summaryrefslogtreecommitdiffstats
path: root/drivers/net/sfc/sfe4001.c
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/net/sfc/sfe4001.c')
-rw-r--r--drivers/net/sfc/sfe4001.c435
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 49eb91b..0000000
--- 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 */
- i2c_lock_adapter(&efx->i2c_adap);
-
- /* 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, &reg, GPIO_CTL_REG_KER);
- EFX_SET_OWORD_FIELD(reg, GPIO2_OEN, true);
- falcon_write(efx, &reg, 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, &reg, GPIO_CTL_REG_KER);
- msleep(1);
-
- i2c_unlock_adapter(&efx->i2c_adap);
-
- 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 == EFX_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;
-}
OpenPOWER on IntegriCloud