61c7a080a5
The following structure elements duplicate the information in 'struct device.of_node' and so are being eliminated. This patch makes all readers of these elements use device.of_node instead. (struct of_device *)->node (struct dev_archdata *)->prom_node (sparc) (struct dev_archdata *)->of_node (powerpc & microblaze) Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
286 lines
6.3 KiB
C
286 lines
6.3 KiB
C
/*
|
|
* EHCI HCD (Host Controller Driver) for USB.
|
|
*
|
|
* Bus Glue for PPC On-Chip EHCI driver on the of_platform bus
|
|
* Tested on AMCC PPC 440EPx
|
|
*
|
|
* Valentine Barshak <vbarshak@ru.mvista.com>
|
|
*
|
|
* Based on "ehci-ppc-soc.c" by Stefan Roese <sr@denx.de>
|
|
* and "ohci-ppc-of.c" by Sylvain Munaut <tnt@246tNt.com>
|
|
*
|
|
* This file is licenced under the GPL.
|
|
*/
|
|
|
|
#include <linux/signal.h>
|
|
|
|
#include <linux/of.h>
|
|
#include <linux/of_platform.h>
|
|
|
|
/* called during probe() after chip reset completes */
|
|
static int ehci_ppc_of_setup(struct usb_hcd *hcd)
|
|
{
|
|
struct ehci_hcd *ehci = hcd_to_ehci(hcd);
|
|
int retval;
|
|
|
|
retval = ehci_halt(ehci);
|
|
if (retval)
|
|
return retval;
|
|
|
|
retval = ehci_init(hcd);
|
|
if (retval)
|
|
return retval;
|
|
|
|
ehci->sbrn = 0x20;
|
|
return ehci_reset(ehci);
|
|
}
|
|
|
|
|
|
static const struct hc_driver ehci_ppc_of_hc_driver = {
|
|
.description = hcd_name,
|
|
.product_desc = "OF EHCI",
|
|
.hcd_priv_size = sizeof(struct ehci_hcd),
|
|
|
|
/*
|
|
* generic hardware linkage
|
|
*/
|
|
.irq = ehci_irq,
|
|
.flags = HCD_MEMORY | HCD_USB2,
|
|
|
|
/*
|
|
* basic lifecycle operations
|
|
*/
|
|
.reset = ehci_ppc_of_setup,
|
|
.start = ehci_run,
|
|
.stop = ehci_stop,
|
|
.shutdown = ehci_shutdown,
|
|
|
|
/*
|
|
* managing i/o requests and associated device resources
|
|
*/
|
|
.urb_enqueue = ehci_urb_enqueue,
|
|
.urb_dequeue = ehci_urb_dequeue,
|
|
.endpoint_disable = ehci_endpoint_disable,
|
|
.endpoint_reset = ehci_endpoint_reset,
|
|
|
|
/*
|
|
* scheduling support
|
|
*/
|
|
.get_frame_number = ehci_get_frame,
|
|
|
|
/*
|
|
* root hub support
|
|
*/
|
|
.hub_status_data = ehci_hub_status_data,
|
|
.hub_control = ehci_hub_control,
|
|
#ifdef CONFIG_PM
|
|
.bus_suspend = ehci_bus_suspend,
|
|
.bus_resume = ehci_bus_resume,
|
|
#endif
|
|
.relinquish_port = ehci_relinquish_port,
|
|
.port_handed_over = ehci_port_handed_over,
|
|
|
|
.clear_tt_buffer_complete = ehci_clear_tt_buffer_complete,
|
|
};
|
|
|
|
|
|
/*
|
|
* 440EPx Errata USBH_3
|
|
* Fix: Enable Break Memory Transfer (BMT) in INSNREG3
