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 --- drivers/block/Kconfig | 10 +++++ drivers/block/Makefile | 1 + drivers/block/dwc_ahci.c | 100 +++++++++++++++++++++++++++++++++++++++++++++++ 3 files changed, 111 insertions(+) create mode 100644 drivers/block/dwc_ahci.c
diff --git a/drivers/block/Kconfig b/drivers/block/Kconfig index 88e66e2..b3d35bd 100644 --- 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 GENERIC_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 a72feec..cffe498 100644 --- 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 index 0000000..ca32841 --- /dev/null +++ b/drivers/block/dwc_ahci.c @@ -0,0 +1,100 @@ +/* + * 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 udevice *phy = dm_generic_phy_get(dev, "phys"); + + if (IS_ERR(phy)) { + error("can't get the phy from DT\n"); + return PTR_ERR(phy); + } + + 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, +};