4 * driver for the TEWS TPCI-200 device
6 * Copyright (C) 2009-2012 CERN (www.cern.ch)
7 * Author: Nicolas Serafini, EIC2 SA
8 * Author: Samuel Iglesias Gonsalvez <siglesias@igalia.com>
10 * This program is free software; you can redistribute it and/or modify it
11 * under the terms of the GNU General Public License as published by the Free
12 * Software Foundation; version 2 of the License.
15 #include <linux/module.h>
16 #include <linux/slab.h>
19 static const u16 tpci200_status_timeout[] = {
26 static const u16 tpci200_status_error[] = {
33 static const size_t tpci200_space_size[IPACK_SPACE_COUNT] = {
34 [IPACK_IO_SPACE] = TPCI200_IO_SPACE_SIZE,
35 [IPACK_ID_SPACE] = TPCI200_ID_SPACE_SIZE,
36 [IPACK_INT_SPACE] = TPCI200_INT_SPACE_SIZE,
37 [IPACK_MEM8_SPACE] = TPCI200_MEM8_SPACE_SIZE,
38 [IPACK_MEM16_SPACE] = TPCI200_MEM16_SPACE_SIZE,
41 static const size_t tpci200_space_interval[IPACK_SPACE_COUNT] = {
42 [IPACK_IO_SPACE] = TPCI200_IO_SPACE_INTERVAL,
43 [IPACK_ID_SPACE] = TPCI200_ID_SPACE_INTERVAL,
44 [IPACK_INT_SPACE] = TPCI200_INT_SPACE_INTERVAL,
45 [IPACK_MEM8_SPACE] = TPCI200_MEM8_SPACE_INTERVAL,
46 [IPACK_MEM16_SPACE] = TPCI200_MEM16_SPACE_INTERVAL,
49 static struct tpci200_board *check_slot(struct ipack_device *dev)
51 struct tpci200_board *tpci200;
57 tpci200 = dev_get_drvdata(dev->bus->parent);
59 if (tpci200 == NULL) {
60 dev_info(&dev->dev, "carrier board not found\n");
64 if (dev->slot >= TPCI200_NB_SLOT) {
66 "Slot [%d:%d] doesn't exist! Last tpci200 slot is %d.\n",
67 dev->bus->bus_nr, dev->slot, TPCI200_NB_SLOT-1);
74 static void tpci200_clear_mask(struct tpci200_board *tpci200,
75 __le16 __iomem *addr, u16 mask)
78 spin_lock_irqsave(&tpci200->regs_lock, flags);
79 iowrite16(ioread16(addr) & (~mask), addr);
80 spin_unlock_irqrestore(&tpci200->regs_lock, flags);
83 static void tpci200_set_mask(struct tpci200_board *tpci200,
84 __le16 __iomem *addr, u16 mask)
87 spin_lock_irqsave(&tpci200->regs_lock, flags);
88 iowrite16(ioread16(addr) | mask, addr);
89 spin_unlock_irqrestore(&tpci200->regs_lock, flags);
92 static void tpci200_unregister(struct tpci200_board *tpci200)
94 free_irq(tpci200->info->pdev->irq, (void *) tpci200);
96 pci_iounmap(tpci200->info->pdev, tpci200->info->interface_regs);
97 pci_iounmap(tpci200->info->pdev, tpci200->info->cfg_regs);
99 pci_release_region(tpci200->info->pdev, TPCI200_IP_INTERFACE_BAR);
100 pci_release_region(tpci200->info->pdev, TPCI200_IO_ID_INT_SPACES_BAR);
101 pci_release_region(tpci200->info->pdev, TPCI200_MEM16_SPACE_BAR);
102 pci_release_region(tpci200->info->pdev, TPCI200_MEM8_SPACE_BAR);
103 pci_release_region(tpci200->info->pdev, TPCI200_CFG_MEM_BAR);
