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 return readl(port->regs + reg);
53 }
54 EXPORT_SYMBOL(ocelot_port_readl);
55
ocelot_port_writel(struct ocelot_port * port,u32 val,u32 reg)56 void ocelot_port_writel(struct ocelot_port *port, u32 val, u32 reg)
57 {
58 writel(val, port->regs + reg);
59 }
60 EXPORT_SYMBOL(ocelot_port_writel);
61
ocelot_regfields_init(struct ocelot * ocelot,const struct reg_field * const regfields)62 int ocelot_regfields_init(struct ocelot *ocelot,
63 const struct reg_field *const regfields)
64 {
65 unsigned int i;
66 u16 target;
67
68 for (i = 0; i < REGFIELD_MAX; i++) {
69 struct reg_field regfield = {};
70 u32 reg = regfields[i].reg;
71
72 if (!reg)
73 continue;
74
75 target = regfields[i].reg >> TARGET_OFFSET;
76
77 regfield.reg = ocelot->map[target][reg & REG_MASK];
78 regfield.lsb = regfields[i].lsb;
79 regfield.msb = regfields[i].msb;
80
81 ocelot->regfields[i] =
82 devm_regmap_field_alloc(ocelot->dev,
83 ocelot->targets[target],
84 regfield);
85
86 if (IS_ERR(ocelot->regfields[i]))
87 return PTR_ERR(ocelot->regfields[i]);
88 }
89
90 return 0;
91 }
92 EXPORT_SYMBOL(ocelot_regfields_init);
93
94 static struct regmap_config ocelot_regmap_config = {
95 .reg_bits = 32,
96 .val_bits = 32,
97 .reg_stride = 4,
98 };
99
ocelot_io_platform_init(struct ocelot * ocelot,struct platform_device * pdev,const char * name)100 struct regmap *ocelot_io_platform_init(struct ocelot *ocelot,
101 struct platform_device *pdev,
102 const char *name)
103 {
104 struct resource *res;
105 void __iomem *regs;
106
107 res = platform_get_resource_byname(pdev, IORESOURCE_MEM, name);
108 regs = devm_ioremap_resource(ocelot->dev, res);
109 if (IS_ERR(regs))
110 return ERR_CAST(regs);
111
112 ocelot_regmap_config.name = name;
113 return devm_regmap_init_mmio(ocelot->dev, regs,
114 &ocelot_regmap_config);
115 }
116 EXPORT_SYMBOL(ocelot_io_platform_init);
117