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path: root/target/linux/ramips/files-4.14/drivers/net/ethernet/mtk/gsw_mt7620.c
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Diffstat (limited to 'target/linux/ramips/files-4.14/drivers/net/ethernet/mtk/gsw_mt7620.c')
-rw-r--r--target/linux/ramips/files-4.14/drivers/net/ethernet/mtk/gsw_mt7620.c259
1 files changed, 259 insertions, 0 deletions
diff --git a/target/linux/ramips/files-4.14/drivers/net/ethernet/mtk/gsw_mt7620.c b/target/linux/ramips/files-4.14/drivers/net/ethernet/mtk/gsw_mt7620.c
new file mode 100644
index 0000000000..b675ad0c4a
--- /dev/null
+++ b/target/linux/ramips/files-4.14/drivers/net/ethernet/mtk/gsw_mt7620.c
@@ -0,0 +1,259 @@
+/* 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
+ * the Free Software Foundation; version 2 of the License
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * Copyright (C) 2009-2015 John Crispin <blogic@openwrt.org>
+ * Copyright (C) 2009-2015 Felix Fietkau <nbd@nbd.name>
+ * Copyright (C) 2013-2015 Michael Lee <igvtee@gmail.com>
+ */
+
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/types.h>
+#include <linux/platform_device.h>
+#include <linux/of_device.h>
+#include <linux/of_irq.h>
+
+#include <ralink_regs.h>
+
+#include "mtk_eth_soc.h"
+#include "gsw_mt7620.h"
+
+void mtk_switch_w32(struct mt7620_gsw *gsw, u32 val, unsigned reg)
+{
+ iowrite32(val, gsw->base + reg);
+}
+
+u32 mtk_switch_r32(struct mt7620_gsw *gsw, unsigned reg)
+{
+ return ioread32(gsw->base + reg);
+}
+
+static irqreturn_t gsw_interrupt_mt7620(int irq, void *_priv)
+{
+ struct fe_priv *priv = (struct fe_priv *)_priv;
+ struct mt7620_gsw *gsw = (struct mt7620_gsw *)priv->soc->swpriv;
+ u32 status;
+ int i, max = (gsw->port4 == PORT4_EPHY) ? (4) : (3);
+
+ status = mtk_switch_r32(gsw, GSW_REG_ISR);
+ if (status & PORT_IRQ_ST_CHG)
+ for (i = 0; i <= max; i++) {
+ u32 status = mtk_switch_r32(gsw, GSW_REG_PORT_STATUS(i));
+ int link = status & 0x1;
+
+ if (link != priv->link[i])
+ mt7620_print_link_state(priv, i, link,
+ (status >> 2) & 3,
+ (status & 0x2));
+
+ priv->link[i] = link;
+ }
+ mt7620_handle_carrier(priv);
+ mtk_switch_w32(gsw, status, GSW_REG_ISR);
+
+ return IRQ_HANDLED;
+}
+
+static void mt7620_hw_init(struct mt7620_gsw *gsw, struct device_node *np)
+{
+ u32 is_BGA = (rt_sysc_r32(0x0c) >> 16) & 1;
+
+ rt_sysc_w32(rt_sysc_r32(SYSC_REG_CFG1) | BIT(8), SYSC_REG_CFG1);
+ mtk_switch_w32(gsw, mtk_switch_r32(gsw, GSW_REG_CKGCR) & ~(0x3 << 4), GSW_REG_CKGCR);
+
+ /* Enable MIB stats */
