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1da177e4 LT |
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 | * | |
af36d7f0 JG |
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. | |
1da177e4 LT |
30 | * |
31 | */ | |
32 | ||
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 "scsi.h" | |
42 | #include <scsi/scsi_host.h> | |
43 | #include <linux/libata.h> | |
44 | ||
45 | #define DRV_NAME "sata_sis" | |
46 | #define DRV_VERSION "0.5" | |
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 */ | |
f2c853bc AP |
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, | |
1da177e4 LT |
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 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); | |
69 | ||
70 | static 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 }, | |
f2c853bc | 73 | { PCI_VENDOR_ID_SI, 0x182, PCI_ANY_ID, PCI_ANY_ID, 0, 0, sis_180 }, |
1da177e4 LT |
74 | { } /* terminate list */ |
75 | }; | |
76 | ||
77 | ||
78 | static struct pci_driver sis_pci_driver = { | |
79 | .name = DRV_NAME, | |
80 | .id_table = sis_pci_tbl, | |
81 | .probe = sis_init_one, | |
82 | .remove = ata_pci_remove_one, | |
83 | }; | |
84 | ||
85 | static Scsi_Host_Template sis_sht = { | |
86 | .module = THIS_MODULE, | |
87 | .name = DRV_NAME, | |
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 | .max_sectors = ATA_MAX_SECTORS, | |
95 | .cmd_per_lun = ATA_SHT_CMD_PER_LUN, | |
96 | .emulated = ATA_SHT_EMULATED, | |
97 | .use_clustering = ATA_SHT_USE_CLUSTERING, | |
98 | .proc_name = DRV_NAME, | |
99 | .dma_boundary = ATA_DMA_BOUNDARY, | |
100 | .slave_configure = ata_scsi_slave_config, | |
101 | .bios_param = ata_std_bios_param, | |
102 | .ordered_flush = 1, | |
103 | }; | |
104 | ||
105 | static struct ata_port_operations sis_ops = { | |
106 | .port_disable = ata_port_disable, | |
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 | .phy_reset = sata_phy_reset, | |
113 | .bmdma_setup = ata_bmdma_setup, | |
114 | .bmdma_start = ata_bmdma_start, | |
115 | .bmdma_stop = ata_bmdma_stop, | |
116 | .bmdma_status = ata_bmdma_status, | |
117 | .qc_prep = ata_qc_prep, | |
118 | .qc_issue = ata_qc_issue_prot, | |
119 | .eng_timeout = ata_eng_timeout, | |
120 | .irq_handler = ata_interrupt, | |
121 | .irq_clear = ata_bmdma_irq_clear, | |
122 | .scr_read = sis_scr_read, | |
123 | .scr_write = sis_scr_write, | |
124 | .port_start = ata_port_start, | |
125 | .port_stop = ata_port_stop, | |
aa8f0dc6 | 126 | .host_stop = ata_host_stop, |
1da177e4 LT |
127 | }; |
128 | ||
129 | static struct ata_port_info sis_port_info = { | |
130 | .sht = &sis_sht, | |
131 | .host_flags = ATA_FLAG_SATA | ATA_FLAG_SATA_RESET | | |
132 | ATA_FLAG_NO_LEGACY, | |
133 | .pio_mask = 0x1f, | |
134 | .mwdma_mask = 0x7, | |
135 | .udma_mask = 0x7f, | |
136 | .port_ops = &sis_ops, | |
137 | }; | |
138 | ||
139 | ||
140 | MODULE_AUTHOR("Uwe Koziolek"); | |
141 | MODULE_DESCRIPTION("low-level driver for Silicon Integratad Systems SATA controller"); | |
142 | MODULE_LICENSE("GPL"); | |
143 | MODULE_DEVICE_TABLE(pci, sis_pci_tbl); | |
144 | MODULE_VERSION(DRV_VERSION); | |
145 | ||
f2c853bc | 146 | static unsigned int get_scr_cfg_addr(unsigned int port_no, unsigned int sc_reg, int device) |
1da177e4 LT |
147 | { |
148 | unsigned int addr = SIS_SCR_BASE + (4 * sc_reg); | |
149 | ||
