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/pl310.h>
13 #include <asm/errno.h>
15 #include <asm/arch/imx-regs.h>
16 #include <asm/arch/clock.h>
17 #include <asm/arch/sys_proto.h>
18 #include <asm/imx-common/boot_mode.h>
19 #include <asm/imx-common/dma.h>
21 #include <asm/arch/mxc_hdmi.h>
22 #include <asm/arch/crm_regs.h>
40 struct scu_regs *scu = (struct scu_regs *)SCU_BASE_ADDR;
41 return readl(&scu->config) & 3;
46 struct anatop_regs *anatop = (struct anatop_regs *)ANATOP_BASE_ADDR;
47 u32 reg = readl(&anatop->digprog_sololite);
48 u32 type = ((reg >> 16) & 0xff);
50 if (type != MXC_CPU_MX6SL) {
51 reg = readl(&anatop->digprog);
52 struct scu_regs *scu = (struct scu_regs *)SCU_BASE_ADDR;
53 u32 cfg = readl(&scu->config) & 3;
54 type = ((reg >> 16) & 0xff);
55 if (type == MXC_CPU_MX6DL) {
57 type = MXC_CPU_MX6SOLO;
60 if (type == MXC_CPU_MX6Q) {
66 reg &= 0xff; /* mx6 silicon revision */
67 return (type << 12) | (reg + 0x10);
70 #ifdef CONFIG_REVISION_TAG
71 u32 __weak get_board_rev(void)
73 u32 cpurev = get_cpu_rev();
74 u32 type = ((cpurev >> 12) & 0xff);
75 if (type == MXC_CPU_MX6SOLO)
76 cpurev = (MXC_CPU_MX6DL) << 12 | (cpurev & 0xFFF);
78 if (type == MXC_CPU_MX6D)
79 cpurev = (MXC_CPU_MX6Q) << 12 | (cpurev & 0xFFF);
87 struct aipstz_regs *aips1, *aips2;
89 struct aipstz_regs *aips3;
92 aips1 = (struct aipstz_regs *)AIPS1_BASE_ADDR;
93 aips2 = (struct aipstz_regs *)AIPS2_BASE_ADDR;
95 aips3 = (struct aipstz_regs *)AIPS3_BASE_ADDR;
99 * Set all MPROTx to be non-bufferable, trusted for R/W,
100 * not forced to user-mode.
102 writel(0x77777777, &aips1->mprot0);
103 writel(0x77777777, &aips1->mprot1);
104 writel(0x77777777, &aips2->mprot0);
105 writel(0x77777777, &aips2->mprot1);
108 * Set all OPACRx to be non-bufferable, not require
109 * supervisor privilege level for access,allow for
110 * write access and untrusted master access.
112 writel(0x00000000, &aips1->opacr0);
113 writel(0x00000000, &aips1->opacr1);
114 writel(0x00000000, &aips1->opacr2);
115 writel(0x00000000, &aips1->opacr3);
116 writel(0x00000000, &aips1->opacr4);
117 writel(0x00000000, &aips2->opacr0);
118 writel(0x00000000, &aips2->opacr1);
119 writel(0x00000000, &aips2->opacr2);
120 writel(0x00000000, &aips2->opacr3);
121 writel(0x00000000, &aips2->opacr4);
125 * Set all MPROTx to be non-bufferable, trusted for R/W,
126 * not forced to user-mode.
128 writel(0x77777777, &aips3->mprot0);
129 writel(0x77777777, &aips3->mprot1);
132 * Set all OPACRx to be non-bufferable, not require
133 * supervisor privilege level for access,allow for
134 * write access and untrusted master access.
136 writel(0x00000000, &aips3->opacr0);
137 writel(0x00000000, &aips3->opacr1);
138 writel(0x00000000, &aips3->opacr2);
139 writel(0x00000000, &aips3->opacr3);
140 writel(0x00000000, &aips3->opacr4);
144 static void clear_ldo_ramp(void)
146 struct anatop_regs *anatop = (struct anatop_regs *)ANATOP_BASE_ADDR;
149 /* ROM may modify LDO ramp up time according to fuse setting, so in
150 * order to be in the safe side we neeed to reset these settings to
151 * match the reset value: 0'b00
153 reg = readl(&anatop->ana_misc2);
154 reg &= ~(0x3f << 24);
155 writel(reg, &anatop->ana_misc2);
159 * Set the PMU_REG_CORE register
161 * Set LDO_SOC/PU/ARM regulators to the specified millivolt level.
