carlfw/usb/main.c

   1 /*
   2  * carl9170 firmware - used by the ar9170 wireless device
   3  *
   4  * Copyright (c) 2000-2005 ZyDAS Technology Corporation
   5  * Copyright (c) 2007-2009 Atheros Communications, Inc.
   6  * Copyright    2009    Johannes Berg <johannes@sipsolutions.net>
   7  * Copyright 2009-2011  Christian Lamparter <chunkeey@googlemail.com>
   8  *
   9  * This program is free software; you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License as published by
  11  * the Free Software Foundation; either version 2 of the License, or
  12  * (at your option) any later version.
  13  *
  14  * This program is distributed in the hope that it will be useful,
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17  * GNU General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU General Public License along
  20  * with this program; if not, write to the Free Software Foundation, Inc.,
  21  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  22  */
  23
  24 #include "carl9170.h"
  25
  26 #include "shared/phy.h"
  27 #include "hostif.h"
  28 #include "printf.h"
  29 #include "timer.h"
  30 #include "rom.h"
  31 #include "wl.h"
  32 #include "wol.h"
  33
  34 #ifdef CONFIG_CARL9170FW_DEBUG_USB
  35 void usb_putc(const char c)
  36 {
  37         fw.usb.put_buffer[fw.usb.put_index++] = (uint8_t) c;
  38
  39         if (fw.usb.put_index == CARL9170_MAX_CMD_PAYLOAD_LEN || c == '\0') {
  40                 fw.usb.put_buffer[fw.usb.put_index] = 0;
  41
  42                 send_cmd_to_host(__roundup(fw.usb.put_index, 4),
  43                                  CARL9170_RSP_TEXT, fw.usb.put_index,
  44                                  fw.usb.put_buffer);
  45                 fw.usb.put_index = 0;
  46         }
  47 }
  48
  49 void usb_print_hex_dump(const void *buf, int len)
  50 {
  51         unsigned int offset = 0, block = 0;
  52         while (len > 0) {
  53                 block = min(__roundup(len, 4), CARL9170_MAX_CMD_PAYLOAD_LEN);
  54
  55                 send_cmd_to_host(block, CARL9170_RSP_HEXDUMP, len,
  56                                  (const uint8_t *) buf + offset);
  57
  58                 offset += block;
  59                 len -= block;
  60         }
  61 }
  62 #endif /* CONFIG_CARL9170FW_DEBUG_USB */
  63
  64 /* grab a buffer from the interrupt in queue ring-buffer */
  65 static struct carl9170_rsp *get_int_buf(void)
  66 {
  67         struct carl9170_rsp *tmp;
  68
  69         /* fetch the _oldest_ buffer from the ring */
  70         tmp = &fw.usb.int_buf[fw.usb.int_tail_index];
  71
  72         /* assign a unique sequence for every response/trap */
  73         tmp->hdr.seq = fw.usb.int_tail_index;
  74
  75         fw.usb.int_tail_index++;
  76
  77         fw.usb.int_tail_index %= CARL9170_INT_RQ_CACHES;
  78         if (fw.usb.int_pending != CARL9170_INT_RQ_CACHES)
  79                 fw.usb.int_pending++;
  80
  81         return tmp;
  82 }
  83
  84 /* Pop up data from Interrupt IN Queue to USB Response buffer */
  85 static struct carl9170_rsp *dequeue_int_buf(unsigned int space)
  86 {
  87         struct carl9170_rsp *tmp = NULL;
  88
  89         if (fw.usb.int_pending > 0) {
  90                 tmp = &fw.usb.int_buf[fw.usb.int_head_index];
  91
  92                 if ((unsigned int)(tmp->hdr.len + 8) > space)
  93                         return NULL;
  94
  95                 fw.usb.int_head_index++;
  96                 fw.usb.int_head_index %= CARL9170_INT_RQ_CACHES;
  97                 fw.usb.int_pending--;
  98         }
  99
 100         return tmp;
 101 }
 102
 103 static void usb_data_in(void)
 104 {
 105 }
 106
 107 static void usb_reg_out(void)
 108 {
 109         uint32_t *regaddr = (uint32_t *) &dma_mem.reserved.cmd;
 110         uint16_t usbfifolen, i;
 111
 112         usb_reset_out();
 113
 114         usbfifolen = getb(AR9170_USB_REG_EP4_BYTE_COUNT_LOW) |
 115                      getb(AR9170_USB_REG_EP4_BYTE_COUNT_HIGH) << 8;
 116
 117         if (usbfifolen & 0x3)
 118                 usbfifolen = (usbfifolen >> 2) + 1;
 119         else
 120                 usbfifolen = usbfifolen >> 2;
 121
 122         for (i = 0; i < usbfifolen; i++)
 123                 *regaddr++ = get(AR9170_USB_REG_EP4_DATA);
