2 * pata_sil680.c - SIL680 PATA for new ATA layer
7 * linux/drivers/ide/pci/siimage.c Version 1.07 Nov 30, 2003
9 * Copyright (C) 2001-2002 Andre Hedrick <andre@linux-ide.org>
10 * Copyright (C) 2003 Red Hat <alan@redhat.com>
12 * May be copied or modified under the terms of the GNU General Public License
14 * Documentation publicly available.
16 * If you have strange problems with nVidia chipset systems please
17 * see the SI support documentation and update your system BIOS
21 * If we know all our devices are LBA28 (or LBA28 sized) we could use
22 * the command fifo mode.
25 #include <linux/kernel.h>
26 #include <linux/module.h>
27 #include <linux/pci.h>
28 #include <linux/init.h>
29 #include <linux/blkdev.h>
30 #include <linux/delay.h>
31 #include <scsi/scsi_host.h>
32 #include <linux/libata.h>
34 #define DRV_NAME "pata_sil680"
35 #define DRV_VERSION "0.4.9"
37 #define SIL680_MMIO_BAR 5
40 * sil680_selreg - return register base
44 * Turn a config register offset into the right address in PCI space
45 * to access the control register in question.
47 * Thankfully this is a configuration operation so isn't 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 PCI space
64 * to access the control register in question including accounting for
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 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 DMA mode data
148 * Program the MWDMA/UDMA modes for the sil680 chipset.
150 * The MWDMA mode values are pulled from a lookup table
151 * while the chipset uses mode number for UDMA.
154 static void sil680_set_dmamode(struct ata_port *ap, struct ata_device *adev)
156 static u8 ultra_table[2][7] = {
157 { 0x0C, 0x07, 0x05, 0x04, 0x02, 0x01, 0xFF }, /* 100MHz */
158 { 0x0F, 0x0B, 0x07, 0x05, 0x03, 0x02, 0x01 }, /* 133Mhz */
160 static u16 dma_table[3] = { 0x2208, 0x10C2, 0x10C1 };
162 struct pci_dev *pdev = to_pci_dev(ap->host->dev);
163 unsigned long ma = sil680_seldev(ap, adev, 0x08);
164 unsigned long ua = sil680_seldev(ap, adev, 0x0C);
165 unsigned long addr_mask = 0x80 + 4 * ap->port_no;
166 int port_shift = adev->devno * 4;
170 pci_read_config_byte(pdev, 0x8A, &scsc);
171 pci_read_config_byte(pdev, addr_mask, &mode);
172 pci_read_config_word(pdev, ma, &multi);
173 pci_read_config_word(pdev, ua, &ultra);
175 /* Mask timing bits */
177 mode &= ~(0x03 << port_shift);
180 scsc = (scsc & 0x30) ? 1: 0;
182 if (adev->dma_mode >= XFER_UDMA_0) {
184 ultra |= ultra_table[scsc][adev->dma_mode - XFER_UDMA_0];
185 mode |= (0x03 << port_shift);
187 multi = dma_table[adev->dma_mode - XFER_MW_DMA_0];
188 mode |= (0x02 << port_shift);
190 pci_write_config_byte(pdev, addr_mask, mode);
191 pci_write_config_word(pdev, ma, multi);
192 pci_write_config_word(pdev, ua, ultra);
196 * sil680_sff_exec_command - issue ATA command to host controller
197 * @ap: port to which command is being issued
198 * @tf: ATA taskfile register set
200 * Issues ATA command, with proper synchronization with interrupt
201 * handler / other threads. Use our MMIO space for PCI posting to avoid
202 * a hideously slow cycle all the way to the device.
