2 * sata_sis.c - Silicon Integrated Systems SATA
4 * Maintained by: Uwe Koziolek
5 * Please ALWAYS copy linux-ide@vger.kernel.org
8 * Copyright 2004 Uwe Koziolek
11 * This program is free software; you can redistribute it and/or modify
12 * it under the terms of the GNU General Public License as published by
13 * the Free Software Foundation; either version 2, or (at your option)
16 * This program is distributed in the hope that it will be useful,
17 * but WITHOUT ANY WARRANTY; without even the implied warranty of
18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19 * GNU General Public License for more details.
21 * You should have received a copy of the GNU General Public License
22 * along with this program; see the file COPYING. If not, write to
23 * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
26 * libata documentation is available via 'make {ps|pdf}docs',
27 * as Documentation/DocBook/libata.*
29 * Hardware documentation available under NDA.
33 #include <linux/config.h>
34 #include <linux/kernel.h>
35 #include <linux/module.h>
36 #include <linux/pci.h>
37 #include <linux/init.h>
38 #include <linux/blkdev.h>
39 #include <linux/delay.h>
40 #include <linux/interrupt.h>
42 #include <scsi/scsi_host.h>
43 #include <linux/libata.h>
45 #define DRV_NAME "sata_sis"
46 #define DRV_VERSION "0.5"
52 /* PCI configuration registers */
53 SIS_GENCTL = 0x54, /* IDE General Control register */
54 SIS_SCR_BASE = 0xc0, /* sata0 phy SCR registers */
55 SIS_SATA1_OFS = 0x10, /* offset from sata0->sata1 phy regs */
58 SIS_FLAG_CFGSCR = (1 << 30), /* host flag: SCRs via PCI cfg */
60 GENCTL_IOMAPPED_SCR = (1 << 26), /* if set, SCRs are in IO space */
63 static int sis_init_one (struct pci_dev *pdev, const struct pci_device_id *ent);
64 static u32 sis_scr_read (struct ata_port *ap, unsigned int sc_reg);
65 static void sis_scr_write (struct ata_port *ap, unsigned int sc_reg, u32 val);
67 static struct pci_device_id sis_pci_tbl[] = {
68 { PCI_VENDOR_ID_SI, 0x180, PCI_ANY_ID, PCI_ANY_ID, 0, 0, sis_180 },
69 { PCI_VENDOR_ID_SI, 0x181, PCI_ANY_ID, PCI_ANY_ID, 0, 0, sis_180 },
70 { } /* terminate list */
74 static struct pci_driver sis_pci_driver = {
76 .id_table = sis_pci_tbl,
77 .probe = sis_init_one,
78 .remove = ata_pci_remove_one,
81 static Scsi_Host_Template sis_sht = {
82 .module = THIS_MODULE,
84 .ioctl = ata_scsi_ioctl,
85 .queuecommand = ata_scsi_queuecmd,
86 .eh_strategy_handler = ata_scsi_error,
87 .can_queue = ATA_DEF_QUEUE,
88 .this_id = ATA_SHT_THIS_ID,
89 .sg_tablesize = ATA_MAX_PRD,
90 .max_sectors = ATA_MAX_SECTORS,
91 .cmd_per_lun = ATA_SHT_CMD_PER_LUN,
92 .emulated = ATA_SHT_EMULATED,
93 .use_clustering = ATA_SHT_USE_CLUSTERING,
94 .proc_name = DRV_NAME,
95 .dma_boundary = ATA_DMA_BOUNDARY,
96 .slave_configure = ata_scsi_slave_config,
97 .bios_param = ata_std_bios_param,
101 static struct ata_port_operations sis_ops = {
102 .port_disable = ata_port_disable,
103 .tf_load = ata_tf_load,
104 .tf_read = ata_tf_read,
105 .check_status = ata_check_status,
106 .exec_command = ata_exec_command,
107 .dev_select = ata_std_dev_select,
108 .phy_reset = sata_phy_reset,
109 .bmdma_setup = ata_bmdma_setup,
110 .bmdma_start = ata_bmdma_start,
111 .bmdma_stop = ata_bmdma_stop,
112 .bmdma_status = ata_bmdma_status,
113 .qc_prep = ata_qc_prep,
114 .qc_issue = ata_qc_issue_prot,
115 .eng_timeout = ata_eng_timeout,
116 .irq_handler = ata_interrupt,
117 .irq_clear = ata_bmdma_irq_clear,
118 .scr_read = sis_scr_read,
119 .scr_write = sis_scr_write,
120 .port_start = ata_port_start,
121 .port_stop = ata_port_stop,
122 .host_stop = ata_host_stop,
125 static struct ata_port_info sis_port_info = {
