bae4bd848d
This adds support for the USB peripheral controller on AT91 (rm9200, eventually also sam9261 or uClinux) platforms. More SOC support for Linux-USB ... an uncomplicated pure PIO driver. It'd be worth using this as a model, if you're starting a driver for some other peripheral controller. Signed-off-by: David Brownell <dbrownell@users.sourceforge.net> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
181 lines
6 KiB
C
181 lines
6 KiB
C
/*
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* Copyright (C) 2004 by Thomas Rathbone, HP Labs
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* Copyright (C) 2005 by Ivan Kokshaysky
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* Copyright (C) 2006 by SAN People
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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
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* Free Software Foundation, Inc.,
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* 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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#ifndef AT91_UDC_H
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#define AT91_UDC_H
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/*
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* USB Device Port (UDP) registers.
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* Based on AT91RM9200 datasheet revision E.
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*/
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#define AT91_UDP_FRM_NUM 0x00 /* Frame Number Register */
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#define AT91_UDP_NUM (0x7ff << 0) /* Frame Number */
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#define AT91_UDP_FRM_ERR (1 << 16) /* Frame Error */
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#define AT91_UDP_FRM_OK (1 << 17) /* Frame OK */
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#define AT91_UDP_GLB_STAT 0x04 /* Global State Register */
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#define AT91_UDP_FADDEN (1 << 0) /* Function Address Enable */
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#define AT91_UDP_CONFG (1 << 1) /* Configured */
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#define AT91_UDP_ESR (1 << 2) /* Enable Send Resume */
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#define AT91_UDP_RSMINPR (1 << 3) /* Resume has been sent */
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#define AT91_UDP_RMWUPE (1 << 4) /* Remote Wake Up Enable */
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#define AT91_UDP_FADDR 0x08 /* Function Address Register */
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#define AT91_UDP_FADD (0x7f << 0) /* Function Address Value */
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#define AT91_UDP_FEN (1 << 8) /* Function Enable */
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#define AT91_UDP_IER 0x10 /* Interrupt Enable Register */
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#define AT91_UDP_IDR 0x14 /* Interrupt Disable Register */
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#define AT91_UDP_IMR 0x18 /* Interrupt Mask Register */
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#define AT91_UDP_ISR 0x1c /* Interrupt Status Register */
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#define AT91_UDP_EP(n) (1 << (n)) /* Endpoint Interrupt Status */
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#define AT91_UDP_RXSUSP (1 << 8) /* USB Suspend Interrupt Status */
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#define AT91_UDP_RXRSM (1 << 9) /* USB Resume Interrupt Status */
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#define AT91_UDP_EXTRSM (1 << 10) /* External Resume Interrupt Status */
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#define AT91_UDP_SOFINT (1 << 11) /* Start of Frame Interrupt Status */
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#define AT91_UDP_ENDBUSRES (1 << 12) /* End of Bus Reset Interrpt Status */
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#define AT91_UDP_WAKEUP (1 << 13) /* USB Wakeup Interrupt Status */
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#define AT91_UDP_ICR 0x20 /* Interrupt Clear Register */
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#define AT91_UDP_RST_EP 0x28 /* Reset Endpoint Register */
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#define AT91_UDP_CSR(n) (0x30+((n)*4)) /* Endpoint Control/Status Registers 0-7 */
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#define AT91_UDP_TXCOMP (1 << 0) /* Generates IN packet with data previously written in DPR */
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#define AT91_UDP_RX_DATA_BK0 (1 << 1) /* Receive Data Bank 0 */
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#define AT91_UDP_RXSETUP (1 << 2) /* Send STALL to the host */
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#define AT91_UDP_STALLSENT (1 << 3) /* Stall Sent / Isochronous error (Isochronous endpoints) */
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#define AT91_UDP_TXPKTRDY (1 << 4) /* Transmit Packet Ready */
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#define AT91_UDP_FORCESTALL (1 << 5) /* Force Stall */
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#define AT91_UDP_RX_DATA_BK1 (1 << 6) /* Receive Data Bank 1 */
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#define AT91_UDP_DIR (1 << 7) /* Transfer Direction */
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#define AT91_UDP_EPTYPE (7 << 8) /* Endpoint Type */
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#define AT91_UDP_EPTYPE_CTRL (0 << 8)
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#define AT91_UDP_EPTYPE_ISO_OUT (1 << 8)
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#define AT91_UDP_EPTYPE_BULK_OUT (2 << 8)
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#define AT91_UDP_EPTYPE_INT_OUT (3 << 8)
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#define AT91_UDP_EPTYPE_ISO_IN (5 << 8)
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#define AT91_UDP_EPTYPE_BULK_IN (6 << 8)
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#define AT91_UDP_EPTYPE_INT_IN (7 << 8)
