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