Adding upstream version 5.10.209.upstream/5.10.209upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 435 insertions, 0 deletions

diff --git a/drivers/sbus/char/uctrl.c b/drivers/sbus/char/uctrl.c
new file mode 100644
index 000000000..05de0ce79
--- /dev/null
+++ b/drivers/sbus/char/uctrl.c
@@ -0,0 +1,435 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/* uctrl.c: TS102 Microcontroller interface on Tadpole Sparcbook 3
+ *
+ * Copyright 1999 Derrick J Brashear (shadow@dementia.org)
+ * Copyright 2008 David S. Miller (davem@davemloft.net)
+ */
+
+#include <linux/module.h>
+#include <linux/errno.h>
+#include <linux/delay.h>
+#include <linux/interrupt.h>
+#include <linux/slab.h>
+#include <linux/mutex.h>
+#include <linux/ioport.h>
+#include <linux/miscdevice.h>
+#include <linux/mm.h>
+#include <linux/of.h>
+#include <linux/of_device.h>
+
+#include <asm/openprom.h>
+#include <asm/oplib.h>
+#include <asm/irq.h>
+#include <asm/io.h>
+
+#define DEBUG 1
+#ifdef DEBUG
+#define dprintk(x) printk x
+#else
+#define dprintk(x)
+#endif
+
+struct uctrl_regs {
+	u32 uctrl_intr;
+	u32 uctrl_data;
+	u32 uctrl_stat;
+	u32 uctrl_xxx[5];
+};
+
+struct ts102_regs {
+	u32 card_a_intr;
+	u32 card_a_stat;
+	u32 card_a_ctrl;
+	u32 card_a_xxx;
+	u32 card_b_intr;
+	u32 card_b_stat;
+	u32 card_b_ctrl;
+	u32 card_b_xxx;
+	u32 uctrl_intr;
+	u32 uctrl_data;
+	u32 uctrl_stat;
+	u32 uctrl_xxx;
+	u32 ts102_xxx[4];
+};
+
+/* Bits for uctrl_intr register */
+#define UCTRL_INTR_TXE_REQ         0x01    /* transmit FIFO empty int req */
+#define UCTRL_INTR_TXNF_REQ        0x02    /* transmit FIFO not full int req */
+#define UCTRL_INTR_RXNE_REQ        0x04    /* receive FIFO not empty int req */
+#define UCTRL_INTR_RXO_REQ         0x08    /* receive FIFO overflow int req */
+#define UCTRL_INTR_TXE_MSK         0x10    /* transmit FIFO empty mask */
+#define UCTRL_INTR_TXNF_MSK        0x20    /* transmit FIFO not full mask */
+#define UCTRL_INTR_RXNE_MSK        0x40    /* receive FIFO not empty mask */
+#define UCTRL_INTR_RXO_MSK         0x80    /* receive FIFO overflow mask */
+
+/* Bits for uctrl_stat register */
+#define UCTRL_STAT_TXE_STA         0x01    /* transmit FIFO empty status */
+#define UCTRL_STAT_TXNF_STA        0x02    /* transmit FIFO not full status */
+#define UCTRL_STAT_RXNE_STA        0x04    /* receive FIFO not empty status */
+#define UCTRL_STAT_RXO_STA         0x08    /* receive FIFO overflow status */
+
+static DEFINE_MUTEX(uctrl_mutex);
+static const char *uctrl_extstatus[16] = {
+        "main power available",
+        "internal battery attached",
+        "external battery attached",
+        "external VGA attached",
+        "external keyboard attached",
+        "external mouse attached",
+        "lid down",
+        "internal battery currently charging",
+        "external battery currently charging",
+        "internal battery currently discharging",
