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63a4b52c9d
Patch from Ian Campbell The sparse warning initially surfaced in sound/arm/pxa2xx-ac97.c because it was using u32 * variables to hold the unsigned long * register addresses. I submitted an ALSA patch for this http://thread.gmane.org/gmane.linux.alsa.devel/27804 issue and it was suggested that it might be preferable to change the register definitions to use u32. Most other subarches seem to use u32 for their register type, at least the ones which use a __REG macro (like the PXA) do. Nico indicated in the thread above that he wouldn't mind this patch. Changing the type required fixes for opposite warnings in the pxa2xx usb gadget code but that was the only new warning introduced on defconfig or lubbock, mainstone and our own PXA255 boards. Signed-off-by: Ian Campbell <icampbell@arcom.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
321 lines
8.3 KiB
C
321 lines
8.3 KiB
C
/*
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* linux/drivers/usb/gadget/pxa2xx_udc.h
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* Intel PXA2xx 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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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#ifndef __LINUX_USB_GADGET_PXA2XX_H
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#define __LINUX_USB_GADGET_PXA2XX_H
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#include <linux/types.h>
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/*-------------------------------------------------------------------------*/
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/* pxa2xx 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 pxa2xx_udc;
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struct pxa2xx_ep {
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struct usb_ep ep;
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struct pxa2xx_udc *dev;
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const struct usb_endpoint_descriptor *desc;
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struct list_head queue;
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unsigned long pio_irqs;
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unsigned long dma_irqs;
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short dma;
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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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volatile u32 *reg_udccs;
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volatile u32 *reg_ubcr;
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volatile u32 *reg_uddr;
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#ifdef USE_DMA
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volatile u32 *reg_drcmr;
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#define drcmr(n) .reg_drcmr = & DRCMR ## n ,
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#else
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#define drcmr(n)
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#endif
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};
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struct pxa2xx_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_PXA2XX_SMALL
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/* when memory's tight, SMALL config saves code+data. */
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#undef USE_DMA
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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 pxa2xx_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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#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 pxa2xx_udc_mach_info *mach;
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u64 dma_mask;
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struct pxa2xx_ep ep [PXA_UDC_NUM_ENDPOINTS];
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};
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/*-------------------------------------------------------------------------*/
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#ifdef CONFIG_ARCH_LUBBOCK
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#include <asm/arch/lubbock.h>
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/* lubbock can also report usb connect/disconnect irqs */
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#ifdef DEBUG
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#define HEX_DISPLAY(n) if (machine_is_lubbock()) { LUB_HEXLED = (n); }
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#endif
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#endif
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/*-------------------------------------------------------------------------*/
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/* LEDs are only for debug */
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#ifndef HEX_DISPLAY
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#define HEX_DISPLAY(n) do {} while(0)
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#endif
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#ifdef DEBUG
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#include <asm/leds.h>
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#define LED_CONNECTED_ON leds_event(led_green_on)
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#define LED_CONNECTED_OFF do { \
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leds_event(led_green_off); \
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HEX_DISPLAY(0); \
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} while(0)
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#endif
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#ifndef LED_CONNECTED_ON
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#define LED_CONNECTED_ON do {} while(0)
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#define LED_CONNECTED_OFF do {} while(0)
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#endif
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/*-------------------------------------------------------------------------*/
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static struct pxa2xx_udc *the_controller;
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/* one GPIO should be used to detect VBUS from the host */
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static inline int is_vbus_present(void)
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{
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if (!the_controller->mach->udc_is_connected)
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return 1;
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return the_controller->mach->udc_is_connected();
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}
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/* one GPIO should control a D+ pullup, so host sees this device (or not) */
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static inline void pullup_off(void)
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{
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if (!the_controller->mach->udc_command)
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return;
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the_controller->mach->udc_command(PXA2XX_UDC_CMD_DISCONNECT);
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}
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static inline void pullup_on(void)
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{
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if (!the_controller->mach->udc_command)
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return;
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the_controller->mach->udc_command(PXA2XX_UDC_CMD_CONNECT);
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}
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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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#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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#define DMSG(stuff...) printk(KERN_DEBUG "udc: " stuff)
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#ifdef VERBOSE
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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 __attribute__ ((__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 __attribute__ ((__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 void __attribute__ ((__unused__))
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dump_state(struct pxa2xx_udc *dev)
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{
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u32 tmp;
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unsigned i;
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DMSG("%s %s, uicr %02X.%02X, usir %02X.%02x, ufnr %02X.%02X\n",
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is_usb_connected() ? "host " : "disconnected",
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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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if (!is_usb_connected())
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return;
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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].desc == 0)
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continue;
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DMSG ("udccs%d = %02x\n", i, *dev->ep->reg_udccs);
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}
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}
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#else
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#define DMSG(stuff...) do{}while(0)
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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 WARN(stuff...) printk(KERN_WARNING "udc: " stuff)
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#define INFO(stuff...) printk(KERN_INFO "udc: " stuff)
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#endif /* __LINUX_USB_GADGET_PXA2XX_H */
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