/*
 * File      : syscall_write.c
 * This file is part of RT-Thread RTOS
 * COPYRIGHT (C) 2006 - 2015, RT-Thread Development Team
 *
 *  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.,
 *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Change Logs:
 * Date           Author       Notes
 * 2017-10-10     Tanek        first version
 */

#include <rtthread.h>
#include <rthw.h>
#include <drivers/mmcsd_core.h>

#include <board.h>
#include <fsl_usdhc.h>
#include <fsl_gpio.h>

#include <finsh.h>

#define RT_USING_SDIO1
#define RT_USING_SDIO2

//#define DEBUG

#ifdef DEBUG
static int enable_log = 1;

#define MMCSD_DGB(fmt, ...)                 \
    do                                      \
    {                                       \
        if (enable_log)                     \
        {                                   \
            rt_kprintf(fmt, ##__VA_ARGS__); \
        }                                   \
    } while (0)
#else
#define MMCSD_DGB(fmt, ...)
#endif
        
#define CACHE_LINESIZE              (32)

#define USDHC_ADMA_TABLE_WORDS      (8U)        /* define the ADMA descriptor table length */
#define USDHC_ADMA2_ADDR_ALIGN      (4U)        /* define the ADMA2 descriptor table addr align size */
#define IMXRT_MAX_FREQ              (400 * 1000u)
    
#define USDHC_ADMA_TABLE_WORDS      (8U)        /* define the ADMA descriptor table length */
#define USDHC_ADMA2_ADDR_ALIGN      (4U)        /* define the ADMA2 descriptor table addr align size */
#define USDHC_READ_BURST_LEN        (8U)        /*!< number of words USDHC read in a single burst */
#define USDHC_WRITE_BURST_LEN       (8U)        /*!< number of words USDHC write in a single burst */
#define USDHC_DATA_TIMEOUT          (0xFU)      /*!< data timeout counter value */

/* Read/write watermark level. The bigger value indicates DMA has higher read/write performance. */
#define USDHC_READ_WATERMARK_LEVEL  (0x80U)
#define USDHC_WRITE_WATERMARK_LEVEL (0x80U)

/* DMA mode */
#define USDHC_DMA_MODE kUSDHC_DmaModeAdma2

/* Endian mode. */
#define USDHC_ENDIAN_MODE kUSDHC_EndianModeLittle
        
ALIGN(USDHC_ADMA2_ADDR_ALIGN) uint32_t g_usdhcAdma2Table[USDHC_ADMA_TABLE_WORDS] SECTION("NonCacheable");

struct imxrt_mmcsd {
	struct rt_mmcsd_host *host;
	struct rt_mmcsd_req *req;
	struct rt_mmcsd_cmd *cmd;
    
	struct rt_timer timer;
    
	rt_uint32_t *buf;
    
    //USDHC_Type *base;
    usdhc_host_t usdhc_host;
    clock_div_t usdhc_div;
    clock_ip_name_t ip_clock;
    
    uint32_t *usdhc_adma2_table;
};

static void _mmcsd_gpio_init(struct imxrt_mmcsd * mmcsd)
{
    gpio_pin_config_t sw_config;

    CLOCK_EnableClock(kCLOCK_Iomuxc);          /* iomuxc clock (iomuxc_clk_enable): 0x03u */
    
#ifdef RT_USING_SDIO1
    if (mmcsd->usdhc_host.base == USDHC1)
    {
        IOMUXC_SetPinMux(IOMUXC_GPIO_SD_B0_00_USDHC1_CMD,   0);
        IOMUXC_SetPinMux(IOMUXC_GPIO_SD_B0_01_USDHC1_CLK,   0);
        IOMUXC_SetPinMux(IOMUXC_GPIO_SD_B0_02_USDHC1_DATA0, 0);
        IOMUXC_SetPinMux(IOMUXC_GPIO_SD_B0_03_USDHC1_DATA1, 0);
        IOMUXC_SetPinMux(IOMUXC_GPIO_SD_B0_04_USDHC1_DATA2, 0);
        IOMUXC_SetPinMux(IOMUXC_GPIO_SD_B0_05_USDHC1_DATA3, 0);

