3 * Sascha Hauer, Pengutronix
5 * (C) Copyright 2009 Freescale Semiconductor, Inc.
7 * SPDX-License-Identifier: GPL-2.0+
11 #include <linux/errno.h>
13 #include <asm/arch/imx-regs.h>
14 #include <asm/arch/clock.h>
15 #include <asm/arch/sys_proto.h>
16 #include <asm/mach-imx/boot_mode.h>
17 #include <asm/mach-imx/dma.h>
18 #include <asm/mach-imx/hab.h>
20 #include <asm/arch/mxc_hdmi.h>
21 #include <asm/arch/crm_regs.h>
23 #include <imx_thermal.h>
40 #if defined(CONFIG_IMX_THERMAL)
41 static const struct imx_thermal_plat imx6_thermal_plat = {
42 .regs = (void *)ANATOP_BASE_ADDR,
47 U_BOOT_DEVICE(imx6_thermal) = {
48 .name = "imx_thermal",
49 .platdata = &imx6_thermal_plat,
53 #if defined(CONFIG_SECURE_BOOT)
54 struct imx_sec_config_fuse_t const imx_sec_config_fuse = {
62 struct scu_regs *scu = (struct scu_regs *)SCU_BASE_ADDR;
63 return readl(&scu->config) & 3;
68 struct anatop_regs *anatop = (struct anatop_regs *)ANATOP_BASE_ADDR;
69 u32 reg = readl(&anatop->digprog_sololite);
70 u32 type = ((reg >> 16) & 0xff);
73 if (type != MXC_CPU_MX6SL) {
74 reg = readl(&anatop->digprog);
75 struct scu_regs *scu = (struct scu_regs *)SCU_BASE_ADDR;
76 cfg = readl(&scu->config) & 3;
77 type = ((reg >> 16) & 0xff);
78 if (type == MXC_CPU_MX6DL) {
80 type = MXC_CPU_MX6SOLO;
83 if (type == MXC_CPU_MX6Q) {
89 major = ((reg >> 8) & 0xff);
91 ((type == MXC_CPU_MX6Q) || (type == MXC_CPU_MX6D))) {
97 reg &= 0xff; /* mx6 silicon revision */
98 return (type << 12) | (reg + (0x10 * (major + 1)));
102 * OCOTP_CFG3[17:16] (see Fusemap Description Table offset 0x440)
103 * defines a 2-bit SPEED_GRADING
105 #define OCOTP_CFG3_SPEED_SHIFT 16
106 #define OCOTP_CFG3_SPEED_800MHZ 0
107 #define OCOTP_CFG3_SPEED_850MHZ 1
108 #define OCOTP_CFG3_SPEED_1GHZ 2
109 #define OCOTP_CFG3_SPEED_1P2GHZ 3
114 #define OCOTP_CFG3_SPEED_528MHZ 1
115 #define OCOTP_CFG3_SPEED_696MHZ 2
120 #define OCOTP_CFG3_SPEED_792MHZ 2
121 #define OCOTP_CFG3_SPEED_900MHZ 3
123 u32 get_cpu_speed_grade_hz(void)
125 struct ocotp_regs *ocotp = (struct ocotp_regs *)OCOTP_BASE_ADDR;
126 struct fuse_bank *bank = &ocotp->bank[0];
127 struct fuse_bank0_regs *fuse =
128 (struct fuse_bank0_regs *)bank->fuse_regs;
131 val = readl(&fuse->cfg3);
132 val >>= OCOTP_CFG3_SPEED_SHIFT;
136 if (val == OCOTP_CFG3_SPEED_528MHZ)
138 else if (val == OCOTP_CFG3_SPEED_696MHZ)
145 if (val == OCOTP_CFG3_SPEED_528MHZ)
147 else if (val == OCOTP_CFG3_SPEED_792MHZ)
149 else if (val == OCOTP_CFG3_SPEED_900MHZ)
156 /* Valid for IMX6DQ */
157 case OCOTP_CFG3_SPEED_1P2GHZ:
158 if (is_mx6dq() || is_mx6dqp())
160 /* Valid for IMX6SX/IMX6SDL/IMX6DQ */
161 case OCOTP_CFG3_SPEED_1GHZ:
163 /* Valid for IMX6DQ */
164 case OCOTP_CFG3_SPEED_850MHZ:
165 if (is_mx6dq() || is_mx6dqp())
167 /* Valid for IMX6SX/IMX6SDL/IMX6DQ */
168 case OCOTP_CFG3_SPEED_800MHZ:
175 * OCOTP_MEM0[7:6] (see Fusemap Description Table offset 0x480)
176 * defines a 2-bit Temperature Grade
178 * return temperature grade and min/max temperature in Celsius
