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path: root/drivers/staging/meilhaus/me8255.c
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Diffstat (limited to 'drivers/staging/meilhaus/me8255.c')
-rw-r--r--drivers/staging/meilhaus/me8255.c462
1 files changed, 462 insertions, 0 deletions
diff --git a/drivers/staging/meilhaus/me8255.c b/drivers/staging/meilhaus/me8255.c
new file mode 100644
index 000000000000..180e7f8d2146
--- /dev/null
+++ b/drivers/staging/meilhaus/me8255.c
@@ -0,0 +1,462 @@
+/**
+ * @file me8255.c
+ *
+ * @brief 8255 subdevice instance.
+ * @note Copyright (C) 2007 Meilhaus Electronic GmbH (support@meilhaus.de)
+ * @author Guenter Gebhardt
+ */
+
+/*
+ * Copyright (C) 2007 Meilhaus Electronic GmbH (support@meilhaus.de)
+ *
+ * This file 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.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#ifndef __KERNEL__
+# define __KERNEL__
+#endif
+
+/*
+ * Includes
+ */
+#include <linux/module.h>
+
+#include <linux/slab.h>
+#include <linux/spinlock.h>
+#include <asm/io.h>
+#include <linux/types.h>
+
+#include "medefines.h"
+#include "meinternal.h"
+#include "meerror.h"
+#include "medebug.h"
+
+#include "me8255_reg.h"
+#include "me8255.h"
+
+/*
+ * Defines
+ */
+
+/*
+ * Functions
+ */
+
+static uint8_t get_mode_from_mirror(uint32_t mirror)
+{
+ PDEBUG("executed.\n");
+
+ if (mirror & ME8255_PORT_0_OUTPUT) {
+ if (mirror & ME8255_PORT_1_OUTPUT) {
+ if (mirror & ME8255_PORT_2_OUTPUT) {
+ return ME8255_MODE_OOO;
+ } else {
+ return ME8255_MODE_IOO;
+ }
+ } else {
+ if (mirror & ME8255_PORT_2_OUTPUT) {
+ return ME8255_MODE_OIO;
+ } else {
+ return ME8255_MODE_IIO;
+ }
+ }
+ } else {
+ if (mirror & ME8255_PORT_1_OUTPUT) {
+ if (mirror & ME8255_PORT_2_OUTPUT) {
+ return ME8255_MODE_OOI;
+ } else {
+ return ME8255_MODE_IOI;
+ }
+ } else {
+ if (mirror & ME8255_PORT_2_OUTPUT) {
+ return ME8255_MODE_OII;
+ } else {
+ return ME8255_MODE_III;
+ }
+ }
+ }
+}
+
+static int me8255_io_reset_subdevice(struct me_subdevice *subdevice,
+ struct file *filep, int flags)
+{
+ me8255_subdevice_t *instance;
+
+ PDEBUG("executed.\n");
+
+ instance = (me8255_subdevice_t *) subdevice;
+
+ if (flags) {
+ PERROR("Invalid flag specified.\n");
+ return ME_ERRNO_INVALID_FLAGS;
+ }
+
+ ME_SUBDEVICE_ENTER;
+
+ spin_lock(&instance->subdevice_lock);
+ spin_lock(instance->ctrl_reg_lock);
+ *instance->ctrl_reg_mirror &=
+ ~(ME8255_PORT_0_OUTPUT << instance->dio_idx);
+ outb(get_mode_from_mirror(*instance->ctrl_reg_mirror),
+ instance->ctrl_reg);
+ spin_unlock(instance->ctrl_reg_lock);
+
+ outb(0, instance->port_reg);
+ spin_unlock(&instance->subdevice_lock);
+
+ ME_SUBDEVICE_EXIT;
