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/* SPDX-License-Identifier: GPL-2.0 */
/***************************************************************************
* copyright : (C) 2002 by Frank Mori Hess *
***************************************************************************/
#ifndef _HP82335_H
#define _HP82335_H
#include "tms9914.h"
#include "gpibP.h"
// struct which defines private_data for board
struct hp82335_priv {
struct tms9914_priv tms9914_priv;
unsigned int irq;
unsigned long raw_iobase;
};
// interfaces
extern gpib_interface_t hp82335_interface;
// interface functions
int hp82335_read(gpib_board_t *board, uint8_t *buffer, size_t length, int *end, size_t *bytes_read);
int hp82335_write(gpib_board_t *board, uint8_t *buffer, size_t length,
int send_eoi, size_t *bytes_written);
int hp82335_command(gpib_board_t *board, uint8_t *buffer, size_t length, size_t *bytes_written);
int hp82335_take_control(gpib_board_t *board, int synchronous);
int hp82335_go_to_standby(gpib_board_t *board);
void hp82335_request_system_control(gpib_board_t *board, int request_control);
void hp82335_interface_clear(gpib_board_t *board, int assert);
void hp82335_remote_enable(gpib_board_t *board, int enable);
int hp82335_enable_eos(gpib_board_t *board, uint8_t eos_byte, int
compare_8_bits);
void hp82335_disable_eos(gpib_board_t *board);
unsigned int hp82335_update_status(gpib_board_t *board, unsigned int clear_mask);
int hp82335_primary_address(gpib_board_t *board, unsigned int address);
int hp82335_secondary_address(gpib_board_t *board, unsigned int address, int
enable);
int hp82335_parallel_poll(gpib_board_t *board, uint8_t *result);
void hp82335_parallel_poll_configure(gpib_board_t *board, uint8_t config);
void hp82335_parallel_poll_response(gpib_board_t *board, int ist);
void hp82335_serial_poll_response(gpib_board_t *board, uint8_t status);
void hp82335_return_to_local(gpib_board_t *board);
// interrupt service routines
irqreturn_t hp82335_interrupt(int irq, void *arg);
// utility functions
int hp82335_allocate_private(gpib_board_t *board);
void hp82335_free_private(gpib_board_t *board);
// size of io memory region used
static const int hp82335_rom_size = 0x2000;
static const int hp82335_upper_iomem_size = 0x2000;
// hp82335 register offsets
enum hp_read_regs {
HPREG_CSR = 0x17f8,
HPREG_STATUS = 0x1ffc,
};
enum hp_write_regs {
HPREG_INTR_CLEAR = 0x17f7,
HPREG_CCR = HPREG_CSR,
};
enum ccr_bits {
DMA_ENABLE = (1 << 0), /* DMA enable */
DMA_CHAN_SELECT = (1 << 1), /* DMA channel select O=3,1=2 */
INTR_ENABLE = (1 << 2), /* interrupt enable */
SYS_DISABLE = (1 << 3), /* system controller disable */
};
enum csr_bits {
SWITCH6 = (1 << 0), /* switch 6 position */
SWITCH5 = (1 << 1), /* switch 5 position */
SYS_CONTROLLER = (1 << 2), /* system controller bit */
DMA_ENABLE_STATUS = (1 << 4), /* DMA enabled */
DMA_CHAN_STATUS = (1 << 5), /* DMA channel 0=3,1=2 */
INTR_ENABLE_STATUS = (1 << 6), /* Interrupt enable */
INTR_PENDING = (1 << 7), /* Interrupt Pending */
};
#endif // _HP82335_H
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