drivers/input/serio/i8042-sparcio.h

   1 #ifndef _I8042_SPARCIO_H
   2 #define _I8042_SPARCIO_H
   3
   4 #include <linux/of_device.h>
   5
   6 #include <asm/io.h>
   7 #include <asm/oplib.h>
   8 #include <asm/prom.h>
   9
  10 static int i8042_kbd_irq = -1;
  11 static int i8042_aux_irq = -1;
  12 #define I8042_KBD_IRQ i8042_kbd_irq
  13 #define I8042_AUX_IRQ i8042_aux_irq
  14
  15 #define I8042_KBD_PHYS_DESC "sparcps2/serio0"
  16 #define I8042_AUX_PHYS_DESC "sparcps2/serio1"
  17 #define I8042_MUX_PHYS_DESC "sparcps2/serio%d"
  18
  19 static void __iomem *kbd_iobase;
  20 static struct resource *kbd_res;
  21
  22 #define I8042_COMMAND_REG       (kbd_iobase + 0x64UL)
  23 #define I8042_DATA_REG          (kbd_iobase + 0x60UL)
  24
  25 static inline int i8042_read_data(void)
  26 {
  27         return readb(kbd_iobase + 0x60UL);
  28 }
  29
  30 static inline int i8042_read_status(void)
  31 {
  32         return readb(kbd_iobase + 0x64UL);
  33 }
  34
  35 static inline void i8042_write_data(int val)
  36 {
  37         writeb(val, kbd_iobase + 0x60UL);
  38 }
  39
  40 static inline void i8042_write_command(int val)
  41 {
  42         writeb(val, kbd_iobase + 0x64UL);
  43 }
  44
  45 #ifdef CONFIG_PCI
  46
  47 #define OBP_PS2KBD_NAME1        "kb_ps2"
  48 #define OBP_PS2KBD_NAME2        "keyboard"
  49 #define OBP_PS2MS_NAME1         "kdmouse"
  50 #define OBP_PS2MS_NAME2         "mouse"
  51
  52 static int __devinit sparc_i8042_probe(struct of_device *op, const struct of_device_id *match)
  53 {
  54         struct device_node *dp = op->dev.of_node;
  55
  56         dp = dp->child;
  57         while (dp) {
  58                 if (!strcmp(dp->name, OBP_PS2KBD_NAME1) ||
  59                     !strcmp(dp->name, OBP_PS2KBD_NAME2)) {
  60                         struct of_device *kbd = of_find_device_by_node(dp);
  61                         unsigned int irq = kbd->irqs[0];
  62                         if (irq == 0xffffffff)
  63                                 irq = op->irqs[0];
  64                         i8042_kbd_irq = irq;
  65                         kbd_iobase = of_ioremap(&kbd->resource[0],
  66                                                 0, 8, "kbd");
  67                         kbd_res = &kbd->resource[0];
  68                 } else if (!strcmp(dp->name, OBP_PS2MS_NAME1) ||
  69                            !strcmp(dp->name, OBP_PS2MS_NAME2)) {
  70                         struct of_device *ms = of_find_device_by_node(dp);
  71                         unsigned int irq = ms->irqs[0];
  72                         if (irq == 0xffffffff)
  73                                 irq = op->irqs[0];
  74                         i8042_aux_irq = irq;
  75                 }
  76
  77                 dp = dp->sibling;
  78         }
  79
  80         return 0;
  81 }
  82
  83 static int __devexit sparc_i8042_remove(struct of_device *op)
  84 {
  85         of_iounmap(kbd_res, kbd_iobase, 8);
  86
  87         return 0;
  88 }
  89
  90 static const struct of_device_id sparc_i8042_match[] = {
  91         {
  92                 .name = "8042",
  93         },
  94         {},
  95 };
  96 MODULE_DEVICE_TABLE(of, sparc_i8042_match);
  97
  98 static struct of_platform_driver sparc_i8042_driver = {
  99         .driver = {
 100                 .name = "i8042",
 101                 .owner = THIS_MODULE,
 102                 .of_match_table = sparc_i8042_match,
 103         },
 104         .probe          = sparc_i8042_probe,
 105         .remove         = __devexit_p(sparc_i8042_remove),
 106 };
 107
 108 static int __init i8042_platform_init(void)
 109 {
 110         struct device_node *root = of_find_node_by_path("/");
 111
 112         if (!strcmp(root->name, "SUNW,JavaStation-1")) {
 113                 /* Hardcoded values for MrCoffee.  */
 114                 i8042_kbd_irq = i8042_aux_irq = 13 | 0x20;
 115                 kbd_iobase = ioremap(0x71300060, 8);
 116                 if (!kbd_iobase)
 117                         return -ENODEV;
 118         } else {
 119                 int err = of_register_driver(&sparc_i8042_driver,
 120                                              &of_bus_type);
 121                 if (err)
 122                         return err;
 123
 124                 if (i8042_kbd_irq == -1 ||
 125                     i8042_aux_irq == -1) {
 126                         if (kbd_iobase) {
 127                                 of_iounmap(kbd_res, kbd_iobase, 8);
 128                                 kbd_iobase = (void __iomem *) NULL;
 129                         }
 130                         return -ENODEV;
 131                 }
 132         }
 133
 134         i8042_reset = 1;
 135
 136         return 0;
 137 }
 138
 139 static inline void i8042_platform_exit(void)
 140 {
 141         struct device_node *root = of_find_node_by_path("/");
 142
 143         if (strcmp(root->name, "SUNW,JavaStation-1"))
 144                 of_unregister_driver(&sparc_i8042_driver);
 145 }
 146
 147 #else /* !CONFIG_PCI */
 148 static int __init i8042_platform_init(void)
 149 {
 150         return -ENODEV;
 151 }
 152
 153 static inline void i8042_platform_exit(void)
 154 {
 155 }
 156 #endif /* !CONFIG_PCI */
 157
 158 #endif /* _I8042_SPARCIO_H */