/* * Palmchip bk3710 IDE controller * * Copyright (C) 2006 Texas Instruments. * Copyright (C) 2007 MontaVista Software, 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., 675 Mass Ave, Cambridge, MA 02139, USA. * ---------------------------------------------------------------------------- * */ #include #include #include #include #include #include #include #include #include #include /* 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 static unsigned ideclk_period; /* in nanoseconds */ 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 */ {100, 60}, /* UDMA Mode 4 */ {85, 40}, /* UDMA Mode 5 */ }; 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 = DIV_ROUND_UP(palm_bk3710_udmatimings[mode].cycletime, ideclk_period) - 1; tenv = DIV_ROUND_UP(20, ideclk_period) - 1; trp = DIV_ROUND_UP(palm_bk3710_udmatimings[mode].rptime, ideclk_period) - 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 = DIV_ROUND_UP(cycletime, ideclk_period); td = DIV_ROUND_UP(t->active, ideclk_period); 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 = DIV_ROUND_UP(cycletime, ideclk_period); t2 = DIV_ROUND_UP(ide_timing_find_mode(XFER_PIO_0 + mode)->active, ideclk_period); 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 = DIV_ROUND_UP(t->cyc8b, ideclk_period); t2 = DIV_ROUND_UP(t->act8b, ideclk_period); 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[ATA_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 u8 palm_bk3710_cable_detect(ide_hwif_t *hwif) { return ATA_CBL_PATA80; } static int __devinit palm_bk3710_init_dma(ide_hwif_t *hwif, const struct ide_port_info *d) { printk(KERN_INFO " %s: MMIO-DMA\n", hwif->name); if (ide_allocate_dma_engine(hwif)) return -1; hwif->dma_base = hwif->io_ports.data_addr - IDE_PALM_ATA_PRI_REG_OFFSET; hwif->dma_ops = &sff_dma_ops; return 0; } static const struct ide_port_ops palm_bk3710_ports_ops = { .set_pio_mode = palm_bk3710_set_pio_mode, .set_dma_mode = palm_bk3710_set_dma_mode, .cable_detect = palm_bk3710_cable_detect, }; static struct ide_port_info __devinitdata palm_bk3710_port_info = { .init_dma = palm_bk3710_init_dma, .port_ops = &palm_bk3710_ports_ops, .host_flags = IDE_HFLAG_MMIO, .pio_mask = ATA_PIO4, .mwdma_mask = ATA_MWDMA2, }; static int __init palm_bk3710_probe(struct platform_device *pdev) { struct clk *clk; struct resource *mem, *irq; unsigned long base, rate; int i, rc; hw_regs_t hw, *hws[] = { &hw, NULL, NULL, NULL }; clk = clk_get(&pdev->dev, "IDECLK"); if (IS_ERR(clk)) return -ENODEV; clk_enable(clk); rate = clk_get_rate(clk); ideclk_period = 1000000000UL / rate; /* Register the IDE interface with Linux ATA Interface */ memset(&hw, 0, sizeof(hw)); 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; } if (request_mem_region(mem->start, mem->end - mem->start + 1, "palm_bk3710") == NULL) { printk(KERN_ERR "failed to request memory region\n"); return -EBUSY; } base = IO_ADDRESS(mem->start); /* Configure the Palm Chip controller */ palm_bk3710_chipinit((void __iomem *)base); for (i = 0; i < IDE_NR_PORTS - 2; i++) hw.io_ports_array[i] = base + IDE_PALM_ATA_PRI_REG_OFFSET + i; hw.io_ports.ctl_addr = base + IDE_PALM_ATA_PRI_CTL_OFFSET; hw.irq = irq->start; hw.dev = &pdev->dev; hw.chipset = ide_palm3710; palm_bk3710_port_info.udma_mask = rate < 100000000 ? ATA_UDMA4 : ATA_UDMA5; rc = ide_host_add(&palm_bk3710_port_info, hws, NULL); if (rc) goto out; return 0; out: printk(KERN_WARNING "Palm Chip BK3710 IDE Register Fail\n"); return rc; } /* work with hotplug and coldplug */ MODULE_ALIAS("platform:palm_bk3710"); static struct platform_driver platform_bk_driver = { .driver = { .name = "palm_bk3710", .owner = THIS_MODULE, }, }; static int __init palm_bk3710_init(void) { return platform_driver_probe(&platform_bk_driver, palm_bk3710_probe); } module_init(palm_bk3710_init); MODULE_LICENSE("GPL");