openwrt/target/linux/package/diag/src/diag.h

   1 /*
   2  * diag.h - GPIO interface driver for Broadcom boards
   3  *
   4  * Copyright (C) 2006 Mike Baker <mbm@openwrt.org>,
   5  *                    Felix Fietkau <nbd@openwrt.org>
   6  *
   7  * This program is free software; you can redistribute it and/or
   8  * modify it under the terms of the GNU General Public License
   9  * as published by the Free Software Foundation; either version 2
  10  * of the License, or (at your option) any later version.
  11  *
  12  * This program is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  * GNU General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU General Public License
  18  * along with this program; if not, write to the Free Software
  19  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
  20  *
  21  * $Id:$
  22  */
  23
  24 #define MODULE_NAME "diag"
  25
  26 #define MAX_GPIO 8
  27 #define FLASH_TIME HZ/6
  28
  29 enum polarity_t {
  30         REVERSE = 0,
  31         NORMAL = 1,
  32 };
  33
  34 enum {
  35         PROC_BUTTON,
  36         PROC_LED,
  37         PROC_MODEL,
  38         PROC_GPIOMASK
  39 };
  40
  41 struct prochandler_t {
  42         int type;
  43         void *ptr;
  44 };
  45
  46 struct button_t {
  47         struct prochandler_t proc;
  48         char *name;
  49         u32 gpio;
  50         unsigned long seen;
  51         u8 pressed;
  52 };
  53
  54 struct led_t {
  55         struct prochandler_t proc;
  56         char *name;
  57         u32 gpio;
  58         u8 polarity;
  59         u8 flash;
  60         u8 state;
  61 };
  62
  63 struct platform_t {
  64         char *name;
  65
  66         struct button_t buttons[MAX_GPIO];
  67         u32 button_mask;
  68         u32 button_polarity;
  69
  70         struct led_t leds[MAX_GPIO];
  71 };
  72
  73 struct event_t {
  74         struct tq_struct tq;
  75         char buf[256];
  76         char *argv[3];
  77         char *envp[6];
  78 };
  79
  80 #define sbh bcm947xx_sbh
  81 #define sbh_lock bcm947xx_sbh_lock
  82
  83 extern void *bcm947xx_sbh;
  84 extern spinlock_t bcm947xx_sbh_lock;
  85 extern char *nvram_get(char *str);
  86
  87 static struct platform_t platform;
  88
  89 /* buttons */
  90
  91 static void set_irqenable(int enabled);
  92
  93 static void register_buttons(struct button_t *b);
  94 static void unregister_buttons(struct button_t *b);
  95
  96 static void hotplug_button(struct event_t *event);
  97 static void button_handler(int irq, void *dev_id, struct pt_regs *regs);
  98
  99 /* leds */
 100
 101 static void register_leds(struct led_t *l);
 102 static void unregister_leds(struct led_t *l);
 103
 104 #define EXTIF_ADDR 0x1f000000
 105 #define EXTIF_UART (EXTIF_ADDR + 0x00800000)
 106
 107 #define GPIO_TYPE_NORMAL        (0x0 << 24)
 108 #define GPIO_TYPE_EXTIF         (0x1 << 24)
 109 #define GPIO_TYPE_MASK          (0xf << 24)
 110
 111 static void set_led_extif(struct led_t *led);
 112 static void led_flash(unsigned long dummy);
 113
 114 static struct timer_list led_timer = {
 115         function: &led_flash
 116 };
 117
 118 /* proc */
 119
 120 static struct proc_dir_entry *diag, *leds;
 121
 122 static ssize_t diag_proc_read(struct file *file, char *buf, size_t count, loff_t *ppos);
 123 static ssize_t diag_proc_write(struct file *file, const char *buf, size_t count, void *data);
 124
 125 static struct file_operations diag_proc_fops = {
 126         read: diag_proc_read,
 127         write: diag_proc_write
 128 };
 129
 130 static struct prochandler_t proc_model = { .type = PROC_MODEL };
 131 static struct prochandler_t proc_gpiomask = { .type = PROC_GPIOMASK };
 132
 133 /* TODO: export existing sb_irq instead */
 134 static int sb_irq(void *sbh)
 135 {
 136         uint idx;
 137         void *regs;
 138         sbconfig_t *sb;
 139         uint32 flag, sbipsflag;
 140         uint irq = 0;
 141
 142         regs = sb_coreregs(sbh);
 143         sb = (sbconfig_t *)((ulong) regs + SBCONFIGOFF);
 144         flag = (R_REG(&sb->sbtpsflag) & SBTPS_NUM0_MASK);
 145
 146         idx = sb_coreidx(sbh);
 147
 148         if ((regs = sb_setcore(sbh, SB_MIPS, 0)) ||
 149             (regs = sb_setcore(sbh, SB_MIPS33, 0))) {
 150                 sb = (sbconfig_t *)((ulong) regs + SBCONFIGOFF);
 151
 152                 /* sbipsflag specifies which core is routed to interrupts 1 to 4 */
 153                 sbipsflag = R_REG(&sb->sbipsflag);
 154                 for (irq = 1; irq <= 4; irq++, sbipsflag >>= 8) {
 155                         if ((sbipsflag & 0x3f) == flag)
 156                                 break;
 157                 }
 158                 if (irq == 5)
 159                         irq = 0;
 160         }
 161
 162         sb_setcoreidx(sbh, idx);
 163
 164         return irq;
 165 }