--- /dev/null
+/**
+ * tpci200.c
+ *
+ * driver for the TEWS TPCI-200 device
+ * Copyright (c) 2009 Nicolas Serafini, EIC2 SA
+ * Copyright (c) 2010,2011 Samuel Iglesias Gonsalvez <siglesia@cern.ch>, CERN
+ * Copyright (c) 2012 Samuel Iglesias Gonsalvez <siglesias@igalia.com>, Igalia
+ *
+ * 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 "tpci200.h"
+
+struct ipack_bus_ops tpci200_bus_ops;
+
+/* TPCI200 controls registers */
+static int control_reg[] = {
+ TPCI200_CONTROL_A_REG,
+ TPCI200_CONTROL_B_REG,
+ TPCI200_CONTROL_C_REG,
+ TPCI200_CONTROL_D_REG
+};
+
+/* Linked list to save the registered devices */
+static LIST_HEAD(tpci200_list);
+
+static int tpci200_slot_unregister(struct ipack_device *dev);
+
+static struct tpci200_board *check_slot(struct ipack_device *dev)
+{
+ struct tpci200_board *tpci200;
+ int found = 0;
+
+ if (dev == NULL) {
+ pr_info("Slot doesn't exist.\n");
+ return NULL;
+ }
+
+ list_for_each_entry(tpci200, &tpci200_list, list) {
+ if (tpci200->number == dev->bus_nr) {
+ found = 1;
+ break;
+ }
+ }
+
+ if (!found) {
+ pr_err("Carrier not found\n");
+ return NULL;
+ }
+
+ if (dev->slot >= TPCI200_NB_SLOT) {
+ pr_info("Slot [%s %d:%d] doesn't exist! Last tpci200 slot is %d.\n",
+ TPCI200_SHORTNAME, dev->bus_nr, dev->slot,
+ TPCI200_NB_SLOT-1);
+ return NULL;
+ }
+
+ BUG_ON(tpci200->slots == NULL);
+ if (tpci200->slots[dev->slot].dev == NULL) {
+ pr_info("Slot [%s %d:%d] is not registered !\n",
+ TPCI200_SHORTNAME, dev->bus_nr, dev->slot);
+ return NULL;
+ }
+
+ return tpci200;
+}
+
+static inline unsigned char __tpci200_read8(void *address, unsigned long offset)
+{
+ return ioread8(address + (offset^1));
+}
+
+static inline unsigned short __tpci200_read16(void *address,
+ unsigned long offset)
+{
+ return ioread16(address + offset);
+}
+
+static inline unsigned int __tpci200_read32(void *address, unsigned long offset)
+{
+ return swahw32(ioread32(address + offset));
+}
+
+static inline void __tpci200_write8(unsigned char value,
+ void *address, unsigned long offset)
+{
+ iowrite8(value, address+(offset^1));
+}
+
+static inline void __tpci200_write16(unsigned short value, void *address,
+ unsigned long offset)
+{
+ iowrite16(value, address+offset);
+}
+
+static inline void __tpci200_write32(unsigned int value, void *address,
+ unsigned long offset)
+{
+ iowrite32(swahw32(value), address+offset);
+}
+
+static struct ipack_addr_space *get_slot_address_space(struct ipack_device *dev,
+ int space)
+{
+ struct ipack_addr_space *addr;
+
+ switch (space) {
+ case IPACK_IO_SPACE:
+ addr = &dev->io_space;
+ break;
+ case IPACK_ID_SPACE:
+ addr = &dev->id_space;
+ break;
+ case IPACK_MEM_SPACE:
+ addr = &dev->mem_space;
+ break;
+ default:
+ pr_err("Slot [%s %d:%d] space number %d doesn't exist !\n",
+ TPCI200_SHORTNAME, dev->bus_nr, dev->slot, space);
+ return NULL;
+ break;
+ }
+
+ if ((addr->size == 0) || (addr->address == NULL)) {
+ pr_err("Error, slot space not mapped !\n");
+ return NULL;
+ }
+
+ return addr;
+}
+
+static int tpci200_read8(struct ipack_device *dev, int space,
+ unsigned long offset, unsigned char *value)
+{
+ struct ipack_addr_space *addr;
+ struct tpci200_board *tpci200;
+
+ tpci200 = check_slot(dev);
+ if (tpci200 == NULL)
+ return -EINVAL;
+
+ addr = get_slot_address_space(dev, space);
+ if (addr == NULL)
+ return -EINVAL;
+
+ if (offset >= addr->size) {
+ pr_err("Error, slot space offset error !\n");
+ return -EFAULT;
+ }
+
