1
/******************************************************************************
3
* This file is provided under a dual BSD/GPLv2 license. When using or
4
* redistributing this file, you may do so under either license.
8
* Copyright(c) 2005 - 2010 Intel Corporation. All rights reserved.
10
* This program is free software; you can redistribute it and/or modify
11
* it under the terms of version 2 of the GNU General Public License as
12
* published by the Free Software Foundation.
14
* This program is distributed in the hope that it will be useful, but
15
* WITHOUT ANY WARRANTY; without even the implied warranty of
16
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
17
* General Public License for more details.
19
* You should have received a copy of the GNU General Public License
20
* along with this program; if not, write to the Free Software
21
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110,
24
* The full GNU General Public License is included in this distribution
25
* in the file called LICENSE.GPL.
27
* Contact Information:
28
* Intel Linux Wireless <ilw@linux.intel.com>
29
* Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
33
* Copyright(c) 2005 - 2010 Intel Corporation. All rights reserved.
34
* All rights reserved.
36
* Redistribution and use in source and binary forms, with or without
37
* modification, are permitted provided that the following conditions
40
* * Redistributions of source code must retain the above copyright
41
* notice, this list of conditions and the following disclaimer.
42
* * Redistributions in binary form must reproduce the above copyright
43
* notice, this list of conditions and the following disclaimer in
44
* the documentation and/or other materials provided with the
46
* * Neither the name Intel Corporation nor the names of its
47
* contributors may be used to endorse or promote products derived
48
* from this software without specific prior written permission.
50
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
51
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
52
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
53
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
54
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
55
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
56
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
57
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
58
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
59
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
60
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
62
*****************************************************************************/
66
* CSR (control and status registers)
68
* CSR registers are mapped directly into PCI bus space, and are accessible
69
* whenever platform supplies power to device, even when device is in
70
* low power states due to driver-invoked device resets
71
* (e.g. CSR_RESET_REG_FLAG_SW_RESET) or uCode-driven power-saving modes.
73
* Use iwl_write32() and iwl_read32() family to access these registers;
74
* these provide simple PCI bus access, without waking up the MAC.
75
* Do not use iwl_write_direct32() family for these registers;
76
* no need to "grab nic access" via CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ.
77
* The MAC (uCode processor, etc.) does not need to be powered up for accessing
80
* NOTE: Device does need to be awake in order to read this memory
81
* via CSR_EEPROM and CSR_OTP registers
83
#define CSR_BASE (0x000)
85
#define CSR_HW_IF_CONFIG_REG (CSR_BASE+0x000) /* hardware interface config */
86
#define CSR_INT_COALESCING (CSR_BASE+0x004) /* accum ints, 32-usec units */
87
#define CSR_INT (CSR_BASE+0x008) /* host interrupt status/ack */
88
#define CSR_INT_MASK (CSR_BASE+0x00c) /* host interrupt enable */
89
#define CSR_FH_INT_STATUS (CSR_BASE+0x010) /* busmaster int status/ack*/
90
#define CSR_GPIO_IN (CSR_BASE+0x018) /* read external chip pins */
91
#define CSR_RESET (CSR_BASE+0x020) /* busmaster enable, NMI, etc*/
92
#define CSR_GP_CNTRL (CSR_BASE+0x024)
94
/* 2nd byte of CSR_INT_COALESCING, not accessible via iwl_write32()! */
95
#define CSR_INT_PERIODIC_REG (CSR_BASE+0x005)
98
* Hardware revision info
101
* 7-4: Type of device: see CSR_HW_REV_TYPE_xxx definitions
102
* 3-2: Revision step: 0 = A, 1 = B, 2 = C, 3 = D
103
* 1-0: "Dash" (-) value, as in A-1, etc.
105
* NOTE: Revision step affects calculation of CCK txpower for 4965.
106
* NOTE: See also CSR_HW_REV_WA_REG (work-around for bug in 4965).
