USB: gadaget: add Marvell controller support

Signed-off-by: Lei Wen <leiwen@marvell.com>

3 files changed, 507 insertions, 0 deletions

diff --git a/drivers/usb/gadget/Makefile b/drivers/usb/gadget/Makefile
index 5e72713..820ca9b 100644
--- a/drivers/usb/gadget/Makefile
+++ b/drivers/usb/gadget/Makefile
@@ -29,6 +29,7 @@ LIB	:= $(obj)libusb_gadget.o
 ifdef CONFIG_USB_ETHER
 COBJS-y += ether.o epautoconf.o config.o usbstring.o
 COBJS-$(CONFIG_USB_ETH_RNDIS) += rndis.o
+COBJS-$(CONFIG_MV_UDC)	+= mv_udc.o
 else
 # Devices not related to the new gadget layer depend on CONFIG_USB_DEVICE
 ifdef CONFIG_USB_DEVICE
diff --git a/drivers/usb/gadget/gadget_chips.h b/drivers/usb/gadget/gadget_chips.h
index 9bb7e2e..5d7b638 100644
--- a/drivers/usb/gadget/gadget_chips.h
+++ b/drivers/usb/gadget/gadget_chips.h
@@ -150,6 +150,11 @@
 #define	gadget_is_m66592(g)	0
 #endif
 
+#ifdef CONFIG_USB_GADGET_MV
+#define gadget_is_mv(g)        (!strcmp("mv_udc", (g)->name))
+#else
+#define gadget_is_mv(g)        0
+#endif
 
 /*
  * CONFIG_USB_GADGET_SX2
@@ -216,5 +221,7 @@ static inline int usb_gadget_controller_number(struct usb_gadget *gadget)
 		return 0x20;
 	else if (gadget_is_m66592(gadget))
 		return 0x21;
+	else if (gadget_is_mv(gadget))
+		return 0x22;
 	return -ENOENT;
 }
diff --git a/drivers/usb/gadget/mv_udc.c b/drivers/usb/gadget/mv_udc.c
new file mode 100644
index 0000000..cdbdcfa
--- /dev/null
+++ b/drivers/usb/gadget/mv_udc.c
@@ -0,0 +1,499 @@
+/*
+ * Copyright 2011, Marvell Semiconductor Inc.
+ * Lei Wen <leiwen@marvell.com>
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ *
+ * Back ported to the 8xx platform (from the 8260 platform) by
+ * Murray.Jensen@cmst.csiro.au, 27-Jan-01.
+ */
+
+#include <common.h>
+#include <command.h>
+#include <config.h>
+#include <net.h>
+#include <malloc.h>
+#include <asm/io.h>
+#include <linux/types.h>
+#include <usb/mv_udc.h>
+
+#ifndef DEBUG
+#define DBG(x...) do {} while (0)
+#else
+#define DBG(x...) printf(x)
+static const char *reqname(unsigned r)
+{
+	switch (r) {
+	case USB_REQ_GET_STATUS: return "GET_STATUS";
+	case USB_REQ_CLEAR_FEATURE: return "CLEAR_FEATURE";
+	case USB_REQ_SET_FEATURE: return "SET_FEATURE";
+	case USB_REQ_SET_ADDRESS: return "SET_ADDRESS";
+	case USB_REQ_GET_DESCRIPTOR: return "GET_DESCRIPTOR";
+	case USB_REQ_SET_DESCRIPTOR: return "SET_DESCRIPTOR";
+	case USB_REQ_GET_CONFIGURATION: return "GET_CONFIGURATION";
+	case USB_REQ_SET_CONFIGURATION: return "SET_CONFIGURATION";
+	case USB_REQ_GET_INTERFACE: return "GET_INTERFACE";
+	case USB_REQ_SET_INTERFACE: return "SET_INTERFACE";
+	default: return "*UNKNOWN*";
+	}
+}
+#endif
+
+#define PAGE_SIZE	4096
+#define QH_MAXNUM	32
+static struct usb_endpoint_descriptor ep0_out_desc = {
+	.bLength = sizeof(struct usb_endpoint_descriptor),
