1 files changed, 0 insertions, 778 deletions

diff --git a/sound/hda/hdac_controller.c b/sound/hda/hdac_controller.c
deleted file mode 100644
index b5c833b9f8b9..000000000000
--- a/sound/hda/hdac_controller.c
+++ /dev/null
@@ -1,778 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0-only
-/*
- * HD-audio controller helpers
- */
-
-#include <linux/kernel.h>
-#include <linux/delay.h>
-#include <linux/export.h>
-#include <sound/core.h>
-#include <sound/hdaudio.h>
-#include <sound/hda_register.h>
-#include "local.h"
-
-/* clear CORB read pointer properly */
-static void azx_clear_corbrp(struct hdac_bus *bus)
-{
-	int timeout;
-
-	for (timeout = 1000; timeout > 0; timeout--) {
-		if (snd_hdac_chip_readw(bus, CORBRP) & AZX_CORBRP_RST)
-			break;
-		udelay(1);
-	}
-	if (timeout <= 0)
-		dev_err(bus->dev, "CORB reset timeout#1, CORBRP = %d\n",
-			snd_hdac_chip_readw(bus, CORBRP));
-
-	snd_hdac_chip_writew(bus, CORBRP, 0);
-	for (timeout = 1000; timeout > 0; timeout--) {
-		if (snd_hdac_chip_readw(bus, CORBRP) == 0)
-			break;
-		udelay(1);
-	}
-	if (timeout <= 0)
-		dev_err(bus->dev, "CORB reset timeout#2, CORBRP = %d\n",
-			snd_hdac_chip_readw(bus, CORBRP));
-}
-
-/**
- * snd_hdac_bus_init_cmd_io - set up CORB/RIRB buffers
- * @bus: HD-audio core bus
- */
-void snd_hdac_bus_init_cmd_io(struct hdac_bus *bus)
-{
-	WARN_ON_ONCE(!bus->rb.area);
-
-	spin_lock_irq(&bus->reg_lock);
-	/* CORB set up */
-	bus->corb.addr = bus->rb.addr;
-	bus->corb.buf = (__le32 *)bus->rb.area;
-	snd_hdac_chip_writel(bus, CORBLBASE, (u32)bus->corb.addr);
-	snd_hdac_chip_writel(bus, CORBUBASE, upper_32_bits(bus->corb.addr));
-
-	/* set the corb size to 256 entries (ULI requires explicitly) */
-	snd_hdac_chip_writeb(bus, CORBSIZE, 0x02);
-	/* set the corb write pointer to 0 */
-	snd_hdac_chip_writew(bus, CORBWP, 0);
-
-	/* reset the corb hw read pointer */
-	snd_hdac_chip_writew(bus, CORBRP, AZX_CORBRP_RST);
-	if (!bus->corbrp_self_clear)
-		azx_clear_corbrp(bus);
-
-	/* enable corb dma */
-	if (!bus->use_pio_for_commands)
-		snd_hdac_chip_writeb(bus, CORBCTL, AZX_CORBCTL_RUN);
-
-	/* RIRB set up */
-	bus->rirb.addr = bus->rb.addr + 2048;
-	bus->rirb.buf = (__le32 *)(bus->rb.area + 2048);
-	bus->rirb.wp = bus->rirb.rp = 0;
-	memset(bus->rirb.cmds, 0, sizeof(bus->rirb.cmds));
-	snd_hdac_chip_writel(bus, RIRBLBASE, (u32)bus->rirb.addr);
-	snd_hdac_chip_writel(bus, RIRBUBASE, upper_32_bits(bus->rirb.addr));
-
-	/* set the rirb size to 256 entries (ULI requires explicitly) */
-	snd_hdac_chip_writeb(bus, RIRBSIZE, 0x02);
-	/* reset the rirb hw write pointer */
-	snd_hdac_chip_writew(bus, RIRBWP, AZX_RIRBWP_RST);
-	/* set N=1, get RIRB response interrupt for new entry */
-	snd_hdac_chip_writew(bus, RINTCNT, 1);
-	/* enable rirb dma and response irq */
-	if (bus->not_use_interrupts)
-		snd_hdac_chip_writeb(bus, RIRBCTL, AZX_RBCTL_DMA_EN);
-	else
-		snd_hdac_chip_writeb(bus, RIRBCTL, AZX_RBCTL_DMA_EN | AZX_RBCTL_IRQ_EN);
-	/* Accept unsolicited responses */
-	snd_hdac_chip_updatel(bus, GCTL, AZX_GCTL_UNSOL, AZX_GCTL_UNSOL);
-	spin_unlock_irq(&bus->reg_lock);
-}
