arch/v850/kernel/rte_cb.c

   1 /*
   2  * include/asm-v850/rte_cb.c -- Midas lab RTE-CB series of evaluation boards
   3  *
   4  *  Copyright (C) 2001,02,03  NEC Electronics Corporation
   5  *  Copyright (C) 2001,02,03  Miles Bader <miles@gnu.org>
   6  *
   7  * This file is subject to the terms and conditions of the GNU General
   8  * Public License.  See the file COPYING in the main directory of this
   9  * archive for more details.
  10  *
  11  * Written by Miles Bader <miles@gnu.org>
  12  */
  13
  14 #include <linux/init.h>
  15 #include <linux/irq.h>
  16 #include <linux/fs.h>
  17 #include <linux/module.h>
  18
  19 #include <asm/machdep.h>
  20 #include <asm/v850e_uart.h>
  21
  22 #include "mach.h"
  23
  24 static void led_tick (void);
  25
  26 /* LED access routines.  */
  27 extern unsigned read_leds (int pos, char *buf, int len);
  28 extern unsigned write_leds (int pos, const char *buf, int len);
  29
  30 #ifdef CONFIG_RTE_CB_MULTI
  31 extern void multi_init (void);
  32 #endif
  33
  34 \f
  35 void __init rte_cb_early_init (void)
  36 {
  37         v850e_intc_disable_irqs ();
  38
  39 #ifdef CONFIG_RTE_CB_MULTI
  40         multi_init ();
  41 #endif
  42 }
  43
  44 void __init mach_setup (char **cmdline)
  45 {
  46 #ifdef CONFIG_RTE_MB_A_PCI
  47         /* Probe for Mother-A, and print a message if we find it.  */
  48         *(volatile unsigned long *)MB_A_SRAM_ADDR = 0xDEADBEEF;
  49         if (*(volatile unsigned long *)MB_A_SRAM_ADDR == 0xDEADBEEF) {
  50                 *(volatile unsigned long *)MB_A_SRAM_ADDR = 0x12345678;
  51                 if (*(volatile unsigned long *)MB_A_SRAM_ADDR == 0x12345678)
  52                         printk (KERN_INFO
  53                                 "          NEC SolutionGear/Midas lab"
  54                                 " RTE-MOTHER-A motherboard\n");
  55         }
  56 #endif /* CONFIG_RTE_MB_A_PCI */
  57
  58         mach_tick = led_tick;
  59 }
  60
  61 void machine_restart (char *__unused)
  62 {
  63 #ifdef CONFIG_RESET_GUARD
  64         disable_reset_guard ();
  65 #endif
  66         asm ("jmp r0"); /* Jump to the reset vector.  */
  67 }
  68
  69 /* This says `HALt.' in LEDese.  */
  70 static unsigned char halt_leds_msg[] = { 0x76, 0x77, 0x38, 0xF8 };
  71
  72 void machine_halt (void)
  73 {
  74 #ifdef CONFIG_RESET_GUARD
  75         disable_reset_guard ();
  76 #endif
  77
  78         /* Ignore all interrupts.  */
  79         local_irq_disable ();
  80
  81         /* Write a little message.  */
  82         write_leds (0, halt_leds_msg, sizeof halt_leds_msg);
  83
  84         /* Really halt.  */
  85         for (;;)
  86                 asm ("halt; nop; nop; nop; nop; nop");
  87 }
  88
  89 void machine_power_off (void)
  90 {
  91         machine_halt ();
  92 }
  93
  94 \f
  95 /* Animated LED display for timer tick.  */
  96
  97 #define TICK_UPD_FREQ   6
  98 static int tick_frames[][10] = {
  99         { 0x01, 0x02, 0x04, 0x08, 0x10, 0x20, -1 },
 100         { 0x63, 0x5c, -1 },
 101         { 0x5c, 0x00, -1 },
 102         { 0x63, 0x00, -1 },
 103         { -1 }
 104 };
 105
 106 static void led_tick ()
 107 {
 108         static unsigned counter = 0;
 109
 110         if (++counter == (HZ / TICK_UPD_FREQ)) {
 111                 /* Which frame we're currently displaying for each digit.  */
 112                 static unsigned frame_nums[LED_NUM_DIGITS] = { 0 };
 113                 /* Display image.  */
