reset: Add IPQ40xx reset controller driver

On Qualcomm IPQ40xx SoC series, GCC clock IP also handles the resets.
So since this will be needed by further drivers, lets add a driver for the reset controller.

Signed-off-by: Robert Marko <robert.marko@sartura.hr>
Cc: Luka Perkov <luka.perkov@sartura.hr>

3 files changed, 182 insertions, 0 deletions

diff --git a/drivers/reset/Kconfig b/drivers/reset/Kconfig
index 253902ff57..3fdfe4a6cb 100644
--- a/drivers/reset/Kconfig
+++ b/drivers/reset/Kconfig
@@ -148,6 +148,14 @@ config RESET_IMX7
 	help
 	  Support for reset controller on i.MX7/8 SoCs.
 
+config RESET_IPQ419
+	bool "Reset driver for Qualcomm IPQ40xx SoCs"
+	depends on DM_RESET && ARCH_IPQ40XX
+	default y
+	help
+	  Support for reset controller on Qualcomm
+	  IPQ40xx SoCs.
+
 config RESET_SIFIVE
 	bool "Reset Driver for SiFive SoC's"
 	depends on DM_RESET && CLK_SIFIVE_FU540_PRCI && TARGET_SIFIVE_FU540
diff --git a/drivers/reset/Makefile b/drivers/reset/Makefile
index 3c7f066ae3..5176da5885 100644
--- a/drivers/reset/Makefile
+++ b/drivers/reset/Makefile
@@ -23,6 +23,7 @@ obj-$(CONFIG_RESET_MTMIPS) += reset-mtmips.o
 obj-$(CONFIG_RESET_SUNXI) += reset-sunxi.o
 obj-$(CONFIG_RESET_HISILICON) += reset-hisilicon.o
 obj-$(CONFIG_RESET_IMX7) += reset-imx7.o
+obj-$(CONFIG_RESET_IPQ419) += reset-ipq4019.o
 obj-$(CONFIG_RESET_SIFIVE) += reset-sifive.o
 obj-$(CONFIG_RESET_SYSCON) += reset-syscon.o
 obj-$(CONFIG_RESET_RASPBERRYPI) += reset-raspberrypi.o
diff --git a/drivers/reset/reset-ipq4019.c b/drivers/reset/reset-ipq4019.c
new file mode 100644
index 0000000000..f216db4ce5
--- /dev/null
+++ b/drivers/reset/reset-ipq4019.c
@@ -0,0 +1,173 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (c) 2020 Sartura Ltd.
+ *
+ * Author: Robert Marko <robert.marko@sartura.hr>
+ *
+ * Based on Linux driver
+ */
+
+#include <asm/io.h>
+#include <common.h>
+#include <dm.h>
+#include <dt-bindings/reset/qcom,ipq4019-reset.h>
+#include <reset-uclass.h>
+#include <linux/bitops.h>
+#include <malloc.h>
+
+struct ipq4019_reset_priv {
+	phys_addr_t base;
+};
+
+struct qcom_reset_map {
+	unsigned int reg;
+	u8 bit;
+};
+
+static const struct qcom_reset_map gcc_ipq4019_resets[] = {
+	[WIFI0_CPU_INIT_RESET] = { 0x1f008, 5 },
+	[WIFI0_RADIO_SRIF_RESET] = { 0x1f008, 4 },
+	[WIFI0_RADIO_WARM_RESET] = { 0x1f008, 3 },
+	[WIFI0_RADIO_COLD_RESET] = { 0x1f008, 2 },
+	[WIFI0_CORE_WARM_RESET] = { 0x1f008, 1 },
+	[WIFI0_CORE_COLD_RESET] = { 0x1f008, 0 },
+	[WIFI1_CPU_INIT_RESET] = { 0x20008, 5 },
+	[WIFI1_RADIO_SRIF_RESET] = { 0x20008, 4 },
+	[WIFI1_RADIO_WARM_RESET] = { 0x20008, 3 },
+	[WIFI1_RADIO_COLD_RESET] = { 0x20008, 2 },
+	[WIFI1_CORE_WARM_RESET] = { 0x20008, 1 },
+	[WIFI1_CORE_COLD_RESET] = { 0x20008, 0 },
+	[USB3_UNIPHY_PHY_ARES] = { 0x1e038, 5 },
+	[USB3_HSPHY_POR_ARES] = { 0x1e038, 4 },
+	[USB3_HSPHY_S_ARES] = { 0x1e038, 2 },
+	[USB2_HSPHY_POR_ARES] = { 0x1e01c, 4 },
+	[USB2_HSPHY_S_ARES] = { 0x1e01c, 2 },
+	[PCIE_PHY_AHB_ARES] = { 0x1d010, 11 },
+	[PCIE_AHB_ARES] = { 0x1d010, 10 },
+	[PCIE_PWR_ARES] = { 0x1d010, 9 },
+	[PCIE_PIPE_STICKY_ARES] = { 0x1d010, 8 },
+	[PCIE_AXI_M_STICKY_ARES] = { 0x1d010, 7 },
+	[PCIE_PHY_ARES] = { 0x1d010, 6 },
+	[PCIE_PARF_XPU_ARES] = { 0x1d010, 5 },
+	[PCIE_AXI_S_XPU_ARES] = { 0x1d010, 4 },
+	[PCIE_AXI_M_VMIDMT_ARES] = { 0x1d010, 3 },
+	[PCIE_PIPE_ARES] = { 0x1d010, 2 },
+	[PCIE_AXI_S_ARES] = { 0x1d010, 1 },
