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    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 "hostif.h"
  27 #include "printf.h"
  28 #include "timer.h"
  29 #include "rom.h"
  30 #include "gpio.h"
  31 #include "shared/phy.h"
  32
  33 #ifdef CONFIG_CARL9170FW_DEBUG_USB
  34 void usb_putc(const char c)
  35 {
  36         fw.usb.put_buffer[fw.usb.put_index++] = (uint8_t) c;
  37
  38         if (fw.usb.put_index == CARL9170_MAX_CMD_PAYLOAD_LEN || c == '\0') {
  39                 fw.usb.put_buffer[fw.usb.put_index] = 0;
  40
  41                 send_cmd_to_host(__roundup(fw.usb.put_index, 4),
  42                                  CARL9170_RSP_TEXT, fw.usb.put_index,
  43                                  fw.usb.put_buffer);
  44                 fw.usb.put_index = 0;
  45         }
  46 }
  47
  48 void usb_print_hex_dump(const void *buf, int len)
  49 {
  50         unsigned int offset = 0, block = 0;
  51         while (len > 0) {
  52                 block = min(__roundup(len, 4), CARL9170_MAX_CMD_PAYLOAD_LEN);
  53
  54                 send_cmd_to_host(block, CARL9170_RSP_HEXDUMP, len,
  55                                  (const uint8_t *) buf + offset);
  56
  57                 offset += block;
  58                 len -= block;
  59         }
  60 }
  61 #endif /* CONFIG_CARL9170FW_DEBUG_USB */
  62
  63 /* grab a buffer from the interrupt in queue ring-buffer */
  64 static struct carl9170_rsp *get_int_buf(void)
  65 {
  66         struct carl9170_rsp *tmp;
  67
  68         /* fetch the _oldest_ buffer from the ring */
  69         tmp = &fw.usb.int_buf[fw.usb.int_tail_index];
  70
  71         /* assign a unique sequence for every response/trap */
  72         tmp->hdr.seq = fw.usb.int_tail_index;
  73
  74         fw.usb.int_tail_index++;
  75
  76         fw.usb.int_tail_index %= CARL9170_INT_RQ_CACHES;
  77         if (fw.usb.int_pending != CARL9170_INT_RQ_CACHES)
  78                 fw.usb.int_pending++;
  79
  80         return tmp;
  81 }
  82
  83 /* Pop up data from Interrupt IN Queue to USB Response buffer */
  84 static struct carl9170_rsp *dequeue_int_buf(unsigned int space)
  85 {
  86         struct carl9170_rsp *tmp = NULL;
  87
  88         if (fw.usb.int_pending > 0) {
  89                 tmp = &fw.usb.int_buf[fw.usb.int_head_index];
  90
  91                 if ((unsigned int)(tmp->hdr.len + 8) > space)
  92                         return NULL;
  93
  94                 fw.usb.int_head_index++;
  95                 fw.usb.int_head_index %= CARL9170_INT_RQ_CACHES;
  96                 fw.usb.int_pending--;
  97         }
  98
  99         return tmp;
 100 }
 101
 102 static void usb_data_in(void)
 103 {
 104 }
 105
 106 static void usb_reg_out(void)
 107 {
 108         uint32_t *regaddr = (uint32_t *) &dma_mem.reserved.cmd;
 109         uint16_t usbfifolen, i;
 110
 111         usb_reset_out();
 112
 113         usbfifolen = getb(AR9170_USB_REG_EP4_BYTE_COUNT_LOW) |
 114                      getb(AR9170_USB_REG_EP4_BYTE_COUNT_HIGH) << 8;
 115
 116         if (usbfifolen & 0x3)
 117                 usbfifolen = (usbfifolen >> 2) + 1;
 118         else
