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 <asm/global_data.h>
17 #include <linux/errno.h>
18 #include <asm/arch/imx-regs.h>
19 #include <asm/arch/crm_regs.h>
20 #include <asm/arch/clock.h>
21 #include <asm/arch/sys_proto.h>
22 #ifdef CONFIG_FSL_ESDHC_IMX
23 #include <fsl_esdhc_imx.h>
28 #define CLK_CODE(arm, ahb, sel) (((arm) << 16) + ((ahb) << 8) + (sel))
29 #define CLK_CODE_ARM(c) (((c) >> 16) & 0xFF)
30 #define CLK_CODE_AHB(c) (((c) >> 8) & 0xFF)
31 #define CLK_CODE_PATH(c) ((c) & 0xFF)
33 #define CCM_GET_DIVIDER(x, m, o) (((x) & (m)) >> (o))
35 #ifdef CONFIG_FSL_ESDHC_IMX
36 DECLARE_GLOBAL_DATA_PTR;
39 static int g_clk_mux_auto[8] = {
40 CLK_CODE(1, 3, 0), CLK_CODE(1, 2, 1), CLK_CODE(2, 1, 1), -1,
41 CLK_CODE(1, 6, 0), CLK_CODE(1, 4, 1), CLK_CODE(2, 2, 1), -1,
44 static int g_clk_mux_consumer[16] = {
45 CLK_CODE(1, 4, 0), CLK_CODE(1, 3, 1), CLK_CODE(1, 3, 1), -1,
46 -1, -1, CLK_CODE(4, 1, 0), CLK_CODE(1, 5, 0),
47 CLK_CODE(1, 8, 1), CLK_CODE(1, 6, 1), CLK_CODE(2, 4, 0), -1,
48 -1, -1, CLK_CODE(4, 2, 0), -1,
51 static int hsp_div_table[3][16] = {
52 {4, 3, 2, -1, -1, -1, 1, 5, 4, 3, 2, -1, -1, -1, 1, -1},
53 {-1, -1, -1, -1, -1, -1, -1, -1, 8, 6, 4, -1, -1, -1, 2, -1},
54 {3, -1, -1, -1, -1, -1, -1, -1, 3, -1, -1, -1, -1, -1, -1, -1},
60 struct iim_regs *iim =
61 (struct iim_regs *)IIM_BASE_ADDR;
62 reg = readl(&iim->iim_srev);
64 reg = readw(ROMPATCH_REV);
70 return 0x35000 + (reg & 0xFF);
73 static u32 get_arm_div(u32 pdr0, u32 *fi, u32 *fd)
76 if (pdr0 & MXC_CCM_PDR0_AUTO_CON) {
77 pclk_mux = g_clk_mux_consumer +
78 ((pdr0 & MXC_CCM_PDR0_CON_MUX_DIV_MASK) >>
79 MXC_CCM_PDR0_CON_MUX_DIV_OFFSET);
81 pclk_mux = g_clk_mux_auto +
82 ((pdr0 & MXC_CCM_PDR0_AUTO_MUX_DIV_MASK) >>
83 MXC_CCM_PDR0_AUTO_MUX_DIV_OFFSET);
86 if ((*pclk_mux) == -1)
90 if (!CLK_CODE_PATH(*pclk_mux)) {
92 return CLK_CODE_ARM(*pclk_mux);
94 if (pdr0 & MXC_CCM_PDR0_AUTO_CON) {
102 return CLK_CODE_ARM(*pclk_mux);
105 static int get_ahb_div(u32 pdr0)
109 pclk_mux = g_clk_mux_consumer +
110 ((pdr0 & MXC_CCM_PDR0_CON_MUX_DIV_MASK) >>
111 MXC_CCM_PDR0_CON_MUX_DIV_OFFSET);
113 if ((*pclk_mux) == -1)
116 return CLK_CODE_AHB(*pclk_mux);
119 static u32 decode_pll(u32 reg, u32 infreq)
121 u32 mfi = (reg >> 10) & 0xf;
122 s32 mfn = reg & 0x3ff;
123 u32 mfd = (reg >> 16) & 0x3ff;
124 u32 pd = (reg >> 26) & 0xf;
126 mfi = mfi <= 5 ? 5 : mfi;
127 mfn = mfn >= 512 ? mfn - 1024 : mfn;
131 return lldiv(2 * (u64)infreq * (mfi * mfd + mfn),
135 static u32 get_mcu_main_clk(void)
137 u32 arm_div = 0, fi = 0, fd = 0;
138 struct ccm_regs *ccm =
139 (struct ccm_regs *)IMX_CCM_BASE;
140 arm_div = get_arm_div(readl(&ccm->pdr0), &fi, &fd);
141 fi *= decode_pll(readl(&ccm->mpctl), MXC_HCLK);
142 return fi / (arm_div * fd);
145 static u32 get_ipg_clk(void)
147 u32 freq = get_mcu_main_clk();
148 struct ccm_regs *ccm =
