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linux/drivers/usb/host/ehci-orion.c
Alan Stern 3a31155cff USB: EHCI: suppress unwanted error messages 
This patch (as1096) fixes an annoying problem: When a full-speed or
low-speed device is plugged into an EHCI controller, it fails to
enumerate at high speed and then is handed over to the companion
controller.  But usbcore logs a misleading and unwanted error message
when the high-speed enumeration fails.

The patch adds a new HCD method, port_handed_over, which asks whether
a port has been handed over to a companion controller.  If it has, the
error message is suppressed.

Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
CC: David Brownell <david-b@pacbell.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2008-05-29 13:59:03 -07:00

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/*
* drivers/usb/host/ehci-orion.c
*
* Tzachi Perelstein <tzachi@marvell.com>
*
* This file is licensed under the terms of the GNU General Public
* License version 2. This program is licensed "as is" without any
* warranty of any kind, whether express or implied.
*/
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/mbus.h>
#include <asm/plat-orion/ehci-orion.h>
#define rdl(off) __raw_readl(hcd->regs + (off))
#define wrl(off, val) __raw_writel((val), hcd->regs + (off))
#define USB_CMD 0x140
#define USB_MODE 0x1a8
#define USB_CAUSE 0x310
#define USB_MASK 0x314
#define USB_WINDOW_CTRL(i) (0x320 + ((i) << 4))
#define USB_WINDOW_BASE(i) (0x324 + ((i) << 4))
#define USB_IPG 0x360
#define USB_PHY_PWR_CTRL 0x400
#define USB_PHY_TX_CTRL 0x420
#define USB_PHY_RX_CTRL 0x430
#define USB_PHY_IVREF_CTRL 0x440
#define USB_PHY_TST_GRP_CTRL 0x450
/*
* Implement Orion USB controller specification guidelines
*/
static void orion_usb_setup(struct usb_hcd *hcd)
{
/*
* Clear interrupt cause and mask
*/
wrl(USB_CAUSE, 0);
wrl(USB_MASK, 0);
/*
* Reset controller
*/
wrl(USB_CMD, rdl(USB_CMD) | 0x2);
while (rdl(USB_CMD) & 0x2);
/*
* GL# USB-10: Set IPG for non start of frame packets
* Bits[14:8]=0xc
*/
wrl(USB_IPG, (rdl(USB_IPG) & ~0x7f00) | 0xc00);
/*
* GL# USB-9: USB 2.0 Power Control
* BG_VSEL[7:6]=0x1
*/
wrl(USB_PHY_PWR_CTRL, (rdl(USB_PHY_PWR_CTRL) & ~0xc0)| 0x40);
/*
* GL# USB-1: USB PHY Tx Control - force calibration to '8'
* TXDATA_BLOCK_EN[21]=0x1, EXT_RCAL_EN[13]=0x1, IMP_CAL[6:3]=0x8
*/
wrl(USB_PHY_TX_CTRL, (rdl(USB_PHY_TX_CTRL) & ~0x78) | 0x202040);
/*
* GL# USB-3 GL# USB-9: USB PHY Rx Control
* RXDATA_BLOCK_LENGHT[31:30]=0x3, EDGE_DET_SEL[27:26]=0,
* CDR_FASTLOCK_EN[21]=0, DISCON_THRESHOLD[9:8]=0, SQ_THRESH[7:4]=0x1
*/
wrl(USB_PHY_RX_CTRL, (rdl(USB_PHY_RX_CTRL) & ~0xc2003f0) | 0xc0000010);
/*
* GL# USB-3 GL# USB-9: USB PHY IVREF Control
* PLLVDD12[1:0]=0x2, RXVDD[5:4]=0x3, Reserved[19]=0
*/
wrl(USB_PHY_IVREF_CTRL, (rdl(USB_PHY_IVREF_CTRL) & ~0x80003 ) | 0x32);
/*
* GL# USB-3 GL# USB-9: USB PHY Test Group Control
* REG_FIFO_SQ_RST[15]=0
*/
wrl(USB_PHY_TST_GRP_CTRL, rdl(USB_PHY_TST_GRP_CTRL) & ~0x8000);
/*
* Stop and reset controller
*/
wrl(USB_CMD, rdl(USB_CMD) & ~0x1);
wrl(USB_CMD, rdl(USB_CMD) | 0x2);
while (rdl(USB_CMD) & 0x2);
/*
* GL# USB-5 Streaming disable REG_USB_MODE[4]=1
* TBD: This need to be done after each reset!
* GL# USB-4 Setup USB Host mode
*/
wrl(USB_MODE, 0x13);
}
static int ehci_orion_setup(struct usb_hcd *hcd)
{
struct ehci_hcd *ehci = hcd_to_ehci(hcd);
int retval;
retval = ehci_halt(ehci);
if (retval)
return retval;
/*
* data structure init
*/
retval = ehci_init(hcd);
if (retval)
return retval;
hcd->has_tt = 1;
ehci_reset(ehci);
ehci_port_power(ehci, 0);
return retval;
}
static const struct hc_driver ehci_orion_hc_driver = {
.description = hcd_name,
.product_desc = "Marvell Orion EHCI",
.hcd_priv_size = sizeof(struct ehci_hcd),
/*
* generic hardware linkage
*/
.irq = ehci_irq,
.flags = HCD_MEMORY | HCD_USB2,
/*
* basic lifecycle operations
*/
.reset = ehci_orion_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,
/*
* scheduling support
*/
.get_frame_number = ehci_get_frame,
/*
* root hub support
*/
.hub_status_data = ehci_hub_status_data,
.hub_control = ehci_hub_control,
.bus_suspend = ehci_bus_suspend,
.bus_resume = ehci_bus_resume,
.relinquish_port = ehci_relinquish_port,
.port_handed_over = ehci_port_handed_over,
};
static void __init
ehci_orion_conf_mbus_windows(struct usb_hcd *hcd,
struct mbus_dram_target_info *dram)
{
int i;
for (i = 0; i < 4; i++) {
wrl(USB_WINDOW_CTRL(i), 0);
wrl(USB_WINDOW_BASE(i), 0);
}
for (i = 0; i < dram->num_cs; i++) {
struct mbus_dram_window *cs = dram->cs + i;
wrl(USB_WINDOW_CTRL(i), ((cs->size - 1) & 0xffff0000) |
(cs->mbus_attr << 8) |
(dram->mbus_dram_target_id << 4) | 1);
wrl(USB_WINDOW_BASE(i), cs->base);
}
}
static int __init ehci_orion_drv_probe(struct platform_device *pdev)
{
struct orion_ehci_data *pd = pdev->dev.platform_data;
struct resource *res;
struct usb_hcd *hcd;
struct ehci_hcd *ehci;
void __iomem *regs;
int irq, err;
if (usb_disabled())
return -ENODEV;
pr_debug("Initializing Orion-SoC USB Host Controller\n");
irq = platform_get_irq(pdev, 0);
if (irq <= 0) {
dev_err(&pdev->dev,
"Found HC with no IRQ. Check %s setup!\n",
pdev->dev.bus_id);
err = -ENODEV;
goto err1;
}
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
if (!res) {
dev_err(&pdev->dev,
"Found HC with no register addr. Check %s setup!\n",
pdev->dev.bus_id);
err = -ENODEV;
goto err1;
}
if (!request_mem_region(res->start, res->end - res->start + 1,
ehci_orion_hc_driver.description)) {
dev_dbg(&pdev->dev, "controller already in use\n");
err = -EBUSY;
goto err1;
}
regs = ioremap(res->start, res->end - res->start + 1);
if (regs == NULL) {
dev_dbg(&pdev->dev, "error mapping memory\n");
err = -EFAULT;
goto err2;
}
hcd = usb_create_hcd(&ehci_orion_hc_driver,
&pdev->dev, pdev->dev.bus_id);
if (!hcd) {
err = -ENOMEM;
goto err3;
}
hcd->rsrc_start = res->start;
hcd->rsrc_len = res->end - res->start + 1;
hcd->regs = regs;
ehci = hcd_to_ehci(hcd);
ehci->caps = hcd->regs + 0x100;
ehci->regs = hcd->regs + 0x100 +
HC_LENGTH(ehci_readl(ehci, &ehci->caps->hc_capbase));
ehci->hcs_params = ehci_readl(ehci, &ehci->caps->hcs_params);
hcd->has_tt = 1;
ehci->sbrn = 0x20;
/*
* (Re-)program MBUS remapping windows if we are asked to.
*/
if (pd != NULL && pd->dram != NULL)
ehci_orion_conf_mbus_windows(hcd, pd->dram);
/*
* setup Orion USB controller
*/
orion_usb_setup(hcd);
err = usb_add_hcd(hcd, irq, IRQF_SHARED | IRQF_DISABLED);
if (err)
goto err4;
return 0;
err4:
usb_put_hcd(hcd);
err3:
iounmap(regs);
err2:
release_mem_region(res->start, res->end - res->start + 1);
err1:
dev_err(&pdev->dev, "init %s fail, %d\n",
pdev->dev.bus_id, err);
return err;
}
static int __exit ehci_orion_drv_remove(struct platform_device *pdev)
{
struct usb_hcd *hcd = platform_get_drvdata(pdev);
usb_remove_hcd(hcd);
iounmap(hcd->regs);
release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
usb_put_hcd(hcd);
return 0;
}
MODULE_ALIAS("platform:orion-ehci");
static struct platform_driver ehci_orion_driver = {
.probe = ehci_orion_drv_probe,
.remove = __exit_p(ehci_orion_drv_remove),
.shutdown = usb_hcd_platform_shutdown,
.driver.name = "orion-ehci",
};
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