2 * pata-cs5530.c - CS5530 PATA for new ATA layer
4 * Alan Cox <alan@redhat.com>
6 * based upon cs5530.c by Mark Lord.
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License version 2 as
10 * published by the Free Software Foundation.
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, write to the Free Software
19 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
21 * Loosely based on the piix & svwks drivers.
24 * Available from AMD web site.
27 #include <linux/kernel.h>
28 #include <linux/module.h>
29 #include <linux/pci.h>
30 #include <linux/init.h>
31 #include <linux/blkdev.h>
32 #include <linux/delay.h>
33 #include <scsi/scsi_host.h>
34 #include <linux/libata.h>
35 #include <linux/dmi.h>
37 #define DRV_NAME "pata_cs5530"
38 #define DRV_VERSION "0.7.4"
40 static void __iomem
*cs5530_port_base(struct ata_port
*ap
)
42 unsigned long bmdma
= (unsigned long)ap
->ioaddr
.bmdma_addr
;
44 return (void __iomem
*)((bmdma
& ~0x0F) + 0x20 + 0x10 * ap
->port_no
);
48 * cs5530_set_piomode - PIO setup
50 * @adev: device on the interface
52 * Set our PIO requirements. This is fairly simple on the CS5530
56 static void cs5530_set_piomode(struct ata_port
*ap
, struct ata_device
*adev
)
58 static const unsigned int cs5530_pio_timings
[2][5] = {
59 {0x00009172, 0x00012171, 0x00020080, 0x00032010, 0x00040010},
60 {0xd1329172, 0x71212171, 0x30200080, 0x20102010, 0x00100010}
62 void __iomem
*base
= cs5530_port_base(ap
);
66 /* Find out which table to use */
67 tuning
= ioread32(base
+ 0x04);
68 format
= (tuning
& 0x80000000UL
) ? 1 : 0;
70 /* Now load the right timing register */
74 iowrite32(cs5530_pio_timings
[format
][adev
->pio_mode
- XFER_PIO_0
], base
);
78 * cs5530_set_dmamode - DMA timing setup
80 * @adev: Device being configured
82 * We cannot mix MWDMA and UDMA without reloading timings each switch
83 * master to slave. We track the last DMA setup in order to minimise
87 static void cs5530_set_dmamode(struct ata_port
*ap
, struct ata_device
*adev
)
89 void __iomem
*base
= cs5530_port_base(ap
);
90 u32 tuning
, timing
= 0;
93 /* Find out which table to use */
94 tuning
= ioread32(base
+ 0x04);
96 switch(adev
->dma_mode
) {
98 timing
= 0x00921250;break;
100 timing
= 0x00911140;break;
102 timing
= 0x00911030;break;
104 timing
= 0x00077771;break;
106 timing
= 0x00012121;break;
108 timing
= 0x00002020;break;
112 /* Merge in the PIO format bit */
113 timing
|= (tuning
& 0x80000000UL
);
114 if (adev
->devno
== 0) /* Master */
115 iowrite32(timing
, base
+ 0x04);
117 if (timing
& 0x00100000)
118 tuning
|= 0x00100000; /* UDMA for both */
120 tuning
&= ~0x00100000; /* MWDMA for both */
121 iowrite32(tuning
, base
+ 0x04);
122 iowrite32(timing
, base
+ 0x0C);
125 /* Set the DMA capable bit in the BMDMA area */
126 reg
= ioread8(ap
->ioaddr
.bmdma_addr
+ ATA_DMA_STATUS
);
127 reg
|= (1 << (5 + adev
->devno
));
128 iowrite8(reg
, ap
->ioaddr
.bmdma_addr
+ ATA_DMA_STATUS
);
130 /* Remember the last DMA setup we did */
132 ap
->private_data
= adev
;
136 * cs5530_qc_issue_prot - command issue
137 * @qc: command pending
139 * Called when the libata layer is about to issue a command. We wrap
140 * this interface so that we can load the correct ATA timings if
141 * necessary. Specifically we have a problem that there is only
142 * one MWDMA/UDMA bit.
