23 #include <linux/mfd/ipaq-micro.h>
32 static void ipaq_micro_trigger_tx(struct ipaq_micro *micro)  in ipaq_micro_trigger_tx()  argument
34 	struct ipaq_micro_txdev *tx = &micro->tx;  in ipaq_micro_trigger_tx()
35 	struct ipaq_micro_msg *msg = micro->msg;  in ipaq_micro_trigger_tx()
56 	val = readl(micro->base + UTCR3);  in ipaq_micro_trigger_tx()
58 	writel(val, micro->base + UTCR3);  in ipaq_micro_trigger_tx()
61 int ipaq_micro_tx_msg(struct ipaq_micro *micro, struct ipaq_micro_msg *msg)  in ipaq_micro_tx_msg()  argument
65 	dev_dbg(micro->dev, "TX msg: %02x, %d bytes\n", msg->id, msg->tx_len);  in ipaq_micro_tx_msg()
67 	spin_lock_irqsave(&micro->lock, flags);  in ipaq_micro_tx_msg()
68 	if (micro->msg) {  in ipaq_micro_tx_msg()
69 		list_add_tail(&msg->node, &micro->queue);  in ipaq_micro_tx_msg()
70 		spin_unlock_irqrestore(&micro->lock, flags);  in ipaq_micro_tx_msg()
73 	micro->msg = msg;  in ipaq_micro_tx_msg()
74 	ipaq_micro_trigger_tx(micro);  in ipaq_micro_tx_msg()
75 	spin_unlock_irqrestore(&micro->lock, flags);  in ipaq_micro_tx_msg()
80 static void micro_rx_msg(struct ipaq_micro *micro, u8 id, int len, u8 *data)  in micro_rx_msg()  argument
82 	dev_dbg(micro->dev, "RX msg: %02x, %d bytes\n", id, len);  in micro_rx_msg()
84 	spin_lock(&micro->lock);  in micro_rx_msg()
94 		if (micro->msg && micro->msg->id == id) {  in micro_rx_msg()
95 			struct ipaq_micro_msg *msg = micro->msg;  in micro_rx_msg()
99 			complete(&micro->msg->ack);  in micro_rx_msg()
100 			if (!list_empty(&micro->queue)) {  in micro_rx_msg()
101 				micro->msg = list_entry(micro->queue.next,  in micro_rx_msg()
104 				list_del_init(&micro->msg->node);  in micro_rx_msg()
105 				ipaq_micro_trigger_tx(micro);  in micro_rx_msg()
107 				micro->msg = NULL;  in micro_rx_msg()
108 			dev_dbg(micro->dev, "OK RX message 0x%02x\n", id);  in micro_rx_msg()
110 			dev_err(micro->dev,  in micro_rx_msg()
112 			if (!micro->msg)  in micro_rx_msg()
113 				dev_info(micro->dev, "no message queued\n");  in micro_rx_msg()
115 				dev_info(micro->dev, "expected message %02x\n",  in micro_rx_msg()
116 					 micro->msg->id);  in micro_rx_msg()
120 		if (micro->key)  in micro_rx_msg()
121 			micro->key(micro->key_data, len, data);  in micro_rx_msg()
123 			dev_dbg(micro->dev, "key message ignored, no handle\n");  in micro_rx_msg()
126 		if (micro->ts)  in micro_rx_msg()
127 			micro->ts(micro->ts_data, len, data);  in micro_rx_msg()
129 			dev_dbg(micro->dev, "touchscreen message ignored, no handle\n");  in micro_rx_msg()
132 		dev_err(micro->dev,  in micro_rx_msg()
136 	spin_unlock(&micro->lock);  in micro_rx_msg()
139 static void micro_process_char(struct ipaq_micro *micro, u8 ch)  in micro_process_char()  argument
141 	struct ipaq_micro_rxdev *rx = &micro->rx;  in micro_process_char()
163 			micro_rx_msg(micro, rx->id, rx->len, rx->buf);  in micro_process_char()
