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Jeff Garzik669a5db2006-08-29 18:12:40 -04001/*
2 * pata_sil680.c - SIL680 PATA for new ATA layer
3 * (C) 2005 Red Hat Inc
4 * Alan Cox <alan@redhat.com>
5 *
6 * based upon
7 *
8 * linux/drivers/ide/pci/siimage.c Version 1.07 Nov 30, 2003
9 *
10 * Copyright (C) 2001-2002 Andre Hedrick <andre@linux-ide.org>
11 * Copyright (C) 2003 Red Hat <alan@redhat.com>
12 *
13 * May be copied or modified under the terms of the GNU General Public License
14 *
15 * Documentation publically available.
16 *
17 * If you have strange problems with nVidia chipset systems please
18 * see the SI support documentation and update your system BIOS
19 * if neccessary
20 *
21 * TODO
22 * If we know all our devices are LBA28 (or LBA28 sized) we could use
23 * the command fifo mode.
24 */
25
26#include <linux/kernel.h>
27#include <linux/module.h>
28#include <linux/pci.h>
29#include <linux/init.h>
30#include <linux/blkdev.h>
31#include <linux/delay.h>
32#include <scsi/scsi_host.h>
33#include <linux/libata.h>
34
35#define DRV_NAME "pata_sil680"
36#define DRV_VERSION "0.3.2"
37
38/**
39 * sil680_selreg - return register base
40 * @hwif: interface
41 * @r: config offset
42 *
43 * Turn a config register offset into the right address in either
44 * PCI space or MMIO space to access the control register in question
45 * Thankfully this is a configuration operation so isnt performance
46 * criticial.
47 */
48
49static unsigned long sil680_selreg(struct ata_port *ap, int r)
50{
51 unsigned long base = 0xA0 + r;
52 base += (ap->port_no << 4);
53 return base;
54}
55
56/**
57 * sil680_seldev - return register base
58 * @hwif: interface
59 * @r: config offset
60 *
61 * Turn a config register offset into the right address in either
62 * PCI space or MMIO space to access the control register in question
63 * including accounting for the unit shift.
64 */
65
66static unsigned long sil680_seldev(struct ata_port *ap, struct ata_device *adev, int r)
67{
68 unsigned long base = 0xA0 + r;
69 base += (ap->port_no << 4);
70 base |= adev->devno ? 2 : 0;
71 return base;
72}
73
74
75/**
76 * sil680_cable_detect - cable detection
77 * @ap: ATA port
78 *
79 * Perform cable detection. The SIL680 stores this in PCI config
80 * space for us.
81 */
82
83static int sil680_cable_detect(struct ata_port *ap) {
84 struct pci_dev *pdev = to_pci_dev(ap->host->dev);
85 unsigned long addr = sil680_selreg(ap, 0);
86 u8 ata66;
87 pci_read_config_byte(pdev, addr, &ata66);
88 if (ata66 & 1)
89 return ATA_CBL_PATA80;
90 else
91 return ATA_CBL_PATA40;
92}
93
94static int sil680_pre_reset(struct ata_port *ap)
95{
96 ap->cbl = sil680_cable_detect(ap);
97 return ata_std_prereset(ap);
98}
99
100/**
101 * sil680_bus_reset - reset the SIL680 bus
102 * @ap: ATA port to reset
103 *
104 * Perform the SIL680 housekeeping when doing an ATA bus reset
105 */
106
107static int sil680_bus_reset(struct ata_port *ap,unsigned int *classes)
108{
109 struct pci_dev *pdev = to_pci_dev(ap->host->dev);
110 unsigned long addr = sil680_selreg(ap, 0);
111 u8 reset;
112
113 pci_read_config_byte(pdev, addr, &reset);
114 pci_write_config_byte(pdev, addr, reset | 0x03);
115 udelay(25);
116 pci_write_config_byte(pdev, addr, reset);
117 return ata_std_softreset(ap, classes);
118}
119
120static void sil680_error_handler(struct ata_port *ap)
121{
122 ata_bmdma_drive_eh(ap, sil680_pre_reset, sil680_bus_reset, NULL, ata_std_postreset);
123}
124
125/**
126 * sil680_set_piomode - set initial PIO mode data
127 * @ap: ATA interface
128 * @adev: ATA device
129 *
130 * Program the SIL680 registers for PIO mode. Note that the task speed
131 * registers are shared between the devices so we must pick the lowest
132 * mode for command work.
