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1da177e4 LT |
1 | /* |
2 | * sata_vsc.c - Vitesse VSC7174 4 port DPA SATA | |
3 | * | |
4 | * Maintained by: Jeremy Higdon @ SGI | |
5 | * Please ALWAYS copy linux-ide@vger.kernel.org | |
6 | * on emails. | |
7 | * | |
8 | * Copyright 2004 SGI | |
9 | * | |
10 | * Bits from Jeff Garzik, Copyright RedHat, Inc. | |
11 | * | |
af36d7f0 JG |
12 | * |
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) | |
16 | * any later version. | |
17 | * | |
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. | |
22 | * | |
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. | |
26 | * | |
27 | * | |
28 | * libata documentation is available via 'make {ps|pdf}docs', | |
29 | * as Documentation/DocBook/libata.* | |
30 | * | |
31 | * Vitesse hardware documentation presumably available under NDA. | |
32 | * Intel 31244 (same hardware interface) documentation presumably | |
33 | * available from http://developer.intel.com/ | |
34 | * | |
1da177e4 LT |
35 | */ |
36 | ||
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> | |
7003c05d | 44 | #include <linux/dma-mapping.h> |
a9524a76 | 45 | #include <linux/device.h> |
1da177e4 LT |
46 | #include <scsi/scsi_host.h> |
47 | #include <linux/libata.h> | |
48 | ||
49 | #define DRV_NAME "sata_vsc" | |
7bdd7208 | 50 | #define DRV_VERSION "1.1" |
1da177e4 LT |
51 | |
52 | /* Interrupt register offsets (from chip base address) */ | |
53 | #define VSC_SATA_INT_STAT_OFFSET 0x00 | |
54 | #define VSC_SATA_INT_MASK_OFFSET 0x04 | |
55 | ||
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 | |
70 | ||
71 | /* DMA base */ | |
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 | |
75 | ||
76 | /* SCRs base */ | |
77 | #define VSC_SATA_SCR_STATUS_OFFSET 0x100 | |
78 | #define VSC_SATA_SCR_ERROR_OFFSET 0x104 | |
79 | #define VSC_SATA_SCR_CONTROL_OFFSET 0x108 | |
80 | ||
81 | /* Port stride */ | |
82 | #define VSC_SATA_PORT_OFFSET 0x200 | |
83 | ||
2ae5b30f DW |
84 | /* Error interrupt status bit offsets */ |
85 | #define VSC_SATA_INT_ERROR_E_OFFSET 2 | |
86 | #define VSC_SATA_INT_ERROR_P_OFFSET 4 | |
87 | #define VSC_SATA_INT_ERROR_T_OFFSET 5 | |
88 | #define VSC_SATA_INT_ERROR_M_OFFSET 1 | |
89 | #define is_vsc_sata_int_err(port_idx, int_status) \ | |
90 | (int_status & ((1 << (VSC_SATA_INT_ERROR_E_OFFSET + (8 * port_idx))) | \ | |
91 | (1 << (VSC_SATA_INT_ERROR_P_OFFSET + (8 * port_idx))) | \ | |
92 | (1 << (VSC_SATA_INT_ERROR_T_OFFSET + (8 * port_idx))) | \ | |
93 | (1 << (VSC_SATA_INT_ERROR_M_OFFSET + (8 * port_idx))) \ | |
94 | )\ | |
95 | ) | |
96 | ||
1da177e4 LT |
97 | |
98 | static u32 vsc_sata_scr_read (struct ata_port *ap, unsigned int sc_reg) | |
99 | { | |
100 | if (sc_reg > SCR_CONTROL) | |
101 | return 0xffffffffU; | |
307e4dc2 | 102 | return readl((void __iomem *) ap->ioaddr.scr_addr + (sc_reg * 4)); |
1da177e4 LT |
103 | } |
104 | ||
105 | ||
106 | static void vsc_sata_scr_write (struct ata_port *ap, unsigned int sc_reg, | |
107 | u32 val) | |
108 | { | |
109 | if (sc_reg > SCR_CONTROL) | |
110 | return; | |
307e4dc2 | 111 | writel(val, (void __iomem *) ap->ioaddr.scr_addr + (sc_reg * 4)); |
1da177e4 LT |
112 | } |
113 | ||
114 | ||
115 | static void vsc_intr_mask_update(struct ata_port *ap, u8 ctl) | |
