[adm5120] experimental support for 2.6.27

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@12863 3c298f89-4303-0410-b956-a3cf2f4a3e73

1 files changed, 441 insertions, 0 deletions

diff --git a/target/linux/adm5120/files/drivers/usb/host/adm5120-hub.c b/target/linux/adm5120/files/drivers/usb/host/adm5120-hub.c
new file mode 100644
index 0000000000..6ba62050b1
--- /dev/null
+++ b/target/linux/adm5120/files/drivers/usb/host/adm5120-hub.c
@@ -0,0 +1,441 @@
+/*
+ * ADM5120 HCD (Host Controller Driver) for USB
+ *
+ * Copyright (C) 2007-2008 Gabor Juhos <juhosg@openwrt.org>
+ *
+ * This file was derived from: drivers/usb/host/ohci-hub.c
+ *   (C) Copyright 1999 Roman Weissgaerber <weissg@vienna.at>
+ *   (C) Copyright 2000-2004 David Brownell <dbrownell@users.sourceforge.net>
+ *
+ *  This program is free software; you can redistribute it and/or modify it
+ *  under the terms of the GNU General Public License version 2 as published
+ *  by the Free Software Foundation.
+ *
+ */
+
+/*-------------------------------------------------------------------------*/
+
+/*
+ * ADM5120 Root Hub ... the nonsharable stuff
+ */
+
+#define dbg_port(hc,label,num,value) \
+	admhc_dbg(hc, \
+		"%s port%d " \
+		"= 0x%08x%s%s%s%s%s%s%s%s%s%s%s%s\n", \
+		label, num, value, \
+		(value & ADMHC_PS_PRSC) ? " PRSC" : "", \
+		(value & ADMHC_PS_OCIC) ? " OCIC" : "", \
+		(value & ADMHC_PS_PSSC) ? " PSSC" : "", \
+		(value & ADMHC_PS_PESC) ? " PESC" : "", \
+		(value & ADMHC_PS_CSC) ? " CSC" : "", \
+		\
+		(value & ADMHC_PS_LSDA) ? " LSDA" : "", \
+		(value & ADMHC_PS_PPS) ? " PPS" : "", \
+		(value & ADMHC_PS_PRS) ? " PRS" : "", \
+		(value & ADMHC_PS_POCI) ? " POCI" : "", \
+		(value & ADMHC_PS_PSS) ? " PSS" : "", \
+		\
+		(value & ADMHC_PS_PES) ? " PES" : "", \
+		(value & ADMHC_PS_CCS) ? " CCS" : "" \
+		);
+
+#define dbg_port_write(hc,label,num,value) \
+	admhc_dbg(hc, \
+		"%s port%d " \
+		"= 0x%08x%s%s%s%s%s%s%s%s%s%s%s%s\n", \
+		label, num, value, \
+		(value & ADMHC_PS_PRSC) ? " PRSC" : "", \
+		(value & ADMHC_PS_OCIC) ? " OCIC" : "", \
+		(value & ADMHC_PS_PSSC) ? " PSSC" : "", \
+		(value & ADMHC_PS_PESC) ? " PESC" : "", \
+		(value & ADMHC_PS_CSC) ? " CSC" : "", \
+		\
+		(value & ADMHC_PS_CPP) ? " CPP" : "", \
+		(value & ADMHC_PS_SPP) ? " SPP" : "", \
+		(value & ADMHC_PS_SPR) ? " SPR" : "", \
+		(value & ADMHC_PS_CPS) ? " CPS" : "", \
+		(value & ADMHC_PS_SPS) ? " SPS" : "", \
+		\
+		(value & ADMHC_PS_SPE) ? " SPE" : "", \
+		(value & ADMHC_PS_CPE) ? " CPE" : "" \
+		);
+
+/*-------------------------------------------------------------------------*/
+
+/* hcd->hub_irq_enable() */
+static void admhc_hub_irq_enable(struct usb_hcd *hcd)
+{
+	struct admhcd	*ahcd = hcd_to_admhcd(hcd);
+
+	spin_lock_irq(&ahcd->lock);
+	if (!ahcd->autostop)
+		del_timer(&hcd->rh_timer);	/* Prevent next poll */
+	admhc_intr_enable(ahcd, ADMHC_INTR_INSM);
+	spin_unlock_irq(&ahcd->lock);
+}
+
+/*-------------------------------------------------------------------------*/
+
+/* build "status change" packet (one or two bytes) from HC registers */
+
+static int
+admhc_hub_status_data(struct usb_hcd *hcd, char *buf)
