Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 AMD Alchemy Au1xxx |
| 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 | * Modified for AMD Alchemy Au1xxx |
| 16 | * by Matt Porter <mporter@kernel.crashing.org> |
| 17 | * |
| 18 | * This file is licenced under the GPL. |
| 19 | */ |
| 20 | |
Russell King | d052d1b | 2005-10-29 19:07:23 +0100 | [diff] [blame] | 21 | #include <linux/platform_device.h> |
Tim Schmielau | de25968 | 2006-01-08 01:02:05 -0800 | [diff] [blame^] | 22 | #include <linux/signal.h> |
Russell King | d052d1b | 2005-10-29 19:07:23 +0100 | [diff] [blame] | 23 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 24 | #include <asm/mach-au1x00/au1000.h> |
| 25 | |
| 26 | #define USBH_ENABLE_BE (1<<0) |
| 27 | #define USBH_ENABLE_C (1<<1) |
| 28 | #define USBH_ENABLE_E (1<<2) |
| 29 | #define USBH_ENABLE_CE (1<<3) |
| 30 | #define USBH_ENABLE_RD (1<<4) |
| 31 | |
| 32 | #ifdef __LITTLE_ENDIAN |
| 33 | #define USBH_ENABLE_INIT (USBH_ENABLE_CE | USBH_ENABLE_E | USBH_ENABLE_C) |
| 34 | #elif __BIG_ENDIAN |
| 35 | #define USBH_ENABLE_INIT (USBH_ENABLE_CE | USBH_ENABLE_E | USBH_ENABLE_C | USBH_ENABLE_BE) |
| 36 | #else |
| 37 | #error not byte order defined |
| 38 | #endif |
| 39 | |
| 40 | extern int usb_disabled(void); |
| 41 | |
| 42 | /*-------------------------------------------------------------------------*/ |
| 43 | |
| 44 | static void au1xxx_start_hc(struct platform_device *dev) |
| 45 | { |
| 46 | printk(KERN_DEBUG __FILE__ |
| 47 | ": starting Au1xxx OHCI USB Controller\n"); |
| 48 | |
| 49 | /* enable host controller */ |
| 50 | au_writel(USBH_ENABLE_CE, USB_HOST_CONFIG); |
| 51 | udelay(1000); |
| 52 | au_writel(USBH_ENABLE_INIT, USB_HOST_CONFIG); |
| 53 | udelay(1000); |
| 54 | |
| 55 | /* wait for reset complete (read register twice; see au1500 errata) */ |
| 56 | while (au_readl(USB_HOST_CONFIG), |
| 57 | !(au_readl(USB_HOST_CONFIG) & USBH_ENABLE_RD)) |
| 58 | udelay(1000); |
| 59 | |
| 60 | printk(KERN_DEBUG __FILE__ |
| 61 | ": Clock to USB host has been enabled \n"); |
| 62 | } |
| 63 | |
| 64 | static void au1xxx_stop_hc(struct platform_device *dev) |
| 65 | { |
| 66 | printk(KERN_DEBUG __FILE__ |
| 67 | ": stopping Au1xxx OHCI USB Controller\n"); |
| 68 | |
| 69 | /* Disable clock */ |
| 70 | au_writel(readl((void *)USB_HOST_CONFIG) & ~USBH_ENABLE_CE, USB_HOST_CONFIG); |
| 71 | } |
| 72 | |
| 73 | |
| 74 | /*-------------------------------------------------------------------------*/ |
| 75 | |
| 76 | /* configure so an HC device and id are always provided */ |
| 77 | /* always called with process context; sleeping is OK */ |
| 78 | |
| 79 | |
| 80 | /** |
| 81 | * usb_hcd_au1xxx_probe - initialize Au1xxx-based HCDs |
| 82 | * Context: !in_interrupt() |
| 83 | * |
| 84 | * Allocates basic resources for this USB host controller, and |
| 85 | * then invokes the start() method for the HCD associated with it |
| 86 | * through the hotplug entry's driver_data. |
| 87 | * |
| 88 | */ |
| 89 | int usb_hcd_au1xxx_probe (const struct hc_driver *driver, |
| 90 | struct platform_device *dev) |
| 91 | { |
| 92 | int retval; |
| 93 | struct usb_hcd *hcd; |
| 94 | |
| 95 | if(dev->resource[1].flags != IORESOURCE_IRQ) { |
| 96 | pr_debug ("resource[1] is not IORESOURCE_IRQ"); |
| 97 | return -ENOMEM; |
| 98 | } |
| 99 | |
| 100 | hcd = usb_create_hcd(driver, &dev->dev, "au1xxx"); |
| 101 | if (!hcd) |
| 102 | return -ENOMEM; |
| 103 | hcd->rsrc_start = dev->resource[0].start; |
| 104 | hcd->rsrc_len = dev->resource[0].end - dev->resource[0].start + 1; |
| 105 | |
| 106 | if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len, hcd_name)) { |
| 107 | pr_debug("request_mem_region failed"); |
