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-rw-r--r--drivers/net/ethernet/sfc/falcon/tenxpress.c491
1 files changed, 491 insertions, 0 deletions
diff --git a/drivers/net/ethernet/sfc/falcon/tenxpress.c b/drivers/net/ethernet/sfc/falcon/tenxpress.c
new file mode 100644
index 000000000..e27824ef1
--- /dev/null
+++ b/drivers/net/ethernet/sfc/falcon/tenxpress.c
@@ -0,0 +1,491 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/****************************************************************************
+ * Driver for Solarflare network controllers and boards
+ * Copyright 2007-2011 Solarflare Communications Inc.
+ */
+
+#include <linux/delay.h>
+#include <linux/rtnetlink.h>
+#include <linux/seq_file.h>
+#include <linux/slab.h>
+#include "efx.h"
+#include "mdio_10g.h"
+#include "nic.h"
+#include "phy.h"
+#include "workarounds.h"
+
+/* We expect these MMDs to be in the package. */
+#define TENXPRESS_REQUIRED_DEVS (MDIO_DEVS_PMAPMD | \
+ MDIO_DEVS_PCS | \
+ MDIO_DEVS_PHYXS | \
+ MDIO_DEVS_AN)
+
+#define SFX7101_LOOPBACKS ((1 << LOOPBACK_PHYXS) | \
+ (1 << LOOPBACK_PCS) | \
+ (1 << LOOPBACK_PMAPMD) | \
+ (1 << LOOPBACK_PHYXS_WS))
+
+/* We complain if we fail to see the link partner as 10G capable this many
+ * times in a row (must be > 1 as sampling the autoneg. registers is racy)
+ */
+#define MAX_BAD_LP_TRIES (5)
+
+/* Extended control register */
+#define PMA_PMD_XCONTROL_REG 49152
+#define PMA_PMD_EXT_GMII_EN_LBN 1
+#define PMA_PMD_EXT_GMII_EN_WIDTH 1
+#define PMA_PMD_EXT_CLK_OUT_LBN 2
+#define PMA_PMD_EXT_CLK_OUT_WIDTH 1
+#define PMA_PMD_LNPGA_POWERDOWN_LBN 8
+#define PMA_PMD_LNPGA_POWERDOWN_WIDTH 1
+#define PMA_PMD_EXT_CLK312_WIDTH 1
+#define PMA_PMD_EXT_LPOWER_LBN 12
+#define PMA_PMD_EXT_LPOWER_WIDTH 1
+#define PMA_PMD_EXT_ROBUST_LBN 14
+#define PMA_PMD_EXT_ROBUST_WIDTH 1
+#define PMA_PMD_EXT_SSR_LBN 15
+#define PMA_PMD_EXT_SSR_WIDTH 1
+
+/* extended status register */
+#define PMA_PMD_XSTATUS_REG 49153
+#define PMA_PMD_XSTAT_MDIX_LBN 14
+#define PMA_PMD_XSTAT_FLP_LBN (12)
+
+/* LED control register */
+#define PMA_PMD_LED_CTRL_REG 49159
+#define PMA_PMA_LED_ACTIVITY_LBN (3)
+
+/* LED function override register */
+#define PMA_PMD_LED_OVERR_REG 49161
+/* Bit positions for different LEDs (there are more but not wired on SFE4001)*/
+#define PMA_PMD_LED_LINK_LBN (0)
+#define PMA_PMD_LED_SPEED_LBN (2)
+#define PMA_PMD_LED_TX_LBN (4)
+#define PMA_PMD_LED_RX_LBN (6)
+/* Override settings */
+#define PMA_PMD_LED_AUTO (0) /* H/W control */
+#define PMA_PMD_LED_ON (1)
+#define PMA_PMD_LED_OFF (2)
+#define PMA_PMD_LED_FLASH (3)
+#define PMA_PMD_LED_MASK 3
+/* All LEDs under hardware control */
+/* Green and Amber under hardware control, Red off */
+#define SFX7101_PMA_PMD_LED_DEFAULT (PMA_PMD_LED_OFF << PMA_PMD_LED_RX_LBN)
+
+#define PMA_PMD_SPEED_ENABLE_REG 49192
