1 files changed, 560 insertions, 0 deletions

diff --git a/drivers/usb/host/ohci-omap.c b/drivers/usb/host/ohci-omap.c
new file mode 100644
index 00000000000..90285f180f8
--- /dev/null
+++ b/drivers/usb/host/ohci-omap.c
@@ -0,0 +1,560 @@
+/*
+ * OHCI HCD (Host Controller Driver) for USB.
+ *
+ * (C) Copyright 1999 Roman Weissgaerber <weissg@vienna.at>
+ * (C) Copyright 2000-2005 David Brownell
+ * (C) Copyright 2002 Hewlett-Packard Company
+ * 
+ * OMAP Bus Glue
+ *
+ * Modified for OMAP by Tony Lindgren <tony@atomide.com>
+ * Based on the 2.4 OMAP OHCI driver originally done by MontaVista Software Inc.
+ * and on ohci-sa1111.c by Christopher Hoover <ch@hpl.hp.com>
+ *
+ * This file is licenced under the GPL.
+ */
+
+#include <asm/hardware.h>
+#include <asm/io.h>
+#include <asm/mach-types.h>
+
+#include <asm/arch/hardware.h>
+#include <asm/arch/mux.h>
+#include <asm/arch/irqs.h>
+#include <asm/arch/gpio.h>
+#include <asm/arch/fpga.h>
+#include <asm/arch/usb.h>
+#include <asm/hardware/clock.h>
+
+
+/* OMAP-1510 OHCI has its own MMU for DMA */
+#define OMAP1510_LB_MEMSIZE	32	/* Should be same as SDRAM size */
+#define OMAP1510_LB_CLOCK_DIV	0xfffec10c
+#define OMAP1510_LB_MMU_CTL	0xfffec208
+#define OMAP1510_LB_MMU_LCK	0xfffec224
+#define OMAP1510_LB_MMU_LD_TLB	0xfffec228
+#define OMAP1510_LB_MMU_CAM_H	0xfffec22c
+#define OMAP1510_LB_MMU_CAM_L	0xfffec230
+#define OMAP1510_LB_MMU_RAM_H	0xfffec234
+#define OMAP1510_LB_MMU_RAM_L	0xfffec238
+
+
+#ifndef CONFIG_ARCH_OMAP
+#error "This file is OMAP bus glue.  CONFIG_OMAP must be defined."
+#endif
+
+#ifdef CONFIG_TPS65010
+#include <asm/arch/tps65010.h>
+#else
+
+#define LOW	0
+#define HIGH	1
+
+#define GPIO1	1
+
+static inline int tps65010_set_gpio_out_value(unsigned gpio, unsigned value)
+{
+	return 0;
+}
+
+#endif
+
+extern int usb_disabled(void);
+extern int ocpi_enable(void);
+
+static struct clk *usb_host_ck;
+
+static void omap_ohci_clock_power(int on)
+{
+	if (on) {
+		clk_enable(usb_host_ck);
+		/* guesstimate for T5 == 1x 32K clock + APLL lock time */
+		udelay(100);
+	} else {
+		clk_disable(usb_host_ck);
+	}
+}
+
+/*
+ * Board specific gang-switched transceiver power on/off.
+ * NOTE:  OSK supplies power from DC, not battery.
+ */
+static int omap_ohci_transceiver_power(int on)
+{
+	if (on) {
+		if (machine_is_omap_innovator() && cpu_is_omap1510())
+			fpga_write(fpga_read(INNOVATOR_FPGA_CAM_USB_CONTROL)
+				| ((1 << 5/*usb1*/) | (1 << 3/*usb2*/)), 
+			       INNOVATOR_FPGA_CAM_USB_CONTROL);
+		else if (machine_is_omap_osk())
+			tps65010_set_gpio_out_value(GPIO1, LOW);
+	} else {
+		if (machine_is_omap_innovator() && cpu_is_omap1510())
+			fpga_write(fpga_read(INNOVATOR_FPGA_CAM_USB_CONTROL)
+				& ~((1 << 5/*usb1*/) | (1 << 3/*usb2*/)), 
+			       INNOVATOR_FPGA_CAM_USB_CONTROL);
+		else if (machine_is_omap_osk())
+			tps65010_set_gpio_out_value(GPIO1, HIGH);
+	}
+
+	return 0;
+}
+
+/*
+ * OMAP-1510 specific Local Bus clock on/off
+ */
+static int omap_1510_local_bus_power(int on)
+{
+	if (on) {
+		omap_writel((1 << 1) | (1 << 0), OMAP1510_LB_MMU_CTL);
+		udelay(200);
+	} else {
+		omap_writel(0, OMAP1510_LB_MMU_CTL);
+	}
+
+	return 0;
+}
+
+/*
+ * OMAP-1510 specific Local Bus initialization
+ * NOTE: This assumes 32MB memory size in OMAP1510LB_MEMSIZE.
