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 * (C) Copyright 2005 Embedded Alley Solutions, Inc. 8 * 9 * Bus Glue for PNX8550 10 * 11 * Written by Christopher Hoover <ch@hpl.hp.com> 12 * Based on fragments of previous driver by Russell King et al. 13 * 14 * Modified for LH7A404 from ohci-sa1111.c 15 * by Durgesh Pattamatta <pattamattad@sharpsec.com> 16 * 17 * Modified for PNX8550 from ohci-sa1111.c and sa-omap.c 18 * by Vitaly Wool <vitalywool@gmail.com> 19 * 20 * This file is licenced under the GPL. 21 */ 22 23#include <linux/device.h> 24#include <linux/platform_device.h> 25#include <asm/mach-pnx8550/usb.h> 26#include <asm/mach-pnx8550/int.h> 27#include <asm/mach-pnx8550/pci.h> 28 29#ifndef CONFIG_PNX8550 30#error "This file is PNX8550 bus glue. CONFIG_PNX8550 must be defined." 31#endif 32 33extern int usb_disabled(void); 34 35/*-------------------------------------------------------------------------*/ 36 37static void pnx8550_start_hc(struct platform_device *dev) 38{ 39 /* 40 * Set register CLK48CTL to enable and 48MHz 41 */ 42 outl(0x00000003, PCI_BASE | 0x0004770c); 43 44 /* 45 * Set register CLK12CTL to enable and 48MHz 46 */ 47 outl(0x00000003, PCI_BASE | 0x00047710); 48 49 udelay(100); 50} 51 52static void pnx8550_stop_hc(struct platform_device *dev) 53{ 54 udelay(10); 55} 56 57 58/*-------------------------------------------------------------------------*/ 59 60/* configure so an HC device and id are always provided */ 61/* always called with process context; sleeping is OK */ 62 63 64/** 65 * usb_hcd_pnx8550_probe - initialize pnx8550-based HCDs 66 * Context: !in_interrupt() 67 * 68 * Allocates basic resources for this USB host controller, and 69 * then invokes the start() method for the HCD associated with it 70 * through the hotplug entry's driver_data. 71 * 72 */ 73int usb_hcd_pnx8550_probe (const struct hc_driver *driver, 74 struct platform_device *dev) 75{ 76 int retval; 77 struct usb_hcd *hcd; 78 79 if (dev->resource[0].flags != IORESOURCE_MEM || 80 dev->resource[1].flags != IORESOURCE_IRQ) { 81 dev_err (&dev->dev,"invalid resource type\n"); 82 return -ENOMEM; 83 } 84 85 hcd = usb_create_hcd (driver, &dev->dev, "pnx8550"); 86 if (!hcd) 87 return -ENOMEM; 88 hcd->rsrc_start = dev->resource[0].start; 89 hcd->rsrc_len = dev->resource[0].end - dev->resource[0].start + 1; 90 91 if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len, hcd_name)) { 92 dev_err(&dev->dev, "request_mem_region [0x%08llx, 0x%08llx] " 93 "failed\n", hcd->rsrc_start, hcd->rsrc_len); 94 retval = -EBUSY; 95 goto err1; 96 } 97 98 hcd->regs = ioremap(hcd->rsrc_start, hcd->rsrc_len); 99 if (!hcd->regs) { 100 dev_err(&dev->dev, "ioremap [[0x%08llx, 0x%08llx] failed\n", 101 hcd->rsrc_start, hcd->rsrc_len); 102 retval = -ENOMEM; 103 goto err2; 104 } 105 106 pnx8550_start_hc(dev); 107 108 ohci_hcd_init(hcd_to_ohci(hcd)); 109 110 retval = usb_add_hcd(hcd, dev->resource[1].start, IRQF_DISABLED); 111 if (retval == 0) 112 return retval; 113 114 pnx8550_stop_hc(dev); 115 iounmap(hcd->regs); 116 err2: 117 release_mem_region(hcd->rsrc_start, hcd->rsrc_len); 118 err1: 119 