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1/*2 * Copyright (c) 2007-2011 Atheros Communications Inc.3 * Copyright (c) 2011-2012 Qualcomm Atheros, Inc.4 *5 * Permission to use, copy, modify, and/or distribute this software for any6 * purpose with or without fee is hereby granted, provided that the above7 * copyright notice and this permission notice appear in all copies.8 *9 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES10 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF11 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR12 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES13 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN14 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF15 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.16 */17#include "hif.h"18 19#include <linux/export.h>20 21#include "core.h"22#include "target.h"23#include "hif-ops.h"24#include "debug.h"25#include "trace.h"26 27#define MAILBOX_FOR_BLOCK_SIZE          128 29#define ATH6KL_TIME_QUANTUM	10  /* in ms */30 31static int ath6kl_hif_cp_scat_dma_buf(struct hif_scatter_req *req,32				      bool from_dma)33{34	u8 *buf;35	int i;36 37	buf = req->virt_dma_buf;38 39	for (i = 0; i < req->scat_entries; i++) {40		if (from_dma)41			memcpy(req->scat_list[i].buf, buf,42			       req->scat_list[i].len);43		else44			memcpy(buf, req->scat_list[i].buf,45			       req->scat_list[i].len);46 47		buf += req->scat_list[i].len;48	}49 50	return 0;51}52 53int ath6kl_hif_rw_comp_handler(void *context, int status)54{55	struct htc_packet *packet = context;56 57	ath6kl_dbg(ATH6KL_DBG_HIF, "hif rw completion pkt 0x%p status %d\n",58		   packet, status);59 60	packet->status = status;61	packet->completion(packet->context, packet);62 63	return 0;64}65EXPORT_SYMBOL(ath6kl_hif_rw_comp_handler);66 67#define REGISTER_DUMP_COUNT     6068#define REGISTER_DUMP_LEN_MAX   6069 70static void ath6kl_hif_dump_fw_crash(struct ath6kl *ar)71{72	__le32 regdump_val[REGISTER_DUMP_LEN_MAX];73	u32 i, address, regdump_addr = 0;74	int ret;75 76	/* the reg dump pointer is copied to the host interest area */77	address = ath6kl_get_hi_item_addr(ar, HI_ITEM(hi_failure_state));78	address = TARG_VTOP(ar->target_type, address);79 80	/* read RAM location through diagnostic window */81	ret = ath6kl_diag_read32(ar, address, &regdump_addr);82 83	if (ret || !regdump_addr) {84		ath6kl_warn("failed to get ptr to register dump area: %d\n",85			    ret);86		return;87	}88 89	ath6kl_dbg(ATH6KL_DBG_IRQ, "register dump data address 0x%x\n",90		   regdump_addr);91	regdump_addr = TARG_VTOP(ar->target_type, regdump_addr);92 93	/* fetch register dump data */94	ret = ath6kl_diag_read(ar, regdump_addr, (u8 *)&regdump_val[0],95				  REGISTER_DUMP_COUNT * (sizeof(u32)));96	if (ret) {97		ath6kl_warn("failed to get register dump: %d\n", ret);98		return;99	}100 101	ath6kl_info("crash dump:\n");102	ath6kl_info("hw 0x%x fw %s\n", ar->wiphy->hw_version,103		    ar->wiphy->fw_version);104 105	BUILD_BUG_ON(REGISTER_DUMP_COUNT % 4);106 107	for (i = 0; i < REGISTER_DUMP_COUNT; i += 4) {108		ath6kl_info("%d: 0x%8.8x 0x%8.8x 0x%8.8x 0x%8.8x\n",109			    i,110			    le32_to_cpu(regdump_val[i]),111			    le32_to_cpu(regdump_val[i + 1]),112			    le32_to_cpu(regdump_val[i + 2]),113			    le32_to_cpu(regdump_val[i + 3]));114	}115}116 117static int ath6kl_hif_proc_dbg_intr(struct ath6kl_device *dev)118{119	