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drivers/ata/pata_artop.c
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/* * pata_artop.c - ARTOP ATA controller driver * |
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* (C) 2006 Red Hat |
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* (C) 2007,2011 Bartlomiej Zolnierkiewicz |
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* * Based in part on drivers/ide/pci/aec62xx.c * Copyright (C) 1999-2002 Andre Hedrick <andre@linux-ide.org> * 865/865R fixes for Macintosh card version from a patch to the old * driver by Thibaut VARENE <varenet@parisc-linux.org> * When setting the PCI latency we must set 0x80 or higher for burst * performance Alessandro Zummo <alessandro.zummo@towertech.it> * * TODO |
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* Investigate no_dsc on 850R * Clock detect */ #include <linux/kernel.h> #include <linux/module.h> #include <linux/pci.h> #include <linux/init.h> #include <linux/blkdev.h> #include <linux/delay.h> #include <linux/device.h> #include <scsi/scsi_host.h> #include <linux/libata.h> #include <linux/ata.h> #define DRV_NAME "pata_artop" |
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#define DRV_VERSION "0.4.6" |
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/* * The ARTOP has 33 Mhz and "over clocked" timing tables. Until we * get PCI bus speed functionality we leave this as 0. Its a variable * for when we get the functionality and also for folks wanting to * test stuff. */ static int clock = 0; |
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/** |
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* artop62x0_pre_reset - probe begin |
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* @link: link |
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* @deadline: deadline jiffies for the operation |
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* |
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* Nothing complicated needed here. */ |
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static int artop62x0_pre_reset(struct ata_link *link, unsigned long deadline) |
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{ static const struct pci_bits artop_enable_bits[] = { { 0x4AU, 1U, 0x02UL, 0x02UL }, /* port 0 */ { 0x4AU, 1U, 0x04UL, 0x04UL }, /* port 1 */ }; |
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struct ata_port *ap = link->ap; |
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struct pci_dev *pdev = to_pci_dev(ap->host->dev); |
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/* Odd numbered device ids are the units with enable bits. */ |
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if ((pdev->device & 1) && !pci_test_config_bits(pdev, &artop_enable_bits[ap->port_no])) |
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return -ENOENT; |
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return ata_sff_prereset(link, deadline); |
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} |
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/** * artop6260_cable_detect - identify cable type * @ap: Port * |
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* Identify the cable type for the ARTOP interface in question |
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*/ |
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static int artop6260_cable_detect(struct ata_port *ap) { struct pci_dev *pdev = to_pci_dev(ap->host->dev); u8 tmp; |
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pci_read_config_byte(pdev, 0x49, &tmp); |
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if (tmp & (1 << ap->port_no)) |
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return ATA_CBL_PATA40; return ATA_CBL_PATA80; |
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} /** |
