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Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
2 * sata_qstor.c - Pacific Digital Corporation QStor SATA
3 *
4 * Maintained by: Mark Lord <mlord@pobox.com>
5 *
6 * Copyright 2005 Pacific Digital Corporation.
7 * (OSL/GPL code release authorized by Jalil Fadavi).
8 *
Linus Torvalds1da177e2005-04-16 15:20:36 -07009 *
Jeff Garzikaf36d7f2005-08-28 20:18:39 -040010 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License as published by
12 * the Free Software Foundation; either version 2, or (at your option)
13 * any later version.
14 *
15 * This program is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 * GNU General Public License for more details.
19 *
20 * You should have received a copy of the GNU General Public License
21 * along with this program; see the file COPYING. If not, write to
22 * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
23 *
24 *
25 * libata documentation is available via 'make {ps|pdf}docs',
26 * as Documentation/DocBook/libata.*
Linus Torvalds1da177e2005-04-16 15:20:36 -070027 *
28 */
29
30#include <linux/kernel.h>
31#include <linux/module.h>
Tejun Heo5a0e3ad2010-03-24 17:04:11 +090032#include <linux/gfp.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070033#include <linux/pci.h>
34#include <linux/init.h>
35#include <linux/blkdev.h>
36#include <linux/delay.h>
37#include <linux/interrupt.h>
Jeff Garzika9524a72005-10-30 14:39:11 -050038#include <linux/device.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070039#include <scsi/scsi_host.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070040#include <linux/libata.h>
41
42#define DRV_NAME "sata_qstor"
Jeff Garzik2a3103c2007-08-31 04:54:06 -040043#define DRV_VERSION "0.09"
Linus Torvalds1da177e2005-04-16 15:20:36 -070044
45enum {
Tejun Heo0d5ff562007-02-01 15:06:36 +090046 QS_MMIO_BAR = 4,
47
Linus Torvalds1da177e2005-04-16 15:20:36 -070048 QS_PORTS = 4,
49 QS_MAX_PRD = LIBATA_MAX_PRD,
50 QS_CPB_ORDER = 6,
51 QS_CPB_BYTES = (1 << QS_CPB_ORDER),
52 QS_PRD_BYTES = QS_MAX_PRD * 16,
53 QS_PKT_BYTES = QS_CPB_BYTES + QS_PRD_BYTES,
54
Linus Torvalds1da177e2005-04-16 15:20:36 -070055 /* global register offsets */
56 QS_HCF_CNFG3 = 0x0003, /* host configuration offset */
57 QS_HID_HPHY = 0x0004, /* host physical interface info */
58 QS_HCT_CTRL = 0x00e4, /* global interrupt mask offset */
59 QS_HST_SFF = 0x0100, /* host status fifo offset */
60 QS_HVS_SERD3 = 0x0393, /* PHY enable offset */
61
62 /* global control bits */
63 QS_HPHY_64BIT = (1 << 1), /* 64-bit bus detected */
64 QS_CNFG3_GSRST = 0x01, /* global chip reset */
65 QS_SERD3_PHY_ENA = 0xf0, /* PHY detection ENAble*/
66
67 /* per-channel register offsets */
68 QS_CCF_CPBA = 0x0710, /* chan CPB base address */
69 QS_CCF_CSEP = 0x0718, /* chan CPB separation factor */
70 QS_CFC_HUFT = 0x0800, /* host upstream fifo threshold */
71 QS_CFC_HDFT = 0x0804, /* host downstream fifo threshold */
72 QS_CFC_DUFT = 0x0808, /* dev upstream fifo threshold */
73 QS_CFC_DDFT = 0x080c, /* dev downstream fifo threshold */
74 QS_CCT_CTR0 = 0x0900, /* chan control-0 offset */
75 QS_CCT_CTR1 = 0x0901, /* chan control-1 offset */
76 QS_CCT_CFF = 0x0a00, /* chan command fifo offset */
77
78 /* channel control bits */
79 QS_CTR0_REG = (1 << 1), /* register mode (vs. pkt mode) */
80 QS_CTR0_CLER = (1 << 2), /* clear channel errors */
81 QS_CTR1_RDEV = (1 << 1), /* sata phy/comms reset */
82 QS_CTR1_RCHN = (1 << 4), /* reset channel logic */
83 QS_CCF_RUN_PKT = 0x107, /* RUN a new dma PKT */
84
85 /* pkt sub-field headers */
86 QS_HCB_HDR = 0x01, /* Host Control Block header */
87 QS_DCB_HDR = 0x02, /* Device Control Block header */
88
89 /* pkt HCB flag bits */
90 QS_HF_DIRO = (1 << 0), /* data DIRection Out */
91 QS_HF_DAT = (1 << 3), /* DATa pkt */
