xref: /openbmc/linux/arch/m68k/coldfire/nettel.c (revision b2441318)
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