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 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 <asm/hardware.h> |
| 20 | #include <asm/mach-types.h> |
| 21 | #include <asm/arch/hardware.h> |
| 22 | |
| 23 | |
| 24 | extern int usb_disabled(void); |
| 25 | |
| 26 | /*-------------------------------------------------------------------------*/ |
| 27 | |
| 28 | static void lh7a404_start_hc(struct platform_device *dev) |
| 29 | { |
| 30 | printk(KERN_DEBUG __FILE__ |
| 31 | ": starting LH7A404 OHCI USB Controller\n"); |
| 32 | |
| 33 | /* |
| 34 | * Now, carefully enable the USB clock, and take |
| 35 | * the USB host controller out of reset. |
| 36 | */ |
| 37 | CSC_PWRCNT |= CSC_PWRCNT_USBH_EN; /* Enable clock */ |
| 38 | udelay(1000); |
| 39 | USBH_CMDSTATUS = OHCI_HCR; |
| 40 | |
| 41 | printk(KERN_DEBUG __FILE__ |
| 42 | ": Clock to USB host has been enabled \n"); |
| 43 | } |
| 44 | |
| 45 | static void lh7a404_stop_hc(struct platform_device *dev) |
| 46 | { |
| 47 | printk(KERN_DEBUG __FILE__ |
| 48 | ": stopping LH7A404 OHCI USB Controller\n"); |
| 49 | |
| 50 | CSC_PWRCNT &= ~CSC_PWRCNT_USBH_EN; /* Disable clock */ |
| 51 | } |
| 52 | |
| 53 | |
| 54 | /*-------------------------------------------------------------------------*/ |
| 55 | |
| 56 | /* configure so an HC device and id are always provided */ |
| 57 | /* always called with process context; sleeping is OK */ |
| 58 | |
| 59 | |
| 60 | /** |
| 61 | * usb_hcd_lh7a404_probe - initialize LH7A404-based HCDs |
| 62 | * Context: !in_interrupt() |
| 63 | * |
| 64 | * Allocates basic resources for this USB host controller, and |
| 65 | * then invokes the start() method for the HCD associated with it |
| 66 | * through the hotplug entry's driver_data. |
| 67 | * |
| 68 | */ |
| 69 | int usb_hcd_lh7a404_probe (const struct hc_driver *driver, |
| 70 | struct platform_device *dev) |
| 71 | { |
| 72 | int retval; |
| 73 | struct usb_hcd *hcd; |
| 74 | |
| 75 | if (dev->resource[1].flags != IORESOURCE_IRQ) { |
| 76 | pr_debug("resource[1] is not IORESOURCE_IRQ"); |
| 77 | return -ENOMEM; |
| 78 | } |
| 79 | |
| 80 | hcd = usb_create_hcd(driver, &dev->dev, "lh7a404"); |
| 81 | if (!hcd) |
| 82 | return -ENOMEM; |
| 83 | hcd->rsrc_start = dev->resource[0].start; |
| 84 | hcd->rsrc_len = dev->resource[0].end - dev->resource[0].start + 1; |
| 85 | |
| 86 | if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len, hcd_name)) { |
| 87 | pr_debug("request_mem_region failed"); |
| 88 | retval = -EBUSY; |
| 89 | goto err1; |
| 90 | } |
| 91 | |
| 92 | hcd->regs = ioremap(hcd->rsrc_start, hcd->rsrc_len); |
| 93 | if (!hcd->regs) { |
| 94 | pr_debug("ioremap failed"); |
| 95 | retval = -ENOMEM; |
| 96 | goto err2; |
| 97 | } |
| 98 | |
| 99 | lh7a404_start_hc(dev); |
| 100 | ohci_hcd_init(hcd_to_ohci(hcd)); |
| 101 | |
| 102 | retval = usb_add_hcd(hcd, dev->resource[1].start, SA_INTERRUPT); |
| 103 | if (retval == 0) |
| 104 | return retval; |
| 105 | |
| 106 | lh7a404_stop_hc(dev); |
| 107 | iounmap(hcd->regs); |
| 108 | err2: |
| 109 | release_mem_region(hcd->rsrc_start, hcd->rsrc_len); |
| 110 | err1: |
| 111 | usb_put_hcd(hcd); |
| 112 | return retval; |
| 113 | } |
| 114 | |
| 115 | |
| 116 | /* may be called without controller electrically present */ |
| 117 | /* may be called with controller, bus, and devices active */ |
| 118 | |
| 119 | /** |
| 120 | * usb_hcd_lh7a404_remove - shutdown processing for LH7A404-based HCDs |
| 121 | * @dev: USB Host Controller being removed |
| 122 | * Context: !in_interrupt() |
| 123 | * |
| 124 | * Reverses the effect of usb_hcd_lh7a404_probe(), first invoking |
| 125 | * the HCD's stop() method. It is always called from a thread |
| 126 | * context, normally "rmmod", "apmd", or something similar. |
| 127 | * |
| 128 | */ |
| 129 | void usb_hcd_lh7a404_remove (struct usb_hcd *hcd, struct platform_device *dev) |
| 130 | { |
| 131 | usb_remove_hcd(hcd); |
| 132 | lh7a404_stop_hc(dev); |
| 133 | iounmap(hcd->regs); |
| 134 | release_mem_region(hcd->rsrc_start, hcd->rsrc_len); |
| 135 | usb_put_hcd(hcd); |
| 136 | } |
| 137 | |
