Preliminary ADM5120 support, marked as broken

SVN-Revision: 6614

1 files changed, 790 insertions, 0 deletions

diff --git a/target/linux/adm5120-2.6/files/drivers/usb/host/adm5120-hcd.c b/target/linux/adm5120-2.6/files/drivers/usb/host/adm5120-hcd.c
new file mode 100644
index 0000000..b4a1899
--- /dev/null
+++ b/target/linux/adm5120-2.6/files/drivers/usb/host/adm5120-hcd.c
@@ -0,0 +1,790 @@
+/*
+ *	HCD driver for ADM5120 SoC
+ *
+ *	Copyright (C) 2005 Jeroen Vreeken (pe1rxq@amsat.org)
+ *
+ *	Based on the ADMtek 2.4 driver 
+ *	(C) Copyright 2003 Junius Chen <juniusc@admtek.com.tw>
+ *	Which again was based on the ohci and uhci drivers.
+ */
+
+#include <linux/autoconf.h>
+#include <linux/moduleparam.h>
+#include <linux/kernel.h>
+#include <linux/errno.h>
+#include <linux/interrupt.h>
+#include <linux/usb.h>
+#include <linux/platform_device.h>
+
+#include "../core/hcd.h"
+
+MODULE_DESCRIPTION("ADM5120 USB Host Controller Driver");
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Jeroen Vreeken (pe1rxq@amsat.org)");
+
+#define ADMHCD_REG_CONTROL		0x00
+#define ADMHCD_REG_INTSTATUS		0x04
+#define ADMHCD_REG_INTENABLE		0x08
+#define ADMHCD_REG_HOSTCONTROL		0x10
+#define ADMHCD_REG_FMINTERVAL		0x18
+#define ADMHCD_REG_FMNUMBER		0x1c
+#define ADMHCD_REG_LSTHRESH		0x70
+#define ADMHCD_REG_RHDESCR		0x74
+#define ADMHCD_REG_PORTSTATUS0		0x78
+#define ADMHCD_REG_PORTSTATUS1		0x7c
+#define ADMHCD_REG_HOSTHEAD		0x80
+
+
+#define ADMHCD_NUMPORTS		2
+
+#define ADMHCD_HOST_EN		0x00000001	/* Host enable */
+#define ADMHCD_SW_INTREQ	0x00000002	/* request software int */
+#define ADMHCD_SW_RESET		0x00000008	/* Reset */
+
+#define ADMHCD_INT_TD		0x00100000	/* TD completed */
+#define ADMHCD_INT_SW		0x20000000	/* software interrupt */
+#define ADMHCD_INT_FATAL	0x40000000	/* Fatal interrupt */
+#define ADMHCD_INT_ACT		0x80000000	/* Interrupt active */
+
+#define ADMHCD_STATE_RST	0x00000000	/* bus state reset */
+#define ADMHCD_STATE_RES	0x00000001	/* bus state resume */
+#define ADMHCD_STATE_OP		0x00000002	/* bus state operational */
+#define ADMHCD_STATE_SUS	0x00000003	/* bus state suspended */
+#define ADMHCD_DMA_EN		0x00000004	/* enable dma engine */
+
+#define ADMHCD_NPS		0x00000020	/* No Power Switch */
+#define ADMHCD_LPSC		0x04000000	/* Local power switch change */
+
+#define ADMHCD_CCS		0x00000001	/* current connect status */
+#define ADMHCD_PES		0x00000002	/* port enable status */
+#define ADMHCD_PSS		0x00000004	/* port suspend status */
+#define ADMHCD_POCI		0x00000008	/* port overcurrent indicator */
+#define ADMHCD_PRS		0x00000010	/* port reset status */
+#define ADMHCD_PPS		0x00000100	/* port power status */
+#define ADMHCD_LSDA		0x00000200	/* low speed device attached */
+#define ADMHCD_CSC		0x00010000	/* connect status change */
+#define ADMHCD_PESC		0x00020000	/* enable status change */
+#define ADMHCD_PSSC		0x00040000	/* suspend status change */
+#define ADMHCD_OCIC		0x00080000	/* overcurrent change*/
+#define ADMHCD_PRSC		0x00100000	/* reset status change */
+
+
+struct admhcd_ed {
+	/* Don't change first four, they used for DMA */
+	u32				control;
+	struct admhcd_td		*tail;
+	struct admhcd_td		*head;
+	struct admhcd_ed		*next;
+	/* the rest is for the driver only: */
+	struct admhcd_td		*cur;
+	struct usb_host_endpoint 	*ep;
+	struct urb			*urb;
+	struct admhcd_ed		*real;
+} __attribute__ ((packed));
+
+#define ADMHCD_ED_EPSHIFT	7		/* Shift for endpoint number */
+#define ADMHCD_ED_INT		0x00000800	/* Is this an int endpoint */
+#define ADMHCD_ED_SPEED		0x00002000	/* Is it a high speed dev? */
+#define ADMHCD_ED_SKIP		0x00004000	/* Skip this ED */
+#define ADMHCD_ED_FORMAT	0x00008000	/* Is this an isoc endpoint */
+#define ADMHCD_ED_MAXSHIFT	16		/* Shift for max packet size */
+
+struct admhcd_td {
+	/* Don't change first four, they are used for DMA */
+	u32			control;
+	u32			buffer;
+	u32			buflen;
+	struct admhcd_td	*next;
+	/* the rest is for the driver only: */
+	struct urb		*urb;
+	struct admhcd_td	*real;
+} __attribute__ ((packed));
+
+#define ADMHCD_TD_OWN		0x80000000
+#define ADMHCD_TD_TOGGLE	0x00000000
+#define ADMHCD_TD_DATA0		0x01000000
+#define ADMHCD_TD_DATA1		0x01800000
+#define ADMHCD_TD_OUT		0x00200000
+#define ADMHCD_TD_IN		0x00400000
+#define ADMHCD_TD_SETUP		0x00000000
+#define ADMHCD_TD_ISO		0x00010000
+#define ADMHCD_TD_R		0x00040000
+#define ADMHCD_TD_INTEN		0x00010000
+
+static int admhcd_td_err[16] = {
+	0,		/* No */
+	-EREMOTEIO,		/* CRC */
+	-EREMOTEIO,	/* bit stuff */
+	-EREMOTEIO,		/* data toggle */
+	-EPIPE,		/* stall */
+	-ETIMEDOUT,	/* timeout */
+	-EPROTO,	/* pid err */
+	-EPROTO,	/* unexpected pid */
+	-EREMOTEIO,	/* data overrun */
+	-EREMOTEIO,	/* data underrun */
+	-ETIMEDOUT,	/* 1010 */
+	-ETIMEDOUT,	/* 1011 */
+	-EREMOTEIO,	/* buffer overrun */
+	-EREMOTEIO,	/* buffer underrun */
+	-ETIMEDOUT,	/* 1110 */
+	-ETIMEDOUT,	/* 1111 */
+};
+
+#define ADMHCD_TD_ERRMASK	0x38000000
+#define ADMHCD_TD_ERRSHIFT	27
+
+#define TD(td)	((struct admhcd_td *)(((u32)(td)) & ~0xf))
+#define ED(ed)	((struct admhcd_ed *)(((u32)(ed)) & ~0xf))
+
+struct admhcd {
+	u32		base;
+	u32		dma_en;
+	spinlock_t	lock;
+	unsigned long	flags;
+};
+
+#define hcd_to_admhcd(hcd) ((struct admhcd *)(hcd)->hcd_priv)
+
+static char hcd_name[] = "adm5120-hcd";
+
+static u32 admhcd_reg_get(struct admhcd *ahcd, int reg)
+{
+	return *(volatile u32 *)KSEG1ADDR(ahcd->base+reg);
+}
+
+static void admhcd_reg_set(struct admhcd *ahcd, int reg, u32 val)
+{
