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comedi/drivers/icp_multi.h
Stuff for ICP Multi
Author: Anne Smorthit <anne.smorthit@sfwte.ch>
*/
#ifndef _ICP_MULTI_H_
#define _ICP_MULTI_H_
#include "../comedidev.h"
#include "comedi_pci.h"
/****************************************************************************/
struct pcilst_struct {
struct pcilst_struct *next;
int used;
struct pci_dev *pcidev;
unsigned short vendor;
unsigned short device;
unsigned char pci_bus;
unsigned char pci_slot;
unsigned char pci_func;
resource_size_t io_addr[5];
unsigned int irq;
};
struct pcilst_struct *inova_devices; // ptr to root list of all Inova devices
/****************************************************************************/
static void pci_card_list_init(unsigned short pci_vendor, char display);
static void pci_card_list_cleanup(unsigned short pci_vendor);
static struct pcilst_struct *find_free_pci_card_by_device(unsigned short
vendor_id, unsigned short device_id);
static int find_free_pci_card_by_position(unsigned short vendor_id,
unsigned short device_id, unsigned short pci_bus,
unsigned short pci_slot, struct pcilst_struct **card);
static struct pcilst_struct *select_and_alloc_pci_card(unsigned short vendor_id,
unsigned short device_id, unsigned short pci_bus,
unsigned short pci_slot);
static int pci_card_alloc(struct pcilst_struct *amcc);
static int pci_card_free(struct pcilst_struct *amcc);
static void pci_card_list_display(void);
static int pci_card_data(struct pcilst_struct *amcc,
unsigned char *pci_bus, unsigned char *pci_slot,
unsigned char *pci_func, resource_size_t * io_addr, unsigned int *irq);
/****************************************************************************/
/* build list of Inova cards in this system */
static void pci_card_list_init(unsigned short pci_vendor, char display)
{
struct pci_dev *pcidev;
struct pcilst_struct *inova, *last;
int i;
inova_devices = NULL;
last = NULL;
for (pcidev = pci_get_device(PCI_ANY_ID, PCI_ANY_ID, NULL);
pcidev != NULL;
pcidev = pci_get_device(PCI_ANY_ID, PCI_ANY_ID, pcidev)) {
if (pcidev->vendor == pci_vendor) {
inova = kmalloc(sizeof(*inova), GFP_KERNEL);
if (!inova) {
printk("icp_multi: pci_card_list_init: allocation failed\n");
pci_dev_put(pcidev);
break;
}
memset(inova, 0, sizeof(*inova));
inova->pcidev = pci_dev_get(pcidev);
if (last) {
last->next = inova;
} else {
inova_devices = inova;
}
last = inova;
inova->vendor = pcidev->vendor;
inova->device = pcidev->device;
inova->pci_bus = pcidev->bus->number;
inova->pci_slot = PCI_SLOT(pcidev->devfn);
inova->pci_func = PCI_FUNC(pcidev->devfn);
/* Note: resources may be invalid if PCI device
* not enabled, but they are corrected in
* pci_card_alloc. */
for (i = 0; i < 5; i++)
inova->io_addr[i] =
pci_resource_start(pcidev, i);
inova->irq = pcidev->irq;
}
}
if (display)
pci_card_list_display();
}
/****************************************************************************/
/* free up list of amcc cards in this system */
static void pci_card_list_cleanup(unsigned short pci_vendor)
{
struct pcilst_struct *inova, *next;
for (inova = inova_devices; inova; inova = next) {
next = inova->next;
pci_dev_put(inova->pcidev);
kfree(inova);
}
inova_devices = NULL;
}
/****************************************************************************/
/* find first unused card with this device_id */
static struct pcilst_struct *find_free_pci_card_by_device(unsigned short
vendor_id, unsigned short device_id)
{
struct pcilst_struct *inova, *next;
for (inova = inova_devices; inova; inova = next) {
next = inova->next;
if ((!inova->used) && (inova->device == device_id)
&& (inova->vendor == vendor_id))
return inova;
}
return NULL;
}
