projects / ms2-kexec / blame
| Commit | Line | Data |
|---|---|---|
| c4dc8ddb MG |
1 | /* |
| 2 | * Provide kernel console on headphone jack | |
| 8eb83dc7 MG |
3 | * |
| 4 | * Copyright (C) 2011 Michael Gernoth <michael@gernoth.net> | |
| 5 | * | |
| 6 | * This file is subject to the terms and conditions of the GNU General Public | |
| 7 | * License. See the file "COPYING" in the main directory of this archive | |
| 8 | * for more details. | |
| c4dc8ddb MG |
9 | */ |
| 10 | ||
| 11 | #include <linux/module.h> | |
| 12 | #include <linux/gpio_mapping.h> | |
| 13 | #include <linux/gpio.h> | |
| 8eb83dc7 MG |
14 | #include <linux/platform_device.h> |
| 15 | #include <linux/serial_reg.h> | |
| 16 | #include <linux/clk.h> | |
| 17 | ||
| 18 | #include <plat/board.h> | |
| 19 | #include <plat/control.h> | |
| 20 | #include <asm/mach/serial_omap.h> | |
| 21 | ||
| 22 | #include "prm.h" | |
| 23 | #include "prm-regbits-34xx.h" | |
| c4dc8ddb | 24 | |
| 81799b4e MG |
25 | static int hs_switch = -1; |
| 26 | ||
| c4dc8ddb MG |
27 | /* |
| 28 | * int add_preferred_console(char *name, int idx, char *options) | |
| 29 | * c0069208 T add_preferred_console | |
| 30 | */ | |
| 31 | ||
| 32 | static int (*add_preferred_console)(char *, int, char*) = (int (*)(char*, int, char*))0xc0069208; | |
| 33 | ||
| 8eb83dc7 MG |
34 | void my_omap_serial_init(int wake_gpio_strobe, unsigned int wake_strobe_enable_mask); |
| 35 | int my_omap_hs_init(void); | |
| 36 | ||
| 37 | #define MAPPHONE_BPWAKE_STROBE_GPIO 157 | |
| 38 | ||
| c4dc8ddb MG |
39 | static int __init headphone_cons_init(void) |
| 40 | { | |
| c4dc8ddb MG |
41 | /* Get the headset switch gpio number from devtree */ |
| 42 | hs_switch = get_gpio_by_name("headset_uart_switch"); | |
| 43 | if (hs_switch < 0) | |
| 44 | return -EINVAL; | |
| 45 | ||
| 81799b4e MG |
46 | printk(KERN_INFO "headset_uart_switch: %d\n", hs_switch); |
| 47 | ||
| 48 | printk(KERN_INFO "value: %d\n", gpio_get_value(hs_switch)); | |
| 8eb83dc7 | 49 | if (!gpio_get_value(hs_switch)) |
| 81799b4e | 50 | return -ENODEV; |
| 8eb83dc7 MG |
51 | |
| 52 | printk(KERN_INFO "Enabling UART3...\n"); | |
| 53 | my_omap_serial_init(MAPPHONE_BPWAKE_STROBE_GPIO, 0x01); | |
| 54 | my_omap_hs_init(); | |
| c4dc8ddb MG |
55 | |
| 56 | /* route kernel uart out headset jack */ | |
| 57 | gpio_direction_output(hs_switch, 0); | |
| 81799b4e | 58 | printk(KERN_INFO "value: %d\n", gpio_get_value(hs_switch)); |
| c4dc8ddb | 59 | |
| 8eb83dc7 | 60 | //add_preferred_console("ttyS", 2, "115200"); |
| c4dc8ddb MG |
61 | return 0; |
| 62 | } | |
| 63 | ||
| 8eb83dc7 | 64 | #if 0 |
| 81799b4e MG |
65 | static void __exit headphone_cons_exit(void) |
| 66 | { | |
| 67 | if (hs_switch < 0) | |
| 68 | return; | |
| 69 | ||
| 70 | printk(KERN_INFO "value: %d\n", gpio_get_value(hs_switch)); | |
| 71 | gpio_direction_output(hs_switch, 1); | |
| 72 | printk(KERN_INFO "value: %d\n", gpio_get_value(hs_switch)); | |
| 73 | } | |
| 8eb83dc7 | 74 | #endif |
| 81799b4e MG |
75 | |
| 76 | ||
| c4dc8ddb | 77 | module_init(headphone_cons_init); |
| 8eb83dc7 | 78 | #if 0 |
| 81799b4e | 79 | module_exit(headphone_cons_exit); |
| 8eb83dc7 | 80 | #endif |
| c4dc8ddb MG |
81 | |
| 82 | MODULE_LICENSE("GPL"); | |
| 83 | MODULE_AUTHOR("Michael Gernoth <michael@gernoth.net>"); |