+	*(volatile u32 *)KSEG1ADDR(ahcd->base+reg) = val;
+}
+
+static void admhcd_lock(struct admhcd *ahcd)
+{
+	spin_lock_irqsave(&ahcd->lock, ahcd->flags);
+	ahcd->dma_en = admhcd_reg_get(ahcd, ADMHCD_REG_HOSTCONTROL) &
+	    ADMHCD_DMA_EN;
+	admhcd_reg_set(ahcd, ADMHCD_REG_HOSTCONTROL, ADMHCD_STATE_OP);
+}
+
+static void admhcd_unlock(struct admhcd *ahcd)
+{
+	admhcd_reg_set(ahcd, ADMHCD_REG_HOSTCONTROL,
+	    ADMHCD_STATE_OP | ahcd->dma_en);
+	spin_unlock_irqrestore(&ahcd->lock, ahcd->flags);
+}
+
+static struct admhcd_td *admhcd_td_alloc(struct admhcd_ed *ed, struct urb *urb)
+{
+	struct admhcd_td *tdn, *td;
+
+	tdn = kmalloc(sizeof(struct admhcd_td), GFP_ATOMIC);
+	if (!tdn)
+		return NULL;
+	tdn->real = tdn;
+	tdn = (struct admhcd_td *)KSEG1ADDR(tdn);
+	memset(tdn, 0, sizeof(struct admhcd_td));
+	if (ed->cur == NULL) {
+		ed->cur = tdn;
+		ed->head = tdn;
+		ed->tail = tdn;	
+		td = tdn;
+	} else {
+		/* Supply back the old tail and link in new td as tail */
+		td = TD(ed->tail);
+		TD(ed->tail)->next = tdn;
+		ed->tail = tdn;
+	}
+	td->urb = urb;
+
+	return td;
+}
+
+static void admhcd_td_free(struct admhcd_ed *ed, struct urb *urb)
+{
+	struct admhcd_td *td, **tdp;
+
+	if (urb == NULL)
+		ed->control |= ADMHCD_ED_SKIP;
+	tdp = &ed->cur;
+	td = ed->cur;
+	do {
+		if (td->urb == urb)
+			break;
+		tdp = &td->next;
+		td = TD(td->next);
+	} while (td);
+	while (td && td->urb == urb) {
+		*tdp = TD(td->next);
+		kfree(td->real);
+		td = *tdp;
+	}
+}
+
+/* Find an endpoint's descriptor, if needed allocate a new one and link it
+   in the DMA chain
+ */
+static struct admhcd_ed *admhcd_get_ed(struct admhcd *ahcd,
+    struct usb_host_endpoint *ep, struct urb *urb)
+{
+	struct admhcd_ed *hosthead;
+	struct admhcd_ed *found = NULL, *ed = NULL;
+	unsigned int pipe = urb->pipe;
+
+	admhcd_lock(ahcd);
+	hosthead = (struct admhcd_ed *)admhcd_reg_get(ahcd, ADMHCD_REG_HOSTHEAD);
+	if (hosthead) {
+		for (ed = hosthead;; ed = ED(ed->next)) {
+			if (ed->ep == ep) {
+				found = ed;
+				break;
+			}
+			if (ED(ed->next) == hosthead)
+				break;
+		}
+	}
+	if (!found) {
+		found = kmalloc(sizeof(struct admhcd_ed), GFP_ATOMIC);
+		if (!found)
+			goto out;
+		memset(found, 0, sizeof(struct admhcd_ed));
+		found->real = found;
+		found->ep = ep;
+		found = (struct admhcd_ed *)KSEG1ADDR(found);
+		found->control = usb_pipedevice(pipe) |
+		    (usb_pipeendpoint(pipe) << ADMHCD_ED_EPSHIFT) |
+		    (usb_pipeint(pipe) ? ADMHCD_ED_INT : 0) |
+		    (urb->dev->speed == USB_SPEED_FULL ? ADMHCD_ED_SPEED : 0) |
+		    (usb_pipeisoc(pipe) ? ADMHCD_ED_FORMAT : 0) |
+		    (usb_maxpacket(urb->dev, pipe, usb_pipeout(pipe)) << ADMHCD_ED_MAXSHIFT);
+		/* Alloc first dummy td */
+		admhcd_td_alloc(found, NULL);