105 pci_disable_device(tpci200->info->pdev);
106 pci_dev_put(tpci200->info->pdev);
109 static void tpci200_enable_irq(struct tpci200_board *tpci200,
112 tpci200_set_mask(tpci200,
113 &tpci200->info->interface_regs->control[islot],
114 TPCI200_INT0_EN | TPCI200_INT1_EN);
117 static void tpci200_disable_irq(struct tpci200_board *tpci200,
120 tpci200_clear_mask(tpci200,
121 &tpci200->info->interface_regs->control[islot],
122 TPCI200_INT0_EN | TPCI200_INT1_EN);
125 static irqreturn_t tpci200_slot_irq(struct slot_irq *slot_irq)
131 ret = slot_irq->handler(slot_irq->arg);
136 static irqreturn_t tpci200_interrupt(int irq, void *dev_id)
138 struct tpci200_board *tpci200 = (struct tpci200_board *) dev_id;
139 struct slot_irq *slot_irq;
144 /* Read status register */
145 status_reg = ioread16(&tpci200->info->interface_regs->status);
147 /* Did we cause the interrupt? */
148 if (!(status_reg & TPCI200_SLOT_INT_MASK))
151 /* callback to the IRQ handler for the corresponding slot */
153 for (i = 0; i < TPCI200_NB_SLOT; i++) {
154 if (!(status_reg & ((TPCI200_A_INT0 | TPCI200_A_INT1) << (2 * i))))
156 slot_irq = rcu_dereference(tpci200->slots[i].irq);
157 ret = tpci200_slot_irq(slot_irq);
158 if (ret == -ENODEV) {
159 dev_info(&tpci200->info->pdev->dev,
160 "No registered ISR for slot [%d:%d]!. IRQ will be disabled.\n",
162 tpci200_disable_irq(tpci200, i);
170 static int tpci200_free_irq(struct ipack_device *dev)
172 struct slot_irq *slot_irq;
173 struct tpci200_board *tpci200;
175 tpci200 = check_slot(dev);
179 if (mutex_lock_interruptible(&tpci200->mutex))
182 if (tpci200->slots[dev->slot].irq == NULL) {
183 mutex_unlock(&tpci200->mutex);
187 tpci200_disable_irq(tpci200, dev->slot);
188 slot_irq = tpci200->slots[dev->slot].irq;
189 /* uninstall handler */
190 RCU_INIT_POINTER(tpci200->slots[dev->slot].irq, NULL);
193 mutex_unlock(&tpci200->mutex);
197 static int tpci200_request_irq(struct ipack_device *dev,
198 irqreturn_t (*handler)(void *), void *arg)
201 struct slot_irq *slot_irq;
202 struct tpci200_board *tpci200;
204 tpci200 = check_slot(dev);
208 if (mutex_lock_interruptible(&tpci200->mutex))
211 if (tpci200->slots[dev->slot].irq != NULL) {
213 "Slot [%d:%d] IRQ already registered !\n",
220 slot_irq = kzalloc(sizeof(struct slot_irq), GFP_KERNEL);
221 if (slot_irq == NULL) {
223 "Slot [%d:%d] unable to allocate memory for IRQ !\n",
224 dev->bus->bus_nr, dev->slot);
230 * WARNING: Setup Interrupt Vector in the IndustryPack device
231 * before an IRQ request.
232 * Read the User Manual of your IndustryPack device to know
233 * where to write the vector in memory.
