diff options
Diffstat (limited to 'drivers/usb/gadget/net2280.h')
| -rw-r--r-- | drivers/usb/gadget/net2280.h | 308 |
1 files changed, 308 insertions, 0 deletions
diff --git a/drivers/usb/gadget/net2280.h b/drivers/usb/gadget/net2280.h new file mode 100644 index 00000000..a844be0d --- /dev/null +++ b/drivers/usb/gadget/net2280.h @@ -0,0 +1,308 @@ +/* + * NetChip 2280 high/full speed USB device controller. + * Unlike many such controllers, this one talks PCI. + */ + +/* + * Copyright (C) 2002 NetChip Technology, Inc. (http://www.netchip.com) + * Copyright (C) 2003 David Brownell + * + * 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. + */ + +#include <linux/usb/net2280.h> + +/*-------------------------------------------------------------------------*/ + +#ifdef __KERNEL__ + +/* indexed registers [11.10] are accessed indirectly + * caller must own the device lock. + */ + +static inline u32 +get_idx_reg (struct net2280_regs __iomem *regs, u32 index) +{ + writel (index, ®s->idxaddr); + /* NOTE: synchs device/cpu memory views */ + return readl (®s->idxdata); +} + +static inline void +set_idx_reg (struct net2280_regs __iomem *regs, u32 index, u32 value) +{ + writel (index, ®s->idxaddr); + writel (value, ®s->idxdata); + /* posted, may not be visible yet */ +} + +#endif /* __KERNEL__ */ + + +#define REG_DIAG 0x0 +#define RETRY_COUNTER 16 +#define FORCE_PCI_SERR 11 +#define FORCE_PCI_INTERRUPT 10 +#define FORCE_USB_INTERRUPT 9 +#define FORCE_CPU_INTERRUPT 8 +#define ILLEGAL_BYTE_ENABLES 5 +#define FAST_TIMES 4 +#define FORCE_RECEIVE_ERROR 2 +#define FORCE_TRANSMIT_CRC_ERROR 0 +#define REG_FRAME 0x02 /* from last sof */ +#define REG_CHIPREV 0x03 /* in bcd */ +#define REG_HS_NAK_RATE 0x0a /* NAK per N uframes */ + +#define CHIPREV_1 0x0100 +#define CHIPREV_1A 0x0110 + +#ifdef __KERNEL__ + +/* ep a-f highspeed and fullspeed maxpacket, addresses + * computed from ep->num + */ +#define REG_EP_MAXPKT(dev,num) (((num) + 1) * 0x10 + \ + (((dev)->gadget.speed == USB_SPEED_HIGH) ? 0 : 1)) + +/*-------------------------------------------------------------------------*/ + +/* [8.3] for scatter/gather i/o + * use struct net2280_dma_regs bitfields + */ +struct net2280_dma { + __le32 dmacount; + __le32 dmaaddr; /* the buffer */ + __le32 dmadesc; /* next dma descriptor */ + __le32 _reserved; +} __attribute__ ((aligned (16))); + +/*-------------------------------------------------------------------------*/ + +/* DRIVER DATA STRUCTURES and UTILITIES */ + +struct net2280_ep { + struct usb_ep ep; + struct net2280_ep_regs __iomem *regs; + struct net2280_dma_regs __iomem *dma; + struct net2280_dma *dummy; + dma_addr_t td_dma; /* of dummy */ + struct net2280 *dev; + unsigned long irqs; + + /* analogous to a host-side qh */ + struct list_head queue; + const struct usb_endpoint_descriptor *desc; + unsigned num : 8, + fifo_size : 12, + in_fifo_validate : 1, + out_overflow : 1, + stopped : 1, + wedged : 1, + is_in : 1, + is_iso : 1, + responded : 1; +}; + +static inline void allow_status (struct net2280_ep *ep) +{ + /* ep0 only */ + writel ( (1 << CLEAR_CONTROL_STATUS_PHASE_HANDSHAKE) + | (1 << CLEAR_NAK_OUT_PACKETS) + | (1 << CLEAR_NAK_OUT_PACKETS_MODE) + , &ep->regs->ep_rsp); + ep->stopped = 1; +} + +/* count (<= 4) bytes in the next fifo write will be valid */ +static inline void set_fifo_bytecount (struct net2280_ep *ep, unsigned count) +{ + writeb (count, 2 + (u8 __iomem *) &ep->regs->ep_cfg); +} + +struct net2280_request { + struct usb_request req; + struct net2280_dma *td; + dma_addr_t td_dma; + struct list_head queue; + unsigned mapped : 1, + valid : 1; +}; + +struct net2280 { + /* each pci device provides one gadget, several endpoints */ + struct usb_gadget gadget; + spinlock_t lock; + struct net2280_ep ep [7]; + struct usb_gadget_driver *driver; + unsigned enabled : 1, + protocol_stall : 1, + softconnect : 1, + got_irq : 1, + region : 1; + u16 chiprev; + + /* pci state used to access those endpoints */ + struct pci_dev *pdev; + struct net2280_regs __iomem *regs; + struct net2280_usb_regs __iomem *usb; + struct net2280_pci_regs __iomem *pci; + struct net2280_dma_regs __iomem *dma; + struct net2280_dep_regs __iomem *dep; + struct net2280_ep_regs __iomem *epregs; + + struct pci_pool *requests; + // statistics... +}; + +static inline void set_halt (struct net2280_ep *ep) +{ + /* ep0 and bulk/intr endpoints */ + writel ( (1 << CLEAR_CONTROL_STATUS_PHASE_HANDSHAKE) + /* set NAK_OUT for erratum 0114 */ + | ((ep->dev->chiprev == CHIPREV_1) << SET_NAK_OUT_PACKETS) + | (1 << SET_ENDPOINT_HALT) + , &ep->regs->ep_rsp); +} + +static inline void clear_halt (struct net2280_ep *ep) +{ + /* ep0 and bulk/intr endpoints */ + writel ( (1 << CLEAR_ENDPOINT_HALT) + | (1 << CLEAR_ENDPOINT_TOGGLE) + /* unless the gadget driver left a short packet in the + * fifo, this reverses the erratum 0114 workaround. + */ + | ((ep->dev->chiprev == CHIPREV_1) << CLEAR_NAK_OUT_PACKETS) + , &ep->regs->ep_rsp); +} + +#ifdef USE_RDK_LEDS + +static inline void net2280_led_init (struct net2280 *dev) +{ + /* LED3 (green) is on during USB activity. note erratum 0113. */ + writel ((1 << GPIO3_LED_SELECT) + | (1 << GPIO3_OUTPUT_ENABLE) + | (1 << GPIO2_OUTPUT_ENABLE) + | (1 << GPIO1_OUTPUT_ENABLE) + | (1 << GPIO0_OUTPUT_ENABLE) + , &dev->regs->gpioctl); +} + +/* indicate speed with bi-color LED 0/1 */ +static inline +void net2280_led_speed (struct net2280 *dev, enum usb_device_speed speed) +{ + u32 val = readl (&dev->regs->gpioctl); + switch (speed) { + case USB_SPEED_HIGH: /* green */ + val &= ~(1 << GPIO0_DATA); + val |= (1 << GPIO1_DATA); + break; + case USB_SPEED_FULL: /* red */ + val &= ~(1 << GPIO1_DATA); + val |= (1 << GPIO0_DATA); + break; + default: /* (off/black) */ + val &= ~((1 << GPIO1_DATA) | (1 << GPIO0_DATA)); + break; + } + writel (val, &dev->regs->gpioctl); +} + +/* indicate power with LED 2 */ +static inline void net2280_led_active (struct net2280 *dev, int is_active) +{ + u32 val = readl (&dev->regs->gpioctl); + + // FIXME this LED never seems to turn on. + if (is_active) + val |= GPIO2_DATA; + else + val &= ~GPIO2_DATA; + writel (val, &dev->regs->gpioctl); +} +static inline void net2280_led_shutdown (struct net2280 *dev) +{ + /* turn off all four GPIO*_DATA bits */ + writel (readl (&dev->regs->gpioctl) & ~0x0f, + &dev->regs->gpioctl); +} + +#else + +#define net2280_led_init(dev) do { } while (0) +#define net2280_led_speed(dev, speed) do { } while (0) +#define net2280_led_shutdown(dev) do { } while (0) + +#endif + +/*-------------------------------------------------------------------------*/ + +#define xprintk(dev,level,fmt,args...) \ + printk(level "%s %s: " fmt , driver_name , \ + pci_name(dev->pdev) , ## args) + +#ifdef DEBUG +#undef DEBUG +#define DEBUG(dev,fmt,args...) \ + xprintk(dev , KERN_DEBUG , fmt , ## args) +#else +#define DEBUG(dev,fmt,args...) \ + do { } while (0) +#endif /* DEBUG */ + +#ifdef VERBOSE +#define VDEBUG DEBUG +#else +#define VDEBUG(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) + +/*-------------------------------------------------------------------------*/ + +static inline void start_out_naking (struct net2280_ep *ep) +{ + /* NOTE: hardware races lurk here, and PING protocol issues */ + writel ((1 << SET_NAK_OUT_PACKETS), &ep->regs->ep_rsp); + /* synch with device */ + readl (&ep->regs->ep_rsp); +} + +#ifdef DEBUG +static inline void assert_out_naking (struct net2280_ep *ep, const char *where) +{ + u32 tmp = readl (&ep->regs->ep_stat); + + if ((tmp & (1 << NAK_OUT_PACKETS)) == 0) { + DEBUG (ep->dev, "%s %s %08x !NAK\n", + ep->ep.name, where, tmp); + writel ((1 << SET_NAK_OUT_PACKETS), + &ep->regs->ep_rsp); + } +} +#define ASSERT_OUT_NAKING(ep) assert_out_naking(ep,__func__) +#else +#define ASSERT_OUT_NAKING(ep) do {} while (0) +#endif + +static inline void stop_out_naking (struct net2280_ep *ep) +{ + u32 tmp; + + tmp = readl (&ep->regs->ep_stat); + if ((tmp & (1 << NAK_OUT_PACKETS)) != 0) + writel ((1 << CLEAR_NAK_OUT_PACKETS), &ep->regs->ep_rsp); +} + +#endif /* __KERNEL__ */ |