huang lin | 365250e | 2014-08-06 16:43:43 +0800 | [diff] [blame^] | 1 | /* |
| 2 | * This file is part of the coreboot project. |
| 3 | * |
| 4 | * Copyright (C) 2014 Rockchip Electronics |
| 5 | * |
| 6 | * This program is free software; you can redistribute it and/or modify |
| 7 | * it under the terms of the GNU General Public License as published by |
| 8 | * the Free Software Foundation; version 2 of the License. |
| 9 | * |
| 10 | * This program is distributed in the hope that it will be useful, |
| 11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 13 | * GNU General Public License 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 |
| 17 | * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
| 18 | */ |
| 19 | |
| 20 | #include <libpayload.h> |
| 21 | #include <arch/cache.h> |
| 22 | |
| 23 | #include "dwc2.h" |
| 24 | #include "dwc2_private.h" |
| 25 | |
| 26 | static void dummy(hci_t *controller) |
| 27 | { |
| 28 | } |
| 29 | |
| 30 | static void dwc2_reinit(hci_t *controller) |
| 31 | { |
| 32 | dwc2_reg_t *reg = DWC2_REG(controller); |
| 33 | gusbcfg_t gusbcfg = { .d32 = 0 }; |
| 34 | grstctl_t grstctl = { .d32 = 0 }; |
| 35 | gintsts_t gintsts = { .d32 = 0 }; |
| 36 | gahbcfg_t gahbcfg = { .d32 = 0 }; |
| 37 | grxfsiz_t grxfsiz = { .d32 = 0 }; |
| 38 | hcintmsk_t hcintmsk = { .d32 = 0 }; |
| 39 | gnptxfsiz_t gnptxfsiz = { .d32 = 0 }; |
| 40 | |
| 41 | const int timeout = 10000; |
| 42 | int i; |
| 43 | |
| 44 | /* Wait for AHB idle */ |
| 45 | for (i = 0; i < timeout; i++) { |
| 46 | udelay(1); |
| 47 | grstctl.d32 = readl(®->core.grstctl); |
| 48 | if (grstctl.ahbidle) |
| 49 | break; |
| 50 | } |
| 51 | if (i == timeout) |
| 52 | fatal("DWC2 Init error AHB Idle\n"); |
| 53 | |
| 54 | /* Restart the Phy Clock */ |
| 55 | writel(0x0, ®->pcgr.pcgcctl); |
| 56 | /* Core soft reset */ |
| 57 | grstctl.csftrst = 1; |
| 58 | writel(grstctl.d32, ®->core.grstctl); |
| 59 | for (i = 0; i < timeout; i++) { |
| 60 | udelay(1); |
| 61 | grstctl.d32 = readl(®->core.grstctl); |
| 62 | if (!grstctl.csftrst) |
| 63 | break; |
| 64 | } |
| 65 | if (i == timeout) |
| 66 | fatal("DWC2 Init error reset fail\n"); |
| 67 | |
| 68 | /* Set 16bit PHY if & Force host mode */ |
| 69 | gusbcfg.d32 = readl(®->core.gusbcfg); |
| 70 | gusbcfg.phyif = 1; |
| 71 | gusbcfg.forcehstmode = 1; |
| 72 | gusbcfg.forcedevmode = 0; |
| 73 | writel(gusbcfg.d32, ®->core.gusbcfg); |
| 74 | /* Wait for force host mode effect, it may takes 100ms */ |
| 75 | for (i = 0; i < timeout; i++) { |
| 76 | udelay(10); |
| 77 | gintsts.d32 = readl(®->core.gintsts); |
| 78 | if (gintsts.curmod) |
| 79 | break; |
| 80 | } |
| 81 | if (i == timeout) |
| 82 | fatal("DWC2 Init error force host mode fail\n"); |
| 83 | |
| 84 | /* |
| 85 | * Config FIFO |
| 86 | * The non-periodic tx fifo and rx fifo share one continuous |
| 87 | * piece of IP-internal SRAM. |
| 88 | */ |
| 89 | grxfsiz.rxfdep = DWC2_RXFIFO_DEPTH; |
| 90 | writel(grxfsiz.d32, ®->core.grxfsiz); |