-EXPORT_SYMBOL_GPL(snd_hdac_bus_init_cmd_io);
-
-/* wait for cmd dmas till they are stopped */
-static void hdac_wait_for_cmd_dmas(struct hdac_bus *bus)
-{
-	unsigned long timeout;
-
-	timeout = jiffies + msecs_to_jiffies(100);
-	while ((snd_hdac_chip_readb(bus, RIRBCTL) & AZX_RBCTL_DMA_EN)
-		&& time_before(jiffies, timeout))
-		udelay(10);
-
-	timeout = jiffies + msecs_to_jiffies(100);
-	while ((snd_hdac_chip_readb(bus, CORBCTL) & AZX_CORBCTL_RUN)
-		&& time_before(jiffies, timeout))
-		udelay(10);
-}
-
-/**
- * snd_hdac_bus_stop_cmd_io - clean up CORB/RIRB buffers
- * @bus: HD-audio core bus
- */
-void snd_hdac_bus_stop_cmd_io(struct hdac_bus *bus)
-{
-	spin_lock_irq(&bus->reg_lock);
-	/* disable ringbuffer DMAs */
-	snd_hdac_chip_writeb(bus, RIRBCTL, 0);
-	snd_hdac_chip_writeb(bus, CORBCTL, 0);
-	spin_unlock_irq(&bus->reg_lock);
-
-	hdac_wait_for_cmd_dmas(bus);
-
-	spin_lock_irq(&bus->reg_lock);
-	/* disable unsolicited responses */
-	snd_hdac_chip_updatel(bus, GCTL, AZX_GCTL_UNSOL, 0);
-	spin_unlock_irq(&bus->reg_lock);
-}
-EXPORT_SYMBOL_GPL(snd_hdac_bus_stop_cmd_io);
-
-static unsigned int azx_command_addr(u32 cmd)
-{
-	unsigned int addr = cmd >> 28;
-
-	if (snd_BUG_ON(addr >= HDA_MAX_CODECS))
-		addr = 0;
-	return addr;
-}
-
-/* receive an Immediate Response with PIO */
-static int snd_hdac_bus_wait_for_pio_response(struct hdac_bus *bus,
-					      unsigned int addr)
-{
-	int timeout = 50;
-
-	while (timeout--) {
-		/* check IRV bit */
-		if (snd_hdac_chip_readw(bus, IRS) & AZX_IRS_VALID) {
-			/* reuse rirb.res as the response return value */
-			bus->rirb.res[addr] = snd_hdac_chip_readl(bus, IR);
-			return 0;
-		}
-		udelay(1);
-	}
-
-	dev_dbg_ratelimited(bus->dev, "get_response_pio timeout: IRS=%#x\n",
-			    snd_hdac_chip_readw(bus, IRS));
-
-	bus->rirb.res[addr] = -1;
-
-	return -EIO;
-}
-
-/**
- * snd_hdac_bus_send_cmd_pio - send a command verb via Immediate Command
- * @bus: HD-audio core bus
- * @val: encoded verb value to send
- *
- * Returns zero for success or a negative error code.
- */
-static int snd_hdac_bus_send_cmd_pio(struct hdac_bus *bus, unsigned int val)
-{
-	unsigned int addr = azx_command_addr(val);
-	int timeout = 50;
-	int ret = -EIO;
-
-	spin_lock_irq(&bus->reg_lock);
-
-	while (timeout--) {
-		/* check ICB bit */
-		if (!((snd_hdac_chip_readw(bus, IRS) & AZX_IRS_BUSY))) {
-			/* Clear IRV bit */
-			snd_hdac_chip_updatew(bus, IRS, AZX_IRS_VALID, AZX_IRS_VALID);
-			snd_hdac_chip_writel(bus, IC, val);
-			/* Set ICB bit */
-			snd_hdac_chip_updatew(bus, IRS, AZX_IRS_BUSY, AZX_IRS_BUSY);
-
-			ret = snd_hdac_bus_wait_for_pio_response(bus, addr);
-			goto out;
-		}
-		udelay(1);
-	}
-
-	dev_dbg_ratelimited(bus->dev, "send_cmd_pio timeout: IRS=%#x, val=%#x\n",
-			    snd_hdac_chip_readw(bus, IRS), val);
-
-out:
-	spin_unlock_irq(&bus->reg_lock);
-
-	return ret;
-}
-
-/**
- * snd_hdac_bus_get_response_pio - receive a response via Immediate Response
- * @bus: HD-audio core bus
- * @addr: codec address
- * @res: pointer to store the value, NULL when not needed
- *
- * Returns zero if a value is read, or a negative error code.