f2c853bc AP |
150 | if (port_no) |
151 | if (device == 0x182) | |
152 | addr += SIS182_SATA1_OFS; | |
153 | else | |
154 | addr += SIS180_SATA1_OFS; | |
1da177e4 LT |
155 | return addr; |
156 | } | |
157 | ||
158 | static u32 sis_scr_cfg_read (struct ata_port *ap, unsigned int sc_reg) | |
159 | { | |
160 | struct pci_dev *pdev = to_pci_dev(ap->host_set->dev); | |
f2c853bc AP |
161 | unsigned int cfg_addr = get_scr_cfg_addr(ap->port_no, sc_reg, pdev->device); |
162 | u32 val, val2; | |
163 | u8 pmr; | |
1da177e4 LT |
164 | |
165 | if (sc_reg == SCR_ERROR) /* doesn't exist in PCI cfg space */ | |
166 | return 0xffffffff; | |
f2c853bc AP |
167 | |
168 | pci_read_config_byte(pdev, SIS_PMR, &pmr); | |
169 | ||
1da177e4 | 170 | pci_read_config_dword(pdev, cfg_addr, &val); |
f2c853bc AP |
171 | |
172 | if ((pdev->device == 0x182) || (pmr & SIS_PMR_COMBINED)) | |
173 | pci_read_config_dword(pdev, cfg_addr+0x10, &val2); | |
174 | ||
175 | return val|val2; | |
1da177e4 LT |
176 | } |
177 | ||
178 | static void sis_scr_cfg_write (struct ata_port *ap, unsigned int scr, u32 val) | |
179 | { | |
180 | struct pci_dev *pdev = to_pci_dev(ap->host_set->dev); | |
f2c853bc AP |
181 | unsigned int cfg_addr = get_scr_cfg_addr(ap->port_no, scr, pdev->device); |
182 | u8 pmr; | |
1da177e4 LT |
183 | |
184 | if (scr == SCR_ERROR) /* doesn't exist in PCI cfg space */ | |
185 | return; | |
f2c853bc AP |
186 | |
187 | pci_read_config_byte(pdev, SIS_PMR, &pmr); | |
188 | ||
1da177e4 | 189 | pci_write_config_dword(pdev, cfg_addr, val); |
f2c853bc AP |
190 | |
191 | if ((pdev->device == 0x182) || (pmr & SIS_PMR_COMBINED)) | |
192 | pci_write_config_dword(pdev, cfg_addr+0x10, val); | |
1da177e4 LT |
193 | } |
194 | ||
195 | static u32 sis_scr_read (struct ata_port *ap, unsigned int sc_reg) | |
196 | { | |
f2c853bc AP |
197 | struct pci_dev *pdev = to_pci_dev(ap->host_set->dev); |
198 | u32 val,val2; | |
199 | u8 pmr; | |
200 | ||
1da177e4 LT |
201 | if (sc_reg > SCR_CONTROL) |
202 | return 0xffffffffU; | |
203 | ||
204 | if (ap->flags & SIS_FLAG_CFGSCR) | |
205 | return sis_scr_cfg_read(ap, sc_reg); | |
f2c853bc AP |
206 | |
207 | pci_read_config_byte(pdev, SIS_PMR, &pmr); | |
208 | ||
209 | val = inl(ap->ioaddr.scr_addr + (sc_reg * 4)); | |
210 | ||
211 | if ((pdev->device == 0x182) || (pmr & SIS_PMR_COMBINED)) | |
212 | val2 = inl(ap->ioaddr.scr_addr + (sc_reg * 4)+0x10); | |
213 | ||
214 | return val|val2; | |
1da177e4 LT |
215 | } |
216 | ||
217 | static void sis_scr_write (struct ata_port *ap, unsigned int sc_reg, u32 val) | |
218 | { | |
f2c853bc AP |
219 | struct pci_dev *pdev = to_pci_dev(ap->host_set->dev); |
220 | u8 pmr; | |
221 | ||
1da177e4 LT |
222 | if (sc_reg > SCR_CONTROL) |
223 | return; | |
224 | ||
f2c853bc AP |
225 | pci_read_config_byte(pdev, SIS_PMR, &pmr); |
226 | ||
1da177e4 LT |
227 | if (ap->flags & SIS_FLAG_CFGSCR) |
228 | sis_scr_cfg_write(ap, sc_reg, val); | |
f2c853bc | 229 | else { |
1da177e4 | 230 | outl(val, ap->ioaddr.scr_addr + (sc_reg * 4)); |
f2c853bc AP |
231 | if ((pdev->device == 0x182) || (pmr & SIS_PMR_COMBINED)) |
232 | outl(val, ap->ioaddr.scr_addr + (sc_reg * 4)+0x10); | |
233 | } | |
1da177e4 LT |
234 | } |
235 | ||
1da177e4 LT |
236 | static int sis_init_one (struct pci_dev *pdev, const struct pci_device_id *ent) |
237 | { | |
