drm/gma500/intel_gmbus.c

103 static u32 get_reserved(struct intel_gpio *gpio)
105 	struct drm_psb_private *dev_priv = gpio->dev_priv;
109 	reserved = GMBUS_REG_READ(gpio->reg) &
118 	struct intel_gpio *gpio = data;
119 	struct drm_psb_private *dev_priv = gpio->dev_priv;
120 	u32 reserved = get_reserved(gpio);
121 	GMBUS_REG_WRITE(gpio->reg, reserved | GPIO_CLOCK_DIR_MASK);
122 	GMBUS_REG_WRITE(gpio->reg, reserved);
123 	return (GMBUS_REG_READ(gpio->reg) & GPIO_CLOCK_VAL_IN) != 0;
128 	struct intel_gpio *gpio = data;
129 	struct drm_psb_private *dev_priv = gpio->dev_priv;
130 	u32 reserved = get_reserved(gpio);
131 	GMBUS_REG_WRITE(gpio->reg, reserved | GPIO_DATA_DIR_MASK);
132 	GMBUS_REG_WRITE(gpio->reg, reserved);
133 	return (GMBUS_REG_READ(gpio->reg) & GPIO_DATA_VAL_IN) != 0;
138 	struct intel_gpio *gpio = data;
139 	struct drm_psb_private *dev_priv = gpio->dev_priv;
140 	u32 reserved = get_reserved(gpio);
149 	GMBUS_REG_WRITE(gpio->reg, reserved | clock_bits);
150 	GMBUS_REG_READ(gpio->reg); /* Posting */
155 	struct intel_gpio *gpio = data;
156 	struct drm_psb_private *dev_priv = gpio->dev_priv;
157 	u32 reserved = get_reserved(gpio);
166 	GMBUS_REG_WRITE(gpio->reg, reserved | data_bits);
167 	GMBUS_REG_READ(gpio->reg);
183 	struct intel_gpio *gpio;
188 	gpio = kzalloc(sizeof(struct intel_gpio), GFP_KERNEL);
189 	if (gpio == NULL)
192 	gpio->reg = map_pin_to_reg[pin];
193 	gpio->dev_priv = dev_priv;
195 	snprintf(gpio->adapter.name, sizeof(gpio->adapter.name),
197 	gpio->adapter.owner = THIS_MODULE;
198 	gpio->adapter.algo_data	= &gpio->algo;
199 	gpio->adapter.dev.parent = dev_priv->dev.dev;
200 	gpio->algo.setsda = set_data;
201 	gpio->algo.setscl = set_clock;
202 	gpio->algo.getsda = get_data;
203 	gpio->algo.getscl = get_clock;
204 	gpio->algo.udelay = I2C_RISEFALL_TIME;
205 	gpio->algo.timeout = usecs_to_jiffies(2200);
206 	gpio->algo.data = gpio;
208 	if (i2c_bit_add_bus(&gpio->adapter))
211 	return &gpio->adapter;
214 	kfree(gpio);
224 	struct intel_gpio *gpio = container_of(adapter,
232 	set_data(gpio, 1);
233 	set_clock(gpio, 1);
238 	set_data(gpio, 1);
239 	set_clock(gpio, 1);