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e6ab504633
Move the gpib drivers out of staging and into the "real" part of the kernel. This entails: - Remove the gpib Kconfig menu and Makefile build rule from staging. - Remove gpib/uapi from the header file search path in subdir-ccflags of the gpib Makefile - move the gpib/uapi files to include/uapi/linux - Move the gpib tree out of staging to drivers. - Remove the word "Linux" from the gpib Kconfig file. - Add the gpib Kconfig menu and Makefile build rule to drivers Signed-off-by: Dave Penkler <dpenkler@gmail.com> Link: https://patch.msgid.link/20251117144021.23569-5-dpenkler@gmail.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
142 lines
6.5 KiB
C
142 lines
6.5 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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/***************************************************************************
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* copyright : (C) 2002 by Frank Mori Hess
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***************************************************************************/
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#ifndef _NEC7210_H
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#define _NEC7210_H
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#include "gpib_state_machines.h"
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#include <linux/types.h>
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#include <linux/spinlock.h>
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#include <linux/string.h>
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#include <linux/interrupt.h>
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#include "gpib_types.h"
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#include "nec7210_registers.h"
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/* struct used to provide variables local to a nec7210 chip */
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struct nec7210_priv {
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#ifdef CONFIG_HAS_IOPORT
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u32 iobase;
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#endif
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void __iomem *mmiobase;
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unsigned int offset; // offset between successive nec7210 io addresses
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unsigned int dma_channel;
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u8 *dma_buffer;
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unsigned int dma_buffer_length; // length of dma buffer
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dma_addr_t dma_buffer_addr; // bus address of board->buffer for use with dma
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// software copy of bits written to registers
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u8 reg_bits[8];
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u8 auxa_bits; // bits written to auxiliary register A
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u8 auxb_bits; // bits written to auxiliary register B
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// used to keep track of board's state, bit definitions given below
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unsigned long state;
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// lock for chips that extend the nec7210 registers by paging in alternate regs
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spinlock_t register_page_lock;
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// wrappers for outb, inb, readb, or writeb
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u8 (*read_byte)(struct nec7210_priv *priv, unsigned int register_number);
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void (*write_byte)(struct nec7210_priv *priv, u8 byte, unsigned int register_number);
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enum nec7210_chipset type;
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enum talker_function_state talker_state;
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enum listener_function_state listener_state;
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void *private;
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unsigned srq_pending : 1;
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};
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static inline void init_nec7210_private(struct nec7210_priv *priv)
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{
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memset(priv, 0, sizeof(struct nec7210_priv));
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spin_lock_init(&priv->register_page_lock);
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}
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// slightly shorter way to access read_byte and write_byte
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static inline u8 read_byte(struct nec7210_priv *priv, unsigned int register_number)
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{
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return priv->read_byte(priv, register_number);
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}
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static inline void write_byte(struct nec7210_priv *priv, u8 byte, unsigned int register_number)
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{
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priv->write_byte(priv, byte, register_number);
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}
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// struct nec7210_priv.state bit numbers
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enum {
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PIO_IN_PROGRESS_BN, // pio transfer in progress
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DMA_READ_IN_PROGRESS_BN, // dma read transfer in progress
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DMA_WRITE_IN_PROGRESS_BN, // dma write transfer in progress
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READ_READY_BN, // board has data byte available to read
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WRITE_READY_BN, // board is ready to send a data byte
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COMMAND_READY_BN, // board is ready to send a command byte
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RECEIVED_END_BN, // received END
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BUS_ERROR_BN, // output error has occurred
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RFD_HOLDOFF_BN, // rfd holdoff in effect
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DEV_CLEAR_BN, // device clear received
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ADR_CHANGE_BN, // address state change occurred