162 * Possible values are from 0.725V to 1.450V in steps of
165 static int set_ldo_voltage(enum ldo_reg ldo, u32 mv)
167 struct anatop_regs *anatop = (struct anatop_regs *)ANATOP_BASE_ADDR;
168 u32 val, step, old, reg = readl(&anatop->reg_core);
172 val = 0x00; /* Power gated off */
174 val = 0x1F; /* Power FET switched full on. No regulation */
176 val = (mv - 700) / 25;
194 old = (reg & (0x1F << shift)) >> shift;
195 step = abs(val - old);
199 reg = (reg & ~(0x1F << shift)) | (val << shift);
200 writel(reg, &anatop->reg_core);
203 * The LDO ramp-up is based on 64 clock cycles of 24 MHz = 2.6 us per
211 static void imx_set_wdog_powerdown(bool enable)
213 struct wdog_regs *wdog1 = (struct wdog_regs *)WDOG1_BASE_ADDR;
214 struct wdog_regs *wdog2 = (struct wdog_regs *)WDOG2_BASE_ADDR;
216 /* Write to the PDE (Power Down Enable) bit */
217 writew(enable, &wdog1->wmcr);
218 writew(enable, &wdog2->wmcr);
221 static void set_ahb_rate(u32 val)
223 struct mxc_ccm_reg *mxc_ccm = (struct mxc_ccm_reg *)CCM_BASE_ADDR;
226 div = get_periph_clk() / val - 1;
227 reg = readl(&mxc_ccm->cbcdr);
229 writel((reg & (~MXC_CCM_CBCDR_AHB_PODF_MASK)) |
230 (div << MXC_CCM_CBCDR_AHB_PODF_OFFSET), &mxc_ccm->cbcdr);
233 static void clear_mmdc_ch_mask(void)
235 struct mxc_ccm_reg *mxc_ccm = (struct mxc_ccm_reg *)CCM_BASE_ADDR;
237 /* Clear MMDC channel mask */
238 writel(0, &mxc_ccm->ccdr);
241 int arch_cpu_init(void)
245 /* Need to clear MMDC_CHx_MASK to make warm reset work. */
246 clear_mmdc_ch_mask();
249 * When low freq boot is enabled, ROM will not set AHB
250 * freq, so we need to ensure AHB freq is 132MHz in such
253 if (mxc_get_clock(MXC_ARM_CLK) == 396000000)
254 set_ahb_rate(132000000);
256 imx_set_wdog_powerdown(false); /* Disable PDE bit of WMCR register */
258 #ifdef CONFIG_APBH_DMA
266 int board_postclk_init(void)
268 set_ldo_voltage(LDO_SOC, 1175); /* Set VDDSOC to 1.175V */
273 #ifndef CONFIG_SYS_DCACHE_OFF
274 void enable_caches(void)
276 #if defined(CONFIG_SYS_ARM_CACHE_WRITETHROUGH)
277 enum dcache_option option = DCACHE_WRITETHROUGH;
279 enum dcache_option option = DCACHE_WRITEBACK;
282 /* Avoid random hang when download by usb */
283 invalidate_dcache_all();
285 /* Enable D-cache. I-cache is already enabled in start.S */
288 /* Enable caching on OCRAM and ROM */
289 mmu_set_region_dcache_behaviour(ROMCP_ARB_BASE_ADDR,
292 mmu_set_region_dcache_behaviour(IRAM_BASE_ADDR,
298 #if defined(CONFIG_FEC_MXC)
299 void imx_get_mac_from_fuse(int dev_id, unsigned char *mac)
301 struct ocotp_regs *ocotp = (struct ocotp_regs *)OCOTP_BASE_ADDR;
302 struct fuse_bank *bank = &ocotp->bank[4];
303 struct fuse_bank4_regs *fuse =
304 (struct fuse_bank4_regs *)bank->fuse_regs;
306 u32 value = readl(&fuse->mac_addr_high);
307 mac[0] = (value >> 8);
310 value = readl(&fuse->mac_addr_low);
311 mac[2] = value >> 24 ;
312 mac[3] = value >> 16 ;
313 mac[4] = value >> 8 ;
319 void boot_mode_apply(unsigned cfg_val)
322 struct src *psrc = (struct src *)SRC_BASE_ADDR;
323 writel(cfg_val, &psrc->gpr9);
324 reg = readl(&psrc->gpr10);
329 writel(reg, &psrc->gpr10);
332 * cfg_val will be used for
333 * Boot_cfg4[7:0]:Boot_cfg3[7:0]:Boot_cfg2[7:0]:Boot_cfg1[7:0]
334 * After reset, if GPR10[28] is 1, ROM will copy GPR9[25:0]
335 * to SBMR1, which will determine the boot device.
