From: Yoshinori Sato <ysato@users.sourceforge.jp>
To: linux-sh@vger.kernel.org
Cc: "Yoshinori Sato" <ysato@users.sourceforge.jp>,
"Damien Le Moal" <dlemoal@kernel.org>,
"Niklas Cassel" <cassel@kernel.org>,
"Rob Herring" <robh@kernel.org>,
"Krzysztof Kozlowski" <krzysztof.kozlowski+dt@linaro.org>,
"Conor Dooley" <conor+dt@kernel.org>,
"Geert Uytterhoeven" <geert+renesas@glider.be>,
"Michael Turquette" <mturquette@baylibre.com>,
"Stephen Boyd" <sboyd@kernel.org>,
"David Airlie" <airlied@gmail.com>,
"Daniel Vetter" <daniel@ffwll.ch>,
"Maarten Lankhorst" <maarten.lankhorst@linux.intel.com>,
"Maxime Ripard" <mripard@kernel.org>,
"Thomas Zimmermann" <tzimmermann@suse.de>,
"Thomas Gleixner" <tglx@linutronix.de>,
"Bjorn Helgaas" <bhelgaas@google.com>,
"Lorenzo Pieralisi" <lpieralisi@kernel.org>,
"Krzysztof Wilczyński" <kw@linux.com>,
"Greg Kroah-Hartman" <gregkh@linuxfoundation.org>,
"Jiri Slaby" <jirislaby@kernel.org>,
"Magnus Damm" <magnus.damm@gmail.com>,
"Daniel Lezcano" <daniel.lezcano@linaro.org>,
"Rich Felker" <dalias@libc.org>,
"John Paul Adrian Glaubitz" <glaubitz@physik.fu-berlin.de>,
"Lee Jones" <lee@kernel.org>, "Helge Deller" <deller@gmx.de>,
"Heiko Stuebner" <heiko.stuebner@cherry.de>,
"Shawn Guo" <shawnguo@kernel.org>,
"Sebastian Reichel" <sre@kernel.org>,
"Chris Morgan" <macromorgan@hotmail.com>,
"Linus Walleij" <linus.walleij@linaro.org>,
"Arnd Bergmann" <arnd@arndb.de>,
"David Rientjes" <rientjes@google.com>,
"Hyeonggon Yoo" <42.hyeyoo@gmail.com>,
"Vlastimil Babka" <vbabka@suse.cz>, "Baoquan He" <bhe@redhat.com>,
"Andrew Morton" <akpm@linux-foundation.org>,
"Guenter Roeck" <linux@roeck-us.net>,
"Kefeng Wang" <wangkefeng.wang@huawei.com>,
"Stephen Rothwell" <sfr@canb.auug.org.au>,
"Javier Martinez Canillas" <javierm@redhat.com>,
"Guo Ren" <guoren@kernel.org>,
"Azeem Shaikh" <azeemshaikh38@gmail.com>,
"Max Filippov" <jcmvbkbc@gmail.com>,
"Jonathan Corbet" <corbet@lwn.net>,
"Jacky Huang" <ychuang3@nuvoton.com>,
"Herve Codina" <herve.codina@bootlin.com>,
"Manikanta Guntupalli" <manikanta.guntupalli@amd.com>,
"Anup Patel" <apatel@ventanamicro.com>,
"Biju Das" <biju.das.jz@bp.renesas.com>,
"Uwe Kleine-König" <u.kleine-koenig@pengutronix.de>,
"Sam Ravnborg" <sam@ravnborg.org>,
"Sergey Shtylyov" <s.shtylyov@omp.ru>,
"Laurent Pinchart" <laurent.pinchart+renesas@ideasonboard.com>,
linux-ide@vger.kernel.org, devicetree@vger.kernel.org,
linux-kernel@vger.kernel.org, linux-renesas-soc@vger.kernel.org,
linux-clk@vger.kernel.org, dri-devel@lists.freedesktop.org,
linux-pci@vger.kernel.org, linux-serial@vger.kernel.org,
linux-fbdev@vger.kernel.org
Subject: [PATCH v7 16/37] irqchip: Add SH7751 INTC driver
Date: Thu, 4 Apr 2024 13:59:49 +0900 [thread overview]
Message-ID: <82bf86c5804460fd61eb6725c6222ad1cbd7d846.1712205900.git.ysato@users.sourceforge.jp> (raw)
In-Reply-To: <cover.1712205900.git.ysato@users.sourceforge.jp>
Renesas SH7751 Internal interrupt controller driver.
