1 // SPDX-License-Identifier: GPL-2.0
2 /*
3 * arch/sh/kernel/cpu/sh4a/clock-sh7724.c
4 *
5 * SH7724 clock framework support
6 *
7 * Copyright (C) 2009 Magnus Damm
8 */
9 #include <linux/init.h>
10 #include <linux/kernel.h>
11 #include <linux/io.h>
12 #include <linux/clk.h>
13 #include <linux/clkdev.h>
14 #include <linux/sh_clk.h>
15 #include <asm/clock.h>
16 #include <cpu/sh7724.h>
17
18 /* SH7724 registers */
19 #define FRQCRA 0xa4150000
20 #define FRQCRB 0xa4150004
21 #define VCLKCR 0xa4150048
22 #define FCLKACR 0xa4150008
23 #define FCLKBCR 0xa415000c
24 #define IRDACLKCR 0xa4150018
25 #define PLLCR 0xa4150024
26 #define MSTPCR0 0xa4150030
27 #define MSTPCR1 0xa4150034
28 #define MSTPCR2 0xa4150038
29 #define SPUCLKCR 0xa415003c
30 #define FLLFRQ 0xa4150050
31 #define LSTATS 0xa4150060
32
33 /* Fixed 32 KHz root clock for RTC and Power Management purposes */
34 static struct clk r_clk = {
35 .rate = 32768,
36 };
37
38 /*
39 * Default rate for the root input clock, reset this with clk_set_rate()
40 * from the platform code.
41 */
42 static struct clk extal_clk = {
43 .rate = 33333333,
44 };
45
46 /* The fll multiplies the 32khz r_clk, may be used instead of extal */
fll_recalc(struct clk * clk)47 static unsigned long fll_recalc(struct clk *clk)
48 {
49 unsigned long mult = 0;
50 unsigned long div = 1;
51
52 if (__raw_readl(PLLCR) & 0x1000)
53 mult = __raw_readl(FLLFRQ) & 0x3ff;
54
55 if (__raw_readl(FLLFRQ) & 0x4000)
56 div = 2;
57
58 return (clk->parent->rate * mult) / div;
59 }
60
61 static struct sh_clk_ops fll_clk_ops = {
62 .recalc = fll_recalc,
63 };
64
65 static struct clk fll_clk = {
66 .ops = &fll_clk_ops,
67 .parent = &r_clk,
68 .flags = CLK_ENABLE_ON_INIT,
69 };
70
pll_recalc(struct clk * clk)71 static unsigned long pll_recalc(struct clk *clk)
72 {
73 unsigned long mult = 1;
74
75 if (__raw_readl(PLLCR) & 0x4000)
76 mult = (((__raw_readl(FRQCRA) >> 24) & 0x3f) + 1) * 2;
77
78 return clk->parent->rate * mult;
79 }
80
81 static struct sh_clk_ops pll_clk_ops = {
82 .recalc = pll_recalc,
83 };
84
85 static struct clk pll_clk = {
86 .ops = &pll_clk_ops,
87 .flags = CLK_ENABLE_ON_INIT,
88 };
89
90 /* A fixed divide-by-3 block use by the div6 clocks */
div3_recalc(struct clk * clk)91 static unsigned long div3_recalc(struct clk *clk)
