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Chen-Yu Tsai14177e42014-10-03 20:16:25 +08001/*
2 * sun6i specific clock code
3 *
4 * (C) Copyright 2007-2012
5 * Allwinner Technology Co., Ltd. <www.allwinnertech.com>
6 * Tom Cubie <tangliang@allwinnertech.com>
7 *
8 * (C) Copyright 2013 Luke Kenneth Casson Leighton <lkcl@lkcl.net>
9 *
10 * SPDX-License-Identifier: GPL-2.0+
11 */
12
13#include <common.h>
14#include <asm/io.h>
15#include <asm/arch/clock.h>
Chen-Yu Tsaic757a502014-10-22 16:47:47 +080016#include <asm/arch/prcm.h>
Chen-Yu Tsai14177e42014-10-03 20:16:25 +080017#include <asm/arch/sys_proto.h>
18
Hans de Goede62c87ef2014-10-25 20:16:33 +020019#ifdef CONFIG_SPL_BUILD
20void clock_init_safe(void)
21{
22 struct sunxi_ccm_reg * const ccm =
23 (struct sunxi_ccm_reg *)SUNXI_CCM_BASE;
Andre Przywara28654332017-01-02 11:48:25 +000024
Andre Przywara7b82a222017-02-16 01:20:27 +000025#if !defined(CONFIG_MACH_SUNXI_H3_H5) && !defined(CONFIG_MACH_SUN50I)
Hans de Goede62c87ef2014-10-25 20:16:33 +020026 struct sunxi_prcm_reg * const prcm =
27 (struct sunxi_prcm_reg *)SUNXI_PRCM_BASE;
28
29 /* Set PLL ldo voltage without this PLL6 does not work properly */
30 clrsetbits_le32(&prcm->pll_ctrl1, PRCM_PLL_CTRL_LDO_KEY_MASK,
31 PRCM_PLL_CTRL_LDO_KEY);
32 clrsetbits_le32(&prcm->pll_ctrl1, ~PRCM_PLL_CTRL_LDO_KEY_MASK,
33 PRCM_PLL_CTRL_LDO_DIGITAL_EN | PRCM_PLL_CTRL_LDO_ANALOG_EN |
34 PRCM_PLL_CTRL_EXT_OSC_EN | PRCM_PLL_CTRL_LDO_OUT_L(1140));
35 clrbits_le32(&prcm->pll_ctrl1, PRCM_PLL_CTRL_LDO_KEY_MASK);
Andre Przywara28654332017-01-02 11:48:25 +000036#endif
Hans de Goede62c87ef2014-10-25 20:16:33 +020037
Jernej Skrabec1ae5def2017-03-27 19:22:31 +020038#if defined(CONFIG_MACH_SUN8I_R40) || defined(CONFIG_MACH_SUN50I)
Chen-Yu Tsai328ce7f2016-11-30 16:54:34 +080039 /* Set PLL lock enable bits and switch to old lock mode */
40 writel(GENMASK(12, 0), &ccm->pll_lock_ctrl);
41#endif
42
Hans de Goede62c87ef2014-10-25 20:16:33 +020043 clock_set_pll1(408000000);
44
Hans de Goede62c87ef2014-10-25 20:16:33 +020045 writel(PLL6_CFG_DEFAULT, &ccm->pll6_cfg);
Siarhei Siamashka52d09312015-11-20 07:07:48 +020046 while (!(readl(&ccm->pll6_cfg) & CCM_PLL6_CTRL_LOCK))
47 ;
48
49 writel(AHB1_ABP1_DIV_DEFAULT, &ccm->ahb1_apb1_div);
Hans de Goede62c87ef2014-10-25 20:16:33 +020050
51 writel(MBUS_CLK_DEFAULT, &ccm->mbus0_clk_cfg);
Andre Przywara28654332017-01-02 11:48:25 +000052 if (IS_ENABLED(CONFIG_MACH_SUN6I))