169 static void micro_rx_chars(struct ipaq_micro *micro)  in micro_rx_chars()  argument
173 	while ((status = readl(micro->base + UTSR1)) & UTSR1_RNE) {  in micro_rx_chars()
174 		ch = readl(micro->base + UTDR);  in micro_rx_chars()
176 			dev_err(micro->dev, "rx: parity error\n");  in micro_rx_chars()
178 			dev_err(micro->dev, "rx: framing error\n");  in micro_rx_chars()
180 			dev_err(micro->dev, "rx: overrun error\n");  in micro_rx_chars()
181 		micro_process_char(micro, ch);  in micro_rx_chars()
185 static void ipaq_micro_get_version(struct ipaq_micro *micro)  in ipaq_micro_get_version()  argument
191 	ipaq_micro_tx_msg_sync(micro, &msg);  in ipaq_micro_get_version()
193 		memcpy(micro->version, msg.rx_data, 4);  in ipaq_micro_get_version()
194 		micro->version[4] = '\0';  in ipaq_micro_get_version()
196 		memcpy(micro->version, msg.rx_data, 4);  in ipaq_micro_get_version()
197 		micro->version[4] = '\0';  in ipaq_micro_get_version()
200 		dev_err(micro->dev,  in ipaq_micro_get_version()
205 static void ipaq_micro_eeprom_read(struct ipaq_micro *micro,  in ipaq_micro_eeprom_read()  argument
217 		ipaq_micro_tx_msg_sync(micro, &msg);  in ipaq_micro_eeprom_read()
237 static void __init ipaq_micro_eeprom_dump(struct ipaq_micro *micro)  in ipaq_micro_eeprom_dump()  argument
242 	ipaq_micro_eeprom_read(micro, 0, 128, dump);  in ipaq_micro_eeprom_dump()
245 		dev_info(micro->dev, "HW version %s\n", str);  in ipaq_micro_eeprom_dump()
250 		dev_info(micro->dev, "serial number: %s\n", str);  in ipaq_micro_eeprom_dump()
257 		dev_info(micro->dev, "module ID: %s\n", str);  in ipaq_micro_eeprom_dump()
262 		dev_info(micro->dev, "product revision: %s\n", str);  in ipaq_micro_eeprom_dump()
265 	dev_info(micro->dev, "product ID: %u\n", ipaq_micro_to_u16(dump+80));  in ipaq_micro_eeprom_dump()
266 	dev_info(micro->dev, "frame rate: %u fps\n",  in ipaq_micro_eeprom_dump()
268 	dev_info(micro->dev, "page mode: %u\n", ipaq_micro_to_u16(dump+84));  in ipaq_micro_eeprom_dump()
269 	dev_info(micro->dev, "country ID: %u\n", ipaq_micro_to_u16(dump+86));  in ipaq_micro_eeprom_dump()
270 	dev_info(micro->dev, "color display: %s\n",  in ipaq_micro_eeprom_dump()
272 	dev_info(micro->dev, "ROM size: %u MiB\n", ipaq_micro_to_u16(dump+90));  in ipaq_micro_eeprom_dump()
273 	dev_info(micro->dev, "RAM size: %u KiB\n", ipaq_micro_to_u16(dump+92));  in ipaq_micro_eeprom_dump()
274 	dev_info(micro->dev, "screen: %u x %u\n",  in ipaq_micro_eeprom_dump()
278 static void micro_tx_chars(struct ipaq_micro *micro)  in micro_tx_chars()  argument
280 	struct ipaq_micro_txdev *tx = &micro->tx;  in micro_tx_chars()
284 	       (readl(micro->base + UTSR1) & UTSR1_TNF)) {  in micro_tx_chars()
285 		writel(tx->buf[tx->index], micro->base + UTDR);  in micro_tx_chars()
290 	val = readl(micro->base + UTCR3);  in micro_tx_chars()
292 	writel(val, micro->base + UTCR3);  in micro_tx_chars()