        /* voltage select PIN */
        IOMUXC_SetPinMux(IOMUXC_GPIO_B1_14_USDHC1_VSELECT, 0);

         /* card detect PIN */
        IOMUXC_SetPinMux(IOMUXC_GPIO_B1_12_GPIO2_IO28, 0);
        /* power reset pin */
        IOMUXC_SetPinMux(IOMUXC_GPIO_AD_B0_05_GPIO1_IO05, 0);

        IOMUXC_SetPinConfig(IOMUXC_GPIO_SD_B0_00_USDHC1_CMD, IOMUXC_SW_PAD_CTL_PAD_SRE_MASK | IOMUXC_SW_PAD_CTL_PAD_PKE_MASK |
                                                           IOMUXC_SW_PAD_CTL_PAD_PUE_MASK | IOMUXC_SW_PAD_CTL_PAD_HYS_MASK |
                                                           IOMUXC_SW_PAD_CTL_PAD_SPEED(2) | IOMUXC_SW_PAD_CTL_PAD_PUS(1) |
                                                           IOMUXC_SW_PAD_CTL_PAD_DSE(1));
        IOMUXC_SetPinConfig(IOMUXC_GPIO_SD_B0_01_USDHC1_CLK, IOMUXC_SW_PAD_CTL_PAD_SRE_MASK | IOMUXC_SW_PAD_CTL_PAD_HYS_MASK |
                                                           IOMUXC_SW_PAD_CTL_PAD_SPEED(1) | IOMUXC_SW_PAD_CTL_PAD_PUS(1) |
                                                           IOMUXC_SW_PAD_CTL_PAD_DSE(1));
        IOMUXC_SetPinConfig(IOMUXC_GPIO_SD_B0_02_USDHC1_DATA0, IOMUXC_SW_PAD_CTL_PAD_SRE_MASK | IOMUXC_SW_PAD_CTL_PAD_PKE_MASK |
                                                               IOMUXC_SW_PAD_CTL_PAD_PUE_MASK |
                                                               IOMUXC_SW_PAD_CTL_PAD_HYS_MASK |
                                                               IOMUXC_SW_PAD_CTL_PAD_SPEED(2) |
                                                               IOMUXC_SW_PAD_CTL_PAD_PUS(1) | IOMUXC_SW_PAD_CTL_PAD_DSE(1));

        IOMUXC_SetPinConfig(IOMUXC_GPIO_SD_B0_03_USDHC1_DATA1, IOMUXC_SW_PAD_CTL_PAD_SRE_MASK | IOMUXC_SW_PAD_CTL_PAD_PKE_MASK |
                                                               IOMUXC_SW_PAD_CTL_PAD_PUE_MASK |
                                                               IOMUXC_SW_PAD_CTL_PAD_HYS_MASK |
                                                               IOMUXC_SW_PAD_CTL_PAD_SPEED(2) |
                                                               IOMUXC_SW_PAD_CTL_PAD_PUS(1) | IOMUXC_SW_PAD_CTL_PAD_DSE(1));

        IOMUXC_SetPinConfig(IOMUXC_GPIO_SD_B0_04_USDHC1_DATA2, IOMUXC_SW_PAD_CTL_PAD_SRE_MASK | IOMUXC_SW_PAD_CTL_PAD_PKE_MASK |
                                                               IOMUXC_SW_PAD_CTL_PAD_PUE_MASK |
                                                               IOMUXC_SW_PAD_CTL_PAD_HYS_MASK |
                                                               IOMUXC_SW_PAD_CTL_PAD_SPEED(2) |
                                                               IOMUXC_SW_PAD_CTL_PAD_PUS(1) | IOMUXC_SW_PAD_CTL_PAD_DSE(1));

