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