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 "0.4.8"
38 #define SIL680_MMIO_BAR 5
41 * sil680_selreg - return register base
45 * Turn a config register offset into the right address in either
46 * PCI space or MMIO space to access the control register in question
47 * Thankfully this is a configuration operation so isnt performance
51 static unsigned long sil680_selreg(struct ata_port *ap, int r)
53 unsigned long base = 0xA0 + r;
54 base += (ap->port_no << 4);
59 * sil680_seldev - return register base
63 * Turn a config register offset into the right address in either
64 * PCI space or MMIO space to access the control register in question
65 * including accounting for the unit shift.
68 static unsigned long sil680_seldev(struct ata_port *ap, struct ata_device *adev, int r)
70 unsigned long base = 0xA0 + r;
71 base += (ap->port_no << 4);
72 base |= adev->devno ? 2 : 0;
78 * sil680_cable_detect - cable detection
81 * Perform cable detection. The SIL680 stores this in PCI config
85 static int sil680_cable_detect(struct ata_port *ap) {
86 struct pci_dev *pdev = to_pci_dev(ap->host->dev);
87 unsigned long addr = sil680_selreg(ap, 0);
89 pci_read_config_byte(pdev, addr, &ata66);
91 return ATA_CBL_PATA80;
93 return ATA_CBL_PATA40;
97 * sil680_set_piomode - set initial PIO mode data
101 * Program the SIL680 registers for PIO mode. Note that the task speed
102 * registers are shared between the devices so we must pick the lowest
103 * mode for command work.
106 static void sil680_set_piomode(struct ata_port *ap, struct ata_device *adev)
108 static u16 speed_p[5] = { 0x328A, 0x2283, 0x1104, 0x10C3, 0x10C1 };
109 static u16 speed_t[5] = { 0x328A, 0x2283, 0x1281, 0x10C3, 0x10C1 };
111 unsigned long tfaddr = sil680_selreg(ap, 0x02);
112 unsigned long addr = sil680_seldev(ap, adev, 0x04);
113 unsigned long addr_mask = 0x80 + 4 * ap->port_no;
114 struct pci_dev *pdev = to_pci_dev(ap->host->dev);
115 int pio = adev->pio_mode - XFER_PIO_0;
116 int lowest_pio = pio;
117 int port_shift = 4 * adev->devno;
121 struct ata_device *pair = ata_dev_pair(adev);
123 if (pair != NULL && adev->pio_mode > pair->pio_mode)
124 lowest_pio = pair->pio_mode - XFER_PIO_0;
126 pci_write_config_word(pdev, addr, speed_p[pio]);
127 pci_write_config_word(pdev, tfaddr, speed_t[lowest_pio]);
129 pci_read_config_word(pdev, tfaddr-2, ®);
130 pci_read_config_byte(pdev, addr_mask, &mode);
132 reg &= ~0x0200; /* Clear IORDY */
133 mode &= ~(3 << port_shift); /* Clear IORDY and DMA bits */
135 if (ata_pio_need_iordy(adev)) {
136 reg |= 0x0200; /* Enable IORDY */
137 mode |= 1 << port_shift;
139 pci_write_config_word(pdev, tfaddr-2, reg);
140 pci_write_config_byte(pdev, addr_mask, mode);
144 * sil680_set_dmamode - set initial DMA mode data
148 * Program the MWDMA/UDMA modes for the sil680 k
149 * chipset. The MWDMA mode values are pulled from a lookup table
150 * while the chipset uses mode number for UDMA.
