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
|
#include <linux/kernel.h>
#include <linux/clk.h>
#include <linux/io.h>
#include <linux/errno.h>
#include <linux/delay.h>
#include <linux/slab.h>
#include <linux/err.h>
#include <asm/div64.h>
#include "clk.h"
#define to_clk_pllv2(clk) (container_of(clk, struct clk_pllv2, clk))
/* PLL Register Offsets */
#define MXC_PLL_DP_CTL 0x00
#define MXC_PLL_DP_CONFIG 0x04
#define MXC_PLL_DP_OP 0x08
#define MXC_PLL_DP_MFD 0x0C
#define MXC_PLL_DP_MFN 0x10
#define MXC_PLL_DP_MFNMINUS 0x14
#define MXC_PLL_DP_MFNPLUS 0x18
#define MXC_PLL_DP_HFS_OP 0x1C
#define MXC_PLL_DP_HFS_MFD 0x20
#define MXC_PLL_DP_HFS_MFN 0x24
#define MXC_PLL_DP_MFN_TOGC 0x28
#define MXC_PLL_DP_DESTAT 0x2c
/* PLL Register Bit definitions */
#define MXC_PLL_DP_CTL_MUL_CTRL 0x2000
#define MXC_PLL_DP_CTL_DPDCK0_2_EN 0x1000
#define MXC_PLL_DP_CTL_DPDCK0_2_OFFSET 12
#define MXC_PLL_DP_CTL_ADE 0x800
#define MXC_PLL_DP_CTL_REF_CLK_DIV 0x400
#define MXC_PLL_DP_CTL_REF_CLK_SEL_MASK (3 << 8)
#define MXC_PLL_DP_CTL_REF_CLK_SEL_OFFSET 8
#define MXC_PLL_DP_CTL_HFSM 0x80
#define MXC_PLL_DP_CTL_PRE 0x40
#define MXC_PLL_DP_CTL_UPEN 0x20
#define MXC_PLL_DP_CTL_RST 0x10
#define MXC_PLL_DP_CTL_RCP 0x8
#define MXC_PLL_DP_CTL_PLM 0x4
#define MXC_PLL_DP_CTL_BRM0 0x2
#define MXC_PLL_DP_CTL_LRF 0x1
#define MXC_PLL_DP_CONFIG_BIST 0x8
#define MXC_PLL_DP_CONFIG_SJC_CE 0x4
#define MXC_PLL_DP_CONFIG_AREN 0x2
#define MXC_PLL_DP_CONFIG_LDREQ 0x1
#define MXC_PLL_DP_OP_MFI_OFFSET 4
#define MXC_PLL_DP_OP_MFI_MASK (0xF << 4)
#define MXC_PLL_DP_OP_PDF_OFFSET 0
#define MXC_PLL_DP_OP_PDF_MASK 0xF
#define MXC_PLL_DP_MFD_OFFSET 0
#define MXC_PLL_DP_MFD_MASK 0x07FFFFFF
#define MXC_PLL_DP_MFN_OFFSET 0x0
#define MXC_PLL_DP_MFN_MASK 0x07FFFFFF
#define MXC_PLL_DP_MFN_TOGC_TOG_DIS (1 << 17)
#define MXC_PLL_DP_MFN_TOGC_TOG_EN (1 << 16)
#define MXC_PLL_DP_MFN_TOGC_CNT_OFFSET 0x0
#define MXC_PLL_DP_MFN_TOGC_CNT_MASK 0xFFFF
#define MXC_PLL_DP_DESTAT_TOG_SEL (1 << 31)
#define MXC_PLL_DP_DESTAT_MFN 0x07FFFFFF
#define MAX_DPLL_WAIT_TRIES 1000 /* 1000 * udelay(1) = 1ms */
struct clk_pllv2 {
struct clk_hw hw;
void __iomem *base;
};
static unsigned long __clk_pllv2_recalc_rate(unsigned long parent_rate,
u32 dp_ctl, u32 dp_op, u32 dp_mfd, u32 dp_mfn)
{
long mfi, mfn, mfd, pdf, ref_clk, mfn_abs;
unsigned long dbl;
s64 temp;
dbl = dp_ctl & MXC_PLL_DP_CTL_DPDCK0_2_EN;
pdf = dp_op & MXC_PLL_DP_OP_PDF_MASK;
mfi = (dp_op & MXC_PLL_DP_OP_MFI_MASK) >> MXC_PLL_DP_OP_MFI_OFFSET;
mfi = (mfi <= 5) ? 5 : mfi;
mfd = dp_mfd & MXC_PLL_DP_MFD_MASK;
mfn = mfn_abs = dp_mfn & MXC_PLL_DP_MFN_MASK;
/* Sign extend to 32-bits */
if (mfn >= 0x04000000) {
mfn |= 0xFC000000;
mfn_abs = -mfn;
}
ref_clk = 2 * parent_rate;
if (dbl != 0)
ref_clk *= 2;
ref_clk /= (pdf + 1);
temp = (u64) ref_clk * mfn_abs;
do_div(temp, mfd + 1);
if (mfn < 0)
temp = -temp;
temp = (ref_clk * mfi) + temp;
return temp;
}
static unsigned long clk_pllv2_recalc_rate(struct clk_hw *hw,
unsigned long parent_rate)
{
u32 dp_op, dp_mfd, dp_mfn, dp_ctl;
void __iomem *pllbase;
struct clk_pllv2 *pll = to_clk_pllv2(hw);
pllbase = pll->base;
dp_ctl = __raw_readl(pllbase + MXC_PLL_DP_CTL);
