2  * Copyright 2007-8 Advanced Micro Devices, Inc.
38 /* bit banging i2c */
42 	struct amdgpu_device *adev = drm_to_adev(i2c->dev);  in amdgpu_i2c_pre_xfer()
43 	struct amdgpu_i2c_bus_rec *rec = &i2c->rec;  in amdgpu_i2c_pre_xfer()
46 	mutex_lock(&i2c->mutex);  in amdgpu_i2c_pre_xfer()
49 	if (rec->hw_capable) {  in amdgpu_i2c_pre_xfer()
50 		temp = RREG32(rec->mask_clk_reg);  in amdgpu_i2c_pre_xfer()
52 		WREG32(rec->mask_clk_reg, temp);  in amdgpu_i2c_pre_xfer()
56 	temp = RREG32(rec->a_clk_reg) & ~rec->a_clk_mask;  in amdgpu_i2c_pre_xfer()
57 	WREG32(rec->a_clk_reg, temp);  in amdgpu_i2c_pre_xfer()
59 	temp = RREG32(rec->a_data_reg) & ~rec->a_data_mask;  in amdgpu_i2c_pre_xfer()
60 	WREG32(rec->a_data_reg, temp);  in amdgpu_i2c_pre_xfer()
63 	temp = RREG32(rec->en_clk_reg) & ~rec->en_clk_mask;  in amdgpu_i2c_pre_xfer()
64 	WREG32(rec->en_clk_reg, temp);  in amdgpu_i2c_pre_xfer()
66 	temp = RREG32(rec->en_data_reg) & ~rec->en_data_mask;  in amdgpu_i2c_pre_xfer()
67 	WREG32(rec->en_data_reg, temp);  in amdgpu_i2c_pre_xfer()
70 	temp = RREG32(rec->mask_clk_reg) | rec->mask_clk_mask;  in amdgpu_i2c_pre_xfer()
71 	WREG32(rec->mask_clk_reg, temp);  in amdgpu_i2c_pre_xfer()
72 	temp = RREG32(rec->mask_clk_reg);  in amdgpu_i2c_pre_xfer()
74 	temp = RREG32(rec->mask_data_reg) | rec->mask_data_mask;  in amdgpu_i2c_pre_xfer()
75 	WREG32(rec->mask_data_reg, temp);  in amdgpu_i2c_pre_xfer()
76 	temp = RREG32(rec->mask_data_reg);  in amdgpu_i2c_pre_xfer()
84 	struct amdgpu_device *adev = drm_to_adev(i2c->dev);  in amdgpu_i2c_post_xfer()
85 	struct amdgpu_i2c_bus_rec *rec = &i2c->rec;  in amdgpu_i2c_post_xfer()
89 	temp = RREG32(rec->mask_clk_reg) & ~rec->mask_clk_mask;  in amdgpu_i2c_post_xfer()
90 	WREG32(rec->mask_clk_reg, temp);  in amdgpu_i2c_post_xfer()
91 	temp = RREG32(rec->mask_clk_reg);  in amdgpu_i2c_post_xfer()
93 	temp = RREG32(rec->mask_data_reg) & ~rec->mask_data_mask;  in amdgpu_i2c_post_xfer()
94 	WREG32(rec->mask_data_reg, temp);  in amdgpu_i2c_post_xfer()
95 	temp = RREG32(rec->mask_data_reg);  in amdgpu_i2c_post_xfer()
97 	mutex_unlock(&i2c->mutex);  in amdgpu_i2c_post_xfer()
103 	struct amdgpu_device *adev = drm_to_adev(i2c->dev);  in amdgpu_i2c_get_clock()
104 	struct amdgpu_i2c_bus_rec *rec = &i2c->rec;  in amdgpu_i2c_get_clock()
108 	val = RREG32(rec->y_clk_reg);  in amdgpu_i2c_get_clock()
109 	val &= rec->y_clk_mask;  in amdgpu_i2c_get_clock()
118 	struct amdgpu_device *adev = drm_to_adev(i2c->dev);  in amdgpu_i2c_get_data()
119 	struct amdgpu_i2c_bus_rec *rec = &i2c->rec;  in amdgpu_i2c_get_data()
123 	val = RREG32(rec->y_data_reg);  in amdgpu_i2c_get_data()
124 	val &= rec->y_data_mask;  in amdgpu_i2c_get_data()
132 	struct amdgpu_device *adev = drm_to_adev(i2c->dev);  in amdgpu_i2c_set_clock()
