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V4L/DVB (6715): ivtv: Remove unnecessary register update
[linux-2.6/verdex.git] / drivers / ata / sata_sis.c
bloba01260a564324490787c4a93cba20778cd4dbb8f
1 /*
2 * sata_sis.c - Silicon Integrated Systems SATA
3 *
4 * Maintained by: Uwe Koziolek
5 * Please ALWAYS copy linux-ide@vger.kernel.org
6 * on emails.
7 *
8 * Copyright 2004 Uwe Koziolek
9 *
10 *
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)
14 * any later version.
15 *
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.
20 *
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.
24 *
25 *
26 * libata documentation is available via 'make {ps|pdf}docs',
27 * as Documentation/DocBook/libata.*
28 *
29 * Hardware documentation available under NDA.
30 *
31 */
32
33 #include <linux/kernel.h>
34 #include <linux/module.h>
35 #include <linux/pci.h>
36 #include <linux/init.h>
37 #include <linux/blkdev.h>
38 #include <linux/delay.h>
39 #include <linux/interrupt.h>
40 #include <linux/device.h>
41 #include <scsi/scsi_host.h>
42 #include <linux/libata.h>
43 #include "sis.h"
44
45 #define DRV_NAME "sata_sis"
46 #define DRV_VERSION "1.0"
47
48 enum {
49 sis_180 = 0,
50 SIS_SCR_PCI_BAR = 5,
51
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,
59
60 /* random bits */
61 SIS_FLAG_CFGSCR = (1 << 30), /* host flag: SCRs via PCI cfg */
62
63 GENCTL_IOMAPPED_SCR = (1 << 26), /* if set, SCRs are in IO space */
64 };
65
66 static int sis_init_one(struct pci_dev *pdev, const struct pci_device_id *ent);
67 static int sis_scr_read(struct ata_port *ap, unsigned int sc_reg, u32 *val);
68 static int sis_scr_write(struct ata_port *ap, unsigned int sc_reg, u32 val);
69
70 static const struct pci_device_id sis_pci_tbl[] = {
71 { PCI_VDEVICE(SI, 0x0180), sis_180 }, /* SiS 964/180 */
72 { PCI_VDEVICE(SI, 0x0181), sis_180 }, /* SiS 964/180 */
73 { PCI_VDEVICE(SI, 0x0182), sis_180 }, /* SiS 965/965L */
74 { PCI_VDEVICE(SI, 0x0183), sis_180 }, /* SiS 965/965L */
75 { PCI_VDEVICE(SI, 0x1182), sis_180 }, /* SiS 966/680 */
76 { PCI_VDEVICE(SI, 0x1183), sis_180 }, /* SiS 966/966L/968/680 */
77
78 { } /* terminate list */
79 };
80
81 static struct pci_driver sis_pci_driver = {
82 .name = DRV_NAME,
83 .id_table = sis_pci_tbl,
84 .probe = sis_init_one,
85 .remove = ata_pci_remove_one,
86 };
87
88 static struct scsi_host_template sis_sht = {
89 .module = THIS_MODULE,
90 .name = DRV_NAME,
91 .ioctl = ata_scsi_ioctl,
92 .queuecommand = ata_scsi_queuecmd,
93 .can_queue = ATA_DEF_QUEUE,
94 .this_id = ATA_SHT_THIS_ID,
95 .sg_tablesize = LIBATA_MAX_PRD,
96 .cmd_per_lun = ATA_SHT_CMD_PER_LUN,
97 .emulated = ATA_SHT_EMULATED,
98 .use_clustering = ATA_SHT_USE_CLUSTERING,
99 .proc_name = DRV_NAME,
100 .dma_boundary = ATA_DMA_BOUNDARY,
101 .slave_configure = ata_scsi_slave_config,
102 .slave_destroy = ata_scsi_slave_destroy,
103 .bios_param = ata_std_bios_param,
104 };
105
106 static const struct ata_port_operations sis_ops = {
107 .tf_load = ata_tf_load,
108 .tf_read = ata_tf_read,
109 .check_status = ata_check_status,
110 .exec_command = ata_exec_command,
111 .dev_select = ata_std_dev_select,
112 .bmdma_setup = ata_bmdma_setup,
113 .bmdma_start = ata_bmdma_start,
114 .bmdma_stop = ata_bmdma_stop,
115 .bmdma_status = ata_bmdma_status,
116 .qc_prep = ata_qc_prep,
117 .qc_issue = ata_qc_issue_prot,
118 .data_xfer = ata_data_xfer,
119 .freeze = ata_bmdma_freeze,
120 .thaw = ata_bmdma_thaw,
121 .error_handler = ata_bmdma_error_handler,
122 .post_internal_cmd = ata_bmdma_post_internal_cmd,
123 .irq_clear = ata_bmdma_irq_clear,
124 .irq_on = ata_irq_on,
125 .scr_read = sis_scr_read,
126 .scr_write = sis_scr_write,
127 .port_start = ata_port_start,
128 };
129
130 static const struct ata_port_info sis_port_info = {
131 .flags = ATA_FLAG_SATA | ATA_FLAG_NO_LEGACY,
132 .pio_mask = 0x1f,
133 .mwdma_mask = 0x7,
134 .udma_mask = ATA_UDMA6,
135 .port_ops = &sis_ops,
136 };
