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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>
685 lines
19 KiB
C
685 lines
19 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/***************************************************************************
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* copyright : (C) 2001, 2002 by Frank Mori Hess
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***************************************************************************/
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#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
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#define dev_fmt pr_fmt
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#include <linux/ioport.h>
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#include <linux/sched.h>
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#include <linux/module.h>
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#include <linux/slab.h>
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#include <linux/bitops.h>
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#include <asm/dma.h>
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#include <linux/dma-mapping.h>
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#include <linux/string.h>
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#include <linux/init.h>
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#include "nec7210.h"
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#include "gpibP.h"
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// struct which defines private_data for pc2 driver
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struct pc2_priv {
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struct nec7210_priv nec7210_priv;
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unsigned int irq;
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// io address that clears interrupt for pc2a (0x2f0 + irq)
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unsigned int clear_intr_addr;
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};
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// pc2 uses 8 consecutive io addresses
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static const int pc2_iosize = 8;
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static const int pc2a_iosize = 8;
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static const int pc2_2a_iosize = 16;
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// offset between io addresses of successive nec7210 registers
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static const int pc2a_reg_offset = 0x400;
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static const int pc2_reg_offset = 1;
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// interrupt service routine
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static irqreturn_t pc2_interrupt(int irq, void *arg);
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static irqreturn_t pc2a_interrupt(int irq, void *arg);
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// pc2 specific registers and bits
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// interrupt clear register address
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static const int pc2a_clear_intr_iobase = 0x2f0;
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static inline unsigned int CLEAR_INTR_REG(unsigned int irq)
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{
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return pc2a_clear_intr_iobase + irq;
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}
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MODULE_LICENSE("GPL");
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MODULE_DESCRIPTION("GPIB driver for PC2/PC2a and compatible devices");
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/*
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* GPIB interrupt service routines
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*/
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irqreturn_t pc2_interrupt(int irq, void *arg)
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{
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struct gpib_board *board = arg;
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struct pc2_priv *priv = board->private_data;
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unsigned long flags;
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irqreturn_t retval;
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spin_lock_irqsave(&board->spinlock, flags);
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retval = nec7210_interrupt(board, &priv->nec7210_priv);
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spin_unlock_irqrestore(&board->spinlock, flags);
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return retval;
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}
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irqreturn_t pc2a_interrupt(int irq, void *arg)
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{
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struct gpib_board *board = arg;
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struct pc2_priv *priv = board->private_data;
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int status1, status2;
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unsigned long flags;
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irqreturn_t retval;
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spin_lock_irqsave(&board->spinlock, flags);
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// read interrupt status (also clears status)
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status1 = read_byte(&priv->nec7210_priv, ISR1);
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status2 = read_byte(&priv->nec7210_priv, ISR2);
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/* clear interrupt circuit */
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if (priv->irq)
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outb(0xff, CLEAR_INTR_REG(priv->irq));
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retval = nec7210_interrupt_have_status(board, &priv->nec7210_priv, status1, status2);
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spin_unlock_irqrestore(&board->spinlock, flags);
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return retval;
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}
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// wrappers for interface functions
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static int pc2_read(struct gpib_board *board, u8 *buffer, size_t length, int *end,
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size_t *bytes_read)
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{
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struct pc2_priv *priv = board->private_data;
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return nec7210_read(board, &priv->nec7210_priv, buffer, length, end, bytes_read);
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}
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static int pc2_write(struct gpib_board *board, u8 *buffer, size_t length, int send_eoi,
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size_t *bytes_written)
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{
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struct pc2_priv *priv = board->private_data;
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return nec7210_write(board, &priv->nec7210_priv, buffer, length, send_eoi, bytes_written);
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}
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static int pc2_command(struct gpib_board *board, u8 *buffer,
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size_t length, size_t *bytes_written)
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{
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struct pc2_priv *priv = board->private_data;
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return nec7210_command(board, &priv->nec7210_priv, buffer, length, bytes_written);
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}
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static int pc2_take_control(struct gpib_board *board, int synchronous)
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{
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struct pc2_priv *priv = board->private_data;
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return nec7210_take_control(board, &priv->nec7210_priv, synchronous);
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}
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static int pc2_go_to_standby(struct gpib_board *board)
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{
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struct pc2_priv *priv = board->private_data;
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return nec7210_go_to_standby(board, &priv->nec7210_priv);
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}
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static int pc2_request_system_control(struct gpib_board *board, int request_control)
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{
