1/* 2 * OHCI HCD (Host Controller Driver) for USB. 3 * 4 * (C) Copyright 1999 Roman Weissgaerber <weissg@vienna.at> 5 * (C) Copyright 2000-2002 David Brownell <dbrownell@users.sourceforge.net> 6 * (C) Copyright 2002 Hewlett-Packard Company 7 * 8 * Bus Glue for Sharp LH7A404 9 * 10 * Written by Christopher Hoover <ch@hpl.hp.com> 11 * Based on fragments of previous driver by Rusell King et al. 12 * 13 * Modified for LH7A404 from ohci-sa1111.c 14 * by Durgesh Pattamatta <pattamattad@sharpsec.com> 15 * 16 * This file is licenced under the GPL. 17 */ 18 19#include <linux/platform_device.h> 20#include <linux/signal.h> 21 22#include <asm/hardware.h> 23 24 25extern int usb_disabled(void); 26 27/*-------------------------------------------------------------------------*/ 28 29static void lh7a404_start_hc(struct platform_device *dev) 30{ 31 printk(KERN_DEBUG __FILE__ 32 ": starting LH7A404 OHCI USB Controller\n"); 33 34 /* 35 * Now, carefully enable the USB clock, and take 36 * the USB host controller out of reset. 37 */ 38 CSC_PWRCNT |= CSC_PWRCNT_USBH_EN; /* Enable clock */ 39 udelay(1000); 40 USBH_CMDSTATUS = OHCI_HCR; 41 42 printk(KERN_DEBUG __FILE__ 43 ": Clock to USB host has been enabled \n"); 44} 45 46static void lh7a404_stop_hc(struct platform_device *dev) 47{ 48 printk(KERN_DEBUG __FILE__ 49 ": stopping LH7A404 OHCI USB Controller\n"); 50 51 CSC_PWRCNT &= ~CSC_PWRCNT_USBH_EN; /* Disable clock */ 52} 53 54 55/*-------------------------------------------------------------------------*/ 56 57/* configure so an HC device and id are always provided */ 58/* always called with process context; sleeping is OK */ 59 60 61/** 62 * usb_hcd_lh7a404_probe - initialize LH7A404-based HCDs 63 * Context: !in_interrupt() 64 * 65 * Allocates basic resources for this USB host controller, and 66 * then invokes the start() method for the HCD associated with it 67 * through the hotplug entry's driver_data. 68 * 69 */ 70int usb_hcd_lh7a404_probe (const struct hc_driver *driver, 71 struct platform_device *dev) 72{ 73 int retval; 74 struct usb_hcd *hcd; 75 76 if (dev->resource[1].flags != IORESOURCE_IRQ) { 77 pr_debug("resource[1] is not IORESOURCE_IRQ"); 78 return -ENOMEM; 79 } 80 81 hcd = usb_create_hcd(driver, &dev->dev, "lh7a404"); 82 if (!hcd) 83 return -ENOMEM; 84 hcd->rsrc_start = dev->resource[0].start; 85 hcd->rsrc_len = dev->resource[0].end - dev->resource[0].start + 1; 86 87 if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len, hcd_name)) { 88 pr_debug("request_mem_region failed"); 89 retval = -EBUSY; 90 goto err1; 91 } 92 93 hcd->regs = ioremap(hcd->rsrc_start, hcd->rsrc_len); 94 if (!hcd->regs) { 95 pr_debug("ioremap failed"); 96 retval = -ENOMEM; 97 goto err2; 98 } 99 100 lh7a404_start_hc(dev); 101 ohci_hcd_init(hcd_to_ohci(hcd)); 102 103 retval = usb_add_hcd(hcd, dev->resource[1].start, IRQF_DISABLED); 104 if (retval == 0) 105 return retval; 106 107 lh7a404_stop_hc(dev); 108 iounmap(hcd->regs); 109 err2: 110 release_mem_region(hcd->rsrc_start, hcd->rsrc_len); 111 err1: 112 usb_put_hcd(hcd); 113 return retval; 114} 115 116 117/* may be called without controller electrically present */ 118/* may be called with controller, bus, and devices active */ 119 120/** 121 * usb_hcd_lh7a404_remove - shutdown processing for LH7A404-based HCDs 122 * @dev: USB Host Controller being removed 123 * Context: !in_interrupt() 124 * 125 * Reverses the effect of usb_hcd_lh7a404_probe(), first invoking 126 * the HCD's stop() method. It is always called from a thread 127 * context, normally "rmmod", "apmd", or something similar. 