mtk-lk/platform/mt6757/msdc_irq.c

/* Copyright Statement:
*
* This software/firmware and related documentation ("MediaTek Software") are
* protected under relevant copyright laws. The information contained herein
* is confidential and proprietary to MediaTek Inc. and/or its licensors.
* Without the prior written permission of MediaTek inc. and/or its licensors,
* any reproduction, modification, use or disclosure of MediaTek Software,
* and information contained herein, in whole or in part, shall be strictly prohibited.
*/
/* MediaTek Inc. (C) 2015. All rights reserved.
*
* BY OPENING THIS FILE, RECEIVER HEREBY UNEQUIVOCALLY ACKNOWLEDGES AND AGREES
* THAT THE SOFTWARE/FIRMWARE AND ITS DOCUMENTATIONS ("MEDIATEK SOFTWARE")
* RECEIVED FROM MEDIATEK AND/OR ITS REPRESENTATIVES ARE PROVIDED TO RECEIVER ON
* AN "AS-IS" BASIS ONLY. MEDIATEK EXPRESSLY DISCLAIMS ANY AND ALL WARRANTIES,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE IMPLIED WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE OR NONINFRINGEMENT.
* NEITHER DOES MEDIATEK PROVIDE ANY WARRANTY WHATSOEVER WITH RESPECT TO THE
* SOFTWARE OF ANY THIRD PARTY WHICH MAY BE USED BY, INCORPORATED IN, OR
* SUPPLIED WITH THE MEDIATEK SOFTWARE, AND RECEIVER AGREES TO LOOK ONLY TO SUCH
* THIRD PARTY FOR ANY WARRANTY CLAIM RELATING THERETO. RECEIVER EXPRESSLY ACKNOWLEDGES
* THAT IT IS RECEIVER'S SOLE RESPONSIBILITY TO OBTAIN FROM ANY THIRD PARTY ALL PROPER LICENSES
* CONTAINED IN MEDIATEK SOFTWARE. MEDIATEK SHALL ALSO NOT BE RESPONSIBLE FOR ANY MEDIATEK
* SOFTWARE RELEASES MADE TO RECEIVER'S SPECIFICATION OR TO CONFORM TO A PARTICULAR
* STANDARD OR OPEN FORUM. RECEIVER'S SOLE AND EXCLUSIVE REMEDY AND MEDIATEK'S ENTIRE AND
* CUMULATIVE LIABILITY WITH RESPECT TO THE MEDIATEK SOFTWARE RELEASED HEREUNDER WILL BE,
* AT MEDIATEK'S OPTION, TO REVISE OR REPLACE THE MEDIATEK SOFTWARE AT ISSUE,
* OR REFUND ANY SOFTWARE LICENSE FEES OR SERVICE CHARGE PAID BY RECEIVER TO
* MEDIATEK FOR SUCH MEDIATEK SOFTWARE AT ISSUE.
*/

#include "msdc.h"

#if defined(MMC_MSDC_DRV_LK)
#include <kernel/event.h>
#include <platform/mt_irq.h>

static event_t msdc_int_event;
static u32 g_int_status = 0;

void lk_msdc_irq_handler(unsigned int irq)
{
	u32 intrs,sts;
	struct mmc_host *host = mmc_get_host(irq-MT_MSDC0_IRQ_ID);
	u32 base = host->base;

	mt_irq_ack(irq);
	intrs = MSDC_READ32(MSDC_INTEN);
	msdc_intr_mask(host,intrs);
	MSG(INT, "[lk_msdc_irq_handler]irq %x enable:%x %x\n",irq,intrs,MSDC_READ32(MSDC_INT));
	if ((sts = MSDC_READ32(MSDC_INT))& intrs) {
		g_int_status = sts;
		MSG(INT, "[lk_msdc_irq_handler]send event,%x\n",g_int_status);
		MSDC_WRITE32(MSDC_INT, sts);
		event_signal(&msdc_int_event,0);
	}
	return;
}
#endif

#if defined(MSDC_USE_IRQ)
#include "isrentry.h"
//#include "inc/Jade/x_define_irq.h"
//For CTP only
typedef void (*irq_handler_t)(void);
static const u32 msdc_irq_line[MSDC_MAX_NUM] = {MSDC0_IRQ_B_ID+8, MSDC1_IRQ_B_ID+8};
static void *msdc_irq_data[MSDC_MAX_NUM];
volatile u32 msdc_irq_sts[MSDC_MAX_NUM];
static hw_irq_handler_t sdio_irq_handler[MSDC_MAX_NUM];

#define DECLARE_MSDC_IRQ_HANDLER(x) \
static void msdc_irq_handler_##x(void) \
{ \
    msdc_irq_handler(msdc_irq_data[(x)]); \
}

