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f547170f VC |
1 | /* |
2 | * OMAP2+ specific gpio initialization | |
3 | * | |
4 | * Copyright (C) 2010 Texas Instruments Incorporated - http://www.ti.com/ | |
5 | * | |
6 | * Author: | |
7 | * Charulatha V <charu@ti.com> | |
8 | * | |
9 | * This program is free software; you can redistribute it and/or | |
10 | * modify it under the terms of the GNU General Public License as | |
11 | * published by the Free Software Foundation version 2. | |
12 | * | |
13 | * This program is distributed "as is" WITHOUT ANY WARRANTY of any | |
14 | * kind, whether express or implied; without even the implied warranty | |
15 | * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | * GNU General Public License for more details. | |
17 | */ | |
18 | ||
19 | #include <linux/gpio.h> | |
20 | #include <linux/err.h> | |
21 | #include <linux/slab.h> | |
22 | #include <linux/interrupt.h> | |
23 | ||
24 | #include <plat/omap_hwmod.h> | |
25 | #include <plat/omap_device.h> | |
26 | ||
f547170f VC |
27 | static int omap2_gpio_dev_init(struct omap_hwmod *oh, void *unused) |
28 | { | |
3528c58e | 29 | struct platform_device *pdev; |
f547170f VC |
30 | struct omap_gpio_platform_data *pdata; |
31 | struct omap_gpio_dev_attr *dev_attr; | |
32 | char *name = "omap_gpio"; | |
33 | int id; | |
34 | ||
35 | /* | |
36 | * extract the device id from name field available in the | |
37 | * hwmod database and use the same for constructing ids for | |
38 | * gpio devices. | |
39 | * CAUTION: Make sure the name in the hwmod database does | |
40 | * not change. If changed, make corresponding change here | |
41 | * or make use of static variable mechanism to handle this. | |
42 | */ | |
43 | sscanf(oh->name, "gpio%d", &id); | |
44 | ||
45 | pdata = kzalloc(sizeof(struct omap_gpio_platform_data), GFP_KERNEL); | |
46 | if (!pdata) { | |
47 | pr_err("gpio%d: Memory allocation failed\n", id); | |
48 | return -ENOMEM; | |
49 | } | |
50 | ||
51 | dev_attr = (struct omap_gpio_dev_attr *)oh->dev_attr; | |
52 | pdata->bank_width = dev_attr->bank_width; | |
53 | pdata->dbck_flag = dev_attr->dbck_flag; | |
54 | pdata->virtual_irq_start = IH_GPIO_BASE + 32 * (id - 1); | |
55 | ||
fa87931a KH |
56 | pdata->regs = kzalloc(sizeof(struct omap_gpio_reg_offs), GFP_KERNEL); |
57 | if (!pdata) { | |
58 | pr_err("gpio%d: Memory allocation failed\n", id); | |
59 | return -ENOMEM; | |
60 | } | |
61 | ||
f547170f VC |
62 | switch (oh->class->rev) { |
63 | case 0: | |
64 | case 1: | |
65 | pdata->bank_type = METHOD_GPIO_24XX; | |
e5ff4440 | 66 | pdata->regs->revision = OMAP24XX_GPIO_REVISION; |
fa87931a KH |
67 | pdata->regs->direction = OMAP24XX_GPIO_OE; |
68 | pdata->regs->datain = OMAP24XX_GPIO_DATAIN; | |
69 | pdata->regs->dataout = OMAP24XX_GPIO_DATAOUT; | |
70 | pdata->regs->set_dataout = OMAP24XX_GPIO_SETDATAOUT; | |
71 | pdata->regs->clr_dataout = OMAP24XX_GPIO_CLEARDATAOUT; | |
eef4bec7 KH |
72 | pdata->regs->irqstatus = OMAP24XX_GPIO_IRQSTATUS1; |
73 | pdata->regs->irqstatus2 = OMAP24XX_GPIO_IRQSTATUS2; | |
28f3b5a0 KH |
74 | pdata->regs->irqenable = OMAP24XX_GPIO_IRQENABLE1; |
75 | pdata->regs->set_irqenable = OMAP24XX_GPIO_SETIRQENABLE1; | |
76 | pdata->regs->clr_irqenable = OMAP24XX_GPIO_CLEARIRQENABLE1; | |
9942da0e KH |
77 | pdata->regs->debounce = OMAP24XX_GPIO_DEBOUNCE_VAL; |
78 | pdata->regs->debounce_en = OMAP24XX_GPIO_DEBOUNCE_EN; | |
f547170f VC |
79 | break; |
80 | case 2: | |
81 | pdata->bank_type = METHOD_GPIO_44XX; | |
e5ff4440 | 82 | pdata->regs->revision = OMAP4_GPIO_REVISION; |
fa87931a KH |
83 | pdata->regs->direction = OMAP4_GPIO_OE; |
84 | pdata->regs->datain = OMAP4_GPIO_DATAIN; | |
85 | pdata->regs->dataout = OMAP4_GPIO_DATAOUT; | |
86 | pdata->regs->set_dataout = OMAP4_GPIO_SETDATAOUT; | |
87 | pdata->regs->clr_dataout = OMAP4_GPIO_CLEARDATAOUT; | |
eef4bec7 KH |
88 | pdata->regs->irqstatus = OMAP4_GPIO_IRQSTATUS0; |
89 | pdata->regs->irqstatus2 = OMAP4_GPIO_IRQSTATUS1; | |
28f3b5a0 KH |
90 | pdata->regs->irqenable = OMAP4_GPIO_IRQSTATUSSET0; |
91 | pdata->regs->set_irqenable = OMAP4_GPIO_IRQSTATUSSET0; | |
92 | pdata->regs->clr_irqenable = OMAP4_GPIO_IRQSTATUSCLR0; | |
9942da0e KH |
93 | pdata->regs->debounce = OMAP4_GPIO_DEBOUNCINGTIME; |
94 | pdata->regs->debounce_en = OMAP4_GPIO_DEBOUNCENABLE; | |
f547170f VC |
95 | break; |
96 | default: | |
97 | WARN(1, "Invalid gpio bank_type\n"); | |
98 | kfree(pdata); | |
99 | return -EINVAL; | |
100 | } | |
101 | ||
3528c58e | 102 | pdev = omap_device_build(name, id - 1, oh, pdata, |
f718e2c0 | 103 | sizeof(*pdata), NULL, 0, false); |
f547170f VC |
104 | kfree(pdata); |
105 | ||
3528c58e | 106 | if (IS_ERR(pdev)) { |
25985edc | 107 | WARN(1, "Can't build omap_device for %s:%s.\n", |
f547170f | 108 | name, oh->name); |
3528c58e | 109 | return PTR_ERR(pdev); |
f547170f VC |
110 | } |
111 | ||
9f8b6949 | 112 | omap_device_disable_idle_on_suspend(pdev); |
c8c9fda5 | 113 | |
f547170f VC |
114 | gpio_bank_count++; |
115 | return 0; | |
116 | } | |
117 | ||
118 | /* | |
119 | * gpio_init needs to be done before | |
120 | * machine_init functions access gpio APIs. | |
121 | * Hence gpio_init is a postcore_initcall. | |
122 | */ | |
123 | static int __init omap2_gpio_init(void) | |
124 | { | |
125 | return omap_hwmod_for_each_by_class("gpio", omap2_gpio_dev_init, | |
126 | NULL); | |
127 | } | |
128 | postcore_initcall(omap2_gpio_init); |