1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3 * clock_am43xx.c
4 *
5 * clocks for AM43XX based boards
6 * Derived from AM33XX based boards
7 *
8 * Copyright (C) 2013, Texas Instruments, Incorporated - http://www.ti.com/
9 */
10
11 #include <common.h>
12 #include <asm/arch/cpu.h>
13 #include <asm/arch/clock.h>
14 #include <asm/arch/hardware.h>
15 #include <asm/arch/sys_proto.h>
16 #include <asm/io.h>
17
18 struct cm_perpll *const cmper = (struct cm_perpll *)CM_PER;
19 struct cm_wkuppll *const cmwkup = (struct cm_wkuppll *)CM_WKUP;
20 struct cm_dpll *const cmdpll = (struct cm_dpll *)CM_DPLL;
21
22 const struct dpll_regs dpll_mpu_regs = {
23 .cm_clkmode_dpll = CM_WKUP + 0x560,
24 .cm_idlest_dpll = CM_WKUP + 0x564,
25 .cm_clksel_dpll = CM_WKUP + 0x56c,
26 .cm_div_m2_dpll = CM_WKUP + 0x570,
27 };
28
29 const struct dpll_regs dpll_core_regs = {
30 .cm_clkmode_dpll = CM_WKUP + 0x520,
31 .cm_idlest_dpll = CM_WKUP + 0x524,
32 .cm_clksel_dpll = CM_WKUP + 0x52C,
33 .cm_div_m4_dpll = CM_WKUP + 0x538,
34 .cm_div_m5_dpll = CM_WKUP + 0x53C,
35 .cm_div_m6_dpll = CM_WKUP + 0x540,
36 };
37
38 const struct dpll_regs dpll_per_regs = {
39 .cm_clkmode_dpll = CM_WKUP + 0x5E0,
40 .cm_idlest_dpll = CM_WKUP + 0x5E4,
41 .cm_clksel_dpll = CM_WKUP + 0x5EC,
42 .cm_div_m2_dpll = CM_WKUP + 0x5F0,
43 };
44
45 const struct dpll_regs dpll_ddr_regs = {
46 .cm_clkmode_dpll = CM_WKUP + 0x5A0,
47 .cm_idlest_dpll = CM_WKUP + 0x5A4,
48 .cm_clksel_dpll = CM_WKUP + 0x5AC,
49 .cm_div_m2_dpll = CM_WKUP + 0x5B0,
50 .cm_div_m4_dpll = CM_WKUP + 0x5B8,
51 };
52
setup_clocks_for_console(void)53 void setup_clocks_for_console(void)
54 {
55 u32 clkctrl, idlest = MODULE_CLKCTRL_IDLEST_DISABLED;
56
57 /* Do not add any spl_debug prints in this function */
58 clrsetbits_le32(&cmwkup->wkclkstctrl, CD_CLKCTRL_CLKTRCTRL_MASK,
59 CD_CLKCTRL_CLKTRCTRL_SW_WKUP <<
60 CD_CLKCTRL_CLKTRCTRL_SHIFT);
61
62 /* Enable UART0 */
63 clrsetbits_le32(&cmwkup->wkup_uart0ctrl,
64 MODULE_CLKCTRL_MODULEMODE_MASK,
65 MODULE_CLKCTRL_MODULEMODE_SW_EXPLICIT_EN <<
66 MODULE_CLKCTRL_MODULEMODE_SHIFT);
67
68 while ((idlest == MODULE_CLKCTRL_IDLEST_DISABLED) ||
69 (idlest == MODULE_CLKCTRL_IDLEST_TRANSITIONING)) {
70 clkctrl = readl(&cmwkup->wkup_uart0ctrl);
71 idlest = (clkctrl & MODULE_CLKCTRL_IDLEST_MASK) >>
72 MODULE_CLKCTRL_IDLEST_SHIFT;
73 }
74 }
75
enable_basic_clocks(void)76 void enable_basic_clocks(void)
77 {
78 u32 *const clk_domains[] = {
79 &cmper->l3clkstctrl,
80 &cmper->l3sclkstctrl,
81 &cmper->l4lsclkstctrl,
82 &cmwkup->wkclkstctrl,
83 &cmper->emifclkstctrl,
84 0
85 };
86
87 u32 *const clk_modules_explicit_en[] = {
88 &cmper->l3clkctrl,
89 &cmper->l4lsclkctrl,
90 &cmper->l4fwclkctrl,
91 &cmwkup->wkl4wkclkctrl,
92 &cmper->l3instrclkctrl,
93 &cmper->l4hsclkctrl,
94 &cmwkup->wkgpio0clkctrl,
95 &cmwkup->wkctrlclkctrl,
96 &cmper->timer2clkctrl,
97 &cmper->gpmcclkctrl,
98 &cmper->elmclkctrl,
99 &cmper->mmc0clkctrl,
100 &cmper->mmc1clkctrl,
101 &cmwkup->wkup_i2c0ctrl,
102 &cmper->gpio1clkctrl,
103 &cmper->gpio2clkctrl,
104 &cmper->gpio3clkctrl,
105 &cmper->gpio4clkctrl,
106 &cmper->gpio5clkctrl,
107 &cmper->i2c1clkctrl,
108 &cmper->cpgmac0clkctrl,
109 &cmper->emiffwclkctrl,
110 &cmper->emifclkctrl,
111 &cmper->otfaemifclkctrl,
112 &cmper->qspiclkctrl,
113 &cmper->spi0clkctrl,
114 0
115 };
116
117 do_enable_clocks(clk_domains, clk_modules_explicit_en, 1);
118