149 (struct ccm_regs *)IMX_CCM_BASE;
150 u32 pdr0 = readl(&ccm->pdr0);
152 return freq / (get_ahb_div(pdr0) * 2);
155 static u32 get_ipg_per_clk(void)
157 u32 freq = get_mcu_main_clk();
158 struct ccm_regs *ccm =
159 (struct ccm_regs *)IMX_CCM_BASE;
160 u32 pdr0 = readl(&ccm->pdr0);
161 u32 pdr4 = readl(&ccm->pdr4);
163 if (pdr0 & MXC_CCM_PDR0_PER_SEL) {
164 div = CCM_GET_DIVIDER(pdr4,
165 MXC_CCM_PDR4_PER0_PODF_MASK,
166 MXC_CCM_PDR4_PER0_PODF_OFFSET) + 1;
168 div = CCM_GET_DIVIDER(pdr0,
169 MXC_CCM_PDR0_PER_PODF_MASK,
170 MXC_CCM_PDR0_PER_PODF_OFFSET) + 1;
171 div *= get_ahb_div(pdr0);
176 u32 imx_get_uartclk(void)
179 struct ccm_regs *ccm =
180 (struct ccm_regs *)IMX_CCM_BASE;
181 u32 pdr4 = readl(&ccm->pdr4);
183 if (readl(&ccm->pdr3) & MXC_CCM_PDR3_UART_M_U)
184 freq = get_mcu_main_clk();
186 freq = decode_pll(readl(&ccm->ppctl), MXC_HCLK);
187 freq /= CCM_GET_DIVIDER(pdr4,
188 MXC_CCM_PDR4_UART_PODF_MASK,
189 MXC_CCM_PDR4_UART_PODF_OFFSET) + 1;
193 unsigned int mxc_get_main_clock(enum mxc_main_clock clk)
195 u32 nfc_pdf, hsp_podf;
196 u32 pll, ret_val = 0, usb_podf;
197 struct ccm_regs *ccm =
198 (struct ccm_regs *)IMX_CCM_BASE;
200 u32 reg = readl(&ccm->pdr0);
201 u32 reg4 = readl(&ccm->pdr4);
207 ret_val = get_mcu_main_clk();
210 ret_val = get_mcu_main_clk();
213 if (reg & CLKMODE_CONSUMER) {
214 hsp_podf = (reg >> 20) & 0x3;
215 pll = get_mcu_main_clk();
216 hsp_podf = hsp_div_table[hsp_podf][(reg>>16)&0xF];
218 ret_val = pll / hsp_podf;
220 puts("mismatch HSP with ARM clock setting\n");
224 ret_val = get_mcu_main_clk();
228 ret_val = get_ipg_clk();
231 ret_val = get_ipg_per_clk();
234 nfc_pdf = (reg4 >> 28) & 0xF;
235 pll = get_mcu_main_clk();
237 ret_val = pll / (nfc_pdf + 1);
240 usb_podf = (reg4 >> 22) & 0x3F;
242 pll = get_mcu_main_clk();
244 pll = decode_pll(readl(&ccm->ppctl), MXC_HCLK);
246 ret_val = pll / (usb_podf + 1);
249 printf("Unknown clock: %d\n", clk);
255 unsigned int mxc_get_peri_clock(enum mxc_peri_clock clk)
257 u32 ret_val = 0, pdf, pre_pdf, clk_sel;
258 struct ccm_regs *ccm =
259 (struct ccm_regs *)IMX_CCM_BASE;
260 u32 mpdr2 = readl(&ccm->pdr2);
261 u32 mpdr3 = readl(&ccm->pdr3);
262 u32 mpdr4 = readl(&ccm->pdr4);
268 clk_sel = mpdr3 & (1 << 14);
269 pdf = (mpdr4 >> 10) & 0x3F;
270 ret_val = ((clk_sel != 0) ? mxc_get_main_clock(CPU_CLK) :
271 decode_pll(readl(&ccm->ppctl), MXC_HCLK)) / (pdf + 1);
274 pre_pdf = (mpdr2 >> 24) & 0x7;
276 clk_sel = mpdr2 & (1 << 6);
277 ret_val = ((clk_sel != 0) ? mxc_get_main_clock(CPU_CLK) :
278 decode_pll(readl(&ccm->ppctl), MXC_HCLK)) /
279 ((pre_pdf + 1) * (pdf + 1));
282 pre_pdf = (mpdr2 >> 27) & 0x7;
283 pdf = (mpdr2 >> 8) & 0x3F;
284 clk_sel = mpdr2 & (1 << 6);
285 ret_val = ((clk_sel != 0) ? mxc_get_main_clock(CPU_CLK) :
286 decode_pll(readl(&ccm->ppctl), MXC_HCLK)) /
287 ((pre_pdf + 1) * (pdf + 1));
