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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@openwrt.org>
*/
#include <linux/delay.h>
#include <linux/dma-mapping.h>
#include <linux/module.h>
#include <linux/firmware.h>
#include <linux/of_platform.h>
#include <lantiq_soc.h>
#define XRX200_GPHY_FW_ALIGN (16 * 1024)
static dma_addr_t xway_gphy_load(struct platform_device *pdev)
{
const struct firmware *fw;
dma_addr_t dev_addr = 0;
const char *fw_name;
void *fw_addr;
size_t size;
if (of_property_read_string(pdev->dev.of_node, "firmware", &fw_name)) {
dev_err(&pdev->dev, "failed to load firmware filename\n");
return 0;
}
dev_info(&pdev->dev, "requesting %s\n", fw_name);
if (request_firmware(&fw, fw_name, &pdev->dev)) {
dev_err(&pdev->dev, "failed to load firmware: %s\n", fw_name);
return 0;
}
/*
* 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 = dma_alloc_coherent(&pdev->dev, size, &dev_addr, GFP_KERNEL);
if (fw_addr) {
fw_addr = PTR_ALIGN(fw_addr, XRX200_GPHY_FW_ALIGN);
dev_addr = ALIGN(dev_addr, XRX200_GPHY_FW_ALIGN);
memcpy(fw_addr, fw->data, fw->size);
} else {
dev_err(&pdev->dev, "failed to alloc firmware memory\n");
}
release_firmware(fw);
return dev_addr;
}
static int xway_phy_fw_probe(struct platform_device *pdev)
{
dma_addr_t fw_addr;
struct property *pp;
unsigned char *phyids;
int i, ret = 0;
fw_addr = xway_gphy_load(pdev);
if (!fw_addr)
return -EINVAL;
pp = of_find_property(pdev->dev.of_node, "phys", NULL);
if (!pp)
return -ENOENT;
phyids = pp->value;
for (i = 0; i < pp->length && !ret; i++)
ret = xrx200_gphy_boot(&pdev->dev, phyids[i], fw_addr);
if (!ret)
mdelay(100);
return ret;
}
static const struct of_device_id xway_phy_match[] = {
{ .compatible = "lantiq,phy-xrx200" },
{},
};
MODULE_DEVICE_TABLE(of, xway_phy_match);
static struct platform_driver xway_phy_driver = {
.probe = xway_phy_fw_probe,
.driver = {
.name = "phy-xrx200",
.of_match_table = xway_phy_match,
},
};
module_platform_driver(xway_phy_driver);
MODULE_AUTHOR("John Crispin <blogic@openwrt.org>");
MODULE_DESCRIPTION("Lantiq XRX200 PHY Firmware Loader");
MODULE_LICENSE("GPL");
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