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