Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * Copyright (c) 2012, NVIDIA CORPORATION. All rights reserved.
4 */
5
6#include <linux/io.h>
7#include <linux/clk-provider.h>
8#include <linux/clkdev.h>
9#include <linux/init.h>
10#include <linux/of.h>
11#include <linux/of_address.h>
12#include <linux/platform_device.h>
13#include <linux/clk/tegra.h>
14#include <linux/delay.h>
15#include <dt-bindings/clock/tegra20-car.h>
16
17#include "clk.h"
18#include "clk-id.h"
19
20#define MISC_CLK_ENB 0x48
21
22#define OSC_CTRL 0x50
23#define OSC_CTRL_OSC_FREQ_MASK (3u<<30)
24#define OSC_CTRL_OSC_FREQ_13MHZ (0u<<30)
25#define OSC_CTRL_OSC_FREQ_19_2MHZ (1u<<30)
26#define OSC_CTRL_OSC_FREQ_12MHZ (2u<<30)
27#define OSC_CTRL_OSC_FREQ_26MHZ (3u<<30)
28#define OSC_CTRL_MASK (0x3f2u | OSC_CTRL_OSC_FREQ_MASK)
29
30#define OSC_CTRL_PLL_REF_DIV_MASK (3u<<28)
31#define OSC_CTRL_PLL_REF_DIV_1 (0u<<28)
32#define OSC_CTRL_PLL_REF_DIV_2 (1u<<28)
33#define OSC_CTRL_PLL_REF_DIV_4 (2u<<28)
34
35#define OSC_FREQ_DET 0x58
36#define OSC_FREQ_DET_TRIG (1u<<31)
37
38#define OSC_FREQ_DET_STATUS 0x5c
39#define OSC_FREQ_DET_BUSYu (1<<31)
40#define OSC_FREQ_DET_CNT_MASK 0xFFFFu
41
42#define TEGRA20_CLK_PERIPH_BANKS 3
43
44#define PLLS_BASE 0xf0
45#define PLLS_MISC 0xf4
46#define PLLC_BASE 0x80
47#define PLLC_MISC 0x8c
48#define PLLM_BASE 0x90
49#define PLLM_MISC 0x9c
50#define PLLP_BASE 0xa0
51#define PLLP_MISC 0xac
52#define PLLA_BASE 0xb0
53#define PLLA_MISC 0xbc
54#define PLLU_BASE 0xc0
55#define PLLU_MISC 0xcc
56#define PLLD_BASE 0xd0
57#define PLLD_MISC 0xdc
58#define PLLX_BASE 0xe0
59#define PLLX_MISC 0xe4
60#define PLLE_BASE 0xe8
61#define PLLE_MISC 0xec
62
63#define PLL_BASE_LOCK BIT(27)
64#define PLLE_MISC_LOCK BIT(11)
65
66#define PLL_MISC_LOCK_ENABLE 18
67#define PLLDU_MISC_LOCK_ENABLE 22
68#define PLLE_MISC_LOCK_ENABLE 9
69
70#define PLLC_OUT 0x84
71#define PLLM_OUT 0x94
72#define PLLP_OUTA 0xa4
73#define PLLP_OUTB 0xa8
74#define PLLA_OUT 0xb4
75
76#define CCLK_BURST_POLICY 0x20
77#define SUPER_CCLK_DIVIDER 0x24
78#define SCLK_BURST_POLICY 0x28
79#define SUPER_SCLK_DIVIDER 0x2c
80#define CLK_SYSTEM_RATE 0x30
81
82#define CCLK_BURST_POLICY_SHIFT 28
83#define CCLK_RUN_POLICY_SHIFT 4
84#define CCLK_IDLE_POLICY_SHIFT 0
85#define CCLK_IDLE_POLICY 1
86#define CCLK_RUN_POLICY 2
87#define CCLK_BURST_POLICY_PLLX 8
88
89#define CLK_SOURCE_I2S1 0x100
90#define CLK_SOURCE_I2S2 0x104
91#define CLK_SOURCE_PWM 0x110
92#define CLK_SOURCE_SPI 0x114
93#define CLK_SOURCE_XIO 0x120
94#define CLK_SOURCE_TWC 0x12c
95#define CLK_SOURCE_IDE 0x144
96#define CLK_SOURCE_HDMI 0x18c
97#define CLK_SOURCE_DISP1 0x138
98#define CLK_SOURCE_DISP2 0x13c
99#define CLK_SOURCE_CSITE 0x1d4
100#define CLK_SOURCE_I2C1 0x124
101#define CLK_SOURCE_I2C2 0x198
102#define CLK_SOURCE_I2C3 0x1b8
103#define CLK_SOURCE_DVC 0x128
104#define CLK_SOURCE_UARTA 0x178
105#define CLK_SOURCE_UARTB 0x17c
106#define CLK_SOURCE_UARTC 0x1a0
107#define CLK_SOURCE_UARTD 0x1c0
108#define CLK_SOURCE_UARTE 0x1c4
109#define CLK_SOURCE_EMC 0x19c
110
111#define AUDIO_SYNC_CLK 0x38
112
113/* Tegra CPU clock and reset control regs */
114#define TEGRA_CLK_RST_CONTROLLER_CLK_CPU_CMPLX 0x4c
115#define TEGRA_CLK_RST_CONTROLLER_RST_CPU_CMPLX_SET 0x340
116#define TEGRA_CLK_RST_CONTROLLER_RST_CPU_CMPLX_CLR 0x344
117
118#define CPU_CLOCK(cpu) (0x1 << (8 + cpu))
119#define CPU_RESET(cpu) (0x1111ul << (cpu))
120
121#ifdef CONFIG_PM_SLEEP
122static struct cpu_clk_suspend_context {
123 u32 pllx_misc;
124 u32 pllx_base;
125
126 u32 cpu_burst;
127 u32 clk_csite_src;
128 u32 cclk_divider;
129} tegra20_cpu_clk_sctx;
130#endif
131
132static void __iomem *clk_base;
133static void __iomem *pmc_base;
134
135#define TEGRA_INIT_DATA_MUX(_name, _parents, _offset, \
136 _clk_num, _gate_flags, _clk_id) \
137 TEGRA_INIT_DATA(_name, NULL, NULL, _parents, _offset, \
138 30, 2, 0, 0, 8, 1, TEGRA_DIVIDER_ROUND_UP, \
139 _clk_num, \
140 _gate_flags, _clk_id)
141
142#define TEGRA_INIT_DATA_DIV16(_name, _parents, _offset, \
143 _clk_num, _gate_flags, _clk_id) \
144 TEGRA_INIT_DATA(_name, NULL, NULL, _parents, _offset, \
145 30, 2, 0, 0, 16, 0, TEGRA_DIVIDER_ROUND_UP, \
146 _clk_num, _gate_flags, \
147 _clk_id)
148
149#define TEGRA_INIT_DATA_NODIV(_name, _parents, _offset, \
150 _mux_shift, _mux_width, _clk_num, \
151 _gate_flags, _clk_id) \
152 TEGRA_INIT_DATA(_name, NULL, NULL, _parents, _offset, \
153 _mux_shift, _mux_width, 0, 0, 0, 0, 0, \
154 _clk_num, _gate_flags, \
155 _clk_id)
156
157static struct clk **clks;
158
159static struct tegra_clk_pll_freq_table pll_c_freq_table[] = {
160 { 12000000, 600000000, 600, 12, 1, 8 },
161 { 13000000, 600000000, 600, 13, 1, 8 },
162 { 19200000, 600000000, 500, 16, 1, 6 },
163 { 26000000, 600000000, 600, 26, 1, 8 },
164 { 0, 0, 0, 0, 0, 0 },
165};
166
167static struct tegra_clk_pll_freq_table pll_m_freq_table[] = {
168 { 12000000, 666000000, 666, 12, 1, 8 },
169 { 13000000, 666000000, 666, 13, 1, 8 },
170 { 19200000, 666000000, 555, 16, 1, 8 },
171 { 26000000, 666000000, 666, 26, 1, 8 },
172 { 12000000, 600000000, 600, 12, 1, 8 },
173 { 13000000, 600000000, 600, 13, 1, 8 },
174 { 19200000, 600000000, 375, 12, 1, 6 },
175 { 26000000, 600000000, 600, 26, 1, 8 },
176 { 0, 0, 0, 0, 0, 0 },
177};
178
179static struct tegra_clk_pll_freq_table pll_p_freq_table[] = {
180 { 12000000, 216000000, 432, 12, 2, 8 },
181 { 13000000, 216000000, 432, 13, 2, 8 },
182 { 19200000, 216000000, 90, 4, 2, 1 },
183 { 26000000, 216000000, 432, 26, 2, 8 },
184 { 12000000, 432000000, 432, 12, 1, 8 },
185 { 13000000, 432000000, 432, 13, 1, 8 },
186 { 19200000, 432000000, 90, 4, 1, 1 },
187 { 26000000, 432000000, 432, 26, 1, 8 },
188 { 0, 0, 0, 0, 0, 0 },
189};
190
191static struct tegra_clk_pll_freq_table pll_a_freq_table[] = {
