/* * sata_sis.c - Silicon Integrated Systems SATA * * Maintained by: Uwe Koziolek * Please ALWAYS copy linux-ide@vger.kernel.org * on emails. * * Copyright 2004 Uwe Koziolek * * * 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, 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; see the file COPYING. If not, write to * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. * * * libata documentation is available via 'make {ps|pdf}docs', * as Documentation/DocBook/libata.* * * Hardware documentation available under NDA. * */ #include <linux/config.h> #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/interrupt.h> #include "scsi.h" #include <scsi/scsi_host.h> #include <linux/libata.h> #define DRV_NAME "sata_sis" #define DRV_VERSION "0.5" enum { sis_180 = 0, SIS_SCR_PCI_BAR = 5, /* PCI configuration registers */ SIS_GENCTL = 0x54, /* IDE General Control register */ SIS_SCR_BASE = 0xc0, /* sata0 phy SCR registers */ SIS_SATA1_OFS = 0x10, /* offset from sata0->sata1 phy regs */ /* random bits */ SIS_FLAG_CFGSCR = (1 << 30), /* host flag: SCRs via PCI cfg */ GENCTL_IOMAPPED_SCR = (1 << 26), /* if set, SCRs are in IO space */ }; static int sis_init_one (struct pci_dev *pdev, const struct pci_device_id *ent); static u32 sis_scr_read (struct ata_port *ap, unsigned int sc_reg); static void sis_scr_write (struct ata_port *ap, unsigned int sc_reg, u32 val); static struct pci_device_id sis_pci_tbl[] = { { PCI_VENDOR_ID_SI, 0x180, PCI_ANY_ID, PCI_ANY_ID, 0, 0, sis_180 }, { PCI_VENDOR_ID_SI, 0x181, PCI_ANY_ID, PCI_ANY_ID, 0, 0, sis_180 }, { } /* terminate list */ }; static struct pci_driver sis_pci_driver = { .name = DRV_NAME, .id_table = sis_pci_tbl, .probe = sis_init_one, .remove = ata_pci_remove_one, }; static Scsi_Host_Template sis_sht = { .module = THIS_MODULE, .name = DRV_NAME, .ioctl = ata_scsi_ioctl, .queuecommand = ata_scsi_queuecmd, .eh_strategy_handler = ata_scsi_error, .can_queue = ATA_DEF_QUEUE, .this_id = ATA_SHT_THIS_ID, .sg_tablesize = ATA_MAX_PRD, .max_sectors = ATA_MAX_SECTORS, .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, .bios_param = ata_std_bios_param, .ordered_flush = 1, }; static struct ata_port_operations sis_ops = { .port_disable = ata_port_disable, .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, .phy_reset = sata_phy_reset, .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, .eng_timeout = ata_eng_timeout, .irq_handler = ata_interrupt, .irq_clear = ata_bmdma_irq_clear, .scr_read = sis_scr_read, .scr_write = sis_scr_write, .port_start = ata_port_start, .port_stop = ata_port_stop, .host_stop = ata_host_stop, }; static struct ata_port_info sis_port_info = { .sht = &sis_sht, .host_flags = ATA_FLAG_SATA | ATA_FLAG_SATA_RESET | ATA_FLAG_NO_LEGACY, .pio_mask = 0x1f, .mwdma_mask = 0x7, .udma_mask = 0x7f, .port_ops = &sis_ops, }; MODULE_AUTHOR("Uwe Koziolek"); MODULE_DESCRIPTION("low-level driver for Silicon Integratad Systems SATA controller"); MODULE_LICENSE("GPL"); MODULE_DEVICE_TABLE(pci, sis_pci_tbl); MODULE_VERSION(DRV_VERSION); static unsigned int get_scr_cfg_addr(unsigned int port_no, unsigned int sc_reg) { unsigned int addr = SIS_SCR_BASE + (4 * sc_reg); if (port_no) addr += SIS_SATA1_OFS; return addr; } static u32 sis_scr_cfg_read (struct ata_port *ap, unsigned int sc_reg) { struct pci_dev *pdev = to_pci_dev(ap->host_set->dev); unsigned int cfg_addr = get_scr_cfg_addr(ap->port_no, sc_reg); u32 val; if (sc_reg == SCR_ERROR) /* doesn't exist in PCI cfg space */ return 0xffffffff; pci_read_config_dword(pdev, cfg_addr, &val); return val; } static void sis_scr_cfg_write (struct ata_port *ap, unsigned int scr, u32 val) { struct pci_dev *pdev = to_pci_dev(ap->host_set->dev); unsigned int cfg_addr = get_scr_cfg_addr(ap->port_no, scr); if (scr == SCR_ERROR) /* doesn't exist in PCI cfg space */ return; pci_write_config_dword(pdev, cfg_addr, val); } static u32 sis_scr_read (struct ata_port *ap, unsigned int sc_reg) { if (sc_reg > SCR_CONTROL) return 0xffffffffU; if (ap->flags & SIS_FLAG_CFGSCR) return sis_scr_cfg_read(ap, sc_reg); return inl(ap->ioaddr.scr_addr + (sc_reg * 4)); } static void sis_scr_write (struct ata_port *ap, unsigned int sc_reg, u32 val) { if (sc_reg > SCR_CONTROL) return; if (ap->flags & SIS_FLAG_CFGSCR) sis_scr_cfg_write(ap, sc_reg, val); else outl(val, ap->ioaddr.scr_addr + (sc_reg * 4)); } /* move to PCI layer, integrate w/ MSI stuff */ static void pci_enable_intx(struct pci_dev *pdev) { u16 pci_command; pci_read_config_word(pdev, PCI_COMMAND, &pci_command); if (pci_command & PCI_COMMAND_INTX_DISABLE) { pci_command &= ~PCI_COMMAND_INTX_DISABLE; pci_write_config_word(pdev, PCI_COMMAND, pci_command); } } static int sis_init_one (struct pci_dev *pdev, const struct pci_device_id *ent) { struct ata_probe_ent *probe_ent = NULL; int rc; u32 genctl; struct ata_port_info *ppi; int pci_dev_busy = 0; rc = pci_enable_device(pdev); if (rc) return rc; rc = pci_request_regions(pdev, DRV_NAME); if (rc) { pci_dev_busy = 1; goto err_out; } rc = pci_set_dma_mask(pdev, ATA_DMA_MASK); if (rc) goto err_out_regions; rc = pci_set_consistent_dma_mask(pdev, ATA_DMA_MASK); if (rc) goto err_out_regions; ppi = &sis_port_info; probe_ent = ata_pci_init_native_mode(pdev, &ppi); if (!probe_ent) { rc = -ENOMEM; goto err_out_regions; } /* check and see if the SCRs are in IO space or PCI cfg space */ pci_read_config_dword(pdev, SIS_GENCTL, &genctl); if ((genctl & GENCTL_IOMAPPED_SCR) == 0) probe_ent->host_flags |= SIS_FLAG_CFGSCR; /* if hardware thinks SCRs are in IO space, but there are * no IO resources assigned, change to PCI cfg space. */ if ((!(probe_ent->host_flags & SIS_FLAG_CFGSCR)) && ((pci_resource_start(pdev, SIS_SCR_PCI_BAR) == 0) || (pci_resource_len(pdev, SIS_SCR_PCI_BAR) < 128))) { genctl &= ~GENCTL_IOMAPPED_SCR; pci_write_config_dword(pdev, SIS_GENCTL, genctl); probe_ent->host_flags |= SIS_FLAG_CFGSCR; } if (!(probe_ent->host_flags & SIS_FLAG_CFGSCR)) { probe_ent->port[0].scr_addr = pci_resource_start(pdev, SIS_SCR_PCI_BAR); probe_ent->port[1].scr_addr = pci_resource_start(pdev, SIS_SCR_PCI_BAR) + 64; } pci_set_master(pdev); pci_enable_intx(pdev); /* FIXME: check ata_device_add return value */ ata_device_add(probe_ent); kfree(probe_ent); return 0; err_out_regions: pci_release_regions(pdev); err_out: if (!pci_dev_busy) pci_disable_device(pdev); return rc; } static int __init sis_init(void) { return pci_module_init(&sis_pci_driver); } static void __exit sis_exit(void) { pci_unregister_driver(&sis_pci_driver); } module_init(sis_init); module_exit(sis_exit);