108
#define CSR_HW_REV (CSR_BASE+0x028)
111
* EEPROM and OTP (one-time-programmable) memory reads
113
* NOTE: Device must be awake, initialized via apm_ops.init(),
116
#define CSR_EEPROM_REG (CSR_BASE+0x02c)
117
#define CSR_EEPROM_GP (CSR_BASE+0x030)
118
#define CSR_OTP_GP_REG (CSR_BASE+0x034)
120
#define CSR_GIO_REG (CSR_BASE+0x03C)
121
#define CSR_GP_UCODE_REG (CSR_BASE+0x048)
122
#define CSR_GP_DRIVER_REG (CSR_BASE+0x050)
125
* UCODE-DRIVER GP (general purpose) mailbox registers.
126
* SET/CLR registers set/clear bit(s) if "1" is written.
128
#define CSR_UCODE_DRV_GP1 (CSR_BASE+0x054)
129
#define CSR_UCODE_DRV_GP1_SET (CSR_BASE+0x058)
130
#define CSR_UCODE_DRV_GP1_CLR (CSR_BASE+0x05c)
131
#define CSR_UCODE_DRV_GP2 (CSR_BASE+0x060)
133
#define CSR_LED_REG (CSR_BASE+0x094)
134
#define CSR_DRAM_INT_TBL_REG (CSR_BASE+0x0A0)
136
/* GIO Chicken Bits (PCI Express bus link power management) */
137
#define CSR_GIO_CHICKEN_BITS (CSR_BASE+0x100)
139
/* Analog phase-lock-loop configuration */
140
#define CSR_ANA_PLL_CFG (CSR_BASE+0x20c)
143
* CSR Hardware Revision Workaround Register. Indicates hardware rev;
144
* "step" determines CCK backoff for txpower calculation. Used for 4965 only.
145
* See also CSR_HW_REV register.
147
* 3-2: 0 = A, 1 = B, 2 = C, 3 = D step
148
* 1-0: "Dash" (-) value, as in C-1, etc.
150
#define CSR_HW_REV_WA_REG (CSR_BASE+0x22C)
152
#define CSR_DBG_HPET_MEM_REG (CSR_BASE+0x240)
153
#define CSR_DBG_LINK_PWR_MGMT_REG (CSR_BASE+0x250)
155
/* Bits for CSR_HW_IF_CONFIG_REG */
156
#define CSR49_HW_IF_CONFIG_REG_BIT_4965_R (0x00000010)
157
#define CSR_HW_IF_CONFIG_REG_MSK_BOARD_VER (0x00000C00)
158
#define CSR_HW_IF_CONFIG_REG_BIT_MAC_SI (0x00000100)
159
#define CSR_HW_IF_CONFIG_REG_BIT_RADIO_SI (0x00000200)
161
#define CSR39_HW_IF_CONFIG_REG_BIT_3945_MB (0x00000100)
162
#define CSR39_HW_IF_CONFIG_REG_BIT_3945_MM (0x00000200)
163
#define CSR39_HW_IF_CONFIG_REG_BIT_SKU_MRC (0x00000400)
164
#define CSR39_HW_IF_CONFIG_REG_BIT_BOARD_TYPE (0x00000800)
165
#define CSR39_HW_IF_CONFIG_REG_BITS_SILICON_TYPE_A (0x00000000)
166
#define CSR39_HW_IF_CONFIG_REG_BITS_SILICON_TYPE_B (0x00001000)
168
#define CSR_HW_IF_CONFIG_REG_BIT_HAP_WAKE_L1A (0x00080000)
169
#define CSR_HW_IF_CONFIG_REG_BIT_EEPROM_OWN_SEM (0x00200000)
170
#define CSR_HW_IF_CONFIG_REG_BIT_NIC_READY (0x00400000) /* PCI_OWN_SEM */
171
#define CSR_HW_IF_CONFIG_REG_BIT_NIC_PREPARE_DONE (0x02000000) /* ME_OWN */
172
#define CSR_HW_IF_CONFIG_REG_PREPARE (0x08000000) /* WAKE_ME */
174
#define CSR_INT_PERIODIC_DIS (0x00) /* disable periodic int*/
175
#define CSR_INT_PERIODIC_ENA (0xFF) /* 255*32 usec ~ 8 msec*/