+ mtk_switch_w32(gsw, mtk_switch_r32(gsw, GSW_REG_MIB_CNT_EN) | (1 << 1), GSW_REG_MIB_CNT_EN);
+
+ if (of_property_read_bool(np, "mediatek,mt7530")) {
+ u32 val;
+
+ /* turn off ephy and set phy base addr to 12 */
+ mtk_switch_w32(gsw, mtk_switch_r32(gsw, GSW_REG_GPC1) |
+ (0x1f << 24) | (0xc << 16),
+ GSW_REG_GPC1);
+
+ /* set MT7530 central align */
+ val = mt7530_mdio_r32(gsw, 0x7830);
+ val &= ~BIT(0);
+ val |= BIT(1);
+ mt7530_mdio_w32(gsw, 0x7830, val);
+
+ val = mt7530_mdio_r32(gsw, 0x7a40);
+ val &= ~BIT(30);
+ mt7530_mdio_w32(gsw, 0x7a40, val);
+
+ mt7530_mdio_w32(gsw, 0x7a78, 0x855);
+ } else {
+ /* global page 4 */
+ _mt7620_mii_write(gsw, 1, 31, 0x4000);
+
+ _mt7620_mii_write(gsw, 1, 17, 0x7444);
+ if (is_BGA)
+ _mt7620_mii_write(gsw, 1, 19, 0x0114);
+ else
+ _mt7620_mii_write(gsw, 1, 19, 0x0117);
+
+ _mt7620_mii_write(gsw, 1, 22, 0x10cf);
+ _mt7620_mii_write(gsw, 1, 25, 0x6212);
+ _mt7620_mii_write(gsw, 1, 26, 0x0777);
+ _mt7620_mii_write(gsw, 1, 29, 0x4000);
+ _mt7620_mii_write(gsw, 1, 28, 0xc077);
+ _mt7620_mii_write(gsw, 1, 24, 0x0000);
+
+ /* global page 3 */
+ _mt7620_mii_write(gsw, 1, 31, 0x3000);
+ _mt7620_mii_write(gsw, 1, 17, 0x4838);
+
+ /* global page 2 */
+ _mt7620_mii_write(gsw, 1, 31, 0x2000);
+ if (is_BGA) {
+ _mt7620_mii_write(gsw, 1, 21, 0x0515);
+ _mt7620_mii_write(gsw, 1, 22, 0x0053);
+ _mt7620_mii_write(gsw, 1, 23, 0x00bf);
+ _mt7620_mii_write(gsw, 1, 24, 0x0aaf);
+ _mt7620_mii_write(gsw, 1, 25, 0x0fad);
+ _mt7620_mii_write(gsw, 1, 26, 0x0fc1);
+ } else {
+ _mt7620_mii_write(gsw, 1, 21, 0x0517);
+ _mt7620_mii_write(gsw, 1, 22, 0x0fd2);
+ _mt7620_mii_write(gsw, 1, 23, 0x00bf);
+ _mt7620_mii_write(gsw, 1, 24, 0x0aab);
+ _mt7620_mii_write(gsw, 1, 25, 0x00ae);
+ _mt7620_mii_write(gsw, 1, 26, 0x0fff);
+ }
+ /* global page 1 */
+ _mt7620_mii_write(gsw, 1, 31, 0x1000);
+ _mt7620_mii_write(gsw, 1, 17, 0xe7f8);
+ }
+
+ /* global page 0 */
+ _mt7620_mii_write(gsw, 1, 31, 0x8000);
+ _mt7620_mii_write(gsw, 0, 30, 0xa000);
+ _mt7620_mii_write(gsw, 1, 30, 0xa000);
+ _mt7620_mii_write(gsw, 2, 30, 0xa000);
+ _mt7620_mii_write(gsw, 3, 30, 0xa000);
+
+ _mt7620_mii_write(gsw, 0, 4, 0x05e1);
+ _mt7620_mii_write(gsw, 1, 4, 0x05e1);
+ _mt7620_mii_write(gsw, 2, 4, 0x05e1);
+ _mt7620_mii_write(gsw, 3, 4, 0x05e1);
+
+ /* global page 2 */
+ _mt7620_mii_write(gsw, 1, 31, 0xa000);
+ _mt7620_mii_write(gsw, 0, 16, 0x1111);
+ _mt7620_mii_write(gsw, 1, 16, 0x1010);
+ _mt7620_mii_write(gsw, 2, 16, 0x1515);
+ _mt7620_mii_write(gsw, 3, 16, 0x0f0f);
+
+ /* CPU Port6 Force Link 1G, FC ON */
+ mtk_switch_w32(gsw, 0x5e33b, GSW_REG_PORT_PMCR(6));
