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1d50071b53
There is no need to store the dentry pointer for a debugfs file that we only use to remove it when the device goes away. debugfs can do the lookup for us instead, saving us some trouble, and making things smaller overall. Cc: Daniel Mack <daniel@zonque.org> Cc: Haojian Zhuang <haojian.zhuang@gmail.com> Cc: Robert Jarzmik <robert.jarzmik@free.fr> Cc: Felipe Balbi <balbi@kernel.org> Cc: linux-usb@vger.kernel.org Acked-by: Daniel Mack <daniel@zonque.org> Link: https://lore.kernel.org/r/20210518162054.3697992-1-gregkh@linuxfoundation.org Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
246 lines
6.2 KiB
C
246 lines
6.2 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* Intel PXA25x on-chip full speed USB device controller
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*
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* Copyright (C) 2003 Robert Schwebel <r.schwebel@pengutronix.de>, Pengutronix
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* Copyright (C) 2003 David Brownell
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*/
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#ifndef __LINUX_USB_GADGET_PXA25X_H
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#define __LINUX_USB_GADGET_PXA25X_H
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#include <linux/types.h>
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/*-------------------------------------------------------------------------*/
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/* pxa25x has this (move to include/asm-arm/arch-pxa/pxa-regs.h) */
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#define UFNRH_SIR (1 << 7) /* SOF interrupt request */
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#define UFNRH_SIM (1 << 6) /* SOF interrupt mask */
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#define UFNRH_IPE14 (1 << 5) /* ISO packet error, ep14 */
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#define UFNRH_IPE9 (1 << 4) /* ISO packet error, ep9 */
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#define UFNRH_IPE4 (1 << 3) /* ISO packet error, ep4 */
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/* pxa255 has this (move to include/asm-arm/arch-pxa/pxa-regs.h) */
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#define UDCCFR UDC_RES2 /* UDC Control Function Register */
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#define UDCCFR_AREN (1 << 7) /* ACK response enable (now) */
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#define UDCCFR_ACM (1 << 2) /* ACK control mode (wait for AREN) */
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/* latest pxa255 errata define new "must be one" bits in UDCCFR */
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#define UDCCFR_MB1 (0xff & ~(UDCCFR_AREN|UDCCFR_ACM))
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/*-------------------------------------------------------------------------*/
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struct pxa25x_udc;
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struct pxa25x_ep {
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struct usb_ep ep;
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struct pxa25x_udc *dev;
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struct list_head queue;
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unsigned long pio_irqs;
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unsigned short fifo_size;
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u8 bEndpointAddress;
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u8 bmAttributes;
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unsigned stopped : 1;
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unsigned dma_fixup : 1;
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/* UDCCS = UDC Control/Status for this EP
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* UBCR = UDC Byte Count Remaining (contents of OUT fifo)
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* UDDR = UDC Endpoint Data Register (the fifo)
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* DRCM = DMA Request Channel Map
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*/
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u32 regoff_udccs;
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u32 regoff_ubcr;
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u32 regoff_uddr;
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};
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struct pxa25x_request {
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struct usb_request req;
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struct list_head queue;
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};
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enum ep0_state {
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EP0_IDLE,
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EP0_IN_DATA_PHASE,
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EP0_OUT_DATA_PHASE,
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EP0_END_XFER,
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EP0_STALL,
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};
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#define EP0_FIFO_SIZE ((unsigned)16)
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#define BULK_FIFO_SIZE ((unsigned)64)
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#define ISO_FIFO_SIZE ((unsigned)256)
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#define INT_FIFO_SIZE ((unsigned)8)
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struct udc_stats {
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struct ep0stats {
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unsigned long ops;
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unsigned long bytes;
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} read, write;
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unsigned long irqs;
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};
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#ifdef CONFIG_USB_PXA25X_SMALL
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/* when memory's tight, SMALL config saves code+data. */
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#define PXA_UDC_NUM_ENDPOINTS 3
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#endif
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#ifndef PXA_UDC_NUM_ENDPOINTS
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#define PXA_UDC_NUM_ENDPOINTS 16
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#endif
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struct pxa25x_udc {
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struct usb_gadget gadget;
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struct usb_gadget_driver *driver;
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enum ep0_state ep0state;
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struct udc_stats stats;
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unsigned got_irq : 1,
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vbus : 1,
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pullup : 1,
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has_cfr : 1,
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req_pending : 1,
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req_std : 1,
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req_config : 1,
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suspended : 1,
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active : 1;
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#define start_watchdog(dev) mod_timer(&dev->timer, jiffies + (HZ/200))
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struct timer_list timer;
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struct device *dev;
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struct clk *clk;
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struct pxa2xx_udc_mach_info *mach;
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struct usb_phy *transceiver;
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u64 dma_mask;
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struct pxa25x_ep ep [PXA_UDC_NUM_ENDPOINTS];
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void __iomem *regs;
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};
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#define to_pxa25x(g) (container_of((g), struct pxa25x_udc, gadget))
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/*-------------------------------------------------------------------------*/
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#ifdef CONFIG_ARCH_LUBBOCK
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#include <mach/lubbock.h>
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/* lubbock can also report usb connect/disconnect irqs */
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#endif
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static struct pxa25x_udc *the_controller;
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/*-------------------------------------------------------------------------*/
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/*
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* Debugging support vanishes in non-debug builds. DBG_NORMAL should be
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* mostly silent during normal use/testing, with no timing side-effects.
