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 pxa27x 9 * 10 * Written by Christopher Hoover <ch@hpl.hp.com> 11 * Based on fragments of previous driver by Russell King et al. 12 * 13 * Modified for LH7A404 from ohci-sa1111.c 14 * by Durgesh Pattamatta <pattamattad@sharpsec.com> 15 * 16 * Modified for pxa27x from ohci-lh7a404.c 17 * by Nick Bane <nick@cecomputing.co.uk> 26-8-2004 18 * 19 * This file is licenced under the GPL. 20 */ 21 22 #include <linux/device.h> 23 #include <linux/signal.h> 24 #include <linux/platform_device.h> 25 26 #include <asm/mach-types.h> 27 #include <asm/hardware.h> 28 #include <asm/arch/pxa-regs.h> 29 #include <asm/arch/ohci.h> 30 31 #define PXA_UHC_MAX_PORTNUM 3 32 33 #define UHCRHPS(x) __REG2( 0x4C000050, (x)<<2 ) 34 35 /* 36 PMM_NPS_MODE -- PMM Non-power switching mode 37 Ports are powered continuously. 38 39 PMM_GLOBAL_MODE -- PMM global switching mode 40 All ports are powered at the same time. 41 42 PMM_PERPORT_MODE -- PMM per port switching mode 43 Ports are powered individually. 44 */ 45 static int pxa27x_ohci_select_pmm( int mode ) 46 { 47 switch ( mode ) { 48 case PMM_NPS_MODE: 49 UHCRHDA |= RH_A_NPS; 50 break; 51 case PMM_GLOBAL_MODE: 52 UHCRHDA &= ~(RH_A_NPS & RH_A_PSM); 53 break; 54 case PMM_PERPORT_MODE: 55 UHCRHDA &= ~(RH_A_NPS); 56 UHCRHDA |= RH_A_PSM; 57 58 /* Set port power control mask bits, only 3 ports. */ 59 UHCRHDB |= (0x7<<17); 60 break; 61 default: 62 printk( KERN_ERR 63 "Invalid mode %d, set to non-power switch mode.\n", 64 mode ); 65 66 UHCRHDA |= RH_A_NPS; 67 } 68 69 return 0; 70 } 71 72 extern int usb_disabled(void); 73 74 /*-------------------------------------------------------------------------*/ 75 76 static int pxa27x_start_hc(struct device *dev) 77 { 78 int retval = 0; 79 struct pxaohci_platform_data *inf; 80 81 inf = dev->platform_data; 82 83 pxa_set_cken(CKEN10_USBHOST, 1); 84 85 UHCHR |= UHCHR_FHR; 86 udelay(11); 87 UHCHR &= ~UHCHR_FHR; 88 89 UHCHR |= UHCHR_FSBIR; 90 while (UHCHR & UHCHR_FSBIR) 91 cpu_relax(); 92 93 if (inf->init) 94 retval = inf->init(dev); 95 96 if (retval < 0) 97 return retval; 98 99 UHCHR &= ~UHCHR_SSE; 100 101 UHCHIE = (UHCHIE_UPRIE | UHCHIE_RWIE); 102 103 /* Clear any OTG Pin Hold */ 104 if (PSSR & PSSR_OTGPH) 105 PSSR |= PSSR_OTGPH; 106 107 return 0; 108 } 109 110 static void pxa27x_stop_hc(struct device *dev) 111 { 112 struct pxaohci_platform_data *inf; 113 114 inf = dev->platform_data; 115 116 if (inf->exit) 117 inf->exit(dev); 118 119 UHCHR |= UHCHR_FHR; 120 udelay(11); 121 UHCHR &= ~UHCHR_FHR; 122 123 UHCCOMS |= 1; 124 udelay(10); 125 126 pxa_set_cken(CKEN10_USBHOST, 0); 127 } 128 129 130 /*-------------------------------------------------------------------------*/ 131 132 /* configure so an HC device and id are always provided */ 133 /* always called with process context; sleeping is OK */ 134 135 136 /** 137 * usb_hcd_pxa27x_probe - initialize pxa27x-based HCDs 138 * Context: !in_interrupt() 139 * 140 * Allocates basic resources for this USB host controller, and 141 * then invokes the start() method for the HCD associated with it 142 * through the hotplug entry's driver_data. 143 * 144 */ 145 int