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Merge branch 'devel' into next
[linux-2.6.git] / arch / sh / boards / mach-microdev / irq.c
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
12 #include <linux/init.h>
13 #include <linux/irq.h>
14 #include <linux/interrupt.h>
15 #include <asm/system.h>
16 #include <asm/io.h>
17 #include <mach/microdev.h>
18
19 #define NUM_EXTERNAL_IRQS 16    /* IRL0 .. IRL15 */
20
21 static const struct {
22         unsigned char fpgaIrq;
23         unsigned char mapped;
24         const char *name;
25 } fpgaIrqTable[NUM_EXTERNAL_IRQS] = {
26         { 0,                            0,      "unused"   },           /* IRQ #0       IRL=15  0x200  */
27         { MICRODEV_FPGA_IRQ_KEYBOARD,   1,      "keyboard" },           /* IRQ #1       IRL=14  0x220  */
28         { MICRODEV_FPGA_IRQ_SERIAL1,    1,      "Serial #1"},           /* IRQ #2       IRL=13  0x240  */
29         { MICRODEV_FPGA_IRQ_ETHERNET,   1,      "Ethernet" },           /* IRQ #3       IRL=12  0x260  */
30         { MICRODEV_FPGA_IRQ_SERIAL2,    0,      "Serial #2"},           /* IRQ #4       IRL=11  0x280  */
31         { 0,                            0,      "unused"   },           /* IRQ #5       IRL=10  0x2a0  */
32         { 0,                            0,      "unused"   },           /* IRQ #6       IRL=9   0x2c0  */
33         { MICRODEV_FPGA_IRQ_USB_HC,     1,      "USB"      },           /* IRQ #7       IRL=8   0x2e0  */
34         { MICRODEV_IRQ_PCI_INTA,        1,      "PCI INTA" },           /* IRQ #8       IRL=7   0x300  */
35         { MICRODEV_IRQ_PCI_INTB,        1,      "PCI INTB" },           /* IRQ #9       IRL=6   0x320  */
36         { MICRODEV_IRQ_PCI_INTC,        1,      "PCI INTC" },           /* IRQ #10      IRL=5   0x340  */
37         { MICRODEV_IRQ_PCI_INTD,        1,      "PCI INTD" },           /* IRQ #11      IRL=4   0x360  */
38         { MICRODEV_FPGA_IRQ_MOUSE,      1,      "mouse"    },           /* IRQ #12      IRL=3   0x380  */
39         { MICRODEV_FPGA_IRQ_IDE2,       1,      "IDE #2"   },           /* IRQ #13      IRL=2   0x3a0  */
40         { MICRODEV_FPGA_IRQ_IDE1,       1,      "IDE #1"   },           /* IRQ #14      IRL=1   0x3c0  */
41         { 0,                            0,      "unused"   },           /* IRQ #15      IRL=0   0x3e0  */
42 };
43
44 #if (MICRODEV_LINUX_IRQ_KEYBOARD != 1)
45 #  error Inconsistancy in defining the IRQ# for Keyboard!
46 #endif
47
48 #if (MICRODEV_LINUX_IRQ_ETHERNET != 3)
49 #  error Inconsistancy in defining the IRQ# for Ethernet!
50 #endif
51
52 #if (MICRODEV_LINUX_IRQ_USB_HC != 7)
53 #  error Inconsistancy in defining the IRQ# for USB!
54 #endif
55
56 #if (MICRODEV_LINUX_IRQ_MOUSE != 12)
57 #  error Inconsistancy in defining the IRQ# for PS/2 Mouse!
58 #endif
59
60 #if (MICRODEV_LINUX_IRQ_IDE2 != 13)
61 #  error Inconsistancy in defining the IRQ# for secondary IDE!
62 #endif
63
64 #if (MICRODEV_LINUX_IRQ_IDE1 != 14)
65 #  error Inconsistancy in defining the IRQ# for primary IDE!