        IOMUXC_SetPinConfig(IOMUXC_GPIO_SD_B0_05_USDHC1_DATA3, IOMUXC_SW_PAD_CTL_PAD_SRE_MASK | IOMUXC_SW_PAD_CTL_PAD_PKE_MASK |
                                                               IOMUXC_SW_PAD_CTL_PAD_PUE_MASK |
                                                               IOMUXC_SW_PAD_CTL_PAD_HYS_MASK |
                                                               IOMUXC_SW_PAD_CTL_PAD_SPEED(2) |
                                                               IOMUXC_SW_PAD_CTL_PAD_PUS(1) | IOMUXC_SW_PAD_CTL_PAD_DSE(1));

        /*voltage select pin*/
        IOMUXC_SetPinConfig(IOMUXC_GPIO_B1_14_USDHC1_VSELECT, IOMUXC_SW_PAD_CTL_PAD_SRE_MASK | IOMUXC_SW_PAD_CTL_PAD_PKE_MASK |
                                                               IOMUXC_SW_PAD_CTL_PAD_PUE_MASK |
                                                               IOMUXC_SW_PAD_CTL_PAD_HYS_MASK |
                                                               IOMUXC_SW_PAD_CTL_PAD_SPEED(2) |
                                                               IOMUXC_SW_PAD_CTL_PAD_PUS(1) | IOMUXC_SW_PAD_CTL_PAD_DSE(4));

        IOMUXC_SetPinConfig(IOMUXC_GPIO_B1_12_GPIO2_IO28, IOMUXC_SW_PAD_CTL_PAD_SRE_MASK | IOMUXC_SW_PAD_CTL_PAD_PKE_MASK |
                                                               IOMUXC_SW_PAD_CTL_PAD_PUE_MASK |
                                                               IOMUXC_SW_PAD_CTL_PAD_HYS_MASK |
                                                               IOMUXC_SW_PAD_CTL_PAD_SPEED(2) |
                                                               IOMUXC_SW_PAD_CTL_PAD_PUS(1) | IOMUXC_SW_PAD_CTL_PAD_DSE(1));
        
        sw_config.direction = kGPIO_DigitalOutput;
        sw_config.outputLogic = 0;
        sw_config.interruptMode = kGPIO_NoIntmode;

        GPIO_PinInit(GPIO1, 5U, &sw_config);
        GPIO_PinWrite(GPIO1, 5U, true);
    }
    else
#endif

#ifdef RT_USING_SDIO2
    if (mmcsd->usdhc_host.base == USDHC2)
    {
        // todo
    }
#endif
    
}

static void SDMMCHOST_ErrorRecovery(USDHC_Type *base)
{
    uint32_t status = 0U;
    /* get host present status */
    status = USDHC_GetPresentStatusFlags(base);
    /* check command inhibit status flag */
    if ((status & kUSDHC_CommandInhibitFlag) != 0U)
    {
        /* reset command line */
        USDHC_Reset(base, kUSDHC_ResetCommand, 1000U);
    }
    /* check data inhibit status flag */
    if ((status & kUSDHC_DataInhibitFlag) != 0U)
    {
        /* reset data line */
        USDHC_Reset(base, kUSDHC_ResetData, 1000U);
    }
}

static void _mmcsd_host_init(struct imxrt_mmcsd * mmcsd)
{
    usdhc_host_t *usdhc_host = &mmcsd->usdhc_host;
    
    /* Initializes SDHC. */
    usdhc_host->config.dataTimeout = USDHC_DATA_TIMEOUT;
    usdhc_host->config.endianMode = USDHC_ENDIAN_MODE;
    usdhc_host->config.readWatermarkLevel = USDHC_READ_WATERMARK_LEVEL;
    usdhc_host->config.writeWatermarkLevel = USDHC_WRITE_WATERMARK_LEVEL;
    usdhc_host->config.readBurstLen = USDHC_READ_BURST_LEN;
    usdhc_host->config.writeBurstLen = USDHC_WRITE_BURST_LEN;

