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-rw-r--r--arch/arm/mach-omap2/powerdomain44xx.c285
1 files changed, 0 insertions, 285 deletions
diff --git a/arch/arm/mach-omap2/powerdomain44xx.c b/arch/arm/mach-omap2/powerdomain44xx.c
deleted file mode 100644
index aceb4f464c9b..000000000000
--- a/arch/arm/mach-omap2/powerdomain44xx.c
+++ /dev/null
@@ -1,285 +0,0 @@
1/*
2 * OMAP4 powerdomain control
3 *
4 * Copyright (C) 2009-2010, 2012 Texas Instruments, Inc.
5 * Copyright (C) 2007-2009 Nokia Corporation
6 *
7 * Derived from mach-omap2/powerdomain.c written by Paul Walmsley
8 * Rajendra Nayak <rnayak@ti.com>
9 *
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License version 2 as
12 * published by the Free Software Foundation.
13 */
14
15#include <linux/io.h>
16#include <linux/errno.h>
17#include <linux/delay.h>
18#include <linux/bug.h>
19
20#include "powerdomain.h"
21#include <plat/prcm.h>
22#include "prm2xxx_3xxx.h"
23#include "prm44xx.h"
24#include "prminst44xx.h"
25#include "prm-regbits-44xx.h"
26
27static int omap4_pwrdm_set_next_pwrst(struct powerdomain *pwrdm, u8 pwrst)
28{
29 omap4_prminst_rmw_inst_reg_bits(OMAP_POWERSTATE_MASK,
30 (pwrst << OMAP_POWERSTATE_SHIFT),
31 pwrdm->prcm_partition,
32 pwrdm->prcm_offs, OMAP4_PM_PWSTCTRL);
33 return 0;
34}
35
36static int omap4_pwrdm_read_next_pwrst(struct powerdomain *pwrdm)
37{
38 u32 v;
39
40 v = omap4_prminst_read_inst_reg(pwrdm->prcm_partition, pwrdm->prcm_offs,
41 OMAP4_PM_PWSTCTRL);
42 v &= OMAP_POWERSTATE_MASK;
43 v >>= OMAP_POWERSTATE_SHIFT;
44
45 return v;
46}
47
48static int omap4_pwrdm_read_pwrst(struct powerdomain *pwrdm)
49{
50 u32 v;
51
52 v = omap4_prminst_read_inst_reg(pwrdm->prcm_partition, pwrdm->prcm_offs,
53 OMAP4_PM_PWSTST);
54 v &= OMAP_POWERSTATEST_MASK;
55 v >>= OMAP_POWERSTATEST_SHIFT;
56
57 return v;
58}
59
60static int omap4_pwrdm_read_prev_pwrst(struct powerdomain *pwrdm)
61{
62 u32 v;
63
64 v = omap4_prminst_read_inst_reg(pwrdm->prcm_partition, pwrdm->prcm_offs,
65 OMAP4_PM_PWSTST);
66 v &= OMAP4430_LASTPOWERSTATEENTERED_MASK;
67 v >>= OMAP4430_LASTPOWERSTATEENTERED_SHIFT;
68
69 return v;
70}
71
72static int omap4_pwrdm_set_lowpwrstchange(struct powerdomain *pwrdm)
73{
74 omap4_prminst_rmw_inst_reg_bits(OMAP4430_LOWPOWERSTATECHANGE_MASK,
75 (1 << OMAP4430_LOWPOWERSTATECHANGE_SHIFT),
76 pwrdm->prcm_partition,
77 pwrdm->prcm_offs, OMAP4_PM_PWSTCTRL);
78 return 0;
79}
80
81static int omap4_pwrdm_clear_all_prev_pwrst(struct powerdomain *pwrdm)
82{
83 omap4_prminst_rmw_inst_reg_bits(OMAP4430_LASTPOWERSTATEENTERED_MASK,
84 OMAP4430_LASTPOWERSTATEENTERED_MASK,
85 pwrdm->prcm_partition,
86 pwrdm->prcm_offs, OMAP4_PM_PWSTST);
87 return 0;
88}
89
90static int omap4_pwrdm_set_logic_retst(struct powerdomain *pwrdm, u8 pwrst)
91{
92 u32 v;
93
94 v = pwrst << __ffs(OMAP4430_LOGICRETSTATE_MASK);
95 omap4_prminst_rmw_inst_reg_bits(OMAP4430_LOGICRETSTATE_MASK, v,
96 pwrdm->prcm_partition, pwrdm->prcm_offs,
97 OMAP4_PM_PWSTCTRL);
98
99 return 0;
100}
101
102static int omap4_pwrdm_set_mem_onst(struct powerdomain *pwrdm, u8 bank,
103 u8 pwrst)
104{
105 u32 m;
106
107 m = omap2_pwrdm_get_mem_bank_onstate_mask(bank);
108
109 omap4_prminst_rmw_inst_reg_bits(m, (pwrst << __ffs(m)),
110 pwrdm->prcm_partition, pwrdm->prcm_offs,
111 OMAP4_PM_PWSTCTRL);
112
113 return 0;