| 108 | retval = -EBUSY; |
| 109 | goto err1; |
| 110 | } |
| 111 | |
| 112 | hcd->regs = ioremap(hcd->rsrc_start, hcd->rsrc_len); |
| 113 | if (!hcd->regs) { |
| 114 | pr_debug("ioremap failed"); |
| 115 | retval = -ENOMEM; |
| 116 | goto err2; |
| 117 | } |
| 118 | |
| 119 | au1xxx_start_hc(dev); |
| 120 | ohci_hcd_init(hcd_to_ohci(hcd)); |
| 121 | |
| 122 | retval = usb_add_hcd(hcd, dev->resource[1].start, SA_INTERRUPT); |
| 123 | if (retval == 0) |
| 124 | return retval; |
| 125 | |
| 126 | au1xxx_stop_hc(dev); |
| 127 | iounmap(hcd->regs); |
| 128 | err2: |
| 129 | release_mem_region(hcd->rsrc_start, hcd->rsrc_len); |
| 130 | err1: |
| 131 | usb_put_hcd(hcd); |
| 132 | return retval; |
| 133 | } |
| 134 | |
| 135 | |
| 136 | /* may be called without controller electrically present */ |
| 137 | /* may be called with controller, bus, and devices active */ |
| 138 | |
| 139 | /** |
| 140 | * usb_hcd_au1xxx_remove - shutdown processing for Au1xxx-based HCDs |
| 141 | * @dev: USB Host Controller being removed |
| 142 | * Context: !in_interrupt() |
| 143 | * |
| 144 | * Reverses the effect of usb_hcd_au1xxx_probe(), first invoking |
| 145 | * the HCD's stop() method. It is always called from a thread |
| 146 | * context, normally "rmmod", "apmd", or something similar. |
| 147 | * |
| 148 | */ |
| 149 | void usb_hcd_au1xxx_remove (struct usb_hcd *hcd, struct platform_device *dev) |
| 150 | { |
| 151 | usb_remove_hcd(hcd); |
| 152 | au1xxx_stop_hc(dev); |
| 153 | iounmap(hcd->regs); |
| 154 | release_mem_region(hcd->rsrc_start, hcd->rsrc_len); |
| 155 | usb_put_hcd(hcd); |
| 156 | } |
| 157 | |
| 158 | /*-------------------------------------------------------------------------*/ |
| 159 | |
| 160 | static int __devinit |
| 161 | ohci_au1xxx_start (struct usb_hcd *hcd) |
| 162 | { |
| 163 | struct ohci_hcd *ohci = hcd_to_ohci (hcd); |
| 164 | int ret; |
| 165 | |
| 166 | ohci_dbg (ohci, "ohci_au1xxx_start, ohci:%p", ohci); |
| 167 | |
| 168 | if ((ret = ohci_init (ohci)) < 0) |
| 169 | return ret; |
| 170 | |
| 171 | if ((ret = ohci_run (ohci)) < 0) { |
| 172 | err ("can't start %s", hcd->self.bus_name); |
| 173 | ohci_stop (hcd); |
| 174 | return ret; |
| 175 | } |
| 176 | |
| 177 | return 0; |
| 178 | } |
| 179 | |
| 180 | /*-------------------------------------------------------------------------*/ |
| 181 | |
| 182 | static const struct hc_driver ohci_au1xxx_hc_driver = { |
| 183 | .description = hcd_name, |
| 184 | .product_desc = "Au1xxx OHCI", |
| 185 | .hcd_priv_size = sizeof(struct ohci_hcd), |
| 186 | |
| 187 | /* |
| 188 | * generic hardware linkage |
| 189 | */ |
| 190 | .irq = ohci_irq, |
| 191 | .flags = HCD_USB11 | HCD_MEMORY, |
| 192 | |
| 193 | /* |
| 194 | * basic lifecycle operations |
| 195 | */ |
| 196 | .start = ohci_au1xxx_start, |
| 197 | #ifdef CONFIG_PM |
| 198 | /* suspend: ohci_au1xxx_suspend, -- tbd */ |
| 199 | /* resume: ohci_au1xxx_resume, -- tbd */ |
| 200 | #endif /*CONFIG_PM*/ |
| 201 | .stop = ohci_stop, |
| 202 | |
| 203 | /* |
| 204 | * managing i/o requests and associated device resources |
| 205 | */ |
| 206 | .urb_enqueue = ohci_urb_enqueue, |
| 207 | .urb_dequeue = ohci_urb_dequeue, |
| 208 | .endpoint_disable = ohci_endpoint_disable, |
| 209 | |
| 210 | /* |
| 211 | * scheduling support |
| 212 | */ |
| 213 | .get_frame_number = ohci_get_frame, |
| 214 | |
| 215 | /* |
| 216 | * root hub support |
| 217 | */ |
| 218 | .hub_status_data = ohci_hub_status_data, |
| 219 | .hub_control = ohci_hub_control, |
David Brownell | 9293677 | 2005-09-22 22:32:11 -0700 | [diff] [blame] | 220 | #ifdef CONFIG_PM |
Alan Stern | 0c0382e | 2005-10-13 17:08:02 -0400 | [diff] [blame] | 221 | .bus_suspend = ohci_bus_suspend, |
