2 * sun6i specific clock code
4 * (C) Copyright 2007-2012
5 * Allwinner Technology Co., Ltd. <www.allwinnertech.com>
6 * Tom Cubie <tangliang@allwinnertech.com>
8 * (C) Copyright 2013 Luke Kenneth Casson Leighton <lkcl@lkcl.net>
10 * SPDX-License-Identifier: GPL-2.0+
15 #include <asm/arch/clock.h>
16 #include <asm/arch/prcm.h>
17 #include <asm/arch/sys_proto.h>
19 #ifdef CONFIG_SPL_BUILD
20 void clock_init_safe(void)
22 struct sunxi_ccm_reg * const ccm =
23 (struct sunxi_ccm_reg *)SUNXI_CCM_BASE;
24 struct sunxi_prcm_reg * const prcm =
25 (struct sunxi_prcm_reg *)SUNXI_PRCM_BASE;
27 /* Set PLL ldo voltage without this PLL6 does not work properly */
28 clrsetbits_le32(&prcm->pll_ctrl1, PRCM_PLL_CTRL_LDO_KEY_MASK,
29 PRCM_PLL_CTRL_LDO_KEY);
30 clrsetbits_le32(&prcm->pll_ctrl1, ~PRCM_PLL_CTRL_LDO_KEY_MASK,
31 PRCM_PLL_CTRL_LDO_DIGITAL_EN | PRCM_PLL_CTRL_LDO_ANALOG_EN |
32 PRCM_PLL_CTRL_EXT_OSC_EN | PRCM_PLL_CTRL_LDO_OUT_L(1140));
33 clrbits_le32(&prcm->pll_ctrl1, PRCM_PLL_CTRL_LDO_KEY_MASK);
35 clock_set_pll1(408000000);
37 writel(PLL6_CFG_DEFAULT, &ccm->pll6_cfg);
38 while (!(readl(&ccm->pll6_cfg) & CCM_PLL6_CTRL_LOCK))
41 writel(AHB1_ABP1_DIV_DEFAULT, &ccm->ahb1_apb1_div);
43 writel(MBUS_CLK_DEFAULT, &ccm->mbus0_clk_cfg);
44 writel(MBUS_CLK_DEFAULT, &ccm->mbus1_clk_cfg);
48 void clock_init_uart(void)
50 #if CONFIG_CONS_INDEX < 5
51 struct sunxi_ccm_reg *const ccm =
52 (struct sunxi_ccm_reg *)SUNXI_CCM_BASE;
54 /* uart clock source is apb2 */
55 writel(APB2_CLK_SRC_OSC24M|
60 /* open the clock for uart */
61 setbits_le32(&ccm->apb2_gate,
62 CLK_GATE_OPEN << (APB2_GATE_UART_SHIFT +
63 CONFIG_CONS_INDEX - 1));
65 /* deassert uart reset */
66 setbits_le32(&ccm->apb2_reset_cfg,
67 1 << (APB2_RESET_UART_SHIFT +
68 CONFIG_CONS_INDEX - 1));
70 /* enable R_PIO and R_UART clocks, and de-assert resets */
71 prcm_apb0_enable(PRCM_APB0_GATE_PIO | PRCM_APB0_GATE_UART);
75 int clock_twi_onoff(int port, int state)
77 struct sunxi_ccm_reg *const ccm =
78 (struct sunxi_ccm_reg *)SUNXI_CCM_BASE;
80 /* set the apb clock gate for twi */
82 setbits_le32(&ccm->apb2_gate,
83 CLK_GATE_OPEN << (APB2_GATE_TWI_SHIFT+port));
85 clrbits_le32(&ccm->apb2_gate,
86 CLK_GATE_OPEN << (APB2_GATE_TWI_SHIFT+port));
91 #ifdef CONFIG_SPL_BUILD
92 void clock_set_pll1(unsigned int clk)
94 struct sunxi_ccm_reg * const ccm =
95 (struct sunxi_ccm_reg *)SUNXI_CCM_BASE;
100 if (clk > 1152000000) {
102 } else if (clk > 768000000) {
107 /* Switch to 24MHz clock while changing PLL1 */
108 writel(AXI_DIV_3 << AXI_DIV_SHIFT |
109 ATB_DIV_2 << ATB_DIV_SHIFT |
110 CPU_CLK_SRC_OSC24M << CPU_CLK_SRC_SHIFT,
114 * sun6i: PLL1 rate = ((24000000 * n * k) >> 0) / m (p is ignored)
115 * sun8i: PLL1 rate = ((24000000 * n * k) >> p) / m
117 writel(CCM_PLL1_CTRL_EN | CCM_PLL1_CTRL_P(p) |
118 CCM_PLL1_CTRL_N(clk / (24000000 * k / m)) |
119 CCM_PLL1_CTRL_K(k) | CCM_PLL1_CTRL_M(m), &ccm->pll1_cfg);
122 /* Switch CPU to PLL1 */
123 writel(AXI_DIV_3 << AXI_DIV_SHIFT |
124 ATB_DIV_2 << ATB_DIV_SHIFT |
125 CPU_CLK_SRC_PLL1 << CPU_CLK_SRC_SHIFT,
130 void clock_set_pll3(unsigned int clk)
132 struct sunxi_ccm_reg * const ccm =
133 (struct sunxi_ccm_reg *)SUNXI_CCM_BASE;
134 const int m = 8; /* 3 MHz steps just like sun4i, sun5i and sun7i */
137 clrbits_le32(&ccm->pll3_cfg, CCM_PLL3_CTRL_EN);
141 /* PLL3 rate = 24000000 * n / m */
142 writel(CCM_PLL3_CTRL_EN | CCM_PLL3_CTRL_INTEGER_MODE |
143 CCM_PLL3_CTRL_N(clk / (24000000 / m)) | CCM_PLL3_CTRL_M(m),
