Varadarajan, Charulatha | f547170 | 2010-12-07 16:26:57 -0800 | [diff] [blame] | 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> |
Tarun Kanti DebBarma | 60a3437 | 2011-09-29 04:47:25 +0530 | [diff] [blame^] | 26 | #include <plat/omap-pm.h> |
Varadarajan, Charulatha | f547170 | 2010-12-07 16:26:57 -0800 | [diff] [blame] | 27 | |
Charulatha V | 0cde8d0 | 2011-05-05 20:15:16 +0530 | [diff] [blame] | 28 | #include "powerdomain.h" |
| 29 | |
Varadarajan, Charulatha | f547170 | 2010-12-07 16:26:57 -0800 | [diff] [blame] | 30 | static int omap2_gpio_dev_init(struct omap_hwmod *oh, void *unused) |
| 31 | { |
Kevin Hilman | 3528c58 | 2011-07-21 13:48:45 -0700 | [diff] [blame] | 32 | struct platform_device *pdev; |
Varadarajan, Charulatha | f547170 | 2010-12-07 16:26:57 -0800 | [diff] [blame] | 33 | struct omap_gpio_platform_data *pdata; |
| 34 | struct omap_gpio_dev_attr *dev_attr; |
| 35 | char *name = "omap_gpio"; |
| 36 | int id; |
Charulatha V | 0cde8d0 | 2011-05-05 20:15:16 +0530 | [diff] [blame] | 37 | struct powerdomain *pwrdm; |
Varadarajan, Charulatha | f547170 | 2010-12-07 16:26:57 -0800 | [diff] [blame] | 38 | |
| 39 | /* |
| 40 | * extract the device id from name field available in the |
| 41 | * hwmod database and use the same for constructing ids for |
| 42 | * gpio devices. |
| 43 | * CAUTION: Make sure the name in the hwmod database does |
| 44 | * not change. If changed, make corresponding change here |
| 45 | * or make use of static variable mechanism to handle this. |
| 46 | */ |
| 47 | sscanf(oh->name, "gpio%d", &id); |
| 48 | |
| 49 | pdata = kzalloc(sizeof(struct omap_gpio_platform_data), GFP_KERNEL); |
| 50 | if (!pdata) { |
| 51 | pr_err("gpio%d: Memory allocation failed\n", id); |
| 52 | return -ENOMEM; |
| 53 | } |
| 54 | |
| 55 | dev_attr = (struct omap_gpio_dev_attr *)oh->dev_attr; |
| 56 | pdata->bank_width = dev_attr->bank_width; |
| 57 | pdata->dbck_flag = dev_attr->dbck_flag; |
| 58 | pdata->virtual_irq_start = IH_GPIO_BASE + 32 * (id - 1); |
Tarun Kanti DebBarma | 60a3437 | 2011-09-29 04:47:25 +0530 | [diff] [blame^] | 59 | pdata->get_context_loss_count = omap_pm_get_dev_context_loss_count; |
Kevin Hilman | fa87931a | 2011-04-20 16:31:23 -0700 | [diff] [blame] | 60 | pdata->regs = kzalloc(sizeof(struct omap_gpio_reg_offs), GFP_KERNEL); |
| 61 | if (!pdata) { |
| 62 | pr_err("gpio%d: Memory allocation failed\n", id); |
| 63 | return -ENOMEM; |
| 64 | } |
| 65 | |
Varadarajan, Charulatha | f547170 | 2010-12-07 16:26:57 -0800 | [diff] [blame] | 66 | switch (oh->class->rev) { |
| 67 | case 0: |
| 68 | case 1: |
| 69 | pdata->bank_type = METHOD_GPIO_24XX; |
Kevin Hilman | e5ff444 | 2011-04-22 14:37:16 -0700 | [diff] [blame] | 70 | pdata->regs->revision = OMAP24XX_GPIO_REVISION; |
Kevin Hilman | fa87931a | 2011-04-20 16:31:23 -0700 | [diff] [blame] | 71 | pdata->regs->direction = OMAP24XX_GPIO_OE; |
| 72 | pdata->regs->datain = OMAP24XX_GPIO_DATAIN; |
| 73 | pdata->regs->dataout = OMAP24XX_GPIO_DATAOUT; |
| 74 | pdata->regs->set_dataout = OMAP24XX_GPIO_SETDATAOUT; |
| 75 | pdata->regs->clr_dataout = OMAP24XX_GPIO_CLEARDATAOUT; |
Kevin Hilman | eef4bec | 2011-04-21 09:17:35 -0700 | [diff] [blame] | 76 | pdata->regs->irqstatus = OMAP24XX_GPIO_IRQSTATUS1; |
| 77 | pdata->regs->irqstatus2 = OMAP24XX_GPIO_IRQSTATUS2; |
Kevin Hilman | 28f3b5a | 2011-04-21 09:53:06 -0700 | [diff] [blame] | 78 | pdata->regs->irqenable = OMAP24XX_GPIO_IRQENABLE1; |
| 79 | pdata->regs->set_irqenable = OMAP24XX_GPIO_SETIRQENABLE1; |
