4 * Clocks for TI816X based boards
6 * Copyright (C) 2013, Adeneo Embedded <www.adeneo-embedded.com>
7 * Antoine Tenart, <atenart@adeneo-embedded.com>
9 * Based on TI-PSP-04.00.02.14 :
11 * Copyright (C) 2009, Texas Instruments, Incorporated
13 * This program is free software; you can redistribute it and/or
14 * modify it under the terms of the GNU General Public License as
15 * published by the Free Software Foundation; either version 2 of
16 * the License, or (at your option) any later version.
18 * This program is distributed in the hope that it will be useful,
19 * but WITHOUT ANY WARRANTY; without even the implied warranty of
20 * MERCHANTABILITY or FITNESS FOR A PARTICULAR /PURPOSE. See the
21 * GNU General Public License for more details.
25 #include <asm/arch/ddr_defs.h>
26 #include <asm/arch/cpu.h>
27 #include <asm/arch/clock.h>
28 #include <asm/arch/hardware.h>
33 #define CM_PLL_BASE (CTRL_BASE + 0x0400)
38 #define MAIN_INTFREQ1 0x8
39 #define MAIN_FRACFREQ1 0x800000
40 #define MAIN_MDIV1 0x2
41 #define MAIN_INTFREQ2 0xE
42 #define MAIN_FRACFREQ2 0x0
43 #define MAIN_MDIV2 0x1
44 #define MAIN_INTFREQ3 0x8
45 #define MAIN_FRACFREQ3 0xAAAAB0
46 #define MAIN_MDIV3 0x3
47 #define MAIN_INTFREQ4 0x9
48 #define MAIN_FRACFREQ4 0x55554F
49 #define MAIN_MDIV4 0x3
50 #define MAIN_INTFREQ5 0x9
51 #define MAIN_FRACFREQ5 0x374BC6
52 #define MAIN_MDIV5 0xC
53 #define MAIN_MDIV6 0x48
54 #define MAIN_MDIV7 0x4
57 #if defined(CONFIG_TI816X_DDR_PLL_400) /* 400 MHz */
61 #define DDR_INTFREQ2 0x8
62 #define DDR_FRACFREQ2 0xD99999
63 #define DDR_MDIV2 0x1E
64 #define DDR_INTFREQ3 0x8
65 #define DDR_FRACFREQ3 0x0
67 #define DDR_INTFREQ4 0xE /* Expansion DDR clk */
68 #define DDR_FRACFREQ4 0x0
70 #define DDR_INTFREQ5 0xE /* Expansion DDR clk */
71 #define DDR_FRACFREQ5 0x0
73 #elif defined(CONFIG_TI816X_DDR_PLL_531) /* 531 MHz */
77 #define DDR_INTFREQ2 0x8
78 #define DDR_FRACFREQ2 0xD99999
79 #define DDR_MDIV2 0x1E
80 #define DDR_INTFREQ3 0x8
81 #define DDR_FRACFREQ3 0x0
83 #define DDR_INTFREQ4 0xE /* Expansion DDR clk */
84 #define DDR_FRACFREQ4 0x0
86 #define DDR_INTFREQ5 0xE /* Expansion DDR clk */
87 #define DDR_FRACFREQ5 0x0
89 #elif defined(CONFIG_TI816X_DDR_PLL_675) /* 675 MHz */
93 #define DDR_INTFREQ2 0x9
94 #define DDR_FRACFREQ2 0x0
95 #define DDR_MDIV2 0x19
96 #define DDR_INTFREQ3 0x13
97 #define DDR_FRACFREQ3 0x800000
99 #define DDR_INTFREQ4 0xE /* Expansion DDR clk */
100 #define DDR_FRACFREQ4 0x0
101 #define DDR_MDIV4 0x4
102 #define DDR_INTFREQ5 0xE /* Expansion DDR clk */
103 #define DDR_FRACFREQ5 0x0
104 #define DDR_MDIV5 0x4
105 #elif defined(CONFIG_TI816X_DDR_PLL_796) /* 796 MHz */
108 #define DDR_MDIV1 0x2
109 #define DDR_INTFREQ2 0x8
110 #define DDR_FRACFREQ2 0xD99999
111 #define DDR_MDIV2 0x1E
112 #define DDR_INTFREQ3 0x8
113 #define DDR_FRACFREQ3 0x0
114 #define DDR_MDIV3 0x4
115 #define DDR_INTFREQ4 0xE /* Expansion DDR clk */
116 #define DDR_FRACFREQ4 0x0
117 #define DDR_MDIV4 0x4
118 #define DDR_INTFREQ5 0xE /* Expansion DDR clk */
119 #define DDR_FRACFREQ5 0x0
120 #define DDR_MDIV5 0x4
