3 * Sascha Hauer, Pengutronix
5 * (C) Copyright 2008-2010 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,
28 #include <asm/errno.h>
29 #include <asm/arch/mx35.h>
30 #include <asm/cache-cp15.h>
33 #define CLK_CODE(arm, ahb, sel) (((arm) << 16) + ((ahb) << 8) + (sel))
34 #define CLK_CODE_ARM(c) (((c) >> 16) & 0xFF)
35 #define CLK_CODE_AHB(c) (((c) >> 8) & 0xFF)
36 #define CLK_CODE_PATH(c) ((c) & 0xFF)
38 #define CCM_GET_DIVIDER(x, m, o) (((x) & (m)) >> (o))
40 static int g_clk_mux_auto[8] = {
41 CLK_CODE(1, 3, 0), CLK_CODE(1, 2, 1), CLK_CODE(2, 1, 1), -1,
42 CLK_CODE(1, 6, 0), CLK_CODE(1, 4, 1), CLK_CODE(2, 2, 1), -1,
45 static int g_clk_mux_consumer[16] = {
46 CLK_CODE(1, 4, 0), CLK_CODE(1, 3, 1), CLK_CODE(1, 3, 1), -1,
47 -1, -1, CLK_CODE(4, 1, 0), CLK_CODE(1, 5, 0),
48 CLK_CODE(1, 8, 1), CLK_CODE(1, 6, 1), CLK_CODE(2, 4, 0), -1,
49 -1, -1, CLK_CODE(4, 2, 0), -1,
52 static int hsp_div_table[3][16] = {
53 {4, 3, 2, -1, -1, -1, 1, 5, 4, 3, 2, -1, -1, -1, 1, -1},
54 {-1, -1, -1, -1, -1, -1, -1, -1, 8, 6, 4, -1, -1, -1, 2, -1},
55 {3, -1, -1, -1, -1, -1, -1, -1, 3, -1, -1, -1, -1, -1, -1, -1},
58 static u32 __get_arm_div(u32 pdr0, u32 *fi, u32 *fd)
61 if (pdr0 & MXC_CCM_PDR0_AUTO_CON) {
62 pclk_mux = g_clk_mux_consumer +
63 ((pdr0 & MXC_CCM_PDR0_CON_MUX_DIV_MASK) >>
64 MXC_CCM_PDR0_CON_MUX_DIV_OFFSET);
66 pclk_mux = g_clk_mux_auto +
67 ((pdr0 & MXC_CCM_PDR0_AUTO_MUX_DIV_MASK) >>
68 MXC_CCM_PDR0_AUTO_MUX_DIV_OFFSET);
71 if ((*pclk_mux) == -1)
75 if (!CLK_CODE_PATH(*pclk_mux)) {
77 return CLK_CODE_ARM(*pclk_mux);
79 if (pdr0 & MXC_CCM_PDR0_AUTO_CON) {
87 return CLK_CODE_ARM(*pclk_mux);
90 static int __get_ahb_div(u32 pdr0)
94 pclk_mux = g_clk_mux_consumer +
95 ((pdr0 & MXC_CCM_PDR0_CON_MUX_DIV_MASK) >>
96 MXC_CCM_PDR0_CON_MUX_DIV_OFFSET);
98 if ((*pclk_mux) == -1)
101 return CLK_CODE_AHB(*pclk_mux);
104 static u32 __decode_pll(u32 reg, u32 infreq)
106 u32 mfi = (reg >> 10) & 0xf;
107 u32 mfn = reg & 0x3f;
108 u32 mfd = (reg >> 16) & 0x3f;
109 u32 pd = (reg >> 26) & 0xf;
111 mfi = mfi <= 5 ? 5 : mfi;
115 return ((2 * (infreq / 1000) * (mfi * mfd + mfn)) / (mfd * pd)) * 1000;
118 static u32 __get_mcu_main_clk(void)
120 u32 arm_div = 0, fi = 0, fd = 0;
121 arm_div = __get_arm_div(__REG(CCM_BASE_ADDR + CLKCTL_PDR0), &fi, &fd);
123 __decode_pll(__REG(MCU_PLL),
124 CONFIG_MX35_HCLK_FREQ);
125 return fi / (arm_div * fd);
128 static u32 __get_ipg_clk(void)
130 u32 freq = __get_mcu_main_clk();
131 u32 pdr0 = __REG(CCM_BASE_ADDR + CLKCTL_PDR0);
133 return freq / (__get_ahb_div(pdr0) * 2);
136 static u32 __get_ipg_per_clk(void)
138 u32 freq = __get_mcu_main_clk();
139 u32 pdr0 = __REG(CCM_BASE_ADDR + CLKCTL_PDR0);
140 u32 pdr4 = __REG(CCM_BASE_ADDR + CLKCTL_PDR4);
142 if (pdr0 & MXC_CCM_PDR0_PER_SEL) {