+ *value = __tpci200_read8(addr->address, offset);
+
+ return 0;
+}
+
+static int tpci200_read16(struct ipack_device *dev, int space,
+ unsigned long offset, unsigned short *value)
+{
+ struct ipack_addr_space *addr;
+ struct tpci200_board *tpci200;
+
+ tpci200 = check_slot(dev);
+ if (tpci200 == NULL)
+ return -EINVAL;
+
+ addr = get_slot_address_space(dev, space);
+ if (addr == NULL)
+ return -EINVAL;
+
+ if ((offset+2) >= addr->size) {
+ pr_err("Error, slot space offset error !\n");
+ return -EFAULT;
+ }
+ *value = __tpci200_read16(addr->address, offset);
+
+ return 0;
+}
+
+static int tpci200_read32(struct ipack_device *dev, int space,
+ unsigned long offset, unsigned int *value)
+{
+ struct ipack_addr_space *addr;
+ struct tpci200_board *tpci200;
+
+ tpci200 = check_slot(dev);
+ if (tpci200 == NULL)
+ return -EINVAL;
+
+ addr = get_slot_address_space(dev, space);
+ if (addr == NULL)
+ return -EINVAL;
+
+ if ((offset+4) >= addr->size) {
+ pr_err("Error, slot space offset error !\n");
+ return -EFAULT;
+ }
+
+ *value = __tpci200_read32(addr->address, offset);
+
+ return 0;
+}
+
+static int tpci200_write8(struct ipack_device *dev, int space,
+ unsigned long offset, unsigned char value)
+{
+ struct ipack_addr_space *addr;
+ struct tpci200_board *tpci200;
+
+ tpci200 = check_slot(dev);
+ if (tpci200 == NULL)
+ return -EINVAL;
+
+ addr = get_slot_address_space(dev, space);
+ if (addr == NULL)
+ return -EINVAL;
+
+ if (offset >= addr->size) {
+ pr_err("Error, slot space offset error !\n");
+ return -EFAULT;
+ }
+
+ __tpci200_write8(value, addr->address, offset);
+
+ return 0;
+}
+
+static int tpci200_write16(struct ipack_device *dev, int space,
+ unsigned long offset, unsigned short value)
+{
+ struct ipack_addr_space *addr;
+ struct tpci200_board *tpci200;
+
+ tpci200 = check_slot(dev);
+ if (tpci200 == NULL)
+ return -EINVAL;
+
+ addr = get_slot_address_space(dev, space);
+ if (addr == NULL)
+ return -EINVAL;
+
+ if ((offset+2) >= addr->size) {
+ pr_err("Error, slot space offset error !\n");
+ return -EFAULT;
+ }
+
+ __tpci200_write16(value, addr->address, offset);
+
+ return 0;
+}
+
+static int tpci200_write32(struct ipack_device *dev, int space,
+ unsigned long offset, unsigned int value)
+{
+ struct ipack_addr_space *addr;
+ struct tpci200_board *tpci200;
+
+ tpci200 = check_slot(dev);
+ if (tpci200 == NULL)
+ return -EINVAL;
+
+ addr = get_slot_address_space(dev, space);
+ if (addr == NULL)
+ return -EINVAL;
+
+ if ((offset+4) >= addr->size) {
+ pr_err("Error, slot space offset error !\n");
+ return -EFAULT;
+ }
+
+ __tpci200_write32(value, addr->address, offset);
+
+ return 0;
+}
+
+static void tpci200_unregister(struct tpci200_board *tpci200)
+{
+ int i;
+
+ free_irq(tpci200->info->pdev->irq, (void *) tpci200);
+
+ pci_iounmap(tpci200->info->pdev, tpci200->info->interface_regs);
+ pci_iounmap(tpci200->info->pdev, tpci200->info->ioidint_space);
+ pci_iounmap(tpci200->info->pdev, tpci200->info->mem8_space);
+
+ pci_release_region(tpci200->info->pdev, TPCI200_IP_INTERFACE_BAR);
+ pci_release_region(tpci200->info->pdev, TPCI200_IO_ID_INT_SPACES_BAR);
+ pci_release_region(tpci200->info->pdev, TPCI200_MEM8_SPACE_BAR);
+
+ pci_disable_device(tpci200->info->pdev);
+ pci_dev_put(tpci200->info->pdev);
+
+ kfree(tpci200->info);
+
+ for (i = 0; i < TPCI200_NB_SLOT; i++) {
+ tpci200->slots[i].io_phys.address = NULL;
+ tpci200->slots[i].io_phys.size = 0;
+ tpci200->slots[i].id_phys.address = NULL;
+ tpci200->slots[i].id_phys.size = 0;
