This is the initial commit for UniPhier reset controller driver. Most code was ported from Linux.
Signed-off-by: Masahiro Yamada yamada.masahiro@socionext.com ---
arch/arm/Kconfig | 1 + drivers/reset/Kconfig | 9 + drivers/reset/Makefile | 1 + drivers/reset/reset-uniphier.c | 376 +++++++++++++++++++++++++++++++++++++++++ 4 files changed, 387 insertions(+) create mode 100644 drivers/reset/reset-uniphier.c
diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig index f55d5b2..861b86e 100644 --- a/arch/arm/Kconfig +++ b/arch/arm/Kconfig @@ -813,6 +813,7 @@ config ARCH_UNIPHIER select DM_GPIO select DM_I2C select DM_MMC + select DM_RESET select DM_SERIAL select DM_USB select OF_CONTROL diff --git a/drivers/reset/Kconfig b/drivers/reset/Kconfig index 4fcc0d9..c42b0bc 100644 --- a/drivers/reset/Kconfig +++ b/drivers/reset/Kconfig @@ -34,4 +34,13 @@ config TEGRA186_RESET Enable support for manipulating Tegra's on-SoC reset signals via IPC requests to the BPMP (Boot and Power Management Processor).
+config RESET_UNIPHIER + bool "Reset controller driver for UniPhier SoCs" + depends on ARCH_UNIPHIER + default y + help + Support for reset controllers on UniPhier SoCs. + Say Y if you want to control reset signals provided by System Control + block, Media I/O block, Peripheral Block. + endmenu diff --git a/drivers/reset/Makefile b/drivers/reset/Makefile index 5d4ea3d..5c4305c 100644 --- a/drivers/reset/Makefile +++ b/drivers/reset/Makefile @@ -7,3 +7,4 @@ obj-$(CONFIG_SANDBOX_MBOX) += sandbox-reset.o obj-$(CONFIG_SANDBOX_MBOX) += sandbox-reset-test.o obj-$(CONFIG_TEGRA_CAR_RESET) += tegra-car-reset.o obj-$(CONFIG_TEGRA186_RESET) += tegra186-reset.o +obj-$(CONFIG_RESET_UNIPHIER) += reset-uniphier.o diff --git a/drivers/reset/reset-uniphier.c b/drivers/reset/reset-uniphier.c new file mode 100644 index 0000000..29c4d4d --- /dev/null +++ b/drivers/reset/reset-uniphier.c @@ -0,0 +1,376 @@ +/* + * Copyright (C) 2016 Socionext Inc. + * Author: Masahiro Yamada yamada.masahiro@socionext.com + * + * SPDX-License-Identifier: GPL-2.0+ + */ + +#include <common.h> +#include <reset-uclass.h> +#include <dm/device.h> +#include <linux/bitops.h> +#include <linux/io.h> +#include <linux/sizes.h> + +struct uniphier_reset_data { + unsigned int id; + unsigned int reg; + unsigned int bit; + unsigned int flags; +#define UNIPHIER_RESET_ACTIVE_LOW BIT(0) +}; + +#define UNIPHIER_RESET_ID_END (unsigned int)(-1) + +#define UNIPHIER_RESET_END \ + { .id = UNIPHIER_RESET_ID_END } + +#define UNIPHIER_RESET(_id, _reg, _bit) \ + { \ + .id = (_id), \ + .reg = (_reg), \ + .bit = (_bit), \ + } + +#define UNIPHIER_RESETX(_id, _reg, _bit) \ + { \ + .id = (_id), \ + .reg = (_reg), \ + .bit = (_bit), \ + .flags = UNIPHIER_RESET_ACTIVE_LOW, \ + } + +/* System reset data */ +#define UNIPHIER_SLD3_SYS_RESET_STDMAC(id) \ + UNIPHIER_RESETX((id), 0x2000, 10) + +#define UNIPHIER_LD11_SYS_RESET_STDMAC(id) \ + UNIPHIER_RESETX((id), 0x200c, 8) + +#define UNIPHIER_PRO4_SYS_RESET_GIO(id) \ + UNIPHIER_RESETX((id), 0x2000, 6) + +#define