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struct pc2_priv *priv = board->private_data;
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return nec7210_request_system_control(board, &priv->nec7210_priv, request_control);
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}
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static void pc2_interface_clear(struct gpib_board *board, int assert)
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{
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struct pc2_priv *priv = board->private_data;
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nec7210_interface_clear(board, &priv->nec7210_priv, assert);
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}
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static void pc2_remote_enable(struct gpib_board *board, int enable)
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{
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struct pc2_priv *priv = board->private_data;
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nec7210_remote_enable(board, &priv->nec7210_priv, enable);
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}
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static int pc2_enable_eos(struct gpib_board *board, u8 eos_byte, int compare_8_bits)
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{
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struct pc2_priv *priv = board->private_data;
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return nec7210_enable_eos(board, &priv->nec7210_priv, eos_byte, compare_8_bits);
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}
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static void pc2_disable_eos(struct gpib_board *board)
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{
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struct pc2_priv *priv = board->private_data;
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nec7210_disable_eos(board, &priv->nec7210_priv);
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}
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static unsigned int pc2_update_status(struct gpib_board *board, unsigned int clear_mask)
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{
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struct pc2_priv *priv = board->private_data;
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return nec7210_update_status(board, &priv->nec7210_priv, clear_mask);
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}
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static int pc2_primary_address(struct gpib_board *board, unsigned int address)
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{
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struct pc2_priv *priv = board->private_data;
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return nec7210_primary_address(board, &priv->nec7210_priv, address);
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}
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static int pc2_secondary_address(struct gpib_board *board, unsigned int address, int enable)
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{
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struct pc2_priv *priv = board->private_data;
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return nec7210_secondary_address(board, &priv->nec7210_priv, address, enable);
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}
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static int pc2_parallel_poll(struct gpib_board *board, u8 *result)
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{
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struct pc2_priv *priv = board->private_data;
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return nec7210_parallel_poll(board, &priv->nec7210_priv, result);
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}
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static void pc2_parallel_poll_configure(struct gpib_board *board, u8 config)
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{
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struct pc2_priv *priv = board->private_data;
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nec7210_parallel_poll_configure(board, &priv->nec7210_priv, config);
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}
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static void pc2_parallel_poll_response(struct gpib_board *board, int ist)
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{
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struct pc2_priv *priv = board->private_data;
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nec7210_parallel_poll_response(board, &priv->nec7210_priv, ist);
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}
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static void pc2_serial_poll_response(struct gpib_board *board, u8 status)
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{
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struct pc2_priv *priv = board->private_data;
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nec7210_serial_poll_response(board, &priv->nec7210_priv, status);
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}
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static u8 pc2_serial_poll_status(struct gpib_board *board)
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{
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struct pc2_priv *priv = board->private_data;
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return nec7210_serial_poll_status(board, &priv->nec7210_priv);
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}
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static int pc2_t1_delay(struct gpib_board *board, unsigned int nano_sec)
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{
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struct pc2_priv *priv = board->private_data;
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return nec7210_t1_delay(board, &priv->nec7210_priv, nano_sec);
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}
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static void pc2_return_to_local(struct gpib_board *board)
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{
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struct pc2_priv *priv = board->private_data;
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nec7210_return_to_local(board, &priv->nec7210_priv);
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}
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static int allocate_private(struct gpib_board *board)
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{
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struct pc2_priv *priv;
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board->private_data = kmalloc(sizeof(struct pc2_priv), GFP_KERNEL);
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if (!board->private_data)
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return -1;
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priv = board->private_data;
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memset(priv, 0, sizeof(struct pc2_priv));
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init_nec7210_private(&priv->nec7210_priv);
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return 0;
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}
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static void free_private(struct gpib_board *board)
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{
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kfree(board->private_data);
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board->private_data = NULL;
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}
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static int pc2_generic_attach(struct gpib_board *board, const struct gpib_board_config *config,
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enum nec7210_chipset chipset)
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{
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struct pc2_priv *pc2_priv;
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struct nec7210_priv *nec_priv;
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board->status = 0;
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if (allocate_private(board))
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return -ENOMEM;
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pc2_priv = board->private_data;
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nec_priv = &pc2_priv->nec7210_priv;
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nec_priv->read_byte = nec7210_ioport_read_byte;
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nec_priv->write_byte = nec7210_ioport_write_byte;
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nec_priv->type = chipset;
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#ifndef PC2_DMA
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/*
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* board->dev hasn't been initialized, so forget about DMA until this driver
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* is adapted to use isa_register_driver.
