ * This "write" index corresponds to the *next* RBD that the driver will make
+ * available, i.e. one RBD past the tail of the ready-to-fill RBDs within
+ * the circular buffer. This value should initially be 0 (before preparing any
+ * RBs), should be 8 after preparing the first 8 RBs (for example), and must
+ * wrap back to 0 at the end of the circular buffer (but don't wrap before
+ * "read" index has advanced past 1! See below).
+ * NOTE: 4965 EXPECTS THE WRITE INDEX TO BE INCREMENTED IN MULTIPLES OF 8.
+ *
+ * As the 4965 fills RBs (referenced from contiguous RBDs within the circular
+ * buffer), it updates the Rx status buffer in host DRAM, 2) described above,
+ * to tell the driver the index of the latest filled RBD. The driver must
+ * read this "read" index from DRAM after receiving an Rx interrupt from 4965.
+ *
+ * The driver must also internally keep track of a third index, which is the
+ * next RBD to process. When receiving an Rx interrupt, driver should process
+ * all filled but unprocessed RBs up to, but not including, the RB
+ * corresponding to the "read" index. For example, if "read" index becomes "1",
+ * driver may process the RB pointed to by RBD 0. Depending on volume of
+ * traffic, there may be many RBs to process.
+ *
+ * If read index == write index, 4965 thinks there is no room to put new data.
+ * Due to this, the maximum number of filled RBs is 255, instead of 256. To
+ * be safe, make sure that there is a gap of at least 2 RBDs between "write"
+ * and "read" indexes; that is, make sure that there are no more than 254
+ * buffers waiting to be filled.
+ */
+#define FH_MEM_RSCSR_LOWER_BOUND (FH_MEM_LOWER_BOUND + 0xBC0)
+#define FH_MEM_RSCSR_UPPER_BOUND (FH_MEM_LOWER_BOUND + 0xC00)
+#define FH_MEM_RSCSR_CHNL0 (FH_MEM_RSCSR_LOWER_BOUND)
+
+/**
+ * Physical base address of 8-byte Rx Status buffer.
+ * Bit fields:
+ * 31-0: Rx status buffer physical base address [35:4], must 16-byte aligned.
+ */
+#define FH_RSCSR_CHNL0_STTS_WPTR_REG (FH_MEM_RSCSR_CHNL0)
+
+/**
+ * Physical base address of Rx Buffer Descriptor Circular Buffer.
+ * Bit fields:
+ * 27-0: RBD CD physical base address [35:8], must be 256-byte aligned.
+ */
+#define FH_RSCSR_CHNL0_RBDCB_BASE_REG (FH_MEM_RSCSR_CHNL0 + 0x004)
+
+/**
+ * Rx write pointer (index, really!).
+ * Bit fields:
+ * 11-0: Index of driver's most recent prepared-to-be-filled RBD, + 1.
+ * NOTE: For 256-entry circular buffer, use only bits [7:0].
+ */
+#define FH_RSCSR_CHNL0_RBDCB_WPTR_REG (FH_MEM_RSCSR_CHNL0 + 0x008)
+#define FH_RSCSR_CHNL0_WPTR (FH_RSCSR_CHNL0_RBDCB_WPTR_REG)
+
+
+/**
+ * Rx Config/Status Registers (RCSR)
+ * Rx Config Reg for channel 0 (only channel used)
+ *
+ * Driver must initialize FH_MEM_RCSR_CHNL0_CONFIG_REG as follows for
+ * normal operation (see bit fields).
+ *
+ * Clearing FH_MEM_RCSR_CHNL0_CONFIG_REG to 0 turns off Rx DMA.
+ * Driver should poll FH_MEM_RSSR_RX_STATUS_REG for
+ * FH_RSSR_CHNL0_RX_STATUS_CHNL_IDLE (bit 24) before continuing.
