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rt-thread-official/bsp/allwinner_tina/drivers/drv_sdio.c

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/*
* Copyright (c) 2006-2021, RT-Thread Development Team
*
* SPDX-License-Identifier: Apache-2.0
*
* Change Logs:
* Date Author Notes
* 2018-02-08 RT-Thread the first version
*/
#include <rtthread.h>
#include <rthw.h>
#include <rtdevice.h>
#include <string.h>
#include "drv_sdio.h"
#include "interrupt.h"
#include "mmu.h"
#include "drv_gpio.h"
#include "drv_clock.h"
#define DBG_TAG "MMC"
// #define DBG_LVL DBG_LOG
// #define DBG_LVL DBG_INFO
#define DBG_LVL DBG_WARNING
// #define DBG_LVL DBG_ERROR
#include <rtdbg.h>
#ifdef RT_USING_SDIO
#define CONFIG_MMC_USE_DMA
#define DMA_ALIGN (32U)
struct mmc_xfe_des
{
rt_uint32_t size; /* block size */
rt_uint32_t num; /* block num */
rt_uint8_t *buff; /* buff addr */
rt_uint32_t flag; /* write or read or stream */
#define MMC_DATA_WRITE (1 << 0)
#define MMC_DATA_READ (1 << 1)
#define MMC_DATA_STREAM (1 << 2)
};
struct mmc_flag
{
volatile rt_uint32_t risr;
volatile rt_uint32_t idst;
};
struct sdio_drv
{
struct rt_mmcsd_host *host;
struct rt_mmcsd_req *req;
struct rt_semaphore rt_sem;
struct mmc_xfe_des xfe;
struct mmc_flag flag;
tina_mmc_t mmc_des;
rt_uint8_t *mmc_buf;
rt_uint8_t usedma;
};
#ifdef CONFIG_MMC_USE_DMA
#ifdef TINA_USING_SDIO0
rt_align(32) static rt_uint8_t dma_buffer[64 * 1024];
#endif
#endif
static void mmc_request_end(struct rt_mmcsd_host *host, struct rt_mmcsd_req *req);
static void mmc_delay_us(int us)
{
volatile unsigned int temp;
while (us--)
{
temp = 0x2f;
while (temp--)
{
temp = temp;
};
}
}
static void mmc_dump_errinfo(unsigned int err)
{
LOG_E("[err]:0x%08x, %s%s%s%s%s%s%s%s%s%s%s",
err,
err & SDXC_RespErr ? " RE" : "",
err & SDXC_RespCRCErr ? " RCE" : "",
err & SDXC_DataCRCErr ? " DCE" : "",
err & SDXC_RespTimeout ? " RTO" : "",
err & SDXC_DataTimeout ? " DTO" : "",
err & SDXC_DataStarve ? " DS" : "",
err & SDXC_FIFORunErr ? " FE" : "",
err & SDXC_HardWLocked ? " HL" : "",
err & SDXC_StartBitErr ? " SBE" : "",
err & SDXC_EndBitErr ? " EBE" : "",
err == 0 ? " STO" : ""
);
}
static int mmc_update_clk(tina_mmc_t mmc)
{
rt_uint32_t cmd;
rt_uint32_t timeout = 2000000;
/* cmd load */
cmd = SDXC_LOAD_CMD | SDXC_UPDATE_CLOCK_CMD | SDXC_WAIT_OVER_CMD;
mmc->cmdr_reg = cmd;
/* while load success */
while ((mmc->cmdr_reg & SDXC_LOAD_CMD) && (--timeout))
{
mmc_delay_us(1);
}
if (!timeout)
{
LOG_E("mmc update clk failed");
return -RT_ERROR;
}
/* clean interrupt */
mmc->risr_reg = mmc->risr_reg;
return RT_EOK;
}
static rt_err_t mmc_trans_data_by_dma(tina_mmc_t mmc, struct mmc_xfe_des *xfe)
{
rt_align(32) static struct mmc_des_v4p1 pdes[128];
