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v3.5.6
  1#ifndef DW_SPI_HEADER_H
  2#define DW_SPI_HEADER_H
  3
  4#include <linux/io.h>
  5#include <linux/scatterlist.h>
  6
  7/* Register offsets */
  8#define DW_SPI_CTRL0			0x00
  9#define DW_SPI_CTRL1			0x04
 10#define DW_SPI_SSIENR			0x08
 11#define DW_SPI_MWCR			0x0c
 12#define DW_SPI_SER			0x10
 13#define DW_SPI_BAUDR			0x14
 14#define DW_SPI_TXFLTR			0x18
 15#define DW_SPI_RXFLTR			0x1c
 16#define DW_SPI_TXFLR			0x20
 17#define DW_SPI_RXFLR			0x24
 18#define DW_SPI_SR			0x28
 19#define DW_SPI_IMR			0x2c
 20#define DW_SPI_ISR			0x30
 21#define DW_SPI_RISR			0x34
 22#define DW_SPI_TXOICR			0x38
 23#define DW_SPI_RXOICR			0x3c
 24#define DW_SPI_RXUICR			0x40
 25#define DW_SPI_MSTICR			0x44
 26#define DW_SPI_ICR			0x48
 27#define DW_SPI_DMACR			0x4c
 28#define DW_SPI_DMATDLR			0x50
 29#define DW_SPI_DMARDLR			0x54
 30#define DW_SPI_IDR			0x58
 31#define DW_SPI_VERSION			0x5c
 32#define DW_SPI_DR			0x60
 33
 34/* Bit fields in CTRLR0 */
 35#define SPI_DFS_OFFSET			0
 36
 37#define SPI_FRF_OFFSET			4
 38#define SPI_FRF_SPI			0x0
 39#define SPI_FRF_SSP			0x1
 40#define SPI_FRF_MICROWIRE		0x2
 41#define SPI_FRF_RESV			0x3
 42
 43#define SPI_MODE_OFFSET			6
 44#define SPI_SCPH_OFFSET			6
 45#define SPI_SCOL_OFFSET			7
 46
 47#define SPI_TMOD_OFFSET			8
 48#define SPI_TMOD_MASK			(0x3 << SPI_TMOD_OFFSET)
 49#define	SPI_TMOD_TR			0x0		/* xmit & recv */
 50#define SPI_TMOD_TO			0x1		/* xmit only */
 51#define SPI_TMOD_RO			0x2		/* recv only */
 52#define SPI_TMOD_EPROMREAD		0x3		/* eeprom read mode */
 53
 54#define SPI_SLVOE_OFFSET		10
 55#define SPI_SRL_OFFSET			11
 56#define SPI_CFS_OFFSET			12
 57
 58/* Bit fields in SR, 7 bits */
 59#define SR_MASK				0x7f		/* cover 7 bits */
 60#define SR_BUSY				(1 << 0)
 61#define SR_TF_NOT_FULL			(1 << 1)
 62#define SR_TF_EMPT			(1 << 2)
 63#define SR_RF_NOT_EMPT			(1 << 3)
 64#define SR_RF_FULL			(1 << 4)
 65#define SR_TX_ERR			(1 << 5)
 66#define SR_DCOL				(1 << 6)
 67
 68/* Bit fields in ISR, IMR, RISR, 7 bits */
 69#define SPI_INT_TXEI			(1 << 0)
 70#define SPI_INT_TXOI			(1 << 1)
 71#define SPI_INT_RXUI			(1 << 2)
 72#define SPI_INT_RXOI			(1 << 3)
 73#define SPI_INT_RXFI			(1 << 4)
 74#define SPI_INT_MSTI			(1 << 5)
 75
 76/* TX RX interrupt level threshold, max can be 256 */
 77#define SPI_INT_THRESHOLD		32
 78
 79enum dw_ssi_type {
 80	SSI_MOTO_SPI = 0,
 81	SSI_TI_SSP,
 82	SSI_NS_MICROWIRE,
 83};
 84
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 85struct dw_spi;
 86struct dw_spi_dma_ops {
 87	int (*dma_init)(struct dw_spi *dws);
 88	void (*dma_exit)(struct dw_spi *dws);
 89	int (*dma_transfer)(struct dw_spi *dws, int cs_change);
 90};
 91
 92struct dw_spi {
 93	struct spi_master	*master;
 94	struct spi_device	*cur_dev;
 95	struct device		*parent_dev;
 96	enum dw_ssi_type	type;
 97	char			name[16];
 98
 99	void __iomem		*regs;
100	unsigned long		paddr;
101	u32			iolen;
102	int			irq;
103	u32			fifo_len;	/* depth of the FIFO buffer */
104	u32			max_freq;	/* max bus freq supported */
105
106	u16			bus_num;
107	u16			num_cs;		/* supported slave numbers */
108
109	/* Driver message queue */
110	struct workqueue_struct	*workqueue;
111	struct work_struct	pump_messages;
112	spinlock_t		lock;