205 * spin_lock_irqsave(host lock)
207 static void sil680_sff_exec_command(struct ata_port *ap,
208 const struct ata_taskfile *tf)
210 DPRINTK("ata%u: cmd 0x%X\n", ap->print_id, tf->command);
211 iowrite8(tf->command, ap->ioaddr.command_addr);
212 ioread8(ap->ioaddr.bmdma_addr + ATA_DMA_CMD);
215 static bool sil680_sff_irq_check(struct ata_port *ap)
217 struct pci_dev *pdev = to_pci_dev(ap->host->dev);
218 unsigned long addr = sil680_selreg(ap, 1);
221 pci_read_config_byte(pdev, addr, &val);
226 static struct scsi_host_template sil680_sht = {
227 ATA_BMDMA_SHT(DRV_NAME),
231 static struct ata_port_operations sil680_port_ops = {
232 .inherits = &ata_bmdma32_port_ops,
233 .sff_exec_command = sil680_sff_exec_command,
234 .sff_irq_check = sil680_sff_irq_check,
235 .cable_detect = sil680_cable_detect,
236 .set_piomode = sil680_set_piomode,
237 .set_dmamode = sil680_set_dmamode,
241 * sil680_init_chip - chip setup
244 * Perform all the chip setup which must be done both when the device
245 * is powered up on boot and when we resume in case we resumed from RAM.
246 * Returns the final clock settings.
249 static u8 sil680_init_chip(struct pci_dev *pdev, int *try_mmio)
253 /* FIXME: double check */
254 pci_write_config_byte(pdev, PCI_CACHE_LINE_SIZE,
255 pdev->revision ? 1 : 255);
257 pci_write_config_byte(pdev, 0x80, 0x00);
258 pci_write_config_byte(pdev, 0x84, 0x00);
260 pci_read_config_byte(pdev, 0x8A, &tmpbyte);
262 dev_dbg(&pdev->dev, "sil680: BA5_EN = %d clock = %02X\n",
263 tmpbyte & 1, tmpbyte & 0x30);
267 if (machine_is(cell))
268 *try_mmio = (tmpbyte & 1) || pci_resource_start(pdev, 5);
271 switch(tmpbyte & 0x30) {
273 /* 133 clock attempt to force it on */
274 pci_write_config_byte(pdev, 0x8A, tmpbyte|0x10);
277 /* if clocking is disabled */
278 /* 133 clock attempt to force it on */
279 pci_write_config_byte(pdev, 0x8A, tmpbyte & ~0x20);
285 /* BIOS set PCI x2 clocking */
289 pci_read_config_byte(pdev, 0x8A, &tmpbyte);
290 dev_dbg(&pdev->dev, "sil680: BA5_EN = %d clock = %02X\n",
291 tmpbyte & 1, tmpbyte & 0x30);
293 pci_write_config_byte(pdev, 0xA1, 0x72);
294 pci_write_config_word(pdev, 0xA2, 0x328A);
295 pci_write_config_dword(pdev, 0xA4, 0x62DD62DD);
296 pci_write_config_dword(pdev, 0xA8, 0x43924392);
297 pci_write_config_dword(pdev, 0xAC, 0x40094009);
298 pci_write_config_byte(pdev, 0xB1, 0x72);
299 pci_write_config_word(pdev, 0xB2, 0x328A);
300 pci_write_config_dword(pdev, 0xB4, 0x62DD62DD);
301 pci_write_config_dword(pdev, 0xB8, 0x43924392);
302 pci_write_config_dword(pdev, 0xBC, 0x40094009);
304 switch(tmpbyte & 0x30) {
305 case 0x00: printk(KERN_INFO "sil680: 100MHz clock.\n");break;
306 case 0x10: printk(KERN_INFO "sil680: 133MHz clock.\n");break;
307 case 0x20: printk(KERN_INFO "sil680: Using PCI clock.\n");break;
308 /* This last case is _NOT_ ok */
309 case 0x30: printk(KERN_ERR "sil680: Clock disabled ?\n");
311 return tmpbyte & 0x30;
