2 * IDE tuning and bus mastering support for the CS5510/CS5520
5 * The CS5510/CS5520 are slightly unusual devices. Unlike the
6 * typical IDE controllers they do bus mastering with the drive in
7 * PIO mode and smarter silicon.
9 * The practical upshot of this is that we must always tune the
10 * drive for the right PIO mode. We must also ignore all the blacklists
11 * and the drive bus mastering DMA information. Also to confuse matters
12 * further we can do DMA on PIO only drives.
14 * DMA on the 5510 also requires we disable_hlt() during DMA on early
17 * *** This driver is strictly experimental ***
19 * (c) Copyright Red Hat Inc 2002
21 * This program is free software; you can redistribute it and/or modify it
22 * under the terms of the GNU General Public License as published by the
23 * Free Software Foundation; either version 2, or (at your option) any
26 * This program is distributed in the hope that it will be useful, but
27 * WITHOUT ANY WARRANTY; without even the implied warranty of
28 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
29 * General Public License for more details.
32 * Not publically available.
34 #include <linux/kernel.h>
35 #include <linux/module.h>
36 #include <linux/pci.h>
37 #include <linux/init.h>
38 #include <linux/blkdev.h>
39 #include <linux/delay.h>
40 #include <scsi/scsi_host.h>
41 #include <linux/libata.h>
43 #define DRV_NAME "pata_cs5520"
44 #define DRV_VERSION "0.6.4"
53 static const struct pio_clocks cs5520_pio_clocks
[]={
62 * cs5520_set_timings - program PIO timings
66 * Program the PIO mode timings for the controller according to the pio
70 static void cs5520_set_timings(struct ata_port
*ap
, struct ata_device
*adev
, int pio
)
72 struct pci_dev
*pdev
= to_pci_dev(ap
->host
->dev
);
73 int slave
= adev
->devno
;
77 /* Channel command timing */
78 pci_write_config_byte(pdev
, 0x62 + ap
->port_no
,
79 (cs5520_pio_clocks
[pio
].recovery
<< 4) |
80 (cs5520_pio_clocks
[pio
].assert));
81 /* FIXME: should these use address ? */
82 /* Read command timing */
83 pci_write_config_byte(pdev
, 0x64 + 4*ap
->port_no
+ slave
,
84 (cs5520_pio_clocks
[pio
].recovery
<< 4) |
85 (cs5520_pio_clocks
[pio
].assert));
86 /* Write command timing */
87 pci_write_config_byte(pdev
, 0x66 + 4*ap
->port_no
+ slave
,
88 (cs5520_pio_clocks
[pio
].recovery
<< 4) |
89 (cs5520_pio_clocks
[pio
].assert));
93 * cs5520_enable_dma - turn on DMA bits
95 * Turn on the DMA bits for this disk. Needed because the BIOS probably
96 * has not done the work for us. Belongs in the core SATA code.
99 static void cs5520_enable_dma(struct ata_port
*ap
, struct ata_device
*adev
)
101 /* Set the DMA enable/disable flag */
102 u8 reg
= ioread8(ap
->ioaddr
.bmdma_addr
+ 0x02);
103 reg
|= 1<<(adev
->devno
+ 5);
104 iowrite8(reg
, ap
->ioaddr
.bmdma_addr
+ 0x02);
108 * cs5520_set_dmamode - program DMA timings
112 * Program the DMA mode timings for the controller according to the pio
113 * clocking table. Note that this device sets the DMA timings to PIO
114 * mode values. This may seem bizarre but the 5520 architecture talks
115 * PIO mode to the disk and DMA mode to the controller so the underlying
116 * transfers are PIO timed.
119 static void cs5520_set_dmamode(struct ata_port
*ap
, struct ata_device
*adev
)
121 static const int dma_xlate
[3] = { XFER_PIO_0
, XFER_PIO_3
, XFER_PIO_4
};
122 cs5520_set_timings(ap
, adev
, dma_xlate
[adev
->dma_mode
]);
123 cs5520_enable_dma(ap
, adev
);
127 * cs5520_set_piomode - program PIO timings
131 * Program the PIO mode timings for the controller according to the pio
132 * clocking table. We know pio_mode will equal dma_mode because of the
133 * CS5520 architecture. At least once we turned DMA on and wrote a
137 static void cs5520_set_piomode(struct ata_port
*ap
, struct ata_device
*adev
)
139 cs5520_set_timings(ap
, adev
, adev
->pio_mode
);
142 static struct scsi_host_template cs5520_sht
= {
143 .module
= THIS_MODULE
,
145 .ioctl
= ata_scsi_ioctl
,
146 .queuecommand
= ata_scsi_queuecmd
,
147 .can_queue
= ATA_DEF_QUEUE
,
148 .this_id
= ATA_SHT_THIS_ID
,
149 .sg_tablesize
= LIBATA_MAX_PRD
,
150 .cmd_per_lun
= ATA_SHT_CMD_PER_LUN
,
151 .emulated
= ATA_SHT_EMULATED
,
152 .use_clustering
= ATA_SHT_USE_CLUSTERING
,
153 .proc_name
= DRV_NAME
,
154 .dma_boundary
= ATA_DMA_BOUNDARY
,
155 .slave_configure
= ata_scsi_slave_config
,
156 .slave_destroy
= ata_scsi_slave_destroy
,
157 .bios_param
= ata_std_bios_param
,
159 .resume
= ata_scsi_device_resume
,
160 .suspend
= ata_scsi_device_suspend
,
164 static struct ata_port_operations cs5520_port_ops
= {
165 .port_disable
= ata_port_disable
,
166 .set_piomode
= cs5520_set_piomode
,
167 .set_dmamode
= cs5520_set_dmamode
,
169 .tf_load
= ata_tf_load
,
170 .tf_read
= ata_tf_read
,
171 .check_status
= ata_check_status
,
172 .exec_command
= ata_exec_command
,
173 .dev_select
= ata_std_dev_select
,
175 .freeze
= ata_bmdma_freeze
,
176 .thaw
= ata_bmdma_thaw
,
177 .error_handler
= ata_bmdma_error_handler
,
178 .post_internal_cmd
= ata_bmdma_post_internal_cmd
,
179 .cable_detect
= ata_cable_40wire
,
181 .bmdma_setup
= ata_bmdma_setup
,
182 .bmdma_start
= ata_bmdma_start
,
183 .bmdma_stop
= ata_bmdma_stop
,
184 .bmdma_status
= ata_bmdma_status
,
185 .qc_prep
= ata_qc_prep
,
186 .qc_issue
= ata_qc_issue_prot
,
187 .data_xfer
= ata_data_xfer
,
189 .irq_handler
= ata_interrupt
,
190 .irq_clear
= ata_bmdma_irq_clear
,
191 .irq_on
= ata_irq_on
,
192 .irq_ack
= ata_irq_ack
,
194 .port_start
= ata_port_start
,
197 static int __devinit
cs5520_init_one(struct pci_dev
*dev
, const struct pci_device_id
*id
)
200 void __iomem
*iomap
[5];
201 static struct ata_probe_ent probe
[2];
204 /* IDE port enable bits */
205 pci_read_config_byte(dev
, 0x60, &pcicfg
);
207 /* Check if the ATA ports are enabled */
208 if ((pcicfg
& 3) == 0)
211 if ((pcicfg
& 0x40) == 0) {
212 printk(KERN_WARNING DRV_NAME
": DMA mode disabled. Enabling.\n");
213 pci_write_config_byte(dev
, 0x60, pcicfg
| 0x40);
216 /* Perform set up for DMA */
217 if (pci_enable_device_bars(dev
, 1<<2)) {
218 printk(KERN_ERR DRV_NAME
": unable to configure BAR2.\n");
222 if (pci_set_dma_mask(dev
, DMA_32BIT_MASK
)) {
223 printk(KERN_ERR DRV_NAME
": unable to configure DMA mask.\n");
226 if (pci_set_consistent_dma_mask(dev
, DMA_32BIT_MASK
)) {
227 printk(KERN_ERR DRV_NAME
": unable to configure consistent DMA mask.\n");
232 iomap
[0] = devm_ioport_map(&dev
->dev
, 0x1F0, 8);
233 iomap
[1] = devm_ioport_map(&dev
->dev
, 0x3F6, 1);
234 iomap
[2] = devm_ioport_map(&dev
->dev
, 0x170, 8);
235 iomap
[3] = devm_ioport_map(&dev
->dev
, 0x376, 1);
236 iomap
[4] = pcim_iomap(dev
, 2, 0);
238 if (!iomap
[0] || !iomap
[1] || !iomap
[2] || !iomap
[3] || !iomap
[4])
241 /* We have to do our own plumbing as the PCI setup for this
