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 <asm/io.h>
  16 #include <asm/ppc4xx_pic.h>
  17 #include <linux/delay.h>
  18 #include <asm/machdep.h>
  19
  20
  21 /*
  22  * Define all of the IRQ senses and polarities.
  23  */
  24
  25 static u_char redwood6_IRQ_initsenses[] __initdata = {
  26         (IRQ_SENSE_LEVEL | IRQ_POLARITY_POSITIVE),      /* 0: RTC/FPC */
  27         (IRQ_SENSE_LEVEL | IRQ_POLARITY_POSITIVE),      /* 1: Transport */
  28         (IRQ_SENSE_LEVEL | IRQ_POLARITY_POSITIVE),      /* 2: Audio Dec */
  29         (IRQ_SENSE_LEVEL | IRQ_POLARITY_POSITIVE),      /* 3: Video Dec */
  30         (IRQ_SENSE_LEVEL | IRQ_POLARITY_POSITIVE),      /* 4: DMA Chan 0 */
  31         (IRQ_SENSE_LEVEL | IRQ_POLARITY_POSITIVE),      /* 5: DMA Chan 1 */
  32         (IRQ_SENSE_LEVEL | IRQ_POLARITY_POSITIVE),      /* 6: DMA Chan 2 */
  33         (IRQ_SENSE_LEVEL | IRQ_POLARITY_POSITIVE),      /* 7: DMA Chan 3 */
  34         (IRQ_SENSE_LEVEL | IRQ_POLARITY_POSITIVE),      /* 8: SmartCard 0 */
  35         (IRQ_SENSE_LEVEL | IRQ_POLARITY_POSITIVE),      /* 9: IIC0 */
  36         (IRQ_SENSE_LEVEL | IRQ_POLARITY_POSITIVE),      /* 10: IRR */
  37         (IRQ_SENSE_LEVEL | IRQ_POLARITY_POSITIVE),      /* 11: Cap Timers */
  38         (IRQ_SENSE_LEVEL | IRQ_POLARITY_POSITIVE),      /* 12: Cmp Timers */
  39         (IRQ_SENSE_LEVEL | IRQ_POLARITY_POSITIVE),      /* 13: Serial Port */
  40         (IRQ_SENSE_LEVEL | IRQ_POLARITY_POSITIVE),      /* 14: Soft Modem */
  41         (IRQ_SENSE_LEVEL | IRQ_POLARITY_POSITIVE),      /* 15: Down Ctrs */
  42         (IRQ_SENSE_LEVEL | IRQ_POLARITY_POSITIVE),      /* 16: SmartCard 1 */
  43         (IRQ_SENSE_LEVEL | IRQ_POLARITY_NEGATIVE),      /* 17: Ext Int 7 */
  44         (IRQ_SENSE_LEVEL | IRQ_POLARITY_NEGATIVE),      /* 18: Ext Int 8 */
  45         (IRQ_SENSE_LEVEL | IRQ_POLARITY_NEGATIVE),      /* 19: Ext Int 9 */
  46         (IRQ_SENSE_LEVEL | IRQ_POLARITY_POSITIVE),      /* 20: Serial 0 */
  47         (IRQ_SENSE_LEVEL | IRQ_POLARITY_POSITIVE),      /* 21: Serial 1 */
  48         (IRQ_SENSE_LEVEL | IRQ_POLARITY_POSITIVE),      /* 22: Serial 2 */
  49         (IRQ_SENSE_LEVEL | IRQ_POLARITY_POSITIVE),      /* 23: XPT_DMA */
  50         (IRQ_SENSE_LEVEL | IRQ_POLARITY_POSITIVE),      /* 24: DCR timeout */
  51         (IRQ_SENSE_LEVEL | IRQ_POLARITY_NEGATIVE),      /* 25: Ext Int 0 */
  52         (IRQ_SENSE_LEVEL | IRQ_POLARITY_NEGATIVE),      /* 26: Ext Int 1 */
  53         (IRQ_SENSE_LEVEL | IRQ_POLARITY_NEGATIVE),      /* 27: Ext Int 2 */
  54         (IRQ_SENSE_LEVEL | IRQ_POLARITY_NEGATIVE),      /* 28: Ext Int 3 */
  55         (IRQ_SENSE_LEVEL | IRQ_POLARITY_NEGATIVE),      /* 29: Ext Int 4 */
  56         (IRQ_SENSE_LEVEL | IRQ_POLARITY_NEGATIVE),      /* 30: Ext Int 5 */
  57         (IRQ_SENSE_LEVEL | IRQ_POLARITY_NEGATIVE),      /* 31: Ext Int 6 */
  58 };
  59
  60
  61 void __init
  62 redwood6_setup_arch(void)
  63 {
  64 #ifdef CONFIG_IDE
  65         void *xilinx, *xilinx_1, *xilinx_2;
  66         unsigned short us_reg5;
  67 #endif
  68
  69         ppc4xx_setup_arch();