- */
-static int snd_hdac_bus_get_response_pio(struct hdac_bus *bus,
-					 unsigned int addr, unsigned int *res)
-{
-	if (res)
-		*res = bus->rirb.res[addr];
-
-	return 0;
-}
-
-/**
- * snd_hdac_bus_send_cmd_corb - send a command verb via CORB
- * @bus: HD-audio core bus
- * @val: encoded verb value to send
- *
- * Returns zero for success or a negative error code.
- */
-static int snd_hdac_bus_send_cmd_corb(struct hdac_bus *bus, unsigned int val)
-{
-	unsigned int addr = azx_command_addr(val);
-	unsigned int wp, rp;
-
-	spin_lock_irq(&bus->reg_lock);
-
-	bus->last_cmd[azx_command_addr(val)] = val;
-
-	/* add command to corb */
-	wp = snd_hdac_chip_readw(bus, CORBWP);
-	if (wp == 0xffff) {
-		/* something wrong, controller likely turned to D3 */
-		spin_unlock_irq(&bus->reg_lock);
-		return -EIO;
-	}
-	wp++;
-	wp %= AZX_MAX_CORB_ENTRIES;
-
-	rp = snd_hdac_chip_readw(bus, CORBRP);
-	if (wp == rp) {
-		/* oops, it's full */
-		spin_unlock_irq(&bus->reg_lock);
-		return -EAGAIN;
-	}
-
-	bus->rirb.cmds[addr]++;
-	bus->corb.buf[wp] = cpu_to_le32(val);
-	snd_hdac_chip_writew(bus, CORBWP, wp);
-
-	spin_unlock_irq(&bus->reg_lock);
-
-	return 0;
-}
-
-#define AZX_RIRB_EX_UNSOL_EV	(1<<4)
-
-/**
- * snd_hdac_bus_update_rirb - retrieve RIRB entries
- * @bus: HD-audio core bus
- *
- * Usually called from interrupt handler.
- * The caller needs bus->reg_lock spinlock before calling this.
- */
-void snd_hdac_bus_update_rirb(struct hdac_bus *bus)
-{
-	unsigned int rp, wp;
-	unsigned int addr;
-	u32 res, res_ex;
-
-	wp = snd_hdac_chip_readw(bus, RIRBWP);
-	if (wp == 0xffff) {
-		/* something wrong, controller likely turned to D3 */
-		return;
-	}
-
-	if (wp == bus->rirb.wp)
-		return;
-	bus->rirb.wp = wp;
-
-	while (bus->rirb.rp != wp) {
-		bus->rirb.rp++;
-		bus->rirb.rp %= AZX_MAX_RIRB_ENTRIES;
-
-		rp = bus->rirb.rp << 1; /* an RIRB entry is 8-bytes */
-		res_ex = le32_to_cpu(bus->rirb.buf[rp + 1]);
-		res = le32_to_cpu(bus->rirb.buf[rp]);
-		addr = res_ex & 0xf;
-		if (addr >= HDA_MAX_CODECS) {
-			dev_err(bus->dev,
-				"spurious response %#x:%#x, rp = %d, wp = %d",
-				res, res_ex, bus->rirb.rp, wp);
-			snd_BUG();
-		} else if (res_ex & AZX_RIRB_EX_UNSOL_EV)
-			snd_hdac_bus_queue_event(bus, res, res_ex);
-		else if (bus->rirb.cmds[addr]) {
-			bus->rirb.res[addr] = res;
-			bus->rirb.cmds[addr]--;
-			if (!bus->rirb.cmds[addr] &&
-			    waitqueue_active(&bus->rirb_wq))
-				wake_up(&bus->rirb_wq);
-		} else {
-			dev_err_ratelimited(bus->dev,
-				"spurious response %#x:%#x, last cmd=%#08x\n",
-				res, res_ex, bus->last_cmd[addr]);
-		}
-	}
-}
-EXPORT_SYMBOL_GPL(snd_hdac_bus_update_rirb);
-
-/**
- * snd_hdac_bus_get_response_rirb - receive a response via RIRB
- * @bus: HD-audio core bus
- * @addr: codec address
- * @res: pointer to store the value, NULL when not needed
- *
- * Returns zero if a value is read, or a negative error code.
