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Diffstat (limited to 'arch/ppc/platforms/4xx/xilinx_ml403.c')
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diff --git a/arch/ppc/platforms/4xx/xilinx_ml403.c b/arch/ppc/platforms/4xx/xilinx_ml403.c
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1/*
2 * arch/ppc/platforms/4xx/xilinx_ml403.c
3 *
4 * Xilinx ML403 evaluation board initialization
5 *
6 * Author: Grant Likely <grant.likely@secretlab.ca>
7 *
8 * 2005 (c) Secret Lab Technologies Ltd.
9 * 2002-2004 (c) MontaVista Software, Inc.
10 *
11 * This file is licensed under the terms of the GNU General Public License
12 * version 2. This program is licensed "as is" without any warranty of any
13 * kind, whether express or implied.
14 */
15
16#include <linux/config.h>
17#include <linux/init.h>
18#include <linux/irq.h>
19#include <linux/tty.h>
20#include <linux/serial.h>
21#include <linux/serial_core.h>
22#include <linux/serial_8250.h>
23#include <linux/serialP.h>
24#include <asm/io.h>
25#include <asm/machdep.h>
26#include <asm/ppc_sys.h>
27
28#include <syslib/gen550.h>
29#include <platforms/4xx/xparameters/xparameters.h>
30
31/*
32 * As an overview of how the following functions (platform_init,
33 * ml403_map_io, ml403_setup_arch and ml403_init_IRQ) fit into the
34 * kernel startup procedure, here's a call tree:
35 *
36 * start_here arch/ppc/kernel/head_4xx.S
37 * early_init arch/ppc/kernel/setup.c
38 * machine_init arch/ppc/kernel/setup.c
39 * platform_init this file
40 * ppc4xx_init arch/ppc/syslib/ppc4xx_setup.c
41 * parse_bootinfo
42 * find_bootinfo
43 * "setup some default ppc_md pointers"
44 * MMU_init arch/ppc/mm/init.c
45 * *ppc_md.setup_io_mappings == ml403_map_io this file
46 * ppc4xx_map_io arch/ppc/syslib/ppc4xx_setup.c
47 * start_kernel init/main.c
48 * setup_arch arch/ppc/kernel/setup.c
49 * #if defined(CONFIG_KGDB)
50 * *ppc_md.kgdb_map_scc() == gen550_kgdb_map_scc
51 * #endif
52 * *ppc_md.setup_arch == ml403_setup_arch this file
53 * ppc4xx_setup_arch arch/ppc/syslib/ppc4xx_setup.c
54 * ppc4xx_find_bridges arch/ppc/syslib/ppc405_pci.c
55 * init_IRQ arch/ppc/kernel/irq.c
56 * *ppc_md.init_IRQ == ml403_init_IRQ this file
57 * ppc4xx_init_IRQ arch/ppc/syslib/ppc4xx_setup.c
58 * ppc4xx_pic_init arch/ppc/syslib/xilinx_pic.c
59 */
60
61/* Board specifications structures */
62struct ppc_sys_spec *cur_ppc_sys_spec;
63struct ppc_sys_spec ppc_sys_specs[] = {
64 {
65 /* Only one entry, always assume the same design */
66 .ppc_sys_name = "Xilinx ML403 Reference Design",
67 .mask = 0x00000000,
68 .value = 0x00000000,
69 .num_devices = 1,
70 .device_list = (enum ppc_sys_devices[])
71 {
72 VIRTEX_UART,
73 },
74 },
75};
76
77#if defined(XPAR_POWER_0_POWERDOWN_BASEADDR)
78
79static volatile unsigned *powerdown_base =
80 (volatile unsigned *) XPAR_POWER_0_POWERDOWN_BASEADDR;
81
82static void
83xilinx_power_off(void)
84{
85 local_irq_disable();
86 out_be32(powerdown_base, XPAR_POWER_0_POWERDOWN_VALUE);
87 while (1) ;
88}
89#endif
90
91void __init
92ml403_map_io(void)
93{
94 ppc4xx_map_io();
95
96#if defined(XPAR_POWER_0_POWERDOWN_BASEADDR)
97 powerdown_base = ioremap((unsigned long) powerdown_base,
98 XPAR_POWER_0_POWERDOWN_HIGHADDR -
99 XPAR_POWER_0_POWERDOWN_BASEADDR + 1);
100#endif
101}
102
103/* Early serial support functions */
104static void __init
105ml403_early_serial_init(int num, struct plat_serial8250_port *pdata)
106{
107#if defined(CONFIG_SERIAL_TEXT_DEBUG) || defined(CONFIG_KGDB)
108 struct uart_port serial_req;
109
110 memset(&serial_req, 0, sizeof(serial_req));
111 serial_req.mapbase = pdata->mapbase;
112 serial_req.membase = pdata->membase;
113 serial_req.irq = pdata->irq;
114 serial_req.uartclk = pdata->uartclk;
115 serial_req.regshift = pdata->regshift;
116 serial_req.iotype = pdata->iotype;
117 serial_req.flags = pdata->flags;
118 gen550_init(num, &serial_req);
119#endif
120}
121
122void __init
123ml403_early_serial_map(void)
124{
125#ifdef CONFIG_SERIAL_8250
126 struct plat_serial8250_port *pdata;
127 int i = 0;
128
129 pdata = (struct plat_serial8250_port *) ppc_sys_get_pdata(VIRTEX_UART);
130 while(pdata && pdata->flags)
131 {
132 pdata->membase = ioremap(pdata->mapbase, 0x100);
133 ml403_early_serial_init(i, pdata);
134 pdata++;
135 i++;
136 }
137#endif /* CONFIG_SERIAL_8250 */
138}
139
140void __init
141ml403_setup_arch(void)
142{
143 ml403_early_serial_map();
144 ppc4xx_setup_arch(); /* calls ppc4xx_find_bridges() */
145
146 /* Identify the system */
147 printk(KERN_INFO "Xilinx ML403 Reference System (Virtex-4 FX)\n");
148}
149
150/* Called after board_setup_irq from ppc4xx_init_IRQ(). */
151void __init
152ml403_init_irq(void)
153{
154 ppc4xx_init_IRQ();
155}
156
157void __init
158platform_init(unsigned long r3, unsigned long r4, unsigned long r5,
159 unsigned long r6, unsigned long r7)
160{
161 ppc4xx_init(r3, r4, r5, r6, r7);
162
163 identify_ppc_sys_by_id(mfspr(SPRN_PVR));
164
165 ppc_md.setup_arch = ml403_setup_arch;
166 ppc_md.setup_io_mappings = ml403_map_io;
167 ppc_md.init_IRQ = ml403_init_irq;
168
169#if defined(XPAR_POWER_0_POWERDOWN_BASEADDR)
170 ppc_md.power_off = xilinx_power_off;
171#endif
172
173#ifdef CONFIG_KGDB
174 ppc_md.early_serial_map = ml403_early_serial_map;
175#endif
176}
177
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