2 * pata_sil680.c - SIL680 PATA for new ATA layer
4 * Alan Cox <alan@redhat.com>
8 * linux/drivers/ide/pci/siimage.c Version 1.07 Nov 30, 2003
10 * Copyright (C) 2001-2002 Andre Hedrick <andre@linux-ide.org>
11 * Copyright (C) 2003 Red Hat <alan@redhat.com>
13 * May be copied or modified under the terms of the GNU General Public License
15 * Documentation publically available.
17 * If you have strange problems with nVidia chipset systems please
18 * see the SI support documentation and update your system BIOS
22 * If we know all our devices are LBA28 (or LBA28 sized) we could use
23 * the command fifo mode.
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>
35 #define DRV_NAME "pata_sil680"
36 #define DRV_VERSION "0.4.6"
39 * sil680_selreg - return register base
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
49 static unsigned long sil680_selreg(struct ata_port *ap, int r)
51 unsigned long base = 0xA0 + r;
52 base += (ap->port_no << 4);
57 * sil680_seldev - return register base
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.
66 static unsigned long sil680_seldev(struct ata_port *ap, struct ata_device *adev, int r)
68 unsigned long base = 0xA0 + r;
69 base += (ap->port_no << 4);
70 base |= adev->devno ? 2 : 0;
76 * sil680_cable_detect - cable detection
79 * Perform cable detection. The SIL680 stores this in PCI config
83 static 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);
87 pci_read_config_byte(pdev, addr, &ata66);
89 return ATA_CBL_PATA80;
91 return ATA_CBL_PATA40;
95 * sil680_bus_reset - reset the SIL680 bus
96 * @ap: ATA port to reset
97 * @deadline: deadline jiffies for the operation
99 * Perform the SIL680 housekeeping when doing an ATA bus reset
102 static int sil680_bus_reset(struct ata_port *ap,unsigned int *classes,
103 unsigned long deadline)
105 struct pci_dev *pdev = to_pci_dev(ap->host->dev);
106 unsigned long addr = sil680_selreg(ap, 0);
109 pci_read_config_byte(pdev, addr, &reset);
110 pci_write_config_byte(pdev, addr, reset | 0x03);
112 pci_write_config_byte(pdev, addr, reset);
113 return ata_std_softreset(ap, classes, deadline);
116 static void sil680_error_handler(struct ata_port *ap)
118 ata_bmdma_drive_eh(ap, ata_std_prereset, sil680_bus_reset, NULL, ata_std_postreset);
122 * sil680_set_piomode - set initial PIO mode data
126 * Program the SIL680 registers for PIO mode. Note that the task speed
127 * registers are shared between the devices so we must pick the lowest
128 * mode for command work.
131 static void sil680_set_piomode(struct ata_port *ap, struct ata_device *adev)
133 static u16 speed_p[5] = { 0x328A, 0x2283, 0x1104, 0x10C3, 0x10C1 };
134 static u16 speed_t[5] = { 0x328A, 0x2283, 0x1281, 0x10C3, 0x10C1 };
136 unsigned long tfaddr = sil680_selreg(ap, 0x02);
137 unsigned long addr = sil680_seldev(ap, adev, 0x04);
138 unsigned long addr_mask = 0x80 + 4 * ap->port_no;
139 struct pci_dev *pdev = to_pci_dev(ap->host->dev);
140 int pio = adev->pio_mode - XFER_PIO_0;
141 int lowest_pio = pio;
142 int port_shift = 4 * adev->devno;
146 struct ata_device *pair = ata_dev_pair(adev);
148 if (pair != NULL && adev->pio_mode > pair->pio_mode)
149 lowest_pio = pair->pio_mode - XFER_PIO_0;
151 pci_write_config_word(pdev, addr, speed_p[pio]);
152 pci_write_config_word(pdev, tfaddr, speed_t[lowest_pio]);
154 pci_read_config_word(pdev, tfaddr-2, ®);
155 pci_read_config_byte(pdev, addr_mask, &mode);
157 reg &= ~0x0200; /* Clear IORDY */
158 mode &= ~(3 << port_shift); /* Clear IORDY and DMA bits */
160 if (ata_pio_need_iordy(adev)) {
161 reg |= 0x0200; /* Enable IORDY */
162 mode |= 1 << port_shift;
164 pci_write_config_word(pdev, tfaddr-2, reg);
165 pci_write_config_byte(pdev, addr_mask, mode);
169 * sil680_set_dmamode - set initial DMA mode data
173 * Program the MWDMA/UDMA modes for the sil680 k
174 * chipset. The MWDMA mode values are pulled from a lookup table
175 * while the chipset uses mode number for UDMA.
