ARM: mach-shmobile: sh73a0 INTCS support

Add INTCS support for the sh73a0 processor.

The interrupts on the sh73a0 processor are managed
through controllers such as GIC, INTCS and INTCA.

The ARM cores use the GIC as primary interrupt
controller and the INTCS and INTCA are hanging off
the GIC as cascaded interrupt controllers.

Peripherals connected both to the GIC and the INTC
controllers should if possible only use the GIC.

If no GIC connection is available then INTCS and
INTCA may be used instead.

Signed-off-by: Magnus Damm <damm@opensource.se>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>

4 files changed, 271 insertions, 4 deletions

diff --git a/arch/arm/mach-shmobile/Makefile b/arch/arm/mach-shmobile/Makefile
index f5ad0892984d..ab100e4bddd6 100644
--- a/arch/arm/mach-shmobile/Makefile
+++ b/arch/arm/mach-shmobile/Makefile
@@ -9,7 +9,7 @@ obj-y				:= timer.o console.o clock.o pm_runtime.o
 obj-$(CONFIG_ARCH_SH7367)       += setup-sh7367.o clock-sh7367.o intc-sh7367.o
 obj-$(CONFIG_ARCH_SH7377)       += setup-sh7377.o clock-sh7377.o intc-sh7377.o
 obj-$(CONFIG_ARCH_SH7372)       += setup-sh7372.o clock-sh7372.o intc-sh7372.o
-obj-$(CONFIG_ARCH_SH73A0)       += setup-sh73a0.o clock-sh73a0.o
+obj-$(CONFIG_ARCH_SH73A0)       += setup-sh73a0.o clock-sh73a0.o intc-sh73a0.o
 
 # Pinmux setup
 pfc-y                           :=
diff --git a/arch/arm/mach-shmobile/board-ag5evm.c b/arch/arm/mach-shmobile/board-ag5evm.c
index d4c82bd42524..85f9269d83ca 100644
--- a/arch/arm/mach-shmobile/board-ag5evm.c
+++ b/arch/arm/mach-shmobile/board-ag5evm.c
@@ -179,12 +179,11 @@ static void __init ag5evm_map_io(void)
 
 void __init ag5evm_init_irq(void)
 {
+        sh73a0_init_irq();
+
         /* setup PINT: enable PINTA2 as active low */
         __raw_writel(__raw_readl(PINTER0A) | (1<<29), PINTER0A);
         __raw_writew(__raw_readw(PINTCR0A) | (2<<10), PINTCR0A);
-
-        gic_dist_init(0, __io(0xf0001000), 29);
-        gic_cpu_init(0, __io(0xf0000100));
 }
 
 static void __init ag5evm_init(void)
diff --git a/arch/arm/mach-shmobile/include/mach/common.h b/arch/arm/mach-shmobile/include/mach/common.h
index 15932fd2435e..49ac8ebdc184 100644
--- a/arch/arm/mach-shmobile/include/mach/common.h
+++ b/arch/arm/mach-shmobile/include/mach/common.h
@@ -30,6 +30,7 @@ extern void sh7372_pinmux_init(void);
 extern struct clk sh7372_extal1_clk;
 extern struct clk sh7372_extal2_clk;
 
