1 #include <common.h> 2 #include <watchdog.h> 3 #include <asm/errno.h> 4 #include <linux/usb/ch9.h> 5 #include <linux/usb/gadget.h> 6 7 #include <usb.h> 8 #include "linux-compat.h" 9 #include "usb-compat.h" 10 #include "musb_core.h" 11 #include "musb_host.h" 12 #include "musb_gadget.h" 13 14 #ifdef CONFIG_MUSB_HOST 15 struct int_queue { 16 struct usb_host_endpoint hep; 17 struct urb urb; 18 }; 19 20 static struct musb *host; 21 static struct usb_hcd hcd; 22 static enum usb_device_speed host_speed; 23 24 static void musb_host_complete_urb(struct urb *urb) 25 { 26 urb->dev->status &= ~USB_ST_NOT_PROC; 27 urb->dev->act_len = urb->actual_length; 28 } 29 30 static struct usb_host_endpoint hep; 31 static struct urb urb; 32 33 static void construct_urb(struct urb *urb, struct usb_host_endpoint *hep, 34 struct usb_device *dev, int endpoint_type, 35 unsigned long pipe, void *buffer, int len, 36 struct devrequest *setup, int interval) 37 { 38 int epnum = usb_pipeendpoint(pipe); 39 int is_in = usb_pipein(pipe); 40 41 memset(urb, 0, sizeof(struct urb)); 42 memset(hep, 0, sizeof(struct usb_host_endpoint)); 43 INIT_LIST_HEAD(&hep->urb_list); 44 INIT_LIST_HEAD(&urb->urb_list); 45 urb->ep = hep; 46 urb->complete = musb_host_complete_urb; 47 urb->status = -EINPROGRESS; 48 urb->dev = dev; 49 urb->pipe = pipe; 50 urb->transfer_buffer = buffer; 51 urb->transfer_dma = (unsigned long)buffer; 52 urb->transfer_buffer_length = len; 53 urb->setup_packet = (unsigned char *)setup; 54 55 urb->ep->desc.wMaxPacketSize = 56 __cpu_to_le16(is_in ? dev->epmaxpacketin[epnum] : 57 dev->epmaxpacketout[epnum]); 58 urb->ep->desc.bmAttributes = endpoint_type; 59 urb->ep->desc.bEndpointAddress = 60 (is_in ? USB_DIR_IN : USB_DIR_OUT) | epnum; 61 urb->ep->desc.bInterval = interval; 62 } 63 64 static int submit_urb(struct usb_hcd *hcd, struct urb *urb) 65 { 66 struct musb *host = hcd->hcd_priv; 67 int ret; 68 unsigned long timeout; 69 70 ret = musb_urb_enqueue(hcd, urb, 0); 71 if (ret < 0) { 72 printf("Failed to enqueue URB to controller\n"); 73 return ret; 74 } 75 76 timeout = get_timer(0) + USB_TIMEOUT_MS(urb->pipe); 77 do { 78 if (ctrlc()) 79 return -EIO; 80 host->isr(0, host); 81 } while (urb->status == -EINPROGRESS && 82 get_timer(0) < timeout); 83 84 if (urb->status == -EINPROGRESS) 85 musb_urb_dequeue(hcd, urb, -ETIME); 86 87 return urb->status; 88 } 89 90 int submit_control_msg(struct usb_device *dev, unsigned long pipe, 91 void *buffer, int len, struct devrequest *setup) 92 { 93 construct_urb(&urb, &hep, dev, USB_ENDPOINT_XFER_CONTROL, pipe, 94 buffer, len, setup, 0); 95 96 /* Fix speed for non hub-attached devices */ 97 if (!dev->parent) 98 dev->speed = host_speed; 99 100 return submit_urb(&hcd, &urb); 101 } 102 103 104 int submit_bulk_msg(struct usb_device *dev, unsigned long pipe, 105 void *buffer, int len) 106 { 107 construct_urb(&urb, &hep, dev, USB_ENDPOINT_XFER_BULK, pipe, 108 buffer, len, NULL, 0); 109 return submit_urb(&hcd, &urb); 110 } 111 112 int submit_int_msg(struct usb_device *dev, unsigned long pipe, 113 void *buffer, int len, int interval) 114 { 115 construct_urb(&urb, &hep, dev, USB_ENDPOINT_XFER_INT, pipe, 116 buffer, len, NULL, interval); 117 return submit_urb(&hcd, &urb); 118 } 119 120 struct int_queue *create_int_queue(struct usb_device *dev, unsigned long pipe, 121 int queuesize, int elementsize, void *buffer, int interval) 122 { 123 struct int_queue *queue; 124 int ret, index = usb_pipein(pipe) * 16 + usb_pipeendpoint(pipe); 125 126 if (queuesize != 1) { 127 printf("ERROR musb int-queues only support queuesize 1\n"); 128 return NULL; 129 } 130 131 if (dev->int_pending & (1 << index)) { 132 printf("ERROR int-urb is already pending on pipe %lx\n", pipe); 133 return NULL; 134 } 135 136 queue = malloc(sizeof(*queue)); 137 if (!queue) 138 return NULL; 139 140 construct_urb(&queue->urb, &queue->hep, dev, USB_ENDPOINT_XFER_INT, 141 pipe, buffer, elementsize, NULL, interval); 142 143 ret = musb_urb_enqueue(&hcd, &queue->urb, 0); 144 if (ret < 0) { 145 printf("Failed to