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 | |
Russell King | d052d1b | 2005-10-29 19:07:23 +0100 | [diff] [blame] | 19 | #include <linux/platform_device.h> |
Tim Schmielau | de25968 | 2006-01-08 01:02:05 -0800 | [diff] [blame] | 20 | #include <linux/signal.h> |
Russell King | d052d1b | 2005-10-29 19:07:23 +0100 | [diff] [blame] | 21 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 22 | #include <asm/hardware.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 23 | |
| 24 | |
| 25 | extern int usb_disabled(void); |
| 26 | |
| 27 | /*-------------------------------------------------------------------------*/ |
| 28 | |
| 29 | static 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; |
David Brownell | dd9048a | 2006-12-05 03:18:31 -0800 | [diff] [blame] | 41 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 42 | printk(KERN_DEBUG __FILE__ |
| 43 | ": Clock to USB host has been enabled \n"); |
| 44 | } |
| 45 | |
| 46 | static 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 | */ |
| 70 | int 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 | } |
David Brownell | dd9048a | 2006-12-05 03:18:31 -0800 | [diff] [blame] | 92 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | |
Thomas Gleixner | d54b5ca | 2006-07-01 19:29:44 -0700 | [diff] [blame] | 103 | retval = usb_add_hcd(hcd, dev->resource[1].start, IRQF_DISABLED); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | */ |
| 130 | void 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 | |
| 141 | static int __devinit |
| 142 | ohci_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 | |
| 161 | static 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, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 176 | .stop = ohci_stop, |
David Brownell | dd9048a | 2006-12-05 03:18:31 -0800 | [diff] [blame] | 177 | .shutdown = ohci_shutdown, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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, |
Linus Torvalds | 09ca8ad | 2008-07-06 10:27:25 -0700 | [diff] [blame^] | 196 | .hub_irq_enable = ohci_rhsc_enable, |
David Brownell | 9293677 | 2005-09-22 22:32:11 -0700 | [diff] [blame] | 197 | #ifdef CONFIG_PM |
Alan Stern | 0c0382e | 2005-10-13 17:08:02 -0400 | [diff] [blame] | 198 | .bus_suspend = ohci_bus_suspend, |
| 199 | .bus_resume = ohci_bus_resume, |
David Brownell | 9293677 | 2005-09-22 22:32:11 -0700 | [diff] [blame] | 200 | #endif |
| 201 | .start_port_reset = ohci_start_port_reset, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 202 | }; |
| 203 | |
| 204 | /*-------------------------------------------------------------------------*/ |
| 205 | |
Russell King | 3ae5eae | 2005-11-09 22:32:44 +0000 | [diff] [blame] | 206 | static int ohci_hcd_lh7a404_drv_probe(struct platform_device *pdev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 207 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | |
Russell King | 3ae5eae | 2005-11-09 22:32:44 +0000 | [diff] [blame] | 219 | static int ohci_hcd_lh7a404_drv_remove(struct platform_device *pdev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 220 | { |
Richard Purdie | 87cf203 | 2005-11-17 09:47:57 -0800 | [diff] [blame] | 221 | struct usb_hcd *hcd = platform_get_drvdata(pdev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 222 | |
| 223 | usb_hcd_lh7a404_remove(hcd, pdev); |
| 224 | return 0; |
| 225 | } |
| 226 | /*TBD*/ |
Russell King | 3ae5eae | 2005-11-09 22:32:44 +0000 | [diff] [blame] | 227 | /*static int ohci_hcd_lh7a404_drv_suspend(struct platform_device *dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 228 | { |
Russell King | 3ae5eae | 2005-11-09 22:32:44 +0000 | [diff] [blame] | 229 | struct usb_hcd *hcd = platform_get_drvdata(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 230 | |
| 231 | return 0; |
| 232 | } |
Russell King | 3ae5eae | 2005-11-09 22:32:44 +0000 | [diff] [blame] | 233 | static int ohci_hcd_lh7a404_drv_resume(struct platform_device *dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 234 | { |
Russell King | 3ae5eae | 2005-11-09 22:32:44 +0000 | [diff] [blame] | 235 | struct usb_hcd *hcd = platform_get_drvdata(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 236 | |
| 237 | |
| 238 | return 0; |
| 239 | } |
| 240 | */ |
| 241 | |
Russell King | 3ae5eae | 2005-11-09 22:32:44 +0000 | [diff] [blame] | 242 | static struct platform_driver ohci_hcd_lh7a404_driver = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 243 | .probe = ohci_hcd_lh7a404_drv_probe, |
| 244 | .remove = ohci_hcd_lh7a404_drv_remove, |
David Brownell | dd9048a | 2006-12-05 03:18:31 -0800 | [diff] [blame] | 245 | .shutdown = usb_hcd_platform_shutdown, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 246 | /*.suspend = ohci_hcd_lh7a404_drv_suspend, */ |
| 247 | /*.resume = ohci_hcd_lh7a404_drv_resume, */ |
Russell King | 3ae5eae | 2005-11-09 22:32:44 +0000 | [diff] [blame] | 248 | .driver = { |
| 249 | .name = "lh7a404-ohci", |
| 250 | .owner = THIS_MODULE, |
| 251 | }, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 252 | }; |
| 253 | |
Kay Sievers | f4fce61 | 2008-04-10 21:29:22 -0700 | [diff] [blame] | 254 | MODULE_ALIAS("platform:lh7a404-ohci"); |