1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
|
/* SPDX-License-Identifier: GPL-2.0 */
/*
* OMAP Smartreflex Defines and Routines
*
* Author: Thara Gopinath <thara@ti.com>
*
* Copyright (C) 2010 Texas Instruments, Inc.
* Thara Gopinath <thara@ti.com>
*
* Copyright (C) 2008 Nokia Corporation
* Kalle Jokiniemi
*
* Copyright (C) 2007 Texas Instruments, Inc.
* Lesly A M <x0080970@ti.com>
*/
#ifndef __POWER_SMARTREFLEX_H
#define __POWER_SMARTREFLEX_H
#include <linux/types.h>
#include <linux/platform_device.h>
#include <linux/delay.h>
#include <linux/platform_data/voltage-omap.h>
/*
* Different Smartreflex IPs version. The v1 is the 65nm version used in
* OMAP3430. The v2 is the update for the 45nm version of the IP
* used in OMAP3630 and OMAP4430
*/
#define SR_TYPE_V1 1
#define SR_TYPE_V2 2
/* SMART REFLEX REG ADDRESS OFFSET */
#define SRCONFIG 0x00
#define SRSTATUS 0x04
#define SENVAL 0x08
#define SENMIN 0x0C
#define SENMAX 0x10
#define SENAVG 0x14
#define AVGWEIGHT 0x18
#define NVALUERECIPROCAL 0x1c
#define SENERROR_V1 0x20
#define ERRCONFIG_V1 0x24
#define IRQ_EOI 0x20
#define IRQSTATUS_RAW 0x24
#define IRQSTATUS 0x28
#define IRQENABLE_SET 0x2C
#define IRQENABLE_CLR 0x30
#define SENERROR_V2 0x34
#define ERRCONFIG_V2 0x38
/* Bit/Shift Positions */
/* SRCONFIG */
#define SRCONFIG_ACCUMDATA_SHIFT 22
#define SRCONFIG_SRCLKLENGTH_SHIFT 12
#define SRCONFIG_SENNENABLE_V1_SHIFT 5
#define SRCONFIG_SENPENABLE_V1_SHIFT 3
#define SRCONFIG_SENNENABLE_V2_SHIFT 1
#define SRCONFIG_SENPENABLE_V2_SHIFT 0
#define SRCONFIG_CLKCTRL_SHIFT 0
#define SRCONFIG_ACCUMDATA_MASK (0x3ff << 22)
#define SRCONFIG_SRENABLE BIT(11)
#define SRCONFIG_SENENABLE BIT(10)
#define SRCONFIG_ERRGEN_EN BIT(9)
#define SRCONFIG_MINMAXAVG_EN BIT(8)
#define SRCONFIG_DELAYCTRL BIT(2)
/* AVGWEIGHT */
#define AVGWEIGHT_SENPAVGWEIGHT_SHIFT 2
#define AVGWEIGHT_SENNAVGWEIGHT_SHIFT 0
/* NVALUERECIPROCAL */
#define NVALUERECIPROCAL_SENPGAIN_SHIFT 20
#define NVALUERECIPROCAL_SENNGAIN_SHIFT 16
#define NVALUERECIPROCAL_RNSENP_SHIFT 8
#define NVALUERECIPROCAL_RNSENN_SHIFT 0
/* ERRCONFIG */
#define ERRCONFIG_ERRWEIGHT_SHIFT 16
#define ERRCONFIG_ERRMAXLIMIT_SHIFT 8
#define ERRCONFIG_ERRMINLIMIT_SHIFT 0
#define SR_ERRWEIGHT_MASK (0x07 << 16)
#define SR_ERRMAXLIMIT_MASK (0xff << 8)
#define SR_ERRMINLIMIT_MASK (0xff << 0)
#define ERRCONFIG_VPBOUNDINTEN_V1 BIT(31)
#define ERRCONFIG_VPBOUNDINTST_V1 BIT(30)
#define ERRCONFIG_MCUACCUMINTEN BIT(29)
#define ERRCONFIG_MCUACCUMINTST BIT(28)
#define ERRCONFIG_MCUVALIDINTEN BIT(27)
#define ERRCONFIG_MCUVALIDINTST BIT(26)
#define ERRCONFIG_MCUBOUNDINTEN BIT(25)
#define ERRCONFIG_MCUBOUNDINTST BIT(24)
#define ERRCONFIG_MCUDISACKINTEN BIT(23)
