1 // SPDX-License-Identifier: GPL-2.0+
4 * Sascha Hauer, Pengutronix
6 * (C) Copyright 2008-2010 Freescale Semiconductor, Inc.
10 #include <clock_legacy.h>
15 #include <linux/errno.h>
16 #include <asm/arch/imx-regs.h>
17 #include <asm/arch/crm_regs.h>
18 #include <asm/arch/clock.h>
19 #include <asm/arch/sys_proto.h>
20 #ifdef CONFIG_FSL_ESDHC_IMX
21 #include <fsl_esdhc_imx.h>
26 #define CLK_CODE(arm, ahb, sel) (((arm) << 16) + ((ahb) << 8) + (sel))
27 #define CLK_CODE_ARM(c) (((c) >> 16) & 0xFF)
28 #define CLK_CODE_AHB(c) (((c) >> 8) & 0xFF)
29 #define CLK_CODE_PATH(c) ((c) & 0xFF)
31 #define CCM_GET_DIVIDER(x, m, o) (((x) & (m)) >> (o))
33 #ifdef CONFIG_FSL_ESDHC_IMX
34 DECLARE_GLOBAL_DATA_PTR;
37 static int g_clk_mux_auto[8] = {
38 CLK_CODE(1, 3, 0), CLK_CODE(1, 2, 1), CLK_CODE(2, 1, 1), -1,
39 CLK_CODE(1, 6, 0), CLK_CODE(1, 4, 1), CLK_CODE(2, 2, 1), -1,
42 static int g_clk_mux_consumer[16] = {
43 CLK_CODE(1, 4, 0), CLK_CODE(1, 3, 1), CLK_CODE(1, 3, 1), -1,
44 -1, -1, CLK_CODE(4, 1, 0), CLK_CODE(1, 5, 0),
45 CLK_CODE(1, 8, 1), CLK_CODE(1, 6, 1), CLK_CODE(2, 4, 0), -1,
46 -1, -1, CLK_CODE(4, 2, 0), -1,
49 static int hsp_div_table[3][16] = {
50 {4, 3, 2, -1, -1, -1, 1, 5, 4, 3, 2, -1, -1, -1, 1, -1},
51 {-1, -1, -1, -1, -1, -1, -1, -1, 8, 6, 4, -1, -1, -1, 2, -1},
52 {3, -1, -1, -1, -1, -1, -1, -1, 3, -1, -1, -1, -1, -1, -1, -1},
58 struct iim_regs *iim =
59 (struct iim_regs *)IIM_BASE_ADDR;
60 reg = readl(&iim->iim_srev);
62 reg = readw(ROMPATCH_REV);
68 return 0x35000 + (reg & 0xFF);
71 static u32 get_arm_div(u32 pdr0, u32 *fi, u32 *fd)
74 if (pdr0 & MXC_CCM_PDR0_AUTO_CON) {
75 pclk_mux = g_clk_mux_consumer +
76 ((pdr0 & MXC_CCM_PDR0_CON_MUX_DIV_MASK) >>
77 MXC_CCM_PDR0_CON_MUX_DIV_OFFSET);
79 pclk_mux = g_clk_mux_auto +
80 ((pdr0 & MXC_CCM_PDR0_AUTO_MUX_DIV_MASK) >>
81 MXC_CCM_PDR0_AUTO_MUX_DIV_OFFSET);
84 if ((*pclk_mux) == -1)
88 if (!CLK_CODE_PATH(*pclk_mux)) {
90 return CLK_CODE_ARM(*pclk_mux);
92 if (pdr0 & MXC_CCM_PDR0_AUTO_CON) {
100 return CLK_CODE_ARM(*pclk_mux);
103 static int get_ahb_div(u32 pdr0)
107 pclk_mux = g_clk_mux_consumer +
108 ((pdr0 & MXC_CCM_PDR0_CON_MUX_DIV_MASK) >>
109 MXC_CCM_PDR0_CON_MUX_DIV_OFFSET);
111 if ((*pclk_mux) == -1)
114 return CLK_CODE_AHB(*pclk_mux);
117 static u32 decode_pll(u32 reg, u32 infreq)
119 u32 mfi = (reg >> 10) & 0xf;
120 s32 mfn = reg & 0x3ff;
121 u32 mfd = (reg >> 16) & 0x3ff;
122 u32 pd = (reg >> 26) & 0xf;
124 mfi = mfi <= 5 ? 5 : mfi;
125 mfn = mfn >= 512 ? mfn - 1024 : mfn;
129 return lldiv(2 * (u64)infreq * (mfi * mfd + mfn),
133 static u32 get_mcu_main_clk(void)
