Adding upstream version 4.19.249.upstream/4.19.249

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

1 files changed, 150 insertions, 0 deletions

diff --git a/drivers/media/pci/solo6x10/solo6x10-eeprom.c b/drivers/media/pci/solo6x10/solo6x10-eeprom.c
new file mode 100644
index 000000000..8e81186dc
--- /dev/null
+++ b/drivers/media/pci/solo6x10/solo6x10-eeprom.c
@@ -0,0 +1,150 @@
+/*
+ * Copyright (C) 2010-2013 Bluecherry, LLC <http://www.bluecherrydvr.com>
+ *
+ * Original author:
+ * Ben Collins <bcollins@ubuntu.com>
+ *
+ * Additional work by:
+ * John Brooks <john.brooks@bluecherry.net>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ */
+
+#include <linux/kernel.h>
+#include <linux/delay.h>
+
+#include "solo6x10.h"
+
+/* Control */
+#define EE_SHIFT_CLK	0x04
+#define EE_CS		0x08
+#define EE_DATA_WRITE	0x02
+#define EE_DATA_READ	0x01
+#define EE_ENB		(0x80 | EE_CS)
+
+#define eeprom_delay()	udelay(100)
+#if 0
+#define eeprom_delay()	solo_reg_read(solo_dev, SOLO_EEPROM_CTRL)
+#define eeprom_delay()	({				\
+	int i, ret;					\
+	udelay(100);					\
+	for (i = ret = 0; i < 1000 && !ret; i++)	\
+		ret = solo_eeprom_reg_read(solo_dev);	\
+})
+#endif
+#define ADDR_LEN	6
+
+/* Commands */
+#define EE_EWEN_CMD	4
+#define EE_EWDS_CMD	4
+#define EE_WRITE_CMD	5
+#define EE_READ_CMD	6
+#define EE_ERASE_CMD	7
+
+static unsigned int solo_eeprom_reg_read(struct solo_dev *solo_dev)
+{
+	return solo_reg_read(solo_dev, SOLO_EEPROM_CTRL) & EE_DATA_READ;
+}
+
+static void solo_eeprom_reg_write(struct solo_dev *solo_dev, u32 data)
+{
+	solo_reg_write(solo_dev, SOLO_EEPROM_CTRL, data);
+	eeprom_delay();
+}
+
+static void solo_eeprom_cmd(struct solo_dev *solo_dev, int cmd)
+{
+	int i;
+
+	solo_eeprom_reg_write(solo_dev, SOLO_EEPROM_ACCESS_EN);
+	solo_eeprom_reg_write(solo_dev, SOLO_EEPROM_ENABLE);
+
+	for (i = 4 + ADDR_LEN; i >= 0; i--) {
+		int dataval = (cmd & (1 << i)) ? EE_DATA_WRITE : 0;
+
+		solo_eeprom_reg_write(solo_dev, SOLO_EEPROM_ENABLE | dataval);
+		solo_eeprom_reg_write(solo_dev, SOLO_EEPROM_ENABLE |
+				      EE_SHIFT_CLK | dataval);
+	}
+
+	solo_eeprom_reg_write(solo_dev, SOLO_EEPROM_ENABLE);
+}
+
+unsigned int solo_eeprom_ewen(struct solo_dev *solo_dev, int w_en)
+{
+	int ewen_cmd = (w_en ? 0x3f : 0) | (EE_EWEN_CMD << ADDR_LEN);
+	unsigned int retval = 0;
+	int i;
+
+	solo_eeprom_cmd(solo_dev, ewen_cmd);
+
+	for (i = 0; i < 16; i++) {
+		solo_eeprom_reg_write(solo_dev, SOLO_EEPROM_ENABLE |
+				      EE_SHIFT_CLK);
+		retval = (retval << 1) | solo_eeprom_reg_read(solo_dev);
+		solo_eeprom_reg_write(solo_dev, SOLO_EEPROM_ENABLE);
+		retval = (retval << 1) | solo_eeprom_reg_read(solo_dev);
+	}
+
+	solo_eeprom_reg_write(solo_dev, ~EE_CS);
+	retval = (retval << 1) | solo_eeprom_reg_read(solo_dev);
+
+	return retval;
+}
+
+__be16 solo_eeprom_read(struct solo_dev *solo_dev, int loc)
+{
+	int read_cmd = loc | (EE_READ_CMD << ADDR_LEN);
+	u16 retval = 0;
+	int i;
+
+	solo_eeprom_cmd(solo_dev, read_cmd);
+
+	for (i = 0; i < 16; i++) {
+		solo_eeprom_reg_write(solo_dev, SOLO_EEPROM_ENABLE |
+				      EE_SHIFT_CLK);
+		retval = (retval << 1) | solo_eeprom_reg_read(solo_dev);
+		solo_eeprom_reg_write(solo_dev, SOLO_EEPROM_ENABLE);
+	}
+
+	solo_eeprom_reg_write(solo_dev, ~EE_CS);
+
+	return (__force __be16)retval;
+}
+
+int solo_eeprom_write(struct solo_dev *solo_dev, int loc,
+		      __be16 data)
+{
+	int write_cmd = loc | (EE_WRITE_CMD << ADDR_LEN);
+	unsigned int retval;
+	int i;
+
+	solo_eeprom_cmd(solo_dev, write_cmd);
+
+	for (i = 15; i >= 0; i--) {
+		unsigned int dataval = ((__force unsigned)data >> i) & 1;
+
+		solo_eeprom_reg_write(solo_dev, EE_ENB);
+		solo_eeprom_reg_write(solo_dev,
+				      EE_ENB | (dataval << 1) | EE_SHIFT_CLK);
+	}
+
+	solo_eeprom_reg_write(solo_dev, EE_ENB);
+	solo_eeprom_reg_write(solo_dev, ~EE_CS);
+	solo_eeprom_reg_write(solo_dev, EE_ENB);
+
+	for (i = retval = 0; i < 10000 && !retval; i++)
+		retval = solo_eeprom_reg_read(solo_dev);
+
+	solo_eeprom_reg_write(solo_dev, ~EE_CS);
+
+	return !retval;
+}