1 // SPDX-License-Identifier: GPL-2.0+
4 * Copyright (C) 2004-2007, 2012 Freescale Semiconductor, Inc.
5 * TsiChung Liew (Tsi-Chung.Liew@freescale.com)
9 #include <clock_legacy.h>
10 #include <asm/processor.h>
12 #include <asm/immap.h>
15 DECLARE_GLOBAL_DATA_PTR;
18 * Low Power Divider specifications
20 #define CLOCK_LPD_MIN (1 << 0) /* Divider (decoded) */
21 #define CLOCK_LPD_MAX (1 << 15) /* Divider (decoded) */
23 #define CLOCK_PLL_FVCO_MAX 540000000
24 #define CLOCK_PLL_FVCO_MIN 300000000
26 #define CLOCK_PLL_FSYS_MAX 266666666
27 #define CLOCK_PLL_FSYS_MIN 100000000
30 void clock_enter_limp(int lpdiv)
32 ccm_t *ccm = (ccm_t *)MMAP_CCM;
35 /* Check bounds of divider */
36 if (lpdiv < CLOCK_LPD_MIN)
37 lpdiv = CLOCK_LPD_MIN;
38 if (lpdiv > CLOCK_LPD_MAX)
39 lpdiv = CLOCK_LPD_MAX;
41 /* Round divider down to nearest power of two */
42 for (i = 0, j = lpdiv; j != 1; j >>= 1, i++) ;
44 #ifdef CONFIG_MCF5445x
45 /* Apply the divider to the system clock */
46 clrsetbits_be16(&ccm->cdr, 0x0f00, CCM_CDR_LPDIV(i));
49 /* Enable Limp Mode */
50 setbits_be16(&ccm->misccr, CCM_MISCCR_LIMP);
54 * brief Exit Limp mode
55 * warning The PLL should be set and locked prior to exiting Limp mode
57 void clock_exit_limp(void)
59 ccm_t *ccm = (ccm_t *)MMAP_CCM;
60 pll_t *pll = (pll_t *)MMAP_PLL;
63 clrbits_be16(&ccm->misccr, CCM_MISCCR_LIMP);
65 /* Wait for the PLL to lock */
66 while (!(in_be32(&pll->psr) & PLL_PSR_LOCK))
70 #ifdef CONFIG_MCF5441x
71 void setup_5441x_clocks(void)
73 ccm_t *ccm = (ccm_t *)MMAP_CCM;
74 pll_t *pll = (pll_t *)MMAP_PLL;
75 int temp, vco = 0, bootmod_ccr, pdr;
77 bootmod_ccr = (in_be16(&ccm->ccr) & CCM_CCR_BOOTMOD) >> 14;
79 switch (bootmod_ccr) {
81 out_be32(&pll->pcr, 0x00000013);
82 out_be32(&pll->pdr, 0x00e70c61);
91 /*Change frequency for Modelo SER1 USB host*/
92 #ifdef CONFIG_LOW_MCFCLK
93 temp = in_be32(&pll->pcr);
96 out_be32(&pll->pcr, temp);
98 temp = in_be32(&pll->pdr);
101 out_be32(&pll->pdr, temp);
105 setbits_be16(&ccm->misccr2, 0x02);
107 vco = ((in_be32(&pll->pcr) & PLL_CR_FBKDIV_BITS) + 1) *
108 CONFIG_SYS_INPUT_CLKSRC;
109 gd->arch.vco_clk = vco;
111 gd->arch.inp_clk = CONFIG_SYS_INPUT_CLKSRC; /* Input clock */
113 pdr = in_be32(&pll->pdr);
114 temp = (pdr & PLL_DR_OUTDIV1_BITS) + 1;
115 gd->cpu_clk = vco / temp; /* cpu clock */
116 gd->arch.flb_clk = vco / temp; /* FlexBus clock */
117 gd->arch.flb_clk >>= 1;
118 if (in_be16(&ccm->misccr2) & 2) /* fsys/4 */
119 gd->arch.flb_clk >>= 1;
121 temp = ((pdr & PLL_DR_OUTDIV2_BITS) >> 5) + 1;
122 gd->bus_clk = vco / temp; /* bus clock */
124 temp = ((pdr & PLL_DR_OUTDIV3_BITS) >> 10) + 1;
125 gd->arch.sdhc_clk = vco / temp;
129 #ifdef CONFIG_MCF5445x
130 void setup_5445x_clocks(void)
132 ccm_t *ccm = (ccm_t *)MMAP_CCM;
133 pll_t *pll = (pll_t *)MMAP_PLL;
134 int pllmult_nopci[] = { 20, 10, 24, 18, 12, 6, 16, 8 };
135 int pllmult_pci[] = { 12, 6, 16, 8 };
136 int vco = 0, temp, fbtemp, pcrvalue;
137 int *pPllmult = NULL;
143 #ifdef CONFIG_M54455EVB
144 u8 *cpld = (u8 *)(CONFIG_SYS_CS2_BASE + 3);
148 /* To determine PCI is present or not */
149 if (((in_be16(&ccm->ccr) & CCM_CCR_360_FBCONFIG_MASK) == 0x00e0) ||
