icp_multi.h revision 7a6cb0d5497418599d2125b670926b75e673861c 
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
18struct 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
31struct pcilst_struct *inova_devices;
32/* ptr to root list of all Inova devices */
33
34/****************************************************************************/
35
36static void pci_card_list_init(unsigned short pci_vendor, char display);
37static void pci_card_list_cleanup(unsigned short pci_vendor);
38static struct pcilst_struct *find_free_pci_card_by_device(unsigned short
39							  vendor_id,
40							  unsigned short
41							  device_id);
42static 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);
47static 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
52static int pci_card_alloc(struct pcilst_struct *amcc);
53static int pci_card_free(struct pcilst_struct *amcc);
54static void pci_card_list_display(void);
55static 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 */
63static 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 */
113static 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 */
128static 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 */
148static 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 */
176static 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 */
201static 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 */
215static 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 */
237static 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 */
257static 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
301