+#define PMA_PMD_100TX_ADV_LBN 1
+#define PMA_PMD_100TX_ADV_WIDTH 1
+#define PMA_PMD_1000T_ADV_LBN 2
+#define PMA_PMD_1000T_ADV_WIDTH 1
+#define PMA_PMD_10000T_ADV_LBN 3
+#define PMA_PMD_10000T_ADV_WIDTH 1
+#define PMA_PMD_SPEED_LBN 4
+#define PMA_PMD_SPEED_WIDTH 4
+
+/* Misc register defines */
+#define PCS_CLOCK_CTRL_REG 55297
+#define PLL312_RST_N_LBN 2
+
+#define PCS_SOFT_RST2_REG 55302
+#define SERDES_RST_N_LBN 13
+#define XGXS_RST_N_LBN 12
+
+#define PCS_TEST_SELECT_REG 55303 /* PRM 10.5.8 */
+#define CLK312_EN_LBN 3
+
+/* PHYXS registers */
+#define PHYXS_XCONTROL_REG 49152
+#define PHYXS_RESET_LBN 15
+#define PHYXS_RESET_WIDTH 1
+
+#define PHYXS_TEST1 (49162)
+#define LOOPBACK_NEAR_LBN (8)
+#define LOOPBACK_NEAR_WIDTH (1)
+
+/* Boot status register */
+#define PCS_BOOT_STATUS_REG 53248
+#define PCS_BOOT_FATAL_ERROR_LBN 0
+#define PCS_BOOT_PROGRESS_LBN 1
+#define PCS_BOOT_PROGRESS_WIDTH 2
+#define PCS_BOOT_PROGRESS_INIT 0
+#define PCS_BOOT_PROGRESS_WAIT_MDIO 1
+#define PCS_BOOT_PROGRESS_CHECKSUM 2
+#define PCS_BOOT_PROGRESS_JUMP 3
+#define PCS_BOOT_DOWNLOAD_WAIT_LBN 3
+#define PCS_BOOT_CODE_STARTED_LBN 4
+
+/* 100M/1G PHY registers */
+#define GPHY_XCONTROL_REG 49152
+#define GPHY_ISOLATE_LBN 10
+#define GPHY_ISOLATE_WIDTH 1
+#define GPHY_DUPLEX_LBN 8
+#define GPHY_DUPLEX_WIDTH 1
+#define GPHY_LOOPBACK_NEAR_LBN 14
+#define GPHY_LOOPBACK_NEAR_WIDTH 1
+
+#define C22EXT_STATUS_REG 49153
+#define C22EXT_STATUS_LINK_LBN 2
+#define C22EXT_STATUS_LINK_WIDTH 1
+
+#define C22EXT_MSTSLV_CTRL 49161
+#define C22EXT_MSTSLV_CTRL_ADV_1000_HD_LBN 8
+#define C22EXT_MSTSLV_CTRL_ADV_1000_FD_LBN 9
+
+#define C22EXT_MSTSLV_STATUS 49162
+#define C22EXT_MSTSLV_STATUS_LP_1000_HD_LBN 10
+#define C22EXT_MSTSLV_STATUS_LP_1000_FD_LBN 11
+
+/* Time to wait between powering down the LNPGA and turning off the power
+ * rails */
+#define LNPGA_PDOWN_WAIT (HZ / 5)
+
+struct tenxpress_phy_data {
+ enum ef4_loopback_mode loopback_mode;
+ enum ef4_phy_mode phy_mode;
+ int bad_lp_tries;
+};
+
+static int tenxpress_init(struct ef4_nic *efx)
+{
+ /* Enable 312.5 MHz clock */
+ ef4_mdio_write(efx, MDIO_MMD_PCS, PCS_TEST_SELECT_REG,
+ 1 << CLK312_EN_LBN);
+
+ /* Set the LEDs up as: Green = Link, Amber = Link/Act, Red = Off */
+ ef4_mdio_set_flag(efx, MDIO_MMD_PMAPMD, PMA_PMD_LED_CTRL_REG,
+ 1 << PMA_PMA_LED_ACTIVITY_LBN, true);
+ ef4_mdio_write(efx, MDIO_MMD_PMAPMD, PMA_PMD_LED_OVERR_REG,
+ SFX7101_PMA_PMD_LED_DEFAULT);
+
+ return 0;
+}
+
+static int tenxpress_phy_probe(struct ef4_nic *efx)
+{
+ struct tenxpress_phy_data *phy_data;
+
+ /* Allocate phy private storage */
+ phy_data = kzalloc(sizeof(*phy_data), GFP_KERNEL);
+ if (!phy_data)
+ return -ENOMEM;
+ efx->phy_data = phy_data;
+ phy_data->phy_mode = efx->phy_mode;
+
+ efx->mdio.mmds = TENXPRESS_REQUIRED_DEVS;
+ efx->mdio.mode_support = MDIO_SUPPORTS_C45;
