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 <asm/mach-types.h> 24 #include <asm/hardware.h> 25 #include <asm/arch/pxa-regs.h> 26 27 28 #define PMM_NPS_MODE 1 29 #define PMM_GLOBAL_MODE 2 30 #define PMM_PERPORT_MODE 3 31 32 #define PXA_UHC_MAX_PORTNUM 3 33 34 #define UHCRHPS(x) __REG2( 0x4C000050, (x)<<2 ) 35 36 static int pxa27x_ohci_pmm_state; 37 38 /* 39 PMM_NPS_MODE -- PMM Non-power switching mode 40 Ports are powered continuously. 41 42 PMM_GLOBAL_MODE -- PMM global switching mode 43 All ports are powered at the same time. 44 45 PMM_PERPORT_MODE -- PMM per port switching mode 46 Ports are powered individually. 47 */ 48 static int pxa27x_ohci_select_pmm( int mode ) 49 { 50 pxa27x_ohci_pmm_state = mode; 51 52 switch ( mode ) { 53 case PMM_NPS_MODE: 54 UHCRHDA |= RH_A_NPS; 55 break; 56 case PMM_GLOBAL_MODE: 57 UHCRHDA &= ~(RH_A_NPS & RH_A_PSM); 58 break; 59 case PMM_PERPORT_MODE: 60 UHCRHDA &= ~(RH_A_NPS); 61 UHCRHDA |= RH_A_PSM; 62 63 /* Set port power control mask bits, only 3 ports. */ 64 UHCRHDB |= (0x7<<17); 65 break; 66 default: 67 printk( KERN_ERR 68 "Invalid mode %d, set to non-power switch mode.\n", 69 mode ); 70 71 pxa27x_ohci_pmm_state = PMM_NPS_MODE; 72 UHCRHDA |= RH_A_NPS; 73 } 74 75 return 0; 76 } 77 78 /* 79 If you select PMM_PERPORT_MODE, you should set the port power 80 */ 81 static int pxa27x_ohci_set_port_power( int port ) 82 { 83 if ( (pxa27x_ohci_pmm_state==PMM_PERPORT_MODE) 84 && (port>0) && (port<PXA_UHC_MAX_PORTNUM) ) { 85 UHCRHPS(port) |= 0x100; 86 return 0; 87 } 88 return -1; 89 } 90 91 /* 92 If you select PMM_PERPORT_MODE, you should set the port power 93 */ 94 static int pxa27x_ohci_clear_port_power( int port ) 95 { 96 if ( (pxa27x_ohci_pmm_state==PMM_PERPORT_MODE) 97 && (port>0) && (port<PXA_UHC_MAX_PORTNUM) ) { 98 UHCRHPS(port) |= 0x200; 99 return 0; 100 } 101 102 return -1; 103 } 104 105 extern int usb_disabled(void); 106 107 /*-------------------------------------------------------------------------*/ 108 109 static void pxa27x_start_hc(struct platform_device *dev) 110 { 111 pxa_set_cken(CKEN10_USBHOST, 1); 112 113 UHCHR |= UHCHR_FHR; 114 udelay(11); 115 UHCHR &= ~UHCHR_FHR; 116 117 UHCHR |= UHCHR_FSBIR; 118 while (UHCHR & UHCHR_FSBIR) 119 cpu_relax(); 120 121 /* This could be properly abstracted away through the 122 device data the day more machines are supported and 123 their differences can be figured out correctly. */ 124 if (machine_is_mainstone()) { 125 /* setup Port1 GPIO pin. */ 126 pxa_gpio_mode( 88 | GPIO_ALT_FN_1_IN); /* USBHPWR1 */ 127 pxa_gpio_mode( 89 | GPIO_ALT_FN_2_OUT); /* USBHPEN1 */ 128 129 /* Set the Power Control Polarity Low and Power Sense 130 Polarity Low to active low. Supply power to USB ports. */ 131 UHCHR = (UHCHR | UHCHR_PCPL | UHCHR_PSPL) & 132 ~(UHCHR_SSEP1 | UHCHR_SSEP2 | UHCHR_SSEP3 | UHCHR_SSE); 133 } 134 135 UHCHR &= ~UHCHR_SSE; 136 137 UHCHIE = (UHCHIE_UPRIE | UHCHIE_RWIE); 138 } 139 140 static void pxa27x_stop_hc(struct platform_device *dev) 141 { 142 UHCHR |= UHCHR_FHR; 143 udelay(11); 144 UHCHR &= ~UHCHR_FHR; 145 146 UHCCOMS |= 1; 147 udelay(10); 148 149 pxa_set_cken(CKEN10_USBHOST, 0); 150 } 151 152 153 /*-------------------------------------------------------------------------*/ 