+{
+	struct admhcd	*ahcd = hcd_to_admhcd(hcd);
+	int		i, changed = 0, length = 1;
+	int		any_connected = 0;
+	unsigned long	flags;
+	u32		status;
+
+	spin_lock_irqsave(&ahcd->lock, flags);
+	if (!test_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags))
+		goto done;
+
+	/* init status */
+	status = admhc_read_rhdesc(ahcd);
+	if (status & (ADMHC_RH_LPSC | ADMHC_RH_OCIC))
+		buf [0] = changed = 1;
+	else
+		buf [0] = 0;
+	if (ahcd->num_ports > 7) {
+		buf [1] = 0;
+		length++;
+	}
+
+	/* look at each port */
+	for (i = 0; i < ahcd->num_ports; i++) {
+		status = admhc_read_portstatus(ahcd, i);
+
+		/* can't autostop if ports are connected */
+		any_connected |= (status & ADMHC_PS_CCS);
+
+		if (status & (ADMHC_PS_CSC | ADMHC_PS_PESC | ADMHC_PS_PSSC
+				| ADMHC_PS_OCIC | ADMHC_PS_PRSC)) {
+			changed = 1;
+			if (i < 7)
+			    buf [0] |= 1 << (i + 1);
+			else
+			    buf [1] |= 1 << (i - 7);
+		}
+	}
+
+	hcd->poll_rh = admhc_root_hub_state_changes(ahcd, changed,
+			any_connected);
+
+done:
+	spin_unlock_irqrestore(&ahcd->lock, flags);
+
+	return changed ? length : 0;
+}
+
+/*-------------------------------------------------------------------------*/
+
+static int admhc_get_hub_descriptor(struct admhcd *ahcd, char *buf)
+{
+	struct usb_hub_descriptor *desc = (struct usb_hub_descriptor *)buf;
+	u32 rh = admhc_read_rhdesc(ahcd);
+	u16 temp;
+
+	desc->bDescriptorType = USB_DT_HUB;	/* Hub-descriptor */
+	desc->bPwrOn2PwrGood = ADMHC_POTPGT/2;	/* use default value */
+	desc->bHubContrCurrent = 0x00;		/* 0mA */
+
+	desc->bNbrPorts = ahcd->num_ports;
+	temp = 1 + (ahcd->num_ports / 8);
+	desc->bDescLength = USB_DT_HUB_NONVAR_SIZE + 2 * temp;
+
+	/* FIXME */
+	temp = 0;
+	if (rh & ADMHC_RH_NPS)		/* no power switching? */
+	    temp |= 0x0002;
+	if (rh & ADMHC_RH_PSM)		/* per-port power switching? */
+	    temp |= 0x0001;
+	if (rh & ADMHC_RH_NOCP)		/* no overcurrent reporting? */
+	    temp |= 0x0010;
+	else if (rh & ADMHC_RH_OCPM)	/* per-port overcurrent reporting? */
+	    temp |= 0x0008;
+	desc->wHubCharacteristics = (__force __u16)cpu_to_hc16(ahcd, temp);
+
+	/* two bitmaps:  ports removable, and usb 1.0 legacy PortPwrCtrlMask */
+	desc->bitmap[0] = 0;
+	desc->bitmap[0] = ~0;
+
+	return 0;
+}
+
+static int admhc_get_hub_status(struct admhcd *ahcd, char *buf)
+{
+	struct usb_hub_status *hs = (struct usb_hub_status *)buf;
+	u32 t = admhc_read_rhdesc(ahcd);
+	u16 status, change;
+
+	status = 0;
+	status |= (t & ADMHC_RH_LPS) ? HUB_STATUS_LOCAL_POWER : 0;
+	status |= (t & ADMHC_RH_OCI) ? HUB_STATUS_OVERCURRENT : 0;
+
+	change = 0;
+	change |= (t & ADMHC_RH_LPSC) ? HUB_CHANGE_LOCAL_POWER : 0;
+	change |= (t & ADMHC_RH_OCIC) ? HUB_CHANGE_OVERCURRENT : 0;
+
+	hs->wHubStatus = (__force __u16)cpu_to_hc16(ahcd, status);
+	hs->wHubChange = (__force __u16)cpu_to_hc16(ahcd, change);
+
+	return 0;
+}
+
+static int admhc_get_port_status(struct admhcd *ahcd, unsigned port, char *buf)
+{
+	struct usb_port_status *ps = (struct usb_port_status *)buf;
+	u32 t = admhc_read_portstatus(ahcd, port);
+	u16 status, change;
+
+	status = 0;
