/* * pata_sil680.c - SIL680 PATA for new ATA layer * (C) 2005 Red Hat Inc * Alan Cox <alan@redhat.com> * * based upon * * linux/drivers/ide/pci/siimage.c Version 1.07 Nov 30, 2003 * * Copyright (C) 2001-2002 Andre Hedrick <andre@linux-ide.org> * Copyright (C) 2003 Red Hat <alan@redhat.com> * * May be copied or modified under the terms of the GNU General Public License * * Documentation publically available. * * If you have strange problems with nVidia chipset systems please * see the SI support documentation and update your system BIOS * if neccessary * * TODO * If we know all our devices are LBA28 (or LBA28 sized) we could use * the command fifo mode. */ #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> #define DRV_NAME "pata_sil680" #define DRV_VERSION "0.4.1" /** * sil680_selreg - return register base * @hwif: interface * @r: config offset * * Turn a config register offset into the right address in either * PCI space or MMIO space to access the control register in question * Thankfully this is a configuration operation so isnt performance * criticial. */ static unsigned long sil680_selreg(struct ata_port *ap, int r) { unsigned long base = 0xA0 + r; base += (ap->port_no << 4); return base; } /** * sil680_seldev - return register base * @hwif: interface * @r: config offset * * Turn a config register offset into the right address in either * PCI space or MMIO space to access the control register in question * including accounting for the unit shift. */ static unsigned long sil680_seldev(struct ata_port *ap, struct ata_device *adev, int r) { unsigned long base = 0xA0 + r; base += (ap->port_no << 4); base |= adev->devno ? 2 : 0; return base; } /** * sil680_cable_detect - cable detection * @ap: ATA port * * Perform cable detection. The SIL680 stores this in PCI config * space for us. */ static int sil680_cable_detect(struct ata_port *ap) { struct pci_dev *pdev = to_pci_dev(ap->host->dev); unsigned long addr = sil680_selreg(ap, 0); u8 ata66; pci_read_config_byte(pdev, addr, &ata66); if (ata66 & 1) return ATA_CBL_PATA80; else return ATA_CBL_PATA40; } static int sil680_pre_reset(struct ata_port *ap) { ap->cbl = sil680_cable_detect(ap); return ata_std_prereset(ap); } /** * sil680_bus_reset - reset the SIL680 bus * @ap: ATA port to reset * * Perform the SIL680 housekeeping when doing an ATA bus reset */ static int sil680_bus_reset(struct ata_port *ap,unsigned int *classes) { struct pci_dev *pdev = to_pci_dev(ap->host->dev); unsigned long addr = sil680_selreg(ap, 0); u8 reset; pci_read_config_byte(pdev, addr, &reset); pci_write_config_byte(pdev, addr, reset | 0x03); udelay(25); pci_write_config_byte(pdev, addr, reset); return ata_std_softreset(ap, classes); } static void sil680_error_handler(struct ata_port *ap) { ata_bmdma_drive_eh(ap, sil680_pre_reset, sil680_bus_reset, NULL, ata_std_postreset); } /** * sil680_set_piomode - set initial PIO mode data * @ap: ATA interface * @adev: ATA device * * Program the SIL680 registers for PIO mode. Note that the task speed * registers are shared between the devices so we must pick the lowest * mode for command work. */ static void sil680_set_piomode(struct ata_port *ap, struct ata_device *adev) { static u16 speed_p[5] = { 0x328A, 0x2283, 0x1104, 0x10C3, 0x10C1 }; static u16 speed_t[5] = { 0x328A, 0x2283, 0x1281, 0x10C3, 0x10C1 }; unsigned long tfaddr = sil680_selreg(ap, 0x02); unsigned long addr = sil680_seldev(ap, adev, 0x04); struct pci_dev *pdev = to_pci_dev(ap->host->dev); int pio = adev->pio_mode - XFER_PIO_0; int lowest_pio = pio; u16 reg; struct ata_device *pair = ata_dev_pair(adev); if (pair != NULL && adev->pio_mode > pair->pio_mode) lowest_pio = pair->pio_mode - XFER_PIO_0; pci_write_config_word(pdev, addr, speed_p[pio]); pci_write_config_word(pdev, tfaddr, speed_t[lowest_pio]); pci_read_config_word(pdev, tfaddr-2, ®); reg &= ~0x0200; /* Clear IORDY */ if (ata_pio_need_iordy(adev)) reg |= 0x0200; /* Enable IORDY */ pci_write_config_word(pdev, tfaddr-2, reg); } /** * sil680_set_dmamode - set initial DMA mode data * @ap: ATA interface * @adev: ATA device * * Program the MWDMA/UDMA modes for the sil680 k * chipset. The MWDMA mode values are pulled from a lookup table * while the chipset uses mode number for UDMA. */ static void sil680_set_dmamode(struct ata_port *ap, struct ata_device *adev) { static u8 ultra_table[2][7] = { { 0x0C, 0x07, 0x05, 0x04, 0x02, 0x01, 0xFF }, /* 100MHz */ { 0x0F, 0x0B, 0x07, 0x05, 0x03, 0x02, 0x01 }, /* 133Mhz */ }; static u16 dma_table[3] = { 0x2208, 0x10C2, 0x10C1 }; struct pci_dev *pdev = to_pci_dev(ap->host->dev); unsigned long ma = sil680_seldev(ap, adev, 0x08); unsigned long ua = sil680_seldev(ap, adev, 0x0C); unsigned long addr_mask = 0x80 + 4 * ap->port_no; int port_shift = adev->devno * 4; u8 scsc, mode; u16 multi, ultra; pci_read_config_byte(pdev, 0x8A, &scsc); pci_read_config_byte(pdev, addr_mask, &mode); pci_read_config_word(pdev, ma, &multi); pci_read_config_word(pdev, ua, &ultra); /* Mask timing bits */ ultra &= ~0x3F; mode &= ~(0x03 << port_shift); /* Extract scsc */ scsc = (scsc & 0x30) ? 1: 0; if (adev->dma_mode >= XFER_UDMA_0) { multi = 0x10C1; ultra |= ultra_table[scsc][adev->dma_mode - XFER_UDMA_0]; mode |= (0x03 << port_shift); } else { multi = dma_table[adev->dma_mode - XFER_MW_DMA_0]; mode |= (0x02 << port_shift); } pci_write_config_byte(pdev, addr_mask, mode); pci_write_config_word(pdev, ma, multi); pci_write_config_word(pdev, ua, ultra); } static struct scsi_host_template sil680_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, }; static struct ata_port_operations sil680_port_ops = { .port_disable = ata_port_disable, .set_piomode = sil680_set_piomode, .set_dmamode = sil680_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 = sil680_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_stop = ata_port_stop, .host_stop = ata_host_stop }; /** * sil680_init_chip - chip setup * @pdev: PCI device * * Perform all the chip setup which must be done both when the device * is powered up on boot and when we resume in case we resumed from RAM. * Returns the final clock settings. */ static u8 sil680_init_chip(struct pci_dev *pdev) { u32 class_rev = 0; u8 tmpbyte = 0; pci_read_config_dword(pdev, PCI_CLASS_REVISION, &class_rev); class_rev &= 0xff; /* FIXME: double check */ pci_write_config_byte(pdev, PCI_CACHE_LINE_SIZE, (class_rev) ? 