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.
12 * This file is subject to the terms and conditions of the GNU General Public
13 * License. See the file "COPYING" in the main directory of this archive
17 #include <linux/kernel.h>
18 #include <linux/module.h>
19 #include <linux/pci.h>
20 #include <linux/init.h>
21 #include <linux/blkdev.h>
22 #include <linux/delay.h>
23 #include <linux/interrupt.h>
24 #include <linux/dma-mapping.h>
26 #include <scsi/scsi_host.h>
27 #include <linux/libata.h>
29 #define DRV_NAME "sata_vsc"
30 #define DRV_VERSION "1.0"
32 /* Interrupt register offsets (from chip base address) */
33 #define VSC_SATA_INT_STAT_OFFSET 0x00
34 #define VSC_SATA_INT_MASK_OFFSET 0x04
36 /* Taskfile registers offsets */
37 #define VSC_SATA_TF_CMD_OFFSET 0x00
38 #define VSC_SATA_TF_DATA_OFFSET 0x00
39 #define VSC_SATA_TF_ERROR_OFFSET 0x04
40 #define VSC_SATA_TF_FEATURE_OFFSET 0x06
41 #define VSC_SATA_TF_NSECT_OFFSET 0x08
42 #define VSC_SATA_TF_LBAL_OFFSET 0x0c
43 #define VSC_SATA_TF_LBAM_OFFSET 0x10
44 #define VSC_SATA_TF_LBAH_OFFSET 0x14
45 #define VSC_SATA_TF_DEVICE_OFFSET 0x18
46 #define VSC_SATA_TF_STATUS_OFFSET 0x1c
47 #define VSC_SATA_TF_COMMAND_OFFSET 0x1d
48 #define VSC_SATA_TF_ALTSTATUS_OFFSET 0x28
49 #define VSC_SATA_TF_CTL_OFFSET 0x29
52 #define VSC_SATA_UP_DESCRIPTOR_OFFSET 0x64
53 #define VSC_SATA_UP_DATA_BUFFER_OFFSET 0x6C
54 #define VSC_SATA_DMA_CMD_OFFSET 0x70
57 #define VSC_SATA_SCR_STATUS_OFFSET 0x100
58 #define VSC_SATA_SCR_ERROR_OFFSET 0x104
59 #define VSC_SATA_SCR_CONTROL_OFFSET 0x108
62 #define VSC_SATA_PORT_OFFSET 0x200
65 static u32 vsc_sata_scr_read (struct ata_port *ap, unsigned int sc_reg)
67 if (sc_reg > SCR_CONTROL)
69 return readl((void *) ap->ioaddr.scr_addr + (sc_reg * 4));
73 static void vsc_sata_scr_write (struct ata_port *ap, unsigned int sc_reg,
76 if (sc_reg > SCR_CONTROL)
78 writel(val, (void *) ap->ioaddr.scr_addr + (sc_reg * 4));
82 static void vsc_intr_mask_update(struct ata_port *ap, u8 ctl)
84 unsigned long mask_addr;
87 mask_addr = (unsigned long) ap->host_set->mmio_base +
88 VSC_SATA_INT_MASK_OFFSET + ap->port_no;
89 mask = readb(mask_addr);
94 writeb(mask, mask_addr);
98 static void vsc_sata_tf_load(struct ata_port *ap, struct ata_taskfile *tf)
100 struct ata_ioports *ioaddr = &ap->ioaddr;
101 unsigned int is_addr = tf->flags & ATA_TFLAG_ISADDR;
104 * The only thing the ctl register is used for is SRST.
105 * That is not enabled or disabled via tf_load.
106 * However, if ATA_NIEN is changed, then we need to change the interrupt register.
