1 // SPDX-License-Identifier: GPL-2.0+
3 * (C) Copyright 2013-2016, Freescale Semiconductor, Inc.
7 #include <clock_legacy.h>
11 #include <asm/arch/imx-regs.h>
12 #include <asm/arch/clock.h>
13 #include <asm/arch/mc_cgm_regs.h>
14 #include <asm/arch/mc_me_regs.h>
15 #include <asm/arch/mc_rgm_regs.h>
22 struct mscm_ir *mscmir = (struct mscm_ir *)MSCM_BASE_ADDR;
23 u32 cpu = readl(&mscmir->cpxtype);
28 DECLARE_GLOBAL_DATA_PTR;
30 static uintptr_t get_pllfreq(u32 pll, u32 refclk_freq, u32 plldv,
31 u32 pllfd, u32 selected_output)
33 u32 vco = 0, plldv_prediv = 0, plldv_mfd = 0, pllfd_mfn = 0;
34 u32 plldv_rfdphi_div = 0, fout = 0;
35 u32 dfs_portn = 0, dfs_mfn = 0, dfs_mfi = 0;
37 if (selected_output > DFS_MAXNUMBER) {
42 (plldv & PLLDIG_PLLDV_PREDIV_MASK) >> PLLDIG_PLLDV_PREDIV_OFFSET;
43 plldv_mfd = (plldv & PLLDIG_PLLDV_MFD_MASK);
45 pllfd_mfn = (pllfd & PLLDIG_PLLFD_MFN_MASK);
47 plldv_prediv = plldv_prediv == 0 ? 1 : plldv_prediv;
49 /* The formula for VCO is from TR manual, rev. D */
50 vco = refclk_freq / plldv_prediv * (plldv_mfd + pllfd_mfn / 20481);
52 if (selected_output != 0) {
53 /* Determine the RFDPHI for PHI1 */
55 (plldv & PLLDIG_PLLDV_RFDPHI1_MASK) >>
56 PLLDIG_PLLDV_RFDPHI1_OFFSET;
57 plldv_rfdphi_div = plldv_rfdphi_div == 0 ? 1 : plldv_rfdphi_div;
58 if (pll == ARM_PLL || pll == ENET_PLL || pll == DDR_PLL) {
60 readl(DFS_DVPORTn(pll, selected_output - 1));
62 (dfs_portn & DFS_DVPORTn_MFI_MASK) >>
63 DFS_DVPORTn_MFI_OFFSET;
65 (dfs_portn & DFS_DVPORTn_MFI_MASK) >>
66 DFS_DVPORTn_MFI_OFFSET;
67 fout = vco / (dfs_mfi + (dfs_mfn / 256));
69 fout = vco / plldv_rfdphi_div;
73 /* Determine the RFDPHI for PHI0 */
75 (plldv & PLLDIG_PLLDV_RFDPHI_MASK) >>
76 PLLDIG_PLLDV_RFDPHI_OFFSET;
77 fout = vco / plldv_rfdphi_div;
84 /* Implemented for ARMPLL, PERIPH_PLL, ENET_PLL, DDR_PLL, VIDEO_LL */
85 static uintptr_t decode_pll(enum pll_type pll, u32 refclk_freq,
90 plldv = readl(PLLDIG_PLLDV(pll));
91 pllfd = readl(PLLDIG_PLLFD(pll));
93 return get_pllfreq(pll, refclk_freq, plldv, pllfd, selected_output);
96 static u32 get_mcu_main_clk(void)
102 sysclk_sel = readl(CGM_SC_SS(MC_CGM1_BASE_ADDR)) & MC_CGM_SC_SEL_MASK;
103 sysclk_sel >>= MC_CGM_SC_SEL_OFFSET;
106 readl(CGM_SC_DCn(MC_CGM1_BASE_ADDR, 0)) & MC_CGM_SC_DCn_PREDIV_MASK;
107 coreclk_div >>= MC_CGM_SC_DCn_PREDIV_OFFSET;
110 switch (sysclk_sel) {
111 case MC_CGM_SC_SEL_FIRC:
112 freq = FIRC_CLK_FREQ;
114 case MC_CGM_SC_SEL_XOSC:
115 freq = XOSC_CLK_FREQ;
117 case MC_CGM_SC_SEL_ARMPLL:
118 /* ARMPLL has as source XOSC and CORE_CLK has as input PHI0 */
119 freq = decode_pll(ARM_PLL, XOSC_CLK_FREQ, 0);
121 case MC_CGM_SC_SEL_CLKDISABLE:
122 printf("Sysclk is disabled\n");
125 printf("unsupported system clock select\n");
128 return freq / coreclk_div;
131 static u32 get_sys_clk(u32 number)
133 u32 sysclk_div, sysclk_div_number;
139 sysclk_div_number = 0;
142 sysclk_div_number = 1;
145 printf("unsupported system clock \n");
148 sysclk_sel = readl(CGM_SC_SS(MC_CGM0_BASE_ADDR)) & MC_CGM_SC_SEL_MASK;
149 sysclk_sel >>= MC_CGM_SC_SEL_OFFSET;
152 readl(CGM_SC_DCn(MC_CGM1_BASE_ADDR, sysclk_div_number)) &
153 MC_CGM_SC_DCn_PREDIV_MASK;
154 sysclk_div >>= MC_CGM_SC_DCn_PREDIV_OFFSET;
