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81ec9889 MS |
1 | /* |
2 | * Port on Texas Instruments TMS320C6x architecture | |
3 | * | |
4 | * Copyright (C) 2011 Texas Instruments Incorporated | |
5 | * Author: Mark Salter <msalter@redhat.com> | |
6 | * | |
7 | * This program is free software; you can redistribute it and/or modify | |
8 | * it under the terms of the GNU General Public License version 2 as | |
9 | * published by the Free Software Foundation. | |
10 | */ | |
11 | #include <linux/kernel.h> | |
12 | #include <linux/delay.h> | |
13 | #include <linux/errno.h> | |
14 | #include <linux/string.h> | |
15 | #include <linux/ioport.h> | |
16 | #include <linux/clkdev.h> | |
17 | #include <linux/of.h> | |
18 | #include <linux/of_address.h> | |
19 | ||
20 | #include <asm/clock.h> | |
21 | #include <asm/setup.h> | |
22 | #include <asm/irq.h> | |
23 | ||
24 | /* | |
25 | * Common SoC clock support. | |
26 | */ | |
27 | ||
28 | /* Default input for PLL1 */ | |
29 | struct clk clkin1 = { | |
30 | .name = "clkin1", | |
31 | .node = LIST_HEAD_INIT(clkin1.node), | |
32 | .children = LIST_HEAD_INIT(clkin1.children), | |
33 | .childnode = LIST_HEAD_INIT(clkin1.childnode), | |
34 | }; | |
35 | ||
36 | struct pll_data c6x_soc_pll1 = { | |
37 | .num = 1, | |
38 | .sysclks = { | |
39 | { | |
40 | .name = "pll1", | |
41 | .parent = &clkin1, | |
42 | .pll_data = &c6x_soc_pll1, | |
43 | .flags = CLK_PLL, | |
44 | }, | |
45 | { | |
46 | .name = "pll1_sysclk1", | |
47 | .parent = &c6x_soc_pll1.sysclks[0], | |
48 | .flags = CLK_PLL, | |
49 | }, | |
50 | { | |
51 | .name = "pll1_sysclk2", | |
52 | .parent = &c6x_soc_pll1.sysclks[0], | |
53 | .flags = CLK_PLL, | |
54 | }, | |
55 | { | |
56 | .name = "pll1_sysclk3", | |
57 | .parent = &c6x_soc_pll1.sysclks[0], | |
58 | .flags = CLK_PLL, | |
59 | }, | |
60 | { | |
61 | .name = "pll1_sysclk4", | |
62 | .parent = &c6x_soc_pll1.sysclks[0], | |
63 | .flags = CLK_PLL, | |
64 | }, | |
65 | { | |
66 | .name = "pll1_sysclk5", | |
67 | .parent = &c6x_soc_pll1.sysclks[0], | |
68 | .flags = CLK_PLL, | |
69 | }, | |
70 | { | |
71 | .name = "pll1_sysclk6", | |
72 | .parent = &c6x_soc_pll1.sysclks[0], | |
73 | .flags = CLK_PLL, | |
74 | }, | |
75 | { | |
76 | .name = "pll1_sysclk7", | |
77 | .parent = &c6x_soc_pll1.sysclks[0], | |
78 | .flags = CLK_PLL, | |
79 | }, | |
80 | { | |
81 | .name = "pll1_sysclk8", | |
82 | .parent = &c6x_soc_pll1.sysclks[0], | |
83 | .flags = CLK_PLL, | |
84 | }, | |
85 | { | |
86 | .name = "pll1_sysclk9", | |
87 | .parent = &c6x_soc_pll1.sysclks[0], | |
88 | .flags = CLK_PLL, | |
89 | }, | |
90 | { | |
91 | .name = "pll1_sysclk10", | |
