| /* |
| * Copyright (C) 2013-2016 Freescale Semiconductor, Inc. |
| * |
| * The code contained herein is licensed under the GNU General Public |
| * License. You may obtain a copy of the GNU General Public License |
| * Version 2 or later at the following locations: |
| * |
| * http://www.opensource.org/licenses/gpl-license.html |
| * http://www.gnu.org/copyleft/gpl.html |
| */ |
| |
| #include <linux/delay.h> |
| #include <linux/err.h> |
| #include <linux/io.h> |
| #include <linux/of.h> |
| #include <linux/of_address.h> |
| #include <linux/mfd/syscon.h> |
| #include <linux/regmap.h> |
| #include "common.h" |
| #include "hardware.h" |
| |
| #define REG_SET 0x4 |
| #define REG_CLR 0x8 |
| |
| #define ANADIG_ARM_PLL 0x60 |
| #define ANADIG_DDR_PLL 0x70 |
| #define ANADIG_SYS_PLL 0xb0 |
| #define ANADIG_ENET_PLL 0xe0 |
| #define ANADIG_AUDIO_PLL 0xf0 |
| #define ANADIG_VIDEO_PLL 0x130 |
| |
| #define ANADIG_REG_2P5 0x130 |
| #define ANADIG_REG_CORE 0x140 |
| #define ANADIG_ANA_MISC0 0x150 |
| #define ANADIG_ANA_MISC2 0x170 |
| #define ANADIG_USB1_CHRG_DETECT 0x1b0 |
| #define ANADIG_USB2_CHRG_DETECT 0x210 |
| #define ANADIG_DIGPROG 0x260 |
| #define ANADIG_DIGPROG_IMX6SL 0x280 |
| #define ANADIG_DIGPROG_IMX7D 0x800 |
| |
| #define BM_ANADIG_REG_2P5_ENABLE_WEAK_LINREG 0x40000 |
| #define BM_ANADIG_REG_2P5_ENABLE_PULLDOWN 0x8 |
| #define BM_ANADIG_REG_CORE_FET_ODRIVE 0x20000000 |
| #define BM_ANADIG_REG_CORE_REG1 (0x1f << 9) |
| #define BM_ANADIG_REG_CORE_REG2 (0x1f << 18) |
| #define BP_ANADIG_REG_CORE_REG2 (18) |
| #define BM_ANADIG_ANA_MISC0_STOP_MODE_CONFIG 0x1000 |
| #define BM_ANADIG_ANA_MISC0_V2_STOP_MODE_CONFIG 0x800 |
| #define BM_ANADIG_ANA_MISC0_V3_STOP_MODE_CONFIG 0xc00 |
| #define BM_ANADIG_ANA_MISC2_REG1_STEP_TIME (0x3 << 26) |
| #define BP_ANADIG_ANA_MISC2_REG1_STEP_TIME (26) |
| /* Below MISC0_DISCON_HIGH_SNVS is only for i.MX6SL */ |
| #define BM_ANADIG_ANA_MISC0_DISCON_HIGH_SNVS 0x2000 |
| /* Since i.MX6SX, DISCON_HIGH_SNVS is changed to bit 12 */ |
| #define BM_ANADIG_ANA_MISC0_V2_DISCON_HIGH_SNVS 0x1000 |
| #define BM_ANADIG_USB_CHRG_DETECT_CHK_CHRG_B 0x80000 |
| #define BM_ANADIG_USB_CHRG_DETECT_EN_B 0x100000 |
| |
| #define LDO_RAMP_UP_UNIT_IN_CYCLES 64 /* 64 cycles per step */ |
| #define LDO_RAMP_UP_FREQ_IN_MHZ 24 /* cycle based on 24M OSC */ |
| |
| static struct regmap *anatop; |
| |
| static void imx_anatop_enable_weak2p5(bool enable) |
| { |
| u32 reg, val, mask; |
| |
| regmap_read(anatop, ANADIG_ANA_MISC0, &val); |
| |
| if (cpu_is_imx6sx() || cpu_is_imx6ul()) |
| mask = BM_ANADIG_ANA_MISC0_V3_STOP_MODE_CONFIG; |
| else if (cpu_is_imx6sl()) |
| mask = BM_ANADIG_ANA_MISC0_V2_STOP_MODE_CONFIG; |
| else |
| mask = BM_ANADIG_ANA_MISC0_STOP_MODE_CONFIG; |
| |
| /* can only be enabled when stop_mode_config is clear. */ |
| reg = ANADIG_REG_2P5; |
| reg += (enable && (val & mask) == 0) ? REG_SET : REG_CLR; |
