drm/radeon/radeon_i2c.c

83 /* bit banging i2c */
87 	struct radeon_i2c_chan *i2c = i2c_get_adapdata(i2c_adap);
88 	struct radeon_device *rdev = i2c->dev->dev_private;
89 	struct radeon_i2c_bus_rec *rec = &i2c->rec;
92 	mutex_lock(&i2c->mutex);
94 	/* RV410 appears to have a bug where the hw i2c in reset
95 	 * holds the i2c port in a bad state - switch hw i2c away before
157 	struct radeon_i2c_chan *i2c = i2c_get_adapdata(i2c_adap);
158 	struct radeon_device *rdev = i2c->dev->dev_private;
159 	struct radeon_i2c_bus_rec *rec = &i2c->rec;
171 	mutex_unlock(&i2c->mutex);
176 	struct radeon_i2c_chan *i2c = i2c_priv;
177 	struct radeon_device *rdev = i2c->dev->dev_private;
178 	struct radeon_i2c_bus_rec *rec = &i2c->rec;
191 	struct radeon_i2c_chan *i2c = i2c_priv;
192 	struct radeon_device *rdev = i2c->dev->dev_private;
193 	struct radeon_i2c_bus_rec *rec = &i2c->rec;
205 	struct radeon_i2c_chan *i2c = i2c_priv;
206 	struct radeon_device *rdev = i2c->dev->dev_private;
207 	struct radeon_i2c_bus_rec *rec = &i2c->rec;
218 	struct radeon_i2c_chan *i2c = i2c_priv;
219 	struct radeon_device *rdev = i2c->dev->dev_private;
220 	struct radeon_i2c_bus_rec *rec = &i2c->rec;
229 /* hw i2c */
311 		DRM_ERROR("i2c: unhandled radeon chip\n");
318 /* hw i2c engine for r1xx-4xx hardware
324 	struct radeon_i2c_chan *i2c = i2c_get_adapdata(i2c_adap);
325 	struct radeon_device *rdev = i2c->dev->dev_private;
326 	struct radeon_i2c_bus_rec *rec = &i2c->rec;
371 				DRM_ERROR("gpio not supported with hw i2c\n");
386 				DRM_ERROR("gpio not supported with hw i2c\n");
405 				DRM_ERROR("gpio not supported with hw i2c\n");
421 				DRM_ERROR("gpio not supported with hw i2c\n");
445 				DRM_ERROR("gpio not supported with hw i2c\n");
481 				DRM_DEBUG("i2c write error 0x%08x\n", tmp);
513 						DRM_DEBUG("i2c read error 0x%08x\n", tmp);
541 						DRM_DEBUG("i2c write error 0x%08x\n", tmp);
571 /* hw i2c engine for r5xx hardware
577 	struct radeon_i2c_chan *i2c = i2c_get_adapdata(i2c_adap);
578 	struct radeon_device *rdev = i2c->dev->dev_private;
579 	struct radeon_i2c_bus_rec *rec = &i2c->rec;
639 		DRM_ERROR("failed to get i2c bus\n");
656 		DRM_ERROR("gpio not supported with hw i2c\n");
689 				DRM_DEBUG("i2c write error 0x%08x\n", tmp);
731 						DRM_DEBUG("i2c read error 0x%08x\n", tmp);
774 						DRM_DEBUG("i2c write error 0x%08x\n", tmp);
810 	struct radeon_i2c_chan *i2c = i2c_get_adapdata(i2c_adap);
811 	struct radeon_device *rdev = i2c->dev->dev_private;
812 	struct radeon_i2c_bus_rec *rec = &i2c->rec;
815 	mutex_lock(&i2c->mutex);
841 		/* XXX fill in hw i2c implementation */
858 		/* XXX fill in hw i2c implementation */
868 		/* XXX fill in hw i2c implementation */
875 		/* XXX fill in hw i2c implementation */
878 		DRM_ERROR("i2c: unhandled radeon chip\n");
883 	mutex_unlock(&i2c->mutex);
908 	struct radeon_i2c_chan *i2c;
915 	i2c = kzalloc(sizeof(struct radeon_i2c_chan), GFP_KERNEL);
916 	if (i2c == NULL)
919 	i2c->rec = *rec;
920 	i2c->adapter.owner = THIS_MODULE;
921 	i2c->adapter.dev.parent = dev->dev;
922 	i2c->dev = dev;
923 	i2c_set_adapdata(&i2c->adapter, i2c);
924 	mutex_init(&i2c->mutex);
930 		/* set the radeon hw i2c adapter */
931 		snprintf(i2c->adapter.name, sizeof(i2c->adapter.name),
932 			 "Radeon i2c hw bus %s", name);
933 		i2c->adapter.algo = &radeon_i2c_algo;
934 		ret = i2c_add_adapter(&i2c->adapter);
940 		/* hw i2c using atom */
941 		snprintf(i2c->adapter.name, sizeof(i2c->adapter.name),
942 			 "Radeon i2c hw bus %s", name);
943 		i2c->adapter.algo = &radeon_atom_i2c_algo;
944 		ret = i2c_add_adapter(&i2c->adapter);
949 		snprintf(i2c->adapter.name, sizeof(i2c->adapter.name),
950 			 "Radeon i2c bit bus %s", name);
951 		i2c->adapter.algo_data = &i2c->bit;
952 		i2c->bit.pre_xfer = pre_xfer;
953 		i2c->bit.post_xfer = post_xfer;
954 		i2c->bit.setsda = set_data;
955 		i2c->bit.setscl = set_clock;
956 		i2c->bit.getsda = get_data;
957 		i2c->bit.getscl = get_clock;
958 		i2c->bit.udelay = 10;
959 		i2c->bit.timeout = usecs_to_jiffies(2200);	/* from VESA */
960 		i2c->bit.data = i2c;
961 		ret = i2c_bit_add_bus(&i2c->adapter);
963 			DRM_ERROR("Failed to register bit i2c %s\n", name);
968 	return i2c;
970 	kfree(i2c);
975 void radeon_i2c_destroy(struct radeon_i2c_chan *i2c)
977 	if (!i2c)
979 	WARN_ON(i2c->has_aux);
980 	i2c_del_adapter(&i2c->adapter);
981 	kfree(i2c);
1069 		DRM_DEBUG("i2c 0x%02x 0x%02x read failed\n",
1091 		DRM_DEBUG("i2c 0x%02x 0x%02x write failed\n",