#
# Makefile for the RDC321x specific parts of the kernel
#
-obj-$(CONFIG_X86_RDC321X) := gpio.o platform.o
+obj-$(CONFIG_X86_RDC321X) := gpio.o platform.o pci.o
/*
- * GPIO support for RDC SoC R3210/R8610
+ * RDC321x GPIO driver
*
- * Copyright (C) 2007, Florian Fainelli <florian@openwrt.org>
- * Copyright (C) 2008, Volker Weiss <dev@tintuc.de>
+ * 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
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*
*/
-
-
-#include <linux/spinlock.h>
-#include <linux/io.h>
-#include <linux/types.h>
#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 <asm/rdc321x_gpio.h>
#include <asm/rdc321x_defs.h>
+struct rdc321x_gpio {
+ spinlock_t lock;
+ u32 data_reg[2];
+} rdc321x_gpio_dev;
-/* spin lock to protect our private copy of GPIO data register plus
- the access to PCI conf registers. */
-static DEFINE_SPINLOCK(gpio_lock);
+extern int rdc321x_pci_write(int reg, u32 val);
+extern int rdc321x_pci_read(int reg, u32 *val);
-/* copy of GPIO data registers */
-static u32 gpio_data_reg1;
-static u32 gpio_data_reg2;
-
-static inline void rdc321x_conf_write(unsigned addr, u32 value)
-{
- outl((1 << 31) | (7 << 11) | addr, RDC3210_CFGREG_ADDR);
- outl(value, RDC3210_CFGREG_DATA);
-}
-
-static inline void rdc321x_conf_or(unsigned addr, u32 value)
-{
- outl((1 << 31) | (7 << 11) | addr, RDC3210_CFGREG_ADDR);
- value |= inl(RDC3210_CFGREG_DATA);
- outl(value, RDC3210_CFGREG_DATA);
-}
-
-static inline u32 rdc321x_conf_read(unsigned addr)
+/* read GPIO pin */
+static int rdc_gpio_get_value(struct gpio_chip *chip, unsigned gpio)
{
- outl((1 << 31) | (7 << 11) | addr, RDC3210_CFGREG_ADDR);
+ u32 value = 0;
+ int reg;
- return inl(RDC3210_CFGREG_DATA);
-}
+ reg = gpio < 32 ? RDC321X_GPIO_DATA_REG1 : RDC321X_GPIO_DATA_REG2;
-/* configure pin as GPIO */
-static void rdc321x_configure_gpio(unsigned gpio)
-{
- unsigned long flags;
+ spin_lock(&rdc321x_gpio_dev.lock);
+ rdc321x_pci_write(reg, rdc321x_gpio_dev.data_reg[gpio < 32 ? 0 : 1]);
+ rdc321x_pci_read(reg, &value);
+ spin_unlock(&rdc321x_gpio_dev.lock);
- spin_lock_irqsave(&gpio_lock, flags);
- rdc321x_conf_or(gpio < 32
- ? RDC321X_GPIO_CTRL_REG1 : RDC321X_GPIO_CTRL_REG2,
- 1 << (gpio & 0x1f));
- spin_unlock_irqrestore(&gpio_lock, flags);
+ return (1 << (gpio & 0x1f)) & value ? 1 : 0;
}
-/* read GPIO pin */
-static int rdc_gpio_get_value(struct gpio_chip *chip, unsigned gpio)
+static void rdc_gpio_set_value_impl(struct gpio_chip *chip,
+ unsigned gpio, int value)
{
- u32 reg;
- unsigned long flags;
+ int reg = (gpio < 32) ? 0 : 1;
- spin_lock_irqsave(&gpio_lock, flags);
