Patchwork [U-Boot] BLOCK: Add freescale IMX51 PATA driver

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Submitter Marek Vasut
Date Nov. 26, 2010, 10:28 p.m.
Message ID <1290810494-26936-1-git-send-email-marek.vasut@gmail.com>
Download mbox | patch
Permalink /patch/73247/
State Superseded
Delegated to: Stefano Babic
Headers show

Comments

Marek Vasut - Nov. 26, 2010, 10:28 p.m.
Signed-off-by: Marek Vasut <marek.vasut@gmail.com>
---
 drivers/block/Makefile  |    1 +
 drivers/block/mxc_ata.c |  139 +++++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 140 insertions(+), 0 deletions(-)
 create mode 100644 drivers/block/mxc_ata.c
Wolfgang Denk - Nov. 26, 2010, 11:13 p.m.
Dear Marek Vasut,

In message <1290810494-26936-1-git-send-email-marek.vasut@gmail.com> you wrote:
> Signed-off-by: Marek Vasut <marek.vasut@gmail.com>
> ---
>  drivers/block/Makefile  |    1 +
>  drivers/block/mxc_ata.c |  139 +++++++++++++++++++++++++++++++++++++++++++++++
>  2 files changed, 140 insertions(+), 0 deletions(-)
>  create mode 100644 drivers/block/mxc_ata.c
...

> +/* MXC ATA register offsets */
> +enum {
> +	MXC_ATA_TIME_OFF		= 0x00,
> +	MXC_ATA_TIME_ON			= 0x01,
...

Please convert to a C struct.

Thanks.