137
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);
143
144 static unsigned int get_scr_cfg_addr(struct ata_port *ap, unsigned int sc_reg)
145 {
146 struct pci_dev *pdev = to_pci_dev(ap->host->dev);
147 unsigned int addr = SIS_SCR_BASE + (4 * sc_reg);
148 u8 pmr;
149
150 if (ap->port_no) {
151 switch (pdev->device) {
152 case 0x0180:
153 case 0x0181:
154 pci_read_config_byte(pdev, SIS_PMR, &pmr);
155 if ((pmr & SIS_PMR_COMBINED) == 0)
156 addr += SIS180_SATA1_OFS;
157 break;
158
159 case 0x0182:
160 case 0x0183:
161 case 0x1182:
162 addr += SIS182_SATA1_OFS;
163 break;
164 }
165 }
166 return addr;
167 }
168
169 static u32 sis_scr_cfg_read(struct ata_port *ap, unsigned int sc_reg, u32 *val)
170 {
171 struct pci_dev *pdev = to_pci_dev(ap->host->dev);
172 unsigned int cfg_addr = get_scr_cfg_addr(ap, sc_reg);
173 u32 val2 = 0;
174 u8 pmr;
175
176 if (sc_reg == SCR_ERROR) /* doesn't exist in PCI cfg space */
177 return 0xffffffff;
178
179 pci_read_config_byte(pdev, SIS_PMR, &pmr);
180
181 pci_read_config_dword(pdev, cfg_addr, val);
182
183 if ((pdev->device == 0x0182) || (pdev->device == 0x0183) ||
184 (pdev->device == 0x1182) || (pmr & SIS_PMR_COMBINED))
185 pci_read_config_dword(pdev, cfg_addr+0x10, &val2);
186
187 *val |= val2;
188 *val &= 0xfffffffb; /* avoid problems with powerdowned ports */
189
190 return 0;
191 }
192
193 static void sis_scr_cfg_write(struct ata_port *ap, unsigned int sc_reg, u32 val)
194 {
195 struct pci_dev *pdev = to_pci_dev(ap->host->dev);
196 unsigned int cfg_addr = get_scr_cfg_addr(ap, sc_reg);
197 u8 pmr;
198
199 if (sc_reg == SCR_ERROR) /* doesn't exist in PCI cfg space */
200 return;
201
202 pci_read_config_byte(pdev, SIS_PMR, &pmr);
203
204 pci_write_config_dword(pdev, cfg_addr, val);
205
206 if ((pdev->device == 0x0182) || (pdev->device == 0x0183) ||
207 (pdev->device == 0x1182) || (pmr & SIS_PMR_COMBINED))
208 pci_write_config_dword(pdev, cfg_addr+0x10, val);
209 }
210
211 static int sis_scr_read(struct ata_port *ap, unsigned int sc_reg, u32 *val)
212 {
213 struct pci_dev *pdev = to_pci_dev(ap->host->dev);
214 u8 pmr;
215
216 if (sc_reg > SCR_CONTROL)
217 return -EINVAL;
218
219 if (ap->flags & SIS_FLAG_CFGSCR)
220 return sis_scr_cfg_read(ap, sc_reg, val);
221
222 pci_read_config_byte(pdev, SIS_PMR, &pmr);
223
224 *val = ioread32(ap->ioaddr.scr_addr + (sc_reg * 4));
225
226 if ((pdev->device == 0x0182) || (pdev->device == 0x0183) ||
227 (pdev->device == 0x1182) || (pmr & SIS_PMR_COMBINED))
228 *val |= ioread32(ap->ioaddr.scr_addr + (sc_reg * 4) + 0x10);
229
230 *val &= 0xfffffffb;
231
232 return 0;
233 }
234
235 static int sis_scr_write(struct ata_port *ap, unsigned int sc_reg, u32 val)
236 {
237 struct pci_dev *pdev = to_pci_dev(ap->host->dev);
238 u8 pmr;
239
240 if (sc_reg > SCR_CONTROL)
241 return -EINVAL;
242
243 pci_read_config_byte(pdev, SIS_PMR, &pmr);
244
245 if (ap->flags & SIS_FLAG_CFGSCR)
246 sis_scr_cfg_write(ap, sc_reg, val);
247 else {
248 iowrite32(val, ap->ioaddr.scr_addr + (sc_reg * 4));
249 if ((pdev->device == 0x0182) || (pdev->device == 0x0183) ||
250 (pdev->device == 0x1182) || (pmr & SIS_PMR_COMBINED))
251 iowrite32(val, ap->ioaddr.scr_addr + (sc_reg * 4)+0x10);
252 }
253 return 0;
254 }
255
256 static int sis_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
257 {
258 static int printed_version;
259 struct ata_port_info pi = sis_port_info;
260 const struct ata_port_info *ppi[] = { &pi, &pi };
261 struct ata_host *host;
262 u32 genctl, val;
263 u8 pmr;
264 u8 port2_start = 0x20;
265 int rc;
266
267 if (!printed_version++)
268 dev_printk(KERN_INFO, &pdev->dev, "version " DRV_VERSION "\n");
269
270 rc = pcim_enable_device(pdev);
271 if (rc)
272 return rc;
273
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 pi.flags |= SIS_FLAG_CFGSCR;
278
279 /* if hardware thinks SCRs are in IO space, but there are
280 * no IO resources assigned, change to PCI cfg space.