177
/* interrupt flags in INTA, set by uCode or hardware (e.g. dma),
178
* acknowledged (reset) by host writing "1" to flagged bits. */
179
#define CSR_INT_BIT_FH_RX (1 << 31) /* Rx DMA, cmd responses, FH_INT[17:16] */
180
#define CSR_INT_BIT_HW_ERR (1 << 29) /* DMA hardware error FH_INT[31] */
181
#define CSR_INT_BIT_RX_PERIODIC (1 << 28) /* Rx periodic */
182
#define CSR_INT_BIT_FH_TX (1 << 27) /* Tx DMA FH_INT[1:0] */
183
#define CSR_INT_BIT_SCD (1 << 26) /* TXQ pointer advanced */
184
#define CSR_INT_BIT_SW_ERR (1 << 25) /* uCode error */
185
#define CSR_INT_BIT_RF_KILL (1 << 7) /* HW RFKILL switch GP_CNTRL[27] toggled */
186
#define CSR_INT_BIT_CT_KILL (1 << 6) /* Critical temp (chip too hot) rfkill */
187
#define CSR_INT_BIT_SW_RX (1 << 3) /* Rx, command responses, 3945 */
188
#define CSR_INT_BIT_WAKEUP (1 << 1) /* NIC controller waking up (pwr mgmt) */
189
#define CSR_INT_BIT_ALIVE (1 << 0) /* uCode interrupts once it initializes */
191
#define CSR_INI_SET_MASK (CSR_INT_BIT_FH_RX | \
192
CSR_INT_BIT_HW_ERR | \
193
CSR_INT_BIT_FH_TX | \
194
CSR_INT_BIT_SW_ERR | \
195
CSR_INT_BIT_RF_KILL | \
196
CSR_INT_BIT_SW_RX | \
197
CSR_INT_BIT_WAKEUP | \
200
/* interrupt flags in FH (flow handler) (PCI busmaster DMA) */
201
#define CSR_FH_INT_BIT_ERR (1 << 31) /* Error */
202
#define CSR_FH_INT_BIT_HI_PRIOR (1 << 30) /* High priority Rx, bypass coalescing */
203
#define CSR39_FH_INT_BIT_RX_CHNL2 (1 << 18) /* Rx channel 2 (3945 only) */
204
#define CSR_FH_INT_BIT_RX_CHNL1 (1 << 17) /* Rx channel 1 */
205
#define CSR_FH_INT_BIT_RX_CHNL0 (1 << 16) /* Rx channel 0 */
206
#define CSR39_FH_INT_BIT_TX_CHNL6 (1 << 6) /* Tx channel 6 (3945 only) */
207
#define CSR_FH_INT_BIT_TX_CHNL1 (1 << 1) /* Tx channel 1 */
208
#define CSR_FH_INT_BIT_TX_CHNL0 (1 << 0) /* Tx channel 0 */
210
#define CSR39_FH_INT_RX_MASK (CSR_FH_INT_BIT_HI_PRIOR | \
211
CSR39_FH_INT_BIT_RX_CHNL2 | \
212
CSR_FH_INT_BIT_RX_CHNL1 | \
213
CSR_FH_INT_BIT_RX_CHNL0)
216
#define CSR39_FH_INT_TX_MASK (CSR39_FH_INT_BIT_TX_CHNL6 | \
217
CSR_FH_INT_BIT_TX_CHNL1 | \
218
CSR_FH_INT_BIT_TX_CHNL0)
220
#define CSR49_FH_INT_RX_MASK (CSR_FH_INT_BIT_HI_PRIOR | \
221
CSR_FH_INT_BIT_RX_CHNL1 | \
222
CSR_FH_INT_BIT_RX_CHNL0)
224
#define CSR49_FH_INT_TX_MASK (CSR_FH_INT_BIT_TX_CHNL1 | \
225
CSR_FH_INT_BIT_TX_CHNL0)
228
#define CSR_GPIO_IN_BIT_AUX_POWER (0x00000200)
229
#define CSR_GPIO_IN_VAL_VAUX_PWR_SRC (0x00000000)
230
#define CSR_GPIO_IN_VAL_VMAIN_PWR_SRC (0x00000200)
233
#define CSR_RESET_REG_FLAG_NEVO_RESET (0x00000001)
234
#define CSR_RESET_REG_FLAG_FORCE_NMI (0x00000002)
235
#define CSR_RESET_REG_FLAG_SW_RESET (0x00000080)
