1 // SPDX-License-Identifier: GPL-2.0+
4 * Sascha Hauer, Pengutronix
6 * (C) Copyright 2008-2010 Freescale Semiconductor, Inc.
10 #include <clock_legacy.h>
16 #include <linux/errno.h>
17 #include <asm/arch/imx-regs.h>
18 #include <asm/arch/crm_regs.h>
19 #include <asm/arch/clock.h>
20 #include <asm/arch/sys_proto.h>
21 #ifdef CONFIG_FSL_ESDHC_IMX
22 #include <fsl_esdhc_imx.h>
27 #define CLK_CODE(arm, ahb, sel) (((arm) << 16) + ((ahb) << 8) + (sel))
28 #define CLK_CODE_ARM(c) (((c) >> 16) & 0xFF)
29 #define CLK_CODE_AHB(c) (((c) >> 8) & 0xFF)
30 #define CLK_CODE_PATH(c) ((c) & 0xFF)
32 #define CCM_GET_DIVIDER(x, m, o) (((x) & (m)) >> (o))
34 #ifdef CONFIG_FSL_ESDHC_IMX
35 DECLARE_GLOBAL_DATA_PTR;
38 static int g_clk_mux_auto[8] = {
39 CLK_CODE(1, 3, 0), CLK_CODE(1, 2, 1), CLK_CODE(2, 1, 1), -1,
40 CLK_CODE(1, 6, 0), CLK_CODE(1, 4, 1), CLK_CODE(2, 2, 1), -1,
43 static int g_clk_mux_consumer[16] = {
44 CLK_CODE(1, 4, 0), CLK_CODE(1, 3, 1), CLK_CODE(1, 3, 1), -1,
45 -1, -1, CLK_CODE(4, 1, 0), CLK_CODE(1, 5, 0),
46 CLK_CODE(1, 8, 1), CLK_CODE(1, 6, 1), CLK_CODE(2, 4, 0), -1,
47 -1, -1, CLK_CODE(4, 2, 0), -1,
50 static int hsp_div_table[3][16] = {
51 {4, 3, 2, -1, -1, -1, 1, 5, 4, 3, 2, -1, -1, -1, 1, -1},
52 {-1, -1, -1, -1, -1, -1, -1, -1, 8, 6, 4, -1, -1, -1, 2, -1},
53 {3, -1, -1, -1, -1, -1, -1, -1, 3, -1, -1, -1, -1, -1, -1, -1},
59 struct iim_regs *iim =
60 (struct iim_regs *)IIM_BASE_ADDR;
61 reg = readl(&iim->iim_srev);
63 reg = readw(ROMPATCH_REV);
69 return 0x35000 + (reg & 0xFF);
72 static u32 get_arm_div(u32 pdr0, u32 *fi, u32 *fd)
75 if (pdr0 & MXC_CCM_PDR0_AUTO_CON) {
76 pclk_mux = g_clk_mux_consumer +
77 ((pdr0 & MXC_CCM_PDR0_CON_MUX_DIV_MASK) >>
78 MXC_CCM_PDR0_CON_MUX_DIV_OFFSET);
80 pclk_mux = g_clk_mux_auto +
81 ((pdr0 & MXC_CCM_PDR0_AUTO_MUX_DIV_MASK) >>
82 MXC_CCM_PDR0_AUTO_MUX_DIV_OFFSET);
85 if ((*pclk_mux) == -1)
89 if (!CLK_CODE_PATH(*pclk_mux)) {
91 return CLK_CODE_ARM(*pclk_mux);
93 if (pdr0 & MXC_CCM_PDR0_AUTO_CON) {
101 return CLK_CODE_ARM(*pclk_mux);
104 static int get_ahb_div(u32 pdr0)
108 pclk_mux = g_clk_mux_consumer +
109 ((pdr0 & MXC_CCM_PDR0_CON_MUX_DIV_MASK) >>
110 MXC_CCM_PDR0_CON_MUX_DIV_OFFSET);
112 if ((*pclk_mux) == -1)
115 return CLK_CODE_AHB(*pclk_mux);
118 static u32 decode_pll(u32 reg, u32 infreq)
120 u32 mfi = (reg >> 10) & 0xf;
121 s32 mfn = reg & 0x3ff;
122 u32 mfd = (reg >> 16) & 0x3ff;
123 u32 pd = (reg >> 26) & 0xf;
125 mfi = mfi <= 5 ? 5 : mfi;
126 mfn = mfn >= 512 ? mfn - 1024 : mfn;
130 return lldiv(2 * (u64)infreq * (mfi * mfd + mfn),
134 static u32 get_mcu_main_clk(void)
