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clock-sh7367.c
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1 /*
2  * SH7367 clock framework support
3  *
4  * Copyright (C) 2010 Magnus Damm
5  *
6  * This program is free software; you can redistribute it and/or modify
7  * it under the terms of the GNU General Public License as published by
8  * the Free Software Foundation; version 2 of the License.
9  *
10  * This program is distributed in the hope that it will be useful,
11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13  * GNU General Public License for more details.
14  *
15  * You should have received a copy of the GNU General Public License
16  * along with this program; if not, write to the Free Software
17  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
18  */
19 #include <linux/init.h>
20 #include <linux/kernel.h>
21 #include <linux/io.h>
22 #include <linux/sh_clk.h>
23 #include <linux/clkdev.h>
24 #include <mach/common.h>
25 
26 /* SH7367 registers */
27 #define RTFRQCR IOMEM(0xe6150000)
28 #define SYFRQCR IOMEM(0xe6150004)
29 #define CMFRQCR IOMEM(0xe61500E0)
30 #define VCLKCR1 IOMEM(0xe6150008)
31 #define VCLKCR2 IOMEM(0xe615000C)
32 #define VCLKCR3 IOMEM(0xe615001C)
33 #define SCLKACR IOMEM(0xe6150010)
34 #define SCLKBCR IOMEM(0xe6150014)
35 #define SUBUSBCKCR IOMEM(0xe6158080)
36 #define SPUCKCR IOMEM(0xe6150084)
37 #define MSUCKCR IOMEM(0xe6150088)
38 #define MVI3CKCR IOMEM(0xe6150090)
39 #define VOUCKCR IOMEM(0xe6150094)
40 #define MFCK1CR IOMEM(0xe6150098)
41 #define MFCK2CR IOMEM(0xe615009C)
42 #define PLLC1CR IOMEM(0xe6150028)
43 #define PLLC2CR IOMEM(0xe615002C)
44 #define RTMSTPCR0 IOMEM(0xe6158030)
45 #define RTMSTPCR2 IOMEM(0xe6158038)
46 #define SYMSTPCR0 IOMEM(0xe6158040)
47 #define SYMSTPCR2 IOMEM(0xe6158048)
48 #define CMMSTPCR0 IOMEM(0xe615804c)
49 
50 /* Fixed 32 KHz root clock from EXTALR pin */
51 static struct clk r_clk = {
52  .rate = 32768,
53 };
54 
55 /*
56  * 26MHz default rate for the EXTALB1 root input clock.
57  * If needed, reset this with clk_set_rate() from the platform code.
58  */
60  .rate = 26666666,
61 };
62 
63 /*
64  * 48MHz default rate for the EXTAL2 root input clock.
65  * If needed, reset this with clk_set_rate() from the platform code.
66  */
68  .rate = 48000000,
69 };
70 
71 /* A fixed divide-by-2 block */
72 static unsigned long div2_recalc(struct clk *clk)
73 {
74  return clk->parent->rate / 2;
75 }
76 
77 static struct sh_clk_ops div2_clk_ops = {
78  .recalc = div2_recalc,
79 };
80 
81 /* Divide extalb1 by two */
82 static struct clk extalb1_div2_clk = {