+
+ efx->loopback_modes = SFX7101_LOOPBACKS | FALCON_XMAC_LOOPBACKS;
+
+ efx->link_advertising = (ADVERTISED_TP | ADVERTISED_Autoneg |
+ ADVERTISED_10000baseT_Full);
+
+ return 0;
+}
+
+static int tenxpress_phy_init(struct ef4_nic *efx)
+{
+ int rc;
+
+ falcon_board(efx)->type->init_phy(efx);
+
+ if (!(efx->phy_mode & PHY_MODE_SPECIAL)) {
+ rc = ef4_mdio_wait_reset_mmds(efx, TENXPRESS_REQUIRED_DEVS);
+ if (rc < 0)
+ return rc;
+
+ rc = ef4_mdio_check_mmds(efx, TENXPRESS_REQUIRED_DEVS);
+ if (rc < 0)
+ return rc;
+ }
+
+ rc = tenxpress_init(efx);
+ if (rc < 0)
+ return rc;
+
+ /* Reinitialise flow control settings */
+ ef4_link_set_wanted_fc(efx, efx->wanted_fc);
+ ef4_mdio_an_reconfigure(efx);
+
+ schedule_timeout_uninterruptible(HZ / 5); /* 200ms */
+
+ /* Let XGXS and SerDes out of reset */
+ falcon_reset_xaui(efx);
+
+ return 0;
+}
+
+/* Perform a "special software reset" on the PHY. The caller is
+ * responsible for saving and restoring the PHY hardware registers
+ * properly, and masking/unmasking LASI */
+static int tenxpress_special_reset(struct ef4_nic *efx)
+{
+ int rc, reg;
+
+ /* The XGMAC clock is driven from the SFX7101 312MHz clock, so
+ * a special software reset can glitch the XGMAC sufficiently for stats
+ * requests to fail. */
+ falcon_stop_nic_stats(efx);
+
+ /* Initiate reset */
+ reg = ef4_mdio_read(efx, MDIO_MMD_PMAPMD, PMA_PMD_XCONTROL_REG);
+ reg |= (1 << PMA_PMD_EXT_SSR_LBN);
+ ef4_mdio_write(efx, MDIO_MMD_PMAPMD, PMA_PMD_XCONTROL_REG, reg);
+
+ mdelay(200);
+
+ /* Wait for the blocks to come out of reset */
+ rc = ef4_mdio_wait_reset_mmds(efx, TENXPRESS_REQUIRED_DEVS);
+ if (rc < 0)
+ goto out;
+
+ /* Try and reconfigure the device */
+ rc = tenxpress_init(efx);
+ if (rc < 0)
+ goto out;
+
+ /* Wait for the XGXS state machine to churn */
+ mdelay(10);
+out:
+ falcon_start_nic_stats(efx);
+ return rc;
+}
+
+static void sfx7101_check_bad_lp(struct ef4_nic *efx, bool link_ok)
+{
+ struct tenxpress_phy_data *pd = efx->phy_data;
+ bool bad_lp;
+ int reg;
+
+ if (link_ok) {
+ bad_lp = false;
+ } else {
+ /* Check that AN has started but not completed. */
+ reg = ef4_mdio_read(efx, MDIO_MMD_AN, MDIO_STAT1);
+ if (!(reg & MDIO_AN_STAT1_LPABLE))
+ return; /* LP status is unknown */
+ bad_lp = !(reg & MDIO_AN_STAT1_COMPLETE);
+ if (bad_lp)
+ pd->bad_lp_tries++;
+ }
+
+ /* Nothing to do if all is well and was previously so. */
+ if (!pd->bad_lp_tries)
+ return;
+
+ /* Use the RX (red) LED as an error indicator once we've seen AN
+ * failure several times in a row, and also log a message. */
+ if (!bad_lp || pd->bad_lp_tries == MAX_BAD_LP_TRIES) {
+ reg = ef4_mdio_read(efx, MDIO_MMD_PMAPMD,
+ PMA_PMD_LED_OVERR_REG);
+ reg &= ~(PMA_PMD_LED_MASK << PMA_PMD_LED_RX_LBN);
+ if (!bad_lp) {
+ reg |= PMA_PMD_LED_OFF << PMA_PMD_LED_RX_LBN;
