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 #include <linux/types.h>
   7
   8 #include <asm/io.h>
   9 #include <asm/oplib.h>
  10 #include <asm/prom.h>
  11
  12 static int i8042_kbd_irq = -1;
  13 static int i8042_aux_irq = -1;
  14 #define I8042_KBD_IRQ i8042_kbd_irq
  15 #define I8042_AUX_IRQ i8042_aux_irq
  16
  17 #define I8042_KBD_PHYS_DESC "sparcps2/serio0"
  18 #define I8042_AUX_PHYS_DESC "sparcps2/serio1"
  19 #define I8042_MUX_PHYS_DESC "sparcps2/serio%d"
  20
  21 static void __iomem *kbd_iobase;
  22
  23 #define I8042_COMMAND_REG       (kbd_iobase + 0x64UL)
  24 #define I8042_DATA_REG          (kbd_iobase + 0x60UL)
  25
  26 static inline int i8042_read_data(void)
  27 {
  28         return readb(kbd_iobase + 0x60UL);
  29 }
  30
  31 static inline int i8042_read_status(void)
  32 {
  33         return readb(kbd_iobase + 0x64UL);
  34 }
  35
  36 static inline void i8042_write_data(int val)
  37 {
  38         writeb(val, kbd_iobase + 0x60UL);
  39 }
  40
  41 static inline void i8042_write_command(int val)
  42 {
  43         writeb(val, kbd_iobase + 0x64UL);
  44 }
  45
  46 #ifdef CONFIG_PCI
  47
  48 static struct resource *kbd_res;
  49
  50 #define OBP_PS2KBD_NAME1        "kb_ps2"
  51 #define OBP_PS2KBD_NAME2        "keyboard"
  52 #define OBP_PS2MS_NAME1         "kdmouse"
  53 #define OBP_PS2MS_NAME2         "mouse"
  54
  55 static int sparc_i8042_probe(struct platform_device *op)
  56 {
  57         struct device_node *dp;
  58
  59         for_each_child_of_node(op->dev.of_node, dp) {
  60                 if (of_node_name_eq(dp, OBP_PS2KBD_NAME1) ||
  61                     of_node_name_eq(dp, 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 (of_node_name_eq(dp, OBP_PS2MS_NAME1) ||
  71                            of_node_name_eq(dp, 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
  80         return 0;
  81 }
  82
  83 static int sparc_i8042_remove(struct platform_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 platform_driver sparc_i8042_driver = {
  99         .driver = {
 100                 .name = "i8042",
 101                 .of_match_table = sparc_i8042_match,
 102         },
 103         .probe          = sparc_i8042_probe,
 104         .remove         = sparc_i8042_remove,
 105 };
 106
 107 static bool i8042_is_mr_coffee(void)
 108 {
 109         struct device_node *root;
 110         const char *name;
 111         bool is_mr_coffee;
 112
 113         root = of_find_node_by_path("/");
 114
 115         name = of_get_property(root, "name", NULL);
 116         is_mr_coffee = name && !strcmp(name, "SUNW,JavaStation-1");
 117
 118         of_node_put(root);
 119
 120         return is_mr_coffee;
 121 }
 122
 123 static int __init i8042_platform_init(void)
 124 {
 125         if (i8042_is_mr_coffee()) {
 126                 /* Hardcoded values for MrCoffee.  */
 127                 i8042_kbd_irq = i8042_aux_irq = 13 | 0x20;
 128                 kbd_iobase = ioremap(0x71300060, 8);
 129                 if (!kbd_iobase)
 130                         return -ENODEV;
 131         } else {
 132                 int err = platform_driver_register(&sparc_i8042_driver);
 133                 if (err)
 134                         return err;
 135
 136                 if (i8042_kbd_irq == -1 ||
 137                     i8042_aux_irq == -1) {
 138                         if (kbd_iobase) {
 139                                 of_iounmap(kbd_res, kbd_iobase, 8);
 140                                 kbd_iobase = (void __iomem *) NULL;
 141                         }
 142                         return -ENODEV;
 143                 }
 144         }
 145
 146         i8042_reset = I8042_RESET_ALWAYS;
 147
 148         return 0;
 149 }
 150
 151 static inline void i8042_platform_exit(void)
 152 {
 153         if (!i8042_is_mr_coffee())
 154                 platform_driver_unregister(&sparc_i8042_driver);
 155 }
 156
 157 #else /* !CONFIG_PCI */
 158 static int __init i8042_platform_init(void)
 159 {
 160         return -ENODEV;
 161 }
 162
 163 static inline void i8042_platform_exit(void)
 164 {
 165 }
 166 #endif /* !CONFIG_PCI */
 167
 168 #endif /* _I8042_SPARCIO_H */