192 { 28800000, 56448000, 49, 25, 1, 1 },
193 { 28800000, 73728000, 64, 25, 1, 1 },
194 { 28800000, 24000000, 5, 6, 1, 1 },
195 { 0, 0, 0, 0, 0, 0 },
196};
197
198static struct tegra_clk_pll_freq_table pll_d_freq_table[] = {
199 { 12000000, 216000000, 216, 12, 1, 4 },
200 { 13000000, 216000000, 216, 13, 1, 4 },
201 { 19200000, 216000000, 135, 12, 1, 3 },
202 { 26000000, 216000000, 216, 26, 1, 4 },
203 { 12000000, 594000000, 594, 12, 1, 8 },
204 { 13000000, 594000000, 594, 13, 1, 8 },
205 { 19200000, 594000000, 495, 16, 1, 8 },
206 { 26000000, 594000000, 594, 26, 1, 8 },
207 { 12000000, 1000000000, 1000, 12, 1, 12 },
208 { 13000000, 1000000000, 1000, 13, 1, 12 },
209 { 19200000, 1000000000, 625, 12, 1, 8 },
210 { 26000000, 1000000000, 1000, 26, 1, 12 },
211 { 0, 0, 0, 0, 0, 0 },
212};
213
214static struct tegra_clk_pll_freq_table pll_u_freq_table[] = {
215 { 12000000, 480000000, 960, 12, 1, 0 },
216 { 13000000, 480000000, 960, 13, 1, 0 },
217 { 19200000, 480000000, 200, 4, 1, 0 },
218 { 26000000, 480000000, 960, 26, 1, 0 },
219 { 0, 0, 0, 0, 0, 0 },
220};
221
222static struct tegra_clk_pll_freq_table pll_x_freq_table[] = {
223 /* 1 GHz */
224 { 12000000, 1000000000, 1000, 12, 1, 12 },
225 { 13000000, 1000000000, 1000, 13, 1, 12 },
226 { 19200000, 1000000000, 625, 12, 1, 8 },
227 { 26000000, 1000000000, 1000, 26, 1, 12 },
228 /* 912 MHz */
229 { 12000000, 912000000, 912, 12, 1, 12 },
230 { 13000000, 912000000, 912, 13, 1, 12 },
231 { 19200000, 912000000, 760, 16, 1, 8 },
232 { 26000000, 912000000, 912, 26, 1, 12 },
233 /* 816 MHz */
234 { 12000000, 816000000, 816, 12, 1, 12 },
235 { 13000000, 816000000, 816, 13, 1, 12 },
236 { 19200000, 816000000, 680, 16, 1, 8 },
237 { 26000000, 816000000, 816, 26, 1, 12 },
238 /* 760 MHz */
239 { 12000000, 760000000, 760, 12, 1, 12 },
240 { 13000000, 760000000, 760, 13, 1, 12 },
241 { 19200000, 760000000, 950, 24, 1, 8 },
242 { 26000000, 760000000, 760, 26, 1, 12 },
243 /* 750 MHz */
244 { 12000000, 750000000, 750, 12, 1, 12 },
245 { 13000000, 750000000, 750, 13, 1, 12 },
246 { 19200000, 750000000, 625, 16, 1, 8 },
247 { 26000000, 750000000, 750, 26, 1, 12 },
248 /* 608 MHz */
249 { 12000000, 608000000, 608, 12, 1, 12 },
250 { 13000000, 608000000, 608, 13, 1, 12 },
251 { 19200000, 608000000, 380, 12, 1, 8 },
252 { 26000000, 608000000, 608, 26, 1, 12 },
253 /* 456 MHz */
254 { 12000000, 456000000, 456, 12, 1, 12 },
255 { 13000000, 456000000, 456, 13, 1, 12 },
256 { 19200000, 456000000, 380, 16, 1, 8 },
257 { 26000000, 456000000, 456, 26, 1, 12 },
258 /* 312 MHz */
259 { 12000000, 312000000, 312, 12, 1, 12 },
260 { 13000000, 312000000, 312, 13, 1, 12 },
261 { 19200000, 312000000, 260, 16, 1, 8 },
262 { 26000000, 312000000, 312, 26, 1, 12 },
263 { 0, 0, 0, 0, 0, 0 },
264};
265
266static const struct pdiv_map plle_p[] = {
267 { .pdiv = 1, .hw_val = 1 },
268 { .pdiv = 0, .hw_val = 0 },
269};
270
271static struct tegra_clk_pll_freq_table pll_e_freq_table[] = {
272 { 12000000, 100000000, 200, 24, 1, 0 },
273 { 0, 0, 0, 0, 0, 0 },
274};
275
276/* PLL parameters */
277static struct tegra_clk_pll_params pll_c_params = {
278 .input_min = 2000000,
279 .input_max = 31000000,
280 .cf_min = 1000000,
281 .cf_max = 6000000,
282 .vco_min = 20000000,
283 .vco_max = 1400000000,
284 .base_reg = PLLC_BASE,
285 .misc_reg = PLLC_MISC,
286 .lock_mask = PLL_BASE_LOCK,
287 .lock_enable_bit_idx = PLL_MISC_LOCK_ENABLE,
288 .lock_delay = 300,
289 .freq_table = pll_c_freq_table,
290 .flags = TEGRA_PLL_HAS_CPCON | TEGRA_PLL_HAS_LOCK_ENABLE,
291};
292
293static struct tegra_clk_pll_params pll_m_params = {
294 .input_min = 2000000,
295 .input_max = 31000000,
296 .cf_min = 1000000,
297 .cf_max = 6000000,
298 .vco_min = 20000000,
299 .vco_max = 1200000000,
300 .base_reg = PLLM_BASE,
301 .misc_reg = PLLM_MISC,
302 .lock_mask = PLL_BASE_LOCK,
303 .lock_enable_bit_idx = PLL_MISC_LOCK_ENABLE,
304 .lock_delay = 300,
305 .freq_table = pll_m_freq_table,
306 .flags = TEGRA_PLL_HAS_CPCON | TEGRA_PLL_HAS_LOCK_ENABLE,
307};
308
309static struct tegra_clk_pll_params pll_p_params = {
310 .input_min = 2000000,
311 .input_max = 31000000,
312 .cf_min = 1000000,
313 .cf_max = 6000000,
314 .vco_min = 20000000,
315 .vco_max = 1400000000,
316 .base_reg = PLLP_BASE,
317 .misc_reg = PLLP_MISC,
318 .lock_mask = PLL_BASE_LOCK,
319 .lock_enable_bit_idx = PLL_MISC_LOCK_ENABLE,
320 .lock_delay = 300,
321 .freq_table = pll_p_freq_table,
322 .flags = TEGRA_PLL_FIXED | TEGRA_PLL_HAS_CPCON |
323 TEGRA_PLL_HAS_LOCK_ENABLE,
324 .fixed_rate = 216000000,
325};
326
327static struct tegra_clk_pll_params pll_a_params = {
328 .input_min = 2000000,
329 .input_max = 31000000,
330 .cf_min = 1000000,
331 .cf_max = 6000000,
332 .vco_min = 20000000,
333 .vco_max = 1400000000,
334 .base_reg = PLLA_BASE,
335 .misc_reg = PLLA_MISC,
336 .lock_mask = PLL_BASE_LOCK,
337 .lock_enable_bit_idx = PLL_MISC_LOCK_ENABLE,
338 .lock_delay = 300,
339 .freq_table = pll_a_freq_table,
340 .flags = TEGRA_PLL_HAS_CPCON | TEGRA_PLL_HAS_LOCK_ENABLE,
341};
342
343static struct tegra_clk_pll_params pll_d_params = {
344 .input_min = 2000000,
345 .input_max = 40000000,
346 .cf_min = 1000000,
347 .cf_max = 6000000,
348 .vco_min = 40000000,
349 .vco_max = 1000000000,
350 .base_reg = PLLD_BASE,
351 .misc_reg = PLLD_MISC,
352 .lock_mask = PLL_BASE_LOCK,
353 .lock_enable_bit_idx = PLLDU_MISC_LOCK_ENABLE,
354 .lock_delay = 1000,
355 .freq_table = pll_d_freq_table,
356 .flags = TEGRA_PLL_HAS_CPCON | TEGRA_PLL_HAS_LOCK_ENABLE,
357};
358
359static const struct pdiv_map pllu_p[] = {
360 { .pdiv = 1, .hw_val = 1 },
361 { .pdiv = 2, .hw_val = 0 },
362 { .pdiv = 0, .hw_val = 0 },
363};
364
365static struct tegra_clk_pll_params pll_u_params = {
366 .input_min = 2000000,
