1 /* 2 * (C) Copyright David Brownell 2000-2002 3 * Copyright (c) 2005 MontaVista Software 4 * 5 * This program is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License as published by the 7 * Free Software Foundation; either version 2 of the License, or (at your 8 * option) any later version. 9 * 10 * This program is distributed in the hope that it will be useful, but 11 * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY 12 * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 13 * for more details. 14 * 15 * You should have received a copy of the GNU General Public License 16 * along with this program; if not, write to the Free Software Foundation, 17 * Inc., 675 Mass Ave, Cambridge, MA 02139, USA. 18 * 19 * Ported to 834x by Randy Vinson <rvinson@mvista.com> using code provided 20 * by Hunter Wu. 21 */ 22 23 #include <linux/platform_device.h> 24 #include <linux/fsl_devices.h> 25 26 #include "ehci-fsl.h" 27 28 /* FIXME: Power Management is un-ported so temporarily disable it */ 29 #undef CONFIG_PM 30 31 /* PCI-based HCs are common, but plenty of non-PCI HCs are used too */ 32 33 /* configure so an HC device and id are always provided */ 34 /* always called with process context; sleeping is OK */ 35 36 /** 37 * usb_hcd_fsl_probe - initialize FSL-based HCDs 38 * @drvier: Driver to be used for this HCD 39 * @pdev: USB Host Controller being probed 40 * Context: !in_interrupt() 41 * 42 * Allocates basic resources for this USB host controller. 43 * 44 */ 45 int usb_hcd_fsl_probe(const struct hc_driver *driver, 46 struct platform_device *pdev) 47 { 48 struct fsl_usb2_platform_data *pdata; 49 struct usb_hcd *hcd; 50 struct resource *res; 51 int irq; 52 int retval; 53 unsigned int temp; 54 55 pr_debug("initializing FSL-SOC USB Controller\n"); 56 57 /* Need platform data for setup */ 58 pdata = (struct fsl_usb2_platform_data *)pdev->dev.platform_data; 59 if (!pdata) { 60 dev_err(&pdev->dev, 61 "No platform data for %s.\n", pdev->dev.bus_id); 62 return -ENODEV; 63 } 64 65 /* 66 * This is a host mode driver, verify that we're supposed to be 67 * in host mode. 68 */ 69 if (!((pdata->operating_mode == FSL_USB2_DR_HOST) || 70 (pdata->operating_mode == FSL_USB2_MPH_HOST) || 71 (pdata->operating_mode == FSL_USB2_DR_OTG))) { 72 dev_err(&pdev->dev, 73 "Non Host Mode configured for %s. Wrong driver linked.\n", 74 pdev->dev.bus_id); 75 return -ENODEV; 76 } 77 78 res = platform_get_resource(pdev, IORESOURCE_IRQ, 0); 79 if (!res) { 80 dev_err(&pdev->dev, 81 "Found HC with no IRQ. Check %s setup!\n", 82 pdev->dev.bus_id); 83 return -ENODEV; 84 } 85 irq = res->start; 86 87 hcd = usb_create_hcd(driver, &pdev->dev, pdev->dev.bus_id); 88 if (!hcd) { 89 retval = -ENOMEM; 90 goto err1; 91 } 92 93 res = platform_get_resource(pdev, IORESOURCE_MEM, 0); 94 if (!res) { 95 dev_err(&pdev->dev, 96 "Found HC with no register addr. Check %s setup!