113	struct list_head	queue;
114	int			busy;
115	int			run;
116
117	/* Message Transfer pump */
118	struct tasklet_struct	pump_transfers;
119
120	/* Current message transfer state info */
121	struct spi_message	*cur_msg;
122	struct spi_transfer	*cur_transfer;
123	struct chip_data	*cur_chip;
124	struct chip_data	*prev_chip;
125	size_t			len;
126	void			*tx;
127	void			*tx_end;
128	void			*rx;
129	void			*rx_end;
130	int			dma_mapped;
131	dma_addr_t		rx_dma;
132	dma_addr_t		tx_dma;
133	size_t			rx_map_len;
134	size_t			tx_map_len;
135	u8			n_bytes;	/* current is a 1/2 bytes op */
136	u8			max_bits_per_word;	/* maxim is 16b */
137	u32			dma_width;
138	int			cs_change;
139	irqreturn_t		(*transfer_handler)(struct dw_spi *dws);
140	void			(*cs_control)(u32 command);
141
142	/* Dma info */
143	int			dma_inited;
144	struct dma_chan		*txchan;
145	struct scatterlist	tx_sgl;
146	struct dma_chan		*rxchan;
147	struct scatterlist	rx_sgl;
148	int			dma_chan_done;
149	struct device		*dma_dev;
150	dma_addr_t		dma_addr; /* phy address of the Data register */
151	struct dw_spi_dma_ops	*dma_ops;
152	void			*dma_priv; /* platform relate info */
153	struct pci_dev		*dmac;
154
155	/* Bus interface info */
156	void			*priv;
157#ifdef CONFIG_DEBUG_FS
158	struct dentry *debugfs;
159#endif
160};
161
162static inline u32 dw_readl(struct dw_spi *dws, u32 offset)
163{
164	return __raw_readl(dws->regs + offset);
165}
166
167static inline void dw_writel(struct dw_spi *dws, u32 offset, u32 val)
168{
169	__raw_writel(val, dws->regs + offset);
170}
171
172static inline u16 dw_readw(struct dw_spi *dws, u32 offset)
173{
174	return __raw_readw(dws->regs + offset);
175}
176
177static inline void dw_writew(struct dw_spi *dws, u32 offset, u16 val)
178{
179	__raw_writew(val, dws->regs + offset);
180}
181
182static inline void spi_enable_chip(struct dw_spi *dws, int enable)
183{
184	dw_writel(dws, DW_SPI_SSIENR, (enable ? 1 : 0));
185}
186
187static inline void spi_set_clk(struct dw_spi *dws, u16 div)
188{
189	dw_writel(dws, DW_SPI_BAUDR, div);
190}
191
192static inline void spi_chip_sel(struct dw_spi *dws, u16 cs)
193{
194	if (cs > dws->num_cs)
195		return;
196
197	if (dws->cs_control)
198		dws->cs_control(1);
199
200	dw_writel(dws, DW_SPI_SER, 1 << cs);
201}
202
203/* Disable IRQ bits */
204static inline void spi_mask_intr(struct dw_spi *dws, u32 mask)
205{
206	u32 new_mask;
207
208	new_mask = dw_readl(dws, DW_SPI_IMR) & ~mask;
209	dw_writel(dws, DW_SPI_IMR, new_mask);
210}
211
212/* Enable IRQ bits */
213static inline void spi_umask_intr(struct dw_spi *dws, u32 mask)
214{
215	u32 new_mask;
216
217	new_mask = dw_readl(dws, DW_SPI_IMR) | mask;
218	dw_writel(dws, DW_SPI_IMR, new_mask);
219}
220
221/*
222 * Each SPI slave device to work with dw_api controller should
223 * has such a structure claiming its working mode (PIO/DMA etc),
224 * which can be save in the "controller_data" member of the
225 * struct spi_device
226 */
227struct dw_spi_chip {
228	u8 poll_mode;	/* 0 for contoller polling mode */
229	u8 type;	/* SPI/SSP/Micrwire */
230	u8 enable_dma;
231	void (*cs_control)(u32 command);
232};
233
234extern int dw_spi_add_host(struct dw_spi *dws);
235extern void dw_spi_remove_host(struct dw_spi *dws);
236extern int dw_spi_suspend_host(struct dw_spi *dws);
