dm: sata: Separate the non-command code into its own file

At present the SATA command code includes both the command-processing code
and the core SATA functions and data structures.

Separate the latter into its own file, adding functions as needed to avoid
the command code accessing data structures directly.

With this commit:
- All CONFIG option are referenced from the non-command code
- The concept of a 'current SATA device' is confined to the command code

This will make it easier to convert this code to driver model.

Signed-off-by: Simon Glass <sjg@chromium.org>

3 files changed, 107 insertions, 118 deletions

diff --git a/cmd/sata.c b/cmd/sata.c
index b1a64d9969..d18b5233e6 100644
--- a/cmd/sata.c
+++ b/cmd/sata.c
@@ -16,70 +16,6 @@
 #include <sata.h>
 
 static int sata_curr_device = -1;
-struct blk_desc sata_dev_desc[CONFIG_SYS_SATA_MAX_DEVICE];
-
-static unsigned long sata_bread(struct blk_desc *block_dev, lbaint_t start,
-				lbaint_t blkcnt, void *dst)
-{
-	return sata_read(block_dev->devnum, start, blkcnt, dst);
-}
-
-static unsigned long sata_bwrite(struct blk_desc *block_dev, lbaint_t start,
-				 lbaint_t blkcnt, const void *buffer)
-{
-	return sata_write(block_dev->devnum, start, blkcnt, buffer);
-}
-
-int __sata_initialize(void)
-{
-	int rc;
-	int i;
-
-	for (i = 0; i < CONFIG_SYS_SATA_MAX_DEVICE; i++) {
-		memset(&sata_dev_desc[i], 0, sizeof(struct blk_desc));
-		sata_dev_desc[i].if_type = IF_TYPE_SATA;
-		sata_dev_desc[i].devnum = i;
-		sata_dev_desc[i].part_type = PART_TYPE_UNKNOWN;
-		sata_dev_desc[i].type = DEV_TYPE_HARDDISK;
-		sata_dev_desc[i].lba = 0;
-		sata_dev_desc[i].blksz = 512;
-		sata_dev_desc[i].log2blksz = LOG2(sata_dev_desc[i].blksz);
-		sata_dev_desc[i].block_read = sata_bread;
-		sata_dev_desc[i].block_write = sata_bwrite;
-
-		rc = init_sata(i);
-		if (!rc) {
-			rc = scan_sata(i);
-			if (!rc && (sata_dev_desc[i].lba > 0) &&
-				(sata_dev_desc[i].blksz > 0))
-				part_init(&sata_dev_desc[i]);
-		}
-	}
-	sata_curr_device = 0;
-	return rc;
-}
-int sata_initialize(void) __attribute__((weak,alias("__sata_initialize")));
-
-__weak int __sata_stop(void)
-{
-	int i, err = 0;
-
-	for (i = 0; i < CONFIG_SYS_SATA_MAX_DEVICE; i++)
-		err |= reset_sata(i);
-
-	if (err)
-		printf("Could not reset some SATA devices\n");
-
-	return err;
-}
-int sata_stop(void) __attribute__((weak, alias("__sata_stop")));
-
-#ifdef CONFIG_PARTITIONS
-struct blk_desc *sata_get_dev(int dev)
-{
-	return (dev < CONFIG_SYS_SATA_MAX_DEVICE) ? &sata_dev_desc[dev] : NULL;
-}
-#endif
 
