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authorSean Wang <sean.wang@mediatek.com>2019-06-01 03:03:13 +0300
committerDavid S. Miller <davem@davemloft.net>2019-06-04 01:00:00 +0300
commit7093f9d80c7cb82f47628d6477fd4dc252d21a10 (patch)
treec9214e2966dceed931f27158310006070441ef8f /drivers/net/ethernet/mediatek/mtk_eth_path.c
parent9ffee4a8276c734956b8eab19d1c9b0ecb6b79c5 (diff)
downloadlinux-7093f9d80c7cb82f47628d6477fd4dc252d21a10.tar.xz
net: ethernet: mediatek: Integrate hardware path from GMAC to PHY variants
All path route on various SoCs all would be managed in common function mtk_setup_hw_path that is determined by the both applied devicetree regarding the path between GMAC and the target PHY or switch by the capability of target SoC in the runtime. Signed-off-by: Sean Wang <sean.wang@mediatek.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/ethernet/mediatek/mtk_eth_path.c')
-rw-r--r--drivers/net/ethernet/mediatek/mtk_eth_path.c323
1 files changed, 323 insertions, 0 deletions
diff --git a/drivers/net/ethernet/mediatek/mtk_eth_path.c b/drivers/net/ethernet/mediatek/mtk_eth_path.c
new file mode 100644
index 000000000000..61f705d945e5
--- /dev/null
+++ b/drivers/net/ethernet/mediatek/mtk_eth_path.c
@@ -0,0 +1,323 @@
+// SPDX-License-Identifier: GPL-2.0
+// Copyright (c) 2018-2019 MediaTek Inc.
+
+/* A library for configuring path from GMAC/GDM to target PHY
+ *
+ * Author: Sean Wang <sean.wang@mediatek.com>
+ *
+ */
+
+#include <linux/phy.h>
+#include <linux/regmap.h>
+
+#include "mtk_eth_soc.h"
+
+struct mtk_eth_muxc {
+ int (*set_path)(struct mtk_eth *eth, int path);
+};
+
+static const char * const mtk_eth_mux_name[] = {
+ "mux_gdm1_to_gmac1_esw", "mux_gmac2_gmac0_to_gephy",
+ "mux_u3_gmac2_to_qphy", "mux_gmac1_gmac2_to_sgmii_rgmii",
+ "mux_gmac12_to_gephy_sgmii",
+};
+
+static const char * const mtk_eth_path_name[] = {
+ "gmac1_rgmii", "gmac1_trgmii", "gmac1_sgmii", "gmac2_rgmii",
+ "gmac2_sgmii", "gmac2_gephy", "gdm1_esw",
+};
+
+static int set_mux_gdm1_to_gmac1_esw(struct mtk_eth *eth, int path)
+{
+ bool updated = true;
+ u32 val, mask, set;
+
+ switch (path) {
+ case MTK_ETH_PATH_GMAC1_SGMII:
+ mask = ~(u32)MTK_MUX_TO_ESW;
+ set = 0;
+ break;
+ case MTK_ETH_PATH_GDM1_ESW:
+ mask = ~(u32)MTK_MUX_TO_ESW;
+ set = MTK_MUX_TO_ESW;
+ break;
+ default:
+ updated = false;
+ break;
+ };
+
+ if (updated) {
+ val = mtk_r32(eth, MTK_MAC_MISC);
+ val = (val & mask) | set;
+ mtk_w32(eth, val, MTK_MAC_MISC);
+ }
+
+ dev_dbg(eth->dev, "path %s in %s updated = %d\n",
+ mtk_eth_path_name[path], __func__, updated);
+
+ return 0;
+}
+
+static int set_mux_gmac2_gmac0_to_gephy(struct mtk_eth *eth, int path)
+{
+ unsigned int val = 0;
+ bool updated = true;
+
+ switch (path) {
+ case MTK_ETH_PATH_GMAC2_GEPHY:
+ val = ~(u32)GEPHY_MAC_SEL;
+ break;
+ default:
+ updated = false;
+ break;
+ }
+
+ if (updated)
+ regmap_update_bits(eth->infra, INFRA_MISC2, GEPHY_MAC_SEL, val);
+
+ dev_dbg(eth->dev, "path %s in %s updated = %d\n",
+ mtk_eth_path_name[path], __func__, updated);
+
+ return 0;
+}
+
+static int set_mux_u3_gmac2_to_qphy(struct mtk_eth *eth, int path)
+{
+ unsigned int val = 0;
+ bool updated = true;
+
+ switch (path) {
