2 * Copyright (C) 2004 Texas Instruments.
3 * Copyright (C) 2009 David Brownell
5 * See file CREDITS for list of people who contributed to this
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
25 #include <asm/arch/hardware.h>
28 /* offsets from PLL controller base */
29 #define PLLC_PLLCTL 0x100
30 #define PLLC_PLLM 0x110
31 #define PLLC_PREDIV 0x114
32 #define PLLC_PLLDIV1 0x118
33 #define PLLC_PLLDIV2 0x11c
34 #define PLLC_PLLDIV3 0x120
35 #define PLLC_POSTDIV 0x128
36 #define PLLC_BPDIV 0x12c
37 #define PLLC_PLLDIV4 0x160
38 #define PLLC_PLLDIV5 0x164
39 #define PLLC_PLLDIV6 0x168
40 #define PLLC_PLLDIV8 0x170
41 #define PLLC_PLLDIV9 0x174
43 #define BIT(x) (1 << (x))
45 /* SOC-specific pll info */
46 #ifdef CONFIG_SOC_DM355
47 #define ARM_PLLDIV PLLC_PLLDIV1
48 #define DDR_PLLDIV PLLC_PLLDIV1
51 #ifdef CONFIG_SOC_DM644X
52 #define ARM_PLLDIV PLLC_PLLDIV2
53 #define DSP_PLLDIV PLLC_PLLDIV1
54 #define DDR_PLLDIV PLLC_PLLDIV2
57 #ifdef CONFIG_SOC_DM6447
58 #define ARM_PLLDIV PLLC_PLLDIV2
59 #define DSP_PLLDIV PLLC_PLLDIV1
60 #define DDR_PLLDIV PLLC_PLLDIV1
63 #ifdef CONFIG_SOC_DM646X
64 #define DSP_PLLDIV PLLC_PLLDIV1
65 #define ARM_PLLDIV PLLC_PLLDIV2
66 #define DDR_PLLDIV PLLC_PLLDIV1
69 #ifdef CONFIG_SOC_DA8XX
70 const dv_reg * const sysdiv[7] = {
71 &davinci_pllc_regs->plldiv1, &davinci_pllc_regs->plldiv2,
72 &davinci_pllc_regs->plldiv3, &davinci_pllc_regs->plldiv4,
73 &davinci_pllc_regs->plldiv5, &davinci_pllc_regs->plldiv6,
74 &davinci_pllc_regs->plldiv7
77 int clk_get(enum davinci_clk_ids id)
84 pll_out = CONFIG_SYS_OSCIN_FREQ;
86 if (id == DAVINCI_AUXCLK_CLKID)
90 * Lets keep this simple. Combining operations can result in
91 * unexpected approximations
93 pre_div = (readl(&davinci_pllc_regs->prediv) &
94 DAVINCI_PLLC_DIV_MASK) + 1;
95 pllm = readl(&davinci_pllc_regs->pllm) + 1;
100 if (id == DAVINCI_PLLM_CLKID)
103 post_div = (readl(&davinci_pllc_regs->postdiv) &
104 DAVINCI_PLLC_DIV_MASK) + 1;
108 if (id == DAVINCI_PLLC_CLKID)
111 pll_out /= (readl(sysdiv[id - 1]) & DAVINCI_PLLC_DIV_MASK) + 1;
116 #endif /* CONFIG_SOC_DA8XX */
118 #ifdef CONFIG_DISPLAY_CPUINFO
120 static unsigned pll_div(volatile void *pllbase, unsigned offset)
124 div = REG(pllbase + offset);
125 return (div & BIT(15)) ? (1 + (div & 0x1f)) : 1;
128 static inline unsigned pll_prediv(volatile void *pllbase)
130 #ifdef CONFIG_SOC_DM355
131 /* this register read seems to fail on pll0 */
132 if (pllbase == (volatile void *)DAVINCI_PLL_CNTRL0_BASE)
135 return pll_div(pllbase, PLLC_PREDIV);
140 static inline unsigned pll_postdiv(volatile void *pllbase)
142 #ifdef CONFIG_SOC_DM355
143 return pll_div(pllbase, PLLC_POSTDIV);
144 #elif defined(CONFIG_SOC_DM6446)
145 if (pllbase == (volatile void *)DAVINCI_PLL_CNTRL0_BASE)
146 return pll_div(pllbase, PLLC_POSTDIV);
151 static unsigned pll_sysclk_mhz(unsigned pll_addr, unsigned div)
153 volatile void *pllbase = (volatile void *) pll_addr;
154 #ifdef CONFIG_SOC_DM646X
155 unsigned base = CFG_REFCLK_FREQ / 1000;
157 unsigned base = CONFIG_SYS_HZ_CLOCK / 1000;
160 /* the PLL might be bypassed */
161 if (REG(pllbase + PLLC_PLLCTL) & BIT(0)) {
162 base /= pll_prediv(pllbase);
163 base *= 1 + (REG(pllbase + PLLC_PLLM) & 0x0ff);
164 base /= pll_postdiv(pllbase);
166 return DIV_ROUND_UP(base, 1000 * pll_div(pllbase, div));
169 int print_cpuinfo(void)
171 /* REVISIT fetch and display CPU ID and revision information
172 * too ... that will matter as more revisions appear.
174 printf("Cores: ARM %d MHz",
175 pll_sysclk_mhz(DAVINCI_PLL_CNTRL0_BASE, ARM_PLLDIV));
178 printf(", DSP %d MHz",
179 pll_sysclk_mhz(DAVINCI_PLL_CNTRL0_BASE, DSP_PLLDIV));
182 printf("\nDDR: %d MHz\n",
183 /* DDR PHY uses an x2 input clock */
184 pll_sysclk_mhz(DAVINCI_PLL_CNTRL1_BASE, DDR_PLLDIV)
189 #ifdef DAVINCI_DM6467EVM
190 unsigned int davinci_arm_clk_get()
192 return pll_sysclk_mhz(DAVINCI_PLL_CNTRL0_BASE, ARM_PLLDIV) * 1000000;
198 * Initializes on-chip ethernet controllers.
199 * to override, implement board_eth_init()
201 int cpu_eth_init(bd_t *bis)
203 #if defined(CONFIG_DRIVER_TI_EMAC)
204 davinci_emac_initialize();