Best regards,

Wolfgang Denk

Patch

diff --git a/drivers/block/Makefile b/drivers/block/Makefile
index e27175b..aa7dc87 100644
--- a/drivers/block/Makefile
+++ b/drivers/block/Makefile
@@ -31,6 +31,7 @@  COBJS-$(CONFIG_FSL_SATA) += fsl_sata.o
 COBJS-$(CONFIG_LIBATA) += libata.o
 COBJS-$(CONFIG_CMD_MG_DISK) += mg_disk.o
 COBJS-$(CONFIG_MVSATA_IDE) += mvsata_ide.o
+COBJS-$(CONFIG_MX51_PATA) += mxc_ata.o
 COBJS-$(CONFIG_PATA_BFIN) += pata_bfin.o
 COBJS-$(CONFIG_SATA_DWC) += sata_dwc.o
 COBJS-$(CONFIG_SATA_SIL3114) += sata_sil3114.o
diff --git a/drivers/block/mxc_ata.c b/drivers/block/mxc_ata.c
new file mode 100644
index 0000000..6f19e6f
--- /dev/null
+++ b/drivers/block/mxc_ata.c
@@ -0,0 +1,139 @@ 
+/*
+ * 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.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ */
+
+#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 */
+enum {
+	MXC_ATA_TIME_OFF		= 0x00,
+	MXC_ATA_TIME_ON			= 0x01,
+	MXC_ATA_TIME_1			= 0x02,
+	MXC_ATA_TIME_2W			= 0x03,
+	MXC_ATA_TIME_2R			= 0x04,
+	MXC_ATA_TIME_AX			= 0x05,
+	MXC_ATA_TIME_PIO_RDX		= 0x06,
+	MXC_ATA_TIME_4			= 0x07,
+	MXC_ATA_TIME_9			= 0x08,
+	MXC_ATA_TIME_M			= 0x09,
+	MXC_ATA_TIME_JN			= 0x0a,
+	MXC_ATA_TIME_D			= 0x0b,
+	MXC_ATA_TIME_K			= 0x0c,
+	MXC_ATA_TIME_ACK		= 0x0d,
+	MXC_ATA_TIME_ENV		= 0x0e,
+	MXC_ATA_TIME_UDMA_RDX		= 0x0f,
+	MXC_ATA_TIME_ZAH		= 0x10,
+	MXC_ATA_TIME_MLIX		= 0x11,
+	MXC_ATA_TIME_DVH		= 0x12,
+	MXC_ATA_TIME_DZFS		= 0x13,
+	MXC_ATA_TIME_DVS		= 0x14,
+	MXC_ATA_TIME_CVH		= 0x15,
+	MXC_ATA_TIME_SS			= 0x16,
+	MXC_ATA_TIME_CYC		= 0x17,
+	MXC_ATA_FIFO_DATA_16		= 0x1c,
+	MXC_ATA_FIFO_DATA_32		= 0x18,
+	MXC_ATA_FIFO_FILL		= 0x20,
+	MXC_ATA_ATA_CONTROL		= 0x24,
+	MXC_ATA_INTERRUPT_PENDING	= 0x28,
+	MXC_ATA_INTERRUPT_ENABLE	= 0x2c,
+	MXC_ATA_INTERRUPT_CLEAR		= 0x30,
+	MXC_ATA_FIFO_ALARM		= 0x34,
+	MXC_ATA_DRIVE_DATA		= 0xa0,
+	MXC_ATA_DRIVE_FEATURES		= 0xa4,
+	MXC_ATA_DRIVE_SECTOR_COUNT	= 0xa8,
+	MXC_ATA_DRIVE_SECTOR_NUM	= 0xac,
+	MXC_ATA_DRIVE_CYL_LOW		= 0xb0,
+	MXC_ATA_DRIVE_CYL_HIGH		= 0xb4,
+	MXC_ATA_DRIVE_DEV_HEAD		= 0xb8,
+	MXC_ATA_COMMAND			= 0xbc,
+	MXC_ATA_STATUS			= 0xbc,
+	MXC_ATA_ALT_STATUS		= 0xd8,
+};
+
+/* PIO timing table */
+#define	NR_PIO_SPECS	5
+uint16_t pio_t0[NR_PIO_SPECS]		= { 600, 383, 240, 180, 120 };
+uint16_t pio_t1[NR_PIO_SPECS]		= { 70,  50,  30,  30,  25 };
+uint16_t pio_t2_8[NR_PIO_SPECS]		= { 290, 290, 290, 80,  70 };
+uint16_t pio_t2_16[NR_PIO_SPECS]	= { 165, 125, 100, 80,  70 };
+uint16_t pio_t2i[NR_PIO_SPECS]		= { 40,  0,   0,   0,   0 };
+uint16_t pio_t4[NR_PIO_SPECS]		= { 30,  20,  15,  10,  10 };
+uint16_t pio_t9[NR_PIO_SPECS]		= { 20,  15,  10,  10,  10 };
+uint16_t pio_tA[NR_PIO_SPECS]		= { 50,  50,  50,  50,  50 };
+
+#define	REG_TO_OFFSET(reg)	((reg & 0x3) * 8)
+static void set_ata_bus_timing(unsigned char mode)
+{
+	uint32_t val;
+	uint32_t T = 1000000000 / mxc_get_clock(MXC_IPG_CLK);
+
+	if (mode >= NR_PIO_SPECS)
+		return;
+
+	/* Write TIME_OFF/ON/1/2W */
+	val =	(3 << REG_TO_OFFSET(MXC_ATA_TIME_OFF)) |
+		(3 << REG_TO_OFFSET(MXC_ATA_TIME_ON)) |
+		(((pio_t1[mode] + T) / T) << REG_TO_OFFSET(MXC_ATA_TIME_1)) |
+		(((pio_t2_8[mode] + T) / T) << REG_TO_OFFSET(MXC_ATA_TIME_2W));
+	writel(val, MXC_ATA_TIME_OFF + CONFIG_SYS_ATA_BASE_ADDR);
+
+	/* Write TIME_2R/AX/RDX/4 */
+	val =	(((pio_t2_8[mode] + T) / T) << REG_TO_OFFSET(MXC_ATA_TIME_2R)) |
+		(((pio_tA[mode] + T) / T + 2) << REG_TO_OFFSET(MXC_ATA_TIME_AX)) |
+		(1 << REG_TO_OFFSET(MXC_ATA_TIME_PIO_RDX)) |
+		(((pio_t4[mode] + T) / T) << REG_TO_OFFSET(MXC_ATA_TIME_4));
+	writel(val, MXC_ATA_TIME_2R + CONFIG_SYS_ATA_BASE_ADDR);
+
+	/* Write TIME_9 ; the rest of timing registers is irrelevant for PIO */
+	val =	(((pio_t9[mode] + T) / T) << REG_TO_OFFSET(MXC_ATA_TIME_9));
+	writel(val, MXC_ATA_TIME_9 + CONFIG_SYS_ATA_BASE_ADDR);
+}
+
+int ide_preinit(void)
+{
+	uint32_t ata_control = CONFIG_SYS_ATA_BASE_ADDR + MXC_ATA_ATA_CONTROL;
+
+	/* 46.3.3.4 @ FSL iMX51 manual */
+	writel(0x80, ata_control);	/* FIFO normal op., drive reset */
+	writel(0xc0, ata_control);	/* FIFO normal op., drive not reset */
+
+	/* Configure the PIO timing */
+	set_ata_bus_timing(CONFIG_MXC_ATA_PIO_MODE);
+
+	/* 46.3.3.4 @ FSL iMX51 manual */
+	writel(0x41, ata_control);	/* Drive not reset, IORDY handshake */
+
+	return 0;
+}