aboutsummaryrefslogtreecommitdiff
path: root/drivers/gpio/bt8xxgpio.c
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/gpio/bt8xxgpio.c')
-rw-r--r--drivers/gpio/bt8xxgpio.c348
1 files changed, 0 insertions, 348 deletions
diff --git a/drivers/gpio/bt8xxgpio.c b/drivers/gpio/bt8xxgpio.c
deleted file mode 100644
index aa4f09ad3ce..00000000000
--- a/drivers/gpio/bt8xxgpio.c
+++ /dev/null
@@ -1,348 +0,0 @@
-/*
-
- bt8xx GPIO abuser
-
- Copyright (C) 2008 Michael Buesch <mb@bu3sch.de>
-
- Please do _only_ contact the people listed _above_ with issues related to this driver.
- All the other people listed below are not related to this driver. Their names
- are only here, because this driver is derived from the bt848 driver.
-
-
- Derived from the bt848 driver:
-
- Copyright (C) 1996,97,98 Ralph Metzler
- & Marcus Metzler
- (c) 1999-2002 Gerd Knorr
-
- some v4l2 code lines are taken from Justin's bttv2 driver which is
- (c) 2000 Justin Schoeman
-
- V4L1 removal from:
- (c) 2005-2006 Nickolay V. Shmyrev
-
- Fixes to be fully V4L2 compliant by
- (c) 2006 Mauro Carvalho Chehab
-
- Cropping and overscan support
- Copyright (C) 2005, 2006 Michael H. Schimek
- Sponsored by OPQ Systems AB
-
- This program is free software; you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 2 of the License, or
- (at your option) any later version.
-
- This program is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- GNU General Public License for more details.
-
- You should have received a copy of the GNU General Public License
- along with this program; if not, write to the Free Software
- Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
-*/
-
-#include <linux/module.h>
-#include <linux/pci.h>
-#include <linux/spinlock.h>
-#include <linux/gpio.h>
-#include <linux/slab.h>
-
-/* Steal the hardware definitions from the bttv driver. */
-#include "../media/video/bt8xx/bt848.h"
-
-
-#define BT8XXGPIO_NR_GPIOS 24 /* We have 24 GPIO pins */
-
-
-struct bt8xxgpio {
- spinlock_t lock;
-
- void __iomem *mmio;
- struct pci_dev *pdev;
- struct gpio_chip gpio;
-
-#ifdef CONFIG_PM
- u32 saved_outen;
- u32 saved_data;
-#endif
-};
-
-#define bgwrite(dat, adr) writel((dat), bg->mmio+(adr))
-#define bgread(adr) readl(bg->mmio+(adr))
-
-
-static int modparam_gpiobase = -1/* dynamic */;
-module_param_named(gpiobase, modparam_gpiobase, int, 0444);
-MODULE_PARM_DESC(gpiobase, "The GPIO number base. -1 means dynamic, which is the default.");
-
-
-static int bt8xxgpio_gpio_direction_input(struct gpio_chip *gpio, unsigned nr)
-{
- struct bt8xxgpio *bg = container_of(gpio, struct bt8xxgpio, gpio);
- unsigned long flags;
- u32 outen, data;
-
- spin_lock_irqsave(&bg->lock, flags);
-
- data = bgread(BT848_GPIO_DATA);
- data &= ~(1 << nr);
- bgwrite(data, BT848_GPIO_DATA);
-
- outen = bgread(BT848_GPIO_OUT_EN);
- outen &= ~(1 << nr);
- bgwrite(outen, BT848_GPIO_OUT_EN);
-
- spin_unlock_irqrestore(&bg->lock, flags);
-
- return 0;
-}
-
-static int bt8xxgpio_gpio_get(struct gpio_chip *gpio, unsigned nr)