 static int do_sata(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
 {
@@ -106,70 +42,39 @@ static int do_sata(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
 		return CMD_RET_USAGE;
 	case 2:
 		if (strncmp(argv[1], "inf", 3) == 0) {
-			int i;
-
-			putc('\n');
-			for (i = 0; i < CONFIG_SYS_SATA_MAX_DEVICE; ++i) {
-				if (sata_dev_desc[i].type == DEV_TYPE_UNKNOWN)
-					continue;
-				printf("SATA device %d: ", i);
-				dev_print(&sata_dev_desc[i]);
-			}
+			blk_list_devices(IF_TYPE_SATA);
 			return 0;
 		} else if (strncmp(argv[1], "dev", 3) == 0) {
-			if (sata_curr_device < 0 ||
-			    sata_curr_device >= CONFIG_SYS_SATA_MAX_DEVICE) {
-				puts("\nno SATA devices available\n");
-				return 1;
+			if (blk_print_device_num(IF_TYPE_SATA,
+						 sata_curr_device)) {
+				printf("\nno SATA devices available\n");
+				return CMD_RET_FAILURE;
 			}
-			printf("\nSATA device %d: ", sata_curr_device);
-			dev_print(&sata_dev_desc[sata_curr_device]);
 			return 0;
 		} else if (strncmp(argv[1], "part", 4) == 0) {
-			int dev, ok;
-
-			for (ok = 0, dev = 0; dev < CONFIG_SYS_SATA_MAX_DEVICE; ++dev) {
-				if (sata_dev_desc[dev].part_type != PART_TYPE_UNKNOWN) {
-					++ok;
-					if (dev)
-						putc ('\n');
-					part_print(&sata_dev_desc[dev]);
-				}
-			}
-			if (!ok) {
+			if (blk_list_part(IF_TYPE_SATA))
 				puts("\nno SATA devices available\n");
-				rc ++;
-			}
-			return rc;
+			return 0;
 		}
 		return CMD_RET_USAGE;
 	case 3:
 		if (strncmp(argv[1], "dev", 3) == 0) {
 			int dev = (int)simple_strtoul(argv[2], NULL, 10);
 
-			printf("\nSATA device %d: ", dev);
-			if (dev >= CONFIG_SYS_SATA_MAX_DEVICE) {
-				puts ("unknown device\n");
-				return 1;
+			if (!blk_show_device(IF_TYPE_SATA, dev)) {
+				sata_curr_device = dev;
+				printf("... is now current device\n");
+			} else {
+				return CMD_RET_FAILURE;
 			}
-			dev_print(&sata_dev_desc[dev]);
-
-			if (sata_dev_desc[dev].type == DEV_TYPE_UNKNOWN)
-				return 1;
-
-			sata_curr_device = dev;
-
-			puts("... is now current device\n");
-
 			return 0;
 		} else if (strncmp(argv[1], "part", 4) == 0) {
 			int dev = (int)simple_strtoul(argv[2], NULL, 10);
 
-			if (sata_dev_desc[dev].part_type != PART_TYPE_UNKNOWN) {
-				part_print(&sata_dev_desc[dev]);
-			} else {
-				printf("\nSATA device %d not available\n", dev);
-				rc = 1;
+			if (blk_print_part_devnum(IF_TYPE_SATA, dev)) {
+				printf("\nSATA device %d not available\n",
+				       dev);
+				return CMD_RET_FAILURE;
 			}
 			return rc;
 		}
@@ -185,11 +90,8 @@ static int do_sata(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
 			printf("\nSATA read: device %d block # %ld, count %ld ... ",
 				sata_curr_device, blk, cnt);
 
-			n = blk_dread(&sata_dev_desc[sata_curr_device],
-				      blk, cnt, (u32 *)addr);
-
-			/* flush cache after read */
-			flush_cache(addr, cnt * sata_dev_desc[sata_curr_device].blksz);
+			n = blk_read_devnum(IF_TYPE_SATA, sata_curr_device, blk,
+					    cnt, (ulong *)addr);
 
 			printf("%ld blocks read: %s\n",
 				n, (n==cnt) ? "OK" : "ERROR");
@@ -204,8 +106,8 @@ static int do_sata(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
 			printf("\nSATA write: device %d block # %ld, count %ld ... ",
 				sata_curr_device, blk, cnt);
 