178 static void sil680_set_dmamode(struct ata_port *ap, struct ata_device *adev)
180 static u8 ultra_table[2][7] = {
181 { 0x0C, 0x07, 0x05, 0x04, 0x02, 0x01, 0xFF }, /* 100MHz */
182 { 0x0F, 0x0B, 0x07, 0x05, 0x03, 0x02, 0x01 }, /* 133Mhz */
184 static u16 dma_table[3] = { 0x2208, 0x10C2, 0x10C1 };
186 struct pci_dev *pdev = to_pci_dev(ap->host->dev);
187 unsigned long ma = sil680_seldev(ap, adev, 0x08);
188 unsigned long ua = sil680_seldev(ap, adev, 0x0C);
189 unsigned long addr_mask = 0x80 + 4 * ap->port_no;
190 int port_shift = adev->devno * 4;
194 pci_read_config_byte(pdev, 0x8A, &scsc);
195 pci_read_config_byte(pdev, addr_mask, &mode);
196 pci_read_config_word(pdev, ma, &multi);
197 pci_read_config_word(pdev, ua, &ultra);
199 /* Mask timing bits */
201 mode &= ~(0x03 << port_shift);
204 scsc = (scsc & 0x30) ? 1: 0;
206 if (adev->dma_mode >= XFER_UDMA_0) {
208 ultra |= ultra_table[scsc][adev->dma_mode - XFER_UDMA_0];
209 mode |= (0x03 << port_shift);
211 multi = dma_table[adev->dma_mode - XFER_MW_DMA_0];
212 mode |= (0x02 << port_shift);
214 pci_write_config_byte(pdev, addr_mask, mode);
215 pci_write_config_word(pdev, ma, multi);
216 pci_write_config_word(pdev, ua, ultra);
219 static struct scsi_host_template sil680_sht = {
220 .module = THIS_MODULE,
222 .ioctl = ata_scsi_ioctl,
223 .queuecommand = ata_scsi_queuecmd,
224 .can_queue = ATA_DEF_QUEUE,
225 .this_id = ATA_SHT_THIS_ID,
226 .sg_tablesize = LIBATA_MAX_PRD,
227 .cmd_per_lun = ATA_SHT_CMD_PER_LUN,
228 .emulated = ATA_SHT_EMULATED,
229 .use_clustering = ATA_SHT_USE_CLUSTERING,
230 .proc_name = DRV_NAME,
231 .dma_boundary = ATA_DMA_BOUNDARY,
232 .slave_configure = ata_scsi_slave_config,
233 .slave_destroy = ata_scsi_slave_destroy,
234 .bios_param = ata_std_bios_param,
237 static struct ata_port_operations sil680_port_ops = {
238 .port_disable = ata_port_disable,
239 .set_piomode = sil680_set_piomode,
240 .set_dmamode = sil680_set_dmamode,
241 .mode_filter = ata_pci_default_filter,
242 .tf_load = ata_tf_load,
243 .tf_read = ata_tf_read,
244 .check_status = ata_check_status,
245 .exec_command = ata_exec_command,
246 .dev_select = ata_std_dev_select,
248 .freeze = ata_bmdma_freeze,
249 .thaw = ata_bmdma_thaw,
250 .error_handler = sil680_error_handler,
251 .post_internal_cmd = ata_bmdma_post_internal_cmd,
252 .cable_detect = sil680_cable_detect,
254 .bmdma_setup = ata_bmdma_setup,
255 .bmdma_start = ata_bmdma_start,
256 .bmdma_stop = ata_bmdma_stop,
257 .bmdma_status = ata_bmdma_status,
259 .qc_prep = ata_qc_prep,
260 .qc_issue = ata_qc_issue_prot,
262 .data_xfer = ata_data_xfer,
264 .irq_handler = ata_interrupt,
265 .irq_clear = ata_bmdma_irq_clear,
266 .irq_on = ata_irq_on,
267 .irq_ack = ata_irq_ack,
269 .port_start = ata_port_start,
273 * sil680_init_chip - chip setup
276 * Perform all the chip setup which must be done both when the device
277 * is powered up on boot and when we resume in case we resumed from RAM.
278 * Returns the final clock settings.