83  .ops = &div2_clk_ops,
84  .parent = &sh7367_extalb1_clk,
85 };
86 
87 /* Divide extal2 by two */
88 static struct clk extal2_div2_clk = {
89  .ops = &div2_clk_ops,
90  .parent = &sh7367_extal2_clk,
91 };
92 
93 /* PLLC1 */
94 static unsigned long pllc1_recalc(struct clk *clk)
95 {
96  unsigned long mult = 1;
97 
98  if (__raw_readl(PLLC1CR) & (1 << 14))
99  mult = (((__raw_readl(RTFRQCR) >> 24) & 0x3f) + 1) * 2;
100 
101  return clk->parent->rate * mult;
102 }
103 
104 static struct sh_clk_ops pllc1_clk_ops = {
105  .recalc = pllc1_recalc,
106 };
107 
108 static struct clk pllc1_clk = {
109  .ops = &pllc1_clk_ops,
110  .flags = CLK_ENABLE_ON_INIT,
111  .parent = &extalb1_div2_clk,
112 };
113 
114 /* Divide PLLC1 by two */
115 static struct clk pllc1_div2_clk = {
116  .ops = &div2_clk_ops,
117  .parent = &pllc1_clk,
118 };
119 
120 /* PLLC2 */
121 static unsigned long pllc2_recalc(struct clk *clk)
122 {
123  unsigned long mult = 1;
124 
125  if (__raw_readl(PLLC2CR) & (1 << 31))
126  mult = (((__raw_readl(PLLC2CR) >> 24) & 0x3f) + 1) * 2;
127 
128  return clk->parent->rate * mult;
129 }
130 
131 static struct sh_clk_ops pllc2_clk_ops = {
132  .recalc = pllc2_recalc,
133 };
134 
135 static struct clk pllc2_clk = {
136  .ops = &pllc2_clk_ops,
137  .flags = CLK_ENABLE_ON_INIT,
138  .parent = &extalb1_div2_clk,
139 };
140 
141 static struct clk *main_clks[] = {
142  &r_clk,
145  &extalb1_div2_clk,
146  &extal2_div2_clk,
147  &pllc1_clk,
148  &pllc1_div2_clk,
149  &pllc2_clk,
150 };
151 
152 static void div4_kick(struct clk *clk)
153 {
154  unsigned long value;
155 
156  /* set KICK bit in SYFRQCR to update hardware setting */
157  value = __raw_readl(SYFRQCR);
158  value |= (1 << 31);
159  __raw_writel(value, SYFRQCR);
160 }
161 
162 static int divisors[] = { 2, 3, 4, 6, 8, 12, 16, 18,
163  24, 32, 36, 48, 0, 72, 0, 0 };
164 
165 static struct clk_div_mult_table div4_div_mult_table = {
166  .divisors = divisors,
167  .nr_divisors = ARRAY_SIZE(divisors),
168 };
169 
170 static struct clk_div4_table div4_table = {
171  .div_mult_table = &div4_div_mult_table,
172  .kick = div4_kick,
173 };
174 
178 
179 #define DIV4(_reg, _bit, _mask, _flags) \
180  SH_CLK_DIV4(&pllc1_clk, _reg, _bit, _mask, _flags)
181 
182 static struct clk div4_clks[DIV4_NR] = {
183  [DIV4_I] = DIV4(RTFRQCR, 20, 0x6fff, CLK_ENABLE_ON_INIT),
184  [DIV4_G] = DIV4(RTFRQCR, 16, 0x6fff, CLK_ENABLE_ON_INIT),
185  [DIV4_S] = DIV4(RTFRQCR, 12, 0x6fff, CLK_ENABLE_ON_INIT),
186  [DIV4_B] = DIV4(RTFRQCR, 8, 0x6fff, CLK_ENABLE_ON_INIT),
187  [DIV4_ZX] = DIV4(SYFRQCR, 20, 0x6fff, 0),
188  [DIV4_ZT] = DIV4(SYFRQCR, 16, 0x6fff, 0),
