diff options
Diffstat (limited to 'drivers/usb/otg/ab8500-usb.c')
| -rw-r--r-- | drivers/usb/otg/ab8500-usb.c | 110 |
1 files changed, 39 insertions, 71 deletions
diff --git a/drivers/usb/otg/ab8500-usb.c b/drivers/usb/otg/ab8500-usb.c index 19446ba114d..cd4b81b259f 100644 --- a/drivers/usb/otg/ab8500-usb.c +++ b/drivers/usb/otg/ab8500-usb.c @@ -37,7 +37,7 @@ #include <linux/mfd/dbx500-prcmu.h> #include <mach/usb.h> #include <linux/kernel_stat.h> - +#include <linux/pm_qos_params.h> #include <linux/wakelock.h> static struct wake_lock ab8500_musb_wakelock; @@ -71,6 +71,8 @@ static struct wake_lock ab8500_musb_wakelock; #define AB8500_USB_PHY_TUNE2 0x06 #define AB8500_USB_PHY_TUNE3 0x07 +static struct pm_qos_request_list usb_pm_qos_latency; +static bool usb_pm_qos_is_latency_0; #define USB_PROBE_DELAY 1000 /* 1 seconds */ #define USB_LIMIT (200) /* If we have more than 200 irqs per second */ @@ -170,13 +172,27 @@ static void ab8500_usb_load(struct work_struct *work) num_irqs += kstat_irqs_cpu(IRQ_DB8500_USBOTG, cpu); if ((num_irqs > old_num_irqs) && - (num_irqs - old_num_irqs) > USB_LIMIT) - prcmu_qos_update_requirement(PRCMU_QOS_ARM_OPP, + (num_irqs - old_num_irqs) > USB_LIMIT) { + + prcmu_qos_update_requirement(PRCMU_QOS_ARM_OPP, "usb", 125); - else - prcmu_qos_update_requirement(PRCMU_QOS_ARM_OPP, - "usb", 25); + if (!usb_pm_qos_is_latency_0) { + + pm_qos_add_request(&usb_pm_qos_latency, + PM_QOS_CPU_DMA_LATENCY, 0); + usb_pm_qos_is_latency_0 = true; + } + } else { + + if (usb_pm_qos_is_latency_0) { + + pm_qos_remove_request(&usb_pm_qos_latency); + usb_pm_qos_is_latency_0 = false; + } + prcmu_qos_update_requirement(PRCMU_QOS_ARM_OPP, + "usb", 25); + } old_num_irqs = num_irqs; schedule_delayed_work_on(0, @@ -221,6 +237,7 @@ static void ab8500_usb_regulator_ctrl(struct ab8500_usb *ab, bool sel_host, } } + static void ab8500_usb_phy_enable(struct ab8500_usb *ab, bool sel_host) { u8 bit; @@ -235,11 +252,10 @@ static void ab8500_usb_phy_enable(struct ab8500_usb *ab, bool sel_host) prcmu_qos_update_requirement(PRCMU_QOS_APE_OPP, (char *)dev_name(ab->dev), 100); - if (!sel_host) { - schedule_delayed_work_on(0, + + schedule_delayed_work_on(0, &ab->work_usb_workaround, msecs_to_jiffies(USB_PROBE_DELAY)); - } abx500_mask_and_set_register_interruptible(ab->dev, AB8500_USB, @@ -399,10 +415,17 @@ static void ab8500_usb_delayed_work(struct work_struct *work) static irqreturn_t ab8500_usb_disconnect_irq(int irq, void *data) { struct ab8500_usb *ab = (struct ab8500_usb *) data; + enum usb_xceiv_events event; /* Link status will not be updated till phy is disabled. */ - if (ab->mode == USB_HOST) + if (ab->mode == USB_HOST) { + event = USB_EVENT_NONE; + ab->otg.default_a = false; + ab->vbus_draw = 0; + atomic_notifier_call_chain(&ab->otg.notifier, + event, &ab->vbus_draw); ab8500_usb_host_phy_dis(ab); + } else if (ab->mode == USB_PERIPHERAL) ab8500_usb_peri_phy_dis(ab); else if (ab->mode == USB_DEDICATED_CHG && ab->rev == 0x20) { @@ -486,23 +509,13 @@ static int ab8500_usb_set_peripheral(struct otg_transceiver *otg, ab = xceiv_to_ab(otg); + ab->otg.gadget = gadget; /* Some drivers call this function in atomic context. * Do not update ab8500 registers directly till this * is fixed. */ - - if (!gadget) { - ab->otg.gadget = NULL; + if (!gadget) schedule_work(&ab->phy_dis_work); - } else { - ab->otg.gadget = gadget; - - /* Phy will not be enabled if cable is already - * plugged-in. Schedule to enable phy. - * Use same delay to avoid any race condition. - */ - schedule_delayed_work(&ab->dwork, ab->link_status_wait); - } return 0; } @@ -517,22 +530,14 @@ static int ab8500_usb_set_host(struct otg_transceiver *otg, ab = xceiv_to_ab(otg); + ab->otg.host = host; + /* Some drivers call this function in atomic context. * Do not update ab8500 registers directly till this * is fixed. */ - - if (!host) { - ab->otg.host = NULL; + if (!host) schedule_work(&ab->phy_dis_work); - } else { - ab->otg.host = host; - /* Phy will not be enabled if cable is already - * plugged-in. Schedule to enable phy. - * Use same delay to avoid any race condition. - */ - schedule_delayed_work(&ab->dwork, ab->link_status_wait); - } return 0; } @@ -544,11 +549,6 @@ static int ab8500_usb_set_host(struct otg_transceiver *otg, */ static int ab8500_usb_boot_detect(struct ab8500_usb *ab) { - int err; - struct device *device = ab->dev; - u8 usb_status = 0; - u8 val = 0; - /* Disabling PHY before selective enable or disable */ abx500_mask_and_set_register_interruptible(ab->dev, AB8500_USB, @@ -578,39 +578,7 @@ static int ab8500_usb_boot_detect(struct ab8500_usb *ab) AB8500_BIT_PHY_CTRL_HOST_EN, 0); - - err = abx500_get_register_interruptible(device, - AB8500_INTERRUPT, AB8500_IT_SOURCE20_REG, - &usb_status); - if (err < 0) { - dev_err(device, "Read IT 20 failed\n"); - return err; - } - - if (usb_status & AB8500_SRC_INT_USB_HOST) - ab8500_usb_host_phy_en(ab); - - - err = abx500_get_register_interruptible(device, - AB8500_INTERRUPT, AB8500_IT_SOURCE2_REG, - &usb_status); - if (err < 0) { - dev_err(device, "Read IT 2 failed\n"); - return err; - } - - if (usb_status & AB8500_SRC_INT_USB_DEVICE) { - /* Check if it is a dedicated charger */ - (void)abx500_get_register_interruptible(device, - AB8500_USB, AB8500_USB_LINE_STAT_REG, &val); - - val = (val >> 3) & 0x0F; - - if (val == USB_LINK_DEDICATED_CHG) - ab->mode = USB_DEDICATED_CHG; - else - ab8500_usb_peri_phy_en(ab); - } + ab8500_usb_link_status_update(ab); return 0; } |