nettel.c revision 66d857b08b8c3ed5c72c361f863cce77d2a978d7 
1/***************************************************************************/
2
3/*
4 *	nettel.c -- startup code support for the NETtel boards
5 *
6 *	Copyright (C) 2009, Greg Ungerer (gerg@snapgear.com)
7 */
8
9/***************************************************************************/
10
11#include <linux/kernel.h>
12#include <linux/param.h>
13#include <linux/init.h>
14#include <linux/io.h>
15#include <linux/platform_device.h>
16#include <asm/coldfire.h>
17#include <asm/mcfsim.h>
18#include <asm/nettel.h>
19
20/***************************************************************************/
21
22/*
23 * Define the IO and interrupt resources of the 2 SMC9196 interfaces.
24 */
25#define	NETTEL_SMC0_ADDR	0x30600300
26#define	NETTEL_SMC0_IRQ		29
27
28#define	NETTEL_SMC1_ADDR	0x30600000
29#define	NETTEL_SMC1_IRQ		27
30
31/*
32 * We need some access into the SMC9196 registers. Define those registers
33 * we will need here (including the smc91x.h doesn't seem to give us these
34 * in a simple form).
35 */
36#define	SMC91xx_BANKSELECT	14
37#define	SMC91xx_BASEADDR	2
38#define	SMC91xx_BASEMAC		4
39
40/***************************************************************************/
41
42static struct resource nettel_smc91x_0_resources[] = {
43	{
44		.start		= NETTEL_SMC0_ADDR,
45		.end		= NETTEL_SMC0_ADDR + 0x20,
46		.flags		= IORESOURCE_MEM,
47	},
48	{
49		.start		= NETTEL_SMC0_IRQ,
50		.end		= NETTEL_SMC0_IRQ,
51		.flags		= IORESOURCE_IRQ,
52	},
53};
54
55static struct resource nettel_smc91x_1_resources[] = {
56	{
57		.start		= NETTEL_SMC1_ADDR,
58		.end		= NETTEL_SMC1_ADDR + 0x20,
59		.flags		= IORESOURCE_MEM,
60	},
61	{
62		.start		= NETTEL_SMC1_IRQ,
63		.end		= NETTEL_SMC1_IRQ,
64		.flags		= IORESOURCE_IRQ,
65	},
66};
67
68static struct platform_device nettel_smc91x[] = {
69	{
70		.name			= "smc91x",
71		.id			= 0,
72		.num_resources		= ARRAY_SIZE(nettel_smc91x_0_resources),
73		.resource		= nettel_smc91x_0_resources,
74	},
75	{
76		.name			= "smc91x",
77		.id			= 1,
78		.num_resources		= ARRAY_SIZE(nettel_smc91x_1_resources),
79		.resource		= nettel_smc91x_1_resources,
80	},
81};
82
83static struct platform_device *nettel_devices[] __initdata = {
84	&nettel_smc91x[0],
85	&nettel_smc91x[1],
86};
87
88/***************************************************************************/
89
90static u8 nettel_macdefault[] __initdata = {
91	0x00, 0xd0, 0xcf, 0x00, 0x00, 0x01,
92};
93
94/*
95 * Set flash contained MAC address into SMC9196 core. Make sure the flash
96 * MAC address is sane, and not an empty flash. If no good use the Moreton
97 * Bay default MAC address instead.
98 */
99
100static void __init nettel_smc91x_setmac(unsigned int ioaddr, unsigned int flashaddr)
101{
102	u16 *macp;
103
104	macp = (u16 *) flashaddr;
105	if ((macp[0] == 0xffff) && (macp[1] == 0xffff) && (macp[2] == 0xffff))
106		macp = (u16 *) &nettel_macdefault[0];
107
108	writew(1, NETTEL_SMC0_ADDR + SMC91xx_BANKSELECT);
109	writew(macp[0], ioaddr + SMC91xx_BASEMAC);
110	writew(macp[1], ioaddr + SMC91xx_BASEMAC + 2);
111	writew(macp[2], ioaddr + SMC91xx_BASEMAC + 4);
112}
113
114/***************************************************************************/
115
116/*
117 * Re-map the address space of at least one of the SMC ethernet
118 * parts. Both parts power up decoding the same address, so we
119 * need to move one of them first, before doing anything else.
120 */
121
122static void __init nettel_smc91x_init(void)
123{
124	writew(0x00ec, MCF_MBAR + MCFSIM_PADDR);
125	mcf_setppdata(0, 0x0080);
126	writew(1, NETTEL_SMC0_ADDR + SMC91xx_BANKSELECT);
127	writew(0x0067, NETTEL_SMC0_ADDR + SMC91xx_BASEADDR);
128	mcf_setppdata(0x0080, 0);
129
130	/* Set correct chip select timing for SMC9196 accesses */
131	writew(0x1180, MCF_MBAR + MCFSIM_CSCR3);
132
133	/* Set the SMC interrupts to be auto-vectored */
134	mcf_autovector(NETTEL_SMC0_IRQ);
135	mcf_autovector(NETTEL_SMC1_IRQ);
136
137	/* Set MAC addresses from flash for both interfaces */
138	nettel_smc91x_setmac(NETTEL_SMC0_ADDR, 0xf0006000);
139	nettel_smc91x_setmac(NETTEL_SMC1_ADDR, 0xf0006006);
140}
141
142/***************************************************************************/
143
144static int __init init_nettel(void)
145{
146	nettel_smc91x_init();
147	platform_add_devices(nettel_devices, ARRAY_SIZE(nettel_devices));
148	return 0;
149}
150
151arch_initcall(init_nettel);
152
153/***************************************************************************/
154