diff options
Diffstat (limited to 'drivers/usb/musb')
| -rw-r--r-- | drivers/usb/musb/musb_core.c | 74 | ||||
| -rw-r--r-- | drivers/usb/musb/musb_gadget.c | 2 | ||||
| -rw-r--r-- | drivers/usb/musb/musb_host.c | 18 | ||||
| -rw-r--r-- | drivers/usb/musb/musb_host.h | 4 | ||||
| -rw-r--r-- | drivers/usb/musb/musb_trace.h | 17 | ||||
| -rw-r--r-- | drivers/usb/musb/omap2430.c | 73 |
6 files changed, 135 insertions, 53 deletions
diff --git a/drivers/usb/musb/musb_core.c b/drivers/usb/musb/musb_core.c index 8f09a387b773..f7b1d5993f8c 100644 --- a/drivers/usb/musb/musb_core.c +++ b/drivers/usb/musb/musb_core.c @@ -480,9 +480,7 @@ int musb_set_host(struct musb *musb) devctl = musb_read_devctl(musb); if (!(devctl & MUSB_DEVCTL_BDEVICE)) { - dev_info(musb->controller, - "%s: already in host mode: %02x\n", - __func__, devctl); + trace_musb_state(musb, devctl, "Already in host mode"); goto init_data; } @@ -499,6 +497,9 @@ int musb_set_host(struct musb *musb) return error; } + devctl = musb_read_devctl(musb); + trace_musb_state(musb, devctl, "Host mode set"); + init_data: musb->is_active = 1; musb->xceiv->otg->state = OTG_STATE_A_IDLE; @@ -526,10 +527,7 @@ int musb_set_peripheral(struct musb *musb) devctl = musb_read_devctl(musb); if (devctl & MUSB_DEVCTL_BDEVICE) { - dev_info(musb->controller, - "%s: already in peripheral mode: %02x\n", - __func__, devctl); - + trace_musb_state(musb, devctl, "Already in peripheral mode"); goto init_data; } @@ -546,6 +544,9 @@ int musb_set_peripheral(struct musb *musb) return error; } + devctl = musb_read_devctl(musb); + trace_musb_state(musb, devctl, "Peripheral mode set"); + init_data: musb->is_active = 0; musb->xceiv->otg->state = OTG_STATE_B_IDLE; @@ -1984,6 +1985,21 @@ ATTRIBUTE_GROUPS(musb); #define MUSB_QUIRK_A_DISCONNECT_19 ((3 << MUSB_DEVCTL_VBUS_SHIFT) | \ MUSB_DEVCTL_SESSION) +static bool musb_state_needs_recheck(struct musb *musb, u8 devctl, + const char *desc) +{ + if (musb->quirk_retries && !musb->flush_irq_work) { + trace_musb_state(musb, devctl, desc); + schedule_delayed_work(&musb->irq_work, + msecs_to_jiffies(1000)); + musb->quirk_retries--; + + return true; + } + + return false; +} + /* * Check the musb devctl session bit to determine if we want to * allow PM runtime for the device. In general, we want to keep things @@ -2004,36 +2020,21 @@ static void musb_pm_runtime_check_session(struct musb *musb) MUSB_DEVCTL_HR; switch (devctl & ~s) { case MUSB_QUIRK_B_DISCONNECT_99: - if (musb->quirk_retries && !musb->flush_irq_work) { - musb_dbg(musb, "Poll devctl in case of suspend after disconnect\n"); - schedule_delayed_work(&musb->irq_work, - msecs_to_jiffies(1000)); - musb->quirk_retries--; - break; - } - fallthrough; + musb_state_needs_recheck(musb, devctl, + "Poll devctl in case of suspend after disconnect"); + break; case MUSB_QUIRK_B_INVALID_VBUS_91: - if (musb->quirk_retries && !musb->flush_irq_work) { - musb_dbg(musb, - "Poll devctl on invalid vbus, assume no session"); - schedule_delayed_work(&musb->irq_work, - msecs_to_jiffies(1000)); - musb->quirk_retries--; + if (musb_state_needs_recheck(musb, devctl, + "Poll devctl on invalid vbus, assume no session")) return; - } fallthrough; case MUSB_QUIRK_A_DISCONNECT_19: - if (musb->quirk_retries && !musb->flush_irq_work) { - musb_dbg(musb, - "Poll devctl on possible host mode disconnect"); - schedule_delayed_work(&musb->irq_work, - msecs_to_jiffies(1000)); - musb->quirk_retries--; + if (musb_state_needs_recheck(musb, devctl, + "Poll devctl on possible host mode disconnect")) return; - } if (!musb->session) break; - musb_dbg(musb, "Allow PM on possible host mode disconnect"); + trace_musb_state(musb, devctl, "Allow PM on possible host mode disconnect"); pm_runtime_mark_last_busy(musb->controller); pm_runtime_put_autosuspend(musb->controller); musb->session = false; @@ -2049,14 +2050,23 @@ static void musb_pm_runtime_check_session(struct musb *musb) /* Block PM or allow PM? */ if (s) { - musb_dbg(musb, "Block PM on active session: %02x", devctl); + trace_musb_state(musb, devctl, "Block PM on active session"); error = pm_runtime_get_sync(musb->controller); if (error < 0) dev_err(musb->controller, "Could not enable: %i\n", error); musb->quirk_retries = 3; + + /* + * We can get a spurious MUSB_INTR_SESSREQ interrupt on start-up + * in B-peripheral mode with nothing connected and the session + * bit clears silently. Check status again in 3 seconds. + */ + if (devctl & MUSB_DEVCTL_BDEVICE) + schedule_delayed_work(&musb->irq_work, + msecs_to_jiffies(3000)); } else { - musb_dbg(musb, "Allow PM with no session: %02x", devctl); + trace_musb_state(musb, devctl, "Allow PM with no session"); pm_runtime_mark_last_busy(musb->controller); pm_runtime_put_autosuspend(musb->controller); } diff --git a/drivers/usb/musb/musb_gadget.c b/drivers/usb/musb/musb_gadget.c index ef374d4dd94a..98c0f4c1bffd 100644 --- a/drivers/usb/musb/musb_gadget.c +++ b/drivers/usb/musb/musb_gadget.c @@ -611,7 +611,7 @@ static void rxstate(struct musb *musb, struct musb_request *req) * mode 0 only. So we do not get endpoint interrupts due to DMA * completion. We only get interrupts from DMA controller. * - * We could operate in DMA mode 1 if we knew the size of the tranfer + * We could operate in DMA mode 1 if we knew the size of the transfer * in advance. For mass storage class, request->length = what the host * sends, so that'd work. But for pretty much everything else, * request->length is routinely more than what the host sends. For diff --git a/drivers/usb/musb/musb_host.c b/drivers/usb/musb/musb_host.c index 30c5e7de0761..9ff7d891b4b7 100644 --- a/drivers/usb/musb/musb_host.c +++ b/drivers/usb/musb/musb_host.c @@ -563,10 +563,9 @@ musb_rx_reinit(struct musb *musb, struct musb_qh *qh, u8 epnum) ep->rx_reinit = 0; } -static void musb_tx_dma_set_mode_mentor(struct dma_controller *dma, - struct musb_hw_ep *hw_ep, struct musb_qh *qh, - struct urb *urb, u32 offset, - u32 *length, u8 *mode) +static void musb_tx_dma_set_mode_mentor(struct musb_hw_ep *hw_ep, + struct musb_qh *qh, + u32 *length, u8 *mode) { struct dma_channel *channel = hw_ep->tx_channel; void __iomem *epio = hw_ep->regs; @@ -602,12 +601,8 @@ static void musb_tx_dma_set_mode_mentor(struct dma_controller *dma, musb_writew(epio, MUSB_TXCSR, csr); } -static void musb_tx_dma_set_mode_cppi_tusb(struct dma_controller *dma, - struct musb_hw_ep *hw_ep, - struct musb_qh *qh, +static void musb_tx_dma_set_mode_cppi_tusb(struct musb_hw_ep *hw_ep, struct urb *urb, - u32 offset, - u32 *length, u8 *mode) { struct dma_channel *channel = hw_ep->tx_channel; @@ -630,11 +625,10 @@ static bool musb_tx_dma_program(struct dma_controller *dma, u8 mode; if (musb_dma_inventra(hw_ep->musb) || musb_dma_ux500(hw_ep->musb)) - musb_tx_dma_set_mode_mentor(dma, hw_ep, qh, urb, offset, + musb_tx_dma_set_mode_mentor(hw_ep, qh, &length, &mode); else if (is_cppi_enabled(hw_ep->musb) || tusb_dma_omap(hw_ep->musb)) - musb_tx_dma_set_mode_cppi_tusb(dma, hw_ep, qh, urb, offset, - &length, &mode); + musb_tx_dma_set_mode_cppi_tusb(hw_ep, urb, &mode); else return false; diff --git a/drivers/usb/musb/musb_host.h b/drivers/usb/musb/musb_host.h index 4804d4d85c15..63298bd233e0 100644 --- a/drivers/usb/musb/musb_host.h +++ b/drivers/usb/musb/musb_host.h @@ -61,10 +61,6 @@ extern void musb_host_tx(struct musb *, u8); extern void musb_host_rx(struct musb *, u8); extern void musb_root_disconnect(struct musb *musb); extern void musb_host_free(struct musb *); -extern void musb_host_cleanup(struct musb *); -extern void musb_host_tx(struct musb *, u8); -extern void musb_host_rx(struct musb *, u8); -extern void musb_root_disconnect(struct musb *musb); extern void musb_host_resume_root_hub(struct musb *musb); extern void musb_host_poke_root_hub(struct musb *musb); extern int musb_port_suspend(struct musb *musb, bool do_suspend); diff --git a/drivers/usb/musb/musb_trace.h b/drivers/usb/musb/musb_trace.h index 380ebc77eab1..ec28b5716796 100644 --- a/drivers/usb/musb/musb_trace.h +++ b/drivers/usb/musb/musb_trace.h @@ -37,6 +37,23 @@ TRACE_EVENT(musb_log, TP_printk("%s: %s", __get_str(name), __get_str(msg)) ); +TRACE_EVENT(musb_state, + TP_PROTO(struct musb *musb, u8 devctl, const char *desc), + TP_ARGS(musb, devctl, desc), + TP_STRUCT__entry( + __string(name, dev_name(musb->controller)) + __field(u8, devctl) + __string(desc, desc) + ), + TP_fast_assign( + __assign_str(name, dev_name(musb->controller)); + __entry->devctl = devctl; + __assign_str(desc, desc); + ), + TP_printk("%s: devctl: %02x %s", __get_str(name), __entry->devctl, + __get_str(desc)) +); + DECLARE_EVENT_CLASS(musb_regb, TP_PROTO(void *caller, const void __iomem *addr, unsigned int offset, u8 data), diff --git a/drivers/usb/musb/omap2430.c b/drivers/usb/musb/omap2430.c index 4232f1ce3fbf..f086960fe2b5 100644 --- a/drivers/usb/musb/omap2430.c +++ b/drivers/usb/musb/omap2430.c @@ -33,6 +33,9 @@ struct omap2430_glue { enum musb_vbus_id_status status; struct work_struct omap_musb_mailbox_work; struct device *control_otghs; + unsigned int is_runtime_suspended:1; + unsigned int needs_resume:1; + unsigned int phy_suspended:1; }; #define glue_to_musb(g) platform_get_drvdata(g->musb) @@ -456,8 +459,12 @@ static int omap2430_runtime_suspend(struct device *dev) omap2430_low_level_exit(musb); - phy_power_off(musb->phy); - phy_exit(musb->phy); + if (!glue->phy_suspended) { + phy_power_off(musb->phy); + phy_exit(musb->phy); + } + + glue->is_runtime_suspended = 1; return 0; } @@ -470,8 +477,10 @@ static int omap2430_runtime_resume(struct device *dev) if (!musb) return 0; - phy_init(musb->phy); - phy_power_on(musb->phy); + if (!glue->phy_suspended) { + phy_init(musb->phy); + phy_power_on(musb->phy); + } omap2430_low_level_init(musb); musb_writel(musb->mregs, OTG_INTERFSEL, @@ -480,12 +489,68 @@ static int omap2430_runtime_resume(struct device *dev) /* Wait for musb to get oriented. Otherwise we can get babble */ usleep_range(200000, 250000); + glue->is_runtime_suspended = 0; + + return 0; +} + +/* I2C and SPI PHYs need to be suspended before the glue layer */ +static int omap2430_suspend(struct device *dev) +{ + struct omap2430_glue *glue = dev_get_drvdata(dev); + struct musb *musb = glue_to_musb(glue); + + phy_power_off(musb->phy); + phy_exit(musb->phy); + glue->phy_suspended = 1; + + return 0; +} + +/* Glue layer needs to be suspended after musb_suspend() */ +static int omap2430_suspend_late(struct device *dev) +{ + struct omap2430_glue *glue = dev_get_drvdata(dev); + + if (glue->is_runtime_suspended) + return 0; + + glue->needs_resume = 1; + + return omap2430_runtime_suspend(dev); +} + +static int omap2430_resume_early(struct device *dev) +{ + struct omap2430_glue *glue = dev_get_drvdata(dev); + + if (!glue->needs_resume) + return 0; + + glue->needs_resume = 0; + + return omap2430_runtime_resume(dev); +} + +static int omap2430_resume(struct device *dev) +{ + struct omap2430_glue *glue = dev_get_drvdata(dev); + struct musb *musb = glue_to_musb(glue); + + phy_init(musb->phy); + phy_power_on(musb->phy); + glue->phy_suspended = 0; + return 0; } static const struct dev_pm_ops omap2430_pm_ops = { .runtime_suspend = omap2430_runtime_suspend, .runtime_resume = omap2430_runtime_resume, + .suspend = omap2430_suspend, + .suspend_late = omap2430_suspend_late, + .resume_early = omap2430_resume_early, + .resume = omap2430_resume, }; #define DEV_PM_OPS (&omap2430_pm_ops) |