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*/
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if (config->ibdma)
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// driver needs to be adapted to use isa_register_driver to get a struct device*
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dev_err(board->gpib_dev, "DMA disabled for pc2 gpib");
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#else
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if (config->ibdma) {
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nec_priv->dma_buffer_length = 0x1000;
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nec_priv->dma_buffer = dma_alloc_coherent(board->dev,
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nec_priv->dma_buffer_length, &
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nec_priv->dma_buffer_addr, GFP_ATOMIC);
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if (!nec_priv->dma_buffer)
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return -ENOMEM;
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// request isa dma channel
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if (request_dma(config->ibdma, "pc2")) {
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dev_err(board->gpib_dev, "can't request DMA %d\n", config->ibdma);
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return -1;
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}
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nec_priv->dma_channel = config->ibdma;
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}
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#endif
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return 0;
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}
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static int pc2_attach(struct gpib_board *board, const struct gpib_board_config *config)
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{
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int isr_flags = 0;
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struct pc2_priv *pc2_priv;
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struct nec7210_priv *nec_priv;
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int retval;
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retval = pc2_generic_attach(board, config, NEC7210);
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if (retval)
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return retval;
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pc2_priv = board->private_data;
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nec_priv = &pc2_priv->nec7210_priv;
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nec_priv->offset = pc2_reg_offset;
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if (!request_region(config->ibbase, pc2_iosize, "pc2")) {
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dev_err(board->gpib_dev, "ioports are already in use\n");
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return -EBUSY;
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}
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nec_priv->iobase = config->ibbase;
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nec7210_board_reset(nec_priv, board);
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// install interrupt handler
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if (config->ibirq) {
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if (request_irq(config->ibirq, pc2_interrupt, isr_flags, "pc2", board)) {
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dev_err(board->gpib_dev, "can't request IRQ %d\n", config->ibirq);
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return -EBUSY;
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}
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}
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pc2_priv->irq = config->ibirq;
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/* poll so we can detect assertion of ATN */
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if (gpib_request_pseudo_irq(board, pc2_interrupt)) {
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dev_err(board->gpib_dev, "failed to allocate pseudo_irq\n");
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return -1;
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}
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/* set internal counter register for 8 MHz input clock */
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write_byte(nec_priv, ICR | 8, AUXMR);
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nec7210_board_online(nec_priv, board);
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return 0;
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}
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static void pc2_detach(struct gpib_board *board)
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{
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struct pc2_priv *pc2_priv = board->private_data;
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struct nec7210_priv *nec_priv;
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if (pc2_priv) {
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nec_priv = &pc2_priv->nec7210_priv;
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#ifdef PC2_DMA