u32 dummy;120	int ret;121 122	ath6kl_warn("firmware crashed\n");123 124	/*125	 * read counter to clear the interrupt, the debug error interrupt is126	 * counter 0.127	 */128	ret = hif_read_write_sync(dev->ar, COUNT_DEC_ADDRESS,129				     (u8 *)&dummy, 4, HIF_RD_SYNC_BYTE_INC);130	if (ret)131		ath6kl_warn("Failed to clear debug interrupt: %d\n", ret);132 133	ath6kl_hif_dump_fw_crash(dev->ar);134	ath6kl_read_fwlogs(dev->ar);135	ath6kl_recovery_err_notify(dev->ar, ATH6KL_FW_ASSERT);136 137	return ret;138}139 140/* mailbox recv message polling */141int ath6kl_hif_poll_mboxmsg_rx(struct ath6kl_device *dev, u32 *lk_ahd,142			      int timeout)143{144	struct ath6kl_irq_proc_registers *rg;145	int status = 0, i;146	u8 htc_mbox = 1 << HTC_MAILBOX;147 148	for (i = timeout / ATH6KL_TIME_QUANTUM; i > 0; i--) {149		/* this is the standard HIF way, load the reg table */150		status = hif_read_write_sync(dev->ar, HOST_INT_STATUS_ADDRESS,151					     (u8 *) &dev->irq_proc_reg,152					     sizeof(dev->irq_proc_reg),153					     HIF_RD_SYNC_BYTE_INC);154 155		if (status) {156			ath6kl_err("failed to read reg table\n");157			return status;158		}159 160		/* check for MBOX data and valid lookahead */161		if (dev->irq_proc_reg.host_int_status & htc_mbox) {162			if (dev->irq_proc_reg.rx_lkahd_valid &163			    htc_mbox) {164				/*165				 * Mailbox has a message and the look ahead166				 * is valid.167				 */168				rg = &dev->irq_proc_reg;169				*lk_ahd =170					le32_to_cpu(rg->rx_lkahd[HTC_MAILBOX]);171				break;172			}173		}174 175		/* delay a little  */176		mdelay(ATH6KL_TIME_QUANTUM);177		ath6kl_dbg(ATH6KL_DBG_HIF, "hif retry mbox poll try %d\n", i);178	}179 180	if (i == 0) {181		ath6kl_err("timeout waiting for recv message\n");182		status = -ETIME;183		/* check if the target asserted */184		if (dev->irq_proc_reg.counter_int_status &185		    ATH6KL_TARGET_DEBUG_INTR_MASK)186			/*187			 * Target failure handler will be called in case of188			 * an assert.189			 */190			ath6kl_hif_proc_dbg_intr(dev);191	}192 193	return status;194}195 196/*197 * Disable packet reception (used in case the host runs out of buffers)198 * using the interrupt enable registers through the host I/F199 */200int ath6kl_hif_rx_control(struct ath6kl_device *dev, bool enable_rx)201{202	struct ath6kl_irq_enable_reg regs;203	int status = 0;204 205	ath6kl_dbg(ATH6KL_DBG_HIF, "hif rx %s\n",206		   enable_rx ? "enable" : "disable");207 208	/* take the lock to protect interrupt enable shadows */209	spin_lock_bh(&dev->lock);210 211	if (enable_rx)212		dev->irq_en_reg.int_status_en |=213			SM(INT_STATUS_ENABLE_MBOX_DATA, 0x01);214	else215		dev->irq_en_reg.int_status_en &=216		    ~SM(INT_STATUS_ENABLE_MBOX_DATA, 0x01);217 218	memcpy(&regs, &dev->irq_en_reg, sizeof(regs));219 220	spin_unlock_bh(&dev->lock);221 222	status = hif_read_write_sync(dev->ar, INT_STATUS_ENABLE_ADDRESS,223				     &regs.int_status_en,224				     sizeof(struct ath6kl_irq_enable_reg),225				     HIF_WR_SYNC_BYTE_INC);226 227	return status;228}229 230int ath6kl_hif_submit_scat_req(struct ath6kl_device *dev,231			      struct hif_scatter_req *scat_req, bool read)232{233	int status = 0;234 235	if (read) {236		scat_req->req = HIF_RD_SYNC_BLOCK_FIX;237		scat_req->addr = dev->ar->mbox_info.htc_addr;238	} else {239		scat_req->req = HIF_WR_ASYNC_BLOCK_INC;240 241		scat_req->addr =242			(scat_req->len > HIF_MBOX_WIDTH) ?243			