+ *
+ * Bit fields:
+ * 31-30: Rx DMA channel enable: '00' off/pause, '01' pause at end of frame,
+ * '10' operate normally
+ * 29-24: reserved
+ * 23-20: # RBDs in circular buffer = 2^value; use "8" for 256 RBDs (normal),
+ * min "5" for 32 RBDs, max "12" for 4096 RBDs.
+ * 19-18: reserved
+ * 17-16: size of each receive buffer; '00' 4K (normal), '01' 8K,
+ * '10' 12K, '11' 16K.
+ * 15-14: reserved
+ * 13-12: IRQ destination; '00' none, '01' host driver (normal operation)
+ * 11- 4: timeout for closing Rx buffer and interrupting host (units 32 usec)
+ * typical value 0x10 (about 1/2 msec)
+ * 3- 0: reserved
+ */
+#define FH_MEM_RCSR_LOWER_BOUND (FH_MEM_LOWER_BOUND + 0xC00)
+#define FH_MEM_RCSR_UPPER_BOUND (FH_MEM_LOWER_BOUND + 0xCC0)
+#define FH_MEM_RCSR_CHNL0 (FH_MEM_RCSR_LOWER_BOUND)
+
+#define FH_MEM_RCSR_CHNL0_CONFIG_REG (FH_MEM_RCSR_CHNL0)
+
+#define FH_RCSR_CHNL0_RX_CONFIG_RB_TIMEOUT_MSK (0x00000FF0) /* bits 4-11 */
+#define FH_RCSR_CHNL0_RX_CONFIG_IRQ_DEST_MSK (0x00001000) /* bits 12 */
+#define FH_RCSR_CHNL0_RX_CONFIG_SINGLE_FRAME_MSK (0x00008000) /* bit 15 */
+#define FH_RCSR_CHNL0_RX_CONFIG_RB_SIZE_MSK (0x00030000) /* bits 16-17 */
+#define FH_RCSR_CHNL0_RX_CONFIG_RBDBC_SIZE_MSK (0x00F00000) /* bits 20-23 */
+#define FH_RCSR_CHNL0_RX_CONFIG_DMA_CHNL_EN_MSK (0xC0000000) /* bits 30-31*/
+
+#define FH_RCSR_RX_CONFIG_RBDCB_SIZE_BITSHIFT (20)
+#define FH_RCSR_RX_CONFIG_REG_IRQ_RBTH_BITSHIFT (4)
+#define RX_RB_TIMEOUT (0x10)
+
+#define FH_RCSR_RX_CONFIG_CHNL_EN_PAUSE_VAL (0x00000000)
+#define FH_RCSR_RX_CONFIG_CHNL_EN_PAUSE_EOF_VAL (0x40000000)
+#define FH_RCSR_RX_CONFIG_CHNL_EN_ENABLE_VAL (0x80000000)
+
+#define FH_RCSR_RX_CONFIG_REG_VAL_RB_SIZE_4K (0x00000000)
+#define FH_RCSR_RX_CONFIG_REG_VAL_RB_SIZE_8K (0x00010000)
+#define FH_RCSR_RX_CONFIG_REG_VAL_RB_SIZE_12K (0x00020000)
+#define FH_RCSR_RX_CONFIG_REG_VAL_RB_SIZE_16K (0x00030000)
+
+#define FH_RCSR_CHNL0_RX_CONFIG_IRQ_DEST_NO_INT_VAL (0x00000000)
+#define FH_RCSR_CHNL0_RX_CONFIG_IRQ_DEST_INT_HOST_VAL (0x00001000)
+
+
+/**
+ * Rx Shared Status Registers (RSSR)
+ *
+ * After stopping Rx DMA channel (writing 0 to
+ * FH_MEM_RCSR_CHNL0_CONFIG_REG), driver must poll
+ * FH_MEM_RSSR_RX_STATUS_REG until Rx channel is idle.
+ *
+ * Bit fields:
+ * 24: 1 = Channel 0 is idle
+ *
+ * FH_MEM_RSSR_SHARED_CTRL_REG and FH_MEM_RSSR_RX_ENABLE_ERR_IRQ2DRV
+ * contain default values that should not be altered by the driver.