unsigned i, rval;
unsigned des_idx;
unsigned length = xfe->size * xfe->num;
unsigned buff_frag_num = length >> SDXC_DES_NUM_SHIFT;
unsigned remain = length & (SDXC_DES_BUFFER_MAX_LEN - 1);
if (remain)
{
buff_frag_num ++;
}
else
{
remain = SDXC_DES_BUFFER_MAX_LEN;
}
memset(pdes, 0, sizeof(pdes));
mmu_clean_dcache((rt_uint32_t)(xfe->buff), length);
for (i = 0, des_idx = 0; i < buff_frag_num; i++, des_idx++)
{
// memset((void*)&pdes[des_idx], 0, sizeof(struct mmc_v4p1));
pdes[des_idx].des_chain = 1;
pdes[des_idx].own = 1;
pdes[des_idx].dic = 1;
if ((buff_frag_num > 1) && (i != buff_frag_num - 1))
{
pdes[des_idx].data_buf1_sz = SDXC_DES_BUFFER_MAX_LEN;
}
else
{
pdes[des_idx].data_buf1_sz = remain;
}
pdes[des_idx].buf_addr_ptr1 = (unsigned long)(xfe->buff) + i * SDXC_DES_BUFFER_MAX_LEN;
if (i == 0)
{
pdes[des_idx].first_des = 1;
}
if (i == (buff_frag_num - 1))
{
pdes[des_idx].dic = 0;
pdes[des_idx].last_des = 1;
pdes[des_idx].end_of_ring = 1;
pdes[des_idx].buf_addr_ptr2 = 0;
}
else
{
pdes[des_idx].buf_addr_ptr2 = (unsigned long)&pdes[des_idx+1];
}
LOG_D("frag %d, remain %d, des[%d](%08x): " \
"[0] = %08x, [1] = %08x, [2] = %08x, [3] = %08x", \
i, remain, des_idx, (unsigned int)&pdes[des_idx],
(unsigned int)((unsigned int*)&pdes[des_idx])[0], (unsigned int)((unsigned int*)&pdes[des_idx])[1],
(unsigned int)((unsigned int*)&pdes[des_idx])[2], (unsigned int)((unsigned int*)&pdes[des_idx])[3]);
}
mmu_clean_dcache((rt_uint32_t)pdes, sizeof(struct mmc_des_v4p1) * (des_idx + 1));
/*
* GCTRLREG
* GCTRL[2] : DMA reset
* GCTRL[5] : DMA enable
*
* IDMACREG
* IDMAC[0] : IDMA soft reset
* IDMAC[1] : IDMA fix burst flag
* IDMAC[7] : IDMA on
*
* IDIECREG
* IDIE[0] : IDMA transmit interrupt flag
* IDIE[1] : IDMA receive interrupt flag
*/
rval = mmc->gctl_reg;
mmc->gctl_reg = rval | (1 << 5) | (1 << 2); /* dma enable */
mmc->dmac_reg = (1 << 0); /* idma reset */
while(mmc->dmac_reg & 0x1) {}; /* wait idma reset done */
mmc->dmac_reg = (1 << 1) | (1 << 7); /* idma on */
rval = mmc->idie_reg & (~3);
if (xfe->flag == MMC_DATA_WRITE)
rval |= (1 << 0);
else
rval |= (1 << 1);
mmc->idie_reg = rval;
mmc->dlba_reg = (unsigned long)pdes;
mmc->fwlr_reg = (2U << 28) | (7U << 16) | 8;
return 0;
}
static rt_err_t mmc_trans_data_by_cpu(tina_mmc_t mmc, struct mmc_xfe_des *xfe)
{
unsigned i;
unsigned byte_cnt = xfe->size * xfe->num;
unsigned *buff = (unsigned *)(xfe->buff);
volatile unsigned timeout = 2000000;
if (xfe->flag == MMC_DATA_WRITE)
{
for (i = 0; i < (byte_cnt >> 2); i++)
{
while(--timeout && (mmc->star_reg & (1 << 3)));
if (timeout <= 0)
{
LOG_E("write data by cpu failed status:0x%08x", mmc->star_reg);
return -RT_ERROR;
}
mmc->fifo_reg = buff[i];
timeout = 2000000;
}
}
else