154 155 /* configure so an HC device and id are always provided */ 156 /* always called with process context; sleeping is OK */ 157 158 159 /** 160 * usb_hcd_pxa27x_probe - initialize pxa27x-based HCDs 161 * Context: !in_interrupt() 162 * 163 * Allocates basic resources for this USB host controller, and 164 * then invokes the start() method for the HCD associated with it 165 * through the hotplug entry's driver_data. 166 * 167 */ 168 int usb_hcd_pxa27x_probe (const struct hc_driver *driver, 169 struct platform_device *dev) 170 { 171 int retval; 172 struct usb_hcd *hcd; 173 174 if (dev->resource[1].flags != IORESOURCE_IRQ) { 175 pr_debug ("resource[1] is not IORESOURCE_IRQ"); 176 return -ENOMEM; 177 } 178 179 hcd = usb_create_hcd (driver, &dev->dev, "pxa27x"); 180 if (!hcd) 181 return -ENOMEM; 182 hcd->rsrc_start = dev->resource[0].start; 183 hcd->rsrc_len = dev->resource[0].end - dev->resource[0].start + 1; 184 185 if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len, hcd_name)) { 186 pr_debug("request_mem_region failed"); 187 retval = -EBUSY; 188 goto err1; 189 } 190 191 hcd->regs = ioremap(hcd->rsrc_start, hcd->rsrc_len); 192 if (!hcd->regs) { 193 pr_debug("ioremap failed"); 194 retval = -ENOMEM; 195 goto err2; 196 } 197 198 pxa27x_start_hc(dev); 199 200 /* Select Power Management Mode */ 201 pxa27x_ohci_select_pmm( PMM_PERPORT_MODE ); 202 203 /* If choosing PMM_PERPORT_MODE, we should set the port power before we use it. */ 204 if (pxa27x_ohci_set_port_power(1) < 0) 205 printk(KERN_ERR "Setting port 1 power failed.\n"); 206 207 if (pxa27x_ohci_clear_port_power(2) < 0) 208 printk(KERN_ERR "Setting port 2 power failed.\n"); 209 210 if (pxa27x_ohci_clear_port_power(3) < 0) 211 printk(KERN_ERR "Setting port 3 power failed.\n"); 212 213 ohci_hcd_init(hcd_to_ohci(hcd)); 214 215 retval = usb_add_hcd(hcd, dev->resource[1].start, SA_INTERRUPT); 216 if (retval == 0) 217 return retval; 218 219 pxa27x_stop_hc(dev); 220 iounmap(hcd->regs); 221 err2: 222 release_mem_region(hcd->rsrc_start, hcd->rsrc_len); 223 err1: 224 usb_put_hcd(hcd); 225 return retval; 226 } 227 228 229 /* may be called without controller electrically present */ 230 /* may be called with controller, bus, and devices active */ 231 232 /** 233 * usb_hcd_pxa27x_remove - shutdown processing for pxa27x-based HCDs 234 * @dev: USB Host Controller being removed 235 * Context: !in_interrupt() 236 * 237 * Reverses the effect of usb_hcd_pxa27x_probe(), first invoking 238 * the HCD's stop() method. It is always called from a thread 239 * context, normally "rmmod", "apmd", or something similar. 240 * 241 */ 242 void usb_hcd_pxa27x_remove (struct usb_hcd *hcd, struct platform_device *dev) 243 { 244 usb_remove_hcd(hcd); 245 pxa27x_stop_hc(dev); 246 iounmap(hcd->regs); 247 release_mem_region(hcd->rsrc_start, hcd->rsrc_len); 248 usb_put_hcd(hcd); 249 } 250 251 /*-------------------------------------------------------------------------*/ 252 253 static int __devinit 254 ohci_pxa27x_start (struct usb_hcd *hcd) 255 { 256 struct ohci_hcd *ohci = hcd_to_ohci (hcd); 257 int ret; 258 259 ohci_dbg (ohci, "ohci_pxa27x_start, ohci:%p", ohci); 260 261 if ((ret = ohci_init(ohci)) < 0) 262 return ret; 263 264 if ((ret = ohci_run (ohci)) < 0) { 265 err ("can't start %s", hcd->self.bus_name); 266 ohci_stop (hcd); 267 return ret; 268 } 269 270 return 0; 271 } 272 273 /*-------------------------------------------------------------------------*/ 274 275 static const struct hc_driver ohci_pxa27x_hc_driver = { 276 .description = hcd_name, 277 .product_desc = "PXA27x OHCI", 278 .hcd_priv_size = sizeof(struct ohci_hcd), 279 280 /* 281 * generic hardware linkage 282 */ 283 .irq = ohci_irq, 284 .flags = HCD_USB11 | HCD_MEMORY, 285 286 /* 287 * basic lifecycle operations 288 */ 289 .start = ohci_pxa27x_start, 290 .stop = ohci_stop, 291 292 /* 293 * managing i/o requests and associated device resources 294 */ 295 .urb_enqueue = ohci_urb_enqueue, 296 .urb_dequeue = ohci_urb_dequeue, 297 .endpoint_disable = ohci_endpoint_disable, 298 299 /* 300 * scheduling support 301 */ 302 .get_frame_number = ohci_get_frame, 303 304 /* 305 * root hub support 306 */ 307 .hub_status_data = ohci_hub_status_data, 308 .hub_control = ohci_hub_control, 309 #ifdef CONFIG_USB_SUSPEND 310 .hub_suspend = ohci_hub_suspend, 311 .hub_resume = ohci_hub_resume, 312 #endif 313 }; 314 315 /*-------------------------------------------------------------------------*/ 316 317 static int ohci_hcd_pxa27x_drv_probe(struct device *dev) 318 { 319 struct platform_device *pdev = to_platform_device(dev); 320 int ret; 321 322 pr_debug ("In ohci_hcd_pxa27x_drv_probe"); 323 324 if (usb_disabled()) 325 return -ENODEV; 326 327 ret = usb_hcd_pxa27x_probe(&ohci_pxa27x_hc_driver, pdev); 328 return ret; 329 } 330 331 static int ohci_hcd_pxa27x_drv_remove(struct device *dev) 332 { 333 struct platform_device *pdev = to_platform_device(dev); 334 struct usb_hcd *hcd = dev_get_drvdata(dev); 335 336 usb_hcd_pxa27x_remove(hcd, pdev); 337 return 0; 338 } 339 340 static int ohci_hcd_pxa27x_drv_suspend(struct device *dev, pm_message_t state, u32 level) 341 { 342 // struct platform_device *pdev = to_platform_device(dev); 343 // struct usb_hcd *hcd = dev_get_drvdata(dev); 344 printk("%s: not implemented yet\n", __FUNCTION__); 345 346 return 0; 347 } 348 349 static int ohci_hcd_pxa27x_drv_resume(struct device *dev, u32 level) 350 { 351 // struct platform_device *pdev = to_platform_device(dev); 352 // struct usb_hcd *hcd = dev_get_drvdata(dev); 353 printk("%s: not implemented yet\n", __FUNCTION__); 354 355 return 0; 356 } 357 358 359 static struct device_driver ohci_hcd_pxa27x_driver = { 360 .name = "pxa27x-ohci", 361 .bus = &platform_bus_type, 362 .probe = ohci_hcd_pxa27x_drv_probe, 363 .remove = ohci_hcd_pxa27x_drv_remove, 364 .suspend = ohci_hcd_pxa27x_drv_suspend, 365 .resume = ohci_hcd_pxa27x_drv_resume, 366 }; 367 368 static int __init ohci_hcd_pxa27x_init (void) 369 { 370 pr_debug (DRIVER_INFO " (pxa27x)"); 371 pr_debug ("block sizes: ed %d td %d\n", 372 sizeof (struct ed), sizeof (struct td)); 373 374 return driver_register(&ohci_hcd_pxa27x_driver); 375 } 376 377 static void __exit ohci_hcd_pxa27x_cleanup (void) 378 { 379 driver_unregister(&ohci_hcd_pxa27x_driver); 380 } 381 382 module_init (ohci_hcd_pxa27x_init); 383 module_exit (ohci_hcd_pxa27x_cleanup); 384