[U-Boot] [PATCH v3 1/2] dm: Add support for scsi/sata based devices
Michal Simek
michal.simek at xilinx.com
Wed Nov 30 21:48:11 CET 2016
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 at xilinx.com>
---
Changes in v3:
- 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
Changes in v2:
- 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
common/board_r.c | 4 +--
common/scsi.c | 76 +++++++++++++++++++++++++++++++++++++++++++++
drivers/block/Kconfig | 12 +++++++
drivers/block/Makefile | 1 +
drivers/block/ahci.c | 30 +++++++++++++-----
drivers/block/blk-uclass.c | 2 +-
drivers/block/scsi-uclass.c | 29 +++++++++++++++++
include/ahci.h | 2 +-
include/dm/uclass-id.h | 1 +
include/sata.h | 2 ++
include/scsi.h | 20 +++++++++++-
11 files changed, 166 insertions(+), 13 deletions(-)
create mode 100644 drivers/block/scsi-uclass.c
diff --git a/common/board_r.c b/common/board_r.c
index d959ad3c6f90..108cabbd023b 100644
--- a/common/board_r.c
+++ b/common/board_r.c
@@ -620,7 +620,7 @@ static int initr_ambapp_print(void)
}
#endif
-#if defined(CONFIG_SCSI)
+#if defined(CONFIG_SCSI) && !defined(CONFIG_DM_SCSI)
static int initr_scsi(void)
{
puts("SCSI: ");
@@ -923,7 +923,7 @@ init_fnc_t init_sequence_r[] = {
initr_ambapp_print,
#endif
#endif
-#ifdef CONFIG_SCSI
+#if defined(CONFIG_SCSI) && !defined(CONFIG_DM_SCSI)
INIT_FUNC_WATCHDOG_RESET
initr_scsi,
#endif
diff --git a/common/scsi.c b/common/scsi.c
index 04add624958f..e7efa5ae797c 100644
--- a/common/scsi.c
+++ b/common/scsi.c
@@ -10,7 +10,10 @@
#include <inttypes.h>
#include <pci.h>
#include <scsi.h>
+#include <dm/device-internal.h>
+#include <dm/uclass-internal.h>
+#if !defined(CONFIG_DM_SCSI)
#ifdef CONFIG_SCSI_DEV_LIST
#define SCSI_DEV_LIST CONFIG_SCSI_DEV_LIST
#else
@@ -31,6 +34,7 @@
#endif
#define SCSI_DEV_LIST {SCSI_VEND_ID, SCSI_DEV_ID}
#endif
+#endif
#if defined(CONFIG_PCI) && !defined(CONFIG_SCSI_AHCI_PLAT)
const struct pci_device_id scsi_device_list[] = { SCSI_DEV_LIST };
@@ -39,11 +43,13 @@ static ccb tempccb; /* temporary scsi command buffer */
static unsigned char tempbuff[512]; /* temporary data buffer */
+#if !defined(CONFIG_DM_SCSI)
static int scsi_max_devs; /* number of highest available scsi device */
static int scsi_curr_dev; /* current device */
static struct blk_desc scsi_dev_desc[CONFIG_SYS_SCSI_MAX_DEVICE];
+#endif
/* almost the maximum amount of the scsi_ext command.. */
#define SCSI_MAX_READ_BLK 0xFFFF
@@ -444,6 +450,7 @@ static void scsi_init_dev_desc_priv(struct blk_desc *dev_desc)
#endif
}
+#if !defined(CONFIG_DM_SCSI)
/**
* scsi_init_dev_desc - initialize all SCSI specific blk_desc properties
*