180 #define OCOTP_MEM0_TEMP_SHIFT 6
182 u32 get_cpu_temp_grade(int *minc, int *maxc)
184 struct ocotp_regs *ocotp = (struct ocotp_regs *)OCOTP_BASE_ADDR;
185 struct fuse_bank *bank = &ocotp->bank[1];
186 struct fuse_bank1_regs *fuse =
187 (struct fuse_bank1_regs *)bank->fuse_regs;
190 val = readl(&fuse->mem0);
191 val >>= OCOTP_MEM0_TEMP_SHIFT;
195 if (val == TEMP_AUTOMOTIVE) {
198 } else if (val == TEMP_INDUSTRIAL) {
201 } else if (val == TEMP_EXTCOMMERCIAL) {
212 #ifdef CONFIG_REVISION_TAG
213 u32 __weak get_board_rev(void)
215 u32 cpurev = get_cpu_rev();
216 u32 type = ((cpurev >> 12) & 0xff);
217 if (type == MXC_CPU_MX6SOLO)
218 cpurev = (MXC_CPU_MX6DL) << 12 | (cpurev & 0xFFF);
220 if (type == MXC_CPU_MX6D)
221 cpurev = (MXC_CPU_MX6Q) << 12 | (cpurev & 0xFFF);
227 static void clear_ldo_ramp(void)
229 struct anatop_regs *anatop = (struct anatop_regs *)ANATOP_BASE_ADDR;
232 /* ROM may modify LDO ramp up time according to fuse setting, so in
233 * order to be in the safe side we neeed to reset these settings to
234 * match the reset value: 0'b00
236 reg = readl(&anatop->ana_misc2);
237 reg &= ~(0x3f << 24);
238 writel(reg, &anatop->ana_misc2);
242 * Set the PMU_REG_CORE register
244 * Set LDO_SOC/PU/ARM regulators to the specified millivolt level.
245 * Possible values are from 0.725V to 1.450V in steps of
248 static int set_ldo_voltage(enum ldo_reg ldo, u32 mv)
250 struct anatop_regs *anatop = (struct anatop_regs *)ANATOP_BASE_ADDR;
251 u32 val, step, old, reg = readl(&anatop->reg_core);
254 /* No LDO_SOC/PU/ARM */
259 val = 0x00; /* Power gated off */
261 val = 0x1F; /* Power FET switched full on. No regulation */
263 val = (mv - 700) / 25;
281 old = (reg & (0x1F << shift)) >> shift;
282 step = abs(val - old);
286 reg = (reg & ~(0x1F << shift)) | (val << shift);
287 writel(reg, &anatop->reg_core);
290 * The LDO ramp-up is based on 64 clock cycles of 24 MHz = 2.6 us per
298 static void set_ahb_rate(u32 val)
300 struct mxc_ccm_reg *mxc_ccm = (struct mxc_ccm_reg *)CCM_BASE_ADDR;
303 div = get_periph_clk() / val - 1;
304 reg = readl(&mxc_ccm->cbcdr);
306 writel((reg & (~MXC_CCM_CBCDR_AHB_PODF_MASK)) |
307 (div << MXC_CCM_CBCDR_AHB_PODF_OFFSET), &mxc_ccm->cbcdr);
310 static void clear_mmdc_ch_mask(void)
312 struct mxc_ccm_reg *mxc_ccm = (struct mxc_ccm_reg *)CCM_BASE_ADDR;
314 reg = readl(&mxc_ccm->ccdr);
316 /* Clear MMDC channel mask */
317 if (is_mx6sx() || is_mx6ul() || is_mx6ull() || is_mx6sl() || is_mx6sll())
318 reg &= ~(MXC_CCM_CCDR_MMDC_CH1_HS_MASK);
320 reg &= ~(MXC_CCM_CCDR_MMDC_CH1_HS_MASK | MXC_CCM_CCDR_MMDC_CH0_HS_MASK);
321 writel(reg, &mxc_ccm->ccdr);
324 #define OCOTP_MEM0_REFTOP_TRIM_SHIFT 8
326 static void init_bandgap(void)
328 struct anatop_regs *anatop = (struct anatop_regs *)ANATOP_BASE_ADDR;
329 struct ocotp_regs *ocotp = (struct ocotp_regs *)OCOTP_BASE_ADDR;
330 struct fuse_bank *bank = &ocotp->bank[1];
331 struct fuse_bank1_regs *fuse =
332 (struct fuse_bank1_regs *)bank->fuse_regs;
336 * Ensure the bandgap has stabilized.