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*/
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#define DBG_NORMAL 1 /* error paths, device state transitions */
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#define DBG_VERBOSE 2 /* add some success path trace info */
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#define DBG_NOISY 3 /* ... even more: request level */
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#define DBG_VERY_NOISY 4 /* ... even more: packet level */
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#define DMSG(stuff...) pr_debug("udc: " stuff)
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#ifdef DEBUG
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static const char *state_name[] = {
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"EP0_IDLE",
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"EP0_IN_DATA_PHASE", "EP0_OUT_DATA_PHASE",
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"EP0_END_XFER", "EP0_STALL"
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};
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#ifdef VERBOSE_DEBUG
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# define UDC_DEBUG DBG_VERBOSE
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#else
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# define UDC_DEBUG DBG_NORMAL
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#endif
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static void __maybe_unused
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dump_udccr(const char *label)
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{
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u32 udccr = UDCCR;
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DMSG("%s %02X =%s%s%s%s%s%s%s%s\n",
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label, udccr,
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(udccr & UDCCR_REM) ? " rem" : "",
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(udccr & UDCCR_RSTIR) ? " rstir" : "",
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(udccr & UDCCR_SRM) ? " srm" : "",
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(udccr & UDCCR_SUSIR) ? " susir" : "",
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(udccr & UDCCR_RESIR) ? " resir" : "",
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(udccr & UDCCR_RSM) ? " rsm" : "",
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(udccr & UDCCR_UDA) ? " uda" : "",
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(udccr & UDCCR_UDE) ? " ude" : "");
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}
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static void __maybe_unused
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dump_udccs0(const char *label)
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{
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u32 udccs0 = UDCCS0;
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DMSG("%s %s %02X =%s%s%s%s%s%s%s%s\n",
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label, state_name[the_controller->ep0state], udccs0,
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(udccs0 & UDCCS0_SA) ? " sa" : "",
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(udccs0 & UDCCS0_RNE) ? " rne" : "",
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(udccs0 & UDCCS0_FST) ? " fst" : "",
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(udccs0 & UDCCS0_SST) ? " sst" : "",
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(udccs0 & UDCCS0_DRWF) ? " dwrf" : "",
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(udccs0 & UDCCS0_FTF) ? " ftf" : "",
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(udccs0 & UDCCS0_IPR) ? " ipr" : "",
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(udccs0 & UDCCS0_OPR) ? " opr" : "");
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}
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static inline u32 udc_ep_get_UDCCS(struct pxa25x_ep *);
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static void __maybe_unused
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dump_state(struct pxa25x_udc *dev)
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{
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u32 tmp;
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unsigned i;
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DMSG("%s, uicr %02X.%02X, usir %02X.%02x, ufnr %02X.%02X\n",
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state_name[dev->ep0state],
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UICR1, UICR0, USIR1, USIR0, UFNRH, UFNRL);
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dump_udccr("udccr");
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if (dev->has_cfr) {
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tmp = UDCCFR;
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DMSG("udccfr %02X =%s%s\n", tmp,
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(tmp & UDCCFR_AREN) ? " aren" : "",
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(tmp & UDCCFR_ACM) ? " acm" : "");
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}
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if (!dev->driver) {
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DMSG("no gadget driver bound\n");
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return;
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} else
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DMSG("ep0 driver '%s'\n", dev->driver->driver.name);
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dump_udccs0 ("udccs0");
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DMSG("ep0 IN %lu/%lu, OUT %lu/%lu\n",
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dev->stats.write.bytes, dev->stats.write.ops,
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dev->stats.read.bytes, dev->stats.read.ops);
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for (i = 1; i < PXA_UDC_NUM_ENDPOINTS; i++) {
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if (dev->ep[i].ep.desc == NULL)
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continue;
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DMSG ("udccs%d = %02x\n", i, udc_ep_get_UDCCS(&dev->ep[i]));
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}
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}
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#else
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#define dump_udccr(x) do{}while(0)
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#define dump_udccs0(x) do{}while(0)
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#define dump_state(x) do{}while(0)
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#define UDC_DEBUG ((unsigned)0)
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#endif
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#define DBG(lvl, stuff...) do{if ((lvl) <= UDC_DEBUG) DMSG(stuff);}while(0)
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#define ERR(stuff...) pr_err("udc: " stuff)
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#define WARNING(stuff...) pr_warn("udc: " stuff)
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#define INFO(stuff...) pr_info("udc: " stuff)
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#endif /* __LINUX_USB_GADGET_PXA25X_H */
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