enqueue URB to controller\n"); 146 free(queue); 147 return NULL; 148 } 149 150 dev->int_pending |= 1 << index; 151 return queue; 152 } 153 154 int destroy_int_queue(struct usb_device *dev, struct int_queue *queue) 155 { 156 int index = usb_pipein(queue->urb.pipe) * 16 + 157 usb_pipeendpoint(queue->urb.pipe); 158 159 if (queue->urb.status == -EINPROGRESS) 160 musb_urb_dequeue(&hcd, &queue->urb, -ETIME); 161 162 dev->int_pending &= ~(1 << index); 163 free(queue); 164 return 0; 165 } 166 167 void *poll_int_queue(struct usb_device *dev, struct int_queue *queue) 168 { 169 if (queue->urb.status != -EINPROGRESS) 170 return NULL; /* URB has already completed in a prev. poll */ 171 172 host->isr(0, host); 173 174 if (queue->urb.status != -EINPROGRESS) 175 return queue->urb.transfer_buffer; /* Done */ 176 177 return NULL; /* URB still pending */ 178 } 179 180 void usb_reset_root_port(void) 181 { 182 void *mbase = host->mregs; 183 u8 power; 184 185 power = musb_readb(mbase, MUSB_POWER); 186 power &= 0xf0; 187 musb_writeb(mbase, MUSB_POWER, MUSB_POWER_RESET | power); 188 mdelay(50); 189 power = musb_readb(mbase, MUSB_POWER); 190 musb_writeb(mbase, MUSB_POWER, ~MUSB_POWER_RESET & power); 191 host->isr(0, host); 192 host_speed = (musb_readb(mbase, MUSB_POWER) & MUSB_POWER_HSMODE) ? 193 USB_SPEED_HIGH : 194 (musb_readb(mbase, MUSB_DEVCTL) & MUSB_DEVCTL_FSDEV) ? 195 USB_SPEED_FULL : USB_SPEED_LOW; 196 mdelay((host_speed == USB_SPEED_LOW) ? 200 : 50); 197 } 198 199 int usb_lowlevel_init(int index, enum usb_init_type init, void **controller) 200 { 201 void *mbase; 202 /* USB spec says it may take up to 1 second for a device to connect */ 203 unsigned long timeout = get_timer(0) + 1000; 204 205 if (!host) { 206 printf("MUSB host is not registered\n"); 207 return -ENODEV; 208 } 209 210 musb_start(host); 211 mbase = host->mregs; 212 do { 213 if (musb_readb(mbase, MUSB_DEVCTL) & MUSB_DEVCTL_HM) 214 break; 215 } while (get_timer(0) < timeout); 216 if (get_timer(0) >= timeout) 217 return -ENODEV; 218 219 usb_reset_root_port(); 220 host->is_active = 1; 221 hcd.hcd_priv = host; 222 223 return 0; 224 } 225 226 int usb_lowlevel_stop(int index) 227 { 228 if (!host) { 229 printf("MUSB host is not registered\n"); 230 return -ENODEV; 231 } 232 233 musb_stop(host); 234 return 0; 235 } 236 #endif /* CONFIG_MUSB_HOST */ 237 238 #ifdef CONFIG_MUSB_GADGET 239 static struct musb *gadget; 240 241 int usb_gadget_handle_interrupts(void) 242 { 243 WATCHDOG_RESET(); 244 if (!gadget || !gadget->isr) 245 return -EINVAL; 246 247 return gadget->isr(0, gadget); 248 } 249 250 int usb_gadget_register_driver(struct usb_gadget_driver *driver) 251 { 252 int ret; 253 254 if (!driver || driver->speed < USB_SPEED_FULL || !driver->bind || 255 !driver->setup) { 256 printf("bad parameter.\n"); 257 return -EINVAL; 258 } 259 260 if (!gadget) { 261 printf("Controller uninitialized\n"); 262 return -ENXIO; 263 } 264 265 ret = musb_gadget_start(&gadget->g, driver); 266 if (ret < 0) { 267 printf("gadget_start failed with %d\n", ret); 268 return ret; 269 } 270 271 ret = driver->bind(&gadget->g); 272 if (ret < 0) { 273 printf("bind failed with %d\n", ret); 274 return ret; 275 } 276 277 return 0; 278 } 279 280 int usb_gadget_unregister_driver(struct usb_gadget_driver *driver) 281 { 282 if (driver->disconnect) 283 driver->disconnect(&gadget->g); 284 if (driver->unbind) 285 driver->unbind(&gadget->g); 286 return 0; 287 } 288 #endif /* CONFIG_MUSB_GADGET */ 289 290 int musb_register(struct musb_hdrc_platform_data *plat, void *bdata, 291 void *ctl_regs) 292 { 293 struct musb **musbp; 294 295 switch (plat->mode) { 296 #ifdef CONFIG_MUSB_HOST 297 case MUSB_HOST: 298 musbp = &host; 299 break; 300 #endif 301 #ifdef CONFIG_MUSB_GADGET 302 case MUSB_PERIPHERAL: 303 musbp = &gadget; 304 break; 305 #endif 306 default: 307 return -EINVAL; 308 } 309 310 *musbp = musb_init_controller(plat, (struct device *)bdata, ctl_regs); 311 if (!musbp) { 312 printf("Failed to init the controller\n"); 313 return -EIO; 314 } 315 316 return 0; 317 } 318