Signed-off-by: Yoshinori Sato <ysato@users.sourceforge.jp>
---
drivers/irqchip/Kconfig | 8 +
drivers/irqchip/Makefile | 1 +
drivers/irqchip/irq-renesas-sh7751.c | 282 +++++++++++++++++++++++++++
3 files changed, 291 insertions(+)
create mode 100644 drivers/irqchip/irq-renesas-sh7751.c
diff --git a/drivers/irqchip/Kconfig b/drivers/irqchip/Kconfig
index 72c07a12f5e1..33badb5b4f00 100644
--- a/drivers/irqchip/Kconfig
+++ b/drivers/irqchip/Kconfig
@@ -690,4 +690,12 @@ config SUNPLUS_SP7021_INTC
chained controller, routing all interrupt source in P-Chip to
the primary controller on C-Chip.
+config RENESAS_SH7751_INTC
+ bool "Renesas SH7751 Interrupt Controller"
+ depends on SH_DEVICE_TREE || COMPILE_TEST
+ select IRQ_DOMAIN_HIERARCHY
+ help
+ Support for the Renesas SH7751 On-chip interrupt controller.
+ And external interrupt encoder for some targets.
+
endmenu
diff --git a/drivers/irqchip/Makefile b/drivers/irqchip/Makefile
index ec4a18380998..51855034a895 100644
--- a/drivers/irqchip/Makefile
+++ b/drivers/irqchip/Makefile
@@ -121,3 +121,4 @@ obj-$(CONFIG_IRQ_IDT3243X) += irq-idt3243x.o
obj-$(CONFIG_APPLE_AIC) += irq-apple-aic.o
obj-$(CONFIG_MCHP_EIC) += irq-mchp-eic.o
obj-$(CONFIG_SUNPLUS_SP7021_INTC) += irq-sp7021-intc.o
+obj-$(CONFIG_RENESAS_SH7751_INTC) += irq-renesas-sh7751.o
diff --git a/drivers/irqchip/irq-renesas-sh7751.c b/drivers/irqchip/irq-renesas-sh7751.c
new file mode 100644
index 000000000000..91d6dc3ed04c
--- /dev/null
+++ b/drivers/irqchip/irq-renesas-sh7751.c
@@ -0,0 +1,282 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Renesas SH7751 interrupt controller driver
+ *
+ * Copyright 2023 Yoshinori Sato <ysato@users.sourceforge.jp>
+ */
+
+#include <linux/irq.h>
+#include <linux/irqchip.h>
+#include <linux/of_address.h>
+#include <linux/of_irq.h>
+#include <linux/of.h>
+#include <linux/io.h>
+#include <dt-bindings/interrupt-controller/renesas,sh7751-intc.h>
+
+struct ipr {
+ u16 off;
+ u16 idx;
+};
+
+struct sh7751_intc_priv {
+ const struct ipr *iprmap;
+ void __iomem *base;
+ void __iomem *intpri00;
+ bool irlm;
+};
+
+enum {
+ R_ICR = 0x00,
+ R_IPR = 0x04,
+ R_INTPRI00 = 0x00,
+ R_INTREQ00 = 0x20,
+ R_INTMSK00 = 0x40,
+ R_INTMSKCLR00 = 0x60,
+};
+
+#define ICR_IRLM BIT(7)
+
+/*
+ * SH7751 IRQ mapping
+ * IRQ16 - 63: Group0 - IPRA to IPRD
+ * IRQ16 - 31: external IRL input (ICR.IRLM is 0)
+ * IRQ80 - 92: Group1 - INTPRI00
+ */
+#define IRQ_START 16
+#define MAX_IRL (IRQ_START + NR_IRL)
+#define GRP0_IRQ_END 63