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* artop6210_load_piomode - Load a set of PATA PIO timings * @ap: Port whose timings we are configuring * @adev: Device * @pio: PIO mode * * Set PIO mode for device, in host controller PCI config space. This * is used both to set PIO timings in PIO mode and also to set the * matching PIO clocking for UDMA, as well as the MWDMA timings. * * LOCKING: * None (inherited from caller). */ static void artop6210_load_piomode(struct ata_port *ap, struct ata_device *adev, unsigned int pio) { struct pci_dev *pdev = to_pci_dev(ap->host->dev); int dn = adev->devno + 2 * ap->port_no; const u16 timing[2][5] = { { 0x0000, 0x000A, 0x0008, 0x0303, 0x0301 }, { 0x0700, 0x070A, 0x0708, 0x0403, 0x0401 } }; /* Load the PIO timing active/recovery bits */ pci_write_config_word(pdev, 0x40 + 2 * dn, timing[clock][pio]); } /** * artop6210_set_piomode - Initialize host controller PATA PIO timings * @ap: Port whose timings we are configuring * @adev: Device we are configuring * * Set PIO mode for device, in host controller PCI config space. For * ARTOP we must also clear the UDMA bits if we are not doing UDMA. In * the event UDMA is used the later call to set_dmamode will set the * bits as required. * * LOCKING: * None (inherited from caller). */ static void artop6210_set_piomode(struct ata_port *ap, struct ata_device *adev) { struct pci_dev *pdev = to_pci_dev(ap->host->dev); int dn = adev->devno + 2 * ap->port_no; u8 ultra; artop6210_load_piomode(ap, adev, adev->pio_mode - XFER_PIO_0); /* Clear the UDMA mode bits (set_dmamode will redo this if needed) */ pci_read_config_byte(pdev, 0x54, &ultra); ultra &= ~(3 << (2 * dn)); pci_write_config_byte(pdev, 0x54, ultra); } /** * artop6260_load_piomode - Initialize host controller PATA PIO timings * @ap: Port whose timings we are configuring * @adev: Device we are configuring * @pio: PIO mode * * Set PIO mode for device, in host controller PCI config space. The * ARTOP6260 and relatives store the timing data differently. * * LOCKING: * None (inherited from caller). */ static void artop6260_load_piomode (struct ata_port *ap, struct ata_device *adev, unsigned int pio) { struct pci_dev *pdev = to_pci_dev(ap->host->dev); int dn = adev->devno + 2 * ap->port_no; const u8 timing[2][5] = { { 0x00, 0x0A, 0x08, 0x33, 0x31 }, { 0x70, 0x7A, 0x78, 0x43, 0x41 } }; /* Load the PIO timing active/recovery bits */ pci_write_config_byte(pdev, 0x40 + dn, timing[clock][pio]); } /** * artop6260_set_piomode - Initialize host controller PATA PIO timings * @ap: Port whose timings we are configuring * @adev: Device we are configuring * * Set PIO mode for device, in host controller PCI config space. For * ARTOP we must also clear the UDMA bits if we are not doing UDMA. In * the event UDMA is used the later call to set_dmamode will set the * bits as required. * * LOCKING: * None (inherited from caller). */ static void artop6260_set_piomode(struct ata_port *ap, struct ata_device *adev) { struct pci_dev *pdev = to_pci_dev(ap->host->dev); u8 ultra; artop6260_load_piomode(ap, adev, adev->pio_mode - XFER_PIO_0); /* Clear the UDMA mode bits (set_dmamode will redo this if needed) */ pci_read_config_byte(pdev, 0x44 + ap->port_no, &ultra); ultra &= ~(7 << (4 * adev->devno)); /* One nibble per drive */ pci_write_config_byte(pdev, 0x44 + ap->port_no, ultra); } /** * artop6210_set_dmamode - Initialize host controller PATA PIO timings * @ap: Port whose timings we are configuring |
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* @adev: Device whose timings we are configuring |
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* * Set DMA mode for device, in host controller PCI config space. * * LOCKING: * None (inherited from caller). */ static void artop6210_set_dmamode (struct ata_port *ap, struct ata_device *adev) { unsigned int pio; struct pci_dev *pdev = to_pci_dev(ap->host->dev); int dn = adev->devno + 2 * ap->port_no; u8 ultra; if (adev->dma_mode == XFER_MW_DMA_0) pio = 1; else pio = 4; /* Load the PIO timing active/recovery bits */ artop6210_load_piomode(ap, adev, pio); pci_read_config_byte(pdev, 0x54, &ultra); ultra &= ~(3 << (2 * dn)); /* Add ultra DMA bits if in UDMA mode */ if (adev->dma_mode >= XFER_UDMA_0) { u8 mode = (adev->dma_mode - XFER_UDMA_0) + 1 - clock; if (mode == 0) mode = 1; ultra |= (mode << (2 * dn)); } pci_write_config_byte(pdev, 0x54, ultra); } /** * artop6260_set_dmamode - Initialize host controller PATA PIO timings * @ap: Port whose timings we are configuring * @adev: Device we are configuring * * Set DMA mode for device, in host controller PCI config space. The * ARTOP6260 and relatives store the timing data