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75fabc3f | 1 | /* |
41691b88 | 2 | * Copyright (C) 2010,2015 Broadcom |
75fabc3f SA |
3 | * Copyright (C) 2012 Stephen Warren |
4 | * | |
5 | * This program is free software; you can redistribute it and/or modify | |
6 | * it under the terms of the GNU General Public License as published by | |
7 | * the Free Software Foundation; either version 2 of the License, or | |
8 | * (at your option) any later version. | |
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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
18 | */ | |
19 | ||
41691b88 EA |
20 | /** |
21 | * DOC: BCM2835 CPRMAN (clock manager for the "audio" domain) | |
22 | * | |
23 | * The clock tree on the 2835 has several levels. There's a root | |
24 | * oscillator running at 19.2Mhz. After the oscillator there are 5 | |
25 | * PLLs, roughly divided as "camera", "ARM", "core", "DSI displays", | |
26 | * and "HDMI displays". Those 5 PLLs each can divide their output to | |
27 | * produce up to 4 channels. Finally, there is the level of clocks to | |
28 | * be consumed by other hardware components (like "H264" or "HDMI | |
29 | * state machine"), which divide off of some subset of the PLL | |
30 | * channels. | |
31 | * | |
32 | * All of the clocks in the tree are exposed in the DT, because the DT | |
33 | * may want to make assignments of the final layer of clocks to the | |
34 | * PLL channels, and some components of the hardware will actually | |
35 | * skip layers of the tree (for example, the pixel clock comes | |
36 | * directly from the PLLH PIX channel without using a CM_*CTL clock | |
37 | * generator). | |
38 | */ | |
39 | ||
75fabc3f SA |
40 | #include <linux/clk-provider.h> |
41 | #include <linux/clkdev.h> | |
42 | #include <linux/clk/bcm2835.h> | |
41691b88 | 43 | #include <linux/module.h> |
526d239c | 44 | #include <linux/of.h> |
41691b88 EA |
45 | #include <linux/platform_device.h> |
46 | #include <linux/slab.h> | |
47 | #include <dt-bindings/clock/bcm2835.h> | |
48 | ||
49 | #define CM_PASSWORD 0x5a000000 | |
50 | ||
51 | #define CM_GNRICCTL 0x000 | |
52 | #define CM_GNRICDIV 0x004 | |
53 | # define CM_DIV_FRAC_BITS 12 | |
959ca92a | 54 | # define CM_DIV_FRAC_MASK GENMASK(CM_DIV_FRAC_BITS - 1, 0) |
41691b88 EA |
55 | |
56 | #define CM_VPUCTL 0x008 | |
57 | #define CM_VPUDIV 0x00c | |
58 | #define CM_SYSCTL 0x010 | |
59 | #define CM_SYSDIV 0x014 | |
60 | #define CM_PERIACTL 0x018 | |
61 | #define CM_PERIADIV 0x01c | |
62 | #define CM_PERIICTL 0x020 | |
63 | #define CM_PERIIDIV 0x024 | |
64 | #define CM_H264CTL 0x028 | |
65 | #define CM_H264DIV 0x02c | |
66 | #define CM_ISPCTL 0x030 | |
67 | #define CM_ISPDIV 0x034 | |
68 | #define CM_V3DCTL 0x038 | |
69 | #define CM_V3DDIV 0x03c | |
70 | #define CM_CAM0CTL 0x040 | |
71 | #define CM_CAM0DIV 0x044 | |
72 | #define CM_CAM1CTL 0x048 | |
73 | #define CM_CAM1DIV 0x04c | |
74 | #define CM_CCP2CTL 0x050 | |
75 | #define CM_CCP2DIV 0x054 | |
76 | #define CM_DSI0ECTL 0x058 | |
77 | #define CM_DSI0EDIV 0x05c | |
78 | #define CM_DSI0PCTL 0x060 | |
79 | #define CM_DSI0PDIV 0x064 | |
80 | #define CM_DPICTL 0x068 | |
81 | #define CM_DPIDIV 0x06c | |
82 | #define CM_GP0CTL 0x070 | |
83 | #define CM_GP0DIV 0x074 | |
84 | #define CM_GP1CTL 0x078 | |
85 | #define CM_GP1DIV 0x07c | |
86 | #define CM_GP2CTL 0x080 | |
87 | #define CM_GP2DIV 0x084 | |
88 | #define CM_HSMCTL 0x088 | |
89 | #define CM_HSMDIV 0x08c | |
90 | #define CM_OTPCTL 0x090 | |
91 | #define CM_OTPDIV 0x094 | |
2103a215 MS |
92 | #define CM_PCMCTL 0x098 |
93 | #define CM_PCMDIV 0x09c | |
41691b88 EA |
94 | #define CM_PWMCTL 0x0a0 |
95 | #define CM_PWMDIV 0x0a4 | |
2103a215 MS |
96 | #define CM_SLIMCTL 0x0a8 |
97 | #define CM_SLIMDIV 0x0ac | |
41691b88 EA |
98 | #define CM_SMICTL 0x0b0 |
99 | #define CM_SMIDIV 0x0b4 | |
2103a215 MS |
100 | /* no definition for 0x0b8 and 0x0bc */ |
101 | #define CM_TCNTCTL 0x0c0 | |
102 | #define CM_TCNTDIV 0x0c4 | |
103 | #define CM_TECCTL 0x0c8 | |
104 | #define CM_TECDIV 0x0cc | |
105 | #define CM_TD0CTL 0x0d0 | |
106 | #define CM_TD0DIV 0x0d4 | |
107 | #define CM_TD1CTL 0x0d8 | |
108 | #define CM_TD1DIV 0x0dc | |
41691b88 EA |
109 | #define CM_TSENSCTL 0x0e0 |
110 | #define CM_TSENSDIV 0x0e4 | |
111 | #define CM_TIMERCTL 0x0e8 | |
112 | #define CM_TIMERDIV 0x0ec | |
113 | #define CM_UARTCTL 0x0f0 | |
114 | #define CM_UARTDIV 0x0f4 | |
115 | #define CM_VECCTL 0x0f8 | |
116 | #define CM_VECDIV 0x0fc | |
117 | #define CM_PULSECTL 0x190 | |
118 | #define CM_PULSEDIV 0x194 | |
119 | #define CM_SDCCTL 0x1a8 | |
120 | #define CM_SDCDIV 0x1ac | |
121 | #define CM_ARMCTL 0x1b0 | |
122 | #define CM_EMMCCTL 0x1c0 | |
123 | #define CM_EMMCDIV 0x1c4 | |
124 | ||
125 | /* General bits for the CM_*CTL regs */ | |
126 | # define CM_ENABLE BIT(4) | |
127 | # define CM_KILL BIT(5) | |
128 | # define CM_GATE_BIT 6 | |
129 | # define CM_GATE BIT(CM_GATE_BIT) | |
130 | # define CM_BUSY BIT(7) | |
131 | # define CM_BUSYD BIT(8) | |
959ca92a | 132 | # define CM_FRAC BIT(9) |
41691b88 EA |
133 | # define CM_SRC_SHIFT 0 |
134 | # define CM_SRC_BITS 4 | |
135 | # define CM_SRC_MASK 0xf | |
136 | # define CM_SRC_GND 0 | |
137 | # define CM_SRC_OSC 1 | |
138 | # define CM_SRC_TESTDEBUG0 2 | |
139 | # define CM_SRC_TESTDEBUG1 3 | |
140 | # define CM_SRC_PLLA_CORE 4 | |
141 | # define CM_SRC_PLLA_PER 4 | |
142 | # define CM_SRC_PLLC_CORE0 5 | |
143 | # define CM_SRC_PLLC_PER 5 | |
144 | # define CM_SRC_PLLC_CORE1 8 | |
145 | # define CM_SRC_PLLD_CORE 6 | |
146 | # define CM_SRC_PLLD_PER 6 | |
147 | # define CM_SRC_PLLH_AUX 7 | |
148 | # define CM_SRC_PLLC_CORE1 8 | |
149 | # define CM_SRC_PLLC_CORE2 9 | |
150 | ||
151 | #define CM_OSCCOUNT 0x100 | |
152 | ||
153 | #define CM_PLLA 0x104 | |
154 | # define CM_PLL_ANARST BIT(8) | |
155 | # define CM_PLLA_HOLDPER BIT(7) | |
156 | # define CM_PLLA_LOADPER BIT(6) | |
157 | # define CM_PLLA_HOLDCORE BIT(5) | |
158 | # define CM_PLLA_LOADCORE BIT(4) | |
159 | # define CM_PLLA_HOLDCCP2 BIT(3) | |
160 | # define CM_PLLA_LOADCCP2 BIT(2) | |
161 | # define CM_PLLA_HOLDDSI0 BIT(1) | |
162 | # define CM_PLLA_LOADDSI0 BIT(0) | |
163 | ||
164 | #define CM_PLLC 0x108 | |
165 | # define CM_PLLC_HOLDPER BIT(7) | |
166 | # define CM_PLLC_LOADPER BIT(6) | |
167 | # define CM_PLLC_HOLDCORE2 BIT(5) | |
168 | # define CM_PLLC_LOADCORE2 BIT(4) | |
169 | # define CM_PLLC_HOLDCORE1 BIT(3) | |
170 | # define CM_PLLC_LOADCORE1 BIT(2) | |
171 | # define CM_PLLC_HOLDCORE0 BIT(1) | |
172 | # define CM_PLLC_LOADCORE0 BIT(0) | |
173 | ||
174 | #define CM_PLLD 0x10c | |
175 | # define CM_PLLD_HOLDPER BIT(7) | |
176 | # define CM_PLLD_LOADPER BIT(6) | |
177 | # define CM_PLLD_HOLDCORE BIT(5) | |
178 | # define CM_PLLD_LOADCORE BIT(4) | |
179 | # define CM_PLLD_HOLDDSI1 BIT(3) | |
180 | # define CM_PLLD_LOADDSI1 BIT(2) | |
181 | # define CM_PLLD_HOLDDSI0 BIT(1) | |
182 | # define CM_PLLD_LOADDSI0 BIT(0) | |
183 | ||
184 | #define CM_PLLH 0x110 | |
185 | # define CM_PLLH_LOADRCAL BIT(2) | |
186 | # define CM_PLLH_LOADAUX BIT(1) | |
187 | # define CM_PLLH_LOADPIX BIT(0) | |
188 | ||
189 | #define CM_LOCK 0x114 | |
190 | # define CM_LOCK_FLOCKH BIT(12) | |
191 | # define CM_LOCK_FLOCKD BIT(11) | |
192 | # define CM_LOCK_FLOCKC BIT(10) | |
193 | # define CM_LOCK_FLOCKB BIT(9) | |
194 | # define CM_LOCK_FLOCKA BIT(8) | |
195 | ||
196 | #define CM_EVENT 0x118 | |
197 | #define CM_DSI1ECTL 0x158 | |
198 | #define CM_DSI1EDIV 0x15c | |
199 | #define CM_DSI1PCTL 0x160 | |
200 | #define CM_DSI1PDIV 0x164 | |
201 | #define CM_DFTCTL 0x168 | |
202 | #define CM_DFTDIV 0x16c | |
203 | ||
204 | #define CM_PLLB 0x170 | |
205 | # define CM_PLLB_HOLDARM BIT(1) | |
206 | # define CM_PLLB_LOADARM BIT(0) | |
207 | ||
208 | #define A2W_PLLA_CTRL 0x1100 | |
209 | #define A2W_PLLC_CTRL 0x1120 | |
