q3k/linux
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity
linux/drivers/usb/gadget/at91_udc.h
David Brownell 8b2e76687b USB: AT91 UDC updates, mostly power management 
UDC updates for AT91 series processors:

 - Get ready for at91sam926x processors (ARMv5tej not ARMv4t)

 - Suspend/resume support now behaves properly

 - In "standby" mode, UDC can be a source of system wakeup events
   (host resume, device connect/disconnect, etc)

 - Fix IRQ storming issues, seemingly related to clock disabling
   changes that went in a while back

And minor cleanups, especially whitespace.

Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Andrew Victor  <andrew@sanpeople.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2006-08-02 16:41:41 -07:00

182 lines
6.1 KiB
C
Raw Blame History

/*
* Copyright (C) 2004 by Thomas Rathbone, HP Labs
* Copyright (C) 2005 by Ivan Kokshaysky
* Copyright (C) 2006 by SAN People
*
* 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 AT91_UDC_H
#define AT91_UDC_H
/*
* USB Device Port (UDP) registers.
* Based on AT91RM9200 datasheet revision E.
*/
#define AT91_UDP_FRM_NUM 0x00 /* Frame Number Register */
#define AT91_UDP_NUM (0x7ff << 0) /* Frame Number */
#define AT91_UDP_FRM_ERR (1 << 16) /* Frame Error */
#define AT91_UDP_FRM_OK (1 << 17) /* Frame OK */
#define AT91_UDP_GLB_STAT 0x04 /* Global State Register */
#define AT91_UDP_FADDEN (1 << 0) /* Function Address Enable */
#define AT91_UDP_CONFG (1 << 1) /* Configured */
#define AT91_UDP_ESR (1 << 2) /* Enable Send Resume */
#define AT91_UDP_RSMINPR (1 << 3) /* Resume has been sent */
#define AT91_UDP_RMWUPE (1 << 4) /* Remote Wake Up Enable */
#define AT91_UDP_FADDR 0x08 /* Function Address Register */
#define AT91_UDP_FADD (0x7f << 0) /* Function Address Value */
#define AT91_UDP_FEN (1 << 8) /* Function Enable */
#define AT91_UDP_IER 0x10 /* Interrupt Enable Register */
#define AT91_UDP_IDR 0x14 /* Interrupt Disable Register */
#define AT91_UDP_IMR 0x18 /* Interrupt Mask Register */
#define AT91_UDP_ISR 0x1c /* Interrupt Status Register */
#define AT91_UDP_EP(n) (1 << (n)) /* Endpoint Interrupt Status */
#define AT91_UDP_RXSUSP (1 << 8) /* USB Suspend Interrupt Status */
#define AT91_UDP_RXRSM (1 << 9) /* USB Resume Interrupt Status */
#define AT91_UDP_EXTRSM (1 << 10) /* External Resume Interrupt Status */
#define AT91_UDP_SOFINT (1 << 11) /* Start of Frame Interrupt Status */
#define AT91_UDP_ENDBUSRES (1 << 12) /* End of Bus Reset Interrpt Status */
#define AT91_UDP_WAKEUP (1 << 13) /* USB Wakeup Interrupt Status */
#define AT91_UDP_ICR 0x20 /* Interrupt Clear Register */
#define AT91_UDP_RST_EP 0x28 /* Reset Endpoint Register */
#define AT91_UDP_CSR(n) (0x30+((n)*4)) /* Endpoint Control/Status Registers 0-7 */
#define AT91_UDP_TXCOMP (1 << 0) /* Generates IN packet with data previously written in DPR */
#define AT91_UDP_RX_DATA_BK0 (1 << 1) /* Receive Data Bank 0 */
#define AT91_UDP_RXSETUP (1 << 2) /* Send STALL to the host */