{
for (i = 0; i < (byte_cnt >> 2); i++)
{
while(--timeout && (mmc->star_reg & (1 << 2)));
if (timeout <= 0)
{
LOG_E("read data by cpu failed status:0x%08x", mmc->star_reg);
return -RT_ERROR;
}
buff[i] = mmc->fifo_reg;
timeout = 2000000;
}
}
return RT_EOK;
}
static rt_err_t mmc_config_clock(tina_mmc_t mmc, int clk)
{
rt_uint32_t rval = 0;
/* disable card clock */
rval = mmc->ckcr_reg;
rval &= ~(1 << 16);
mmc->ckcr_reg = rval;
if (mmc_update_clk(mmc) != RT_EOK)
{
LOG_E("clk update fail line:%d", __LINE__);
return -RT_ERROR;
}
if (mmc == MMC0)
{
mmc_set_clk(SDMMC0, clk);
}
else
{
mmc_set_clk(SDMMC1, clk);
}
/* Re-enable card clock */
rval = mmc->ckcr_reg;
rval |= (0x1 << 16); //(3 << 16);
mmc->ckcr_reg = rval;
if(mmc_update_clk(mmc) != RT_EOK)
{
LOG_E("clk update fail line:%d", __LINE__);
return -RT_ERROR;
}
return RT_EOK;
}
static rt_err_t mmc_set_ios(tina_mmc_t mmc, int clk, int bus_width)
{
LOG_D("mmc set io bus width:%d clock:%d", \
(bus_width == MMCSD_BUS_WIDTH_8 ? 8 : (bus_width == MMCSD_BUS_WIDTH_4 ? 4 : 1)), clk);
/* change clock */
if (clk && (mmc_config_clock(mmc, clk) != RT_EOK))
{
LOG_E("update clock failed");
return -RT_ERROR;
}
/* Change bus width */
if (bus_width == MMCSD_BUS_WIDTH_8)
{
mmc->bwdr_reg = 2;
}
else if (bus_width == MMCSD_BUS_WIDTH_4)
{
mmc->bwdr_reg = 1;
}
else
{
mmc->bwdr_reg = 0;
}
return RT_EOK;
}
static int mmc_send_cmd(struct rt_mmcsd_host *host, struct rt_mmcsd_cmd *cmd)
{
unsigned int cmdval = 0x80000000;
signed int timeout = 0;
int err = 0;
unsigned int status = 0;
struct rt_mmcsd_data *data = cmd->data;
unsigned int bytecnt = 0;
struct sdio_drv *sdio_des = (struct sdio_drv *)host->private_data;
tina_mmc_t mmc = sdio_des->mmc_des;
timeout = 5000 * 1000;
status = mmc->star_reg;
while (status & (1 << 9))
{
LOG_D("note: check card busy");
status = mmc->star_reg;
if (!timeout--)
{
err = -1;
LOG_E("mmc cmd12 busy timeout data:0x%08x", status);
return err;
}
mmc_delay_us(1);
}
/*
* CMDREG
* CMD[5:0] : Command index
* CMD[6] : Has response
* CMD[7] : Long response
* CMD[8] : Check response CRC
* CMD[9] : Has data
* CMD[10] : Write
* CMD[11] : Steam mode
* CMD[12] : Auto stop
* CMD[13] : Wait previous over
* CMD[14] : About cmd
* CMD[15] : Send initialization
* CMD[21] : Update clock
* CMD[31] : Load cmd
*/
if (!cmd->cmd_code)
cmdval |= (1 << 15);
if (resp_type(cmd) != RESP_NONE)
cmdval |= (1 << 6);
if (resp_type(cmd) == RESP_R2)
cmdval |= (1 << 7);
if ((resp_type(cmd) != RESP_R3) && (resp_type(cmd) != RESP_R4))
cmdval |= (1 << 8);
if (data)
{
cmdval |= (1 << 9) | (1 << 13);
if (data->flags & DATA_DIR_WRITE)
cmdval |= (1 << 10);
if (data->blks > 1)
cmdval |= (1 << 12);
mmc->bksr_reg = data->blksize;
bytecnt = data->blksize * data->blks;
