sound: ac97: Remove sound driver for ancient platform

Xilinx PowerPC platforms are no longer supported and none is really testing
these platforms that's why remove them. If someone has any issue with it
these patches can be reverted.
Signed-off-by: Michal Simek <michal.simek@xilinx.com>
Acked-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/31a3b884dde2c47a30bb2b92355978b97ea70f86.1585575111.git.michal.simek@xilinx.com

sound/drivers/Kconfig

@@ -186,18 +186,6 @@ config SND_PORTMAN2X4
 	  To compile this driver as a module, choose M here: the module
 	  will be called snd-portman2x4.
 
-config SND_ML403_AC97CR
-	tristate "Xilinx ML403 AC97 Controller Reference"
-	depends on XILINX_VIRTEX
-	select SND_AC97_CODEC
-	help
-	  Say Y here to include support for the
-	  opb_ac97_controller_ref_v1_00_a ip core found in Xilinx's ML403
-	  reference design.
-
-	  To compile this driver as a module, choose M here: the module
-	  will be called snd-ml403_ac97cr.
-
 config SND_AC97_POWER_SAVE
 	bool "AC97 Power-Saving Mode"
 	depends on SND_AC97_CODEC

sound/drivers/Makefile

@@ -11,7 +11,6 @@ snd-mts64-objs := mts64.o
 snd-portman2x4-objs := portman2x4.o
 snd-serial-u16550-objs := serial-u16550.o
 snd-virmidi-objs := virmidi.o
-snd-ml403-ac97cr-objs := ml403-ac97cr.o pcm-indirect2.o
 
 # Toplevel Module Dependency
 obj-$(CONFIG_SND_DUMMY) += snd-dummy.o
@@ -21,6 +20,5 @@ obj-$(CONFIG_SND_SERIAL_U16550) += snd-serial-u16550.o
 obj-$(CONFIG_SND_MTPAV) += snd-mtpav.o
 obj-$(CONFIG_SND_MTS64) += snd-mts64.o
 obj-$(CONFIG_SND_PORTMAN2X4) += snd-portman2x4.o
-obj-$(CONFIG_SND_ML403_AC97CR) += snd-ml403-ac97cr.o
 