+		if (hosthead) {
+			found->next = hosthead;
+			ed->next = found;
+		} else {
+			found->next = found;
+			admhcd_reg_set(ahcd, ADMHCD_REG_HOSTHEAD, (u32)found);
+		}
+	}
+out:
+	admhcd_unlock(ahcd);
+	return found;
+}
+
+static struct admhcd_td *admhcd_td_fill(u32 control, struct admhcd_td *td,
+    dma_addr_t data, int len)
+{
+	td->buffer = data;
+	td->buflen = len;
+	td->control = control;
+	return TD(td->next);
+}
+
+static void admhcd_ed_start(struct admhcd *ahcd, struct admhcd_ed *ed)
+{
+	struct admhcd_td *td = ed->cur;
+
+	if (ed->urb)
+		return;
+	if (td->urb) {
+		ed->urb = td->urb;
+		while (1) {
+			td->control |= ADMHCD_TD_OWN;
+			if (TD(td->next)->urb != td->urb) {
+				td->buflen |= ADMHCD_TD_INTEN;
+				break;
+			}
+			td = TD(td->next);
+		}
+	}
+	ed->head = TD(ed->head);
+	ahcd->dma_en |= ADMHCD_DMA_EN;
+}
+
+static irqreturn_t adm5120hcd_irq(int irq, void *ptr, struct pt_regs *regs)
+{
+	struct usb_hcd *hcd = (struct usb_hcd *)ptr;
+	struct admhcd *ahcd = hcd_to_admhcd(hcd);
+	u32 intstatus;
+
+	intstatus = admhcd_reg_get(ahcd, ADMHCD_REG_INTSTATUS);
+	if (intstatus & ADMHCD_INT_FATAL) {
+		admhcd_reg_set(ahcd, ADMHCD_REG_INTSTATUS, ADMHCD_INT_FATAL);
+		//
+	}
+	if (intstatus & ADMHCD_INT_SW) {
+		admhcd_reg_set(ahcd, ADMHCD_REG_INTSTATUS, ADMHCD_INT_SW);
+		//
+	}
+	if (intstatus & ADMHCD_INT_TD) {
+		struct admhcd_ed *ed, *head;
+		
+		admhcd_reg_set(ahcd, ADMHCD_REG_INTSTATUS, ADMHCD_INT_TD);
+
+		head = (struct admhcd_ed *)admhcd_reg_get(ahcd, ADMHCD_REG_HOSTHEAD);
+		ed = head;
+		if (ed) do {
+			/* Is it a finished TD? */
+			if (ed->urb && !(ed->cur->control & ADMHCD_TD_OWN)) {
+				struct admhcd_td *td;
+				int error;
+				
+				td = ed->cur;
+				error = (td->control & ADMHCD_TD_ERRMASK) >>
+				    ADMHCD_TD_ERRSHIFT;
+				ed->urb->status = admhcd_td_err[error];
+				admhcd_td_free(ed, ed->urb);
+				// Calculate real length!!!
+				ed->urb->actual_length = ed->urb->transfer_buffer_length;
+				ed->urb->hcpriv = NULL;
+				usb_hcd_giveback_urb(hcd, ed->urb);
+				ed->urb = NULL;
+			}
+			admhcd_ed_start(ahcd, ed);
+			ed = ED(ed->next);
+		} while (ed != head);
+	}
+
+	return IRQ_HANDLED;
+}
+
+static int admhcd_urb_enqueue(struct usb_hcd *hcd, struct usb_host_endpoint *ep,
+    struct urb *urb, int mem_flags)
+{
+	struct admhcd *ahcd = hcd_to_admhcd(hcd);
+	struct admhcd_ed *ed;
+	struct admhcd_td *td;
+	int size = 0, i, zero = 0, ret = 0;
+	unsigned int pipe = urb->pipe, toggle = 0;
+	dma_addr_t data = (dma_addr_t)urb->transfer_buffer;
+	int data_len = urb->transfer_buffer_length;
+
+	ed = admhcd_get_ed(ahcd, ep, urb);
+	if (!ed)
+		return -ENOMEM;
+
+	switch(usb_pipetype(pipe)) {
+		case PIPE_CONTROL:
+			size = 2;
+		case PIPE_INTERRUPT:
