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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>
Linus Torvalds1da177e2005-04-16 15:20:36 -070034#include <linux/blkdev.h>
35#include <linux/delay.h>
36#include <linux/interrupt.h>
Jeff Garzika9524a72005-10-30 14:39:11 -050037#include <linux/device.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070038#include <scsi/scsi_host.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070039#include <linux/libata.h>
40
41#define DRV_NAME "sata_qstor"
Jeff Garzik2a3103c2007-08-31 04:54:06 -040042#define DRV_VERSION "0.09"
Linus Torvalds1da177e2005-04-16 15:20:36 -070043
44enum {
Tejun Heo0d5ff562007-02-01 15:06:36 +090045 QS_MMIO_BAR = 4,
46
Linus Torvalds1da177e2005-04-16 15:20:36 -070047 QS_PORTS = 4,
48 QS_MAX_PRD = LIBATA_MAX_PRD,
49 QS_CPB_ORDER = 6,
50 QS_CPB_BYTES = (1 << QS_CPB_ORDER),
51 QS_PRD_BYTES = QS_MAX_PRD * 16,
52 QS_PKT_BYTES = QS_CPB_BYTES + QS_PRD_BYTES,
53
Linus Torvalds1da177e2005-04-16 15:20:36 -070054 /* global register offsets */
55 QS_HCF_CNFG3 = 0x0003, /* host configuration offset */
56 QS_HID_HPHY = 0x0004, /* host physical interface info */
57 QS_HCT_CTRL = 0x00e4, /* global interrupt mask offset */
58 QS_HST_SFF = 0x0100, /* host status fifo offset */
59 QS_HVS_SERD3 = 0x0393, /* PHY enable offset */
60
61 /* global control bits */
62 QS_HPHY_64BIT = (1 << 1), /* 64-bit bus detected */
63 QS_CNFG3_GSRST = 0x01, /* global chip reset */
64 QS_SERD3_PHY_ENA = 0xf0, /* PHY detection ENAble*/
65
66 /* per-channel register offsets */
67 QS_CCF_CPBA = 0x0710, /* chan CPB base address */
68 QS_CCF_CSEP = 0x0718, /* chan CPB separation factor */
69 QS_CFC_HUFT = 0x0800, /* host upstream fifo threshold */
70 QS_CFC_HDFT = 0x0804, /* host downstream fifo threshold */
71 QS_CFC_DUFT = 0x0808, /* dev upstream fifo threshold */
72 QS_CFC_DDFT = 0x080c, /* dev downstream fifo threshold */
73 QS_CCT_CTR0 = 0x0900, /* chan control-0 offset */
74 QS_CCT_CTR1 = 0x0901, /* chan control-1 offset */
75 QS_CCT_CFF = 0x0a00, /* chan command fifo offset */
76
77 /* channel control bits */
78 QS_CTR0_REG = (1 << 1), /* register mode (vs. pkt mode) */
79 QS_CTR0_CLER = (1 << 2), /* clear channel errors */
80 QS_CTR1_RDEV = (1 << 1), /* sata phy/comms reset */
81 QS_CTR1_RCHN = (1 << 4), /* reset channel logic */
82 QS_CCF_RUN_PKT = 0x107, /* RUN a new dma PKT */
83
84 /* pkt sub-field headers */
85 QS_HCB_HDR = 0x01, /* Host Control Block header */
86 QS_DCB_HDR = 0x02, /* Device Control Block header */
87
88 /* pkt HCB flag bits */
89 QS_HF_DIRO = (1 << 0), /* data DIRection Out */
90 QS_HF_DAT = (1 << 3), /* DATa pkt */
91 QS_HF_IEN = (1 << 4), /* Interrupt ENable */
92 QS_HF_VLD = (1 << 5), /* VaLiD pkt */
93
94 /* pkt DCB flag bits */
95 QS_DF_PORD = (1 << 2), /* Pio OR Dma */
96 QS_DF_ELBA = (1 << 3), /* Extended LBA (lba48) */
97
98 /* PCI device IDs */
99 board_2068_idx = 0, /* QStor 4-port SATA/RAID */
100};
101
Al Viro0420dd12005-10-21 06:46:02 +0100102enum {
103 QS_DMA_BOUNDARY = ~0UL
104};
105
Mark Lord12ee7d32007-11-07 10:52:55 -0500106typedef enum { qs_state_mmio, qs_state_pkt } qs_state_t;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700107
108struct qs_port_priv {
109 u8 *pkt;
110 dma_addr_t pkt_dma;
111 qs_state_t state;
112};
113
Tejun Heo82ef04f2008-07-31 17:02:40 +0900114static int qs_scr_read(struct ata_link *link, unsigned int sc_reg, u32 *val);
