233 lines
6 KiB
C
233 lines
6 KiB
C
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/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* MTK USB Offload Driver
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* *
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* Copyright (c) 2022 MediaTek Inc.
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* Author: Jeremy Chou <jeremy.chou@mediatek.com>
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*/
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#ifndef __USB_OFFLOAD_H__
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#define __USB_OFFLOAD_H__
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#include <linux/types.h>
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#include <sound/asound.h>
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#include <linux/module.h>
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#include <linux/slab.h>
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#include <linux/errno.h>
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#include <linux/debugfs.h>
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#include <linux/usb/audio.h>
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#include <linux/usb/audio-v2.h>
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#include <linux/usb/audio-v3.h>
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#include <linux/uaccess.h>
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#include <sound/pcm.h>
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#include <sound/core.h>
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#include <sound/asound.h>
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#include <linux/usb.h>
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#include <linux/iommu.h>
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#include <linux/dma-mapping.h>
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#define MIN_USB_OFFLOAD_SHIFT (8)
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#define MIN_USB_OFFLOAD_POOL_SIZE (1 << MIN_USB_OFFLOAD_SHIFT)
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#define BUF_CTX_SIZE 31
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#define BUF_SEG_SIZE ((15 * 2 + 1) * 2)
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#define USB_OFFLOAD_TRBS_PER_SEGMENT 256
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#define USB_OFFLOAD_TRB_SEGMENT_SIZE (USB_OFFLOAD_TRBS_PER_SEGMENT*16)
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#define USB_OFFLOAD_USE_SRAM 0
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#define SRAM_ADDR 0x11052000
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#define SRAM_TOTAL_SIZE 0x12000
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#define SRAM_TR_SIZE 0x4000
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#define SRAM_TR_OFST 0x20C0
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struct usb_offload_mem_info {
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unsigned long long phy_addr;
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unsigned long long va_addr;
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unsigned long long size;
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unsigned char *vir_addr;
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};
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struct usb_offload_buffer {
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/* -- DMA -- */
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unsigned char *dma_area; /* DMA area */
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dma_addr_t dma_addr; /* physical bus address (not accessible from main CPU) */
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size_t dma_bytes; /* size of DMA area */
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bool allocated;
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};
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enum usb_offload_mem_id {
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USB_OFFLOAD_MEM_DRAM_ID = 0,
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USB_OFFLOAD_MEM_SRAM_ID = 1,
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USB_OFFLOAD_MEM_NUM,
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};
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enum {
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ENABLE_STREAM,
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DISABLE_STREAM,
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};
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#define USB_OFFLOAD_IOC_MAGIC 'U'
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/* Enable/Disable USB Offload */
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#define USB_OFFLOAD_INIT_ADSP _IOW(USB_OFFLOAD_IOC_MAGIC, 0, int)
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/* Enable USB Stream */
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#define USB_OFFLOAD_ENABLE_STREAM _IOW(USB_OFFLOAD_IOC_MAGIC, 1, unsigned int)
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/* Disable USB Stream */
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#define USB_OFFLOAD_DISABLE_STREAM _IOW(USB_OFFLOAD_IOC_MAGIC, 2, unsigned int)
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#define BUS_INTERVAL_FULL_SPEED 1000 /* in us */
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#define BUS_INTERVAL_HIGHSPEED_AND_ABOVE 125 /* in us */
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#define MAX_BINTERVAL_ISOC_EP 16
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#define DEV_RELEASE_WAIT_TIMEOUT 10000 /* in ms */
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enum usb_audio_stream_status {
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USB_AUDIO_STREAM_STATUS_ENUM_MIN_VAL = INT_MIN,
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USB_AUDIO_STREAM_REQ_START = 0,
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USB_AUDIO_STREAM_REQ_STOP = 1,
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USB_AUDIO_STREAM_STATUS_ENUM_MAX_VAL = INT_MAX,
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};
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enum usb_audio_device_speed {
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USB_AUDIO_DEVICE_SPEED_ENUM_MIN_VAL = INT_MIN,
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USB_AUDIO_DEVICE_SPEED_INVALID = 0,
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USB_AUDIO_DEVICE_SPEED_LOW = 1,
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USB_AUDIO_DEVICE_SPEED_FULL = 2,
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USB_AUDIO_DEVICE_SPEED_HIGH = 3,
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USB_AUDIO_DEVICE_SPEED_SUPER = 4,
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USB_AUDIO_DEVICE_SPEED_SUPER_PLUS = 5,
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USB_AUDIO_DEVICE_SPEED_ENUM_MAX_VAL = INT_MAX,
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};
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enum ssusb_offload_mode {
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SSUSB_OFFLOAD_MODE_NONE = 0,
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SSUSB_OFFLOAD_MODE_D,
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SSUSB_OFFLOAD_MODE_S,
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};
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/* struct ssusb_offload */
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struct ssusb_offload {
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struct device *dev;
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int (*get_mode)(struct device *dev);
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};
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struct mem_info_xhci {
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bool use_sram;
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unsigned int xhci_data_addr;
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unsigned int xhci_data_size;
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};
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struct usb_audio_stream_info {
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unsigned char enable;