123 #define CONTROL_STATUS (CTRL_BASE + 0x40)
124 #define DDR_RCD (CTRL_BASE + 0x070C)
125 #define CM_TIMER1_CLKSEL (PRCM_BASE + 0x390)
126 #define DMM_PAT_BASE_ADDR (DMM_BASE + 0x420)
127 #define CM_ALWON_CUST_EFUSE_CLKCTRL (PRCM_BASE + 0x1628)
129 #define INTCPS_SYSCONFIG 0x48200010
130 #define CM_SYSCLK10_CLKSEL 0x48180324
133 unsigned int mainpll_ctrl; /* offset 0x400 */
134 unsigned int mainpll_pwd;
135 unsigned int mainpll_freq1;
136 unsigned int mainpll_div1;
137 unsigned int mainpll_freq2;
138 unsigned int mainpll_div2;
139 unsigned int mainpll_freq3;
140 unsigned int mainpll_div3;
141 unsigned int mainpll_freq4;
142 unsigned int mainpll_div4;
143 unsigned int mainpll_freq5;
144 unsigned int mainpll_div5;
145 unsigned int resv0[1];
146 unsigned int mainpll_div6;
147 unsigned int resv1[1];
148 unsigned int mainpll_div7;
149 unsigned int ddrpll_ctrl; /* offset 0x440 */
150 unsigned int ddrpll_pwd;
151 unsigned int resv2[1];
152 unsigned int ddrpll_div1;
153 unsigned int ddrpll_freq2;
154 unsigned int ddrpll_div2;
155 unsigned int ddrpll_freq3;
156 unsigned int ddrpll_div3;
157 unsigned int ddrpll_freq4;
158 unsigned int ddrpll_div4;
159 unsigned int ddrpll_freq5;
160 unsigned int ddrpll_div5;
161 unsigned int videopll_ctrl; /* offset 0x470 */
162 unsigned int videopll_pwd;
163 unsigned int videopll_freq1;
164 unsigned int videopll_div1;
165 unsigned int videopll_freq2;
166 unsigned int videopll_div2;
167 unsigned int videopll_freq3;
168 unsigned int videopll_div3;
169 unsigned int resv3[4];
170 unsigned int audiopll_ctrl; /* offset 0x4A0 */
171 unsigned int audiopll_pwd;
172 unsigned int resv4[2];
173 unsigned int audiopll_freq2;
174 unsigned int audiopll_div2;
175 unsigned int audiopll_freq3;
176 unsigned int audiopll_div3;
177 unsigned int audiopll_freq4;
178 unsigned int audiopll_div4;
179 unsigned int audiopll_freq5;
180 unsigned int audiopll_div5;
183 const struct cm_alwon *cmalwon = (struct cm_alwon *)CM_ALWON_BASE;
184 const struct cm_def *cmdef = (struct cm_def *)CM_DEFAULT_BASE;
185 const struct cm_pll *cmpll = (struct cm_pll *)CM_PLL_BASE;
186 const struct wd_timer *wdtimer = (struct wd_timer *)WDT_BASE;
188 void enable_dmm_clocks(void)
190 writel(PRCM_MOD_EN, &cmdef->l3fastclkstctrl);
191 writel(PRCM_MOD_EN, &cmdef->emif0clkctrl);
192 writel(PRCM_MOD_EN, &cmdef->emif1clkctrl);
194 /* Wait for clocks to be active */
195 while ((readl(&cmdef->l3fastclkstctrl) & 0x300) != 0x300)
197 /* Wait for emif0 to be fully functional, including OCP */
198 while (((readl(&cmdef->emif0clkctrl) >> 17) & 0x3) != 0)
200 /* Wait for emif1 to be fully functional, including OCP */
201 while (((readl(&cmdef->emif1clkctrl) >> 17) & 0x3) != 0)
204 writel(PRCM_MOD_EN, &cmdef->dmmclkctrl);
205 /* Wait for dmm to be fully functional, including OCP */
206 while (((readl(&cmdef->dmmclkctrl) >> 17) & 0x3) != 0)
209 /* Enable Tiled Access */
210 writel(0x80000000, DMM_PAT_BASE_ADDR);
213 /* assume delay is aprox at least 1us */
214 static void ddr_delay(int d)
219 * read a control register.