| 80 | pdata->regs->clr_irqenable = OMAP24XX_GPIO_CLEARIRQENABLE1; |
Kevin Hilman | 9942da0 | 2011-04-22 12:02:05 -0700 | [diff] [blame] | 81 | pdata->regs->debounce = OMAP24XX_GPIO_DEBOUNCE_VAL; |
| 82 | pdata->regs->debounce_en = OMAP24XX_GPIO_DEBOUNCE_EN; |
Varadarajan, Charulatha | f547170 | 2010-12-07 16:26:57 -0800 | [diff] [blame] | 83 | break; |
| 84 | case 2: |
| 85 | pdata->bank_type = METHOD_GPIO_44XX; |
Kevin Hilman | e5ff444 | 2011-04-22 14:37:16 -0700 | [diff] [blame] | 86 | pdata->regs->revision = OMAP4_GPIO_REVISION; |
Kevin Hilman | fa87931a | 2011-04-20 16:31:23 -0700 | [diff] [blame] | 87 | pdata->regs->direction = OMAP4_GPIO_OE; |
| 88 | pdata->regs->datain = OMAP4_GPIO_DATAIN; |
| 89 | pdata->regs->dataout = OMAP4_GPIO_DATAOUT; |
| 90 | pdata->regs->set_dataout = OMAP4_GPIO_SETDATAOUT; |
| 91 | pdata->regs->clr_dataout = OMAP4_GPIO_CLEARDATAOUT; |
Kevin Hilman | eef4bec | 2011-04-21 09:17:35 -0700 | [diff] [blame] | 92 | pdata->regs->irqstatus = OMAP4_GPIO_IRQSTATUS0; |
| 93 | pdata->regs->irqstatus2 = OMAP4_GPIO_IRQSTATUS1; |
Kevin Hilman | 28f3b5a | 2011-04-21 09:53:06 -0700 | [diff] [blame] | 94 | pdata->regs->irqenable = OMAP4_GPIO_IRQSTATUSSET0; |
| 95 | pdata->regs->set_irqenable = OMAP4_GPIO_IRQSTATUSSET0; |
| 96 | pdata->regs->clr_irqenable = OMAP4_GPIO_IRQSTATUSCLR0; |
Kevin Hilman | 9942da0 | 2011-04-22 12:02:05 -0700 | [diff] [blame] | 97 | pdata->regs->debounce = OMAP4_GPIO_DEBOUNCINGTIME; |
| 98 | pdata->regs->debounce_en = OMAP4_GPIO_DEBOUNCENABLE; |
Varadarajan, Charulatha | f547170 | 2010-12-07 16:26:57 -0800 | [diff] [blame] | 99 | break; |
| 100 | default: |
| 101 | WARN(1, "Invalid gpio bank_type\n"); |
| 102 | kfree(pdata); |
| 103 | return -EINVAL; |
| 104 | } |
| 105 | |
Charulatha V | 0cde8d0 | 2011-05-05 20:15:16 +0530 | [diff] [blame] | 106 | pwrdm = omap_hwmod_get_pwrdm(oh); |
| 107 | pdata->loses_context = pwrdm_can_ever_lose_context(pwrdm); |
| 108 | |
Kevin Hilman | 3528c58 | 2011-07-21 13:48:45 -0700 | [diff] [blame] | 109 | pdev = omap_device_build(name, id - 1, oh, pdata, |
Benoit Cousson | f718e2c | 2011-08-10 15:30:09 +0200 | [diff] [blame] | 110 | sizeof(*pdata), NULL, 0, false); |
Varadarajan, Charulatha | f547170 | 2010-12-07 16:26:57 -0800 | [diff] [blame] | 111 | kfree(pdata); |
| 112 | |
Kevin Hilman | 3528c58 | 2011-07-21 13:48:45 -0700 | [diff] [blame] | 113 | if (IS_ERR(pdev)) { |
Lucas De Marchi | 25985ed | 2011-03-30 22:57:33 -0300 | [diff] [blame] | 114 | WARN(1, "Can't build omap_device for %s:%s.\n", |
Varadarajan, Charulatha | f547170 | 2010-12-07 16:26:57 -0800 | [diff] [blame] | 115 | name, oh->name); |
Kevin Hilman | 3528c58 | 2011-07-21 13:48:45 -0700 | [diff] [blame] | 116 | return PTR_ERR(pdev); |
Varadarajan, Charulatha | f547170 | 2010-12-07 16:26:57 -0800 | [diff] [blame] | 117 | } |
| 118 | |
Kevin Hilman | 9f8b694 | 2011-08-01 09:33:13 -0700 | [diff] [blame] | 119 | omap_device_disable_idle_on_suspend(pdev); |
Kevin Hilman | c8c9fda | 2011-07-12 22:48:42 +0200 | [diff] [blame] | 120 | |
Varadarajan, Charulatha | f547170 | 2010-12-07 16:26:57 -0800 | [diff] [blame] | 121 | return 0; |
| 122 | } |
| 123 | |
| 124 | /* |
| 125 | * gpio_init needs to be done before |
| 126 | * machine_init functions access gpio APIs. |
| 127 | * Hence gpio_init is a postcore_initcall. |
| 128 | */ |
| 129 | static int __init omap2_gpio_init(void) |
| 130 | { |
| 131 | return omap_hwmod_for_each_by_class("gpio", omap2_gpio_dev_init, |
| 132 | NULL); |
| 133 | } |
| 134 | postcore_initcall(omap2_gpio_init); |