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 extern int usb_disabled(void); 79 80 /*-------------------------------------------------------------------------*/ 81 82 static void pxa27x_start_hc(struct platform_device *dev) 83 { 84 pxa_set_cken(CKEN10_USBHOST, 1); 85 86 UHCHR |= UHCHR_FHR; 87 udelay(11); 88 UHCHR &= ~UHCHR_FHR; 89 90 UHCHR |= UHCHR_FSBIR; 91 while (UHCHR & UHCHR_FSBIR) 92 cpu_relax(); 93 94 /* This could be properly abstracted away through the 95 device data the day more machines are supported and 96 their differences can be figured out correctly. */ 97 if (machine_is_mainstone()) { 98 /* setup Port1 GPIO pin. */ 99 pxa_gpio_mode( 88 | GPIO_ALT_FN_1_IN); /* USBHPWR1 */ 100 pxa_gpio_mode( 89 | GPIO_ALT_FN_2_OUT); /* USBHPEN1 */ 101 102 /* Set the Power Control Polarity Low and Power Sense 103 Polarity Low to active low. Supply power to USB ports. */ 104 UHCHR = (UHCHR | UHCHR_PCPL | UHCHR_PSPL) & 105 ~(UHCHR_SSEP1 | UHCHR_SSEP2 | UHCHR_SSEP3 | UHCHR_SSE); 106 107 pxa27x_ohci_pmm_state = PMM_PERPORT_MODE; 108 } 109 110 UHCHR &= ~UHCHR_SSE; 111 112 UHCHIE = (UHCHIE_UPRIE | UHCHIE_RWIE); 113 114 /* Clear any OTG Pin Hold */ 115 if (PSSR & PSSR_OTGPH) 116 PSSR |= PSSR_OTGPH; 117 } 118 119 static void pxa27x_stop_hc(struct platform_device *dev) 120 { 121 UHCHR |= UHCHR_FHR; 122 udelay(11); 123 UHCHR &= ~UHCHR_FHR; 124 125 UHCCOMS |= 1; 126 udelay(10); 127 128 pxa_set_cken(CKEN10_USBHOST, 0); 129 } 130 131 132 /*-------------------------------------------------------------------------*/ 133 134 /* configure so an HC device and id are always provided */ 135 /* always called with process context; sleeping is OK */ 136 137 138 /** 139 * usb_hcd_pxa27x_probe - initialize pxa27x-based HCDs 140 * Context: !in_interrupt() 141 * 142 * Allocates basic resources for this USB host controller, and 143 * then invokes the start() method for the HCD associated with it 144 * through the hotplug entry's driver_data. 145 * 146 */ 147 int usb_hcd_pxa27x_probe (const struct hc_driver *driver, 148 struct platform_device *dev) 149 { 150 int retval; 151 struct usb_hcd *hcd; 152 153 if (dev->resource[1].flags != IORESOURCE_IRQ) { 154 pr_debug ("resource[1] is not IORESOURCE_IRQ"); 155 return -ENOMEM; 156 } 157 158 hcd = usb_create_hcd (driver, &dev->dev, "pxa27x"); 159 if (!hcd) 160 return -ENOMEM; 161 hcd->rsrc_start = dev->resource[0].start; 162 hcd->rsrc_len = dev->resource[0].end - dev->resource[0].start + 1; 163 164 if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len, hcd_name)) { 165 pr_debug("request_mem_region failed"); 166 retval = -EBUSY; 167 goto err1; 168 } 169 170 hcd->regs = ioremap(hcd->rsrc_start, hcd->rsrc_len); 171 if (!hcd->regs) { 172 pr_debug("ioremap failed"); 173 retval = -ENOMEM; 174 goto err2; 175 } 176 177 pxa27x_start_hc(dev); 178 179 /* Select Power Management Mode */ 180 pxa27x_ohci_select_pmm(pxa27x_ohci_pmm_state); 181 182 ohci_hcd_init(hcd_to_ohci(hcd)); 183 184 retval = usb_add_hcd(hcd, dev->resource[1].start, SA_INTERRUPT); 185 if (retval == 0) 186 return retval; 187 188 pxa27x_stop_hc(dev); 189 iounmap(hcd->regs); 190 err2: 191 release_mem_region(hcd->rsrc_start, hcd->rsrc_len); 192 err1: 193 usb_put_hcd(hcd); 194 return retval; 195 } 196 197 198 /* may be called without controller electrically present */ 199 /* may be called with controller, bus, and devices active */ 200 201 /** 202 * usb_hcd_pxa27x_remove - shutdown processing for pxa27x-based HCDs 203 * @dev: USB Host Controller being removed 204 * Context: !in_interrupt() 205 * 206 * Reverses the effect of usb_hcd_pxa27x_probe(), first invoking 207 * the HCD's stop() method. It is always called from a thread 208 * context, normally "rmmod", "apmd", or something similar. 