drm/nouveau/gpio: port gpio to subdev interfaces

v2: Ben Skeggs <bskeggs@redhat.com>
- rebase on top of v3.6-rc6 with gpio reset patch integrated already

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>

drivers/gpu/drm/nouveau/Makefile

@@ -20,6 +20,8 @@ nouveau-y += core/core/subdev.o
 
 nouveau-y += core/subdev/bios/base.o
 nouveau-y += core/subdev/bios/bit.o
+nouveau-y += core/subdev/bios/dcb.o
+nouveau-y += core/subdev/bios/gpio.o
 nouveau-y += core/subdev/device/base.o
 nouveau-y += core/subdev/device/nv04.o
 nouveau-y += core/subdev/device/nv10.o
@@ -41,6 +43,7 @@ nouveau-y += core/subdev/fb/nvc0_vram.o
 nouveau-y += core/subdev/gpio/base.o
 nouveau-y += core/subdev/gpio/nv10.o
 nouveau-y += core/subdev/gpio/nv50.o
+nouveau-y += core/subdev/gpio/nvd0.o
 nouveau-y += core/subdev/i2c/base.o
 nouveau-y += core/subdev/instmem/nv04.o
 nouveau-y += core/subdev/instmem/nv50.o

drivers/gpu/drm/nouveau/core/include/subdev/bios/dcb.h

@@ -0,0 +1,19 @@
+#ifndef __NVBIOS_DCB_H__
+#define __NVBIOS_DCB_H__
+
+enum dcb_output_type {
+	DCB_OUTPUT_ANALOG	= 0x0,
+	DCB_OUTPUT_TV		= 0x1,
+	DCB_OUTPUT_TMDS		= 0x2,
+	DCB_OUTPUT_LVDS		= 0x3,
+	DCB_OUTPUT_DP		= 0x4,
+	DCB_OUTPUT_EOL		= 0xe,
+	DCB_OUTPUT_UNUSED	= 0xf,
+};
+
+u16 dcb_table(struct nouveau_bios *, u8 *ver, u8 *hdr, u8 *ent, u8 *len);
+u16 dcb_outp(struct nouveau_bios *, u8 idx, u8 *ver, u8 *len);
+int dcb_outp_foreach(struct nouveau_bios *, void *data, int (*exec)
+		     (struct nouveau_bios *, void *, int index, u16 entry));
+
+#endif

drivers/gpu/drm/nouveau/core/include/subdev/bios/gpio.h

@@ -0,0 +1,26 @@
+#ifndef __NVBIOS_GPIO_H__
+#define __NVBIOS_GPIO_H__
+
+struct nouveau_bios;
+
+enum dcb_gpio_func_name {
+	DCB_GPIO_PANEL_POWER = 0x01,
+	DCB_GPIO_TVDAC0 = 0x0c,
+	DCB_GPIO_TVDAC1 = 0x2d,
+	DCB_GPIO_PWM_FAN = 0x09,
+	DCB_GPIO_FAN_SENSE = 0x3d,
+	DCB_GPIO_UNUSED = 0xff
+};
+
+struct dcb_gpio_func {
+	u8 func;
+	u8 line;
+	u8 log[2];
+};
+
+u16 dcb_gpio_table(struct nouveau_bios *);
+u16 dcb_gpio_entry(struct nouveau_bios *, int idx, int ent, u8 *ver);
+int dcb_gpio_parse(struct nouveau_bios *, int idx, u8 func, u8 line,
+		   struct dcb_gpio_func *);
+
+#endif

drivers/gpu/drm/nouveau/core/include/subdev/gpio.h

@@ -1,71 +1,64 @@
-/*
- * Copyright 2011 Red Hat Inc.
- *
- * 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 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 HOLDER(S) OR AUTHOR(S) 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.
- */
-
 #ifndef __NOUVEAU_GPIO_H__
 #define __NOUVEAU_GPIO_H__
 
-struct gpio_func {
-	u8 func;
-	u8 line;
-	u8 log[2];
-};
+#include <core/subdev.h>
+#include <core/device.h>
 
