Openwrt/target/linux/ar7-2.6/files/arch/mips/ar7/vlynq.c
Nicolas Thill 71fb2a6b6e fix vlynq initialization (closes: #2135)
SVN-Revision: 8423
2007-08-18 15:40:31 +00:00

554 lines
13 KiB
C

/*
* $Id$
*
* Copyright (C) 2006, 2007 OpenWrt.org
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include <linux/init.h>
#include <linux/types.h>
#include <linux/kernel.h>
#include <linux/string.h>
#include <linux/delay.h>
#include <linux/device.h>
#include <linux/ioport.h>
#include <linux/errno.h>
#include <linux/platform_device.h>
#include <linux/irq.h>
#include <linux/interrupt.h>
#include <linux/device.h>
#include <asm/addrspace.h>
#include <asm/io.h>
#include <asm/ar7/ar7.h>
#include <asm/ar7/vlynq.h>
#define PER_DEVICE_IRQS 32
#define VLYNQ_CTRL_PM_ENABLE 0x80000000
#define VLYNQ_CTRL_CLOCK_INT 0x00008000
#define VLYNQ_CTRL_CLOCK_DIV(x) ((x & 7) << 16)
#define VLYNQ_CTRL_INT_LOCAL 0x00004000
#define VLYNQ_CTRL_INT_ENABLE 0x00002000
#define VLYNQ_CTRL_INT_VECTOR(x) ((x & 0x1f) << 8)
#define VLYNQ_CTRL_INT2CFG 0x00000080
#define VLYNQ_CTRL_RESET 0x00000001
#define VLYNQ_STATUS_RERROR 0x00000100
#define VLYNQ_STATUS_LERROR 0x00000080
#define VLYNQ_STATUS_LINK 0x00000001
#define VINT_ENABLE 0x00000100
#define VINT_TYPE_EDGE 0x00000080
#define VINT_LEVEL_LOW 0x00000040
#define VINT_VECTOR(x) (x & 0x1f)
#define VINT_OFFSET(irq) (8 * ((irq) % 4))
#define VLYNQ_AUTONEGO_V2 0x00010000
struct vlynq_regs {
volatile u32 revision;
volatile u32 control;
volatile u32 status;
volatile u32 int_prio;
volatile u32 int_status;
volatile u32 int_pending;
volatile u32 int_ptr;
volatile u32 tx_offset;
volatile struct vlynq_mapping rx_mapping[4];
volatile u32 chip;
volatile u32 autonego;
volatile u32 unused[6];
volatile u32 int_device[8];
} __attribute__ ((packed));
#ifdef VLYNQ_DEBUG
static void vlynq_dump_regs(struct vlynq_device *dev)
{
int i;
printk("VLYNQ local=%p remote=%p\n", dev->local, dev->remote);
for (i = 0; i < 32; i++) {
printk("VLYNQ: local %d: %08x\n", i + 1, ((u32 *)dev->local)[i]);
printk("VLYNQ: remote %d: %08x\n", i + 1, ((u32 *)dev->remote)[i]);
}
}
static void vlynq_dump_mem(u32 *base, int count)
{
int i;
for (i = 0; i < (count + 3) / 4; i++) {
if (i % 4 == 0) printk("\nMEM[0x%04x]:", i * 4);
printk(" 0x%08x", *(base + i));
}
printk("\n");
}
#endif
int vlynq_linked(struct vlynq_device *dev)
{
int i;
for (i = 0; i < 10; i++)
if (dev->local->status & VLYNQ_STATUS_LINK) {
printk("%s: linked\n", dev->dev.bus_id);
return 1;
} else {
mdelay(1);
}
return 0;
}
static void vlynq_irq_unmask(unsigned int irq)
{
volatile u32 val;
struct vlynq_device *dev = irq_desc[irq].chip_data;
int virq;
BUG_ON(!dev);
virq = irq - dev->irq_start;
val = dev->remote->int_device[virq >> 2];
val |= (VINT_ENABLE | virq) << VINT_OFFSET(virq);
dev->remote->int_device[virq >> 2] = val;
}
static void vlynq_irq_mask(unsigned int irq)
{
volatile u32 val;
struct vlynq_device *dev = irq_desc[irq].chip_data;
int virq;
BUG_ON(!dev);
virq = irq - dev->irq_start;
val = dev->remote->int_device[virq >> 2];