135 u32 arm_div = 0, fi = 0, fd = 0;
136 struct ccm_regs *ccm =
137 (struct ccm_regs *)IMX_CCM_BASE;
138 arm_div = get_arm_div(readl(&ccm->pdr0), &fi, &fd);
139 fi *= decode_pll(readl(&ccm->mpctl), MXC_HCLK);
140 return fi / (arm_div * fd);
143 static u32 get_ipg_clk(void)
145 u32 freq = get_mcu_main_clk();
146 struct ccm_regs *ccm =
147 (struct ccm_regs *)IMX_CCM_BASE;
148 u32 pdr0 = readl(&ccm->pdr0);
150 return freq / (get_ahb_div(pdr0) * 2);
153 static u32 get_ipg_per_clk(void)
155 u32 freq = get_mcu_main_clk();
156 struct ccm_regs *ccm =
157 (struct ccm_regs *)IMX_CCM_BASE;
158 u32 pdr0 = readl(&ccm->pdr0);
159 u32 pdr4 = readl(&ccm->pdr4);
161 if (pdr0 & MXC_CCM_PDR0_PER_SEL) {
162 div = CCM_GET_DIVIDER(pdr4,
163 MXC_CCM_PDR4_PER0_PODF_MASK,
164 MXC_CCM_PDR4_PER0_PODF_OFFSET) + 1;
166 div = CCM_GET_DIVIDER(pdr0,
167 MXC_CCM_PDR0_PER_PODF_MASK,
168 MXC_CCM_PDR0_PER_PODF_OFFSET) + 1;
169 div *= get_ahb_div(pdr0);
174 u32 imx_get_uartclk(void)
177 struct ccm_regs *ccm =
178 (struct ccm_regs *)IMX_CCM_BASE;
179 u32 pdr4 = readl(&ccm->pdr4);
181 if (readl(&ccm->pdr3) & MXC_CCM_PDR3_UART_M_U)
182 freq = get_mcu_main_clk();
184 freq = decode_pll(readl(&ccm->ppctl), MXC_HCLK);
185 freq /= CCM_GET_DIVIDER(pdr4,
186 MXC_CCM_PDR4_UART_PODF_MASK,
187 MXC_CCM_PDR4_UART_PODF_OFFSET) + 1;
191 unsigned int mxc_get_main_clock(enum mxc_main_clock clk)
193 u32 nfc_pdf, hsp_podf;
194 u32 pll, ret_val = 0, usb_podf;
195 struct ccm_regs *ccm =
196 (struct ccm_regs *)IMX_CCM_BASE;
198 u32 reg = readl(&ccm->pdr0);
199 u32 reg4 = readl(&ccm->pdr4);
205 ret_val = get_mcu_main_clk();
208 ret_val = get_mcu_main_clk();
211 if (reg & CLKMODE_CONSUMER) {
212 hsp_podf = (reg >> 20) & 0x3;
213 pll = get_mcu_main_clk();
214 hsp_podf = hsp_div_table[hsp_podf][(reg>>16)&0xF];
216 ret_val = pll / hsp_podf;
218 puts("mismatch HSP with ARM clock setting\n");
222 ret_val = get_mcu_main_clk();
226 ret_val = get_ipg_clk();
229 ret_val = get_ipg_per_clk();
232 nfc_pdf = (reg4 >> 28) & 0xF;
233 pll = get_mcu_main_clk();
235 ret_val = pll / (nfc_pdf + 1);
238 usb_podf = (reg4 >> 22) & 0x3F;
240 pll = get_mcu_main_clk();
242 pll = decode_pll(readl(&ccm->ppctl), MXC_HCLK);
244 ret_val = pll / (usb_podf + 1);
247 printf("Unknown clock: %d\n", clk);
253 unsigned int mxc_get_peri_clock(enum mxc_peri_clock clk)
255 u32 ret_val = 0, pdf, pre_pdf, clk_sel;
256 struct ccm_regs *ccm =
257 (struct ccm_regs *)IMX_CCM_BASE;
258 u32 mpdr2 = readl(&ccm->pdr2);
259 u32 mpdr3 = readl(&ccm->pdr3);
260 u32 mpdr4 = readl(&ccm->pdr4);
266 clk_sel = mpdr3 & (1 << 14);
267 pdf = (mpdr4 >> 10) & 0x3F;