- */
-static int snd_hdac_bus_get_response_rirb(struct hdac_bus *bus,
-					  unsigned int addr, unsigned int *res)
-{
-	unsigned long timeout;
-	unsigned long loopcounter;
-	wait_queue_entry_t wait;
-	bool warned = false;
-
-	init_wait_entry(&wait, 0);
-	timeout = jiffies + msecs_to_jiffies(1000);
-
-	for (loopcounter = 0;; loopcounter++) {
-		spin_lock_irq(&bus->reg_lock);
-		if (!bus->polling_mode)
-			prepare_to_wait(&bus->rirb_wq, &wait,
-					TASK_UNINTERRUPTIBLE);
-		if (bus->polling_mode)
-			snd_hdac_bus_update_rirb(bus);
-		if (!bus->rirb.cmds[addr]) {
-			if (res)
-				*res = bus->rirb.res[addr]; /* the last value */
-			if (!bus->polling_mode)
-				finish_wait(&bus->rirb_wq, &wait);
-			spin_unlock_irq(&bus->reg_lock);
-			return 0;
-		}
-		spin_unlock_irq(&bus->reg_lock);
-		if (time_after(jiffies, timeout))
-			break;
-#define LOOP_COUNT_MAX	3000
-		if (!bus->polling_mode) {
-			schedule_timeout(msecs_to_jiffies(2));
-		} else if (bus->needs_damn_long_delay ||
-			   loopcounter > LOOP_COUNT_MAX) {
-			if (loopcounter > LOOP_COUNT_MAX && !warned) {
-				dev_dbg_ratelimited(bus->dev,
-						    "too slow response, last cmd=%#08x\n",
-						    bus->last_cmd[addr]);
-				warned = true;
-			}
-			msleep(2); /* temporary workaround */
-		} else {
-			udelay(10);
-			cond_resched();
-		}
-	}
-
-	if (!bus->polling_mode)
-		finish_wait(&bus->rirb_wq, &wait);
-
-	return -EIO;
-}
-
-/**
- * snd_hdac_bus_send_cmd - send a command verb via CORB or PIO
- * @bus: HD-audio core bus
- * @val: encoded verb value to send
- *
- * Returns zero for success or a negative error code.
- */
-int snd_hdac_bus_send_cmd(struct hdac_bus *bus, unsigned int val)
-{
-	if (bus->use_pio_for_commands)
-		return snd_hdac_bus_send_cmd_pio(bus, val);
-
-	return snd_hdac_bus_send_cmd_corb(bus, val);
-}
-EXPORT_SYMBOL_GPL(snd_hdac_bus_send_cmd);
-
-/**
- * snd_hdac_bus_get_response - receive a response via RIRB or PIO
- * @bus: HD-audio core bus
- * @addr: codec address
- * @res: pointer to store the value, NULL when not needed
- *
- * Returns zero if a value is read, or a negative error code.
- */
-int snd_hdac_bus_get_response(struct hdac_bus *bus, unsigned int addr,
-			      unsigned int *res)
-{
-	if (bus->use_pio_for_commands)
-		return snd_hdac_bus_get_response_pio(bus, addr, res);
-
-	return snd_hdac_bus_get_response_rirb(bus, addr, res);
-}
-EXPORT_SYMBOL_GPL(snd_hdac_bus_get_response);
-
-#define HDAC_MAX_CAPS 10
-/**
- * snd_hdac_bus_parse_capabilities - parse capability structure
- * @bus: the pointer to bus object
- *
- * Returns 0 if successful, or a negative error code.
