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Diffstat (limited to 'drivers/staging/vme/devices/vme_pio2_core.c')
-rw-r--r--drivers/staging/vme/devices/vme_pio2_core.c493
1 files changed, 0 insertions, 493 deletions
diff --git a/drivers/staging/vme/devices/vme_pio2_core.c b/drivers/staging/vme/devices/vme_pio2_core.c
deleted file mode 100644
index 367535b4b77f..000000000000
--- a/drivers/staging/vme/devices/vme_pio2_core.c
+++ /dev/null
@@ -1,493 +0,0 @@
-/*
- * GE PIO2 6U VME I/O Driver
- *
- * Author: Martyn Welch <martyn.welch@ge.com>
- * Copyright 2009 GE Intelligent Platforms Embedded Systems, Inc.
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License as published by the
- * Free Software Foundation; either version 2 of the License, or (at your
- * option) any later version.
- */
-
-#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
-
-#include <linux/module.h>
-#include <linux/types.h>
-#include <linux/kernel.h>
-#include <linux/errno.h>
-#include <linux/device.h>
-#include <linux/ctype.h>
-#include <linux/gpio.h>
-#include <linux/slab.h>
-#include <linux/vme.h>
-
-#include "vme_pio2.h"
-
-static const char driver_name[] = "pio2";
-
-static int bus[PIO2_CARDS_MAX];
-static int bus_num;
-static long base[PIO2_CARDS_MAX];
-static int base_num;
-static int vector[PIO2_CARDS_MAX];
-static int vector_num;
-static int level[PIO2_CARDS_MAX];
-static int level_num;
-static char *variant[PIO2_CARDS_MAX];
-static int variant_num;
-
-static bool loopback;
-
-static int pio2_match(struct vme_dev *);
-static int pio2_probe(struct vme_dev *);
-static int pio2_remove(struct vme_dev *);
-
-static int pio2_get_led(struct pio2_card *card)
-{
- /* Can't read hardware, state saved in structure */
- return card->led;
-}
-
-static int pio2_set_led(struct pio2_card *card, int state)
-{
- u8 reg;
- int retval;
-
- reg = card->irq_level;
-
- /* Register state inverse of led state */
- if (!state)
- reg |= PIO2_LED;
-
- if (loopback)
- reg |= PIO2_LOOP;
-
- retval = vme_master_write(card->window, &reg, 1, PIO2_REGS_CTRL);
- if (retval < 0)
- return retval;
-
- card->led = state ? 1 : 0;
-
- return 0;
-}
-
-static void pio2_int(int level, int vector, void *ptr)
-{
- int vec, i, channel, retval;
- u8 reg;
- struct pio2_card *card = ptr;
-
- vec = vector & ~PIO2_VME_VECTOR_MASK;
-
- switch (vec) {
- case 0:
- dev_warn(&card->vdev->dev, "Spurious Interrupt\n");
- break;
- case 1:
- case 2:
- case 3:
- case 4:
- /* Channels 0 to 7 */
- retval = vme_master_read(card->window, &reg, 1,
- PIO2_REGS_INT_STAT[vec - 1]);
- if (retval < 0) {
- dev_err(&card->vdev->dev,
- "Unable to read IRQ status register\n");
- return;
- }
- for (i = 0; i < 8; i++) {
- channel = ((vec - 1) * 8) + i;
- if (reg & PIO2_CHANNEL_BIT[channel])
- dev_info(&card->vdev->dev,
- "Interrupt on I/O channel %d\n",
- channel);
- }
- break;
- case 5:
- case 6:
- case 7:
- case 8:
- case 9:
- case 10:
- /* Counters are dealt with by their own handler */
- dev_err(&card->vdev->dev,
- "Counter interrupt\n");
- break;
- }
-}
-
-/*
- * We return whether this has been successful - this is used in the probe to
- * ensure we have a valid card.
