diff options
Diffstat (limited to 'arch/arm/mach-imx/anatop.c')
| -rw-r--r-- | arch/arm/mach-imx/anatop.c | 166 |
1 files changed, 166 insertions, 0 deletions
diff --git a/arch/arm/mach-imx/anatop.c b/arch/arm/mach-imx/anatop.c new file mode 100644 index 000000000..61f3d94f1 --- /dev/null +++ b/arch/arm/mach-imx/anatop.c @@ -0,0 +1,166 @@ +/* + * Copyright (C) 2013-2015 Freescale Semiconductor, Inc. + * Copyright 2017-2018 NXP. + * + * 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/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_REG_2P5 0x130 +#define ANADIG_REG_CORE 0x140 +#define ANADIG_ANA_MISC0 0x150 +#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_ANA_MISC0_STOP_MODE_CONFIG 0x1000 +/* Below MISC0_DISCON_HIGH_SNVS is only for i.MX6SL */ +#define BM_ANADIG_ANA_MISC0_DISCON_HIGH_SNVS 0x2000 +#define BM_ANADIG_USB_CHRG_DETECT_CHK_CHRG_B 0x80000 +#define BM_ANADIG_USB_CHRG_DETECT_EN_B 0x100000 + +static struct regmap *anatop; + +static void imx_anatop_enable_weak2p5(bool enable) +{ + u32 reg, val; + + regmap_read(anatop, ANADIG_ANA_MISC0, &val); + + /* can only be enabled when stop_mode_config is clear. */ + reg = ANADIG_REG_2P5; + reg += (enable && (val & BM_ANADIG_ANA_MISC0_STOP_MODE_CONFIG) == 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) +{ + regmap_write(anatop, ANADIG_ANA_MISC0 + (enable ? REG_SET : REG_CLR), + BM_ANADIG_ANA_MISC0_DISCON_HIGH_SNVS); +} + +void imx_anatop_pre_suspend(void) +{ + if (imx_mmdc_get_ddr_type() == IMX_DDR_TYPE_LPDDR2) + imx_anatop_enable_2p5_pulldown(true); + else + imx_anatop_enable_weak2p5(true); + + imx_anatop_enable_fet_odrive(true); + + if (cpu_is_imx6sl()) + imx_anatop_disconnect_high_snvs(true); +} + +void imx_anatop_post_resume(void) +{ + if (imx_mmdc_get_ddr_type() == IMX_DDR_TYPE_LPDDR2) + imx_anatop_enable_2p5_pulldown(false); + else + imx_anatop_enable_weak2p5(false); + + imx_anatop_enable_fet_odrive(false); + + if (cpu_is_imx6sl()) + 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; + u8 major_part, minor_part; + + 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); + + /* + * On i.MX7D digprog value match linux version format, so + * it needn't map again and we can use register value directly. + */ + if (of_device_is_compatible(np, "fsl,imx7d-anatop")) { + revision = digprog & 0xff; + } else { + /* + * MAJOR: [15:8], the major silicon revison; + * MINOR: [7: 0], the minor silicon revison; + * + * please refer to the i.MX RM for the detailed + * silicon revison bit define. + * format the major part and minor part to match the + * linux kernel soc version format. + */ + major_part = (digprog >> 8) & 0xf; + minor_part = digprog & 0xf; + revision = ((major_part + 1) << 4) | minor_part; + } + + 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(); +} |