drivers/usb/gadget/udc/net2280.h - linux - Git at Google

 // SPDX-License-Identifier: GPL-2.0+
 /*
  * 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
  * Copyright (C) 2014 Ricardo Ribalda - Qtechnology/AS
  */

 #include <linux/usb/net2280.h>
 #include <linux/usb/usb338x.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, &regs->idxaddr);
 	/* NOTE:  synchs device/cpu memory views */
 	return readl(&regs->idxdata);
 }

 static inline void
 set_idx_reg(struct net2280_regs __iomem *regs, u32 index, u32 value)
 {
 	writel(index, &regs->idxaddr);
 	writel(value, &regs->idxdata);
 	/* posted, may not be visible yet */
 }

 #endif	/* __KERNEL__ */

 #define PCI_VENDOR_ID_PLX_LEGACY 0x17cc

 #define PLX_LEGACY		BIT(0)
 #define PLX_2280		BIT(1)
 #define PLX_SUPERSPEED		BIT(2)
 #define PLX_PCIE		BIT(3)

 #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

 /* DEFECT 7374 */
 #define DEFECT_7374_NUMBEROF_MAX_WAIT_LOOPS         200
 #define DEFECT_7374_PROCESSOR_WAIT_TIME             10

 /* ep0 max packet size */
 #define EP0_SS_MAX_PACKET_SIZE  0x200
 #define EP0_HS_MAX_PACKET_SIZE  0x40
 #ifdef	__KERNEL__

 /*-------------------------------------------------------------------------*/

 /* [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;
 } __aligned(16);

 /*-------------------------------------------------------------------------*/

 /* DRIVER DATA STRUCTURES and UTILITIES */

 struct net2280_ep {
 	struct usb_ep				ep;
 	struct net2280_ep_regs __iomem *cfg;
 	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(BIT(CLEAR_CONTROL_STATUS_PHASE_HANDSHAKE) |
 		BIT(CLEAR_NAK_OUT_PACKETS) |
 		BIT(CLEAR_NAK_OUT_PACKETS_MODE),
 		&ep->regs->ep_rsp);
 	ep->stopped = 1;
 }

 static inline void allow_status_338x(struct net2280_ep *ep)
 {
 	/*
 	 * Control Status Phase Handshake was set by the chip when the setup
 	 * packet arrived. While set, the chip automatically NAKs the host's
 	 * Status Phase tokens.
 	 */
 	writel(BIT(CLEAR_CONTROL_STATUS_PHASE_HANDSHAKE), &ep->regs->ep_rsp);

 	ep->stopped = 1;

 	/* TD 9.9 Halt Endpoint test.  TD 9.22 set feature test. */
 	ep->responded = 0;
 }

 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[9];
 	struct usb_gadget_driver	*driver;
 	unsigned			enabled : 1,
 					protocol_stall : 1,
 					softconnect : 1,
 					got_irq : 1,
 					region:1,
 					u1_enable:1,
 					u2_enable:1,
 					ltm_enable:1,
 					wakeup_enable:1,
 					addressed_state:1,
 					bug7734_patched:1;
 	u16				chiprev;
 	int enhanced_mode;
 	int n_ep;
 	kernel_ulong_t			quirks;


 	/* pci state used to access those endpoints */
 	struct pci_dev			*pdev;
 	struct net2280_regs		__iomem *regs;
 	struct net2280_usb_regs		__iomem *usb;
 	struct usb338x_usb_ext_regs	__iomem *usb_ext;
 	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 usb338x_ll_regs		__iomem *llregs;
 	struct usb338x_ll_lfps_regs	__iomem *ll_lfps_regs;
 	struct usb338x_ll_tsn_regs	__iomem *ll_tsn_regs;
 	struct usb338x_ll_chi_regs	__iomem *ll_chicken_reg;
 	struct usb338x_pl_regs		__iomem *plregs;

 	struct dma_pool			*requests;
 	/* statistics...*/
 };