+        "external battery currently discharging",
+};
+
+/* Everything required for one transaction with the uctrl */
+struct uctrl_txn {
+	u8 opcode;
+	u8 inbits;
+	u8 outbits;
+	u8 *inbuf;
+	u8 *outbuf;
+};
+
+struct uctrl_status {
+	u8 current_temp; /* 0x07 */
+	u8 reset_status; /* 0x0b */
+	u16 event_status; /* 0x0c */
+	u16 error_status; /* 0x10 */
+	u16 external_status; /* 0x11, 0x1b */
+	u8 internal_charge; /* 0x18 */
+	u8 external_charge; /* 0x19 */
+	u16 control_lcd; /* 0x20 */
+	u8 control_bitport; /* 0x21 */
+	u8 speaker_volume; /* 0x23 */
+	u8 control_tft_brightness; /* 0x24 */
+	u8 control_kbd_repeat_delay; /* 0x28 */
+	u8 control_kbd_repeat_period; /* 0x29 */
+	u8 control_screen_contrast; /* 0x2F */
+};
+
+enum uctrl_opcode {
+  READ_SERIAL_NUMBER=0x1,
+  READ_ETHERNET_ADDRESS=0x2,
+  READ_HARDWARE_VERSION=0x3,
+  READ_MICROCONTROLLER_VERSION=0x4,
+  READ_MAX_TEMPERATURE=0x5,
+  READ_MIN_TEMPERATURE=0x6,
+  READ_CURRENT_TEMPERATURE=0x7,
+  READ_SYSTEM_VARIANT=0x8,
+  READ_POWERON_CYCLES=0x9,
+  READ_POWERON_SECONDS=0xA,
+  READ_RESET_STATUS=0xB,
+  READ_EVENT_STATUS=0xC,
+  READ_REAL_TIME_CLOCK=0xD,
+  READ_EXTERNAL_VGA_PORT=0xE,
+  READ_MICROCONTROLLER_ROM_CHECKSUM=0xF,
+  READ_ERROR_STATUS=0x10,
+  READ_EXTERNAL_STATUS=0x11,
+  READ_USER_CONFIGURATION_AREA=0x12,
+  READ_MICROCONTROLLER_VOLTAGE=0x13,
+  READ_INTERNAL_BATTERY_VOLTAGE=0x14,
+  READ_DCIN_VOLTAGE=0x15,
+  READ_HORIZONTAL_POINTER_VOLTAGE=0x16,
+  READ_VERTICAL_POINTER_VOLTAGE=0x17,
+  READ_INTERNAL_BATTERY_CHARGE_LEVEL=0x18,
+  READ_EXTERNAL_BATTERY_CHARGE_LEVEL=0x19,
+  READ_REAL_TIME_CLOCK_ALARM=0x1A,
+  READ_EVENT_STATUS_NO_RESET=0x1B,
+  READ_INTERNAL_KEYBOARD_LAYOUT=0x1C,
+  READ_EXTERNAL_KEYBOARD_LAYOUT=0x1D,
+  READ_EEPROM_STATUS=0x1E,
+  CONTROL_LCD=0x20,
+  CONTROL_BITPORT=0x21,
+  SPEAKER_VOLUME=0x23,
+  CONTROL_TFT_BRIGHTNESS=0x24,
+  CONTROL_WATCHDOG=0x25,
+  CONTROL_FACTORY_EEPROM_AREA=0x26,
+  CONTROL_KBD_TIME_UNTIL_REPEAT=0x28,
+  CONTROL_KBD_TIME_BETWEEN_REPEATS=0x29,
+  CONTROL_TIMEZONE=0x2A,
+  CONTROL_MARK_SPACE_RATIO=0x2B,
+  CONTROL_DIAGNOSTIC_MODE=0x2E,
+  CONTROL_SCREEN_CONTRAST=0x2F,
+  RING_BELL=0x30,
+  SET_DIAGNOSTIC_STATUS=0x32,
+  CLEAR_KEY_COMBINATION_TABLE=0x33,
+  PERFORM_SOFTWARE_RESET=0x34,
+  SET_REAL_TIME_CLOCK=0x35,
+  RECALIBRATE_POINTING_STICK=0x36,
+  SET_BELL_FREQUENCY=0x37,
+  SET_INTERNAL_BATTERY_CHARGE_RATE=0x39,
+  SET_EXTERNAL_BATTERY_CHARGE_RATE=0x3A,
+  SET_REAL_TIME_CLOCK_ALARM=0x3B,
+  READ_EEPROM=0x40,
+  WRITE_EEPROM=0x41,
+  WRITE_TO_STATUS_DISPLAY=0x42,
+  DEFINE_SPECIAL_CHARACTER=0x43,
+  DEFINE_KEY_COMBINATION_ENTRY=0x50,
+  DEFINE_STRING_TABLE_ENTRY=0x51,
+  DEFINE_STATUS_SCREEN_DISPLAY=0x52,
+  PERFORM_EMU_COMMANDS=0x64,
+  READ_EMU_REGISTER=0x65,
+  WRITE_EMU_REGISTER=0x66,
+  READ_EMU_RAM=0x67,
+  WRITE_EMU_RAM=0x68,
+  READ_BQ_REGISTER=0x69,
+  WRITE_BQ_REGISTER=0x6A,
+  SET_USER_PASSWORD=0x70,
+  VERIFY_USER_PASSWORD=0x71,