314 static int __devinit sil680_init_one(struct pci_dev *pdev,
315 const struct pci_device_id *id)
317 static const struct ata_port_info info = {
318 .flags = ATA_FLAG_SLAVE_POSS,
319 .pio_mask = ATA_PIO4,
320 .mwdma_mask = ATA_MWDMA2,
321 .udma_mask = ATA_UDMA6,
322 .port_ops = &sil680_port_ops
324 static const struct ata_port_info info_slow = {
325 .flags = ATA_FLAG_SLAVE_POSS,
326 .pio_mask = ATA_PIO4,
327 .mwdma_mask = ATA_MWDMA2,
328 .udma_mask = ATA_UDMA5,
329 .port_ops = &sil680_port_ops
331 const struct ata_port_info *ppi[] = { &info, NULL };
332 struct ata_host *host;
333 void __iomem *mmio_base;
336 ata_print_version_once(&pdev->dev, DRV_VERSION);
338 rc = pcim_enable_device(pdev);
342 switch (sil680_init_chip(pdev, &try_mmio)) {
353 /* Try to acquire MMIO resources and fallback to PIO if
356 rc = pcim_iomap_regions(pdev, 1 << SIL680_MMIO_BAR, DRV_NAME);
360 /* Allocate host and set it up */
361 host = ata_host_alloc_pinfo(&pdev->dev, ppi, 2);
364 host->iomap = pcim_iomap_table(pdev);
366 /* Setup DMA masks */
367 rc = pci_set_dma_mask(pdev, ATA_DMA_MASK);
370 rc = pci_set_consistent_dma_mask(pdev, ATA_DMA_MASK);
373 pci_set_master(pdev);
375 /* Get MMIO base and initialize port addresses */
376 mmio_base = host->iomap[SIL680_MMIO_BAR];
377 host->ports[0]->ioaddr.bmdma_addr = mmio_base + 0x00;
378 host->ports[0]->ioaddr.cmd_addr = mmio_base + 0x80;
379 host->ports[0]->ioaddr.ctl_addr = mmio_base + 0x8a;
380 host->ports[0]->ioaddr.altstatus_addr = mmio_base + 0x8a;
381 ata_sff_std_ports(&host->ports[0]->ioaddr);
382 host->ports[1]->ioaddr.bmdma_addr = mmio_base + 0x08;
383 host->ports[1]->ioaddr.cmd_addr = mmio_base + 0xc0;
384 host->ports[1]->ioaddr.ctl_addr = mmio_base + 0xca;
385 host->ports[1]->ioaddr.altstatus_addr = mmio_base + 0xca;
386 ata_sff_std_ports(&host->ports[1]->ioaddr);
388 /* Register & activate */
389 return ata_host_activate(host, pdev->irq, ata_bmdma_interrupt,
390 IRQF_SHARED, &sil680_sht);
393 return ata_pci_bmdma_init_one(pdev, ppi, &sil680_sht, NULL, 0);
397 static int sil680_reinit_one(struct pci_dev *pdev)
399 struct ata_host *host = dev_get_drvdata(&pdev->dev);
402 rc = ata_pci_device_do_resume(pdev);
405 sil680_init_chip(pdev, &try_mmio);
406 ata_host_resume(host);
411 static const struct pci_device_id sil680[] = {
412 { PCI_VDEVICE(CMD, PCI_DEVICE_ID_SII_680), },
417 static struct pci_driver sil680_pci_driver = {
420 .probe = sil680_init_one,
421 .remove = ata_pci_remove_one,
423 .suspend = ata_pci_device_suspend,
424 .resume = sil680_reinit_one,
428 static int __init sil680_init(void)
430 return pci_register_driver(&sil680_pci_driver);
433 static void __exit sil680_exit(void)
435 pci_unregister_driver(&sil680_pci_driver);
438 MODULE_AUTHOR("Alan Cox");
439 MODULE_DESCRIPTION("low-level driver for SI680 PATA");
440 MODULE_LICENSE("GPL");
441 MODULE_DEVICE_TABLE(pci, sil680);
442 MODULE_VERSION(DRV_VERSION);
444 module_init(sil680_init);
445 module_exit(sil680_exit);