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368dd5ac AT |
1 | /* ASB2364 initialisation |
2 | * | |
3 | * Copyright (C) 2002 Red Hat, Inc. All Rights Reserved. | |
4 | * Written by David Howells (dhowells@redhat.com) | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or | |
7 | * modify it under the terms of the GNU General Public License | |
8 | * as published by the Free Software Foundation; either version | |
9 | * 2 of the License, or (at your option) any later version. | |
10 | */ | |
11 | ||
12 | #include <linux/kernel.h> | |
13 | #include <linux/param.h> | |
14 | #include <linux/init.h> | |
15 | #include <linux/device.h> | |
16 | #include <linux/delay.h> | |
17 | ||
18 | #include <asm/io.h> | |
19 | #include <asm/setup.h> | |
20 | #include <asm/processor.h> | |
21 | #include <asm/irq.h> | |
22 | #include <asm/intctl-regs.h> | |
ddb7d1e9 | 23 | #include <asm/serial-regs.h> |
6044cf1d | 24 | #include <unit/fpga-regs.h> |
ddb7d1e9 DH |
25 | #include <unit/serial.h> |
26 | #include <unit/smsc911x.h> | |
27 | ||
28 | #define TTYS0_SERIAL_IER __SYSREG(SERIAL_PORT0_BASE_ADDRESS + UART_IER * 2, u8) | |
29 | #define LAN_IRQ_CFG __SYSREG(SMSC911X_BASE + 0x54, u32) | |
30 | #define LAN_INT_EN __SYSREG(SMSC911X_BASE + 0x5c, u32) | |
368dd5ac AT |
31 | |
32 | /* | |
33 | * initialise some of the unit hardware before gdbstub is set up | |
34 | */ | |
35 | asmlinkage void __init unit_init(void) | |
36 | { | |
ddb7d1e9 DH |
37 | /* Make sure we aren't going to get unexpected interrupts */ |
38 | TTYS0_SERIAL_IER = 0; | |
39 | SC0RXICR = 0; | |
40 | SC0TXICR = 0; | |
41 | SC1RXICR = 0; | |
42 | SC1TXICR = 0; | |
43 | SC2RXICR = 0; | |
44 | SC2TXICR = 0; | |
45 | ||
46 | /* Attempt to reset the FPGA attached peripherals */ | |
47 | ASB2364_FPGA_REG_RESET_LAN = 0x0000; | |
48 | SyncExBus(); | |
49 | ASB2364_FPGA_REG_RESET_UART = 0x0000; | |
50 | SyncExBus(); | |
51 | ASB2364_FPGA_REG_RESET_I2C = 0x0000; | |
52 | SyncExBus(); | |
53 | ASB2364_FPGA_REG_RESET_USB = 0x0000; | |
54 | SyncExBus(); | |
55 | ASB2364_FPGA_REG_RESET_AV = 0x0000; | |
56 | SyncExBus(); | |
57 | ||
368dd5ac AT |
58 | /* set up the external interrupts */ |
59 | ||
60 | /* XIRQ[0]: NAND RXBY */ | |
61 | /* SET_XIRQ_TRIGGER(0, XIRQ_TRIGGER_LOWLEVEL); */ | |
62 | ||
63 | /* XIRQ[1]: LAN, UART, I2C, USB, PCI, FPGA */ | |
64 | SET_XIRQ_TRIGGER(1, XIRQ_TRIGGER_LOWLEVEL); | |
65 | ||
66 | /* XIRQ[2]: Extend Slot 1-9 */ | |
67 | /* SET_XIRQ_TRIGGER(2, XIRQ_TRIGGER_LOWLEVEL); */ | |
68 | ||
69 | #if defined(CONFIG_EXT_SERIAL_IRQ_LEVEL) && \ | |
70 | defined(CONFIG_ETHERNET_IRQ_LEVEL) && \ | |
71 | (CONFIG_EXT_SERIAL_IRQ_LEVEL != CONFIG_ETHERNET_IRQ_LEVEL) | |
72 | # error CONFIG_EXT_SERIAL_IRQ_LEVEL != CONFIG_ETHERNET_IRQ_LEVEL | |
73 | #endif | |
74 | ||
75 | #if defined(CONFIG_EXT_SERIAL_IRQ_LEVEL) | |
76 | set_intr_level(XIRQ1, NUM2GxICR_LEVEL(CONFIG_EXT_SERIAL_IRQ_LEVEL)); | |
77 | #elif defined(CONFIG_ETHERNET_IRQ_LEVEL) | |
78 | set_intr_level(XIRQ1, NUM2GxICR_LEVEL(CONFIG_ETHERNET_IRQ_LEVEL)); | |
79 | #endif | |
80 | } | |
81 | ||
82 | /* | |
83 | * initialise the rest of the unit hardware after gdbstub is ready | |
84 | */ | |
85 | asmlinkage void __init unit_setup(void) | |
86 | { | |
ddb7d1e9 DH |
87 | /* Release the reset on the SMSC911X so that it is ready by the time we |
88 | * need it */ | |
89 | ASB2364_FPGA_REG_RESET_LAN = 0x0001; | |
90 | SyncExBus(); | |
91 | ASB2364_FPGA_REG_RESET_UART = 0x0001; | |
92 | SyncExBus(); | |
93 | ASB2364_FPGA_REG_RESET_I2C = 0x0001; | |
94 | SyncExBus(); | |
95 | ASB2364_FPGA_REG_RESET_USB = 0x0001; | |
96 | SyncExBus(); | |
97 | ASB2364_FPGA_REG_RESET_AV = 0x0001; | |
98 | SyncExBus(); | |
368dd5ac | 99 | |
ddb7d1e9 DH |
100 | /* Make sure the ethernet chipset isn't going to give us an interrupt |
101 | * storm from stuff it was doing pre-reset */ | |
102 | LAN_IRQ_CFG = 0; | |
103 | LAN_INT_EN = 0; | |
368dd5ac AT |
104 | } |
105 | ||
106 | /* | |
107 | * initialise the external interrupts used by a unit of this type | |
108 | */ | |
109 | void __init unit_init_IRQ(void) | |
110 | { | |
111 | unsigned int extnum; | |
112 | ||
113 | for (extnum = 0 ; extnum < NR_XIRQS ; extnum++) { | |
114 | switch (GET_XIRQ_TRIGGER(extnum)) { | |
115 | /* LEVEL triggered interrupts should be made | |
116 | * post-ACK'able as they hold their lines until | |
117 | * serviced | |
118 | */ | |
119 | case XIRQ_TRIGGER_HILEVEL: | |
120 | case XIRQ_TRIGGER_LOWLEVEL: | |
121 | mn10300_set_lateack_irq_type(XIRQ2IRQ(extnum)); | |
122 | break; | |
123 | default: | |
124 | break; | |
125 | } | |
126 | } | |
127 | ||
128 | #define IRQCTL __SYSREG(0xd5000090, u32) | |
129 | IRQCTL |= 0x02; | |
6044cf1d DH |
130 | |
131 | irq_fpga_init(); | |
368dd5ac | 132 | } |