210 | #define A2W_PLLD_CTRL 0x1140 | |
211 | #define A2W_PLLH_CTRL 0x1160 | |
212 | #define A2W_PLLB_CTRL 0x11e0 | |
213 | # define A2W_PLL_CTRL_PRST_DISABLE BIT(17) | |
214 | # define A2W_PLL_CTRL_PWRDN BIT(16) | |
215 | # define A2W_PLL_CTRL_PDIV_MASK 0x000007000 | |
216 | # define A2W_PLL_CTRL_PDIV_SHIFT 12 | |
217 | # define A2W_PLL_CTRL_NDIV_MASK 0x0000003ff | |
218 | # define A2W_PLL_CTRL_NDIV_SHIFT 0 | |
219 | ||
220 | #define A2W_PLLA_ANA0 0x1010 | |
221 | #define A2W_PLLC_ANA0 0x1030 | |
222 | #define A2W_PLLD_ANA0 0x1050 | |
223 | #define A2W_PLLH_ANA0 0x1070 | |
224 | #define A2W_PLLB_ANA0 0x10f0 | |
225 | ||
226 | #define A2W_PLL_KA_SHIFT 7 | |
227 | #define A2W_PLL_KA_MASK GENMASK(9, 7) | |
228 | #define A2W_PLL_KI_SHIFT 19 | |
229 | #define A2W_PLL_KI_MASK GENMASK(21, 19) | |
230 | #define A2W_PLL_KP_SHIFT 15 | |
231 | #define A2W_PLL_KP_MASK GENMASK(18, 15) | |
232 | ||
233 | #define A2W_PLLH_KA_SHIFT 19 | |
234 | #define A2W_PLLH_KA_MASK GENMASK(21, 19) | |
235 | #define A2W_PLLH_KI_LOW_SHIFT 22 | |
236 | #define A2W_PLLH_KI_LOW_MASK GENMASK(23, 22) | |
237 | #define A2W_PLLH_KI_HIGH_SHIFT 0 | |
238 | #define A2W_PLLH_KI_HIGH_MASK GENMASK(0, 0) | |
239 | #define A2W_PLLH_KP_SHIFT 1 | |
240 | #define A2W_PLLH_KP_MASK GENMASK(4, 1) | |
241 | ||
242 | #define A2W_XOSC_CTRL 0x1190 | |
243 | # define A2W_XOSC_CTRL_PLLB_ENABLE BIT(7) | |
244 | # define A2W_XOSC_CTRL_PLLA_ENABLE BIT(6) | |
245 | # define A2W_XOSC_CTRL_PLLD_ENABLE BIT(5) | |
246 | # define A2W_XOSC_CTRL_DDR_ENABLE BIT(4) | |
247 | # define A2W_XOSC_CTRL_CPR1_ENABLE BIT(3) | |
248 | # define A2W_XOSC_CTRL_USB_ENABLE BIT(2) | |
249 | # define A2W_XOSC_CTRL_HDMI_ENABLE BIT(1) | |
250 | # define A2W_XOSC_CTRL_PLLC_ENABLE BIT(0) | |
251 | ||
252 | #define A2W_PLLA_FRAC 0x1200 | |
253 | #define A2W_PLLC_FRAC 0x1220 | |
254 | #define A2W_PLLD_FRAC 0x1240 | |
255 | #define A2W_PLLH_FRAC 0x1260 | |
256 | #define A2W_PLLB_FRAC 0x12e0 | |
257 | # define A2W_PLL_FRAC_MASK ((1 << A2W_PLL_FRAC_BITS) - 1) | |
258 | # define A2W_PLL_FRAC_BITS 20 | |
259 | ||
260 | #define A2W_PLL_CHANNEL_DISABLE BIT(8) | |
261 | #define A2W_PLL_DIV_BITS 8 | |
262 | #define A2W_PLL_DIV_SHIFT 0 | |
263 | ||
264 | #define A2W_PLLA_DSI0 0x1300 | |
265 | #define A2W_PLLA_CORE 0x1400 | |
266 | #define A2W_PLLA_PER 0x1500 | |
267 | #define A2W_PLLA_CCP2 0x1600 | |
268 | ||
269 | #define A2W_PLLC_CORE2 0x1320 | |
270 | #define A2W_PLLC_CORE1 0x1420 | |
271 | #define A2W_PLLC_PER 0x1520 | |
272 | #define A2W_PLLC_CORE0 0x1620 | |
273 | ||
274 | #define A2W_PLLD_DSI0 0x1340 | |
275 | #define A2W_PLLD_CORE 0x1440 | |
276 | #define A2W_PLLD_PER 0x1540 | |
277 | #define A2W_PLLD_DSI1 0x1640 | |
278 | ||
279 | #define A2W_PLLH_AUX 0x1360 | |
280 | #define A2W_PLLH_RCAL 0x1460 | |
281 | #define A2W_PLLH_PIX 0x1560 | |
282 | #define A2W_PLLH_STS 0x1660 | |
283 | ||
284 | #define A2W_PLLH_CTRLR 0x1960 | |
285 | #define A2W_PLLH_FRACR 0x1a60 | |
286 | #define A2W_PLLH_AUXR 0x1b60 | |
287 | #define A2W_PLLH_RCALR 0x1c60 | |
288 | #define A2W_PLLH_PIXR 0x1d60 | |
289 | #define A2W_PLLH_STSR 0x1e60 | |
290 | ||
291 | #define A2W_PLLB_ARM 0x13e0 | |
292 | #define A2W_PLLB_SP0 0x14e0 | |
293 | #define A2W_PLLB_SP1 0x15e0 | |
294 | #define A2W_PLLB_SP2 0x16e0 | |
295 | ||
296 | #define LOCK_TIMEOUT_NS 100000000 | |
297 | #define BCM2835_MAX_FB_RATE 1750000000u | |
298 | ||
299 | struct bcm2835_cprman { | |
300 | struct device *dev; | |
301 | void __iomem *regs; | |
302 | spinlock_t regs_lock; | |
303 | const char *osc_name; | |
304 | ||
305 | struct clk_onecell_data onecell; | |
306 | struct clk *clks[BCM2835_CLOCK_COUNT]; | |
307 | }; | |
308 | ||
309 | static inline void cprman_write(struct bcm2835_cprman *cprman, u32 reg, u32 val) | |
310 | { | |
311 | writel(CM_PASSWORD | val, cprman->regs + reg); | |
312 | } | |
313 | ||
314 | static inline u32 cprman_read(struct bcm2835_cprman *cprman, u32 reg) | |
315 | { | |
316 | return readl(cprman->regs + reg); | |
317 | } | |
526d239c | 318 | |
75fabc3f SA |
319 | /* |
320 | * These are fixed clocks. They're probably not all root clocks and it may | |
321 | * be possible to turn them on and off but until this is mapped out better | |
322 | * it's the only way they can be used. | |
323 | */ | |
324 | void __init bcm2835_init_clocks(void) | |
325 | { | |
326 | struct clk *clk; | |
327 | int ret; | |
328 | ||
bd41aa67 | 329 | clk = clk_register_fixed_rate(NULL, "apb_pclk", NULL, 0, 126000000); |
0de9f23a | 330 | if (IS_ERR(clk)) |
75fabc3f SA |
331 | pr_err("apb_pclk not registered\n"); |
332 | ||
bd41aa67 | 333 | clk = clk_register_fixed_rate(NULL, "uart0_pclk", NULL, 0, 3000000); |
0de9f23a | 334 | if (IS_ERR(clk)) |
75fabc3f SA |
335 | pr_err("uart0_pclk not registered\n"); |
336 | ret = clk_register_clkdev(clk, NULL, "20201000.uart"); | |
337 | if (ret) | |
338 | pr_err("uart0_pclk alias not registered\n"); | |
339 | ||
bd41aa67 | 340 | clk = clk_register_fixed_rate(NULL, "uart1_pclk", NULL, 0, 125000000); |
0de9f23a | 341 | if (IS_ERR(clk)) |
75fabc3f SA |
342 | pr_err("uart1_pclk not registered\n"); |
343 | ret = clk_register_clkdev(clk, NULL, "20215000.uart"); | |
344 | if (ret) | |
686ea585 | 345 | pr_err("uart1_pclk alias not registered\n"); |
75fabc3f | 346 | } |
41691b88 EA |
347 | |
348 | struct bcm2835_pll_data { | |
349 | const char *name; | |
350 | u32 cm_ctrl_reg; | |
351 | u32 a2w_ctrl_reg; | |
352 | u32 frac_reg; | |
353 | u32 ana_reg_base; | |
354 | u32 reference_enable_mask; | |
355 | /* Bit in CM_LOCK to indicate when the PLL has locked. */ | |
356 | u32 lock_mask; | |
357 | ||
358 | const struct bcm2835_pll_ana_bits *ana; | |
359 | ||
360 | unsigned long min_rate; | |
361 | unsigned long max_rate; | |
362 | /* | |
363 | * Highest rate for the VCO before we have to use the | |
364 | * pre-divide-by-2. | |
365 | */ | |
366 | unsigned long max_fb_rate; | |
367 | }; | |
368 | ||
369 | struct bcm2835_pll_ana_bits { | |
370 | u32 mask0; | |
371 | u32 set0; | |
372 | u32 mask1; | |
373 | u32 set1; | |
374 | u32 mask3; | |
375 | u32 set3; | |
376 | u32 fb_prediv_mask; | |
377 | }; | |
378 | ||
379 | static const struct bcm2835_pll_ana_bits bcm2835_ana_default = { | |
380 | .mask0 = 0, | |
381 | .set0 = 0, | |
382 | .mask1 = ~(A2W_PLL_KI_MASK | A2W_PLL_KP_MASK), | |
383 | .set1 = (2 << A2W_PLL_KI_SHIFT) | (8 << A2W_PLL_KP_SHIFT), | |
384 | .mask3 = ~A2W_PLL_KA_MASK, | |
385 | .set3 = (2 << A2W_PLL_KA_SHIFT), | |
386 | .fb_prediv_mask = BIT(14), | |
387 | }; | |
388 | ||
389 | static const struct bcm2835_pll_ana_bits bcm2835_ana_pllh = { | |
390 | .mask0 = ~(A2W_PLLH_KA_MASK | A2W_PLLH_KI_LOW_MASK), | |
391 | .set0 = (2 << A2W_PLLH_KA_SHIFT) | (2 << A2W_PLLH_KI_LOW_SHIFT), | |
392 | .mask1 = ~(A2W_PLLH_KI_HIGH_MASK | A2W_PLLH_KP_MASK), | |
393 | .set1 = (6 << A2W_PLLH_KP_SHIFT), | |
394 | .mask3 = 0, | |
395 | .set3 = 0, | |
396 | .fb_prediv_mask = BIT(11), | |
397 | }; | |
398 | ||
399 | /* | |
400 | * PLLA is the auxiliary PLL, used to drive the CCP2 (Compact Camera | |
401 | * Port 2) transmitter clock. | |
402 | * | |
403 | * It is in the PX LDO power domain, which is on when the AUDIO domain | |
404 | * is on. | |
405 | */ | |
406 | static const struct bcm2835_pll_data bcm2835_plla_data = { | |
407 | .name = "plla", | |
408 | .cm_ctrl_reg = CM_PLLA, | |
409 | .a2w_ctrl_reg = A2W_PLLA_CTRL, | |
410 | .frac_reg = A2W_PLLA_FRAC, | |
411 | .ana_reg_base = A2W_PLLA_ANA0, | |
412 | .reference_enable_mask = A2W_XOSC_CTRL_PLLA_ENABLE, | |
413 | .lock_mask = CM_LOCK_FLOCKA, | |
414 | ||
415 | .ana = &bcm2835_ana_default, | |
416 | ||
417 | .min_rate = 600000000u, | |
418 | .max_rate = 2400000000u, | |
419 | .max_fb_rate = BCM2835_MAX_FB_RATE, | |
420 | }; | |
421 | ||
422 | /* PLLB is used for the ARM's clock. */ | |
423 | static const struct bcm2835_pll_data bcm2835_pllb_data = { | |
