From aa31704fd81c84f6a9e0b87f3455246936654ae6 Mon Sep 17 00:00:00 2001
From: Connor McAdams <conmanx360@gmail.com>
Date: Tue, 8 May 2018 13:20:03 -0400
Subject: [PATCH] ALSA: hda/ca0132: Add PCI region2 iomap for SBZ
Git-commit: aa31704fd81c84f6a9e0b87f3455246936654ae6
Patch-mainline: v4.18-rc1
References: bsc#1096696

This patch adds iomapping for the region2 section of memory on the SBZ.
This memory region is used in later patches for setting inputs and
outputs. If the mapping fails, the quirk is changed back to QUIRK_NONE
to avoid attempts to write to uninitialized memory.

It also adds a new exit sequence to unmap the iomem for the SBZ.

[ Reordered linux/*.h inclusion in the patch by tiwai ]

Signed-off-by: Connor McAdams <conmanx360@gmail.com>
Reviewed-by: Takashi Sakamoto <o-takashi@sakamocchi.jp>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

---
 sound/pci/hda/patch_ca0132.c |   19 +++++++++++++++++++
 1 file changed, 19 insertions(+)

--- a/sound/pci/hda/patch_ca0132.c
+++ b/sound/pci/hda/patch_ca0132.c
@@ -28,6 +28,9 @@
 #include <linux/module.h>
 #include <linux/firmware.h>
 #include <linux/kernel.h>
+#include <linux/types.h>
+#include <linux/io.h>
+#include <linux/pci.h>
 #include <sound/core.h>
 #include "hda_codec.h"
 #include "hda_local.h"
@@ -764,6 +767,11 @@ struct ca0132_spec {
 #ifdef ENABLE_TUNING_CONTROLS
 	long cur_ctl_vals[TUNING_CTLS_COUNT];
 #endif
+	/*
+	 * Sound Blaster Z PCI region 2 iomem, used for input and output
+	 * switching, and other unknown commands.
+	 */
+	void __iomem *mem_base;
 };
 
 /*
@@ -4700,6 +4708,8 @@ static void ca0132_free(struct hda_codec
 	snd_hda_sequence_write(codec, spec->base_exit_verbs);
 	ca0132_exit_chip(codec);
 	snd_hda_power_down(codec);
+	if (spec->mem_base)
+		iounmap(spec->mem_base);
 	kfree(spec->spec_init_verbs);
 	kfree(codec->spec);
 }
@@ -4915,6 +4925,15 @@ static int patch_ca0132(struct hda_codec
 	else
 		spec->quirk = QUIRK_NONE;
 
+	/* Setup BAR Region 2 for Sound Blaster Z */
+	if (spec->quirk == QUIRK_SBZ) {
+		spec->mem_base = pci_iomap(codec->bus->pci, 2, 0xC20);
+		if (spec->mem_base == NULL) {
+			codec_warn(codec, "pci_iomap failed!");
+			codec_info(codec, "perhaps this is not an SBZ?");
+			spec->quirk = QUIRK_NONE;
+		}
+	}
 	spec->dsp_state = DSP_DOWNLOAD_INIT;
 	spec->num_mixers = 1;
 	spec->mixers[0] = ca0132_mixer;