[PATCH] ata: new driver to support the internal sata controller on Armada-XP
Sascha Hauer
s.hauer at pengutronix.de
Thu Feb 23 23:20:10 PST 2017
On Thu, Jan 26, 2017 at 11:01:59AM +0100, Uwe Kleine-König wrote:
> Signed-off-by: Uwe Kleine-König <u.kleine-koenig at pengutronix.de>
> ---
> drivers/ata/Kconfig | 5 ++
> drivers/ata/Makefile | 1 +
> drivers/ata/sata_mv.c | 126 ++++++++++++++++++++++++++++++++++++++++++++++++++
> 3 files changed, 132 insertions(+)
> create mode 100644 drivers/ata/sata_mv.c
I also think that it's better to have a driver that does the
initialization than to do in board specific code where it gets
duplicated from board to board.
Applied this patch.
Sascha
>
> diff --git a/drivers/ata/Kconfig b/drivers/ata/Kconfig
> index 7850e4a9c967..0234c66c8ec8 100644
> --- a/drivers/ata/Kconfig
> +++ b/drivers/ata/Kconfig
> @@ -42,6 +42,11 @@ config DISK_AHCI_IMX
> depends on DISK_AHCI
> bool "i.MX AHCI support"
>
> +config DISK_SATA_MV
> + depends on ARCH_MVEBU
> + select DISK_IDE_SFF
> + bool "Marvell SATA support"
> +
> comment "interface types"
>
> config DISK_INTF_PLATFORM_IDE
> diff --git a/drivers/ata/Makefile b/drivers/ata/Makefile
> index c444c4d1962e..6b83ae2ef542 100644
> --- a/drivers/ata/Makefile
> +++ b/drivers/ata/Makefile
> @@ -5,6 +5,7 @@ obj-$(CONFIG_DISK_IDE_SFF) += ide-sff.o
> obj-$(CONFIG_DISK_ATA) += disk_ata_drive.o
> obj-$(CONFIG_DISK_AHCI) += ahci.o
> obj-$(CONFIG_DISK_AHCI_IMX) += sata-imx.o
> +obj-$(CONFIG_DISK_SATA_MV) += sata_mv.o
>
> # interface types
>
> diff --git a/drivers/ata/sata_mv.c b/drivers/ata/sata_mv.c
> new file mode 100644
> index 000000000000..22b29d08a579
> --- /dev/null
> +++ b/drivers/ata/sata_mv.c
> @@ -0,0 +1,126 @@
> +#include <common.h>
> +#include <clock.h>
> +#include <driver.h>
> +#include <init.h>
> +#include <ata_drive.h>
> +
> +#include <asm/io.h>
> +
> +/* This can/should be moved to a more generic place */
> +static void ata_ioports_init(struct ata_ioports *io,
> + void *base_data, void *base_reg, void *base_alt,
> + unsigned stride)
> +{
> + /* io->cmd_addr is unused */;
> + io->data_addr = base_data;
> + io->error_addr = base_reg + 1 * stride;
> + /* io->feature_addr is unused */
> + io->nsect_addr = base_reg + 2 * stride;
> + io->lbal_addr = base_reg + 3 * stride;
> + io->lbam_addr = base_reg + 4 * stride;
> + io->lbah_addr = base_reg + 5 * stride;
> + io->device_addr = base_reg + 6 * stride;
> + io->status_addr = base_reg + 7 * stride;
> + io->command_addr = base_reg + 7 * stride;
> + /* io->altstatus_addr is unused */
> +
> + if (base_alt)
> + io->ctl_addr = base_alt;
> + else
> + io->ctl_addr = io->status_addr;
> +
> + /* io->alt_dev_addr is unused */
> +}
> +
> +#define REG_WINDOW_CONTROL(n) ((n) * 0x10 + 0x30)
> +#define REG_WINDOW_BASE(n) ((n) * 0x10 + 0x34)
> +
> +#define REG_EDMA_COMMAND(n) ((n) * 0x2000 + 0x2028)
> +#define REG_EDMA_COMMAND__EATARST 0x00000004
> +
> +#define REG_ATA_BASE 0x2100
> +#define REG_SSTATUS(n) ((n) * 0x2000 + 0x2300)
> +#define REG_SCONTROL(n) ((n) * 0x2000 + 0x2308)
> +#define REG_SCONTROL__DET 0x0000000f
> +#define REG_SCONTROL__DET__INIT 0x00000001
> +#define REG_SCONTROL__DET__PHYOK 0x00000002
> +#define REG_SCONTROL__IPM 0x00000f00
> +#define REG_SCONTROL__IPM__PARTIAL 0x00000100
> +#define REG_SCONTROL__IPM__SLUMBER 0x00000200
> +
> +static int mv_sata_probe(struct device_d *dev)
> +{
> + struct resource *iores;
> + void __iomem *base;
> + struct ide_port *ide;
> + u32 scontrol;
> + int ret, i;
> +
> + iores = dev_request_mem_resource(dev, 0);
> + if (IS_ERR(iores)) {
> + dev_err(dev, "Failed to request mem resources\n");
> + return PTR_ERR(iores);
> + }
> + base = IOMEM(iores->start);
> +
> + /* disable MBus windows */
> + for (i = 0; i < 4; ++i) {
> + writel(0, base + REG_WINDOW_CONTROL(i));
> + writel(0, base + REG_WINDOW_BASE(i));
> + }
> +
> + /* enable first window */
> + writel(0x7fff0e01, base + REG_WINDOW_CONTROL(0));
> + writel(0, base + REG_WINDOW_BASE(0));
> +
> + writel(REG_EDMA_COMMAND__EATARST, base + REG_EDMA_COMMAND(0));
> + udelay(25);
> + writel(0x0, base + REG_EDMA_COMMAND(0));
> +
> + scontrol = readl(base + REG_SCONTROL(0));
> + scontrol &= ~(REG_SCONTROL__DET | REG_SCONTROL__IPM);
> + /* disable power management */
> + scontrol |= REG_SCONTROL__IPM__PARTIAL | REG_SCONTROL__IPM__SLUMBER;
> +
> + /* perform interface communication initialization */
> + writel(scontrol | REG_SCONTROL__DET__INIT, base + REG_SCONTROL(0));
> + writel(scontrol, base + REG_SCONTROL(0));
> +
> + ret = wait_on_timeout(10 * MSECOND,
> + (readl(base + REG_SSTATUS(0)) & REG_SCONTROL__DET) == (REG_SCONTROL__DET__INIT | REG_SCONTROL__DET__PHYOK));
> + if (ret) {
> + dev_err(dev, "Failed to wait for phy (sstatus=0x%08x)\n",
> + readl(base + REG_SSTATUS(0)));
> + return ret;
> + }
> +
> + ide = xzalloc(sizeof(*ide));
> +
> + ide->port.dev = dev;
> +
> + ata_ioports_init(&ide->io, base + REG_ATA_BASE, base + REG_ATA_BASE,
> + NULL, 4);
> +
> + dev->priv = ide;
> +
> + ret = ide_port_register(ide);
> + if (ret)
> + free(ide);
> +
> + return ret;
> +}
> +
> +static const struct of_device_id mv_sata_dt_ids[] = {
> + {
> + .compatible = "marvell,armada-370-sata",
> + }, {
> + /* sentinel */
> + }
> +};
> +
> +static struct driver_d mv_sata_driver = {
> + .name = "mv_sata",
> + .probe = mv_sata_probe,
> + .of_compatible = mv_sata_dt_ids,
> +};
> +device_platform_driver(mv_sata_driver);
> --
> 2.11.0
>
>
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