424 | .name = "pllb", | |
425 | .cm_ctrl_reg = CM_PLLB, | |
426 | .a2w_ctrl_reg = A2W_PLLB_CTRL, | |
427 | .frac_reg = A2W_PLLB_FRAC, | |
428 | .ana_reg_base = A2W_PLLB_ANA0, | |
429 | .reference_enable_mask = A2W_XOSC_CTRL_PLLB_ENABLE, | |
430 | .lock_mask = CM_LOCK_FLOCKB, | |
431 | ||
432 | .ana = &bcm2835_ana_default, | |
433 | ||
434 | .min_rate = 600000000u, | |
435 | .max_rate = 3000000000u, | |
436 | .max_fb_rate = BCM2835_MAX_FB_RATE, | |
437 | }; | |
438 | ||
439 | /* | |
440 | * PLLC is the core PLL, used to drive the core VPU clock. | |
441 | * | |
442 | * It is in the PX LDO power domain, which is on when the AUDIO domain | |
443 | * is on. | |
444 | */ | |
445 | static const struct bcm2835_pll_data bcm2835_pllc_data = { | |
446 | .name = "pllc", | |
447 | .cm_ctrl_reg = CM_PLLC, | |
448 | .a2w_ctrl_reg = A2W_PLLC_CTRL, | |
449 | .frac_reg = A2W_PLLC_FRAC, | |
450 | .ana_reg_base = A2W_PLLC_ANA0, | |
451 | .reference_enable_mask = A2W_XOSC_CTRL_PLLC_ENABLE, | |
452 | .lock_mask = CM_LOCK_FLOCKC, | |
453 | ||
454 | .ana = &bcm2835_ana_default, | |
455 | ||
456 | .min_rate = 600000000u, | |
457 | .max_rate = 3000000000u, | |
458 | .max_fb_rate = BCM2835_MAX_FB_RATE, | |
459 | }; | |
460 | ||
461 | /* | |
462 | * PLLD is the display PLL, used to drive DSI display panels. | |
463 | * | |
464 | * It is in the PX LDO power domain, which is on when the AUDIO domain | |
465 | * is on. | |
466 | */ | |
467 | static const struct bcm2835_pll_data bcm2835_plld_data = { | |
468 | .name = "plld", | |
469 | .cm_ctrl_reg = CM_PLLD, | |
470 | .a2w_ctrl_reg = A2W_PLLD_CTRL, | |
471 | .frac_reg = A2W_PLLD_FRAC, | |
472 | .ana_reg_base = A2W_PLLD_ANA0, | |
473 | .reference_enable_mask = A2W_XOSC_CTRL_DDR_ENABLE, | |
474 | .lock_mask = CM_LOCK_FLOCKD, | |
475 | ||
476 | .ana = &bcm2835_ana_default, | |
477 | ||
478 | .min_rate = 600000000u, | |
479 | .max_rate = 2400000000u, | |
480 | .max_fb_rate = BCM2835_MAX_FB_RATE, | |
481 | }; | |
482 | ||
483 | /* | |
484 | * PLLH is used to supply the pixel clock or the AUX clock for the TV | |
485 | * encoder. | |
486 | * | |
487 | * It is in the HDMI power domain. | |
488 | */ | |
489 | static const struct bcm2835_pll_data bcm2835_pllh_data = { | |
490 | "pllh", | |
491 | .cm_ctrl_reg = CM_PLLH, | |
492 | .a2w_ctrl_reg = A2W_PLLH_CTRL, | |
493 | .frac_reg = A2W_PLLH_FRAC, | |
494 | .ana_reg_base = A2W_PLLH_ANA0, | |
495 | .reference_enable_mask = A2W_XOSC_CTRL_PLLC_ENABLE, | |
496 | .lock_mask = CM_LOCK_FLOCKH, | |
497 | ||
498 | .ana = &bcm2835_ana_pllh, | |
499 | ||
500 | .min_rate = 600000000u, | |
501 | .max_rate = 3000000000u, | |
502 | .max_fb_rate = BCM2835_MAX_FB_RATE, | |
503 | }; | |
504 | ||
505 | struct bcm2835_pll_divider_data { | |
506 | const char *name; | |
507 | const struct bcm2835_pll_data *source_pll; | |
508 | u32 cm_reg; | |
509 | u32 a2w_reg; | |
510 | ||
511 | u32 load_mask; | |
512 | u32 hold_mask; | |
513 | u32 fixed_divider; | |
514 | }; | |
515 | ||
516 | static const struct bcm2835_pll_divider_data bcm2835_plla_core_data = { | |
517 | .name = "plla_core", | |
518 | .source_pll = &bcm2835_plla_data, | |
519 | .cm_reg = CM_PLLA, | |
520 | .a2w_reg = A2W_PLLA_CORE, | |
521 | .load_mask = CM_PLLA_LOADCORE, | |
522 | .hold_mask = CM_PLLA_HOLDCORE, | |
523 | .fixed_divider = 1, | |
524 | }; | |
525 | ||
526 | static const struct bcm2835_pll_divider_data bcm2835_plla_per_data = { | |
527 | .name = "plla_per", | |
528 | .source_pll = &bcm2835_plla_data, | |
529 | .cm_reg = CM_PLLA, | |
530 | .a2w_reg = A2W_PLLA_PER, | |
531 | .load_mask = CM_PLLA_LOADPER, | |
532 | .hold_mask = CM_PLLA_HOLDPER, | |
533 | .fixed_divider = 1, | |
534 | }; | |
535 | ||
536 | static const struct bcm2835_pll_divider_data bcm2835_pllb_arm_data = { | |
537 | .name = "pllb_arm", | |
538 | .source_pll = &bcm2835_pllb_data, | |
539 | .cm_reg = CM_PLLB, | |
540 | .a2w_reg = A2W_PLLB_ARM, | |
541 | .load_mask = CM_PLLB_LOADARM, | |
542 | .hold_mask = CM_PLLB_HOLDARM, | |
543 | .fixed_divider = 1, | |
544 | }; | |
545 | ||
546 | static const struct bcm2835_pll_divider_data bcm2835_pllc_core0_data = { | |
547 | .name = "pllc_core0", | |
548 | .source_pll = &bcm2835_pllc_data, | |
549 | .cm_reg = CM_PLLC, | |
550 | .a2w_reg = A2W_PLLC_CORE0, | |
551 | .load_mask = CM_PLLC_LOADCORE0, | |
552 | .hold_mask = CM_PLLC_HOLDCORE0, | |
553 | .fixed_divider = 1, | |
554 | }; | |
555 | ||
556 | static const struct bcm2835_pll_divider_data bcm2835_pllc_core1_data = { | |
557 | .name = "pllc_core1", .source_pll = &bcm2835_pllc_data, | |
558 | .cm_reg = CM_PLLC, A2W_PLLC_CORE1, | |
559 | .load_mask = CM_PLLC_LOADCORE1, | |
560 | .hold_mask = CM_PLLC_HOLDCORE1, | |
561 | .fixed_divider = 1, | |
562 | }; | |
563 | ||
564 | static const struct bcm2835_pll_divider_data bcm2835_pllc_core2_data = { | |
565 | .name = "pllc_core2", | |
566 | .source_pll = &bcm2835_pllc_data, | |
567 | .cm_reg = CM_PLLC, | |
568 | .a2w_reg = A2W_PLLC_CORE2, | |
569 | .load_mask = CM_PLLC_LOADCORE2, | |
570 | .hold_mask = CM_PLLC_HOLDCORE2, | |
571 | .fixed_divider = 1, | |
572 | }; | |
573 | ||
574 | static const struct bcm2835_pll_divider_data bcm2835_pllc_per_data = { | |
575 | .name = "pllc_per", | |
576 | .source_pll = &bcm2835_pllc_data, | |
577 | .cm_reg = CM_PLLC, | |
578 | .a2w_reg = A2W_PLLC_PER, | |
579 | .load_mask = CM_PLLC_LOADPER, | |
580 | .hold_mask = CM_PLLC_HOLDPER, | |
581 | .fixed_divider = 1, | |
582 | }; | |
583 | ||
584 | static const struct bcm2835_pll_divider_data bcm2835_plld_core_data = { | |
585 | .name = "plld_core", | |
586 | .source_pll = &bcm2835_plld_data, | |
587 | .cm_reg = CM_PLLD, | |
588 | .a2w_reg = A2W_PLLD_CORE, | |
589 | .load_mask = CM_PLLD_LOADCORE, | |
590 | .hold_mask = CM_PLLD_HOLDCORE, | |
591 | .fixed_divider = 1, | |
592 | }; | |
593 | ||
594 | static const struct bcm2835_pll_divider_data bcm2835_plld_per_data = { | |
595 | .name = "plld_per", | |
596 | .source_pll = &bcm2835_plld_data, | |
597 | .cm_reg = CM_PLLD, | |
598 | .a2w_reg = A2W_PLLD_PER, | |
599 | .load_mask = CM_PLLD_LOADPER, | |
600 | .hold_mask = CM_PLLD_HOLDPER, | |
601 | .fixed_divider = 1, | |
602 | }; | |
603 | ||
604 | static const struct bcm2835_pll_divider_data bcm2835_pllh_rcal_data = { | |
605 | .name = "pllh_rcal", | |
606 | .source_pll = &bcm2835_pllh_data, | |
607 | .cm_reg = CM_PLLH, | |
608 | .a2w_reg = A2W_PLLH_RCAL, | |
609 | .load_mask = CM_PLLH_LOADRCAL, | |
610 | .hold_mask = 0, | |
611 | .fixed_divider = 10, | |
612 | }; | |
613 | ||
614 | static const struct bcm2835_pll_divider_data bcm2835_pllh_aux_data = { | |
615 | .name = "pllh_aux", | |
616 | .source_pll = &bcm2835_pllh_data, | |
617 | .cm_reg = CM_PLLH, | |
618 | .a2w_reg = A2W_PLLH_AUX, | |
619 | .load_mask = CM_PLLH_LOADAUX, | |
620 | .hold_mask = 0, | |
621 | .fixed_divider = 10, | |
622 | }; | |
623 | ||
624 | static const struct bcm2835_pll_divider_data bcm2835_pllh_pix_data = { | |
625 | .name = "pllh_pix", | |
626 | .source_pll = &bcm2835_pllh_data, | |
627 | .cm_reg = CM_PLLH, | |
628 | .a2w_reg = A2W_PLLH_PIX, | |
629 | .load_mask = CM_PLLH_LOADPIX, | |
630 | .hold_mask = 0, | |
631 | .fixed_divider = 10, | |
632 | }; | |
633 | ||
634 | struct bcm2835_clock_data { | |
635 | const char *name; | |
636 | ||
637 | const char *const *parents; | |
638 | int num_mux_parents; | |
639 | ||
640 | u32 ctl_reg; | |
641 | u32 div_reg; | |
642 | ||
643 | /* Number of integer bits in the divider */ | |
644 | u32 int_bits; | |
645 | /* Number of fractional bits in the divider */ | |
646 | u32 frac_bits; | |
647 | ||
648 | bool is_vpu_clock; | |
959ca92a | 649 | bool is_mash_clock; |
41691b88 EA |
650 | }; |
651 | ||
652 | static const char *const bcm2835_clock_per_parents[] = { | |
653 | "gnd", | |
654 | "xosc", | |
