#include <malloc.h>
#include <spi.h>
+#ifndef CONFIG_ALTERA_SPI_IDLE_VAL
+#define CONFIG_ALTERA_SPI_IDLE_VAL 0xff
+#endif
+
+#ifndef CONFIG_SYS_ALTERA_SPI_LIST
+#define CONFIG_SYS_ALTERA_SPI_LIST { CONFIG_SYS_SPI_BASE }
+#endif
+
struct altera_spi_regs {
u32 rxdata;
u32 txdata;
#define ALTERA_SPI_CONTROL_IE_MSK (1 << 8)
#define ALTERA_SPI_CONTROL_SSO_MSK (1 << 10)
-#ifndef CONFIG_SYS_ALTERA_SPI_LIST
-#define CONFIG_SYS_ALTERA_SPI_LIST { CONFIG_SYS_SPI_BASE }
-#endif
-
static ulong altera_spi_base_list[] = CONFIG_SYS_ALTERA_SPI_LIST;
struct altera_spi_slave {
writel(0, &altspi->regs->slave_sel);
}
-#ifndef CONFIG_ALTERA_SPI_IDLE_VAL
-# define CONFIG_ALTERA_SPI_IDLE_VAL 0xff
-#endif
-
int spi_xfer(struct spi_slave *slave, unsigned int bitlen, const void *dout,
void *din, unsigned long flags)
{
struct altera_spi_slave *altspi = to_altera_spi_slave(slave);
/* assume spi core configured to do 8 bit transfers */
- uint bytes = bitlen / 8;
- const uchar *txp = dout;
- uchar *rxp = din;
- uint32_t reg, start;
+ unsigned int bytes = bitlen / 8;
+ const unsigned char *txp = dout;
+ unsigned char *rxp = din;
+ uint32_t reg, data, start;
debug("%s: bus:%i cs:%i bitlen:%i bytes:%i flags:%lx\n", __func__,
slave->bus, slave->cs, bitlen, bytes, flags);
spi_cs_activate(slave);
while (bytes--) {
- uchar d = txp ? *txp++ : CONFIG_ALTERA_SPI_IDLE_VAL;
+ if (txp)
+ data = *txp++;
+ else
+ data = CONFIG_ALTERA_SPI_IDLE_VAL;
- debug("%s: tx:%x ", __func__, d);
- writel(d, &altspi->regs->txdata);
+ debug("%s: tx:%x ", __func__, data);
+ writel(data, &altspi->regs->txdata);
start = get_timer(0);
while (1) {
}
}
- d = readl(&altspi->regs->rxdata);
+ data = readl(&altspi->regs->rxdata);
if (rxp)
- *rxp++ = d;
+ *rxp++ = data & 0xff;
- debug("rx:%x\n", d);
+ debug("rx:%x\n", data);
}
done: