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Old 11-18-2008, 07:42 PM
Ben Collins
 
Default UBUNTU: SAUCE: update toshiba_acpi module to development snapshot 19a

On Tue, 2008-11-18 at 16:27 +0000, Andy Whitcroft wrote:
> OriginalLocation: http://memebeam.org/free-software/toshiba_acpi/toshiba_acpi-dev_toshiba_test5-linux_2.6.21.patch
> Bug: #269831
>
> Update the toshiba_acpi module to the latest development snapshot from
> the URL above, plus local modifications required for our acpi tooling.
> This is a direct pull forward of the changes as applied to Hardy.
>
> Signed-off-by: Andy Whitcroft <apw@canonical.com>

ACK

> ---
> drivers/acpi/toshiba_acpi.c | 198 ++++++++++++++++++++++++++++++++++++++++++-
> 1 files changed, 197 insertions(+), 1 deletions(-)
>
> diff --git a/drivers/acpi/toshiba_acpi.c b/drivers/acpi/toshiba_acpi.c
> index 0a43c8e..f320918 100644
> --- a/drivers/acpi/toshiba_acpi.c
> +++ b/drivers/acpi/toshiba_acpi.c
> @@ -28,12 +28,26 @@
> * Yasushi Nagato - changes for linux kernel 2.4 -> 2.5
> * Rob Miller - TV out and hotkeys help
> *
> + * PLEASE NOTE
> + *
> + * This is an experimental version of toshiba_acpi which includes emulation
> + * of the original toshiba driver's /proc/toshiba and /dev/toshiba,
> + * allowing Toshiba userspace utilities to work. The relevant code was
> + * based on toshiba.c (copyright 1996-2001 Jonathan A. Buzzard) and
> + * incorporated into this driver with help from Gintautas Miliauskas,
> + * Charles Schwieters, and Christoph Burger-Scheidlin.
> + *
> + * Caveats:
> + * * hotkey status in /proc/toshiba is not implemented
> + * * to make accesses to /dev/toshiba load this driver instead of
> + * the original driver, you will have to modify your module
> + * auto-loading configuration
> *
> * TODO
> *
> */
>
> -#define TOSHIBA_ACPI_VERSION "0.18"
> +#define TOSHIBA_ACPI_VERSION "experimental-dev-toshiba-test-5"
> #define PROC_INTERFACE_VERSION 1
>
> #include <linux/kernel.h>
> @@ -41,6 +55,9 @@
> #include <linux/init.h>
> #include <linux/types.h>
> #include <linux/proc_fs.h>
> +#include <linux/miscdevice.h>
> +#include <linux/toshiba.h>
> +#include <asm/io.h>
> #include <linux/backlight.h>
>
> #include <asm/uaccess.h>
> @@ -497,6 +514,179 @@ static char *read_version(char *p)
> return p;
> }
>
> +/* /dev/toshiba and /proc/toshiba handlers {{{
> + *
> + * ISSUE: lots of magic numbers and mysterious code
> + */
> +
> +#define TOSH_MINOR_DEV 181
> +#define OLD_PROC_TOSHIBA "toshiba"
> +
> +static int
> +tosh_acpi_bridge(SMMRegisters* regs)
> +{
> + acpi_status status;
> +
> + /* assert(sizeof(SMMRegisters) == sizeof(u32)*HCI_WORDS); */
> + status = hci_raw((u32*)regs, (u32*)regs);
> + if (status == AE_OK && (regs->eax & 0xff00) == HCI_SUCCESS)
> + return 0;
> +
> + return -EINVAL;
> +}
> +
> +static int
> +tosh_ioctl(struct inode* ip, struct file* fp, unsigned int cmd,
> + unsigned long arg)
> +{
> + SMMRegisters regs;
> + unsigned short ax,bx;
> + int err;
> +
> + if ((!arg) || (cmd != TOSH_SMM))
> + return -EINVAL;
> +
> + if (copy_from_user(&regs, (SMMRegisters*)arg, sizeof(SMMRegisters)))
> + return -EFAULT;
> +
> + ax = regs.eax & 0xff00;
> + bx = regs.ebx & 0xffff;
> +
> + /* block HCI calls to read/write memory & PCI devices */
> + if (((ax==HCI_SET) || (ax==HCI_GET)) && (bx>0x0069))
> + return -EINVAL;
> +
> + err = tosh_acpi_bridge(&regs);
> +
> + if (copy_to_user((SMMRegisters*)arg, &regs, sizeof(SMMRegisters)))
> + return -EFAULT;
> +
> + return err;
> +}
> +
> +static int
> +tosh_get_machine_id(void __iomem *bios)
> +{
> + int id;
> + unsigned short bx,cx;
> + unsigned long address;
> +
> + id = (0x100*(int) readb(bios+0xfffe))+((int) readb(bios+0xfffa));