236
#define CSR_RESET_REG_FLAG_MASTER_DISABLED (0x00000100)
237
#define CSR_RESET_REG_FLAG_STOP_MASTER (0x00000200)
238
#define CSR_RESET_LINK_PWR_MGMT_DISABLED (0x80000000)
241
* GP (general purpose) CONTROL REGISTER
244
* Indicates state of (platform's) hardware RF-Kill switch
245
* 26-24: POWER_SAVE_TYPE
246
* Indicates current power-saving mode:
247
* 000 -- No power saving
248
* 001 -- MAC power-down
249
* 010 -- PHY (radio) power-down
252
* Indicates current system configuration, reflecting pins on chip
253
* as forced high/low by device circuit board.
255
* Indicates MAC is entering a power-saving sleep power-down.
256
* Not a good time to access device-internal resources.
258
* Host sets this to request and maintain MAC wakeup, to allow host
259
* access to device-internal resources. Host must wait for
260
* MAC_CLOCK_READY (and !GOING_TO_SLEEP) before accessing non-CSR
263
* Host sets this to put device into fully operational D0 power mode.
264
* Host resets this after SW_RESET to put device into low power mode.
266
* Indicates MAC (ucode processor, etc.) is powered up and can run.
267
* Internal resources are accessible.
268
* NOTE: This does not indicate that the processor is actually running.
269
* NOTE: This does not indicate that 4965 or 3945 has completed
270
* init or post-power-down restore of internal SRAM memory.
271
* Use CSR_UCODE_DRV_GP1_BIT_MAC_SLEEP as indication that
272
* SRAM is restored and uCode is in normal operation mode.
273
* Later devices (5xxx/6xxx/1xxx) use non-volatile SRAM, and
274
* do not need to save/restore it.
275
* NOTE: After device reset, this bit remains "0" until host sets
278
#define CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY (0x00000001)
279
#define CSR_GP_CNTRL_REG_FLAG_INIT_DONE (0x00000004)
280
#define CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ (0x00000008)
281
#define CSR_GP_CNTRL_REG_FLAG_GOING_TO_SLEEP (0x00000010)
283
#define CSR_GP_CNTRL_REG_VAL_MAC_ACCESS_EN (0x00000001)
285
#define CSR_GP_CNTRL_REG_MSK_POWER_SAVE_TYPE (0x07000000)
286
#define CSR_GP_CNTRL_REG_FLAG_MAC_POWER_SAVE (0x04000000)
287
#define CSR_GP_CNTRL_REG_FLAG_HW_RF_KILL_SW (0x08000000)
291
#define CSR_HW_REV_TYPE_MSK (0x00000F0)
292
#define CSR_HW_REV_TYPE_3945 (0x00000D0)
293
#define CSR_HW_REV_TYPE_4965 (0x0000000)
294
#define CSR_HW_REV_TYPE_5300 (0x0000020)
295
#define CSR_HW_REV_TYPE_5350 (0x0000030)
296
#define CSR_HW_REV_TYPE_5100 (0x0000050)
297
#define CSR_HW_REV_TYPE_5150 (0x0000040)
298
#define CSR_HW_REV_TYPE_1000 (0x0000060)
299
#define CSR_HW_REV_TYPE_6x00 (0x0000070)
300
