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/blkdev.h>
29 #include <linux/delay.h>
30 #include <scsi/scsi_host.h>
31 #include <linux/libata.h>
33 #define DRV_NAME "pata_sil680"
34 #define DRV_VERSION "0.4.9"
36 #define SIL680_MMIO_BAR 5
39 * sil680_selreg - return register base
43 * Turn a config register offset into the right address in PCI space
44 * to access the control register in question.
46 * Thankfully this is a configuration operation so isn't performance
50 static unsigned long sil680_selreg(struct ata_port *ap, int r)
52 unsigned long base = 0xA0 + r;
53 base += (ap->port_no << 4);
58 * sil680_seldev - return register base
62 * Turn a config register offset into the right address in PCI space
63 * to access the control register in question including accounting for
67 static unsigned long sil680_seldev(struct ata_port *ap, struct ata_device *adev, int r)
69 unsigned long base = 0xA0 + r;
70 base += (ap->port_no << 4);
71 base |= adev->devno ? 2 : 0;
77 * sil680_cable_detect - cable detection
80 * Perform cable detection. The SIL680 stores this in PCI config
84 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 const u16 speed_p[5] = {
109 0x328A, 0x2283, 0x1104, 0x10C3, 0x10C1
111 static const u16 speed_t[5] = {
112 0x328A, 0x2283, 0x1281, 0x10C3, 0x10C1
115 unsigned long tfaddr = sil680_selreg(ap, 0x02);
116 unsigned long addr = sil680_seldev(ap, adev, 0x04);
117 unsigned long addr_mask = 0x80 + 4 * ap->port_no;
118 struct pci_dev *pdev = to_pci_dev(ap->host->dev);
119 int pio = adev->pio_mode - XFER_PIO_0;
120 int lowest_pio = pio;
121 int port_shift = 4 * adev->devno;
125 struct ata_device *pair = ata_dev_pair(adev);
127 if (pair != NULL && adev->pio_mode > pair->pio_mode)
128 lowest_pio = pair->pio_mode - XFER_PIO_0;
130 pci_write_config_word(pdev, addr, speed_p[pio]);
131 pci_write_config_word(pdev, tfaddr, speed_t[lowest_pio]);
133 pci_read_config_word(pdev, tfaddr-2, ®);
134 pci_read_config_byte(pdev, addr_mask, &mode);
136 reg &= ~0x0200; /* Clear IORDY */
137 mode &= ~(3 << port_shift); /* Clear IORDY and DMA bits */
139 if (ata_pio_need_iordy(adev)) {
140 reg |= 0x0200; /* Enable IORDY */
141 mode |= 1 << port_shift;
143 pci_write_config_word(pdev, tfaddr-2, reg);
144 pci_write_config_byte(pdev, addr_mask, mode);
148 * sil680_set_dmamode - set DMA mode data
152 * Program the MWDMA/UDMA modes for the sil680 chipset.
154 * The MWDMA mode values are pulled from a lookup table
155 * while the chipset uses mode number for UDMA.
158 static void sil680_set_dmamode(struct ata_port *ap, struct ata_device *adev)
160 static const u8 ultra_table[2][7] = {
161 { 0x0C, 0x07, 0x05, 0x04, 0x02, 0x01, 0xFF }, /* 100MHz */
162 { 0x0F, 0x0B, 0x07, 0x05, 0x03, 0x02, 0x01 }, /* 133Mhz */
164 static const u16 dma_table[3] = { 0x2208, 0x10C2, 0x10C1 };
166 struct pci_dev *pdev = to_pci_dev(ap->host->dev);
167 unsigned long ma = sil680_seldev(ap, adev, 0x08);
168 unsigned long ua = sil680_seldev(ap, adev, 0x0C);
169 unsigned long addr_mask = 0x80 + 4 * ap->port_no;
170 int port_shift = adev->devno * 4;
174 pci_read_config_byte(pdev, 0x8A, &scsc);
175 pci_read_config_byte(pdev, addr_mask, &mode);
176 pci_read_config_word(pdev, ma, &multi);
177 pci_read_config_word(pdev, ua, &ultra);
179 /* Mask timing bits */
181 mode &= ~(0x03 << port_shift);
184 scsc = (scsc & 0x30) ? 1 : 0;
186 if (adev->dma_mode >= XFER_UDMA_0) {
188 ultra |= ultra_table[scsc][adev->dma_mode - XFER_UDMA_0];
189 mode |= (0x03 << port_shift);
191 multi = dma_table[adev->dma_mode - XFER_MW_DMA_0];
192 mode |= (0x02 << port_shift);
194 pci_write_config_byte(pdev, addr_mask, mode);
195 pci_write_config_word(pdev, ma, multi);
196 pci_write_config_word(pdev, ua, ultra);
200 * sil680_sff_exec_command - issue ATA command to host controller
201 * @ap: port to which command is being issued
202 * @tf: ATA taskfile register set
204 * Issues ATA command, with proper synchronization with interrupt
205 * handler / other threads. Use our MMIO space for PCI posting to avoid
206 * a hideously slow cycle all the way to the device.