338 while (!(readl(&anatop->ana_misc0) & 0x80))
341 * For best noise performance of the analog blocks using the
342 * outputs of the bandgap, the reftop_selfbiasoff bit should
345 writel(BM_ANADIG_ANA_MISC0_REFTOP_SELBIASOFF, &anatop->ana_misc0_set);
347 * On i.MX6ULL,we need to set VBGADJ bits according to the
348 * REFTOP_TRIM[3:0] in fuse table
349 * 000 - set REFTOP_VBGADJ[2:0] to 3b'110,
350 * 110 - set REFTOP_VBGADJ[2:0] to 3b'000,
351 * 001 - set REFTOP_VBGADJ[2:0] to 3b'001,
352 * 010 - set REFTOP_VBGADJ[2:0] to 3b'010,
353 * 011 - set REFTOP_VBGADJ[2:0] to 3b'011,
354 * 100 - set REFTOP_VBGADJ[2:0] to 3b'100,
355 * 101 - set REFTOP_VBGADJ[2:0] to 3b'101,
356 * 111 - set REFTOP_VBGADJ[2:0] to 3b'111,
359 val = readl(&fuse->mem0);
360 val >>= OCOTP_MEM0_REFTOP_TRIM_SHIFT;
363 writel(val << BM_ANADIG_ANA_MISC0_REFTOP_VBGADJ_SHIFT,
364 &anatop->ana_misc0_set);
369 static void set_preclk_from_osc(void)
371 struct mxc_ccm_reg *mxc_ccm = (struct mxc_ccm_reg *)CCM_BASE_ADDR;
374 reg = readl(&mxc_ccm->cscmr1);
375 reg |= MXC_CCM_CSCMR1_PER_CLK_SEL_MASK;
376 writel(reg, &mxc_ccm->cscmr1);
380 int arch_cpu_init(void)
382 struct mxc_ccm_reg *ccm = (struct mxc_ccm_reg *)CCM_BASE_ADDR;
386 /* Need to clear MMDC_CHx_MASK to make warm reset work. */
387 clear_mmdc_ch_mask();
390 * Disable self-bias circuit in the analog bandap.
391 * The self-bias circuit is used by the bandgap during startup.
392 * This bit should be set after the bandgap has initialized.
396 if (!is_mx6ul() && !is_mx6ull()) {
398 * When low freq boot is enabled, ROM will not set AHB
399 * freq, so we need to ensure AHB freq is 132MHz in such
402 * To i.MX6UL, when power up, default ARM core and
403 * AHB rate is 396M and 132M.
405 if (mxc_get_clock(MXC_ARM_CLK) == 396000000)
406 set_ahb_rate(132000000);
410 if (is_soc_rev(CHIP_REV_1_0) == 0) {
412 * According to the design team's requirement on
413 * i.MX6UL,the PMIC_STBY_REQ PAD should be configured
414 * as open drain 100K (0x0000b8a0).
415 * Only exists on TO1.0
417 writel(0x0000b8a0, IOMUXC_BASE_ADDR + 0x29c);
420 * From TO1.1, SNVS adds internal pull up control
421 * for POR_B, the register filed is GPBIT[1:0],
422 * after system boot up, it can be set to 2b'01
423 * to disable internal pull up.It can save about
424 * 30uA power in SNVS mode.