133 */
134
135static void sil680_set_piomode(struct ata_port *ap, struct ata_device *adev)
136{
137 static u16 speed_p[5] = { 0x328A, 0x2283, 0x1104, 0x10C3, 0x10C1 };
138 static u16 speed_t[5] = { 0x328A, 0x1281, 0x1281, 0x10C3, 0x10C1 };
139
140 unsigned long tfaddr = sil680_selreg(ap, 0x02);
141 unsigned long addr = sil680_seldev(ap, adev, 0x04);
142 struct pci_dev *pdev = to_pci_dev(ap->host->dev);
143 int pio = adev->pio_mode - XFER_PIO_0;
144 int lowest_pio = pio;
145 u16 reg;
146
147 struct ata_device *pair = ata_dev_pair(adev);
148
149 if (pair != NULL && adev->pio_mode > pair->pio_mode)
150 lowest_pio = pair->pio_mode - XFER_PIO_0;
151
152 pci_write_config_word(pdev, addr, speed_p[pio]);
153 pci_write_config_word(pdev, tfaddr, speed_t[lowest_pio]);
154
155 pci_read_config_word(pdev, tfaddr-2, &reg);
156 reg &= ~0x0200; /* Clear IORDY */
157 if (ata_pio_need_iordy(adev))
158 reg |= 0x0200; /* Enable IORDY */
159 pci_write_config_word(pdev, tfaddr-2, reg);
160}
161
162/**
163 * sil680_set_dmamode - set initial DMA mode data
164 * @ap: ATA interface
165 * @adev: ATA device
166 *
167 * Program the MWDMA/UDMA modes for the sil680 k
168 * chipset. The MWDMA mode values are pulled from a lookup table
169 * while the chipset uses mode number for UDMA.
170 */
171
172static void sil680_set_dmamode(struct ata_port *ap, struct ata_device *adev)
173{
174 static u8 ultra_table[2][7] = {
175 { 0x0C, 0x07, 0x05, 0x04, 0x02, 0x01, 0xFF }, /* 100MHz */
176 { 0x0F, 0x0B, 0x07, 0x05, 0x03, 0x02, 0x01 }, /* 133Mhz */
177 };
178 static u16 dma_table[3] = { 0x2208, 0x10C2, 0x10C1 };
179
180 struct pci_dev *pdev = to_pci_dev(ap->host->dev);
181 unsigned long ma = sil680_seldev(ap, adev, 0x08);
182 unsigned long ua = sil680_seldev(ap, adev, 0x0C);
183 unsigned long addr_mask = 0x80 + 4 * ap->port_no;
184 int port_shift = adev->devno * 4;
185 u8 scsc, mode;
186 u16 multi, ultra;
187
188 pci_read_config_byte(pdev, 0x8A, &scsc);
189 pci_read_config_byte(pdev, addr_mask, &mode);
190 pci_read_config_word(pdev, ma, &multi);
191 pci_read_config_word(pdev, ua, &ultra);
192
193 /* Mask timing bits */
194 ultra &= ~0x3F;
195 mode &= ~(0x03 << port_shift);
196
197 /* Extract scsc */
198 scsc = (scsc & 0x30) ? 1: 0;
199
200 if (adev->dma_mode >= XFER_UDMA_0) {
201 multi = 0x10C1;
202 ultra |= ultra_table[scsc][adev->dma_mode - XFER_UDMA_0];
203 mode |= (0x03 << port_shift);
204 } else {
205 multi = dma_table[adev->dma_mode - XFER_MW_DMA_0];
206 mode |= (0x02 << port_shift);
207 }
208 pci_write_config_byte(pdev, addr_mask, mode);
209 pci_write_config_word(pdev, ma, multi);
210 pci_write_config_word(pdev, ua, ultra);
211}
212
213static struct scsi_host_template sil680_sht = {