+ tpci200->slots[i].mem_phys.address = NULL;
+ tpci200->slots[i].mem_phys.size = 0;
+ }
+}
+
+static irqreturn_t tpci200_interrupt(int irq, void *dev_id)
+{
+ struct tpci200_board *tpci200 = (struct tpci200_board *) dev_id;
+ int i;
+ unsigned long flags;
+ unsigned short status_reg, reg_value;
+ unsigned short unhandled_ints = 0;
+ irqreturn_t ret = IRQ_NONE;
+
+ spin_lock_irqsave(&tpci200->info->access_lock, flags);
+
+ /* Read status register */
+ status_reg = readw((unsigned short *) (tpci200->info->interface_regs +
+ TPCI200_STATUS_REG));
+
+ if (status_reg & TPCI200_SLOT_INT_MASK) {
+ unhandled_ints = status_reg & TPCI200_SLOT_INT_MASK;
+ /* callback to the IRQ handler for the corresponding slot */
+ for (i = 0; i < TPCI200_NB_SLOT; i++) {
+ if ((tpci200->slots[i].irq != NULL) &&
+ (status_reg & ((TPCI200_A_INT0 | TPCI200_A_INT1) << (2*i)))) {
+
+ ret = tpci200->slots[i].irq->handler(tpci200->slots[i].irq->arg);
+
+ /* Dummy reads */
+ readw((unsigned short *)
+ (tpci200->slots[i].dev->io_space.address +
+ 0xC0));
+ readw((unsigned short *)
+ (tpci200->slots[i].dev->io_space.address +
+ 0xC2));
+
+ unhandled_ints &= ~(((TPCI200_A_INT0 | TPCI200_A_INT1) << (2*i)));
+ }
+ }
+ }
+ /* Interrupt not handled are disabled */
+ if (unhandled_ints) {
+ for (i = 0; i < TPCI200_NB_SLOT; i++) {
+ if (unhandled_ints & ((TPCI200_INT0_EN | TPCI200_INT1_EN) << (2*i))) {
+ pr_info("No registered ISR for slot [%s %d:%d]!. IRQ will be disabled.\n",
+ TPCI200_SHORTNAME,
+ tpci200->number, i);
+ reg_value = readw((unsigned short *)(tpci200->info->interface_regs +
+ control_reg[i]));
+ reg_value &=
+ ~(TPCI200_INT0_EN | TPCI200_INT1_EN);
+ writew(reg_value, (unsigned short *)(tpci200->info->interface_regs +
+ control_reg[i]));
+ }
+ }
+ }
+
+ spin_unlock_irqrestore(&tpci200->info->access_lock, flags);
+ return ret;
+}
+
+#ifdef CONFIG_SYSFS
+
+static struct ipack_device *tpci200_slot_register(const char *board_name,
+ int size,
+ unsigned int tpci200_number,
+ unsigned int slot_position)
+{
+ int found = 0;
+ struct ipack_device *dev = NULL;
+ struct tpci200_board *tpci200;
+
+ list_for_each_entry(tpci200, &tpci200_list, list) {
+ if (tpci200->number == tpci200_number) {
+ found = 1;
+ break;
+ }
+ }
+
+ if (!found) {
+ pr_err("carrier board not found for the device\n");
+ return NULL;
+ }
+
+ if (slot_position >= TPCI200_NB_SLOT) {
+ pr_info("Slot [%s %d:%d] doesn't exist!\n",
+ TPCI200_SHORTNAME, tpci200_number, slot_position);
+ goto out;
+ }
+
+ if (mutex_lock_interruptible(&tpci200->mutex))
+ goto out;
+
+ if (tpci200->slots[slot_position].dev != NULL) {
+ pr_err("Slot [%s %d:%d] already installed !\n",
+ TPCI200_SHORTNAME, tpci200_number, slot_position);
+ goto out_unlock;
+ }
+
+ dev = kzalloc(sizeof(struct ipack_device), GFP_KERNEL);
+ if (dev == NULL) {
+ pr_info("Slot [%s %d:%d] Unable to allocate memory for new slot !\n",
+ TPCI200_SHORTNAME,
+ tpci200_number, slot_position);
+ goto out_unlock;
+ }
+
+ if (size > IPACK_BOARD_NAME_SIZE) {
+ pr_warning("Slot [%s %d:%d] name (%s) too long (%d > %d). Will be truncated!\n",
+ TPCI200_SHORTNAME, tpci200_number, slot_position,
+ board_name, (int)strlen(board_name),
+ IPACK_BOARD_NAME_SIZE);
+
+ size = IPACK_BOARD_NAME_SIZE;
+ }
+
+ strncpy(dev->board_name, board_name, size-1);
+ dev->board_name[size-1] = '\0';
+ dev->bus_nr = tpci200->info->drv.bus_nr;
+ dev->slot = slot_position;
+ /*
+ * Give the same IRQ number as the slot number.