 static inline void set_halt(struct net2280_ep *ep)
 {
 	/* ep0 and bulk/intr endpoints */
 	writel(BIT(CLEAR_CONTROL_STATUS_PHASE_HANDSHAKE) |
 		/* set NAK_OUT for erratum 0114 */
 		((ep->dev->chiprev == CHIPREV_1) << SET_NAK_OUT_PACKETS) |
 		BIT(SET_ENDPOINT_HALT),
 		&ep->regs->ep_rsp);
 }

 static inline void clear_halt(struct net2280_ep *ep)
 {
 	/* ep0 and bulk/intr endpoints */
 	writel(BIT(CLEAR_ENDPOINT_HALT) |
 		BIT(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);
 }

 /*
  * FSM value for Defect 7374 (U1U2 Test) is managed in
  * chip's SCRATCH register:
  */
 #define DEFECT7374_FSM_FIELD    28

 /* Waiting for Control Read:
  *  - A transition to this state indicates a fresh USB connection,
  *    before the first Setup Packet. The connection speed is not
  *    known. Firmware is waiting for the first Control Read.
  *  - Starting state: This state can be thought of as the FSM's typical
  *    starting state.
  *  - Tip: Upon the first SS Control Read the FSM never
  *    returns to this state.
  */
 #define DEFECT7374_FSM_WAITING_FOR_CONTROL_READ BIT(DEFECT7374_FSM_FIELD)

 /* Non-SS Control Read:
  *  - A transition to this state indicates detection of the first HS
  *    or FS Control Read.
  *  - Tip: Upon the first SS Control Read the FSM never
  *    returns to this state.
  */
 #define	DEFECT7374_FSM_NON_SS_CONTROL_READ (2 << DEFECT7374_FSM_FIELD)

 /* SS Control Read:
  *  - A transition to this state indicates detection of the
  *    first SS Control Read.
  *  - This state indicates workaround completion. Workarounds no longer
  *    need to be applied (as long as the chip remains powered up).
  *  - Tip: Once in this state the FSM state does not change (until
  *    the chip's power is lost and restored).
  *  - This can be thought of as the final state of the FSM;
  *    the FSM 'locks-up' in this state until the chip loses power.
  */
 #define DEFECT7374_FSM_SS_CONTROL_READ (3 << DEFECT7374_FSM_FIELD)

 #ifdef USE_RDK_LEDS

 static inline void net2280_led_init(struct net2280 *dev)
 {
 	/* LED3 (green) is on during USB activity. note erratum 0113. */
 	writel(BIT(GPIO3_LED_SELECT) |
 		BIT(GPIO3_OUTPUT_ENABLE) |
 		BIT(GPIO2_OUTPUT_ENABLE) |
 		BIT(GPIO1_OUTPUT_ENABLE) |
 		BIT(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_SUPER:		/* green + red */
 		val |= BIT(GPIO0_DATA) | BIT(GPIO1_DATA);
 		break;
 	case USB_SPEED_HIGH:		/* green */
 		val &= ~BIT(GPIO0_DATA);
 		val |= BIT(GPIO1_DATA);
 		break;
 	case USB_SPEED_FULL:		/* red */
 		val &= ~BIT(GPIO1_DATA);
 		val |= BIT(GPIO0_DATA);
 		break;
 	default:			/* (off/black) */
 		val &= ~(BIT(GPIO1_DATA) | BIT(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 ep_dbg(ndev, fmt, args...) \
 	dev_dbg((&((ndev)->pdev->dev)), fmt, ##args)

 #define ep_vdbg(ndev, fmt, args...) \
 	dev_vdbg((&((ndev)->pdev->dev)), fmt, ##args)

 #define ep_info(ndev, fmt, args...) \
 	dev_info((&((ndev)->pdev->dev)), fmt, ##args)

 #define ep_warn(ndev, fmt, args...) \
 	dev_warn((&((ndev)->pdev->dev)), fmt, ##args)

 #define ep_err(ndev, fmt, args...) \
 	dev_err((&((ndev)->pdev->dev)), fmt, ##args)