114}
115
116static int omap4_pwrdm_set_mem_retst(struct powerdomain *pwrdm, u8 bank,
117 u8 pwrst)
118{
119 u32 m;
120
121 m = omap2_pwrdm_get_mem_bank_retst_mask(bank);
122
123 omap4_prminst_rmw_inst_reg_bits(m, (pwrst << __ffs(m)),
124 pwrdm->prcm_partition, pwrdm->prcm_offs,
125 OMAP4_PM_PWSTCTRL);
126
127 return 0;
128}
129
130static int omap4_pwrdm_read_logic_pwrst(struct powerdomain *pwrdm)
131{
132 u32 v;
133
134 v = omap4_prminst_read_inst_reg(pwrdm->prcm_partition, pwrdm->prcm_offs,
135 OMAP4_PM_PWSTST);
136 v &= OMAP4430_LOGICSTATEST_MASK;
137 v >>= OMAP4430_LOGICSTATEST_SHIFT;
138
139 return v;
140}
141
142static int omap4_pwrdm_read_logic_retst(struct powerdomain *pwrdm)
143{
144 u32 v;
145
146 v = omap4_prminst_read_inst_reg(pwrdm->prcm_partition, pwrdm->prcm_offs,
147 OMAP4_PM_PWSTCTRL);
148 v &= OMAP4430_LOGICRETSTATE_MASK;
149 v >>= OMAP4430_LOGICRETSTATE_SHIFT;
150
151 return v;
152}
153
154/**
155 * omap4_pwrdm_read_prev_logic_pwrst - read the previous logic powerstate
156 * @pwrdm: struct powerdomain * to read the state for
157 *
158 * Reads the previous logic powerstate for a powerdomain. This
159 * function must determine the previous logic powerstate by first
160 * checking the previous powerstate for the domain. If that was OFF,
161 * then logic has been lost. If previous state was RETENTION, the
162 * function reads the setting for the next retention logic state to
163 * see the actual value. In every other case, the logic is
164 * retained. Returns either PWRDM_POWER_OFF or PWRDM_POWER_RET
165 * depending whether the logic was retained or not.
166 */
167static int omap4_pwrdm_read_prev_logic_pwrst(struct powerdomain *pwrdm)
168{
169 int state;
170
171 state = omap4_pwrdm_read_prev_pwrst(pwrdm);
172
173 if (state == PWRDM_POWER_OFF)
174 return PWRDM_POWER_OFF;
175
176 if (state != PWRDM_POWER_RET)
177 return PWRDM_POWER_RET;
178
179 return omap4_pwrdm_read_logic_retst(pwrdm);
180}
181
182static int omap4_pwrdm_read_mem_pwrst(struct powerdomain *pwrdm, u8 bank)
183{
184 u32 m, v;
185
186 m = omap2_pwrdm_get_mem_bank_stst_mask(bank);
187
188 v = omap4_prminst_read_inst_reg(pwrdm->prcm_partition, pwrdm->prcm_offs,
189 OMAP4_PM_PWSTST);
190 v &= m;
191 v >>= __ffs(m);
192
193 return v;
194}
195
196static int omap4_pwrdm_read_mem_retst(struct powerdomain *pwrdm, u8 bank)
197{
198 u32 m, v;
199
200 m = omap2_pwrdm_get_mem_bank_retst_mask(bank);
201
202 v = omap4_prminst_read_inst_reg(pwrdm->prcm_partition, pwrdm->prcm_offs,
203 OMAP4_PM_PWSTCTRL);
204 v &= m;
205 v >>= __ffs(m);
206
207 return v;
208}
209
210/**
211 * omap4_pwrdm_read_prev_mem_pwrst - reads the previous memory powerstate
212 * @pwrdm: struct powerdomain * to read mem powerstate for
213 * @bank: memory bank index
214 *
215 * Reads the previous memory powerstate for a powerdomain. This
216 * function must determine the previous memory powerstate by first
217 * checking the previous powerstate for the domain. If that was OFF,
218 * then logic has been lost. If previous state was RETENTION, the
219 * function reads the setting for the next memory retention state to
220 * see the actual value. In every other case, the logic is
221 * retained. Returns either PWRDM_POWER_OFF or PWRDM_POWER_RET
222 * depending whether logic was retained or not.
