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/*
* 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");
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