1 files changed, 0 insertions, 289 deletions
diff --git a/sound/hda/hdac_bus.c b/sound/hda/hdac_bus.c
deleted file mode 100644
index d497414a5538..000000000000
--- a/sound/hda/hdac_bus.c
+++ /dev/null
@@ -1,289 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0-only
-/*
- * HD-audio core bus driver
- */
-
-#include <linux/init.h>
-#include <linux/io.h>
-#include <linux/device.h>
-#include <linux/module.h>
-#include <linux/export.h>
-#include <sound/hdaudio.h>
-#include "local.h"
-#include "trace.h"
-
-static void snd_hdac_bus_process_unsol_events(struct work_struct *work);
-
-static const struct hdac_bus_ops default_ops = {
-	.command = snd_hdac_bus_send_cmd,
-	.get_response = snd_hdac_bus_get_response,
-	.link_power = snd_hdac_bus_link_power,
-};
-
-/**
- * snd_hdac_bus_init - initialize a HD-audio bas bus
- * @bus: the pointer to bus object
- * @dev: device pointer
- * @ops: bus verb operators
- *
- * Returns 0 if successful, or a negative error code.
- */
-int snd_hdac_bus_init(struct hdac_bus *bus, struct device *dev,
-		      const struct hdac_bus_ops *ops)
-{
-	memset(bus, 0, sizeof(*bus));
-	bus->dev = dev;
-	if (ops)
-		bus->ops = ops;
-	else
-		bus->ops = &default_ops;
-	bus->dma_type = SNDRV_DMA_TYPE_DEV;
-	INIT_LIST_HEAD(&bus->stream_list);
-	INIT_LIST_HEAD(&bus->codec_list);
-	INIT_WORK(&bus->unsol_work, snd_hdac_bus_process_unsol_events);
-	spin_lock_init(&bus->reg_lock);
-	mutex_init(&bus->cmd_mutex);
-	mutex_init(&bus->lock);
-	INIT_LIST_HEAD(&bus->hlink_list);
-	init_waitqueue_head(&bus->rirb_wq);
-	bus->irq = -1;
-
-	/*
-	 * Default value of '8' is as per the HD audio specification (Rev 1.0a).
-	 * Following relation is used to derive STRIPE control value.
-	 *  For sample rate <= 48K:
-	 *   { ((num_channels * bits_per_sample) / number of SDOs) >= 8 }
-	 *  For sample rate > 48K:
-	 *   { ((num_channels * bits_per_sample * rate/48000) /
-	 *	number of SDOs) >= 8 }
-	 */
-	bus->sdo_limit = 8;
-
-	return 0;
-}
-EXPORT_SYMBOL_GPL(snd_hdac_bus_init);
-
-/**
- * snd_hdac_bus_exit - clean up a HD-audio bas bus
- * @bus: the pointer to bus object
- */
-void snd_hdac_bus_exit(struct hdac_bus *bus)
-{
-	WARN_ON(!list_empty(&bus->stream_list));
-	WARN_ON(!list_empty(&bus->codec_list));
-	cancel_work_sync(&bus->unsol_work);
-}
-EXPORT_SYMBOL_GPL(snd_hdac_bus_exit);
-
-/**
- * snd_hdac_bus_exec_verb - execute a HD-audio verb on the given bus
- * @bus: bus object
- * @addr: the HDAC device address
- * @cmd: HD-audio encoded verb
- * @res: pointer to store the response, NULL if performing asynchronously
- *
- * Returns 0 if successful, or a negative error code.
- */
-int snd_hdac_bus_exec_verb(struct hdac_bus *bus, unsigned int addr,
-			   unsigned int cmd, unsigned int *res)
-{
-	int err;
-
-	mutex_lock(&bus->cmd_mutex);
-	err = snd_hdac_bus_exec_verb_unlocked(bus, addr, cmd, res);
-	mutex_unlock(&bus->cmd_mutex);
-	return err;
-}
-
-/**
- * snd_hdac_bus_exec_verb_unlocked - unlocked version
- * @bus: bus object
- * @addr: the HDAC device address
- * @cmd: HD-audio encoded verb
- * @res: pointer to store the response, NULL if performing asynchronously
- *
- * Returns 0 if successful, or a negative error code.
- */
-int snd_hdac_bus_exec_verb_unlocked(struct hdac_bus *bus, unsigned int addr,
-				    unsigned int cmd, unsigned int *res)
-{
-	unsigned int tmp;
-	int err;
-
-	if (cmd == ~0)
-		return -EINVAL;
-
-	if (res)
-		*res = -1;
-	else if (bus->sync_write)
-		res = &tmp;
-	for (;;) {
-		trace_hda_send_cmd(bus, cmd);
-		err = bus->ops->command(bus, cmd);
-		if (err != -EAGAIN)
-			break;
-		/* process pending verbs */
-		err = bus->ops->get_response(bus, addr, &tmp);
-		if (err)
-			break;
-	}
-	if (!err && res) {
-		err = bus->ops->get_response(bus, addr, res);
-		trace_hda_get_response(bus, addr, *res);
-	}
-	return err;
-}
-EXPORT_SYMBOL_GPL(snd_hdac_bus_exec_verb_unlocked);
-
-/**
- * snd_hdac_bus_queue_event - add an unsolicited event to queue
- * @bus: the BUS
- * @res: unsolicited event (lower 32bit of RIRB entry)
- * @res_ex: codec addr and flags (upper 32bit or RIRB entry)
- *
- * Adds the given event to the queue.  The events are processed in
- * the workqueue asynchronously.  Call this function in the interrupt
- * hanlder when RIRB receives an unsolicited event.
