| Message ID | 1384761240-11005-3-git-send-email-afenkart@gmail.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
Hi Andreas On Mon, Nov 18, 2013 at 8:53 AM, Andreas Fenkart <afenkart@gmail.com> wrote: > The am335x can't detect pending cirq in PM runtime suspend. > This patch reconfigures dat1 as a GPIO before going to suspend. > SDIO interrupts are detected with the GPIO, the GPIO will only wake > the module from suspend, SDIO irq detection will still happen through the > IP block. > > Idea of remuxing the pins by Tony Lindgren as well as the implementation > of omap_hsmmc_pin_init. > > Signed-off-by: Andreas Fenkart <afenkart@gmail.com> > > diff --git a/Documentation/devicetree/bindings/mmc/ti-omap-hsmmc.txt b/Documentation/devicetree/bindings/mmc/ti-omap-hsmmc.txt > index 1136e6b..146f3ad 100644 > --- a/Documentation/devicetree/bindings/mmc/ti-omap-hsmmc.txt > +++ b/Documentation/devicetree/bindings/mmc/ti-omap-hsmmc.txt > @@ -21,8 +21,11 @@ ti,non-removable: non-removable slot (like eMMC) > ti,needs-special-reset: Requires a special softreset sequence > ti,needs-special-hs-handling: HSMMC IP needs special setting for handling High Speed > ti,quirk-swakup-missing: SOC missing the swakeup line, will not detect > -SDIO irq while in suspend. Fallback to polling. Affected chips are > -am335x, > +SDIO irq while in suspend. The workaround is to reconfigure the dat1 line as a > +GPIO upon suspend. Beyond this option and the GPIO config, you also need to set > +named pinctrl states "default", "active" and "idle ", see example below. The > +MMC driver will then then toggle between default and idle during the runtime > +Affected chips are am335x, > > ------ > | PRCM | > @@ -49,3 +52,24 @@ Example: > vmmc-supply = <&vmmc>; /* phandle to regulator node */ > ti,non-removable; > }; > + > +[am335x with with gpio for sdio irq] > + > + mmc1_cirq_pin: pinmux_cirq_pin { > + pinctrl-single,pins = < > + 0x0f8 0x3f /* MMC0_DAT1 as GPIO2_28 */ > + >; > + }; > + > + mmc1: mmc@48060000 { > + ti,non-removable; > + bus-width = <4>; > + vmmc-supply = <&ldo2_reg>; > + vmmc_aux-supply = <&vmmc>; > + ti,quirk-swakeup-missing; > + pinctrl-names = "default", "active", "idle"; > + pinctrl-0 = <&mmc1_pins>; > + pinctrl-1 = <&mmc1_pins>; > + pinctrl-2 = <&mmc1_cirq_pin>; > + ti,cirq-gpio = <&gpio3 28 0>; > + }; > diff --git a/drivers/mmc/host/omap_hsmmc.c b/drivers/mmc/host/omap_hsmmc.c > index 6b0ec55..b94ab08 100644 > --- a/drivers/mmc/host/omap_hsmmc.c > +++ b/drivers/mmc/host/omap_hsmmc.c > @@ -36,6 +36,7 @@ > #include <linux/mmc/core.h> > #include <linux/mmc/mmc.h> > #include <linux/io.h> > +#include <linux/irq.h> > #include <linux/gpio.h> > #include <linux/regulator/consumer.h> > #include <linux/pinctrl/consumer.h> > @@ -213,11 +214,32 @@ struct omap_hsmmc_host { > int req_in_progress; > int flags; > #define HSMMC_SDIO_IRQ_ENABLED (1 << 0) /* SDIO irq enabled */ > +#define HSMMC_SWAKEUP_QUIRK (1 << 1) > +#define HSMMC_CIRQ_GPIO_ENABLED (1 << 2) > > struct omap_hsmmc_next next_data; > + struct pinctrl *pinctrl; > + struct pinctrl_state *fixed, *active, *idle; > struct omap_mmc_platform_data *pdata; > }; > > +static irqreturn_t omap_hsmmc_cirq(int irq, void *dev_id) > +{ > + struct omap_hsmmc_host *host = dev_id; > + unsigned long flags; > + > + spin_lock_irqsave(&host->irq_lock, flags); > + if (host->flags & HSMMC_CIRQ_GPIO_ENABLED) { > + disable_irq_nosync(mmc_slot(host).sdio_irq); > + host->flags &= ~HSMMC_CIRQ_GPIO_ENABLED; > + } > + spin_unlock_irqrestore(&host->irq_lock, flags); > + > + pm_request_resume(host->dev); /* no use counter */ > + > + return IRQ_HANDLED; > +} > + > static int omap_hsmmc_card_detect(struct device *dev, int slot) > { > struct omap_hsmmc_host *host = dev_get_drvdata(dev); > @@ -452,10 +474,25 @@ static int omap_hsmmc_gpio_init(struct omap_mmc_platform_data *pdata) > } else > pdata->slots[0].gpio_wp = -EINVAL; > > + if (gpio_is_valid(pdata->slots[0].gpio_cirq)) { > + pdata->slots[0].sdio_irq = > + gpio_to_irq(pdata->slots[0].gpio_cirq); What is this? re-assign the platform data? > + ret = gpio_request_one(pdata->slots[0].gpio_cirq, GPIOF_DIR_IN, > + "sdio_cirq"); > + if (ret) > + goto err_free_ro; > + > + } else { > + pdata->slots[0].gpio_cirq = -EINVAL; > + } > + > + > return 0; > > +err_free_ro: > + if (gpio_is_valid(pdata->slots[0].gpio_wp)) > err_free_wp: > - gpio_free(pdata->slots[0].gpio_wp); > + gpio_free(pdata->slots[0].gpio_wp); > err_free_cd: > if (gpio_is_valid(pdata->slots[0].switch_pin)) > err_free_sp: > @@ -469,6 +506,69 @@ static void omap_hsmmc_gpio_free(struct omap_mmc_platform_data *pdata) > gpio_free(pdata->slots[0].gpio_wp); > if (gpio_is_valid(pdata->slots[0].switch_pin)) > gpio_free(pdata->slots[0].switch_pin); > + if (gpio_is_valid(pdata->slots[0].gpio_cirq)) > + gpio_free(pdata->slots[0].gpio_cirq); > +} > + > +static int omap_hsmmc_pin_init(struct omap_hsmmc_host *host) > +{ > + int ret; > + > + host->pinctrl = devm_pinctrl_get(host->dev); > + if (IS_ERR(host->pinctrl)) { > + dev_dbg(host->dev, "no pinctrl handle\n"); > + ret = 0; > + goto out; > + } > + > + host->fixed = pinctrl_lookup_state(host->pinctrl, > + PINCTRL_STATE_DEFAULT); > + if (IS_ERR(host->fixed)) { > + dev_dbg(host->dev, > + "pins are not configured from the driver\n"); > + host->fixed = NULL; > + ret = 0; > + goto out; > + } > + > + ret = pinctrl_select_state(host->pinctrl, host->fixed); > + if (ret < 0) > + goto err; > + > + /* For most cases we don't have wake-ups, and exit after this */ > + host->active = pinctrl_lookup_state(host->pinctrl, "active"); > + if (IS_ERR(host->active)) { > + ret = PTR_ERR(host->active); > + host->active = NULL; > + return 0; > + } > + > + host->idle = pinctrl_lookup_state(host->pinctrl, > + PINCTRL_STATE_IDLE); > + if (IS_ERR(host->idle)) { > + ret = PTR_ERR(host->idle); > + host->idle = NULL; > + goto err; > + } > + > + /* Let's make sure the active and idle states work */ > + ret = pinctrl_select_state(host->pinctrl, host->idle); > + if (ret < 0) > + goto err; > + > + ret = pinctrl_select_state(host->pinctrl, host->active); > + if (ret < 0) > + goto err; > + > + dev_info(mmc_dev(host->mmc), "pins configured for wake-up events\n"); > + > + return 0; > + > +err: > + dev_err(mmc_dev(host->mmc), "pins configuration error: %i\n", ret); > + > +out: > + return ret; > } > > /* > @@ -1791,6 +1891,7 @@ static struct omap_mmc_platform_data *of_get_hsmmc_pdata(struct device *dev) > pdata->nr_slots = 1; > pdata->slots[0].switch_pin = cd_gpio; > pdata->slots[0].gpio_wp = wp_gpio; > + pdata->slots[0].gpio_cirq = of_get_named_gpio(np, "ti,cirq-gpio", 0); I don't have the code in front but why this is assigned in a different way? Michael > > if (of_find_property(np, "ti,non-removable", NULL)) { > pdata->slots[0].nonremovable = true; > @@ -1837,7 +1938,6 @@ static int omap_hsmmc_probe(struct platform_device *pdev) > const struct of_device_id *match; > dma_cap_mask_t mask; > unsigned tx_req, rx_req; > - struct pinctrl *pinctrl; > > match = of_match_device(of_match_ptr(omap_mmc_of_match), &pdev->dev); > if (match) { > @@ -2068,10 +2168,22 @@ static int omap_hsmmc_probe(struct platform_device *pdev) > > omap_hsmmc_disable_irq(host); > > - pinctrl = devm_pinctrl_get_select_default(&pdev->dev); > - if (IS_ERR(pinctrl)) > - dev_warn(&pdev->dev, > - "pins are not configured from the driver\n"); > + ret = omap_hsmmc_pin_init(host); > + if (ret) > + goto err_pinctrl_state; > + > + if ((mmc_slot(host).sdio_irq)) { > + /* prevent auto-enabling of IRQ */ > + irq_set_status_flags(mmc_slot(host).sdio_irq, IRQ_NOAUTOEN); > + ret = request_irq(mmc_slot(host).sdio_irq, omap_hsmmc_cirq, > + IRQF_TRIGGER_LOW | IRQF_ONESHOT, > + mmc_hostname(mmc), host); > + if (ret) { > + dev_dbg(mmc_dev(host->mmc), > + "Unable to grab MMC SDIO IRQ\n"); > + goto err_irq_sdio; > + } > + } > > /* > * For now, only support SDIO interrupt if we are booted with > @@ -2084,8 +2196,14 @@ static int omap_hsmmc_probe(struct platform_device *pdev) > mmc->caps |= MMC_CAP_SDIO_IRQ; > if (of_find_property(host->dev->of_node, > "ti,quirk-swakeup-missing", NULL)) { > - /* no wakeup from deeper power states, use polling */ > - mmc->caps &= ~MMC_CAP_SDIO_IRQ; > + /* use GPIO to wakeup from deeper power states */ > + if (!host->idle || !mmc_slot(host).sdio_irq) { > + dev_err(mmc_dev(host->mmc), > + "Missing GPIO config or pinctrl idle state\n"); > + goto err_irq_sdio; > + } > + > + host->flags |= HSMMC_SWAKEUP_QUIRK; > } > } > > @@ -2113,7 +2231,13 @@ static int omap_hsmmc_probe(struct platform_device *pdev) > > err_slot_name: > mmc_remove_host(mmc); > - free_irq(mmc_slot(host).card_detect_irq, host); > +err_irq_sdio: > + if ((mmc_slot(host).sdio_irq)) > + free_irq(mmc_slot(host).sdio_irq, host); > +err_pinctrl_state: > + devm_pinctrl_put(host->pinctrl); > + if ((mmc_slot(host).card_detect_irq)) > + free_irq(mmc_slot(host).card_detect_irq, host); > err_irq_cd: > if (host->use_reg) > omap_hsmmc_reg_put(host); > @@ -2158,13 +2282,15 @@ static int omap_hsmmc_remove(struct platform_device *pdev) > if (host->pdata->cleanup) > host->pdata->cleanup(&pdev->dev); > free_irq(host->irq, host); > + if ((mmc_slot(host).sdio_irq)) > + free_irq(mmc_slot(host).sdio_irq, host); > if (mmc_slot(host).card_detect_irq) > free_irq(mmc_slot(host).card_detect_irq, host); > - > if (host->tx_chan) > dma_release_channel(host->tx_chan); > if (host->rx_chan) > dma_release_channel(host->rx_chan); > + devm_pinctrl_put(host->pinctrl); > > pm_runtime_put_sync(host->dev); > pm_runtime_disable(host->dev); > @@ -2231,6 +2357,9 @@ static int omap_hsmmc_suspend(struct device *dev) > OMAP_HSMMC_READ(host->base, HCTL) & ~SDBP); > } > > + if (host->flags & HSMMC_SWAKEUP_QUIRK) > + disable_irq(mmc_slot(host).sdio_irq); > + > if (host->dbclk) > clk_disable_unprepare(host->dbclk); > > @@ -2268,6 +2397,9 @@ static int omap_hsmmc_resume(struct device *dev) > if (ret == 0) > host->suspended = 0; > > + if (host->flags & HSMMC_SWAKEUP_QUIRK) > + enable_irq(mmc_slot(host).sdio_irq); > + > pm_runtime_mark_last_busy(host->dev); > pm_runtime_put_autosuspend(host->dev); > > @@ -2285,23 +2417,61 @@ static int omap_hsmmc_resume(struct device *dev) > static int omap_hsmmc_runtime_suspend(struct device *dev) > { > struct omap_hsmmc_host *host; > + unsigned long flags; > + int ret = 0; > > host = platform_get_drvdata(to_platform_device(dev)); > omap_hsmmc_context_save(host); > dev_dbg(dev, "disabled\n"); > > - return 0; > + if (host->flags & HSMMC_SWAKEUP_QUIRK) { > + OMAP_HSMMC_WRITE(host->base, ISE, 0); > + OMAP_HSMMC_WRITE(host->base, IE, 0); > + OMAP_HSMMC_WRITE(host->base, STAT, STAT_CLEAR); > + > + ret = pinctrl_select_state(host->pinctrl, host->idle); > + if (ret < 0) > + dev_warn(mmc_dev(host->mmc), "Unable to select idle pinmux\n"); > + > + spin_lock_irqsave(&host->irq_lock, flags); > + if (host->flags & HSMMC_SDIO_IRQ_ENABLED) { > + enable_irq(mmc_slot(host).sdio_irq); > + host->flags |= HSMMC_CIRQ_GPIO_ENABLED; > + } > + spin_unlock_irqrestore(&host->irq_lock, flags); > + } > + > + return ret; > } > > static int omap_hsmmc_runtime_resume(struct device *dev) > { > struct omap_hsmmc_host *host; > + unsigned long flags; > + int ret = 0; > > host = platform_get_drvdata(to_platform_device(dev)); > omap_hsmmc_context_restore(host); > dev_dbg(dev, "enabled\n"); > > - return 0; > + if (host->flags & HSMMC_SWAKEUP_QUIRK) { > + > + spin_lock_irqsave(&host->irq_lock, flags); > + if (host->flags & HSMMC_CIRQ_GPIO_ENABLED) { > + disable_irq_nosync(mmc_slot(host).sdio_irq); > + host->flags &= ~HSMMC_CIRQ_GPIO_ENABLED; > + } > + spin_unlock_irqrestore(&host->irq_lock, flags); > + > + ret = pinctrl_select_state(host->pinctrl, host->active); > + if (ret < 0) > + dev_warn(mmc_dev(host->mmc), "Unable to select active pinmux\n"); > + > + OMAP_HSMMC_WRITE(host->base, STAT, STAT_CLEAR); > + OMAP_HSMMC_WRITE(host->base, ISE, CIRQ_EN); > + OMAP_HSMMC_WRITE(host->base, IE, CIRQ_EN); > + } > + return ret; > } > > static struct dev_pm_ops omap_hsmmc_dev_pm_ops = { > diff --git a/include/linux/platform_data/mmc-omap.h b/include/linux/platform_data/mmc-omap.h > index 2bf1b30..fd5fff5 100644 > --- a/include/linux/platform_data/mmc-omap.h > +++ b/include/linux/platform_data/mmc-omap.h > @@ -115,6 +115,7 @@ struct omap_mmc_platform_data { > > int switch_pin; /* gpio (card detect) */ > int gpio_wp; /* gpio (write protect) */ > + int gpio_cirq; /* gpio (card irq) */ > > int (*set_bus_mode)(struct device *dev, int slot, int bus_mode); > int (*set_power)(struct device *dev, int slot, > @@ -145,6 +146,9 @@ struct omap_mmc_platform_data { > int card_detect_irq; > int (*card_detect)(struct device *dev, int slot); > > + /* SDIO IRQs */ > + int sdio_irq; > + > unsigned int ban_openended:1; > > } slots[OMAP_MMC_MAX_SLOTS]; > -- > 1.7.10.4 > > -- > To unsubscribe from this list: send the line "unsubscribe linux-omap" in > the body of a message to majordomo@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html -- To unsubscribe from this list: send the line "unsubscribe linux-mmc" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
2013/11/18 Michael Trimarchi <michael@amarulasolutions.com>: > Hi Andreas > > On Mon, Nov 18, 2013 at 8:53 AM, Andreas Fenkart <afenkart@gmail.com> wrote: >> The am335x can't detect pending cirq in PM runtime suspend. >> This patch reconfigures dat1 as a GPIO before going to suspend. >> SDIO interrupts are detected with the GPIO, the GPIO will only wake >> the module from suspend, SDIO irq detection will still happen through the >> IP block. >> >> Idea of remuxing the pins by Tony Lindgren as well as the implementation >> of omap_hsmmc_pin_init. >> >> Signed-off-by: Andreas Fenkart <afenkart@gmail.com> >> >> diff --git a/Documentation/devicetree/bindings/mmc/ti-omap-hsmmc.txt b/Documentation/devicetree/bindings/mmc/ti-omap-hsmmc.txt >> index 1136e6b..146f3ad 100644 >> --- a/Documentation/devicetree/bindings/mmc/ti-omap-hsmmc.txt >> +++ b/Documentation/devicetree/bindings/mmc/ti-omap-hsmmc.txt >> @@ -21,8 +21,11 @@ ti,non-removable: non-removable slot (like eMMC) >> ti,needs-special-reset: Requires a special softreset sequence >> ti,needs-special-hs-handling: HSMMC IP needs special setting for handling High Speed >> ti,quirk-swakup-missing: SOC missing the swakeup line, will not detect >> -SDIO irq while in suspend. Fallback to polling. Affected chips are >> -am335x, >> +SDIO irq while in suspend. The workaround is to reconfigure the dat1 line as a >> +GPIO upon suspend. Beyond this option and the GPIO config, you also need to set >> +named pinctrl states "default", "active" and "idle ", see example below. The >> +MMC driver will then then toggle between default and idle during the runtime >> +Affected chips are am335x, >> >> ------ >> | PRCM | >> @@ -49,3 +52,24 @@ Example: >> vmmc-supply = <&vmmc>; /* phandle to regulator node */ >> ti,non-removable; >> }; >> + >> +[am335x with with gpio for sdio irq] >> + >> + mmc1_cirq_pin: pinmux_cirq_pin { >> + pinctrl-single,pins = < >> + 0x0f8 0x3f /* MMC0_DAT1 as GPIO2_28 */ >> + >; >> + }; >> + >> + mmc1: mmc@48060000 { >> + ti,non-removable; >> + bus-width = <4>; >> + vmmc-supply = <&ldo2_reg>; >> + vmmc_aux-supply = <&vmmc>; >> + ti,quirk-swakeup-missing; >> + pinctrl-names = "default", "active", "idle"; >> + pinctrl-0 = <&mmc1_pins>; >> + pinctrl-1 = <&mmc1_pins>; >> + pinctrl-2 = <&mmc1_cirq_pin>; >> + ti,cirq-gpio = <&gpio3 28 0>; >> + }; >> diff --git a/drivers/mmc/host/omap_hsmmc.c b/drivers/mmc/host/omap_hsmmc.c >> index 6b0ec55..b94ab08 100644 >> --- a/drivers/mmc/host/omap_hsmmc.c >> +++ b/drivers/mmc/host/omap_hsmmc.c >> @@ -36,6 +36,7 @@ >> #include <linux/mmc/core.h> >> #include <linux/mmc/mmc.h> >> #include <linux/io.h> >> +#include <linux/irq.h> >> #include <linux/gpio.h> >> #include <linux/regulator/consumer.h> >> #include <linux/pinctrl/consumer.h> >> @@ -213,11 +214,32 @@ struct omap_hsmmc_host { >> int req_in_progress; >> int flags; >> #define HSMMC_SDIO_IRQ_ENABLED (1 << 0) /* SDIO irq enabled */ >> +#define HSMMC_SWAKEUP_QUIRK (1 << 1) >> +#define HSMMC_CIRQ_GPIO_ENABLED (1 << 2) >> >> struct omap_hsmmc_next next_data; >> + struct pinctrl *pinctrl; >> + struct pinctrl_state *fixed, *active, *idle; >> struct omap_mmc_platform_data *pdata; >> }; >> >> +static irqreturn_t omap_hsmmc_cirq(int irq, void *dev_id) >> +{ >> + struct omap_hsmmc_host *host = dev_id; >> + unsigned long flags; >> + >> + spin_lock_irqsave(&host->irq_lock, flags); >> + if (host->flags & HSMMC_CIRQ_GPIO_ENABLED) { >> + disable_irq_nosync(mmc_slot(host).sdio_irq); >> + host->flags &= ~HSMMC_CIRQ_GPIO_ENABLED; >> + } >> + spin_unlock_irqrestore(&host->irq_lock, flags); >> + >> + pm_request_resume(host->dev); /* no use counter */ >> + >> + return IRQ_HANDLED; >> +} >> + >> static int omap_hsmmc_card_detect(struct device *dev, int slot) >> { >> struct omap_hsmmc_host *host = dev_get_drvdata(dev); >> @@ -452,10 +474,25 @@ static int omap_hsmmc_gpio_init(struct omap_mmc_platform_data *pdata) >> } else >> pdata->slots[0].gpio_wp = -EINVAL; >> >> + if (gpio_is_valid(pdata->slots[0].gpio_cirq)) { >> + pdata->slots[0].sdio_irq = >> + gpio_to_irq(pdata->slots[0].gpio_cirq); > > What is this? re-assign the platform data? Seems like, I didn't pay attention to this. Simply kept in line how the write protection/read only pins are managed. I'd rather not change this part, or not changing it as part of adding sdio IRQ support it. Maybe somebody else on the list can explain why the platform data contains elements that are modified during runtime. - set_power / get_ro function callbacks - ocr_mask. > >> + ret = gpio_request_one(pdata->slots[0].gpio_cirq, GPIOF_DIR_IN, >> + "sdio_cirq"); >> + if (ret) >> + goto err_free_ro; >> + >> + } else { >> + pdata->slots[0].gpio_cirq = -EINVAL; >> + } >> + >> + >> return 0; >> >> +err_free_ro: >> + if (gpio_is_valid(pdata->slots[0].gpio_wp)) >> err_free_wp: >> - gpio_free(pdata->slots[0].gpio_wp); >> + gpio_free(pdata->slots[0].gpio_wp); >> err_free_cd: >> if (gpio_is_valid(pdata->slots[0].switch_pin)) >> err_free_sp: >> @@ -469,6 +506,69 @@ static void omap_hsmmc_gpio_free(struct omap_mmc_platform_data *pdata) >> gpio_free(pdata->slots[0].gpio_wp); >> if (gpio_is_valid(pdata->slots[0].switch_pin)) >> gpio_free(pdata->slots[0].switch_pin); >> + if (gpio_is_valid(pdata->slots[0].gpio_cirq)) >> + gpio_free(pdata->slots[0].gpio_cirq); >> +} >> + >> +static int omap_hsmmc_pin_init(struct omap_hsmmc_host *host) >> +{ >> + int