- */
-static int pio2_reset_card(struct pio2_card *card)
-{
- int retval = 0;
- u8 data = 0;
-
- /* Clear main register*/
- retval = vme_master_write(card->window, &data, 1, PIO2_REGS_CTRL);
- if (retval < 0)
- return retval;
-
- /* Clear VME vector */
- retval = vme_master_write(card->window, &data, 1, PIO2_REGS_VME_VECTOR);
- if (retval < 0)
- return retval;
-
- /* Reset GPIO */
- retval = pio2_gpio_reset(card);
- if (retval < 0)
- return retval;
-
- /* Reset counters */
- retval = pio2_cntr_reset(card);
- if (retval < 0)
- return retval;
-
- return 0;
-}
-
-static struct vme_driver pio2_driver = {
- .name = driver_name,
- .match = pio2_match,
- .probe = pio2_probe,
- .remove = pio2_remove,
-};
-
-static int __init pio2_init(void)
-{
- if (bus_num == 0) {
- pr_err("No cards, skipping registration\n");
- return -ENODEV;
- }
-
- if (bus_num > PIO2_CARDS_MAX) {
- pr_err("Driver only able to handle %d PIO2 Cards\n",
- PIO2_CARDS_MAX);
- bus_num = PIO2_CARDS_MAX;
- }
-
- /* Register the PIO2 driver */
- return vme_register_driver(&pio2_driver, bus_num);
-}
-
-static int pio2_match(struct vme_dev *vdev)
-{
- if (vdev->num >= bus_num) {
- dev_err(&vdev->dev,
- "The enumeration of the VMEbus to which the board is connected must be specified\n");
- return 0;
- }
-
- if (vdev->num >= base_num) {
- dev_err(&vdev->dev,
- "The VME address for the cards registers must be specified\n");
- return 0;
- }
-
- if (vdev->num >= vector_num) {
- dev_err(&vdev->dev,
- "The IRQ vector used by the card must be specified\n");
- return 0;
- }
-
- if (vdev->num >= level_num) {
- dev_err(&vdev->dev,
- "The IRQ level used by the card must be specified\n");
- return 0;
- }
-
- if (vdev->num >= variant_num) {
- dev_err(&vdev->dev, "The variant of the card must be specified\n");
- return 0;
- }
-
- return 1;
-}
-
-static int pio2_probe(struct vme_dev *vdev)
-{
- struct pio2_card *card;
- int retval;
- int i;
- u8 reg;
- int vec;
-
- card = devm_kzalloc(&vdev->dev, sizeof(*card), GFP_KERNEL);
- if (!card)
- return -ENOMEM;
-
- card->id = vdev->num;
- card->bus = bus[card->id];
- card->base = base[card->id];
- card->irq_vector = vector[card->id];
- card->irq_level = level[card->id] & PIO2_VME_INT_MASK;
- strncpy(card->variant, variant[card->id], PIO2_VARIANT_LENGTH);
- card->vdev = vdev;
-
- for (i = 0; i < PIO2_VARIANT_LENGTH; i++) {
- if (!isdigit(card->variant[i])) {
- dev_err(&card->vdev->dev, "Variant invalid\n");
- return -EINVAL;
- }
- }
-
- /*
- * Bottom 4 bits of VME interrupt vector used to determine source,
- * provided vector should only use upper 4 bits.
- */
- if (card->irq_vector & ~PIO2_VME_VECTOR_MASK) {
- dev_err(&card->vdev->dev,
- "Invalid VME IRQ Vector, vector must not use lower 4 bits\n");
- return -EINVAL;
- }
-
- /*
- * There is no way to determine the build variant or whether each bank
- * is input, output or both at run time. The inputs are also inverted
- * if configured as both.
- *
- * We pass in the board variant and use that to determine the
- * configuration of the banks.
