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path: root/drivers/usb/musb/musb_core.c
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Diffstat (limited to 'drivers/usb/musb/musb_core.c')
-rw-r--r--drivers/usb/musb/musb_core.c228
1 files changed, 127 insertions, 101 deletions
diff --git a/drivers/usb/musb/musb_core.c b/drivers/usb/musb/musb_core.c
index 4000cf6d1e8..554a414f65d 100644
--- a/drivers/usb/musb/musb_core.c
+++ b/drivers/usb/musb/musb_core.c
@@ -112,6 +112,7 @@
#include "davinci.h"
#endif
+#define TA_WAIT_BCON(m) max_t(int, (m)->a_wait_bcon, OTG_TIME_A_WAIT_BCON)
unsigned musb_debug;
@@ -267,7 +268,7 @@ void musb_load_testpacket(struct musb *musb)
const char *otg_state_string(struct musb *musb)
{
- switch (musb->xceiv.state) {
+ switch (musb->xceiv->state) {
case OTG_STATE_A_IDLE: return "a_idle";
case OTG_STATE_A_WAIT_VRISE: return "a_wait_vrise";
case OTG_STATE_A_WAIT_BCON: return "a_wait_bcon";
@@ -288,12 +289,6 @@ const char *otg_state_string(struct musb *musb)
#ifdef CONFIG_USB_MUSB_OTG
/*
- * See also USB_OTG_1-3.pdf 6.6.5 Timers
- * REVISIT: Are the other timers done in the hardware?
- */
-#define TB_ASE0_BRST 100 /* Min 3.125 ms */
-
-/*
* Handles OTG hnp timeouts, such as b_ase0_brst
*/
void musb_otg_timer_func(unsigned long data)
@@ -302,16 +297,18 @@ void musb_otg_timer_func(unsigned long data)
unsigned long flags;
spin_lock_irqsave(&musb->lock, flags);
- switch (musb->xceiv.state) {
+ switch (musb->xceiv->state) {
case OTG_STATE_B_WAIT_ACON:
DBG(1, "HNP: b_wait_acon timeout; back to b_peripheral\n");
musb_g_disconnect(musb);
- musb->xceiv.state = OTG_STATE_B_PERIPHERAL;
+ musb->xceiv->state = OTG_STATE_B_PERIPHERAL;
musb->is_active = 0;
break;
+ case OTG_STATE_A_SUSPEND:
case OTG_STATE_A_WAIT_BCON:
- DBG(1, "HNP: a_wait_bcon timeout; back to a_host\n");
- musb_hnp_stop(musb);
+ DBG(1, "HNP: %s timeout\n", otg_state_string(musb));
+ musb_set_vbus(musb, 0);
+ musb->xceiv->state = OTG_STATE_A_WAIT_VFALL;
break;
default:
DBG(1, "HNP: Unhandled mode %s\n", otg_state_string(musb));
@@ -320,10 +317,8 @@ void musb_otg_timer_func(unsigned long data)
spin_unlock_irqrestore(&musb->lock, flags);
}
-static DEFINE_TIMER(musb_otg_timer, musb_otg_timer_func, 0, 0);
-
/*
- * Stops the B-device HNP state. Caller must take care of locking.
+ * Stops the HNP transition. Caller must take care of locking.
