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@@ -0,0 +1,1201 @@
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+/* Copyright (c) 2016-2017, The Linux Foundation. All rights reserved.
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+ *
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+ * This program is free software; you can redistribute it and/or modify
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+ * it under the terms of the GNU General Public License version 2 and
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+ * only version 2 as published by the Free Software Foundation.
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+ *
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+ * This program is distributed in the hope that it will be useful,
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+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
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+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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+ * GNU General Public License for more details.
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+ */
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+
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+#include <linux/init.h>
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+#include <linux/kernel.h>
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+#include <linux/module.h>
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+#include <linux/mutex.h>
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+#include <linux/errno.h>
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+#include <linux/fs.h>
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+#include <linux/uaccess.h>
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+#include <linux/slab.h>
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+#include <linux/list.h>
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+#include <linux/cdev.h>
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+#include <linux/platform_device.h>
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+#include <linux/vmalloc.h>
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+#include <soc/qcom/glink.h>
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+#include "sound/wcd-dsp-glink.h"
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+
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+#define WDSP_GLINK_DRIVER_NAME "wcd-dsp-glink"
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+#define WDSP_MAX_WRITE_SIZE (256 * 1024)
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+#define WDSP_MAX_READ_SIZE (4 * 1024)
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+#define WDSP_MAX_NO_OF_INTENTS (20)
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+#define WDSP_MAX_NO_OF_CHANNELS (10)
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+#define WDSP_WRITE_PKT_SIZE (sizeof(struct wdsp_write_pkt))
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+#define WDSP_REG_PKT_SIZE (sizeof(struct wdsp_reg_pkt))
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+#define WDSP_CMD_PKT_SIZE (sizeof(struct wdsp_cmd_pkt))
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+#define WDSP_CH_CFG_SIZE (sizeof(struct wdsp_glink_ch_cfg))
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+
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+#define MINOR_NUMBER_COUNT 1
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+#define WDSP_EDGE "wdsp"
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+#define RESP_QUEUE_SIZE 3
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+#define QOS_PKT_SIZE 1024
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+#define TIMEOUT_MS 1000
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+
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+struct wdsp_glink_dev {
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+ struct class *cls;
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+ struct device *dev;
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+ struct cdev cdev;
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+ dev_t dev_num;
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+};
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+
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+struct wdsp_glink_rsp_que {
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+ /* Size of valid data in buffer */
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+ u32 buf_size;
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+
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+ /* Response buffer */
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+ u8 buf[WDSP_MAX_READ_SIZE];
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+};
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+
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+struct wdsp_glink_tx_buf {
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+ struct work_struct tx_work;
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+ struct work_struct free_tx_work;
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+
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+ /* Glink channel information */
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+ struct wdsp_glink_ch *ch;
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+
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+ /* Tx buffer to send to glink */
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+ u8 buf[0];
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+};
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+
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+struct wdsp_glink_ch {
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+ struct wdsp_glink_priv *wpriv;
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+
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+ /* Glink channel handle */
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+ void *handle;
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+
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+ /* Channel states like connect, disconnect */
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+ int channel_state;
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+ struct mutex mutex;
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+
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+ /* To free up the channel memory */
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+ bool free_mem;
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+
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+ /* Glink local channel open work */
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+ struct work_struct lcl_ch_open_wrk;
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+
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+ /* Glink local channel close work */
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+ struct work_struct lcl_ch_cls_wrk;
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+
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+ /* Wait for ch connect state before sending any command */
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+ wait_queue_head_t ch_connect_wait;
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+
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+ /*
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+ * Glink channel configuration. This has to be the last
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+ * member of the strucuture as it has variable size
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+ */
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+ struct wdsp_glink_ch_cfg ch_cfg;
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+};
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+
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+struct wdsp_glink_state {
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+ /* Glink link state information */
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+ enum glink_link_state link_state;
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+ void *handle;
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+};
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+
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+struct wdsp_glink_priv {
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+ /* Respone buffer related */
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+ u8 rsp_cnt;
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+ struct wdsp_glink_rsp_que rsp[RESP_QUEUE_SIZE];
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+ struct completion rsp_complete;
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+ struct mutex rsp_mutex;
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+
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+ /* Glink channel related */
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+ struct mutex glink_mutex;
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+ struct wdsp_glink_state glink_state;
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+ struct wdsp_glink_ch **ch;
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+ u8 no_of_channels;
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+ struct work_struct ch_open_cls_wrk;
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+ struct workqueue_struct *work_queue;
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+
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+ wait_queue_head_t link_state_wait;
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+
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+ struct device *dev;
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+};
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+
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+static int wdsp_glink_close_ch(struct wdsp_glink_ch *ch);
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+static int wdsp_glink_open_ch(struct wdsp_glink_ch *ch);
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+
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+/*
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+ * wdsp_glink_free_tx_buf_work - Work function to free tx pkt
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+ * work: Work structure
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+ */
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+static void wdsp_glink_free_tx_buf_work(struct work_struct *work)
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+{
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+ struct wdsp_glink_tx_buf *tx_buf;
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+
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+ tx_buf = container_of(work, struct wdsp_glink_tx_buf,
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+ free_tx_work);
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+ vfree(tx_buf);
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+}
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+
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+/*
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+ * wdsp_glink_free_tx_buf - Function to free tx buffer
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+ * priv: Pointer to the channel
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+ * pkt_priv: Pointer to the tx buffer
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+ */
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+static void wdsp_glink_free_tx_buf(const void *priv, const void *pkt_priv)
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+{
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+ struct wdsp_glink_tx_buf *tx_buf = (struct wdsp_glink_tx_buf *)pkt_priv;
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+ struct wdsp_glink_priv *wpriv;
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+ struct wdsp_glink_ch *ch;
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+
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+ if (!priv) {
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+ pr_err("%s: Invalid priv\n", __func__);
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+ return;
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+ }
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+ if (!tx_buf) {
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+ pr_err("%s: Invalid tx_buf\n", __func__);
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+ return;
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+ }
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+
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+ ch = (struct wdsp_glink_ch *)priv;
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+ wpriv = ch->wpriv;
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+ /* Work queue to free tx pkt */
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+ INIT_WORK(&tx_buf->free_tx_work, wdsp_glink_free_tx_buf_work);
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+ queue_work(wpriv->work_queue, &tx_buf->free_tx_work);
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+}
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+
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+/*
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+ * wdsp_glink_notify_rx - Glink notify rx callback for responses
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+ * handle: Opaque Channel handle returned by GLink
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+ * priv: Private pointer to the channel
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+ * pkt_priv: Private pointer to the packet
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+ * ptr: Pointer to the Rx data
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+ * size: Size of the Rx data
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+ */
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+static void wdsp_glink_notify_rx(void *handle, const void *priv,
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+ const void *pkt_priv, const void *ptr,
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+ size_t size)
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+{
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+ u8 *rx_buf;
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+ u8 rsp_cnt;
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+ struct wdsp_glink_ch *ch;
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+ struct wdsp_glink_priv *wpriv;
