1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3 * (C) Copyright 2007
4 * Sascha Hauer, Pengutronix
5 *
6 * (C) Copyright 2008-2010 Freescale Semiconductor, Inc.
7 */
8
9 #include <common.h>
10 #include <clock_legacy.h>
11 #include <command.h>
12 #include <div64.h>
13 #include <init.h>
14 #include <net.h>
15 #include <asm/global_data.h>
16 #include <asm/io.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>
24 #endif
25 #include <netdev.h>
26 #include <spl.h>
27
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)
32
33 #define CCM_GET_DIVIDER(x, m, o) (((x) & (m)) >> (o))
34
35 #ifdef CONFIG_FSL_ESDHC_IMX
36 DECLARE_GLOBAL_DATA_PTR;
37 #endif
38
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,
42 };
43
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,
49 };
50
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},
55 };
56
get_cpu_rev(void)57 u32 get_cpu_rev(void)
58 {
59 int reg;
60 struct iim_regs *iim =
61 (struct iim_regs *)IIM_BASE_ADDR;
62 reg = readl(&iim->iim_srev);
63 if (!reg) {
64 reg = readw(ROMPATCH_REV);
65 reg <<= 4;
66 } else {
67 reg += CHIP_REV_1_0;
68 }
69
70 return 0x35000 + (reg & 0xFF);
71 }
72
get_arm_div(u32 pdr0,u32 * fi,u32 * fd)73 static u32 get_arm_div(u32 pdr0, u32 *fi, u32 *fd)
74 {
75 int *pclk_mux;
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);
80 } else {
81 pclk_mux = g_clk_mux_auto +
82 ((pdr0 & MXC_CCM_PDR0_AUTO_MUX_DIV_MASK) >>
83 MXC_CCM_PDR0_AUTO_MUX_DIV_OFFSET);
84 }
85
86 if ((*pclk_mux) == -1)
87 return -1;
88
89 if (fi && fd) {
90 if (!CLK_CODE_PATH(*pclk_mux)) {
91 *fi = *fd = 1;
92 return CLK_CODE_ARM(*pclk_mux);
93 }
94 if (pdr0 & MXC_CCM_PDR0_AUTO_CON) {
95 *fi = 3;
96 *fd = 4;
97 } else {
98 *fi = 2;
99 *fd = 3;
100 }
101 }
102 return CLK_CODE_ARM(*pclk_mux);
103 }
104
get_ahb_div(u32 pdr0)105 static int get_ahb_div(u32 pdr0)
106 {
107 int *pclk_mux;
108
109 pclk_mux = g_clk_mux_consumer +
110 ((pdr0 & MXC_CCM_PDR0_CON_MUX_DIV_MASK) >>
111 MXC_CCM_PDR0_CON_MUX_DIV_OFFSET);
112
113 if ((*pclk_mux) == -1)
114 return -1;
115
116 return CLK_CODE_AHB(*pclk_mux);
117 }
118
decode_pll(u32 reg,u32 infreq)119 static u32 decode_pll(u32 reg, u32 infreq)
120 {
121 u32 mfi = (reg >> 10) & 0xf;
122 s32 mfn = reg & 0x3ff;
123 u32 mfd = (reg >> 16) & 0x3ff;
124 u32 pd = (reg >> 26) & 0xf;
125
126 mfi = mfi <= 5 ? 5 : mfi;
127 mfn = mfn >= 512 ? mfn - 1024 : mfn;
128 mfd += 1;
129 pd += 1;
130
131 return lldiv(2 * (u64)infreq * (mfi * mfd + mfn),
132 mfd * pd);
133 }
134
get_mcu_main_clk(void)135 static u32 get_mcu_main_clk(void)
136 {
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);
143 }
144
get_ipg_clk(void)145 static u32 get_ipg_clk(void)
146 {
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);
151
152 return freq / (get_ahb_div(pdr0) * 2);
153 }
154
get_ipg_per_clk(void)155 static u32 get_ipg_per_clk(void)
156 {
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);
162 u32 div;
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;
167 } else {
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);
172 }
173 return freq / div;
174 }
175
imx_get_uartclk(void)176 u32 imx_get_uartclk(void)
177 {
178 u32 freq;
179 struct ccm_regs *ccm =
180 (struct ccm_regs *)IMX_CCM_BASE;
181 u32 pdr4 = readl(&ccm->pdr4);
182
183 if (readl(&ccm->pdr3) & MXC_CCM_PDR3_UART_M_U)
184 freq = get_mcu_main_clk();
185 else