214 .module = THIS_MODULE,
215 .name = DRV_NAME,
216 .ioctl = ata_scsi_ioctl,
217 .queuecommand = ata_scsi_queuecmd,
218 .can_queue = ATA_DEF_QUEUE,
219 .this_id = ATA_SHT_THIS_ID,
220 .sg_tablesize = LIBATA_MAX_PRD,
221 .max_sectors = ATA_MAX_SECTORS,
222 .cmd_per_lun = ATA_SHT_CMD_PER_LUN,
223 .emulated = ATA_SHT_EMULATED,
224 .use_clustering = ATA_SHT_USE_CLUSTERING,
225 .proc_name = DRV_NAME,
226 .dma_boundary = ATA_DMA_BOUNDARY,
227 .slave_configure = ata_scsi_slave_config,
228 .bios_param = ata_std_bios_param,
229};
230
231static struct ata_port_operations sil680_port_ops = {
232 .port_disable = ata_port_disable,
233 .set_piomode = sil680_set_piomode,
234 .set_dmamode = sil680_set_dmamode,
235 .mode_filter = ata_pci_default_filter,
236 .tf_load = ata_tf_load,
237 .tf_read = ata_tf_read,
238 .check_status = ata_check_status,
239 .exec_command = ata_exec_command,
240 .dev_select = ata_std_dev_select,
241
242 .freeze = ata_bmdma_freeze,
243 .thaw = ata_bmdma_thaw,
244 .error_handler = sil680_error_handler,
245 .post_internal_cmd = ata_bmdma_post_internal_cmd,
246
247 .bmdma_setup = ata_bmdma_setup,
248 .bmdma_start = ata_bmdma_start,
249 .bmdma_stop = ata_bmdma_stop,
250 .bmdma_status = ata_bmdma_status,
251
252 .qc_prep = ata_qc_prep,
253 .qc_issue = ata_qc_issue_prot,
Jeff Garzikbda30282006-09-27 05:41:13 -0400254
Jeff Garzik669a5db2006-08-29 18:12:40 -0400255 .data_xfer = ata_pio_data_xfer,
256
257 .irq_handler = ata_interrupt,
258 .irq_clear = ata_bmdma_irq_clear,
259
260 .port_start = ata_port_start,
261 .port_stop = ata_port_stop,
262 .host_stop = ata_host_stop
263};
264
265static int sil680_init_one(struct pci_dev *pdev, const struct pci_device_id *id)
266{
267 static struct ata_port_info info = {
268 .sht = &sil680_sht,
269 .flags = ATA_FLAG_SLAVE_POSS | ATA_FLAG_SRST,
270 .pio_mask = 0x1f,
271 .mwdma_mask = 0x07,
272 .udma_mask = 0x7f,
273 .port_ops = &sil680_port_ops
274 };
275 static struct ata_port_info info_slow = {
276 .sht = &sil680_sht,
277 .flags = ATA_FLAG_SLAVE_POSS | ATA_FLAG_SRST,
278 .pio_mask = 0x1f,
279 .mwdma_mask = 0x07,
280 .udma_mask = 0x3f,
281 .port_ops = &sil680_port_ops
282 };
283 static struct ata_port_info *port_info[2] = {&info, &info};
284 static int printed_version;
285 u32 class_rev = 0;
286 u8 tmpbyte = 0;
287
288 if (!printed_version++)
289 dev_printk(KERN_DEBUG, &pdev->dev, "version " DRV_VERSION "\n");
290
291 pci_read_config_dword(pdev, PCI_CLASS_REVISION, &class_rev);
292 class_rev &= 0xff;
293 /* FIXME: double check */
294 pci_write_config_byte(pdev, PCI_CACHE_LINE_SIZE, (class_rev) ? 1 : 255);
295
296 pci_write_config_byte(pdev, 0x80, 0x00);
297 pci_write_config_byte(pdev, 0x84, 0x00);
298