133 	struct amdgpu_i2c_bus_rec *rec = &i2c->rec;  in amdgpu_i2c_set_clock()
137 	val = RREG32(rec->en_clk_reg) & ~rec->en_clk_mask;  in amdgpu_i2c_set_clock()
138 	val |= clock ? 0 : rec->en_clk_mask;  in amdgpu_i2c_set_clock()
139 	WREG32(rec->en_clk_reg, val);  in amdgpu_i2c_set_clock()
145 	struct amdgpu_device *adev = drm_to_adev(i2c->dev);  in amdgpu_i2c_set_data()
146 	struct amdgpu_i2c_bus_rec *rec = &i2c->rec;  in amdgpu_i2c_set_data()
150 	val = RREG32(rec->en_data_reg) & ~rec->en_data_mask;  in amdgpu_i2c_set_data()
151 	val |= data ? 0 : rec->en_data_mask;  in amdgpu_i2c_set_data()
152 	WREG32(rec->en_data_reg, val);  in amdgpu_i2c_set_data()
168 	if (rec->mm_i2c && (amdgpu_hw_i2c == 0))  in amdgpu_i2c_create()
175 	i2c->rec = *rec;  in amdgpu_i2c_create()
176 	i2c->adapter.owner = THIS_MODULE;  in amdgpu_i2c_create()
177 	i2c->adapter.dev.parent = dev->dev;  in amdgpu_i2c_create()
178 	i2c->dev = dev;  in amdgpu_i2c_create()
179 	i2c_set_adapdata(&i2c->adapter, i2c);  in amdgpu_i2c_create()
180 	mutex_init(&i2c->mutex);  in amdgpu_i2c_create()
181 	if (rec->hw_capable &&  in amdgpu_i2c_create()
184 		snprintf(i2c->adapter.name, sizeof(i2c->adapter.name),  in amdgpu_i2c_create()
186 		i2c->adapter.algo = &amdgpu_atombios_i2c_algo;  in amdgpu_i2c_create()
187 		ret = devm_i2c_add_adapter(dev->dev, &i2c->adapter);  in amdgpu_i2c_create()
191 		/* set the amdgpu bit adapter */  in amdgpu_i2c_create()
192 		snprintf(i2c->adapter.name, sizeof(i2c->adapter.name),  in amdgpu_i2c_create()
193 			 "AMDGPU i2c bit bus %s", name);  in amdgpu_i2c_create()
194 		i2c->adapter.algo_data = &i2c->bit;  in amdgpu_i2c_create()
195 		i2c->bit.pre_xfer = amdgpu_i2c_pre_xfer;  in amdgpu_i2c_create()
196 		i2c->bit.post_xfer = amdgpu_i2c_post_xfer;  in amdgpu_i2c_create()
197 		i2c->bit.setsda = amdgpu_i2c_set_data;  in amdgpu_i2c_create()
198 		i2c->bit.setscl = amdgpu_i2c_set_clock;  in amdgpu_i2c_create()
199 		i2c->bit.getsda = amdgpu_i2c_get_data;  in amdgpu_i2c_create()
200 		i2c->bit.getscl = amdgpu_i2c_get_clock;  in amdgpu_i2c_create()
201 		i2c->bit.udelay = 10;  in amdgpu_i2c_create()
202 		i2c->bit.timeout = usecs_to_jiffies(2200);	/* from VESA */  in amdgpu_i2c_create()
203 		i2c->bit.data = i2c;  in amdgpu_i2c_create()
204 		ret = i2c_bit_add_bus(&i2c->adapter);  in amdgpu_i2c_create()
206 			DRM_ERROR("Failed to register bit i2c %s\n", name);  in amdgpu_i2c_create()
220 	if (!adev->is_atom_fw) {  in amdgpu_i2c_init()
224 			switch (adev->asic_type) {  in amdgpu_i2c_init()
243 		if (adev->i2c_bus[i])  in amdgpu_i2c_fini()
244 			adev->i2c_bus[i] = NULL;  in amdgpu_i2c_fini()
255 		if (adev->i2c_bus[i] &&  in amdgpu_i2c_lookup()
