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1da177e4 | 1 | /* |
1da177e4 LT |
2 | * Toshiba RBTX4927 specific interrupt handlers |
3 | * | |
4 | * Author: MontaVista Software, Inc. | |
70342287 | 5 | * source@mvista.com |
1da177e4 LT |
6 | * |
7 | * Copyright 2001-2002 MontaVista Software Inc. | |
8 | * | |
9 | * This program is free software; you can redistribute it and/or modify it | |
10 | * under the terms of the GNU General Public License as published by the | |
11 | * Free Software Foundation; either version 2 of the License, or (at your | |
12 | * option) any later version. | |
13 | * | |
14 | * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED | |
15 | * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF | |
16 | * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. | |
17 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, | |
18 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, | |
19 | * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS | |
20 | * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND | |
21 | * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR | |
22 | * TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE | |
23 | * USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
24 | * | |
25 | * You should have received a copy of the GNU General Public License along | |
26 | * with this program; if not, write to the Free Software Foundation, Inc., | |
27 | * 675 Mass Ave, Cambridge, MA 02139, USA. | |
28 | */ | |
1da177e4 | 29 | /* |
bb72f1f7 AN |
30 | * I8259A_IRQ_BASE+00 |
31 | * I8259A_IRQ_BASE+01 PS2/Keyboard | |
32 | * I8259A_IRQ_BASE+02 Cascade RBTX4927-ISA (irqs 8-15) | |
33 | * I8259A_IRQ_BASE+03 | |
34 | * I8259A_IRQ_BASE+04 | |
35 | * I8259A_IRQ_BASE+05 | |
36 | * I8259A_IRQ_BASE+06 | |
37 | * I8259A_IRQ_BASE+07 | |
38 | * I8259A_IRQ_BASE+08 | |
39 | * I8259A_IRQ_BASE+09 | |
40 | * I8259A_IRQ_BASE+10 | |
41 | * I8259A_IRQ_BASE+11 | |
42 | * I8259A_IRQ_BASE+12 PS2/Mouse (not supported at this time) | |
43 | * I8259A_IRQ_BASE+13 | |
44 | * I8259A_IRQ_BASE+14 IDE | |
45 | * I8259A_IRQ_BASE+15 | |
46 | * | |
47 | * MIPS_CPU_IRQ_BASE+00 Software 0 | |
48 | * MIPS_CPU_IRQ_BASE+01 Software 1 | |
49 | * MIPS_CPU_IRQ_BASE+02 Cascade TX4927-CP0 | |
50 | * MIPS_CPU_IRQ_BASE+03 Multiplexed -- do not use | |
51 | * MIPS_CPU_IRQ_BASE+04 Multiplexed -- do not use | |
52 | * MIPS_CPU_IRQ_BASE+05 Multiplexed -- do not use | |
53 | * MIPS_CPU_IRQ_BASE+06 Multiplexed -- do not use | |
54 | * MIPS_CPU_IRQ_BASE+07 CPU TIMER | |
55 | * | |
56 | * TXX9_IRQ_BASE+00 | |
57 | * TXX9_IRQ_BASE+01 | |
58 | * TXX9_IRQ_BASE+02 | |
59 | * TXX9_IRQ_BASE+03 Cascade RBTX4927-IOC | |
60 | * TXX9_IRQ_BASE+04 | |
