/* * Support for IDE interfaces on Celleb platform * * (C) Copyright 2006 TOSHIBA CORPORATION * * This code is based on drivers/ide/pci/siimage.c: * Copyright (C) 2001-2002 Andre Hedrick * Copyright (C) 2003 Red Hat * * 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., * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. */ #include #include #include #include #include #include #include #define PCI_DEVICE_ID_TOSHIBA_SCC_ATA 0x01b4 #define SCC_PATA_NAME "scc IDE" #define TDVHSEL_MASTER 0x00000001 #define TDVHSEL_SLAVE 0x00000004 #define MODE_JCUSFEN 0x00000080 #define CCKCTRL_ATARESET 0x00040000 #define CCKCTRL_BUFCNT 0x00020000 #define CCKCTRL_CRST 0x00010000 #define CCKCTRL_OCLKEN 0x00000100 #define CCKCTRL_ATACLKOEN 0x00000002 #define CCKCTRL_LCLKEN 0x00000001 #define QCHCD_IOS_SS 0x00000001 #define QCHSD_STPDIAG 0x00020000 #define INTMASK_MSK 0xD1000012 #define INTSTS_SERROR 0x80000000 #define INTSTS_PRERR 0x40000000 #define INTSTS_RERR 0x10000000 #define INTSTS_ICERR 0x01000000 #define INTSTS_BMSINT 0x00000010 #define INTSTS_BMHE 0x00000008 #define INTSTS_IOIRQS 0x00000004 #define INTSTS_INTRQ 0x00000002 #define INTSTS_ACTEINT 0x00000001 #define ECMODE_VALUE 0x01 static struct scc_ports { unsigned long ctl, dma; ide_hwif_t *hwif; /* for removing port from system */ } scc_ports[MAX_HWIFS]; /* PIO transfer mode table */ /* JCHST */ static unsigned long JCHSTtbl[2][7] = { {0x0E, 0x05, 0x02, 0x03, 0x02, 0x00, 0x00}, /* 100MHz */ {0x13, 0x07, 0x04, 0x04, 0x03, 0x00, 0x00} /* 133MHz */ }; /* JCHHT */ static unsigned long JCHHTtbl[2][7] = { {0x0E, 0x02, 0x02, 0x02, 0x02, 0x00, 0x00}, /* 100MHz */ {0x13, 0x03, 0x03, 0x03, 0x03, 0x00, 0x00} /* 133MHz */ }; /* JCHCT */ static unsigned long JCHCTtbl[2][7] = { {0x1D, 0x1D, 0x1C, 0x0B, 0x06, 0x00, 0x00}, /* 100MHz */ {0x27, 0x26, 0x26, 0x0E, 0x09, 0x00, 0x00} /* 133MHz */ }; /* DMA transfer mode table */ /* JCHDCTM/JCHDCTS */ static unsigned long JCHDCTxtbl[2][7] = { {0x0A, 0x06, 0x04, 0x03, 0x01, 0x00, 0x00}, /* 100MHz */ {0x0E, 0x09, 0x06, 0x04, 0x02, 0x01, 0x00} /* 133MHz */ }; /* JCSTWTM/JCSTWTS */ static unsigned long JCSTWTxtbl[2][7] = { {0x06, 0x04, 0x03, 0x02, 0x02, 0x02, 0x00}, /* 100MHz */ {0x09, 0x06, 0x04, 0x02, 0x02, 0x02, 0x02} /* 133MHz */ }; /* JCTSS */ static unsigned long JCTSStbl[2][7] = { {0x05, 0x05, 0x05, 0x05, 0x05, 0x05, 0x00}, /* 100MHz */ {0x05, 0x05, 0x05, 0x05, 0x05, 0x05, 0x05} /* 133MHz */ }; /* JCENVT */ static unsigned long JCENVTtbl[2][7] = { {0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x00}, /* 100MHz */ {0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02} /* 133MHz */ }; /* JCACTSELS/JCACTSELM */ static unsigned long JCACTSELtbl[2][7] = { {0x00, 0x00, 0x00, 0x00, 0x01, 0x01, 0x00}, /* 100MHz */ {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01} /* 133MHz */ }; static u8 scc_ide_inb(unsigned long port) { u32 data = in_be32((void*)port); return (u8)data; } static u16 scc_ide_inw(unsigned long port) { u32 data = in_be32((void*)port); return (u16)data; } static void scc_ide_insw(unsigned long port, void *addr, u32 count) { u16 *ptr = (u16 *)addr; while (count--) { *ptr++ = le16_to_cpu(in_be32((void*)port)); } } static void scc_ide_insl(unsigned long port, void *addr, u32 count) { u16 *ptr = (u16 *)addr; while (count--) { *ptr++ = le16_to_cpu(in_be32((void*)port)); *ptr++ = le16_to_cpu(in_be32((void*)port)); } } static void scc_ide_outb(u8 addr, unsigned long port) { out_be32((void*)port, addr); } static void scc_ide_outw(u16 addr, unsigned long port) { out_be32((void*)port, addr); } static void scc_ide_outbsync(ide_drive_t * drive, u8 addr, unsigned long port) { ide_hwif_t *hwif = HWIF(drive); out_be32((void*)port, addr); eieio(); in_be32((void*)(hwif->dma_base + 0x01c)); eieio(); } static void scc_ide_outsw(unsigned long port, void *addr, u32 count) { u16 *ptr = (u16 *)addr; while (count--) { out_be32((void*)port, cpu_to_le16(*ptr++)); } } static void scc_ide_outsl(unsigned long port, void *addr, u32 count) { u16 *ptr = (u16 *)addr; while (count--) { out_be32((void*)port, cpu_to_le16(*ptr++)); out_be32((void*)port, cpu_to_le16(*ptr++)); } } /** * scc_set_pio_mode - set host controller for PIO mode * @drive: drive * @pio: PIO mode number * * Load the timing settings for this device mode into the * controller. */ static void scc_set_pio_mode(ide_drive_t *drive, const u8 pio) { ide_hwif_t *hwif = HWIF(drive); struct scc_ports *ports = ide_get_hwifdata(hwif); unsigned long ctl_base = ports->ctl; unsigned long cckctrl_port = ctl_base + 0xff0; unsigned long piosht_port = ctl_base + 0x000; unsigned long pioct_port = ctl_base + 0x004; unsigned long reg; int offset; reg = in_be32((void __iomem *)cckctrl_port); if (reg & CCKCTRL_ATACLKOEN) { offset = 1; /* 133MHz */ } else { offset = 0; /* 100MHz */ } reg = JCHSTtbl[offset][pio] << 16 | JCHHTtbl[offset][pio]; out_be32((void __iomem *)piosht_port, reg); reg = JCHCTtbl[offset][pio]; out_be32((void __iomem *)pioct_port, reg); } /** * scc_set_dma_mode - set host controller for DMA mode * @drive: drive * @speed: DMA mode * * Load the timing settings for this device mode into the * controller. */ static void scc_set_dma_mode(ide_drive_t *drive, const u8 speed) { ide_hwif_t *hwif = HWIF(drive); struct scc_ports *ports = ide_get_hwifdata(hwif); unsigned long ctl_base = ports->ctl; unsigned long cckctrl_port = ctl_base + 0xff0; unsigned long mdmact_port = ctl_base + 0x008; unsigned long mcrcst_port = ctl_base + 0x00c; unsigned long sdmact_port = ctl_base + 0x010; unsigned long scrcst_port = ctl_base + 0x014; unsigned long udenvt_port = ctl_base + 0x018; unsigned long tdvhsel_port = ctl_base + 0x020; int is_slave = (&hwif->drives[1] == drive); int offset, idx; unsigned long reg; unsigned long jcactsel; reg = in_be32((void __iomem *)cckctrl_port); if (reg & CCKCTRL_ATACLKOEN) { offset = 1; /* 133MHz */ } else { offset = 0; /* 100MHz */ } idx = speed - XFER_UDMA_0; jcactsel = JCACTSELtbl[offset][idx]; if (is_slave) { out_be32((void __iomem *)sdmact_port, JCHDCTxtbl[offset][idx]); out_be32((void __iomem *)scrcst_port, JCSTWTxtbl[offset][idx]); jcactsel = jcactsel << 2; out_be32((void __iomem *)tdvhsel_port, (in_be32((void __iomem *)tdvhsel_port) & ~TDVHSEL_SLAVE) | jcactsel); } else { out_be32((void __iomem *)mdmact_port, JCHDCTxtbl[offset][idx]); out_be32((void __iomem *)mcrcst_port, JCSTWTxtbl[offset][idx]); out_be32((void __iomem *)tdvhsel_port, (in_be32((void __iomem *)tdvhsel_port) & ~TDVHSEL_MASTER) | jcactsel); } reg = JCTSStbl[offset][idx] << 16 | JCENVTtbl[offset][idx]; out_be32((void __iomem *)udenvt_port, reg); } /** * scc_ide_dma_setup - begin a DMA phase * @drive: target device * * Build an IDE DMA PRD (IDE speak for scatter gather table) * and then set up the DMA transfer registers. * * Returns 0 on success. If a PIO fallback is required then 1 * is returned. */ static int scc_dma_setup(ide_drive_t *drive) { ide_hwif_t *hwif = drive->hwif; struct request *rq = HWGROUP(drive)->rq; unsigned int reading; u8 dma_stat; if (rq_data_dir(rq)) reading = 0; else reading = 1 << 3; /* fall back to pio! */ if (!ide_build_dmatable(drive, rq)) { ide_map_sg(drive, rq); return 1; } /* PRD table */ out_be32((void __iomem *)hwif->dma_prdtable, hwif->dmatable_dma); /* specify r/w */ out_be32((void __iomem *)hwif->dma_command, reading); /* read dma_status for INTR & ERROR flags */ dma_stat = in_be32((void __iomem *)hwif->dma_status); /* clear INTR & ERROR flags */ out_be32((void __iomem *)hwif->dma_status, dma_stat|6); drive->waiting_for_dma = 1; return 0; } /** * scc_ide_dma_end - Stop DMA * @drive: IDE drive * * Check and clear INT Status register. * Then call __ide_dma_end(). */ static int scc_ide_dma_end(ide_drive_t * drive) { ide_hwif_t *hwif = HWIF(drive); unsigned long intsts_port = hwif->dma_base + 0x014; u32 reg; int dma_stat, data_loss = 0; static int retry = 0; /* errata A308 workaround: Step5 (check data loss) */ /* We don't check non ide_disk because it is limited to UDMA4 */ if (!(in_be32((void __iomem *)hwif->io_ports[IDE_ALTSTATUS_OFFSET]) & ERR_STAT) && drive->media == ide_disk && drive->current_speed > XFER_UDMA_4) { reg = in_be32((void __iomem *)intsts_port); if (!(reg & INTSTS_ACTEINT)) { printk(KERN_WARNING "%s: operation failed (transfer data loss)\n", drive->name); data_loss = 1; if (retry++) { struct request *rq = HWGROUP(drive)->rq; int unit; /* ERROR_RESET and drive->crc_count are needed * to reduce DMA transfer mode in retry process. */ if (rq) rq->errors |= ERROR_RESET; for (unit = 0; unit < MAX_DRIVES; unit++) { ide_drive_t *drive = &hwif->drives[unit]; drive->crc_count++; } } } } while (1) { reg = in_be32((void __iomem *)intsts_port); if (reg & INTSTS_SERROR) { printk(KERN_WARNING "%s: SERROR\n", SCC_PATA_NAME); out_be32((void __iomem *)intsts_port, INTSTS_SERROR|INTSTS_BMSINT); out_be32((void __iomem *)hwif->dma_command, in_be32((void __iomem *)hwif->dma_command) & ~QCHCD_IOS_SS); continue; } if (reg & INTSTS_PRERR) { u32 maea0, maec0; unsigned long ctl_base = hwif->config_data; maea0 = in_be32((void __iomem *)(ctl_base + 0xF50)); maec0 = in_be32((void __iomem *)(ctl_base + 0xF54)); printk(KERN_WARNING "%s: PRERR [addr:%x cmd:%x]\n", SCC_PATA_NAME, maea0, maec0); out_be32((void __iomem *)intsts_port, INTSTS_PRERR|INTSTS_BMSINT); out_be32((void __iomem *)hwif->dma_command, in_be32((void __iomem *)hwif->dma_command) & ~QCHCD_IOS_SS); continue; } if (reg & INTSTS_RERR) { printk(KERN_WARNING "%s: Response Error\n", SCC_PATA_NAME); out_be32((void __iomem *)intsts_port, INTSTS_RERR|INTSTS_BMSINT); out_be32((void __iomem *)hwif->dma_command, in_be32((void __iomem *)hwif->dma_command) & ~QCHCD_IOS_SS); continue; } if (reg & INTSTS_ICERR) { out_be32((void __iomem *)hwif->dma_command, in_be32((void __iomem *)hwif->dma_command) & ~QCHCD_IOS_SS); printk(KERN_WARNING "%s: Illegal Configuration\n", SCC_PATA_NAME); out_be32((void __iomem *)intsts_port, INTSTS_ICERR|INTSTS_BMSINT); continue; } if (reg & INTSTS_BMSINT) { printk(KERN_WARNING "%s: Internal Bus Error\n", SCC_PATA_NAME); out_be32((void __iomem *)intsts_port, INTSTS_BMSINT); ide_do_reset(drive); continue; } if (reg & INTSTS_BMHE) { out_be32((void __iomem *)intsts_port, INTSTS_BMHE); continue; } if (reg & INTSTS_ACTEINT) { out_be32((void __iomem *)intsts_port, INTSTS_ACTEINT); continue; } if (reg & INTSTS_IOIRQS) { out_be32((void __iomem *)intsts_port, INTSTS_IOIRQS); continue; } break; } dma_stat = __ide_dma_end(drive); if (data_loss) dma_stat |= 2; /* emulate DMA error (to retry command) */ return dma_stat; } /* returns 1 if dma irq issued, 0 otherwise */ static int scc_dma_test_irq(ide_drive_t *drive) { ide_hwif_t *hwif = HWIF(drive); u32 int_stat = in_be32((void __iomem *)hwif->dma_base + 0x014); /* SCC errata A252,A308 workaround: Step4 */ if ((in_be32((void __iomem *)hwif->io_ports[IDE_ALTSTATUS_OFFSET]) & ERR_STAT) && (int_stat & INTSTS_INTRQ)) return 1; /* SCC errata A308 workaround: Step5 (polling IOIRQS) */ if (int_stat & INTSTS_IOIRQS) return 1; if (!drive->waiting_for_dma) printk(KERN_WARNING "%s: (%s) called while not waiting\n", drive->name, __func__); return 0; } static u8 scc_udma_filter(ide_drive_t *drive) { ide_hwif_t *hwif = drive->hwif; u8 mask = hwif->ultra_mask; /* errata A308 workaround: limit non ide_disk drive to UDMA4 */ if ((drive->media != ide_disk) && (mask & 0xE0)) { printk(KERN_INFO "%s: limit %s to UDMA4\n", SCC_PATA_NAME, drive->name); mask = ATA_UDMA4; } return mask; } /** * setup_mmio_scc - map CTRL/BMID region * @dev: PCI device we are configuring * @name: device name * */ static int setup_mmio_scc (struct pci_dev *dev, const char *name) { unsigned long ctl_base = pci_resource_start(dev, 0); unsigned long dma_base = pci_resource_start(dev, 1); unsigned long ctl_size = pci_resource_len(dev, 0); unsigned long dma_size = pci_resource_len(dev, 1); void __iomem *ctl_addr; void __iomem *dma_addr; int i, ret; for (i = 0; i < MAX_HWIFS; i++) { if (scc_ports[i].ctl == 0) break; } if (i >= MAX_HWIFS) return -ENOMEM; ret = pci_request_selected_regions(dev, (1 << 2) - 1, name); if (ret < 0) { printk(KERN_ERR "%s: can't reserve resources\n", name); return ret; } if ((ctl_addr = ioremap(ctl_base, ctl_size)) == NULL) goto fail_0; if ((dma_addr = ioremap(dma_base, dma_size)) == NULL) goto fail_1; pci_set_master(dev); scc_ports[i].ctl = (unsigned long)ctl_addr; scc_ports[i].dma = (unsigned long)dma_addr; pci_set_drvdata(dev, (void *) &scc_ports[i]); return 1; fail_1: iounmap(ctl_addr); fail_0: return -ENOMEM; } static int scc_ide_setup_pci_device(struct pci_dev *dev, const struct ide_port_info *d) { struct scc_ports *ports = pci_get_drvdata(dev); ide_hwif_t *hwif = NULL; hw_regs_t hw; u8 idx[4] = { 0xff, 0xff, 0xff, 0xff }; int i; hwif = ide_find_port(); if (hwif == NULL) { printk(KERN_ERR "%s: too many IDE interfaces, " "no room in table\n", SCC_PATA_NAME); return -ENOMEM; } memset(&hw, 0, sizeof(hw)); for (i = IDE_DATA_OFFSET; i <= IDE_CONTROL_OFFSET; i++) hw.io_ports[i] = ports->dma + 0x20 + i * 4; hw.irq = dev->irq; hw.dev = &dev->dev; hw.chipset = ide_pci; ide_init_port_hw(hwif, &hw); hwif->dev = &dev->dev; idx[0] = hwif->index; ide_device_add(idx, d); return 0; } /** * init_setup_scc - set up an SCC PATA Controller * @dev: PCI device * @d: IDE port info * * Perform the initial set up for this device. */ static int __devinit init_setup_scc(struct pci_dev *dev, const struct ide_port_info *d) { unsigned long ctl_base; unsigned long dma_base; unsigned long cckctrl_port; unsigned long intmask_port; unsigned long mode_port; unsigned long ecmode_port; unsigned long dma_status_port; u32 reg = 0; struct scc_ports *ports; int rc; rc = pci_enable_device(dev); if (rc) goto end; rc = setup_mmio_scc(dev, d->name); if (rc < 0) goto end; ports = pci_get_drvdata(dev); ctl_base = ports->ctl; dma_base = ports->dma; cckctrl_port = ctl_base + 0xff0; intmask_port = dma_base + 0x010; mode_port = ctl_base + 0x024; ecmode_port = ctl_base + 0xf00; dma_status_port = dma_base + 0x004; /* controller initialization */ reg = 0; out_be32((void*)cckctrl_port, reg); reg |= CCKCTRL_ATACLKOEN; out_be32((void*)cckctrl_port, reg); reg |= CCKCTRL_LCLKEN | CCKCTRL_OCLKEN; out_be32((void*)cckctrl_port, reg); reg |= CCKCTRL_CRST; out_be32((void*)cckctrl_port, reg); for (;;) { reg = in_be32((void*)cckctrl_port); if (reg & CCKCTRL_CRST) break; udelay(5000); } reg |= CCKCTRL_ATARESET; out_be32((void*)cckctrl_port, reg); out_be32((void*)ecmode_port, ECMODE_VALUE); out_be32((void*)mode_port, MODE_JCUSFEN); out_be32((void*)intmask_port, INTMASK_MSK); rc = scc_ide_setup_pci_device(dev, d); end: return rc; } /** * init_mmio_iops_scc - set up the iops for MMIO * @hwif: interface to set up * */ static void __devinit init_mmio_iops_scc(ide_hwif_t *hwif) { struct pci_dev *dev = to_pci_dev(hwif->dev); struct scc_ports *ports = pci_get_drvdata(dev); unsigned long dma_base = ports->dma; ide_set_hwifdata(hwif, ports); hwif->INB = scc_ide_inb; hwif->INW = scc_ide_inw; hwif->INSW = scc_ide_insw; hwif->INSL = scc_ide_insl; hwif->OUTB = scc_ide_outb; hwif->OUTBSYNC = scc_ide_outbsync; hwif->OUTW = scc_ide_outw; hwif->OUTSW = scc_ide_outsw; hwif->OUTSL = scc_ide_outsl; hwif->dma_base = dma_base; hwif->config_data = ports->ctl; hwif->mmio = 1; } /** * init_iops_scc - set up iops * @hwif: interface to set up * * Do the basic setup for the SCC hardware interface * and then do the MMIO setup. */ static void __devinit init_iops_scc(ide_hwif_t *hwif) { struct pci_dev *dev = to_pci_dev(hwif->dev); hwif->hwif_data = NULL; if (pci_get_drvdata(dev) == NULL) return; init_mmio_iops_scc(hwif); } static u8 __devinit scc_cable_detect(ide_hwif_t *hwif) { return ATA_CBL_PATA80; } /** * init_hwif_scc - set up hwif * @hwif: interface to set up * * We do the basic set up of the interface structure. The SCC * requires several custom handlers so we override the default * ide DMA handlers appropriately. */ static void __devinit init_hwif_scc(ide_hwif_t *hwif) { struct scc_ports *ports = ide_get_hwifdata(hwif); ports->hwif = hwif; hwif->dma_command = hwif->dma_base; hwif->dma_status = hwif->dma_base + 0x04; hwif->dma_prdtable = hwif->dma_base + 0x08; /* PTERADD */ out_be32((void __iomem *)(hwif->dma_base + 0x018), hwif->dmatable_dma); hwif->dma_setup = scc_dma_setup; hwif->ide_dma_end = scc_ide_dma_end; hwif->ide_dma_test_irq = scc_dma_test_irq; if (in_be32((void __iomem *)(hwif->config_data + 0xff0)) & CCKCTRL_ATACLKOEN) hwif->ultra_mask = ATA_UDMA6; /* 133MHz */ else hwif->ultra_mask = ATA_UDMA5; /* 100MHz */ } static const struct ide_port_ops scc_port_ops = { .set_pio_mode = scc_set_pio_mode, .set_dma_mode = scc_set_dma_mode, .udma_filter = scc_udma_filter, .cable_detect = scc_cable_detect, }; #define DECLARE_SCC_DEV(name_str) \ { \ .name = name_str, \ .init_iops = init_iops_scc, \ .init_hwif = init_hwif_scc, \ .port_ops = &scc_port_ops, \ .host_flags = IDE_HFLAG_SINGLE, \ .pio_mask = ATA_PIO4, \ } static const struct ide_port_info scc_chipsets[] __devinitdata = { /* 0 */ DECLARE_SCC_DEV("sccIDE"), }; /** * scc_init_one - pci layer discovery entry * @dev: PCI device * @id: ident table entry * * Called by the PCI code when it finds an SCC PATA controller. * We then use the IDE PCI generic helper to do most of the work. */ static int __devinit scc_init_one(struct pci_dev *dev, const struct pci_device_id *id) { return init_setup_scc(dev, &scc_chipsets[id->driver_data]); } /** * scc_remove - pci layer remove entry * @dev: PCI device * * Called by the PCI code when it removes an SCC PATA controller. */ static void __devexit scc_remove(struct pci_dev *dev) { struct scc_ports *ports = pci_get_drvdata(dev); ide_hwif_t *hwif = ports->hwif; if (hwif->dmatable_cpu) { pci_free_consistent(dev, PRD_ENTRIES * PRD_BYTES, hwif->dmatable_cpu, hwif->dmatable_dma); hwif->dmatable_cpu = NULL; } ide_unregister(hwif->index); hwif->chipset = ide_unknown; iounmap((void*)ports->dma); iounmap((void*)ports->ctl); pci_release_selected_regions(dev, (1 << 2) - 1); memset(ports, 0, sizeof(*ports)); } static const struct pci_device_id scc_pci_tbl[] = { { PCI_VDEVICE(TOSHIBA_2, PCI_DEVICE_ID_TOSHIBA_SCC_ATA), 0 }, { 0, }, }; MODULE_DEVICE_TABLE(pci, scc_pci_tbl); static struct pci_driver driver = { .name = "SCC IDE", .id_table = scc_pci_tbl, .probe = scc_init_one, .remove = scc_remove, }; static int scc_ide_init(void) { return ide_pci_register_driver(&driver); } module_init(scc_ide_init); /* -- No exit code? static void scc_ide_exit(void) { ide_pci_unregister_driver(&driver); } module_exit(scc_ide_exit); */ MODULE_DESCRIPTION("PCI driver module for Toshiba SCC IDE"); MODULE_LICENSE("GPL");