108 if ((tf->ctl & ATA_NIEN) != (ap->last_ctl & ATA_NIEN)) {
109 ap->last_ctl = tf->ctl;
110 vsc_intr_mask_update(ap, tf->ctl & ATA_NIEN);
112 if (is_addr && (tf->flags & ATA_TFLAG_LBA48)) {
113 writew(tf->feature | (((u16)tf->hob_feature) << 8), ioaddr->feature_addr);
114 writew(tf->nsect | (((u16)tf->hob_nsect) << 8), ioaddr->nsect_addr);
115 writew(tf->lbal | (((u16)tf->hob_lbal) << 8), ioaddr->lbal_addr);
116 writew(tf->lbam | (((u16)tf->hob_lbam) << 8), ioaddr->lbam_addr);
117 writew(tf->lbah | (((u16)tf->hob_lbah) << 8), ioaddr->lbah_addr);
118 } else if (is_addr) {
119 writew(tf->feature, ioaddr->feature_addr);
120 writew(tf->nsect, ioaddr->nsect_addr);
121 writew(tf->lbal, ioaddr->lbal_addr);
122 writew(tf->lbam, ioaddr->lbam_addr);
123 writew(tf->lbah, ioaddr->lbah_addr);
126 if (tf->flags & ATA_TFLAG_DEVICE)
127 writeb(tf->device, ioaddr->device_addr);
133 static void vsc_sata_tf_read(struct ata_port *ap, struct ata_taskfile *tf)
135 struct ata_ioports *ioaddr = &ap->ioaddr;
136 u16 nsect, lbal, lbam, lbah;
138 nsect = tf->nsect = readw(ioaddr->nsect_addr);
139 lbal = tf->lbal = readw(ioaddr->lbal_addr);
140 lbam = tf->lbam = readw(ioaddr->lbam_addr);
141 lbah = tf->lbah = readw(ioaddr->lbah_addr);
142 tf->device = readw(ioaddr->device_addr);
144 if (tf->flags & ATA_TFLAG_LBA48) {
145 tf->hob_feature = readb(ioaddr->error_addr);
146 tf->hob_nsect = nsect >> 8;
147 tf->hob_lbal = lbal >> 8;
148 tf->hob_lbam = lbam >> 8;
149 tf->hob_lbah = lbah >> 8;
157 * Read the interrupt register and process for the devices that have them pending.
159 static irqreturn_t vsc_sata_interrupt (int irq, void *dev_instance,
160 struct pt_regs *regs)
162 struct ata_host_set *host_set = dev_instance;
164 unsigned int handled = 0;
167 spin_lock(&host_set->lock);
169 int_status = readl(host_set->mmio_base + VSC_SATA_INT_STAT_OFFSET);
171 for (i = 0; i < host_set->n_ports; i++) {
172 if (int_status & ((u32) 0xFF << (8 * i))) {
175 ap = host_set->ports[i];
176 if (ap && !(ap->flags &
177 (ATA_FLAG_PORT_DISABLED|ATA_FLAG_NOINTR))) {
178 struct ata_queued_cmd *qc;
180 qc = ata_qc_from_tag(ap, ap->active_tag);
181 if (qc && (!(qc->tf.ctl & ATA_NIEN)))
182 handled += ata_host_intr(ap, qc);
187 spin_unlock(&host_set->lock);
189 return IRQ_RETVAL(handled);
193 static Scsi_Host_Template vsc_sata_sht = {
194 .module = THIS_MODULE,
196 .ioctl = ata_scsi_ioctl,
197 .queuecommand = ata_scsi_queuecmd,
198 .eh_strategy_handler = ata_scsi_error,
199 .can_queue = ATA_DEF_QUEUE,
200 .this_id = ATA_SHT_THIS_ID,
201 .sg_tablesize = LIBATA_MAX_PRD,
202 .max_sectors = ATA_MAX_SECTORS,