*/
void musb_hnp_stop(struct musb *musb)
{
@@ -331,20 +326,17 @@ void musb_hnp_stop(struct musb *musb)
void __iomem *mbase = musb->mregs;
u8 reg;
- switch (musb->xceiv.state) {
+ DBG(1, "HNP: stop from %s\n", otg_state_string(musb));
+
+ switch (musb->xceiv->state) {
case OTG_STATE_A_PERIPHERAL:
- case OTG_STATE_A_WAIT_VFALL:
- case OTG_STATE_A_WAIT_BCON:
- DBG(1, "HNP: Switching back to A-host\n");
musb_g_disconnect(musb);
- musb->xceiv.state = OTG_STATE_A_IDLE;
- MUSB_HST_MODE(musb);
- musb->is_active = 0;
+ DBG(1, "HNP: back to %s\n", otg_state_string(musb));
break;
case OTG_STATE_B_HOST:
DBG(1, "HNP: Disabling HR\n");
hcd->self.is_b_host = 0;
- musb->xceiv.state = OTG_STATE_B_PERIPHERAL;
+ musb->xceiv->state = OTG_STATE_B_PERIPHERAL;
MUSB_DEV_MODE(musb);
reg = musb_readb(mbase, MUSB_POWER);
reg |= MUSB_POWER_SUSPENDM;
@@ -402,7 +394,7 @@ static irqreturn_t musb_stage0_irq(struct musb *musb, u8 int_usb,
if (devctl & MUSB_DEVCTL_HM) {
#ifdef CONFIG_USB_MUSB_HDRC_HCD
- switch (musb->xceiv.state) {
+ switch (musb->xceiv->state) {
case OTG_STATE_A_SUSPEND:
/* remote wakeup? later, GetPortStatus
* will stop RESUME signaling
@@ -425,12 +417,12 @@ static irqreturn_t musb_stage0_irq(struct musb *musb, u8 int_usb,
musb->rh_timer = jiffies
+ msecs_to_jiffies(20);
- musb->xceiv.state = OTG_STATE_A_HOST;
+ musb->xceiv->state = OTG_STATE_A_HOST;
musb->is_active = 1;
usb_hcd_resume_root_hub(musb_to_hcd(musb));
break;
case OTG_STATE_B_WAIT_ACON:
- musb->xceiv.state = OTG_STATE_B_PERIPHERAL;
+ musb->xceiv->state = OTG_STATE_B_PERIPHERAL;
musb->is_active = 1;
MUSB_DEV_MODE(musb);
break;
@@ -441,11 +433,11 @@ static irqreturn_t musb_stage0_irq(struct musb *musb, u8 int_usb,
}
#endif
} else {
- switch (musb->xceiv.state) {
+ switch (musb->xceiv->state) {
#ifdef CONFIG_USB_MUSB_HDRC_HCD
case OTG_STATE_A_SUSPEND:
/* possibly DISCONNECT is upcoming */
- musb->xceiv.state = OTG_STATE_A_HOST;
+ musb->xceiv->state = OTG_STATE_A_HOST;
usb_hcd_resume_root_hub(musb_to_hcd(musb));
break;
#endif
@@ -490,7 +482,7 @@ static irqreturn_t musb_stage0_irq(struct musb *musb, u8 int_usb,
*/
musb_writeb(mbase, MUSB_DEVCTL, MUSB_DEVCTL_SESSION);
musb->ep0_stage = MUSB_EP0_START;
- musb->xceiv.state = OTG_STATE_A_IDLE;
+ musb->xceiv->state = OTG_STATE_A_IDLE;
MUSB_HST_MODE(musb);
musb_set_vbus(musb, 1);
@@ -516,7 +508,7 @@ static irqreturn_t musb_stage0_irq(struct musb *musb, u8 int_usb,
* REVISIT: do delays from lots of DEBUG_KERNEL checks
* make trouble here, keeping VBUS < 4.4V ?