 124
 125         handle_cmd(get_int_buf());
 126
 127         usb_trigger_in();
 128 }
 129
 130 static void usb_status_in(void)
 131 {
 132         struct carl9170_rsp *rsp;
 133         unsigned int rem, tlen, elen;
 134
 135         if (!fw.usb.int_desc_available)
 136                 return ;
 137
 138         fw.usb.int_desc_available = 0;
 139
 140         rem = AR9170_BLOCK_SIZE - AR9170_INT_MAGIC_HEADER_SIZE;
 141         tlen = AR9170_INT_MAGIC_HEADER_SIZE;
 142
 143         usb_reset_in();
 144
 145         while (fw.usb.int_pending) {
 146                 rsp = dequeue_int_buf(rem);
 147                 if (!rsp)
 148                         break;
 149
 150                 elen = rsp->hdr.len + 4;
 151
 152                 memcpy(DESC_PAYLOAD_OFF(fw.usb.int_desc, tlen), rsp, elen);
 153
 154                 rem -= elen;
 155                 tlen += elen;
 156         }
 157
 158         if (tlen == AR9170_INT_MAGIC_HEADER_SIZE) {
 159                 DBG("attempted to send an empty int response!\n");
 160                 goto reclaim;
 161         }
 162
 163         fw.usb.int_desc->ctrl = AR9170_CTRL_FS_BIT | AR9170_CTRL_LS_BIT;
 164         fw.usb.int_desc->totalLen = tlen;
 165         fw.usb.int_desc->dataSize = tlen;
 166
 167         /* Put to UpQ */
 168         dma_put(&fw.pta.up_queue, fw.usb.int_desc);
 169
 170         /* Trigger PTA UP DMA */
 171         set(AR9170_PTA_REG_UP_DMA_TRIGGER, 1);
 172         usb_trigger_out();
 173
 174         return ;
 175
 176 reclaim:
 177         /* TODO: not sure what to do here */
 178         fw.usb.int_desc_available = 1;
 179 }
 180
 181 void send_cmd_to_host(const uint8_t len, const uint8_t type,
 182                       const uint8_t ext, const uint8_t *body)
 183 {
 184         struct carl9170_cmd *resp;
 185
 186 #ifdef CONFIG_CARL9170FW_DEBUG
 187         if (unlikely(len > sizeof(resp->data))) {
 188                 DBG("CMD too long:%x %d\n", type, len);
 189                 return ;
 190         }
 191
 192         /* Element length must be a multiple of 4. */
 193         if (unlikely(len & 0x3)) {
 194                 DBG("CMD length not mult. of 4:%x %d\n", type, len);
 195                 return ;
 196         }
 197 #endif /* CONFIG_CARL9170FW_DEBUG */
 198
 199         resp = (struct carl9170_cmd *) get_int_buf();
 200         if (unlikely(resp == NULL)) {
 201                 /* not very helpful for NON UART users */
 202                 DBG("out of msg buffers\n");
 203                 return ;
 204         }
 205
 206         resp->hdr.len = len;
 207         resp->hdr.cmd = type;
 208         resp->hdr.ext = ext;
 209
 210         memcpy(resp->data, body, len);
 211         usb_trigger_in();
 212 }
 213
 214 /* Turn off ADDA/RF power, PLL */
 215 static void turn_power_off(void)
 216 {
 217         set(AR9170_PHY_REG_ACTIVE, AR9170_PHY_ACTIVE_DIS);
 218         set(AR9170_PHY_REG_ADC_CTL, 0xa0000000 |
 219             AR9170_PHY_ADC_CTL_OFF_PWDADC | AR9170_PHY_ADC_CTL_OFF_PWDDAC);
 220
 221         /* This will also turn-off the LEDs */
 222         set(AR9170_GPIO_REG_PORT_DATA, 0);
 223         set(AR9170_GPIO_REG_PORT_TYPE, 0xf);
 224
 225         set(AR9170_PWR_REG_BASE, 0x40021);
 226
 227         set(AR9170_MAC_REG_DMA_TRIGGER, 0);
 228
 229         andl(AR9170_USB_REG_DMA_CTL, ~(AR9170_USB_DMA_CTL_ENABLE_TO_DEVICE |
 230                                        AR9170_USB_DMA_CTL_ENABLE_FROM_DEVICE |
 231                                        AR9170_USB_DMA_CTL_UP_PACKET_MODE |
 232                                        AR9170_USB_DMA_CTL_DOWN_STREAM));
 233
 234         /* Do a software reset to PTA component */
 235         orl(AR9170_PTA_REG_DMA_MODE_CTRL, AR9170_PTA_DMA_MODE_CTRL_RESET);
 236         andl(AR9170_PTA_REG_DMA_MODE_CTRL, ~AR9170_PTA_DMA_MODE_CTRL_RESET);
 237
 238         orl(AR9170_PTA_REG_DMA_MODE_CTRL, AR9170_PTA_DMA_MODE_CTRL_DISABLE_USB);
 239
 240         set(AR9170_MAC_REG_POWER_STATE_CTRL,
 241             AR9170_MAC_POWER_STATE_CTRL_RESET);
 242
 243         /* Reset USB FIFO */
 244         set(AR9170_PWR_REG_RESET, AR9170_PWR_RESET_COMMIT_RESET_MASK |
 245                                   AR9170_PWR_RESET_DMA_MASK |