145 static unsigned int cs5530_qc_issue_prot(struct ata_queued_cmd
*qc
)
147 struct ata_port
*ap
= qc
->ap
;
148 struct ata_device
*adev
= qc
->dev
;
149 struct ata_device
*prev
= ap
->private_data
;
151 /* See if the DMA settings could be wrong */
152 if (adev
->dma_mode
!= 0 && adev
!= prev
&& prev
!= NULL
) {
153 /* Maybe, but do the channels match MWDMA/UDMA ? */
154 if ((adev
->dma_mode
>= XFER_UDMA_0
&& prev
->dma_mode
< XFER_UDMA_0
) ||
155 (adev
->dma_mode
< XFER_UDMA_0
&& prev
->dma_mode
>= XFER_UDMA_0
))
156 /* Switch the mode bits */
157 cs5530_set_dmamode(ap
, adev
);
160 return ata_qc_issue_prot(qc
);
163 static struct scsi_host_template cs5530_sht
= {
164 ATA_BMDMA_SHT(DRV_NAME
),
165 .sg_tablesize
= LIBATA_DUMB_MAX_PRD
,
168 static struct ata_port_operations cs5530_port_ops
= {
169 .inherits
= &ata_bmdma_port_ops
,
171 .qc_prep
= ata_dumb_qc_prep
,
172 .qc_issue
= cs5530_qc_issue_prot
,
174 .cable_detect
= ata_cable_40wire
,
175 .set_piomode
= cs5530_set_piomode
,
176 .set_dmamode
= cs5530_set_dmamode
,
179 static const struct dmi_system_id palmax_dmi_table
[] = {
181 .ident
= "Palmax PD1100",
183 DMI_MATCH(DMI_SYS_VENDOR
, "Cyrix"),
184 DMI_MATCH(DMI_PRODUCT_NAME
, "Caddis"),
190 static int cs5530_is_palmax(void)
192 if (dmi_check_system(palmax_dmi_table
)) {
193 printk(KERN_INFO
"Palmax PD1100: Disabling DMA on docking port.\n");
201 * cs5530_init_chip - Chipset init
203 * Perform the chip initialisation work that is shared between both
204 * setup and resume paths
207 static int cs5530_init_chip(void)
209 struct pci_dev
*master_0
= NULL
, *cs5530_0
= NULL
, *dev
= NULL
;
211 while ((dev
= pci_get_device(PCI_VENDOR_ID_CYRIX
, PCI_ANY_ID
, dev
)) != NULL
) {
212 switch (dev
->device
) {
213 case PCI_DEVICE_ID_CYRIX_PCI_MASTER
:
214 master_0
= pci_dev_get(dev
);
216 case PCI_DEVICE_ID_CYRIX_5530_LEGACY
:
217 cs5530_0
= pci_dev_get(dev
);
222 printk(KERN_ERR DRV_NAME
": unable to locate PCI MASTER function\n");
226 printk(KERN_ERR DRV_NAME
": unable to locate CS5530 LEGACY function\n");
230 pci_set_master(cs5530_0
);
231 pci_try_set_mwi(cs5530_0
);
234 * Set PCI CacheLineSize to 16-bytes:
235 * --> Write 0x04 into 8-bit PCI CACHELINESIZE reg of function 0 of the cs5530
237 * Note: This value is constant because the 5530 is only a Geode companion
240 pci_write_config_byte(cs5530_0
, PCI_CACHE_LINE_SIZE
, 0x04);
243 * Disable trapping of UDMA register accesses (Win98 hack):
244 * --> Write 0x5006 into 16-bit reg at offset 0xd0 of function 0 of the cs5530
247 pci_write_config_word(cs5530_0
, 0xd0, 0x5006);
250 * Bit-1 at 0x40 enables MemoryWriteAndInvalidate on internal X-bus:
251 * The other settings are what is necessary to get the register
252 * into a sane state for IDE DMA operation.
