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atl1e_hw.c
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1 /*
2  * Copyright(c) 2007 Atheros Corporation. All rights reserved.
3  *
4  * Derived from Intel e1000 driver
5  * Copyright(c) 1999 - 2005 Intel Corporation. All rights reserved.
6  *
7  * This program is free software; you can redistribute it and/or modify it
8  * under the terms of the GNU General Public License as published by the Free
9  * Software Foundation; either version 2 of the License, or (at your option)
10  * any later version.
11  *
12  * This program is distributed in the hope that it will be useful, but WITHOUT
13  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
14  * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
15  * more details.
16  *
17  * You should have received a copy of the GNU General Public License along with
18  * this program; if not, write to the Free Software Foundation, Inc., 59
19  * Temple Place - Suite 330, Boston, MA 02111-1307, USA.
20  */
21 #include <linux/pci.h>
22 #include <linux/delay.h>
23 #include <linux/mii.h>
24 #include <linux/crc32.h>
25 
26 #include "atl1e.h"
27 
28 /*
29  * check_eeprom_exist
30  * return 0 if eeprom exist
31  */
33 {
34  u32 value;
35 
36  value = AT_READ_REG(hw, REG_SPI_FLASH_CTRL);
37  if (value & SPI_FLASH_CTRL_EN_VPD) {
38  value &= ~SPI_FLASH_CTRL_EN_VPD;
39  AT_WRITE_REG(hw, REG_SPI_FLASH_CTRL, value);
40  }
41  value = AT_READ_REGW(hw, REG_PCIE_CAP_LIST);
42  return ((value & 0xFF00) == 0x6C00) ? 0 : 1;
43 }
44 
46 {
47  u32 value;
48  /*
49  * 00-0B-6A-F6-00-DC
50  * 0: 6AF600DC 1: 000B
51  * low dword
52  */
53  value = (((u32)hw->mac_addr[2]) << 24) |
54  (((u32)hw->mac_addr[3]) << 16) |
55  (((u32)hw->mac_addr[4]) << 8) |
56  (((u32)hw->mac_addr[5])) ;
57  AT_WRITE_REG_ARRAY(hw, REG_MAC_STA_ADDR, 0, value);
58  /* hight dword */
59  value = (((u32)hw->mac_addr[0]) << 8) |
60  (((u32)hw->mac_addr[1])) ;
61  AT_WRITE_REG_ARRAY(hw, REG_MAC_STA_ADDR, 1, value);
62 }
63 
64 /*
65  * atl1e_get_permanent_address
66  * return 0 if get valid mac address,
67  */
68 static int atl1e_get_permanent_address(struct atl1e_hw *hw)
69 {
70  u32 addr[2];
71  u32 i;
72  u32 twsi_ctrl_data;
74 
75  if (is_valid_ether_addr(hw->perm_mac_addr))
76  return 0;
77 
78  /* init */
79  addr[0] = addr[1] = 0;
80 
81  if (!atl1e_check_eeprom_exist(hw)) {
82  /* eeprom exist */
83  twsi_ctrl_data = AT_READ_REG(hw, REG_TWSI_CTRL);
84  twsi_ctrl_data |= TWSI_CTRL_SW_LDSTART;
85  AT_WRITE_REG(hw, REG_TWSI_CTRL, twsi_ctrl_data);
86  for (i = 0; i < AT_TWSI_EEPROM_TIMEOUT; i++) {
87  msleep(10);
88  twsi_ctrl_data = AT_READ_REG(hw, REG_TWSI_CTRL);
89  if ((twsi_ctrl_data & TWSI_CTRL_SW_LDSTART) == 0)
90  break;
91  }
92  if (i >= AT_TWSI_EEPROM_TIMEOUT)
93  return AT_ERR_TIMEOUT;
94  }
95 
96  /* maybe MAC-address is from BIOS */
97  addr[0] = AT_READ_REG(hw, REG_MAC_STA_ADDR);
98  addr[1] = AT_READ_REG(hw, REG_MAC_STA_ADDR + 4);
99  *(u32 *) &eth_addr[2] = swab32(addr[0]);
100  *(u16 *) &eth_addr[0] = swab16(*(u16 *)&addr[1]);
101 
102  if (is_valid_ether_addr(eth_addr)) {
103  memcpy(hw->perm_mac_addr, eth_addr, ETH_ALEN);
104  return 0;
105  }
106 
107  return AT_ERR_EEPROM;
108 }
109 
111 {
112  return true;
113 }
114 
115 bool atl1e_read_eeprom(struct atl1e_hw *hw, u32 offset, u32 *p_value)
116 {
117  int i;
118  u32 control;
119 
120  if (offset & 3)
121  return false; /* address do not align */
122 
123  AT_WRITE_REG(hw, REG_VPD_DATA, 0);
124  control = (offset & VPD_CAP_VPD_ADDR_MASK) << VPD_CAP_VPD_ADDR_SHIFT;