-{
- struct bt8xxgpio *bg = container_of(gpio, struct bt8xxgpio, gpio);
- unsigned long flags;
- u32 val;
-
- spin_lock_irqsave(&bg->lock, flags);
- val = bgread(BT848_GPIO_DATA);
- spin_unlock_irqrestore(&bg->lock, flags);
-
- return !!(val & (1 << nr));
-}
-
-static int bt8xxgpio_gpio_direction_output(struct gpio_chip *gpio,
- unsigned nr, int val)
-{
- struct bt8xxgpio *bg = container_of(gpio, struct bt8xxgpio, gpio);
- unsigned long flags;
- u32 outen, data;
-
- spin_lock_irqsave(&bg->lock, flags);
-
- outen = bgread(BT848_GPIO_OUT_EN);
- outen |= (1 << nr);
- bgwrite(outen, BT848_GPIO_OUT_EN);
-
- data = bgread(BT848_GPIO_DATA);
- if (val)
- data |= (1 << nr);
- else
- data &= ~(1 << nr);
- bgwrite(data, BT848_GPIO_DATA);
-
- spin_unlock_irqrestore(&bg->lock, flags);
-
- return 0;
-}
-
-static void bt8xxgpio_gpio_set(struct gpio_chip *gpio,
- unsigned nr, int val)
-{
- struct bt8xxgpio *bg = container_of(gpio, struct bt8xxgpio, gpio);
- unsigned long flags;
- u32 data;
-
- spin_lock_irqsave(&bg->lock, flags);
-
- data = bgread(BT848_GPIO_DATA);
- if (val)
- data |= (1 << nr);
- else
- data &= ~(1 << nr);
- bgwrite(data, BT848_GPIO_DATA);
-
- spin_unlock_irqrestore(&bg->lock, flags);
-}
-
-static void bt8xxgpio_gpio_setup(struct bt8xxgpio *bg)
-{
- struct gpio_chip *c = &bg->gpio;
-
- c->label = dev_name(&bg->pdev->dev);
- c->owner = THIS_MODULE;
- c->direction_input = bt8xxgpio_gpio_direction_input;
- c->get = bt8xxgpio_gpio_get;
- c->direction_output = bt8xxgpio_gpio_direction_output;
- c->set = bt8xxgpio_gpio_set;
- c->dbg_show = NULL;
- c->base = modparam_gpiobase;
- c->ngpio = BT8XXGPIO_NR_GPIOS;
- c->can_sleep = 0;
-}
-
-static int bt8xxgpio_probe(struct pci_dev *dev,
- const struct pci_device_id *pci_id)
-{
- struct bt8xxgpio *bg;
- int err;
-
- bg = kzalloc(sizeof(*bg), GFP_KERNEL);
- if (!bg)
- return -ENOMEM;
-
- bg->pdev = dev;
- spin_lock_init(&bg->lock);
-
- err = pci_enable_device(dev);
- if (err) {
- printk(KERN_ERR "bt8xxgpio: Can't enable device.\n");
- goto err_freebg;
- }
- if (!request_mem_region(pci_resource_start(dev, 0),
- pci_resource_len(dev, 0),
- "bt8xxgpio")) {
- printk(KERN_WARNING "bt8xxgpio: Can't request iomem (0x%llx).\n",
- (unsigned long long)pci_resource_start(dev, 0));
- err = -EBUSY;
- goto err_disable;
- }
- pci_set_master(dev);
- pci_set_drvdata(dev, bg);
-
- bg->mmio = ioremap(pci_resource_start(dev, 0), 0x1000);
- if (!bg->mmio) {
- printk(KERN_ERR "bt8xxgpio: ioremap() failed\n");
- err = -EIO;
- goto err_release_mem;
- }
-
- /* Disable interrupts */
- bgwrite(0, BT848_INT_MASK);
-
- /* gpio init */
- bgwrite(0, BT848_GPIO_DMA_CTL);
- bgwrite(0, BT848_GPIO_REG_INP);
- bgwrite(0, BT848_GPIO_OUT_EN);
-
- bt8xxgpio_gpio_setup(bg);
- err = gpiochip_add(&bg->gpio);
- if (err) {
- printk(KERN_ERR "bt8xxgpio: Failed to register GPIOs\n");
- goto err_release_mem;
- }
-
- printk(KERN_INFO "bt8xxgpio: Abusing BT8xx card for GPIOs %d to %d\n",
- bg->gpio.base, bg->gpio.base + BT8XXGPIO_NR_GPIOS - 1);