+	[PCIE_AXI_M_ARES] = { 0x1d010, 0 },
+	[ESS_RESET] = { 0x12008, 0},
+	[GCC_BLSP1_BCR] = {0x01000, 0},
+	[GCC_BLSP1_QUP1_BCR] = {0x02000, 0},
+	[GCC_BLSP1_UART1_BCR] = {0x02038, 0},
+	[GCC_BLSP1_QUP2_BCR] = {0x03008, 0},
+	[GCC_BLSP1_UART2_BCR] = {0x03028, 0},
+	[GCC_BIMC_BCR] = {0x04000, 0},
+	[GCC_TLMM_BCR] = {0x05000, 0},
+	[GCC_IMEM_BCR] = {0x0E000, 0},
+	[GCC_ESS_BCR] = {0x12008, 0},
+	[GCC_PRNG_BCR] = {0x13000, 0},
+	[GCC_BOOT_ROM_BCR] = {0x13008, 0},
+	[GCC_CRYPTO_BCR] = {0x16000, 0},
+	[GCC_SDCC1_BCR] = {0x18000, 0},
+	[GCC_SEC_CTRL_BCR] = {0x1A000, 0},
+	[GCC_AUDIO_BCR] = {0x1B008, 0},
+	[GCC_QPIC_BCR] = {0x1C000, 0},
+	[GCC_PCIE_BCR] = {0x1D000, 0},
+	[GCC_USB2_BCR] = {0x1E008, 0},
+	[GCC_USB2_PHY_BCR] = {0x1E018, 0},
+	[GCC_USB3_BCR] = {0x1E024, 0},
+	[GCC_USB3_PHY_BCR] = {0x1E034, 0},
+	[GCC_SYSTEM_NOC_BCR] = {0x21000, 0},
+	[GCC_PCNOC_BCR] = {0x2102C, 0},
+	[GCC_DCD_BCR] = {0x21038, 0},
+	[GCC_SNOC_BUS_TIMEOUT0_BCR] = {0x21064, 0},
+	[GCC_SNOC_BUS_TIMEOUT1_BCR] = {0x2106C, 0},
+	[GCC_SNOC_BUS_TIMEOUT2_BCR] = {0x21074, 0},
+	[GCC_SNOC_BUS_TIMEOUT3_BCR] = {0x2107C, 0},
+	[GCC_PCNOC_BUS_TIMEOUT0_BCR] = {0x21084, 0},
+	[GCC_PCNOC_BUS_TIMEOUT1_BCR] = {0x2108C, 0},
+	[GCC_PCNOC_BUS_TIMEOUT2_BCR] = {0x21094, 0},
+	[GCC_PCNOC_BUS_TIMEOUT3_BCR] = {0x2109C, 0},
+	[GCC_PCNOC_BUS_TIMEOUT4_BCR] = {0x210A4, 0},
+	[GCC_PCNOC_BUS_TIMEOUT5_BCR] = {0x210AC, 0},
+	[GCC_PCNOC_BUS_TIMEOUT6_BCR] = {0x210B4, 0},
+	[GCC_PCNOC_BUS_TIMEOUT7_BCR] = {0x210BC, 0},
+	[GCC_PCNOC_BUS_TIMEOUT8_BCR] = {0x210C4, 0},
+	[GCC_PCNOC_BUS_TIMEOUT9_BCR] = {0x210CC, 0},
+	[GCC_TCSR_BCR] = {0x22000, 0},
+	[GCC_MPM_BCR] = {0x24000, 0},
+	[GCC_SPDM_BCR] = {0x25000, 0},
+};
+
+static int ipq4019_reset_assert(struct reset_ctl *rst)
+{
+	struct ipq4019_reset_priv *priv = dev_get_priv(rst->dev);
+	const struct qcom_reset_map *reset_map = gcc_ipq4019_resets;
+	const struct qcom_reset_map *map;
+	u32 value;
+
+	map = &reset_map[rst->id];
+
+	value = readl(priv->base + map->reg);
+	value |= BIT(map->bit);
+	writel(value, priv->base + map->reg);
+
+	return 0;
+}
+
+static int ipq4019_reset_deassert(struct reset_ctl *rst)
+{
+	struct ipq4019_reset_priv *priv = dev_get_priv(rst->dev);
+	const struct qcom_reset_map *reset_map = gcc_ipq4019_resets;
+	const struct qcom_reset_map *map;
+	u32 value;
+
+	map = &reset_map[rst->id];
+
+	value = readl(priv->base + map->reg);
+	value &= ~BIT(map->bit);
+	writel(value, priv->base + map->reg);
+
+	return 0;
+}
+
+static int ipq4019_reset_free(struct reset_ctl *rst)
+{
+	return 0;
+}
+
+static int ipq4019_reset_request(struct reset_ctl *rst)
+{
+	return 0;
+}
+
+static const struct reset_ops ipq4019_reset_ops = {
+	.request = ipq4019_reset_request,
+	.rfree = ipq4019_reset_free,
+	.rst_assert = ipq4019_reset_assert,
+	.rst_deassert = ipq4019_reset_deassert,
+};
+
+static const struct udevice_id ipq4019_reset_ids[] = {
+	{ .compatible = "qcom,gcc-reset-ipq4019" },
+	{ }
+};
+
+static int ipq4019_reset_probe(struct udevice *dev)
+{
+	struct ipq4019_reset_priv *priv = dev_get_priv(dev);
+
+	priv->base = dev_read_addr(dev);
+	if (priv->base == FDT_ADDR_T_NONE)
+		return -EINVAL;
+
+	return 0;
+}
+
+U_BOOT_DRIVER(ipq4019_reset) = {
+	.name = "ipq4019_reset",
+	.id = UCLASS_RESET,
+	.of_match = ipq4019_reset_ids,
+	.ops = &ipq4019_reset_ops,
+	.probe = ipq4019_reset_probe,
+	.priv_auto_alloc_size = sizeof(struct ipq4019_reset_priv),
+};