+#define GRP1_IRQ_START 80
+#define IRQ_END 92
+
+#define NR_IPRMAP0 (GRP0_IRQ_END - IRQ_START + 1)
+#define NR_IPRMAP1 (IRQ_END - GRP1_IRQ_START)
+#define IPR_PRI_MASK 0x000f
+
+#define IPRA 0
+#define IPRB 4
+#define IPRC 8
+#define IPRD 12
+#define INTPRI00 256
+#define IPR_B12 12
+#define IPR_B8 8
+#define IPR_B4 4
+#define IPR_B0 0
+
+/* SH7751 EVT to IPR mapping table */
+static const struct ipr sh7751_iprmap[] = {
+ [evt2irq(0x240)] = {IPRD, IPR_B12}, /* IRL0 (ICR.IRLM=1) */
+ [evt2irq(0x2a0)] = {IPRD, IPR_B8}, /* IRL1 (ICR.IRLM=1) */
+ [evt2irq(0x300)] = {IPRD, IPR_B4}, /* IRL2 (ICR.IRLM=1) */
+ [evt2irq(0x360)] = {IPRD, IPR_B0}, /* IRL3 (ICR.IRLM=1) */
+ [evt2irq(0x400)] = {IPRA, IPR_B12}, /* TMU0 */
+ [evt2irq(0x420)] = {IPRA, IPR_B8}, /* TMU1 */
+ [evt2irq(0x440)] = {IPRA, IPR_B4}, /* TMU2 TNUI */
+ [evt2irq(0x460)] = {IPRA, IPR_B4}, /* TMU2 TICPI */
+ [evt2irq(0x480)] = {IPRA, IPR_B0}, /* RTC ATI */
+ [evt2irq(0x4a0)] = {IPRA, IPR_B0}, /* RTC PRI */
+ [evt2irq(0x4c0)] = {IPRA, IPR_B0}, /* RTC CUI */
+ [evt2irq(0x4e0)] = {IPRB, IPR_B4}, /* SCI ERI */
+ [evt2irq(0x500)] = {IPRB, IPR_B4}, /* SCI RXI */
+ [evt2irq(0x520)] = {IPRB, IPR_B4}, /* SCI TXI */
+ [evt2irq(0x540)] = {IPRB, IPR_B4}, /* SCI TEI */
+ [evt2irq(0x560)] = {IPRB, IPR_B12}, /* WDT */
+ [evt2irq(0x580)] = {IPRB, IPR_B8}, /* REF RCMI */
+ [evt2irq(0x5a0)] = {IPRB, IPR_B4}, /* REF ROVI */
+ [evt2irq(0x600)] = {IPRC, IPR_B0}, /* H-UDI */
+ [evt2irq(0x620)] = {IPRC, IPR_B12}, /* GPIO */
+ [evt2irq(0x640)] = {IPRC, IPR_B8}, /* DMAC DMTE0 */
+ [evt2irq(0x660)] = {IPRC, IPR_B8}, /* DMAC DMTE1 */
+ [evt2irq(0x680)] = {IPRC, IPR_B8}, /* DMAC DMTE2 */
+ [evt2irq(0x6a0)] = {IPRC, IPR_B8}, /* DMAC DMTE3 */
+ [evt2irq(0x6c0)] = {IPRC, IPR_B8}, /* DMAC DMAE */
+ [evt2irq(0x700)] = {IPRC, IPR_B4}, /* SCIF ERI */
+ [evt2irq(0x720)] = {IPRC, IPR_B4}, /* SCIF RXI */
+ [evt2irq(0x740)] = {IPRC, IPR_B4}, /* SCIF BRI */
+ [evt2irq(0x760)] = {IPRC, IPR_B4}, /* SCIF TXI */
+ [evt2irq(0x780)] = {IPRC, IPR_B8}, /* DMAC DMTE4 */
+ [evt2irq(0x7a0)] = {IPRC, IPR_B8}, /* DMAC DMTE5 */
+ [evt2irq(0x7c0)] = {IPRC, IPR_B8}, /* DMAC DMTE6 */
+ [evt2irq(0x7e0)] = {IPRC, IPR_B8}, /* DMAC DMTE7 */
+ [evt2irq(0xa00)] = {INTPRI00, IPR_B0}, /* PCIC PCISERR */
+ [evt2irq(0xa20)] = {INTPRI00, IPR_B4}, /* PCIC PCIDMA3 */
+ [evt2irq(0xa40)] = {INTPRI00, IPR_B4}, /* PCIC PCIDMA2 */
+ [evt2irq(0xa60)] = {INTPRI00, IPR_B4}, /* PCIC PCIDMA1 */
+ [evt2irq(0xa80)] = {INTPRI00, IPR_B4}, /* PCIC PCIDMA0 */
