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-rw-r--r--drivers/soc/lantiq/Makefile1
-rw-r--r--drivers/soc/lantiq/gphy.c260
2 files changed, 261 insertions, 0 deletions
diff --git a/drivers/soc/lantiq/Makefile b/drivers/soc/lantiq/Makefile
index 35aa86bd1023..be9e866d53e5 100644
--- a/drivers/soc/lantiq/Makefile
+++ b/drivers/soc/lantiq/Makefile
@@ -1 +1,2 @@
obj-y += fpi-bus.o
+obj-$(CONFIG_XRX200_PHY_FW) += gphy.o
diff --git a/drivers/soc/lantiq/gphy.c b/drivers/soc/lantiq/gphy.c
new file mode 100644
index 000000000000..8d8659463b3e
--- /dev/null
+++ b/drivers/soc/lantiq/gphy.c
@@ -0,0 +1,260 @@
+/*
+ * 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.
+ *
+ * Copyright (C) 2012 John Crispin <blogic@phrozen.org>
+ * Copyright (C) 2016 Martin Blumenstingl <martin.blumenstingl@googlemail.com>
+ * Copyright (C) 2017 Hauke Mehrtens <hauke@hauke-m.de>
+ */
+
+#include <linux/clk.h>
+#include <linux/delay.h>
+#include <linux/dma-mapping.h>
+#include <linux/firmware.h>
+#include <linux/mfd/syscon.h>
+#include <linux/module.h>
+#include <linux/reboot.h>
+#include <linux/regmap.h>
+#include <linux/reset.h>
+#include <linux/of_device.h>
+#include <linux/of_platform.h>
+#include <linux/property.h>
+#include <dt-bindings/mips/lantiq_rcu_gphy.h>
+
+#include <lantiq_soc.h>
+
+#define XRX200_GPHY_FW_ALIGN (16 * 1024)
+
+struct xway_gphy_priv {
+ struct clk *gphy_clk_gate;
+ struct reset_control *gphy_reset;
+ struct reset_control *gphy_reset2;
+ struct notifier_block gphy_reboot_nb;
+ void __iomem *membase;
+ char *fw_name;
+};
+
+struct xway_gphy_match_data {
+ char *fe_firmware_name;
+ char *ge_firmware_name;
+};
+
+static const struct xway_gphy_match_data xrx200a1x_gphy_data = {
+ .fe_firmware_name = "lantiq/xrx200_phy22f_a14.bin",
+ .ge_firmware_name = "lantiq/xrx200_phy11g_a14.bin",
+};
+
+static const struct xway_gphy_match_data xrx200a2x_gphy_data = {
+ .fe_firmware_name = "lantiq/xrx200_phy22f_a22.bin",
+ .ge_firmware_name = "lantiq/xrx200_phy11g_a22.bin",
+};
+
+static const struct xway_gphy_match_data xrx300_gphy_data = {
+ .fe_firmware_name = "lantiq/xrx300_phy22f_a21.bin",
+ .ge_firmware_name = "lantiq/xrx300_phy11g_a21.bin",
+};
+
+static const struct of_device_id xway_gphy_match[] = {
+ { .compatible = "lantiq,xrx200a1x-gphy", .data = &xrx200a1x_gphy_data },
+ { .compatible = "lantiq,xrx200a2x-gphy", .data = &xrx200a2x_gphy_data },
+ { .compatible = "lantiq,xrx300-gphy", .data = &xrx300_gphy_data },
+ { .compatible = "lantiq,xrx330-gphy", .data = &xrx300_gphy_data },
+ {},
+};
+MODULE_DEVICE_TABLE(of, xway_gphy_match);
+
+static struct xway_gphy_priv *to_xway_gphy_priv(struct notifier_block *nb)
+{
+ return container_of(nb, struct xway_gphy_priv, gphy_reboot_nb);
+}
+
+static int xway_gphy_reboot_notify(struct notifier_block *reboot_nb,
+ unsigned long code, void *unused)
+{
+ struct xway_gphy_priv *priv = to_xway_gphy_priv(reboot_nb);
+
+ if (priv) {
+ reset_control_assert(priv->gphy_reset);
+ reset_control_assert(priv->gphy_reset2);
+ }
+
+ return NOTIFY_DONE;
+}
+
+static int xway_gphy_load(struct device *dev, struct xway_gphy_priv *priv,
+ dma_addr_t *dev_addr)
+{
+ const struct firmware *fw;
+ void *fw_addr;
+ dma_addr_t dma_addr;
+ size_t size;
+ int ret;
+
+ ret = request_firmware(&fw, priv->fw_name, dev);
+ if (ret) {
+ dev_err(dev, "failed to load firmware: %s, error: %i\n",
+ priv->fw_name, ret);
+ return ret;
+ }
+
+ /*
+ * GPHY cores need the firmware code in a persistent and contiguous
+ * memory area with a 16 kB boundary aligned start address.
