| /* |
| * OHCI HCD (Host Controller Driver) for USB. |
| * |
| * (C) Copyright 1999 Roman Weissgaerber <weissg@vienna.at> |
| * (C) Copyright 2000-2002 David Brownell <dbrownell@users.sourceforge.net> |
| * (C) Copyright 2002 Hewlett-Packard Company |
| * |
| * USB Bus Glue for Samsung S3C2410 |
| * |
| * Written by Christopher Hoover <ch@hpl.hp.com> |
| * Based on fragments of previous driver by Rusell King et al. |
| * |
| * Modified for S3C2410 from ohci-sa1111.c, ohci-omap.c and ohci-lh7a40.c |
| * by Ben Dooks, <ben@simtec.co.uk> |
| * Copyright (C) 2004 Simtec Electronics |
| * |
| * Thanks to basprog@mail.ru for updates to newer kernels |
| * |
| * This file is licenced under the GPL. |
| */ |
| |
| #include <linux/platform_device.h> |
| #include <linux/clk.h> |
| |
| #include <asm/hardware.h> |
| #include <asm/arch/usb-control.h> |
| |
| #define valid_port(idx) ((idx) == 1 || (idx) == 2) |
| |
| /* clock device associated with the hcd */ |
| |
| static struct clk *clk; |
| |
| /* forward definitions */ |
| |
| static void s3c2410_hcd_oc(struct s3c2410_hcd_info *info, int port_oc); |
| |
| /* conversion functions */ |
| |
| static struct s3c2410_hcd_info *to_s3c2410_info(struct usb_hcd *hcd) |
| { |
| return hcd->self.controller->platform_data; |
| } |
| |
| static void s3c2410_start_hc(struct platform_device *dev, struct usb_hcd *hcd) |
| { |
| struct s3c2410_hcd_info *info = dev->dev.platform_data; |
| |
| dev_dbg(&dev->dev, "s3c2410_start_hc:\n"); |
| clk_enable(clk); |
| |
| if (info != NULL) { |
| info->hcd = hcd; |
| info->report_oc = s3c2410_hcd_oc; |
| |
| if (info->enable_oc != NULL) { |
| (info->enable_oc)(info, 1); |
| } |
| } |
| } |
| |
| static void s3c2410_stop_hc(struct platform_device *dev) |
| { |
| struct s3c2410_hcd_info *info = dev->dev.platform_data; |
| |
| dev_dbg(&dev->dev, "s3c2410_stop_hc:\n"); |
| |
| if (info != NULL) { |
| info->report_oc = NULL; |
| info->hcd = NULL; |
| |
| if (info->enable_oc != NULL) { |
| (info->enable_oc)(info, 0); |
| } |
| } |
| |
| clk_disable(clk); |
| } |
| |
| /* ohci_s3c2410_hub_status_data |
| * |
| * update the status data from the hub with anything that |
| * has been detected by our system |
| */ |
| |
| static int |
| ohci_s3c2410_hub_status_data (struct usb_hcd *hcd, char *buf) |
| { |
| struct s3c2410_hcd_info *info = to_s3c2410_info(hcd); |
| struct s3c2410_hcd_port *port; |
| int orig; |
| int portno; |
| |
| orig = ohci_hub_status_data (hcd, buf); |
| |
| if (info == NULL) |
| return orig; |
| |
| port = &info->port[0]; |
| |
| /* mark any changed port as changed */ |
| |
| for (portno = 0; portno < 2; port++, portno++) { |
| if (port->oc_changed == 1 && |
| port->flags & S3C_HCDFLG_USED) { |
| dev_dbg(hcd->self.controller, |
| "oc change on port %d\n", portno); |
| |
| if (orig < 1) |
| orig = 1; |
| |
| buf[0] |= 1<<(portno+1); |
| } |
| } |
| |
| return orig; |
| } |
| |
| /* s3c2410_usb_set_power |