655 | "testdebug0", | |
656 | "testdebug1", | |
657 | "plla_per", | |
658 | "pllc_per", | |
659 | "plld_per", | |
660 | "pllh_aux", | |
661 | }; | |
662 | ||
663 | static const char *const bcm2835_clock_vpu_parents[] = { | |
664 | "gnd", | |
665 | "xosc", | |
666 | "testdebug0", | |
667 | "testdebug1", | |
668 | "plla_core", | |
669 | "pllc_core0", | |
670 | "plld_core", | |
671 | "pllh_aux", | |
672 | "pllc_core1", | |
673 | "pllc_core2", | |
674 | }; | |
675 | ||
676 | static const char *const bcm2835_clock_osc_parents[] = { | |
677 | "gnd", | |
678 | "xosc", | |
679 | "testdebug0", | |
680 | "testdebug1" | |
681 | }; | |
682 | ||
683 | /* | |
684 | * Used for a 1Mhz clock for the system clocksource, and also used by | |
685 | * the watchdog timer and the camera pulse generator. | |
686 | */ | |
687 | static const struct bcm2835_clock_data bcm2835_clock_timer_data = { | |
688 | .name = "timer", | |
689 | .num_mux_parents = ARRAY_SIZE(bcm2835_clock_osc_parents), | |
690 | .parents = bcm2835_clock_osc_parents, | |
691 | .ctl_reg = CM_TIMERCTL, | |
692 | .div_reg = CM_TIMERDIV, | |
693 | .int_bits = 6, | |
694 | .frac_bits = 12, | |
695 | }; | |
696 | ||
697 | /* One Time Programmable Memory clock. Maximum 10Mhz. */ | |
698 | static const struct bcm2835_clock_data bcm2835_clock_otp_data = { | |
699 | .name = "otp", | |
700 | .num_mux_parents = ARRAY_SIZE(bcm2835_clock_osc_parents), | |
701 | .parents = bcm2835_clock_osc_parents, | |
702 | .ctl_reg = CM_OTPCTL, | |
703 | .div_reg = CM_OTPDIV, | |
704 | .int_bits = 4, | |
705 | .frac_bits = 0, | |
706 | }; | |
707 | ||
708 | /* | |
709 | * VPU clock. This doesn't have an enable bit, since it drives the | |
710 | * bus for everything else, and is special so it doesn't need to be | |
711 | * gated for rate changes. It is also known as "clk_audio" in various | |
712 | * hardware documentation. | |
713 | */ | |
714 | static const struct bcm2835_clock_data bcm2835_clock_vpu_data = { | |
715 | .name = "vpu", | |
716 | .num_mux_parents = ARRAY_SIZE(bcm2835_clock_vpu_parents), | |
717 | .parents = bcm2835_clock_vpu_parents, | |
718 | .ctl_reg = CM_VPUCTL, | |
719 | .div_reg = CM_VPUDIV, | |
720 | .int_bits = 12, | |
721 | .frac_bits = 8, | |
722 | .is_vpu_clock = true, | |
723 | }; | |
724 | ||
725 | static const struct bcm2835_clock_data bcm2835_clock_v3d_data = { | |
726 | .name = "v3d", | |
727 | .num_mux_parents = ARRAY_SIZE(bcm2835_clock_vpu_parents), | |
728 | .parents = bcm2835_clock_vpu_parents, | |
729 | .ctl_reg = CM_V3DCTL, | |
730 | .div_reg = CM_V3DDIV, | |
731 | .int_bits = 4, | |
732 | .frac_bits = 8, | |
733 | }; | |
734 | ||
735 | static const struct bcm2835_clock_data bcm2835_clock_isp_data = { | |
736 | .name = "isp", | |
737 | .num_mux_parents = ARRAY_SIZE(bcm2835_clock_vpu_parents), | |
738 | .parents = bcm2835_clock_vpu_parents, | |
739 | .ctl_reg = CM_ISPCTL, | |
740 | .div_reg = CM_ISPDIV, | |
741 | .int_bits = 4, | |
742 | .frac_bits = 8, | |
743 | }; | |
744 | ||
745 | static const struct bcm2835_clock_data bcm2835_clock_h264_data = { | |
746 | .name = "h264", | |
747 | .num_mux_parents = ARRAY_SIZE(bcm2835_clock_vpu_parents), | |
748 | .parents = bcm2835_clock_vpu_parents, | |
749 | .ctl_reg = CM_H264CTL, | |
750 | .div_reg = CM_H264DIV, | |
751 | .int_bits = 4, | |
752 | .frac_bits = 8, | |
753 | }; | |
754 | ||
755 | /* TV encoder clock. Only operating frequency is 108Mhz. */ | |
756 | static const struct bcm2835_clock_data bcm2835_clock_vec_data = { | |
757 | .name = "vec", | |
758 | .num_mux_parents = ARRAY_SIZE(bcm2835_clock_per_parents), | |
759 | .parents = bcm2835_clock_per_parents, | |
760 | .ctl_reg = CM_VECCTL, | |
761 | .div_reg = CM_VECDIV, | |
762 | .int_bits = 4, | |
763 | .frac_bits = 0, | |
764 | }; | |
765 | ||
766 | static const struct bcm2835_clock_data bcm2835_clock_uart_data = { | |
767 | .name = "uart", | |
768 | .num_mux_parents = ARRAY_SIZE(bcm2835_clock_per_parents), | |
769 | .parents = bcm2835_clock_per_parents, | |
770 | .ctl_reg = CM_UARTCTL, | |
771 | .div_reg = CM_UARTDIV, | |
772 | .int_bits = 10, | |
773 | .frac_bits = 12, | |
774 | }; | |
775 | ||
776 | /* HDMI state machine */ | |
777 | static const struct bcm2835_clock_data bcm2835_clock_hsm_data = { | |
778 | .name = "hsm", | |
779 | .num_mux_parents = ARRAY_SIZE(bcm2835_clock_per_parents), | |
780 | .parents = bcm2835_clock_per_parents, | |
781 | .ctl_reg = CM_HSMCTL, | |
782 | .div_reg = CM_HSMDIV, | |
783 | .int_bits = 4, | |
784 | .frac_bits = 8, | |
785 | }; | |
786 | ||
787 | /* | |
788 | * Secondary SDRAM clock. Used for low-voltage modes when the PLL in | |
789 | * the SDRAM controller can't be used. | |
790 | */ | |
791 | static const struct bcm2835_clock_data bcm2835_clock_sdram_data = { | |
792 | .name = "sdram", | |
793 | .num_mux_parents = ARRAY_SIZE(bcm2835_clock_vpu_parents), | |
794 | .parents = bcm2835_clock_vpu_parents, | |
795 | .ctl_reg = CM_SDCCTL, | |
796 | .div_reg = CM_SDCDIV, | |
797 | .int_bits = 6, | |
798 | .frac_bits = 0, | |
799 | }; | |
800 | ||
801 | /* Clock for the temperature sensor. Generally run at 2Mhz, max 5Mhz. */ | |
802 | static const struct bcm2835_clock_data bcm2835_clock_tsens_data = { | |
803 | .name = "tsens", | |
804 | .num_mux_parents = ARRAY_SIZE(bcm2835_clock_osc_parents), | |
805 | .parents = bcm2835_clock_osc_parents, | |
806 | .ctl_reg = CM_TSENSCTL, | |
807 | .div_reg = CM_TSENSDIV, | |
808 | .int_bits = 5, | |
809 | .frac_bits = 0, | |
810 | }; | |
811 | ||
812 | /* Arasan EMMC clock */ | |
813 | static const struct bcm2835_clock_data bcm2835_clock_emmc_data = { | |
814 | .name = "emmc", | |
815 | .num_mux_parents = ARRAY_SIZE(bcm2835_clock_per_parents), | |
816 | .parents = bcm2835_clock_per_parents, | |
817 | .ctl_reg = CM_EMMCCTL, | |
818 | .div_reg = CM_EMMCDIV, | |
819 | .int_bits = 4, | |
820 | .frac_bits = 8, | |
821 | }; | |
822 | ||
cfbab8fb RP |
823 | static const struct bcm2835_clock_data bcm2835_clock_pwm_data = { |
824 | .name = "pwm", | |
825 | .num_mux_parents = ARRAY_SIZE(bcm2835_clock_per_parents), | |
826 | .parents = bcm2835_clock_per_parents, | |
827 | .ctl_reg = CM_PWMCTL, | |
828 | .div_reg = CM_PWMDIV, | |
829 | .int_bits = 12, | |
830 | .frac_bits = 12, | |
959ca92a | 831 | .is_mash_clock = true, |
cfbab8fb RP |
832 | }; |
833 | ||
41691b88 EA |
834 | struct bcm2835_pll { |
835 | struct clk_hw hw; | |
836 | struct bcm2835_cprman *cprman; | |
837 | const struct bcm2835_pll_data *data; | |
838 | }; | |
839 | ||
840 | static int bcm2835_pll_is_on(struct clk_hw *hw) | |
841 | { | |
842 | struct bcm2835_pll *pll = container_of(hw, struct bcm2835_pll, hw); | |
843 | struct bcm2835_cprman *cprman = pll->cprman; | |
844 | const struct bcm2835_pll_data *data = pll->data; | |
845 | ||
846 | return cprman_read(cprman, data->a2w_ctrl_reg) & | |
847 | A2W_PLL_CTRL_PRST_DISABLE; | |
848 | } | |
849 | ||
850 | static void bcm2835_pll_choose_ndiv_and_fdiv(unsigned long rate, | |
851 | unsigned long parent_rate, | |
852 | u32 *ndiv, u32 *fdiv) | |
853 | { | |
854 | u64 div; | |
855 | ||
856 | div = (u64)rate << A2W_PLL_FRAC_BITS; | |
857 | do_div(div, parent_rate); | |
858 | ||
859 | *ndiv = div >> A2W_PLL_FRAC_BITS; | |
860 | *fdiv = div & ((1 << A2W_PLL_FRAC_BITS) - 1); | |
861 | } | |
862 | ||
863 | static long bcm2835_pll_rate_from_divisors(unsigned long parent_rate, | |
864 | u32 ndiv, u32 fdiv, u32 pdiv) | |
865 | { | |
866 | u64 rate; | |
867 | ||
868 | if (pdiv == 0) | |
869 | return 0; | |
870 | ||
871 | rate = (u64)parent_rate * ((ndiv << A2W_PLL_FRAC_BITS) + fdiv); | |
872 | do_div(rate, pdiv); | |
873 | return rate >> A2W_PLL_FRAC_BITS; | |
874 | } | |
875 | ||
876 | static long bcm2835_pll_round_rate(struct clk_hw *hw, unsigned long rate, | |
877 | unsigned long *parent_rate) | |
878 | { | |
879 | u32 ndiv, fdiv; | |
