^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) // SPDX-License-Identifier: GPL-1.0+
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) //
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) // Copyright (c) Arnaud Patard <arnaud.patard@rtp-net.org>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) //
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) // S3C2410 bluetooth "driver"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) #include <linux/platform_device.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) #include <linux/delay.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) #include <linux/string.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #include <linux/ctype.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include <linux/leds.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include <linux/gpio.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #include <linux/rfkill.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) #include "gpio-cfg.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) #include "regs-gpio.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) #include "gpio-samsung.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) #include "h1940.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) #define DRV_NAME "h1940-bt"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) /* Bluetooth control */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) static void h1940bt_enable(int on)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) if (on) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) /* Power on the chip */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) gpio_set_value(H1940_LATCH_BLUETOOTH_POWER, 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) /* Reset the chip */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) mdelay(10);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) gpio_set_value(S3C2410_GPH(1), 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) mdelay(10);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) gpio_set_value(S3C2410_GPH(1), 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) h1940_led_blink_set(NULL, GPIO_LED_BLINK, NULL, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) gpio_set_value(S3C2410_GPH(1), 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) mdelay(10);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) gpio_set_value(S3C2410_GPH(1), 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) mdelay(10);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) gpio_set_value(H1940_LATCH_BLUETOOTH_POWER, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) h1940_led_blink_set(NULL, GPIO_LED_NO_BLINK_LOW, NULL, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) static int h1940bt_set_block(void *data, bool blocked)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) h1940bt_enable(!blocked);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) static const struct rfkill_ops h1940bt_rfkill_ops = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) .set_block = h1940bt_set_block,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) static int h1940bt_probe(struct platform_device *pdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) struct rfkill *rfk;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) int ret = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) ret = gpio_request(S3C2410_GPH(1), dev_name(&pdev->dev));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) if (ret) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) dev_err(&pdev->dev, "could not get GPH1\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) ret = gpio_request(H1940_LATCH_BLUETOOTH_POWER, dev_name(&pdev->dev));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) if (ret) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) gpio_free(S3C2410_GPH(1));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) dev_err(&pdev->dev, "could not get BT_POWER\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) return ret;
^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) /* Configures BT serial port GPIOs */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) s3c_gpio_cfgpin(S3C2410_GPH(0), S3C2410_GPH0_nCTS0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) s3c_gpio_setpull(S3C2410_GPH(0), S3C_GPIO_PULL_NONE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) s3c_gpio_cfgpin(S3C2410_GPH(1), S3C2410_GPIO_OUTPUT);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) s3c_gpio_setpull(S3C2410_GPH(1), S3C_GPIO_PULL_NONE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) s3c_gpio_cfgpin(S3C2410_GPH(2), S3C2410_GPH2_TXD0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) s3c_gpio_setpull(S3C2410_GPH(2), S3C_GPIO_PULL_NONE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) s3c_gpio_cfgpin(S3C2410_GPH(3), S3C2410_GPH3_RXD0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) s3c_gpio_setpull(S3C2410_GPH(3), S3C_GPIO_PULL_NONE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) rfk = rfkill_alloc(DRV_NAME, &pdev->dev, RFKILL_TYPE_BLUETOOTH,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) &h1940bt_rfkill_ops, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) if (!rfk) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) ret = -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) goto err_rfk_alloc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) ret = rfkill_register(rfk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) goto err_rfkill;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) platform_set_drvdata(pdev, rfk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) err_rfkill:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) rfkill_destroy(rfk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) err_rfk_alloc:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) static int h1940bt_remove(struct platform_device *pdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) struct rfkill *rfk = platform_get_drvdata(pdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) platform_set_drvdata(pdev, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) gpio_free(S3C2410_GPH(1));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) if (rfk) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) rfkill_unregister(rfk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) rfkill_destroy(rfk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) rfk = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) h1940bt_enable(0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) static struct platform_driver h1940bt_driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) .driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) .name = DRV_NAME,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) .probe = h1940bt_probe,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) .remove = h1940bt_remove,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) module_platform_driver(h1940bt_driver);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) MODULE_AUTHOR("Arnaud Patard <arnaud.patard@rtp-net.org>");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) MODULE_DESCRIPTION("Driver for the iPAQ H1940 bluetooth chip");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) MODULE_LICENSE("GPL");
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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