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 "0.4.1"
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;
94 static int sil680_pre_reset(struct ata_port *ap)
96 ap->cbl = sil680_cable_detect(ap);
97 return ata_std_prereset(ap);
101 * sil680_bus_reset - reset the SIL680 bus
102 * @ap: ATA port to reset
104 * Perform the SIL680 housekeeping when doing an ATA bus reset
107 static int sil680_bus_reset(struct ata_port *ap,unsigned int *classes)
109 struct pci_dev *pdev = to_pci_dev(ap->host->dev);
110 unsigned long addr = sil680_selreg(ap, 0);
113 pci_read_config_byte(pdev, addr, &reset);
114 pci_write_config_byte(pdev, addr, reset | 0x03);
116 pci_write_config_byte(pdev, addr, reset);
117 return ata_std_softreset(ap, classes);
120 static void sil680_error_handler(struct ata_port *ap)
122 ata_bmdma_drive_eh(ap, sil680_pre_reset, sil680_bus_reset, NULL, ata_std_postreset);
126 * sil680_set_piomode - set initial PIO mode data
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.
135 static void sil680_set_piomode(struct ata_port *ap, struct ata_device *adev)
137 static u16 speed_p[5] = { 0x328A, 0x2283, 0x1104, 0x10C3, 0x10C1 };
138 static u16 speed_t[5] = { 0x328A, 0x1281, 0x1281, 0x10C3, 0x10C1 };
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;
147 struct ata_device *pair = ata_dev_pair(adev);
149 if (pair != NULL && adev->pio_mode > pair->pio_mode)
150 lowest_pio = pair->pio_mode - XFER_PIO_0;
152 pci_write_config_word(pdev, addr, speed_p[pio]);
153 pci_write_config_word(pdev, tfaddr, speed_t[lowest_pio]);
155 pci_read_config_word(pdev, tfaddr-2, ®);
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);
163 * sil680_set_dmamode - set initial DMA mode data
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.
172 static void sil680_set_dmamode(struct ata_port *ap, struct ata_device *adev)
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 */
178 static u16 dma_table[3] = { 0x2208, 0x10C2, 0x10C1 };
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;
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);
193 /* Mask timing bits */
195 mode &= ~(0x03 << port_shift);
198 scsc = (scsc & 0x30) ? 1: 0;
200 if (adev->dma_mode >= XFER_UDMA_0) {
202 ultra |= ultra_table[scsc][adev->dma_mode - XFER_UDMA_0];
203 mode |= (0x03 << port_shift);
205 multi = dma_table[adev->dma_mode - XFER_MW_DMA_0];
206 mode |= (0x02 << port_shift);
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);
213 static struct scsi_host_template sil680_sht = {
214 .module = THIS_MODULE,
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 .cmd_per_lun = ATA_SHT_CMD_PER_LUN,
222 .emulated = ATA_SHT_EMULATED,
223 .use_clustering = ATA_SHT_USE_CLUSTERING,
224 .proc_name = DRV_NAME,
225 .dma_boundary = ATA_DMA_BOUNDARY,
226 .slave_configure = ata_scsi_slave_config,
227 .slave_destroy = ata_scsi_slave_destroy,
228 .bios_param = ata_std_bios_param,
231 static 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,
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,
247 .bmdma_setup = ata_bmdma_setup,
248 .bmdma_start = ata_bmdma_start,
249 .bmdma_stop = ata_bmdma_stop,
250 .bmdma_status = ata_bmdma_status,
252 .qc_prep = ata_qc_prep,
253 .qc_issue = ata_qc_issue_prot,
255 .data_xfer = ata_pio_data_xfer,
257 .irq_handler = ata_interrupt,
258 .irq_clear = ata_bmdma_irq_clear,
260 .port_start = ata_port_start,
261 .port_stop = ata_port_stop,
262 .host_stop = ata_host_stop
266 * sil680_init_chip - chip setup
269 * Perform all the chip setup which must be done both when the device
270 * is powered up on boot and when we resume in case we resumed from RAM.
271 * Returns the final clock settings.
