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1/*
2 * OMAP3/OMAP4 smartreflex device file
3 *
4 * Author: Thara Gopinath <thara@ti.com>
5 *
6 * Based originally on code from smartreflex.c
7 * Copyright (C) 2010 Texas Instruments, Inc.
8 * Thara Gopinath <thara@ti.com>
9 *
10 * Copyright (C) 2008 Nokia Corporation
11 * Kalle Jokiniemi
12 *
13 * Copyright (C) 2007 Texas Instruments, Inc.
14 * Lesly A M <x0080970@ti.com>
15 *
16 * This program is free software; you can redistribute it and/or modify
17 * it under the terms of the GNU General Public License version 2 as
18 * published by the Free Software Foundation.
19 */
20
21#include <linux/err.h>
22#include <linux/slab.h>
23#include <linux/io.h>
24
25#include <plat/omap_device.h>
26
27#include "smartreflex.h"
28#include "voltage.h"
29#include "control.h"
30#include "pm.h"
31
32static bool sr_enable_on_init;
33
34/* Read EFUSE values from control registers for OMAP3430 */
35static void __init sr_set_nvalues(struct omap_volt_data *volt_data,
36 struct omap_sr_data *sr_data)
37{
38 struct omap_sr_nvalue_table *nvalue_table;
39 int i, count = 0;
40
41 while (volt_data[count].volt_nominal)
42 count++;
43
44 nvalue_table = kzalloc(sizeof(struct omap_sr_nvalue_table)*count,
45 GFP_KERNEL);
46
47 for (i = 0; i < count; i++) {
48 u32 v;
49 /*
50 * In OMAP4 the efuse registers are 24 bit aligned.
51 * A __raw_readl will fail for non-32 bit aligned address
52 * and hence the 8-bit read and shift.
53 */
54 if (cpu_is_omap44xx()) {
55 u16 offset = volt_data[i].sr_efuse_offs;
56
57 v = omap_ctrl_readb(offset) |
58 omap_ctrl_readb(offset + 1) << 8 |
59 omap_ctrl_readb(offset + 2) << 16;
60 } else {
61 v = omap_ctrl_readl(volt_data[i].sr_efuse_offs);
62 }
63
64 nvalue_table[i].efuse_offs = volt_data[i].sr_efuse_offs;
65 nvalue_table[i].nvalue = v;
66 }
67
68 sr_data->nvalue_table = nvalue_table;
69 sr_data->nvalue_count = count;
70}
71
72static int __init sr_dev_init(struct omap_hwmod *oh, void *user)
73{
74 struct omap_sr_data *sr_data;
75 struct platform_device *pdev;
76 struct omap_volt_data *volt_data;
77 struct omap_smartreflex_dev_attr *sr_dev_attr;
78 char *name = "smartreflex";
79 static int i;
80
81 sr_data = kzalloc(sizeof(struct omap_sr_data), GFP_KERNEL);
82 if (!sr_data) {
83 pr_err("%s: Unable to allocate memory for %s sr_data.Error!\n",
84 __func__, oh->name);
85 return -ENOMEM;
86 }
87
88 sr_dev_attr = (struct omap_smartreflex_dev_attr *)oh->dev_attr;
89 if (!sr_dev_attr || !sr_dev_attr->sensor_voltdm_name) {
90 pr_err("%s: No voltage domain specified for %s."
91 "Cannot initialize\n", __func__,
92 oh->name);
93 goto exit;
94 }
95
96 sr_data->ip_type = oh->class->rev;
97 sr_data->senn_mod = 0x1;
98 sr_data->senp_mod = 0x1;
99
100 sr_data->voltdm = voltdm_lookup(sr_dev_attr->sensor_voltdm_name);
101 if (IS_ERR(sr_data->voltdm)) {
102 pr_err("%s: Unable to get voltage domain pointer for VDD %s\n",
103 __func__, sr_dev_attr->sensor_voltdm_name);
104 goto exit;
105 }
106
107 omap_voltage_get_volttable(sr_data->voltdm, &volt_data);
108 if (!volt_data) {
109 pr_warning("%s: No Voltage table registerd fo VDD%d."
