| /* |
| * 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 */ |
| SIS180_SATA1_OFS = 0x10, /* offset from sata0->sata1 phy regs */ |
| SIS182_SATA1_OFS = 0x20, /* offset from sata0->sata1 phy regs */ |
| SIS_PMR = 0x90, /* port mapping register */ |
| SIS_PMR_COMBINED = 0x30, |
| |
| /* 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 }, |
| { PCI_VENDOR_ID_SI, 0x182, 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, int device) |
| { |
| unsigned int addr = SIS_SCR_BASE + (4 * sc_reg); |
| |
| if (port_no) |
| if (device == 0x182) |
| addr += SIS182_SATA1_OFS; |
| else |
| addr += SIS180_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, pdev->device); |
| u32 val, val2; |
| u8 pmr; |
| |
| if (sc_reg == SCR_ERROR) /* doesn't exist in PCI cfg space */ |
| return 0xffffffff; |
| |
| pci_read_config_byte(pdev, SIS_PMR, &pmr); |
| |
| pci_read_config_dword(pdev, cfg_addr, &val); |
| |
| if ((pdev->device == 0x182) || (pmr & SIS_PMR_COMBINED)) |
| pci_read_config_dword(pdev, cfg_addr+0x10, &val2); |
| |
| return val|val2; |
| } |
| |
| 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, pdev->device); |
| u8 pmr; |
| |
| if (scr == SCR_ERROR) /* doesn't exist in PCI cfg space */ |
| return; |
| |
| pci_read_config_byte(pdev, SIS_PMR, &pmr); |
| |
| pci_write_config_dword(pdev, cfg_addr, val); |
| |
| if ((pdev->device == 0x182) || (pmr & SIS_PMR_COMBINED)) |
| pci_write_config_dword(pdev, cfg_addr+0x10, val); |
| } |
| |
| static u32 sis_scr_read (struct ata_port *ap, unsigned int sc_reg) |
| { |
| struct pci_dev *pdev = to_pci_dev(ap->host_set->dev); |
| u32 val,val2; |
| u8 pmr; |
| |
| if (sc_reg > SCR_CONTROL) |
| return 0xffffffffU; |
| |
| if (ap->flags & SIS_FLAG_CFGSCR) |
| return sis_scr_cfg_read(ap, sc_reg); |
| |
| pci_read_config_byte(pdev, SIS_PMR, &pmr); |
| |
| val = inl(ap->ioaddr.scr_addr + (sc_reg * 4)); |
| |
| if ((pdev->device == 0x182) || (pmr & SIS_PMR_COMBINED)) |
| val2 = inl(ap->ioaddr.scr_addr + (sc_reg * 4)+0x10); |
| |
| return val|val2; |
| } |
| |
| static void sis_scr_write (struct ata_port *ap, unsigned int sc_reg, u32 val) |
| { |
| struct pci_dev *pdev = to_pci_dev(ap->host_set->dev); |
| u8 pmr; |
| |
| if (sc_reg > SCR_CONTROL) |
| return; |
| |
| pci_read_config_byte(pdev, SIS_PMR, &pmr); |
| |
| if (ap->flags & SIS_FLAG_CFGSCR) |
| sis_scr_cfg_write(ap, sc_reg, val); |
| else { |
| outl(val, ap->ioaddr.scr_addr + (sc_reg * 4)); |
| if ((pdev->device == 0x182) || (pmr & SIS_PMR_COMBINED)) |
| outl(val, ap->ioaddr.scr_addr + (sc_reg * 4)+0x10); |
| } |
| } |
| |
| /* 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; |
| u8 pmr; |
| u8 port2_start; |
| |
| 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; |
| } |
| |
| pci_read_config_byte(pdev, SIS_PMR, &pmr); |
| if (ent->device != 0x182) { |
| if ((pmr & SIS_PMR_COMBINED) == 0) { |
| printk(KERN_INFO "sata_sis: Detected SiS 180/181 chipset in SATA mode\n"); |
| port2_start=0x64; |
| } |
| else { |
| printk(KERN_INFO "sata_sis: Detected SiS 180/181 chipset in combined mode\n"); |
| port2_start=0; |
| } |
| } |
| else { |
| printk(KERN_INFO "sata_sis: Detected SiS 182 chipset\n"); |
| port2_start = 0x20; |
| } |
| |
| 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) + port2_start; |
| } |
| |
| 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); |
| |