92 QS_HF_IEN = (1 << 4), /* Interrupt ENable */
93 QS_HF_VLD = (1 << 5), /* VaLiD pkt */
94
95 /* pkt DCB flag bits */
96 QS_DF_PORD = (1 << 2), /* Pio OR Dma */
97 QS_DF_ELBA = (1 << 3), /* Extended LBA (lba48) */
98
99 /* PCI device IDs */
100 board_2068_idx = 0, /* QStor 4-port SATA/RAID */
101};
102
Al Viro0420dd12005-10-21 06:46:02 +0100103enum {
104 QS_DMA_BOUNDARY = ~0UL
105};
106
Mark Lord12ee7d32007-11-07 10:52:55 -0500107typedef enum { qs_state_mmio, qs_state_pkt } qs_state_t;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700108
109struct qs_port_priv {
110 u8 *pkt;
111 dma_addr_t pkt_dma;
112 qs_state_t state;
113};
114
Tejun Heo82ef04f2008-07-31 17:02:40 +0900115static int qs_scr_read(struct ata_link *link, unsigned int sc_reg, u32 *val);
116static int qs_scr_write(struct ata_link *link, unsigned int sc_reg, u32 val);
Jeff Garzik5796d1c2007-10-26 00:03:37 -0400117static int qs_ata_init_one(struct pci_dev *pdev, const struct pci_device_id *ent);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700118static int qs_port_start(struct ata_port *ap);
Jeff Garzikcca39742006-08-24 03:19:22 -0400119static void qs_host_stop(struct ata_host *host);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700120static void qs_qc_prep(struct ata_queued_cmd *qc);
Tejun Heo9a3d9eb2006-01-23 13:09:36 +0900121static unsigned int qs_qc_issue(struct ata_queued_cmd *qc);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700122static int qs_check_atapi_dma(struct ata_queued_cmd *qc);
Mark Lord6004bda12007-11-07 10:54:15 -0500123static void qs_freeze(struct ata_port *ap);
124static void qs_thaw(struct ata_port *ap);
Tejun Heoa1efdab2008-03-25 12:22:50 +0900125static int qs_prereset(struct ata_link *link, unsigned long deadline);
Mark Lord6004bda12007-11-07 10:54:15 -0500126static void qs_error_handler(struct ata_port *ap);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700127
Jeff Garzik193515d2005-11-07 00:59:37 -0500128static struct scsi_host_template qs_ata_sht = {
Tejun Heo68d1d072008-03-25 12:22:49 +0900129 ATA_BASE_SHT(DRV_NAME),
Linus Torvalds1da177e2005-04-16 15:20:36 -0700130 .sg_tablesize = QS_MAX_PRD,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700131 .dma_boundary = QS_DMA_BOUNDARY,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700132};
133
Tejun Heo029cfd62008-03-25 12:22:49 +0900134static struct ata_port_operations qs_ata_ops = {
135 .inherits = &ata_sff_port_ops,
136
Linus Torvalds1da177e2005-04-16 15:20:36 -0700137 .check_atapi_dma = qs_check_atapi_dma,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700138 .qc_prep = qs_qc_prep,
139 .qc_issue = qs_qc_issue,
Tejun Heo029cfd62008-03-25 12:22:49 +0900140
Mark Lord6004bda12007-11-07 10:54:15 -0500141 .freeze = qs_freeze,
142 .thaw = qs_thaw,
Tejun Heoa1efdab2008-03-25 12:22:50 +0900143 .prereset = qs_prereset,
144 .softreset = ATA_OP_NULL,
Mark Lord6004bda12007-11-07 10:54:15 -0500145 .error_handler = qs_error_handler,
Alan Coxc96f1732009-03-24 10:23:46 +0000146 .lost_interrupt = ATA_OP_NULL,
Tejun Heo029cfd62008-03-25 12:22:49 +0900147
Linus Torvalds1da177e2005-04-16 15:20:36 -0700148 .scr_read = qs_scr_read,
149 .scr_write = qs_scr_write,
Tejun Heo029cfd62008-03-25 12:22:49 +0900150
Linus Torvalds1da177e2005-04-16 15:20:36 -0700151 .port_start = qs_port_start,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700152 .host_stop = qs_host_stop,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700153};
154
Arjan van de Ven98ac62d2005-11-28 10:06:23 +0100155static const struct ata_port_info qs_port_info[] = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700156 /* board_2068_idx */
157 {
Jeff Garzikcca39742006-08-24 03:19:22 -0400158 .flags = ATA_FLAG_SATA | ATA_FLAG_NO_LEGACY |
Albert Leee50362e2005-09-27 17:39:50 +0800159 ATA_FLAG_MMIO | ATA_FLAG_PIO_POLLING,