116 | { | |
307e4dc2 | 117 | void __iomem *mask_addr; |
1da177e4 LT |
118 | u8 mask; |
119 | ||
307e4dc2 | 120 | mask_addr = ap->host_set->mmio_base + |
1da177e4 LT |
121 | VSC_SATA_INT_MASK_OFFSET + ap->port_no; |
122 | mask = readb(mask_addr); | |
123 | if (ctl & ATA_NIEN) | |
124 | mask |= 0x80; | |
125 | else | |
126 | mask &= 0x7F; | |
127 | writeb(mask, mask_addr); | |
128 | } | |
129 | ||
130 | ||
057ace5e | 131 | static void vsc_sata_tf_load(struct ata_port *ap, const struct ata_taskfile *tf) |
1da177e4 LT |
132 | { |
133 | struct ata_ioports *ioaddr = &ap->ioaddr; | |
134 | unsigned int is_addr = tf->flags & ATA_TFLAG_ISADDR; | |
135 | ||
136 | /* | |
137 | * The only thing the ctl register is used for is SRST. | |
138 | * That is not enabled or disabled via tf_load. | |
139 | * However, if ATA_NIEN is changed, then we need to change the interrupt register. | |
140 | */ | |
141 | if ((tf->ctl & ATA_NIEN) != (ap->last_ctl & ATA_NIEN)) { | |
142 | ap->last_ctl = tf->ctl; | |
143 | vsc_intr_mask_update(ap, tf->ctl & ATA_NIEN); | |
144 | } | |
145 | if (is_addr && (tf->flags & ATA_TFLAG_LBA48)) { | |
146 | writew(tf->feature | (((u16)tf->hob_feature) << 8), ioaddr->feature_addr); | |
147 | writew(tf->nsect | (((u16)tf->hob_nsect) << 8), ioaddr->nsect_addr); | |
148 | writew(tf->lbal | (((u16)tf->hob_lbal) << 8), ioaddr->lbal_addr); | |
149 | writew(tf->lbam | (((u16)tf->hob_lbam) << 8), ioaddr->lbam_addr); | |
150 | writew(tf->lbah | (((u16)tf->hob_lbah) << 8), ioaddr->lbah_addr); | |
151 | } else if (is_addr) { | |
152 | writew(tf->feature, ioaddr->feature_addr); | |
153 | writew(tf->nsect, ioaddr->nsect_addr); | |
154 | writew(tf->lbal, ioaddr->lbal_addr); | |
155 | writew(tf->lbam, ioaddr->lbam_addr); | |
156 | writew(tf->lbah, ioaddr->lbah_addr); | |
157 | } | |
158 | ||
159 | if (tf->flags & ATA_TFLAG_DEVICE) | |
160 | writeb(tf->device, ioaddr->device_addr); | |
161 | ||
162 | ata_wait_idle(ap); | |
163 | } | |
164 | ||
165 | ||
166 | static void vsc_sata_tf_read(struct ata_port *ap, struct ata_taskfile *tf) | |
167 | { | |
168 | struct ata_ioports *ioaddr = &ap->ioaddr; | |
ac19bff2 | 169 | u16 nsect, lbal, lbam, lbah, feature; |
1da177e4 | 170 | |
ac19bff2 | 171 | tf->command = ata_check_status(ap); |
1da177e4 | 172 | tf->device = readw(ioaddr->device_addr); |
ac19bff2 JG |
173 | feature = readw(ioaddr->error_addr); |
174 | nsect = readw(ioaddr->nsect_addr); | |
175 | lbal = readw(ioaddr->lbal_addr); | |
176 | lbam = readw(ioaddr->lbam_addr); | |
177 | lbah = readw(ioaddr->lbah_addr); | |
178 | ||
179 | tf->feature = feature; | |
180 | tf->nsect = nsect; | |
181 | tf->lbal = lbal; | |
182 | tf->lbam = lbam; | |
183 | tf->lbah = lbah; | |
1da177e4 LT |
184 | |
185 | if (tf->flags & ATA_TFLAG_LBA48) { | |
ac19bff2 | 186 | tf->hob_feature = feature >> 8; |
1da177e4 LT |
187 | tf->hob_nsect = nsect >> 8; |
188 | tf->hob_lbal = lbal >> 8; | |
189 | tf->hob_lbam = lbam >> 8; | |
190 | tf->hob_lbah = lbah >> 8; | |
191 | } | |
192 | } | |
193 | ||
194 | ||
195 | /* | |
196 | * vsc_sata_interrupt | |
197 | * | |
198 | * Read the interrupt register and process for the devices that have them pending. | |
199 | */ | |
200 | static irqreturn_t vsc_sata_interrupt (int irq, void *dev_instance, | |