> +
> + /* do we have a SCTTable machine identication number on our hands */
> + if (id==0xfc2f) {
> + bx = 0xe6f5; /* cheat */
> + /* now twiddle with our pointer a bit */
> + address = 0x00000000 + bx;
> + cx = readw(bios + address);
> + address = 0x00000009 + bx + cx;
> + cx = readw(bios + address);
> + address = 0x0000000a + cx;
> + cx = readw(bios + address);
> + /* now construct our machine identification number */
> + id = ((cx & 0xff)<<8)+((cx & 0xff00)>>8);
> + }
> +
> + return id;
> +}
> +
> +static int tosh_id;
> +static int tosh_bios;
> +static int tosh_date;
> +static int tosh_sci;
> +
> +static struct file_operations tosh_fops = {
> + .owner = THIS_MODULE,
> + .ioctl = tosh_ioctl
> +};
> +
> +static struct miscdevice tosh_device = {
> + TOSH_MINOR_DEV,
> + "toshiba",
> + &tosh_fops
> +};
> +
> +static void
> +setup_tosh_info(void __iomem *bios)
> +{
> + int major, minor;
> + int day, month, year;
> +
> + tosh_id = tosh_get_machine_id(bios);
> +
> + /* get the BIOS version */
> + major = readb(bios + 0xe009)-'0';
> + minor = ((readb(bios + 0xe00b)-'0')*10)+(readb(bios + 0xe00c)-'0');
> + tosh_bios = (major*0x100)+minor;
> +
> + /* get the BIOS date */
> + day = ((readb(bios + 0xfff5)-'0')*10)+(readb(bios + 0xfff6)-'0');
> + month = ((readb(bios + 0xfff8)-'0')*10)+(readb(bios + 0xfff9)-'0');
> + year = ((readb(bios + 0xfffb)-'0')*10)+(readb(bios + 0xfffc)-'0');
> + tosh_date = (((year-90) & 0x1f)<<10) | ((month & 0xf)<<6)
> + | ((day & 0x1f)<<1);
> +}
> +
> +/* /proc/toshiba read handler */
> +static int
> +tosh_get_info(char* buffer, char** start, off_t fpos, int length)
> +{
> + char* temp = buffer;
> + /* TODO: tosh_fn_status() */
> + int key = 0;
> +
> + /* Format:
> + * 0) Linux driver version (this will change if format changes)
> + * 1) Machine ID
> + * 2) SCI version
> + * 3) BIOS version (major, minor)
> + * 4) BIOS date (in SCI date format)
> + * 5) Fn Key status
> + */
> +
> + temp += sprintf(temp, "1.1 0x%04x %d.%d %d.%d 0x%04x 0x%02x
",
> + tosh_id,
> + (tosh_sci & 0xff00)>>8,
> + tosh_sci & 0xff,
> + (tosh_bios & 0xff00)>>8,
> + tosh_bios & 0xff,
> + tosh_date,
> + key);
> +
> + return temp-buffer;
> +}
> +
> +static int __init
> +old_driver_emulation_init(void)
> +{
> + int status;
> + void __iomem *bios = ioremap(0xf0000, 0x10000);
> + if (!bios)
> + return -ENOMEM;
> +
> + if ((status = misc_register(&tosh_device))) {
> + printk(MY_ERR "failed to register misc device %d ("%s")
",
> + tosh_device.minor, tosh_device.name);
> + return status;
> + }
> +
> + setup_tosh_info(bios);
> + create_proc_info_entry(OLD_PROC_TOSHIBA, 0, NULL, tosh_get_info);
> +
> + iounmap(bios);
> +
> + return 0;
> +}
> +
> +static void __exit
> +old_driver_emulation_exit(void)
> +{
> + remove_proc_entry(OLD_PROC_TOSHIBA, NULL);
> + misc_deregister(&tosh_device);
> +}
> +
> +/* }}} end of /dev/toshiba and /proc/toshiba handlers */
> +
> /* proc and module init
> */
>
> @@ -555,6 +745,8 @@ static void toshiba_acpi_exit(void)
> if (toshiba_proc_dir)
> remove_proc_entry(PROC_TOSHIBA, acpi_root_dir);
>
> + old_driver_emulation_exit();
> +
> return;
> }
>
> @@ -562,6 +754,7 @@ static int __init toshiba_acpi_init(void)
> {
> acpi_status status = AE_OK;
> u32 hci_result;
> + int status2;
>
> if (acpi_disabled)
> return -ENODEV;
> @@ -578,6 +771,9 @@ static int __init toshiba_acpi_init(void)
> TOSHIBA_ACPI_VERSION);
> printk(MY_INFO " HCI method: %s
", method_hci);
>
> + if ((status2 = old_driver_emulation_init()))
> + return status2;
> +
> force_fan = 0;
> key_event_valid = 0;
>
> --
> 1.6.0.4.911.gc990
>
>


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