+ [evt2irq(0xaa0)] = {INTPRI00, IPR_B4}, /* PCIC PCIPWON */
+ [evt2irq(0xac0)] = {INTPRI00, IPR_B4}, /* PCIC PCIPWDWN */
+ [evt2irq(0xae0)] = {INTPRI00, IPR_B4}, /* PCIC PCIERR */
+ [evt2irq(0xb00)] = {INTPRI00, IPR_B8}, /* TMU3 */
+ [evt2irq(0xb80)] = {INTPRI00, IPR_B12}, /* TMU4 */
+};
+
+/*
+ * IPR registers have 4bit priority x 4 entry (16bits)
+ */
+static void update_ipr(struct sh7751_intc_priv *priv, unsigned int irq, u16 pri)
+{
+ const struct ipr *ipr = NULL;
+ void __iomem *ipr_base;
+ unsigned int offset;
+ u16 mask;
+
+ ipr = priv->iprmap + irq;
+ if (irq < GRP1_IRQ_START) {
+ /* Group0 */
+ ipr_base = priv->base + R_IPR;
+ offset = ipr->off;
+ } else {
+ /* Group1 */
+ ipr_base = priv->intpri00;
+ offset = ipr->off - INTPRI00;
+ }
+ mask = ~(IPR_PRI_MASK << ipr->idx);
+ pri = (pri & IPR_PRI_MASK) << ipr->idx;
+ mask &= __raw_readw(ipr_base + offset);
+ __raw_writew(mask | pri, ipr_base + offset);
+}
+
+static inline bool is_valid_irq(unsigned int irq)
+{
+ /* IRQ16 - 63 */
+ if (irq >= IRQ_START && irq < IRQ_START + NR_IPRMAP0)
+ return true;
+ /* IRQ80 - 92 */
+ if (irq >= GRP1_IRQ_START && irq <= IRQ_END)
+ return true;
+ return false;
+}
+
+static inline struct sh7751_intc_priv *irq_data_to_priv(struct irq_data *data)
+{
+ return data->domain->host_data;
+}
+
+/* Interrupt unmask priority is 1, mask priority is 0 */
+#define PRI_ENABLE 1
+#define PRI_DISABLE 0
+static void endisable_irq(struct irq_data *data, bool enable)
+{
+ struct sh7751_intc_priv *priv;
+ unsigned int irq;
+
+ priv = irq_data_to_priv(data);
+
+ irq = irqd_to_hwirq(data);
+ if (!is_valid_irq(irq)) {
+ /* IRQ out of range */
+ pr_warn_once("%s: IRQ %u is out of range\n", __FILE__, irq);
+ return;
+ }
+
+ if (irq <= MAX_IRL && !priv->irlm) {
+ /* IRL encoded external interrupt */
+ /* enable and disable from SR.IMASK */
+ update_sr_imask(irq - IRQ_START, enable);
+ } else {
+ /* Internal peripheral interrupt */
+ /* enable and disable from interrupt priority */
+ update_ipr(priv, irq, enable ? PRI_ENABLE : PRI_DISABLE);
+ }
+}
+
+static void sh7751_mask_irq(struct irq_data *data)
+{
+ endisable_irq(data, false);
+}
+
+static void sh7751_unmask_irq(struct irq_data *data)
+{
+ endisable_irq(data, true);
+}
+
+static const struct irq_chip sh7751_irq_chip = {
+ .name = "SH7751-INTC",
+ .irq_unmask = sh7751_unmask_irq,
+ .irq_mask = sh7751_mask_irq,
+};
+
+static int irq_sh7751_map(struct irq_domain *h, unsigned int virq,
+ irq_hw_number_t hw_irq_num)