*/
- switch (musb->xceiv.state) {
+ switch (musb->xceiv->state) {
case OTG_STATE_A_HOST:
/* recovery is dicey once we've gotten past the
* initial stages of enumeration, but if VBUS
@@ -594,37 +586,40 @@ static irqreturn_t musb_stage0_irq(struct musb *musb, u8 int_usb,
if (devctl & MUSB_DEVCTL_LSDEV)
musb->port1_status |= USB_PORT_STAT_LOW_SPEED;
- if (hcd->status_urb)
- usb_hcd_poll_rh_status(hcd);
- else
- usb_hcd_resume_root_hub(hcd);
-
- MUSB_HST_MODE(musb);
-
/* indicate new connection to OTG machine */
- switch (musb->xceiv.state) {
+ switch (musb->xceiv->state) {
case OTG_STATE_B_PERIPHERAL:
if (int_usb & MUSB_INTR_SUSPEND) {
DBG(1, "HNP: SUSPEND+CONNECT, now b_host\n");
- musb->xceiv.state = OTG_STATE_B_HOST;
- hcd->self.is_b_host = 1;
int_usb &= ~MUSB_INTR_SUSPEND;
+ goto b_host;
} else
DBG(1, "CONNECT as b_peripheral???\n");
break;
case OTG_STATE_B_WAIT_ACON:
- DBG(1, "HNP: Waiting to switch to b_host state\n");
- musb->xceiv.state = OTG_STATE_B_HOST;
+ DBG(1, "HNP: CONNECT, now b_host\n");
+b_host:
+ musb->xceiv->state = OTG_STATE_B_HOST;
hcd->self.is_b_host = 1;
+ musb->ignore_disconnect = 0;
+ del_timer(&musb->otg_timer);
break;
default:
if ((devctl & MUSB_DEVCTL_VBUS)
== (3 << MUSB_DEVCTL_VBUS_SHIFT)) {
- musb->xceiv.state = OTG_STATE_A_HOST;
+ musb->xceiv->state = OTG_STATE_A_HOST;
hcd->self.is_b_host = 0;
}
break;
}
+
+ /* poke the root hub */
+ MUSB_HST_MODE(musb);
+ if (hcd->status_urb)
+ usb_hcd_poll_rh_status(hcd);
+ else
+ usb_hcd_resume_root_hub(hcd);
+
DBG(1, "CONNECT (%s) devctl %02x\n",
otg_state_string(musb), devctl);
}
@@ -650,7 +645,7 @@ static irqreturn_t musb_stage0_irq(struct musb *musb, u8 int_usb,
}
} else if (is_peripheral_capable()) {
DBG(1, "BUS RESET as %s\n", otg_state_string(musb));
- switch (musb->xceiv.state) {
+ switch (musb->xceiv->state) {
#ifdef CONFIG_USB_OTG
case OTG_STATE_A_SUSPEND:
/* We need to ignore disconnect on suspend
@@ -661,24 +656,27 @@ static irqreturn_t musb_stage0_irq(struct musb *musb, u8 int_usb,
musb_g_reset(musb);
/* FALLTHROUGH */
case OTG_STATE_A_WAIT_BCON: /* OPT TD.4.7-900ms */
- DBG(1, "HNP: Setting timer as %s\n",
- otg_state_string(musb));
- musb_otg_timer.data = (unsigned long)musb;
- mod_timer(&musb_otg_timer, jiffies
- + msecs_to_jiffies(100));
+ /* never use invalid T(a_wait_bcon) */
+ DBG(1, "HNP: in %s, %d msec timeout\n",
+ otg_state_string(musb),
+ TA_WAIT_BCON(musb));
+ mod_timer(&musb->otg_timer, jiffies
+ + msecs_to_jiffies(TA_WAIT_BCON(musb)));
break;
case OTG_STATE_A_PERIPHERAL:
- musb_hnp_stop(musb);
