1// SPDX-License-Identifier: (GPL-2.0 OR MIT)
  2/*
  3 * Microsemi Ocelot Switch driver
  4 *
  5 * Copyright (c) 2017 Microsemi Corporation
  6 */
  7#include <linux/io.h>
  8#include <linux/kernel.h>
  9#include <linux/platform_device.h>
 10
 11#include "ocelot.h"
 12
 13int __ocelot_bulk_read_ix(struct ocelot *ocelot, u32 reg, u32 offset, void *buf,
 14			  int count)
 15{
 16	u16 target = reg >> TARGET_OFFSET;
 17
 18	WARN_ON(!target);
 19
 20	return regmap_bulk_read(ocelot->targets[target],
 21				ocelot->map[target][reg & REG_MASK] + offset,
 22				buf, count);
 23}
 24EXPORT_SYMBOL_GPL(__ocelot_bulk_read_ix);
 25
 26u32 __ocelot_read_ix(struct ocelot *ocelot, u32 reg, u32 offset)
 27{
 28	u16 target = reg >> TARGET_OFFSET;
 29	u32 val;
 30
 31	WARN_ON(!target);
 32
 33	regmap_read(ocelot->targets[target],
 34		    ocelot->map[target][reg & REG_MASK] + offset, &val);
 35	return val;
 36}
 37EXPORT_SYMBOL_GPL(__ocelot_read_ix);
 38
 39void __ocelot_write_ix(struct ocelot *ocelot, u32 val, u32 reg, u32 offset)
 40{
 41	u16 target = reg >> TARGET_OFFSET;
 42
 43	WARN_ON(!target);
 44
 45	regmap_write(ocelot->targets[target],
 46		     ocelot->map[target][reg & REG_MASK] + offset, val);
 47}
 48EXPORT_SYMBOL_GPL(__ocelot_write_ix);
 49
 50void __ocelot_rmw_ix(struct ocelot *ocelot, u32 val, u32 mask, u32 reg,
 51		     u32 offset)
 52{
 53	u16 target = reg >> TARGET_OFFSET;
 54
 55	WARN_ON(!target);
 56
 57	regmap_update_bits(ocelot->targets[target],
 58			   ocelot->map[target][reg & REG_MASK] + offset,
 59			   mask, val);
 60}
 61EXPORT_SYMBOL_GPL(__ocelot_rmw_ix);
 62
 63u32 ocelot_port_readl(struct ocelot_port *port, u32 reg)
 64{
 65	struct ocelot *ocelot = port->ocelot;
 66	u16 target = reg >> TARGET_OFFSET;
 67	u32 val;
 68
 69	WARN_ON(!target);
 70
 71	regmap_read(port->target, ocelot->map[target][reg & REG_MASK], &val);
 72	return val;
 73}
 74EXPORT_SYMBOL_GPL(ocelot_port_readl);
 75
 76void ocelot_port_writel(struct ocelot_port *port, u32 val, u32 reg)
 77{
 78	struct ocelot *ocelot = port->ocelot;
 79	u16 target = reg >> TARGET_OFFSET;
 80
 81	WARN_ON(!target);
 82
 83	regmap_write(port->target, ocelot->map[target][reg & REG_MASK], val);
 84}
 85EXPORT_SYMBOL_GPL(ocelot_port_writel);
 86
 87void ocelot_port_rmwl(struct ocelot_port *port, u32 val, u32 mask, u32 reg)
 88{
 89	u32 cur = ocelot_port_readl(port, reg);
 90
 91	ocelot_port_writel(port, (cur & (~mask)) | val, reg);
 92}
 93EXPORT_SYMBOL_GPL(ocelot_port_rmwl);
 94
 95u32 __ocelot_target_read_ix(struct ocelot *ocelot, enum ocelot_target target,
 96			    u32 reg, u32 offset)
 97{
 98	u32 val;
 99
100	regmap_read(ocelot->targets[target],
101		    ocelot->map[target][reg] + offset, &val);
102	return val;
103}
104
105void __ocelot_target_write_ix(struct ocelot *ocelot, enum ocelot_target target,
106			      u32 val, u32 reg, u32 offset)
107{
108	regmap_write(ocelot->targets[target],
109		     ocelot->map[target][reg] + offset, val);
110}
111
112int ocelot_regfields_init(struct ocelot *ocelot,
113			  const struct reg_field *const regfields)
114{
115	unsigned int i;
116	u16 target;
117
118	for (i = 0; i < REGFIELD_MAX; i++) {
119		struct reg_field regfield = {};
120		u32 reg = regfields[i].reg;
121
122		if (!reg)
123			continue;
124
125		target = regfields[i].reg >> TARGET_OFFSET;
126
127		regfield.reg = ocelot->map[target][reg & REG_MASK];
128		regfield.lsb = regfields[i].lsb;
129		regfield.msb = regfields[i].msb;
130		regfield.id_size = regfields[i].id_size;
131		regfield.id_offset = regfields[i].id_offset;
132
133		ocelot->regfields[i] =
134		devm_regmap_field_alloc(ocelot->dev,
135					ocelot->targets[target],
136					regfield);
137
138		if (IS_ERR(ocelot->regfields[i]))
139			return PTR_ERR(ocelot->regfields[i]);
140	}
141
142	return 0;
143}
144EXPORT_SYMBOL_GPL(ocelot_regfields_init);
145
146static struct regmap_config ocelot_regmap_config = {
147	.reg_bits	= 32,
148	.val_bits	= 32,
149	.reg_stride	= 4,
150};
151
152struct regmap *ocelot_regmap_init(struct ocelot *ocelot, struct resource *res)
153{
154	void __iomem *regs;
155
156	regs = devm_ioremap_resource(ocelot->dev, res);
157	if (IS_ERR(regs))
158		return ERR_CAST(regs);
159
160	ocelot_regmap_config.name = res->name;
161
162	return devm_regmap_init_mmio(ocelot->dev, regs, &ocelot_regmap_config);
163}
164EXPORT_SYMBOL_GPL(ocelot_regmap_init);