92 {
93 return clk->parent->rate / 3;
94 }
95
96 static struct sh_clk_ops div3_clk_ops = {
97 .recalc = div3_recalc,
98 };
99
100 static struct clk div3_clk = {
101 .ops = &div3_clk_ops,
102 .parent = &pll_clk,
103 };
104
105 /* External input clock (pin name: FSIMCKA/FSIMCKB/DV_CLKI ) */
106 struct clk sh7724_fsimcka_clk = {
107 };
108
109 struct clk sh7724_fsimckb_clk = {
110 };
111
112 struct clk sh7724_dv_clki = {
113 };
114
115 static struct clk *main_clks[] = {
116 &r_clk,
117 &extal_clk,
118 &fll_clk,
119 &pll_clk,
120 &div3_clk,
121 &sh7724_fsimcka_clk,
122 &sh7724_fsimckb_clk,
123 &sh7724_dv_clki,
124 };
125
div4_kick(struct clk * clk)126 static void div4_kick(struct clk *clk)
127 {
128 unsigned long value;
129
130 /* set KICK bit in FRQCRA to update hardware setting */
131 value = __raw_readl(FRQCRA);
132 value |= (1 << 31);
133 __raw_writel(value, FRQCRA);
134 }
135
136 static int divisors[] = { 2, 3, 4, 6, 8, 12, 16, 0, 24, 32, 36, 48, 0, 72 };
137
138 static struct clk_div_mult_table div4_div_mult_table = {
139 .divisors = divisors,
140 .nr_divisors = ARRAY_SIZE(divisors),
141 };
142
143 static struct clk_div4_table div4_table = {
144 .div_mult_table = &div4_div_mult_table,
145 .kick = div4_kick,
146 };
147
148 enum { DIV4_I, DIV4_SH, DIV4_B, DIV4_P, DIV4_M1, DIV4_NR };
149
150 #define DIV4(_reg, _bit, _mask, _flags) \
151 SH_CLK_DIV4(&pll_clk, _reg, _bit, _mask, _flags)
152
153 struct clk div4_clks[DIV4_NR] = {
154 [DIV4_I] = DIV4(FRQCRA, 20, 0x2f7d, CLK_ENABLE_ON_INIT),
155 [DIV4_SH] = DIV4(FRQCRA, 12, 0x2f7c, CLK_ENABLE_ON_INIT),
156 [DIV4_B] = DIV4(FRQCRA, 8, 0x2f7c, CLK_ENABLE_ON_INIT),
157 [DIV4_P] = DIV4(FRQCRA, 0, 0x2f7c, 0),
158 [DIV4_M1] = DIV4(FRQCRB, 4, 0x2f7c, CLK_ENABLE_ON_INIT),
159 };
160
161 enum { DIV6_V, DIV6_I, DIV6_S, DIV6_FA, DIV6_FB, DIV6_NR };
162
163 /* Indices are important - they are the actual src selecting values */
164 static struct clk *common_parent[] = {
165 [0] = &div3_clk,
166 [1] = NULL,
167 };
168
169 static struct clk *vclkcr_parent[8] = {
170 [0] = &div3_clk,
171 [2] = &sh7724_dv_clki,
172 [4] = &extal_clk,
173 };
174
175 static struct clk *fclkacr_parent[] = {
176 [0] = &div3_clk,
177 [1] = NULL,
178 [2] = &sh7724_fsimcka_clk,
179 [3] = NULL,
180 };
181