UNIPHIER_LD20_SYS_RESET_GIO(id) \ + UNIPHIER_RESETX((id), 0x200c, 5) + +#define UNIPHIER_PRO4_SYS_RESET_USB3(id, ch) \ + UNIPHIER_RESETX((id), 0x2000 + 0x4 * (ch), 17) + +const struct uniphier_reset_data uniphier_sld3_sys_reset_data[] = { + UNIPHIER_SLD3_SYS_RESET_STDMAC(8), /* Ether, HSC, MIO */ + UNIPHIER_RESET_END, +}; + +const struct uniphier_reset_data uniphier_pro4_sys_reset_data[] = { + UNIPHIER_SLD3_SYS_RESET_STDMAC(8), /* HSC, MIO, RLE */ + UNIPHIER_PRO4_SYS_RESET_GIO(12), /* Ether, SATA, USB3 */ + UNIPHIER_PRO4_SYS_RESET_USB3(14, 0), + UNIPHIER_PRO4_SYS_RESET_USB3(15, 1), + UNIPHIER_RESET_END, +}; + +const struct uniphier_reset_data uniphier_pro5_sys_reset_data[] = { + UNIPHIER_SLD3_SYS_RESET_STDMAC(8), /* HSC */ + UNIPHIER_PRO4_SYS_RESET_GIO(12), /* PCIe, USB3 */ + UNIPHIER_PRO4_SYS_RESET_USB3(14, 0), + UNIPHIER_PRO4_SYS_RESET_USB3(15, 1), + UNIPHIER_RESET_END, +}; + +const struct uniphier_reset_data uniphier_pxs2_sys_reset_data[] = { + UNIPHIER_SLD3_SYS_RESET_STDMAC(8), /* HSC, RLE */ + UNIPHIER_PRO4_SYS_RESET_USB3(14, 0), + UNIPHIER_PRO4_SYS_RESET_USB3(15, 1), + UNIPHIER_RESETX(16, 0x2014, 4), /* USB30-PHY0 */ + UNIPHIER_RESETX(17, 0x2014, 0), /* USB30-PHY1 */ + UNIPHIER_RESETX(18, 0x2014, 2), /* USB30-PHY2 */ + UNIPHIER_RESETX(20, 0x2014, 5), /* USB31-PHY0 */ + UNIPHIER_RESETX(21, 0x2014, 1), /* USB31-PHY1 */ + UNIPHIER_RESETX(28, 0x2014, 12), /* SATA */ + UNIPHIER_RESET(29, 0x2014, 8), /* SATA-PHY (active high) */ + UNIPHIER_RESET_END, +}; + +const struct uniphier_reset_data uniphier_ld11_sys_reset_data[] = { + UNIPHIER_LD11_SYS_RESET_STDMAC(8), /* HSC, MIO */ + UNIPHIER_RESET_END, +}; + +const struct uniphier_reset_data uniphier_ld20_sys_reset_data[] = { + UNIPHIER_LD11_SYS_RESET_STDMAC(8), /* HSC */ + UNIPHIER_LD20_SYS_RESET_GIO(12), /* PCIe, USB3 */ + UNIPHIER_RESETX(16, 0x200c, 12), /* USB30-PHY0 */ + UNIPHIER_RESETX(17, 0x200c, 13), /* USB30-PHY1 */ + UNIPHIER_RESETX(18, 0x200c, 14), /* USB30-PHY2 */ + UNIPHIER_RESETX(19, 0x200c, 15), /* USB30-PHY3 */ + UNIPHIER_RESET_END, +}; + +/* Media I/O reset data */ +#define UNIPHIER_MIO_RESET_SD(id, ch) \ + UNIPHIER_RESETX((id), 0x110 + 0x200 * (ch), 0) + +#define UNIPHIER_MIO_RESET_SD_BRIDGE(id, ch) \ + UNIPHIER_RESETX((id), 0x110 + 0x200 * (ch), 26) + +#define UNIPHIER_MIO_RESET_EMMC_HW_RESET(id, ch) \ + UNIPHIER_RESETX((id), 0x80 + 0x200 * (ch), 0) + +#define UNIPHIER_MIO_RESET_USB2(id, ch) \ + UNIPHIER_RESETX((id), 0x114 + 0x200 * (ch), 0) + +#define UNIPHIER_MIO_RESET_USB2_BRIDGE(id, ch) \ + UNIPHIER_RESETX((id), 0x110 + 0x200 * (ch), 24) + +#define UNIPHIER_MIO_RESET_DMAC(id) \ + UNIPHIER_RESETX((id), 0x110, 17) + +const struct uniphier_reset_data uniphier_mio_reset_data[] = { + UNIPHIER_MIO_RESET_SD(0, 0), + UNIPHIER_MIO_RESET_SD(1, 1), + UNIPHIER_MIO_RESET_SD(2, 2), + UNIPHIER_MIO_RESET_SD_BRIDGE(3, 0), + UNIPHIER_MIO_RESET_SD_BRIDGE(4, 1), + UNIPHIER_MIO_RESET_SD_BRIDGE(5, 2), + UNIPHIER_MIO_RESET_EMMC_HW_RESET(6, 1), + UNIPHIER_MIO_RESET_DMAC(7), + UNIPHIER_MIO_RESET_USB2(8, 0), + UNIPHIER_MIO_RESET_USB2(9, 