LXR linux/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
  11static int i8042_kbd_irq = -1;
  12static 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
  20static void __iomem *kbd_iobase;
  21
  22#define I8042_COMMAND_REG       (kbd_iobase + 0x64UL)
  23#define I8042_DATA_REG          (kbd_iobase + 0x60UL)
  24
  25static inline int i8042_read_data(void)
  26{
  27        return readb(kbd_iobase + 0x60UL);
  28}
  29
  30static inline int i8042_read_status(void)
  31{
  32        return readb(kbd_iobase + 0x64UL);
  33}
  34
  35static inline void i8042_write_data(int val)
  36{
  37        writeb(val, kbd_iobase + 0x60UL);
  38}
  39
  40static inline void i8042_write_command(int val)
  41{
  42        writeb(val, kbd_iobase + 0x64UL);
  43}
  44
  45#ifdef CONFIG_PCI
  46
  47static 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
  54static 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
  85static int sparc_i8042_remove(struct platform_device *op)
  86{
  87        of_iounmap(kbd_res, kbd_iobase, 8);
  88
  89        return 0;
  90}
  91
  92static const struct of_device_id sparc_i8042_match[] = {
  93        {
  94                .name = "8042",
  95        },
  96        {},
  97};
  98MODULE_DEVICE_TABLE(of, sparc_i8042_match);
  99
 100static 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
 109static 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
 139static 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 */
 148static int __init i8042_platform_init(void)
 149{
 150        return -ENODEV;
 151}
 152
 153static inline void i8042_platform_exit(void)
 154{
 155}
 156#endif /* !CONFIG_PCI */
 157
 158#endif /* _I8042_SPARCIO_H */
 159