3 * Sascha Hauer, Pengutronix
5 * (C) Copyright 2009-2010 Freescale Semiconductor, Inc.
7 * See file CREDITS for list of people who contributed to this
10 * This program is free software; you can redistribute it and/or
11 * modify it under the terms of the GNU General Public License as
12 * published by the Free Software Foundation; either version 2 of
13 * the License, or (at your option) any later version.
15 * This program is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 * GNU General Public License for more details.
20 * You should have received a copy of the GNU General Public License
21 * along with this program; if not, write to the Free Software
22 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
27 #include <asm/arch/mx51.h>
28 #include <asm/errno.h>
29 #ifdef CONFIG_ARCH_CPU_INIT
30 #include <asm/cache-cp15.h>
35 PLL1_CLK = MXC_DPLL1_BASE,
36 PLL2_CLK = MXC_DPLL2_BASE,
37 PLL3_CLK = MXC_DPLL3_BASE,
46 static u32 __decode_pll(enum pll_clocks pll, u32 infreq)
48 u32 mfi, mfn, mfd, pd;
50 mfn = __REG(pll + MXC_PLL_DP_MFN);
51 mfd = __REG(pll + MXC_PLL_DP_MFD) + 1;
52 mfi = __REG(pll + MXC_PLL_DP_OP);
54 mfi = (mfi >> 4) & 0xF;
55 mfi = (mfi >= 5) ? mfi : 5;
57 return ((4 * (infreq / 1000) * (mfi * mfd + mfn)) / (mfd * pd)) * 1000;
60 static u32 __get_mcu_main_clk(void)
63 reg = (__REG(MXC_CCM_CACRR) & MXC_CCM_CACRR_ARM_PODF_MASK) >>
64 MXC_CCM_CACRR_ARM_PODF_OFFSET;
65 freq = __decode_pll(PLL1_CLK, CONFIG_MX51_HCLK_FREQ);
66 return freq / (reg + 1);
69 static u32 __get_periph_clk(void)
72 reg = __REG(MXC_CCM_CBCDR);
73 if (reg & MXC_CCM_CBCDR_PERIPH_CLK_SEL) {
74 reg = __REG(MXC_CCM_CBCMR);
75 switch ((reg & MXC_CCM_CBCMR_PERIPH_CLK_SEL_MASK) >>
76 MXC_CCM_CBCMR_PERIPH_CLK_SEL_OFFSET) {
78 return __decode_pll(PLL1_CLK, CONFIG_MX51_HCLK_FREQ);
80 return __decode_pll(PLL3_CLK, CONFIG_MX51_HCLK_FREQ);
85 return __decode_pll(PLL2_CLK, CONFIG_MX51_HCLK_FREQ);
88 static u32 __get_ipg_clk(void)
90 u32 ahb_podf, ipg_podf;
92 ahb_podf = __REG(MXC_CCM_CBCDR);
93 ipg_podf = (ahb_podf & MXC_CCM_CBCDR_IPG_PODF_MASK) >>
94 MXC_CCM_CBCDR_IPG_PODF_OFFSET;
95 ahb_podf = (ahb_podf & MXC_CCM_CBCDR_AHB_PODF_MASK) >>
96 MXC_CCM_CBCDR_AHB_PODF_OFFSET;
97 return __get_periph_clk() / ((ahb_podf + 1) * (ipg_podf + 1));
100 static u32 __get_ipg_per_clk(void)
102 u32 pred1, pred2, podf;
103 if (__REG(MXC_CCM_CBCMR) & MXC_CCM_CBCMR_PERCLK_IPG_CLK_SEL)
104 return __get_ipg_clk();
105 /* Fixme: not handle what about lpm*/
106 podf = __REG(MXC_CCM_CBCDR);
107 pred1 = (podf & MXC_CCM_CBCDR_PERCLK_PRED1_MASK) >>
108 MXC_CCM_CBCDR_PERCLK_PRED1_OFFSET;
109 pred2 = (podf & MXC_CCM_CBCDR_PERCLK_PRED2_MASK) >>
110 MXC_CCM_CBCDR_PERCLK_PRED2_OFFSET;
111 podf = (podf & MXC_CCM_CBCDR_PERCLK_PODF_MASK) >>
112 MXC_CCM_CBCDR_PERCLK_PODF_OFFSET;
114 return __get_periph_clk() / ((pred1 + 1) * (pred2 + 1) * (podf + 1));
117 static u32 __get_uart_clk(void)
119 unsigned int freq, reg, pred, podf;
120 reg = __REG(MXC_CCM_CSCMR1);
121 switch ((reg & MXC_CCM_CSCMR1_UART_CLK_SEL_MASK) >>
122 MXC_CCM_CSCMR1_UART_CLK_SEL_OFFSET) {
124 freq = __decode_pll(PLL1_CLK, CONFIG_MX51_HCLK_FREQ);
127 freq = __decode_pll(PLL2_CLK, CONFIG_MX51_HCLK_FREQ);
130 freq = __decode_pll(PLL3_CLK, CONFIG_MX51_HCLK_FREQ);
136 reg = __REG(MXC_CCM_CSCDR1);
138 pred = (reg & MXC_CCM_CSCDR1_UART_CLK_PRED_MASK) >>
139 MXC_CCM_CSCDR1_UART_CLK_PRED_OFFSET;
141 podf = (reg & MXC_CCM_CSCDR1_UART_CLK_PODF_MASK) >>
142 MXC_CCM_CSCDR1_UART_CLK_PODF_OFFSET;
143 freq /= (pred + 1) * (podf + 1);
149 + * This function returns the low power audio clock.
