1 // SPDX-License-Identifier: GPL-2.0+
4 * Sascha Hauer, Pengutronix
6 * (C) Copyright 2009 Freescale Semiconductor, Inc.
10 #include <linux/errno.h>
12 #include <asm/arch/imx-regs.h>
13 #include <asm/arch/clock.h>
14 #include <asm/arch/sys_proto.h>
15 #include <asm/bootm.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
);
368 int arch_cpu_init(void)
370 struct mxc_ccm_reg
*ccm
= (struct mxc_ccm_reg
*)CCM_BASE_ADDR
;
374 /* Need to clear MMDC_CHx_MASK to make warm reset work. */
375 clear_mmdc_ch_mask();
378 * Disable self-bias circuit in the analog bandap.
379 * The self-bias circuit is used by the bandgap during startup.
380 * This bit should be set after the bandgap has initialized.
384 if (!is_mx6ul() && !is_mx6ull()) {
386 * When low freq boot is enabled, ROM will not set AHB
387 * freq, so we need to ensure AHB freq is 132MHz in such
390 * To i.MX6UL, when power up, default ARM core and
391 * AHB rate is 396M and 132M.
393 if (mxc_get_clock(MXC_ARM_CLK
) == 396000000)
394 set_ahb_rate(132000000);
398 if (is_soc_rev(CHIP_REV_1_0
) == 0) {
400 * According to the design team's requirement on
401 * i.MX6UL,the PMIC_STBY_REQ PAD should be configured
402 * as open drain 100K (0x0000b8a0).
403 * Only exists on TO1.0
405 writel(0x0000b8a0, IOMUXC_BASE_ADDR
+ 0x29c);
408 * From TO1.1, SNVS adds internal pull up control
409 * for POR_B, the register filed is GPBIT[1:0],
410 * after system boot up, it can be set to 2b'01
411 * to disable internal pull up.It can save about
412 * 30uA power in SNVS mode.
414 writel((readl(MX6UL_SNVS_LP_BASE_ADDR
+ 0x10) &
416 MX6UL_SNVS_LP_BASE_ADDR
+ 0x10);
422 * GPBIT[1:0] is suggested to set to 2'b11:
423 * 2'b00 : always PUP100K
424 * 2'b01 : PUP100K when PMIC_ON_REQ or SOC_NOT_FAIL
425 * 2'b10 : always disable PUP100K
426 * 2'b11 : PDN100K when SOC_FAIL, PUP100K when SOC_NOT_FAIL
427 * register offset is different from i.MX6UL, since
428 * i.MX6UL is fixed by ECO.
430 writel(readl(MX6UL_SNVS_LP_BASE_ADDR
) |
431 0x3, MX6UL_SNVS_LP_BASE_ADDR
);
434 /* Set perclk to source from OSC 24MHz */
436 setbits_le32(&ccm
->cscmr1
, MXC_CCM_CSCMR1_PER_CLK_SEL_MASK
);
438 imx_wdog_disable_powerdown(); /* Disable PDE bit of WMCR register */
441 setbits_le32(&ccm
->cscdr1
, MXC_CCM_CSCDR1_UART_CLK_SEL
);
448 #ifdef CONFIG_ENV_IS_IN_MMC
449 __weak
int board_mmc_get_env_dev(int devno
)
451 return CONFIG_SYS_MMC_ENV_DEV
;
454 static int mmc_get_boot_dev(void)
456 struct src
*src_regs
= (struct src
*)SRC_BASE_ADDR
;
457 u32 soc_sbmr
= readl(&src_regs
->sbmr1
);
463 * "i.MX 6Dual/6Quad Applications Processor Reference Manual"
464 * Chapter "8.5.3.1 Expansion Device eFUSE Configuration"
465 * i.MX6SL/SX/UL has same layout.
