2 * Copyright (C) 2006, 2007 Eugene Konev <ejka@openwrt.org>
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License as published by
6 * the Free Software Foundation; either version 2 of the License, or
7 * (at your option) any later version.
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write to the Free Software
16 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
19 #include <linux/init.h>
20 #include <linux/types.h>
21 #include <linux/kernel.h>
22 #include <linux/string.h>
23 #include <linux/device.h>
24 #include <linux/module.h>
25 #include <linux/errno.h>
26 #include <linux/platform_device.h>
27 #include <linux/interrupt.h>
28 #include <linux/device.h>
31 #include <linux/vlynq.h>
33 #define VLYNQ_CTRL_PM_ENABLE 0x80000000
34 #define VLYNQ_CTRL_CLOCK_INT 0x00008000
35 #define VLYNQ_CTRL_CLOCK_DIV(x) (((x) & 7) << 16)
36 #define VLYNQ_CTRL_INT_LOCAL 0x00004000
37 #define VLYNQ_CTRL_INT_ENABLE 0x00002000
38 #define VLYNQ_CTRL_INT_VECTOR(x) (((x) & 0x1f) << 8)
39 #define VLYNQ_CTRL_INT2CFG 0x00000080
40 #define VLYNQ_CTRL_RESET 0x00000001
42 #define VLYNQ_INT_OFFSET 0x00000014
43 #define VLYNQ_REMOTE_OFFSET 0x00000080
45 #define VLYNQ_STATUS_LINK 0x00000001
46 #define VLYNQ_STATUS_LERROR 0x00000080
47 #define VLYNQ_STATUS_RERROR 0x00000100
49 #define VINT_ENABLE 0x00000100
50 #define VINT_TYPE_EDGE 0x00000080
51 #define VINT_LEVEL_LOW 0x00000040
52 #define VINT_VECTOR(x) ((x) & 0x1f)
53 #define VINT_OFFSET(irq) (8 * ((irq) % 4))
55 #define VLYNQ_AUTONEGO_V2 0x00010000
66 struct vlynq_mapping rx_mapping[4];
73 #define vlynq_reg_read(reg) readl(&(reg))
74 #define vlynq_reg_write(reg, val) writel(val, &(reg))
76 static int __vlynq_enable_device(struct vlynq_device *dev);
79 static void vlynq_dump_regs(struct vlynq_device *dev)
82 printk(KERN_DEBUG "VLYNQ local=%p remote=%p\n",
83 dev->local, dev->remote);
84 for (i = 0; i < 32; i++) {
85 printk(KERN_DEBUG "VLYNQ: local %d: %08x\n",
86 i + 1, ((u32 *)dev->local)[i]);
87 printk(KERN_DEBUG "VLYNQ: remote %d: %08x\n",
88 i + 1, ((u32 *)dev->remote)[i]);
92 static void vlynq_dump_mem(u32 *base, int count)
95 for (i = 0; i < (count + 3) / 4; i++) {
96 if (i % 4 == 0) printk(KERN_DEBUG "\nMEM[0x%04x]:", i * 4);
97 printk(KERN_DEBUG " 0x%08x", *(base + i));
99 printk(KERN_DEBUG "\n");
103 int vlynq_linked(struct vlynq_device *dev)
107 for (i = 0; i < 100; i++)
108 if (vlynq_reg_read(dev->local->status) & VLYNQ_STATUS_LINK)
116 static void vlynq_irq_unmask(unsigned int irq)
119 struct vlynq_device *dev = get_irq_chip_data(irq);
123 virq = irq - dev->irq_start;
124 val = vlynq_reg_read(dev->remote->int_device[virq >> 2]);
125 val |= (VINT_ENABLE | virq) << VINT_OFFSET(virq);
126 vlynq_reg_write(dev->remote->int_device[virq >> 2], val);
129 static void vlynq_irq_mask(unsigned int irq)
132 struct vlynq_device *dev = get_irq_chip_data(irq);
136 virq = irq - dev->irq_start;
137 val = vlynq_reg_read(dev->remote->int_device[virq >> 2]);
138 val &= ~(VINT_ENABLE << VINT_OFFSET(virq));