| regmap_write(anatop, reg, BM_ANADIG_REG_2P5_ENABLE_WEAK_LINREG); |
| } |
| |
| static void imx_anatop_enable_fet_odrive(bool enable) |
| { |
| regmap_write(anatop, ANADIG_REG_CORE + (enable ? REG_SET : REG_CLR), |
| BM_ANADIG_REG_CORE_FET_ODRIVE); |
| } |
| |
| static inline void imx_anatop_enable_2p5_pulldown(bool enable) |
| { |
| regmap_write(anatop, ANADIG_REG_2P5 + (enable ? REG_SET : REG_CLR), |
| BM_ANADIG_REG_2P5_ENABLE_PULLDOWN); |
| } |
| |
| static inline void imx_anatop_disconnect_high_snvs(bool enable) |
| { |
| if (cpu_is_imx6sx() || cpu_is_imx6ul()) |
| regmap_write(anatop, ANADIG_ANA_MISC0 + |
| (enable ? REG_SET : REG_CLR), |
| BM_ANADIG_ANA_MISC0_V2_DISCON_HIGH_SNVS); |
| else |
| regmap_write(anatop, ANADIG_ANA_MISC0 + |
| (enable ? REG_SET : REG_CLR), |
| BM_ANADIG_ANA_MISC0_DISCON_HIGH_SNVS); |
| } |
| |
| static void imx_anatop_disable_pu(bool off) |
| { |
| u32 val, soc, delay; |
| if (off) { |
| regmap_read(anatop, ANADIG_REG_CORE, &val); |
| val &= ~BM_ANADIG_REG_CORE_REG1; |
| regmap_write(anatop, ANADIG_REG_CORE, val); |
| } else { |
| /* track vddpu with vddsoc */ |
| regmap_read(anatop, ANADIG_REG_CORE, &val); |
| soc = val & BM_ANADIG_REG_CORE_REG2; |
| val &= ~BM_ANADIG_REG_CORE_REG1; |
| val |= soc >> 9; |
| regmap_write(anatop, ANADIG_REG_CORE, val); |
| /* wait PU LDO ramp */ |
| regmap_read(anatop, ANADIG_ANA_MISC2, &val); |
| val &= BM_ANADIG_ANA_MISC2_REG1_STEP_TIME; |
| val >>= BP_ANADIG_ANA_MISC2_REG1_STEP_TIME; |
| delay = (soc >> BP_ANADIG_REG_CORE_REG2) * |
| (LDO_RAMP_UP_UNIT_IN_CYCLES << val) / |
| LDO_RAMP_UP_FREQ_IN_MHZ + 1; |
| udelay(delay); |
| } |
| } |
| |
| void imx_anatop_pre_suspend(void) |
| { |
| if (cpu_is_imx7d()) { |
| /* PLL and PFDs overwrite set */ |
| regmap_write(anatop, ANADIG_ARM_PLL + REG_SET, 1 << 20); |
| regmap_write(anatop, ANADIG_DDR_PLL + REG_SET, 1 << 19); |
| regmap_write(anatop, ANADIG_SYS_PLL + REG_SET, 0x1ff << 17); |
| regmap_write(anatop, ANADIG_ENET_PLL + REG_SET, 1 << 13); |
| regmap_write(anatop, ANADIG_AUDIO_PLL + REG_SET, 1 << 24); |
| regmap_write(anatop, ANADIG_VIDEO_PLL + REG_SET, 1 << 24); |
| return; |
| } |
| |
| if (cpu_is_imx6q() && imx_get_soc_revision() == IMX_CHIP_REVISION_2_0) |
| imx_anatop_disable_pu(true); |
| |
| if ((imx_mmdc_get_ddr_type() == IMX_DDR_TYPE_LPDDR2) && |
| !imx_gpc_usb_wakeup_enabled()) |
| imx_anatop_enable_2p5_pulldown(true); |
| else |
| imx_anatop_enable_weak2p5(true); |
| |
| imx_anatop_enable_fet_odrive(true); |
| |
| if (cpu_is_imx6sl() || cpu_is_imx6sx() || cpu_is_imx6ul()) |
| imx_anatop_disconnect_high_snvs(true); |
| } |
| |
| void imx_anatop_post_resume(void) |
| { |
| if (cpu_is_imx7d()) { |
| /* PLL and PFDs overwrite clear */ |
| regmap_write(anatop, ANADIG_ARM_PLL + REG_CLR, 1 << 20); |
| regmap_write(anatop, ANADIG_DDR_PLL + REG_CLR, 1 << 19); |
| regmap_write(anatop, ANADIG_SYS_PLL + REG_CLR, 0x1ff << 17); |
