static irqreturn_t omap_otg_irq(int irq, void *arg)
{
struct platform_device *otg_dev = (struct platform_device *) arg;
struct tahvo_usb *tu = (struct tahvo_usb *) otg_dev->dev.driver_data;
u16 otg_irq;
otg_irq = OTG_IRQ_SRC_REG;
if (otg_irq & OPRT_CHG) {
OTG_IRQ_SRC_REG = OPRT_CHG;
} else if (otg_irq & B_SRP_TMROUT) {
OTG_IRQ_SRC_REG = B_SRP_TMROUT;
} else if (otg_irq & B_HNP_FAIL) {
OTG_IRQ_SRC_REG = B_HNP_FAIL;
} else if (otg_irq & A_SRP_DETECT) {
OTG_IRQ_SRC_REG = A_SRP_DETECT;
} else if (otg_irq & A_REQ_TMROUT) {
OTG_IRQ_SRC_REG = A_REQ_TMROUT;
} else if (otg_irq & A_VBUS_ERR) {
OTG_IRQ_SRC_REG = A_VBUS_ERR;
} else if (otg_irq & DRIVER_SWITCH) {
if ((!(OTG_CTRL_REG & OTG_DRIVER_SEL)) &&
tu->otg.host && tu->otg.state == OTG_STATE_A_HOST) {
/* role is host */
usb_bus_start_enum(tu->otg.host,
tu->otg.host->otg_port);
}
OTG_IRQ_SRC_REG = DRIVER_SWITCH;
} else
return IRQ_NONE;
return IRQ_HANDLED;
}
static irqreturn_t omap_otg_irq(int irq, void *arg)
{
u16 otg_irq;
otg_irq = omap_readw(OTG_IRQ_SRC);
if (otg_irq & OPRT_CHG) {
omap_writew(OPRT_CHG, OTG_IRQ_SRC);
} else if (otg_irq & B_SRP_TMROUT) {
omap_writew(B_SRP_TMROUT, OTG_IRQ_SRC);
} else if (otg_irq & B_HNP_FAIL) {
omap_writew(B_HNP_FAIL, OTG_IRQ_SRC);
} else if (otg_irq & A_SRP_DETECT) {
omap_writew(A_SRP_DETECT, OTG_IRQ_SRC);
} else if (otg_irq & A_REQ_TMROUT) {
omap_writew(A_REQ_TMROUT, OTG_IRQ_SRC);
} else if (otg_irq & A_VBUS_ERR) {
omap_writew(A_VBUS_ERR, OTG_IRQ_SRC);
} else if (otg_irq & DRIVER_SWITCH) {
#ifdef CONFIG_USB_OTG
if ((!(omap_readl(OTG_CTRL) & OTG_DRIVER_SEL)) &&
tu->otg.host && tu->otg.state == OTG_STATE_A_HOST) {
/* role is host */
usb_bus_start_enum(tu->otg.host,
tu->otg.host->otg_port);
}
#endif
omap_writew(DRIVER_SWITCH, OTG_IRQ_SRC);
} else
return IRQ_NONE;
return IRQ_HANDLED;
}
/* Called when entering a state */
int otg_set_state(struct otg_fsm *fsm, enum usb_otg_state new_state)
{
state_changed = 1;
if (fsm->transceiver->state == new_state)
return 0;
VDBG("chg state to %s", state_string(new_state));
otg_leave_state(fsm, fsm->transceiver->state);
switch (new_state) {
case OTG_STATE_B_IDLE:
otg_drv_vbus(fsm, 0);
otg_chrg_vbus(fsm, 0);
otg_loc_conn(fsm, 0);
otg_loc_sof(fsm, 0);
otg_set_protocol(fsm, PROTO_UNDEF);
otg_add_timer(fsm, b_se0_srp_tmr);
break;
case OTG_STATE_B_SRP_INIT:
otg_start_pulse(fsm);
otg_loc_sof(fsm, 0);
otg_set_protocol(fsm, PROTO_UNDEF);
otg_add_timer(fsm, b_srp_fail_tmr);
break;
case OTG_STATE_B_PERIPHERAL:
otg_chrg_vbus(fsm, 0);
otg_loc_conn(fsm, 1);
otg_loc_sof(fsm, 0);
otg_set_protocol(fsm, PROTO_GADGET);
break;
case OTG_STATE_B_WAIT_ACON:
otg_chrg_vbus(fsm, 0);
otg_loc_conn(fsm, 0);
otg_loc_sof(fsm, 0);
otg_set_protocol(fsm, PROTO_HOST);
otg_add_timer(fsm, b_ase0_brst_tmr);
fsm->a_bus_suspend = 0;
break;
case OTG_STATE_B_HOST:
otg_chrg_vbus(fsm, 0);
otg_loc_conn(fsm, 0);
otg_loc_sof(fsm, 1);
otg_set_protocol(fsm, PROTO_HOST);
usb_bus_start_enum(fsm->transceiver->host,
fsm->transceiver->host->otg_port);
break;
case OTG_STATE_A_IDLE:
otg_drv_vbus(fsm, 0);
otg_chrg_vbus(fsm, 0);
otg_loc_conn(fsm, 0);
otg_loc_sof(fsm, 0);
otg_set_protocol(fsm, PROTO_HOST);
break;
case OTG_STATE_A_WAIT_VRISE:
otg_drv_vbus(fsm, 1);
otg_loc_conn(fsm, 0);
otg_loc_sof(fsm, 0);
otg_set_protocol(fsm, PROTO_HOST);
otg_add_timer(fsm, a_wait_vrise_tmr);
break;
case OTG_STATE_A_WAIT_BCON:
otg_drv_vbus(fsm, 1);
otg_loc_conn(fsm, 0);
otg_loc_sof(fsm, 0);
otg_set_protocol(fsm, PROTO_HOST);
otg_add_timer(fsm, a_wait_bcon_tmr);
break;
case OTG_STATE_A_HOST:
otg_drv_vbus(fsm, 1);
otg_loc_conn(fsm, 0);
otg_loc_sof(fsm, 1);
otg_set_protocol(fsm, PROTO_HOST);
/* When HNP is triggered while a_bus_req = 0, a_host will
* suspend too fast to complete a_set_b_hnp_en
*/
if (!fsm->a_bus_req || fsm->a_suspend_req)
otg_add_timer(fsm, a_wait_enum_tmr);
break;
case OTG_STATE_A_SUSPEND:
otg_drv_vbus(fsm, 1);
otg_loc_conn(fsm, 0);
otg_loc_sof(fsm, 0);
otg_set_protocol(fsm, PROTO_HOST);
otg_add_timer(fsm, a_aidl_bdis_tmr);
break;
case OTG_STATE_A_PERIPHERAL:
otg_loc_conn(fsm, 1);
otg_loc_sof(fsm, 0);
otg_set_protocol(fsm, PROTO_GADGET);
otg_drv_vbus(fsm, 1);
break;
case OTG_STATE_A_WAIT_VFALL:
otg_drv_vbus(fsm, 0);
otg_loc_conn(fsm, 0);
otg_loc_sof(fsm, 0);
otg_set_protocol(fsm, PROTO_HOST);
break;
case OTG_STATE_A_VBUS_ERR:
otg_drv_vbus(fsm, 0);
otg_loc_conn(fsm, 0);
otg_loc_sof(fsm, 0);
otg_set_protocol(fsm, PROTO_UNDEF);
break;
default:
break;
}
fsm->transceiver->state = new_state;
return 0;
}
static irqreturn_t omap_otg_irq(int irq, void *_isp)
{
u16 otg_irq = omap_readw(OTG_IRQ_SRC);
u32 otg_ctrl;
int ret = IRQ_NONE;
struct isp1301 *isp = _isp;
/* update ISP1301 transciever from OTG controller */
if (otg_irq & OPRT_CHG) {
omap_writew(OPRT_CHG, OTG_IRQ_SRC);
isp1301_defer_work(isp, WORK_UPDATE_ISP);
ret = IRQ_HANDLED;
/* SRP to become b_peripheral failed */
} else if (otg_irq & B_SRP_TMROUT) {
pr_debug("otg: B_SRP_TIMEOUT, %06x\n", omap_readl(OTG_CTRL));
notresponding(isp);
/* gadget drivers that care should monitor all kinds of
* remote wakeup (SRP, normal) using their own timer
* to give "check cable and A-device" messages.
*/
if (isp->otg.state == OTG_STATE_B_SRP_INIT)
b_idle(isp, "srp_timeout");
omap_writew(B_SRP_TMROUT, OTG_IRQ_SRC);
ret = IRQ_HANDLED;
/* HNP to become b_host failed */
} else if (otg_irq & B_HNP_FAIL) {
pr_debug("otg: %s B_HNP_FAIL, %06x\n",
state_name(isp), omap_readl(OTG_CTRL));
notresponding(isp);
otg_ctrl = omap_readl(OTG_CTRL);
otg_ctrl |= OTG_BUSDROP;
otg_ctrl &= OTG_CTRL_MASK & ~OTG_XCEIV_INPUTS;
omap_writel(otg_ctrl, OTG_CTRL);
/* subset of b_peripheral()... */
isp->otg.state = OTG_STATE_B_PERIPHERAL;
pr_debug(" --> b_peripheral\n");
omap_writew(B_HNP_FAIL, OTG_IRQ_SRC);
ret = IRQ_HANDLED;
/* detect SRP from B-device ... */
} else if (otg_irq & A_SRP_DETECT) {
pr_debug("otg: %s SRP_DETECT, %06x\n",
state_name(isp), omap_readl(OTG_CTRL));
isp1301_defer_work(isp, WORK_UPDATE_OTG);
switch (isp->otg.state) {
case OTG_STATE_A_IDLE:
if (!isp->otg.host)
break;
isp1301_defer_work(isp, WORK_HOST_RESUME);
otg_ctrl = omap_readl(OTG_CTRL);
otg_ctrl |= OTG_A_BUSREQ;
otg_ctrl &= ~(OTG_BUSDROP|OTG_B_BUSREQ)
& ~OTG_XCEIV_INPUTS
& OTG_CTRL_MASK;
omap_writel(otg_ctrl, OTG_CTRL);
break;
default:
break;
}
omap_writew(A_SRP_DETECT, OTG_IRQ_SRC);
ret = IRQ_HANDLED;
/* timer expired: T(a_wait_bcon) and maybe T(a_wait_vrise)
* we don't track them separately
*/
} else if (otg_irq & A_REQ_TMROUT) {
otg_ctrl = omap_readl(OTG_CTRL);
pr_info("otg: BCON_TMOUT from %s, %06x\n",
state_name(isp), otg_ctrl);
notresponding(isp);
otg_ctrl |= OTG_BUSDROP;
otg_ctrl &= ~OTG_A_BUSREQ & OTG_CTRL_MASK & ~OTG_XCEIV_INPUTS;
omap_writel(otg_ctrl, OTG_CTRL);
isp->otg.state = OTG_STATE_A_WAIT_VFALL;
omap_writew(A_REQ_TMROUT, OTG_IRQ_SRC);
ret = IRQ_HANDLED;
/* A-supplied voltage fell too low; overcurrent */
} else if (otg_irq & A_VBUS_ERR) {
otg_ctrl = omap_readl(OTG_CTRL);
printk(KERN_ERR "otg: %s, VBUS_ERR %04x ctrl %06x\n",
state_name(isp), otg_irq, otg_ctrl);
otg_ctrl |= OTG_BUSDROP;
otg_ctrl &= ~OTG_A_BUSREQ & OTG_CTRL_MASK & ~OTG_XCEIV_INPUTS;
omap_writel(otg_ctrl, OTG_CTRL);
isp->otg.state = OTG_STATE_A_VBUS_ERR;
omap_writew(A_VBUS_ERR, OTG_IRQ_SRC);
ret = IRQ_HANDLED;
/* switch driver; the transciever code activates it,
* ungating the udc clock or resuming OHCI.
*/
} else if (otg_irq & DRIVER_SWITCH) {
int kick = 0;
otg_ctrl = omap_readl(OTG_CTRL);
printk(KERN_NOTICE "otg: %s, SWITCH to %s, ctrl %06x\n",
state_name(isp),
(otg_ctrl & OTG_DRIVER_SEL)
? "gadget" : "host",
otg_ctrl);
isp1301_defer_work(isp, WORK_UPDATE_ISP);
/* role is peripheral */
if (otg_ctrl & OTG_DRIVER_SEL) {
switch (isp->otg.state) {
case OTG_STATE_A_IDLE:
b_idle(isp, __func__);
break;
default:
break;
}
isp1301_defer_work(isp, WORK_UPDATE_ISP);
/* role is host */
} else {
if (!(otg_ctrl & OTG_ID)) {
otg_ctrl &= OTG_CTRL_MASK & ~OTG_XCEIV_INPUTS;
omap_writel(otg_ctrl | OTG_A_BUSREQ, OTG_CTRL);
}
if (isp->otg.host) {
switch (isp->otg.state) {
case OTG_STATE_B_WAIT_ACON:
isp->otg.state = OTG_STATE_B_HOST;
pr_debug(" --> b_host\n");
kick = 1;
break;
case OTG_STATE_A_WAIT_BCON:
isp->otg.state = OTG_STATE_A_HOST;
pr_debug(" --> a_host\n");
break;
case OTG_STATE_A_PERIPHERAL:
isp->otg.state = OTG_STATE_A_WAIT_BCON;
pr_debug(" --> a_wait_bcon\n");
break;
default:
break;
}
isp1301_defer_work(isp, WORK_HOST_RESUME);
}
}
omap_writew(DRIVER_SWITCH, OTG_IRQ_SRC);
ret = IRQ_HANDLED;
if (kick)
usb_bus_start_enum(isp->otg.host,
isp->otg.host->otg_port);
}
check_state(isp, __func__);
return ret;
}
/* Called when entering a state */
static int otg_set_state(struct otg_fsm *fsm, enum usb_otg_state new_state)
{
state_changed = 1;
if (fsm->otg->phy->state == new_state)
return 0;
VDBG("Set state: %s\n", usb_otg_state_string(new_state));
otg_leave_state(fsm, fsm->otg->phy->state);
switch (new_state) {
case OTG_STATE_B_IDLE:
otg_drv_vbus(fsm, 0);
otg_chrg_vbus(fsm, 0);
otg_loc_conn(fsm, 0);
otg_loc_sof(fsm, 0);
/*
* Driver is responsible for starting ADP probing
* if ADP sensing times out.