+ musb->ignore_disconnect = 0;
+ del_timer(&musb->otg_timer);
+ musb_g_reset(musb);
break;
case OTG_STATE_B_WAIT_ACON:
DBG(1, "HNP: RESET (%s), to b_peripheral\n",
otg_state_string(musb));
- musb->xceiv.state = OTG_STATE_B_PERIPHERAL;
+ musb->xceiv->state = OTG_STATE_B_PERIPHERAL;
musb_g_reset(musb);
break;
#endif
case OTG_STATE_B_IDLE:
- musb->xceiv.state = OTG_STATE_B_PERIPHERAL;
+ musb->xceiv->state = OTG_STATE_B_PERIPHERAL;
/* FALLTHROUGH */
case OTG_STATE_B_PERIPHERAL:
musb_g_reset(musb);
@@ -763,7 +761,7 @@ static irqreturn_t musb_stage2_irq(struct musb *musb, u8 int_usb,
MUSB_MODE(musb), devctl);
handled = IRQ_HANDLED;
- switch (musb->xceiv.state) {
+ switch (musb->xceiv->state) {
#ifdef CONFIG_USB_MUSB_HDRC_HCD
case OTG_STATE_A_HOST:
case OTG_STATE_A_SUSPEND:
@@ -776,7 +774,16 @@ static irqreturn_t musb_stage2_irq(struct musb *musb, u8 int_usb,
#endif /* HOST */
#ifdef CONFIG_USB_MUSB_OTG
case OTG_STATE_B_HOST:
- musb_hnp_stop(musb);
+ /* 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);
@@ -805,26 +812,35 @@ static irqreturn_t musb_stage2_irq(struct musb *musb, u8 int_usb,
otg_state_string(musb), devctl, power);
handled = IRQ_HANDLED;
- switch (musb->xceiv.state) {
+ switch (musb->xceiv->state) {
#ifdef CONFIG_USB_MUSB_OTG
case OTG_STATE_A_PERIPHERAL:
- /*
- * We cannot stop HNP here, devctl BDEVICE might be
- * still set.
+ /* 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;
+ && musb->xceiv->gadget->b_hnp_enable;
if (musb->is_active) {
#ifdef CONFIG_USB_MUSB_OTG
- musb->xceiv.state = OTG_STATE_B_WAIT_ACON;
+ musb->xceiv->state = OTG_STATE_B_WAIT_ACON;
DBG(1, "HNP: Setting timer for b_ase0_brst\n");
- musb_otg_timer.data = (unsigned long)musb;
- mod_timer(&musb_otg_timer, jiffies
- + msecs_to_jiffies(TB_ASE0_BRST));
+ mod_timer(&musb->otg_timer, jiffies
+ + msecs_to_jiffies(
+ OTG_TIME_B_ASE0_BRST));
#endif
}
break;
@@ -834,9 +850,9 @@ static irqreturn_t musb_stage2_irq(struct musb *musb, u8 int_usb,
+ msecs_to_jiffies(musb->a_wait_bcon));
break;
case OTG_STATE_A_HOST:
- musb->xceiv.state = OTG_STATE_A_SUSPEND;
+ musb->xceiv->state = OTG_STATE_A_SUSPEND;
musb->is_active = is_otg_enabled(musb)
- && musb->xceiv.host->b_hnp_enable;
+ && musb->xceiv->host->b_hnp_enable;
break;
case OTG_STATE_B_HOST:
/* Transition to B_PERIPHERAL, see 6.8.2.6 p 44 */
@@ -1068,14 +1084,13 @@ static struct fifo_cfg __initdata mode_4_cfg[] = {
{ .hw_ep_num = 8, .style = FIFO_RX, .maxpacket = 512, },
{ .hw_ep_num = 9, .style = FIFO_TX, .maxpacket = 512, },
{ .hw_ep_num = 9, .style = FIFO_RX, .maxpacket = 512, },
