drm/nouveau/i2c: port to subdev interfaces

v2/v3: Ben Skeggs <bskeggs@redhat.com>
- fix typo in default bus selection
- fix accidental loss of destructor

v4: Dmitry Eremin-Solenikov <dmitry_eremin@mentor.com>
- fix typo causing incorrect default i2c port settings when no BMP data

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

drivers/gpu/drm/nouveau/Makefile

@@ -22,6 +22,7 @@ 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/bios/i2c.o
 nouveau-y += core/subdev/device/base.o
 nouveau-y += core/subdev/device/nv04.o
 nouveau-y += core/subdev/device/nv10.o
@@ -45,6 +46,8 @@ 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/i2c/aux.o
+nouveau-y += core/subdev/i2c/bit.o
 nouveau-y += core/subdev/instmem/nv04.o
 nouveau-y += core/subdev/instmem/nv50.o
 nouveau-y += core/subdev/instmem/nvc0.o
@@ -61,6 +64,7 @@ nouveau-y += core/engine/copy/nva3.o
 nouveau-y += core/engine/copy/nvc0.o
 nouveau-y += core/engine/crypt/nv84.o
 nouveau-y += core/engine/crypt/nv98.o
+nouveau-y += core/engine/disp/vga.o
 nouveau-y += core/engine/fifo/nv04.o
 nouveau-y += core/engine/fifo/nv10.o
 nouveau-y += core/engine/fifo/nv17.o