61 | * TXX9_IRQ_BASE+05 RBTX4927 RTL-8019AS ethernet | |
62 | * TXX9_IRQ_BASE+06 | |
63 | * TXX9_IRQ_BASE+07 | |
64 | * TXX9_IRQ_BASE+08 TX4927 SerialIO Channel 0 | |
65 | * TXX9_IRQ_BASE+09 TX4927 SerialIO Channel 1 | |
66 | * TXX9_IRQ_BASE+10 | |
67 | * TXX9_IRQ_BASE+11 | |
68 | * TXX9_IRQ_BASE+12 | |
69 | * TXX9_IRQ_BASE+13 | |
70 | * TXX9_IRQ_BASE+14 | |
71 | * TXX9_IRQ_BASE+15 | |
72 | * TXX9_IRQ_BASE+16 TX4927 PCI PCI-C | |
73 | * TXX9_IRQ_BASE+17 | |
74 | * TXX9_IRQ_BASE+18 | |
75 | * TXX9_IRQ_BASE+19 | |
76 | * TXX9_IRQ_BASE+20 | |
77 | * TXX9_IRQ_BASE+21 | |
78 | * TXX9_IRQ_BASE+22 TX4927 PCI PCI-ERR | |
79 | * TXX9_IRQ_BASE+23 TX4927 PCI PCI-PMA (not used) | |
80 | * TXX9_IRQ_BASE+24 | |
81 | * TXX9_IRQ_BASE+25 | |
82 | * TXX9_IRQ_BASE+26 | |
83 | * TXX9_IRQ_BASE+27 | |
84 | * TXX9_IRQ_BASE+28 | |
85 | * TXX9_IRQ_BASE+29 | |
86 | * TXX9_IRQ_BASE+30 | |
87 | * TXX9_IRQ_BASE+31 | |
88 | * | |
89 | * RBTX4927_IRQ_IOC+00 FPCIB0 PCI-D (SouthBridge) | |
90 | * RBTX4927_IRQ_IOC+01 FPCIB0 PCI-C (SouthBridge) | |
91 | * RBTX4927_IRQ_IOC+02 FPCIB0 PCI-B (SouthBridge/IDE/pin=1,INTR) | |
92 | * RBTX4927_IRQ_IOC+03 FPCIB0 PCI-A (SouthBridge/USB/pin=4) | |
93 | * RBTX4927_IRQ_IOC+04 | |
94 | * RBTX4927_IRQ_IOC+05 | |
95 | * RBTX4927_IRQ_IOC+06 | |
96 | * RBTX4927_IRQ_IOC+07 | |
97 | * | |
98 | * NOTES: | |
99 | * SouthBridge/INTR is mapped to SouthBridge/A=PCI-B/#58 | |
100 | * SouthBridge/ISA/pin=0 no pci irq used by this device | |
101 | * SouthBridge/IDE/pin=1 no pci irq used by this device, using INTR | |
102 | * via ISA IRQ14 | |
103 | * SouthBridge/USB/pin=4 using pci irq SouthBridge/D=PCI-A=#59 | |
104 | * SouthBridge/PMC/pin=0 no pci irq used by this device | |
105 | * SuperIO/PS2/Keyboard, using INTR via ISA IRQ1 | |
106 | * SuperIO/PS2/Mouse, using INTR via ISA IRQ12 (mouse not currently supported) | |
107 | * JP7 is not bus master -- do NOT use -- only 4 pci bus master's | |
108 | * allowed -- SouthBridge, JP4, JP5, JP6 | |
109 | */ | |
1da177e4 | 110 | |
1da177e4 | 111 | #include <linux/init.h> |
1da177e4 | 112 | #include <linux/types.h> |
1da177e4 | 113 | #include <linux/interrupt.h> |
ca4d3e67 | 114 | #include <linux/irq.h> |
1da177e4 | 115 | #include <asm/io.h> |
edcaf1a6 AN |
116 | #include <asm/mipsregs.h> |
117 | #include <asm/txx9/generic.h> | |
22b1d707 | 118 | #include <asm/txx9/rbtx4927.h> |
1da177e4 | 119 | |
edcaf1a6 | 120 | static int toshiba_rbtx4927_irq_nested(int sw_irq) |
1da177e4 | 121 | { |
b29eee49 | 122 | u8 level3; |
1da177e4 | 123 | |
94a4c329 | 124 | level3 = readb(rbtx4927_imstat_addr) & 0x1f; |
21e77df2 AN |
125 | if (unlikely(!level3)) |
126 | return -1; | |
127 | return RBTX4927_IRQ_IOC + __fls8(level3); | |
1da177e4 LT |
128 | } |
129 | ||
