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Commit | Line | Data |
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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 | |
981f7356 MG |
25 | #define USB_CONSOLE 1 |
26 | ||
27 | #ifndef USB_CONSOLE | |
81799b4e | 28 | static int hs_switch = -1; |
981f7356 | 29 | #endif |
81799b4e | 30 | |
981f7356 | 31 | #if 0 |
c4dc8ddb MG |
32 | /* |
33 | * int add_preferred_console(char *name, int idx, char *options) | |
981f7356 | 34 | * c006bec0 T add_preferred_console |
c4dc8ddb MG |
35 | */ |
36 | ||
981f7356 MG |
37 | static int (*add_preferred_console)(char *, int, char*) = (int (*)(char*, int, char*))0xc006bec0; |
38 | #endif | |
c4dc8ddb | 39 | |
8eb83dc7 MG |
40 | void my_omap_serial_init(int wake_gpio_strobe, unsigned int wake_strobe_enable_mask); |
41 | int my_omap_hs_init(void); | |
a18588b1 | 42 | void activate_emu_uart(void); |
8eb83dc7 MG |
43 | |
44 | #define MAPPHONE_BPWAKE_STROBE_GPIO 157 | |
45 | ||
47984ac7 MG |
46 | static int find_ms2_dev(struct device *dev, void *data) |
47 | { | |
48 | if (!strncmp((char*)data, dev_name(dev), strlen((char*)data))) { | |
49 | printk(KERN_INFO "Found it\n"); | |
50 | return 1; | |
51 | } | |
52 | return 0; | |
53 | } | |
54 | ||
981f7356 MG |
55 | #define OMAP_CTRL_REGADDR(reg) (OMAP2_L4_IO_ADDRESS(OMAP343X_CTRL_BASE) + (reg)) |
56 | ||
57 | u32 omap_ctrl_readl(u16 offset) | |
58 | { | |
59 | return __raw_readl(OMAP_CTRL_REGADDR(offset)); | |
60 | } | |
61 | ||
c4dc8ddb MG |
62 | static int __init headphone_cons_init(void) |
63 | { | |
47984ac7 MG |
64 | int bpwake_strobe_gpio; |
65 | struct device *uart3 = NULL; | |
66 | ||
981f7356 MG |
67 | printk("CONTROL_STATUS: 0x%08x\n", omap_ctrl_readl(OMAP343X_CONTROL_STATUS)); |
68 | //<4>[81323.057830] CONTROL_STATUS: 0x00000205 | |
69 | // 01000000101 | |
70 | // DEVICETYPE[10:8]: 010 -> Reserved (High Security) | |
71 | // SYSBOOT[5:0]: 000101 -> MMC2 USB | |
72 | ||
47984ac7 MG |
73 | /* Remove old uart3 device which was disabled... */ |
74 | printk(KERN_INFO "Searching for omap-uart.3...\n"); | |
75 | ||
76 | uart3 = device_find_child(&platform_bus, "omap-uart.3", find_ms2_dev); | |
77 | if (uart3 == NULL) | |
981f7356 | 78 | return -ENODEV; |
47984ac7 MG |
79 | |
80 | printk(KERN_INFO "Deleting old device...\n"); | |
81 | device_del(uart3); | |
82 | ||
981f7356 | 83 | #ifndef USB_CONSOLE |
c4dc8ddb MG |
84 | /* Get the headset switch gpio number from devtree */ |
85 | hs_switch = get_gpio_by_name("headset_uart_switch"); | |
86 | if (hs_switch < 0) | |
87 | return -EINVAL; | |
88 | ||
66526df8 | 89 | printk(KERN_INFO "headset_uart_switch: %d, value: %d\n", hs_switch, gpio_get_value(hs_switch)); |
81799b4e | 90 | |
8eb83dc7 | 91 | if (!gpio_get_value(hs_switch)) |
81799b4e | 92 | return -ENODEV; |
981f7356 | 93 | #endif |
e14c6eae | 94 | |
8eb83dc7 | 95 | printk(KERN_INFO "Enabling UART3...\n"); |
47984ac7 MG |
96 | bpwake_strobe_gpio = get_gpio_by_name("ipc_bpwake_strobe"); |
97 | if (bpwake_strobe_gpio < 0) | |
98 | bpwake_strobe_gpio = MAPPHONE_BPWAKE_STROBE_GPIO; | |
99 | printk("Serial init with strobe pin %d\n", bpwake_strobe_gpio); | |
100 | my_omap_serial_init(bpwake_strobe_gpio, 0x01); | |
8eb83dc7 | 101 | my_omap_hs_init(); |
c4dc8ddb | 102 | |
981f7356 MG |
103 | #ifdef USB_CONSOLE |
104 | printk(KERN_INFO "Activating emu_uart on mini-usb port\n"); | |
105 | activate_emu_uart(); | |
106 | #else | |
c4dc8ddb | 107 | /* route kernel uart out headset jack */ |
a18588b1 | 108 | gpio_set_value(hs_switch, 0); |
66526df8 | 109 | printk(KERN_INFO "headset_uart_switch: %d, value: %d\n", hs_switch, gpio_get_value(hs_switch)); |
981f7356 | 110 | #endif |
c4dc8ddb | 111 | |
981f7356 | 112 | #if 0 |
47984ac7 | 113 | add_preferred_console("ttyS", 2, "115200"); |
981f7356 | 114 | #endif |
c4dc8ddb MG |
115 | return 0; |
116 | } | |
117 | ||
8eb83dc7 | 118 | #if 0 |
81799b4e MG |
119 | static void __exit headphone_cons_exit(void) |
120 | { | |
121 | if (hs_switch < 0) | |
122 | return; | |
123 | ||
124 | printk(KERN_INFO "value: %d\n", gpio_get_value(hs_switch)); | |
125 | gpio_direction_output(hs_switch, 1); | |
126 | printk(KERN_INFO "value: %d\n", gpio_get_value(hs_switch)); | |
127 | } | |
8eb83dc7 | 128 | #endif |
81799b4e MG |
129 | |
130 | ||
c4dc8ddb | 131 | module_init(headphone_cons_init); |
8eb83dc7 | 132 | #if 0 |
81799b4e | 133 | module_exit(headphone_cons_exit); |
8eb83dc7 | 134 | #endif |
c4dc8ddb MG |
135 | |
136 | MODULE_LICENSE("GPL"); | |
137 | MODULE_AUTHOR("Michael Gernoth <michael@gernoth.net>"); |