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7fdc7849 AP |
1 | /* |
2 | * arch/arm/mach-s3c2410/h1940-bluetooth.c | |
3 | * Copyright (c) Arnaud Patard <arnaud.patard@rtp-net.org> | |
4 | * | |
5 | * This file is subject to the terms and conditions of the GNU General Public | |
6 | * License. See the file COPYING in the main directory of this archive for | |
7 | * more details. | |
8 | * | |
9 | * S3C2410 bluetooth "driver" | |
10 | * | |
11 | */ | |
12 | ||
13 | #include <linux/module.h> | |
14 | #include <linux/platform_device.h> | |
15 | #include <linux/delay.h> | |
16 | #include <linux/string.h> | |
17 | #include <linux/ctype.h> | |
18 | #include <linux/leds.h> | |
ec976d6e | 19 | #include <linux/gpio.h> |
1a71e4ad | 20 | #include <linux/rfkill.h> |
ec976d6e | 21 | |
36437412 | 22 | #include <plat/gpio-cfg.h> |
a09e64fb | 23 | #include <mach/hardware.h> |
232910d6 | 24 | #include <mach/regs-gpio.h> |
b0161caa | 25 | #include <mach/gpio-samsung.h> |
232910d6 KK |
26 | |
27 | #include "h1940.h" | |
7fdc7849 | 28 | |
50e2d10d | 29 | #define DRV_NAME "h1940-bt" |
7fdc7849 | 30 | |
7fdc7849 AP |
31 | /* Bluetooth control */ |
32 | static void h1940bt_enable(int on) | |
33 | { | |
34 | if (on) { | |
7fdc7849 | 35 | /* Power on the chip */ |
14477095 | 36 | gpio_set_value(H1940_LATCH_BLUETOOTH_POWER, 1); |
7fdc7849 AP |
37 | /* Reset the chip */ |
38 | mdelay(10); | |
f4146a65 BD |
39 | |
40 | gpio_set_value(S3C2410_GPH(1), 1); | |
7fdc7849 | 41 | mdelay(10); |
f4146a65 | 42 | gpio_set_value(S3C2410_GPH(1), 0); |
50e2d10d | 43 | |
c673a2b4 | 44 | h1940_led_blink_set(NULL, GPIO_LED_BLINK, NULL, NULL); |
7fdc7849 AP |
45 | } |
46 | else { | |
f4146a65 | 47 | gpio_set_value(S3C2410_GPH(1), 1); |
7fdc7849 | 48 | mdelay(10); |
f4146a65 | 49 | gpio_set_value(S3C2410_GPH(1), 0); |
7fdc7849 | 50 | mdelay(10); |
14477095 | 51 | gpio_set_value(H1940_LATCH_BLUETOOTH_POWER, 0); |
50e2d10d | 52 | |
c673a2b4 | 53 | h1940_led_blink_set(NULL, GPIO_LED_NO_BLINK_LOW, NULL, NULL); |
7fdc7849 AP |
54 | } |
55 | } | |
56 | ||
1a71e4ad | 57 | static int h1940bt_set_block(void *data, bool blocked) |
7fdc7849 | 58 | { |
1a71e4ad | 59 | h1940bt_enable(!blocked); |
60 | return 0; | |
7fdc7849 AP |
61 | } |
62 | ||
1a71e4ad | 63 | static const struct rfkill_ops h1940bt_rfkill_ops = { |
64 | .set_block = h1940bt_set_block, | |
65 | }; | |
7fdc7849 | 66 | |
351a102d | 67 | static int h1940bt_probe(struct platform_device *pdev) |
7fdc7849 | 68 | { |
1a71e4ad | 69 | struct rfkill *rfk; |
70 | int ret = 0; | |
71 | ||
f4146a65 BD |