+
+ /* Set Port 6 as CPU Port */
+ mtk_switch_w32(gsw, 0x7f7f7fe0, 0x0010);
+
+ /* setup port 4 */
+ if (gsw->port4 == PORT4_EPHY) {
+ u32 val = rt_sysc_r32(SYSC_REG_CFG1);
+
+ val |= 3 << 14;
+ rt_sysc_w32(val, SYSC_REG_CFG1);
+ _mt7620_mii_write(gsw, 4, 30, 0xa000);
+ _mt7620_mii_write(gsw, 4, 4, 0x05e1);
+ _mt7620_mii_write(gsw, 4, 16, 0x1313);
+ pr_info("gsw: setting port4 to ephy mode\n");
+ }
+}
+
+static const struct of_device_id mediatek_gsw_match[] = {
+ { .compatible = "mediatek,mt7620-gsw" },
+ {},
+};
+MODULE_DEVICE_TABLE(of, mediatek_gsw_match);
+
+int mtk_gsw_init(struct fe_priv *priv)
+{
+ struct device_node *np = priv->switch_np;
+ struct platform_device *pdev = of_find_device_by_node(np);
+ struct mt7620_gsw *gsw;
+
+ if (!pdev)
+ return -ENODEV;
+
+ if (!of_device_is_compatible(np, mediatek_gsw_match->compatible))
+ return -EINVAL;
+
+ gsw = platform_get_drvdata(pdev);
+ priv->soc->swpriv = gsw;
+
+ mt7620_hw_init(gsw, np);
+
+ if (gsw->irq) {
+ request_irq(gsw->irq, gsw_interrupt_mt7620, 0,
+ "gsw", priv);
+ mtk_switch_w32(gsw, ~PORT_IRQ_ST_CHG, GSW_REG_IMR);
+ }
+
+ return 0;
+}
+
+static int mt7620_gsw_probe(struct platform_device *pdev)
+{
+ struct resource *res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ const char *port4 = NULL;
+ struct mt7620_gsw *gsw;
+ struct device_node *np = pdev->dev.of_node;
+
+ gsw = devm_kzalloc(&pdev->dev, sizeof(struct mt7620_gsw), GFP_KERNEL);
+ if (!gsw)
+ return -ENOMEM;
+
+ gsw->base = devm_ioremap_resource(&pdev->dev, res);
+ if (!gsw->base)
+ return -EADDRNOTAVAIL;
+
+ gsw->dev = &pdev->dev;
+
+ of_property_read_string(np, "mediatek,port4", &port4);
+ if (port4 && !strcmp(port4, "ephy"))
+ gsw->port4 = PORT4_EPHY;
+ else if (port4 && !strcmp(port4, "gmac"))
+ gsw->port4 = PORT4_EXT;
+ else
+ gsw->port4 = PORT4_EPHY;
+
+ gsw->irq = platform_get_irq(pdev, 0);
+
+ platform_set_drvdata(pdev, gsw);
+
+ return 0;
+}
+
+static int mt7620_gsw_remove(struct platform_device *pdev)
+{
+ platform_set_drvdata(pdev, NULL);
+
+ return 0;
+}
+
+static struct platform_driver gsw_driver = {
+ .probe = mt7620_gsw_probe,
+ .remove = mt7620_gsw_remove,
+ .driver = {
+ .name = "mt7620-gsw",
+ .owner = THIS_MODULE,
+ .of_match_table = mediatek_gsw_match,
+ },
+};
+
+module_platform_driver(gsw_driver);
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("John Crispin <blogic@openwrt.org>");
+MODULE_DESCRIPTION("GBit switch driver for Mediatek MT7620 SoC");
+MODULE_VERSION(MTK_FE_DRV_VERSION);
generated by cgit v1.2.3 (git 2.25.1) at 2024-06-27 21:31:39 +0000