223 */
224static int omap4_pwrdm_read_prev_mem_pwrst(struct powerdomain *pwrdm, u8 bank)
225{
226 int state;
227
228 state = omap4_pwrdm_read_prev_pwrst(pwrdm);
229
230 if (state == PWRDM_POWER_OFF)
231 return PWRDM_POWER_OFF;
232
233 if (state != PWRDM_POWER_RET)
234 return PWRDM_POWER_RET;
235
236 return omap4_pwrdm_read_mem_retst(pwrdm, bank);
237}
238
239static int omap4_pwrdm_wait_transition(struct powerdomain *pwrdm)
240{
241 u32 c = 0;
242
243 /*
244 * REVISIT: pwrdm_wait_transition() may be better implemented
245 * via a callback and a periodic timer check -- how long do we expect
246 * powerdomain transitions to take?
247 */
248
249 /* XXX Is this udelay() value meaningful? */
250 while ((omap4_prminst_read_inst_reg(pwrdm->prcm_partition,
251 pwrdm->prcm_offs,
252 OMAP4_PM_PWSTST) &
253 OMAP_INTRANSITION_MASK) &&
254 (c++ < PWRDM_TRANSITION_BAILOUT))
255 udelay(1);
256
257 if (c > PWRDM_TRANSITION_BAILOUT) {
258 pr_err("powerdomain: %s: waited too long to complete transition\n",
259 pwrdm->name);
260 return -EAGAIN;
261 }
262
263 pr_debug("powerdomain: completed transition in %d loops\n", c);
264
265 return 0;
266}
267
268struct pwrdm_ops omap4_pwrdm_operations = {
269 .pwrdm_set_next_pwrst = omap4_pwrdm_set_next_pwrst,
270 .pwrdm_read_next_pwrst = omap4_pwrdm_read_next_pwrst,
271 .pwrdm_read_pwrst = omap4_pwrdm_read_pwrst,
272 .pwrdm_read_prev_pwrst = omap4_pwrdm_read_prev_pwrst,
273 .pwrdm_set_lowpwrstchange = omap4_pwrdm_set_lowpwrstchange,
274 .pwrdm_clear_all_prev_pwrst = omap4_pwrdm_clear_all_prev_pwrst,
275 .pwrdm_set_logic_retst = omap4_pwrdm_set_logic_retst,
276 .pwrdm_read_logic_pwrst = omap4_pwrdm_read_logic_pwrst,
277 .pwrdm_read_prev_logic_pwrst = omap4_pwrdm_read_prev_logic_pwrst,
278 .pwrdm_read_logic_retst = omap4_pwrdm_read_logic_retst,
279 .pwrdm_read_mem_pwrst = omap4_pwrdm_read_mem_pwrst,
280 .pwrdm_read_mem_retst = omap4_pwrdm_read_mem_retst,
281 .pwrdm_read_prev_mem_pwrst = omap4_pwrdm_read_prev_mem_pwrst,
282 .pwrdm_set_mem_onst = omap4_pwrdm_set_mem_onst,
283 .pwrdm_set_mem_retst = omap4_pwrdm_set_mem_retst,
284 .pwrdm_wait_transition = omap4_pwrdm_wait_transition,
285};
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