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#define AT91_UDP_DTGLE (1 << 11) /* Data Toggle */
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#define AT91_UDP_EPEDS (1 << 15) /* Endpoint Enable/Disable */
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#define AT91_UDP_RXBYTECNT (0x7ff << 16) /* Number of bytes in FIFO */
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#define AT91_UDP_FDR(n) (0x50+((n)*4)) /* Endpoint FIFO Data Registers 0-7 */
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#define AT91_UDP_TXVC 0x74 /* Transceiver Control Register */
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#define AT91_UDP_TXVC_TXVDIS (1 << 8) /* Transceiver Disable */
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/*-------------------------------------------------------------------------*/
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/*
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* controller driver data structures
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*/
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#define NUM_ENDPOINTS 6
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/*
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* hardware won't disable bus reset, or resume while the controller
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* is suspended ... watching suspend helps keep the logic symmetric.
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*/
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#define MINIMUS_INTERRUPTUS \
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(AT91_UDP_ENDBUSRES | AT91_UDP_RXRSM | AT91_UDP_RXSUSP)
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struct at91_ep {
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struct usb_ep ep;
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struct list_head queue;
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struct at91_udc *udc;
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void __iomem *creg;
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unsigned maxpacket:16;
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u8 int_mask;
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unsigned is_pingpong:1;
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unsigned stopped:1;
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unsigned is_in:1;
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unsigned is_iso:1;
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unsigned fifo_bank:1;
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const struct usb_endpoint_descriptor
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*desc;
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};
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/*
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* driver is non-SMP, and just blocks IRQs whenever it needs
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* access protection for chip registers or driver state
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*/
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struct at91_udc {
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struct usb_gadget gadget;
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struct at91_ep ep[NUM_ENDPOINTS];
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struct usb_gadget_driver *driver;
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unsigned vbus:1;
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unsigned enabled:1;
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unsigned clocked:1;
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unsigned suspended:1;
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unsigned req_pending:1;
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unsigned wait_for_addr_ack:1;
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unsigned wait_for_config_ack:1;
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unsigned selfpowered:1;
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u8 addr;
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struct at91_udc_data board;
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struct clk *iclk, *fclk;
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struct platform_device *pdev;
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struct proc_dir_entry *pde;
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};
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static inline struct at91_udc *to_udc(struct usb_gadget *g)
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{
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return container_of(g, struct at91_udc, gadget);
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}
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struct at91_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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/*-------------------------------------------------------------------------*/
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#ifdef DEBUG
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#define DBG(stuff...) printk(KERN_DEBUG "udc: " stuff)
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#else
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#define DBG(stuff...) do{}while(0)
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#endif
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#ifdef VERBOSE
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# define VDBG DBG
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#else
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# define VDBG(stuff...) do{}while(0)
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#endif
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#ifdef PACKET_TRACE
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# define PACKET VDBG
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#else
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# define PACKET(stuff...) do{}while(0)
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#endif
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#define ERR(stuff...) printk(KERN_ERR "udc: " stuff)
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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
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