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path: root/drivers/media/pci/cx23885/netup-eeprom.c
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Diffstat (limited to 'drivers/media/pci/cx23885/netup-eeprom.c')
-rw-r--r--drivers/media/pci/cx23885/netup-eeprom.c93
1 files changed, 93 insertions, 0 deletions
diff --git a/drivers/media/pci/cx23885/netup-eeprom.c b/drivers/media/pci/cx23885/netup-eeprom.c
new file mode 100644
index 000000000..26dd5b388
--- /dev/null
+++ b/drivers/media/pci/cx23885/netup-eeprom.c
@@ -0,0 +1,93 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+/*
+ * netup-eeprom.c
+ *
+ * 24LC02 EEPROM driver in conjunction with NetUP Dual DVB-S2 CI card
+ *
+ * Copyright (C) 2009 NetUP Inc.
+ * Copyright (C) 2009 Abylay Ospan <aospan@netup.ru>
+ */
+
+#
+#include "cx23885.h"
+#include "netup-eeprom.h"
+
+#define EEPROM_I2C_ADDR 0x50
+
+int netup_eeprom_read(struct i2c_adapter *i2c_adap, u8 addr)
+{
+ int ret;
+ unsigned char buf[2];
+
+ /* Read from EEPROM */
+ struct i2c_msg msg[] = {
+ {
+ .addr = EEPROM_I2C_ADDR,
+ .flags = 0,
+ .buf = &buf[0],
+ .len = 1
+ }, {
+ .addr = EEPROM_I2C_ADDR,
+ .flags = I2C_M_RD,
+ .buf = &buf[1],
+ .len = 1
+ }
+
+ };
+
+ buf[0] = addr;
+ buf[1] = 0x0;
+
+ ret = i2c_transfer(i2c_adap, msg, 2);
+
+ if (ret != 2) {
+ pr_err("eeprom i2c read error, status=%d\n", ret);
+ return -1;
+ }
+
+ return buf[1];
+};
+
+int netup_eeprom_write(struct i2c_adapter *i2c_adap, u8 addr, u8 data)
+{
+ int ret;
+ unsigned char bufw[2];
+
+ /* Write into EEPROM */
+ struct i2c_msg msg[] = {
+ {
+ .addr = EEPROM_I2C_ADDR,
+ .flags = 0,
+ .buf = &bufw[0],
+ .len = 2
+ }
+ };
+
+ bufw[0] = addr;
+ bufw[1] = data;
+
+ ret = i2c_transfer(i2c_adap, msg, 1);
+
+ if (ret != 1) {
+ pr_err("eeprom i2c write error, status=%d\n", ret);
+ return -1;
+ }
+
+ mdelay(10); /* prophylactic delay, datasheet write cycle time = 5 ms */
+ return 0;
+};
+
+void netup_get_card_info(struct i2c_adapter *i2c_adap,
+ struct netup_card_info *cinfo)
+{
+ int i, j;
+
+ cinfo->rev = netup_eeprom_read(i2c_adap, 63);
+
+ for (i = 64, j = 0; i < 70; i++, j++)
+ cinfo->port[0].mac[j] = netup_eeprom_read(i2c_adap, i);
+
+ for (i = 70, j = 0; i < 76; i++, j++)
+ cinfo->port[1].mac[j] = netup_eeprom_read(i2c_adap, i);
+};