 119                 usbfifolen = usbfifolen >> 2;
 120
 121         for (i = 0; i < usbfifolen; i++)
 122                 *regaddr++ = get(AR9170_USB_REG_EP4_DATA);
 123
 124         handle_cmd(get_int_buf());
 125
 126         usb_trigger_in();
 127 }
 128
 129 static void usb_status_in(void)
 130 {
 131         struct carl9170_rsp *rsp;
 132         unsigned int rem, tlen, elen;
 133
 134         if (!fw.usb.int_desc_available)
 135                 return ;
 136
 137         fw.usb.int_desc_available = 0;
 138
 139         rem = AR9170_BLOCK_SIZE - AR9170_INT_MAGIC_HEADER_SIZE;
 140         tlen = AR9170_INT_MAGIC_HEADER_SIZE;
 141
 142         usb_reset_in();
 143
 144         while (fw.usb.int_pending) {
 145                 rsp = dequeue_int_buf(rem);
 146                 if (!rsp)
 147                         break;
 148
 149                 elen = rsp->hdr.len + 4;
 150
 151                 memcpy(DESC_PAYLOAD_OFF(fw.usb.int_desc, tlen), rsp, elen);
 152
 153                 rem -= elen;
 154                 tlen += elen;
 155         }
 156
 157         if (tlen == AR9170_INT_MAGIC_HEADER_SIZE) {
 158                 DBG("attempted to send an empty int response!\n");
 159                 goto reclaim;
 160         }
 161
 162         fw.usb.int_desc->ctrl = AR9170_CTRL_FS_BIT | AR9170_CTRL_LS_BIT;
 163         fw.usb.int_desc->totalLen = tlen;
 164         fw.usb.int_desc->dataSize = tlen;
 165
 166         /* Put to UpQ */
 167         dma_put(&fw.pta.up_queue, fw.usb.int_desc);
 168
 169         /* Trigger PTA UP DMA */
 170         set(AR9170_PTA_REG_UP_DMA_TRIGGER, 1);
 171         usb_trigger_out();
 172
 173         return ;
 174
 175 reclaim:
 176         /* TODO: not sure what to do here */
 177         fw.usb.int_desc_available = 1;
 178 }
 179
 180 void send_cmd_to_host(const uint8_t len, const uint8_t type,
 181                       const uint8_t ext, const uint8_t *body)
 182 {
 183         struct carl9170_cmd *resp;
 184
 185 #ifdef CONFIG_CARL9170FW_DEBUG
 186         if (unlikely(len > sizeof(resp->data))) {
 187                 DBG("CMD too long:%x %d\n", type, len);
 188                 return ;
 189         }
 190
 191         /* Element length must be a multiple of 4. */
 192         if (unlikely(len & 0x3)) {
 193                 DBG("CMD length not mult. of 4:%x %d\n", type, len);
 194                 return ;
 195         }
 196 #endif /* CONFIG_CARL9170FW_DEBUG */
 197
 198         resp = (struct carl9170_cmd *) get_int_buf();
 199         if (unlikely(resp == NULL)) {
 200                 /* not very helpful for NON UART users */
 201                 DBG("out of msg buffers\n");
 202                 return ;
 203         }
 204
 205         resp->hdr.len = len;
 206         resp->hdr.cmd = type;
 207         resp->hdr.ext = ext;
 208
 209         memcpy(resp->data, body, len);
 210         usb_trigger_in();
 211 }
 212
 213 /* Reset all the USB FIFO used for WLAN */
 214 static void usb_reset_FIFO(void)
 215 {
 216         uint32_t val;
 217
 218         /*
 219          * of course,
 220          * simpley ORing AR9170_MAC_POWER_STATE_CTRL_RESET
 221          * would be... I dunno, maybe: just to simple?