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+
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+ if (!ptr || !priv) {
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+ pr_err("%s: Invalid parameters\n", __func__);
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+ return;
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+ }
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+
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+ ch = (struct wdsp_glink_ch *)priv;
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+ wpriv = ch->wpriv;
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+ rx_buf = (u8 *)ptr;
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+ if (size > WDSP_MAX_READ_SIZE) {
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+ dev_err(wpriv->dev, "%s: Size %zd is greater than allowed %d\n",
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+ __func__, size, WDSP_MAX_READ_SIZE);
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+ size = WDSP_MAX_READ_SIZE;
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+ }
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+
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+ mutex_lock(&wpriv->rsp_mutex);
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+ rsp_cnt = wpriv->rsp_cnt;
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+ if (rsp_cnt >= RESP_QUEUE_SIZE) {
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+ dev_err(wpriv->dev, "%s: Resp Queue is Full\n", __func__);
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+ rsp_cnt = 0;
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+ }
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+ dev_dbg(wpriv->dev, "%s: copy into buffer %d\n", __func__, rsp_cnt);
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+
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+ memcpy(wpriv->rsp[rsp_cnt].buf, rx_buf, size);
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+ wpriv->rsp[rsp_cnt].buf_size = size;
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+ wpriv->rsp_cnt = ++rsp_cnt;
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+ mutex_unlock(&wpriv->rsp_mutex);
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+
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+ glink_rx_done(handle, ptr, true);
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+ complete(&wpriv->rsp_complete);
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+}
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+
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+/*
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+ * wdsp_glink_notify_tx_done - Glink notify tx done callback to
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+ * free tx buffer
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+ * handle: Opaque Channel handle returned by GLink
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+ * priv: Private pointer to the channel
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+ * pkt_priv: Private pointer to the packet
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+ * ptr: Pointer to the Tx data
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+ */
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+static void wdsp_glink_notify_tx_done(void *handle, const void *priv,
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+ const void *pkt_priv, const void *ptr)
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+{
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+ wdsp_glink_free_tx_buf(priv, pkt_priv);
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+}
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+/*
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+ * wdsp_glink_notify_tx_abort - Glink notify tx abort callback to
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+ * free tx buffer
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+ * handle: Opaque Channel handle returned by GLink
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+ * priv: Private pointer to the channel
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+ * pkt_priv: Private pointer to the packet
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+ */
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+static void wdsp_glink_notify_tx_abort(void *handle, const void *priv,
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+ const void *pkt_priv)
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+{
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+ wdsp_glink_free_tx_buf(priv, pkt_priv);
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+}
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+
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+/*
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+ * wdsp_glink_notify_rx_intent_req - Glink notify rx intent request callback
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+ * to queue buffer to receive from remote client
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+ * handle: Opaque channel handle returned by GLink
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+ * priv: Private pointer to the channel
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+ * req_size: Size of intent to be queued
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+ */
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+static bool wdsp_glink_notify_rx_intent_req(void *handle, const void *priv,
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+ size_t req_size)
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+{
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+ struct wdsp_glink_priv *wpriv;
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+ struct wdsp_glink_ch *ch;
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+ int rc = 0;
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+ bool ret = false;
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+
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+ if (!priv) {
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+ pr_err("%s: Invalid priv\n", __func__);
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+ goto done;
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+ }
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+ if (req_size > WDSP_MAX_READ_SIZE) {
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+ pr_err("%s: Invalid req_size %zd\n", __func__, req_size);
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+ goto done;
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+ }
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+
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+ ch = (struct wdsp_glink_ch *)priv;
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+ wpriv = ch->wpriv;
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+
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+ dev_dbg(wpriv->dev, "%s: intent size %zd requested for ch name %s",
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+ __func__, req_size, ch->ch_cfg.name);
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+
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+ mutex_lock(&ch->mutex);
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+ rc = glink_queue_rx_intent(ch->handle, ch, req_size);
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+ if (rc < 0) {
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+ dev_err(wpriv->dev, "%s: Failed to queue rx intent, rc = %d\n",
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+ __func__, rc);
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+ mutex_unlock(&ch->mutex);
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+ goto done;
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+ }
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+ mutex_unlock(&ch->mutex);
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+ ret = true;
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+
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+done:
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+ return ret;
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+}
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+
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+/*
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+ * wdsp_glink_lcl_ch_open_wrk - Work function to open channel again
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+ * when local disconnect event happens
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+ * work: Work structure
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+ */
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+static void wdsp_glink_lcl_ch_open_wrk(struct work_struct *work)
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+{
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+ struct wdsp_glink_ch *ch;
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+
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+ ch = container_of(work, struct wdsp_glink_ch,
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+ lcl_ch_open_wrk);
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+
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+ wdsp_glink_open_ch(ch);
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+}
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+
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+/*
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+ * wdsp_glink_lcl_ch_cls_wrk - Work function to close channel locally
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+ * when remote disconnect event happens
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+ * work: Work structure
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+ */
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+static void wdsp_glink_lcl_ch_cls_wrk(struct work_struct *work)
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+{
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+ struct wdsp_glink_ch *ch;
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+
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+ ch = container_of(work, struct wdsp_glink_ch,
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+ lcl_ch_cls_wrk);
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+
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+ wdsp_glink_close_ch(ch);
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+}
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+
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+/*
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+ * wdsp_glink_notify_state - Glink channel state information event callback
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+ * handle: Opaque Channel handle returned by GLink
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+ * priv: Private pointer to the channel
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+ * event: channel state event
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+ */
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+static void wdsp_glink_notify_state(void *handle, const void *priv,
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+ unsigned int event)
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+{
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+ struct wdsp_glink_priv *wpriv;
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+ struct wdsp_glink_ch *ch;
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+ int i, ret = 0;
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+
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+ if (!priv) {
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+ pr_err("%s: Invalid priv\n", __func__);
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+ return;
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+ }
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+
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+ ch = (struct wdsp_glink_ch *)priv;
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+ wpriv = ch->wpriv;
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+
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+ mutex_lock(&ch->mutex);
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+ ch->channel_state = event;
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+ if (event == GLINK_CONNECTED) {
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+ dev_dbg(wpriv->dev, "%s: glink channel: %s connected\n",
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+ __func__, ch->ch_cfg.name);
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+
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+ for (i = 0; i < ch->ch_cfg.no_of_intents; i++) {
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+ dev_dbg(wpriv->dev, "%s: intent_size = %d\n", __func__,
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+ ch->ch_cfg.intents_size[i]);
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+ ret = glink_queue_rx_intent(ch->handle, ch,
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+ ch->ch_cfg.intents_size[i]);
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+ if (ret < 0)
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+ dev_warn(wpriv->dev, "%s: Failed to queue intent %d of size %d\n",
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+ __func__, i,
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+ ch->ch_cfg.intents_size[i]);
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+ }
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+
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+ ret = glink_qos_latency(ch->handle, ch->ch_cfg.latency_in_us,
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+ QOS_PKT_SIZE);
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+ if (ret < 0)
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+ dev_warn(wpriv->dev, "%s: Failed to request qos %d for ch %s\n",
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+ __func__, ch->ch_cfg.latency_in_us,
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+ ch->ch_cfg.name);
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+
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+ wake_up(&ch->ch_connect_wait);
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+ mutex_unlock(&ch->mutex);
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+ } else if (event == GLINK_LOCAL_DISCONNECTED) {
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+ /*
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+ * Don't use dev_dbg here as dev may not be valid if channel
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+ * closed from driver close.
