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linux-kernel-test/drivers/usb/gadget/pxa2xx_udc.h
David Brownell ad8c623f4f USB: pxa2xx_udc -- cleanups, mostly removing dma hooks 
Cleanups to the pxa2xx_udc code:

  - Primarily removing unused DMA hooks.
  - One "sparse" warning removed
  - Remove some Lubbock-only LED hooks (for debugging)

That DMA code was never really completed.  It worked, mostly, for IN
transfers (to the host) if they were fortuitously aligned, but that
code was never fully tested.  And it was never coded for OUT transfers
(which is where DMA would really help) ... because of chip errata on
essentially every chip other than the pxa255, and because of design
botches (nothing automated data toggle).  So it's effectively been
dead code for several years now ... no point in keeping it around.

Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2007-07-12 16:34:42 -07:00

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/*
* linux/drivers/usb/gadget/pxa2xx_udc.h
* Intel PXA2xx on-chip full speed USB device controller
*
* Copyright (C) 2003 Robert Schwebel <r.schwebel@pengutronix.de>, Pengutronix
* Copyright (C) 2003 David Brownell
*
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#ifndef __LINUX_USB_GADGET_PXA2XX_H
#define __LINUX_USB_GADGET_PXA2XX_H
#include <linux/types.h>
/*-------------------------------------------------------------------------*/
/* pxa2xx has this (move to include/asm-arm/arch-pxa/pxa-regs.h) */
#define UFNRH_SIR (1 << 7) /* SOF interrupt request */
#define UFNRH_SIM (1 << 6) /* SOF interrupt mask */
#define UFNRH_IPE14 (1 << 5) /* ISO packet error, ep14 */
#define UFNRH_IPE9 (1 << 4) /* ISO packet error, ep9 */
#define UFNRH_IPE4 (1 << 3) /* ISO packet error, ep4 */
/* pxa255 has this (move to include/asm-arm/arch-pxa/pxa-regs.h) */
#define UDCCFR UDC_RES2 /* UDC Control Function Register */
#define UDCCFR_AREN (1 << 7) /* ACK response enable (now) */
#define UDCCFR_ACM (1 << 2) /* ACK control mode (wait for AREN) */
/* latest pxa255 errata define new "must be one" bits in UDCCFR */
#define UDCCFR_MB1 (0xff & ~(UDCCFR_AREN|UDCCFR_ACM))
/*-------------------------------------------------------------------------*/
struct pxa2xx_udc;
struct pxa2xx_ep {
struct usb_ep ep;
struct pxa2xx_udc *dev;
const struct usb_endpoint_descriptor *desc;
struct list_head queue;
unsigned long pio_irqs;
unsigned short fifo_size;
u8 bEndpointAddress;
u8 bmAttributes;
unsigned stopped : 1;
unsigned dma_fixup : 1;
/* UDCCS = UDC Control/Status for this EP
* UBCR = UDC Byte Count Remaining (contents of OUT fifo)
* UDDR = UDC Endpoint Data Register (the fifo)
* DRCM = DMA Request Channel Map
*/
volatile u32 *reg_udccs;
volatile u32 *reg_ubcr;
volatile u32 *reg_uddr;
};
struct pxa2xx_request {
struct usb_request req;
struct list_head queue;
};
enum ep0_state {
EP0_IDLE,
EP0_IN_DATA_PHASE,
EP0_OUT_DATA_PHASE,
EP0_END_XFER,
EP0_STALL,
};
#define EP0_FIFO_SIZE ((unsigned)16)
#define BULK_FIFO_SIZE ((unsigned)64)
#define ISO_FIFO_SIZE ((unsigned)256)
#define INT_FIFO_SIZE ((unsigned)8)
struct udc_stats {
struct ep0stats {
unsigned long ops;
unsigned long bytes;
} read, write;
unsigned long irqs;
};
#ifdef CONFIG_USB_PXA2XX_SMALL
/* when memory's tight, SMALL config saves code+data. */
#define PXA_UDC_NUM_ENDPOINTS 3
#endif
#ifndef PXA_UDC_NUM_ENDPOINTS
#define PXA_UDC_NUM_ENDPOINTS 16
#endif
struct pxa2xx_udc {
struct usb_gadget gadget;
struct usb_gadget_driver *driver;
enum ep0_state ep0state;
struct udc_stats stats;
unsigned got_irq : 1,