ret; >> + >> + host->pinctrl = devm_pinctrl_get(host->dev); >> + if (IS_ERR(host->pinctrl)) { >> + dev_dbg(host->dev, "no pinctrl handle\n"); >> + ret = 0; >> + goto out; >> + } >> + >> + host->fixed = pinctrl_lookup_state(host->pinctrl, >> + PINCTRL_STATE_DEFAULT); >> + if (IS_ERR(host->fixed)) { >> + dev_dbg(host->dev, >> + "pins are not configured from the driver\n"); >> + host->fixed = NULL; >> + ret = 0; >> + goto out; >> + } >> + >> + ret = pinctrl_select_state(host->pinctrl, host->fixed); >> + if (ret < 0) >> + goto err; >> + >> + /* For most cases we don't have wake-ups, and exit after this */ >> + host->active = pinctrl_lookup_state(host->pinctrl, "active"); >> + if (IS_ERR(host->active)) { >> + ret = PTR_ERR(host->active); >> + host->active = NULL; >> + return 0; >> + } >> + >> + host->idle = pinctrl_lookup_state(host->pinctrl, >> + PINCTRL_STATE_IDLE); >> + if (IS_ERR(host->idle)) { >> + ret = PTR_ERR(host->idle); >> + host->idle = NULL; >> + goto err; >> + } >> + >> + /* Let's make sure the active and idle states work */ >> + ret = pinctrl_select_state(host->pinctrl, host->idle); >> + if (ret < 0) >> + goto err; >> + >> + ret = pinctrl_select_state(host->pinctrl, host->active); >> + if (ret < 0) >> + goto err; >> + >> + dev_info(mmc_dev(host->mmc), "pins configured for wake-up events\n"); >> + >> + return 0; >> + >> +err: >> + dev_err(mmc_dev(host->mmc), "pins configuration error: %i\n", ret); >> + >> +out: >> + return ret; >> } >> >> /* >> @@ -1791,6 +1891,7 @@ static struct omap_mmc_platform_data *of_get_hsmmc_pdata(struct device *dev) >> pdata->nr_slots = 1; int cd_gpio, wp_gpio; cd_gpio = of_get_named_gpio(np, "cd-gpios", 0); wp_gpio = of_get_named_gpio(np, "wp-gpios", 0); >> pdata->slots[0].switch_pin = cd_gpio; >> pdata->slots[0].gpio_wp = wp_gpio; >> + pdata->slots[0].gpio_cirq = of_get_named_gpio(np, "ti,cirq-gpio", 0); > > I don't have the code in front but why this is assigned in a different way? it's shorter > > Michael > >> >> if (of_find_property(np, "ti,non-removable", NULL)) { >> pdata->slots[0].nonremovable = true; >> @@ -1837,7 +1938,6 @@ static int omap_hsmmc_probe(struct platform_device *pdev) >> const struct of_device_id *match; >> dma_cap_mask_t mask; >> unsigned tx_req, rx_req; >> - struct pinctrl *pinctrl; >> >> match = of_match_device(of_match_ptr(omap_mmc_of_match), &pdev->dev); >> if (match) { >> @@ -2068,10 +2168,22 @@ static int omap_hsmmc_probe(struct platform_device *pdev) >> >> omap_hsmmc_disable_irq(host); >> >> - pinctrl = devm_pinctrl_get_select_default(&pdev->dev); >> - if (IS_ERR(pinctrl)) >> - dev_warn(&pdev->dev, >> - "pins are not configured from the driver\n"); >> + ret = omap_hsmmc_pin_init(host); >> + if (ret) >> + goto err_pinctrl_state; >> + >> + if ((mmc_slot(host).sdio_irq)) { >> + /* prevent auto-enabling of IRQ */ >> + irq_set_status_flags(mmc_slot(host).sdio_irq, IRQ_NOAUTOEN); >> + ret = request_irq(mmc_slot(host).sdio_irq, omap_hsmmc_cirq, >> + IRQF_TRIGGER_LOW | IRQF_ONESHOT, >> + mmc_hostname(mmc), host); >> + if (ret) { >> + dev_dbg(mmc_dev(host->mmc), >> + "Unable to grab MMC SDIO IRQ\n"); >> + goto err_irq_sdio; >> + } >> + } >> >> /* >> * For now, only support SDIO interrupt if we are booted with >> @@ -2084,8 +2196,14 @@ static int omap_hsmmc_probe(struct platform_device *pdev) >> mmc->caps |= MMC_CAP_SDIO_IRQ; >> if (of_find_property(host->dev->of_node, >> "ti,quirk-swakeup-missing", NULL)) { >> - /* no wakeup from deeper power states, use polling */ >> - mmc->caps &= ~MMC_CAP_SDIO_IRQ; >> + /* use GPIO to wakeup from deeper power states */ >> + if (!host->idle || !mmc_slot(host).sdio_irq) { >> + dev_err(mmc_dev(host->mmc), >> + "Missing GPIO config or pinctrl idle state\n"); >> + goto err_irq_sdio; >> + } >> + >> + host->flags |= HSMMC_SWAKEUP_QUIRK; >> } >> } >> >> @@ -2113,7 +2231,13 @@ static int omap_hsmmc_probe(struct platform_device *pdev) >> >> err_slot_name: >> mmc_remove_host(mmc); >> - free_irq(mmc_slot(host).card_detect_irq, host); >> +err_irq_sdio: >> + if ((mmc_slot(host).sdio_irq)) >> + free_irq(mmc_slot(host).sdio_irq, host); >> +err_pinctrl_state: >> + devm_pinctrl_put(host->pinctrl); >> + if ((mmc_slot(host).card_detect_irq)) >> + free_irq(mmc_slot(host).card_detect_irq, host); >> err_irq_cd: >> if (host->use_reg) >> omap_hsmmc_reg_put(host); >> @@ -2158,13 +2282,15 @@ static int omap_hsmmc_remove(struct platform_device *pdev) >> if (host->pdata->cleanup) >> host->pdata->cleanup(&pdev->dev); >> free_irq(host->irq, host); >> + if ((mmc_slot(host).sdio_irq)) >> + free_irq(mmc_slot(host).sdio_irq, host); >> if (mmc_slot(host).card_detect_irq) >> free_irq(mmc_slot(host).card_detect_irq, host); >> - >> if (host->tx_chan) >> dma_release_channel(host->tx_chan); >> if (host->rx_chan) >> dma_release_channel(host->rx_chan); >> + devm_pinctrl_put(host->pinctrl); >> >> pm_runtime_put_sync(host->dev); >> pm_runtime_disable(host->dev); >> @@ -2231,6 +2357,9 @@ static int omap_hsmmc_suspend(struct device *dev) >> OMAP_HSMMC_READ(host->base, HCTL) & ~SDBP); >> } >> >> + if (host->flags & HSMMC_SWAKEUP_QUIRK) >> + disable_irq(mmc_slot(host).sdio_irq); >> + >> if (host->dbclk) >> clk_disable_unprepare(host->dbclk); >> >> @@ -2268,6 +2397,9 @@ static int omap_hsmmc_resume(struct device *dev) >> if (ret == 0) >> host->suspended = 0; >> >> + if (host->flags & HSMMC_SWAKEUP_QUIRK) >> + enable_irq(mmc_slot(host).sdio_irq); >> + >> pm_runtime_mark_last_busy(host->dev); >> pm_runtime_put_autosuspend(host->dev); >> >> @@ -2285,23 +2417,61 @@ static int omap_hsmmc_resume(struct device *dev) >> static int omap_hsmmc_runtime_suspend(struct device *dev) >> { >> struct omap_hsmmc_host *host; >> + unsigned long flags; >> + int ret = 0; >> >> host = platform_get_drvdata(to_platform_device(dev)); >> omap_hsmmc_context_save(host); >> dev_dbg(dev, "disabled\n"); >> >> - return 0; >> + if (host->flags & HSMMC_SWAKEUP_QUIRK) { >> + OMAP_HSMMC_WRITE(host->base, ISE, 0); >> + OMAP_HSMMC_WRITE(host->base, IE, 0); >> + OMAP_HSMMC_WRITE(host->base, STAT, STAT_CLEAR); >> + >> + ret = pinctrl_select_state(host->pinctrl, host->idle); >> + if (ret < 0) >> + dev_warn(mmc_dev(host->mmc), "Unable to select idle pinmux\n"); >> + >> + spin_lock_irqsave(&host->irq_lock, flags); >> + if (host->flags & HSMMC_SDIO_IRQ_ENABLED) { >> + enable_irq(mmc_slot(host).sdio_irq); >> + host->flags |= HSMMC_CIRQ_GPIO_ENABLED; >> + } >> + spin_unlock_irqrestore(&host->irq_lock, flags); >> + } >> + >> + return ret; >> } >> >> static int omap_hsmmc_runtime_resume(struct device *dev) >> { >> struct omap_hsmmc_host *host; >> + unsigned long flags; >> + int ret = 0; >> >> host = platform_get_drvdata(to_platform_device(dev)); >> omap_hsmmc_context_restore(host); >> dev_dbg(dev, "enabled\n"); >> >> - return 0; >> + if (host->flags & HSMMC_SWAKEUP_QUIRK) { >> + >> + spin_lock_irqsave(&host->irq_lock, flags); >> + if (host->flags & HSMMC_CIRQ_GPIO_ENABLED) { >> + disable_irq_nosync(mmc_slot(host).sdio_irq); >> + host->flags &= ~HSMMC_CIRQ_GPIO_ENABLED; >> + } >> + spin_unlock_irqrestore(&host->irq_lock, flags); >> + >> + ret = pinctrl_select_state(host->pinctrl, host->active); >> + if (ret < 0) >> + dev_warn(mmc_dev(host->mmc), "Unable to select active pinmux\n"); >> + >> + OMAP_HSMMC_WRITE(host->base, STAT, STAT_CLEAR); >> + OMAP_HSMMC_WRITE(host->base, ISE, CIRQ_EN); >> + OMAP_HSMMC_WRITE(host->base, IE, CIRQ_EN); >> + } >> + return ret; >> } >> >> static struct dev_pm_ops omap_hsmmc_dev_pm_ops = { >> diff --git a/include/linux/platform_data/mmc-omap.h b/include/linux/platform_data/mmc-omap.h >> index 2bf1b30..fd5fff5 100644 >> --- a/include/linux/platform_data/mmc-omap.h >> +++ b/include/linux/platform_data/mmc-omap.h >> @@ -115,6 +115,7 @@ struct omap_mmc_platform_data { >> >> int switch_pin; /* gpio (card detect) */ >> int gpio_wp; /* gpio (write protect) */ >> + int gpio_cirq; /* gpio (card irq) */ >> >> int (*set_bus_mode)(struct device *dev, int slot, int bus_mode); >> int (*set_power)(struct device *dev, int slot, >> @@ -145,6 +146,9 @@ struct omap_mmc_platform_data { >> int card_detect_irq; >> int (*card_detect)(struct device *dev, int slot); >> >> + /* SDIO IRQs */ >> + int sdio_irq; >> + >> unsigned int ban_openended:1; >> >> } slots[OMAP_MMC_MAX_SLOTS]; >> -- >> 1.7.10.4 >> >> -- >> To unsubscribe from this list: send the line "unsubscribe linux-omap" in >> the body of a message to majordomo@vger.kernel.org >> More majordomo info at http://vger.kernel.org/majordomo-info.html -- To unsubscribe from this list: send the line "unsubscribe linux-mmc" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
