mirror of https://gitee.com/openkylin/linux.git
2719 lines
69 KiB
C
2719 lines
69 KiB
C
/*
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* Driver for PLX NET2272 USB device controller
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*
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* Copyright (C) 2005-2006 PLX Technology, Inc.
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* Copyright (C) 2006-2011 Analog Devices, Inc.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (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, MA 02111-1307 USA
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*/
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#include <linux/delay.h>
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#include <linux/device.h>
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#include <linux/errno.h>
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#include <linux/gpio.h>
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#include <linux/init.h>
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#include <linux/interrupt.h>
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#include <linux/io.h>
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#include <linux/ioport.h>
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#include <linux/kernel.h>
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#include <linux/list.h>
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#include <linux/module.h>
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#include <linux/moduleparam.h>
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#include <linux/pci.h>
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#include <linux/platform_device.h>
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#include <linux/prefetch.h>
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#include <linux/sched.h>
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#include <linux/slab.h>
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#include <linux/timer.h>
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#include <linux/usb.h>
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#include <linux/usb/ch9.h>
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#include <linux/usb/gadget.h>
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#include <asm/byteorder.h>
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#include <asm/system.h>
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#include <asm/unaligned.h>
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#include "net2272.h"
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#define DRIVER_DESC "PLX NET2272 USB Peripheral Controller"
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static const char driver_name[] = "net2272";
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static const char driver_vers[] = "2006 October 17/mainline";
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static const char driver_desc[] = DRIVER_DESC;
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static const char ep0name[] = "ep0";
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static const char * const ep_name[] = {
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ep0name,
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"ep-a", "ep-b", "ep-c",
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};
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#define DMA_ADDR_INVALID (~(dma_addr_t)0)
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#ifdef CONFIG_USB_GADGET_NET2272_DMA
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/*
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* use_dma: the NET2272 can use an external DMA controller.
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* Note that since there is no generic DMA api, some functions,
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* notably request_dma, start_dma, and cancel_dma will need to be
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* modified for your platform's particular dma controller.
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*
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* If use_dma is disabled, pio will be used instead.
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*/
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static int use_dma = 0;
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module_param(use_dma, bool, 0644);
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/*
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* dma_ep: selects the endpoint for use with dma (1=ep-a, 2=ep-b)
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* The NET2272 can only use dma for a single endpoint at a time.
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* At some point this could be modified to allow either endpoint
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* to take control of dma as it becomes available.
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*
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* Note that DMA should not be used on OUT endpoints unless it can
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* be guaranteed that no short packets will arrive on an IN endpoint
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* while the DMA operation is pending. Otherwise the OUT DMA will
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* terminate prematurely (See NET2272 Errata 630-0213-0101)
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*/
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static ushort dma_ep = 1;
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module_param(dma_ep, ushort, 0644);
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/*
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* dma_mode: net2272 dma mode setting (see LOCCTL1 definiton):
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* mode 0 == Slow DREQ mode
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* mode 1 == Fast DREQ mode
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* mode 2 == Burst mode
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*/
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static ushort dma_mode = 2;
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module_param(dma_mode, ushort, 0644);
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#else
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#define use_dma 0
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#define dma_ep 1
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#define dma_mode 2
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#endif
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/*
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* fifo_mode: net2272 buffer configuration:
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* mode 0 == ep-{a,b,c} 512db each
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* mode 1 == ep-a 1k, ep-{b,c} 512db
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* mode 2 == ep-a 1k, ep-b 1k, ep-c 512db
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* mode 3 == ep-a 1k, ep-b disabled, ep-c 512db
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*/
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static ushort fifo_mode = 0;
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module_param(fifo_mode, ushort, 0644);
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/*
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* enable_suspend: When enabled, the driver will respond to
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* USB suspend requests by powering down the NET2272. Otherwise,
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* USB suspend requests will be ignored. This is acceptible for
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* self-powered devices. For bus powered devices set this to 1.
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*/
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static ushort enable_suspend = 0;
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module_param(enable_suspend, ushort, 0644);
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static void assert_out_naking(struct net2272_ep *ep, const char *where)
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{
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u8 tmp;
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#ifndef DEBUG
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return;
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#endif
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tmp = net2272_ep_read(ep, EP_STAT0);
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if ((tmp & (1 << NAK_OUT_PACKETS)) == 0) {
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dev_dbg(ep->dev->dev, "%s %s %02x !NAK\n",
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ep->ep.name, where, tmp);
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net2272_ep_write(ep, EP_RSPSET, 1 << ALT_NAK_OUT_PACKETS);
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}
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}
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#define ASSERT_OUT_NAKING(ep) assert_out_naking(ep, __func__)
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static void stop_out_naking(struct net2272_ep *ep)
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{
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u8 tmp = net2272_ep_read(ep, EP_STAT0);
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if ((tmp & (1 << NAK_OUT_PACKETS)) != 0)
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net2272_ep_write(ep, EP_RSPCLR, 1 << ALT_NAK_OUT_PACKETS);
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}
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#define PIPEDIR(bAddress) (usb_pipein(bAddress) ? "in" : "out")
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static char *type_string(u8 bmAttributes)
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{
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switch ((bmAttributes) & USB_ENDPOINT_XFERTYPE_MASK) {
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case USB_ENDPOINT_XFER_BULK: return "bulk";
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case USB_ENDPOINT_XFER_ISOC: return "iso";
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case USB_ENDPOINT_XFER_INT: return "intr";
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default: return "control";
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}
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}
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static char *buf_state_string(unsigned state)
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{
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switch (state) {
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case BUFF_FREE: return "free";
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case BUFF_VALID: return "valid";
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case BUFF_LCL: return "local";
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case BUFF_USB: return "usb";
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default: return "unknown";
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}
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}
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static char *dma_mode_string(void)
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{
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if (!use_dma)
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return "PIO";
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switch (dma_mode) {
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case 0: return "SLOW DREQ";
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case 1: return "FAST DREQ";
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case 2: return "BURST";
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default: return "invalid";
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}
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}
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static void net2272_dequeue_all(struct net2272_ep *);
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static int net2272_kick_dma(struct net2272_ep *, struct net2272_request *);
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static int net2272_fifo_status(struct usb_ep *);
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static struct usb_ep_ops net2272_ep_ops;
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/*---------------------------------------------------------------------------*/
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static int
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net2272_enable(struct usb_ep *_ep, const struct usb_endpoint_descriptor *desc)
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{
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struct net2272 *dev;
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struct net2272_ep *ep;
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u32 max;
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u8 tmp;
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unsigned long flags;
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ep = container_of(_ep, struct net2272_ep, ep);
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if (!_ep || !desc || ep->desc || _ep->name == ep0name
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|| desc->bDescriptorType != USB_DT_ENDPOINT)
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return -EINVAL;
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dev = ep->dev;
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if (!dev->driver || dev->gadget.speed == USB_SPEED_UNKNOWN)
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return -ESHUTDOWN;
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max = usb_endpoint_maxp(desc) & 0x1fff;
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spin_lock_irqsave(&dev->lock, flags);
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_ep->maxpacket = max & 0x7fff;
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ep->desc = desc;
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/* net2272_ep_reset() has already been called */
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ep->stopped = 0;
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ep->wedged = 0;
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/* set speed-dependent max packet */
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net2272_ep_write(ep, EP_MAXPKT0, max & 0xff);
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net2272_ep_write(ep, EP_MAXPKT1, (max & 0xff00) >> 8);
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/* set type, direction, address; reset fifo counters */
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net2272_ep_write(ep, EP_STAT1, 1 << BUFFER_FLUSH);
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tmp = usb_endpoint_type(desc);
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if (usb_endpoint_xfer_bulk(desc)) {
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/* catch some particularly blatant driver bugs */
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if ((dev->gadget.speed == USB_SPEED_HIGH && max != 512) ||
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(dev->gadget.speed == USB_SPEED_FULL && max > 64)) {
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spin_unlock_irqrestore(&dev->lock, flags);
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return -ERANGE;
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}
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}
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ep->is_iso = usb_endpoint_xfer_isoc(desc) ? 1 : 0;
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tmp <<= ENDPOINT_TYPE;
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tmp |= ((desc->bEndpointAddress & 0x0f) << ENDPOINT_NUMBER);
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tmp |= usb_endpoint_dir_in(desc) << ENDPOINT_DIRECTION;
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tmp |= (1 << ENDPOINT_ENABLE);
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/* for OUT transfers, block the rx fifo until a read is posted */
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ep->is_in = usb_endpoint_dir_in(desc);
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if (!ep->is_in)
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net2272_ep_write(ep, EP_RSPSET, 1 << ALT_NAK_OUT_PACKETS);
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net2272_ep_write(ep, EP_CFG, tmp);
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/* enable irqs */
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tmp = (1 << ep->num) | net2272_read(dev, IRQENB0);
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net2272_write(dev, IRQENB0, tmp);
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tmp = (1 << DATA_PACKET_RECEIVED_INTERRUPT_ENABLE)
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| (1 << DATA_PACKET_TRANSMITTED_INTERRUPT_ENABLE)
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| net2272_ep_read(ep, EP_IRQENB);
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net2272_ep_write(ep, EP_IRQENB, tmp);
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tmp = desc->bEndpointAddress;
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dev_dbg(dev->dev, "enabled %s (ep%d%s-%s) max %04x cfg %02x\n",
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_ep->name, tmp & 0x0f, PIPEDIR(tmp),
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type_string(desc->bmAttributes), max,
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net2272_ep_read(ep, EP_CFG));
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spin_unlock_irqrestore(&dev->lock, flags);
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return 0;
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}
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static void net2272_ep_reset(struct net2272_ep *ep)
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{
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u8 tmp;
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ep->desc = NULL;
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INIT_LIST_HEAD(&ep->queue);
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ep->ep.maxpacket = ~0;
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ep->ep.ops = &net2272_ep_ops;
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/* disable irqs, endpoint */
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net2272_ep_write(ep, EP_IRQENB, 0);
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/* init to our chosen defaults, notably so that we NAK OUT
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* packets until the driver queues a read.
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*/
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tmp = (1 << NAK_OUT_PACKETS_MODE) | (1 << ALT_NAK_OUT_PACKETS);
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net2272_ep_write(ep, EP_RSPSET, tmp);
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tmp = (1 << INTERRUPT_MODE) | (1 << HIDE_STATUS_PHASE);
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if (ep->num != 0)
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tmp |= (1 << ENDPOINT_TOGGLE) | (1 << ENDPOINT_HALT);
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net2272_ep_write(ep, EP_RSPCLR, tmp);
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/* scrub most status bits, and flush any fifo state */
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net2272_ep_write(ep, EP_STAT0,
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(1 << DATA_IN_TOKEN_INTERRUPT)
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| (1 << DATA_OUT_TOKEN_INTERRUPT)
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| (1 << DATA_PACKET_TRANSMITTED_INTERRUPT)
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| (1 << DATA_PACKET_RECEIVED_INTERRUPT)
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| (1 << SHORT_PACKET_TRANSFERRED_INTERRUPT));
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net2272_ep_write(ep, EP_STAT1,
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(1 << TIMEOUT)
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| (1 << USB_OUT_ACK_SENT)
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| (1 << USB_OUT_NAK_SENT)
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| (1 << USB_IN_ACK_RCVD)
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| (1 << USB_IN_NAK_SENT)
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| (1 << USB_STALL_SENT)
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| (1 << LOCAL_OUT_ZLP)
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| (1 << BUFFER_FLUSH));
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/* fifo size is handled seperately */
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}
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static int net2272_disable(struct usb_ep *_ep)
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{
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struct net2272_ep *ep;
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unsigned long flags;
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ep = container_of(_ep, struct net2272_ep, ep);
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if (!_ep || !ep->desc || _ep->name == ep0name)
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return -EINVAL;
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spin_lock_irqsave(&ep->dev->lock, flags);
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net2272_dequeue_all(ep);
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net2272_ep_reset(ep);
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dev_vdbg(ep->dev->dev, "disabled %s\n", _ep->name);
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spin_unlock_irqrestore(&ep->dev->lock, flags);
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return 0;
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}
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/*---------------------------------------------------------------------------*/
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static struct usb_request *
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net2272_alloc_request(struct usb_ep *_ep, gfp_t gfp_flags)
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{
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struct net2272_ep *ep;
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struct net2272_request *req;
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if (!_ep)
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return NULL;
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ep = container_of(_ep, struct net2272_ep, ep);
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req = kzalloc(sizeof(*req), gfp_flags);
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if (!req)
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return NULL;
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req->req.dma = DMA_ADDR_INVALID;
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INIT_LIST_HEAD(&req->queue);
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return &req->req;
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}
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static void
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net2272_free_request(struct usb_ep *_ep, struct usb_request *_req)
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{
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struct net2272_ep *ep;
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struct net2272_request *req;
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ep = container_of(_ep, struct net2272_ep, ep);
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if (!_ep || !_req)
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return;
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req = container_of(_req, struct net2272_request, req);
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WARN_ON(!list_empty(&req->queue));
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kfree(req);
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}
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static void
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net2272_done(struct net2272_ep *ep, struct net2272_request *req, int status)
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{
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struct net2272 *dev;
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unsigned stopped = ep->stopped;
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if (ep->num == 0) {
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if (ep->dev->protocol_stall) {
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ep->stopped = 1;
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set_halt(ep);
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}
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allow_status(ep);
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}
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list_del_init(&req->queue);
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if (req->req.status == -EINPROGRESS)
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req->req.status = status;
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else
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status = req->req.status;
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dev = ep->dev;
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if (use_dma && req->mapped) {
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dma_unmap_single(dev->dev, req->req.dma, req->req.length,
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ep->is_in ? DMA_TO_DEVICE : DMA_FROM_DEVICE);
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req->req.dma = DMA_ADDR_INVALID;
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req->mapped = 0;
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}
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if (status && status != -ESHUTDOWN)
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dev_vdbg(dev->dev, "complete %s req %p stat %d len %u/%u buf %p\n",
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ep->ep.name, &req->req, status,
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req->req.actual, req->req.length, req->req.buf);
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/* don't modify queue heads during completion callback */
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ep->stopped = 1;
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spin_unlock(&dev->lock);
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req->req.complete(&ep->ep, &req->req);
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spin_lock(&dev->lock);
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ep->stopped = stopped;
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}
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static int
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net2272_write_packet(struct net2272_ep *ep, u8 *buf,
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struct net2272_request *req, unsigned max)
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{
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u16 __iomem *ep_data = net2272_reg_addr(ep->dev, EP_DATA);
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u16 *bufp;
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unsigned length, count;
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u8 tmp;
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length = min(req->req.length - req->req.actual, max);
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req->req.actual += length;
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dev_vdbg(ep->dev->dev, "write packet %s req %p max %u len %u avail %u\n",
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ep->ep.name, req, max, length,
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(net2272_ep_read(ep, EP_AVAIL1) << 8) | net2272_ep_read(ep, EP_AVAIL0));
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count = length;
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bufp = (u16 *)buf;
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while (likely(count >= 2)) {
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/* no byte-swap required; chip endian set during init */
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writew(*bufp++, ep_data);
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count -= 2;
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}
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buf = (u8 *)bufp;
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/* write final byte by placing the NET2272 into 8-bit mode */
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if (unlikely(count)) {
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tmp = net2272_read(ep->dev, LOCCTL);
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net2272_write(ep->dev, LOCCTL, tmp & ~(1 << DATA_WIDTH));
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writeb(*buf, ep_data);
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net2272_write(ep->dev, LOCCTL, tmp);
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}
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return length;
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}
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/* returns: 0: still running, 1: completed, negative: errno */
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static int
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net2272_write_fifo(struct net2272_ep *ep, struct net2272_request *req)
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{
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u8 *buf;
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unsigned count, max;
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int status;
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dev_vdbg(ep->dev->dev, "write_fifo %s actual %d len %d\n",
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ep->ep.name, req->req.actual, req->req.length);
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/*
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* Keep loading the endpoint until the final packet is loaded,
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* or the endpoint buffer is full.
