[MIPS] Cleanup TX39/TX49 irq code

Cleanup jmr3927, tx4927 and tx4938 irq codes, using common IRQ_CPU,
I8259 and IRQ_TXX9 irq routines.

Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

3 files changed, 11 insertions, 279 deletions

diff --git a/arch/mips/tx4938/common/irq.c b/arch/mips/tx4938/common/irq.c
index 3a2dbfc2501..c059b899d12 100644
--- a/arch/mips/tx4938/common/irq.c
+++ b/arch/mips/tx4938/common/irq.c
@@ -11,284 +11,21 @@
  *
  * Support for TX4938 in 2.6 - Manish Lachwani (mlachwani@mvista.com)
  */
-#include <linux/errno.h>
 #include <linux/init.h>
-#include <linux/kernel_stat.h>
-#include <linux/module.h>
-#include <linux/signal.h>
-#include <linux/sched.h>
-#include <linux/types.h>
 #include <linux/interrupt.h>
-#include <linux/ioport.h>
-#include <linux/timex.h>
-#include <linux/slab.h>
-#include <linux/random.h>
-#include <linux/irq.h>
-#include <asm/bitops.h>
-#include <asm/bootinfo.h>
-#include <asm/io.h>
-#include <asm/irq.h>
+#include <asm/irq_cpu.h>
 #include <asm/mipsregs.h>
-#include <asm/system.h>
-#include <asm/wbflush.h>
 #include <asm/tx4938/rbtx4938.h>
 