337 const struct boot_mode soc_boot_modes[] = {
338 {"normal", MAKE_CFGVAL(0x00, 0x00, 0x00, 0x00)},
339 /* reserved value should start rom usb */
340 {"usb", MAKE_CFGVAL(0x01, 0x00, 0x00, 0x00)},
341 {"sata", MAKE_CFGVAL(0x20, 0x00, 0x00, 0x00)},
342 {"ecspi1:0", MAKE_CFGVAL(0x30, 0x00, 0x00, 0x08)},
343 {"ecspi1:1", MAKE_CFGVAL(0x30, 0x00, 0x00, 0x18)},
344 {"ecspi1:2", MAKE_CFGVAL(0x30, 0x00, 0x00, 0x28)},
345 {"ecspi1:3", MAKE_CFGVAL(0x30, 0x00, 0x00, 0x38)},
346 /* 4 bit bus width */
347 {"esdhc1", MAKE_CFGVAL(0x40, 0x20, 0x00, 0x00)},
348 {"esdhc2", MAKE_CFGVAL(0x40, 0x28, 0x00, 0x00)},
349 {"esdhc3", MAKE_CFGVAL(0x40, 0x30, 0x00, 0x00)},
350 {"esdhc4", MAKE_CFGVAL(0x40, 0x38, 0x00, 0x00)},
356 struct anatop_regs *anatop = (struct anatop_regs *)ANATOP_BASE_ADDR;
357 struct mxc_ccm_reg *ccm = (struct mxc_ccm_reg *)CCM_BASE_ADDR;
360 u32 reg, periph1, periph2;
362 if (is_cpu_type(MXC_CPU_MX6SX))
365 /* Due to hardware limitation, on MX6Q we need to gate/ungate all PFDs
366 * to make sure PFD is working right, otherwise, PFDs may
367 * not output clock after reset, MX6DL and MX6SL have added 396M pfd
368 * workaround in ROM code, as bus clock need it
371 mask480 = ANATOP_PFD_CLKGATE_MASK(0) |
372 ANATOP_PFD_CLKGATE_MASK(1) |
373 ANATOP_PFD_CLKGATE_MASK(2) |
374 ANATOP_PFD_CLKGATE_MASK(3);
375 mask528 = ANATOP_PFD_CLKGATE_MASK(1) |
376 ANATOP_PFD_CLKGATE_MASK(3);
378 reg = readl(&ccm->cbcmr);
379 periph2 = ((reg & MXC_CCM_CBCMR_PRE_PERIPH2_CLK_SEL_MASK)
380 >> MXC_CCM_CBCMR_PRE_PERIPH2_CLK_SEL_OFFSET);
381 periph1 = ((reg & MXC_CCM_CBCMR_PRE_PERIPH_CLK_SEL_MASK)
382 >> MXC_CCM_CBCMR_PRE_PERIPH_CLK_SEL_OFFSET);
384 /* Checking if PLL2 PFD0 or PLL2 PFD2 is using for periph clock */
385 if ((periph2 != 0x2) && (periph1 != 0x2))
386 mask528 |= ANATOP_PFD_CLKGATE_MASK(0);
388 if ((periph2 != 0x1) && (periph1 != 0x1) &&
389 (periph2 != 0x3) && (periph1 != 0x3))
390 mask528 |= ANATOP_PFD_CLKGATE_MASK(2);
392 writel(mask480, &anatop->pfd_480_set);
393 writel(mask528, &anatop->pfd_528_set);
394 writel(mask480, &anatop->pfd_480_clr);
395 writel(mask528, &anatop->pfd_528_clr);
398 #ifdef CONFIG_IMX_HDMI
399 void imx_enable_hdmi_phy(void)
401 struct hdmi_regs *hdmi = (struct hdmi_regs *)HDMI_ARB_BASE_ADDR;
403 reg = readb(&hdmi->phy_conf0);
404 reg |= HDMI_PHY_CONF0_PDZ_MASK;
405 writeb(reg, &hdmi->phy_conf0);
407 reg |= HDMI_PHY_CONF0_ENTMDS_MASK;
408 writeb(reg, &hdmi->phy_conf0);
410 reg |= HDMI_PHY_CONF0_GEN2_TXPWRON_MASK;
411 writeb(reg, &hdmi->phy_conf0);
412 writeb(HDMI_MC_PHYRSTZ_ASSERT, &hdmi->mc_phyrstz);