136 u32 arm_div = 0, fi = 0, fd = 0;
137 struct ccm_regs *ccm =
138 (struct ccm_regs *)IMX_CCM_BASE;
139 arm_div = get_arm_div(readl(&ccm->pdr0), &fi, &fd);
140 fi *= decode_pll(readl(&ccm->mpctl), MXC_HCLK);
141 return fi / (arm_div * fd);
144 static u32 get_ipg_clk(void)
146 u32 freq = get_mcu_main_clk();
147 struct ccm_regs *ccm =
148 (struct ccm_regs *)IMX_CCM_BASE;
149 u32 pdr0 = readl(&ccm->pdr0);
151 return freq / (get_ahb_div(pdr0) * 2);
154 static u32 get_ipg_per_clk(void)
156 u32 freq = get_mcu_main_clk();
157 struct ccm_regs *ccm =
158 (struct ccm_regs *)IMX_CCM_BASE;
159 u32 pdr0 = readl(&ccm->pdr0);
160 u32 pdr4 = readl(&ccm->pdr4);
162 if (pdr0 & MXC_CCM_PDR0_PER_SEL) {
163 div = CCM_GET_DIVIDER(pdr4,
164 MXC_CCM_PDR4_PER0_PODF_MASK,
165 MXC_CCM_PDR4_PER0_PODF_OFFSET) + 1;
167 div = CCM_GET_DIVIDER(pdr0,
168 MXC_CCM_PDR0_PER_PODF_MASK,
169 MXC_CCM_PDR0_PER_PODF_OFFSET) + 1;
170 div *= get_ahb_div(pdr0);
175 u32 imx_get_uartclk(void)
178 struct ccm_regs *ccm =
179 (struct ccm_regs *)IMX_CCM_BASE;
180 u32 pdr4 = readl(&ccm->pdr4);
182 if (readl(&ccm->pdr3) & MXC_CCM_PDR3_UART_M_U)
183 freq = get_mcu_main_clk();
185 freq = decode_pll(readl(&ccm->ppctl), MXC_HCLK);
186 freq /= CCM_GET_DIVIDER(pdr4,
187 MXC_CCM_PDR4_UART_PODF_MASK,
188 MXC_CCM_PDR4_UART_PODF_OFFSET) + 1;
192 unsigned int mxc_get_main_clock(enum mxc_main_clock clk)
194 u32 nfc_pdf, hsp_podf;
195 u32 pll, ret_val = 0, usb_podf;
196 struct ccm_regs *ccm =
197 (struct ccm_regs *)IMX_CCM_BASE;
199 u32 reg = readl(&ccm->pdr0);
200 u32 reg4 = readl(&ccm->pdr4);
206 ret_val = get_mcu_main_clk();
209 ret_val = get_mcu_main_clk();
212 if (reg & CLKMODE_CONSUMER) {
213 hsp_podf = (reg >> 20) & 0x3;
214 pll = get_mcu_main_clk();
215 hsp_podf = hsp_div_table[hsp_podf][(reg>>16)&0xF];
217 ret_val = pll / hsp_podf;
219 puts("mismatch HSP with ARM clock setting\n");
223 ret_val = get_mcu_main_clk();
227 ret_val = get_ipg_clk();
230 ret_val = get_ipg_per_clk();
233 nfc_pdf = (reg4 >> 28) & 0xF;
234 pll = get_mcu_main_clk();
236 ret_val = pll / (nfc_pdf + 1);
239 usb_podf = (reg4 >> 22) & 0x3F;
241 pll = get_mcu_main_clk();
243 pll = decode_pll(readl(&ccm->ppctl), MXC_HCLK);
245 ret_val = pll / (usb_podf + 1);
248 printf("Unknown clock: %d\n", clk);
254 unsigned int mxc_get_peri_clock(enum mxc_peri_clock clk)
256 u32 ret_val = 0, pdf, pre_pdf, clk_sel;
257 struct ccm_regs *ccm =
258 (struct ccm_regs *)IMX_CCM_BASE;
259 u32 mpdr2 = readl(&ccm->pdr2);
260 u32 mpdr3 = readl(&ccm->pdr3);
261 u32 mpdr4 = readl(&ccm->pdr4);
267 clk_sel = mpdr3 & (1 << 14);
268 pdf = (mpdr4 >> 10) & 0x3F;
