sh: intc - convert board specific r2d code

This patch converts the board specific interrupt code for r2d to make
use of intc. While at it we improve the Kconfig to avoid confusion.

- Two sets of interrupt tables exist - one for R2D-1 and one for R2D-PLUS.
- R2D-1 and R2D-PLUS use the same irq constants.
- R2D-1 has AX88796 support, R2D-PLUS does not hook up that IRQ.
- R2D-PLUS has KEY support, R2D-1 does not hook up that IRQ.
- The number and order of IRQ values are disconnected from register bits.
- Interrupt sources now start from IRQ 100.
- The machvec demux function converts from irlm IRQ 0-14 to IRQ 100++.

Tested on R2D-1 and R2D-PLUS boards.

Version 2 adds CONFIG_RTS7751R2D_1 and CONFIG_RTS7751R2D_PLUS together
with intc structured as __initdata.

Signed-off-by: Magnus Damm <damm@igel.co.jp>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>

3 files changed, 147 insertions, 58 deletions

diff --git a/arch/sh/boards/renesas/rts7751r2d/Kconfig b/arch/sh/boards/renesas/rts7751r2d/Kconfig
index 7780d1fb13ff..925a7aa861a7 100644
--- a/arch/sh/boards/renesas/rts7751r2d/Kconfig
+++ b/arch/sh/boards/renesas/rts7751r2d/Kconfig
@@ -2,10 +2,28 @@ if SH_RTS7751R2D
 
 menu "RTS7751R2D options"
 
-config RTS7751R2D_REV11
-        bool "RTS7751R2D Rev. 1.1 board support"
+choice
+        prompt "R2D Board Revision"
+        default RTS7751R2D_PLUS
+
+config RTS7751R2D_PLUS
+        bool "R2D-PLUS"
+        help
+          Selecting this option will configure the kernel for R2D-PLUS.
+
+          R2D-PLUS is the smaller of the two R2D board versions, equipped
+          with a single PCI slot.
+
+config RTS7751R2D_1
+        bool "R2D-1"
         help
-          Selecting this option will support version rev. 1.1.
+          Selecting this option will configure the kernel for R2D-1.
+
+          R2D-1 is the larger of the two R2D board versions, equipped
+          with two PCI slots.
+
+endchoice
+
 endmenu
 
 endif
diff --git a/arch/sh/boards/renesas/rts7751r2d/irq.c b/arch/sh/boards/renesas/rts7751r2d/irq.c
index b97c25de3a41..e89932903caf 100644
--- a/arch/sh/boards/renesas/rts7751r2d/irq.c
+++ b/arch/sh/boards/renesas/rts7751r2d/irq.c
@@ -1,9 +1,10 @@
 /*
  * linux/arch/sh/boards/renesas/rts7751r2d/irq.c
  *
+ * Copyright (C) 2007  Magnus Damm
  * Copyright (C) 2000  Kazumoto Kojima
  *
- * Renesas Technology Sales RTS7751R2D Support.
+ * Renesas Technology Sales RTS7751R2D Support, R2D-PLUS and R2D-1.
  *
  * Modified for RTS7751R2D by
  * Atom Create Engineering Co., Ltd. 2002.
@@ -16,67 +17,141 @@
 #include <asm/voyagergx.h>
 #include <asm/rts7751r2d.h>
 
-#if defined(CONFIG_RTS7751R2D_REV11)
-static int mask_pos[] = {11, 9, 8, 12, 10, 6, 5, 4, 7, 14, 13, 0, 0, 0, 0};
-#else
-static int mask_pos[] = {6, 11, 9, 8, 12, 10, 5, 4, 7, 14, 13, 0, 0, 0, 0};
-#endif
+#define R2D_NR_IRL 13
 
-static void enable_rts7751r2d_irq(unsigned int irq)
-{
-        /* Set priority in IPR back to original value */
-        ctrl_outw(ctrl_inw(IRLCNTR1) | (1 << mask_pos[irq]), IRLCNTR1);
-}
+enum {
+        UNUSED = 0,
 