295 static void micro_reset_comm(struct ipaq_micro *micro)  in micro_reset_comm()  argument
297 	struct ipaq_micro_rxdev *rx = &micro->rx;  in micro_reset_comm()
300 	if (micro->msg)  in micro_reset_comm()
301 		complete(&micro->msg->ack);  in micro_reset_comm()
307 	writel(0x01, micro->sdlc + 0x0); /* Select UART mode */  in micro_reset_comm()
310 	writel(0x0, micro->base + UTCR3);  in micro_reset_comm()
313 	writel(UTCR0_8BitData | UTCR0_1StpBit, micro->base + UTCR0);  in micro_reset_comm()
316 	writel(0x0, micro->base + UTCR1);  in micro_reset_comm()
317 	writel(0x1, micro->base + UTCR2);  in micro_reset_comm()
320 	writel(0xff, micro->base + UTSR0);  in micro_reset_comm()
323 	writel(UTCR3_TXE | UTCR3_RXE | UTCR3_RIE, micro->base + UTCR3);  in micro_reset_comm()
324 	val = readl(micro->base + UTCR3);  in micro_reset_comm()
326 	writel(val, micro->base + UTCR3);  in micro_reset_comm()
331 	struct ipaq_micro *micro = dev_id;  in micro_serial_isr()  local
332 	struct ipaq_micro_txdev *tx = &micro->tx;  in micro_serial_isr()
335 	status = readl(micro->base + UTSR0);  in micro_serial_isr()
340 				writel(UTSR0_RID, micro->base + UTSR0);  in micro_serial_isr()
341 			micro_rx_chars(micro);  in micro_serial_isr()
347 			       micro->base + UTSR0);  in micro_serial_isr()
350 			micro_tx_chars(micro);  in micro_serial_isr()
352 		status = readl(micro->base + UTSR0);  in micro_serial_isr()
361 	{ .name = "ipaq-micro-backlight", },
362 	{ .name = "ipaq-micro-battery", },
363 	{ .name = "ipaq-micro-keys", },
364 	{ .name = "ipaq-micro-ts", },
365 	{ .name = "ipaq-micro-leds", },
370 	struct ipaq_micro *micro = dev_get_drvdata(dev);  in micro_resume()  local
372 	micro_reset_comm(micro);  in micro_resume()
380 	struct ipaq_micro *micro;  in micro_probe()  local
384 	micro = devm_kzalloc(&pdev->dev, sizeof(*micro), GFP_KERNEL);  in micro_probe()
385 	if (!micro)  in micro_probe()
388 	micro->dev = &pdev->dev;  in micro_probe()
390 	micro->base = devm_platform_get_and_ioremap_resource(pdev, 0, NULL);  in micro_probe()
391 	if (IS_ERR(micro->base))  in micro_probe()
392 		return PTR_ERR(micro->base);  in micro_probe()
394 	micro->sdlc = devm_platform_ioremap_resource(pdev, 1);  in micro_probe()
395 	if (IS_ERR(micro->sdlc))  in micro_probe()
396 		return PTR_ERR(micro->sdlc);  in micro_probe()
398 	micro_reset_comm(micro);  in micro_probe()
404 			       IRQF_SHARED, "ipaq-micro",  in micro_probe()
405 			       micro);  in micro_probe()
412 	spin_lock_init(&micro->lock);  in micro_probe()
413 	INIT_LIST_HEAD(&micro->queue);  in micro_probe()
414 	platform_set_drvdata(pdev, micro);  in micro_probe()
424 	ipaq_micro_get_version(micro);  in micro_probe()
425 	dev_info(&pdev->dev, "Atmel micro ASIC version %s\n", micro->version);  in micro_probe()
426 	ipaq_micro_eeprom_dump(micro);  in micro_probe()
437 		.name	= "ipaq-h3xxx-micro",