drivers/input/serio/i8042-sparcio.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 #ifndef _I8042_SPARCIO_H
   3 #define _I8042_SPARCIO_H
   4
   5 #include <linux/of_device.h>
   6
   7 #include <asm/io.h>
   8 #include <asm/oplib.h>
   9 #include <asm/prom.h>
  10
  11 static int i8042_kbd_irq = -1;
  12 static int i8042_aux_irq = -1;
  13 #define I8042_KBD_IRQ i8042_kbd_irq
  14 #define I8042_AUX_IRQ i8042_aux_irq
  15
  16 #define I8042_KBD_PHYS_DESC "sparcps2/serio0"
  17 #define I8042_AUX_PHYS_DESC "sparcps2/serio1"
  18 #define I8042_MUX_PHYS_DESC "sparcps2/serio%d"
  19
  20 static void __iomem *kbd_iobase;
  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 static struct resource *kbd_res;
  48
  49 #define OBP_PS2KBD_NAME1        "kb_ps2"
  50 #define OBP_PS2KBD_NAME2        "keyboard"
  51 #define OBP_PS2MS_NAME1         "kdmouse"
  52 #define OBP_PS2MS_NAME2         "mouse"
  53
  54 static int sparc_i8042_probe(struct platform_device *op)
  55 {
  56         struct device_node *dp = op->dev.of_node;
  57
  58         dp = dp->child;
  59         while (dp) {
  60                 if (!strcmp(dp->name, OBP_PS2KBD_NAME1) ||
  61                     !strcmp(dp->name, OBP_PS2KBD_NAME2)) {
  62                         struct platform_device *kbd = of_find_device_by_node(dp);
  63                         unsigned int irq = kbd->archdata.irqs[0];
  64                         if (irq == 0xffffffff)
  65                                 irq = op->archdata.irqs[0];
  66                         i8042_kbd_irq = irq;
  67                         kbd_iobase = of_ioremap(&kbd->resource[0],
  68                                                 0, 8, "kbd");
  69                         kbd_res = &kbd->resource[0];
  70                 } else if (!strcmp(dp->name, OBP_PS2MS_NAME1) ||
  71                            !strcmp(dp->name, OBP_PS2MS_NAME2)) {
  72                         struct platform_device *ms = of_find_device_by_node(dp);
  73                         unsigned int irq = ms->archdata.irqs[0];
  74                         if (irq == 0xffffffff)
  75                                 irq = op->archdata.irqs[0];
  76                         i8042_aux_irq = irq;
  77                 }
  78
  79                 dp = dp->sibling;
  80         }
  81
  82         return 0;
  83 }
  84
  85 static int sparc_i8042_remove(struct platform_device *op)
  86 {
  87         of_iounmap(kbd_res, kbd_iobase, 8);
  88
  89         return 0;
  90 }
  91
  92 static const struct of_device_id sparc_i8042_match[] = {
  93         {
  94                 .name = "8042",
  95         },
  96         {},
  97 };
  98 MODULE_DEVICE_TABLE(of, sparc_i8042_match);
  99
 100 static struct platform_driver sparc_i8042_driver = {
 101         .driver = {
 102                 .name = "i8042",
 103                 .of_match_table = sparc_i8042_match,
 104         },
 105         .probe          = sparc_i8042_probe,
 106         .remove         = sparc_i8042_remove,
 107 };
 108
 109 static int __init i8042_platform_init(void)
 110 {
 111         struct device_node *root = of_find_node_by_path("/");
 112
 113         if (!strcmp(root->name, "SUNW,JavaStation-1")) {
 114                 /* Hardcoded values for MrCoffee.  */
 115                 i8042_kbd_irq = i8042_aux_irq = 13 | 0x20;
 116                 kbd_iobase = ioremap(0x71300060, 8);
 117                 if (!kbd_iobase)
 118                         return -ENODEV;
 119         } else {
 120                 int err = platform_driver_register(&sparc_i8042_driver);
 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 = I8042_RESET_ALWAYS;
 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                 platform_driver_unregister(&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 */