| | 1 | /* |
| | 2 | * Provide kernel console on headphone jack |
| | 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. |
| | 9 | */ |
| | 10 | |
| | 11 | #include <linux/module.h> |
| | 12 | #include <linux/gpio_mapping.h> |
| | 13 | #include <linux/gpio.h> |
| | 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" |
| | 24 | |
| | 25 | static int hs_switch = -1; |
| | 26 | |
| | 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 | |
| | 34 | void my_omap_serial_init(int wake_gpio_strobe, unsigned int wake_strobe_enable_mask); |
| | 35 | int my_omap_hs_init(void); |
| | 36 | int my_serial_omap_init(void); |
| | 37 | void activate_emu_uart(void); |
| | 38 | |
| | 39 | #define MAPPHONE_BPWAKE_STROBE_GPIO 157 |
| | 40 | |
| | 41 | static int __init headphone_cons_init(void) |
| | 42 | { |
| | 43 | /* Get the headset switch gpio number from devtree */ |
| | 44 | hs_switch = get_gpio_by_name("headset_uart_switch"); |
| | 45 | if (hs_switch < 0) |
| | 46 | return -EINVAL; |
| | 47 | |
| | 48 | printk(KERN_INFO "headset_uart_switch: %d, value: %d\n", hs_switch, gpio_get_value(hs_switch)); |
| | 49 | |
| | 50 | if (!gpio_get_value(hs_switch)) |
| | 51 | return -ENODEV; |
| | 52 | |
| | 53 | printk(KERN_INFO "Loading slightly modified omap serial driver...\n"); |
| | 54 | my_serial_omap_init(); |
| | 55 | |
| | 56 | printk(KERN_INFO "Enabling UART3...\n"); |
| | 57 | my_omap_serial_init(MAPPHONE_BPWAKE_STROBE_GPIO, 0x01); |
| | 58 | my_omap_hs_init(); |
| | 59 | |
| | 60 | /* route kernel uart out headset jack */ |
| | 61 | gpio_set_value(hs_switch, 0); |
| | 62 | printk(KERN_INFO "headset_uart_switch: %d, value: %d\n", hs_switch, gpio_get_value(hs_switch)); |
| | 63 | |
| | 64 | //activate_emu_uart(); |
| | 65 | |
| | 66 | //add_preferred_console("ttyS", 2, "115200"); |
| | 67 | return 0; |
| | 68 | } |
| | 69 | |
| | 70 | #if 0 |
| | 71 | static void __exit headphone_cons_exit(void) |
| | 72 | { |
| | 73 | if (hs_switch < 0) |
| | 74 | return; |
| | 75 | |
| | 76 | printk(KERN_INFO "value: %d\n", gpio_get_value(hs_switch)); |
| | 77 | gpio_direction_output(hs_switch, 1); |
| | 78 | printk(KERN_INFO "value: %d\n", gpio_get_value(hs_switch)); |
| | 79 | } |
| | 80 | #endif |
| | 81 | |
| | 82 | |
| | 83 | module_init(headphone_cons_init); |
| | 84 | #if 0 |
| | 85 | module_exit(headphone_cons_exit); |
| | 86 | #endif |
| | 87 | |
| | 88 | MODULE_LICENSE("GPL"); |
| | 89 | MODULE_AUTHOR("Michael Gernoth <michael@gernoth.net>"); |
projects / ms2-kexec / blame_incremental