+
+ return ME_ERRNO_SUCCESS;
+}
+
+static int me8255_io_single_config(struct me_subdevice *subdevice,
+ struct file *filep,
+ int channel,
+ int single_config,
+ int ref,
+ int trig_chan,
+ int trig_type, int trig_edge, int flags)
+{
+ me8255_subdevice_t *instance;
+ int err = ME_ERRNO_SUCCESS;
+
+ PDEBUG("executed.\n");
+
+ instance = (me8255_subdevice_t *) subdevice;
+
+ if (flags & ~ME_IO_SINGLE_CONFIG_DIO_BYTE) {
+ PERROR("Invalid flag specified.\n");
+ return ME_ERRNO_INVALID_FLAGS;
+ }
+
+ if (channel) {
+ PERROR("Invalid channel.\n");
+ return ME_ERRNO_INVALID_CHANNEL;
+ }
+
+ ME_SUBDEVICE_ENTER;
+
+ spin_lock(&instance->subdevice_lock);
+ if (single_config == ME_SINGLE_CONFIG_DIO_INPUT) {
+ spin_lock(instance->ctrl_reg_lock);
+ *instance->ctrl_reg_mirror &=
+ ~(ME8255_PORT_0_OUTPUT << instance->dio_idx);
+ outb(get_mode_from_mirror(*instance->ctrl_reg_mirror),
+ instance->ctrl_reg);
+ spin_unlock(instance->ctrl_reg_lock);
+ } else if (single_config == ME_SINGLE_CONFIG_DIO_OUTPUT) {
+ spin_lock(instance->ctrl_reg_lock);
+ *instance->ctrl_reg_mirror |=
+ (ME8255_PORT_0_OUTPUT << instance->dio_idx);
+ outb(get_mode_from_mirror(*instance->ctrl_reg_mirror),
+ instance->ctrl_reg);
+ spin_unlock(instance->ctrl_reg_lock);
+ } else {
+ PERROR("Invalid port direction.\n");
+ err = ME_ERRNO_INVALID_SINGLE_CONFIG;
+ }
+ spin_unlock(&instance->subdevice_lock);
+
+ ME_SUBDEVICE_EXIT;
+
+ return err;
+}
+
+static int me8255_io_single_read(struct me_subdevice *subdevice,
+ struct file *filep,
+ int channel,
+ int *value, int time_out, int flags)
+{
+ me8255_subdevice_t *instance;
+ int err = ME_ERRNO_SUCCESS;
+
+ PDEBUG("executed.\n");
+
+ instance = (me8255_subdevice_t *) subdevice;
+
+ ME_SUBDEVICE_ENTER;
+
+ spin_lock(&instance->subdevice_lock);
+ switch (flags) {
+ case ME_IO_SINGLE_TYPE_DIO_BIT:
+ if ((channel >= 0) && (channel < 8)) {
+ *value = inb(instance->port_reg) & (0x1 << channel);
+ } else {
+ PERROR("Invalid bit number.\n");
+ err = ME_ERRNO_INVALID_CHANNEL;
+ }
+ break;
+
+ case ME_IO_SINGLE_NO_FLAGS:
+ case ME_IO_SINGLE_TYPE_DIO_BYTE:
+ if (channel == 0) {
+ *value = inb(instance->port_reg);
+ } else {
+ PERROR("Invalid byte number.\n");
+ err = ME_ERRNO_INVALID_CHANNEL;
+ }
+ break;
+
+ default:
+ PERROR("Invalid flags specified.\n");
+ err = ME_ERRNO_INVALID_FLAGS;
+ }
+ spin_unlock(&instance->subdevice_lock);
+
+ ME_SUBDEVICE_EXIT;
+
+ return err;
+}
+
+static int me8255_io_single_write(struct me_subdevice *subdevice,
+ struct file *filep,
+ int channel,
+ int value, int time_out, int flags)
+{
+ me8255_subdevice_t *instance;
+ uint8_t byte;
+ int err = ME_ERRNO_SUCCESS;
+
+ PDEBUG("executed.\n");
+