-{ .hw_ep_num = 10, .style = FIFO_TX, .maxpacket = 512, },
-{ .hw_ep_num = 10, .style = FIFO_RX, .maxpacket = 512, },
-{ .hw_ep_num = 11, .style = FIFO_TX, .maxpacket = 512, },
-{ .hw_ep_num = 11, .style = FIFO_RX, .maxpacket = 512, },
-{ .hw_ep_num = 12, .style = FIFO_TX, .maxpacket = 512, },
-{ .hw_ep_num = 12, .style = FIFO_RX, .maxpacket = 512, },
-{ .hw_ep_num = 13, .style = FIFO_TX, .maxpacket = 512, },
-{ .hw_ep_num = 13, .style = FIFO_RX, .maxpacket = 512, },
+{ .hw_ep_num = 10, .style = FIFO_TX, .maxpacket = 256, },
+{ .hw_ep_num = 10, .style = FIFO_RX, .maxpacket = 64, },
+{ .hw_ep_num = 11, .style = FIFO_TX, .maxpacket = 256, },
+{ .hw_ep_num = 11, .style = FIFO_RX, .maxpacket = 64, },
+{ .hw_ep_num = 12, .style = FIFO_TX, .maxpacket = 256, },
+{ .hw_ep_num = 12, .style = FIFO_RX, .maxpacket = 64, },
+{ .hw_ep_num = 13, .style = FIFO_RXTX, .maxpacket = 4096, },
{ .hw_ep_num = 14, .style = FIFO_RXTX, .maxpacket = 1024, },
{ .hw_ep_num = 15, .style = FIFO_RXTX, .maxpacket = 1024, },
};
@@ -1335,11 +1350,11 @@ static int __init musb_core_init(u16 musb_type, struct musb *musb)
}
if (reg & MUSB_CONFIGDATA_HBRXE) {
strcat(aInfo, ", HB-ISO Rx");
- strcat(aInfo, " (X)"); /* no driver support */
+ musb->hb_iso_rx = true;
}
if (reg & MUSB_CONFIGDATA_HBTXE) {
strcat(aInfo, ", HB-ISO Tx");
- strcat(aInfo, " (X)"); /* no driver support */
+ musb->hb_iso_tx = true;
}
if (reg & MUSB_CONFIGDATA_SOFTCONE)
strcat(aInfo, ", SoftConn");
@@ -1481,13 +1496,7 @@ static irqreturn_t generic_interrupt(int irq, void *__hci)
spin_unlock_irqrestore(&musb->lock, flags);
- /* REVISIT we sometimes get spurious IRQs on g_ep0
- * not clear why...
- */
- if (retval != IRQ_HANDLED)
- DBG(5, "spurious?\n");
-
- return IRQ_HANDLED;
+ return retval;
}
#else
@@ -1687,8 +1696,9 @@ musb_vbus_store(struct device *dev, struct device_attribute *attr,
}
spin_lock_irqsave(&musb->lock, flags);
- musb->a_wait_bcon = val;
- if (musb->xceiv.state == OTG_STATE_A_WAIT_BCON)
+ /* force T(a_wait_bcon) to be zero/unlimited *OR* valid */
+ musb->a_wait_bcon = val ? max_t(int, val, OTG_TIME_A_WAIT_BCON) : 0 ;
+ if (musb->xceiv->state == OTG_STATE_A_WAIT_BCON)
musb->is_active = 0;
musb_platform_try_idle(musb, jiffies + msecs_to_jiffies(val));
spin_unlock_irqrestore(&musb->lock, flags);
@@ -1706,10 +1716,13 @@ musb_vbus_show(struct device *dev, struct device_attribute *attr, char *buf)
spin_lock_irqsave(&musb->lock, flags);
val = musb->a_wait_bcon;
+ /* FIXME get_vbus_status() is normally #defined as false...
+ * and is effectively TUSB-specific.
