1// SPDX-License-Identifier: GPL-2.0
2/***************************************************************************/
3
4/*
5 *	nettel.c -- startup code support for the NETtel boards
6 *
7 *	Copyright (C) 2009, Greg Ungerer (gerg@snapgear.com)
8 */
9
10/***************************************************************************/
11
12#include <linux/kernel.h>
13#include <linux/param.h>
14#include <linux/init.h>
15#include <linux/io.h>
16#include <linux/platform_device.h>
17#include <asm/coldfire.h>
18#include <asm/mcfsim.h>
19#include <asm/nettel.h>
20
21/***************************************************************************/
22
23/*
24 * Define the IO and interrupt resources of the 2 SMC9196 interfaces.
25 */
26#define	NETTEL_SMC0_ADDR	0x30600300
27#define	NETTEL_SMC0_IRQ		29
28
29#define	NETTEL_SMC1_ADDR	0x30600000
30#define	NETTEL_SMC1_IRQ		27
31
32/*
33 * We need some access into the SMC9196 registers. Define those registers
34 * we will need here (including the smc91x.h doesn't seem to give us these
35 * in a simple form).
36 */
37#define	SMC91xx_BANKSELECT	14
38#define	SMC91xx_BASEADDR	2
39#define	SMC91xx_BASEMAC		4
40
41/***************************************************************************/
42
43static struct resource nettel_smc91x_0_resources[] = {
44	{
45		.start		= NETTEL_SMC0_ADDR,
46		.end		= NETTEL_SMC0_ADDR + 0x20,
47		.flags		= IORESOURCE_MEM,
48	},
49	{
50		.start		= NETTEL_SMC0_IRQ,
51		.end		= NETTEL_SMC0_IRQ,
52		.flags		= IORESOURCE_IRQ,
53	},
54};
55
56static struct resource nettel_smc91x_1_resources[] = {
57	{
58		.start		= NETTEL_SMC1_ADDR,
59		.end		= NETTEL_SMC1_ADDR + 0x20,
60		.flags		= IORESOURCE_MEM,
61	},
62	{
63		.start		= NETTEL_SMC1_IRQ,
64		.end		= NETTEL_SMC1_IRQ,
65		.flags		= IORESOURCE_IRQ,
66	},
67};
68
69static struct platform_device nettel_smc91x[] = {
70	{
71		.name			= "smc91x",
72		.id			= 0,
73		.num_resources		= ARRAY_SIZE(nettel_smc91x_0_resources),
74		.resource		= nettel_smc91x_0_resources,
75	},
76	{
77		.name			= "smc91x",
78		.id			= 1,
79		.num_resources		= ARRAY_SIZE(nettel_smc91x_1_resources),
80		.resource		= nettel_smc91x_1_resources,
81	},
82};
83
84static struct platform_device *nettel_devices[] __initdata = {
85	&nettel_smc91x[0],
86	&nettel_smc91x[1],
87};
88
89/***************************************************************************/
90
91static u8 nettel_macdefault[] __initdata = {
92	0x00, 0xd0, 0xcf, 0x00, 0x00, 0x01,
93};
94
95/*
96 * Set flash contained MAC address into SMC9196 core. Make sure the flash
97 * MAC address is sane, and not an empty flash. If no good use the Moreton
98 * Bay default MAC address instead.
99 */
100
101static void __init nettel_smc91x_setmac(unsigned int ioaddr, unsigned int flashaddr)
102{
103	u16 *macp;
104
105	macp = (u16 *) flashaddr;
106	if ((macp[0] == 0xffff) && (macp[1] == 0xffff) && (macp[2] == 0xffff))
107		macp = (u16 *) &nettel_macdefault[0];
108
109	writew(1, NETTEL_SMC0_ADDR + SMC91xx_BANKSELECT);
110	writew(macp[0], ioaddr + SMC91xx_BASEMAC);
111	writew(macp[1], ioaddr + SMC91xx_BASEMAC + 2);
112	writew(macp[2], ioaddr + SMC91xx_BASEMAC + 4);
113}
114
115/***************************************************************************/
116
117/*
118 * Re-map the address space of at least one of the SMC ethernet
119 * parts. Both parts power up decoding the same address, so we
120 * need to move one of them first, before doing anything else.
121 */
122
123static void __init nettel_smc91x_init(void)
124{
125	writew(0x00ec, MCFSIM_PADDR);
126	mcf_setppdata(0, 0x0080);
127	writew(1, NETTEL_SMC0_ADDR + SMC91xx_BANKSELECT);
128	writew(0x0067, NETTEL_SMC0_ADDR + SMC91xx_BASEADDR);
129	mcf_setppdata(0x0080, 0);
130
131	/* Set correct chip select timing for SMC9196 accesses */
132	writew(0x1180, MCFSIM_CSCR3);
133
134	/* Set the SMC interrupts to be auto-vectored */
135	mcf_autovector(NETTEL_SMC0_IRQ);
136	mcf_autovector(NETTEL_SMC1_IRQ);
137
138	/* Set MAC addresses from flash for both interfaces */
139	nettel_smc91x_setmac(NETTEL_SMC0_ADDR, 0xf0006000);
140	nettel_smc91x_setmac(NETTEL_SMC1_ADDR, 0xf0006006);
141}
142
143/***************************************************************************/
144
145static int __init init_nettel(void)
146{
147	nettel_smc91x_init();
148	platform_add_devices(nettel_devices, ARRAY_SIZE(nettel_devices));
149	return 0;
150}
151
152arch_initcall(init_nettel);
153
154/***************************************************************************/
155