- */
- for (i = 1; i < PIO2_VARIANT_LENGTH; i++) {
- switch (card->variant[i]) {
- case '0':
- card->bank[i - 1].config = NOFIT;
- break;
- case '1':
- case '2':
- case '3':
- case '4':
- card->bank[i - 1].config = INPUT;
- break;
- case '5':
- card->bank[i - 1].config = OUTPUT;
- break;
- case '6':
- case '7':
- case '8':
- case '9':
- card->bank[i - 1].config = BOTH;
- break;
- }
- }
-
- /* Get a master window and position over regs */
- card->window = vme_master_request(vdev, VME_A24, VME_SCT, VME_D16);
- if (!card->window) {
- dev_err(&card->vdev->dev,
- "Unable to assign VME master resource\n");
- return -EIO;
- }
-
- retval = vme_master_set(card->window, 1, card->base, 0x10000, VME_A24,
- VME_SCT | VME_USER | VME_DATA, VME_D16);
- if (retval) {
- dev_err(&card->vdev->dev,
- "Unable to configure VME master resource\n");
- goto err_set;
- }
-
- /*
- * There is also no obvious register which we can probe to determine
- * whether the provided base is valid. If we can read the "ID Register"
- * offset and the reset function doesn't error, assume we have a valid
- * location.
- */
- retval = vme_master_read(card->window, &reg, 1, PIO2_REGS_ID);
- if (retval < 0) {
- dev_err(&card->vdev->dev, "Unable to read from device\n");
- goto err_read;
- }
-
- dev_dbg(&card->vdev->dev, "ID Register:%x\n", reg);
-
- /*
- * Ensure all the I/O is cleared. We can't read back the states, so
- * this is the only method we have to ensure that the I/O is in a known
- * state.
- */
- retval = pio2_reset_card(card);
- if (retval) {
- dev_err(&card->vdev->dev,
- "Failed to reset card, is location valid?\n");
- retval = -ENODEV;
- goto err_reset;
- }
-
- /* Configure VME Interrupts */
- reg = card->irq_level;
- if (pio2_get_led(card))
- reg |= PIO2_LED;
- if (loopback)
- reg |= PIO2_LOOP;
- retval = vme_master_write(card->window, &reg, 1, PIO2_REGS_CTRL);
- if (retval < 0)
- return retval;
-
- /* Set VME vector */
- retval = vme_master_write(card->window, &card->irq_vector, 1,
- PIO2_REGS_VME_VECTOR);
- if (retval < 0)
- return retval;
-
- /* Attach spurious interrupt handler. */
- vec = card->irq_vector | PIO2_VME_VECTOR_SPUR;
-
- retval = vme_irq_request(vdev, card->irq_level, vec,
- &pio2_int, card);
- if (retval < 0) {
- dev_err(&card->vdev->dev,
- "Unable to attach VME interrupt vector0x%x, level 0x%x\n",
- vec, card->irq_level);
- goto err_irq;
- }
-
- /* Attach GPIO interrupt handlers. */
- for (i = 0; i < 4; i++) {
- vec = card->irq_vector | PIO2_VECTOR_BANK[i];
-
- retval = vme_irq_request(vdev, card->irq_level, vec,
- &pio2_int, card);
- if (retval < 0) {
- dev_err(&card->vdev->dev,
- "Unable to attach VME interrupt vector0x%x, level 0x%x\n",
- vec, card->irq_level);
- goto err_gpio_irq;
- }
- }
-
- /* Attach counter interrupt handlers. */
- for (i = 0; i < 6; i++) {
- vec = card->irq_vector | PIO2_VECTOR_CNTR[i];
-
- retval = vme_irq_request(vdev, card->irq_level, vec,
- &pio2_int, card);
- if (retval < 0) {
- dev_err(&card->vdev->dev,
- "Unable to attach VME interrupt vector0x%x, level 0x%x\n",