+ *       See also arch/mach-omap/memory.h for __virt_to_dma() and 
+ *       __dma_to_virt() which need to match with the physical 
+ *       Local Bus address below.
+ */
+static int omap_1510_local_bus_init(void)
+{
+	unsigned int tlb;
+	unsigned long lbaddr, physaddr;
+
+	omap_writel((omap_readl(OMAP1510_LB_CLOCK_DIV) & 0xfffffff8) | 0x4, 
+	       OMAP1510_LB_CLOCK_DIV);
+
+	/* Configure the Local Bus MMU table */
+	for (tlb = 0; tlb < OMAP1510_LB_MEMSIZE; tlb++) {
+		lbaddr = tlb * 0x00100000 + OMAP1510_LB_OFFSET;
+		physaddr = tlb * 0x00100000 + PHYS_OFFSET;
+		omap_writel((lbaddr & 0x0fffffff) >> 22, OMAP1510_LB_MMU_CAM_H);
+		omap_writel(((lbaddr & 0x003ffc00) >> 6) | 0xc, 
+		       OMAP1510_LB_MMU_CAM_L);
+		omap_writel(physaddr >> 16, OMAP1510_LB_MMU_RAM_H);
+		omap_writel((physaddr & 0x0000fc00) | 0x300, OMAP1510_LB_MMU_RAM_L);
+		omap_writel(tlb << 4, OMAP1510_LB_MMU_LCK);
+		omap_writel(0x1, OMAP1510_LB_MMU_LD_TLB);
+	}
+
+	/* Enable the walking table */
+	omap_writel(omap_readl(OMAP1510_LB_MMU_CTL) | (1 << 3), OMAP1510_LB_MMU_CTL);
+	udelay(200);
+
+	return 0;
+}
+
+#ifdef	CONFIG_USB_OTG
+
+static void start_hnp(struct ohci_hcd *ohci)
+{
+	const unsigned	port = ohci_to_hcd(ohci)->self.otg_port - 1;
+	unsigned long	flags;
+
+	otg_start_hnp(ohci->transceiver);
+
+	local_irq_save(flags);
+	ohci->transceiver->state = OTG_STATE_A_SUSPEND;
+	writel (RH_PS_PSS, &ohci->regs->roothub.portstatus [port]);
+	OTG_CTRL_REG &= ~OTG_A_BUSREQ;
+	local_irq_restore(flags);
+}
+
+#endif
+
+/*-------------------------------------------------------------------------*/
+
+static int omap_start_hc(struct ohci_hcd *ohci, struct platform_device *pdev)
+{
+	struct omap_usb_config	*config = pdev->dev.platform_data;
+	int			need_transceiver = (config->otg != 0);
+	int			ret;
+
+	dev_dbg(&pdev->dev, "starting USB Controller\n");
+
+	if (config->otg) {
+		ohci_to_hcd(ohci)->self.otg_port = config->otg;
+		/* default/minimum OTG power budget:  8 mA */
+		ohci->power_budget = 8;
+	}
+
+	/* boards can use OTG transceivers in non-OTG modes */
+	need_transceiver = need_transceiver
+			|| machine_is_omap_h2() || machine_is_omap_h3();
+
+	if (cpu_is_omap16xx())
+		ocpi_enable();
+
+#ifdef	CONFIG_ARCH_OMAP_OTG
+	if (need_transceiver) {
+		ohci->transceiver = otg_get_transceiver();
+		if (ohci->transceiver) {
+			int	status = otg_set_host(ohci->transceiver,
+						&ohci_to_hcd(ohci)->self);
+			dev_dbg(&pdev->dev, "init %s transceiver, status %d\n",
+					ohci->transceiver->label, status);
+			if (status) {
+				if (ohci->transceiver)
+					put_device(ohci->transceiver->dev);
+				return status;
+			}
+		} else {
+			dev_err(&pdev->dev, "can't find transceiver\n");
+			return -ENODEV;
+		}
+	}
+#endif
+
+	omap_ohci_clock_power(1);
+
+	if (cpu_is_omap1510()) {
+		omap_1510_local_bus_power(1);
+		omap_1510_local_bus_init();
+	}
+
+	if ((ret = ohci_init(ohci)) < 0)
+		return ret;
+
+	/* board-specific power switching and overcurrent support */
+	if (machine_is_omap_osk() || machine_is_omap_innovator()) {
+		u32	rh = roothub_a (ohci);
+
+		/* power switching (ganged by default) */
+		rh &= ~RH_A_NPS;
+