92 | .parent = &c6x_soc_pll1.sysclks[0], | |
93 | .flags = CLK_PLL, | |
94 | }, | |
95 | { | |
96 | .name = "pll1_sysclk11", | |
97 | .parent = &c6x_soc_pll1.sysclks[0], | |
98 | .flags = CLK_PLL, | |
99 | }, | |
100 | { | |
101 | .name = "pll1_sysclk12", | |
102 | .parent = &c6x_soc_pll1.sysclks[0], | |
103 | .flags = CLK_PLL, | |
104 | }, | |
105 | { | |
106 | .name = "pll1_sysclk13", | |
107 | .parent = &c6x_soc_pll1.sysclks[0], | |
108 | .flags = CLK_PLL, | |
109 | }, | |
110 | { | |
111 | .name = "pll1_sysclk14", | |
112 | .parent = &c6x_soc_pll1.sysclks[0], | |
113 | .flags = CLK_PLL, | |
114 | }, | |
115 | { | |
116 | .name = "pll1_sysclk15", | |
117 | .parent = &c6x_soc_pll1.sysclks[0], | |
118 | .flags = CLK_PLL, | |
119 | }, | |
120 | { | |
121 | .name = "pll1_sysclk16", | |
122 | .parent = &c6x_soc_pll1.sysclks[0], | |
123 | .flags = CLK_PLL, | |
124 | }, | |
125 | }, | |
126 | }; | |
127 | ||
128 | /* CPU core clock */ | |
129 | struct clk c6x_core_clk = { | |
130 | .name = "core", | |
131 | }; | |
132 | ||
133 | /* miscellaneous IO clocks */ | |
134 | struct clk c6x_i2c_clk = { | |
135 | .name = "i2c", | |
136 | }; | |
137 | ||
138 | struct clk c6x_watchdog_clk = { | |
139 | .name = "watchdog", | |
140 | }; | |
141 | ||
142 | struct clk c6x_mcbsp1_clk = { | |
143 | .name = "mcbsp1", | |
144 | }; | |
145 | ||
146 | struct clk c6x_mcbsp2_clk = { | |
147 | .name = "mcbsp2", | |
148 | }; | |
149 | ||
150 | struct clk c6x_mdio_clk = { | |
151 | .name = "mdio", | |
152 | }; | |
153 | ||
154 | ||
155 | #ifdef CONFIG_SOC_TMS320C6455 | |
156 | static struct clk_lookup c6455_clks[] = { | |
157 | CLK(NULL, "pll1", &c6x_soc_pll1.sysclks[0]), | |
158 | CLK(NULL, "pll1_sysclk2", &c6x_soc_pll1.sysclks[2]), | |
159 | CLK(NULL, "pll1_sysclk3", &c6x_soc_pll1.sysclks[3]), | |
160 | CLK(NULL, "pll1_sysclk4", &c6x_soc_pll1.sysclks[4]), | |
161 | CLK(NULL, "pll1_sysclk5", &c6x_soc_pll1.sysclks[5]), | |
162 | CLK(NULL, "core", &c6x_core_clk), | |
163 | CLK("i2c_davinci.1", NULL, &c6x_i2c_clk), | |
164 | CLK("watchdog", NULL, &c6x_watchdog_clk), | |
165 | CLK("2c81800.mdio", NULL, &c6x_mdio_clk), | |
166 | CLK("", NULL, NULL) | |
167 | }; | |
168 | ||
169 | ||
170 | static void __init c6455_setup_clocks(struct device_node *node) | |
171 | { | |
172 | struct pll_data *pll = &c6x_soc_pll1; | |
173 | struct clk *sysclks = pll->sysclks; | |
174 | ||
175 | pll->flags = PLL_HAS_PRE | PLL_HAS_MUL; | |
176 | ||
177 | sysclks[2].flags |= FIXED_DIV_PLL; | |
178 | sysclks[2].div = 3; | |
179 | sysclks[3].flags |= FIXED_DIV_PLL; | |
180 | sysclks[3].div = 6; | |
181 | sysclks[4].div = PLLDIV4; | |
182 | sysclks[5].div = PLLDIV5; | |