- reg = rdc321x_conf_read(gpio < 32
- ? RDC321X_GPIO_DATA_REG1 : RDC321X_GPIO_DATA_REG2);
- spin_unlock_irqrestore(&gpio_lock, flags);
+ if (value)
+ rdc321x_gpio_dev.data_reg[reg] |= 1 << (gpio & 0x1f);
+ else
+ rdc321x_gpio_dev.data_reg[reg] &= ~(1 << (gpio & 0x1f));
- return (1 << (gpio & 0x1f)) & reg ? 1 : 0;
+ rdc321x_pci_write(reg ? RDC321X_GPIO_DATA_REG2 : RDC321X_GPIO_DATA_REG1,
+ rdc321x_gpio_dev.data_reg[reg]);
}
/* set GPIO pin to value */
static void rdc_gpio_set_value(struct gpio_chip *chip,
unsigned gpio, int value)
{
- unsigned long flags;
- u32 reg;
-
- reg = 1 << (gpio & 0x1f);
- if (gpio < 32) {
- spin_lock_irqsave(&gpio_lock, flags);
- if (value)
- gpio_data_reg1 |= reg;
- else
- gpio_data_reg1 &= ~reg;
- rdc321x_conf_write(RDC321X_GPIO_DATA_REG1, gpio_data_reg1);
- spin_unlock_irqrestore(&gpio_lock, flags);
- } else {
- spin_lock_irqsave(&gpio_lock, flags);
- if (value)
- gpio_data_reg2 |= reg;
- else
- gpio_data_reg2 &= ~reg;
- rdc321x_conf_write(RDC321X_GPIO_DATA_REG2, gpio_data_reg2);
- spin_unlock_irqrestore(&gpio_lock, flags);
- }
+ spin_lock(&rdc321x_gpio_dev.lock);
+ rdc_gpio_set_value_impl(chip, gpio, value);
+ spin_unlock(&rdc321x_gpio_dev.lock);
}
-/* configure GPIO pin as input */
-static int rdc_gpio_direction_input(struct gpio_chip *chip, unsigned gpio)
+static int rdc_gpio_config(struct gpio_chip *chip,
+ unsigned gpio, int value)
{
- rdc321x_configure_gpio(gpio);
+ int err;
+ u32 reg;
- return 0;
+ spin_lock(&rdc321x_gpio_dev.lock);
+ err = rdc321x_pci_read(gpio < 32 ? RDC321X_GPIO_CTRL_REG1 : RDC321X_GPIO_CTRL_REG2,
+ ®);
+ if (err)
+ goto unlock;
+
+ reg |= 1 << (gpio & 0x1f);
+
+ err = rdc321x_pci_write(gpio < 32 ? RDC321X_GPIO_CTRL_REG1 : RDC321X_GPIO_CTRL_REG2,
+ reg);
+ if (err)
+ goto unlock;
+
+ rdc_gpio_set_value_impl(chip, gpio, value);
+
+unlock:
+ spin_unlock(&rdc321x_gpio_dev.lock);
+
+ return err;
}
-/* configure GPIO pin as output and set value */
-static int rdc_gpio_direction_output(struct gpio_chip *chip,
- unsigned gpio, int value)
+/* configure GPIO pin as input */
+static int rdc_gpio_direction_input(struct gpio_chip *chip, unsigned gpio)
{
- rdc321x_configure_gpio(gpio);
- gpio_set_value(gpio, value);
-
- return 0;
+ return rdc_gpio_config(chip, gpio, 1);
}
static struct gpio_chip rdc321x_gpio_chip = {
.label = "rdc321x-gpio",
.direction_input = rdc_gpio_direction_input,
- .direction_output = rdc_gpio_direction_output,
+ .direction_output = rdc_gpio_config,
.get = rdc_gpio_get_value,
.set = rdc_gpio_set_value,
.base = 0,
/* initially setup the 2 copies of the gpio data registers.
