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-rw-r--r--drivers/net/ethernet/stmicro/stmmac/dwmac-sti.c374
1 files changed, 205 insertions, 169 deletions
diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac-sti.c b/drivers/net/ethernet/stmicro/stmmac/dwmac-sti.c
index 552bbc17863..ccfe7e51041 100644
--- a/drivers/net/ethernet/stmicro/stmmac/dwmac-sti.c
+++ b/drivers/net/ethernet/stmicro/stmmac/dwmac-sti.c
@@ -3,7 +3,7 @@
*
* Copyright (C) 2003-2014 STMicroelectronics (R&D) Limited
* Author: Srinivas Kandagatla <srinivas.kandagatla@st.com>
- *
+ * Contributors: Giuseppe Cavallaro <peppe.cavallaro@st.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
@@ -22,45 +22,22 @@
#include <linux/of.h>
#include <linux/of_net.h>
+#define DWMAC_125MHZ 125000000
+#define DWMAC_50MHZ 50000000
+#define DWMAC_25MHZ 25000000
+#define DWMAC_2_5MHZ 2500000
+
+#define IS_PHY_IF_MODE_RGMII(iface) (iface == PHY_INTERFACE_MODE_RGMII || \
+ iface == PHY_INTERFACE_MODE_RGMII_ID || \
+ iface == PHY_INTERFACE_MODE_RGMII_RXID || \
+ iface == PHY_INTERFACE_MODE_RGMII_TXID)
+
+#define IS_PHY_IF_MODE_GBIT(iface) (IS_PHY_IF_MODE_RGMII(iface) || \
+ iface == PHY_INTERFACE_MODE_GMII)
+
+/* STiH4xx register definitions (STiH415/STiH416/STiH407/STiH410 families) */
+
/**
- * STi GMAC glue logic.
- * --------------------
- *
- * _
- * | \
- * --------|0 \ ETH_SEL_INTERNAL_NOTEXT_PHYCLK
- * phyclk | |___________________________________________
- * | | | (phyclk-in)
- * --------|1 / |
- * int-clk |_ / |
- * | _
- * | | \
- * |_______|1 \ ETH_SEL_TX_RETIME_CLK
- * | |___________________________
- * | | (tx-retime-clk)
- * _______|0 /
- * | |_ /
- * _ |
- * | \ |
- * --------|0 \ |
- * clk_125 | |__|
- * | | ETH_SEL_TXCLK_NOT_CLK125
- * --------|1 /
- * txclk |_ /
- *
- *
- * ETH_SEL_INTERNAL_NOTEXT_PHYCLK is valid only for RMII where PHY can
- * generate 50MHz clock or MAC can generate it.
- * This bit is configured by "st,ext-phyclk" property.
- *
- * ETH_SEL_TXCLK_NOT_CLK125 is only valid for gigabit modes, where the 125Mhz
- * clock either comes from clk-125 pin or txclk pin. This configuration is
- * totally driven by the board wiring. This bit is configured by
- * "st,tx-retime-src" property.
- *
- * TXCLK configuration is different for different phy interface modes
- * and changes according to link speed in modes like RGMII.
- *
* Below table summarizes the clock requirement and clock sources for
* supported phy interface modes with link speeds.
* ________________________________________________
@@ -74,44 +51,58 @@
* ------------------------------------------------
*| RGMII | 125Mhz | 25Mhz |
*| | clk-125/txclk | clkgen |
+ *| | clkgen | |
* ------------------------------------------------
*| RMII | n/a | 25Mhz |
*| | |clkgen/phyclk-in |
* ------------------------------------------------
*
- * TX lines are always retimed with a clk, which can vary depending
- * on the board configuration. Below is the table of these bits
- * in eth configuration register depending on source of retime clk.