183 | ||
184 | c6x_core_clk.parent = &sysclks[0]; | |
185 | c6x_i2c_clk.parent = &sysclks[3]; | |
186 | c6x_watchdog_clk.parent = &sysclks[3]; | |
187 | c6x_mdio_clk.parent = &sysclks[3]; | |
188 | ||
189 | c6x_clks_init(c6455_clks); | |
190 | } | |
191 | #endif /* CONFIG_SOC_TMS320C6455 */ | |
192 | ||
193 | #ifdef CONFIG_SOC_TMS320C6457 | |
194 | static struct clk_lookup c6457_clks[] = { | |
195 | CLK(NULL, "pll1", &c6x_soc_pll1.sysclks[0]), | |
196 | CLK(NULL, "pll1_sysclk1", &c6x_soc_pll1.sysclks[1]), | |
197 | CLK(NULL, "pll1_sysclk2", &c6x_soc_pll1.sysclks[2]), | |
198 | CLK(NULL, "pll1_sysclk3", &c6x_soc_pll1.sysclks[3]), | |
199 | CLK(NULL, "pll1_sysclk4", &c6x_soc_pll1.sysclks[4]), | |
200 | CLK(NULL, "pll1_sysclk5", &c6x_soc_pll1.sysclks[5]), | |
201 | CLK(NULL, "core", &c6x_core_clk), | |
202 | CLK("i2c_davinci.1", NULL, &c6x_i2c_clk), | |
203 | CLK("watchdog", NULL, &c6x_watchdog_clk), | |
204 | CLK("2c81800.mdio", NULL, &c6x_mdio_clk), | |
205 | CLK("", NULL, NULL) | |
206 | }; | |
207 | ||
208 | static void __init c6457_setup_clocks(struct device_node *node) | |
209 | { | |
210 | struct pll_data *pll = &c6x_soc_pll1; | |
211 | struct clk *sysclks = pll->sysclks; | |
212 | ||
213 | pll->flags = PLL_HAS_MUL | PLL_HAS_POST; | |
214 | ||
215 | sysclks[1].flags |= FIXED_DIV_PLL; | |
216 | sysclks[1].div = 1; | |
217 | sysclks[2].flags |= FIXED_DIV_PLL; | |
218 | sysclks[2].div = 3; | |
219 | sysclks[3].flags |= FIXED_DIV_PLL; | |
220 | sysclks[3].div = 6; | |
221 | sysclks[4].div = PLLDIV4; | |
222 | sysclks[5].div = PLLDIV5; | |
223 | ||
224 | c6x_core_clk.parent = &sysclks[1]; | |
225 | c6x_i2c_clk.parent = &sysclks[3]; | |
226 | c6x_watchdog_clk.parent = &sysclks[5]; | |
227 | c6x_mdio_clk.parent = &sysclks[5]; | |
228 | ||
229 | c6x_clks_init(c6457_clks); | |
230 | } | |
231 | #endif /* CONFIG_SOC_TMS320C6455 */ | |
232 | ||
233 | #ifdef CONFIG_SOC_TMS320C6472 | |
234 | static struct clk_lookup c6472_clks[] = { | |
235 | CLK(NULL, "pll1", &c6x_soc_pll1.sysclks[0]), | |
236 | CLK(NULL, "pll1_sysclk1", &c6x_soc_pll1.sysclks[1]), | |
237 | CLK(NULL, "pll1_sysclk2", &c6x_soc_pll1.sysclks[2]), | |
238 | CLK(NULL, "pll1_sysclk3", &c6x_soc_pll1.sysclks[3]), | |
239 | CLK(NULL, "pll1_sysclk4", &c6x_soc_pll1.sysclks[4]), | |
240 | CLK(NULL, "pll1_sysclk5", &c6x_soc_pll1.sysclks[5]), | |
241 | CLK(NULL, "pll1_sysclk6", &c6x_soc_pll1.sysclks[6]), | |
242 | CLK(NULL, "pll1_sysclk7", &c6x_soc_pll1.sysclks[7]), | |
243 | CLK(NULL, "pll1_sysclk8", &c6x_soc_pll1.sysclks[8]), | |
244 | CLK(NULL, "pll1_sysclk9", &c6x_soc_pll1.sysclks[9]), | |
245 | CLK(NULL, "pll1_sysclk10", &c6x_soc_pll1.sysclks[10]), | |