+{
+ irq_set_chip_and_handler(virq, &sh7751_irq_chip, handle_level_irq);
+ irq_get_irq_data(virq)->chip_data = h->host_data;
+ irq_modify_status(virq, IRQ_NOREQUEST, IRQ_NOPROBE);
+ return 0;
+}
+
+static int irq_sh7751_xlate(struct irq_domain *d, struct device_node *ctrlr,
+ const u32 *intspec, unsigned int intsize,
+ unsigned long *out_hwirq, unsigned int *out_type)
+{
+ if (WARN_ON(intsize < 1))
+ return -EINVAL;
+ *out_hwirq = evt2irq(intspec[0]);
+ *out_type = IRQ_TYPE_NONE;
+ return 0;
+}
+
+static const struct irq_domain_ops irq_ops = {
+ .map = irq_sh7751_map,
+ .xlate = irq_sh7751_xlate,
+};
+
+static int __init shintc_of_init(struct device_node *intc, struct device_node *parent,
+ const struct ipr *iprmap)
+{
+ struct sh7751_intc_priv *priv;
+ void __iomem *base, *base2;
+ struct irq_domain *domain;
+ u16 icr;
+ int ret;
+
+ priv = kzalloc(sizeof(struct sh7751_intc_priv), GFP_KERNEL);
+ if (priv == NULL)
+ return -ENOMEM;
+
+ base = of_iomap(intc, 0);
+ base2 = of_iomap(intc, 1);
+ if (!base || !base2) {
+ pr_err("%pOFP: Invalid register definition\n", intc);
+ ret = -EINVAL;
+ goto error;
+ }
+
+ priv->base = base;
+ priv->intpri00 = base2;
+ priv->iprmap = iprmap;
+
+ if (of_property_read_bool(intc, "renesas,irlm")) {
+ priv->irlm = true;
+ icr = __raw_readw(priv->base + R_ICR);
+ icr |= ICR_IRLM;
+ __raw_writew(icr, priv->base + R_ICR);
+ }
+
+ domain = irq_domain_add_linear(intc, NR_IRQS, &irq_ops, priv);
+ if (domain == NULL) {
+ pr_err("%pOFP: cannot initialize irq domain\n", intc);
+ ret = -ENOMEM;
+ goto error;
+ }
+
+ irq_set_default_host(domain);
+ pr_info("%pOFP: SH7751 Interrupt controller (%s external IRQ)",
+ intc, priv->irlm ? "4 lines" : "15 level");
+ return 0;
+
+error:
+ if (base)
+ iounmap(base);
+ if (base2)
+ iounmap(base);
+ kfree(priv);
+ return ret;
+}
+
+static int __init sh7751_intc_of_init(struct device_node *intc,
+ struct device_node *parent)
+{
+ return shintc_of_init(intc, parent, sh7751_iprmap);
+}
+
+IRQCHIP_DECLARE(sh_7751_intc, "renesas,sh7751-intc", sh7751_intc_of_init);
--
2.39.2
next prev parent reply other threads:[~2024-04-04 5:01 UTC|newest]
Thread overview: 32+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-04-04 4:59 [PATCH v7 00/37] Device Tree support for SH7751 based board Yoshinori Sato
2024-04-04 4:59 ` [PATCH v7 01/37] sh: passing FDT address to kernel startup Yoshinori Sato
2024-04-04 4:59 ` [PATCH v7 02/37] sh: Kconfig unified OF supported targets Yoshinori Sato