880 | ||
881 | bcm2835_pll_choose_ndiv_and_fdiv(rate, *parent_rate, &ndiv, &fdiv); | |
882 | ||
883 | return bcm2835_pll_rate_from_divisors(*parent_rate, ndiv, fdiv, 1); | |
884 | } | |
885 | ||
886 | static unsigned long bcm2835_pll_get_rate(struct clk_hw *hw, | |
887 | unsigned long parent_rate) | |
888 | { | |
889 | struct bcm2835_pll *pll = container_of(hw, struct bcm2835_pll, hw); | |
890 | struct bcm2835_cprman *cprman = pll->cprman; | |
891 | const struct bcm2835_pll_data *data = pll->data; | |
892 | u32 a2wctrl = cprman_read(cprman, data->a2w_ctrl_reg); | |
893 | u32 ndiv, pdiv, fdiv; | |
894 | bool using_prediv; | |
895 | ||
896 | if (parent_rate == 0) | |
897 | return 0; | |
898 | ||
899 | fdiv = cprman_read(cprman, data->frac_reg) & A2W_PLL_FRAC_MASK; | |
900 | ndiv = (a2wctrl & A2W_PLL_CTRL_NDIV_MASK) >> A2W_PLL_CTRL_NDIV_SHIFT; | |
901 | pdiv = (a2wctrl & A2W_PLL_CTRL_PDIV_MASK) >> A2W_PLL_CTRL_PDIV_SHIFT; | |
902 | using_prediv = cprman_read(cprman, data->ana_reg_base + 4) & | |
903 | data->ana->fb_prediv_mask; | |
904 | ||
905 | if (using_prediv) | |
906 | ndiv *= 2; | |
907 | ||
908 | return bcm2835_pll_rate_from_divisors(parent_rate, ndiv, fdiv, pdiv); | |
909 | } | |
910 | ||
911 | static void bcm2835_pll_off(struct clk_hw *hw) | |
912 | { | |
913 | struct bcm2835_pll *pll = container_of(hw, struct bcm2835_pll, hw); | |
914 | struct bcm2835_cprman *cprman = pll->cprman; | |
915 | const struct bcm2835_pll_data *data = pll->data; | |
916 | ||
6727f086 MS |
917 | spin_lock(&cprman->regs_lock); |
918 | cprman_write(cprman, data->cm_ctrl_reg, | |
919 | cprman_read(cprman, data->cm_ctrl_reg) | | |
920 | CM_PLL_ANARST); | |
921 | cprman_write(cprman, data->a2w_ctrl_reg, | |
922 | cprman_read(cprman, data->a2w_ctrl_reg) | | |
923 | A2W_PLL_CTRL_PWRDN); | |
924 | spin_unlock(&cprman->regs_lock); | |
41691b88 EA |
925 | } |
926 | ||
927 | static int bcm2835_pll_on(struct clk_hw *hw) | |
928 | { | |
929 | struct bcm2835_pll *pll = container_of(hw, struct bcm2835_pll, hw); | |
930 | struct bcm2835_cprman *cprman = pll->cprman; | |
931 | const struct bcm2835_pll_data *data = pll->data; | |
932 | ktime_t timeout; | |
933 | ||
934 | /* Take the PLL out of reset. */ | |
935 | cprman_write(cprman, data->cm_ctrl_reg, | |
936 | cprman_read(cprman, data->cm_ctrl_reg) & ~CM_PLL_ANARST); | |
937 | ||
938 | /* Wait for the PLL to lock. */ | |
939 | timeout = ktime_add_ns(ktime_get(), LOCK_TIMEOUT_NS); | |
940 | while (!(cprman_read(cprman, CM_LOCK) & data->lock_mask)) { | |
941 | if (ktime_after(ktime_get(), timeout)) { | |
942 | dev_err(cprman->dev, "%s: couldn't lock PLL\n", | |
943 | clk_hw_get_name(hw)); | |
944 | return -ETIMEDOUT; | |
945 | } | |
946 | ||
947 | cpu_relax(); | |
948 | } | |
949 | ||
950 | return 0; | |
951 | } | |
952 | ||
953 | static void | |
954 | bcm2835_pll_write_ana(struct bcm2835_cprman *cprman, u32 ana_reg_base, u32 *ana) | |
955 | { | |
956 | int i; | |
957 | ||
958 | /* | |
959 | * ANA register setup is done as a series of writes to | |
960 | * ANA3-ANA0, in that order. This lets us write all 4 | |
961 | * registers as a single cycle of the serdes interface (taking | |
962 | * 100 xosc clocks), whereas if we were to update ana0, 1, and | |
963 | * 3 individually through their partial-write registers, each | |
964 | * would be their own serdes cycle. | |
965 | */ | |
966 | for (i = 3; i >= 0; i--) | |
967 | cprman_write(cprman, ana_reg_base + i * 4, ana[i]); | |
968 | } | |
969 | ||
970 | static int bcm2835_pll_set_rate(struct clk_hw *hw, | |
971 | unsigned long rate, unsigned long parent_rate) | |
972 | { | |
973 | struct bcm2835_pll *pll = container_of(hw, struct bcm2835_pll, hw); | |
974 | struct bcm2835_cprman *cprman = pll->cprman; | |
975 | const struct bcm2835_pll_data *data = pll->data; | |
976 | bool was_using_prediv, use_fb_prediv, do_ana_setup_first; | |
977 | u32 ndiv, fdiv, a2w_ctl; | |
978 | u32 ana[4]; | |
979 | int i; | |
980 | ||
981 | if (rate < data->min_rate || rate > data->max_rate) { | |
982 | dev_err(cprman->dev, "%s: rate out of spec: %lu vs (%lu, %lu)\n", | |
983 | clk_hw_get_name(hw), rate, | |
984 | data->min_rate, data->max_rate); | |
985 | return -EINVAL; | |
986 | } | |
987 | ||
988 | if (rate > data->max_fb_rate) { | |
989 | use_fb_prediv = true; | |
990 | rate /= 2; | |
991 | } else { | |
992 | use_fb_prediv = false; | |
993 | } | |
994 | ||
995 | bcm2835_pll_choose_ndiv_and_fdiv(rate, parent_rate, &ndiv, &fdiv); | |
996 | ||
997 | for (i = 3; i >= 0; i--) | |
998 | ana[i] = cprman_read(cprman, data->ana_reg_base + i * 4); | |
999 | ||
1000 | was_using_prediv = ana[1] & data->ana->fb_prediv_mask; | |
1001 | ||
1002 | ana[0] &= ~data->ana->mask0; | |
1003 | ana[0] |= data->ana->set0; | |
1004 | ana[1] &= ~data->ana->mask1; | |
1005 | ana[1] |= data->ana->set1; | |
1006 | ana[3] &= ~data->ana->mask3; | |
1007 | ana[3] |= data->ana->set3; | |
1008 | ||
1009 | if (was_using_prediv && !use_fb_prediv) { | |
1010 | ana[1] &= ~data->ana->fb_prediv_mask; | |
1011 | do_ana_setup_first = true; | |
1012 | } else if (!was_using_prediv && use_fb_prediv) { | |
1013 | ana[1] |= data->ana->fb_prediv_mask; | |
1014 | do_ana_setup_first = false; | |
1015 | } else { | |
1016 | do_ana_setup_first = true; | |
1017 | } | |
1018 | ||
1019 | /* Unmask the reference clock from the oscillator. */ | |
1020 | cprman_write(cprman, A2W_XOSC_CTRL, | |
1021 | cprman_read(cprman, A2W_XOSC_CTRL) | | |
1022 | data->reference_enable_mask); | |
1023 | ||
1024 | if (do_ana_setup_first) | |
1025 | bcm2835_pll_write_ana(cprman, data->ana_reg_base, ana); | |
1026 | ||
1027 | /* Set the PLL multiplier from the oscillator. */ | |
1028 | cprman_write(cprman, data->frac_reg, fdiv); | |
1029 | ||
1030 | a2w_ctl = cprman_read(cprman, data->a2w_ctrl_reg); | |
1031 | a2w_ctl &= ~A2W_PLL_CTRL_NDIV_MASK; | |
1032 | a2w_ctl |= ndiv << A2W_PLL_CTRL_NDIV_SHIFT; | |
1033 | a2w_ctl &= ~A2W_PLL_CTRL_PDIV_MASK; | |
1034 | a2w_ctl |= 1 << A2W_PLL_CTRL_PDIV_SHIFT; | |
1035 | cprman_write(cprman, data->a2w_ctrl_reg, a2w_ctl); | |
1036 | ||
1037 | if (!do_ana_setup_first) | |
1038 | bcm2835_pll_write_ana(cprman, data->ana_reg_base, ana); | |
1039 | ||
1040 | return 0; | |
1041 | } | |
1042 | ||
1043 | static const struct clk_ops bcm2835_pll_clk_ops = { | |
1044 | .is_prepared = bcm2835_pll_is_on, | |
1045 | .prepare = bcm2835_pll_on, | |
1046 | .unprepare = bcm2835_pll_off, | |
1047 | .recalc_rate = bcm2835_pll_get_rate, | |
1048 | .set_rate = bcm2835_pll_set_rate, | |
1049 | .round_rate = bcm2835_pll_round_rate, | |
1050 | }; | |
1051 | ||
1052 | struct bcm2835_pll_divider { | |
1053 | struct clk_divider div; | |
1054 | struct bcm2835_cprman *cprman; | |
1055 | const struct bcm2835_pll_divider_data *data; | |
1056 | }; | |
1057 | ||
1058 | static struct bcm2835_pll_divider * | |
1059 | bcm2835_pll_divider_from_hw(struct clk_hw *hw) | |
1060 | { | |
1061 | return container_of(hw, struct bcm2835_pll_divider, div.hw); | |
1062 | } | |
1063 | ||
1064 | static int bcm2835_pll_divider_is_on(struct clk_hw *hw) | |
1065 | { | |
1066 | struct bcm2835_pll_divider *divider = bcm2835_pll_divider_from_hw(hw); | |
1067 | struct bcm2835_cprman *cprman = divider->cprman; | |
1068 | const struct bcm2835_pll_divider_data *data = divider->data; | |
1069 | ||
1070 | return !(cprman_read(cprman, data->a2w_reg) & A2W_PLL_CHANNEL_DISABLE); | |
1071 | } | |
1072 | ||
1073 | static long bcm2835_pll_divider_round_rate(struct clk_hw *hw, | |
1074 | unsigned long rate, | |
1075 | unsigned long *parent_rate) | |
1076 | { | |
1077 | return clk_divider_ops.round_rate(hw, rate, parent_rate); | |
1078 | } | |
1079 | ||
1080 | static unsigned long bcm2835_pll_divider_get_rate(struct clk_hw *hw, | |
1081 | unsigned long parent_rate) | |
1082 | { | |
