ata: new driver to support the internal sata controller on Armada-XP

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

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

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
 

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);