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2725 lines
68 KiB
2725 lines
68 KiB
// SPDX-License-Identifier: GPL-2.0+ |
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/* |
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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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|
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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/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/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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|
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#ifdef CONFIG_USB_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 bool use_dma = false; |
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module_param(use_dma, bool, 0644); |
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|
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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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/* |
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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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/* |
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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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/* |
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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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|
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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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|
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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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|
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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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|
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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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|
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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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|
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static const struct usb_ep_ops net2272_ep_ops; |
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|
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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); |
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spin_lock_irqsave(&dev->lock, flags); |
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_ep->maxpacket = max; |
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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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|
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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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|
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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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usb_ep_set_maxpacket_limit(&ep->ep, ~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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|
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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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|
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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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|
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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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|
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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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|
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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_request *req; |
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|
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if (!_ep) |
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return NULL; |
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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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INIT_LIST_HEAD(&req->queue); |
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|
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return &req->req; |
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} |
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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_request *req; |
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|
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if (!_ep || !_req) |
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return; |
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|
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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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|
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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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|
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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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|
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list_del_init(&req->queue); |
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|
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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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|
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dev = ep->dev; |
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if (use_dma && ep->dma) |
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usb_gadget_unmap_request(&dev->gadget, &req->req, |
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ep->is_in); |
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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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|
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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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usb_gadget_giveback_request(&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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|
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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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|
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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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|
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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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|
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count = length; |
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bufp = (u16 *)buf; |
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|
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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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|
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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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|
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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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|
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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) |
|
| (net2272_ep_read(ep, EP_AVAIL0)); |
|
|
|
count = net2272_write_packet(ep, buf, req, max); |
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/* see if we are done */ |
|
if (req->req.length == req->req.actual) { |
|
/* 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)) { |
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req = list_entry(ep->queue.next, |
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struct net2272_request, |
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queue); |
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status = net2272_kick_dma(ep, req); |
|
|
|
if (status < 0) |
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if ((net2272_ep_read(ep, EP_STAT0) |
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& (1 << BUFFER_EMPTY))) |
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goto top; |
|
} |
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return 1; |
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} |
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net2272_ep_write(ep, EP_STAT0, (1 << DATA_PACKET_TRANSMITTED_INTERRUPT)); |
|
} |
|
return 0; |
|
} |
|
|
|
static void |
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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); |
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} |
|
|
|
static int |
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net2272_read_packet(struct net2272_ep *ep, u8 *buf, |
