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_GPL(__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_GPL(__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_GPL(__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_GPL(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_GPL(ocelot_port_writel);
73
ocelot_port_rmwl(struct ocelot_port * port,u32 val,u32 mask,u32 reg)74 void ocelot_port_rmwl(struct ocelot_port *port, u32 val, u32 mask, u32 reg)
75 {
76 u32 cur = ocelot_port_readl(port, reg);
77
78 ocelot_port_writel(port, (cur & (~mask)) | val, reg);
79 }
80 EXPORT_SYMBOL_GPL(ocelot_port_rmwl);
81
__ocelot_target_read_ix(struct ocelot * ocelot,enum ocelot_target target,u32 reg,u32 offset)82 u32 __ocelot_target_read_ix(struct ocelot *ocelot, enum ocelot_target target,
83 u32 reg, u32 offset)
84 {
85 u32 val;
86
87 regmap_read(ocelot->targets[target],
88 ocelot->map[target][reg] + offset, &val);
89 return val;
90 }
91
__ocelot_target_write_ix(struct ocelot * ocelot,enum ocelot_target target,u32 val,u32 reg,u32 offset)92 void __ocelot_target_write_ix(struct ocelot *ocelot, enum ocelot_target target,
93 u32 val, u32 reg, u32 offset)
94 {
95 regmap_write(ocelot->targets[target],
96 ocelot->map[target][reg] + offset, val);
97 }
98
ocelot_regfields_init(struct ocelot * ocelot,const struct reg_field * const regfields)99 int ocelot_regfields_init(struct ocelot *ocelot,
100 const struct reg_field *const regfields)
101 {
102 unsigned int i;
103 u16 target;
104
105 for (i = 0; i < REGFIELD_MAX; i++) {
106 struct reg_field regfield = {};
107 u32 reg = regfields[i].reg;
108
109 if (!reg)
110 continue;
111
112 target = regfields[i].reg >> TARGET_OFFSET;
113
114 regfield.reg = ocelot->map[target][reg & REG_MASK];
115 regfield.lsb = regfields[i].lsb;
116 regfield.msb = regfields[i].msb;
117 regfield.id_size = regfields[i].id_size;
118 regfield.id_offset = regfields[i].id_offset;
119
120 ocelot->regfields[i] =
121 devm_regmap_field_alloc(ocelot->dev,
122 ocelot->targets[target],
123 regfield);
124
125 if (IS_ERR(ocelot->regfields[i]))
126 return PTR_ERR(ocelot->regfields[i]);
127 }
128
129 return 0;
130 }
131 EXPORT_SYMBOL_GPL(ocelot_regfields_init);
132
133 static struct regmap_config ocelot_regmap_config = {
134 .reg_bits = 32,
135 .val_bits = 32,
136 .reg_stride = 4,
137 };
138
ocelot_regmap_init(struct ocelot * ocelot,struct resource * res)139 struct regmap *ocelot_regmap_init(struct ocelot *ocelot, struct resource *res)
140 {
141 void __iomem *regs;
142
143 regs = devm_ioremap_resource(ocelot->dev, res);
144 if (IS_ERR(regs))
145 return ERR_CAST(regs);
146
147 ocelot_regmap_config.name = res->name;
148
149 return devm_regmap_init_mmio(ocelot->dev, regs, &ocelot_regmap_config);
150 }
151 EXPORT_SYMBOL_GPL(ocelot_regmap_init);
152
