xref: /kernel/linux/linux-6.6/drivers/comedi/drivers/amcc_s5933.h

/* SPDX-License-Identifier: GPL-2.0 */
/*
 * Stuff for AMCC S5933 PCI Controller
 *
 * Author: Michal Dobes <dobes@tesnet.cz>
 *
 * Inspirated from general-purpose AMCC S5933 PCI Matchmaker driver
 * made by Andrea Cisternino  <acister@pcape1.pi.infn.it>
 * and as result of espionage from MITE code made by David A. Schleef.
 * Thanks to AMCC for their on-line documentation and bus master DMA
 * example.
 */

#ifndef _AMCC_S5933_H_
#define _AMCC_S5933_H_

/****************************************************************************/
/* AMCC Operation Register Offsets - PCI                                    */
/****************************************************************************/

#define AMCC_OP_REG_OMB1         0x00
#define AMCC_OP_REG_OMB2         0x04
#define AMCC_OP_REG_OMB3         0x08
#define AMCC_OP_REG_OMB4         0x0c
#define AMCC_OP_REG_IMB1         0x10
#define AMCC_OP_REG_IMB2         0x14
#define AMCC_OP_REG_IMB3         0x18
#define AMCC_OP_REG_IMB4         0x1c
#define AMCC_OP_REG_FIFO         0x20
#define AMCC_OP_REG_MWAR         0x24
#define AMCC_OP_REG_MWTC         0x28
#define AMCC_OP_REG_MRAR         0x2c
#define AMCC_OP_REG_MRTC         0x30
#define AMCC_OP_REG_MBEF         0x34
#define AMCC_OP_REG_INTCSR       0x38
#define  AMCC_OP_REG_INTCSR_SRC  (AMCC_OP_REG_INTCSR + 2)	/* INT source */
#define  AMCC_OP_REG_INTCSR_FEC  (AMCC_OP_REG_INTCSR + 3)	/* FIFO ctrl */
#define AMCC_OP_REG_MCSR         0x3c
#define  AMCC_OP_REG_MCSR_NVDATA (AMCC_OP_REG_MCSR + 2)	/* Data in byte 2 */
#define  AMCC_OP_REG_MCSR_NVCMD  (AMCC_OP_REG_MCSR + 3)	/* Command in byte 3 */

#define AMCC_FIFO_DEPTH_DWORD	8
#define AMCC_FIFO_DEPTH_BYTES	(8 * sizeof(u32))

/****************************************************************************/
/* AMCC - PCI Interrupt Control/Status Register                            */
/****************************************************************************/
#define INTCSR_OUTBOX_BYTE(x)	((x) & 0x3)
#define INTCSR_OUTBOX_SELECT(x)	(((x) & 0x3) << 2)
#define INTCSR_OUTBOX_EMPTY_INT	0x10	/*  enable outbox empty interrupt */
#define INTCSR_INBOX_BYTE(x)	(((x) & 0x3) << 8)
#define INTCSR_INBOX_SELECT(x)	(((x) & 0x3) << 10)
#define INTCSR_INBOX_FULL_INT	0x1000	/*  enable inbox full interrupt */
/* read, or write clear inbox full interrupt */
#define INTCSR_INBOX_INTR_STATUS	0x20000
/* read only, interrupt asserted */
#define INTCSR_INTR_ASSERTED	0x800000

/****************************************************************************/
/* AMCC - PCI non-volatile ram command register (byte 3 of AMCC_OP_REG_MCSR) */
/****************************************************************************/
#define MCSR_NV_LOAD_LOW_ADDR	0x0
#define MCSR_NV_LOAD_HIGH_ADDR	0x20
#define MCSR_NV_WRITE	0x40
#define MCSR_NV_READ	0x60
#define MCSR_NV_MASK	0x60
#define MCSR_NV_ENABLE	0x80
#define MCSR_NV_BUSY	MCSR_NV_ENABLE

/****************************************************************************/
/* AMCC Operation Registers Size - PCI                                      */
/****************************************************************************/

#define AMCC_OP_REG_SIZE	 64	/* in bytes */

/****************************************************************************/
/* AMCC Operation Register Offsets - Add-on                                 */
/****************************************************************************/