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*/
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top:
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/*
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* Clear interrupt status
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* - Packet Transmitted interrupt will become set again when the
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* host successfully takes another packet
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*/
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net2272_ep_write(ep, EP_STAT0, (1 << DATA_PACKET_TRANSMITTED_INTERRUPT));
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while (!(net2272_ep_read(ep, EP_STAT0) & (1 << BUFFER_FULL))) {
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buf = req->req.buf + req->req.actual;
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prefetch(buf);
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/* force pagesel */
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net2272_ep_read(ep, EP_STAT0);
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max = (net2272_ep_read(ep, EP_AVAIL1) << 8) |
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(net2272_ep_read(ep, EP_AVAIL0));
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if (max < ep->ep.maxpacket)
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max = (net2272_ep_read(ep, EP_AVAIL1) << 8)
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| (net2272_ep_read(ep, EP_AVAIL0));
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count = net2272_write_packet(ep, buf, req, max);
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/* see if we are done */
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if (req->req.length == req->req.actual) {
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/* validate short or zlp packet */
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if (count < ep->ep.maxpacket)
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set_fifo_bytecount(ep, 0);
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net2272_done(ep, req, 0);
|
|
|
|
if (!list_empty(&ep->queue)) {
|
|
req = list_entry(ep->queue.next,
|
|
struct net2272_request,
|
|
queue);
|
|
status = net2272_kick_dma(ep, req);
|
|
|
|
if (status < 0)
|
|
if ((net2272_ep_read(ep, EP_STAT0)
|
|
& (1 << BUFFER_EMPTY)))
|
|
goto top;
|
|
}
|
|
return 1;
|
|
}
|
|
net2272_ep_write(ep, EP_STAT0, (1 << DATA_PACKET_TRANSMITTED_INTERRUPT));
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static void
|
|
net2272_out_flush(struct net2272_ep *ep)
|
|
{
|
|
ASSERT_OUT_NAKING(ep);
|
|
|
|
net2272_ep_write(ep, EP_STAT0, (1 << DATA_OUT_TOKEN_INTERRUPT)
|
|
| (1 << DATA_PACKET_RECEIVED_INTERRUPT));
|
|
net2272_ep_write(ep, EP_STAT1, 1 << BUFFER_FLUSH);
|
|
}
|
|
|
|
static int
|
|
net2272_read_packet(struct net2272_ep *ep, u8 *buf,
|
|
struct net2272_request *req, unsigned avail)
|
|
{
|
|
u16 __iomem *ep_data = net2272_reg_addr(ep->dev, EP_DATA);
|
|
unsigned is_short;
|
|
u16 *bufp;
|
|
|
|
req->req.actual += avail;
|
|
|
|
dev_vdbg(ep->dev->dev, "read packet %s req %p len %u avail %u\n",
|
|
ep->ep.name, req, avail,
|
|
(net2272_ep_read(ep, EP_AVAIL1) << 8) | net2272_ep_read(ep, EP_AVAIL0));
|
|
|
|
is_short = (avail < ep->ep.maxpacket);
|
|
|
|
if (unlikely(avail == 0)) {
|
|
/* remove any zlp from the buffer */
|
|
(void)readw(ep_data);
|
|
return is_short;
|
|
}
|
|
|
|
/* Ensure we get the final byte */
|
|
if (unlikely(avail % 2))
|
|
avail++;
|
|
bufp = (u16 *)buf;
|
|
|
|
do {
|
|
*bufp++ = readw(ep_data);
|
|
avail -= 2;
|
|
} while (avail);
|
|
|
|
/*
|
|
* To avoid false endpoint available race condition must read
|
|
* ep stat0 twice in the case of a short transfer
|
|
*/
|
|
if (net2272_ep_read(ep, EP_STAT0) & (1 << SHORT_PACKET_TRANSFERRED_INTERRUPT))
|
|
net2272_ep_read(ep, EP_STAT0);
|
|
|
|
return is_short;
|
|
}
|
|
|
|
static int
|
|
net2272_read_fifo(struct net2272_ep *ep, struct net2272_request *req)
|
|
{
|
|
u8 *buf;
|
|
unsigned is_short;
|
|
int count;
|
|
int tmp;
|
|
int cleanup = 0;
|
|
int status = -1;
|
|
|
|
dev_vdbg(ep->dev->dev, "read_fifo %s actual %d len %d\n",
|
|
ep->ep.name, req->req.actual, req->req.length);
|
|
|
|
top:
|
|
do {
|
|
buf = req->req.buf + req->req.actual;
|
|
prefetchw(buf);
|
|
|
|
count = (net2272_ep_read(ep, EP_AVAIL1) << 8)
|
|
| net2272_ep_read(ep, EP_AVAIL0);
|
|
|
|
net2272_ep_write(ep, EP_STAT0,
|
|
(1 << SHORT_PACKET_TRANSFERRED_INTERRUPT) |
|
|
(1 << DATA_PACKET_RECEIVED_INTERRUPT));
|
|
|
|
tmp = req->req.length - req->req.actual;
|
|
|
|
if (count > tmp) {
|
|
if ((tmp % ep->ep.maxpacket) != 0) {
|
|
dev_err(ep->dev->dev,
|
|
"%s out fifo %d bytes, expected %d\n",
|
|
ep->ep.name, count, tmp);
|
|
cleanup = 1;
|
|
}
|
|
count = (tmp > 0) ? tmp : 0;
|
|
}
|
|
|
|
is_short = net2272_read_packet(ep, buf, req, count);
|
|
|
|
/* completion */
|
|
if (unlikely(cleanup || is_short ||
|
|
((req->req.actual == req->req.length)
|
|
&& !req->req.zero))) {
|
|
|
|
if (cleanup) {
|
|
net2272_out_flush(ep);
|
|
net2272_done(ep, req, -EOVERFLOW);
|
|
} else
|
|
net2272_done(ep, req, 0);
|
|
|
|
/* re-initialize endpoint transfer registers
|
|
* otherwise they may result in erroneous pre-validation
|
|
* for subsequent control reads
|
|
*/
|
|
if (unlikely(ep->num == 0)) {
|
|
net2272_ep_write(ep, EP_TRANSFER2, 0);
|
|
net2272_ep_write(ep, EP_TRANSFER1, 0);
|
|
net2272_ep_write(ep, EP_TRANSFER0, 0);
|
|
}
|
|
|
|
if (!list_empty(&ep->queue)) {
|
|
req = list_entry(ep->queue.next,
|
|
struct net2272_request, queue);
|
|
status = net2272_kick_dma(ep, req);
|
|
if ((status < 0) &&
|
|
!(net2272_ep_read(ep, EP_STAT0) & (1 << BUFFER_EMPTY)))
|
|
goto top;
|
|
}
|
|
return 1;
|
|
}
|
|
} while (!(net2272_ep_read(ep, EP_STAT0) & (1 << BUFFER_EMPTY)));
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void
|
|
net2272_pio_advance(struct net2272_ep *ep)
|
|
{
|
|
struct net2272_request *req;
|
|
|
|
if (unlikely(list_empty(&ep->queue)))
|
|
return;
|
|
|
|
req = list_entry(ep->queue.next, struct net2272_request, queue);
|
|
(ep->is_in ? net2272_write_fifo : net2272_read_fifo)(ep, req);
|
|
}
|
|
|
|
/* returns 0 on success, else negative errno */
|
|
static int
|
|
net2272_request_dma(struct net2272 *dev, unsigned ep, u32 buf,
|
|
unsigned len, unsigned dir)
|
|
{
|
|
dev_vdbg(dev->dev, "request_dma ep %d buf %08x len %d dir %d\n",
|
|
ep, buf, len, dir);
|
|
|
|
/* The NET2272 only supports a single dma channel */
|
|
if (dev->dma_busy)
|
|
return -EBUSY;
|
|
/*
|
|
* EP_TRANSFER (used to determine the number of bytes received
|
|
* in an OUT transfer) is 24 bits wide; don't ask for more than that.
|
|
*/
|
|
if ((dir == 1) && (len > 0x1000000))
|
|
return -EINVAL;
|
|
|
|
dev->dma_busy = 1;
|
|
|
|
/* initialize platform's dma */
|
|
#ifdef CONFIG_PCI
|
|
/* NET2272 addr, buffer addr, length, etc. */
|
|
switch (dev->dev_id) {
|
|
case PCI_DEVICE_ID_RDK1:
|
|
/* Setup PLX 9054 DMA mode */
|
|
writel((1 << LOCAL_BUS_WIDTH) |
|
|
(1 << TA_READY_INPUT_ENABLE) |
|
|
(0 << LOCAL_BURST_ENABLE) |
|
|
(1 << DONE_INTERRUPT_ENABLE) |
|
|
(1 << LOCAL_ADDRESSING_MODE) |
|
|
(1 << DEMAND_MODE) |
|
|
(1 << DMA_EOT_ENABLE) |
|
|
(1 << FAST_SLOW_TERMINATE_MODE_SELECT) |
|
|
(1 << DMA_CHANNEL_INTERRUPT_SELECT),
|
|
dev->rdk1.plx9054_base_addr + DMAMODE0);
|
|
|
|
writel(0x100000, dev->rdk1.plx9054_base_addr + DMALADR0);
|
|
writel(buf, dev->rdk1.plx9054_base_addr + DMAPADR0);
|
|
writel(len, dev->rdk1.plx9054_base_addr + DMASIZ0);
|
|
writel((dir << DIRECTION_OF_TRANSFER) |
|
|
(1 << INTERRUPT_AFTER_TERMINAL_COUNT),
|
|
dev->rdk1.plx9054_base_addr + DMADPR0);
|
|
writel((1 << LOCAL_DMA_CHANNEL_0_INTERRUPT_ENABLE) |
|
|
readl(dev->rdk1.plx9054_base_addr + INTCSR),
|
|
dev->rdk1.plx9054_base_addr + INTCSR);
|
|
|
|
break;
|
|
}
|
|
#endif
|
|
|
|
net2272_write(dev, DMAREQ,
|
|
(0 << DMA_BUFFER_VALID) |
|
|
(1 << DMA_REQUEST_ENABLE) |
|
|
(1 << DMA_CONTROL_DACK) |
|
|
(dev->dma_eot_polarity << EOT_POLARITY) |
|
|
(dev->dma_dack_polarity << DACK_POLARITY) |
|
|
(dev->dma_dreq_polarity << DREQ_POLARITY) |
|
|
((ep >> 1) << DMA_ENDPOINT_SELECT));
|
|
|
|
(void) net2272_read(dev, SCRATCH);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void
|
|
net2272_start_dma(struct net2272 *dev)
|
|
{
|
|
/* start platform's dma controller */
|
|
#ifdef CONFIG_PCI
|
|
switch (dev->dev_id) {
|
|
case PCI_DEVICE_ID_RDK1:
|
|
writeb((1 << CHANNEL_ENABLE) | (1 << CHANNEL_START),
|
|
dev->rdk1.plx9054_base_addr + DMACSR0);
|
|
break;
|
|
}
|
|
#endif
|
|
}
|
|
|
|
/* returns 0 on success, else negative errno */
|
|
static int
|
|
net2272_kick_dma(struct net2272_ep *ep, struct net2272_request *req)
|
|
{
|
|
unsigned size;
|
|
u8 tmp;
|
|
|
|
if (!use_dma || (ep->num < 1) || (ep->num > 2) || !ep->dma)
|
|
return -EINVAL;
|
|
|
|
/* don't use dma for odd-length transfers
|
|
* otherwise, we'd need to deal with the last byte with pio
|
|
*/
|
|
if (req->req.length & 1)
|
|
return -EINVAL;
|
|
|
|
dev_vdbg(ep->dev->dev, "kick_dma %s req %p dma %08llx\n",
|
|
ep->ep.name, req, (unsigned long long) req->req.dma);
|
|
|
|
net2272_ep_write(ep, EP_RSPSET, 1 << ALT_NAK_OUT_PACKETS);
|
|
|
|
/* The NET2272 can only use DMA on one endpoint at a time */
|
|
if (ep->dev->dma_busy)
|
|
return -EBUSY;
|
|
|
|
/* Make sure we only DMA an even number of bytes (we'll use
|
|
* pio to complete the transfer)
|
|
*/
|
|
size = req->req.length;
|
|
size &= ~1;
|
|
|
|
/* device-to-host transfer */
|
|
if (ep->is_in) {
|
|
/* initialize platform's dma controller */
|
|
if (net2272_request_dma(ep->dev, ep->num, req->req.dma, size, 0))
|
|
/* unable to obtain DMA channel; return error and use pio mode */
|
|
return -EBUSY;
|
|
req->req.actual += size;
|
|
|
|
/* host-to-device transfer */
|
|
} else {
|
|
tmp = net2272_ep_read(ep, EP_STAT0);
|
|
|
|
/* initialize platform's dma controller */
|
|
if (net2272_request_dma(ep->dev, ep->num, req->req.dma, size, 1))
|
|
/* unable to obtain DMA channel; return error and use pio mode */
|
|
return -EBUSY;
|
|
|
|
if (!(tmp & (1 << BUFFER_EMPTY)))
|
|
ep->not_empty = 1;
|
|
else
|
|
ep->not_empty = 0;
|
|
|
|
|
|
/* allow the endpoint's buffer to fill */
|
|
net2272_ep_write(ep, EP_RSPCLR, 1 << ALT_NAK_OUT_PACKETS);
|
|
|
|
/* this transfer completed and data's already in the fifo
|
|
* return error so pio gets used.
