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135 lines
3.7 KiB
Diff
135 lines
3.7 KiB
Diff
From 0224cde212df4abf251f89c3724a800b1949a774 Mon Sep 17 00:00:00 2001
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From: John Crispin <blogic@openwrt.org>
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Date: Mon, 22 Oct 2012 07:52:50 +0200
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Subject: [PATCH 6/6] MIPS: lantiq: adds GPHY firmware loader
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The internal GPHYs need a firmware blob to function properly. This patch adds
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the code needed to request the blob and load it to the PHY.
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Signed-off-by: John Crispin <blogic@openwrt.org>
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Patchwork: http://patchwork.linux-mips.org/patch/4523
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---
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arch/mips/lantiq/Kconfig | 4 ++
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arch/mips/lantiq/xway/Makefile | 2 +
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arch/mips/lantiq/xway/xrx200_phy_fw.c | 97 +++++++++++++++++++++++++++++++++
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3 files changed, 103 insertions(+)
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create mode 100644 arch/mips/lantiq/xway/xrx200_phy_fw.c
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--- a/arch/mips/lantiq/Kconfig
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+++ b/arch/mips/lantiq/Kconfig
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@@ -36,4 +36,8 @@ config PCI_LANTIQ
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bool "PCI Support"
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depends on SOC_XWAY && PCI
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+config XRX200_PHY_FW
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+ bool "XRX200 PHY firmware loader"
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+ depends on SOC_XWAY
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+
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endif
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--- a/arch/mips/lantiq/xway/Makefile
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+++ b/arch/mips/lantiq/xway/Makefile
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@@ -1 +1,3 @@
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obj-y := prom.o sysctrl.o clk.o reset.o dma.o gptu.o
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+
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+obj-$(CONFIG_XRX200_PHY_FW) += xrx200_phy_fw.o
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--- /dev/null
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+++ b/arch/mips/lantiq/xway/xrx200_phy_fw.c
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@@ -0,0 +1,97 @@
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+/*
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+ * This program is free software; you can redistribute it and/or modify it
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+ * under the terms of the GNU General Public License version 2 as published
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+ * by the Free Software Foundation.
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+ *
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+ * Copyright (C) 2012 John Crispin <blogic@openwrt.org>
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+ */
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+
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+#include <linux/delay.h>
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+#include <linux/dma-mapping.h>
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+#include <linux/module.h>
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+#include <linux/firmware.h>
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+#include <linux/of_platform.h>
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+
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+#include <lantiq_soc.h>
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+
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+#define XRX200_GPHY_FW_ALIGN (16 * 1024)
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+
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+static dma_addr_t xway_gphy_load(struct platform_device *pdev)
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+{
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+ const struct firmware *fw;
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+ dma_addr_t dev_addr = 0;
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+ const char *fw_name;
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+ void *fw_addr;
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+ size_t size;
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+
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+ if (of_property_read_string(pdev->dev.of_node, "firmware", &fw_name)) {
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+ dev_err(&pdev->dev, "failed to load firmware filename\n");
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+ return 0;
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+ }
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+
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+ dev_info(&pdev->dev, "requesting %s\n", fw_name);
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+ if (request_firmware(&fw, fw_name, &pdev->dev)) {
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+ dev_err(&pdev->dev, "failed to load firmware: %s\n", fw_name);
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+ return 0;
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+ }
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+
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+ /*
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+ * GPHY cores need the firmware code in a persistent and contiguous
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+ * memory area with a 16 kB boundary aligned start address
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+ */
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+ size = fw->size + XRX200_GPHY_FW_ALIGN;
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+
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+ fw_addr = dma_alloc_coherent(&pdev->dev, size, &dev_addr, GFP_KERNEL);
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+ if (fw_addr) {
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+ fw_addr = PTR_ALIGN(fw_addr, XRX200_GPHY_FW_ALIGN);
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+ dev_addr = ALIGN(dev_addr, XRX200_GPHY_FW_ALIGN);
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+ memcpy(fw_addr, fw->data, fw->size);
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+ } else {
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+ dev_err(&pdev->dev, "failed to alloc firmware memory\n");
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+ }
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+
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+ release_firmware(fw);
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+ return dev_addr;
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+}
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+
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+static int __devinit xway_phy_fw_probe(struct platform_device *pdev)
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+{
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+ dma_addr_t fw_addr;
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+ struct property *pp;
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+ unsigned char *phyids;
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+ int i, ret = 0;
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+
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+ fw_addr = xway_gphy_load(pdev);
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+ if (!fw_addr)
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+ return -EINVAL;
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+ pp = of_find_property(pdev->dev.of_node, "phys", NULL);
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+ if (!pp)
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+ return -ENOENT;
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+ phyids = pp->value;
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+ for (i = 0; i < pp->length && !ret; i++)
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+ ret = xrx200_gphy_boot(&pdev->dev, phyids[i], fw_addr);
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+ if (!ret)
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+ mdelay(100);
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+ return ret;
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+}
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+
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+static const struct of_device_id xway_phy_match[] = {
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+ { .compatible = "lantiq,phy-xrx200" },
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+ {},
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+};
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+MODULE_DEVICE_TABLE(of, xway_phy_match);
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+
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+static struct platform_driver xway_phy_driver = {
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+ .probe = xway_phy_fw_probe,
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+ .driver = {
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+ .name = "phy-xrx200",
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+ .owner = THIS_MODULE,
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+ .of_match_table = xway_phy_match,
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+ },
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+};
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+
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+module_platform_driver(xway_phy_driver);
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+
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+MODULE_AUTHOR("John Crispin <blogic@openwrt.org>");
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+MODULE_DESCRIPTION("Lantiq XRX200 PHY Firmware Loader");
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+MODULE_LICENSE("GPL");
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