281 */
282 if ((!(pi.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 pi.flags |= SIS_FLAG_CFGSCR;
288 }
289
290 pci_read_config_byte(pdev, SIS_PMR, &pmr);
291 switch (ent->device) {
292 case 0x0180:
293 case 0x0181:
294
295 /* The PATA-handling is provided by pata_sis */
296 switch (pmr & 0x30) {
297 case 0x10:
298 ppi[1] = &sis_info133_for_sata;
299 break;
300
301 case 0x30:
302 ppi[0] = &sis_info133_for_sata;
303 break;
304 }
305 if ((pmr & SIS_PMR_COMBINED) == 0) {
306 dev_printk(KERN_INFO, &pdev->dev,
307 "Detected SiS 180/181/964 chipset in SATA mode\n");
308 port2_start = 64;
309 } else {
310 dev_printk(KERN_INFO, &pdev->dev,
311 "Detected SiS 180/181 chipset in combined mode\n");
312 port2_start = 0;
313 pi.flags |= ATA_FLAG_SLAVE_POSS;
314 }
315 break;
316
317 case 0x0182:
318 case 0x0183:
319 pci_read_config_dword(pdev, 0x6C, &val);
320 if (val & (1L << 31)) {
321 dev_printk(KERN_INFO, &pdev->dev,
322 "Detected SiS 182/965 chipset\n");
323 pi.flags |= ATA_FLAG_SLAVE_POSS;
324 } else {
325 dev_printk(KERN_INFO, &pdev->dev,
326 "Detected SiS 182/965L chipset\n");
327 }
328 break;
329
330 case 0x1182:
331 dev_printk(KERN_INFO, &pdev->dev,
332 "Detected SiS 1182/966/680 SATA controller\n");
333 pi.flags |= ATA_FLAG_SLAVE_POSS;
334 break;
335
336 case 0x1183:
337 dev_printk(KERN_INFO, &pdev->dev,
338 "Detected SiS 1183/966/966L/968/680 controller in PATA mode\n");
339 ppi[0] = &sis_info133_for_sata;
340 ppi[1] = &sis_info133_for_sata;
341 break;
342 }
343
344 rc = ata_pci_prepare_sff_host(pdev, ppi, &host);
345 if (rc)
346 return rc;
347
348 if (!(pi.flags & SIS_FLAG_CFGSCR)) {
349 void __iomem *mmio;
350
351 rc = pcim_iomap_regions(pdev, 1 << SIS_SCR_PCI_BAR, DRV_NAME);
352 if (rc)
353 return rc;
354 mmio = host->iomap[SIS_SCR_PCI_BAR];
355
356 host->ports[0]->ioaddr.scr_addr = mmio;
357 host->ports[1]->ioaddr.scr_addr = mmio + port2_start;
358 }
359
360 pci_set_master(pdev);
361 pci_intx(pdev, 1);
362 return ata_host_activate(host, pdev->irq, ata_interrupt, IRQF_SHARED,
363 &sis_sht);
364 }
365
366 static int __init sis_init(void)
367 {
368 return pci_register_driver(&sis_pci_driver);
369 }
370
371 static void __exit sis_exit(void)
372 {
373 pci_unregister_driver(&sis_pci_driver);
374 }
375
376 module_init(sis_init);
377 module_exit(sis_exit);
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