246 | CLK(NULL, "core", &c6x_core_clk), | |
247 | CLK("i2c_davinci.1", NULL, &c6x_i2c_clk), | |
248 | CLK("watchdog", NULL, &c6x_watchdog_clk), | |
249 | CLK("2c81800.mdio", NULL, &c6x_mdio_clk), | |
250 | CLK("", NULL, NULL) | |
251 | }; | |
252 | ||
253 | /* assumptions used for delay loop calculations */ | |
254 | #define MIN_CLKIN1_KHz 15625 | |
255 | #define MAX_CORE_KHz 700000 | |
256 | #define MIN_PLLOUT_KHz MIN_CLKIN1_KHz | |
257 | ||
258 | static void __init c6472_setup_clocks(struct device_node *node) | |
259 | { | |
260 | struct pll_data *pll = &c6x_soc_pll1; | |
261 | struct clk *sysclks = pll->sysclks; | |
262 | int i; | |
263 | ||
264 | pll->flags = PLL_HAS_MUL; | |
265 | ||
266 | for (i = 1; i <= 6; i++) { | |
267 | sysclks[i].flags |= FIXED_DIV_PLL; | |
268 | sysclks[i].div = 1; | |
269 | } | |
270 | ||
271 | sysclks[7].flags |= FIXED_DIV_PLL; | |
272 | sysclks[7].div = 3; | |
273 | sysclks[8].flags |= FIXED_DIV_PLL; | |
274 | sysclks[8].div = 6; | |
275 | sysclks[9].flags |= FIXED_DIV_PLL; | |
276 | sysclks[9].div = 2; | |
277 | sysclks[10].div = PLLDIV10; | |
278 | ||
279 | c6x_core_clk.parent = &sysclks[get_coreid() + 1]; | |
280 | c6x_i2c_clk.parent = &sysclks[8]; | |
281 | c6x_watchdog_clk.parent = &sysclks[8]; | |
282 | c6x_mdio_clk.parent = &sysclks[5]; | |
283 | ||
284 | c6x_clks_init(c6472_clks); | |
285 | } | |
286 | #endif /* CONFIG_SOC_TMS320C6472 */ | |
287 | ||
288 | ||
289 | #ifdef CONFIG_SOC_TMS320C6474 | |
290 | static struct clk_lookup c6474_clks[] = { | |
291 | CLK(NULL, "pll1", &c6x_soc_pll1.sysclks[0]), | |
292 | CLK(NULL, "pll1_sysclk7", &c6x_soc_pll1.sysclks[7]), | |
293 | CLK(NULL, "pll1_sysclk9", &c6x_soc_pll1.sysclks[9]), | |
294 | CLK(NULL, "pll1_sysclk10", &c6x_soc_pll1.sysclks[10]), | |
295 | CLK(NULL, "pll1_sysclk11", &c6x_soc_pll1.sysclks[11]), | |
296 | CLK(NULL, "pll1_sysclk12", &c6x_soc_pll1.sysclks[12]), | |
297 | CLK(NULL, "pll1_sysclk13", &c6x_soc_pll1.sysclks[13]), | |
298 | CLK(NULL, "core", &c6x_core_clk), | |
299 | CLK("i2c_davinci.1", NULL, &c6x_i2c_clk), | |
300 | CLK("mcbsp.1", NULL, &c6x_mcbsp1_clk), | |
301 | CLK("mcbsp.2", NULL, &c6x_mcbsp2_clk), | |
302 | CLK("watchdog", NULL, &c6x_watchdog_clk), | |
303 | CLK("2c81800.mdio", NULL, &c6x_mdio_clk), | |
304 | CLK("", NULL, NULL) | |
305 | }; | |
306 | ||
307 | static void __init c6474_setup_clocks(struct device_node *node) | |
308 | { | |
309 | struct pll_data *pll = &c6x_soc_pll1; | |
310 | struct clk *sysclks = pll->sysclks; | |
311 | ||
312 | pll->flags = PLL_HAS_MUL; | |
313 | ||
314 | sysclks[7].flags |= FIXED_DIV_PLL; | |
315 | sysclks[7].div = 1; | |
