385 lines
11 KiB
C
385 lines
11 KiB
C
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/*
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* linux/drivers/mmc/core/sdio_irq.c
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*
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* Author: Nicolas Pitre
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* Created: June 18, 2007
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* Copyright: MontaVista Software Inc.
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*
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* Copyright 2008 Pierre Ossman
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or (at
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* your option) any later version.
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*/
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#include "sys/param.h"
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#include "hal_sdhost.h"
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#include "sdmmc.h"
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#include "sdio.h"
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#include "sched.h"
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#include "_sd_define.h"
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#include "_core.h"
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#include "_sdio.h"
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//#define CONFIG_SDIO_IRQ_SUPPORT
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#ifndef portMAX_DELAY
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#define portMAX_DELAY 0xffffffffUL
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#endif
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#ifndef LONG_MAX
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#define LONG_MAX ((long)(~0UL>>1))
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#endif
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#define MAX_SCHEDULE_TIMEOUT LONG_MAX
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static int process_sdio_pending_irqs(struct mmc_host *host)
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{
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struct mmc_card *card = host->card;
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int i, ret, count;
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unsigned char pending;
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struct sdio_func *func;
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/*
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* Optimization, if there is only 1 function interrupt registered
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* and we know an IRQ was signaled then call irq handler directly.
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* Otherwise do the full probe.
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*/
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#if 1
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func = card->sdio_single_irq;
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if (func && host->sdio_irq_pending) {
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//if (func) {
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//HAL_MSleep(2);
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#ifdef SD_PERF_TRACE_ON
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if(!(host->sdio_irq_count%3000))
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SD_LOGN("d1 wait time %lld ns\n", HAL_PR_SZ_L(host->sdio_irq_times_ns = HAL_GetTimeNs()- host->start_sdio_irq_times_ns));
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#endif
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func->irq_handler(func);
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return 1;
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}
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#endif
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ret = mmc_io_rw_direct(card, 0, 0, SDIO_CCCR_INTx, 0, &pending);
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if (ret) {
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//SD_LOGE("%s: error %d reading SDIO_CCCR_INTx\n",
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// mmc_card_id(card), ret);
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SD_LOGE("error %d reading SDIO_CCCR_INTx\n", ret);
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return ret;
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}
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#if 0
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if (pending && mmc_card_broken_irq_polling(card) &&
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!(host->caps & MMC_CAP_SDIO_IRQ)) {
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#endif
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if (pending &&
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!(host->caps & MMC_CAP_SDIO_IRQ)) {
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unsigned char dummy;
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/* A fake interrupt could be created when we poll SDIO_CCCR_INTx
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* register with a Marvell SD8797 card. A dummy CMD52 read to
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* function 0 register 0xff can avoid this.
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*/
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mmc_io_rw_direct(card, 0, 0, 0xff, 0, &dummy);
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}
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count = 0;
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for (i = 1; i <= 7; i++) {
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if (pending & (1 << i)) {
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func = card->sdio_func[i - 1];
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if (!func) {
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/*pr_warn("%s: pending IRQ for non-existent function\n",
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mmc_card_id(card));*/
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SD_LOGW("pending IRQ for non-existent function\n");
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ret = -EINVAL;
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} else if (func->irq_handler) {
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func->irq_handler(func);
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count++;
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} else {
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/*SD_LOGW("%s: pending IRQ with no handler\n",
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sdio_func_id(func));*/
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SD_LOGW("pending IRQ with no handler\n");
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ret = -EINVAL;
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}
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}
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}
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if (count)
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return count;
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return ret;
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}
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void sdio_run_irqs(struct mmc_host *host)
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{
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mmc_claim_host(host);
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host->sdio_irq_pending = true;
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process_sdio_pending_irqs(host);
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mmc_release_host(host);
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}
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//EXPORT_SYMBOL_GPL(sdio_run_irqs);
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static int sdio_irq_thread(void *_host)
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{
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struct mmc_host *host = _host;
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struct mmc_card *card = host->card;
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struct sched_param param = { .sched_priority = 1 };
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unsigned long period, idle_period;
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int ret = 0;
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/*
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* We want to allow for SDIO cards to work even on non SDIO
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* aware hosts. One thing that non SDIO host cannot do is
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* asynchronous notification of pending SDIO card interrupts
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* hence we poll for them in that case.
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*/
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idle_period = 10;
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period = (host->caps & MMC_CAP_SDIO_IRQ) ?
