157 lines
4.2 KiB
C
157 lines
4.2 KiB
C
// SPDX-License-Identifier: GPL-2.0
|
|
/* DSA driver for:
|
|
* Vitesse VSC7385 SparX-G5 5+1-port Integrated Gigabit Ethernet Switch
|
|
* Vitesse VSC7388 SparX-G8 8-port Integrated Gigabit Ethernet Switch
|
|
* Vitesse VSC7395 SparX-G5e 5+1-port Integrated Gigabit Ethernet Switch
|
|
* Vitesse VSC7398 SparX-G8e 8-port Integrated Gigabit Ethernet Switch
|
|
*
|
|
* This driver takes control of the switch chip connected over CPU-attached
|
|
* address bus and configures it to route packages around when connected to
|
|
* a CPU port.
|
|
*
|
|
* Copyright (C) 2019 Pawel Dembicki <paweldembicki@gmail.com>
|
|
* Based on vitesse-vsc-spi.c by:
|
|
* Copyright (C) 2018 Linus Wallej <linus.walleij@linaro.org>
|
|
* Includes portions of code from the firmware uploader by:
|
|
* Copyright (C) 2009 Gabor Juhos <juhosg@openwrt.org>
|
|
*/
|
|
#include <linux/kernel.h>
|
|
#include <linux/module.h>
|
|
#include <linux/of.h>
|
|
#include <linux/platform_device.h>
|
|
|
|
#include "vitesse-vsc73xx.h"
|
|
|
|
#define VSC73XX_CMD_PLATFORM_BLOCK_SHIFT 14
|
|
#define VSC73XX_CMD_PLATFORM_BLOCK_MASK 0x7
|
|
#define VSC73XX_CMD_PLATFORM_SUBBLOCK_SHIFT 10
|
|
#define VSC73XX_CMD_PLATFORM_SUBBLOCK_MASK 0xf
|
|
#define VSC73XX_CMD_PLATFORM_REGISTER_SHIFT 2
|
|
|
|
/**
|
|
* struct vsc73xx_platform - VSC73xx Platform state container
|
|
*/
|
|
struct vsc73xx_platform {
|
|
struct platform_device *pdev;
|
|
void __iomem *base_addr;
|
|
struct vsc73xx vsc;
|
|
};
|
|
|
|
static const struct vsc73xx_ops vsc73xx_platform_ops;
|
|
|
|
static u32 vsc73xx_make_addr(u8 block, u8 subblock, u8 reg)
|
|
{
|
|
u32 ret;
|
|
|
|
ret = (block & VSC73XX_CMD_PLATFORM_BLOCK_MASK)
|
|
<< VSC73XX_CMD_PLATFORM_BLOCK_SHIFT;
|
|
ret |= (subblock & VSC73XX_CMD_PLATFORM_SUBBLOCK_MASK)
|
|
<< VSC73XX_CMD_PLATFORM_SUBBLOCK_SHIFT;
|
|
ret |= reg << VSC73XX_CMD_PLATFORM_REGISTER_SHIFT;
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int vsc73xx_platform_read(struct vsc73xx *vsc, u8 block, u8 subblock,
|
|
u8 reg, u32 *val)
|
|
{
|
|
struct vsc73xx_platform *vsc_platform = vsc->priv;
|
|
u32 offset;
|
|
|
|
if (!vsc73xx_is_addr_valid(block, subblock))
|
|
return -EINVAL;
|
|
|
|
offset = vsc73xx_make_addr(block, subblock, reg);
|
|
/* By default vsc73xx running in big-endian mode.
|
|
* (See "Register Addressing" section 5.5.3 in the VSC7385 manual.)
|
|
*/
|
|
*val = ioread32be(vsc_platform->base_addr + offset);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int vsc73xx_platform_write(struct vsc73xx *vsc, u8 block, u8 subblock,
|
|
u8 reg, u32 val)
|
|
{
|
|
struct vsc73xx_platform *vsc_platform = vsc->priv;
|
|
u32 offset;
|
|
|
|
if (!vsc73xx_is_addr_valid(block, subblock))
|
|
return -EINVAL;
|
|
|
|
offset = vsc73xx_make_addr(block, subblock, reg);
|
|
iowrite32be(val, vsc_platform->base_addr + offset);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int vsc73xx_platform_probe(struct platform_device *pdev)
|
|
{
|
|
struct device *dev = &pdev->dev;
|
|
struct vsc73xx_platform *vsc_platform;
|
|
int ret;
|
|
|
|
vsc_platform = devm_kzalloc(dev, sizeof(*vsc_platform), GFP_KERNEL);
|
|
if (!vsc_platform)
|
|
return -ENOMEM;
|
|
|
|
platform_set_drvdata(pdev, vsc_platform);
|
|
vsc_platform->pdev = pdev;
|
|
vsc_platform->vsc.dev = dev;
|
|
vsc_platform->vsc.priv = vsc_platform;
|
|
vsc_platform->vsc.ops = &vsc73xx_platform_ops;
|
|
|
|
/* obtain I/O memory space */
|
|
vsc_platform->base_addr = devm_platform_ioremap_resource(pdev, 0);
|
|
if (IS_ERR(vsc_platform->base_addr)) {
|
|
dev_err(&pdev->dev, "cannot request I/O memory space\n");
|
|
ret = -ENXIO;
|
|
return ret;
|
|
}
|
|
|
|
return vsc73xx_probe(&vsc_platform->vsc);
|
|
}
|
|
|
|
static int vsc73xx_platform_remove(struct platform_device *pdev)
|
|
{
|
|
struct vsc73xx_platform *vsc_platform = platform_get_drvdata(pdev);
|
|
|
|
return vsc73xx_remove(&vsc_platform->vsc);
|
|
}
|
|
|
|
static const struct vsc73xx_ops vsc73xx_platform_ops = {
|
|
.read = vsc73xx_platform_read,
|
|
.write = vsc73xx_platform_write,
|
|
};
|
|
|
|
static const struct of_device_id vsc73xx_of_match[] = {
|
|
{
|
|
.compatible = "vitesse,vsc7385",
|
|
},
|
|
{
|
|
.compatible = "vitesse,vsc7388",
|
|
},
|
|
{
|
|
.compatible = "vitesse,vsc7395",
|
|
},
|
|
{
|
|
.compatible = "vitesse,vsc7398",
|
|
},
|
|
{ },
|
|
};
|
|
MODULE_DEVICE_TABLE(of, vsc73xx_of_match);
|
|
|
|
static struct platform_driver vsc73xx_platform_driver = {
|
|
.probe = vsc73xx_platform_probe,
|
|
.remove = vsc73xx_platform_remove,
|
|
.driver = {
|
|
.name = "vsc73xx-platform",
|
|
.of_match_table = vsc73xx_of_match,
|
|
},
|
|
};
|
|
module_platform_driver(vsc73xx_platform_driver);
|
|
|
|
MODULE_AUTHOR("Pawel Dembicki <paweldembicki@gmail.com>");
|
|
MODULE_DESCRIPTION("Vitesse VSC7385/7388/7395/7398 Platform driver");
|
|
MODULE_LICENSE("GPL v2");
|