244 lines
6.2 KiB
C
244 lines
6.2 KiB
C
/*
|
|
* linux/arch/mips/tx4938/toshiba_rbtx4938/irq.c
|
|
*
|
|
* Toshiba RBTX4938 specific interrupt handlers
|
|
* Copyright (C) 2000-2001 Toshiba Corporation
|
|
*
|
|
* 2003-2005 (c) MontaVista Software, Inc. This file is licensed under the
|
|
* terms of the GNU General Public License version 2. This program is
|
|
* licensed "as is" without any warranty of any kind, whether express
|
|
* or implied.
|
|
*
|
|
* Support for TX4938 in 2.6 - Manish Lachwani (mlachwani@mvista.com)
|
|
*/
|
|
|
|
/*
|
|
IRQ Device
|
|
|
|
16 TX4938-CP0/00 Software 0
|
|
17 TX4938-CP0/01 Software 1
|
|
18 TX4938-CP0/02 Cascade TX4938-CP0
|
|
19 TX4938-CP0/03 Multiplexed -- do not use
|
|
20 TX4938-CP0/04 Multiplexed -- do not use
|
|
21 TX4938-CP0/05 Multiplexed -- do not use
|
|
22 TX4938-CP0/06 Multiplexed -- do not use
|
|
23 TX4938-CP0/07 CPU TIMER
|
|
|
|
24 TX4938-PIC/00
|
|
25 TX4938-PIC/01
|
|
26 TX4938-PIC/02 Cascade RBTX4938-IOC
|
|
27 TX4938-PIC/03 RBTX4938 RTL-8019AS Ethernet
|
|
28 TX4938-PIC/04
|
|
29 TX4938-PIC/05 TX4938 ETH1
|
|
30 TX4938-PIC/06 TX4938 ETH0
|
|
31 TX4938-PIC/07
|
|
32 TX4938-PIC/08 TX4938 SIO 0
|
|
33 TX4938-PIC/09 TX4938 SIO 1
|
|
34 TX4938-PIC/10 TX4938 DMA0
|
|
35 TX4938-PIC/11 TX4938 DMA1
|
|
36 TX4938-PIC/12 TX4938 DMA2
|
|
37 TX4938-PIC/13 TX4938 DMA3
|
|
38 TX4938-PIC/14
|
|
39 TX4938-PIC/15
|
|
40 TX4938-PIC/16 TX4938 PCIC
|
|
41 TX4938-PIC/17 TX4938 TMR0
|
|
42 TX4938-PIC/18 TX4938 TMR1
|
|
43 TX4938-PIC/19 TX4938 TMR2
|
|
44 TX4938-PIC/20
|
|
45 TX4938-PIC/21
|
|
46 TX4938-PIC/22 TX4938 PCIERR
|
|
47 TX4938-PIC/23
|
|
48 TX4938-PIC/24
|
|
49 TX4938-PIC/25
|
|
50 TX4938-PIC/26
|
|
51 TX4938-PIC/27
|
|
52 TX4938-PIC/28
|
|
53 TX4938-PIC/29
|
|
54 TX4938-PIC/30
|
|
55 TX4938-PIC/31 TX4938 SPI
|
|
|
|
56 RBTX4938-IOC/00 PCI-D
|
|
57 RBTX4938-IOC/01 PCI-C
|
|
58 RBTX4938-IOC/02 PCI-B
|
|
59 RBTX4938-IOC/03 PCI-A
|
|
60 RBTX4938-IOC/04 RTC
|
|
61 RBTX4938-IOC/05 ATA
|
|
62 RBTX4938-IOC/06 MODEM
|
|
63 RBTX4938-IOC/07 SWINT
|
|
*/
|
|
#include <linux/init.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/types.h>
|
|
#include <linux/mm.h>
|
|
#include <linux/swap.h>
|
|
#include <linux/ioport.h>
|
|
#include <linux/sched.h>
|
|
#include <linux/interrupt.h>
|
|
#include <linux/pci.h>
|
|
#include <linux/timex.h>
|
|
#include <asm/bootinfo.h>
|
|
#include <asm/page.h>
|
|