- *
- *---------------------------------------------------------------
- * src | tx_rt_clk | int_not_ext_phyclk | txclk_n_clk125|
- *---------------------------------------------------------------
- * txclk | 0 | n/a | 1 |
- *---------------------------------------------------------------
- * ck_125| 0 | n/a | 0 |
- *---------------------------------------------------------------
- * phyclk| 1 | 0 | n/a |
- *---------------------------------------------------------------
- * clkgen| 1 | 1 | n/a |
- *---------------------------------------------------------------
+ * Register Configuration
+ *-------------------------------
+ * src |BIT(8)| BIT(7)| BIT(6)|
+ *-------------------------------
+ * txclk | 0 | n/a | 1 |
+ *-------------------------------
+ * ck_125| 0 | n/a | 0 |
+ *-------------------------------
+ * phyclk| 1 | 0 | n/a |
+ *-------------------------------
+ * clkgen| 1 | 1 | n/a |
+ *-------------------------------
*/
- /* Register definition */
+#define STIH4XX_RETIME_SRC_MASK GENMASK(8, 6)
+#define STIH4XX_ETH_SEL_TX_RETIME_CLK BIT(8)
+#define STIH4XX_ETH_SEL_INTERNAL_NOTEXT_PHYCLK BIT(7)
+#define STIH4XX_ETH_SEL_TXCLK_NOT_CLK125 BIT(6)
+
+/* STiD127 register definitions */
- /* 3 bits [8:6]
- * [6:6] ETH_SEL_TXCLK_NOT_CLK125
- * [7:7] ETH_SEL_INTERNAL_NOTEXT_PHYCLK
- * [8:8] ETH_SEL_TX_RETIME_CLK
- *
- */
+/**
+ *-----------------------
+ * src |BIT(6)| BIT(7)|
+ *-----------------------
+ * MII | 1 | n/a |
+ *-----------------------
+ * RMII | n/a | 1 |
+ * clkgen| | |
+ *-----------------------
+ * RMII | n/a | 0 |
+ * phyclk| | |
+ *-----------------------
+ * RGMII | 1 | n/a |
+ * clkgen| | |
+ *-----------------------
+ */
-#define TX_RETIME_SRC_MASK GENMASK(8, 6)
-#define ETH_SEL_TX_RETIME_CLK BIT(8)
-#define ETH_SEL_INTERNAL_NOTEXT_PHYCLK BIT(7)
-#define ETH_SEL_TXCLK_NOT_CLK125 BIT(6)
+#define STID127_RETIME_SRC_MASK GENMASK(7, 6)
+#define STID127_ETH_SEL_INTERNAL_NOTEXT_PHYCLK BIT(7)
+#define STID127_ETH_SEL_INTERNAL_NOTEXT_TXCLK BIT(6)
-#define ENMII_MASK GENMASK(5, 5)
-#define ENMII BIT(5)
+#define ENMII_MASK GENMASK(5, 5)
+#define ENMII BIT(5)
+#define EN_MASK GENMASK(1, 1)
+#define EN BIT(1)
/**
* 3 bits [4:2]
@@ -120,29 +111,23 @@
* 010-SGMII
* 100-RMII
*/
-#define MII_PHY_SEL_MASK GENMASK(4, 2)
-#define ETH_PHY_SEL_RMII BIT(4)
-#define ETH_PHY_SEL_SGMII BIT(3)
-#define ETH_PHY_SEL_RGMII BIT(2)
-#define ETH_PHY_SEL_GMII 0x0
-#define ETH_PHY_SEL_MII 0x0
-
-#define IS_PHY_IF_MODE_RGMII(iface) (iface == PHY_INTERFACE_MODE_RGMII || \
- iface == PHY_INTERFACE_MODE_RGMII_ID || \
- iface == PHY_INTERFACE_MODE_RGMII_RXID || \
- iface == PHY_INTERFACE_MODE_RGMII_TXID)
-
-#define IS_PHY_IF_MODE_GBIT(iface) (IS_PHY_IF_MODE_RGMII(iface) || \
- iface == PHY_INTERFACE_MODE_GMII)
+#define MII_PHY_SEL_MASK GENMASK(4, 2)
