diff options
Diffstat (limited to 'drivers/media/pci/pt3/pt3.h')
| -rw-r--r-- | drivers/media/pci/pt3/pt3.h | 177 |
1 files changed, 177 insertions, 0 deletions
diff --git a/drivers/media/pci/pt3/pt3.h b/drivers/media/pci/pt3/pt3.h new file mode 100644 index 000000000..a53124438 --- /dev/null +++ b/drivers/media/pci/pt3/pt3.h @@ -0,0 +1,177 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * Earthsoft PT3 driver + * + * Copyright (C) 2014 Akihiro Tsukada <tskd08@gmail.com> + */ + +#ifndef PT3_H +#define PT3_H + +#include <linux/atomic.h> +#include <linux/types.h> + +#include <media/dvb_demux.h> +#include <media/dvb_frontend.h> +#include <media/dmxdev.h> + +#include "tc90522.h" +#include "mxl301rf.h" +#include "qm1d1c0042.h" + +#define DRV_NAME KBUILD_MODNAME + +#define PT3_NUM_FE 4 + +/* + * register index of the FPGA chip + */ +#define REG_VERSION 0x00 +#define REG_BUS 0x04 +#define REG_SYSTEM_W 0x08 +#define REG_SYSTEM_R 0x0c +#define REG_I2C_W 0x10 +#define REG_I2C_R 0x14 +#define REG_RAM_W 0x18 +#define REG_RAM_R 0x1c +#define REG_DMA_BASE 0x40 /* regs for FE[i] = REG_DMA_BASE + 0x18 * i */ +#define OFST_DMA_DESC_L 0x00 +#define OFST_DMA_DESC_H 0x04 +#define OFST_DMA_CTL 0x08 +#define OFST_TS_CTL 0x0c +#define OFST_STATUS 0x10 +#define OFST_TS_ERR 0x14 + +/* + * internal buffer for I2C + */ +#define PT3_I2C_MAX 4091 +struct pt3_i2cbuf { + u8 data[PT3_I2C_MAX]; + u8 tmp; + u32 num_cmds; +}; + +/* + * DMA things + */ +#define TS_PACKET_SZ 188 +/* DMA transfers must not cross 4GiB, so use one page / transfer */ +#define DATA_XFER_SZ 4096 +#define DATA_BUF_XFERS 47 +/* (num_bufs * DATA_BUF_SZ) % TS_PACKET_SZ must be 0 */ +#define DATA_BUF_SZ (DATA_BUF_XFERS * DATA_XFER_SZ) +#define MAX_DATA_BUFS 16 +#define MIN_DATA_BUFS 2 + +#define DESCS_IN_PAGE (PAGE_SIZE / sizeof(struct xfer_desc)) +#define MAX_NUM_XFERS (MAX_DATA_BUFS * DATA_BUF_XFERS) +#define MAX_DESC_BUFS DIV_ROUND_UP(MAX_NUM_XFERS, DESCS_IN_PAGE) + +/* DMA transfer description. + * device is passed a pointer to this struct, dma-reads it, + * and gets the DMA buffer ring for storing TS data. + */ +struct xfer_desc { + u32 addr_l; /* bus address of target data buffer */ + u32 addr_h; + u32 size; + u32 next_l; /* bus address of the next xfer_desc */ + u32 next_h; +}; + +/* A DMA mapping of a page containing xfer_desc's */ +struct xfer_desc_buffer { + dma_addr_t b_addr; + struct xfer_desc *descs; /* PAGE_SIZE (xfer_desc[DESCS_IN_PAGE]) */ +}; + +/* A DMA mapping of a data buffer */ +struct dma_data_buffer { + dma_addr_t b_addr; + u8 *data; /* size: u8[PAGE_SIZE] */ +}; + +/* + * device things + */ +struct pt3_adap_config { + struct i2c_board_info demod_info; + struct tc90522_config demod_cfg; + + struct i2c_board_info tuner_info; + union tuner_config { + struct qm1d1c0042_config qm1d1c0042; + struct mxl301rf_config mxl301rf; + } tuner_cfg; + u32 init_freq; +}; + +struct pt3_adapter { + struct dvb_adapter dvb_adap; /* dvb_adap.priv => struct pt3_board */ + int adap_idx; + + struct dvb_demux demux; + struct dmxdev dmxdev; + struct dvb_frontend *fe; + struct i2c_client *i2c_demod; + struct i2c_client *i2c_tuner; + + /* data fetch thread */ + struct task_struct *thread; + int num_feeds; + + bool cur_lna; + bool cur_lnb; /* current LNB power status (on/off) */ + + /* items below are for DMA */ + struct dma_data_buffer buffer[MAX_DATA_BUFS]; + int buf_idx; + int buf_ofs; + int num_bufs; /* == pt3_board->num_bufs */ + int num_discard; /* how many access units to discard initially */ + + struct xfer_desc_buffer desc_buf[MAX_DESC_BUFS]; + int num_desc_bufs; /* == num_bufs * DATA_BUF_XFERS / DESCS_IN_PAGE */ +}; + + +struct pt3_board { + struct pci_dev *pdev; + void __iomem *regs[2]; + /* regs[0]: registers, regs[1]: internal memory, used for I2C */ + + struct mutex lock; + + /* LNB power shared among sat-FEs */ + int lnb_on_cnt; /* LNB power on count */ + + /* LNA shared among terr-FEs */ + int lna_on_cnt; /* booster enabled count */ + + int num_bufs; /* number of DMA buffers allocated/mapped per FE */ + + struct i2c_adapter i2c_adap; + struct pt3_i2cbuf *i2c_buf; + + struct pt3_adapter *adaps[PT3_NUM_FE]; +}; + + +/* + * prototypes + */ +extern int pt3_alloc_dmabuf(struct pt3_adapter *adap); +extern void pt3_init_dmabuf(struct pt3_adapter *adap); +extern void pt3_free_dmabuf(struct pt3_adapter *adap); +extern int pt3_start_dma(struct pt3_adapter *adap); +extern int pt3_stop_dma(struct pt3_adapter *adap); +extern int pt3_proc_dma(struct pt3_adapter *adap); + +extern int pt3_i2c_master_xfer(struct i2c_adapter *adap, + struct i2c_msg *msgs, int num); +extern u32 pt3_i2c_functionality(struct i2c_adapter *adap); +extern void pt3_i2c_reset(struct pt3_board *pt3); +extern int pt3_init_all_demods(struct pt3_board *pt3); +extern int pt3_init_all_mxl301rf(struct pt3_board *pt3); +#endif /* PT3_H */ |