+ */
+#define FH_MEM_RSSR_LOWER_BOUND (FH_MEM_LOWER_BOUND + 0xC40)
+#define FH_MEM_RSSR_UPPER_BOUND (FH_MEM_LOWER_BOUND + 0xD00)
+
+#define FH_MEM_RSSR_SHARED_CTRL_REG (FH_MEM_RSSR_LOWER_BOUND)
+#define FH_MEM_RSSR_RX_STATUS_REG (FH_MEM_RSSR_LOWER_BOUND + 0x004)
+#define FH_MEM_RSSR_RX_ENABLE_ERR_IRQ2DRV\
+ (FH_MEM_RSSR_LOWER_BOUND + 0x008)
+
+#define FH_RSSR_CHNL0_RX_STATUS_CHNL_IDLE (0x01000000)
+
+
+/**
+ * Transmit DMA Channel Control/Status Registers (TCSR)
+ *
+ * 4965 has one configuration register for each of 8 Tx DMA/FIFO channels
+ * supported in hardware (don't confuse these with the 16 Tx queues in DRAM,
+ * which feed the DMA/FIFO channels); config regs are separated by 0x20 bytes.
+ *
+ * To use a Tx DMA channel, driver must initialize its
+ * FH_TCSR_CHNL_TX_CONFIG_REG(chnl) with:
+ *
+ * FH_TCSR_TX_CONFIG_REG_VAL_DMA_CHNL_ENABLE |
+ * FH_TCSR_TX_CONFIG_REG_VAL_DMA_CREDIT_ENABLE_VAL
+ *
+ * All other bits should be 0.
+ *
+ * Bit fields:
+ * 31-30: Tx DMA channel enable: '00' off/pause, '01' pause at end of frame,
+ * '10' operate normally
+ * 29- 4: Reserved, set to "0"
+ * 3: Enable internal DMA requests (1, normal operation), disable (0)
+ * 2- 0: Reserved, set to "0"
+ */
+#define FH_TCSR_LOWER_BOUND (FH_MEM_LOWER_BOUND + 0xD00)
+#define FH_TCSR_UPPER_BOUND (FH_MEM_LOWER_BOUND + 0xE60)
+
+/* Find Control/Status reg for given Tx DMA/FIFO channel */
+#define FH_TCSR_CHNL_TX_CONFIG_REG(_chnl) \
+ (FH_TCSR_LOWER_BOUND + 0x20 * _chnl)
+
+#define FH_TCSR_TX_CONFIG_REG_VAL_DMA_CREDIT_DISABLE_VAL (0x00000000)
+#define FH_TCSR_TX_CONFIG_REG_VAL_DMA_CREDIT_ENABLE_VAL (0x00000008)
+
+#define FH_TCSR_TX_CONFIG_REG_VAL_DMA_CHNL_PAUSE (0x00000000)
+#define FH_TCSR_TX_CONFIG_REG_VAL_DMA_CHNL_PAUSE_EOF (0x40000000)
+#define FH_TCSR_TX_CONFIG_REG_VAL_DMA_CHNL_ENABLE (0x80000000)
+
+#define FH_TCSR_CHNL_NUM (7)
+
+#define FH_TCSR_CHNL_TX_BUF_STS_REG_VAL_TFDB_EMPTY (0x00000000)
+#define FH_TCSR_CHNL_TX_BUF_STS_REG_VAL_TFDB_WAIT (0x00002000)
+#define FH_TCSR_CHNL_TX_BUF_STS_REG_VAL_TFDB_VALID (0x00000003)
+
+#define FH_TCSR_TX_CONFIG_REG_VAL_CIRQ_HOST_NOINT (0x00000000)
+#define FH_TCSR_TX_CONFIG_REG_VAL_CIRQ_HOST_ENDTFD (0x00100000)