#include <asm/io.h>
|
|
#include <asm/irq.h>
|
|
#include <asm/processor.h>
|
|
#include <asm/ptrace.h>
|
|
#include <asm/reboot.h>
|
|
#include <asm/time.h>
|
|
#include <linux/bootmem.h>
|
|
#include <asm/tx4938/rbtx4938.h>
|
|
|
|
static unsigned int toshiba_rbtx4938_irq_ioc_startup(unsigned int irq);
|
|
static void toshiba_rbtx4938_irq_ioc_shutdown(unsigned int irq);
|
|
static void toshiba_rbtx4938_irq_ioc_enable(unsigned int irq);
|
|
static void toshiba_rbtx4938_irq_ioc_disable(unsigned int irq);
|
|
static void toshiba_rbtx4938_irq_ioc_mask_and_ack(unsigned int irq);
|
|
static void toshiba_rbtx4938_irq_ioc_end(unsigned int irq);
|
|
|
|
DEFINE_SPINLOCK(toshiba_rbtx4938_ioc_lock);
|
|
|
|
#define TOSHIBA_RBTX4938_IOC_NAME "RBTX4938-IOC"
|
|
static struct irq_chip toshiba_rbtx4938_irq_ioc_type = {
|
|
.typename = TOSHIBA_RBTX4938_IOC_NAME,
|
|
.startup = toshiba_rbtx4938_irq_ioc_startup,
|
|
.shutdown = toshiba_rbtx4938_irq_ioc_shutdown,
|
|
.enable = toshiba_rbtx4938_irq_ioc_enable,
|
|
.disable = toshiba_rbtx4938_irq_ioc_disable,
|
|
.ack = toshiba_rbtx4938_irq_ioc_mask_and_ack,
|
|
.end = toshiba_rbtx4938_irq_ioc_end,
|
|
.set_affinity = NULL
|
|
};
|
|
|
|
#define TOSHIBA_RBTX4938_IOC_INTR_ENAB 0xb7f02000
|
|
#define TOSHIBA_RBTX4938_IOC_INTR_STAT 0xb7f0200a
|
|
|
|
int
|
|
toshiba_rbtx4938_irq_nested(int sw_irq)
|
|
{
|
|
u8 level3;
|
|
|
|
level3 = reg_rd08(TOSHIBA_RBTX4938_IOC_INTR_STAT) & 0xff;
|
|
if (level3) {
|
|
/* must use fls so onboard ATA has priority */
|
|
sw_irq = TOSHIBA_RBTX4938_IRQ_IOC_BEG + fls(level3) - 1;
|
|
}
|
|
|
|
wbflush();
|
|
return sw_irq;
|
|
}
|
|
|
|
static struct irqaction toshiba_rbtx4938_irq_ioc_action = {
|
|
.handler = no_action,
|
|
.flags = 0,
|
|
.mask = CPU_MASK_NONE,
|
|
.name = TOSHIBA_RBTX4938_IOC_NAME,
|
|
};
|
|
|
|
/**********************************************************************************/
|
|
/* Functions for ioc */
|
|
/**********************************************************************************/
|
|
static void __init
|
|
toshiba_rbtx4938_irq_ioc_init(void)
|
|
{
|
|
int i;
|
|
|
|
for (i = TOSHIBA_RBTX4938_IRQ_IOC_BEG;
|
|
i <= TOSHIBA_RBTX4938_IRQ_IOC_END; i++) {
|
|
irq_desc[i].status = IRQ_DISABLED;
|
|
irq_desc[i].action = 0;
|
|
irq_desc[i].depth = 3;
|
|
irq_desc[i].chip = &toshiba_rbtx4938_irq_ioc_type;
|
|
}
|
|
|
|
setup_irq(RBTX4938_IRQ_IOCINT,
|
|