|
|
*/
|
|
#define PPC440EPX_EHCI0_INSREG_BMT (0x1 << 0)
|
|
static int __devinit
|
|
ppc44x_enable_bmt(struct device_node *dn)
|
|
{
|
|
__iomem u32 *insreg_virt;
|
|
|
|
insreg_virt = of_iomap(dn, 1);
|
|
if (!insreg_virt)
|
|
return -EINVAL;
|
|
|
|
out_be32(insreg_virt + 3, PPC440EPX_EHCI0_INSREG_BMT);
|
|
|
|
iounmap(insreg_virt);
|
|
return 0;
|
|
}
|
|
|
|
|
|
static int __devinit
|
|
ehci_hcd_ppc_of_probe(struct of_device *op, const struct of_device_id *match)
|
|
{
|
|
struct device_node *dn = op->dev.of_node;
|
|
struct usb_hcd *hcd;
|
|
struct ehci_hcd *ehci = NULL;
|
|
struct resource res;
|
|
int irq;
|
|
int rv;
|
|
|
|
struct device_node *np;
|
|
|
|
if (usb_disabled())
|
|
return -ENODEV;
|
|
|
|
dev_dbg(&op->dev, "initializing PPC-OF USB Controller\n");
|
|
|
|
rv = of_address_to_resource(dn, 0, &res);
|
|
if (rv)
|
|
return rv;
|
|
|
|
hcd = usb_create_hcd(&ehci_ppc_of_hc_driver, &op->dev, "PPC-OF USB");
|
|
if (!hcd)
|
|
return -ENOMEM;
|
|
|
|
hcd->rsrc_start = res.start;
|
|
hcd->rsrc_len = res.end - res.start + 1;
|
|
|
|
if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len, hcd_name)) {
|
|
printk(KERN_ERR "%s: request_mem_region failed\n", __FILE__);
|
|
rv = -EBUSY;
|
|
goto err_rmr;
|
|
}
|
|
|
|
irq = irq_of_parse_and_map(dn, 0);
|
|
if (irq == NO_IRQ) {
|
|
printk(KERN_ERR "%s: irq_of_parse_and_map failed\n", __FILE__);
|
|
rv = -EBUSY;
|
|
goto err_irq;
|
|
}
|
|
|
|
hcd->regs = ioremap(hcd->rsrc_start, hcd->rsrc_len);
|
|
if (!hcd->regs) {
|
|
printk(KERN_ERR "%s: ioremap failed\n", __FILE__);
|
|
rv = -ENOMEM;
|
|
goto err_ioremap;
|
|
}
|
|
|
|
ehci = hcd_to_ehci(hcd);
|
|
np = of_find_compatible_node(NULL, NULL, "ibm,usb-ohci-440epx");
|
|
if (np != NULL) {
|
|
/* claim we really affected by usb23 erratum */
|
|
if (!of_address_to_resource(np, 0, &res))
|
|
ehci->ohci_hcctrl_reg = ioremap(res.start +
|
|
OHCI_HCCTRL_OFFSET, OHCI_HCCTRL_LEN);
|
|
else
|
|
pr_debug("%s: no ohci offset in fdt\n", __FILE__);
|
|
if (!ehci->ohci_hcctrl_reg) {
|
|
pr_debug("%s: ioremap for ohci hcctrl failed\n", __FILE__);
|
|
} else {
|
|
ehci->has_amcc_usb23 = 1;
|
|
}
|
|
}
|
|
|
|
if (of_get_property(dn, "big-endian", NULL)) {
|
|
ehci->big_endian_mmio = 1;
|
|
ehci->big_endian_desc = 1;
|
|
}
|
|
if (of_get_property(dn, "big-endian-regs", NULL))
|
|
ehci->big_endian_mmio = 1;
|
|
if (of_get_property(dn, "big-endian-desc", NULL))
|
|
ehci->big_endian_desc = 1;
|
|
|
|
ehci->caps = hcd->regs;
|
|
ehci->regs = hcd->regs +
|
|
HC_LENGTH(ehci_readl(ehci, &ehci->caps->hc_capbase));
|
|
|