| 91 | gnptxfsiz.nptxfstaddr = DWC2_RXFIFO_DEPTH; |
| 92 | gnptxfsiz.nptxfdep = DWC2_NPTXFIFO_DEPTH; |
| 93 | writel(gnptxfsiz.d32, ®->core.gnptxfsiz); |
| 94 | |
| 95 | /* Init host channels */ |
| 96 | hcintmsk.xfercomp = 1; |
| 97 | hcintmsk.xacterr = 1; |
| 98 | hcintmsk.stall = 1; |
| 99 | hcintmsk.chhltd = 1; |
| 100 | hcintmsk.bblerr = 1; |
| 101 | for (i = 0; i < MAX_EPS_CHANNELS; i++) |
| 102 | writel(hcintmsk.d32, ®->host.hchn[i].hcintmaskn); |
| 103 | |
| 104 | /* Unmask interrupt and configure DMA mode */ |
| 105 | gahbcfg.glblintrmsk = 1; |
| 106 | gahbcfg.hbstlen = DMA_BURST_INCR8; |
| 107 | gahbcfg.dmaen = 1; |
| 108 | writel(gahbcfg.d32, ®->core.gahbcfg); |
| 109 | |
| 110 | DWC2_INST(controller)->hprt0 = ®->host.hprt; |
| 111 | |
| 112 | usb_debug("DWC2 init finished!\n"); |
| 113 | } |
| 114 | |
| 115 | static void dwc2_shutdown(hci_t *controller) |
| 116 | { |
| 117 | detach_controller(controller); |
| 118 | free(DWC2_INST(controller)->dma_buffer); |
| 119 | free(DWC2_INST(controller)); |
| 120 | free(controller); |
| 121 | } |
| 122 | |
| 123 | /* |
| 124 | * This function returns the actual transfer length when the transfer succeeded |
| 125 | * or an error code if the transfer failed |
| 126 | */ |
| 127 | static int |
| 128 | wait_for_complete(endpoint_t *ep, uint32_t ch_num) |
| 129 | { |
| 130 | hcint_t hcint; |
| 131 | hcchar_t hcchar; |
| 132 | hctsiz_t hctsiz; |
| 133 | dwc2_reg_t *reg = DWC2_REG(ep->dev->controller); |
| 134 | int timeout = 600000; /* time out after 600000 * 5us == 3s */ |
| 135 | |
| 136 | /* |
| 137 | * TODO: We should take care of up to three times of transfer error |
| 138 | * retry here, according to the USB 2.0 spec 4.5.2 |
| 139 | */ |
| 140 | do { |
| 141 | udelay(5); |
| 142 | hcint.d32 = readl(®->host.hchn[ch_num].hcintn); |
| 143 | hctsiz.d32 = readl(®->host.hchn[ch_num].hctsizn); |
| 144 | |
| 145 | if (hcint.chhltd) { |
| 146 | writel(hcint.d32, ®->host.hchn[ch_num].hcintn); |
| 147 | |
| 148 | if (hcint.xfercomp) |
| 149 | return hctsiz.xfersize; |
| 150 | else if (hcint.xacterr) |
| 151 | return -HCSTAT_XFERERR; |
| 152 | else if (hcint.bblerr) |
| 153 | return -HCSTAT_BABBLE; |
| 154 | else if (hcint.stall) |
| 155 | return -HCSTAT_STALL; |
| 156 | else |
| 157 | return -HCSTAT_UNKNOW; |
| 158 | } |
| 159 | } while (timeout--); |
| 160 | |
| 161 | /* Release the channel on timeout */ |
| 162 | hcchar.d32 = readl(®->host.hchn[ch_num].hccharn); |
| 163 | if (hcchar.chen) { |
| 164 | /* |
| 165 | * Programming the HCCHARn register with the chdis and |
| 166 | * chena bits set to 1 at the same time to disable the |
| 167 | * channel and the core will generate a channel halted |
| 168 | * interrupt. |
| 169 | */ |
| 170 | hcchar.chdis = 1; |
| 171 | writel(hcchar.d32, ®->host.hchn[ch_num].hccharn); |
| 172 | do { |
| 173 | hcchar.d32 = readl(®->host.hchn[ch_num].hccharn); |
| 174 | } while (hcchar.chen); |
| 175 | |
| 176 | } |
| 177 | |
| 178 | /* Clear all pending interrupt flags */ |
| 179 | hcint.d32 = ~0; |