dev->ar->mbox_info.htc_ext_addr :244			dev->ar->mbox_info.htc_addr;245	}246 247	ath6kl_dbg(ATH6KL_DBG_HIF,248		   "hif submit scatter request entries %d len %d mbox 0x%x %s %s\n",249		   scat_req->scat_entries, scat_req->len,250		   scat_req->addr, !read ? "async" : "sync",251		   (read) ? "rd" : "wr");252 253	if (!read && scat_req->virt_scat) {254		status = ath6kl_hif_cp_scat_dma_buf(scat_req, false);255		if (status) {256			scat_req->status = status;257			scat_req->complete(dev->ar->htc_target, scat_req);258			return 0;259		}260	}261 262	status = ath6kl_hif_scat_req_rw(dev->ar, scat_req);263 264	if (read) {265		/* in sync mode, we can touch the scatter request */266		scat_req->status = status;267		if (!status && scat_req->virt_scat)268			scat_req->status =269				ath6kl_hif_cp_scat_dma_buf(scat_req, true);270	}271 272	return status;273}274 275static int ath6kl_hif_proc_counter_intr(struct ath6kl_device *dev)276{277	u8 counter_int_status;278 279	ath6kl_dbg(ATH6KL_DBG_IRQ, "counter interrupt\n");280 281	counter_int_status = dev->irq_proc_reg.counter_int_status &282			     dev->irq_en_reg.cntr_int_status_en;283 284	ath6kl_dbg(ATH6KL_DBG_IRQ,285		   "valid interrupt source(s) in COUNTER_INT_STATUS: 0x%x\n",286		counter_int_status);287 288	/*289	 * NOTE: other modules like GMBOX may use the counter interrupt for290	 * credit flow control on other counters, we only need to check for291	 * the debug assertion counter interrupt.292	 */293	if (counter_int_status & ATH6KL_TARGET_DEBUG_INTR_MASK)294		return ath6kl_hif_proc_dbg_intr(dev);295 296	return 0;297}298 299static int ath6kl_hif_proc_err_intr(struct ath6kl_device *dev)300{301	int status;302	u8 error_int_status;303	u8 reg_buf[4];304 305	ath6kl_dbg(ATH6KL_DBG_IRQ, "error interrupt\n");306 307	error_int_status = dev->irq_proc_reg.error_int_status & 0x0F;308	if (!error_int_status) {309		WARN_ON(1);310		return -EIO;311	}312 313	ath6kl_dbg(ATH6KL_DBG_IRQ,314		   "valid interrupt source(s) in ERROR_INT_STATUS: 0x%x\n",315		   error_int_status);316 317	if (MS(ERROR_INT_STATUS_WAKEUP, error_int_status))318		ath6kl_dbg(ATH6KL_DBG_IRQ, "error : wakeup\n");319 320	if (MS(ERROR_INT_STATUS_RX_UNDERFLOW, error_int_status))321		ath6kl_err("rx underflow\n");322 323	if (MS(ERROR_INT_STATUS_TX_OVERFLOW, error_int_status))324		ath6kl_err("tx overflow\n");325 326	/* Clear the interrupt */327	dev->irq_proc_reg.error_int_status &= ~error_int_status;328 329	/* set W1C value to clear the interrupt, this hits the register first */330	reg_buf[0] = error_int_status;331	reg_buf[1] = 0;332	reg_buf[2] = 0;333	reg_buf[3] = 0;334 335	status = hif_read_write_sync(dev->ar, ERROR_INT_STATUS_ADDRESS,336				     reg_buf, 4, HIF_WR_SYNC_BYTE_FIX);337 338	WARN_ON(status);339 340	return status;341}342 343static int ath6kl_hif_proc_cpu_intr(struct ath6kl_device *dev)344{345	int status;346	u8 cpu_int_status;347	u8 reg_buf[4];348 349	ath6kl_dbg(ATH6KL_DBG_IRQ, "cpu interrupt\n");350 351	cpu_int_status = dev->irq_proc_reg.cpu_int_status &352			 dev->irq_en_reg.cpu_int_status_en;353	if (!cpu_int_status) {354		WARN_ON(1);355		return -EIO;356	}357 358	ath6kl_dbg(ATH6KL_DBG_IRQ,359		   "valid interrupt source(s) in CPU_INT_STATUS: 0x%x\n",360		cpu_int_status);361 362	/* Clear the interrupt */363	dev->irq_proc_reg.cpu_int_status &= ~cpu_int_status;364 365	/*366	 * Set up the register transfer buffer to hit the register 4 times ,367	 * this is done to make the access 4-byte aligned to mitigate issues368	 * with host bus interconnects that restrict bus transfer lengths to369	 * be a multiple of 4-bytes.370	 */371 372	/* set W1C value to clear the interrupt, this hits the register first */373	reg_buf[0] = cpu_int_status;374	/* the remaining are set to zero which have no-effect  */375	reg_buf[1] = 0;376	reg_buf[2] = 0;377	reg_buf[3] = 0;378 379	status = hif_read_write_sync(dev->ar, CPU_INT_STATUS_ADDRESS,380				     reg_buf, 4, HIF_WR_SYNC_BYTE_FIX);381 382	WARN_ON(status);383 384	return status;385}386 387/* process pending interrupts synchronously */388static int proc_pending_irqs(struct ath6kl_device *dev, bool *done)389{390	struct ath6kl_irq_proc_registers *rg;391	int status = 0;392	u8 host_int_status = 0;393	u32 lk_ahd = 0;394	u8 htc_mbox = 1 << HTC_MAILBOX;395 396	ath6kl_dbg(ATH6KL_DBG_IRQ, "proc_pending_irqs: (dev: 0x%p)\n", dev);397 398	/*399	 * NOTE: HIF implementation guarantees that the context of this400	 * call allows us to perform SYNCHRONOUS I/O, that is we can block,401	 * sleep or call any API that can block or switch thread/task402	 * contexts. This is a fully schedulable context.403	 */404 405	/*406	 * Process pending intr only when int_status_en is clear, it may407	 * result in unnecessary bus transaction otherwise. Target may be408	 * unresponsive at the time.409	 */410	if (dev->irq_en_reg.int_status_en) {411		/*412		 * Read the first 28 bytes of the HTC register table. This413		 * will yield us the value of different int status414		 * registers and the lookahead registers.415		 *416		 *    length = sizeof(int_status) + sizeof(cpu_int_status)417		 *             + sizeof(error_int_status) +418		 *             sizeof(counter_int_status) +419		 *             sizeof(mbox_frame) + sizeof(rx_lkahd_valid)420		 *             + sizeof(hole) + sizeof(rx_lkahd) +421		 *             sizeof(int_status_en) +422		 *             sizeof(cpu_int_status_en) +423		 *             sizeof(err_int_status_en) +424		 *             sizeof(cntr_int_status_en);425		 */426		status = hif_read_write_sync(dev->ar, HOST_INT_STATUS_ADDRESS,427					     (u8 *) &dev->irq_proc_reg,428					     sizeof(dev->irq_proc_reg),429					     HIF_RD_SYNC_BYTE_INC);430		if (status)431			goto out;432 433		ath6kl_dump_registers(dev, &dev->irq_proc_reg,434				      &dev->irq_en_reg);435		trace_ath6kl_sdio_irq(&dev->irq_en_reg,436				      sizeof(dev->irq_en_reg));437 438		/* Update only those registers that are enabled */439		host_int_status = dev->irq_proc_reg.host_int_status &440				  dev->irq_en_reg.int_status_en;441 442		/* Look at mbox status */443		if (host_int_status & htc_mbox) {444			/*445			 * Mask out pending mbox value, we use "lookAhead as446			 * the real flag for mbox processing.447			 */448			host_int_status &= ~htc_mbox;449			if (dev->irq_proc_reg.rx_lkahd_valid &450			    htc_mbox) {451				rg = &dev->irq_proc_reg;452				lk_ahd = le32_to_cpu(rg->rx_lkahd[HTC_MAILBOX]);453				if (!lk_ahd)454					ath6kl_err("lookAhead is zero!