290 clk_sel = mpdr2 & (1 << 7);
291 pdf = (mpdr2 >> 16) & 0x3F;
292 ret_val = ((clk_sel != 0) ? mxc_get_main_clock(CPU_CLK) :
293 decode_pll(readl(&ccm->ppctl), MXC_HCLK)) / (pdf + 1);
296 pre_pdf = readl(&ccm->pdr1);
297 clk_sel = (pre_pdf & 0x80);
298 pdf = (pre_pdf >> 22) & 0x3F;
299 pre_pdf = (pre_pdf >> 28) & 0x7;
300 ret_val = ((clk_sel != 0) ? mxc_get_main_clock(CPU_CLK) :
301 decode_pll(readl(&ccm->ppctl), MXC_HCLK)) /
302 ((pre_pdf + 1) * (pdf + 1));
305 clk_sel = mpdr3 & 0x40;
307 ret_val = ((clk_sel != 0) ? mxc_get_main_clock(CPU_CLK) :
308 decode_pll(readl(&ccm->ppctl), MXC_HCLK)) / (pdf + 1);
311 clk_sel = mpdr3 & 0x40;
312 pdf = (mpdr3 >> 8) & 0x3F;
313 ret_val = ((clk_sel != 0) ? mxc_get_main_clock(CPU_CLK) :
314 decode_pll(readl(&ccm->ppctl), MXC_HCLK)) / (pdf + 1);
317 clk_sel = mpdr3 & 0x40;
318 pdf = (mpdr3 >> 16) & 0x3F;
319 ret_val = ((clk_sel != 0) ? mxc_get_main_clock(CPU_CLK) :
320 decode_pll(readl(&ccm->ppctl), MXC_HCLK)) / (pdf + 1);
323 clk_sel = mpdr3 & 0x400000;
324 pre_pdf = (mpdr3 >> 29) & 0x7;
325 pdf = (mpdr3 >> 23) & 0x3F;
326 ret_val = ((clk_sel != 0) ? mxc_get_main_clock(CPU_CLK) :
327 decode_pll(readl(&ccm->ppctl), MXC_HCLK)) /
328 ((pre_pdf + 1) * (pdf + 1));
331 printf("%s(): This clock: %d not supported yet\n",
339 unsigned int mxc_get_clock(enum mxc_clock clk)
343 return get_mcu_main_clk();
347 return get_ipg_clk();
350 return get_ipg_per_clk();
352 return imx_get_uartclk();
354 return mxc_get_peri_clock(ESDHC1_CLK);
356 return mxc_get_peri_clock(ESDHC2_CLK);
358 return mxc_get_peri_clock(ESDHC3_CLK);
360 return mxc_get_main_clock(USB_CLK);
362 return get_ipg_clk();
364 return get_ipg_clk();
369 #ifdef CONFIG_FEC_MXC
371 * The MX35 has no fuse for MAC, return a NULL MAC
373 void imx_get_mac_from_fuse(int dev_id, unsigned char *mac)
378 u32 imx_get_fecclk(void)
380 return mxc_get_clock(MXC_IPG_CLK);
384 int do_mx35_showclocks(struct cmd_tbl *cmdtp, int flag, int argc,
387 u32 cpufreq = get_mcu_main_clk();
388 printf("mx35 cpu clock: %dMHz\n", cpufreq / 1000000);
389 printf("ipg clock : %dHz\n", get_ipg_clk());
390 printf("ipg per clock : %dHz\n", get_ipg_per_clk());
391 printf("uart clock : %dHz\n", mxc_get_clock(MXC_UART_CLK));
397 clocks, CONFIG_SYS_MAXARGS, 1, do_mx35_showclocks,
402 #if defined(CONFIG_DISPLAY_CPUINFO)
403 static char *get_reset_cause(void)
405 /* read RCSR register from CCM module */
406 struct ccm_regs *ccm =
407 (struct ccm_regs *)IMX_CCM_BASE;
409 u32 cause = readl(&ccm->rcsr) & 0x0F;
421 return "unknown reset";
425 int print_cpuinfo(void)
427 u32 srev = get_cpu_rev();
429 printf("CPU: Freescale i.MX35 rev %d.%d at %d MHz.\n",
430 (srev & 0xF0) >> 4, (srev & 0x0F),
431 get_mcu_main_clk() / 1000000);
433 printf("Reset cause: %s\n", get_reset_cause());
440 * Initializes on-chip ethernet controllers.