-/* nouveau_gpio.c */
-int  nouveau_gpio_create(struct drm_device *);
-void nouveau_gpio_destroy(struct drm_device *);
-int  nouveau_gpio_init(struct drm_device *);
-void nouveau_gpio_fini(struct drm_device *);
-void nouveau_gpio_reset(struct drm_device *);
-int  nouveau_gpio_drive(struct drm_device *, int idx, int line,
-			int dir, int out);
-int  nouveau_gpio_sense(struct drm_device *, int idx, int line);
-int  nouveau_gpio_find(struct drm_device *, int idx, u8 tag, u8 line,
-		       struct gpio_func *);
-int  nouveau_gpio_set(struct drm_device *, int idx, u8 tag, u8 line, int state);
-int  nouveau_gpio_get(struct drm_device *, int idx, u8 tag, u8 line);
-int  nouveau_gpio_irq(struct drm_device *, int idx, u8 tag, u8 line, bool on);
-void nouveau_gpio_isr(struct drm_device *, int idx, u32 mask);
-int  nouveau_gpio_isr_add(struct drm_device *, int idx, u8 tag, u8 line,
-			  void (*)(void *, int state), void *data);
-void nouveau_gpio_isr_del(struct drm_device *, int idx, u8 tag, u8 line,
-			  void (*)(void *, int state), void *data);
+#include <subdev/bios.h>
+#include <subdev/bios/gpio.h>
 
-static inline bool
-nouveau_gpio_func_valid(struct drm_device *dev, u8 tag)
-{
-	struct gpio_func func;
-	return (nouveau_gpio_find(dev, 0, tag, 0xff, &func)) == 0;
-}
+struct nouveau_gpio {
+	struct nouveau_subdev base;
 
-static inline int
-nouveau_gpio_func_set(struct drm_device *dev, u8 tag, int state)
-{
-	return nouveau_gpio_set(dev, 0, tag, 0xff, state);
-}
+	/* hardware interfaces */
+	void (*reset)(struct nouveau_gpio *);
+	int  (*drive)(struct nouveau_gpio *, int line, int dir, int out);
+	int  (*sense)(struct nouveau_gpio *, int line);
+	void (*irq_enable)(struct nouveau_gpio *, int line, bool);
+
+	/* software interfaces */
+	int  (*find)(struct nouveau_gpio *, int idx, u8 tag, u8 line,
+		     struct dcb_gpio_func *);
+	int  (*set)(struct nouveau_gpio *, int idx, u8 tag, u8 line, int state);
+	int  (*get)(struct nouveau_gpio *, int idx, u8 tag, u8 line);
+	int  (*irq)(struct nouveau_gpio *, int idx, u8 tag, u8 line, bool on);
 
-static inline int
-nouveau_gpio_func_get(struct drm_device *dev, u8 tag)
+	/* interrupt handling */
+	struct list_head isr;
+	spinlock_t lock;
+
+	void (*isr_run)(struct nouveau_gpio *, int idx, u32 mask);
+	int  (*isr_add)(struct nouveau_gpio *, int idx, u8 tag, u8 line,
+			void (*)(void *, int state), void *data);
+	void (*isr_del)(struct nouveau_gpio *, int idx, u8 tag, u8 line,
+			void (*)(void *, int state), void *data);
+};
+
+static inline struct nouveau_gpio *
+nouveau_gpio(void *obj)
 {
-	return nouveau_gpio_get(dev, 0, tag, 0xff);
+	return (void *)nv_device(obj)->subdev[NVDEV_SUBDEV_GPIO];
 }
 
+#define nouveau_gpio_create(p,e,o,d)                                           \
+	nouveau_gpio_create_((p), (e), (o), sizeof(**d), (void **)d)
+#define nouveau_gpio_destroy(p)                                                \
+	nouveau_subdev_destroy(&(p)->base)
+#define nouveau_gpio_fini(p,s)                                                 \
+	nouveau_subdev_fini(&(p)->base, (s))
+
+int nouveau_gpio_create_(struct nouveau_object *, struct nouveau_object *,
+			 struct nouveau_oclass *, int, void **);
+int nouveau_gpio_init(struct nouveau_gpio *);
+
+extern struct nouveau_oclass nv10_gpio_oclass;
+extern struct nouveau_oclass nv50_gpio_oclass;
+extern struct nouveau_oclass nvd0_gpio_oclass;
+
+void nv50_gpio_dtor(struct nouveau_object *);
+int  nv50_gpio_init(struct nouveau_object *);
+int  nv50_gpio_fini(struct nouveau_object *, bool);
+void nv50_gpio_intr(struct nouveau_subdev *);
+void nv50_gpio_irq_enable(struct nouveau_gpio *, int line, bool);
+
 #endif

drivers/gpu/drm/nouveau/core/os.h

@@ -15,6 +15,7 @@
 #include <linux/io-mapping.h>
 #include <linux/vmalloc.h>
 #include <linux/acpi.h>
+#include <linux/dmi.h>
 