125  AT_WRITE_REG(hw, REG_VPD_CAP, control);
126 
127  for (i = 0; i < 10; i++) {
128  msleep(2);
129  control = AT_READ_REG(hw, REG_VPD_CAP);
130  if (control & VPD_CAP_VPD_FLAG)
131  break;
132  }
133  if (control & VPD_CAP_VPD_FLAG) {
134  *p_value = AT_READ_REG(hw, REG_VPD_DATA);
135  return true;
136  }
137  return false; /* timeout */
138 }
139 
140 void atl1e_force_ps(struct atl1e_hw *hw)
141 {
144 }
145 
146 /*
147  * Reads the adapter's MAC address from the EEPROM
148  *
149  * hw - Struct containing variables accessed by shared code
150  */
152 {
153  int err = 0;
154 
155  err = atl1e_get_permanent_address(hw);
156  if (err)
157  return AT_ERR_EEPROM;
158  memcpy(hw->mac_addr, hw->perm_mac_addr, sizeof(hw->perm_mac_addr));
159  return 0;
160 }
161 
162 /*
163  * atl1e_hash_mc_addr
164  * purpose
165  * set hash value for a multicast address
166  */
167 u32 atl1e_hash_mc_addr(struct atl1e_hw *hw, u8 *mc_addr)
168 {
169  u32 crc32;
170  u32 value = 0;
171  int i;
172 
173  crc32 = ether_crc_le(6, mc_addr);
174  for (i = 0; i < 32; i++)
175  value |= (((crc32 >> i) & 1) << (31 - i));
176 
177  return value;
178 }
179 
180 /*
181  * Sets the bit in the multicast table corresponding to the hash value.
182  * hw - Struct containing variables accessed by shared code
183  * hash_value - Multicast address hash value
184  */
185 void atl1e_hash_set(struct atl1e_hw *hw, u32 hash_value)
186 {
187  u32 hash_bit, hash_reg;
188  u32 mta;
189 
190  /*
191  * The HASH Table is a register array of 2 32-bit registers.
192  * It is treated like an array of 64 bits. We want to set
193  * bit BitArray[hash_value]. So we figure out what register
194  * the bit is in, read it, OR in the new bit, then write
195  * back the new value. The register is determined by the
196  * upper 7 bits of the hash value and the bit within that
197  * register are determined by the lower 5 bits of the value.
198  */
199  hash_reg = (hash_value >> 31) & 0x1;
200  hash_bit = (hash_value >> 26) & 0x1F;
201 
202  mta = AT_READ_REG_ARRAY(hw, REG_RX_HASH_TABLE, hash_reg);
203 
204  mta |= (1 << hash_bit);
205 
206  AT_WRITE_REG_ARRAY(hw, REG_RX_HASH_TABLE, hash_reg, mta);
207 }
208 /*
209  * Reads the value from a PHY register
210  * hw - Struct containing variables accessed by shared code
211  * reg_addr - address of the PHY register to read
212  */
213 int atl1e_read_phy_reg(struct atl1e_hw *hw, u16 reg_addr, u16 *phy_data)
214 {
215  u32 val;
216  int i;
217 
218  val = ((u32)(reg_addr & MDIO_REG_ADDR_MASK)) << MDIO_REG_ADDR_SHIFT |
221 
222  AT_WRITE_REG(hw, REG_MDIO_CTRL, val);
223 
224  wmb();
225 
226  for (i = 0; i < MDIO_WAIT_TIMES; i++) {
227  udelay(2);
228  val = AT_READ_REG(hw, REG_MDIO_CTRL);
229  if (!(val & (MDIO_START | MDIO_BUSY)))
230  break;
231  wmb();
232  }
233  if (!(val & (MDIO_START | MDIO_BUSY))) {
234  *phy_data = (u16)val;
235  return 0;
236  }
237 
238  return AT_ERR_PHY;
239 }
240 
241 /*
242  * Writes a value to a PHY register
243  * hw - Struct containing variables accessed by shared code
244  * reg_addr - address of the PHY register to write
245  * data - data to write to the PHY
246  */
247 int atl1e_write_phy_reg(struct atl1e_hw *hw, u32 reg_addr, u16 phy_data)
248 {
249  int i;
250  u32 val;
251 
252  val = ((u32)(phy_data & MDIO_DATA_MASK)) << MDIO_DATA_SHIFT |
255  MDIO_START |
257 
258  AT_WRITE_REG(hw, REG_MDIO_CTRL, val);
259  wmb();
260 
261  for (i = 0; i < MDIO_WAIT_TIMES; i++) {
262  udelay(2);
263  val = AT_READ_REG(hw, REG_MDIO_CTRL);
