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u-boot/drivers/reset/reset-imx7.c
Marek Vasut 0be4b0b651 reset: Return 0 if ops unimplemented and remove empty functions 
In case the ops is not implemented, return 0 in the core right away.
This is better than having multiple copies of functions which just
return 0 in each reset driver. Drop all those empty functions.

Signed-off-by: Marek Vasut <marex@denx.de>
Cc: Simon Glass <sjg@chromium.org>
Cc: Tom Rini <trini@konsulko.com>
2022-05-05 19:37:11 -04:00

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9.8 KiB
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// SPDX-License-Identifier: GPL-2.0
/*
* Copyright (c) 2017, Impinj, Inc.
*/
#include <log.h>
#include <malloc.h>
#include <asm/io.h>
#include <common.h>
#include <dm.h>
#include <dt-bindings/reset/imx7-reset.h>
#include <dt-bindings/reset/imx8mq-reset.h>
#include <reset-uclass.h>
#include <linux/bitops.h>
#include <linux/delay.h>
struct imx7_reset_priv {
void __iomem *base;
struct reset_ops ops;
};
struct imx7_src_signal {
unsigned int offset, bit;
};
enum imx7_src_registers {
SRC_A7RCR0 = 0x0004,
SRC_M4RCR = 0x000c,
SRC_ERCR = 0x0014,
SRC_HSICPHY_RCR = 0x001c,
SRC_USBOPHY1_RCR = 0x0020,
SRC_USBOPHY2_RCR = 0x0024,
SRC_MIPIPHY_RCR = 0x0028,
SRC_PCIEPHY_RCR = 0x002c,
SRC_DDRC_RCR = 0x1000,
};
static const struct imx7_src_signal imx7_src_signals[IMX7_RESET_NUM] = {
[IMX7_RESET_A7_CORE_POR_RESET0] = { SRC_A7RCR0, BIT(0) },
[IMX7_RESET_A7_CORE_POR_RESET1] = { SRC_A7RCR0, BIT(1) },
[IMX7_RESET_A7_CORE_RESET0] = { SRC_A7RCR0, BIT(4) },
[IMX7_RESET_A7_CORE_RESET1] = { SRC_A7RCR0, BIT(5) },
[IMX7_RESET_A7_DBG_RESET0] = { SRC_A7RCR0, BIT(8) },
[IMX7_RESET_A7_DBG_RESET1] = { SRC_A7RCR0, BIT(9) },
[IMX7_RESET_A7_ETM_RESET0] = { SRC_A7RCR0, BIT(12) },
[IMX7_RESET_A7_ETM_RESET1] = { SRC_A7RCR0, BIT(13) },
[IMX7_RESET_A7_SOC_DBG_RESET] = { SRC_A7RCR0, BIT(20) },
[IMX7_RESET_A7_L2RESET] = { SRC_A7RCR0, BIT(21) },
[IMX7_RESET_SW_M4C_RST] = { SRC_M4RCR, BIT(1) },
[IMX7_RESET_SW_M4P_RST] = { SRC_M4RCR, BIT(2) },
[IMX7_RESET_EIM_RST] = { SRC_ERCR, BIT(0) },
[IMX7_RESET_HSICPHY_PORT_RST] = { SRC_HSICPHY_RCR, BIT(1) },
[IMX7_RESET_USBPHY1_POR] = { SRC_USBOPHY1_RCR, BIT(0) },
[IMX7_RESET_USBPHY1_PORT_RST] = { SRC_USBOPHY1_RCR, BIT(1) },
[IMX7_RESET_USBPHY2_POR] = { SRC_USBOPHY2_RCR, BIT(0) },
[IMX7_RESET_USBPHY2_PORT_RST] = { SRC_USBOPHY2_RCR, BIT(1) },
[IMX7_RESET_MIPI_PHY_MRST] = { SRC_MIPIPHY_RCR, BIT(1) },
[IMX7_RESET_MIPI_PHY_SRST] = { SRC_MIPIPHY_RCR, BIT(2) },
[IMX7_RESET_PCIEPHY] = { SRC_PCIEPHY_RCR, BIT(2) | BIT(1) },