Erik Inge Bolsø14bdef92009-03-14 21:38:24 +0100160 .pio_mask = ATA_PIO4_ONLY,
Jeff Garzikbf6263a2007-07-09 12:16:50 -0400161 .udma_mask = ATA_UDMA6,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700162 .port_ops = &qs_ata_ops,
163 },
164};
165
Jeff Garzik3b7d6972005-11-10 11:04:11 -0500166static const struct pci_device_id qs_ata_pci_tbl[] = {
Jeff Garzik2d2744f2006-09-28 20:21:59 -0400167 { PCI_VDEVICE(PDC, 0x2068), board_2068_idx },
Linus Torvalds1da177e2005-04-16 15:20:36 -0700168
169 { } /* terminate list */
170};
171
172static struct pci_driver qs_ata_pci_driver = {
173 .name = DRV_NAME,
174 .id_table = qs_ata_pci_tbl,
175 .probe = qs_ata_init_one,
176 .remove = ata_pci_remove_one,
177};
178
Tejun Heo0d5ff562007-02-01 15:06:36 +0900179static void __iomem *qs_mmio_base(struct ata_host *host)
180{
181 return host->iomap[QS_MMIO_BAR];
182}
183
Linus Torvalds1da177e2005-04-16 15:20:36 -0700184static int qs_check_atapi_dma(struct ata_queued_cmd *qc)
185{
186 return 1; /* ATAPI DMA not supported */
187}
188
Linus Torvalds1da177e2005-04-16 15:20:36 -0700189static inline void qs_enter_reg_mode(struct ata_port *ap)
190{
Tejun Heo0d5ff562007-02-01 15:06:36 +0900191 u8 __iomem *chan = qs_mmio_base(ap->host) + (ap->port_no * 0x4000);
Mark Lord12ee7d32007-11-07 10:52:55 -0500192 struct qs_port_priv *pp = ap->private_data;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700193
Mark Lord12ee7d32007-11-07 10:52:55 -0500194 pp->state = qs_state_mmio;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700195 writeb(QS_CTR0_REG, chan + QS_CCT_CTR0);
196 readb(chan + QS_CCT_CTR0); /* flush */
197}
198
199static inline void qs_reset_channel_logic(struct ata_port *ap)
200{
Tejun Heo0d5ff562007-02-01 15:06:36 +0900201 u8 __iomem *chan = qs_mmio_base(ap->host) + (ap->port_no * 0x4000);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700202
203 writeb(QS_CTR1_RCHN, chan + QS_CCT_CTR1);
204 readb(chan + QS_CCT_CTR0); /* flush */
205 qs_enter_reg_mode(ap);
206}
207
Mark Lord6004bda12007-11-07 10:54:15 -0500208static void qs_freeze(struct ata_port *ap)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700209{
Mark Lord6004bda12007-11-07 10:54:15 -0500210 u8 __iomem *mmio_base = qs_mmio_base(ap->host);
211
212 writeb(0, mmio_base + QS_HCT_CTRL); /* disable host interrupts */
213 qs_enter_reg_mode(ap);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700214}
215
Mark Lord6004bda12007-11-07 10:54:15 -0500216static void qs_thaw(struct ata_port *ap)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700217{
Mark Lord6004bda12007-11-07 10:54:15 -0500218 u8 __iomem *mmio_base = qs_mmio_base(ap->host);
219
220 qs_enter_reg_mode(ap);
221 writeb(1, mmio_base + QS_HCT_CTRL); /* enable host interrupts */
222}
223
224static int qs_prereset(struct ata_link *link, unsigned long deadline)
225{
226 struct ata_port *ap = link->ap;
227
Linus Torvalds1da177e2005-04-16 15:20:36 -0700228 qs_reset_channel_logic(ap);
Tejun Heo9363c382008-04-07 22:47:16 +0900229 return ata_sff_prereset(link, deadline);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700230}
231
Tejun Heo82ef04f2008-07-31 17:02:40 +0900232static int qs_scr_read(struct ata_link *link, unsigned int sc_reg, u32 *val)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700233{
234 if (sc_reg > SCR_CONTROL)
Tejun Heoda3dbb12007-07-16 14:29:40 +0900235 return -EINVAL;
Tejun Heo82ef04f2008-07-31 17:02:40 +0900236 *val = readl(link->ap->ioaddr.scr_addr + (sc_reg * 8));
Tejun Heoda3dbb12007-07-16 14:29:40 +0900237 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700238}
239
Mark Lord6004bda12007-11-07 10:54:15 -0500240static void qs_error_handler(struct ata_port *ap)
241{
242 qs_enter_reg_mode(ap);
Tejun Heofe06e5f2010-05-10 21:41:39 +0200243 ata_sff_error_handler(ap);
Mark Lord6004bda12007-11-07 10:54:15 -0500244}