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;
190 return freq;
191 }
192
mxc_get_main_clock(enum mxc_main_clock clk)193 unsigned int mxc_get_main_clock(enum mxc_main_clock clk)
194 {
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;
199
200 u32 reg = readl(&ccm->pdr0);
201 u32 reg4 = readl(&ccm->pdr4);
202
203 reg |= 0x1;
204
205 switch (clk) {
206 case CPU_CLK:
207 ret_val = get_mcu_main_clk();
208 break;
209 case AHB_CLK:
210 ret_val = get_mcu_main_clk();
211 break;
212 case HSP_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];
217 if (hsp_podf > 0) {
218 ret_val = pll / hsp_podf;
219 } else {
220 puts("mismatch HSP with ARM clock setting\n");
221 ret_val = 0;
222 }
223 } else {
224 ret_val = get_mcu_main_clk();
225 }
226 break;
227 case IPG_CLK:
228 ret_val = get_ipg_clk();
229 break;
230 case IPG_PER_CLK:
231 ret_val = get_ipg_per_clk();
232 break;
233 case NFC_CLK:
234 nfc_pdf = (reg4 >> 28) & 0xF;
235 pll = get_mcu_main_clk();
236 /* AHB/nfc_pdf */
237 ret_val = pll / (nfc_pdf + 1);
238 break;
239 case USB_CLK:
240 usb_podf = (reg4 >> 22) & 0x3F;
241 if (reg4 & 0x200)
242 pll = get_mcu_main_clk();
243 else
244 pll = decode_pll(readl(&ccm->ppctl), MXC_HCLK);
245
246 ret_val = pll / (usb_podf + 1);
247 break;
248 default:
249 printf("Unknown clock: %d\n", clk);
250 break;
251 }
252
253 return ret_val;
254 }
mxc_get_peri_clock(enum mxc_peri_clock clk)255 unsigned int mxc_get_peri_clock(enum mxc_peri_clock clk)
256 {
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);
263
264 switch (clk) {
265 case UART1_BAUD:
266 case UART2_BAUD:
267 case UART3_BAUD:
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);
272 break;
273 case SSI1_BAUD:
274 pre_pdf = (mpdr2 >> 24) & 0x7;
275 pdf = mpdr2 & 0x3F;
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));
280 break;
281 case SSI2_BAUD:
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));
288 break;
289 case CSI_BAUD:
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);
294 break;
295 case MSHC_CLK:
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));
303 break;
304 case ESDHC1_CLK:
305 clk_sel = mpdr3 & 0x40;
306 pdf = mpdr3 & 0x3F;
307 ret_val = ((clk_sel != 0) ? mxc_get_main_clock(CPU_CLK) :
308 decode_pll(readl(&ccm->ppctl), MXC_HCLK)) / (pdf + 1);
309 break;
310 case ESDHC2_CLK:
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);
315 break;
316 case ESDHC3_CLK:
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);
321 break;
322 case SPDIF_CLK:
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));
329 break;
330 default:
331 printf("%s(): This clock: %d not supported yet\n",
332 __func__, clk);
333 break;
334 }
335
336 return ret_val;
337 }
338
mxc_get_clock(enum mxc_clock clk)339 unsigned int mxc_get_clock(enum mxc_clock clk)
340 {
341 switch (clk) {
342 case MXC_ARM_CLK:
343 return get_mcu_main_clk();
344 case MXC_AHB_CLK:
345 break;
346 case MXC_IPG_CLK:
347 return get_ipg_clk();
348 case MXC_IPG_PERCLK:
349 case MXC_I2C_CLK:
350 return get_ipg_per_clk();
351 case MXC_UART_CLK:
352 return imx_get_uartclk();
353 case MXC_ESDHC1_CLK:
354 return mxc_get_peri_clock(ESDHC1_CLK);
355 case MXC_ESDHC2_CLK:
356 return mxc_get_peri_clock(ESDHC2_CLK);
357 case MXC_ESDHC3_CLK:
358 return mxc_get_peri_clock(ESDHC3_CLK);
359 case MXC_USB_CLK:
360 return mxc_get_main_clock(USB_CLK);