53 writel(MBUS_CLK_DEFAULT, &ccm->mbus1_clk_cfg);
Hans de Goede62c87ef2014-10-25 20:16:33 +020054}
55#endif
56
Chen-Yu Tsaied805842016-01-06 15:13:07 +080057void clock_init_sec(void)
58{
Andre Przywara7b82a222017-02-16 01:20:27 +000059#ifdef CONFIG_MACH_SUNXI_H3_H5
Chen-Yu Tsaied805842016-01-06 15:13:07 +080060 struct sunxi_ccm_reg * const ccm =
61 (struct sunxi_ccm_reg *)SUNXI_CCM_BASE;
62
63 setbits_le32(&ccm->ccu_sec_switch,
64 CCM_SEC_SWITCH_MBUS_NONSEC |
65 CCM_SEC_SWITCH_BUS_NONSEC |
66 CCM_SEC_SWITCH_PLL_NONSEC);
67#endif
68}
69
Chen-Yu Tsai14177e42014-10-03 20:16:25 +080070void clock_init_uart(void)
71{
Hans de Goede22b61832015-01-14 19:28:38 +010072#if CONFIG_CONS_INDEX < 5
Chen-Yu Tsai14177e42014-10-03 20:16:25 +080073 struct sunxi_ccm_reg *const ccm =
74 (struct sunxi_ccm_reg *)SUNXI_CCM_BASE;
75
76 /* uart clock source is apb2 */
77 writel(APB2_CLK_SRC_OSC24M|
78 APB2_CLK_RATE_N_1|
79 APB2_CLK_RATE_M(1),
80 &ccm->apb2_div);
81
82 /* open the clock for uart */
83 setbits_le32(&ccm->apb2_gate,
84 CLK_GATE_OPEN << (APB2_GATE_UART_SHIFT +
85 CONFIG_CONS_INDEX - 1));
86
87 /* deassert uart reset */
88 setbits_le32(&ccm->apb2_reset_cfg,
89 1 << (APB2_RESET_UART_SHIFT +
90 CONFIG_CONS_INDEX - 1));
Chen-Yu Tsaic757a502014-10-22 16:47:47 +080091#else
92 /* enable R_PIO and R_UART clocks, and de-assert resets */
93 prcm_apb0_enable(PRCM_APB0_GATE_PIO | PRCM_APB0_GATE_UART);
94#endif
Chen-Yu Tsai14177e42014-10-03 20:16:25 +080095}
96
Hans de Goede62c87ef2014-10-25 20:16:33 +020097#ifdef CONFIG_SPL_BUILD
98void clock_set_pll1(unsigned int clk)
99{
100 struct sunxi_ccm_reg * const ccm =
101 (struct sunxi_ccm_reg *)SUNXI_CCM_BASE;
Hans de Goede25508ab2014-12-27 17:56:59 +0100102 const int p = 0;
Hans de Goede62c87ef2014-10-25 20:16:33 +0200103 int k = 1;
104 int m = 1;
105
106 if (clk > 1152000000) {
107 k = 2;
108 } else if (clk > 768000000) {
109 k = 3;
110 m = 2;
111 }
112
113 /* Switch to 24MHz clock while changing PLL1 */
114 writel(AXI_DIV_3 << AXI_DIV_SHIFT |
115 ATB_DIV_2 << ATB_DIV_SHIFT |
116 CPU_CLK_SRC_OSC24M << CPU_CLK_SRC_SHIFT,
117 &ccm->cpu_axi_cfg);
118
Hans de Goede25508ab2014-12-27 17:56:59 +0100119 /*
120 * sun6i: PLL1 rate = ((24000000 * n * k) >> 0) / m (p is ignored)
121 * sun8i: PLL1 rate = ((24000000 * n * k) >> p) / m
122 */
123 writel(CCM_PLL1_CTRL_EN | CCM_PLL1_CTRL_P(p) |
