forked from Minki/linux
0b8f452c96
Convert string compares of DT node names to use of_node_name_eq helper instead. For the root node on SUN DT, we need to retrieve the 'name' property as it is the rare case where the 'name' property and node name differ. With both changes, it removes direct access to the node name pointer. While at it, convert the open coded loop to use for_each_child_of_node(). Signed-off-by: Rob Herring <robh@kernel.org> Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
158 lines
3.5 KiB
C
158 lines
3.5 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef _I8042_SPARCIO_H
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#define _I8042_SPARCIO_H
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#include <linux/of_device.h>
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#include <asm/io.h>
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#include <asm/oplib.h>
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#include <asm/prom.h>
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static int i8042_kbd_irq = -1;
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static int i8042_aux_irq = -1;
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#define I8042_KBD_IRQ i8042_kbd_irq
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#define I8042_AUX_IRQ i8042_aux_irq
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#define I8042_KBD_PHYS_DESC "sparcps2/serio0"
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#define I8042_AUX_PHYS_DESC "sparcps2/serio1"
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#define I8042_MUX_PHYS_DESC "sparcps2/serio%d"
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static void __iomem *kbd_iobase;
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#define I8042_COMMAND_REG (kbd_iobase + 0x64UL)
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#define I8042_DATA_REG (kbd_iobase + 0x60UL)
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static inline int i8042_read_data(void)
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{
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return readb(kbd_iobase + 0x60UL);
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}
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static inline int i8042_read_status(void)
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{
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return readb(kbd_iobase + 0x64UL);
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}
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static inline void i8042_write_data(int val)
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{
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writeb(val, kbd_iobase + 0x60UL);
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}
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static inline void i8042_write_command(int val)
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{
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writeb(val, kbd_iobase + 0x64UL);
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}
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#ifdef CONFIG_PCI
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static struct resource *kbd_res;
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#define OBP_PS2KBD_NAME1 "kb_ps2"
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#define OBP_PS2KBD_NAME2 "keyboard"
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#define OBP_PS2MS_NAME1 "kdmouse"
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#define OBP_PS2MS_NAME2 "mouse"
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static int sparc_i8042_probe(struct platform_device *op)
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{
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struct device_node *dp;
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for_each_child_of_node(op->dev.of_node, dp) {
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if (of_node_name_eq(dp, OBP_PS2KBD_NAME1) ||
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of_node_name_eq(dp, OBP_PS2KBD_NAME2)) {
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struct platform_device *kbd = of_find_device_by_node(dp);
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unsigned int irq = kbd->archdata.irqs[0];
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if (irq == 0xffffffff)
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irq = op->archdata.irqs[0];
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i8042_kbd_irq = irq;
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kbd_iobase = of_ioremap(&kbd->resource[0],
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0, 8, "kbd");
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kbd_res = &kbd->resource[0];
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} else if (of_node_name_eq(dp, OBP_PS2MS_NAME1) ||
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of_node_name_eq(dp, OBP_PS2MS_NAME2)) {
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struct platform_device *ms = of_find_device_by_node(dp);
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unsigned int irq = ms->archdata.irqs[0];
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if (irq == 0xffffffff)
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irq = op->archdata.irqs[0];
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i8042_aux_irq = irq;
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}
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}
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return 0;
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}
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static int sparc_i8042_remove(struct platform_device *op)
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{
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of_iounmap(kbd_res, kbd_iobase, 8);
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return 0;
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}
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static const struct of_device_id sparc_i8042_match[] = {
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{
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.name = "8042",
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},
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{},
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};
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MODULE_DEVICE_TABLE(of, sparc_i8042_match);
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static struct platform_driver sparc_i8042_driver = {
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.driver = {
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.name = "i8042",
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.of_match_table = sparc_i8042_match,
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},
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.probe = sparc_i8042_probe,
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.remove = sparc_i8042_remove,
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};
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static int __init i8042_platform_init(void)
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{
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struct device_node *root = of_find_node_by_path("/");
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const char *name = of_get_property(root, "name", NULL);
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if (name && !strcmp(name, "SUNW,JavaStation-1")) {
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/* Hardcoded values for MrCoffee. */
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i8042_kbd_irq = i8042_aux_irq = 13 | 0x20;
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kbd_iobase = ioremap(0x71300060, 8);
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if (!kbd_iobase)
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return -ENODEV;
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} else {
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int err = platform_driver_register(&sparc_i8042_driver);
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if (err)
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return err;
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if (i8042_kbd_irq == -1 ||
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i8042_aux_irq == -1) {
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if (kbd_iobase) {
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of_iounmap(kbd_res, kbd_iobase, 8);
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kbd_iobase = (void __iomem *) NULL;
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}
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return -ENODEV;
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}
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}
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i8042_reset = I8042_RESET_ALWAYS;
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return 0;
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}
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static inline void i8042_platform_exit(void)
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{
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struct device_node *root = of_find_node_by_path("/");
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const char *name = of_get_property(root, "name", NULL);
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if (!name || strcmp(name, "SUNW,JavaStation-1"))
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platform_driver_unregister(&sparc_i8042_driver);
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}
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#else /* !CONFIG_PCI */
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static int __init i8042_platform_init(void)
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{
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return -ENODEV;
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}
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static inline void i8042_platform_exit(void)
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{
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}
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#endif /* !CONFIG_PCI */
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#endif /* _I8042_SPARCIO_H */
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