&toshiba_rbtx4938_irq_ioc_action);
|
|
}
|
|
|
|
static unsigned int
|
|
toshiba_rbtx4938_irq_ioc_startup(unsigned int irq)
|
|
{
|
|
toshiba_rbtx4938_irq_ioc_enable(irq);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void
|
|
toshiba_rbtx4938_irq_ioc_shutdown(unsigned int irq)
|
|
{
|
|
toshiba_rbtx4938_irq_ioc_disable(irq);
|
|
}
|
|
|
|
static void
|
|
toshiba_rbtx4938_irq_ioc_enable(unsigned int irq)
|
|
{
|
|
unsigned long flags;
|
|
volatile unsigned char v;
|
|
|
|
spin_lock_irqsave(&toshiba_rbtx4938_ioc_lock, flags);
|
|
|
|
v = TX4938_RD08(TOSHIBA_RBTX4938_IOC_INTR_ENAB);
|
|
v |= (1 << (irq - TOSHIBA_RBTX4938_IRQ_IOC_BEG));
|
|
TX4938_WR08(TOSHIBA_RBTX4938_IOC_INTR_ENAB, v);
|
|
mmiowb();
|
|
TX4938_RD08(TOSHIBA_RBTX4938_IOC_INTR_ENAB);
|
|
|
|
spin_unlock_irqrestore(&toshiba_rbtx4938_ioc_lock, flags);
|
|
}
|
|
|
|
static void
|
|
toshiba_rbtx4938_irq_ioc_disable(unsigned int irq)
|
|
{
|
|
unsigned long flags;
|
|
volatile unsigned char v;
|
|
|
|
spin_lock_irqsave(&toshiba_rbtx4938_ioc_lock, flags);
|
|
|
|
v = TX4938_RD08(TOSHIBA_RBTX4938_IOC_INTR_ENAB);
|
|
v &= ~(1 << (irq - TOSHIBA_RBTX4938_IRQ_IOC_BEG));
|
|
TX4938_WR08(TOSHIBA_RBTX4938_IOC_INTR_ENAB, v);
|
|
mmiowb();
|
|
TX4938_RD08(TOSHIBA_RBTX4938_IOC_INTR_ENAB);
|
|
|
|
spin_unlock_irqrestore(&toshiba_rbtx4938_ioc_lock, flags);
|
|
}
|
|
|
|
static void
|
|
toshiba_rbtx4938_irq_ioc_mask_and_ack(unsigned int irq)
|
|
{
|
|
toshiba_rbtx4938_irq_ioc_disable(irq);
|
|
}
|
|
|
|
static void
|
|
toshiba_rbtx4938_irq_ioc_end(unsigned int irq)
|
|
{
|
|
if (!(irq_desc[irq].status & (IRQ_DISABLED | IRQ_INPROGRESS))) {
|
|
toshiba_rbtx4938_irq_ioc_enable(irq);
|
|
}
|
|
}
|
|
|
|
extern void __init txx9_spi_irqinit(int irc_irq);
|
|
|
|
void __init arch_init_irq(void)
|
|
{
|
|
extern void tx4938_irq_init(void);
|
|
|
|
/* Now, interrupt control disabled, */
|
|
/* all IRC interrupts are masked, */
|
|
/* all IRC interrupt mode are Low Active. */
|
|
|
|
/* mask all IOC interrupts */
|
|
*rbtx4938_imask_ptr = 0;
|
|
|
|
/* clear SoftInt interrupts */
|
|
*rbtx4938_softint_ptr = 0;
|
|
tx4938_irq_init();
|
|
toshiba_rbtx4938_irq_ioc_init();
|
|
/* Onboard 10M Ether: High Active */
|
|
TX4938_WR(TX4938_MKA(TX4938_IRC_IRDM0), 0x00000040);
|
|
|
|
if (tx4938_ccfgptr->pcfg & TX4938_PCFG_SPI_SEL) {
|
|
txx9_spi_irqinit(RBTX4938_IRQ_IRC_SPI);
|
|
}
|
|
|
|
wbflush();
|
|
}
|