| * |
| * configure the power on a port, by calling the platform device |
| * routine registered with the platform device |
| */ |
| |
| static void s3c2410_usb_set_power(struct s3c2410_hcd_info *info, |
| int port, int to) |
| { |
| if (info == NULL) |
| return; |
| |
| if (info->power_control != NULL) { |
| info->port[port-1].power = to; |
| (info->power_control)(port-1, to); |
| } |
| } |
| |
| /* ohci_s3c2410_hub_control |
| * |
| * look at control requests to the hub, and see if we need |
| * to take any action or over-ride the results from the |
| * request. |
| */ |
| |
| static int ohci_s3c2410_hub_control ( |
| struct usb_hcd *hcd, |
| u16 typeReq, |
| u16 wValue, |
| u16 wIndex, |
| char *buf, |
| u16 wLength) |
| { |
| struct s3c2410_hcd_info *info = to_s3c2410_info(hcd); |
| struct usb_hub_descriptor *desc; |
| int ret = -EINVAL; |
| u32 *data = (u32 *)buf; |
| |
| dev_dbg(hcd->self.controller, |
| "s3c2410_hub_control(%p,0x%04x,0x%04x,0x%04x,%p,%04x)\n", |
| hcd, typeReq, wValue, wIndex, buf, wLength); |
| |
| /* if we are only an humble host without any special capabilities |
| * process the request straight away and exit */ |
| |
| if (info == NULL) { |
| ret = ohci_hub_control(hcd, typeReq, wValue, |
| wIndex, buf, wLength); |
| goto out; |
| } |
| |
| /* check the request to see if it needs handling */ |
| |
| switch (typeReq) { |
| case SetPortFeature: |
| if (wValue == USB_PORT_FEAT_POWER) { |
| dev_dbg(hcd->self.controller, "SetPortFeat: POWER\n"); |
| s3c2410_usb_set_power(info, wIndex, 1); |
| goto out; |
| } |
| break; |
| |
| case ClearPortFeature: |
| switch (wValue) { |
| case USB_PORT_FEAT_C_OVER_CURRENT: |
| dev_dbg(hcd->self.controller, |
| "ClearPortFeature: C_OVER_CURRENT\n"); |
| |
| if (valid_port(wIndex)) { |
| info->port[wIndex-1].oc_changed = 0; |
| info->port[wIndex-1].oc_status = 0; |
| } |
| |
| goto out; |
| |
| case USB_PORT_FEAT_OVER_CURRENT: |
| dev_dbg(hcd->self.controller, |
| "ClearPortFeature: OVER_CURRENT\n"); |
| |
| if (valid_port(wIndex)) { |
| info->port[wIndex-1].oc_status = 0; |
| } |
| |
| goto out; |
| |
| case USB_PORT_FEAT_POWER: |
| dev_dbg(hcd->self.controller, |
| "ClearPortFeature: POWER\n"); |
| |
| if (valid_port(wIndex)) { |
| s3c2410_usb_set_power(info, wIndex, 0); |
| return 0; |
| } |
| } |
| break; |
| } |
| |
| ret = ohci_hub_control(hcd, typeReq, wValue, wIndex, buf, wLength); |
| if (ret) |
| goto out; |
| |
| switch (typeReq) { |
| case GetHubDescriptor: |
| |
| /* update the hub's descriptor */ |
| |
| desc = (struct usb_hub_descriptor *)buf; |
| |
| if (info->power_control == NULL) |
| return ret; |
| |
| dev_dbg(hcd->self.controller, "wHubCharacteristics 0x%04x\n", |
| desc->wHubCharacteristics); |
| |
| /* remove the old configurations for power-switching, and |
| * over-current protection, and insert our new configuration |
| */ |
| |
| desc->wHubCharacteristics &= ~cpu_to_le16(HUB_CHAR_LPSM); |
