에프에이리눅스 / 1611_0007_prime_oven

Blame view

kernel/linux-imx6_3.14.28/arch/mn10300/unit-asb2364/unit-init.c 3.41 KB
edit raw normal view history
6b13f685e   김민수   BSP 최초 추가 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
 
  /* ASB2364 initialisation
   *
   * Copyright (C) 2002 Red Hat, Inc. All Rights Reserved.
   * Written by David Howells (dhowells@redhat.com)
   *
   * This program is free software; you can redistribute it and/or
   * modify it under the terms of the GNU General Public License
   * as published by the Free Software Foundation; either version
   * 2 of the License, or (at your option) any later version.
   */
  
  #include <linux/kernel.h>
  #include <linux/param.h>
  #include <linux/init.h>
  #include <linux/device.h>
  #include <linux/delay.h>
  
  #include <asm/io.h>
  #include <asm/setup.h>
  #include <asm/processor.h>
  #include <asm/irq.h>
  #include <asm/intctl-regs.h>
  #include <asm/serial-regs.h>
  #include <unit/fpga-regs.h>
  #include <unit/serial.h>
  #include <unit/smsc911x.h>
  
  #define TTYS0_SERIAL_IER	__SYSREG(SERIAL_PORT0_BASE_ADDRESS + UART_IER * 2, u8)
  #define LAN_IRQ_CFG		__SYSREG(SMSC911X_BASE + 0x54, u32)
  #define LAN_INT_EN		__SYSREG(SMSC911X_BASE + 0x5c, u32)
  
  /*
   * initialise some of the unit hardware before gdbstub is set up
   */
  asmlinkage void __init unit_init(void)
  {
  	/* Make sure we aren't going to get unexpected interrupts */
  	TTYS0_SERIAL_IER = 0;
  	SC0RXICR = 0;
  	SC0TXICR = 0;
  	SC1RXICR = 0;
  	SC1TXICR = 0;
  	SC2RXICR = 0;
  	SC2TXICR = 0;
  
  	/* Attempt to reset the FPGA attached peripherals */
  	ASB2364_FPGA_REG_RESET_LAN = 0x0000;
  	SyncExBus();
  	ASB2364_FPGA_REG_RESET_UART = 0x0000;
  	SyncExBus();
  	ASB2364_FPGA_REG_RESET_I2C = 0x0000;
  	SyncExBus();
  	ASB2364_FPGA_REG_RESET_USB = 0x0000;
  	SyncExBus();
  	ASB2364_FPGA_REG_RESET_AV = 0x0000;
  	SyncExBus();
  
  	/* set up the external interrupts */
  
  	/* XIRQ[0]: NAND RXBY */
  	/* SET_XIRQ_TRIGGER(0, XIRQ_TRIGGER_LOWLEVEL); */
  
  	/* XIRQ[1]: LAN, UART, I2C, USB, PCI, FPGA */
  	SET_XIRQ_TRIGGER(1, XIRQ_TRIGGER_LOWLEVEL);
  
  	/* XIRQ[2]: Extend Slot 1-9 */
  	/* SET_XIRQ_TRIGGER(2, XIRQ_TRIGGER_LOWLEVEL); */
  
  #if defined(CONFIG_EXT_SERIAL_IRQ_LEVEL) &&	\
      defined(CONFIG_ETHERNET_IRQ_LEVEL) &&	\
      (CONFIG_EXT_SERIAL_IRQ_LEVEL != CONFIG_ETHERNET_IRQ_LEVEL)
  # error CONFIG_EXT_SERIAL_IRQ_LEVEL != CONFIG_ETHERNET_IRQ_LEVEL
  #endif
  
  #if defined(CONFIG_EXT_SERIAL_IRQ_LEVEL)
  	set_intr_level(XIRQ1, NUM2GxICR_LEVEL(CONFIG_EXT_SERIAL_IRQ_LEVEL));
  #elif defined(CONFIG_ETHERNET_IRQ_LEVEL)
  	set_intr_level(XIRQ1, NUM2GxICR_LEVEL(CONFIG_ETHERNET_IRQ_LEVEL));
  #endif
  }
  
  /*
   * initialise the rest of the unit hardware after gdbstub is ready
   */
  asmlinkage void __init unit_setup(void)
  {
  	/* Release the reset on the SMSC911X so that it is ready by the time we
  	 * need it */
  	ASB2364_FPGA_REG_RESET_LAN = 0x0001;
  	SyncExBus();
  	ASB2364_FPGA_REG_RESET_UART = 0x0001;
  	SyncExBus();
  	ASB2364_FPGA_REG_RESET_I2C = 0x0001;
  	SyncExBus();
  	ASB2364_FPGA_REG_RESET_USB = 0x0001;
  	SyncExBus();
  	ASB2364_FPGA_REG_RESET_AV = 0x0001;
  	SyncExBus();
  
  	/* Make sure the ethernet chipset isn't going to give us an interrupt
  	 * storm from stuff it was doing pre-reset */
  	LAN_IRQ_CFG = 0;
  	LAN_INT_EN = 0;
  }
  
  /*
   * initialise the external interrupts used by a unit of this type
   */
  void __init unit_init_IRQ(void)
  {
  	unsigned int extnum;
  
  	for (extnum = 0 ; extnum < NR_XIRQS ; extnum++) {
  		switch (GET_XIRQ_TRIGGER(extnum)) {
  			/* LEVEL triggered interrupts should be made
  			 * post-ACK'able as they hold their lines until
  			 * serviced
  			 */
  		case XIRQ_TRIGGER_HILEVEL:
  		case XIRQ_TRIGGER_LOWLEVEL:
  			mn10300_set_lateack_irq_type(XIRQ2IRQ(extnum));
  			break;
  		default:
  			break;
  		}
  	}
  
  #define IRQCTL	__SYSREG(0xd5000090, u32)
  	IRQCTL |= 0x02;
  
  	irq_fpga_init();
  }