+extern void sh73a0_init_irq(void);
 extern void sh73a0_add_early_devices(void);
 extern void sh73a0_add_standard_devices(void);
 extern void sh73a0_clock_init(void);
diff --git a/arch/arm/mach-shmobile/intc-sh73a0.c b/arch/arm/mach-shmobile/intc-sh73a0.c
new file mode 100644
index 000000000000..5af2be07c2b8
--- /dev/null
+++ b/arch/arm/mach-shmobile/intc-sh73a0.c
@@ -0,0 +1,267 @@
+/*
+ * sh73a0 processor support - INTC hardware block
+ *
+ * Copyright (C) 2010  Magnus Damm
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+ */
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/interrupt.h>
+#include <linux/irq.h>
+#include <linux/io.h>
+#include <linux/sh_intc.h>
+#include <asm/hardware/gic.h>
+#include <asm/mach-types.h>
+#include <asm/mach/arch.h>
+
+enum {
+        UNUSED = 0,
+
+        /* interrupt sources INTCS */
+        PINTCS_PINT1, PINTCS_PINT2,
+        RTDMAC_0_DEI0, RTDMAC_0_DEI1, RTDMAC_0_DEI2, RTDMAC_0_DEI3,
+        CEU, MFI, BBIF2, VPU, TSIF1, _3DG_SGX543, _2DDMAC_2DDM0,
+        RTDMAC_1_DEI4, RTDMAC_1_DEI5, RTDMAC_1_DADERR,
+        KEYSC_KEY, VINT, MSIOF,
+        TMU0_TUNI00, TMU0_TUNI01, TMU0_TUNI02,
+        CMT0, TSIF0, CMT2, LMB, MSUG, MSU_MSU, MSU_MSU2,
+        CTI, RWDT0, ICB, PEP, ASA, JPU_JPEG, LCDC, LCRC,
+        RTDMAC_2_DEI6, RTDMAC_2_DEI7, RTDMAC_2_DEI8, RTDMAC_2_DEI9,
+        RTDMAC_3_DEI10, RTDMAC_3_DEI11,
+        FRC, GCU, LCDC1, CSIRX,
+        DSITX0_DSITX00, DSITX0_DSITX01,
+        SPU2_SPU0, SPU2_SPU1, FSI,
+        TMU1_TUNI10, TMU1_TUNI11, TMU1_TUNI12,
+        TSIF2, CMT4, MFIS2, CPORTS2R, TSG, DMASCH1, SCUW,
+        VIO60, VIO61, CEU21, CSI21, DSITX1_DSITX10, DSITX1_DSITX11,
+        DISP, DSRV, EMUX2_EMUX20I, EMUX2_EMUX21I,
+        MSTIF0_MST00I, MSTIF0_MST01I, MSTIF1_MST10I, MSTIF1_MST11I,
+        SPUV,
+
+        /* interrupt groups INTCS */
+        RTDMAC_0, RTDMAC_1, RTDMAC_2, RTDMAC_3,
+        DSITX0, SPU2, TMU1, MSU,
+};
+
+static struct intc_vect intcs_vectors[] = {
+        INTCS_VECT(PINTCS_PINT1, 0x0600), INTCS_VECT(PINTCS_PINT2, 0x0620),
+        INTCS_VECT(RTDMAC_0_DEI0, 0x0800), INTCS_VECT(RTDMAC_0_DEI1, 0x0820),
+        INTCS_VECT(RTDMAC_0_DEI2, 0x0840), INTCS_VECT(RTDMAC_0_DEI3, 0x0860),
+        INTCS_VECT(CEU, 0x0880), INTCS_VECT(MFI, 0x0900),
+        INTCS_VECT(BBIF2, 0x0960), INTCS_VECT(VPU, 0x0980),
+        INTCS_VECT(TSIF1, 0x09a0), INTCS_VECT(_3DG_SGX543, 0x09e0),
+        INTCS_VECT(_2DDMAC_2DDM0, 0x0a00),