dp_op = __raw_readl(pllbase + MXC_PLL_DP_OP);
dp_mfd = __raw_readl(pllbase + MXC_PLL_DP_MFD);
dp_mfn = __raw_readl(pllbase + MXC_PLL_DP_MFN);
return __clk_pllv2_recalc_rate(parent_rate, dp_ctl, dp_op, dp_mfd, dp_mfn);
}
static int __clk_pllv2_set_rate(unsigned long rate, unsigned long parent_rate,
u32 *dp_op, u32 *dp_mfd, u32 *dp_mfn)
{
u32 reg;
long mfi, pdf, mfn, mfd = 999999;
s64 temp64;
unsigned long quad_parent_rate;
quad_parent_rate = 4 * parent_rate;
pdf = mfi = -1;
while (++pdf < 16 && mfi < 5)
mfi = rate * (pdf+1) / quad_parent_rate;
if (mfi > 15)
return -EINVAL;
pdf--;
temp64 = rate * (pdf + 1) - quad_parent_rate * mfi;
do_div(temp64, quad_parent_rate / 1000000);
mfn = (long)temp64;
reg = mfi << 4 | pdf;
*dp_op = reg;
*dp_mfd = mfd;
*dp_mfn = mfn;
return 0;
}
static int clk_pllv2_set_rate(struct clk_hw *hw, unsigned long rate,
unsigned long parent_rate)
{
struct clk_pllv2 *pll = to_clk_pllv2(hw);
void __iomem *pllbase;
u32 dp_ctl, dp_op, dp_mfd, dp_mfn;
int ret;
pllbase = pll->base;
ret = __clk_pllv2_set_rate(rate, parent_rate, &dp_op, &dp_mfd, &dp_mfn);
if (ret)
return ret;
dp_ctl = __raw_readl(pllbase + MXC_PLL_DP_CTL);
/* use dpdck0_2 */
__raw_writel(dp_ctl | 0x1000L, pllbase + MXC_PLL_DP_CTL);
__raw_writel(dp_op, pllbase + MXC_PLL_DP_OP);
__raw_writel(dp_mfd, pllbase + MXC_PLL_DP_MFD);
__raw_writel(dp_mfn, pllbase + MXC_PLL_DP_MFN);
return 0;
}
static long clk_pllv2_round_rate(struct clk_hw *hw, unsigned long rate,
unsigned long *prate)
{
u32 dp_op, dp_mfd, dp_mfn;
__clk_pllv2_set_rate(rate, *prate, &dp_op, &dp_mfd, &dp_mfn);
return __clk_pllv2_recalc_rate(*prate, MXC_PLL_DP_CTL_DPDCK0_2_EN,
dp_op, dp_mfd, dp_mfn);
}
static int clk_pllv2_prepare(struct clk_hw *hw)
{
struct clk_pllv2 *pll = to_clk_pllv2(hw);
u32 reg;
void __iomem *pllbase;
int i = 0;
pllbase = pll->base;
reg = __raw_readl(pllbase + MXC_PLL_DP_CTL) | MXC_PLL_DP_CTL_UPEN;
__raw_writel(reg, pllbase + MXC_PLL_DP_CTL);
/* Wait for lock */
do {
reg = __raw_readl(pllbase + MXC_PLL_DP_CTL);
if (reg & MXC_PLL_DP_CTL_LRF)
break;
udelay(1);
} while (++i < MAX_DPLL_WAIT_TRIES);
if (i == MAX_DPLL_WAIT_TRIES) {
pr_err("MX5: pll locking failed\n");
return -EINVAL;
}
return 0;
}
static void clk_pllv2_unprepare(struct clk_hw *hw)
{
struct clk_pllv2 *pll = to_clk_pllv2(hw);
u32 reg;
void __iomem *pllbase;
pllbase = pll->base;
reg = __raw_readl(pllbase + MXC_PLL_DP_CTL) & ~MXC_PLL_DP_CTL_UPEN;
__raw_writel(reg, pllbase + MXC_PLL_DP_CTL);
}
struct clk_ops clk_pllv2_ops = {
.prepare = clk_pllv2_prepare,
.unprepare = clk_pllv2_unprepare,
.recalc_rate = clk_pllv2_recalc_rate,
.round_rate = clk_pllv2_round_rate,
.set_rate = clk_pllv2_set_rate,
};
struct clk *imx_clk_pllv2(const char *name, const char *parent,
void __iomem *base)
{
struct clk_pllv2 *pll;
struct clk *clk;
struct clk_init_data init;
pll = kzalloc(sizeof(*pll), GFP_KERNEL);
if (!pll)
return ERR_PTR(-ENOMEM);
pll->base = base;
init.name = name;
init.ops = &clk_pllv2_ops;
init.flags = 0;
init.parent_names = &parent;
init.num_parents = 1;
pll->hw.init = &init;
clk = clk_register(NULL, &pll->hw);
if (IS_ERR(clk))
kfree(pll);
return clk;
}
|