127 .host_flags = ATA_FLAG_SATA | ATA_FLAG_SATA_RESET |
132 .port_ops = &sis_ops,
136 MODULE_AUTHOR("Uwe Koziolek");
137 MODULE_DESCRIPTION("low-level driver for Silicon Integratad Systems SATA controller");
138 MODULE_LICENSE("GPL");
139 MODULE_DEVICE_TABLE(pci, sis_pci_tbl);
140 MODULE_VERSION(DRV_VERSION);
142 static unsigned int get_scr_cfg_addr(unsigned int port_no, unsigned int sc_reg)
144 unsigned int addr = SIS_SCR_BASE + (4 * sc_reg);
147 addr += SIS_SATA1_OFS;
151 static u32 sis_scr_cfg_read (struct ata_port *ap, unsigned int sc_reg)
153 struct pci_dev *pdev = to_pci_dev(ap->host_set->dev);
154 unsigned int cfg_addr = get_scr_cfg_addr(ap->port_no, sc_reg);
157 if (sc_reg == SCR_ERROR) /* doesn't exist in PCI cfg space */
159 pci_read_config_dword(pdev, cfg_addr, &val);
163 static void sis_scr_cfg_write (struct ata_port *ap, unsigned int scr, u32 val)
165 struct pci_dev *pdev = to_pci_dev(ap->host_set->dev);
166 unsigned int cfg_addr = get_scr_cfg_addr(ap->port_no, scr);
168 if (scr == SCR_ERROR) /* doesn't exist in PCI cfg space */
170 pci_write_config_dword(pdev, cfg_addr, val);
173 static u32 sis_scr_read (struct ata_port *ap, unsigned int sc_reg)
175 if (sc_reg > SCR_CONTROL)
178 if (ap->flags & SIS_FLAG_CFGSCR)
179 return sis_scr_cfg_read(ap, sc_reg);
180 return inl(ap->ioaddr.scr_addr + (sc_reg * 4));
183 static void sis_scr_write (struct ata_port *ap, unsigned int sc_reg, u32 val)
185 if (sc_reg > SCR_CONTROL)
188 if (ap->flags & SIS_FLAG_CFGSCR)
189 sis_scr_cfg_write(ap, sc_reg, val);
191 outl(val, ap->ioaddr.scr_addr + (sc_reg * 4));
194 /* move to PCI layer, integrate w/ MSI stuff */
195 static void pci_enable_intx(struct pci_dev *pdev)
199 pci_read_config_word(pdev, PCI_COMMAND, &pci_command);
200 if (pci_command & PCI_COMMAND_INTX_DISABLE) {
201 pci_command &= ~PCI_COMMAND_INTX_DISABLE;
202 pci_write_config_word(pdev, PCI_COMMAND, pci_command);
206 static int sis_init_one (struct pci_dev *pdev, const struct pci_device_id *ent)
208 struct ata_probe_ent *probe_ent = NULL;
211 struct ata_port_info *ppi;
212 int pci_dev_busy = 0;
214 rc = pci_enable_device(pdev);
218 rc = pci_request_regions(pdev, DRV_NAME);
224 rc = pci_set_dma_mask(pdev, ATA_DMA_MASK);
226 goto err_out_regions;
227 rc = pci_set_consistent_dma_mask(pdev, ATA_DMA_MASK);
229 goto err_out_regions;
231 ppi = &sis_port_info;
232 probe_ent = ata_pci_init_native_mode(pdev, &ppi);
235 goto err_out_regions;
238 /* check and see if the SCRs are in IO space or PCI cfg space */
239 pci_read_config_dword(pdev, SIS_GENCTL, &genctl);
240 if ((genctl & GENCTL_IOMAPPED_SCR) == 0)
241 probe_ent->host_flags |= SIS_FLAG_CFGSCR;
243 /* if hardware thinks SCRs are in IO space, but there are
244 * no IO resources assigned, change to PCI cfg space.
246 if ((!(probe_ent->host_flags & SIS_FLAG_CFGSCR)) &&
247 ((pci_resource_start(pdev, SIS_SCR_PCI_BAR) == 0) ||
248 (pci_resource_len(pdev, SIS_SCR_PCI_BAR) < 128))) {
249 genctl &= ~GENCTL_IOMAPPED_SCR;
250 pci_write_config_dword(pdev, SIS_GENCTL, genctl);
251 probe_ent->host_flags |= SIS_FLAG_CFGSCR;
254 if (!(probe_ent->host_flags & SIS_FLAG_CFGSCR)) {
255 probe_ent->port[0].scr_addr =
256 pci_resource_start(pdev, SIS_SCR_PCI_BAR);
257 probe_ent->port[1].scr_addr =
258 pci_resource_start(pdev, SIS_SCR_PCI_BAR) + 64;
261 pci_set_master(pdev);
262 pci_enable_intx(pdev);
264 /* FIXME: check ata_device_add return value */
265 ata_device_add(probe_ent);
271 pci_release_regions(pdev);
275 pci_disable_device(pdev);
280 static int __init sis_init(void)
282 return pci_module_init(&sis_pci_driver);
285 static void __exit sis_exit(void)
287 pci_unregister_driver(&sis_pci_driver);
290 module_init(sis_init);
291 module_exit(sis_exit);