+ * The TPCI200 has assigned his own two IRQ by PCI bus driver
+ */
+ dev->irq = slot_position;
+
+ dev->id_space.address = NULL;
+ dev->id_space.size = 0;
+ dev->io_space.address = NULL;
+ dev->io_space.size = 0;
+ dev->mem_space.address = NULL;
+ dev->mem_space.size = 0;
+
+ /* Give the operations structure */
+ dev->ops = &tpci200_bus_ops;
+ tpci200->slots[slot_position].dev = dev;
+
+ if (ipack_device_register(dev) < 0) {
+ tpci200_slot_unregister(dev);
+ kfree(dev);
+ }
+
+out_unlock:
+ mutex_unlock(&tpci200->mutex);
+out:
+ return dev;
+}
+
+static ssize_t tpci200_store_board(struct device *pdev, const char *buf,
+ size_t count, int slot)
+{
+ struct tpci200_board *card = dev_get_drvdata(pdev);
+ struct ipack_device *dev = card->slots[slot].dev;
+
+ if (dev != NULL)
+ return -EBUSY;
+
+ dev = tpci200_slot_register(buf, count, card->number, slot);
+ if (dev == NULL)
+ return -ENODEV;
+
+ return count;
+}
+
+static ssize_t tpci200_show_board(struct device *pdev, char *buf, int slot)
+{
+ struct tpci200_board *card = dev_get_drvdata(pdev);
+ struct ipack_device *dev = card->slots[slot].dev;
+
+ if (dev != NULL)
+ return snprintf(buf, PAGE_SIZE, "%s\n", dev->board_name);
+ else
+ return snprintf(buf, PAGE_SIZE, "none\n");
+}
+
+static ssize_t tpci200_show_description(struct device *pdev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ return snprintf(buf, PAGE_SIZE,
+ "TEWS tpci200 carrier PCI for Industry-pack mezzanines.\n");
+}
+
+static ssize_t tpci200_show_board_slot0(struct device *pdev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ return tpci200_show_board(pdev, buf, 0);
+}
+
+static ssize_t tpci200_store_board_slot0(struct device *pdev,
+ struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ return tpci200_store_board(pdev, buf, count, 0);
+}
+
+static ssize_t tpci200_show_board_slot1(struct device *pdev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ return tpci200_show_board(pdev, buf, 1);
+}
+
+static ssize_t tpci200_store_board_slot1(struct device *pdev,
+ struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ return tpci200_store_board(pdev, buf, count, 1);
+}
+
+static ssize_t tpci200_show_board_slot2(struct device *pdev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ return tpci200_show_board(pdev, buf, 2);
+}
+
+static ssize_t tpci200_store_board_slot2(struct device *pdev,
+ struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ return tpci200_store_board(pdev, buf, count, 2);
+}
+
+
+static ssize_t tpci200_show_board_slot3(struct device *pdev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ return tpci200_show_board(pdev, buf, 3);
+}
+
+static ssize_t tpci200_store_board_slot3(struct device *pdev,
+ struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ return tpci200_store_board(pdev, buf, count, 3);
+}
+
+/* Declaration of the device attributes for the TPCI200 */
+static DEVICE_ATTR(description, S_IRUGO,
+ tpci200_show_description, NULL);
+static DEVICE_ATTR(board_slot0, S_IRUGO | S_IWUSR,
+ tpci200_show_board_slot0, tpci200_store_board_slot0);
+static DEVICE_ATTR(board_slot1, S_IRUGO | S_IWUSR,
+ tpci200_show_board_slot1, tpci200_store_board_slot1);
+static DEVICE_ATTR(board_slot2, S_IRUGO | S_IWUSR,
+ tpci200_show_board_slot2, tpci200_store_board_slot2);
+static DEVICE_ATTR(board_slot3, S_IRUGO | S_IWUSR,
+ tpci200_show_board_slot3, tpci200_store_board_slot3);
+
+static struct attribute *tpci200_attrs[] = {
+ &dev_attr_description.attr,
+ &dev_attr_board_slot0.attr,
+ &dev_attr_board_slot1.attr,
+ &dev_attr_board_slot2.attr,
+ &dev_attr_board_slot3.attr,
+ NULL,
+};
+
+static struct attribute_group tpci200_attr_group = {
+ .attrs = tpci200_attrs,
+};
+
+static int tpci200_create_sysfs_files(struct tpci200_board *card)
+{
+ return sysfs_create_group(&card->info->pdev->dev.kobj,
+ &tpci200_attr_group);
+}