- */
-int snd_hdac_bus_parse_capabilities(struct hdac_bus *bus)
-{
-	unsigned int cur_cap;
-	unsigned int offset;
-	unsigned int counter = 0;
-
-	offset = snd_hdac_chip_readw(bus, LLCH);
-
-	/* Lets walk the linked capabilities list */
-	do {
-		cur_cap = _snd_hdac_chip_readl(bus, offset);
-
-		dev_dbg(bus->dev, "Capability version: 0x%x\n",
-			(cur_cap & AZX_CAP_HDR_VER_MASK) >> AZX_CAP_HDR_VER_OFF);
-
-		dev_dbg(bus->dev, "HDA capability ID: 0x%x\n",
-			(cur_cap & AZX_CAP_HDR_ID_MASK) >> AZX_CAP_HDR_ID_OFF);
-
-		if (cur_cap == -1) {
-			dev_dbg(bus->dev, "Invalid capability reg read\n");
-			break;
-		}
-
-		switch ((cur_cap & AZX_CAP_HDR_ID_MASK) >> AZX_CAP_HDR_ID_OFF) {
-		case AZX_ML_CAP_ID:
-			dev_dbg(bus->dev, "Found ML capability\n");
-			bus->mlcap = bus->remap_addr + offset;
-			break;
-
-		case AZX_GTS_CAP_ID:
-			dev_dbg(bus->dev, "Found GTS capability offset=%x\n", offset);
-			bus->gtscap = bus->remap_addr + offset;
-			break;
-
-		case AZX_PP_CAP_ID:
-			/* PP capability found, the Audio DSP is present */
-			dev_dbg(bus->dev, "Found PP capability offset=%x\n", offset);
-			bus->ppcap = bus->remap_addr + offset;
-			break;
-
-		case AZX_SPB_CAP_ID:
-			/* SPIB capability found, handler function */
-			dev_dbg(bus->dev, "Found SPB capability\n");
-			bus->spbcap = bus->remap_addr + offset;
-			break;
-
-		case AZX_DRSM_CAP_ID:
-			/* DMA resume  capability found, handler function */
-			dev_dbg(bus->dev, "Found DRSM capability\n");
-			bus->drsmcap = bus->remap_addr + offset;
-			break;
-
-		default:
-			dev_err(bus->dev, "Unknown capability %d\n", cur_cap);
-			cur_cap = 0;
-			break;
-		}
-
-		counter++;
-
-		if (counter > HDAC_MAX_CAPS) {
-			dev_err(bus->dev, "We exceeded HDAC capabilities!!!\n");
-			break;
-		}
-
-		/* read the offset of next capability */
-		offset = cur_cap & AZX_CAP_HDR_NXT_PTR_MASK;
-
-	} while (offset);
-
-	return 0;
-}
-EXPORT_SYMBOL_GPL(snd_hdac_bus_parse_capabilities);
-
-/*
- * Lowlevel interface
- */
-
-/**
- * snd_hdac_bus_enter_link_reset - enter link reset
- * @bus: HD-audio core bus
- *
- * Enter to the link reset state.
- */
-void snd_hdac_bus_enter_link_reset(struct hdac_bus *bus)
-{
-	unsigned long timeout;
-
-	/* reset controller */
-	snd_hdac_chip_updatel(bus, GCTL, AZX_GCTL_RESET, 0);
-
-	timeout = jiffies + msecs_to_jiffies(100);
-	while ((snd_hdac_chip_readb(bus, GCTL) & AZX_GCTL_RESET) &&
-	       time_before(jiffies, timeout))
-		usleep_range(500, 1000);
-}
-EXPORT_SYMBOL_GPL(snd_hdac_bus_enter_link_reset);
-
-/**
- * snd_hdac_bus_exit_link_reset - exit link reset
- * @bus: HD-audio core bus
- *
- * Exit from the link reset state.
- */
-void snd_hdac_bus_exit_link_reset(struct hdac_bus *bus)
-{
-	unsigned long timeout;
-
-	snd_hdac_chip_updateb(bus, GCTL, AZX_GCTL_RESET, AZX_GCTL_RESET);
-
-	timeout = jiffies + msecs_to_jiffies(100);
-	while (!snd_hdac_chip_readb(bus, GCTL) && time_before(jiffies, timeout))
-		usleep_range(500, 1000);
-}
-EXPORT_SYMBOL_GPL(snd_hdac_bus_exit_link_reset);
-
-/* reset codec link */
-int snd_hdac_bus_reset_link(struct hdac_bus *bus, bool full_reset)
-{
-	if (!full_reset)
-		goto skip_reset;
-
-	/* clear STATESTS if not in reset */
-	if (snd_hdac_chip_readb(bus, GCTL) & AZX_GCTL_RESET)
-		snd_hdac_chip_writew(bus, STATESTS, STATESTS_INT_MASK);
-
-	/* reset controller */
-	snd_hdac_bus_enter_link_reset(bus);
-
-	/* delay for >= 100us for codec PLL to settle per spec
-	 * Rev 0.9 section 5.5.1
-	 */
-	usleep_range(500, 1000);
-
-	/* Bring controller out of reset */
-	snd_hdac_bus_exit_link_reset(bus);
-
-	/* Brent Chartrand said to wait >= 540us for codecs to initialize */
-	usleep_range(1000, 1200);
-
- skip_reset:
-	/* check to see if controller is ready */
-	if (!snd_hdac_chip_readb(bus, GCTL)) {
-		dev_dbg(bus->dev, "controller not ready!\n");
-		return -EBUSY;
-	}
-
-	/* detect codecs */
-	if (!bus->codec_mask) {
-		bus->codec_mask = snd_hdac_chip_readw(bus, STATESTS);
-		dev_dbg(bus->dev, "codec_mask = 0x%lx\n", bus->codec_mask);
-	}
-
-	return 0;
-}
-EXPORT_SYMBOL_GPL(snd_hdac_bus_reset_link);
-
-/* enable interrupts */
-static void azx_int_enable(struct hdac_bus *bus)
-{
-	/* enable controller CIE and GIE */
-	snd_hdac_chip_updatel(bus, INTCTL,
-			      AZX_INT_CTRL_EN | AZX_INT_GLOBAL_EN,
-			      AZX_INT_CTRL_EN | AZX_INT_GLOBAL_EN);
-}
-
-/* disable interrupts */
-static void azx_int_disable(struct hdac_bus *bus)
-{
-	struct hdac_stream *azx_dev;
-
-	/* disable interrupts in stream descriptor */
-	list_for_each_entry(azx_dev, &bus->stream_list, list)
-		snd_hdac_stream_updateb(azx_dev, SD_CTL, SD_INT_MASK, 0);
-
-	/* disable SIE for all streams & disable controller CIE and GIE */
-	snd_hdac_chip_writel(bus, INTCTL, 0);
-}
-
-/* clear interrupts */
-static void azx_int_clear(struct hdac_bus *bus)
-{
-	struct hdac_stream *azx_dev;
-
-	/* clear stream status */
-	list_for_each_entry(azx_dev, &bus->stream_list, list)
-		snd_hdac_stream_writeb(azx_dev, SD_STS, SD_INT_MASK);
-
-	/* clear STATESTS */
-	snd_hdac_chip_writew(bus, STATESTS, STATESTS_INT_MASK);
-
-	/* clear rirb status */
-	snd_hdac_chip_writeb(bus, RIRBSTS, RIRB_INT_MASK);
-
-	/* clear int status */
-	snd_hdac_chip_writel(bus, INTSTS, AZX_INT_CTRL_EN | AZX_INT_ALL_STREAM);
-}
-
-/**
- * snd_hdac_bus_init_chip - reset and start the controller registers
- * @bus: HD-audio core bus
- * @full_reset: Do full reset
- */
-bool snd_hdac_bus_init_chip(struct hdac_bus *bus, bool full_reset)
-{
-	if (bus->chip_init)
-		return false;
-
-	/* reset controller */
-	snd_hdac_bus_reset_link(bus, full_reset);
-
-	/* clear interrupts */
-	azx_int_clear(bus);
-
-	/* initialize the codec command I/O */
-	snd_hdac_bus_init_cmd_io(bus);
-
-	/* enable interrupts after CORB/RIRB buffers are initialized above */
-	azx_int_enable(bus);
-
-	/* program the position buffer */
-	if (bus->use_posbuf && bus->posbuf.addr) {
-		snd_hdac_chip_writel(bus, DPLBASE, (u32)bus->posbuf.addr);
-		snd_hdac_chip_writel(bus, DPUBASE, upper_32_bits(bus->posbuf.addr));
-	}
-
-	bus->chip_init = true;
-
-	return true;
-}
-EXPORT_SYMBOL_GPL(snd_hdac_bus_init_chip);
-
-/**
- * snd_hdac_bus_stop_chip - disable the whole IRQ and I/Os
- * @bus: HD-audio core bus
- */
-void snd_hdac_bus_stop_chip(struct hdac_bus *bus)
-{
-	if (!bus->chip_init)
-		return;
-
-	/* disable interrupts */
-	azx_int_disable(bus);
-	azx_int_clear(bus);
-
-	/* disable CORB/RIRB */
-	snd_hdac_bus_stop_cmd_io(bus);
-
-	/* disable position buffer */
-	if (bus->posbuf.addr) {
-		snd_hdac_chip_writel(bus, DPLBASE, 0);
-		snd_hdac_chip_writel(bus, DPUBASE, 0);
-	}
-
-	bus->chip_init = false;
-}
-EXPORT_SYMBOL_GPL(snd_hdac_bus_stop_chip);
-
-/**
- * snd_hdac_bus_handle_stream_irq - interrupt handler for streams
- * @bus: HD-audio core bus
- * @status: INTSTS register value
- * @ack: callback to be called for woken streams
- *
- * Returns the bits of handled streams, or zero if no stream is handled.