245
Tejun Heo82ef04f2008-07-31 17:02:40 +0900246static int qs_scr_write(struct ata_link *link, unsigned int sc_reg, u32 val)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700247{
248 if (sc_reg > SCR_CONTROL)
Tejun Heoda3dbb12007-07-16 14:29:40 +0900249 return -EINVAL;
Tejun Heo82ef04f2008-07-31 17:02:40 +0900250 writel(val, link->ap->ioaddr.scr_addr + (sc_reg * 8));
Tejun Heoda3dbb12007-07-16 14:29:40 +0900251 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700252}
253
Jeff Garzik828d09d2005-11-12 01:27:07 -0500254static unsigned int qs_fill_sg(struct ata_queued_cmd *qc)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700255{
Jeff Garzikcedc9a42005-10-05 07:13:30 -0400256 struct scatterlist *sg;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700257 struct ata_port *ap = qc->ap;
258 struct qs_port_priv *pp = ap->private_data;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700259 u8 *prd = pp->pkt + QS_CPB_BYTES;
Tejun Heoff2aeb12007-12-05 16:43:11 +0900260 unsigned int si;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700261
Tejun Heoff2aeb12007-12-05 16:43:11 +0900262 for_each_sg(qc->sg, sg, qc->n_elem, si) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700263 u64 addr;
264 u32 len;
265
266 addr = sg_dma_address(sg);
267 *(__le64 *)prd = cpu_to_le64(addr);
268 prd += sizeof(u64);
269
270 len = sg_dma_len(sg);
271 *(__le32 *)prd = cpu_to_le32(len);
272 prd += sizeof(u64);
273
Tejun Heoff2aeb12007-12-05 16:43:11 +0900274 VPRINTK("PRD[%u] = (0x%llX, 0x%X)\n", si,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700275 (unsigned long long)addr, len);
276 }
Jeff Garzik828d09d2005-11-12 01:27:07 -0500277
Tejun Heoff2aeb12007-12-05 16:43:11 +0900278 return si;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700279}
280
281static void qs_qc_prep(struct ata_queued_cmd *qc)
282{
283 struct qs_port_priv *pp = qc->ap->private_data;
284 u8 dflags = QS_DF_PORD, *buf = pp->pkt;
285 u8 hflags = QS_HF_DAT | QS_HF_IEN | QS_HF_VLD;
286 u64 addr;
Jeff Garzik828d09d2005-11-12 01:27:07 -0500287 unsigned int nelem;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700288
289 VPRINTK("ENTER\n");
290
291 qs_enter_reg_mode(qc->ap);
Tejun Heof47451c2010-05-10 21:41:40 +0200292 if (qc->tf.protocol != ATA_PROT_DMA)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700293 return;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700294
Jeff Garzik828d09d2005-11-12 01:27:07 -0500295 nelem = qs_fill_sg(qc);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700296
297 if ((qc->tf.flags & ATA_TFLAG_WRITE))
298 hflags |= QS_HF_DIRO;
299 if ((qc->tf.flags & ATA_TFLAG_LBA48))
300 dflags |= QS_DF_ELBA;
301
302 /* host control block (HCB) */
303 buf[ 0] = QS_HCB_HDR;
304 buf[ 1] = hflags;
Tejun Heo726f0782007-01-03 17:30:39 +0900305 *(__le32 *)(&buf[ 4]) = cpu_to_le32(qc->nbytes);
Jeff Garzik828d09d2005-11-12 01:27:07 -0500306 *(__le32 *)(&buf[ 8]) = cpu_to_le32(nelem);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700307 addr = ((u64)pp->pkt_dma) + QS_CPB_BYTES;
308 *(__le64 *)(&buf[16]) = cpu_to_le64(addr);
309
310 /* device control block (DCB) */
311 buf[24] = QS_DCB_HDR;
312 buf[28] = dflags;
313
314 /* frame information structure (FIS) */
Tejun Heo99771262007-07-16 14:29:38 +0900315 ata_tf_to_fis(&qc->tf, 0, 1, &buf[32]);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700316}
317
318static inline void qs_packet_start(struct ata_queued_cmd *qc)
319{
320 struct ata_port *ap = qc->ap;
Tejun Heo0d5ff562007-02-01 15:06:36 +0900321 u8 __iomem *chan = qs_mmio_base(ap->host) + (ap->port_no * 0x4000);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700322
323 VPRINTK("ENTER, ap %p\n", ap);
324
325 writeb(QS_CTR0_CLER, chan + QS_CCT_CTR0);
326 wmb(); /* flush PRDs and pkt to memory */