val &= ~(VINT_ENABLE << VINT_OFFSET(virq));
dev->remote->int_device[virq >> 2] = val;
}
static int vlynq_irq_type(unsigned int irq, unsigned int flow_type)
{
volatile u32 val;
struct vlynq_device *dev = irq_desc[irq].chip_data;
int virq;
BUG_ON(!dev);
virq = irq - dev->irq_start;
val = dev->remote->int_device[virq >> 2];
switch (flow_type & IRQ_TYPE_SENSE_MASK) {
case IRQ_TYPE_EDGE_RISING:
case IRQ_TYPE_EDGE_FALLING:
case IRQ_TYPE_EDGE_BOTH:
val |= VINT_TYPE_EDGE << VINT_OFFSET(virq);
val &= ~(VINT_LEVEL_LOW << VINT_OFFSET(virq));
break;
case IRQ_TYPE_LEVEL_HIGH:
val &= ~(VINT_TYPE_EDGE << VINT_OFFSET(virq));
val &= ~(VINT_LEVEL_LOW << VINT_OFFSET(virq));
break;
case IRQ_TYPE_LEVEL_LOW:
val &= ~(VINT_TYPE_EDGE << VINT_OFFSET(virq));
val |= VINT_LEVEL_LOW << VINT_OFFSET(virq);
break;
default:
return -EINVAL;
}
dev->remote->int_device[virq >> 2] = val;
return 0;
}
static irqreturn_t vlynq_irq(int irq, void *dev_id)
{
struct vlynq_device *dev = dev_id;
u32 status, ack;
int virq = 0;
status = dev->local->int_status;
dev->local->int_status = status;
if (status & (1 << dev->local_irq)) { /* Local vlynq IRQ. Ack */
ack = dev->local->status;
dev->local->status = ack;
}
if (status & (1 << dev->remote_irq)) { /* Remote vlynq IRQ. Ack */
ack = dev->remote->status;
dev->remote->status = ack;
}
status &= ~((1 << dev->local_irq) | (1 << dev->remote_irq));
while (status) {
if (status & 1) /* Remote device IRQ. Pass. */
do_IRQ(dev->irq_start + virq);
status >>= 1;
virq++;
}
return IRQ_HANDLED;
}
static struct irq_chip vlynq_irq_chip = {
.typename = "VLYNQ",
.name = "vlynq",
.unmask = vlynq_irq_unmask,
.mask = vlynq_irq_mask,
.set_type = vlynq_irq_type,
};
static int vlynq_setup_irq(struct vlynq_device *dev)
{
u32 val;
int i;
if (dev->local_irq == dev->remote_irq) {
printk("%s: local vlynq irq should be different from remote\n",
dev->dev.bus_id);
return -EINVAL;
}
val = VLYNQ_CTRL_INT_VECTOR(dev->local_irq);
val |= VLYNQ_CTRL_INT_ENABLE | VLYNQ_CTRL_INT_LOCAL |
VLYNQ_CTRL_INT2CFG;
dev->local->int_ptr = 0x14;
dev->local->control |= val;
val = VLYNQ_CTRL_INT_VECTOR(dev->remote_irq);
val |= VLYNQ_CTRL_INT_ENABLE;
dev->remote->int_ptr = 0x14;
dev->remote->control |= val;
for (i = 0; i < PER_DEVICE_IRQS; i++) {
if ((i == dev->local_irq) || (i == dev->remote_irq))
continue;
irq_desc[dev->irq_start + i].status = IRQ_DISABLED;
irq_desc[dev->irq_start + i].action = 0;
irq_desc[dev->irq_start + i].depth = 1;
irq_desc[dev->irq_start + i].chip = &vlynq_irq_chip;
irq_desc[dev->irq_start + i].chip_data = dev;
dev->remote->int_device[i >> 2] = 0;
}
if (request_irq(dev->irq, vlynq_irq, SA_SHIRQ, "vlynq", dev)) {
printk("%s: request_irq failed\n", dev->dev.bus_id);
return -EAGAIN;
}
return 0;
}
static void vlynq_free_irq(struct vlynq_device *dev)
{
free_irq(dev->irq, dev);
}
static void vlynq_device_release(struct device *dev)
{
struct vlynq_device *vdev = to_vlynq_device(dev);
kfree(vdev);
}
static int vlynq_device_probe(struct device *dev)
{
struct vlynq_driver *drv = to_vlynq_driver(dev->driver);
if (drv->probe)
