3 * Sascha Hauer, Pengutronix
5 * (C) Copyright 2009 Freescale Semiconductor, Inc.
7 * SPDX-License-Identifier: GPL-2.0+
11 #include <asm/armv7.h>
12 #include <asm/bootm.h>
13 #include <asm/pl310.h>
14 #include <asm/errno.h>
16 #include <asm/arch/imx-regs.h>
17 #include <asm/arch/clock.h>
18 #include <asm/arch/sys_proto.h>
19 #include <asm/imx-common/boot_mode.h>
20 #include <asm/imx-common/dma.h>
22 #include <asm/arch/mxc_hdmi.h>
23 #include <asm/arch/crm_regs.h>
25 #include <imx_thermal.h>
41 #if defined(CONFIG_IMX6_THERMAL)
42 static const struct imx_thermal_plat imx6_thermal_plat = {
43 .regs = (void *)ANATOP_BASE_ADDR,
48 U_BOOT_DEVICE(imx6_thermal) = {
49 .name = "imx_thermal",
50 .platdata = &imx6_thermal_plat,
56 struct scu_regs *scu = (struct scu_regs *)SCU_BASE_ADDR;
57 return readl(&scu->config) & 3;
62 struct anatop_regs *anatop = (struct anatop_regs *)ANATOP_BASE_ADDR;
63 u32 reg = readl(&anatop->digprog_sololite);
64 u32 type = ((reg >> 16) & 0xff);
66 if (type != MXC_CPU_MX6SL) {
67 reg = readl(&anatop->digprog);
68 struct scu_regs *scu = (struct scu_regs *)SCU_BASE_ADDR;
69 u32 cfg = readl(&scu->config) & 3;
70 type = ((reg >> 16) & 0xff);
71 if (type == MXC_CPU_MX6DL) {
73 type = MXC_CPU_MX6SOLO;
76 if (type == MXC_CPU_MX6Q) {
82 reg &= 0xff; /* mx6 silicon revision */
83 return (type << 12) | (reg + 0x10);
87 * OCOTP_CFG3[17:16] (see Fusemap Description Table offset 0x440)
88 * defines a 2-bit SPEED_GRADING
90 #define OCOTP_CFG3_SPEED_SHIFT 16
91 #define OCOTP_CFG3_SPEED_800MHZ 0
92 #define OCOTP_CFG3_SPEED_850MHZ 1
93 #define OCOTP_CFG3_SPEED_1GHZ 2
94 #define OCOTP_CFG3_SPEED_1P2GHZ 3
96 u32 get_cpu_speed_grade_hz(void)
98 struct ocotp_regs *ocotp = (struct ocotp_regs *)OCOTP_BASE_ADDR;
99 struct fuse_bank *bank = &ocotp->bank[0];
100 struct fuse_bank0_regs *fuse =
101 (struct fuse_bank0_regs *)bank->fuse_regs;
104 val = readl(&fuse->cfg3);
105 val >>= OCOTP_CFG3_SPEED_SHIFT;
109 /* Valid for IMX6DQ */
110 case OCOTP_CFG3_SPEED_1P2GHZ:
111 if (is_cpu_type(MXC_CPU_MX6Q) || is_cpu_type(MXC_CPU_MX6D))
113 /* Valid for IMX6SX/IMX6SDL/IMX6DQ */
114 case OCOTP_CFG3_SPEED_1GHZ:
116 /* Valid for IMX6DQ */
117 case OCOTP_CFG3_SPEED_850MHZ:
118 if (is_cpu_type(MXC_CPU_MX6Q) || is_cpu_type(MXC_CPU_MX6D))
120 /* Valid for IMX6SX/IMX6SDL/IMX6DQ */
121 case OCOTP_CFG3_SPEED_800MHZ:
127 #ifdef CONFIG_REVISION_TAG
128 u32 __weak get_board_rev(void)
130 u32 cpurev = get_cpu_rev();
131 u32 type = ((cpurev >> 12) & 0xff);
132 if (type == MXC_CPU_MX6SOLO)
133 cpurev = (MXC_CPU_MX6DL) << 12 | (cpurev & 0xFFF);
135 if (type == MXC_CPU_MX6D)
136 cpurev = (MXC_CPU_MX6Q) << 12 | (cpurev & 0xFFF);
144 struct aipstz_regs *aips1, *aips2;
146 struct aipstz_regs *aips3;
149 aips1 = (struct aipstz_regs *)AIPS1_BASE_ADDR;
150 aips2 = (struct aipstz_regs *)AIPS2_BASE_ADDR;
152 aips3 = (struct aipstz_regs *)AIPS3_CONFIG_BASE_ADDR;
156 * Set all MPROTx to be non-bufferable, trusted for R/W,
157 * not forced to user-mode.