-/**********************************************************************************/
-/* Forwad definitions for all pic's                                               */
-/**********************************************************************************/
-
-static void tx4938_irq_cp0_enable(unsigned int irq);
-static void tx4938_irq_cp0_disable(unsigned int irq);
-
-static void tx4938_irq_pic_enable(unsigned int irq);
-static void tx4938_irq_pic_disable(unsigned int irq);
-
-/**********************************************************************************/
-/* Kernel structs for all pic's                                                   */
-/**********************************************************************************/
-
-#define TX4938_CP0_NAME "TX4938-CP0"
-static struct irq_chip tx4938_irq_cp0_type = {
-	.name = TX4938_CP0_NAME,
-	.ack = tx4938_irq_cp0_disable,
-	.mask = tx4938_irq_cp0_disable,
-	.mask_ack = tx4938_irq_cp0_disable,
-	.unmask = tx4938_irq_cp0_enable,
-};
-
-#define TX4938_PIC_NAME "TX4938-PIC"
-static struct irq_chip tx4938_irq_pic_type = {
-	.name = TX4938_PIC_NAME,
-	.ack = tx4938_irq_pic_disable,
-	.mask = tx4938_irq_pic_disable,
-	.mask_ack = tx4938_irq_pic_disable,
-	.unmask = tx4938_irq_pic_enable,
-};
-
-static struct irqaction tx4938_irq_pic_action = {
-	.handler = no_action,
-	.flags = 0,
-	.mask = CPU_MASK_NONE,
-	.name = TX4938_PIC_NAME
-};
-
-/**********************************************************************************/
-/* Functions for cp0                                                              */
-/**********************************************************************************/
-
-#define tx4938_irq_cp0_mask(irq) ( 1 << ( irq-TX4938_IRQ_CP0_BEG+8 ) )
-
-static void __init
-tx4938_irq_cp0_init(void)
-{
-	int i;
-
-	for (i = TX4938_IRQ_CP0_BEG; i <= TX4938_IRQ_CP0_END; i++)
-		set_irq_chip_and_handler(i, &tx4938_irq_cp0_type,
-					 handle_level_irq);
-}
-
-static void
-tx4938_irq_cp0_enable(unsigned int irq)
-{
-	set_c0_status(tx4938_irq_cp0_mask(irq));
-}
-
-static void
-tx4938_irq_cp0_disable(unsigned int irq)
-{
-	clear_c0_status(tx4938_irq_cp0_mask(irq));
-}
-
-/**********************************************************************************/
-/* Functions for pic                                                              */
-/**********************************************************************************/
-
-u32
-tx4938_irq_pic_addr(int irq)
-{
-	/* MVMCP -- need to formulize this */
-	irq -= TX4938_IRQ_PIC_BEG;
-
-	switch (irq) {
-	case 17:
-	case 16:
-	case 1:
-	case 0:{
-			return (TX4938_MKA(TX4938_IRC_IRLVL0));
-		}
-	case 19:
-	case 18:
-	case 3:
-	case 2:{
-			return (TX4938_MKA(TX4938_IRC_IRLVL1));
-		}
-	case 21:
-	case 20:
-	case 5:
-	case 4:{
-			return (TX4938_MKA(TX4938_IRC_IRLVL2));
-		}
-	case 23:
-	case 22:
-	case 7:
-	case 6:{
-			return (TX4938_MKA(TX4938_IRC_IRLVL3));
-		}
-	case 25:
-	case 24:
-	case 9:
-	case 8:{
-			return (TX4938_MKA(TX4938_IRC_IRLVL4));
-		}
-	case 27:
-	case 26:
-	case 11:
-	case 10:{
-			return (TX4938_MKA(TX4938_IRC_IRLVL5));
-		}
-	case 29:
-	case 28:
-	case 13:
-	case 12:{
-			return (TX4938_MKA(TX4938_IRC_IRLVL6));
-		}
-	case 31:
-	case 30:
-	case 15:
-	case 14:{
-			return (TX4938_MKA(TX4938_IRC_IRLVL7));
-		}
-	}
-
-	return 0;
-}
-
-u32
-tx4938_irq_pic_mask(int irq)
-{
-	/* MVMCP -- need to formulize this */
-	irq -= TX4938_IRQ_PIC_BEG;
-
-	switch (irq) {
-	case 31:
-	case 29:
-	case 27:
-	case 25:
-	case 23:
-	case 21:
-	case 19:
-	case 17:{
-			return (0x07000000);
-		}
-	case 30:
-	case 28:
-	case 26:
-	case 24:
-	case 22:
-	case 20:
-	case 18:
-	case 16:{
-			return (0x00070000);
-		}
-	case 15:
-	case 13:
-	case 11:
-	case 9:
-	case 7:
-	case 5:
-	case 3:
-	case 1:{
-			return (0x00000700);
-		}
-	case 14:
-	case 12:
-	case 10:
-	case 8:
-	case 6:
-	case 4:
-	case 2:
-	case 0:{
-			return (0x00000007);
-		}
-	}
-	return 0x00000000;
-}
-
-static void
-tx4938_irq_pic_modify(unsigned pic_reg, unsigned clr_bits, unsigned set_bits)
-{
-	unsigned long val = 0;
-
-	val = TX4938_RD(pic_reg);
-	val &= (~clr_bits);
-	val |= (set_bits);
-	TX4938_WR(pic_reg, val);
-	mmiowb();
-	TX4938_RD(pic_reg);
-}
-
-static void __init
-tx4938_irq_pic_init(void)
-{
-	int i;
-
-	for (i = TX4938_IRQ_PIC_BEG; i <= TX4938_IRQ_PIC_END; i++)
-		set_irq_chip_and_handler(i, &tx4938_irq_pic_type,
-					 handle_level_irq);
-
-	setup_irq(TX4938_IRQ_NEST_PIC_ON_CP0, &tx4938_irq_pic_action);
-
-	TX4938_WR(0xff1ff640, 0x6);	/* irq level mask -- only accept hightest */
-	TX4938_WR(0xff1ff600, TX4938_RD(0xff1ff600) | 0x1);	/* irq enable */
-}
-
-static void
-tx4938_irq_pic_enable(unsigned int irq)
-{
-	tx4938_irq_pic_modify(tx4938_irq_pic_addr(irq), 0,
-			      tx4938_irq_pic_mask(irq));
-}
-
-static void
-tx4938_irq_pic_disable(unsigned int irq)
-{
-	tx4938_irq_pic_modify(tx4938_irq_pic_addr(irq),
-			      tx4938_irq_pic_mask(irq), 0);
-}
-
-/**********************************************************************************/
-/* Main init functions                                                            */
-/**********************************************************************************/
-
 void __init
 tx4938_irq_init(void)
 {
-	tx4938_irq_cp0_init();
-	tx4938_irq_pic_init();
+	mips_cpu_irq_init();
+	txx9_irq_init(TX4938_IRC_REG);
+	set_irq_chained_handler(TX4938_IRQ_NEST_PIC_ON_CP0, handle_simple_irq);
 }
 