#define CSR_HW_REV_TYPE_6x50 (0x0000080)
301
#define CSR_HW_REV_TYPE_6x50g2 (0x0000084)
302
#define CSR_HW_REV_TYPE_6x00g2 (0x00000B0)
303
#define CSR_HW_REV_TYPE_NONE (0x00000F0)
306
#define CSR_EEPROM_REG_READ_VALID_MSK (0x00000001)
307
#define CSR_EEPROM_REG_BIT_CMD (0x00000002)
308
#define CSR_EEPROM_REG_MSK_ADDR (0x0000FFFC)
309
#define CSR_EEPROM_REG_MSK_DATA (0xFFFF0000)
312
#define CSR_EEPROM_GP_VALID_MSK (0x00000007) /* signature */
313
#define CSR_EEPROM_GP_IF_OWNER_MSK (0x00000180)
314
#define CSR_EEPROM_GP_BAD_SIGNATURE_BOTH_EEP_AND_OTP (0x00000000)
315
#define CSR_EEPROM_GP_BAD_SIG_EEP_GOOD_SIG_OTP (0x00000001)
316
#define CSR_EEPROM_GP_GOOD_SIG_EEP_LESS_THAN_4K (0x00000002)
317
#define CSR_EEPROM_GP_GOOD_SIG_EEP_MORE_THAN_4K (0x00000004)
319
/* One-time-programmable memory general purpose reg */
320
#define CSR_OTP_GP_REG_DEVICE_SELECT (0x00010000) /* 0 - EEPROM, 1 - OTP */
321
#define CSR_OTP_GP_REG_OTP_ACCESS_MODE (0x00020000) /* 0 - absolute, 1 - relative */
322
#define CSR_OTP_GP_REG_ECC_CORR_STATUS_MSK (0x00100000) /* bit 20 */
323
#define CSR_OTP_GP_REG_ECC_UNCORR_STATUS_MSK (0x00200000) /* bit 21 */
326
#define CSR_GP_REG_POWER_SAVE_STATUS_MSK (0x03000000) /* bit 24/25 */
327
#define CSR_GP_REG_NO_POWER_SAVE (0x00000000)
328
#define CSR_GP_REG_MAC_POWER_SAVE (0x01000000)
329
#define CSR_GP_REG_PHY_POWER_SAVE (0x02000000)
330
#define CSR_GP_REG_POWER_SAVE_ERROR (0x03000000)
334
#define CSR_GIO_REG_VAL_L0S_ENABLED (0x00000002)
337
* UCODE-DRIVER GP (general purpose) mailbox register 1
338
* Host driver and uCode write and/or read this register to communicate with
342
* Host sets this to request permanent halt of uCode, same as
343
* sending CARD_STATE command with "halt" bit set.
345
* Host sets this to request exit from CT_KILL state, i.e. host thinks
346
* device temperature is low enough to continue normal operation.
348
* Host sets this during RF KILL power-down sequence (HW, SW, CT KILL)
349
* to release uCode to clear all Tx and command queues, enter
350
* unassociated mode, and power down.
351
* NOTE: Some devices also use HBUS_TARG_MBX_C register for this bit.
353
* Host sets this when issuing CARD_STATE command to request
356
* uCode sets this when preparing a power-saving power-down.
357
* uCode resets this when power-up is complete and SRAM is sane.
358
* NOTE: 3945/4965 saves internal SRAM data to host when powering down,
359
* and must restore this data after powering back up.
360
* MAC_SLEEP is the best indication that restore is complete.
361
* Later devices (5xxx/6xxx/1xxx) use non-volatile SRAM, and
362
* do not need to save/restore it.