-
- return 0;
-
-err_release_mem:
- release_mem_region(pci_resource_start(dev, 0),
- pci_resource_len(dev, 0));
- pci_set_drvdata(dev, NULL);
-err_disable:
- pci_disable_device(dev);
-err_freebg:
- kfree(bg);
-
- return err;
-}
-
-static void bt8xxgpio_remove(struct pci_dev *pdev)
-{
- struct bt8xxgpio *bg = pci_get_drvdata(pdev);
-
- gpiochip_remove(&bg->gpio);
-
- bgwrite(0, BT848_INT_MASK);
- bgwrite(~0x0, BT848_INT_STAT);
- bgwrite(0x0, BT848_GPIO_OUT_EN);
-
- iounmap(bg->mmio);
- release_mem_region(pci_resource_start(pdev, 0),
- pci_resource_len(pdev, 0));
- pci_disable_device(pdev);
-
- pci_set_drvdata(pdev, NULL);
- kfree(bg);
-}
-
-#ifdef CONFIG_PM
-static int bt8xxgpio_suspend(struct pci_dev *pdev, pm_message_t state)
-{
- struct bt8xxgpio *bg = pci_get_drvdata(pdev);
- unsigned long flags;
-
- spin_lock_irqsave(&bg->lock, flags);
-
- bg->saved_outen = bgread(BT848_GPIO_OUT_EN);
- bg->saved_data = bgread(BT848_GPIO_DATA);
-
- bgwrite(0, BT848_INT_MASK);
- bgwrite(~0x0, BT848_INT_STAT);
- bgwrite(0x0, BT848_GPIO_OUT_EN);
-
- spin_unlock_irqrestore(&bg->lock, flags);
-
- pci_save_state(pdev);
- pci_disable_device(pdev);
- pci_set_power_state(pdev, pci_choose_state(pdev, state));
-
- return 0;
-}
-
-static int bt8xxgpio_resume(struct pci_dev *pdev)
-{
- struct bt8xxgpio *bg = pci_get_drvdata(pdev);
- unsigned long flags;
- int err;
-
- pci_set_power_state(pdev, 0);
- err = pci_enable_device(pdev);
- if (err)
- return err;
- pci_restore_state(pdev);
-
- spin_lock_irqsave(&bg->lock, flags);
-
- bgwrite(0, BT848_INT_MASK);
- bgwrite(0, BT848_GPIO_DMA_CTL);
- bgwrite(0, BT848_GPIO_REG_INP);
- bgwrite(bg->saved_outen, BT848_GPIO_OUT_EN);
- bgwrite(bg->saved_data & bg->saved_outen,
- BT848_GPIO_DATA);
-
- spin_unlock_irqrestore(&bg->lock, flags);
-
- return 0;
-}
-#else
-#define bt8xxgpio_suspend NULL
-#define bt8xxgpio_resume NULL
-#endif /* CONFIG_PM */
-
-static struct pci_device_id bt8xxgpio_pci_tbl[] = {
- { PCI_DEVICE(PCI_VENDOR_ID_BROOKTREE, PCI_DEVICE_ID_BT848) },
- { PCI_DEVICE(PCI_VENDOR_ID_BROOKTREE, PCI_DEVICE_ID_BT849) },
- { PCI_DEVICE(PCI_VENDOR_ID_BROOKTREE, PCI_DEVICE_ID_BT878) },
- { PCI_DEVICE(PCI_VENDOR_ID_BROOKTREE, PCI_DEVICE_ID_BT879) },
- { 0, },
-};
-MODULE_DEVICE_TABLE(pci, bt8xxgpio_pci_tbl);
-
-static struct pci_driver bt8xxgpio_pci_driver = {
- .name = "bt8xxgpio",
- .id_table = bt8xxgpio_pci_tbl,
- .probe = bt8xxgpio_probe,
- .remove = bt8xxgpio_remove,
- .suspend = bt8xxgpio_suspend,
- .resume = bt8xxgpio_resume,
-};
-
-static int __init bt8xxgpio_init(void)
-{
- return pci_register_driver(&bt8xxgpio_pci_driver);
-}
-module_init(bt8xxgpio_init)
-
-static void __exit bt8xxgpio_exit(void)
-{
- pci_unregister_driver(&bt8xxgpio_pci_driver);
-}
-module_exit(bt8xxgpio_exit)
-
-MODULE_LICENSE("GPL");
-MODULE_AUTHOR("Michael Buesch");
-MODULE_DESCRIPTION("Abuse a BT8xx framegrabber card as generic GPIO card");
generated by cgit v1.2.3-18-g5258 (git 2.32.0) at 2024-12-11 19:56:59 +0000