/*
* Glue code for the ISP1760 driver and bus
* Currently there is support for
* - OpenFirmware
* - PCI
* - PDEV (generic platform device centralized driver model)
*
* (c) 2007 Sebastian Siewior <bigeasy@linutronix.de>
*
*/
#include <linux/usb.h>
#include <linux/io.h>
#include <linux/platform_device.h>
#include <linux/usb/isp1760.h>
#include <linux/usb/hcd.h>
#include "isp1760-hcd.h"
#ifdef CONFIG_PPC_OF
#include <linux/of.h>
#include <linux/of_platform.h>
#endif
#ifdef CONFIG_PCI
#include <linux/pci.h>
#endif
#ifdef CONFIG_PPC_OF
static int of_isp1760_probe(struct platform_device *dev,
const struct of_device_id *match)
{
struct usb_hcd *hcd;
struct device_node *dp = dev->dev.of_node;
struct resource *res;
struct resource memory;
struct of_irq oirq;
int virq;
resource_size_t res_len;
int ret;
const unsigned int *prop;
unsigned int devflags = 0;
ret = of_address_to_resource(dp, 0, &memory);
if (ret)
return -ENXIO;
res_len = resource_size(&memory);
res = request_mem_region(memory.start, res_len, dev_name(&dev->dev));
if (!res)
return -EBUSY;
if (of_irq_map_one(dp, 0, &oirq)) {
ret = -ENODEV;
goto release_reg;
}
virq = irq_create_of_mapping(oirq.controller, oirq.specifier,
oirq.size);
if (of_device_is_compatible(dp, "nxp,usb-isp1761"))
devflags |= ISP1760_FLAG_ISP1761;
/* Some systems wire up only 16 of the 32 data lines */
prop = of_get_property(dp, "bus-width", NULL);
if (prop && *prop == 16)
devflags |= ISP1760_FLAG_BUS_WIDTH_16;
if (of_get_property(dp, "port1-otg", NULL) != NULL)
devflags |= ISP1760_FLAG_OTG_EN;
if (of_get_property(dp, "analog-oc", NULL) != NULL)
devflags |= ISP1760_FLAG_ANALOG_OC;
if (of_get_property(dp, "dack-polarity", NULL) != NULL)
devflags |= ISP1760_FLAG_DACK_POL_HIGH;
if (of_get_property(dp, "dreq-polarity", NULL) != NULL)
devflags |= ISP1760_FLAG_DREQ_POL_HIGH;
hcd = isp1760_register(memory.start, res_len, virq,
IRQF_SHARED | IRQF_DISABLED, &dev->dev, dev_name(&dev->dev),
devflags);
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, res_len);
return ret;
}
static int of_isp1760_remove(struct platform_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 const struct of_device_id of_isp1760_match[] = {
{
.compatible = "nxp,usb-isp1760",
},
{
.compatible = "nxp,usb-isp1761",
},
{ },
};
MODULE_DEVICE_TABLE(of, of_isp1760_match);
static struct of_platform_driver isp1760_of_driver = {
.driver = {
.name = "nxp-isp1760",
.owner = THIS_MODULE,
.of_match_table = of_isp1760_match,
},
.probe = of_isp1760_probe,
.remove = of_isp1760_remove,
};
#endif
#ifdef CONFIG_PCI
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;
struct usb_hcd *hcd;
unsigned int devflags = 0;
int ret_status = 0;
resource_size_t pci_mem_phy0;
resource_size_t memlength;
u8 __iomem *chip_addr;
u8 __iomem *iobase;
resource_size_t nxp_pci_io_base;
resource_size_t iolength;
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");
ret_status = -ENOMEM;
goto cleanup1;
}
/* Grab the PLX PCI shared memory of the ISP 1761 we need */
pci_mem_phy0 = pci_resource_start(dev, 3);
memlength = pci_resource_len(dev, 3);
if (memlength < 0xffff) {
printk(KERN_ERR "memory length for this resource is wrong\n");
ret_status = -ENOMEM;
goto cleanup2;
}
if (!request_mem_region(pci_mem_phy0, memlength, "ISP-PCI")) {
printk(KERN_ERR "host controller already in use\n");
ret_status = -EBUSY;
goto cleanup2;
}
/* map available memory */
chip_addr = ioremap_nocache(pci_mem_phy0,memlength);
if (!chip_addr) {
printk(KERN_ERR "Error ioremap failed\n");
ret_status = -ENOMEM;
goto cleanup3;
}
/* 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) & 0x0000ffff;
retry_count--;
}
iounmap(chip_addr);
/* 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) {
dev_err(&dev->dev, "scratch register mismatch %x\n", reg_data);
ret_status = -ENOMEM;
goto cleanup3;
}
pci_set_master(dev);
/* configure PLX PCI chip to pass interrupts */