usb_hcd_pxa27x_probe (const struct hc_driver *driver, struct platform_device *pdev) 146 { 147 int retval; 148 struct usb_hcd *hcd; 149 struct pxaohci_platform_data *inf; 150 151 inf = pdev->dev.platform_data; 152 153 if (!inf) 154 return -ENODEV; 155 156 if (pdev->resource[1].flags != IORESOURCE_IRQ) { 157 pr_debug ("resource[1] is not IORESOURCE_IRQ"); 158 return -ENOMEM; 159 } 160 161 hcd = usb_create_hcd (driver, &pdev->dev, "pxa27x"); 162 if (!hcd) 163 return -ENOMEM; 164 hcd->rsrc_start = pdev->resource[0].start; 165 hcd->rsrc_len = pdev->resource[0].end - pdev->resource[0].start + 1; 166 167 if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len, hcd_name)) { 168 pr_debug("request_mem_region failed"); 169 retval = -EBUSY; 170 goto err1; 171 } 172 173 hcd->regs = ioremap(hcd->rsrc_start, hcd->rsrc_len); 174 if (!hcd->regs) { 175 pr_debug("ioremap failed"); 176 retval = -ENOMEM; 177 goto err2; 178 } 179 180 if ((retval = pxa27x_start_hc(&pdev->dev)) < 0) { 181 pr_debug("pxa27x_start_hc failed"); 182 goto err3; 183 } 184 185 /* Select Power Management Mode */ 186 pxa27x_ohci_select_pmm(inf->port_mode); 187 188 if (inf->power_budget) 189 hcd->power_budget = inf->power_budget; 190 191 ohci_hcd_init(hcd_to_ohci(hcd)); 192 193 retval = usb_add_hcd(hcd, pdev->resource[1].start, SA_INTERRUPT); 194 if (retval == 0) 195 return retval; 196 197 pxa27x_stop_hc(&pdev->dev); 198 err3: 199 iounmap(hcd->regs); 200 err2: 201 release_mem_region(hcd->rsrc_start, hcd->rsrc_len); 202 err1: 203 usb_put_hcd(hcd); 204 return retval; 205 } 206 207 208 /* may be called without controller electrically present */ 209 /* may be called with controller, bus, and devices active */ 210 211 /** 212 * usb_hcd_pxa27x_remove - shutdown processing for pxa27x-based HCDs 213 * @dev: USB Host Controller being removed 214 * Context: !in_interrupt() 215 * 216 * Reverses the effect of usb_hcd_pxa27x_probe(), first invoking 217 * the HCD's stop() method. It is always called from a thread 218 * context, normally "rmmod", "apmd", or something similar. 219 * 220 */ 221 void usb_hcd_pxa27x_remove (struct usb_hcd *hcd, struct platform_device *pdev) 222 { 223 usb_remove_hcd(hcd); 224 pxa27x_stop_hc(&pdev->dev); 225 iounmap(hcd->regs); 226 release_mem_region(hcd->rsrc_start, hcd->rsrc_len); 227 usb_put_hcd(hcd); 228 } 229 230 /*-------------------------------------------------------------------------*/ 231 232 static int __devinit 233 ohci_pxa27x_start (struct usb_hcd *hcd) 234 { 235 struct ohci_hcd *ohci = hcd_to_ohci (hcd); 236 int ret; 237 238 ohci_dbg (ohci, "ohci_pxa27x_start, ohci:%p", ohci); 239 240 /* The value of NDP in roothub_a is incorrect on this hardware */ 241 ohci->num_ports = 3; 242 243 if ((ret = ohci_init(ohci)) < 0) 244 return ret; 245 246 if ((ret = ohci_run (ohci)) < 0) { 247 err ("can't start %s", hcd->self.bus_name); 248 ohci_stop (hcd); 249 return ret; 250 } 251 252 return 0; 253 } 254 255 /*-------------------------------------------------------------------------*/ 256 257 static const struct hc_driver ohci_pxa27x_hc_driver = { 258 .description = hcd_name, 259 .product_desc = "PXA27x OHCI", 260 .hcd_priv_size = sizeof(struct ohci_hcd), 261 262 /* 263 * generic hardware linkage 264 */ 265 .irq = ohci_irq, 266 .flags = HCD_USB11 | HCD_MEMORY, 267 268 /* 269 * basic lifecycle operations 270 */ 271 .start = ohci_pxa27x_start, 272 .stop = ohci_stop, 273 274 /* 275 * managing i/o requests and associated device resources 276 */ 277 .urb_enqueue = ohci_urb_enqueue, 278 .urb_dequeue = ohci_urb_dequeue, 279 .endpoint_disable = ohci_endpoint_disable, 280 281 /* 282 * scheduling support 283 */ 284 .get_frame_number = ohci_get_frame, 285 286 /* 287 * root hub support 288 */ 289 .hub_status_data = ohci_hub_status_data, 290 .hub_control = ohci_hub_control, 291 #ifdef CONFIG_PM 292 .bus_suspend = ohci_bus_suspend, 293 .bus_resume = ohci_bus_resume, 294 #endif 295 .start_port_reset = ohci_start_port_reset, 296 }; 297 298 /*-------------------------------------------------------------------------*/ 299 300 static int ohci_hcd_pxa27x_drv_probe(struct platform_device *pdev) 301 { 302 pr_debug ("In ohci_hcd_pxa27x_drv_probe"); 303 304 if (usb_disabled()) 305 return -ENODEV; 306 307 return usb_hcd_pxa27x_probe(&ohci_pxa27x_hc_driver, pdev); 308 } 309 310 static int ohci_hcd_pxa27x_drv_remove(struct platform_device *pdev) 311 { 312 struct usb_hcd *hcd = platform_get_drvdata(pdev); 313 314 usb_hcd_pxa27x_remove(hcd, pdev); 315 platform_set_drvdata(pdev, NULL); 316 return 0; 317 } 318 319 #ifdef CONFIG_PM 320 static int ohci_hcd_pxa27x_drv_suspend(struct platform_device *pdev, pm_message_t state) 321 { 322 struct usb_hcd *hcd = platform_get_drvdata(pdev); 323 struct ohci_hcd *ohci = hcd_to_ohci(hcd); 324 325 if (time_before(jiffies, ohci->next_statechange)) 326 msleep(5); 327 ohci->next_statechange = jiffies; 328 329 pxa27x_stop_hc(&pdev->dev); 330 hcd->state = HC_STATE_SUSPENDED; 331 pdev->dev.power.power_state = PMSG_SUSPEND; 332 333 return 0; 334 } 335 336 static int ohci_hcd_pxa27x_drv_resume(struct platform_device *pdev) 337 { 338 struct usb_hcd *hcd = platform_get_drvdata(pdev); 339 struct ohci_hcd *ohci = hcd_to_ohci(hcd); 340 int status; 341 342 if (time_before(jiffies, ohci->next_statechange)) 343 msleep(5); 344 ohci->next_statechange = jiffies; 345 346 if ((status = pxa27x_start_hc(&pdev->dev)) < 0) 347 return status; 348 349 pdev->dev.power.power_state = PMSG_ON; 350 usb_hcd_resume_root_hub(hcd); 351 352 return 0; 353 } 354 #endif 355 356 357 static struct platform_driver ohci_hcd_pxa27x_driver = { 358 .probe = ohci_hcd_pxa27x_drv_probe, 359 .remove = ohci_hcd_pxa27x_drv_remove, 360 #ifdef CONFIG_PM 361 .suspend = ohci_hcd_pxa27x_drv_suspend, 362 .resume = ohci_hcd_pxa27x_drv_resume, 363 #endif 364 .driver = { 365 .name = "pxa27x-ohci", 366 }, 367 }; 368 369 static int __init ohci_hcd_pxa27x_init (void) 370 { 371 pr_debug (DRIVER_INFO " (pxa27x)"); 372 pr_debug ("block sizes: ed %d td %d\n", 373 sizeof (struct ed), sizeof (struct td)); 374 375 return platform_driver_register(&ohci_hcd_pxa27x_driver); 376 } 377 378 static void __exit ohci_hcd_pxa27x_cleanup (void) 379 { 380 platform_driver_unregister(&ohci_hcd_pxa27x_driver); 381 } 382 383 module_init (ohci_hcd_pxa27x_init); 384 module_exit (ohci_hcd_pxa27x_cleanup); 385