1 files changed, 199 insertions, 0 deletions
diff --git a/drivers/ata/mvsata_ide.c b/drivers/ata/mvsata_ide.c
new file mode 100644
index 0000000000..7b6a1558d2
--- /dev/null
+++ b/drivers/ata/mvsata_ide.c
@@ -0,0 +1,199 @@
+/*
+ * Copyright (C) 2010 Albert ARIBAUD <albert.u.boot@aribaud.net>
+ *
+ * Written-by: Albert ARIBAUD <albert.u.boot@aribaud.net>
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#include <common.h>
+#include <asm/io.h>
+
+#if defined(CONFIG_ORION5X)
+#include <asm/arch/orion5x.h>
+#elif defined(CONFIG_KIRKWOOD)
+#include <asm/arch/soc.h>
+#elif defined(CONFIG_ARCH_MVEBU)
+#include <linux/mbus.h>
+#endif
+
+/* SATA port registers */
+struct mvsata_port_registers {
+	u32 reserved0[10];
+	u32 edma_cmd;
+	u32 reserved1[181];
+	/* offset 0x300 : ATA Interface registers */
+	u32 sstatus;
+	u32 serror;
+	u32 scontrol;
+	u32 ltmode;
+	u32 phymode3;
+	u32 phymode4;
+	u32 reserved2[5];
+	u32 phymode1;
+	u32 phymode2;
+	u32 bist_cr;
+	u32 bist_dw1;
+	u32 bist_dw2;
+	u32 serrorintrmask;
+};
+
+/*
+ * Sanity checks:
+ * - to compile at all, we need CONFIG_SYS_ATA_BASE_ADDR.
+ * - for ide_preinit to make sense, we need at least one of
+ *   CONFIG_SYS_ATA_IDE0_OFFSET or CONFIG_SYS_ATA_IDE1_OFFSET;
+ * - for ide_preinit to be called, we need CONFIG_IDE_PREINIT.
+ * Fail with an explanation message if these conditions are not met.
+ * This is particularly important for CONFIG_IDE_PREINIT, because
+ * its lack would not cause a build error.
+ */
+
+#if !defined(CONFIG_SYS_ATA_BASE_ADDR)
+#error CONFIG_SYS_ATA_BASE_ADDR must be defined
+#elif !defined(CONFIG_SYS_ATA_IDE0_OFFSET) \
+   && !defined(CONFIG_SYS_ATA_IDE1_OFFSET)
+#error CONFIG_SYS_ATA_IDE0_OFFSET or CONFIG_SYS_ATA_IDE1_OFFSET \
+   must be defined
+#elif !defined(CONFIG_IDE_PREINIT)
+#error CONFIG_IDE_PREINIT must be defined
+#endif
+
+/*
+ * Masks and values for SControl DETection and Interface Power Management,
+ * and for SStatus DETection.
+ */
+
+#define MVSATA_EDMA_CMD_ATA_RST		0x00000004
+#define MVSATA_SCONTROL_DET_MASK		0x0000000F
+#define MVSATA_SCONTROL_DET_NONE		0x00000000
+#define MVSATA_SCONTROL_DET_INIT		0x00000001
+#define MVSATA_SCONTROL_IPM_MASK		0x00000F00
+#define MVSATA_SCONTROL_IPM_NO_LP_ALLOWED	0x00000300
+#define MVSATA_SCONTROL_MASK \
+	(MVSATA_SCONTROL_DET_MASK|MVSATA_SCONTROL_IPM_MASK)
+#define MVSATA_PORT_INIT \
+	(MVSATA_SCONTROL_DET_INIT|MVSATA_SCONTROL_IPM_NO_LP_ALLOWED)
+#define MVSATA_PORT_USE \
+	(MVSATA_SCONTROL_DET_NONE|MVSATA_SCONTROL_IPM_NO_LP_ALLOWED)
+#define MVSATA_SSTATUS_DET_MASK			0x0000000F
+#define MVSATA_SSTATUS_DET_DEVCOMM		0x00000003
+
+/*
+ * Status codes to return to client callers. Currently, callers ignore
+ * exact value and only care for zero or nonzero, so no need to make this
+ * public, it is only #define'd for clarity.
+ * If/when standard negative codes are implemented in U-Boot, then these
+ * #defines should be moved to, or replaced by ones from, the common list
+ * of status codes.