242 chipset is non-standard so we can't punt to the libata code */
244 INIT_LIST_HEAD(&probe
[0].node
);
245 probe
[0].dev
= pci_dev_to_dev(dev
);
246 probe
[0].port_ops
= &cs5520_port_ops
;
247 probe
[0].sht
= &cs5520_sht
;
248 probe
[0].pio_mask
= 0x1F;
249 probe
[0].mwdma_mask
= id
->driver_data
;
251 probe
[0].irq_flags
= 0;
252 probe
[0].port_flags
= ATA_FLAG_SLAVE_POSS
|ATA_FLAG_SRST
;
253 probe
[0].n_ports
= 1;
254 probe
[0].port
[0].cmd_addr
= iomap
[0];
255 probe
[0].port
[0].ctl_addr
= iomap
[1];
256 probe
[0].port
[0].altstatus_addr
= iomap
[1];
257 probe
[0].port
[0].bmdma_addr
= iomap
[4];
259 /* The secondary lurks at different addresses but is otherwise
263 INIT_LIST_HEAD(&probe
[1].node
);
265 probe
[1].port
[0].cmd_addr
= iomap
[2];
266 probe
[1].port
[0].ctl_addr
= iomap
[3];
267 probe
[1].port
[0].altstatus_addr
= iomap
[3];
268 probe
[1].port
[0].bmdma_addr
= iomap
[4] + 8;
270 /* Let libata fill in the port details */
271 ata_std_ports(&probe
[0].port
[0]);
272 ata_std_ports(&probe
[1].port
[0]);
274 /* Now add the ports that are active */
276 ports
+= ata_device_add(&probe
[0]);
278 ports
+= ata_device_add(&probe
[1]);
285 * cs5520_remove_one - device unload
286 * @pdev: PCI device being removed
288 * Handle an unplug/unload event for a PCI device. Unload the
289 * PCI driver but do not use the default handler as we manage
290 * resources ourself and *MUST NOT* disable the device as it has
294 static void __devexit
cs5520_remove_one(struct pci_dev
*pdev
)
296 struct device
*dev
= pci_dev_to_dev(pdev
);
297 struct ata_host
*host
= dev_get_drvdata(dev
);
299 ata_host_detach(host
);
304 * cs5520_reinit_one - device resume
307 * Do any reconfiguration work needed by a resume from RAM. We need
308 * to restore DMA mode support on BIOSen which disabled it
311 static int cs5520_reinit_one(struct pci_dev
*pdev
)
314 pci_read_config_byte(pdev
, 0x60, &pcicfg
);
315 if ((pcicfg
& 0x40) == 0)
316 pci_write_config_byte(pdev
, 0x60, pcicfg
| 0x40);
317 return ata_pci_device_resume(pdev
);
321 * cs5520_pci_device_suspend - device suspend
324 * We have to cut and waste bits from the standard method because
325 * the 5520 is a bit odd and not just a pure ATA device. As a result
326 * we must not disable it. The needed code is short and this avoids
327 * chip specific mess in the core code.
330 static int cs5520_pci_device_suspend(struct pci_dev
*pdev
, pm_message_t mesg
)
332 struct ata_host
*host
= dev_get_drvdata(&pdev
->dev
);
335 rc
= ata_host_suspend(host
, mesg
);
339 pci_save_state(pdev
);
342 #endif /* CONFIG_PM */
344 /* For now keep DMA off. We can set it for all but A rev CS5510 once the
345 core ATA code can handle it */
347 static const struct pci_device_id pata_cs5520
[] = {
348 { PCI_VDEVICE(CYRIX
, PCI_DEVICE_ID_CYRIX_5510
), },
349 { PCI_VDEVICE(CYRIX
, PCI_DEVICE_ID_CYRIX_5520
), },
354 static struct pci_driver cs5520_pci_driver
= {
356 .id_table
= pata_cs5520
,
357 .probe
= cs5520_init_one
,
358 .remove
= cs5520_remove_one
,
360 .suspend
= cs5520_pci_device_suspend
,
361 .resume
= cs5520_reinit_one
,
365 static int __init
cs5520_init(void)
367 return pci_register_driver(&cs5520_pci_driver
);
370 static void __exit
cs5520_exit(void)
372 pci_unregister_driver(&cs5520_pci_driver
);
375 MODULE_AUTHOR("Alan Cox");
376 MODULE_DESCRIPTION("low-level driver for Cyrix CS5510/5520");
377 MODULE_LICENSE("GPL");
378 MODULE_DEVICE_TABLE(pci
, pata_cs5520
);
379 MODULE_VERSION(DRV_VERSION
);
381 module_init(cs5520_init
);
382 module_exit(cs5520_exit
);