316 | sysclks[9].flags |= FIXED_DIV_PLL; | |
317 | sysclks[9].div = 3; | |
318 | sysclks[10].flags |= FIXED_DIV_PLL; | |
319 | sysclks[10].div = 6; | |
320 | ||
321 | sysclks[11].div = PLLDIV11; | |
322 | ||
323 | sysclks[12].flags |= FIXED_DIV_PLL; | |
324 | sysclks[12].div = 2; | |
325 | ||
326 | sysclks[13].div = PLLDIV13; | |
327 | ||
328 | c6x_core_clk.parent = &sysclks[7]; | |
329 | c6x_i2c_clk.parent = &sysclks[10]; | |
330 | c6x_watchdog_clk.parent = &sysclks[10]; | |
331 | c6x_mcbsp1_clk.parent = &sysclks[10]; | |
332 | c6x_mcbsp2_clk.parent = &sysclks[10]; | |
333 | ||
334 | c6x_clks_init(c6474_clks); | |
335 | } | |
336 | #endif /* CONFIG_SOC_TMS320C6474 */ | |
337 | ||
dbe91a2e KC |
338 | #ifdef CONFIG_SOC_TMS320C6678 |
339 | static struct clk_lookup c6678_clks[] = { | |
340 | CLK(NULL, "pll1", &c6x_soc_pll1.sysclks[0]), | |
341 | CLK(NULL, "pll1_refclk", &c6x_soc_pll1.sysclks[1]), | |
342 | CLK(NULL, "pll1_sysclk2", &c6x_soc_pll1.sysclks[2]), | |
343 | CLK(NULL, "pll1_sysclk3", &c6x_soc_pll1.sysclks[3]), | |
344 | CLK(NULL, "pll1_sysclk4", &c6x_soc_pll1.sysclks[4]), | |
345 | CLK(NULL, "pll1_sysclk5", &c6x_soc_pll1.sysclks[5]), | |
346 | CLK(NULL, "pll1_sysclk6", &c6x_soc_pll1.sysclks[6]), | |
347 | CLK(NULL, "pll1_sysclk7", &c6x_soc_pll1.sysclks[7]), | |
348 | CLK(NULL, "pll1_sysclk8", &c6x_soc_pll1.sysclks[8]), | |
349 | CLK(NULL, "pll1_sysclk9", &c6x_soc_pll1.sysclks[9]), | |
350 | CLK(NULL, "pll1_sysclk10", &c6x_soc_pll1.sysclks[10]), | |
351 | CLK(NULL, "pll1_sysclk11", &c6x_soc_pll1.sysclks[11]), | |
352 | CLK(NULL, "core", &c6x_core_clk), | |
353 | CLK("", NULL, NULL) | |
354 | }; | |
355 | ||
356 | static void __init c6678_setup_clocks(struct device_node *node) | |
357 | { | |
358 | struct pll_data *pll = &c6x_soc_pll1; | |
359 | struct clk *sysclks = pll->sysclks; | |
360 | ||
361 | pll->flags = PLL_HAS_MUL; | |
362 | ||
363 | sysclks[1].flags |= FIXED_DIV_PLL; | |
364 | sysclks[1].div = 1; | |
365 | ||
366 | sysclks[2].div = PLLDIV2; | |
367 | ||
368 | sysclks[3].flags |= FIXED_DIV_PLL; | |
369 | sysclks[3].div = 2; | |
370 | ||
371 | sysclks[4].flags |= FIXED_DIV_PLL; | |
372 | sysclks[4].div = 3; | |
373 | ||
374 | sysclks[5].div = PLLDIV5; | |
375 | ||
376 | sysclks[6].flags |= FIXED_DIV_PLL; | |
377 | sysclks[6].div = 64; | |
378 | ||
379 | sysclks[7].flags |= FIXED_DIV_PLL; | |
380 | sysclks[7].div = 6; | |
381 | ||
382 | sysclks[8].div = PLLDIV8; | |
383 | ||
384 | sysclks[9].flags |= FIXED_DIV_PLL; | |
385 | sysclks[9].div = 12; | |
386 | ||
387 | sysclks[10].flags |= FIXED_DIV_PLL; | |
388 | sysclks[10].div = 3; | |
389 | ||
390 | sysclks[11].flags |= FIXED_DIV_PLL; | |
