1 /* 2 * Freescale QUICC Engine USB Host Controller Driver 3 * 4 * Copyright (c) Freescale Semicondutor, Inc. 2006. 5 * Shlomi Gridish <gridish@freescale.com> 6 * Jerry Huang <Chang-Ming.Huang@freescale.com> 7 * Copyright (c) Logic Product Development, Inc. 2007 8 * Peter Barada <peterb@logicpd.com> 9 * Copyright (c) MontaVista Software, Inc. 2008. 10 * Anton Vorontsov <avorontsov@ru.mvista.com> 11 * 12 * This program is free software; you can redistribute it and/or modify it 13 * under the terms of the GNU General Public License as published by the 14 * Free Software Foundation; either version 2 of the License, or (at your 15 * option) any later version. 16 */ 17 18 #include <linux/kernel.h> 19 #include <linux/types.h> 20 #include <linux/spinlock.h> 21 #include <linux/delay.h> 22 #include <linux/errno.h> 23 #include <linux/io.h> 24 #include <linux/usb.h> 25 #include <linux/usb/hcd.h> 26 #include <linux/gpio.h> 27 #include <asm/qe.h> 28 #include "fhci.h" 29 30 /* virtual root hub specific descriptor */ 31 static u8 root_hub_des[] = { 32 0x09, /* blength */ 33 0x29, /* bDescriptorType;hub-descriptor */ 34 0x01, /* bNbrPorts */ 35 HUB_CHAR_INDV_PORT_LPSM | HUB_CHAR_NO_OCPM, /* wHubCharacteristics */ 36 0x00, /* per-port power, no overcurrent */ 37 0x01, /* bPwrOn2pwrGood;2ms */ 38 0x00, /* bHubContrCurrent;0mA */ 39 0x00, /* DeviceRemoveable */ 40 0xff, /* PortPwrCtrlMask */ 41 }; 42 43 static void fhci_gpio_set_value(struct fhci_hcd *fhci, int gpio_nr, bool on) 44 { 45 int gpio = fhci->gpios[gpio_nr]; 46 bool alow = fhci->alow_gpios[gpio_nr]; 47 48 if (!gpio_is_valid(gpio)) 49 return; 50 51 gpio_set_value(gpio, on ^ alow); 52 mdelay(5); 53 } 54 55 void fhci_config_transceiver(struct fhci_hcd *fhci, 56 enum fhci_port_status status) 57 { 58 fhci_dbg(fhci, "-> %s: %d\n", __func__, status); 59 60 switch (status) { 61 case FHCI_PORT_POWER_OFF: 62 fhci_gpio_set_value(fhci, GPIO_POWER, false); 63 break; 64 case FHCI_PORT_DISABLED: 65 case FHCI_PORT_WAITING: 66 fhci_gpio_set_value(fhci, GPIO_POWER, true); 67 break; 68 case FHCI_PORT_LOW: 69 fhci_gpio_set_value(fhci, GPIO_SPEED, false); 70 break; 71 case FHCI_PORT_FULL: 72 fhci_gpio_set_value(fhci, GPIO_SPEED, true); 73 break; 74 default: 75 WARN_ON(1); 76 break; 77 } 78 79 fhci_dbg(fhci, "<- %s: %d\n", __func__, status); 80 } 81 82 /* disable the USB port by clearing the EN bit in the USBMOD register */ 83 void fhci_port_disable(struct fhci_hcd *fhci) 84 { 85 struct fhci_usb *usb = (struct fhci_usb *)fhci->usb_lld; 86 enum fhci_port_status port_status; 87 88 fhci_dbg(fhci, "-> %s\n", __func__); 89 90 fhci_stop_sof_timer(fhci); 91 92 fhci_flush_all_transmissions(usb); 93 94 fhci_usb_disable_interrupt((struct fhci_usb *)fhci->usb_lld); 95 port_status = usb->port_status; 96 usb->port_status = FHCI_PORT_DISABLED; 97 98 /* Enable IDLE since we want to know if something comes along */ 99 usb->saved_msk |= USB_E_IDLE_MASK; 100 out_be16(&usb->fhci->regs->usb_usbmr, usb->saved_msk); 101 102 /* check if during the disconnection process attached new device */ 103 if (port_status == FHCI_PORT_WAITING) 104 fhci_device_connected_interrupt(fhci); 105 usb->vroot_hub->port.wPortStatus &= ~USB_PORT_STAT_ENABLE; 106 