+ */
+ size = fw->size + XRX200_GPHY_FW_ALIGN;
+
+ fw_addr = dmam_alloc_coherent(dev, size, &dma_addr, GFP_KERNEL);
+ if (fw_addr) {
+ fw_addr = PTR_ALIGN(fw_addr, XRX200_GPHY_FW_ALIGN);
+ *dev_addr = ALIGN(dma_addr, XRX200_GPHY_FW_ALIGN);
+ memcpy(fw_addr, fw->data, fw->size);
+ } else {
+ dev_err(dev, "failed to alloc firmware memory\n");
+ ret = -ENOMEM;
+ }
+
+ release_firmware(fw);
+
+ return ret;
+}
+
+static int xway_gphy_of_probe(struct platform_device *pdev,
+ struct xway_gphy_priv *priv)
+{
+ struct device *dev = &pdev->dev;
+ const struct xway_gphy_match_data *gphy_fw_name_cfg;
+ u32 gphy_mode;
+ int ret;
+ struct resource *res_gphy;
+
+ gphy_fw_name_cfg = of_device_get_match_data(dev);
+
+ priv->gphy_clk_gate = devm_clk_get(dev, NULL);
+ if (IS_ERR(priv->gphy_clk_gate)) {
+ dev_err(dev, "Failed to lookup gate clock\n");
+ return PTR_ERR(priv->gphy_clk_gate);
+ }
+
+ res_gphy = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ priv->membase = devm_ioremap_resource(dev, res_gphy);
+ if (IS_ERR(priv->membase))
+ return PTR_ERR(priv->membase);
+
+ priv->gphy_reset = devm_reset_control_get(dev, "gphy");
+ if (IS_ERR(priv->gphy_reset)) {
+ if (PTR_ERR(priv->gphy_reset) != -EPROBE_DEFER)
+ dev_err(dev, "Failed to lookup gphy reset\n");
+ return PTR_ERR(priv->gphy_reset);
+ }
+
+ priv->gphy_reset2 = devm_reset_control_get_optional(dev, "gphy2");
+ if (IS_ERR(priv->gphy_reset2))
+ return PTR_ERR(priv->gphy_reset2);
+
+ ret = device_property_read_u32(dev, "lantiq,gphy-mode", &gphy_mode);
+ /* Default to GE mode */
+ if (ret)
+ gphy_mode = GPHY_MODE_GE;
+
+ switch (gphy_mode) {
+ case GPHY_MODE_FE:
+ priv->fw_name = gphy_fw_name_cfg->fe_firmware_name;
+ break;
+ case GPHY_MODE_GE:
+ priv->fw_name = gphy_fw_name_cfg->ge_firmware_name;
+ break;
+ default:
+ dev_err(dev, "Unknown GPHY mode %d\n", gphy_mode);
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+static int xway_gphy_probe(struct platform_device *pdev)
+{
+ struct device *dev = &pdev->dev;
+ struct xway_gphy_priv *priv;
+ dma_addr_t fw_addr = 0;
+ int ret;
+
+ priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
+ if (!priv)
+ return -ENOMEM;
+
+ ret = xway_gphy_of_probe(pdev, priv);
+ if (ret)
+ return ret;
+
+ ret = clk_prepare_enable(priv->gphy_clk_gate);
+ if (ret)
+ return ret;
+
+ ret = xway_gphy_load(dev, priv, &fw_addr);
+ if (ret) {
+ clk_disable_unprepare(priv->gphy_clk_gate);
+ return ret;
+ }
+
+ reset_control_assert(priv->gphy_reset);
+ reset_control_assert(priv->gphy_reset2);
+
+ iowrite32be(fw_addr, priv->membase);
+
+ reset_control_deassert(priv->gphy_reset);
+ reset_control_deassert(priv->gphy_reset2);
+
+ /* assert the gphy reset because it can hang after a reboot: */
+ priv->gphy_reboot_nb.notifier_call = xway_gphy_reboot_notify;
+ priv->gphy_reboot_nb.priority = -1;
+
+ ret = register_reboot_notifier(&priv->gphy_reboot_nb);
+ if (ret)
+ dev_warn(dev, "Failed to register reboot notifier\n");
+
+ platform_set_drvdata(pdev, priv);
+
+ return ret;
+}
+
+static int xway_gphy_remove(struct platform_device *pdev)
+{
+ struct device *dev = &pdev->dev;
+ struct xway_gphy_priv *priv = platform_get_drvdata(pdev);
+ int ret;
+
+ reset_control_assert(priv->gphy_reset);
+ reset_control_assert(priv->gphy_reset2);
+
+ iowrite32be(0, priv->membase);
+
+ clk_disable_unprepare(priv->gphy_clk_gate);
+
+ ret = unregister_reboot_notifier(&priv->gphy_reboot_nb);
+ if (ret)
+ dev_warn(dev, "Failed to unregister reboot notifier\n");
+
+ return 0;
+}
+
+static struct platform_driver xway_gphy_driver = {
+ .probe = xway_gphy_probe,
+ .remove = xway_gphy_remove,
+ .driver = {
+ .name = "xway-rcu-gphy",
+ .of_match_table = xway_gphy_match,
+ },
+};
+
+module_platform_driver(xway_gphy_driver);
+
+MODULE_FIRMWARE("lantiq/xrx300_phy11g_a21.bin");
+MODULE_FIRMWARE("lantiq/xrx300_phy22f_a21.bin");
+MODULE_FIRMWARE("lantiq/xrx200_phy11g_a14.bin");
+MODULE_FIRMWARE("lantiq/xrx200_phy11g_a22.bin");
+MODULE_FIRMWARE("lantiq/xrx200_phy22f_a14.bin");
+MODULE_FIRMWARE("lantiq/xrx200_phy22f_a22.bin");
+MODULE_AUTHOR("Martin Blumenstingl <martin.blumenstingl@googlemail.com>");
+MODULE_DESCRIPTION("Lantiq XWAY GPHY Firmware Loader");
+MODULE_LICENSE("GPL");
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-22 05:13:51 +0000