+	.bDescriptorType = USB_DT_ENDPOINT,
+	.bEndpointAddress = 0,
+	.bmAttributes =	USB_ENDPOINT_XFER_CONTROL,
+};
+
+static struct usb_endpoint_descriptor ep0_in_desc = {
+	.bLength = sizeof(struct usb_endpoint_descriptor),
+	.bDescriptorType = USB_DT_ENDPOINT,
+	.bEndpointAddress = USB_DIR_IN,
+	.bmAttributes =	USB_ENDPOINT_XFER_CONTROL,
+};
+
+struct ept_queue_head *epts;
+struct ept_queue_item *items[2 * NUM_ENDPOINTS];
+static int mv_pullup(struct usb_gadget *gadget, int is_on);
+static int mv_ep_enable(struct usb_ep *ep,
+		const struct usb_endpoint_descriptor *desc);
+static int mv_ep_disable(struct usb_ep *ep);
+static int mv_ep_queue(struct usb_ep *ep,
+		struct usb_request *req, gfp_t gfp_flags);
+static struct usb_request *
+mv_ep_alloc_request(struct usb_ep *ep, unsigned int gfp_flags);
+static void mv_ep_free_request(struct usb_ep *ep, struct usb_request *_req);
+
+static struct usb_gadget_ops mv_udc_ops = {
+	.pullup = mv_pullup,
+};
+
+static struct usb_ep_ops mv_ep_ops = {
+	.enable         = mv_ep_enable,
+	.disable        = mv_ep_disable,
+	.queue          = mv_ep_queue,
+	.alloc_request  = mv_ep_alloc_request,
+	.free_request   = mv_ep_free_request,
+};
+
+static struct mv_ep ep[2 * NUM_ENDPOINTS];
+static struct mv_drv controller = {
+	.gadget = {
+		.ep0 = &ep[0].ep,
+		.name = "mv_udc",
+	},
+};
+
+static struct usb_request *
+mv_ep_alloc_request(struct usb_ep *ep, unsigned int gfp_flags)
+{
+	struct mv_ep *mv_ep = container_of(ep, struct mv_ep, ep);
+	return &mv_ep->req;
+}
+
+static void mv_ep_free_request(struct usb_ep *ep, struct usb_request *_req)
+{
+	return;
+}
+
+static void ep_enable(int num, int in)
+{
+	struct ept_queue_head *head;
+	struct mv_udc *udc = controller.udc;
+	unsigned n;
+	head = epts + 2*num + in;
+
+	n = readl(&udc->epctrl[num]);
+	if (in)
+		n |= (CTRL_TXE | CTRL_TXR | CTRL_TXT_BULK);
+	else
+		n |= (CTRL_RXE | CTRL_RXR | CTRL_RXT_BULK);
+
+	if (num != 0)
+		head->config = CONFIG_MAX_PKT(EP_MAX_PACKET_SIZE) | CONFIG_ZLT;
+	writel(n, &udc->epctrl[num]);
+}
+
+static int mv_ep_enable(struct usb_ep *ep,
+		const struct usb_endpoint_descriptor *desc)
+{
+	struct mv_ep *mv_ep = container_of(ep, struct mv_ep, ep);
+	int num, in;
+	num = desc->bEndpointAddress & USB_ENDPOINT_NUMBER_MASK;
+	in = (desc->bEndpointAddress & USB_DIR_IN) != 0;
+	ep_enable(num, in);
+	mv_ep->desc = desc;
+	return 0;
+}
+
+static int mv_ep_disable(struct usb_ep *ep)
+{
+	return 0;
+}
+
+static int mv_ep_queue(struct usb_ep *ep,
+		struct usb_request *req, gfp_t gfp_flags)
+{
+	struct mv_ep *mv_ep = container_of(ep, struct mv_ep, ep);
+	struct mv_udc *udc = controller.udc;
+	struct ept_queue_item *item;
+	struct ept_queue_head *head;
+	unsigned phys;
+	int bit, num, len, in;
+	num = mv_ep->desc->bEndpointAddress & USB_ENDPOINT_NUMBER_MASK;
