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Philippe De Muyterea49f8ff2010-09-20 13:11:11 +02001/***************************************************************************/
2
3/*
Greg Ungerer5b2e6552010-11-02 12:05:29 +10004 * linux/arch/m68knommu/platform/54xx/config.c
Philippe De Muyterea49f8ff2010-09-20 13:11:11 +02005 *
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>
Greg Ungerer88be3512011-10-14 15:06:22 +100016#include <linux/mm.h>
17#include <linux/bootmem.h>
18#include <asm/pgalloc.h>
Philippe De Muyterea49f8ff2010-09-20 13:11:11 +020019#include <asm/machdep.h>
20#include <asm/coldfire.h>
Greg Ungerer5b2e6552010-11-02 12:05:29 +100021#include <asm/m54xxsim.h>
Philippe De Muyterea49f8ff2010-09-20 13:11:11 +020022#include <asm/mcfuart.h>
Greg Ungerer5b2e6552010-11-02 12:05:29 +100023#include <asm/m54xxgpt.h>
Greg Ungerer88be3512011-10-14 15:06:22 +100024#ifdef CONFIG_MMU
25#include <asm/mmu_context.h>
26#endif
Philippe De Muyterea49f8ff2010-09-20 13:11:11 +020027
28/***************************************************************************/
29
Greg Ungerer5b2e6552010-11-02 12:05:29 +100030static struct mcf_platform_uart m54xx_uart_platform[] = {
Philippe De Muyterea49f8ff2010-09-20 13:11:11 +020031 {
Greg Ungererbbbeeaf2011-12-24 00:46:37 +100032 .mapbase = MCFUART_BASE0,
33 .irq = MCF_IRQ_UART0,
Philippe De Muyterea49f8ff2010-09-20 13:11:11 +020034 },
35 {
Greg Ungererbbbeeaf2011-12-24 00:46:37 +100036 .mapbase = MCFUART_BASE1,
37 .irq = MCF_IRQ_UART1,
Philippe De Muyterea49f8ff2010-09-20 13:11:11 +020038 },
39 {
Greg Ungererbbbeeaf2011-12-24 00:46:37 +100040 .mapbase = MCFUART_BASE2,
41 .irq = MCF_IRQ_UART2,
Philippe De Muyterea49f8ff2010-09-20 13:11:11 +020042 },
43 {
Greg Ungererbbbeeaf2011-12-24 00:46:37 +100044 .mapbase = MCFUART_BASE3,
45 .irq = MCF_IRQ_UART3,
Philippe De Muyterea49f8ff2010-09-20 13:11:11 +020046 },
47};
48
Greg Ungerer5b2e6552010-11-02 12:05:29 +100049static struct platform_device m54xx_uart = {
Philippe De Muyterea49f8ff2010-09-20 13:11:11 +020050 .name = "mcfuart",
51 .id = 0,
Greg Ungerer5b2e6552010-11-02 12:05:29 +100052 .dev.platform_data = m54xx_uart_platform,
Philippe De Muyterea49f8ff2010-09-20 13:11:11 +020053};
54
Greg Ungerer5b2e6552010-11-02 12:05:29 +100055static struct platform_device *m54xx_devices[] __initdata = {
56 &m54xx_uart,
Philippe De Muyterea49f8ff2010-09-20 13:11:11 +020057};
58
59
60/***************************************************************************/
61
Greg Ungerer5b2e6552010-11-02 12:05:29 +100062static void __init m54xx_uart_init_line(int line, int irq)
Philippe De Muyterea49f8ff2010-09-20 13:11:11 +020063{
64 int rts_cts;
65
66 /* enable io pins */
67 switch (line) {
68 case 0:
69 rts_cts = 0; break;
70 case 1:
71 rts_cts = MCF_PAR_PSC_RTS_RTS; break;
72 case 2:
73 rts_cts = MCF_PAR_PSC_RTS_RTS | MCF_PAR_PSC_CTS_CTS; break;
74 case 3:
75 rts_cts = 0; break;
76 }
77 __raw_writeb(MCF_PAR_PSC_TXD | rts_cts | MCF_PAR_PSC_RXD,
78 MCF_MBAR + MCF_PAR_PSC(line));
79}
80
Greg Ungerer5b2e6552010-11-02 12:05:29 +100081static void __init m54xx_uarts_init(void)