usb->vroot_hub->port.wPortChange |= USB_PORT_STAT_C_ENABLE; 107 fhci_usb_enable_interrupt((struct fhci_usb *)fhci->usb_lld); 108 109 fhci_dbg(fhci, "<- %s\n", __func__); 110 } 111 112 /* enable the USB port by setting the EN bit in the USBMOD register */ 113 void fhci_port_enable(void *lld) 114 { 115 struct fhci_usb *usb = (struct fhci_usb *)lld; 116 struct fhci_hcd *fhci = usb->fhci; 117 118 fhci_dbg(fhci, "-> %s\n", __func__); 119 120 fhci_config_transceiver(fhci, usb->port_status); 121 122 if ((usb->port_status != FHCI_PORT_FULL) && 123 (usb->port_status != FHCI_PORT_LOW)) 124 fhci_start_sof_timer(fhci); 125 126 usb->vroot_hub->port.wPortStatus |= USB_PORT_STAT_ENABLE; 127 usb->vroot_hub->port.wPortChange |= USB_PORT_STAT_C_ENABLE; 128 129 fhci_dbg(fhci, "<- %s\n", __func__); 130 } 131 132 void fhci_io_port_generate_reset(struct fhci_hcd *fhci) 133 { 134 fhci_dbg(fhci, "-> %s\n", __func__); 135 136 gpio_direction_output(fhci->gpios[GPIO_USBOE], 0); 137 gpio_direction_output(fhci->gpios[GPIO_USBTP], 0); 138 gpio_direction_output(fhci->gpios[GPIO_USBTN], 0); 139 140 mdelay(5); 141 142 qe_pin_set_dedicated(fhci->pins[PIN_USBOE]); 143 qe_pin_set_dedicated(fhci->pins[PIN_USBTP]); 144 qe_pin_set_dedicated(fhci->pins[PIN_USBTN]); 145 146 fhci_dbg(fhci, "<- %s\n", __func__); 147 } 148 149 /* generate the RESET condition on the bus */ 150 void fhci_port_reset(void *lld) 151 { 152 struct fhci_usb *usb = (struct fhci_usb *)lld; 153 struct fhci_hcd *fhci = usb->fhci; 154 u8 mode; 155 u16 mask; 156 157 fhci_dbg(fhci, "-> %s\n", __func__); 158 159 fhci_stop_sof_timer(fhci); 160 /* disable the USB controller */ 161 mode = in_8(&fhci->regs->usb_usmod); 162 out_8(&fhci->regs->usb_usmod, mode & (~USB_MODE_EN)); 163 164 /* disable idle interrupts */ 165 mask = in_be16(&fhci->regs->usb_usbmr); 166 out_be16(&fhci->regs->usb_usbmr, mask & (~USB_E_IDLE_MASK)); 167 168 fhci_io_port_generate_reset(fhci); 169 170 /* enable interrupt on this endpoint */ 171 out_be16(&fhci->regs->usb_usbmr, mask); 172 173 /* enable the USB controller */ 174 mode = in_8(&fhci->regs->usb_usmod); 175 out_8(&fhci->regs->usb_usmod, mode | USB_MODE_EN); 176 fhci_start_sof_timer(fhci); 177 178 fhci_dbg(fhci, "<- %s\n", __func__); 179 } 180 181 int fhci_hub_status_data(struct usb_hcd *hcd, char *buf) 182 { 183 struct fhci_hcd *fhci = hcd_to_fhci(hcd); 184 int ret = 0; 185 unsigned long flags; 186 187 fhci_dbg(fhci, "-> %s\n", __func__); 188 189 spin_lock_irqsave(&fhci->lock, flags); 190 191 if (fhci->vroot_hub->port.wPortChange & (USB_PORT_STAT_C_CONNECTION | 192 USB_PORT_STAT_C_ENABLE | USB_PORT_STAT_C_SUSPEND | 193 USB_PORT_STAT_C_RESET | USB_PORT_STAT_C_OVERCURRENT)) { 194 *buf = 1 << 1; 195 ret = 1; 196 fhci_dbg(fhci, "-- %s\n", __func__); 197 } 198 199 spin_unlock_irqrestore(&fhci->lock, flags); 200 201 fhci_dbg(fhci, "<- %s\n", __func__); 202 203 return ret; 204 } 205 206 int fhci_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue, 207 u16 wIndex, char *buf, u16 wLength) 208 { 209 struct fhci_hcd *fhci = hcd_to_fhci(hcd); 210 int retval = 0; 211 struct usb_hub_status *hub_status; 212 struct usb_port_status *port_status; 213 unsigned long flags; 214 215 spin_lock_irqsave(&fhci->lock, flags); 