139 vlynq_reg_write(dev->remote->int_device[virq >> 2], val);
142 static int vlynq_irq_type(unsigned int irq, unsigned int flow_type)
145 struct vlynq_device *dev = get_irq_chip_data(irq);
149 virq = irq - dev->irq_start;
150 val = vlynq_reg_read(dev->remote->int_device[virq >> 2]);
151 switch (flow_type & IRQ_TYPE_SENSE_MASK) {
152 case IRQ_TYPE_EDGE_RISING:
153 case IRQ_TYPE_EDGE_FALLING:
154 case IRQ_TYPE_EDGE_BOTH:
155 val |= VINT_TYPE_EDGE << VINT_OFFSET(virq);
156 val &= ~(VINT_LEVEL_LOW << VINT_OFFSET(virq));
158 case IRQ_TYPE_LEVEL_HIGH:
159 val &= ~(VINT_TYPE_EDGE << VINT_OFFSET(virq));
160 val &= ~(VINT_LEVEL_LOW << VINT_OFFSET(virq));
162 case IRQ_TYPE_LEVEL_LOW:
163 val &= ~(VINT_TYPE_EDGE << VINT_OFFSET(virq));
164 val |= VINT_LEVEL_LOW << VINT_OFFSET(virq);
169 vlynq_reg_write(dev->remote->int_device[virq >> 2], val);
173 static void vlynq_local_ack(unsigned int irq)
175 struct vlynq_device *dev = get_irq_chip_data(irq);
176 u32 status = vlynq_reg_read(dev->local->status);
177 if (printk_ratelimit())
178 printk(KERN_DEBUG "%s: local status: 0x%08x\n",
179 dev->dev.bus_id, status);
180 vlynq_reg_write(dev->local->status, status);
183 static void vlynq_remote_ack(unsigned int irq)
185 struct vlynq_device *dev = get_irq_chip_data(irq);
186 u32 status = vlynq_reg_read(dev->remote->status);
187 if (printk_ratelimit())
188 printk(KERN_DEBUG "%s: remote status: 0x%08x\n",
189 dev->dev.bus_id, status);
190 vlynq_reg_write(dev->remote->status, status);
193 static irqreturn_t vlynq_irq(int irq, void *dev_id)
195 struct vlynq_device *dev = dev_id;
199 status = vlynq_reg_read(dev->local->int_status);
200 vlynq_reg_write(dev->local->int_status, status);
202 if (unlikely(!status))
203 spurious_interrupt();
207 do_IRQ(dev->irq_start + virq);
215 static struct irq_chip vlynq_irq_chip = {
217 .unmask = vlynq_irq_unmask,
218 .mask = vlynq_irq_mask,
219 .set_type = vlynq_irq_type,
222 static struct irq_chip vlynq_local_chip = {
223 .name = "vlynq local error",
224 .unmask = vlynq_irq_unmask,
225 .mask = vlynq_irq_mask,
226 .ack = vlynq_local_ack,
229 static struct irq_chip vlynq_remote_chip = {
230 .name = "vlynq local error",
231 .unmask = vlynq_irq_unmask,
232 .mask = vlynq_irq_mask,
233 .ack = vlynq_remote_ack,
236 static int vlynq_setup_irq(struct vlynq_device *dev)
241 if (dev->local_irq == dev->remote_irq) {
243 "%s: local vlynq irq should be different from remote\n",
248 /* Clear local and remote error bits */
249 vlynq_reg_write(dev->local->status, vlynq_reg_read(dev->local->status));
250 vlynq_reg_write(dev->remote->status,
251 vlynq_reg_read(dev->remote->status));
253 /* Now setup interrupts */
254 val = VLYNQ_CTRL_INT_VECTOR(dev->local_irq);
255 val |= VLYNQ_CTRL_INT_ENABLE | VLYNQ_CTRL_INT_LOCAL |
257 val |= vlynq_reg_read(dev->local->control);
258 vlynq_reg_write(dev->local->int_ptr, VLYNQ_INT_OFFSET);
259 vlynq_reg_write(dev->local->control, val);
261 val = VLYNQ_CTRL_INT_VECTOR(dev->remote_irq);
262 val |= VLYNQ_CTRL_INT_ENABLE;
