/****************************************************************************
* Driver for Solarflare Solarstorm network controllers and boards
- * Copyright 2007 Solarflare Communications Inc.
+ * Copyright 2007-2008 Solarflare Communications Inc.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 as published
*/
/*****************************************************************************
- * Support for the SFE4001 NIC: driver code for the PCA9539 I/O expander that
- * controls the PHY power rails, and for the MAX6647 temp. sensor used to check
- * the PHY
+ * Support for the SFE4001 and SFN4111T NICs.
+ *
+ * The SFE4001 does not power-up fully at reset due to its high power
+ * consumption. We control its power via a PCA9539 I/O expander.
+ * Both boards have a MAX6647 temperature monitor which we expose to
+ * the lm90 driver.
+ *
+ * This also provides minimal support for reflashing the PHY, which is
+ * initiated by resetting it with the FLASH_CFG_1 pin pulled down.
+ * On SFE4001 rev A2 and later this is connected to the 3V3X output of
+ * the IO-expander; on the SFN4111T it is connected to Falcon's GPIO3.
+ * We represent reflash mode as PHY_MODE_SPECIAL and make it mutually
+ * exclusive with the network device being open.
*/
+
#include <linux/delay.h>
#include "net_driver.h"
#include "efx.h"
#include "falcon_hwdefs.h"
#include "falcon_io.h"
#include "mac.h"
+#include "workarounds.h"
/**************************************************************************
*
#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)
{
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)
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;
return rc;
}
-/* 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.
- */
+static int sfn4111t_reset(struct efx_nic *efx)
+{
+ efx_oword_t reg;
+
+ /* GPIO pins are also used for I2C, so block that temporarily */
+ mutex_lock(&efx->i2c_adap.bus_lock);
+
+ falcon_read(efx, ®, GPIO_CTL_REG_KER);
+ EFX_SET_OWORD_FIELD(reg, GPIO2_OEN, true);
+ EFX_SET_OWORD_FIELD(reg, GPIO2_OUT, false);
+ falcon_write(efx, ®, GPIO_CTL_REG_KER);
+ msleep(1000);
+ EFX_SET_OWORD_FIELD(reg, GPIO2_OUT, true);
+ EFX_SET_OWORD_FIELD(reg, GPIO3_OEN, true);
+ EFX_SET_OWORD_FIELD(reg, GPIO3_OUT,
+ !(efx->phy_mode & PHY_MODE_SPECIAL));
+ falcon_write(efx, ®, GPIO_CTL_REG_KER);
+
+ mutex_unlock(&efx->i2c_adap.bus_lock);
+
+ ssleep(1);
+ return 0;
+}
static ssize_t show_phy_flash_cfg(struct device *dev,
struct device_attribute *attr, char *buf)
err = -EBUSY;
} else {
efx->phy_mode = new_mode;
- err = sfe4001_poweron(efx);
+ if (efx->board_info.type == EFX_BOARD_SFE4001)
+ err = sfe4001_poweron(efx);
+ else
+ err = sfn4111t_reset(efx);
efx_reconfigure_port(efx);
}
rtnl_unlock();
i2c_unregister_device(efx->board_info.hwmon_client);
}
+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) && efx->mac_up)
+ 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;
+}
+
+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) {
* 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);
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;
+}
+
+static int sfn4111t_check_hw(struct efx_nic *efx)
+{
+ s32 status;
+
+ /* If XAUI link is up then do not monitor */
+ if (EFX_WORKAROUND_7884(efx) && efx->mac_up)
+ return 0;
+
+ /* Test LHIGH, RHIGH, FAULT, EOT and IOT alarms */
+ status = i2c_smbus_read_byte_data(efx->board_info.hwmon_client,
+ MAX664X_REG_RSL);
+ if (status < 0)
+ return -EIO;
+ if (status & 0x57)
+ return -ERANGE;
+ return 0;
+}
+
+static void sfn4111t_fini(struct efx_nic *efx)
+{
+ EFX_INFO(efx, "%s\n", __func__);
+
+ device_remove_file(&efx->pci_dev->dev, &dev_attr_phy_flash_cfg);
+ i2c_unregister_device(efx->board_info.hwmon_client);
+}
+
+static struct i2c_board_info sfn4111t_hwmon_info = {
+ I2C_BOARD_INFO("max6647", 0x4e),
+ .irq = -1,
+};
+
+int sfn4111t_init(struct efx_nic *efx)
+{
+ int rc;
+
+ efx->board_info.hwmon_client =
+ i2c_new_device(&efx->i2c_adap, &sfn4111t_hwmon_info);
+ if (!efx->board_info.hwmon_client)
+ return -EIO;
+
+ efx->board_info.blink = tenxpress_phy_blink;
+ efx->board_info.monitor = sfn4111t_check_hw;
+ efx->board_info.fini = sfn4111t_fini;
+
+ rc = device_create_file(&efx->pci_dev->dev, &dev_attr_phy_flash_cfg);
+ if (rc)
+ goto fail_hwmon;
+
+ if (efx->phy_mode & PHY_MODE_SPECIAL)
+ sfn4111t_reset(efx);
+
+ return 0;
+
+fail_hwmon:
+ i2c_unregister_device(efx->board_info.hwmon_client);
return rc;
}
git.openpandora.org / pandora-kernel.git / blobdiff