diff options
Diffstat (limited to 'drivers/net/sfc/sfe4001.c')
| -rw-r--r-- | drivers/net/sfc/sfe4001.c | 435 |
1 files changed, 0 insertions, 435 deletions
diff --git a/drivers/net/sfc/sfe4001.c b/drivers/net/sfc/sfe4001.c deleted file mode 100644 index 28a55047cc9..00000000000 --- a/drivers/net/sfc/sfe4001.c +++ /dev/null @@ -1,435 +0,0 @@ -/**************************************************************************** - * Driver for Solarflare Solarstorm network controllers and boards - * 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 - * by the Free Software Foundation, incorporated herein by reference. - */ - -/***************************************************************************** - * 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 <linux/rtnetlink.h> -#include "net_driver.h" -#include "efx.h" -#include "phy.h" -#include "boards.h" -#include "falcon.h" -#include "falcon_hwdefs.h" -#include "falcon_io.h" -#include "mac.h" -#include "workarounds.h" - -/************************************************************************** - * - * I2C IO Expander device - * - **************************************************************************/ -#define PCA9539 0x74 - -#define P0_IN 0x00 -#define P0_OUT 0x02 -#define P0_INVERT 0x04 -#define P0_CONFIG 0x06 - -#define P0_EN_1V0X_LBN 0 -#define P0_EN_1V0X_WIDTH 1 -#define P0_EN_1V2_LBN 1 -#define P0_EN_1V2_WIDTH 1 -#define P0_EN_2V5_LBN 2 -#define P0_EN_2V5_WIDTH 1 -#define P0_EN_3V3X_LBN 3 -#define P0_EN_3V3X_WIDTH 1 -#define P0_EN_5V_LBN 4 -#define P0_EN_5V_WIDTH 1 -#define P0_SHORTEN_JTAG_LBN 5 -#define P0_SHORTEN_JTAG_WIDTH 1 -#define P0_X_TRST_LBN 6 -#define P0_X_TRST_WIDTH 1 -#define P0_DSP_RESET_LBN 7 -#define P0_DSP_RESET_WIDTH 1 - -#define P1_IN 0x01 -#define P1_OUT 0x03 -#define P1_INVERT 0x05 -#define P1_CONFIG 0x07 - -#define P1_AFE_PWD_LBN 0 -#define P1_AFE_PWD_WIDTH 1 -#define P1_DSP_PWD25_LBN 1 -#define P1_DSP_PWD25_WIDTH 1 -#define P1_RESERVED_LBN 2 -#define P1_RESERVED_WIDTH 2 -#define P1_SPARE_LBN 4 -#define P1_SPARE_WIDTH 4 - -/* Temperature Sensor */ -#define MAX664X_REG_RSL 0x02 -#define MAX664X_REG_WLHO 0x0B - -static void sfe4001_poweroff(struct efx_nic *efx) -{ - struct i2c_client *ioexp_client = efx->board_info.ioexp_client; - struct i2c_client *hwmon_client = efx->board_info.hwmon_client; - - /* Turn off all power rails and disable outputs */ - i2c_smbus_write_byte_data(ioexp_client, P0_OUT, 0xff); - i2c_smbus_write_byte_data(ioexp_client, P1_CONFIG, 0xff); - i2c_smbus_write_byte_data(ioexp_client, P0_CONFIG, 0xff); - - /* Clear any over-temperature alert */ - i2c_smbus_read_byte_data(hwmon_client, MAX664X_REG_RSL); -} - -static int sfe4001_poweron(struct efx_nic *efx) -{ - struct i2c_client *hwmon_client = efx->board_info.hwmon_client; - struct i2c_client *ioexp_client = efx->board_info.ioexp_client; - unsigned int i, j; - int rc; - u8 out; - - /* Clear any previous over-temperature alert */ - rc = i2c_smbus_read_byte_data(hwmon_client, MAX664X_REG_RSL); - if (rc < 0) - return rc; - - /* Enable port 0 and port 1 outputs on IO expander */ - rc = i2c_smbus_write_byte_data(ioexp_client, P0_CONFIG, 0x00); - if (rc) - return rc; - rc = i2c_smbus_write_byte_data(ioexp_client, P1_CONFIG, - 0xff & ~(1 << P1_SPARE_LBN)); - if (rc) - goto fail_on; - - /* If PHY power is on, turn it all off and wait 1 second to - * ensure a full reset. - */ - rc = i2c_smbus_read_byte_data(ioexp_client, P0_OUT); - if (rc < 0) - goto fail_on; - out = 0xff & ~((0 << P0_EN_1V2_LBN) | (0 << P0_EN_2V5_LBN) | - (0 << P0_EN_3V3X_LBN) | (0 << P0_EN_5V_LBN) | - (0 << P0_EN_1V0X_LBN)); - if (rc != out) { - EFX_INFO(efx, "power-cycling PHY\n"); - rc = i2c_smbus_write_byte_data(ioexp_client, P0_OUT, out); - if (rc) - goto fail_on; - schedule_timeout_uninterruptible(HZ); - } - - for (i = 0; i < 20; ++i) { - /* Turn on 1.2V, 2.5V, 3.3V and 5V power rails */ - out = 0xff & ~((1 << P0_EN_1V2_LBN) | (1 << P0_EN_2V5_LBN) | - (1 << P0_EN_3V3X_LBN) | (1 << P0_EN_5V_LBN) | - (1 << P0_X_TRST_LBN)); - if (efx->phy_mode & PHY_MODE_SPECIAL) - out |= 1 << P0_EN_3V3X_LBN; - - rc = i2c_smbus_write_byte_data(ioexp_client, P0_OUT, out); - if (rc) - goto fail_on; - msleep(10); - - /* Turn on 1V power rail */ - out &= ~(1 << P0_EN_1V0X_LBN); - rc = i2c_smbus_write_byte_data(ioexp_client, P0_OUT, out); - if (rc) - goto fail_on; - - EFX_INFO(efx, "waiting for DSP boot (attempt %d)...