+	in = (mv_ep->desc->bEndpointAddress & USB_DIR_IN) != 0;
+	item = items[2 * num + in];
+	head = epts + 2 * num + in;
+	phys = (unsigned)req->buf;
+	len = req->length;
+
+	item->next = TERMINATE;
+	item->info = INFO_BYTES(len) | INFO_IOC | INFO_ACTIVE;
+	item->page0 = phys;
+	item->page1 = (phys & 0xfffff000) + 0x1000;
+
+	head->next = (unsigned) item;
+	head->info = 0;
+
+	DBG("ept%d %s queue len %x, buffer %x\n",
+			num, in ? "in" : "out", len, phys);
+
+	if (in)
+		bit = EPT_TX(num);
+	else
+		bit = EPT_RX(num);
+
+	flush_cache(phys, len);
+	flush_cache((unsigned long)item, sizeof(struct ept_queue_item));
+	writel(bit, &udc->epprime);
+
+	return 0;
+}
+
+static void handle_ep_complete(struct mv_ep *ep)
+{
+	struct ept_queue_item *item;
+	int num, in, len;
+	num = ep->desc->bEndpointAddress & USB_ENDPOINT_NUMBER_MASK;
+	in = (ep->desc->bEndpointAddress & USB_DIR_IN) != 0;
+	if (num == 0)
+		ep->desc = &ep0_out_desc;
+	item = items[2 * num + in];
+
+	if (item->info & 0xff)
+		printf("EP%d/%s FAIL nfo=%x pg0=%x\n",
+			num, in ? "in" : "out", item->info, item->page0);
+
+	len = (item->info >> 16) & 0x7fff;
+	ep->req.length -= len;
+	DBG("ept%d %s complete %x\n",
+			num, in ? "in" : "out", len);
+	ep->req.complete(&ep->ep, &ep->req);
+	if (num == 0) {
+		ep->req.length = 0;
+		usb_ep_queue(&ep->ep, &ep->req, 0);
+		ep->desc = &ep0_in_desc;
+	}
+}
+
+#define SETUP(type, request) (((type) << 8) | (request))
+
+static void handle_setup(void)
+{
+	struct usb_request *req = &ep[0].req;
+	struct mv_udc *udc = controller.udc;
+	struct ept_queue_head *head;
+	struct usb_ctrlrequest r;
+	int status = 0;
+	int num, in, _num, _in, i;
+	char *buf;
+	head = epts;
+
+	flush_cache((unsigned long)head, sizeof(struct ept_queue_head));
+	memcpy(&r, head->setup_data, sizeof(struct usb_ctrlrequest));
+	writel(EPT_RX(0), &udc->epstat);
+	DBG("handle setup %s, %x, %x index %x value %x\n", reqname(r.bRequest),
+	    r.bRequestType, r.bRequest, r.wIndex, r.wValue);
+
+	switch (SETUP(r.bRequestType, r.bRequest)) {
+	case SETUP(USB_RECIP_ENDPOINT, USB_REQ_CLEAR_FEATURE):
+		_num = r.wIndex & 15;
+		_in = !!(r.wIndex & 0x80);
+
+		if ((r.wValue == 0) && (r.wLength == 0)) {
+			req->length = 0;
+			for (i = 0; i < NUM_ENDPOINTS; i++) {
+				if (!ep[i].desc)
+					continue;
+				num = ep[i].desc->bEndpointAddress
+					& USB_ENDPOINT_NUMBER_MASK;
+				in = (ep[i].desc->bEndpointAddress
+						& USB_DIR_IN) != 0;
+				if ((num == _num) && (in == _in)) {
+					ep_enable(num, in);
+					usb_ep_queue(controller.gadget.ep0,
+							req, 0);
+					break;
+				}
+			}
+		}
+		return;
+
+	case SETUP(USB_RECIP_DEVICE, USB_REQ_SET_ADDRESS):
+		/*
+		 * write address delayed (will take effect
+		 * after the next IN txn)
+		 */