235 slot_irq->handler = handler;
237 slot_irq->holder = dev;
239 rcu_assign_pointer(tpci200->slots[dev->slot].irq, slot_irq);
240 tpci200_enable_irq(tpci200, dev->slot);
243 mutex_unlock(&tpci200->mutex);
247 static int tpci200_register(struct tpci200_board *tpci200)
251 phys_addr_t ioidint_base;
252 unsigned short slot_ctrl;
254 if (pci_enable_device(tpci200->info->pdev) < 0)
257 /* Request IP interface register (Bar 2) */
258 res = pci_request_region(tpci200->info->pdev, TPCI200_IP_INTERFACE_BAR,
259 "Carrier IP interface registers");
261 dev_err(&tpci200->info->pdev->dev,
262 "(bn 0x%X, sn 0x%X) failed to allocate PCI resource for BAR 2 !",
263 tpci200->info->pdev->bus->number,
264 tpci200->info->pdev->devfn);
265 goto out_disable_pci;
268 /* Request IO ID INT space (Bar 3) */
269 res = pci_request_region(tpci200->info->pdev,
270 TPCI200_IO_ID_INT_SPACES_BAR,
271 "Carrier IO ID INT space");
273 dev_err(&tpci200->info->pdev->dev,
274 "(bn 0x%X, sn 0x%X) failed to allocate PCI resource for BAR 3 !",
275 tpci200->info->pdev->bus->number,
276 tpci200->info->pdev->devfn);
277 goto out_release_ip_space;
280 /* Request MEM8 space (Bar 5) */
281 res = pci_request_region(tpci200->info->pdev, TPCI200_MEM8_SPACE_BAR,
282 "Carrier MEM8 space");
284 dev_err(&tpci200->info->pdev->dev,
285 "(bn 0x%X, sn 0x%X) failed to allocate PCI resource for BAR 5!",
286 tpci200->info->pdev->bus->number,
287 tpci200->info->pdev->devfn);
288 goto out_release_ioid_int_space;
291 /* Request MEM16 space (Bar 4) */
292 res = pci_request_region(tpci200->info->pdev, TPCI200_MEM16_SPACE_BAR,
293 "Carrier MEM16 space");
295 dev_err(&tpci200->info->pdev->dev,
296 "(bn 0x%X, sn 0x%X) failed to allocate PCI resource for BAR 4!",
297 tpci200->info->pdev->bus->number,
298 tpci200->info->pdev->devfn);
299 goto out_release_mem8_space;
302 /* Map internal tpci200 driver user space */
303 tpci200->info->interface_regs =
304 ioremap_nocache(pci_resource_start(tpci200->info->pdev,
305 TPCI200_IP_INTERFACE_BAR),
308 /* Initialize lock that protects interface_regs */
309 spin_lock_init(&tpci200->regs_lock);
311 ioidint_base = pci_resource_start(tpci200->info->pdev,
312 TPCI200_IO_ID_INT_SPACES_BAR);
313 tpci200->mod_mem[IPACK_IO_SPACE] = ioidint_base + TPCI200_IO_SPACE_OFF;
314 tpci200->mod_mem[IPACK_ID_SPACE] = ioidint_base + TPCI200_ID_SPACE_OFF;
315 tpci200->mod_mem[IPACK_INT_SPACE] =
316 ioidint_base + TPCI200_INT_SPACE_OFF;
317 tpci200->mod_mem[IPACK_MEM8_SPACE] =
318 pci_resource_start(tpci200->info->pdev,
319 TPCI200_MEM8_SPACE_BAR);
320 tpci200->mod_mem[IPACK_MEM16_SPACE] =
321 pci_resource_start(tpci200->info->pdev,
322 TPCI200_MEM16_SPACE_BAR);
324 /* Set the default parameters of the slot
325 * INT0 disabled, level sensitive
326 * INT1 disabled, level sensitive
327 * error interrupt disabled
328 * timeout interrupt disabled
329 * recover time disabled
333 for (i = 0; i < TPCI200_NB_SLOT; i++)
334 writew(slot_ctrl, &tpci200->info->interface_regs->control[i]);
336 res = request_irq(tpci200->info->pdev->irq,
337 tpci200_interrupt, IRQF_SHARED,
338 KBUILD_MODNAME, (void *) tpci200);
340 dev_err(&tpci200->info->pdev->dev,
341 "(bn 0x%X, sn 0x%X) unable to register IRQ !",
