static int usb_hcd_pnx4008_remove(struct platform_device *pdev)
{
struct usb_hcd *hcd = platform_get_drvdata(pdev);
usb_remove_hcd(hcd);
pnx4008_stop_hc();
release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
usb_put_hcd(hcd);
pnx4008_unset_usb_bits();
clk_disable(usb_clk);
clk_put(usb_clk);
i2c_del_driver(&isp1301_driver);
platform_set_drvdata(pdev, NULL);
return 0;
}
static int __devinit usb_hcd_pnx4008_probe(struct platform_device *pdev)
{
struct usb_hcd *hcd = 0;
struct ohci_hcd *ohci;
const struct hc_driver *driver = &ohci_pnx4008_hc_driver;
struct i2c_adapter *i2c_adap;
struct i2c_board_info i2c_info;
int ret = 0, irq;
dev_dbg(&pdev->dev, "%s: " DRIVER_DESC " (pnx4008)\n", hcd_name);
if (usb_disabled()) {
err("USB is disabled");
ret = -ENODEV;
goto out;
}
if (pdev->num_resources != 2
|| pdev->resource[0].flags != IORESOURCE_MEM
|| pdev->resource[1].flags != IORESOURCE_IRQ) {
err("Invalid resource configuration");
ret = -ENODEV;
goto out;
}
/* Enable AHB slave USB clock, needed for further USB clock control */
__raw_writel(USB_SLAVE_HCLK_EN | (1 << 19), USB_CTRL);
ret = i2c_add_driver(&isp1301_driver);
if (ret < 0) {
err("failed to add ISP1301 driver");
goto out;
}
i2c_adap = i2c_get_adapter(2);
memset(&i2c_info, 0, sizeof(struct i2c_board_info));
strlcpy(i2c_info.type, "isp1301_pnx", I2C_NAME_SIZE);
isp1301_i2c_client = i2c_new_probed_device(i2c_adap, &i2c_info,
normal_i2c, NULL);
i2c_put_adapter(i2c_adap);
if (!isp1301_i2c_client) {
err("failed to connect I2C to ISP1301 USB Transceiver");
ret = -ENODEV;
goto out_i2c_driver;
}
isp1301_configure();
/* Enable USB PLL */
usb_clk = clk_get(&pdev->dev, "ck_pll5");
if (IS_ERR(usb_clk)) {
err("failed to acquire USB PLL");
ret = PTR_ERR(usb_clk);
goto out1;
}
ret = clk_enable(usb_clk);
if (ret < 0) {
err("failed to start USB PLL");
goto out2;
}
ret = clk_set_rate(usb_clk, 48000);
if (ret < 0) {
err("failed to set USB clock rate");
goto out3;
}
__raw_writel(__raw_readl(USB_CTRL) | USB_HOST_NEED_CLK_EN, USB_CTRL);
/* Set to enable all needed USB clocks */
__raw_writel(USB_CLOCK_MASK, USB_OTG_CLK_CTRL);
while ((__raw_readl(USB_OTG_CLK_STAT) & USB_CLOCK_MASK) !=
USB_CLOCK_MASK) ;
hcd = usb_create_hcd (driver, &pdev->dev, dev_name(&pdev->dev));
if (!hcd) {
err("Failed to allocate HC buffer");
ret = -ENOMEM;
goto out3;
}
/* Set all USB bits in the Start Enable register */
pnx4008_set_usb_bits();
hcd->rsrc_start = pdev->resource[0].start;
hcd->rsrc_len = pdev->resource[0].end - pdev->resource[0].start + 1;
if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len, hcd_name)) {
dev_dbg(&pdev->dev, "request_mem_region failed\n");
ret = -ENOMEM;
goto out4;
}
hcd->regs = (void __iomem *)pdev->resource[0].start;
irq = platform_get_irq(pdev, 0);
if (irq < 0) {
ret = -ENXIO;
goto out4;
}
pnx4008_start_hc();
platform_set_drvdata(pdev, hcd);
ohci = hcd_to_ohci(hcd);
ohci_hcd_init(ohci);
dev_info(&pdev->dev, "at 0x%p, irq %d\n", hcd->regs, hcd->irq);
ret = usb_add_hcd(hcd, irq, 0);
if (ret == 0)
return ret;
pnx4008_stop_hc();
out4:
pnx4008_unset_usb_bits();
usb_put_hcd(hcd);
out3:
clk_disable(usb_clk);
out2:
clk_put(usb_clk);
out1:
i2c_unregister_device(isp1301_i2c_client);
isp1301_i2c_client = NULL;
out_i2c_driver:
i2c_del_driver(&isp1301_driver);
out:
return ret;
}