d7ae7c71 | 130 | static void toshiba_rbtx4927_irq_ioc_enable(struct irq_data *d) |
1da177e4 | 131 | { |
b29eee49 | 132 | unsigned char v; |
1da177e4 | 133 | |
94a4c329 | 134 | v = readb(rbtx4927_imask_addr); |
d7ae7c71 | 135 | v |= (1 << (d->irq - RBTX4927_IRQ_IOC)); |
94a4c329 | 136 | writeb(v, rbtx4927_imask_addr); |
1da177e4 LT |
137 | } |
138 | ||
d7ae7c71 | 139 | static void toshiba_rbtx4927_irq_ioc_disable(struct irq_data *d) |
1da177e4 | 140 | { |
b29eee49 | 141 | unsigned char v; |
1da177e4 | 142 | |
94a4c329 | 143 | v = readb(rbtx4927_imask_addr); |
d7ae7c71 | 144 | v &= ~(1 << (d->irq - RBTX4927_IRQ_IOC)); |
94a4c329 | 145 | writeb(v, rbtx4927_imask_addr); |
a02eb8da | 146 | mmiowb(); |
1da177e4 LT |
147 | } |
148 | ||
d7ae7c71 TG |
149 | #define TOSHIBA_RBTX4927_IOC_NAME "RBTX4927-IOC" |
150 | static struct irq_chip toshiba_rbtx4927_irq_ioc_type = { | |
151 | .name = TOSHIBA_RBTX4927_IOC_NAME, | |
152 | .irq_mask = toshiba_rbtx4927_irq_ioc_disable, | |
153 | .irq_unmask = toshiba_rbtx4927_irq_ioc_enable, | |
154 | }; | |
155 | ||
156 | static void __init toshiba_rbtx4927_irq_ioc_init(void) | |
157 | { | |
158 | int i; | |
159 | ||
160 | /* mask all IOC interrupts */ | |
161 | writeb(0, rbtx4927_imask_addr); | |
162 | /* clear SoftInt interrupts */ | |
163 | writeb(0, rbtx4927_softint_addr); | |
164 | ||
165 | for (i = RBTX4927_IRQ_IOC; | |
166 | i < RBTX4927_IRQ_IOC + RBTX4927_NR_IRQ_IOC; i++) | |
e4ec7989 | 167 | irq_set_chip_and_handler(i, &toshiba_rbtx4927_irq_ioc_type, |
d7ae7c71 | 168 | handle_level_irq); |
e4ec7989 | 169 | irq_set_chained_handler(RBTX4927_IRQ_IOCINT, handle_simple_irq); |
d7ae7c71 | 170 | } |
edcaf1a6 AN |
171 | |
172 | static int rbtx4927_irq_dispatch(int pending) | |
1da177e4 | 173 | { |
edcaf1a6 AN |
174 | int irq; |
175 | ||
176 | if (pending & STATUSF_IP7) /* cpu timer */ | |
177 | irq = MIPS_CPU_IRQ_BASE + 7; | |
178 | else if (pending & STATUSF_IP2) { /* tx4927 pic */ | |
179 | irq = txx9_irq(); | |
180 | if (irq == RBTX4927_IRQ_IOCINT) | |
181 | irq = toshiba_rbtx4927_irq_nested(irq); | |
182 | } else if (pending & STATUSF_IP0) /* user line 0 */ | |
183 | irq = MIPS_CPU_IRQ_BASE + 0; | |
184 | else if (pending & STATUSF_IP1) /* user line 1 */ | |
185 | irq = MIPS_CPU_IRQ_BASE + 1; | |
186 | else | |
187 | irq = -1; | |
188 | return irq; | |
189 | } | |
1da177e4 | 190 | |
edcaf1a6 AN |
191 | void __init rbtx4927_irq_setup(void) |
192 | { | |
193 | txx9_irq_dispatch = rbtx4927_irq_dispatch; | |
1da177e4 LT |
194 | tx4927_irq_init(); |
195 | toshiba_rbtx4927_irq_ioc_init(); | |
c87abd75 | 196 | /* Onboard 10M Ether: High Active */ |
e4ec7989 | 197 | irq_set_irq_type(RBTX4927_RTL_8019_IRQ, IRQF_TRIGGER_HIGH); |
1da177e4 | 198 | } |