- */
-int snd_hdac_bus_handle_stream_irq(struct hdac_bus *bus, unsigned int status,
-				    void (*ack)(struct hdac_bus *,
-						struct hdac_stream *))
-{
-	struct hdac_stream *azx_dev;
-	u8 sd_status;
-	int handled = 0;
-
-	list_for_each_entry(azx_dev, &bus->stream_list, list) {
-		if (status & azx_dev->sd_int_sta_mask) {
-			sd_status = snd_hdac_stream_readb(azx_dev, SD_STS);
-			snd_hdac_stream_writeb(azx_dev, SD_STS, SD_INT_MASK);
-			handled |= 1 << azx_dev->index;
-			if ((!azx_dev->substream && !azx_dev->cstream) ||
-			    !azx_dev->running || !(sd_status & SD_INT_COMPLETE))
-				continue;
-			if (ack)
-				ack(bus, azx_dev);
-		}
-	}
-	return handled;
-}
-EXPORT_SYMBOL_GPL(snd_hdac_bus_handle_stream_irq);
-
-/**
- * snd_hdac_bus_alloc_stream_pages - allocate BDL and other buffers
- * @bus: HD-audio core bus
- *
- * Call this after assigning the all streams.
- * Returns zero for success, or a negative error code.
- */
-int snd_hdac_bus_alloc_stream_pages(struct hdac_bus *bus)
-{
-	struct hdac_stream *s;
-	int num_streams = 0;
-	int dma_type = bus->dma_type ? bus->dma_type : SNDRV_DMA_TYPE_DEV;
-	int err;
-
-	list_for_each_entry(s, &bus->stream_list, list) {
-		/* allocate memory for the BDL for each stream */
-		err = snd_dma_alloc_pages(dma_type, bus->dev,
-					  BDL_SIZE, &s->bdl);
-		num_streams++;
-		if (err < 0)
-			return -ENOMEM;
-	}
-
-	if (WARN_ON(!num_streams))
-		return -EINVAL;
-	/* allocate memory for the position buffer */
-	err = snd_dma_alloc_pages(dma_type, bus->dev,
-				  num_streams * 8, &bus->posbuf);
-	if (err < 0)
-		return -ENOMEM;
-	list_for_each_entry(s, &bus->stream_list, list)
-		s->posbuf = (__le32 *)(bus->posbuf.area + s->index * 8);
-
-	/* single page (at least 4096 bytes) must suffice for both ringbuffes */
-	return snd_dma_alloc_pages(dma_type, bus->dev, PAGE_SIZE, &bus->rb);
-}
-EXPORT_SYMBOL_GPL(snd_hdac_bus_alloc_stream_pages);
-
-/**
- * snd_hdac_bus_free_stream_pages - release BDL and other buffers
- * @bus: HD-audio core bus
- */
-void snd_hdac_bus_free_stream_pages(struct hdac_bus *bus)
-{
-	struct hdac_stream *s;
-
-	list_for_each_entry(s, &bus->stream_list, list) {
-		if (s->bdl.area)
-			snd_dma_free_pages(&s->bdl);
-	}
-
-	if (bus->rb.area)
-		snd_dma_free_pages(&bus->rb);
-	if (bus->posbuf.area)
-		snd_dma_free_pages(&bus->posbuf);
-}
-EXPORT_SYMBOL_GPL(snd_hdac_bus_free_stream_pages);
-
-/**
- * snd_hdac_bus_link_power - power up/down codec link
- * @codec: HD-audio device
- * @enable: whether to power-up the link
- */
-void snd_hdac_bus_link_power(struct hdac_device *codec, bool enable)
-{
-	if (enable)
-		set_bit(codec->addr, &codec->bus->codec_powered);
-	else
-		clear_bit(codec->addr, &codec->bus->codec_powered);
-}
-EXPORT_SYMBOL_GPL(snd_hdac_bus_link_power);