-			n = blk_dwrite(&sata_dev_desc[sata_curr_device],
-				       blk, cnt, (u32 *)addr);
+			n = blk_write_devnum(IF_TYPE_SATA, sata_curr_device,
+					     blk, cnt, (ulong *)addr);
 
 			printf("%ld blocks written: %s\n",
 				n, (n == cnt) ? "OK" : "ERROR");
diff --git a/common/Makefile b/common/Makefile
index 1df5add325..f9b26b7bbe 100644
--- a/common/Makefile
+++ b/common/Makefile
@@ -84,6 +84,7 @@ obj-$(CONFIG_LCD_ROTATION) += lcd_console_rotation.o
 obj-$(CONFIG_LCD_DT_SIMPLEFB) += lcd_simplefb.o
 obj-$(CONFIG_LYNXKDI) += lynxkdi.o
 obj-$(CONFIG_MENU) += menu.o
+obj-$(CONFIG_CMD_SATA) += sata.o
 obj-$(CONFIG_SCSI) += scsi.o
 obj-$(CONFIG_UPDATE_TFTP) += update.o
 obj-$(CONFIG_DFU_TFTP) += update.o
diff --git a/common/sata.c b/common/sata.c
new file mode 100644
index 0000000000..1d52fcb2dc
--- /dev/null
+++ b/common/sata.c
@@ -0,0 +1,86 @@
+/*
+ * Copyright (C) 2000-2005, DENX Software Engineering
+ *		Wolfgang Denk <wd@denx.de>
+ * Copyright (C) Procsys. All rights reserved.
+ *		Mushtaq Khan <mushtaq_k@procsys.com>
+ *			<mushtaqk_921@yahoo.co.in>
+ * Copyright (C) 2008 Freescale Semiconductor, Inc.
+ *		Dave Liu <daveliu@freescale.com>
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#include <common.h>
+#include <sata.h>
+
+struct blk_desc sata_dev_desc[CONFIG_SYS_SATA_MAX_DEVICE];
+
+#ifdef CONFIG_PARTITIONS
+struct blk_desc *sata_get_dev(int dev)
+{
+	return (dev < CONFIG_SYS_SATA_MAX_DEVICE) ? &sata_dev_desc[dev] : NULL;
+}
+#endif
+
+static unsigned long sata_bread(struct blk_desc *block_dev, lbaint_t start,
+				lbaint_t blkcnt, void *dst)
+{
+	return sata_read(block_dev->devnum, start, blkcnt, dst);
+}
+
+static unsigned long sata_bwrite(struct blk_desc *block_dev, lbaint_t start,
+				 lbaint_t blkcnt, const void *buffer)
+{
+	return sata_write(block_dev->devnum, start, blkcnt, buffer);
+}
+
+int __sata_initialize(void)
+{
+	int rc;
+	int i;
+
+	for (i = 0; i < CONFIG_SYS_SATA_MAX_DEVICE; i++) {
+		memset(&sata_dev_desc[i], 0, sizeof(struct blk_desc));
+		sata_dev_desc[i].if_type = IF_TYPE_SATA;
+		sata_dev_desc[i].devnum = i;
+		sata_dev_desc[i].part_type = PART_TYPE_UNKNOWN;
+		sata_dev_desc[i].type = DEV_TYPE_HARDDISK;
+		sata_dev_desc[i].lba = 0;
+		sata_dev_desc[i].blksz = 512;
+		sata_dev_desc[i].log2blksz = LOG2(sata_dev_desc[i].blksz);
+		sata_dev_desc[i].block_read = sata_bread;
+		sata_dev_desc[i].block_write = sata_bwrite;
+
+		rc = init_sata(i);
+		if (!rc) {
+			rc = scan_sata(i);
+			if (!rc && sata_dev_desc[i].lba > 0 &&
+			    sata_dev_desc[i].blksz > 0)
+				part_init(&sata_dev_desc[i]);
+		}
+	}
+
+	return rc;
+}
+int sata_initialize(void) __attribute__((weak, alias("__sata_initialize")));
+
+__weak int __sata_stop(void)
+{
+	int i, err = 0;
+
+	for (i = 0; i < CONFIG_SYS_SATA_MAX_DEVICE; i++)
+		err |= reset_sata(i);
+
+	if (err)
+		printf("Could not reset some SATA devices\n");
+
+	return err;
+}
+int sata_stop(void) __attribute__((weak, alias("__sata_stop")));
+
+U_BOOT_LEGACY_BLK(sata) = {
+	.if_typename	= "sata",
+	.if_type	= IF_TYPE_SATA,
+	.max_devs	= CONFIG_SYS_SATA_MAX_DEVICE,
+	.desc		= sata_dev_desc,
+};