 222          */
 223
 224         val = get(AR9170_MAC_REG_POWER_STATE_CTRL);
 225         val |= AR9170_MAC_POWER_STATE_CTRL_RESET;
 226         set(AR9170_MAC_REG_POWER_STATE_CTRL, val);
 227
 228         /* Reset USB FIFO */
 229         set(AR9170_PWR_REG_ADDA_BB, AR9170_PWR_ADDA_BB_USB_FIFO_RESET);
 230         set(AR9170_PWR_REG_ADDA_BB, 0x0);
 231 }
 232
 233 /* Turn off ADDA/RF power, PLL */
 234 static void turn_power_off(void)
 235 {
 236         set(AR9170_PHY_REG_ACTIVE, AR9170_PHY_ACTIVE_DIS);
 237         set(AR9170_PHY_REG_ADC_CTL, 0xa0000000 |
 238             AR9170_PHY_ADC_CTL_OFF_PWDADC | AR9170_PHY_ADC_CTL_OFF_PWDDAC);
 239
 240         set(AR9170_GPIO_REG_PORT_DATA, 0);
 241         set(AR9170_GPIO_REG_PORT_TYPE, 0xf);
 242
 243         set(AR9170_PWR_REG_BASE, 0x40021);
 244         set(AR9170_PWR_REG_ADDA_BB, 0);
 245
 246         clock_set(false, AHB_20_22MHZ);
 247
 248         set(AR9170_PWR_REG_PLL_ADDAC, 0x5163);  /* 0x502b; */
 249         set(AR9170_PHY_REG_ADC_SERIAL_CTL, AR9170_PHY_ADC_SCTL_SEL_EXTERNAL_RADIO);
 250         set(0x1c589c, 0);       /* 7-0 */
 251         set(0x1c589c, 0);       /* 15-8 */
 252         set(0x1c589c, 0);       /* 23-16 */
 253         set(0x1c589c, 0);       /* 31- */
 254         set(0x1c589c, 0);       /* 39- */
 255         set(0x1c589c, 0);       /* 47- */
 256         set(0x1c589c, 0);       /* 55- */
 257         set(0x1c589c, 0xf8);    /* 63- */
 258         set(0x1c589c, 0x27);    /* 0x24;        71-     modified */
 259         set(0x1c589c, 0xf9);    /* 79- */
 260         set(0x1c589c, 0x90);    /* 87- */
 261         set(0x1c589c, 0x04);    /* 95- */
 262         set(0x1c589c, 0x48);    /* 103- */
 263         set(0x1c589c, 0x19);    /* 0;           111-    modified */
 264         set(0x1c589c, 0);       /* 119- */
 265         set(0x1c589c, 0);       /* 127- */
 266         set(0x1c589c, 0);       /* 135- */
 267         set(0x1c589c, 0);       /* 143- */
 268         set(0x1c589c, 0);       /* 151- */
 269         set(0x1c589c, 0x70);    /* 159- */
 270         set(0x1c589c, 0x0c);    /* 167- */
 271         set(0x1c589c, 0);       /* 175- */
 272         set(0x1c589c, 0);       /* 183-176 */
 273         set(0x1c589c, 0);       /* 191-184 */
 274         set(0x1c589c, 0);       /* 199- */
 275         set(0x1c589c, 0);       /* 207- */
 276         set(0x1c589c, 0);       /* 215- */
 277         set(0x1c589c, 0);       /* 223- */
 278         set(0x1c589c, 0);       /* 231- */
 279         set(0x1c58c4, 0);       /* 233- 232 */
 280         set(AR9170_PHY_REG_ADC_SERIAL_CTL, AR9170_PHY_ADC_SCTL_SEL_INTERNAL_ADDAC);
 281 }
 282
 283 void __attribute__((noreturn)) reboot(void)
 284 {
 285         /* turn off leds */
 286         led_set(0);
 287
 288         /* write watchdog magic pattern for suspend  */
 289         andl(AR9170_PWR_REG_WATCH_DOG_MAGIC, 0xffff);
 290         orl(AR9170_PWR_REG_WATCH_DOG_MAGIC, 0x98760000);
 291
 292         /* Disable watchdog */
 293         orl(AR9170_TIMER_REG_WATCH_DOG, 0xffff);
 294
 295         /* Reset USB FIFO */
 296         usb_reset_FIFO();
 297
 298         /* Turn off power */
 299         turn_power_off();
 300
 301         /* add by ygwei for work around USB PHY chirp sequence problem */
 302         set(0x10f100, 0x12345678);
 303
 304         /* Jump to boot code */
 305         jump_to_bootcode();
 306 }
 307
 308 /* service USB events and re-enable USB interrupt */
 309 static void usb_handler(uint8_t usb_interrupt_level1)
 310 {
 311         uint8_t usb_interrupt_level2;
 312
 313         if (usb_interrupt_level1 & BIT(5))
 314                 usb_data_in();
 315
 316         if (usb_interrupt_level1 & BIT(4))
 317                 usb_reg_out();
 318
 319         if (usb_interrupt_level1 & BIT(6))
 320                 usb_status_in();
 321
 322         if (usb_interrupt_level1 & BIT(0)) {
 323                 usb_interrupt_level2 = getb(AR9170_USB_REG_INTR_SOURCE_0);
 324
 325                 if (usb_interrupt_level2 & BIT(0))
 326                         usb_ep0setup();
 327
 328                 if (usb_interrupt_level2 & BIT(1))
 329                         usb_ep0tx();
 330
 331                 if (usb_interrupt_level2 & BIT(2))
 332                         usb_ep0rx();
 333
 334                 if (usb_interrupt_level2 & BIT(7)) {
 335                         /* Clear the command abort interrupt */
 336                         andb(AR9170_USB_REG_INTR_SOURCE_0, 0x7f);
 337                 }
 338
 339                 if (usb_interrupt_level2 & BIT(3) ||
 340                     fw.usb.ep0_action & CARL9170_EP0_STALL) {
 341                         /*
 342                          * transmission failure.