+ } else {
+ reg |= PMA_PMD_LED_FLASH << PMA_PMD_LED_RX_LBN;
+ netif_err(efx, link, efx->net_dev,
+ "appears to be plugged into a port"
+ " that is not 10GBASE-T capable. The PHY"
+ " supports 10GBASE-T ONLY, so no link can"
+ " be established\n");
+ }
+ ef4_mdio_write(efx, MDIO_MMD_PMAPMD,
+ PMA_PMD_LED_OVERR_REG, reg);
+ pd->bad_lp_tries = bad_lp;
+ }
+}
+
+static bool sfx7101_link_ok(struct ef4_nic *efx)
+{
+ return ef4_mdio_links_ok(efx,
+ MDIO_DEVS_PMAPMD |
+ MDIO_DEVS_PCS |
+ MDIO_DEVS_PHYXS);
+}
+
+static void tenxpress_ext_loopback(struct ef4_nic *efx)
+{
+ ef4_mdio_set_flag(efx, MDIO_MMD_PHYXS, PHYXS_TEST1,
+ 1 << LOOPBACK_NEAR_LBN,
+ efx->loopback_mode == LOOPBACK_PHYXS);
+}
+
+static void tenxpress_low_power(struct ef4_nic *efx)
+{
+ ef4_mdio_set_mmds_lpower(
+ efx, !!(efx->phy_mode & PHY_MODE_LOW_POWER),
+ TENXPRESS_REQUIRED_DEVS);
+}
+
+static int tenxpress_phy_reconfigure(struct ef4_nic *efx)
+{
+ struct tenxpress_phy_data *phy_data = efx->phy_data;
+ bool phy_mode_change, loop_reset;
+
+ if (efx->phy_mode & (PHY_MODE_OFF | PHY_MODE_SPECIAL)) {
+ phy_data->phy_mode = efx->phy_mode;
+ return 0;
+ }
+
+ phy_mode_change = (efx->phy_mode == PHY_MODE_NORMAL &&
+ phy_data->phy_mode != PHY_MODE_NORMAL);
+ loop_reset = (LOOPBACK_OUT_OF(phy_data, efx, LOOPBACKS_EXTERNAL(efx)) ||
+ LOOPBACK_CHANGED(phy_data, efx, 1 << LOOPBACK_GPHY));
+
+ if (loop_reset || phy_mode_change) {
+ tenxpress_special_reset(efx);
+ falcon_reset_xaui(efx);
+ }
+
+ tenxpress_low_power(efx);
+ ef4_mdio_transmit_disable(efx);
+ ef4_mdio_phy_reconfigure(efx);
+ tenxpress_ext_loopback(efx);
+ ef4_mdio_an_reconfigure(efx);
+
+ phy_data->loopback_mode = efx->loopback_mode;
+ phy_data->phy_mode = efx->phy_mode;
+
+ return 0;
+}
+
+/* Poll for link state changes */
+static bool tenxpress_phy_poll(struct ef4_nic *efx)
+{
+ struct ef4_link_state old_state = efx->link_state;
+
+ efx->link_state.up = sfx7101_link_ok(efx);
+ efx->link_state.speed = 10000;
+ efx->link_state.fd = true;
+ efx->link_state.fc = ef4_mdio_get_pause(efx);
+
+ sfx7101_check_bad_lp(efx, efx->link_state.up);
+
+ return !ef4_link_state_equal(&efx->link_state, &old_state);
+}
+
+static void sfx7101_phy_fini(struct ef4_nic *efx)
+{
+ int reg;
+
+ /* Power down the LNPGA */
+ reg = (1 << PMA_PMD_LNPGA_POWERDOWN_LBN);
+ ef4_mdio_write(efx, MDIO_MMD_PMAPMD, PMA_PMD_XCONTROL_REG, reg);
+
+ /* Waiting here ensures that the board fini, which can turn
+ * off the power to the PHY, won't get run until the LNPGA
+ * powerdown has been given long enough to complete. */
+ schedule_timeout_uninterruptible(LNPGA_PDOWN_WAIT); /* 200 ms */
+}
+
+static void tenxpress_phy_remove(struct ef4_nic *efx)
+{
+ kfree(efx->phy_data);
+ efx->phy_data = NULL;
+}
+
+
+/* Override the RX, TX and link LEDs */
+void tenxpress_set_id_led(struct ef4_nic *efx, enum ef4_led_mode mode)