+
+static void tpci200_remove_sysfs_files(struct tpci200_board *card)
+{
+ sysfs_remove_group(&card->info->pdev->dev.kobj, &tpci200_attr_group);
+}
+
+#else
+
+static int tpci200_create_sysfs_files(struct tpci200_board *card)
+{
+ return 0;
+}
+
+static void tpci200_remove_sysfs_files(struct tpci200_board *card)
+{
+}
+
+#endif /* CONFIG_SYSFS */
+
+static int tpci200_register(struct tpci200_board *tpci200)
+{
+ int i;
+ int res;
+ unsigned long ioidint_base;
+ unsigned long mem_base;
+ unsigned short slot_ctrl;
+
+ if (pci_enable_device(tpci200->info->pdev) < 0)
+ return -ENODEV;
+
+ if (tpci200_create_sysfs_files(tpci200) < 0) {
+ pr_err("failed creating sysfs files\n");
+ res = -EFAULT;
+ goto out_disable_pci;
+ }
+
+ /* Request IP interface register (Bar 2) */
+ res = pci_request_region(tpci200->info->pdev, TPCI200_IP_INTERFACE_BAR,
+ "Carrier IP interface registers");
+ if (res) {
+ pr_err("(bn 0x%X, sn 0x%X) failed to allocate PCI resource for BAR 2 !",
+ tpci200->info->pdev->bus->number,
+ tpci200->info->pdev->devfn);
+ goto out_remove_sysfs;
+ }
+
+ /* Request IO ID INT space (Bar 3) */
+ res = pci_request_region(tpci200->info->pdev,
+ TPCI200_IO_ID_INT_SPACES_BAR,
+ "Carrier IO ID INT space");
+ if (res) {
+ pr_err("(bn 0x%X, sn 0x%X) failed to allocate PCI resource for BAR 3 !",
+ tpci200->info->pdev->bus->number,
+ tpci200->info->pdev->devfn);
+ goto out_release_ip_space;
+ }
+
+ /* Request MEM space (Bar 4) */
+ res = pci_request_region(tpci200->info->pdev, TPCI200_MEM8_SPACE_BAR,
+ "Carrier MEM space");
+ if (res) {
+ pr_err("(bn 0x%X, sn 0x%X) failed to allocate PCI resource for BAR 4!",
+ tpci200->info->pdev->bus->number,
+ tpci200->info->pdev->devfn);
+ goto out_release_ioid_int_space;
+ }
+
+ /* Map internal tpci200 driver user space */
+ tpci200->info->interface_regs =
+ ioremap(pci_resource_start(tpci200->info->pdev,
+ TPCI200_IP_INTERFACE_BAR),
+ TPCI200_IFACE_SIZE);
+ tpci200->info->ioidint_space =
+ ioremap(pci_resource_start(tpci200->info->pdev,
+ TPCI200_IO_ID_INT_SPACES_BAR),
+ TPCI200_IOIDINT_SIZE);
+ tpci200->info->mem8_space =
+ ioremap(pci_resource_start(tpci200->info->pdev,
+ TPCI200_MEM8_SPACE_BAR),
+ TPCI200_MEM8_SIZE);
+
+ spin_lock_init(&tpci200->info->access_lock);
+ ioidint_base = pci_resource_start(tpci200->info->pdev,
+ TPCI200_IO_ID_INT_SPACES_BAR);
+ mem_base = pci_resource_start(tpci200->info->pdev,
+ TPCI200_MEM8_SPACE_BAR);
+
+ /* Set the default parameters of the slot
+ * INT0 disabled, level sensitive
+ * INT1 disabled, level sensitive
+ * error interrupt disabled
+ * timeout interrupt disabled
+ * recover time disabled
+ * clock rate 8 MHz
+ */
+ slot_ctrl = 0;
+
+ /* Set all slot physical address space */
+ for (i = 0; i < TPCI200_NB_SLOT; i++) {
+ tpci200->slots[i].io_phys.address =
+ (void *)ioidint_base +
+ TPCI200_IO_SPACE_OFF + TPCI200_IO_SPACE_GAP*i;
+ tpci200->slots[i].io_phys.size = TPCI200_IO_SPACE_SIZE;
+
+ tpci200->slots[i].id_phys.address =
+ (void *)ioidint_base +
+ TPCI200_ID_SPACE_OFF + TPCI200_ID_SPACE_GAP*i;
+ tpci200->slots[i].id_phys.size = TPCI200_ID_SPACE_SIZE;
+
+ tpci200->slots[i].mem_phys.address =
+ (void *)mem_base + TPCI200_MEM8_GAP*i;
+ tpci200->slots[i].mem_phys.size = TPCI200_MEM8_SIZE;
+
+ writew(slot_ctrl,
+ (unsigned short *)(tpci200->info->interface_regs +
+ control_reg[i]));
+ }
+
+ res = request_irq(tpci200->info->pdev->irq,
+ tpci200_interrupt, IRQF_SHARED,
+ TPCI200_SHORTNAME, (void *) tpci200);
+ if (res) {
+ pr_err("(bn 0x%X, sn 0x%X) unable to register IRQ !",
+ tpci200->info->pdev->bus->number,
+ tpci200->info->pdev->devfn);
+ tpci200_unregister(tpci200);
+ goto out_err;
+ }
+
+ return 0;
+
+out_release_ioid_int_space:
+ pci_release_region(tpci200->info->pdev, TPCI200_IO_ID_INT_SPACES_BAR);
+out_release_ip_space:
+ pci_release_region(tpci200->info->pdev, TPCI200_IP_INTERFACE_BAR);
