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ea49f8ff PDM |
1 | /***************************************************************************/ |
2 | ||
3 | /* | |
4 | * linux/arch/m68knommu/platform/548x/config.c | |
5 | * | |
6 | * Copyright (C) 2010, Philippe De Muyter <phdm@macqel.be> | |
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/m548xsim.h> | |
19 | #include <asm/mcfuart.h> | |
20 | #include <asm/m548xgpt.h> | |
21 | ||
22 | /***************************************************************************/ | |
23 | ||
24 | static struct mcf_platform_uart m548x_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 m548x_uart = { | |
44 | .name = "mcfuart", | |
45 | .id = 0, | |
46 | .dev.platform_data = m548x_uart_platform, | |
47 | }; | |
48 | ||
49 | static struct platform_device *m548x_devices[] __initdata = { | |
50 | &m548x_uart, | |
51 | }; | |
52 | ||
53 | ||
54 | /***************************************************************************/ | |
55 | ||
56 | static void __init m548x_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 m548x_uarts_init(void) | |
76 | { | |
77 | const int nrlines = ARRAY_SIZE(m548x_uart_platform); | |
78 | int line; | |
79 | ||
80 | for (line = 0; (line < nrlines); line++) | |
81 | m548x_uart_init_line(line, m548x_uart_platform[line].irq); | |
82 | } | |
83 | ||
84 | /***************************************************************************/ | |
85 | ||
86 | static void mcf548x_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 = mcf548x_reset; | |
101 | m548x_uarts_init(); | |
102 | } | |
103 | ||
104 | /***************************************************************************/ | |
105 | ||
106 | static int __init init_BSP(void) | |
107 | { | |
108 | ||
109 | platform_add_devices(m548x_devices, ARRAY_SIZE(m548x_devices)); | |
110 | return 0; | |
111 | } | |
112 | ||
113 | arch_initcall(init_BSP); | |
114 | ||
115 | /***************************************************************************/ |