 246                                   AR9170_PWR_RESET_WLAN_MASK);
 247         set(AR9170_PWR_REG_RESET, 0x0);
 248
 249         clock_set(AHB_20_22MHZ, false);
 250
 251         set(AR9170_PWR_REG_PLL_ADDAC, 0x5163);  /* 0x502b; */
 252         set(AR9170_PHY_REG_ADC_SERIAL_CTL, AR9170_PHY_ADC_SCTL_SEL_EXTERNAL_RADIO);
 253         set(0x1c589c, 0);       /* 7-0 */
 254         set(0x1c589c, 0);       /* 15-8 */
 255         set(0x1c589c, 0);       /* 23-16 */
 256         set(0x1c589c, 0);       /* 31- */
 257         set(0x1c589c, 0);       /* 39- */
 258         set(0x1c589c, 0);       /* 47- */
 259         set(0x1c589c, 0);       /* 55- */
 260         set(0x1c589c, 0xf8);    /* 63- */
 261         set(0x1c589c, 0x27);    /* 0x24;        71-     modified */
 262         set(0x1c589c, 0xf9);    /* 79- */
 263         set(0x1c589c, 0x90);    /* 87- */
 264         set(0x1c589c, 0x04);    /* 95- */
 265         set(0x1c589c, 0x48);    /* 103- */
 266         set(0x1c589c, 0x19);    /* 0;           111-    modified */
 267         set(0x1c589c, 0);       /* 119- */
 268         set(0x1c589c, 0);       /* 127- */
 269         set(0x1c589c, 0);       /* 135- */
 270         set(0x1c589c, 0);       /* 143- */
 271         set(0x1c589c, 0);       /* 151- */
 272         set(0x1c589c, 0x70);    /* 159- */
 273         set(0x1c589c, 0x0c);    /* 167- */
 274         set(0x1c589c, 0);       /* 175- */
 275         set(0x1c589c, 0);       /* 183-176 */
 276         set(0x1c589c, 0);       /* 191-184 */
 277         set(0x1c589c, 0);       /* 199- */
 278         set(0x1c589c, 0);       /* 207- */
 279         set(0x1c589c, 0);       /* 215- */
 280         set(0x1c589c, 0);       /* 223- */
 281         set(0x1c589c, 0);       /* 231- */
 282         set(0x1c58c4, 0);       /* 233- 232 */
 283         set(AR9170_PHY_REG_ADC_SERIAL_CTL, AR9170_PHY_ADC_SCTL_SEL_INTERNAL_ADDAC);
 284 }
 285
 286 static void disable_watchdog(void)
 287 {
 288         if (!fw.watchdog_enable)
 289                 return;
 290
 291         /* write watchdog magic pattern for suspend  */
 292         andl(AR9170_PWR_REG_WATCH_DOG_MAGIC, 0xffff);
 293         orl(AR9170_PWR_REG_WATCH_DOG_MAGIC, 0x98760000);
 294
 295         /* Disable watchdog */
 296         set(AR9170_TIMER_REG_WATCH_DOG, 0xffff);
 297 }
 298
 299 void __noreturn reboot(void)
 300 {
 301         disable_watchdog();
 302
 303         /* Turn off power */
 304         turn_power_off();
 305
 306         /* clean bootloader workspace */
 307         memset(&dma_mem, 0, sizeof(dma_mem));
 308
 309         /* add by ygwei for work around USB PHY chirp sequence problem */
 310         set(0x10f100, 0x12345678);
 311
 312         /* Jump to boot code */
 313         jump_to_bootcode();
 314 }
 315
 316 /* service USB events and re-enable USB interrupt */
 317 static void usb_handler(uint8_t usb_interrupt_level1)
 318 {
 319         uint8_t usb_interrupt_level2;
 320
 321         if (usb_interrupt_level1 & BIT(5))
 322                 usb_data_in();
 323
 324         if (usb_interrupt_level1 & BIT(4))
 325                 usb_reg_out();
 326
 327         if (usb_interrupt_level1 & BIT(6))
 328                 usb_status_in();
 329
 330         if (usb_interrupt_level1 & BIT(0)) {
 331                 usb_interrupt_level2 = getb(AR9170_USB_REG_INTR_SOURCE_0);
 332
 333                 if (usb_interrupt_level2 & AR9170_USB_INTR_SRC0_SETUP)
 334                         usb_ep0setup();
 335
 336                 if (usb_interrupt_level2 & AR9170_USB_INTR_SRC0_IN)
 337                         usb_ep0tx();
 338
 339                 if (usb_interrupt_level2 & AR9170_USB_INTR_SRC0_OUT)
 340                         usb_ep0rx();
 341
 342                 if (usb_interrupt_level2 & AR9170_USB_INTR_SRC0_ABORT) {
 343                         /* Clear the command abort interrupt */
 344                         andb(AR9170_USB_REG_INTR_SOURCE_0, (uint8_t)
 345                              ~AR9170_USB_INTR_SRC0_ABORT);
 346                 }
 347
 348                 if (usb_interrupt_level2 & AR9170_USB_INTR_SRC0_FAIL ||
 349                     fw.usb.ep0_action & CARL9170_EP0_STALL) {
 350                         /*
 351                          * transmission failure.