- vec, card->irq_level);
- goto err_cntr_irq;
- }
- }
-
- /* Register IO */
- retval = pio2_gpio_init(card);
- if (retval < 0) {
- dev_err(&card->vdev->dev,
- "Unable to register with GPIO framework\n");
- goto err_gpio;
- }
-
- /* Set LED - This also sets interrupt level */
- retval = pio2_set_led(card, 0);
- if (retval < 0) {
- dev_err(&card->vdev->dev, "Unable to set LED\n");
- goto err_led;
- }
-
- dev_set_drvdata(&card->vdev->dev, card);
-
- dev_info(&card->vdev->dev,
- "PIO2 (variant %s) configured at 0x%lx\n", card->variant,
- card->base);
-
- return 0;
-
-err_led:
- pio2_gpio_exit(card);
-err_gpio:
- i = 6;
-err_cntr_irq:
- while (i > 0) {
- i--;
- vec = card->irq_vector | PIO2_VECTOR_CNTR[i];
- vme_irq_free(vdev, card->irq_level, vec);
- }
-
- i = 4;
-err_gpio_irq:
- while (i > 0) {
- i--;
- vec = card->irq_vector | PIO2_VECTOR_BANK[i];
- vme_irq_free(vdev, card->irq_level, vec);
- }
-
- vec = (card->irq_vector & PIO2_VME_VECTOR_MASK) | PIO2_VME_VECTOR_SPUR;
- vme_irq_free(vdev, card->irq_level, vec);
-err_irq:
- pio2_reset_card(card);
-err_reset:
-err_read:
- vme_master_set(card->window, 0, 0, 0, VME_A16, 0, VME_D16);
-err_set:
- vme_master_free(card->window);
- return retval;
-}
-
-static int pio2_remove(struct vme_dev *vdev)
-{
- int vec;
- int i;
-
- struct pio2_card *card = dev_get_drvdata(&vdev->dev);
-
- pio2_gpio_exit(card);
-
- for (i = 0; i < 6; i++) {
- vec = card->irq_vector | PIO2_VECTOR_CNTR[i];
- vme_irq_free(vdev, card->irq_level, vec);
- }
-
- for (i = 0; i < 4; i++) {
- vec = card->irq_vector | PIO2_VECTOR_BANK[i];
- vme_irq_free(vdev, card->irq_level, vec);
- }
-
- vec = (card->irq_vector & PIO2_VME_VECTOR_MASK) | PIO2_VME_VECTOR_SPUR;
- vme_irq_free(vdev, card->irq_level, vec);
-
- pio2_reset_card(card);
-
- vme_master_set(card->window, 0, 0, 0, VME_A16, 0, VME_D16);
-
- vme_master_free(card->window);
-
- return 0;
-}
-
-static void __exit pio2_exit(void)
-{
- vme_unregister_driver(&pio2_driver);
-}
-
-/* These are required for each board */
-MODULE_PARM_DESC(bus, "Enumeration of VMEbus to which the board is connected");
-module_param_hw_array(bus, int, other, &bus_num, 0444);
-
-MODULE_PARM_DESC(base, "Base VME address for PIO2 Registers");
-module_param_hw_array(base, long, other, &base_num, 0444);
-
-MODULE_PARM_DESC(vector, "VME IRQ Vector (Lower 4 bits masked)");
-module_param_hw_array(vector, int, other, &vector_num, 0444);
-
-MODULE_PARM_DESC(level, "VME IRQ Level");
-module_param_hw_array(level, int, other, &level_num, 0444);
-
-MODULE_PARM_DESC(variant, "Last 4 characters of PIO2 board variant");
-module_param_array(variant, charp, &variant_num, 0444);
-
-/* This is for debugging */
-MODULE_PARM_DESC(loopback, "Enable loopback mode on all cards");
-module_param(loopback, bool, 0444);
-
-MODULE_DESCRIPTION("GE PIO2 6U VME I/O Driver");
-MODULE_AUTHOR("Martyn Welch <martyn.welch@ge.com");
-MODULE_LICENSE("GPL");
-
-module_init(pio2_init);
-module_exit(pio2_exit);
-
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.