115static int qs_scr_write(struct ata_link *link, unsigned int sc_reg, u32 val);
Jeff Garzik5796d1c2007-10-26 00:03:37 -0400116static int qs_ata_init_one(struct pci_dev *pdev, const struct pci_device_id *ent);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700117static int qs_port_start(struct ata_port *ap);
Jeff Garzikcca39742006-08-24 03:19:22 -0400118static void qs_host_stop(struct ata_host *host);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700119static void qs_qc_prep(struct ata_queued_cmd *qc);
Tejun Heo9a3d9eb2006-01-23 13:09:36 +0900120static unsigned int qs_qc_issue(struct ata_queued_cmd *qc);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700121static int qs_check_atapi_dma(struct ata_queued_cmd *qc);
Mark Lord6004bda12007-11-07 10:54:15 -0500122static void qs_freeze(struct ata_port *ap);
123static void qs_thaw(struct ata_port *ap);
Tejun Heoa1efdab2008-03-25 12:22:50 +0900124static int qs_prereset(struct ata_link *link, unsigned long deadline);
Mark Lord6004bda12007-11-07 10:54:15 -0500125static void qs_error_handler(struct ata_port *ap);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700126
Jeff Garzik193515d2005-11-07 00:59:37 -0500127static struct scsi_host_template qs_ata_sht = {
Tejun Heo68d1d072008-03-25 12:22:49 +0900128 ATA_BASE_SHT(DRV_NAME),
Linus Torvalds1da177e2005-04-16 15:20:36 -0700129 .sg_tablesize = QS_MAX_PRD,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700130 .dma_boundary = QS_DMA_BOUNDARY,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700131};
132
Tejun Heo029cfd62008-03-25 12:22:49 +0900133static struct ata_port_operations qs_ata_ops = {
134 .inherits = &ata_sff_port_ops,
135
Linus Torvalds1da177e2005-04-16 15:20:36 -0700136 .check_atapi_dma = qs_check_atapi_dma,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700137 .qc_prep = qs_qc_prep,
138 .qc_issue = qs_qc_issue,
Tejun Heo029cfd62008-03-25 12:22:49 +0900139
Mark Lord6004bda12007-11-07 10:54:15 -0500140 .freeze = qs_freeze,
141 .thaw = qs_thaw,
Tejun Heoa1efdab2008-03-25 12:22:50 +0900142 .prereset = qs_prereset,
143 .softreset = ATA_OP_NULL,
Mark Lord6004bda12007-11-07 10:54:15 -0500144 .error_handler = qs_error_handler,
Alan Coxc96f1732009-03-24 10:23:46 +0000145 .lost_interrupt = ATA_OP_NULL,
Tejun Heo029cfd62008-03-25 12:22:49 +0900146
Linus Torvalds1da177e2005-04-16 15:20:36 -0700147 .scr_read = qs_scr_read,
148 .scr_write = qs_scr_write,
Tejun Heo029cfd62008-03-25 12:22:49 +0900149
Linus Torvalds1da177e2005-04-16 15:20:36 -0700150 .port_start = qs_port_start,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700151 .host_stop = qs_host_stop,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700152};
153
Arjan van de Ven98ac62d2005-11-28 10:06:23 +0100154static const struct ata_port_info qs_port_info[] = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700155 /* board_2068_idx */
156 {
Sergei Shtylyov9cbe0562011-02-04 22:05:48 +0300157 .flags = ATA_FLAG_SATA | ATA_FLAG_PIO_POLLING,
Erik Inge Bolsø14bdef92009-03-14 21:38:24 +0100158 .pio_mask = ATA_PIO4_ONLY,
Jeff Garzikbf6263a2007-07-09 12:16:50 -0400159 .udma_mask = ATA_UDMA6,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700160 .port_ops = &qs_ata_ops,
161 },
162};
163
Jeff Garzik3b7d6972005-11-10 11:04:11 -0500164static const struct pci_device_id qs_ata_pci_tbl[] = {
