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
43 static 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
56 static 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
69 static 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
84 static struct platform_device *nettel_devices[] __initdata = {
85 &nettel_smc91x[0],
86 &nettel_smc91x[1],
87 };
88
89 /***************************************************************************/
90
91 static 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
nettel_smc91x_setmac(unsigned int ioaddr,unsigned int flashaddr)101 static 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
nettel_smc91x_init(void)123 static 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
init_nettel(void)145 static 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
152 arch_initcall(init_nettel);
153
154 /***************************************************************************/
155