264  if (!(val & (MDIO_START | MDIO_BUSY)))
265  break;
266  wmb();
267  }
268 
269  if (!(val & (MDIO_START | MDIO_BUSY)))
270  return 0;
271 
272  return AT_ERR_PHY;
273 }
274 
275 /*
276  * atl1e_init_pcie - init PCIE module
277  */
278 static void atl1e_init_pcie(struct atl1e_hw *hw)
279 {
280  u32 value;
281  /* comment 2lines below to save more power when sususpend
282  value = LTSSM_TEST_MODE_DEF;
283  AT_WRITE_REG(hw, REG_LTSSM_TEST_MODE, value);
284  */
285 
286  /* pcie flow control mode change */
287  value = AT_READ_REG(hw, 0x1008);
288  value |= 0x8000;
289  AT_WRITE_REG(hw, 0x1008, value);
290 }
291 /*
292  * Configures PHY autoneg and flow control advertisement settings
293  *
294  * hw - Struct containing variables accessed by shared code
295  */
296 static int atl1e_phy_setup_autoneg_adv(struct atl1e_hw *hw)
297 {
298  s32 ret_val;
299  u16 mii_autoneg_adv_reg;
300  u16 mii_1000t_ctrl_reg;
301 
302  if (0 != hw->mii_autoneg_adv_reg)
303  return 0;
304  /* Read the MII Auto-Neg Advertisement Register (Address 4/9). */
305  mii_autoneg_adv_reg = MII_AR_DEFAULT_CAP_MASK;
306  mii_1000t_ctrl_reg = MII_AT001_CR_1000T_DEFAULT_CAP_MASK;
307 
308  /*
309  * Need to parse autoneg_advertised and set up
310  * the appropriate PHY registers. First we will parse for
311  * autoneg_advertised software override. Since we can advertise
312  * a plethora of combinations, we need to check each bit
313  * individually.
314  */
315 
316  /*
317  * First we clear all the 10/100 mb speed bits in the Auto-Neg
318  * Advertisement Register (Address 4) and the 1000 mb speed bits in
319  * the 1000Base-T control Register (Address 9).
320  */
321  mii_autoneg_adv_reg &= ~ADVERTISE_ALL;
322  mii_1000t_ctrl_reg &= ~MII_AT001_CR_1000T_SPEED_MASK;
323 
324  /*
325  * Need to parse MediaType and setup the
326  * appropriate PHY registers.
327  */
328  switch (hw->media_type) {
330  mii_autoneg_adv_reg |= ADVERTISE_ALL;
332  if (hw->nic_type == athr_l1e) {
333  mii_1000t_ctrl_reg |= ADVERTISE_1000FULL;
335  }
336  break;
337 
339  mii_autoneg_adv_reg |= ADVERTISE_100FULL;
341  break;
342 
344  mii_autoneg_adv_reg |= ADVERTISE_100_HALF;
346  break;
347 
348  case MEDIA_TYPE_10M_FULL:
349  mii_autoneg_adv_reg |= ADVERTISE_10_FULL;
351  break;
352 
353  default:
354  mii_autoneg_adv_reg |= ADVERTISE_10_HALF;
356  break;
357  }
358 
359  /* flow control fixed to enable all */
360  mii_autoneg_adv_reg |= (ADVERTISE_PAUSE_ASYM | ADVERTISE_PAUSE_CAP);
361 
362  hw->mii_autoneg_adv_reg = mii_autoneg_adv_reg;
363  hw->mii_1000t_ctrl_reg = mii_1000t_ctrl_reg;
364 
365  ret_val = atl1e_write_phy_reg(hw, MII_ADVERTISE, mii_autoneg_adv_reg);
366  if (ret_val)
367  return ret_val;
368 
369  if (hw->nic_type == athr_l1e || hw->nic_type == athr_l2e_revA) {
370  ret_val = atl1e_write_phy_reg(hw, MII_CTRL1000,
371  mii_1000t_ctrl_reg);
372  if (ret_val)
373  return ret_val;
374  }
375 
376  return 0;
377 }
378 
379 
380 /*
381  * Resets the PHY and make all config validate
382  *
383  * hw - Struct containing variables accessed by shared code
384  *
385  * Sets bit 15 and 12 of the MII control regiser (for F001 bug)
386  */
387 int atl1e_phy_commit(struct atl1e_hw *hw)
388 {
389  struct atl1e_adapter *adapter = hw->adapter;
390  int ret_val;
391  u16 phy_data;
392 
393  phy_data = BMCR_RESET | BMCR_ANENABLE | BMCR_ANRESTART;
394 
395  ret_val = atl1e_write_phy_reg(hw, MII_BMCR, phy_data);
396  if (ret_val) {
397  u32 val;
398  int i;
399  /**************************************
400  * pcie serdes link may be down !