153 static void sil680_set_dmamode(struct ata_port *ap, struct ata_device *adev)
155 static u8 ultra_table[2][7] = {
156 { 0x0C, 0x07, 0x05, 0x04, 0x02, 0x01, 0xFF }, /* 100MHz */
157 { 0x0F, 0x0B, 0x07, 0x05, 0x03, 0x02, 0x01 }, /* 133Mhz */
159 static u16 dma_table[3] = { 0x2208, 0x10C2, 0x10C1 };
161 struct pci_dev *pdev = to_pci_dev(ap->host->dev);
162 unsigned long ma = sil680_seldev(ap, adev, 0x08);
163 unsigned long ua = sil680_seldev(ap, adev, 0x0C);
164 unsigned long addr_mask = 0x80 + 4 * ap->port_no;
165 int port_shift = adev->devno * 4;
169 pci_read_config_byte(pdev, 0x8A, &scsc);
170 pci_read_config_byte(pdev, addr_mask, &mode);
171 pci_read_config_word(pdev, ma, &multi);
172 pci_read_config_word(pdev, ua, &ultra);
174 /* Mask timing bits */
176 mode &= ~(0x03 << port_shift);
179 scsc = (scsc & 0x30) ? 1: 0;
181 if (adev->dma_mode >= XFER_UDMA_0) {
183 ultra |= ultra_table[scsc][adev->dma_mode - XFER_UDMA_0];
184 mode |= (0x03 << port_shift);
186 multi = dma_table[adev->dma_mode - XFER_MW_DMA_0];
187 mode |= (0x02 << port_shift);
189 pci_write_config_byte(pdev, addr_mask, mode);
190 pci_write_config_word(pdev, ma, multi);
191 pci_write_config_word(pdev, ua, ultra);
194 static struct scsi_host_template sil680_sht = {
195 ATA_BMDMA_SHT(DRV_NAME),
198 static struct ata_port_operations sil680_port_ops = {
199 .inherits = &ata_bmdma_port_ops,
200 .cable_detect = sil680_cable_detect,
201 .set_piomode = sil680_set_piomode,
202 .set_dmamode = sil680_set_dmamode,
206 * sil680_init_chip - chip setup
209 * Perform all the chip setup which must be done both when the device
210 * is powered up on boot and when we resume in case we resumed from RAM.
211 * Returns the final clock settings.
214 static u8 sil680_init_chip(struct pci_dev *pdev, int *try_mmio)
219 pci_read_config_dword(pdev, PCI_CLASS_REVISION, &class_rev);
221 /* FIXME: double check */
222 pci_write_config_byte(pdev, PCI_CACHE_LINE_SIZE, (class_rev) ? 1 : 255);
224 pci_write_config_byte(pdev, 0x80, 0x00);
225 pci_write_config_byte(pdev, 0x84, 0x00);
227 pci_read_config_byte(pdev, 0x8A, &tmpbyte);
229 dev_dbg(&pdev->dev, "sil680: BA5_EN = %d clock = %02X\n",
230 tmpbyte & 1, tmpbyte & 0x30);
233 #ifdef CONFIG_PPC_MERGE
234 if (machine_is(cell))
235 *try_mmio = (tmpbyte & 1) || pci_resource_start(pdev, 5);
238 switch(tmpbyte & 0x30) {
240 /* 133 clock attempt to force it on */
241 pci_write_config_byte(pdev, 0x8A, tmpbyte|0x10);
244 /* if clocking is disabled */
245 /* 133 clock attempt to force it on */
246 pci_write_config_byte(pdev, 0x8A, tmpbyte & ~0x20);
252 /* BIOS set PCI x2 clocking */
256 pci_read_config_byte(pdev, 0x8A, &tmpbyte);
257 dev_dbg(&pdev->dev, "sil680: BA5_EN = %d clock = %02X\n",
258 tmpbyte & 1, tmpbyte & 0x30);
260 pci_write_config_byte(pdev, 0xA1, 0x72);
261 pci_write_config_word(pdev, 0xA2, 0x328A);
262 pci_write_config_dword(pdev, 0xA4, 0x62DD62DD);
263 pci_write_config_dword(pdev, 0xA8, 0x43924392);
264 pci_write_config_dword(pdev, 0xAC, 0x40094009);
265 pci_write_config_byte(pdev, 0xB1, 0x72);
266 pci_write_config_word(pdev, 0xB2, 0x328A);
267 pci_write_config_dword(pdev, 0xB4, 0x62DD62DD);
268 pci_write_config_dword(pdev, 0xB8, 0x43924392);
269 pci_write_config_dword(pdev, 0xBC, 0x40094009);
271 switch(tmpbyte & 0x30) {
