/****************************************************************************
* 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"
return rc;
}
-static int sfe4001_check_hw(struct efx_nic *efx)
+static int sfn4111t_reset(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;
+ efx_oword_t reg;
+
+ /* GPIO 3 and the GPIO register are shared with I2C, so block that */
+ mutex_lock(&efx->i2c_adap.bus_lock);
+
+ /* Pull RST_N (GPIO 2) low then let it up again, setting the
+ * FLASH_CFG_1 strap (GPIO 3) appropriately. Only change the
+ * output enables; the output levels should always be 0 (low)
+ * and we rely on external pull-ups. */
+ falcon_read(efx, ®, GPIO_CTL_REG_KER);
+ EFX_SET_OWORD_FIELD(reg, GPIO2_OEN, true);
+ falcon_write(efx, ®, GPIO_CTL_REG_KER);
+ msleep(1000);
+ EFX_SET_OWORD_FIELD(reg, GPIO2_OEN, false);
+ EFX_SET_OWORD_FIELD(reg, GPIO3_OEN,
+ !!(efx->phy_mode & PHY_MODE_SPECIAL));
+ falcon_write(efx, ®, GPIO_CTL_REG_KER);
+ msleep(1);
+
+ mutex_unlock(&efx->i2c_adap.bus_lock);
+
+ ssleep(1);
+ return 0;
}
-/* 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 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,
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_a0_hwmon_info = {
+ I2C_BOARD_INFO("max6647", 0x4e),
+ .irq = -1,
+};
+
+static struct i2c_board_info sfn4111t_r5_hwmon_info = {
+ I2C_BOARD_INFO("max6646", 0x4d),
+ .irq = -1,
+};
+
+int sfn4111t_init(struct efx_nic *efx)
+{
+ int rc;
+
+ efx->board_info.hwmon_client =
+ i2c_new_device(&efx->i2c_adap,
+ (efx->board_info.minor < 5) ?
+ &sfn4111t_a0_hwmon_info :
+ &sfn4111t_r5_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;
+}
projects / firefly-linux-kernel-4.4.55.git / blobdiff