On Monday 18 November 2013 05:45 PM, Andreas Fenkart wrote: > 2013/11/18 Michael Trimarchi <michael@amarulasolutions.com>: >> Hi Andreas >> >> On Mon, Nov 18, 2013 at 8:53 AM, Andreas Fenkart <afenkart@gmail.com> wrote: >>> The am335x can't detect pending cirq in PM runtime suspend. >>> This patch reconfigures dat1 as a GPIO before going to suspend. >>> SDIO interrupts are detected with the GPIO, the GPIO will only wake >>> the module from suspend, SDIO irq detection will still happen through the >>> IP block. >>> >>> Idea of remuxing the pins by Tony Lindgren as well as the implementation >>> of omap_hsmmc_pin_init. >>> >>> Signed-off-by: Andreas Fenkart <afenkart@gmail.com> >>> >>> diff --git a/Documentation/devicetree/bindings/mmc/ti-omap-hsmmc.txt b/Documentation/devicetree/bindings/mmc/ti-omap-hsmmc.txt >>> index 1136e6b..146f3ad 100644 >>> --- a/Documentation/devicetree/bindings/mmc/ti-omap-hsmmc.txt >>> +++ b/Documentation/devicetree/bindings/mmc/ti-omap-hsmmc.txt >>> @@ -21,8 +21,11 @@ ti,non-removable: non-removable slot (like eMMC) >>> ti,needs-special-reset: Requires a special softreset sequence >>> ti,needs-special-hs-handling: HSMMC IP needs special setting for handling High Speed >>> ti,quirk-swakup-missing: SOC missing the swakeup line, will not detect >>> -SDIO irq while in suspend. Fallback to polling. Affected chips are >>> -am335x, >>> +SDIO irq while in suspend. The workaround is to reconfigure the dat1 line as a >>> +GPIO upon suspend. Beyond this option and the GPIO config, you also need to set >>> +named pinctrl states "default", "active" and "idle ", see example below. The >>> +MMC driver will then then toggle between default and idle during the runtime >>> +Affected chips are am335x, >>> >>> ------ >>> | PRCM | >>> @@ -49,3 +52,24 @@ Example: >>> vmmc-supply = <&vmmc>; /* phandle to regulator node */ >>> ti,non-removable; >>> }; >>> + >>> +[am335x with with gpio for sdio irq] >>> + >>> + mmc1_cirq_pin: pinmux_cirq_pin { >>> + pinctrl-single,pins = < >>> + 0x0f8 0x3f /* MMC0_DAT1 as GPIO2_28 */ >>> + >; >>> + }; >>> + >>> + mmc1: mmc@48060000 { >>> + ti,non-removable; >>> + bus-width = <4>; >>> + vmmc-supply = <&ldo2_reg>; >>> + vmmc_aux-supply = <&vmmc>; >>> + ti,quirk-swakeup-missing; >>> + pinctrl-names = "default", "active", "idle"; >>> + pinctrl-0 = <&mmc1_pins>; >>> + pinctrl-1 = <&mmc1_pins>; >>> + pinctrl-2 = <&mmc1_cirq_pin>; >>> + ti,cirq-gpio = <&gpio3 28 0>; >>> + }; >>> diff --git a/drivers/mmc/host/omap_hsmmc.c b/drivers/mmc/host/omap_hsmmc.c >>> index 6b0ec55..b94ab08 100644 >>> --- a/drivers/mmc/host/omap_hsmmc.c >>> +++ b/drivers/mmc/host/omap_hsmmc.c >>> @@ -36,6 +36,7 @@ >>> #include <linux/mmc/core.h> >>> #include <linux/mmc/mmc.h> >>> #include <linux/io.h> >>> +#include <linux/irq.h> >>> #include <linux/gpio.h> >>> #include <linux/regulator/consumer.h> >>> #include <linux/pinctrl/consumer.h> >>> @@ -213,11 +214,32 @@ struct omap_hsmmc_host { >>> int req_in_progress; >>> int flags; >>> #define HSMMC_SDIO_IRQ_ENABLED (1 << 0) /* SDIO irq enabled */ >>> +#define HSMMC_SWAKEUP_QUIRK (1 << 1) >>> +#define HSMMC_CIRQ_GPIO_ENABLED (1 << 2) >>> >>> struct omap_hsmmc_next next_data; >>> + struct pinctrl *pinctrl; >>> + struct pinctrl_state *fixed, *active, *idle; >>> struct omap_mmc_platform_data *pdata; >>> }; >>> >>> +static irqreturn_t omap_hsmmc_cirq(int irq, void *dev_id) >>> +{ >>> + struct omap_hsmmc_host *host = dev_id; >>> + unsigned long flags; >>> + >>> + spin_lock_irqsave(&host->irq_lock, flags); >>> + if (host->flags & HSMMC_CIRQ_GPIO_ENABLED) { >>> + disable_irq_nosync(mmc_slot(host).sdio_irq); >>> + host->flags &= ~HSMMC_CIRQ_GPIO_ENABLED; >>> + } >>> + spin_unlock_irqrestore(&host->irq_lock, flags); >>> + >>> + pm_request_resume(host->dev); /* no use counter */ >>> + >>> + return IRQ_HANDLED; >>> +} >>> + >>> static int omap_hsmmc_card_detect(struct device *dev, int slot) >>> { >>> struct omap_hsmmc_host *host = dev_get_drvdata(dev); >>> @@ -452,10 +474,25 @@ static int omap_hsmmc_gpio_init(struct omap_mmc_platform_data *pdata) >>> } else >>> pdata->slots[0].gpio_wp = -EINVAL; >>> >>> + if (gpio_is_valid(pdata->slots[0].gpio_cirq)) { >>> + pdata->slots[0].sdio_irq = >>> + gpio_to_irq(pdata->slots[0].gpio_cirq); >> >> What is this? re-assign the platform data? > > Seems like, I didn't pay attention to this. > Simply kept in line how the write protection/read only pins are managed. > I'd rather not change this part, or not changing it as part of adding > sdio IRQ support it. > > Maybe somebody else on the list can explain why the platform data > contains elements > that are modified during runtime. > > - set_power / get_ro function callbacks > - ocr_mask. > Hi, few params were passed via platform data in non-DT case and never cached in internal data structure, with non-dt support going away soon, I am planning to cleanup pdata usage in the driver when it gets to DT only support. -- To unsubscribe from this list: send the line "unsubscribe linux-mmc" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
On 18 November 2013 08:53, Andreas Fenkart <afenkart@gmail.com> wrote: > The am335x can't detect pending cirq in PM runtime suspend. > This patch reconfigures dat1 as a GPIO before going to suspend. > SDIO interrupts are detected with the GPIO, the GPIO will only wake > the module from suspend, SDIO irq detection will still happen through the > IP block. > > Idea of remuxing the pins by Tony Lindgren as well as the implementation > of omap_hsmmc_pin_init. > > Signed-off-by: Andreas Fenkart <afenkart@gmail.com> > > diff --git a/Documentation/devicetree/bindings/mmc/ti-omap-hsmmc.txt b/Documentation/devicetree/bindings/mmc/ti-omap-hsmmc.txt > index 1136e6b..146f3ad 100644 > --- a/Documentation/devicetree/bindings/mmc/ti-omap-hsmmc.txt > +++ b/Documentation/devicetree/bindings/mmc/ti-omap-hsmmc.txt > @@ -21,8 +21,11 @@ ti,non-removable: non-removable slot (like eMMC) > ti,needs-special-reset: Requires a special softreset sequence > ti,needs-special-hs-handling: HSMMC IP needs special setting for handling High Speed > ti,quirk-swakup-missing: SOC missing the swakeup line, will not detect > -SDIO irq while in suspend. Fallback to polling. Affected chips are > -am335x, > +SDIO irq while in suspend. The workaround is to reconfigure the dat1 line as a > +GPIO upon suspend. Beyond this option and the GPIO config, you also need to set > +named pinctrl states "default", "active" and "idle ", see example below. The > +MMC driver will then then toggle between default and idle during the runtime > +Affected chips are am335x, > > ------ > | PRCM | > @@ -49,3 +52,24 @@ Example: > vmmc-supply = <&vmmc>; /* phandle to regulator node */ > ti,non-removable; > }; > + > +[am335x with with gpio for sdio irq] > + > + mmc1_cirq_pin: pinmux_cirq_pin { > + pinctrl-single,pins = < > + 0x0f8 0x3f /* MMC0_DAT1 as GPIO2_28 */ > + >; > + }; > + > + mmc1: mmc@48060000 { > + ti,non-removable; > + bus-width = <4>; > + vmmc-supply = <&ldo2_reg>; > + vmmc_aux-supply = <&vmmc>; > + ti,quirk-swakeup-missing; > + pinctrl-names = "default", "active", "idle"; > + pinctrl-0 = <&mmc1_pins>; > + pinctrl-1 = <&mmc1_pins>; > + pinctrl-2 = <&mmc1_cirq_pin>; > + ti,cirq-gpio = <&gpio3 28 0>; > + }; > diff --git a/drivers/mmc/host/omap_hsmmc.c b/drivers/mmc/host/omap_hsmmc.c > index 6b0ec55..b94ab08 100644 > --- a/drivers/mmc/host/omap_hsmmc.c > +++ b/drivers/mmc/host/omap_hsmmc.c > @@ -36,6 +36,7 @@ > #include <linux/mmc/core.h> > #include <linux/mmc/mmc.h> > #include <linux/io.h> > +#include <linux/irq.h> > #include <linux/gpio.h> > #include <linux/regulator/consumer.h> > #include <linux/pinctrl/consumer.h> > @@ -213,11 +214,32 @@ struct omap_hsmmc_host { > int req_in_progress; > int flags; > #define HSMMC_SDIO_IRQ_ENABLED (1 << 0) /* SDIO irq enabled */ > +#define HSMMC_SWAKEUP_QUIRK (1 << 1) > +#define HSMMC_CIRQ_GPIO_ENABLED (1 << 2) > > struct omap_hsmmc_next next_data; > + struct pinctrl *pinctrl; > + struct pinctrl_state *fixed, *active, *idle; > struct omap_mmc_platform_data *pdata; > }; > > +static irqreturn_t omap_hsmmc_cirq(int irq, void *dev_id) > +{ > + struct omap_hsmmc_host *host = dev_id; > + unsigned long flags; > + > + spin_lock_irqsave(&host->irq_lock, flags); > + if (host->flags & HSMMC_CIRQ_GPIO_ENABLED) { > + disable_irq_nosync(mmc_slot(host).sdio_irq); > + host->flags &= ~HSMMC_CIRQ_GPIO_ENABLED; > + } > + spin_unlock_irqrestore(&host->irq_lock, flags); > + > + pm_request_resume(host->dev); /* no use counter */ In the case were you are not waking up from system suspend, but from runtime suspend, you likely want to signal the SDIO irq as soon as possible. Then you should use mmc_signal_sdio_irq instead. In the other case, when waking up from system suspend, you should be able to completely rely on that the mmc_sdio_resume from the core layer, will handle the IRQ. Kind regards Ulf Hansson > + > + return IRQ_HANDLED; > +} > + > static int omap_hsmmc_card_detect(struct device *dev, int slot) > { > struct omap_hsmmc_host *host = dev_get_drvdata(dev); > @@ -452,10 +474,25 @@ static int omap_hsmmc_gpio_init(struct omap_mmc_platform_data *pdata) > } else > pdata->slots[0].gpio_wp = -EINVAL; > > + if (gpio_is_valid(pdata->slots[0].gpio_cirq)) { > + pdata->slots[0].sdio_irq = > + gpio_to_irq(pdata->slots[0].gpio_cirq); > + ret = gpio_request_one(pdata->slots[0].gpio_cirq, GPIOF_DIR_IN, > + "sdio_cirq"); > + if (ret) > + goto err_free_ro; > + > + } else { > + pdata->slots[0].gpio_cirq = -EINVAL; > + } > + > + > return 0; > > +err_free_ro: > + if (gpio_is_valid(pdata->slots[0].gpio_wp)) > err_free_wp: > - gpio_free(pdata->slots[0].gpio_wp); > + gpio_free(pdata->slots[0].gpio_wp); > err_free_cd: > if (gpio_is_valid(pdata->slots[0].switch_pin)) > err_free_sp: > @@ -469,6 +506,69 @@ static void omap_hsmmc_gpio_free(struct omap_mmc_platform_data *pdata) > gpio_free(pdata->slots[0].gpio_wp); > if (gpio_is_valid(pdata->slots[0].switch_pin)) > gpio_free(pdata->slots[0].switch_pin); > + if (gpio_is_valid(pdata->slots[0].gpio_cirq)) > + gpio_free(pdata->slots[0].gpio_cirq); > +} > + > +static int omap_hsmmc_pin_init(struct omap_hsmmc_host *host) > +{ > + int ret; > + > + host->pinctrl = devm_pinctrl_get(host->dev); > + if (IS_ERR(host->pinctrl)) { > + dev_dbg(host->dev, "no pinctrl handle\n"); > + ret = 0; > + goto out; > + } > + > + host->fixed = pinctrl_lookup_state(host->pinctrl, > + PINCTRL_STATE_DEFAULT); > + if (IS_ERR(host->fixed)) { > + dev_dbg(host->dev, > + "pins are not configured from the driver\n"); > + host->fixed = NULL; > + ret = 0; > + goto out; > + } > + > + ret = pinctrl_select_state(host->pinctrl, host->fixed); > + if (ret < 0) > + goto err; > + > + /* For most cases we don't have wake-ups, and exit after this */ > + host->active = pinctrl_lookup_state(host->pinctrl, "active"); > + if (IS_ERR(host->active)) { > + ret = PTR_ERR(host->active); > + host->active = NULL; > + return 0; > + } > + > + host->idle = pinctrl_lookup_state(host->pinctrl, > + PINCTRL_STATE_IDLE); > + if (IS_ERR(host->idle)) { > + ret = PTR_ERR(host->idle); > + host->idle = NULL; > + goto err; > + } > + > + /* Let's make sure the active and idle states work */ > + ret = pinctrl_select_state(host->pinctrl, host->idle); > + if (ret < 0) > + goto err; > + > + ret = pinctrl_select_state(host->pinctrl, host->active); > + if (ret < 0) > + goto err; > + > + dev_info(mmc_dev(host->mmc), "pins configured for wake-up events\n"); > + > + return 0; > + > +err: > + dev_err(mmc_dev(host->mmc), "pins configuration error: %i\n", ret); > + > +out: > + return ret; > } > > /* > @@ -1791,6 +1891,7 @@ static struct omap_mmc_platform_data *of_get_hsmmc_pdata(struct device *dev) > pdata->nr_slots = 1; > pdata->slots[0].switch_pin = cd_gpio; > pdata->slots[0].gpio_wp = wp_gpio; > + pdata->slots[0].gpio_cirq = of_get_named_gpio(np, "ti,cirq-gpio", 0); > > if (of_find_property(np, "ti,non-removable", NULL)) { > pdata->slots[0].nonremovable = true; > @@ -1837,7 +1938,6 @@ static int omap_hsmmc_probe(struct platform_device *pdev) > const struct of_device_id *match; > dma_cap_mask_t mask; > unsigned tx_req, rx_req; > - struct pinctrl *pinctrl; > > match = of_match_device(of_match_ptr(omap_mmc_of_match), &pdev->dev); > if (match) { > @@ -2068,10 +2168,22 @@ static int omap_hsmmc_probe(struct platform_device *pdev) > > omap_hsmmc_disable_irq(host); > > - pinctrl = devm_pinctrl_get_select_default(&pdev->dev); > - if (IS_ERR(pinctrl)) > - dev_warn(&pdev->dev, > - "pins are not configured from the driver\n"); > + ret = omap_hsmmc_pin_init(host); > + if (ret) > + goto err_pinctrl_state; > + > + if ((mmc_slot(host).sdio_irq)) { > + /* prevent auto-enabling of IRQ */ > + irq_set_status_flags(mmc_slot(host).sdio_irq, IRQ_NOAUTOEN); > + ret = request_irq(mmc_slot(host).sdio_irq, omap_hsmmc_cirq, > + IRQF_TRIGGER_LOW | IRQF_ONESHOT, > + mmc_hostname(mmc), host); > + if (ret) { > + dev_dbg(mmc_dev(host->mmc), > + "Unable to grab MMC SDIO IRQ\n"); > + goto err_irq_sdio; > + } > + } > > /* > * For now, only support SDIO interrupt if we are booted with > @@ -2084,8 +2196,14 @@ static int omap_hsmmc_probe(struct platform_device *pdev) > mmc->caps |= MMC_CAP_SDIO_IRQ; > if (of_find_property(host->dev->of_node, > "ti,quirk-swakeup-missing", NULL)) { > - /* no wakeup from deeper power states, use polling */ > - mmc->caps &= ~MMC_CAP_SDIO_IRQ; > + /* use GPIO to wakeup from deeper power states */ > + if (!host->idle || !mmc_slot(host).sdio_irq) { > + dev_err(mmc_dev(host->mmc), > + "Missing GPIO config or pinctrl idle state\n"); > + goto err_irq_sdio; > + } > + > + host->flags |= HSMMC_SWAKEUP_QUIRK; > } > } > > @@ -2113,7 +2231,13 @@ static int omap_hsmmc_probe(struct platform_device *pdev) > > err_slot_name: > mmc_remove_host(mmc); > - free_irq(mmc_slot(host).card_detect_irq, host); > +err_irq_sdio: > + if ((mmc_slot(host).sdio_irq)) > + free_irq(mmc_slot(host).sdio_irq, host); > +err_pinctrl_state: > + devm_pinctrl_put(host->pinctrl); > + if ((mmc_slot(host).card_detect_irq)) > + free_irq(mmc_slot(host).card_detect_irq, host); > err_irq_cd: > if (host->use_reg) > omap_hsmmc_reg_put(host); > @@ -2158,13 +2282,15 @@ static int omap_hsmmc_remove(struct platform_device *pdev) > if (host->pdata->cleanup) > host->pdata->cleanup(&pdev->dev); > free_irq(host->irq, host); > + if ((mmc_slot(host).sdio_irq)) > + free_irq(mmc_slot(host).sdio_irq, host); > if (mmc_slot(host).card_detect_irq) > free_irq(mmc_slot(host).card_detect_irq, host); > - > if (host->tx_chan) > dma_release_channel(host->tx_chan); > if (host->rx_chan) > dma_release_channel(host->rx_chan); > + devm_pinctrl_put(host->pinctrl); > > pm_runtime_put_sync(host->dev); > pm_runtime_disable(host->dev); > @@ -2231,6 +2357,9 @@ static int omap_hsmmc_suspend(struct device *dev) > OMAP_HSMMC_READ(host->base, HCTL) & ~SDBP); > } > > + if (host->flags & HSMMC_SWAKEUP_QUIRK) > + disable_irq(mmc_slot(host).sdio_irq); > + > if (host->dbclk) > clk_disable_unprepare(host->dbclk); > > @@ -2268,6 +2397,9 @@ static int omap_hsmmc_resume(struct device *dev) > if (ret == 0) > host->suspended = 0; > > + if (host->flags & HSMMC_SWAKEUP_QUIRK) > + enable_irq(mmc_slot(host).sdio_irq); > + > pm_runtime_mark_last_busy(host->dev); > pm_runtime_put_autosuspend(host->dev); > > @@ -2285,23 +2417,61 @@ static int omap_hsmmc_resume(struct device *dev) > static int omap_hsmmc_runtime_suspend(struct device *dev) > { > struct omap_hsmmc_host *host; > + unsigned long flags; > + int ret = 0; > > host = platform_get_drvdata(to_platform_device(dev)); > omap_hsmmc_context_save(host); > dev_dbg(dev, "disabled\n"); > > - return 0; > + if (host->flags & HSMMC_SWAKEUP_QUIRK) { > + OMAP_HSMMC_WRITE(host->base, ISE, 0); > + OMAP_HSMMC_WRITE(host->base, IE, 0); > + OMAP_HSMMC_WRITE(host->base, STAT, STAT_CLEAR); > + > + ret = pinctrl_select_state(host->pinctrl, host->idle); > + if (ret < 0) > + dev_warn(mmc_dev(host->mmc), "Unable to select idle pinmux\n"); > + > + spin_lock_irqsave(&host->irq_lock, flags); > + if (host->flags & HSMMC_SDIO_IRQ_ENABLED) { > + enable_irq(mmc_slot(host).sdio_irq); > + host->flags |= HSMMC_CIRQ_GPIO_ENABLED; > + } > + spin_unlock_irqrestore(&host->irq_lock, flags); > + } > + > + return ret; > } > > static int omap_hsmmc_runtime_resume(struct device *dev) > { > struct omap_hsmmc_host *host; > + unsigned long flags; > + int ret = 0; > > host = platform_get_drvdata(to_platform_device(dev)); > omap_hsmmc_context_restore(host); > dev_dbg(dev, "enabled\n"); > > - return 0; > + if (host->flags & HSMMC_SWAKEUP_QUIRK) { > + > + spin_lock_irqsave(&host->irq_lock, flags); > + if (host->flags & HSMMC_CIRQ_GPIO_ENABLED) { > + disable_irq_nosync(mmc_slot(host).sdio_irq); > + host->flags &= ~HSMMC_CIRQ_GPIO_ENABLED; > + } > + spin_unlock_irqrestore(&host->irq_lock, flags); > + > + ret = pinctrl_select_state(host->pinctrl, host->active); > + if (ret < 0) > + dev_warn(mmc_dev(host->mmc), "Unable to select active pinmux\n"); > + > + OMAP_HSMMC_WRITE(host->base, STAT, STAT_CLEAR); > + OMAP_HSMMC_WRITE(host->base, ISE, CIRQ_EN); > + OMAP_HSMMC_WRITE(host->base, IE, CIRQ_EN); > + } > + return ret; > } > > static struct dev_pm_ops omap_hsmmc_dev_pm_ops = { > diff --git a/include/linux/platform_data/mmc-omap.h b/include/linux/platform_data/mmc-omap.h > index 2bf1b30..fd5fff5 100644 > --- a/include/linux/platform_data/mmc-omap.h > +++ b/include/linux/platform_data/mmc-omap.h > @@ -115,6 +115,7 @@ struct omap_mmc_platform_data { > > int switch_pin; /* gpio (card detect) */ > int gpio_wp; /* gpio (write protect) */ > + int gpio_cirq; /* gpio (card irq) */ > > int (*set_bus_mode)(struct device *dev, int slot, int bus_mode); > int (*set_power)(struct device *dev, int slot, > @@ -145,6 +146,9 @@ struct omap_mmc_platform_data { > int card_detect_irq; > int (*card_detect)(struct device *dev, int slot); > > + /* SDIO IRQs */ > + int sdio_irq; > + > unsigned int ban_openended:1; > > } slots[OMAP_MMC_MAX_SLOTS]; > -- > 1.7.10.4 > > -- > To unsubscribe from this list: send the line "unsubscribe linux-mmc" in > the body of a message to majordomo@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html -- To unsubscribe from this list: send the line "unsubscribe linux-mmc" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