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+ */
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+ pr_debug("%s: channel: %s disconnected locally\n",
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+ __func__, ch->ch_cfg.name);
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+ mutex_unlock(&ch->mutex);
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+
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+ if (ch->free_mem) {
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+ kfree(ch);
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+ ch = NULL;
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+ }
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+ } else if (event == GLINK_REMOTE_DISCONNECTED) {
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+ dev_dbg(wpriv->dev, "%s: remote channel: %s disconnected remotely\n",
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+ __func__, ch->ch_cfg.name);
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+ mutex_unlock(&ch->mutex);
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+ /*
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+ * If remote disconnect happens, local side also has
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+ * to close the channel as per glink design in a
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+ * separate work_queue.
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+ */
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+ queue_work(wpriv->work_queue, &ch->lcl_ch_cls_wrk);
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+ }
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+}
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+
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+/*
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+ * wdsp_glink_close_ch - Internal function to close glink channel
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+ * ch: Glink Channel structure.
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+ */
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+static int wdsp_glink_close_ch(struct wdsp_glink_ch *ch)
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+{
|
|
|
+ struct wdsp_glink_priv *wpriv = ch->wpriv;
|
|
|
+ int ret = 0;
|
|
|
+
|
|
|
+ mutex_lock(&wpriv->glink_mutex);
|
|
|
+ if (ch->handle) {
|
|
|
+ ret = glink_close(ch->handle);
|
|
|
+ if (ret < 0) {
|
|
|
+ dev_err(wpriv->dev, "%s: glink_close is failed, ret = %d\n",
|
|
|
+ __func__, ret);
|
|
|
+ } else {
|
|
|
+ ch->handle = NULL;
|
|
|
+ dev_dbg(wpriv->dev, "%s: ch %s is closed\n", __func__,
|
|
|
+ ch->ch_cfg.name);
|
|
|
+ }
|
|
|
+ } else {
|
|
|
+ dev_dbg(wpriv->dev, "%s: ch %s is already closed\n", __func__,
|
|
|
+ ch->ch_cfg.name);
|
|
|
+ }
|
|
|
+ mutex_unlock(&wpriv->glink_mutex);
|
|
|
+
|
|
|
+
|
|
|
+ return ret;
|
|
|
+}
|
|
|
+
|
|
|
+/*
|
|
|
+ * wdsp_glink_open_ch - Internal function to open glink channel
|
|
|
+ * ch: Glink Channel structure.
|
|
|
+ */
|
|
|
+static int wdsp_glink_open_ch(struct wdsp_glink_ch *ch)
|
|
|
+{
|
|
|
+ struct wdsp_glink_priv *wpriv = ch->wpriv;
|
|
|
+ struct glink_open_config open_cfg;
|
|
|
+ int ret = 0;
|
|
|
+
|
|
|
+ mutex_lock(&wpriv->glink_mutex);
|
|
|
+ if (!ch->handle) {
|
|
|
+ memset(&open_cfg, 0, sizeof(open_cfg));
|
|
|
+ open_cfg.options = GLINK_OPT_INITIAL_XPORT;
|
|
|
+ open_cfg.edge = WDSP_EDGE;
|
|
|
+ open_cfg.notify_rx = wdsp_glink_notify_rx;
|
|
|
+ open_cfg.notify_tx_done = wdsp_glink_notify_tx_done;
|
|
|
+ open_cfg.notify_tx_abort = wdsp_glink_notify_tx_abort;
|
|
|
+ open_cfg.notify_state = wdsp_glink_notify_state;
|
|
|
+ open_cfg.notify_rx_intent_req = wdsp_glink_notify_rx_intent_req;
|
|
|
+ open_cfg.priv = ch;
|
|
|
+ open_cfg.name = ch->ch_cfg.name;
|
|
|
+
|
|
|
+ dev_dbg(wpriv->dev, "%s: ch->ch_cfg.name = %s, latency_in_us = %d, intents = %d\n",
|
|
|
+ __func__, ch->ch_cfg.name, ch->ch_cfg.latency_in_us,
|
|
|
+ ch->ch_cfg.no_of_intents);
|
|
|
+
|
|
|
+ ch->handle = glink_open(&open_cfg);
|
|
|
+ if (IS_ERR_OR_NULL(ch->handle)) {
|
|
|
+ dev_err(wpriv->dev, "%s: glink_open failed for ch %s\n",
|
|
|
+ __func__, ch->ch_cfg.name);
|
|
|
+ ch->handle = NULL;
|
|
|
+ ret = -EINVAL;
|
|
|
+ }
|
|
|
+ } else {
|
|
|
+ dev_err(wpriv->dev, "%s: ch %s is already opened\n", __func__,
|
|
|
+ ch->ch_cfg.name);
|
|
|
+ }
|
|
|
+ mutex_unlock(&wpriv->glink_mutex);
|
|
|
+
|
|
|
+ return ret;
|
|
|
+}
|
|
|
+
|
|
|
+/*
|
|
|
+ * wdsp_glink_close_all_ch - Internal function to close all glink channels
|
|
|
+ * wpriv: Wdsp_glink private structure
|
|
|
+ */
|
|
|
+static void wdsp_glink_close_all_ch(struct wdsp_glink_priv *wpriv)
|
|
|
+{
|
|
|
+ int i;
|
|
|
+
|
|
|
+ for (i = 0; i < wpriv->no_of_channels; i++)
|
|
|
+ if (wpriv->ch && wpriv->ch[i])
|
|
|
+ wdsp_glink_close_ch(wpriv->ch[i]);
|
|
|
+}
|
|
|
+
|
|
|
+/*
|
|
|
+ * wdsp_glink_open_all_ch - Internal function to open all glink channels
|
|
|
+ * wpriv: Wdsp_glink private structure
|
|
|
+ */
|
|
|
+static int wdsp_glink_open_all_ch(struct wdsp_glink_priv *wpriv)
|
|
|
+{
|
|
|
+ int ret = 0, i, j;
|
|
|
+
|
|
|
+ for (i = 0; i < wpriv->no_of_channels; i++) {
|
|
|
+ if (wpriv->ch && wpriv->ch[i]) {
|
|
|
+ ret = wdsp_glink_open_ch(wpriv->ch[i]);
|
|
|
+ if (ret < 0)
|
|
|
+ goto err_open;
|
|
|
+ }
|
|
|
+ }
|
|
|
+ goto done;
|
|
|
+
|
|
|
+err_open:
|
|
|
+ for (j = 0; j < i; j++)
|
|
|
+ if (wpriv->ch[i])
|
|
|
+ wdsp_glink_close_ch(wpriv->ch[j]);
|
|
|
+
|
|
|
+done:
|
|
|
+ return ret;
|
|
|
+}
|
|
|
+
|
|
|
+/*
|
|
|
+ * wdsp_glink_ch_open_wq - Work function to open glink channels
|
|
|
+ * work: Work structure
|
|
|
+ */
|
|
|
+static void wdsp_glink_ch_open_cls_wrk(struct work_struct *work)
|
|
|
+{
|
|
|
+ struct wdsp_glink_priv *wpriv;
|
|
|
+
|
|
|
+ wpriv = container_of(work, struct wdsp_glink_priv,
|
|
|
+ ch_open_cls_wrk);
|
|
|
+
|
|
|
+ if (wpriv->glink_state.link_state == GLINK_LINK_STATE_DOWN) {
|
|
|
+ dev_info(wpriv->dev, "%s: GLINK_LINK_STATE_DOWN\n",
|
|
|
+ __func__);
|
|
|
+
|
|
|
+ wdsp_glink_close_all_ch(wpriv);
|
|
|
+ } else if (wpriv->glink_state.link_state == GLINK_LINK_STATE_UP) {
|
|
|
+ dev_info(wpriv->dev, "%s: GLINK_LINK_STATE_UP\n",
|
|
|
+ __func__);
|
|
|
+
|
|
|
+ wdsp_glink_open_all_ch(wpriv);
|
|
|
+ }
|
|
|
+}
|
|
|
+
|
|
|
+/*
|
|
|
+ * wdsp_glink_link_state_cb - Glink link state callback to inform
|
|
|
+ * about link states
|
|
|
+ * cb_info: Glink link state callback information structure
|
|
|
+ * priv: Private structure of link state passed while register
|
|
|
+ */
|
|
|
+static void wdsp_glink_link_state_cb(struct glink_link_state_cb_info *cb_info,
|
|
|
+ void *priv)
|
|
|
+{
|
|
|
+ struct wdsp_glink_priv *wpriv;
|
|
|
+
|
|
|
+ if (!cb_info || !priv) {
|
|
|
+ pr_err("%s: Invalid parameters\n", __func__);
|
|
|
+ return;
|
|
|
+ }
|
|
|
+
|
|
|
+ wpriv = (struct wdsp_glink_priv *)priv;
|
|
|
+
|
|
|
+ mutex_lock(&wpriv->glink_mutex);
|
|
|
+ wpriv->glink_state.link_state = cb_info->link_state;
|
|
|
+ wake_up(&wpriv->link_state_wait);
|
|
|
+ mutex_unlock(&wpriv->glink_mutex);
|
|
|
+
|
|
|
+ queue_work(wpriv->work_queue, &wpriv->ch_open_cls_wrk);
|
|
|
+}
|
|
|
+
|
|
|
+/*
|
|
|
+ * wdsp_glink_ch_info_init- Internal function to allocate channel memory
|
|
|
+ * and register with glink
|
|
|
+ * wpriv: Wdsp_glink private structure.
