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1da177e4 LT |
1 | /* |
2 | * arch/sh/boards/superh/microdev/irq.c | |
3 | * | |
4 | * Copyright (C) 2003 Sean McGoogan (Sean.McGoogan@superh.com) | |
5 | * | |
6 | * SuperH SH4-202 MicroDev board support. | |
7 | * | |
8 | * May be copied or modified under the terms of the GNU General Public | |
9 | * License. See linux/COPYING for more information. | |
10 | */ | |
11 | ||
1da177e4 LT |
12 | #include <linux/init.h> |
13 | #include <linux/irq.h> | |
14 | ||
15 | #include <asm/system.h> | |
16 | #include <asm/io.h> | |
74017294 | 17 | #include <asm/microdev.h> |
1da177e4 LT |
18 | |
19 | #define NUM_EXTERNAL_IRQS 16 /* IRL0 .. IRL15 */ | |
20 | ||
21 | ||
22 | static const struct { | |
23 | unsigned char fpgaIrq; | |
24 | unsigned char mapped; | |
25 | const char *name; | |
26 | } fpgaIrqTable[NUM_EXTERNAL_IRQS] = { | |
27 | { 0, 0, "unused" }, /* IRQ #0 IRL=15 0x200 */ | |
28 | { MICRODEV_FPGA_IRQ_KEYBOARD, 1, "keyboard" }, /* IRQ #1 IRL=14 0x220 */ | |
29 | { MICRODEV_FPGA_IRQ_SERIAL1, 1, "Serial #1"}, /* IRQ #2 IRL=13 0x240 */ | |
30 | { MICRODEV_FPGA_IRQ_ETHERNET, 1, "Ethernet" }, /* IRQ #3 IRL=12 0x260 */ | |
31 | { MICRODEV_FPGA_IRQ_SERIAL2, 0, "Serial #2"}, /* IRQ #4 IRL=11 0x280 */ | |
32 | { 0, 0, "unused" }, /* IRQ #5 IRL=10 0x2a0 */ | |
33 | { 0, 0, "unused" }, /* IRQ #6 IRL=9 0x2c0 */ | |
34 | { MICRODEV_FPGA_IRQ_USB_HC, 1, "USB" }, /* IRQ #7 IRL=8 0x2e0 */ | |
35 | { MICRODEV_IRQ_PCI_INTA, 1, "PCI INTA" }, /* IRQ #8 IRL=7 0x300 */ | |
36 | { MICRODEV_IRQ_PCI_INTB, 1, "PCI INTB" }, /* IRQ #9 IRL=6 0x320 */ | |
37 | { MICRODEV_IRQ_PCI_INTC, 1, "PCI INTC" }, /* IRQ #10 IRL=5 0x340 */ | |
38 | { MICRODEV_IRQ_PCI_INTD, 1, "PCI INTD" }, /* IRQ #11 IRL=4 0x360 */ | |
39 | { MICRODEV_FPGA_IRQ_MOUSE, 1, "mouse" }, /* IRQ #12 IRL=3 0x380 */ | |
40 | { MICRODEV_FPGA_IRQ_IDE2, 1, "IDE #2" }, /* IRQ #13 IRL=2 0x3a0 */ | |
41 | { MICRODEV_FPGA_IRQ_IDE1, 1, "IDE #1" }, /* IRQ #14 IRL=1 0x3c0 */ | |
42 | { 0, 0, "unused" }, /* IRQ #15 IRL=0 0x3e0 */ | |
43 | }; | |
44 | ||
45 | #if (MICRODEV_LINUX_IRQ_KEYBOARD != 1) | |
46 | # error Inconsistancy in defining the IRQ# for Keyboard! | |
47 | #endif | |
48 | ||
49 | #if (MICRODEV_LINUX_IRQ_ETHERNET != 3) | |
50 | # error Inconsistancy in defining the IRQ# for Ethernet! | |
51 | #endif | |
52 | ||
53 | #if (MICRODEV_LINUX_IRQ_USB_HC != 7) | |
54 | # error Inconsistancy in defining the IRQ# for USB! | |
55 | #endif | |
56 | ||
57 | #if (MICRODEV_LINUX_IRQ_MOUSE != 12) | |
58 | # error Inconsistancy in defining the IRQ# for PS/2 Mouse! | |
59 | #endif | |
60 | ||
61 | #if (MICRODEV_LINUX_IRQ_IDE2 != 13) | |
62 | # error Inconsistancy in defining the IRQ# for secondary IDE! | |
63 | #endif | |
64 | ||
65 | #if (MICRODEV_LINUX_IRQ_IDE1 != 14) | |
66 | # error Inconsistancy in defining the IRQ# for primary IDE! | |
67 | #endif | |
68 | ||
69 | static void enable_microdev_irq(unsigned int irq); | |
70 | static void disable_microdev_irq(unsigned int irq); | |
71 | ||
72 | /* shutdown is same as "disable" */ | |
73 | #define shutdown_microdev_irq disable_microdev_irq | |
74 | ||
75 | static void mask_and_ack_microdev(unsigned int); | |
76 | static void end_microdev_irq(unsigned int irq); | |
77 | ||
78 | static unsigned int startup_microdev_irq(unsigned int irq) | |
79 | { | |
80 | enable_microdev_irq(irq); | |
81 | return 0; /* never anything pending */ | |
82 | } | |
83 | ||
84 | static struct hw_interrupt_type microdev_irq_type = { | |
08d0fd07 TG |
85 | .typename = "MicroDev-IRQ", |
86 | .startup = startup_microdev_irq, | |
87 | .shutdown = shutdown_microdev_irq, | |
88 | .enable = enable_microdev_irq, | |
89 | .disable = disable_microdev_irq, | |
90 | .ack = mask_and_ack_microdev, | |
91 | .end = end_microdev_irq | |
1da177e4 LT |
92 | }; |
93 | ||
94 | static void disable_microdev_irq(unsigned int irq) | |
95 | { | |
96 | unsigned int flags; | |
97 | unsigned int fpgaIrq; | |