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if (nec_priv->dma_channel)
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free_dma(nec_priv->dma_channel);
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#endif
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gpib_free_pseudo_irq(board);
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if (pc2_priv->irq)
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free_irq(pc2_priv->irq, board);
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if (nec_priv->iobase) {
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nec7210_board_reset(nec_priv, board);
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release_region(nec_priv->iobase, pc2_iosize);
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}
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if (nec_priv->dma_buffer) {
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dma_free_coherent(board->dev, nec_priv->dma_buffer_length,
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nec_priv->dma_buffer, nec_priv->dma_buffer_addr);
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nec_priv->dma_buffer = NULL;
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}
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}
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free_private(board);
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}
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static int pc2a_common_attach(struct gpib_board *board, const struct gpib_board_config *config,
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unsigned int num_registers, enum nec7210_chipset chipset)
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{
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unsigned int i, j;
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struct pc2_priv *pc2_priv;
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struct nec7210_priv *nec_priv;
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int retval;
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retval = pc2_generic_attach(board, config, chipset);
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if (retval)
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return retval;
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pc2_priv = board->private_data;
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nec_priv = &pc2_priv->nec7210_priv;
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nec_priv->offset = pc2a_reg_offset;
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switch (config->ibbase) {
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case 0x02e1:
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case 0x22e1:
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case 0x42e1:
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case 0x62e1:
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break;
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default:
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dev_err(board->gpib_dev, "PCIIa base range invalid, must be one of 0x[0246]2e1, but is 0x%x\n",
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config->ibbase);
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return -1;
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}
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if (config->ibirq) {
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if (config->ibirq < 2 || config->ibirq > 7) {
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dev_err(board->gpib_dev, "illegal interrupt level %i\n",
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config->ibirq);
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return -1;
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}
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} else {
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dev_err(board->gpib_dev, "interrupt disabled, using polling mode (slow)\n");
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}
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#ifdef CHECK_IOPORTS
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unsigned int err = 0;
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for (i = 0; i < num_registers; i++) {
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if (check_region(config->ibbase + i * pc2a_reg_offset, 1))
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err++;
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}
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if (config->ibirq && check_region(pc2a_clear_intr_iobase + config->ibirq, 1))
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err++;
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if (err) {
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dev_err(board->gpib_dev, "ioports are already in use");
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return -EBUSY;
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}
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#endif
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for (i = 0; i < num_registers; i++) {
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if (!request_region(config->ibbase +
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i * pc2a_reg_offset, 1, "pc2a")) {
