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@@ -0,0 +1,395 @@
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+/*
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+ * Palmchip bk3710 IDE controller
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+ *
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+ * Copyright (C) 2006 Texas Instruments.
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+ * Copyright (C) 2007 MontaVista Software, Inc., <source@mvista.com>
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+ *
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+ * ----------------------------------------------------------------------------
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+ *
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+ * This program is free software; you can redistribute it and/or modify
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+ * it under the terms of the GNU General Public License as published by
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+ * the Free Software Foundation; either version 2 of the License, or
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+ * (at your option) any later version.
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+ *
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+ * This program is distributed in the hope that it will be useful,
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+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
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+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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+ * GNU General Public License for more details.
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+ *
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+ * You should have received a copy of the GNU General Public License
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+ * along with this program; if not, write to the Free Software
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+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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+ * ----------------------------------------------------------------------------
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+ *
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+ */
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+
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+#include <linux/types.h>
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+#include <linux/module.h>
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+#include <linux/kernel.h>
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+#include <linux/ioport.h>
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+#include <linux/hdreg.h>
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+#include <linux/ide.h>
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+#include <linux/delay.h>
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+#include <linux/init.h>
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+#include <linux/clk.h>
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+#include <linux/platform_device.h>
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+
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+/* Offset of the primary interface registers */
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+#define IDE_PALM_ATA_PRI_REG_OFFSET 0x1F0
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+
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+/* Primary Control Offset */
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+#define IDE_PALM_ATA_PRI_CTL_OFFSET 0x3F6
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+
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+/*
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+ * PalmChip 3710 IDE Controller UDMA timing structure Definition
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+ */
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+struct palm_bk3710_udmatiming {
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+ unsigned int rptime; /* Ready to pause time */
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+ unsigned int cycletime; /* Cycle Time */
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+};
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+
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+#define BK3710_BMICP 0x00
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+#define BK3710_BMISP 0x02
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+#define BK3710_BMIDTP 0x04
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+#define BK3710_BMICS 0x08
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+#define BK3710_BMISS 0x0A
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+#define BK3710_BMIDTS 0x0C
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+#define BK3710_IDETIMP 0x40
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+#define BK3710_IDETIMS 0x42
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+#define BK3710_SIDETIM 0x44
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+#define BK3710_SLEWCTL 0x45
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+#define BK3710_IDESTATUS 0x47
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+#define BK3710_UDMACTL 0x48
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+#define BK3710_UDMATIM 0x4A
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+#define BK3710_MISCCTL 0x50
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+#define BK3710_REGSTB 0x54
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+#define BK3710_REGRCVR 0x58
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+#define BK3710_DATSTB 0x5C
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+#define BK3710_DATRCVR 0x60
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+#define BK3710_DMASTB 0x64
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+#define BK3710_DMARCVR 0x68
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+#define BK3710_UDMASTB 0x6C
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+#define BK3710_UDMATRP 0x70
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+#define BK3710_UDMAENV 0x74
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+#define BK3710_IORDYTMP 0x78
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+#define BK3710_IORDYTMS 0x7C
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+
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+#include "../ide-timing.h"
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+
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+static long ide_palm_clk;
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+
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+static const struct palm_bk3710_udmatiming palm_bk3710_udmatimings[6] = {
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+ {160, 240}, /* UDMA Mode 0 */
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+ {125, 160}, /* UDMA Mode 1 */
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+ {100, 120}, /* UDMA Mode 2 */
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+ {100, 90}, /* UDMA Mode 3 */
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+ {85, 60}, /* UDMA Mode 4 */
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+};
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+
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+static struct clk *ideclkp;
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+
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+static void palm_bk3710_setudmamode(void __iomem *base, unsigned int dev,