- */
-void snd_hdac_bus_queue_event(struct hdac_bus *bus, u32 res, u32 res_ex)
-{
-	unsigned int wp;
-
-	if (!bus)
-		return;
-
-	trace_hda_unsol_event(bus, res, res_ex);
-	wp = (bus->unsol_wp + 1) % HDA_UNSOL_QUEUE_SIZE;
-	bus->unsol_wp = wp;
-
-	wp <<= 1;
-	bus->unsol_queue[wp] = res;
-	bus->unsol_queue[wp + 1] = res_ex;
-
-	schedule_work(&bus->unsol_work);
-}
-
-/*
- * process queued unsolicited events
- */
-static void snd_hdac_bus_process_unsol_events(struct work_struct *work)
-{
-	struct hdac_bus *bus = container_of(work, struct hdac_bus, unsol_work);
-	struct hdac_device *codec;
-	struct hdac_driver *drv;
-	unsigned int rp, caddr, res;
-
-	spin_lock_irq(&bus->reg_lock);
-	while (bus->unsol_rp != bus->unsol_wp) {
-		rp = (bus->unsol_rp + 1) % HDA_UNSOL_QUEUE_SIZE;
-		bus->unsol_rp = rp;
-		rp <<= 1;
-		res = bus->unsol_queue[rp];
-		caddr = bus->unsol_queue[rp + 1];
-		if (!(caddr & (1 << 4))) /* no unsolicited event? */
-			continue;
-		codec = bus->caddr_tbl[caddr & 0x0f];
-		if (!codec || !codec->registered)
-			continue;
-		spin_unlock_irq(&bus->reg_lock);
-		drv = drv_to_hdac_driver(codec->dev.driver);
-		if (drv->unsol_event)
-			drv->unsol_event(codec, res);
-		spin_lock_irq(&bus->reg_lock);
-	}
-	spin_unlock_irq(&bus->reg_lock);
-}
-
-/**
- * snd_hdac_bus_add_device - Add a codec to bus
- * @bus: HDA core bus
- * @codec: HDA core device to add
- *
- * Adds the given codec to the list in the bus.  The caddr_tbl array
- * and codec_powered bits are updated, as well.
- * Returns zero if success, or a negative error code.
- */
-int snd_hdac_bus_add_device(struct hdac_bus *bus, struct hdac_device *codec)
-{
-	if (bus->caddr_tbl[codec->addr]) {
-		dev_err(bus->dev, "address 0x%x is already occupied\n",
-			codec->addr);
-		return -EBUSY;
-	}
-
-	list_add_tail(&codec->list, &bus->codec_list);
-	bus->caddr_tbl[codec->addr] = codec;
-	set_bit(codec->addr, &bus->codec_powered);
-	bus->num_codecs++;
-	return 0;
-}
-
-/**
- * snd_hdac_bus_remove_device - Remove a codec from bus
- * @bus: HDA core bus
- * @codec: HDA core device to remove
- */
-void snd_hdac_bus_remove_device(struct hdac_bus *bus,
-				struct hdac_device *codec)
-{
-	WARN_ON(bus != codec->bus);
-	if (list_empty(&codec->list))
-		return;
-	list_del_init(&codec->list);
-	bus->caddr_tbl[codec->addr] = NULL;
-	clear_bit(codec->addr, &bus->codec_powered);
-	bus->num_codecs--;
-	flush_work(&bus->unsol_work);
-}
-
-#ifdef CONFIG_SND_HDA_ALIGNED_MMIO
-/* Helpers for aligned read/write of mmio space, for Tegra */
-unsigned int snd_hdac_aligned_read(void __iomem *addr, unsigned int mask)
-{
-	void __iomem *aligned_addr =
-		(void __iomem *)((unsigned long)(addr) & ~0x3);
-	unsigned int shift = ((unsigned long)(addr) & 0x3) << 3;
-	unsigned int v;
-
-	v = readl(aligned_addr);
-	return (v >> shift) & mask;
-}
-EXPORT_SYMBOL_GPL(snd_hdac_aligned_read);
-
-void snd_hdac_aligned_write(unsigned int val, void __iomem *addr,
-			    unsigned int mask)
-{
-	void __iomem *aligned_addr =
-		(void __iomem *)((unsigned long)(addr) & ~0x3);
-	unsigned int shift = ((unsigned long)(addr) & 0x3) << 3;
-	unsigned int v;
-
-	v = readl(aligned_addr);
-	v &= ~(mask << shift);
-	v |= val << shift;
-	writel(v, aligned_addr);
-}
-EXPORT_SYMBOL_GPL(snd_hdac_aligned_write);
-#endif /* CONFIG_SND_HDA_ALIGNED_MMIO */
-
-void snd_hdac_codec_link_up(struct hdac_device *codec)
-{
-	struct hdac_bus *bus = codec->bus;
-
-	if (bus->ops->link_power)
-		bus->ops->link_power(codec, true);
-	else
-		snd_hdac_bus_link_power(codec, true);
-}
-EXPORT_SYMBOL_GPL(snd_hdac_codec_link_up);
-
-void snd_hdac_codec_link_down(struct hdac_device *codec)
-{
-	struct hdac_bus *bus = codec->bus;
-
-	if (bus->ops->link_power)
-		bus->ops->link_power(codec, false);
-	else
-		snd_hdac_bus_link_power(codec, false);
-}
-EXPORT_SYMBOL_GPL(snd_hdac_codec_link_down);