Jeff Garzik2d2744f2006-09-28 20:21:59 -0400165 { PCI_VDEVICE(PDC, 0x2068), board_2068_idx },
Linus Torvalds1da177e2005-04-16 15:20:36 -0700166
167 { } /* terminate list */
168};
169
170static struct pci_driver qs_ata_pci_driver = {
171 .name = DRV_NAME,
172 .id_table = qs_ata_pci_tbl,
173 .probe = qs_ata_init_one,
174 .remove = ata_pci_remove_one,
175};
176
Tejun Heo0d5ff562007-02-01 15:06:36 +0900177static void __iomem *qs_mmio_base(struct ata_host *host)
178{
179 return host->iomap[QS_MMIO_BAR];
180}
181
Linus Torvalds1da177e2005-04-16 15:20:36 -0700182static int qs_check_atapi_dma(struct ata_queued_cmd *qc)
183{
184 return 1; /* ATAPI DMA not supported */
185}
186
Linus Torvalds1da177e2005-04-16 15:20:36 -0700187static inline void qs_enter_reg_mode(struct ata_port *ap)
188{
Tejun Heo0d5ff562007-02-01 15:06:36 +0900189 u8 __iomem *chan = qs_mmio_base(ap->host) + (ap->port_no * 0x4000);
Mark Lord12ee7d32007-11-07 10:52:55 -0500190 struct qs_port_priv *pp = ap->private_data;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700191
Mark Lord12ee7d32007-11-07 10:52:55 -0500192 pp->state = qs_state_mmio;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700193 writeb(QS_CTR0_REG, chan + QS_CCT_CTR0);
194 readb(chan + QS_CCT_CTR0); /* flush */
195}
196
197static inline void qs_reset_channel_logic(struct ata_port *ap)
198{
Tejun Heo0d5ff562007-02-01 15:06:36 +0900199 u8 __iomem *chan = qs_mmio_base(ap->host) + (ap->port_no * 0x4000);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700200
201 writeb(QS_CTR1_RCHN, chan + QS_CCT_CTR1);
202 readb(chan + QS_CCT_CTR0); /* flush */
203 qs_enter_reg_mode(ap);
204}
205
Mark Lord6004bda12007-11-07 10:54:15 -0500206static void qs_freeze(struct ata_port *ap)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700207{
Mark Lord6004bda12007-11-07 10:54:15 -0500208 u8 __iomem *mmio_base = qs_mmio_base(ap->host);
209
210 writeb(0, mmio_base + QS_HCT_CTRL); /* disable host interrupts */
211 qs_enter_reg_mode(ap);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700212}
213
Mark Lord6004bda12007-11-07 10:54:15 -0500214static void qs_thaw(struct ata_port *ap)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700215{
Mark Lord6004bda12007-11-07 10:54:15 -0500216 u8 __iomem *mmio_base = qs_mmio_base(ap->host);
217
218 qs_enter_reg_mode(ap);
219 writeb(1, mmio_base + QS_HCT_CTRL); /* enable host interrupts */
220}
221
222static int qs_prereset(struct ata_link *link, unsigned long deadline)
223{
224 struct ata_port *ap = link->ap;
225
Linus Torvalds1da177e2005-04-16 15:20:36 -0700226 qs_reset_channel_logic(ap);
Tejun Heo9363c382008-04-07 22:47:16 +0900227 return ata_sff_prereset(link, deadline);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700228}
229
Tejun Heo82ef04f2008-07-31 17:02:40 +0900230static int qs_scr_read(struct ata_link *link, unsigned int sc_reg, u32 *val)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700231{
232 if (sc_reg > SCR_CONTROL)
Tejun Heoda3dbb12007-07-16 14:29:40 +0900233 return -EINVAL;
Tejun Heo82ef04f2008-07-31 17:02:40 +0900234 *val = readl(link->ap->ioaddr.scr_addr + (sc_reg * 8));
Tejun Heoda3dbb12007-07-16 14:29:40 +0900235 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700236}
237
Mark Lord6004bda12007-11-07 10:54:15 -0500238static void qs_error_handler(struct ata_port *ap)