return drv->probe(to_vlynq_device(dev));
return 0;
}
static int vlynq_device_remove(struct device *dev)
{
struct vlynq_driver *drv = to_vlynq_driver(dev->driver);
if (drv->remove)
return drv->remove(to_vlynq_device(dev));
return 0;
}
int __vlynq_register_driver(struct vlynq_driver *driver, struct module *owner)
{
driver->driver.name = driver->name;
driver->driver.bus = &vlynq_bus_type;
/* driver->driver.owner = owner;*/
return driver_register(&driver->driver);
}
EXPORT_SYMBOL(__vlynq_register_driver);
void vlynq_unregister_driver(struct vlynq_driver *driver)
{
driver_unregister(&driver->driver);
}
EXPORT_SYMBOL(vlynq_unregister_driver);
int vlynq_device_enable(struct vlynq_device *dev)
{
u32 div;
int result;
struct plat_vlynq_ops *ops = dev->dev.platform_data;
result = ops->on(dev);
if (result)
return result;
dev->local->control = 0;
dev->remote->control = 0;
dev->local->control = VLYNQ_CTRL_CLOCK_INT;
div = ar7_dsp_freq() / 62500000;
if (div != 0 ) {
if (ar7_dsp_freq() / div != 62500000) {
printk(KERN_WARNING
"VLYNQ: Adjusted requested frequency %d to %d\n",
62500000, ar7_dsp_freq() / div);
}
printk("VLYNQ: Setting clock to %d (clock divider %u)\n",
ar7_dsp_freq() / div, div);
dev->local->control |= VLYNQ_CTRL_CLOCK_DIV((div - 1));
}
if (vlynq_linked(dev))
return vlynq_setup_irq(dev);
return -ENODEV;
}
void vlynq_device_disable(struct vlynq_device *dev)
{
struct plat_vlynq_ops *ops = dev->dev.platform_data;
vlynq_free_irq(dev);
ops->off(dev);
}
u32 vlynq_local_id(struct vlynq_device *dev)
{
return dev->local->chip;
}
u32 vlynq_remote_id(struct vlynq_device *dev)
{
return dev->remote->chip;
}
void vlynq_set_local_mapping(struct vlynq_device *dev, u32 tx_offset,
struct vlynq_mapping *mapping)
{
int i;
dev->local->tx_offset = tx_offset;
for (i = 0; i < 4; i++) {
dev->local->rx_mapping[i].offset = mapping[i].offset;
dev->local->rx_mapping[i].size = mapping[i].size;
}
}
void vlynq_set_remote_mapping(struct vlynq_device *dev, u32 tx_offset,
struct vlynq_mapping *mapping)
{
int i;
dev->remote->tx_offset = tx_offset;
for (i = 0; i < 4; i++) {
dev->remote->rx_mapping[i].offset = mapping[i].offset;
dev->remote->rx_mapping[i].size = mapping[i].size;
}
}
int vlynq_virq_to_irq(struct vlynq_device *dev, int virq)
{
if ((virq < 0) || (virq >= PER_DEVICE_IRQS))
return -EINVAL;
if ((virq == dev->local_irq) || (virq == dev->remote_irq))
return -EINVAL;
return dev->irq_start + virq;
}
int vlynq_irq_to_virq(struct vlynq_device *dev, int irq)
{
if ((irq < dev->irq_start) || (irq >= dev->irq_start + PER_DEVICE_IRQS))
return -EINVAL;
return irq - dev->irq_start;
}
int vlynq_set_local_irq(struct vlynq_device *dev, int virq)
{
if ((virq < 0) || (virq >= PER_DEVICE_IRQS))
return -EINVAL;
if (virq == dev->remote_irq)
return -EINVAL;
dev->local_irq = virq;
return 0;
}
int vlynq_set_remote_irq(struct vlynq_device *dev, int virq)
{
if ((virq < 0) || (virq >= PER_DEVICE_IRQS))
return -EINVAL;
if (virq == dev->local_irq)
return -EINVAL;
dev->remote_irq = virq;
return 0;
}
