Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1764973AbXLRCj4 (ORCPT ); Mon, 17 Dec 2007 21:39:56 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1754580AbXLRCjc (ORCPT ); Mon, 17 Dec 2007 21:39:32 -0500 Received: from vms040pub.verizon.net ([206.46.252.40]:45161 "EHLO vms040pub.verizon.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753803AbXLRCja (ORCPT ); Mon, 17 Dec 2007 21:39:30 -0500 Date: Mon, 17 Dec 2007 21:39:15 -0500 From: Jon Smirl Subject: [PATCH 1/7] Copy mpc-i2c to preserve support for ARCH=ppc and allow changes on ARCH=powerpc In-reply-to: <20071218023913.8530.46661.stgit@terra.home> To: i2c@lm-sensors.org, linuxppc-dev@ozlabs.org, linux-kernel@vger.kernel.org Message-id: <20071218023915.8530.67500.stgit@terra.home> MIME-version: 1.0 Content-type: text/plain; charset=utf-8 Content-transfer-encoding: 7bit References: <20071218023913.8530.46661.stgit@terra.home> User-Agent: StGIT/0.13 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 17507 Lines: 618 Temporarily copy the mpc-i2c driver to continue support for the ppc architecture until it is removed in mid-2008. This file should be deleted as part of ppc's final removal. Signed-off-by: Jon Smirl Signed-off-by: Jon Smirl Signed-off-by: Jon Smirl --- arch/ppc/configs/TQM8540_defconfig | 2 arch/ppc/configs/TQM8541_defconfig | 2 arch/ppc/configs/TQM8555_defconfig | 2 arch/ppc/configs/TQM8560_defconfig | 2 arch/ppc/configs/mpc834x_sys_defconfig | 2 arch/ppc/configs/mpc8540_ads_defconfig | 2 arch/ppc/configs/mpc8548_cds_defconfig | 2 arch/ppc/configs/mpc8555_cds_defconfig | 2 arch/ppc/configs/mpc8560_ads_defconfig | 2 drivers/i2c/busses/Kconfig | 16 + drivers/i2c/busses/Makefile | 1 drivers/i2c/busses/i2c-mpc-ppc.c | 418 ++++++++++++++++++++++++++++++++ 12 files changed, 443 insertions(+), 10 deletions(-) create mode 100644 drivers/i2c/busses/i2c-mpc-ppc.c diff --git a/arch/ppc/configs/TQM8540_defconfig b/arch/ppc/configs/TQM8540_defconfig index f33f0e7..7098ed0 100644 --- a/arch/ppc/configs/TQM8540_defconfig +++ b/arch/ppc/configs/TQM8540_defconfig @@ -684,7 +684,7 @@ CONFIG_I2C_CHARDEV=y # CONFIG_I2C_I801 is not set # CONFIG_I2C_I810 is not set # CONFIG_I2C_PIIX4 is not set -CONFIG_I2C_MPC=y +CONFIG_I2C_MPC_PPC=y # CONFIG_I2C_NFORCE2 is not set # CONFIG_I2C_PARPORT_LIGHT is not set # CONFIG_I2C_PROSAVAGE is not set diff --git a/arch/ppc/configs/TQM8541_defconfig b/arch/ppc/configs/TQM8541_defconfig index e00cd62..2137d01 100644 --- a/arch/ppc/configs/TQM8541_defconfig +++ b/arch/ppc/configs/TQM8541_defconfig @@ -687,7 +687,7 @@ CONFIG_I2C_CHARDEV=y # CONFIG_I2C_I801 is not set # CONFIG_I2C_I810 is not set # CONFIG_I2C_PIIX4 is not set -CONFIG_I2C_MPC=y +CONFIG_I2C_MPC_PPC=y # CONFIG_I2C_MPC8260 is not set # CONFIG_I2C_NFORCE2 is not set # CONFIG_I2C_PARPORT_LIGHT is not set diff --git a/arch/ppc/configs/TQM8555_defconfig b/arch/ppc/configs/TQM8555_defconfig index 43a0d9d..f2317b6 100644 --- a/arch/ppc/configs/TQM8555_defconfig +++ b/arch/ppc/configs/TQM8555_defconfig @@ -687,7 +687,7 @@ CONFIG_I2C_CHARDEV=y # CONFIG_I2C_I801 is not set # CONFIG_I2C_I810 is not set # CONFIG_I2C_PIIX4 is not set -CONFIG_I2C_MPC=y +CONFIG_I2C_MPC_PPC=y # CONFIG_I2C_NFORCE2 is not set # CONFIG_I2C_PARPORT_LIGHT is not set # CONFIG_I2C_PROSAVAGE is not set diff --git a/arch/ppc/configs/TQM8560_defconfig b/arch/ppc/configs/TQM8560_defconfig index a814d17..6c19121 100644 --- a/arch/ppc/configs/TQM8560_defconfig +++ b/arch/ppc/configs/TQM8560_defconfig @@ -694,7 +694,7 @@ CONFIG_I2C_CHARDEV=y # CONFIG_I2C_I801 is not set # CONFIG_I2C_I810 is not set # CONFIG_I2C_PIIX4 is not set -CONFIG_I2C_MPC=y +CONFIG_I2C_MPC_PPC=y # CONFIG_I2C_MPC8260 is not set # CONFIG_I2C_NFORCE2 is not set # CONFIG_I2C_PARPORT_LIGHT is not set diff --git a/arch/ppc/configs/mpc834x_sys_defconfig b/arch/ppc/configs/mpc834x_sys_defconfig index d90c8a7..cd568d2 100644 --- a/arch/ppc/configs/mpc834x_sys_defconfig +++ b/arch/ppc/configs/mpc834x_sys_defconfig @@ -562,7 +562,7 @@ CONFIG_I2C_CHARDEV=y # CONFIG_I2C_I801 is not set # CONFIG_I2C_I810 is not set # CONFIG_I2C_PIIX4 is not set -CONFIG_I2C_MPC=y +CONFIG_I2C_MPC_PPC=y # CONFIG_I2C_NFORCE2 is not set # CONFIG_I2C_PARPORT_LIGHT is not set # CONFIG_I2C_PROSAVAGE is not set diff --git a/arch/ppc/configs/mpc8540_ads_defconfig b/arch/ppc/configs/mpc8540_ads_defconfig index bf676eb..5819835 100644 --- a/arch/ppc/configs/mpc8540_ads_defconfig +++ b/arch/ppc/configs/mpc8540_ads_defconfig @@ -452,7 +452,7 @@ CONFIG_I2C_CHARDEV=y # CONFIG_I2C_AMD8111 is not set # CONFIG_I2C_I801 is not set # CONFIG_I2C_I810 is not set -CONFIG_I2C_MPC=y +CONFIG_I2C_MPC_PPC=y # CONFIG_I2C_NFORCE2 is not set # CONFIG_I2C_PARPORT_LIGHT is not set # CONFIG_I2C_PIIX4 is not set diff --git a/arch/ppc/configs/mpc8548_cds_defconfig b/arch/ppc/configs/mpc8548_cds_defconfig index f36fc5d..e5b5071 100644 --- a/arch/ppc/configs/mpc8548_cds_defconfig +++ b/arch/ppc/configs/mpc8548_cds_defconfig @@ -413,7 +413,7 @@ CONFIG_I2C_CHARDEV=y # # I2C Hardware Bus support # -CONFIG_I2C_MPC=y +CONFIG_I2C_MPC_PPC=y # CONFIG_I2C_PARPORT_LIGHT is not set # CONFIG_I2C_PCA_ISA is not set diff --git a/arch/ppc/configs/mpc8555_cds_defconfig b/arch/ppc/configs/mpc8555_cds_defconfig index 4f1e320..08dbab0 100644 --- a/arch/ppc/configs/mpc8555_cds_defconfig +++ b/arch/ppc/configs/mpc8555_cds_defconfig @@ -518,7 +518,7 @@ CONFIG_I2C_CHARDEV=y # CONFIG_I2C_I801 is not set # CONFIG_I2C_I810 is not set # CONFIG_I2C_PIIX4 is not set -CONFIG_I2C_MPC=y +CONFIG_I2C_MPC_PPC=y # CONFIG_I2C_NFORCE2 is not set # CONFIG_I2C_PARPORT_LIGHT is not set # CONFIG_I2C_PROSAVAGE is not set diff --git a/arch/ppc/configs/mpc8560_ads_defconfig b/arch/ppc/configs/mpc8560_ads_defconfig index f12d48f..0e0080b 100644 --- a/arch/ppc/configs/mpc8560_ads_defconfig +++ b/arch/ppc/configs/mpc8560_ads_defconfig @@ -489,7 +489,7 @@ CONFIG_I2C_CHARDEV=y # CONFIG_I2C_I801 is not set # CONFIG_I2C_I810 is not set # CONFIG_I2C_PIIX4 is not set -CONFIG_I2C_MPC=y +CONFIG_I2C_MPC_PPC=y # CONFIG_I2C_NFORCE2 is not set # CONFIG_I2C_PARPORT_LIGHT is not set # CONFIG_I2C_PROSAVAGE is not set diff --git a/drivers/i2c/busses/Kconfig b/drivers/i2c/busses/Kconfig index c466c6c..c5ad557 100644 --- a/drivers/i2c/busses/Kconfig +++ b/drivers/i2c/busses/Kconfig @@ -301,7 +301,7 @@ config I2C_POWERMAC config I2C_MPC tristate "MPC107/824x/85xx/52xx/86xx" - depends on PPC32 + depends on PPC32 && PPC_MERGE help If you say yes to this option, support will be included for the built-in I2C interface on the MPC107/Tsi107/MPC8240/MPC8245 and @@ -311,6 +311,20 @@ config I2C_MPC This driver can also be built as a module. If so, the module will be called i2c-mpc. +config I2C_MPC_PPC + tristate "MPC107/824x/85xx/52xx/86xx" + depends on PPC32 && !PPC_MERGE + help + If you say yes to this option, support will be included for the + built-in I2C interface on the MPC107/Tsi107/MPC8240/MPC8245 and + MPC85xx/MPC8641 family processors. The driver may also work on 52xx + family processors, though interrupts are known not to work. + + This version of the driver is scheduled for deletion with the PPC architecture. + + This driver can also be built as a module. If so, the module + will be called i2c-mpc. + config I2C_NFORCE2 tristate "Nvidia nForce2, nForce3 and nForce4" depends on PCI diff --git a/drivers/i2c/busses/Makefile b/drivers/i2c/busses/Makefile index 81d43c2..b7fe095 100644 --- a/drivers/i2c/busses/Makefile +++ b/drivers/i2c/busses/Makefile @@ -23,6 +23,7 @@ obj-$(CONFIG_I2C_IXP2000) += i2c-ixp2000.o obj-$(CONFIG_I2C_IXP4XX) += i2c-ixp4xx.o obj-$(CONFIG_I2C_POWERMAC) += i2c-powermac.o obj-$(CONFIG_I2C_MPC) += i2c-mpc.o +obj-$(CONFIG_I2C_MPC_PPC) += i2c-mpc-ppc.o obj-$(CONFIG_I2C_MV64XXX) += i2c-mv64xxx.o obj-$(CONFIG_I2C_NFORCE2) += i2c-nforce2.o obj-$(CONFIG_I2C_OCORES) += i2c-ocores.o diff --git a/drivers/i2c/busses/i2c-mpc-ppc.c b/drivers/i2c/busses/i2c-mpc-ppc.c new file mode 100644 index 0000000..d8de4ac --- /dev/null +++ b/drivers/i2c/busses/i2c-mpc-ppc.c @@ -0,0 +1,418 @@ +/* + * (C) Copyright 2003-2004 + * Humboldt Solutions Ltd, adrian@humboldt.co.uk. + + * This is a combined i2c adapter and algorithm driver for the + * MPC107/Tsi107 PowerPC northbridge and processors that include + * the same I2C unit (8240, 8245, 85xx). + * + * Release 0.8 + * + * This file is licensed under the terms of the GNU General Public + * License version 2. This program is licensed "as is" without any + * warranty of any kind, whether express or implied. + */ + +#include +#include +#include +#include +#include + +#include +#include +#include +#include +#include + +#define MPC_I2C_ADDR 0x00 +#define MPC_I2C_FDR 0x04 +#define MPC_I2C_CR 0x08 +#define MPC_I2C_SR 0x0c +#define MPC_I2C_DR 0x10 +#define MPC_I2C_DFSRR 0x14 +#define MPC_I2C_REGION 0x20 + +#define CCR_MEN 0x80 +#define CCR_MIEN 0x40 +#define CCR_MSTA 