182 static struct clk *fclkbcr_parent[] = {
183 [0] = &div3_clk,
184 [1] = NULL,
185 [2] = &sh7724_fsimckb_clk,
186 [3] = NULL,
187 };
188
189 static struct clk div6_clks[DIV6_NR] = {
190 [DIV6_V] = SH_CLK_DIV6_EXT(VCLKCR, 0,
191 vclkcr_parent, ARRAY_SIZE(vclkcr_parent), 12, 3),
192 [DIV6_I] = SH_CLK_DIV6_EXT(IRDACLKCR, 0,
193 common_parent, ARRAY_SIZE(common_parent), 6, 1),
194 [DIV6_S] = SH_CLK_DIV6_EXT(SPUCLKCR, CLK_ENABLE_ON_INIT,
195 common_parent, ARRAY_SIZE(common_parent), 6, 1),
196 [DIV6_FA] = SH_CLK_DIV6_EXT(FCLKACR, 0,
197 fclkacr_parent, ARRAY_SIZE(fclkacr_parent), 6, 2),
198 [DIV6_FB] = SH_CLK_DIV6_EXT(FCLKBCR, 0,
199 fclkbcr_parent, ARRAY_SIZE(fclkbcr_parent), 6, 2),
200 };
201
202 static struct clk mstp_clks[HWBLK_NR] = {
203 [HWBLK_TLB] = SH_CLK_MSTP32(&div4_clks[DIV4_I], MSTPCR0, 31, CLK_ENABLE_ON_INIT),
204 [HWBLK_IC] = SH_CLK_MSTP32(&div4_clks[DIV4_I], MSTPCR0, 30, CLK_ENABLE_ON_INIT),
205 [HWBLK_OC] = SH_CLK_MSTP32(&div4_clks[DIV4_I], MSTPCR0, 29, CLK_ENABLE_ON_INIT),
206 [HWBLK_RSMEM] = SH_CLK_MSTP32(&div4_clks[DIV4_B], MSTPCR0, 28, CLK_ENABLE_ON_INIT),
207 [HWBLK_ILMEM] = SH_CLK_MSTP32(&div4_clks[DIV4_I], MSTPCR0, 27, CLK_ENABLE_ON_INIT),
208 [HWBLK_L2C] = SH_CLK_MSTP32(&div4_clks[DIV4_SH], MSTPCR0, 26, CLK_ENABLE_ON_INIT),
209 [HWBLK_FPU] = SH_CLK_MSTP32(&div4_clks[DIV4_I], MSTPCR0, 24, CLK_ENABLE_ON_INIT),
210 [HWBLK_INTC] = SH_CLK_MSTP32(&div4_clks[DIV4_P], MSTPCR0, 22, CLK_ENABLE_ON_INIT),
211 [HWBLK_DMAC0] = SH_CLK_MSTP32(&div4_clks[DIV4_B], MSTPCR0, 21, 0),
212 [HWBLK_SHYWAY] = SH_CLK_MSTP32(&div4_clks[DIV4_SH], MSTPCR0, 20, CLK_ENABLE_ON_INIT),
213 [HWBLK_HUDI] = SH_CLK_MSTP32(&div4_clks[DIV4_P], MSTPCR0, 19, 0),
214 [HWBLK_UBC] = SH_CLK_MSTP32(&div4_clks[DIV4_I], MSTPCR0, 17, 0),
215 [HWBLK_TMU0] = SH_CLK_MSTP32(&div4_clks[DIV4_P], MSTPCR0, 15, 0),
216 [HWBLK_CMT] = SH_CLK_MSTP32(&r_clk, MSTPCR0, 14, 0),
217 [HWBLK_RWDT] = SH_CLK_MSTP32(&r_clk, MSTPCR0, 13, 0),
218 [HWBLK_DMAC1] = SH_CLK_MSTP32(&div4_clks[DIV4_B], MSTPCR0, 12, 0),
219 [HWBLK_TMU1] = SH_CLK_MSTP32(&div4_clks[DIV4_P], MSTPCR0, 10, 0),
220 [HWBLK_SCIF0] = SH_CLK_MSTP32(&div4_clks[DIV4_P], MSTPCR0, 9, 0),
221 [HWBLK_SCIF1] = SH_CLK_MSTP32(&div4_clks[DIV4_P], MSTPCR0, 8, 0),
222 [HWBLK_SCIF2] = SH_CLK_MSTP32(&div4_clks[DIV4_P], MSTPCR0, 7, 0),
