diff options
Diffstat (limited to 'drivers/usb/musb/blackfin.c')
| -rw-r--r-- | drivers/usb/musb/blackfin.c | 104 |
1 files changed, 69 insertions, 35 deletions
diff --git a/drivers/usb/musb/blackfin.c b/drivers/usb/musb/blackfin.c index 719a22d664e..b611420a805 100644 --- a/drivers/usb/musb/blackfin.c +++ b/drivers/usb/musb/blackfin.c @@ -170,15 +170,16 @@ static irqreturn_t blackfin_interrupt(int irq, void *__hci) retval = musb_interrupt(musb); } - spin_unlock_irqrestore(&musb->lock, flags); + /* Start sampling ID pin, when plug is removed from MUSB */ + if (is_otg_enabled(musb) && (musb->xceiv->state == OTG_STATE_B_IDLE + || musb->xceiv->state == OTG_STATE_A_WAIT_BCON)) { + mod_timer(&musb_conn_timer, jiffies + TIMER_DELAY); + musb->a_wait_bcon = TIMER_DELAY; + } - /* REVISIT we sometimes get spurious IRQs on g_ep0 - * not clear why... fall in BF54x too. - */ - if (retval != IRQ_HANDLED) - DBG(5, "spurious?\n"); + spin_unlock_irqrestore(&musb->lock, flags); - return IRQ_HANDLED; + return retval; } static void musb_conn_timer_handler(unsigned long _musb) @@ -186,6 +187,7 @@ static void musb_conn_timer_handler(unsigned long _musb) struct musb *musb = (void *)_musb; unsigned long flags; u16 val; + static u8 toggle; spin_lock_irqsave(&musb->lock, flags); switch (musb->xceiv->state) { @@ -193,10 +195,44 @@ static void musb_conn_timer_handler(unsigned long _musb) case OTG_STATE_A_WAIT_BCON: /* Start a new session */ val = musb_readw(musb->mregs, MUSB_DEVCTL); + val &= ~MUSB_DEVCTL_SESSION; + musb_writew(musb->mregs, MUSB_DEVCTL, val); val |= MUSB_DEVCTL_SESSION; musb_writew(musb->mregs, MUSB_DEVCTL, val); + /* Check if musb is host or peripheral. */ + val = musb_readw(musb->mregs, MUSB_DEVCTL); + if (!(val & MUSB_DEVCTL_BDEVICE)) { + gpio_set_value(musb->config->gpio_vrsel, 1); + musb->xceiv->state = OTG_STATE_A_WAIT_BCON; + } else { + gpio_set_value(musb->config->gpio_vrsel, 0); + /* Ignore VBUSERROR and SUSPEND IRQ */ + val = musb_readb(musb->mregs, MUSB_INTRUSBE); + val &= ~MUSB_INTR_VBUSERROR; + musb_writeb(musb->mregs, MUSB_INTRUSBE, val); + + val = MUSB_INTR_SUSPEND | MUSB_INTR_VBUSERROR; + musb_writeb(musb->mregs, MUSB_INTRUSB, val); + if (is_otg_enabled(musb)) + musb->xceiv->state = OTG_STATE_B_IDLE; + else + musb_writeb(musb->mregs, MUSB_POWER, MUSB_POWER_HSENAB); + } + mod_timer(&musb_conn_timer, jiffies + TIMER_DELAY); + break; + case OTG_STATE_B_IDLE: + + if (!is_peripheral_enabled(musb)) + break; + /* Start a new session. It seems that MUSB needs taking + * some time to recognize the type of the plug inserted? + */ + val = musb_readw(musb->mregs, MUSB_DEVCTL); + val |= MUSB_DEVCTL_SESSION; + musb_writew(musb->mregs, MUSB_DEVCTL, val); val = musb_readw(musb->mregs, MUSB_DEVCTL); + if (!(val & MUSB_DEVCTL_BDEVICE)) { gpio_set_value(musb->config->gpio_vrsel, 1); musb->xceiv->state = OTG_STATE_A_WAIT_BCON; @@ -211,12 +247,27 @@ static void musb_conn_timer_handler(unsigned long _musb) val = MUSB_INTR_SUSPEND | MUSB_INTR_VBUSERROR; musb_writeb(musb->mregs, MUSB_INTRUSB, val); - val = MUSB_POWER_HSENAB; - musb_writeb(musb->mregs, MUSB_POWER, val); + /* Toggle the Soft Conn bit, so that we can response to + * the inserting of either A-plug or B-plug. + */ + if (toggle) { + val = musb_readb(musb->mregs, MUSB_POWER); + val &= ~MUSB_POWER_SOFTCONN; + musb_writeb(musb->mregs, MUSB_POWER, val); + toggle = 0; + } else { + val = musb_readb(musb->mregs, MUSB_POWER); + val |= MUSB_POWER_SOFTCONN; + musb_writeb(musb->mregs, MUSB_POWER, val); + toggle = 1; + } + /* The delay time is set to 1/4 second by default, + * shortening it, if accelerating A-plug detection + * is needed in OTG mode. + */ + mod_timer(&musb_conn_timer, jiffies + TIMER_DELAY / 4); } - mod_timer(&musb_conn_timer, jiffies + TIMER_DELAY); break; - default: DBG(1, "%s state not handled\n", otg_state_string(musb)); break; @@ -228,7 +279,7 @@ static void musb_conn_timer_handler(unsigned long _musb) void musb_platform_enable(struct musb *musb) { - if (is_host_enabled(musb)) { + if (!is_otg_enabled(musb) && is_host_enabled(musb)) { mod_timer(&musb_conn_timer, jiffies + TIMER_DELAY); musb->a_wait_bcon = TIMER_DELAY; } @@ -238,16 +289,12 @@ void musb_platform_disable(struct musb *musb) { } -static void bfin_vbus_power(struct musb *musb, int is_on, int sleeping) -{ -} - static void bfin_set_vbus(struct musb *musb, int is_on) { - if (is_on) - gpio_set_value(musb->config->gpio_vrsel, 1); - else - gpio_set_value(musb->config->gpio_vrsel, 0); + int value = musb->config->gpio_vrsel_active; + if (!is_on) + value = !value; + gpio_set_value(musb->config->gpio_vrsel, value); DBG(1, "VBUS %s, devctl %02x " /* otg %3x conf %08x prcm %08x */ "\n", @@ -262,7 +309,7 @@ static int bfin_set_power(struct otg_transceiver *x, unsigned mA) void musb_platform_try_idle(struct musb *musb, unsigned long timeout) { - if (is_host_enabled(musb)) + if (!is_otg_enabled(musb) && is_host_enabled(musb)) mod_timer(&musb_conn_timer, jiffies + TIMER_DELAY); } @@ -276,7 +323,7 @@ int musb_platform_set_mode(struct musb *musb, u8 musb_mode) return -EIO; } -int __init musb_platform_init(struct musb *musb) +int __init musb_platform_init(struct musb *musb, void *board_data) { /* @@ -345,23 +392,10 @@ int __init musb_platform_init(struct musb *musb) return 0; } -int musb_platform_suspend(struct musb *musb) -{ - return 0; -} - -int musb_platform_resume(struct musb *musb) -{ - return 0; -} - - int musb_platform_exit(struct musb *musb) { - bfin_vbus_power(musb, 0 /*off*/, 1); gpio_free(musb->config->gpio_vrsel); - musb_platform_suspend(musb); return 0; } |