@@ -460,6 +467,7 @@ static void scsi_init_dev_desc(struct blk_desc *dev_desc, int devnum)
scsi_init_dev_desc_priv(dev_desc);
}
+#endif
/**
* scsi_detect_dev - Detect scsi device
@@ -540,6 +548,73 @@ removable:
* (re)-scan the scsi bus and reports scsi device info
* to the user if mode = 1
*/
+#if defined(CONFIG_DM_SCSI)
+int scsi_scan(int mode)
+{
+ unsigned char i, lun;
+ struct uclass *uc;
+ struct udevice *dev; /* SCSI controller */
+ int ret;
+
+ if (mode == 1)
+ printf("scanning bus for devices...\n");
+
+ ret = uclass_get(UCLASS_SCSI, &uc);
+ if (ret)
+ return ret;
+
+ uclass_foreach_dev(dev, uc) {
+ struct scsi_platdata *plat; /* scsi controller platdata */
+
+ /* probe SCSI controller driver */
+ ret = device_probe(dev);
+ if (ret)
+ return ret;
+
+ /* Get controller platdata */
+ plat = dev_get_platdata(dev);
+
+ for (i = 0; i < plat->max_id; i++) {
+ for (lun = 0; lun < plat->max_lun; lun++) {
+ struct udevice *bdev; /* block device */
+ /* block device description */
+ struct blk_desc *bdesc;
+ char str[10];
+
+ /*
+ * Create only one block device and do detection
+ * to make sure that there won't be a lot of
+ * block devices created
+ */
+ snprintf(str, sizeof(str), "id%dlun%d", i, lun);
+ ret = blk_create_devicef(dev, "scsi_blk",
+ str, IF_TYPE_SCSI,
+ -1, 0, 0, &bdev);
+ if (ret) {
+ debug("Can't create device\n");
+ return ret;
+ }
+ bdesc = dev_get_uclass_platdata(bdev);
+
+ scsi_init_dev_desc_priv(bdesc);
+ bdesc->lun = lun;
+ ret = scsi_detect_dev(i, bdesc);
+ if (ret) {
+ device_unbind(bdev);
+ continue;
+ }
+
+ if (mode == 1) {
+ printf(" Device %d: ", 0);
+ dev_print(bdesc);
+ } /* if mode */
+ } /* next LUN */
+ }
+ }
+
+ return 0;
+}
+#else
int scsi_scan(int mode)
{
unsigned char i, lun;
@@ -576,6 +651,7 @@ int scsi_scan(int mode)
#endif
return 0;
}
+#endif
#ifdef CONFIG_BLK
static const struct blk_ops scsi_blk_ops = {
diff --git a/drivers/block/Kconfig b/drivers/block/Kconfig
index fe5aa07f921a..ecca1ef44636 100644
--- a/drivers/block/Kconfig
+++ b/drivers/block/Kconfig
@@ -19,6 +19,14 @@ config AHCI
operations at present. The block device interface has not been converted
to driver model.
+config DM_SCSI
+ bool "Support SCSI controllers with driver model"
+ depends on BLK
+ help
+ This option enables the SCSI uclass which supports SCSI and SATA HDDs.
+ For every device configuration (IDs/LUNs) is created block device
+ with RAW read/write and filesystem support.
+
config BLOCK_CACHE
bool "Use block device cache"
default n
@@ -27,3 +35,7 @@ config BLOCK_CACHE
This is most useful when accessing filesystems under U-Boot since
it will prevent repeated reads from directory structures and other
filesystem data structures.
