projects / thirdparty / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| 2874c5fd | 1 | /* SPDX-License-Identifier: GPL-2.0-or-later */ |
| b36ece83 MH |
2 | /* |
| 3 | * Freescale SPI/eSPI controller driver library. | |
| 4 | * | |
| 5 | * Maintainer: Kumar Gala | |
| 6 | * | |
| 7 | * Copyright 2010 Freescale Semiconductor, Inc. | |
| 8 | * Copyright (C) 2006 Polycom, Inc. | |
| 9 | * | |
| 10 | * CPM SPI and QE buffer descriptors mode support: | |
| 11 | * Copyright (c) 2009 MontaVista Software, Inc. | |
| 12 | * Author: Anton Vorontsov <avorontsov@ru.mvista.com> | |
| b36ece83 MH |
13 | */ |
| 14 | #ifndef __SPI_FSL_LIB_H__ | |
| 15 | #define __SPI_FSL_LIB_H__ | |
| 16 | ||
| ef6510ba KG |
17 | #include <asm/io.h> |
| 18 | ||
| b36ece83 MH |
19 | /* SPI/eSPI Controller driver's private data. */ |
| 20 | struct mpc8xxx_spi { | |
| 21 | struct device *dev; | |
| 46afd38b | 22 | void __iomem *reg_base; |
| b36ece83 MH |
23 | |
| 24 | /* rx & tx bufs from the spi_transfer */ | |
| 25 | const void *tx; | |
| 26 | void *rx; | |
| 27 | ||
| 28 | int subblock; | |
| 29 | struct spi_pram __iomem *pram; | |
| e8beacbb | 30 | #ifdef CONFIG_FSL_SOC |
| b36ece83 MH |
31 | struct cpm_buf_desc __iomem *tx_bd; |
| 32 | struct cpm_buf_desc __iomem *rx_bd; | |
| e8beacbb | 33 | #endif |
| b36ece83 MH |
34 | |
| 35 | struct spi_transfer *xfer_in_progress; | |
| 36 | ||
| 37 | /* dma addresses for CPM transfers */ | |
| 38 | dma_addr_t tx_dma; | |
| 39 | dma_addr_t rx_dma; | |
| 40 | bool map_tx_dma; | |
| 41 | bool map_rx_dma; | |
| 42 | ||
| 43 | dma_addr_t dma_dummy_tx; | |
| 44 | dma_addr_t dma_dummy_rx; | |
| 45 | ||
| 46 | /* functions to deal with different sized buffers */ | |
| 47 | void (*get_rx) (u32 rx_data, struct mpc8xxx_spi *); | |
| 48 | u32(*get_tx) (struct mpc8xxx_spi *); | |
| 49 | ||
| b36ece83 MH |
50 | unsigned int count; |
| 51 | unsigned int irq; | |
| 52 | ||
| 53 | unsigned nsecs; /* (clock cycle time)/2 */ | |
| 54 | ||
| 55 | u32 spibrg; /* SPIBRG input clock */ | |
| 56 | u32 rx_shift; /* RX data reg shift when in qe mode */ | |
| 57 | u32 tx_shift; /* TX data reg shift when in qe mode */ | |
| 58 | ||
| 59 | unsigned int flags; | |
| 60 | ||
| 38455d7a | 61 | #if IS_ENABLED(CONFIG_SPI_FSL_SPI) |
| c3f3e771 | 62 | int type; |
| 76a7498f | 63 | int native_chipselects; |
| 8922a366 | 64 | u8 max_bits_per_word; |
| c3f3e771 | 65 | |
| b48c4e3c AL |
66 | void (*set_shifts)(u32 *rx_shift, u32 *tx_shift, |
| 67 | int bits_per_word, int msb_first); | |
| 68 | #endif | |
| 69 | ||
| b36ece83 MH |
70 | struct completion done; |
| 71 | }; | |
| 72 | ||
| 73 | struct spi_mpc8xxx_cs { | |
| 74 | /* functions to deal with different sized buffers */ | |
| 75 | void (*get_rx) (u32 rx_data, struct mpc8xxx_spi *); | |
| 76 | u32 (*get_tx) (struct mpc8xxx_spi *); | |
| 77 | u32 rx_shift; /* RX data reg shift when in qe mode */ | |
| 78 | u32 tx_shift; /* TX data reg shift when in qe mode */ | |
| 79 | u32 hw_mode; /* Holds HW mode register settings */ | |
| 80 | }; | |
| 81 | ||
| 82 | static inline void mpc8xxx_spi_write_reg(__be32 __iomem *reg, u32 val) | |
| 83 | { | |
| e8beacbb | 84 | iowrite32be(val, reg); |
| b36ece83 MH |
85 | } |
| 86 | ||
| 87 | static inline u32 mpc8xxx_spi_read_reg(__be32 __iomem *reg) | |
| 88 | { | |
| e8beacbb | 89 | return ioread32be(reg); |
| b36ece83 MH |
90 | } |
| 91 | ||
| 92 | struct mpc8xxx_spi_probe_info { | |
| 93 | struct fsl_spi_platform_data pdata; | |
| 69b921ac | 94 | __be32 __iomem *immr_spi_cs; |
| b36ece83 MH |
95 | }; |
| 96 | ||
| 97 | extern u32 mpc8xxx_spi_tx_buf_u8(struct mpc8xxx_spi *mpc8xxx_spi); | |
| 98 | extern u32 mpc8xxx_spi_tx_buf_u16(struct mpc8xxx_spi *mpc8xxx_spi); | |
| 99 | extern u32 mpc8xxx_spi_tx_buf_u32(struct mpc8xxx_spi *mpc8xxx_spi); | |
| 100 | extern void mpc8xxx_spi_rx_buf_u8(u32 data, struct mpc8xxx_spi *mpc8xxx_spi); | |
| 101 | extern void mpc8xxx_spi_rx_buf_u16(u32 data, struct mpc8xxx_spi *mpc8xxx_spi); | |
| 102 | extern void mpc8xxx_spi_rx_buf_u32(u32 data, struct mpc8xxx_spi *mpc8xxx_spi); | |
| 103 | ||
| 104 | extern struct mpc8xxx_spi_probe_info *to_of_pinfo( | |
| 105 | struct fsl_spi_platform_data *pdata); | |
| 106 | extern int mpc8xxx_spi_bufs(struct mpc8xxx_spi *mspi, | |
| 107 | struct spi_transfer *t, unsigned int len); | |
| b36ece83 | 108 | extern const char *mpc8xxx_spi_strmode(unsigned int flags); |
| c592becb | 109 | extern void mpc8xxx_spi_probe(struct device *dev, struct resource *mem, |
| b36ece83 MH |
110 | unsigned int irq); |
| 111 | extern int mpc8xxx_spi_remove(struct device *dev); | |
| 18d306d1 | 112 | extern int of_mpc8xxx_spi_probe(struct platform_device *ofdev); |
| b36ece83 MH |
113 | |
| 114 | #endif /* __SPI_FSL_LIB_H__ */ |