+  GET_SYSTEM_PASSWORD_KEY=0x72,
+  VERIFY_SYSTEM_PASSWORD=0x73,
+  POWER_OFF=0x82,
+  POWER_RESTART=0x83,
+};
+
+static struct uctrl_driver {
+	struct uctrl_regs __iomem *regs;
+	int irq;
+	int pending;
+	struct uctrl_status status;
+} *global_driver;
+
+static void uctrl_get_event_status(struct uctrl_driver *);
+static void uctrl_get_external_status(struct uctrl_driver *);
+
+static long
+uctrl_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
+{
+	switch (cmd) {
+		default:
+			return -EINVAL;
+	}
+	return 0;
+}
+
+static int
+uctrl_open(struct inode *inode, struct file *file)
+{
+	mutex_lock(&uctrl_mutex);
+	uctrl_get_event_status(global_driver);
+	uctrl_get_external_status(global_driver);
+	mutex_unlock(&uctrl_mutex);
+	return 0;
+}
+
+static irqreturn_t uctrl_interrupt(int irq, void *dev_id)
+{
+	return IRQ_HANDLED;
+}
+
+static const struct file_operations uctrl_fops = {
+	.owner =	THIS_MODULE,
+	.llseek =	no_llseek,
+	.unlocked_ioctl =	uctrl_ioctl,
+	.open =		uctrl_open,
+};
+
+static struct miscdevice uctrl_dev = {
+	UCTRL_MINOR,
+	"uctrl",
+	&uctrl_fops
+};
+
+/* Wait for space to write, then write to it */
+#define WRITEUCTLDATA(value) \
+{ \
+  unsigned int i; \
+  for (i = 0; i < 10000; i++) { \
+      if (UCTRL_STAT_TXNF_STA & sbus_readl(&driver->regs->uctrl_stat)) \
+      break; \
+  } \
+  dprintk(("write data 0x%02x\n", value)); \
+  sbus_writel(value, &driver->regs->uctrl_data); \
+}
+
+/* Wait for something to read, read it, then clear the bit */
+#define READUCTLDATA(value) \
+{ \
+  unsigned int i; \
+  value = 0; \
+  for (i = 0; i < 10000; i++) { \
+      if ((UCTRL_STAT_RXNE_STA & sbus_readl(&driver->regs->uctrl_stat)) == 0) \
+      break; \
+    udelay(1); \
+  } \
+  value = sbus_readl(&driver->regs->uctrl_data); \
+  dprintk(("read data 0x%02x\n", value)); \
+  sbus_writel(UCTRL_STAT_RXNE_STA, &driver->regs->uctrl_stat); \
+}
+
+static void uctrl_do_txn(struct uctrl_driver *driver, struct uctrl_txn *txn)
+{
+	int stat, incnt, outcnt, bytecnt, intr;
+	u32 byte;
+
+	stat = sbus_readl(&driver->regs->uctrl_stat);
+	intr = sbus_readl(&driver->regs->uctrl_intr);
+	sbus_writel(stat, &driver->regs->uctrl_stat);
+
+	dprintk(("interrupt stat 0x%x int 0x%x\n", stat, intr));
+
+	incnt = txn->inbits;
+	outcnt = txn->outbits;
+	byte = (txn->opcode << 8);
+	WRITEUCTLDATA(byte);
+
+	bytecnt = 0;
+	while (incnt > 0) {
+		byte = (txn->inbuf[bytecnt] << 8);
+		WRITEUCTLDATA(byte);
+		incnt--;
+		bytecnt++;
+	}
+
+	/* Get the ack */
+	READUCTLDATA(byte);
+	dprintk(("ack was %x\n", (byte >> 8)));
+
+	bytecnt = 0;
+	while (outcnt > 0) {
+		READUCTLDATA(byte);
+		txn->outbuf[bytecnt] = (byte >> 8);
+		dprintk(("set byte to %02x\n", byte));
+		outcnt--;
+		bytecnt++;
+	}
+}
+
+static void uctrl_get_event_status(struct uctrl_driver *driver)
+{
+	struct uctrl_txn txn;
+	u8 outbits[2];
+
+	txn.opcode = READ_EVENT_STATUS;
+	txn.inbits = 0;
