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      1 /* SPDX-License-Identifier: GPL-2.0+ */
      2 /*
      3  * Intel PXA25x on-chip full speed USB device controller
      4  *
      5  * Copyright (C) 2003 Robert Schwebel <r.schwebel (at) pengutronix.de>, Pengutronix
      6  * Copyright (C) 2003 David Brownell
      7  * Copyright (C) 2012 Lukasz Dalek <luk0104 (at) gmail.com>
      8  */
      9 
     10 #ifndef __LINUX_USB_GADGET_PXA25X_H
     11 #define __LINUX_USB_GADGET_PXA25X_H
     12 
     13 #include <linux/types.h>
     14 #include <asm/arch/regs-usb.h>
     15 
     16 /*
     17  * Prefetching support - only ARMv5.
     18  */
     19 
     20 #ifdef ARCH_HAS_PREFETCH
     21 static inline void prefetch(const void *ptr)
     22 {
     23 	__asm__ __volatile__(
     24 		"pld\t%a0"
     25 		:
     26 		: "p" (ptr)
     27 		: "cc");
     28 }
     29 
     30 #define prefetchw(ptr)	prefetch(ptr)
     31 #endif /* ARCH_HAS_PREFETCH */
     32 
     33 /*-------------------------------------------------------------------------*/
     34 
     35 #define UDC_REGS	((struct pxa25x_udc_regs *)PXA25X_UDC_BASE)
     36 
     37 /*-------------------------------------------------------------------------*/
     38 
     39 struct pxa2xx_udc_mach_info {
     40 	int  (*udc_is_connected)(void);		/* do we see host? */
     41 	void (*udc_command)(int cmd);
     42 #define	PXA2XX_UDC_CMD_CONNECT		0	/* let host see us */
     43 #define	PXA2XX_UDC_CMD_DISCONNECT	1	/* so host won't see us */
     44 };
     45 
     46 struct pxa25x_udc;
     47 
     48 struct pxa25x_ep {
     49 	struct usb_ep				ep;
     50 	struct pxa25x_udc			*dev;
     51 
     52 	const struct usb_endpoint_descriptor	*desc;
     53 	struct list_head			queue;
     54 	unsigned long				pio_irqs;
     55 
     56 	unsigned short				fifo_size;
     57 	u8					bEndpointAddress;
     58 	u8					bmAttributes;
     59 
     60 	unsigned				stopped:1;
     61 
     62 	/* UDCCS = UDC Control/Status for this EP
     63 	 * UBCR = UDC Byte Count Remaining (contents of OUT fifo)
     64 	 * UDDR = UDC Endpoint Data Register (the fifo)
     65 	 * DRCM = DMA Request Channel Map
     66 	 */
     67 	u32					*reg_udccs;
     68 	u32					*reg_ubcr;
     69 	u32					*reg_uddr;
     70 };
     71 
     72 struct pxa25x_request {
     73 	struct usb_request			req;
     74 	struct list_head			queue;
     75 };
     76 
     77 enum ep0_state {
     78 	EP0_IDLE,
     79 	EP0_IN_DATA_PHASE,
     80 	EP0_OUT_DATA_PHASE,
     81 	EP0_END_XFER,
     82 	EP0_STALL,
     83 };
     84 
     85 #define EP0_FIFO_SIZE	16U
     86 #define BULK_FIFO_SIZE	64U
     87 #define ISO_FIFO_SIZE	256U
     88 #define INT_FIFO_SIZE	8U
     89 
     90 struct udc_stats {
     91 	struct ep0stats {
     92 		unsigned long		ops;
     93 		unsigned long		bytes;
     94 	} read, write;
     95 	unsigned long			irqs;
     96 };
     97 
     98 #ifdef CONFIG_USB_PXA25X_SMALL
     99 /* when memory's tight, SMALL config saves code+data.  */
    100 #define	PXA_UDC_NUM_ENDPOINTS	3
    101 #endif
    102 
    103 #ifndef	PXA_UDC_NUM_ENDPOINTS
    104 #define	PXA_UDC_NUM_ENDPOINTS	16
    105 #endif
    106 
    107 struct pxa25x_watchdog {
    108 	unsigned				running:1;
    109 	ulong					period;
    110 	ulong					base;
    111 	struct pxa25x_udc			*udc;
    112 
    113 	void (*function)(struct pxa25x_udc *udc);
    114 };
    115 
    116 struct pxa25x_udc {
    117 	struct usb_gadget			gadget;
    118 	struct usb_gadget_driver		*driver;
    119 	struct pxa25x_udc_regs			*regs;
    120 
    121 	enum ep0_state				ep0state;
    122 	struct udc_stats			stats;
    123 	unsigned				got_irq:1,
    124 						pullup:1,
    125 						has_cfr:1,
    126 						req_pending:1,
    127 						req_std:1,
    128 						req_config:1,
    129 						active:1;
    130 
    131 	struct clk				*clk;
    132 	struct pxa2xx_udc_mach_info		*mach;
    133 	u64					dma_mask;
    134 	struct pxa25x_ep			ep[PXA_UDC_NUM_ENDPOINTS];
    135 
    136 	struct pxa25x_watchdog			watchdog;
    137 };
    138 
    139 /*-------------------------------------------------------------------------*/
    140 
    141 static struct pxa25x_udc *the_controller;
    142 
    143 /*-------------------------------------------------------------------------*/
    144 
    145 #ifndef DEBUG
    146 # define NOISY 0
    147 #endif
    148 
    149 #endif /* __LINUX_USB_GADGET_PXA25X_H */
    150