[U-Boot] [PATCH 9/9] reset: uniphier: add reset controller driver for UniPhier SoCs
Masahiro Yamada
yamada.masahiro at socionext.com
Sat Oct 8 06:25:31 CEST 2016
This is the initial commit for UniPhier reset controller driver.
Most code was ported from Linux.
Signed-off-by: Masahiro Yamada <yamada.masahiro at 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 at 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,
+};
--
1.9.1
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