1 #ifndef DW_SPI_HEADER_H
2 #define DW_SPI_HEADER_H
5 #include <linux/scatterlist.h>
7 /* Bit fields in CTRLR0 */
8 #define SPI_DFS_OFFSET 0
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
16 #define SPI_MODE_OFFSET 6
17 #define SPI_SCPH_OFFSET 6
18 #define SPI_SCOL_OFFSET 7
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 */
27 #define SPI_SLVOE_OFFSET 10
28 #define SPI_SRL_OFFSET 11
29 #define SPI_CFS_OFFSET 12
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)
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)
49 /* TX RX interrupt level threshold, max can be 256 */
50 #define SPI_INT_THRESHOLD 32
83 u32 dr; /* Currently oper as 32 bits,
84 though only low 16 bits matters */
88 struct 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);
95 struct spi_master *master;
96 struct spi_device *cur_dev;
97 struct device *parent_dev;
98 enum dw_ssi_type type;
105 u32 fifo_len; /* depth of the FIFO buffer */
106 u32 max_freq; /* max bus freq supported */
109 u16 num_cs; /* supported slave numbers */
111 /* Driver message queue */
112 struct workqueue_struct *workqueue;
113 struct work_struct pump_messages;
115 struct list_head queue;
119 /* Message Transfer pump */
120 struct tasklet_struct pump_transfers;
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;
137 u8 n_bytes; /* current is a 1/2 bytes op */
138 u8 max_bits_per_word; /* maxim is 16b */
141 irqreturn_t (*transfer_handler)(struct dw_spi *dws);
142 void (*cs_control)(u32 command);
146 struct dma_chan *txchan;
147 struct scatterlist tx_sgl;
148 struct dma_chan *rxchan;
149 struct scatterlist rx_sgl;
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;
157 /* Bus interface info */
159 #ifdef CONFIG_DEBUG_FS
160 struct dentry *debugfs;
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))
173 static inline void spi_enable_chip(struct dw_spi *dws, int enable)
175 dw_writel(dws, ssienr, (enable ? 1 : 0));
178 static inline void spi_set_clk(struct dw_spi *dws, u16 div)
180 dw_writel(dws, baudr, div);
183 static inline void spi_chip_sel(struct dw_spi *dws, u16 cs)
185 if (cs > dws->num_cs)
191 dw_writel(dws, ser, 1 << cs);
194 /* Disable IRQ bits */
195 static inline void spi_mask_intr(struct dw_spi *dws, u32 mask)
199 new_mask = dw_readl(dws, imr) & ~mask;
200 dw_writel(dws, imr, new_mask);
203 /* Enable IRQ bits */
204 static inline void spi_umask_intr(struct dw_spi *dws, u32 mask)
208 new_mask = dw_readl(dws, imr) | mask;
209 dw_writel(dws, imr, new_mask);
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
219 u8 poll_mode; /* 0 for contoller polling mode */
220 u8 type; /* SPI/SSP/Micrwire */
222 void (*cs_control)(u32 command);
225 extern int dw_spi_add_host(struct dw_spi *dws);
226 extern void dw_spi_remove_host(struct dw_spi *dws);
227 extern int dw_spi_suspend_host(struct dw_spi *dws);
228 extern int dw_spi_resume_host(struct dw_spi *dws);
229 extern void dw_spi_xfer_done(struct dw_spi *dws);
231 /* platform related setup */
232 extern int dw_spi_mid_init(struct dw_spi *dws); /* Intel MID platforms */
233 #endif /* DW_SPI_HEADER_H */