diff options
author | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 22:20:36 (GMT) |
---|---|---|
committer | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 22:20:36 (GMT) |
commit | 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch) | |
tree | 0bba044c4ce775e45a88a51686b5d9f90697ea9d /drivers/usb/host/ohci-omap.c | |
download | linux-1da177e4c3f41524e886b7f1b8a0c1fc7321cac2.tar.xz |
Linux-2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.
Let it rip!
Diffstat (limited to 'drivers/usb/host/ohci-omap.c')
-rw-r--r-- | drivers/usb/host/ohci-omap.c | 560 |
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 0000000..90285f1 --- /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); |