189  [DIV4_Z] = DIV4(SYFRQCR, 12, 0x6fff, 0),
190  [DIV4_ZD] = DIV4(SYFRQCR, 8, 0x6fff, 0),
191  [DIV4_HP] = DIV4(SYFRQCR, 4, 0x6fff, 0),
192  [DIV4_ZS] = DIV4(CMFRQCR, 12, 0x6fff, 0),
193  [DIV4_ZB] = DIV4(CMFRQCR, 8, 0x6fff, 0),
194  [DIV4_ZB3] = DIV4(CMFRQCR, 4, 0x6fff, 0),
195  [DIV4_CP] = DIV4(CMFRQCR, 0, 0x6fff, 0),
196 };
197 
202 
203 static struct clk div6_clks[DIV6_NR] = {
204  [DIV6_SUB] = SH_CLK_DIV6(&sh7367_extal2_clk, SUBUSBCKCR, 0),
205  [DIV6_SIUA] = SH_CLK_DIV6(&pllc1_div2_clk, SCLKACR, 0),
206  [DIV6_SIUB] = SH_CLK_DIV6(&pllc1_div2_clk, SCLKBCR, 0),
207  [DIV6_MSU] = SH_CLK_DIV6(&pllc1_div2_clk, MSUCKCR, 0),
208  [DIV6_SPU] = SH_CLK_DIV6(&pllc1_div2_clk, SPUCKCR, 0),
209  [DIV6_MVI3] = SH_CLK_DIV6(&pllc1_div2_clk, MVI3CKCR, 0),
210  [DIV6_MF1] = SH_CLK_DIV6(&pllc1_div2_clk, MFCK1CR, 0),
211  [DIV6_MF2] = SH_CLK_DIV6(&pllc1_div2_clk, MFCK2CR, 0),
212  [DIV6_VCK1] = SH_CLK_DIV6(&pllc1_div2_clk, VCLKCR1, 0),
213  [DIV6_VCK2] = SH_CLK_DIV6(&pllc1_div2_clk, VCLKCR2, 0),
214  [DIV6_VCK3] = SH_CLK_DIV6(&pllc1_div2_clk, VCLKCR3, 0),
215  [DIV6_VOU] = SH_CLK_DIV6(&pllc1_div2_clk, VOUCKCR, 0),
216 };
217 
218 enum { RTMSTP001,
227 
228 #define MSTP(_parent, _reg, _bit, _flags) \
229  SH_CLK_MSTP32(_parent, _reg, _bit, _flags)
230 
231 static struct clk mstp_clks[MSTP_NR] = {
232  [RTMSTP001] = MSTP(&div6_clks[DIV6_SUB], RTMSTPCR0, 1, 0), /* IIC2 */
233  [RTMSTP231] = MSTP(&div4_clks[DIV4_B], RTMSTPCR2, 31, 0), /* VEU3 */
234  [RTMSTP230] = MSTP(&div4_clks[DIV4_B], RTMSTPCR2, 30, 0), /* VEU2 */
235  [RTMSTP229] = MSTP(&div4_clks[DIV4_B], RTMSTPCR2, 29, 0), /* VEU1 */
236  [RTMSTP228] = MSTP(&div4_clks[DIV4_B], RTMSTPCR2, 28, 0), /* VEU0 */
237  [RTMSTP226] = MSTP(&div4_clks[DIV4_B], RTMSTPCR2, 26, 0), /* VEU2H */
238  [RTMSTP216] = MSTP(&div6_clks[DIV6_SUB], RTMSTPCR2, 16, 0), /* IIC0 */
239  [RTMSTP206] = MSTP(&div4_clks[DIV4_B], RTMSTPCR2, 6, 0), /* JPU */
240  [RTMSTP205] = MSTP(&div6_clks[DIV6_VOU], RTMSTPCR2, 5, 0), /* VOU */
241  [RTMSTP201] = MSTP(&div4_clks[DIV4_B], RTMSTPCR2, 1, 0), /* VPU */
242  [SYMSTP023] = MSTP(&div6_clks[DIV6_SPU], SYMSTPCR0, 23, 0), /* SPU1 */
243  [SYMSTP007] = MSTP(&div6_clks[DIV6_SUB], SYMSTPCR0, 7, 0), /* SCIFA5 */
244  [SYMSTP006] = MSTP(&div6_clks[DIV6_SUB], SYMSTPCR0, 6, 0), /* SCIFB */
245  [SYMSTP004] = MSTP(&div6_clks[DIV6_SUB], SYMSTPCR0, 4, 0), /* SCIFA0 */
246  [SYMSTP003] = MSTP(&div6_clks[DIV6_SUB], SYMSTPCR0, 3, 0), /* SCIFA1 */
247  [SYMSTP002] = MSTP(&div6_clks[DIV6_SUB], SYMSTPCR0, 2, 0), /* SCIFA2 */
248  [SYMSTP001] = MSTP(&div6_clks[DIV6_SUB], SYMSTPCR0, 1, 0), /* SCIFA3 */
