diff options
Diffstat (limited to 'drivers/staging/comedi/drivers/icp_multi.h')
| -rw-r--r-- | drivers/staging/comedi/drivers/icp_multi.h | 278 |
1 files changed, 278 insertions, 0 deletions
diff --git a/drivers/staging/comedi/drivers/icp_multi.h b/drivers/staging/comedi/drivers/icp_multi.h new file mode 100644 index 000000000000..6df4a8d15ff2 --- /dev/null +++ b/drivers/staging/comedi/drivers/icp_multi.h @@ -0,0 +1,278 @@ +/* + 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 |