+{
+ int reg;
+
+ switch (mode) {
+ case EF4_LED_OFF:
+ reg = (PMA_PMD_LED_OFF << PMA_PMD_LED_TX_LBN) |
+ (PMA_PMD_LED_OFF << PMA_PMD_LED_RX_LBN) |
+ (PMA_PMD_LED_OFF << PMA_PMD_LED_LINK_LBN);
+ break;
+ case EF4_LED_ON:
+ reg = (PMA_PMD_LED_ON << PMA_PMD_LED_TX_LBN) |
+ (PMA_PMD_LED_ON << PMA_PMD_LED_RX_LBN) |
+ (PMA_PMD_LED_ON << PMA_PMD_LED_LINK_LBN);
+ break;
+ default:
+ reg = SFX7101_PMA_PMD_LED_DEFAULT;
+ break;
+ }
+
+ ef4_mdio_write(efx, MDIO_MMD_PMAPMD, PMA_PMD_LED_OVERR_REG, reg);
+}
+
+static const char *const sfx7101_test_names[] = {
+ "bist"
+};
+
+static const char *sfx7101_test_name(struct ef4_nic *efx, unsigned int index)
+{
+ if (index < ARRAY_SIZE(sfx7101_test_names))
+ return sfx7101_test_names[index];
+ return NULL;
+}
+
+static int
+sfx7101_run_tests(struct ef4_nic *efx, int *results, unsigned flags)
+{
+ int rc;
+
+ if (!(flags & ETH_TEST_FL_OFFLINE))
+ return 0;
+
+ /* BIST is automatically run after a special software reset */
+ rc = tenxpress_special_reset(efx);
+ results[0] = rc ? -1 : 1;
+
+ ef4_mdio_an_reconfigure(efx);
+
+ return rc;
+}
+
+static void
+tenxpress_get_link_ksettings(struct ef4_nic *efx,
+ struct ethtool_link_ksettings *cmd)
+{
+ u32 adv = 0, lpa = 0;
+ int reg;
+
+ reg = ef4_mdio_read(efx, MDIO_MMD_AN, MDIO_AN_10GBT_CTRL);
+ if (reg & MDIO_AN_10GBT_CTRL_ADV10G)
+ adv |= ADVERTISED_10000baseT_Full;
+ reg = ef4_mdio_read(efx, MDIO_MMD_AN, MDIO_AN_10GBT_STAT);
+ if (reg & MDIO_AN_10GBT_STAT_LP10G)
+ lpa |= ADVERTISED_10000baseT_Full;
+
+ mdio45_ethtool_ksettings_get_npage(&efx->mdio, cmd, adv, lpa);
+
+ /* In loopback, the PHY automatically brings up the correct interface,
+ * but doesn't advertise the correct speed. So override it */
+ if (LOOPBACK_EXTERNAL(efx))
+ cmd->base.speed = SPEED_10000;
+}
+
+static int
+tenxpress_set_link_ksettings(struct ef4_nic *efx,
+ const struct ethtool_link_ksettings *cmd)
+{
+ if (!cmd->base.autoneg)
+ return -EINVAL;
+
+ return ef4_mdio_set_link_ksettings(efx, cmd);
+}
+
+static void sfx7101_set_npage_adv(struct ef4_nic *efx, u32 advertising)
+{
+ ef4_mdio_set_flag(efx, MDIO_MMD_AN, MDIO_AN_10GBT_CTRL,
+ MDIO_AN_10GBT_CTRL_ADV10G,
+ advertising & ADVERTISED_10000baseT_Full);
+}
+
+const struct ef4_phy_operations falcon_sfx7101_phy_ops = {
+ .probe = tenxpress_phy_probe,
+ .init = tenxpress_phy_init,
+ .reconfigure = tenxpress_phy_reconfigure,
+ .poll = tenxpress_phy_poll,
+ .fini = sfx7101_phy_fini,
+ .remove = tenxpress_phy_remove,
+ .get_link_ksettings = tenxpress_get_link_ksettings,
+ .set_link_ksettings = tenxpress_set_link_ksettings,
+ .set_npage_adv = sfx7101_set_npage_adv,
+ .test_alive = ef4_mdio_test_alive,
+ .test_name = sfx7101_test_name,
+ .run_tests = sfx7101_run_tests,
+};
generated by cgit v1.2.3 (git 2.39.1) at 2024-10-31 17:52:54 +0000