|
|
|
+ * pkt: Glink registration packet contains glink channel information.
|
|
|
+ * pkt_size: Size of the pkt.
|
|
|
+ */
|
|
|
+static int wdsp_glink_ch_info_init(struct wdsp_glink_priv *wpriv,
|
|
|
+ struct wdsp_reg_pkt *pkt, size_t pkt_size)
|
|
|
+{
|
|
|
+ int ret = 0, i, j;
|
|
|
+ struct glink_link_info link_info;
|
|
|
+ struct wdsp_glink_ch_cfg *ch_cfg;
|
|
|
+ struct wdsp_glink_ch **ch;
|
|
|
+ u8 no_of_channels;
|
|
|
+ u8 *payload;
|
|
|
+ u32 ch_size, ch_cfg_size;
|
|
|
+ size_t size = WDSP_WRITE_PKT_SIZE + WDSP_REG_PKT_SIZE;
|
|
|
+
|
|
|
+ mutex_lock(&wpriv->glink_mutex);
|
|
|
+ if (wpriv->ch) {
|
|
|
+ dev_err(wpriv->dev, "%s: glink ch memory is already allocated\n",
|
|
|
+ __func__);
|
|
|
+ ret = -EINVAL;
|
|
|
+ goto done;
|
|
|
+ }
|
|
|
+ payload = (u8 *)pkt->payload;
|
|
|
+ no_of_channels = pkt->no_of_channels;
|
|
|
+
|
|
|
+ if (no_of_channels > WDSP_MAX_NO_OF_CHANNELS) {
|
|
|
+ dev_err(wpriv->dev, "%s: no_of_channels: %d but max allowed are %d\n",
|
|
|
+ __func__, no_of_channels, WDSP_MAX_NO_OF_CHANNELS);
|
|
|
+ ret = -EINVAL;
|
|
|
+ goto done;
|
|
|
+ }
|
|
|
+ ch = kcalloc(no_of_channels, sizeof(struct wdsp_glink_ch *),
|
|
|
+ GFP_ATOMIC);
|
|
|
+ if (!ch) {
|
|
|
+ ret = -ENOMEM;
|
|
|
+ goto done;
|
|
|
+ }
|
|
|
+ wpriv->ch = ch;
|
|
|
+ wpriv->no_of_channels = no_of_channels;
|
|
|
+
|
|
|
+ for (i = 0; i < no_of_channels; i++) {
|
|
|
+ ch_cfg = (struct wdsp_glink_ch_cfg *)payload;
|
|
|
+
|
|
|
+ size += WDSP_CH_CFG_SIZE;
|
|
|
+ if (size > pkt_size) {
|
|
|
+ dev_err(wpriv->dev, "%s: Invalid size = %zd, pkt_size = %zd\n",
|
|
|
+ __func__, size, pkt_size);
|
|
|
+ ret = -EINVAL;
|
|
|
+ goto err_ch_mem;
|
|
|
+ }
|
|
|
+ if (ch_cfg->no_of_intents > WDSP_MAX_NO_OF_INTENTS) {
|
|
|
+ dev_err(wpriv->dev, "%s: Invalid no_of_intents = %d\n",
|
|
|
+ __func__, ch_cfg->no_of_intents);
|
|
|
+ ret = -EINVAL;
|
|
|
+ goto err_ch_mem;
|
|
|
+ }
|
|
|
+ size += (sizeof(u32) * ch_cfg->no_of_intents);
|
|
|
+ if (size > pkt_size) {
|
|
|
+ dev_err(wpriv->dev, "%s: Invalid size = %zd, pkt_size = %zd\n",
|
|
|
+ __func__, size, pkt_size);
|
|
|
+ ret = -EINVAL;
|
|
|
+ goto err_ch_mem;
|
|
|
+ }
|
|
|
+
|
|
|
+ ch_cfg_size = sizeof(struct wdsp_glink_ch_cfg) +
|
|
|
+ (sizeof(u32) * ch_cfg->no_of_intents);
|
|
|
+ ch_size = sizeof(struct wdsp_glink_ch) +
|
|
|
+ (sizeof(u32) * ch_cfg->no_of_intents);
|
|
|
+
|
|
|
+ dev_dbg(wpriv->dev, "%s: channels: %d ch_cfg_size: %d, size: %zd, pkt_size: %zd",
|
|
|
+ __func__, no_of_channels, ch_cfg_size, size, pkt_size);
|
|
|
+
|
|
|
+ ch[i] = kzalloc(ch_size, GFP_KERNEL);
|
|
|
+ if (!ch[i]) {
|
|
|
+ ret = -ENOMEM;
|
|
|
+ goto err_ch_mem;
|
|
|
+ }
|
|
|
+ ch[i]->channel_state = GLINK_LOCAL_DISCONNECTED;
|
|
|
+ memcpy(&ch[i]->ch_cfg, payload, ch_cfg_size);
|
|
|
+ payload += ch_cfg_size;
|
|
|
+
|
|
|
+ mutex_init(&ch[i]->mutex);
|
|
|
+ ch[i]->wpriv = wpriv;
|
|
|
+ INIT_WORK(&ch[i]->lcl_ch_open_wrk, wdsp_glink_lcl_ch_open_wrk);
|
|
|
+ INIT_WORK(&ch[i]->lcl_ch_cls_wrk, wdsp_glink_lcl_ch_cls_wrk);
|
|
|
+ init_waitqueue_head(&ch[i]->ch_connect_wait);
|
|
|
+ }
|
|
|
+
|
|
|
+ INIT_WORK(&wpriv->ch_open_cls_wrk, wdsp_glink_ch_open_cls_wrk);
|
|
|
+
|
|
|
+ /* Register glink link_state notification */
|
|
|
+ link_info.glink_link_state_notif_cb = wdsp_glink_link_state_cb;
|
|
|
+ link_info.transport = NULL;
|
|
|
+ link_info.edge = WDSP_EDGE;
|
|
|
+
|
|
|
+ wpriv->glink_state.link_state = GLINK_LINK_STATE_DOWN;
|
|
|
