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(val: 1, NETTEL_SMC0_ADDR + SMC91xx_BANKSELECT);
110 writew(val: macp[0], addr: ioaddr + SMC91xx_BASEMAC);
111 writew(val: macp[1], addr: ioaddr + SMC91xx_BASEMAC + 2);
112 writew(val: macp[2], addr: 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(val: 0x00ec, addr: MCFSIM_PADDR);
126 mcf_setppdata(0, 0x0080);
127 writew(val: 1, NETTEL_SMC0_ADDR + SMC91xx_BANKSELECT);
128 writew(val: 0x0067, NETTEL_SMC0_ADDR + SMC91xx_BASEADDR);
129 mcf_setppdata(0x0080, 0);
130
131 /* Set correct chip select timing for SMC9196 accesses */
132 writew(val: 0x1180, addr: 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, flashaddr: 0xf0006000);
140 nettel_smc91x_setmac(NETTEL_SMC1_ADDR, flashaddr: 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

source code of linux/arch/m68k/coldfire/nettel.c