This also fixes the watchdog logic and abstracts the access to the RDC321x southbridge PCI configuration register space. Based on a patch by Bernhard Loos. SVN-Revision: 19972master
parent
c6c8012c60
commit
c126808243
@ -1,5 +1,5 @@ |
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#
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#
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# Makefile for the RDC321x specific parts of the kernel
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# Makefile for the RDC321x specific parts of the kernel
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#
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#
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obj-$(CONFIG_X86_RDC321X) := gpio.o platform.o
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obj-$(CONFIG_X86_RDC321X) := gpio.o platform.o pci.o
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@ -0,0 +1,110 @@ |
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/*
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* RDC321x southbrige driver |
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* |
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* Copyright (C) 2007-2010 Florian Fainelli <florian@openwrt.org> |
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* |
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* This program is free software; you can redistribute it and/or modify |
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* it under the terms of the GNU General Public License as published by |
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* the Free Software Foundation; either version 2 of the License, or |
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* (at your option) any later version. |
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* |
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* This program is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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* GNU General Public License for more details. |
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* |
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* You should have received a copy of the GNU General Public License |
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* along with this program; if not, write to the Free Software |
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
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* |
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*/ |
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#include <linux/init.h> |
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#include <linux/module.h> |
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#include <linux/kernel.h> |
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#include <linux/platform_device.h> |
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#include <linux/pci.h> |
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#include <asm/rdc321x_defs.h> |
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static struct pci_dev *rdc321x_sb_pdev; |
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/*
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* Unlocked PCI configuration space accessors |
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*/ |
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int rdc321x_pci_read(int reg, u32 *val) |
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{ |
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int err; |
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err = pci_read_config_dword(rdc321x_sb_pdev, reg, val); |
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if (err) |
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return err; |
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return err; |
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} |
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EXPORT_SYMBOL(rdc321x_pci_read); |
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int rdc321x_pci_write(int reg, u32 val) |
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{ |
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int err; |
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err = pci_write_config_dword(rdc321x_sb_pdev, reg, val); |
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if (err) |
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return err; |
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return err; |
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} |
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EXPORT_SYMBOL(rdc321x_pci_write); |
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static struct platform_device rdc321x_wdt_device = { |
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.name = "rdc321x-wdt" |
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}; |
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static struct platform_device rdc321x_gpio_device = { |
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.name = "rdc321x-gpio" |
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}; |
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static int __devinit rdc321x_sb_probe(struct pci_dev *pdev, const struct pci_device_id *ent) |
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{ |
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int err; |
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err = pci_enable_device(pdev); |
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if (err) { |
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printk(KERN_ERR "failed to enable device\n"); |
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return err; |
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} |
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rdc321x_sb_pdev = pdev; |
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err = platform_device_register(&rdc321x_wdt_device); |
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if (err) { |
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dev_err(&pdev->dev, "failed to register watchdog\n"); |
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return err; |
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} |
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err = platform_device_register(&rdc321x_gpio_device); |
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if (err) { |
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dev_err(&pdev->dev, "failed to register gpiochip\n"); |
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return err; |
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} |
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dev_info(&rdc321x_sb_pdev->dev, "RDC321x southhridge registered\n"); |
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return err; |
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} |
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static struct pci_device_id rdc321x_sb_table[] = { |
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{ PCI_DEVICE(PCI_VENDOR_ID_RDC, PCI_DEVICE_ID_RDC_R6030) }, |
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{} |
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}; |
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static struct pci_driver rdc321x_sb_driver = { |
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.name = "RDC3210 Southbridge", |
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.id_table = rdc321x_sb_table, |
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.probe = rdc321x_sb_probe |
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}; |
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static int __init rdc321x_sb_init(void) |
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{ |
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return pci_register_driver(&rdc321x_sb_driver); |
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} |
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device_initcall(rdc321x_sb_init); |
@ -0,0 +1,278 @@ |
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/*
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* RDC321x watchdog driver |
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* |
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* Copyright (C) 2007-2010 Florian Fainelli <florian@openwrt.org> |
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* |
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* This program is free software; you can redistribute it and/or modify |
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* it under the terms of the GNU General Public License as published by |
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* the Free Software Foundation; either version 2 of the License, or |
