/* * pata_ali.c - ALI 15x3 PATA for new ATA layer * (C) 2005 Red Hat Inc * Alan Cox <alan@redhat.com> * * based in part upon * linux/drivers/ide/pci/alim15x3.c Version 0.17 2003/01/02 * * Copyright (C) 1998-2000 Michel Aubry, Maintainer * Copyright (C) 1998-2000 Andrzej Krzysztofowicz, Maintainer * Copyright (C) 1999-2000 CJ, cjtsai@ali.com.tw, Maintainer * * Copyright (C) 1998-2000 Andre Hedrick (andre@linux-ide.org) * May be copied or modified under the terms of the GNU General Public License * Copyright (C) 2002 Alan Cox <alan@redhat.com> * ALi (now ULi M5228) support by Clear Zhang <Clear.Zhang@ali.com.tw> * * Documentation * Chipset documentation available under NDA only * * TODO/CHECK * Cannot have ATAPI on both master & slave for rev < c2 (???) but * otherwise should do atapi DMA. */ #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 <scsi/scsi_host.h> #include <linux/libata.h> #include <linux/dmi.h> #define DRV_NAME "pata_ali" #define DRV_VERSION "0.7.2" /* * Cable special cases */ static struct dmi_system_id cable_dmi_table[] = { { .ident = "HP Pavilion N5430", .matches = { DMI_MATCH(DMI_BOARD_VENDOR, "Hewlett-Packard"), DMI_MATCH(DMI_BOARD_NAME, "OmniBook N32N-736"), }, }, { } }; static int ali_cable_override(struct pci_dev *pdev) { /* Fujitsu P2000 */ if (pdev->subsystem_vendor == 0x10CF && pdev->subsystem_device == 0x10AF) return 1; /* Systems by DMI */ if (dmi_check_system(cable_dmi_table)) return 1; return 0; } /** * ali_c2_cable_detect - cable detection * @ap: ATA port * * Perform cable detection for C2 and later revisions */ static int ali_c2_cable_detect(struct ata_port *ap) { struct pci_dev *pdev = to_pci_dev(ap->host->dev); u8 ata66; /* Certain laptops use short but suitable cables and don't implement the detect logic */ if (ali_cable_override(pdev)) return ATA_CBL_PATA40_SHORT; /* Host view cable detect 0x4A bit 0 primary bit 1 secondary Bit set for 40 pin */ pci_read_config_byte(pdev, 0x4A, &ata66); if (ata66 & (1 << ap->port_no)) return ATA_CBL_PATA40; else return ATA_CBL_PATA80; } /** * ali_early_error_handler - reset for eary chip * @ap: ATA port * * Handle the reset callback for the later chips with cable detect */ static int ali_c2_pre_reset(struct ata_port *ap) { ap->cbl = ali_c2_cable_detect(ap); return ata_std_prereset(ap); } static void ali_c2_error_handler(struct ata_port *ap) { ata_bmdma_drive_eh(ap, ali_c2_pre_reset, ata_std_softreset, NULL, ata_std_postreset); } /** * ali_early_cable_detect - cable detection * @ap: ATA port * * Perform cable detection for older chipsets. This turns out to be * rather easy to implement */ static int ali_early_cable_detect(struct ata_port *ap) { return ATA_CBL_PATA40; } /** * ali_early_probe_init - reset for early chip * @ap: ATA port * * Handle the reset callback for the early (pre cable detect) chips. */ static int ali_early_pre_reset(struct ata_port *ap) { ap->cbl = ali_early_cable_detect(ap); return ata_std_prereset(ap); } static void