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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
154static int omap4_pwrdm_read_mem_pwrst(struct powerdomain *pwrdm, u8 bank)
155{
156 u32 m, v;
157
158 m = omap2_pwrdm_get_mem_bank_stst_mask(bank);
159
160 v = omap4_prminst_read_inst_reg(pwrdm->prcm_partition, pwrdm->prcm_offs,
161 OMAP4_PM_PWSTST);
162 v &= m;
163 v >>= __ffs(m);
164
165 return v;
166}
167
168static int omap4_pwrdm_read_mem_retst(struct powerdomain *pwrdm, u8 bank)
169{
170 u32 m, v;
171
172 m = omap2_pwrdm_get_mem_bank_retst_mask(bank);
173
174 v = omap4_prminst_read_inst_reg(pwrdm->prcm_partition, pwrdm->prcm_offs,
175 OMAP4_PM_PWSTCTRL);
176 v &= m;
177 v >>= __ffs(m);
178
179 return v;
180}
181
182static int omap4_pwrdm_wait_transition(struct powerdomain *pwrdm)
183{
184 u32 c = 0;
185
186
187
188
189
190
191
192
193 while ((omap4_prminst_read_inst_reg(pwrdm->prcm_partition,
194 pwrdm->prcm_offs,
195 OMAP4_PM_PWSTST) &
196 OMAP_INTRANSITION_MASK) &&
197 (c++ < PWRDM_TRANSITION_BAILOUT))
198 udelay(1);
199
200 if (c > PWRDM_TRANSITION_BAILOUT) {
201 printk(KERN_ERR "powerdomain: waited too long for "
202 "powerdomain %s to complete transition\n", pwrdm->name);
203 return -EAGAIN;
204 }
205
206 pr_debug("powerdomain: completed transition in %d loops\n", c);
207
208 return 0;
209}
210
211struct pwrdm_ops omap4_pwrdm_operations = {
212 .pwrdm_set_next_pwrst = omap4_pwrdm_set_next_pwrst,
213 .pwrdm_read_next_pwrst = omap4_pwrdm_read_next_pwrst,
214 .pwrdm_read_pwrst = omap4_pwrdm_read_pwrst,
215 .pwrdm_read_prev_pwrst = omap4_pwrdm_read_prev_pwrst,
216 .pwrdm_set_lowpwrstchange = omap4_pwrdm_set_lowpwrstchange,
217 .pwrdm_clear_all_prev_pwrst = omap4_pwrdm_clear_all_prev_pwrst,
218 .pwrdm_set_logic_retst = omap4_pwrdm_set_logic_retst,
219 .pwrdm_read_logic_pwrst = omap4_pwrdm_read_logic_pwrst,
220 .pwrdm_read_logic_retst = omap4_pwrdm_read_logic_retst,
221 .pwrdm_read_mem_pwrst = omap4_pwrdm_read_mem_pwrst,
222 .pwrdm_read_mem_retst = omap4_pwrdm_read_mem_retst,
223 .pwrdm_set_mem_onst = omap4_pwrdm_set_mem_onst,
224 .pwrdm_set_mem_retst = omap4_pwrdm_set_mem_retst,
225 .pwrdm_wait_transition = omap4_pwrdm_wait_transition,
226};
227