367 .input_max = 40000000,
368 .cf_min = 1000000,
369 .cf_max = 6000000,
370 .vco_min = 48000000,
371 .vco_max = 960000000,
372 .base_reg = PLLU_BASE,
373 .misc_reg = PLLU_MISC,
374 .lock_mask = PLL_BASE_LOCK,
375 .lock_enable_bit_idx = PLLDU_MISC_LOCK_ENABLE,
376 .lock_delay = 1000,
377 .pdiv_tohw = pllu_p,
378 .freq_table = pll_u_freq_table,
379 .flags = TEGRA_PLLU | TEGRA_PLL_HAS_CPCON | TEGRA_PLL_HAS_LOCK_ENABLE,
380};
381
382static struct tegra_clk_pll_params pll_x_params = {
383 .input_min = 2000000,
384 .input_max = 31000000,
385 .cf_min = 1000000,
386 .cf_max = 6000000,
387 .vco_min = 20000000,
388 .vco_max = 1200000000,
389 .base_reg = PLLX_BASE,
390 .misc_reg = PLLX_MISC,
391 .lock_mask = PLL_BASE_LOCK,
392 .lock_enable_bit_idx = PLL_MISC_LOCK_ENABLE,
393 .lock_delay = 300,
394 .freq_table = pll_x_freq_table,
395 .flags = TEGRA_PLL_HAS_CPCON | TEGRA_PLL_HAS_LOCK_ENABLE,
396 .pre_rate_change = tegra_cclk_pre_pllx_rate_change,
397 .post_rate_change = tegra_cclk_post_pllx_rate_change,
398};
399
400static struct tegra_clk_pll_params pll_e_params = {
401 .input_min = 12000000,
402 .input_max = 12000000,
403 .cf_min = 0,
404 .cf_max = 0,
405 .vco_min = 0,
406 .vco_max = 0,
407 .base_reg = PLLE_BASE,
408 .misc_reg = PLLE_MISC,
409 .lock_mask = PLLE_MISC_LOCK,
410 .lock_enable_bit_idx = PLLE_MISC_LOCK_ENABLE,
411 .lock_delay = 0,
412 .pdiv_tohw = plle_p,
413 .freq_table = pll_e_freq_table,
414 .flags = TEGRA_PLL_FIXED | TEGRA_PLL_LOCK_MISC |
415 TEGRA_PLL_HAS_LOCK_ENABLE,
416 .fixed_rate = 100000000,
417};
418
419static struct tegra_devclk devclks[] = {
420 { .con_id = "pll_c", .dt_id = TEGRA20_CLK_PLL_C },
421 { .con_id = "pll_c_out1", .dt_id = TEGRA20_CLK_PLL_C_OUT1 },
422 { .con_id = "pll_p", .dt_id = TEGRA20_CLK_PLL_P },
423 { .con_id = "pll_p_out1", .dt_id = TEGRA20_CLK_PLL_P_OUT1 },
424 { .con_id = "pll_p_out2", .dt_id = TEGRA20_CLK_PLL_P_OUT2 },
425 { .con_id = "pll_p_out3", .dt_id = TEGRA20_CLK_PLL_P_OUT3 },
426 { .con_id = "pll_p_out4", .dt_id = TEGRA20_CLK_PLL_P_OUT4 },
427 { .con_id = "pll_m", .dt_id = TEGRA20_CLK_PLL_M },
428 { .con_id = "pll_m_out1", .dt_id = TEGRA20_CLK_PLL_M_OUT1 },
429 { .con_id = "pll_x", .dt_id = TEGRA20_CLK_PLL_X },
430 { .con_id = "pll_u", .dt_id = TEGRA20_CLK_PLL_U },
431 { .con_id = "pll_d", .dt_id = TEGRA20_CLK_PLL_D },
432 { .con_id = "pll_d_out0", .dt_id = TEGRA20_CLK_PLL_D_OUT0 },
433 { .con_id = "pll_a", .dt_id = TEGRA20_CLK_PLL_A },
434 { .con_id = "pll_a_out0", .dt_id = TEGRA20_CLK_PLL_A_OUT0 },
435 { .con_id = "pll_e", .dt_id = TEGRA20_CLK_PLL_E },
436 { .con_id = "cclk", .dt_id = TEGRA20_CLK_CCLK },
437 { .con_id = "sclk", .dt_id = TEGRA20_CLK_SCLK },
438 { .con_id = "hclk", .dt_id = TEGRA20_CLK_HCLK },
439 { .con_id = "pclk", .dt_id = TEGRA20_CLK_PCLK },
440 { .con_id = "fuse", .dt_id = TEGRA20_CLK_FUSE },
441 { .con_id = "twd", .dt_id = TEGRA20_CLK_TWD },
442 { .con_id = "audio", .dt_id = TEGRA20_CLK_AUDIO },
443 { .con_id = "audio_2x", .dt_id = TEGRA20_CLK_AUDIO_2X },
444 { .dev_id = "tegra20-ac97", .dt_id = TEGRA20_CLK_AC97 },
445 { .dev_id = "tegra-apbdma", .dt_id = TEGRA20_CLK_APBDMA },
446 { .dev_id = "rtc-tegra", .dt_id = TEGRA20_CLK_RTC },
447 { .dev_id = "timer", .dt_id = TEGRA20_CLK_TIMER },
448 { .dev_id = "tegra-kbc", .dt_id = TEGRA20_CLK_KBC },
449 { .con_id = "csus", .dev_id = "tegra_camera", .dt_id = TEGRA20_CLK_CSUS },
450 { .con_id = "vcp", .dev_id = "tegra-avp", .dt_id = TEGRA20_CLK_VCP },
451 { .con_id = "bsea", .dev_id = "tegra-avp", .dt_id = TEGRA20_CLK_BSEA },
452 { .con_id = "bsev", .dev_id = "tegra-aes", .dt_id = TEGRA20_CLK_BSEV },
453 { .con_id = "emc", .dt_id = TEGRA20_CLK_EMC },
454 { .dev_id = "fsl-tegra-udc", .dt_id = TEGRA20_CLK_USBD },
455 { .dev_id = "tegra-ehci.1", .dt_id = TEGRA20_CLK_USB2 },
456 { .dev_id = "tegra-ehci.2", .dt_id = TEGRA20_CLK_USB3 },
457 { .dev_id = "dsi", .dt_id = TEGRA20_CLK_DSI },
458 { .con_id = "csi", .dev_id = "tegra_camera", .dt_id = TEGRA20_CLK_CSI },
459 { .con_id = "isp", .dev_id = "tegra_camera", .dt_id = TEGRA20_CLK_ISP },
460 { .con_id = "pex", .dt_id = TEGRA20_CLK_PEX },
461 { .con_id = "afi", .dt_id = TEGRA20_CLK_AFI },
462 { .con_id = "cdev1", .dt_id = TEGRA20_CLK_CDEV1 },
463 { .con_id = "cdev2", .dt_id = TEGRA20_CLK_CDEV2 },
464 { .con_id = "clk_32k", .dt_id = TEGRA20_CLK_CLK_32K },
465 { .con_id = "clk_m", .dt_id = TEGRA20_CLK_CLK_M },
466 { .con_id = "pll_ref", .dt_id = TEGRA20_CLK_PLL_REF },
467 { .dev_id = "tegra20-i2s.0", .dt_id = TEGRA20_CLK_I2S1 },
468 { .dev_id = "tegra20-i2s.1", .dt_id = TEGRA20_CLK_I2S2 },
469 { .con_id = "spdif_out", .dev_id = "tegra20-spdif", .dt_id = TEGRA20_CLK_SPDIF_OUT },
470 { .con_id = "spdif_in", .dev_id = "tegra20-spdif", .dt_id = TEGRA20_CLK_SPDIF_IN },
471 { .dev_id = "spi_tegra.0", .dt_id = TEGRA20_CLK_SBC1 },
472 { .dev_id = "spi_tegra.1", .dt_id = TEGRA20_CLK_SBC2 },
473 { .dev_id = "spi_tegra.2", .dt_id = TEGRA20_CLK_SBC3 },
474 { .dev_id = "spi_tegra.3", .dt_id = TEGRA20_CLK_SBC4 },
475 { .dev_id = "spi", .dt_id = TEGRA20_CLK_SPI },
476 { .dev_id = "xio", .dt_id = TEGRA20_CLK_XIO },
477 { .dev_id = "twc", .dt_id = TEGRA20_CLK_TWC },
478 { .dev_id = "ide", .dt_id = TEGRA20_CLK_IDE },
479 { .dev_id = "tegra_nand", .dt_id = TEGRA20_CLK_NDFLASH },
480 { .dev_id = "vfir", .dt_id = TEGRA20_CLK_VFIR },
481 { .dev_id = "csite", .dt_id = TEGRA20_CLK_CSITE },
482 { .dev_id = "la", .dt_id = TEGRA20_CLK_LA },
483 { .dev_id = "tegra_w1", .dt_id = TEGRA20_CLK_OWR },
484 { .dev_id = "mipi", .dt_id = TEGRA20_CLK_MIPI },
485 { .dev_id = "vde", .dt_id = TEGRA20_CLK_VDE },
486 { .con_id = "vi", .dev_id = "tegra_camera", .dt_id = TEGRA20_CLK_VI },
487 { .dev_id = "epp", .dt_id = TEGRA20_CLK_EPP },
488 { .dev_id = "mpe", .dt_id = TEGRA20_CLK_MPE },