426 writel((readl(MX6UL_SNVS_LP_BASE_ADDR + 0x10) &
428 MX6UL_SNVS_LP_BASE_ADDR + 0x10);
434 * GPBIT[1:0] is suggested to set to 2'b11:
435 * 2'b00 : always PUP100K
436 * 2'b01 : PUP100K when PMIC_ON_REQ or SOC_NOT_FAIL
437 * 2'b10 : always disable PUP100K
438 * 2'b11 : PDN100K when SOC_FAIL, PUP100K when SOC_NOT_FAIL
439 * register offset is different from i.MX6UL, since
440 * i.MX6UL is fixed by ECO.
442 writel(readl(MX6UL_SNVS_LP_BASE_ADDR) |
443 0x3, MX6UL_SNVS_LP_BASE_ADDR);
446 /* Set perclk to source from OSC 24MHz */
447 #if defined(CONFIG_MX6SL)
448 set_preclk_from_osc();
451 imx_set_wdog_powerdown(false); /* Disable PDE bit of WMCR register */
454 setbits_le32(&ccm->cscdr1, MXC_CCM_CSCDR1_UART_CLK_SEL);
461 #ifdef CONFIG_ENV_IS_IN_MMC
462 __weak int board_mmc_get_env_dev(int devno)
464 return CONFIG_SYS_MMC_ENV_DEV;
467 static int mmc_get_boot_dev(void)
469 struct src *src_regs = (struct src *)SRC_BASE_ADDR;
470 u32 soc_sbmr = readl(&src_regs->sbmr1);
476 * "i.MX 6Dual/6Quad Applications Processor Reference Manual"
477 * Chapter "8.5.3.1 Expansion Device eFUSE Configuration"
478 * i.MX6SL/SX/UL has same layout.
480 bootsel = (soc_sbmr & 0x000000FF) >> 6;
482 /* No boot from sd/mmc */
486 /* BOOT_CFG2[3] and BOOT_CFG2[4] */
487 devno = (soc_sbmr & 0x00001800) >> 11;
492 int mmc_get_env_dev(void)
494 int devno = mmc_get_boot_dev();
496 /* If not boot from sd/mmc, use default value */
498 return CONFIG_SYS_MMC_ENV_DEV;
500 return board_mmc_get_env_dev(devno);
503 #ifdef CONFIG_SYS_MMC_ENV_PART
504 __weak int board_mmc_get_env_part(int devno)
506 return CONFIG_SYS_MMC_ENV_PART;
509 uint mmc_get_env_part(struct mmc *mmc)
511 int devno = mmc_get_boot_dev();
513 /* If not boot from sd/mmc, use default value */
515 return CONFIG_SYS_MMC_ENV_PART;
517 return board_mmc_get_env_part(devno);
522 int board_postclk_init(void)
524 /* NO LDO SOC on i.MX6SLL */
528 set_ldo_voltage(LDO_SOC, 1175); /* Set VDDSOC to 1.175V */
533 #if defined(CONFIG_FEC_MXC)
534 void imx_get_mac_from_fuse(int dev_id, unsigned char *mac)
536 struct ocotp_regs *ocotp = (struct ocotp_regs *)OCOTP_BASE_ADDR;
537 struct fuse_bank *bank = &ocotp->bank[4];
538 struct fuse_bank4_regs *fuse =
539 (struct fuse_bank4_regs *)bank->fuse_regs;
541 if ((is_mx6sx() || is_mx6ul() || is_mx6ull()) && dev_id == 1) {
542 u32 value = readl(&fuse->mac_addr2);
543 mac[0] = value >> 24 ;
544 mac[1] = value >> 16 ;
545 mac[2] = value >> 8 ;
548 value = readl(&fuse->mac_addr1);
549 mac[4] = value >> 24 ;
550 mac[5] = value >> 16 ;
553 u32 value = readl(&fuse->mac_addr1);
554 mac[0] = (value >> 8);
557 value = readl(&fuse->mac_addr0);
558 mac[2] = value >> 24 ;
559 mac[3] = value >> 16 ;
560 mac[4] = value >> 8 ;
568 * cfg_val will be used for
569 * Boot_cfg4[7:0]:Boot_cfg3[7:0]:Boot_cfg2[7:0]:Boot_cfg1[7:0]
570 * After reset, if GPR10[28] is 1, ROM will use GPR9[25:0]
571 * instead of SBMR1 to determine the boot device.
