[mirror_ubuntu-artful-kernel.git] / include / linux / spi / dw_spi.h

#ifndef DW_SPI_HEADER_H
#define DW_SPI_HEADER_H
#include <linux/io.h>

/* Bit fields in CTRLR0 */
#define SPI_DFS_OFFSET			0

#define SPI_FRF_OFFSET			4
#define SPI_FRF_SPI			0x0
#define SPI_FRF_SSP			0x1
#define SPI_FRF_MICROWIRE		0x2
#define SPI_FRF_RESV			0x3

#define SPI_MODE_OFFSET			6
#define SPI_SCPH_OFFSET			6
#define SPI_SCOL_OFFSET			7
#define SPI_TMOD_OFFSET			8
#define	SPI_TMOD_TR			0x0		/* xmit & recv */
#define SPI_TMOD_TO			0x1		/* xmit only */
#define SPI_TMOD_RO			0x2		/* recv only */
#define SPI_TMOD_EPROMREAD		0x3		/* eeprom read mode */

#define SPI_SLVOE_OFFSET		10
#define SPI_SRL_OFFSET			11
#define SPI_CFS_OFFSET			12

/* Bit fields in SR, 7 bits */
#define SR_MASK				0x7f		/* cover 7 bits */
#define SR_BUSY				(1 << 0)
#define SR_TF_NOT_FULL			(1 << 1)
#define SR_TF_EMPT			(1 << 2)
#define SR_RF_NOT_EMPT			(1 << 3)
#define SR_RF_FULL			(1 << 4)
#define SR_TX_ERR			(1 << 5)
#define SR_DCOL				(1 << 6)

/* Bit fields in ISR, IMR, RISR, 7 bits */
#define SPI_INT_TXEI			(1 << 0)
#define SPI_INT_TXOI			(1 << 1)
#define SPI_INT_RXUI			(1 << 2)
#define SPI_INT_RXOI			(1 << 3)
#define SPI_INT_RXFI			(1 << 4)
#define SPI_INT_MSTI			(1 << 5)

/* TX RX interrupt level threshhold, max can be 256 */
#define SPI_INT_THRESHOLD		32

enum dw_ssi_type {
	SSI_MOTO_SPI = 0,
	SSI_TI_SSP,
	SSI_NS_MICROWIRE,
};

struct dw_spi_reg {
	u32	ctrl0;
	u32	ctrl1;
	u32	ssienr;
	u32	mwcr;
	u32	ser;
	u32	baudr;
	u32	txfltr;
	u32	rxfltr;
	u32	txflr;
	u32	rxflr;
	u32	sr;
	u32	imr;
	u32	isr;
	u32	risr;
	u32	txoicr;
	u32	rxoicr;
	u32	rxuicr;
	u32	msticr;
	u32	icr;
	u32	dmacr;
	u32	dmatdlr;
	u32	dmardlr;
	u32	idr;
	u32	version;
	u32	dr;		/* Currently oper as 32 bits,
				though only low 16 bits matters */
} __packed;

struct dw_spi {
	struct spi_master	*master;
	struct spi_device	*cur_dev;
	struct device		*parent_dev;
	enum dw_ssi_type	type;

	void __iomem		*regs;
	unsigned long		paddr;
	u32			iolen;
	int			irq;
	u32			max_freq;	/* max bus freq supported */

	u16			bus_num;
	u16			num_cs;		/* supported slave numbers */

	/* Driver message queue */
	struct workqueue_struct	*workqueue;
	struct work_struct	pump_messages;
	spinlock_t		lock;
	struct list_head	queue;
	int			busy;
	int			run;

	/* Message Transfer pump */
	struct tasklet_struct	pump_transfers;

	/* Current message transfer state info */
	struct spi_message	*cur_msg;
	struct spi_transfer	*cur_transfer;
	struct chip_data	*cur_chip;
	struct chip_data	*prev_chip;
	size_t			len;
	void			*tx;
	void			*tx_end;
	void			*rx;
	void			*rx_end;
	int			dma_mapped;
	dma_addr_t		rx_dma;
	dma_addr_t		tx_dma;
	size_t			rx_map_len;
	size_t			tx_map_len;
	u8			n_bytes;	/* current is a 1/2 bytes op */
	u8			max_bits_per_word;	/* maxim is 16b */
	u32			dma_width;
	int			cs_change;
	int			(*write)(struct dw_spi *dws);
	int			(*read)(struct dw_spi *dws);
	irqreturn_t		(*transfer_handler)(struct dw_spi *dws);
	void			(*cs_control)(u32 command);

	/* Dma info */
	int			dma_inited;
	struct dma_chan		*txchan;
	struct dma_chan		*rxchan;
	int			txdma_done;
	int			rxdma_done;
	u64			tx_param;
	u64			rx_param;
	struct device		*dma_dev;
	dma_addr_t		dma_addr;

	/* Bus interface info */
	void			*priv;
#ifdef CONFIG_DEBUG_FS
	struct dentry *debugfs;
#endif
};

