Book a Demo!
CoCalc Logo Icon
StoreFeaturesDocsShareSupportNewsAboutPoliciesSign UpSign In
awilliam
GitHub Repository: awilliam/linux-vfio
 Path: blob/master/arch/m68k/platform/54xx/config.c
10819 views
1
/***************************************************************************/

2


3
/*

4
 *	linux/arch/m68knommu/platform/54xx/config.c

5
 *

6
 *	Copyright (C) 2010, Philippe De Muyter <[email protected]>

7
 */

8


9
/***************************************************************************/

10


11
#include <linux/kernel.h>

12
#include <linux/param.h>

13
#include <linux/init.h>

14
#include <linux/interrupt.h>

15
#include <linux/io.h>

16
#include <asm/machdep.h>

17
#include <asm/coldfire.h>

18
#include <asm/m54xxsim.h>

19
#include <asm/mcfuart.h>

20
#include <asm/m54xxgpt.h>

21


22
/***************************************************************************/

23


24
static struct mcf_platform_uart m54xx_uart_platform[] = {

25
	{

26
		.mapbase	= MCF_MBAR + MCFUART_BASE1,

27
		.irq		= 64 + 35,

28
	},

29
	{

30
		.mapbase	= MCF_MBAR + MCFUART_BASE2,

31
		.irq		= 64 + 34,

32
	},

33
	{

34
		.mapbase	= MCF_MBAR + MCFUART_BASE3,

35
		.irq		= 64 + 33,

36
	},

37
	{

38
		.mapbase	= MCF_MBAR + MCFUART_BASE4,

39
		.irq		= 64 + 32,

40
	},

41
};

42


43
static struct platform_device m54xx_uart = {

44
	.name			= "mcfuart",

45
	.id			= 0,

46
	.dev.platform_data	= m54xx_uart_platform,

47
};

48


49
static struct platform_device *m54xx_devices[] __initdata = {

50
	&m54xx_uart,

51
};

52


53


54
/***************************************************************************/

55


56
static void __init m54xx_uart_init_line(int line, int irq)

57
{

58
	int rts_cts;

59


60
	/* enable io pins */

61
	switch (line) {

62
	case 0:

63
		rts_cts = 0; break;

64
	case 1:

65
		rts_cts = MCF_PAR_PSC_RTS_RTS; break;

66
	case 2:

67
		rts_cts = MCF_PAR_PSC_RTS_RTS | MCF_PAR_PSC_CTS_CTS; break;

68
	case 3:

69
		rts_cts = 0; break;

70
	}

71
	__raw_writeb(MCF_PAR_PSC_TXD | rts_cts | MCF_PAR_PSC_RXD,

72
						MCF_MBAR + MCF_PAR_PSC(line));

73
}

74


75
static void __init m54xx_uarts_init(void)

76
{

77
	const int nrlines = ARRAY_SIZE(m54xx_uart_platform);

78
	int line;

79


80
	for (line = 0; (line < nrlines); line++)

81
		m54xx_uart_init_line(line, m54xx_uart_platform[line].irq);

82
}

83


84
/***************************************************************************/

85


86
static void mcf54xx_reset(void)

87
{

88
	/* disable interrupts and enable the watchdog */

89
	asm("movew #0x2700, %sr\n");

90
	__raw_writel(0, MCF_MBAR + MCF_GPT_GMS0);

91
	__raw_writel(MCF_GPT_GCIR_CNT(1), MCF_MBAR + MCF_GPT_GCIR0);

92
	__raw_writel(MCF_GPT_GMS_WDEN | MCF_GPT_GMS_CE | MCF_GPT_GMS_TMS(4),

93
						MCF_MBAR + MCF_GPT_GMS0);

94
}

95


96
/***************************************************************************/

97


98
void __init config_BSP(char *commandp, int size)

99
{

100
	mach_reset = mcf54xx_reset;

101
	m54xx_uarts_init();

102
}

103


104
/***************************************************************************/

105


106
static int __init init_BSP(void)

107
{

108


109
	platform_add_devices(m54xx_devices, ARRAY_SIZE(m54xx_devices));

110
	return 0;

111
}

112


113
arch_initcall(init_BSP);

114


115
/***************************************************************************/

116


117