489 { .dev_id = "host1x", .dt_id = TEGRA20_CLK_HOST1X },
490 { .dev_id = "3d", .dt_id = TEGRA20_CLK_GR3D },
491 { .dev_id = "2d", .dt_id = TEGRA20_CLK_GR2D },
492 { .dev_id = "tegra-nor", .dt_id = TEGRA20_CLK_NOR },
493 { .dev_id = "sdhci-tegra.0", .dt_id = TEGRA20_CLK_SDMMC1 },
494 { .dev_id = "sdhci-tegra.1", .dt_id = TEGRA20_CLK_SDMMC2 },
495 { .dev_id = "sdhci-tegra.2", .dt_id = TEGRA20_CLK_SDMMC3 },
496 { .dev_id = "sdhci-tegra.3", .dt_id = TEGRA20_CLK_SDMMC4 },
497 { .dev_id = "cve", .dt_id = TEGRA20_CLK_CVE },
498 { .dev_id = "tvo", .dt_id = TEGRA20_CLK_TVO },
499 { .dev_id = "tvdac", .dt_id = TEGRA20_CLK_TVDAC },
500 { .con_id = "vi_sensor", .dev_id = "tegra_camera", .dt_id = TEGRA20_CLK_VI_SENSOR },
501 { .dev_id = "hdmi", .dt_id = TEGRA20_CLK_HDMI },
502 { .con_id = "div-clk", .dev_id = "tegra-i2c.0", .dt_id = TEGRA20_CLK_I2C1 },
503 { .con_id = "div-clk", .dev_id = "tegra-i2c.1", .dt_id = TEGRA20_CLK_I2C2 },
504 { .con_id = "div-clk", .dev_id = "tegra-i2c.2", .dt_id = TEGRA20_CLK_I2C3 },
505 { .con_id = "div-clk", .dev_id = "tegra-i2c.3", .dt_id = TEGRA20_CLK_DVC },
506 { .dev_id = "tegra-pwm", .dt_id = TEGRA20_CLK_PWM },
507 { .dev_id = "tegra_uart.0", .dt_id = TEGRA20_CLK_UARTA },
508 { .dev_id = "tegra_uart.1", .dt_id = TEGRA20_CLK_UARTB },
509 { .dev_id = "tegra_uart.2", .dt_id = TEGRA20_CLK_UARTC },
510 { .dev_id = "tegra_uart.3", .dt_id = TEGRA20_CLK_UARTD },
511 { .dev_id = "tegra_uart.4", .dt_id = TEGRA20_CLK_UARTE },
512 { .dev_id = "tegradc.0", .dt_id = TEGRA20_CLK_DISP1 },
513 { .dev_id = "tegradc.1", .dt_id = TEGRA20_CLK_DISP2 },
514};
515
516static struct tegra_clk tegra20_clks[tegra_clk_max] __initdata = {
517 [tegra_clk_ahbdma] = { .dt_id = TEGRA20_CLK_AHBDMA, .present = true },
518 [tegra_clk_apbdma] = { .dt_id = TEGRA20_CLK_APBDMA, .present = true },
519 [tegra_clk_spdif_out] = { .dt_id = TEGRA20_CLK_SPDIF_OUT, .present = true },
520 [tegra_clk_spdif_in] = { .dt_id = TEGRA20_CLK_SPDIF_IN, .present = true },
521 [tegra_clk_sdmmc1] = { .dt_id = TEGRA20_CLK_SDMMC1, .present = true },
522 [tegra_clk_sdmmc2] = { .dt_id = TEGRA20_CLK_SDMMC2, .present = true },
523 [tegra_clk_sdmmc3] = { .dt_id = TEGRA20_CLK_SDMMC3, .present = true },
524 [tegra_clk_sdmmc4] = { .dt_id = TEGRA20_CLK_SDMMC4, .present = true },
525 [tegra_clk_la] = { .dt_id = TEGRA20_CLK_LA, .present = true },
526 [tegra_clk_csite] = { .dt_id = TEGRA20_CLK_CSITE, .present = true },
527 [tegra_clk_vfir] = { .dt_id = TEGRA20_CLK_VFIR, .present = true },
528 [tegra_clk_mipi] = { .dt_id = TEGRA20_CLK_MIPI, .present = true },
529 [tegra_clk_nor] = { .dt_id = TEGRA20_CLK_NOR, .present = true },
530 [tegra_clk_rtc] = { .dt_id = TEGRA20_CLK_RTC, .present = true },
531 [tegra_clk_timer] = { .dt_id = TEGRA20_CLK_TIMER, .present = true },
532 [tegra_clk_kbc] = { .dt_id = TEGRA20_CLK_KBC, .present = true },
533 [tegra_clk_vcp] = { .dt_id = TEGRA20_CLK_VCP, .present = true },
534 [tegra_clk_bsea] = { .dt_id = TEGRA20_CLK_BSEA, .present = true },
535 [tegra_clk_bsev] = { .dt_id = TEGRA20_CLK_BSEV, .present = true },
536 [tegra_clk_usbd] = { .dt_id = TEGRA20_CLK_USBD, .present = true },
537 [tegra_clk_usb2] = { .dt_id = TEGRA20_CLK_USB2, .present = true },
538 [tegra_clk_usb3] = { .dt_id = TEGRA20_CLK_USB3, .present = true },
539 [tegra_clk_csi] = { .dt_id = TEGRA20_CLK_CSI, .present = true },
540 [tegra_clk_isp] = { .dt_id = TEGRA20_CLK_ISP, .present = true },
541 [tegra_clk_clk_32k] = { .dt_id = TEGRA20_CLK_CLK_32K, .present = true },
542 [tegra_clk_hclk] = { .dt_id = TEGRA20_CLK_HCLK, .present = true },
543 [tegra_clk_pclk] = { .dt_id = TEGRA20_CLK_PCLK, .present = true },
544 [tegra_clk_pll_p_out1] = { .dt_id = TEGRA20_CLK_PLL_P_OUT1, .present = true },
545 [tegra_clk_pll_p_out2] = { .dt_id = TEGRA20_CLK_PLL_P_OUT2, .present = true },
546 [tegra_clk_pll_p_out3] = { .dt_id = TEGRA20_CLK_PLL_P_OUT3, .present = true },
547 [tegra_clk_pll_p_out4] = { .dt_id = TEGRA20_CLK_PLL_P_OUT4, .present = true },
548 [tegra_clk_pll_p] = { .dt_id = TEGRA20_CLK_PLL_P, .present = true },
549 [tegra_clk_owr] = { .dt_id = TEGRA20_CLK_OWR, .present = true },
550 [tegra_clk_sbc1] = { .dt_id = TEGRA20_CLK_SBC1, .present = true },
551 [tegra_clk_sbc2] = { .dt_id = TEGRA20_CLK_SBC2, .present = true },
552 [tegra_clk_sbc3] = { .dt_id = TEGRA20_CLK_SBC3, .present = true },
553 [tegra_clk_sbc4] = { .dt_id = TEGRA20_CLK_SBC4, .present = true },
554 [tegra_clk_vde] = { .dt_id = TEGRA20_CLK_VDE, .present = true },
555 [tegra_clk_vi] = { .dt_id = TEGRA20_CLK_VI, .present = true },
556 [tegra_clk_epp] = { .dt_id = TEGRA20_CLK_EPP, .present = true },
557 [tegra_clk_mpe] = { .dt_id = TEGRA20_CLK_MPE, .present = true },
558 [tegra_clk_host1x] = { .dt_id = TEGRA20_CLK_HOST1X, .present = true },
559 [tegra_clk_gr2d] = { .dt_id = TEGRA20_CLK_GR2D, .present = true },
560 [tegra_clk_gr3d] = { .dt_id = TEGRA20_CLK_GR3D, .present = true },
561 [tegra_clk_ndflash] = { .dt_id = TEGRA20_CLK_NDFLASH, .present = true },
562 [tegra_clk_cve] = { .dt_id = TEGRA20_CLK_CVE, .present = true },
563 [tegra_clk_tvo] = { .dt_id = TEGRA20_CLK_TVO, .present = true },
564 [tegra_clk_tvdac] = { .dt_id = TEGRA20_CLK_TVDAC, .present = true },
565 [tegra_clk_vi_sensor] = { .dt_id = TEGRA20_CLK_VI_SENSOR, .present = true },
566 [tegra_clk_afi] = { .dt_id = TEGRA20_CLK_AFI, .present = true },
567 [tegra_clk_fuse] = { .dt_id = TEGRA20_CLK_FUSE, .present = true },
568 [tegra_clk_kfuse] = { .dt_id = TEGRA20_CLK_KFUSE, .present = true },
569};
570
571static unsigned long tegra20_clk_measure_input_freq(void)
572{
573 u32 osc_ctrl = readl_relaxed(clk_base + OSC_CTRL);
574 u32 auto_clk_control = osc_ctrl & OSC_CTRL_OSC_FREQ_MASK;
575 u32 pll_ref_div = osc_ctrl & OSC_CTRL_PLL_REF_DIV_MASK;