327 writel(QS_CCF_RUN_PKT, chan + QS_CCT_CFF);
328 readl(chan + QS_CCT_CFF); /* flush */
329}
330
Tejun Heo9a3d9eb2006-01-23 13:09:36 +0900331static unsigned int qs_qc_issue(struct ata_queued_cmd *qc)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700332{
333 struct qs_port_priv *pp = qc->ap->private_data;
334
335 switch (qc->tf.protocol) {
336 case ATA_PROT_DMA:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700337 pp->state = qs_state_pkt;
338 qs_packet_start(qc);
339 return 0;
340
Tejun Heo0dc36882007-12-18 16:34:43 -0500341 case ATAPI_PROT_DMA:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700342 BUG();
343 break;
344
345 default:
346 break;
347 }
348
349 pp->state = qs_state_mmio;
Tejun Heo9363c382008-04-07 22:47:16 +0900350 return ata_sff_qc_issue(qc);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700351}
352
Mark Lord6004bda12007-11-07 10:54:15 -0500353static void qs_do_or_die(struct ata_queued_cmd *qc, u8 status)
354{
355 qc->err_mask |= ac_err_mask(status);
356
357 if (!qc->err_mask) {
358 ata_qc_complete(qc);
359 } else {
360 struct ata_port *ap = qc->ap;
361 struct ata_eh_info *ehi = &ap->link.eh_info;
362
363 ata_ehi_clear_desc(ehi);
364 ata_ehi_push_desc(ehi, "status 0x%02X", status);
365
366 if (qc->err_mask == AC_ERR_DEV)
367 ata_port_abort(ap);
368 else
369 ata_port_freeze(ap);
370 }
371}
372
Jeff Garzikcca39742006-08-24 03:19:22 -0400373static inline unsigned int qs_intr_pkt(struct ata_host *host)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700374{
375 unsigned int handled = 0;
376 u8 sFFE;
Tejun Heo0d5ff562007-02-01 15:06:36 +0900377 u8 __iomem *mmio_base = qs_mmio_base(host);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700378
379 do {
380 u32 sff0 = readl(mmio_base + QS_HST_SFF);
381 u32 sff1 = readl(mmio_base + QS_HST_SFF + 4);
382 u8 sEVLD = (sff1 >> 30) & 0x01; /* valid flag */
383 sFFE = sff1 >> 31; /* empty flag */
384
385 if (sEVLD) {
386 u8 sDST = sff0 >> 16; /* dev status */
387 u8 sHST = sff1 & 0x3f; /* host status */
388 unsigned int port_no = (sff1 >> 8) & 0x03;
Jeff Garzikcca39742006-08-24 03:19:22 -0400389 struct ata_port *ap = host->ports[port_no];
Tejun Heo3e4ec342010-05-10 21:41:30 +0200390 struct qs_port_priv *pp = ap->private_data;
391 struct ata_queued_cmd *qc;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700392
393 DPRINTK("SFF=%08x%08x: sCHAN=%u sHST=%d sDST=%02x\n",
394 sff1, sff0, port_no, sHST, sDST);
395 handled = 1;
Tejun Heo3e4ec342010-05-10 21:41:30 +0200396 if (!pp || pp->state != qs_state_pkt)
397 continue;
398 qc = ata_qc_from_tag(ap, ap->link.active_tag);
399 if (qc && (!(qc->tf.flags & ATA_TFLAG_POLLING))) {
400 switch (sHST) {
401 case 0: /* successful CPB */
402 case 3: /* device error */
403 qs_enter_reg_mode(qc->ap);
404 qs_do_or_die(qc, sDST);
405 break;
406 default:
407 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700408 }
409 }
410 }
411 } while (!sFFE);
412 return handled;
413}
414
Jeff Garzikcca39742006-08-24 03:19:22 -0400415static inline unsigned int qs_intr_mmio(struct ata_host *host)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700416{
417 unsigned int handled = 0, port_no;
418
Jeff Garzikcca39742006-08-24 03:19:22 -0400419 for (port_no = 0; port_no < host->n_ports; ++port_no) {
Tejun Heo3e4ec342010-05-10 21:41:30 +0200420 struct ata_port *ap = host->ports[port_no];
421 struct qs_port_priv *pp = ap->private_data;
422 struct ata_queued_cmd *qc;
423
424 qc = ata_qc_from_tag(ap, ap->link.active_tag);
425 if (!qc) {
426 /*
427 * The qstor hardware generates spurious
428 * interrupts from time to time when switching
429 * in and out of packet mode. There's no
430 * obvious way to know if we're here now due
431 * to that, so just ack the irq and pretend we
432 * knew it was ours.. (ugh). This does not
433 * affect packet mode.