drivers/gpu/drm/nouveau/core/engine/disp/vga.c

@@ -0,0 +1,214 @@
+/*
+ * 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/subdev.h>
+#include <core/device.h>
+
+u8
+nv_rdport(void *obj, int head, u16 port)
+{
+	struct nouveau_device *device = nv_device(obj);
+
+	if (device->card_type >= NV_50)
+		return nv_rd08(obj, 0x601000 + port);
+
+	if (port == 0x03c0 || port == 0x03c1 ||	/* AR */
+	    port == 0x03c2 || port == 0x03da ||	/* INP0 */
+	    port == 0x03d4 || port == 0x03d5)	/* CR */
+		return nv_rd08(obj, 0x601000 + (head * 0x2000) + port);
+
+	if (port == 0x03c2 || port == 0x03cc ||	/* MISC */
+	    port == 0x03c4 || port == 0x03c5 ||	/* SR */
+	    port == 0x03ce || port == 0x03cf) {	/* GR */
+		if (device->card_type < NV_40)
+			head = 0; /* CR44 selects head */
+		return nv_rd08(obj, 0x0c0000 + (head * 0x2000) + port);
+	}
+
+	nv_error(obj, "unknown vga port 0x%04x\n", port);
+	return 0x00;
+}
+
+void
+nv_wrport(void *obj, int head, u16 port, u8 data)
+{
+	struct nouveau_device *device = nv_device(obj);
+
+	if (device->card_type >= NV_50)
+		nv_wr08(obj, 0x601000 + port, data);
+	else
+	if (port == 0x03c0 || port == 0x03c1 ||	/* AR */
+	    port == 0x03c2 || port == 0x03da ||	/* INP0 */
+	    port == 0x03d4 || port == 0x03d5)	/* CR */
+		nv_wr08(obj, 0x601000 + (head * 0x2000) + port, data);
+	else
+	if (port == 0x03c2 || port == 0x03cc ||	/* MISC */
+	    port == 0x03c4 || port == 0x03c5 ||	/* SR */
+	    port == 0x03ce || port == 0x03cf) {	/* GR */
+		if (device->card_type < NV_40)
+			head = 0; /* CR44 selects head */
+		nv_wr08(obj, 0x0c0000 + (head * 0x2000) + port, data);
+	} else
+		nv_error(obj, "unknown vga port 0x%04x\n", port);
+}
+
+u8
+nv_rdvgas(void *obj, int head, u8 index)
+{
+	nv_wrport(obj, head, 0x03c4, index);
+	return nv_rdport(obj, head, 0x03c5);
+}
+
+void
+nv_wrvgas(void *obj, int head, u8 index, u8 value)
+{
+	nv_wrport(obj, head, 0x03c4, index);
+	nv_wrport(obj, head, 0x03c5, value);
+}
+
+u8
+nv_rdvgag(void *obj, int head, u8 index)
+{
+	nv_wrport(obj, head, 0x03ce, index);
+	return nv_rdport(obj, head, 0x03cf);
+}
+
+void
+nv_wrvgag(void *obj, int head, u8 index, u8 value)
+{
+	nv_wrport(obj, head, 0x03ce, index);
+	nv_wrport(obj, head, 0x03cf, value);
+}
+
+u8
+nv_rdvgac(void *obj, int head, u8 index)
+{
+	nv_wrport(obj, head, 0x03d4, index);
+	return nv_rdport(obj, head, 0x03d5);
+}
+
+void
+nv_wrvgac(void *obj, int head, u8 index, u8 value)
+{
+	nv_wrport(obj, head, 0x03d4, index);
+	nv_wrport(obj, head, 0x03d5, value);
+}
+
+u8
+nv_rdvgai(void *obj, int head, u16 port, u8 index)
+{
+	if (port == 0x03c4) return nv_rdvgas(obj, head, index);
+	if (port == 0x03ce) return nv_rdvgag(obj, head, index);
+	if (port == 0x03d4) return nv_rdvgac(obj, head, index);
+	nv_error(obj, "unknown indexed vga port 0x%04x\n", port);
+	return 0x00;
+}
+
+void
+nv_wrvgai(void *obj, int head, u16 port, u8 index, u8 value)
+{
+	if      (port == 0x03c4) nv_wrvgas(obj, head, index, value);
+	else if (port == 0x03ce) nv_wrvgag(obj, head, index, value);
+	else if (port == 0x03d4) nv_wrvgac(obj, head, index, value);
+	else nv_error(obj, "unknown indexed vga port 0x%04x\n", port);
+}
+
+bool
+nv_lockvgac(void *obj, bool lock)
+{
+	bool locked = !nv_rdvgac(obj, 0, 0x1f);
+	u8 data = lock ? 0x99 : 0x57;
+	nv_wrvgac(obj, 0, 0x1f, data);
+	if (nv_device(obj)->chipset == 0x11) {
+		if (!(nv_rd32(obj, 0x001084) & 0x10000000))
+			nv_wrvgac(obj, 1, 0x1f, data);
+	}
+	return locked;
+}
+
+/* CR44 takes values 0 (head A), 3 (head B) and 4 (heads tied)
+ * it affects only the 8 bit vga io regs, which we access using mmio at
+ * 0xc{0,2}3c*, 0x60{1,3}3*, and 0x68{1,3}3d*
+ * in general, the set value of cr44 does not matter: reg access works as
+ * expected and values can be set for the appropriate head by using a 0x2000
+ * offset as required
+ * however:
+ * a) pre nv40, the head B range of PRMVIO regs at 0xc23c* was not exposed and
+ *    cr44 must be set to 0 or 3 for accessing values on the correct head
+ *    through the common 0xc03c* addresses
+ * b) in tied mode (4) head B is programmed to the values set on head A, and
+ *    access using the head B addresses can have strange results, ergo we leave
+ *    tied mode in init once we know to what cr44 should be restored on exit
+ *
+ * the owner parameter is slightly abused:
+ * 0 and 1 are treated as head values and so the set value is (owner * 3)
+ * other values are treated as literal values to set
+ */
+u8
+nv_rdvgaowner(void *obj)
+{
+	if (nv_device(obj)->card_type < NV_50) {
+		if (nv_device(obj)->chipset == 0x11) {
+			u32 tied = nv_rd32(obj, 0x001084) & 0x10000000;
+			if (tied == 0) {
+				u8 slA = nv_rdvgac(obj, 0, 0x28) & 0x80;
+				u8 tvA = nv_rdvgac(obj, 0, 0x33) & 0x01;
+				u8 slB = nv_rdvgac(obj, 1, 0x28) & 0x80;
+				u8 tvB = nv_rdvgac(obj, 1, 0x33) & 0x01;
+				if (slA && !tvA) return 0x00;
+				if (slB && !tvB) return 0x03;
+				if (slA) return 0x00;
+				if (slB) return 0x03;
+				return 0x00;
+			}
+			return 0x04;
+		}
+
+		return nv_rdvgac(obj, 0, 0x44);
+	}
+
+	nv_error(obj, "rdvgaowner after nv4x\n");
+	return 0x00;
+}
+
+void
+nv_wrvgaowner(void *obj, u8 select)
+{
+	if (nv_device(obj)->card_type < NV_50) {
+		u8 owner = (select == 1) ? 3 : select;
+		if (nv_device(obj)->chipset == 0x11) {
+			/* workaround hw lockup bug */
+			nv_rdvgac(obj, 0, 0x1f);
+			nv_rdvgac(obj, 1, 0x1f);
+		}
+
+		nv_wrvgac(obj, 0, 0x44, owner);
+
+		if (nv_device(obj)->chipset == 0x11) {
+			nv_wrvgac(obj, 0, 0x2e, owner);
+			nv_wrvgac(obj, 0, 0x2e, owner);
+		}
+	} else
+		nv_error(obj, "wrvgaowner after nv4x\n");
+}

drivers/gpu/drm/nouveau/core/include/subdev/bios/i2c.h

@@ -0,0 +1,25 @@
+#ifndef __NVBIOS_I2C_H__
+#define __NVBIOS_I2C_H__
+
+struct nouveau_bios;
+
+enum dcb_i2c_type {
+	DCB_I2C_NV04_BIT = 0,
+	DCB_I2C_NV4E_BIT = 4,
+	DCB_I2C_NVIO_BIT = 5,
+	DCB_I2C_NVIO_AUX = 6,
+	DCB_I2C_UNUSED = 0xff
+};
+
+struct dcb_i2c_entry {
+	enum dcb_i2c_type type;
+	u8 drive;
+	u8 sense;
+	u32 data;
+};
+
+u16 dcb_i2c_table(struct nouveau_bios *, u8 *ver, u8 *hdr, u8 *cnt, u8 *len);
+u16 dcb_i2c_entry(struct nouveau_bios *, u8 index, u8 *ver, u8 *len);
+int dcb_i2c_parse(struct nouveau_bios *, u8 index, struct dcb_i2c_entry *);
+
+#endif

drivers/gpu/drm/nouveau/core/include/subdev/i2c.h

@@ -1,39 +1,18 @@
-/*
- * Copyright 2009 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_I2C_H__
 #define __NOUVEAU_I2C_H__
 