+		/* TPS2045 switch for internal transceiver (port 1) */
+		if (machine_is_omap_osk()) {
+			ohci->power_budget = 250;
+
+			rh &= ~RH_A_NOCP;
+
+			/* gpio9 for overcurrent detction */
+			omap_cfg_reg(W8_1610_GPIO9);
+			omap_request_gpio(9);
+			omap_set_gpio_direction(9, 1 /* IN */);
+
+			/* for paranoia's sake:  disable USB.PUEN */
+			omap_cfg_reg(W4_USB_HIGHZ);
+		}
+		ohci_writel(ohci, rh, &ohci->regs->roothub.a);
+		distrust_firmware = 0;
+	}
+
+	/* FIXME khubd hub requests should manage power switching */
+	omap_ohci_transceiver_power(1);
+
+	/* board init will have already handled HMC and mux setup.
+	 * any external transceiver should already be initialized
+	 * too, so all configured ports use the right signaling now.
+	 */
+
+	return 0;
+}
+
+static void omap_stop_hc(struct platform_device *pdev)
+{
+	dev_dbg(&pdev->dev, "stopping USB Controller\n");
+	omap_ohci_clock_power(0);
+}
+
+
+/*-------------------------------------------------------------------------*/
+
+void usb_hcd_omap_remove (struct usb_hcd *, struct platform_device *);
+
+/* configure so an HC device and id are always provided */
+/* always called with process context; sleeping is OK */
+
+
+/**
+ * usb_hcd_omap_probe - initialize OMAP-based HCDs
+ * Context: !in_interrupt()
+ *
+ * Allocates basic resources for this USB host controller, and
+ * then invokes the start() method for the HCD associated with it
+ * through the hotplug entry's driver_data.
+ */
+int usb_hcd_omap_probe (const struct hc_driver *driver,
+			  struct platform_device *pdev)
+{
+	int retval;
+	struct usb_hcd *hcd = 0;
+	struct ohci_hcd *ohci;
+
+	if (pdev->num_resources != 2) {
+		printk(KERN_ERR "hcd probe: invalid num_resources: %i\n", 
+		       pdev->num_resources);
+		return -ENODEV;
+	}
+
+	if (pdev->resource[0].flags != IORESOURCE_MEM 
+			|| pdev->resource[1].flags != IORESOURCE_IRQ) {
+		printk(KERN_ERR "hcd probe: invalid resource type\n");
+		return -ENODEV;
+	}
+
+	usb_host_ck = clk_get(0, "usb_hhc_ck");
+	if (IS_ERR(usb_host_ck))
+		return PTR_ERR(usb_host_ck);
+
+	hcd = usb_create_hcd (driver, &pdev->dev, pdev->dev.bus_id);
+	if (!hcd) {
+		retval = -ENOMEM;
+		goto err0;
+	}
+	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");
+		retval = -EBUSY;
+		goto err1;
+	}
+
+	hcd->regs = (void __iomem *) (int) IO_ADDRESS(hcd->rsrc_start);
+
+	ohci = hcd_to_ohci(hcd);
+	ohci_hcd_init(ohci);
+
+	retval = omap_start_hc(ohci, pdev);
+	if (retval < 0)
+		goto err2;
+
+	retval = usb_add_hcd(hcd, platform_get_irq(pdev, 0), SA_INTERRUPT);
+	if (retval == 0)
+		return retval;
+
+	omap_stop_hc(pdev);
+err2:
+	release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
+err1:
+	usb_put_hcd(hcd);
+err0:
+	clk_put(usb_host_ck);
+	return retval;
+}
+
+
+/* may be called with controller, bus, and devices active */
+
+/**
+ * usb_hcd_omap_remove - shutdown processing for OMAP-based HCDs
+ * @dev: USB Host Controller being removed
+ * Context: !in_interrupt()
+ *
+ * Reverses the effect of usb_hcd_omap_probe(), first invoking
+ * the HCD's stop() method.  It is always called from a thread
+ * context, normally "rmmod", "apmd", or something similar.
