diff options
| -rw-r--r-- | drivers/usb/musb/musb_core.c | 255 |
1 files changed, 116 insertions, 139 deletions
diff --git a/drivers/usb/musb/musb_core.c b/drivers/usb/musb/musb_core.c index c4893267..bd14e81 100644 --- a/drivers/usb/musb/musb_core.c +++ b/drivers/usb/musb/musb_core.c @@ -557,6 +557,69 @@ static irqreturn_t musb_stage0_irq(struct musb *musb, u8 int_usb, handled = IRQ_HANDLED; } + + if (int_usb & MUSB_INTR_SUSPEND) { + DBG(1, "SUSPEND (%s) devctl %02x power %02x\n", + otg_state_string(musb), devctl, power); + handled = IRQ_HANDLED; + + switch (musb->xceiv->state) { +#ifdef CONFIG_USB_MUSB_OTG + case OTG_STATE_A_PERIPHERAL: + /* We also come here if the cable is removed, since + * this silicon doesn't report ID-no-longer-grounded. + * + * We depend on T(a_wait_bcon) to shut us down, and + * hope users don't do anything dicey during this + * undesired detour through A_WAIT_BCON. + */ + musb_hnp_stop(musb); + usb_hcd_resume_root_hub(musb_to_hcd(musb)); + musb_root_disconnect(musb); + musb_platform_try_idle(musb, jiffies + + msecs_to_jiffies(musb->a_wait_bcon + ? : OTG_TIME_A_WAIT_BCON)); + + break; +#endif + case OTG_STATE_B_IDLE: + if (!musb->is_active) + break; + case OTG_STATE_B_PERIPHERAL: + musb_g_suspend(musb); + musb->is_active = is_otg_enabled(musb) + && musb->xceiv->gadget->b_hnp_enable; + if (musb->is_active) { +#ifdef CONFIG_USB_MUSB_OTG + musb->xceiv->state = OTG_STATE_B_WAIT_ACON; + DBG(1, "HNP: Setting timer for b_ase0_brst\n"); + mod_timer(&musb->otg_timer, jiffies + + msecs_to_jiffies( + OTG_TIME_B_ASE0_BRST)); +#endif + } + break; + case OTG_STATE_A_WAIT_BCON: + if (musb->a_wait_bcon != 0) + musb_platform_try_idle(musb, jiffies + + msecs_to_jiffies(musb->a_wait_bcon)); + break; + case OTG_STATE_A_HOST: + musb->xceiv->state = OTG_STATE_A_SUSPEND; + musb->is_active = is_otg_enabled(musb) + && musb->xceiv->host->b_hnp_enable; + break; + case OTG_STATE_B_HOST: + /* Transition to B_PERIPHERAL, see 6.8.2.6 p 44 */ + DBG(1, "REVISIT: SUSPEND as B_HOST\n"); + break; + default: + /* "should not happen" */ + musb->is_active = 0; + break; + } + } + if (int_usb & MUSB_INTR_CONNECT) { struct usb_hcd *hcd = musb_to_hcd(musb); @@ -625,10 +688,61 @@ b_host: } #endif /* CONFIG_USB_MUSB_HDRC_HCD */ + if ((int_usb & MUSB_INTR_DISCONNECT) && !musb->ignore_disconnect) { + DBG(1, "DISCONNECT (%s) as %s, devctl %02x\n", + otg_state_string(musb), + MUSB_MODE(musb), devctl); + handled = IRQ_HANDLED; + + switch (musb->xceiv->state) { +#ifdef CONFIG_USB_MUSB_HDRC_HCD + case OTG_STATE_A_HOST: + case OTG_STATE_A_SUSPEND: + usb_hcd_resume_root_hub(musb_to_hcd(musb)); + musb_root_disconnect(musb); + if (musb->a_wait_bcon != 0 && is_otg_enabled(musb)) + musb_platform_try_idle(musb, jiffies + + msecs_to_jiffies(musb->a_wait_bcon)); + break; +#endif /* HOST */ +#ifdef CONFIG_USB_MUSB_OTG + case OTG_STATE_B_HOST: + /* REVISIT this behaves for "real disconnect" + * cases; make sure the other transitions from + * from B_HOST act right too. The B_HOST code + * in hnp_stop() is currently not used... + */ + musb_root_disconnect(musb); + musb_to_hcd(musb)->self.is_b_host = 0; + musb->xceiv->state = OTG_STATE_B_PERIPHERAL; + MUSB_DEV_MODE(musb); + musb_g_disconnect(musb); + break; + case OTG_STATE_A_PERIPHERAL: + musb_hnp_stop(musb); + musb_root_disconnect(musb); + /* FALLTHROUGH */ + case OTG_STATE_B_WAIT_ACON: + /* FALLTHROUGH */ +#endif /* OTG */ +#ifdef CONFIG_USB_GADGET_MUSB_HDRC + case OTG_STATE_B_PERIPHERAL: + case OTG_STATE_B_IDLE: + musb_g_disconnect(musb); + break; +#endif /* GADGET */ + default: + WARNING("unhandled DISCONNECT transition (%s)\n", + otg_state_string(musb)); + break; + } + } + /* mentor saves a bit: bus reset and babble share the same irq. * only host sees babble; only peripheral sees bus reset. */ if (int_usb & MUSB_INTR_RESET) { + handled = IRQ_HANDLED; if (is_host_capable() && (devctl & MUSB_DEVCTL_HM) != 0) { /* * Looks like non-HS BABBLE can be ignored, but @@ -641,7 +755,7 @@ b_host: DBG(1, "BABBLE devctl: %02x\n", devctl); else { ERR("Stopping host session -- babble\n"); - musb_writeb(mbase, MUSB_DEVCTL, 0); + musb_writeb(musb->mregs, MUSB_DEVCTL, 0); } } else if (is_peripheral_capable()) { DBG(1, "BUS RESET as %s\n", otg_state_string(musb)); @@ -686,29 +800,7 @@ b_host: otg_state_string(musb)); } } - - handled = IRQ_HANDLED; } - schedule_work(&musb->irq_work); - - return handled; -} - -/* - * Interrupt Service Routine to record USB "global" interrupts. - * Since these do not happen often and signify things of - * paramount importance, it seems OK to check them individually; - * the order of the tests is specified in the manual - * - * @param musb instance pointer - * @param int_usb register contents - * @param devctl - * @param power - */ -static irqreturn_t musb_stage2_irq(struct musb *musb, u8 int_usb, - u8 devctl, u8 power) -{ - irqreturn_t handled = IRQ_NONE; #if 0 /* REVISIT ... this would be for multiplexing periodic endpoints, or @@ -755,117 +847,7 @@ static irqreturn_t musb_stage2_irq(struct musb *musb, u8 int_usb, } #endif - if ((int_usb & MUSB_INTR_DISCONNECT) && !musb->ignore_disconnect) { - DBG(1, "DISCONNECT (%s) as %s, devctl %02x\n", - otg_state_string(musb), - MUSB_MODE(musb), devctl); - handled = IRQ_HANDLED; - - switch (musb->xceiv->state) { -#ifdef CONFIG_USB_MUSB_HDRC_HCD - case OTG_STATE_A_HOST: - case OTG_STATE_A_SUSPEND: - usb_hcd_resume_root_hub(musb_to_hcd(musb)); - musb_root_disconnect(musb); - if (musb->a_wait_bcon != 0 && is_otg_enabled(musb)) - musb_platform_try_idle(musb, jiffies - + msecs_to_jiffies(musb->a_wait_bcon)); - break; -#endif /* HOST */ -#ifdef CONFIG_USB_MUSB_OTG - case OTG_STATE_B_HOST: - /* REVISIT this behaves for "real disconnect" - * cases; make sure the other transitions from - * from B_HOST act right too. The B_HOST code - * in hnp_stop() is currently not used... - */ - musb_root_disconnect(musb); - musb_to_hcd(musb)->self.is_b_host = 0; - musb->xceiv->state = OTG_STATE_B_PERIPHERAL; - MUSB_DEV_MODE(musb); - musb_g_disconnect(musb); - break; - case OTG_STATE_A_PERIPHERAL: - musb_hnp_stop(musb); - musb_root_disconnect(musb); - /* FALLTHROUGH */ - case OTG_STATE_B_WAIT_ACON: - /* FALLTHROUGH */ -#endif /* OTG */ -#ifdef CONFIG_USB_GADGET_MUSB_HDRC - case OTG_STATE_B_PERIPHERAL: - case OTG_STATE_B_IDLE: - musb_g_disconnect(musb); - break; -#endif /* GADGET */ - default: - WARNING("unhandled DISCONNECT transition (%s)\n", - otg_state_string(musb)); - break; - } - - schedule_work(&musb->irq_work); - } - - if (int_usb & MUSB_INTR_SUSPEND) { - DBG(1, "SUSPEND (%s) devctl %02x power %02x\n", - otg_state_string(musb), devctl, power); - handled = IRQ_HANDLED; - - switch (musb->xceiv->state) { -#ifdef CONFIG_USB_MUSB_OTG - case OTG_STATE_A_PERIPHERAL: - /* We also come here if the cable is removed, since - * this silicon doesn't report ID-no-longer-grounded. - * - * We depend on T(a_wait_bcon) to shut us down, and - * hope users don't do anything dicey during this - * undesired detour through A_WAIT_BCON. - */ - musb_hnp_stop(musb); - usb_hcd_resume_root_hub(musb_to_hcd(musb)); - musb_root_disconnect(musb); - musb_platform_try_idle(musb, jiffies - + msecs_to_jiffies(musb->a_wait_bcon - ? : OTG_TIME_A_WAIT_BCON)); - break; -#endif - case OTG_STATE_B_PERIPHERAL: - musb_g_suspend(musb); - musb->is_active = is_otg_enabled(musb) - && musb->xceiv->gadget->b_hnp_enable; - if (musb->is_active) { -#ifdef CONFIG_USB_MUSB_OTG - musb->xceiv->state = OTG_STATE_B_WAIT_ACON; - DBG(1, "HNP: Setting timer for b_ase0_brst\n"); - mod_timer(&musb->otg_timer, jiffies - + msecs_to_jiffies( - OTG_TIME_B_ASE0_BRST)); -#endif - } - break; - case OTG_STATE_A_WAIT_BCON: - if (musb->a_wait_bcon != 0) - musb_platform_try_idle(musb, jiffies - + msecs_to_jiffies(musb->a_wait_bcon)); - break; - case OTG_STATE_A_HOST: - musb->xceiv->state = OTG_STATE_A_SUSPEND; - musb->is_active = is_otg_enabled(musb) - && musb->xceiv->host->b_hnp_enable; - break; - case OTG_STATE_B_HOST: - /* Transition to B_PERIPHERAL, see 6.8.2.6 p 44 */ - DBG(1, "REVISIT: SUSPEND as B_HOST\n"); - break; - default: - /* "should not happen" */ - musb->is_active = 0; - break; - } - schedule_work(&musb->irq_work); - } - + schedule_work(&musb->irq_work); return handled; } @@ -1597,11 +1579,6 @@ irqreturn_t musb_interrupt(struct musb *musb) ep_num++; } - /* finish handling "global" interrupts after handling fifos */ - if (musb->int_usb) - retval |= musb_stage2_irq(musb, - musb->int_usb, devctl, power); - return retval; } |