\n");455			}456		}457	}458 459	if (!host_int_status && !lk_ahd) {460		*done = true;461		goto out;462	}463 464	if (lk_ahd) {465		int fetched = 0;466 467		ath6kl_dbg(ATH6KL_DBG_IRQ,468			   "pending mailbox msg, lk_ahd: 0x%X\n", lk_ahd);469		/*470		 * Mailbox Interrupt, the HTC layer may issue async471		 * requests to empty the mailbox. When emptying the recv472		 * mailbox we use the async handler above called from the473		 * completion routine of the callers read request. This can474		 * improve performance by reducing context switching when475		 * we rapidly pull packets.476		 */477		status = ath6kl_htc_rxmsg_pending_handler(dev->htc_cnxt,478							  lk_ahd, &fetched);479		if (status)480			goto out;481 482		if (!fetched)483			/*484			 * HTC could not pull any messages out due to lack485			 * of resources.486			 */487			dev->htc_cnxt->chk_irq_status_cnt = 0;488	}489 490	/* now handle the rest of them */491	ath6kl_dbg(ATH6KL_DBG_IRQ,492		   "valid interrupt source(s) for other interrupts: 0x%x\n",493		   host_int_status);494 495	if (MS(HOST_INT_STATUS_CPU, host_int_status)) {496		/* CPU Interrupt */497		status = ath6kl_hif_proc_cpu_intr(dev);498		if (status)499			goto out;500	}501 502	if (MS(HOST_INT_STATUS_ERROR, host_int_status)) {503		/* Error Interrupt */504		status = ath6kl_hif_proc_err_intr(dev);505		if (status)506			goto out;507	}508 509	if (MS(HOST_INT_STATUS_COUNTER, host_int_status))510		/* Counter Interrupt */511		status = ath6kl_hif_proc_counter_intr(dev);512 513out:514	/*515	 * An optimization to bypass reading the IRQ status registers516	 * unecessarily which can re-wake the target, if upper layers517	 * determine that we are in a low-throughput mode, we can rely on518	 * taking another interrupt rather than re-checking the status519	 * registers which can re-wake the target.520	 *521	 * NOTE : for host interfaces that makes use of detecting pending522	 * mbox messages at hif can not use this optimization due to523	 * possible side effects, SPI requires the host to drain all524	 * messages from the mailbox before exiting the ISR routine.525	 */526 527	ath6kl_dbg(ATH6KL_DBG_IRQ,528		   "bypassing irq status re-check, forcing done\n");529 530	if (!dev->htc_cnxt->chk_irq_status_cnt)531		*done = true;532 533	ath6kl_dbg(ATH6KL_DBG_IRQ,534		   "proc_pending_irqs: (done:%d, status=%d\n", *done, status);535 536	return status;537}538 539/* interrupt handler, kicks off all interrupt processing */540int ath6kl_hif_intr_bh_handler(struct ath6kl *ar)541{542	struct ath6kl_device *dev = ar->htc_target->dev;543	unsigned long timeout;544	int status = 0;545	bool done = false;546 547	/*548	 * Reset counter used to flag a re-scan of IRQ status registers on549	 * the target.550	 */551	dev->htc_cnxt->chk_irq_status_cnt = 0;552 553	/*554	 * IRQ processing is synchronous, interrupt status registers can be555	 * re-read.556	 */557	timeout = jiffies + msecs_to_jiffies(ATH6KL_HIF_COMMUNICATION_TIMEOUT);558	while (time_before(jiffies, timeout) && !done) {559		status = proc_pending_irqs(dev, &done);560		if (status)561			break;562	}563 564	return status;565}566EXPORT_SYMBOL(ath6kl_hif_intr_bh_handler);567 568static int ath6kl_hif_enable_intrs(struct ath6kl_device *dev)569{570	struct ath6kl_irq_enable_reg regs;571	int status;572 573	spin_lock_bh(&dev->lock);574 575	/* Enable all but ATH6KL CPU interrupts */576	dev->irq_en_reg.int_status_en =577			SM(INT_STATUS_ENABLE_ERROR, 0x01) |578			SM(INT_STATUS_ENABLE_CPU, 0x01) |579			SM(INT_STATUS_ENABLE_COUNTER, 0x01);580 581	/*582	 * NOTE: There are some cases where HIF can do detection of583	 * pending mbox messages which is disabled now.584	 */585	dev->irq_en_reg.int_status_en |= SM(INT_STATUS_ENABLE_MBOX_DATA, 0x01);586 587	/* Set up