+	txn.outbits = 2;
+	txn.inbuf = NULL;
+	txn.outbuf = outbits;
+
+	uctrl_do_txn(driver, &txn);
+
+	dprintk(("bytes %x %x\n", (outbits[0] & 0xff), (outbits[1] & 0xff)));
+	driver->status.event_status = 
+		((outbits[0] & 0xff) << 8) | (outbits[1] & 0xff);
+	dprintk(("ev is %x\n", driver->status.event_status));
+}
+
+static void uctrl_get_external_status(struct uctrl_driver *driver)
+{
+	struct uctrl_txn txn;
+	u8 outbits[2];
+	int i, v;
+
+	txn.opcode = READ_EXTERNAL_STATUS;
+	txn.inbits = 0;
+	txn.outbits = 2;
+	txn.inbuf = NULL;
+	txn.outbuf = outbits;
+
+	uctrl_do_txn(driver, &txn);
+
+	dprintk(("bytes %x %x\n", (outbits[0] & 0xff), (outbits[1] & 0xff)));
+	driver->status.external_status = 
+		((outbits[0] * 256) + (outbits[1]));
+	dprintk(("ex is %x\n", driver->status.external_status));
+	v = driver->status.external_status;
+	for (i = 0; v != 0; i++, v >>= 1) {
+		if (v & 1) {
+			dprintk(("%s%s", " ", uctrl_extstatus[i]));
+		}
+	}
+	dprintk(("\n"));
+	
+}
+
+static int uctrl_probe(struct platform_device *op)
+{
+	struct uctrl_driver *p;
+	int err = -ENOMEM;
+
+	p = kzalloc(sizeof(*p), GFP_KERNEL);
+	if (!p) {
+		printk(KERN_ERR "uctrl: Unable to allocate device struct.\n");
+		goto out;
+	}
+
+	p->regs = of_ioremap(&op->resource[0], 0,
+			     resource_size(&op->resource[0]),
+			     "uctrl");
+	if (!p->regs) {
+		printk(KERN_ERR "uctrl: Unable to map registers.\n");
+		goto out_free;
+	}
+
+	p->irq = op->archdata.irqs[0];
+	err = request_irq(p->irq, uctrl_interrupt, 0, "uctrl", p);
+	if (err) {
+		printk(KERN_ERR "uctrl: Unable to register irq.\n");
+		goto out_iounmap;
+	}
+
+	err = misc_register(&uctrl_dev);
+	if (err) {
+		printk(KERN_ERR "uctrl: Unable to register misc device.\n");
+		goto out_free_irq;
+	}
+
+	sbus_writel(UCTRL_INTR_RXNE_REQ|UCTRL_INTR_RXNE_MSK, &p->regs->uctrl_intr);
+	printk(KERN_INFO "%pOF: uctrl regs[0x%p] (irq %d)\n",
+	       op->dev.of_node, p->regs, p->irq);
+	uctrl_get_event_status(p);
+	uctrl_get_external_status(p);
+
+	dev_set_drvdata(&op->dev, p);
+	global_driver = p;
+
+out:
+	return err;
+
+out_free_irq:
+	free_irq(p->irq, p);
+
+out_iounmap:
+	of_iounmap(&op->resource[0], p->regs, resource_size(&op->resource[0]));
+
+out_free:
+	kfree(p);
+	goto out;
+}
+
+static int uctrl_remove(struct platform_device *op)
+{
+	struct uctrl_driver *p = dev_get_drvdata(&op->dev);
+
+	if (p) {
+		misc_deregister(&uctrl_dev);
+		free_irq(p->irq, p);
+		of_iounmap(&op->resource[0], p->regs, resource_size(&op->resource[0]));
+		kfree(p);
+	}
+	return 0;
+}
+
+static const struct of_device_id uctrl_match[] = {
+	{
+		.name = "uctrl",
+	},
+	{},
+};
+MODULE_DEVICE_TABLE(of, uctrl_match);
+
+static struct platform_driver uctrl_driver = {
+	.driver = {
+		.name = "uctrl",
+		.of_match_table = uctrl_match,
+	},
+	.probe		= uctrl_probe,
+	.remove		= uctrl_remove,
+};
+
+
+module_platform_driver(uctrl_driver);
+
+MODULE_LICENSE("GPL");