79c1e2fc | 1083 | return clk_divider_ops.recalc_rate(hw, parent_rate); |
41691b88 EA |
1084 | } |
1085 | ||
1086 | static void bcm2835_pll_divider_off(struct clk_hw *hw) | |
1087 | { | |
1088 | struct bcm2835_pll_divider *divider = bcm2835_pll_divider_from_hw(hw); | |
1089 | struct bcm2835_cprman *cprman = divider->cprman; | |
1090 | const struct bcm2835_pll_divider_data *data = divider->data; | |
1091 | ||
ec36a5c6 | 1092 | spin_lock(&cprman->regs_lock); |
41691b88 EA |
1093 | cprman_write(cprman, data->cm_reg, |
1094 | (cprman_read(cprman, data->cm_reg) & | |
1095 | ~data->load_mask) | data->hold_mask); | |
1096 | cprman_write(cprman, data->a2w_reg, A2W_PLL_CHANNEL_DISABLE); | |
ec36a5c6 | 1097 | spin_unlock(&cprman->regs_lock); |
41691b88 EA |
1098 | } |
1099 | ||
1100 | static int bcm2835_pll_divider_on(struct clk_hw *hw) | |
1101 | { | |
1102 | struct bcm2835_pll_divider *divider = bcm2835_pll_divider_from_hw(hw); | |
1103 | struct bcm2835_cprman *cprman = divider->cprman; | |
1104 | const struct bcm2835_pll_divider_data *data = divider->data; | |
1105 | ||
ec36a5c6 | 1106 | spin_lock(&cprman->regs_lock); |
41691b88 EA |
1107 | cprman_write(cprman, data->a2w_reg, |
1108 | cprman_read(cprman, data->a2w_reg) & | |
1109 | ~A2W_PLL_CHANNEL_DISABLE); | |
1110 | ||
1111 | cprman_write(cprman, data->cm_reg, | |
1112 | cprman_read(cprman, data->cm_reg) & ~data->hold_mask); | |
ec36a5c6 | 1113 | spin_unlock(&cprman->regs_lock); |
41691b88 EA |
1114 | |
1115 | return 0; | |
1116 | } | |
1117 | ||
1118 | static int bcm2835_pll_divider_set_rate(struct clk_hw *hw, | |
1119 | unsigned long rate, | |
1120 | unsigned long parent_rate) | |
1121 | { | |
1122 | struct bcm2835_pll_divider *divider = bcm2835_pll_divider_from_hw(hw); | |
1123 | struct bcm2835_cprman *cprman = divider->cprman; | |
1124 | const struct bcm2835_pll_divider_data *data = divider->data; | |
773b3966 | 1125 | u32 cm, div, max_div = 1 << A2W_PLL_DIV_BITS; |
41691b88 | 1126 | |
773b3966 EA |
1127 | div = DIV_ROUND_UP_ULL(parent_rate, rate); |
1128 | ||
1129 | div = min(div, max_div); | |
1130 | if (div == max_div) | |
1131 | div = 0; | |
41691b88 | 1132 | |
773b3966 | 1133 | cprman_write(cprman, data->a2w_reg, div); |
41691b88 EA |
1134 | cm = cprman_read(cprman, data->cm_reg); |
1135 | cprman_write(cprman, data->cm_reg, cm | data->load_mask); | |
1136 | cprman_write(cprman, data->cm_reg, cm & ~data->load_mask); | |
1137 | ||
1138 | return 0; | |
1139 | } | |
1140 | ||
1141 | static const struct clk_ops bcm2835_pll_divider_clk_ops = { | |
1142 | .is_prepared = bcm2835_pll_divider_is_on, | |
1143 | .prepare = bcm2835_pll_divider_on, | |
1144 | .unprepare = bcm2835_pll_divider_off, | |
1145 | .recalc_rate = bcm2835_pll_divider_get_rate, | |
1146 | .set_rate = bcm2835_pll_divider_set_rate, | |
1147 | .round_rate = bcm2835_pll_divider_round_rate, | |
1148 | }; | |
1149 | ||
1150 | /* | |
1151 | * The CM dividers do fixed-point division, so we can't use the | |
1152 | * generic integer divider code like the PLL dividers do (and we can't | |
1153 | * fake it by having some fixed shifts preceding it in the clock tree, | |
1154 | * because we'd run out of bits in a 32-bit unsigned long). | |
1155 | */ | |
1156 | struct bcm2835_clock { | |
1157 | struct clk_hw hw; | |
1158 | struct bcm2835_cprman *cprman; | |
1159 | const struct bcm2835_clock_data *data; | |
1160 | }; | |
1161 | ||
1162 | static struct bcm2835_clock *bcm2835_clock_from_hw(struct clk_hw *hw) | |
1163 | { | |
1164 | return container_of(hw, struct bcm2835_clock, hw); | |
1165 | } | |
1166 | ||
1167 | static int bcm2835_clock_is_on(struct clk_hw *hw) | |
1168 | { | |
1169 | struct bcm2835_clock *clock = bcm2835_clock_from_hw(hw); | |
1170 | struct bcm2835_cprman *cprman = clock->cprman; | |
1171 | const struct bcm2835_clock_data *data = clock->data; | |
1172 | ||
1173 | return (cprman_read(cprman, data->ctl_reg) & CM_ENABLE) != 0; | |
1174 | } | |
1175 | ||
1176 | static u32 bcm2835_clock_choose_div(struct clk_hw *hw, | |
1177 | unsigned long rate, | |
9c95b32c RP |
1178 | unsigned long parent_rate, |
1179 | bool round_up) | |
41691b88 EA |
1180 | { |
1181 | struct bcm2835_clock *clock = bcm2835_clock_from_hw(hw); | |
1182 | const struct bcm2835_clock_data *data = clock->data; | |
9c95b32c RP |
1183 | u32 unused_frac_mask = |
1184 | GENMASK(CM_DIV_FRAC_BITS - data->frac_bits, 0) >> 1; | |
41691b88 | 1185 | u64 temp = (u64)parent_rate << CM_DIV_FRAC_BITS; |
9c95b32c | 1186 | u64 rem; |
959ca92a | 1187 | u32 div, mindiv, maxdiv; |
41691b88 | 1188 | |
9c95b32c | 1189 | rem = do_div(temp, rate); |
41691b88 EA |
1190 | div = temp; |
1191 | ||
9c95b32c RP |
1192 | /* Round up and mask off the unused bits */ |
1193 | if (round_up && ((div & unused_frac_mask) != 0 || rem != 0)) | |
1194 | div += unused_frac_mask + 1; | |
1195 | div &= ~unused_frac_mask; | |
41691b88 | 1196 | |
959ca92a MS |
1197 | /* different clamping limits apply for a mash clock */ |
1198 | if (data->is_mash_clock) { | |
1199 | /* clamp to min divider of 2 */ | |
1200 | mindiv = 2 << CM_DIV_FRAC_BITS; | |
1201 | /* clamp to the highest possible integer divider */ | |
1202 | maxdiv = (BIT(data->int_bits) - 1) << CM_DIV_FRAC_BITS; | |
1203 | } else { | |
1204 | /* clamp to min divider of 1 */ | |
1205 | mindiv = 1 << CM_DIV_FRAC_BITS; | |
1206 | /* clamp to the highest possible fractional divider */ | |
1207 | maxdiv = GENMASK(data->int_bits + CM_DIV_FRAC_BITS - 1, | |
1208 | CM_DIV_FRAC_BITS - data->frac_bits); | |
1209 | } | |
1210 | ||
1211 | /* apply the clamping limits */ | |
1212 | div = max_t(u32, div, mindiv); | |
1213 | div = min_t(u32, div, maxdiv); | |
41691b88 EA |
1214 | |
1215 | return div; | |
1216 | } | |
1217 | ||
1218 | static long bcm2835_clock_rate_from_divisor(struct bcm2835_clock *clock, | |
1219 | unsigned long parent_rate, | |
1220 | u32 div) | |
1221 | { | |
1222 | const struct bcm2835_clock_data *data = clock->data; | |
1223 | u64 temp; | |
1224 | ||
1225 | /* | |
1226 | * The divisor is a 12.12 fixed point field, but only some of | |
1227 | * the bits are populated in any given clock. | |
1228 | */ | |
1229 | div >>= CM_DIV_FRAC_BITS - data->frac_bits; | |
1230 | div &= (1 << (data->int_bits + data->frac_bits)) - 1; | |
1231 | ||
1232 | if (div == 0) | |
1233 | return 0; | |
1234 | ||
1235 | temp = (u64)parent_rate << data->frac_bits; | |
1236 | ||
1237 | do_div(temp, div); | |
1238 | ||
1239 | return temp; | |
1240 | } | |
1241 | ||
41691b88 EA |
1242 | static unsigned long bcm2835_clock_get_rate(struct clk_hw *hw, |
1243 | unsigned long parent_rate) | |
1244 | { | |
1245 | struct bcm2835_clock *clock = bcm2835_clock_from_hw(hw); | |
1246 | struct bcm2835_cprman *cprman = clock->cprman; | |
1247 | const struct bcm2835_clock_data *data = clock->data; | |
1248 | u32 div = cprman_read(cprman, data->div_reg); | |
1249 | ||
1250 | return bcm2835_clock_rate_from_divisor(clock, parent_rate, div); | |
1251 | } | |
1252 | ||
1253 | static void bcm2835_clock_wait_busy(struct bcm2835_clock *clock) | |
1254 | { | |
1255 | struct bcm2835_cprman *cprman = clock->cprman; | |
1256 | const struct bcm2835_clock_data *data = clock->data; | |
1257 | ktime_t timeout = ktime_add_ns(ktime_get(), LOCK_TIMEOUT_NS); | |
1258 | ||
1259 | while (cprman_read(cprman, data->ctl_reg) & CM_BUSY) { | |
1260 | if (ktime_after(ktime_get(), timeout)) { | |
1261 | dev_err(cprman->dev, "%s: couldn't lock PLL\n", | |
1262 | clk_hw_get_name(&clock->hw)); | |
1263 | return; | |
1264 | } | |
1265 | cpu_relax(); | |
1266 | } | |
1267 | } | |
1268 | ||
1269 | static void bcm2835_clock_off(struct clk_hw *hw) | |
1270 | { | |
1271 | struct bcm2835_clock *clock = bcm2835_clock_from_hw(hw); | |
1272 | struct bcm2835_cprman *cprman = clock->cprman; | |