150 ((in_be16(&ccm->ccr) & CCM_CCR_360_FBCONFIG_MASK) == 0x0060)) {
151 pPllmult = &pllmult_pci[0];
152 fbpll_mask = 3; /* 11b */
157 pPllmult = &pllmult_nopci[0];
158 fbpll_mask = 7; /* 111b */
165 #ifdef CONFIG_M54455EVB
166 bootmode = (in_8(cpld) & 0x03);
169 /* Temporary read from CCR- fixed fb issue, must be the same clock
170 as pci or input clock, causing cpld/fpga read inconsistancy */
171 fbtemp = pPllmult[ccm->ccr & fbpll_mask];
173 /* Break down into small pieces, code still in flex bus */
174 pcrvalue = in_be32(&pll->pcr) & 0xFFFFF0FF;
176 pcrvalue |= PLL_PCR_OUTDIV3(temp);
178 out_be32(&pll->pcr, pcrvalue);
181 #ifdef CONFIG_M54451EVB
182 /* No external logic to read the bootmode, hard coded from built */
188 /* default value is 16 mul, set to 20 mul */
189 pcrvalue = (in_be32(&pll->pcr) & 0x00FFFFFF) | 0x14000000;
190 out_be32(&pll->pcr, pcrvalue);
191 while ((in_be32(&pll->psr) & PLL_PSR_LOCK) != PLL_PSR_LOCK)
198 vco = pPllmult[ccm->rcon & fbpll_mask] * CONFIG_SYS_INPUT_CLKSRC;
200 if ((vco < CLOCK_PLL_FVCO_MIN) || (vco > CLOCK_PLL_FVCO_MAX)) {
201 /* invaild range, re-set in PCR */
202 int temp = ((in_be32(&pll->pcr) & PLL_PCR_OUTDIV2_MASK) >> 4) + 1;
205 j = (in_be32(&pll->pcr) & 0xFF000000) >> 24;
206 for (i = j; i < 0xFF; i++) {
207 vco = i * CONFIG_SYS_INPUT_CLKSRC;
208 if (vco >= CLOCK_PLL_FVCO_MIN) {
210 if (bus <= CLOCK_PLL_FSYS_MIN - MHZ)
216 pcrvalue = in_be32(&pll->pcr) & 0x00FF00FF;
217 fbtemp = ((i - 1) << 8) | ((i - 1) << 12);
218 pcrvalue |= ((i << 24) | fbtemp);
220 out_be32(&pll->pcr, pcrvalue);
222 gd->arch.vco_clk = vco; /* Vco clock */
223 } else if (bootmode == 2) {
225 vco = ((in_be32(&pll->pcr) & 0xFF000000) >> 24) * CONFIG_SYS_INPUT_CLKSRC;
226 if ((vco < CLOCK_PLL_FVCO_MIN) || (vco > CLOCK_PLL_FVCO_MAX)) {
228 pcrvalue = (in_be32(&pll->pcr) & 0x00FFFFFF);
229 pcrvalue |= pPllmult[in_be16(&ccm->ccr) & fbpll_mask] << 24;
230 out_be32(&pll->pcr, pcrvalue);
231 vco = ((in_be32(&pll->pcr) & 0xFF000000) >> 24) * CONFIG_SYS_INPUT_CLKSRC;
233 gd->arch.vco_clk = vco; /* Vco clock */
234 } else if (bootmode == 3) {
236 vco = ((in_be32(&pll->pcr) & 0xFF000000) >> 24) * CONFIG_SYS_INPUT_CLKSRC;
237 gd->arch.vco_clk = vco; /* Vco clock */
240 if ((in_be16(&ccm->ccr) & CCM_MISCCR_LIMP) == CCM_MISCCR_LIMP) {
243 gd->arch.inp_clk = CONFIG_SYS_INPUT_CLKSRC; /* Input clock */
245 temp = (in_be32(&pll->pcr) & PLL_PCR_OUTDIV1_MASK) + 1;
246 gd->cpu_clk = vco / temp; /* cpu clock */
248 temp = ((in_be32(&pll->pcr) & PLL_PCR_OUTDIV2_MASK) >> 4) + 1;
249 gd->bus_clk = vco / temp; /* bus clock */
251 temp = ((in_be32(&pll->pcr) & PLL_PCR_OUTDIV3_MASK) >> 8) + 1;
252 gd->arch.flb_clk = vco / temp; /* FlexBus clock */
256 temp = ((in_be32(&pll->pcr) & PLL_PCR_OUTDIV4_MASK) >> 12) + 1;
257 gd->pci_clk = vco / temp; /* PCI clock */
262 #ifdef CONFIG_SYS_I2C_FSL
263 gd->arch.i2c1_clk = gd->bus_clk;
268 /* get_clocks() fills in gd->cpu_clock and gd->bus_clk */
271 #ifdef CONFIG_MCF5441x
272 setup_5441x_clocks();
274 #ifdef CONFIG_MCF5445x
275 setup_5445x_clocks();
278 #ifdef CONFIG_SYS_FSL_I2C
279 gd->arch.i2c1_clk = gd->bus_clk;