+		case PIPE_BULK:
+		default:
+			size += urb->transfer_buffer_length / 4096;
+			if (urb->transfer_buffer_length % 4096)
+				size++;
+			if (size == 0)
+				size++;
+			else if (urb->transfer_flags & URB_ZERO_PACKET &&
+			    !(urb->transfer_buffer_length %
+			      usb_maxpacket(urb->dev, pipe, usb_pipeout(pipe)))) {
+				size++;
+				zero = 1;
+			}
+			break;
+		case PIPE_ISOCHRONOUS:
+			size = urb->number_of_packets;
+			break;
+	}
+
+	admhcd_lock(ahcd);
+	/* Remember the first td */
+	td = admhcd_td_alloc(ed, urb);
+	if (!td) {
+		ret = -ENOMEM;
+		goto out;
+	}
+	/* Allocate additionall tds first */
+	for (i = 1; i < size; i++) {
+		if (admhcd_td_alloc(ed, urb) == NULL) {
+			admhcd_td_free(ed, urb);
+			ret = -ENOMEM;
+			goto out;
+		}
+	}
+
+	if (usb_gettoggle(urb->dev, usb_pipeendpoint(pipe), usb_pipeout(pipe)))
+		toggle = ADMHCD_TD_TOGGLE;
+	else {
+		toggle = ADMHCD_TD_DATA0;
+		usb_settoggle(urb->dev, usb_pipeendpoint(pipe),
+		    usb_pipeout(pipe), 1);
+	}
+
+	switch(usb_pipetype(pipe)) {
+		case PIPE_CONTROL:
+			td = admhcd_td_fill(ADMHCD_TD_SETUP | ADMHCD_TD_DATA0,
+			    td, (dma_addr_t)urb->setup_packet, 8);
+			while (data_len > 0) {
+				td = admhcd_td_fill(ADMHCD_TD_DATA1 
+				    | ADMHCD_TD_R |
+				    (usb_pipeout(pipe) ?
+				    ADMHCD_TD_OUT : ADMHCD_TD_IN), td,
+				    data, data_len % 4097);
+				data_len -= 4096;
+			}
+			admhcd_td_fill(ADMHCD_TD_DATA1 | (usb_pipeout(pipe) ?
+			    ADMHCD_TD_IN : ADMHCD_TD_OUT), td,
+			    data, 0);
+			break;
+		case PIPE_INTERRUPT:
+		case PIPE_BULK:
+			//info ok for interrupt?
+			i = 0;
+			while(data_len > 4096) {
+				td = admhcd_td_fill((usb_pipeout(pipe) ?
+				    ADMHCD_TD_OUT : 
+				    ADMHCD_TD_IN | ADMHCD_TD_R) |
+				    (i ? ADMHCD_TD_TOGGLE : toggle), td,
+				    data, 4096);
+				data += 4096;
+				data_len -= 4096;
+				i++;
+			}
+			td = admhcd_td_fill((usb_pipeout(pipe) ? 
+			    ADMHCD_TD_OUT : ADMHCD_TD_IN) |
+			    (i ? ADMHCD_TD_TOGGLE : toggle), td, data, data_len);
+			i++;
+			if (zero)
+				admhcd_td_fill((usb_pipeout(pipe) ?
+				    ADMHCD_TD_OUT : ADMHCD_TD_IN) |
+				    (i ? ADMHCD_TD_TOGGLE : toggle), td, 0, 0);
+			break;
+		case PIPE_ISOCHRONOUS:
+			for (i = 0; i < urb->number_of_packets; i++) {
+				td = admhcd_td_fill(ADMHCD_TD_ISO |
+				    ((urb->start_frame + i) & 0xffff), td,
+				    data + urb->iso_frame_desc[i].offset,
+				    urb->iso_frame_desc[i].length);
+			}
+			break;
+	}
+	urb->hcpriv = ed;
+	admhcd_ed_start(ahcd, ed);
+out:
+	admhcd_unlock(ahcd);
+	return ret;
+}
+
+static int admhcd_urb_dequeue(struct usb_hcd *hcd, struct urb *urb)
+{
+	struct admhcd *ahcd = hcd_to_admhcd(hcd);
+	struct admhcd_ed *ed;
+
+	admhcd_lock(ahcd);
+
+	ed = urb->hcpriv;