    USDHC_Init(usdhc_host->base, &(usdhc_host->config));
}

static void _mmcsd_clk_init(struct imxrt_mmcsd * mmcsd)
{
    CLOCK_EnableClock(mmcsd->ip_clock);
    CLOCK_SetDiv(mmcsd->usdhc_div, 0U);
}

static void _mmcsd_isr_init(struct imxrt_mmcsd * mmcsd)
{
    //NVIC_SetPriority(USDHC1_IRQn, 5U);
}

static void _mmc_request(struct rt_mmcsd_host *host, struct rt_mmcsd_req *req)
{
    struct imxrt_mmcsd * mmcsd;
    struct rt_mmcsd_cmd * cmd;
    struct rt_mmcsd_data * data;
    status_t error;
    usdhc_adma_config_t dmaConfig;
    usdhc_transfer_t fsl_content = {0};
    usdhc_command_t fsl_command = {0};
    usdhc_data_t fsl_data = {0};
    rt_uint32_t * buf = NULL;

    RT_ASSERT(host != RT_NULL);
    RT_ASSERT(req != RT_NULL);
    
    mmcsd = (struct imxrt_mmcsd *)host->private_data;
    RT_ASSERT(mmcsd != RT_NULL);
    
    cmd = req->cmd;
    RT_ASSERT(cmd != RT_NULL);
    
    MMCSD_DGB("\tcmd->cmd_code: %02d, cmd->arg: %08x, cmd->flags: %08x --> ", cmd->cmd_code, cmd->arg, cmd->flags);
    
    data = cmd->data;
        
    memset(&dmaConfig, 0, sizeof(usdhc_adma_config_t));
    /* config adma */
    dmaConfig.dmaMode = USDHC_DMA_MODE;
    dmaConfig.burstLen = kUSDHC_EnBurstLenForINCR;
    dmaConfig.admaTable = mmcsd->usdhc_adma2_table;
    dmaConfig.admaTableWords = USDHC_ADMA_TABLE_WORDS;
    
    fsl_command.index = cmd->cmd_code;
    fsl_command.argument = cmd->arg;
    
    if (cmd->cmd_code == STOP_TRANSMISSION)
        fsl_command.type = kCARD_CommandTypeAbort;
    else
        fsl_command.type = kCARD_CommandTypeNormal;
    
    switch (cmd->flags & RESP_MASK)
    {
    case RESP_NONE:
        fsl_command.responseType = kCARD_ResponseTypeNone;
        break;
    case RESP_R1:
        fsl_command.responseType = kCARD_ResponseTypeR1;
        break;
    case RESP_R1B:
        fsl_command.responseType = kCARD_ResponseTypeR1b;
        break;
    case RESP_R2:
        fsl_command.responseType = kCARD_ResponseTypeR2;
        break;
    case RESP_R3:
        fsl_command.responseType = kCARD_ResponseTypeR3;
        break;
    case RESP_R4:
        fsl_command.responseType = kCARD_ResponseTypeR4;
        break;
    case RESP_R6:
        fsl_command.responseType = kCARD_ResponseTypeR6;
        break;
    case RESP_R7:
        fsl_command.responseType = kCARD_ResponseTypeR7;
        break;
    case RESP_R5:
        fsl_command.responseType = kCARD_ResponseTypeR5;
        break;
    /*
    case RESP_R5B:
        fsl_command.responseType = kCARD_ResponseTypeR5b;
        break;
    */
    default:
        RT_ASSERT(NULL);
    }
    
    // command type 
    /*
    switch (cmd->flags & CMD_MASK)
    {
    case CMD_AC:
        break;
    case CMD_ADTC:
        break;
    case CMD_BC:
        break;
    case CMD_BCR:
        break;
    }
    */
    
    fsl_command.flags = 0;
    //fsl_command.response
    //fsl_command.responseErrorFlags
    
    fsl_content.command = &fsl_command;
    
    if (data)
    {
        if (req->stop != NULL)
            fsl_data.enableAutoCommand12 = true;
        else
            fsl_data.enableAutoCommand12 = false;

        fsl_data.enableAutoCommand23 = false;

        fsl_data.enableIgnoreError = false;
        fsl_data.dataType = kUSDHC_TransferDataNormal;  //todo : update data type
        fsl_data.blockSize = data->blksize;  
        fsl_data.blockCount = data->blks;
        