\n", 97 pdev->dev.bus_id); 98 retval = -ENODEV; 99 goto err2; 100 } 101 hcd->rsrc_start = res->start; 102 hcd->rsrc_len = res->end - res->start + 1; 103 if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len, 104 driver->description)) { 105 dev_dbg(&pdev->dev, "controller already in use\n"); 106 retval = -EBUSY; 107 goto err2; 108 } 109 hcd->regs = ioremap(hcd->rsrc_start, hcd->rsrc_len); 110 111 if (hcd->regs == NULL) { 112 dev_dbg(&pdev->dev, "error mapping memory\n"); 113 retval = -EFAULT; 114 goto err3; 115 } 116 117 /* Enable USB controller */ 118 temp = in_be32(hcd->regs + 0x500); 119 out_be32(hcd->regs + 0x500, temp | 0x4); 120 121 /* Set to Host mode */ 122 temp = in_le32(hcd->regs + 0x1a8); 123 out_le32(hcd->regs + 0x1a8, temp | 0x3); 124 125 retval = usb_add_hcd(hcd, irq, IRQF_DISABLED | IRQF_SHARED); 126 if (retval != 0) 127 goto err4; 128 return retval; 129 130 err4: 131 iounmap(hcd->regs); 132 err3: 133 release_mem_region(hcd->rsrc_start, hcd->rsrc_len); 134 err2: 135 usb_put_hcd(hcd); 136 err1: 137 dev_err(&pdev->dev, "init %s fail, %d\n", pdev->dev.bus_id, retval); 138 return retval; 139 } 140 141 /* may be called without controller electrically present */ 142 /* may be called with controller, bus, and devices active */ 143 144 /** 145 * usb_hcd_fsl_remove - shutdown processing for FSL-based HCDs 146 * @dev: USB Host Controller being removed 147 * Context: !in_interrupt() 148 * 149 * Reverses the effect of usb_hcd_fsl_probe(). 150 * 151 */ 152 void usb_hcd_fsl_remove(struct usb_hcd *hcd, struct platform_device *pdev) 153 { 154 usb_remove_hcd(hcd); 155 iounmap(hcd->regs); 156 release_mem_region(hcd->rsrc_start, hcd->rsrc_len); 157 usb_put_hcd(hcd); 158 } 159 160 static void mpc83xx_setup_phy(struct ehci_hcd *ehci, 161 enum fsl_usb2_phy_modes phy_mode, 162 unsigned int port_offset) 163 { 164 u32 portsc = 0; 165 switch (phy_mode) { 166 case FSL_USB2_PHY_ULPI: 167 portsc |= PORT_PTS_ULPI; 168 break; 169 case FSL_USB2_PHY_SERIAL: 170 portsc |= PORT_PTS_SERIAL; 171 break; 172 case FSL_USB2_PHY_UTMI_WIDE: 173 portsc |= PORT_PTS_PTW; 174 /* fall through */ 175 case FSL_USB2_PHY_UTMI: 176 portsc |= PORT_PTS_UTMI; 177 break; 178 case FSL_USB2_PHY_NONE: 179 break; 180 } 181 ehci_writel(ehci, portsc, &ehci->regs->port_status[port_offset]); 182 } 183 184 static void mpc83xx_usb_setup(struct usb_hcd *hcd) 185 { 186 struct ehci_hcd *ehci = hcd_to_ehci(hcd); 187 struct fsl_usb2_platform_data *pdata; 188 void __iomem *non_ehci = hcd->regs; 189 u32 temp; 190 191 pdata = 192 (struct fsl_usb2_platform_data *)hcd->self.controller-> 193 platform_data; 194 /* Enable PHY interface in the control reg. */ 195 temp = in_be32(non_ehci + FSL_SOC_USB_CTRL); 196 out_be32(non_ehci + FSL_SOC_USB_CTRL, temp | 0x00000004); 197 out_be32(non_ehci + FSL_SOC_USB_SNOOP1, 0x0000001b); 198 199 #if defined(CONFIG_PPC32) && !defined(CONFIG_NOT_COHERENT_CACHE) 200 /* 201 * Turn on cache snooping hardware, since some PowerPC platforms 202 * wholly rely on hardware to deal with cache coherent 203 */ 204 205 /* Setup Snooping for all the 4GB space */ 206 /* SNOOP1 starts from 0x0, size 2G */ 207 out_be32(non_ehci + FSL_SOC_USB_SNOOP1, 0x0 | SNOOP_SIZE_2GB); 208 /* SNOOP2 starts from 0x80000000, size 2G */ 209 out_be32(non_ehci + FSL_SOC_USB_SNOOP2, 0x80000000 | SNOOP_SIZE_2GB); 210 #endif 211 212 if ((pdata->operating_mode == FSL_USB2_DR_HOST) || 213 (pdata->operating_mode == FSL_USB2_DR_OTG)) 214 mpc83xx_setup_phy(ehci, pdata->phy_mode, 0); 215 216 if (pdata->operating_mode == FSL_USB2_MPH_HOST) { 217 unsigned int chip, rev, svr; 218 219 svr = mfspr(SPRN_SVR); 220 chip = svr >> 16; 221 rev = (svr >> 4) & 0xf; 222 223 /* Deal with USB Erratum #14 on MPC834x Rev 1.0 & 1.1 chips */ 224 if ((rev == 1) && (chip >= 0x8050) && (chip <= 0x8055)) 225 ehci->has_fsl_port_bug = 1; 226 227 if (pdata->port_enables & FSL_USB2_PORT0_ENABLED) 228 mpc83xx_setup_phy(ehci, pdata->phy_mode, 0); 229 if (pdata->port_enables & FSL_USB2_PORT1_ENABLED) 230 mpc83xx_setup_phy(ehci, pdata->phy_mode, 1); 231 } 232 233 /* put controller in host mode. */ 234 ehci_writel(ehci, 0x00000003, non_ehci + FSL_SOC_USB_USBMODE); 235 out_be32(non_ehci + FSL_SOC_USB_PRICTRL, 0x0000000c); 236 out_be32(non_ehci + FSL_SOC_USB_AGECNTTHRSH, 0x00000040); 237 out_be32(non_ehci + FSL_SOC_USB_SICTRL, 0x00000001); 238 } 239 240 /* called after powerup, by probe or system-pm "wakeup" */ 241 static int ehci_fsl_reinit(struct ehci_hcd *ehci) 242 { 243 mpc83xx_usb_setup(ehci_to_hcd(ehci)); 244 ehci_port_power(ehci, 0); 245 246 return 0; 247 } 248 249 /* called during probe() after chip reset completes */ 250 static int ehci_fsl_setup(struct usb_hcd *hcd) 251 { 252 struct ehci_hcd *ehci = hcd_to_ehci(hcd); 253 int retval; 254 255 /* EHCI registers start at offset 0x100 */ 256 ehci->caps = hcd->regs + 0x100; 257 ehci->regs = hcd->regs + 0x100 + 258 HC_LENGTH(ehci_readl(ehci, &ehci->caps->hc_capbase)); 259 dbg_hcs_params(ehci, "reset"); 260 dbg_hcc_params(ehci, "reset"); 261 262 /* cache this readonly data; minimize chip reads */ 263 ehci->hcs_params = ehci_readl(ehci, &ehci->caps->hcs_params); 264 265 retval = ehci_halt(ehci); 266 if (retval) 267 return retval; 268 269 /* data structure init */ 270 retval = ehci_init(hcd); 271 if (retval) 272 return retval; 273 274 ehci->is_tdi_rh_tt = 1; 275 276 ehci->sbrn = 0x20; 277 278 ehci_reset(ehci); 279 280 retval = ehci_fsl_reinit(ehci); 281 return retval; 282 } 283 284 static const struct hc_driver ehci_fsl_hc_driver = { 285 .description = hcd_name, 286 .product_desc = "Freescale On-Chip EHCI Host Controller", 287 .hcd_priv_size = sizeof(struct ehci_hcd), 288 289 /* 290 * generic hardware linkage 291 */ 292 .irq = ehci_irq, 293 .flags = HCD_USB2, 294 295 /* 296 * basic lifecycle operations 297 */ 298 .reset = ehci_fsl_setup, 299 .start = ehci_run, 300 #ifdef CONFIG_PM 301 .suspend = ehci_bus_suspend, 302 .resume = ehci_bus_resume, 303 #endif 304 .stop = ehci_stop, 305 .shutdown = ehci_shutdown, 306 307 /* 308 * managing i/o requests and associated device resources 309 */ 310 .urb_enqueue = ehci_urb_enqueue, 311 .urb_dequeue = ehci_urb_dequeue, 312 .endpoint_disable = ehci_endpoint_disable, 313 314 /* 315 * scheduling support 316 */ 317 .get_frame_number = ehci_get_frame, 318 319 /* 320 * root hub support 321 */ 322 .hub_status_data = ehci_hub_status_data, 323 .hub_control = ehci_hub_control, 324 .bus_suspend = ehci_bus_suspend, 325 .bus_resume = ehci_bus_resume, 326 .relinquish_port = ehci_relinquish_port, 327 }; 328 329 static int ehci_fsl_drv_probe(struct platform_device *pdev) 330 { 331 if (usb_disabled()) 332 return -ENODEV; 333 334 return usb_hcd_fsl_probe(&ehci_fsl_hc_driver, pdev); 335 } 336 337 static int ehci_fsl_drv_remove(struct platform_device *pdev) 338 { 339 struct usb_hcd *hcd = platform_get_drvdata(pdev); 340 341 usb_hcd_fsl_remove(hcd, pdev); 342 343 return 0; 344 } 345 346 MODULE_ALIAS("fsl-ehci"); 347 348 static struct platform_driver ehci_fsl_driver = { 349 .probe = ehci_fsl_drv_probe, 350 .remove = ehci_fsl_drv_remove, 351 .shutdown = usb_hcd_platform_shutdown, 352 .driver = { 353 .name = "fsl-ehci", 354 }, 355 }; 356