#define AT91_UDP_STALLSENT (1 << 3) /* Stall Sent / Isochronous error (Isochronous endpoints) */
#define AT91_UDP_TXPKTRDY (1 << 4) /* Transmit Packet Ready */
#define AT91_UDP_FORCESTALL (1 << 5) /* Force Stall */
#define AT91_UDP_RX_DATA_BK1 (1 << 6) /* Receive Data Bank 1 */
#define AT91_UDP_DIR (1 << 7) /* Transfer Direction */
#define AT91_UDP_EPTYPE (7 << 8) /* Endpoint Type */
#define AT91_UDP_EPTYPE_CTRL (0 << 8)
#define AT91_UDP_EPTYPE_ISO_OUT (1 << 8)
#define AT91_UDP_EPTYPE_BULK_OUT (2 << 8)
#define AT91_UDP_EPTYPE_INT_OUT (3 << 8)
#define AT91_UDP_EPTYPE_ISO_IN (5 << 8)
#define AT91_UDP_EPTYPE_BULK_IN (6 << 8)
#define AT91_UDP_EPTYPE_INT_IN (7 << 8)
#define AT91_UDP_DTGLE (1 << 11) /* Data Toggle */
#define AT91_UDP_EPEDS (1 << 15) /* Endpoint Enable/Disable */
#define AT91_UDP_RXBYTECNT (0x7ff << 16) /* Number of bytes in FIFO */
#define AT91_UDP_FDR(n) (0x50+((n)*4)) /* Endpoint FIFO Data Registers 0-7 */
#define AT91_UDP_TXVC 0x74 /* Transceiver Control Register */
#define AT91_UDP_TXVC_TXVDIS (1 << 8) /* Transceiver Disable */
/*-------------------------------------------------------------------------*/
/*
* controller driver data structures
*/
#define NUM_ENDPOINTS 6
/*
* hardware won't disable bus reset, or resume while the controller
* is suspended ... watching suspend helps keep the logic symmetric.
*/
#define MINIMUS_INTERRUPTUS \
(AT91_UDP_ENDBUSRES | AT91_UDP_RXRSM | AT91_UDP_RXSUSP)
struct at91_ep {
struct usb_ep ep;
struct list_head queue;
struct at91_udc *udc;
void __iomem *creg;
unsigned maxpacket:16;
u8 int_mask;
unsigned is_pingpong:1;
unsigned stopped:1;
unsigned is_in:1;
unsigned is_iso:1;
unsigned fifo_bank:1;
const struct usb_endpoint_descriptor
*desc;
};
/*
* driver is non-SMP, and just blocks IRQs whenever it needs
* access protection for chip registers or driver state
*/
struct at91_udc {
struct usb_gadget gadget;
struct at91_ep ep[NUM_ENDPOINTS];
struct usb_gadget_driver *driver;
unsigned vbus:1;
unsigned enabled:1;
unsigned clocked:1;
unsigned suspended:1;
unsigned req_pending:1;
unsigned wait_for_addr_ack:1;
unsigned wait_for_config_ack:1;
unsigned selfpowered:1;
u8 addr;
struct at91_udc_data board;
struct clk *iclk, *fclk;
struct platform_device *pdev;
struct proc_dir_entry *pde;
int udp_irq;
};
static inline struct at91_udc *to_udc(struct usb_gadget *g)
{
return container_of(g, struct at91_udc, gadget);
}
struct at91_request {
struct usb_request req;
struct list_head queue;
};
/*-------------------------------------------------------------------------*/
#ifdef DEBUG
#define DBG(stuff...) printk(KERN_DEBUG "udc: " stuff)
#else
#define DBG(stuff...) do{}while(0)
#endif
#ifdef VERBOSE
# define VDBG DBG
#else
# define VDBG(stuff...) do{}while(0)
#endif
#ifdef PACKET_TRACE
# define PACKET VDBG
#else
# define PACKET(stuff...) do{}while(0)
#endif
#define ERR(stuff...) printk(KERN_ERR "udc: " stuff)
#define WARN(stuff...) printk(KERN_WARNING "udc: " stuff)
#define INFO(stuff...) printk(KERN_INFO "udc: " stuff)
#endif
Reference in a new issue View git blame Copy permalink