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>
41 #include <linux/device.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 SIS180_SATA1_OFS = 0x10, /* offset from sata0->sata1 phy regs */
56 SIS182_SATA1_OFS = 0x20, /* offset from sata0->sata1 phy regs */
57 SIS_PMR = 0x90, /* port mapping register */
58 SIS_PMR_COMBINED = 0x30,
61 SIS_FLAG_CFGSCR = (1 << 30), /* host flag: SCRs via PCI cfg */
63 GENCTL_IOMAPPED_SCR = (1 << 26), /* if set, SCRs are in IO space */
66 static int sis_init_one (struct pci_dev *pdev, const struct pci_device_id *ent);
67 static u32 sis_scr_read (struct ata_port *ap, unsigned int sc_reg);
68 static void sis_scr_write (struct ata_port *ap, unsigned int sc_reg, u32 val);
70 static const struct pci_device_id sis_pci_tbl[] = {
71 { PCI_VENDOR_ID_SI, 0x180, PCI_ANY_ID, PCI_ANY_ID, 0, 0, sis_180 },
72 { PCI_VENDOR_ID_SI, 0x181, PCI_ANY_ID, PCI_ANY_ID, 0, 0, sis_180 },
73 { PCI_VENDOR_ID_SI, 0x182, PCI_ANY_ID, PCI_ANY_ID, 0, 0, sis_180 },
74 { } /* terminate list */
78 static struct pci_driver sis_pci_driver = {
80 .id_table = sis_pci_tbl,
81 .probe = sis_init_one,
82 .remove = ata_pci_remove_one,
85 static struct scsi_host_template sis_sht = {
86 .module = THIS_MODULE,
88 .ioctl = ata_scsi_ioctl,
89 .queuecommand = ata_scsi_queuecmd,
90 .eh_strategy_handler = ata_scsi_error,
91 .can_queue = ATA_DEF_QUEUE,
92 .this_id = ATA_SHT_THIS_ID,
93 .sg_tablesize = ATA_MAX_PRD,
94 .cmd_per_lun = ATA_SHT_CMD_PER_LUN,
95 .emulated = ATA_SHT_EMULATED,
96 .use_clustering = ATA_SHT_USE_CLUSTERING,
97 .proc_name = DRV_NAME,
98 .dma_boundary = ATA_DMA_BOUNDARY,
99 .slave_configure = ata_scsi_slave_config,
100 .bios_param = ata_std_bios_param,
103 static const struct ata_port_operations sis_ops = {
104 .port_disable = ata_port_disable,
105 .tf_load = ata_tf_load,
106 .tf_read = ata_tf_read,
107 .check_status = ata_check_status,
108 .exec_command = ata_exec_command,
109 .dev_select = ata_std_dev_select,
110 .phy_reset = sata_phy_reset,
111 .bmdma_setup = ata_bmdma_setup,
112 .bmdma_start = ata_bmdma_start,
113 .bmdma_stop = ata_bmdma_stop,
114 .bmdma_status = ata_bmdma_status,
115 .qc_prep = ata_qc_prep,
116 .qc_issue = ata_qc_issue_prot,
117 .eng_timeout = ata_eng_timeout,
118 .irq_handler = ata_interrupt,
119 .irq_clear = ata_bmdma_irq_clear,
120 .scr_read = sis_scr_read,
121 .scr_write = sis_scr_write,
122 .port_start = ata_port_start,
123 .port_stop = ata_port_stop,
124 .host_stop = ata_host_stop,
127 static struct ata_port_info sis_port_info = {
129 .host_flags = ATA_FLAG_SATA | ATA_FLAG_SATA_RESET |
134 .port_ops = &sis_ops,
138 MODULE_AUTHOR("Uwe Koziolek");
139 MODULE_DESCRIPTION("low-level driver for Silicon Integratad Systems SATA controller");
140 MODULE_LICENSE("GPL");
141 MODULE_DEVICE_TABLE(pci, sis_pci_tbl);
142 MODULE_VERSION(DRV_VERSION);
144 static unsigned int get_scr_cfg_addr(unsigned int port_no, unsigned int sc_reg, int device)
146 unsigned int addr = SIS_SCR_BASE + (4 * sc_reg);
150 addr += SIS182_SATA1_OFS;
152 addr += SIS180_SATA1_OFS;
158 static u32 sis_scr_cfg_read (struct ata_port *ap, unsigned int sc_reg)
160 struct pci_dev *pdev = to_pci_dev(ap->host_set->dev);
161 unsigned int cfg_addr = get_scr_cfg_addr(ap->port_no, sc_reg, pdev->device);
165 if (sc_reg == SCR_ERROR) /* doesn't exist in PCI cfg space */
168 pci_read_config_byte(pdev, SIS_PMR, &pmr);
170 pci_read_config_dword(pdev, cfg_addr, &val);
172 if ((pdev->device == 0x182) || (pmr & SIS_PMR_COMBINED))
173 pci_read_config_dword(pdev, cfg_addr+0x10, &val2);
178 static void sis_scr_cfg_write (struct ata_port *ap, unsigned int scr, u32 val)
