/*
* Glue code for the ISP1760 driver and bus
* Currently there is support for
* - OpenFirmware
* - PCI
*
* (c) 2007 Sebastian Siewior <bigeasy@linutronix.de>
*
*/
#include <linux/usb.h>
#include <linux/io.h>
#include "../core/hcd.h"
#include "isp1760-hcd.h"
#ifdef CONFIG_USB_ISP1760_OF
#include <linux/of.h>
#include <linux/of_platform.h>
#endif
#ifdef CONFIG_USB_ISP1760_PCI
#include <linux/pci.h>
#endif
#ifdef CONFIG_USB_ISP1760_OF
static int of_isp1760_probe(struct of_device *dev,
const struct of_device_id *match)
{
struct usb_hcd *hcd;
struct device_node *dp = dev->node;
struct resource *res;
struct resource memory;
struct of_irq oirq;
int virq;
u64 res_len;
int ret;
ret = of_address_to_resource(dp, 0, &memory);
if (ret)
return -ENXIO;
res = request_mem_region(memory.start, memory.end - memory.start + 1,
dev->dev.bus_id);
if (!res)
return -EBUSY;
res_len = memory.end - memory.start + 1;
if (of_irq_map_one(dp, 0, &oirq)) {
ret = -ENODEV;
goto release_reg;
}
virq = irq_create_of_mapping(oirq.controller, oirq.specifier,
oirq.size);
hcd = isp1760_register(memory.start, res_len, virq,
IRQF_SHARED | IRQF_DISABLED, &dev->dev, dev->dev.bus_id);
if (IS_ERR(hcd)) {
ret = PTR_ERR(hcd);
goto release_reg;
}
dev_set_drvdata(&dev->dev, hcd);
return ret;
release_reg:
release_mem_region(memory.start, memory.end - memory.start + 1);
return ret;
}
static int of_isp1760_remove(struct of_device *dev)
{
struct usb_hcd *hcd = dev_get_drvdata(&dev->dev);
dev_set_drvdata(&dev->dev, NULL);
usb_remove_hcd(hcd);
iounmap(hcd->regs);
release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
usb_put_hcd(hcd);
return 0;
}
static struct of_device_id of_isp1760_match[] = {
{
.compatible = "nxp,usb-isp1760",
},
{ },
};
MODULE_DEVICE_TABLE(of, of_isp1760_match);
static struct of_platform_driver isp1760_of_driver = {
.name = "nxp-isp1760",
.match_table = of_isp1760_match,
.probe = of_isp1760_probe,
.remove = of_isp1760_remove,
};
#endif
#ifdef CONFIG_USB_ISP1760_PCI
static u32 nxp_pci_io_base;
static u32 iolength;
static u32 pci_mem_phy0;
static u32 length;
static u8 *chip_addr;
static u8 *iobase;
static int __devinit isp1761_pci_probe(struct pci_dev *dev,
const struct pci_device_id *id)
{
u8 latency, limit;
__u32 reg_data;
int retry_count;
int length;
int status = 1;
struct usb_hcd *hcd;
if (usb_disabled())
return -ENODEV;
if (pci_enable_device(dev) < 0)
return -ENODEV;
if (!dev->irq)
return -ENODEV;
/* Grab the PLX PCI mem maped port start address we need */
nxp_pci_io_base = pci_resource_start(dev, 0);
iolength = pci_resource_len(dev, 0);
if (!request_mem_region(nxp_pci_io_base, iolength, "ISP1761 IO MEM")) {
printk(KERN_ERR "request region #1\n");
return -EBUSY;
}
iobase = ioremap_nocache(nxp_pci_io_base, iolength);
if (!iobase) {
printk(KERN_ERR "ioremap #1\n");
release_mem_region(nxp_pci_io_base, iolength);
return -ENOMEM;
}
/* Grab the PLX PCI shared memory of the ISP 1761 we need */
pci_mem_phy0 = pci_resource_start(dev, 3);
length = pci_resource_len(dev, 3);
if (length < 0xffff) {
printk(KERN_ERR "memory length for this resource is less than "
"required\n");
release_mem_region(nxp_pci_io_base, iolength);
iounmap(iobase);
return -ENOMEM;
}
if (!request_mem_region(pci_mem_phy0, length, "ISP-PCI")) {
