Vitaly Wool | 5151d04 | 2006-10-09 01:32:00 -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 | * (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 | |
| 33 | extern int usb_disabled(void); |
| 34 | |
| 35 | /*-------------------------------------------------------------------------*/ |
| 36 | |
| 37 | static 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 | |
| 52 | static 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 | */ |
| 73 | int 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, SA_INTERRUPT); |
| 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 | */ |
| 137 | void 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 | |
| 148 | static int __devinit |
| 149 | ohci_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 | |
| 170 | static 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 | .hub_irq_enable = ohci_rhsc_enable, |
| 205 | #ifdef CONFIG_PM |
| 206 | .bus_suspend = ohci_bus_suspend, |
| 207 | .bus_resume = ohci_bus_resume, |
| 208 | #endif |
| 209 | .start_port_reset = ohci_start_port_reset, |
| 210 | }; |
| 211 | |
| 212 | /*-------------------------------------------------------------------------*/ |
| 213 | |
| 214 | static int ohci_hcd_pnx8550_drv_probe(struct platform_device *pdev) |
| 215 | { |
| 216 | int ret; |
| 217 | |
| 218 | if (usb_disabled()) |
| 219 | return -ENODEV; |
| 220 | |
| 221 | ret = usb_hcd_pnx8550_probe(&ohci_pnx8550_hc_driver, pdev); |
| 222 | return ret; |
| 223 | } |
| 224 | |
| 225 | static int ohci_hcd_pnx8550_drv_remove(struct platform_device *pdev) |
| 226 | { |
| 227 | struct usb_hcd *hcd = platform_get_drvdata(pdev); |
| 228 | |
| 229 | usb_hcd_pnx8550_remove(hcd, pdev); |
| 230 | return 0; |
| 231 | } |
| 232 | |
| 233 | MODULE_ALIAS("pnx8550-ohci"); |
| 234 | |
| 235 | static struct platform_driver ohci_hcd_pnx8550_driver = { |
| 236 | .driver = { |
| 237 | .name = "pnx8550-ohci", |
| 238 | }, |
| 239 | .probe = ohci_hcd_pnx8550_drv_probe, |
| 240 | .remove = ohci_hcd_pnx8550_drv_remove, |
| 241 | }; |
| 242 | |
| 243 | static int __init ohci_hcd_pnx8550_init (void) |
| 244 | { |
| 245 | pr_debug (DRIVER_INFO " (pnx8550)"); |
| 246 | pr_debug ("block sizes: ed %d td %d\n", |
| 247 | sizeof (struct ed), sizeof (struct td)); |
| 248 | |
| 249 | return platform_driver_register(&ohci_hcd_pnx8550_driver); |
| 250 | } |
| 251 | |
| 252 | static void __exit ohci_hcd_pnx8550_cleanup (void) |
| 253 | { |
| 254 | platform_driver_unregister(&ohci_hcd_pnx8550_driver); |
| 255 | } |
| 256 | |
| 257 | module_init (ohci_hcd_pnx8550_init); |
| 258 | module_exit (ohci_hcd_pnx8550_cleanup); |