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);
71 static int v3020_mmio_map(struct v3020 *chip, struct platform_device *pdev,  in v3020_mmio_map()  argument
80 	chip->leftshift = pdata->leftshift;  in v3020_mmio_map()
81 	chip->ioaddress = ioremap(pdev->resource[0].start, 1);  in v3020_mmio_map()
82 	if (chip->ioaddress == NULL)  in v3020_mmio_map()
88 static void v3020_mmio_unmap(struct v3020 *chip)  in v3020_mmio_unmap()  argument
90 	iounmap(chip->ioaddress);  in v3020_mmio_unmap()
93 static void v3020_mmio_write_bit(struct v3020 *chip, unsigned char bit)  in v3020_mmio_write_bit()  argument
95 	writel(bit << chip->leftshift, chip->ioaddress);  in v3020_mmio_write_bit()
98 static unsigned char v3020_mmio_read_bit(struct v3020 *chip)  in v3020_mmio_read_bit()  argument
100 	return !!(readl(chip->ioaddress) & (1 << chip->leftshift));  in v3020_mmio_read_bit()
117 static int v3020_gpio_map(struct v3020 *chip, struct platform_device *pdev,  in v3020_gpio_map()  argument
135 	chip->gpio = v3020_gpio;  in v3020_gpio_map()
146 static void v3020_gpio_unmap(struct v3020 *chip)  in v3020_gpio_unmap()  argument
154 static void v3020_gpio_write_bit(struct v3020 *chip, unsigned char bit)  in v3020_gpio_write_bit()  argument
156 	gpio_direction_output(chip->gpio[V3020_IO].gpio, bit);  in v3020_gpio_write_bit()
157 	gpio_set_value(chip->gpio[V3020_CS].gpio, 0);  in v3020_gpio_write_bit()
158 	gpio_set_value(chip->gpio[V3020_WR].gpio, 0);  in v3020_gpio_write_bit()
160 	gpio_set_value(chip->gpio[V3020_WR].gpio, 1);  in v3020_gpio_write_bit()
161 	gpio_set_value(chip->gpio[V3020_CS].gpio, 1);  in v3020_gpio_write_bit()
164 static unsigned char v3020_gpio_read_bit(struct v3020 *chip)  in v3020_gpio_read_bit()  argument
168 	gpio_direction_input(chip->gpio[V3020_IO].gpio);  in v3020_gpio_read_bit()
169 	gpio_set_value(chip->gpio[V3020_CS].gpio, 0);  in v3020_gpio_read_bit()
170 	gpio_set_value(chip->gpio[V3020_RD].gpio, 0);  in v3020_gpio_read_bit()
172 	bit = !!gpio_get_value(chip->gpio[V3020_IO].gpio);  in v3020_gpio_read_bit()
174 	gpio_set_value(chip->gpio[V3020_RD].gpio, 1);  in v3020_gpio_read_bit()
175 	gpio_set_value(chip->gpio[V3020_CS].gpio, 1);  in v3020_gpio_read_bit()
187 static void v3020_set_reg(struct v3020 *chip, unsigned char address,  in v3020_set_reg()  argument
195 		chip->ops->write_bit(chip, (tmp & 1));  in v3020_set_reg()
203 			chip->ops->write_bit(chip, (data & 1));  in v3020_set_reg()
210 static unsigned char v3020_get_reg(struct v3020 *chip, unsigned char address)  in v3020_get_reg()  argument
216 		chip->ops->write_bit(chip, (address & 1));  in v3020_get_reg()
223 		if (chip->ops->read_bit(chip))  in v3020_get_reg()
233 	struct v3020 *chip = dev_get_drvdata(dev);  in v3020_read_time()  local
237 	v3020_set_reg(chip, V3020_CMD_CLOCK2RAM, 0);  in v3020_read_time()
240 	tmp = v3020_get_reg(chip, V3020_SECONDS);  in v3020_read_time()
242 	tmp = v3020_get_reg(chip, V3020_MINUTES);  in v3020_read_time()
244 	tmp = v3020_get_reg(chip, V3020_HOURS);  in v3020_read_time()
246 	tmp = v3020_get_reg(chip, V3020_MONTH_DAY);  in v3020_read_time()
248 	tmp = v3020_get_reg(chip, V3020_MONTH);  in v3020_read_time()
250 	tmp = v3020_get_reg(chip, V3020_WEEK_DAY);  in v3020_read_time()
252 	tmp = v3020_get_reg(chip, V3020_YEAR);  in v3020_read_time()
270 	struct v3020 *chip = dev_get_drvdata(dev);  in v3020_set_time()  local
281 	v3020_set_reg(chip, V3020_SECONDS,	bin2bcd(dt->tm_sec));  in v3020_set_time()
282 	v3020_set_reg(chip, V3020_MINUTES,	bin2bcd(dt->tm_min));  in v3020_set_time()
283 	v3020_set_reg(chip, V3020_HOURS,	bin2bcd(dt->tm_hour));  in v3020_set_time()
284 	v3020_set_reg(chip, V3020_MONTH_DAY,	bin2bcd(dt->tm_mday));  in v3020_set_time()
285 	v3020_set_reg(chip, V3020_MONTH,	bin2bcd(dt->tm_mon + 1));  in v3020_set_time()
286 	v3020_set_reg(chip, V3020_WEEK_DAY,	bin2bcd(dt->tm_wday));  in v3020_set_time()
287 	v3020_set_reg(chip, V3020_YEAR,		bin2bcd(dt->tm_year % 100));  in v3020_set_time()
290 	v3020_set_reg(chip, V3020_CMD_RAM2CLOCK, 0);  in v3020_set_time()
307 	struct v3020 *chip;  in rtc_probe()  local
312 	chip = devm_kzalloc(&pdev->dev, sizeof(*chip), GFP_KERNEL);  in rtc_probe()
313 	if (!chip)  in rtc_probe()
317 		chip->ops = &v3020_gpio_ops;  in rtc_probe()
319 		chip->ops = &v3020_mmio_ops;  in rtc_probe()
321 	retval = chip->ops->map_io(chip, pdev, pdata);  in rtc_probe()
328 		temp = chip->ops->read_bit(chip);  in rtc_probe()
332 	v3020_set_reg(chip, V3020_SECONDS, 0x33);  in rtc_probe()
333 	if (v3020_get_reg(chip, V3020_SECONDS) != 0x33) {  in rtc_probe()
340 	v3020_set_reg(chip, V3020_STATUS_0, 0x0);  in rtc_probe()
345 			 chip->gpio[V3020_CS].gpio, chip->gpio[V3020_WR].gpio,  in rtc_probe()
346 			 chip->gpio[V3020_RD].gpio, chip->gpio[V3020_IO].gpio);  in rtc_probe()
352 			 chip->leftshift);  in rtc_probe()
354 	platform_set_drvdata(pdev, chip);  in rtc_probe()
356 	chip->rtc = devm_rtc_device_register(&pdev->dev, "v3020",  in rtc_probe()
358 	if (IS_ERR(chip->rtc)) {  in rtc_probe()
359 		retval = PTR_ERR(chip->rtc);  in rtc_probe()
366 	chip->ops->unmap_io(chip);  in rtc_probe()
373 	struct v3020 *chip = platform_get_drvdata(dev);  in rtc_remove()  local
375 	chip->ops->unmap_io(chip);  in rtc_remove()