1), + UNIPHIER_MIO_RESET_USB2(10, 2), + UNIPHIER_MIO_RESET_USB2(11, 3), + UNIPHIER_MIO_RESET_USB2_BRIDGE(12, 0), + UNIPHIER_MIO_RESET_USB2_BRIDGE(13, 1), + UNIPHIER_MIO_RESET_USB2_BRIDGE(14, 2), + UNIPHIER_MIO_RESET_USB2_BRIDGE(15, 3), + UNIPHIER_RESET_END, +}; + +/* Peripheral reset data */ +#define UNIPHIER_PERI_RESET_UART(id, ch) \ + UNIPHIER_RESETX((id), 0x114, 19 + (ch)) + +#define UNIPHIER_PERI_RESET_I2C(id, ch) \ + UNIPHIER_RESETX((id), 0x114, 5 + (ch)) + +#define UNIPHIER_PERI_RESET_FI2C(id, ch) \ + UNIPHIER_RESETX((id), 0x114, 24 + (ch)) + +const struct uniphier_reset_data uniphier_ld4_peri_reset_data[] = { + UNIPHIER_PERI_RESET_UART(0, 0), + UNIPHIER_PERI_RESET_UART(1, 1), + UNIPHIER_PERI_RESET_UART(2, 2), + UNIPHIER_PERI_RESET_UART(3, 3), + UNIPHIER_PERI_RESET_I2C(4, 0), + UNIPHIER_PERI_RESET_I2C(5, 1), + UNIPHIER_PERI_RESET_I2C(6, 2), + UNIPHIER_PERI_RESET_I2C(7, 3), + UNIPHIER_PERI_RESET_I2C(8, 4), + UNIPHIER_RESET_END, +}; + +const struct uniphier_reset_data uniphier_pro4_peri_reset_data[] = { + UNIPHIER_PERI_RESET_UART(0, 0), + UNIPHIER_PERI_RESET_UART(1, 1), + UNIPHIER_PERI_RESET_UART(2, 2), + UNIPHIER_PERI_RESET_UART(3, 3), + UNIPHIER_PERI_RESET_FI2C(4, 0), + UNIPHIER_PERI_RESET_FI2C(5, 1), + UNIPHIER_PERI_RESET_FI2C(6, 2), + UNIPHIER_PERI_RESET_FI2C(7, 3), + UNIPHIER_PERI_RESET_FI2C(8, 4), + UNIPHIER_PERI_RESET_FI2C(9, 5), + UNIPHIER_PERI_RESET_FI2C(10, 6), + UNIPHIER_RESET_END, +}; + +/* core implementaton */ +struct uniphier_reset_priv { + void __iomem *base; + const struct uniphier_reset_data *data; +}; + +static int uniphier_reset_request(struct reset_ctl *reset_ctl) +{ + return 0; +} + +static int uniphier_reset_free(struct reset_ctl *reset_ctl) +{ + return 0; +} + +static int uniphier_reset_update(struct reset_ctl *reset_ctl, int assert) +{ + struct uniphier_reset_priv *priv = dev_get_priv(reset_ctl->dev); + unsigned long id = reset_ctl->id; + const struct uniphier_reset_data *p; + + for (p = priv->data; p->id != UNIPHIER_RESET_ID_END; p++) { + u32 mask, val; + + if (p->id != id) + continue; + + val = readl(priv->base + p->reg); + + if (p->flags & UNIPHIER_RESET_ACTIVE_LOW) + assert = !assert; + + mask = BIT(p->bit); + + if (assert) + val |= mask; + else + val &= ~mask; + + writel(val, priv->base + p->reg); + + return 0; + } + + dev_err(priv->dev, "reset_id=%lu was not handled\n", id); + return -EINVAL; +} + +static int uniphier_reset_assert(struct reset_ctl *reset_ctl) +{ + return uniphier_reset_update(reset_ctl, 1); +} + +static int uniphier_reset_deassert(struct reset_ctl *reset_ctl) +{ + return uniphier_reset_update(reset_ctl, 0); +} + +static const struct reset_ops uniphier_reset_ops = { + .request = uniphier_reset_request, + .free = uniphier_reset_free, + .rst_assert = uniphier_reset_assert, + .rst_deassert = uniphier_reset_deassert, +}; + +static int uniphier_reset_probe(struct udevice *dev) +{ + struct uniphier_reset_priv *priv = dev_get_priv(dev); + fdt_addr_t addr; + + addr = dev_get_addr(dev->parent); + if (addr == FDT_ADDR_T_NONE) + return -EINVAL; + + priv->base = devm_ioremap(dev, addr, SZ_4K); + if (!priv->base) + return -ENOMEM; + + priv->data = (void *)dev_get_driver_data(dev); + + return 0; +} + +static const struct udevice_id uniphier_reset_match[] = { + /* System reset */ + { + .compatible = "socionext,uniphier-sld3-reset", + .data = (ulong)uniphier_sld3_sys_reset_data, + }, + { + .compatible = "socionext,uniphier-ld4-reset", + .data = (ulong)uniphier_sld3_sys_reset_data, + }, + { + .compatible = "socionext,uniphier-pro4-reset", + .data = (ulong)uniphier_pro4_sys_reset_data, + }, + { + .compatible = "socionext,uniphier-sld8-reset", + .data = (ulong)uniphier_sld3_sys_reset_data, + }, + { + .compatible = "socionext,uniphier-pro5-reset", + .data = (ulong)uniphier_pro5_sys_reset_data, + }, + { + .compatible = "socionext,uniphier-pxs2-reset", + .data = (ulong)uniphier_pxs2_sys_reset_data, + }, + { + .compatible = "socionext,uniphier-ld11-reset", + .data = (ulong)uniphier_ld11_sys_reset_data, + }, + { + .compatible = "socionext,uniphier-ld20-reset", + .data = (ulong)uniphier_ld20_sys_reset_data, + }, + /* Media I/O reset */ + { + .compatible = "socionext,uniphier-sld3-mio-clock", + .data = (ulong)uniphier_mio_reset_data, + }, + { + .compatible = "socionext,uniphier-ld4-mio-reset", + .data = (ulong)uniphier_mio_reset_data, + }, + { + .compatible = "socionext,uniphier-pro4-mio-reset", + .data = (ulong)uniphier_mio_reset_data, + }, + { + .compatible = "socionext,uniphier-sld8-mio-reset", + .data = (ulong)uniphier_mio_reset_data, + }, + { + .compatible = "socionext,uniphier-pro5-mio-reset", + .data = (ulong)uniphier_mio_reset_data, + }, + { + .compatible = "socionext,uniphier-pxs2-mio-reset", + .data = (ulong)uniphier_mio_reset_data, + }, + { + .compatible = "socionext,uniphier-ld11-mio-reset", + .data = (ulong)uniphier_mio_reset_data, + }, + { + .compatible = "socionext,uniphier-ld20-mio-reset", + .data = (ulong)uniphier_mio_reset_data, + }, + /* Peripheral reset */ + { + .compatible = "socionext,uniphier-ld4-peri-reset", + .data = (ulong)uniphier_ld4_peri_reset_data, + }, + { + .compatible = "socionext,uniphier-pro4-peri-reset", + .data = (ulong)uniphier_pro4_peri_reset_data, + }, + { + .compatible = "socionext,uniphier-sld8-peri-reset", + .data = (ulong)uniphier_ld4_peri_reset_data, + }, + { + .compatible = "socionext,uniphier-pro5-peri-reset", + .data = (ulong)uniphier_pro4_peri_reset_data, + }, + { + .compatible = "socionext,uniphier-pxs2-peri-reset", + .data = (ulong)uniphier_pro4_peri_reset_data, + }, + { + .compatible = "socionext,uniphier-ld11-peri-reset", + .data = (ulong)uniphier_pro4_peri_reset_data, + }, + { + .compatible = "socionext,uniphier-ld20-peri-reset", + .data = (ulong)uniphier_pro4_peri_reset_data, + }, + { /* sentinel */ } +}; + +U_BOOT_DRIVER(uniphier_reset) = { + .name = "uniphier-reset", + .id = UCLASS_RESET, + .of_match = uniphier_reset_match, + .probe = uniphier_reset_probe, + .priv_auto_alloc_size = sizeof(struct uniphier_reset_priv), + .ops = &uniphier_reset_ops, +};