mirror of
https://github.com/brain-hackers/u-boot-brain
synced 2024-09-08 13:53:21 +09:00
500 lines
12 KiB
C
500 lines
12 KiB
C
/*
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* Copyright 2011, Marvell Semiconductor Inc.
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* Lei Wen <leiwen@marvell.com>
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*
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* See file CREDITS for list of people who contributed to this
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* project.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of
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* the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
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* MA 02111-1307 USA
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*
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* Back ported to the 8xx platform (from the 8260 platform) by
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* Murray.Jensen@cmst.csiro.au, 27-Jan-01.
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*/
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#include <common.h>
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#include <command.h>
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#include <config.h>
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#include <net.h>
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#include <malloc.h>
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#include <asm/io.h>
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#include <linux/types.h>
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#include <usb/mv_udc.h>
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#ifndef DEBUG
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#define DBG(x...) do {} while (0)
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#else
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#define DBG(x...) printf(x)
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static const char *reqname(unsigned r)
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{
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switch (r) {
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case USB_REQ_GET_STATUS: return "GET_STATUS";
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case USB_REQ_CLEAR_FEATURE: return "CLEAR_FEATURE";
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case USB_REQ_SET_FEATURE: return "SET_FEATURE";
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case USB_REQ_SET_ADDRESS: return "SET_ADDRESS";
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case USB_REQ_GET_DESCRIPTOR: return "GET_DESCRIPTOR";
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case USB_REQ_SET_DESCRIPTOR: return "SET_DESCRIPTOR";
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case USB_REQ_GET_CONFIGURATION: return "GET_CONFIGURATION";
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case USB_REQ_SET_CONFIGURATION: return "SET_CONFIGURATION";
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case USB_REQ_GET_INTERFACE: return "GET_INTERFACE";
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case USB_REQ_SET_INTERFACE: return "SET_INTERFACE";
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default: return "*UNKNOWN*";
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}
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}
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#endif
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#define PAGE_SIZE 4096
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#define QH_MAXNUM 32
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static struct usb_endpoint_descriptor ep0_out_desc = {
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.bLength = sizeof(struct usb_endpoint_descriptor),
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.bDescriptorType = USB_DT_ENDPOINT,
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.bEndpointAddress = 0,
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.bmAttributes = USB_ENDPOINT_XFER_CONTROL,
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};
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static struct usb_endpoint_descriptor ep0_in_desc = {
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.bLength = sizeof(struct usb_endpoint_descriptor),
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.bDescriptorType = USB_DT_ENDPOINT,
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.bEndpointAddress = USB_DIR_IN,
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.bmAttributes = USB_ENDPOINT_XFER_CONTROL,
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};
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struct ept_queue_head *epts;
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struct ept_queue_item *items[2 * NUM_ENDPOINTS];
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static int mv_pullup(struct usb_gadget *gadget, int is_on);
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static int mv_ep_enable(struct usb_ep *ep,
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const struct usb_endpoint_descriptor *desc);
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static int mv_ep_disable(struct usb_ep *ep);
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static int mv_ep_queue(struct usb_ep *ep,
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struct usb_request *req, gfp_t gfp_flags);
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static struct usb_request *
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mv_ep_alloc_request(struct usb_ep *ep, unsigned int gfp_flags);
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static void mv_ep_free_request(struct usb_ep *ep, struct usb_request *_req);
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static struct usb_gadget_ops mv_udc_ops = {
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.pullup = mv_pullup,
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};
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static struct usb_ep_ops mv_ep_ops = {
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.enable = mv_ep_enable,
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.disable = mv_ep_disable,
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.queue = mv_ep_queue,
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.alloc_request = mv_ep_alloc_request,
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.free_request = mv_ep_free_request,
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};
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static struct mv_ep ep[2 * NUM_ENDPOINTS];
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static struct mv_drv controller = {
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.gadget = {
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.ep0 = &ep[0].ep,
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.name = "mv_udc",
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},
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};
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static struct usb_request *
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mv_ep_alloc_request(struct usb_ep *ep, unsigned int gfp_flags)
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{
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struct mv_ep *mv_ep = container_of(ep, struct mv_ep, ep);
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return &mv_ep->req;
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}
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static void mv_ep_free_request(struct usb_ep *ep, struct usb_request *_req)
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{
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return;
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}
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static void ep_enable(int num, int in)
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{
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struct ept_queue_head *head;
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struct mv_udc *udc = controller.udc;
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unsigned n;