Philippe De Muyterea49f8ff2010-09-20 13:11:11 +020082{
Greg Ungerer5b2e6552010-11-02 12:05:29 +100083 const int nrlines = ARRAY_SIZE(m54xx_uart_platform);
Philippe De Muyterea49f8ff2010-09-20 13:11:11 +020084 int line;
85
86 for (line = 0; (line < nrlines); line++)
Greg Ungerer5b2e6552010-11-02 12:05:29 +100087 m54xx_uart_init_line(line, m54xx_uart_platform[line].irq);
Philippe De Muyterea49f8ff2010-09-20 13:11:11 +020088}
89
90/***************************************************************************/
91
Greg Ungerer5b2e6552010-11-02 12:05:29 +100092static void mcf54xx_reset(void)
Philippe De Muyterea49f8ff2010-09-20 13:11:11 +020093{
94 /* disable interrupts and enable the watchdog */
95 asm("movew #0x2700, %sr\n");
96 __raw_writel(0, MCF_MBAR + MCF_GPT_GMS0);
97 __raw_writel(MCF_GPT_GCIR_CNT(1), MCF_MBAR + MCF_GPT_GCIR0);
98 __raw_writel(MCF_GPT_GMS_WDEN | MCF_GPT_GMS_CE | MCF_GPT_GMS_TMS(4),
99 MCF_MBAR + MCF_GPT_GMS0);
100}
101
102/***************************************************************************/
103
Greg Ungerer88be3512011-10-14 15:06:22 +1000104#ifdef CONFIG_MMU
105
106unsigned long num_pages;
107
108static void __init mcf54xx_bootmem_alloc(void)
109{
110 unsigned long start_pfn;
111 unsigned long memstart;
112
113 /* _rambase and _ramend will be naturally page aligned */
114 m68k_memory[0].addr = _rambase;
115 m68k_memory[0].size = _ramend - _rambase;
116
117 /* compute total pages in system */
118 num_pages = (_ramend - _rambase) >> PAGE_SHIFT;
119
120 /* page numbers */
121 memstart = PAGE_ALIGN(_ramstart);
122 min_low_pfn = _rambase >> PAGE_SHIFT;
123 start_pfn = memstart >> PAGE_SHIFT;
124 max_low_pfn = _ramend >> PAGE_SHIFT;
125 high_memory = (void *)_ramend;
126
127 m68k_virt_to_node_shift = fls(_ramend - _rambase - 1) - 6;
128 module_fixup(NULL, __start_fixup, __stop_fixup);
129
130 /* setup bootmem data */
131 m68k_setup_node(0);
132 memstart += init_bootmem_node(NODE_DATA(0), start_pfn,
133 min_low_pfn, max_low_pfn);
134 free_bootmem_node(NODE_DATA(0), memstart, _ramend - memstart);
135}
136
137#endif /* CONFIG_MMU */
138
139/***************************************************************************/
140
Philippe De Muyterea49f8ff2010-09-20 13:11:11 +0200141void __init config_BSP(char *commandp, int size)
142{
Greg Ungerer88be3512011-10-14 15:06:22 +1000143#ifdef CONFIG_MMU
144 mcf54xx_bootmem_alloc();
145 mmu_context_init();
146#endif
Greg Ungerer5b2e6552010-11-02 12:05:29 +1000147 mach_reset = mcf54xx_reset;
Greg Ungerer35aefb22012-01-23 15:34:58 +1000148 mach_sched_init = hw_timer_init;
Greg Ungerer5b2e6552010-11-02 12:05:29 +1000149 m54xx_uarts_init();
Philippe De Muyterea49f8ff2010-09-20 13:11:11 +0200150}
151
152/***************************************************************************/
153
154static int __init init_BSP(void)
155{
156
Greg Ungerer5b2e6552010-11-02 12:05:29 +1000157 platform_add_devices(m54xx_devices, ARRAY_SIZE(m54xx_devices));
Philippe De Muyterea49f8ff2010-09-20 13:11:11 +0200158 return 0;
159}
160
161arch_initcall(init_BSP);
162
163/***************************************************************************/