Hans de Goede62c87ef2014-10-25 20:16:33 +0200124 CCM_PLL1_CTRL_N(clk / (24000000 * k / m)) |
125 CCM_PLL1_CTRL_K(k) | CCM_PLL1_CTRL_M(m), &ccm->pll1_cfg);
126 sdelay(200);
127
128 /* Switch CPU to PLL1 */
129 writel(AXI_DIV_3 << AXI_DIV_SHIFT |
130 ATB_DIV_2 << ATB_DIV_SHIFT |
131 CPU_CLK_SRC_PLL1 << CPU_CLK_SRC_SHIFT,
132 &ccm->cpu_axi_cfg);
133}
134#endif
135
Hans de Goede0bd51252014-11-08 14:07:27 +0100136void clock_set_pll3(unsigned int clk)
137{
138 struct sunxi_ccm_reg * const ccm =
139 (struct sunxi_ccm_reg *)SUNXI_CCM_BASE;
140 const int m = 8; /* 3 MHz steps just like sun4i, sun5i and sun7i */
141
142 if (clk == 0) {
143 clrbits_le32(&ccm->pll3_cfg, CCM_PLL3_CTRL_EN);
144 return;
145 }
146
147 /* PLL3 rate = 24000000 * n / m */
148 writel(CCM_PLL3_CTRL_EN | CCM_PLL3_CTRL_INTEGER_MODE |
149 CCM_PLL3_CTRL_N(clk / (24000000 / m)) | CCM_PLL3_CTRL_M(m),
150 &ccm->pll3_cfg);
151}
152
Jernej Skrabec1ae5def2017-03-27 19:22:31 +0200153#ifdef CONFIG_SUNXI_DE2
154void clock_set_pll3_factors(int m, int n)
155{
156 struct sunxi_ccm_reg * const ccm =
157 (struct sunxi_ccm_reg *)SUNXI_CCM_BASE;
158
159 /* PLL3 rate = 24000000 * n / m */
160 writel(CCM_PLL3_CTRL_EN | CCM_PLL3_CTRL_INTEGER_MODE |
161 CCM_PLL3_CTRL_N(n) | CCM_PLL3_CTRL_M(m),
162 &ccm->pll3_cfg);
163
164 while (!(readl(&ccm->pll3_cfg) & CCM_PLL3_CTRL_LOCK))
165 ;
166}
167#endif
168
Hans de Goede5af741f2014-11-30 11:58:17 +0100169void clock_set_pll5(unsigned int clk, bool sigma_delta_enable)
Hans de Goede62c87ef2014-10-25 20:16:33 +0200170{
171 struct sunxi_ccm_reg * const ccm =
172 (struct sunxi_ccm_reg *)SUNXI_CCM_BASE;
Hans de Goede1aac47b2014-12-07 21:09:31 +0100173 const int max_n = 32;
174 int k = 1, m = 2;
Hans de Goede62c87ef2014-10-25 20:16:33 +0200175
Andre Przywara7b82a222017-02-16 01:20:27 +0000176#ifdef CONFIG_MACH_SUNXI_H3_H5
Jens Kusked5ac6ee2016-08-19 13:40:46 +0200177 clrsetbits_le32(&ccm->pll5_tuning_cfg, CCM_PLL5_TUN_LOCK_TIME_MASK |
178 CCM_PLL5_TUN_INIT_FREQ_MASK,
179 CCM_PLL5_TUN_LOCK_TIME(2) | CCM_PLL5_TUN_INIT_FREQ(16));
180#endif
181
Hans de Goede5af741f2014-11-30 11:58:17 +0100182 if (sigma_delta_enable)
183 writel(CCM_PLL5_PATTERN, &ccm->pll5_pattern_cfg);
184
Hans de Goede62c87ef2014-10-25 20:16:33 +0200185 /* PLL5 rate = 24000000 * n * k / m */
Hans de Goede1aac47b2014-12-07 21:09:31 +0100186 if (clk > 24000000 * k * max_n / m) {
187 m = 1;