467 bootsel
= (soc_sbmr
& 0x000000FF) >> 6;
469 /* No boot from sd/mmc */
473 /* BOOT_CFG2[3] and BOOT_CFG2[4] */
474 devno
= (soc_sbmr
& 0x00001800) >> 11;
479 int mmc_get_env_dev(void)
481 int devno
= mmc_get_boot_dev();
483 /* If not boot from sd/mmc, use default value */
485 return CONFIG_SYS_MMC_ENV_DEV
;
487 return board_mmc_get_env_dev(devno
);
490 #ifdef CONFIG_SYS_MMC_ENV_PART
491 __weak
int board_mmc_get_env_part(int devno
)
493 return CONFIG_SYS_MMC_ENV_PART
;
496 uint
mmc_get_env_part(struct mmc
*mmc
)
498 int devno
= mmc_get_boot_dev();
500 /* If not boot from sd/mmc, use default value */
502 return CONFIG_SYS_MMC_ENV_PART
;
504 return board_mmc_get_env_part(devno
);
509 int board_postclk_init(void)
511 /* NO LDO SOC on i.MX6SLL */
515 set_ldo_voltage(LDO_SOC
, 1175); /* Set VDDSOC to 1.175V */
520 #ifndef CONFIG_SPL_BUILD
522 * cfg_val will be used for
523 * Boot_cfg4[7:0]:Boot_cfg3[7:0]:Boot_cfg2[7:0]:Boot_cfg1[7:0]
524 * After reset, if GPR10[28] is 1, ROM will use GPR9[25:0]
525 * instead of SBMR1 to determine the boot device.
527 const struct boot_mode soc_boot_modes
[] = {
528 {"normal", MAKE_CFGVAL(0x00, 0x00, 0x00, 0x00)},
529 /* reserved value should start rom usb */
530 #if defined(CONFIG_MX6UL) || defined(CONFIG_MX6ULL)
531 {"usb", MAKE_CFGVAL(0x20, 0x00, 0x00, 0x00)},
533 {"usb", MAKE_CFGVAL(0x10, 0x00, 0x00, 0x00)},
535 {"sata", MAKE_CFGVAL(0x20, 0x00, 0x00, 0x00)},
536 {"ecspi1:0", MAKE_CFGVAL(0x30, 0x00, 0x00, 0x08)},
537 {"ecspi1:1", MAKE_CFGVAL(0x30, 0x00, 0x00, 0x18)},
538 {"ecspi1:2", MAKE_CFGVAL(0x30, 0x00, 0x00, 0x28)},
539 {"ecspi1:3", MAKE_CFGVAL(0x30, 0x00, 0x00, 0x38)},
540 /* 4 bit bus width */
541 {"esdhc1", MAKE_CFGVAL(0x40, 0x20, 0x00, 0x00)},
542 {"esdhc2", MAKE_CFGVAL(0x40, 0x28, 0x00, 0x00)},
543 {"esdhc3", MAKE_CFGVAL(0x40, 0x30, 0x00, 0x00)},
544 {"esdhc4", MAKE_CFGVAL(0x40, 0x38, 0x00, 0x00)},
549 void reset_misc(void)
551 #ifdef CONFIG_VIDEO_MXS
558 struct anatop_regs
*anatop
= (struct anatop_regs
*)ANATOP_BASE_ADDR
;
559 struct mxc_ccm_reg
*ccm
= (struct mxc_ccm_reg
*)CCM_BASE_ADDR
;
562 u32 reg
, periph1
, periph2
;
564 if (is_mx6sx() || is_mx6ul() || is_mx6ull() || is_mx6sll())
567 /* Due to hardware limitation, on MX6Q we need to gate/ungate all PFDs
568 * to make sure PFD is working right, otherwise, PFDs may
569 * not output clock after reset, MX6DL and MX6SL have added 396M pfd
570 * workaround in ROM code, as bus clock need it
573 mask480
= ANATOP_PFD_CLKGATE_MASK(0) |
574 ANATOP_PFD_CLKGATE_MASK(1) |
575 ANATOP_PFD_CLKGATE_MASK(2) |
576 ANATOP_PFD_CLKGATE_MASK(3);
577 mask528
= ANATOP_PFD_CLKGATE_MASK(1) |
578 ANATOP_PFD_CLKGATE_MASK(3);
580 reg
= readl(&ccm
->cbcmr
);
581 periph2
= ((reg
& MXC_CCM_CBCMR_PRE_PERIPH2_CLK_SEL_MASK
)