147 void clock_set_pll5(unsigned int clk, bool sigma_delta_enable)
149 struct sunxi_ccm_reg * const ccm =
150 (struct sunxi_ccm_reg *)SUNXI_CCM_BASE;
151 const int max_n = 32;
154 if (sigma_delta_enable)
155 writel(CCM_PLL5_PATTERN, &ccm->pll5_pattern_cfg);
157 /* PLL5 rate = 24000000 * n * k / m */
158 if (clk > 24000000 * k * max_n / m) {
160 if (clk > 24000000 * k * max_n / m)
163 writel(CCM_PLL5_CTRL_EN |
164 (sigma_delta_enable ? CCM_PLL5_CTRL_SIGMA_DELTA_EN : 0) |
166 CCM_PLL5_CTRL_N(clk / (24000000 * k / m)) |
167 CCM_PLL5_CTRL_K(k) | CCM_PLL5_CTRL_M(m), &ccm->pll5_cfg);
172 #ifdef CONFIG_MACH_SUN6I
173 void clock_set_mipi_pll(unsigned int clk)
175 struct sunxi_ccm_reg * const ccm =
176 (struct sunxi_ccm_reg *)SUNXI_CCM_BASE;
177 unsigned int k, m, n, value, diff;
178 unsigned best_k = 0, best_m = 0, best_n = 0, best_diff = 0xffffffff;
179 unsigned int src = clock_get_pll3();
181 /* All calculations are in KHz to avoid overflows */
185 /* Pick the closest lower clock */
186 for (k = 1; k <= 4; k++) {
187 for (m = 1; m <= 16; m++) {
188 for (n = 1; n <= 16; n++) {
189 value = src * n * k / m;
194 if (diff < best_diff) {
207 writel(CCM_MIPI_PLL_CTRL_EN | CCM_MIPI_PLL_CTRL_LDO_EN |
208 CCM_MIPI_PLL_CTRL_N(best_n) | CCM_MIPI_PLL_CTRL_K(best_k) |
209 CCM_MIPI_PLL_CTRL_M(best_m), &ccm->mipi_pll_cfg);
213 #ifdef CONFIG_MACH_SUN8I_A33
214 void clock_set_pll11(unsigned int clk, bool sigma_delta_enable)
216 struct sunxi_ccm_reg * const ccm =
217 (struct sunxi_ccm_reg *)SUNXI_CCM_BASE;
219 if (sigma_delta_enable)
220 writel(CCM_PLL11_PATTERN, &ccm->pll5_pattern_cfg);
222 writel(CCM_PLL11_CTRL_EN | CCM_PLL11_CTRL_UPD |
223 (sigma_delta_enable ? CCM_PLL11_CTRL_SIGMA_DELTA_EN : 0) |
224 CCM_PLL11_CTRL_N(clk / 24000000), &ccm->pll11_cfg);
226 while (readl(&ccm->pll11_cfg) & CCM_PLL11_CTRL_UPD)
231 unsigned int clock_get_pll3(void)
233 struct sunxi_ccm_reg *const ccm =
234 (struct sunxi_ccm_reg *)SUNXI_CCM_BASE;
235 uint32_t rval = readl(&ccm->pll3_cfg);
236 int n = ((rval & CCM_PLL3_CTRL_N_MASK) >> CCM_PLL3_CTRL_N_SHIFT) + 1;
237 int m = ((rval & CCM_PLL3_CTRL_M_MASK) >> CCM_PLL3_CTRL_M_SHIFT) + 1;
239 /* Multiply by 1000 after dividing by m to avoid integer overflows */
240 return (24000 * n / m) * 1000;
243 unsigned int clock_get_pll6(void)
245 struct sunxi_ccm_reg *const ccm =
246 (struct sunxi_ccm_reg *)SUNXI_CCM_BASE;
247 uint32_t rval = readl(&ccm->pll6_cfg);
248 int n = ((rval & CCM_PLL6_CTRL_N_MASK) >> CCM_PLL6_CTRL_N_SHIFT) + 1;
249 int k = ((rval & CCM_PLL6_CTRL_K_MASK) >> CCM_PLL6_CTRL_K_SHIFT) + 1;
250 return 24000000 * n * k / 2;
253 unsigned int clock_get_mipi_pll(void)
255 struct sunxi_ccm_reg *const ccm =
256 (struct sunxi_ccm_reg *)SUNXI_CCM_BASE;
257 uint32_t rval = readl(&ccm->mipi_pll_cfg);
258 unsigned int n = ((rval & CCM_MIPI_PLL_CTRL_N_MASK) >> CCM_MIPI_PLL_CTRL_N_SHIFT) + 1;
259 unsigned int k = ((rval & CCM_MIPI_PLL_CTRL_K_MASK) >> CCM_MIPI_PLL_CTRL_K_SHIFT) + 1;
260 unsigned int m = ((rval & CCM_MIPI_PLL_CTRL_M_MASK) >> CCM_MIPI_PLL_CTRL_M_SHIFT) + 1;
261 unsigned int src = clock_get_pll3();
263 /* Multiply by 1000 after dividing by m to avoid integer overflows */
264 return ((src / 1000) * n * k / m) * 1000;
267 void clock_set_de_mod_clock(u32 *clk_cfg, unsigned int hz)
269 int pll = clock_get_pll6() * 2;
272 while ((pll / div) > hz)
275 writel(CCM_DE_CTRL_GATE | CCM_DE_CTRL_PLL6_2X | CCM_DE_CTRL_M(div),