155 lines
4.0 KiB
C
155 lines
4.0 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/***************************************************************************/
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/*
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* nettel.c -- startup code support for the NETtel boards
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*
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* Copyright (C) 2009, Greg Ungerer (gerg@snapgear.com)
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*/
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/***************************************************************************/
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#include <linux/kernel.h>
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#include <linux/param.h>
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#include <linux/init.h>
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#include <linux/io.h>
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#include <linux/platform_device.h>
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#include <asm/coldfire.h>
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#include <asm/mcfsim.h>
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#include <asm/nettel.h>
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/***************************************************************************/
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/*
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* Define the IO and interrupt resources of the 2 SMC9196 interfaces.
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*/
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#define NETTEL_SMC0_ADDR 0x30600300
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#define NETTEL_SMC0_IRQ 29
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#define NETTEL_SMC1_ADDR 0x30600000
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#define NETTEL_SMC1_IRQ 27
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/*
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* We need some access into the SMC9196 registers. Define those registers
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* we will need here (including the smc91x.h doesn't seem to give us these
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* in a simple form).
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*/
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#define SMC91xx_BANKSELECT 14
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#define SMC91xx_BASEADDR 2
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#define SMC91xx_BASEMAC 4
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/***************************************************************************/
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static struct resource nettel_smc91x_0_resources[] = {
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{
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.start = NETTEL_SMC0_ADDR,
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.end = NETTEL_SMC0_ADDR + 0x20,
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.flags = IORESOURCE_MEM,
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},
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{
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.start = NETTEL_SMC0_IRQ,
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.end = NETTEL_SMC0_IRQ,
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.flags = IORESOURCE_IRQ,
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},
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};
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static struct resource nettel_smc91x_1_resources[] = {
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{
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.start = NETTEL_SMC1_ADDR,
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.end = NETTEL_SMC1_ADDR + 0x20,
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.flags = IORESOURCE_MEM,
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},
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{
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.start = NETTEL_SMC1_IRQ,
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.end = NETTEL_SMC1_IRQ,
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.flags = IORESOURCE_IRQ,
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},
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};
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static struct platform_device nettel_smc91x[] = {
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{
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.name = "smc91x",
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.id = 0,
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.num_resources = ARRAY_SIZE(nettel_smc91x_0_resources),
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.resource = nettel_smc91x_0_resources,
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},
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{
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.name = "smc91x",
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.id = 1,
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.num_resources = ARRAY_SIZE(nettel_smc91x_1_resources),
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.resource = nettel_smc91x_1_resources,
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},
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};
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static struct platform_device *nettel_devices[] __initdata = {
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&nettel_smc91x[0],
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&nettel_smc91x[1],
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};
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/***************************************************************************/
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static u8 nettel_macdefault[] __initdata = {
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0x00, 0xd0, 0xcf, 0x00, 0x00, 0x01,
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};
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/*
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* Set flash contained MAC address into SMC9196 core. Make sure the flash
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* MAC address is sane, and not an empty flash. If no good use the Moreton
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* Bay default MAC address instead.
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*/
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static void __init nettel_smc91x_setmac(unsigned int ioaddr, unsigned int flashaddr)
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{
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u16 *macp;
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macp = (u16 *) flashaddr;
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if ((macp[0] == 0xffff) && (macp[1] == 0xffff) && (macp[2] == 0xffff))
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macp = (u16 *) &nettel_macdefault[0];
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writew(1, NETTEL_SMC0_ADDR + SMC91xx_BANKSELECT);
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writew(macp[0], ioaddr + SMC91xx_BASEMAC);
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writew(macp[1], ioaddr + SMC91xx_BASEMAC + 2);
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writew(macp[2], ioaddr + SMC91xx_BASEMAC + 4);
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}
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/***************************************************************************/
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/*
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* Re-map the address space of at least one of the SMC ethernet
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* parts. Both parts power up decoding the same address, so we
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* need to move one of them first, before doing anything else.
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*/
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static void __init nettel_smc91x_init(void)
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{
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writew(0x00ec, MCFSIM_PADDR);
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mcf_setppdata(0, 0x0080);
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writew(1, NETTEL_SMC0_ADDR + SMC91xx_BANKSELECT);
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writew(0x0067, NETTEL_SMC0_ADDR + SMC91xx_BASEADDR);
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mcf_setppdata(0x0080, 0);
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/* Set correct chip select timing for SMC9196 accesses */
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writew(0x1180, MCFSIM_CSCR3);
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/* Set the SMC interrupts to be auto-vectored */
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mcf_autovector(NETTEL_SMC0_IRQ);
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mcf_autovector(NETTEL_SMC1_IRQ);
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/* Set MAC addresses from flash for both interfaces */
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nettel_smc91x_setmac(NETTEL_SMC0_ADDR, 0xf0006000);
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nettel_smc91x_setmac(NETTEL_SMC1_ADDR, 0xf0006006);
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}
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/***************************************************************************/
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static int __init init_nettel(void)
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{
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nettel_smc91x_init();
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platform_add_devices(nettel_devices, ARRAY_SIZE(nettel_devices));
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return 0;
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}
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arch_initcall(init_nettel);
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/***************************************************************************/
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