usb_put_hcd(hcd); 120 return retval; 121} 122 123 124/* may be called without controller electrically present */ 125/* may be called with controller, bus, and devices active */ 126 127/** 128 * usb_hcd_pnx8550_remove - shutdown processing for pnx8550-based HCDs 129 * @dev: USB Host Controller being removed 130 * Context: !in_interrupt() 131 * 132 * Reverses the effect of usb_hcd_pnx8550_probe(), first invoking 133 * the HCD's stop() method. It is always called from a thread 134 * context, normally "rmmod", "apmd", or something similar. 135 * 136 */ 137void usb_hcd_pnx8550_remove (struct usb_hcd *hcd, struct platform_device *dev) 138{ 139 usb_remove_hcd(hcd); 140 pnx8550_stop_hc(dev); 141 iounmap(hcd->regs); 142 release_mem_region(hcd->rsrc_start, hcd->rsrc_len); 143 usb_put_hcd(hcd); 144} 145 146/*-------------------------------------------------------------------------*/ 147 148static int __devinit 149ohci_pnx8550_start (struct usb_hcd *hcd) 150{ 151 struct ohci_hcd *ohci = hcd_to_ohci (hcd); 152 int ret; 153 154 ohci_dbg (ohci, "ohci_pnx8550_start, ohci:%p", ohci); 155 156 if ((ret = ohci_init(ohci)) < 0) 157 return ret; 158 159 if ((ret = ohci_run (ohci)) < 0) { 160 err ("can't start %s", hcd->self.bus_name); 161 ohci_stop (hcd); 162 return ret; 163 } 164 165 return 0; 166} 167 168/*-------------------------------------------------------------------------*/ 169 170static const struct hc_driver ohci_pnx8550_hc_driver = { 171 .description = hcd_name, 172 .product_desc = "PNX8550 OHCI", 173 .hcd_priv_size = sizeof(struct ohci_hcd), 174 175 /* 176 * generic hardware linkage 177 */ 178 .irq = ohci_irq, 179 .flags = HCD_USB11 | HCD_MEMORY, 180 181 /* 182 * basic lifecycle operations 183 */ 184 .start = ohci_pnx8550_start, 185 .stop = ohci_stop, 186 187 /* 188 * managing i/o requests and associated device resources 189 */ 190 .urb_enqueue = ohci_urb_enqueue, 191 .urb_dequeue = ohci_urb_dequeue, 192 .endpoint_disable = ohci_endpoint_disable, 193 194 /* 195 * scheduling support 196 */ 197 .get_frame_number = ohci_get_frame, 198 199 /* 200 * root hub support 201 */ 202 .hub_status_data = ohci_hub_status_data, 203 .hub_control = ohci_hub_control, 204#ifdef CONFIG_PM 205 .bus_suspend = ohci_bus_suspend, 206 .bus_resume = ohci_bus_resume, 207#endif 208 .start_port_reset = ohci_start_port_reset, 209}; 210 211/*-------------------------------------------------------------------------*/ 212 213static int ohci_hcd_pnx8550_drv_probe(struct platform_device *pdev) 214{ 215 int ret; 216 217 if (usb_disabled()) 218 return -ENODEV; 219 220 ret = usb_hcd_pnx8550_probe(&ohci_pnx8550_hc_driver, pdev); 221 return ret; 222} 223 224static int ohci_hcd_pnx8550_drv_remove(struct platform_device *pdev) 225{ 226 struct usb_hcd *hcd = platform_get_drvdata(pdev); 227 228 usb_hcd_pnx8550_remove(hcd, pdev); 229 return 0; 230} 231 232MODULE_ALIAS("platform:pnx8550-ohci"); 233 234static struct platform_driver ohci_hcd_pnx8550_driver = { 235 .driver = { 236 .name = "pnx8550-ohci", 237 .owner = THIS_MODULE, 238 }, 239 .probe = ohci_hcd_pnx8550_drv_probe, 240 .remove = ohci_hcd_pnx8550_drv_remove, 241}; 242