263 val |= vlynq_reg_read(dev->remote->control);
264 vlynq_reg_write(dev->remote->int_ptr, VLYNQ_INT_OFFSET);
265 vlynq_reg_write(dev->remote->control, val);
267 for (i = dev->irq_start; i <= dev->irq_end; i++) {
268 virq = i - dev->irq_start;
269 if (virq == dev->local_irq) {
270 set_irq_chip_and_handler(i, &vlynq_local_chip,
272 set_irq_chip_data(i, dev);
273 } else if (virq == dev->remote_irq) {
274 set_irq_chip_and_handler(i, &vlynq_remote_chip,
276 set_irq_chip_data(i, dev);
278 set_irq_chip_and_handler(i, &vlynq_irq_chip,
280 set_irq_chip_data(i, dev);
281 vlynq_reg_write(dev->remote->int_device[virq >> 2], 0);
285 if (request_irq(dev->irq, vlynq_irq, IRQF_SHARED, "vlynq", dev)) {
286 printk(KERN_ERR "%s: request_irq failed\n", dev->dev.bus_id);
293 static void vlynq_device_release(struct device *dev)
295 struct vlynq_device *vdev = to_vlynq_device(dev);
299 static int vlynq_device_match(struct device *dev,
300 struct device_driver *drv)
302 struct vlynq_device *vdev = to_vlynq_device(dev);
303 struct vlynq_driver *vdrv = to_vlynq_driver(drv);
304 struct plat_vlynq_ops *ops = dev->platform_data;
305 struct vlynq_device_id *ids = vdrv->id_table;
311 if (ids->divisor != vlynq_div_auto
312 && vdev->divisor == vlynq_div_auto) {
314 vdev->divisor = ids->divisor;
315 result = __vlynq_enable_device(vdev);
317 id = vlynq_reg_read(vdev->remote->chip);
318 vlynq_reg_write(vdev->local->control, 0);
319 vlynq_reg_write(vdev->remote->control, 0);
327 vlynq_set_drvdata(vdev, ids);
328 printk(KERN_INFO "Driver found for VLYNQ " \
329 "device: %08x\n", id);
332 printk(KERN_INFO "Not using the %08x VLYNQ device's " \
333 "driver for VLYNQ device: %08x\n", ids->id, id);
336 vdev->divisor = vlynq_div_auto;
341 static int vlynq_device_probe(struct device *dev)
343 struct vlynq_device *vdev = to_vlynq_device(dev);
344 struct vlynq_driver *drv = to_vlynq_driver(dev->driver);
345 struct vlynq_device_id *id = vlynq_get_drvdata(vdev);
346 int result = -ENODEV;
349 if (drv && drv->probe)
350 result = drv->probe(vdev, id);
356 static int vlynq_device_remove(struct device *dev)
358 struct vlynq_driver *drv = to_vlynq_driver(dev->driver);
359 if (drv && drv->remove)
360 drv->remove(to_vlynq_device(dev));
365 int __vlynq_register_driver(struct vlynq_driver *driver, struct module *owner)
367 driver->driver.name = driver->name;
368 driver->driver.bus = &vlynq_bus_type;
369 return driver_register(&driver->driver);
371 EXPORT_SYMBOL(__vlynq_register_driver);
373 void vlynq_unregister_driver(struct vlynq_driver *driver)
375 driver_unregister(&driver->driver);
377 EXPORT_SYMBOL(vlynq_unregister_driver);
379 static int __vlynq_enable_device(struct vlynq_device *dev)
382 struct plat_vlynq_ops *ops = dev->dev.platform_data;
384 result = ops->on(dev);
388 vlynq_reg_write(dev->local->control, 0);
389 vlynq_reg_write(dev->remote->control, 0);
390 if (vlynq_linked(dev)) {
391 printk(KERN_DEBUG "%s: using external clock\n",
396 switch (dev->divisor) {