#define ERRCONFIG_VPBOUNDINTST_V2 BIT(23)
#define ERRCONFIG_MCUDISACKINTST BIT(22)
#define ERRCONFIG_VPBOUNDINTEN_V2 BIT(22)
#define ERRCONFIG_STATUS_V1_MASK (ERRCONFIG_VPBOUNDINTST_V1 | \
ERRCONFIG_MCUACCUMINTST | \
ERRCONFIG_MCUVALIDINTST | \
ERRCONFIG_MCUBOUNDINTST | \
ERRCONFIG_MCUDISACKINTST)
/* IRQSTATUS */
#define IRQSTATUS_MCUACCUMINT BIT(3)
#define IRQSTATUS_MCVALIDINT BIT(2)
#define IRQSTATUS_MCBOUNDSINT BIT(1)
#define IRQSTATUS_MCUDISABLEACKINT BIT(0)
/* IRQENABLE_SET and IRQENABLE_CLEAR */
#define IRQENABLE_MCUACCUMINT BIT(3)
#define IRQENABLE_MCUVALIDINT BIT(2)
#define IRQENABLE_MCUBOUNDSINT BIT(1)
#define IRQENABLE_MCUDISABLEACKINT BIT(0)
/* Common Bit values */
#define SRCLKLENGTH_12MHZ_SYSCLK 0x3c
#define SRCLKLENGTH_13MHZ_SYSCLK 0x41
#define SRCLKLENGTH_19MHZ_SYSCLK 0x60
#define SRCLKLENGTH_26MHZ_SYSCLK 0x82
#define SRCLKLENGTH_38MHZ_SYSCLK 0xC0
/*
* 3430 specific values. Maybe these should be passed from board file or
* pmic structures.
*/
#define OMAP3430_SR_ACCUMDATA 0x1f4
#define OMAP3430_SR1_SENPAVGWEIGHT 0x03
#define OMAP3430_SR1_SENNAVGWEIGHT 0x03
#define OMAP3430_SR2_SENPAVGWEIGHT 0x01
#define OMAP3430_SR2_SENNAVGWEIGHT 0x01
#define OMAP3430_SR_ERRWEIGHT 0x04
#define OMAP3430_SR_ERRMAXLIMIT 0x02
enum sr_instance {
OMAP_SR_MPU, /* shared with iva on omap3 */
OMAP_SR_CORE,
OMAP_SR_IVA,
OMAP_SR_NR,
};
struct omap_sr {
char *name;
struct list_head node;
struct platform_device *pdev;
struct omap_sr_nvalue_table *nvalue_table;
struct voltagedomain *voltdm;
struct dentry *dbg_dir;
unsigned int irq;
int srid;
int ip_type;
int nvalue_count;
bool autocomp_active;
u32 clk_length;
u32 err_weight;
u32 err_minlimit;
u32 err_maxlimit;
u32 accum_data;
u32 senn_avgweight;
u32 senp_avgweight;
u32 senp_mod;
u32 senn_mod;
void __iomem *base;
};
/**
* test_cond_timeout - busy-loop, testing a condition
* @cond: condition to test until it evaluates to true
* @timeout: maximum number of microseconds in the timeout
* @index: loop index (integer)
*
* Loop waiting for @cond to become true or until at least @timeout
* microseconds have passed. To use, define some integer @index in the
* calling code. After running, if @index == @timeout, then the loop has
* timed out.
*
* Copied from omap_test_timeout */
#define sr_test_cond_timeout(cond, timeout, index) \
({ \
for (index = 0; index < timeout; index++) { \
if (cond) \
break; \
udelay(1); \
} \
})
/**
* struct omap_sr_pmic_data - Strucutre to be populated by pmic code to pass
* pmic specific info to smartreflex driver
*
* @sr_pmic_init: API to initialize smartreflex on the PMIC side.
*/
struct omap_sr_pmic_data {
void (*sr_pmic_init) (void);
};
/**
* struct omap_smartreflex_dev_attr - Smartreflex Device attribute.
