SPI API improvements

[oweals/u-boot.git] / drivers / spi / mpc8xxx_spi.c

diff --git a/drivers/spi/mpc8xxx_spi.c b/drivers/spi/mpc8xxx_spi.c
index 2fe838c45d59f441b355ed10eb4ff5a357c89aff..136fb50052f1902c1cc285f0dfe46b880a3cbe8e 100644 (file)
--- a/drivers/spi/mpc8xxx_spi.c
+++ b/drivers/spi/mpc8xxx_spi.c
@@ -24,6 +24,7 @@
 #include <common.h>
 #if defined(CONFIG_MPC8XXX_SPI) && defined(CONFIG_HARD_SPI)
 
+#include <malloc.h>
 #include <spi.h>
 #include <asm/mpc8xxx_spi.h>
 
@@ -37,6 +38,34 @@
 
 #define SPI_TIMEOUT    1000
 
+struct spi_slave *spi_setup_slave(unsigned int bus, unsigned int cs,
+               unsigned int max_hz, unsigned int mode)
+{
+       struct spi_slave *slave;
+
+       if (!spi_cs_is_valid(bus, cs))
+               return NULL;
+
+       slave = malloc(sizeof(struct spi_slave));
+       if (!slave)
+               return NULL;
+
+       slave->bus = bus;
+       slave->cs = cs;
+
+       /*
+        * TODO: Some of the code in spi_init() should probably move
+        * here, or into spi_claim_bus() below.
+        */
+
+       return slave;
+}
+
+void spi_free_slave(struct spi_slave *slave)
+{
+       free(slave);
+}
+
 void spi_init(void)
 {
        volatile spi8xxx_t *spi = &((immap_t *) (CFG_IMMR))->spi;
@@ -53,7 +82,18 @@ void spi_init(void)
        spi->com = 0;           /* LST bit doesn't do anything, so disregard */
 }
 
-int spi_xfer(spi_chipsel_type chipsel, int bitlen, uchar *dout, uchar *din)
+int spi_claim_bus(struct spi_slave *slave)
+{
+       return 0;
+}
+
+void spi_release_bus(struct spi_slave *slave)
+{
+
+}
+
+int spi_xfer(struct spi_slave *slave, unsigned int bitlen, const void *dout,
+               void *din, unsigned long flags)
 {
        volatile spi8xxx_t *spi = &((immap_t *) (CFG_IMMR))->spi;
        unsigned int tmpdout, tmpdin, event;
@@ -61,11 +101,11 @@ int spi_xfer(spi_chipsel_type chipsel, int bitlen, uchar *dout, uchar *din)
        int tm, isRead = 0;
        unsigned char charSize = 32;
 
-       debug("spi_xfer: chipsel %08X dout %08X din %08X bitlen %d\n",
-             (int)chipsel, *(uint *) dout, *(uint *) din, bitlen);
+       debug("spi_xfer: slave %u:%u dout %08X din %08X bitlen %u\n",
+             slave->bus, slave->cs, *(uint *) dout, *(uint *) din, bitlen);
 
-       if (chipsel != NULL)
-               (*chipsel) (1); /* select the target chip */
+       if (flags & SPI_XFER_BEGIN)
+               spi_cs_activate(slave);
 
        spi->event = 0xffffffff;        /* Clear all SPI events */
 
@@ -135,8 +175,8 @@ int spi_xfer(spi_chipsel_type chipsel, int bitlen, uchar *dout, uchar *din)
                debug("*** spi_xfer: transfer ended. Value=%08x\n", tmpdin);
        }
 
-       if (chipsel != NULL)
-               (*chipsel) (0); /* deselect the target chip */
+       if (flags & SPI_XFER_END)
+               spi_cs_deactivate(slave);
 
        return 0;
 }