+	status |= (t & ADMHC_PS_CCS) ? USB_PORT_STAT_CONNECTION : 0;
+	status |= (t & ADMHC_PS_PES) ? USB_PORT_STAT_ENABLE : 0;
+	status |= (t & ADMHC_PS_PSS) ? USB_PORT_STAT_SUSPEND : 0;
+	status |= (t & ADMHC_PS_POCI) ? USB_PORT_STAT_OVERCURRENT : 0;
+	status |= (t & ADMHC_PS_PRS) ? USB_PORT_STAT_RESET : 0;
+	status |= (t & ADMHC_PS_PPS) ? USB_PORT_STAT_POWER : 0;
+	status |= (t & ADMHC_PS_LSDA) ? USB_PORT_STAT_LOW_SPEED : 0;
+
+	change = 0;
+	change |= (t & ADMHC_PS_CSC) ? USB_PORT_STAT_C_CONNECTION : 0;
+	change |= (t & ADMHC_PS_PESC) ? USB_PORT_STAT_C_ENABLE : 0;
+	change |= (t & ADMHC_PS_PSSC) ? USB_PORT_STAT_C_SUSPEND : 0;
+	change |= (t & ADMHC_PS_OCIC) ? USB_PORT_STAT_C_OVERCURRENT : 0;
+	change |= (t & ADMHC_PS_PRSC) ? USB_PORT_STAT_C_RESET : 0;
+
+	ps->wPortStatus = (__force __u16)cpu_to_hc16(ahcd, status);
+	ps->wPortChange = (__force __u16)cpu_to_hc16(ahcd, change);
+
+	return 0;
+}
+
+/*-------------------------------------------------------------------------*/
+
+#ifdef	CONFIG_USB_OTG
+
+static int admhc_start_port_reset(struct usb_hcd *hcd, unsigned port)
+{
+	struct admhcd	*ahcd = hcd_to_admhcd(hcd);
+	u32			status;
+
+	if (!port)
+		return -EINVAL;
+	port--;
+
+	/* start port reset before HNP protocol times out */
+	status = admhc_read_portstatus(ahcd, port);
+	if (!(status & ADMHC_PS_CCS))
+		return -ENODEV;
+
+	/* khubd will finish the reset later */
+	admhc_write_portstatus(ahcd, port, ADMHC_PS_PRS);
+	return 0;
+}
+
+static void start_hnp(struct admhcd *ahcd);
+
+#else
+
+#define	admhc_start_port_reset		NULL
+
+#endif
+
+/*-------------------------------------------------------------------------*/
+
+
+/* See usb 7.1.7.5:  root hubs must issue at least 50 msec reset signaling,
+ * not necessarily continuous ... to guard against resume signaling.
+ * The short timeout is safe for non-root hubs, and is backward-compatible
+ * with earlier Linux hosts.
+ */
+#ifdef	CONFIG_USB_SUSPEND
+#define	PORT_RESET_MSEC		50
+#else
+#define	PORT_RESET_MSEC		10
+#endif
+
+/* this timer value might be vendor-specific ... */
+#define	PORT_RESET_HW_MSEC	10
+
+/* wrap-aware logic morphed from <linux/jiffies.h> */
+#define tick_before(t1,t2) ((s16)(((s16)(t1))-((s16)(t2))) < 0)
+
+/* called from some task, normally khubd */
+static inline int admhc_port_reset(struct admhcd *ahcd, unsigned port)
+{
+	u32 t;
+
+	admhc_vdbg(ahcd, "reset port%d\n", port);
+	t = admhc_read_portstatus(ahcd, port);
+	if (!(t & ADMHC_PS_CCS))
+		return -ENODEV;
+
+	admhc_write_portstatus(ahcd, port, ADMHC_PS_SPR);
+	mdelay(10);
+	admhc_write_portstatus(ahcd, port, (ADMHC_PS_SPE | ADMHC_PS_CSC));
+	mdelay(100);
+
+	return 0;
+}
+
+static inline int admhc_port_enable(struct admhcd *ahcd, unsigned port)
+{
+	u32 t;
+
+	admhc_vdbg(ahcd, "enable port%d\n", port);
+	t = admhc_read_portstatus(ahcd, port);
+	if (!(t & ADMHC_PS_CCS))
+		return -ENODEV;
+
+	admhc_write_portstatus(ahcd, port, ADMHC_PS_SPE);
+
+	return 0;
+}
+
+static inline int admhc_port_disable(struct admhcd *ahcd, unsigned port)
+{
+	u32 t;
+
+	admhc_vdbg(ahcd, "disable port%d\n", port);
+	t = admhc_read_portstatus(ahcd, port);
+	if (!(t & ADMHC_PS_CCS))
