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path: root/target/linux/rdc/patches-2.6.30/002-rdc321x_gpio.patch
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Diffstat (limited to 'target/linux/rdc/patches-2.6.30/002-rdc321x_gpio.patch')
-rw-r--r--target/linux/rdc/patches-2.6.30/002-rdc321x_gpio.patch282
1 files changed, 0 insertions, 282 deletions
diff --git a/target/linux/rdc/patches-2.6.30/002-rdc321x_gpio.patch b/target/linux/rdc/patches-2.6.30/002-rdc321x_gpio.patch
deleted file mode 100644
index 592d86a..0000000
--- a/target/linux/rdc/patches-2.6.30/002-rdc321x_gpio.patch
+++ /dev/null
@@ -1,282 +0,0 @@
-This patch adds a new GPIO driver for the RDC321x SoC GPIO controller.
-
-Signed-off-by: Florian Fainelli <florian@openwrt.org>
----
-Changes from v2:
-- initialize spinlock earlier
-- do not declare and assign gpch variables on the same line
-- use the pci_dev pointer passed as platform data
-- replaced rdc321x_pci_{read,write}
-
---- a/drivers/gpio/Kconfig
-+++ b/drivers/gpio/Kconfig
-@@ -161,6 +161,14 @@ config GPIO_BT8XX
-
- If unsure, say N.
-
-+config GPIO_RDC321X
-+ tristate "RDC R-321x GPIO support"
-+ depends on PCI && GPIOLIB
-+ select MFD_RDC321X
-+ help
-+ Support for the RDC R321x SoC GPIOs over southbridge
-+ PCI configuration space.
-+
- comment "SPI GPIO expanders:"
-
- config GPIO_MAX7301
---- a/drivers/gpio/Makefile
-+++ b/drivers/gpio/Makefile
-@@ -12,3 +12,4 @@ obj-$(CONFIG_GPIO_PCF857X) += pcf857x.o
- obj-$(CONFIG_GPIO_TWL4030) += twl4030-gpio.o
- obj-$(CONFIG_GPIO_XILINX) += xilinx_gpio.o
- obj-$(CONFIG_GPIO_BT8XX) += bt8xxgpio.o
-+obj-$(CONFIG_GPIO_RDC321X) += rdc321x-gpio.o
---- /dev/null
-+++ b/drivers/gpio/rdc321x-gpio.c
-@@ -0,0 +1,245 @@
-+/*
-+ * RDC321x GPIO driver
-+ *
-+ * Copyright (C) 2008, Volker Weiss <dev@tintuc.de>
-+ * Copyright (C) 2007-2010 Florian Fainelli <florian@openwrt.org>
-+ *
-+ * 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/kernel.h>
-+#include <linux/init.h>
-+#include <linux/spinlock.h>
-+#include <linux/platform_device.h>
-+#include <linux/pci.h>
-+#include <linux/gpio.h>
-+#include <linux/mfd/rdc321x.h>
-+
-+struct rdc321x_gpio {
-+ spinlock_t lock;
-+ struct pci_dev *sb_pdev;
-+ u32 data_reg[2];
-+ int reg1_ctrl_base;
-+ int reg1_data_base;
-+ int reg2_ctrl_base;
-+ int reg2_data_base;
-+ struct gpio_chip chip;
-+};
-+
-+/* read GPIO pin */
-+static int rdc_gpio_get_value(struct gpio_chip *chip, unsigned gpio)
-+{
-+ struct rdc321x_gpio *gpch;
-+ u32 value = 0;
-+ int reg;
-+
-+ gpch = container_of(chip, struct rdc321x_gpio, chip);
-+ reg = gpio < 32 ? gpch->reg1_data_base : gpch->reg2_data_base;
-+
-+ spin_lock(&gpch->lock);
-+ pci_write_config_dword(gpch->sb_pdev, reg,