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struct net2272_request *req, unsigned avail) |
|
{ |
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u16 __iomem *ep_data = net2272_reg_addr(ep->dev, EP_DATA); |
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unsigned is_short; |
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u16 *bufp; |
|
|
|
req->req.actual += avail; |
|
|
|
dev_vdbg(ep->dev->dev, "read packet %s req %p len %u avail %u\n", |
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ep->ep.name, req, avail, |
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(net2272_ep_read(ep, EP_AVAIL1) << 8) | net2272_ep_read(ep, EP_AVAIL0)); |
|
|
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is_short = (avail < ep->ep.maxpacket); |
|
|
|
if (unlikely(avail == 0)) { |
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/* remove any zlp from the buffer */ |
|
(void)readw(ep_data); |
|
return is_short; |
|
} |
|
|
|
/* Ensure we get the final byte */ |
|
if (unlikely(avail % 2)) |
|
avail++; |
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bufp = (u16 *)buf; |
|
|
|
do { |
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*bufp++ = readw(ep_data); |
|
avail -= 2; |
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} 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; |
|
|
|
dev_vdbg(ep->dev->dev, "read_fifo %s actual %d len %d\n", |
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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)) { |
|
|
|
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)) { |
|
int status; |
|
|
|
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_USB_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_USB_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_USB_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) { |
|
status = usb_gadget_map_request(&dev->gadget, _req, |
|
ep->is_in); |
|
if (status) |
|
return status; |
|
} |
|
|
|
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)) |
|
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) { |
|
ep->stopped = stopped; |
|
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 const 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) |
|
{ |
|
if (!_gadget) |
|
return -ENODEV; |
|
|
|
_gadget->is_selfpowered = (value != 0); |
|
|
|
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); |
|
static void net2272_async_callbacks(struct usb_gadget *_gadget, bool enable); |
|
|
|
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, |
|
.udc_async_callbacks = net2272_async_callbacks, |
|
}; |
|
|
|
/*---------------------------------------------------------------------------*/ |
|
|
|
static ssize_t |
|
registers_show(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); |
|
|
|
/* 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_RO(registers); |
|
|
|
/*---------------------------------------------------------------------------*/ |
|
|
|
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); |
|
|
|
if (i == 0) { |
|
ep->ep.caps.type_control = true; |
|
} else { |
|
ep->ep.caps.type_iso = true; |
|
ep->ep.caps.type_bulk = true; |
|
ep->ep.caps.type_int = true; |
|
} |
|
|
|
ep->ep.caps.dir_in = true; |
|
ep->ep.caps.dir_out = true; |
|
} |
|
usb_ep_set_maxpacket_limit(&dev->ep[0].ep, 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->setup || |
|
driver->max_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; |
|
|
|
/* ... then enable host detection and ep0; and we're ready |
|
* for set_configuration as well as eventual disconnect. |
|
*/ |
|
net2272_ep0_start(dev); |
|
|
|
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]); |
|
|
|
/* report disconnect; the driver is already quiesced */ |
|
if (dev->async_callbacks && driver) { |
|
spin_unlock(&dev->lock); |
|
driver->disconnect(&dev->gadget); |
|
spin_lock(&dev->lock); |
|
} |
|
|
|
net2272_usb_reinit(dev); |
|
} |
|
|
|
static int net2272_stop(struct usb_gadget *_gadget) |
|
{ |
|
struct net2272 *dev; |
|
unsigned long flags; |
|
|
|
dev = container_of(_gadget, struct net2272, gadget); |
|
|
|
spin_lock_irqsave(&dev->lock, flags); |
|
stop_activity(dev, NULL); |
|
spin_unlock_irqrestore(&dev->lock, flags); |
|
|
|
dev->driver = NULL; |
|
|
|
return 0; |
|
} |
|
|
|
static void net2272_async_callbacks(struct usb_gadget *_gadget, bool enable) |
|
{ |
|
struct net2272 *dev = container_of(_gadget, struct net2272, gadget); |
|
|
|
spin_lock_irq(&dev->lock); |
|
dev->async_callbacks = enable; |
|
spin_unlock_irq(&dev->lock); |
|
} |
|
|
|
/*---------------------------------------------------------------------------*/ |
|
/* 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 << 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 : NULL); |
|
|
|
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 == USB_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 = cpu_to_le16(1); |
|
else |
|
status = 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->gadget.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)); |
|
if (dev->async_callbacks) { |
|
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) { |
|
bool reset = false; |
|
bool disconnect = false; |
|
|
|
/* |
|
* Ignore disconnects and resets if the speed hasn't been set. |
|
* VBUS can bounce and there's always an initial reset. |
|
*/ |
|
net2272_write(dev, IRQSTAT1, tmp); |
|
if (dev->gadget.speed != USB_SPEED_UNKNOWN) { |
|
if ((stat & (1 << VBUS_INTERRUPT)) && |
|
(net2272_read(dev, USBCTL1) & |
|
(1 << VBUS_PIN)) == 0) { |
|
disconnect = true; |
|
dev_dbg(dev->dev, "disconnect %s\n", |
|
dev->driver->driver.name); |
|
} else if ((stat & (1 << ROOT_PORT_RESET_INTERRUPT)) && |
|
(net2272_read(dev, USBCTL1) & mask) |
|
== 0) { |
|
reset = true; |
|
dev_dbg(dev->dev, "reset %s\n", |
|
dev->driver->driver.name); |
|
} |
|
|
|
if (disconnect || reset) { |
|
stop_activity(dev, dev->driver); |
|
net2272_ep0_start(dev); |
|
if (dev->async_callbacks) { |
|
spin_unlock(&dev->lock); |
|
if (reset) |
|
usb_gadget_udc_reset(&dev->gadget, dev->driver); |
|
else |
|
(dev->driver->disconnect)(&dev->gadget); |
|
spin_lock(&dev->lock); |
|
} |
|
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->async_callbacks && 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->async_callbacks && 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))) { |
|
spin_unlock(&dev->lock); |
|
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 = container_of(_dev, struct net2272, gadget.dev); |
|
|
|
kfree(dev); |
|
} |
|
|
|
/*---------------------------------------------------------------------------*/ |
|
|
|
static void |
|
net2272_remove(struct net2272 *dev) |
|
{ |
|
if (dev->added) |
|
usb_del_gadget(&dev->gadget); |
|
free_irq(dev->irq, dev); |
|
iounmap(dev->base_addr); |
|
device_remove_file(dev->dev, &dev_attr_registers); |
|
|
|
dev_info(dev->dev, "unbind\n"); |
|
} |
|
|
|
static struct net2272 *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.max_speed = USB_SPEED_HIGH; |
|
|
|
/* the "gadget" abstracts/virtualizes the controller */ |
|
ret->gadget.name = driver_name; |
|
usb_initialize_gadget(dev, &ret->gadget, net2272_gadget_release); |
|
|
|
return ret; |
|
} |
|
|
|
static int |
|
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_create_file(dev->dev, &dev_attr_registers); |
|
if (ret) |
|
goto err_irq; |
|
|
|
ret = usb_add_gadget(&dev->gadget); |
|
if (ret) |
|
goto err_add_udc; |
|
dev->added = 1; |
|
|
|
return 0; |
|
|
|
err_add_udc: |
|
device_remove_file(dev->dev, &dev_attr_registers); |
|
err_irq: |
|
free_irq(dev->irq, dev); |
|
err: |
|
return ret; |
|
} |
|
|
|
#ifdef CONFIG_USB_PCI |
|
|
|
/* |
|
* wrap this driver around the specified device, but |
|
* don't respond over USB until a gadget driver binds to us |
|
*/ |
|
|
|
static int |
|
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(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) { |
|
if (i == 1) |
|
continue; /* BAR1 unused */ |
|
iounmap(mem_mapped_addr[i]); |
|
release_mem_region(pci_resource_start(pdev, i), |
|
pci_resource_len(pdev, i)); |
|
} |
|
|
|
return ret; |
|
} |
|
|
|
static int |
|
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(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 |
|
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_put; |
|
} |
|
|
|
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_put: |
|
usb_put_gadget(&dev->gadget); |
|
|
|
return ret; |
|
} |
|
|
|
static void |
|
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 |
|
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 |
|
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); |
|
|
|
usb_put_gadget(&dev->gadget); |
|
} |
|
|
|
/* Table of matching PCI IDs */ |
|
static struct pci_device_id 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 = 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 |
|
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(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: |
|
usb_put_gadget(&dev->gadget); |
|
|
|
return ret; |
|
} |
|
|
|
static int |
|
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])); |
|
|
|
usb_put_gadget(&dev->gadget); |
|
|
|
return 0; |
|
} |
|
|
|
static struct platform_driver net2272_plat_driver = { |
|
.probe = net2272_plat_probe, |
|
.remove = net2272_plat_remove, |
|
.driver = { |
|
.name = driver_name, |
|
}, |
|
/* 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");
|
|
|