| 180 | writel(hcint.d32, ®->host.hchn[ch_num].hcintn); |
| 181 | |
| 182 | return -HCSTAT_TIMEOUT; |
| 183 | } |
| 184 | |
| 185 | static int |
| 186 | dwc2_transfer(endpoint_t *ep, int size, int pid, ep_dir_t dir, |
| 187 | uint32_t ch_num, u8 *data_buf) |
| 188 | { |
| 189 | uint32_t do_copy; |
| 190 | int ret; |
| 191 | uint32_t packet_cnt; |
| 192 | uint32_t packet_size; |
| 193 | uint32_t transferred = 0; |
| 194 | uint32_t inpkt_length; |
| 195 | hctsiz_t hctsiz = { .d32 = 0 }; |
| 196 | hcchar_t hcchar = { .d32 = 0 }; |
| 197 | void *aligned_buf; |
| 198 | dwc2_reg_t *reg = DWC2_REG(ep->dev->controller); |
| 199 | |
| 200 | packet_size = ep->maxpacketsize; |
| 201 | packet_cnt = ALIGN_UP(size, packet_size) / packet_size; |
| 202 | inpkt_length = packet_cnt * packet_size; |
| 203 | /* At least 1 packet should be programed */ |
| 204 | packet_cnt = (packet_cnt == 0) ? 1 : packet_cnt; |
| 205 | |
| 206 | /* |
| 207 | * For an IN, this field is the buffer size that the application has |
| 208 | * reserved for the transfer. The application should program this field |
| 209 | * as integer multiple of the maximum packet size for IN transactions. |
| 210 | */ |
| 211 | hctsiz.xfersize = (dir == EPDIR_OUT) ? size : inpkt_length; |
| 212 | hctsiz.pktcnt = packet_cnt; |
| 213 | hctsiz.pid = pid; |
| 214 | |
| 215 | hcchar.mps = packet_size; |
| 216 | hcchar.epnum = ep->endpoint & 0xf; |
| 217 | hcchar.epdir = dir; |
| 218 | hcchar.eptype = ep->type; |
| 219 | hcchar.multicnt = 1; |
| 220 | hcchar.devaddr = ep->dev->address; |
| 221 | hcchar.chdis = 0; |
| 222 | hcchar.chen = 1; |
| 223 | |
| 224 | if (size > DMA_SIZE) { |
| 225 | usb_debug("Transfer too large: %d\n", size); |
| 226 | return -1; |
| 227 | } |
| 228 | |
| 229 | /* |
| 230 | * Check the buffer address which should be 4-byte aligned and DMA |
| 231 | * coherent |
| 232 | */ |
| 233 | do_copy = !dma_coherent(data_buf) || ((uintptr_t)data_buf & 0x3); |
| 234 | aligned_buf = do_copy ? DWC2_INST(ep->dev->controller)->dma_buffer : |
| 235 | data_buf; |
| 236 | |
| 237 | if (do_copy && (dir == EPDIR_OUT)) |
| 238 | memcpy(aligned_buf, data_buf, size); |
| 239 | |
| 240 | writel(hctsiz.d32, ®->host.hchn[ch_num].hctsizn); |
| 241 | writel((uint32_t)aligned_buf, ®->host.hchn[ch_num].hcdman); |
| 242 | writel(hcchar.d32, ®->host.hchn[ch_num].hccharn); |
| 243 | |
| 244 | ret = wait_for_complete(ep, ch_num); |
| 245 | |
| 246 | if (ret >= 0) { |
| 247 | /* Calculate actual transferred length */ |
| 248 | transferred = (dir == EPDIR_IN) ? inpkt_length - ret : ret; |
| 249 | |
| 250 | if (do_copy && (dir == EPDIR_IN)) |
| 251 | memcpy(data_buf, aligned_buf, transferred); |
| 252 | } |
| 253 | |
| 254 | /* Save data toggle */ |
| 255 | hctsiz.d32 = readl(®->host.hchn[ch_num].hctsizn); |
| 256 | ep->toggle = hctsiz.pid; |
| 257 | |
| 258 | if (ret < 0) { |
| 259 | usb_debug("%s Transfer stop code: %x\n", __func__, ret); |
| 260 | return ret; |
| 261 | } |
| 262 | return transferred; |
| 263 | } |