mmc->bycr_reg = bytecnt;
}
LOG_D("cmd %d(0x%08x), arg 0x%08x", cmd->cmd_code, cmdval | cmd->cmd_code, cmd->arg);
mmc->cagr_reg = cmd->arg;
if (!data)
{
mmc->cmdr_reg = cmdval | cmd->cmd_code;
mmc->imkr_reg |= 0x1 << 2;
}
/*
* transfer data and check status
* STATREG[2] : FIFO empty
* STATREG[3] : FIFO full
*/
if (data)
{
LOG_D("mmc trans data %d bytes addr:0x%08x", bytecnt, data);
#ifdef CONFIG_MMC_USE_DMA
if (bytecnt > 64)
{
#else
if (0)
{
#endif
sdio_des->usedma = 1;
mmc->gctl_reg = mmc->gctl_reg & (~0x80000000);
mmc_trans_data_by_dma(mmc, &sdio_des->xfe);
mmc->cmdr_reg = cmdval | cmd->cmd_code;
}
else
{
sdio_des->usedma = 0;
mmc->gctl_reg = mmc->gctl_reg | 0x80000000;
mmc->cmdr_reg = cmdval | cmd->cmd_code;
mmc_trans_data_by_cpu(mmc, &sdio_des->xfe);
}
if (data->blks > 1)
{
mmc->imkr_reg |= (0x1 << 14);
}
else
{
mmc->imkr_reg |= (0x1 << 3);
}
}
mmc->imkr_reg |= 0xbfc2;
if (data)
{
//TODO:2 * bytecnt * 4?
timeout = sdio_des->usedma ? (2 * bytecnt * 4) : 100; //0.04us(25M)*2(4bit width)*25()
if (timeout < 10)
{
timeout = 10;
}
}
else
{
timeout = 200;
}
if (rt_sem_take(&sdio_des->rt_sem, timeout) != RT_EOK)
{
err = (mmc->risr_reg | sdio_des->flag.risr) & 0xbfc2;
goto out;
}
err = (mmc->risr_reg | sdio_des->flag.risr) & 0xbfc2;
if (err)
{
cmd->err = -RT_ETIMEOUT;
goto out;
}
if (resp_type(cmd) == RESP_R2)
{
cmd->resp[3] = mmc->resp0_reg;
cmd->resp[2] = mmc->resp1_reg;
cmd->resp[1] = mmc->resp2_reg;
cmd->resp[0] = mmc->resp3_reg;
LOG_D("mmc resp 0x%08x 0x%08x 0x%08x 0x%08x",
cmd->resp[0], cmd->resp[1], cmd->resp[2], cmd->resp[3]);
}
else
{
cmd->resp[0] = mmc->resp0_reg;
LOG_D("mmc resp 0x%08x", cmd->resp[0]);
}
out:
if (err)
{
mmc_dump_errinfo(err & 0xbfc2);
}
if (data && sdio_des->usedma)
{
/* IDMASTAREG
* IDST[0] : idma tx int
* IDST[1] : idma rx int
* IDST[2] : idma fatal bus error
* IDST[4] : idma descriptor invalid
* IDST[5] : idma error summary
* IDST[8] : idma normal interrupt sumary
* IDST[9] : idma abnormal interrupt sumary
*/
status = mmc->idst_reg;
mmc->idst_reg = status;
mmc->idie_reg = 0;
mmc->dmac_reg = 0;
mmc->gctl_reg = mmc->gctl_reg & (~(1 << 5));
}
if (err)
{
if (data && (data->flags & DATA_DIR_READ) && (bytecnt == 512))
{
mmc->gctl_reg = mmc->gctl_reg | 0x80000000;
mmc->dbgc_reg = 0xdeb;
timeout = 1000;
LOG_D("Read remain data");
while (mmc->bbcr_reg < 512)
{
unsigned int tmp = mmc->fifo_reg;
tmp = tmp;
LOG_D("Read data 0x%08x, bbcr 0x%04x", tmp, mmc->bbcr_reg);
mmc_delay_us(1);
if (!(timeout--))
{
LOG_E("Read remain data timeout");
break;
}
}
}
mmc->gctl_reg = 0x7;
while (mmc->gctl_reg & 0x7) { };
mmc_update_clk(mmc);
cmd->err = -RT_ETIMEOUT;
LOG_E("mmc cmd %d err", cmd->cmd_code);
}
mmc->gctl_reg &= ~(0x1 << 4);