|
/* cache this readonly data; minimize chip reads */
|
|
ehci->hcs_params = ehci_readl(ehci, &ehci->caps->hcs_params);
|
|
|
|
if (of_device_is_compatible(dn, "ibm,usb-ehci-440epx")) {
|
|
rv = ppc44x_enable_bmt(dn);
|
|
ehci_dbg(ehci, "Break Memory Transfer (BMT) is %senabled!\n",
|
|
rv ? "NOT ": "");
|
|
}
|
|
|
|
rv = usb_add_hcd(hcd, irq, 0);
|
|
if (rv == 0)
|
|
return 0;
|
|
|
|
iounmap(hcd->regs);
|
|
err_ioremap:
|
|
irq_dispose_mapping(irq);
|
|
err_irq:
|
|
release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
|
|
|
|
if (ehci->has_amcc_usb23)
|
|
iounmap(ehci->ohci_hcctrl_reg);
|
|
err_rmr:
|
|
usb_put_hcd(hcd);
|
|
|
|
return rv;
|
|
}
|
|
|
|
|
|
static int ehci_hcd_ppc_of_remove(struct of_device *op)
|
|
{
|
|
struct usb_hcd *hcd = dev_get_drvdata(&op->dev);
|
|
struct ehci_hcd *ehci = hcd_to_ehci(hcd);
|
|
|
|
struct device_node *np;
|
|
struct resource res;
|
|
|
|
dev_set_drvdata(&op->dev, NULL);
|
|
|
|
dev_dbg(&op->dev, "stopping PPC-OF USB Controller\n");
|
|
|
|
usb_remove_hcd(hcd);
|
|
|
|
iounmap(hcd->regs);
|
|
irq_dispose_mapping(hcd->irq);
|
|
release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
|
|
|
|
/* use request_mem_region to test if the ohci driver is loaded. if so
|
|
* ensure the ohci core is operational.
|
|
*/
|
|
if (ehci->has_amcc_usb23) {
|
|
np = of_find_compatible_node(NULL, NULL, "ibm,usb-ohci-440epx");
|
|
if (np != NULL) {
|
|
if (!of_address_to_resource(np, 0, &res))
|
|
if (!request_mem_region(res.start,
|
|
0x4, hcd_name))
|
|
set_ohci_hcfs(ehci, 1);
|
|
else
|
|
release_mem_region(res.start, 0x4);
|
|
else
|
|
pr_debug("%s: no ohci offset in fdt\n", __FILE__);
|
|
of_node_put(np);
|
|
}
|
|
|
|
iounmap(ehci->ohci_hcctrl_reg);
|
|
}
|
|
usb_put_hcd(hcd);
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
static int ehci_hcd_ppc_of_shutdown(struct of_device *op)
|
|
{
|
|
struct usb_hcd *hcd = dev_get_drvdata(&op->dev);
|
|
|
|
if (hcd->driver->shutdown)
|
|
hcd->driver->shutdown(hcd);
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
static const struct of_device_id ehci_hcd_ppc_of_match[] = {
|
|
{
|
|
.compatible = "usb-ehci",
|
|
},
|
|
{},
|
|
};
|
|
MODULE_DEVICE_TABLE(of, ehci_hcd_ppc_of_match);
|
|
|
|
|
|
static struct of_platform_driver ehci_hcd_ppc_of_driver = {
|
|
.name = "ppc-of-ehci",
|
|
.match_table = ehci_hcd_ppc_of_match,
|
|
.probe = ehci_hcd_ppc_of_probe,
|
|
.remove = ehci_hcd_ppc_of_remove,
|
|
.shutdown = ehci_hcd_ppc_of_shutdown,
|
|
.driver = {
|
|
.name = "ppc-of-ehci",
|
|
.owner = THIS_MODULE,
|
|
},
|
|
};
|