#define dw_readl(dw, name) \
	__raw_readl(&(((struct dw_spi_reg *)dw->regs)->name))
#define dw_writel(dw, name, val) \
	__raw_writel((val), &(((struct dw_spi_reg *)dw->regs)->name))
#define dw_readw(dw, name) \
	__raw_readw(&(((struct dw_spi_reg *)dw->regs)->name))
#define dw_writew(dw, name, val) \
	__raw_writew((val), &(((struct dw_spi_reg *)dw->regs)->name))

static inline void spi_enable_chip(struct dw_spi *dws, int enable)
{
	dw_writel(dws, ssienr, (enable ? 1 : 0));
}

static inline void spi_set_clk(struct dw_spi *dws, u16 div)
{
	dw_writel(dws, baudr, div);
}

static inline void spi_chip_sel(struct dw_spi *dws, u16 cs)
{
	if (cs > dws->num_cs)
		return;
	dw_writel(dws, ser, 1 << cs);
}

/* Disable IRQ bits */
static inline void spi_mask_intr(struct dw_spi *dws, u32 mask)
{
	u32 new_mask;

	new_mask = dw_readl(dws, imr) & ~mask;
	dw_writel(dws, imr, new_mask);
}

/* Enable IRQ bits */
static inline void spi_umask_intr(struct dw_spi *dws, u32 mask)
{
	u32 new_mask;

	new_mask = dw_readl(dws, imr) | mask;
	dw_writel(dws, imr, new_mask);
}

/*
 * Each SPI slave device to work with dw_api controller should
 * has such a structure claiming its working mode (PIO/DMA etc),
 * which can be save in the "controller_data" member of the
 * struct spi_device
 */
struct dw_spi_chip {
	u8 poll_mode;	/* 0 for contoller polling mode */
	u8 type;	/* SPI/SSP/Micrwire */
	u8 enable_dma;
	void (*cs_control)(u32 command);
};