342 tpci200->info->pdev->bus->number,
343 tpci200->info->pdev->devfn);
344 goto out_release_ioid_int_space;
349 out_release_mem8_space:
350 pci_release_region(tpci200->info->pdev, TPCI200_MEM8_SPACE_BAR);
351 out_release_ioid_int_space:
352 pci_release_region(tpci200->info->pdev, TPCI200_IO_ID_INT_SPACES_BAR);
353 out_release_ip_space:
354 pci_release_region(tpci200->info->pdev, TPCI200_IP_INTERFACE_BAR);
356 pci_disable_device(tpci200->info->pdev);
360 static int tpci200_get_clockrate(struct ipack_device *dev)
362 struct tpci200_board *tpci200 = check_slot(dev);
363 __le16 __iomem *addr;
368 addr = &tpci200->info->interface_regs->control[dev->slot];
369 return (ioread16(addr) & TPCI200_CLK32) ? 32 : 8;
372 static int tpci200_set_clockrate(struct ipack_device *dev, int mherz)
374 struct tpci200_board *tpci200 = check_slot(dev);
375 __le16 __iomem *addr;
380 addr = &tpci200->info->interface_regs->control[dev->slot];
384 tpci200_clear_mask(tpci200, addr, TPCI200_CLK32);
387 tpci200_set_mask(tpci200, addr, TPCI200_CLK32);
395 static int tpci200_get_error(struct ipack_device *dev)
397 struct tpci200_board *tpci200 = check_slot(dev);
398 __le16 __iomem *addr;
404 addr = &tpci200->info->interface_regs->status;
405 mask = tpci200_status_error[dev->slot];
406 return (ioread16(addr) & mask) ? 1 : 0;
409 static int tpci200_get_timeout(struct ipack_device *dev)
411 struct tpci200_board *tpci200 = check_slot(dev);
412 __le16 __iomem *addr;
418 addr = &tpci200->info->interface_regs->status;
419 mask = tpci200_status_timeout[dev->slot];
421 return (ioread16(addr) & mask) ? 1 : 0;
424 static int tpci200_reset_timeout(struct ipack_device *dev)
426 struct tpci200_board *tpci200 = check_slot(dev);
427 __le16 __iomem *addr;
433 addr = &tpci200->info->interface_regs->status;
434 mask = tpci200_status_timeout[dev->slot];
436 iowrite16(mask, addr);
440 static void tpci200_uninstall(struct tpci200_board *tpci200)
442 tpci200_unregister(tpci200);
443 kfree(tpci200->slots);
446 static const struct ipack_bus_ops tpci200_bus_ops = {
447 .request_irq = tpci200_request_irq,
448 .free_irq = tpci200_free_irq,
449 .get_clockrate = tpci200_get_clockrate,
450 .set_clockrate = tpci200_set_clockrate,
451 .get_error = tpci200_get_error,
452 .get_timeout = tpci200_get_timeout,
453 .reset_timeout = tpci200_reset_timeout,
456 static int tpci200_install(struct tpci200_board *tpci200)
460 tpci200->slots = kzalloc(
461 TPCI200_NB_SLOT * sizeof(struct tpci200_slot), GFP_KERNEL);
462 if (tpci200->slots == NULL)
465 res = tpci200_register(tpci200);
467 kfree(tpci200->slots);
468 tpci200->slots = NULL;
472 mutex_init(&tpci200->mutex);
476 static void tpci200_release_device(struct ipack_device *dev)
481 static int tpci200_create_device(struct tpci200_board *tpci200, int i)
484 enum ipack_space space;
485 struct ipack_device *dev =
486 kzalloc(sizeof(struct ipack_device), GFP_KERNEL);
490 dev->bus = tpci200->info->ipack_bus;
491 dev->release = tpci200_release_device;
493 for (space = 0; space < IPACK_SPACE_COUNT; space++) {
494 dev->region[space].start =
495 tpci200->mod_mem[space]
496 + tpci200_space_interval[space] * i;
497 dev->region[space].size = tpci200_space_size[space];
