projects / mirror_ubuntu-focal-kernel.git / blame
| Commit | Line | Data |
|---|---|---|
| 1da177e4 LT |
1 | /* |
| 2 | * ssp.h | |
| 3 | * | |
| 4 | * Copyright (C) 2003 Russell King, All Rights Reserved. | |
| 5 | * | |
| 6 | * This program is free software; you can redistribute it and/or modify | |
| 7 | * it under the terms of the GNU General Public License version 2 as | |
| 8 | * published by the Free Software Foundation. | |
| 9 | * | |
| 10 | * This driver supports the following PXA CPU/SSP ports:- | |
| 11 | * | |
| 12 | * PXA250 SSP | |
| 13 | * PXA255 SSP, NSSP | |
| 14 | * PXA26x SSP, NSSP, ASSP | |
| 15 | * PXA27x SSP1, SSP2, SSP3 | |
| 88286450 | 16 | * PXA3xx SSP1, SSP2, SSP3, SSP4 |
| 1da177e4 LT |
17 | */ |
| 18 | ||
| 88286450 | 19 | #ifndef __ASM_ARCH_SSP_H |
| 20 | #define __ASM_ARCH_SSP_H | |
| 21 | ||
| 22 | #include <linux/list.h> | |
| 63bef547 | 23 | #include <linux/io.h> |
| 88286450 | 24 | |
| 25 | enum pxa_ssp_type { | |
| 26 | SSP_UNDEFINED = 0, | |
| 27 | PXA25x_SSP, /* pxa 210, 250, 255, 26x */ | |
| 28 | PXA25x_NSSP, /* pxa 255, 26x (including ASSP) */ | |
| 29 | PXA27x_SSP, | |
| 30 | }; | |
| 31 | ||
| 32 | struct ssp_device { | |
| 33 | struct platform_device *pdev; | |
| 34 | struct list_head node; | |
| 35 | ||
| 36 | struct clk *clk; | |
| 37 | void __iomem *mmio_base; | |
| 38 | unsigned long phys_base; | |
| 39 | ||
| 40 | const char *label; | |
| 41 | int port_id; | |
| 42 | int type; | |
| 43 | int use_count; | |
| 44 | int irq; | |
| 45 | int drcmr_rx; | |
| 46 | int drcmr_tx; | |
| 47 | }; | |
| 1da177e4 | 48 | |
| 63bef547 MB |
49 | /** |
| 50 | * ssp_write_reg - Write to a SSP register | |
| 51 | * | |
| 52 | * @dev: SSP device to access | |
| 53 | * @reg: Register to write to | |
| 54 | * @val: Value to be written. | |
| 55 | */ | |
| 56 | static inline void ssp_write_reg(struct ssp_device *dev, u32 reg, u32 val) | |
| 57 | { | |
| 58 | __raw_writel(val, dev->mmio_base + reg); | |
| 59 | } | |
| 60 | ||
| 61 | /** | |
| 62 | * ssp_read_reg - Read from a SSP register | |
| 63 | * | |
| 64 | * @dev: SSP device to access | |
| 65 | * @reg: Register to read from | |
| 66 | */ | |
| 67 | static inline u32 ssp_read_reg(struct ssp_device *dev, u32 reg) | |
| 68 | { | |
| 69 | return __raw_readl(dev->mmio_base + reg); | |
| 70 | } | |
| 71 | ||
| 88286450 | 72 | struct ssp_device *ssp_request(int port, const char *label); |
| 73 | void ssp_free(struct ssp_device *); | |
| 74 | #endif /* __ASM_ARCH_SSP_H */ |