+out_remove_sysfs:
+ tpci200_remove_sysfs_files(tpci200);
+out_disable_pci:
+ pci_disable_device(tpci200->info->pdev);
+out_err:
+ return res;
+}
+
+static int __tpci200_request_irq(struct tpci200_board *tpci200,
+ struct ipack_device *dev)
+{
+ unsigned short slot_ctrl;
+
+ /* Set the default parameters of the slot
+ * INT0 enabled, level sensitive
+ * INT1 enabled, level sensitive
+ * error interrupt disabled
+ * timeout interrupt disabled
+ * recover time disabled
+ * clock rate 8 MHz
+ */
+ slot_ctrl = TPCI200_INT0_EN | TPCI200_INT1_EN;
+ writew(slot_ctrl, (unsigned short *)(tpci200->info->interface_regs +
+ control_reg[dev->slot]));
+
+ return 0;
+}
+
+static void __tpci200_free_irq(struct tpci200_board *tpci200,
+ struct ipack_device *dev)
+{
+ unsigned short slot_ctrl;
+
+ /* Set the default parameters of the slot
+ * INT0 disabled, level sensitive
+ * INT1 disabled, level sensitive
+ * error interrupt disabled
+ * timeout interrupt disabled
+ * recover time disabled
+ * clock rate 8 MHz
+ */
+ slot_ctrl = 0;
+ writew(slot_ctrl, (unsigned short *)(tpci200->info->interface_regs +
+ control_reg[dev->slot]));
+}
+
+static int tpci200_free_irq(struct ipack_device *dev)
+{
+ int res;
+ struct slot_irq *slot_irq;
+ struct tpci200_board *tpci200;
+
+ tpci200 = check_slot(dev);
+ if (tpci200 == NULL) {
+ res = -EINVAL;
+ goto out;
+ }
+
+ if (mutex_lock_interruptible(&tpci200->mutex)) {
+ res = -ERESTARTSYS;
+ goto out;
+ }
+
+ if (tpci200->slots[dev->slot].irq == NULL) {
+ res = -EINVAL;
+ goto out_unlock;
+ }
+
+ __tpci200_free_irq(tpci200, dev);
+ slot_irq = tpci200->slots[dev->slot].irq;
+ tpci200->slots[dev->slot].irq = NULL;
+ kfree(slot_irq);
+
+out_unlock:
+ mutex_unlock(&tpci200->mutex);
+out:
+ return res;
+}
+
+static int tpci200_slot_unmap_space(struct ipack_device *dev, int space)
+{
+ int res;
+ struct ipack_addr_space *virt_addr_space;
+ struct tpci200_board *tpci200;
+
+ tpci200 = check_slot(dev);
+ if (tpci200 == NULL) {
+ res = -EINVAL;
+ goto out;
+ }
+
+ if (mutex_lock_interruptible(&tpci200->mutex)) {
+ res = -ERESTARTSYS;
+ goto out;
+ }
+
+ switch (space) {
+ case IPACK_IO_SPACE:
+ if (dev->io_space.address == NULL) {
+ pr_info("Slot [%s %d:%d] IO space not mapped !\n",
+ TPCI200_SHORTNAME, dev->bus_nr, dev->slot);
+ goto out_unlock;
+ }
+ virt_addr_space = &dev->io_space;
+ break;
+ case IPACK_ID_SPACE:
+ if (dev->id_space.address == NULL) {
+ pr_info("Slot [%s %d:%d] ID space not mapped !\n",
+ TPCI200_SHORTNAME, dev->bus_nr, dev->slot);
+ goto out_unlock;
+ }
+ virt_addr_space = &dev->id_space;
+ break;
+ case IPACK_MEM_SPACE:
+ if (dev->mem_space.address == NULL) {
+ pr_info("Slot [%s %d:%d] MEM space not mapped !\n",
+ TPCI200_SHORTNAME, dev->bus_nr, dev->slot);
+ goto out_unlock;
+ }
+ virt_addr_space = &dev->mem_space;
+ break;
+ default:
+ pr_err("Slot [%s %d:%d] space number %d doesn't exist !\n",
+ TPCI200_SHORTNAME, dev->bus_nr, dev->slot, space);
+ res = -EINVAL;
+ goto out_unlock;
+ break;
+ }
+
+ iounmap(virt_addr_space->address);
+
+ virt_addr_space->address = NULL;
+ virt_addr_space->size = 0;
+out_unlock:
+ mutex_unlock(&tpci200->mutex);
+out:
+ return res;
+}
+
+static int tpci200_slot_unregister(struct ipack_device *dev)
+{
+ struct tpci200_board *tpci200;
+
+ if (dev == NULL)
+ return -ENODEV;
+
+ tpci200 = check_slot(dev);
+ if (tpci200 == NULL)
+ return -EINVAL;
+
+ tpci200_free_irq(dev);
+
+ if (mutex_lock_interruptible(&tpci200->mutex))
+ return -ERESTARTSYS;
+
+ ipack_device_unregister(dev);
+ kfree(dev);
+ tpci200->slots[dev->slot].dev = NULL;
+ mutex_unlock(&tpci200->mutex);
+
+ return 0;
+}
+
+static int tpci200_slot_map_space(struct ipack_device *dev,
+ unsigned int memory_size, int space)
+{
+ int res;
+ unsigned int size_to_map;
+ void *phys_address;
+ struct ipack_addr_space *virt_addr_space;
+ struct tpci200_board *tpci200;
+
+ tpci200 = check_slot(dev);
+ if (tpci200 == NULL) {
+ res = -EINVAL;
+ goto out;
+ }
+
+ if (mutex_lock_interruptible(&tpci200->mutex)) {
+ res = -ERESTARTSYS;
+ goto out;
+ }
+
+ switch (space) {
+ case IPACK_IO_SPACE:
+ if (dev->io_space.address != NULL) {
+ pr_err("Slot [%s %d:%d] IO space already mapped !\n",
+ TPCI200_SHORTNAME, tpci200->number, dev->slot);
+ res = -EINVAL;
+ goto out_unlock;
+ }
+ virt_addr_space = &dev->io_space;
+
+ phys_address = tpci200->slots[dev->slot].io_phys.address;
+ size_to_map = tpci200->slots[dev->slot].io_phys.size;
+ break;
+ case IPACK_ID_SPACE:
+ if (dev->id_space.address != NULL) {
+ pr_err("Slot [%s %d:%d] ID space already mapped !\n",
+ TPCI200_SHORTNAME, tpci200->number, dev->slot);
+ res = -EINVAL;
+ goto out_unlock;
+ }
+ virt_addr_space = &dev->id_space;
+
+ phys_address = tpci200->slots[dev->slot].id_phys.address;
+ size_to_map = tpci200->slots[dev->slot].id_phys.size;
+ break;
+ case IPACK_MEM_SPACE:
+ if (dev->mem_space.address != NULL) {
+ pr_err("Slot [%s %d:%d] MEM space already mapped !\n",
+ TPCI200_SHORTNAME,
+ tpci200->number, dev->slot);
+ res = -EINVAL;
+ goto out_unlock;
+ }
+ virt_addr_space = &dev->mem_space;
+
+ if (memory_size > tpci200->slots[dev->slot].mem_phys.size) {
+ pr_err("Slot [%s %d:%d] request is 0x%X memory, only 0x%X available !\n",
+ TPCI200_SHORTNAME, dev->bus_nr, dev->slot,
+ memory_size, tpci200->slots[dev->slot].mem_phys.size);
+ res = -EINVAL;
+ goto out_unlock;
+ }
+
+ phys_address = tpci200->slots[dev->slot].mem_phys.address;
+ size_to_map = memory_size;
+ break;
+ default:
+ pr_err("Slot [%s %d:%d] space %d doesn't exist !\n",
+ TPCI200_SHORTNAME,
+ tpci200->number, dev->slot, space);
+ res = -EINVAL;
+ goto out_unlock;
+ break;
+ }
+
+ virt_addr_space->size = size_to_map;
+ virt_addr_space->address =
+ ioremap((unsigned long)phys_address, size_to_map);
+
+out_unlock:
+ mutex_unlock(&tpci200->mutex);
+out:
+ return res;
+}
+
+static int tpci200_request_irq(struct ipack_device *dev, int vector,
+ int (*handler)(void *), void *arg)
+{
+ int res;
+ struct slot_irq *slot_irq;
+ struct tpci200_board *tpci200;
+
+ tpci200 = check_slot(dev);
+ if (tpci200 == NULL) {
+ res = -EINVAL;
+ goto out;
+ }
+
+ if (mutex_lock_interruptible(&tpci200->mutex)) {
+ res = -ERESTARTSYS;
+ goto out;
+ }
+
+ if (tpci200->slots[dev->slot].irq != NULL) {
+ pr_err("Slot [%s %d:%d] IRQ already registered !\n",
+ TPCI200_SHORTNAME, dev->bus_nr, dev->slot);
+ res = -EINVAL;
+ goto out_unlock;
+ }
+
+ slot_irq = kzalloc(sizeof(struct slot_irq), GFP_KERNEL);
+ if (slot_irq == NULL) {
+ pr_err("Slot [%s %d:%d] unable to allocate memory for IRQ !\n",
+ TPCI200_SHORTNAME, dev->bus_nr, dev->slot);
+ res = -ENOMEM;
+ goto out_unlock;
+ }
+
+ /*
+ * WARNING: Setup Interrupt Vector in the IndustryPack device
+ * before an IRQ request.
+ * Read the User Manual of your IndustryPack device to know
+ * where to write the vector in memory.
+ */
+ slot_irq->vector = vector;
+ slot_irq->handler = handler;
+ slot_irq->arg = arg;
+ if (dev->board_name) {
+ if (strlen(dev->board_name) > IPACK_IRQ_NAME_SIZE) {
+ pr_warning("Slot [%s %d:%d] IRQ name too long (%d char > %d char MAX). Will be truncated!\n",
+ TPCI200_SHORTNAME, dev->bus_nr, dev->slot,
+ (int)strlen(dev->board_name),
+ IPACK_IRQ_NAME_SIZE);
+ }
+ strncpy(slot_irq->name, dev->board_name, IPACK_IRQ_NAME_SIZE-1);
+ } else {
+ strcpy(slot_irq->name, "Unknown");
+ }
+
+ tpci200->slots[dev->slot].irq = slot_irq;
+ res = __tpci200_request_irq(tpci200, dev);
+
+out_unlock:
+ mutex_unlock(&tpci200->mutex);
+out:
+ return res;
+}
+
+static void tpci200_slot_remove(struct tpci200_slot *slot)
+{
+ if ((slot->dev == NULL) ||
+ (slot->dev->driver->ops->remove == NULL))
+ return;
+
+ slot->dev->driver->ops->remove(slot->dev);
+}
+