#define REGISTER_MSDC_IRQ_HANDLER(id, hndl, data) \
do { \
    msdc_irq_data[(id)] = (void*)(data); \
    IRQSensitivity(msdc_irq_line[(id)], LEVEL_SENSITIVE); \
    IRQPolarity(msdc_irq_line[(id)], LOW_LEVEL_TRIGGER); \
    IRQ_Register_LISR(msdc_irq_line[(id)], hndl, NULL); \
    IRQUnmask(msdc_irq_line[(id)]); \
} while(0)

#define UNREGISTER_MSDC_IRQ_HANDLER(id) \
do { \
    IRQMask(msdc_irq_line[(id)]); \
    msdc_irq_data[(id)] = NULL; \
    IRQ_Register_LISR(msdc_irq_line[(id)], IRQ_Default_LISR, NULL); \
} while(0)

#if defined(FEATURE_MMC_SDIO)
static hw_irq_handler_t sdio_irq_handler[MSDC_MAX_NUM];

void msdc_register_hwirq(struct mmc_host *host, hw_irq_handler_t handler)
{
	sdio_irq_handler[host->id] = handler;
}
#endif

int in_iqr = 0;
static void msdc_irq_handler(void *data)
{
	struct mmc_host *host = (struct mmc_host*)data;
	u32 id = host->id;
	u32 base = host->base;
	u32 intsts;
	msdc_int_reg *int_reg = (msdc_int_reg*)&intsts;

	BUG_ON(base == 0);

	//IRQMask(msdc_irq_line[id]);
	DisableIRQ();

	intsts = MSDC_READ32(MSDC_INT);

	msdc_irq_sts[id] |= intsts;

	if (intsts & MSDC_INT_CDSC) {
		/* card detection */
		in_iqr++;
		MSG(INT, "in_irq(%d) intsts(0x%x)",in_iqr,intsts);
		MSG(INT, "\n[SD%d] Card %s\n", id, msdc_card_avail(host) ? "Inserted" : "Removed");
	}

	if (intsts & MSDC_INT_SDIOIRQ) {
		/* sdio bus interrupt */
		MSG(INT, "[SD%d] SDIO interrupt <===\n", id);
		/* Note. msdc detects logical-low of dat1 to trigger sdio interrupt.
		 * It will be triggered and should be _IGNORED_ since DAT1 of
		 * SDIO/MMC/SD/SDXC card is pulled low when it's inserted into the slot.
		 */
#if defined(FEATURE_MMC_SDIO)
		if (sdio_irq_handler[id]) {
			sdio_irq_handler[id]();

			/* clear it since it's already handled */
			msdc_irq_sts[id] &= ~MSDC_INT_SDIOIRQ;
		}
#endif
	}

	if (intsts & (MSDC_INT_CMDRDY|MSDC_INT_CMDTMO|MSDC_INT_RSPCRCERR)) {
		/* command done */
	}

	if (intsts & (MSDC_INT_ACMDRDY|MSDC_INT_ACMDTMO|MSDC_INT_ACMDCRCERR)) {
		/* auto command done */
	}

	if (intsts & MSDC_INT_ACMD19_DONE) {
		/* auto command 10 done */
	}

	if (intsts & MSDC_INT_XFER_COMPL) {
		/* data transfer done */
	}

	if (intsts & (MSDC_INT_DATCRCERR|MSDC_INT_DATTMO)) {
		/* data error */
	}

	if (intsts & MSDC_INT_DXFER_DONE) {
		/* dma transfer done */
	}

	if (intsts & MSDC_INT_DMAQ_EMPTY) {
		/* DMA queue empty */
	}

	if (intsts & MSDC_INT_CSTA) {
		/* CSTA available */
	}

	if (intsts & MSDC_INT_MMCIRQ) {
		/* MMCIRQ available */
	}

	MSG(INT, "[SD%d] IRQ_EVT(0x%x): MMCIRQ(%d) CDSC(%d), ACRDY(%d), ACTMO(%d), ACCRE(%d) AC19DN(%d)\n",
	    id,
	    intsts,
	    int_reg->mmcirq,
	    int_reg->cdsc,
	    int_reg->atocmdrdy,
	    int_reg->atocmdtmo,
	    int_reg->atocmdcrc,
	    int_reg->atocmd19done);

	MSG(INT, "[SD%d] IRQ_EVT(0x%x): SDIO(%d) CMDRDY(%d), CMDTMO(%d), RSPCRC(%d), CSTA(%d)\n",
	    id,
	    intsts,
	    int_reg->sdioirq,
	    int_reg->cmdrdy,
	    int_reg->cmdtmo,
	    int_reg->rspcrc,
	    int_reg->csta);

	MSG(INT, "[SD%d] IRQ_EVT(0x%x): XFCMP(%d) DXDONE(%d), DATTMO(%d), DATCRC(%d), DMAEMP(%d)\n",
	    id,
	    intsts,
	    int_reg->xfercomp,
	    int_reg->dxferdone,
	    int_reg->dattmo,
	    int_reg->datcrc,
	    int_reg->dmaqempty);