+ instance = (me8255_subdevice_t *) subdevice;
+
+ ME_SUBDEVICE_ENTER;
+
+ spin_lock(&instance->subdevice_lock);
+ switch (flags) {
+ case ME_IO_SINGLE_TYPE_DIO_BIT:
+ if ((channel >= 0) && (channel < 8)) {
+ if (*instance->
+ ctrl_reg_mirror & (ME8255_PORT_0_OUTPUT <<
+ instance->dio_idx)) {
+ byte = inb(instance->port_reg);
+
+ if (value)
+ byte |= 0x1 << channel;
+ else
+ byte &= ~(0x1 << channel);
+
+ outb(byte, instance->port_reg);
+ } else {
+ PERROR("Port not in output mode.\n");
+ err = ME_ERRNO_PREVIOUS_CONFIG;
+ }
+ } else {
+ PERROR("Invalid bit number.\n");
+ err = ME_ERRNO_INVALID_CHANNEL;
+ }
+ break;
+
+ case ME_IO_SINGLE_NO_FLAGS:
+ case ME_IO_SINGLE_TYPE_DIO_BYTE:
+ if (channel == 0) {
+ if (*instance->
+ ctrl_reg_mirror & (ME8255_PORT_0_OUTPUT <<
+ instance->dio_idx)) {
+ outb(value, instance->port_reg);
+ } else {
+ PERROR("Port not in output mode.\n");
+ err = ME_ERRNO_PREVIOUS_CONFIG;
+ }
+ } else {
+ PERROR("Invalid byte number.\n");
+ err = ME_ERRNO_INVALID_CHANNEL;
+ }
+ break;
+
+ default:
+ PERROR("Invalid flags specified.\n");
+ err = ME_ERRNO_INVALID_FLAGS;
+ }
+ spin_unlock(&instance->subdevice_lock);
+
+ ME_SUBDEVICE_EXIT;
+
+ return err;
+}
+
+static int me8255_query_number_channels(struct me_subdevice *subdevice,
+ int *number)
+{
+ PDEBUG("executed.\n");
+ *number = ME8255_NUMBER_CHANNELS;
+ return ME_ERRNO_SUCCESS;
+}
+
+static int me8255_query_subdevice_type(struct me_subdevice *subdevice,
+ int *type, int *subtype)
+{
+ PDEBUG("executed.\n");
+ *type = ME_TYPE_DIO;
+ *subtype = ME_SUBTYPE_SINGLE;
+ return ME_ERRNO_SUCCESS;
+}
+
+static int me8255_query_subdevice_caps(struct me_subdevice *subdevice,
+ int *caps)
+{
+ PDEBUG("executed.\n");
+ *caps = ME_CAPS_DIO_DIR_BYTE;
+ return ME_ERRNO_SUCCESS;
+}
+
+me8255_subdevice_t *me8255_constructor(uint32_t device_id,
+ uint32_t reg_base,
+ unsigned int me8255_idx,
+ unsigned int dio_idx,
+ int *ctrl_reg_mirror,
+ spinlock_t * ctrl_reg_lock)
+{
+ me8255_subdevice_t *subdevice;
+ int err;
+
+ PDEBUG("executed.\n");
+
+ /* Allocate memory for subdevice instance */
+ subdevice = kmalloc(sizeof(me8255_subdevice_t), GFP_KERNEL);
+
+ if (!subdevice) {
+ PERROR("Cannot get memory for 8255 instance.\n");
+ return NULL;
+ }
+
+ memset(subdevice, 0, sizeof(me8255_subdevice_t));
+
+ /* Check if counter index is out of range */
+
+ if (dio_idx > 2) {
+ PERROR("DIO index is out of range.\n");
+ kfree(subdevice);
+ return NULL;
+ }
+
+ /* Initialize subdevice base class */
+ err = me_subdevice_init(&subdevice->base);
+
+ if (err) {
+ PERROR("Cannot initialize subdevice base class instance.\n");
+ kfree(subdevice);
+ return NULL;
+ }
+ // Initialize spin locks.