255 pci_write_config_byte(master_0
, 0x40, 0x1e);
258 * Set max PCI burst size (16-bytes seems to work best):
259 * 16bytes: set bit-1 at 0x41 (reg value of 0x16)
260 * all others: clear bit-1 at 0x41, and do:
261 * 128bytes: OR 0x00 at 0x41
262 * 256bytes: OR 0x04 at 0x41
263 * 512bytes: OR 0x08 at 0x41
264 * 1024bytes: OR 0x0c at 0x41
267 pci_write_config_byte(master_0
, 0x41, 0x14);
270 * These settings are necessary to get the chip
271 * into a sane state for IDE DMA operation.
274 pci_write_config_byte(master_0
, 0x42, 0x00);
275 pci_write_config_byte(master_0
, 0x43, 0xc1);
277 pci_dev_put(master_0
);
278 pci_dev_put(cs5530_0
);
282 pci_dev_put(master_0
);
284 pci_dev_put(cs5530_0
);
289 * cs5530_init_one - Initialise a CS5530
291 * @id: Entry in match table
293 * Install a driver for the newly found CS5530 companion chip. Most of
294 * this is just housekeeping. We have to set the chip up correctly and
295 * turn off various bits of emulation magic.
298 static int cs5530_init_one(struct pci_dev
*pdev
, const struct pci_device_id
*id
)
300 static const struct ata_port_info info
= {
301 .flags
= ATA_FLAG_SLAVE_POSS
,
305 .port_ops
= &cs5530_port_ops
307 /* The docking connector doesn't do UDMA, and it seems not MWDMA */
308 static const struct ata_port_info info_palmax_secondary
= {
309 .flags
= ATA_FLAG_SLAVE_POSS
,
311 .port_ops
= &cs5530_port_ops
313 const struct ata_port_info
*ppi
[] = { &info
, NULL
};
316 rc
= pcim_enable_device(pdev
);
320 /* Chip initialisation */
321 if (cs5530_init_chip())
324 if (cs5530_is_palmax())
325 ppi
[1] = &info_palmax_secondary
;
327 /* Now kick off ATA set up */
328 return ata_pci_init_one(pdev
, ppi
, &cs5530_sht
, NULL
);
332 static int cs5530_reinit_one(struct pci_dev
*pdev
)
334 struct ata_host
*host
= dev_get_drvdata(&pdev
->dev
);
337 rc
= ata_pci_device_do_resume(pdev
);
341 /* If we fail on resume we are doomed */
342 if (cs5530_init_chip())
345 ata_host_resume(host
);
348 #endif /* CONFIG_PM */
350 static const struct pci_device_id cs5530
[] = {
351 { PCI_VDEVICE(CYRIX
, PCI_DEVICE_ID_CYRIX_5530_IDE
), },
356 static struct pci_driver cs5530_pci_driver
= {
359 .probe
= cs5530_init_one
,
360 .remove
= ata_pci_remove_one
,
362 .suspend
= ata_pci_device_suspend
,
363 .resume
= cs5530_reinit_one
,
367 static int __init
cs5530_init(void)
369 return pci_register_driver(&cs5530_pci_driver
);
372 static void __exit
cs5530_exit(void)
374 pci_unregister_driver(&cs5530_pci_driver
);
377 MODULE_AUTHOR("Alan Cox");
378 MODULE_DESCRIPTION("low-level driver for the Cyrix/NS/AMD 5530");
379 MODULE_LICENSE("GPL");
380 MODULE_DEVICE_TABLE(pci
, cs5530
);
381 MODULE_VERSION(DRV_VERSION
);
383 module_init(cs5530_init
);
384 module_exit(cs5530_exit
);