201 | struct pt_regs *regs) | |
202 | { | |
203 | struct ata_host_set *host_set = dev_instance; | |
204 | unsigned int i; | |
205 | unsigned int handled = 0; | |
206 | u32 int_status; | |
207 | ||
208 | spin_lock(&host_set->lock); | |
209 | ||
210 | int_status = readl(host_set->mmio_base + VSC_SATA_INT_STAT_OFFSET); | |
211 | ||
212 | for (i = 0; i < host_set->n_ports; i++) { | |
213 | if (int_status & ((u32) 0xFF << (8 * i))) { | |
214 | struct ata_port *ap; | |
215 | ||
216 | ap = host_set->ports[i]; | |
2ae5b30f DW |
217 | |
218 | if (is_vsc_sata_int_err(i, int_status)) { | |
219 | u32 err_status; | |
220 | printk(KERN_DEBUG "%s: ignoring interrupt(s)\n", __FUNCTION__); | |
221 | err_status = ap ? vsc_sata_scr_read(ap, SCR_ERROR) : 0; | |
222 | vsc_sata_scr_write(ap, SCR_ERROR, err_status); | |
223 | handled++; | |
224 | } | |
225 | ||
c1389503 TH |
226 | if (ap && !(ap->flags & |
227 | (ATA_FLAG_PORT_DISABLED|ATA_FLAG_NOINTR))) { | |
1da177e4 LT |
228 | struct ata_queued_cmd *qc; |
229 | ||
230 | qc = ata_qc_from_tag(ap, ap->active_tag); | |
2ae5b30f | 231 | if (qc && (!(qc->tf.ctl & ATA_NIEN))) { |
1da177e4 | 232 | handled += ata_host_intr(ap, qc); |
2ae5b30f DW |
233 | } else { |
234 | printk(KERN_DEBUG "%s: ignoring interrupt(s)\n", __FUNCTION__); | |
235 | ata_chk_status(ap); | |
236 | handled++; | |
237 | } | |
238 | ||
1da177e4 LT |
239 | } |
240 | } | |
241 | } | |
242 | ||
243 | spin_unlock(&host_set->lock); | |
244 | ||
245 | return IRQ_RETVAL(handled); | |
246 | } | |
247 | ||
248 | ||
193515d5 | 249 | static struct scsi_host_template vsc_sata_sht = { |
1da177e4 LT |
250 | .module = THIS_MODULE, |
251 | .name = DRV_NAME, | |
252 | .ioctl = ata_scsi_ioctl, | |
253 | .queuecommand = ata_scsi_queuecmd, | |
254 | .eh_strategy_handler = ata_scsi_error, | |
255 | .can_queue = ATA_DEF_QUEUE, | |
256 | .this_id = ATA_SHT_THIS_ID, | |
257 | .sg_tablesize = LIBATA_MAX_PRD, | |
1da177e4 LT |
258 | .cmd_per_lun = ATA_SHT_CMD_PER_LUN, |
259 | .emulated = ATA_SHT_EMULATED, | |
260 | .use_clustering = ATA_SHT_USE_CLUSTERING, | |
261 | .proc_name = DRV_NAME, | |
262 | .dma_boundary = ATA_DMA_BOUNDARY, | |
263 | .slave_configure = ata_scsi_slave_config, | |
264 | .bios_param = ata_std_bios_param, | |
1da177e4 LT |
265 | }; |
266 | ||
267 | ||
057ace5e | 268 | static const struct ata_port_operations vsc_sata_ops = { |
1da177e4 LT |
269 | .port_disable = ata_port_disable, |
270 | .tf_load = vsc_sata_tf_load, | |
271 | .tf_read = vsc_sata_tf_read, | |
272 | .exec_command = ata_exec_command, | |
273 | .check_status = ata_check_status, | |
274 | .dev_select = ata_std_dev_select, | |
275 | .phy_reset = sata_phy_reset, | |
276 | .bmdma_setup = ata_bmdma_setup, | |
277 | .bmdma_start = ata_bmdma_start, | |
278 | .bmdma_stop = ata_bmdma_stop, | |
279 | .bmdma_status = ata_bmdma_status, | |
280 | .qc_prep = ata_qc_prep, | |
281 | .qc_issue = ata_qc_issue_prot, | |
282 | .eng_timeout = ata_eng_timeout, | |
283 | .irq_handler = vsc_sata_interrupt, | |
284 | .irq_clear = ata_bmdma_irq_clear, | |
285 | .scr_read = vsc_sata_scr_read, | |
286 | .scr_write = vsc_sata_scr_write, | |
287 | .port_start = ata_port_start, | |
288 | .port_stop = ata_port_stop, | |
