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/***************************************************************************/