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};
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// interface functions
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int nec7210_read(struct gpib_board *board, struct nec7210_priv *priv, u8 *buffer,
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size_t length, int *end, size_t *bytes_read);
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int nec7210_write(struct gpib_board *board, struct nec7210_priv *priv, u8 *buffer,
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size_t length, int send_eoi, size_t *bytes_written);
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int nec7210_command(struct gpib_board *board, struct nec7210_priv *priv, u8 *buffer,
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size_t length, size_t *bytes_written);
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int nec7210_take_control(struct gpib_board *board, struct nec7210_priv *priv, int syncronous);
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int nec7210_go_to_standby(struct gpib_board *board, struct nec7210_priv *priv);
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int nec7210_request_system_control(struct gpib_board *board,
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struct nec7210_priv *priv, int request_control);
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void nec7210_interface_clear(struct gpib_board *board, struct nec7210_priv *priv, int assert);
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void nec7210_remote_enable(struct gpib_board *board, struct nec7210_priv *priv, int enable);
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int nec7210_enable_eos(struct gpib_board *board, struct nec7210_priv *priv, u8 eos_bytes,
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int compare_8_bits);
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void nec7210_disable_eos(struct gpib_board *board, struct nec7210_priv *priv);
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unsigned int nec7210_update_status(struct gpib_board *board, struct nec7210_priv *priv,
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unsigned int clear_mask);
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unsigned int nec7210_update_status_nolock(struct gpib_board *board, struct nec7210_priv *priv);
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int nec7210_primary_address(const struct gpib_board *board,
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struct nec7210_priv *priv, unsigned int address);
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int nec7210_secondary_address(const struct gpib_board *board, struct nec7210_priv *priv,
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unsigned int address, int enable);
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int nec7210_parallel_poll(struct gpib_board *board, struct nec7210_priv *priv, u8 *result);
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void nec7210_serial_poll_response(struct gpib_board *board,
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struct nec7210_priv *priv, u8 status);
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void nec7210_parallel_poll_configure(struct gpib_board *board,
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struct nec7210_priv *priv, unsigned int configuration);
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void nec7210_parallel_poll_response(struct gpib_board *board,
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struct nec7210_priv *priv, int ist);
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u8 nec7210_serial_poll_status(struct gpib_board *board, struct nec7210_priv *priv);
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int nec7210_t1_delay(struct gpib_board *board,
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struct nec7210_priv *priv, unsigned int nano_sec);
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void nec7210_return_to_local(const struct gpib_board *board, struct nec7210_priv *priv);
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// utility functions
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void nec7210_board_reset(struct nec7210_priv *priv, const struct gpib_board *board);
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void nec7210_board_online(struct nec7210_priv *priv, const struct gpib_board *board);
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unsigned int nec7210_set_reg_bits(struct nec7210_priv *priv, unsigned int reg,
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unsigned int mask, unsigned int bits);
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void nec7210_set_handshake_mode(struct gpib_board *board, struct nec7210_priv *priv, int mode);
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void nec7210_release_rfd_holdoff(struct gpib_board *board, struct nec7210_priv *priv);
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u8 nec7210_read_data_in(struct gpib_board *board, struct nec7210_priv *priv, int *end);
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// wrappers for io functions
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u8 nec7210_ioport_read_byte(struct nec7210_priv *priv, unsigned int register_num);
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void nec7210_ioport_write_byte(struct nec7210_priv *priv, u8 data, unsigned int register_num);
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u8 nec7210_iomem_read_byte(struct nec7210_priv *priv, unsigned int register_num);
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void nec7210_iomem_write_byte(struct nec7210_priv *priv, u8 data, unsigned int register_num);
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u8 nec7210_locking_ioport_read_byte(struct nec7210_priv *priv, unsigned int register_num);
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void nec7210_locking_ioport_write_byte(struct nec7210_priv *priv, u8 data,
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unsigned int register_num);
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u8 nec7210_locking_iomem_read_byte(struct nec7210_priv *priv, unsigned int register_num);
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void nec7210_locking_iomem_write_byte(struct nec7210_priv *priv, u8 data,
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unsigned int register_num);
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// interrupt service routine
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irqreturn_t nec7210_interrupt(struct gpib_board *board, struct nec7210_priv *priv);
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irqreturn_t nec7210_interrupt_have_status(struct gpib_board *board,
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struct nec7210_priv *priv, int status1, int status2);
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#endif //_NEC7210_H
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