-+ gpch->data_reg[gpio < 32 ? 0 : 1]);
-+ pci_read_config_dword(gpch->sb_pdev, reg, &value);
-+ spin_unlock(&gpch->lock);
-+
-+ return (1 << (gpio & 0x1f)) & value ? 1 : 0;
-+}
-+
-+static void rdc_gpio_set_value_impl(struct gpio_chip *chip,
-+ unsigned gpio, int value)
-+{
-+ struct rdc321x_gpio *gpch;
-+ int reg = (gpio < 32) ? 0 : 1;
-+
-+ gpch = container_of(chip, struct rdc321x_gpio, chip);
-+
-+ if (value)
-+ gpch->data_reg[reg] |= 1 << (gpio & 0x1f);
-+ else
-+ gpch->data_reg[reg] &= ~(1 << (gpio & 0x1f));
-+
-+ pci_write_config_dword(gpch->sb_pdev,
-+ reg ? gpch->reg2_data_base : gpch->reg1_data_base,
-+ gpch->data_reg[reg]);
-+}
-+
-+/* set GPIO pin to value */
-+static void rdc_gpio_set_value(struct gpio_chip *chip,
-+ unsigned gpio, int value)
-+{
-+ struct rdc321x_gpio *gpch;
-+
-+ gpch = container_of(chip, struct rdc321x_gpio, chip);
-+ spin_lock(&gpch->lock);
-+ rdc_gpio_set_value_impl(chip, gpio, value);
-+ spin_unlock(&gpch->lock);
-+}
-+
-+static int rdc_gpio_config(struct gpio_chip *chip,
-+ unsigned gpio, int value)
-+{
-+ struct rdc321x_gpio *gpch;
-+ int err;
-+ u32 reg;
-+
-+ gpch = container_of(chip, struct rdc321x_gpio, chip);
-+
-+ spin_lock(&gpch->lock);
-+ err = pci_read_config_dword(gpch->sb_pdev, gpio < 32 ?
-+ gpch->reg1_ctrl_base : gpch->reg2_ctrl_base, &reg);
-+ if (err)
-+ goto unlock;
-+
-+ reg |= 1 << (gpio & 0x1f);
-+
-+ err = pci_write_config_dword(gpch->sb_pdev, gpio < 32 ?
-+ gpch->reg1_ctrl_base : gpch->reg2_ctrl_base, reg);
-+ if (err)
-+ goto unlock;
-+
-+ rdc_gpio_set_value_impl(chip, gpio, value);
-+
-+unlock:
-+ spin_unlock(&gpch->lock);
-+
-+ return err;
-+}
-+
-+/* configure GPIO pin as input */
-+static int rdc_gpio_direction_input(struct gpio_chip *chip, unsigned gpio)
-+{
-+ return rdc_gpio_config(chip, gpio, 1);
-+}
-+
-+/*
-+ * Cache the initial value of both GPIO data registers
-+ */
-+static int __devinit rdc321x_gpio_probe(struct platform_device *pdev)
-+{
-+ int err;
-+ struct resource *r;
-+ struct rdc321x_gpio *rdc321x_gpio_dev;
-+ struct rdc321x_gpio_pdata *pdata;
-+
-+ pdata = pdev->dev.driver_data;
-+ if (!pdata) {
-+ dev_err(&pdev->dev, "no platform data supplied\n");
-+ return -ENODEV;
-+ }
-+
-+ rdc321x_gpio_dev = kzalloc(sizeof(struct rdc321x_gpio), GFP_KERNEL);
-+ if (!rdc321x_gpio_dev) {
-+ dev_err(&pdev->dev, "failed to allocate private data\n");
-+ return -ENOMEM;
-+ }
-+
-+ r = platform_get_resource_byname(pdev, IORESOURCE_IO, "gpio-reg1");
-+ if (!r) {
-+ dev_err(&pdev->dev, "failed to get gpio-reg1 resource\n");
-+ err = -ENODEV;
-+ goto out_free;
-+ }
-+
-+ spin_lock_init(&rdc321x_gpio_dev->lock);
-+ rdc321x_gpio_dev->sb_pdev = pdata->sb_pdev;
