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SubjectRe: [PATCH] PnP update - drivers
Date

Agreed, Some of those improvements will help us fix old ISA devices that are
misbehaving.

On Monday 13 January 2003 12:39 pm, Adam Belay wrote:
> On Sun, Jan 12, 2003 at 08:30:57PM +0100, Jaroslav Kysela wrote:
> > Hi,
> >
> > this patch must be applied after PnP patch v0.94. It contains my
> > small cleanups of PnP code and I tried to rewrite almost all ISA PnP
> > drivers to new PnP subsystem except sound drivers (ALSA & OSS). Please,
> > apply to get away compilation problems.
> >
> > Jaroslav
>
> Hi Jaroslav,
>
> Next time send pnp related changes to me directly. I would have been happy
> to include your work after I carefully reviewed it. I was planning to
> merge a very large resource algorithm improvement soon, but now because of
> these changes, that I do not even necessarily agree with, I will be unable
> to include this major improvement and bug fix for a while. Furthermore
> many people of whom are counting on me to merge thier patches will now be
> dissappointed to hear that their changes, many of which are critical for
> certain pnp hardware configurations will be delayed.
>
> Although I am glad to see the drivers converted, this has been done in a
> way that is not desirable. They use compat.c which was intended as a
> temporary solution. In fact I may even remove compat.c all together. This
> has been clearly stated in both the file compat.c and pnp.txt
> documentation. Attached is a copy of Zwane's ide conversion patch against
> 2.5.56. It can be used as an example of a correct driver conversion.
> Notice how it is fully integrated into the driver model as all drivers
> should be.
>
> I'm now unhappy with the current pnp code and will most likely revert all
> pnp changes between 2.5.56 and 2.5.57 to avoid a merging nightmare. I will
> then carefully remerge what I feel is acceptable.
>
> Once again, I'm sorry to those who will be unable to use thier systems due
> to this major set back. All pnp changes should be sent to me and me only.
> I believe these pnp change conflicts can easily be worked out with better
> communication. I intend to make a better effort in the future to explain
> my goals and I hope that you will do the same. I appreciate your work with
> the pnp layer.
>
> Sincerely,
>
> Adam Belay
> Linux Plug and Play Maintainer
>
>
>
>
>
> ===================================================================
> PnP IDE Conversion from Zwane Mwaikambo
>
>
>
> Index: linux-2.5.56/drivers/ide/ide-pnp.c
> ===================================================================
> RCS file: /build/cvsroot/linux-2.5.56/drivers/ide/ide-pnp.c,v
> retrieving revision 1.1.1.1
> diff -u -r1.1.1.1 ide-pnp.c
> --- linux-2.5.56/drivers/ide/ide-pnp.c 16 Dec 2002 05:16:23 -0000 1.1.1.1
> +++ linux-2.5.56/drivers/ide/ide-pnp.c 16 Dec 2002 08:30:39 -0000
> @@ -18,13 +18,11 @@
>
> #include <linux/ide.h>
> #include <linux/init.h>
> -
> -#include <linux/isapnp.h>
> +#include <linux/pnp.h>
>
> #define DEV_IO(dev, index) (dev->resource[index].start)
> #define DEV_IRQ(dev, index) (dev->irq_resource[index].start)
> -
> -#define DEV_NAME(dev) (dev->bus->name ? dev->bus->name : "ISA PnP")
> +#define DEV_NAME(dev) (dev->protocol->name ? dev->protocol->name : "ISA
> PnP")
>
> #define GENERIC_HD_DATA 0
> #define GENERIC_HD_ERROR 1
> @@ -35,125 +33,125 @@