+static void tpci200_uninstall(struct tpci200_board *tpci200)
+{
+ int i;
+
+ for (i = 0; i < TPCI200_NB_SLOT; i++)
+ tpci200_slot_remove(&tpci200->slots[i]);
+
+ tpci200_unregister(tpci200);
+ kfree(tpci200->slots);
+}
+
+struct ipack_bus_ops tpci200_bus_ops = {
+ .map_space = tpci200_slot_map_space,
+ .unmap_space = tpci200_slot_unmap_space,
+ .request_irq = tpci200_request_irq,
+ .free_irq = tpci200_free_irq,
+ .read8 = tpci200_read8,
+ .read16 = tpci200_read16,
+ .read32 = tpci200_read32,
+ .write8 = tpci200_write8,
+ .write16 = tpci200_write16,
+ .write32 = tpci200_write32,
+ .remove_device = tpci200_slot_unregister,
+};
+
+static int tpci200_install(struct tpci200_board *tpci200)
+{
+ int res;
+
+ tpci200->slots = kzalloc(
+ TPCI200_NB_SLOT * sizeof(struct tpci200_slot), GFP_KERNEL);
+ if (tpci200->slots == NULL) {
+ res = -ENOMEM;
+ goto out_err;
+ }
+
+ res = tpci200_register(tpci200);
+ if (res)
+ goto out_free;
+
+ mutex_init(&tpci200->mutex);
+ return 0;
+
+out_free:
+ kfree(tpci200->slots);
+ tpci200->slots = NULL;
+out_err:
+ return res;
+}
+
+static int tpci200_pciprobe(struct pci_dev *pdev,
+ const struct pci_device_id *id)
+{
+ int ret;
+ struct tpci200_board *tpci200;
+
+ tpci200 = kzalloc(sizeof(struct tpci200_board), GFP_KERNEL);
+ if (!tpci200)
+ return -ENOMEM;
+
+ tpci200->info = kzalloc(sizeof(struct tpci200_infos), GFP_KERNEL);
+ if (!tpci200->info) {
+ kfree(tpci200);
+ return -ENOMEM;
+ }
+
+ /* Save struct pci_dev pointer */
+ tpci200->info->pdev = pdev;
+ tpci200->info->id_table = (struct pci_device_id *)id;
+
+ /* register the device and initialize it */
+ ret = tpci200_install(tpci200);
+ if (ret) {
+ pr_err("Error during tpci200 install !\n");
+ kfree(tpci200->info);
+ kfree(tpci200);
+ return -ENODEV;
+ }
+
+ tpci200->info->drv.dev = &pdev->dev;
+ tpci200->info->drv.slots = TPCI200_NB_SLOT;
+
+ /* Register the bus in the industry pack driver */
+ ret = ipack_bus_register(&tpci200->info->drv);
+ if (ret < 0) {
+ pr_err("error registering the carrier on ipack driver\n");
+ tpci200_uninstall(tpci200);
+ kfree(tpci200->info);
+ kfree(tpci200);
+ return -EFAULT;
+ }
+ /* save the bus number given by ipack to logging purpose */
+ tpci200->number = tpci200->info->drv.bus_nr;
+ dev_set_drvdata(&pdev->dev, tpci200);
+ /* add the registered device in an internal linked list */
+ list_add_tail(&tpci200->list, &tpci200_list);
+ return ret;
+}
+
+static void __tpci200_pci_remove(struct tpci200_board *tpci200)
+{
+ tpci200_uninstall(tpci200);
+ tpci200_remove_sysfs_files(tpci200);
+ list_del(&tpci200->list);
+ ipack_bus_unregister(&tpci200->info->drv);
+ kfree(tpci200);
+}
+
+static void __devexit tpci200_pci_remove(struct pci_dev *dev)
+{
+ struct tpci200_board *tpci200, *next;
+
+ /* Search the registered device to uninstall it */
+ list_for_each_entry_safe(tpci200, next, &tpci200_list, list) {
+ if (tpci200->info->pdev == dev) {
+ __tpci200_pci_remove(tpci200);
+ break;
+ }
+ }
+}
+
+static struct pci_device_id tpci200_idtable[2] = {
+ { TPCI200_VENDOR_ID, TPCI200_DEVICE_ID, TPCI200_SUBVENDOR_ID,
+ TPCI200_SUBDEVICE_ID },
+ { 0, },
+};
+
+static struct pci_driver tpci200_pci_drv = {
+ .name = "tpci200",
+ .id_table = tpci200_idtable,
+ .probe = tpci200_pciprobe,
+ .remove = __devexit_p(tpci200_pci_remove),
+};
+
+static int __init tpci200_drvr_init_module(void)
+{
+ return pci_register_driver(&tpci200_pci_drv);
+}
+
+static void __exit tpci200_drvr_exit_module(void)
+{
+ struct tpci200_board *tpci200, *next;
+
+ list_for_each_entry_safe(tpci200, next, &tpci200_list, list)
+ __tpci200_pci_remove(tpci200);
+
+ pci_unregister_driver(&tpci200_pci_drv);
+}
+
+MODULE_DESCRIPTION("TEWS TPCI-200 device driver");
+MODULE_LICENSE("GPL");
+module_init(tpci200_drvr_init_module);
+module_exit(tpci200_drvr_exit_module);
projects / platform / kernel / linux-exynos.git / commitdiff