|
|
*/
|
|
if (tmp & (1 << SHORT_PACKET_TRANSFERRED_INTERRUPT)) {
|
|
|
|
/* deassert dreq */
|
|
net2272_write(ep->dev, DMAREQ,
|
|
(0 << DMA_BUFFER_VALID) |
|
|
(0 << DMA_REQUEST_ENABLE) |
|
|
(1 << DMA_CONTROL_DACK) |
|
|
(ep->dev->dma_eot_polarity << EOT_POLARITY) |
|
|
(ep->dev->dma_dack_polarity << DACK_POLARITY) |
|
|
(ep->dev->dma_dreq_polarity << DREQ_POLARITY) |
|
|
((ep->num >> 1) << DMA_ENDPOINT_SELECT));
|
|
|
|
return -EBUSY;
|
|
}
|
|
}
|
|
|
|
/* Don't use per-packet interrupts: use dma interrupts only */
|
|
net2272_ep_write(ep, EP_IRQENB, 0);
|
|
|
|
net2272_start_dma(ep->dev);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void net2272_cancel_dma(struct net2272 *dev)
|
|
{
|
|
#ifdef CONFIG_PCI
|
|
switch (dev->dev_id) {
|
|
case PCI_DEVICE_ID_RDK1:
|
|
writeb(0, dev->rdk1.plx9054_base_addr + DMACSR0);
|
|
writeb(1 << CHANNEL_ABORT, dev->rdk1.plx9054_base_addr + DMACSR0);
|
|
while (!(readb(dev->rdk1.plx9054_base_addr + DMACSR0) &
|
|
(1 << CHANNEL_DONE)))
|
|
continue; /* wait for dma to stabalize */
|
|
|
|
/* dma abort generates an interrupt */
|
|
writeb(1 << CHANNEL_CLEAR_INTERRUPT,
|
|
dev->rdk1.plx9054_base_addr + DMACSR0);
|
|
break;
|
|
}
|
|
#endif
|
|
|
|
dev->dma_busy = 0;
|
|
}
|
|
|
|
/*---------------------------------------------------------------------------*/
|
|
|
|
static int
|
|
net2272_queue(struct usb_ep *_ep, struct usb_request *_req, gfp_t gfp_flags)
|
|
{
|
|
struct net2272_request *req;
|
|
struct net2272_ep *ep;
|
|
struct net2272 *dev;
|
|
unsigned long flags;
|
|
int status = -1;
|
|
u8 s;
|
|
|
|
req = container_of(_req, struct net2272_request, req);
|
|
if (!_req || !_req->complete || !_req->buf
|
|
|| !list_empty(&req->queue))
|
|
return -EINVAL;
|
|
ep = container_of(_ep, struct net2272_ep, ep);
|
|
if (!_ep || (!ep->desc && ep->num != 0))
|
|
return -EINVAL;
|
|
dev = ep->dev;
|
|
if (!dev->driver || dev->gadget.speed == USB_SPEED_UNKNOWN)
|
|
return -ESHUTDOWN;
|
|
|
|
/* set up dma mapping in case the caller didn't */
|
|
if (use_dma && ep->dma && _req->dma == DMA_ADDR_INVALID) {
|
|
_req->dma = dma_map_single(dev->dev, _req->buf, _req->length,
|
|
ep->is_in ? DMA_TO_DEVICE : DMA_FROM_DEVICE);
|
|
req->mapped = 1;
|
|
}
|
|
|
|
dev_vdbg(dev->dev, "%s queue req %p, len %d buf %p dma %08llx %s\n",
|
|
_ep->name, _req, _req->length, _req->buf,
|
|
(unsigned long long) _req->dma, _req->zero ? "zero" : "!zero");
|
|
|
|
spin_lock_irqsave(&dev->lock, flags);
|
|
|
|
_req->status = -EINPROGRESS;
|
|
_req->actual = 0;
|
|
|
|
/* kickstart this i/o queue? */
|
|
if (list_empty(&ep->queue) && !ep->stopped) {
|
|
/* maybe there's no control data, just status ack */
|
|
if (ep->num == 0 && _req->length == 0) {
|
|
net2272_done(ep, req, 0);
|
|
dev_vdbg(dev->dev, "%s status ack\n", ep->ep.name);
|
|
goto done;
|
|
}
|
|
|
|
/* Return zlp, don't let it block subsequent packets */
|
|
s = net2272_ep_read(ep, EP_STAT0);
|
|
if (s & (1 << BUFFER_EMPTY)) {
|
|
/* Buffer is empty check for a blocking zlp, handle it */
|
|
if ((s & (1 << NAK_OUT_PACKETS)) &&
|
|
net2272_ep_read(ep, EP_STAT1) & (1 << LOCAL_OUT_ZLP)) {
|
|
dev_dbg(dev->dev, "WARNING: returning ZLP short packet termination!\n");
|
|
/*
|
|
* Request is going to terminate with a short packet ...
|
|
* hope the client is ready for it!
|
|
*/
|
|
status = net2272_read_fifo(ep, req);
|
|
/* clear short packet naking */
|
|
net2272_ep_write(ep, EP_STAT0, (1 << NAK_OUT_PACKETS));
|
|
goto done;
|
|
}
|
|
}
|
|
|
|
/* try dma first */
|
|
status = net2272_kick_dma(ep, req);
|
|
|
|
if (status < 0) {
|
|
/* dma failed (most likely in use by another endpoint)
|
|
* fallback to pio
|
|
*/
|
|
status = 0;
|
|
|
|
if (ep->is_in)
|
|
status = net2272_write_fifo(ep, req);
|
|
else {
|
|
s = net2272_ep_read(ep, EP_STAT0);
|
|
if ((s & (1 << BUFFER_EMPTY)) == 0)
|
|
status = net2272_read_fifo(ep, req);
|
|
}
|
|
|
|
if (unlikely(status != 0)) {
|
|
if (status > 0)
|
|
status = 0;
|
|
req = NULL;
|
|
}
|
|
}
|
|
}
|
|
if (likely(req != 0))
|
|
list_add_tail(&req->queue, &ep->queue);
|
|
|
|
if (likely(!list_empty(&ep->queue)))
|
|
net2272_ep_write(ep, EP_RSPCLR, 1 << ALT_NAK_OUT_PACKETS);
|
|
done:
|
|
spin_unlock_irqrestore(&dev->lock, flags);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* dequeue ALL requests */
|
|
static void
|
|
net2272_dequeue_all(struct net2272_ep *ep)
|
|
{
|
|
struct net2272_request *req;
|
|
|
|
/* called with spinlock held */
|
|
ep->stopped = 1;
|
|
|
|
while (!list_empty(&ep->queue)) {
|
|
req = list_entry(ep->queue.next,
|
|
struct net2272_request,
|
|
queue);
|
|
net2272_done(ep, req, -ESHUTDOWN);
|
|
}
|
|
}
|
|
|
|
/* dequeue JUST ONE request */
|
|
static int
|
|
net2272_dequeue(struct usb_ep *_ep, struct usb_request *_req)
|
|
{
|
|
struct net2272_ep *ep;
|
|
struct net2272_request *req;
|
|
unsigned long flags;
|
|
int stopped;
|
|
|
|
ep = container_of(_ep, struct net2272_ep, ep);
|
|
if (!_ep || (!ep->desc && ep->num != 0) || !_req)
|
|
return -EINVAL;
|
|
|
|
spin_lock_irqsave(&ep->dev->lock, flags);
|
|
stopped = ep->stopped;
|
|
ep->stopped = 1;
|
|
|
|
/* make sure it's still queued on this endpoint */
|
|
list_for_each_entry(req, &ep->queue, queue) {
|
|
if (&req->req == _req)
|
|
break;
|
|
}
|
|
if (&req->req != _req) {
|
|
spin_unlock_irqrestore(&ep->dev->lock, flags);
|
|
return -EINVAL;
|
|
}
|
|
|
|
/* queue head may be partially complete */
|
|
if (ep->queue.next == &req->queue) {
|
|
dev_dbg(ep->dev->dev, "unlink (%s) pio\n", _ep->name);
|
|
net2272_done(ep, req, -ECONNRESET);
|
|
}
|
|
req = NULL;
|
|
ep->stopped = stopped;
|
|
|
|
spin_unlock_irqrestore(&ep->dev->lock, flags);
|
|
return 0;
|
|
}
|
|
|
|
/*---------------------------------------------------------------------------*/
|
|
|
|
static int
|
|
net2272_set_halt_and_wedge(struct usb_ep *_ep, int value, int wedged)
|
|
{
|
|
struct net2272_ep *ep;
|
|
unsigned long flags;
|
|
int ret = 0;
|
|
|
|
ep = container_of(_ep, struct net2272_ep, ep);
|
|
if (!_ep || (!ep->desc && ep->num != 0))
|
|
return -EINVAL;
|
|
if (!ep->dev->driver || ep->dev->gadget.speed == USB_SPEED_UNKNOWN)
|
|
return -ESHUTDOWN;
|
|
if (ep->desc /* not ep0 */ && usb_endpoint_xfer_isoc(ep->desc))
|
|
return -EINVAL;
|
|
|
|
spin_lock_irqsave(&ep->dev->lock, flags);
|
|
if (!list_empty(&ep->queue))
|
|
ret = -EAGAIN;
|
|
else if (ep->is_in && value && net2272_fifo_status(_ep) != 0)
|
|
ret = -EAGAIN;
|
|
else {
|
|
dev_vdbg(ep->dev->dev, "%s %s %s\n", _ep->name,
|
|
value ? "set" : "clear",
|
|
wedged ? "wedge" : "halt");
|
|
/* set/clear */
|
|
if (value) {
|
|
if (ep->num == 0)
|
|
ep->dev->protocol_stall = 1;
|
|
else
|
|
set_halt(ep);
|
|
if (wedged)
|
|
ep->wedged = 1;
|
|
} else {
|
|
clear_halt(ep);
|
|
ep->wedged = 0;
|
|
}
|
|
}
|
|
spin_unlock_irqrestore(&ep->dev->lock, flags);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int
|
|
net2272_set_halt(struct usb_ep *_ep, int value)
|
|
{
|
|
return net2272_set_halt_and_wedge(_ep, value, 0);
|
|
}
|
|
|
|
static int
|
|
net2272_set_wedge(struct usb_ep *_ep)
|
|
{
|
|
if (!_ep || _ep->name == ep0name)
|
|
return -EINVAL;
|
|
return net2272_set_halt_and_wedge(_ep, 1, 1);
|
|
}
|
|
|
|
static int
|
|
net2272_fifo_status(struct usb_ep *_ep)
|
|
{
|
|
struct net2272_ep *ep;
|
|
u16 avail;
|
|
|
|
ep = container_of(_ep, struct net2272_ep, ep);
|
|
if (!_ep || (!ep->desc && ep->num != 0))
|
|
return -ENODEV;
|
|
if (!ep->dev->driver || ep->dev->gadget.speed == USB_SPEED_UNKNOWN)
|
|
return -ESHUTDOWN;
|
|
|
|
avail = net2272_ep_read(ep, EP_AVAIL1) << 8;
|
|
avail |= net2272_ep_read(ep, EP_AVAIL0);
|
|
if (avail > ep->fifo_size)
|
|
return -EOVERFLOW;
|
|
if (ep->is_in)
|
|
avail = ep->fifo_size - avail;
|
|
return avail;
|
|
}
|
|
|
|
static void
|
|
net2272_fifo_flush(struct usb_ep *_ep)
|
|
{
|
|
struct net2272_ep *ep;
|
|
|
|
ep = container_of(_ep, struct net2272_ep, ep);
|
|
if (!_ep || (!ep->desc && ep->num != 0))
|
|
return;
|
|
if (!ep->dev->driver || ep->dev->gadget.speed == USB_SPEED_UNKNOWN)
|
|
return;
|
|
|
|
net2272_ep_write(ep, EP_STAT1, 1 << BUFFER_FLUSH);
|
|
}
|
|
|
|
static struct usb_ep_ops net2272_ep_ops = {
|
|
.enable = net2272_enable,
|
|
.disable = net2272_disable,
|
|
|
|
.alloc_request = net2272_alloc_request,
|
|
.free_request = net2272_free_request,
|
|
|
|
.queue = net2272_queue,
|
|
.dequeue = net2272_dequeue,
|
|
|
|
.set_halt = net2272_set_halt,
|
|