+ wpriv->glink_state.handle = glink_register_link_state_cb(&link_info,
|
|
|
+ wpriv);
|
|
|
+ if (!wpriv->glink_state.handle) {
|
|
|
+ dev_err(wpriv->dev, "%s: Unable to register wdsp link state\n",
|
|
|
+ __func__);
|
|
|
+ ret = -EINVAL;
|
|
|
+ goto err_ch_mem;
|
|
|
+ }
|
|
|
+ goto done;
|
|
|
+
|
|
|
+err_ch_mem:
|
|
|
+ for (j = 0; j < i; j++) {
|
|
|
+ mutex_destroy(&ch[j]->mutex);
|
|
|
+ kfree(wpriv->ch[j]);
|
|
|
+ wpriv->ch[j] = NULL;
|
|
|
+ }
|
|
|
+ kfree(wpriv->ch);
|
|
|
+ wpriv->ch = NULL;
|
|
|
+ wpriv->no_of_channels = 0;
|
|
|
+
|
|
|
+done:
|
|
|
+ mutex_unlock(&wpriv->glink_mutex);
|
|
|
+ return ret;
|
|
|
+}
|
|
|
+
|
|
|
+/*
|
|
|
+ * wdsp_glink_tx_buf_work - Work queue function to send tx buffer to glink
|
|
|
+ * work: Work structure
|
|
|
+ */
|
|
|
+static void wdsp_glink_tx_buf_work(struct work_struct *work)
|
|
|
+{
|
|
|
+ struct wdsp_glink_priv *wpriv;
|
|
|
+ struct wdsp_glink_ch *ch;
|
|
|
+ struct wdsp_glink_tx_buf *tx_buf;
|
|
|
+ struct wdsp_write_pkt *wpkt;
|
|
|
+ struct wdsp_cmd_pkt *cpkt;
|
|
|
+ int ret = 0;
|
|
|
+
|
|
|
+ tx_buf = container_of(work, struct wdsp_glink_tx_buf,
|
|
|
+ tx_work);
|
|
|
+ ch = tx_buf->ch;
|
|
|
+ wpriv = ch->wpriv;
|
|
|
+ wpkt = (struct wdsp_write_pkt *)tx_buf->buf;
|
|
|
+ cpkt = (struct wdsp_cmd_pkt *)wpkt->payload;
|
|
|
+ dev_dbg(wpriv->dev, "%s: ch name = %s, payload size = %d\n",
|
|
|
+ __func__, cpkt->ch_name, cpkt->payload_size);
|
|
|
+
|
|
|
+ mutex_lock(&tx_buf->ch->mutex);
|
|
|
+ if (ch->channel_state == GLINK_CONNECTED) {
|
|
|
+ mutex_unlock(&tx_buf->ch->mutex);
|
|
|
+ ret = glink_tx(ch->handle, tx_buf,
|
|
|
+ cpkt->payload, cpkt->payload_size,
|
|
|
+ GLINK_TX_REQ_INTENT);
|
|
|
+ if (ret < 0) {
|
|
|
+ dev_err(wpriv->dev, "%s: glink tx failed, ret = %d\n",
|
|
|
+ __func__, ret);
|
|
|
+ /*
|
|
|
+ * If glink_tx() is failed then free tx_buf here as
|
|
|
+ * there won't be any tx_done notification to
|
|
|
+ * free the buffer.
|
|
|
+ */
|
|
|
+ vfree(tx_buf);
|
|
|
+ }
|
|
|
+ } else {
|
|
|
+ mutex_unlock(&tx_buf->ch->mutex);
|
|
|
+ dev_err(wpriv->dev, "%s: channel %s is not in connected state\n",
|
|
|
+ __func__, ch->ch_cfg.name);
|
|
|
+ /*
|
|
|
+ * Free tx_buf here as there won't be any tx_done
|
|
|
+ * notification in this case also.
|
|
|
+ */
|
|
|
+ vfree(tx_buf);
|
|
|
+ }
|
|
|
+}
|
|
|
+
|
|
|
+/*
|
|
|
+ * wdsp_glink_read - Read API to send the data to userspace
|
|
|
+ * file: Pointer to the file structure
|
|
|
+ * buf: Pointer to the userspace buffer
|
|
|
+ * count: Number bytes to read from the file
|
|
|
+ * ppos: Pointer to the position into the file
|
|
|
+ */
|
|
|
+static ssize_t wdsp_glink_read(struct file *file, char __user *buf,
|
|
|
+ size_t count, loff_t *ppos)
|
|
|
+{
|
|
|
+ int ret = 0, ret1 = 0;
|
|
|
+ struct wdsp_glink_rsp_que *rsp;
|
|
|
+ struct wdsp_glink_priv *wpriv;
|
|
|
+
|
|
|
+ wpriv = (struct wdsp_glink_priv *)file->private_data;
|
|
|
+ if (!wpriv) {
|
|
|
+ pr_err("%s: Invalid private data\n", __func__);
|
|
|
+ ret = -EINVAL;
|
|
|
+ goto done;
|
|
|
+ }
|
|
|
+
|
|
|
+ if (count > WDSP_MAX_READ_SIZE) {
|
|
|
+ dev_info(wpriv->dev, "%s: count = %zd is more than WDSP_MAX_READ_SIZE\n",
|
|
|
+ __func__, count);
|
|
|
+ count = WDSP_MAX_READ_SIZE;
|
|
|
+ }
|
|
|
+ /*
|
|
|
+ * Complete signal has given from glink rx notification callback
|
|
|
+ * or from flush API. Also use interruptible wait_for_completion API
|
|
|
+ * to allow the system to go in suspend.