159 writel(0x77777777, &aips1->mprot0);
160 writel(0x77777777, &aips1->mprot1);
161 writel(0x77777777, &aips2->mprot0);
162 writel(0x77777777, &aips2->mprot1);
165 * Set all OPACRx to be non-bufferable, not require
166 * supervisor privilege level for access,allow for
167 * write access and untrusted master access.
169 writel(0x00000000, &aips1->opacr0);
170 writel(0x00000000, &aips1->opacr1);
171 writel(0x00000000, &aips1->opacr2);
172 writel(0x00000000, &aips1->opacr3);
173 writel(0x00000000, &aips1->opacr4);
174 writel(0x00000000, &aips2->opacr0);
175 writel(0x00000000, &aips2->opacr1);
176 writel(0x00000000, &aips2->opacr2);
177 writel(0x00000000, &aips2->opacr3);
178 writel(0x00000000, &aips2->opacr4);
182 * Set all MPROTx to be non-bufferable, trusted for R/W,
183 * not forced to user-mode.
185 writel(0x77777777, &aips3->mprot0);
186 writel(0x77777777, &aips3->mprot1);
189 * Set all OPACRx to be non-bufferable, not require
190 * supervisor privilege level for access,allow for
191 * write access and untrusted master access.
193 writel(0x00000000, &aips3->opacr0);
194 writel(0x00000000, &aips3->opacr1);
195 writel(0x00000000, &aips3->opacr2);
196 writel(0x00000000, &aips3->opacr3);
197 writel(0x00000000, &aips3->opacr4);
201 static void clear_ldo_ramp(void)
203 struct anatop_regs *anatop = (struct anatop_regs *)ANATOP_BASE_ADDR;
206 /* ROM may modify LDO ramp up time according to fuse setting, so in
207 * order to be in the safe side we neeed to reset these settings to
208 * match the reset value: 0'b00
210 reg = readl(&anatop->ana_misc2);
211 reg &= ~(0x3f << 24);
212 writel(reg, &anatop->ana_misc2);
216 * Set the PMU_REG_CORE register
218 * Set LDO_SOC/PU/ARM regulators to the specified millivolt level.
219 * Possible values are from 0.725V to 1.450V in steps of
222 static int set_ldo_voltage(enum ldo_reg ldo, u32 mv)
224 struct anatop_regs *anatop = (struct anatop_regs *)ANATOP_BASE_ADDR;
225 u32 val, step, old, reg = readl(&anatop->reg_core);
229 val = 0x00; /* Power gated off */
231 val = 0x1F; /* Power FET switched full on. No regulation */
233 val = (mv - 700) / 25;
251 old = (reg & (0x1F << shift)) >> shift;
252 step = abs(val - old);
256 reg = (reg & ~(0x1F << shift)) | (val << shift);
257 writel(reg, &anatop->reg_core);
260 * The LDO ramp-up is based on 64 clock cycles of 24 MHz = 2.6 us per
268 static void imx_set_wdog_powerdown(bool enable)
270 struct wdog_regs *wdog1 = (struct wdog_regs *)WDOG1_BASE_ADDR;
271 struct wdog_regs *wdog2 = (struct wdog_regs *)WDOG2_BASE_ADDR;
274 struct wdog_regs *wdog3 = (struct wdog_regs *)WDOG3_BASE_ADDR;
275 writew(enable, &wdog3->wmcr);
278 /* Write to the PDE (Power Down Enable) bit */
279 writew(enable, &wdog1->wmcr);
280 writew(enable, &wdog2->wmcr);
283 static void set_ahb_rate(u32 val)
285 struct mxc_ccm_reg *mxc_ccm = (struct mxc_ccm_reg *)CCM_BASE_ADDR;
288 div = get_periph_clk() / val - 1;
289 reg = readl(&mxc_ccm->cbcdr);
291 writel((reg & (~MXC_CCM_CBCDR_AHB_PODF_MASK)) |
292 (div << MXC_CCM_CBCDR_AHB_PODF_OFFSET), &mxc_ccm->cbcdr);
295 static void clear_mmdc_ch_mask(void)
297 struct mxc_ccm_reg *mxc_ccm = (struct mxc_ccm_reg *)CCM_BASE_ADDR;
299 /* Clear MMDC channel mask */
300 writel(0, &mxc_ccm->ccdr);
303 static void init_bandgap(void)
305 struct anatop_regs *anatop = (struct anatop_regs *)ANATOP_BASE_ADDR;
307 * Ensure the bandgap has stabilized.