0x20 +#define CCR_MTX 0x10 +#define CCR_TXAK 0x08 +#define CCR_RSTA 0x04 + +#define CSR_MCF 0x80 +#define CSR_MAAS 0x40 +#define CSR_MBB 0x20 +#define CSR_MAL 0x10 +#define CSR_SRW 0x04 +#define CSR_MIF 0x02 +#define CSR_RXAK 0x01 + +struct mpc_i2c { + void __iomem *base; + u32 interrupt; + wait_queue_head_t queue; + struct i2c_adapter adap; + int irq; + u32 flags; +}; + +static __inline__ void writeccr(struct mpc_i2c *i2c, u32 x) +{ + writeb(x, i2c->base + MPC_I2C_CR); +} + +static irqreturn_t mpc_i2c_isr(int irq, void *dev_id) +{ + struct mpc_i2c *i2c = dev_id; + if (readb(i2c->base + MPC_I2C_SR) & CSR_MIF) { + /* Read again to allow register to stabilise */ + i2c->interrupt = readb(i2c->base + MPC_I2C_SR); + writeb(0, i2c->base + MPC_I2C_SR); + wake_up_interruptible(&i2c->queue); + } + return IRQ_HANDLED; +} + +/* Sometimes 9th clock pulse isn't generated, and slave doesn't release + * the bus, because it wants to send ACK. + * Following sequence of enabling/disabling and sending start/stop generates + * the pulse, so it's all OK. + */ +static void mpc_i2c_fixup(struct mpc_i2c *i2c) +{ + writeccr(i2c, 0); + udelay(30); + writeccr(i2c, CCR_MEN); + udelay(30); + writeccr(i2c, CCR_MSTA | CCR_MTX); + udelay(30); + writeccr(i2c, CCR_MSTA | CCR_MTX | CCR_MEN); + udelay(30); + writeccr(i2c, CCR_MEN); + udelay(30); +} + +static int i2c_wait(struct mpc_i2c *i2c, unsigned timeout, int writing) +{ + unsigned long orig_jiffies = jiffies; + u32 x; + int result = 0; + + if (i2c->irq == 0) + { + while (!(readb(i2c->base + MPC_I2C_SR) & CSR_MIF)) { + schedule(); + if (time_after(jiffies, orig_jiffies + timeout)) { + pr_debug("I2C: timeout\n"); + writeccr(i2c, 0); + result = -EIO; + break; + } + } + x = readb(i2c->base + MPC_I2C_SR); + writeb(0, i2c->base + MPC_I2C_SR); + } else { + /* Interrupt mode */ + result = wait_event_interruptible_timeout(i2c->queue, + (i2c->interrupt & CSR_MIF), timeout * HZ); + + if (unlikely(result < 0)) { + pr_debug("I2C: wait interrupted\n"); + writeccr(i2c, 0); + } else if (unlikely(!(i2c->interrupt & CSR_MIF))) { + pr_debug("I2C: wait timeout\n"); + writeccr(i2c, 0); + result = -ETIMEDOUT; + } + + x = i2c->interrupt; + i2c->interrupt = 0; + } + + if (result < 0) + return result; + + if (!(x & CSR_MCF)) { + pr_debug("I2C: unfinished\n"); + return -EIO; + } + + if (x & CSR_MAL) { + pr_debug("I2C: MAL\n"); + return -EIO; + } + + if (writing && (x & CSR_RXAK)) { + pr_debug("I2C: No RXAK\n"); + /* generate stop */ + writeccr(i2c, CCR_MEN); + return -EIO; + } + return 0; +} + +static void mpc_i2c_setclock(struct mpc_i2c *i2c) +{ + /* Set clock and filters */ + if (i2c->flags & FSL_I2C_DEV_SEPARATE_DFSRR) { + writeb(0x31, i2c->base + MPC_I2C_FDR); + writeb(0x10, i2c->base + MPC_I2C_DFSRR); + } else if (i2c->flags & FSL_I2C_DEV_CLOCK_5200) + writeb(0x3f, i2c->base + MPC_I2C_FDR); + else + writel(0x1031, i2c->base + MPC_I2C_FDR); +} + +static void mpc_i2c_start(struct mpc_i2c *i2c) +{ + /* Clear arbitration */ + writeb(0, i2c->base + MPC_I2C_SR); + /* Start with MEN */ + writeccr(i2c, CCR_MEN); +} + +static void mpc_i2c_stop(struct mpc_i2c *i2c) +{ + writeccr(i2c, CCR_MEN); +} + +static int mpc_write(struct mpc_i2c *i2c, int target, + const u8 * data, int length, int restart) +{ + int i; + unsigned timeout = i2c->adap.timeout; + u32 flags = restart ? CCR_RSTA : 0; + + /* Start with MEN */ + if (!restart) + writeccr(i2c, CCR_MEN); + /* Start as master */ + writeccr(i2c, CCR_MIEN | CCR_MEN | CCR_MSTA | CCR_MTX | flags); + /* Write target byte */ + writeb((target << 1), i2c->base + MPC_I2C_DR); + + if (i2c_wait(i2c, timeout, 1) < 0) + return -1; + + for (i = 0; i < length; i++) { + /* Write data byte */ + writeb(data[i], i2c->base + MPC_I2C_DR); + + if (i2c_wait(i2c, timeout, 1) < 0) + return -1; + } + + return 0; +} + +static int mpc_read(struct mpc_i2c *i2c, int target, + u8 * data, int length, int restart) +{ + unsigned timeout = i2c->adap.timeout; + int i; + u32 flags = restart ? CCR_RSTA : 0; + + /* Start with MEN */ + if (!restart) + writeccr(i2c, CCR_MEN); + /* Switch to read - restart */ + writeccr(i2c, CCR_MIEN | CCR_MEN | CCR_MSTA | CCR_MTX | flags); + /* Write target address byte - this time with the read flag set */ + writeb((target << 1) | 1, i2c->base + MPC_I2C_DR); + + if (i2c_wait(i2c, timeout, 1) < 0) + return -1; + + if (length) { + if (length == 1) + writeccr(i2c, CCR_MIEN | CCR_MEN | CCR_MSTA | CCR_TXAK); + else + writeccr(i2c, CCR_MIEN | CCR_MEN | CCR_MSTA); + /* Dummy read */ + readb(i2c->base + MPC_I2C_DR); + } + + for (i = 0; i < length; i++) { + if (i2c_wait(i2c, timeout, 0) < 0) + return -1; + + /* Generate txack on next to last byte */ + if (i == length - 2) + writeccr(i2c, CCR_MIEN | CCR_MEN | CCR_MSTA | CCR_TXAK); + /* Generate stop on last byte */ + if (i == length - 1) + writeccr(i2c, CCR_MIEN | CCR_MEN | CCR_TXAK); + data[i] = readb(i2c->base + MPC_I2C_DR); + } + + return length; +} + +static int mpc_xfer(struct i2c_adapter *adap, struct i2c_msg *msgs, int num) +{ + struct i2c_msg *pmsg; + int i; + int ret = 0; + unsigned long orig_jiffies = jiffies; + struct mpc_i2c *i2c = i2c_get_adapdata(adap); + + mpc_i2c_start(i2c); + + /* Allow bus up to 1s to become not busy */ + while (readb(i2c->base + MPC_I2C_SR) & CSR_MBB) { + if (signal_pending(current)) { + pr_debug("I2C: Interrupted\n"); + writeccr(i2c, 0); + return -EINTR; + } + if (time_after(jiffies, orig_jiffies + HZ)) { + pr_debug("I2C: timeout\n"); + if (readb(i2c->base + MPC_I2C_SR) == + (CSR_MCF | CSR_MBB | CSR_RXAK)) + mpc_i2c_fixup(i2c); + return -EIO; + } + schedule(); + } + + for (i = 0; ret >= 0 && i < num; i++) { + pmsg = &msgs[i]; + pr_debug("Doing %s %d bytes to 0x%02x - %d of %d messages\n", + pmsg->flags & I2C_M_RD ? "read" : "write", + pmsg->len, pmsg->addr, i + 1, num); + if (pmsg->flags & I2C_M_RD) + ret = + mpc_read(i2c, pmsg->addr, pmsg->buf, pmsg->len, i); + else + ret = + mpc_write(i2c, pmsg->addr, pmsg->buf, pmsg->len, i); + } + mpc_i2c_stop(i2c); + return (ret < 0) ? ret : num; +} + +static u32 mpc_functionality(struct i2c_adapter *adap) +{ + return I2C_FUNC_I2C | I2C_FUNC_SMBUS_EMUL; +} + +static const struct i2c_algorithm mpc_algo = { + .master_xfer = mpc_xfer, + .functionality = mpc_functionality, +}; + +static struct i2c_adapter mpc_ops = { + .owner = THIS_MODULE, + .name = "MPC adapter", + .id = I2C_HW_MPC107, + .algo = &mpc_algo, + .class = I2C_CLASS_HWMON, + .timeout = 1, + .retries = 1 +}; + +static int fsl_i2c_probe(struct platform_device *pdev) +{ + int result = 0; + struct mpc_i2c *i2c; + struct fsl_i2c_platform_data *pdata; + struct resource *r = platform_get_resource(pdev, IORESOURCE_MEM, 0); + + pdata = (struct fsl_i2c_platform_data *) pdev->dev.platform_data; + + if (!(i2c = kzalloc(sizeof(*i2c), GFP_KERNEL))) { + return -ENOMEM; + } + + i2c->irq = platform_get_irq(pdev, 0); + if (i2c->irq < 0) { + result = -ENXIO; + goto fail_get_irq; + } + i2c->flags = pdata->device_flags; + init_waitqueue_head(&i2c->queue); + + i2c->base = ioremap((phys_addr_t)r->start, MPC_I2C_REGION); + + if (!i2c->base) { + printk(KERN_ERR "i2c-mpc - failed to map controller\n"); + result = -ENOMEM; + goto fail_map; + } + + if (i2c->irq != 0) + if ((result = request_irq(i2c->irq, mpc_i2c_isr, + IRQF_SHARED, "i2c-mpc", i2c)) < 0) { + printk(KERN_ERR + "i2c-mpc - failed to attach interrupt\n"); + goto fail_irq; + } + + mpc_i2c_setclock(i2c); + platform_set_drvdata(pdev, i2c); + + i2c->adap = mpc_ops; + i2c->adap.nr = pdev->id; + i2c_set_adapdata(&i2c->adap, i2c); + i2c->adap.dev.parent = &pdev->dev; + if ((result = i2c_add_numbered_adapter(&i2c->adap)) < 0) { + printk(KERN_ERR "i2c-mpc - failed to add adapter\n"); + goto fail_add; + } + + return result; + + fail_add: + if (i2c->irq != 0) + free_irq(i2c->irq, i2c); + fail_irq: + iounmap(i2c->base); + fail_map: + fail_get_irq: + kfree(i2c); + return result; +}; + +static int fsl_i2c_remove(struct platform_device *pdev) +{ + struct mpc_i2c *i2c = platform_get_drvdata(pdev); + + i2c_del_adapter(&i2c->adap); + platform_set_drvdata(pdev, NULL); + + if (i2c->irq != 0) + free_irq(i2c->irq, i2c); + + iounmap(i2c->base); + kfree(i2c); + return 0; +}; + +/* Structure for a device driver */ +static struct platform_driver fsl_i2c_driver = { + .probe = fsl_i2c_probe, + .remove = fsl_i2c_remove, + .driver = { + .owner = THIS_MODULE, + .name = "fsl-i2c", + }, +}; + +static int __init fsl_i2c_init(void) +{ + return platform_driver_register(&fsl_i2c_driver); +} + +static void __exit fsl_i2c_exit(void) +{ + platform_driver_unregister(&fsl_i2c_driver); +} + +module_init(fsl_i2c_init); +module_exit(fsl_i2c_exit); + +MODULE_AUTHOR("Adrian Cox "); +MODULE_DESCRIPTION + ("I2C-Bus adapter for MPC107 bridge and MPC824x/85xx/52xx processors"); +MODULE_LICENSE("GPL"); -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/