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 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 bool i8042_is_mr_coffee(void)
 110 {
 111         struct device_node *root;
 112         const char *name;
 113         bool is_mr_coffee;
 114
 115         root = of_find_node_by_path("/");
 116
 117         name = of_get_property(root, "name", NULL);
 118         is_mr_coffee = name && !strcmp(name, "SUNW,JavaStation-1");
 119
 120         of_node_put(root);
 121
 122         return is_mr_coffee;
 123 }
 124
 125 static int __init i8042_platform_init(void)
 126 {
 127         if (i8042_is_mr_coffee()) {
 128                 /* Hardcoded values for MrCoffee.  */
 129                 i8042_kbd_irq = i8042_aux_irq = 13 | 0x20;
 130                 kbd_iobase = ioremap(0x71300060, 8);
 131                 if (!kbd_iobase)
 132                         return -ENODEV;
 133         } else {
 134                 int err = platform_driver_register(&sparc_i8042_driver);
 135                 if (err)
 136                         return err;
 137
 138                 if (i8042_kbd_irq == -1 ||
 139                     i8042_aux_irq == -1) {
 140                         if (kbd_iobase) {
 141                                 of_iounmap(kbd_res, kbd_iobase, 8);
 142                                 kbd_iobase = (void __iomem *) NULL;
 143                         }
 144                         return -ENODEV;
 145                 }
 146         }
 147
 148         i8042_reset = I8042_RESET_ALWAYS;
 149
 150         return 0;
 151 }
 152
 153 static inline void i8042_platform_exit(void)
 154 {
 155         if (!i8042_is_mr_coffee())
 156                 platform_driver_unregister(&sparc_i8042_driver);
 157 }
 158
 159 #else /* !CONFIG_PCI */
 160 static int __init i8042_platform_init(void)
 161 {
 162         return -ENODEV;
 163 }
 164
 165 static inline void i8042_platform_exit(void)
 166 {
 167 }
 168 #endif /* !CONFIG_PCI */
 169
 170 #endif /* _I8042_SPARCIO_H */