272 case 0x00: printk(KERN_INFO "sil680: 100MHz clock.\n");break;
273 case 0x10: printk(KERN_INFO "sil680: 133MHz clock.\n");break;
274 case 0x20: printk(KERN_INFO "sil680: Using PCI clock.\n");break;
275 /* This last case is _NOT_ ok */
276 case 0x30: printk(KERN_ERR "sil680: Clock disabled ?\n");
278 return tmpbyte & 0x30;
281 static int __devinit sil680_init_one(struct pci_dev *pdev,
282 const struct pci_device_id *id)
284 static const struct ata_port_info info = {
285 .flags = ATA_FLAG_SLAVE_POSS,
288 .udma_mask = ATA_UDMA6,
289 .port_ops = &sil680_port_ops
291 static const struct ata_port_info info_slow = {
292 .flags = ATA_FLAG_SLAVE_POSS,
295 .udma_mask = ATA_UDMA5,
296 .port_ops = &sil680_port_ops
298 const struct ata_port_info *ppi[] = { &info, NULL };
299 static int printed_version;
300 struct ata_host *host;
301 void __iomem *mmio_base;
304 if (!printed_version++)
305 dev_printk(KERN_DEBUG, &pdev->dev, "version " DRV_VERSION "\n");
307 rc = pcim_enable_device(pdev);
311 switch (sil680_init_chip(pdev, &try_mmio)) {
322 /* Try to acquire MMIO resources and fallback to PIO if
325 rc = pcim_enable_device(pdev);
328 rc = pcim_iomap_regions(pdev, 1 << SIL680_MMIO_BAR, DRV_NAME);
332 /* Allocate host and set it up */
333 host = ata_host_alloc_pinfo(&pdev->dev, ppi, 2);
336 host->iomap = pcim_iomap_table(pdev);
338 /* Setup DMA masks */
339 rc = pci_set_dma_mask(pdev, ATA_DMA_MASK);
342 rc = pci_set_consistent_dma_mask(pdev, ATA_DMA_MASK);
345 pci_set_master(pdev);
347 /* Get MMIO base and initialize port addresses */
348 mmio_base = host->iomap[SIL680_MMIO_BAR];
349 host->ports[0]->ioaddr.bmdma_addr = mmio_base + 0x00;
350 host->ports[0]->ioaddr.cmd_addr = mmio_base + 0x80;
351 host->ports[0]->ioaddr.ctl_addr = mmio_base + 0x8a;
352 host->ports[0]->ioaddr.altstatus_addr = mmio_base + 0x8a;
353 ata_sff_std_ports(&host->ports[0]->ioaddr);
354 host->ports[1]->ioaddr.bmdma_addr = mmio_base + 0x08;
355 host->ports[1]->ioaddr.cmd_addr = mmio_base + 0xc0;
356 host->ports[1]->ioaddr.ctl_addr = mmio_base + 0xca;
357 host->ports[1]->ioaddr.altstatus_addr = mmio_base + 0xca;
358 ata_sff_std_ports(&host->ports[1]->ioaddr);
360 /* Register & activate */
361 return ata_host_activate(host, pdev->irq, ata_sff_interrupt,
362 IRQF_SHARED, &sil680_sht);
365 return ata_pci_sff_init_one(pdev, ppi, &sil680_sht, NULL);
369 static int sil680_reinit_one(struct pci_dev *pdev)
371 struct ata_host *host = dev_get_drvdata(&pdev->dev);
374 rc = ata_pci_device_do_resume(pdev);
377 sil680_init_chip(pdev, &try_mmio);
378 ata_host_resume(host);
383 static const struct pci_device_id sil680[] = {
384 { PCI_VDEVICE(CMD, PCI_DEVICE_ID_SII_680), },
389 static struct pci_driver sil680_pci_driver = {
392 .probe = sil680_init_one,
393 .remove = ata_pci_remove_one,
395 .suspend = ata_pci_device_suspend,
396 .resume = sil680_reinit_one,
400 static int __init sil680_init(void)
402 return pci_register_driver(&sil680_pci_driver);
405 static void __exit sil680_exit(void)
407 pci_unregister_driver(&sil680_pci_driver);
410 MODULE_AUTHOR("Alan Cox");
411 MODULE_DESCRIPTION("low-level driver for SI680 PATA");
412 MODULE_LICENSE("GPL");
413 MODULE_DEVICE_TABLE(pci, sil680);
414 MODULE_VERSION(DRV_VERSION);
416 module_init(sil680_init);
417 module_exit(sil680_exit);