X-Git-Url: https://git.sur5r.net/?a=blobdiff_plain;f=drivers%2Fspi%2Fmpc8xxx_spi.c;h=8d6d86d2b0a1728aaf832b321b9e2352b4d72b5f;hb=6189f76ae8fb3549349443d1d702d3d652d1244b;hp=2fe838c45d59f441b355ed10eb4ff5a357c89aff;hpb=20c93959330aba8b5bbdbfde1ef319e99eba235d;p=u-boot

diff --git a/drivers/spi/mpc8xxx_spi.c b/drivers/spi/mpc8xxx_spi.c
index 2fe838c45d..8d6d86d2b0 100644
--- a/drivers/spi/mpc8xxx_spi.c
+++ b/drivers/spi/mpc8xxx_spi.c
@@ -1,29 +1,12 @@
+// SPDX-License-Identifier: GPL-2.0+
 /*
  * Copyright (c) 2006 Ben Warren, Qstreams Networks Inc.
- * With help from the common/soft_spi and cpu/mpc8260 drivers
- *
- * See file CREDITS for list of people who contributed to this
- * project.
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License as
- * published by the Free Software Foundation; either version 2 of
- * the License, or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
- * MA 02111-1307 USA
+ * With help from the common/soft_spi and arch/powerpc/cpu/mpc8260 drivers
  */
 
 #include <common.h>
-#if defined(CONFIG_MPC8XXX_SPI) && defined(CONFIG_HARD_SPI)
 
+#include <malloc.h>
 #include <spi.h>
 #include <asm/mpc8xxx_spi.h>
 
@@ -37,35 +20,71 @@
 
 #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 = spi_alloc_slave_base(bus, cs);
+	if (!slave)
+		return NULL;
+
+	/*
+	 * 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;
+	volatile spi8xxx_t *spi = &((immap_t *) (CONFIG_SYS_IMMR))->spi;
 
 	/*
 	 * SPI pins on the MPC83xx are not muxed, so all we do is initialize
 	 * some registers
 	 */
 	spi->mode = SPI_MODE_REV | SPI_MODE_MS | SPI_MODE_EN;
-	spi->mode = (spi->mode & 0xfff0ffff) | (1 << 16); /* Use SYSCLK / 8
+	spi->mode = (spi->mode & 0xfff0ffff) | BIT(16); /* Use SYSCLK / 8
 							     (16.67MHz typ.) */
 	spi->event = 0xffffffff;	/* Clear all SPI events */
 	spi->mask = 0x00000000;	/* Mask  all SPI interrupts */
 	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)
 {
-	volatile spi8xxx_t *spi = &((immap_t *) (CFG_IMMR))->spi;
+
+}
+
+int spi_xfer(struct spi_slave *slave, unsigned int bitlen, const void *dout,
+		void *din, unsigned long flags)
+{
+	volatile spi8xxx_t *spi = &((immap_t *) (CONFIG_SYS_IMMR))->spi;
 	unsigned int tmpdout, tmpdin, event;
-	int numBlks = bitlen / 32 + (bitlen % 32 ? 1 : 0);
+	int numBlks = DIV_ROUND_UP(bitlen, 32);
 	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 */
 
@@ -85,13 +104,15 @@ int spi_xfer(spi_chipsel_type chipsel, int bitlen, uchar *dout, uchar *din)
 		 * len > 16               0
 		 */
 
+		spi->mode &= ~SPI_MODE_EN;
+
 		if (bitlen <= 16) {
 			if (bitlen <= 4)
 				spi->mode = (spi->mode & 0xff0fffff) |
-				            (3 << 20);
+					    (3 << 20);
 			else
 				spi->mode = (spi->mode & 0xff0fffff) |
-				            ((bitlen - 1) << 20);
+					    ((bitlen - 1) << 20);
 		} else {
 			spi->mode = (spi->mode & 0xff0fffff);
 			/* Set up the next iteration if sending > 32 bits */
@@ -99,6 +120,8 @@ int spi_xfer(spi_chipsel_type chipsel, int bitlen, uchar *dout, uchar *din)
 			dout += 4;
 		}
 
+		spi->mode |= SPI_MODE_EN;
+
 		spi->tx = tmpdout;	/* Write the data out */
 		debug("*** spi_xfer: ... %08x written\n", tmpdout);
 
@@ -135,9 +158,8 @@ 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;
 }
-#endif				/* CONFIG_HARD_SPI */