[Feature]add MT2731_MP2_MR2_SVN388 baseline version
Change-Id: Ief04314834b31e27effab435d3ca8ba33b499059
diff --git a/src/kernel/linux/v4.14/sound/ppc/keywest.c b/src/kernel/linux/v4.14/sound/ppc/keywest.c
new file mode 100644
index 0000000..4373615
--- /dev/null
+++ b/src/kernel/linux/v4.14/sound/ppc/keywest.c
@@ -0,0 +1,175 @@
+/*
+ * common keywest i2c layer
+ *
+ * Copyright (c) by Takashi Iwai <tiwai@suse.de>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+
+
+#include <linux/init.h>
+#include <linux/i2c.h>
+#include <linux/delay.h>
+#include <linux/module.h>
+#include <sound/core.h>
+#include "pmac.h"
+
+/*
+ * we have to keep a static variable here since i2c attach_adapter
+ * callback cannot pass a private data.
+ */
+static struct pmac_keywest *keywest_ctx;
+
+static bool keywest_probed;
+
+static int keywest_probe(struct i2c_client *client,
+ const struct i2c_device_id *id)
+{
+ keywest_probed = true;
+ /* If instantiated via i2c-powermac, we still need to set the client */
+ if (!keywest_ctx->client)
+ keywest_ctx->client = client;
+ i2c_set_clientdata(client, keywest_ctx);
+ return 0;
+}
+
+/*
+ * This is kind of a hack, best would be to turn powermac to fixed i2c
+ * bus numbers and declare the sound device as part of platform
+ * initialization
+ */
+static int keywest_attach_adapter(struct i2c_adapter *adapter)
+{
+ struct i2c_board_info info;
+
+ if (! keywest_ctx)
+ return -EINVAL;
+
+ if (strncmp(adapter->name, "mac-io", 6))
+ return -EINVAL; /* ignored */
+
+ memset(&info, 0, sizeof(struct i2c_board_info));
+ strlcpy(info.type, "keywest", I2C_NAME_SIZE);
+ info.addr = keywest_ctx->addr;
+ keywest_ctx->client = i2c_new_device(adapter, &info);
+ if (!keywest_ctx->client)
+ return -ENODEV;
+ /*
+ * We know the driver is already loaded, so the device should be
+ * already bound. If not it means binding failed, and then there
+ * is no point in keeping the device instantiated.
+ */
+ if (!keywest_ctx->client->dev.driver) {
+ i2c_unregister_device(keywest_ctx->client);
+ keywest_ctx->client = NULL;
+ return -ENODEV;
+ }
+
+ /*
+ * Let i2c-core delete that device on driver removal.
+ * This is safe because i2c-core holds the core_lock mutex for us.
+ */
+ list_add_tail(&keywest_ctx->client->detected,
+ &to_i2c_driver(keywest_ctx->client->dev.driver)->clients);
+ return 0;
+}
+
+static int keywest_remove(struct i2c_client *client)
+{
+ if (! keywest_ctx)
+ return 0;
+ if (client == keywest_ctx->client)
+ keywest_ctx->client = NULL;
+
+ return 0;
+}
+
+
+static const struct i2c_device_id keywest_i2c_id[] = {
+ { "MAC,tas3004", 0 }, /* instantiated by i2c-powermac */
+ { "keywest", 0 }, /* instantiated by us if needed */
+ { }
+};
+MODULE_DEVICE_TABLE(i2c, keywest_i2c_id);
+
+static struct i2c_driver keywest_driver = {
+ .driver = {
+ .name = "PMac Keywest Audio",
+ },
+ .probe = keywest_probe,
+ .remove = keywest_remove,
+ .id_table = keywest_i2c_id,
+};
+
+/* exported */
+void snd_pmac_keywest_cleanup(struct pmac_keywest *i2c)
+{
+ if (keywest_ctx && keywest_ctx == i2c) {
+ i2c_del_driver(&keywest_driver);
+ keywest_ctx = NULL;
+ }
+}
+
+int snd_pmac_tumbler_post_init(void)
+{
+ int err;
+
+ if (!keywest_ctx || !keywest_ctx->client)
+ return -ENXIO;
+
+ if ((err = keywest_ctx->init_client(keywest_ctx)) < 0) {
+ snd_printk(KERN_ERR "tumbler: %i :cannot initialize the MCS\n", err);
+ return err;
+ }
+ return 0;
+}
+
+/* exported */
+int snd_pmac_keywest_init(struct pmac_keywest *i2c)
+{
+ struct i2c_adapter *adap;
+ int err, i = 0;
+
+ if (keywest_ctx)
+ return -EBUSY;
+
+ adap = i2c_get_adapter(0);
+ if (!adap)
+ return -EPROBE_DEFER;
+
+ keywest_ctx = i2c;
+
+ if ((err = i2c_add_driver(&keywest_driver))) {
+ snd_printk(KERN_ERR "cannot register keywest i2c driver\n");
+ i2c_put_adapter(adap);
+ return err;
+ }
+
+ /* There was already a device from i2c-powermac. Great, let's return */
+ if (keywest_probed)
+ return 0;
+
+ /* We assume Macs have consecutive I2C bus numbers starting at 0 */
+ while (adap) {
+ /* Scan for devices to be bound to */
+ err = keywest_attach_adapter(adap);
+ if (!err)
+ return 0;
+ i2c_put_adapter(adap);
+ adap = i2c_get_adapter(++i);
+ }
+
+ return -ENODEV;
+}