268 ret_val = ((clk_sel != 0) ? mxc_get_main_clock(CPU_CLK) :
269 decode_pll(readl(&ccm->ppctl), MXC_HCLK)) / (pdf + 1);
272 pre_pdf = (mpdr2 >> 24) & 0x7;
274 clk_sel = mpdr2 & (1 << 6);
275 ret_val = ((clk_sel != 0) ? mxc_get_main_clock(CPU_CLK) :
276 decode_pll(readl(&ccm->ppctl), MXC_HCLK)) /
277 ((pre_pdf + 1) * (pdf + 1));
280 pre_pdf = (mpdr2 >> 27) & 0x7;
281 pdf = (mpdr2 >> 8) & 0x3F;
282 clk_sel = mpdr2 & (1 << 6);
283 ret_val = ((clk_sel != 0) ? mxc_get_main_clock(CPU_CLK) :
284 decode_pll(readl(&ccm->ppctl), MXC_HCLK)) /
285 ((pre_pdf + 1) * (pdf + 1));
288 clk_sel = mpdr2 & (1 << 7);
289 pdf = (mpdr2 >> 16) & 0x3F;
290 ret_val = ((clk_sel != 0) ? mxc_get_main_clock(CPU_CLK) :
291 decode_pll(readl(&ccm->ppctl), MXC_HCLK)) / (pdf + 1);
294 pre_pdf = readl(&ccm->pdr1);
295 clk_sel = (pre_pdf & 0x80);
296 pdf = (pre_pdf >> 22) & 0x3F;
297 pre_pdf = (pre_pdf >> 28) & 0x7;
298 ret_val = ((clk_sel != 0) ? mxc_get_main_clock(CPU_CLK) :
299 decode_pll(readl(&ccm->ppctl), MXC_HCLK)) /
300 ((pre_pdf + 1) * (pdf + 1));
303 clk_sel = mpdr3 & 0x40;
305 ret_val = ((clk_sel != 0) ? mxc_get_main_clock(CPU_CLK) :
306 decode_pll(readl(&ccm->ppctl), MXC_HCLK)) / (pdf + 1);
309 clk_sel = mpdr3 & 0x40;
310 pdf = (mpdr3 >> 8) & 0x3F;
311 ret_val = ((clk_sel != 0) ? mxc_get_main_clock(CPU_CLK) :
312 decode_pll(readl(&ccm->ppctl), MXC_HCLK)) / (pdf + 1);
315 clk_sel = mpdr3 & 0x40;
316 pdf = (mpdr3 >> 16) & 0x3F;
317 ret_val = ((clk_sel != 0) ? mxc_get_main_clock(CPU_CLK) :
318 decode_pll(readl(&ccm->ppctl), MXC_HCLK)) / (pdf + 1);
321 clk_sel = mpdr3 & 0x400000;
322 pre_pdf = (mpdr3 >> 29) & 0x7;
323 pdf = (mpdr3 >> 23) & 0x3F;
324 ret_val = ((clk_sel != 0) ? mxc_get_main_clock(CPU_CLK) :
325 decode_pll(readl(&ccm->ppctl), MXC_HCLK)) /
326 ((pre_pdf + 1) * (pdf + 1));
329 printf("%s(): This clock: %d not supported yet\n",
337 unsigned int mxc_get_clock(enum mxc_clock clk)
341 return get_mcu_main_clk();
345 return get_ipg_clk();
348 return get_ipg_per_clk();
350 return imx_get_uartclk();
352 return mxc_get_peri_clock(ESDHC1_CLK);
354 return mxc_get_peri_clock(ESDHC2_CLK);
356 return mxc_get_peri_clock(ESDHC3_CLK);
358 return mxc_get_main_clock(USB_CLK);
360 return get_ipg_clk();
362 return get_ipg_clk();
367 #ifdef CONFIG_FEC_MXC
369 * The MX35 has no fuse for MAC, return a NULL MAC
371 void imx_get_mac_from_fuse(int dev_id, unsigned char *mac)
376 u32 imx_get_fecclk(void)
378 return mxc_get_clock(MXC_IPG_CLK);
382 int do_mx35_showclocks(cmd_tbl_t *cmdtp,
383 int flag, int argc, char * const argv[])
385 u32 cpufreq = get_mcu_main_clk();