+		return -ENODEV;
+
+	admhc_write_portstatus(ahcd, port, ADMHC_PS_CPE);
+
+	return 0;
+}
+
+static inline int admhc_port_write(struct admhcd *ahcd, unsigned port,
+		u32 val)
+{
+#ifdef ADMHC_VERBOSE_DEBUG
+	dbg_port_write(ahcd, "write", port, val);
+#endif
+	admhc_write_portstatus(ahcd, port, val);
+
+	return 0;
+}
+
+static int admhc_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue,
+		u16 wIndex, char *buf, u16 wLength)
+{
+	struct admhcd	*ahcd = hcd_to_admhcd(hcd);
+	int		ports = hcd_to_bus(hcd)->root_hub->maxchild;
+	int		ret = 0;
+
+	if (unlikely(!test_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags)))
+		return -ESHUTDOWN;
+
+	switch (typeReq) {
+	case ClearHubFeature:
+		switch (wValue) {
+		case C_HUB_OVER_CURRENT:
+#if 0			/* FIXME */
+			admhc_writel(ahcd, ADMHC_RH_OCIC,
+					&ahcd->regs->roothub.status);
+#endif
+		case C_HUB_LOCAL_POWER:
+			break;
+		default:
+			goto error;
+		}
+		break;
+	case ClearPortFeature:
+		if (!wIndex || wIndex > ports)
+			goto error;
+		wIndex--;
+
+		switch (wValue) {
+		case USB_PORT_FEAT_ENABLE:
+			ret = admhc_port_disable(ahcd, wIndex);
+			break;
+		case USB_PORT_FEAT_SUSPEND:
+			ret = admhc_port_write(ahcd, wIndex, ADMHC_PS_CPS);
+			break;
+		case USB_PORT_FEAT_POWER:
+			ret = admhc_port_write(ahcd, wIndex, ADMHC_PS_CPP);
+			break;
+		case USB_PORT_FEAT_C_CONNECTION:
+			ret = admhc_port_write(ahcd, wIndex, ADMHC_PS_CSC);
+			break;
+		case USB_PORT_FEAT_C_ENABLE:
+			ret = admhc_port_write(ahcd, wIndex, ADMHC_PS_PESC);
+			break;
+		case USB_PORT_FEAT_C_SUSPEND:
+			ret = admhc_port_write(ahcd, wIndex, ADMHC_PS_PSSC);
+			break;
+		case USB_PORT_FEAT_C_OVER_CURRENT:
+			ret = admhc_port_write(ahcd, wIndex, ADMHC_PS_OCIC);
+			break;
+		case USB_PORT_FEAT_C_RESET:
+			ret = admhc_port_write(ahcd, wIndex, ADMHC_PS_PRSC);
+			break;
+		default:
+			goto error;
+		}
+		break;
+	case GetHubDescriptor:
+		ret = admhc_get_hub_descriptor(ahcd, buf);
+		break;
+	case GetHubStatus:
+		ret = admhc_get_hub_status(ahcd, buf);
+		break;
+	case GetPortStatus:
+		if (!wIndex || wIndex > ports)
+			goto error;
+		wIndex--;
+
+		ret = admhc_get_port_status(ahcd, wIndex, buf);
+		break;
+	case SetHubFeature:
+		switch (wValue) {
+		case C_HUB_OVER_CURRENT:
+			/* FIXME:  this can be cleared, yes? */
+		case C_HUB_LOCAL_POWER:
+			break;
+		default:
+			goto error;
+		}
+		break;
+	case SetPortFeature:
+		if (!wIndex || wIndex > ports)
+			goto error;
+		wIndex--;
+
+		switch (wValue) {
+		case USB_PORT_FEAT_ENABLE:
+			ret = admhc_port_enable(ahcd, wIndex);
+			break;
+		case USB_PORT_FEAT_RESET:
+			ret = admhc_port_reset(ahcd, wIndex);
+			break;
+		case USB_PORT_FEAT_SUSPEND:
+#ifdef	CONFIG_USB_OTG
+			if (hcd->self.otg_port == (wIndex + 1)
+					&& hcd->self.b_hnp_enable)
+				start_hnp(ahcd);
+			else
+#endif
+			ret = admhc_port_write(ahcd, wIndex, ADMHC_PS_SPS);
+			break;
+		case USB_PORT_FEAT_POWER:
+			ret = admhc_port_write(ahcd, wIndex, ADMHC_PS_SPP);
+			break;
+		default:
+			goto error;
+		}
+		break;
+
+	default:
+error:
+		/* "protocol stall" on error */
+		ret = -EPIPE;
+	}
+
+	return ret;
+}
+