.set_wedge = net2272_set_wedge,
|
|
.fifo_status = net2272_fifo_status,
|
|
.fifo_flush = net2272_fifo_flush,
|
|
};
|
|
|
|
/*---------------------------------------------------------------------------*/
|
|
|
|
static int
|
|
net2272_get_frame(struct usb_gadget *_gadget)
|
|
{
|
|
struct net2272 *dev;
|
|
unsigned long flags;
|
|
u16 ret;
|
|
|
|
if (!_gadget)
|
|
return -ENODEV;
|
|
dev = container_of(_gadget, struct net2272, gadget);
|
|
spin_lock_irqsave(&dev->lock, flags);
|
|
|
|
ret = net2272_read(dev, FRAME1) << 8;
|
|
ret |= net2272_read(dev, FRAME0);
|
|
|
|
spin_unlock_irqrestore(&dev->lock, flags);
|
|
return ret;
|
|
}
|
|
|
|
static int
|
|
net2272_wakeup(struct usb_gadget *_gadget)
|
|
{
|
|
struct net2272 *dev;
|
|
u8 tmp;
|
|
unsigned long flags;
|
|
|
|
if (!_gadget)
|
|
return 0;
|
|
dev = container_of(_gadget, struct net2272, gadget);
|
|
|
|
spin_lock_irqsave(&dev->lock, flags);
|
|
tmp = net2272_read(dev, USBCTL0);
|
|
if (tmp & (1 << IO_WAKEUP_ENABLE))
|
|
net2272_write(dev, USBCTL1, (1 << GENERATE_RESUME));
|
|
|
|
spin_unlock_irqrestore(&dev->lock, flags);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
net2272_set_selfpowered(struct usb_gadget *_gadget, int value)
|
|
{
|
|
struct net2272 *dev;
|
|
|
|
if (!_gadget)
|
|
return -ENODEV;
|
|
dev = container_of(_gadget, struct net2272, gadget);
|
|
|
|
dev->is_selfpowered = value;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
net2272_pullup(struct usb_gadget *_gadget, int is_on)
|
|
{
|
|
struct net2272 *dev;
|
|
u8 tmp;
|
|
unsigned long flags;
|
|
|
|
if (!_gadget)
|
|
return -ENODEV;
|
|
dev = container_of(_gadget, struct net2272, gadget);
|
|
|
|
spin_lock_irqsave(&dev->lock, flags);
|
|
tmp = net2272_read(dev, USBCTL0);
|
|
dev->softconnect = (is_on != 0);
|
|
if (is_on)
|
|
tmp |= (1 << USB_DETECT_ENABLE);
|
|
else
|
|
tmp &= ~(1 << USB_DETECT_ENABLE);
|
|
net2272_write(dev, USBCTL0, tmp);
|
|
spin_unlock_irqrestore(&dev->lock, flags);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int net2272_start(struct usb_gadget *_gadget,
|
|
struct usb_gadget_driver *driver);
|
|
static int net2272_stop(struct usb_gadget *_gadget,
|
|
struct usb_gadget_driver *driver);
|
|
|
|
static const struct usb_gadget_ops net2272_ops = {
|
|
.get_frame = net2272_get_frame,
|
|
.wakeup = net2272_wakeup,
|
|
.set_selfpowered = net2272_set_selfpowered,
|
|
.pullup = net2272_pullup,
|
|
.udc_start = net2272_start,
|
|
.udc_stop = net2272_stop,
|
|
};
|
|
|
|
/*---------------------------------------------------------------------------*/
|
|
|
|
static ssize_t
|
|
net2272_show_registers(struct device *_dev, struct device_attribute *attr, char *buf)
|
|
{
|
|
struct net2272 *dev;
|
|
char *next;
|
|
unsigned size, t;
|
|
unsigned long flags;
|
|
u8 t1, t2;
|
|
int i;
|
|
const char *s;
|
|
|
|
dev = dev_get_drvdata(_dev);
|
|
next = buf;
|
|
size = PAGE_SIZE;
|
|
spin_lock_irqsave(&dev->lock, flags);
|
|
|
|
if (dev->driver)
|
|
s = dev->driver->driver.name;
|
|
else
|
|
s = "(none)";
|
|
|
|
/* Main Control Registers */
|
|
t = scnprintf(next, size, "%s version %s,"
|
|
"chiprev %02x, locctl %02x\n"
|
|
"irqenb0 %02x irqenb1 %02x "
|
|
"irqstat0 %02x irqstat1 %02x\n",
|
|
driver_name, driver_vers, dev->chiprev,
|
|
net2272_read(dev, LOCCTL),
|
|
net2272_read(dev, IRQENB0),
|
|
net2272_read(dev, IRQENB1),
|
|
net2272_read(dev, IRQSTAT0),
|
|
net2272_read(dev, IRQSTAT1));
|
|
size -= t;
|
|
next += t;
|
|
|
|
/* DMA */
|
|
t1 = net2272_read(dev, DMAREQ);
|
|
t = scnprintf(next, size, "\ndmareq %02x: %s %s%s%s%s\n",
|
|
t1, ep_name[(t1 & 0x01) + 1],
|
|
t1 & (1 << DMA_CONTROL_DACK) ? "dack " : "",
|
|
t1 & (1 << DMA_REQUEST_ENABLE) ? "reqenb " : "",
|
|
t1 & (1 << DMA_REQUEST) ? "req " : "",
|
|
t1 & (1 << DMA_BUFFER_VALID) ? "valid " : "");
|
|
size -= t;
|
|
next += t;
|
|
|
|
/* USB Control Registers */
|
|
t1 = net2272_read(dev, USBCTL1);
|
|
if (t1 & (1 << VBUS_PIN)) {
|
|
if (t1 & (1 << USB_HIGH_SPEED))
|
|
s = "high speed";
|
|
else if (dev->gadget.speed == USB_SPEED_UNKNOWN)
|
|
s = "powered";
|
|
else
|
|
s = "full speed";
|
|
} else
|
|
s = "not attached";
|
|
t = scnprintf(next, size,
|
|
"usbctl0 %02x usbctl1 %02x addr 0x%02x (%s)\n",
|
|
net2272_read(dev, USBCTL0), t1,
|
|
net2272_read(dev, OURADDR), s);
|
|
size -= t;
|
|
next += t;
|
|
|
|
/* Endpoint Registers */
|
|
for (i = 0; i < 4; ++i) {
|
|
struct net2272_ep *ep;
|
|
|
|
ep = &dev->ep[i];
|
|
if (i && !ep->desc)
|
|
continue;
|
|
|
|
t1 = net2272_ep_read(ep, EP_CFG);
|
|
t2 = net2272_ep_read(ep, EP_RSPSET);
|
|
t = scnprintf(next, size,
|
|
"\n%s\tcfg %02x rsp (%02x) %s%s%s%s%s%s%s%s"
|
|
"irqenb %02x\n",
|
|
ep->ep.name, t1, t2,
|
|
(t2 & (1 << ALT_NAK_OUT_PACKETS)) ? "NAK " : "",
|
|
(t2 & (1 << HIDE_STATUS_PHASE)) ? "hide " : "",
|
|
(t2 & (1 << AUTOVALIDATE)) ? "auto " : "",
|
|
(t2 & (1 << INTERRUPT_MODE)) ? "interrupt " : "",
|
|
(t2 & (1 << CONTROL_STATUS_PHASE_HANDSHAKE)) ? "status " : "",
|
|
(t2 & (1 << NAK_OUT_PACKETS_MODE)) ? "NAKmode " : "",
|
|
(t2 & (1 << ENDPOINT_TOGGLE)) ? "DATA1 " : "DATA0 ",
|
|
(t2 & (1 << ENDPOINT_HALT)) ? "HALT " : "",
|
|
net2272_ep_read(ep, EP_IRQENB));
|
|
size -= t;
|
|
next += t;
|
|
|
|
t = scnprintf(next, size,
|
|
"\tstat0 %02x stat1 %02x avail %04x "
|
|
"(ep%d%s-%s)%s\n",
|
|
net2272_ep_read(ep, EP_STAT0),
|
|
net2272_ep_read(ep, EP_STAT1),
|
|
(net2272_ep_read(ep, EP_AVAIL1) << 8) | net2272_ep_read(ep, EP_AVAIL0),
|
|
t1 & 0x0f,
|
|
ep->is_in ? "in" : "out",
|
|
type_string(t1 >> 5),
|
|
ep->stopped ? "*" : "");
|
|
size -= t;
|
|
next += t;
|
|
|
|
t = scnprintf(next, size,
|
|
"\tep_transfer %06x\n",
|
|
((net2272_ep_read(ep, EP_TRANSFER2) & 0xff) << 16) |
|
|
((net2272_ep_read(ep, EP_TRANSFER1) & 0xff) << 8) |
|
|
((net2272_ep_read(ep, EP_TRANSFER0) & 0xff)));
|
|
size -= t;
|
|
next += t;
|
|
|
|
t1 = net2272_ep_read(ep, EP_BUFF_STATES) & 0x03;
|
|
t2 = (net2272_ep_read(ep, EP_BUFF_STATES) >> 2) & 0x03;
|
|
t = scnprintf(next, size,
|
|
"\tbuf-a %s buf-b %s\n",
|
|
buf_state_string(t1),
|
|
buf_state_string(t2));
|
|
size -= t;
|
|
next += t;
|
|
}
|
|
|
|
spin_unlock_irqrestore(&dev->lock, flags);
|
|
|
|
return PAGE_SIZE - size;
|
|
}
|
|
static DEVICE_ATTR(registers, S_IRUGO, net2272_show_registers, NULL);
|
|
|
|
/*---------------------------------------------------------------------------*/
|
|
|
|
static void
|
|
net2272_set_fifo_mode(struct net2272 *dev, int mode)
|
|
{
|
|
u8 tmp;
|
|
|
|
tmp = net2272_read(dev, LOCCTL) & 0x3f;
|
|
tmp |= (mode << 6);
|
|
net2272_write(dev, LOCCTL, tmp);
|
|
|
|
INIT_LIST_HEAD(&dev->gadget.ep_list);
|
|
|
|
/* always ep-a, ep-c ... maybe not ep-b */
|
|
list_add_tail(&dev->ep[1].ep.ep_list, &dev->gadget.ep_list);
|
|
|
|
switch (mode) {
|
|
case 0:
|
|
list_add_tail(&dev->ep[2].ep.ep_list, &dev->gadget.ep_list);
|
|
dev->ep[1].fifo_size = dev->ep[2].fifo_size = 512;
|
|
break;
|
|
case 1:
|
|
list_add_tail(&dev->ep[2].ep.ep_list, &dev->gadget.ep_list);
|
|
dev->ep[1].fifo_size = 1024;
|
|
dev->ep[2].fifo_size = 512;
|
|
break;
|
|
case 2:
|
|
list_add_tail(&dev->ep[2].ep.ep_list, &dev->gadget.ep_list);
|
|
dev->ep[1].fifo_size = dev->ep[2].fifo_size = 1024;
|
|
break;
|
|
case 3:
|
|
dev->ep[1].fifo_size = 1024;
|
|
break;
|
|
}
|
|
|
|
/* ep-c is always 2 512 byte buffers */
|
|
list_add_tail(&dev->ep[3].ep.ep_list, &dev->gadget.ep_list);
|
|
dev->ep[3].fifo_size = 512;
|
|
}
|
|
|
|
/*---------------------------------------------------------------------------*/
|
|
|
|
static void
|
|
net2272_usb_reset(struct net2272 *dev)
|
|
{
|
|
dev->gadget.speed = USB_SPEED_UNKNOWN;
|
|
|
|
net2272_cancel_dma(dev);
|
|
|
|
net2272_write(dev, IRQENB0, 0);
|
|
net2272_write(dev, IRQENB1, 0);
|
|
|
|
/* clear irq state */
|
|
net2272_write(dev, IRQSTAT0, 0xff);
|
|
net2272_write(dev, IRQSTAT1, ~(1 << SUSPEND_REQUEST_INTERRUPT));
|
|
|
|
net2272_write(dev, DMAREQ,
|
|
(0 << DMA_BUFFER_VALID) |
|
|
(0 << DMA_REQUEST_ENABLE) |
|
|
(1 << DMA_CONTROL_DACK) |
|
|
(dev->dma_eot_polarity << EOT_POLARITY) |
|
|
(dev->dma_dack_polarity << DACK_POLARITY) |
|
|
(dev->dma_dreq_polarity << DREQ_POLARITY) |
|
|
((dma_ep >> 1) << DMA_ENDPOINT_SELECT));
|
|
|
|
net2272_cancel_dma(dev);
|
|
net2272_set_fifo_mode(dev, (fifo_mode <= 3) ? fifo_mode : 0);
|
|
|
|
/* Set the NET2272 ep fifo data width to 16-bit mode and for correct byte swapping
|
|
* note that the higher level gadget drivers are expected to convert data to little endian.