printk(KERN_ERR "host controller already in use\n");
release_mem_region(nxp_pci_io_base, iolength);
iounmap(iobase);
return -EBUSY;
}
/* bad pci latencies can contribute to overruns */
pci_read_config_byte(dev, PCI_LATENCY_TIMER, &latency);
if (latency) {
pci_read_config_byte(dev, PCI_MAX_LAT, &limit);
if (limit && limit < latency)
pci_write_config_byte(dev, PCI_LATENCY_TIMER, limit);
}
/* Try to check whether we can access Scratch Register of
* Host Controller or not. The initial PCI access is retried until
* local init for the PCI bridge is completed
*/
retry_count = 20;
reg_data = 0;
while ((reg_data != 0xFACE) && retry_count) {
/*by default host is in 16bit mode, so
* io operations at this stage must be 16 bit
* */
writel(0xface, chip_addr + HC_SCRATCH_REG);
udelay(100);
reg_data = readl(chip_addr + HC_SCRATCH_REG);
retry_count--;
}
/* Host Controller presence is detected by writing to scratch register
* and reading back and checking the contents are same or not
*/
if (reg_data != 0xFACE) {
err("scratch register mismatch %x", reg_data);
goto clean;
}
pci_set_master(dev);
status = readl(iobase + 0x68);
status |= 0x900;
writel(status, iobase + 0x68);
dev->dev.dma_mask = NULL;
hcd = isp1760_register(pci_mem_phy0, length, dev->irq,
IRQF_SHARED | IRQF_DISABLED, &dev->dev, dev->dev.bus_id);
pci_set_drvdata(dev, hcd);
if (!hcd)
return 0;
clean:
status = -ENODEV;
iounmap(iobase);
release_mem_region(pci_mem_phy0, length);
release_mem_region(nxp_pci_io_base, iolength);
return status;
}
static void isp1761_pci_remove(struct pci_dev *dev)
{
struct usb_hcd *hcd;
hcd = pci_get_drvdata(dev);
usb_remove_hcd(hcd);
iounmap(hcd->regs);
release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
usb_put_hcd(hcd);
pci_disable_device(dev);
iounmap(iobase);
iounmap(chip_addr);
release_mem_region(nxp_pci_io_base, iolength);
release_mem_region(pci_mem_phy0, length);
}
static void isp1761_pci_shutdown(struct pci_dev *dev)
{
printk(KERN_ERR "ips1761_pci_shutdown\n");
}
static const struct pci_device_id isp1760_plx [] = { {
/* handle any USB 2.0 EHCI controller */
PCI_DEVICE_CLASS(((PCI_CLASS_BRIDGE_OTHER << 8) | (0x06 << 16)), ~0),
.driver_data = 0,
},
{ /* end: all zeroes */ }
};
MODULE_DEVICE_TABLE(pci, isp1760_plx);
static struct pci_driver isp1761_pci_driver = {
.name = "isp1760",
.id_table = isp1760_plx,
.probe = isp1761_pci_probe,
.remove = isp1761_pci_remove,
.shutdown = isp1761_pci_shutdown,
};
#endif
static int __init isp1760_init(void)
{
int ret = -ENODEV;
init_kmem_once();
#ifdef CONFIG_USB_ISP1760_OF
ret = of_register_platform_driver(&isp1760_of_driver);
if (ret) {
deinit_kmem_cache();
return ret;
}
#endif
#ifdef CONFIG_USB_ISP1760_PCI
ret = pci_register_driver(&isp1761_pci_driver);
if (ret)
goto unreg_of;
#endif
return ret;
#ifdef CONFIG_USB_ISP1760_PCI
unreg_of:
#endif
#ifdef CONFIG_USB_ISP1760_OF
of_unregister_platform_driver(&isp1760_of_driver);
#endif
deinit_kmem_cache();
return ret;
}
module_init(isp1760_init);
static void __exit isp1760_exit(void)
{
#ifdef CONFIG_USB_ISP1760_OF
of_unregister_platform_driver(&isp1760_of_driver);
#endif
#ifdef CONFIG_USB_ISP1760_PCI
pci_unregister_driver(&isp1761_pci_driver);
#endif
deinit_kmem_cache();
}
module_exit(isp1760_exit);