582 >> MXC_CCM_CBCMR_PRE_PERIPH2_CLK_SEL_OFFSET
);
583 periph1
= ((reg
& MXC_CCM_CBCMR_PRE_PERIPH_CLK_SEL_MASK
)
584 >> MXC_CCM_CBCMR_PRE_PERIPH_CLK_SEL_OFFSET
);
586 /* Checking if PLL2 PFD0 or PLL2 PFD2 is using for periph clock */
587 if ((periph2
!= 0x2) && (periph1
!= 0x2))
588 mask528
|= ANATOP_PFD_CLKGATE_MASK(0);
590 if ((periph2
!= 0x1) && (periph1
!= 0x1) &&
591 (periph2
!= 0x3) && (periph1
!= 0x3))
592 mask528
|= ANATOP_PFD_CLKGATE_MASK(2);
594 writel(mask480
, &anatop
->pfd_480_set
);
595 writel(mask528
, &anatop
->pfd_528_set
);
596 writel(mask480
, &anatop
->pfd_480_clr
);
597 writel(mask528
, &anatop
->pfd_528_clr
);
600 #ifdef CONFIG_IMX_HDMI
601 void imx_enable_hdmi_phy(void)
603 struct hdmi_regs
*hdmi
= (struct hdmi_regs
*)HDMI_ARB_BASE_ADDR
;
605 reg
= readb(&hdmi
->phy_conf0
);
606 reg
|= HDMI_PHY_CONF0_PDZ_MASK
;
607 writeb(reg
, &hdmi
->phy_conf0
);
609 reg
|= HDMI_PHY_CONF0_ENTMDS_MASK
;
610 writeb(reg
, &hdmi
->phy_conf0
);
612 reg
|= HDMI_PHY_CONF0_GEN2_TXPWRON_MASK
;
613 writeb(reg
, &hdmi
->phy_conf0
);
614 writeb(HDMI_MC_PHYRSTZ_ASSERT
, &hdmi
->mc_phyrstz
);
617 void imx_setup_hdmi(void)
619 struct mxc_ccm_reg
*mxc_ccm
= (struct mxc_ccm_reg
*)CCM_BASE_ADDR
;
620 struct hdmi_regs
*hdmi
= (struct hdmi_regs
*)HDMI_ARB_BASE_ADDR
;
624 /* Turn on HDMI PHY clock */
625 reg
= readl(&mxc_ccm
->CCGR2
);
626 reg
|= MXC_CCM_CCGR2_HDMI_TX_IAHBCLK_MASK
|
627 MXC_CCM_CCGR2_HDMI_TX_ISFRCLK_MASK
;
628 writel(reg
, &mxc_ccm
->CCGR2
);
629 writeb(HDMI_MC_PHYRSTZ_DEASSERT
, &hdmi
->mc_phyrstz
);
630 reg
= readl(&mxc_ccm
->chsccdr
);
631 reg
&= ~(MXC_CCM_CHSCCDR_IPU1_DI0_PRE_CLK_SEL_MASK
|
632 MXC_CCM_CHSCCDR_IPU1_DI0_PODF_MASK
|
633 MXC_CCM_CHSCCDR_IPU1_DI0_CLK_SEL_MASK
);
634 reg
|= (CHSCCDR_PODF_DIVIDE_BY_3
635 << MXC_CCM_CHSCCDR_IPU1_DI0_PODF_OFFSET
)
636 |(CHSCCDR_IPU_PRE_CLK_540M_PFD
637 << MXC_CCM_CHSCCDR_IPU1_DI0_PRE_CLK_SEL_OFFSET
);
638 writel(reg
, &mxc_ccm
->chsccdr
);
640 /* Clear the overflow condition */
641 if (readb(&hdmi
->ih_fc_stat2
) & HDMI_IH_FC_STAT2_OVERFLOW_MASK
) {
642 /* TMDS software reset */
643 writeb((u8
)~HDMI_MC_SWRSTZ_TMDSSWRST_REQ
, &hdmi
->mc_swrstz
);
644 val
= readb(&hdmi
->fc_invidconf
);
645 /* Need minimum 3 times to write to clear the register */
646 for (count
= 0 ; count
< 5 ; count
++)
647 writeb(val
, &hdmi
->fc_invidconf
);
654 struct iomuxc
*iomux
= (struct iomuxc
*)IOMUXC_BASE_ADDR
;
656 /* enable AXI cache for VDOA/VPU/IPU */
657 writel(0xF00000CF, &iomux
->gpr
[4]);
659 /* set IPU AXI-id1 Qos=0x1 AXI-id0/2/3 Qos=0x7 */
660 writel(0x77177717, &iomux
->gpr
[6]);
661 writel(0x77177717, &iomux
->gpr
[7]);
663 /* set IPU AXI-id0 Qos=0xf(bypass) AXI-id1 Qos=0x7 */
664 writel(0x007F007F, &iomux
->gpr
[6]);
665 writel(0x007F007F, &iomux
->gpr
[7]);