ath79: add support for kernel 5.4

Signed-off-by: David Bauer <mail@david-bauer.net>
[refreshed]
Signed-off-by: Koen Vandeputte <koen.vandeputte@ncentric.com>

* Sync the patches with the changes done for kernel 4.19
* Use KERNEL_TESTING_PATCHVER
* Refresh the configuration
* Fix multiple compile bugs in the patches
* Only add own ag71xx files for kernel 4.19 and use upstream version for
  5.4.

Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>

1 files changed, 135 insertions, 0 deletions

diff --git a/target/linux/ath79/files-4.19/drivers/net/ethernet/atheros/ag71xx/ag71xx_gmac.c b/target/linux/ath79/files-4.19/drivers/net/ethernet/atheros/ag71xx/ag71xx_gmac.c
new file mode 100644
index 0000000000..cc0a15d3a4
--- /dev/null
+++ b/target/linux/ath79/files-4.19/drivers/net/ethernet/atheros/ag71xx/ag71xx_gmac.c
@@ -0,0 +1,135 @@
+/*
+ *  Atheros AR71xx built-in ethernet mac driver
+ *
+ *  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.
+ */
+
+#include <linux/sizes.h>
+#include <linux/of_address.h>
+#include "ag71xx.h"
+
+static void ag71xx_of_set(struct device_node *np, const char *prop,
+			  u32 *reg, u32 shift, u32 mask)
+{
+	u32 val;
+
+	if (of_property_read_u32(np, prop, &val))
+		return;
+
+	*reg &= ~(mask << shift);
+	*reg |= ((val & mask) << shift);
+}
+
+static void ag71xx_of_bit(struct device_node *np, const char *prop,
+			  u32 *reg, u32 mask)
+{
+	u32 val;
+
+	if (of_property_read_u32(np, prop, &val))
+		return;
+
+	if (val)
+		*reg |= mask;
+	else
+		*reg &= ~mask;
+}
+
+static void ag71xx_setup_gmac_933x(struct device_node *np, void __iomem *base)
+{
+	u32 val = __raw_readl(base + AR933X_GMAC_REG_ETH_CFG);
+
+	ag71xx_of_bit(np, "switch-phy-swap", &val, AR933X_ETH_CFG_SW_PHY_SWAP);
+	ag71xx_of_bit(np, "switch-phy-addr-swap", &val,
+		AR933X_ETH_CFG_SW_PHY_ADDR_SWAP);
+
+	__raw_writel(val, base + AR933X_GMAC_REG_ETH_CFG);
+}
+
+static void ag71xx_setup_gmac_934x(struct device_node *np, void __iomem *base)
+{
+	u32 val = __raw_readl(base + AR934X_GMAC_REG_ETH_CFG);
+
+	ag71xx_of_bit(np, "rgmii-gmac0", &val, AR934X_ETH_CFG_RGMII_GMAC0);
+	ag71xx_of_bit(np, "mii-gmac0", &val, AR934X_ETH_CFG_MII_GMAC0);
+	ag71xx_of_bit(np, "mii-gmac0-slave", &val, AR934X_ETH_CFG_MII_GMAC0_SLAVE);
+	ag71xx_of_bit(np, "gmii-gmac0", &val, AR934X_ETH_CFG_GMII_GMAC0);
+	ag71xx_of_bit(np, "switch-phy-swap", &val, AR934X_ETH_CFG_SW_PHY_SWAP);
+	ag71xx_of_bit(np, "switch-only-mode", &val,
+		AR934X_ETH_CFG_SW_ONLY_MODE);
+	ag71xx_of_set(np, "rxdv-delay", &val,
+		      AR934X_ETH_CFG_RDV_DELAY_SHIFT, 0x3);
+	ag71xx_of_set(np, "rxd-delay", &val,
+		      AR934X_ETH_CFG_RXD_DELAY_SHIFT, 0x3);
+	ag71xx_of_set(np, "txd-delay", &val,
+		      AR934X_ETH_CFG_TXD_DELAY_SHIFT, 0x3);
+	ag71xx_of_set(np, "txen-delay", &val,
+		      AR934X_ETH_CFG_TXE_DELAY_SHIFT, 0x3);
+
+	__raw_writel(val, base + AR934X_GMAC_REG_ETH_CFG);
+}
+
+static void ag71xx_setup_gmac_955x(struct device_node *np, void __iomem *base)
+{
+	u32 val = __raw_readl(base + QCA955X_GMAC_REG_ETH_CFG);
+
+	ag71xx_of_bit(np, "rgmii-enabled", &val, QCA955X_ETH_CFG_RGMII_EN);
+	ag71xx_of_bit(np, "ge0-sgmii", &val, QCA955X_ETH_CFG_GE0_SGMII);
+	ag71xx_of_set(np, "txen-delay", &val, QCA955X_ETH_CFG_TXE_DELAY_SHIFT, 0x3);
+	ag71xx_of_set(np, "txd-delay", &val, QCA955X_ETH_CFG_TXD_DELAY_SHIFT, 0x3);
+	ag71xx_of_set(np, "rxdv-delay", &val, QCA955X_ETH_CFG_RDV_DELAY_SHIFT, 0x3);
+	ag71xx_of_set(np, "rxd-delay", &val, QCA955X_ETH_CFG_RXD_DELAY_SHIFT, 0x3);
+
+	__raw_writel(val, base + QCA955X_GMAC_REG_ETH_CFG);
+}
+
+static void ag71xx_setup_gmac_956x(struct device_node *np, void __iomem *base)
+{
+	u32 val = __raw_readl(base + QCA956X_GMAC_REG_ETH_CFG);
+
+	ag71xx_of_bit(np, "switch-phy-swap", &val, QCA956X_ETH_CFG_SW_PHY_SWAP);
+	ag71xx_of_bit(np, "switch-phy-addr-swap", &val,
+		QCA956X_ETH_CFG_SW_PHY_ADDR_SWAP);
+
+	__raw_writel(val, base + QCA956X_GMAC_REG_ETH_CFG);
+}
+
+int ag71xx_setup_gmac(struct device_node *np)
+{
+	struct device_node *np_dev;
+	void __iomem *base;
+	int err = 0;
+
+	np = of_get_child_by_name(np, "gmac-config");
+	if (!np)
+		return 0;
+
+	np_dev = of_parse_phandle(np, "device", 0);
+	if (!np_dev)
+		goto out;
+
+	base = of_iomap(np_dev, 0);
+	if (!base) {
+		pr_err("%pOF: can't map GMAC registers\n", np_dev);
+		err = -ENOMEM;
+		goto err_iomap;
+	}
+
+	if (of_device_is_compatible(np_dev, "qca,ar9330-gmac"))
+		ag71xx_setup_gmac_933x(np, base);
+	else if (of_device_is_compatible(np_dev, "qca,ar9340-gmac"))
+		ag71xx_setup_gmac_934x(np, base);
+	else if (of_device_is_compatible(np_dev, "qca,qca9550-gmac"))
+		ag71xx_setup_gmac_955x(np, base);
+	else if (of_device_is_compatible(np_dev, "qca,qca9560-gmac"))
+		ag71xx_setup_gmac_956x(np, base);
+
+	iounmap(base);
+
+err_iomap:
+	of_node_put(np_dev);
+out:
+	of_node_put(np);
+	return err;
+}