309 while (!(readl(&anatop->ana_misc0) & 0x80))
312 * For best noise performance of the analog blocks using the
313 * outputs of the bandgap, the reftop_selfbiasoff bit should
316 writel(BM_ANADIG_ANA_MISC0_REFTOP_SELBIASOFF, &anatop->ana_misc0_set);
321 static void set_preclk_from_osc(void)
323 struct mxc_ccm_reg *mxc_ccm = (struct mxc_ccm_reg *)CCM_BASE_ADDR;
326 reg = readl(&mxc_ccm->cscmr1);
327 reg |= MXC_CCM_CSCMR1_PER_CLK_SEL_MASK;
328 writel(reg, &mxc_ccm->cscmr1);
332 #define SRC_SCR_WARM_RESET_ENABLE 0
334 static void init_src(void)
336 struct src *src_regs = (struct src *)SRC_BASE_ADDR;
340 * force warm reset sources to generate cold reset
341 * for a more reliable restart
343 val = readl(&src_regs->scr);
344 val &= ~(1 << SRC_SCR_WARM_RESET_ENABLE);
345 writel(val, &src_regs->scr);
348 int arch_cpu_init(void)
352 /* Need to clear MMDC_CHx_MASK to make warm reset work. */
353 clear_mmdc_ch_mask();
356 * Disable self-bias circuit in the analog bandap.
357 * The self-bias circuit is used by the bandgap during startup.
358 * This bit should be set after the bandgap has initialized.
363 * When low freq boot is enabled, ROM will not set AHB
364 * freq, so we need to ensure AHB freq is 132MHz in such
367 if (mxc_get_clock(MXC_ARM_CLK) == 396000000)
368 set_ahb_rate(132000000);
370 /* Set perclk to source from OSC 24MHz */
371 #if defined(CONFIG_MX6SL)
372 set_preclk_from_osc();
375 imx_set_wdog_powerdown(false); /* Disable PDE bit of WMCR register */
377 #ifdef CONFIG_APBH_DMA
387 int board_postclk_init(void)
389 set_ldo_voltage(LDO_SOC, 1175); /* Set VDDSOC to 1.175V */
394 #ifndef CONFIG_SYS_DCACHE_OFF
395 void enable_caches(void)
397 #if defined(CONFIG_SYS_ARM_CACHE_WRITETHROUGH)
398 enum dcache_option option = DCACHE_WRITETHROUGH;
400 enum dcache_option option = DCACHE_WRITEBACK;
403 /* Avoid random hang when download by usb */
404 invalidate_dcache_all();
406 /* Enable D-cache. I-cache is already enabled in start.S */
409 /* Enable caching on OCRAM and ROM */
410 mmu_set_region_dcache_behaviour(ROMCP_ARB_BASE_ADDR,
413 mmu_set_region_dcache_behaviour(IRAM_BASE_ADDR,
419 #if defined(CONFIG_FEC_MXC)
420 void imx_get_mac_from_fuse(int dev_id, unsigned char *mac)
422 struct ocotp_regs *ocotp = (struct ocotp_regs *)OCOTP_BASE_ADDR;
423 struct fuse_bank *bank = &ocotp->bank[4];
424 struct fuse_bank4_regs *fuse =
425 (struct fuse_bank4_regs *)bank->fuse_regs;
427 u32 value = readl(&fuse->mac_addr_high);
428 mac[0] = (value >> 8);
431 value = readl(&fuse->mac_addr_low);
432 mac[2] = value >> 24 ;
433 mac[3] = value >> 16 ;
434 mac[4] = value >> 8 ;
440 void boot_mode_apply(unsigned cfg_val)
443 struct src *psrc = (struct src *)SRC_BASE_ADDR;
444 writel(cfg_val, &psrc->gpr9);
445 reg = readl(&psrc->gpr10);
450 writel(reg, &psrc->gpr10);
453 * cfg_val will be used for
454 * Boot_cfg4[7:0]:Boot_cfg3[7:0]:Boot_cfg2[7:0]:Boot_cfg1[7:0]
455 * After reset, if GPR10[28] is 1, ROM will use GPR9[25:0]
456 * instead of SBMR1 to determine the boot device.
