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// SPDX-License-Identifier: GPL-2.0
/*
* Toshiba TC86C001 ("Goku-S") USB Device Controller driver
*
* Copyright (C) 2000-2002 Lineo
* by Stuart Lynne, Tom Rushworth, and Bruce Balden
* Copyright (C) 2002 Toshiba Corporation
* Copyright (C) 2003 MontaVista Software (source@mvista.com)
*
* This file is licensed under the terms of the GNU General Public
* License version 2. This program is licensed "as is" without any
* warranty of any kind, whether express or implied.
*/
/*
* PCI BAR 0 points to these registers.
*/
struct goku_udc_regs {
/* irq management */
u32 int_status; /* 0x000 */
u32 int_enable;
#define INT_SUSPEND 0x00001 /* or resume */
#define INT_USBRESET 0x00002
#define INT_ENDPOINT0 0x00004
#define INT_SETUP 0x00008
#define INT_STATUS 0x00010
#define INT_STATUSNAK 0x00020
#define INT_EPxDATASET(n) (0x00020 << (n)) /* 0 < n < 4 */
# define INT_EP1DATASET 0x00040
# define INT_EP2DATASET 0x00080
# define INT_EP3DATASET 0x00100
#define INT_EPnNAK(n) (0x00100 < (n)) /* 0 < n < 4 */
# define INT_EP1NAK 0x00200
# define INT_EP2NAK 0x00400
# define INT_EP3NAK 0x00800
#define INT_SOF 0x01000
#define INT_ERR 0x02000
#define INT_MSTWRSET 0x04000
#define INT_MSTWREND 0x08000
#define INT_MSTWRTMOUT 0x10000
#define INT_MSTRDEND 0x20000
#define INT_SYSERROR 0x40000
#define INT_PWRDETECT 0x80000
#define INT_DEVWIDE \
(INT_PWRDETECT|INT_SYSERROR/*|INT_ERR*/|INT_USBRESET|INT_SUSPEND)
#define INT_EP0 \
(INT_SETUP|INT_ENDPOINT0/*|INT_STATUS*/|INT_STATUSNAK)
u32 dma_master;
#define MST_EOPB_DIS 0x0800
#define MST_EOPB_ENA 0x0400
#define MST_TIMEOUT_DIS 0x0200
#define MST_TIMEOUT_ENA 0x0100
#define MST_RD_EOPB 0x0080 /* write-only */
#define MST_RD_RESET 0x0040
#define MST_WR_RESET 0x0020
#define MST_RD_ENA 0x0004 /* 1:start, 0:ignore */
#define MST_WR_ENA 0x0002 /* 1:start, 0:ignore */
#define MST_CONNECTION 0x0001 /* 0 for ep1out/ep2in */
#define MST_R_BITS (MST_EOPB_DIS|MST_EOPB_ENA \
|MST_RD_ENA|MST_RD_RESET)
#define MST_W_BITS (MST_TIMEOUT_DIS|MST_TIMEOUT_ENA \
|MST_WR_ENA|MST_WR_RESET)
#define MST_RW_BITS (MST_R_BITS|MST_W_BITS \
|MST_CONNECTION)
/* these values assume (dma_master & MST_CONNECTION) == 0 */
#define UDC_MSTWR_ENDPOINT 1
#define UDC_MSTRD_ENDPOINT 2
/* dma master write */
u32 out_dma_start;
u32 out_dma_end;
u32 out_dma_current;
/* dma master read */
u32 in_dma_start;
u32 in_dma_end;
u32 in_dma_current;
u32 power_detect;
#define PW_DETECT 0x04
#define PW_RESETB 0x02
#define PW_PULLUP 0x01
u8 _reserved0 [0x1d8];
/* endpoint registers */
u32 ep_fifo [4]; /* 0x200 */
u8 _reserved1 [0x10];
u32 ep_mode [4]; /* only 1-3 valid */
u8 _reserved2 [0x10];
u32 ep_status [4];
#define EPxSTATUS_TOGGLE 0x40
#define EPxSTATUS_SUSPEND 0x20
#define EPxSTATUS_EP_MASK (0x07<<2)
# define EPxSTATUS_EP_READY (0<<2)
# define EPxSTATUS_EP_DATAIN (1<<2)
# define EPxSTATUS_EP_FULL (2<<2)
# define EPxSTATUS_EP_TX_ERR (3<<2)
# define EPxSTATUS_EP_RX_ERR (4<<2)
# define EPxSTATUS_EP_BUSY (5<<2)
# define EPxSTATUS_EP_STALL (6<<2)
# define EPxSTATUS_EP_INVALID (7<<2)
#define EPxSTATUS_FIFO_DISABLE 0x02
#define EPxSTATUS_STAGE_ERROR 0x01
u8 _reserved3 [0x10];
u32 EPxSizeLA[4];
#define PACKET_ACTIVE (1<<7)
#define DATASIZE 0x7f
u8 _reserved3a [0x10];
u32 EPxSizeLB[4]; /* only 1,2 valid */
u8 _reserved3b [0x10];
u32 EPxSizeHA[4]; /* only 1-3 valid */
u8 _reserved3c [0x10];
u32 EPxSizeHB[4]; /* only 1,2 valid */
u8 _reserved4[0x30];
/* SETUP packet contents */
u32 bRequestType; /* 0x300 */
u32 bRequest;
u32 wValueL;
u32 wValueH;
u32 wIndexL;
u32 wIndexH;
u32 wLengthL;
u32 wLengthH;