*
* @sensor_voltdm_name: Name of voltdomain of SR instance
*/
struct omap_smartreflex_dev_attr {
const char *sensor_voltdm_name;
};
/*
* The smart reflex driver supports CLASS1 CLASS2 and CLASS3 SR.
* The smartreflex class driver should pass the class type.
* Should be used to populate the class_type field of the
* omap_smartreflex_class_data structure.
*/
#define SR_CLASS1 0x1
#define SR_CLASS2 0x2
#define SR_CLASS3 0x3
/**
* struct omap_sr_class_data - Smartreflex class driver info
*
* @enable: API to enable a particular class smaartreflex.
* @disable: API to disable a particular class smartreflex.
* @configure: API to configure a particular class smartreflex.
* @notify: API to notify the class driver about an event in SR.
* Not needed for class3.
* @notify_flags: specify the events to be notified to the class driver
* @class_type: specify which smartreflex class.
* Can be used by the SR driver to take any class
* based decisions.
*/
struct omap_sr_class_data {
int (*enable)(struct omap_sr *sr);
int (*disable)(struct omap_sr *sr, int is_volt_reset);
int (*configure)(struct omap_sr *sr);
int (*notify)(struct omap_sr *sr, u32 status);
u8 notify_flags;
u8 class_type;
};
/**
* struct omap_sr_nvalue_table - Smartreflex n-target value info
*
* @efuse_offs: The offset of the efuse where n-target values are stored.
* @nvalue: The n-target value.
* @errminlimit: The value of the ERRMINLIMIT bitfield for this n-target
* @volt_nominal: microvolts DC that the VDD is initially programmed to
*/
struct omap_sr_nvalue_table {
u32 efuse_offs;
u32 nvalue;
u32 errminlimit;
unsigned long volt_nominal;
};
/**
* struct omap_sr_data - Smartreflex platform data.
*
* @name: instance name
* @ip_type: Smartreflex IP type.
* @senp_mod: SENPENABLE value of the sr CONFIG register
* @senn_mod: SENNENABLE value for sr CONFIG register
* @err_weight ERRWEIGHT value of the sr ERRCONFIG register
* @err_maxlimit ERRMAXLIMIT value of the sr ERRCONFIG register
* @accum_data ACCUMDATA value of the sr CONFIG register
* @senn_avgweight SENNAVGWEIGHT value of the sr AVGWEIGHT register
* @senp_avgweight SENPAVGWEIGHT value of the sr AVGWEIGHT register
* @nvalue_count: Number of distinct nvalues in the nvalue table
* @enable_on_init: whether this sr module needs to enabled at
* boot up or not.
* @nvalue_table: table containing the efuse offsets and nvalues
* corresponding to them.
* @voltdm: Pointer to the voltage domain associated with the SR
*/
struct omap_sr_data {
const char *name;
int ip_type;
u32 senp_mod;
u32 senn_mod;
u32 err_weight;
u32 err_maxlimit;
u32 accum_data;
u32 senn_avgweight;
u32 senp_avgweight;
int nvalue_count;
bool enable_on_init;
struct omap_sr_nvalue_table *nvalue_table;
struct voltagedomain *voltdm;
};
extern struct omap_sr_data omap_sr_pdata[OMAP_SR_NR];
#ifdef CONFIG_POWER_AVS_OMAP
/* Smartreflex module enable/disable interface */
void omap_sr_enable(struct voltagedomain *voltdm);
void omap_sr_disable(struct voltagedomain *voltdm);
void omap_sr_disable_reset_volt(struct voltagedomain *voltdm);
/* Smartreflex driver hooks to be called from Smartreflex class driver */
int sr_enable(struct omap_sr *sr, unsigned long volt);
void sr_disable(struct omap_sr *sr);
int sr_configure_errgen(struct omap_sr *sr);
int sr_disable_errgen(struct omap_sr *sr);
int sr_configure_minmax(struct omap_sr *sr);
/* API to register the smartreflex class driver with the smartreflex driver */
int sr_register_class(struct omap_sr_class_data *class_data);
#else
static inline void omap_sr_enable(struct voltagedomain *voltdm) {}
static inline void omap_sr_disable(struct voltagedomain *voltdm) {}
static inline void omap_sr_disable_reset_volt(
struct voltagedomain *voltdm) {}
#endif
#endif
|
