2 * Toshiba RBTX4938 specific interrupt handlers
3 * Copyright (C) 2000-2001 Toshiba Corporation
5 * 2003-2005 (c) MontaVista Software, Inc. This file is licensed under the
6 * terms of the GNU General Public License version 2. This program is
7 * licensed "as is" without any warranty of any kind, whether express
10 * Support for TX4938 in 2.6 - Manish Lachwani (mlachwani@mvista.com)
16 16 TX4938-CP0/00 Software 0
17 17 TX4938-CP0/01 Software 1
18 18 TX4938-CP0/02 Cascade TX4938-CP0
19 19 TX4938-CP0/03 Multiplexed -- do not use
20 20 TX4938-CP0/04 Multiplexed -- do not use
21 21 TX4938-CP0/05 Multiplexed -- do not use
22 22 TX4938-CP0/06 Multiplexed -- do not use
23 23 TX4938-CP0/07 CPU TIMER
27 26 TX4938-PIC/02 Cascade RBTX4938-IOC
28 27 TX4938-PIC/03 RBTX4938 RTL-8019AS Ethernet
30 29 TX4938-PIC/05 TX4938 ETH1
31 30 TX4938-PIC/06 TX4938 ETH0
33 32 TX4938-PIC/08 TX4938 SIO 0
34 33 TX4938-PIC/09 TX4938 SIO 1
35 34 TX4938-PIC/10 TX4938 DMA0
36 35 TX4938-PIC/11 TX4938 DMA1
37 36 TX4938-PIC/12 TX4938 DMA2
38 37 TX4938-PIC/13 TX4938 DMA3
41 40 TX4938-PIC/16 TX4938 PCIC
42 41 TX4938-PIC/17 TX4938 TMR0
43 42 TX4938-PIC/18 TX4938 TMR1
44 43 TX4938-PIC/19 TX4938 TMR2
47 46 TX4938-PIC/22 TX4938 PCIERR
56 55 TX4938-PIC/31 TX4938 SPI
58 56 RBTX4938-IOC/00 PCI-D
59 57 RBTX4938-IOC/01 PCI-C
60 58 RBTX4938-IOC/02 PCI-B
61 59 RBTX4938-IOC/03 PCI-A
62 60 RBTX4938-IOC/04 RTC
63 61 RBTX4938-IOC/05 ATA
64 62 RBTX4938-IOC/06 MODEM
65 63 RBTX4938-IOC/07 SWINT
67 #include <linux/init.h>
68 #include <linux/interrupt.h>
69 #include <asm/mipsregs.h>
70 #include <asm/txx9/generic.h>
71 #include <asm/txx9/rbtx4938.h>
73 static void toshiba_rbtx4938_irq_ioc_enable(unsigned int irq);
74 static void toshiba_rbtx4938_irq_ioc_disable(unsigned int irq);
76 #define TOSHIBA_RBTX4938_IOC_NAME "RBTX4938-IOC"
77 static struct irq_chip toshiba_rbtx4938_irq_ioc_type = {
78 .name = TOSHIBA_RBTX4938_IOC_NAME,
79 .ack = toshiba_rbtx4938_irq_ioc_disable,
80 .mask = toshiba_rbtx4938_irq_ioc_disable,
81 .mask_ack = toshiba_rbtx4938_irq_ioc_disable,
82 .unmask = toshiba_rbtx4938_irq_ioc_enable,
85 static int toshiba_rbtx4938_irq_nested(int sw_irq)
89 level3 = readb(rbtx4938_imstat_addr);
91 /* must use fls so onboard ATA has priority */
92 sw_irq = RBTX4938_IRQ_IOC + fls(level3) - 1;
96 /**********************************************************************************/
97 /* Functions for ioc */
98 /**********************************************************************************/
100 toshiba_rbtx4938_irq_ioc_init(void)
104 for (i = RBTX4938_IRQ_IOC;
105 i < RBTX4938_IRQ_IOC + RBTX4938_NR_IRQ_IOC; i++)
106 set_irq_chip_and_handler(i, &toshiba_rbtx4938_irq_ioc_type,
109 set_irq_chained_handler(RBTX4938_IRQ_IOCINT, handle_simple_irq);
113 toshiba_rbtx4938_irq_ioc_enable(unsigned int irq)
117 v = readb(rbtx4938_imask_addr);
118 v |= (1 << (irq - RBTX4938_IRQ_IOC));
119 writeb(v, rbtx4938_imask_addr);
124 toshiba_rbtx4938_irq_ioc_disable(unsigned int irq)
128 v = readb(rbtx4938_imask_addr);
129 v &= ~(1 << (irq - RBTX4938_IRQ_IOC));
130 writeb(v, rbtx4938_imask_addr);
134 static int rbtx4938_irq_dispatch(int pending)
138 if (pending & STATUSF_IP7)
139 irq = MIPS_CPU_IRQ_BASE + 7;
140 else if (pending & STATUSF_IP2) {
142 if (irq == RBTX4938_IRQ_IOCINT)
143 irq = toshiba_rbtx4938_irq_nested(irq);
144 } else if (pending & STATUSF_IP1)
145 irq = MIPS_CPU_IRQ_BASE + 0;
146 else if (pending & STATUSF_IP0)
147 irq = MIPS_CPU_IRQ_BASE + 1;
153 void __init rbtx4938_irq_setup(void)
155 txx9_irq_dispatch = rbtx4938_irq_dispatch;
156 /* Now, interrupt control disabled, */
157 /* all IRC interrupts are masked, */
158 /* all IRC interrupt mode are Low Active. */
160 /* mask all IOC interrupts */
161 writeb(0, rbtx4938_imask_addr);
163 /* clear SoftInt interrupts */
164 writeb(0, rbtx4938_softint_addr);
166 toshiba_rbtx4938_irq_ioc_init();
167 /* Onboard 10M Ether: High Active */
168 set_irq_type(RBTX4938_IRQ_ETHER, IRQF_TRIGGER_HIGH);