434 */
435 ata_sff_check_status(ap);
436 handled = 1;
437 continue;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700438 }
Tejun Heo3e4ec342010-05-10 21:41:30 +0200439
440 if (!pp || pp->state != qs_state_mmio)
441 continue;
442 if (!(qc->tf.flags & ATA_TFLAG_POLLING))
Tejun Heoc3b28892010-05-19 22:10:21 +0200443 handled |= ata_sff_port_intr(ap, qc);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700444 }
445 return handled;
446}
447
David Howells7d12e782006-10-05 14:55:46 +0100448static irqreturn_t qs_intr(int irq, void *dev_instance)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700449{
Jeff Garzikcca39742006-08-24 03:19:22 -0400450 struct ata_host *host = dev_instance;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700451 unsigned int handled = 0;
Mark Lord904c7bad2007-11-07 10:53:41 -0500452 unsigned long flags;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700453
454 VPRINTK("ENTER\n");
455
Mark Lord904c7bad2007-11-07 10:53:41 -0500456 spin_lock_irqsave(&host->lock, flags);
Jeff Garzikcca39742006-08-24 03:19:22 -0400457 handled = qs_intr_pkt(host) | qs_intr_mmio(host);
Mark Lord904c7bad2007-11-07 10:53:41 -0500458 spin_unlock_irqrestore(&host->lock, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700459
460 VPRINTK("EXIT\n");
461
462 return IRQ_RETVAL(handled);
463}
464
Tejun Heo0d5ff562007-02-01 15:06:36 +0900465static void qs_ata_setup_port(struct ata_ioports *port, void __iomem *base)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700466{
467 port->cmd_addr =
468 port->data_addr = base + 0x400;
469 port->error_addr =
470 port->feature_addr = base + 0x408; /* hob_feature = 0x409 */
471 port->nsect_addr = base + 0x410; /* hob_nsect = 0x411 */
472 port->lbal_addr = base + 0x418; /* hob_lbal = 0x419 */
473 port->lbam_addr = base + 0x420; /* hob_lbam = 0x421 */
474 port->lbah_addr = base + 0x428; /* hob_lbah = 0x429 */
475 port->device_addr = base + 0x430;
476 port->status_addr =
477 port->command_addr = base + 0x438;
478 port->altstatus_addr =
479 port->ctl_addr = base + 0x440;
480 port->scr_addr = base + 0xc00;
481}
482
483static int qs_port_start(struct ata_port *ap)
484{
Jeff Garzikcca39742006-08-24 03:19:22 -0400485 struct device *dev = ap->host->dev;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700486 struct qs_port_priv *pp;
Tejun Heo0d5ff562007-02-01 15:06:36 +0900487 void __iomem *mmio_base = qs_mmio_base(ap->host);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700488 void __iomem *chan = mmio_base + (ap->port_no * 0x4000);
489 u64 addr;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700490
Tejun Heo24dc5f32007-01-20 16:00:28 +0900491 pp = devm_kzalloc(dev, sizeof(*pp), GFP_KERNEL);
492 if (!pp)
493 return -ENOMEM;
494 pp->pkt = dmam_alloc_coherent(dev, QS_PKT_BYTES, &pp->pkt_dma,
495 GFP_KERNEL);
496 if (!pp->pkt)
497 return -ENOMEM;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700498 memset(pp->pkt, 0, QS_PKT_BYTES);