\n", i); - - /* In flash config mode, DSP does not turn on AFE, so - * just wait 1 second. - */ - if (efx->phy_mode & PHY_MODE_SPECIAL) { - schedule_timeout_uninterruptible(HZ); - return 0; - } - - for (j = 0; j < 10; ++j) { - msleep(100); - - /* Check DSP has asserted AFE power line */ - rc = i2c_smbus_read_byte_data(ioexp_client, P1_IN); - if (rc < 0) - goto fail_on; - if (rc & (1 << P1_AFE_PWD_LBN)) - return 0; - } - } - - EFX_INFO(efx, "timed out waiting for DSP boot\n"); - rc = -ETIMEDOUT; -fail_on: - sfe4001_poweroff(efx); - return rc; -} - -static int sfn4111t_reset(struct efx_nic *efx) -{ - 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; -} - -static ssize_t show_phy_flash_cfg(struct device *dev, - struct device_attribute *attr, char *buf) -{ - struct efx_nic *efx = pci_get_drvdata(to_pci_dev(dev)); - return sprintf(buf, "%d\n", !!(efx->phy_mode & PHY_MODE_SPECIAL)); -} - -static ssize_t set_phy_flash_cfg(struct device *dev, - struct device_attribute *attr, - const char *buf, size_t count) -{ - struct efx_nic *efx = pci_get_drvdata(to_pci_dev(dev)); - enum efx_phy_mode old_mode, new_mode; - int err; - - rtnl_lock(); - old_mode = efx->phy_mode; - if (count == 0 || *buf == '0') - new_mode = old_mode & ~PHY_MODE_SPECIAL; - else - new_mode = PHY_MODE_SPECIAL; - if (old_mode == new_mode) { - err = 0; - } else if (efx->state != STATE_RUNNING || netif_running(efx->net_dev)) { - err = -EBUSY; - } else { - /* Reset the PHY, reconfigure the MAC and enable/disable - * MAC stats accordingly. */ - efx->phy_mode = new_mode; - if (new_mode & PHY_MODE_SPECIAL) - efx_stats_disable(efx); - if (efx->board_info.type == FALCON_BOARD_SFE4001) - err = sfe4001_poweron(efx); - else - err = sfn4111t_reset(efx); - efx_reconfigure_port(efx); - if (!(new_mode & PHY_MODE_SPECIAL)) - efx_stats_enable(efx); - } - rtnl_unlock(); - - return err ? err : count; -} - -static DEVICE_ATTR(phy_flash_cfg, 0644, show_phy_flash_cfg, set_phy_flash_cfg); - -static void sfe4001_fini(struct efx_nic *efx) -{ - EFX_INFO(efx, "%s\n", __func__); - - device_remove_file(&efx->pci_dev->dev, &dev_attr_phy_flash_cfg); - sfe4001_poweroff(efx); - i2c_unregister_device(efx->board_info.ioexp_client); - 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), -}; - -/* 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) -{ - int rc; - -#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; - - /* 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_hwmon; - - efx->board_info.ioexp_client = i2c_new_dummy(&efx->i2c_adap, PCA9539); - if (!efx->board_info.ioexp_client) { - rc = -EIO; - goto fail_hwmon; - } - - /* 10Xpress has fixed-function LED pins, so there is no board-specific - * blink code. */ - efx->board_info.blink = tenxpress_phy_blink; - - efx->board_info.monitor = sfe4001_check_hw; - efx->board_info.fini = sfe4001_fini; - - if (efx->phy_mode & PHY_MODE_SPECIAL) { - /* PHY won't generate a 156.25 MHz clock and MAC stats fetch - * will fail. */ - efx_stats_disable(efx); - } - rc = sfe4001_poweron(efx); - if (rc) - goto fail_ioexp; - - rc = device_create_file(&efx->pci_dev->dev, &dev_attr_phy_flash_cfg); - if (rc) - goto fail_on; - - EFX_INFO(efx, "PHY is powered on\n"); - return 0; - -fail_on: - sfe4001_poweroff(efx); -fail_ioexp: - i2c_unregister_device(efx->board_info.ioexp_client); -fail_hwmon: - 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), -}; - -static struct i2c_board_info sfn4111t_r5_hwmon_info = { - I2C_BOARD_INFO("max6646", 0x4d), -}; - -int sfn4111t_init(struct efx_nic *efx) -{ - int i = 0; - 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; - - do { - if (efx->phy_mode & PHY_MODE_SPECIAL) { - /* PHY may not generate a 156.25 MHz clock and MAC - * stats fetch will fail. */ - efx_stats_disable(efx); - sfn4111t_reset(efx); - } - rc = sft9001_wait_boot(efx); - if (rc == 0) - return 0; - efx->phy_mode = PHY_MODE_SPECIAL; - } while (rc == -EINVAL && ++i < 2); - - device_remove_file(&efx->pci_dev->dev, &dev_attr_phy_flash_cfg); -fail_hwmon: - i2c_unregister_device(efx->board_info.hwmon_client); - return rc; -} |