110 "Something really wrong\n\n", __func__, i + 1);
111 goto exit;
112 }
113
114 sr_set_nvalues(volt_data, sr_data);
115
116 sr_data->enable_on_init = sr_enable_on_init;
117
118 pdev = omap_device_build(name, i, oh, sr_data, sizeof(*sr_data),
119 NULL, 0, 0);
120 if (IS_ERR(pdev))
121 pr_warning("%s: Could not build omap_device for %s: %s.\n\n",
122 __func__, name, oh->name);
123exit:
124 i++;
125 kfree(sr_data);
126 return 0;
127}
128
129/*
130 * API to be called from board files to enable smartreflex
131 * autocompensation at init.
132 */
133void __init omap_enable_smartreflex_on_init(void)
134{
135 sr_enable_on_init = true;
136}
137
138int __init omap_devinit_smartreflex(void)
139{
140 return omap_hwmod_for_each_by_class("smartreflex", sr_dev_init, NULL);
141}
1/*
2 * OMAP3/OMAP4 smartreflex device file
3 *
4 * Author: Thara Gopinath <thara@ti.com>
5 *
6 * Based originally on code from smartreflex.c
7 * Copyright (C) 2010 Texas Instruments, Inc.
8 * Thara Gopinath <thara@ti.com>
9 *
10 * Copyright (C) 2008 Nokia Corporation
11 * Kalle Jokiniemi
12 *
13 * Copyright (C) 2007 Texas Instruments, Inc.
14 * Lesly A M <x0080970@ti.com>
15 *
16 * This program is free software; you can redistribute it and/or modify
17 * it under the terms of the GNU General Public License version 2 as
18 * published by the Free Software Foundation.
19 */
20#include <linux/power/smartreflex.h>
21
22#include <linux/err.h>
23#include <linux/slab.h>
24#include <linux/io.h>
25
26#include "soc.h"
27#include "omap_device.h"
28#include "voltage.h"
29#include "control.h"
30#include "pm.h"
31
32static bool sr_enable_on_init;
33
34/* Read EFUSE values from control registers for OMAP3430 */
35static void __init sr_set_nvalues(struct omap_volt_data *volt_data,
36 struct omap_sr_data *sr_data)
37{
38 struct omap_sr_nvalue_table *nvalue_table;
39 int i, j, count = 0;
40
41 sr_data->nvalue_count = 0;
42 sr_data->nvalue_table = NULL;
43
44 while (volt_data[count].volt_nominal)
45 count++;
46
47 nvalue_table = kcalloc(count, sizeof(*nvalue_table), GFP_KERNEL);
48 if (!nvalue_table)
49 return;
50
51 for (i = 0, j = 0; i < count; i++) {
52 u32 v;
53
54 /*
55 * In OMAP4 the efuse registers are 24 bit aligned.
56 * A readl_relaxed will fail for non-32 bit aligned address
57 * and hence the 8-bit read and shift.
58 */
59 if (cpu_is_omap44xx()) {
60 u16 offset = volt_data[i].sr_efuse_offs;
61
62 v = omap_ctrl_readb(offset) |
63 omap_ctrl_readb(offset + 1) << 8 |
64 omap_ctrl_readb(offset + 2) << 16;
65 } else {
66 v = omap_ctrl_readl(volt_data[i].sr_efuse_offs);
67 }
68
69 /*
70 * Many OMAP SoCs don't have the eFuse values set.
71 * For example, pretty much all OMAP3xxx before
72 * ES3.something.
73 *
74 * XXX There needs to be some way for board files or
75 * userspace to add these in.
