mirror of https://gitee.com/openkylin/linux.git
117 lines
2.6 KiB
C
117 lines
2.6 KiB
C
// SPDX-License-Identifier: (GPL-2.0 OR MIT)
|
|
/*
|
|
* Microsemi Ocelot Switch driver
|
|
*
|
|
* Copyright (c) 2017 Microsemi Corporation
|
|
*/
|
|
#include <linux/io.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/platform_device.h>
|
|
|
|
#include "ocelot.h"
|
|
|
|
u32 __ocelot_read_ix(struct ocelot *ocelot, u32 reg, u32 offset)
|
|
{
|
|
u16 target = reg >> TARGET_OFFSET;
|
|
u32 val;
|
|
|
|
WARN_ON(!target);
|
|
|
|
regmap_read(ocelot->targets[target],
|
|
ocelot->map[target][reg & REG_MASK] + offset, &val);
|
|
return val;
|
|
}
|
|
EXPORT_SYMBOL(__ocelot_read_ix);
|
|
|
|
void __ocelot_write_ix(struct ocelot *ocelot, u32 val, u32 reg, u32 offset)
|
|
{
|
|
u16 target = reg >> TARGET_OFFSET;
|
|
|
|
WARN_ON(!target);
|
|
|
|
regmap_write(ocelot->targets[target],
|
|
ocelot->map[target][reg & REG_MASK] + offset, val);
|
|
}
|
|
EXPORT_SYMBOL(__ocelot_write_ix);
|
|
|
|
void __ocelot_rmw_ix(struct ocelot *ocelot, u32 val, u32 mask, u32 reg,
|
|
u32 offset)
|
|
{
|
|
u16 target = reg >> TARGET_OFFSET;
|
|
|
|
WARN_ON(!target);
|
|
|
|
regmap_update_bits(ocelot->targets[target],
|
|
ocelot->map[target][reg & REG_MASK] + offset,
|
|
mask, val);
|
|
}
|
|
EXPORT_SYMBOL(__ocelot_rmw_ix);
|
|
|
|
u32 ocelot_port_readl(struct ocelot_port *port, u32 reg)
|
|
{
|
|
return readl(port->regs + reg);
|
|
}
|
|
EXPORT_SYMBOL(ocelot_port_readl);
|
|
|
|
void ocelot_port_writel(struct ocelot_port *port, u32 val, u32 reg)
|
|
{
|
|
writel(val, port->regs + reg);
|
|
}
|
|
EXPORT_SYMBOL(ocelot_port_writel);
|
|
|
|
int ocelot_regfields_init(struct ocelot *ocelot,
|
|
const struct reg_field *const regfields)
|
|
{
|
|
unsigned int i;
|
|
u16 target;
|
|
|
|
for (i = 0; i < REGFIELD_MAX; i++) {
|
|
struct reg_field regfield = {};
|
|
u32 reg = regfields[i].reg;
|
|
|
|
if (!reg)
|
|
continue;
|
|
|
|
target = regfields[i].reg >> TARGET_OFFSET;
|
|
|
|
regfield.reg = ocelot->map[target][reg & REG_MASK];
|
|
regfield.lsb = regfields[i].lsb;
|
|
regfield.msb = regfields[i].msb;
|
|
|
|
ocelot->regfields[i] =
|
|
devm_regmap_field_alloc(ocelot->dev,
|
|
ocelot->targets[target],
|
|
regfield);
|
|
|
|
if (IS_ERR(ocelot->regfields[i]))
|
|
return PTR_ERR(ocelot->regfields[i]);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL(ocelot_regfields_init);
|
|
|
|
static struct regmap_config ocelot_regmap_config = {
|
|
.reg_bits = 32,
|
|
.val_bits = 32,
|
|
.reg_stride = 4,
|
|
};
|
|
|
|
struct regmap *ocelot_io_platform_init(struct ocelot *ocelot,
|
|
struct platform_device *pdev,
|
|
const char *name)
|
|
{
|
|
struct resource *res;
|
|
void __iomem *regs;
|
|
|
|
res = platform_get_resource_byname(pdev, IORESOURCE_MEM, name);
|
|
regs = devm_ioremap_resource(ocelot->dev, res);
|
|
if (IS_ERR(regs))
|
|
return ERR_CAST(regs);
|
|
|
|
ocelot_regmap_config.name = name;
|
|
return devm_regmap_init_mmio(ocelot->dev, regs,
|
|
&ocelot_regmap_config);
|
|
}
|
|
EXPORT_SYMBOL(ocelot_io_platform_init);
|