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+ unsigned int mode)
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+{
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+ u8 tenv, trp, t0;
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+ u32 val32;
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+ u16 val16;
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+
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+ /* DMA Data Setup */
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+ t0 = (palm_bk3710_udmatimings[mode].cycletime + ide_palm_clk - 1)
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+ / ide_palm_clk - 1;
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+ tenv = (20 + ide_palm_clk - 1) / ide_palm_clk - 1;
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+ trp = (palm_bk3710_udmatimings[mode].rptime + ide_palm_clk - 1)
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+ / ide_palm_clk - 1;
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+
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+ /* udmatim Register */
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+ val16 = readw(base + BK3710_UDMATIM) & (dev ? 0xFF0F : 0xFFF0);
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+ val16 |= (mode << (dev ? 4 : 0));
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+ writew(val16, base + BK3710_UDMATIM);
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+
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+ /* udmastb Ultra DMA Access Strobe Width */
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+ val32 = readl(base + BK3710_UDMASTB) & (0xFF << (dev ? 0 : 8));
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+ val32 |= (t0 << (dev ? 8 : 0));
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+ writel(val32, base + BK3710_UDMASTB);
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+
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+ /* udmatrp Ultra DMA Ready to Pause Time */
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+ val32 = readl(base + BK3710_UDMATRP) & (0xFF << (dev ? 0 : 8));
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+ val32 |= (trp << (dev ? 8 : 0));
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+ writel(val32, base + BK3710_UDMATRP);
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+
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+ /* udmaenv Ultra DMA envelop Time */
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+ val32 = readl(base + BK3710_UDMAENV) & (0xFF << (dev ? 0 : 8));
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+ val32 |= (tenv << (dev ? 8 : 0));
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+ writel(val32, base + BK3710_UDMAENV);
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+
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+ /* Enable UDMA for Device */
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+ val16 = readw(base + BK3710_UDMACTL) | (1 << dev);
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+ writew(val16, base + BK3710_UDMACTL);
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+}
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+
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+static void palm_bk3710_setdmamode(void __iomem *base, unsigned int dev,
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+ unsigned short min_cycle,
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+ unsigned int mode)
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+{
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+ u8 td, tkw, t0;
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+ u32 val32;
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+ u16 val16;
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+ struct ide_timing *t;
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+ int cycletime;
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+
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+ t = ide_timing_find_mode(mode);
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+ cycletime = max_t(int, t->cycle, min_cycle);
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+
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+ /* DMA Data Setup */
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+ t0 = (cycletime + ide_palm_clk - 1) / ide_palm_clk;
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+ td = (t->active + ide_palm_clk - 1) / ide_palm_clk;
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+ tkw = t0 - td - 1;
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+ td -= 1;
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+
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+ val32 = readl(base + BK3710_DMASTB) & (0xFF << (dev ? 0 : 8));
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+ val32 |= (td << (dev ? 8 : 0));
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+ writel(val32, base + BK3710_DMASTB);
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+
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+ val32 = readl(base + BK3710_DMARCVR) & (0xFF << (dev ? 0 : 8));
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+ val32 |= (tkw << (dev ? 8 : 0));
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+ writel(val32, base + BK3710_DMARCVR);
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+
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+ /* Disable UDMA for Device */
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+ val16 = readw(base + BK3710_UDMACTL) & ~(1 << dev);
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+ writew(val16, base + BK3710_UDMACTL);
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+}
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+
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+static void palm_bk3710_setpiomode(void __iomem *base, ide_drive_t *mate,
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+ unsigned int dev, unsigned int cycletime,
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+ unsigned int mode)
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+{
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+ u8 t2, t2i, t0;
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+ u32 val32;
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+ struct ide_timing *t;
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+
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+ /* PIO Data Setup */
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+ t0 = (cycletime + ide_palm_clk - 1) / ide_palm_clk;
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+ t2 = (ide_timing_find_mode(XFER_PIO_0 + mode)->active +
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+ ide_palm_clk - 1) / ide_palm_clk;
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+
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+ t2i = t0 - t2 - 1;
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+ t2 -= 1;
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+
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+ val32 = readl(base + BK3710_DATSTB) & (0xFF << (dev ? 0 : 8));
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+ val32 |= (t2 << (dev ? 8 : 0));
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+ writel(val32, base + BK3710_DATSTB);
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+
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+ val32 = readl(base + BK3710_DATRCVR) & (0xFF << (dev ? 0 : 8));
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+ val32 |= (t2i << (dev ? 8 : 0));
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+ writel(val32, base + BK3710_DATRCVR);
