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|
/**
* 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; version 2 of the License.
*/
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
#include <linux/module.h>
#include "tpci200.h"
static 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 __iomem *address,
unsigned long offset)
{
return ioread8(address + (offset^1));
}
static inline unsigned short __tpci200_read16(void __iomem *address,
unsigned long offset)
{
return ioread16(address + offset);
}
static inline unsigned int __tpci200_read32(void __iomem *address,
unsigned long offset)
{
return swahw32(ioread32(address + offset));
}
static inline void __tpci200_write8(unsigned char value,
void __iomem *address, unsigned long offset)
{
iowrite8(value, address+(offset^1));
}
static inline void __tpci200_write16(unsigned short value,
void __iomem *address,
unsigned long offset)
{
iowrite16(value, address+offset);
}
static inline void __tpci200_write32(unsigned int value,
void __iomem *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((void __iomem *) (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((void __iomem *)
(tpci200->slots[i].dev->io_space.address +
0xC0));
readw((void __iomem *)
(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(
(void __iomem *)(tpci200->info->interface_regs +
control_reg[i]));
reg_value &=
~(TPCI200_INT0_EN | TPCI200_INT1_EN);
writew(reg_value,
(void __iomem *)(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;
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);
return NULL;
}
if (mutex_lock_interruptible(&tpci200->mutex))
return NULL;
if (tpci200->slots[slot_position].dev != NULL) {
pr_err("Slot [%s %d:%d] already installed !\n",
TPCI200_SHORTNAME, tpci200_number, slot_position);
goto err_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 err_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)
goto err_unregister;
mutex_unlock(&tpci200->mutex);
return dev;
err_unregister:
tpci200_slot_unregister(dev);
kfree(dev);
err_unlock:
mutex_unlock(&tpci200->mutex);
return NULL;
}
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 __iomem *)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 __iomem *)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 __iomem *)mem_base + TPCI200_MEM8_GAP*i;
tpci200->slots[i].mem_phys.size = TPCI200_MEM8_SIZE;
writew(slot_ctrl,
(void __iomem *)(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, (void __iomem *)(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,
(void __iomem *)(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);
tpci200->slots[dev->slot].dev = NULL;
kfree(dev);
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 __iomem *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);
}
static 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);
|