8d021d71b3
We received a donation of a Titan which has this useless feature allowing users to control the brightness of the LED behind the logo of NVIDIA. In the true spirit of open source, let's expose that to the users of very expensive cards! This patch hooks up this LED/PWM to the LED subsystem which allows blinking it in sync with cpu/disk/network/whatever activity (heartbeat is quite nice!). Users may also implement some breathing effect or morse code support in the userspace if they feel like it. v2: - surround the use of the LED framework with ifdef CONFIG_LEDS_CLASS v3: - avoid using ifdefs everywhere, follow the recommendations of /doc/Documentation/CodingStyle. Suggested by Emil Velikov. v4 (Ben): - squashed series of fixes from ml Signed-off-by: Martin Peres <martin.peres@free.fr> Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
49 lines
1.3 KiB
C
49 lines
1.3 KiB
C
#ifndef __NVBIOS_GPIO_H__
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#define __NVBIOS_GPIO_H__
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enum dcb_gpio_func_name {
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DCB_GPIO_PANEL_POWER = 0x01,
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DCB_GPIO_TVDAC0 = 0x0c,
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DCB_GPIO_TVDAC1 = 0x2d,
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DCB_GPIO_FAN = 0x09,
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DCB_GPIO_FAN_SENSE = 0x3d,
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DCB_GPIO_LOGO_LED_PWM = 0x84,
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DCB_GPIO_UNUSED = 0xff,
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DCB_GPIO_VID0 = 0x04,
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DCB_GPIO_VID1 = 0x05,
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DCB_GPIO_VID2 = 0x06,
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DCB_GPIO_VID3 = 0x1a,
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DCB_GPIO_VID4 = 0x73,
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DCB_GPIO_VID5 = 0x74,
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DCB_GPIO_VID6 = 0x75,
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DCB_GPIO_VID7 = 0x76,
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DCB_GPIO_VID_PWM = 0x81,
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};
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#define DCB_GPIO_LOG_DIR 0x02
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#define DCB_GPIO_LOG_DIR_OUT 0x00
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#define DCB_GPIO_LOG_DIR_IN 0x02
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#define DCB_GPIO_LOG_VAL 0x01
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#define DCB_GPIO_LOG_VAL_LO 0x00
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#define DCB_GPIO_LOG_VAL_HI 0x01
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struct dcb_gpio_func {
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u8 func;
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u8 line;
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u8 log[2];
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/* so far, "param" seems to only have an influence on PWM-related
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* GPIOs such as FAN_CONTROL and PANEL_BACKLIGHT_LEVEL.
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* if param equals 1, hardware PWM is available
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* if param equals 0, the host should toggle the GPIO itself
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*/
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u8 param;
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};
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u16 dcb_gpio_table(struct nvkm_bios *, u8 *ver, u8 *hdr, u8 *cnt, u8 *len);
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u16 dcb_gpio_entry(struct nvkm_bios *, int idx, int ent, u8 *ver, u8 *len);
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u16 dcb_gpio_parse(struct nvkm_bios *, int idx, int ent, u8 *ver, u8 *len,
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struct dcb_gpio_func *);
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u16 dcb_gpio_match(struct nvkm_bios *, int idx, u8 func, u8 line,
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u8 *ver, u8 *len, struct dcb_gpio_func *);
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#endif
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