374b1873 | 289 | .host_stop = ata_pci_host_stop, |
1da177e4 LT |
290 | }; |
291 | ||
292 | static void __devinit vsc_sata_setup_port(struct ata_ioports *port, unsigned long base) | |
293 | { | |
294 | port->cmd_addr = base + VSC_SATA_TF_CMD_OFFSET; | |
295 | port->data_addr = base + VSC_SATA_TF_DATA_OFFSET; | |
296 | port->error_addr = base + VSC_SATA_TF_ERROR_OFFSET; | |
297 | port->feature_addr = base + VSC_SATA_TF_FEATURE_OFFSET; | |
298 | port->nsect_addr = base + VSC_SATA_TF_NSECT_OFFSET; | |
299 | port->lbal_addr = base + VSC_SATA_TF_LBAL_OFFSET; | |
300 | port->lbam_addr = base + VSC_SATA_TF_LBAM_OFFSET; | |
301 | port->lbah_addr = base + VSC_SATA_TF_LBAH_OFFSET; | |
302 | port->device_addr = base + VSC_SATA_TF_DEVICE_OFFSET; | |
303 | port->status_addr = base + VSC_SATA_TF_STATUS_OFFSET; | |
304 | port->command_addr = base + VSC_SATA_TF_COMMAND_OFFSET; | |
305 | port->altstatus_addr = base + VSC_SATA_TF_ALTSTATUS_OFFSET; | |
306 | port->ctl_addr = base + VSC_SATA_TF_CTL_OFFSET; | |
307 | port->bmdma_addr = base + VSC_SATA_DMA_CMD_OFFSET; | |
308 | port->scr_addr = base + VSC_SATA_SCR_STATUS_OFFSET; | |
309 | writel(0, base + VSC_SATA_UP_DESCRIPTOR_OFFSET); | |
310 | writel(0, base + VSC_SATA_UP_DATA_BUFFER_OFFSET); | |
311 | } | |
312 | ||
313 | ||
314 | static int __devinit vsc_sata_init_one (struct pci_dev *pdev, const struct pci_device_id *ent) | |
315 | { | |
316 | static int printed_version; | |
317 | struct ata_probe_ent *probe_ent = NULL; | |
318 | unsigned long base; | |
319 | int pci_dev_busy = 0; | |
307e4dc2 | 320 | void __iomem *mmio_base; |
1da177e4 LT |
321 | int rc; |
322 | ||
323 | if (!printed_version++) | |
a9524a76 | 324 | dev_printk(KERN_DEBUG, &pdev->dev, "version " DRV_VERSION "\n"); |
1da177e4 LT |
325 | |
326 | rc = pci_enable_device(pdev); | |
327 | if (rc) | |
328 | return rc; | |
329 | ||
330 | /* | |
331 | * Check if we have needed resource mapped. | |
332 | */ | |
333 | if (pci_resource_len(pdev, 0) == 0) { | |
334 | rc = -ENODEV; | |
335 | goto err_out; | |
336 | } | |
337 | ||
338 | rc = pci_request_regions(pdev, DRV_NAME); | |
339 | if (rc) { | |
340 | pci_dev_busy = 1; | |
341 | goto err_out; | |
342 | } | |
343 | ||
344 | /* | |
345 | * Use 32 bit DMA mask, because 64 bit address support is poor. | |
346 | */ | |
347 | rc = pci_set_dma_mask(pdev, DMA_32BIT_MASK); | |
348 | if (rc) | |
349 | goto err_out_regions; | |
350 | rc = pci_set_consistent_dma_mask(pdev, DMA_32BIT_MASK); | |
351 | if (rc) | |
352 | goto err_out_regions; | |
353 | ||
354 | probe_ent = kmalloc(sizeof(*probe_ent), GFP_KERNEL); | |
355 | if (probe_ent == NULL) { | |
356 | rc = -ENOMEM; | |
357 | goto err_out_regions; | |
358 | } | |
359 | memset(probe_ent, 0, sizeof(*probe_ent)); | |
360 | probe_ent->dev = pci_dev_to_dev(pdev); | |
361 | INIT_LIST_HEAD(&probe_ent->node); | |
362 | ||
374b1873 | 363 | mmio_base = pci_iomap(pdev, 0, 0); |
1da177e4 LT |
364 | if (mmio_base == NULL) { |
365 | rc = -ENOMEM; | |
366 | goto err_out_free_ent; | |
367 | } | |
368 | base = (unsigned long) mmio_base; | |
369 | ||
370 | /* | |
371 | * Due to a bug in the chip, the default cache line size can't be used | |
372 | */ | |
373 | pci_write_config_byte(pdev, PCI_CACHE_LINE_SIZE, 0x80); | |
374 | ||