|
|
* Enable byte swap for your local bus/cpu if needed by setting BYTE_SWAP in LOCCTL here
|
|
*/
|
|
net2272_write(dev, LOCCTL, net2272_read(dev, LOCCTL) | (1 << DATA_WIDTH));
|
|
net2272_write(dev, LOCCTL1, (dma_mode << DMA_MODE));
|
|
}
|
|
|
|
static void
|
|
net2272_usb_reinit(struct net2272 *dev)
|
|
{
|
|
int i;
|
|
|
|
/* basic endpoint init */
|
|
for (i = 0; i < 4; ++i) {
|
|
struct net2272_ep *ep = &dev->ep[i];
|
|
|
|
ep->ep.name = ep_name[i];
|
|
ep->dev = dev;
|
|
ep->num = i;
|
|
ep->not_empty = 0;
|
|
|
|
if (use_dma && ep->num == dma_ep)
|
|
ep->dma = 1;
|
|
|
|
if (i > 0 && i <= 3)
|
|
ep->fifo_size = 512;
|
|
else
|
|
ep->fifo_size = 64;
|
|
net2272_ep_reset(ep);
|
|
}
|
|
dev->ep[0].ep.maxpacket = 64;
|
|
|
|
dev->gadget.ep0 = &dev->ep[0].ep;
|
|
dev->ep[0].stopped = 0;
|
|
INIT_LIST_HEAD(&dev->gadget.ep0->ep_list);
|
|
}
|
|
|
|
static void
|
|
net2272_ep0_start(struct net2272 *dev)
|
|
{
|
|
struct net2272_ep *ep0 = &dev->ep[0];
|
|
|
|
net2272_ep_write(ep0, EP_RSPSET,
|
|
(1 << NAK_OUT_PACKETS_MODE) |
|
|
(1 << ALT_NAK_OUT_PACKETS));
|
|
net2272_ep_write(ep0, EP_RSPCLR,
|
|
(1 << HIDE_STATUS_PHASE) |
|
|
(1 << CONTROL_STATUS_PHASE_HANDSHAKE));
|
|
net2272_write(dev, USBCTL0,
|
|
(dev->softconnect << USB_DETECT_ENABLE) |
|
|
(1 << USB_ROOT_PORT_WAKEUP_ENABLE) |
|
|
(1 << IO_WAKEUP_ENABLE));
|
|
net2272_write(dev, IRQENB0,
|
|
(1 << SETUP_PACKET_INTERRUPT_ENABLE) |
|
|
(1 << ENDPOINT_0_INTERRUPT_ENABLE) |
|
|
(1 << DMA_DONE_INTERRUPT_ENABLE));
|
|
net2272_write(dev, IRQENB1,
|
|
(1 << VBUS_INTERRUPT_ENABLE) |
|
|
(1 << ROOT_PORT_RESET_INTERRUPT_ENABLE) |
|
|
(1 << SUSPEND_REQUEST_CHANGE_INTERRUPT_ENABLE));
|
|
}
|
|
|
|
/* when a driver is successfully registered, it will receive
|
|
* control requests including set_configuration(), which enables
|
|
* non-control requests. then usb traffic follows until a
|
|
* disconnect is reported. then a host may connect again, or
|
|
* the driver might get unbound.
|
|
*/
|
|
static int net2272_start(struct usb_gadget *_gadget,
|
|
struct usb_gadget_driver *driver)
|
|
{
|
|
struct net2272 *dev;
|
|
unsigned i;
|
|
|
|
if (!driver || !driver->unbind || !driver->setup ||
|
|
driver->speed != USB_SPEED_HIGH)
|
|
return -EINVAL;
|
|
|
|
dev = container_of(_gadget, struct net2272, gadget);
|
|
|
|
for (i = 0; i < 4; ++i)
|
|
dev->ep[i].irqs = 0;
|
|
/* hook up the driver ... */
|
|
dev->softconnect = 1;
|
|
driver->driver.bus = NULL;
|
|
dev->driver = driver;
|
|
dev->gadget.dev.driver = &driver->driver;
|
|
|
|
/* ... then enable host detection and ep0; and we're ready
|
|
* for set_configuration as well as eventual disconnect.
|
|
*/
|
|
net2272_ep0_start(dev);
|
|
|
|
dev_dbg(dev->dev, "%s ready\n", driver->driver.name);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void
|
|
stop_activity(struct net2272 *dev, struct usb_gadget_driver *driver)
|
|
{
|
|
int i;
|
|
|
|
/* don't disconnect if it's not connected */
|
|
if (dev->gadget.speed == USB_SPEED_UNKNOWN)
|
|
driver = NULL;
|
|
|
|
/* stop hardware; prevent new request submissions;
|
|
* and kill any outstanding requests.
|
|
*/
|
|
net2272_usb_reset(dev);
|
|
for (i = 0; i < 4; ++i)
|
|
net2272_dequeue_all(&dev->ep[i]);
|
|
|
|
net2272_usb_reinit(dev);
|
|
}
|
|
|
|
static int net2272_stop(struct usb_gadget *_gadget,
|
|
struct usb_gadget_driver *driver)
|
|
{
|
|
struct net2272 *dev;
|
|
unsigned long flags;
|
|
|
|
dev = container_of(_gadget, struct net2272, gadget);
|
|
|
|
spin_lock_irqsave(&dev->lock, flags);
|
|
stop_activity(dev, driver);
|
|
spin_unlock_irqrestore(&dev->lock, flags);
|
|
|
|
dev->gadget.dev.driver = NULL;
|
|
dev->driver = NULL;
|
|
|
|
dev_dbg(dev->dev, "unregistered driver '%s'\n", driver->driver.name);
|
|
return 0;
|
|
}
|
|
|
|
/*---------------------------------------------------------------------------*/
|
|
/* handle ep-a/ep-b dma completions */
|
|
static void
|
|
net2272_handle_dma(struct net2272_ep *ep)
|
|
{
|
|
struct net2272_request *req;
|
|
unsigned len;
|
|
int status;
|
|
|
|
if (!list_empty(&ep->queue))
|
|
req = list_entry(ep->queue.next,
|
|
struct net2272_request, queue);
|
|
else
|
|
req = NULL;
|
|
|
|
dev_vdbg(ep->dev->dev, "handle_dma %s req %p\n", ep->ep.name, req);
|
|
|
|
/* Ensure DREQ is de-asserted */
|
|
net2272_write(ep->dev, DMAREQ,
|
|
(0 << DMA_BUFFER_VALID)
|
|
| (0 << DMA_REQUEST_ENABLE)
|
|
| (1 << DMA_CONTROL_DACK)
|
|
| (ep->dev->dma_eot_polarity << EOT_POLARITY)
|
|
| (ep->dev->dma_dack_polarity << DACK_POLARITY)
|
|
| (ep->dev->dma_dreq_polarity << DREQ_POLARITY)
|
|
| ((ep->dma >> 1) << DMA_ENDPOINT_SELECT));
|
|
|
|
ep->dev->dma_busy = 0;
|
|
|
|
net2272_ep_write(ep, EP_IRQENB,
|
|
(1 << DATA_PACKET_RECEIVED_INTERRUPT_ENABLE)
|
|
| (1 << DATA_PACKET_TRANSMITTED_INTERRUPT_ENABLE)
|
|
| net2272_ep_read(ep, EP_IRQENB));
|
|
|
|
/* device-to-host transfer completed */
|
|
if (ep->is_in) {
|
|
/* validate a short packet or zlp if necessary */
|
|
if ((req->req.length % ep->ep.maxpacket != 0) ||
|
|
req->req.zero)
|
|
set_fifo_bytecount(ep, 0);
|
|
|
|
net2272_done(ep, req, 0);
|
|
if (!list_empty(&ep->queue)) {
|
|
req = list_entry(ep->queue.next,
|
|
struct net2272_request, queue);
|
|
status = net2272_kick_dma(ep, req);
|
|
if (status < 0)
|
|
net2272_pio_advance(ep);
|
|
}
|
|
|
|
/* host-to-device transfer completed */
|
|
} else {
|
|
/* terminated with a short packet? */
|
|
if (net2272_read(ep->dev, IRQSTAT0) &
|
|
(1 << DMA_DONE_INTERRUPT)) {
|
|
/* abort system dma */
|
|
net2272_cancel_dma(ep->dev);
|
|
}
|
|
|
|
/* EP_TRANSFER will contain the number of bytes
|
|
* actually received.
|
|
* NOTE: There is no overflow detection on EP_TRANSFER:
|
|
* We can't deal with transfers larger than 2^24 bytes!
|
|
*/
|
|
len = (net2272_ep_read(ep, EP_TRANSFER2) << 16)
|
|
| (net2272_ep_read(ep, EP_TRANSFER1) << 8)
|
|
| (net2272_ep_read(ep, EP_TRANSFER0));
|
|
|
|
if (ep->not_empty)
|
|
len += 4;
|
|
|
|
req->req.actual += len;
|
|
|
|
/* get any remaining data */
|
|
net2272_pio_advance(ep);
|
|
}
|
|
}
|
|
|
|
/*---------------------------------------------------------------------------*/
|
|
|
|
static void
|
|
net2272_handle_ep(struct net2272_ep *ep)
|
|
{
|
|
struct net2272_request *req;
|
|
u8 stat0, stat1;
|
|
|
|
if (!list_empty(&ep->queue))
|
|
req = list_entry(ep->queue.next,
|
|
struct net2272_request, queue);
|
|
else
|
|
req = NULL;
|
|
|
|
/* ack all, and handle what we care about */
|
|
stat0 = net2272_ep_read(ep, EP_STAT0);
|
|
stat1 = net2272_ep_read(ep, EP_STAT1);
|
|
ep->irqs++;
|
|
|
|
dev_vdbg(ep->dev->dev, "%s ack ep_stat0 %02x, ep_stat1 %02x, req %p\n",
|
|
ep->ep.name, stat0, stat1, req ? &req->req : 0);
|
|
|
|
net2272_ep_write(ep, EP_STAT0, stat0 &
|
|
~((1 << NAK_OUT_PACKETS)
|
|
| (1 << SHORT_PACKET_TRANSFERRED_INTERRUPT)));
|
|
net2272_ep_write(ep, EP_STAT1, stat1);
|
|
|
|
/* data packet(s) received (in the fifo, OUT)
|
|
* direction must be validated, otherwise control read status phase
|
|
* could be interpreted as a valid packet
|
|
*/
|
|
if (!ep->is_in && (stat0 & (1 << DATA_PACKET_RECEIVED_INTERRUPT)))
|
|
net2272_pio_advance(ep);
|
|
/* data packet(s) transmitted (IN) */
|
|
else if (stat0 & (1 << DATA_PACKET_TRANSMITTED_INTERRUPT))
|
|
net2272_pio_advance(ep);
|
|
}
|
|
|
|
static struct net2272_ep *
|
|
net2272_get_ep_by_addr(struct net2272 *dev, u16 wIndex)
|
|
{
|
|
struct net2272_ep *ep;
|
|
|
|
if ((wIndex & USB_ENDPOINT_NUMBER_MASK) == 0)
|
|
return &dev->ep[0];
|
|
|
|
list_for_each_entry(ep, &dev->gadget.ep_list, ep.ep_list) {
|
|
u8 bEndpointAddress;
|
|
|
|
if (!ep->desc)
|
|
continue;
|
|
bEndpointAddress = ep->desc->bEndpointAddress;
|
|
if ((wIndex ^ bEndpointAddress) & USB_DIR_IN)
|
|
continue;
|
|
if ((wIndex & 0x0f) == (bEndpointAddress & 0x0f))
|
|
return ep;
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
/*
|
|
* USB Test Packet:
|
|
* JKJKJKJK * 9
|
|
* JJKKJJKK * 8
|
|
* JJJJKKKK * 8
|
|
* JJJJJJJKKKKKKK * 8
|
|
* JJJJJJJK * 8
|
|
* {JKKKKKKK * 10}, JK
|
|
*/
|
|
static const u8 net2272_test_packet[] = {
|
|
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
|
|
0xAA, 0xAA, 0xAA, 0xAA, 0xAA, 0xAA, 0xAA, 0xAA,
|
|
0xEE, 0xEE, 0xEE, 0xEE, 0xEE, 0xEE, 0xEE, 0xEE,
|
|
0xFE, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
|
|
0x7F, 0xBF, 0xDF, 0xEF, 0xF7, 0xFB, 0xFD,
|
|
0xFC, 0x7E, 0xBF, 0xDF, 0xEF, 0xF7, 0xFD, 0x7E
|
|
};
|
|
|
|
static void
|
|
net2272_set_test_mode(struct net2272 *dev, int mode)
|
|
{
|
|
int i;
|
|
|
|
/* Disable all net2272 interrupts:
|
|
* Nothing but a power cycle should stop the test.
|
|
*/
|
|
net2272_write(dev, IRQENB0, 0x00);
|
|
net2272_write(dev, IRQENB1, 0x00);
|
|
|
|
/* Force tranceiver to high-speed */
|
|
net2272_write(dev, XCVRDIAG, 1 << FORCE_HIGH_SPEED);
|
|
|
|
net2272_write(dev, PAGESEL, 0);
|
|
net2272_write(dev, EP_STAT0, 1 << DATA_PACKET_TRANSMITTED_INTERRUPT);
|
|
net2272_write(dev, EP_RSPCLR,
|
|
(1 << CONTROL_STATUS_PHASE_HANDSHAKE)
|
|
| (1 << HIDE_STATUS_PHASE));
|
|
net2272_write(dev, EP_CFG, 1 << ENDPOINT_DIRECTION);
|
|
net2272_write(dev, EP_STAT1, 1 << BUFFER_FLUSH);
|
|
|
|
/* wait for status phase to complete */
|
|
while (!(net2272_read(dev, EP_STAT0) &
|
|
(1 << DATA_PACKET_TRANSMITTED_INTERRUPT)))
|
|
;
|
|
|
|
/* Enable test mode */
|
|
net2272_write(dev, USBTEST, mode);
|
|
|
|
/* load test packet */
|
|
if (mode == TEST_PACKET) {
|
|
/* switch to 8 bit mode */
|
|
net2272_write(dev, LOCCTL, net2272_read(dev, LOCCTL) &
|
|
~(1 << DATA_WIDTH));
|
|
|
|
for (i = 0; i < sizeof(net2272_test_packet); ++i)
|
|
net2272_write(dev, EP_DATA, net2272_test_packet[i]);
|
|
|
|
/* Validate test packet */
|
|
net2272_write(dev, EP_TRANSFER0, 0);
|
|
}
|
|
}
|
|
|
|
static void
|
|
net2272_handle_stat0_irqs(struct net2272 *dev, u8 stat)
|
|
{
|
|
struct net2272_ep *ep;
|
|
u8 num, scratch;
|
|
|
|
/* starting a control request? */
|
|
if (unlikely(stat & (1 << SETUP_PACKET_INTERRUPT))) {
|
|
union {
|
|
u8 raw[8];
|
|
struct usb_ctrlrequest r;
|
|
} u;
|
|
int tmp = 0;
|
|
struct net2272_request *req;
|
|
|
|
if (dev->gadget.speed == USB_SPEED_UNKNOWN) {
|
|
if (net2272_read(dev, USBCTL1) & (1 << USB_HIGH_SPEED))
|
|
dev->gadget.speed = USB_SPEED_HIGH;
|
|
else
|
|
dev->gadget.speed = USB_SPEED_FULL;
|
|
dev_dbg(dev->dev, "%s\n",
|
|
usb_speed_string(dev->gadget.speed));
|
|
}
|
|
|
|
ep = &dev->ep[0];
|
|
ep->irqs++;
|
|
|
|
/* make sure any leftover interrupt state is cleared */
|
|
stat &= ~(1 << ENDPOINT_0_INTERRUPT);
|
|
while (!list_empty(&ep->queue)) {
|
|
req = list_entry(ep->queue.next,
|
|
struct net2272_request, queue);
|
|
net2272_done(ep, req,
|
|
(req->req.actual == req->req.length) ? 0 : -EPROTO);
|
|
}
|
|
ep->stopped = 0;
|
|
dev->protocol_stall = 0;
|
|
net2272_ep_write(ep, EP_STAT0,
|
|
(1 << DATA_IN_TOKEN_INTERRUPT)
|
|
| (1 << DATA_OUT_TOKEN_INTERRUPT)
|
|
| (1 << DATA_PACKET_TRANSMITTED_INTERRUPT)
|
|
| (1 << DATA_PACKET_RECEIVED_INTERRUPT)
|
|
| (1 << SHORT_PACKET_TRANSFERRED_INTERRUPT));
|
|
net2272_ep_write(ep, EP_STAT1,
|
|
(1 << TIMEOUT)
|
|
| (1 << USB_OUT_ACK_SENT)
|
|
| (1 << USB_OUT_NAK_SENT)
|
|
| (1 << USB_IN_ACK_RCVD)
|
|
| (1 << USB_IN_NAK_SENT)
|
|
| (1 << USB_STALL_SENT)
|
|
| (1 << LOCAL_OUT_ZLP));
|
|
|
|
/*
|
|
* Ensure Control Read pre-validation setting is beyond maximum size
|
|
* - Control Writes can leave non-zero values in EP_TRANSFER. If
|
|
* an EP0 transfer following the Control Write is a Control Read,
|
|
* the NET2272 sees the non-zero EP_TRANSFER as an unexpected
|
|
* pre-validation count.