576 unsigned long input_freq;
577
578 switch (auto_clk_control) {
579 case OSC_CTRL_OSC_FREQ_12MHZ:
580 BUG_ON(pll_ref_div != OSC_CTRL_PLL_REF_DIV_1);
581 input_freq = 12000000;
582 break;
583 case OSC_CTRL_OSC_FREQ_13MHZ:
584 BUG_ON(pll_ref_div != OSC_CTRL_PLL_REF_DIV_1);
585 input_freq = 13000000;
586 break;
587 case OSC_CTRL_OSC_FREQ_19_2MHZ:
588 BUG_ON(pll_ref_div != OSC_CTRL_PLL_REF_DIV_1);
589 input_freq = 19200000;
590 break;
591 case OSC_CTRL_OSC_FREQ_26MHZ:
592 BUG_ON(pll_ref_div != OSC_CTRL_PLL_REF_DIV_1);
593 input_freq = 26000000;
594 break;
595 default:
596 pr_err("Unexpected clock autodetect value %d",
597 auto_clk_control);
598 BUG();
599 return 0;
600 }
601
602 return input_freq;
603}
604
605static unsigned int tegra20_get_pll_ref_div(void)
606{
607 u32 pll_ref_div = readl_relaxed(clk_base + OSC_CTRL) &
608 OSC_CTRL_PLL_REF_DIV_MASK;
609
610 switch (pll_ref_div) {
611 case OSC_CTRL_PLL_REF_DIV_1:
612 return 1;
613 case OSC_CTRL_PLL_REF_DIV_2:
614 return 2;
615 case OSC_CTRL_PLL_REF_DIV_4:
616 return 4;
617 default:
618 pr_err("Invalid pll ref divider %d\n", pll_ref_div);
619 BUG();
620 }
621 return 0;
622}
623
624static void tegra20_pll_init(void)
625{
626 struct clk *clk;
627
628 /* PLLC */
629 clk = tegra_clk_register_pll("pll_c", "pll_ref", clk_base, NULL, 0,
630 &pll_c_params, NULL);
631 clks[TEGRA20_CLK_PLL_C] = clk;
632
633 /* PLLC_OUT1 */
634 clk = tegra_clk_register_divider("pll_c_out1_div", "pll_c",
635 clk_base + PLLC_OUT, 0, TEGRA_DIVIDER_ROUND_UP,
636 8, 8, 1, NULL);
637 clk = tegra_clk_register_pll_out("pll_c_out1", "pll_c_out1_div",
638 clk_base + PLLC_OUT, 1, 0, CLK_SET_RATE_PARENT,
639 0, NULL);
640 clks[TEGRA20_CLK_PLL_C_OUT1] = clk;
641
642 /* PLLM */
643 clk = tegra_clk_register_pll("pll_m", "pll_ref", clk_base, NULL,
644 CLK_SET_RATE_GATE, &pll_m_params, NULL);
645 clks[TEGRA20_CLK_PLL_M] = clk;
646
647 /* PLLM_OUT1 */
648 clk = tegra_clk_register_divider("pll_m_out1_div", "pll_m",
649 clk_base + PLLM_OUT, 0, TEGRA_DIVIDER_ROUND_UP,
650 8, 8, 1, NULL);
651 clk = tegra_clk_register_pll_out("pll_m_out1", "pll_m_out1_div",
652 clk_base + PLLM_OUT, 1, 0,
653 CLK_SET_RATE_PARENT, 0, NULL);
654 clks[TEGRA20_CLK_PLL_M_OUT1] = clk;
655
656 /* PLLX */
657 clk = tegra_clk_register_pll("pll_x", "pll_ref", clk_base, NULL, 0,
658 &pll_x_params, NULL);
659 clks[TEGRA20_CLK_PLL_X] = clk;
660
661 /* PLLU */
662 clk = tegra_clk_register_pll("pll_u", "pll_ref", clk_base, NULL, 0,
663 &pll_u_params, NULL);
664 clks[TEGRA20_CLK_PLL_U] = clk;
665
666 /* PLLD */
667 clk = tegra_clk_register_pll("pll_d", "pll_ref", clk_base, NULL, 0,
668 &pll_d_params, NULL);
669 clks[TEGRA20_CLK_PLL_D] = clk;
670
671 /* PLLD_OUT0 */
672 clk = clk_register_fixed_factor(NULL, "pll_d_out0", "pll_d",
673 CLK_SET_RATE_PARENT, 1, 2);
674 clks[TEGRA20_CLK_PLL_D_OUT0] = clk;
675
676 /* PLLA */
677 clk = tegra_clk_register_pll("pll_a", "pll_p_out1", clk_base, NULL, 0,
678 &pll_a_params, NULL);
679 clks[TEGRA20_CLK_PLL_A] = clk;
680
681 /* PLLA_OUT0 */
682 clk = tegra_clk_register_divider("pll_a_out0_div", "pll_a",
683 clk_base + PLLA_OUT, 0, TEGRA_DIVIDER_ROUND_UP,
684 8, 8, 1, NULL);
685 clk = tegra_clk_register_pll_out("pll_a_out0", "pll_a_out0_div",
686 clk_base + PLLA_OUT, 1, 0, CLK_IGNORE_UNUSED |
687 CLK_SET_RATE_PARENT, 0, NULL);
688 clks[TEGRA20_CLK_PLL_A_OUT0] = clk;
689
690 /* PLLE */
691 clk = tegra_clk_register_plle("pll_e", "pll_ref", clk_base, pmc_base,
692 0, &pll_e_params, NULL);
693 clks[TEGRA20_CLK_PLL_E] = clk;
694}
695
696static const char *cclk_parents[] = { "clk_m", "pll_c", "clk_32k", "pll_m",
697 "pll_p", "pll_p_out4",
698 "pll_p_out3", "clk_d", "pll_x" };
699static const char *sclk_parents[] = { "clk_m", "pll_c_out1", "pll_p_out4",
700 "pll_p_out3", "pll_p_out2", "clk_d",
701 "clk_32k", "pll_m_out1" };
702
703static void tegra20_super_clk_init(void)
704{
705 struct clk *clk;
706
707 /* CCLK */
708 clk = tegra_clk_register_super_cclk("cclk", cclk_parents,
709 ARRAY_SIZE(cclk_parents), CLK_SET_RATE_PARENT,
710 clk_base + CCLK_BURST_POLICY, TEGRA20_SUPER_CLK,
711 NULL);
712 clks[TEGRA20_CLK_CCLK] = clk;
713
714 /* twd */
715 clk = clk_register_fixed_factor(NULL, "twd", "cclk", 0, 1, 4);
716 clks[TEGRA20_CLK_TWD] = clk;
717}
718
719static const char *audio_parents[] = { "spdif_in", "i2s1", "i2s2", "unused",
720 "pll_a_out0", "unused", "unused",
721 "unused" };
722
723static void __init tegra20_audio_clk_init(void)
724{
725 struct clk *clk;
726
727 /* audio */
728 clk = clk_register_mux(NULL, "audio_mux", audio_parents,
729 ARRAY_SIZE(audio_parents),
730 CLK_SET_RATE_NO_REPARENT,
731 clk_base + AUDIO_SYNC_CLK, 0, 3, 0, NULL);
732 clk = clk_register_gate(NULL, "audio", "audio_mux", 0,
733 clk_base + AUDIO_SYNC_CLK, 4,
734 CLK_GATE_SET_TO_DISABLE, NULL);
735 clks[TEGRA20_CLK_AUDIO] = clk;
736
737 /* audio_2x */
738 clk = clk_register_fixed_factor(NULL, "audio_doubler", "audio",
739 CLK_SET_RATE_PARENT, 2, 1);
740 clk = tegra_clk_register_periph_gate("audio_2x", "audio_doubler",
741 TEGRA_PERIPH_NO_RESET, clk_base,
742 CLK_SET_RATE_PARENT, 89,
743 periph_clk_enb_refcnt);
744 clks[TEGRA20_CLK_AUDIO_2X] = clk;
745}
746
747static const char *i2s1_parents[] = { "pll_a_out0", "audio_2x", "pll_p",
748 "clk_m" };
749static const char *i2s2_parents[] = { "pll_a_out0", "audio_2x", "pll_p",
750 "clk_m" };
751static const char *pwm_parents[] = { "pll_p", "pll_c", "audio", "clk_m",
752 "clk_32k" };
753static const char *mux_pllpcm_clkm[] = { "pll_p", "pll_c", "pll_m", "clk_m" };
754static const char *mux_pllpdc_clkm[] = { "pll_p", "pll_d_out0", "pll_c",
755 "clk_m" };
756
757static struct tegra_periph_init_data tegra_periph_clk_list[] = {
758 TEGRA_INIT_DATA_MUX("i2s1", i2s1_parents, CLK_SOURCE_I2S1, 11, TEGRA_PERIPH_ON_APB, TEGRA20_CLK_I2S1),