415 void imx_setup_hdmi(void)
417 struct mxc_ccm_reg *mxc_ccm = (struct mxc_ccm_reg *)CCM_BASE_ADDR;
418 struct hdmi_regs *hdmi = (struct hdmi_regs *)HDMI_ARB_BASE_ADDR;
421 /* Turn on HDMI PHY clock */
422 reg = readl(&mxc_ccm->CCGR2);
423 reg |= MXC_CCM_CCGR2_HDMI_TX_IAHBCLK_MASK|
424 MXC_CCM_CCGR2_HDMI_TX_ISFRCLK_MASK;
425 writel(reg, &mxc_ccm->CCGR2);
426 writeb(HDMI_MC_PHYRSTZ_DEASSERT, &hdmi->mc_phyrstz);
427 reg = readl(&mxc_ccm->chsccdr);
428 reg &= ~(MXC_CCM_CHSCCDR_IPU1_DI0_PRE_CLK_SEL_MASK|
429 MXC_CCM_CHSCCDR_IPU1_DI0_PODF_MASK|
430 MXC_CCM_CHSCCDR_IPU1_DI0_CLK_SEL_MASK);
431 reg |= (CHSCCDR_PODF_DIVIDE_BY_3
432 << MXC_CCM_CHSCCDR_IPU1_DI0_PODF_OFFSET)
433 |(CHSCCDR_IPU_PRE_CLK_540M_PFD
434 << MXC_CCM_CHSCCDR_IPU1_DI0_PRE_CLK_SEL_OFFSET);
435 writel(reg, &mxc_ccm->chsccdr);
439 #ifndef CONFIG_SYS_L2CACHE_OFF
440 #define IOMUXC_GPR11_L2CACHE_AS_OCRAM 0x00000002
441 void v7_outer_cache_enable(void)
443 struct pl310_regs *const pl310 = (struct pl310_regs *)L2_PL310_BASE;
446 #if defined CONFIG_MX6SL
447 struct iomuxc *iomux = (struct iomuxc *)IOMUXC_BASE_ADDR;
448 val = readl(&iomux->gpr[11]);
449 if (val & IOMUXC_GPR11_L2CACHE_AS_OCRAM) {
450 /* L2 cache configured as OCRAM, reset it */
451 val &= ~IOMUXC_GPR11_L2CACHE_AS_OCRAM;
452 writel(val, &iomux->gpr[11]);
456 /* Must disable the L2 before changing the latency parameters */
457 clrbits_le32(&pl310->pl310_ctrl, L2X0_CTRL_EN);
459 writel(0x132, &pl310->pl310_tag_latency_ctrl);
460 writel(0x132, &pl310->pl310_data_latency_ctrl);
462 val = readl(&pl310->pl310_prefetch_ctrl);
464 /* Turn on the L2 I/D prefetch */
468 * The L2 cache controller(PL310) version on the i.MX6D/Q is r3p1-50rel0
469 * The L2 cache controller(PL310) version on the i.MX6DL/SOLO/SL is r3p2
470 * But according to ARM PL310 errata: 752271
471 * ID: 752271: Double linefill feature can cause data corruption
472 * Fault Status: Present in: r3p0, r3p1, r3p1-50rel0. Fixed in r3p2
473 * Workaround: The only workaround to this erratum is to disable the
474 * double linefill feature. This is the default behavior.
480 writel(val, &pl310->pl310_prefetch_ctrl);
482 val = readl(&pl310->pl310_power_ctrl);
483 val |= L2X0_DYNAMIC_CLK_GATING_EN;
484 val |= L2X0_STNDBY_MODE_EN;
485 writel(val, &pl310->pl310_power_ctrl);
487 setbits_le32(&pl310->pl310_ctrl, L2X0_CTRL_EN);
490 void v7_outer_cache_disable(void)
492 struct pl310_regs *const pl310 = (struct pl310_regs *)L2_PL310_BASE;
494 clrbits_le32(&pl310->pl310_ctrl, L2X0_CTRL_EN);
496 #endif /* !CONFIG_SYS_L2CACHE_OFF */