386 printf("mx35 cpu clock: %dMHz\n", cpufreq / 1000000);
387 printf("ipg clock : %dHz\n", get_ipg_clk());
388 printf("ipg per clock : %dHz\n", get_ipg_per_clk());
389 printf("uart clock : %dHz\n", mxc_get_clock(MXC_UART_CLK));
395 clocks, CONFIG_SYS_MAXARGS, 1, do_mx35_showclocks,
400 #if defined(CONFIG_DISPLAY_CPUINFO)
401 static char *get_reset_cause(void)
403 /* read RCSR register from CCM module */
404 struct ccm_regs *ccm =
405 (struct ccm_regs *)IMX_CCM_BASE;
407 u32 cause = readl(&ccm->rcsr) & 0x0F;
419 return "unknown reset";
423 int print_cpuinfo(void)
425 u32 srev = get_cpu_rev();
427 printf("CPU: Freescale i.MX35 rev %d.%d at %d MHz.\n",
428 (srev & 0xF0) >> 4, (srev & 0x0F),
429 get_mcu_main_clk() / 1000000);
431 printf("Reset cause: %s\n", get_reset_cause());
438 * Initializes on-chip ethernet controllers.
439 * to override, implement board_eth_init()
441 int cpu_eth_init(bd_t *bis)
445 #if defined(CONFIG_FEC_MXC)
446 rc = fecmxc_initialize(bis);
452 #ifdef CONFIG_FSL_ESDHC_IMX
454 * Initializes on-chip MMC controllers.
455 * to override, implement board_mmc_init()
457 int cpu_mmc_init(bd_t *bis)
459 return fsl_esdhc_mmc_init(bis);
465 #ifdef CONFIG_FSL_ESDHC_IMX
466 #if CONFIG_SYS_FSL_ESDHC_ADDR == MMC_SDHC2_BASE_ADDR
467 gd->arch.sdhc_clk = mxc_get_clock(MXC_ESDHC2_CLK);
468 #elif CONFIG_SYS_FSL_ESDHC_ADDR == MMC_SDHC3_BASE_ADDR
469 gd->arch.sdhc_clk = mxc_get_clock(MXC_ESDHC3_CLK);
471 gd->arch.sdhc_clk = mxc_get_clock(MXC_ESDHC1_CLK);
477 #define RCSR_MEM_CTL_WEIM 0
478 #define RCSR_MEM_CTL_NAND 1
479 #define RCSR_MEM_CTL_ATA 2
480 #define RCSR_MEM_CTL_EXPANSION 3
481 #define RCSR_MEM_TYPE_NOR 0
482 #define RCSR_MEM_TYPE_ONENAND 2
483 #define RCSR_MEM_TYPE_SD 0
484 #define RCSR_MEM_TYPE_I2C 2
485 #define RCSR_MEM_TYPE_SPI 3
487 u32 spl_boot_device(void)
489 struct ccm_regs *ccm =
490 (struct ccm_regs *)IMX_CCM_BASE;
492 u32 rcsr = readl(&ccm->rcsr);
493 u32 mem_type, mem_ctl;
495 /* In external mode, no boot device is returned */
496 if ((rcsr >> 10) & 0x03)
497 return BOOT_DEVICE_NONE;
499 mem_ctl = (rcsr >> 25) & 0x03;
500 mem_type = (rcsr >> 23) & 0x03;
503 case RCSR_MEM_CTL_WEIM:
505 case RCSR_MEM_TYPE_NOR:
506 return BOOT_DEVICE_NOR;
507 case RCSR_MEM_TYPE_ONENAND:
508 return BOOT_DEVICE_ONENAND;
510 return BOOT_DEVICE_NONE;
512 case RCSR_MEM_CTL_NAND:
513 return BOOT_DEVICE_NAND;
514 case RCSR_MEM_CTL_EXPANSION:
516 case RCSR_MEM_TYPE_SD:
517 return BOOT_DEVICE_MMC1;
518 case RCSR_MEM_TYPE_I2C:
519 return BOOT_DEVICE_I2C;
520 case RCSR_MEM_TYPE_SPI:
521 return BOOT_DEVICE_SPI;
523 return BOOT_DEVICE_NONE;
527 return BOOT_DEVICE_NONE;