143 div = (CCM_GET_DIVIDER(pdr4,
144 MXC_CCM_PDR4_PER0_PRDF_MASK,
145 MXC_CCM_PDR4_PER0_PODF_OFFSET) + 1) *
146 (CCM_GET_DIVIDER(pdr4,
147 MXC_CCM_PDR4_PER0_PODF_MASK,
148 MXC_CCM_PDR4_PER0_PODF_OFFSET) + 1);
150 div = CCM_GET_DIVIDER(pdr0,
151 MXC_CCM_PDR0_PER_PODF_MASK,
152 MXC_CCM_PDR0_PER_PODF_OFFSET) + 1;
153 freq /= __get_ahb_div(pdr0);
158 static u32 __get_uart_clk(void)
161 u32 pdr4 = __REG(CCM_BASE_ADDR + CLKCTL_PDR4);
163 if (__REG(CCM_BASE_ADDR + CLKCTL_PDR3) & MXC_CCM_PDR3_UART_M_U)
164 freq = __get_mcu_main_clk();
166 freq = __decode_pll(__REG(PER_PLL),
167 CONFIG_MX35_HCLK_FREQ);
168 freq /= ((CCM_GET_DIVIDER(pdr4,
169 MXC_CCM_PDR4_UART_PRDF_MASK,
170 MXC_CCM_PDR4_UART_PRDF_OFFSET) + 1) *
171 (CCM_GET_DIVIDER(pdr4,
172 MXC_CCM_PDR4_UART_PODF_MASK,
173 MXC_CCM_PDR4_UART_PODF_OFFSET) + 1));
177 unsigned int mxc_get_main_clock(enum mxc_main_clocks clk)
179 u32 nfc_pdf, hsp_podf;
180 u32 pll, ret_val = 0, usb_prdf, usb_podf;
182 u32 reg = readl(CCM_BASE_ADDR + CLKCTL_PDR0);
183 u32 reg4 = readl(CCM_BASE_ADDR + CLKCTL_PDR4);
189 ret_val = __get_mcu_main_clk();
192 ret_val = __get_mcu_main_clk();
195 if (reg & CLKMODE_CONSUMER) {
196 hsp_podf = (reg >> 20) & 0x3;
197 pll = __get_mcu_main_clk();
198 hsp_podf = hsp_div_table[hsp_podf][(reg>>16)&0xF];
200 ret_val = pll / hsp_podf;
202 puts("mismatch HSP with ARM clock setting\n");
206 ret_val = __get_mcu_main_clk();
210 ret_val = __get_ipg_clk();;
213 ret_val = __get_ipg_per_clk();
216 nfc_pdf = (reg4 >> 28) & 0xF;
217 pll = __get_mcu_main_clk();
219 ret_val = pll / (nfc_pdf + 1);
222 usb_prdf = (reg4 >> 25) & 0x7;
223 usb_podf = (reg4 >> 22) & 0x7;
225 pll = __get_mcu_main_clk();
227 pll = __decode_pll(__REG(PER_PLL), CONFIG_MX35_HCLK_FREQ);
229 ret_val = pll / ((usb_prdf + 1) * (usb_podf + 1));
232 printf("Unknown clock: %d\n", clk);
238 unsigned int mxc_get_peri_clock(enum mxc_peri_clocks clk)
240 u32 ret_val = 0, pdf, pre_pdf, clk_sel;
241 u32 mpdr2 = readl(CCM_BASE_ADDR + CLKCTL_PDR2);
242 u32 mpdr3 = readl(CCM_BASE_ADDR + CLKCTL_PDR3);
243 u32 mpdr4 = readl(CCM_BASE_ADDR + CLKCTL_PDR4);
249 clk_sel = mpdr3 & (1 << 14);
250 pre_pdf = (mpdr4 >> 13) & 0x7;
251 pdf = (mpdr4 >> 10) & 0x7;
252 ret_val = ((clk_sel != 0) ? mxc_get_main_clock(CPU_CLK) :
253 __decode_pll(__REG(PER_PLL), CONFIG_MX35_HCLK_FREQ)) / ((pre_pdf + 1) * (pdf + 1));
256 pre_pdf = (mpdr2 >> 24) & 0x7;
258 clk_sel = mpdr2 & ( 1 << 6);
259 ret_val = ((clk_sel != 0) ? mxc_get_main_clock(CPU_CLK) :
260 __decode_pll(__REG(PER_PLL), CONFIG_MX35_HCLK_FREQ)) / ((pre_pdf + 1) * (pdf + 1));
263 pre_pdf = (mpdr2 >> 27) & 0x7;
264 pdf = (mpdr2 >> 8)& 0x3F;
265 clk_sel = mpdr2 & ( 1 << 6);
266 ret_val = ((clk_sel != 0) ? mxc_get_main_clock(CPU_CLK) :