differently. * * LOCKING: * None (inherited from caller). */ static void artop6260_set_dmamode (struct ata_port *ap, struct ata_device *adev) { unsigned int pio = adev->pio_mode - XFER_PIO_0; struct pci_dev *pdev = to_pci_dev(ap->host->dev); u8 ultra; if (adev->dma_mode == XFER_MW_DMA_0) pio = 1; else pio = 4; /* Load the PIO timing active/recovery bits */ artop6260_load_piomode(ap, adev, pio); /* Add ultra DMA bits if in UDMA mode */ pci_read_config_byte(pdev, 0x44 + ap->port_no, &ultra); ultra &= ~(7 << (4 * adev->devno)); /* One nibble per drive */ if (adev->dma_mode >= XFER_UDMA_0) { u8 mode = adev->dma_mode - XFER_UDMA_0 + 1 - clock; if (mode == 0) mode = 1; ultra |= (mode << (4 * adev->devno)); } pci_write_config_byte(pdev, 0x44 + ap->port_no, ultra); } |
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/** * artop_6210_qc_defer - implement serialization * @qc: command * * Issue commands per host on this chip. */ static int artop6210_qc_defer(struct ata_queued_cmd *qc) { struct ata_host *host = qc->ap->host; struct ata_port *alt = host->ports[1 ^ qc->ap->port_no]; int rc; /* First apply the usual rules */ rc = ata_std_qc_defer(qc); if (rc != 0) return rc; /* Now apply serialization rules. Only allow a command if the other channel state machine is idle */ if (alt && alt->qc_active) return ATA_DEFER_PORT; return 0; } |
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static struct scsi_host_template artop_sht = { |
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ATA_BMDMA_SHT(DRV_NAME), |
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}; |
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static struct ata_port_operations artop6210_ops = { .inherits = &ata_bmdma_port_ops, .cable_detect = ata_cable_40wire, |
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.set_piomode = artop6210_set_piomode, .set_dmamode = artop6210_set_dmamode, |
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.prereset = artop62x0_pre_reset, |
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.qc_defer = artop6210_qc_defer, |
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}; |
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static struct ata_port_operations artop6260_ops = { .inherits = &ata_bmdma_port_ops, .cable_detect = artop6260_cable_detect, |
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.set_piomode = artop6260_set_piomode, .set_dmamode = artop6260_set_dmamode, |
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.prereset = artop62x0_pre_reset, |
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}; |
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static void atp8xx_fixup(struct pci_dev *pdev) { if (pdev->device == 0x0005) /* BIOS may have left us in UDMA, clear it before libata probe */ pci_write_config_byte(pdev, 0x54, 0); else if (pdev->device == 0x0008 || pdev->device == 0x0009) { u8 reg; /* Mac systems come up with some registers not set as we will need them */ /* Clear reset & test bits */ pci_read_config_byte(pdev, 0x49, ®); pci_write_config_byte(pdev, 0x49, reg & ~0x30); /* PCI latency must be > 0x80 for burst mode, tweak it * if required. */ pci_read_config_byte(pdev, PCI_LATENCY_TIMER, ®); if (reg <= 0x80) pci_write_config_byte(pdev, PCI_LATENCY_TIMER, 0x90); /* Enable IRQ output and burst mode */ pci_read_config_byte(pdev, 0x4a, ®); pci_write_config_byte(pdev, 0x4a, (reg & ~0x01) | 0x80); } } |
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/** * artop_init_one - Register ARTOP ATA PCI device with kernel services * @pdev: PCI device to register * @ent: Entry in artop_pci_tbl matching with @pdev * * Called from kernel PCI layer. * * LOCKING: * Inherited from PCI layer (may sleep). * * RETURNS: * Zero on success, or -ERRNO value. */ static int artop_init_one (struct pci_dev *pdev, const struct pci_device_id *id) { |
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static const struct ata_port_info info_6210 = { |
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.flags = ATA_FLAG_SLAVE_POSS, |
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.pio_mask = ATA_PIO4, .mwdma_mask = ATA_MWDMA2, |
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.udma_mask = ATA_UDMA2, .port_ops = &artop6210_ops, }; |