223 [HWBLK_SCIF3] = SH_CLK_MSTP32(&div4_clks[DIV4_B], MSTPCR0, 6, 0),
224 [HWBLK_SCIF4] = SH_CLK_MSTP32(&div4_clks[DIV4_B], MSTPCR0, 5, 0),
225 [HWBLK_SCIF5] = SH_CLK_MSTP32(&div4_clks[DIV4_B], MSTPCR0, 4, 0),
226 [HWBLK_MSIOF0] = SH_CLK_MSTP32(&div4_clks[DIV4_B], MSTPCR0, 2, 0),
227 [HWBLK_MSIOF1] = SH_CLK_MSTP32(&div4_clks[DIV4_B], MSTPCR0, 1, 0),
228
229 [HWBLK_KEYSC] = SH_CLK_MSTP32(&r_clk, MSTPCR1, 12, 0),
230 [HWBLK_RTC] = SH_CLK_MSTP32(&r_clk, MSTPCR1, 11, 0),
231 [HWBLK_IIC0] = SH_CLK_MSTP32(&div4_clks[DIV4_P], MSTPCR1, 9, 0),
232 [HWBLK_IIC1] = SH_CLK_MSTP32(&div4_clks[DIV4_P], MSTPCR1, 8, 0),
233
234 [HWBLK_MMC] = SH_CLK_MSTP32(&div4_clks[DIV4_B], MSTPCR2, 29, 0),
235 [HWBLK_ETHER] = SH_CLK_MSTP32(&div4_clks[DIV4_B], MSTPCR2, 28, 0),
236 [HWBLK_ATAPI] = SH_CLK_MSTP32(&div4_clks[DIV4_B], MSTPCR2, 26, 0),
237 [HWBLK_TPU] = SH_CLK_MSTP32(&div4_clks[DIV4_B], MSTPCR2, 25, 0),
238 [HWBLK_IRDA] = SH_CLK_MSTP32(&div4_clks[DIV4_P], MSTPCR2, 24, 0),
239 [HWBLK_TSIF] = SH_CLK_MSTP32(&div4_clks[DIV4_B], MSTPCR2, 22, 0),
240 [HWBLK_USB1] = SH_CLK_MSTP32(&div4_clks[DIV4_B], MSTPCR2, 21, 0),
241 [HWBLK_USB0] = SH_CLK_MSTP32(&div4_clks[DIV4_B], MSTPCR2, 20, 0),
242 [HWBLK_2DG] = SH_CLK_MSTP32(&div4_clks[DIV4_B], MSTPCR2, 19, 0),
243 [HWBLK_SDHI0] = SH_CLK_MSTP32(&div4_clks[DIV4_B], MSTPCR2, 18, 0),
244 [HWBLK_SDHI1] = SH_CLK_MSTP32(&div4_clks[DIV4_B], MSTPCR2, 17, 0),
245 [HWBLK_VEU1] = SH_CLK_MSTP32(&div4_clks[DIV4_B], MSTPCR2, 15, 0),
246 [HWBLK_CEU1] = SH_CLK_MSTP32(&div4_clks[DIV4_B], MSTPCR2, 13, 0),
247 [HWBLK_BEU1] = SH_CLK_MSTP32(&div4_clks[DIV4_B], MSTPCR2, 12, 0),
248 [HWBLK_2DDMAC] = SH_CLK_MSTP32(&div4_clks[DIV4_SH], MSTPCR2, 10, 0),
249 [HWBLK_SPU] = SH_CLK_MSTP32(&div4_clks[DIV4_B], MSTPCR2, 9, 0),
250 [HWBLK_JPU] = SH_CLK_MSTP32(&div4_clks[DIV4_B], MSTPCR2, 6, 0),
251 [HWBLK_VOU] = SH_CLK_MSTP32(&div4_clks[DIV4_B], MSTPCR2, 5, 0),
252 [HWBLK_BEU0] = SH_CLK_MSTP32(&div4_clks[DIV4_B], MSTPCR2, 4, 0),
253 [HWBLK_CEU0] = SH_CLK_MSTP32(&div4_clks[DIV4_B], MSTPCR2, 3, 0),
254 [HWBLK_VEU0] = SH_CLK_MSTP32(&div4_clks[DIV4_B], MSTPCR2, 2, 0),
255 [HWBLK_VPU] = SH_CLK_MSTP32(&div4_clks[DIV4_B], MSTPCR2, 1, 0),
256 [HWBLK_LCDC] = SH_CLK_MSTP32(&div4_clks[DIV4_B], MSTPCR2, 0, 0),
257 };
258
259 static struct clk_lookup lookups[] = {