| desc->wHubCharacteristics |= cpu_to_le16(0x0001); |
| |
| if (info->enable_oc) { |
| desc->wHubCharacteristics &= ~cpu_to_le16(HUB_CHAR_OCPM); |
| desc->wHubCharacteristics |= cpu_to_le16(0x0008|0x0001); |
| } |
| |
| dev_dbg(hcd->self.controller, "wHubCharacteristics after 0x%04x\n", |
| desc->wHubCharacteristics); |
| |
| return ret; |
| |
| case GetPortStatus: |
| /* check port status */ |
| |
| dev_dbg(hcd->self.controller, "GetPortStatus(%d)\n", wIndex); |
| |
| if (valid_port(wIndex)) { |
| if (info->port[wIndex-1].oc_changed) { |
| *data |= cpu_to_le32(RH_PS_OCIC); |
| } |
| |
| if (info->port[wIndex-1].oc_status) { |
| *data |= cpu_to_le32(RH_PS_POCI); |
| } |
| } |
| } |
| |
| out: |
| return ret; |
| } |
| |
| /* s3c2410_hcd_oc |
| * |
| * handle an over-current report |
| */ |
| |
| static void s3c2410_hcd_oc(struct s3c2410_hcd_info *info, int port_oc) |
| { |
| struct s3c2410_hcd_port *port; |
| struct usb_hcd *hcd; |
| unsigned long flags; |
| int portno; |
| |
| if (info == NULL) |
| return; |
| |
| port = &info->port[0]; |
| hcd = info->hcd; |
| |
| local_irq_save(flags); |
| |
| for (portno = 0; portno < 2; port++, portno++) { |
| if (port_oc & (1<<portno) && |
| port->flags & S3C_HCDFLG_USED) { |
| port->oc_status = 1; |
| port->oc_changed = 1; |
| |
| /* ok, once over-current is detected, |
| the port needs to be powered down */ |
| s3c2410_usb_set_power(info, portno+1, 0); |
| } |
| } |
| |
| local_irq_restore(flags); |
| } |
| |
| /* may be called without controller electrically present */ |
| /* may be called with controller, bus, and devices active */ |
| |
| /* |
| * usb_hcd_s3c2410_remove - shutdown processing for HCD |
| * @dev: USB Host Controller being removed |
| * Context: !in_interrupt() |
| * |
| * Reverses the effect of usb_hcd_3c2410_probe(), first invoking |
| * the HCD's stop() method. It is always called from a thread |
| * context, normally "rmmod", "apmd", or something similar. |
| * |
| */ |
| |
| static void |
| usb_hcd_s3c2410_remove (struct usb_hcd *hcd, struct platform_device *dev) |
| { |
| usb_remove_hcd(hcd); |
| s3c2410_stop_hc(dev); |
| iounmap(hcd->regs); |
| release_mem_region(hcd->rsrc_start, hcd->rsrc_len); |
| usb_put_hcd(hcd); |
| } |
| |
| /** |
| * usb_hcd_s3c2410_probe - initialize S3C2410-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_s3c2410_probe (const struct hc_driver *driver, |
| struct platform_device *dev) |
| { |
| struct usb_hcd *hcd = NULL; |
| int retval; |
| |
| s3c2410_usb_set_power(dev->dev.platform_data, 1, 1); |
| s3c2410_usb_set_power(dev->dev.platform_data, 2, 1); |
| |
| hcd = usb_create_hcd(driver, &dev->dev, "s3c24xx"); |
| if (hcd == NULL) |
| return -ENOMEM; |
| |
| hcd->rsrc_start = dev->resource[0].start; |
| hcd->rsrc_len = dev->resource[0].end - dev->resource[0].start + 1; |
| |
| if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len, hcd_name)) { |
| dev_err(&dev->dev, "request_mem_region failed"); |