Hi Ulf, 2013/11/19 Ulf Hansson <ulf.hansson@linaro.org>: > On 18 November 2013 08:53, Andreas Fenkart <afenkart@gmail.com> wrote: >> >> +static irqreturn_t omap_hsmmc_cirq(int irq, void *dev_id) >> +{ >> + struct omap_hsmmc_host *host = dev_id; >> + unsigned long flags; >> + >> + spin_lock_irqsave(&host->irq_lock, flags); >> + if (host->flags & HSMMC_CIRQ_GPIO_ENABLED) { >> + disable_irq_nosync(mmc_slot(host).sdio_irq); >> + host->flags &= ~HSMMC_CIRQ_GPIO_ENABLED; >> + } >> + spin_unlock_irqrestore(&host->irq_lock, flags); >> + >> + pm_request_resume(host->dev); /* no use counter */ > > In the case were you are not waking up from system suspend, but from > runtime suspend, you likely want to signal the SDIO irq as soon as > possible. Then you should use mmc_signal_sdio_irq instead. That was my intention first as well, and previous patches worked that way. SDIO IRQ while in pm_suspend is a rare event, compard to SDIO irq while in pm_active state. cat /proc/interrupts CPU0 80: 68349 INTC 64 mmc0 236: 4352 GPIO 28 mmc0 Here the Wifi module is just connected, not being pinged or iperf running. So the benefit will not be as big as you imagine. On the other side the optimisations is not without problems, while in pm_suspend the functional clock is off and you must not access the registers of the module. But this is exactly whapt happens when you call mmc_signal_sdio_irq, it will call back into the drivers omap_hsmmc_enable_sdio_irq trying to disable the SDIO irq. So you must add special state machines there. After all it's doable but error prone, and I consider not worth the troubles for no noticeable speedup. Also have a look here, Balaji T K had a similar remark to yours http://www.spinics.net/lists/linux-omap/msg99832.html > > In the other case, when waking up from system suspend, you should be > able to completely rely on that the mmc_sdio_resume from the core > layer, will handle the IRQ. > > Kind regards > Ulf Hansson > -- To unsubscribe from this list: send the line "unsubscribe linux-mmc" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
On 19 November 2013 14:37, Andreas Fenkart <afenkart@gmail.com> wrote: > Hi Ulf, > > 2013/11/19 Ulf Hansson <ulf.hansson@linaro.org>: >> On 18 November 2013 08:53, Andreas Fenkart <afenkart@gmail.com> wrote: > >>> >>> +static irqreturn_t omap_hsmmc_cirq(int irq, void *dev_id) >>> +{ >>> + struct omap_hsmmc_host *host = dev_id; >>> + unsigned long flags; >>> + >>> + spin_lock_irqsave(&host->irq_lock, flags); >>> + if (host->flags & HSMMC_CIRQ_GPIO_ENABLED) { >>> + disable_irq_nosync(mmc_slot(host).sdio_irq); >>> + host->flags &= ~HSMMC_CIRQ_GPIO_ENABLED; >>> + } >>> + spin_unlock_irqrestore(&host->irq_lock, flags); >>> + >>> + pm_request_resume(host->dev); /* no use counter */ >> >> In the case were you are not waking up from system suspend, but from >> runtime suspend, you likely want to signal the SDIO irq as soon as >> possible. Then you should use mmc_signal_sdio_irq instead. > > That was my intention first as well, and previous patches worked that way. > SDIO IRQ while in pm_suspend is a rare event, compard to SDIO irq > while in pm_active state. > > cat /proc/interrupts > CPU0 > 80: 68349 INTC 64 mmc0 > 236: 4352 GPIO 28 mmc0 > > Here the Wifi module is just connected, not being pinged or iperf > running. So the benefit will not be as big as you imagine. You are right. > > On the other side the optimisations is not without problems, while in > pm_suspend the functional clock is off and you must not access the > registers of the module. > > But this is exactly whapt happens when you call mmc_signal_sdio_irq, > it will call back into the drivers omap_hsmmc_enable_sdio_irq trying to > disable the SDIO irq. So you must add special state machines there. Yes, it will be somewhat complicated - I guess. > > After all it's doable but error prone, and I consider not worth the troubles > for no noticeable speedup. > > Also have a look here, Balaji T K had a similar remark to yours > http://www.spinics.net/lists/linux-omap/msg99832.html Thanks, I should have looked that first. :-) Kind regards Ulf Hansson > >> >> In the other case, when waking up from system suspend, you should be >> able to completely rely on that the mmc_sdio_resume from the core >> layer, will handle the IRQ. >> >> Kind regards >> Ulf Hansson >> -- To unsubscribe from this list: send the line "unsubscribe linux-mmc" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
* Balaji T K <balajitk@ti.com> [131118 08:23]: > On Monday 18 November 2013 05:45 PM, Andreas Fenkart wrote: > >2013/11/18 Michael Trimarchi <michael@amarulasolutions.com>: > >>On Mon, Nov 18, 2013 at 8:53 AM, Andreas Fenkart <afenkart@gmail.com> wrote: > >>> static int omap_hsmmc_card_detect(struct device *dev, int slot) > >>> { > >>> struct omap_hsmmc_host *host = dev_get_drvdata(dev); > >>>@@ -452,10 +474,25 @@ static int omap_hsmmc_gpio_init(struct omap_mmc_platform_data *pdata) > >>> } else > >>> pdata->slots[0].gpio_wp = -EINVAL; > >>> > >>>+ if (gpio_is_valid(pdata->slots[0].gpio_cirq)) { > >>>+ pdata->slots[0].sdio_irq = > >>>+ gpio_to_irq(pdata->slots[0].gpio_cirq); > >> > >>What is this? re-assign the platform data? > > > >Seems like, I didn't pay attention to this. > >Simply kept in line how the write protection/read only pins are managed. > >I'd rather not change this part, or not changing it as part of adding > >sdio IRQ support it. > > > >Maybe somebody else on the list can explain why the platform data > >contains elements > >that are modified during runtime. > > > >- set_power / get_ro function callbacks > >- ocr_mask. > > > Hi, > > few params were passed via platform data in non-DT case and never cached > in internal data structure, with non-dt support going away soon, I am > planning to cleanup pdata usage in the driver when it gets to DT only support. The issue of pdata tinkering needs to be fixed first as it will cause nasty issues when the module is reprobed. Note that it's still possible to pass platform data in the device tree case as auxdata. And we probably need to do that for the pbias register handling until we have a driver for that. Talking of the pbias driver, any news on it? To recap, we basically we need a minimal separate driver that exposes the control module pbias register as a regulator to the hsmmc driver. I don't see that we can remove the platform data from the driver before that's done. Regards, Tony -- To unsubscribe from this list: send the line "unsubscribe linux-mmc" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
On Tuesday 19 November 2013 09:19 PM, Tony Lindgren wrote: > * Balaji T K <balajitk@ti.com> [131118 08:23]: >> On Monday 18 November 2013 05:45 PM, Andreas Fenkart wrote: >>> 2013/11/18 Michael Trimarchi <michael@amarulasolutions.com>: >>>> On Mon, Nov 18, 2013 at 8:53 AM, Andreas Fenkart <afenkart@gmail.com> wrote: >>>>> static int omap_hsmmc_card_detect(struct device *dev, int slot) >>>>> { >>>>> struct omap_hsmmc_host *host = dev_get_drvdata(dev); >>>>> @@ -452,10 +474,25 @@ static int omap_hsmmc_gpio_init(struct omap_mmc_platform_data *pdata) >>>>> } else >>>>> pdata->slots[0].gpio_wp = -EINVAL; >>>>> >>>>> + if (gpio_is_valid(pdata->slots[0].gpio_cirq)) { >>>>> + pdata->slots[0].sdio_irq = >>>>> + gpio_to_irq(pdata->slots[0].gpio_cirq); >>>> >>>> What is this? re-assign the platform data? >>> >>> Seems like, I didn't pay attention to this. >>> Simply kept in line how the write protection/read only pins are managed. >>> I'd rather not change this part, or not changing it as part of adding >>> sdio IRQ support it. >>> >>> Maybe somebody else on the list can explain why the platform data >>> contains elements >>> that are modified during runtime. >>> >>> - set_power / get_ro function callbacks >>> - ocr_mask. >>> >> Hi, >> >> few params were passed via platform data in non-DT case and never cached >> in internal data structure, with non-dt support going away soon, I am >> planning to cleanup pdata usage in the driver when it gets to DT only support. > > The issue of pdata tinkering needs to be fixed first as it will cause nasty > issues when the module is reprobed. Agree that pdata usage needs to be fixed, but currently module reprobe is working fine. > > Note that it's still possible to pass platform data in the device tree case > as auxdata. And we probably need to do that for the pbias register handling > until we have a driver for that. > > Talking of the pbias driver, any news on it? Almost there, will post the patches soon. Do you have a branch with updated board files, for me to base pbias patches on else I can base the patches on rc1 too. > > To recap, we basically we need a minimal separate driver that exposes the > control module pbias register as a regulator to the hsmmc driver. I don't see > that we can remove the platform data from the driver before that's done. > > Regards, > > Tony > -- To unsubscribe from this list: send the line "unsubscribe linux-mmc" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
* Balaji T K <balajitk@ti.com> [131119 08:00]: > On Tuesday 19 November 2013 09:19 PM, Tony Lindgren wrote: > >* Balaji T K <balajitk@ti.com> [131118 08:23]: > >> > >>few params were passed via platform data in non-DT case and never cached > >>in internal data structure, with non-dt support going away soon, I am > >>planning to cleanup pdata usage in the driver when it gets to DT only support. > > > >The issue of pdata tinkering needs to be fixed first as it will cause nasty > >issues when the module is reprobed. > > Agree that pdata usage needs to be fixed, but currently module > reprobe is working fine. OK. The sdio_irq should be just set in struct omap_hsmmc_host instead. > >Note that it's still possible to pass platform data in the device tree case > >as auxdata. And we probably need to do that for the pbias register handling > >until we have a driver for that. > > > >Talking of the pbias driver, any news on it? > > Almost there, will post the patches soon. > Do you have a branch with updated board files, for me to base pbias patches on > else I can base the patches on rc1 too. Great. How about make the pbias driver DT only? Let's not touch the board-*.c files any longer as those will be going away for v3.14. We can probably keep the old callback support in place also, and then remove it for v3.15. And after that it would certainly make sense to rip out the platform data fomr hsmmc driver just to get rid of the legacy support for multiplexing slots that's not needed in this driver. That would allow replacing all mmc->slots[0] accesses with something more standard. Regards, Tony -- To unsubscribe from this list: send the line "unsubscribe linux-mmc" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
