ACPI: Allow a WAN module enable/disable on a Thinkpad X60. (42adb53c) · Commits · 戴 / test

drivers/acpi/ibm_acpi.c

+70 −0

Original line number	Diff line number	Diff line
		@@ -567,6 +567,69 @@ static int bluetooth_write(char *buf)
		return 0;
		}

		static int wan_supported;

		static int wan_init(void)
		{
		wan_supported = hkey_handle &&
		acpi_evalf(hkey_handle, NULL, "GWAN", "qv");

		return 0;
		}

		static int wan_status(void)
		{
		int status;

		if (!wan_supported \|\|
		!acpi_evalf(hkey_handle, &status, "GWAN", "d"))
		status = 0;

		return status;
		}

		static int wan_read(char *p)
		{
		int len = 0;
		int status = wan_status();

		if (!wan_supported)
		len += sprintf(p + len, "status:\t\tnot supported\n");
		else if (!(status & 1))
		len += sprintf(p + len, "status:\t\tnot installed\n");
		else {
		len += sprintf(p + len, "status:\t\t%s\n", enabled(status, 1));
		len += sprintf(p + len, "commands:\tenable, disable\n");
		}

		return len;
		}

		static int wan_write(char *buf)
		{
		int status = wan_status();
		char *cmd;
		int do_cmd = 0;

		if (!wan_supported)
		return -ENODEV;

		while ((cmd = next_cmd(&buf))) {
		if (strlencmp(cmd, "enable") == 0) {
		status \|= 2;
		} else if (strlencmp(cmd, "disable") == 0) {
		status &= ~2;
		} else
		return -EINVAL;
		do_cmd = 1;
		}

		if (do_cmd && !acpi_evalf(hkey_handle, NULL, "SWAN", "vd", status))
		return -EIO;

		return 0;
		}

		static int video_supported;
		static int video_orig_autosw;

		@@ -1562,6 +1625,13 @@ static struct ibm_struct ibms[] = {
		.read = bluetooth_read,
		.write = bluetooth_write,
		},
		{
		.name = "wan",
		.init = wan_init,
		.read = wan_read,
		.write = wan_write,
		.experimental = 1,
		},
		{
		.name = "video",
		.init = video_init,