269 ret_val = ((clk_sel != 0) ? mxc_get_main_clock(CPU_CLK) :
270 decode_pll(readl(&ccm->ppctl), MXC_HCLK)) / (pdf + 1);
273 pre_pdf = (mpdr2 >> 24) & 0x7;
275 clk_sel = mpdr2 & (1 << 6);
276 ret_val = ((clk_sel != 0) ? mxc_get_main_clock(CPU_CLK) :
277 decode_pll(readl(&ccm->ppctl), MXC_HCLK)) /
278 ((pre_pdf + 1) * (pdf + 1));
281 pre_pdf = (mpdr2 >> 27) & 0x7;
282 pdf = (mpdr2 >> 8) & 0x3F;
283 clk_sel = mpdr2 & (1 << 6);
284 ret_val = ((clk_sel != 0) ? mxc_get_main_clock(CPU_CLK) :
285 decode_pll(readl(&ccm->ppctl), MXC_HCLK)) /
286 ((pre_pdf + 1) * (pdf + 1));
289 clk_sel = mpdr2 & (1 << 7);
290 pdf = (mpdr2 >> 16) & 0x3F;
291 ret_val = ((clk_sel != 0) ? mxc_get_main_clock(CPU_CLK) :
292 decode_pll(readl(&ccm->ppctl), MXC_HCLK)) / (pdf + 1);
295 pre_pdf = readl(&ccm->pdr1);
296 clk_sel = (pre_pdf & 0x80);
297 pdf = (pre_pdf >> 22) & 0x3F;
298 pre_pdf = (pre_pdf >> 28) & 0x7;
299 ret_val = ((clk_sel != 0) ? mxc_get_main_clock(CPU_CLK) :
300 decode_pll(readl(&ccm->ppctl), MXC_HCLK)) /
301 ((pre_pdf + 1) * (pdf + 1));
304 clk_sel = mpdr3 & 0x40;
306 ret_val = ((clk_sel != 0) ? mxc_get_main_clock(CPU_CLK) :
307 decode_pll(readl(&ccm->ppctl), MXC_HCLK)) / (pdf + 1);
310 clk_sel = mpdr3 & 0x40;
311 pdf = (mpdr3 >> 8) & 0x3F;
312 ret_val = ((clk_sel != 0) ? mxc_get_main_clock(CPU_CLK) :
313 decode_pll(readl(&ccm->ppctl), MXC_HCLK)) / (pdf + 1);
316 clk_sel = mpdr3 & 0x40;
317 pdf = (mpdr3 >> 16) & 0x3F;
318 ret_val = ((clk_sel != 0) ? mxc_get_main_clock(CPU_CLK) :
319 decode_pll(readl(&ccm->ppctl), MXC_HCLK)) / (pdf + 1);
322 clk_sel = mpdr3 & 0x400000;
323 pre_pdf = (mpdr3 >> 29) & 0x7;
324 pdf = (mpdr3 >> 23) & 0x3F;
325 ret_val = ((clk_sel != 0) ? mxc_get_main_clock(CPU_CLK) :
326 decode_pll(readl(&ccm->ppctl), MXC_HCLK)) /
327 ((pre_pdf + 1) * (pdf + 1));
330 printf("%s(): This clock: %d not supported yet\n",
338 unsigned int mxc_get_clock(enum mxc_clock clk)
342 return get_mcu_main_clk();
346 return get_ipg_clk();
349 return get_ipg_per_clk();
351 return imx_get_uartclk();
353 return mxc_get_peri_clock(ESDHC1_CLK);
355 return mxc_get_peri_clock(ESDHC2_CLK);
357 return mxc_get_peri_clock(ESDHC3_CLK);
359 return mxc_get_main_clock(USB_CLK);
361 return get_ipg_clk();
363 return get_ipg_clk();
368 #ifdef CONFIG_FEC_MXC
370 * The MX35 has no fuse for MAC, return a NULL MAC
372 void imx_get_mac_from_fuse(int dev_id, unsigned char *mac)
377 u32 imx_get_fecclk(void)
379 return mxc_get_clock(MXC_IPG_CLK);
383 int do_mx35_showclocks(struct cmd_tbl *cmdtp, int flag, int argc,
386 u32 cpufreq = get_mcu_main_clk();