 114                 static unsigned char image[LED_NUM_DIGITS] = { 0 };
 115                 unsigned char prev_image[LED_NUM_DIGITS];
 116                 int write_to_leds = 1; /* true if we should actually display */
 117                 int digit;
 118
 119                 /* We check to see if the physical LEDs contains what we last
 120                    wrote to them; if not, we suppress display (this is so that
 121                    users can write to the LEDs, and not have their output
 122                    overwritten).  As a special case, we start writing again if
 123                    all the LEDs are blank, or our display image is all zeros
 124                    (indicating that this is the initial update, when the actual
 125                    LEDs might contain random data).  */
 126                 read_leds (0, prev_image, LED_NUM_DIGITS);
 127                 for (digit = 0; digit < LED_NUM_DIGITS; digit++)
 128                         if (image[digit] != prev_image[digit]
 129                             && image[digit] && prev_image[digit])
 130                         {
 131                                 write_to_leds = 0;
 132                                 break;
 133                         }
 134
 135                 /* Update display image.  */
 136                 for (digit = 0;
 137                      digit < LED_NUM_DIGITS && tick_frames[digit][0] >= 0;
 138                      digit++)
 139                 {
 140                         int frame = tick_frames[digit][frame_nums[digit]];
 141                         if (frame < 0) {
 142                                 image[digit] = tick_frames[digit][0];
 143                                 frame_nums[digit] = 1;
 144                         } else {
 145                                 image[digit] = frame;
 146                                 frame_nums[digit]++;
 147                                 break;
 148                         }
 149                 }
 150
 151                 if (write_to_leds)
 152                         /* Write the display image to the physical LEDs.  */
 153                         write_leds (0, image, LED_NUM_DIGITS);
 154
 155                 counter = 0;
 156         }
 157 }
 158
 159 \f
 160 /* Mother-A interrupts.  */
 161
 162 #ifdef CONFIG_RTE_GBUS_INT
 163
 164 #define L GBUS_INT_PRIORITY_LOW
 165 #define M GBUS_INT_PRIORITY_MEDIUM
 166 #define H GBUS_INT_PRIORITY_HIGH
 167
 168 static struct gbus_int_irq_init gbus_irq_inits[] = {
 169 #ifdef CONFIG_RTE_MB_A_PCI
 170         { "MB_A_LAN",   IRQ_MB_A_LAN,           1,                   1, L },
 171         { "MB_A_PCI1",  IRQ_MB_A_PCI1(0),       IRQ_MB_A_PCI1_NUM,   1, L },
 172         { "MB_A_PCI2",  IRQ_MB_A_PCI2(0),       IRQ_MB_A_PCI2_NUM,   1, L },
 173         { "MB_A_EXT",   IRQ_MB_A_EXT(0),        IRQ_MB_A_EXT_NUM,    1, L },
 174         { "MB_A_USB_OC",IRQ_MB_A_USB_OC(0),     IRQ_MB_A_USB_OC_NUM, 1, L },
 175         { "MB_A_PCMCIA_OC",IRQ_MB_A_PCMCIA_OC,  1,                   1, L },
 176 #endif
 177         { 0 }
 178 };
 179 #define NUM_GBUS_IRQ_INITS  \
 180    ((sizeof gbus_irq_inits / sizeof gbus_irq_inits[0]) - 1)
 181
 182 static struct hw_interrupt_type gbus_hw_itypes[NUM_GBUS_IRQ_INITS];
 183
 184 #endif /* CONFIG_RTE_GBUS_INT */
 185
 186
 187 void __init rte_cb_init_irqs (void)
 188 {
 189 #ifdef CONFIG_RTE_GBUS_INT
 190         gbus_int_init_irqs ();
 191         gbus_int_init_irq_types (gbus_irq_inits, gbus_hw_itypes);
 192 #endif /* CONFIG_RTE_GBUS_INT */
 193 }