 352                          * stall ep 0
 353                          */
 354                         setb(AR9170_USB_REG_CX_CONFIG_STATUS, BIT(2));
 355                         fw.usb.ep0_action &= ~CARL9170_EP0_STALL;
 356                 }
 357
 358                 if (usb_interrupt_level2 & AR9170_USB_INTR_SRC0_END ||
 359                     fw.usb.ep0_action & CARL9170_EP0_TRIGGER) {
 360                         /*
 361                          * transmission done.
 362                          * set DONE bit.
 363                          */
 364                         setb(AR9170_USB_REG_CX_CONFIG_STATUS, BIT(0));
 365                         fw.usb.ep0_action &= ~CARL9170_EP0_TRIGGER;
 366                 }
 367         }
 368
 369         if (usb_interrupt_level1 & BIT(7)) {
 370                 usb_interrupt_level2 = getb(AR9170_USB_REG_INTR_SOURCE_7);
 371
 372                 if (usb_interrupt_level2 & AR9170_USB_INTR_SRC7_RX0BYTE)
 373                         usb_data_out0Byte();
 374
 375                 if (usb_interrupt_level2 & AR9170_USB_INTR_SRC7_TX0BYTE)
 376                         usb_data_in0Byte();
 377
 378                 if (usb_interrupt_level2 & AR9170_USB_INTR_SRC7_USB_RESET) {
 379                         usb_reset_ack();
 380                         reboot();
 381                 }
 382
 383                 if (usb_interrupt_level2 & AR9170_USB_INTR_SRC7_USB_SUSPEND) {
 384                         usb_suspend_ack();
 385
 386                         fw.suspend_mode = CARL9170_HOST_SUSPENDED;
 387
 388 #ifdef CONFIG_CARL9170FW_WOL
 389                         if (!(fw.usb.device_feature & USB_DEVICE_REMOTE_WAKEUP) ||
 390                             !fw.wol.cmd.flags) {
 391                                 disable_watchdog();
 392
 393                                 /* GO_TO_SUSPEND stops the CPU clock too. */
 394                                 orb(AR9170_USB_REG_MAIN_CTRL, AR9170_USB_MAIN_CTRL_GO_TO_SUSPEND);
 395                         } else {
 396                                 wol_prepare();
 397                         }
 398 #else /* CONFIG_CARL9170FW_WOL */
 399                         disable_watchdog();
 400
 401                         /* GO_TO_SUSPEND stops the CPU clock too. */
 402                         orb(AR9170_USB_REG_MAIN_CTRL, AR9170_USB_MAIN_CTRL_GO_TO_SUSPEND);
 403 #endif /* CONFIG_CARL9170FW_WOL */
 404                 }
 405
 406                 if (usb_interrupt_level2 & AR9170_USB_INTR_SRC7_USB_RESUME) {
 407                         usb_resume_ack();
 408
 409                         fw.suspend_mode = CARL9170_HOST_AWAKE;
 410                         set(AR9170_USB_REG_WAKE_UP, 0);
 411
 412                         reboot();
 413                 }
 414         }
 415 }
 416
 417 void handle_usb(void)
 418 {
 419         uint8_t usb_interrupt_level1;
 420
 421         usb_interrupt_level1 = getb(AR9170_USB_REG_INTR_GROUP);
 422
 423         if (usb_interrupt_level1)
 424                 usb_handler(usb_interrupt_level1);
 425
 426         if (fw.usb.int_pending > 0)
 427                 usb_trigger_in();
 428 }
 429
 430 void usb_timer(void)
 431 {
 432 }