759 TEGRA_INIT_DATA_MUX("i2s2", i2s2_parents, CLK_SOURCE_I2S2, 18, TEGRA_PERIPH_ON_APB, TEGRA20_CLK_I2S2),
760 TEGRA_INIT_DATA_MUX("spi", mux_pllpcm_clkm, CLK_SOURCE_SPI, 43, TEGRA_PERIPH_ON_APB, TEGRA20_CLK_SPI),
761 TEGRA_INIT_DATA_MUX("xio", mux_pllpcm_clkm, CLK_SOURCE_XIO, 45, 0, TEGRA20_CLK_XIO),
762 TEGRA_INIT_DATA_MUX("twc", mux_pllpcm_clkm, CLK_SOURCE_TWC, 16, TEGRA_PERIPH_ON_APB, TEGRA20_CLK_TWC),
763 TEGRA_INIT_DATA_MUX("ide", mux_pllpcm_clkm, CLK_SOURCE_XIO, 25, 0, TEGRA20_CLK_IDE),
764 TEGRA_INIT_DATA_DIV16("dvc", mux_pllpcm_clkm, CLK_SOURCE_DVC, 47, TEGRA_PERIPH_ON_APB, TEGRA20_CLK_DVC),
765 TEGRA_INIT_DATA_DIV16("i2c1", mux_pllpcm_clkm, CLK_SOURCE_I2C1, 12, TEGRA_PERIPH_ON_APB, TEGRA20_CLK_I2C1),
766 TEGRA_INIT_DATA_DIV16("i2c2", mux_pllpcm_clkm, CLK_SOURCE_I2C2, 54, TEGRA_PERIPH_ON_APB, TEGRA20_CLK_I2C2),
767 TEGRA_INIT_DATA_DIV16("i2c3", mux_pllpcm_clkm, CLK_SOURCE_I2C3, 67, TEGRA_PERIPH_ON_APB, TEGRA20_CLK_I2C3),
768 TEGRA_INIT_DATA_MUX("hdmi", mux_pllpdc_clkm, CLK_SOURCE_HDMI, 51, 0, TEGRA20_CLK_HDMI),
769 TEGRA_INIT_DATA("pwm", NULL, NULL, pwm_parents, CLK_SOURCE_PWM, 28, 3, 0, 0, 8, 1, 0, 17, TEGRA_PERIPH_ON_APB, TEGRA20_CLK_PWM),
770};
771
772static struct tegra_periph_init_data tegra_periph_nodiv_clk_list[] = {
773 TEGRA_INIT_DATA_NODIV("uarta", mux_pllpcm_clkm, CLK_SOURCE_UARTA, 30, 2, 6, TEGRA_PERIPH_ON_APB, TEGRA20_CLK_UARTA),
774 TEGRA_INIT_DATA_NODIV("uartb", mux_pllpcm_clkm, CLK_SOURCE_UARTB, 30, 2, 7, TEGRA_PERIPH_ON_APB, TEGRA20_CLK_UARTB),
775 TEGRA_INIT_DATA_NODIV("uartc", mux_pllpcm_clkm, CLK_SOURCE_UARTC, 30, 2, 55, TEGRA_PERIPH_ON_APB, TEGRA20_CLK_UARTC),
776 TEGRA_INIT_DATA_NODIV("uartd", mux_pllpcm_clkm, CLK_SOURCE_UARTD, 30, 2, 65, TEGRA_PERIPH_ON_APB, TEGRA20_CLK_UARTD),
777 TEGRA_INIT_DATA_NODIV("uarte", mux_pllpcm_clkm, CLK_SOURCE_UARTE, 30, 2, 66, TEGRA_PERIPH_ON_APB, TEGRA20_CLK_UARTE),
778 TEGRA_INIT_DATA_NODIV("disp1", mux_pllpdc_clkm, CLK_SOURCE_DISP1, 30, 2, 27, 0, TEGRA20_CLK_DISP1),
779 TEGRA_INIT_DATA_NODIV("disp2", mux_pllpdc_clkm, CLK_SOURCE_DISP2, 30, 2, 26, 0, TEGRA20_CLK_DISP2),
780};
781
782static void __init tegra20_periph_clk_init(void)
783{
784 struct tegra_periph_init_data *data;
785 struct clk *clk;
786 unsigned int i;
787
788 /* ac97 */
789 clk = tegra_clk_register_periph_gate("ac97", "pll_a_out0",
790 TEGRA_PERIPH_ON_APB,
791 clk_base, 0, 3, periph_clk_enb_refcnt);
792 clks[TEGRA20_CLK_AC97] = clk;
793
794 /* emc */
795 clk = tegra20_clk_register_emc(clk_base + CLK_SOURCE_EMC, false);
796
797 clks[TEGRA20_CLK_EMC] = clk;
798
799 clk = tegra_clk_register_mc("mc", "emc", clk_base + CLK_SOURCE_EMC,
800 NULL);
801 clks[TEGRA20_CLK_MC] = clk;
802
803 /* dsi */
804 clk = tegra_clk_register_periph_gate("dsi", "pll_d_out0", 0,
805 clk_base, 0, TEGRA20_CLK_DSI,
806 periph_clk_enb_refcnt);
807 clks[TEGRA20_CLK_DSI] = clk;
808
809 /* pex */
810 clk = tegra_clk_register_periph_gate("pex", "clk_m", 0, clk_base, 0, 70,
811 periph_clk_enb_refcnt);
812 clks[TEGRA20_CLK_PEX] = clk;
813
814 /* dev1 OSC divider */
815 clk_register_divider(NULL, "dev1_osc_div", "clk_m",
816 0, clk_base + MISC_CLK_ENB, 22, 2,
817 CLK_DIVIDER_POWER_OF_TWO | CLK_DIVIDER_READ_ONLY,
818 NULL);
819
820 /* dev2 OSC divider */
821 clk_register_divider(NULL, "dev2_osc_div", "clk_m",
822 0, clk_base + MISC_CLK_ENB, 20, 2,
823 CLK_DIVIDER_POWER_OF_TWO | CLK_DIVIDER_READ_ONLY,
824 NULL);
825
826 /* cdev1 */
827 clk = tegra_clk_register_periph_gate("cdev1", "cdev1_mux", 0,
828 clk_base, 0, 94, periph_clk_enb_refcnt);
829 clks[TEGRA20_CLK_CDEV1] = clk;
830
831 /* cdev2 */
832 clk = tegra_clk_register_periph_gate("cdev2", "cdev2_mux", 0,
833 clk_base, 0, 93, periph_clk_enb_refcnt);
834 clks[TEGRA20_CLK_CDEV2] = clk;
835
836 /* csus */
837 clk = tegra_clk_register_periph_gate("csus", "csus_mux", 0,
838 clk_base, 0, TEGRA20_CLK_CSUS,
839 periph_clk_enb_refcnt);
840 clks[TEGRA20_CLK_CSUS] = clk;
841
842 for (i = 0; i < ARRAY_SIZE(tegra_periph_clk_list); i++) {
843 data = &tegra_periph_clk_list[i];
844 clk = tegra_clk_register_periph_data(clk_base, data);
845 clks[data->clk_id] = clk;
846 }
847
848 for (i = 0; i < ARRAY_SIZE(tegra_periph_nodiv_clk_list); i++) {
849 data = &tegra_periph_nodiv_clk_list[i];
850 clk = tegra_clk_register_periph_nodiv(data->name,
851 data->p.parent_names,
852 data->num_parents, &data->periph,
853 clk_base, data->offset);
854 clks[data->clk_id] = clk;
855 }
856
857 tegra_periph_clk_init(clk_base, pmc_base, tegra20_clks, &pll_p_params);
858}
859
860static void __init tegra20_osc_clk_init(void)
861{
862 struct clk *clk;
863 unsigned long input_freq;
864 unsigned int pll_ref_div;
865
866 input_freq = tegra20_clk_measure_input_freq();
867
868 /* clk_m */
869 clk = clk_register_fixed_rate(NULL, "clk_m", NULL, CLK_IGNORE_UNUSED,
870 input_freq);
871 clks[TEGRA20_CLK_CLK_M] = clk;
872
873 /* pll_ref */
874 pll_ref_div = tegra20_get_pll_ref_div();
875 clk = clk_register_fixed_factor(NULL, "pll_ref", "clk_m",
876 CLK_SET_RATE_PARENT, 1, pll_ref_div);
877 clks[TEGRA20_CLK_PLL_REF] = clk;
878}
879
880/* Tegra20 CPU clock and reset control functions */
881static void tegra20_wait_cpu_in_reset(u32 cpu)
882{
883 unsigned int reg;
884
885 do {
886 reg = readl(clk_base +
887 TEGRA_CLK_RST_CONTROLLER_RST_CPU_CMPLX_SET);
888 cpu_relax();
889 } while (!(reg & (1 << cpu))); /* check CPU been reset or not */
890
891 return;
892}
893
894static void tegra20_put_cpu_in_reset(u32 cpu)
895{
896 writel(CPU_RESET(cpu),
897 clk_base + TEGRA_CLK_RST_CONTROLLER_RST_CPU_CMPLX_SET);
898 dmb();
899}
900
901static void tegra20_cpu_out_of_reset(u32 cpu)
902{
903 writel(CPU_RESET(cpu),
904 clk_base + TEGRA_CLK_RST_CONTROLLER_RST_CPU_CMPLX_CLR);
905 wmb();
906}
907
