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- /*
- * 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 <linux/clk.h>
- #include <linux/dma-mapping.h>
- #include <linux/err.h>
- #include <linux/gpio.h>
- #include <linux/io.h>
- #include <linux/jiffies.h>
- #include <linux/kernel.h>
- #include <linux/module.h>
- #include <linux/usb/otg.h>
- #include <linux/platform_device.h>
- #include <linux/signal.h>
- #include <linux/usb.h>
- #include <linux/usb/hcd.h>
- #include "ohci.h"
- #include <asm/io.h>
- #include <asm/mach-types.h>
- #include <mach/mux.h>
- #include <mach/hardware.h>
- #include <mach/irqs.h>
- #include <mach/usb.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
- #define DRIVER_DESC "OHCI OMAP driver"
- #ifdef CONFIG_TPS65010
- #include <linux/i2c/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 struct clk *usb_dc_ck;
- static const char hcd_name[] = "ohci-omap";
- static struct hc_driver __read_mostly ohci_omap_hc_driver;
- static void omap_ohci_clock_power(int on)
- {
- if (on) {
- clk_enable(usb_dc_ck);
- clk_enable(usb_host_ck);
- /* guesstimate for T5 == 1x 32K clock + APLL lock time */
- udelay(100);
- } else {
- clk_disable(usb_host_ck);
- clk_disable(usb_dc_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())
- __raw_writeb(__raw_readb(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())
- __raw_writeb(__raw_readb(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;
- }
- #ifdef CONFIG_ARCH_OMAP15XX
- /*
- * 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;
- }
- #else
- #define omap_1510_local_bus_power(x) {}
- #define omap_1510_local_bus_init() {}
- #endif
- #ifdef CONFIG_USB_OTG
- static void start_hnp(struct ohci_hcd *ohci)
- {
- struct usb_hcd *hcd = ohci_to_hcd(ohci);
- const unsigned port = hcd->self.otg_port - 1;
- unsigned long flags;
- u32 l;
- otg_start_hnp(hcd->usb_phy->otg);
- local_irq_save(flags);
- hcd->usb_phy->otg->state = OTG_STATE_A_SUSPEND;
- writel (RH_PS_PSS, &ohci->regs->roothub.portstatus [port]);
- l = omap_readl(OTG_CTRL);
- l &= ~OTG_A_BUSREQ;
- omap_writel(l, OTG_CTRL);
- local_irq_restore(flags);
- }
- #endif
- /*-------------------------------------------------------------------------*/
- static int ohci_omap_reset(struct usb_hcd *hcd)
- {
- struct ohci_hcd *ohci = hcd_to_ohci(hcd);
- struct omap_usb_config *config = dev_get_platdata(hcd->self.controller);
- int need_transceiver = (config->otg != 0);
- int ret;
- dev_dbg(hcd->self.controller, "starting USB Controller\n");
- if (config->otg) {
- hcd->self.otg_port = config->otg;
- /* default/minimum OTG power budget: 8 mA */
- hcd->power_budget = 8;
- }
- /* boards can use OTG transceivers in non-OTG modes */
- need_transceiver = need_transceiver
- || machine_is_omap_h2() || machine_is_omap_h3();
- /* XXX OMAP16xx only */
- if (config->ocpi_enable)
- config->ocpi_enable();
- #ifdef CONFIG_USB_OTG
- if (need_transceiver) {
- hcd->usb_phy = usb_get_phy(USB_PHY_TYPE_USB2);
- if (!IS_ERR_OR_NULL(hcd->usb_phy)) {
- int status = otg_set_host(hcd->usb_phy->otg,
- &ohci_to_hcd(ohci)->self);
- dev_dbg(hcd->self.controller, "init %s phy, status %d\n",
- hcd->usb_phy->label, status);
- if (status) {
- usb_put_phy(hcd->usb_phy);
- return status;
- }
- } else {
- dev_err(hcd->self.controller, "can't find phy\n");
- return -ENODEV;
- }
- ohci->start_hnp = start_hnp;
- }
- #endif
- omap_ohci_clock_power(1);
- if (cpu_is_omap15xx()) {
- omap_1510_local_bus_power(1);
- omap_1510_local_bus_init();
- }
- ret = ohci_setup(hcd);
- if (ret < 0)
- return ret;
- if (config->otg || config->rwc) {
- ohci->hc_control = OHCI_CTRL_RWC;
- writel(OHCI_CTRL_RWC, &ohci->regs->control);
- }
- /* 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_to_hcd(ohci)->power_budget = 250;
- rh &= ~RH_A_NOCP;
- /* gpio9 for overcurrent detction */
- omap_cfg_reg(W8_1610_GPIO9);
- gpio_request(9, "OHCI overcurrent");
- gpio_direction_input(9);
- /* for paranoia's sake: disable USB.PUEN */
- omap_cfg_reg(W4_USB_HIGHZ);
- }
- ohci_writel(ohci, rh, &ohci->regs->roothub.a);
- ohci->flags &= ~OHCI_QUIRK_HUB_POWER;
- } else if (machine_is_nokia770()) {
- /* We require a self-powered hub, which should have
- * plenty of power. */
- ohci_to_hcd(ohci)->power_budget = 0;
- }
- /* FIXME hub_wq 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;
- }
- /*-------------------------------------------------------------------------*/
- /**
- * 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.