-int
-tx4938_irq_nested(void)
-{
-	int sw_irq = 0;
-	u32 level2;
-
-	level2 = TX4938_RD(0xff1ff6a0);
-	if ((level2 & 0x10000) == 0) {
-		level2 &= 0x1f;
-		sw_irq = TX4938_IRQ_PIC_BEG + level2;
-		if (sw_irq == 26) {
-			{
-				extern int toshiba_rbtx4938_irq_nested(int sw_irq);
-				sw_irq = toshiba_rbtx4938_irq_nested(sw_irq);
-			}
-		}
-	}
-
-	wbflush();
-	return sw_irq;
-}
+int toshiba_rbtx4938_irq_nested(int irq);
 
 asmlinkage void plat_irq_dispatch(void)
 {
@@ -297,8 +34,10 @@ asmlinkage void plat_irq_dispatch(void)
 	if (pending & STATUSF_IP7)
 		do_IRQ(TX4938_IRQ_CPU_TIMER);
 	else if (pending & STATUSF_IP2) {
-		int irq = tx4938_irq_nested();
-		if (irq)
+		int irq = txx9_irq();
+		if (irq == TX4938_IRQ_PIC_BEG + TX4938_IR_INT(0))
+			irq = toshiba_rbtx4938_irq_nested(irq);
+		if (irq >= 0)
 			do_IRQ(irq);
 		else
 			spurious_interrupt();
diff --git a/arch/mips/tx4938/toshiba_rbtx4938/irq.c b/arch/mips/tx4938/toshiba_rbtx4938/irq.c
index 91aea7aff51..f00185017e8 100644
--- a/arch/mips/tx4938/toshiba_rbtx4938/irq.c
+++ b/arch/mips/tx4938/toshiba_rbtx4938/irq.c
@@ -181,7 +181,7 @@ void __init arch_init_irq(void)
 	tx4938_irq_init();
 	toshiba_rbtx4938_irq_ioc_init();
 	/* Onboard 10M Ether: High Active */
-	TX4938_WR(TX4938_MKA(TX4938_IRC_IRDM0), 0x00000040);
+	set_irq_type(RBTX4938_IRQ_ETHER, IRQF_TRIGGER_HIGH);
 
 	wbflush();
 }
diff --git a/arch/mips/tx4938/toshiba_rbtx4938/setup.c b/arch/mips/tx4938/toshiba_rbtx4938/setup.c
index f9ad482749e..57f3c705d08 100644
--- a/arch/mips/tx4938/toshiba_rbtx4938/setup.c
+++ b/arch/mips/tx4938/toshiba_rbtx4938/setup.c
@@ -773,10 +773,6 @@ void __init tx4938_board_setup(void)
 		 txboard_add_phys_region(base, size);
 	}
 
-	/* IRC */
-	/* disable interrupt control */
-	tx4938_ircptr->cer = 0;
-
 	/* TMR */
 	/* disable all timers */
 	for (i = 0; i < TX4938_NR_TMR; i++) {
@@ -875,9 +871,6 @@ void __init toshiba_rbtx4938_setup(void)
 	if (txx9_master_clock == 0)
 		txx9_master_clock = 25000000; /* 25MHz */
 	tx4938_board_setup();
-	/* setup irq stuff */
-	TX4938_WR(TX4938_MKA(TX4938_IRC_IRDM0), 0x00000000);	/* irq trigger */
-	TX4938_WR(TX4938_MKA(TX4938_IRC_IRDM1), 0x00000000);	/* irq trigger */
 	/* setup serial stuff */
 	TX4938_WR(0xff1ff314, 0x00000000);	/* h/w flow control off */
 	TX4938_WR(0xff1ff414, 0x00000000);	/* h/w flow control off */
@@ -897,7 +890,7 @@ void __init toshiba_rbtx4938_setup(void)
 			req.iotype = UPIO_MEM;
 			req.membase = (char *)(0xff1ff300 + i * 0x100);
 			req.mapbase = 0xff1ff300 + i * 0x100;
-			req.irq = 32 + i;
+			req.irq = RBTX4938_IRQ_IRC_SIO(i);
 			req.flags |= UPF_BUGGY_UART /*HAVE_CTS_LINE*/;
 			req.uartclk = 50000000;
 			early_serial_txx9_setup(&req);