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.h>
   6 #include <linux/of_platform.h>
   7 #include <linux/platform_device.h>
   8 #include <linux/types.h>
   9
  10 #include <asm/io.h>
  11 #include <asm/oplib.h>
  12 #include <asm/prom.h>
  13
  14 static int i8042_kbd_irq = -1;
  15 static int i8042_aux_irq = -1;
  16 #define I8042_KBD_IRQ i8042_kbd_irq
  17 #define I8042_AUX_IRQ i8042_aux_irq
  18
  19 #define I8042_KBD_PHYS_DESC "sparcps2/serio0"
  20 #define I8042_AUX_PHYS_DESC "sparcps2/serio1"
  21 #define I8042_MUX_PHYS_DESC "sparcps2/serio%d"
  22
  23 static void __iomem *kbd_iobase;
  24
  25 #define I8042_COMMAND_REG       (kbd_iobase + 0x64UL)
  26 #define I8042_DATA_REG          (kbd_iobase + 0x60UL)
  27
  28 static inline int i8042_read_data(void)
  29 {
  30         return readb(kbd_iobase + 0x60UL);
  31 }
  32
  33 static inline int i8042_read_status(void)
  34 {
  35         return readb(kbd_iobase + 0x64UL);
  36 }
  37
  38 static inline void i8042_write_data(int val)
  39 {
  40         writeb(val, kbd_iobase + 0x60UL);
  41 }
  42
  43 static inline void i8042_write_command(int val)
  44 {
  45         writeb(val, kbd_iobase + 0x64UL);
  46 }
  47
  48 #ifdef CONFIG_PCI
  49
  50 static struct resource *kbd_res;
  51
  52 #define OBP_PS2KBD_NAME1        "kb_ps2"
  53 #define OBP_PS2KBD_NAME2        "keyboard"
  54 #define OBP_PS2MS_NAME1         "kdmouse"
  55 #define OBP_PS2MS_NAME2         "mouse"
  56
  57 static int sparc_i8042_probe(struct platform_device *op)
  58 {
  59         struct device_node *dp;
  60
  61         for_each_child_of_node(op->dev.of_node, dp) {
  62                 if (of_node_name_eq(dp, OBP_PS2KBD_NAME1) ||
  63                     of_node_name_eq(dp, OBP_PS2KBD_NAME2)) {
  64                         struct platform_device *kbd = of_find_device_by_node(dp);
  65                         unsigned int irq = kbd->archdata.irqs[0];
  66                         if (irq == 0xffffffff)
  67                                 irq = op->archdata.irqs[0];
  68                         i8042_kbd_irq = irq;
  69                         kbd_iobase = of_ioremap(&kbd->resource[0],
  70                                                 0, 8, "kbd");
  71                         kbd_res = &kbd->resource[0];
  72                 } else if (of_node_name_eq(dp, OBP_PS2MS_NAME1) ||
  73                            of_node_name_eq(dp, OBP_PS2MS_NAME2)) {
  74                         struct platform_device *ms = of_find_device_by_node(dp);
  75                         unsigned int irq = ms->archdata.irqs[0];
  76                         if (irq == 0xffffffff)
  77                                 irq = op->archdata.irqs[0];
  78                         i8042_aux_irq = irq;
  79                 }
  80         }
  81
  82         return 0;
  83 }
  84
  85 static void sparc_i8042_remove(struct platform_device *op)
  86 {
  87         of_iounmap(kbd_res, kbd_iobase, 8);
  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 __free(device_node) = of_find_node_by_path("/");
 110         const char *name = of_get_property(root, "name", NULL);
 111
 112         return name && !strcmp(name, "SUNW,JavaStation-1");
 113 }
 114
 115 static int __init i8042_platform_init(void)
 116 {
 117         if (i8042_is_mr_coffee()) {
 118                 /* Hardcoded values for MrCoffee.  */
 119                 i8042_kbd_irq = i8042_aux_irq = 13 | 0x20;
 120                 kbd_iobase = ioremap(0x71300060, 8);
 121                 if (!kbd_iobase)
 122                         return -ENODEV;
 123         } else {
 124                 int err = platform_driver_register(&sparc_i8042_driver);
 125                 if (err)
 126                         return err;
 127
 128                 if (i8042_kbd_irq == -1 ||
 129                     i8042_aux_irq == -1) {
 130                         if (kbd_iobase) {
 131                                 of_iounmap(kbd_res, kbd_iobase, 8);
 132                                 kbd_iobase = (void __iomem *) NULL;
 133                         }
 134                         return -ENODEV;
 135                 }
 136         }
 137
 138         i8042_reset = I8042_RESET_ALWAYS;
 139
 140         return 0;
 141 }
 142
 143 static inline void i8042_platform_exit(void)
 144 {
 145         if (!i8042_is_mr_coffee())
 146                 platform_driver_unregister(&sparc_i8042_driver);
 147 }
 148
 149 #else /* !CONFIG_PCI */
 150 static int __init i8042_platform_init(void)
 151 {
 152         return -ENODEV;
 153 }
 154
 155 static inline void i8042_platform_exit(void)
 156 {
 157 }
 158 #endif /* !CONFIG_PCI */
 159
 160 #endif /* _I8042_SPARCIO_H */