2 * sata_vsc.c - Vitesse VSC7174 4 port DPA SATA
4 * Maintained by: Jeremy Higdon @ SGI
5 * Please ALWAYS copy linux-ide@vger.kernel.org
10 * Bits from Jeff Garzik, Copyright RedHat, Inc.
13 * This program is free software; you can redistribute it and/or modify
14 * it under the terms of the GNU General Public License as published by
15 * the Free Software Foundation; either version 2, or (at your option)
18 * This program is distributed in the hope that it will be useful,
19 * but WITHOUT ANY WARRANTY; without even the implied warranty of
20 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
21 * GNU General Public License for more details.
23 * You should have received a copy of the GNU General Public License
24 * along with this program; see the file COPYING. If not, write to
25 * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
28 * libata documentation is available via 'make {ps|pdf}docs',
29 * as Documentation/DocBook/libata.*
31 * Vitesse hardware documentation presumably available under NDA.
32 * Intel 31244 (same hardware interface) documentation presumably
33 * available from http://developer.intel.com/
37 #include <linux/kernel.h>
38 #include <linux/module.h>
39 #include <linux/pci.h>
40 #include <linux/init.h>
41 #include <linux/blkdev.h>
42 #include <linux/delay.h>
43 #include <linux/interrupt.h>
44 #include <linux/dma-mapping.h>
46 #include <scsi/scsi_host.h>
47 #include <linux/libata.h>
49 #define DRV_NAME "sata_vsc"
50 #define DRV_VERSION "1.0"
52 /* Interrupt register offsets (from chip base address) */
53 #define VSC_SATA_INT_STAT_OFFSET 0x00
54 #define VSC_SATA_INT_MASK_OFFSET 0x04
56 /* Taskfile registers offsets */
57 #define VSC_SATA_TF_CMD_OFFSET 0x00
58 #define VSC_SATA_TF_DATA_OFFSET 0x00
59 #define VSC_SATA_TF_ERROR_OFFSET 0x04
60 #define VSC_SATA_TF_FEATURE_OFFSET 0x06
61 #define VSC_SATA_TF_NSECT_OFFSET 0x08
62 #define VSC_SATA_TF_LBAL_OFFSET 0x0c
63 #define VSC_SATA_TF_LBAM_OFFSET 0x10
64 #define VSC_SATA_TF_LBAH_OFFSET 0x14
65 #define VSC_SATA_TF_DEVICE_OFFSET 0x18
66 #define VSC_SATA_TF_STATUS_OFFSET 0x1c
67 #define VSC_SATA_TF_COMMAND_OFFSET 0x1d
68 #define VSC_SATA_TF_ALTSTATUS_OFFSET 0x28
69 #define VSC_SATA_TF_CTL_OFFSET 0x29
72 #define VSC_SATA_UP_DESCRIPTOR_OFFSET 0x64
73 #define VSC_SATA_UP_DATA_BUFFER_OFFSET 0x6C
74 #define VSC_SATA_DMA_CMD_OFFSET 0x70
77 #define VSC_SATA_SCR_STATUS_OFFSET 0x100
78 #define VSC_SATA_SCR_ERROR_OFFSET 0x104
79 #define VSC_SATA_SCR_CONTROL_OFFSET 0x108
82 #define VSC_SATA_PORT_OFFSET 0x200
85 static u32 vsc_sata_scr_read (struct ata_port *ap, unsigned int sc_reg)
87 if (sc_reg > SCR_CONTROL)
89 return readl((void *) ap->ioaddr.scr_addr + (sc_reg * 4));
93 static void vsc_sata_scr_write (struct ata_port *ap, unsigned int sc_reg,
96 if (sc_reg > SCR_CONTROL)
98 writel(val, (void *) ap->ioaddr.scr_addr + (sc_reg * 4));
102 static void vsc_intr_mask_update(struct ata_port *ap, u8 ctl)
104 unsigned long mask_addr;
107 mask_addr = (unsigned long) ap->host_set->mmio_base +
108 VSC_SATA_INT_MASK_OFFSET + ap->port_no;
109 mask = readb(mask_addr);
114 writeb(mask, mask_addr);
118 static void vsc_sata_tf_load(struct ata_port *ap, struct ata_taskfile *tf)
120 struct ata_ioports *ioaddr = &ap->ioaddr;
121 unsigned int is_addr = tf->flags & ATA_TFLAG_ISADDR;
124 * The only thing the ctl register is used for is SRST.
125 * That is not enabled or disabled via tf_load.
126 * However, if ATA_NIEN is changed, then we need to change the interrupt register.
128 if ((tf->ctl & ATA_NIEN) != (ap->last_ctl & ATA_NIEN)) {
129 ap->last_ctl = tf->ctl;
130 vsc_intr_mask_update(ap, tf->ctl & ATA_NIEN);
132 if (is_addr && (tf->flags & ATA_TFLAG_LBA48)) {
133 writew(tf->feature | (((u16)tf->hob_feature) << 8), ioaddr->feature_addr);
134 writew(tf->nsect | (((u16)tf->hob_nsect) << 8), ioaddr->nsect_addr);
135 writew(tf->lbal | (((u16)tf->hob_lbal) << 8), ioaddr->lbal_addr);
136 writew(tf->lbam | (((u16)tf->hob_lbam) << 8), ioaddr->lbam_addr);
137 writew(tf->lbah | (((u16)tf->hob_lbah) << 8), ioaddr->lbah_addr);
138 } else if (is_addr) {
139 writew(tf->feature, ioaddr->feature_addr);
140 writew(tf->nsect, ioaddr->nsect_addr);
141 writew(tf->lbal, ioaddr->lbal_addr);
142 writew(tf->lbam, ioaddr->lbam_addr);
143 writew(tf->lbah, ioaddr->lbah_addr);
146 if (tf->flags & ATA_TFLAG_DEVICE)
147 writeb(tf->device, ioaddr->device_addr);
153 static void vsc_sata_tf_read(struct ata_port *ap, struct ata_taskfile *tf)
155 struct ata_ioports *ioaddr = &ap->ioaddr;
156 u16 nsect, lbal, lbam, lbah;
158 nsect = tf->nsect = readw(ioaddr->nsect_addr);
159 lbal = tf->lbal = readw(ioaddr->lbal_addr);
160 lbam = tf->lbam = readw(ioaddr->lbam_addr);
161 lbah = tf->lbah = readw(ioaddr->lbah_addr);
162 tf->device = readw(ioaddr->device_addr);
164 if (tf->flags & ATA_TFLAG_LBA48) {
165 tf->hob_feature = readb(ioaddr->error_addr);
166 tf->hob_nsect = nsect >> 8;
167 tf->hob_lbal = lbal >> 8;
168 tf->hob_lbam = lbam >> 8;
169 tf->hob_lbah = lbah >> 8;
177 * Read the interrupt register and process for the devices that have them pending.
179 static irqreturn_t vsc_sata_interrupt (int irq, void *dev_instance,
180 struct pt_regs *regs)
182 struct ata_host_set *host_set = dev_instance;
184 unsigned int handled = 0;
187 spin_lock(&host_set->lock);
189 int_status = readl(host_set->mmio_base + VSC_SATA_INT_STAT_OFFSET);
191 for (i = 0; i < host_set->n_ports; i++) {
192 if (int_status & ((u32) 0xFF << (8 * i))) {
195 ap = host_set->ports[i];
196 if (ap && !(ap->flags &
197 (ATA_FLAG_PORT_DISABLED|ATA_FLAG_NOINTR))) {
198 struct ata_queued_cmd *qc;
200 qc = ata_qc_from_tag(ap, ap->active_tag);
201 if (qc && (!(qc->tf.ctl & ATA_NIEN)))
202 handled += ata_host_intr(ap, qc);
207 spin_unlock(&host_set->lock);
209 return IRQ_RETVAL(handled);
213 static Scsi_Host_Template vsc_sata_sht = {
214 .module = THIS_MODULE,
216 .ioctl = ata_scsi_ioctl,
217 .queuecommand = ata_scsi_queuecmd,
218 .eh_strategy_handler = ata_scsi_error,
219 .can_queue = ATA_DEF_QUEUE,
220 .this_id = ATA_SHT_THIS_ID,
221 .sg_tablesize = LIBATA_MAX_PRD,