237extern int dw_spi_resume_host(struct dw_spi *dws);
238extern void dw_spi_xfer_done(struct dw_spi *dws);
239
240/* platform related setup */
241extern int dw_spi_mid_init(struct dw_spi *dws); /* Intel MID platforms */
242#endif /* DW_SPI_HEADER_H */
v3.1
  1#ifndef DW_SPI_HEADER_H
  2#define DW_SPI_HEADER_H
  3
  4#include <linux/io.h>
  5#include <linux/scatterlist.h>
  6
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
  7/* Bit fields in CTRLR0 */
  8#define SPI_DFS_OFFSET			0
  9
 10#define SPI_FRF_OFFSET			4
 11#define SPI_FRF_SPI			0x0
 12#define SPI_FRF_SSP			0x1
 13#define SPI_FRF_MICROWIRE		0x2
 14#define SPI_FRF_RESV			0x3
 15
 16#define SPI_MODE_OFFSET			6
 17#define SPI_SCPH_OFFSET			6
 18#define SPI_SCOL_OFFSET			7
 19
 20#define SPI_TMOD_OFFSET			8
 21#define SPI_TMOD_MASK			(0x3 << SPI_TMOD_OFFSET)
 22#define	SPI_TMOD_TR			0x0		/* xmit & recv */
 23#define SPI_TMOD_TO			0x1		/* xmit only */
 24#define SPI_TMOD_RO			0x2		/* recv only */
 25#define SPI_TMOD_EPROMREAD		0x3		/* eeprom read mode */
 26
 27#define SPI_SLVOE_OFFSET		10
 28#define SPI_SRL_OFFSET			11
 29#define SPI_CFS_OFFSET			12
 30
 31/* Bit fields in SR, 7 bits */
 32#define SR_MASK				0x7f		/* cover 7 bits */
 33#define SR_BUSY				(1 << 0)
 34#define SR_TF_NOT_FULL			(1 << 1)
 35#define SR_TF_EMPT			(1 << 2)
 36#define SR_RF_NOT_EMPT			(1 << 3)
 37#define SR_RF_FULL			(1 << 4)
 38#define SR_TX_ERR			(1 << 5)
 39#define SR_DCOL				(1 << 6)
 40
 41/* Bit fields in ISR, IMR, RISR, 7 bits */
 42#define SPI_INT_TXEI			(1 << 0)
 43#define SPI_INT_TXOI			(1 << 1)
 44#define SPI_INT_RXUI			(1 << 2)
 45#define SPI_INT_RXOI			(1 << 3)
 46#define SPI_INT_RXFI			(1 << 4)
 47#define SPI_INT_MSTI			(1 << 5)
 48
 49/* TX RX interrupt level threshold, max can be 256 */
 50#define SPI_INT_THRESHOLD		32
 51
 52enum dw_ssi_type {
 53	SSI_MOTO_SPI = 0,
 54	SSI_TI_SSP,
 55	SSI_NS_MICROWIRE,
 56};
 57
 58struct dw_spi_reg {
 59	u32	ctrl0;
 60	u32	ctrl1;
 61	u32	ssienr;
 62	u32	mwcr;
 63	u32	ser;
 64	u32	baudr;
 65	u32	txfltr;
 66	u32	rxfltr;
 67	u32	txflr;
 68	u32	rxflr;
 69	u32	sr;
 70	u32	imr;
 71	u32	isr;
 72	u32	risr;
 73	u32	txoicr;
 74	u32	rxoicr;
 75	u32	rxuicr;
 76	u32	msticr;
 77	u32	icr;
 78	u32	dmacr;
 79	u32	dmatdlr;
 80	u32	dmardlr;
 81	u32	idr;
 82	u32	version;
 83	u32	dr;		/* Currently oper as 32 bits,
 84				though only low 16 bits matters */
 85} __packed;
 86
 87struct dw_spi;
 88struct dw_spi_dma_ops {
 89	int (*dma_init)(struct dw_spi *dws);
 90	void (*dma_exit)(struct dw_spi *dws);
 91	int (*dma_transfer)(struct dw_spi *dws, int cs_change);
 92};
 93
 94struct dw_spi {
 95	struct spi_master	*master;
 96	struct spi_device	*cur_dev;
 97	struct device		*parent_dev;
 98	enum dw_ssi_type	type;
 99	char			name[16];
100
101	void __iomem		*regs;
102	unsigned long		paddr;
103	u32			iolen;
104	int			irq;
105	u32			fifo_len;	/* depth of the FIFO buffer */
106	u32			max_freq;	/* max bus freq supported */
107
108	u16			bus_num;
109	u16			num_cs;		/* supported slave numbers */
110
111	/* Driver message queue */
112	struct workqueue_struct	*workqueue;
113	struct work_struct	pump_messages;
114	spinlock_t		lock;
115	struct list_head	queue;
116	int			busy;
117	int			run;
118
119	/* Message Transfer pump */
120	struct tasklet_struct	pump_transfers;