+        INTCS_VECT(RTDMAC_1_DEI4, 0x0b80), INTCS_VECT(RTDMAC_1_DEI5, 0x0ba0),
+        INTCS_VECT(RTDMAC_1_DADERR, 0x0bc0),
+        INTCS_VECT(KEYSC_KEY, 0x0be0), INTCS_VECT(VINT, 0x0c80),
+        INTCS_VECT(MSIOF, 0x0d20),
+        INTCS_VECT(TMU0_TUNI00, 0x0e80), INTCS_VECT(TMU0_TUNI01, 0x0ea0),
+        INTCS_VECT(TMU0_TUNI02, 0x0ec0),
+        INTCS_VECT(CMT0, 0x0f00), INTCS_VECT(TSIF0, 0x0f20),
+        INTCS_VECT(CMT2, 0x0f40), INTCS_VECT(LMB, 0x0f60),
+        INTCS_VECT(MSUG, 0x0f80),
+        INTCS_VECT(MSU_MSU, 0x0fa0), INTCS_VECT(MSU_MSU2, 0x0fc0),
+        INTCS_VECT(CTI, 0x0400), INTCS_VECT(RWDT0, 0x0440),
+        INTCS_VECT(ICB, 0x0480), INTCS_VECT(PEP, 0x04a0),
+        INTCS_VECT(ASA, 0x04c0), INTCS_VECT(JPU_JPEG, 0x0560),
+        INTCS_VECT(LCDC, 0x0580), INTCS_VECT(LCRC, 0x05a0),
+        INTCS_VECT(RTDMAC_2_DEI6, 0x1300), INTCS_VECT(RTDMAC_2_DEI7, 0x1320),
+        INTCS_VECT(RTDMAC_2_DEI8, 0x1340), INTCS_VECT(RTDMAC_2_DEI9, 0x1360),
+        INTCS_VECT(RTDMAC_3_DEI10, 0x1380), INTCS_VECT(RTDMAC_3_DEI11, 0x13a0),
+        INTCS_VECT(FRC, 0x1700), INTCS_VECT(GCU, 0x1760),
+        INTCS_VECT(LCDC1, 0x1780), INTCS_VECT(CSIRX, 0x17a0),
+        INTCS_VECT(DSITX0_DSITX00, 0x17c0), INTCS_VECT(DSITX0_DSITX01, 0x17e0),
+        INTCS_VECT(SPU2_SPU0, 0x1800), INTCS_VECT(SPU2_SPU1, 0x1820),
+        INTCS_VECT(FSI, 0x1840),
+        INTCS_VECT(TMU1_TUNI10, 0x1900), INTCS_VECT(TMU1_TUNI11, 0x1920),
+        INTCS_VECT(TMU1_TUNI12, 0x1940),
+        INTCS_VECT(TSIF2, 0x1960), INTCS_VECT(CMT4, 0x1980),
+        INTCS_VECT(MFIS2, 0x1a00), INTCS_VECT(CPORTS2R, 0x1a20),
+        INTCS_VECT(TSG, 0x1ae0), INTCS_VECT(DMASCH1, 0x1b00),
+        INTCS_VECT(SCUW, 0x1b40),
+        INTCS_VECT(VIO60, 0x1b60), INTCS_VECT(VIO61, 0x1b80),
+        INTCS_VECT(CEU21, 0x1ba0), INTCS_VECT(CSI21, 0x1be0),
+        INTCS_VECT(DSITX1_DSITX10, 0x1c00), INTCS_VECT(DSITX1_DSITX11, 0x1c20),
+        INTCS_VECT(DISP, 0x1c40), INTCS_VECT(DSRV, 0x1c60),
+        INTCS_VECT(EMUX2_EMUX20I, 0x1c80), INTCS_VECT(EMUX2_EMUX21I, 0x1ca0),
+        INTCS_VECT(MSTIF0_MST00I, 0x1cc0), INTCS_VECT(MSTIF0_MST01I, 0x1ce0),
+        INTCS_VECT(MSTIF1_MST10I, 0x1d00), INTCS_VECT(MSTIF1_MST11I, 0x1d20),
+        INTCS_VECT(SPUV, 0x2300),
+};
+
+static struct intc_group intcs_groups[] __initdata = {
+        INTC_GROUP(RTDMAC_0, RTDMAC_0_DEI0, RTDMAC_0_DEI1,
+                   RTDMAC_0_DEI2, RTDMAC_0_DEI3),
+        INTC_GROUP(RTDMAC_1, RTDMAC_1_DEI4, RTDMAC_1_DEI5, RTDMAC_1_DADERR),