 #include <asm/unaligned.h>
 

drivers/gpu/drm/nouveau/core/subdev/bios/dcb.c

@@ -0,0 +1,135 @@
+/*
+ * Copyright 2012 Red Hat Inc.
+ *
+ * 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 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 HOLDER(S) OR AUTHOR(S) 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.
+ *
+ * Authors: Ben Skeggs
+ */
+
+#include "core/device.h"
+
+#include "subdev/bios.h"
+#include "subdev/bios/dcb.h"
+
+u16
+dcb_table(struct nouveau_bios *bios, u8 *ver, u8 *hdr, u8 *cnt, u8 *len)
+{
+	struct nouveau_device *device = nv_device(bios);
+	u16 dcb = 0x0000;
+
+	if (device->card_type > NV_04)
+		dcb = nv_ro16(bios, 0x36);
+	if (!dcb) {
+		nv_warn(bios, "DCB table not found\n");
+		return dcb;
+	}
+
+	*ver = nv_ro08(bios, dcb);
+
+	if (*ver >= 0x41) {
+		nv_warn(bios, "DCB *ver 0x%02x unknown\n", *ver);
+		return 0x0000;
+	} else
+	if (*ver >= 0x30) {
+		if (nv_ro32(bios, dcb + 6) == 0x4edcbdcb) {
+			*hdr = nv_ro08(bios, dcb + 1);
+			*cnt = nv_ro08(bios, dcb + 2);
+			*len = nv_ro08(bios, dcb + 3);
+			return dcb;
+		}
+	} else
+	if (*ver >= 0x20) {
+		if (nv_ro32(bios, dcb + 4) == 0x4edcbdcb) {
+			u16 i2c = nv_ro16(bios, dcb + 2);
+			*hdr = 8;
+			*cnt = (i2c - dcb) / 8;
+			*len = 8;
+			return dcb;
+		}
+	} else
+	if (*ver >= 0x15) {
+		if (!nv_strncmp(bios, dcb - 7, 7, "DEV_REC")) {
+			u16 i2c = nv_ro16(bios, dcb + 2);
+			*hdr = 4;
+			*cnt = (i2c - dcb) / 10;
+			*len = 10;
+			return dcb;
+		}
+	} else {
+		/*
+		 * v1.4 (some NV15/16, NV11+) seems the same as v1.5, but
+		 * always has the same single (crt) entry, even when tv-out
+		 * present, so the conclusion is this version cannot really
+		 * be used.
+		 *
+		 * v1.2 tables (some NV6/10, and NV15+) normally have the
+		 * same 5 entries, which are not specific to the card and so
+		 * no use.
+		 *
+		 * v1.2 does have an I2C table that read_dcb_i2c_table can
+		 * handle, but cards exist (nv11 in #14821) with a bad i2c
+		 * table pointer, so use the indices parsed in
+		 * parse_bmp_structure.
+		 *
+		 * v1.1 (NV5+, maybe some NV4) is entirely unhelpful
+		 */
+		nv_warn(bios, "DCB contains no useful data\n");
+		return 0x0000;
+	}
+
+	nv_warn(bios, "DCB header validation failed\n");
+	return 0x0000;
+}
+
+u16
+dcb_outp(struct nouveau_bios *bios, u8 idx, u8 *ver, u8 *len)
+{
+	u8  hdr, cnt;
+	u16 dcb = dcb_table(bios, ver, &hdr, &cnt, len);
+	if (dcb && idx < cnt)
+		return dcb + hdr + (idx * *len);
+	return 0x0000;
+}
+
+int
+dcb_outp_foreach(struct nouveau_bios *bios, void *data,
+		 int (*exec)(struct nouveau_bios *, void *, int, u16))
+{
+	int ret, idx = -1;
+	u8  ver, len;
+	u16 outp;
+
+	while ((outp = dcb_outp(bios, ++idx, &ver, &len))) {
+		if (nv_ro32(bios, outp) == 0x00000000)
+			break; /* seen on an NV11 with DCB v1.5 */
+		if (nv_ro32(bios, outp) == 0xffffffff)
+			break; /* seen on an NV17 with DCB v2.0 */
+
+		if (nv_ro08(bios, outp) == DCB_OUTPUT_UNUSED)
+			continue;
+		if (nv_ro08(bios, outp) == DCB_OUTPUT_EOL)
+			break;
+
+		ret = exec(bios, data, idx, outp);
+		if (ret)
+			return ret;
+	}
+
+	return 0;
+}