128 * 129 */ 130void usb_hcd_lh7a404_remove (struct usb_hcd *hcd, struct platform_device *dev) 131{ 132 usb_remove_hcd(hcd); 133 lh7a404_stop_hc(dev); 134 iounmap(hcd->regs); 135 release_mem_region(hcd->rsrc_start, hcd->rsrc_len); 136 usb_put_hcd(hcd); 137} 138 139/*-------------------------------------------------------------------------*/ 140 141static int __devinit 142ohci_lh7a404_start (struct usb_hcd *hcd) 143{ 144 struct ohci_hcd *ohci = hcd_to_ohci (hcd); 145 int ret; 146 147 ohci_dbg (ohci, "ohci_lh7a404_start, ohci:%p", ohci); 148 if ((ret = ohci_init(ohci)) < 0) 149 return ret; 150 151 if ((ret = ohci_run (ohci)) < 0) { 152 err ("can't start %s", hcd->self.bus_name); 153 ohci_stop (hcd); 154 return ret; 155 } 156 return 0; 157} 158 159/*-------------------------------------------------------------------------*/ 160 161static const struct hc_driver ohci_lh7a404_hc_driver = { 162 .description = hcd_name, 163 .product_desc = "LH7A404 OHCI", 164 .hcd_priv_size = sizeof(struct ohci_hcd), 165 166 /* 167 * generic hardware linkage 168 */ 169 .irq = ohci_irq, 170 .flags = HCD_USB11 | HCD_MEMORY, 171 172 /* 173 * basic lifecycle operations 174 */ 175 .start = ohci_lh7a404_start, 176 .stop = ohci_stop, 177 .shutdown = ohci_shutdown, 178 179 /* 180 * managing i/o requests and associated device resources 181 */ 182 .urb_enqueue = ohci_urb_enqueue, 183 .urb_dequeue = ohci_urb_dequeue, 184 .endpoint_disable = ohci_endpoint_disable, 185 186 /* 187 * scheduling support 188 */ 189 .get_frame_number = ohci_get_frame, 190 191 /* 192 * root hub support 193 */ 194 .hub_status_data = ohci_hub_status_data, 195 .hub_control = ohci_hub_control, 196 .hub_irq_enable = ohci_rhsc_enable, 197#ifdef CONFIG_PM 198 .bus_suspend = ohci_bus_suspend, 199 .bus_resume = ohci_bus_resume, 200#endif 201 .start_port_reset = ohci_start_port_reset, 202}; 203 204/*-------------------------------------------------------------------------*/ 205 206static int ohci_hcd_lh7a404_drv_probe(struct platform_device *pdev) 207{ 208 int ret; 209 210 pr_debug ("In ohci_hcd_lh7a404_drv_probe"); 211 212 if (usb_disabled()) 213 return -ENODEV; 214 215 ret = usb_hcd_lh7a404_probe(&ohci_lh7a404_hc_driver, pdev); 216 return ret; 217} 218 219static int ohci_hcd_lh7a404_drv_remove(struct platform_device *pdev) 220{ 221 struct usb_hcd *hcd = platform_get_drvdata(pdev); 222 223 usb_hcd_lh7a404_remove(hcd, pdev); 224 return 0; 225} 226 /*TBD*/ 227/*static int ohci_hcd_lh7a404_drv_suspend(struct platform_device *dev) 228{ 229 struct usb_hcd *hcd = platform_get_drvdata(dev); 230 231 return 0; 232} 233static int ohci_hcd_lh7a404_drv_resume(struct platform_device *dev) 234{ 235 struct usb_hcd *hcd = platform_get_drvdata(dev); 236 237 238 return 0; 239} 240*/ 241 242static struct platform_driver ohci_hcd_lh7a404_driver = { 243 .probe = ohci_hcd_lh7a404_drv_probe, 244 .remove = ohci_hcd_lh7a404_drv_remove, 245 .shutdown = usb_hcd_platform_shutdown, 246 /*.suspend = ohci_hcd_lh7a404_drv_suspend, */ 247 /*.resume = ohci_hcd_lh7a404_drv_resume, */ 248 .driver = { 249 .name = "lh7a404-ohci", 250 .owner = THIS_MODULE, 251 }, 252}; 253