drivers/staging/comedi/drivers/icp_multi.h

   1 /*
   2     comedi/drivers/icp_multi.h
   3
   4     Stuff for ICP Multi
   5
   6     Author: Anne Smorthit <anne.smorthit@sfwte.ch>
   7
   8 */
   9
  10 #ifndef _ICP_MULTI_H_
  11 #define _ICP_MULTI_H_
  12
  13 #include "../comedidev.h"
  14 #include "comedi_pci.h"
  15
  16 /****************************************************************************/
  17
  18 struct pcilst_struct {
  19         struct pcilst_struct *next;
  20         int used;
  21         struct pci_dev *pcidev;
  22         unsigned short vendor;
  23         unsigned short device;
  24         unsigned char pci_bus;
  25         unsigned char pci_slot;
  26         unsigned char pci_func;
  27         resource_size_t io_addr[5];
  28         unsigned int irq;
  29 };
  30
  31 struct pcilst_struct *inova_devices;
  32 /* ptr to root list of all Inova devices */
  33
  34 /****************************************************************************/
  35
  36 static void pci_card_list_init(unsigned short pci_vendor, char display);
  37 static void pci_card_list_cleanup(unsigned short pci_vendor);
  38 static struct pcilst_struct *find_free_pci_card_by_device(unsigned short
  39                                                           vendor_id,
  40                                                           unsigned short
  41                                                           device_id);
  42 static int find_free_pci_card_by_position(unsigned short vendor_id,
  43                                           unsigned short device_id,
  44                                           unsigned short pci_bus,
  45                                           unsigned short pci_slot,
  46                                           struct pcilst_struct **card);
  47 static struct pcilst_struct *select_and_alloc_pci_card(unsigned short vendor_id,
  48                                                        unsigned short device_id,
  49                                                        unsigned short pci_bus,
  50                                                        unsigned short pci_slot);
  51
  52 static int pci_card_alloc(struct pcilst_struct *amcc);
  53 static int pci_card_free(struct pcilst_struct *amcc);
  54 static void pci_card_list_display(void);
  55 static int pci_card_data(struct pcilst_struct *amcc,
  56                          unsigned char *pci_bus, unsigned char *pci_slot,
  57                          unsigned char *pci_func, resource_size_t * io_addr,
  58                          unsigned int *irq);
  59
  60 /****************************************************************************/
  61
  62 /* build list of Inova cards in this system */
  63 static void pci_card_list_init(unsigned short pci_vendor, char display)
  64 {
  65         struct pci_dev *pcidev;
  66         struct pcilst_struct *inova, *last;
  67         int i;
  68
  69         inova_devices = NULL;
  70         last = NULL;
  71
  72         for (pcidev = pci_get_device(PCI_ANY_ID, PCI_ANY_ID, NULL);
  73              pcidev != NULL;
  74              pcidev = pci_get_device(PCI_ANY_ID, PCI_ANY_ID, pcidev)) {
  75                 if (pcidev->vendor == pci_vendor) {
  76                         inova = kzalloc(sizeof(*inova), GFP_KERNEL);
  77                         if (!inova) {
  78                                 printk
  79                                     ("icp_multi: pci_card_list_init: allocation failed\n");
  80                                 pci_dev_put(pcidev);
  81                                 break;
  82                         }
  83
  84                         inova->pcidev = pci_dev_get(pcidev);
  85                         if (last) {
  86                                 last->next = inova;
  87                         } else {
  88                                 inova_devices = inova;
  89                         }
  90                         last = inova;
  91
  92                         inova->vendor = pcidev->vendor;
  93                         inova->device = pcidev->device;
  94                         inova->pci_bus = pcidev->bus->number;
  95                         inova->pci_slot = PCI_SLOT(pcidev->devfn);
  96                         inova->pci_func = PCI_FUNC(pcidev->devfn);
  97                         /* Note: resources may be invalid if PCI device
  98                          * not enabled, but they are corrected in
  99                          * pci_card_alloc. */
 100                         for (i = 0; i < 5; i++)
 101                                 inova->io_addr[i] =
 102                                     pci_resource_start(pcidev, i);
 103                         inova->irq = pcidev->irq;
 104                 }
 105         }
 106
 107         if (display)
 108                 pci_card_list_display();
 109 }
 110
 111 /****************************************************************************/
 112 /* free up list of amcc cards in this system */
 113 static void pci_card_list_cleanup(unsigned short pci_vendor)
 114 {
 115         struct pcilst_struct *inova, *next;
 116
 117         for (inova = inova_devices; inova; inova = next) {
 118                 next = inova->next;
 119                 pci_dev_put(inova->pcidev);
 120                 kfree(inova);
 121         }
 122
 123         inova_devices = NULL;
 124 }
 125
 126 /****************************************************************************/
 127 /* find first unused card with this device_id */
 128 static struct pcilst_struct *find_free_pci_card_by_device(unsigned short
 129                                                           vendor_id,
 130                                                           unsigned short
 131                                                           device_id)
 132 {
 133         struct pcilst_struct *inova, *next;
 134
 135         for (inova = inova_devices; inova; inova = next) {
 136                 next = inova->next;
 137                 if ((!inova->used) && (inova->device == device_id)
 138                     && (inova->vendor == vendor_id))
 139                         return inova;
 140
 141         }
 142
 143         return NULL;
 144 }
 145
 146 /****************************************************************************/