209 * spin_lock_irqsave(host lock)
211 static void sil680_sff_exec_command(struct ata_port *ap,
212 const struct ata_taskfile *tf)
214 DPRINTK("ata%u: cmd 0x%X\n", ap->print_id, tf->command);
215 iowrite8(tf->command, ap->ioaddr.command_addr);
216 ioread8(ap->ioaddr.bmdma_addr + ATA_DMA_CMD);
219 static bool sil680_sff_irq_check(struct ata_port *ap)
221 struct pci_dev *pdev = to_pci_dev(ap->host->dev);
222 unsigned long addr = sil680_selreg(ap, 1);
225 pci_read_config_byte(pdev, addr, &val);
230 static struct scsi_host_template sil680_sht = {
231 ATA_BMDMA_SHT(DRV_NAME),
235 static struct ata_port_operations sil680_port_ops = {
236 .inherits = &ata_bmdma32_port_ops,
237 .sff_exec_command = sil680_sff_exec_command,
238 .sff_irq_check = sil680_sff_irq_check,
239 .cable_detect = sil680_cable_detect,
240 .set_piomode = sil680_set_piomode,
241 .set_dmamode = sil680_set_dmamode,
245 * sil680_init_chip - chip setup
248 * Perform all the chip setup which must be done both when the device
249 * is powered up on boot and when we resume in case we resumed from RAM.
250 * Returns the final clock settings.
253 static u8 sil680_init_chip(struct pci_dev *pdev, int *try_mmio)
257 /* FIXME: double check */
258 pci_write_config_byte(pdev, PCI_CACHE_LINE_SIZE,
259 pdev->revision ? 1 : 255);
261 pci_write_config_byte(pdev, 0x80, 0x00);
262 pci_write_config_byte(pdev, 0x84, 0x00);
264 pci_read_config_byte(pdev, 0x8A, &tmpbyte);
266 dev_dbg(&pdev->dev, "sil680: BA5_EN = %d clock = %02X\n",
267 tmpbyte & 1, tmpbyte & 0x30);
271 if (machine_is(cell))
272 *try_mmio = (tmpbyte & 1) || pci_resource_start(pdev, 5);
275 switch (tmpbyte & 0x30) {
277 /* 133 clock attempt to force it on */
278 pci_write_config_byte(pdev, 0x8A, tmpbyte|0x10);
281 /* if clocking is disabled */
282 /* 133 clock attempt to force it on */
283 pci_write_config_byte(pdev, 0x8A, tmpbyte & ~0x20);
289 /* BIOS set PCI x2 clocking */
293 pci_read_config_byte(pdev, 0x8A, &tmpbyte);
294 dev_dbg(&pdev->dev, "sil680: BA5_EN = %d clock = %02X\n",
295 tmpbyte & 1, tmpbyte & 0x30);
297 pci_write_config_byte(pdev, 0xA1, 0x72);
298 pci_write_config_word(pdev, 0xA2, 0x328A);
299 pci_write_config_dword(pdev, 0xA4, 0x62DD62DD);
300 pci_write_config_dword(pdev, 0xA8, 0x43924392);
301 pci_write_config_dword(pdev, 0xAC, 0x40094009);
302 pci_write_config_byte(pdev, 0xB1, 0x72);
303 pci_write_config_word(pdev, 0xB2, 0x328A);
304 pci_write_config_dword(pdev, 0xB4, 0x62DD62DD);
305 pci_write_config_dword(pdev, 0xB8, 0x43924392);
306 pci_write_config_dword(pdev, 0xBC, 0x40094009);
308 switch (tmpbyte & 0x30) {
310 printk(KERN_INFO "sil680: 100MHz clock.\n");
313 printk(KERN_INFO "sil680: 133MHz clock.\n");
316 printk(KERN_INFO "sil680: Using PCI clock.\n");
318 /* This last case is _NOT_ ok */
320 printk(KERN_ERR "sil680: Clock disabled ?\n");
