sfc: Use lm87 and lm90 drivers for board temperature/power monitoring
Add board monitoring to periodic work whenever link is down. For SFE4001, report when a fault has caused the PHY to turn off. For SFE4002, switch XFP PHY into low-power state in case of a fault. Signed-off-by: Ben Hutchings <bhutchings@solarflare.com> Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
This commit is contained in:
Ben Hutchings
committed by
Jeff Garzik
Jeff Garzik
parent
f41507245e
commit
3e133c44d2
@@ -11,6 +11,7 @@
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#include "phy.h"
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#include "boards.h"
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#include "efx.h"
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#include "workarounds.h"
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/* Macros for unpacking the board revision */
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/* The revision info is in host byte order. */
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@@ -51,10 +52,129 @@ static void board_blink(struct efx_nic *efx, bool blink)
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}
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}
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/*****************************************************************************
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* Support for LM87 sensor chip used on several boards
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*/
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#define LM87_REG_ALARMS1 0x41
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#define LM87_REG_ALARMS2 0x42
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#define LM87_IN_LIMITS(nr, _min, _max) \
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0x2B + (nr) * 2, _max, 0x2C + (nr) * 2, _min
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#define LM87_AIN_LIMITS(nr, _min, _max) \
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0x3B + (nr), _max, 0x1A + (nr), _min
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#define LM87_TEMP_INT_LIMITS(_min, _max) \
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0x39, _max, 0x3A, _min
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#define LM87_TEMP_EXT1_LIMITS(_min, _max) \
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0x37, _max, 0x38, _min
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#define LM87_ALARM_TEMP_INT 0x10
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#define LM87_ALARM_TEMP_EXT1 0x20
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#if defined(CONFIG_SENSORS_LM87) || defined(CONFIG_SENSORS_LM87_MODULE)
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static int efx_init_lm87(struct efx_nic *efx, struct i2c_board_info *info,
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const u8 *reg_values)
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{
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struct i2c_client *client = i2c_new_device(&efx->i2c_adap, info);
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int rc;
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if (!client)
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return -EIO;
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while (*reg_values) {
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u8 reg = *reg_values++;
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u8 value = *reg_values++;
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rc = i2c_smbus_write_byte_data(client, reg, value);
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if (rc)
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goto err;
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}
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efx->board_info.hwmon_client = client;
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return 0;
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err:
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i2c_unregister_device(client);
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return rc;
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}
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static void efx_fini_lm87(struct efx_nic *efx)
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{
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i2c_unregister_device(efx->board_info.hwmon_client);
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}
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static int efx_check_lm87(struct efx_nic *efx, unsigned mask)
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{
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struct i2c_client *client = efx->board_info.hwmon_client;
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s32 alarms1, alarms2;
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/* If link is up then do not monitor temperature */
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if (EFX_WORKAROUND_7884(efx) && efx->link_up)
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return 0;
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alarms1 = i2c_smbus_read_byte_data(client, LM87_REG_ALARMS1);
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alarms2 = i2c_smbus_read_byte_data(client, LM87_REG_ALARMS2);
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if (alarms1 < 0)
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return alarms1;
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if (alarms2 < 0)
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return alarms2;
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alarms1 &= mask;
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alarms2 &= mask >> 8;
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if (alarms1 || alarms2) {
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EFX_ERR(efx,
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"LM87 detected a hardware failure (status %02x:%02x)"
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"%s%s\n",
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alarms1, alarms2,
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(alarms1 & LM87_ALARM_TEMP_INT) ? " INTERNAL" : "",
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(alarms1 & LM87_ALARM_TEMP_EXT1) ? " EXTERNAL" : "");
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return -ERANGE;
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}
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return 0;
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}
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#else /* !CONFIG_SENSORS_LM87 */
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static inline int
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efx_init_lm87(struct efx_nic *efx, struct i2c_board_info *info,
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const u8 *reg_values)
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{
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return 0;
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}
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static inline void efx_fini_lm87(struct efx_nic *efx)
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{
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}
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static inline int efx_check_lm87(struct efx_nic *efx, unsigned mask)
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{
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return 0;
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}
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#endif /* CONFIG_SENSORS_LM87 */
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/*****************************************************************************
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* Support for the SFE4002
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*
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*/
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static u8 sfe4002_lm87_channel = 0x03; /* use AIN not FAN inputs */
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static const u8 sfe4002_lm87_regs[] = {
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LM87_IN_LIMITS(0, 0x83, 0x91), /* 2.5V: 1.8V +/- 5% */
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LM87_IN_LIMITS(1, 0x51, 0x5a), /* Vccp1: 1.2V +/- 5% */
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LM87_IN_LIMITS(2, 0xb6, 0xca), /* 3.3V: 3.3V +/- 5% */
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LM87_IN_LIMITS(3, 0xb0, 0xc9), /* 5V: 4.6-5.2V */
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LM87_IN_LIMITS(4, 0xb0, 0xe0), /* 12V: 11-14V */
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LM87_IN_LIMITS(5, 0x44, 0x4b), /* Vccp2: 1.0V +/- 5% */
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LM87_AIN_LIMITS(0, 0xa0, 0xb2), /* AIN1: 1.66V +/- 5% */
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LM87_AIN_LIMITS(1, 0x91, 0xa1), /* AIN2: 1.5V +/- 5% */
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LM87_TEMP_INT_LIMITS(10, 60), /* board */
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LM87_TEMP_EXT1_LIMITS(10, 70), /* Falcon */
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0
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};
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static struct i2c_board_info sfe4002_hwmon_info = {
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I2C_BOARD_INFO("lm87", 0x2e),
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.platform_data = &sfe4002_lm87_channel,
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.irq = -1,
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};
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/****************************************************************************/
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/* LED allocations. Note that on rev A0 boards the schematic and the reality
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* differ: red and green are swapped. Below is the fixed (A1) layout (there
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@@ -84,11 +204,27 @@ static void sfe4002_fault_led(struct efx_nic *efx, bool state)
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QUAKE_LED_OFF);
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}
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static int sfe4002_check_hw(struct efx_nic *efx)
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{
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/* A0 board rev. 4002s report a temperature fault the whole time
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* (bad sensor) so we mask it out. */
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unsigned alarm_mask =
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(efx->board_info.major == 0 && efx->board_info.minor == 0) ?
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~LM87_ALARM_TEMP_EXT1 : ~0;
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return efx_check_lm87(efx, alarm_mask);
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}
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static int sfe4002_init(struct efx_nic *efx)
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{
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int rc = efx_init_lm87(efx, &sfe4002_hwmon_info, sfe4002_lm87_regs);
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if (rc)
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return rc;
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efx->board_info.monitor = sfe4002_check_hw;
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efx->board_info.init_leds = sfe4002_init_leds;
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efx->board_info.set_fault_led = sfe4002_fault_led;
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efx->board_info.blink = board_blink;
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efx->board_info.fini = efx_fini_lm87;
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return 0;
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}
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