+	if (ed && ed->urb != urb)
+		admhcd_td_free(ed, urb);
+
+	admhcd_unlock(ahcd);
+	return 0;
+}
+
+static void admhcd_endpoint_disable(struct usb_hcd *hcd, struct usb_host_endpoint *ep)
+{
+	struct admhcd *ahcd = hcd_to_admhcd(hcd);
+	struct admhcd_ed *ed, *edt, *head;
+
+	admhcd_lock(ahcd);
+
+	head = (struct admhcd_ed *)admhcd_reg_get(ahcd, ADMHCD_REG_HOSTHEAD);
+	if (!head)
+		goto out;
+	for (ed = head; ED(ed->next) != head; ed = ED(ed->next))
+		if (ed->ep == ep)
+			break;
+	if (ed->ep != ep)
+		goto out;
+	while (ed->cur)
+		admhcd_td_free(ed, ed->cur->urb);
+	if (head == ed) {
+		if (ED(ed->next) == ed) {
+			admhcd_reg_set(ahcd, ADMHCD_REG_HOSTHEAD, 0);
+			ahcd->dma_en = 0;
+			goto out_free;
+		}
+		head = ED(ed->next);
+		for (edt = head; ED(edt->next) != head; edt = ED(edt->next));
+		edt->next = ED(ed->next);
+		admhcd_reg_set(ahcd, ADMHCD_REG_HOSTHEAD, (u32)ed->next);
+		goto out_free;
+	}
+	for (edt = head; edt->next != ed; edt = edt->next);
+	edt->next = ed->next;
+out_free:
+	kfree(ed->real);
+out:
+	admhcd_unlock(ahcd);
+}
+
+static int admhcd_get_frame_number(struct usb_hcd *hcd)
+{
+	struct admhcd *ahcd = hcd_to_admhcd(hcd);
+
+	return admhcd_reg_get(ahcd, ADMHCD_REG_FMNUMBER) & 0x0000ffff;
+}
+
+static int admhcd_hub_status_data(struct usb_hcd *hcd, char *buf)
+{
+	struct admhcd *ahcd = hcd_to_admhcd(hcd);
+	int port;
+
+	*buf = 0;
+	for (port = 0; port < ADMHCD_NUMPORTS; port++) {
+		if (admhcd_reg_get(ahcd, ADMHCD_REG_PORTSTATUS0 + port*4) &
+		    (ADMHCD_CSC | ADMHCD_PESC | ADMHCD_PSSC | ADMHCD_OCIC |
+		     ADMHCD_PRSC))
+			*buf |= (1 << (port + 1));
+	}
+	return !!*buf;
+}
+
+static __u8 root_hub_hub_des[] = {
+	0x09,		/* __u8  bLength; */
+	0x29,		/* __u8  bDescriptorType; Hub-descriptor */
+	0x02,		/* __u8  bNbrPorts; */
+	0x0a, 0x00,	/* __u16 wHubCharacteristics; */
+	0x01,		/* __u8  bPwrOn2pwrGood; 2ms */
+	0x00,		/* __u8  bHubContrCurrent; 0mA */
+	0x00,		/* __u8  DeviceRemovable; */
+	0xff,		/* __u8  PortPwrCtrlMask; */
+};
+
+static int admhcd_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue,
+    u16 wIndex, char *buf, u16 wLength)
+{
+	struct admhcd *ahcd = hcd_to_admhcd(hcd);
+	int retval = 0, len;
+	unsigned int port = wIndex -1;
+
+	switch (typeReq) {
+
+	case GetHubStatus:
+		*(__le32 *)buf = cpu_to_le32(0);
+		break;
+	case GetPortStatus:
+		if (port >= ADMHCD_NUMPORTS)
+			goto err;
+		*(__le32 *)buf = cpu_to_le32(
+		    admhcd_reg_get(ahcd, ADMHCD_REG_PORTSTATUS0 + port*4));
+		break;
+	case SetHubFeature:		/* We don't implement these */
+	case ClearHubFeature:
+		switch (wValue) {
+		case C_HUB_OVER_CURRENT:
+		case C_HUB_LOCAL_POWER:
+			break;
+		default:
+			goto err;
+		}
+	case SetPortFeature:
+		if (port >= ADMHCD_NUMPORTS)