222 .max_sectors = ATA_MAX_SECTORS,
223 .cmd_per_lun = ATA_SHT_CMD_PER_LUN,
224 .emulated = ATA_SHT_EMULATED,
225 .use_clustering = ATA_SHT_USE_CLUSTERING,
226 .proc_name = DRV_NAME,
227 .dma_boundary = ATA_DMA_BOUNDARY,
228 .slave_configure = ata_scsi_slave_config,
229 .bios_param = ata_std_bios_param,
234 static struct ata_port_operations vsc_sata_ops = {
235 .port_disable = ata_port_disable,
236 .tf_load = vsc_sata_tf_load,
237 .tf_read = vsc_sata_tf_read,
238 .exec_command = ata_exec_command,
239 .check_status = ata_check_status,
240 .dev_select = ata_std_dev_select,
241 .phy_reset = sata_phy_reset,
242 .bmdma_setup = ata_bmdma_setup,
243 .bmdma_start = ata_bmdma_start,
244 .bmdma_stop = ata_bmdma_stop,
245 .bmdma_status = ata_bmdma_status,
246 .qc_prep = ata_qc_prep,
247 .qc_issue = ata_qc_issue_prot,
248 .eng_timeout = ata_eng_timeout,
249 .irq_handler = vsc_sata_interrupt,
250 .irq_clear = ata_bmdma_irq_clear,
251 .scr_read = vsc_sata_scr_read,
252 .scr_write = vsc_sata_scr_write,
253 .port_start = ata_port_start,
254 .port_stop = ata_port_stop,
255 .host_stop = ata_host_stop,
258 static void __devinit vsc_sata_setup_port(struct ata_ioports *port, unsigned long base)
260 port->cmd_addr = base + VSC_SATA_TF_CMD_OFFSET;
261 port->data_addr = base + VSC_SATA_TF_DATA_OFFSET;
262 port->error_addr = base + VSC_SATA_TF_ERROR_OFFSET;
263 port->feature_addr = base + VSC_SATA_TF_FEATURE_OFFSET;
264 port->nsect_addr = base + VSC_SATA_TF_NSECT_OFFSET;
265 port->lbal_addr = base + VSC_SATA_TF_LBAL_OFFSET;
266 port->lbam_addr = base + VSC_SATA_TF_LBAM_OFFSET;
267 port->lbah_addr = base + VSC_SATA_TF_LBAH_OFFSET;
268 port->device_addr = base + VSC_SATA_TF_DEVICE_OFFSET;
269 port->status_addr = base + VSC_SATA_TF_STATUS_OFFSET;
270 port->command_addr = base + VSC_SATA_TF_COMMAND_OFFSET;
271 port->altstatus_addr = base + VSC_SATA_TF_ALTSTATUS_OFFSET;
272 port->ctl_addr = base + VSC_SATA_TF_CTL_OFFSET;
273 port->bmdma_addr = base + VSC_SATA_DMA_CMD_OFFSET;
274 port->scr_addr = base + VSC_SATA_SCR_STATUS_OFFSET;
275 writel(0, base + VSC_SATA_UP_DESCRIPTOR_OFFSET);
276 writel(0, base + VSC_SATA_UP_DATA_BUFFER_OFFSET);
280 static int __devinit vsc_sata_init_one (struct pci_dev *pdev, const struct pci_device_id *ent)
282 static int printed_version;
283 struct ata_probe_ent *probe_ent = NULL;
285 int pci_dev_busy = 0;
289 if (!printed_version++)
290 printk(KERN_DEBUG DRV_NAME " version " DRV_VERSION "\n");
292 rc = pci_enable_device(pdev);
297 * Check if we have needed resource mapped.
299 if (pci_resource_len(pdev, 0) == 0) {
304 rc = pci_request_regions(pdev, DRV_NAME);
311 * Use 32 bit DMA mask, because 64 bit address support is poor.
