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