| regmap_write(anatop, ANADIG_ENET_PLL + REG_CLR, 1 << 13); |
| regmap_write(anatop, ANADIG_AUDIO_PLL + REG_CLR, 1 << 24); |
| regmap_write(anatop, ANADIG_VIDEO_PLL + REG_CLR, 1 << 24); |
| return; |
| } |
| |
| if (cpu_is_imx6q() && imx_get_soc_revision() == IMX_CHIP_REVISION_2_0) |
| imx_anatop_disable_pu(false); |
| |
| if ((imx_mmdc_get_ddr_type() == IMX_DDR_TYPE_LPDDR2) && |
| !imx_gpc_usb_wakeup_enabled()) |
| imx_anatop_enable_2p5_pulldown(false); |
| else |
| imx_anatop_enable_weak2p5(false); |
| |
| imx_anatop_enable_fet_odrive(false); |
| |
| if (cpu_is_imx6sl() || cpu_is_imx6sx() || cpu_is_imx6ul()) |
| imx_anatop_disconnect_high_snvs(false); |
| |
| } |
| |
| static void imx_anatop_usb_chrg_detect_disable(void) |
| { |
| regmap_write(anatop, ANADIG_USB1_CHRG_DETECT, |
| BM_ANADIG_USB_CHRG_DETECT_EN_B |
| | BM_ANADIG_USB_CHRG_DETECT_CHK_CHRG_B); |
| regmap_write(anatop, ANADIG_USB2_CHRG_DETECT, |
| BM_ANADIG_USB_CHRG_DETECT_EN_B | |
| BM_ANADIG_USB_CHRG_DETECT_CHK_CHRG_B); |
| } |
| |
| void __init imx_init_revision_from_anatop(void) |
| { |
| struct device_node *np; |
| void __iomem *anatop_base; |
| unsigned int revision; |
| u32 digprog; |
| u16 offset = ANADIG_DIGPROG; |
| |
| np = of_find_compatible_node(NULL, NULL, "fsl,imx6q-anatop"); |
| anatop_base = of_iomap(np, 0); |
| WARN_ON(!anatop_base); |
| if (of_device_is_compatible(np, "fsl,imx6sl-anatop")) |
| offset = ANADIG_DIGPROG_IMX6SL; |
| if (of_device_is_compatible(np, "fsl,imx7d-anatop")) |
| offset = ANADIG_DIGPROG_IMX7D; |
| digprog = readl_relaxed(anatop_base + offset); |
| iounmap(anatop_base); |
| |
| switch (digprog & 0xff) { |
| case 0: |
| if (digprog >> 8 & 0x01) |
| revision = IMX_CHIP_REVISION_2_0; |
| else |
| revision = IMX_CHIP_REVISION_1_0; |
| break; |
| case 1: |
| revision = IMX_CHIP_REVISION_1_1; |
| break; |
| case 2: |
| revision = IMX_CHIP_REVISION_1_2; |
| break; |
| case 3: |
| revision = IMX_CHIP_REVISION_1_3; |
| break; |
| case 4: |
| revision = IMX_CHIP_REVISION_1_4; |
| break; |
| case 5: |
| /* |
| * i.MX6DQ TO1.5 is defined as Rev 1.3 in Data Sheet, marked |
| * as 'D' in Part Number last character. |
| */ |
| revision = IMX_CHIP_REVISION_1_5; |
| break; |
| default: |
| /* |
| * Fail back to return raw register value instead of 0xff. |
| * It will be easy know version information in SOC if it |
| * can't recongized by known version. And some chip like |
| * i.MX7D soc digprog value match linux version format, |
| * needn't map again and direct use register value. |
| */ |
| revision = digprog & 0xff; |
| } |
| |
| mxc_set_cpu_type(digprog >> 16 & 0xff); |
| imx_set_soc_revision(revision); |
| } |
| |
| void __init imx_anatop_init(void) |
| { |
| anatop = syscon_regmap_lookup_by_compatible("fsl,imx6q-anatop"); |
| if (IS_ERR(anatop)) { |
| pr_err("%s: failed to find imx6q-anatop regmap!\n", __func__); |
| return; |
| } |
| |
| imx_anatop_usb_chrg_detect_disable(); |
| } |