This function is called before the platform setup code. */
-static int __init rdc321x_gpio_setup(void)
+static int __devinit rdc321x_gpio_probe(struct platform_device *pdev)
{
+ int err;
+
/* 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 = rdc321x_pci_read(RDC321X_GPIO_DATA_REG1, &rdc321x_gpio_dev.data_reg[0]);
+ if (err)
+ return err;
+
+ err = rdc321x_pci_read(RDC321X_GPIO_DATA_REG2, &rdc321x_gpio_dev.data_reg[1]);
+ if (err)
+ return err;
- gpio_data_reg1 = rdc321x_conf_read(RDC321X_GPIO_DATA_REG1);
- gpio_data_reg2 = rdc321x_conf_read(RDC321X_GPIO_DATA_REG2);
+ spin_lock_init(&rdc321x_gpio_dev.lock);
printk(KERN_INFO "rdc321x: registering %d GPIOs\n", rdc321x_gpio_chip.ngpio);
return gpiochip_add(&rdc321x_gpio_chip);
}
-arch_initcall(rdc321x_gpio_setup);
+static int __devexit rdc321x_gpio_remove(struct platform_device *pdev)
+{
+ gpiochip_remove(&rdc321x_gpio_chip);
+ return 0;
+}
+
+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");
--- /dev/null
+/*
+ * RDC321x southbrige driver
+ *
+ * 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/init.h>
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/platform_device.h>
+#include <linux/pci.h>
+
+#include <asm/rdc321x_defs.h>
+
+static struct pci_dev *rdc321x_sb_pdev;
+
+/*
+ * Unlocked PCI configuration space accessors
+ */
+int rdc321x_pci_read(int reg, u32 *val)
+{
+ int err;
+
+ err = pci_read_config_dword(rdc321x_sb_pdev, reg, val);
+ if (err)
+ return err;
+
+ return err;
+}
+EXPORT_SYMBOL(rdc321x_pci_read);
+
+int rdc321x_pci_write(int reg, u32 val)
+{
+ int err;
+
+ err = pci_write_config_dword(rdc321x_sb_pdev, reg, val);
+ if (err)
+ return err;
+
+ return err;
+}
+EXPORT_SYMBOL(rdc321x_pci_write);
+
+static struct platform_device rdc321x_wdt_device = {
+ .name = "rdc321x-wdt"
+};
+
+static struct platform_device rdc321x_gpio_device = {
+ .name = "rdc321x-gpio"
+};
+
+static int __devinit rdc321x_sb_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
+{
+ int err;
+
+ err = pci_enable_device(pdev);
+ if (err) {
+ printk(KERN_ERR "failed to enable device\n");
+ return err;
+ }
+
+ rdc321x_sb_pdev = pdev;
+
+ err = platform_device_register(&rdc321x_wdt_device);
+ if (err) {
+ dev_err(&pdev->dev, "failed to register watchdog\n");
+ return err;
+ }
+
+ err = platform_device_register(&rdc321x_gpio_device);
+ if (err) {
+ dev_err(&pdev->dev, "failed to register gpiochip\n");
+ return err;
+ }
+ dev_info(&rdc321x_sb_pdev->dev, "RDC321x southhridge registered\n");
+
+ return err;
+}
+
+static struct pci_device_id rdc321x_sb_table[] = {
+ { PCI_DEVICE(PCI_VENDOR_ID_RDC, PCI_DEVICE_ID_RDC_R6030) },
+ {}
+};
+
+static struct pci_driver rdc321x_sb_driver = {
+ .name = "RDC3210 Southbridge",
+ .id_table = rdc321x_sb_table,
+ .probe = rdc321x_sb_probe
+};
+
+static int __init rdc321x_sb_init(void)
+{
+ return pci_register_driver(&rdc321x_sb_driver);
+}
+
+device_initcall(rdc321x_sb_init);
}
};
-/* Watchdog */
-static struct platform_device rdc321x_wdt = {
- .name = "rdc321x-wdt",
- .id = -1,
- .num_resources = 0,
-};
-
/* Button */
static struct gpio_keys_button rdc321x_gpio_btn[] = {