extern int dw_spi_add_host(struct dw_spi *dws);
extern void dw_spi_remove_host(struct dw_spi *dws);
extern int dw_spi_suspend_host(struct dw_spi *dws);
extern int dw_spi_resume_host(struct dw_spi *dws);
#endif /* DW_SPI_HEADER_H */
Commit	Line	Data
e24c7452 FT	1	#ifndef DW_SPI_HEADER_H
	2	#define DW_SPI_HEADER_H
	3	#include <linux/io.h>
	4
	5	/* Bit fields in CTRLR0 */
	6	#define SPI_DFS_OFFSET 0
	7
	8	#define SPI_FRF_OFFSET 4
	9	#define SPI_FRF_SPI 0x0
	10	#define SPI_FRF_SSP 0x1
	11	#define SPI_FRF_MICROWIRE 0x2
	12	#define SPI_FRF_RESV 0x3
	13
	14	#define SPI_MODE_OFFSET 6
	15	#define SPI_SCPH_OFFSET 6
	16	#define SPI_SCOL_OFFSET 7
	17	#define SPI_TMOD_OFFSET 8
	18	#define SPI_TMOD_TR 0x0 /* xmit & recv */
	19	#define SPI_TMOD_TO 0x1 /* xmit only */
	20	#define SPI_TMOD_RO 0x2 /* recv only */
	21	#define SPI_TMOD_EPROMREAD 0x3 /* eeprom read mode */
	22
	23	#define SPI_SLVOE_OFFSET 10
	24	#define SPI_SRL_OFFSET 11
	25	#define SPI_CFS_OFFSET 12
	26
	27	/* Bit fields in SR, 7 bits */
	28	#define SR_MASK 0x7f /* cover 7 bits */
	29	#define SR_BUSY (1 << 0)
	30	#define SR_TF_NOT_FULL (1 << 1)
	31	#define SR_TF_EMPT (1 << 2)
	32	#define SR_RF_NOT_EMPT (1 << 3)
	33	#define SR_RF_FULL (1 << 4)
	34	#define SR_TX_ERR (1 << 5)
	35	#define SR_DCOL (1 << 6)
	36
	37	/* Bit fields in ISR, IMR, RISR, 7 bits */
	38	#define SPI_INT_TXEI (1 << 0)
	39	#define SPI_INT_TXOI (1 << 1)
	40	#define SPI_INT_RXUI (1 << 2)
	41	#define SPI_INT_RXOI (1 << 3)
	42	#define SPI_INT_RXFI (1 << 4)
	43	#define SPI_INT_MSTI (1 << 5)
	44
	45	/* TX RX interrupt level threshhold, max can be 256 */
	46	#define SPI_INT_THRESHOLD 32
	47
	48	enum dw_ssi_type {
	49	SSI_MOTO_SPI = 0,
	50	SSI_TI_SSP,
	51	SSI_NS_MICROWIRE,
	52	};
	53
	54	struct dw_spi_reg {
	55	u32 ctrl0;
	56	u32 ctrl1;
	57	u32 ssienr;
	58	u32 mwcr;
	59	u32 ser;
	60	u32 baudr;
	61	u32 txfltr;
	62	u32 rxfltr;
	63	u32 txflr;
	64	u32 rxflr;
65	u32 sr;
66	u32 imr;
67	u32 isr;
68	u32 risr;
69	u32 txoicr;
70	u32 rxoicr;
71	u32 rxuicr;
72	u32 msticr;
73	u32 icr;
74	u32 dmacr;
75	u32 dmatdlr;
76	u32 dmardlr;
77	u32 idr;
78	u32 version;
79	u32 dr; /* Currently oper as 32 bits,
80	though only low 16 bits matters */
81	} __packed;
82
83	struct dw_spi {
84	struct spi_master *master;
85	struct spi_device *cur_dev;
86	struct device *parent_dev;
87	enum dw_ssi_type type;
88
89	void __iomem *regs;
90	unsigned long paddr;
91	u32 iolen;
92	int irq;
93	u32 max_freq; /* max bus freq supported */
94
95	u16 bus_num;
96	u16 num_cs; /* supported slave numbers */
97
98	/* Driver message queue */
99	struct workqueue_struct *workqueue;
100	struct work_struct pump_messages;
101	spinlock_t lock;
102	struct list_head queue;
103	int busy;
104	int run;
105
106	/* Message Transfer pump */
107	struct tasklet_struct pump_transfers;
108
109	/* Current message transfer state info */
110	struct spi_message *cur_msg;
111	struct spi_transfer *cur_transfer;
112	struct chip_data *cur_chip;
113	struct chip_data *prev_chip;
114	size_t len;
115	void *tx;
116	void *tx_end;
117	void *rx;
118	void *rx_end;
119	int dma_mapped;
120	dma_addr_t rx_dma;
121	dma_addr_t tx_dma;
122	size_t rx_map_len;
123	size_t tx_map_len;
124	u8 n_bytes; /* current is a 1/2 bytes op */
125	u8 max_bits_per_word; /* maxim is 16b */
126	u32 dma_width;
127	int cs_change;
128	int (write)(struct dw_spi dws);
129	int (read)(struct dw_spi dws);
130	irqreturn_t (transfer_handler)(struct dw_spi dws);
131	void (*cs_control)(u32 command);
132
133	/* Dma info */
134	int dma_inited;
135	struct dma_chan *txchan;
136	struct dma_chan *rxchan;
137	int txdma_done;
138	int rxdma_done;
139	u64 tx_param;
140	u64 rx_param;
141	struct device *dma_dev;
142	dma_addr_t dma_addr;
143
144	/* Bus interface info */
145	void *priv;
146	#ifdef CONFIG_DEBUG_FS
147	struct dentry *debugfs;
148	#endif
149	};
150
151	#define dw_readl(dw, name) \
152	__raw_readl(&(((struct dw_spi_reg *)dw->regs)->name))
153	#define dw_writel(dw, name, val) \
154	__raw_writel((val), &(((struct dw_spi_reg *)dw->regs)->name))
155	#define dw_readw(dw, name) \
156	__raw_readw(&(((struct dw_spi_reg *)dw->regs)->name))
157	#define dw_writew(dw, name, val) \
158	__raw_writew((val), &(((struct dw_spi_reg *)dw->regs)->name))
159
160	static inline void spi_enable_chip(struct dw_spi *dws, int enable)
161	{
162	dw_writel(dws, ssienr, (enable ? 1 : 0));
163	}
164
165	static inline void spi_set_clk(struct dw_spi *dws, u16 div)
166	{
167	dw_writel(dws, baudr, div);
168	}
169
170	static inline void spi_chip_sel(struct dw_spi *dws, u16 cs)
171	{
172	if (cs > dws->num_cs)
173	return;
174	dw_writel(dws, ser, 1 << cs);
175	}
176
177	/* Disable IRQ bits */
178	static inline void spi_mask_intr(struct dw_spi *dws, u32 mask)
179	{
180	u32 new_mask;
181
182	new_mask = dw_readl(dws, imr) & ~mask;
183	dw_writel(dws, imr, new_mask);
184	}
185
186	/* Enable IRQ bits */
187	static inline void spi_umask_intr(struct dw_spi *dws, u32 mask)
188	{
189	u32 new_mask;
190
191	new_mask = dw_readl(dws, imr) \| mask;
192	dw_writel(dws, imr, new_mask);
193	}
194
195	/*
196	* Each SPI slave device to work with dw_api controller should
197	* has such a structure claiming its working mode (PIO/DMA etc),
198	* which can be save in the "controller_data" member of the
199	* struct spi_device
200	*/
201	struct dw_spi_chip {
202	u8 poll_mode; /* 0 for contoller polling mode */
203	u8 type; /* SPI/SSP/Micrwire */
204	u8 enable_dma;
205	void (*cs_control)(u32 command);
206	};
207
208	extern int dw_spi_add_host(struct dw_spi *dws);
209	extern void dw_spi_remove_host(struct dw_spi *dws);
210	extern int dw_spi_suspend_host(struct dw_spi *dws);
211	extern int dw_spi_resume_host(struct dw_spi *dws);
212	#endif /* DW_SPI_HEADER_H */