media: ddbridge: initial support for MCI-based MaxSX8 cards

This adds initial support for the new MCI-based (micro-code interface)
DD cards, with the first one being the MaxSX8 eight-tuner DVB-S/S2/S2X
PCIe card. The MCI is basically a generalized interface implemented in
the card's FPGA firmware and usable for all kind of cards, without the
need to implement any demod/tuner drivers as this interface "hides" any
I2C interface to the actual ICs, in other words any required driver is
implemented in the card firmware.

At this stage, the MCI interface is quite rudimentary with things like
signal statistics reporting missing, but is already working to serve
DVB streams to DVB applications. Missing functionality will be enabled
over time.

This implements only the ddbridge-mci sub-object and hooks it up to the
Makefile so the object gets build. The upcoming commits hook this module
into all other ddbridge parts where required, including device IDs etc.

Picked up from the upstream dddvb-0.9.33 release.
Signed-off-by: Daniel Scheller <d.scheller@gmx.net>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>

drivers/media/pci/ddbridge/Makefile

@@ -4,7 +4,7 @@
 #
 
 ddbridge-objs := ddbridge-main.o ddbridge-core.o ddbridge-ci.o \
-		ddbridge-hw.o ddbridge-i2c.o ddbridge-max.o
+		ddbridge-hw.o ddbridge-i2c.o ddbridge-max.o ddbridge-mci.o
 
 obj-$(CONFIG_DVB_DDBRIDGE) += ddbridge.o
 

drivers/media/pci/ddbridge/ddbridge-mci.h

+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * ddbridge-mci.h: Digital Devices micro code interface
+ *
+ * Copyright (C) 2017 Digital Devices GmbH
+ *                    Marcus Metzler <mocm@metzlerbros.de>
+ *                    Ralph Metzler <rjkm@metzlerbros.de>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * version 2 only, as published by the Free Software Foundation.
+ *
+ * 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.
+ */
+
+#ifndef _DDBRIDGE_MCI_H_
+#define _DDBRIDGE_MCI_H_
+
+#define MCI_CONTROL                         (0x500)
+#define MCI_COMMAND                         (0x600)
+#define MCI_RESULT                          (0x680)
+
+#define MCI_COMMAND_SIZE                    (0x80)
+#define MCI_RESULT_SIZE                     (0x80)
+
+#define MCI_CONTROL_START_COMMAND           (0x00000001)
+#define MCI_CONTROL_ENABLE_DONE_INTERRUPT   (0x00000002)
+#define MCI_CONTROL_RESET                   (0x00008000)
+#define MCI_CONTROL_READY                   (0x00010000)
+
+#define SX8_TSCONFIG                        (0x280)
+
+#define SX8_TSCONFIG_MODE_MASK              (0x00000003)
+#define SX8_TSCONFIG_MODE_OFF               (0x00000000)
+#define SX8_TSCONFIG_MODE_NORMAL            (0x00000001)
+#define SX8_TSCONFIG_MODE_IQ                (0x00000003)
+
+#define SX8_TSCONFIG_TSHEADER               (0x00000004)
+#define SX8_TSCONFIG_BURST                  (0x00000008)
+
+#define SX8_TSCONFIG_BURSTSIZE_MASK         (0x00000030)
+#define SX8_TSCONFIG_BURSTSIZE_2K           (0x00000000)
+#define SX8_TSCONFIG_BURSTSIZE_4K           (0x00000010)
+#define SX8_TSCONFIG_BURSTSIZE_8K           (0x00000020)
+#define SX8_TSCONFIG_BURSTSIZE_16K          (0x00000030)
+
+#define SX8_DEMOD_STOPPED       (0)
+#define SX8_DEMOD_IQ_MODE       (1)
+#define SX8_DEMOD_WAIT_SIGNAL   (2)
+#define SX8_DEMOD_WAIT_MATYPE   (3)
+#define SX8_DEMOD_TIMEOUT       (14)
+#define SX8_DEMOD_LOCKED        (15)
+
+#define MCI_CMD_STOP            (0x01)
+#define MCI_CMD_GETSTATUS       (0x02)
+#define MCI_CMD_GETSIGNALINFO   (0x03)
+#define MCI_CMD_RFPOWER         (0x04)
+
+#define MCI_CMD_SEARCH_DVBS     (0x10)
+
+#define MCI_CMD_GET_IQSYMBOL    (0x30)
+
+#define SX8_CMD_INPUT_ENABLE    (0x40)
+#define SX8_CMD_INPUT_DISABLE   (0x41)
+#define SX8_CMD_START_IQ        (0x42)
+#define SX8_CMD_STOP_IQ         (0x43)
+#define SX8_CMD_SELECT_IQOUT    (0x44)
+#define SX8_CMD_SELECT_TSOUT    (0x45)
+
+#define SX8_ERROR_UNSUPPORTED   (0x80)
+
+#define SX8_SUCCESS(status)     (status < SX8_ERROR_UNSUPPORTED)
+
+#define SX8_CMD_DIAG_READ8      (0xE0)
+#define SX8_CMD_DIAG_READ32     (0xE1)
+#define SX8_CMD_DIAG_WRITE8     (0xE2)
+#define SX8_CMD_DIAG_WRITE32    (0xE3)
+
+#define SX8_CMD_DIAG_READRF     (0xE8)
+#define SX8_CMD_DIAG_WRITERF    (0xE9)
+
+struct mci_command {
+	union {
+		u32 command_word;
+		struct {
+			u8 command;
+			u8 tuner;
+			u8 demod;
+			u8 output;
+		};
+	};
+	union {
+		u32 params[31];
+		struct {
+			u8  flags;
+			u8  s2_modulation_mask;
+			u8  rsvd1;
+			u8  retry;
+			u32 frequency;
+			u32 symbol_rate;
+			u8  input_stream_id;
+			u8  rsvd2[3];
+			u32 scrambling_sequence_index;
+		} dvbs2_search;
+	};
+};
+
+struct mci_result {
+	union {
+		u32 status_word;
+		struct {
+			u8 status;
+			u8 rsvd;
+			u16 time;
+		};
+	};
+	union {
+		u32 result[27];
+		struct {
+			u8  standard;
+			/* puncture rate for DVB-S */
+			u8  pls_code;
+			/* 7-6: rolloff, 5-2: rsrvd, 1:short, 0:pilots */
+			u8  roll_off;
+			u8  rsvd;
+			u32 frequency;
+			u32 symbol_rate;
+			s16 channel_power;
+			s16 band_power;
+			s16 signal_to_noise;
+			s16 rsvd2;
+			u32 packet_errors;
+			u32 ber_numerator;
+			u32 ber_denominator;
+		} dvbs2_signal_info;
+		struct {
+			u8 i_symbol;
+			u8 q_symbol;
+		} dvbs2_signal_iq;
+	};
+	u32 version[4];
+};
+
+struct dvb_frontend
+*ddb_mci_attach(struct ddb_input *input,
+		int mci_type, int nr,
+		int (**fn_set_input)(struct dvb_frontend *, int));
+
+#endif /* _DDBRIDGE_MCI_H_ */