1273 | const struct bcm2835_clock_data *data = clock->data; | |
1274 | ||
1275 | spin_lock(&cprman->regs_lock); | |
1276 | cprman_write(cprman, data->ctl_reg, | |
1277 | cprman_read(cprman, data->ctl_reg) & ~CM_ENABLE); | |
1278 | spin_unlock(&cprman->regs_lock); | |
1279 | ||
1280 | /* BUSY will remain high until the divider completes its cycle. */ | |
1281 | bcm2835_clock_wait_busy(clock); | |
1282 | } | |
1283 | ||
1284 | static int bcm2835_clock_on(struct clk_hw *hw) | |
1285 | { | |
1286 | struct bcm2835_clock *clock = bcm2835_clock_from_hw(hw); | |
1287 | struct bcm2835_cprman *cprman = clock->cprman; | |
1288 | const struct bcm2835_clock_data *data = clock->data; | |
1289 | ||
1290 | spin_lock(&cprman->regs_lock); | |
1291 | cprman_write(cprman, data->ctl_reg, | |
1292 | cprman_read(cprman, data->ctl_reg) | | |
1293 | CM_ENABLE | | |
1294 | CM_GATE); | |
1295 | spin_unlock(&cprman->regs_lock); | |
1296 | ||
1297 | return 0; | |
1298 | } | |
1299 | ||
1300 | static int bcm2835_clock_set_rate(struct clk_hw *hw, | |
1301 | unsigned long rate, unsigned long parent_rate) | |
1302 | { | |
1303 | struct bcm2835_clock *clock = bcm2835_clock_from_hw(hw); | |
1304 | struct bcm2835_cprman *cprman = clock->cprman; | |
1305 | const struct bcm2835_clock_data *data = clock->data; | |
9c95b32c | 1306 | u32 div = bcm2835_clock_choose_div(hw, rate, parent_rate, false); |
959ca92a MS |
1307 | u32 ctl; |
1308 | ||
1309 | spin_lock(&cprman->regs_lock); | |
1310 | ||
1311 | /* | |
1312 | * Setting up frac support | |
1313 | * | |
1314 | * In principle it is recommended to stop/start the clock first, | |
1315 | * but as we set CLK_SET_RATE_GATE during registration of the | |
1316 | * clock this requirement should be take care of by the | |
1317 | * clk-framework. | |
1318 | */ | |
1319 | ctl = cprman_read(cprman, data->ctl_reg) & ~CM_FRAC; | |
1320 | ctl |= (div & CM_DIV_FRAC_MASK) ? CM_FRAC : 0; | |
1321 | cprman_write(cprman, data->ctl_reg, ctl); | |
41691b88 EA |
1322 | |
1323 | cprman_write(cprman, data->div_reg, div); | |
1324 | ||
959ca92a MS |
1325 | spin_unlock(&cprman->regs_lock); |
1326 | ||
41691b88 EA |
1327 | return 0; |
1328 | } | |
1329 | ||
6d18b8ad RP |
1330 | static int bcm2835_clock_determine_rate(struct clk_hw *hw, |
1331 | struct clk_rate_request *req) | |
1332 | { | |
1333 | struct bcm2835_clock *clock = bcm2835_clock_from_hw(hw); | |
1334 | struct clk_hw *parent, *best_parent = NULL; | |
1335 | unsigned long rate, best_rate = 0; | |
1336 | unsigned long prate, best_prate = 0; | |
1337 | size_t i; | |
1338 | u32 div; | |
1339 | ||
1340 | /* | |
1341 | * Select parent clock that results in the closest but lower rate | |
1342 | */ | |
1343 | for (i = 0; i < clk_hw_get_num_parents(hw); ++i) { | |
1344 | parent = clk_hw_get_parent_by_index(hw, i); | |
1345 | if (!parent) | |
1346 | continue; | |
1347 | prate = clk_hw_get_rate(parent); | |
1348 | div = bcm2835_clock_choose_div(hw, req->rate, prate, true); | |
1349 | rate = bcm2835_clock_rate_from_divisor(clock, prate, div); | |
1350 | if (rate > best_rate && rate <= req->rate) { | |
1351 | best_parent = parent; | |
1352 | best_prate = prate; | |
1353 | best_rate = rate; | |
1354 | } | |
1355 | } | |
1356 | ||
1357 | if (!best_parent) | |
1358 | return -EINVAL; | |
1359 | ||
1360 | req->best_parent_hw = best_parent; | |
1361 | req->best_parent_rate = best_prate; | |
1362 | ||
1363 | req->rate = best_rate; | |
1364 | ||
1365 | return 0; | |
1366 | } | |
1367 | ||
1368 | static int bcm2835_clock_set_parent(struct clk_hw *hw, u8 index) | |
1369 | { | |
1370 | struct bcm2835_clock *clock = bcm2835_clock_from_hw(hw); | |
1371 | struct bcm2835_cprman *cprman = clock->cprman; | |
1372 | const struct bcm2835_clock_data *data = clock->data; | |
1373 | u8 src = (index << CM_SRC_SHIFT) & CM_SRC_MASK; | |
1374 | ||
1375 | cprman_write(cprman, data->ctl_reg, src); | |
1376 | return 0; | |
1377 | } | |
1378 | ||
1379 | static u8 bcm2835_clock_get_parent(struct clk_hw *hw) | |
1380 | { | |
1381 | struct bcm2835_clock *clock = bcm2835_clock_from_hw(hw); | |
1382 | struct bcm2835_cprman *cprman = clock->cprman; | |
1383 | const struct bcm2835_clock_data *data = clock->data; | |
1384 | u32 src = cprman_read(cprman, data->ctl_reg); | |
1385 | ||
1386 | return (src & CM_SRC_MASK) >> CM_SRC_SHIFT; | |
1387 | } | |
1388 | ||
1389 | ||
41691b88 EA |
1390 | static const struct clk_ops bcm2835_clock_clk_ops = { |
1391 | .is_prepared = bcm2835_clock_is_on, | |
1392 | .prepare = bcm2835_clock_on, | |
1393 | .unprepare = bcm2835_clock_off, | |
1394 | .recalc_rate = bcm2835_clock_get_rate, | |
1395 | .set_rate = bcm2835_clock_set_rate, | |
6d18b8ad RP |
1396 | .determine_rate = bcm2835_clock_determine_rate, |
1397 | .set_parent = bcm2835_clock_set_parent, | |
1398 | .get_parent = bcm2835_clock_get_parent, | |
41691b88 EA |
1399 | }; |
1400 | ||
1401 | static int bcm2835_vpu_clock_is_on(struct clk_hw *hw) | |
1402 | { | |
1403 | return true; | |
1404 | } | |
1405 | ||
1406 | /* | |
1407 | * The VPU clock can never be disabled (it doesn't have an ENABLE | |
1408 | * bit), so it gets its own set of clock ops. | |
1409 | */ | |
1410 | static const struct clk_ops bcm2835_vpu_clock_clk_ops = { | |
1411 | .is_prepared = bcm2835_vpu_clock_is_on, | |
1412 | .recalc_rate = bcm2835_clock_get_rate, | |
1413 | .set_rate = bcm2835_clock_set_rate, | |
6d18b8ad RP |
1414 | .determine_rate = bcm2835_clock_determine_rate, |
1415 | .set_parent = bcm2835_clock_set_parent, | |
1416 | .get_parent = bcm2835_clock_get_parent, | |
41691b88 EA |
1417 | }; |
1418 | ||
1419 | static struct clk *bcm2835_register_pll(struct bcm2835_cprman *cprman, | |
1420 | const struct bcm2835_pll_data *data) | |
1421 | { | |
1422 | struct bcm2835_pll *pll; | |
1423 | struct clk_init_data init; | |
1424 | ||
1425 | memset(&init, 0, sizeof(init)); | |
1426 | ||
1427 | /* All of the PLLs derive from the external oscillator. */ | |
1428 | init.parent_names = &cprman->osc_name; | |
1429 | init.num_parents = 1; | |
1430 | init.name = data->name; | |
1431 | init.ops = &bcm2835_pll_clk_ops; | |
1432 | init.flags = CLK_IGNORE_UNUSED; | |
1433 | ||
1434 | pll = kzalloc(sizeof(*pll), GFP_KERNEL); | |
1435 | if (!pll) | |
1436 | return NULL; | |
1437 | ||
1438 | pll->cprman = cprman; | |
1439 | pll->data = data; | |
1440 | pll->hw.init = &init; | |
1441 | ||
1442 | return devm_clk_register(cprman->dev, &pll->hw); | |
1443 | } | |
1444 | ||
1445 | static struct clk * | |
1446 | bcm2835_register_pll_divider(struct bcm2835_cprman *cprman, | |
1447 | const struct bcm2835_pll_divider_data *data) | |
1448 | { | |
1449 | struct bcm2835_pll_divider *divider; | |
1450 | struct clk_init_data init; | |
1451 | struct clk *clk; | |
1452 | const char *divider_name; | |
1453 | ||
1454 | if (data->fixed_divider != 1) { | |
1455 | divider_name = devm_kasprintf(cprman->dev, GFP_KERNEL, | |
1456 | "%s_prediv", data->name); | |
1457 | if (!divider_name) | |
1458 | return NULL; | |
1459 | } else { | |
1460 | divider_name = data->name; | |
1461 | } | |
1462 | ||
1463 | memset(&init, 0, sizeof(init)); | |
1464 | ||
1465 | init.parent_names = &data->source_pll->name; | |
1466 | init.num_parents = 1; | |
1467 | init.name = divider_name; | |
1468 | init.ops = &bcm2835_pll_divider_clk_ops; | |
1469 | init.flags = CLK_SET_RATE_PARENT | CLK_IGNORE_UNUSED; | |
1470 | ||
1471 | divider = devm_kzalloc(cprman->dev, sizeof(*divider), GFP_KERNEL); | |
1472 | if (!divider) | |
1473 | return NULL; | |
1474 | ||
1475 | divider->div.reg = cprman->regs + data->a2w_reg; | |
1476 | divider->div.shift = A2W_PLL_DIV_SHIFT; | |
1477 | divider->div.width = A2W_PLL_DIV_BITS; | |
79c1e2fc | 1478 | divider->div.flags = CLK_DIVIDER_MAX_AT_ZERO; |
41691b88 EA |
1479 | divider->div.lock = &cprman->regs_lock; |
1480 | divider->div.hw.init = &init; | |