239{
240 qs_enter_reg_mode(ap);
Tejun Heofe06e5f2010-05-10 21:41:39 +0200241 ata_sff_error_handler(ap);
Mark Lord6004bda12007-11-07 10:54:15 -0500242}
243
Tejun Heo82ef04f2008-07-31 17:02:40 +0900244static int qs_scr_write(struct ata_link *link, unsigned int sc_reg, u32 val)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700245{
246 if (sc_reg > SCR_CONTROL)
Tejun Heoda3dbb12007-07-16 14:29:40 +0900247 return -EINVAL;
Tejun Heo82ef04f2008-07-31 17:02:40 +0900248 writel(val, link->ap->ioaddr.scr_addr + (sc_reg * 8));
Tejun Heoda3dbb12007-07-16 14:29:40 +0900249 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700250}
251
Jeff Garzik828d09d2005-11-12 01:27:07 -0500252static unsigned int qs_fill_sg(struct ata_queued_cmd *qc)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700253{
Jeff Garzikcedc9a42005-10-05 07:13:30 -0400254 struct scatterlist *sg;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700255 struct ata_port *ap = qc->ap;
256 struct qs_port_priv *pp = ap->private_data;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700257 u8 *prd = pp->pkt + QS_CPB_BYTES;
Tejun Heoff2aeb12007-12-05 16:43:11 +0900258 unsigned int si;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700259
Tejun Heoff2aeb12007-12-05 16:43:11 +0900260 for_each_sg(qc->sg, sg, qc->n_elem, si) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700261 u64 addr;
262 u32 len;
263
264 addr = sg_dma_address(sg);
265 *(__le64 *)prd = cpu_to_le64(addr);
266 prd += sizeof(u64);
267
268 len = sg_dma_len(sg);
269 *(__le32 *)prd = cpu_to_le32(len);
270 prd += sizeof(u64);
271
Tejun Heoff2aeb12007-12-05 16:43:11 +0900272 VPRINTK("PRD[%u] = (0x%llX, 0x%X)\n", si,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700273 (unsigned long long)addr, len);
274 }
Jeff Garzik828d09d2005-11-12 01:27:07 -0500275
Tejun Heoff2aeb12007-12-05 16:43:11 +0900276 return si;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700277}
278
279static void qs_qc_prep(struct ata_queued_cmd *qc)
280{
281 struct qs_port_priv *pp = qc->ap->private_data;
282 u8 dflags = QS_DF_PORD, *buf = pp->pkt;
283 u8 hflags = QS_HF_DAT | QS_HF_IEN | QS_HF_VLD;
284 u64 addr;
Jeff Garzik828d09d2005-11-12 01:27:07 -0500285 unsigned int nelem;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700286
287 VPRINTK("ENTER\n");
288
289 qs_enter_reg_mode(qc->ap);
Tejun Heof47451c2010-05-10 21:41:40 +0200290 if (qc->tf.protocol != ATA_PROT_DMA)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700291 return;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700292
Jeff Garzik828d09d2005-11-12 01:27:07 -0500293 nelem = qs_fill_sg(qc);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700294
295 if ((qc->tf.flags & ATA_TFLAG_WRITE))
296 hflags |= QS_HF_DIRO;
297 if ((qc->tf.flags & ATA_TFLAG_LBA48))
298 dflags |= QS_DF_ELBA;
299
300 /* host control block (HCB) */
301 buf[ 0] = QS_HCB_HDR;
302 buf[ 1] = hflags;
Tejun Heo726f0782007-01-03 17:30:39 +0900303 *(__le32 *)(&buf[ 4]) = cpu_to_le32(qc->nbytes);
Jeff Garzik828d09d2005-11-12 01:27:07 -0500304 *(__le32 *)(&buf[ 8]) = cpu_to_le32(nelem);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700305 addr = ((u64)pp->pkt_dma) + QS_CPB_BYTES;
306 *(__le64 *)(&buf[16]) = cpu_to_le64(addr);
307
308 /* device control block (DCB) */
309 buf[24] = QS_DCB_HDR;
