drivers/net/sfc/boards.c

   1 /****************************************************************************
   2  * Driver for Solarflare Solarstorm network controllers and boards
   3  * Copyright 2007 Solarflare Communications Inc.
   4  *
   5  * This program is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 as published
   7  * by the Free Software Foundation, incorporated herein by reference.
   8  */
   9
  10 #include "net_driver.h"
  11 #include "phy.h"
  12 #include "boards.h"
  13 #include "efx.h"
  14 #include "workarounds.h"
  15
  16 /* Macros for unpacking the board revision */
  17 /* The revision info is in host byte order. */
  18 #define BOARD_TYPE(_rev) (_rev >> 8)
  19 #define BOARD_MAJOR(_rev) ((_rev >> 4) & 0xf)
  20 #define BOARD_MINOR(_rev) (_rev & 0xf)
  21
  22 /* Blink support. If the PHY has no auto-blink mode so we hang it off a timer */
  23 #define BLINK_INTERVAL (HZ/2)
  24
  25 static void blink_led_timer(unsigned long context)
  26 {
  27         struct efx_nic *efx = (struct efx_nic *)context;
  28         struct efx_blinker *bl = &efx->board_info.blinker;
  29         efx->board_info.set_fault_led(efx, bl->state);
  30         bl->state = !bl->state;
  31         if (bl->resubmit)
  32                 mod_timer(&bl->timer, jiffies + BLINK_INTERVAL);
  33 }
  34
  35 static void board_blink(struct efx_nic *efx, bool blink)
  36 {
  37         struct efx_blinker *blinker = &efx->board_info.blinker;
  38
  39         /* The rtnl mutex serialises all ethtool ioctls, so
  40          * nothing special needs doing here. */
  41         if (blink) {
  42                 blinker->resubmit = true;
  43                 blinker->state = false;
  44                 setup_timer(&blinker->timer, blink_led_timer,
  45                             (unsigned long)efx);
  46                 mod_timer(&blinker->timer, jiffies + BLINK_INTERVAL);
  47         } else {
  48                 blinker->resubmit = false;
  49                 if (blinker->timer.function)
  50                         del_timer_sync(&blinker->timer);
  51                 efx->board_info.set_fault_led(efx, false);
  52         }
  53 }
  54
  55 /*****************************************************************************
  56  * Support for LM87 sensor chip used on several boards
  57  */
  58 #define LM87_REG_ALARMS1                0x41
  59 #define LM87_REG_ALARMS2                0x42
  60 #define LM87_IN_LIMITS(nr, _min, _max)                  \
  61         0x2B + (nr) * 2, _max, 0x2C + (nr) * 2, _min
  62 #define LM87_AIN_LIMITS(nr, _min, _max)                 \
  63         0x3B + (nr), _max, 0x1A + (nr), _min
  64 #define LM87_TEMP_INT_LIMITS(_min, _max)                \
  65         0x39, _max, 0x3A, _min
  66 #define LM87_TEMP_EXT1_LIMITS(_min, _max)               \
  67         0x37, _max, 0x38, _min
  68
  69 #define LM87_ALARM_TEMP_INT             0x10
  70 #define LM87_ALARM_TEMP_EXT1            0x20
  71
  72 #if defined(CONFIG_SENSORS_LM87) || defined(CONFIG_SENSORS_LM87_MODULE)
  73
  74 static int efx_init_lm87(struct efx_nic *efx, struct i2c_board_info *info,
  75                          const u8 *reg_values)
  76 {
  77         struct i2c_client *client = i2c_new_device(&efx->i2c_adap, info);
  78         int rc;
  79
  80         if (!client)
  81                 return -EIO;
  82
  83         while (*reg_values) {
  84                 u8 reg = *reg_values++;
  85                 u8 value = *reg_values++;
  86                 rc = i2c_smbus_write_byte_data(client, reg, value);
  87                 if (rc)