398 /* Only try locally supplied clock, others cause problems */
399 vlynq_reg_write(dev->local->control, 0);
400 vlynq_reg_write(dev->remote->control, 0);
401 for (i = vlynq_ldiv2; i <= vlynq_ldiv8; i++) {
402 vlynq_reg_write(dev->local->control,
403 VLYNQ_CTRL_CLOCK_INT |
404 VLYNQ_CTRL_CLOCK_DIV(i - vlynq_ldiv1));
405 if (vlynq_linked(dev)) {
407 "%s: using local clock divisor %d\n",
408 dev->dev.bus_id, i - vlynq_ldiv1 + 1);
413 case vlynq_ldiv1: case vlynq_ldiv2: case vlynq_ldiv3: case vlynq_ldiv4:
414 case vlynq_ldiv5: case vlynq_ldiv6: case vlynq_ldiv7: case vlynq_ldiv8:
415 vlynq_reg_write(dev->local->control,
416 VLYNQ_CTRL_CLOCK_INT |
417 VLYNQ_CTRL_CLOCK_DIV(dev->divisor -
419 vlynq_reg_write(dev->remote->control, 0);
420 if (vlynq_linked(dev)) {
422 "%s: using local clock divisor %d\n",
423 dev->dev.bus_id, dev->divisor - vlynq_ldiv1 + 1);
427 case vlynq_rdiv1: case vlynq_rdiv2: case vlynq_rdiv3: case vlynq_rdiv4:
428 case vlynq_rdiv5: case vlynq_rdiv6: case vlynq_rdiv7: case vlynq_rdiv8:
429 vlynq_reg_write(dev->local->control, 0);
430 vlynq_reg_write(dev->remote->control,
431 VLYNQ_CTRL_CLOCK_INT |
432 VLYNQ_CTRL_CLOCK_DIV(dev->divisor -
434 if (vlynq_linked(dev)) {
436 "%s: using remote clock divisor %d\n",
437 dev->dev.bus_id, dev->divisor - vlynq_rdiv1 + 1);
447 int vlynq_enable_device(struct vlynq_device *dev)
449 struct plat_vlynq_ops *ops = dev->dev.platform_data;
450 int result = -ENODEV;
452 result = __vlynq_enable_device(dev);
456 result = vlynq_setup_irq(dev);
460 dev->enabled = !result;
463 EXPORT_SYMBOL(vlynq_enable_device);
466 void vlynq_disable_device(struct vlynq_device *dev)
468 struct plat_vlynq_ops *ops = dev->dev.platform_data;
471 free_irq(dev->irq, dev);
474 EXPORT_SYMBOL(vlynq_disable_device);
476 int vlynq_set_local_mapping(struct vlynq_device *dev, u32 tx_offset,
477 struct vlynq_mapping *mapping)
484 vlynq_reg_write(dev->local->tx_offset, tx_offset);
485 for (i = 0; i < 4; i++) {
486 vlynq_reg_write(dev->local->rx_mapping[i].offset,
488 vlynq_reg_write(dev->local->rx_mapping[i].size,
493 EXPORT_SYMBOL(vlynq_set_local_mapping);
495 int vlynq_set_remote_mapping(struct vlynq_device *dev, u32 tx_offset,
496 struct vlynq_mapping *mapping)
503 vlynq_reg_write(dev->remote->tx_offset, tx_offset);
504 for (i = 0; i < 4; i++) {
505 vlynq_reg_write(dev->remote->rx_mapping[i].offset,
507 vlynq_reg_write(dev->remote->rx_mapping[i].size,
512 EXPORT_SYMBOL(vlynq_set_remote_mapping);
514 int vlynq_set_local_irq(struct vlynq_device *dev, int virq)
516 int irq = dev->irq_start + virq;
520 if ((irq < dev->irq_start) || (irq > dev->irq_end))
523 if (virq == dev->remote_irq)
526 dev->local_irq = virq;
530 EXPORT_SYMBOL(vlynq_set_local_irq);
532 int vlynq_set_remote_irq(struct vlynq_device *dev, int virq)
534 int irq = dev->irq_start + virq;
538 if ((irq < dev->irq_start) || (irq > dev->irq_end))
541 if (virq == dev->local_irq)
544 dev->remote_irq = virq;
548 EXPORT_SYMBOL(vlynq_set_remote_irq);