1 : 255); pci_write_config_byte(pdev, 0x80, 0x00); pci_write_config_byte(pdev, 0x84, 0x00); pci_read_config_byte(pdev, 0x8A, &tmpbyte); printk(KERN_INFO "sil680: BA5_EN = %d clock = %02X\n", tmpbyte & 1, tmpbyte & 0x30); switch(tmpbyte & 0x30) { case 0x00: /* 133 clock attempt to force it on */ pci_write_config_byte(pdev, 0x8A, tmpbyte|0x10); break; case 0x30: /* if clocking is disabled */ /* 133 clock attempt to force it on */ pci_write_config_byte(pdev, 0x8A, tmpbyte & ~0x20); break; case 0x10: /* 133 already */ break; case 0x20: /* BIOS set PCI x2 clocking */ break; } pci_read_config_byte(pdev, 0x8A, &tmpbyte); printk(KERN_INFO "sil680: BA5_EN = %d clock = %02X\n", tmpbyte & 1, tmpbyte & 0x30); pci_write_config_byte(pdev, 0xA1, 0x72); pci_write_config_word(pdev, 0xA2, 0x328A); pci_write_config_dword(pdev, 0xA4, 0x62DD62DD); pci_write_config_dword(pdev, 0xA8, 0x43924392); pci_write_config_dword(pdev, 0xAC, 0x40094009); pci_write_config_byte(pdev, 0xB1, 0x72); pci_write_config_word(pdev, 0xB2, 0x328A); pci_write_config_dword(pdev, 0xB4, 0x62DD62DD); pci_write_config_dword(pdev, 0xB8, 0x43924392); pci_write_config_dword(pdev, 0xBC, 0x40094009); switch(tmpbyte & 0x30) { case 0x00: printk(KERN_INFO "sil680: 100MHz clock.\n");break; case 0x10: printk(KERN_INFO "sil680: 133MHz clock.\n");break; case 0x20: printk(KERN_INFO "sil680: Using PCI clock.\n");break; /* This last case is _NOT_ ok */ case 0x30: printk(KERN_ERR "sil680: Clock disabled ?\n"); } return tmpbyte & 0x30; } static int sil680_init_one(struct pci_dev *pdev, const struct pci_device_id *id) { static struct ata_port_info info = { .sht = &sil680_sht, .flags = ATA_FLAG_SLAVE_POSS | ATA_FLAG_SRST, .pio_mask = 0x1f, .mwdma_mask = 0x07, .udma_mask = 0x7f, .port_ops = &sil680_port_ops }; static struct ata_port_info info_slow = { .sht = &sil680_sht, .flags = ATA_FLAG_SLAVE_POSS | ATA_FLAG_SRST, .pio_mask = 0x1f, .mwdma_mask = 0x07, .udma_mask = 0x3f, .port_ops = &sil680_port_ops }; static struct ata_port_info *port_info[2] = {&info, &info}; static int printed_version; if (!printed_version++) dev_printk(KERN_DEBUG, &pdev->dev, "version " DRV_VERSION "\n"); switch(sil680_init_chip(pdev)) { case 0: port_info[0] = port_info[1] = &info_slow; break; case 0x30: return -ENODEV; } return ata_pci_init_one(pdev, port_info, 2); } static int sil680_reinit_one(struct pci_dev *pdev) { sil680_init_chip(pdev); return ata_pci_device_resume(pdev); } static const struct pci_device_id sil680[] = { { PCI_VDEVICE(CMD, PCI_DEVICE_ID_SII_680), }, { }, }; static struct pci_driver sil680_pci_driver = { .name = DRV_NAME, .id_table = sil680, .probe = sil680_init_one, .remove = ata_pci_remove_one, .suspend = ata_pci_device_suspend, .resume = sil680_reinit_one, }; static int __init sil680_init(void) { return pci_register_driver(&sil680_pci_driver); } static void __exit sil680_exit(void) { pci_unregister_driver(&sil680_pci_driver); } MODULE_AUTHOR("Alan Cox"); MODULE_DESCRIPTION("low-level driver for SI680 PATA"); MODULE_LICENSE("GPL"); MODULE_DEVICE_TABLE(pci, sil680); MODULE_VERSION(DRV_VERSION); module_init(sil680_init); module_exit(sil680_exit);