281 static u8 sil680_init_chip(struct pci_dev *pdev)
286 pci_read_config_dword(pdev, PCI_CLASS_REVISION, &class_rev);
288 /* FIXME: double check */
289 pci_write_config_byte(pdev, PCI_CACHE_LINE_SIZE, (class_rev) ? 1 : 255);
291 pci_write_config_byte(pdev, 0x80, 0x00);
292 pci_write_config_byte(pdev, 0x84, 0x00);
294 pci_read_config_byte(pdev, 0x8A, &tmpbyte);
296 printk(KERN_INFO "sil680: BA5_EN = %d clock = %02X\n",
297 tmpbyte & 1, tmpbyte & 0x30);
299 switch(tmpbyte & 0x30) {
301 /* 133 clock attempt to force it on */
302 pci_write_config_byte(pdev, 0x8A, tmpbyte|0x10);
305 /* if clocking is disabled */
306 /* 133 clock attempt to force it on */
307 pci_write_config_byte(pdev, 0x8A, tmpbyte & ~0x20);
313 /* BIOS set PCI x2 clocking */
317 pci_read_config_byte(pdev, 0x8A, &tmpbyte);
318 printk(KERN_INFO "sil680: BA5_EN = %d clock = %02X\n",
319 tmpbyte & 1, tmpbyte & 0x30);
321 pci_write_config_byte(pdev, 0xA1, 0x72);
322 pci_write_config_word(pdev, 0xA2, 0x328A);
323 pci_write_config_dword(pdev, 0xA4, 0x62DD62DD);
324 pci_write_config_dword(pdev, 0xA8, 0x43924392);
325 pci_write_config_dword(pdev, 0xAC, 0x40094009);
326 pci_write_config_byte(pdev, 0xB1, 0x72);
327 pci_write_config_word(pdev, 0xB2, 0x328A);
328 pci_write_config_dword(pdev, 0xB4, 0x62DD62DD);
329 pci_write_config_dword(pdev, 0xB8, 0x43924392);
330 pci_write_config_dword(pdev, 0xBC, 0x40094009);
332 switch(tmpbyte & 0x30) {
333 case 0x00: printk(KERN_INFO "sil680: 100MHz clock.\n");break;
334 case 0x10: printk(KERN_INFO "sil680: 133MHz clock.\n");break;
335 case 0x20: printk(KERN_INFO "sil680: Using PCI clock.\n");break;
336 /* This last case is _NOT_ ok */
337 case 0x30: printk(KERN_ERR "sil680: Clock disabled ?\n");
339 return tmpbyte & 0x30;
342 static int sil680_init_one(struct pci_dev *pdev, const struct pci_device_id *id)
344 static const struct ata_port_info info = {
346 .flags = ATA_FLAG_SLAVE_POSS,
350 .port_ops = &sil680_port_ops
352 static const struct ata_port_info info_slow = {
354 .flags = ATA_FLAG_SLAVE_POSS,
358 .port_ops = &sil680_port_ops
360 const struct ata_port_info *ppi[] = { &info, NULL };
361 static int printed_version;
363 if (!printed_version++)
364 dev_printk(KERN_DEBUG, &pdev->dev, "version " DRV_VERSION "\n");
366 switch(sil680_init_chip(pdev))
374 return ata_pci_init_one(pdev, ppi);
378 static int sil680_reinit_one(struct pci_dev *pdev)
380 sil680_init_chip(pdev);
381 return ata_pci_device_resume(pdev);
385 static const struct pci_device_id sil680[] = {
386 { PCI_VDEVICE(CMD, PCI_DEVICE_ID_SII_680), },
391 static struct pci_driver sil680_pci_driver = {
394 .probe = sil680_init_one,
395 .remove = ata_pci_remove_one,
397 .suspend = ata_pci_device_suspend,
398 .resume = sil680_reinit_one,
402 static int __init sil680_init(void)
404 return pci_register_driver(&sil680_pci_driver);
407 static void __exit sil680_exit(void)
409 pci_unregister_driver(&sil680_pci_driver);
412 MODULE_AUTHOR("Alan Cox");
413 MODULE_DESCRIPTION("low-level driver for SI680 PATA");
414 MODULE_LICENSE("GPL");
415 MODULE_DEVICE_TABLE(pci, sil680);
416 MODULE_VERSION(DRV_VERSION);
418 module_init(sil680_init);
419 module_exit(sil680_exit);