projects / linux-2.6-block.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 | |
| a056bef4 | 49 | #ifdef CONFIG_PXA_SSP_LEGACY |
| b216c018 LG |
50 | /* |
| 51 | * SSP initialisation flags | |
| 52 | */ | |
| 53 | #define SSP_NO_IRQ 0x1 /* don't register an irq handler in SSP driver */ | |
| 54 | ||
| 1da177e4 LT |
55 | struct ssp_state { |
| 56 | u32 cr0; | |
| 57 | u32 cr1; | |
| 58 | u32 to; | |
| 59 | u32 psp; | |
| 60 | }; | |
| 61 | ||
| 62 | struct ssp_dev { | |
| 88286450 | 63 | struct ssp_device *ssp; |
| 1da177e4 LT |
64 | u32 port; |
| 65 | u32 mode; | |
| 66 | u32 flags; | |
| 67 | u32 psp_flags; | |
| 68 | u32 speed; | |
| b216c018 | 69 | int irq; |
| 1da177e4 LT |
70 | }; |
| 71 | ||
| 72 | int ssp_write_word(struct ssp_dev *dev, u32 data); | |
| 8f1bf874 PS |
73 | int ssp_read_word(struct ssp_dev *dev, u32 *data); |
| 74 | int ssp_flush(struct ssp_dev *dev); | |
| 1da177e4 LT |
75 | void ssp_enable(struct ssp_dev *dev); |
| 76 | void ssp_disable(struct ssp_dev *dev); | |
| 77 | void ssp_save_state(struct ssp_dev *dev, struct ssp_state *ssp); | |
| 78 | void ssp_restore_state(struct ssp_dev *dev, struct ssp_state *ssp); | |
| b216c018 | 79 | int ssp_init(struct ssp_dev *dev, u32 port, u32 init_flags); |
| 1da177e4 LT |
80 | int ssp_config(struct ssp_dev *dev, u32 mode, u32 flags, u32 psp_flags, u32 speed); |
| 81 | void ssp_exit(struct ssp_dev *dev); | |
| a056bef4 | 82 | #endif /* CONFIG_PXA_SSP_LEGACY */ |
| 1da177e4 | 83 | |
| 63bef547 MB |
84 | /** |
| 85 | * ssp_write_reg - Write to a SSP register | |
| 86 | * | |
| 87 | * @dev: SSP device to access | |
| 88 | * @reg: Register to write to | |
| 89 | * @val: Value to be written. | |
| 90 | */ | |
| 91 | static inline void ssp_write_reg(struct ssp_device *dev, u32 reg, u32 val) | |
| 92 | { | |
| 93 | __raw_writel(val, dev->mmio_base + reg); | |
| 94 | } | |
| 95 | ||
| 96 | /** | |
| 97 | * ssp_read_reg - Read from a SSP register | |
| 98 | * | |
| 99 | * @dev: SSP device to access | |
| 100 | * @reg: Register to read from | |
| 101 | */ | |
| 102 | static inline u32 ssp_read_reg(struct ssp_device *dev, u32 reg) | |
| 103 | { | |
| 104 | return __raw_readl(dev->mmio_base + reg); | |
| 105 | } | |
| 106 | ||
| 88286450 | 107 | struct ssp_device *ssp_request(int port, const char *label); |
| 108 | void ssp_free(struct ssp_device *); | |
| 109 | #endif /* __ASM_ARCH_SSP_H */ |