Add qemu 2.4.0

[kvmfornfv.git] / qemu / roms / u-boot / drivers / spi / mpc52xx_spi.c

diff --git a/qemu/roms/u-boot/drivers/spi/mpc52xx_spi.c b/qemu/roms/u-boot/drivers/spi/mpc52xx_spi.c
new file mode 100644 (file)
index 0000000..4613bec
--- /dev/null
+++ b/qemu/roms/u-boot/drivers/spi/mpc52xx_spi.c
@@ -0,0 +1,90 @@
+/*
+ * (C) Copyright 2009
+ * Frank Bodammer <frank.bodammer@gcd-solutions.de>
+ * (C) Copyright 2009 Semihalf, Grzegorz Bernacki
+ *
+ * SPDX-License-Identifier:    GPL-2.0+
+ */
+
+#include <common.h>
+#include <asm/io.h>
+#include <malloc.h>
+#include <spi.h>
+#include <mpc5xxx.h>
+
+void spi_init(void)
+{
+       struct mpc5xxx_spi *spi = (struct mpc5xxx_spi *)MPC5XXX_SPI;
+       /*
+        * Its important to use the correct order when initializing the
+        * registers
+        */
+       out_8(&spi->ddr, 0x0F); /* set all SPI pins as output */
+       out_8(&spi->pdr, 0x00); /* set SS low */
+       /* SPI is master, SS is general purpose output */
+       out_8(&spi->cr1, SPI_CR_MSTR | SPI_CR_SPE);
+       out_8(&spi->cr2, 0x00); /* normal operation */
+       out_8(&spi->brr, 0x77); /* baud rate: IPB clock / 2048 */
+}
+
+struct spi_slave *spi_setup_slave(unsigned int bus, unsigned int cs,
+                                 unsigned int max_hz, unsigned int mode)
+{
+       struct spi_slave *slave;
+
+       slave = spi_alloc_slave_base(bus, cs);
+       if (!slave)
+               return NULL;
+
+       return slave;
+}
+
+void spi_free_slave(struct spi_slave *slave)
+{
+       free(slave);
+}
+
+int spi_claim_bus(struct spi_slave *slave)
+{
+       return 0;
+}
+
+void spi_release_bus(struct spi_slave *slave)
+{
+       return;
+}
+
+int spi_xfer(struct spi_slave *slave, unsigned int bitlen, const void *dout,
+            void *din, unsigned long flags)
+{
+       struct mpc5xxx_spi *spi = (struct mpc5xxx_spi *)MPC5XXX_SPI;
+       int i, iter = bitlen >> 3;
+       const uchar *txp = dout;
+       uchar *rxp = din;
+
+       debug("spi_xfer: slave %u:%u dout %08X din %08X bitlen %u\n",
+             slave->bus, slave->cs, *(uint *) dout, *(uint *) din, bitlen);
+
+       if (flags & SPI_XFER_BEGIN)
+               setbits_8(&spi->pdr, SPI_PDR_SS);
+
+       for (i = 0; i < iter; i++) {
+               udelay(1000);
+               debug("spi_xfer: sending %x\n", txp[i]);
+               out_8(&spi->dr, txp[i]);
+               while (!(in_8(&spi->sr) & SPI_SR_SPIF)) {
+                       udelay(1000);
+                       if (in_8(&spi->sr) & SPI_SR_WCOL) {
+                               rxp[i] = in_8(&spi->dr);
+                               puts("spi_xfer: write collision\n");
+                               return -1;
+                       }
+               }
+               rxp[i] = in_8(&spi->dr);
+               debug("spi_xfer: received %x\n", rxp[i]);
+       }
+       if (flags & SPI_XFER_END)
+               clrbits_8(&spi->pdr, SPI_PDR_SS);
+
+       return 0;
+}