  88                         goto err;
  89         }
  90
  91         efx->board_info.hwmon_client = client;
  92         return 0;
  93
  94 err:
  95         i2c_unregister_device(client);
  96         return rc;
  97 }
  98
  99 static void efx_fini_lm87(struct efx_nic *efx)
 100 {
 101         i2c_unregister_device(efx->board_info.hwmon_client);
 102 }
 103
 104 static int efx_check_lm87(struct efx_nic *efx, unsigned mask)
 105 {
 106         struct i2c_client *client = efx->board_info.hwmon_client;
 107         s32 alarms1, alarms2;
 108
 109         /* If link is up then do not monitor temperature */
 110         if (EFX_WORKAROUND_7884(efx) && efx->link_up)
 111                 return 0;
 112
 113         alarms1 = i2c_smbus_read_byte_data(client, LM87_REG_ALARMS1);
 114         alarms2 = i2c_smbus_read_byte_data(client, LM87_REG_ALARMS2);
 115         if (alarms1 < 0)
 116                 return alarms1;
 117         if (alarms2 < 0)
 118                 return alarms2;
 119         alarms1 &= mask;
 120         alarms2 &= mask >> 8;
 121         if (alarms1 || alarms2) {
 122                 EFX_ERR(efx,
 123                         "LM87 detected a hardware failure (status %02x:%02x)"
 124                         "%s%s\n",
 125                         alarms1, alarms2,
 126                         (alarms1 & LM87_ALARM_TEMP_INT) ? " INTERNAL" : "",
 127                         (alarms1 & LM87_ALARM_TEMP_EXT1) ? " EXTERNAL" : "");
 128                 return -ERANGE;
 129         }
 130
 131         return 0;
 132 }
 133
 134 #else /* !CONFIG_SENSORS_LM87 */
 135
 136 static inline int
 137 efx_init_lm87(struct efx_nic *efx, struct i2c_board_info *info,
 138               const u8 *reg_values)
 139 {
 140         return 0;
 141 }
 142 static inline void efx_fini_lm87(struct efx_nic *efx)
 143 {
 144 }
 145 static inline int efx_check_lm87(struct efx_nic *efx, unsigned mask)
 146 {
 147         return 0;
 148 }
 149
 150 #endif /* CONFIG_SENSORS_LM87 */
 151
 152 /*****************************************************************************
 153  * Support for the SFE4002
 154  *
 155  */
 156 static u8 sfe4002_lm87_channel = 0x03; /* use AIN not FAN inputs */
 157
 158 static const u8 sfe4002_lm87_regs[] = {
 159         LM87_IN_LIMITS(0, 0x83, 0x91),          /* 2.5V:  1.8V +/- 5% */
 160         LM87_IN_LIMITS(1, 0x51, 0x5a),          /* Vccp1: 1.2V +/- 5% */
 161         LM87_IN_LIMITS(2, 0xb6, 0xca),          /* 3.3V:  3.3V +/- 5% */
 162         LM87_IN_LIMITS(3, 0xb0, 0xc9),          /* 5V:    4.6-5.2V */
 163         LM87_IN_LIMITS(4, 0xb0, 0xe0),          /* 12V:   11-14V */
 164         LM87_IN_LIMITS(5, 0x44, 0x4b),          /* Vccp2: 1.0V +/- 5% */
 165         LM87_AIN_LIMITS(0, 0xa0, 0xb2),         /* AIN1:  1.66V +/- 5% */
 166         LM87_AIN_LIMITS(1, 0x91, 0xa1),         /* AIN2:  1.5V +/- 5% */
 167         LM87_TEMP_INT_LIMITS(10, 60),           /* board */
 168         LM87_TEMP_EXT1_LIMITS(10, 70),          /* Falcon */
 169         0
 170 };
 171
 172 static struct i2c_board_info sfe4002_hwmon_info = {
 173         I2C_BOARD_INFO("lm87", 0x2e),
 174         .platform_data  = &sfe4002_lm87_channel,
 175         .irq            = -1,
 176 };
 177
 178 /****************************************************************************/
 179 /* LED allocations. Note that on rev A0 boards the schematic and the reality
 180  * differ: red and green are swapped. Below is the fixed (A1) layout (there
 181  * are only 3 A0 boards in existence, so no real reason to make this
 182  * conditional).