#define AMCC_OP_REG_AIMB1         0x00
#define AMCC_OP_REG_AIMB2         0x04
#define AMCC_OP_REG_AIMB3         0x08
#define AMCC_OP_REG_AIMB4         0x0c
#define AMCC_OP_REG_AOMB1         0x10
#define AMCC_OP_REG_AOMB2         0x14
#define AMCC_OP_REG_AOMB3         0x18
#define AMCC_OP_REG_AOMB4         0x1c
#define AMCC_OP_REG_AFIFO         0x20
#define AMCC_OP_REG_AMWAR         0x24
#define AMCC_OP_REG_APTA          0x28
#define AMCC_OP_REG_APTD          0x2c
#define AMCC_OP_REG_AMRAR         0x30
#define AMCC_OP_REG_AMBEF         0x34
#define AMCC_OP_REG_AINT          0x38
#define AMCC_OP_REG_AGCSTS        0x3c
#define AMCC_OP_REG_AMWTC         0x58
#define AMCC_OP_REG_AMRTC         0x5c

/****************************************************************************/
/* AMCC - Add-on General Control/Status Register                            */
/****************************************************************************/

#define AGCSTS_CONTROL_MASK	0xfffff000
#define  AGCSTS_NV_ACC_MASK	0xe0000000
#define  AGCSTS_RESET_MASK	0x0e000000
#define  AGCSTS_NV_DA_MASK	0x00ff0000
#define  AGCSTS_BIST_MASK	0x0000f000
#define AGCSTS_STATUS_MASK	0x000000ff
#define  AGCSTS_TCZERO_MASK	0x000000c0
#define  AGCSTS_FIFO_ST_MASK	0x0000003f

#define AGCSTS_TC_ENABLE	0x10000000

#define AGCSTS_RESET_MBFLAGS	0x08000000
#define AGCSTS_RESET_P2A_FIFO	0x04000000
#define AGCSTS_RESET_A2P_FIFO	0x02000000
#define AGCSTS_RESET_FIFOS	(AGCSTS_RESET_A2P_FIFO | AGCSTS_RESET_P2A_FIFO)

#define AGCSTS_A2P_TCOUNT	0x00000080
#define AGCSTS_P2A_TCOUNT	0x00000040

#define AGCSTS_FS_P2A_EMPTY	0x00000020
#define AGCSTS_FS_P2A_HALF	0x00000010
#define AGCSTS_FS_P2A_FULL	0x00000008

#define AGCSTS_FS_A2P_EMPTY	0x00000004
#define AGCSTS_FS_A2P_HALF	0x00000002
#define AGCSTS_FS_A2P_FULL	0x00000001

/****************************************************************************/
/* AMCC - Add-on Interrupt Control/Status Register                            */
/****************************************************************************/

#define AINT_INT_MASK		0x00ff0000
#define AINT_SEL_MASK		0x0000ffff
#define  AINT_IS_ENSEL_MASK	0x00001f1f

#define AINT_INT_ASSERTED	0x00800000
#define AINT_BM_ERROR		0x00200000
#define AINT_BIST_INT		0x00100000

#define AINT_RT_COMPLETE	0x00080000
#define AINT_WT_COMPLETE	0x00040000

#define AINT_OUT_MB_INT		0x00020000
#define AINT_IN_MB_INT		0x00010000

#define AINT_READ_COMPL		0x00008000
#define AINT_WRITE_COMPL	0x00004000

#define AINT_OMB_ENABLE		0x00001000
#define AINT_OMB_SELECT		0x00000c00
#define AINT_OMB_BYTE		0x00000300

#define AINT_IMB_ENABLE		0x00000010
#define AINT_IMB_SELECT		0x0000000c
#define AINT_IMB_BYTE		0x00000003

/* these are bits from various different registers, needs cleanup XXX */
/* Enable Bus Mastering */
#define EN_A2P_TRANSFERS	0x00000400
/* FIFO Flag Reset */
#define RESET_A2P_FLAGS		0x04000000L
/* FIFO Relative Priority */
#define A2P_HI_PRIORITY		0x00000100L
/* Identify Interrupt Sources */
#define ANY_S593X_INT		0x00800000L
#define READ_TC_INT		0x00080000L
#define WRITE_TC_INT		0x00040000L
#define IN_MB_INT		0x00020000L
#define MASTER_ABORT_INT	0x00100000L
#define TARGET_ABORT_INT	0x00200000L
#define BUS_MASTER_INT		0x00200000L

#endif