- */
- static int usb_hcd_omap_probe (const struct hc_driver *driver,
- struct platform_device *pdev)
- {
- int retval, irq;
- struct usb_hcd *hcd = 0;
- if (pdev->num_resources != 2) {
- dev_err(&pdev->dev, "invalid num_resources: %i\n",
- pdev->num_resources);
- return -ENODEV;
- }
- if (pdev->resource[0].flags != IORESOURCE_MEM
- || pdev->resource[1].flags != IORESOURCE_IRQ) {
- dev_err(&pdev->dev, "invalid resource type\n");
- return -ENODEV;
- }
- usb_host_ck = clk_get(&pdev->dev, "usb_hhc_ck");
- if (IS_ERR(usb_host_ck))
- return PTR_ERR(usb_host_ck);
- if (!cpu_is_omap15xx())
- usb_dc_ck = clk_get(&pdev->dev, "usb_dc_ck");
- else
- usb_dc_ck = clk_get(&pdev->dev, "lb_ck");
- if (IS_ERR(usb_dc_ck)) {
- clk_put(usb_host_ck);
- return PTR_ERR(usb_dc_ck);
- }
- hcd = usb_create_hcd (driver, &pdev->dev, dev_name(&pdev->dev));
- 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 = ioremap(hcd->rsrc_start, hcd->rsrc_len);
- if (!hcd->regs) {
- dev_err(&pdev->dev, "can't ioremap OHCI HCD\n");
- retval = -ENOMEM;
- goto err2;
- }
- irq = platform_get_irq(pdev, 0);
- if (irq < 0) {
- retval = -ENXIO;
- goto err3;
- }
- retval = usb_add_hcd(hcd, irq, 0);
- if (retval)
- goto err3;
- device_wakeup_enable(hcd->self.controller);
- return 0;
- err3:
- iounmap(hcd->regs);
- err2:
- release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
- err1:
- usb_put_hcd(hcd);
- err0:
- clk_put(usb_dc_ck);
- 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.
- */
- static inline void
- usb_hcd_omap_remove (struct usb_hcd *hcd, struct platform_device *pdev)
- {
- dev_dbg(hcd->self.controller, "stopping USB Controller\n");
- usb_remove_hcd(hcd);
- omap_ohci_clock_power(0);
- if (!IS_ERR_OR_NULL(hcd->usb_phy)) {
- (void) otg_set_host(hcd->usb_phy->otg, 0);
- usb_put_phy(hcd->usb_phy);
- }
- if (machine_is_omap_osk())
- gpio_free(9);
- iounmap(hcd->regs);
- release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
- usb_put_hcd(hcd);
- clk_put(usb_dc_ck);
- clk_put(usb_host_ck);
- }
- /*-------------------------------------------------------------------------*/
- static int ohci_hcd_omap_drv_probe(struct platform_device *dev)
- {
- return usb_hcd_omap_probe(&ohci_omap_hc_driver, dev);
- }
- static int ohci_hcd_omap_drv_remove(struct platform_device *dev)
- {
- struct usb_hcd *hcd = platform_get_drvdata(dev);
- usb_hcd_omap_remove(hcd, dev);
- return 0;
- }
- /*-------------------------------------------------------------------------*/
- #ifdef CONFIG_PM
- static int ohci_omap_suspend(struct platform_device *pdev, pm_message_t message)
- {
- struct usb_hcd *hcd = platform_get_drvdata(pdev);
- struct ohci_hcd *ohci = hcd_to_ohci(hcd);
- bool do_wakeup = device_may_wakeup(&pdev->dev);
- int ret;
- if (time_before(jiffies, ohci->next_statechange))
- msleep(5);
- ohci->next_statechange = jiffies;
- ret = ohci_suspend(hcd, do_wakeup);
- if (ret)
- return ret;
- omap_ohci_clock_power(0);
- return ret;
- }
- static int ohci_omap_resume(struct platform_device *dev)
- {
- struct usb_hcd *hcd = platform_get_drvdata(dev);
- struct ohci_hcd *ohci = hcd_to_ohci(hcd);
- if (time_before(jiffies, ohci->next_statechange))
- msleep(5);
- ohci->next_statechange = jiffies;
- omap_ohci_clock_power(1);
- ohci_resume(hcd, false);
- return 0;
- }
- #endif
- /*-------------------------------------------------------------------------*/
- /*
- * Driver definition to register with the OMAP bus
- */
- static struct platform_driver ohci_hcd_omap_driver = {
- .probe = ohci_hcd_omap_drv_probe,
- .remove = ohci_hcd_omap_drv_remove,
- .shutdown = usb_hcd_platform_shutdown,
- #ifdef CONFIG_PM
- .suspend = ohci_omap_suspend,
- .resume = ohci_omap_resume,
- #endif
- .driver = {
- .name = "ohci",
- },
- };
- static const struct ohci_driver_overrides omap_overrides __initconst = {
- .product_desc = "OMAP OHCI",
- .reset = ohci_omap_reset
- };
- static int __init ohci_omap_init(void)
- {
- if (usb_disabled())
- return -ENODEV;
- pr_info("%s: " DRIVER_DESC "\n", hcd_name);
- ohci_init_driver(&ohci_omap_hc_driver, &omap_overrides);
- return platform_driver_register(&ohci_hcd_omap_driver);
- }
- module_init(ohci_omap_init);
- static void __exit ohci_omap_cleanup(void)
- {
- platform_driver_unregister(&ohci_hcd_omap_driver);
- }
- module_exit(ohci_omap_cleanup);
- MODULE_DESCRIPTION(DRIVER_DESC);
- MODULE_ALIAS("platform:ohci");
- MODULE_LICENSE("GPL");
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