203 .cmd_per_lun = ATA_SHT_CMD_PER_LUN,
204 .emulated = ATA_SHT_EMULATED,
205 .use_clustering = ATA_SHT_USE_CLUSTERING,
206 .proc_name = DRV_NAME,
207 .dma_boundary = ATA_DMA_BOUNDARY,
208 .slave_configure = ata_scsi_slave_config,
209 .bios_param = ata_std_bios_param,
214 static struct ata_port_operations vsc_sata_ops = {
215 .port_disable = ata_port_disable,
216 .tf_load = vsc_sata_tf_load,
217 .tf_read = vsc_sata_tf_read,
218 .exec_command = ata_exec_command,
219 .check_status = ata_check_status,
220 .dev_select = ata_std_dev_select,
221 .phy_reset = sata_phy_reset,
222 .bmdma_setup = ata_bmdma_setup,
223 .bmdma_start = ata_bmdma_start,
224 .bmdma_stop = ata_bmdma_stop,
225 .bmdma_status = ata_bmdma_status,
226 .qc_prep = ata_qc_prep,
227 .qc_issue = ata_qc_issue_prot,
228 .eng_timeout = ata_eng_timeout,
229 .irq_handler = vsc_sata_interrupt,
230 .irq_clear = ata_bmdma_irq_clear,
231 .scr_read = vsc_sata_scr_read,
232 .scr_write = vsc_sata_scr_write,
233 .port_start = ata_port_start,
234 .port_stop = ata_port_stop,
235 .host_stop = ata_host_stop,
238 static void __devinit vsc_sata_setup_port(struct ata_ioports *port, unsigned long base)
240 port->cmd_addr = base + VSC_SATA_TF_CMD_OFFSET;
241 port->data_addr = base + VSC_SATA_TF_DATA_OFFSET;
242 port->error_addr = base + VSC_SATA_TF_ERROR_OFFSET;
243 port->feature_addr = base + VSC_SATA_TF_FEATURE_OFFSET;
244 port->nsect_addr = base + VSC_SATA_TF_NSECT_OFFSET;
245 port->lbal_addr = base + VSC_SATA_TF_LBAL_OFFSET;
246 port->lbam_addr = base + VSC_SATA_TF_LBAM_OFFSET;
247 port->lbah_addr = base + VSC_SATA_TF_LBAH_OFFSET;
248 port->device_addr = base + VSC_SATA_TF_DEVICE_OFFSET;
249 port->status_addr = base + VSC_SATA_TF_STATUS_OFFSET;
250 port->command_addr = base + VSC_SATA_TF_COMMAND_OFFSET;
251 port->altstatus_addr = base + VSC_SATA_TF_ALTSTATUS_OFFSET;
252 port->ctl_addr = base + VSC_SATA_TF_CTL_OFFSET;
253 port->bmdma_addr = base + VSC_SATA_DMA_CMD_OFFSET;
254 port->scr_addr = base + VSC_SATA_SCR_STATUS_OFFSET;
255 writel(0, base + VSC_SATA_UP_DESCRIPTOR_OFFSET);
256 writel(0, base + VSC_SATA_UP_DATA_BUFFER_OFFSET);
260 static int __devinit vsc_sata_init_one (struct pci_dev *pdev, const struct pci_device_id *ent)
262 static int printed_version;
263 struct ata_probe_ent *probe_ent = NULL;
265 int pci_dev_busy = 0;
269 if (!printed_version++)
270 printk(KERN_DEBUG DRV_NAME " version " DRV_VERSION "\n");
272 rc = pci_enable_device(pdev);
277 * Check if we have needed resource mapped.
279 if (pci_resource_len(pdev, 0) == 0) {
284 rc = pci_request_regions(pdev, DRV_NAME);
291 * Use 32 bit DMA mask, because 64 bit address support is poor.
