struct dw_spi_dma_ops {
int (*dma_init)(struct dw_spi *dws);
void (*dma_exit)(struct dw_spi *dws);
- int (*dma_transfer)(struct dw_spi *dws, int cs_change);
+ int (*dma_setup)(struct dw_spi *dws);
+ int (*dma_transfer)(struct dw_spi *dws);
};
struct dw_spi {
struct spi_master *master;
- struct spi_device *cur_dev;
enum dw_ssi_type type;
char name[16];
u16 bus_num;
u16 num_cs; /* supported slave numbers */
- /* 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;
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;
irqreturn_t (*transfer_handler)(struct dw_spi *dws);
- void (*cs_control)(u32 command);
/* Dma info */
int dma_inited;
dw_writel(dws, DW_SPI_BAUDR, div);
}
-static inline void spi_chip_sel(struct dw_spi *dws, struct spi_device *spi,
- int active)
-{
- u16 cs = spi->chip_select;
- int gpio_val = active ? (spi->mode & SPI_CS_HIGH) :
- !(spi->mode & SPI_CS_HIGH);
-
- if (dws->cs_control)
- dws->cs_control(active);
- if (gpio_is_valid(spi->cs_gpio))
- gpio_set_value(spi->cs_gpio, gpio_val);
-
- if (active)
- dw_writel(dws, DW_SPI_SER, 1 << cs);
-}
-
/* Disable IRQ bits */
static inline void spi_mask_intr(struct dw_spi *dws, u32 mask)
{
dw_writel(dws, DW_SPI_IMR, new_mask);
}
+/*
+ * This does disable the SPI controller, interrupts, and re-enable the
+ * controller back. Transmit and receive FIFO buffers are cleared when the
+ * device is disabled.
+ */
+static inline void spi_reset_chip(struct dw_spi *dws)
+{
+ spi_enable_chip(dws, 0);
+ spi_mask_intr(dws, 0xff);
+ spi_enable_chip(dws, 1);
+}
+
/*
* Each SPI slave device to work with dw_api controller should
* has such a structure claiming its working mode (PIO/DMA etc),
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);
-extern void dw_spi_xfer_done(struct dw_spi *dws);
/* platform related setup */
extern int dw_spi_mid_init(struct dw_spi *dws); /* Intel MID platforms */