2012/2/2 Vinayak Holikatti <vinholikatti@xxxxxxxxx>: > From: Santosh Yaraganavi <santoshsy@xxxxxxxxx> > > UFS is designed to be the most advanced specification for > both embedded and removable flash memory-based storage in mobile devices > such as smart phones and tablet computers. The UFS standard represents > an evolutionary progression of JEDEC standards in this field, and has been > specifically tailored for mobile applications and computing systems requiring > high performance and low power consumption. The initial data throughput for > UFS will be ~300 megabytes per second (MB/s), and the standard also supports > command queuing features to raise random read/write speeds. > > To achieve the highest performance and most power efficient data > transport, UFS uses the leading industry interface standards to form its > Interconnect Layer: MIPI® Alliance’s M-PHY and UniProSM specifications. > UniPro is a comprehensive specification meant to act as a universal > chip-to-chip protocol, providing a common tunnel for other protocols. > The M-PHY interface is designed as the primary physical interface (PHY layer) > for the UniPro specification, and is a high speed serial interface targeting > up to 2.9 gigabits per second (Gbps) per lane with up-scalability to 5.8Gbps > per lane. > > MIPI’s M-PHY and UniPro specifications are optimized for mobile applications, > and are designed from the ground up for efficient power management in mobile > devices, including enabling efficient transitions between the active and power > save modes. Combined with a low active power level and a near-zero idle power > level, UFS offers the promise for significant reductions in device power > consumption. > > The UFS standard adopts the well-known SCSI Architecture Model and command > protocols supporting multiple commands with command queuing features and > enabling a multi-thread programming paradigm. This differs from conventional > flash-based memory cards and embedded flash solutions which process one > command at a time, limiting random read/write access performance. > In addition, a forthcoming complementary UFS Host Controller Interface (HCI) > specification will allow system designers greater flexibility by simplifying > the involvement of the host processor in the operation of the flash storage > subsystem. The UFS HCI specification and the adoption of SCSI will provide > a well-known software programming model and enable wider market adoption. > > This patchset contains PCIe based UFS host controller driver which complies > to UFSHCI 1.0 and 1.1. The driver is based on Linux SCSI framework. > The driver is tested with UFS Host controller(FPGA) and UFS device(FPGA). > > This patch set is successfully applied on kernel version 3.3-rc2. > > Santosh Yaraganavi (4): > [SCSI] ufshcd: UFS Host controller driver > [SCSI] ufshcd: UFS UTP Transfer requests handling > [SCSI] ufshcd: UFSHCI error handling > [SCSI] ufshcd: SCSI error handling > > drivers/scsi/Kconfig | 1 + > drivers/scsi/Makefile | 1 + > drivers/scsi/ufs/Kconfig | 49 ++ > drivers/scsi/ufs/Makefile | 2 + > drivers/scsi/ufs/ufs.h | 203 +++++ > drivers/scsi/ufs/ufshcd.c | 1954 +++++++++++++++++++++++++++++++++++++++++++++ > drivers/scsi/ufs/ufshci.h | 360 +++++++++ > 7 files changed, 2570 insertions(+), 0 deletions(-) > create mode 100644 drivers/scsi/ufs/Kconfig > create mode 100644 drivers/scsi/ufs/Makefile > create mode 100644 drivers/scsi/ufs/ufs.h > create mode 100644 drivers/scsi/ufs/ufshcd.c > create mode 100644 drivers/scsi/ufs/ufshci.h > > -- > 1.7.5.4 Hi. I have been waiting for ufs contribution. Unfortunately I don't have real target supported ufs(maybe only you have it). I can not debug and run this code, So just review only code with specification. > > -- > To unsubscribe from this list: send the line "unsubscribe linux-kernel" in > the body of a message to majordomo@xxxxxxxxxxxxxxx > More majordomo info at http://vger.kernel.org/majordomo-info.html > Please read the FAQ at http://www.tux.org/lkml/ -- To unsubscribe from this list: send the line "unsubscribe linux-samsung-soc" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
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