98 | ||
99 | if (irq >= NUM_EXTERNAL_IRQS) return; | |
100 | if (!fpgaIrqTable[irq].mapped) return; | |
101 | ||
102 | fpgaIrq = fpgaIrqTable[irq].fpgaIrq; | |
103 | ||
104 | /* disable interrupts */ | |
105 | local_irq_save(flags); | |
106 | ||
107 | /* disable interupts on the FPGA INTC register */ | |
108 | ctrl_outl(MICRODEV_FPGA_INTC_MASK(fpgaIrq), MICRODEV_FPGA_INTDSB_REG); | |
109 | ||
110 | /* restore interrupts */ | |
111 | local_irq_restore(flags); | |
112 | } | |
113 | ||
114 | static void enable_microdev_irq(unsigned int irq) | |
115 | { | |
116 | unsigned long priorityReg, priorities, pri; | |
117 | unsigned int flags; | |
118 | unsigned int fpgaIrq; | |
119 | ||
120 | ||
121 | if (irq >= NUM_EXTERNAL_IRQS) return; | |
122 | if (!fpgaIrqTable[irq].mapped) return; | |
123 | ||
124 | pri = 15 - irq; | |
125 | ||
126 | fpgaIrq = fpgaIrqTable[irq].fpgaIrq; | |
127 | priorityReg = MICRODEV_FPGA_INTPRI_REG(fpgaIrq); | |
128 | ||
129 | /* disable interrupts */ | |
130 | local_irq_save(flags); | |
131 | ||
132 | /* set priority for the interrupt */ | |
133 | priorities = ctrl_inl(priorityReg); | |
134 | priorities &= ~MICRODEV_FPGA_INTPRI_MASK(fpgaIrq); | |
135 | priorities |= MICRODEV_FPGA_INTPRI_LEVEL(fpgaIrq, pri); | |
136 | ctrl_outl(priorities, priorityReg); | |
137 | ||
138 | /* enable interupts on the FPGA INTC register */ | |
139 | ctrl_outl(MICRODEV_FPGA_INTC_MASK(fpgaIrq), MICRODEV_FPGA_INTENB_REG); | |
140 | ||
141 | /* restore interrupts */ | |
142 | local_irq_restore(flags); | |
143 | } | |
144 | ||
145 | /* This functions sets the desired irq handler to be a MicroDev type */ | |
146 | static void __init make_microdev_irq(unsigned int irq) | |
147 | { | |
148 | disable_irq_nosync(irq); | |
d1bef4ed | 149 | irq_desc[irq].chip = µdev_irq_type; |
1da177e4 LT |
150 | disable_microdev_irq(irq); |
151 | } | |
152 | ||
153 | static void mask_and_ack_microdev(unsigned int irq) | |
154 | { | |
155 | disable_microdev_irq(irq); | |
156 | } | |
157 | ||
158 | static void end_microdev_irq(unsigned int irq) | |
159 | { | |
160 | if (!(irq_desc[irq].status & (IRQ_DISABLED|IRQ_INPROGRESS))) | |
161 | { | |
162 | enable_microdev_irq(irq); | |
163 | } | |
164 | } | |
165 | ||
166 | extern void __init init_microdev_irq(void) | |
167 | { | |
168 | int i; | |
169 | ||
170 | /* disable interupts on the FPGA INTC register */ | |
171 | ctrl_outl(~0ul, MICRODEV_FPGA_INTDSB_REG); | |
172 | ||
173 | for (i = 0; i < NUM_EXTERNAL_IRQS; i++) | |
174 | { | |
175 | make_microdev_irq(i); | |
176 | } | |
177 | } | |
178 | ||
179 | extern void microdev_print_fpga_intc_status(void) | |
180 | { | |
181 | volatile unsigned int * const intenb = (unsigned int*)MICRODEV_FPGA_INTENB_REG; | |
182 | volatile unsigned int * const intdsb = (unsigned int*)MICRODEV_FPGA_INTDSB_REG; | |
183 | volatile unsigned int * const intpria = (unsigned int*)MICRODEV_FPGA_INTPRI_REG(0); | |
184 | volatile unsigned int * const intprib = (unsigned int*)MICRODEV_FPGA_INTPRI_REG(8); | |
185 | volatile unsigned int * const intpric = (unsigned int*)MICRODEV_FPGA_INTPRI_REG(16); | |
186 | volatile unsigned int * const intprid = (unsigned int*)MICRODEV_FPGA_INTPRI_REG(24); | |
187 | volatile unsigned int * const intsrc = (unsigned int*)MICRODEV_FPGA_INTSRC_REG; | |
188 | volatile unsigned int * const intreq = (unsigned int*)MICRODEV_FPGA_INTREQ_REG; | |
189 | ||
190 | printk("-------------------------- microdev_print_fpga_intc_status() ------------------\n"); | |
191 | printk("FPGA_INTENB = 0x%08x\n", *intenb); | |
192 | printk("FPGA_INTDSB = 0x%08x\n", *intdsb); | |
193 | printk("FPGA_INTSRC = 0x%08x\n", *intsrc); | |
194 | printk("FPGA_INTREQ = 0x%08x\n", *intreq); | |
195 | printk("FPGA_INTPRI[3..0] = %08x:%08x:%08x:%08x\n", *intprid, *intpric, *intprib, *intpria); | |
196 | printk("-------------------------------------------------------------------------------\n"); | |
197 | } | |
198 | ||
199 |