arch/ppc/platforms/4xx/redwood6.c

   1 /*
   2  * arch/ppc/platforms/4xx/redwood6.c
   3  *
   4  * Author: Armin Kuster <akuster@mvista.com>
   5  *
   6  * 2002 (c) MontaVista, Software, Inc.  This file is licensed under
   7  * the terms of the GNU General Public License version 2.  This program
   8  * is licensed "as is" without any warranty of any kind, whether express
   9  * or implied.
  10  */
  11
  12 #include <linux/config.h>
  13 #include <linux/init.h>
  14 #include <linux/pagemap.h>
  15 #include <linux/platform_device.h>
  16 #include <linux/ioport.h>
  17 #include <asm/io.h>
  18 #include <asm/ppc4xx_pic.h>
  19 #include <linux/delay.h>
  20 #include <asm/machdep.h>
  21
  22 /*
  23  * Define external IRQ senses and polarities.
  24  */
  25 unsigned char ppc4xx_uic_ext_irq_cfg[] __initdata = {
  26         (IRQ_SENSE_LEVEL | IRQ_POLARITY_NEGATIVE),      /* Ext Int 7 */
  27         (IRQ_SENSE_LEVEL | IRQ_POLARITY_NEGATIVE),      /* Ext Int 8 */
  28         (IRQ_SENSE_LEVEL | IRQ_POLARITY_NEGATIVE),      /* Ext Int 9 */
  29         (IRQ_SENSE_LEVEL | IRQ_POLARITY_NEGATIVE),      /* Ext Int 0 */
  30         (IRQ_SENSE_LEVEL | IRQ_POLARITY_NEGATIVE),      /* Ext Int 1 */
  31         (IRQ_SENSE_LEVEL | IRQ_POLARITY_NEGATIVE),      /* Ext Int 2 */
  32         (IRQ_SENSE_LEVEL | IRQ_POLARITY_NEGATIVE),      /* Ext Int 3 */
  33         (IRQ_SENSE_LEVEL | IRQ_POLARITY_NEGATIVE),      /* Ext Int 4 */
  34         (IRQ_SENSE_LEVEL | IRQ_POLARITY_NEGATIVE),      /* Ext Int 5 */
  35         (IRQ_SENSE_LEVEL | IRQ_POLARITY_NEGATIVE),      /* Ext Int 6 */
  36 };
  37
  38 static struct resource smc91x_resources[] = {
  39         [0] = {
  40                 .start  = SMC91111_BASE_ADDR,
  41                 .end    = SMC91111_BASE_ADDR + SMC91111_REG_SIZE - 1,
  42                 .flags  = IORESOURCE_MEM,
  43         },
  44         [1] = {
  45                 .start  = SMC91111_IRQ,
  46                 .end    = SMC91111_IRQ,
  47                 .flags  = IORESOURCE_IRQ,
  48         },
  49 };
  50
  51 static struct platform_device smc91x_device = {
  52         .name           = "smc91x",
  53         .id             = 0,
  54         .num_resources  = ARRAY_SIZE(smc91x_resources),
  55         .resource       = smc91x_resources,
  56 };
  57
  58 static struct platform_device *redwood6_devs[] __initdata = {
  59         &smc91x_device,
  60 };
  61
  62 static int __init
  63 redwood6_platform_add_devices(void)
  64 {
  65         return platform_add_devices(redwood6_devs, ARRAY_SIZE(redwood6_devs));
  66 }
  67
  68
  69 void __init
  70 redwood6_setup_arch(void)
  71 {
  72 #ifdef CONFIG_IDE
  73         void *xilinx, *xilinx_1, *xilinx_2;
  74         unsigned short us_reg5;
  75 #endif
  76
  77         ppc4xx_setup_arch();
  78
  79 #ifdef CONFIG_IDE
  80         xilinx = (unsigned long) ioremap(IDE_XLINUX_MUX_BASE, 0x10);
  81         /* init xilinx control registers - enable ide mux, clear reset bit */
  82         if (!xilinx) {
  83                 printk(KERN_CRIT
  84                        "redwood6_setup_arch() xilinxi ioremap failed\n");
  85                 return;
  86         }
  87         xilinx_1 = xilinx + 0xa;
  88         xilinx_2 = xilinx + 0xe;
  89
  90         us_reg5 = readb(xilinx_1);
  91         writeb(0x01d1, xilinx_1);
  92         writeb(0x0008, xilinx_2);
  93
  94         udelay(10 * 1000);
  95
  96         writeb(0x01d1, xilinx_1);
  97         writeb(0x0008, xilinx_2);
  98 #endif
  99
 100 #ifdef DEBUG_BRINGUP
 101         bd_t *bip = (bd_t *) __res;
 102         printk("\n");
 103         printk("machine\t: %s\n", PPC4xx_MACHINE_NAME);
 104         printk("\n");
 105         printk("bi_s_version\t %s\n", bip->bi_s_version);
 106         printk("bi_r_version\t %s\n", bip->bi_r_version);
 107         printk("bi_memsize\t 0x%8.8x\t %dMBytes\n", bip->bi_memsize,
 108                bip->bi_memsize / (1024 * 1000));
 109         printk("bi_enetaddr %d\t %2.2x%2.2x%2.2x-%2.2x%2.2x%2.2x\n", 0,
 110                bip->bi_enetaddr[0], bip->bi_enetaddr[1], bip->bi_enetaddr[2],
 111                bip->bi_enetaddr[3], bip->bi_enetaddr[4], bip->bi_enetaddr[5]);
 112
 113         printk("bi_intfreq\t 0x%8.8x\t clock:\t %dMhz\n",
 114                bip->bi_intfreq, bip->bi_intfreq / 1000000);
 115
 116         printk("bi_busfreq\t 0x%8.8x\t plb bus clock:\t %dMHz\n",
 117                bip->bi_busfreq, bip->bi_busfreq / 1000000);
 118         printk("bi_tbfreq\t 0x%8.8x\t TB freq:\t %dMHz\n",
 119                bip->bi_tbfreq, bip->bi_tbfreq / 1000000);
 120
 121         printk("\n");
 122 #endif
 123
 124         /* Identify the system */
 125         printk(KERN_INFO "IBM Redwood6 (STBx25XX) Platform\n");
 126         printk(KERN_INFO
 127                "Port by MontaVista Software, Inc. (source@mvista.com)\n");
 128
 129         device_initcall(redwood6_platform_add_devices);
 130 }
 131
 132 void __init
 133 redwood6_map_io(void)
 134 {
 135         int i;
 136
 137         ppc4xx_map_io();
 138         for (i = 0; i < 16; i++) {
 139                 unsigned long v, p;
 140
 141                 /* 0x400x0000 -> 0xe00x0000 */
 142                 p = 0x40000000 | (i << 16);
 143                 v = STBx25xx_IO_BASE | (i << 16);
 144
 145                 io_block_mapping(v, p, PAGE_SIZE,
 146                                  _PAGE_NO_CACHE | pgprot_val(PAGE_KERNEL) |
 147                                  _PAGE_GUARDED);
 148         }
 149 }
 150
 151 void __init
 152 platform_init(unsigned long r3, unsigned long r4, unsigned long r5,
 153               unsigned long r6, unsigned long r7)
 154 {
 155         ppc4xx_init(r3, r4, r5, r6, r7);
 156
 157         ppc_md.setup_arch = redwood6_setup_arch;
 158         ppc_md.setup_io_mappings = redwood6_map_io;
 159 }