188 if (clk > 24000000 * k * max_n / m)
189 k = 2;
190 }
Hans de Goede5af741f2014-11-30 11:58:17 +0100191 writel(CCM_PLL5_CTRL_EN |
192 (sigma_delta_enable ? CCM_PLL5_CTRL_SIGMA_DELTA_EN : 0) |
193 CCM_PLL5_CTRL_UPD |
Hans de Goede62c87ef2014-10-25 20:16:33 +0200194 CCM_PLL5_CTRL_N(clk / (24000000 * k / m)) |
195 CCM_PLL5_CTRL_K(k) | CCM_PLL5_CTRL_M(m), &ccm->pll5_cfg);
196
197 udelay(5500);
198}
199
Hans de Goede55ea98d2015-08-08 14:05:35 +0200200#ifdef CONFIG_MACH_SUN6I
201void clock_set_mipi_pll(unsigned int clk)
202{
203 struct sunxi_ccm_reg * const ccm =
204 (struct sunxi_ccm_reg *)SUNXI_CCM_BASE;
205 unsigned int k, m, n, value, diff;
206 unsigned best_k = 0, best_m = 0, best_n = 0, best_diff = 0xffffffff;
207 unsigned int src = clock_get_pll3();
208
209 /* All calculations are in KHz to avoid overflows */
210 clk /= 1000;
211 src /= 1000;
212
213 /* Pick the closest lower clock */
214 for (k = 1; k <= 4; k++) {
215 for (m = 1; m <= 16; m++) {
216 for (n = 1; n <= 16; n++) {
217 value = src * n * k / m;
218 if (value > clk)
219 continue;
220
221 diff = clk - value;
222 if (diff < best_diff) {
223 best_diff = diff;
224 best_k = k;
225 best_m = m;
226 best_n = n;
227 }
228 if (diff == 0)
229 goto done;
230 }
231 }
232 }
233
234done:
235 writel(CCM_MIPI_PLL_CTRL_EN | CCM_MIPI_PLL_CTRL_LDO_EN |
236 CCM_MIPI_PLL_CTRL_N(best_n) | CCM_MIPI_PLL_CTRL_K(best_k) |
237 CCM_MIPI_PLL_CTRL_M(best_m), &ccm->mipi_pll_cfg);
238}
239#endif
240
Jernej Skrabec1ae5def2017-03-27 19:22:31 +0200241#ifdef CONFIG_SUNXI_DE2
242void clock_set_pll10(unsigned int clk)
243{
244 struct sunxi_ccm_reg * const ccm =
245 (struct sunxi_ccm_reg *)SUNXI_CCM_BASE;
246 const int m = 2; /* 12 MHz steps */
247
248 if (clk == 0) {
249 clrbits_le32(&ccm->pll10_cfg, CCM_PLL10_CTRL_EN);
250 return;
251 }
252
253 /* PLL10 rate = 24000000 * n / m */
254 writel(CCM_PLL10_CTRL_EN | CCM_PLL10_CTRL_INTEGER_MODE |
255 CCM_PLL10_CTRL_N(clk / (24000000 / m)) | CCM_PLL10_CTRL_M(m),
256 &ccm->pll10_cfg);
257
258 while (!(readl(&ccm->pll10_cfg) & CCM_PLL10_CTRL_LOCK))
259 ;
260}
261#endif
262
Chen-Yu Tsai82011882016-12-01 19:09:57 +0800263#if defined(CONFIG_MACH_SUN8I_A33) || \
264 defined(CONFIG_MACH_SUN8I_R40) || \
265 defined(CONFIG_MACH_SUN50I)
Hans de Goede886a7b42015-04-12 11:46:41 +0200266void clock_set_pll11(unsigned int clk, bool sigma_delta_enable)
267{
268 struct sunxi_ccm_reg * const ccm =