  70
  71 #ifdef CONFIG_IDE
  72         xilinx = (unsigned long) ioremap(IDE_XLINUX_MUX_BASE, 0x10);
  73         /* init xilinx control registers - enable ide mux, clear reset bit */
  74         if (!xilinx) {
  75                 printk(KERN_CRIT
  76                        "redwood6_setup_arch() xilinxi ioremap failed\n");
  77                 return;
  78         }
  79         xilinx_1 = xilinx + 0xa;
  80         xilinx_2 = xilinx + 0xe;
  81
  82         us_reg5 = readb(xilinx_1);
  83         writeb(0x01d1, xilinx_1);
  84         writeb(0x0008, xilinx_2);
  85
  86         udelay(10 * 1000);
  87
  88         writeb(0x01d1, xilinx_1);
  89         writeb(0x0008, xilinx_2);
  90 #endif
  91
  92 #ifdef DEBUG_BRINGUP
  93         bd_t *bip = (bd_t *) __res;
  94         printk("\n");
  95         printk("machine\t: %s\n", PPC4xx_MACHINE_NAME);
  96         printk("\n");
  97         printk("bi_s_version\t %s\n", bip->bi_s_version);
  98         printk("bi_r_version\t %s\n", bip->bi_r_version);
  99         printk("bi_memsize\t 0x%8.8x\t %dMBytes\n", bip->bi_memsize,
 100                bip->bi_memsize / (1024 * 1000));
 101         printk("bi_enetaddr %d\t %2.2x%2.2x%2.2x-%2.2x%2.2x%2.2x\n", 0,
 102                bip->bi_enetaddr[0], bip->bi_enetaddr[1], bip->bi_enetaddr[2],
 103                bip->bi_enetaddr[3], bip->bi_enetaddr[4], bip->bi_enetaddr[5]);
 104
 105         printk("bi_intfreq\t 0x%8.8x\t clock:\t %dMhz\n",
 106                bip->bi_intfreq, bip->bi_intfreq / 1000000);
 107
 108         printk("bi_busfreq\t 0x%8.8x\t plb bus clock:\t %dMHz\n",
 109                bip->bi_busfreq, bip->bi_busfreq / 1000000);
 110         printk("bi_tbfreq\t 0x%8.8x\t TB freq:\t %dMHz\n",
 111                bip->bi_tbfreq, bip->bi_tbfreq / 1000000);
 112
 113         printk("\n");
 114 #endif
 115         ibm4xxPIC_InitSenses = redwood6_IRQ_initsenses;
 116         ibm4xxPIC_NumInitSenses = sizeof(redwood6_IRQ_initsenses);
 117
 118         /* Identify the system */
 119         printk(KERN_INFO "IBM Redwood6 (STBx25XX) Platform\n");
 120         printk(KERN_INFO
 121                "Port by MontaVista Software, Inc. (source@mvista.com)\n");
 122 }
 123
 124 void __init
 125 redwood6_map_io(void)
 126 {
 127         int i;
 128
 129         ppc4xx_map_io();
 130         for (i = 0; i < 16; i++) {
 131                 unsigned long v, p;
 132
 133                 /* 0x400x0000 -> 0xe00x0000 */
 134                 p = 0x40000000 | (i << 16);
 135                 v = STBx25xx_IO_BASE | (i << 16);
 136
 137                 io_block_mapping(v, p, PAGE_SIZE,
 138                                  _PAGE_NO_CACHE | pgprot_val(PAGE_KERNEL) |
 139                                  _PAGE_GUARDED);
 140         }
 141 }
 142
 143 void __init
 144 platform_init(unsigned long r3, unsigned long r4, unsigned long r5,
 145               unsigned long r6, unsigned long r7)
 146 {
 147         ppc4xx_init(r3, r4, r5, r6, r7);
 148
 149         ppc_md.setup_arch = redwood6_setup_arch;
 150         ppc_md.setup_io_mappings = redwood6_map_io;
 151 }