267 __decode_pll(__REG(PER_PLL), CONFIG_MX35_HCLK_FREQ)) / ((pre_pdf + 1) * (pdf + 1));
270 clk_sel = mpdr2 & (1 << 7);
271 pre_pdf = (mpdr2 >> 16) & 0x7;
272 pdf = (mpdr2 >> 19) & 0x7;
273 ret_val = ((clk_sel != 0) ? mxc_get_main_clock(CPU_CLK) :
274 __decode_pll(__REG(PER_PLL), CONFIG_MX35_HCLK_FREQ)) / ((pre_pdf + 1) * (pdf + 1));
277 pre_pdf = readl(CCM_BASE_ADDR + CLKCTL_PDR1);
278 clk_sel = (pre_pdf & 0x80);
279 pdf = (pre_pdf >> 22) & 0x3F;
280 pre_pdf = (pre_pdf >> 28) & 0x7;
281 ret_val = ((clk_sel != 0)? mxc_get_main_clock(CPU_CLK) :
282 __decode_pll(__REG(PER_PLL), CONFIG_MX35_HCLK_FREQ)) / ((pre_pdf + 1) * (pdf + 1));
285 clk_sel = mpdr3 & 0x40;
287 pdf = (mpdr3>>3)&0x7;
288 ret_val = ((clk_sel != 0)? mxc_get_main_clock(CPU_CLK) :
289 __decode_pll(__REG(PER_PLL), CONFIG_MX35_HCLK_FREQ)) / ((pre_pdf + 1) * (pdf + 1));
292 clk_sel = mpdr3 & 0x40;
293 pre_pdf = (mpdr3 >> 8)&0x7;
294 pdf = (mpdr3 >> 11)&0x7;
295 ret_val = ((clk_sel != 0)? mxc_get_main_clock(CPU_CLK) :
296 __decode_pll(__REG(PER_PLL), CONFIG_MX35_HCLK_FREQ)) / ((pre_pdf + 1) * (pdf + 1));
299 clk_sel = mpdr3 & 0x40;
300 pre_pdf = (mpdr3 >> 16)&0x7;
301 pdf = (mpdr3 >> 19)&0x7;
302 ret_val = ((clk_sel != 0)? mxc_get_main_clock(CPU_CLK) :
303 __decode_pll(__REG(PER_PLL), CONFIG_MX35_HCLK_FREQ)) / ((pre_pdf + 1) * (pdf + 1));
306 clk_sel = mpdr3 & 0x400000;
307 pre_pdf = (mpdr3 >> 29)&0x7;
308 pdf = (mpdr3 >> 23)&0x3F;
309 ret_val = ((clk_sel != 0)? mxc_get_main_clock(CPU_CLK) :
310 __decode_pll(__REG(PER_PLL), CONFIG_MX35_HCLK_FREQ)) / ((pre_pdf + 1) * (pdf + 1));
313 printf("%s(): This clock: %d not supported yet \n",
321 unsigned int mxc_get_clock(enum mxc_clock clk)
325 return __get_mcu_main_clk();
329 return __get_ipg_clk();
331 return __get_ipg_per_clk();
333 return __get_uart_clk();
335 return mxc_get_peri_clock(ESDHC1_CLK);
337 return mxc_get_main_clock(USB_CLK);
342 void mxc_dump_clocks(void)
344 u32 cpufreq = __get_mcu_main_clk();
345 printf("mx35 cpu clock: %dMHz\n", cpufreq / 1000000);
346 printf("ipg clock : %dHz\n", __get_ipg_clk());
347 printf("ipg per clock : %dHz\n", __get_ipg_per_clk());
348 printf("uart clock : %dHz\n", mxc_get_clock(MXC_UART_CLK));
351 #if defined(CONFIG_DISPLAY_CPUINFO)
352 int print_cpuinfo(void)
354 printf("CPU: Freescale i.MX35 at %d MHz\n",
355 __get_mcu_main_clk() / 1000000);
356 /* mxc_dump_clocks(); */
361 #if defined(CONFIG_MXC_FEC)
362 extern int mxc_fec_initialize(bd_t *bis);
363 extern void mxc_fec_set_mac_from_env(char *mac_addr);
367 * Initializes on-chip ethernet controllers.
368 * to override, implement board_eth_init()
370 int cpu_eth_init(bd_t *bis)
374 #if defined(CONFIG_MXC_FEC)
375 rc = mxc_fec_initialize(bis);
381 #if defined(CONFIG_ARCH_CPU_INIT)
382 int arch_cpu_init(void)