diff options
Diffstat (limited to 'drivers/reset/reset-imx7.c')
| -rw-r--r-- | drivers/reset/reset-imx7.c | 312 |
1 files changed, 312 insertions, 0 deletions
diff --git a/drivers/reset/reset-imx7.c b/drivers/reset/reset-imx7.c new file mode 100644 index 0000000000..f2ca5cf801 --- /dev/null +++ b/drivers/reset/reset-imx7.c @@ -0,0 +1,312 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Copyright (c) 2017, Impinj, Inc. + */ + +#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> + +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 int imx7_reset_free(struct reset_ctl *rst) +{ + return 0; +} + +static int imx7_reset_request(struct reset_ctl *rst) +{ + return 0; +} + +static const struct reset_ops imx7_reset_reset_ops = { + .request = imx7_reset_request, + .free = imx7_reset_free, + .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_alloc_size = sizeof(struct imx7_reset_priv), +}; |