mmc->imkr_reg &= ~0xffff;
mmc->risr_reg = 0xffffffff;
mmc->gctl_reg |= 0x1 << 4;
while (!rt_sem_take(&sdio_des->rt_sem, 0)) {}
mmc_request_end(sdio_des->host, sdio_des->req);
return err;
}
static void mmc_request_end(struct rt_mmcsd_host *host, struct rt_mmcsd_req *req)
{
struct rt_mmcsd_data *data;
unsigned byte_cnt;
struct sdio_drv *sdio = (struct sdio_drv *)host->private_data;
#ifdef CONFIG_MMC_USE_DMA
data = req->cmd->data;
if (data)
{
byte_cnt = data->blksize * data->blks;
if ((byte_cnt > 64) && (data->flags & DATA_DIR_READ))
{
mmu_invalidate_dcache((rt_uint32_t)sdio->xfe.buff, (rt_uint32_t)byte_cnt);
if (((rt_uint32_t)data->buf) & (DMA_ALIGN - 1))
{
memcpy(data->buf, sdio->xfe.buff, byte_cnt);
}
}
}
#endif
mmcsd_req_complete(host);
}
static void sdio_request_send(struct rt_mmcsd_host *host, struct rt_mmcsd_req *req)
{
struct rt_mmcsd_data *data;
int byte_cnt;
struct sdio_drv *sdio;
sdio = (struct sdio_drv *)host->private_data;
sdio->req = req;
data = req->cmd->data;
if (data)
{
sdio->xfe.size = data->blksize;
sdio->xfe.num = data->blks;
sdio->xfe.buff = (rt_uint8_t *)data->buf;
sdio->xfe.flag = (data->flags & DATA_DIR_WRITE) ? \
MMC_DATA_WRITE : MMC_DATA_READ;
#ifdef CONFIG_MMC_USE_DMA
byte_cnt = data->blksize * data->blks;
if ((byte_cnt > 64) && (((rt_uint32_t)data->buf) & (DMA_ALIGN - 1)))
{
sdio->xfe.buff = (rt_uint8_t *)sdio->mmc_buf;
if (data->flags & DATA_DIR_WRITE)
{
memcpy(sdio->mmc_buf, data->buf, byte_cnt);
mmu_clean_dcache((rt_uint32_t)sdio->mmc_buf, (rt_uint32_t)byte_cnt);
}
}
#endif
}
memset(&sdio->flag, 0, sizeof(struct mmc_flag));
mmc_send_cmd(host, req->cmd);
return;
}
static void sdio_set_iocfg(struct rt_mmcsd_host *host, struct rt_mmcsd_io_cfg *io_cfg)
{
int clk = io_cfg->clock;
int width = io_cfg->bus_width;
struct sdio_drv *sdio_des = (struct sdio_drv *)host->private_data;
tina_mmc_t mmc = sdio_des->mmc_des;
mmc_set_ios(mmc, clk, width);
}
static const struct rt_mmcsd_host_ops ops =
{
sdio_request_send,
sdio_set_iocfg,
RT_NULL,
RT_NULL,
};
static void sdio_interrupt_handle(int irqno, void *param)
{
rt_uint32_t risr, idst;
rt_uint32_t status;
struct sdio_drv *sdio_des = (struct sdio_drv *)param;
struct rt_mmcsd_data *data = sdio_des->req->cmd->data;
tina_mmc_t mmc = sdio_des->mmc_des;
risr = mmc->risr_reg;
idst = mmc->idst_reg;
mmc->risr_reg = risr & mmc->imkr_reg;
mmc->idst_reg = idst & mmc->idie_reg;
sdio_des->flag.risr |= risr;
sdio_des->flag.idst |= idst;
if (data)
{
int done = 0;
status = sdio_des->flag.risr | mmc->risr_reg;
if (data->blks > 1)//not wait auto stop when MMC_CMD_MANUAL is set
{
if (sdio_des->usedma)
done = ((status & (1 << 14)) && (sdio_des->flag.idst & 0x3)) ? 1 : 0;
else
done = status & (1 << 14);
}
