1 files changed, 129 insertions, 0 deletions

diff --git a/qemu/roms/u-boot/drivers/block/mxc_ata.c b/qemu/roms/u-boot/drivers/block/mxc_ata.c
new file mode 100644
index 000000000..44bb406f4
--- /dev/null
+++ b/qemu/roms/u-boot/drivers/block/mxc_ata.c
@@ -0,0 +1,129 @@
+/*
+ * Freescale iMX51 ATA driver
+ *
+ * Copyright (C) 2010 Marek Vasut <marek.vasut@gmail.com>
+ *
+ * Based on code by:
+ *	Mahesh Mahadevan <mahesh.mahadevan@freescale.com>
+ *
+ * Based on code from original FSL ATA driver, which is
+ * part of eCos, the Embedded Configurable Operating System.
+ * Copyright (C) 1998, 1999, 2000, 2001, 2002 Red Hat, Inc.
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#include <common.h>
+#include <command.h>
+#include <config.h>
+#include <asm/byteorder.h>
+#include <asm/io.h>
+#include <ide.h>
+
+#include <asm/arch/imx-regs.h>
+#include <asm/arch/clock.h>
+
+/* MXC ATA register offsets */
+struct mxc_ata_config_regs {
+	u8	time_off;	/* 0x00 */
+	u8	time_on;
+	u8	time_1;
+	u8	time_2w;
+	u8	time_2r;
+	u8	time_ax;
+	u8	time_pio_rdx;
+	u8	time_4;
+	u8	time_9;
+	u8	time_m;
+	u8	time_jn;
+	u8	time_d;
+	u8	time_k;
+	u8	time_ack;
+	u8	time_env;
+	u8	time_udma_rdx;
+	u8	time_zah;	/* 0x10 */
+	u8	time_mlix;
+	u8	time_dvh;
+	u8	time_dzfs;
+	u8	time_dvs;
+	u8	time_cvh;
+	u8	time_ss;
+	u8	time_cyc;
+	u32	fifo_data_32;	/* 0x18 */
+	u32	fifo_data_16;
+	u32	fifo_fill;
+	u32	ata_control;
+	u32	interrupt_pending;
+	u32	interrupt_enable;
+	u32	interrupt_clear;
+	u32	fifo_alarm;
+};
+
+struct mxc_data_hdd_regs {
+	u32	drive_data;	/* 0xa0 */
+	u32	drive_features;
+	u32	drive_sector_count;
+	u32	drive_sector_num;
+	u32	drive_cyl_low;
+	u32	drive_cyl_high;
+	u32	drive_dev_head;
+	u32	command;
+	u32	status;
+	u32	alt_status;
+};
+
+/* PIO timing table */
+#define	NR_PIO_SPECS	5
+static uint16_t pio_t1[NR_PIO_SPECS]	= { 70,  50,  30,  30,  25 };
+static uint16_t pio_t2_8[NR_PIO_SPECS]	= { 290, 290, 290, 80,  70 };
+static uint16_t pio_t4[NR_PIO_SPECS]	= { 30,  20,  15,  10,  10 };
+static uint16_t pio_t9[NR_PIO_SPECS]	= { 20,  15,  10,  10,  10 };
+static uint16_t pio_tA[NR_PIO_SPECS]	= { 50,  50,  50,  50,  50 };
+
+#define	REG2OFF(reg)	((((uint32_t)reg) & 0x3) * 8)
+static void set_ata_bus_timing(unsigned char mode)
+{
+	uint32_t T = 1000000000 / mxc_get_clock(MXC_IPG_CLK);
+
+	struct mxc_ata_config_regs *ata_regs;
+	ata_regs = (struct mxc_ata_config_regs *)CONFIG_SYS_ATA_BASE_ADDR;
+
+	if (mode >= NR_PIO_SPECS)
+		return;
+
+	/* Write TIME_OFF/ON/1/2W */
+	writeb(3, &ata_regs->time_off);
+	writeb(3, &ata_regs->time_on);
+	writeb((pio_t1[mode] + T) / T, &ata_regs->time_1);
+	writeb((pio_t2_8[mode] + T) / T, &ata_regs->time_2w);
+
+	/* Write TIME_2R/AX/RDX/4 */
+	writeb((pio_t2_8[mode] + T) / T, &ata_regs->time_2r);
+	writeb((pio_tA[mode] + T) / T + 2, &ata_regs->time_ax);
+	writeb(1, &ata_regs->time_pio_rdx);
+	writeb((pio_t4[mode] + T) / T, &ata_regs->time_4);
+
+	/* Write TIME_9 ; the rest of timing registers is irrelevant for PIO */
+	writeb((pio_t9[mode] + T) / T, &ata_regs->time_9);
+}
+
+int ide_preinit(void)
+{
+	struct mxc_ata_config_regs *ata_regs;
+	ata_regs = (struct mxc_ata_config_regs *)CONFIG_SYS_ATA_BASE_ADDR;
+
+	/* 46.3.3.4 @ FSL iMX51 manual */
+	/* FIFO normal op., drive reset */
+	writel(0x80, &ata_regs->ata_control);
+	/* FIFO normal op., drive not reset */
+	writel(0xc0, &ata_regs->ata_control);
+
+	/* Configure the PIO timing */
+	set_ata_bus_timing(CONFIG_MXC_ATA_PIO_MODE);
+
+	/* 46.3.3.4 @ FSL iMX51 manual */
+	/* Drive not reset, IORDY handshake */
+	writel(0x41, &ata_regs->ata_control);
+
+	return 0;
+}