aml-canvas.h

// Copyright 2018 The Fuchsia Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#pragma once

#include <ddk/mmio-buffer.h>
#include <ddk/device.h>
#include <ddk/platform-defs.h>
#include <ddk/protocol/amlogiccanvas.h>
#include <ddk/protocol/platform/bus.h>
#include <ddk/protocol/platform/device.h>
#include <hw/reg.h>
#include <threads.h>

#define NUM_CANVAS_ENTRIES 256
#define CANVAS_BYTE_STRIDE 32

#define IS_ALIGNED(a, b) (!(((uintptr_t)(a)) & (((uintptr_t)(b))-1)))

#define CANVAS_ERROR(fmt, ...) zxlogf(ERROR, "[%s %d]" fmt, __func__, __LINE__, ##__VA_ARGS__)
#define CANVAS_INFO(fmt, ...) zxlogf(INFO, "[%s %d]" fmt, __func__, __LINE__, ##__VA_ARGS__)

#define READ32_DMC_REG(a)                readl(canvas->dmc_regs.vaddr + a)
#define WRITE32_DMC_REG(a, v)            writel(v, canvas->dmc_regs.vaddr + a)

#define DMC_CAV_LUT_DATAL                   (0x12 << 2)
#define DMC_CAV_LUT_DATAH                   (0x13 << 2)
#define DMC_CAV_LUT_ADDR                    (0x14 << 2)

#define DMC_CAV_ADDR_LMASK                  0x1fffffff
#define DMC_CAV_WIDTH_LMASK                 0x7
#define DMC_CAV_WIDTH_LWID                  3
#define DMC_CAV_WIDTH_LBIT                  29

#define DMC_CAV_WIDTH_HMASK                 0x1ff
#define DMC_CAV_WIDTH_HBIT                  0
#define DMC_CAV_HEIGHT_MASK                 0x1fff
#define DMC_CAV_HEIGHT_BIT                  9

#define DMC_CAV_BLKMODE_MASK                3
#define DMC_CAV_BLKMODE_BIT                 24

#define DMC_CAV_ENDIANNESS_BIT              26
#define DMC_CAV_ENDIANNESS_MASK             0xf

#define DMC_CAV_LUT_ADDR_INDEX_MASK         0x7
#define DMC_CAV_LUT_ADDR_RD_EN              (1 << 8)
#define DMC_CAV_LUT_ADDR_WR_EN              (2 << 8)

#define DMC_CAV_YWRAP                       (1<<23)
#define DMC_CAV_XWRAP                       (1<<22)

// Proxy request IDs.
enum {
    CANVAS_CONFIG,
    CANVAS_FREE,
};

// Proxy request.
typedef struct {
    platform_proxy_req_t header;
    canvas_info_t info;
    size_t offset;
    uint8_t idx;
} rpc_canvas_req_t;

// Proxy response.
typedef struct {
    platform_proxy_rsp_t header;
    uint8_t idx;
} rpc_canvas_rsp_t;

// Context for driver implementation.
typedef struct {
    zx_device_t* zxdev;
    pdev_protocol_t pdev;
    mmio_buffer_t dmc_regs;
    mtx_t lock;
    amlogic_canvas_protocol_t canvas;
    zx_handle_t bti;
    zx_handle_t pmt_handle[NUM_CANVAS_ENTRIES];
} aml_canvas_t;

// Context for driver proxy.
typedef struct {
    zx_device_t* zxdev;
    platform_proxy_protocol_t proxy;
    amlogic_canvas_protocol_t canvas;
} aml_canvas_proxy_t;