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/ptrace.h>
85 #include <asm/reboot.h>
87 #include <linux/version.h>
88 #include <linux/bootmem.h>
89 #include <asm/tx4938/rbtx4938.h>
91 static unsigned int toshiba_rbtx4938_irq_ioc_startup(unsigned int irq);
92 static void toshiba_rbtx4938_irq_ioc_shutdown(unsigned int irq);
93 static void toshiba_rbtx4938_irq_ioc_enable(unsigned int irq);
94 static void toshiba_rbtx4938_irq_ioc_disable(unsigned int irq);
95 static void toshiba_rbtx4938_irq_ioc_mask_and_ack(unsigned int irq);
96 static void toshiba_rbtx4938_irq_ioc_end(unsigned int irq);
98 DEFINE_SPINLOCK(toshiba_rbtx4938_ioc_lock);
100 #define TOSHIBA_RBTX4938_IOC_NAME "RBTX4938-IOC"
101 static struct hw_interrupt_type toshiba_rbtx4938_irq_ioc_type = {
102 .typename = TOSHIBA_RBTX4938_IOC_NAME,
103 .startup = toshiba_rbtx4938_irq_ioc_startup,
104 .shutdown = toshiba_rbtx4938_irq_ioc_shutdown,
105 .enable = toshiba_rbtx4938_irq_ioc_enable,
106 .disable = toshiba_rbtx4938_irq_ioc_disable,
107 .ack = toshiba_rbtx4938_irq_ioc_mask_and_ack,
108 .end = toshiba_rbtx4938_irq_ioc_end,
112 #define TOSHIBA_RBTX4938_IOC_INTR_ENAB 0xb7f02000
113 #define TOSHIBA_RBTX4938_IOC_INTR_STAT 0xb7f0200a
116 toshiba_rbtx4938_irq_nested(int sw_irq)
120 level3 = reg_rd08(TOSHIBA_RBTX4938_IOC_INTR_STAT) & 0xff;
122 /* must use fls so onboard ATA has priority */
123 sw_irq = TOSHIBA_RBTX4938_IRQ_IOC_BEG + fls(level3) - 1;
130 static struct irqaction toshiba_rbtx4938_irq_ioc_action = {
131 .handler = no_action,
133 .mask = CPU_MASK_NONE,
134 .name = TOSHIBA_RBTX4938_IOC_NAME,
137 /**********************************************************************************/
138 /* Functions for ioc */
139 /**********************************************************************************/
141 toshiba_rbtx4938_irq_ioc_init(void)
145 for (i = TOSHIBA_RBTX4938_IRQ_IOC_BEG;
146 i <= TOSHIBA_RBTX4938_IRQ_IOC_END; i++) {
147 irq_desc[i].status = IRQ_DISABLED;
148 irq_desc[i].action = 0;
149 irq_desc[i].depth = 3;
150 irq_desc[i].handler = &toshiba_rbtx4938_irq_ioc_type;
153 setup_irq(RBTX4938_IRQ_IOCINT,
154 &toshiba_rbtx4938_irq_ioc_action);
158 toshiba_rbtx4938_irq_ioc_startup(unsigned int irq)
160 toshiba_rbtx4938_irq_ioc_enable(irq);
166 toshiba_rbtx4938_irq_ioc_shutdown(unsigned int irq)
168 toshiba_rbtx4938_irq_ioc_disable(irq);
172 toshiba_rbtx4938_irq_ioc_enable(unsigned int irq)
175 volatile unsigned char v;
177 spin_lock_irqsave(&toshiba_rbtx4938_ioc_lock, flags);
179 v = TX4938_RD08(TOSHIBA_RBTX4938_IOC_INTR_ENAB);
180 v |= (1 << (irq - TOSHIBA_RBTX4938_IRQ_IOC_BEG));
181 TX4938_WR08(TOSHIBA_RBTX4938_IOC_INTR_ENAB, v);
183 TX4938_RD08(TOSHIBA_RBTX4938_IOC_INTR_ENAB);
185 spin_unlock_irqrestore(&toshiba_rbtx4938_ioc_lock, flags);
189 toshiba_rbtx4938_irq_ioc_disable(unsigned int irq)
192 volatile unsigned char v;
194 spin_lock_irqsave(&toshiba_rbtx4938_ioc_lock, flags);
196 v = TX4938_RD08(TOSHIBA_RBTX4938_IOC_INTR_ENAB);
197 v &= ~(1 << (irq - TOSHIBA_RBTX4938_IRQ_IOC_BEG));
198 TX4938_WR08(TOSHIBA_RBTX4938_IOC_INTR_ENAB, v);
200 TX4938_RD08(TOSHIBA_RBTX4938_IOC_INTR_ENAB);
202 spin_unlock_irqrestore(&toshiba_rbtx4938_ioc_lock, flags);
206 toshiba_rbtx4938_irq_ioc_mask_and_ack(unsigned int irq)
208 toshiba_rbtx4938_irq_ioc_disable(irq);
212 toshiba_rbtx4938_irq_ioc_end(unsigned int irq)
214 if (!(irq_desc[irq].status & (IRQ_DISABLED | IRQ_INPROGRESS))) {
215 toshiba_rbtx4938_irq_ioc_enable(irq);
219 extern void __init txx9_spi_irqinit(int irc_irq);
221 void __init arch_init_irq(void)
223 extern void tx4938_irq_init(void);
225 /* Now, interrupt control disabled, */
226 /* all IRC interrupts are masked, */
227 /* all IRC interrupt mode are Low Active. */
229 /* mask all IOC interrupts */
230 *rbtx4938_imask_ptr = 0;
232 /* clear SoftInt interrupts */
233 *rbtx4938_softint_ptr = 0;
235 toshiba_rbtx4938_irq_ioc_init();
236 /* Onboard 10M Ether: High Active */
237 TX4938_WR(TX4938_MKA(TX4938_IRC_IRDM0), 0x00000040);
239 if (tx4938_ccfgptr->pcfg & TX4938_PCFG_SPI_SEL) {
240 txx9_spi_irqinit(RBTX4938_IRQ_IRC_SPI);