401  **************************************/
402  for (i = 0; i < 25; i++) {
403  msleep(1);
404  val = AT_READ_REG(hw, REG_MDIO_CTRL);
405  if (!(val & (MDIO_START | MDIO_BUSY)))
406  break;
407  }
408 
409  if (0 != (val & (MDIO_START | MDIO_BUSY))) {
410  netdev_err(adapter->netdev,
411  "pcie linkdown at least for 25ms\n");
412  return ret_val;
413  }
414 
415  netdev_err(adapter->netdev, "pcie linkup after %d ms\n", i);
416  }
417  return 0;
418 }
419 
420 int atl1e_phy_init(struct atl1e_hw *hw)
421 {
422  struct atl1e_adapter *adapter = hw->adapter;
423  s32 ret_val;
424  u16 phy_val;
425 
426  if (hw->phy_configured) {
427  if (hw->re_autoneg) {
428  hw->re_autoneg = false;
429  return atl1e_restart_autoneg(hw);
430  }
431  return 0;
432  }
433 
434  /* RESET GPHY Core */
436  msleep(2);
439  msleep(2);
440 
441  /* patches */
442  /* p1. eable hibernation mode */
443  ret_val = atl1e_write_phy_reg(hw, MII_DBG_ADDR, 0xB);
444  if (ret_val)
445  return ret_val;
446  ret_val = atl1e_write_phy_reg(hw, MII_DBG_DATA, 0xBC00);
447  if (ret_val)
448  return ret_val;
449  /* p2. set Class A/B for all modes */
450  ret_val = atl1e_write_phy_reg(hw, MII_DBG_ADDR, 0);
451  if (ret_val)
452  return ret_val;
453  phy_val = 0x02ef;
454  /* remove Class AB */
455  /* phy_val = hw->emi_ca ? 0x02ef : 0x02df; */
456  ret_val = atl1e_write_phy_reg(hw, MII_DBG_DATA, phy_val);
457  if (ret_val)
458  return ret_val;
459  /* p3. 10B ??? */
460  ret_val = atl1e_write_phy_reg(hw, MII_DBG_ADDR, 0x12);
461  if (ret_val)
462  return ret_val;
463  ret_val = atl1e_write_phy_reg(hw, MII_DBG_DATA, 0x4C04);
464  if (ret_val)
465  return ret_val;
466  /* p4. 1000T power */
467  ret_val = atl1e_write_phy_reg(hw, MII_DBG_ADDR, 0x4);
468  if (ret_val)
469  return ret_val;
470  ret_val = atl1e_write_phy_reg(hw, MII_DBG_DATA, 0x8BBB);
471  if (ret_val)
472  return ret_val;
473 
474  ret_val = atl1e_write_phy_reg(hw, MII_DBG_ADDR, 0x5);
475  if (ret_val)
476  return ret_val;
477  ret_val = atl1e_write_phy_reg(hw, MII_DBG_DATA, 0x2C46);
478  if (ret_val)
479  return ret_val;
480 
481  msleep(1);
482 
483  /*Enable PHY LinkChange Interrupt */
484  ret_val = atl1e_write_phy_reg(hw, MII_INT_CTRL, 0xC00);
485  if (ret_val) {
486  netdev_err(adapter->netdev,
487  "Error enable PHY linkChange Interrupt\n");
488  return ret_val;
489  }
490  /* setup AutoNeg parameters */
491  ret_val = atl1e_phy_setup_autoneg_adv(hw);
492  if (ret_val) {
493  netdev_err(adapter->netdev,
494  "Error Setting up Auto-Negotiation\n");
495  return ret_val;
496  }
497  /* SW.Reset & En-Auto-Neg to restart Auto-Neg*/
498  netdev_dbg(adapter->netdev, "Restarting Auto-Negotiation\n");
499  ret_val = atl1e_phy_commit(hw);
500  if (ret_val) {
501  netdev_err(adapter->netdev, "Error resetting the phy\n");
502  return ret_val;
503  }
504 
505  hw->phy_configured = true;
506 
507  return 0;
508 }
509 
510 /*
511  * Reset the transmit and receive units; mask and clear all interrupts.
