diff options
Diffstat (limited to 'drivers/ide/arm/palm_bk3710.c')
| -rw-r--r-- | drivers/ide/arm/palm_bk3710.c | 395 |
1 files changed, 395 insertions, 0 deletions
diff --git a/drivers/ide/arm/palm_bk3710.c b/drivers/ide/arm/palm_bk3710.c new file mode 100644 index 0000000..c306997 --- /dev/null +++ b/drivers/ide/arm/palm_bk3710.c @@ -0,0 +1,395 @@ +/* + * 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"); + |