 /*-------------------------------------------------------------------------*/

 static inline void set_fifo_bytecount(struct net2280_ep *ep, unsigned count)
 {
 	if (ep->dev->pdev->vendor == 0x17cc)
 		writeb(count, 2 + (u8 __iomem *) &ep->regs->ep_cfg);
 	else{
 		u32 tmp = readl(&ep->cfg->ep_cfg) &
 					(~(0x07 << EP_FIFO_BYTE_COUNT));
 		writel(tmp | (count << EP_FIFO_BYTE_COUNT), &ep->cfg->ep_cfg);
 	}
 }

 static inline void start_out_naking(struct net2280_ep *ep)
 {
 	/* NOTE:  hardware races lurk here, and PING protocol issues */
 	writel(BIT(SET_NAK_OUT_PACKETS), &ep->regs->ep_rsp);
 	/* synch with device */
 	readl(&ep->regs->ep_rsp);
 }

 static inline void stop_out_naking(struct net2280_ep *ep)
 {
 	u32	tmp;

 	tmp = readl(&ep->regs->ep_stat);
 	if ((tmp & BIT(NAK_OUT_PACKETS)) != 0)
 		writel(BIT(CLEAR_NAK_OUT_PACKETS), &ep->regs->ep_rsp);
 }


 static inline void set_max_speed(struct net2280_ep *ep, u32 max)
 {
 	u32 reg;
 	static const u32 ep_enhanced[9] = { 0x10, 0x60, 0x30, 0x80,
 					  0x50, 0x20, 0x70, 0x40, 0x90 };

 	if (ep->dev->enhanced_mode) {
 		reg = ep_enhanced[ep->num];
 		switch (ep->dev->gadget.speed) {
 		case USB_SPEED_SUPER:
 			reg += 2;
 			break;
 		case USB_SPEED_FULL:
 			reg += 1;
 			break;
 		case USB_SPEED_HIGH:
 		default:
 			break;
 		}
 	} else {
 		reg = (ep->num + 1) * 0x10;
 		if (ep->dev->gadget.speed != USB_SPEED_HIGH)
 			reg += 1;
 	}

 	set_idx_reg(ep->dev->regs, reg, max);
 }

 #endif	/* __KERNEL__ */
	// SPDX-License-Identifier: GPL-2.0+
	/*
	* 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
	* Copyright (C) 2014 Ricardo Ribalda - Qtechnology/AS
	*/

	#include <linux/usb/net2280.h>
	#include <linux/usb/usb338x.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, &regs->idxaddr);
	/* NOTE: synchs device/cpu memory views */
	return readl(&regs->idxdata);
	}

	static inline void
	set_idx_reg(struct net2280_regs __iomem *regs, u32 index, u32 value)
	{
	writel(index, &regs->idxaddr);
	writel(value, &regs->idxdata);
	/* posted, may not be visible yet */
	}

	#endif /* __KERNEL__ */

	#define PCI_VENDOR_ID_PLX_LEGACY 0x17cc

	#define PLX_LEGACY BIT(0)
	#define PLX_2280 BIT(1)
	#define PLX_SUPERSPEED BIT(2)
	#define PLX_PCIE BIT(3)

	#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

	/* DEFECT 7374 */
	#define DEFECT_7374_NUMBEROF_MAX_WAIT_LOOPS 200
	#define DEFECT_7374_PROCESSOR_WAIT_TIME 10

	/* ep0 max packet size */
	#define EP0_SS_MAX_PACKET_SIZE 0x200
	#define EP0_HS_MAX_PACKET_SIZE 0x40
	#ifdef __KERNEL__

	/-------------------------------------------------------------------------/

	/* [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;
	} __aligned(16);