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+
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+ if (mate && mate->present) {
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+ u8 mode2 = ide_get_best_pio_mode(mate, 255, 4);
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+
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+ if (mode2 < mode)
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+ mode = mode2;
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+ }
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+
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+ /* TASKFILE Setup */
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+ t = ide_timing_find_mode(XFER_PIO_0 + mode);
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+ t0 = (t->cyc8b + ide_palm_clk - 1) / ide_palm_clk;
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+ t2 = (t->act8b + ide_palm_clk - 1) / ide_palm_clk;
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+
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+ t2i = t0 - t2 - 1;
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+ t2 -= 1;
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+
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+ val32 = readl(base + BK3710_REGSTB) & (0xFF << (dev ? 0 : 8));
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+ val32 |= (t2 << (dev ? 8 : 0));
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+ writel(val32, base + BK3710_REGSTB);
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+
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+ val32 = readl(base + BK3710_REGRCVR) & (0xFF << (dev ? 0 : 8));
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+ val32 |= (t2i << (dev ? 8 : 0));
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+ writel(val32, base + BK3710_REGRCVR);
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+}
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+
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+static void palm_bk3710_set_dma_mode(ide_drive_t *drive, u8 xferspeed)
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+{
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+ int is_slave = drive->dn & 1;
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+ void __iomem *base = (void *)drive->hwif->dma_base;
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+
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+ if (xferspeed >= XFER_UDMA_0) {
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+ palm_bk3710_setudmamode(base, is_slave,
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+ xferspeed - XFER_UDMA_0);
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+ } else {
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+ palm_bk3710_setdmamode(base, is_slave, drive->id->eide_dma_min,
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+ xferspeed);
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+ }
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+}
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+
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+static void palm_bk3710_set_pio_mode(ide_drive_t *drive, u8 pio)
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+{
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+ unsigned int cycle_time;
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+ int is_slave = drive->dn & 1;
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+ ide_drive_t *mate;
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+ void __iomem *base = (void *)drive->hwif->dma_base;
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+
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+ /*
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+ * Obtain the drive PIO data for tuning the Palm Chip registers
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+ */
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+ cycle_time = ide_pio_cycle_time(drive, pio);
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+ mate = ide_get_paired_drive(drive);
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+ palm_bk3710_setpiomode(base, mate, is_slave, cycle_time, pio);
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+}
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+
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+static void __devinit palm_bk3710_chipinit(void __iomem *base)
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+{
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+ /*
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+ * enable the reset_en of ATA controller so that when ata signals
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+ * are brought out, by writing into device config. at that
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+ * time por_n signal should not be 'Z' and have a stable value.
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+ */
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+ writel(0x0300, base + BK3710_MISCCTL);
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+
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+ /* wait for some time and deassert the reset of ATA Device. */
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+ mdelay(100);
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+
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+ /* Deassert the Reset */
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+ writel(0x0200, base + BK3710_MISCCTL);
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+
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+ /*
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+ * Program the IDETIMP Register Value based on the following assumptions
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+ *
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+ * (ATA_IDETIMP_IDEEN , ENABLE ) |
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+ * (ATA_IDETIMP_SLVTIMEN , DISABLE) |
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+ * (ATA_IDETIMP_RDYSMPL , 70NS) |
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+ * (ATA_IDETIMP_RDYRCVRY , 50NS) |
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+ * (ATA_IDETIMP_DMAFTIM1 , PIOCOMP) |
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+ * (ATA_IDETIMP_PREPOST1 , DISABLE) |
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+ * (ATA_IDETIMP_RDYSEN1 , DISABLE) |
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+ * (ATA_IDETIMP_PIOFTIM1 , DISABLE) |
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+ * (ATA_IDETIMP_DMAFTIM0 , PIOCOMP) |
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+ * (ATA_IDETIMP_PREPOST0 , DISABLE) |
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+ * (ATA_IDETIMP_RDYSEN0 , DISABLE) |
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+ * (ATA_IDETIMP_PIOFTIM0 , DISABLE)
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+ */
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+ writew(0xB388, base + BK3710_IDETIMP);
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+
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+ /*
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+ * Configure SIDETIM Register
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+ * (ATA_SIDETIM_RDYSMPS1 ,120NS ) |
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+ * (ATA_SIDETIM_RDYRCYS1 ,120NS )
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+ */
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+ writeb(0, base + BK3710_SIDETIM);
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+
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+ /*