static int vlynq_probe(struct platform_device *pdev)
{
struct vlynq_device *dev;
struct resource *regs_res, *mem_res, *irq_res;
int len, result;
if (strcmp(pdev->name, "vlynq"))
return -ENODEV;
regs_res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "regs");
if (!regs_res)
return -ENODEV;
mem_res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "mem");
if (!mem_res)
return -ENODEV;
irq_res = platform_get_resource_byname(pdev, IORESOURCE_IRQ, "devirq");
if (!irq_res)
return -ENODEV;
dev = kmalloc(sizeof(struct vlynq_device), GFP_KERNEL);
if (!dev) {
printk(KERN_ERR "vlynq: failed to allocate device structure\n");
return -ENOMEM;
}
memset(dev, 0, sizeof(struct vlynq_device));
dev->id = pdev->id;
dev->dev.bus = &vlynq_bus_type;
dev->dev.parent = &pdev->dev;
snprintf(dev->dev.bus_id, BUS_ID_SIZE, "vlynq%d", dev->id);
dev->dev.bus_id[BUS_ID_SIZE - 1] = 0;
dev->dev.platform_data = pdev->dev.platform_data;
dev->dev.release = vlynq_device_release;
dev->regs_start = regs_res->start;
dev->regs_end = regs_res->end;
dev->mem_start = mem_res->start;
dev->mem_end = mem_res->end;
len = regs_res->end - regs_res->start;
if (!request_mem_region(regs_res->start, len, dev->dev.bus_id)) {
printk("%s: Can't request vlynq registers\n", dev->dev.bus_id);
result = -ENXIO;
goto fail_request;
}
dev->local = ioremap_nocache(regs_res->start, len);
if (!dev->local) {
printk("%s: Can't remap vlynq registers\n", dev->dev.bus_id);
result = -ENXIO;
goto fail_remap;
}
dev->remote = (struct vlynq_regs *)((u32)dev->local + 128);
dev->irq = platform_get_irq_byname(pdev, "irq");
dev->irq_start = irq_res->start;
dev->irq_end = irq_res->end;
dev->local_irq = 31;
dev->remote_irq = 30;
if (device_register(&dev->dev))
goto fail_register;
platform_set_drvdata(pdev, dev);
printk("%s: regs 0x%p, irq %d, mem 0x%p\n",
dev->dev.bus_id, (void *)dev->regs_start, dev->irq,
(void *)dev->mem_start);
return 0;
fail_register:
fail_remap:
iounmap(dev->local);
fail_request:
release_mem_region(regs_res->start, len);
kfree(dev);
return result;
}
static int vlynq_remove(struct platform_device *pdev)
{
struct vlynq_device *dev = platform_get_drvdata(pdev);
device_unregister(&dev->dev);
release_mem_region(dev->regs_start, dev->regs_end - dev->regs_start);
kfree(dev);
return 0;
}
static struct platform_driver vlynq_driver = {
.driver.name = "vlynq",
.probe = vlynq_probe,
.remove = vlynq_remove,
};
struct bus_type vlynq_bus_type = {
.name = "vlynq",
.probe = vlynq_device_probe,
.remove = vlynq_device_remove,
};
EXPORT_SYMBOL(vlynq_bus_type);
#ifdef CONFIG_PCI
extern void vlynq_pci_init(void);
#endif
int __init vlynq_init(void)
{
int res = 0;
res = bus_register(&vlynq_bus_type);
if (res)
goto fail_bus;
res = platform_driver_register(&vlynq_driver);
if (res)
goto fail_platform;
#ifdef CONFIG_PCI
vlynq_pci_init();
#endif
return 0;
fail_platform:
bus_unregister(&vlynq_bus_type);
fail_bus:
return res;
}
/*
void __devexit vlynq_exit(void)
{
platform_driver_unregister(&vlynq_driver);
bus_unregister(&vlynq_bus_type);
}
*/
subsys_initcall(vlynq_init);