499 ap->private_data = pp;
500
Mark Lord12ee7d32007-11-07 10:52:55 -0500501 qs_enter_reg_mode(ap);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700502 addr = (u64)pp->pkt_dma;
503 writel((u32) addr, chan + QS_CCF_CPBA);
504 writel((u32)(addr >> 32), chan + QS_CCF_CPBA + 4);
505 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700506}
507
Jeff Garzikcca39742006-08-24 03:19:22 -0400508static void qs_host_stop(struct ata_host *host)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700509{
Tejun Heo0d5ff562007-02-01 15:06:36 +0900510 void __iomem *mmio_base = qs_mmio_base(host);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700511
512 writeb(0, mmio_base + QS_HCT_CTRL); /* disable host interrupts */
513 writeb(QS_CNFG3_GSRST, mmio_base + QS_HCF_CNFG3); /* global reset */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700514}
515
Tejun Heo4447d352007-04-17 23:44:08 +0900516static void qs_host_init(struct ata_host *host, unsigned int chip_id)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700517{
Tejun Heo4447d352007-04-17 23:44:08 +0900518 void __iomem *mmio_base = host->iomap[QS_MMIO_BAR];
Linus Torvalds1da177e2005-04-16 15:20:36 -0700519 unsigned int port_no;
520
521 writeb(0, mmio_base + QS_HCT_CTRL); /* disable host interrupts */
522 writeb(QS_CNFG3_GSRST, mmio_base + QS_HCF_CNFG3); /* global reset */
523
524 /* reset each channel in turn */
Tejun Heo4447d352007-04-17 23:44:08 +0900525 for (port_no = 0; port_no < host->n_ports; ++port_no) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700526 u8 __iomem *chan = mmio_base + (port_no * 0x4000);
527 writeb(QS_CTR1_RDEV|QS_CTR1_RCHN, chan + QS_CCT_CTR1);
528 writeb(QS_CTR0_REG, chan + QS_CCT_CTR0);
529 readb(chan + QS_CCT_CTR0); /* flush */
530 }
531 writeb(QS_SERD3_PHY_ENA, mmio_base + QS_HVS_SERD3); /* enable phy */
532
Tejun Heo4447d352007-04-17 23:44:08 +0900533 for (port_no = 0; port_no < host->n_ports; ++port_no) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700534 u8 __iomem *chan = mmio_base + (port_no * 0x4000);
535 /* set FIFO depths to same settings as Windows driver */
536 writew(32, chan + QS_CFC_HUFT);
537 writew(32, chan + QS_CFC_HDFT);
538 writew(10, chan + QS_CFC_DUFT);
539 writew( 8, chan + QS_CFC_DDFT);
540 /* set CPB size in bytes, as a power of two */
541 writeb(QS_CPB_ORDER, chan + QS_CCF_CSEP);
542 }
543 writeb(1, mmio_base + QS_HCT_CTRL); /* enable host interrupts */
544}
545
546/*
547 * The QStor understands 64-bit buses, and uses 64-bit fields
548 * for DMA pointers regardless of bus width. We just have to
549 * make sure our DMA masks are set appropriately for whatever
550 * bridge lies between us and the QStor, and then the DMA mapping
551 * code will ensure we only ever "see" appropriate buffer addresses.
552 * If we're 32-bit limited somewhere, then our 64-bit fields will
553 * just end up with zeros in the upper 32-bits, without any special
554 * logic required outside of this routine (below).