+ */
vbus = musb_platform_get_vbus_status(musb);
spin_unlock_irqrestore(&musb->lock, flags);
- return sprintf(buf, "Vbus %s, timeout %lu\n",
+ return sprintf(buf, "Vbus %s, timeout %lu msec\n",
vbus ? "on" : "off", val);
}
static DEVICE_ATTR(vbus, 0644, musb_vbus_show, musb_vbus_store);
@@ -1749,8 +1762,8 @@ static void musb_irq_work(struct work_struct *data)
struct musb *musb = container_of(data, struct musb, irq_work);
static int old_state;
- if (musb->xceiv.state != old_state) {
- old_state = musb->xceiv.state;
+ if (musb->xceiv->state != old_state) {
+ old_state = musb->xceiv->state;
sysfs_notify(&musb->controller->kobj, NULL, "mode");
}
}
@@ -1782,6 +1795,7 @@ allocate_instance(struct device *dev,
hcd->uses_new_polling = 1;
musb->vbuserr_retry = VBUSERR_RETRY_COUNT;
+ musb->a_wait_bcon = OTG_TIME_A_WAIT_BCON;
#else
musb = kzalloc(sizeof *musb, GFP_KERNEL);
if (!musb)
@@ -1847,7 +1861,7 @@ static void musb_free(struct musb *musb)
}
#ifdef CONFIG_USB_MUSB_OTG
- put_device(musb->xceiv.dev);
+ put_device(musb->xceiv->dev);
#endif
#ifdef CONFIG_USB_MUSB_HDRC_HCD
@@ -1928,10 +1942,18 @@ bad_config:
}
}
- /* assume vbus is off */
-
- /* platform adjusts musb->mregs and musb->isr if needed,
- * and activates clocks
+ /* The musb_platform_init() call:
+ * - adjusts musb->mregs and musb->isr if needed,
+ * - may initialize an integrated tranceiver
+ * - initializes musb->xceiv, usually by otg_get_transceiver()
+ * - activates clocks.
+ * - stops powering VBUS
+ * - assigns musb->board_set_vbus if host mode is enabled
+ *
+ * There are various transciever configurations. Blackfin,
+ * DaVinci, TUSB60x0, and others integrate them. OMAP3 uses
+ * external/discrete ones in various flavors (twl4030 family,
+ * isp1504, non-OTG, etc) mostly hooking up through ULPI.
*/
musb->isr = generic_interrupt;
status = musb_platform_init(musb);
@@ -1968,6 +1990,10 @@ bad_config:
if (status < 0)
goto fail2;
+#ifdef CONFIG_USB_OTG
+ setup_timer(&musb->otg_timer, musb_otg_timer_func, (unsigned long) musb);
+#endif
+
/* Init IRQ workqueue before request_irq */
INIT_WORK(&musb->irq_work, musb_irq_work);
@@ -1999,17 +2025,17 @@ bad_config:
? "DMA" : "PIO",
musb->nIrq);
-#ifdef CONFIG_USB_MUSB_HDRC_HCD
- /* host side needs more setup, except for no-host modes */
- if (musb->board_mode != MUSB_PERIPHERAL) {
+ /* host side needs more setup */
+ if (is_host_enabled(musb)) {
struct usb_hcd *hcd = musb_to_hcd(musb);
- if (musb->board_mode == MUSB_OTG)
+ otg_set_host(musb->xceiv, &hcd->self);
+
+ if (is_otg_enabled(musb))
hcd->self.otg_port = 1;
- musb->xceiv.host = &hcd->self;
+ musb->xceiv->host = &hcd->self;
hcd->power_budget = 2 * (plat->power ? : 250);
}
-#endif /* CONFIG_USB_MUSB_HDRC_HCD */
/* For the host-only role, we can activate right away.
* (We expect the ID pin to be forcibly grounded!!)
@@ -2017,8 +2043,8 @@ bad_config:
*/
if (!is_otg_enabled(musb) && is_host_enabled(musb)) {
MUSB_HST_MODE(musb);
- musb->xceiv.default_a = 1;
- musb->xceiv.state = OTG_STATE_A_IDLE;
+ musb->xceiv->default_a = 1;
+ musb->xceiv->state = OTG_STATE_A_IDLE;
status = usb_add_hcd(musb_to_hcd(musb), -1, 0);
if (status)
@@ -2033,8 +2059,8 @@ bad_config:
} else /* peripheral is enabled */ {
MUSB_DEV_MODE(musb);
- musb->xceiv.default_a = 0;
- musb->xceiv.state = OTG_STATE_B_IDLE;
+ musb->xceiv->default_a = 0;
+ musb->xceiv->state = OTG_STATE_B_IDLE;
status = musb_gadget_setup(musb);
if (status)
generated by cgit v1.2.3 (git 2.39.1) at 2024-05-17 21:21:31 +0000