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
__ocelot_read_ix(struct ocelot * ocelot,u32 reg,u32 offset)13 u32 __ocelot_read_ix(struct ocelot *ocelot, u32 reg, u32 offset)
14 {
15 u16 target = reg >> TARGET_OFFSET;
16 u32 val;
17
18 WARN_ON(!target);
19
20 regmap_read(ocelot->targets[target],
21 ocelot->map[target][reg & REG_MASK] + offset, &val);
22 return val;
23 }
24 EXPORT_SYMBOL(__ocelot_read_ix);
25
__ocelot_write_ix(struct ocelot * ocelot,u32 val,u32 reg,u32 offset)26 void __ocelot_write_ix(struct ocelot *ocelot, u32 val, u32 reg, u32 offset)
27 {
28 u16 target = reg >> TARGET_OFFSET;
29
30 WARN_ON(!target);
31
32 regmap_write(ocelot->targets[target],
33 ocelot->map[target][reg & REG_MASK] + offset, val);
34 }
35 EXPORT_SYMBOL(__ocelot_write_ix);
36
__ocelot_rmw_ix(struct ocelot * ocelot,u32 val,u32 mask,u32 reg,u32 offset)37 void __ocelot_rmw_ix(struct ocelot *ocelot, u32 val, u32 mask, u32 reg,
38 u32 offset)
39 {
40 u16 target = reg >> TARGET_OFFSET;
41
42 WARN_ON(!target);
43
44 regmap_update_bits(ocelot->targets[target],
45 ocelot->map[target][reg & REG_MASK] + offset,
46 mask, val);
47 }
48 EXPORT_SYMBOL(__ocelot_rmw_ix);
49
ocelot_port_readl(struct ocelot_port * port,u32 reg)50 u32 ocelot_port_readl(struct ocelot_port *port, u32 reg)
51 {
52 struct ocelot *ocelot = port->ocelot;
53 u16 target = reg >> TARGET_OFFSET;
54 u32 val;
55
56 WARN_ON(!target);
57
58 regmap_read(port->target, ocelot->map[target][reg & REG_MASK], &val);
59 return val;
60 }
61 EXPORT_SYMBOL(ocelot_port_readl);
62
ocelot_port_writel(struct ocelot_port * port,u32 val,u32 reg)63 void ocelot_port_writel(struct ocelot_port *port, u32 val, u32 reg)
64 {
65 struct ocelot *ocelot = port->ocelot;
66 u16 target = reg >> TARGET_OFFSET;
67
68 WARN_ON(!target);
69
70 regmap_write(port->target, ocelot->map[target][reg & REG_MASK], val);
71 }
72 EXPORT_SYMBOL(ocelot_port_writel);
73
__ocelot_target_read_ix(struct ocelot * ocelot,enum ocelot_target target,u32 reg,u32 offset)74 u32 __ocelot_target_read_ix(struct ocelot *ocelot, enum ocelot_target target,
75 u32 reg, u32 offset)
76 {
77 u32 val;
78
79 regmap_read(ocelot->targets[target],
80 ocelot->map[target][reg] + offset, &val);
81 return val;
82 }
83
__ocelot_target_write_ix(struct ocelot * ocelot,enum ocelot_target target,u32 val,u32 reg,u32 offset)84 void __ocelot_target_write_ix(struct ocelot *ocelot, enum ocelot_target target,
85 u32 val, u32 reg, u32 offset)
86 {
87 regmap_write(ocelot->targets[target],
88 ocelot->map[target][reg] + offset, val);
89 }
90
ocelot_regfields_init(struct ocelot * ocelot,const struct reg_field * const regfields)91 int ocelot_regfields_init(struct ocelot *ocelot,
92 const struct reg_field *const regfields)
93 {
94 unsigned int i;
95 u16 target;
96
97 for (i = 0; i < REGFIELD_MAX; i++) {
98 struct reg_field regfield = {};
99 u32 reg = regfields[i].reg;
100
101 if (!reg)
102 continue;
103
104 target = regfields[i].reg >> TARGET_OFFSET;
105
106 regfield.reg = ocelot->map[target][reg & REG_MASK];
107 regfield.lsb = regfields[i].lsb;
108 regfield.msb = regfields[i].msb;
109 regfield.id_size = regfields[i].id_size;
110 regfield.id_offset = regfields[i].id_offset;
111
112 ocelot->regfields[i] =
113 devm_regmap_field_alloc(ocelot->dev,
114 ocelot->targets[target],
115 regfield);
116
117 if (IS_ERR(ocelot->regfields[i]))
118 return PTR_ERR(ocelot->regfields[i]);
119 }
120
121 return 0;
122 }
123 EXPORT_SYMBOL(ocelot_regfields_init);
124
125 static struct regmap_config ocelot_regmap_config = {
126 .reg_bits = 32,
127 .val_bits = 32,
128 .reg_stride = 4,
129 };
130
ocelot_regmap_init(struct ocelot * ocelot,struct resource * res)131 struct regmap *ocelot_regmap_init(struct ocelot *ocelot, struct resource *res)
132 {
133 void __iomem *regs;
134
135 regs = devm_ioremap_resource(ocelot->dev, res);
136 if (IS_ERR(regs))
137 return ERR_CAST(regs);
138
139 ocelot_regmap_config.name = res->name;
140
141 return devm_regmap_init_mmio(ocelot->dev, regs, &ocelot_regmap_config);
142 }
143 EXPORT_SYMBOL(ocelot_regmap_init);
144