216 217 fhci_dbg(fhci, "-> %s\n", __func__); 218 219 switch (typeReq) { 220 case ClearHubFeature: 221 switch (wValue) { 222 case C_HUB_LOCAL_POWER: 223 case C_HUB_OVER_CURRENT: 224 break; 225 default: 226 goto error; 227 } 228 break; 229 case ClearPortFeature: 230 fhci->vroot_hub->feature &= (1 << wValue); 231 232 switch (wValue) { 233 case USB_PORT_FEAT_ENABLE: 234 fhci->vroot_hub->port.wPortStatus &= 235 ~USB_PORT_STAT_ENABLE; 236 fhci_port_disable(fhci); 237 break; 238 case USB_PORT_FEAT_C_ENABLE: 239 fhci->vroot_hub->port.wPortChange &= 240 ~USB_PORT_STAT_C_ENABLE; 241 break; 242 case USB_PORT_FEAT_SUSPEND: 243 fhci->vroot_hub->port.wPortStatus &= 244 ~USB_PORT_STAT_SUSPEND; 245 fhci_stop_sof_timer(fhci); 246 break; 247 case USB_PORT_FEAT_C_SUSPEND: 248 fhci->vroot_hub->port.wPortChange &= 249 ~USB_PORT_STAT_C_SUSPEND; 250 break; 251 case USB_PORT_FEAT_POWER: 252 fhci->vroot_hub->port.wPortStatus &= 253 ~USB_PORT_STAT_POWER; 254 fhci_config_transceiver(fhci, FHCI_PORT_POWER_OFF); 255 break; 256 case USB_PORT_FEAT_C_CONNECTION: 257 fhci->vroot_hub->port.wPortChange &= 258 ~USB_PORT_STAT_C_CONNECTION; 259 break; 260 case USB_PORT_FEAT_C_OVER_CURRENT: 261 fhci->vroot_hub->port.wPortChange &= 262 ~USB_PORT_STAT_C_OVERCURRENT; 263 break; 264 case USB_PORT_FEAT_C_RESET: 265 fhci->vroot_hub->port.wPortChange &= 266 ~USB_PORT_STAT_C_RESET; 267 break; 268 default: 269 goto error; 270 } 271 break; 272 case GetHubDescriptor: 273 memcpy(buf, root_hub_des, sizeof(root_hub_des)); 274 break; 275 case GetHubStatus: 276 hub_status = (struct usb_hub_status *)buf; 277 hub_status->wHubStatus = 278 cpu_to_le16(fhci->vroot_hub->hub.wHubStatus); 279 hub_status->wHubChange = 280 cpu_to_le16(fhci->vroot_hub->hub.wHubChange); 281 break; 282 case GetPortStatus: 283 port_status = (struct usb_port_status *)buf; 284 port_status->wPortStatus = 285 cpu_to_le16(fhci->vroot_hub->port.wPortStatus); 286 port_status->wPortChange = 287 cpu_to_le16(fhci->vroot_hub->port.wPortChange); 288 break; 289 case SetHubFeature: 290 switch (wValue) { 291 case C_HUB_OVER_CURRENT: 292 case C_HUB_LOCAL_POWER: 293 break; 294 default: 295 goto error; 296 } 297 break; 298 case SetPortFeature: 299 fhci->vroot_hub->feature |= (1 << wValue); 300 301 switch (wValue) { 302 case USB_PORT_FEAT_ENABLE: 303 fhci->vroot_hub->port.wPortStatus |= 304 USB_PORT_STAT_ENABLE; 305 fhci_port_enable(fhci->usb_lld); 306 break; 307 case USB_PORT_FEAT_SUSPEND: 308 fhci->vroot_hub->port.wPortStatus |= 309 USB_PORT_STAT_SUSPEND; 310 fhci_stop_sof_timer(fhci); 311 break; 312 case USB_PORT_FEAT_RESET: 313 fhci->vroot_hub->port.wPortStatus |= 314 USB_PORT_STAT_RESET; 315 fhci_port_reset(fhci->usb_lld); 316 fhci->vroot_hub->port.wPortStatus |= 317 USB_PORT_STAT_ENABLE; 318 fhci->vroot_hub->port.wPortStatus &= 319 ~USB_PORT_STAT_RESET; 320 break; 321 case USB_PORT_FEAT_POWER: 322 fhci->vroot_hub->port.wPortStatus |= 323 USB_PORT_STAT_POWER; 324 fhci_config_transceiver(fhci, FHCI_PORT_WAITING); 325 break; 326 default: 327 goto error; 328 } 329 break; 330 default: 331 error: 332 retval = -EPIPE; 333 } 334 335 fhci_dbg(fhci, "<- %s\n", __func__); 336 337 spin_unlock_irqrestore(&fhci->lock, flags); 338 339 return retval; 340 } 341