/****************************************************************************/
/* find card on requested position */
static int find_free_pci_card_by_position(unsigned short vendor_id,
unsigned short device_id, unsigned short pci_bus,
unsigned short pci_slot, struct pcilst_struct **card)
{
struct pcilst_struct *inova, *next;
*card = NULL;
for (inova = inova_devices; inova; inova = next) {
next = inova->next;
if ((inova->vendor == vendor_id) && (inova->device == device_id)
&& (inova->pci_bus == pci_bus)
&& (inova->pci_slot == pci_slot)) {
if (!(inova->used)) {
*card = inova;
return 0; // ok, card is found
} else {
return 2; // card exist but is used
}
}
}
return 1; // no card found
}
/****************************************************************************/
/* mark card as used */
static int pci_card_alloc(struct pcilst_struct *inova)
{
int i;
if (!inova) {
rt_printk(" - BUG!! inova is NULL!\n");
return -1;
}
if (inova->used)
return 1;
if (comedi_pci_enable(inova->pcidev, "icp_multi")) {
rt_printk(" - Can't enable PCI device and request regions!\n");
return -1;
}
/* Resources will be accurate now. */
for (i = 0; i < 5; i++)
inova->io_addr[i] = pci_resource_start(inova->pcidev, i);
inova->irq = inova->pcidev->irq;
inova->used = 1;
return 0;
}
/****************************************************************************/
/* mark card as free */
static int pci_card_free(struct pcilst_struct *inova)
{
if (!inova)
return -1;
if (!inova->used)
return 1;
inova->used = 0;
comedi_pci_disable(inova->pcidev);
return 0;
}
/****************************************************************************/
/* display list of found cards */
static void pci_card_list_display(void)
{
struct pcilst_struct *inova, *next;
printk("Anne's List of pci cards\n");
printk("bus:slot:func vendor device io_inova io_daq irq used\n");
for (inova = inova_devices; inova; inova = next) {
next = inova->next;
printk("%2d %2d %2d 0x%4x 0x%4x 0x%8llx 0x%8llx %2u %2d\n", inova->pci_bus, inova->pci_slot, inova->pci_func, inova->vendor, inova->device, (unsigned long long)inova->io_addr[0], (unsigned long long)inova->io_addr[2], inova->irq, inova->used);
}
}
/****************************************************************************/
/* return all card information for driver */
static int pci_card_data(struct pcilst_struct *inova,
unsigned char *pci_bus, unsigned char *pci_slot,
unsigned char *pci_func, resource_size_t * io_addr, unsigned int *irq)
{
int i;
if (!inova)
return -1;
*pci_bus = inova->pci_bus;
*pci_slot = inova->pci_slot;
*pci_func = inova->pci_func;
for (i = 0; i < 5; i++)
io_addr[i] = inova->io_addr[i];
*irq = inova->irq;
return 0;
}
/****************************************************************************/
/* select and alloc card */
static struct pcilst_struct *select_and_alloc_pci_card(unsigned short vendor_id,
unsigned short device_id, unsigned short pci_bus,
unsigned short pci_slot)
{
struct pcilst_struct *card;
int err;
if ((pci_bus < 1) & (pci_slot < 1)) { // use autodetection
if ((card = find_free_pci_card_by_device(vendor_id,
device_id)) == NULL) {
rt_printk(" - Unused card not found in system!\n");
return NULL;
}
} else {
switch (find_free_pci_card_by_position(vendor_id, device_id,
pci_bus, pci_slot, &card)) {
case 1:
rt_printk
(" - Card not found on requested position b:s %d:%d!\n",
pci_bus, pci_slot);
return NULL;
case 2:
rt_printk
(" - Card on requested position is used b:s %d:%d!\n",
pci_bus, pci_slot);
return NULL;
}
}
if ((err = pci_card_alloc(card)) != 0) {
if (err > 0)
rt_printk(" - Can't allocate card!\n");
/* else: error already printed. */
return NULL;
}
return card;
}
#endif
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