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* (at your option) any later version. |
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* |
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* This program is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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* GNU General Public License for more details. |
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* |
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* You should have received a copy of the GNU General Public License |
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* along with this program; if not, write to the Free Software |
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
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* |
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*/ |
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#include <linux/miscdevice.h> |
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#include <linux/platform_device.h> |
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#include <linux/fs.h> |
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#include <linux/init.h> |
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#include <linux/ioport.h> |
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#include <linux/timer.h> |
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#include <linux/watchdog.h> |
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#include <linux/uaccess.h> |
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#include <linux/pci.h> |
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#include <asm/rdc321x_defs.h> |
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extern int rdc321x_pci_write(int reg, u32 val); |
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extern int rdc321x_pci_read(int reg, u32 *val); |
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#define RDC321X_WDT_REG 0x00000044 |
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#define RDC_WDT_EN 0x00800000 /* Enable bit */ |
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#define RDC_WDT_WDTIRQ 0x00400000 /* Create WDT IRQ before CPU reset */ |
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#define RDC_WDT_NMIIRQ 0x00200000 /* Create NMI IRQ before CPU reset */ |
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#define RDC_WDT_RST 0x00100000 /* Reset wdt */ |
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#define RDC_WDT_NIF 0x00080000 /* NMI interrupt occured */ |
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#define RDC_WDT_WIF 0x00040000 /* WDT interrupt occured */ |
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#define RDC_WDT_IRT 0x00000700 /* IRQ Routing table */ |
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#define RDC_WDT_CNT 0x0000007F /* WDT count */ |
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/* default counter value (2.34 s) */ |
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#define RDC_WDT_DFLT_CNT 0x00000040 |
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#define RDC_WDT_SETUP (RDC_WDT_EN | RDC_WDT_NMIIRQ | RDC_WDT_RST | RDC_WDT_DFLT_CNT) |
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/* some device data */ |
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static struct { |
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struct timer_list timer; |
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int seconds_left; |
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int total_seconds; |
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bool inuse; |
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bool running; |
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bool close_expected; |
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} rdc321x_wdt_dev; |
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static struct watchdog_info ident = { |
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.options = WDIOF_SETTIMEOUT | WDIOF_MAGICCLOSE, |
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.identity = "RDC321x WDT", |
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}; |
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/* generic helper functions */ |
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static void rdc321x_wdt_timer(unsigned long unused) |
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{ |
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if (!rdc321x_wdt_dev.running) { |
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rdc321x_pci_write(RDC321X_WDT_REG, 0); |
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return; |
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} |
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rdc321x_wdt_dev.seconds_left--; |
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if (rdc321x_wdt_dev.seconds_left < 1) |
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return; |
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rdc321x_pci_write(RDC321X_WDT_REG, RDC_WDT_SETUP); |
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mod_timer(&rdc321x_wdt_dev.timer, HZ * 2 + jiffies); |
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} |
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static void rdc321x_wdt_reset(void) |
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{ |
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rdc321x_wdt_dev.seconds_left = rdc321x_wdt_dev.total_seconds; |
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} |
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static void rdc321x_wdt_start(void) |
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{ |
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if (rdc321x_wdt_dev.running) |
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return; |
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rdc321x_wdt_dev.seconds_left = rdc321x_wdt_dev.total_seconds; |
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rdc321x_wdt_dev.running = true; |
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rdc321x_wdt_timer(0); |
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return; |
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} |
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static int rdc321x_wdt_stop(void) |
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{ |
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if (WATCHDOG_NOWAYOUT) |
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return -ENOSYS; |
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rdc321x_wdt_dev.running = false; |
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return 0; |
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} |
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/* filesystem operations */ |
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static int rdc321x_wdt_open(struct inode *inode, struct file *file) |
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{ |
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if (xchg(&rdc321x_wdt_dev.inuse, true)) |
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return -EBUSY; |
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return nonseekable_open(inode, file); |
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} |
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static int rdc321x_wdt_release(struct inode *inode, struct file *file) |
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{ |
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if (rdc321x_wdt_dev.close_expected) |
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rdc321x_wdt_stop(); |
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rdc321x_wdt_dev.inuse = false; |
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return 0; |
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} |
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static long rdc321x_wdt_ioctl(struct file *file, unsigned int cmd, |
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unsigned long arg) |
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{ |
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void __user *argp = (void __user *)arg; |
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int value; |
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switch (cmd) { |
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case WDIOC_KEEPALIVE: |
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rdc321x_wdt_reset(); |
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break; |
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case WDIOC_GETSUPPORT: |
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if (copy_to_user(argp, &ident, sizeof(ident))) |
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return -EFAULT; |