-static void disable_rts7751r2d_irq(unsigned int irq)
-{
-        /* Set the priority in IPR to 0 */
-        ctrl_outw(ctrl_inw(IRLCNTR1) & (0xffff ^ (1 << mask_pos[irq])),
-                  IRLCNTR1);
-}
+        /* board specific interrupt sources (R2D-1 and R2D-PLUS) */
+        EXT,              /* EXT_INT0-3 */
+        RTC_T, RTC_A,     /* Real Time Clock */
+        AX88796,          /* Ethernet controller (R2D-1 board) */
+        KEY,              /* Key input (R2D-PLUS board) */
+        SDCARD,           /* SD Card */
+        CF_CD, CF_IDE,    /* CF Card Detect + CF IDE */
+        SM501,            /* SM501 aka Voyager */
+        PCI_INTD_RTL8139, /* Ethernet controller */
+        PCI_INTC_PCI1520, /* Cardbus/PCMCIA bridge */
+        PCI_INTB_RTL8139, /* Ethernet controller with HUB (R2D-PLUS board) */
+        PCI_INTB_SLOT,    /* PCI Slot 3.3v (R2D-1 board) */
+        PCI_INTA_SLOT,    /* PCI Slot 3.3v */
+        TP,               /* Touch Panel */
+};
+
+#ifdef CONFIG_RTS7751R2D_1
+
+/* Vectors for R2D-1 */
+static struct intc_vect vectors_r2d_1[] __initdata = {
+        INTC_IRQ(EXT, IRQ_EXT),
+        INTC_IRQ(RTC_T, IRQ_RTC_T), INTC_IRQ(RTC_A, IRQ_RTC_A),
+        INTC_IRQ(AX88796, IRQ_AX88796), INTC_IRQ(SDCARD, IRQ_SDCARD),
+        INTC_IRQ(CF_CD, IRQ_CF_CD), INTC_IRQ(CF_IDE, IRQ_CF_IDE), /* ng */
+        INTC_IRQ(SM501, IRQ_VOYAGER),
+        INTC_IRQ(PCI_INTD_RTL8139, IRQ_PCI_INTD),
+        INTC_IRQ(PCI_INTC_PCI1520, IRQ_PCI_INTC),
+        INTC_IRQ(PCI_INTB_SLOT, IRQ_PCI_INTB),
+        INTC_IRQ(PCI_INTA_SLOT, IRQ_PCI_INTA),
+        INTC_IRQ(TP, IRQ_TP),
+};
+
+/* IRLMSK mask register layout for R2D-1 */
+static struct intc_mask_reg mask_registers_r2d_1[] __initdata = {
+        { 0xa4000000, 0, 16, /* IRLMSK */
+          { TP, PCI_INTA_SLOT, PCI_INTB_SLOT,
+            PCI_INTC_PCI1520, PCI_INTD_RTL8139,
+            SM501, CF_IDE, CF_CD, SDCARD, AX88796,
+            RTC_A, RTC_T, 0, 0, 0, EXT } },
+};
+
+/* IRLn to IRQ table for R2D-1 */
+static unsigned char irl2irq_r2d_1[R2D_NR_IRL] __initdata = {
+        IRQ_PCI_INTD, IRQ_CF_IDE, IRQ_CF_CD, IRQ_PCI_INTC,
+        IRQ_VOYAGER, IRQ_AX88796, IRQ_RTC_A, IRQ_RTC_T,
+        IRQ_SDCARD, IRQ_PCI_INTA, IRQ_PCI_INTB, IRQ_EXT,
+        IRQ_TP,
+};
+
+static __initdata DECLARE_INTC_DESC(intc_desc_r2d_1, "r2d-1",
+                                    vectors_r2d_1, NULL, NULL,
+                                    mask_registers_r2d_1, NULL, NULL);
+
+#endif /* CONFIG_RTS7751R2D_1 */
+
+#ifdef CONFIG_RTS7751R2D_PLUS
+
+/* Vectors for R2D-PLUS */
+static struct intc_vect vectors_r2d_plus[] __initdata = {
+        INTC_IRQ(EXT, IRQ_EXT),
+        INTC_IRQ(RTC_T, IRQ_RTC_T), INTC_IRQ(RTC_A, IRQ_RTC_A),
+        INTC_IRQ(KEY, IRQ_KEY), INTC_IRQ(SDCARD, IRQ_SDCARD),
+        INTC_IRQ(CF_CD, IRQ_CF_CD), INTC_IRQ(CF_IDE, IRQ_CF_IDE),
+        INTC_IRQ(SM501, IRQ_VOYAGER),
+        INTC_IRQ(PCI_INTD_RTL8139, IRQ_PCI_INTD),
+        INTC_IRQ(PCI_INTC_PCI1520, IRQ_PCI_INTC),
+        INTC_IRQ(PCI_INTB_RTL8139, IRQ_PCI_INTB),
+        INTC_IRQ(PCI_INTA_SLOT, IRQ_PCI_INTA),
+        INTC_IRQ(TP, IRQ_TP),
+};
+
+/* IRLMSK mask register layout for R2D-PLUS */
+static struct intc_mask_reg mask_registers_r2d_plus[] __initdata = {
+        { 0xa4000000, 0, 16, /* IRLMSK */
+          { TP, PCI_INTA_SLOT, PCI_INTB_RTL8139,
+            PCI_INTC_PCI1520, PCI_INTD_RTL8139,
+            SM501, CF_IDE, CF_CD, SDCARD, KEY,
+            RTC_A, RTC_T, 0, 0, 0, EXT } },
+};
+
+/* IRLn to IRQ table for R2D-PLUS */
+static unsigned char irl2irq_r2d_plus[R2D_NR_IRL] __initdata = {
+        IRQ_PCI_INTD, IRQ_CF_IDE, IRQ_CF_CD, IRQ_PCI_INTC,
+        IRQ_VOYAGER, IRQ_KEY, IRQ_RTC_A, IRQ_RTC_T,
+        IRQ_SDCARD, IRQ_PCI_INTA, IRQ_PCI_INTB, IRQ_EXT,
+        IRQ_TP,
+};
+
+static __initdata DECLARE_INTC_DESC(intc_desc_r2d_plus, "r2d-plus",
+                                    vectors_r2d_plus, NULL, NULL,
+                                    mask_registers_r2d_plus, NULL, NULL);
+
+#endif /* CONFIG_RTS7751R2D_PLUS */
+
+static unsigned char irl2irq[R2D_NR_IRL];
 