2013/11/19 Tony Lindgren <tony@atomide.com>: > * Balaji T K <balajitk@ti.com> [131119 08:00]: >> On Tuesday 19 November 2013 09:19 PM, Tony Lindgren wrote: >> >* Balaji T K <balajitk@ti.com> [131118 08:23]: >> >> >> >>few params were passed via platform data in non-DT case and never cached >> >>in internal data structure, with non-dt support going away soon, I am >> >>planning to cleanup pdata usage in the driver when it gets to DT only support. >> > >> >The issue of pdata tinkering needs to be fixed first as it will cause nasty >> >issues when the module is reprobed. >> >> Agree that pdata usage needs to be fixed, but currently module >> reprobe is working fine. > > OK. The sdio_irq should be just set in struct omap_hsmmc_host instead. > >> >Note that it's still possible to pass platform data in the device tree case >> >as auxdata. And we probably need to do that for the pbias register handling >> >until we have a driver for that. >> > >> >Talking of the pbias driver, any news on it? >> >> Almost there, will post the patches soon. >> Do you have a branch with updated board files, for me to base pbias patches on >> else I can base the patches on rc1 too. > > Great. How about make the pbias driver DT only? Let's not touch the board-*.c > files any longer as those will be going away for v3.14. We can probably keep > the old callback support in place also, and then remove it for v3.15. Is there a dependency on the patches from Balaji or can the SDIO IRQ patches go in already? > > And after that it would certainly make sense to rip out the platform data > fomr hsmmc driver just to get rid of the legacy support for multiplexing slots > that's not needed in this driver. That would allow replacing all mmc->slots[0] > accesses with something more standard. > rgds, Andi -- To unsubscribe from this list: send the line "unsubscribe linux-mmc" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
On Thursday 21 November 2013 05:07 PM, Andreas Fenkart wrote: > 2013/11/19 Tony Lindgren <tony@atomide.com>: >> * Balaji T K <balajitk@ti.com> [131119 08:00]: >>> On Tuesday 19 November 2013 09:19 PM, Tony Lindgren wrote: >>>> * Balaji T K <balajitk@ti.com> [131118 08:23]: >>>>> >>>>> few params were passed via platform data in non-DT case and never cached >>>>> in internal data structure, with non-dt support going away soon, I am >>>>> planning to cleanup pdata usage in the driver when it gets to DT only support. >>>> >>>> The issue of pdata tinkering needs to be fixed first as it will cause nasty >>>> issues when the module is reprobed. >>> >>> Agree that pdata usage needs to be fixed, but currently module >>> reprobe is working fine. >> >> OK. The sdio_irq should be just set in struct omap_hsmmc_host instead. agree, sdio_irq should be cached in struct omap_hsmmc_host >> >>>> Note that it's still possible to pass platform data in the device tree case >>>> as auxdata. And we probably need to do that for the pbias register handling >>>> until we have a driver for that. >>>> >>>> Talking of the pbias driver, any news on it? >>> >>> Almost there, will post the patches soon. >>> Do you have a branch with updated board files, for me to base pbias patches on >>> else I can base the patches on rc1 too. >> >> Great. How about make the pbias driver DT only? Let's not touch the board-*.c >> files any longer as those will be going away for v3.14. We can probably keep >> the old callback support in place also, and then remove it for v3.15. > > Is there a dependency on the patches from Balaji or can the SDIO IRQ patches > go in already? > Hi Andreas, I could get sdio interrupt working on AM335x, will do more testing and get back to you. Pbias shouldn't have create any dependency. Just add sdio_irq to struct omap_hsmmc_host as suggested by Tony. Thanks and Regards, Balaji T K >> >> And after that it would certainly make sense to rip out the platform data >> fomr hsmmc driver just to get rid of the legacy support for multiplexing slots >> that's not needed in this driver. That would allow replacing all mmc->slots[0] >> accesses with something more standard. >> > > > rgds, > Andi > -- To unsubscribe from this list: send the line "unsubscribe linux-mmc" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
Hi, 2013-11-19 16:59 GMT+01:00 Balaji T K <balajitk@ti.com>: > On Tuesday 19 November 2013 09:19 PM, Tony Lindgren wrote: >> >> * Balaji T K <balajitk@ti.com> [131118 08:23]: >>> >>> On Monday 18 November 2013 05:45 PM, Andreas Fenkart wrote: >>>> >>>> 2013/11/18 Michael Trimarchi <michael@amarulasolutions.com>: >>>>> >>>>> On Mon, Nov 18, 2013 at 8:53 AM, Andreas Fenkart <afenkart@gmail.com> >>>>> wrote: >>>>>> >>>>>> static int omap_hsmmc_card_detect(struct device *dev, int slot) >>>>>> { >>>>>> struct omap_hsmmc_host *host = dev_get_drvdata(dev); >>>>>> @@ -452,10 +474,25 @@ static int omap_hsmmc_gpio_init(struct >>>>>> omap_mmc_platform_data *pdata) >>>>>> } else >>>>>> pdata->slots[0].gpio_wp = -EINVAL; >>>>>> >>>>>> + if (gpio_is_valid(pdata->slots[0].gpio_cirq)) { >>>>>> + pdata->slots[0].sdio_irq = >>>>>> + >>>>>> gpio_to_irq(pdata->slots[0].gpio_cirq); >>>>> >>>>> >>>>> What is this? re-assign the platform data? >>>> >>>> >>>> Seems like, I didn't pay attention to this. >>>> Simply kept in line how the write protection/read only pins are managed. >>>> I'd rather not change this part, or not changing it as part of adding >>>> sdio IRQ support it. >>>> >>>> Maybe somebody else on the list can explain why the platform data >>>> contains elements >>>> that are modified during runtime. >>>> >>>> - set_power / get_ro function callbacks >>>> - ocr_mask. >>>> >>> Hi, >>> >>> few params were passed via platform data in non-DT case and never cached >>> in internal data structure, with non-dt support going away soon, I am >>> planning to cleanup pdata usage in the driver when it gets to DT only >>> support. >> any news on this? I'd like to reuse generic mmc_of_parse, kind of difficult with the current driver state -- To unsubscribe from this list: send the line "unsubscribe linux-mmc" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
diff --git a/Documentation/devicetree/bindings/mmc/ti-omap-hsmmc.txt b/Documentation/devicetree/bindings/mmc/ti-omap-hsmmc.txt index 1136e6b..146f3ad 100644 --- a/Documentation/devicetree/bindings/mmc/ti-omap-hsmmc.txt +++ b/Documentation/devicetree/bindings/mmc/ti-omap-hsmmc.txt @@ -21,8 +21,11 @@ ti,non-removable: non-removable slot (like eMMC) ti,needs-special-reset: Requires a special softreset sequence ti,needs-special-hs-handling: HSMMC IP needs special setting for handling High Speed ti,quirk-swakup-missing: SOC missing the swakeup line, will not detect -SDIO irq while in suspend. Fallback to polling. Affected chips are -am335x, +SDIO irq while in suspend. The workaround is to reconfigure the dat1 line as a +GPIO upon suspend. Beyond this option and the GPIO config, you also need to set +named pinctrl states "default", "active" and "idle ", see example below. The +MMC driver will then then toggle between default and idle during the runtime +Affected chips are am335x, ------ | PRCM | @@ -49,3 +52,24 @@ Example: vmmc-supply = <&vmmc>; /* phandle to regulator node */ ti,non-removable; }; + +[am335x with with gpio for sdio irq] + + mmc1_cirq_pin: pinmux_cirq_pin { + pinctrl-single,pins = < + 0x0f8 0x3f /* MMC0_DAT1 as GPIO2_28 */ + >; + }; + + mmc1: mmc@48060000 { + ti,non-removable; + bus-width = <4>; + vmmc-supply = <&ldo2_reg>; + vmmc_aux-supply = <&vmmc>; + ti,quirk-swakeup-missing; + pinctrl-names = "default", "active", "idle"; + pinctrl-0 = <&mmc1_pins>; + pinctrl-1 = <&mmc1_pins>; + pinctrl-2 = <&mmc1_cirq_pin>; + ti,cirq-gpio = <&gpio3 28 0>; + }; diff --git a/drivers/mmc/host/omap_hsmmc.c b/drivers/mmc/host/omap_hsmmc.c index 6b0ec55..b94ab08 100644 --- a/drivers/mmc/host/omap_hsmmc.c +++ b/drivers/mmc/host/omap_hsmmc.c @@ -36,6 +36,7 @@ #include <linux/mmc/core.h> #include <linux/mmc/mmc.h> #include <linux/io.h> +#include <linux/irq.h> #include <linux/gpio.h> #include <linux/regulator/consumer.h> #include <linux/pinctrl/consumer.h> @@ -213,11 +214,32 @@ struct omap_hsmmc_host { int req_in_progress; int flags; #define HSMMC_SDIO_IRQ_ENABLED (1 << 0) /* SDIO irq enabled */ +#define HSMMC_SWAKEUP_QUIRK (1 << 1) +#define HSMMC_CIRQ_GPIO_ENABLED (1 << 2) struct omap_hsmmc_next next_data; + struct pinctrl *pinctrl; + struct pinctrl_state *fixed, *active, *idle; struct omap_mmc_platform_data *pdata; }; +static irqreturn_t omap_hsmmc_cirq(int irq, void *dev_id) +{ + struct omap_hsmmc_host *host = dev_id; + unsigned long flags; + + spin_lock_irqsave(&host->irq_lock, flags); + if (host->flags & HSMMC_CIRQ_GPIO_ENABLED) { + disable_irq_nosync(mmc_slot(host).sdio_irq); + host->flags &= ~HSMMC_CIRQ_GPIO_ENABLED; + } + spin_unlock_irqrestore(&host->irq_lock, flags); + + pm_request_resume(host->dev); /* no use counter */ + + return IRQ_HANDLED; +} + static int omap_hsmmc_card_detect(struct device *dev, int slot) { struct omap_hsmmc_host *host = dev_get_drvdata(dev); @@ -452,10 +474,25 @@ static int omap_hsmmc_gpio_init(struct omap_mmc_platform_data *pdata) } else pdata->slots[0].gpio_wp = -EINVAL; + if (gpio_is_valid(pdata->slots[0].gpio_cirq)) { + pdata->slots[0].sdio_irq = + gpio_to_irq(pdata->slots[0].gpio_cirq); + ret = gpio_request_one(pdata->slots[0].gpio_cirq, GPIOF_DIR_IN, + "sdio_cirq"); + if (ret) + goto err_free_ro; + + } else { + pdata->slots[0].gpio_cirq = -EINVAL; + } + + return 0; +err_free_ro: + if (gpio_is_valid(pdata->slots[0].gpio_wp)) err_free_wp: - gpio_free(pdata->slots[0].gpio_wp); + gpio_free(pdata->slots[0].gpio_wp); err_free_cd: if (gpio_is_valid(pdata->slots[0].switch_pin)) err_free_sp: @@ -469,6 +506,69 @@ static void omap_hsmmc_gpio_free(struct omap_mmc_platform_data *pdata) gpio_free(pdata->slots[0].gpio_wp); if (gpio_is_valid(pdata->slots[0].switch_pin)) gpio_free(pdata->slots[0].switch_pin); + if (gpio_is_valid(pdata->slots[0].gpio_cirq)) + gpio_free(pdata->slots[0].gpio_cirq); +} + +static int omap_hsmmc_pin_init(struct omap_hsmmc_host *host) +{ + int ret; + + host->pinctrl = devm_pinctrl_get(host->dev); + if (IS_ERR(host->pinctrl)) { + dev_dbg(host->dev, "no pinctrl handle\n"); + ret = 0; + goto out; + } + + host->fixed = pinctrl_lookup_state(host->pinctrl, + PINCTRL_STATE_DEFAULT); + if (IS_ERR(host->fixed)) { + dev_dbg(host->dev, + "pins are not configured from the driver\n"); + host->fixed = NULL; + ret = 0; + goto out; + } + + ret = pinctrl_select_state(host->pinctrl, host->fixed); + if (ret < 0) + goto err; + + /* For most cases we don't have wake-ups, and exit after this */ + host->active = pinctrl_lookup_state(host->pinctrl, "active"); + if (IS_ERR(host->active)) { + ret = PTR_ERR(host->active); + host->active = NULL; + return 0; + } + + host->idle = pinctrl_lookup_state(host->pinctrl, + PINCTRL_STATE_IDLE); + if (IS_ERR(host->idle)) { + ret = PTR_ERR(host->idle); + host->idle = NULL; + goto err; + } + + /* Let's make sure the active and idle states work */ + ret = pinctrl_select_state(host->pinctrl, host->idle); + if (ret < 0) + goto err; + + ret = pinctrl_select_state(host->pinctrl, host->active); + if (ret < 0) + goto err; + + dev_info(mmc_dev(host->mmc), "pins configured for wake-up events\n"); + + return 0; + +err: + dev_err(mmc_dev(host->mmc), "pins configuration error: %i\n", ret); + +out: + return ret; } /* @@ -1791,6 +1891,7 @@ static struct omap_mmc_platform_data *of_get_hsmmc_pdata(struct device *dev) pdata->nr_slots = 1; pdata->slots[0].switch_pin = cd_gpio; pdata->slots[0].gpio_wp = wp_gpio; + pdata->slots[0].gpio_cirq = of_get_named_gpio(np, "ti,cirq-gpio", 0); if (of_find_property(np, "ti,non-removable", NULL)) { pdata->slots[0].nonremovable = true; @@ -1837,7 +1938,6 @@ static int omap_hsmmc_probe(struct platform_device *pdev) const struct of_device_id *match; dma_cap_mask_t mask; unsigned tx_req, rx_req; - struct pinctrl *pinctrl; match = of_match_device(of_match_ptr(omap_mmc_of_match), &pdev->dev); if (match) { @@ -2068,10 +2168,22 @@ static int omap_hsmmc_probe(struct platform_device *pdev) omap_hsmmc_disable_irq(host); - pinctrl = devm_pinctrl_get_select_default(&pdev->dev); - if (IS_ERR(pinctrl)) - dev_warn(&pdev->dev, - "pins are not configured from the driver\n"); + ret = omap_hsmmc_pin_init(host); + if (ret) + goto err_pinctrl_state; + + if ((mmc_slot(host).sdio_irq)) { + /* prevent auto-enabling of IRQ */ + irq_set_status_flags(mmc_slot(host).sdio_irq, IRQ_NOAUTOEN); + ret = request_irq(mmc_slot(host).sdio_irq, omap_hsmmc_cirq, + IRQF_TRIGGER_LOW | IRQF_ONESHOT, + mmc_hostname(mmc), host); + if (ret) { + dev_dbg(mmc_dev(host->mmc), + "Unable to grab MMC SDIO IRQ\n"); + goto err_irq_sdio; + } + } /* * For now, only support SDIO interrupt if we are booted with @@ -2084,8 +2196,14 @@ static int omap_hsmmc_probe(struct platform_device *pdev) mmc->caps |= MMC_CAP_SDIO_IRQ; if (of_find_property(host->dev->of_node, "ti,quirk-swakeup-missing", NULL)) { - /* no wakeup from deeper power states, use polling */ - mmc->caps &= ~MMC_CAP_SDIO_IRQ; + /* use GPIO to wakeup from deeper power states */ + if (!host->idle || !mmc_slot(host).sdio_irq) { + dev_err(mmc_dev(host->mmc), + "Missing GPIO config or pinctrl idle state\n"); + goto err_irq_sdio; + } + + host->flags |= HSMMC_SWAKEUP_QUIRK; } } @@ -2113,7 +2231,13 @@ static int omap_hsmmc_probe(struct platform_device *pdev) err_slot_name: mmc_remove_host(mmc); - free_irq(mmc_slot(host).card_detect_irq, host); +err_irq_sdio: + if ((mmc_slot(host).sdio_irq)) + free_irq(mmc_slot(host).sdio_irq, host); +err_pinctrl_state: + devm_pinctrl_put(host->pinctrl); + if ((mmc_slot(host).card_detect_irq)) + free_irq(mmc_slot(host).card_detect_irq, host); err_irq_cd: if (host->use_reg) omap_hsmmc_reg_put(host); @@ -2158,13 +2282,15 @@ static int omap_hsmmc_remove(struct platform_device *pdev) if (host->pdata->cleanup) host->pdata->cleanup(&pdev->dev); free_irq(host->irq, host); + if ((mmc_slot(host).sdio_irq)) + free_irq(mmc_slot(host).sdio_irq, host); if (mmc_slot(host).card_detect_irq) free_irq(mmc_slot(host).card_detect_irq, host); - if (host->tx_chan) dma_release_channel(host->tx_chan); if (host->rx_chan) dma_release_channel(host->rx_chan); + devm_pinctrl_put(host->pinctrl); pm_runtime_put_sync(host->dev); pm_runtime_disable(host->dev); @@ -2231,6 +2357,9 @@ static int omap_hsmmc_suspend(struct device *dev) OMAP_HSMMC_READ(host->base, HCTL) & ~SDBP); } + if (host->flags & HSMMC_SWAKEUP_QUIRK) + disable_irq(mmc_slot(host).sdio_irq); + if (host->dbclk) clk_disable_unprepare(host->dbclk); @@ -2268,6 +2397,9 @@ static int omap_hsmmc_resume(struct device *dev) if (ret == 0) host->suspended = 0; + if (host->flags & HSMMC_SWAKEUP_QUIRK) + enable_irq(mmc_slot(host).sdio_irq); + pm_runtime_mark_last_busy(host->dev); pm_runtime_put_autosuspend(host->dev); @@ -2285,23 +2417,61 @@ static int omap_hsmmc_resume(struct device *dev) static int omap_hsmmc_runtime_suspend(struct device *dev) { struct omap_hsmmc_host *host; + unsigned long flags; + int ret = 0; host = platform_get_drvdata(to_platform_device(dev)); omap_hsmmc_context_save(host); dev_dbg(dev, "disabled\n"); - return 0; + if (host->flags & HSMMC_SWAKEUP_QUIRK) { + OMAP_HSMMC_WRITE(host->base, ISE, 0); + OMAP_HSMMC_WRITE(host->base, IE, 0); + OMAP_HSMMC_WRITE(host->base, STAT, STAT_CLEAR); + + ret = pinctrl_select_state(host->pinctrl, host->idle); + if (ret < 0) + dev_warn(mmc_dev(host->mmc), "Unable to select idle pinmux\n"); + + spin_lock_irqsave(&host->irq_lock, flags); + if (host->flags & HSMMC_SDIO_IRQ_ENABLED) { + enable_irq(mmc_slot(host).sdio_irq); + host->flags |= HSMMC_CIRQ_GPIO_ENABLED; + } + spin_unlock_irqrestore(&host->irq_lock, flags); + } + + return ret; } static int omap_hsmmc_runtime_resume(struct device *dev) { struct omap_hsmmc_host *host; + unsigned long flags; + int ret = 0; host = platform_get_drvdata(to_platform_device(dev)); omap_hsmmc_context_restore(host); dev_dbg(dev, "enabled\n"); - return 0; + if (host->flags & HSMMC_SWAKEUP_QUIRK) { + + spin_lock_irqsave(&host->irq_lock, flags); + if (host->flags & HSMMC_CIRQ_GPIO_ENABLED) { + disable_irq_nosync(mmc_slot(host).sdio_irq); + host->flags &= ~HSMMC_CIRQ_GPIO_ENABLED; + } + spin_unlock_irqrestore(&host->irq_lock, flags); + + ret = pinctrl_select_state(host->pinctrl, host->active); + if (ret < 0) + dev_warn(mmc_dev(host->mmc), "Unable to select active pinmux\n"); + + OMAP_HSMMC_WRITE(host->base, STAT, STAT_CLEAR); + OMAP_HSMMC_WRITE(host->base, ISE, CIRQ_EN); + OMAP_HSMMC_WRITE(host->base, IE, CIRQ_EN); + } + return ret; } static struct dev_pm_ops omap_hsmmc_dev_pm_ops = { diff --git a/include/linux/platform_data/mmc-omap.h b/include/linux/platform_data/mmc-omap.h index 2bf1b30..fd5fff5 100644 --- a/include/linux/platform_data/mmc-omap.h +++ b/include/linux/platform_data/mmc-omap.h @@ -115,6 +115,7 @@ struct omap_mmc_platform_data { int switch_pin; /* gpio (card detect) */ int gpio_wp; /* gpio (write protect) */ + int gpio_cirq; /* gpio (card irq) */ int (*set_bus_mode)(struct device *dev, int slot, int bus_mode); int (*set_power)(struct device *dev, int slot, @@ -145,6 +146,9 @@ struct omap_mmc_platform_data { int card_detect_irq; int (*card_detect)(struct device *dev, int slot); + /* SDIO IRQs */ + int sdio_irq; + unsigned int ban_openended:1; } slots[OMAP_MMC_MAX_SLOTS];
The am335x can't detect pending cirq in PM runtime suspend. This patch reconfigures dat1 as a GPIO before going to suspend. SDIO interrupts are detected with the GPIO, the GPIO will only wake the module from suspend, SDIO irq detection will still happen through the IP block. Idea of remuxing the pins by Tony Lindgren as well as the implementation of omap_hsmmc_pin_init. Signed-off-by: Andreas Fenkart <afenkart@gmail.com>