322 return tmpbyte & 0x30;
325 static int sil680_init_one(struct pci_dev *pdev, const struct pci_device_id *id)
327 static const struct ata_port_info info = {
328 .flags = ATA_FLAG_SLAVE_POSS,
329 .pio_mask = ATA_PIO4,
330 .mwdma_mask = ATA_MWDMA2,
331 .udma_mask = ATA_UDMA6,
332 .port_ops = &sil680_port_ops
334 static const struct ata_port_info info_slow = {
335 .flags = ATA_FLAG_SLAVE_POSS,
336 .pio_mask = ATA_PIO4,
337 .mwdma_mask = ATA_MWDMA2,
338 .udma_mask = ATA_UDMA5,
339 .port_ops = &sil680_port_ops
341 const struct ata_port_info *ppi[] = { &info, NULL };
342 struct ata_host *host;
343 void __iomem *mmio_base;
346 ata_print_version_once(&pdev->dev, DRV_VERSION);
348 rc = pcim_enable_device(pdev);
352 switch (sil680_init_chip(pdev, &try_mmio)) {
363 /* Try to acquire MMIO resources and fallback to PIO if
366 rc = pcim_iomap_regions(pdev, 1 << SIL680_MMIO_BAR, DRV_NAME);
370 /* Allocate host and set it up */
371 host = ata_host_alloc_pinfo(&pdev->dev, ppi, 2);
374 host->iomap = pcim_iomap_table(pdev);
376 /* Setup DMA masks */
377 rc = dma_set_mask(&pdev->dev, ATA_DMA_MASK);
380 rc = dma_set_coherent_mask(&pdev->dev, ATA_DMA_MASK);
383 pci_set_master(pdev);
385 /* Get MMIO base and initialize port addresses */
386 mmio_base = host->iomap[SIL680_MMIO_BAR];
387 host->ports[0]->ioaddr.bmdma_addr = mmio_base + 0x00;
388 host->ports[0]->ioaddr.cmd_addr = mmio_base + 0x80;
389 host->ports[0]->ioaddr.ctl_addr = mmio_base + 0x8a;
390 host->ports[0]->ioaddr.altstatus_addr = mmio_base + 0x8a;
391 ata_sff_std_ports(&host->ports[0]->ioaddr);
392 host->ports[1]->ioaddr.bmdma_addr = mmio_base + 0x08;
393 host->ports[1]->ioaddr.cmd_addr = mmio_base + 0xc0;
394 host->ports[1]->ioaddr.ctl_addr = mmio_base + 0xca;
395 host->ports[1]->ioaddr.altstatus_addr = mmio_base + 0xca;
396 ata_sff_std_ports(&host->ports[1]->ioaddr);
398 /* Register & activate */
399 return ata_host_activate(host, pdev->irq, ata_bmdma_interrupt,
400 IRQF_SHARED, &sil680_sht);
403 return ata_pci_bmdma_init_one(pdev, ppi, &sil680_sht, NULL, 0);
406 #ifdef CONFIG_PM_SLEEP
407 static int sil680_reinit_one(struct pci_dev *pdev)
409 struct ata_host *host = pci_get_drvdata(pdev);
412 rc = ata_pci_device_do_resume(pdev);
415 sil680_init_chip(pdev, &try_mmio);
416 ata_host_resume(host);
421 static const struct pci_device_id sil680[] = {
422 { PCI_VDEVICE(CMD, PCI_DEVICE_ID_SII_680), },
427 static struct pci_driver sil680_pci_driver = {
430 .probe = sil680_init_one,
431 .remove = ata_pci_remove_one,
432 #ifdef CONFIG_PM_SLEEP
433 .suspend = ata_pci_device_suspend,
434 .resume = sil680_reinit_one,
438 module_pci_driver(sil680_pci_driver);
440 MODULE_AUTHOR("Alan Cox");
441 MODULE_DESCRIPTION("low-level driver for SI680 PATA");
442 MODULE_LICENSE("GPL");
443 MODULE_DEVICE_TABLE(pci, sil680);
444 MODULE_VERSION(DRV_VERSION);