+ *
+ */
+void usb_hcd_omap_remove (struct usb_hcd *hcd, struct platform_device *pdev)
+{
+	usb_remove_hcd(hcd);
+	if (machine_is_omap_osk())
+		omap_free_gpio(9);
+	omap_stop_hc(pdev);
+	release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
+	usb_put_hcd(hcd);
+	clk_put(usb_host_ck);
+}
+
+/*-------------------------------------------------------------------------*/
+
+static int __devinit
+ohci_omap_start (struct usb_hcd *hcd)
+{
+	struct omap_usb_config *config;
+	struct ohci_hcd	*ohci = hcd_to_ohci (hcd);
+	int		ret;
+
+	config = hcd->self.controller->platform_data;
+	if (config->otg || config->rwc)
+		writel(OHCI_CTRL_RWC, &ohci->regs->control);
+
+	if ((ret = ohci_run (ohci)) < 0) {
+		dev_err(hcd->self.controller, "can't start\n");
+		ohci_stop (hcd);
+		return ret;
+	}
+	return 0;
+}
+
+/*-------------------------------------------------------------------------*/
+
+static const struct hc_driver ohci_omap_hc_driver = {
+	.description =		hcd_name,
+	.product_desc =		"OMAP OHCI",
+	.hcd_priv_size =	sizeof(struct ohci_hcd),
+
+	/*
+	 * generic hardware linkage
+	 */
+	.irq =			ohci_irq,
+	.flags =		HCD_USB11 | HCD_MEMORY,
+
+	/*
+	 * basic lifecycle operations
+	 */
+	.start =		ohci_omap_start,
+	.stop =			ohci_stop,
+
+	/*
+	 * managing i/o requests and associated device resources
+	 */
+	.urb_enqueue =		ohci_urb_enqueue,
+	.urb_dequeue =		ohci_urb_dequeue,
+	.endpoint_disable =	ohci_endpoint_disable,
+
+	/*
+	 * scheduling support
+	 */
+	.get_frame_number =	ohci_get_frame,
+
+	/*
+	 * root hub support
+	 */
+	.hub_status_data =	ohci_hub_status_data,
+	.hub_control =		ohci_hub_control,
+#ifdef	CONFIG_USB_SUSPEND
+	.hub_suspend =		ohci_hub_suspend,
+	.hub_resume =		ohci_hub_resume,
+#endif
+	.start_port_reset =	ohci_start_port_reset,
+};
+
+/*-------------------------------------------------------------------------*/
+
+static int ohci_hcd_omap_drv_probe(struct device *dev)
+{
+	return usb_hcd_omap_probe(&ohci_omap_hc_driver,
+				to_platform_device(dev));
+}
+
+static int ohci_hcd_omap_drv_remove(struct device *dev)
+{
+	struct platform_device	*pdev = to_platform_device(dev);
+	struct usb_hcd		*hcd = dev_get_drvdata(dev);
+	struct ohci_hcd		*ohci = hcd_to_ohci (hcd);
+
+	usb_hcd_omap_remove(hcd, pdev);
+	if (ohci->transceiver) {
+		(void) otg_set_host(ohci->transceiver, 0);
+		put_device(ohci->transceiver->dev);
+	}
+	dev_set_drvdata(dev, NULL);
+
+	return 0;
+}
+
+/*-------------------------------------------------------------------------*/
+
+#ifdef	CONFIG_PM
+
+/* states match PCI usage, always suspending the root hub except that
+ * 4 ~= D3cold (ACPI D3) with clock off (resume sees reset).