220 * this is a bit more delay and cannot be optimized by the compiler
221 * assuming one read takes 200 cycles and A8 is runing 1 GHz
222 * somewhat conservative setting
224 for (i = 0; i < 50*d; i++)
225 readl(CONTROL_STATUS);
228 static void main_pll_init_ti816x(void)
230 u32 main_pll_ctrl = 0;
232 /* Put the PLL in bypass mode by setting BIT2 in its ctrl reg */
233 main_pll_ctrl = readl(&cmpll->mainpll_ctrl);
234 main_pll_ctrl &= 0xFFFFFFFB;
235 main_pll_ctrl |= BIT(2);
236 writel(main_pll_ctrl, &cmpll->mainpll_ctrl);
238 /* Enable PLL by setting BIT3 in its ctrl reg */
239 main_pll_ctrl = readl(&cmpll->mainpll_ctrl);
240 main_pll_ctrl &= 0xFFFFFFF7;
241 main_pll_ctrl |= BIT(3);
242 writel(main_pll_ctrl, &cmpll->mainpll_ctrl);
244 /* Write the values of N,P in the CTRL reg */
245 main_pll_ctrl = readl(&cmpll->mainpll_ctrl);
246 main_pll_ctrl &= 0xFF;
247 main_pll_ctrl |= (MAIN_N<<16 | MAIN_P<<8);
248 writel(main_pll_ctrl, &cmpll->mainpll_ctrl);
250 /* Power up clock1-7 */
251 writel(0x0, &cmpll->mainpll_pwd);
253 /* Program the freq and divider values for clock1-7 */
254 writel((1<<31 | 1<<28 | (MAIN_INTFREQ1<<24) | MAIN_FRACFREQ1),
255 &cmpll->mainpll_freq1);
256 writel(((1<<8) | MAIN_MDIV1), &cmpll->mainpll_div1);
258 writel((1<<31 | 1<<28 | (MAIN_INTFREQ2<<24) | MAIN_FRACFREQ2),
259 &cmpll->mainpll_freq2);
260 writel(((1<<8) | MAIN_MDIV2), &cmpll->mainpll_div2);
262 writel((1<<31 | 1<<28 | (MAIN_INTFREQ3<<24) | MAIN_FRACFREQ3),
263 &cmpll->mainpll_freq3);
264 writel(((1<<8) | MAIN_MDIV3), &cmpll->mainpll_div3);
266 writel((1<<31 | 1<<28 | (MAIN_INTFREQ4<<24) | MAIN_FRACFREQ4),
267 &cmpll->mainpll_freq4);
268 writel(((1<<8) | MAIN_MDIV4), &cmpll->mainpll_div4);
270 writel((1<<31 | 1<<28 | (MAIN_INTFREQ5<<24) | MAIN_FRACFREQ5),
271 &cmpll->mainpll_freq5);
272 writel(((1<<8) | MAIN_MDIV5), &cmpll->mainpll_div5);
274 writel((1<<8 | MAIN_MDIV6), &cmpll->mainpll_div6);
276 writel((1<<8 | MAIN_MDIV7), &cmpll->mainpll_div7);
278 /* Wait for PLL to lock */
279 while ((readl(&cmpll->mainpll_ctrl) & BIT(7)) != BIT(7))
282 /* Put the PLL in normal mode, disable bypass */
283 main_pll_ctrl = readl(&cmpll->mainpll_ctrl);
284 main_pll_ctrl &= 0xFFFFFFFB;
285 writel(main_pll_ctrl, &cmpll->mainpll_ctrl);
288 static void ddr_pll_bypass_ti816x(void)
290 u32 ddr_pll_ctrl = 0;
292 /* Put the PLL in bypass mode by setting BIT2 in its ctrl reg */
293 ddr_pll_ctrl = readl(&cmpll->ddrpll_ctrl);
294 ddr_pll_ctrl &= 0xFFFFFFFB;
295 ddr_pll_ctrl |= BIT(2);
296 writel(ddr_pll_ctrl, &cmpll->ddrpll_ctrl);
299 static void ddr_pll_init_ti816x(void)
301 u32 ddr_pll_ctrl = 0;
302 /* Enable PLL by setting BIT3 in its ctrl reg */
303 ddr_pll_ctrl = readl(&cmpll->ddrpll_ctrl);
304 ddr_pll_ctrl &= 0xFFFFFFF7;
305 ddr_pll_ctrl |= BIT(3);
306 writel(ddr_pll_ctrl, &cmpll->ddrpll_ctrl);
308 /* Write the values of N,P in the CTRL reg */
309 ddr_pll_ctrl = readl(&cmpll->ddrpll_ctrl);
310 ddr_pll_ctrl &= 0xFF;
311 ddr_pll_ctrl |= (DDR_N<<16 | DDR_P<<8);
312 writel(ddr_pll_ctrl, &cmpll->ddrpll_ctrl);
316 /* Power up clock1-5 */
317 writel(0x0, &cmpll->ddrpll_pwd);
319 /* Program the freq and divider values for clock1-3 */
320 writel(((0<<8) | DDR_MDIV1), &cmpll->ddrpll_div1);
322 writel(((1<<8) | DDR_MDIV1), &cmpll->ddrpll_div1);
323 writel((1<<31 | 1<<28 | (DDR_INTFREQ2<<24) | DDR_FRACFREQ2),
324 &cmpll->ddrpll_freq2);
325 writel(((1<<8) | DDR_MDIV2), &cmpll->ddrpll_div2);
326 writel(((0<<8) | DDR_MDIV3), &cmpll->ddrpll_div3);
328 writel(((1<<8) | DDR_MDIV3), &cmpll->ddrpll_div3);
330 writel((0<<31 | 1<<28 | (DDR_INTFREQ3<<24) | DDR_FRACFREQ3),
331 &cmpll->ddrpll_freq3);
333 writel((1<<31 | 1<<28 | (DDR_INTFREQ3<<24) | DDR_FRACFREQ3),
334 &cmpll->ddrpll_freq3);
338 /* Wait for PLL to lock */
339 while ((readl(&cmpll->ddrpll_ctrl) & BIT(7)) != BIT(7))
343 writel(BIT(0), DDR_RCD);
346 static void peripheral_enable(void)
348 /* Wake-up the l3_slow clock */
349 writel(PRCM_MOD_EN, &cmalwon->l3slowclkstctrl);
353 * There are 8 timers(0-7) out of which timer 0 is a secure timer.