the CPU Interrupt status Register */588	dev->irq_en_reg.cpu_int_status_en = 0;589 590	/* Set up the Error Interrupt status Register */591	dev->irq_en_reg.err_int_status_en =592		SM(ERROR_STATUS_ENABLE_RX_UNDERFLOW, 0x01) |593		SM(ERROR_STATUS_ENABLE_TX_OVERFLOW, 0x1);594 595	/*596	 * Enable Counter interrupt status register to get fatal errors for597	 * debugging.598	 */599	dev->irq_en_reg.cntr_int_status_en = SM(COUNTER_INT_STATUS_ENABLE_BIT,600						ATH6KL_TARGET_DEBUG_INTR_MASK);601	memcpy(&regs, &dev->irq_en_reg, sizeof(regs));602 603	spin_unlock_bh(&dev->lock);604 605	status = hif_read_write_sync(dev->ar, INT_STATUS_ENABLE_ADDRESS,606				     &regs.int_status_en, sizeof(regs),607				     HIF_WR_SYNC_BYTE_INC);608 609	if (status)610		ath6kl_err("failed to update interrupt ctl reg err: %d\n",611			   status);612 613	return status;614}615 616int ath6kl_hif_disable_intrs(struct ath6kl_device *dev)617{618	struct ath6kl_irq_enable_reg regs;619 620	spin_lock_bh(&dev->lock);621	/* Disable all interrupts */622	dev->irq_en_reg.int_status_en = 0;623	dev->irq_en_reg.cpu_int_status_en = 0;624	dev->irq_en_reg.err_int_status_en = 0;625	dev->irq_en_reg.cntr_int_status_en = 0;626	memcpy(&regs, &dev->irq_en_reg, sizeof(regs));627	spin_unlock_bh(&dev->lock);628 629	return hif_read_write_sync(dev->ar, INT_STATUS_ENABLE_ADDRESS,630				   &regs.int_status_en, sizeof(regs),631				   HIF_WR_SYNC_BYTE_INC);632}633 634/* enable device interrupts */635int ath6kl_hif_unmask_intrs(struct ath6kl_device *dev)636{637	int status = 0;638 639	/*640	 * Make sure interrupt are disabled before unmasking at the HIF641	 * layer. The rationale here is that between device insertion642	 * (where we clear the interrupts the first time) and when HTC643	 * is finally ready to handle interrupts, other software can perform644	 * target "soft" resets. The ATH6KL interrupt enables reset back to an645	 * "enabled" state when this happens.646	 */647	ath6kl_hif_disable_intrs(dev);648 649	/* unmask the host controller interrupts */650	ath6kl_hif_irq_enable(dev->ar);651	status = ath6kl_hif_enable_intrs(dev);652 653	return status;654}655 656/* disable all device interrupts */657int ath6kl_hif_mask_intrs(struct ath6kl_device *dev)658{659	/*660	 * Mask the interrupt at the HIF layer to avoid any stray interrupt661	 * taken while we zero out our shadow registers in662	 * ath6kl_hif_disable_intrs().663	 */664	ath6kl_hif_irq_disable(dev->ar);665 666	return ath6kl_hif_disable_intrs(dev);667}668 669int ath6kl_hif_setup(struct ath6kl_device *dev)670{671	int status = 0;672 673	spin_lock_init(&dev->lock);674 675	/*676	 * NOTE: we actually get the block size of a mailbox other than 0,677	 * for SDIO the block size on mailbox 0 is artificially set to 1.678	 * So we use the block size that is set for the other 3 mailboxes.679	 */680	dev->htc_cnxt->block_sz = dev->ar->mbox_info.block_size;681 682	/* must be a power of 2 */683	if ((dev->htc_cnxt->block_sz & (dev->htc_cnxt->block_sz - 1)) != 0) {684		WARN_ON(1);685		status = -EINVAL;686		goto fail_setup;687	}688 689	/* assemble mask, used for padding to a block */690	dev->htc_cnxt->block_mask = dev->htc_cnxt->block_sz - 1;691 692	ath6kl_dbg(ATH6KL_DBG_HIF, "hif block size %d mbox addr 0x%x\n",693		   dev->htc_cnxt->block_sz, dev->ar->mbox_info.htc_addr);694 695	status = ath6kl_hif_disable_intrs(dev);696 697fail_setup:698	return status;699}700