#define PLX_INT_CSR_REG 0x68
reg_data = readl(iobase + PLX_INT_CSR_REG);
reg_data |= 0x900;
writel(reg_data, iobase + PLX_INT_CSR_REG);
dev->dev.dma_mask = NULL;
hcd = isp1760_register(pci_mem_phy0, memlength, dev->irq,
IRQF_SHARED | IRQF_DISABLED, &dev->dev, dev_name(&dev->dev),
devflags);
if (IS_ERR(hcd)) {
ret_status = -ENODEV;
goto cleanup3;
}
/* done with PLX IO access */
iounmap(iobase);
release_mem_region(nxp_pci_io_base, iolength);
pci_set_drvdata(dev, hcd);
return 0;
cleanup3:
release_mem_region(pci_mem_phy0, memlength);
cleanup2:
iounmap(iobase);
cleanup1:
release_mem_region(nxp_pci_io_base, iolength);
return ret_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);
}
static void isp1761_pci_shutdown(struct pci_dev *dev)
{
printk(KERN_ERR "ips1761_pci_shutdown\n");
}
static const struct pci_device_id isp1760_plx [] = {
{
.class = PCI_CLASS_BRIDGE_OTHER << 8,
.class_mask = ~0,
.vendor = PCI_VENDOR_ID_PLX,
.device = 0x5406,
.subvendor = PCI_VENDOR_ID_PLX,
.subdevice = 0x9054,
},
{ }
};
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 __devinit isp1760_plat_probe(struct platform_device *pdev)
{
int ret = 0;
struct usb_hcd *hcd;
struct resource *mem_res;
struct resource *irq_res;
resource_size_t mem_size;
struct isp1760_platform_data *priv = pdev->dev.platform_data;
unsigned int devflags = 0;
unsigned long irqflags = IRQF_SHARED | IRQF_DISABLED;
mem_res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
if (!mem_res) {
pr_warning("isp1760: Memory resource not available\n");
ret = -ENODEV;
goto out;
}
mem_size = resource_size(mem_res);
if (!request_mem_region(mem_res->start, mem_size, "isp1760")) {
pr_warning("isp1760: Cannot reserve the memory resource\n");
ret = -EBUSY;
goto out;
}
irq_res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
if (!irq_res) {
pr_warning("isp1760: IRQ resource not available\n");
return -ENODEV;
}
irqflags |= irq_res->flags & IRQF_TRIGGER_MASK;
if (priv) {
if (priv->is_isp1761)
devflags |= ISP1760_FLAG_ISP1761;
if (priv->bus_width_16)
devflags |= ISP1760_FLAG_BUS_WIDTH_16;
if (priv->port1_otg)
devflags |= ISP1760_FLAG_OTG_EN;
if (priv->analog_oc)
devflags |= ISP1760_FLAG_ANALOG_OC;
if (priv->dack_polarity_high)
devflags |= ISP1760_FLAG_DACK_POL_HIGH;
if (priv->dreq_polarity_high)
devflags |= ISP1760_FLAG_DREQ_POL_HIGH;
}
hcd = isp1760_register(mem_res->start, mem_size, irq_res->start,
irqflags, &pdev->dev, dev_name(&pdev->dev), devflags);
if (IS_ERR(hcd)) {
pr_warning("isp1760: Failed to register the HCD device\n");
ret = -ENODEV;
goto cleanup;
}
pr_info("ISP1760 USB device initialised\n");
return ret;
cleanup:
release_mem_region(mem_res->start, mem_size);
out:
return ret;
}
static int __devexit isp1760_plat_remove(struct platform_device *pdev)
{
struct resource *mem_res;
resource_size_t mem_size;
mem_res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
mem_size = resource_size(mem_res);
release_mem_region(mem_res->start, mem_size);
return 0;
}
static struct platform_driver isp1760_plat_driver = {
.probe = isp1760_plat_probe,
.remove = __devexit_p(isp1760_plat_remove),
.driver = {
.name = "isp1760",
},
};
static int __init isp1760_init(void)
{
int ret, any_ret = -ENODEV;
init_kmem_once();
ret = platform_driver_register(&isp1760_plat_driver);
if (!ret)
any_ret = 0;
#ifdef CONFIG_PPC_OF
ret = of_register_platform_driver(&isp1760_of_driver);
if (!ret)
any_ret = 0;
#endif
#ifdef CONFIG_PCI
ret = pci_register_driver(&isp1761_pci_driver);
if (!ret)
any_ret = 0;
#endif
if (any_ret)
deinit_kmem_cache();
return any_ret;
}
module_init(isp1760_init);
static void __exit isp1760_exit(void)
{
platform_driver_unregister(&isp1760_plat_driver);
#ifdef CONFIG_PPC_OF
of_unregister_platform_driver(&isp1760_of_driver);
#endif
#ifdef CONFIG_PCI
pci_unregister_driver(&isp1761_pci_driver);
#endif
deinit_kmem_cache();
}
module_exit(isp1760_exit);