> #define GENERIC_HD_SELECT 6
> #define GENERIC_HD_STATUS 7
>
> -static int generic_ide_offsets[IDE_NR_PORTS] __initdata = {
> +static int generic_ide_offsets[IDE_NR_PORTS] = {
> GENERIC_HD_DATA, GENERIC_HD_ERROR, GENERIC_HD_NSECTOR,
> GENERIC_HD_SECTOR, GENERIC_HD_LCYL, GENERIC_HD_HCYL,
> GENERIC_HD_SELECT, GENERIC_HD_STATUS, -1, -1
> };
>
> /* ISA PnP device table entry */
> -struct pnp_dev_t {
> - unsigned short card_vendor, card_device, vendor, device;
> - int (*init_fn)(struct pci_dev *dev, int enable);
> +struct idepnp_private {
> + struct pnp_dev *dev;
> + struct pci_dev pci_dev; /* we need this for the upper layers */
> + int (*init_fn)(struct idepnp_private *device, int enable);
> };
>
> -/* Generic initialisation function for ISA PnP IDE interface */
> +/* Barf bags at the ready! Enough to satisfy IDE core */
> +static void pnp_to_pci(struct pnp_dev *pnp_dev, struct pci_dev *pci_dev)
> +{
> + pci_dev->dev = pnp_dev->dev;
> + pci_set_drvdata(pci_dev, pnp_get_drvdata(pnp_dev));
> + pci_dev->irq = DEV_IRQ(pnp_dev, 0);
> + pci_set_dma_mask(pci_dev, 0x00ffffff);
> +}
>
> -static int __init pnpide_generic_init(struct pci_dev *dev, int enable)
> +/* Generic initialisation function for ISA PnP IDE interface */
> +static int pnpide_generic_init(struct idepnp_private *device, int enable)
> {
> hw_regs_t hw;
> ide_hwif_t *hwif;
> int index;
> + struct pnp_dev *dev = device->dev;
>
> - if (!enable)
> + if (!enable) {
> + /* nothing to do for now */
> return 0;
> + }
>
> if (!(DEV_IO(dev, 0) && DEV_IO(dev, 1) && DEV_IRQ(dev, 0)))
> - return 1;
> + return -EINVAL;
>
> ide_setup_ports(&hw, (ide_ioreg_t) DEV_IO(dev, 0),
> generic_ide_offsets,
> (ide_ioreg_t) DEV_IO(dev, 1),
> 0, NULL,
> -// generic_pnp_ide_iops,
> + /* generic_pnp_ide_iops, */
> DEV_IRQ(dev, 0));
>
> index = ide_register_hw(&hw, &hwif);
>
> if (index != -1) {
> printk(KERN_INFO "ide%d: %s IDE interface\n", index, DEV_NAME(dev));
> - hwif->pci_dev = dev;
> + hwif->pci_dev = &device->pci_dev;
> return 0;
> }
>
> - return 1;
> + return -ENODEV;
> }
>
> /* Add your devices here :)) */
> -struct pnp_dev_t idepnp_devices[] __initdata = {
> - /* Generic ESDI/IDE/ATA compatible hard disk controller */
> - { ISAPNP_ANY_ID, ISAPNP_ANY_ID,
> - ISAPNP_VENDOR('P', 'N', 'P'), ISAPNP_DEVICE(0x0600),
> - pnpide_generic_init },
> - { 0 }
> +#define IDEPNP_GENERIC_INIT 0
> +static const struct pnp_device_id pnp_ide_devs[] = {
> + /* Generic ESDI/IDE/ATA compatible hard disk controller */
> + {"PNP0600", IDEPNP_GENERIC_INIT},
> + {"", 0}
> };
>
> #define NR_PNP_DEVICES 8
> -struct pnp_dev_inst {
> - struct pci_dev *dev;
> - struct pnp_dev_t *dev_type;
> -};
> -static struct pnp_dev_inst devices[NR_PNP_DEVICES];
> -static int pnp_ide_dev_idx = 0;
> +/* Nb. pnpide_generic_init is indexed as IDEPNP_GENERIC_INIT */
> +static int (*init_functions[])(struct idepnp_private *device, int enable)
> = {pnpide_generic_init}; +static struct idepnp_private
> devices[NR_PNP_DEVICES];
> +static int pnp_ide_dev_idx;
>
> /*
> * Probe for ISA PnP IDE interfaces.
> */
> -
> -void __init pnpide_init(int enable)
> +static int pnp_ide_probe(struct pnp_dev *pdev, const struct pnp_device_id
> *dev_id) {
> - struct pci_dev *dev = NULL;
> - struct pnp_dev_t *dev_type;
> + int ret;
> + struct idepnp_private *p;
>
> - if (!isapnp_present())
> - return;
> + /*
> + * Register device in the array to
> + * deactivate it on a module unload.