+        INTC_GROUP(RTDMAC_2, RTDMAC_2_DEI6, RTDMAC_2_DEI7,
+                   RTDMAC_2_DEI8, RTDMAC_2_DEI9),
+        INTC_GROUP(RTDMAC_3, RTDMAC_3_DEI10, RTDMAC_3_DEI11),
+        INTC_GROUP(TMU1, TMU1_TUNI12, TMU1_TUNI11, TMU1_TUNI10),
+        INTC_GROUP(DSITX0, DSITX0_DSITX00, DSITX0_DSITX01),
+        INTC_GROUP(SPU2, SPU2_SPU0, SPU2_SPU1),
+        INTC_GROUP(MSU, MSU_MSU, MSU_MSU2),
+};
+
+static struct intc_mask_reg intcs_mask_registers[] = {
+        { 0xffd20184, 0xffd201c4, 8, /* IMR1SA / IMCR1SA */
+          { 0, 0, 0, CEU,
+            0, 0, 0, 0 } },
+        { 0xffd20188, 0xffd201c8, 8, /* IMR2SA / IMCR2SA */
+          { 0, 0, 0, VPU,
+            BBIF2, 0, 0, MFI } },
+        { 0xffd2018c, 0xffd201cc, 8, /* IMR3SA / IMCR3SA */
+          { 0, 0, 0, _2DDMAC_2DDM0,
+            0, ASA, PEP, ICB } },
+        { 0xffd20190, 0xffd201d0, 8, /* IMR4SA / IMCR4SA */
+          { 0, 0, 0, CTI,
+            JPU_JPEG, 0, LCRC, LCDC } },
+        { 0xffd20194, 0xffd201d4, 8, /* IMR5SA / IMCR5SA */
+          { KEYSC_KEY, RTDMAC_1_DADERR, RTDMAC_1_DEI5, RTDMAC_1_DEI4,
+            RTDMAC_0_DEI3, RTDMAC_0_DEI2, RTDMAC_0_DEI1, RTDMAC_0_DEI0 } },
+        { 0xffd20198, 0xffd201d8, 8, /* IMR6SA / IMCR6SA */
+          { 0, 0, MSIOF, 0,
+            _3DG_SGX543, 0, 0, 0 } },
+        { 0xffd2019c, 0xffd201dc, 8, /* IMR7SA / IMCR7SA */
+          { 0, TMU0_TUNI02, TMU0_TUNI01, TMU0_TUNI00,
+            0, 0, 0, 0 } },
+        { 0xffd201a0, 0xffd201e0, 8, /* IMR8SA / IMCR8SA */
+          { 0, 0, 0, 0,
+            0, MSU_MSU, MSU_MSU2, MSUG } },
+        { 0xffd201a4, 0xffd201e4, 8, /* IMR9SA / IMCR9SA */
+          { 0, RWDT0, CMT2, CMT0,
+            0, 0, 0, 0 } },
+        { 0xffd201ac, 0xffd201ec, 8, /* IMR11SA / IMCR11SA */
+          { 0, 0, 0, 0,
+            0, TSIF1, LMB, TSIF0 } },
+        { 0xffd201b0, 0xffd201f0, 8, /* IMR12SA / IMCR12SA */
+          { 0, 0, 0, 0,
+            0, 0, PINTCS_PINT2, PINTCS_PINT1 } },
+        { 0xffd50180, 0xffd501c0, 8, /* IMR0SA3 / IMCR0SA3 */
+          { RTDMAC_2_DEI6, RTDMAC_2_DEI7, RTDMAC_2_DEI8, RTDMAC_2_DEI9,
+            RTDMAC_3_DEI10, RTDMAC_3_DEI11, 0, 0 } },
+        { 0xffd50190, 0xffd501d0, 8, /* IMR4SA3 / IMCR4SA3 */
+          { FRC, 0, 0, GCU,
+            LCDC1, CSIRX, DSITX0_DSITX00, DSITX0_DSITX01 } },
+        { 0xffd50194, 0xffd501d4, 8, /* IMR5SA3 / IMCR5SA3 */
+          { SPU2_SPU0, SPU2_SPU1, FSI, 0,
+            0, 0, 0, 0 } },
