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31 Aug 2023 01:34:54 -0700 Message-ID: Date: Thu, 31 Aug 2023 11:34:51 +0300 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:102.0) Gecko/20100101 Firefox/102.0 Thunderbird/102.15.0 Subject: Re: [PATCH V10 20/23] mmc: sdhci-uhs2: add add_host() and others to set up the driver Content-Language: en-US To: Victor Shih , ulf.hansson@linaro.org Cc: linux-mmc@vger.kernel.org, linux-kernel@vger.kernel.org, benchuanggli@gmail.com, HL.Liu@genesyslogic.com.tw, Greg.tu@genesyslogic.com.tw, takahiro.akashi@linaro.org, dlunev@chromium.org, Ben Chuang , Victor Shih References: <20230818100217.12725-1-victorshihgli@gmail.com> <20230818100217.12725-21-victorshihgli@gmail.com> From: Adrian Hunter Organization: Intel Finland Oy, Registered Address: PL 281, 00181 Helsinki, Business Identity Code: 0357606 - 4, Domiciled in Helsinki In-Reply-To: <20230818100217.12725-21-victorshihgli@gmail.com> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit Precedence: bulk List-ID: X-Mailing-List: linux-mmc@vger.kernel.org On 18/08/23 13:02, Victor Shih wrote: > From: Victor Shih > > This is a UHS-II version of sdhci's add_host/remove_host operation. > Any sdhci drivers which are capable of handling UHS-II cards must > call those functions instead of the corresponding sdhci's. > > Signed-off-by: Ben Chuang > Signed-off-by: AKASHI Takahiro > Signed-off-by: Victor Shih > --- > > Updates in V10: > - Move some definitions of PatchV9[05/23] to PatchV10[20/23]. > > Updates in V8: > - Change return type to void for __sdhci_uhs2_add_host_v4(). > - Remove unused variables in __sdhci_uhs2_add_host_v4(). > > Updates in V7: > - __sdhci_add_host() to instead of __sdhci_uhs2_add_host() > in sdhci_uhs2_add_host(). > - Cancel export state of some functions. > > Updates in V6: > - Add complete_work_fn/thread_irq_fn variables in struct sdhci_host. > - Use complete_work_fn/thread_irq_fn variables in > sdhci_alloc_host() and sdhci_uhs2_add_host(). > - Use sdhci_uhs2_mode() to simplify code in __sdhci_uhs2_remove_host(). > > --- > > drivers/mmc/host/sdhci-uhs2.c | 102 ++++++++++++++++++++++++++++++++++ > drivers/mmc/host/sdhci-uhs2.h | 2 + > drivers/mmc/host/sdhci.c | 7 ++- > drivers/mmc/host/sdhci.h | 3 + > include/linux/mmc/host.h | 1 + > 5 files changed, 113 insertions(+), 2 deletions(-) > > diff --git a/drivers/mmc/host/sdhci-uhs2.c b/drivers/mmc/host/sdhci-uhs2.c > index 8d1be670af49..80eafacc8b9f 100644 > --- a/drivers/mmc/host/sdhci-uhs2.c > +++ b/drivers/mmc/host/sdhci-uhs2.c > @@ -16,6 +16,7 @@ > #include > #include > #include > +#include > > #include "sdhci.h" > #include "sdhci-uhs2.h" > @@ -997,6 +998,107 @@ static irqreturn_t sdhci_uhs2_thread_irq(int irq, void *dev_id) > return IRQ_HANDLED; > } > > +/*****************************************************************************\ > + * > + * Device allocation/registration * > + * * > +\*****************************************************************************/ > + > +static void __sdhci_uhs2_add_host_v4(struct sdhci_host *host, u32 caps1) > +{ > + struct mmc_host *mmc; > + u32 max_current_caps2; > + > + mmc = host->mmc; > + > + /* Support UHS2 */ > + if (caps1 & SDHCI_SUPPORT_UHS2) > + mmc->caps2 |= MMC_CAP2_SD_UHS2; > + > + max_current_caps2 = sdhci_readl(host, SDHCI_MAX_CURRENT_1); > + > + if ((caps1 & SDHCI_CAN_VDD2_180) && > + !max_current_caps2 && > + !IS_ERR(mmc->supply.vmmc2)) { > + /* UHS2 - VDD2 */ > + int curr = regulator_get_current_limit(mmc->supply.vmmc2); > + > + if (curr > 0) { > + /* convert to SDHCI_MAX_CURRENT format */ > + curr = curr / 1000; /* convert to mA */ > + curr = curr / SDHCI_MAX_CURRENT_MULTIPLIER; > + curr = min_t(u32, curr, SDHCI_MAX_CURRENT_LIMIT); > + max_current_caps2 = curr; > + } > + } > + > + if (caps1 & SDHCI_CAN_VDD2_180) > + mmc->ocr_avail_uhs2 |= MMC_VDD_165_195; > + else > + mmc->caps2 &= ~MMC_CAP2_SD_UHS2; > +} > + > +static int sdhci_uhs2_host_ops_init(struct sdhci_host *host); > + > +static void __sdhci_uhs2_remove_host(struct sdhci_host *host, int dead) > +{ > + if (!sdhci_uhs2_mode(host)) > + return; > + > + if (!dead) > + sdhci_uhs2_reset(host, SDHCI_UHS2_SW_RESET_FULL); > +} > + > +int