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

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

arch/sh/boards/renesas/rts7751r2d/irq.c

 /*
  * 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();
 }

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;

arch/sh/drivers/pci/ops-rts7751r2d.c

@@ -19,10 +19,10 @@
 #include "pci-sh4.h"
 
 static u8 rts7751r2d_irq_tab[] __initdata = {
-	IRQ_PCISLOT1,
-	IRQ_PCISLOT2,
-	IRQ_PCMCIA,
-	IRQ_PCIETH,
+	IRQ_PCI_INTA,
+	IRQ_PCI_INTB,
+	IRQ_PCI_INTC,
+	IRQ_PCI_INTD,
 };
 
 int __init pcibios_map_platform_irq(struct pci_dev *pdev, u8 slot, u8 pin)

include/asm-sh/rts7751r2d.h

@@ -9,7 +9,7 @@
  * Renesas Technology Sales RTS7751R2D support
  */
 
-/* Box specific addresses.  */
+/* Board specific addresses.  */
 
 #define PA_BCR		0xa4000000	/* FPGA */
 #define PA_IRLMON	0xa4000002	/* Interrupt Status control */
@@ -20,19 +20,19 @@
 #define PA_RTCCE	0xa400000c	/* RTC(9701) Enable control */
 #define PA_PCICD	0xa400000e	/* PCI Extention detect control */
 #define PA_VOYAGERRTS	0xa4000020	/* VOYAGER Reset control */
-#if defined(CONFIG_RTS7751R2D_REV11)
-#define PA_AXRST	0xa4000022	/* AX_LAN Reset control */
-#define PA_CFRST	0xa4000024	/* CF Reset control */
-#define	PA_ADMRTS	0xa4000026	/* SD Reset control */
-#define PA_EXTRST	0xa4000028	/* Extention Reset control */
-#define PA_CFCDINTCLR	0xa400002a	/* CF Insert Interrupt clear */
-#else
-#define PA_CFRST	0xa4000022	/* CF Reset control */
-#define	PA_ADMRTS	0xa4000024	/* SD Reset control */
-#define PA_EXTRST	0xa4000026	/* Extention Reset control */
-#define PA_CFCDINTCLR	0xa4000028	/* CF Insert Interrupt clear */
-#define	PA_KEYCTLCLR	0xa400002a	/* Key Interrupt clear */
-#endif
+
+#define PA_R2D1_AXRST		0xa4000022	/* AX_LAN Reset control */
+#define PA_R2D1_CFRST		0xa4000024	/* CF Reset control */
+#define PA_R2D1_ADMRTS		0xa4000026	/* SD Reset control */
+#define PA_R2D1_EXTRST		0xa4000028	/* Extention Reset control */
+#define PA_R2D1_CFCDINTCLR	0xa400002a	/* CF Insert Interrupt clear */
+
+#define PA_R2DPLUS_CFRST	0xa4000022	/* CF Reset control */
+#define PA_R2DPLUS_ADMRTS	0xa4000024	/* SD Reset control */
+#define PA_R2DPLUS_EXTRST	0xa4000026	/* Extention Reset control */
+#define PA_R2DPLUS_CFCDINTCLR	0xa4000028	/* CF Insert Interrupt clear */
+#define PA_R2DPLUS_KEYCTLCLR	0xa400002a	/* Key Interrupt clear */
+
 #define PA_POWOFF	0xa4000030	/* Board Power OFF control */
 #define PA_VERREG	0xa4000032	/* FPGA Version Register */
 #define PA_INPORT	0xa4000034	/* KEY Input Port control */
@@ -46,27 +46,22 @@
 
 #define IRLCNTR1	(PA_BCR + 0)	/* Interrupt Control Register1 */
 
-#if defined(CONFIG_RTS7751R2D_REV11)
-#define IRQ_PCIETH	0		/* PCI Ethernet IRQ */
-#define IRQ_CFCARD	1		/* CF Card IRQ */
-#define IRQ_CFINST	2		/* CF Card Insert IRQ */
-#define IRQ_PCMCIA	3		/* PCMCIA IRQ */
-#define IRQ_VOYAGER	4		/* VOYAGER IRQ */
-#define IRQ_ONETH	5		/* On board Ethernet IRQ */
-#else
-#define IRQ_KEYIN	0		/* Key Input IRQ */
-#define IRQ_PCIETH	1		/* PCI Ethernet IRQ */
-#define IRQ_CFCARD	2		/* CF Card IRQ */
-#define IRQ_CFINST	3		/* CF Card Insert IRQ */
-#define IRQ_PCMCIA	4		/* PCMCIA IRQ */
-#define IRQ_VOYAGER	5		/* VOYAGER IRQ */
-#endif
-#define IRQ_RTCALM	6		/* RTC Alarm IRQ */
-#define IRQ_RTCTIME	7		/* RTC Timer IRQ */
-#define IRQ_SDCARD	8		/* SD Card IRQ */
-#define IRQ_PCISLOT1	9		/* PCI Slot #1 IRQ */
-#define IRQ_PCISLOT2	10		/* PCI Slot #2 IRQ */
-#define	IRQ_EXTENTION	11		/* EXTn IRQ */
+#define R2D_FPGA_IRQ_BASE	100
+
+#define IRQ_VOYAGER		(R2D_FPGA_IRQ_BASE + 0)
+#define IRQ_EXT			(R2D_FPGA_IRQ_BASE + 1)
+#define IRQ_TP			(R2D_FPGA_IRQ_BASE + 2)
+#define IRQ_RTC_T		(R2D_FPGA_IRQ_BASE + 3)
+#define IRQ_RTC_A		(R2D_FPGA_IRQ_BASE + 4)
+#define IRQ_SDCARD		(R2D_FPGA_IRQ_BASE + 5)
+#define IRQ_CF_CD		(R2D_FPGA_IRQ_BASE + 6)
+#define IRQ_CF_IDE		(R2D_FPGA_IRQ_BASE + 7)
+#define IRQ_AX88796		(R2D_FPGA_IRQ_BASE + 8)
+#define IRQ_KEY			(R2D_FPGA_IRQ_BASE + 9)
+#define IRQ_PCI_INTA		(R2D_FPGA_IRQ_BASE + 10)
+#define IRQ_PCI_INTB		(R2D_FPGA_IRQ_BASE + 11)
+#define IRQ_PCI_INTC		(R2D_FPGA_IRQ_BASE + 12)
+#define IRQ_PCI_INTD		(R2D_FPGA_IRQ_BASE + 13)
 
 /* arch/sh/boards/renesas/rts7751r2d/irq.c */
 void init_rts7751r2d_IRQ(void);