else
{
if (sdio_des->usedma)
done = ((status & (1 << 3)) && (sdio_des->flag.idst & 0x3)) ? 1 : 0;
else
done = status & (1 << 3);
}
if (done)
{
rt_sem_release(&sdio_des->rt_sem);
}
}
else
{
rt_sem_release(&sdio_des->rt_sem);
}
}
static void sdio_gpio_init(struct sdio_drv *sdio_des)
{
int pin;
if ((rt_uint32_t)sdio_des->mmc_des == MMC0_BASE_ADDR)
{
/* SDC0: PF0-PF5 */
for (pin = GPIO_PIN_0; pin <= GPIO_PIN_5; pin++)
{
gpio_set_func(GPIO_PORT_F, pin, IO_FUN_1);
gpio_set_pull_mode(GPIO_PORT_F, pin, PULL_UP);
gpio_set_drive_level(GPIO_PORT_F, pin, DRV_LEVEL_2);
}
}
else if ((rt_uint32_t)sdio_des->mmc_des == MMC1_BASE_ADDR)
{
//todo: config gpio port
RT_ASSERT(0);
}
}
static void sdio_clk_io_on(struct sdio_drv *sdio_des)
{
if ((rt_uint32_t)sdio_des->mmc_des == MMC0_BASE_ADDR)
{
CCU->bus_clk_gating0 |= 0x1 << 8;
CCU->bus_soft_rst0 |= 0x1 << 8;
}
else if ((rt_uint32_t)sdio_des->mmc_des == MMC1_BASE_ADDR)
{
CCU->bus_clk_gating0 |= 0x1 << 9;
CCU->bus_soft_rst0 |= 0x1 << 9;
}
mmc_set_clk(SDMMC0, 24000000);
}
static void sdio_irq_init(void *param)
{
struct sdio_drv *sdio_des = (struct sdio_drv *)param;
if ((rt_uint32_t)sdio_des->mmc_des == MMC0_BASE_ADDR)
{
rt_hw_interrupt_install(SDC0_INTERRUPT, sdio_interrupt_handle, param, "mmc0_irq");
rt_hw_interrupt_umask(SDC0_INTERRUPT);
}
else if ((rt_uint32_t)sdio_des->mmc_des == MMC1_BASE_ADDR)
{
rt_hw_interrupt_install(SDC1_INTERRUPT, sdio_interrupt_handle, param, "mmc1_irq");
rt_hw_interrupt_umask(SDC1_INTERRUPT);
}
sdio_des->mmc_des->gctl_reg |= (0x1 << 4);
}
int tina_sdio_init(void)
{
struct rt_mmcsd_host *host;
#ifdef TINA_USING_SDIO0
{
static struct sdio_drv _sdio_drv;
host = mmcsd_alloc_host();
if (!host)
{
LOG_E("alloc host failed");
goto err;
}
if (rt_sem_init(&_sdio_drv.rt_sem, "sdio_sem", RT_NULL, RT_IPC_FLAG_FIFO))
{
LOG_E("sem init failed");
goto err;
}
_sdio_drv.mmc_des = (tina_mmc_t)MMC0_BASE_ADDR;
_sdio_drv.mmc_buf = dma_buffer;
//init gpio pin
sdio_gpio_init(&_sdio_drv);
//clk is on
sdio_clk_io_on(&_sdio_drv);
//irq init
sdio_irq_init(&_sdio_drv);
host->ops = &ops;
host->freq_min = 400 * 1000;
host->freq_max = 50 * 1000 * 1000;
host->valid_ocr = VDD_26_27 | VDD_27_28 | VDD_28_29 | VDD_29_30 | VDD_30_31 | VDD_31_32 |
VDD_32_33 | VDD_33_34 | VDD_34_35 | VDD_35_36;
host->flags = MMCSD_BUSWIDTH_4 | MMCSD_MUTBLKWRITE | MMCSD_SUP_SDIO_IRQ | MMCSD_SUP_HIGHSPEED;
host->max_seg_size = 2048;
host->max_dma_segs = 10;
host->max_blk_size = 512;
host->max_blk_count = 4096;
host->private_data = &_sdio_drv;
_sdio_drv.host = host;
mmcsd_change(host);
}
#endif
return RT_EOK;
err:
if (host)
{
rt_free(host);
}
return RT_ERROR;
}
INIT_APP_EXPORT(tina_sdio_init);
#endif
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