+		writel((r.wValue << 25) | (1 << 24), &udc->devaddr);
+		req->length = 0;
+		usb_ep_queue(controller.gadget.ep0, req, 0);
+		return;
+
+	case SETUP(USB_DIR_IN | USB_RECIP_DEVICE, USB_REQ_GET_STATUS):
+		req->length = 2;
+		buf = (char *)req->buf;
+		buf[0] = 1 << USB_DEVICE_SELF_POWERED;
+		buf[1] = 0;
+		usb_ep_queue(controller.gadget.ep0, req, 0);
+		return;
+	}
+	/* pass request up to the gadget driver */
+	if (controller.driver)
+		status = controller.driver->setup(&controller.gadget, &r);
+	else
+		status = -ENODEV;
+
+	if (!status)
+		return;
+	DBG("STALL reqname %s type %x value %x, index %x\n",
+	    reqname(r.bRequest), r.bRequestType, r.wValue, r.wIndex);
+	writel((1<<16) | (1 << 0), &udc->epctrl[0]);
+}
+
+static void stop_activity(void)
+{
+	int i, num, in;
+	struct ept_queue_head *head;
+	struct mv_udc *udc = controller.udc;
+	writel(readl(&udc->epcomp), &udc->epcomp);
+	writel(readl(&udc->epstat), &udc->epstat);
+	writel(0xffffffff, &udc->epflush);
+
+	/* error out any pending reqs */
+	for (i = 0; i < NUM_ENDPOINTS; i++) {
+		if (i != 0)
+			writel(0, &udc->epctrl[i]);
+		if (ep[i].desc) {
+			num = ep[i].desc->bEndpointAddress
+				& USB_ENDPOINT_NUMBER_MASK;
+			in = (ep[i].desc->bEndpointAddress & USB_DIR_IN) != 0;
+			head = epts + (num * 2) + (in);
+			head->info = INFO_ACTIVE;
+		}
+	}
+}
+
+void udc_irq(void)
+{
+	struct mv_udc *udc = controller.udc;
+	unsigned n = readl(&udc->usbsts);
+	writel(n, &udc->usbsts);
+	int bit, i, num, in;
+
+	n &= (STS_SLI | STS_URI | STS_PCI | STS_UI | STS_UEI);
+	if (n == 0)
+		return;
+
+	if (n & STS_URI) {
+		DBG("-- reset --\n");
+		stop_activity();
+	}
+	if (n & STS_SLI)
+		DBG("-- suspend --\n");
+
+	if (n & STS_PCI) {
+		DBG("-- portchange --\n");
+		bit = (readl(&udc->portsc) >> 26) & 3;
+		if (bit == 2) {
+			controller.gadget.speed = USB_SPEED_HIGH;
+			for (i = 1; i < NUM_ENDPOINTS && n; i++)
+				if (ep[i].desc)
+					ep[i].ep.maxpacket = 512;
+		} else {
+			controller.gadget.speed = USB_SPEED_FULL;
+		}
+	}
+
+	if (n & STS_UEI)
+		printf("<UEI %x>\n", readl(&udc->epcomp));
+
+	if ((n & STS_UI) || (n & STS_UEI)) {
+		n = readl(&udc->epstat);
+		if (n & EPT_RX(0))
+			handle_setup();
+
+		n = readl(&udc->epcomp);
+		if (n != 0)
+			writel(n, &udc->epcomp);
+
+		for (i = 0; i < NUM_ENDPOINTS && n; i++) {
+			if (ep[i].desc) {
+				num = ep[i].desc->bEndpointAddress
+					& USB_ENDPOINT_NUMBER_MASK;
+				in = (ep[i].desc->bEndpointAddress
+						& USB_DIR_IN) != 0;
+				bit = (in) ? EPT_TX(num) : EPT_RX(num);
+				if (n & bit)
+					handle_ep_complete(&ep[i]);
+			}
+		}
+	}
+}
+
+int usb_gadget_handle_interrupts(void)
+{
+	u32 value;
+	struct mv_udc *udc = controller.udc;
+
+	value = readl(&udc->usbsts);
+	if (value)
+		udc_irq();
+
+	return value;
+}
+
+static int mv_pullup(struct usb_gadget *gadget, int is_on)
