mite.h

/* SPDX-License-Identifier: GPL-2.0-only */

/*
 *   Hardware driver for NI Mite PCI interface chip
 *
 *   Copyright (C) 1999 David A. Schleef <[email protected]>
 */

#ifndef _MITE_H_
#define _MITE_H_

#include <linux/pci.h>

#define PCI_VENDOR_ID_NATINST		0x1093

//#define DEBUG_MITE

#ifdef DEBUG_MITE
#define MDPRINTK(format, args...) pr_debug(format, ## args)
#else
#define MDPRINTK(args...)
#endif

#define MITE_RING_SIZE 3000
struct mite_dma_chain {
	u32 count;
	u32 addr;
	u32 next;
};

struct mite_struct {
	struct mite_struct *next;
	int used;

	struct pci_dev *pcidev;
	unsigned long mite_phys_addr;
	void __iomem *mite_io_addr;
	unsigned long daq_phys_addr;
	void __iomem *daq_io_addr;

	int DMA_CheckNearEnd;

	struct mite_dma_chain ring[MITE_RING_SIZE];
};

extern struct mite_struct *mite_devices;

extern inline unsigned int mite_irq(struct mite_struct *mite)
{
	return mite->pcidev->irq;
};

extern inline unsigned int mite_device_id(struct mite_struct *mite)
{
	return mite->pcidev->device;
};

void mite_init(void);
void mite_cleanup(void);
int mite_setup(struct mite_struct *mite);
void mite_unsetup(struct mite_struct *mite);
void mite_list_devices(void);

#define CHAN_OFFSET(x)			(0x100 * (x))

/* DMA base for chan 0 is 0x500, chan 1 is 0x600 */

#define MITE_CHOR		0x500
#define CHOR_DMARESET			BIT(31)
#define CHOR_SET_SEND_TC		BIT(11)
#define CHOR_CLR_SEND_TC		BIT(10)
#define CHOR_SET_LPAUSE			BIT(9)
#define CHOR_CLR_LPAUSE			BIT(8)
#define CHOR_CLRDONE			BIT(7)
#define CHOR_CLRRB			BIT(6)
#define CHOR_CLRLC			BIT(5)
#define CHOR_FRESET			BIT(4)
#define CHOR_ABORT			BIT(3)
#define CHOR_STOP			BIT(2)
#define CHOR_CONT			BIT(1)
#define CHOR_START			BIT(0)
#define CHOR_PON			(CHOR_CLR_SEND_TC | CHOR_CLR_LPAUSE)

#define MITE_CHCR		0x504
#define CHCR_SET_DMA_IE			BIT(31)
#define CHCR_CLR_DMA_IE			BIT(30)
#define CHCR_SET_LINKP_IE		BIT(29)
#define CHCR_CLR_LINKP_IE		BIT(28)
#define CHCR_SET_SAR_IE			BIT(27)
#define CHCR_CLR_SAR_IE			BIT(26)
#define CHCR_SET_DONE_IE		BIT(25)
#define CHCR_CLR_DONE_IE		BIT(24)
#define CHCR_SET_MRDY_IE		BIT(23)
#define CHCR_CLR_MRDY_IE		BIT(22)
#define CHCR_SET_DRDY_IE		BIT(21)
#define CHCR_CLR_DRDY_IE		BIT(20)
#define CHCR_SET_LC_IE			BIT(19)
#define CHCR_CLR_LC_IE			BIT(18)
#define CHCR_SET_CONT_RB_IE		BIT(17)
#define CHCR_CLR_CONT_RB_IE		BIT(16)
#define CHCR_FIFODIS			BIT(15)
#define CHCR_FIFO_ON			0
#define CHCR_BURSTEN			BIT(14)
#define CHCR_NO_BURSTEN			0
#define CHCR_NFTP(x)			((x) << 11)
#define CHCR_NFTP0			CHCR_NFTP(0)
#define CHCR_NFTP1			CHCR_NFTP(1)
#define CHCR_NFTP2			CHCR_NFTP(2)
#define CHCR_NFTP4			CHCR_NFTP(3)
#define CHCR_NFTP8			CHCR_NFTP(4)
#define CHCR_NFTP16			CHCR_NFTP(5)
#define CHCR_NETP(x)			((x) << 11)
#define CHCR_NETP0			CHCR_NETP(0)
#define CHCR_NETP1			CHCR_NETP(1)
#define CHCR_NETP2			CHCR_NETP(2)
#define CHCR_NETP4			CHCR_NETP(3)
#define CHCR_NETP8			CHCR_NETP(4)
#define CHCR_CHEND1			BIT(5)
#define CHCR_CHEND0			BIT(4)
#define CHCR_DIR			BIT(3)
#define CHCR_DEV_TO_MEM			CHCR_DIR
#define CHCR_MEM_TO_DEV			0
#define CHCR_NORMAL			((0) << 0)
#define CHCR_CONTINUE			((1) << 0)
#define CHCR_RINGBUFF			((2) << 0)
#define CHCR_LINKSHORT			((4) << 0)
#define CHCR_LINKLONG			((5) << 0)
#define CHCRPON				(CHCR_CLR_DMA_IE | CHCR_CLR_LINKP_IE | CHCR_CLR_SAR_IE | \
					 CHCR_CLR_DONE_IE | CHCR_CLR_MRDY_IE | CHCR_CLR_DRDY_IE | \
					 CHCR_CLR_LC_IE | CHCR_CLR_CONT_IE)