260 /* main clocks */
261 CLKDEV_CON_ID("rclk", &r_clk),
262 CLKDEV_CON_ID("extal", &extal_clk),
263 CLKDEV_CON_ID("fll_clk", &fll_clk),
264 CLKDEV_CON_ID("pll_clk", &pll_clk),
265 CLKDEV_CON_ID("div3_clk", &div3_clk),
266
267 /* DIV4 clocks */
268 CLKDEV_CON_ID("cpu_clk", &div4_clks[DIV4_I]),
269 CLKDEV_CON_ID("shyway_clk", &div4_clks[DIV4_SH]),
270 CLKDEV_CON_ID("bus_clk", &div4_clks[DIV4_B]),
271 CLKDEV_CON_ID("peripheral_clk", &div4_clks[DIV4_P]),
272 CLKDEV_CON_ID("vpu_clk", &div4_clks[DIV4_M1]),
273
274 /* DIV6 clocks */
275 CLKDEV_CON_ID("video_clk", &div6_clks[DIV6_V]),
276 CLKDEV_CON_ID("fsia_clk", &div6_clks[DIV6_FA]),
277 CLKDEV_CON_ID("fsib_clk", &div6_clks[DIV6_FB]),
278 CLKDEV_CON_ID("irda_clk", &div6_clks[DIV6_I]),
279 CLKDEV_CON_ID("spu_clk", &div6_clks[DIV6_S]),
280
281 /* MSTP clocks */
282 CLKDEV_CON_ID("tlb0", &mstp_clks[HWBLK_TLB]),
283 CLKDEV_CON_ID("ic0", &mstp_clks[HWBLK_IC]),
284 CLKDEV_CON_ID("oc0", &mstp_clks[HWBLK_OC]),
285 CLKDEV_CON_ID("rs0", &mstp_clks[HWBLK_RSMEM]),
286 CLKDEV_CON_ID("ilmem0", &mstp_clks[HWBLK_ILMEM]),
287 CLKDEV_CON_ID("l2c0", &mstp_clks[HWBLK_L2C]),
288 CLKDEV_CON_ID("fpu0", &mstp_clks[HWBLK_FPU]),
289 CLKDEV_CON_ID("intc0", &mstp_clks[HWBLK_INTC]),
290 CLKDEV_DEV_ID("sh-dma-engine.0", &mstp_clks[HWBLK_DMAC0]),
291 CLKDEV_CON_ID("sh0", &mstp_clks[HWBLK_SHYWAY]),
292 CLKDEV_CON_ID("hudi0", &mstp_clks[HWBLK_HUDI]),
293 CLKDEV_CON_ID("ubc0", &mstp_clks[HWBLK_UBC]),
294
295 CLKDEV_ICK_ID("fck", "sh-tmu.0", &mstp_clks[HWBLK_TMU0]),
296 CLKDEV_ICK_ID("fck", "sh-tmu.1", &mstp_clks[HWBLK_TMU1]),
297
298 CLKDEV_ICK_ID("fck", "sh-cmt-32.0", &mstp_clks[HWBLK_CMT]),
299 CLKDEV_DEV_ID("sh-wdt.0", &mstp_clks[HWBLK_RWDT]),
300 CLKDEV_DEV_ID("sh-dma-engine.1", &mstp_clks[HWBLK_DMAC1]),
301
302 CLKDEV_DEV_ID("sh-sci.0", &mstp_clks[HWBLK_SCIF0]),
303 CLKDEV_DEV_ID("sh-sci.1", &mstp_clks[HWBLK_SCIF1]),
304 CLKDEV_DEV_ID("sh-sci.2", &mstp_clks[HWBLK_SCIF2]),
305 CLKDEV_DEV_ID("sh-sci.3", &mstp_clks[HWBLK_SCIF3]),
306 CLKDEV_DEV_ID("sh-sci.4", &mstp_clks[HWBLK_SCIF4]),
307 CLKDEV_DEV_ID("sh-sci.5", &mstp_clks[HWBLK_SCIF5]),
308
309 CLKDEV_DEV_ID("spi_sh_msiof.0", &mstp_clks[HWBLK_MSIOF0]),
310 CLKDEV_DEV_ID("spi_sh_msiof.1", &mstp_clks[HWBLK_MSIOF1]),