573 const struct boot_mode soc_boot_modes[] = {
574 {"normal", MAKE_CFGVAL(0x00, 0x00, 0x00, 0x00)},
575 /* reserved value should start rom usb */
576 #if defined(CONFIG_MX6UL) || defined(CONFIG_MX6ULL)
577 {"usb", MAKE_CFGVAL(0x20, 0x00, 0x00, 0x00)},
579 {"usb", MAKE_CFGVAL(0x10, 0x00, 0x00, 0x00)},
581 {"sata", MAKE_CFGVAL(0x20, 0x00, 0x00, 0x00)},
582 {"ecspi1:0", MAKE_CFGVAL(0x30, 0x00, 0x00, 0x08)},
583 {"ecspi1:1", MAKE_CFGVAL(0x30, 0x00, 0x00, 0x18)},
584 {"ecspi1:2", MAKE_CFGVAL(0x30, 0x00, 0x00, 0x28)},
585 {"ecspi1:3", MAKE_CFGVAL(0x30, 0x00, 0x00, 0x38)},
586 /* 4 bit bus width */
587 {"esdhc1", MAKE_CFGVAL(0x40, 0x20, 0x00, 0x00)},
588 {"esdhc2", MAKE_CFGVAL(0x40, 0x28, 0x00, 0x00)},
589 {"esdhc3", MAKE_CFGVAL(0x40, 0x30, 0x00, 0x00)},
590 {"esdhc4", MAKE_CFGVAL(0x40, 0x38, 0x00, 0x00)},
594 void reset_misc(void)
596 #ifdef CONFIG_VIDEO_MXS
603 struct anatop_regs *anatop = (struct anatop_regs *)ANATOP_BASE_ADDR;
604 struct mxc_ccm_reg *ccm = (struct mxc_ccm_reg *)CCM_BASE_ADDR;
607 u32 reg, periph1, periph2;
609 if (is_mx6sx() || is_mx6ul() || is_mx6ull() || is_mx6sll())
612 /* Due to hardware limitation, on MX6Q we need to gate/ungate all PFDs
613 * to make sure PFD is working right, otherwise, PFDs may
614 * not output clock after reset, MX6DL and MX6SL have added 396M pfd
615 * workaround in ROM code, as bus clock need it
618 mask480 = ANATOP_PFD_CLKGATE_MASK(0) |
619 ANATOP_PFD_CLKGATE_MASK(1) |
620 ANATOP_PFD_CLKGATE_MASK(2) |
621 ANATOP_PFD_CLKGATE_MASK(3);
622 mask528 = ANATOP_PFD_CLKGATE_MASK(1) |
623 ANATOP_PFD_CLKGATE_MASK(3);
625 reg = readl(&ccm->cbcmr);
626 periph2 = ((reg & MXC_CCM_CBCMR_PRE_PERIPH2_CLK_SEL_MASK)
627 >> MXC_CCM_CBCMR_PRE_PERIPH2_CLK_SEL_OFFSET);
628 periph1 = ((reg & MXC_CCM_CBCMR_PRE_PERIPH_CLK_SEL_MASK)
629 >> MXC_CCM_CBCMR_PRE_PERIPH_CLK_SEL_OFFSET);
631 /* Checking if PLL2 PFD0 or PLL2 PFD2 is using for periph clock */
632 if ((periph2 != 0x2) && (periph1 != 0x2))
633 mask528 |= ANATOP_PFD_CLKGATE_MASK(0);
635 if ((periph2 != 0x1) && (periph1 != 0x1) &&
636 (periph2 != 0x3) && (periph1 != 0x3))
637 mask528 |= ANATOP_PFD_CLKGATE_MASK(2);
639 writel(mask480, &anatop->pfd_480_set);
640 writel(mask528, &anatop->pfd_528_set);
641 writel(mask480, &anatop->pfd_480_clr);
642 writel(mask528, &anatop->pfd_528_clr);