| retval = -EBUSY; |
| goto err0; |
| } |
| |
| clk = clk_get(NULL, "usb-host"); |
| if (IS_ERR(clk)) { |
| dev_err(&dev->dev, "cannot get usb-host clock\n"); |
| retval = -ENOENT; |
| goto err1; |
| } |
| |
| s3c2410_start_hc(dev, hcd); |
| |
| hcd->regs = ioremap(hcd->rsrc_start, hcd->rsrc_len); |
| if (!hcd->regs) { |
| dev_err(&dev->dev, "ioremap failed\n"); |
| retval = -ENOMEM; |
| goto err2; |
| } |
| |
| ohci_hcd_init(hcd_to_ohci(hcd)); |
| |
| retval = usb_add_hcd(hcd, dev->resource[1].start, SA_INTERRUPT); |
| if (retval != 0) |
| goto err2; |
| |
| return 0; |
| |
| err2: |
| s3c2410_stop_hc(dev); |
| iounmap(hcd->regs); |
| clk_put(clk); |
| |
| err1: |
| release_mem_region(hcd->rsrc_start, hcd->rsrc_len); |
| |
| err0: |
| usb_put_hcd(hcd); |
| return retval; |
| } |
| |
| /*-------------------------------------------------------------------------*/ |
| |
| static int |
| ohci_s3c2410_start (struct usb_hcd *hcd) |
| { |
| struct ohci_hcd *ohci = hcd_to_ohci (hcd); |
| int ret; |
| |
| if ((ret = ohci_init(ohci)) < 0) |
| return ret; |
| |
| if ((ret = ohci_run (ohci)) < 0) { |
| err ("can't start %s", hcd->self.bus_name); |
| ohci_stop (hcd); |
| return ret; |
| } |
| |
| return 0; |
| } |
| |
| |
| static const struct hc_driver ohci_s3c2410_hc_driver = { |
| .description = hcd_name, |
| .product_desc = "S3C24XX OHCI", |
| .hcd_priv_size = sizeof(struct ohci_hcd), |
| |
| /* |
| * generic hardware linkage |
| */ |
| .irq = ohci_irq, |
| .flags = HCD_USB11 | HCD_MEMORY, |
| |
| /* |
| * basic lifecycle operations |
| */ |
| .start = ohci_s3c2410_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_s3c2410_hub_status_data, |
| .hub_control = ohci_s3c2410_hub_control, |
| #ifdef CONFIG_PM |
| .bus_suspend = ohci_bus_suspend, |
| .bus_resume = ohci_bus_resume, |
| #endif |
| .start_port_reset = ohci_start_port_reset, |
| }; |
| |
| /* device driver */ |
| |
| static int ohci_hcd_s3c2410_drv_probe(struct platform_device *pdev) |
| { |
| return usb_hcd_s3c2410_probe(&ohci_s3c2410_hc_driver, pdev); |
| } |
| |
| static int ohci_hcd_s3c2410_drv_remove(struct platform_device *pdev) |
| { |
| struct usb_hcd *hcd = platform_get_drvdata(pdev); |
| |
| usb_hcd_s3c2410_remove(hcd, pdev); |
| return 0; |
| } |
| |
| static struct platform_driver ohci_hcd_s3c2410_driver = { |
| .probe = ohci_hcd_s3c2410_drv_probe, |
| .remove = ohci_hcd_s3c2410_drv_remove, |
| /*.suspend = ohci_hcd_s3c2410_drv_suspend, */ |
| /*.resume = ohci_hcd_s3c2410_drv_resume, */ |
| .driver = { |
| .owner = THIS_MODULE, |
| .name = "s3c2410-ohci", |
| }, |
| }; |
| |
| static int __init ohci_hcd_s3c2410_init (void) |
| { |
| return platform_driver_register(&ohci_hcd_s3c2410_driver); |
| } |
| |
| static void __exit ohci_hcd_s3c2410_cleanup (void) |
| { |
| platform_driver_unregister(&ohci_hcd_s3c2410_driver); |
| } |
| |
| module_init (ohci_hcd_s3c2410_init); |
| module_exit (ohci_hcd_s3c2410_cleanup); |