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break; |
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case WDIOC_SETTIMEOUT: |
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if (copy_from_user(&rdc321x_wdt_dev.total_seconds, argp, sizeof(int))) |
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return -EFAULT; |
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rdc321x_wdt_dev.seconds_left = rdc321x_wdt_dev.total_seconds; |
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break; |
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case WDIOC_GETTIMEOUT: |
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if (copy_to_user(argp, &rdc321x_wdt_dev.total_seconds, sizeof(int))) |
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return -EFAULT; |
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break; |
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case WDIOC_GETTIMELEFT: |
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if (copy_to_user(argp, &rdc321x_wdt_dev.seconds_left, sizeof(int))) |
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return -EFAULT; |
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break; |
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case WDIOC_SETOPTIONS: |
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if (copy_from_user(&value, argp, sizeof(int))) |
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return -EFAULT; |
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switch (value) { |
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case WDIOS_ENABLECARD: |
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rdc321x_wdt_start(); |
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break; |
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case WDIOS_DISABLECARD: |
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return rdc321x_wdt_stop(); |
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default: |
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return -EINVAL; |
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} |
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break; |
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default: |
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return -EINVAL; |
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} |
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return 0; |
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} |
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static ssize_t rdc321x_wdt_write(struct file *file, const char __user *buf, |
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size_t count, loff_t *ppos) |
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{ |
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size_t i; |
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if (!count) |
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return -EIO; |
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rdc321x_wdt_dev.close_expected = false; |
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for (i = 0; i != count; i++) { |
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char c; |
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if (get_user(c, buf + i)) |
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return -EFAULT; |
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if (c == 'V') { |
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rdc321x_wdt_dev.close_expected = true; |
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break; |
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} |
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} |
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rdc321x_wdt_reset(); |
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return count; |
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} |
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static const struct file_operations rdc321x_wdt_fops = { |
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.llseek = no_llseek, |
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.unlocked_ioctl = rdc321x_wdt_ioctl, |
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.open = rdc321x_wdt_open, |
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.write = rdc321x_wdt_write, |
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.release = rdc321x_wdt_release, |
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}; |
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static struct miscdevice rdc321x_wdt_misc = { |
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.minor = WATCHDOG_MINOR, |
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.name = "watchdog", |
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.fops = &rdc321x_wdt_fops, |
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}; |
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static int __init rdc321x_wdt_probe(struct platform_device *pdev) |
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{ |
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int err; |
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err = rdc321x_pci_write(RDC321X_WDT_REG, 0); |
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if (err) |
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return err; |
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rdc321x_wdt_dev.running = false; |
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rdc321x_wdt_dev.close_expected = false; |
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rdc321x_wdt_dev.inuse = 0; |
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setup_timer(&rdc321x_wdt_dev.timer, rdc321x_wdt_timer, 0); |
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rdc321x_wdt_dev.total_seconds = 100; |
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err = misc_register(&rdc321x_wdt_misc); |
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if (err < 0) { |
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printk(KERN_ERR PFX "watchdog: misc_register failed\n"); |
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return err; |
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} |
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panic_on_unrecovered_nmi = 1; |
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dev_info(&pdev->dev, "watchdog inig success\n"); |
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return 0; |
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} |
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static int __devexit rdc321x_wdt_remove(struct platform_device *pdev) |
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{ |
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if (rdc321x_wdt_dev.inuse) |
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rdc321x_wdt_dev.inuse = 0; |
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misc_deregister(&rdc321x_wdt_misc); |
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return 0; |
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} |
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static struct platform_driver rdc321x_wdt_driver = { |
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.driver.name = "rdc321x-wdt", |
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.driver.owner = THIS_MODULE, |
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.probe = rdc321x_wdt_probe, |
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.remove = __devexit_p(rdc321x_wdt_remove), |
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}; |
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static int __init rdc321x_wdt_init(void) |
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{ |
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return platform_driver_register(&rdc321x_wdt_driver); |
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} |
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static void __exit rdc321x_wdt_exit(void) |
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{ |
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platform_driver_unregister(&rdc321x_wdt_driver); |
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} |
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module_init(rdc321x_wdt_init); |
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module_exit(rdc321x_wdt_exit); |
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MODULE_AUTHOR("Florian Fainelli <florian@openwrt.org>"); |
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MODULE_DESCRIPTION("RDC321x Watchdog driver"); |
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MODULE_LICENSE("GPL"); |
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MODULE_ALIAS("platform:rdc321x-wdt"); |
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