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head = epts + 2*num + in;
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n = readl(&udc->epctrl[num]);
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if (in)
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n |= (CTRL_TXE | CTRL_TXR | CTRL_TXT_BULK);
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else
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n |= (CTRL_RXE | CTRL_RXR | CTRL_RXT_BULK);
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if (num != 0)
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head->config = CONFIG_MAX_PKT(EP_MAX_PACKET_SIZE) | CONFIG_ZLT;
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writel(n, &udc->epctrl[num]);
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}
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static int mv_ep_enable(struct usb_ep *ep,
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const struct usb_endpoint_descriptor *desc)
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{
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struct mv_ep *mv_ep = container_of(ep, struct mv_ep, ep);
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int num, in;
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num = desc->bEndpointAddress & USB_ENDPOINT_NUMBER_MASK;
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in = (desc->bEndpointAddress & USB_DIR_IN) != 0;
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ep_enable(num, in);
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mv_ep->desc = desc;
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return 0;
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}
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static int mv_ep_disable(struct usb_ep *ep)
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{
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return 0;
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}
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static int mv_ep_queue(struct usb_ep *ep,
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struct usb_request *req, gfp_t gfp_flags)
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{
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struct mv_ep *mv_ep = container_of(ep, struct mv_ep, ep);
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struct mv_udc *udc = controller.udc;
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struct ept_queue_item *item;
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struct ept_queue_head *head;
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unsigned phys;
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int bit, num, len, in;
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num = mv_ep->desc->bEndpointAddress & USB_ENDPOINT_NUMBER_MASK;
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in = (mv_ep->desc->bEndpointAddress & USB_DIR_IN) != 0;
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item = items[2 * num + in];
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head = epts + 2 * num + in;
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phys = (unsigned)req->buf;
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len = req->length;
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item->next = TERMINATE;
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item->info = INFO_BYTES(len) | INFO_IOC | INFO_ACTIVE;
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item->page0 = phys;
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item->page1 = (phys & 0xfffff000) + 0x1000;
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head->next = (unsigned) item;
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head->info = 0;
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DBG("ept%d %s queue len %x, buffer %x\n",
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num, in ? "in" : "out", len, phys);
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if (in)
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bit = EPT_TX(num);
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else
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bit = EPT_RX(num);
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flush_cache(phys, len);
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flush_cache((unsigned long)item, sizeof(struct ept_queue_item));
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writel(bit, &udc->epprime);
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return 0;
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}
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static void handle_ep_complete(struct mv_ep *ep)
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{
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struct ept_queue_item *item;
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int num, in, len;
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num = ep->desc->bEndpointAddress & USB_ENDPOINT_NUMBER_MASK;
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in = (ep->desc->bEndpointAddress & USB_DIR_IN) != 0;
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if (num == 0)
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ep->desc = &ep0_out_desc;
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item = items[2 * num + in];
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if (item->info & 0xff)
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printf("EP%d/%s FAIL nfo=%x pg0=%x\n",
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num, in ? "in" : "out", item->info, item->page0);
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len = (item->info >> 16) & 0x7fff;
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ep->req.length -= len;
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DBG("ept%d %s complete %x\n",
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num, in ? "in" : "out", len);
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ep->req.complete(&ep->ep, &ep->req);
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if (num == 0) {
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ep->req.length = 0;
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usb_ep_queue(&ep->ep, &ep->req, 0);
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ep->desc = &ep0_in_desc;
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}
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}
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#define SETUP(type, request) (((type) << 8) | (request))
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static void handle_setup(void)
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{
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struct usb_request *req = &ep[0].req;
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struct mv_udc *udc = controller.udc;
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struct ept_queue_head *head;
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struct usb_ctrlrequest r;
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int status = 0;
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int num, in, _num, _in, i;
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char *buf;
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head = epts;
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flush_cache((unsigned long)head, sizeof(struct ept_queue_head));
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memcpy(&r, head->setup_data, sizeof(struct usb_ctrlrequest));
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writel(EPT_RX(0), &udc->epstat);
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DBG("handle setup %s, %x, %x index %x value %x\n", reqname(r.bRequest),
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r.bRequestType, r.bRequest, r.wIndex, r.wValue);
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switch (SETUP(r.bRequestType, r.bRequest)) {
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case SETUP(USB_RECIP_ENDPOINT, USB_REQ_CLEAR_FEATURE):
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_num = r.wIndex & 15;
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_in = !!(r.wIndex & 0x80);
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if ((r.wValue == 0) && (r.wLength == 0)) {
