2 * linux/arch/mips/tx4938/toshiba_rbtx4938/irq.c
4 * Toshiba RBTX4938 specific interrupt handlers
5 * Copyright (C) 2000-2001 Toshiba Corporation
7 * 2003-2005 (c) MontaVista Software, Inc. This file is licensed under the
8 * terms of the GNU General Public License version 2. This program is
9 * licensed "as is" without any warranty of any kind, whether express
12 * Support for TX4938 in 2.6 - Manish Lachwani (mlachwani@mvista.com)
18 16 TX4938-CP0/00 Software 0
19 17 TX4938-CP0/01 Software 1
20 18 TX4938-CP0/02 Cascade TX4938-CP0
21 19 TX4938-CP0/03 Multiplexed -- do not use
22 20 TX4938-CP0/04 Multiplexed -- do not use
23 21 TX4938-CP0/05 Multiplexed -- do not use
24 22 TX4938-CP0/06 Multiplexed -- do not use
25 23 TX4938-CP0/07 CPU TIMER
29 26 TX4938-PIC/02 Cascade RBTX4938-IOC
30 27 TX4938-PIC/03 RBTX4938 RTL-8019AS Ethernet
32 29 TX4938-PIC/05 TX4938 ETH1
33 30 TX4938-PIC/06 TX4938 ETH0
35 32 TX4938-PIC/08 TX4938 SIO 0
36 33 TX4938-PIC/09 TX4938 SIO 1
37 34 TX4938-PIC/10 TX4938 DMA0
38 35 TX4938-PIC/11 TX4938 DMA1
39 36 TX4938-PIC/12 TX4938 DMA2
40 37 TX4938-PIC/13 TX4938 DMA3
43 40 TX4938-PIC/16 TX4938 PCIC
44 41 TX4938-PIC/17 TX4938 TMR0
45 42 TX4938-PIC/18 TX4938 TMR1
46 43 TX4938-PIC/19 TX4938 TMR2
49 46 TX4938-PIC/22 TX4938 PCIERR
58 55 TX4938-PIC/31 TX4938 SPI
60 56 RBTX4938-IOC/00 PCI-D
61 57 RBTX4938-IOC/01 PCI-C
62 58 RBTX4938-IOC/02 PCI-B
63 59 RBTX4938-IOC/03 PCI-A
64 60 RBTX4938-IOC/04 RTC
65 61 RBTX4938-IOC/05 ATA
66 62 RBTX4938-IOC/06 MODEM
67 63 RBTX4938-IOC/07 SWINT
69 #include <linux/init.h>
70 #include <linux/kernel.h>
71 #include <linux/types.h>
73 #include <linux/swap.h>
74 #include <linux/ioport.h>
75 #include <linux/sched.h>
76 #include <linux/interrupt.h>
77 #include <linux/pci.h>
78 #include <linux/timex.h>
79 #include <asm/bootinfo.h>
83 #include <asm/processor.h>
84 #include <asm/reboot.h>
86 #include <asm/wbflush.h>
87 #include <linux/bootmem.h>
88 #include <asm/tx4938/rbtx4938.h>
90 static void toshiba_rbtx4938_irq_ioc_enable(unsigned int irq);
91 static void toshiba_rbtx4938_irq_ioc_disable(unsigned int irq);
93 #define TOSHIBA_RBTX4938_IOC_NAME "RBTX4938-IOC"
94 static struct irq_chip toshiba_rbtx4938_irq_ioc_type = {
95 .typename = TOSHIBA_RBTX4938_IOC_NAME,
96 .ack = toshiba_rbtx4938_irq_ioc_disable,
97 .mask = toshiba_rbtx4938_irq_ioc_disable,
98 .mask_ack = toshiba_rbtx4938_irq_ioc_disable,
99 .unmask = toshiba_rbtx4938_irq_ioc_enable,
102 #define TOSHIBA_RBTX4938_IOC_INTR_ENAB 0xb7f02000
103 #define TOSHIBA_RBTX4938_IOC_INTR_STAT 0xb7f0200a
106 toshiba_rbtx4938_irq_nested(int sw_irq)
110 level3 = reg_rd08(TOSHIBA_RBTX4938_IOC_INTR_STAT) & 0xff;
112 /* must use fls so onboard ATA has priority */
113 sw_irq = TOSHIBA_RBTX4938_IRQ_IOC_BEG + fls(level3) - 1;
120 static struct irqaction toshiba_rbtx4938_irq_ioc_action = {
121 .handler = no_action,
123 .mask = CPU_MASK_NONE,
124 .name = TOSHIBA_RBTX4938_IOC_NAME,
127 /**********************************************************************************/
128 /* Functions for ioc */
129 /**********************************************************************************/
131 toshiba_rbtx4938_irq_ioc_init(void)
135 for (i = TOSHIBA_RBTX4938_IRQ_IOC_BEG;
136 i <= TOSHIBA_RBTX4938_IRQ_IOC_END; i++)
137 set_irq_chip_and_handler(i, &toshiba_rbtx4938_irq_ioc_type,
140 setup_irq(RBTX4938_IRQ_IOCINT,
141 &toshiba_rbtx4938_irq_ioc_action);
145 toshiba_rbtx4938_irq_ioc_enable(unsigned int irq)
147 volatile unsigned char v;
149 v = TX4938_RD08(TOSHIBA_RBTX4938_IOC_INTR_ENAB);
150 v |= (1 << (irq - TOSHIBA_RBTX4938_IRQ_IOC_BEG));
151 TX4938_WR08(TOSHIBA_RBTX4938_IOC_INTR_ENAB, v);
153 TX4938_RD08(TOSHIBA_RBTX4938_IOC_INTR_ENAB);
157 toshiba_rbtx4938_irq_ioc_disable(unsigned int irq)
159 volatile unsigned char v;
161 v = TX4938_RD08(TOSHIBA_RBTX4938_IOC_INTR_ENAB);
162 v &= ~(1 << (irq - TOSHIBA_RBTX4938_IRQ_IOC_BEG));
163 TX4938_WR08(TOSHIBA_RBTX4938_IOC_INTR_ENAB, v);
165 TX4938_RD08(TOSHIBA_RBTX4938_IOC_INTR_ENAB);
168 extern void __init txx9_spi_irqinit(int irc_irq);
170 void __init arch_init_irq(void)
172 extern void tx4938_irq_init(void);
174 /* Now, interrupt control disabled, */
175 /* all IRC interrupts are masked, */
176 /* all IRC interrupt mode are Low Active. */
178 /* mask all IOC interrupts */
179 *rbtx4938_imask_ptr = 0;
181 /* clear SoftInt interrupts */
182 *rbtx4938_softint_ptr = 0;
184 toshiba_rbtx4938_irq_ioc_init();
185 /* Onboard 10M Ether: High Active */
186 TX4938_WR(TX4938_MKA(TX4938_IRC_IRDM0), 0x00000040);
188 if (tx4938_ccfgptr->pcfg & TX4938_PCFG_SPI_SEL) {
189 txx9_spi_irqinit(RBTX4938_IRQ_IRC_SPI);