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200 : idle_period;
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SD_LOGD("%s: IRQ thread started (poll period = %lu jiffies)\n", __func__,period);
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do {
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/*
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* We claim the host here on drivers behalf for a couple
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* reasons:
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*
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* 1) it is already needed to retrieve the CCCR_INTx;
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* 2) we want the driver(s) to clear the IRQ condition ASAP;
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* 3) we need to control the abort condition locally.
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*
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* Just like traditional hard IRQ handlers, we expect SDIO
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* IRQ handlers to be quick and to the point, so that the
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* holding of the host lock does not cover too much work
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* that doesn't require that lock to be held.
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*/
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mmc_claim_host(host);
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ret = process_sdio_pending_irqs(host);
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host->sdio_irq_pending = false;
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mmc_release_host(host);
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/*
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* Give other threads a chance to run in the presence of
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* errors.
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*/
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if (ret < 0) {
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if (!HAL_Thread_Should_Stop(host->sdio_irq_thread_stop))
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HAL_MSleep(1000);
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}
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/*
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* Adaptive polling frequency based on the assumption
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* that an interrupt will be closely followed by more.
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* This has a substantial benefit for network devices.
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*/
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#if 0
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if (!(host->caps & MMC_CAP_SDIO_IRQ)) {
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if (ret > 0)
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period /= 2;
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else {
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period++;
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if (period > idle_period)
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period = idle_period;
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}
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}
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#endif
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//set_current_state(TASK_INTERRUPTIBLE);
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if (host->caps & MMC_CAP_SDIO_IRQ){
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HAL_SDC_Enable_Sdio_Irq(host, 1);
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OS_SemaphoreWait(&host->sdio_irq_signal,portMAX_DELAY);
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/*
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while(1){
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#define readl(addr) (*((volatile unsigned long *)(addr)))
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ret = OS_SemaphoreWait(&host->sdio_irq_signal,period);
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if(ret == OS_E_TIMEOUT){
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printf("Imask %x\n",readl(0x4021000+0x30));
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printf("rint %x\n",readl(0x4021000+0x38));
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}else if(ret ==OS_OK){
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break;
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}
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}
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*/
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} else if (!HAL_Thread_Should_Stop(host->sdio_irq_thread_stop)){
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HAL_MSleep(period);
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}
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} while (!HAL_Thread_Should_Stop(host->sdio_irq_thread_stop));
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if (host->caps & MMC_CAP_SDIO_IRQ)
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HAL_SDC_Enable_Sdio_Irq(host, 0);
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SD_LOGD("IRQ thread exiting with code %d\n",ret);
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HAL_ThreadEnd(host->sdio_irq_thread_stop);
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printf("%s,%d\n",__func__,__LINE__);
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printf("IRQ thread exiting with code %d\n",ret);
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HAL_ThreadDelete();
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return ret;
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}
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static int irq_thread_pri = 20;
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void sdio_set_irq_thread_pri(int pri)
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{
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irq_thread_pri = pri;
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}
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static int sdio_card_irq_get(struct mmc_card *card)
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{
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struct mmc_host *host = card->host;
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// WARN_ON(!host->claimed);
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if (!host->sdio_irqs++) {
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if (!(host->caps2 & MMC_CAP2_SDIO_IRQ_NOTHREAD)) {
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int ret = 0;
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//atomic_set(&host->sdio_irq_thread_abort, 0);
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HAL_ATMOTIC_SET(host->sdio_irq_thread_abort, 0);
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//host->sdio_irq_thread =
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// kthread_run(sdio_irq_thread, host,
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// "ksdioirqd/%s", mmc_hostname(host));
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OS_ThreadSetInvalid(&host->sdio_irq_thread);
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ret = OS_ThreadCreate(&host->sdio_irq_thread, "ksdioirqd", \
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(void *)sdio_irq_thread, host,irq_thread_pri, 16*1024);
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if (ret != OS_OK) {
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//int err = PTR_ERR(host->sdio_irq_thread);
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host->sdio_irqs--;
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return ret;
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}
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} else if (host->caps & MMC_CAP_SDIO_IRQ) {
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//host->ops->enable_sdio_irq(host, 1);
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HAL_SDC_Enable_Sdio_Irq(host, 1);
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}
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}