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+ * UDMACTL Ultra-ATA DMA Control
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+ * (ATA_UDMACTL_UDMAP1 , 0 ) |
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+ * (ATA_UDMACTL_UDMAP0 , 0 )
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+ *
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+ */
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+ writew(0, base + BK3710_UDMACTL);
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+
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+ /*
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+ * MISCCTL Miscellaneous Conrol Register
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+ * (ATA_MISCCTL_RSTMODEP , 1) |
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+ * (ATA_MISCCTL_RESETP , 0) |
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+ * (ATA_MISCCTL_TIMORIDE , 1)
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+ */
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+ writel(0x201, base + BK3710_MISCCTL);
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+
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+ /*
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+ * IORDYTMP IORDY Timer for Primary Register
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+ * (ATA_IORDYTMP_IORDYTMP , 0xffff )
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+ */
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+ writel(0xFFFF, base + BK3710_IORDYTMP);
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+
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+ /*
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+ * Configure BMISP Register
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+ * (ATA_BMISP_DMAEN1 , DISABLE ) |
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+ * (ATA_BMISP_DMAEN0 , DISABLE ) |
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+ * (ATA_BMISP_IORDYINT , CLEAR) |
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+ * (ATA_BMISP_INTRSTAT , CLEAR) |
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+ * (ATA_BMISP_DMAERROR , CLEAR)
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+ */
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+ writew(0, base + BK3710_BMISP);
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+
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+ palm_bk3710_setpiomode(base, NULL, 0, 600, 0);
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+ palm_bk3710_setpiomode(base, NULL, 1, 600, 0);
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+}
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+static int __devinit palm_bk3710_probe(struct platform_device *pdev)
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+{
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+ hw_regs_t ide_ctlr_info;
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+ int index = 0;
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+ int pribase;
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+ struct clk *clkp;
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+ struct resource *mem, *irq;
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+ ide_hwif_t *hwif;
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+ void __iomem *base;
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+
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+ clkp = clk_get(NULL, "IDECLK");
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+ if (IS_ERR(clkp))
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+ return -ENODEV;
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+
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+ ideclkp = clkp;
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+ clk_enable(ideclkp);
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+ ide_palm_clk = clk_get_rate(ideclkp)/100000;
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+ ide_palm_clk = (10000/ide_palm_clk) + 1;
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+ /* Register the IDE interface with Linux ATA Interface */
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+ memset(&ide_ctlr_info, 0, sizeof(ide_ctlr_info));
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+
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+ mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
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+ if (mem == NULL) {
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+ printk(KERN_ERR "failed to get memory region resource\n");
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+ return -ENODEV;
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+ }
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+ irq = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
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+ if (irq == NULL) {
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+ printk(KERN_ERR "failed to get IRQ resource\n");
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+ return -ENODEV;
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+ }
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+
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+ base = (void *)mem->start;
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+
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+ /* Configure the Palm Chip controller */
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+ palm_bk3710_chipinit(base);
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+
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+ pribase = mem->start + IDE_PALM_ATA_PRI_REG_OFFSET;
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+ for (index = 0; index < IDE_NR_PORTS - 2; index++)
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+ ide_ctlr_info.io_ports[index] = pribase + index;
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+ ide_ctlr_info.io_ports[IDE_CONTROL_OFFSET] = mem->start +
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+ IDE_PALM_ATA_PRI_CTL_OFFSET;
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+ ide_ctlr_info.irq = irq->start;
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+ ide_ctlr_info.chipset = ide_palm3710;
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+
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+ if (ide_register_hw(&ide_ctlr_info, NULL, &hwif) < 0) {
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+ printk(KERN_WARNING "Palm Chip BK3710 IDE Register Fail\n");
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+ return -ENODEV;
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+ }
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+
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+ hwif->set_pio_mode = &palm_bk3710_set_pio_mode;
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+ hwif->set_dma_mode = &palm_bk3710_set_dma_mode;
|
|
|
+ hwif->mmio = 1;
|
|
|
+ default_hwif_mmiops(hwif);
|
|
|
+ hwif->cbl = ATA_CBL_PATA80;
|
|
|
+ hwif->ultra_mask = 0x1f; /* Ultra DMA Mode 4 Max
|
|
|
+ (input clk 99MHz) */
|
|
|
+ hwif->mwdma_mask = 0x7;
|
|
|
+ hwif->drives[0].autotune = 1;
|
|
|
+ hwif->drives[1].autotune = 1;
|
|
|
+
|
|
|
+ ide_setup_dma(hwif, mem->start);
|
|
|
+
|
|
|
+ return 0;
|
|
|
+}
|
|
|
+
|
|
|
+static struct platform_driver platform_bk_driver = {
|
|
|
+ .driver = {
|
|
|
+ .name = "palm_bk3710",
|
|
|
+ },
|
|
|
+ .probe = palm_bk3710_probe,
|
|
|
+ .remove = NULL,
|
|
|
+};
|
|
|
+
|
|
|
+static int __init palm_bk3710_init(void)
|
|
|
+{
|
|
|
+ return platform_driver_register(&platform_bk_driver);
|
|
|
+}
|
|
|
+
|
|
|
+module_init(palm_bk3710_init);
|
|
|
+MODULE_LICENSE("GPL");
|
|
|
+
|