354 * Timer 0 mux should not be changed
356 * To access the timer registers we need the to be
357 * enabled which is what we do in the first step
361 writel(PRCM_MOD_EN, &cmalwon->timer1clkctrl);
362 /* Select timer1 clock to be CLKIN (27MHz) */
363 writel(BIT(1), CM_TIMER1_CLKSEL);
365 /* Wait for timer1 to be ON-ACTIVE */
366 while (((readl(&cmalwon->l3slowclkstctrl)
367 & (0x80000<<1))>>20) != 1)
369 /* Wait for timer1 to be enabled */
370 while (((readl(&cmalwon->timer1clkctrl) & 0x30000)>>16) != 0)
372 /* Active posted mode */
373 writel(PRCM_MOD_EN, (DM_TIMER1_BASE + 0x54));
374 while (readl(DM_TIMER1_BASE + 0x10) & BIT(0))
377 writel(BIT(0), (DM_TIMER1_BASE + 0x38));
380 writel(PRCM_MOD_EN, CM_ALWON_CUST_EFUSE_CLKCTRL);
381 while (readl(CM_ALWON_CUST_EFUSE_CLKCTRL) != PRCM_MOD_EN)
385 writel(PRCM_MOD_EN, &cmalwon->gpio0clkctrl);
386 while (readl(&cmalwon->gpio0clkctrl) != PRCM_MOD_EN)
388 writel((BIT(8)), &cmalwon->gpio0clkctrl);
391 writel(PRCM_MOD_EN, &cmalwon->spiclkctrl);
392 while (readl(&cmalwon->spiclkctrl) != PRCM_MOD_EN)
396 writel(PRCM_MOD_EN, &cmalwon->i2c0clkctrl);
397 while (readl(&cmalwon->i2c0clkctrl) != PRCM_MOD_EN)
400 /* Enable ethernet0 */
401 writel(PRCM_MOD_EN, &cmalwon->ethclkstctrl);
402 writel(PRCM_MOD_EN, &cmalwon->ethernet0clkctrl);
403 writel(PRCM_MOD_EN, &cmalwon->ethernet1clkctrl);
406 writel(PRCM_MOD_EN, &cmalwon->sdioclkctrl);
407 while (readl(&cmalwon->sdioclkctrl) != PRCM_MOD_EN)
411 void setup_clocks_for_console(void)
413 /* Fix ROM code bug - from TI-PSP-04.00.02.14 */
414 writel(0x0, CM_SYSCLK10_CLKSEL);
416 ddr_pll_bypass_ti816x();
419 writel(PRCM_MOD_EN, &cmalwon->uart0clkctrl);
420 while (readl(&cmalwon->uart0clkctrl) != PRCM_MOD_EN)
422 writel(PRCM_MOD_EN, &cmalwon->uart1clkctrl);
423 while (readl(&cmalwon->uart1clkctrl) != PRCM_MOD_EN)
425 writel(PRCM_MOD_EN, &cmalwon->uart2clkctrl);
426 while (readl(&cmalwon->uart2clkctrl) != PRCM_MOD_EN)
428 while ((readl(&cmalwon->l3slowclkstctrl) & 0x2100) != 0x2100)
432 void setup_early_clocks(void)
434 setup_clocks_for_console();
439 /* Enable the control */
440 writel(PRCM_MOD_EN, &cmalwon->controlclkctrl);
442 main_pll_init_ti816x();
443 ddr_pll_init_ti816x();
446 * With clk freqs setup to desired values,
447 * enable the required peripherals