361 case MXC_FEC_CLK:
362 return get_ipg_clk();
363 case MXC_CSPI_CLK:
364 return get_ipg_clk();
365 }
366 return -1;
367 }
368
369 #ifdef CONFIG_FEC_MXC
370 /*
371 * The MX35 has no fuse for MAC, return a NULL MAC
372 */
imx_get_mac_from_fuse(int dev_id,unsigned char * mac)373 void imx_get_mac_from_fuse(int dev_id, unsigned char *mac)
374 {
375 memset(mac, 0, 6);
376 }
377
imx_get_fecclk(void)378 u32 imx_get_fecclk(void)
379 {
380 return mxc_get_clock(MXC_IPG_CLK);
381 }
382 #endif
383
do_mx35_showclocks(struct cmd_tbl * cmdtp,int flag,int argc,char * const argv[])384 int do_mx35_showclocks(struct cmd_tbl *cmdtp, int flag, int argc,
385 char *const argv[])
386 {
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));
392
393 return 0;
394 }
395
396 U_BOOT_CMD(
397 clocks, CONFIG_SYS_MAXARGS, 1, do_mx35_showclocks,
398 "display clocks",
399 ""
400 );
401
402 #if defined(CONFIG_DISPLAY_CPUINFO)
get_reset_cause(void)403 static char *get_reset_cause(void)
404 {
405 /* read RCSR register from CCM module */
406 struct ccm_regs *ccm =
407 (struct ccm_regs *)IMX_CCM_BASE;
408
409 u32 cause = readl(&ccm->rcsr) & 0x0F;
410
411 switch (cause) {
412 case 0x0000:
413 return "POR";
414 case 0x0002:
415 return "JTAG";
416 case 0x0004:
417 return "RST";
418 case 0x0008:
419 return "WDOG";
420 default:
421 return "unknown reset";
422 }
423 }
424
print_cpuinfo(void)425 int print_cpuinfo(void)
426 {
427 u32 srev = get_cpu_rev();
428
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);
432
433 printf("Reset cause: %s\n", get_reset_cause());
434
435 return 0;
436 }
437 #endif
438
439 /*
440 * Initializes on-chip ethernet controllers.
441 * to override, implement board_eth_init()
442 */
cpu_eth_init(struct bd_info * bis)443 int cpu_eth_init(struct bd_info *bis)
444 {
445 int rc = -ENODEV;
446
447 #if defined(CONFIG_FEC_MXC)
448 rc = fecmxc_initialize(bis);
449 #endif
450
451 return rc;
452 }
453
454 #ifdef CONFIG_FSL_ESDHC_IMX
455 /*
456 * Initializes on-chip MMC controllers.
457 * to override, implement board_mmc_init()
458 */
cpu_mmc_init(struct bd_info * bis)459 int cpu_mmc_init(struct bd_info *bis)
460 {
461 return fsl_esdhc_mmc_init(bis);
462 }
463 #endif
464
get_clocks(void)465 int get_clocks(void)
466 {
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);
472 #else
473 gd->arch.sdhc_clk = mxc_get_clock(MXC_ESDHC1_CLK);
474 #endif
475 #endif
476 return 0;
477 }
478
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
488
spl_boot_device(void)489 u32 spl_boot_device(void)
490 {
491 struct ccm_regs *ccm =
492 (struct ccm_regs *)IMX_CCM_BASE;
493
494 u32 rcsr = readl(&ccm->rcsr);
495 u32 mem_type, mem_ctl;
496
497 /* In external mode, no boot device is returned */
498 if ((rcsr >> 10) & 0x03)
499 return BOOT_DEVICE_NONE;
500
501 mem_ctl = (rcsr >> 25) & 0x03;
502 mem_type = (rcsr >> 23) & 0x03;
503
504 switch (mem_ctl) {
505 case RCSR_MEM_CTL_WEIM:
506 switch (mem_type) {
507 case RCSR_MEM_TYPE_NOR:
508 return BOOT_DEVICE_NOR;
509 case RCSR_MEM_TYPE_ONENAND:
510 return BOOT_DEVICE_ONENAND;
511 default:
512 return BOOT_DEVICE_NONE;
513 }
514 case RCSR_MEM_CTL_NAND:
515 return BOOT_DEVICE_NAND;
516 case RCSR_MEM_CTL_EXPANSION:
517 switch (mem_type) {
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;
524 default:
525 return BOOT_DEVICE_NONE;
526 }
527 }
528
529 return BOOT_DEVICE_NONE;
530 }
531