#define MITE_TCR		0x508

/* CR bits */
#define CR_RL(x)			((x) << 21)
#define CR_RL0				CR_RL(0)
#define CR_RL1				CR_RL(1)
#define CR_RL2				CR_RL(2)
#define CR_RL4				CR_RL(3)
#define CR_RL8				CR_RL(4)
#define CR_RL16				CR_RL(5)
#define CR_RL32				CR_RL(6)
#define CR_RL64				CR_RL(7)
#define CR_RD(x)			((x) << 19)
#define CR_RD0				CR_RD(0)
#define CR_RD32				CR_RD(1)
#define CR_RD512			CR_RD(2)
#define CR_RD8192			CR_RD(3)
#define CR_REQS(x)			((x) << 16)
#define CR_REQSDRQ0			CR_REQS(4)
#define CR_REQSDRQ1			CR_REQS(5)
#define CR_REQSDRQ2			CR_REQS(6)
#define CR_REQSDRQ3			CR_REQS(7)
#define CR_ASEQX(x)			((x) << 10)
#define CR_ASEQX0			CR_ASEQX(0)
#define	CR_ASEQDONT			CR_ASEQX0
#define CR_ASEQXP1			CR_ASEQX(1)
#define CR_ASEQUP			CR_ASEQXP1
#define CR_ASEQXP2			CR_ASEQX(2)
#define CR_ASEQDOWN			CR_ASEQXP2
#define CR_ASEQXP4			CR_ASEQX(3)
#define CR_ASEQXP8			CR_ASEQX(4)
#define CR_ASEQXP16			CR_ASEQX(5)
#define CR_ASEQXP32			CR_ASEQX(6)
#define CR_ASEQXP64			CR_ASEQX(7)
#define CR_ASEQXM1			CR_ASEQX(9)
#define CR_ASEQXM2			CR_ASEQX(10)
#define CR_ASEQXM4			CR_ASEQX(11)
#define CR_ASEQXM8			CR_ASEQX(12)
#define CR_ASEQXM16			CR_ASEQX(13)
#define CR_ASEQXM32			CR_ASEQX(14)
#define CR_ASEQXM64			CR_ASEQX(15)
#define CR_PSIZEBYTE			BIT(8)
#define CR_PSIZEHALF			(2 << 8)
#define CR_PSIZEWORD			(3 << 8)
#define CR_PORTCPU			(0 << 6)
#define CR_PORTIO			BIT(6)
#define CR_PORTVXI			(2 << 6)
#define CR_PORTMXI			(3 << 6)
#define CR_AMDEVICE			BIT(0)

#define CHSR_INT			0x80000000
#define CHSR_DONE			0x02000000
#define CHSR_LINKC			0x00080000

#define MITE_MCR		0x50c
#define	MCRPON				0

#define MITE_MAR		0x510

#define MITE_DCR		0x514
#define DCR_NORMAL			BIT(29)
#define DCRPON				0

#define MITE_DAR		0x518

#define MITE_LKCR		0x51c

#define MITE_LKAR		0x520
#define MITE_LLKAR		0x524
#define MITE_BAR		0x528
#define MITE_BCR		0x52c
#define MITE_SAR		0x530
#define MITE_WSCR		0x534
#define MITE_WSER		0x538
#define MITE_CHSR		0x53c
#define MITE_FCR		0x540

#define MITE_FIFO		0x80
#define MITE_FIFOEND		0xff

#define MITE_AMRAM		        0x00
#define MITE_AMDEVICE		        0x01
#define MITE_AMHOST_A32_SINGLE	        0x09
#define MITE_AMHOST_A24_SINGLE	        0x39
#define MITE_AMHOST_A16_SINGLE	        0x29
#define MITE_AMHOST_A32_BLOCK	        0x0b
#define MITE_AMHOST_A32D64_BLOCK	0x08
#define MITE_AMHOST_A24_BLOCK	        0x3b

enum mite_registers {
	MITE_IODWBSR = 0xc0,	// IO Device Window Base Size Register
	MITE_CSIGR = 0x460,	// chip signature
	MITE_IODWBSR_1 = 0xc4,	// IO Device Window Base Size Register 1 (used by 6602 boards)
	MITE_IODWCR_1 = 0xf4
};

enum MITE_IODWBSR_bits {
	WENAB = 0x80,		// window enable
	WENAB_6602 = 0x8c	// window enable for 6602 boards
};

#endif