+ case MTK_ETH_PATH_GMAC2_SGMII:
+ val = CO_QPHY_SEL;
+ break;
+ default:
+ updated = false;
+ break;
+ }
+
+ if (updated)
+ regmap_update_bits(eth->infra, INFRA_MISC2, CO_QPHY_SEL, val);
+
+ dev_dbg(eth->dev, "path %s in %s updated = %d\n",
+ mtk_eth_path_name[path], __func__, updated);
+
+ return 0;
+}
+
+static int set_mux_gmac1_gmac2_to_sgmii_rgmii(struct mtk_eth *eth, int path)
+{
+ unsigned int val = 0;
+ bool updated = true;
+
+ switch (path) {
+ case MTK_ETH_PATH_GMAC1_SGMII:
+ val = SYSCFG0_SGMII_GMAC1;
+ break;
+ case MTK_ETH_PATH_GMAC2_SGMII:
+ val = SYSCFG0_SGMII_GMAC2;
+ break;
+ case MTK_ETH_PATH_GMAC1_RGMII:
+ case MTK_ETH_PATH_GMAC2_RGMII:
+ regmap_read(eth->ethsys, ETHSYS_SYSCFG0, &val);
+ val &= SYSCFG0_SGMII_MASK;
+
+ if ((path == MTK_GMAC1_RGMII && val == SYSCFG0_SGMII_GMAC1) ||
+ (path == MTK_GMAC2_RGMII && val == SYSCFG0_SGMII_GMAC2))
+ val = 0;
+ else
+ updated = false;
+ break;
+ default:
+ updated = false;
+ break;
+ };
+
+ if (updated)
+ regmap_update_bits(eth->ethsys, ETHSYS_SYSCFG0,
+ SYSCFG0_SGMII_MASK, val);
+
+ dev_dbg(eth->dev, "path %s in %s updated = %d\n",
+ mtk_eth_path_name[path], __func__, updated);
+
+ return 0;
+}
+
+static int set_mux_gmac12_to_gephy_sgmii(struct mtk_eth *eth, int path)
+{
+ unsigned int val = 0;
+ bool updated = true;
+
+ regmap_read(eth->ethsys, ETHSYS_SYSCFG0, &val);
+
+ switch (path) {
+ case MTK_ETH_PATH_GMAC1_SGMII:
+ val |= SYSCFG0_SGMII_GMAC1_V2;
+ break;
+ case MTK_ETH_PATH_GMAC2_GEPHY:
+ val &= ~(u32)SYSCFG0_SGMII_GMAC2_V2;
+ break;
+ case MTK_ETH_PATH_GMAC2_SGMII:
+ val |= SYSCFG0_SGMII_GMAC2_V2;
+ break;
+ default:
+ updated = false;
+ };
+
+ if (updated)
+ regmap_update_bits(eth->ethsys, ETHSYS_SYSCFG0,
+ SYSCFG0_SGMII_MASK, val);
+
+ dev_dbg(eth->dev, "path %s in %s updated = %d\n",
+ mtk_eth_path_name[path], __func__, updated);
+
+ return 0;
+}
+
+static const struct mtk_eth_muxc mtk_eth_muxc[] = {
+ { .set_path = set_mux_gdm1_to_gmac1_esw, },
+ { .set_path = set_mux_gmac2_gmac0_to_gephy, },
+ { .set_path = set_mux_u3_gmac2_to_qphy, },
+ { .set_path = set_mux_gmac1_gmac2_to_sgmii_rgmii, },
+ { .set_path = set_mux_gmac12_to_gephy_sgmii, }
+};
+
+static int mtk_eth_mux_setup(struct mtk_eth *eth, int path)
+{
+ int i, err = 0;
+
+ if (!MTK_HAS_CAPS(eth->soc->caps, MTK_PATH_BIT(path))) {
+ dev_err(eth->dev, "path %s isn't support on the SoC\n",
+ mtk_eth_path_name[path]);
+ return -EINVAL;
+ }
+
+ if (!MTK_HAS_CAPS(eth->soc->caps, MTK_MUX))
+ return 0;
+
+ /* Setup MUX in path fabric */
+ for (i = 0; i < MTK_ETH_MUX_MAX; i++) {
+ if (MTK_HAS_CAPS(eth->soc->caps, MTK_MUX_BIT(i))) {
+ err = mtk_eth_muxc[i].set_path(eth, path);
+ if (err)
+ goto out;
+ } else {
+ dev_dbg(eth->dev, "mux %s isn't present on the SoC\n",
+ mtk_eth_mux_name[i]);
+ }
+ }
+
+out:
+ return err;
+}
+
+static int mtk_gmac_sgmii_path_setup(struct mtk_eth *eth, int mac_id)
+{
+ unsigned int val = 0;
+ int sid, err, path;
+
+ path = (mac_id == 0) ? MTK_ETH_PATH_GMAC1_SGMII :
+ MTK_ETH_PATH_GMAC2_SGMII;
+
+ /* Setup proper MUXes along the path */
+ err = mtk_eth_mux_setup(eth, path);
+ if (err)
+ return err;
+
+ /* The path GMAC to SGMII will be enabled once the SGMIISYS is being
+ * setup done.