249  [SYMSTP000] = MSTP(&div6_clks[DIV6_SUB], SYMSTPCR0, 0, 0), /* SCIFA4 */
250  [SYMSTP231] = MSTP(&div6_clks[DIV6_SUB], SYMSTPCR2, 31, 0), /* SIU */
251  [SYMSTP229] = MSTP(&r_clk, SYMSTPCR2, 29, 0), /* CMT10 */
252  [SYMSTP225] = MSTP(&div6_clks[DIV6_SUB], SYMSTPCR2, 25, 0), /* IRDA */
253  [SYMSTP223] = MSTP(&div6_clks[DIV6_SUB], SYMSTPCR2, 23, 0), /* IIC1 */
254  [SYMSTP222] = MSTP(&div6_clks[DIV6_SUB], SYMSTPCR2, 22, 0), /* USBHS */
255  [SYMSTP215] = MSTP(&div4_clks[DIV4_HP], SYMSTPCR2, 15, 0), /* FLCTL */
256  [SYMSTP214] = MSTP(&div4_clks[DIV4_HP], SYMSTPCR2, 14, 0), /* SDHI0 */
257  [SYMSTP213] = MSTP(&div4_clks[DIV4_HP], SYMSTPCR2, 13, 0), /* SDHI1 */
258  [SYMSTP211] = MSTP(&div4_clks[DIV4_HP], SYMSTPCR2, 11, 0), /* SDHI2 */
259  [CMMSTP003] = MSTP(&r_clk, CMMSTPCR0, 3, 0), /* KEYSC */
260 };
261 
262 static struct clk_lookup lookups[] = {
263  /* main clocks */
264  CLKDEV_CON_ID("r_clk", &r_clk),
265  CLKDEV_CON_ID("extalb1", &sh7367_extalb1_clk),
266  CLKDEV_CON_ID("extal2", &sh7367_extal2_clk),
267  CLKDEV_CON_ID("extalb1_div2_clk", &extalb1_div2_clk),
268  CLKDEV_CON_ID("extal2_div2_clk", &extal2_div2_clk),
269  CLKDEV_CON_ID("pllc1_clk", &pllc1_clk),
270  CLKDEV_CON_ID("pllc1_div2_clk", &pllc1_div2_clk),
271  CLKDEV_CON_ID("pllc2_clk", &pllc2_clk),
272 
273  /* DIV4 clocks */
274  CLKDEV_CON_ID("i_clk", &div4_clks[DIV4_I]),
275  CLKDEV_CON_ID("g_clk", &div4_clks[DIV4_G]),
276  CLKDEV_CON_ID("b_clk", &div4_clks[DIV4_B]),
277  CLKDEV_CON_ID("zx_clk", &div4_clks[DIV4_ZX]),
278  CLKDEV_CON_ID("zt_clk", &div4_clks[DIV4_ZT]),
279  CLKDEV_CON_ID("z_clk", &div4_clks[DIV4_Z]),
280  CLKDEV_CON_ID("zd_clk", &div4_clks[DIV4_ZD]),
281  CLKDEV_CON_ID("hp_clk", &div4_clks[DIV4_HP]),
282  CLKDEV_CON_ID("zs_clk", &div4_clks[DIV4_ZS]),
283  CLKDEV_CON_ID("zb_clk", &div4_clks[DIV4_ZB]),
284  CLKDEV_CON_ID("zb3_clk", &div4_clks[DIV4_ZB3]),
285  CLKDEV_CON_ID("cp_clk", &div4_clks[DIV4_CP]),
286 
287  /* DIV6 clocks */
288  CLKDEV_CON_ID("sub_clk", &div6_clks[DIV6_SUB]),
289  CLKDEV_CON_ID("siua_clk", &div6_clks[DIV6_SIUA]),
290  CLKDEV_CON_ID("siub_clk", &div6_clks[DIV6_SIUB]),
291  CLKDEV_CON_ID("msu_clk", &div6_clks[DIV6_MSU]),
292  CLKDEV_CON_ID("spu_clk", &div6_clks[DIV6_SPU]),
293  CLKDEV_CON_ID("mvi3_clk", &div6_clks[DIV6_MVI3]),
294  CLKDEV_CON_ID("mf1_clk", &div6_clks[DIV6_MF1]),
295  CLKDEV_CON_ID("mf2_clk", &div6_clks[DIV6_MF2]),
296  CLKDEV_CON_ID("vck1_clk", &div6_clks[DIV6_VCK1]),
297  CLKDEV_CON_ID("vck2_clk", &div6_clks[DIV6_VCK2]),
298  CLKDEV_CON_ID("vck3_clk", &div6_clks[DIV6_VCK3]),
299  CLKDEV_CON_ID("vou_clk", &div6_clks[DIV6_VOU]),
300 