154 u32 ccsr = __REG(MXC_CCM_CCSR);
156 if (((ccsr >> 9) & 1) == 0)
157 ret_val = CONFIG_MX51_HCLK_FREQ;
159 ret_val = ((32768 * 1024));
164 static u32 __get_cspi_clk(void)
166 u32 ret_val = 0, pdf, pre_pdf, clk_sel;
167 u32 cscmr1 = __REG(MXC_CCM_CSCMR1);
168 u32 cscdr2 = __REG(MXC_CCM_CSCDR2);
170 pre_pdf = (cscdr2 & MXC_CCM_CSCDR2_CSPI_CLK_PRED_MASK) \
171 >> MXC_CCM_CSCDR2_CSPI_CLK_PRED_OFFSET;
172 pdf = (cscdr2 & MXC_CCM_CSCDR2_CSPI_CLK_PODF_MASK) \
173 >> MXC_CCM_CSCDR2_CSPI_CLK_PODF_OFFSET;
174 clk_sel = (cscmr1 & MXC_CCM_CSCMR1_CSPI_CLK_SEL_MASK) \
175 >> MXC_CCM_CSCMR1_CSPI_CLK_SEL_OFFSET;
179 ret_val = __decode_pll(PLL1_CLK, CONFIG_MX51_HCLK_FREQ) / ((pre_pdf + 1) * (pdf + 1));
182 ret_val = __decode_pll(PLL2_CLK, CONFIG_MX51_HCLK_FREQ) / ((pre_pdf + 1) * (pdf + 1));
185 ret_val = __decode_pll(PLL3_CLK, CONFIG_MX51_HCLK_FREQ) / ((pre_pdf + 1) * (pdf + 1));
188 ret_val = get_lp_apm() / ((pre_pdf + 1) * (pdf + 1));
195 unsigned int mxc_get_clock(enum mxc_clock clk)
199 return __get_mcu_main_clk();
203 return __get_ipg_clk();
205 return __get_ipg_per_clk();
207 return __get_uart_clk();
209 return __get_cspi_clk();
211 return __decode_pll(PLL1_CLK, CONFIG_MX51_HCLK_FREQ);
213 return __decode_pll(PLL3_CLK, CONFIG_MX51_HCLK_FREQ);
220 void mxc_dump_clocks(void)
223 freq = __decode_pll(PLL1_CLK, CONFIG_MX51_HCLK_FREQ);
224 printf("mx51 pll1: %dMHz\n", freq / 1000000);
225 freq = __decode_pll(PLL2_CLK, CONFIG_MX51_HCLK_FREQ);
226 printf("mx51 pll2: %dMHz\n", freq / 1000000);
227 freq = __decode_pll(PLL3_CLK, CONFIG_MX51_HCLK_FREQ);
228 printf("mx51 pll3: %dMHz\n", freq / 1000000);
229 printf("ipg clock : %dHz\n", mxc_get_clock(MXC_IPG_CLK));
230 printf("ipg per clock : %dHz\n", mxc_get_clock(MXC_IPG_PERCLK));
231 printf("uart clock : %dHz\n", mxc_get_clock(MXC_UART_CLK));
232 printf("cspi clock : %dHz\n", mxc_get_clock(MXC_CSPI_CLK));
235 #if defined(CONFIG_DISPLAY_CPUINFO)
236 int print_cpuinfo(void)
238 printf("CPU: Freescale i.MX51 family %d.%dV at %d MHz\n",
239 (get_board_rev() & 0xFF) >> 4,
240 (get_board_rev() & 0xF),
241 __get_mcu_main_clk() / 1000000);
248 * Initializes on-chip ethernet controllers.
249 * to override, implement board_eth_init()
251 #if defined(CONFIG_MXC_FEC)
252 extern int mxc_fec_initialize(bd_t *bis);
253 extern void mxc_fec_set_mac_from_env(char *mac_addr);
256 int cpu_eth_init(bd_t *bis)
260 #if defined(CONFIG_MXC_FEC)
261 rc = mxc_fec_initialize(bis);
267 #if defined(CONFIG_ARCH_CPU_INIT)
268 int arch_cpu_init(void)