> + */
> + if (pnp_ide_dev_idx >= NR_PNP_DEVICES)
> + return -ENOSPC;
> +
> + p = &devices[pnp_ide_dev_idx];
> + p->init_fn = init_functions[dev_id->driver_data];
> + p->dev = pdev;
> + pnp_set_drvdata(pdev, p);
> + pnp_to_pci(p->dev, &p->pci_dev);
> + ret = p->init_fn(p, 1);
> + if (!ret)
> + pnp_ide_dev_idx++;
> +
> + return ret;
> +}
>
> - /* Module unload, deactivate all registered devices. */
> - if (!enable) {
> - int i;
> - for (i = 0; i < pnp_ide_dev_idx; i++) {
> - dev = devices[i].dev;
> - devices[i].dev_type->init_fn(dev, 0);
> - if (dev->deactivate)
> - dev->deactivate(dev);
> - }
> - return;
> - }
> +static void pnp_ide_remove(struct pnp_dev *dev)
> +{
> + struct idepnp_private *p = pnp_get_drvdata(dev);
> +
> + /* if p is null you have a bug elsewhere */
> + p->init_fn(p, 0);
> + pnp_ide_dev_idx--;
> + return;
> +}
>
> - for (dev_type = idepnp_devices; dev_type->vendor; dev_type++) {
> - while ((dev = isapnp_find_dev(NULL, dev_type->vendor,
> - dev_type->device, dev))) {
> -
> - if (dev->active)
> - continue;
> -
> - if (dev->prepare && dev->prepare(dev) < 0) {
> - printk(KERN_ERR"ide-pnp: %s prepare failed\n", DEV_NAME(dev));
> - continue;
> - }
> -
> - if (dev->activate && dev->activate(dev) < 0) {
> - printk(KERN_ERR"ide: %s activate failed\n", DEV_NAME(dev));
> - continue;
> - }
> -
> - /* Call device initialization function */
> - if (dev_type->init_fn(dev, 1)) {
> - if (dev->deactivate(dev))
> - dev->deactivate(dev);
> - } else {
> -#ifdef MODULE
> - /*
> - * Register device in the array to
> - * deactivate it on a module unload.
> - */
> - if (pnp_ide_dev_idx >= NR_PNP_DEVICES)
> - return;
> - devices[pnp_ide_dev_idx].dev = dev;
> - devices[pnp_ide_dev_idx].dev_type = dev_type;
> - pnp_ide_dev_idx++;
> -#endif
> - }
> - }
> - }
> +static struct pnp_driver idepnp_driver = {
> + .name = "ide-pnp",
> + .id_table = pnp_ide_devs,
> + .probe = pnp_ide_probe,
> + .remove = pnp_ide_remove
> +};
> +
> +void pnpide_init(int enable)
> +{
> + if (enable)
> + pnp_register_driver(&idepnp_driver);
> + else
> + pnp_unregister_driver(&idepnp_driver);
> }
> +
> Index: linux-2.5.56/drivers/ide/ide.c
> ===================================================================
> RCS file: /build/cvsroot/linux-2.5.56/drivers/ide/ide.c,v
> retrieving revision 1.1.1.1
> diff -u -r1.1.1.1 ide.c
> --- linux-2.5.56/drivers/ide/ide.c 16 Dec 2002 05:16:22 -0000 1.1.1.1
> +++ linux-2.5.56/drivers/ide/ide.c 16 Dec 2002 08:52:17 -0000
> @@ -2080,7 +2080,7 @@
> buddha_init();
> }
> #endif /* CONFIG_BLK_DEV_BUDDHA */
> -#if defined(CONFIG_BLK_DEV_ISAPNP) && defined(CONFIG_ISAPNP)
> +#if defined(CONFIG_BLK_DEV_ISAPNP) && defined(CONFIG_PNP)
> {
> extern void pnpide_init(int enable);
> pnpide_init(1);
> @@ -2256,7 +2256,7 @@
> spin_unlock_irqrestore(&ide_lock, flags);
> return 1;
> }
> -#if defined(CONFIG_BLK_DEV_ISAPNP) && defined(CONFIG_ISAPNP) &&
> defined(MODULE) +#if defined(CONFIG_BLK_DEV_ISAPNP) && defined(CONFIG_PNP)
> && defined(MODULE) pnpide_init(0);
> #endif /* CONFIG_BLK_DEV_ISAPNP */
> #ifdef CONFIG_PROC_FS

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