391 | sysclks[11].div = 6; | |
392 | ||
393 | c6x_core_clk.parent = &sysclks[0]; | |
394 | c6x_i2c_clk.parent = &sysclks[7]; | |
395 | ||
396 | c6x_clks_init(c6678_clks); | |
397 | } | |
398 | #endif /* CONFIG_SOC_TMS320C6678 */ | |
399 | ||
81ec9889 MS |
400 | static struct of_device_id c6x_clkc_match[] __initdata = { |
401 | #ifdef CONFIG_SOC_TMS320C6455 | |
402 | { .compatible = "ti,c6455-pll", .data = c6455_setup_clocks }, | |
403 | #endif | |
404 | #ifdef CONFIG_SOC_TMS320C6457 | |
405 | { .compatible = "ti,c6457-pll", .data = c6457_setup_clocks }, | |
406 | #endif | |
407 | #ifdef CONFIG_SOC_TMS320C6472 | |
408 | { .compatible = "ti,c6472-pll", .data = c6472_setup_clocks }, | |
409 | #endif | |
410 | #ifdef CONFIG_SOC_TMS320C6474 | |
411 | { .compatible = "ti,c6474-pll", .data = c6474_setup_clocks }, | |
dbe91a2e KC |
412 | #endif |
413 | #ifdef CONFIG_SOC_TMS320C6678 | |
414 | { .compatible = "ti,c6678-pll", .data = c6678_setup_clocks }, | |
81ec9889 MS |
415 | #endif |
416 | { .compatible = "ti,c64x+pll" }, | |
417 | {} | |
418 | }; | |
419 | ||
420 | void __init c64x_setup_clocks(void) | |
421 | { | |
422 | void (*__setup_clocks)(struct device_node *np); | |
423 | struct pll_data *pll = &c6x_soc_pll1; | |
424 | struct device_node *node; | |
425 | const struct of_device_id *id; | |
426 | int err; | |
427 | u32 val; | |
428 | ||
429 | node = of_find_matching_node(NULL, c6x_clkc_match); | |
430 | if (!node) | |
431 | return; | |
432 | ||
433 | pll->base = of_iomap(node, 0); | |
434 | if (!pll->base) | |
435 | goto out; | |
436 | ||
437 | err = of_property_read_u32(node, "clock-frequency", &val); | |
438 | if (err || val == 0) { | |
636d4211 RH |
439 | pr_err("%pOF: no clock-frequency found! Using %dMHz\n", |
440 | node, (int)val / 1000000); | |
81ec9889 MS |
441 | val = 25000000; |
442 | } | |
443 | clkin1.rate = val; | |
444 | ||
445 | err = of_property_read_u32(node, "ti,c64x+pll-bypass-delay", &val); | |
446 | if (err) | |
447 | val = 5000; | |
448 | pll->bypass_delay = val; | |
449 | ||
450 | err = of_property_read_u32(node, "ti,c64x+pll-reset-delay", &val); | |
451 | if (err) | |
452 | val = 30000; | |
453 | pll->reset_delay = val; | |
454 | ||
455 | err = of_property_read_u32(node, "ti,c64x+pll-lock-delay", &val); | |
456 | if (err) | |
457 | val = 30000; | |
458 | pll->lock_delay = val; | |
459 | ||
460 | /* id->data is a pointer to SoC-specific setup */ | |
461 | id = of_match_node(c6x_clkc_match, node); | |
462 | if (id && id->data) { | |
463 | __setup_clocks = id->data; | |
464 | __setup_clocks(node); | |
465 | } | |
466 | ||
467 | out: | |
468 | of_node_put(node); | |
469 | } |