180 struct pci_dev *pdev = to_pci_dev(ap->host_set->dev);
181 unsigned int cfg_addr = get_scr_cfg_addr(ap->port_no, scr, pdev->device);
184 if (scr == SCR_ERROR) /* doesn't exist in PCI cfg space */
187 pci_read_config_byte(pdev, SIS_PMR, &pmr);
189 pci_write_config_dword(pdev, cfg_addr, val);
191 if ((pdev->device == 0x182) || (pmr & SIS_PMR_COMBINED))
192 pci_write_config_dword(pdev, cfg_addr+0x10, val);
195 static u32 sis_scr_read (struct ata_port *ap, unsigned int sc_reg)
197 struct pci_dev *pdev = to_pci_dev(ap->host_set->dev);
201 if (sc_reg > SCR_CONTROL)
204 if (ap->flags & SIS_FLAG_CFGSCR)
205 return sis_scr_cfg_read(ap, sc_reg);
207 pci_read_config_byte(pdev, SIS_PMR, &pmr);
209 val = inl(ap->ioaddr.scr_addr + (sc_reg * 4));
211 if ((pdev->device == 0x182) || (pmr & SIS_PMR_COMBINED))
212 val2 = inl(ap->ioaddr.scr_addr + (sc_reg * 4) + 0x10);
217 static void sis_scr_write (struct ata_port *ap, unsigned int sc_reg, u32 val)
219 struct pci_dev *pdev = to_pci_dev(ap->host_set->dev);
222 if (sc_reg > SCR_CONTROL)
225 pci_read_config_byte(pdev, SIS_PMR, &pmr);
227 if (ap->flags & SIS_FLAG_CFGSCR)
228 sis_scr_cfg_write(ap, sc_reg, val);
230 outl(val, ap->ioaddr.scr_addr + (sc_reg * 4));
231 if ((pdev->device == 0x182) || (pmr & SIS_PMR_COMBINED))
232 outl(val, ap->ioaddr.scr_addr + (sc_reg * 4)+0x10);
236 static int sis_init_one (struct pci_dev *pdev, const struct pci_device_id *ent)
238 static int printed_version;
239 struct ata_probe_ent *probe_ent = NULL;
242 struct ata_port_info *ppi;
243 int pci_dev_busy = 0;
247 if (!printed_version++)
248 dev_printk(KERN_INFO, &pdev->dev, "version " DRV_VERSION "\n");
250 rc = pci_enable_device(pdev);
254 rc = pci_request_regions(pdev, DRV_NAME);
260 rc = pci_set_dma_mask(pdev, ATA_DMA_MASK);
262 goto err_out_regions;
263 rc = pci_set_consistent_dma_mask(pdev, ATA_DMA_MASK);
265 goto err_out_regions;
267 ppi = &sis_port_info;
268 probe_ent = ata_pci_init_native_mode(pdev, &ppi, ATA_PORT_PRIMARY | ATA_PORT_SECONDARY);
271 goto err_out_regions;
274 /* check and see if the SCRs are in IO space or PCI cfg space */
275 pci_read_config_dword(pdev, SIS_GENCTL, &genctl);
276 if ((genctl & GENCTL_IOMAPPED_SCR) == 0)
277 probe_ent->host_flags |= SIS_FLAG_CFGSCR;
279 /* if hardware thinks SCRs are in IO space, but there are
280 * no IO resources assigned, change to PCI cfg space.
282 if ((!(probe_ent->host_flags & SIS_FLAG_CFGSCR)) &&
283 ((pci_resource_start(pdev, SIS_SCR_PCI_BAR) == 0) ||
284 (pci_resource_len(pdev, SIS_SCR_PCI_BAR) < 128))) {
285 genctl &= ~GENCTL_IOMAPPED_SCR;
286 pci_write_config_dword(pdev, SIS_GENCTL, genctl);
287 probe_ent->host_flags |= SIS_FLAG_CFGSCR;
290 pci_read_config_byte(pdev, SIS_PMR, &pmr);
291 if (ent->device != 0x182) {
292 if ((pmr & SIS_PMR_COMBINED) == 0) {
293 dev_printk(KERN_INFO, &pdev->dev,
294 "Detected SiS 180/181 chipset in SATA mode\n");
298 dev_printk(KERN_INFO, &pdev->dev,
299 "Detected SiS 180/181 chipset in combined mode\n");
304 dev_printk(KERN_INFO, &pdev->dev, "Detected SiS 182 chipset\n");
308 if (!(probe_ent->host_flags & SIS_FLAG_CFGSCR)) {
309 probe_ent->port[0].scr_addr =
310 pci_resource_start(pdev, SIS_SCR_PCI_BAR);
311 probe_ent->port[1].scr_addr =
312 pci_resource_start(pdev, SIS_SCR_PCI_BAR) + port2_start;
315 pci_set_master(pdev);
318 /* FIXME: check ata_device_add return value */
319 ata_device_add(probe_ent);
325 pci_release_regions(pdev);
329 pci_disable_device(pdev);
334 static int __init sis_init(void)
336 return pci_module_init(&sis_pci_driver);
339 static void __exit sis_exit(void)
341 pci_unregister_driver(&sis_pci_driver);
344 module_init(sis_init);
345 module_exit(sis_exit);