458 const struct boot_mode soc_boot_modes[] = {
459 {"normal", MAKE_CFGVAL(0x00, 0x00, 0x00, 0x00)},
460 /* reserved value should start rom usb */
461 {"usb", MAKE_CFGVAL(0x01, 0x00, 0x00, 0x00)},
462 {"sata", MAKE_CFGVAL(0x20, 0x00, 0x00, 0x00)},
463 {"ecspi1:0", MAKE_CFGVAL(0x30, 0x00, 0x00, 0x08)},
464 {"ecspi1:1", MAKE_CFGVAL(0x30, 0x00, 0x00, 0x18)},
465 {"ecspi1:2", MAKE_CFGVAL(0x30, 0x00, 0x00, 0x28)},
466 {"ecspi1:3", MAKE_CFGVAL(0x30, 0x00, 0x00, 0x38)},
467 /* 4 bit bus width */
468 {"esdhc1", MAKE_CFGVAL(0x40, 0x20, 0x00, 0x00)},
469 {"esdhc2", MAKE_CFGVAL(0x40, 0x28, 0x00, 0x00)},
470 {"esdhc3", MAKE_CFGVAL(0x40, 0x30, 0x00, 0x00)},
471 {"esdhc4", MAKE_CFGVAL(0x40, 0x38, 0x00, 0x00)},
477 struct anatop_regs *anatop = (struct anatop_regs *)ANATOP_BASE_ADDR;
478 struct mxc_ccm_reg *ccm = (struct mxc_ccm_reg *)CCM_BASE_ADDR;
481 u32 reg, periph1, periph2;
483 if (is_cpu_type(MXC_CPU_MX6SX))
486 /* Due to hardware limitation, on MX6Q we need to gate/ungate all PFDs
487 * to make sure PFD is working right, otherwise, PFDs may
488 * not output clock after reset, MX6DL and MX6SL have added 396M pfd
489 * workaround in ROM code, as bus clock need it
492 mask480 = ANATOP_PFD_CLKGATE_MASK(0) |
493 ANATOP_PFD_CLKGATE_MASK(1) |
494 ANATOP_PFD_CLKGATE_MASK(2) |
495 ANATOP_PFD_CLKGATE_MASK(3);
496 mask528 = ANATOP_PFD_CLKGATE_MASK(1) |
497 ANATOP_PFD_CLKGATE_MASK(3);
499 reg = readl(&ccm->cbcmr);
500 periph2 = ((reg & MXC_CCM_CBCMR_PRE_PERIPH2_CLK_SEL_MASK)
501 >> MXC_CCM_CBCMR_PRE_PERIPH2_CLK_SEL_OFFSET);
502 periph1 = ((reg & MXC_CCM_CBCMR_PRE_PERIPH_CLK_SEL_MASK)
503 >> MXC_CCM_CBCMR_PRE_PERIPH_CLK_SEL_OFFSET);
505 /* Checking if PLL2 PFD0 or PLL2 PFD2 is using for periph clock */
506 if ((periph2 != 0x2) && (periph1 != 0x2))
507 mask528 |= ANATOP_PFD_CLKGATE_MASK(0);
509 if ((periph2 != 0x1) && (periph1 != 0x1) &&
510 (periph2 != 0x3) && (periph1 != 0x3))
511 mask528 |= ANATOP_PFD_CLKGATE_MASK(2);
513 writel(mask480, &anatop->pfd_480_set);
514 writel(mask528, &anatop->pfd_528_set);
515 writel(mask480, &anatop->pfd_480_clr);
516 writel(mask528, &anatop->pfd_528_clr);
519 #ifdef CONFIG_IMX_HDMI
520 void imx_enable_hdmi_phy(void)
522 struct hdmi_regs *hdmi = (struct hdmi_regs *)HDMI_ARB_BASE_ADDR;
524 reg = readb(&hdmi->phy_conf0);
525 reg |= HDMI_PHY_CONF0_PDZ_MASK;
526 writeb(reg, &hdmi->phy_conf0);
528 reg |= HDMI_PHY_CONF0_ENTMDS_MASK;
529 writeb(reg, &hdmi->phy_conf0);
531 reg |= HDMI_PHY_CONF0_GEN2_TXPWRON_MASK;
532 writeb(reg, &hdmi->phy_conf0);
533 writeb(HDMI_MC_PHYRSTZ_ASSERT, &hdmi->mc_phyrstz);
536 void imx_setup_hdmi(void)
538 struct mxc_ccm_reg *mxc_ccm = (struct mxc_ccm_reg *)CCM_BASE_ADDR;