+			goto err;
+
+		switch (wValue) {
+		case USB_PORT_FEAT_SUSPEND:
+			admhcd_reg_set(ahcd, ADMHCD_REG_PORTSTATUS0 + port*4,
+			    ADMHCD_PSS);
+			break;
+		case USB_PORT_FEAT_RESET:
+			if (admhcd_reg_get(ahcd, ADMHCD_REG_PORTSTATUS0 + port*4)
+			    & ADMHCD_CCS) {
+				admhcd_reg_set(ahcd, 
+				    ADMHCD_REG_PORTSTATUS0 + port*4,
+				    ADMHCD_PRS | ADMHCD_CSC);
+				mdelay(50);
+				admhcd_reg_set(ahcd,
+				    ADMHCD_REG_PORTSTATUS0 + port*4,
+				    ADMHCD_PES | ADMHCD_CSC);
+			}
+			break;
+		case USB_PORT_FEAT_POWER:
+			admhcd_reg_set(ahcd, ADMHCD_REG_PORTSTATUS0 + port*4,
+			    ADMHCD_PPS);
+			break;
+		default:
+			goto err;
+		}
+		break;
+	case ClearPortFeature:
+		if (port >= ADMHCD_NUMPORTS)
+			goto err;
+
+		switch (wValue) {
+		case USB_PORT_FEAT_ENABLE:
+			admhcd_reg_set(ahcd, ADMHCD_REG_PORTSTATUS0 + port*4,
+			    ADMHCD_CCS);
+			break;
+		case USB_PORT_FEAT_C_ENABLE:
+			admhcd_reg_set(ahcd, ADMHCD_REG_PORTSTATUS0 + port*4,
+			    ADMHCD_PESC);
+			break;
+		case USB_PORT_FEAT_SUSPEND:
+			admhcd_reg_set(ahcd, ADMHCD_REG_PORTSTATUS0 + port*4,
+			    ADMHCD_POCI);
+			break;
+		case USB_PORT_FEAT_C_SUSPEND:
+			admhcd_reg_set(ahcd, ADMHCD_REG_PORTSTATUS0 + port*4,
+			    ADMHCD_PSSC);
+		case USB_PORT_FEAT_POWER:
+			admhcd_reg_set(ahcd, ADMHCD_REG_PORTSTATUS0 + port*4,
+			    ADMHCD_LSDA);
+			break;
+		case USB_PORT_FEAT_C_CONNECTION:
+			admhcd_reg_set(ahcd, ADMHCD_REG_PORTSTATUS0 + port*4,
+			    ADMHCD_CSC);
+			break;
+		case USB_PORT_FEAT_C_OVER_CURRENT:
+			admhcd_reg_set(ahcd, ADMHCD_REG_PORTSTATUS0 + port*4,
+			    ADMHCD_OCIC);
+			break;
+		case USB_PORT_FEAT_C_RESET:
+			admhcd_reg_set(ahcd, ADMHCD_REG_PORTSTATUS0 + port*4,
+			    ADMHCD_PRSC);
+			break;
+		default:
+			goto err;
+		}
+		break;
+	case GetHubDescriptor:
+		len = min_t(unsigned int, sizeof(root_hub_hub_des), wLength);
+		memcpy(buf, root_hub_hub_des, len);
+		break;
+	default:
+err:
+		retval = -EPIPE;
+	}
+
+	return retval;
+}
+
+static struct hc_driver adm5120_hc_driver = {
+	.description =		hcd_name,
+	.product_desc =		"ADM5120 HCD",
+	.hcd_priv_size =	sizeof(struct admhcd),
+	.flags =		HCD_USB11,
+	.urb_enqueue =		admhcd_urb_enqueue,
+	.urb_dequeue =		admhcd_urb_dequeue,
+	.endpoint_disable =	admhcd_endpoint_disable,
+	.get_frame_number =	admhcd_get_frame_number,
+	.hub_status_data =	admhcd_hub_status_data,
+	.hub_control =		admhcd_hub_control,
+};
+
+static int __init adm5120hcd_probe(struct platform_device *pdev)
+{
+	struct usb_hcd *hcd;
+	struct admhcd *ahcd;
+	struct usb_device *udev;
+	int err = 0;
+
+	if (!request_mem_region(pdev->resource[0].start,
+	    pdev->resource[0].end - pdev->resource[0].start, hcd_name)) {
+		pr_debug("couldn't request mem\n");
+		err = -EBUSY;
+		goto out;
+	}
+
+	//hcd = usb_create_hcd(&adm5120_hc_driver, pdev, pdev->bus_id);
+	if (!hcd)
+		goto out_mem;
+
+	ahcd = hcd_to_admhcd(hcd);
+	dev_set_drvdata(pdev, ahcd);
+	hcd->self.controller = pdev;
+	//hcd->self.bus_name = pdev->bus_id;
+	hcd->irq = pdev->resource[1].start;
+	hcd->regs = (void *)pdev->resource[0].start;
+	hcd->product_desc = hcd_name;
+	ahcd->base = pdev->resource[0].start;
+
+	if (request_irq(pdev->resource[1].start, adm5120hcd_irq, 0, hcd_name,
+	    hcd)) {
+		pr_debug("couldn't request irq\n");
+		err = -EBUSY;
+		goto out_hcd;
+	}
+
+	//err = usb_register_bus(&hcd->self);
+	//if (err < 0)
+	//	goto out_irq;
+
+	spin_lock_init(&ahcd->lock);
+
+	admhcd_reg_set(ahcd, ADMHCD_REG_INTENABLE, 0);
+	mdelay(10);
+	admhcd_reg_set(ahcd, ADMHCD_REG_CONTROL, ADMHCD_SW_RESET);
+	while (admhcd_reg_get(ahcd, ADMHCD_REG_CONTROL) & ADMHCD_SW_RESET)
+		mdelay(1);
+
+	admhcd_reg_set(ahcd, ADMHCD_REG_CONTROL, ADMHCD_HOST_EN);
+	admhcd_reg_set(ahcd, ADMHCD_REG_HOSTHEAD, 0x00000000);
+	admhcd_reg_set(ahcd, ADMHCD_REG_FMINTERVAL, 0x20002edf);
+	admhcd_reg_set(ahcd, ADMHCD_REG_LSTHRESH, 0x628);
+	admhcd_reg_set(ahcd, ADMHCD_REG_INTENABLE,
+	    ADMHCD_INT_ACT | ADMHCD_INT_FATAL | ADMHCD_INT_SW | ADMHCD_INT_TD);
+	admhcd_reg_set(ahcd, ADMHCD_REG_INTSTATUS,
+	    ADMHCD_INT_ACT | ADMHCD_INT_FATAL | ADMHCD_INT_SW | ADMHCD_INT_TD);
+	admhcd_reg_set(ahcd, ADMHCD_REG_RHDESCR, ADMHCD_NPS | ADMHCD_LPSC);
+	admhcd_reg_set(ahcd, ADMHCD_REG_HOSTCONTROL, ADMHCD_STATE_OP);
+
+	udev = usb_alloc_dev(NULL, &hcd->self, 0);
+	if (!udev) {
+		err = -ENOMEM;
+		goto out_bus;
+	}
+
+	udev->speed = USB_SPEED_FULL;
+	hcd->state = HC_STATE_RUNNING;
+
+	//err = hcd_register_root(udev, hcd);
+	//if (err != 0) {
+	//	usb_put_dev(udev);
+	//	goto out_dev;
+	//}
+
+	return 0;
+
+out_dev:
+	usb_put_dev(udev);
+out_bus:
+	//usb_deregister_bus(&hcd->self);
+out_irq:
+	free_irq(pdev->resource[1].start, hcd);
+out_hcd:
+	usb_put_hcd(hcd);
+out_mem:
+	release_mem_region(pdev->resource[0].start,
+	    pdev->resource[0].end - pdev->resource[0].start);
+out:
+	return err;
+}
+
+static int __init_or_module adm5120hcd_remove(struct platform_device *pdev)
+{
+	device_init_wakeup(&pdev->dev, 0);
+}
+
+static struct platform_driver adm5120hcd_driver = {
+	.probe =	adm5120hcd_probe,
+	.remove =	adm5120hcd_remove,
+	.driver	=	{
+		.name 	= "adm5120-hcd",
+		.owner 	= THIS_MODULE,
+	},
+};
+
+static int __init adm5120hcd_init(void)
+{
+	if (usb_disabled())
+		return -ENODEV;
+
+	return platform_driver_register(&adm5120hcd_driver);
+}
+
+static void __exit adm5120hcd_exit(void)
+{
+	platform_driver_unregister(&adm5120hcd_driver);
+}
+
+module_init(adm5120hcd_init);
+module_exit(adm5120hcd_exit);