ali_early_error_handler(struct ata_port *ap) { return ata_bmdma_drive_eh(ap, ali_early_pre_reset, ata_std_softreset, NULL, ata_std_postreset); } /** * ali_20_filter - filter for earlier ALI DMA * @ap: ALi ATA port * @adev: attached device * * Ensure that we do not do DMA on CD devices. We may be able to * fix that later on. Also ensure we do not do UDMA on WDC drives */ static unsigned long ali_20_filter(const struct ata_port *ap, struct ata_device *adev, unsigned long mask) { char model_num[ATA_ID_PROD_LEN + 1]; /* No DMA on anything but a disk for now */ if (adev->class != ATA_DEV_ATA) mask &= ~(ATA_MASK_MWDMA | ATA_MASK_UDMA); ata_id_c_string(adev->id, model_num, ATA_ID_PROD, sizeof(model_num)); if (strstr(model_num, "WDC")) return mask &= ~ATA_MASK_UDMA; return ata_pci_default_filter(ap, adev, mask); } /** * ali_fifo_control - FIFO manager * @ap: ALi channel to control * @adev: device for FIFO control * @on: 0 for off 1 for on * * Enable or disable the FIFO on a given device. Because of the way the * ALi FIFO works it provides a boost on ATA disk but can be confused by * ATAPI and we must therefore manage it. */ static void ali_fifo_control(struct ata_port *ap, struct ata_device *adev, int on) { struct pci_dev *pdev = to_pci_dev(ap->host->dev); int pio_fifo = 0x54 + ap->port_no; u8 fifo; int shift = 4 * adev->devno; /* ATA - FIFO on set nibble to 0x05, ATAPI - FIFO off, set nibble to 0x00. Not all the docs agree but the behaviour we now use is the one stated in the BIOS Programming Guide */ pci_read_config_byte(pdev, pio_fifo, &fifo); fifo &= ~(0x0F << shift); if (on) fifo |= (on << shift); pci_write_config_byte(pdev, pio_fifo, fifo); } /** * ali_program_modes - load mode registers * @ap: ALi channel to load * @adev: Device the timing is for * @cmd: Command timing * @data: Data timing * @ultra: UDMA timing or zero for off * * Loads the timing registers for cmd/data and disable UDMA if * ultra is zero. If ultra is set then load and enable the UDMA * timing but do not touch the command/data timing. */ static void ali_program_modes(struct ata_port *ap, struct ata_device *adev, struct ata_timing *t, u8 ultra) { struct pci_dev *pdev = to_pci_dev(ap->host->dev); int cas = 0x58 + 4 * ap->port_no; /* Command timing */ int cbt = 0x59 + 4 * ap->port_no; /* Command timing */ int drwt = 0x5A + 4 * ap->port_no + adev->devno; /* R/W timing */ int udmat = 0x56 + ap->port_no; /* UDMA timing */ int shift = 4 * adev->devno; u8 udma; if (t != NULL) { t->setup = FIT(t->setup, 1, 8) & 7; t->act8b = FIT(t->act8b, 1, 8) & 7; t->rec8b = FIT(t->rec8b, 1, 16) & 15; t->active = FIT(t->active, 1, 8) & 7; t->recover = FIT(t->recover, 1, 16) & 15; pci_write_config_byte(pdev, cas, t->setup); pci_write_config_byte(pdev, cbt, (t->act8b << 4) | t->rec8b); pci_write_config_byte(pdev, drwt, (t->active << 4) | t->recover); } /* Set up the UDMA enable */ pci_read_config_byte(pdev, udmat, &udma); udma &= ~(0x0F << shift); udma |= ultra << shift; pci_write_config_byte(pdev, udmat, udma); } /** * ali_set_piomode - set initial PIO mode data * @ap: ATA interface * @adev: ATA device * * Program the ALi registers for PIO mode. FIXME: add timings for * PIO5. */ static void ali_set_piomode(struct ata_port *ap, struct ata_device *adev) { struct ata_device *pair = ata_dev_pair(adev); struct ata_timing t; unsigned long T = 1000000000 / 33333; /* PCI clock based */ ata_timing_compute(adev, adev->pio_mode, &t, T, 1); if (pair) { struct ata_timing p; ata_timing_compute(pair, pair->pio_mode, &p, T, 1); ata_timing_merge(&p, &t, &t, ATA_TIMING_SETUP|ATA_TIMING_8BIT); if (pair->dma_mode) { ata_timing_compute(pair, pair->dma_mode, &p, T, 1); ata_timing_merge(&p, &t, &t, ATA_TIMING_SETUP|ATA_TIMING_8BIT); } } /* PIO FIFO is only permitted on ATA disk */ if (adev->class != ATA_DEV_ATA) ali_fifo_control(ap, adev, 0x00); ali_program_modes(ap, adev, &t, 0); if (adev->class == ATA_DEV_ATA) ali_fifo_control(ap, adev, 0x05); } /** * ali_set_dmamode - set initial DMA mode data * @ap: ATA interface * @adev: ATA device * * FIXME: MWDMA timings */ static void ali_set_dmamode(struct ata_port *ap, struct ata_device *adev) { static u8 udma_timing[7] = { 0xC, 0xB, 0xA, 0x9, 0x8, 0xF, 0xD }; struct ata_device *pair = ata_dev_pair(adev); struct ata_timing t; unsigned long T = 1000000000 / 33333; /* PCI clock based */ struct pci_dev *pdev = to_pci_dev(ap->host->dev); if (adev->class == ATA_DEV_ATA) ali_fifo_control(ap, adev, 0x08); if (adev->dma_mode >= XFER_UDMA_0) { ali_program_modes(ap, adev, NULL, udma_timing[adev->dma_mode - XFER_UDMA_0]); if (adev->dma_mode >= XFER_UDMA_3) { u8 reg4b; pci_read_config_byte(pdev, 0x4B, ®4b); reg4b |= 1; pci_write_config_byte(pdev, 0x4B, reg4b); } } else { ata_timing_compute(adev, adev->dma_mode, &t, T, 1); if (pair) { struct ata_timing p; ata_timing_compute(pair, pair->pio_mode, &p, T, 1); ata_timing_merge(&p, &t, &t, ATA_TIMING_SETUP|ATA_TIMING_8BIT); if (pair->dma_mode) { ata_timing_compute(pair, pair->dma_mode, &p, T, 1); ata_timing_merge(&p, &t, &t, ATA_TIMING_SETUP|ATA_TIMING_8BIT); } } ali_program_modes(ap, adev, &t, 0); } } /** * ali_lock_sectors - Keep older devices to 255 sector mode * @ap: ATA port * @adev: Device * * Called during the bus probe for each device that is found. We use * this call to lock the sector count of the device to 255 or less on * older ALi controllers. If we didn't do this then large I/O's would * require LBA48 commands which the older ALi requires are issued by * slower PIO methods */ static void ali_lock_sectors(struct ata_port *ap, struct ata_device *adev) { adev->max_sectors = 255; } static struct scsi_host_template ali_sht = { .module = THIS_MODULE, .name = DRV_NAME, .ioctl = ata_scsi_ioctl, .queuecommand = ata_scsi_queuecmd, .can_queue = ATA_DEF_QUEUE, .this_id = ATA_SHT_THIS_ID, .sg_tablesize = LIBATA_MAX_PRD, .cmd_per_lun = ATA_SHT_CMD_PER_LUN, .emulated = ATA_SHT_EMULATED, .use_clustering = ATA_SHT_USE_CLUSTERING, .proc_name = DRV_NAME, .dma_boundary = ATA_DMA_BOUNDARY, .slave_configure = ata_scsi_slave_config, .slave_destroy = ata_scsi_slave_destroy, .bios_param = ata_std_bios_param, .resume = ata_scsi_device_resume, .suspend = ata_scsi_device_suspend, }; /* * Port operations for PIO only ALi */ static struct ata_port_operations ali_early_port_ops = { .port_disable = ata_port_disable, .set_piomode = ali_set_piomode, .tf_load = ata_tf_load, .tf_read = ata_tf_read, .check_status = ata_check_status, .exec_command = ata_exec_command, .dev_select = ata_std_dev_select, .freeze = ata_bmdma_freeze, .thaw = ata_bmdma_thaw, .error_handler = ali_early_error_handler, .post_internal_cmd = ata_bmdma_post_internal_cmd, .qc_prep = ata_qc_prep, .qc_issue = ata_qc_issue_prot, .data_xfer = ata_pio_data_xfer, .irq_handler = ata_interrupt, .irq_clear = ata_bmdma_irq_clear, .port_start = ata_port_start, }; /* * Port operations for DMA capable ALi without cable * detect */ static struct ata_port_operations ali_20_port_ops = { .port_disable = ata_port_disable, .set_piomode = ali_set_piomode, .set_dmamode = ali_set_dmamode, .mode_filter = ali_20_filter, .tf_load = ata_tf_load, .tf_read = ata_tf_read, .check_status = ata_check_status, .exec_command = ata_exec_command, .dev_select = ata_std_dev_select, .dev_config = ali_lock_sectors, .freeze = ata_bmdma_freeze, .thaw = ata_bmdma_thaw, .error_handler = ali_early_error_handler, .post_internal_cmd = ata_bmdma_post_internal_cmd, .bmdma_setup = ata_bmdma_setup, .bmdma_start = ata_bmdma_start, .bmdma_stop = ata_bmdma_stop, .bmdma_status = ata_bmdma_status, .qc_prep = ata_qc_prep, .qc_issue = ata_qc_issue_prot, .data_xfer = ata_pio_data_xfer, .irq_handler = ata_interrupt, .irq_clear = ata_bmdma_irq_clear, .port_start = ata_port_start, }; /* * Port operations for DMA capable ALi with cable detect */ static struct ata_port_operations ali_c2_port_ops = { .port_disable = ata_port_disable, .set_piomode = ali_set_piomode, .set_dmamode = ali_set_dmamode, .mode_filter = ata_pci_default_filter, .tf_load = ata_tf_load, .tf_read = ata_tf_read, .check_status = ata_check_status, .exec_command = ata_exec_command, .dev_select = ata_std_dev_select, .dev_config = ali_lock_sectors, .freeze = ata_bmdma_freeze, .thaw = ata_bmdma_thaw, .error_handler = ali_c2_error_handler, .post_internal_cmd = ata_bmdma_post_internal_cmd, .bmdma_setup = ata_bmdma_setup, .bmdma_start = ata_bmdma_start, .bmdma_stop = ata_bmdma_stop, .bmdma_status = ata_bmdma_status, .qc_prep = ata_qc_prep, .qc_issue = ata_qc_issue_prot, .data_xfer = ata_pio_data_xfer, .irq_handler = ata_interrupt, .irq_clear = ata_bmdma_irq_clear, .port_start = ata_port_start, }; /* * Port operations for DMA capable ALi with cable detect and LBA48 */ static struct ata_port_operations ali_c5_port_ops = { .port_disable = ata_port_disable, .set_piomode = ali_set_piomode, .set_dmamode = ali_set_dmamode, .mode_filter = ata_pci_default_filter, .tf_load = ata_tf_load, .tf_read = ata_tf_read, .check_status = ata_check_status, .exec_command = ata_exec_command, .dev_select = ata_std_dev_select, .freeze = ata_bmdma_freeze, .thaw = ata_bmdma_thaw, .error_handler = ali_c2_error_handler, .post_internal_cmd = ata_bmdma_post_internal_cmd, .bmdma_setup = ata_bmdma_setup, .bmdma_start = ata_bmdma_start, .bmdma_stop = ata_bmdma_stop, .bmdma_status = ata_bmdma_status, .qc_prep = ata_qc_prep, .qc_issue = ata_qc_issue_prot, .data_xfer = ata_pio_data_xfer, .irq_handler = ata_interrupt, .irq_clear = ata_bmdma_irq_clear, .port_start = ata_port_start, }; /** * ali_init_chipset - chip setup function * @pdev: PCI device of ATA controller * * Perform the setup on the device that must be done both at boot * and at resume time. */ static void ali_init_chipset(struct pci_dev *pdev) { u8 rev, tmp; struct pci_dev *north, *isa_bridge; pci_read_config_byte(pdev, PCI_REVISION_ID, &rev); /* * The chipset revision selects the driver operations and * mode data. */ if (rev >= 0x20 && rev < 0xC2) { /* 1543-E/F, 1543C-C, 1543C-D, 1543C-E */ pci_read_config_byte(pdev, 0x4B, &tmp); /* Clear CD-ROM DMA write bit */ tmp &= 0x7F; pci_write_config_byte(pdev, 0x4B, tmp); } else if (rev >= 0xC2) { /* Enable cable detection logic */ pci_read_config_byte(pdev, 0x4B, &tmp); pci_write_config_byte(pdev, 0x4B, tmp | 0x08); } north = pci_get_bus_and_slot(0, PCI_DEVFN(0,0)); isa_bridge = pci_get_device(PCI_VENDOR_ID_AL, PCI_DEVICE_ID_AL_M1533, NULL); if (north && north->vendor == PCI_VENDOR_ID_AL && isa_bridge) { /* Configure the ALi bridge logic. For non ALi rely on BIOS. Set the south bridge enable bit */ pci_read_config_byte(isa_bridge, 0x79, &tmp); if (rev == 0xC2) pci_write_config_byte(isa_bridge, 0x79, tmp | 0x04); else if (rev > 0xC2 && rev < 0xC5) pci_write_config_byte(isa_bridge, 0x79, tmp | 0x02); } if (rev >= 0x20) { /* * CD_ROM DMA on (0x53 bit 0). Enable this even if we want * to use PIO. 0x53 bit 1 (rev 20 only) - enable FIFO control * via 0x54/55. */ pci_read_config_byte(pdev, 0x53, &tmp); if (rev <= 0x20) tmp &= ~0x02; if (rev >= 0xc7) tmp |= 0x03; else tmp |= 0x01; /* CD_ROM enable for DMA */ pci_write_config_byte(pdev, 0x53, tmp); } pci_dev_put(isa_bridge); pci_dev_put(north); ata_pci_clear_simplex(pdev); } /** * ali_init_one - discovery callback * @pdev: PCI device ID * @id: PCI table info * * An ALi IDE interface has been discovered. Figure out what revision * and perform configuration work before handing it to the ATA layer */ static int ali_init_one(struct pci_dev *pdev, const struct pci_device_id *id) { static struct ata_port_info info_early = { .sht = &ali_sht, .flags = ATA_FLAG_SLAVE_POSS | ATA_FLAG_SRST, .pio_mask = 0x1f, .port_ops = &ali_early_port_ops }; /* Revision 0x20 added DMA */ static struct ata_port_info info_20 = { .sht = &ali_sht, .flags = ATA_FLAG_SLAVE_POSS | ATA_FLAG_SRST | ATA_FLAG_PIO_LBA48, .pio_mask = 0x1f, .mwdma_mask = 0x07, .port_ops = &ali_20_port_ops }; /* Revision 0x20 with support logic added UDMA */ static struct