1481 | divider->div.table = NULL; | |
1482 | ||
1483 | divider->cprman = cprman; | |
1484 | divider->data = data; | |
1485 | ||
1486 | clk = devm_clk_register(cprman->dev, ÷r->div.hw); | |
1487 | if (IS_ERR(clk)) | |
1488 | return clk; | |
1489 | ||
1490 | /* | |
1491 | * PLLH's channels have a fixed divide by 10 afterwards, which | |
1492 | * is what our consumers are actually using. | |
1493 | */ | |
1494 | if (data->fixed_divider != 1) { | |
1495 | return clk_register_fixed_factor(cprman->dev, data->name, | |
1496 | divider_name, | |
1497 | CLK_SET_RATE_PARENT, | |
1498 | 1, | |
1499 | data->fixed_divider); | |
1500 | } | |
1501 | ||
1502 | return clk; | |
1503 | } | |
1504 | ||
1505 | static struct clk *bcm2835_register_clock(struct bcm2835_cprman *cprman, | |
1506 | const struct bcm2835_clock_data *data) | |
1507 | { | |
1508 | struct bcm2835_clock *clock; | |
1509 | struct clk_init_data init; | |
6d18b8ad RP |
1510 | const char *parents[1 << CM_SRC_BITS]; |
1511 | size_t i; | |
41691b88 EA |
1512 | |
1513 | /* | |
6d18b8ad RP |
1514 | * Replace our "xosc" references with the oscillator's |
1515 | * actual name. | |
41691b88 | 1516 | */ |
6d18b8ad RP |
1517 | for (i = 0; i < data->num_mux_parents; i++) { |
1518 | if (strcmp(data->parents[i], "xosc") == 0) | |
1519 | parents[i] = cprman->osc_name; | |
1520 | else | |
1521 | parents[i] = data->parents[i]; | |
41691b88 EA |
1522 | } |
1523 | ||
1524 | memset(&init, 0, sizeof(init)); | |
6d18b8ad RP |
1525 | init.parent_names = parents; |
1526 | init.num_parents = data->num_mux_parents; | |
41691b88 EA |
1527 | init.name = data->name; |
1528 | init.flags = CLK_IGNORE_UNUSED; | |
1529 | ||
1530 | if (data->is_vpu_clock) { | |
1531 | init.ops = &bcm2835_vpu_clock_clk_ops; | |
1532 | } else { | |
1533 | init.ops = &bcm2835_clock_clk_ops; | |
1534 | init.flags |= CLK_SET_RATE_GATE | CLK_SET_PARENT_GATE; | |
1535 | } | |
1536 | ||
1537 | clock = devm_kzalloc(cprman->dev, sizeof(*clock), GFP_KERNEL); | |
1538 | if (!clock) | |
1539 | return NULL; | |
1540 | ||
1541 | clock->cprman = cprman; | |
1542 | clock->data = data; | |
1543 | clock->hw.init = &init; | |
1544 | ||
1545 | return devm_clk_register(cprman->dev, &clock->hw); | |
1546 | } | |
1547 | ||
1548 | static int bcm2835_clk_probe(struct platform_device *pdev) | |
1549 | { | |
1550 | struct device *dev = &pdev->dev; | |
1551 | struct clk **clks; | |
1552 | struct bcm2835_cprman *cprman; | |
1553 | struct resource *res; | |
1554 | ||
1555 | cprman = devm_kzalloc(dev, sizeof(*cprman), GFP_KERNEL); | |
1556 | if (!cprman) | |
1557 | return -ENOMEM; | |
1558 | ||
1559 | spin_lock_init(&cprman->regs_lock); | |
1560 | cprman->dev = dev; | |
1561 | res = platform_get_resource(pdev, IORESOURCE_MEM, 0); | |
1562 | cprman->regs = devm_ioremap_resource(dev, res); | |
1563 | if (IS_ERR(cprman->regs)) | |
1564 | return PTR_ERR(cprman->regs); | |
1565 | ||
1566 | cprman->osc_name = of_clk_get_parent_name(dev->of_node, 0); | |
1567 | if (!cprman->osc_name) | |
1568 | return -ENODEV; | |
1569 | ||
1570 | platform_set_drvdata(pdev, cprman); | |
1571 | ||
1572 | cprman->onecell.clk_num = BCM2835_CLOCK_COUNT; | |
1573 | cprman->onecell.clks = cprman->clks; | |
1574 | clks = cprman->clks; | |
1575 | ||
1576 | clks[BCM2835_PLLA] = bcm2835_register_pll(cprman, &bcm2835_plla_data); | |
1577 | clks[BCM2835_PLLB] = bcm2835_register_pll(cprman, &bcm2835_pllb_data); | |
1578 | clks[BCM2835_PLLC] = bcm2835_register_pll(cprman, &bcm2835_pllc_data); | |
1579 | clks[BCM2835_PLLD] = bcm2835_register_pll(cprman, &bcm2835_plld_data); | |
1580 | clks[BCM2835_PLLH] = bcm2835_register_pll(cprman, &bcm2835_pllh_data); | |
1581 | ||
1582 | clks[BCM2835_PLLA_CORE] = | |
1583 | bcm2835_register_pll_divider(cprman, &bcm2835_plla_core_data); | |
1584 | clks[BCM2835_PLLA_PER] = | |
1585 | bcm2835_register_pll_divider(cprman, &bcm2835_plla_per_data); | |
1586 | clks[BCM2835_PLLC_CORE0] = | |
1587 | bcm2835_register_pll_divider(cprman, &bcm2835_pllc_core0_data); | |
1588 | clks[BCM2835_PLLC_CORE1] = | |
1589 | bcm2835_register_pll_divider(cprman, &bcm2835_pllc_core1_data); | |
1590 | clks[BCM2835_PLLC_CORE2] = | |
1591 | bcm2835_register_pll_divider(cprman, &bcm2835_pllc_core2_data); | |
1592 | clks[BCM2835_PLLC_PER] = | |
1593 | bcm2835_register_pll_divider(cprman, &bcm2835_pllc_per_data); | |
1594 | clks[BCM2835_PLLD_CORE] = | |
1595 | bcm2835_register_pll_divider(cprman, &bcm2835_plld_core_data); | |
1596 | clks[BCM2835_PLLD_PER] = | |
1597 | bcm2835_register_pll_divider(cprman, &bcm2835_plld_per_data); | |
1598 | clks[BCM2835_PLLH_RCAL] = | |
1599 | bcm2835_register_pll_divider(cprman, &bcm2835_pllh_rcal_data); | |
1600 | clks[BCM2835_PLLH_AUX] = | |
1601 | bcm2835_register_pll_divider(cprman, &bcm2835_pllh_aux_data); | |
1602 | clks[BCM2835_PLLH_PIX] = | |
1603 | bcm2835_register_pll_divider(cprman, &bcm2835_pllh_pix_data); | |
1604 | ||
1605 | clks[BCM2835_CLOCK_TIMER] = | |
1606 | bcm2835_register_clock(cprman, &bcm2835_clock_timer_data); | |
1607 | clks[BCM2835_CLOCK_OTP] = | |
1608 | bcm2835_register_clock(cprman, &bcm2835_clock_otp_data); | |
1609 | clks[BCM2835_CLOCK_TSENS] = | |
1610 | bcm2835_register_clock(cprman, &bcm2835_clock_tsens_data); | |
1611 | clks[BCM2835_CLOCK_VPU] = | |
1612 | bcm2835_register_clock(cprman, &bcm2835_clock_vpu_data); | |
1613 | clks[BCM2835_CLOCK_V3D] = | |
1614 | bcm2835_register_clock(cprman, &bcm2835_clock_v3d_data); | |
1615 | clks[BCM2835_CLOCK_ISP] = | |
1616 | bcm2835_register_clock(cprman, &bcm2835_clock_isp_data); | |
1617 | clks[BCM2835_CLOCK_H264] = | |
1618 | bcm2835_register_clock(cprman, &bcm2835_clock_h264_data); | |
1619 | clks[BCM2835_CLOCK_V3D] = | |
1620 | bcm2835_register_clock(cprman, &bcm2835_clock_v3d_data); | |
1621 | clks[BCM2835_CLOCK_SDRAM] = | |
1622 | bcm2835_register_clock(cprman, &bcm2835_clock_sdram_data); | |
1623 | clks[BCM2835_CLOCK_UART] = | |
1624 | bcm2835_register_clock(cprman, &bcm2835_clock_uart_data); | |
1625 | clks[BCM2835_CLOCK_VEC] = | |
1626 | bcm2835_register_clock(cprman, &bcm2835_clock_vec_data); | |
1627 | clks[BCM2835_CLOCK_HSM] = | |
1628 | bcm2835_register_clock(cprman, &bcm2835_clock_hsm_data); | |
1629 | clks[BCM2835_CLOCK_EMMC] = | |
1630 | bcm2835_register_clock(cprman, &bcm2835_clock_emmc_data); | |
1631 | ||
1632 | /* | |
1633 | * CM_PERIICTL (and CM_PERIACTL, CM_SYSCTL and CM_VPUCTL if | |
1634 | * you have the debug bit set in the power manager, which we | |
1635 | * don't bother exposing) are individual gates off of the | |
1636 | * non-stop vpu clock. | |
1637 | */ | |
1638 | clks[BCM2835_CLOCK_PERI_IMAGE] = | |
1639 | clk_register_gate(dev, "peri_image", "vpu", | |
1640 | CLK_IGNORE_UNUSED | CLK_SET_RATE_GATE, | |
1641 | cprman->regs + CM_PERIICTL, CM_GATE_BIT, | |
1642 | 0, &cprman->regs_lock); | |
1643 | ||
cfbab8fb RP |
1644 | clks[BCM2835_CLOCK_PWM] = |
1645 | bcm2835_register_clock(cprman, &bcm2835_clock_pwm_data); | |
1646 | ||
41691b88 EA |
1647 | return of_clk_add_provider(dev->of_node, of_clk_src_onecell_get, |
1648 | &cprman->onecell); | |
1649 | } | |
1650 | ||
1651 | static const struct of_device_id bcm2835_clk_of_match[] = { | |
1652 | { .compatible = "brcm,bcm2835-cprman", }, | |
1653 | {} | |
1654 | }; | |
1655 | MODULE_DEVICE_TABLE(of, bcm2835_clk_of_match); | |
1656 | ||
1657 | static struct platform_driver bcm2835_clk_driver = { | |
1658 | .driver = { | |
1659 | .name = "bcm2835-clk", | |
1660 | .of_match_table = bcm2835_clk_of_match, | |
1661 | }, | |
1662 | .probe = bcm2835_clk_probe, | |
1663 | }; | |
1664 | ||
1665 | builtin_platform_driver(bcm2835_clk_driver); | |
1666 | ||
1667 | MODULE_AUTHOR("Eric Anholt <eric@anholt.net>"); | |
1668 | MODULE_DESCRIPTION("BCM2835 clock driver"); | |
1669 | MODULE_LICENSE("GPL v2"); |