^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) // SPDX-License-Identifier: GPL-2.0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) #include <linux/device.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) #include <linux/spi/spi.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) #include <linux/delay.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) #include <drm/drm_print.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) #include "panel-samsung-s6e63m0.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #define DATA_MASK 0x100
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) static int s6e63m0_spi_dcs_read(struct device *dev, const u8 cmd, u8 *data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) * FIXME: implement reading DCS commands over SPI so we can
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) * properly identify which physical panel is connected.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) *data = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) static int s6e63m0_spi_write_word(struct device *dev, u16 data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) struct spi_device *spi = to_spi_device(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) struct spi_transfer xfer = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) .len = 2,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) .tx_buf = &data,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) struct spi_message msg;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) spi_message_init(&msg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) spi_message_add_tail(&xfer, &msg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) return spi_sync(spi, &msg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) static int s6e63m0_spi_dcs_write(struct device *dev, const u8 *data, size_t len)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) int ret = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) dev_dbg(dev, "SPI writing dcs seq: %*ph\n", (int)len, data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) ret = s6e63m0_spi_write_word(dev, *data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) while (!ret && --len) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) ++data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) ret = s6e63m0_spi_write_word(dev, *data | DATA_MASK);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) if (ret) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) dev_err(dev, "SPI error %d writing dcs seq: %*ph\n", ret,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) (int)len, data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) usleep_range(300, 310);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) static int s6e63m0_spi_probe(struct spi_device *spi)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) struct device *dev = &spi->dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) spi->bits_per_word = 9;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) spi->mode = SPI_MODE_3;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) ret = spi_setup(spi);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) if (ret < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) dev_err(dev, "spi setup failed.\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) return s6e63m0_probe(dev, s6e63m0_spi_dcs_read, s6e63m0_spi_dcs_write,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) false);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) static int s6e63m0_spi_remove(struct spi_device *spi)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) return s6e63m0_remove(&spi->dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) static const struct of_device_id s6e63m0_spi_of_match[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) { .compatible = "samsung,s6e63m0" },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) { /* sentinel */ }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) MODULE_DEVICE_TABLE(of, s6e63m0_spi_of_match);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) static struct spi_driver s6e63m0_spi_driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) .probe = s6e63m0_spi_probe,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) .remove = s6e63m0_spi_remove,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) .driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) .name = "panel-samsung-s6e63m0",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) .of_match_table = s6e63m0_spi_of_match,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) module_spi_driver(s6e63m0_spi_driver);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) MODULE_AUTHOR("Paweł Chmiel <pawel.mikolaj.chmiel@gmail.com>");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) MODULE_DESCRIPTION("s6e63m0 LCD SPI Driver");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) MODULE_LICENSE("GPL v2");
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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