| 222 | .bus_resume = ohci_bus_resume, |
David Brownell | 9293677 | 2005-09-22 22:32:11 -0700 | [diff] [blame] | 223 | #endif |
| 224 | .start_port_reset = ohci_start_port_reset, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 225 | }; |
| 226 | |
| 227 | /*-------------------------------------------------------------------------*/ |
| 228 | |
Russell King | 3ae5eae | 2005-11-09 22:32:44 +0000 | [diff] [blame] | 229 | static int ohci_hcd_au1xxx_drv_probe(struct platform_device *pdev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 230 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 231 | int ret; |
| 232 | |
| 233 | pr_debug ("In ohci_hcd_au1xxx_drv_probe"); |
| 234 | |
| 235 | if (usb_disabled()) |
| 236 | return -ENODEV; |
| 237 | |
| 238 | ret = usb_hcd_au1xxx_probe(&ohci_au1xxx_hc_driver, pdev); |
| 239 | return ret; |
| 240 | } |
| 241 | |
Russell King | 3ae5eae | 2005-11-09 22:32:44 +0000 | [diff] [blame] | 242 | static int ohci_hcd_au1xxx_drv_remove(struct platform_device *pdev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 243 | { |
Russell King | 3ae5eae | 2005-11-09 22:32:44 +0000 | [diff] [blame] | 244 | struct usb_hcd *hcd = platform_get_drvdata(pdev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 245 | |
| 246 | usb_hcd_au1xxx_remove(hcd, pdev); |
| 247 | return 0; |
| 248 | } |
| 249 | /*TBD*/ |
Russell King | 3ae5eae | 2005-11-09 22:32:44 +0000 | [diff] [blame] | 250 | /*static int ohci_hcd_au1xxx_drv_suspend(struct platform_device *dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 251 | { |
Russell King | 3ae5eae | 2005-11-09 22:32:44 +0000 | [diff] [blame] | 252 | struct usb_hcd *hcd = platform_get_drvdata(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 253 | |
| 254 | return 0; |
| 255 | } |
Russell King | 3ae5eae | 2005-11-09 22:32:44 +0000 | [diff] [blame] | 256 | static int ohci_hcd_au1xxx_drv_resume(struct platform_device *dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 257 | { |
Russell King | 3ae5eae | 2005-11-09 22:32:44 +0000 | [diff] [blame] | 258 | struct usb_hcd *hcd = platform_get_drvdata(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 259 | |
| 260 | return 0; |
| 261 | } |
| 262 | */ |
| 263 | |
Russell King | 3ae5eae | 2005-11-09 22:32:44 +0000 | [diff] [blame] | 264 | static struct platform_driver ohci_hcd_au1xxx_driver = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 265 | .probe = ohci_hcd_au1xxx_drv_probe, |
| 266 | .remove = ohci_hcd_au1xxx_drv_remove, |
| 267 | /*.suspend = ohci_hcd_au1xxx_drv_suspend, */ |
| 268 | /*.resume = ohci_hcd_au1xxx_drv_resume, */ |
Russell King | 3ae5eae | 2005-11-09 22:32:44 +0000 | [diff] [blame] | 269 | .driver = { |
| 270 | .name = "au1xxx-ohci", |
| 271 | .owner = THIS_MODULE, |
| 272 | }, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 273 | }; |
| 274 | |
| 275 | static int __init ohci_hcd_au1xxx_init (void) |
| 276 | { |
| 277 | pr_debug (DRIVER_INFO " (Au1xxx)"); |
| 278 | pr_debug ("block sizes: ed %d td %d\n", |
| 279 | sizeof (struct ed), sizeof (struct td)); |
| 280 | |
Russell King | 3ae5eae | 2005-11-09 22:32:44 +0000 | [diff] [blame] | 281 | return platform_driver_register(&ohci_hcd_au1xxx_driver); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 282 | } |
| 283 | |
| 284 | static void __exit ohci_hcd_au1xxx_cleanup (void) |
| 285 | { |
Russell King | 3ae5eae | 2005-11-09 22:32:44 +0000 | [diff] [blame] | 286 | platform_driver_unregister(&ohci_hcd_au1xxx_driver); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 287 | } |
| 288 | |
| 289 | module_init (ohci_hcd_au1xxx_init); |
| 290 | module_exit (ohci_hcd_au1xxx_cleanup); |