        MMCSD_DGB(" blksize:%d, blks:%d ", fsl_data.blockSize, fsl_data.blockCount);
        
        if (((rt_uint32_t)data->buf & (CACHE_LINESIZE - 1)) ||         // align cache(32byte)
            ((rt_uint32_t)data->buf >  0x00000000 && (rt_uint32_t)data->buf < 0x00080000) /*||  // ITCM
            ((rt_uint32_t)data->buf >= 0x20000000 && (rt_uint32_t)data->buf < 0x20080000)*/)    // DTCM
        {
            
            buf = rt_malloc_align(fsl_data.blockSize * fsl_data.blockCount, CACHE_LINESIZE);
            RT_ASSERT(buf != RT_NULL);
            
            MMCSD_DGB(" malloc buf: %p, data->buf:%p, %d ", buf, data->buf, fsl_data.blockSize * fsl_data.blockCount);
        }

        
        if ((cmd->cmd_code == WRITE_BLOCK) || (cmd->cmd_code == WRITE_MULTIPLE_BLOCK))
        {
            if (buf)
            {
                MMCSD_DGB(" write(data->buf to buf) ");
                memcpy(buf, data->buf, fsl_data.blockSize * fsl_data.blockCount);
                fsl_data.txData = (uint32_t const *)buf;
            }
            else
            {
                fsl_data.txData = (uint32_t const *)data->buf;
            }
            
            fsl_data.rxData = NULL;            
        }
        else
        {
            if (buf)
            {
                fsl_data.rxData = (uint32_t *)buf;
            }
            else
            {
                fsl_data.rxData = (uint32_t *)data->buf;
            }
            
            fsl_data.txData = NULL;
        }
        
        fsl_content.data = &fsl_data;
    } 
    else
    {
        fsl_content.data = NULL;
    }
    
    error = USDHC_TransferBlocking(mmcsd->usdhc_host.base, &dmaConfig, &fsl_content);
    if (error == kStatus_Fail)
    {
        SDMMCHOST_ErrorRecovery(mmcsd->usdhc_host.base);
        MMCSD_DGB(" ***USDHC_TransferBlocking error: %d*** --> \n", error);
        cmd->err = -RT_ERROR;
    }
    
    if (buf)
    {
        if (fsl_data.rxData)
        {
            MMCSD_DGB("read copy buf to data->buf ");
            memcpy(data->buf, buf, fsl_data.blockSize * fsl_data.blockCount);
        }
    
        rt_free_align(buf);
    }
    
    if ((cmd->flags & RESP_MASK) == RESP_R2) 
    {
        cmd->resp[3] = fsl_command.response[0];
        cmd->resp[2] = fsl_command.response[1];
        cmd->resp[1] = fsl_command.response[2];
        cmd->resp[0] = fsl_command.response[3];
        MMCSD_DGB(" resp 0x%08X 0x%08X 0x%08X 0x%08X\n",
            cmd->resp[0], cmd->resp[1], cmd->resp[2], cmd->resp[3]);
    } 
    else
    {
        cmd->resp[0] = fsl_command.response[0];
        MMCSD_DGB(" resp 0x%08X\n", cmd->resp[0]);
    }
    
    mmcsd_req_complete(host);
    
    return;
}

static void _mmc_set_iocfg(struct rt_mmcsd_host *host, struct rt_mmcsd_io_cfg *io_cfg)
{
    
    struct imxrt_mmcsd * mmcsd;
    unsigned int usdhc_clk;
    unsigned int bus_width;
    uint32_t src_clk;
    
    RT_ASSERT(host != RT_NULL);
    RT_ASSERT(host->private_data != RT_NULL);
    RT_ASSERT(io_cfg != RT_NULL);
    
    mmcsd = (struct imxrt_mmcsd *)host->private_data;
    usdhc_clk = io_cfg->clock;
	bus_width = io_cfg->bus_width;
    
    if(usdhc_clk > IMXRT_MAX_FREQ)
        usdhc_clk = IMXRT_MAX_FREQ;    
    src_clk = (CLOCK_GetSysPfdFreq(kCLOCK_Pfd2) / (CLOCK_GetDiv(mmcsd->usdhc_div) + 1U));
    