387 printf("mx35 cpu clock: %dMHz\n", cpufreq / 1000000);
388 printf("ipg clock : %dHz\n", get_ipg_clk());
389 printf("ipg per clock : %dHz\n", get_ipg_per_clk());
390 printf("uart clock : %dHz\n", mxc_get_clock(MXC_UART_CLK));
396 clocks, CONFIG_SYS_MAXARGS, 1, do_mx35_showclocks,
401 #if defined(CONFIG_DISPLAY_CPUINFO)
402 static char *get_reset_cause(void)
404 /* read RCSR register from CCM module */
405 struct ccm_regs *ccm =
406 (struct ccm_regs *)IMX_CCM_BASE;
408 u32 cause = readl(&ccm->rcsr) & 0x0F;
420 return "unknown reset";
424 int print_cpuinfo(void)
426 u32 srev = get_cpu_rev();
428 printf("CPU: Freescale i.MX35 rev %d.%d at %d MHz.\n",
429 (srev & 0xF0) >> 4, (srev & 0x0F),
430 get_mcu_main_clk() / 1000000);
432 printf("Reset cause: %s\n", get_reset_cause());
439 * Initializes on-chip ethernet controllers.
440 * to override, implement board_eth_init()
442 int cpu_eth_init(bd_t *bis)
446 #if defined(CONFIG_FEC_MXC)
447 rc = fecmxc_initialize(bis);
453 #ifdef CONFIG_FSL_ESDHC_IMX
455 * Initializes on-chip MMC controllers.
456 * to override, implement board_mmc_init()
458 int cpu_mmc_init(bd_t *bis)
460 return fsl_esdhc_mmc_init(bis);
466 #ifdef CONFIG_FSL_ESDHC_IMX
467 #if CONFIG_SYS_FSL_ESDHC_ADDR == MMC_SDHC2_BASE_ADDR
468 gd->arch.sdhc_clk = mxc_get_clock(MXC_ESDHC2_CLK);
469 #elif CONFIG_SYS_FSL_ESDHC_ADDR == MMC_SDHC3_BASE_ADDR
470 gd->arch.sdhc_clk = mxc_get_clock(MXC_ESDHC3_CLK);
472 gd->arch.sdhc_clk = mxc_get_clock(MXC_ESDHC1_CLK);
478 #define RCSR_MEM_CTL_WEIM 0
479 #define RCSR_MEM_CTL_NAND 1
480 #define RCSR_MEM_CTL_ATA 2
481 #define RCSR_MEM_CTL_EXPANSION 3
482 #define RCSR_MEM_TYPE_NOR 0
483 #define RCSR_MEM_TYPE_ONENAND 2
484 #define RCSR_MEM_TYPE_SD 0
485 #define RCSR_MEM_TYPE_I2C 2
486 #define RCSR_MEM_TYPE_SPI 3
488 u32 spl_boot_device(void)
490 struct ccm_regs *ccm =
491 (struct ccm_regs *)IMX_CCM_BASE;
493 u32 rcsr = readl(&ccm->rcsr);
494 u32 mem_type, mem_ctl;
496 /* In external mode, no boot device is returned */
497 if ((rcsr >> 10) & 0x03)
498 return BOOT_DEVICE_NONE;
500 mem_ctl = (rcsr >> 25) & 0x03;
501 mem_type = (rcsr >> 23) & 0x03;
504 case RCSR_MEM_CTL_WEIM:
506 case RCSR_MEM_TYPE_NOR:
507 return BOOT_DEVICE_NOR;
508 case RCSR_MEM_TYPE_ONENAND:
509 return BOOT_DEVICE_ONENAND;
511 return BOOT_DEVICE_NONE;
513 case RCSR_MEM_CTL_NAND:
514 return BOOT_DEVICE_NAND;
515 case RCSR_MEM_CTL_EXPANSION:
517 case RCSR_MEM_TYPE_SD:
518 return BOOT_DEVICE_MMC1;
519 case RCSR_MEM_TYPE_I2C:
520 return BOOT_DEVICE_I2C;
521 case RCSR_MEM_TYPE_SPI:
522 return BOOT_DEVICE_SPI;
524 return BOOT_DEVICE_NONE;
528 return BOOT_DEVICE_NONE;