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>

diff --git a/common/board_r.c b/common/board_r.c
index 5496f45..a373352 100644 (file)
--- 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 04add62..e7efa5a 100644 (file)
--- 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 fe5aa07..7b82ba6 100644 (file)
--- a/drivers/block/Kconfig
+++ b/drivers/block/Kconfig
@@ -19,6 +19,15 @@ 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 (Small Computer System Interface) uclass
+         which supports SCSI and SATA HDDs. For every device configuration
+         (IDs/LUNs) a block device is created with RAW read/write and
+         filesystem support.
+
 config BLOCK_CACHE
        bool "Use block device cache"
        default n
@@ -27,3 +36,7 @@ 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 436b79f..a72feec 100644 (file)
--- 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 5139989..3fa14a7 100644 (file)
--- 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)
        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 2e041c2..38cb938 100644 (file)
--- 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 (file)
index 0000000..05da6cd
--- /dev/null
+++ b/drivers/block/scsi-uclass.c
@@ -0,0 +1,27 @@
+/*
+ * Copyright (c) 2015 Google, Inc
+ * Written by Simon Glass <sjg@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>
+
+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,
+};

diff --git a/include/ahci.h b/include/ahci.h
index a956c6f..4876b41 100644 (file)
--- 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 eb78c4d..8c92d0b 100644 (file)
--- 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 b35359a..d18cc9a 100644 (file)
--- 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 c879678..190dacd 100644 (file)
--- 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  */