	/-------------------------------------------------------------------------/

	/* DRIVER DATA STRUCTURES and UTILITIES */

	struct net2280_ep {
	struct usb_ep ep;
	struct net2280_ep_regs __iomem *cfg;
	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(BIT(CLEAR_CONTROL_STATUS_PHASE_HANDSHAKE) \|
	BIT(CLEAR_NAK_OUT_PACKETS) \|
	BIT(CLEAR_NAK_OUT_PACKETS_MODE),
	&ep->regs->ep_rsp);
	ep->stopped = 1;
	}

	static inline void allow_status_338x(struct net2280_ep *ep)
	{
	/*
	* Control Status Phase Handshake was set by the chip when the setup
	* packet arrived. While set, the chip automatically NAKs the host's
	* Status Phase tokens.
	*/
	writel(BIT(CLEAR_CONTROL_STATUS_PHASE_HANDSHAKE), &ep->regs->ep_rsp);

	ep->stopped = 1;

	/* TD 9.9 Halt Endpoint test. TD 9.22 set feature test. */
	ep->responded = 0;
	}

	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[9];
	struct usb_gadget_driver *driver;
	unsigned enabled : 1,
	protocol_stall : 1,
	softconnect : 1,
	got_irq : 1,
	region:1,
	u1_enable:1,
	u2_enable:1,
	ltm_enable:1,
	wakeup_enable:1,
	addressed_state:1,
	bug7734_patched:1;
	u16 chiprev;
	int enhanced_mode;
	int n_ep;
	kernel_ulong_t quirks;


	/* pci state used to access those endpoints */
	struct pci_dev *pdev;
	struct net2280_regs __iomem *regs;
	struct net2280_usb_regs __iomem *usb;
	struct usb338x_usb_ext_regs __iomem *usb_ext;
	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 usb338x_ll_regs __iomem *llregs;
	struct usb338x_ll_lfps_regs __iomem *ll_lfps_regs;
	struct usb338x_ll_tsn_regs __iomem *ll_tsn_regs;
	struct usb338x_ll_chi_regs __iomem *ll_chicken_reg;
	struct usb338x_pl_regs __iomem *plregs;

	struct dma_pool *requests;
	/* statistics...*/
	};

	static inline void set_halt(struct net2280_ep *ep)
	{
	/* ep0 and bulk/intr endpoints */
	writel(BIT(CLEAR_CONTROL_STATUS_PHASE_HANDSHAKE) \|
	/* set NAK_OUT for erratum 0114 */
	((ep->dev->chiprev == CHIPREV_1) << SET_NAK_OUT_PACKETS) \|
	BIT(SET_ENDPOINT_HALT),
	&ep->regs->ep_rsp);
	}

	static inline void clear_halt(struct net2280_ep *ep)
	{
	/* ep0 and bulk/intr endpoints */
	writel(BIT(CLEAR_ENDPOINT_HALT) \|
	BIT(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);
	}

	/*
	* FSM value for Defect 7374 (U1U2 Test) is managed in
	* chip's SCRATCH register:
	*/
	#define DEFECT7374_FSM_FIELD 28

	/* Waiting for Control Read:
	* - A transition to this state indicates a fresh USB connection,
	* before the first Setup Packet. The connection speed is not
	* known. Firmware is waiting for the first Control Read.
	* - Starting state: This state can be thought of as the FSM's typical
	* starting state.
	* - Tip: Upon the first SS Control Read the FSM never
	* returns to this state.
	*/
	#define DEFECT7374_FSM_WAITING_FOR_CONTROL_READ BIT(DEFECT7374_FSM_FIELD)

	/* Non-SS Control Read:
	* - A transition to this state indicates detection of the first HS
	* or FS Control Read.
	* - Tip: Upon the first SS Control Read the FSM never
	* returns to this state.
	*/
	#define DEFECT7374_FSM_NON_SS_CONTROL_READ (2 << DEFECT7374_FSM_FIELD)

	/* SS Control Read:
	* - A transition to this state indicates detection of the
	* first SS Control Read.
	* - This state indicates workaround completion. Workarounds no longer
	* need to be applied (as long as the chip remains powered up).
	* - Tip: Once in this state the FSM state does not change (until
	* the chip's power is lost and restored).
	* - This can be thought of as the final state of the FSM;
	* the FSM 'locks-up' in this state until the chip loses power.
	*/
	#define DEFECT7374_FSM_SS_CONTROL_READ (3 << DEFECT7374_FSM_FIELD)