+ */
+
+#define MVSATA_STATUS_OK	0
+#define MVSATA_STATUS_TIMEOUT	-1
+
+/*
+ * Registers for SATA MBUS memory windows
+ */
+
+#define MVSATA_WIN_CONTROL(w)	(MVEBU_AXP_SATA_BASE + 0x30 + ((w) << 4))
+#define MVSATA_WIN_BASE(w)	(MVEBU_AXP_SATA_BASE + 0x34 + ((w) << 4))
+
+/*
+ * Initialize SATA memory windows for Armada XP
+ */
+
+#ifdef CONFIG_ARCH_MVEBU
+static void mvsata_ide_conf_mbus_windows(void)
+{
+	const struct mbus_dram_target_info *dram;
+	int i;
+
+	dram = mvebu_mbus_dram_info();
+
+	/* Disable windows, Set Size/Base to 0  */
+	for (i = 0; i < 4; i++) {
+		writel(0, MVSATA_WIN_CONTROL(i));
+		writel(0, MVSATA_WIN_BASE(i));
+	}
+
+	for (i = 0; i < dram->num_cs; i++) {
+		const struct mbus_dram_window *cs = dram->cs + i;
+		writel(((cs->size - 1) & 0xffff0000) | (cs->mbus_attr << 8) |
+				(dram->mbus_dram_target_id << 4) | 1,
+				MVSATA_WIN_CONTROL(i));
+		writel(cs->base & 0xffff0000, MVSATA_WIN_BASE(i));
+	}
+}
+#endif
+
+/*
+ * Initialize one MVSATAHC port: set SControl's IPM to "always active"
+ * and DET to "reset", then wait for SStatus's DET to become "device and
+ * comm ok" (or time out after 50 us if no device), then set SControl's
+ * DET back to "no action".
+ */
+
+static int mvsata_ide_initialize_port(struct mvsata_port_registers *port)
+{
+	u32 control;
+	u32 status;
+	u32 timeleft = 10000; /* wait at most 10 ms for SATA reset to complete */
+
+	/* Hard reset */
+	writel(MVSATA_EDMA_CMD_ATA_RST, &port->edma_cmd);
+	udelay(25); /* taken from original marvell port */
+	writel(0, &port->edma_cmd);
+
+	/* Set control IPM to 3 (no low power) and DET to 1 (initialize) */
+	control = readl(&port->scontrol);
+	control = (control & ~MVSATA_SCONTROL_MASK) | MVSATA_PORT_INIT;
+	writel(control, &port->scontrol);
+	/* Toggle control DET back to 0 (normal operation) */
+	control = (control & ~MVSATA_SCONTROL_MASK) | MVSATA_PORT_USE;
+	writel(control, &port->scontrol);
+	/* wait for status DET to become 3 (device and communication OK) */
+	while (--timeleft) {
+		status = readl(&port->sstatus) & MVSATA_SSTATUS_DET_MASK;
+		if (status == MVSATA_SSTATUS_DET_DEVCOMM)
+			break;
+		udelay(1);
+	}
+	/* return success or time-out error depending on time left */
+	if (!timeleft)
+		return MVSATA_STATUS_TIMEOUT;
+	return MVSATA_STATUS_OK;
+}
+
+/*
+ * ide_preinit() will be called by ide_init in cmd_ide.c and will
+ * reset the MVSTATHC ports needed by the board.
+ */
+
+int ide_preinit(void)
+{
+	int ret = MVSATA_STATUS_TIMEOUT;
+	int status;
+
+#ifdef CONFIG_ARCH_MVEBU
+	mvsata_ide_conf_mbus_windows();
+#endif
+
+	/* Enable ATA port 0 (could be SATA port 0 or 1) if declared */
+#if defined(CONFIG_SYS_ATA_IDE0_OFFSET)
+	status = mvsata_ide_initialize_port(
+		(struct mvsata_port_registers *)
+		(CONFIG_SYS_ATA_BASE_ADDR + CONFIG_SYS_ATA_IDE0_OFFSET));
+	if (status == MVSATA_STATUS_OK)
+		ret = MVSATA_STATUS_OK;
+#endif
+	/* Enable ATA port 1 (could be SATA port 0 or 1) if declared */
+#if defined(CONFIG_SYS_ATA_IDE1_OFFSET)
+	status = mvsata_ide_initialize_port(
+		(struct mvsata_port_registers *)
+		(CONFIG_SYS_ATA_BASE_ADDR + CONFIG_SYS_ATA_IDE1_OFFSET));
+	if (status == MVSATA_STATUS_OK)
+		ret = MVSATA_STATUS_OK;
+#endif
+	/* Return success if at least one port initialization succeeded */
+	return ret;
+}