66 #endif
67
68 static void enable_microdev_irq(unsigned int irq);
69 static void disable_microdev_irq(unsigned int irq);
70 static void mask_and_ack_microdev(unsigned int);
71
72 static struct irq_chip microdev_irq_type = {
73         .name = "MicroDev-IRQ",
74         .unmask = enable_microdev_irq,
75         .mask = disable_microdev_irq,
76         .ack = mask_and_ack_microdev,
77 };
78
79 static void disable_microdev_irq(unsigned int irq)
80 {
81         unsigned int fpgaIrq;
82
83         if (irq >= NUM_EXTERNAL_IRQS)
84                 return;
85         if (!fpgaIrqTable[irq].mapped)
86                 return;
87
88         fpgaIrq = fpgaIrqTable[irq].fpgaIrq;
89
90         /* disable interrupts on the FPGA INTC register */
91         ctrl_outl(MICRODEV_FPGA_INTC_MASK(fpgaIrq), MICRODEV_FPGA_INTDSB_REG);
92 }
93
94 static void enable_microdev_irq(unsigned int irq)
95 {
96         unsigned long priorityReg, priorities, pri;
97         unsigned int fpgaIrq;
98
99         if (unlikely(irq >= NUM_EXTERNAL_IRQS))
100                 return;
101         if (unlikely(!fpgaIrqTable[irq].mapped))
102                 return;
103
104         pri = 15 - irq;
105
106         fpgaIrq = fpgaIrqTable[irq].fpgaIrq;
107         priorityReg = MICRODEV_FPGA_INTPRI_REG(fpgaIrq);
108
109         /* set priority for the interrupt */
110         priorities = ctrl_inl(priorityReg);
111         priorities &= ~MICRODEV_FPGA_INTPRI_MASK(fpgaIrq);
112         priorities |= MICRODEV_FPGA_INTPRI_LEVEL(fpgaIrq, pri);
113         ctrl_outl(priorities, priorityReg);
114
115         /* enable interrupts on the FPGA INTC register */
116         ctrl_outl(MICRODEV_FPGA_INTC_MASK(fpgaIrq), MICRODEV_FPGA_INTENB_REG);
117 }
118
119 /* This function sets the desired irq handler to be a MicroDev type */
120 static void __init make_microdev_irq(unsigned int irq)
121 {
122         disable_irq_nosync(irq);
123         set_irq_chip_and_handler(irq, &microdev_irq_type, handle_level_irq);
124         disable_microdev_irq(irq);
125 }
126
127 static void mask_and_ack_microdev(unsigned int irq)
128 {
129         disable_microdev_irq(irq);
130 }
131
132 extern void __init init_microdev_irq(void)
133 {
134         int i;
135
136         /* disable interrupts on the FPGA INTC register */
137         ctrl_outl(~0ul, MICRODEV_FPGA_INTDSB_REG);
138
139         for (i = 0; i < NUM_EXTERNAL_IRQS; i++)
140                 make_microdev_irq(i);
141 }
142
143 extern void microdev_print_fpga_intc_status(void)
144 {
145         volatile unsigned int * const intenb = (unsigned int*)MICRODEV_FPGA_INTENB_REG;
146         volatile unsigned int * const intdsb = (unsigned int*)MICRODEV_FPGA_INTDSB_REG;
147         volatile unsigned int * const intpria = (unsigned int*)MICRODEV_FPGA_INTPRI_REG(0);
148         volatile unsigned int * const intprib = (unsigned int*)MICRODEV_FPGA_INTPRI_REG(8);
149         volatile unsigned int * const intpric = (unsigned int*)MICRODEV_FPGA_INTPRI_REG(16);
150         volatile unsigned int * const intprid = (unsigned int*)MICRODEV_FPGA_INTPRI_REG(24);
151         volatile unsigned int * const intsrc = (unsigned int*)MICRODEV_FPGA_INTSRC_REG;
152         volatile unsigned int * const intreq = (unsigned int*)MICRODEV_FPGA_INTREQ_REG;
153
154         printk("-------------------------- microdev_print_fpga_intc_status() ------------------\n");
155         printk("FPGA_INTENB = 0x%08x\n", *intenb);
156         printk("FPGA_INTDSB = 0x%08x\n", *intdsb);
157         printk("FPGA_INTSRC = 0x%08x\n", *intsrc);
158         printk("FPGA_INTREQ = 0x%08x\n", *intreq);
159         printk("FPGA_INTPRI[3..0] = %08x:%08x:%08x:%08x\n", *intprid, *intpric, *intprib, *intpria);
160         printk("-------------------------------------------------------------------------------\n");
161 }