119 /* Select the Master osc clk as Timer2 clock source */
120 writel(0x1, &cmdpll->clktimer2clk);
121
122 /* For OPP100 the mac clock should be /5. */
123 writel(0x4, &cmdpll->clkselmacclk);
124 }
125
rtc_only_enable_basic_clocks(void)126 void rtc_only_enable_basic_clocks(void)
127 {
128 u32 *const clk_domains[] = {
129 &cmper->emifclkstctrl,
130 0
131 };
132
133 u32 *const clk_modules_explicit_en[] = {
134 &cmper->gpio5clkctrl,
135 &cmper->emiffwclkctrl,
136 &cmper->emifclkctrl,
137 &cmper->otfaemifclkctrl,
138 0
139 };
140
141 do_enable_clocks(clk_domains, clk_modules_explicit_en, 1);
142
143 /* Select the Master osc clk as Timer2 clock source */
144 writel(0x1, &cmdpll->clktimer2clk);
145 }
146
147 #ifdef CONFIG_TI_EDMA3
enable_edma3_clocks(void)148 void enable_edma3_clocks(void)
149 {
150 u32 *const clk_domains_edma3[] = {
151 0
152 };
153
154 u32 *const clk_modules_explicit_en_edma3[] = {
155 &cmper->tpccclkctrl,
156 &cmper->tptc0clkctrl,
157 0
158 };
159
160 do_enable_clocks(clk_domains_edma3,
161 clk_modules_explicit_en_edma3,
162 1);
163 }
164
disable_edma3_clocks(void)165 void disable_edma3_clocks(void)
166 {
167 u32 *const clk_domains_edma3[] = {
168 0
169 };
170
171 u32 *const clk_modules_disable_edma3[] = {
172 &cmper->tpccclkctrl,
173 &cmper->tptc0clkctrl,
174 0
175 };
176
177 do_disable_clocks(clk_domains_edma3,
178 clk_modules_disable_edma3,
179 1);
180 }
181 #endif
182
183 #if defined(CONFIG_USB_DWC3) || defined(CONFIG_USB_XHCI_OMAP)
enable_usb_clocks(int index)184 void enable_usb_clocks(int index)
185 {
186 u32 *usbclkctrl = 0;
187 u32 *usbphyocp2scpclkctrl = 0;
188
189 if (index == 0) {
190 usbclkctrl = &cmper->usb0clkctrl;
191 usbphyocp2scpclkctrl = &cmper->usbphyocp2scp0clkctrl;
192 setbits_le32(&cmper->usb0clkctrl,
193 USBOTGSSX_CLKCTRL_OPTFCLKEN_REFCLK960);
194 setbits_le32(&cmwkup->usbphy0clkctrl,
195 USBPHY0_CLKCTRL_OPTFCLKEN_CLK32K);
196 } else if (index == 1) {
197 usbclkctrl = &cmper->usb1clkctrl;
198 usbphyocp2scpclkctrl = &cmper->usbphyocp2scp1clkctrl;
199 setbits_le32(&cmper->usb1clkctrl,
200 USBOTGSSX_CLKCTRL_OPTFCLKEN_REFCLK960);
201 setbits_le32(&cmwkup->usbphy1clkctrl,
202 USBPHY0_CLKCTRL_OPTFCLKEN_CLK32K);
203 }
204
205 u32 *const clk_domains_usb[] = {
206 0
207 };
208
209 u32 *const clk_modules_explicit_en_usb[] = {
210 usbclkctrl,
211 usbphyocp2scpclkctrl,
212 0
213 };
214
215 do_enable_clocks(clk_domains_usb, clk_modules_explicit_en_usb, 1);
216 }
217
disable_usb_clocks(int index)218 void disable_usb_clocks(int index)
219 {
220 u32 *usbclkctrl = 0;
221 u32 *usbphyocp2scpclkctrl = 0;
222
223 if (index == 0) {
224 usbclkctrl = &cmper->usb0clkctrl;
225 usbphyocp2scpclkctrl = &cmper->usbphyocp2scp0clkctrl;
226 clrbits_le32(&cmper->usb0clkctrl,
227 USBOTGSSX_CLKCTRL_OPTFCLKEN_REFCLK960);
228 clrbits_le32(&cmwkup->usbphy0clkctrl,
229 USBPHY0_CLKCTRL_OPTFCLKEN_CLK32K);
230 } else if (index == 1) {
231 usbclkctrl = &cmper->usb1clkctrl;
232 usbphyocp2scpclkctrl = &cmper->usbphyocp2scp1clkctrl;
233 clrbits_le32(&cmper->usb1clkctrl,
234 USBOTGSSX_CLKCTRL_OPTFCLKEN_REFCLK960);
235 clrbits_le32(&cmwkup->usbphy1clkctrl,
236 USBPHY0_CLKCTRL_OPTFCLKEN_CLK32K);
237 }
238
239 u32 *const clk_domains_usb[] = {
240 0
241 };
242
243 u32 *const clk_modules_disable_usb[] = {
244 usbclkctrl,
245 usbphyocp2scpclkctrl,
246 0
247 };
248
249 do_disable_clocks(clk_domains_usb, clk_modules_disable_usb, 1);
250 }
251 #endif
252