dm: Add support for scsi/sata based devices

All sata based drivers are bind and corresponding block
device is created. Based on this find_scsi_device() is able
to get back block device based on scsi_curr_dev pointer.

intr_scsi() is commented now but it can be replaced by calling
find_scsi_device() and scsi_scan().

scsi_dev_desc[] is commented out but common/scsi.c heavily depends on
it. That's why CONFIG_SYS_SCSI_MAX_DEVICE is hardcoded to 1 and symbol
is reassigned to a block description allocated by uclass.
There is only one block description by device now but it doesn't need to
be correct when more devices are present.

scsi_bind() ensures corresponding block device creation.
uclass post_probe (scsi_post_probe()) is doing low level init.

SCSI/SATA DM based drivers requires to have 64bit base address as
the first entry in platform data structure to setup mmio_base.

Signed-off-by: Michal Simek <michal.simek@xilinx.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
Series-changes: 2
- Use CONFIG_DM_SCSI instead of mix of DM_SCSI and DM_SATA
  Ceva sata has never used sata commands that's why keep it in
  SCSI part only.
- Separate scsi_scan() for DM_SCSI and do not change cmd/scsi.c
- Extend platdata

Series-changes: 3
- Fix scsi_scan return path
- Fix header location uclass-internal.h
- Add scsi_max_devs under !DM_SCSI
- Add new header device-internal because of device_probe()
- Redesign block device creation algorithm
- Use device_unbind in error path
- Create block device with id and lun numbers (lun was there in v2)
- Cleanup dev_num initialization in block device description
  with fixing parameters in blk_create_devicef
- Create new Kconfig menu for SATA/SCSI drivers
- Extend description for DM_SCSI
- Fix Kconfig dependencies
- Fix kernel doc format in scsi_platdata
- Fix ahci_init_one - vendor variable

Series-changes: 4
- Fix Kconfig entry
- Remove SPL ifdef around SCSI uclass
- Clean ahci_print_info() ifdef logic

4 files changed, 23 insertions, 2 deletions

diff --git a/include/ahci.h b/include/ahci.h
index a956c6ff5d..4876b41e90 100644
--- a/include/ahci.h
+++ b/include/ahci.h
@@ -145,7 +145,7 @@ struct ahci_ioports {
 };
 
 struct ahci_probe_ent {
-#ifdef CONFIG_DM_PCI
+#if defined(CONFIG_DM_PCI) || defined(CONFIG_DM_SCSI)
 	struct udevice *dev;
 #else
 	pci_dev_t	dev;
diff --git a/include/dm/uclass-id.h b/include/dm/uclass-id.h
index eb78c4dac4..8c92d0b030 100644
--- a/include/dm/uclass-id.h
+++ b/include/dm/uclass-id.h
@@ -66,6 +66,7 @@ enum uclass_id {
 	UCLASS_REMOTEPROC,	/* Remote Processor device */
 	UCLASS_RESET,		/* Reset controller device */
 	UCLASS_RTC,		/* Real time clock device */
+	UCLASS_SCSI,		/* SCSI device */
 	UCLASS_SERIAL,		/* Serial UART */
 	UCLASS_SPI,		/* SPI bus */
 	UCLASS_SPMI,		/* System Power Management Interface bus */
diff --git a/include/sata.h b/include/sata.h
index b35359aa5a..d18cc9aa87 100644
--- a/include/sata.h
+++ b/include/sata.h
@@ -2,6 +2,7 @@
 #define __SATA_H__
 #include <part.h>
 
+#if !defined(CONFIG_DM_SCSI)
 int init_sata(int dev);
 int reset_sata(int dev);
 int scan_sata(int dev);
@@ -15,5 +16,6 @@ int __sata_stop(void);
 int sata_port_status(int dev, int port);
 
 extern struct blk_desc sata_dev_desc[];
+#endif
 
 #endif
diff --git a/include/scsi.h b/include/scsi.h
index c8796785a4..190dacd0f2 100644
--- a/include/scsi.h
+++ b/include/scsi.h
@@ -166,8 +166,11 @@ typedef struct SCSI_cmd_block{
 void scsi_print_error(ccb *pccb);
 int scsi_exec(ccb *pccb);
 void scsi_bus_reset(void);
+#if !defined(CONFIG_DM_SCSI)
 void scsi_low_level_init(int busdevfunc);
-
+#else
+void scsi_low_level_init(int busdevfunc, struct udevice *dev);
+#endif
 
 /***************************************************************************
  * functions residing inside cmd_scsi.c
@@ -175,6 +178,21 @@ void scsi_low_level_init(int busdevfunc);
 void scsi_init(void);
 int scsi_scan(int mode);
 
+#if defined(CONFIG_DM_SCSI)
+/**
+ * struct scsi_platdata - stores information about SCSI controller
+ *
+ * @base: Controller base address
+ * @max_lun: Maximum number of logical units
+ * @max_id: Maximum number of target ids
+ */
+struct scsi_platdata {
+	unsigned long base;
+	unsigned long max_lun;
+	unsigned long max_id;
+};
+#endif
+
 #define SCSI_IDENTIFY					0xC0  /* not used */
 
 /* Hardware errors  */