+{
+	struct mv_udc *udc = controller.udc;
+	if (is_on) {
+		/* RESET */
+		writel(USBCMD_ITC(MICRO_8FRAME) | USBCMD_RST, &udc->usbcmd);
+		udelay(200);
+
+		writel((unsigned) epts, &udc->epinitaddr);
+
+		/* select DEVICE mode */
+		writel(USBMODE_DEVICE, &udc->usbmode);
+
+		writel(0xffffffff, &udc->epflush);
+
+		/* Turn on the USB connection by enabling the pullup resistor */
+		writel(USBCMD_ITC(MICRO_8FRAME) | USBCMD_RUN, &udc->usbcmd);
+	} else {
+		stop_activity();
+		writel(USBCMD_FS2, &udc->usbcmd);
+		udelay(800);
+		if (controller.driver)
+			controller.driver->disconnect(gadget);
+	}
+
+	return 0;
+}
+
+void udc_disconnect(void)
+{
+	struct mv_udc *udc = controller.udc;
+	/* disable pullup */
+	stop_activity();
+	writel(USBCMD_FS2, &udc->usbcmd);
+	udelay(800);
+	if (controller.driver)
+		controller.driver->disconnect(&controller.gadget);
+}
+
+static int mvudc_probe(void)
+{
+	struct ept_queue_head *head;
+	int i;
+
+	controller.gadget.ops = &mv_udc_ops;
+	controller.udc = (struct mv_udc *)CONFIG_USB_REG_BASE;
+	epts = memalign(PAGE_SIZE, QH_MAXNUM * sizeof(struct ept_queue_head));
+	memset(epts, 0, QH_MAXNUM * sizeof(struct ept_queue_head));
+	for (i = 0; i < 2 * NUM_ENDPOINTS; i++) {
+		/*
+		 * For item0 and item1, they are served as ep0
+		 * out&in seperately
+		 */
+		head = epts + i;
+		if (i < 2)
+			head->config = CONFIG_MAX_PKT(EP0_MAX_PACKET_SIZE)
+				| CONFIG_ZLT | CONFIG_IOS;
+		else
+			head->config = CONFIG_MAX_PKT(EP_MAX_PACKET_SIZE)
+				| CONFIG_ZLT;
+		head->next = TERMINATE;
+		head->info = 0;
+
+		items[i] = memalign(PAGE_SIZE, sizeof(struct ept_queue_item));
+	}
+
+	INIT_LIST_HEAD(&controller.gadget.ep_list);
+	ep[0].ep.maxpacket = 64;
+	ep[0].ep.name = "ep0";
+	ep[0].desc = &ep0_in_desc;
+	INIT_LIST_HEAD(&controller.gadget.ep0->ep_list);
+	for (i = 0; i < 2 * NUM_ENDPOINTS; i++) {
+		if (i != 0) {
+			ep[i].ep.maxpacket = 512;
+			ep[i].ep.name = "ep-";
+			list_add_tail(&ep[i].ep.ep_list,
+				      &controller.gadget.ep_list);
+			ep[i].desc = NULL;
+		}
+		ep[i].ep.ops = &mv_ep_ops;
+	}
+	return 0;
+}
+
+int usb_gadget_register_driver(struct usb_gadget_driver *driver)
+{
+	struct mv_udc *udc = controller.udc;
+	int             retval;
+
+	if (!driver
+			|| driver->speed < USB_SPEED_FULL
+			|| !driver->bind
+			|| !driver->setup) {
+		DBG("bad parameter.\n");
+		return -EINVAL;
+	}
+
+	if (!mvudc_probe()) {
+		usb_lowlevel_init();
+		/* select ULPI phy */
+		writel(PTS(PTS_ENABLE) | PFSC, &udc->portsc);
+	}
+	retval = driver->bind(&controller.gadget);
+	if (retval) {
+		DBG("driver->bind() returned %d\n", retval);
+		return retval;
+	}
+	controller.driver = driver;
+
+	return 0;
+}
+
+int usb_gadget_unregister_driver(struct usb_gadget_driver *driver)
+{
+	return 0;
+}