2024-04-04 4:59 ` [PATCH v7 03/37] sh: Enable OF support for build and configuration Yoshinori Sato
2024-04-04 4:59 ` [PATCH v7 04/37] dt-bindings: interrupt-controller: Add header for Renesas SH3/4 INTC Yoshinori Sato
2024-04-04 6:07 ` Krzysztof Kozlowski
2024-04-04 4:59 ` [PATCH v7 05/37] sh: GENERIC_IRQ_CHIP support for CONFIG_OF=y Yoshinori Sato
2024-04-04 4:59 ` [PATCH v7 06/37] sh: kernel/setup Update DT support Yoshinori Sato
2024-04-04 4:59 ` [PATCH v7 07/37] sh: Fix COMMON_CLK support in CONFIG_OF=y Yoshinori Sato
2024-04-04 4:59 ` [PATCH v7 08/37] clocksource: sh_tmu: CLOCKSOURCE support Yoshinori Sato
2024-04-04 4:59 ` [PATCH v7 09/37] dt-binding: Add compatible SH7750 SoC Yoshinori Sato
2024-04-04 4:59 ` [PATCH v7 10/37] sh: Common PCI Framework driver support Yoshinori Sato
2024-04-04 4:59 ` [PATCH v7 11/37] pci: pci-sh7751: Add SH7751 PCI driver Yoshinori Sato
2024-04-08 21:32 ` Mayank Rana
2024-04-04 4:59 ` [PATCH v7 12/37] dt-bindings: pci: pci-sh7751: Add SH7751 PCI Yoshinori Sato
2024-04-04 4:59 ` [PATCH v7 13/37] dt-bindings: clock: sh7750-cpg: Add renesas,sh7750-cpg header Yoshinori Sato
2024-04-04 4:59 ` [PATCH v7 14/37] clk: Compatible with narrow registers Yoshinori Sato
2024-04-04 4:59 ` [PATCH v7 15/37] clk: renesas: Add SH7750/7751 CPG Driver Yoshinori Sato
2024-04-04 4:59 ` Yoshinori Sato [this message]
2024-04-04 4:59 ` [PATCH v7 17/37] dt-bindings: interrupt-controller: renesas,sh7751-intc: Add json-schema Yoshinori Sato
2024-04-04 4:59 ` [PATCH v7 18/37] irqchip: SH7751 external interrupt encoder with enable gate Yoshinori Sato
2024-04-04 4:59 ` [PATCH v7 19/37] dt-bindings: interrupt-controller: renesas,sh7751-irl-ext: Add json-schema Yoshinori Sato
2024-04-04 4:59 ` [PATCH v7 20/37] serial: sh-sci: fix SH4 OF support Yoshinori Sato
2024-04-04 4:59 ` [PATCH v7 21/37] dt-bindings: serial: renesas,scif: Add scif-sh7751 Yoshinori Sato
2024-04-04 5:00 ` [PATCH v7 22/37] dt-bindings: display: smi,sm501: SMI SM501 binding json-schema Yoshinori Sato
2024-04-04 5:00 ` [PATCH v7 23/37] dt-bindings: display: sm501 register definition helper Yoshinori Sato
2024-04-04 5:14 ` [RESEND v7 00/37] Device Tree support for SH7751 based board Yoshinori Sato
2024-04-04 7:06 ` [PATCH " Niklas Cassel
2024-04-04 13:46 ` Bjorn Helgaas
2024-05-18 9:08 ` [RESEND " John Paul Adrian Glaubitz
2024-05-20 13:06 ` Yoshinori Sato
2024-05-20 15:25 ` John Paul Adrian Glaubitz
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