+
+menu "SATA/SCSI device support"
+
+endmenu
diff --git a/drivers/block/Makefile b/drivers/block/Makefile
index 436b79f98165..a72feecd5456 100644
--- a/drivers/block/Makefile
+++ b/drivers/block/Makefile
@@ -12,6 +12,7 @@ obj-y += blk_legacy.o
endif
obj-$(CONFIG_AHCI) += ahci-uclass.o
+obj-$(CONFIG_DM_SCSI) += scsi-uclass.o
obj-$(CONFIG_SCSI_AHCI) += ahci.o
obj-$(CONFIG_DWC_AHSATA) += dwc_ahsata.o
obj-$(CONFIG_FSL_SATA) += fsl_sata.o
diff --git a/drivers/block/ahci.c b/drivers/block/ahci.c
index 5139989d0b5f..d419855bd845 100644
--- a/drivers/block/ahci.c
+++ b/drivers/block/ahci.c
@@ -168,7 +168,7 @@ int ahci_reset(void __iomem *base)
static int ahci_host_init(struct ahci_probe_ent *probe_ent)
{
-#ifndef CONFIG_SCSI_AHCI_PLAT
+#if !defined(CONFIG_SCSI_AHCI_PLAT) && !defined(CONFIG_DM_SCSI)
# ifdef CONFIG_DM_PCI
struct udevice *dev = probe_ent->dev;
struct pci_child_platdata *pplat = dev_get_parent_platdata(dev);
@@ -198,7 +198,7 @@ static int ahci_host_init(struct ahci_probe_ent *probe_ent)
writel(cap_save, mmio + HOST_CAP);
writel_with_flush(0xf, mmio + HOST_PORTS_IMPL);
-#ifndef CONFIG_SCSI_AHCI_PLAT
+#if !defined(CONFIG_SCSI_AHCI_PLAT) && !defined(CONFIG_DM_SCSI)
# ifdef CONFIG_DM_PCI
if (pplat->vendor == PCI_VENDOR_ID_INTEL) {
u16 tmp16;
@@ -327,6 +327,7 @@ static int ahci_host_init(struct ahci_probe_ent *probe_ent)
writel(tmp | HOST_IRQ_EN, mmio + HOST_CTL);
tmp = readl(mmio + HOST_CTL);
debug("HOST_CTL 0x%x\n", tmp);
+#if !defined(CONFIG_DM_SCSI)
#ifndef CONFIG_SCSI_AHCI_PLAT
# ifdef CONFIG_DM_PCI
dm_pci_read_config16(dev, PCI_COMMAND, &tmp16);
@@ -338,14 +339,15 @@ static int ahci_host_init(struct ahci_probe_ent *probe_ent)
pci_write_config_word(pdev, PCI_COMMAND, tmp16);
# endif
#endif
+#endif
return 0;
}
static void ahci_print_info(struct ahci_probe_ent *probe_ent)
{
-#ifndef CONFIG_SCSI_AHCI_PLAT
-# ifdef CONFIG_DM_PCI
+#if !defined(CONFIG_SCSI_AHCI_PLAT) && !defined(CONFIG_DM_SCSI)
+# if defined(CONFIG_DM_PCI) || defined(CONFIG_DM_SCSI)
struct udevice *dev = probe_ent->dev;
# else
pci_dev_t pdev = probe_ent->dev;
@@ -372,7 +374,7 @@ static void ahci_print_info(struct ahci_probe_ent *probe_ent)
else
speed_s = "?";
-#ifdef CONFIG_SCSI_AHCI_PLAT
+#if defined(CONFIG_SCSI_AHCI_PLAT) || defined(CONFIG_DM_SCSI)
scc_s = "SATA";
#else
# ifdef CONFIG_DM_PCI
@@ -424,13 +426,15 @@ static void ahci_print_info(struct ahci_probe_ent *probe_ent)
}
#ifndef CONFIG_SCSI_AHCI_PLAT
-# ifdef CONFIG_DM_PCI
+# if defined(CONFIG_DM_PCI) || defined(CONFIG_DM_SCSI)
static int ahci_init_one(struct udevice *dev)
# else
static int ahci_init_one(pci_dev_t dev)
# endif
{
+#if !defined(CONFIG_DM_SCSI)
u16 vendor;
+#endif
int rc;
probe_ent = malloc(sizeof(struct ahci_probe_ent));
@@ -450,6 +454,7 @@ static int ahci_init_one(pci_dev_t dev)