 147 /* find card on requested position */
 148 static int find_free_pci_card_by_position(unsigned short vendor_id,
 149                                           unsigned short device_id,
 150                                           unsigned short pci_bus,
 151                                           unsigned short pci_slot,
 152                                           struct pcilst_struct **card)
 153 {
 154         struct pcilst_struct *inova, *next;
 155
 156         *card = NULL;
 157         for (inova = inova_devices; inova; inova = next) {
 158                 next = inova->next;
 159                 if ((inova->vendor == vendor_id) && (inova->device == device_id)
 160                     && (inova->pci_bus == pci_bus)
 161                     && (inova->pci_slot == pci_slot)) {
 162                         if (!(inova->used)) {
 163                                 *card = inova;
 164                                 return 0;       /* ok, card is found */
 165                         } else {
 166                                 return 2;       /* card exist but is used */
 167                         }
 168                 }
 169         }
 170
 171         return 1;               /* no card found */
 172 }
 173
 174 /****************************************************************************/
 175 /* mark card as used */
 176 static int pci_card_alloc(struct pcilst_struct *inova)
 177 {
 178         int i;
 179
 180         if (!inova) {
 181                 printk(" - BUG!! inova is NULL!\n");
 182                 return -1;
 183         }
 184
 185         if (inova->used)
 186                 return 1;
 187         if (comedi_pci_enable(inova->pcidev, "icp_multi")) {
 188                 printk(" - Can't enable PCI device and request regions!\n");
 189                 return -1;
 190         }
 191         /* Resources will be accurate now. */
 192         for (i = 0; i < 5; i++)
 193                 inova->io_addr[i] = pci_resource_start(inova->pcidev, i);
 194         inova->irq = inova->pcidev->irq;
 195         inova->used = 1;
 196         return 0;
 197 }
 198
 199 /****************************************************************************/
 200 /* mark card as free */
 201 static int pci_card_free(struct pcilst_struct *inova)
 202 {
 203         if (!inova)
 204                 return -1;
 205
 206         if (!inova->used)
 207                 return 1;
 208         inova->used = 0;
 209         comedi_pci_disable(inova->pcidev);
 210         return 0;
 211 }
 212
 213 /****************************************************************************/
 214 /* display list of found cards */
 215 static void pci_card_list_display(void)
 216 {
 217         struct pcilst_struct *inova, *next;
 218
 219         printk("Anne's List of pci cards\n");
 220         printk("bus:slot:func vendor device io_inova io_daq irq used\n");
 221
 222         for (inova = inova_devices; inova; inova = next) {
 223                 next = inova->next;
 224                 printk
 225                     ("%2d   %2d   %2d  0x%4x 0x%4x   0x%8llx 0x%8llx  %2u  %2d\n",
 226                      inova->pci_bus, inova->pci_slot, inova->pci_func,
 227                      inova->vendor, inova->device,
 228                      (unsigned long long)inova->io_addr[0],
 229                      (unsigned long long)inova->io_addr[2], inova->irq,
 230                      inova->used);
 231
 232         }
 233 }
 234
 235 /****************************************************************************/
 236 /* return all card information for driver */
 237 static int pci_card_data(struct pcilst_struct *inova,
 238                          unsigned char *pci_bus, unsigned char *pci_slot,
 239                          unsigned char *pci_func, resource_size_t * io_addr,
 240                          unsigned int *irq)
 241 {
 242         int i;
 243
 244         if (!inova)
 245                 return -1;
 246         *pci_bus = inova->pci_bus;
 247         *pci_slot = inova->pci_slot;
 248         *pci_func = inova->pci_func;
 249         for (i = 0; i < 5; i++)
 250                 io_addr[i] = inova->io_addr[i];
 251         *irq = inova->irq;
 252         return 0;
 253 }
 254
 255 /****************************************************************************/
 256 /* select and alloc card */
 257 static struct pcilst_struct *select_and_alloc_pci_card(unsigned short vendor_id,
 258                                                        unsigned short device_id,
 259                                                        unsigned short pci_bus,
 260                                                        unsigned short pci_slot)
 261 {
 262         struct pcilst_struct *card;
 263         int err;
 264
 265         if ((pci_bus < 1) & (pci_slot < 1)) {   /* use autodetection */
 266
 267                 card = find_free_pci_card_by_device(vendor_id, device_id);
 268                 if (card == NULL) {
 269                         printk(" - Unused card not found in system!\n");
 270                         return NULL;
 271                 }
 272         } else {
 273                 switch (find_free_pci_card_by_position(vendor_id, device_id,
 274                                                        pci_bus, pci_slot,
 275                                                        &card)) {
 276                 case 1:
 277                         printk
 278                             (" - Card not found on requested position b:s %d:%d!\n",
 279                              pci_bus, pci_slot);
 280                         return NULL;
 281                 case 2:
 282                         printk
 283                             (" - Card on requested position is used b:s %d:%d!\n",
 284                              pci_bus, pci_slot);
 285                         return NULL;
 286                 }
 287         }
 288
 289         err = pci_card_alloc(card);
 290         if (err != 0) {
 291                 if (err > 0)
 292                         printk(" - Can't allocate card!\n");
 293                 /* else: error already printed. */
 294                 return NULL;
 295         }
 296
 297         return card;
 298 }
 299
 300 #endif