 int rts7751r2d_irq_demux(int irq)
 {
-        return irq;
-}
+        if (irq >= R2D_NR_IRL || !irl2irq[irq])
+                return irq;
 
-static struct irq_chip rts7751r2d_irq_chip __read_mostly = {
-        .name           = "rts7751r2d",
-        .mask           = disable_rts7751r2d_irq,
-        .unmask         = enable_rts7751r2d_irq,
-        .mask_ack       = disable_rts7751r2d_irq,
-};
+        return irl2irq[irq];
+}
 
 /*
  * Initialize IRQ setting
  */
 void __init init_rts7751r2d_IRQ(void)
 {
-        int i;
-
-        /* IRL0=KEY Input
-         * IRL1=Ethernet
-         * IRL2=CF Card
-         * IRL3=CF Card Insert
-         * IRL4=PCMCIA
-         * IRL5=VOYAGER
-         * IRL6=RTC Alarm
-         * IRL7=RTC Timer
-         * IRL8=SD Card
-         * IRL9=PCI Slot #1
-         * IRL10=PCI Slot #2
-         * IRL11=Extention #0
-         * IRL12=Extention #1
-         * IRL13=Extention #2
-         * IRL14=Extention #3
-         */
-
-        for (i=0; i<15; i++) {
-                disable_irq_nosync(i);
-                set_irq_chip_and_handler_name(i, &rts7751r2d_irq_chip,
-                                              handle_level_irq, "level");
-                enable_rts7751r2d_irq(i);
+        struct intc_desc *d;
+
+        switch (ctrl_inw(PA_BVERREG)) {
+#ifdef CONFIG_RTS7751R2D_PLUS
+        case 0x10:
+                printk(KERN_INFO "Using R2D-PLUS interrupt controller.\n");
+                d = &intc_desc_r2d_plus;
+                memcpy(irl2irq, irl2irq_r2d_plus, R2D_NR_IRL);
+                break;
+#endif
+#ifdef CONFIG_RTS7751R2D_1
+        case 0x11:
+                printk(KERN_INFO "Using R2D-1 interrupt controller.\n");
+                d = &intc_desc_r2d_1;
+                memcpy(irl2irq, irl2irq_r2d_1, R2D_NR_IRL);
+                break;
+#endif
+        default:
+                return;
         }
 
+        register_intc_controller(d);
         setup_voyagergx_irq();
 }
diff --git a/arch/sh/boards/renesas/rts7751r2d/setup.c b/arch/sh/boards/renesas/rts7751r2d/setup.c
index 4d1bbd30e52b..90703d5d1230 100644
--- a/arch/sh/boards/renesas/rts7751r2d/setup.c
+++ b/arch/sh/boards/renesas/rts7751r2d/setup.c
@@ -54,11 +54,7 @@ static struct resource cf_ide_resources[] = {
                 .flags  = IORESOURCE_MEM,
         },
         [2] = {
-#ifdef CONFIG_RTS7751R2D_REV11
-                .start  = 1,
-#else
-                .start  = 2,
-#endif
+                .start  = IRQ_CF_IDE,
                 .flags  = IORESOURCE_IRQ,
         },
 };
@@ -147,7 +143,7 @@ static int __init rts7751r2d_devices_setup(void)
 {
         int ret;
 
-        if (ctrl_inw(PA_BVERREG) == 0x10) { /* only working on R2D-PLUS */
+        if (ctrl_inw(PA_BVERREG) == 0x10) { /* R2D-PLUS */
                 ret = platform_device_register(&cf_ide_device);
                 if (ret)
                         return ret;