40 	int (*map_io)(struct v3020 *chip, struct platform_device *pdev,
42 	void (*unmap_io)(struct v3020 *chip);
43 	unsigned char (*read_bit)(struct v3020 *chip);
44 	void (*write_bit)(struct v3020 *chip, unsigned char bit);
66 static int v3020_mmio_map(struct v3020 *chip, struct platform_device *pdev,  in v3020_mmio_map()  argument
75 	chip->leftshift = pdata->leftshift;  in v3020_mmio_map()
76 	chip->ioaddress = ioremap(pdev->resource[0].start, 1);  in v3020_mmio_map()
77 	if (chip->ioaddress == NULL)  in v3020_mmio_map()
83 static void v3020_mmio_unmap(struct v3020 *chip)  in v3020_mmio_unmap()  argument
85 	iounmap(chip->ioaddress);  in v3020_mmio_unmap()
88 static void v3020_mmio_write_bit(struct v3020 *chip, unsigned char bit)  in v3020_mmio_write_bit()  argument
90 	writel(bit << chip->leftshift, chip->ioaddress);  in v3020_mmio_write_bit()
93 static unsigned char v3020_mmio_read_bit(struct v3020 *chip)  in v3020_mmio_read_bit()  argument
95 	return !!(readl(chip->ioaddress) & (1 << chip->leftshift));  in v3020_mmio_read_bit()
112 static int v3020_gpio_map(struct v3020 *chip, struct platform_device *pdev,  in v3020_gpio_map()  argument
125 		chip->gpio = v3020_gpio;  in v3020_gpio_map()
130 static void v3020_gpio_unmap(struct v3020 *chip)  in v3020_gpio_unmap()  argument
135 static void v3020_gpio_write_bit(struct v3020 *chip, unsigned char bit)  in v3020_gpio_write_bit()  argument
137 	gpio_direction_output(chip->gpio[V3020_IO].gpio, bit);  in v3020_gpio_write_bit()
138 	gpio_set_value(chip->gpio[V3020_CS].gpio, 0);  in v3020_gpio_write_bit()
139 	gpio_set_value(chip->gpio[V3020_WR].gpio, 0);  in v3020_gpio_write_bit()
141 	gpio_set_value(chip->gpio[V3020_WR].gpio, 1);  in v3020_gpio_write_bit()
142 	gpio_set_value(chip->gpio[V3020_CS].gpio, 1);  in v3020_gpio_write_bit()
145 static unsigned char v3020_gpio_read_bit(struct v3020 *chip)  in v3020_gpio_read_bit()  argument
149 	gpio_direction_input(chip->gpio[V3020_IO].gpio);  in v3020_gpio_read_bit()
150 	gpio_set_value(chip->gpio[V3020_CS].gpio, 0);  in v3020_gpio_read_bit()
151 	gpio_set_value(chip->gpio[V3020_RD].gpio, 0);  in v3020_gpio_read_bit()
153 	bit = !!gpio_get_value(chip->gpio[V3020_IO].gpio);  in v3020_gpio_read_bit()
155 	gpio_set_value(chip->gpio[V3020_RD].gpio, 1);  in v3020_gpio_read_bit()
156 	gpio_set_value(chip->gpio[V3020_CS].gpio, 1);  in v3020_gpio_read_bit()
168 static void v3020_set_reg(struct v3020 *chip, unsigned char address,  in v3020_set_reg()  argument
176 		chip->ops->write_bit(chip, (tmp & 1));  in v3020_set_reg()
184 			chip->ops->write_bit(chip, (data & 1));  in v3020_set_reg()
191 static unsigned char v3020_get_reg(struct v3020 *chip, unsigned char address)  in v3020_get_reg()  argument
197 		chip->ops->write_bit(chip, (address & 1));  in v3020_get_reg()
204 		if (chip->ops->read_bit(chip))  in v3020_get_reg()
214 	struct v3020 *chip = dev_get_drvdata(dev);  in v3020_read_time()  local
218 	v3020_set_reg(chip, V3020_CMD_CLOCK2RAM, 0);  in v3020_read_time()
221 	tmp = v3020_get_reg(chip, V3020_SECONDS);  in v3020_read_time()
223 	tmp = v3020_get_reg(chip, V3020_MINUTES);  in v3020_read_time()
225 	tmp = v3020_get_reg(chip, V3020_HOURS);  in v3020_read_time()
227 	tmp = v3020_get_reg(chip, V3020_MONTH_DAY);  in v3020_read_time()
229 	tmp = v3020_get_reg(chip, V3020_MONTH);  in v3020_read_time()
231 	tmp = v3020_get_reg(chip, V3020_WEEK_DAY);  in v3020_read_time()
233 	tmp = v3020_get_reg(chip, V3020_YEAR);  in v3020_read_time()
251 	struct v3020 *chip = dev_get_drvdata(dev);  in v3020_set_time()  local
262 	v3020_set_reg(chip, V3020_SECONDS,	bin2bcd(dt->tm_sec));  in v3020_set_time()
263 	v3020_set_reg(chip, V3020_MINUTES,	bin2bcd(dt->tm_min));  in v3020_set_time()
264 	v3020_set_reg(chip, V3020_HOURS,	bin2bcd(dt->tm_hour));  in v3020_set_time()
265 	v3020_set_reg(chip, V3020_MONTH_DAY,	bin2bcd(dt->tm_mday));  in v3020_set_time()
266 	v3020_set_reg(chip, V3020_MONTH,	bin2bcd(dt->tm_mon + 1));  in v3020_set_time()
267 	v3020_set_reg(chip, V3020_WEEK_DAY,	bin2bcd(dt->tm_wday));  in v3020_set_time()
268 	v3020_set_reg(chip, V3020_YEAR,		bin2bcd(dt->tm_year % 100));  in v3020_set_time()
271 	v3020_set_reg(chip, V3020_CMD_RAM2CLOCK, 0);  in v3020_set_time()
288 	struct v3020 *chip;  in rtc_probe()  local
293 	chip = devm_kzalloc(&pdev->dev, sizeof(*chip), GFP_KERNEL);  in rtc_probe()
294 	if (!chip)  in rtc_probe()
298 		chip->ops = &v3020_gpio_ops;  in rtc_probe()
300 		chip->ops = &v3020_mmio_ops;  in rtc_probe()
302 	retval = chip->ops->map_io(chip, pdev, pdata);  in rtc_probe()
309 		temp = chip->ops->read_bit(chip);  in rtc_probe()
313 	v3020_set_reg(chip, V3020_SECONDS, 0x33);  in rtc_probe()
314 	if (v3020_get_reg(chip, V3020_SECONDS) != 0x33) {  in rtc_probe()
321 	v3020_set_reg(chip, V3020_STATUS_0, 0x0);  in rtc_probe()
326 			 chip->gpio[V3020_CS].gpio, chip->gpio[V3020_WR].gpio,  in rtc_probe()
327 			 chip->gpio[V3020_RD].gpio, chip->gpio[V3020_IO].gpio);  in rtc_probe()
333 			 chip->leftshift);  in rtc_probe()
335 	platform_set_drvdata(pdev, chip);  in rtc_probe()
337 	chip->rtc = devm_rtc_device_register(&pdev->dev, "v3020",  in rtc_probe()
339 	if (IS_ERR(chip->rtc)) {  in rtc_probe()
340 		retval = PTR_ERR(chip->rtc);  in rtc_probe()
347 	chip->ops->unmap_io(chip);  in rtc_probe()
354 	struct v3020 *chip = platform_get_drvdata(dev);  in rtc_remove()  local
356 	chip->ops->unmap_io(chip);  in rtc_remove()