|
|
|
+ */
|
|
|
+ ret = wait_for_completion_interruptible(&wpriv->rsp_complete);
|
|
|
+ if (ret)
|
|
|
+ goto done;
|
|
|
+
|
|
|
+ mutex_lock(&wpriv->rsp_mutex);
|
|
|
+ if (wpriv->rsp_cnt) {
|
|
|
+ wpriv->rsp_cnt--;
|
|
|
+ dev_dbg(wpriv->dev, "%s: read from buffer %d\n",
|
|
|
+ __func__, wpriv->rsp_cnt);
|
|
|
+
|
|
|
+ rsp = &wpriv->rsp[wpriv->rsp_cnt];
|
|
|
+ if (count < rsp->buf_size) {
|
|
|
+ ret1 = copy_to_user(buf, &rsp->buf, count);
|
|
|
+ /* Return the number of bytes copied */
|
|
|
+ ret = count;
|
|
|
+ } else {
|
|
|
+ ret1 = copy_to_user(buf, &rsp->buf, rsp->buf_size);
|
|
|
+ /* Return the number of bytes copied */
|
|
|
+ ret = rsp->buf_size;
|
|
|
+ }
|
|
|
+
|
|
|
+ if (ret1) {
|
|
|
+ mutex_unlock(&wpriv->rsp_mutex);
|
|
|
+ dev_err(wpriv->dev, "%s: copy_to_user failed %d\n",
|
|
|
+ __func__, ret);
|
|
|
+ ret = -EFAULT;
|
|
|
+ goto done;
|
|
|
+ }
|
|
|
+ } else {
|
|
|
+ /*
|
|
|
+ * This will execute only if flush API is called or
|
|
|
+ * something wrong with ref_cnt
|
|
|
+ */
|
|
|
+ dev_dbg(wpriv->dev, "%s: resp count = %d\n", __func__,
|
|
|
+ wpriv->rsp_cnt);
|
|
|
+ ret = -EINVAL;
|
|
|
+ }
|
|
|
+ mutex_unlock(&wpriv->rsp_mutex);
|
|
|
+
|
|
|
+done:
|
|
|
+ return ret;
|
|
|
+}
|
|
|
+
|
|
|
+/*
|
|
|
+ * wdsp_glink_write - Write API to receive the data from userspace
|
|
|
+ * file: Pointer to the file structure
|
|
|
+ * buf: Pointer to the userspace buffer
|
|
|
+ * count: Number bytes to read from the file
|
|
|
+ * ppos: Pointer to the position into the file
|
|
|
+ */
|
|
|
+static ssize_t wdsp_glink_write(struct file *file, const char __user *buf,
|
|
|
+ size_t count, loff_t *ppos)
|
|
|
+{
|
|
|
+ int ret = 0, i, tx_buf_size;
|
|
|
+ struct wdsp_write_pkt *wpkt;
|
|
|
+ struct wdsp_cmd_pkt *cpkt;
|
|
|
+ struct wdsp_glink_tx_buf *tx_buf;
|
|
|
+ struct wdsp_glink_priv *wpriv;
|
|
|
+ size_t pkt_max_size;
|
|
|
+
|
|
|
+ wpriv = (struct wdsp_glink_priv *)file->private_data;
|
|
|
+ if (!wpriv) {
|
|
|
+ pr_err("%s: Invalid private data\n", __func__);
|
|
|
+ ret = -EINVAL;
|
|
|
+ goto done;
|
|
|
+ }
|
|
|
+
|
|
|
+ if ((count < WDSP_WRITE_PKT_SIZE) ||
|
|
|
+ (count > WDSP_MAX_WRITE_SIZE)) {
|
|
|
+ dev_err(wpriv->dev, "%s: Invalid count = %zd\n",
|
|
|
+ __func__, count);
|
|
|
+ ret = -EINVAL;
|
|
|
+ goto done;
|
|
|
+ }
|
|
|
+
|
|
|
+ dev_dbg(wpriv->dev, "%s: count = %zd\n", __func__, count);
|
|
|
+
|
|
|
+ tx_buf_size = count + sizeof(struct wdsp_glink_tx_buf);
|
|
|
+ tx_buf = vzalloc(tx_buf_size);
|
|
|
+ if (!tx_buf) {
|
|
|
+ ret = -ENOMEM;
|
|
|
+ goto done;
|
|
|
+ }
|
|
|
+
|
|
|
+ ret = copy_from_user(tx_buf->buf, buf, count);
|
|
|
+ if (ret) {
|
|
|
+ dev_err(wpriv->dev, "%s: copy_from_user failed %d\n",
|
|
|
+ __func__, ret);
|
|
|
+ ret = -EFAULT;
|
|
|
+ goto free_buf;
|
|
|
+ }
|
|
|
+
|
|
|
+ wpkt = (struct wdsp_write_pkt *)tx_buf->buf;
|
|
|
+ switch (wpkt->pkt_type) {
|
|
|
+ case WDSP_REG_PKT:
|
|
|
+ if (count < (WDSP_WRITE_PKT_SIZE + WDSP_REG_PKT_SIZE +
|
|
|
+ WDSP_CH_CFG_SIZE)) {
|
|
|
+ dev_err(wpriv->dev, "%s: Invalid reg pkt size = %zd\n",
|
|
|
+ __func__, count);
|
|
|
+ ret = -EINVAL;
|
|
|
+ goto free_buf;
|
|
|
+ }
|
|
|
+ ret = wdsp_glink_ch_info_init(wpriv,
|
|
|
+ (struct wdsp_reg_pkt *)wpkt->payload,
|
|
|
+ count);
|
|
|
+ if (ret < 0)
|
|
|
+ dev_err(wpriv->dev, "%s: glink register failed, ret = %d\n",
|
|
|
+ __func__, ret);
|
|
|
+ vfree(tx_buf);
|
|
|
+ break;
|
|
|
+ case WDSP_READY_PKT:
|
|
|
+ ret = wait_event_timeout(wpriv->link_state_wait,
|
|
|
+ (wpriv->glink_state.link_state ==
|
|
|
+ GLINK_LINK_STATE_UP),
|
|
|
+ msecs_to_jiffies(TIMEOUT_MS));
|
|
|
+ if (!ret) {
|
|
|
+ dev_err(wpriv->dev, "%s: Link state wait timeout\n",
|
|
|
+ __func__);
|
|
|
+ ret = -ETIMEDOUT;
|
|
|
+ goto free_buf;
|
|
|
+ }
|
|
|
+ ret = 0;
|
|
|
+ vfree(tx_buf);
|
|
|
+ break;
|
|
|
+ case WDSP_CMD_PKT:
|
|
|
+ if (count <= (WDSP_WRITE_PKT_SIZE + WDSP_CMD_PKT_SIZE)) {
|
|
|
+ dev_err(wpriv->dev, "%s: Invalid cmd pkt size = %zd\n",
|
|
|
+ __func__, count);
|
|
|
+ ret = -EINVAL;
|
|
|
+ goto free_buf;
|
|
|
+ }
|
|
|
+ mutex_lock(&wpriv->glink_mutex);
|
|
|
+ if (wpriv->glink_state.link_state == GLINK_LINK_STATE_DOWN) {
|
|
|
+ mutex_unlock(&wpriv->glink_mutex);
|
|
|
+ dev_err(wpriv->dev, "%s: Link state is Down\n",
|
|
|
+ __func__);
|
|
|
+
|
|
|
+ ret = -ENETRESET;
|
|
|
+ goto free_buf;
|
|
|
+ }
|
|
|
+ mutex_unlock(&wpriv->glink_mutex);
|
|
|
+ cpkt = (struct wdsp_cmd_pkt *)wpkt->payload;
|
|
|
+ pkt_max_size = sizeof(struct wdsp_write_pkt) +
|
|
|
+ sizeof(struct wdsp_cmd_pkt) +
|
|
|
+ cpkt->payload_size;
|
|
|
+ if (count < pkt_max_size) {
|
|
|