sdhci_uhs2_add_host(struct sdhci_host *host) > +{ > + struct mmc_host *mmc = host->mmc; > + int ret; > + > + ret = sdhci_setup_host(host); > + if (ret) > + return ret; > + > + if (host->version >= SDHCI_SPEC_400) > + __sdhci_uhs2_add_host_v4(host, host->caps1); > + > + if ((mmc->caps2 & MMC_CAP2_SD_UHS2) && !host->v4_mode) > + /* host doesn't want to enable UHS2 support */ > + mmc->caps2 &= ~MMC_CAP2_SD_UHS2; > + > + /* overwrite ops */ > + if (mmc->caps2 & MMC_CAP2_SD_UHS2) > + sdhci_uhs2_host_ops_init(host); > + > + host->complete_work_fn = sdhci_uhs2_complete_work; > + host->thread_irq_fn = sdhci_uhs2_thread_irq; > + > + /* LED support not implemented for UHS2 */ > + host->quirks |= SDHCI_QUIRK_NO_LED; > + > + ret = __sdhci_add_host(host); > + if (ret) > + goto cleanup; > + > + return 0; > + > +cleanup: > + if (host->version >= SDHCI_SPEC_400) > + __sdhci_uhs2_remove_host(host, 0); > + > + sdhci_cleanup_host(host); > + > + return ret; > +} > +EXPORT_SYMBOL_GPL(sdhci_uhs2_add_host); > + > +void sdhci_uhs2_remove_host(struct sdhci_host *host, int dead) > +{ > + __sdhci_uhs2_remove_host(host, dead); > + > + sdhci_remove_host(host, dead); > +} > +EXPORT_SYMBOL_GPL(sdhci_uhs2_remove_host); > + > void sdhci_uhs2_request(struct mmc_host *mmc, struct mmc_request *mrq) > { > struct sdhci_host *host = mmc_priv(mmc); > diff --git a/drivers/mmc/host/sdhci-uhs2.h b/drivers/mmc/host/sdhci-uhs2.h > index 3aa2cb4b39d6..bd5aae054c6f 100644 > --- a/drivers/mmc/host/sdhci-uhs2.h > +++ b/drivers/mmc/host/sdhci-uhs2.h > @@ -186,5 +186,7 @@ void sdhci_uhs2_clear_set_irqs(struct sdhci_host *host, u32 clear, u32 set); > void sdhci_uhs2_request(struct mmc_host *mmc, struct mmc_request *mrq); > int sdhci_uhs2_request_atomic(struct mmc_host *mmc, struct mmc_request *mrq); > u32 sdhci_uhs2_irq(struct sdhci_host *host, u32 intmask); > +int sdhci_uhs2_add_host(struct sdhci_host *host); > +void sdhci_uhs2_remove_host(struct sdhci_host *host, int dead); > > #endif /* __SDHCI_UHS2_H */ > diff --git a/drivers/mmc/host/sdhci.c b/drivers/mmc/host/sdhci.c > index 318d4830732f..b3de7e30ba54 100644 > --- a/drivers/mmc/host/sdhci.c > +++ b/drivers/mmc/host/sdhci.c > @@ -4104,6 +4104,9 @@ struct sdhci_host *sdhci_alloc_host(struct device *dev, > > host->max_timeout_count = 0xE; > > + host->complete_work_fn = sdhci_complete_work; > + host->thread_irq_fn = sdhci_thread_irq; > + > return host; > } > > @@ -4853,7 +4856,7 @@ int __sdhci_add_host(struct sdhci_host *host) > if (!host->complete_wq) > return -ENOMEM; > > - INIT_WORK(&host->complete_work, sdhci_complete_work); > + INIT_WORK(&host->complete_work, host->complete_work_fn); > > timer_setup(&host->timer, sdhci_timeout_timer, 0); > timer_setup(&host->data_timer, sdhci_timeout_data_timer, 0); > @@ -4862,7 +4865,7 @@ int __sdhci_add_host(struct sdhci_host *host) > > sdhci_init(host, 0); > > - ret = request_threaded_irq(host->irq, sdhci_irq, sdhci_thread_irq, > + ret = request_threaded_irq(host->irq, sdhci_irq, host->thread_irq_fn, > IRQF_SHARED, mmc_hostname(mmc), host); > if (ret) { > pr_err("%s: Failed to request IRQ %d: %d\n", > diff --git a/drivers/mmc/host/sdhci.h b/drivers/mmc/host/sdhci.h > index 6bbb9f073f29..5235f2da6568 100644 > --- a/drivers/mmc/host/sdhci.h > +++ b/drivers/mmc/host/sdhci.h > @@ -626,6 +626,9 @@ struct sdhci_host { > struct timer_list timer; /* Timer for timeouts */ > struct timer_list data_timer; /* Timer for data timeouts */ > > + void (*complete_work_fn)(struct work_struct *work); > + irqreturn_t (*thread_irq_fn)(int irq, void *dev_id); > + > #if IS_ENABLED(CONFIG_MMC_SDHCI_EXTERNAL_DMA) > struct dma_chan *rx_chan; > struct dma_chan *tx_chan; > diff --git a/include/linux/mmc/host.h b/include/linux/mmc/host.h > index 1eba64228725..918d4998c1de 100644 > --- a/include/linux/mmc/host.h > +++ b/include/linux/mmc/host.h > @@ -379,6 +379,7 @@ struct mmc_host { > u32 ocr_avail_sdio; /* SDIO-specific OCR */ > u32 ocr_avail_sd; /* SD-specific OCR */ > u32 ocr_avail_mmc; /* MMC-specific OCR */ > + u32 ocr_avail_uhs2; /* UHS2-specific OCR */ ocr_avail_uhs2 gets set but doesn't seem to be used > struct wakeup_source *ws; /* Enable consume of uevents */ > u32 max_current_330; > u32 max_current_300;