| /* |
| * ssp.h |
| * |
| * Copyright (C) 2003 Russell King, All Rights Reserved. |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License version 2 as |
| * published by the Free Software Foundation. |
| * |
| * This driver supports the following PXA CPU/SSP ports:- |
| * |
| * PXA250 SSP |
| * PXA255 SSP, NSSP |
| * PXA26x SSP, NSSP, ASSP |
| * PXA27x SSP1, SSP2, SSP3 |
| * PXA3xx SSP1, SSP2, SSP3, SSP4 |
| */ |
| |
| #ifndef __ASM_ARCH_SSP_H |
| #define __ASM_ARCH_SSP_H |
| |
| #include <linux/list.h> |
| #include <linux/io.h> |
| |
| enum pxa_ssp_type { |
| SSP_UNDEFINED = 0, |
| PXA25x_SSP, /* pxa 210, 250, 255, 26x */ |
| PXA25x_NSSP, /* pxa 255, 26x (including ASSP) */ |
| PXA27x_SSP, |
| }; |
| |
| struct ssp_device { |
| struct platform_device *pdev; |
| struct list_head node; |
| |
| struct clk *clk; |
| void __iomem *mmio_base; |
| unsigned long phys_base; |
| |
| const char *label; |
| int port_id; |
| int type; |
| int use_count; |
| int irq; |
| int drcmr_rx; |
| int drcmr_tx; |
| }; |
| |
| /* |
| * SSP initialisation flags |
| */ |
| #define SSP_NO_IRQ 0x1 /* don't register an irq handler in SSP driver */ |
| |
| struct ssp_state { |
| u32 cr0; |
| u32 cr1; |
| u32 to; |
| u32 psp; |
| }; |
| |
| struct ssp_dev { |
| struct ssp_device *ssp; |
| u32 port; |
| u32 mode; |
| u32 flags; |
| u32 psp_flags; |
| u32 speed; |
| int irq; |
| }; |
| |
| int ssp_write_word(struct ssp_dev *dev, u32 data); |
| int ssp_read_word(struct ssp_dev *dev, u32 *data); |
| int ssp_flush(struct ssp_dev *dev); |
| void ssp_enable(struct ssp_dev *dev); |
| void ssp_disable(struct ssp_dev *dev); |
| void ssp_save_state(struct ssp_dev *dev, struct ssp_state *ssp); |
| void ssp_restore_state(struct ssp_dev *dev, struct ssp_state *ssp); |
| int ssp_init(struct ssp_dev *dev, u32 port, u32 init_flags); |
| int ssp_config(struct ssp_dev *dev, u32 mode, u32 flags, u32 psp_flags, u32 speed); |
| void ssp_exit(struct ssp_dev *dev); |
| |
| /** |
| * ssp_write_reg - Write to a SSP register |
| * |
| * @dev: SSP device to access |
| * @reg: Register to write to |
| * @val: Value to be written. |
| */ |
| static inline void ssp_write_reg(struct ssp_device *dev, u32 reg, u32 val) |
| { |
| __raw_writel(val, dev->mmio_base + reg); |
| } |
| |
| /** |
| * ssp_read_reg - Read from a SSP register |
| * |
| * @dev: SSP device to access |
| * @reg: Register to read from |
| */ |
| static inline u32 ssp_read_reg(struct ssp_device *dev, u32 reg) |
| { |
| return __raw_readl(dev->mmio_base + reg); |
| } |
| |
| struct ssp_device *ssp_request(int port, const char *label); |
| void ssp_free(struct ssp_device *); |
| #endif /* __ASM_ARCH_SSP_H */ |