+#define ETH_PHY_SEL_RMII BIT(4)
+#define ETH_PHY_SEL_SGMII BIT(3)
+#define ETH_PHY_SEL_RGMII BIT(2)
+#define ETH_PHY_SEL_GMII 0x0
+#define ETH_PHY_SEL_MII 0x0
struct sti_dwmac {
- int interface;
- bool ext_phyclk;
- bool is_tx_retime_src_clk_125;
- struct clk *clk;
- int reg;
+ int interface; /* MII interface */
+ bool ext_phyclk; /* Clock from external PHY */
+ u32 tx_retime_src; /* TXCLK Retiming*/
+ struct clk *clk; /* PHY clock */
+ int ctrl_reg; /* GMAC glue-logic control register */
+ int clk_sel_reg; /* GMAC ext clk selection register */
struct device *dev;
struct regmap *regmap;
+ u32 speed;
};
static u32 phy_intf_sels[] = {
@@ -162,74 +147,133 @@ enum {
TX_RETIME_SRC_CLKGEN,
};
-static const char *const tx_retime_srcs[] = {
- [TX_RETIME_SRC_NA] = "",
- [TX_RETIME_SRC_TXCLK] = "txclk",
- [TX_RETIME_SRC_CLK_125] = "clk_125",
- [TX_RETIME_SRC_PHYCLK] = "phyclk",
- [TX_RETIME_SRC_CLKGEN] = "clkgen",
-};
-
-static u32 tx_retime_val[] = {
- [TX_RETIME_SRC_TXCLK] = ETH_SEL_TXCLK_NOT_CLK125,
+static u32 stih4xx_tx_retime_val[] = {
+ [TX_RETIME_SRC_TXCLK] = STIH4XX_ETH_SEL_TXCLK_NOT_CLK125,
[TX_RETIME_SRC_CLK_125] = 0x0,
- [TX_RETIME_SRC_PHYCLK] = ETH_SEL_TX_RETIME_CLK,
- [TX_RETIME_SRC_CLKGEN] = ETH_SEL_TX_RETIME_CLK |
- ETH_SEL_INTERNAL_NOTEXT_PHYCLK,
+ [TX_RETIME_SRC_PHYCLK] = STIH4XX_ETH_SEL_TX_RETIME_CLK,
+ [TX_RETIME_SRC_CLKGEN] = STIH4XX_ETH_SEL_TX_RETIME_CLK
+ | STIH4XX_ETH_SEL_INTERNAL_NOTEXT_PHYCLK,
};
-static void setup_retime_src(struct sti_dwmac *dwmac, u32 spd)
+static void stih4xx_fix_retime_src(void *priv, u32 spd)
{
- u32 src = 0, freq = 0;
-
- if (spd == SPEED_100) {
- if (dwmac->interface == PHY_INTERFACE_MODE_MII ||
- dwmac->interface == PHY_INTERFACE_MODE_GMII) {
- src = TX_RETIME_SRC_TXCLK;
- } else if (dwmac->interface == PHY_INTERFACE_MODE_RMII) {
- if (dwmac->ext_phyclk) {
- src = TX_RETIME_SRC_PHYCLK;
- } else {
- src = TX_RETIME_SRC_CLKGEN;
- freq = 50000000;
- }
-
- } else if (IS_PHY_IF_MODE_RGMII(dwmac->interface)) {
+ struct sti_dwmac *dwmac = priv;
+ u32 src = dwmac->tx_retime_src;
+ u32 reg = dwmac->ctrl_reg;
+ u32 freq = 0;
+
+ if (dwmac->interface == PHY_INTERFACE_MODE_MII) {
+ src = TX_RETIME_SRC_TXCLK;
+ } else if (dwmac->interface == PHY_INTERFACE_MODE_RMII) {
+ if (dwmac->ext_phyclk) {
+ src = TX_RETIME_SRC_PHYCLK;
+ } else {
src = TX_RETIME_SRC_CLKGEN;
- freq = 25000000;
+ freq = DWMAC_50MHZ;
}
+ } else if (IS_PHY_IF_MODE_RGMII(dwmac->interface)) {
+ /* On GiGa clk source can be either ext or from clkgen */
+ if (spd == SPEED_1000) {
+ freq = DWMAC_125MHZ;
+ } else {
+ /* Switch to clkgen for these speeds */
+ src = TX_RETIME_SRC_CLKGEN;
+ if (spd == SPEED_100)
+ freq = DWMAC_25MHZ;
+ else if (spd == SPEED_10)
+ freq = DWMAC_2_5MHZ;
+ }
+ }
- if (src == TX_RETIME_SRC_CLKGEN && dwmac->clk)
- clk_set_rate(dwmac->clk, freq);