375 | probe_ent->sht = &vsc_sata_sht; | |
376 | probe_ent->host_flags = ATA_FLAG_SATA | ATA_FLAG_NO_LEGACY | | |
377 | ATA_FLAG_MMIO | ATA_FLAG_SATA_RESET; | |
378 | probe_ent->port_ops = &vsc_sata_ops; | |
379 | probe_ent->n_ports = 4; | |
380 | probe_ent->irq = pdev->irq; | |
381 | probe_ent->irq_flags = SA_SHIRQ; | |
382 | probe_ent->mmio_base = mmio_base; | |
383 | ||
384 | /* We don't care much about the PIO/UDMA masks, but the core won't like us | |
385 | * if we don't fill these | |
386 | */ | |
387 | probe_ent->pio_mask = 0x1f; | |
388 | probe_ent->mwdma_mask = 0x07; | |
389 | probe_ent->udma_mask = 0x7f; | |
390 | ||
391 | /* We have 4 ports per PCI function */ | |
392 | vsc_sata_setup_port(&probe_ent->port[0], base + 1 * VSC_SATA_PORT_OFFSET); | |
393 | vsc_sata_setup_port(&probe_ent->port[1], base + 2 * VSC_SATA_PORT_OFFSET); | |
394 | vsc_sata_setup_port(&probe_ent->port[2], base + 3 * VSC_SATA_PORT_OFFSET); | |
395 | vsc_sata_setup_port(&probe_ent->port[3], base + 4 * VSC_SATA_PORT_OFFSET); | |
396 | ||
397 | pci_set_master(pdev); | |
398 | ||
8a60a071 | 399 | /* |
1da177e4 LT |
400 | * Config offset 0x98 is "Extended Control and Status Register 0" |
401 | * Default value is (1 << 28). All bits except bit 28 are reserved in | |
402 | * DPA mode. If bit 28 is set, LED 0 reflects all ports' activity. | |
403 | * If bit 28 is clear, each port has its own LED. | |
404 | */ | |
405 | pci_write_config_dword(pdev, 0x98, 0); | |
406 | ||
407 | /* FIXME: check ata_device_add return value */ | |
408 | ata_device_add(probe_ent); | |
409 | kfree(probe_ent); | |
410 | ||
411 | return 0; | |
412 | ||
413 | err_out_free_ent: | |
414 | kfree(probe_ent); | |
415 | err_out_regions: | |
416 | pci_release_regions(pdev); | |
417 | err_out: | |
418 | if (!pci_dev_busy) | |
419 | pci_disable_device(pdev); | |
420 | return rc; | |
421 | } | |
422 | ||
423 | ||
424 | /* | |
425 | * 0x1725/0x7174 is the Vitesse VSC-7174 | |
426 | * 0x8086/0x3200 is the Intel 31244, which is supposed to be identical | |
427 | * compatibility is untested as of yet | |
428 | */ | |
3b7d697d | 429 | static const struct pci_device_id vsc_sata_pci_tbl[] = { |
1da177e4 LT |
430 | { 0x1725, 0x7174, PCI_ANY_ID, PCI_ANY_ID, 0x10600, 0xFFFFFF, 0 }, |
431 | { 0x8086, 0x3200, PCI_ANY_ID, PCI_ANY_ID, 0x10600, 0xFFFFFF, 0 }, | |
432 | { } | |
433 | }; | |
434 | ||
435 | ||
436 | static struct pci_driver vsc_sata_pci_driver = { | |
437 | .name = DRV_NAME, | |
438 | .id_table = vsc_sata_pci_tbl, | |
439 | .probe = vsc_sata_init_one, | |
440 | .remove = ata_pci_remove_one, | |
441 | }; | |
442 | ||
443 | ||
444 | static int __init vsc_sata_init(void) | |
445 | { | |
446 | return pci_module_init(&vsc_sata_pci_driver); | |
447 | } | |
448 | ||
449 | ||
450 | static void __exit vsc_sata_exit(void) | |
451 | { | |
452 | pci_unregister_driver(&vsc_sata_pci_driver); | |
453 | } | |
454 | ||
455 | ||
456 | MODULE_AUTHOR("Jeremy Higdon"); | |
457 | MODULE_DESCRIPTION("low-level driver for Vitesse VSC7174 SATA controller"); | |
458 | MODULE_LICENSE("GPL"); | |
459 | MODULE_DEVICE_TABLE(pci, vsc_sata_pci_tbl); | |
460 | MODULE_VERSION(DRV_VERSION); | |
461 | ||
462 | module_init(vsc_sata_init); | |
463 | module_exit(vsc_sata_exit); |