121
122	/* Current message transfer state info */
123	struct spi_message	*cur_msg;
124	struct spi_transfer	*cur_transfer;
125	struct chip_data	*cur_chip;
126	struct chip_data	*prev_chip;
127	size_t			len;
128	void			*tx;
129	void			*tx_end;
130	void			*rx;
131	void			*rx_end;
132	int			dma_mapped;
133	dma_addr_t		rx_dma;
134	dma_addr_t		tx_dma;
135	size_t			rx_map_len;
136	size_t			tx_map_len;
137	u8			n_bytes;	/* current is a 1/2 bytes op */
138	u8			max_bits_per_word;	/* maxim is 16b */
139	u32			dma_width;
140	int			cs_change;
141	irqreturn_t		(*transfer_handler)(struct dw_spi *dws);
142	void			(*cs_control)(u32 command);
143
144	/* Dma info */
145	int			dma_inited;
146	struct dma_chan		*txchan;
147	struct scatterlist	tx_sgl;
148	struct dma_chan		*rxchan;
149	struct scatterlist	rx_sgl;
150	int			dma_chan_done;
151	struct device		*dma_dev;
152	dma_addr_t		dma_addr; /* phy address of the Data register */
153	struct dw_spi_dma_ops	*dma_ops;
154	void			*dma_priv; /* platform relate info */
155	struct pci_dev		*dmac;
156
157	/* Bus interface info */
158	void			*priv;
159#ifdef CONFIG_DEBUG_FS
160	struct dentry *debugfs;
161#endif
162};
163
164#define dw_readl(dw, name) \
165	__raw_readl(&(((struct dw_spi_reg *)dw->regs)->name))
166#define dw_writel(dw, name, val) \
167	__raw_writel((val), &(((struct dw_spi_reg *)dw->regs)->name))
168#define dw_readw(dw, name) \
169	__raw_readw(&(((struct dw_spi_reg *)dw->regs)->name))
170#define dw_writew(dw, name, val) \
171	__raw_writew((val), &(((struct dw_spi_reg *)dw->regs)->name))
 
 
 
 
 
 
 
 
 
 
 
172
173static inline void spi_enable_chip(struct dw_spi *dws, int enable)
174{
175	dw_writel(dws, ssienr, (enable ? 1 : 0));
176}
177
178static inline void spi_set_clk(struct dw_spi *dws, u16 div)
179{
180	dw_writel(dws, baudr, div);
181}
182
183static inline void spi_chip_sel(struct dw_spi *dws, u16 cs)
184{
185	if (cs > dws->num_cs)
186		return;
187
188	if (dws->cs_control)
189		dws->cs_control(1);
190
191	dw_writel(dws, ser, 1 << cs);
192}
193
194/* Disable IRQ bits */
195static inline void spi_mask_intr(struct dw_spi *dws, u32 mask)
196{
197	u32 new_mask;
198
199	new_mask = dw_readl(dws, imr) & ~mask;
200	dw_writel(dws, imr, new_mask);
201}
202
203/* Enable IRQ bits */
204static inline void spi_umask_intr(struct dw_spi *dws, u32 mask)
205{
206	u32 new_mask;
207
208	new_mask = dw_readl(dws, imr) | mask;
209	dw_writel(dws, imr, new_mask);
210}
211
212/*
213 * Each SPI slave device to work with dw_api controller should
214 * has such a structure claiming its working mode (PIO/DMA etc),
215 * which can be save in the "controller_data" member of the
216 * struct spi_device
217 */
218struct dw_spi_chip {
219	u8 poll_mode;	/* 0 for contoller polling mode */
220	u8 type;	/* SPI/SSP/Micrwire */
221	u8 enable_dma;
222	void (*cs_control)(u32 command);
223};
224
225extern int dw_spi_add_host(struct dw_spi *dws);
226extern void dw_spi_remove_host(struct dw_spi *dws);
227extern int dw_spi_suspend_host(struct dw_spi *dws);
228extern int dw_spi_resume_host(struct dw_spi *dws);
229extern void dw_spi_xfer_done(struct dw_spi *dws);
230
231/* platform related setup */
232extern int dw_spi_mid_init(struct dw_spi *dws); /* Intel MID platforms */
233#endif /* DW_SPI_HEADER_H */