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linux/drivers/usb/host/ehci-orion.c
Lennert Buytenhek 92aecfa955 ehci-orion: mbus decode window support 
Make it possible to pass mbus_dram_target_info to the ehci-orion
driver via the platform data, make the ehci-orion driver program
the window registers based on this data if it is passed in, and
make the Orion platform setup code use this method instead of
programming the EHCI mbus window registers by hand.

Signed-off-by: Lennert Buytenhek <buytenh@marvell.com>
Reviewed-by: Tzachi Perelstein <tzachi@marvell.com>
Acked-by: Russell King <rmk+kernel@arm.linux.org.uk>
Signed-off-by: Nicolas Pitre <nico@marvell.com>
2008-03-27 14:51:39 -04:00

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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/arch/orion.h>
#include <asm/arch/platform.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;
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,
#ifdef CONFIG_PM
.suspend = ehci_bus_suspend,
.resume = ehci_bus_resume,
#endif
.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,
};
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);
ehci->is_tdi_rh_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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