550 static int vlynq_probe(struct platform_device *pdev)
552 struct vlynq_device *dev;
553 struct resource *regs_res, *mem_res, *irq_res;
556 regs_res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "regs");
560 mem_res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "mem");
564 irq_res = platform_get_resource_byname(pdev, IORESOURCE_IRQ, "devirq");
568 dev = kzalloc(sizeof(*dev), GFP_KERNEL);
571 "vlynq: failed to allocate device structure\n");
576 dev->dev.bus = &vlynq_bus_type;
577 dev->dev.parent = &pdev->dev;
578 snprintf(dev->dev.bus_id, BUS_ID_SIZE, "vlynq%d", dev->id);
579 dev->dev.bus_id[BUS_ID_SIZE - 1] = 0;
580 dev->dev.platform_data = pdev->dev.platform_data;
581 dev->dev.release = vlynq_device_release;
583 dev->regs_start = regs_res->start;
584 dev->regs_end = regs_res->end;
585 dev->mem_start = mem_res->start;
586 dev->mem_end = mem_res->end;
588 len = regs_res->end - regs_res->start;
589 if (!request_mem_region(regs_res->start, len, dev->dev.bus_id)) {
590 printk(KERN_ERR "%s: Can't request vlynq registers\n",
596 dev->local = ioremap(regs_res->start, len);
598 printk(KERN_ERR "%s: Can't remap vlynq registers\n",
604 dev->remote = (struct vlynq_regs *)((void *)dev->local +
605 VLYNQ_REMOTE_OFFSET);
607 dev->irq = platform_get_irq_byname(pdev, "irq");
608 dev->irq_start = irq_res->start;
609 dev->irq_end = irq_res->end;
610 dev->local_irq = dev->irq_end - dev->irq_start;
611 dev->remote_irq = dev->local_irq - 1;
613 if (device_register(&dev->dev))
615 platform_set_drvdata(pdev, dev);
617 printk(KERN_INFO "%s: regs 0x%p, irq %d, mem 0x%p\n",
618 dev->dev.bus_id, (void *)dev->regs_start, dev->irq,
619 (void *)dev->mem_start);
621 dev->divisor = vlynq_div_auto;
622 result = __vlynq_enable_device(dev);
624 dev->dev_id = vlynq_reg_read(dev->remote->chip);
625 vlynq_reg_write(dev->local->control, 0);
626 vlynq_reg_write(dev->remote->control, 0);
627 ((struct plat_vlynq_ops *)(dev->dev.platform_data))->off(dev);
631 printk(KERN_INFO "Found a VLYNQ device: %08x\n", dev->dev_id);
639 release_mem_region(regs_res->start, len);
644 static int vlynq_remove(struct platform_device *pdev)
646 struct vlynq_device *dev = platform_get_drvdata(pdev);
648 device_unregister(&dev->dev);
650 release_mem_region(dev->regs_start, dev->regs_end - dev->regs_start);
657 static struct platform_driver vlynq_platform_driver = {
658 .driver.name = "vlynq",
659 .probe = vlynq_probe,
660 .remove = __devexit_p(vlynq_remove),
663 struct bus_type vlynq_bus_type = {
665 .match = vlynq_device_match,
666 .probe = vlynq_device_probe,
667 .remove = vlynq_device_remove,
669 EXPORT_SYMBOL(vlynq_bus_type);
671 static int __devinit vlynq_init(void)
675 res = bus_register(&vlynq_bus_type);
679 res = platform_driver_register(&vlynq_platform_driver);
686 bus_unregister(&vlynq_bus_type);
691 static void __devexit vlynq_exit(void)
693 platform_driver_unregister(&vlynq_platform_driver);
694 bus_unregister(&vlynq_bus_type);
697 module_init(vlynq_init);
698 module_exit(vlynq_exit);