drivers: block: dwc_ahci: Implement a driver for Synopsys DWC sata device

Implement a sata driver for Synopsys DWC sata device based on
U-boot driver model.

Signed-off-by: Mugunthan V N <mugunthanvnm@ti.com>
Signed-off-by: Jean-Jacques Hiblot <jjhiblot@ti.com>
Reviewed-by: Tom Rini <trini@konsulko.com>
Reviewed-by: Simon Glass <sjg@chromium.org>

diff --git a/drivers/block/Kconfig b/drivers/block/Kconfig
index 88e66e2377a9a2122672fec256b9cd797017a18c..6cbe1454b834f2c78cca60e431065d79e72f231e 100644 (file)
--- a/drivers/block/Kconfig
+++ b/drivers/block/Kconfig
@@ -48,4 +48,14 @@ config SATA_CEVA
          ZynqMP. Support up to 2 external devices. Complient with SATA 3.1 and
          AHCI 1.3 specifications with hot-plug detect feature.
 
+
+config DWC_AHCI
+       bool "Enable Synopsys DWC AHCI driver support"
+       select SCSI_AHCI
+       select PHY
+       depends on DM_SCSI
+       help
+         Enable this driver to support Sata devices through
+         Synopsys DWC AHCI module.
+
 endmenu

diff --git a/drivers/block/Makefile b/drivers/block/Makefile
index f415b3371bb720e829cc3e76f26aecfad70ccaef..d89c8b0574607e66c0a4bcb7527d7c7523465946 100644 (file)
--- a/drivers/block/Makefile
+++ b/drivers/block/Makefile
@@ -11,6 +11,7 @@ ifndef CONFIG_BLK
 obj-y += blk_legacy.o
 endif
 
+obj-$(CONFIG_DWC_AHCI) += dwc_ahci.o
 obj-$(CONFIG_AHCI) += ahci-uclass.o
 obj-$(CONFIG_DM_SCSI) += scsi-uclass.o
 obj-$(CONFIG_SCSI_AHCI) += ahci.o

diff --git a/drivers/block/dwc_ahci.c b/drivers/block/dwc_ahci.c
new file mode 100644 (file)
index 0000000..d5bb0b8
--- /dev/null
+++ b/drivers/block/dwc_ahci.c
@@ -0,0 +1,101 @@
+/*
+ * DWC SATA platform driver
+ *
+ * (C) Copyright 2016
+ *     Texas Instruments Incorporated, <www.ti.com>
+ *
+ * Author: Mugunthan V N <mugunthanvnm@ti.com>
+ *
+ * SPDX-License-Identifier:     GPL-2.0+
+ */
+
+#include <common.h>
+#include <dm.h>
+#include <ahci.h>
+#include <scsi.h>
+#include <sata.h>
+#include <asm/arch/sata.h>
+#include <asm/io.h>
+#include <generic-phy.h>
+
+DECLARE_GLOBAL_DATA_PTR;
+
+struct dwc_ahci_priv {
+       void *base;
+       void *wrapper_base;
+};
+
+static int dwc_ahci_ofdata_to_platdata(struct udevice *dev)
+{
+       struct dwc_ahci_priv *priv = dev_get_priv(dev);
+       struct scsi_platdata *plat = dev_get_platdata(dev);
+       fdt_addr_t addr;
+
+       plat->max_id = fdtdec_get_uint(gd->fdt_blob, dev->of_offset, "max-id",
+                                      CONFIG_SYS_SCSI_MAX_SCSI_ID);
+       plat->max_lun = fdtdec_get_uint(gd->fdt_blob, dev->of_offset,
+                                       "max-lun", CONFIG_SYS_SCSI_MAX_LUN);
+
+       priv->base = map_physmem(dev_get_addr(dev), sizeof(void *),
+                                MAP_NOCACHE);
+
+       addr = dev_get_addr_index(dev, 1);
+       if (addr != FDT_ADDR_T_NONE) {
+               priv->wrapper_base = map_physmem(addr, sizeof(void *),
+                                                MAP_NOCACHE);
+       } else {
+               priv->wrapper_base = NULL;
+       }
+
+       return 0;
+}
+
+static int dwc_ahci_probe(struct udevice *dev)
+{
+       struct dwc_ahci_priv *priv = dev_get_priv(dev);
+       int ret;
+       struct phy phy;
+
+       ret = generic_phy_get_by_name(dev, "sata-phy", &phy);
+       if (ret) {
+               error("can't get the phy from DT\n");
+               return ret;
+       }
+
+       ret = generic_phy_init(&phy);
+       if (ret) {
+               error("unable to initialize the sata phy\n");
+               return ret;
+       }
+
+       ret = generic_phy_power_on(&phy);
+       if (ret) {
+               error("unable to power on the sata phy\n");
+               return ret;
+       }
+
+       if (priv->wrapper_base) {
+               u32 val = TI_SATA_IDLE_NO | TI_SATA_STANDBY_NO;
+
+               /* Enable SATA module, No Idle, No Standby */
+               writel(val, priv->wrapper_base + TI_SATA_SYSCONFIG);
+       }
+
+       return ahci_init(priv->base);
+}
+
+static const struct udevice_id dwc_ahci_ids[] = {
+       { .compatible = "snps,dwc-ahci" },
+       { }
+};
+
+U_BOOT_DRIVER(dwc_ahci) = {
+       .name   = "dwc_ahci",
+       .id     = UCLASS_SCSI,
+       .of_match = dwc_ahci_ids,
+       .ofdata_to_platdata = dwc_ahci_ofdata_to_platdata,
+       .probe  = dwc_ahci_probe,
+       .priv_auto_alloc_size = sizeof(struct dwc_ahci_priv),
+       .platdata_auto_alloc_size = sizeof(struct scsi_platdata),
+       .flags = DM_FLAG_ALLOC_PRIV_DMA,
+};