/* command interaction/handshaking */
u32 SetupRecv; /* 0x320 */
u32 CurrConfig;
u32 StdRequest;
u32 Request;
u32 DataSet;
#define DATASET_A(epnum) (1<<(2*(epnum)))
#define DATASET_B(epnum) (2<<(2*(epnum)))
#define DATASET_AB(epnum) (3<<(2*(epnum)))
u8 _reserved5[4];
u32 UsbState;
#define USBSTATE_CONFIGURED 0x04
#define USBSTATE_ADDRESSED 0x02
#define USBSTATE_DEFAULT 0x01
u32 EOP;
u32 Command; /* 0x340 */
#define COMMAND_SETDATA0 2
#define COMMAND_RESET 3
#define COMMAND_STALL 4
#define COMMAND_INVALID 5
#define COMMAND_FIFO_DISABLE 7
#define COMMAND_FIFO_ENABLE 8
#define COMMAND_INIT_DESCRIPTOR 9
#define COMMAND_FIFO_CLEAR 10 /* also stall */
#define COMMAND_STALL_CLEAR 11
#define COMMAND_EP(n) ((n) << 4)
u32 EPxSingle;
u8 _reserved6[4];
u32 EPxBCS;
u8 _reserved7[8];
u32 IntControl;
#define ICONTROL_STATUSNAK 1
u8 _reserved8[4];
u32 reqmode; // 0x360 standard request mode, low 8 bits
#define G_REQMODE_SET_INTF (1<<7)
#define G_REQMODE_GET_INTF (1<<6)
#define G_REQMODE_SET_CONF (1<<5)
#define G_REQMODE_GET_CONF (1<<4)
#define G_REQMODE_GET_DESC (1<<3)
#define G_REQMODE_SET_FEAT (1<<2)
#define G_REQMODE_CLEAR_FEAT (1<<1)
#define G_REQMODE_GET_STATUS (1<<0)
u32 ReqMode;
u8 _reserved9[0x18];
u32 PortStatus; /* 0x380 */
u8 _reserved10[8];
u32 address;
u32 buff_test;
u8 _reserved11[4];
u32 UsbReady;
u8 _reserved12[4];
u32 SetDescStall; /* 0x3a0 */
u8 _reserved13[0x45c];
/* hardware could handle limited GET_DESCRIPTOR duties */
#define DESC_LEN 0x80
u32 descriptors[DESC_LEN]; /* 0x800 */
u8 _reserved14[0x600];
} __attribute__ ((packed));
#define MAX_FIFO_SIZE 64
#define MAX_EP0_SIZE 8 /* ep0 fifo is bigger, though */
/*-------------------------------------------------------------------------*/
/* DRIVER DATA STRUCTURES and UTILITIES */
struct goku_ep {
struct usb_ep ep;
struct goku_udc *dev;
unsigned long irqs;
unsigned num:8,
dma:1,
is_in:1,
stopped:1;
/* analogous to a host-side qh */
struct list_head queue;
u32 __iomem *reg_fifo;
u32 __iomem *reg_mode;
u32 __iomem *reg_status;
};
struct goku_request {
struct usb_request req;
struct list_head queue;
unsigned mapped:1;
};
enum ep0state {
EP0_DISCONNECT, /* no host */
EP0_IDLE, /* between STATUS ack and SETUP report */
EP0_IN, EP0_OUT, /* data stage */
EP0_STATUS, /* status stage */
EP0_STALL, /* data or status stages */
EP0_SUSPEND, /* usb suspend */
};
struct goku_udc {
/* each pci device provides one gadget, several endpoints */
struct usb_gadget gadget;
spinlock_t lock;
struct goku_ep ep[4];
struct usb_gadget_driver *driver;
enum ep0state ep0state;
unsigned got_irq:1,
got_region:1,
req_config:1,
configured:1,
enabled:1;
/* pci state used to access those endpoints */
struct pci_dev *pdev;
struct goku_udc_regs __iomem *regs;
u32 int_enable;
/* statistics... */
unsigned long irqs;
};
#define to_goku_udc(g) (container_of((g), struct goku_udc, gadget))
/*-------------------------------------------------------------------------*/
#define xprintk(dev,level,fmt,args...) \
printk(level "%s %s: " fmt , driver_name , \
pci_name(dev->pdev) , ## args)
#ifdef DEBUG
#define DBG(dev,fmt,args...) \
xprintk(dev , KERN_DEBUG , fmt , ## args)
#else
#define DBG(dev,fmt,args...) \
do { } while (0)
#endif /* DEBUG */
#ifdef VERBOSE
#define VDBG DBG
#else
#define VDBG(dev,fmt,args...) \
do { } while (0)
#endif /* VERBOSE */
#define ERROR(dev,fmt,args...) \
xprintk(dev , KERN_ERR , fmt , ## args)
#define WARNING(dev,fmt,args...) \
xprintk(dev , KERN_WARNING , fmt , ## args)
#define INFO(dev,fmt,args...) \
xprintk(dev , KERN_INFO , fmt , ## args)
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