 obj-$(CONFIG_SND) += opl3/ opl4/ mpu401/ vx/ pcsp/

sound/drivers/pcm-indirect2.h

-/* SPDX-License-Identifier: GPL-2.0-or-later */
-/*
- * Helper functions for indirect PCM data transfer to a simple FIFO in
- * hardware (small, no possibility to read "hardware io position",
- * updating position done by interrupt, ...)
- *
- *  Copyright (c) by 2007  Joachim Foerster <JOFT@gmx.de>
- *
- *  Based on "pcm-indirect.h" (alsa-driver-1.0.13) by
- *
- *  Copyright (c) by Takashi Iwai <tiwai@suse.de>
- *                   Jaroslav Kysela <perex@suse.cz>
- */
-
-#ifndef __SOUND_PCM_INDIRECT2_H
-#define __SOUND_PCM_INDIRECT2_H
-
-/* struct snd_pcm_substream, struct snd_pcm_runtime, snd_pcm_uframes_t */
-#include <sound/pcm.h>
-
-/* Debug options for code which may be removed completely in a final version */
-#ifdef CONFIG_SND_DEBUG
-#define SND_PCM_INDIRECT2_STAT    /* turn on some "statistics" about the
-				   * process of copying bytes from the
-				   * intermediate buffer to the hardware
-				   * fifo and the other way round
-				   */
-#endif
-
-struct snd_pcm_indirect2 {
-	unsigned int hw_buffer_size;  /* Byte size of hardware buffer */
-	int hw_ready;		      /* playback: 1 = hw fifo has room left,
-				       * 0 = hw fifo is full
-				       */
-	unsigned int min_multiple;
-	int min_periods;	      /* counts number of min. periods until
-				       * min_multiple is reached
-				       */
-	int min_period_count;	      /* counts bytes to count number of
-				       * min. periods
-				       */
-
-	unsigned int sw_buffer_size;  /* Byte size of software buffer */
-
-	/* sw_data: position in intermediate buffer, where we will read (or
-	 *          write) from/to next time (to transfer data to/from HW)
-	 */
-	unsigned int sw_data;         /* Offset to next dst (or src) in sw
-				       * ring buffer
-				       */
-	/* easiest case (playback):
-	 * sw_data is nearly the same as ~ runtime->control->appl_ptr, with the
-	 * exception that sw_data is "behind" by the number if bytes ALSA wrote
-	 * to the intermediate buffer last time.
-	 * A call to ack() callback synchronizes both indirectly.
-	 */
-
-	/* We have no real sw_io pointer here. Usually sw_io is pointing to the
-	 * current playback/capture position _inside_ the hardware. Devices
-	 * with plain FIFOs often have no possibility to publish this position.
-	 * So we say: if sw_data is updated, that means bytes were copied to
-	 * the hardware, we increase sw_io by that amount, because there have
-	 * to be as much bytes which were played. So sw_io will stay behind
-	 * sw_data all the time and has to converge to sw_data at the end of
-	 * playback.
-	 */
-	unsigned int sw_io;           /* Current software pointer in bytes */
-
-	/* sw_ready: number of bytes ALSA copied to the intermediate buffer, so
-	 * it represents the number of bytes which wait for transfer to the HW
-	 */
-	int sw_ready;		  /* Bytes ready to be transferred to/from hw */
-
-	/* appl_ptr: last known position of ALSA (where ALSA is going to write
-	 * next time into the intermediate buffer
-	 */
-	snd_pcm_uframes_t appl_ptr;   /* Last seen appl_ptr */
-
-	unsigned int bytes2hw;
-	int check_alignment;
-
-#ifdef SND_PCM_INDIRECT2_STAT
-	unsigned int zeros2hw;
-	unsigned int mul_elapsed;
-	unsigned int mul_elapsed_real;
-	unsigned long firstbytetime;
-	unsigned long lastbytetime;
-	unsigned long firstzerotime;
-	unsigned int byte_sizes[64];
-	unsigned int zero_sizes[64];
-	unsigned int min_adds[8];
-	unsigned int mul_adds[8];
-	unsigned int zero_times[3750];	/* = 15s */
-	unsigned int zero_times_saved;
-	unsigned int zero_times_notsaved;
-	unsigned int irq_occured;
-	unsigned int pointer_calls;
-	unsigned int lastdifftime;
-#endif
-};
-
-typedef size_t (*snd_pcm_indirect2_copy_t) (struct snd_pcm_substream *substream,
-					   struct snd_pcm_indirect2 *rec,
-					   size_t bytes);
-typedef size_t (*snd_pcm_indirect2_zero_t) (struct snd_pcm_substream *substream,
-					   struct snd_pcm_indirect2 *rec);
-
-#ifdef SND_PCM_INDIRECT2_STAT
-void snd_pcm_indirect2_stat(struct snd_pcm_substream *substream,
-				   struct snd_pcm_indirect2 *rec);
-#endif
-
-snd_pcm_uframes_t
-snd_pcm_indirect2_pointer(struct snd_pcm_substream *substream,
-			  struct snd_pcm_indirect2 *rec);
-void
-snd_pcm_indirect2_playback_interrupt(struct snd_pcm_substream *substream,
-				     struct snd_pcm_indirect2 *rec,
-				     snd_pcm_indirect2_copy_t copy,
-				     snd_pcm_indirect2_zero_t zero);
-void
-snd_pcm_indirect2_capture_interrupt(struct snd_pcm_substream *substream,
-				    struct snd_pcm_indirect2 *rec,
-				    snd_pcm_indirect2_copy_t copy,
-				    snd_pcm_indirect2_zero_t null);
-
-#endif /* __SOUND_PCM_INDIRECT2_H */