[IMX7_RESET_PCIEPHY_PERST] = { SRC_PCIEPHY_RCR, BIT(3) },
[IMX7_RESET_PCIE_CTRL_APPS_EN] = { SRC_PCIEPHY_RCR, BIT(6) },
[IMX7_RESET_PCIE_CTRL_APPS_TURNOFF] = { SRC_PCIEPHY_RCR, BIT(11) },
[IMX7_RESET_DDRC_PRST] = { SRC_DDRC_RCR, BIT(0) },
[IMX7_RESET_DDRC_CORE_RST] = { SRC_DDRC_RCR, BIT(1) },
};
static int imx7_reset_deassert_imx7(struct reset_ctl *rst)
{
struct imx7_reset_priv *priv = dev_get_priv(rst->dev);
const struct imx7_src_signal *sig = imx7_src_signals;
u32 val;
if (rst->id >= IMX7_RESET_NUM)
return -EINVAL;
if (rst->id == IMX7_RESET_PCIEPHY) {
/*
* wait for more than 10us to release phy g_rst and
* btnrst
*/
udelay(10);
}
val = readl(priv->base + sig[rst->id].offset);
switch (rst->id) {
case IMX7_RESET_PCIE_CTRL_APPS_EN:
val |= sig[rst->id].bit;
break;
default:
val &= ~sig[rst->id].bit;
break;
}
writel(val, priv->base + sig[rst->id].offset);
return 0;
}
static int imx7_reset_assert_imx7(struct reset_ctl *rst)
{
struct imx7_reset_priv *priv = dev_get_priv(rst->dev);
const struct imx7_src_signal *sig = imx7_src_signals;
u32 val;
if (rst->id >= IMX7_RESET_NUM)
return -EINVAL;
val = readl(priv->base + sig[rst->id].offset);
switch (rst->id) {
case IMX7_RESET_PCIE_CTRL_APPS_EN:
val &= ~sig[rst->id].bit;
break;
default:
val |= sig[rst->id].bit;
break;
}
writel(val, priv->base + sig[rst->id].offset);
return 0;
}
enum imx8mq_src_registers {
SRC_A53RCR0 = 0x0004,
SRC_HDMI_RCR = 0x0030,
SRC_DISP_RCR = 0x0034,
SRC_GPU_RCR = 0x0040,
SRC_VPU_RCR = 0x0044,
SRC_PCIE2_RCR = 0x0048,
SRC_MIPIPHY1_RCR = 0x004c,
SRC_MIPIPHY2_RCR = 0x0050,
SRC_DDRC2_RCR = 0x1004,
};
static const struct imx7_src_signal imx8mq_src_signals[IMX8MQ_RESET_NUM] = {
[IMX8MQ_RESET_A53_CORE_POR_RESET0] = { SRC_A53RCR0, BIT(0) },
[IMX8MQ_RESET_A53_CORE_POR_RESET1] = { SRC_A53RCR0, BIT(1) },
[IMX8MQ_RESET_A53_CORE_POR_RESET2] = { SRC_A53RCR0, BIT(2) },
[IMX8MQ_RESET_A53_CORE_POR_RESET3] = { SRC_A53RCR0, BIT(3) },
[IMX8MQ_RESET_A53_CORE_RESET0] = { SRC_A53RCR0, BIT(4) },
[IMX8MQ_RESET_A53_CORE_RESET1] = { SRC_A53RCR0, BIT(5) },
[IMX8MQ_RESET_A53_CORE_RESET2] = { SRC_A53RCR0, BIT(6) },
[IMX8MQ_RESET_A53_CORE_RESET3] = { SRC_A53RCR0, BIT(7) },
[IMX8MQ_RESET_A53_DBG_RESET0] = { SRC_A53RCR0, BIT(8) },
[IMX8MQ_RESET_A53_DBG_RESET1] = { SRC_A53RCR0, BIT(9) },
[IMX8MQ_RESET_A53_DBG_RESET2] = { SRC_A53RCR0, BIT(10) },
[IMX8MQ_RESET_A53_DBG_RESET3] = { SRC_A53RCR0, BIT(11) },
[IMX8MQ_RESET_A53_ETM_RESET0] = { SRC_A53RCR0, BIT(12) },
[IMX8MQ_RESET_A53_ETM_RESET1] = { SRC_A53RCR0, BIT(13) },
[IMX8MQ_RESET_A53_ETM_RESET2] = { SRC_A53RCR0, BIT(14) },
[IMX8MQ_RESET_A53_ETM_RESET3] = { SRC_A53RCR0, BIT(15) },