    MMCSD_DGB("\tsrc_clk: %d, usdhc_clk: %d, bus_width: %d\n", src_clk, usdhc_clk, bus_width);
    
    if (usdhc_clk)
    {
        USDHC_SetSdClock(mmcsd->usdhc_host.base, src_clk, usdhc_clk);
        //CLOCK_EnableClock(mmcsd->ip_clock);
        
        /* Change bus width */
        if (bus_width == MMCSD_BUS_WIDTH_8)
            USDHC_SetDataBusWidth(mmcsd->usdhc_host.base, kUSDHC_DataBusWidth8Bit);
        else if (bus_width == MMCSD_BUS_WIDTH_4)
            USDHC_SetDataBusWidth(mmcsd->usdhc_host.base, kUSDHC_DataBusWidth4Bit);
        else if (bus_width == MMCSD_BUS_WIDTH_1)
            USDHC_SetDataBusWidth(mmcsd->usdhc_host.base, kUSDHC_DataBusWidth1Bit);
        else
            RT_ASSERT(RT_NULL);
    }
    else
    {
        //CLOCK_DisableClock(mmcsd->ip_clock);
    }
    
}

#ifdef DEBUG
static void log_toggle(int en)
{
    enable_log = en;
}
FINSH_FUNCTION_EXPORT(log_toggle, toglle log dumple);
#endif

//static rt_int32_t _mmc_get_card_status(struct rt_mmcsd_host *host)
//{
//    MMCSD_DGB("%s, start\n", __func__);
//    MMCSD_DGB("%s, end\n", __func__);
//    
//    return 0;
//}
//
//static void _mmc_enable_sdio_irq(struct rt_mmcsd_host *host, rt_int32_t enable)
//{
//
//}

static const struct rt_mmcsd_host_ops ops = {
	_mmc_request,
	_mmc_set_iocfg,
    RT_NULL,//_mmc_get_card_status,
	RT_NULL,//_mmc_enable_sdio_irq,
};

rt_int32_t _imxrt_mci_init(void)
{
	struct rt_mmcsd_host *host;
	struct imxrt_mmcsd *mmcsd;

	host = mmcsd_alloc_host();
	if (!host) 
	{
		return -RT_ERROR;
	}

	mmcsd = rt_malloc(sizeof(struct imxrt_mmcsd));
	if (!mmcsd) 
	{
		rt_kprintf("alloc mci failed\n");
		goto err;
	}

	rt_memset(mmcsd, 0, sizeof(struct imxrt_mmcsd));
    mmcsd->usdhc_host.base = USDHC1;
    mmcsd->usdhc_div = kCLOCK_Usdhc1Div;
    mmcsd->usdhc_adma2_table = g_usdhcAdma2Table;

	host->ops = &ops;
	host->freq_min = 375000;
	host->freq_max = 25000000;
	host->valid_ocr = VDD_32_33 | VDD_33_34;
	host->flags = MMCSD_BUSWIDTH_4 | MMCSD_MUTBLKWRITE | \
				MMCSD_SUP_HIGHSPEED | MMCSD_SUP_SDIO_IRQ;
	host->max_seg_size = 65535;
	host->max_dma_segs = 2;
	host->max_blk_size = 512;
	host->max_blk_count = 4096;

	mmcsd->host = host;

    _mmcsd_clk_init(mmcsd);
    _mmcsd_isr_init(mmcsd);
	_mmcsd_gpio_init(mmcsd);
    _mmcsd_host_init(mmcsd);

	host->private_data = mmcsd;

	mmcsd_change(host);

	return 0;

err:
	mmcsd_free_host(host);

	return -RT_ENOMEM;
}

int imxrt_mci_init(void)
{
    /* initilize sd card */
    _imxrt_mci_init();
    
    return 0;
}
INIT_DEVICE_EXPORT(imxrt_mci_init);