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, 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, 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/***************************************************************************/