+ if (src == TX_RETIME_SRC_CLKGEN && dwmac->clk && freq)
+ clk_set_rate(dwmac->clk, freq);
- } else if (spd == SPEED_1000) {
- if (dwmac->is_tx_retime_src_clk_125)
- src = TX_RETIME_SRC_CLK_125;
- else
- src = TX_RETIME_SRC_TXCLK;
+ regmap_update_bits(dwmac->regmap, reg, STIH4XX_RETIME_SRC_MASK,
+ stih4xx_tx_retime_val[src]);
+}
+
+static void stid127_fix_retime_src(void *priv, u32 spd)
+{
+ struct sti_dwmac *dwmac = priv;
+ u32 reg = dwmac->ctrl_reg;
+ u32 freq = 0;
+ u32 val = 0;
+
+ if (dwmac->interface == PHY_INTERFACE_MODE_MII) {
+ val = STID127_ETH_SEL_INTERNAL_NOTEXT_TXCLK;
+ } else if (dwmac->interface == PHY_INTERFACE_MODE_RMII) {
+ if (!dwmac->ext_phyclk) {
+ val = STID127_ETH_SEL_INTERNAL_NOTEXT_PHYCLK;
+ freq = DWMAC_50MHZ;
+ }
+ } else if (IS_PHY_IF_MODE_RGMII(dwmac->interface)) {
+ val = STID127_ETH_SEL_INTERNAL_NOTEXT_TXCLK;
+ if (spd == SPEED_1000)
+ freq = DWMAC_125MHZ;
+ else if (spd == SPEED_100)
+ freq = DWMAC_25MHZ;
+ else if (spd == SPEED_10)
+ freq = DWMAC_2_5MHZ;
}
- regmap_update_bits(dwmac->regmap, dwmac->reg,
- TX_RETIME_SRC_MASK, tx_retime_val[src]);
+ if (dwmac->clk && freq)
+ clk_set_rate(dwmac->clk, freq);
+
+ regmap_update_bits(dwmac->regmap, reg, STID127_RETIME_SRC_MASK, val);
}
-static void sti_dwmac_exit(struct platform_device *pdev, void *priv)
+static void sti_dwmac_ctrl_init(struct sti_dwmac *dwmac)
{
- struct sti_dwmac *dwmac = priv;
+ struct regmap *regmap = dwmac->regmap;
+ int iface = dwmac->interface;
+ struct device *dev = dwmac->dev;
+ struct device_node *np = dev->of_node;
+ u32 reg = dwmac->ctrl_reg;
+ u32 val;
if (dwmac->clk)
- clk_disable_unprepare(dwmac->clk);
+ clk_prepare_enable(dwmac->clk);
+
+ if (of_property_read_bool(np, "st,gmac_en"))
+ regmap_update_bits(regmap, reg, EN_MASK, EN);
+
+ regmap_update_bits(regmap, reg, MII_PHY_SEL_MASK, phy_intf_sels[iface]);
+
+ val = (iface == PHY_INTERFACE_MODE_REVMII) ? 0 : ENMII;
+ regmap_update_bits(regmap, reg, ENMII_MASK, val);
+}
+
+static int stix4xx_init(struct platform_device *pdev, void *priv)
+{
+ struct sti_dwmac *dwmac = priv;
+ u32 spd = dwmac->speed;
+
+ sti_dwmac_ctrl_init(dwmac);
+
+ stih4xx_fix_retime_src(priv, spd);
+
+ return 0;
}
-static void sti_fix_mac_speed(void *priv, unsigned int spd)
+static int stid127_init(struct platform_device *pdev, void *priv)
{
struct sti_dwmac *dwmac = priv;
+ u32 spd = dwmac->speed;
- setup_retime_src(dwmac, spd);
+ sti_dwmac_ctrl_init(dwmac);
- return;
+ stid127_fix_retime_src(priv, spd);
+
+ return 0;
}
+static void sti_dwmac_exit(struct platform_device *pdev, void *priv)
+{
+ struct sti_dwmac *dwmac = priv;
+
+ if (dwmac->clk)
+ clk_disable_unprepare(dwmac->clk);
+}
static int sti_dwmac_parse_data(struct sti_dwmac *dwmac,
struct platform_device *pdev)
{