+        { 0xffd50198, 0xffd501d8, 8, /* IMR6SA3 / IMCR6SA3 */
+          { TMU1_TUNI10, TMU1_TUNI11, TMU1_TUNI12, 0,
+            TSIF2, CMT4, 0, 0 } },
+        { 0xffd5019c, 0xffd501dc, 8, /* IMR7SA3 / IMCR7SA3 */
+          { MFIS2, CPORTS2R, 0, 0,
+            0, 0, 0, TSG } },
+        { 0xffd501a0, 0xffd501e0, 8, /* IMR8SA3 / IMCR8SA3 */
+          { DMASCH1, 0, SCUW, VIO60,
+            VIO61, CEU21, 0, CSI21 } },
+        { 0xffd501a4, 0xffd501e4, 8, /* IMR9SA3 / IMCR9SA3 */
+          { DSITX1_DSITX10, DSITX1_DSITX11, DISP, DSRV,
+            EMUX2_EMUX20I, EMUX2_EMUX21I, MSTIF0_MST00I, MSTIF0_MST01I } },
+        { 0xffd501a8, 0xffd501e8, 8, /* IMR10SA3 / IMCR10SA3 */
+          { MSTIF0_MST00I, MSTIF0_MST01I, 0, 0,
+            0, 0, 0, 0  } },
+        { 0xffd60180, 0xffd601c0, 8, /* IMR0SA4 / IMCR0SA4 */
+          { SPUV, 0, 0, 0,
+            0, 0, 0, 0  } },
+};
+
+/* Priority is needed for INTCA to receive the INTCS interrupt */
+static struct intc_prio_reg intcs_prio_registers[] = {
+        { 0xffd20000, 0, 16, 4, /* IPRAS */ { CTI, 0, _2DDMAC_2DDM0, ICB } },
+        { 0xffd20004, 0, 16, 4, /* IPRBS */ { JPU_JPEG, LCDC, 0, LCRC } },
+        { 0xffd20008, 0, 16, 4, /* IPRCS */ { BBIF2, 0, 0, 0 } },
+        { 0xffd2000c, 0, 16, 4, /* IPRDS */ { PINTCS_PINT1, PINTCS_PINT2,
+                                              0, 0 } },
+        { 0xffd20010, 0, 16, 4, /* IPRES */ { RTDMAC_0, CEU, MFI, VPU } },
+        { 0xffd20014, 0, 16, 4, /* IPRFS */ { KEYSC_KEY, RTDMAC_1,
+                                              CMT2, CMT0 } },
+        { 0xffd20018, 0, 16, 4, /* IPRGS */ { TMU0_TUNI00, TMU0_TUNI01,
+                                              TMU0_TUNI02, TSIF1 } },
+        { 0xffd2001c, 0, 16, 4, /* IPRHS */ { VINT, 0, 0, 0 } },
+        { 0xffd20020, 0, 16, 4, /* IPRIS */ { 0, MSIOF, TSIF0, 0 } },
+        { 0xffd20024, 0, 16, 4, /* IPRJS */ { 0, _3DG_SGX543, MSUG, MSU } },
+        { 0xffd20028, 0, 16, 4, /* IPRKS */ { 0, ASA, LMB, PEP } },
+        { 0xffd20030, 0, 16, 4, /* IPRMS */ { 0, 0, 0, RWDT0 } },
+        { 0xffd50000, 0, 16, 4, /* IPRAS3 */ { RTDMAC_2, 0, 0, 0 } },
+        { 0xffd50004, 0, 16, 4, /* IPRBS3 */ { RTDMAC_3, 0, 0, 0 } },
+        { 0xffd50020, 0, 16, 4, /* IPRIS3 */ { FRC, 0, 0, 0 } },
+        { 0xffd50024, 0, 16, 4, /* IPRJS3 */ { LCDC1, CSIRX, DSITX0, 0 } },
+        { 0xffd50028, 0, 16, 4, /* IPRKS3 */ { SPU2, 0, FSI, 0 } },
+        { 0xffd50030, 0, 16, 4, /* IPRMS3 */ { TMU1, 0, 0, TSIF2 } },