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return 0;
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}
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static int sdio_card_irq_put(struct mmc_card *card)
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{
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struct mmc_host *host = card->host;
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/*WARN_ON(!host->claimed);*/
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SD_BUG_ON(host->sdio_irqs < 1);
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if (!--host->sdio_irqs) {
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if (!(host->caps2 & MMC_CAP2_SDIO_IRQ_NOTHREAD)) {
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//atomic_set(&host->sdio_irq_thread_abort, 1);
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HAL_ATMOTIC_SET(host->sdio_irq_thread_abort, 1);
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HAL_ThreadStop(host->sdio_irq_thread_stop);
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OS_SemaphoreRelease(&host->sdio_irq_signal);
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//kthread_stop(host->sdio_irq_thread);
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} else if (host->caps & MMC_CAP_SDIO_IRQ) {
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//host->ops->enable_sdio_irq(host, 0);
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HAL_SDC_Enable_Sdio_Irq(host, 0);
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}
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}
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return 0;
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}
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/* If there is only 1 function registered set sdio_single_irq */
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static void sdio_single_irq_set(struct mmc_card *card)
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{
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struct sdio_func *func;
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int i;
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card->sdio_single_irq = NULL;
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if ((card->host->caps & MMC_CAP_SDIO_IRQ) &&
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card->host->sdio_irqs == 1)
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for (i = 0; i < card->sdio_funcs; i++) {
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func = card->sdio_func[i];
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if (func && func->irq_handler) {
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card->sdio_single_irq = func;
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break;
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}
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}
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}
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/**
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* sdio_claim_irq - claim the IRQ for a SDIO function
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* @func: SDIO function
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* @handler: IRQ handler callback
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*
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* Claim and activate the IRQ for the given SDIO function. The provided
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* handler will be called when that IRQ is asserted. The host is always
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* claimed already when the handler is called so the handler must not
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* call sdio_claim_host() nor sdio_release_host().
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*/
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int sdio_claim_irq(struct sdio_func *func, sdio_irq_handler_t *handler)
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{
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int ret;
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unsigned char reg;
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struct mmc_card *card = func->card;
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SD_BUG_ON(!func);
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SD_BUG_ON(!func->card);
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SD_LOGD("SDIO: Enabling IRQ for %ld...\n", HAL_PR_SZ_L(func->num));
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if (func->irq_handler) {
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//SD_LOGD("SDIO: IRQ for %s already in use.\n", sdio_func_id(func));
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SD_LOGD("SDIO: IRQ for %ld already in use.\n", HAL_PR_SZ_L(func->num));
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return -EBUSY;
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}
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ret = mmc_io_rw_direct(func->card, 0, 0, SDIO_CCCR_IENx, 0, ®);
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if (ret)
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return ret;
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reg |= 1 << func->num;
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reg |= 1; /* Master interrupt enable */
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ret = mmc_io_rw_direct(func->card, 1, 0, SDIO_CCCR_IENx, reg, NULL);
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if (ret)
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return ret;
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func->irq_handler = handler;
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ret = sdio_card_irq_get(func->card);
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if (ret)
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func->irq_handler = NULL;
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sdio_single_irq_set(func->card);
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return ret;
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}
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//XPORT_SYMBOL_GPL(sdio_claim_irq);
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/**
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* sdio_release_irq - release the IRQ for a SDIO function
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* @func: SDIO function
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*
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* Disable and release the IRQ for the given SDIO function.
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*/
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int sdio_release_irq(struct sdio_func *func)
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{
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int ret;
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unsigned char reg;
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struct mmc_card *card = func->card;
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SD_BUG_ON(!func);
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SD_BUG_ON(!func->card);
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//SDC_LOGD("SDIO: Disabling IRQ for %s...\n", sdio_func_id(func));
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SD_LOGD("SDIO: Disabling IRQ for %ld...\n", HAL_PR_SZ_L(func->num));
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if (func->irq_handler) {
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func->irq_handler = NULL;
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sdio_card_irq_put(func->card);
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sdio_single_irq_set(func->card);
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}
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|
||
|
|
ret = mmc_io_rw_direct(func->card, 0, 0, SDIO_CCCR_IENx, 0, ®);
|
||
|
|
if (ret)
|
||
|
|
return ret;
|
||
|
|
|
||
|
|
reg &= ~(1 << func->num);
|
||
|
|
|
||
|
|
/* Disable master interrupt with the last function interrupt */
|
||
|
|
if (!(reg & 0xFE))
|
||
|
|
reg = 0;
|
||
|
|
|
||
|
|
ret = mmc_io_rw_direct(func->card, 1, 0, SDIO_CCCR_IENx, reg, NULL);
|
||
|
|
if (ret)
|
||
|
|
return ret;
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
//EXPORT_SYMBOL_GPL(sdio_release_irq);
|