arch/m68k/coldfire/nettel.c

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