+#define FH_TCSR_TX_CONFIG_REG_VAL_CIRQ_HOST_IFTFD (0x00200000)
+
+#define FH_TCSR_CHNL_TX_BUF_STS_REG_POS_TB_NUM (20)
+#define FH_TCSR_CHNL_TX_BUF_STS_REG_POS_TB_IDX (12)
+#define FH_TCSR_CHNL_TX_CONFIG_REG(_chnl) \
+ (FH_TCSR_LOWER_BOUND + 0x20 * _chnl)
+#define FH_TCSR_CHNL_TX_CREDIT_REG(_chnl) \
+ (FH_TCSR_LOWER_BOUND + 0x20 * _chnl + 0x4)
+#define FH_TCSR_CHNL_TX_BUF_STS_REG(_chnl) \
+ (FH_TCSR_LOWER_BOUND + 0x20 * _chnl + 0x8)
+
+/**
+ * Tx Shared Status Registers (TSSR)
+ *
+ * After stopping Tx DMA channel (writing 0 to
+ * FH_TCSR_CHNL_TX_CONFIG_REG(chnl)), driver must poll
+ * FH_TSSR_TX_STATUS_REG until selected Tx channel is idle
+ * (channel's buffers empty | no pending requests).
+ *
+ * Bit fields:
+ * 31-24: 1 = Channel buffers empty (channel 7:0)
+ * 23-16: 1 = No pending requests (channel 7:0)
+ */
+#define FH_TSSR_LOWER_BOUND (FH_MEM_LOWER_BOUND + 0xEA0)
+#define FH_TSSR_UPPER_BOUND (FH_MEM_LOWER_BOUND + 0xEC0)
+
+#define FH_TSSR_TX_STATUS_REG (FH_TSSR_LOWER_BOUND + 0x010)
+
+#define FH_TSSR_TX_STATUS_REG_BIT_BUFS_EMPTY(_chnl) ((1 << (_chnl)) << 24)
+#define FH_TSSR_TX_STATUS_REG_BIT_NO_PEND_REQ(_chnl) ((1 << (_chnl)) << 16)
+
+#define FH_TSSR_TX_STATUS_REG_MSK_CHNL_IDLE(_chnl) \
+ (FH_TSSR_TX_STATUS_REG_BIT_BUFS_EMPTY(_chnl) | \
+ FH_TSSR_TX_STATUS_REG_BIT_NO_PEND_REQ(_chnl))
+
+
+
+#define FH_REGS_LOWER_BOUND (0x1000)
+#define FH_REGS_UPPER_BOUND (0x2000)
+
+/* Tx service channels */
+#define FH_SRVC_CHNL (9)
+#define FH_SRVC_LOWER_BOUND (FH_REGS_LOWER_BOUND + 0x9C8)
+#define FH_SRVC_UPPER_BOUND (FH_REGS_LOWER_BOUND + 0x9D0)
+#define FH_SRVC_CHNL_SRAM_ADDR_REG(_chnl) \
+ (FH_SRVC_LOWER_BOUND + ((_chnl) - 9) * 0x4)
+
+/* TFDB Area - TFDs buffer table */
+#define FH_MEM_TFDIB_DRAM_ADDR_LSB_MSK (0xFFFFFFFF)
+#define FH_TFDIB_LOWER_BOUND (FH_REGS_LOWER_BOUND + 0x900)
+#define FH_TFDIB_UPPER_BOUND (FH_REGS_LOWER_BOUND + 0x958)
+#define FH_TFDIB_CTRL0_REG(_chnl) (FH_TFDIB_LOWER_BOUND + 0x8 * (_chnl))
+#define FH_TFDIB_CTRL1_REG(_chnl) (FH_TFDIB_LOWER_BOUND + 0x8 * (_chnl) + 0x4)
+
+/* TCSR: tx_config register values */
+#define FH_RSCSR_FRAME_SIZE_MSK (0x00003FFF) /* bits 0-13 */
+
projects / linux-2.6-omap-h63xx.git / commitdiff