	#ifdef USE_RDK_LEDS

	static inline void net2280_led_init(struct net2280 *dev)
	{
	/* LED3 (green) is on during USB activity. note erratum 0113. */
	writel(BIT(GPIO3_LED_SELECT) \|
	BIT(GPIO3_OUTPUT_ENABLE) \|
	BIT(GPIO2_OUTPUT_ENABLE) \|
	BIT(GPIO1_OUTPUT_ENABLE) \|
	BIT(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_SUPER: /* green + red */
	val \|= BIT(GPIO0_DATA) \| BIT(GPIO1_DATA);
	break;
	case USB_SPEED_HIGH: /* green */
	val &= ~BIT(GPIO0_DATA);
	val \|= BIT(GPIO1_DATA);
	break;
	case USB_SPEED_FULL: /* red */
	val &= ~BIT(GPIO1_DATA);
	val \|= BIT(GPIO0_DATA);
	break;
	default: /* (off/black) */
	val &= ~(BIT(GPIO1_DATA) \| BIT(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 ep_dbg(ndev, fmt, args...) \
	dev_dbg((&((ndev)->pdev->dev)), fmt, ##args)

	#define ep_vdbg(ndev, fmt, args...) \
	dev_vdbg((&((ndev)->pdev->dev)), fmt, ##args)

	#define ep_info(ndev, fmt, args...) \
	dev_info((&((ndev)->pdev->dev)), fmt, ##args)

	#define ep_warn(ndev, fmt, args...) \
	dev_warn((&((ndev)->pdev->dev)), fmt, ##args)

	#define ep_err(ndev, fmt, args...) \
	dev_err((&((ndev)->pdev->dev)), fmt, ##args)

	/-------------------------------------------------------------------------/

	static inline void set_fifo_bytecount(struct net2280_ep *ep, unsigned count)
	{
	if (ep->dev->pdev->vendor == 0x17cc)
	writeb(count, 2 + (u8 __iomem *) &ep->regs->ep_cfg);
	else{
	u32 tmp = readl(&ep->cfg->ep_cfg) &
	(~(0x07 << EP_FIFO_BYTE_COUNT));
	writel(tmp \| (count << EP_FIFO_BYTE_COUNT), &ep->cfg->ep_cfg);
	}
	}

	static inline void start_out_naking(struct net2280_ep *ep)
	{
	/* NOTE: hardware races lurk here, and PING protocol issues */
	writel(BIT(SET_NAK_OUT_PACKETS), &ep->regs->ep_rsp);
	/* synch with device */
	readl(&ep->regs->ep_rsp);
	}

	static inline void stop_out_naking(struct net2280_ep *ep)
	{
	u32 tmp;

	tmp = readl(&ep->regs->ep_stat);
	if ((tmp & BIT(NAK_OUT_PACKETS)) != 0)
	writel(BIT(CLEAR_NAK_OUT_PACKETS), &ep->regs->ep_rsp);
	}


	static inline void set_max_speed(struct net2280_ep *ep, u32 max)
	{
	u32 reg;
	static const u32 ep_enhanced[9] = { 0x10, 0x60, 0x30, 0x80,
	0x50, 0x20, 0x70, 0x40, 0x90 };

	if (ep->dev->enhanced_mode) {
	reg = ep_enhanced[ep->num];
	switch (ep->dev->gadget.speed) {
	case USB_SPEED_SUPER:
	reg += 2;
	break;
	case USB_SPEED_FULL:
	reg += 1;
	break;
	case USB_SPEED_HIGH:
	default:
	break;
	}
	} else {
	reg = (ep->num + 1) * 0x10;
	if (ep->dev->gadget.speed != USB_SPEED_HIGH)
	reg += 1;
	}

	set_idx_reg(ep->dev->regs, reg, max);
	}

	#endif /* __KERNEL__ */