+ */
+ regmap_read(eth->ethsys, ETHSYS_SYSCFG0, &val);
+
+ regmap_update_bits(eth->ethsys, ETHSYS_SYSCFG0,
+ SYSCFG0_SGMII_MASK, ~(u32)SYSCFG0_SGMII_MASK);
+
+ /* Decide how GMAC and SGMIISYS be mapped */
+ sid = (MTK_HAS_CAPS(eth->soc->caps, MTK_SHARED_SGMII)) ? 0 : mac_id;
+
+ /* Setup SGMIISYS with the determined property */
+ if (MTK_HAS_FLAGS(eth->sgmii->flags[sid], MTK_SGMII_PHYSPEED_AN))
+ err = mtk_sgmii_setup_mode_an(eth->sgmii, sid);
+ else
+ err = mtk_sgmii_setup_mode_force(eth->sgmii, sid);
+
+ if (err)
+ return err;
+
+ regmap_update_bits(eth->ethsys, ETHSYS_SYSCFG0,
+ SYSCFG0_SGMII_MASK, val);
+
+ return 0;
+}
+
+static int mtk_gmac_gephy_path_setup(struct mtk_eth *eth, int mac_id)
+{
+ int err, path = 0;
+
+ if (mac_id == 1)
+ path = MTK_ETH_PATH_GMAC2_GEPHY;
+
+ if (!path)
+ return -EINVAL;
+
+ /* Setup proper MUXes along the path */
+ err = mtk_eth_mux_setup(eth, path);
+ if (err)
+ return err;
+
+ return 0;
+}
+
+static int mtk_gmac_rgmii_path_setup(struct mtk_eth *eth, int mac_id)
+{
+ int err, path;
+
+ path = (mac_id == 0) ? MTK_ETH_PATH_GMAC1_RGMII :
+ MTK_ETH_PATH_GMAC2_RGMII;
+
+ /* Setup proper MUXes along the path */
+ err = mtk_eth_mux_setup(eth, path);
+ if (err)
+ return err;
+
+ return 0;
+}
+
+int mtk_setup_hw_path(struct mtk_eth *eth, int mac_id, int phymode)
+{
+ int err;
+
+ switch (phymode) {
+ case PHY_INTERFACE_MODE_TRGMII:
+ case PHY_INTERFACE_MODE_RGMII_TXID:
+ case PHY_INTERFACE_MODE_RGMII_RXID:
+ case PHY_INTERFACE_MODE_RGMII_ID:
+ case PHY_INTERFACE_MODE_RGMII:
+ case PHY_INTERFACE_MODE_MII:
+ case PHY_INTERFACE_MODE_REVMII:
+ case PHY_INTERFACE_MODE_RMII:
+ if (MTK_HAS_CAPS(eth->soc->caps, MTK_RGMII)) {
+ err = mtk_gmac_rgmii_path_setup(eth, mac_id);
+ if (err)
+ return err;
+ }
+ break;
+ case PHY_INTERFACE_MODE_SGMII:
+ if (MTK_HAS_CAPS(eth->soc->caps, MTK_SGMII)) {
+ err = mtk_gmac_sgmii_path_setup(eth, mac_id);
+ if (err)
+ return err;
+ }
+ break;
+ case PHY_INTERFACE_MODE_GMII:
+ if (MTK_HAS_CAPS(eth->soc->caps, MTK_GEPHY)) {
+ err = mtk_gmac_gephy_path_setup(eth, mac_id);
+ if (err)
+ return err;
+ }
+ break;
+ default:
+ break;
+ }
+
+ return 0;
+}