*/
otg_start_adp_sns(fsm);
otg_set_protocol(fsm, PROTO_UNDEF);
otg_add_timer(fsm, B_SE0_SRP);
break;
case OTG_STATE_B_SRP_INIT:
otg_start_pulse(fsm);
otg_loc_sof(fsm, 0);
otg_set_protocol(fsm, PROTO_UNDEF);
otg_add_timer(fsm, B_SRP_FAIL);
break;
case OTG_STATE_B_PERIPHERAL:
otg_chrg_vbus(fsm, 0);
otg_loc_sof(fsm, 0);
otg_set_protocol(fsm, PROTO_GADGET);
otg_loc_conn(fsm, 1);
break;
case OTG_STATE_B_WAIT_ACON:
otg_chrg_vbus(fsm, 0);
otg_loc_conn(fsm, 0);
otg_loc_sof(fsm, 0);
otg_set_protocol(fsm, PROTO_HOST);
otg_add_timer(fsm, B_ASE0_BRST);
fsm->a_bus_suspend = 0;
break;
case OTG_STATE_B_HOST:
otg_chrg_vbus(fsm, 0);
otg_loc_conn(fsm, 0);
otg_loc_sof(fsm, 1);
otg_set_protocol(fsm, PROTO_HOST);
usb_bus_start_enum(fsm->otg->host,
fsm->otg->host->otg_port);
break;
case OTG_STATE_A_IDLE:
otg_drv_vbus(fsm, 0);
otg_chrg_vbus(fsm, 0);
otg_loc_conn(fsm, 0);
otg_loc_sof(fsm, 0);
otg_start_adp_prb(fsm);
otg_set_protocol(fsm, PROTO_HOST);
break;
case OTG_STATE_A_WAIT_VRISE:
otg_drv_vbus(fsm, 1);
otg_loc_conn(fsm, 0);
otg_loc_sof(fsm, 0);
otg_set_protocol(fsm, PROTO_HOST);
otg_add_timer(fsm, A_WAIT_VRISE);
break;
case OTG_STATE_A_WAIT_BCON:
otg_drv_vbus(fsm, 1);
otg_loc_conn(fsm, 0);
otg_loc_sof(fsm, 0);
otg_set_protocol(fsm, PROTO_HOST);
otg_add_timer(fsm, A_WAIT_BCON);
break;
case OTG_STATE_A_HOST:
otg_drv_vbus(fsm, 1);
otg_loc_conn(fsm, 0);
otg_loc_sof(fsm, 1);
otg_set_protocol(fsm, PROTO_HOST);
/*
* When HNP is triggered while a_bus_req = 0, a_host will
* suspend too fast to complete a_set_b_hnp_en
*/
if (!fsm->a_bus_req || fsm->a_suspend_req_inf)
otg_add_timer(fsm, A_WAIT_ENUM);
break;
case OTG_STATE_A_SUSPEND:
otg_drv_vbus(fsm, 1);
otg_loc_conn(fsm, 0);
otg_loc_sof(fsm, 0);
otg_set_protocol(fsm, PROTO_HOST);
otg_add_timer(fsm, A_AIDL_BDIS);
break;
case OTG_STATE_A_PERIPHERAL:
otg_loc_sof(fsm, 0);
otg_set_protocol(fsm, PROTO_GADGET);
otg_drv_vbus(fsm, 1);
otg_loc_conn(fsm, 1);
otg_add_timer(fsm, A_BIDL_ADIS);
break;
case OTG_STATE_A_WAIT_VFALL:
otg_drv_vbus(fsm, 0);
otg_loc_conn(fsm, 0);
otg_loc_sof(fsm, 0);
otg_set_protocol(fsm, PROTO_HOST);
otg_add_timer(fsm, A_WAIT_VFALL);
break;
case OTG_STATE_A_VBUS_ERR:
otg_drv_vbus(fsm, 0);
otg_loc_conn(fsm, 0);
otg_loc_sof(fsm, 0);
otg_set_protocol(fsm, PROTO_UNDEF);
break;
default:
break;
}
fsm->otg->phy->state = new_state;
return 0;
}