539 struct hdmi_regs *hdmi = (struct hdmi_regs *)HDMI_ARB_BASE_ADDR;
542 /* Turn on HDMI PHY clock */
543 reg = readl(&mxc_ccm->CCGR2);
544 reg |= MXC_CCM_CCGR2_HDMI_TX_IAHBCLK_MASK|
545 MXC_CCM_CCGR2_HDMI_TX_ISFRCLK_MASK;
546 writel(reg, &mxc_ccm->CCGR2);
547 writeb(HDMI_MC_PHYRSTZ_DEASSERT, &hdmi->mc_phyrstz);
548 reg = readl(&mxc_ccm->chsccdr);
549 reg &= ~(MXC_CCM_CHSCCDR_IPU1_DI0_PRE_CLK_SEL_MASK|
550 MXC_CCM_CHSCCDR_IPU1_DI0_PODF_MASK|
551 MXC_CCM_CHSCCDR_IPU1_DI0_CLK_SEL_MASK);
552 reg |= (CHSCCDR_PODF_DIVIDE_BY_3
553 << MXC_CCM_CHSCCDR_IPU1_DI0_PODF_OFFSET)
554 |(CHSCCDR_IPU_PRE_CLK_540M_PFD
555 << MXC_CCM_CHSCCDR_IPU1_DI0_PRE_CLK_SEL_OFFSET);
556 writel(reg, &mxc_ccm->chsccdr);
560 #ifndef CONFIG_SYS_L2CACHE_OFF
561 #define IOMUXC_GPR11_L2CACHE_AS_OCRAM 0x00000002
562 void v7_outer_cache_enable(void)
564 struct pl310_regs *const pl310 = (struct pl310_regs *)L2_PL310_BASE;
569 * Set bit 22 in the auxiliary control register. If this bit
570 * is cleared, PL310 treats Normal Shared Non-cacheable
571 * accesses as Cacheable no-allocate.
573 setbits_le32(&pl310->pl310_aux_ctrl, L310_SHARED_ATT_OVERRIDE_ENABLE);
575 #if defined CONFIG_MX6SL
576 struct iomuxc *iomux = (struct iomuxc *)IOMUXC_BASE_ADDR;
577 val = readl(&iomux->gpr[11]);
578 if (val & IOMUXC_GPR11_L2CACHE_AS_OCRAM) {
579 /* L2 cache configured as OCRAM, reset it */
580 val &= ~IOMUXC_GPR11_L2CACHE_AS_OCRAM;
581 writel(val, &iomux->gpr[11]);
585 /* Must disable the L2 before changing the latency parameters */
586 clrbits_le32(&pl310->pl310_ctrl, L2X0_CTRL_EN);
588 writel(0x132, &pl310->pl310_tag_latency_ctrl);
589 writel(0x132, &pl310->pl310_data_latency_ctrl);
591 val = readl(&pl310->pl310_prefetch_ctrl);
593 /* Turn on the L2 I/D prefetch */
597 * The L2 cache controller(PL310) version on the i.MX6D/Q is r3p1-50rel0
598 * The L2 cache controller(PL310) version on the i.MX6DL/SOLO/SL is r3p2
599 * But according to ARM PL310 errata: 752271
600 * ID: 752271: Double linefill feature can cause data corruption
601 * Fault Status: Present in: r3p0, r3p1, r3p1-50rel0. Fixed in r3p2
602 * Workaround: The only workaround to this erratum is to disable the
603 * double linefill feature. This is the default behavior.
609 writel(val, &pl310->pl310_prefetch_ctrl);
611 val = readl(&pl310->pl310_power_ctrl);
612 val |= L2X0_DYNAMIC_CLK_GATING_EN;
613 val |= L2X0_STNDBY_MODE_EN;
614 writel(val, &pl310->pl310_power_ctrl);
616 setbits_le32(&pl310->pl310_ctrl, L2X0_CTRL_EN);
619 void v7_outer_cache_disable(void)
621 struct pl310_regs *const pl310 = (struct pl310_regs *)L2_PL310_BASE;
623 clrbits_le32(&pl310->pl310_ctrl, L2X0_CTRL_EN);
625 #endif /* !CONFIG_SYS_L2CACHE_OFF */