555 */
556static int qs_set_dma_masks(struct pci_dev *pdev, void __iomem *mmio_base)
557{
558 u32 bus_info = readl(mmio_base + QS_HID_HPHY);
559 int rc, have_64bit_bus = (bus_info & QS_HPHY_64BIT);
560
561 if (have_64bit_bus &&
Yang Hongyang6a355282009-04-06 19:01:13 -0700562 !pci_set_dma_mask(pdev, DMA_BIT_MASK(64))) {
563 rc = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(64));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700564 if (rc) {
Yang Hongyang284901a2009-04-06 19:01:15 -0700565 rc = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700566 if (rc) {
Jeff Garzika9524a72005-10-30 14:39:11 -0500567 dev_printk(KERN_ERR, &pdev->dev,
568 "64-bit DMA enable failed\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700569 return rc;
570 }
571 }
572 } else {
Yang Hongyang284901a2009-04-06 19:01:15 -0700573 rc = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700574 if (rc) {
Jeff Garzika9524a72005-10-30 14:39:11 -0500575 dev_printk(KERN_ERR, &pdev->dev,
576 "32-bit DMA enable failed\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700577 return rc;
578 }
Yang Hongyang284901a2009-04-06 19:01:15 -0700579 rc = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700580 if (rc) {
Jeff Garzika9524a72005-10-30 14:39:11 -0500581 dev_printk(KERN_ERR, &pdev->dev,
582 "32-bit consistent DMA enable failed\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700583 return rc;
584 }
585 }
586 return 0;
587}
588
589static int qs_ata_init_one(struct pci_dev *pdev,
590 const struct pci_device_id *ent)
591{
592 static int printed_version;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700593 unsigned int board_idx = (unsigned int) ent->driver_data;
Tejun Heo4447d352007-04-17 23:44:08 +0900594 const struct ata_port_info *ppi[] = { &qs_port_info[board_idx], NULL };
595 struct ata_host *host;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700596 int rc, port_no;
597
598 if (!printed_version++)
Jeff Garzika9524a72005-10-30 14:39:11 -0500599 dev_printk(KERN_DEBUG, &pdev->dev, "version " DRV_VERSION "\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700600
Tejun Heo4447d352007-04-17 23:44:08 +0900601 /* alloc host */
602 host = ata_host_alloc_pinfo(&pdev->dev, ppi, QS_PORTS);
603 if (!host)
604 return -ENOMEM;
605
606 /* acquire resources and fill host */
Tejun Heo24dc5f32007-01-20 16:00:28 +0900607 rc = pcim_enable_device(pdev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700608 if (rc)
609 return rc;
610
Tejun Heo0d5ff562007-02-01 15:06:36 +0900611 if ((pci_resource_flags(pdev, QS_MMIO_BAR) & IORESOURCE_MEM) == 0)
Tejun Heo24dc5f32007-01-20 16:00:28 +0900612 return -ENODEV;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700613
Tejun Heo0d5ff562007-02-01 15:06:36 +0900614 rc = pcim_iomap_regions(pdev, 1 << QS_MMIO_BAR, DRV_NAME);
615 if (rc)
616 return rc;
Tejun Heo4447d352007-04-17 23:44:08 +0900617 host->iomap = pcim_iomap_table(pdev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700618
Tejun Heo4447d352007-04-17 23:44:08 +0900619 rc = qs_set_dma_masks(pdev, host->iomap[QS_MMIO_BAR]);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700620 if (rc)
Tejun Heo24dc5f32007-01-20 16:00:28 +0900621 return rc;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700622
Tejun Heo4447d352007-04-17 23:44:08 +0900623 for (port_no = 0; port_no < host->n_ports; ++port_no) {
Tejun Heocbcdd872007-08-18 13:14:55 +0900624 struct ata_port *ap = host->ports[port_no];
625 unsigned int offset = port_no * 0x4000;
626 void __iomem *chan = host->iomap[QS_MMIO_BAR] + offset;
627
628 qs_ata_setup_port(&ap->ioaddr, chan);
629
630 ata_port_pbar_desc(ap, QS_MMIO_BAR, -1, "mmio");
631 ata_port_pbar_desc(ap, QS_MMIO_BAR, offset, "port");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700632 }
633
Linus Torvalds1da177e2005-04-16 15:20:36 -0700634 /* initialize adapter */
Tejun Heo4447d352007-04-17 23:44:08 +0900635 qs_host_init(host, board_idx);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700636
Tejun Heo4447d352007-04-17 23:44:08 +0900637 pci_set_master(pdev);
638 return ata_host_activate(host, pdev->irq, qs_intr, IRQF_SHARED,
639 &qs_ata_sht);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700640}
641
642static int __init qs_ata_init(void)
643{
Pavel Roskinb7887192006-08-10 18:13:18 +0900644 return pci_register_driver(&qs_ata_pci_driver);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700645}
646
647static void __exit qs_ata_exit(void)
648{
649 pci_unregister_driver(&qs_ata_pci_driver);
650}
651
652MODULE_AUTHOR("Mark Lord");
653MODULE_DESCRIPTION("Pacific Digital Corporation QStor SATA low-level driver");
654MODULE_LICENSE("GPL");
655MODULE_DEVICE_TABLE(pci, qs_ata_pci_tbl);
656MODULE_VERSION(DRV_VERSION);
657
658module_init(qs_ata_init);
659module_exit(qs_ata_exit);