diff options
Diffstat (limited to 'drivers/gpu/drm/nouveau/nv10_gpio.c')
| -rw-r--r-- | drivers/gpu/drm/nouveau/nv10_gpio.c | 123 |
1 files changed, 123 insertions, 0 deletions
diff --git a/drivers/gpu/drm/nouveau/nv10_gpio.c b/drivers/gpu/drm/nouveau/nv10_gpio.c new file mode 100644 index 00000000..9d791800 --- /dev/null +++ b/drivers/gpu/drm/nouveau/nv10_gpio.c @@ -0,0 +1,123 @@ +/* + * Copyright (C) 2009 Francisco Jerez. + * All Rights Reserved. + * + * Permission is hereby granted, free of charge, to any person obtaining + * a copy of this software and associated documentation files (the + * "Software"), to deal in the Software without restriction, including + * without limitation the rights to use, copy, modify, merge, publish, + * distribute, sublicense, and/or sell copies of the Software, and to + * permit persons to whom the Software is furnished to do so, subject to + * the following conditions: + * + * The above copyright notice and this permission notice (including the + * next paragraph) shall be included in all copies or substantial + * portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, + * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF + * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. + * IN NO EVENT SHALL THE COPYRIGHT OWNER(S) AND/OR ITS SUPPLIERS BE + * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION + * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION + * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. + * + */ + +#include "drmP.h" +#include "nouveau_drv.h" +#include "nouveau_hw.h" +#include "nouveau_gpio.h" + +int +nv10_gpio_sense(struct drm_device *dev, int line) +{ + if (line < 2) { + line = line * 16; + line = NVReadCRTC(dev, 0, NV_PCRTC_GPIO) >> line; + return !!(line & 0x0100); + } else + if (line < 10) { + line = (line - 2) * 4; + line = NVReadCRTC(dev, 0, NV_PCRTC_GPIO_EXT) >> line; + return !!(line & 0x04); + } else + if (line < 14) { + line = (line - 10) * 4; + line = NVReadCRTC(dev, 0, NV_PCRTC_850) >> line; + return !!(line & 0x04); + } + + return -EINVAL; +} + +int +nv10_gpio_drive(struct drm_device *dev, int line, int dir, int out) +{ + u32 reg, mask, data; + + if (line < 2) { + line = line * 16; + reg = NV_PCRTC_GPIO; + mask = 0x00000011; + data = (dir << 4) | out; + } else + if (line < 10) { + line = (line - 2) * 4; + reg = NV_PCRTC_GPIO_EXT; + mask = 0x00000003; + data = (dir << 1) | out; + } else + if (line < 14) { + line = (line - 10) * 4; + reg = NV_PCRTC_850; + mask = 0x00000003; + data = (dir << 1) | out; + } else { + return -EINVAL; + } + + mask = NVReadCRTC(dev, 0, reg) & ~(mask << line); + NVWriteCRTC(dev, 0, reg, mask | (data << line)); + return 0; +} + +void +nv10_gpio_irq_enable(struct drm_device *dev, int line, bool on) +{ + u32 mask = 0x00010001 << line; + + nv_wr32(dev, 0x001104, mask); + nv_mask(dev, 0x001144, mask, on ? mask : 0); +} + +static void +nv10_gpio_isr(struct drm_device *dev) +{ + u32 intr = nv_rd32(dev, 0x1104); + u32 hi = (intr & 0x0000ffff) >> 0; + u32 lo = (intr & 0xffff0000) >> 16; + + nouveau_gpio_isr(dev, 0, hi | lo); + + nv_wr32(dev, 0x001104, intr); +} + +int +nv10_gpio_init(struct drm_device *dev) +{ + nv_wr32(dev, 0x001140, 0x00000000); + nv_wr32(dev, 0x001100, 0xffffffff); + nv_wr32(dev, 0x001144, 0x00000000); + nv_wr32(dev, 0x001104, 0xffffffff); + nouveau_irq_register(dev, 28, nv10_gpio_isr); /* PBUS */ + return 0; +} + +void +nv10_gpio_fini(struct drm_device *dev) +{ + nv_wr32(dev, 0x001140, 0x00000000); + nv_wr32(dev, 0x001144, 0x00000000); + nouveau_irq_unregister(dev, 28); +} |