vbus : 1,
pullup : 1,
has_cfr : 1,
req_pending : 1,
req_std : 1,
req_config : 1;
#define start_watchdog(dev) mod_timer(&dev->timer, jiffies + (HZ/200))
struct timer_list timer;
struct device *dev;
struct pxa2xx_udc_mach_info *mach;
u64 dma_mask;
struct pxa2xx_ep ep [PXA_UDC_NUM_ENDPOINTS];
};
/*-------------------------------------------------------------------------*/
#ifdef CONFIG_ARCH_LUBBOCK
#include <asm/arch/lubbock.h>
/* lubbock can also report usb connect/disconnect irqs */
#endif
static struct pxa2xx_udc *the_controller;
/*-------------------------------------------------------------------------*/
/*
* Debugging support vanishes in non-debug builds. DBG_NORMAL should be
* mostly silent during normal use/testing, with no timing side-effects.
*/
#define DBG_NORMAL 1 /* error paths, device state transitions */
#define DBG_VERBOSE 2 /* add some success path trace info */
#define DBG_NOISY 3 /* ... even more: request level */
#define DBG_VERY_NOISY 4 /* ... even more: packet level */
#ifdef DEBUG
static const char *state_name[] = {
"EP0_IDLE",
"EP0_IN_DATA_PHASE", "EP0_OUT_DATA_PHASE",
"EP0_END_XFER", "EP0_STALL"
};
#define DMSG(stuff...) printk(KERN_DEBUG "udc: " stuff)
#ifdef VERBOSE
# define UDC_DEBUG DBG_VERBOSE
#else
# define UDC_DEBUG DBG_NORMAL
#endif
static void __maybe_unused
dump_udccr(const char *label)
{
u32 udccr = UDCCR;
DMSG("%s %02X =%s%s%s%s%s%s%s%s\n",
label, udccr,
(udccr & UDCCR_REM) ? " rem" : "",
(udccr & UDCCR_RSTIR) ? " rstir" : "",
(udccr & UDCCR_SRM) ? " srm" : "",
(udccr & UDCCR_SUSIR) ? " susir" : "",
(udccr & UDCCR_RESIR) ? " resir" : "",
(udccr & UDCCR_RSM) ? " rsm" : "",
(udccr & UDCCR_UDA) ? " uda" : "",
(udccr & UDCCR_UDE) ? " ude" : "");
}
static void __maybe_unused
dump_udccs0(const char *label)
{
u32 udccs0 = UDCCS0;
DMSG("%s %s %02X =%s%s%s%s%s%s%s%s\n",
label, state_name[the_controller->ep0state], udccs0,
(udccs0 & UDCCS0_SA) ? " sa" : "",
(udccs0 & UDCCS0_RNE) ? " rne" : "",
(udccs0 & UDCCS0_FST) ? " fst" : "",
(udccs0 & UDCCS0_SST) ? " sst" : "",
(udccs0 & UDCCS0_DRWF) ? " dwrf" : "",
(udccs0 & UDCCS0_FTF) ? " ftf" : "",
(udccs0 & UDCCS0_IPR) ? " ipr" : "",
(udccs0 & UDCCS0_OPR) ? " opr" : "");
}
static void __maybe_unused
dump_state(struct pxa2xx_udc *dev)
{
u32 tmp;
unsigned i;
DMSG("%s %s, uicr %02X.%02X, usir %02X.%02x, ufnr %02X.%02X\n",
is_usb_connected() ? "host " : "disconnected",
state_name[dev->ep0state],
UICR1, UICR0, USIR1, USIR0, UFNRH, UFNRL);
dump_udccr("udccr");
if (dev->has_cfr) {
tmp = UDCCFR;
DMSG("udccfr %02X =%s%s\n", tmp,
(tmp & UDCCFR_AREN) ? " aren" : "",
(tmp & UDCCFR_ACM) ? " acm" : "");
}
if (!dev->driver) {
DMSG("no gadget driver bound\n");
return;
} else
DMSG("ep0 driver '%s'\n", dev->driver->driver.name);
if (!is_usb_connected())
return;
dump_udccs0 ("udccs0");
DMSG("ep0 IN %lu/%lu, OUT %lu/%lu\n",
dev->stats.write.bytes, dev->stats.write.ops,
dev->stats.read.bytes, dev->stats.read.ops);
for (i = 1; i < PXA_UDC_NUM_ENDPOINTS; i++) {
if (dev->ep [i].desc == 0)
continue;
DMSG ("udccs%d = %02x\n", i, *dev->ep->reg_udccs);
}
}
#else
#define DMSG(stuff...) do{}while(0)
#define dump_udccr(x) do{}while(0)
#define dump_udccs0(x) do{}while(0)
#define dump_state(x) do{}while(0)
#define UDC_DEBUG ((unsigned)0)
#endif
#define DBG(lvl, stuff...) do{if ((lvl) <= UDC_DEBUG) DMSG(stuff);}while(0)
#define WARN(stuff...) printk(KERN_WARNING "udc: " stuff)
#define INFO(stuff...) printk(KERN_INFO "udc: " stuff)
#endif /* __LINUX_USB_GADGET_PXA2XX_H */
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