SCI stands for System Configuration Interface, which aim is to conceal differences in hardware between different models. This patch introduces four new calls: sci_open, sci_close, sci_read and sci_write, along with its definitions and return codes which will be used by later patches. More information about the SCI can be found at Jonathan Buzzard's website [1]. [1] http://www.buzzard.me.uk/toshiba/docs.html Signed-off-by: Azael Avalos <coproscefalo@xxxxxxxxx> --- drivers/platform/x86/toshiba_acpi.c | 79 +++++++++++++++++++++++++++++++++++++ 1 file changed, 79 insertions(+) diff --git a/drivers/platform/x86/toshiba_acpi.c b/drivers/platform/x86/toshiba_acpi.c index 90dd764..c468003 100644 --- a/drivers/platform/x86/toshiba_acpi.c +++ b/drivers/platform/x86/toshiba_acpi.c @@ -77,6 +77,9 @@ MODULE_LICENSE("GPL"); * However the ACPI methods seem to be incomplete in some areas (for * example they allow setting, but not reading, the LCD brightness value), * so this is still useful. + * + * SCI stands for "System Configuration Interface" which aim is to + * conceal differences in hardware between different models. */ #define HCI_WORDS 6 @@ -84,12 +87,20 @@ MODULE_LICENSE("GPL"); /* operations */ #define HCI_SET 0xff00 #define HCI_GET 0xfe00 +#define SCI_OPEN 0xf100 +#define SCI_CLOSE 0xf200 +#define SCI_GET 0xf300 +#define SCI_SET 0xf400 /* return codes */ #define HCI_SUCCESS 0x0000 #define HCI_FAILURE 0x1000 #define HCI_NOT_SUPPORTED 0x8000 #define HCI_EMPTY 0x8c00 +#define SCI_OPEN_CLOSE_OK 0x0044 +#define SCI_ALREADY_OPEN 0x8100 +#define SCI_NOT_OPENED 0x8200 +#define SCI_NOT_PRESENT 0x8600 /* registers */ #define HCI_FAN 0x0004 @@ -280,6 +291,74 @@ static acpi_status hci_read2(struct toshiba_acpi_dev *dev, u32 reg, return status; } +/* common sci tasks + */ + +static int sci_open(struct toshiba_acpi_dev *dev) +{ + u32 in[HCI_WORDS] = { SCI_OPEN, 0, 0, 0, 0, 0 }; + u32 out[HCI_WORDS]; + acpi_status status; + + status = hci_raw(dev, in, out); + if (ACPI_FAILURE(status) || out[0] == HCI_FAILURE) { + pr_err("ACPI call to open SCI failed\n"); + return 0; + } + + if (out[0] == SCI_OPEN_CLOSE_OK) { + return 1; + } else if (out[0] == SCI_ALREADY_OPEN) { + pr_info("Toshiba SCI already opened\n"); + return 1; + } else if (out[0] == SCI_NOT_PRESENT) { + pr_info("Toshiba SCI is not present\n"); + } + + return 0; +} + +static void sci_close(struct toshiba_acpi_dev *dev) +{ + u32 in[HCI_WORDS] = { SCI_CLOSE, 0, 0, 0, 0, 0 }; + u32 out[HCI_WORDS]; + acpi_status status; + + status = hci_raw(dev, in, out); + if (ACPI_FAILURE(status) || out[0] == HCI_FAILURE) { + pr_err("ACPI call to close SCI failed\n"); + return; + } + + if (out[0] == SCI_OPEN_CLOSE_OK) + return; + else if (out[0] == SCI_NOT_OPENED) + pr_info("Toshiba SCI not opened\n"); + else if (out[0] == SCI_NOT_PRESENT) + pr_info("Toshiba SCI is not present\n"); +} + +static acpi_status sci_read(struct toshiba_acpi_dev *dev, u32 reg, + u32 *out1, u32 *result) +{ + u32 in[HCI_WORDS] = { SCI_GET, reg, 0, 0, 0, 0 }; + u32 out[HCI_WORDS]; + acpi_status status = hci_raw(dev, in, out); + *out1 = out[2]; + *result = (ACPI_SUCCESS(status)) ? out[0] : HCI_FAILURE; + return status; +} + +static acpi_status sci_write(struct toshiba_acpi_dev *dev, u32 reg, + u32 in1, u32 *result) +{ + u32 in[HCI_WORDS] = { SCI_SET, reg, in1, 0, 0, 0 }; + u32 out[HCI_WORDS]; + acpi_status status = hci_raw(dev, in, out); + *result = (ACPI_SUCCESS(status)) ? out[0] : HCI_FAILURE; + return status; +} + /* Illumination support */ static int toshiba_illumination_available(struct toshiba_acpi_dev *dev) { -- 1.9.1 -- To unsubscribe from this list: send the line "unsubscribe platform-driver-x86" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