| 138 | /*-------------------------------------------------------------------------*/ |
| 139 | |
| 140 | static int __devinit |
| 141 | ohci_lh7a404_start (struct usb_hcd *hcd) |
| 142 | { |
| 143 | struct ohci_hcd *ohci = hcd_to_ohci (hcd); |
| 144 | int ret; |
| 145 | |
| 146 | ohci_dbg (ohci, "ohci_lh7a404_start, ohci:%p", ohci); |
| 147 | if ((ret = ohci_init(ohci)) < 0) |
| 148 | return ret; |
| 149 | |
| 150 | if ((ret = ohci_run (ohci)) < 0) { |
| 151 | err ("can't start %s", hcd->self.bus_name); |
| 152 | ohci_stop (hcd); |
| 153 | return ret; |
| 154 | } |
| 155 | return 0; |
| 156 | } |
| 157 | |
| 158 | /*-------------------------------------------------------------------------*/ |
| 159 | |
| 160 | static const struct hc_driver ohci_lh7a404_hc_driver = { |
| 161 | .description = hcd_name, |
| 162 | .product_desc = "LH7A404 OHCI", |
| 163 | .hcd_priv_size = sizeof(struct ohci_hcd), |
| 164 | |
| 165 | /* |
| 166 | * generic hardware linkage |
| 167 | */ |
| 168 | .irq = ohci_irq, |
| 169 | .flags = HCD_USB11 | HCD_MEMORY, |
| 170 | |
| 171 | /* |
| 172 | * basic lifecycle operations |
| 173 | */ |
| 174 | .start = ohci_lh7a404_start, |
| 175 | #ifdef CONFIG_PM |
| 176 | /* suspend: ohci_lh7a404_suspend, -- tbd */ |
| 177 | /* resume: ohci_lh7a404_resume, -- tbd */ |
| 178 | #endif /*CONFIG_PM*/ |
| 179 | .stop = ohci_stop, |
| 180 | |
| 181 | /* |
| 182 | * managing i/o requests and associated device resources |
| 183 | */ |
| 184 | .urb_enqueue = ohci_urb_enqueue, |
| 185 | .urb_dequeue = ohci_urb_dequeue, |
| 186 | .endpoint_disable = ohci_endpoint_disable, |
| 187 | |
| 188 | /* |
| 189 | * scheduling support |
| 190 | */ |
| 191 | .get_frame_number = ohci_get_frame, |
| 192 | |
| 193 | /* |
| 194 | * root hub support |
| 195 | */ |
| 196 | .hub_status_data = ohci_hub_status_data, |
| 197 | .hub_control = ohci_hub_control, |
| 198 | }; |
| 199 | |
| 200 | /*-------------------------------------------------------------------------*/ |
| 201 | |
| 202 | static int ohci_hcd_lh7a404_drv_probe(struct device *dev) |
| 203 | { |
| 204 | struct platform_device *pdev = to_platform_device(dev); |
| 205 | int ret; |
| 206 | |
| 207 | pr_debug ("In ohci_hcd_lh7a404_drv_probe"); |
| 208 | |
| 209 | if (usb_disabled()) |
| 210 | return -ENODEV; |
| 211 | |
| 212 | ret = usb_hcd_lh7a404_probe(&ohci_lh7a404_hc_driver, pdev); |
| 213 | return ret; |
| 214 | } |
| 215 | |
| 216 | static int ohci_hcd_lh7a404_drv_remove(struct device *dev) |
| 217 | { |
| 218 | struct platform_device *pdev = to_platform_device(dev); |
| 219 | struct usb_hcd *hcd = dev_get_drvdata(dev); |
| 220 | |
| 221 | usb_hcd_lh7a404_remove(hcd, pdev); |
| 222 | return 0; |
| 223 | } |
| 224 | /*TBD*/ |
| 225 | /*static int ohci_hcd_lh7a404_drv_suspend(struct device *dev) |
| 226 | { |
| 227 | struct platform_device *pdev = to_platform_device(dev); |
| 228 | struct usb_hcd *hcd = dev_get_drvdata(dev); |
| 229 | |
| 230 | return 0; |
| 231 | } |
| 232 | static int ohci_hcd_lh7a404_drv_resume(struct device *dev) |
| 233 | { |
| 234 | struct platform_device *pdev = to_platform_device(dev); |
| 235 | struct usb_hcd *hcd = dev_get_drvdata(dev); |
| 236 | |
| 237 | |
| 238 | return 0; |
| 239 | } |
| 240 | */ |
| 241 | |
| 242 | static struct device_driver ohci_hcd_lh7a404_driver = { |
| 243 | .name = "lh7a404-ohci", |
| 244 | .bus = &platform_bus_type, |
| 245 | .probe = ohci_hcd_lh7a404_drv_probe, |
| 246 | .remove = ohci_hcd_lh7a404_drv_remove, |
| 247 | /*.suspend = ohci_hcd_lh7a404_drv_suspend, */ |
| 248 | /*.resume = ohci_hcd_lh7a404_drv_resume, */ |
| 249 | }; |
| 250 | |
| 251 | static int __init ohci_hcd_lh7a404_init (void) |
| 252 | { |
| 253 | pr_debug (DRIVER_INFO " (LH7A404)"); |
| 254 | pr_debug ("block sizes: ed %d td %d\n", |
| 255 | sizeof (struct ed), sizeof (struct td)); |
| 256 | |
| 257 | return driver_register(&ohci_hcd_lh7a404_driver); |
| 258 | } |
| 259 | |
| 260 | static void __exit ohci_hcd_lh7a404_cleanup (void) |
| 261 | { |
| 262 | driver_unregister(&ohci_hcd_lh7a404_driver); |
| 263 | } |
| 264 | |
| 265 | module_init (ohci_hcd_lh7a404_init); |
| 266 | module_exit (ohci_hcd_lh7a404_cleanup); |