{
static struct platform_device *rdc321x_devs[] = {
&rdc_flash_device,
&rdc321x_leds,
- &rdc321x_wdt,
&rdc321x_button,
};
--- /dev/null
+/*
+ * RDC321x watchdog driver
+ *
+ * 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/miscdevice.h>
+#include <linux/platform_device.h>
+#include <linux/fs.h>
+#include <linux/init.h>
+#include <linux/ioport.h>
+#include <linux/timer.h>
+#include <linux/watchdog.h>
+#include <linux/uaccess.h>
+#include <linux/pci.h>
+
+#include <asm/rdc321x_defs.h>
+
+extern int rdc321x_pci_write(int reg, u32 val);
+extern int rdc321x_pci_read(int reg, u32 *val);
+
+#define RDC321X_WDT_REG 0x00000044
+
+#define RDC_WDT_EN 0x00800000 /* Enable bit */
+#define RDC_WDT_WDTIRQ 0x00400000 /* Create WDT IRQ before CPU reset */
+#define RDC_WDT_NMIIRQ 0x00200000 /* Create NMI IRQ before CPU reset */
+#define RDC_WDT_RST 0x00100000 /* Reset wdt */
+#define RDC_WDT_NIF 0x00080000 /* NMI interrupt occured */
+#define RDC_WDT_WIF 0x00040000 /* WDT interrupt occured */
+#define RDC_WDT_IRT 0x00000700 /* IRQ Routing table */
+#define RDC_WDT_CNT 0x0000007F /* WDT count */
+
+/* default counter value (2.34 s) */
+#define RDC_WDT_DFLT_CNT 0x00000040
+
+#define RDC_WDT_SETUP (RDC_WDT_EN | RDC_WDT_NMIIRQ | RDC_WDT_RST | RDC_WDT_DFLT_CNT)
+
+/* some device data */
+static struct {
+ struct timer_list timer;
+ int seconds_left;
+ int total_seconds;
+ bool inuse;
+ bool running;
+ bool close_expected;
+} rdc321x_wdt_dev;
+
+static struct watchdog_info ident = {
+ .options = WDIOF_SETTIMEOUT | WDIOF_MAGICCLOSE,
+ .identity = "RDC321x WDT",
+};
+
+/* generic helper functions */
+static void rdc321x_wdt_timer(unsigned long unused)
+{
+ if (!rdc321x_wdt_dev.running) {
+ rdc321x_pci_write(RDC321X_WDT_REG, 0);
+ return;
+ }
+
+ rdc321x_wdt_dev.seconds_left--;
+
+ if (rdc321x_wdt_dev.seconds_left < 1)
+ return;
+
+ rdc321x_pci_write(RDC321X_WDT_REG, RDC_WDT_SETUP);
+
+ mod_timer(&rdc321x_wdt_dev.timer, HZ * 2 + jiffies);
+}
+
+static void rdc321x_wdt_reset(void)
+{
+ rdc321x_wdt_dev.seconds_left = rdc321x_wdt_dev.total_seconds;
+}
+
+static void rdc321x_wdt_start(void)
+{
+ if (rdc321x_wdt_dev.running)
+ return;
+
+ rdc321x_wdt_dev.seconds_left = rdc321x_wdt_dev.total_seconds;
+
+ rdc321x_wdt_dev.running = true;
+
+ rdc321x_wdt_timer(0);
+
+ return;
+}
+
+static int rdc321x_wdt_stop(void)
+{
+ if (WATCHDOG_NOWAYOUT)
+ return -ENOSYS;
+
+ rdc321x_wdt_dev.running = false;
+
+ return 0;
+}
+
+/* filesystem operations */
+static int rdc321x_wdt_open(struct inode *inode, struct file *file)
+{
+ if (xchg(&rdc321x_wdt_dev.inuse, true))
+ return -EBUSY;
+
+ return nonseekable_open(inode, file);
+}
+
+static int rdc321x_wdt_release(struct inode *inode, struct file *file)
+{
+ if (rdc321x_wdt_dev.close_expected)
+ rdc321x_wdt_stop();
+
+ rdc321x_wdt_dev.inuse = false;
+
+ return 0;
+}
+
+static long rdc321x_wdt_ioctl(struct file *file, unsigned int cmd,
+ unsigned long arg)
+{
+ void __user *argp = (void __user *)arg;
+ int value;
+
+ switch (cmd) {
+ case WDIOC_KEEPALIVE:
+ rdc321x_wdt_reset();
+ break;
+ case WDIOC_GETSUPPORT:
+ if (copy_to_user(argp, &ident, sizeof(ident)))
+ return -EFAULT;
+ break;
+ case WDIOC_SETTIMEOUT:
+ if (copy_from_user(&rdc321x_wdt_dev.total_seconds, argp, sizeof(int)))
+ return -EFAULT;
+ rdc321x_wdt_dev.seconds_left = rdc321x_wdt_dev.total_seconds;
+ break;
+ case WDIOC_GETTIMEOUT:
+ if (copy_to_user(argp, &rdc321x_wdt_dev.total_seconds, sizeof(int)))
+ return -EFAULT;
+ break;
+ case WDIOC_GETTIMELEFT:
+ if (copy_to_user(argp, &rdc321x_wdt_dev.seconds_left, sizeof(int)))
+ return -EFAULT;
+ break;
+ case WDIOC_SETOPTIONS:
+ if (copy_from_user(&value, argp, sizeof(int)))
+ return -EFAULT;
+ switch (value) {
+ case WDIOS_ENABLECARD:
+ rdc321x_wdt_start();
+ break;
+ case WDIOS_DISABLECARD:
+ return rdc321x_wdt_stop();
+ default:
+ return -EINVAL;
+ }
+ break;
+ default:
+ return -EINVAL;
+ }
+ return 0;
+}
+
+static ssize_t rdc321x_wdt_write(struct file *file, const char __user *buf,
+ size_t count, loff_t *ppos)
+{
+ size_t i;
+
+ if (!count)
+ return -EIO;
+
+ rdc321x_wdt_dev.close_expected = false;
+
+ for (i = 0; i != count; i++) {
+ char c;
+
+ if (get_user(c, buf + i))
+ return -EFAULT;
+
+ if (c == 'V') {
+ rdc321x_wdt_dev.close_expected = true;
+ break;
+ }
+ }
+
+ rdc321x_wdt_reset();
+
+ return count;
+}
+
+static const struct file_operations rdc321x_wdt_fops = {
+ .llseek = no_llseek,
+ .unlocked_ioctl = rdc321x_wdt_ioctl,
+ .open = rdc321x_wdt_open,
+ .write = rdc321x_wdt_write,
+ .release = rdc321x_wdt_release,
+};
+
+static struct miscdevice rdc321x_wdt_misc = {
+ .minor = WATCHDOG_MINOR,
+ .name = "watchdog",
+ .fops = &rdc321x_wdt_fops,
+};
+
+static int __init rdc321x_wdt_probe(struct platform_device *pdev)
+{
+ int err;
+
+ err = rdc321x_pci_write(RDC321X_WDT_REG, 0);
+ if (err)
+ return err;
+
+ rdc321x_wdt_dev.running = false;
+ rdc321x_wdt_dev.close_expected = false;
+ rdc321x_wdt_dev.inuse = 0;
+ setup_timer(&rdc321x_wdt_dev.timer, rdc321x_wdt_timer, 0);
+ rdc321x_wdt_dev.total_seconds = 100;
+
+ err = misc_register(&rdc321x_wdt_misc);
+ if (err < 0) {
+ printk(KERN_ERR PFX "watchdog: misc_register failed\n");
+ return err;
+ }
+
+ panic_on_unrecovered_nmi = 1;
+ dev_info(&pdev->dev, "watchdog inig success\n");
+
+ return 0;
+}
+
+static int __devexit rdc321x_wdt_remove(struct platform_device *pdev)
+{
+ if (rdc321x_wdt_dev.inuse)
+ rdc321x_wdt_dev.inuse = 0;
+ misc_deregister(&rdc321x_wdt_misc);
+ return 0;
+}
+
+static struct platform_driver rdc321x_wdt_driver = {
+ .driver.name = "rdc321x-wdt",
+ .driver.owner = THIS_MODULE,
+ .probe = rdc321x_wdt_probe,
+ .remove = __devexit_p(rdc321x_wdt_remove),
+};
+
+static int __init rdc321x_wdt_init(void)
+{
+ return platform_driver_register(&rdc321x_wdt_driver);
+}
+
+static void __exit rdc321x_wdt_exit(void)
+{
+ platform_driver_unregister(&rdc321x_wdt_driver);
+}
+
+module_init(rdc321x_wdt_init);
+module_exit(rdc321x_wdt_exit);
+
+MODULE_AUTHOR("Florian Fainelli <florian@openwrt.org>");
+MODULE_DESCRIPTION("RDC321x Watchdog driver");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS("platform:rdc321x-wdt");
projects / openwrt / staging / florian.git / commitdiff