500 ret = ipack_device_init(dev);
502 ipack_put_device(dev);
506 ret = ipack_device_add(dev);
508 ipack_put_device(dev);
513 static int tpci200_pci_probe(struct pci_dev *pdev,
514 const struct pci_device_id *id)
517 struct tpci200_board *tpci200;
520 tpci200 = kzalloc(sizeof(struct tpci200_board), GFP_KERNEL);
524 tpci200->info = kzalloc(sizeof(struct tpci200_infos), GFP_KERNEL);
525 if (!tpci200->info) {
532 /* Obtain a mapping of the carrier's PCI configuration registers */
533 ret = pci_request_region(pdev, TPCI200_CFG_MEM_BAR,
534 KBUILD_MODNAME " Configuration Memory");
536 dev_err(&pdev->dev, "Failed to allocate PCI Configuration Memory");
538 goto out_err_pci_request;
540 tpci200->info->cfg_regs = ioremap_nocache(
541 pci_resource_start(pdev, TPCI200_CFG_MEM_BAR),
542 pci_resource_len(pdev, TPCI200_CFG_MEM_BAR));
543 if (!tpci200->info->cfg_regs) {
544 dev_err(&pdev->dev, "Failed to map PCI Configuration Memory");
546 goto out_err_ioremap;
549 /* Disable byte swapping for 16 bit IP module access. This will ensure
550 * that the Industrypack big endian byte order is preserved by the
552 reg32 = ioread32(tpci200->info->cfg_regs + LAS1_DESC);
553 reg32 |= 1 << LAS_BIT_BIGENDIAN;
554 iowrite32(reg32, tpci200->info->cfg_regs + LAS1_DESC);
556 reg32 = ioread32(tpci200->info->cfg_regs + LAS2_DESC);
557 reg32 |= 1 << LAS_BIT_BIGENDIAN;
558 iowrite32(reg32, tpci200->info->cfg_regs + LAS2_DESC);
560 /* Save struct pci_dev pointer */
561 tpci200->info->pdev = pdev;
562 tpci200->info->id_table = (struct pci_device_id *)id;
564 /* register the device and initialize it */
565 ret = tpci200_install(tpci200);
567 dev_err(&pdev->dev, "error during tpci200 install\n");
569 goto out_err_install;
572 /* Register the carrier in the industry pack bus driver */
573 tpci200->info->ipack_bus = ipack_bus_register(&pdev->dev,
576 if (!tpci200->info->ipack_bus) {
578 "error registering the carrier on ipack driver\n");
580 goto out_err_bus_register;
583 /* save the bus number given by ipack to logging purpose */
584 tpci200->number = tpci200->info->ipack_bus->bus_nr;
585 dev_set_drvdata(&pdev->dev, tpci200);
587 for (i = 0; i < TPCI200_NB_SLOT; i++)
588 tpci200_create_device(tpci200, i);
591 out_err_bus_register:
592 tpci200_uninstall(tpci200);
594 iounmap(tpci200->info->cfg_regs);
596 pci_release_region(pdev, TPCI200_CFG_MEM_BAR);
599 kfree(tpci200->info);
605 static void __tpci200_pci_remove(struct tpci200_board *tpci200)
607 ipack_bus_unregister(tpci200->info->ipack_bus);
608 tpci200_uninstall(tpci200);
610 kfree(tpci200->info);
614 static void tpci200_pci_remove(struct pci_dev *dev)
616 struct tpci200_board *tpci200 = pci_get_drvdata(dev);
618 __tpci200_pci_remove(tpci200);
621 static DEFINE_PCI_DEVICE_TABLE(tpci200_idtable) = {
622 { TPCI200_VENDOR_ID, TPCI200_DEVICE_ID, TPCI200_SUBVENDOR_ID,
623 TPCI200_SUBDEVICE_ID },
627 MODULE_DEVICE_TABLE(pci, tpci200_idtable);
629 static struct pci_driver tpci200_pci_drv = {
631 .id_table = tpci200_idtable,
632 .probe = tpci200_pci_probe,
633 .remove = tpci200_pci_remove,
636 module_pci_driver(tpci200_pci_drv);
638 MODULE_DESCRIPTION("TEWS TPCI-200 device driver");
639 MODULE_LICENSE("GPL");