-+ rdc321x_gpio_dev->reg1_ctrl_base = r->start;
-+ rdc321x_gpio_dev->reg1_data_base = r->start + 0x4;
-+
-+ r = platform_get_resource_byname(pdev, IORESOURCE_IO, "gpio-reg2");
-+ if (!r) {
-+ dev_err(&pdev->dev, "failed to get gpio-reg2 resource\n");
-+ err = -ENODEV;
-+ goto out_free;
-+ }
-+
-+ rdc321x_gpio_dev->reg2_ctrl_base = r->start;
-+ rdc321x_gpio_dev->reg2_data_base = r->start + 0x4;
-+
-+ rdc321x_gpio_dev->chip.label = "rdc321x-gpio";
-+ rdc321x_gpio_dev->chip.direction_input = rdc_gpio_direction_input;
-+ rdc321x_gpio_dev->chip.direction_output = rdc_gpio_config;
-+ rdc321x_gpio_dev->chip.get = rdc_gpio_get_value;
-+ rdc321x_gpio_dev->chip.set = rdc_gpio_set_value;
-+ rdc321x_gpio_dev->chip.base = 0;
-+ rdc321x_gpio_dev->chip.ngpio = pdata->max_gpios;
-+
-+ platform_set_drvdata(pdev, rdc321x_gpio_dev);
-+
-+ /* This might not be, what others (BIOS, bootloader, etc.)
-+ wrote to these registers before, but it's a good guess. Still
-+ better than just using 0xffffffff. */
-+ err = pci_read_config_dword(rdc321x_gpio_dev->sb_pdev,
-+ rdc321x_gpio_dev->reg1_data_base,
-+ &rdc321x_gpio_dev->data_reg[0]);
-+ if (err)
-+ goto out_drvdata;
-+
-+ err = pci_read_config_dword(rdc321x_gpio_dev->sb_pdev,
-+ rdc321x_gpio_dev->reg2_data_base,
-+ &rdc321x_gpio_dev->data_reg[1]);
-+ if (err)
-+ goto out_drvdata;
-+
-+ dev_info(&pdev->dev, "registering %d GPIOs\n",
-+ rdc321x_gpio_dev->chip.ngpio);
-+ return gpiochip_add(&rdc321x_gpio_dev->chip);
-+
-+out_drvdata:
-+ platform_set_drvdata(pdev, NULL);
-+out_free:
-+ kfree(rdc321x_gpio_dev);
-+ return err;
-+}
-+
-+static int __devexit rdc321x_gpio_remove(struct platform_device *pdev)
-+{
-+ int ret;
-+ struct rdc321x_gpio *rdc321x_gpio_dev = platform_get_drvdata(pdev);
-+
-+ ret = gpiochip_remove(&rdc321x_gpio_dev->chip);
-+ if (ret)
-+ dev_err(&pdev->dev, "failed to unregister chip\n");
-+
-+ kfree(rdc321x_gpio_dev);
-+ platform_set_drvdata(pdev, NULL);
-+
-+ return ret;
-+}
-+
-+static struct platform_driver rdc321x_gpio_driver = {
-+ .driver.name = "rdc321x-gpio",
-+ .driver.owner = THIS_MODULE,
-+ .probe = rdc321x_gpio_probe,
-+ .remove = __devexit_p(rdc321x_gpio_remove),
-+};
-+
-+static int __init rdc321x_gpio_init(void)
-+{
-+ return platform_driver_register(&rdc321x_gpio_driver);
-+}
-+
-+static void __exit rdc321x_gpio_exit(void)
-+{
-+ platform_driver_unregister(&rdc321x_gpio_driver);
-+}
-+
-+module_init(rdc321x_gpio_init);
-+module_exit(rdc321x_gpio_exit);
-+
-+MODULE_AUTHOR("Florian Fainelli <florian@openwrt.org>");
-+MODULE_DESCRIPTION("RDC321x GPIO driver");
-+MODULE_LICENSE("GPL");
-+MODULE_ALIAS("platform:rdc321x-gpio");
generated by cgit v1.1 at 2024-12-24 13:10:39 +0000