908static void tegra20_enable_cpu_clock(u32 cpu)
909{
910 unsigned int reg;
911
912 reg = readl(clk_base + TEGRA_CLK_RST_CONTROLLER_CLK_CPU_CMPLX);
913 writel(reg & ~CPU_CLOCK(cpu),
914 clk_base + TEGRA_CLK_RST_CONTROLLER_CLK_CPU_CMPLX);
915 barrier();
916 reg = readl(clk_base + TEGRA_CLK_RST_CONTROLLER_CLK_CPU_CMPLX);
917}
918
919static void tegra20_disable_cpu_clock(u32 cpu)
920{
921 unsigned int reg;
922
923 reg = readl(clk_base + TEGRA_CLK_RST_CONTROLLER_CLK_CPU_CMPLX);
924 writel(reg | CPU_CLOCK(cpu),
925 clk_base + TEGRA_CLK_RST_CONTROLLER_CLK_CPU_CMPLX);
926}
927
928#ifdef CONFIG_PM_SLEEP
929static bool tegra20_cpu_rail_off_ready(void)
930{
931 unsigned int cpu_rst_status;
932
933 cpu_rst_status = readl(clk_base +
934 TEGRA_CLK_RST_CONTROLLER_RST_CPU_CMPLX_SET);
935
936 return !!(cpu_rst_status & 0x2);
937}
938
939static void tegra20_cpu_clock_suspend(void)
940{
941 /* switch coresite to clk_m, save off original source */
942 tegra20_cpu_clk_sctx.clk_csite_src =
943 readl(clk_base + CLK_SOURCE_CSITE);
944 writel(3<<30, clk_base + CLK_SOURCE_CSITE);
945
946 tegra20_cpu_clk_sctx.cpu_burst =
947 readl(clk_base + CCLK_BURST_POLICY);
948 tegra20_cpu_clk_sctx.pllx_base =
949 readl(clk_base + PLLX_BASE);
950 tegra20_cpu_clk_sctx.pllx_misc =
951 readl(clk_base + PLLX_MISC);
952 tegra20_cpu_clk_sctx.cclk_divider =
953 readl(clk_base + SUPER_CCLK_DIVIDER);
954}
955
956static void tegra20_cpu_clock_resume(void)
957{
958 unsigned int reg, policy;
959 u32 misc, base;
960
961 /* Is CPU complex already running on PLLX? */
962 reg = readl(clk_base + CCLK_BURST_POLICY);
963 policy = (reg >> CCLK_BURST_POLICY_SHIFT) & 0xF;
964
965 if (policy == CCLK_IDLE_POLICY)
966 reg = (reg >> CCLK_IDLE_POLICY_SHIFT) & 0xF;
967 else if (policy == CCLK_RUN_POLICY)
968 reg = (reg >> CCLK_RUN_POLICY_SHIFT) & 0xF;
969 else
970 BUG();
971
972 if (reg != CCLK_BURST_POLICY_PLLX) {
973 misc = readl_relaxed(clk_base + PLLX_MISC);
974 base = readl_relaxed(clk_base + PLLX_BASE);
975
976 if (misc != tegra20_cpu_clk_sctx.pllx_misc ||
977 base != tegra20_cpu_clk_sctx.pllx_base) {
978 /* restore PLLX settings if CPU is on different PLL */
979 writel(tegra20_cpu_clk_sctx.pllx_misc,
980 clk_base + PLLX_MISC);
981 writel(tegra20_cpu_clk_sctx.pllx_base,
982 clk_base + PLLX_BASE);
983
984 /* wait for PLL stabilization if PLLX was enabled */
985 if (tegra20_cpu_clk_sctx.pllx_base & (1 << 30))
986 udelay(300);
987 }
988 }
989
990 /*
991 * Restore original burst policy setting for calls resulting from CPU
992 * LP2 in idle or system suspend.
993 */
994 writel(tegra20_cpu_clk_sctx.cclk_divider,
995 clk_base + SUPER_CCLK_DIVIDER);
996 writel(tegra20_cpu_clk_sctx.cpu_burst,
997 clk_base + CCLK_BURST_POLICY);
998
999 writel(tegra20_cpu_clk_sctx.clk_csite_src,
1000 clk_base + CLK_SOURCE_CSITE);
1001}
1002#endif
1003
1004static struct tegra_cpu_car_ops tegra20_cpu_car_ops = {
1005 .wait_for_reset = tegra20_wait_cpu_in_reset,
1006 .put_in_reset = tegra20_put_cpu_in_reset,
1007 .out_of_reset = tegra20_cpu_out_of_reset,
1008 .enable_clock = tegra20_enable_cpu_clock,
1009 .disable_clock = tegra20_disable_cpu_clock,
1010#ifdef CONFIG_PM_SLEEP
1011 .rail_off_ready = tegra20_cpu_rail_off_ready,
1012 .suspend = tegra20_cpu_clock_suspend,
1013 .resume = tegra20_cpu_clock_resume,
1014#endif
1015};
1016
1017static struct tegra_clk_init_table init_table[] = {
1018 { TEGRA20_CLK_PLL_P, TEGRA20_CLK_CLK_MAX, 216000000, 1 },
1019 { TEGRA20_CLK_PLL_P_OUT1, TEGRA20_CLK_CLK_MAX, 28800000, 1 },
1020 { TEGRA20_CLK_PLL_P_OUT2, TEGRA20_CLK_CLK_MAX, 48000000, 1 },
1021 { TEGRA20_CLK_PLL_P_OUT3, TEGRA20_CLK_CLK_MAX, 72000000, 1 },
1022 { TEGRA20_CLK_PLL_P_OUT4, TEGRA20_CLK_CLK_MAX, 24000000, 1 },
1023 { TEGRA20_CLK_PLL_C, TEGRA20_CLK_CLK_MAX, 600000000, 0 },
1024 { TEGRA20_CLK_PLL_C_OUT1, TEGRA20_CLK_CLK_MAX, 120000000, 0 },
1025 { TEGRA20_CLK_SCLK, TEGRA20_CLK_PLL_C_OUT1, 120000000, 0 },
1026 { TEGRA20_CLK_HCLK, TEGRA20_CLK_CLK_MAX, 120000000, 0 },
1027 { TEGRA20_CLK_PCLK, TEGRA20_CLK_CLK_MAX, 60000000, 0 },
1028 { TEGRA20_CLK_CSITE, TEGRA20_CLK_CLK_MAX, 0, 1 },
1029 { TEGRA20_CLK_CCLK, TEGRA20_CLK_CLK_MAX, 0, 1 },
1030 { TEGRA20_CLK_UARTA, TEGRA20_CLK_PLL_P, 0, 0 },
1031 { TEGRA20_CLK_UARTB, TEGRA20_CLK_PLL_P, 0, 0 },
1032 { TEGRA20_CLK_UARTC, TEGRA20_CLK_PLL_P, 0, 0 },
1033 { TEGRA20_CLK_UARTD, TEGRA20_CLK_PLL_P, 0, 0 },
1034 { TEGRA20_CLK_UARTE, TEGRA20_CLK_PLL_P, 0, 0 },
1035 { TEGRA20_CLK_PLL_A, TEGRA20_CLK_CLK_MAX, 56448000, 0 },
1036 { TEGRA20_CLK_PLL_A_OUT0, TEGRA20_CLK_CLK_MAX, 11289600, 0 },
1037 { TEGRA20_CLK_I2S1, TEGRA20_CLK_PLL_A_OUT0, 11289600, 0 },
1038 { TEGRA20_CLK_I2S2, TEGRA20_CLK_PLL_A_OUT0, 11289600, 0 },
1039 { TEGRA20_CLK_SDMMC1, TEGRA20_CLK_PLL_P, 48000000, 0 },
1040 { TEGRA20_CLK_SDMMC3, TEGRA20_CLK_PLL_P, 48000000, 0 },
1041 { TEGRA20_CLK_SDMMC4, TEGRA20_CLK_PLL_P, 48000000, 0 },
1042 { TEGRA20_CLK_SPI, TEGRA20_CLK_PLL_P, 20000000, 0 },
1043 { TEGRA20_CLK_SBC1, TEGRA20_CLK_PLL_P, 100000000, 0 },
1044 { TEGRA20_CLK_SBC2, TEGRA20_CLK_PLL_P, 100000000, 0 },
1045 { TEGRA20_CLK_SBC3, TEGRA20_CLK_PLL_P, 100000000, 0 },
1046 { TEGRA20_CLK_SBC4, TEGRA20_CLK_PLL_P, 100000000, 0 },
1047 { TEGRA20_CLK_HOST1X, TEGRA20_CLK_PLL_C, 150000000, 0 },
1048 { TEGRA20_CLK_GR2D, TEGRA20_CLK_PLL_C, 300000000, 0 },
1049 { TEGRA20_CLK_GR3D, TEGRA20_CLK_PLL_C, 300000000, 0 },
1050 { TEGRA20_CLK_VDE, TEGRA20_CLK_PLL_C, 300000000, 0 },
1051 { TEGRA20_CLK_PWM, TEGRA20_CLK_PLL_P, 48000000, 0 },
1052 /* must be the last entry */
1053 { TEGRA20_CLK_CLK_MAX, TEGRA20_CLK_CLK_MAX, 0, 0 },
1054};
1055
1056/*
1057 * Some clocks may be used by different drivers depending on the board
1058 * configuration. List those here to register them twice in the clock lookup
1059 * table under two names.