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dev_err(board->gpib_dev, "ioports are already in use");
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for (j = 0; j < i; j++)
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release_region(config->ibbase +
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j * pc2a_reg_offset, 1);
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return -EBUSY;
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}
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}
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nec_priv->iobase = config->ibbase;
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if (config->ibirq) {
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if (!request_region(pc2a_clear_intr_iobase + config->ibirq, 1, "pc2a")) {
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dev_err(board->gpib_dev, "ioports are already in use");
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return -1;
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}
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pc2_priv->clear_intr_addr = pc2a_clear_intr_iobase + config->ibirq;
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if (request_irq(config->ibirq, pc2a_interrupt, 0, "pc2a", board)) {
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dev_err(board->gpib_dev, "can't request IRQ %d\n", config->ibirq);
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return -EBUSY;
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}
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}
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pc2_priv->irq = config->ibirq;
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/* poll so we can detect assertion of ATN */
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if (gpib_request_pseudo_irq(board, pc2_interrupt)) {
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dev_err(board->gpib_dev, "failed to allocate pseudo_irq\n");
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return -1;
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}
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// make sure interrupt is clear
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if (pc2_priv->irq)
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outb(0xff, CLEAR_INTR_REG(pc2_priv->irq));
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nec7210_board_reset(nec_priv, board);
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/* set internal counter register for 8 MHz input clock */
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write_byte(nec_priv, ICR | 8, AUXMR);
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nec7210_board_online(nec_priv, board);
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return 0;
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}
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static int pc2a_attach(struct gpib_board *board, const struct gpib_board_config *config)
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{
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return pc2a_common_attach(board, config, pc2a_iosize, NEC7210);
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}
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static int pc2a_cb7210_attach(struct gpib_board *board, const struct gpib_board_config *config)
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{
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return pc2a_common_attach(board, config, pc2a_iosize, CB7210);
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}
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static int pc2_2a_attach(struct gpib_board *board, const struct gpib_board_config *config)
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{
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return pc2a_common_attach(board, config, pc2_2a_iosize, NAT4882);
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}
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static void pc2a_common_detach(struct gpib_board *board, unsigned int num_registers)
|
|
{
|
|
int i;
|
|
struct pc2_priv *pc2_priv = board->private_data;
|
|
struct nec7210_priv *nec_priv;
|
|
|
|
if (pc2_priv) {
|
|
nec_priv = &pc2_priv->nec7210_priv;
|
|
#ifdef PC2_DMA
|
|
if (nec_priv->dma_channel)
|
|
free_dma(nec_priv->dma_channel);
|
|
#endif
|
|
gpib_free_pseudo_irq(board);
|
|
if (pc2_priv->irq)
|
|
free_irq(pc2_priv->irq, board);
|
|
if (nec_priv->iobase) {
|
|
nec7210_board_reset(nec_priv, board);
|
|
for (i = 0; i < num_registers; i++)
|
|
release_region(nec_priv->iobase +
|
|
i * pc2a_reg_offset, 1);
|
|
}
|
|
if (pc2_priv->clear_intr_addr)
|
|
release_region(pc2_priv->clear_intr_addr, 1);
|
|
if (nec_priv->dma_buffer) {
|
|
dma_free_coherent(board->dev, nec_priv->dma_buffer_length,
|
|
nec_priv->dma_buffer,
|
|
nec_priv->dma_buffer_addr);
|
|
nec_priv->dma_buffer = NULL;
|
|
}
|
|
}
|
|
free_private(board);
|
|
}
|
|
|
|
static void pc2a_detach(struct gpib_board *board)
|
|
{
|
|
pc2a_common_detach(board, pc2a_iosize);
|
|
}
|
|
|
|
static void pc2_2a_detach(struct gpib_board *board)
|
|
{
|
|
pc2a_common_detach(board, pc2_2a_iosize);
|
|
}
|
|
|
|
static struct gpib_interface pc2_interface = {
|
|
.name = "pcII",
|
|
.attach = pc2_attach,
|
|
.detach = pc2_detach,
|
|
.read = pc2_read,
|
|
.write = pc2_write,