301  /* MSTP32 clocks */
302  CLKDEV_DEV_ID("i2c-sh_mobile.2", &mstp_clks[RTMSTP001]), /* IIC2 */
303  CLKDEV_DEV_ID("uio_pdrv_genirq.4", &mstp_clks[RTMSTP231]), /* VEU3 */
304  CLKDEV_DEV_ID("uio_pdrv_genirq.3", &mstp_clks[RTMSTP230]), /* VEU2 */
305  CLKDEV_DEV_ID("uio_pdrv_genirq.2", &mstp_clks[RTMSTP229]), /* VEU1 */
306  CLKDEV_DEV_ID("uio_pdrv_genirq.1", &mstp_clks[RTMSTP228]), /* VEU0 */
307  CLKDEV_DEV_ID("uio_pdrv_genirq.5", &mstp_clks[RTMSTP226]), /* VEU2H */
308  CLKDEV_DEV_ID("i2c-sh_mobile.0", &mstp_clks[RTMSTP216]), /* IIC0 */
309  CLKDEV_DEV_ID("uio_pdrv_genirq.6", &mstp_clks[RTMSTP206]), /* JPU */
310  CLKDEV_DEV_ID("sh-vou", &mstp_clks[RTMSTP205]), /* VOU */
311  CLKDEV_DEV_ID("uio_pdrv_genirq.0", &mstp_clks[RTMSTP201]), /* VPU */
312  CLKDEV_DEV_ID("uio_pdrv_genirq.7", &mstp_clks[SYMSTP023]), /* SPU1 */
313  CLKDEV_DEV_ID("sh-sci.5", &mstp_clks[SYMSTP007]), /* SCIFA5 */
314  CLKDEV_DEV_ID("sh-sci.6", &mstp_clks[SYMSTP006]), /* SCIFB */
315  CLKDEV_DEV_ID("sh-sci.0", &mstp_clks[SYMSTP004]), /* SCIFA0 */
316  CLKDEV_DEV_ID("sh-sci.1", &mstp_clks[SYMSTP003]), /* SCIFA1 */
317  CLKDEV_DEV_ID("sh-sci.2", &mstp_clks[SYMSTP002]), /* SCIFA2 */
318  CLKDEV_DEV_ID("sh-sci.3", &mstp_clks[SYMSTP001]), /* SCIFA3 */
319  CLKDEV_DEV_ID("sh-sci.4", &mstp_clks[SYMSTP000]), /* SCIFA4 */
320  CLKDEV_DEV_ID("sh_siu", &mstp_clks[SYMSTP231]), /* SIU */
321  CLKDEV_DEV_ID("sh_cmt.10", &mstp_clks[SYMSTP229]), /* CMT10 */
322  CLKDEV_DEV_ID("sh_irda", &mstp_clks[SYMSTP225]), /* IRDA */
323  CLKDEV_DEV_ID("i2c-sh_mobile.1", &mstp_clks[SYMSTP223]), /* IIC1 */
324  CLKDEV_DEV_ID("r8a66597_hcd.0", &mstp_clks[SYMSTP222]), /* USBHS */
325  CLKDEV_DEV_ID("r8a66597_udc.0", &mstp_clks[SYMSTP222]), /* USBHS */
326  CLKDEV_DEV_ID("sh_flctl", &mstp_clks[SYMSTP215]), /* FLCTL */
327  CLKDEV_DEV_ID("sh_mobile_sdhi.0", &mstp_clks[SYMSTP214]), /* SDHI0 */
328  CLKDEV_DEV_ID("sh_mobile_sdhi.1", &mstp_clks[SYMSTP213]), /* SDHI1 */
329  CLKDEV_DEV_ID("sh_mobile_sdhi.2", &mstp_clks[SYMSTP211]), /* SDHI2 */
330  CLKDEV_DEV_ID("sh_keysc.0", &mstp_clks[CMMSTP003]), /* KEYSC */
331 };
332 
334 {
335  int k, ret = 0;
336 
337  for (k = 0; !ret && (k < ARRAY_SIZE(main_clks)); k++)
338  ret = clk_register(main_clks[k]);
339 
340  if (!ret)
341  ret = sh_clk_div4_register(div4_clks, DIV4_NR, &div4_table);
342 
343  if (!ret)
344  ret = sh_clk_div6_register(div6_clks, DIV6_NR);
345 
346  if (!ret)
347  ret = sh_clk_mstp_register(mstp_clks, MSTP_NR);
348 
349  clkdev_add_table(lookups, ARRAY_SIZE(lookups));
350 
351  if (!ret)
353  else
354  panic("failed to setup sh7367 clocks\n");
355 }