72 | ret = gpio_request(S3C2410_GPH(1), dev_name(&pdev->dev)); |
73 | if (ret) { | |
14477095 VK |
74 | dev_err(&pdev->dev, "could not get GPH1\n"); |
75 | return ret; | |
76 | } | |
77 | ||
78 | ret = gpio_request(H1940_LATCH_BLUETOOTH_POWER, dev_name(&pdev->dev)); | |
79 | if (ret) { | |
80 | gpio_free(S3C2410_GPH(1)); | |
81 | dev_err(&pdev->dev, "could not get BT_POWER\n"); | |
f4146a65 BD |
82 | return ret; |
83 | } | |
84 | ||
7fdc7849 | 85 | /* Configures BT serial port GPIOs */ |
40b956f0 | 86 | s3c_gpio_cfgpin(S3C2410_GPH(0), S3C2410_GPH0_nCTS0); |
6fc50eaf | 87 | s3c_gpio_setpull(S3C2410_GPH(0), S3C_GPIO_PULL_NONE); |
40b956f0 | 88 | s3c_gpio_cfgpin(S3C2410_GPH(1), S3C2410_GPIO_OUTPUT); |
6fc50eaf | 89 | s3c_gpio_setpull(S3C2410_GPH(1), S3C_GPIO_PULL_NONE); |
40b956f0 | 90 | s3c_gpio_cfgpin(S3C2410_GPH(2), S3C2410_GPH2_TXD0); |
6fc50eaf | 91 | s3c_gpio_setpull(S3C2410_GPH(2), S3C_GPIO_PULL_NONE); |
40b956f0 | 92 | s3c_gpio_cfgpin(S3C2410_GPH(3), S3C2410_GPH3_RXD0); |
6fc50eaf | 93 | s3c_gpio_setpull(S3C2410_GPH(3), S3C_GPIO_PULL_NONE); |
7fdc7849 | 94 | |
1a71e4ad | 95 | rfk = rfkill_alloc(DRV_NAME, &pdev->dev, RFKILL_TYPE_BLUETOOTH, |
96 | &h1940bt_rfkill_ops, NULL); | |
97 | if (!rfk) { | |
98 | ret = -ENOMEM; | |
99 | goto err_rfk_alloc; | |
100 | } | |
101 | ||
1a71e4ad | 102 | ret = rfkill_register(rfk); |
103 | if (ret) | |
104 | goto err_rfkill; | |
105 | ||
106 | platform_set_drvdata(pdev, rfk); | |
107 | ||
108 | return 0; | |
7fdc7849 | 109 | |
1a71e4ad | 110 | err_rfkill: |
111 | rfkill_destroy(rfk); | |
112 | err_rfk_alloc: | |
113 | return ret; | |
7fdc7849 AP |
114 | } |
115 | ||
116 | static int h1940bt_remove(struct platform_device *pdev) | |
117 | { | |
1a71e4ad | 118 | struct rfkill *rfk = platform_get_drvdata(pdev); |
119 | ||
120 | platform_set_drvdata(pdev, NULL); | |
f4146a65 | 121 | gpio_free(S3C2410_GPH(1)); |
1a71e4ad | 122 | |
123 | if (rfk) { | |
124 | rfkill_unregister(rfk); | |
125 | rfkill_destroy(rfk); | |
126 | } | |
127 | rfk = NULL; | |
128 | ||
129 | h1940bt_enable(0); | |
130 | ||
7fdc7849 AP |
131 | return 0; |
132 | } | |
133 | ||
134 | ||
135 | static struct platform_driver h1940bt_driver = { | |
136 | .driver = { | |
137 | .name = DRV_NAME, | |
138 | }, | |
139 | .probe = h1940bt_probe, | |
140 | .remove = h1940bt_remove, | |
141 | }; | |
142 | ||
1fffc8b2 | 143 | module_platform_driver(h1940bt_driver); |
7fdc7849 AP |
144 | |
145 | MODULE_AUTHOR("Arnaud Patard <arnaud.patard@rtp-net.org>"); | |
146 | MODULE_DESCRIPTION("Driver for the iPAQ H1940 bluetooth chip"); | |
147 | MODULE_LICENSE("GPL"); |