512  * hw - Struct containing variables accessed by shared code
513  * return : 0 or idle status (if error)
514  */
515 int atl1e_reset_hw(struct atl1e_hw *hw)
516 {
517  struct atl1e_adapter *adapter = hw->adapter;
518  struct pci_dev *pdev = adapter->pdev;
519 
520  u32 idle_status_data = 0;
521  u16 pci_cfg_cmd_word = 0;
522  int timeout = 0;
523 
524  /* Workaround for PCI problem when BIOS sets MMRBC incorrectly. */
525  pci_read_config_word(pdev, PCI_REG_COMMAND, &pci_cfg_cmd_word);
526  if ((pci_cfg_cmd_word & (CMD_IO_SPACE |
529  pci_cfg_cmd_word |= (CMD_IO_SPACE |
531  pci_write_config_word(pdev, PCI_REG_COMMAND, pci_cfg_cmd_word);
532  }
533 
534  /*
535  * Issue Soft Reset to the MAC. This will reset the chip's
536  * transmit, receive, DMA. It will not effect
537  * the current PCI configuration. The global reset bit is self-
538  * clearing, and should clear within a microsecond.
539  */
542  wmb();
543  msleep(1);
544 
545  /* Wait at least 10ms for All module to be Idle */
546  for (timeout = 0; timeout < AT_HW_MAX_IDLE_DELAY; timeout++) {
547  idle_status_data = AT_READ_REG(hw, REG_IDLE_STATUS);
548  if (idle_status_data == 0)
549  break;
550  msleep(1);
551  cpu_relax();
552  }
553 
554  if (timeout >= AT_HW_MAX_IDLE_DELAY) {
555  netdev_err(adapter->netdev,
556  "MAC state machine can't be idle since disabled for 10ms second\n");
557  return AT_ERR_TIMEOUT;
558  }
559 
560  return 0;
561 }
562 
563 
564 /*
565  * Performs basic configuration of the adapter.
566  *
567  * hw - Struct containing variables accessed by shared code
568  * Assumes that the controller has previously been reset and is in a
569  * post-reset uninitialized state. Initializes multicast table,
570  * and Calls routines to setup link
571  * Leaves the transmit and receive units disabled and uninitialized.
572  */
573 int atl1e_init_hw(struct atl1e_hw *hw)
574 {
575  s32 ret_val = 0;
576 
577  atl1e_init_pcie(hw);
578 
579  /* Zero out the Multicast HASH table */
580  /* clear the old settings from the multicast hash table */
583 
584  ret_val = atl1e_phy_init(hw);
585 
586  return ret_val;
587 }
588 
589 /*
590  * Detects the current speed and duplex settings of the hardware.
591  *
592  * hw - Struct containing variables accessed by shared code
593  * speed - Speed of the connection
594  * duplex - Duplex setting of the connection
595  */
597 {
598  int err;
599  u16 phy_data;
600 
601  /* Read PHY Specific Status Register (17) */
602  err = atl1e_read_phy_reg(hw, MII_AT001_PSSR, &phy_data);
603  if (err)
604  return err;
605 
606  if (!(phy_data & MII_AT001_PSSR_SPD_DPLX_RESOLVED))
607  return AT_ERR_PHY_RES;
608 
609  switch (phy_data & MII_AT001_PSSR_SPEED) {
611  *speed = SPEED_1000;
612  break;
614  *speed = SPEED_100;
615  break;
617  *speed = SPEED_10;
618  break;
619  default:
620  return AT_ERR_PHY_SPEED;
621  break;
622  }
623 
624  if (phy_data & MII_AT001_PSSR_DPLX)
625  *duplex = FULL_DUPLEX;
626  else
627  *duplex = HALF_DUPLEX;
628 
629  return 0;
630 }
631 
633 {
634  int err = 0;
635 
637  if (err)
638  return err;
639 
640  if (hw->nic_type == athr_l1e || hw->nic_type == athr_l2e_revA) {
642  hw->mii_1000t_ctrl_reg);
643  if (err)
644  return err;
645  }
646 
647  err = atl1e_write_phy_reg(hw, MII_BMCR,
649  return err;
650 }
651