probe_ent->pio_mask = 0x1f;
probe_ent->udma_mask = 0x7f; /*Fixme,assume to support UDMA6 */
+#if !defined(CONFIG_DM_SCSI)
#ifdef CONFIG_DM_PCI
probe_ent->mmio_base = dm_pci_map_bar(dev, PCI_BASE_ADDRESS_5,
PCI_REGION_MEM);
@@ -473,6 +478,10 @@ static int ahci_init_one(pci_dev_t dev)
if (vendor == 0x197b)
pci_write_config_byte(dev, 0x41, 0xa1);
#endif
+#else
+ struct scsi_platdata *plat = dev_get_platdata(dev);
+ probe_ent->mmio_base = (void *)plat->base;
+#endif
debug("ahci mmio_base=0x%p\n", probe_ent->mmio_base);
/* initialize adapter */
@@ -954,14 +963,17 @@ int scsi_exec(ccb *pccb)
}
-
+#if defined(CONFIG_DM_SCSI)
+void scsi_low_level_init(int busdevfunc, struct udevice *dev)
+#else
void scsi_low_level_init(int busdevfunc)
+#endif
{
int i;
u32 linkmap;
#ifndef CONFIG_SCSI_AHCI_PLAT
-# ifdef CONFIG_DM_PCI
+# if defined(CONFIG_DM_PCI)
struct udevice *dev;
int ret;
@@ -969,6 +981,8 @@ void scsi_low_level_init(int busdevfunc)
if (ret)
return;
ahci_init_one(dev);
+# elif defined(CONFIG_DM_SCSI)
+ ahci_init_one(dev);
# else
ahci_init_one(busdevfunc);
# endif
diff --git a/drivers/block/blk-uclass.c b/drivers/block/blk-uclass.c
index 2e041c2b3dc7..38cb9388da6f 100644
--- a/drivers/block/blk-uclass.c
+++ b/drivers/block/blk-uclass.c
@@ -26,7 +26,7 @@ static const char *if_typename_str[IF_TYPE_COUNT] = {
static enum uclass_id if_type_uclass_id[IF_TYPE_COUNT] = {
[IF_TYPE_IDE] = UCLASS_INVALID,
- [IF_TYPE_SCSI] = UCLASS_INVALID,
+ [IF_TYPE_SCSI] = UCLASS_SCSI,
[IF_TYPE_ATAPI] = UCLASS_INVALID,
[IF_TYPE_USB] = UCLASS_MASS_STORAGE,
[IF_TYPE_DOC] = UCLASS_INVALID,
diff --git a/drivers/block/scsi-uclass.c b/drivers/block/scsi-uclass.c
new file mode 100644
index 000000000000..123b25c406a4
--- /dev/null
+++ b/drivers/block/scsi-uclass.c
@@ -0,0 +1,29 @@
+/*
+ * Copyright (c) 2015 Google, Inc
+ * Written by Simon Glass <sjg at chromium.org>
+ * Copyright (c) 2016 Xilinx, Inc
+ * Written by Michal Simek
+ *
+ * Based on ahci-uclass.c
+ *
+ * SPDX-License-Identifier: GPL-2.0+
+ */
+
+#include <common.h>
+#include <dm.h>
+#include <scsi.h>
+
+#if !defined(CONFIG_SPL_BUILD)
+static int scsi_post_probe(struct udevice *dev)
+{
+ debug("%s: device %p\n", __func__, dev);
+ scsi_low_level_init(0, dev);
+ return 0;
+}
+
+UCLASS_DRIVER(scsi) = {
+ .id = UCLASS_SCSI,
+ .name = "scsi",
+ .post_probe = scsi_post_probe,
+};
+#endif
diff --git a/include/ahci.h b/include/ahci.h
index a956c6ff5df7..4876b41e9010 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 eb78c4dac485..8c92d0b03088 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 b35359aa5a19..d18cc9aa8754 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 c8796785a465..190dacd0f2ec 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 */
--
1.9.1
More information about the U-Boot
mailing list