+ */
+
+static int ohci_omap_suspend(struct device *dev, u32 state, u32 level)
+{
+	struct ohci_hcd	*ohci = hcd_to_ohci(dev_get_drvdata(dev));
+	int		status = -EINVAL;
+
+	if (level != SUSPEND_POWER_DOWN)
+		return 0;
+	if (state <= dev->power.power_state)
+		return 0;
+
+	dev_dbg(dev, "suspend to %d\n", state);
+	down(&ohci_to_hcd(ohci)->self.root_hub->serialize);
+	status = ohci_hub_suspend(ohci_to_hcd(ohci));
+	if (status == 0) {
+		if (state >= 4) {
+			omap_ohci_clock_power(0);
+			ohci_to_hcd(ohci)->self.root_hub->state =
+					USB_STATE_SUSPENDED;
+			state = 4;
+		}
+		ohci_to_hcd(ohci)->state = HC_STATE_SUSPENDED;
+		dev->power.power_state = state;
+	}
+	up(&ohci_to_hcd(ohci)->self.root_hub->serialize);
+	return status;
+}
+
+static int ohci_omap_resume(struct device *dev, u32 level)
+{
+	struct ohci_hcd	*ohci = hcd_to_ohci(dev_get_drvdata(dev));
+	int		status = 0;
+
+	if (level != RESUME_POWER_ON)
+		return 0;
+
+	switch (dev->power.power_state) {
+	case 0:
+		break;
+	case 4:
+		if (time_before(jiffies, ohci->next_statechange))
+			msleep(5);
+		ohci->next_statechange = jiffies;
+		omap_ohci_clock_power(1);
+		/* FALLTHROUGH */
+	default:
+		dev_dbg(dev, "resume from %d\n", dev->power.power_state);
+#ifdef	CONFIG_USB_SUSPEND
+		/* get extra cleanup even if remote wakeup isn't in use */
+		status = usb_resume_device(ohci_to_hcd(ohci)->self.root_hub);
+#else
+		down(&ohci_to_hcd(ohci)->self.root_hub->serialize);
+		status = ohci_hub_resume(ohci_to_hcd(ohci));
+		up(&ohci_to_hcd(ohci)->self.root_hub->serialize);
+#endif
+		if (status == 0)
+			dev->power.power_state = 0;
+		break;
+	}
+	return status;
+}
+
+#endif
+
+/*-------------------------------------------------------------------------*/
+
+/*
+ * Driver definition to register with the OMAP bus
+ */
+static struct device_driver ohci_hcd_omap_driver = {
+	.name		= "ohci",
+	.bus		= &platform_bus_type,
+	.probe		= ohci_hcd_omap_drv_probe,
+	.remove		= ohci_hcd_omap_drv_remove,
+#ifdef	CONFIG_PM
+	.suspend	= ohci_omap_suspend,
+	.resume		= ohci_omap_resume,
+#endif
+};
+
+static int __init ohci_hcd_omap_init (void)
+{
+	printk (KERN_DEBUG "%s: " DRIVER_INFO " (OMAP)\n", hcd_name);
+	if (usb_disabled())
+		return -ENODEV;
+
+	pr_debug("%s: block sizes: ed %Zd td %Zd\n", hcd_name,
+		sizeof (struct ed), sizeof (struct td));
+
+	return driver_register(&ohci_hcd_omap_driver);
+}
+
+static void __exit ohci_hcd_omap_cleanup (void)
+{
+	driver_unregister(&ohci_hcd_omap_driver);
+}
+
+module_init (ohci_hcd_omap_init);
+module_exit (ohci_hcd_omap_cleanup);