 183  */
 184 #define SFE4002_FAULT_LED (2)   /* Red */
 185 #define SFE4002_RX_LED    (0)   /* Green */
 186 #define SFE4002_TX_LED    (1)   /* Amber */
 187
 188 static int sfe4002_init_leds(struct efx_nic *efx)
 189 {
 190         /* Set the TX and RX LEDs to reflect status and activity, and the
 191          * fault LED off */
 192         xfp_set_led(efx, SFE4002_TX_LED,
 193                     QUAKE_LED_TXLINK | QUAKE_LED_LINK_ACTSTAT);
 194         xfp_set_led(efx, SFE4002_RX_LED,
 195                     QUAKE_LED_RXLINK | QUAKE_LED_LINK_ACTSTAT);
 196         xfp_set_led(efx, SFE4002_FAULT_LED, QUAKE_LED_OFF);
 197         efx->board_info.blinker.led_num = SFE4002_FAULT_LED;
 198         return 0;
 199 }
 200
 201 static void sfe4002_fault_led(struct efx_nic *efx, bool state)
 202 {
 203         xfp_set_led(efx, SFE4002_FAULT_LED, state ? QUAKE_LED_ON :
 204                         QUAKE_LED_OFF);
 205 }
 206
 207 static int sfe4002_check_hw(struct efx_nic *efx)
 208 {
 209         /* A0 board rev. 4002s report a temperature fault the whole time
 210          * (bad sensor) so we mask it out. */
 211         unsigned alarm_mask =
 212                 (efx->board_info.major == 0 && efx->board_info.minor == 0) ?
 213                 ~LM87_ALARM_TEMP_EXT1 : ~0;
 214
 215         return efx_check_lm87(efx, alarm_mask);
 216 }
 217
 218 static int sfe4002_init(struct efx_nic *efx)
 219 {
 220         int rc = efx_init_lm87(efx, &sfe4002_hwmon_info, sfe4002_lm87_regs);
 221         if (rc)
 222                 return rc;
 223         efx->board_info.monitor = sfe4002_check_hw;
 224         efx->board_info.init_leds = sfe4002_init_leds;
 225         efx->board_info.set_fault_led = sfe4002_fault_led;
 226         efx->board_info.blink = board_blink;
 227         efx->board_info.fini = efx_fini_lm87;
 228         return 0;
 229 }
 230
 231 /* This will get expanded as board-specific details get moved out of the
 232  * PHY drivers. */
 233 struct efx_board_data {
 234         const char *ref_model;
 235         const char *gen_type;
 236         int (*init) (struct efx_nic *nic);
 237 };
 238
 239 static int dummy_init(struct efx_nic *nic)
 240 {
 241         return 0;
 242 }
 243
 244 static struct efx_board_data board_data[] = {
 245         [EFX_BOARD_INVALID] =
 246         {NULL,      NULL,                  dummy_init},
 247         [EFX_BOARD_SFE4001] =
 248         {"SFE4001", "10GBASE-T adapter",   sfe4001_init},
 249         [EFX_BOARD_SFE4002] =
 250         {"SFE4002", "XFP adapter",         sfe4002_init},
 251 };
 252
 253 int efx_set_board_info(struct efx_nic *efx, u16 revision_info)
 254 {
 255         int rc = 0;
 256         struct efx_board_data *data;
 257
 258         if (BOARD_TYPE(revision_info) >= EFX_BOARD_MAX) {
 259                 EFX_ERR(efx, "squashing unknown board type %d\n",
 260                         BOARD_TYPE(revision_info));
 261                 revision_info = 0;
 262         }
 263
 264         if (BOARD_TYPE(revision_info) == 0) {
 265                 efx->board_info.major = 0;
 266                 efx->board_info.minor = 0;
 267                 /* For early boards that don't have revision info. there is
 268                  * only 1 board for each PHY type, so we can work it out, with
 269                  * the exception of the PHY-less boards. */
 270                 switch (efx->phy_type) {
 271                 case PHY_TYPE_10XPRESS:
 272                         efx->board_info.type = EFX_BOARD_SFE4001;
 273                         break;
 274                 case PHY_TYPE_XFP:
 275                         efx->board_info.type = EFX_BOARD_SFE4002;
 276                         break;
 277                 default:
 278                         efx->board_info.type = 0;
 279                         break;
 280                 }
 281         } else {
 282                 efx->board_info.type = BOARD_TYPE(revision_info);
 283                 efx->board_info.major = BOARD_MAJOR(revision_info);
 284                 efx->board_info.minor = BOARD_MINOR(revision_info);
 285         }
 286
 287         data = &board_data[efx->board_info.type];
 288
 289         /* Report the board model number or generic type for recognisable
 290          * boards. */
 291         if (efx->board_info.type != 0)
 292                 EFX_INFO(efx, "board is %s rev %c%d\n",
 293                          (efx->pci_dev->subsystem_vendor == EFX_VENDID_SFC)
 294                          ? data->ref_model : data->gen_type,
 295                          'A' + efx->board_info.major, efx->board_info.minor);
 296
 297         efx->board_info.init = data->init;
 298
 299         return rc;
 300 }