diff options
Diffstat (limited to 'drivers/net/sfc/sfe4001.c')
| -rw-r--r-- | drivers/net/sfc/sfe4001.c | 116 |
1 files changed, 53 insertions, 63 deletions
diff --git a/drivers/net/sfc/sfe4001.c b/drivers/net/sfc/sfe4001.c index fe4e3fd22330..aa576c559ec8 100644 --- a/drivers/net/sfc/sfe4001.c +++ b/drivers/net/sfc/sfe4001.c @@ -21,6 +21,7 @@ #include "falcon_hwdefs.h" #include "falcon_io.h" #include "mac.h" +#include "workarounds.h" /************************************************************************** * @@ -65,48 +66,9 @@ #define P1_SPARE_LBN 4 #define P1_SPARE_WIDTH 4 - -/************************************************************************** - * - * Temperature Sensor - * - **************************************************************************/ -#define MAX6647 0x4e - -#define RLTS 0x00 -#define RLTE 0x01 -#define RSL 0x02 -#define RCL 0x03 -#define RCRA 0x04 -#define RLHN 0x05 -#define RLLI 0x06 -#define RRHI 0x07 -#define RRLS 0x08 -#define WCRW 0x0a -#define WLHO 0x0b -#define WRHA 0x0c -#define WRLN 0x0e -#define OSHT 0x0f -#define REET 0x10 -#define RIET 0x11 -#define RWOE 0x19 -#define RWOI 0x20 -#define HYS 0x21 -#define QUEUE 0x22 -#define MFID 0xfe -#define REVID 0xff - -/* Status bits */ -#define MAX6647_BUSY (1 << 7) /* ADC is converting */ -#define MAX6647_LHIGH (1 << 6) /* Local high temp. alarm */ -#define MAX6647_LLOW (1 << 5) /* Local low temp. alarm */ -#define MAX6647_RHIGH (1 << 4) /* Remote high temp. alarm */ -#define MAX6647_RLOW (1 << 3) /* Remote low temp. alarm */ -#define MAX6647_FAULT (1 << 2) /* DXN/DXP short/open circuit */ -#define MAX6647_EOT (1 << 1) /* Remote junction overtemp. */ -#define MAX6647_IOT (1 << 0) /* Local junction overtemp. */ - -static const u8 xgphy_max_temperature = 90; +/* Temperature Sensor */ +#define MAX664X_REG_RSL 0x02 +#define MAX664X_REG_WLHO 0x0B static void sfe4001_poweroff(struct efx_nic *efx) { @@ -119,7 +81,7 @@ static void sfe4001_poweroff(struct efx_nic *efx) i2c_smbus_write_byte_data(ioexp_client, P0_CONFIG, 0xff); /* Clear any over-temperature alert */ - i2c_smbus_read_byte_data(hwmon_client, RSL); + i2c_smbus_read_byte_data(hwmon_client, MAX664X_REG_RSL); } static int sfe4001_poweron(struct efx_nic *efx) @@ -131,7 +93,7 @@ static int sfe4001_poweron(struct efx_nic *efx) u8 out; /* Clear any previous over-temperature alert */ - rc = i2c_smbus_read_byte_data(hwmon_client, RSL); + rc = i2c_smbus_read_byte_data(hwmon_client, MAX664X_REG_RSL); if (rc < 0) return rc; @@ -209,6 +171,34 @@ fail_on: return rc; } +static int sfe4001_check_hw(struct efx_nic *efx) +{ + s32 status; + + /* If XAUI link is up then do not monitor */ + if (EFX_WORKAROUND_7884(efx) && falcon_xaui_link_ok(efx)) + return 0; + + /* Check the powered status of the PHY. Lack of power implies that + * the MAX6647 has shut down power to it, probably due to a temp. + * alarm. Reading the power status rather than the MAX6647 status + * directly because the later is read-to-clear and would thus + * start to power up the PHY again when polled, causing us to blip + * the power undesirably. + * We know we can read from the IO expander because we did + * it during power-on. Assume failure now is bad news. */ + status = i2c_smbus_read_byte_data(efx->board_info.ioexp_client, P1_IN); + if (status >= 0 && + (status & ((1 << P1_AFE_PWD_LBN) | (1 << P1_DSP_PWD25_LBN))) != 0) + return 0; + + /* Use board power control, not PHY power control */ + sfe4001_poweroff(efx); + efx->phy_mode = PHY_MODE_OFF; + + return (status < 0) ? -EIO : -ERANGE; +} + /* On SFE4001 rev A2 and later, we can control the FLASH_CFG_1 pin * using the 3V3X output of the IO-expander. Allow the user to set * this when the device is stopped, and keep it stopped then. @@ -261,35 +251,34 @@ static void sfe4001_fini(struct efx_nic *efx) i2c_unregister_device(efx->board_info.hwmon_client); } +static struct i2c_board_info sfe4001_hwmon_info = { + I2C_BOARD_INFO("max6647", 0x4e), + .irq = -1, +}; + /* This board uses an I2C expander to provider power to the PHY, which needs to * be turned on before the PHY can be used. * Context: Process context, rtnl lock held */ int sfe4001_init(struct efx_nic *efx) { - struct i2c_client *hwmon_client; int rc; - hwmon_client = i2c_new_dummy(&efx->i2c_adap, MAX6647); - if (!hwmon_client) +#if defined(CONFIG_SENSORS_LM90) || defined(CONFIG_SENSORS_LM90_MODULE) + efx->board_info.hwmon_client = + i2c_new_device(&efx->i2c_adap, &sfe4001_hwmon_info); +#else + efx->board_info.hwmon_client = + i2c_new_dummy(&efx->i2c_adap, sfe4001_hwmon_info.addr); +#endif + if (!efx->board_info.hwmon_client) return -EIO; - efx->board_info.hwmon_client = hwmon_client; - /* Set DSP over-temperature alert threshold */ - EFX_INFO(efx, "DSP cut-out at %dC\n", xgphy_max_temperature); - rc = i2c_smbus_write_byte_data(hwmon_client, WLHO, - xgphy_max_temperature); + /* Raise board/PHY high limit from 85 to 90 degrees Celsius */ + rc = i2c_smbus_write_byte_data(efx->board_info.hwmon_client, + MAX664X_REG_WLHO, 90); if (rc) - goto fail_ioexp; - - /* Read it back and verify */ - rc = i2c_smbus_read_byte_data(hwmon_client, RLHN); - if (rc < 0) - goto fail_ioexp; - if (rc != xgphy_max_temperature) { - rc = -EFAULT; - goto fail_ioexp; - } + goto fail_hwmon; efx->board_info.ioexp_client = i2c_new_dummy(&efx->i2c_adap, PCA9539); if (!efx->board_info.ioexp_client) { @@ -301,6 +290,7 @@ int sfe4001_init(struct efx_nic *efx) * blink code. */ efx->board_info.blink = tenxpress_phy_blink; + efx->board_info.monitor = sfe4001_check_hw; efx->board_info.fini = sfe4001_fini; rc = sfe4001_poweron(efx); @@ -319,6 +309,6 @@ fail_on: fail_ioexp: i2c_unregister_device(efx->board_info.ioexp_client); fail_hwmon: - i2c_unregister_device(hwmon_client); + i2c_unregister_device(efx->board_info.hwmon_client); return rc; } |