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unsigned char pcm_card_num;
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unsigned char pcm_dev_num;
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unsigned char direction;
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unsigned int bit_depth;
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unsigned int number_of_ch;
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unsigned int bit_rate;
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unsigned char service_interval_valid;
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unsigned int service_interval;
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unsigned char xhc_irq_period_ms;
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unsigned char xhc_urb_num;
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unsigned char dram_size;
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unsigned char dram_cnt;
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unsigned char start_thld;
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unsigned char stop_thld;
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unsigned int pcm_size;
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snd_pcm_format_t audio_format;
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};
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struct usb_audio_stream_msg {
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unsigned char status_valid;
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enum usb_audio_stream_status status;
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unsigned char internal_status_valid;
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unsigned int internal_status;
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unsigned char slot_id_valid;
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unsigned int slot_id;
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unsigned char usb_token_valid;
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unsigned int usb_token;
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unsigned char pcm_card_num_valid;
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unsigned char pcm_card_num;
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unsigned char pcm_dev_num_valid;
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unsigned char pcm_dev_num;
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unsigned char direction_valid;
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unsigned char direction;
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unsigned char std_as_opr_intf_desc_valid;
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struct usb_interface_descriptor std_as_opr_intf_desc;
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unsigned char std_as_data_ep_desc_valid;
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struct usb_endpoint_descriptor std_as_data_ep_desc;
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unsigned char std_as_sync_ep_desc_valid;
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struct usb_endpoint_descriptor std_as_sync_ep_desc;
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unsigned char usb_audio_spec_revision_valid;
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u16 usb_audio_spec_revision;
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unsigned char data_path_delay_valid;
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unsigned char data_path_delay;
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unsigned char usb_audio_subslot_size_valid;
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unsigned char usb_audio_subslot_size;
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unsigned char interrupter_num_valid;
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unsigned char interrupter_num;
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unsigned char speed_info_valid;
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enum usb_audio_device_speed speed_info;
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unsigned char controller_num_valid;
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unsigned char controller_num;
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struct usb_audio_stream_info uainfo;
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};
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struct intf_info {
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unsigned int data_ep_pipe;
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unsigned int sync_ep_pipe;
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u8 *xfer_buf;
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u8 intf_num;
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u8 pcm_card_num;
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u8 pcm_dev_num;
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u8 direction;
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bool in_use;
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};
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struct usb_audio_dev {
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struct usb_device *udev;
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/* audio control interface */
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struct usb_host_interface *ctrl_intf;
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unsigned int card_num;
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unsigned int usb_core_id;
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atomic_t in_use;
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struct kref kref;
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wait_queue_head_t disconnect_wq;
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/* interface specific */
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int num_intf;
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struct intf_info *info;
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};
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struct usb_offload_dev {
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struct device *dev;
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struct xhci_hcd *xhci;
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u32 intr_num;
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unsigned long card_slot;
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unsigned int card_num;
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enum usb_offload_mem_id mem_id;
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bool default_use_sram;
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int current_mem_mode;
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bool is_streaming;
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bool tx_streaming;
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bool rx_streaming;
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bool adsp_inited;
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bool connected;
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bool opened;
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bool adsp_exception;
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bool adsp_ready;
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struct ssusb_offload *ssusb_offload_notify;
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struct mutex dev_lock;
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};
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extern int mtk_usb_offload_allocate_mem(struct usb_offload_buffer *buf,
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unsigned int size, int align, enum usb_offload_mem_id mem_id);
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extern int mtk_usb_offload_free_mem(struct usb_offload_buffer *buf, enum usb_offload_mem_id mem_id);
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extern int ssusb_offload_register(struct ssusb_offload *offload);
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extern int ssusb_offload_unregister(struct device *dev);
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extern bool usb_offload_ready(void);
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#endif /* __USB_OFFLOAD_H__ */
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