645 #ifdef CONFIG_IMX_HDMI
646 void imx_enable_hdmi_phy(void)
648 struct hdmi_regs *hdmi = (struct hdmi_regs *)HDMI_ARB_BASE_ADDR;
650 reg = readb(&hdmi->phy_conf0);
651 reg |= HDMI_PHY_CONF0_PDZ_MASK;
652 writeb(reg, &hdmi->phy_conf0);
654 reg |= HDMI_PHY_CONF0_ENTMDS_MASK;
655 writeb(reg, &hdmi->phy_conf0);
657 reg |= HDMI_PHY_CONF0_GEN2_TXPWRON_MASK;
658 writeb(reg, &hdmi->phy_conf0);
659 writeb(HDMI_MC_PHYRSTZ_ASSERT, &hdmi->mc_phyrstz);
662 void imx_setup_hdmi(void)
664 struct mxc_ccm_reg *mxc_ccm = (struct mxc_ccm_reg *)CCM_BASE_ADDR;
665 struct hdmi_regs *hdmi = (struct hdmi_regs *)HDMI_ARB_BASE_ADDR;
669 /* Turn on HDMI PHY clock */
670 reg = readl(&mxc_ccm->CCGR2);
671 reg |= MXC_CCM_CCGR2_HDMI_TX_IAHBCLK_MASK|
672 MXC_CCM_CCGR2_HDMI_TX_ISFRCLK_MASK;
673 writel(reg, &mxc_ccm->CCGR2);
674 writeb(HDMI_MC_PHYRSTZ_DEASSERT, &hdmi->mc_phyrstz);
675 reg = readl(&mxc_ccm->chsccdr);
676 reg &= ~(MXC_CCM_CHSCCDR_IPU1_DI0_PRE_CLK_SEL_MASK|
677 MXC_CCM_CHSCCDR_IPU1_DI0_PODF_MASK|
678 MXC_CCM_CHSCCDR_IPU1_DI0_CLK_SEL_MASK);
679 reg |= (CHSCCDR_PODF_DIVIDE_BY_3
680 << MXC_CCM_CHSCCDR_IPU1_DI0_PODF_OFFSET)
681 |(CHSCCDR_IPU_PRE_CLK_540M_PFD
682 << MXC_CCM_CHSCCDR_IPU1_DI0_PRE_CLK_SEL_OFFSET);
683 writel(reg, &mxc_ccm->chsccdr);
685 /* Clear the overflow condition */
686 if (readb(&hdmi->ih_fc_stat2) & HDMI_IH_FC_STAT2_OVERFLOW_MASK) {
687 /* TMDS software reset */
688 writeb((u8)~HDMI_MC_SWRSTZ_TMDSSWRST_REQ, &hdmi->mc_swrstz);
689 val = readb(&hdmi->fc_invidconf);
690 /* Need minimum 3 times to write to clear the register */
691 for (count = 0 ; count < 5 ; count++)
692 writeb(val, &hdmi->fc_invidconf);
697 #ifdef CONFIG_IMX_BOOTAUX
698 int arch_auxiliary_core_up(u32 core_id, u32 boot_private_data)
703 if (!boot_private_data)
706 stack = *(u32 *)boot_private_data;
707 pc = *(u32 *)(boot_private_data + 4);
709 /* Set the stack and pc to M4 bootROM */
710 writel(stack, M4_BOOTROM_BASE_ADDR);
711 writel(pc, M4_BOOTROM_BASE_ADDR + 4);
714 src_reg = (struct src *)SRC_BASE_ADDR;
715 clrsetbits_le32(&src_reg->scr, SRC_SCR_M4C_NON_SCLR_RST_MASK,
716 SRC_SCR_M4_ENABLE_MASK);
721 int arch_auxiliary_core_check_up(u32 core_id)
723 struct src *src_reg = (struct src *)SRC_BASE_ADDR;
726 val = readl(&src_reg->scr);
728 if (val & SRC_SCR_M4C_NON_SCLR_RST_MASK)
729 return 0; /* assert in reset */