293 rc = pci_set_dma_mask(pdev, DMA_32BIT_MASK);
295 goto err_out_regions;
296 rc = pci_set_consistent_dma_mask(pdev, DMA_32BIT_MASK);
298 goto err_out_regions;
300 probe_ent = kmalloc(sizeof(*probe_ent), GFP_KERNEL);
301 if (probe_ent == NULL) {
303 goto err_out_regions;
305 memset(probe_ent, 0, sizeof(*probe_ent));
306 probe_ent->dev = pci_dev_to_dev(pdev);
307 INIT_LIST_HEAD(&probe_ent->node);
309 mmio_base = ioremap(pci_resource_start(pdev, 0),
310 pci_resource_len(pdev, 0));
311 if (mmio_base == NULL) {
313 goto err_out_free_ent;
315 base = (unsigned long) mmio_base;
318 * Due to a bug in the chip, the default cache line size can't be used
320 pci_write_config_byte(pdev, PCI_CACHE_LINE_SIZE, 0x80);
322 probe_ent->sht = &vsc_sata_sht;
323 probe_ent->host_flags = ATA_FLAG_SATA | ATA_FLAG_NO_LEGACY |
324 ATA_FLAG_MMIO | ATA_FLAG_SATA_RESET;
325 probe_ent->port_ops = &vsc_sata_ops;
326 probe_ent->n_ports = 4;
327 probe_ent->irq = pdev->irq;
328 probe_ent->irq_flags = SA_SHIRQ;
329 probe_ent->mmio_base = mmio_base;
331 /* We don't care much about the PIO/UDMA masks, but the core won't like us
332 * if we don't fill these
334 probe_ent->pio_mask = 0x1f;
335 probe_ent->mwdma_mask = 0x07;
336 probe_ent->udma_mask = 0x7f;
338 /* We have 4 ports per PCI function */
339 vsc_sata_setup_port(&probe_ent->port[0], base + 1 * VSC_SATA_PORT_OFFSET);
340 vsc_sata_setup_port(&probe_ent->port[1], base + 2 * VSC_SATA_PORT_OFFSET);
341 vsc_sata_setup_port(&probe_ent->port[2], base + 3 * VSC_SATA_PORT_OFFSET);
342 vsc_sata_setup_port(&probe_ent->port[3], base + 4 * VSC_SATA_PORT_OFFSET);
344 pci_set_master(pdev);
347 * Config offset 0x98 is "Extended Control and Status Register 0"
348 * Default value is (1 << 28). All bits except bit 28 are reserved in
349 * DPA mode. If bit 28 is set, LED 0 reflects all ports' activity.
350 * If bit 28 is clear, each port has its own LED.
352 pci_write_config_dword(pdev, 0x98, 0);
354 /* FIXME: check ata_device_add return value */
355 ata_device_add(probe_ent);
363 pci_release_regions(pdev);
366 pci_disable_device(pdev);
372 * 0x1725/0x7174 is the Vitesse VSC-7174
373 * 0x8086/0x3200 is the Intel 31244, which is supposed to be identical
374 * compatibility is untested as of yet
376 static struct pci_device_id vsc_sata_pci_tbl[] = {
377 { 0x1725, 0x7174, PCI_ANY_ID, PCI_ANY_ID, 0x10600, 0xFFFFFF, 0 },
378 { 0x8086, 0x3200, PCI_ANY_ID, PCI_ANY_ID, 0x10600, 0xFFFFFF, 0 },
383 static struct pci_driver vsc_sata_pci_driver = {
385 .id_table = vsc_sata_pci_tbl,
386 .probe = vsc_sata_init_one,
387 .remove = ata_pci_remove_one,
391 static int __init vsc_sata_init(void)
393 return pci_module_init(&vsc_sata_pci_driver);
397 static void __exit vsc_sata_exit(void)
399 pci_unregister_driver(&vsc_sata_pci_driver);
403 MODULE_AUTHOR("Jeremy Higdon");
404 MODULE_DESCRIPTION("low-level driver for Vitesse VSC7174 SATA controller");
405 MODULE_LICENSE("GPL");
406 MODULE_DEVICE_TABLE(pci, vsc_sata_pci_tbl);
407 MODULE_VERSION(DRV_VERSION);
409 module_init(vsc_sata_init);
410 module_exit(vsc_sata_exit);