364
#define CSR_UCODE_DRV_GP1_BIT_MAC_SLEEP (0x00000001)
365
#define CSR_UCODE_SW_BIT_RFKILL (0x00000002)
366
#define CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED (0x00000004)
367
#define CSR_UCODE_DRV_GP1_REG_BIT_CT_KILL_EXIT (0x00000008)
370
#define CSR_GP_DRIVER_REG_BIT_RADIO_SKU_MSK (0x00000003)
371
#define CSR_GP_DRIVER_REG_BIT_RADIO_SKU_3x3_HYB (0x00000000)
372
#define CSR_GP_DRIVER_REG_BIT_RADIO_SKU_2x2_HYB (0x00000001)
373
#define CSR_GP_DRIVER_REG_BIT_RADIO_SKU_2x2_IPA (0x00000002)
374
#define CSR_GP_DRIVER_REG_BIT_CALIB_VERSION6 (0x00000004)
376
/* GIO Chicken Bits (PCI Express bus link power management) */
377
#define CSR_GIO_CHICKEN_BITS_REG_BIT_L1A_NO_L0S_RX (0x00800000)
378
#define CSR_GIO_CHICKEN_BITS_REG_BIT_DIS_L0S_EXIT_TIMER (0x20000000)
381
#define CSR_LED_BSM_CTRL_MSK (0xFFFFFFDF)
382
#define CSR_LED_REG_TRUN_ON (0x78)
383
#define CSR_LED_REG_TRUN_OFF (0x38)
386
#define CSR39_ANA_PLL_CFG_VAL (0x01000000)
387
#define CSR50_ANA_PLL_CFG_VAL (0x00880300)
390
#define CSR_DBG_HPET_MEM_REG_VAL (0xFFFF0000)
393
#define CSR_DRAM_INT_TBL_ENABLE (1 << 31)
394
#define CSR_DRAM_INIT_TBL_WRAP_CHECK (1 << 27)
397
* HBUS (Host-side Bus)
399
* HBUS registers are mapped directly into PCI bus space, but are used
400
* to indirectly access device's internal memory or registers that
401
* may be powered-down.
403
* Use iwl_write_direct32()/iwl_read_direct32() family for these registers;
404
* host must "grab nic access" via CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ
405
* to make sure the MAC (uCode processor, etc.) is powered up for accessing
406
* internal resources.
408
* Do not use iwl_write32()/iwl_read32() family to access these registers;
409
* these provide only simple PCI bus access, without waking up the MAC.
411
#define HBUS_BASE (0x400)
414
* Registers for accessing device's internal SRAM memory (e.g. SCD SRAM
415
* structures, error log, event log, verifying uCode load).
416
* First write to address register, then read from or write to data register
417
* to complete the job. Once the address register is set up, accesses to
418
* data registers auto-increment the address by one dword.
419
* Bit usage for address registers (read or write):
420
* 0-31: memory address within device
422
#define HBUS_TARG_MEM_RADDR (HBUS_BASE+0x00c)
423
#define HBUS_TARG_MEM_WADDR (HBUS_BASE+0x010)
424
#define HBUS_TARG_MEM_WDAT (HBUS_BASE+0x018)
425
#define HBUS_TARG_MEM_RDAT (HBUS_BASE+0x01c)
427
/* Mailbox C, used as workaround alternative to CSR_UCODE_DRV_GP1 mailbox */
428
#define HBUS_TARG_MBX_C (HBUS_BASE+0x030)
429
#define HBUS_TARG_MBX_C_REG_BIT_CMD_BLOCKED (0x00000004)
432
* Registers for accessing device's internal peripheral registers
433
* (e.g. SCD, BSM, etc.). First write to address register,
434
* then read from or write to data register to complete the job.
435
* Bit usage for address registers (read or write):
436
* 0-15: register address (offset) within device
437
* 24-25: (# bytes - 1) to read or write (e.g. 3 for dword)
439
#define HBUS_TARG_PRPH_WADDR (HBUS_BASE+0x044)
440
#define HBUS_TARG_PRPH_RADDR (HBUS_BASE+0x048)
441
#define HBUS_TARG_PRPH_WDAT (HBUS_BASE+0x04c)
442
#define HBUS_TARG_PRPH_RDAT (HBUS_BASE+0x050)
445
* Per-Tx-queue write pointer (index, really!)
446
* Indicates index to next TFD that driver will fill (1 past latest filled).
448
* 0-7: queue write index
449
* 11-8: queue selector
451
#define HBUS_TARG_WRPTR (HBUS_BASE+0x060)
453
#endif /* !__iwl_csr_h__ */