ata_port_info info_20_udma = { .sht = &ali_sht, .flags = ATA_FLAG_SLAVE_POSS | ATA_FLAG_SRST | ATA_FLAG_PIO_LBA48, .pio_mask = 0x1f, .mwdma_mask = 0x07, .udma_mask = 0x07, /* UDMA33 */ .port_ops = &ali_20_port_ops }; /* Revision 0xC2 adds UDMA66 */ static struct ata_port_info info_c2 = { .sht = &ali_sht, .flags = ATA_FLAG_SLAVE_POSS | ATA_FLAG_SRST | ATA_FLAG_PIO_LBA48, .pio_mask = 0x1f, .mwdma_mask = 0x07, .udma_mask = 0x1f, .port_ops = &ali_c2_port_ops }; /* Revision 0xC3 is UDMA100 */ static struct ata_port_info info_c3 = { .sht = &ali_sht, .flags = ATA_FLAG_SLAVE_POSS | ATA_FLAG_SRST | ATA_FLAG_PIO_LBA48, .pio_mask = 0x1f, .mwdma_mask = 0x07, .udma_mask = 0x3f, .port_ops = &ali_c2_port_ops }; /* Revision 0xC4 is UDMA133 */ static struct ata_port_info info_c4 = { .sht = &ali_sht, .flags = ATA_FLAG_SLAVE_POSS | ATA_FLAG_SRST | ATA_FLAG_PIO_LBA48, .pio_mask = 0x1f, .mwdma_mask = 0x07, .udma_mask = 0x7f, .port_ops = &ali_c2_port_ops }; /* Revision 0xC5 is UDMA133 with LBA48 DMA */ static struct ata_port_info info_c5 = { .sht = &ali_sht, .flags = ATA_FLAG_SLAVE_POSS | ATA_FLAG_SRST, .pio_mask = 0x1f, .mwdma_mask = 0x07, .udma_mask = 0x7f, .port_ops = &ali_c5_port_ops }; static struct ata_port_info *port_info[2]; u8 rev, tmp; struct pci_dev *isa_bridge; pci_read_config_byte(pdev, PCI_REVISION_ID, &rev); /* * The chipset revision selects the driver operations and * mode data. */ if (rev < 0x20) { port_info[0] = port_info[1] = &info_early; } else if (rev < 0xC2) { port_info[0] = port_info[1] = &info_20; } else if (rev == 0xC2) { port_info[0] = port_info[1] = &info_c2; } else if (rev == 0xC3) { port_info[0] = port_info[1] = &info_c3; } else if (rev == 0xC4) { port_info[0] = port_info[1] = &info_c4; } else port_info[0] = port_info[1] = &info_c5; ali_init_chipset(pdev); isa_bridge = pci_get_device(PCI_VENDOR_ID_AL, PCI_DEVICE_ID_AL_M1533, NULL); if (isa_bridge && rev >= 0x20 && rev < 0xC2) { /* Are we paired with a UDMA capable chip */ pci_read_config_byte(isa_bridge, 0x5E, &tmp); if ((tmp & 0x1E) == 0x12) port_info[0] = port_info[1] = &info_20_udma; pci_dev_put(isa_bridge); } return ata_pci_init_one(pdev, port_info, 2); } static int ali_reinit_one(struct pci_dev *pdev) { ali_init_chipset(pdev); return ata_pci_device_resume(pdev); } static const struct pci_device_id ali[] = { { PCI_VDEVICE(AL, PCI_DEVICE_ID_AL_M5228), }, { PCI_VDEVICE(AL, PCI_DEVICE_ID_AL_M5229), }, { }, }; static struct pci_driver ali_pci_driver = { .name = DRV_NAME, .id_table = ali, .probe = ali_init_one, .remove = ata_pci_remove_one, .suspend = ata_pci_device_suspend, .resume = ali_reinit_one, }; static int __init ali_init(void) { return pci_register_driver(&ali_pci_driver); } static void __exit ali_exit(void) { pci_unregister_driver(&ali_pci_driver); } MODULE_AUTHOR("Alan Cox"); MODULE_DESCRIPTION("low-level driver for ALi PATA"); MODULE_LICENSE("GPL"); MODULE_DEVICE_TABLE(pci, ali); MODULE_VERSION(DRV_VERSION); module_init(ali_init); module_exit(ali_exit);