| 264 | |
| 265 | static int |
| 266 | dwc2_bulk(endpoint_t *ep, int size, u8 *src, int finalize) |
| 267 | { |
| 268 | ep_dir_t data_dir; |
| 269 | |
| 270 | if (ep->direction == IN) |
| 271 | data_dir = EPDIR_IN; |
| 272 | else if (ep->direction == OUT) |
| 273 | data_dir = EPDIR_OUT; |
| 274 | else |
| 275 | return -1; |
| 276 | |
| 277 | return dwc2_transfer(ep, size, ep->toggle, data_dir, 0, src); |
| 278 | } |
| 279 | |
| 280 | static int |
| 281 | dwc2_control(usbdev_t *dev, direction_t dir, int drlen, void *setup, |
| 282 | int dalen, u8 *src) |
| 283 | { |
| 284 | int ret = 0; |
| 285 | |
| 286 | ep_dir_t data_dir; |
| 287 | |
| 288 | if (dir == IN) |
| 289 | data_dir = EPDIR_IN; |
| 290 | else if (dir == OUT) |
| 291 | data_dir = EPDIR_OUT; |
| 292 | else |
| 293 | return -1; |
| 294 | |
| 295 | /* Setup Phase */ |
| 296 | if (dwc2_transfer(&dev->endpoints[0], drlen, PID_SETUP, EPDIR_OUT, 0, |
| 297 | setup) < 0) |
| 298 | return -1; |
| 299 | /* Data Phase */ |
| 300 | if (dalen > 0) { |
| 301 | ret = dwc2_transfer(&dev->endpoints[0], dalen, PID_DATA1, |
| 302 | data_dir, 0, src); |
| 303 | if (ret < 0) |
| 304 | return -1; |
| 305 | } |
| 306 | /* Status Phase */ |
| 307 | if (dwc2_transfer(&dev->endpoints[0], 0, PID_DATA1, !data_dir, 0, |
| 308 | NULL) < 0) |
| 309 | return -1; |
| 310 | |
| 311 | return ret; |
| 312 | } |
| 313 | |
| 314 | hci_t *dwc2_init(void *bar) |
| 315 | { |
| 316 | hci_t *controller = new_controller(); |
| 317 | controller->instance = xzalloc(sizeof(dwc_ctrl_t)); |
| 318 | |
| 319 | DWC2_INST(controller)->dma_buffer = dma_malloc(DMA_SIZE); |
| 320 | if (!DWC2_INST(controller)->dma_buffer) { |
| 321 | usb_debug("Not enough DMA memory for DWC2 bounce buffer\n"); |
| 322 | goto free_dwc2; |
| 323 | } |
| 324 | |
| 325 | controller->type = DWC2; |
| 326 | controller->start = dummy; |
| 327 | controller->stop = dummy; |
| 328 | controller->reset = dummy; |
| 329 | controller->init = dwc2_reinit; |
| 330 | controller->shutdown = dwc2_shutdown; |
| 331 | controller->bulk = dwc2_bulk; |
| 332 | controller->control = dwc2_control; |
| 333 | controller->set_address = generic_set_address; |
| 334 | controller->finish_device_config = NULL; |
| 335 | controller->destroy_device = NULL; |
| 336 | controller->create_intr_queue = NULL; |
| 337 | controller->destroy_intr_queue = NULL; |
| 338 | controller->poll_intr_queue = NULL; |
| 339 | controller->reg_base = (uintptr_t)bar; |
| 340 | init_device_entry(controller, 0); |
| 341 | |
| 342 | /* Init controller */ |
| 343 | controller->init(controller); |
| 344 | |
| 345 | /* Setup up root hub */ |
| 346 | controller->devices[0]->controller = controller; |
| 347 | controller->devices[0]->init = dwc2_rh_init; |
| 348 | controller->devices[0]->init(controller->devices[0]); |
| 349 | return controller; |
| 350 | |
| 351 | free_dwc2: |
| 352 | detach_controller(controller); |
| 353 | free(DWC2_INST(controller)); |
| 354 | free(controller); |
| 355 | return NULL; |
| 356 | } |