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req->length = 0;
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for (i = 0; i < NUM_ENDPOINTS; i++) {
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if (!ep[i].desc)
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continue;
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num = ep[i].desc->bEndpointAddress
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& USB_ENDPOINT_NUMBER_MASK;
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in = (ep[i].desc->bEndpointAddress
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& USB_DIR_IN) != 0;
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if ((num == _num) && (in == _in)) {
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ep_enable(num, in);
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usb_ep_queue(controller.gadget.ep0,
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req, 0);
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break;
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}
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}
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}
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return;
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case SETUP(USB_RECIP_DEVICE, USB_REQ_SET_ADDRESS):
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/*
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* write address delayed (will take effect
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* after the next IN txn)
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*/
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writel((r.wValue << 25) | (1 << 24), &udc->devaddr);
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req->length = 0;
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usb_ep_queue(controller.gadget.ep0, req, 0);
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return;
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case SETUP(USB_DIR_IN | USB_RECIP_DEVICE, USB_REQ_GET_STATUS):
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req->length = 2;
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buf = (char *)req->buf;
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buf[0] = 1 << USB_DEVICE_SELF_POWERED;
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buf[1] = 0;
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usb_ep_queue(controller.gadget.ep0, req, 0);
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return;
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}
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/* pass request up to the gadget driver */
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if (controller.driver)
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status = controller.driver->setup(&controller.gadget, &r);
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else
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status = -ENODEV;
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if (!status)
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return;
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DBG("STALL reqname %s type %x value %x, index %x\n",
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reqname(r.bRequest), r.bRequestType, r.wValue, r.wIndex);
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writel((1<<16) | (1 << 0), &udc->epctrl[0]);
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}
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static void stop_activity(void)
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{
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int i, num, in;
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struct ept_queue_head *head;
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struct mv_udc *udc = controller.udc;
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writel(readl(&udc->epcomp), &udc->epcomp);
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writel(readl(&udc->epstat), &udc->epstat);
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writel(0xffffffff, &udc->epflush);
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/* error out any pending reqs */
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for (i = 0; i < NUM_ENDPOINTS; i++) {
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if (i != 0)
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writel(0, &udc->epctrl[i]);
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if (ep[i].desc) {
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num = ep[i].desc->bEndpointAddress
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& USB_ENDPOINT_NUMBER_MASK;
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in = (ep[i].desc->bEndpointAddress & USB_DIR_IN) != 0;
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head = epts + (num * 2) + (in);
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head->info = INFO_ACTIVE;
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}
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}
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}
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void udc_irq(void)
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{
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struct mv_udc *udc = controller.udc;
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unsigned n = readl(&udc->usbsts);
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writel(n, &udc->usbsts);
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int bit, i, num, in;
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n &= (STS_SLI | STS_URI | STS_PCI | STS_UI | STS_UEI);
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if (n == 0)
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return;
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if (n & STS_URI) {
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DBG("-- reset --\n");
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stop_activity();
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}
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if (n & STS_SLI)
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DBG("-- suspend --\n");
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if (n & STS_PCI) {
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DBG("-- portchange --\n");
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bit = (readl(&udc->portsc) >> 26) & 3;
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if (bit == 2) {
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controller.gadget.speed = USB_SPEED_HIGH;
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for (i = 1; i < NUM_ENDPOINTS && n; i++)
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if (ep[i].desc)
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ep[i].ep.maxpacket = 512;
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} else {
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controller.gadget.speed = USB_SPEED_FULL;
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}
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}
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if (n & STS_UEI)
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printf("<UEI %x>\n", readl(&udc->epcomp));
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if ((n & STS_UI) || (n & STS_UEI)) {
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n = readl(&udc->epstat);
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if (n & EPT_RX(0))
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handle_setup();
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n = readl(&udc->epcomp);
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if (n != 0)
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writel(n, &udc->epcomp);
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for (i = 0; i < NUM_ENDPOINTS && n; i++) {
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if (ep[i].desc) {
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num = ep[i].desc->bEndpointAddress
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& USB_ENDPOINT_NUMBER_MASK;
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in = (ep[i].desc->bEndpointAddress
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& USB_DIR_IN) != 0;