|
|
* - Setting EP_TRANSFER beyond the maximum EP0 transfer size ensures
|
|
* the pre-validation count cannot cause an unexpected validatation
|
|
*/
|
|
net2272_write(dev, PAGESEL, 0);
|
|
net2272_write(dev, EP_TRANSFER2, 0xff);
|
|
net2272_write(dev, EP_TRANSFER1, 0xff);
|
|
net2272_write(dev, EP_TRANSFER0, 0xff);
|
|
|
|
u.raw[0] = net2272_read(dev, SETUP0);
|
|
u.raw[1] = net2272_read(dev, SETUP1);
|
|
u.raw[2] = net2272_read(dev, SETUP2);
|
|
u.raw[3] = net2272_read(dev, SETUP3);
|
|
u.raw[4] = net2272_read(dev, SETUP4);
|
|
u.raw[5] = net2272_read(dev, SETUP5);
|
|
u.raw[6] = net2272_read(dev, SETUP6);
|
|
u.raw[7] = net2272_read(dev, SETUP7);
|
|
/*
|
|
* If you have a big endian cpu make sure le16_to_cpus
|
|
* performs the proper byte swapping here...
|
|
*/
|
|
le16_to_cpus(&u.r.wValue);
|
|
le16_to_cpus(&u.r.wIndex);
|
|
le16_to_cpus(&u.r.wLength);
|
|
|
|
/* ack the irq */
|
|
net2272_write(dev, IRQSTAT0, 1 << SETUP_PACKET_INTERRUPT);
|
|
stat ^= (1 << SETUP_PACKET_INTERRUPT);
|
|
|
|
/* watch control traffic at the token level, and force
|
|
* synchronization before letting the status phase happen.
|
|
*/
|
|
ep->is_in = (u.r.bRequestType & USB_DIR_IN) != 0;
|
|
if (ep->is_in) {
|
|
scratch = (1 << DATA_PACKET_TRANSMITTED_INTERRUPT_ENABLE)
|
|
| (1 << DATA_OUT_TOKEN_INTERRUPT_ENABLE)
|
|
| (1 << DATA_IN_TOKEN_INTERRUPT_ENABLE);
|
|
stop_out_naking(ep);
|
|
} else
|
|
scratch = (1 << DATA_PACKET_RECEIVED_INTERRUPT_ENABLE)
|
|
| (1 << DATA_OUT_TOKEN_INTERRUPT_ENABLE)
|
|
| (1 << DATA_IN_TOKEN_INTERRUPT_ENABLE);
|
|
net2272_ep_write(ep, EP_IRQENB, scratch);
|
|
|
|
if ((u.r.bRequestType & USB_TYPE_MASK) != USB_TYPE_STANDARD)
|
|
goto delegate;
|
|
switch (u.r.bRequest) {
|
|
case USB_REQ_GET_STATUS: {
|
|
struct net2272_ep *e;
|
|
u16 status = 0;
|
|
|
|
switch (u.r.bRequestType & USB_RECIP_MASK) {
|
|
case USB_RECIP_ENDPOINT:
|
|
e = net2272_get_ep_by_addr(dev, u.r.wIndex);
|
|
if (!e || u.r.wLength > 2)
|
|
goto do_stall;
|
|
if (net2272_ep_read(e, EP_RSPSET) & (1 << ENDPOINT_HALT))
|
|
status = __constant_cpu_to_le16(1);
|
|
else
|
|
status = __constant_cpu_to_le16(0);
|
|
|
|
/* don't bother with a request object! */
|
|
net2272_ep_write(&dev->ep[0], EP_IRQENB, 0);
|
|
writew(status, net2272_reg_addr(dev, EP_DATA));
|
|
set_fifo_bytecount(&dev->ep[0], 0);
|
|
allow_status(ep);
|
|
dev_vdbg(dev->dev, "%s stat %02x\n",
|
|
ep->ep.name, status);
|
|
goto next_endpoints;
|
|
case USB_RECIP_DEVICE:
|
|
if (u.r.wLength > 2)
|
|
goto do_stall;
|
|
if (dev->is_selfpowered)
|
|
status = (1 << USB_DEVICE_SELF_POWERED);
|
|
|
|
/* don't bother with a request object! */
|
|
net2272_ep_write(&dev->ep[0], EP_IRQENB, 0);
|
|
writew(status, net2272_reg_addr(dev, EP_DATA));
|
|
set_fifo_bytecount(&dev->ep[0], 0);
|
|
allow_status(ep);
|
|
dev_vdbg(dev->dev, "device stat %02x\n", status);
|
|
goto next_endpoints;
|
|
case USB_RECIP_INTERFACE:
|
|
if (u.r.wLength > 2)
|
|
goto do_stall;
|
|
|
|
/* don't bother with a request object! */
|
|
net2272_ep_write(&dev->ep[0], EP_IRQENB, 0);
|
|
writew(status, net2272_reg_addr(dev, EP_DATA));
|
|
set_fifo_bytecount(&dev->ep[0], 0);
|
|
allow_status(ep);
|
|
dev_vdbg(dev->dev, "interface status %02x\n", status);
|
|
goto next_endpoints;
|
|
}
|
|
|
|
break;
|
|
}
|
|
case USB_REQ_CLEAR_FEATURE: {
|
|
struct net2272_ep *e;
|
|
|
|
if (u.r.bRequestType != USB_RECIP_ENDPOINT)
|
|
goto delegate;
|
|
if (u.r.wValue != USB_ENDPOINT_HALT ||
|
|
u.r.wLength != 0)
|
|
goto do_stall;
|
|
e = net2272_get_ep_by_addr(dev, u.r.wIndex);
|
|
if (!e)
|
|
goto do_stall;
|
|
if (e->wedged) {
|
|
dev_vdbg(dev->dev, "%s wedged, halt not cleared\n",
|
|
ep->ep.name);
|
|
} else {
|
|
dev_vdbg(dev->dev, "%s clear halt\n", ep->ep.name);
|
|
clear_halt(e);
|
|
}
|
|
allow_status(ep);
|
|
goto next_endpoints;
|
|
}
|
|
case USB_REQ_SET_FEATURE: {
|
|
struct net2272_ep *e;
|
|
|
|
if (u.r.bRequestType == USB_RECIP_DEVICE) {
|
|
if (u.r.wIndex != NORMAL_OPERATION)
|
|
net2272_set_test_mode(dev, (u.r.wIndex >> 8));
|
|
allow_status(ep);
|
|
dev_vdbg(dev->dev, "test mode: %d\n", u.r.wIndex);
|
|
goto next_endpoints;
|
|
} else if (u.r.bRequestType != USB_RECIP_ENDPOINT)
|
|
goto delegate;
|
|
if (u.r.wValue != USB_ENDPOINT_HALT ||
|
|
u.r.wLength != 0)
|
|
goto do_stall;
|
|
e = net2272_get_ep_by_addr(dev, u.r.wIndex);
|
|
if (!e)
|
|
goto do_stall;
|
|
set_halt(e);
|
|
allow_status(ep);
|
|
dev_vdbg(dev->dev, "%s set halt\n", ep->ep.name);
|
|
goto next_endpoints;
|
|
}
|
|
case USB_REQ_SET_ADDRESS: {
|
|
net2272_write(dev, OURADDR, u.r.wValue & 0xff);
|
|
allow_status(ep);
|
|
break;
|
|
}
|
|
default:
|
|
delegate:
|
|
dev_vdbg(dev->dev, "setup %02x.%02x v%04x i%04x "
|
|
"ep_cfg %08x\n",
|
|
u.r.bRequestType, u.r.bRequest,
|
|
u.r.wValue, u.r.wIndex,
|
|
net2272_ep_read(ep, EP_CFG));
|
|
spin_unlock(&dev->lock);
|
|
tmp = dev->driver->setup(&dev->gadget, &u.r);
|
|
spin_lock(&dev->lock);
|
|
}
|
|
|
|
/* stall ep0 on error */
|
|
if (tmp < 0) {
|
|
do_stall:
|
|
dev_vdbg(dev->dev, "req %02x.%02x protocol STALL; stat %d\n",
|
|
u.r.bRequestType, u.r.bRequest, tmp);
|
|
dev->protocol_stall = 1;
|
|
}
|
|
/* endpoint dma irq? */
|
|
} else if (stat & (1 << DMA_DONE_INTERRUPT)) {
|
|
net2272_cancel_dma(dev);
|
|
net2272_write(dev, IRQSTAT0, 1 << DMA_DONE_INTERRUPT);
|
|
stat &= ~(1 << DMA_DONE_INTERRUPT);
|
|
num = (net2272_read(dev, DMAREQ) & (1 << DMA_ENDPOINT_SELECT))
|
|
? 2 : 1;
|
|
|
|
ep = &dev->ep[num];
|
|
net2272_handle_dma(ep);
|
|
}
|
|
|
|
next_endpoints:
|
|
/* endpoint data irq? */
|
|
scratch = stat & 0x0f;
|
|
stat &= ~0x0f;
|
|
for (num = 0; scratch; num++) {
|
|
u8 t;
|
|
|
|
/* does this endpoint's FIFO and queue need tending? */
|
|
t = 1 << num;
|
|
if ((scratch & t) == 0)
|
|
continue;
|
|
scratch ^= t;
|
|
|
|
ep = &dev->ep[num];
|
|
net2272_handle_ep(ep);
|
|
}
|
|
|
|
/* some interrupts we can just ignore */
|
|
stat &= ~(1 << SOF_INTERRUPT);
|
|
|
|
if (stat)
|
|
dev_dbg(dev->dev, "unhandled irqstat0 %02x\n", stat);
|
|
}
|
|
|
|
static void
|
|
net2272_handle_stat1_irqs(struct net2272 *dev, u8 stat)
|
|
{
|
|
u8 tmp, mask;
|
|
|
|
/* after disconnect there's nothing else to do! */
|
|
tmp = (1 << VBUS_INTERRUPT) | (1 << ROOT_PORT_RESET_INTERRUPT);
|
|
mask = (1 << USB_HIGH_SPEED) | (1 << USB_FULL_SPEED);
|
|
|
|
if (stat & tmp) {
|
|
net2272_write(dev, IRQSTAT1, tmp);
|
|
if ((((stat & (1 << ROOT_PORT_RESET_INTERRUPT)) &&
|
|
((net2272_read(dev, USBCTL1) & mask) == 0))
|
|
|| ((net2272_read(dev, USBCTL1) & (1 << VBUS_PIN))
|
|
== 0))
|
|
&& (dev->gadget.speed != USB_SPEED_UNKNOWN)) {
|
|
dev_dbg(dev->dev, "disconnect %s\n",
|
|
dev->driver->driver.name);
|
|
stop_activity(dev, dev->driver);
|
|
net2272_ep0_start(dev);
|
|
return;
|
|
}
|
|
stat &= ~tmp;
|
|
|
|
if (!stat)
|
|
return;
|
|
}
|
|
|
|
tmp = (1 << SUSPEND_REQUEST_CHANGE_INTERRUPT);
|
|
if (stat & tmp) {
|
|
net2272_write(dev, IRQSTAT1, tmp);
|
|
if (stat & (1 << SUSPEND_REQUEST_INTERRUPT)) {
|
|
if (dev->driver->suspend)
|
|
dev->driver->suspend(&dev->gadget);
|
|
if (!enable_suspend) {
|
|
stat &= ~(1 << SUSPEND_REQUEST_INTERRUPT);
|
|
dev_dbg(dev->dev, "Suspend disabled, ignoring\n");
|
|
}
|
|
} else {
|
|
if (dev->driver->resume)
|
|
dev->driver->resume(&dev->gadget);
|
|
}
|
|
stat &= ~tmp;
|
|
}
|
|
|
|
/* clear any other status/irqs */
|
|
if (stat)
|
|
net2272_write(dev, IRQSTAT1, stat);
|
|
|
|
/* some status we can just ignore */
|
|
stat &= ~((1 << CONTROL_STATUS_INTERRUPT)
|
|
| (1 << SUSPEND_REQUEST_INTERRUPT)
|
|
| (1 << RESUME_INTERRUPT));
|
|
if (!stat)
|
|
return;
|
|
else
|
|
dev_dbg(dev->dev, "unhandled irqstat1 %02x\n", stat);
|
|
}
|
|
|
|
static irqreturn_t net2272_irq(int irq, void *_dev)
|
|
{
|
|
struct net2272 *dev = _dev;
|
|
#if defined(PLX_PCI_RDK) || defined(PLX_PCI_RDK2)
|
|
u32 intcsr;
|
|
#endif
|
|
#if defined(PLX_PCI_RDK)
|
|
u8 dmareq;
|
|
#endif
|
|
spin_lock(&dev->lock);
|
|
#if defined(PLX_PCI_RDK)
|
|
intcsr = readl(dev->rdk1.plx9054_base_addr + INTCSR);
|
|
|
|
if ((intcsr & LOCAL_INTERRUPT_TEST) == LOCAL_INTERRUPT_TEST) {
|
|
writel(intcsr & ~(1 << PCI_INTERRUPT_ENABLE),
|
|
dev->rdk1.plx9054_base_addr + INTCSR);
|
|
net2272_handle_stat1_irqs(dev, net2272_read(dev, IRQSTAT1));
|
|
net2272_handle_stat0_irqs(dev, net2272_read(dev, IRQSTAT0));
|
|
intcsr = readl(dev->rdk1.plx9054_base_addr + INTCSR);
|
|
writel(intcsr | (1 << PCI_INTERRUPT_ENABLE),
|
|
dev->rdk1.plx9054_base_addr + INTCSR);
|
|
}
|
|
if ((intcsr & DMA_CHANNEL_0_TEST) == DMA_CHANNEL_0_TEST) {
|
|
writeb((1 << CHANNEL_CLEAR_INTERRUPT | (0 << CHANNEL_ENABLE)),
|
|
dev->rdk1.plx9054_base_addr + DMACSR0);
|
|
|
|
dmareq = net2272_read(dev, DMAREQ);
|
|
if (dmareq & 0x01)
|
|
net2272_handle_dma(&dev->ep[2]);
|
|
else
|
|
net2272_handle_dma(&dev->ep[1]);
|
|
}
|
|
#endif
|
|
#if defined(PLX_PCI_RDK2)
|
|
/* see if PCI int for us by checking irqstat */
|
|
intcsr = readl(dev->rdk2.fpga_base_addr + RDK2_IRQSTAT);
|
|
if (!intcsr & (1 << NET2272_PCI_IRQ))
|
|
return IRQ_NONE;
|
|
/* check dma interrupts */
|
|
#endif
|
|
/* Platform/devcice interrupt handler */
|
|
#if !defined(PLX_PCI_RDK)
|
|
net2272_handle_stat1_irqs(dev, net2272_read(dev, IRQSTAT1));
|
|
net2272_handle_stat0_irqs(dev, net2272_read(dev, IRQSTAT0));
|
|
#endif
|
|
spin_unlock(&dev->lock);
|
|
|
|
return IRQ_HANDLED;
|
|
}
|
|
|
|
static int net2272_present(struct net2272 *dev)
|
|
{
|
|
/*
|
|
* Quick test to see if CPU can communicate properly with the NET2272.