299 pci_read_config_byte(pdev, 0x8A, &tmpbyte);
300
301 printk(KERN_INFO "sil680: BA5_EN = %d clock = %02X\n",
302 tmpbyte & 1, tmpbyte & 0x30);
303
304 switch(tmpbyte & 0x30) {
305 case 0x00:
306 /* 133 clock attempt to force it on */
307 pci_write_config_byte(pdev, 0x8A, tmpbyte|0x10);
308 break;
309 case 0x30:
310 /* if clocking is disabled */
311 /* 133 clock attempt to force it on */
312 pci_write_config_byte(pdev, 0x8A, tmpbyte & ~0x20);
313 break;
314 case 0x10:
315 /* 133 already */
316 break;
317 case 0x20:
318 /* BIOS set PCI x2 clocking */
319 break;
320 }
321
322 pci_read_config_byte(pdev, 0x8A, &tmpbyte);
323 printk(KERN_INFO "sil680: BA5_EN = %d clock = %02X\n",
324 tmpbyte & 1, tmpbyte & 0x30);
325 if ((tmpbyte & 0x30) == 0)
326 port_info[0] = port_info[1] = &info_slow;
327
328 pci_write_config_byte(pdev, 0xA1, 0x72);
329 pci_write_config_word(pdev, 0xA2, 0x328A);
330 pci_write_config_dword(pdev, 0xA4, 0x62DD62DD);
331 pci_write_config_dword(pdev, 0xA8, 0x43924392);
332 pci_write_config_dword(pdev, 0xAC, 0x40094009);
333 pci_write_config_byte(pdev, 0xB1, 0x72);
334 pci_write_config_word(pdev, 0xB2, 0x328A);
335 pci_write_config_dword(pdev, 0xB4, 0x62DD62DD);
336 pci_write_config_dword(pdev, 0xB8, 0x43924392);
337 pci_write_config_dword(pdev, 0xBC, 0x40094009);
338
339 switch(tmpbyte & 0x30) {
340 case 0x00: printk(KERN_INFO "sil680: 100MHz clock.\n");break;
341 case 0x10: printk(KERN_INFO "sil680: 133MHz clock.\n");break;
342 case 0x20: printk(KERN_INFO "sil680: Using PCI clock.\n");break;
343 /* This last case is _NOT_ ok */
344 case 0x30: printk(KERN_ERR "sil680: Clock disabled ?\n");
345 return -EIO;
346 }
347 return ata_pci_init_one(pdev, port_info, 2);
348}
349
350static const struct pci_device_id sil680[] = {
Jeff Garzik2d2744f2006-09-28 20:21:59 -0400351 { PCI_VDEVICE(CMD, PCI_DEVICE_ID_SII_680), },
352
353 { },
Jeff Garzik669a5db2006-08-29 18:12:40 -0400354};
355
356static struct pci_driver sil680_pci_driver = {
Jeff Garzik2d2744f2006-09-28 20:21:59 -0400357 .name = DRV_NAME,
Jeff Garzik669a5db2006-08-29 18:12:40 -0400358 .id_table = sil680,
359 .probe = sil680_init_one,
360 .remove = ata_pci_remove_one
361};
362
363static int __init sil680_init(void)
364{
365 return pci_register_driver(&sil680_pci_driver);
366}
367
Jeff Garzik669a5db2006-08-29 18:12:40 -0400368static void __exit sil680_exit(void)
369{
370 pci_unregister_driver(&sil680_pci_driver);
371}
372
Jeff Garzik669a5db2006-08-29 18:12:40 -0400373MODULE_AUTHOR("Alan Cox");
374MODULE_DESCRIPTION("low-level driver for SI680 PATA");
375MODULE_LICENSE("GPL");
376MODULE_DEVICE_TABLE(pci, sil680);
377MODULE_VERSION(DRV_VERSION);
378
379module_init(sil680_init);
380module_exit(sil680_exit);