274 static u8 sil680_init_chip(struct pci_dev *pdev)
279 pci_read_config_dword(pdev, PCI_CLASS_REVISION, &class_rev);
281 /* FIXME: double check */
282 pci_write_config_byte(pdev, PCI_CACHE_LINE_SIZE, (class_rev) ? 1 : 255);
284 pci_write_config_byte(pdev, 0x80, 0x00);
285 pci_write_config_byte(pdev, 0x84, 0x00);
287 pci_read_config_byte(pdev, 0x8A, &tmpbyte);
289 printk(KERN_INFO "sil680: BA5_EN = %d clock = %02X\n",
290 tmpbyte & 1, tmpbyte & 0x30);
292 switch(tmpbyte & 0x30) {
294 /* 133 clock attempt to force it on */
295 pci_write_config_byte(pdev, 0x8A, tmpbyte|0x10);
298 /* if clocking is disabled */
299 /* 133 clock attempt to force it on */
300 pci_write_config_byte(pdev, 0x8A, tmpbyte & ~0x20);
306 /* BIOS set PCI x2 clocking */
310 pci_read_config_byte(pdev, 0x8A, &tmpbyte);
311 printk(KERN_INFO "sil680: BA5_EN = %d clock = %02X\n",
312 tmpbyte & 1, tmpbyte & 0x30);
314 pci_write_config_byte(pdev, 0xA1, 0x72);
315 pci_write_config_word(pdev, 0xA2, 0x328A);
316 pci_write_config_dword(pdev, 0xA4, 0x62DD62DD);
317 pci_write_config_dword(pdev, 0xA8, 0x43924392);
318 pci_write_config_dword(pdev, 0xAC, 0x40094009);
319 pci_write_config_byte(pdev, 0xB1, 0x72);
320 pci_write_config_word(pdev, 0xB2, 0x328A);
321 pci_write_config_dword(pdev, 0xB4, 0x62DD62DD);
322 pci_write_config_dword(pdev, 0xB8, 0x43924392);
323 pci_write_config_dword(pdev, 0xBC, 0x40094009);
325 switch(tmpbyte & 0x30) {
326 case 0x00: printk(KERN_INFO "sil680: 100MHz clock.\n");break;
327 case 0x10: printk(KERN_INFO "sil680: 133MHz clock.\n");break;
328 case 0x20: printk(KERN_INFO "sil680: Using PCI clock.\n");break;
329 /* This last case is _NOT_ ok */
330 case 0x30: printk(KERN_ERR "sil680: Clock disabled ?\n");
332 return tmpbyte & 0x30;
335 static int sil680_init_one(struct pci_dev *pdev, const struct pci_device_id *id)
337 static struct ata_port_info info = {
339 .flags = ATA_FLAG_SLAVE_POSS | ATA_FLAG_SRST,
343 .port_ops = &sil680_port_ops
345 static struct ata_port_info info_slow = {
347 .flags = ATA_FLAG_SLAVE_POSS | ATA_FLAG_SRST,
351 .port_ops = &sil680_port_ops
353 static struct ata_port_info *port_info[2] = {&info, &info};
354 static int printed_version;
356 if (!printed_version++)
357 dev_printk(KERN_DEBUG, &pdev->dev, "version " DRV_VERSION "\n");
359 switch(sil680_init_chip(pdev))
362 port_info[0] = port_info[1] = &info_slow;
367 return ata_pci_init_one(pdev, port_info, 2);
370 static int sil680_reinit_one(struct pci_dev *pdev)
372 sil680_init_chip(pdev);
373 return ata_pci_device_resume(pdev);
376 static const struct pci_device_id sil680[] = {
377 { PCI_VDEVICE(CMD, PCI_DEVICE_ID_SII_680), },
382 static struct pci_driver sil680_pci_driver = {
385 .probe = sil680_init_one,
386 .remove = ata_pci_remove_one,
387 .suspend = ata_pci_device_suspend,
388 .resume = sil680_reinit_one,
391 static int __init sil680_init(void)
393 return pci_register_driver(&sil680_pci_driver);
396 static void __exit sil680_exit(void)
398 pci_unregister_driver(&sil680_pci_driver);
401 MODULE_AUTHOR("Alan Cox");
402 MODULE_DESCRIPTION("low-level driver for SI680 PATA");
403 MODULE_LICENSE("GPL");
404 MODULE_DEVICE_TABLE(pci, sil680);
405 MODULE_VERSION(DRV_VERSION);
407 module_init(sil680_init);
408 module_exit(sil680_exit);