+ dev_err(wpriv->dev, "%s: Invalid cmd pkt count = %zd, pkt_size = %zd\n",
|
|
|
+ __func__, count, pkt_max_size);
|
|
|
+ ret = -EINVAL;
|
|
|
+ goto free_buf;
|
|
|
+ }
|
|
|
+ dev_dbg(wpriv->dev, "%s: requested ch_name: %s, pkt_size: %zd\n",
|
|
|
+ __func__, cpkt->ch_name, pkt_max_size);
|
|
|
+ for (i = 0; i < wpriv->no_of_channels; i++) {
|
|
|
+ if (wpriv->ch && wpriv->ch[i] &&
|
|
|
+ (!strcmp(cpkt->ch_name,
|
|
|
+ wpriv->ch[i]->ch_cfg.name))) {
|
|
|
+ tx_buf->ch = wpriv->ch[i];
|
|
|
+ break;
|
|
|
+ }
|
|
|
+ }
|
|
|
+ if (!tx_buf->ch) {
|
|
|
+ dev_err(wpriv->dev, "%s: Failed to get glink channel\n",
|
|
|
+ __func__);
|
|
|
+ ret = -EINVAL;
|
|
|
+ goto free_buf;
|
|
|
+ }
|
|
|
+
|
|
|
+ ret = wait_event_timeout(tx_buf->ch->ch_connect_wait,
|
|
|
+ (tx_buf->ch->channel_state ==
|
|
|
+ GLINK_CONNECTED),
|
|
|
+ msecs_to_jiffies(TIMEOUT_MS));
|
|
|
+ if (!ret) {
|
|
|
+ dev_err(wpriv->dev, "%s: glink channel %s is not in connected state %d\n",
|
|
|
+ __func__, tx_buf->ch->ch_cfg.name,
|
|
|
+ tx_buf->ch->channel_state);
|
|
|
+ ret = -ETIMEDOUT;
|
|
|
+ goto free_buf;
|
|
|
+ }
|
|
|
+ ret = 0;
|
|
|
+
|
|
|
+ INIT_WORK(&tx_buf->tx_work, wdsp_glink_tx_buf_work);
|
|
|
+ queue_work(wpriv->work_queue, &tx_buf->tx_work);
|
|
|
+ break;
|
|
|
+ default:
|
|
|
+ dev_err(wpriv->dev, "%s: Invalid packet type\n", __func__);
|
|
|
+ ret = -EINVAL;
|
|
|
+ vfree(tx_buf);
|
|
|
+ break;
|
|
|
+ }
|
|
|
+ goto done;
|
|
|
+
|
|
|
+free_buf:
|
|
|
+ vfree(tx_buf);
|
|
|
+
|
|
|
+done:
|
|
|
+ return ret;
|
|
|
+}
|
|
|
+
|
|
|
+/*
|
|
|
+ * wdsp_glink_open - Open API to initialize private data
|
|
|
+ * inode: Pointer to the inode structure
|
|
|
+ * file: Pointer to the file structure
|
|
|
+ */
|
|
|
+static int wdsp_glink_open(struct inode *inode, struct file *file)
|
|
|
+{
|
|
|
+ int ret = 0;
|
|
|
+ struct wdsp_glink_priv *wpriv;
|
|
|
+ struct wdsp_glink_dev *wdev;
|
|
|
+
|
|
|
+ if (!inode->i_cdev) {
|
|
|
+ pr_err("%s: cdev is NULL\n", __func__);
|
|
|
+ ret = -EINVAL;
|
|
|
+ goto done;
|
|
|
+ }
|
|
|
+ wdev = container_of(inode->i_cdev, struct wdsp_glink_dev, cdev);
|
|
|
+
|
|
|
+ wpriv = kzalloc(sizeof(struct wdsp_glink_priv), GFP_KERNEL);
|
|
|
+ if (!wpriv) {
|
|
|
+ ret = -ENOMEM;
|
|
|
+ goto done;
|
|
|
+ }
|
|
|
+ wpriv->dev = wdev->dev;
|
|
|
+ wpriv->work_queue = create_singlethread_workqueue("wdsp_glink_wq");
|
|
|
+ if (!wpriv->work_queue) {
|
|
|
+ dev_err(wpriv->dev, "%s: Error creating wdsp_glink_wq\n",
|
|
|
+ __func__);
|
|
|
+ ret = -EINVAL;
|
|
|
+ goto err_wq;
|
|
|
+ }
|
|
|
+
|
|
|
+ init_completion(&wpriv->rsp_complete);
|
|
|
+ init_waitqueue_head(&wpriv->link_state_wait);
|
|
|
+ mutex_init(&wpriv->rsp_mutex);
|
|
|
+ mutex_init(&wpriv->glink_mutex);
|
|
|
+ file->private_data = wpriv;
|
|
|
+
|
|
|
+ goto done;
|
|
|
+
|
|
|
+err_wq:
|
|
|
+ kfree(wpriv);
|
|
|
+
|
|
|
+done:
|
|
|
+ return ret;
|
|
|
+}
|
|
|
+
|
|
|
+/*
|
|
|
+ * wdsp_glink_flush - Flush API to unblock read.
|
|
|
+ * file: Pointer to the file structure
|
|
|
+ * id: Lock owner ID
|
|
|
+ */
|
|
|
+static int wdsp_glink_flush(struct file *file, fl_owner_t id)
|
|
|
+{
|
|
|
+ struct wdsp_glink_priv *wpriv;
|
|
|
+
|
|
|
+ wpriv = (struct wdsp_glink_priv *)file->private_data;
|
|
|
+ if (!wpriv) {
|
|
|
+ pr_err("%s: Invalid private data\n", __func__);
|
|
|
+ return -EINVAL;
|
|
|
+ }
|
|
|
+
|
|
|
+ complete(&wpriv->rsp_complete);
|
|
|
+
|
|
|
+ return 0;
|
|
|
+}
|
|
|
+
|
|
|
+/*
|
|
|
+ * wdsp_glink_release - Release API to clean up resources.
|
|
|
+ * Whenever a file structure is shared across multiple threads,
|
|
|
+ * release won't be invoked until all copies are closed
|
|
|
+ * (file->f_count.counter should be 0). If we need to flush pending
|
|
|
+ * data when any copy is closed, you should implement the flush method.
|
|
|
+ *
|
|
|
+ * inode: Pointer to the inode structure
|
|
|
+ * file: Pointer to the file structure
|
|
|
+ */
|
|
|
+static int wdsp_glink_release(struct inode *inode, struct file *file)
|
|
|
+{
|
|
|
+ int i, ret = 0;
|
|
|
+ struct wdsp_glink_priv *wpriv;
|
|
|
+
|
|
|
+ wpriv = (struct wdsp_glink_priv *)file->private_data;
|
|
|
+ if (!wpriv) {
|
|
|
+ pr_err("%s: Invalid private data\n", __func__);
|
|
|
+ ret = -EINVAL;
|
|
|
+ goto done;
|
|
|
+ }
|
|
|
+
|
|
|
+ if (wpriv->glink_state.handle)
|
|
|
+ glink_unregister_link_state_cb(wpriv->glink_state.handle);
|
|
|
+
|
|
|
+ flush_workqueue(wpriv->work_queue);
|
|
|
+ destroy_workqueue(wpriv->work_queue);
|
|
|
+
|
|
|
+ /*
|
|
|
+ * Clean up glink channel memory in channel state
|
|
|
+ * callback only if close channels are called from here.
