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56 lines
1.4 KiB
56 lines
1.4 KiB
/* SPDX-License-Identifier: GPL-2.0+
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*
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* Copyright (c) 2015 Free Electrons
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* Copyright (c) 2015 NextThing Co
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*
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*/
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#ifndef __W1_H
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#define __W1_H
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struct udevice;
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#define W1_FAMILY_DS24B33 0x23
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#define W1_FAMILY_DS2431 0x2d
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#define W1_FAMILY_DS2502 0x09
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#define W1_FAMILY_EEP_SANDBOX 0xfe
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struct w1_driver_entry {
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struct driver *driver;
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u8 *family;
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};
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/* U_BOOT_W1_DEVICE() tells U-Boot to create a one-wire device.
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*
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* @__name: Device name (C identifier, not a string. E.g. gpio7_at_ff7e0000)
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* @__driver: Driver name (C identifier, not a string. E.g. gpio7_at_ff7e0000)
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* @__family: Family code number of the one-wire
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*/
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#define U_BOOT_W1_DEVICE(__name, __family) \
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ll_entry_declare(struct w1_driver_entry, __name, w1_driver_entry) = { \
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.driver = llsym(struct driver, __name, driver), \
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.family = __family, \
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}
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struct w1_device {
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u64 id;
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};
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struct w1_ops {
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u8 (*read_byte)(struct udevice *dev);
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bool (*reset)(struct udevice *dev);
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u8 (*triplet)(struct udevice *dev, bool bdir);
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void (*write_byte)(struct udevice *dev, u8 byte);
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};
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int w1_get_bus(int busnum, struct udevice **busp);
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u8 w1_get_device_family(struct udevice *dev);
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int w1_read_buf(struct udevice *dev, u8 *buf, unsigned int count);
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int w1_read_byte(struct udevice *dev);
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int w1_reset_select(struct udevice *dev);
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int w1_write_buf(struct udevice *dev, u8 *buf, unsigned int count);
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int w1_write_byte(struct udevice *dev, u8 byte);
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#endif
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