From mboxrd@z Thu Jan 1 00:00:00 1970 From: Ulf Hansson Date: Mon, 25 Aug 2014 12:25:53 +0000 Subject: [PATCH 01/12] mmc: tmio: Keep host active while SDIO IRQ is enabled Message-Id: <1408969564-6335-2-git-send-email-ulf.hansson@linaro.org> List-Id: References: <1408969564-6335-1-git-send-email-ulf.hansson@linaro.org> In-Reply-To: <1408969564-6335-1-git-send-email-ulf.hansson@linaro.org> MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: linux-mmc@vger.kernel.org, Ian Molton , Chris Ball Cc: Geert Uytterhoeven , Linux-sh list , linux-kernel@vger.kernel.org, Ulf Hansson The host must be kept active to be able to serve SDIO IRQs, thus let's prevent it from going inactive while SDIO IRQ is enabled. Signed-off-by: Ulf Hansson --- drivers/mmc/host/tmio_mmc.h | 1 + drivers/mmc/host/tmio_mmc_pio.c | 19 +++++++++++++++---- 2 files changed, 16 insertions(+), 4 deletions(-) diff --git a/drivers/mmc/host/tmio_mmc.h b/drivers/mmc/host/tmio_mmc.h index 100ffe0..d6ceb1a 100644 --- a/drivers/mmc/host/tmio_mmc.h +++ b/drivers/mmc/host/tmio_mmc.h @@ -101,6 +101,7 @@ struct tmio_mmc_host { struct mutex ios_lock; /* protect set_ios() context */ bool native_hotplug; bool resuming; + bool sdio_irq_enabled; }; int tmio_mmc_host_probe(struct tmio_mmc_host **host, diff --git a/drivers/mmc/host/tmio_mmc_pio.c b/drivers/mmc/host/tmio_mmc_pio.c index faf0924..5c2e5a3 100644 --- a/drivers/mmc/host/tmio_mmc_pio.c +++ b/drivers/mmc/host/tmio_mmc_pio.c @@ -129,15 +129,22 @@ static void tmio_mmc_enable_sdio_irq(struct mmc_host *mmc, int enable) { struct tmio_mmc_host *host = mmc_priv(mmc); - if (enable) { + if (enable && !host->sdio_irq_enabled) { + /* Keep device active while SDIO irq is enabled */ + pm_runtime_get_sync(mmc_dev(mmc)); + host->sdio_irq_enabled = true; + host->sdio_irq_mask = TMIO_SDIO_MASK_ALL & ~TMIO_SDIO_STAT_IOIRQ; sd_ctrl_write16(host, CTL_TRANSACTION_CTL, 0x0001); sd_ctrl_write16(host, CTL_SDIO_IRQ_MASK, host->sdio_irq_mask); - } else { + } else if (!enable && host->sdio_irq_enabled) { host->sdio_irq_mask = TMIO_SDIO_MASK_ALL; sd_ctrl_write16(host, CTL_SDIO_IRQ_MASK, host->sdio_irq_mask); sd_ctrl_write16(host, CTL_TRANSACTION_CTL, 0x0000); + + host->sdio_irq_enabled = false; + pm_runtime_put(mmc_dev(mmc)); } } @@ -1074,8 +1081,12 @@ int tmio_mmc_host_probe(struct tmio_mmc_host **host, _host->sdcard_irq_mask &= ~irq_mask; - if (pdata->flags & TMIO_MMC_SDIO_IRQ) - tmio_mmc_enable_sdio_irq(mmc, 0); + _host->sdio_irq_enabled = false; + if (pdata->flags & TMIO_MMC_SDIO_IRQ) { + _host->sdio_irq_mask = TMIO_SDIO_MASK_ALL; + sd_ctrl_write16(_host, CTL_SDIO_IRQ_MASK, _host->sdio_irq_mask); + sd_ctrl_write16(_host, CTL_TRANSACTION_CTL, 0x0000); + } spin_lock_init(&_host->lock); mutex_init(&_host->ios_lock); -- 1.9.1