 343                          * stall ep 0
 344                          */
 345                         setb(AR9170_USB_REG_CX_CONFIG_STATUS, BIT(2));
 346                         fw.usb.ep0_action &= ~CARL9170_EP0_STALL;
 347                 }
 348
 349                 if (usb_interrupt_level2 & BIT(4) ||
 350                     fw.usb.ep0_action & CARL9170_EP0_TRIGGER) {
 351                         /*
 352                          * transmission done.
 353                          * set DONE bit.
 354                          */
 355                         setb(AR9170_USB_REG_CX_CONFIG_STATUS, BIT(0));
 356                         fw.usb.ep0_action &= ~CARL9170_EP0_TRIGGER;
 357                 }
 358         }
 359
 360         if (usb_interrupt_level1 & BIT(7)) {
 361                 usb_interrupt_level2 = getb(AR9170_USB_REG_INTR_SOURCE_7);
 362
 363                 if (usb_interrupt_level2 & BIT(7))
 364                         usb_data_out0Byte();
 365
 366                 if (usb_interrupt_level2 & BIT(6))
 367                         usb_data_in0Byte();
 368
 369                 if (usb_interrupt_level2 & BIT(1)) {
 370                         usb_reset_ack();
 371                         reboot();
 372                 }
 373
 374                 if (usb_interrupt_level2 & BIT(2)) {
 375                         /* ACK USB suspend interrupt */
 376                         usb_suspend_ack();
 377
 378                         /* Set GO_TO_SUSPEND bit to USB main control register */
 379                         setb(AR9170_USB_REG_MAIN_CTRL, BIT(3));
 380
 381                         /* add by ygwei for work around USB PHY chirp sequence problem */
 382                         set(0x10f100, 0x12345678);
 383
 384                         reboot();
 385                 }
 386
 387                 if (usb_interrupt_level2 & BIT(3))
 388                         usb_resume_ack();
 389         }
 390 }
 391
 392 void handle_usb(void)
 393 {
 394         uint8_t usb_interrupt_level1;
 395
 396         usb_interrupt_level1 = getb(AR9170_USB_REG_INTR_GROUP);
 397
 398         if (usb_interrupt_level1)
 399                 usb_handler(usb_interrupt_level1);
 400
 401         if (fw.usb.int_pending > 0)
 402                 usb_trigger_in();
 403 }
 404
 405 #ifdef CONFIG_CARL9170FW_USB_WATCHDOG
 406 void usb_watchdog_timer(void)
 407 {
 408         if (fw.usb.watchdog.state == cpu_to_le32(CARL9170_USB_WATCHDOG_INACTIVE))
 409                 return;
 410
 411         fw.usb.watchdog.state++;
 412
 413         if (le32_to_cpu(fw.usb.watchdog.state) >= CARL9170_USB_WATCHDOG_TRIGGER_THRESHOLD) {
 414                 for (;;) {
 415                         /*
 416                          * Simply wait until the HW watchdog
 417                          * timer has elapsed.
 418                          */
 419                 }
 420         }
 421
 422         send_cmd_to_host(sizeof(fw.usb.watchdog), CARL9170_RSP_USB_WD,
 423                          0x80, (uint8_t *) &fw.usb.watchdog);
 424 }
 425 #endif /* CONFIG_CARL9170FW_USB_WATCHDOG */
 426