313 rc = pci_set_dma_mask(pdev, DMA_32BIT_MASK);
315 goto err_out_regions;
316 rc = pci_set_consistent_dma_mask(pdev, DMA_32BIT_MASK);
318 goto err_out_regions;
320 probe_ent = kmalloc(sizeof(*probe_ent), GFP_KERNEL);
321 if (probe_ent == NULL) {
323 goto err_out_regions;
325 memset(probe_ent, 0, sizeof(*probe_ent));
326 probe_ent->dev = pci_dev_to_dev(pdev);
327 INIT_LIST_HEAD(&probe_ent->node);
329 mmio_base = ioremap(pci_resource_start(pdev, 0),
330 pci_resource_len(pdev, 0));
331 if (mmio_base == NULL) {
333 goto err_out_free_ent;
335 base = (unsigned long) mmio_base;
338 * Due to a bug in the chip, the default cache line size can't be used
340 pci_write_config_byte(pdev, PCI_CACHE_LINE_SIZE, 0x80);
342 probe_ent->sht = &vsc_sata_sht;
343 probe_ent->host_flags = ATA_FLAG_SATA | ATA_FLAG_NO_LEGACY |
344 ATA_FLAG_MMIO | ATA_FLAG_SATA_RESET;
345 probe_ent->port_ops = &vsc_sata_ops;
346 probe_ent->n_ports = 4;
347 probe_ent->irq = pdev->irq;
348 probe_ent->irq_flags = SA_SHIRQ;
349 probe_ent->mmio_base = mmio_base;
351 /* We don't care much about the PIO/UDMA masks, but the core won't like us
352 * if we don't fill these
354 probe_ent->pio_mask = 0x1f;
355 probe_ent->mwdma_mask = 0x07;
356 probe_ent->udma_mask = 0x7f;
358 /* We have 4 ports per PCI function */
359 vsc_sata_setup_port(&probe_ent->port[0], base + 1 * VSC_SATA_PORT_OFFSET);
360 vsc_sata_setup_port(&probe_ent->port[1], base + 2 * VSC_SATA_PORT_OFFSET);
361 vsc_sata_setup_port(&probe_ent->port[2], base + 3 * VSC_SATA_PORT_OFFSET);
362 vsc_sata_setup_port(&probe_ent->port[3], base + 4 * VSC_SATA_PORT_OFFSET);
364 pci_set_master(pdev);
367 * Config offset 0x98 is "Extended Control and Status Register 0"
368 * Default value is (1 << 28). All bits except bit 28 are reserved in
369 * DPA mode. If bit 28 is set, LED 0 reflects all ports' activity.
370 * If bit 28 is clear, each port has its own LED.
372 pci_write_config_dword(pdev, 0x98, 0);
374 /* FIXME: check ata_device_add return value */
375 ata_device_add(probe_ent);
383 pci_release_regions(pdev);
386 pci_disable_device(pdev);
392 * 0x1725/0x7174 is the Vitesse VSC-7174
393 * 0x8086/0x3200 is the Intel 31244, which is supposed to be identical
394 * compatibility is untested as of yet
396 static struct pci_device_id vsc_sata_pci_tbl[] = {
397 { 0x1725, 0x7174, PCI_ANY_ID, PCI_ANY_ID, 0x10600, 0xFFFFFF, 0 },
398 { 0x8086, 0x3200, PCI_ANY_ID, PCI_ANY_ID, 0x10600, 0xFFFFFF, 0 },
403 static struct pci_driver vsc_sata_pci_driver = {
405 .id_table = vsc_sata_pci_tbl,
406 .probe = vsc_sata_init_one,
407 .remove = ata_pci_remove_one,
411 static int __init vsc_sata_init(void)
413 return pci_module_init(&vsc_sata_pci_driver);
417 static void __exit vsc_sata_exit(void)
419 pci_unregister_driver(&vsc_sata_pci_driver);
423 MODULE_AUTHOR("Jeremy Higdon");
424 MODULE_DESCRIPTION("low-level driver for Vitesse VSC7174 SATA controller");
425 MODULE_LICENSE("GPL");
426 MODULE_DEVICE_TABLE(pci, vsc_sata_pci_tbl);
427 MODULE_VERSION(DRV_VERSION);
429 module_init(vsc_sata_init);
430 module_exit(vsc_sata_exit);