|
|
|
+ */
|
|
|
+ if (wpriv->ch) {
|
|
|
+ for (i = 0; i < wpriv->no_of_channels; i++) {
|
|
|
+ if (wpriv->ch[i]) {
|
|
|
+ wpriv->ch[i]->free_mem = true;
|
|
|
+ /*
|
|
|
+ * Channel handle NULL means channel is already
|
|
|
+ * closed. Free the channel memory here itself.
|
|
|
+ */
|
|
|
+ if (!wpriv->ch[i]->handle) {
|
|
|
+ kfree(wpriv->ch[i]);
|
|
|
+ wpriv->ch[i] = NULL;
|
|
|
+ } else {
|
|
|
+ wdsp_glink_close_ch(wpriv->ch[i]);
|
|
|
+ }
|
|
|
+ }
|
|
|
+ }
|
|
|
+
|
|
|
+ kfree(wpriv->ch);
|
|
|
+ wpriv->ch = NULL;
|
|
|
+ }
|
|
|
+
|
|
|
+ mutex_destroy(&wpriv->glink_mutex);
|
|
|
+ mutex_destroy(&wpriv->rsp_mutex);
|
|
|
+ kfree(wpriv);
|
|
|
+ file->private_data = NULL;
|
|
|
+
|
|
|
+done:
|
|
|
+ return ret;
|
|
|
+}
|
|
|
+
|
|
|
+static const struct file_operations wdsp_glink_fops = {
|
|
|
+ .owner = THIS_MODULE,
|
|
|
+ .open = wdsp_glink_open,
|
|
|
+ .read = wdsp_glink_read,
|
|
|
+ .write = wdsp_glink_write,
|
|
|
+ .flush = wdsp_glink_flush,
|
|
|
+ .release = wdsp_glink_release,
|
|
|
+};
|
|
|
+
|
|
|
+/*
|
|
|
+ * wdsp_glink_probe - Driver probe to expose char device
|
|
|
+ * pdev: Pointer to device tree data.
|
|
|
+ */
|
|
|
+static int wdsp_glink_probe(struct platform_device *pdev)
|
|
|
+{
|
|
|
+ int ret;
|
|
|
+ struct wdsp_glink_dev *wdev;
|
|
|
+
|
|
|
+ wdev = devm_kzalloc(&pdev->dev, sizeof(*wdev), GFP_KERNEL);
|
|
|
+ if (!wdev) {
|
|
|
+ ret = -ENOMEM;
|
|
|
+ goto done;
|
|
|
+ }
|
|
|
+
|
|
|
+ ret = alloc_chrdev_region(&wdev->dev_num, 0, MINOR_NUMBER_COUNT,
|
|
|
+ WDSP_GLINK_DRIVER_NAME);
|
|
|
+ if (ret < 0) {
|
|
|
+ dev_err(&pdev->dev, "%s: Failed to alloc char dev, err = %d\n",
|
|
|
+ __func__, ret);
|
|
|
+ goto err_chrdev;
|
|
|
+ }
|
|
|
+
|
|
|
+ wdev->cls = class_create(THIS_MODULE, WDSP_GLINK_DRIVER_NAME);
|
|
|
+ if (IS_ERR(wdev->cls)) {
|
|
|
+ ret = PTR_ERR(wdev->cls);
|
|
|
+ dev_err(&pdev->dev, "%s: Failed to create class, err = %d\n",
|
|
|
+ __func__, ret);
|
|
|
+ goto err_class;
|
|
|
+ }
|
|
|
+
|
|
|
+ wdev->dev = device_create(wdev->cls, NULL, wdev->dev_num,
|
|
|
+ NULL, WDSP_GLINK_DRIVER_NAME);
|
|
|
+ if (IS_ERR(wdev->dev)) {
|
|
|
+ ret = PTR_ERR(wdev->dev);
|
|
|
+ dev_err(&pdev->dev, "%s: Failed to create device, err = %d\n",
|
|
|
+ __func__, ret);
|
|
|
+ goto err_dev_create;
|
|
|
+ }
|
|
|
+
|
|
|
+ cdev_init(&wdev->cdev, &wdsp_glink_fops);
|
|
|
+ ret = cdev_add(&wdev->cdev, wdev->dev_num, MINOR_NUMBER_COUNT);
|
|
|
+ if (ret < 0) {
|
|
|
+ dev_err(&pdev->dev, "%s: Failed to register char dev, err = %d\n",
|
|
|
+ __func__, ret);
|
|
|
+ goto err_cdev_add;
|
|
|
+ }
|
|
|
+ platform_set_drvdata(pdev, wdev);
|
|
|
+ goto done;
|
|
|
+
|
|
|
+err_cdev_add:
|
|
|
+ device_destroy(wdev->cls, wdev->dev_num);
|
|
|
+
|
|
|
+err_dev_create:
|
|
|
+ class_destroy(wdev->cls);
|
|
|
+
|
|
|
+err_class:
|
|
|
+ unregister_chrdev_region(0, MINOR_NUMBER_COUNT);
|
|
|
+
|
|
|
+err_chrdev:
|
|
|
+ devm_kfree(&pdev->dev, wdev);
|
|
|
+
|
|
|
+done:
|
|
|
+ return ret;
|
|
|
+}
|
|
|
+
|
|
|
+/*
|
|
|
+ * wdsp_glink_remove - Driver remove to handle cleanup
|
|
|
+ * pdev: Pointer to device tree data.
|
|
|
+ */
|
|
|
+static int wdsp_glink_remove(struct platform_device *pdev)
|
|
|
+{
|
|
|
+ struct wdsp_glink_dev *wdev = platform_get_drvdata(pdev);
|
|
|
+
|
|
|
+ if (wdev) {
|
|
|
+ cdev_del(&wdev->cdev);
|
|
|
+ device_destroy(wdev->cls, wdev->dev_num);
|
|
|
+ class_destroy(wdev->cls);
|
|
|
+ unregister_chrdev_region(0, MINOR_NUMBER_COUNT);
|
|
|
+ devm_kfree(&pdev->dev, wdev);
|
|
|
+ } else {
|
|
|
+ dev_err(&pdev->dev, "%s: Invalid device data\n", __func__);
|
|
|
+ }
|
|
|
+
|
|
|
+ return 0;
|
|
|
+}
|
|
|
+
|
|
|
+static const struct of_device_id wdsp_glink_of_match[] = {
|
|
|
+ {.compatible = "qcom,wcd-dsp-glink"},
|
|
|
+ { }
|
|
|
+};
|
|
|
+MODULE_DEVICE_TABLE(of, wdsp_glink_of_match);
|
|
|
+
|
|
|
+static struct platform_driver wdsp_glink_driver = {
|
|
|
+ .probe = wdsp_glink_probe,
|
|
|
+ .remove = wdsp_glink_remove,
|
|
|
+ .driver = {
|
|
|
+ .name = WDSP_GLINK_DRIVER_NAME,
|
|
|
+ .owner = THIS_MODULE,
|
|
|
+ .of_match_table = wdsp_glink_of_match,
|
|
|
+ },
|
|
|
+};
|
|
|
+
|
|
|
+module_platform_driver(wdsp_glink_driver);
|
|
|
+
|
|
|
+MODULE_DESCRIPTION("SoC WCD_DSP GLINK Driver");
|
|
|
+MODULE_LICENSE("GPL v2");
|
Laxminath Kasam