+        { 0xffd50034, 0, 16, 4, /* IPRNS3 */ { CMT4, 0, 0, 0 } },
+        { 0xffd50038, 0, 16, 4, /* IPROS3 */ { MFIS2, CPORTS2R, 0, 0 } },
+        { 0xffd50040, 0, 16, 4, /* IPRQS3 */ { DMASCH1, 0, SCUW, VIO60 } },
+        { 0xffd50044, 0, 16, 4, /* IPRRS3 */ { VIO61, CEU21, 0, CSI21 } },
+        { 0xffd50048, 0, 16, 4, /* IPRSS3 */ { DSITX1_DSITX10, DSITX1_DSITX11,
+                                               DISP, DSRV } },
+        { 0xffd5004c, 0, 16, 4, /* IPRTS3 */ { EMUX2_EMUX20I, EMUX2_EMUX21I,
+                                               MSTIF0_MST00I, MSTIF0_MST01I } },
+        { 0xffd50050, 0, 16, 4, /* IPRUS3 */ { MSTIF1_MST10I, MSTIF1_MST11I,
+                                               0, 0 } },
+        { 0xffd60000, 0, 16, 4, /* IPRAS4 */ { SPUV, 0, 0, 0 } },
+};
+
+static struct resource intcs_resources[] __initdata = {
+        [0] = {
+                .start  = 0xffd20000,
+                .end    = 0xffd201ff,
+                .flags  = IORESOURCE_MEM,
+        },
+        [1] = {
+                .start  = 0xffd50000,
+                .end    = 0xffd501ff,
+                .flags  = IORESOURCE_MEM,
+        },
+        [2] = {
+                .start  = 0xffd60000,
+                .end    = 0xffd601ff,
+                .flags  = IORESOURCE_MEM,
+        }
+};
+
+static struct intc_desc intcs_desc __initdata = {
+        .name = "sh73a0-intcs",
+        .resource = intcs_resources,
+        .num_resources = ARRAY_SIZE(intcs_resources),
+        .hw = INTC_HW_DESC(intcs_vectors, intcs_groups, intcs_mask_registers,
+                           intcs_prio_registers, NULL, NULL),
+};
+
+static struct irqaction sh73a0_intcs_cascade;
+
+static irqreturn_t sh73a0_intcs_demux(int irq, void *dev_id)
+{
+        unsigned int evtcodeas = ioread32((void __iomem *)dev_id);
+
+        generic_handle_irq(intcs_evt2irq(evtcodeas));
+
+        return IRQ_HANDLED;
+}
+
+void __init sh73a0_init_irq(void)
+{
+        void __iomem *intevtsa = ioremap_nocache(0xffd20100, PAGE_SIZE);
+
+        gic_dist_init(0, __io(0xf0001000), 29);
+        gic_cpu_init(0, __io(0xf0000100));
+
+        register_intc_controller(&intcs_desc);
+
+        /* demux using INTEVTSA */
+        sh73a0_intcs_cascade.name = "INTCS cascade";
+        sh73a0_intcs_cascade.handler = sh73a0_intcs_demux;
+        sh73a0_intcs_cascade.dev_id = intevtsa;
+        setup_irq(gic_spi(50), &sh73a0_intcs_cascade);
+}