441 * to override, implement board_eth_init()
443 int cpu_eth_init(struct bd_info *bis)
447 #if defined(CONFIG_FEC_MXC)
448 rc = fecmxc_initialize(bis);
454 #ifdef CONFIG_FSL_ESDHC_IMX
456 * Initializes on-chip MMC controllers.
457 * to override, implement board_mmc_init()
459 int cpu_mmc_init(struct bd_info *bis)
461 return fsl_esdhc_mmc_init(bis);
467 #ifdef CONFIG_FSL_ESDHC_IMX
468 #if CONFIG_SYS_FSL_ESDHC_ADDR == MMC_SDHC2_BASE_ADDR
469 gd->arch.sdhc_clk = mxc_get_clock(MXC_ESDHC2_CLK);
470 #elif CONFIG_SYS_FSL_ESDHC_ADDR == MMC_SDHC3_BASE_ADDR
471 gd->arch.sdhc_clk = mxc_get_clock(MXC_ESDHC3_CLK);
473 gd->arch.sdhc_clk = mxc_get_clock(MXC_ESDHC1_CLK);
479 #define RCSR_MEM_CTL_WEIM 0
480 #define RCSR_MEM_CTL_NAND 1
481 #define RCSR_MEM_CTL_ATA 2
482 #define RCSR_MEM_CTL_EXPANSION 3
483 #define RCSR_MEM_TYPE_NOR 0
484 #define RCSR_MEM_TYPE_ONENAND 2
485 #define RCSR_MEM_TYPE_SD 0
486 #define RCSR_MEM_TYPE_I2C 2
487 #define RCSR_MEM_TYPE_SPI 3
489 u32 spl_boot_device(void)
491 struct ccm_regs *ccm =
492 (struct ccm_regs *)IMX_CCM_BASE;
494 u32 rcsr = readl(&ccm->rcsr);
495 u32 mem_type, mem_ctl;
497 /* In external mode, no boot device is returned */
498 if ((rcsr >> 10) & 0x03)
499 return BOOT_DEVICE_NONE;
501 mem_ctl = (rcsr >> 25) & 0x03;
502 mem_type = (rcsr >> 23) & 0x03;
505 case RCSR_MEM_CTL_WEIM:
507 case RCSR_MEM_TYPE_NOR:
508 return BOOT_DEVICE_NOR;
509 case RCSR_MEM_TYPE_ONENAND:
510 return BOOT_DEVICE_ONENAND;
512 return BOOT_DEVICE_NONE;
514 case RCSR_MEM_CTL_NAND:
515 return BOOT_DEVICE_NAND;
516 case RCSR_MEM_CTL_EXPANSION:
518 case RCSR_MEM_TYPE_SD:
519 return BOOT_DEVICE_MMC1;
520 case RCSR_MEM_TYPE_I2C:
521 return BOOT_DEVICE_I2C;
522 case RCSR_MEM_TYPE_SPI:
523 return BOOT_DEVICE_SPI;
525 return BOOT_DEVICE_NONE;
529 return BOOT_DEVICE_NONE;