@@ -245,6 +289,13 @@ static int sti_dwmac_parse_data(struct sti_dwmac *dwmac,
res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "sti-ethconf");
if (!res)
return -ENODATA;
+ dwmac->ctrl_reg = res->start;
+
+ /* clk selection from extra syscfg register */
+ dwmac->clk_sel_reg = -ENXIO;
+ res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "sti-clkconf");
+ if (res)
+ dwmac->clk_sel_reg = res->start;
regmap = syscon_regmap_lookup_by_phandle(np, "st,syscon");
if (IS_ERR(regmap))
@@ -253,53 +304,31 @@ static int sti_dwmac_parse_data(struct sti_dwmac *dwmac,
dwmac->dev = dev;
dwmac->interface = of_get_phy_mode(np);
dwmac->regmap = regmap;
- dwmac->reg = res->start;
dwmac->ext_phyclk = of_property_read_bool(np, "st,ext-phyclk");
- dwmac->is_tx_retime_src_clk_125 = false;
+ dwmac->tx_retime_src = TX_RETIME_SRC_NA;
+ dwmac->speed = SPEED_100;
if (IS_PHY_IF_MODE_GBIT(dwmac->interface)) {
const char *rs;
+ dwmac->tx_retime_src = TX_RETIME_SRC_CLKGEN;
err = of_property_read_string(np, "st,tx-retime-src", &rs);
- if (err < 0) {
- dev_err(dev, "st,tx-retime-src not specified\n");
- return err;
- }
+ if (err < 0)
+ dev_warn(dev, "Use internal clock source\n");
if (!strcasecmp(rs, "clk_125"))
- dwmac->is_tx_retime_src_clk_125 = true;
+ dwmac->tx_retime_src = TX_RETIME_SRC_CLK_125;
+ else if (!strcasecmp(rs, "txclk"))
+ dwmac->tx_retime_src = TX_RETIME_SRC_TXCLK;
+
+ dwmac->speed = SPEED_1000;
}
dwmac->clk = devm_clk_get(dev, "sti-ethclk");
-
- if (IS_ERR(dwmac->clk))
+ if (IS_ERR(dwmac->clk)) {
+ dev_warn(dev, "No phy clock provided...\n");
dwmac->clk = NULL;
-
- return 0;
-}
-
-static int sti_dwmac_init(struct platform_device *pdev, void *priv)
-{
- struct sti_dwmac *dwmac = priv;
- struct regmap *regmap = dwmac->regmap;
- int iface = dwmac->interface;
- u32 reg = dwmac->reg;
- u32 val, spd;
-
- if (dwmac->clk)
- clk_prepare_enable(dwmac->clk);
-
- regmap_update_bits(regmap, reg, MII_PHY_SEL_MASK, phy_intf_sels[iface]);
-
- val = (iface == PHY_INTERFACE_MODE_REVMII) ? 0 : ENMII;
- regmap_update_bits(regmap, reg, ENMII_MASK, val);
-
- if (IS_PHY_IF_MODE_GBIT(iface))
- spd = SPEED_1000;
- else
- spd = SPEED_100;
-
- setup_retime_src(dwmac, spd);
+ }
return 0;
}
@@ -322,9 +351,16 @@ static void *sti_dwmac_setup(struct platform_device *pdev)
return dwmac;
}
-const struct stmmac_of_data sti_gmac_data = {
- .fix_mac_speed = sti_fix_mac_speed,
+const struct stmmac_of_data stih4xx_dwmac_data = {
+ .fix_mac_speed = stih4xx_fix_retime_src,
+ .setup = sti_dwmac_setup,
+ .init = stix4xx_init,
+ .exit = sti_dwmac_exit,
+};
+
+const struct stmmac_of_data stid127_dwmac_data = {
+ .fix_mac_speed = stid127_fix_retime_src,
.setup = sti_dwmac_setup,
- .init = sti_dwmac_init,
+ .init = stid127_init,
.exit = sti_dwmac_exit,
};
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2024-11-30 05:37:02 +0000