+ spin_lock_init(&subdevice->subdevice_lock);
+
+ subdevice->ctrl_reg_lock = ctrl_reg_lock;
+
+ /* Save the pointer to global port settings */
+ subdevice->ctrl_reg_mirror = ctrl_reg_mirror;
+
+ /* Save type of Meilhaus device */
+ subdevice->device_id = device_id;
+
+ /* Save the indices */
+ subdevice->me8255_idx = me8255_idx;
+ subdevice->dio_idx = dio_idx;
+
+ /* Do device specific initialization */
+ switch (device_id) {
+ case PCI_DEVICE_ID_MEILHAUS_ME1400:
+ case PCI_DEVICE_ID_MEILHAUS_ME14E0:
+
+ case PCI_DEVICE_ID_MEILHAUS_ME140A:
+ case PCI_DEVICE_ID_MEILHAUS_ME14EA:
+ /* Check if 8255 index is out of range */
+ if (me8255_idx > 0) {
+ PERROR("8255 index is out of range.\n");
+ me_subdevice_deinit(&subdevice->base);
+ kfree(subdevice);
+ return NULL;
+ }
+
+ case PCI_DEVICE_ID_MEILHAUS_ME140B: /* Fall through */
+ case PCI_DEVICE_ID_MEILHAUS_ME14EB:
+ /* Check if 8255 index is out of range */
+ if (me8255_idx > 1) {
+ PERROR("8255 index is out of range.\n");
+ me_subdevice_deinit(&subdevice->base);
+ kfree(subdevice);
+ return NULL;
+ }
+
+ /* Get the registers */
+ if (me8255_idx == 0) {
+ subdevice->ctrl_reg = reg_base + ME1400AB_PORT_A_CTRL;
+ subdevice->port_reg =
+ reg_base + ME1400AB_PORT_A_0 + dio_idx;
+ } else if (me8255_idx == 1) {
+ subdevice->ctrl_reg = reg_base + ME1400AB_PORT_B_CTRL;
+ subdevice->port_reg =
+ reg_base + ME1400AB_PORT_B_0 + dio_idx;
+ }
+
+ break;
+
+ case PCI_DEVICE_ID_MEILHAUS_ME140C:
+ /* Check if 8255 index is out of range */
+ if (me8255_idx > 0) {
+ PERROR("8255 index is out of range.\n");
+ me_subdevice_deinit(&subdevice->base);
+ kfree(subdevice);
+ return NULL;
+ }
+
+ case PCI_DEVICE_ID_MEILHAUS_ME140D: /* Fall through */
+ /* Check if 8255 index is out of range */
+ if (me8255_idx > 1) {
+ PERROR("8255 index is out of range.\n");
+ me_subdevice_deinit(&subdevice->base);
+ kfree(subdevice);
+ return NULL;
+ }
+
+ /* Get the registers */
+ if (me8255_idx == 0) {
+ subdevice->ctrl_reg = reg_base + ME1400CD_PORT_A_CTRL;
+ subdevice->port_reg =
+ reg_base + ME1400CD_PORT_A_0 + dio_idx;
+ } else if (me8255_idx == 1) {
+ subdevice->ctrl_reg = reg_base + ME1400CD_PORT_B_CTRL;
+ subdevice->port_reg =
+ reg_base + ME1400CD_PORT_B_0 + dio_idx;
+ }
+
+ break;
+
+ default:
+ PERROR("Unknown device type. dev ID: 0x%04x\n", device_id);
+
+ me_subdevice_deinit(&subdevice->base);
+
+ kfree(subdevice);
+
+ return NULL;
+ }
+
+ /* Overload subdevice base class methods. */
+ subdevice->base.me_subdevice_io_reset_subdevice =
+ me8255_io_reset_subdevice;
+ subdevice->base.me_subdevice_io_single_config = me8255_io_single_config;
+ subdevice->base.me_subdevice_io_single_read = me8255_io_single_read;
+ subdevice->base.me_subdevice_io_single_write = me8255_io_single_write;
+ subdevice->base.me_subdevice_query_number_channels =
+ me8255_query_number_channels;
+ subdevice->base.me_subdevice_query_subdevice_type =
+ me8255_query_subdevice_type;
+ subdevice->base.me_subdevice_query_subdevice_caps =
+ me8255_query_subdevice_caps;
+
+ return subdevice;
+}