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bit = (in) ? EPT_TX(num) : EPT_RX(num);
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if (n & bit)
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handle_ep_complete(&ep[i]);
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}
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}
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}
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}
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int usb_gadget_handle_interrupts(void)
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{
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u32 value;
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struct mv_udc *udc = controller.udc;
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value = readl(&udc->usbsts);
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if (value)
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udc_irq();
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return value;
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}
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static int mv_pullup(struct usb_gadget *gadget, int is_on)
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{
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struct mv_udc *udc = controller.udc;
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if (is_on) {
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/* RESET */
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writel(USBCMD_ITC(MICRO_8FRAME) | USBCMD_RST, &udc->usbcmd);
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udelay(200);
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writel((unsigned) epts, &udc->epinitaddr);
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/* select DEVICE mode */
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writel(USBMODE_DEVICE, &udc->usbmode);
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writel(0xffffffff, &udc->epflush);
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/* Turn on the USB connection by enabling the pullup resistor */
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writel(USBCMD_ITC(MICRO_8FRAME) | USBCMD_RUN, &udc->usbcmd);
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} else {
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stop_activity();
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writel(USBCMD_FS2, &udc->usbcmd);
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udelay(800);
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if (controller.driver)
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controller.driver->disconnect(gadget);
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}
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return 0;
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}
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void udc_disconnect(void)
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{
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struct mv_udc *udc = controller.udc;
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/* disable pullup */
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stop_activity();
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writel(USBCMD_FS2, &udc->usbcmd);
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udelay(800);
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if (controller.driver)
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controller.driver->disconnect(&controller.gadget);
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}
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static int mvudc_probe(void)
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{
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struct ept_queue_head *head;
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int i;
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controller.gadget.ops = &mv_udc_ops;
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controller.udc = (struct mv_udc *)CONFIG_USB_REG_BASE;
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epts = memalign(PAGE_SIZE, QH_MAXNUM * sizeof(struct ept_queue_head));
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memset(epts, 0, QH_MAXNUM * sizeof(struct ept_queue_head));
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for (i = 0; i < 2 * NUM_ENDPOINTS; i++) {
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/*
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* For item0 and item1, they are served as ep0
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* out&in seperately
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*/
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head = epts + i;
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if (i < 2)
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head->config = CONFIG_MAX_PKT(EP0_MAX_PACKET_SIZE)
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| CONFIG_ZLT | CONFIG_IOS;
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else
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head->config = CONFIG_MAX_PKT(EP_MAX_PACKET_SIZE)
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| CONFIG_ZLT;
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head->next = TERMINATE;
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head->info = 0;
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items[i] = memalign(PAGE_SIZE, sizeof(struct ept_queue_item));
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}
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INIT_LIST_HEAD(&controller.gadget.ep_list);
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ep[0].ep.maxpacket = 64;
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ep[0].ep.name = "ep0";
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ep[0].desc = &ep0_in_desc;
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INIT_LIST_HEAD(&controller.gadget.ep0->ep_list);
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for (i = 0; i < 2 * NUM_ENDPOINTS; i++) {
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if (i != 0) {
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ep[i].ep.maxpacket = 512;
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ep[i].ep.name = "ep-";
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list_add_tail(&ep[i].ep.ep_list,
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&controller.gadget.ep_list);
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ep[i].desc = NULL;
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}
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ep[i].ep.ops = &mv_ep_ops;
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}
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return 0;
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}
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int usb_gadget_register_driver(struct usb_gadget_driver *driver)
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{
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struct mv_udc *udc = controller.udc;
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int retval;
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if (!driver
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|| driver->speed < USB_SPEED_FULL
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|| !driver->bind
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|| !driver->setup) {
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DBG("bad parameter.\n");
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return -EINVAL;
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}
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if (!mvudc_probe()) {
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usb_lowlevel_init();
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/* select ULPI phy */
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writel(PTS(PTS_ENABLE) | PFSC, &udc->portsc);
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}
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retval = driver->bind(&controller.gadget);
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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;
|
|
}
|