diff options
Diffstat (limited to 'target/linux/rdc/patches-2.6.32/002-rdc321x_gpio.patch')
| -rw-r--r-- | target/linux/rdc/patches-2.6.32/002-rdc321x_gpio.patch | 282 |
1 files changed, 0 insertions, 282 deletions
diff --git a/target/linux/rdc/patches-2.6.32/002-rdc321x_gpio.patch b/target/linux/rdc/patches-2.6.32/002-rdc321x_gpio.patch deleted file mode 100644 index 42ad6aa64..000000000 --- a/target/linux/rdc/patches-2.6.32/002-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 -@@ -196,6 +196,14 @@ config GPIO_LANGWELL - help - Say Y here to support Intel Moorestown platform GPIO. - -+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 -@@ -19,3 +19,4 @@ obj-$(CONFIG_GPIO_XILINX) += xilinx_gpio - obj-$(CONFIG_GPIO_BT8XX) += bt8xxgpio.o - obj-$(CONFIG_GPIO_VR41XX) += vr41xx_giu.o - obj-$(CONFIG_GPIO_WM831X) += wm831x-gpio.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, ®); -+ 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 = platform_get_drvdata(pdev); -+ 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"); |