|
|
* Verifies connection using writes and reads to write/read and
|
|
* read-only registers.
|
|
*
|
|
* This routine is strongly recommended especially during early bring-up
|
|
* of new hardware, however for designs that do not apply Power On System
|
|
* Tests (POST) it may discarded (or perhaps minimized).
|
|
*/
|
|
unsigned int ii;
|
|
u8 val, refval;
|
|
|
|
/* Verify NET2272 write/read SCRATCH register can write and read */
|
|
refval = net2272_read(dev, SCRATCH);
|
|
for (ii = 0; ii < 0x100; ii += 7) {
|
|
net2272_write(dev, SCRATCH, ii);
|
|
val = net2272_read(dev, SCRATCH);
|
|
if (val != ii) {
|
|
dev_dbg(dev->dev,
|
|
"%s: write/read SCRATCH register test failed: "
|
|
"wrote:0x%2.2x, read:0x%2.2x\n",
|
|
__func__, ii, val);
|
|
return -EINVAL;
|
|
}
|
|
}
|
|
/* To be nice, we write the original SCRATCH value back: */
|
|
net2272_write(dev, SCRATCH, refval);
|
|
|
|
/* Verify NET2272 CHIPREV register is read-only: */
|
|
refval = net2272_read(dev, CHIPREV_2272);
|
|
for (ii = 0; ii < 0x100; ii += 7) {
|
|
net2272_write(dev, CHIPREV_2272, ii);
|
|
val = net2272_read(dev, CHIPREV_2272);
|
|
if (val != refval) {
|
|
dev_dbg(dev->dev,
|
|
"%s: write/read CHIPREV register test failed: "
|
|
"wrote 0x%2.2x, read:0x%2.2x expected:0x%2.2x\n",
|
|
__func__, ii, val, refval);
|
|
return -EINVAL;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Verify NET2272's "NET2270 legacy revision" register
|
|
* - NET2272 has two revision registers. The NET2270 legacy revision
|
|
* register should read the same value, regardless of the NET2272
|
|
* silicon revision. The legacy register applies to NET2270
|
|
* firmware being applied to the NET2272.
|
|
*/
|
|
val = net2272_read(dev, CHIPREV_LEGACY);
|
|
if (val != NET2270_LEGACY_REV) {
|
|
/*
|
|
* Unexpected legacy revision value
|
|
* - Perhaps the chip is a NET2270?
|
|
*/
|
|
dev_dbg(dev->dev,
|
|
"%s: WARNING: UNEXPECTED NET2272 LEGACY REGISTER VALUE:\n"
|
|
" - CHIPREV_LEGACY: expected 0x%2.2x, got:0x%2.2x. (Not NET2272?)\n",
|
|
__func__, NET2270_LEGACY_REV, val);
|
|
return -EINVAL;
|
|
}
|
|
|
|
/*
|
|
* Verify NET2272 silicon revision
|
|
* - This revision register is appropriate for the silicon version
|
|
* of the NET2272
|
|
*/
|
|
val = net2272_read(dev, CHIPREV_2272);
|
|
switch (val) {
|
|
case CHIPREV_NET2272_R1:
|
|
/*
|
|
* NET2272 Rev 1 has DMA related errata:
|
|
* - Newer silicon (Rev 1A or better) required
|
|
*/
|
|
dev_dbg(dev->dev,
|
|
"%s: Rev 1 detected: newer silicon recommended for DMA support\n",
|
|
__func__);
|
|
break;
|
|
case CHIPREV_NET2272_R1A:
|
|
break;
|
|
default:
|
|
/* NET2272 silicon version *may* not work with this firmware */
|
|
dev_dbg(dev->dev,
|
|
"%s: unexpected silicon revision register value: "
|
|
" CHIPREV_2272: 0x%2.2x\n",
|
|
__func__, val);
|
|
/*
|
|
* Return Success, even though the chip rev is not an expected value
|
|
* - Older, pre-built firmware can attempt to operate on newer silicon
|
|
* - Often, new silicon is perfectly compatible
|
|
*/
|
|
}
|
|
|
|
/* Success: NET2272 checks out OK */
|
|
return 0;
|
|
}
|
|
|
|
static void
|
|
net2272_gadget_release(struct device *_dev)
|
|
{
|
|
struct net2272 *dev = dev_get_drvdata(_dev);
|
|
kfree(dev);
|
|
}
|
|
|
|
/*---------------------------------------------------------------------------*/
|
|
|
|
static void __devexit
|
|
net2272_remove(struct net2272 *dev)
|
|
{
|
|
usb_del_gadget_udc(&dev->gadget);
|
|
|
|
/* start with the driver above us */
|
|
if (dev->driver) {
|
|
/* should have been done already by driver model core */
|
|
dev_warn(dev->dev, "pci remove, driver '%s' is still registered\n",
|
|
dev->driver->driver.name);
|
|
usb_gadget_unregister_driver(dev->driver);
|
|
}
|
|
|
|
free_irq(dev->irq, dev);
|
|
iounmap(dev->base_addr);
|
|
|
|
device_unregister(&dev->gadget.dev);
|
|
device_remove_file(dev->dev, &dev_attr_registers);
|
|
|
|
dev_info(dev->dev, "unbind\n");
|
|
}
|
|
|
|
static struct net2272 * __devinit
|
|
net2272_probe_init(struct device *dev, unsigned int irq)
|
|
{
|
|
struct net2272 *ret;
|
|
|
|
if (!irq) {
|
|
dev_dbg(dev, "No IRQ!\n");
|
|
return ERR_PTR(-ENODEV);
|
|
}
|
|
|
|
/* alloc, and start init */
|
|
ret = kzalloc(sizeof(*ret), GFP_KERNEL);
|
|
if (!ret)
|
|
return ERR_PTR(-ENOMEM);
|
|
|
|
spin_lock_init(&ret->lock);
|
|
ret->irq = irq;
|
|
ret->dev = dev;
|
|
ret->gadget.ops = &net2272_ops;
|
|
ret->gadget.is_dualspeed = 1;
|
|
|
|
/* the "gadget" abstracts/virtualizes the controller */
|
|
dev_set_name(&ret->gadget.dev, "gadget");
|
|
ret->gadget.dev.parent = dev;
|
|
ret->gadget.dev.dma_mask = dev->dma_mask;
|
|
ret->gadget.dev.release = net2272_gadget_release;
|
|
ret->gadget.name = driver_name;
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int __devinit
|
|
net2272_probe_fin(struct net2272 *dev, unsigned int irqflags)
|
|
{
|
|
int ret;
|
|
|
|
/* See if there... */
|
|
if (net2272_present(dev)) {
|
|
dev_warn(dev->dev, "2272 not found!\n");
|
|
ret = -ENODEV;
|
|
goto err;
|
|
}
|
|
|
|
net2272_usb_reset(dev);
|
|
net2272_usb_reinit(dev);
|
|
|
|
ret = request_irq(dev->irq, net2272_irq, irqflags, driver_name, dev);
|
|
if (ret) {
|
|
dev_err(dev->dev, "request interrupt %i failed\n", dev->irq);
|
|
goto err;
|
|
}
|
|
|
|
dev->chiprev = net2272_read(dev, CHIPREV_2272);
|
|
|
|
/* done */
|
|
dev_info(dev->dev, "%s\n", driver_desc);
|
|
dev_info(dev->dev, "irq %i, mem %p, chip rev %04x, dma %s\n",
|
|
dev->irq, dev->base_addr, dev->chiprev,
|
|
dma_mode_string());
|
|
dev_info(dev->dev, "version: %s\n", driver_vers);
|
|
|
|
ret = device_register(&dev->gadget.dev);
|
|
if (ret)
|
|
goto err_irq;
|
|
ret = device_create_file(dev->dev, &dev_attr_registers);
|
|
if (ret)
|
|
goto err_dev_reg;
|
|
|
|
ret = usb_add_gadget_udc(dev->dev, &dev->gadget);
|
|
if (ret)
|
|
goto err_add_udc;
|
|
|
|
return 0;
|
|
|
|
err_add_udc:
|
|
device_remove_file(dev->dev, &dev_attr_registers);
|
|
err_dev_reg:
|
|
device_unregister(&dev->gadget.dev);
|
|
err_irq:
|
|
free_irq(dev->irq, dev);
|
|
err:
|
|
return ret;
|
|
}
|
|
|
|
#ifdef CONFIG_PCI
|
|
|
|
/*
|
|
* wrap this driver around the specified device, but
|
|
* don't respond over USB until a gadget driver binds to us
|
|
*/
|
|
|
|
static int __devinit
|
|
net2272_rdk1_probe(struct pci_dev *pdev, struct net2272 *dev)
|
|
{
|
|
unsigned long resource, len, tmp;
|
|
void __iomem *mem_mapped_addr[4];
|
|
int ret, i;
|
|
|
|
/*
|
|
* BAR 0 holds PLX 9054 config registers
|
|
* BAR 1 is i/o memory; unused here
|
|
* BAR 2 holds EPLD config registers
|
|
* BAR 3 holds NET2272 registers
|
|
*/
|
|
|
|
/* Find and map all address spaces */
|
|
for (i = 0; i < 4; ++i) {
|
|
if (i == 1)
|
|
continue; /* BAR1 unused */
|
|
|
|
resource = pci_resource_start(pdev, i);
|
|
len = pci_resource_len(pdev, i);
|
|
|
|
if (!request_mem_region(resource, len, driver_name)) {
|
|
dev_dbg(dev->dev, "controller already in use\n");
|
|
ret = -EBUSY;
|
|
goto err;
|
|
}
|
|
|
|
mem_mapped_addr[i] = ioremap_nocache(resource, len);
|
|
if (mem_mapped_addr[i] == NULL) {
|
|
release_mem_region(resource, len);
|
|
dev_dbg(dev->dev, "can't map memory\n");
|
|
ret = -EFAULT;
|
|
goto err;
|
|
}
|
|
}
|
|
|
|
dev->rdk1.plx9054_base_addr = mem_mapped_addr[0];
|
|
dev->rdk1.epld_base_addr = mem_mapped_addr[2];
|
|
dev->base_addr = mem_mapped_addr[3];
|
|
|
|
/* Set PLX 9054 bus width (16 bits) */
|
|
tmp = readl(dev->rdk1.plx9054_base_addr + LBRD1);
|
|
writel((tmp & ~(3 << MEMORY_SPACE_LOCAL_BUS_WIDTH)) | W16_BIT,
|
|
dev->rdk1.plx9054_base_addr + LBRD1);
|
|
|
|
/* Enable PLX 9054 Interrupts */
|
|
writel(readl(dev->rdk1.plx9054_base_addr + INTCSR) |
|
|
(1 << PCI_INTERRUPT_ENABLE) |
|
|
(1 << LOCAL_INTERRUPT_INPUT_ENABLE),
|
|
dev->rdk1.plx9054_base_addr + INTCSR);
|
|
|
|
writeb((1 << CHANNEL_CLEAR_INTERRUPT | (0 << CHANNEL_ENABLE)),
|
|
dev->rdk1.plx9054_base_addr + DMACSR0);
|
|
|
|
/* reset */
|
|
writeb((1 << EPLD_DMA_ENABLE) |
|
|
(1 << DMA_CTL_DACK) |
|
|
(1 << DMA_TIMEOUT_ENABLE) |
|
|
(1 << USER) |
|
|
(0 << MPX_MODE) |
|
|
(1 << BUSWIDTH) |
|
|
(1 << NET2272_RESET),
|
|
dev->base_addr + EPLD_IO_CONTROL_REGISTER);
|
|
|
|
mb();
|
|
writeb(readb(dev->base_addr + EPLD_IO_CONTROL_REGISTER) &
|
|
~(1 << NET2272_RESET),
|
|
dev->base_addr + EPLD_IO_CONTROL_REGISTER);
|
|
udelay(200);
|
|
|
|
return 0;
|
|
|
|
err:
|
|
while (--i >= 0) {
|
|
iounmap(mem_mapped_addr[i]);
|
|
release_mem_region(pci_resource_start(pdev, i),
|
|
pci_resource_len(pdev, i));