76 */
77 if (v == 0)
78 continue;
79
80 nvalue_table[j].nvalue = v;
81 nvalue_table[j].efuse_offs = volt_data[i].sr_efuse_offs;
82 nvalue_table[j].errminlimit = volt_data[i].sr_errminlimit;
83 nvalue_table[j].volt_nominal = volt_data[i].volt_nominal;
84
85 j++;
86 }
87
88 sr_data->nvalue_table = nvalue_table;
89 sr_data->nvalue_count = j;
90}
91
92extern struct omap_sr_data omap_sr_pdata[];
93
94static int __init sr_dev_init(struct omap_hwmod *oh, void *user)
95{
96 struct omap_sr_data *sr_data = NULL;
97 struct omap_volt_data *volt_data;
98 struct omap_smartreflex_dev_attr *sr_dev_attr;
99 static int i;
100
101 if (!strncmp(oh->name, "smartreflex_mpu_iva", 20) ||
102 !strncmp(oh->name, "smartreflex_mpu", 16))
103 sr_data = &omap_sr_pdata[OMAP_SR_MPU];
104 else if (!strncmp(oh->name, "smartreflex_core", 17))
105 sr_data = &omap_sr_pdata[OMAP_SR_CORE];
106 else if (!strncmp(oh->name, "smartreflex_iva", 16))
107 sr_data = &omap_sr_pdata[OMAP_SR_IVA];
108
109 if (!sr_data) {
110 pr_err("%s: Unknown instance %s\n", __func__, oh->name);
111 return -EINVAL;
112 }
113
114 sr_dev_attr = (struct omap_smartreflex_dev_attr *)oh->dev_attr;
115 if (!sr_dev_attr || !sr_dev_attr->sensor_voltdm_name) {
116 pr_err("%s: No voltage domain specified for %s. Cannot initialize\n",
117 __func__, oh->name);
118 goto exit;
119 }
120
121 sr_data->name = oh->name;
122 sr_data->ip_type = oh->class->rev;
123 sr_data->senn_mod = 0x1;
124 sr_data->senp_mod = 0x1;
125
126 if (cpu_is_omap34xx() || cpu_is_omap44xx()) {
127 sr_data->err_weight = OMAP3430_SR_ERRWEIGHT;
128 sr_data->err_maxlimit = OMAP3430_SR_ERRMAXLIMIT;
129 sr_data->accum_data = OMAP3430_SR_ACCUMDATA;
130 if (!(strcmp(sr_data->name, "smartreflex_mpu"))) {
131 sr_data->senn_avgweight = OMAP3430_SR1_SENNAVGWEIGHT;
132 sr_data->senp_avgweight = OMAP3430_SR1_SENPAVGWEIGHT;
133 } else {
134 sr_data->senn_avgweight = OMAP3430_SR2_SENNAVGWEIGHT;
135 sr_data->senp_avgweight = OMAP3430_SR2_SENPAVGWEIGHT;
136 }
137 }
138
139 sr_data->voltdm = voltdm_lookup(sr_dev_attr->sensor_voltdm_name);
140 if (!sr_data->voltdm) {
141 pr_err("%s: Unable to get voltage domain pointer for VDD %s\n",
142 __func__, sr_dev_attr->sensor_voltdm_name);
143 goto exit;
144 }
145
146 omap_voltage_get_volttable(sr_data->voltdm, &volt_data);
147 if (!volt_data) {
148 pr_err("%s: No Voltage table registered for VDD%d\n",
149 __func__, i + 1);
150 goto exit;
151 }
152
153 sr_set_nvalues(volt_data, sr_data);
154
155 sr_data->enable_on_init = sr_enable_on_init;
156
157exit:
158 i++;
159
160 return 0;
161}
162
163/*
164 * API to be called from board files to enable smartreflex
165 * autocompensation at init.
166 */
167void __init omap_enable_smartreflex_on_init(void)
168{
169 sr_enable_on_init = true;
170}
171
172int __init omap_devinit_smartreflex(void)
173{
174 return omap_hwmod_for_each_by_class("smartreflex", sr_dev_init, NULL);
175}