[IMX8MQ_RESET_A53_SOC_DBG_RESET] = { SRC_A53RCR0, BIT(20) },
[IMX8MQ_RESET_A53_L2RESET] = { SRC_A53RCR0, BIT(21) },
[IMX8MQ_RESET_SW_NON_SCLR_M4C_RST] = { SRC_M4RCR, BIT(0) },
[IMX8MQ_RESET_OTG1_PHY_RESET] = { SRC_USBOPHY1_RCR, BIT(0) },
[IMX8MQ_RESET_OTG2_PHY_RESET] = { SRC_USBOPHY2_RCR, BIT(0) },
[IMX8MQ_RESET_MIPI_DSI_RESET_BYTE_N] = { SRC_MIPIPHY_RCR, BIT(1) },
[IMX8MQ_RESET_MIPI_DSI_RESET_N] = { SRC_MIPIPHY_RCR, BIT(2) },
[IMX8MQ_RESET_MIPI_DSI_DPI_RESET_N] = { SRC_MIPIPHY_RCR, BIT(3) },
[IMX8MQ_RESET_MIPI_DSI_ESC_RESET_N] = { SRC_MIPIPHY_RCR, BIT(4) },
[IMX8MQ_RESET_MIPI_DSI_PCLK_RESET_N] = { SRC_MIPIPHY_RCR, BIT(5) },
[IMX8MQ_RESET_PCIEPHY] = { SRC_PCIEPHY_RCR,
BIT(2) | BIT(1) },
[IMX8MQ_RESET_PCIEPHY_PERST] = { SRC_PCIEPHY_RCR, BIT(3) },
[IMX8MQ_RESET_PCIE_CTRL_APPS_EN] = { SRC_PCIEPHY_RCR, BIT(6) },
[IMX8MQ_RESET_PCIE_CTRL_APPS_TURNOFF] = { SRC_PCIEPHY_RCR, BIT(11) },
[IMX8MQ_RESET_HDMI_PHY_APB_RESET] = { SRC_HDMI_RCR, BIT(0) },
[IMX8MQ_RESET_DISP_RESET] = { SRC_DISP_RCR, BIT(0) },
[IMX8MQ_RESET_GPU_RESET] = { SRC_GPU_RCR, BIT(0) },
[IMX8MQ_RESET_VPU_RESET] = { SRC_VPU_RCR, BIT(0) },
[IMX8MQ_RESET_PCIEPHY2] = { SRC_PCIE2_RCR,
BIT(2) | BIT(1) },
[IMX8MQ_RESET_PCIEPHY2_PERST] = { SRC_PCIE2_RCR, BIT(3) },
[IMX8MQ_RESET_PCIE2_CTRL_APPS_EN] = { SRC_PCIE2_RCR, BIT(6) },
[IMX8MQ_RESET_PCIE2_CTRL_APPS_TURNOFF] = { SRC_PCIE2_RCR, BIT(11) },
[IMX8MQ_RESET_MIPI_CSI1_CORE_RESET] = { SRC_MIPIPHY1_RCR, BIT(0) },
[IMX8MQ_RESET_MIPI_CSI1_PHY_REF_RESET] = { SRC_MIPIPHY1_RCR, BIT(1) },
[IMX8MQ_RESET_MIPI_CSI1_ESC_RESET] = { SRC_MIPIPHY1_RCR, BIT(2) },
[IMX8MQ_RESET_MIPI_CSI2_CORE_RESET] = { SRC_MIPIPHY2_RCR, BIT(0) },
[IMX8MQ_RESET_MIPI_CSI2_PHY_REF_RESET] = { SRC_MIPIPHY2_RCR, BIT(1) },
[IMX8MQ_RESET_MIPI_CSI2_ESC_RESET] = { SRC_MIPIPHY2_RCR, BIT(2) },
[IMX8MQ_RESET_DDRC1_PRST] = { SRC_DDRC_RCR, BIT(0) },
[IMX8MQ_RESET_DDRC1_CORE_RESET] = { SRC_DDRC_RCR, BIT(1) },
[IMX8MQ_RESET_DDRC1_PHY_RESET] = { SRC_DDRC_RCR, BIT(2) },
[IMX8MQ_RESET_DDRC2_PHY_RESET] = { SRC_DDRC2_RCR, BIT(0) },
[IMX8MQ_RESET_DDRC2_CORE_RESET] = { SRC_DDRC2_RCR, BIT(1) },
[IMX8MQ_RESET_DDRC2_PRST] = { SRC_DDRC2_RCR, BIT(2) },
};
static int imx7_reset_deassert_imx8mq(struct reset_ctl *rst)
{
struct imx7_reset_priv *priv = dev_get_priv(rst->dev);
const struct imx7_src_signal *sig = imx8mq_src_signals;
u32 val;
if (rst->id >= IMX8MQ_RESET_NUM)
return -EINVAL;
if (rst->id == IMX8MQ_RESET_PCIEPHY ||
rst->id == IMX8MQ_RESET_PCIEPHY2) {
/*
* wait for more than 10us to release phy g_rst and
* btnrst
*/
udelay(10);
}
val = readl(priv->base + sig[rst->id].offset);
switch (rst->id) {
case IMX8MQ_RESET_PCIE_CTRL_APPS_EN:
case IMX8MQ_RESET_PCIE2_CTRL_APPS_EN: /* fallthrough */
case IMX8MQ_RESET_MIPI_DSI_PCLK_RESET_N: /* fallthrough */
case IMX8MQ_RESET_MIPI_DSI_ESC_RESET_N: /* fallthrough */
case IMX8MQ_RESET_MIPI_DSI_DPI_RESET_N: /* fallthrough */
case IMX8MQ_RESET_MIPI_DSI_RESET_N: /* fallthrough */
case IMX8MQ_RESET_MIPI_DSI_RESET_BYTE_N: /* fallthrough */
val |= sig[rst->id].bit;
break;
default:
val &= ~sig[rst->id].bit;
break;
}
writel(val, priv->base + sig[rst->id].offset);
return 0;
}
static int imx7_reset_assert_imx8mq(struct reset_ctl *rst)
{
struct imx7_reset_priv *priv = dev_get_priv(rst->dev);
const struct imx7_src_signal *sig = imx8mq_src_signals;
u32 val;
if (rst->id >= IMX8MQ_RESET_NUM)
return -EINVAL;
val = readl(priv->base + sig[rst->id].offset);
switch (rst->id) {
case IMX8MQ_RESET_PCIE_CTRL_APPS_EN:
case IMX8MQ_RESET_PCIE2_CTRL_APPS_EN: /* fallthrough */
case IMX8MQ_RESET_MIPI_DSI_PCLK_RESET_N: /* fallthrough */
case IMX8MQ_RESET_MIPI_DSI_ESC_RESET_N: /* fallthrough */
case IMX8MQ_RESET_MIPI_DSI_DPI_RESET_N: /* fallthrough */
case IMX8MQ_RESET_MIPI_DSI_RESET_N: /* fallthrough */
case IMX8MQ_RESET_MIPI_DSI_RESET_BYTE_N: /* fallthrough */
val &= ~sig[rst->id].bit;
break;
default:
val |= sig[rst->id].bit;
break;
}
writel(val, priv->base + sig[rst->id].offset);
return 0;
}
static int imx7_reset_assert(struct reset_ctl *rst)
{
struct imx7_reset_priv *priv = dev_get_priv(rst->dev);
return priv->ops.rst_assert(rst);
}
static int imx7_reset_deassert(struct reset_ctl *rst)
{
struct imx7_reset_priv *priv = dev_get_priv(rst->dev);
return priv->ops.rst_deassert(rst);
}
static const struct reset_ops imx7_reset_reset_ops = {
.rst_assert = imx7_reset_assert,
.rst_deassert = imx7_reset_deassert,
};
static const struct udevice_id imx7_reset_ids[] = {
{ .compatible = "fsl,imx7d-src" },
{ .compatible = "fsl,imx8mq-src" },
{ }
};
static int imx7_reset_probe(struct udevice *dev)
{
struct imx7_reset_priv *priv = dev_get_priv(dev);
priv->base = dev_remap_addr(dev);
if (!priv->base)
return -ENOMEM;
if (device_is_compatible(dev, "fsl,imx8mq-src")) {
priv->ops.rst_assert = imx7_reset_assert_imx8mq;
priv->ops.rst_deassert = imx7_reset_deassert_imx8mq;
} else if (device_is_compatible(dev, "fsl,imx7d-src")) {
priv->ops.rst_assert = imx7_reset_assert_imx7;
priv->ops.rst_deassert = imx7_reset_deassert_imx7;
}
return 0;
}
U_BOOT_DRIVER(imx7_reset) = {
.name = "imx7_reset",
.id = UCLASS_RESET,
.of_match = imx7_reset_ids,
.ops = &imx7_reset_reset_ops,
.probe = imx7_reset_probe,
.priv_auto = sizeof(struct imx7_reset_priv),
};
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