	MSDC_WRITE32(MSDC_INT, intsts); /* clear interrupts */

	//IRQUnmask(msdc_irq_line[id]);
	EnableIRQ();
}

DECLARE_MSDC_IRQ_HANDLER(0);
DECLARE_MSDC_IRQ_HANDLER(1);
DECLARE_MSDC_IRQ_HANDLER(2);
DECLARE_MSDC_IRQ_HANDLER(3);
static irq_handler_t isr[] = {
	msdc_irq_handler_0,
	msdc_irq_handler_1,
	msdc_irq_handler_2,
	msdc_irq_handler_3
};
#endif

void msdc_irq_init(struct mmc_host *host)
{
#if defined(MMC_MSDC_DRV_LK)
	msdc_intr_mask(host,0xffffffff);
	mt_irq_set_sens(MT_MSDC0_IRQ_ID, MT65xx_LEVEL_SENSITIVE);
	mt_irq_set_polarity(MT_MSDC0_IRQ_ID, MT65xx_POLARITY_LOW);
	event_init(&msdc_int_event,false,EVENT_FLAG_AUTOUNSIGNAL);
	mt_irq_unmask(MT_MSDC0_IRQ_ID);
#endif

#if defined(MSDC_USE_IRQ)
	//For CTP only
	msdc_irq_sts[host->id]  = 0;
#if defined(FEATURE_MMC_SDIO)
	sdio_irq_handler[id] = NULL;
#endif
	REGISTER_MSDC_IRQ_HANDLER(host->id, isr[host->id], host);
#endif
}

void msdc_irq_deinit(struct mmc_host *host)
{
#if defined(MSDC_USE_IRQ)
	//UNREGISTER_MSDC_IRQ_HANDLER(host->id); //Light: Comment it out to solve build error in CTP
#endif
}

#if defined(MMC_MSDC_DRV_LK)
u32 msdc_lk_intr_wait(struct mmc_host *host, u32 intrs)
{
	u32 base = host->base;
	u32 sts;
#ifdef FPGA_PLATFORM
	u32 tmo = 0xFFFFFF;
	//SW timeout may occur on FPGA if request size is large, e.g., LK read kernel
#else
	u32 tmo = 0xFFFF;
#endif
	int ret = 0;

	MSG(INT, "[msdc_lk_intr_wait]\n");
	/* warning that interrupts are not enabled */
	WARN_ON((MSDC_READ32(MSDC_INTEN) & intrs) != intrs);
	ret = event_wait_timeout(&msdc_int_event, tmo);
	if (ret != 0) {
		msdc_pr_err("[%s]: failed to get event\n", __func__);
	} else {
		MSG(INT, "[%s]: get event\n", __func__);
	}
	sts = g_int_status;
	g_int_status = 0;
	MSG(INT, "[SD%d] INT(0x%x)\n", host->id, sts);
	if (~intrs & sts) {
		MSG(WRN, "[SD%d]<CHECKME> Unexpected INT(0x%x)\n",
		    host->id, ~intrs & sts);
	}
	return sts;
}
#endif

u32 msdc_intr_wait(struct mmc_host *host, u32 intrs)
{
	u32 base = host->base;
	u32 sts;

	/* warning that interrupts are not enabled */
	WARN_ON((MSDC_READ32(MSDC_INTEN) & intrs) != intrs);

#if defined(MSDC_USE_IRQ)
	//For CTP only
	while (1) {
		DisableIRQ();
		if (msdc_irq_sts[host->id] & intrs) {
			sts = msdc_irq_sts[host->id];
			msdc_irq_sts[host->id] &= ~intrs;
			EnableIRQ();
			break;
		}
		EnableIRQ();
	}
#else
	{
		//Light: WAIT_COND is added after E1 ECO workaround.
		//       I combine WAIT_COND with infinite wait
		u32 tmo = 500000; //set tmo=0 to choose infinite wait
		WAIT_COND( ((sts = MSDC_READ32(MSDC_INT)) & intrs), tmo, tmo);

		if (tmo == 0) {
			msdc_pr_err("[SD%d] ECO WARNNING ==> Wait INT timeout\n", host->id);
			MSDC_RESET();
		}
	}

	MSDC_WRITE32(MSDC_INT, (sts & intrs));
#endif

	MSG(INT, "[SD%d] INT(0x%x)\n", host->id, sts);

	if (~intrs & sts) {
		MSG(WRN, "[SD%d]<CHECKME> Unexpected INT(0x%x)\n",
		    host->id, ~intrs & sts);
	}

#if defined(FEATURE_MMC_SDIO)
	if (sts & MSDC_INT_SDIOIRQ) {
#if (0 == MSDC_SLT_MASK_LOG)
		msdc_pr_info("(%s)INT status:0x%x\n", __func__, sts);
#endif
		//if ( (host->id == 2) || (host->id == 3) ) {
		//mmc_sdio_proc_pending_irqs(host->card);
		//isPendingIRQ++;
		//}
	}
#endif

	return sts;
}