238 | struct ata_probe_ent *probe_ent = NULL; | |
239 | int rc; | |
240 | u32 genctl; | |
241 | struct ata_port_info *ppi; | |
242 | int pci_dev_busy = 0; | |
f2c853bc AP |
243 | u8 pmr; |
244 | u8 port2_start; | |
1da177e4 LT |
245 | |
246 | rc = pci_enable_device(pdev); | |
247 | if (rc) | |
248 | return rc; | |
249 | ||
250 | rc = pci_request_regions(pdev, DRV_NAME); | |
251 | if (rc) { | |
252 | pci_dev_busy = 1; | |
253 | goto err_out; | |
254 | } | |
255 | ||
256 | rc = pci_set_dma_mask(pdev, ATA_DMA_MASK); | |
257 | if (rc) | |
258 | goto err_out_regions; | |
259 | rc = pci_set_consistent_dma_mask(pdev, ATA_DMA_MASK); | |
260 | if (rc) | |
261 | goto err_out_regions; | |
262 | ||
263 | ppi = &sis_port_info; | |
264 | probe_ent = ata_pci_init_native_mode(pdev, &ppi); | |
265 | if (!probe_ent) { | |
266 | rc = -ENOMEM; | |
267 | goto err_out_regions; | |
268 | } | |
269 | ||
270 | /* check and see if the SCRs are in IO space or PCI cfg space */ | |
271 | pci_read_config_dword(pdev, SIS_GENCTL, &genctl); | |
272 | if ((genctl & GENCTL_IOMAPPED_SCR) == 0) | |
273 | probe_ent->host_flags |= SIS_FLAG_CFGSCR; | |
8a60a071 | 274 | |
1da177e4 LT |
275 | /* if hardware thinks SCRs are in IO space, but there are |
276 | * no IO resources assigned, change to PCI cfg space. | |
277 | */ | |
278 | if ((!(probe_ent->host_flags & SIS_FLAG_CFGSCR)) && | |
279 | ((pci_resource_start(pdev, SIS_SCR_PCI_BAR) == 0) || | |
280 | (pci_resource_len(pdev, SIS_SCR_PCI_BAR) < 128))) { | |
281 | genctl &= ~GENCTL_IOMAPPED_SCR; | |
282 | pci_write_config_dword(pdev, SIS_GENCTL, genctl); | |
283 | probe_ent->host_flags |= SIS_FLAG_CFGSCR; | |
284 | } | |
285 | ||
f2c853bc AP |
286 | pci_read_config_byte(pdev, SIS_PMR, &pmr); |
287 | if (ent->device != 0x182) { | |
288 | if ((pmr & SIS_PMR_COMBINED) == 0) { | |
289 | printk(KERN_INFO "sata_sis: Detected SiS 180/181 chipset in SATA mode\n"); | |
290 | port2_start=0x64; | |
291 | } | |
292 | else { | |
293 | printk(KERN_INFO "sata_sis: Detected SiS 180/181 chipset in combined mode\n"); | |
294 | port2_start=0; | |
295 | } | |
296 | } | |
297 | else { | |
298 | printk(KERN_INFO "sata_sis: Detected SiS 182 chipset\n"); | |
299 | port2_start = 0x20; | |
300 | } | |
301 | ||
1da177e4 LT |
302 | if (!(probe_ent->host_flags & SIS_FLAG_CFGSCR)) { |
303 | probe_ent->port[0].scr_addr = | |
304 | pci_resource_start(pdev, SIS_SCR_PCI_BAR); | |
305 | probe_ent->port[1].scr_addr = | |
f2c853bc | 306 | pci_resource_start(pdev, SIS_SCR_PCI_BAR) + port2_start; |
1da177e4 LT |
307 | } |
308 | ||
309 | pci_set_master(pdev); | |
a04ce0ff | 310 | pci_intx(pdev, 1); |
1da177e4 LT |
311 | |
312 | /* FIXME: check ata_device_add return value */ | |
313 | ata_device_add(probe_ent); | |
314 | kfree(probe_ent); | |
315 | ||
316 | return 0; | |
317 | ||
318 | err_out_regions: | |
319 | pci_release_regions(pdev); | |
320 | ||
321 | err_out: | |
322 | if (!pci_dev_busy) | |
323 | pci_disable_device(pdev); | |
324 | return rc; | |
325 | ||
326 | } | |
327 | ||
328 | static int __init sis_init(void) | |
329 | { | |
330 | return pci_module_init(&sis_pci_driver); | |
331 | } | |
332 | ||
333 | static void __exit sis_exit(void) | |
334 | { | |
335 | pci_unregister_driver(&sis_pci_driver); | |
336 | } | |
337 | ||
338 | module_init(sis_init); | |
339 | module_exit(sis_exit); | |
340 |