157 switch (sysclk_sel) {
158 case MC_CGM_SC_SEL_FIRC:
159 freq = FIRC_CLK_FREQ;
161 case MC_CGM_SC_SEL_XOSC:
162 freq = XOSC_CLK_FREQ;
164 case MC_CGM_SC_SEL_ARMPLL:
165 /* ARMPLL has as source XOSC and SYSn_CLK has as input DFS1 */
166 freq = decode_pll(ARM_PLL, XOSC_CLK_FREQ, 1);
168 case MC_CGM_SC_SEL_CLKDISABLE:
169 printf("Sysclk is disabled\n");
172 printf("unsupported system clock select\n");
175 return freq / sysclk_div;
178 static u32 get_peripherals_clk(void)
184 readl(CGM_ACn_DCm(MC_CGM0_BASE_ADDR, 5, 0)) &
185 MC_CGM_ACn_DCm_PREDIV_MASK;
186 aux5clk_div >>= MC_CGM_ACn_DCm_PREDIV_OFFSET;
189 freq = decode_pll(PERIPH_PLL, XOSC_CLK_FREQ, 0);
191 return freq / aux5clk_div;
195 static u32 get_uart_clk(void)
197 u32 auxclk3_div, auxclk3_sel, freq = 0;
200 readl(CGM_ACn_SS(MC_CGM0_BASE_ADDR, 3)) & MC_CGM_ACn_SEL_MASK;
201 auxclk3_sel >>= MC_CGM_ACn_SEL_OFFSET;
204 readl(CGM_ACn_DCm(MC_CGM0_BASE_ADDR, 3, 0)) &
205 MC_CGM_ACn_DCm_PREDIV_MASK;
206 auxclk3_div >>= MC_CGM_ACn_DCm_PREDIV_OFFSET;
209 switch (auxclk3_sel) {
210 case MC_CGM_ACn_SEL_FIRC:
211 freq = FIRC_CLK_FREQ;
213 case MC_CGM_ACn_SEL_XOSC:
214 freq = XOSC_CLK_FREQ;
216 case MC_CGM_ACn_SEL_PERPLLDIVX:
217 freq = get_peripherals_clk() / 3;
219 case MC_CGM_ACn_SEL_SYSCLK:
220 freq = get_sys_clk(6);
223 printf("unsupported system clock select\n");
226 return freq / auxclk3_div;
229 static u32 get_fec_clk(void)
235 readl(CGM_ACn_DCm(MC_CGM0_BASE_ADDR, 2, 0)) &
236 MC_CGM_ACn_DCm_PREDIV_MASK;
237 aux2clk_div >>= MC_CGM_ACn_DCm_PREDIV_OFFSET;
240 freq = decode_pll(ENET_PLL, XOSC_CLK_FREQ, 0);
242 return freq / aux2clk_div;
245 static u32 get_usdhc_clk(void)
251 readl(CGM_ACn_DCm(MC_CGM0_BASE_ADDR, 15, 0)) &
252 MC_CGM_ACn_DCm_PREDIV_MASK;
253 aux15clk_div >>= MC_CGM_ACn_DCm_PREDIV_OFFSET;
256 freq = decode_pll(ENET_PLL, XOSC_CLK_FREQ, 4);
258 return freq / aux15clk_div;
261 static u32 get_i2c_clk(void)
263 return get_peripherals_clk();
266 /* return clocks in Hz */
267 unsigned int mxc_get_clock(enum mxc_clock clk)
271 return get_mcu_main_clk();
272 case MXC_PERIPHERALS_CLK:
273 return get_peripherals_clk();
275 return get_uart_clk();
277 return get_fec_clk();
279 return get_i2c_clk();
281 return get_usdhc_clk();
285 printf("Error: Unsupported function to read the frequency! \
286 Please define it correctly!");
290 /* Not yet implemented - int soc_clk_dump(); */
292 #if defined(CONFIG_DISPLAY_CPUINFO)
293 static char *get_reset_cause(void)
295 u32 cause = readl(MC_RGM_BASE_ADDR + 0x300);
303 return "FCCU soft reaction";
305 return "FCCU hard reaction";
307 return "Software Functional reset";
309 return "Self Test done reset";
311 return "External reset";
313 return "unknown reset";
318 #define SRC_SCR_SW_RST (1<<12)
320 void reset_cpu(ulong addr)
322 printf("Feature not supported.\n");
325 int print_cpuinfo(void)
327 printf("CPU: Freescale Treerunner S32V234 at %d MHz\n",
328 mxc_get_clock(MXC_ARM_CLK) / 1000000);
329 printf("Reset cause: %s\n", get_reset_cause());
335 int cpu_eth_init(bd_t * bis)
339 #if defined(CONFIG_FEC_MXC)
340 rc = fecmxc_initialize(bis);
348 #ifdef CONFIG_FSL_ESDHC_IMX
349 gd->arch.sdhc_clk = mxc_get_clock(MXC_USDHC_CLK);