269 (struct sunxi_ccm_reg *)SUNXI_CCM_BASE;
270
271 if (sigma_delta_enable)
Philipp Tomsichb5561592017-01-02 11:48:41 +0000272 writel(CCM_PLL11_PATTERN, &ccm->pll11_pattern_cfg0);
Hans de Goede886a7b42015-04-12 11:46:41 +0200273
274 writel(CCM_PLL11_CTRL_EN | CCM_PLL11_CTRL_UPD |
275 (sigma_delta_enable ? CCM_PLL11_CTRL_SIGMA_DELTA_EN : 0) |
276 CCM_PLL11_CTRL_N(clk / 24000000), &ccm->pll11_cfg);
277
278 while (readl(&ccm->pll11_cfg) & CCM_PLL11_CTRL_UPD)
279 ;
280}
281#endif
282
Hans de Goede49043cb2015-08-08 12:36:44 +0200283unsigned int clock_get_pll3(void)
284{
285 struct sunxi_ccm_reg *const ccm =
286 (struct sunxi_ccm_reg *)SUNXI_CCM_BASE;
287 uint32_t rval = readl(&ccm->pll3_cfg);
288 int n = ((rval & CCM_PLL3_CTRL_N_MASK) >> CCM_PLL3_CTRL_N_SHIFT) + 1;
289 int m = ((rval & CCM_PLL3_CTRL_M_MASK) >> CCM_PLL3_CTRL_M_SHIFT) + 1;
290
291 /* Multiply by 1000 after dividing by m to avoid integer overflows */
292 return (24000 * n / m) * 1000;
293}
294
Chen-Yu Tsai14177e42014-10-03 20:16:25 +0800295unsigned int clock_get_pll6(void)
296{
297 struct sunxi_ccm_reg *const ccm =
298 (struct sunxi_ccm_reg *)SUNXI_CCM_BASE;
299 uint32_t rval = readl(&ccm->pll6_cfg);
300 int n = ((rval & CCM_PLL6_CTRL_N_MASK) >> CCM_PLL6_CTRL_N_SHIFT) + 1;
301 int k = ((rval & CCM_PLL6_CTRL_K_MASK) >> CCM_PLL6_CTRL_K_SHIFT) + 1;
302 return 24000000 * n * k / 2;
303}
Hans de Goede0bd51252014-11-08 14:07:27 +0100304
Hans de Goede55ea98d2015-08-08 14:05:35 +0200305unsigned int clock_get_mipi_pll(void)
306{
307 struct sunxi_ccm_reg *const ccm =
308 (struct sunxi_ccm_reg *)SUNXI_CCM_BASE;
309 uint32_t rval = readl(&ccm->mipi_pll_cfg);
310 unsigned int n = ((rval & CCM_MIPI_PLL_CTRL_N_MASK) >> CCM_MIPI_PLL_CTRL_N_SHIFT) + 1;
311 unsigned int k = ((rval & CCM_MIPI_PLL_CTRL_K_MASK) >> CCM_MIPI_PLL_CTRL_K_SHIFT) + 1;
312 unsigned int m = ((rval & CCM_MIPI_PLL_CTRL_M_MASK) >> CCM_MIPI_PLL_CTRL_M_SHIFT) + 1;
313 unsigned int src = clock_get_pll3();
314
315 /* Multiply by 1000 after dividing by m to avoid integer overflows */
316 return ((src / 1000) * n * k / m) * 1000;
317}
318
Hans de Goede0bd51252014-11-08 14:07:27 +0100319void clock_set_de_mod_clock(u32 *clk_cfg, unsigned int hz)
320{
321 int pll = clock_get_pll6() * 2;
322 int div = 1;
323
324 while ((pll / div) > hz)
325 div++;
326
327 writel(CCM_DE_CTRL_GATE | CCM_DE_CTRL_PLL6_2X | CCM_DE_CTRL_M(div),
328 clk_cfg);
329}