-#include <linux/i2c.h>
-#include <linux/i2c-algo-bit.h>
-#include "drm_dp_helper.h"
+#include <core/subdev.h>
+#include <core/device.h>
+
+#include <subdev/bios.h>
+#include <subdev/bios/i2c.h>
 
 #define NV_I2C_PORT(n)    (0x00 + (n))
-#define NV_I2C_PORT_NUM    0x10
 #define NV_I2C_DEFAULT(n) (0x80 + (n))
 
-struct nouveau_i2c_chan {
+struct nouveau_i2c_port {
 	struct i2c_adapter adapter;
-	struct drm_device *dev;
+	struct nouveau_i2c *i2c;
 	struct i2c_algo_bit_data bit;
 	struct list_head head;
 	u8  index;
@@ -44,16 +23,38 @@ struct nouveau_i2c_chan {
 	u32 state;
 };
 
-int  nouveau_i2c_init(struct drm_device *);
-void nouveau_i2c_fini(struct drm_device *);
-struct nouveau_i2c_chan *nouveau_i2c_find(struct drm_device *, u8 index);
-bool nouveau_probe_i2c_addr(struct nouveau_i2c_chan *i2c, int addr);
-int nouveau_i2c_identify(struct drm_device *dev, const char *what,
-			 struct i2c_board_info *info,
-			 bool (*match)(struct nouveau_i2c_chan *,
-				       struct i2c_board_info *),
-			 int index);
+struct nouveau_i2c {
+	struct nouveau_subdev base;
+
+	struct nouveau_i2c_port *(*find)(struct nouveau_i2c *, u8 index);
+	int (*identify)(struct nouveau_i2c *, int index,
+			const char *what, struct i2c_board_info *,
+			bool (*match)(struct nouveau_i2c_port *,
+				      struct i2c_board_info *));
+	struct list_head ports;
+};
+
+static inline struct nouveau_i2c *
+nouveau_i2c(void *obj)
+{
+	return (void *)nv_device(obj)->subdev[NVDEV_SUBDEV_I2C];
+}
+
+extern struct nouveau_oclass nouveau_i2c_oclass;
+
+void nouveau_i2c_drive_scl(void *, int);
+void nouveau_i2c_drive_sda(void *, int);
+int  nouveau_i2c_sense_scl(void *);
+int  nouveau_i2c_sense_sda(void *);
+
+int  nv_rdi2cr(struct nouveau_i2c_port *, u8 addr, u8 reg);
+int  nv_wri2cr(struct nouveau_i2c_port *, u8 addr, u8 reg, u8 val);
+bool nv_probe_i2c(struct nouveau_i2c_port *, u8 addr);
+
+int nv_rdaux(struct nouveau_i2c_port *, u32 addr, u8 *data, u8 size);
+int nv_wraux(struct nouveau_i2c_port *, u32 addr, u8 *data, u8 size);
 
-extern const struct i2c_algorithm nouveau_dp_i2c_algo;
+extern const struct i2c_algorithm nouveau_i2c_bit_algo;
+extern const struct i2c_algorithm nouveau_i2c_aux_algo;
 
-#endif /* __NOUVEAU_I2C_H__ */
+#endif

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

@@ -0,0 +1,28 @@
+#ifndef __NOUVEAU_VGA_H__
+#define __NOUVEAU_VGA_H__
+
+/* access to various legacy io ports */
+u8   nv_rdport(void *obj, int head, u16 port);
+void nv_wrport(void *obj, int head, u16 port, u8 value);
+
+/* VGA Sequencer */
+u8   nv_rdvgas(void *obj, int head, u8 index);
+void nv_wrvgas(void *obj, int head, u8 index, u8 value);
+
+/* VGA Graphics */
+u8   nv_rdvgag(void *obj, int head, u8 index);
+void nv_wrvgag(void *obj, int head, u8 index, u8 value);
+
+/* VGA CRTC */
+u8   nv_rdvgac(void *obj, int head, u8 index);
+void nv_wrvgac(void *obj, int head, u8 index, u8 value);
+
+/* VGA indexed port access dispatcher */
+u8   nv_rdvgai(void *obj, int head, u16 port, u8 index);
+void nv_wrvgai(void *obj, int head, u16 port, u8 index, u8 value);
+
+bool nv_lockvgac(void *obj, bool lock);
+u8   nv_rdvgaowner(void *obj);
+void nv_wrvgaowner(void *obj, u8);
+
+#endif