256 		    (adev->i2c_bus[i]->rec.i2c_id == i2c_bus->i2c_id)) {  in amdgpu_i2c_lookup()
257 			return adev->i2c_bus[i];  in amdgpu_i2c_lookup()
288 	if (i2c_transfer(&i2c_bus->adapter, msgs, 2) != 2) {  in amdgpu_i2c_get_byte()
290 		return -EIO;  in amdgpu_i2c_get_byte()
315 	if (i2c_transfer(&i2c_bus->adapter, &msg, 1) != 1) {  in amdgpu_i2c_put_byte()
317 		return -EIO;  in amdgpu_i2c_put_byte()
329 	if (!amdgpu_connector->router.ddc_valid)  in amdgpu_i2c_router_select_ddc_port()
332 	if (!amdgpu_connector->router_bus)  in amdgpu_i2c_router_select_ddc_port()
335 	if (amdgpu_i2c_get_byte(amdgpu_connector->router_bus,  in amdgpu_i2c_router_select_ddc_port()
336 			    amdgpu_connector->router.i2c_addr,  in amdgpu_i2c_router_select_ddc_port()
339 	val &= ~amdgpu_connector->router.ddc_mux_control_pin;  in amdgpu_i2c_router_select_ddc_port()
340 	amdgpu_i2c_put_byte(amdgpu_connector->router_bus,  in amdgpu_i2c_router_select_ddc_port()
341 			    amdgpu_connector->router.i2c_addr,  in amdgpu_i2c_router_select_ddc_port()
343 	if (amdgpu_i2c_get_byte(amdgpu_connector->router_bus,  in amdgpu_i2c_router_select_ddc_port()
344 			    amdgpu_connector->router.i2c_addr,  in amdgpu_i2c_router_select_ddc_port()
347 	val &= ~amdgpu_connector->router.ddc_mux_control_pin;  in amdgpu_i2c_router_select_ddc_port()
348 	val |= amdgpu_connector->router.ddc_mux_state;  in amdgpu_i2c_router_select_ddc_port()
349 	amdgpu_i2c_put_byte(amdgpu_connector->router_bus,  in amdgpu_i2c_router_select_ddc_port()
350 			    amdgpu_connector->router.i2c_addr,  in amdgpu_i2c_router_select_ddc_port()
360 	if (!amdgpu_connector->router.cd_valid)  in amdgpu_i2c_router_select_cd_port()
363 	if (!amdgpu_connector->router_bus)  in amdgpu_i2c_router_select_cd_port()
366 	if (amdgpu_i2c_get_byte(amdgpu_connector->router_bus,  in amdgpu_i2c_router_select_cd_port()
367 			    amdgpu_connector->router.i2c_addr,  in amdgpu_i2c_router_select_cd_port()
370 	val &= ~amdgpu_connector->router.cd_mux_control_pin;  in amdgpu_i2c_router_select_cd_port()
371 	amdgpu_i2c_put_byte(amdgpu_connector->router_bus,  in amdgpu_i2c_router_select_cd_port()
372 			    amdgpu_connector->router.i2c_addr,  in amdgpu_i2c_router_select_cd_port()
374 	if (amdgpu_i2c_get_byte(amdgpu_connector->router_bus,  in amdgpu_i2c_router_select_cd_port()
375 			    amdgpu_connector->router.i2c_addr,  in amdgpu_i2c_router_select_cd_port()
378 	val &= ~amdgpu_connector->router.cd_mux_control_pin;  in amdgpu_i2c_router_select_cd_port()
379 	val |= amdgpu_connector->router.cd_mux_state;  in amdgpu_i2c_router_select_cd_port()
380 	amdgpu_i2c_put_byte(amdgpu_connector->router_bus,  in amdgpu_i2c_router_select_cd_port()
381 			    amdgpu_connector->router.i2c_addr,  in amdgpu_i2c_router_select_cd_port()