|
|
.command = pc2_command,
|
|
.take_control = pc2_take_control,
|
|
.go_to_standby = pc2_go_to_standby,
|
|
.request_system_control = pc2_request_system_control,
|
|
.interface_clear = pc2_interface_clear,
|
|
.remote_enable = pc2_remote_enable,
|
|
.enable_eos = pc2_enable_eos,
|
|
.disable_eos = pc2_disable_eos,
|
|
.parallel_poll = pc2_parallel_poll,
|
|
.parallel_poll_configure = pc2_parallel_poll_configure,
|
|
.parallel_poll_response = pc2_parallel_poll_response,
|
|
.local_parallel_poll_mode = NULL, // XXX
|
|
.line_status = NULL,
|
|
.update_status = pc2_update_status,
|
|
.primary_address = pc2_primary_address,
|
|
.secondary_address = pc2_secondary_address,
|
|
.serial_poll_response = pc2_serial_poll_response,
|
|
.serial_poll_status = pc2_serial_poll_status,
|
|
.t1_delay = pc2_t1_delay,
|
|
.return_to_local = pc2_return_to_local,
|
|
};
|
|
|
|
static struct gpib_interface pc2a_interface = {
|
|
.name = "pcIIa",
|
|
.attach = pc2a_attach,
|
|
.detach = pc2a_detach,
|
|
.read = pc2_read,
|
|
.write = pc2_write,
|
|
.command = pc2_command,
|
|
.take_control = pc2_take_control,
|
|
.go_to_standby = pc2_go_to_standby,
|
|
.request_system_control = pc2_request_system_control,
|
|
.interface_clear = pc2_interface_clear,
|
|
.remote_enable = pc2_remote_enable,
|
|
.enable_eos = pc2_enable_eos,
|
|
.disable_eos = pc2_disable_eos,
|
|
.parallel_poll = pc2_parallel_poll,
|
|
.parallel_poll_configure = pc2_parallel_poll_configure,
|
|
.parallel_poll_response = pc2_parallel_poll_response,
|
|
.local_parallel_poll_mode = NULL, // XXX
|
|
.line_status = NULL,
|
|
.update_status = pc2_update_status,
|
|
.primary_address = pc2_primary_address,
|
|
.secondary_address = pc2_secondary_address,
|
|
.serial_poll_response = pc2_serial_poll_response,
|
|
.serial_poll_status = pc2_serial_poll_status,
|
|
.t1_delay = pc2_t1_delay,
|
|
.return_to_local = pc2_return_to_local,
|
|
};
|
|
|
|
static struct gpib_interface pc2a_cb7210_interface = {
|
|
.name = "pcIIa_cb7210",
|
|
.attach = pc2a_cb7210_attach,
|
|
.detach = pc2a_detach,
|
|
.read = pc2_read,
|
|
.write = pc2_write,
|
|
.command = pc2_command,
|
|
.take_control = pc2_take_control,
|
|
.go_to_standby = pc2_go_to_standby,
|
|
.request_system_control = pc2_request_system_control,
|
|
.interface_clear = pc2_interface_clear,
|
|
.remote_enable = pc2_remote_enable,
|
|
.enable_eos = pc2_enable_eos,
|
|
.disable_eos = pc2_disable_eos,
|
|
.parallel_poll = pc2_parallel_poll,
|
|
.parallel_poll_configure = pc2_parallel_poll_configure,
|
|
.parallel_poll_response = pc2_parallel_poll_response,
|
|
.local_parallel_poll_mode = NULL, // XXX
|
|
.line_status = NULL, // XXX
|
|
.update_status = pc2_update_status,
|
|
.primary_address = pc2_primary_address,
|
|
.secondary_address = pc2_secondary_address,
|
|
.serial_poll_response = pc2_serial_poll_response,
|
|
.serial_poll_status = pc2_serial_poll_status,
|
|
.t1_delay = pc2_t1_delay,
|
|
.return_to_local = pc2_return_to_local,
|
|
};
|
|
|
|
static struct gpib_interface pc2_2a_interface = {
|
|
.name = "pcII_IIa",
|
|
.attach = pc2_2a_attach,
|
|
.detach = pc2_2a_detach,
|
|
.read = pc2_read,
|
|
.write = pc2_write,
|
|
.command = pc2_command,
|
|
.take_control = pc2_take_control,
|
|
.go_to_standby = pc2_go_to_standby,
|
|
.request_system_control = pc2_request_system_control,
|
|
.interface_clear = pc2_interface_clear,
|
|
.remote_enable = pc2_remote_enable,
|
|
.enable_eos = pc2_enable_eos,
|
|
.disable_eos = pc2_disable_eos,
|
|
.parallel_poll = pc2_parallel_poll,
|
|
.parallel_poll_configure = pc2_parallel_poll_configure,
|
|
.parallel_poll_response = pc2_parallel_poll_response,
|
|
.local_parallel_poll_mode = NULL, // XXX
|
|
.line_status = NULL,
|
|
.update_status = pc2_update_status,
|
|
.primary_address = pc2_primary_address,
|
|
.secondary_address = pc2_secondary_address,
|
|
.serial_poll_response = pc2_serial_poll_response,
|
|
.serial_poll_status = pc2_serial_poll_status,
|
|
.t1_delay = pc2_t1_delay,
|
|
.return_to_local = pc2_return_to_local,
|
|
};
|
|
|
|
static int __init pc2_init_module(void)
|
|
{
|
|
int ret;
|
|
|
|
ret = gpib_register_driver(&pc2_interface, THIS_MODULE);
|
|
if (ret) {
|
|
pr_err("gpib_register_driver failed: error = %d\n", ret);
|
|
return ret;
|
|
}
|
|
|
|
ret = gpib_register_driver(&pc2a_interface, THIS_MODULE);
|
|
if (ret) {
|
|
pr_err("gpib_register_driver failed: error = %d\n", ret);
|
|
goto err_pc2a;
|
|
}
|
|
|
|
ret = gpib_register_driver(&pc2a_cb7210_interface, THIS_MODULE);
|
|
if (ret) {
|
|
pr_err("gpib_register_driver failed: error = %d\n", ret);
|
|
goto err_cb7210;
|
|
}
|
|
|
|
ret = gpib_register_driver(&pc2_2a_interface, THIS_MODULE);
|
|
if (ret) {
|
|
pr_err("gpib_register_driver failed: error = %d\n", ret);
|
|
goto err_pc2_2a;
|
|
}
|
|
|
|
return 0;
|
|
|
|
err_pc2_2a:
|
|
gpib_unregister_driver(&pc2a_cb7210_interface);
|
|
err_cb7210:
|
|
gpib_unregister_driver(&pc2a_interface);
|
|
err_pc2a:
|
|
gpib_unregister_driver(&pc2_interface);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static void __exit pc2_exit_module(void)
|
|
{
|
|
gpib_unregister_driver(&pc2_interface);
|
|
gpib_unregister_driver(&pc2a_interface);
|
|
gpib_unregister_driver(&pc2a_cb7210_interface);
|
|
gpib_unregister_driver(&pc2_2a_interface);
|
|
}
|
|
|
|
module_init(pc2_init_module);
|
|
module_exit(pc2_exit_module);
|
|
|