1060 */
1061static struct tegra_clk_duplicate tegra_clk_duplicates[] = {
1062 TEGRA_CLK_DUPLICATE(TEGRA20_CLK_USBD, "utmip-pad", NULL),
1063 TEGRA_CLK_DUPLICATE(TEGRA20_CLK_USBD, "tegra-ehci.0", NULL),
1064 TEGRA_CLK_DUPLICATE(TEGRA20_CLK_USBD, "tegra-otg", NULL),
1065 TEGRA_CLK_DUPLICATE(TEGRA20_CLK_CCLK, NULL, "cpu"),
1066 /* must be the last entry */
1067 TEGRA_CLK_DUPLICATE(TEGRA20_CLK_CLK_MAX, NULL, NULL),
1068};
1069
1070static const struct of_device_id pmc_match[] __initconst = {
1071 { .compatible = "nvidia,tegra20-pmc" },
1072 { },
1073};
1074
1075static bool tegra20_car_initialized;
1076
1077static struct clk *tegra20_clk_src_onecell_get(struct of_phandle_args *clkspec,
1078 void *data)
1079{
1080 struct clk_hw *parent_hw;
1081 struct clk_hw *hw;
1082 struct clk *clk;
1083
1084 /*
1085 * Timer clocks are needed early, the rest of the clocks shouldn't be
1086 * available to device drivers until clock tree is fully initialized.
1087 */
1088 if (clkspec->args[0] != TEGRA20_CLK_RTC &&
1089 clkspec->args[0] != TEGRA20_CLK_TWD &&
1090 clkspec->args[0] != TEGRA20_CLK_TIMER &&
1091 !tegra20_car_initialized)
1092 return ERR_PTR(-EPROBE_DEFER);
1093
1094 clk = of_clk_src_onecell_get(clkspec, data);
1095 if (IS_ERR(clk))
1096 return clk;
1097
1098 hw = __clk_get_hw(clk);
1099
1100 /*
1101 * Tegra20 CDEV1, CDEV2 and CSUS clocks are a bit special case, their
1102 * parent clock is created by the pinctrl driver. It is possible for
1103 * clk user to request these clocks before pinctrl driver got probed
1104 * and hence user will get an orphaned clock. That might be undesirable
1105 * because user may expect parent clock to be enabled by the child.
1106 */
1107 if (clkspec->args[0] == TEGRA20_CLK_CDEV1 ||
1108 clkspec->args[0] == TEGRA20_CLK_CDEV2 ||
1109 clkspec->args[0] == TEGRA20_CLK_CSUS) {
1110 parent_hw = clk_hw_get_parent(hw);
1111 if (!parent_hw)
1112 return ERR_PTR(-EPROBE_DEFER);
1113 }
1114
1115 if (clkspec->args[0] == TEGRA20_CLK_EMC) {
1116 if (!tegra20_clk_emc_driver_available(hw))
1117 return ERR_PTR(-EPROBE_DEFER);
1118 }
1119
1120 return clk;
1121}
1122
1123static void __init tegra20_clock_init(struct device_node *np)
1124{
1125 struct device_node *node;
1126
1127 clk_base = of_iomap(np, 0);
1128 if (!clk_base) {
1129 pr_err("Can't map CAR registers\n");
1130 BUG();
1131 }
1132
1133 node = of_find_matching_node(NULL, pmc_match);
1134 if (!node) {
1135 pr_err("Failed to find pmc node\n");
1136 BUG();
1137 }
1138
1139 pmc_base = of_iomap(node, 0);
1140 of_node_put(node);
1141 if (!pmc_base) {
1142 pr_err("Can't map pmc registers\n");
1143 BUG();
1144 }
1145
1146 clks = tegra_clk_init(clk_base, TEGRA20_CLK_CLK_MAX,
1147 TEGRA20_CLK_PERIPH_BANKS);
1148 if (!clks)
1149 return;
1150
1151 tegra20_osc_clk_init();
1152 tegra_fixed_clk_init(tegra20_clks);
1153 tegra20_pll_init();
1154 tegra20_super_clk_init();
1155 tegra_super_clk_gen4_init(clk_base, pmc_base, tegra20_clks, NULL);
1156 tegra20_periph_clk_init();
1157 tegra20_audio_clk_init();
1158
1159 tegra_init_dup_clks(tegra_clk_duplicates, clks, TEGRA20_CLK_CLK_MAX);
1160
1161 tegra_add_of_provider(np, tegra20_clk_src_onecell_get);
1162
1163 tegra_cpu_car_ops = &tegra20_cpu_car_ops;
1164}
1165CLK_OF_DECLARE_DRIVER(tegra20, "nvidia,tegra20-car", tegra20_clock_init);
1166
1167/*
1168 * Clocks that use runtime PM can't be created at the tegra20_clock_init
1169 * time because drivers' base isn't initialized yet, and thus platform
1170 * devices can't be created for the clocks. Hence we need to split the
1171 * registration of the clocks into two phases. The first phase registers
1172 * essential clocks which don't require RPM and are actually used during
1173 * early boot. The second phase registers clocks which use RPM and this
1174 * is done when device drivers' core API is ready.
1175 */
1176static int tegra20_car_probe(struct platform_device *pdev)
1177{
1178 struct clk *clk;
1179
1180 clk = tegra_clk_register_super_mux("sclk", sclk_parents,
1181 ARRAY_SIZE(sclk_parents),
1182 CLK_SET_RATE_PARENT | CLK_IS_CRITICAL,
1183 clk_base + SCLK_BURST_POLICY, 0, 4, 0, 0, NULL);
1184 clks[TEGRA20_CLK_SCLK] = clk;
1185
1186 tegra_register_devclks(devclks, ARRAY_SIZE(devclks));
1187 tegra_init_from_table(init_table, clks, TEGRA20_CLK_CLK_MAX);
1188 tegra20_car_initialized = true;
1189
1190 return 0;
1191}
1192
1193static const struct of_device_id tegra20_car_match[] = {
1194 { .compatible = "nvidia,tegra20-car" },
1195 { }
1196};
1197
1198static struct platform_driver tegra20_car_driver = {
1199 .driver = {
1200 .name = "tegra20-car",
1201 .of_match_table = tegra20_car_match,
1202 .suppress_bind_attrs = true,
1203 },
1204 .probe = tegra20_car_probe,
1205};
1206builtin_platform_driver(tegra20_car_driver);