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int __devinit
|
|
net2272_rdk2_probe(struct pci_dev *pdev, struct net2272 *dev)
|
|
{
|
|
unsigned long resource, len;
|
|
void __iomem *mem_mapped_addr[2];
|
|
int ret, i;
|
|
|
|
/*
|
|
* BAR 0 holds FGPA config registers
|
|
* BAR 1 holds NET2272 registers
|
|
*/
|
|
|
|
/* Find and map all address spaces, bar2-3 unused in rdk 2 */
|
|
for (i = 0; i < 2; ++i) {
|
|
resource = pci_resource_start(pdev, i);
|
|
len = pci_resource_len(pdev, i);
|
|
|
|
if (!request_mem_region(resource, len, driver_name)) {
|
|
dev_dbg(dev->dev, "controller already in use\n");
|
|
ret = -EBUSY;
|
|
goto err;
|
|
}
|
|
|
|
mem_mapped_addr[i] = ioremap_nocache(resource, len);
|
|
if (mem_mapped_addr[i] == NULL) {
|
|
release_mem_region(resource, len);
|
|
dev_dbg(dev->dev, "can't map memory\n");
|
|
ret = -EFAULT;
|
|
goto err;
|
|
}
|
|
}
|
|
|
|
dev->rdk2.fpga_base_addr = mem_mapped_addr[0];
|
|
dev->base_addr = mem_mapped_addr[1];
|
|
|
|
mb();
|
|
/* Set 2272 bus width (16 bits) and reset */
|
|
writel((1 << CHIP_RESET), dev->rdk2.fpga_base_addr + RDK2_LOCCTLRDK);
|
|
udelay(200);
|
|
writel((1 << BUS_WIDTH), dev->rdk2.fpga_base_addr + RDK2_LOCCTLRDK);
|
|
/* Print fpga version number */
|
|
dev_info(dev->dev, "RDK2 FPGA version %08x\n",
|
|
readl(dev->rdk2.fpga_base_addr + RDK2_FPGAREV));
|
|
/* Enable FPGA Interrupts */
|
|
writel((1 << NET2272_PCI_IRQ), dev->rdk2.fpga_base_addr + RDK2_IRQENB);
|
|
|
|
return 0;
|
|
|
|
err:
|
|
while (--i >= 0) {
|
|
iounmap(mem_mapped_addr[i]);
|
|
release_mem_region(pci_resource_start(pdev, i),
|
|
pci_resource_len(pdev, i));
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int __devinit
|
|
net2272_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id)
|
|
{
|
|
struct net2272 *dev;
|
|
int ret;
|
|
|
|
dev = net2272_probe_init(&pdev->dev, pdev->irq);
|
|
if (IS_ERR(dev))
|
|
return PTR_ERR(dev);
|
|
dev->dev_id = pdev->device;
|
|
|
|
if (pci_enable_device(pdev) < 0) {
|
|
ret = -ENODEV;
|
|
goto err_free;
|
|
}
|
|
|
|
pci_set_master(pdev);
|
|
|
|
switch (pdev->device) {
|
|
case PCI_DEVICE_ID_RDK1: ret = net2272_rdk1_probe(pdev, dev); break;
|
|
case PCI_DEVICE_ID_RDK2: ret = net2272_rdk2_probe(pdev, dev); break;
|
|
default: BUG();
|
|
}
|
|
if (ret)
|
|
goto err_pci;
|
|
|
|
ret = net2272_probe_fin(dev, 0);
|
|
if (ret)
|
|
goto err_pci;
|
|
|
|
pci_set_drvdata(pdev, dev);
|
|
|
|
return 0;
|
|
|
|
err_pci:
|
|
pci_disable_device(pdev);
|
|
err_free:
|
|
kfree(dev);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static void __devexit
|
|
net2272_rdk1_remove(struct pci_dev *pdev, struct net2272 *dev)
|
|
{
|
|
int i;
|
|
|
|
/* disable PLX 9054 interrupts */
|
|
writel(readl(dev->rdk1.plx9054_base_addr + INTCSR) &
|
|
~(1 << PCI_INTERRUPT_ENABLE),
|
|
dev->rdk1.plx9054_base_addr + INTCSR);
|
|
|
|
/* clean up resources allocated during probe() */
|
|
iounmap(dev->rdk1.plx9054_base_addr);
|
|
iounmap(dev->rdk1.epld_base_addr);
|
|
|
|
for (i = 0; i < 4; ++i) {
|
|
if (i == 1)
|
|
continue; /* BAR1 unused */
|
|
release_mem_region(pci_resource_start(pdev, i),
|
|
pci_resource_len(pdev, i));
|
|
}
|
|
}
|
|
|
|
static void __devexit
|
|
net2272_rdk2_remove(struct pci_dev *pdev, struct net2272 *dev)
|
|
{
|
|
int i;
|
|
|
|
/* disable fpga interrupts
|
|
writel(readl(dev->rdk1.plx9054_base_addr + INTCSR) &
|
|
~(1 << PCI_INTERRUPT_ENABLE),
|
|
dev->rdk1.plx9054_base_addr + INTCSR);
|
|
*/
|
|
|
|
/* clean up resources allocated during probe() */
|
|
iounmap(dev->rdk2.fpga_base_addr);
|
|
|
|
for (i = 0; i < 2; ++i)
|
|
release_mem_region(pci_resource_start(pdev, i),
|
|
pci_resource_len(pdev, i));
|
|
}
|
|
|
|
static void __devexit
|
|
net2272_pci_remove(struct pci_dev *pdev)
|
|
{
|
|
struct net2272 *dev = pci_get_drvdata(pdev);
|
|
|
|
net2272_remove(dev);
|
|
|
|
switch (pdev->device) {
|
|
case PCI_DEVICE_ID_RDK1: net2272_rdk1_remove(pdev, dev); break;
|
|
case PCI_DEVICE_ID_RDK2: net2272_rdk2_remove(pdev, dev); break;
|
|
default: BUG();
|
|
}
|
|
|
|
pci_disable_device(pdev);
|
|
|
|
kfree(dev);
|
|
}
|
|
|
|
/* Table of matching PCI IDs */
|
|
static struct pci_device_id __devinitdata pci_ids[] = {
|
|
{ /* RDK 1 card */
|
|
.class = ((PCI_CLASS_BRIDGE_OTHER << 8) | 0xfe),
|
|
.class_mask = 0,
|
|
.vendor = PCI_VENDOR_ID_PLX,
|
|
.device = PCI_DEVICE_ID_RDK1,
|
|
.subvendor = PCI_ANY_ID,
|
|
.subdevice = PCI_ANY_ID,
|
|
},
|
|
{ /* RDK 2 card */
|
|
.class = ((PCI_CLASS_BRIDGE_OTHER << 8) | 0xfe),
|
|
.class_mask = 0,
|
|
.vendor = PCI_VENDOR_ID_PLX,
|
|
.device = PCI_DEVICE_ID_RDK2,
|
|
.subvendor = PCI_ANY_ID,
|
|
.subdevice = PCI_ANY_ID,
|
|
},
|
|
{ }
|
|
};
|
|
MODULE_DEVICE_TABLE(pci, pci_ids);
|
|
|
|
static struct pci_driver net2272_pci_driver = {
|
|
.name = driver_name,
|
|
.id_table = pci_ids,
|
|
|
|
.probe = net2272_pci_probe,
|
|
.remove = __devexit_p(net2272_pci_remove),
|
|
};
|
|
|
|
static int net2272_pci_register(void)
|
|
{
|
|
return pci_register_driver(&net2272_pci_driver);
|
|
}
|
|
|
|
static void net2272_pci_unregister(void)
|
|
{
|
|
pci_unregister_driver(&net2272_pci_driver);
|
|
}
|
|
|
|
#else
|
|
static inline int net2272_pci_register(void) { return 0; }
|
|
static inline void net2272_pci_unregister(void) { }
|
|
#endif
|
|
|
|
/*---------------------------------------------------------------------------*/
|
|
|
|
static int __devinit
|
|
net2272_plat_probe(struct platform_device *pdev)
|
|
{
|
|
struct net2272 *dev;
|
|
int ret;
|
|
unsigned int irqflags;
|
|
resource_size_t base, len;
|
|
struct resource *iomem, *iomem_bus, *irq_res;
|
|
|
|
irq_res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
|
|
iomem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
|
|
iomem_bus = platform_get_resource(pdev, IORESOURCE_BUS, 0);
|
|
if (!irq_res || !iomem) {
|
|
dev_err(&pdev->dev, "must provide irq/base addr");
|
|
return -EINVAL;
|
|
}
|
|
|
|
dev = net2272_probe_init(&pdev->dev, irq_res->start);
|
|
if (IS_ERR(dev))
|
|
return PTR_ERR(dev);
|
|
|
|
irqflags = 0;
|
|
if (irq_res->flags & IORESOURCE_IRQ_HIGHEDGE)
|
|
irqflags |= IRQF_TRIGGER_RISING;
|
|
if (irq_res->flags & IORESOURCE_IRQ_LOWEDGE)
|
|
irqflags |= IRQF_TRIGGER_FALLING;
|
|
if (irq_res->flags & IORESOURCE_IRQ_HIGHLEVEL)
|
|
irqflags |= IRQF_TRIGGER_HIGH;
|
|
if (irq_res->flags & IORESOURCE_IRQ_LOWLEVEL)
|
|
irqflags |= IRQF_TRIGGER_LOW;
|
|
|
|
base = iomem->start;
|
|
len = resource_size(iomem);
|
|
if (iomem_bus)
|
|
dev->base_shift = iomem_bus->start;
|
|
|
|
if (!request_mem_region(base, len, driver_name)) {
|
|
dev_dbg(dev->dev, "get request memory region!\n");
|
|
ret = -EBUSY;
|
|
goto err;
|
|
}
|
|
dev->base_addr = ioremap_nocache(base, len);
|
|
if (!dev->base_addr) {
|
|
dev_dbg(dev->dev, "can't map memory\n");
|
|
ret = -EFAULT;
|
|
goto err_req;
|
|
}
|
|
|
|
ret = net2272_probe_fin(dev, IRQF_TRIGGER_LOW);
|
|
if (ret)
|
|
goto err_io;
|
|
|
|
platform_set_drvdata(pdev, dev);
|
|
dev_info(&pdev->dev, "running in 16-bit, %sbyte swap local bus mode\n",
|
|
(net2272_read(dev, LOCCTL) & (1 << BYTE_SWAP)) ? "" : "no ");
|
|
|
|
return 0;
|
|
|
|
err_io:
|
|
iounmap(dev->base_addr);
|
|
err_req:
|
|
release_mem_region(base, len);
|
|
err:
|
|
return ret;
|
|
}
|
|
|
|
static int __devexit
|
|
net2272_plat_remove(struct platform_device *pdev)
|
|
{
|
|
struct net2272 *dev = platform_get_drvdata(pdev);
|
|
|
|
net2272_remove(dev);
|
|
|
|
release_mem_region(pdev->resource[0].start,
|
|
resource_size(&pdev->resource[0]));
|
|
|
|
kfree(dev);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static struct platform_driver net2272_plat_driver = {
|
|
.probe = net2272_plat_probe,
|
|
.remove = __devexit_p(net2272_plat_remove),
|
|
.driver = {
|
|
.name = driver_name,
|
|
.owner = THIS_MODULE,
|
|
},
|
|
/* FIXME .suspend, .resume */
|
|
};
|
|
MODULE_ALIAS("platform:net2272");
|
|
|
|
static int __init net2272_init(void)
|
|
{
|
|
int ret;
|
|
|
|
ret = net2272_pci_register();
|
|
if (ret)
|
|
return ret;
|
|
ret = platform_driver_register(&net2272_plat_driver);
|
|
if (ret)
|
|
goto err_pci;
|
|
return ret;
|
|
|
|
err_pci:
|
|
net2272_pci_unregister();
|
|
return ret;
|
|
}
|
|
module_init(net2272_init);
|
|
|
|
static void __exit net2272_cleanup(void)
|
|
{
|
|
net2272_pci_unregister();
|
|
platform_driver_unregister(&net2272_plat_driver);
|
|
}
|
|
module_exit(net2272_cleanup);
|
|
|
|
MODULE_DESCRIPTION(DRIVER_DESC);
|
|
MODULE_AUTHOR("PLX Technology, Inc.");
|
|
MODULE_LICENSE("GPL");
|