311 CLKDEV_DEV_ID("sh_keysc.0", &mstp_clks[HWBLK_KEYSC]),
312 CLKDEV_CON_ID("rtc0", &mstp_clks[HWBLK_RTC]),
313 CLKDEV_DEV_ID("i2c-sh_mobile.0", &mstp_clks[HWBLK_IIC0]),
314 CLKDEV_DEV_ID("i2c-sh_mobile.1", &mstp_clks[HWBLK_IIC1]),
315 CLKDEV_DEV_ID("sh_mmcif.0", &mstp_clks[HWBLK_MMC]),
316 CLKDEV_DEV_ID("sh7724-ether.0", &mstp_clks[HWBLK_ETHER]),
317 CLKDEV_CON_ID("atapi0", &mstp_clks[HWBLK_ATAPI]),
318 CLKDEV_CON_ID("tpu0", &mstp_clks[HWBLK_TPU]),
319 CLKDEV_CON_ID("irda0", &mstp_clks[HWBLK_IRDA]),
320 CLKDEV_CON_ID("tsif0", &mstp_clks[HWBLK_TSIF]),
321 CLKDEV_DEV_ID("renesas_usbhs.1", &mstp_clks[HWBLK_USB1]),
322 CLKDEV_DEV_ID("renesas_usbhs.0", &mstp_clks[HWBLK_USB0]),
323 CLKDEV_CON_ID("usb1", &mstp_clks[HWBLK_USB1]),
324 CLKDEV_CON_ID("usb0", &mstp_clks[HWBLK_USB0]),
325 CLKDEV_CON_ID("2dg0", &mstp_clks[HWBLK_2DG]),
326 CLKDEV_DEV_ID("sh_mobile_sdhi.0", &mstp_clks[HWBLK_SDHI0]),
327 CLKDEV_DEV_ID("sh_mobile_sdhi.1", &mstp_clks[HWBLK_SDHI1]),
328 CLKDEV_CON_ID("veu1", &mstp_clks[HWBLK_VEU1]),
329 CLKDEV_DEV_ID("renesas-ceu.1", &mstp_clks[HWBLK_CEU1]),
330 CLKDEV_CON_ID("beu1", &mstp_clks[HWBLK_BEU1]),
331 CLKDEV_CON_ID("2ddmac0", &mstp_clks[HWBLK_2DDMAC]),
332 CLKDEV_DEV_ID("sh_fsi.0", &mstp_clks[HWBLK_SPU]),
333 CLKDEV_CON_ID("jpu0", &mstp_clks[HWBLK_JPU]),
334 CLKDEV_DEV_ID("sh-vou", &mstp_clks[HWBLK_VOU]),
335 CLKDEV_CON_ID("beu0", &mstp_clks[HWBLK_BEU0]),
336 CLKDEV_DEV_ID("renesas-ceu.0", &mstp_clks[HWBLK_CEU0]),
337 CLKDEV_CON_ID("veu0", &mstp_clks[HWBLK_VEU0]),
338 CLKDEV_CON_ID("vpu0", &mstp_clks[HWBLK_VPU]),
339 CLKDEV_DEV_ID("sh_mobile_lcdc_fb.0", &mstp_clks[HWBLK_LCDC]),
340 };
341
arch_clk_init(void)342 int __init arch_clk_init(void)
343 {
344 int k, ret = 0;
345
346 /* autodetect extal or fll configuration */
347 if (__raw_readl(PLLCR) & 0x1000)
348 pll_clk.parent = &fll_clk;
349 else
350 pll_clk.parent = &extal_clk;
351
352 for (k = 0; !ret && (k < ARRAY_SIZE(main_clks)); k++)
353 ret = clk_register(main_clks[k]);
354
355 clkdev_add_table(lookups, ARRAY_SIZE(lookups));
356
357 if (!ret)
358 ret = sh_clk_div4_register(div4_clks, DIV4_NR, &div4_table);
359
360 if (!ret)
361 ret = sh_clk_div6_reparent_register(div6_clks, DIV6_NR);
362
363 if (!ret)
364 ret = sh_clk_mstp_register(mstp_clks, HWBLK_NR);
365
366 return ret;
367 }
368