209 * 210 */ 211 void usb_hcd_pxa27x_remove (struct usb_hcd *hcd, struct platform_device *dev) 212 { 213 usb_remove_hcd(hcd); 214 pxa27x_stop_hc(dev); 215 iounmap(hcd->regs); 216 release_mem_region(hcd->rsrc_start, hcd->rsrc_len); 217 usb_put_hcd(hcd); 218 } 219 220 /*-------------------------------------------------------------------------*/ 221 222 static int __devinit 223 ohci_pxa27x_start (struct usb_hcd *hcd) 224 { 225 struct ohci_hcd *ohci = hcd_to_ohci (hcd); 226 int ret; 227 228 ohci_dbg (ohci, "ohci_pxa27x_start, ohci:%p", ohci); 229 230 /* The value of NDP in roothub_a is incorrect on this hardware */ 231 ohci->num_ports = 3; 232 233 if ((ret = ohci_init(ohci)) < 0) 234 return ret; 235 236 if ((ret = ohci_run (ohci)) < 0) { 237 err ("can't start %s", hcd->self.bus_name); 238 ohci_stop (hcd); 239 return ret; 240 } 241 242 return 0; 243 } 244 245 /*-------------------------------------------------------------------------*/ 246 247 static const struct hc_driver ohci_pxa27x_hc_driver = { 248 .description = hcd_name, 249 .product_desc = "PXA27x OHCI", 250 .hcd_priv_size = sizeof(struct ohci_hcd), 251 252 /* 253 * generic hardware linkage 254 */ 255 .irq = ohci_irq, 256 .flags = HCD_USB11 | HCD_MEMORY, 257 258 /* 259 * basic lifecycle operations 260 */ 261 .start = ohci_pxa27x_start, 262 .stop = ohci_stop, 263 264 /* 265 * managing i/o requests and associated device resources 266 */ 267 .urb_enqueue = ohci_urb_enqueue, 268 .urb_dequeue = ohci_urb_dequeue, 269 .endpoint_disable = ohci_endpoint_disable, 270 271 /* 272 * scheduling support 273 */ 274 .get_frame_number = ohci_get_frame, 275 276 /* 277 * root hub support 278 */ 279 .hub_status_data = ohci_hub_status_data, 280 .hub_control = ohci_hub_control, 281 #ifdef CONFIG_USB_SUSPEND 282 .hub_suspend = ohci_hub_suspend, 283 .hub_resume = ohci_hub_resume, 284 #endif 285 }; 286 287 /*-------------------------------------------------------------------------*/ 288 289 static int ohci_hcd_pxa27x_drv_probe(struct device *dev) 290 { 291 struct platform_device *pdev = to_platform_device(dev); 292 int ret; 293 294 pr_debug ("In ohci_hcd_pxa27x_drv_probe"); 295 296 if (usb_disabled()) 297 return -ENODEV; 298 299 ret = usb_hcd_pxa27x_probe(&ohci_pxa27x_hc_driver, pdev); 300 return ret; 301 } 302 303 static int ohci_hcd_pxa27x_drv_remove(struct device *dev) 304 { 305 struct platform_device *pdev = to_platform_device(dev); 306 struct usb_hcd *hcd = dev_get_drvdata(dev); 307 308 usb_hcd_pxa27x_remove(hcd, pdev); 309 return 0; 310 } 311 312 static int ohci_hcd_pxa27x_drv_suspend(struct device *dev, pm_message_t state, u32 level) 313 { 314 // struct platform_device *pdev = to_platform_device(dev); 315 // struct usb_hcd *hcd = dev_get_drvdata(dev); 316 printk("%s: not implemented yet\n", __FUNCTION__); 317 318 return 0; 319 } 320 321 static int ohci_hcd_pxa27x_drv_resume(struct device *dev, u32 level) 322 { 323 // struct platform_device *pdev = to_platform_device(dev); 324 // struct usb_hcd *hcd = dev_get_drvdata(dev); 325 printk("%s: not implemented yet\n", __FUNCTION__); 326 327 return 0; 328 } 329 330 331 static struct device_driver ohci_hcd_pxa27x_driver = { 332 .name = "pxa27x-ohci", 333 .bus = &platform_bus_type, 334 .probe = ohci_hcd_pxa27x_drv_probe, 335 .remove = ohci_hcd_pxa27x_drv_remove, 336 .suspend = ohci_hcd_pxa27x_drv_suspend, 337 .resume = ohci_hcd_pxa27x_drv_resume, 338 }; 339 340 static int __init ohci_hcd_pxa27x_init (void) 341 { 342 pr_debug (DRIVER_INFO " (pxa27x)"); 343 pr_debug ("block sizes: ed %d td %d\n", 344 sizeof (struct ed), sizeof (struct td)); 345 346 return driver_register(&ohci_hcd_pxa27x_driver); 347 } 348 349 static void __exit ohci_hcd_pxa27x_cleanup (void) 350 { 351 driver_unregister(&ohci_hcd_pxa27x_driver); 352 } 353 354 module_init (ohci_hcd_pxa27x_init); 355 module_exit (ohci_hcd_pxa27x_cleanup); 356