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static const struct ata_port_info info_626x = { |
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.flags = ATA_FLAG_SLAVE_POSS, |
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.pio_mask = ATA_PIO4, .mwdma_mask = ATA_MWDMA2, |
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.udma_mask = ATA_UDMA4, .port_ops = &artop6260_ops, }; |
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static const struct ata_port_info info_628x = { |
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.flags = ATA_FLAG_SLAVE_POSS, |
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.pio_mask = ATA_PIO4, .mwdma_mask = ATA_MWDMA2, |
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.udma_mask = ATA_UDMA5, .port_ops = &artop6260_ops, }; |
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static const struct ata_port_info info_628x_fast = { |
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.flags = ATA_FLAG_SLAVE_POSS, |
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.pio_mask = ATA_PIO4, .mwdma_mask = ATA_MWDMA2, |
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.udma_mask = ATA_UDMA6, .port_ops = &artop6260_ops, }; |
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const struct ata_port_info *ppi[] = { NULL, NULL }; |
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int rc; |
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ata_print_version_once(&pdev->dev, DRV_VERSION); |
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rc = pcim_enable_device(pdev); if (rc) return rc; |
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if (id->driver_data == 0) /* 6210 variant */ |
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ppi[0] = &info_6210; |
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else if (id->driver_data == 1) /* 6260 */ |
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ppi[0] = &info_626x; |
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else if (id->driver_data == 2) { /* 6280 or 6280 + fast */ |
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unsigned long io = pci_resource_start(pdev, 4); |
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ppi[0] = &info_628x; |
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if (inb(io) & 0x10) |
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ppi[0] = &info_628x_fast; |
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} |
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BUG_ON(ppi[0] == NULL); |
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atp8xx_fixup(pdev); |
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return ata_pci_bmdma_init_one(pdev, ppi, &artop_sht, NULL, 0); |
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} static const struct pci_device_id artop_pci_tbl[] = { |
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{ PCI_VDEVICE(ARTOP, 0x0005), 0 }, { PCI_VDEVICE(ARTOP, 0x0006), 1 }, { PCI_VDEVICE(ARTOP, 0x0007), 1 }, { PCI_VDEVICE(ARTOP, 0x0008), 2 }, { PCI_VDEVICE(ARTOP, 0x0009), 2 }, |
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{ } /* terminate list */ }; |
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#ifdef CONFIG_PM static int atp8xx_reinit_one(struct pci_dev *pdev) { struct ata_host *host = dev_get_drvdata(&pdev->dev); int rc; rc = ata_pci_device_do_resume(pdev); if (rc) return rc; atp8xx_fixup(pdev); ata_host_resume(host); return 0; } #endif |
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static struct pci_driver artop_pci_driver = { .name = DRV_NAME, .id_table = artop_pci_tbl, .probe = artop_init_one, .remove = ata_pci_remove_one, |
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#ifdef CONFIG_PM .suspend = ata_pci_device_suspend, .resume = atp8xx_reinit_one, #endif |
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}; |
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module_pci_driver(artop_pci_driver); |
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MODULE_AUTHOR("Alan Cox, Bartlomiej Zolnierkiewicz"); |
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MODULE_DESCRIPTION("SCSI low-level driver for ARTOP PATA"); MODULE_LICENSE("GPL"); MODULE_DEVICE_TABLE(pci, artop_pci_tbl); MODULE_VERSION(DRV_VERSION); |