310 buf[28] = dflags;
311
312 /* frame information structure (FIS) */
Tejun Heo99771262007-07-16 14:29:38 +0900313 ata_tf_to_fis(&qc->tf, 0, 1, &buf[32]);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700314}
315
316static inline void qs_packet_start(struct ata_queued_cmd *qc)
317{
318 struct ata_port *ap = qc->ap;
Tejun Heo0d5ff562007-02-01 15:06:36 +0900319 u8 __iomem *chan = qs_mmio_base(ap->host) + (ap->port_no * 0x4000);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700320
321 VPRINTK("ENTER, ap %p\n", ap);
322
323 writeb(QS_CTR0_CLER, chan + QS_CCT_CTR0);
324 wmb(); /* flush PRDs and pkt to memory */
325 writel(QS_CCF_RUN_PKT, chan + QS_CCT_CFF);
326 readl(chan + QS_CCT_CFF); /* flush */
327}
328
Tejun Heo9a3d9eb2006-01-23 13:09:36 +0900329static unsigned int qs_qc_issue(struct ata_queued_cmd *qc)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700330{
331 struct qs_port_priv *pp = qc->ap->private_data;
332
333 switch (qc->tf.protocol) {
334 case ATA_PROT_DMA:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700335 pp->state = qs_state_pkt;
336 qs_packet_start(qc);
337 return 0;
338
Tejun Heo0dc36882007-12-18 16:34:43 -0500339 case ATAPI_PROT_DMA:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700340 BUG();
341 break;
342
343 default:
344 break;
345 }
346
347 pp->state = qs_state_mmio;
Tejun Heo9363c382008-04-07 22:47:16 +0900348 return ata_sff_qc_issue(qc);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700349}
350
Mark Lord6004bda12007-11-07 10:54:15 -0500351static void qs_do_or_die(struct ata_queued_cmd *qc, u8 status)
352{
353 qc->err_mask |= ac_err_mask(status);
354
355 if (!qc->err_mask) {
356 ata_qc_complete(qc);
357 } else {
358 struct ata_port *ap = qc->ap;
359 struct ata_eh_info *ehi = &ap->link.eh_info;
360
361 ata_ehi_clear_desc(ehi);
362 ata_ehi_push_desc(ehi, "status 0x%02X", status);
363
364 if (qc->err_mask == AC_ERR_DEV)
365 ata_port_abort(ap);
366 else
367 ata_port_freeze(ap);
368 }
369}
370
Jeff Garzikcca39742006-08-24 03:19:22 -0400371static inline unsigned int qs_intr_pkt(struct ata_host *host)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700372{
373 unsigned int handled = 0;
374 u8 sFFE;
Tejun Heo0d5ff562007-02-01 15:06:36 +0900375 u8 __iomem *mmio_base = qs_mmio_base(host);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700376
377 do {
378 u32 sff0 = readl(mmio_base + QS_HST_SFF);
379 u32 sff1 = readl(mmio_base + QS_HST_SFF + 4);
380 u8 sEVLD = (sff1 >> 30) & 0x01; /* valid flag */
381 sFFE = sff1 >> 31; /* empty flag */
382
383 if (sEVLD) {
384 u8 sDST = sff0 >> 16; /* dev status */
385 u8 sHST = sff1 & 0x3f; /* host status */
386 unsigned int port_no = (sff1 >> 8) & 0x03;
Jeff Garzikcca39742006-08-24 03:19:22 -0400387 struct ata_port *ap = host->ports[port_no];
Tejun Heo3e4ec342010-05-10 21:41:30 +0200388 struct qs_port_priv *pp = ap->private_data;
389 struct ata_queued_cmd *qc;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700390
391 DPRINTK("SFF=%08x%08x: sCHAN=%u sHST=%d sDST=%02x\n",
392 sff1, sff0, port_no, sHST, sDST);
393 handled = 1;
Tejun Heo3e4ec342010-05-10 21:41:30 +0200394 if (!pp || pp->state != qs_state_pkt)
395 continue;
396 qc = ata_qc_from_tag(ap, ap->link.active_tag);
397 if (qc && (!(qc->tf.flags & ATA_TFLAG_POLLING))) {
398 switch (sHST) {
399 case 0: /* successful CPB */
400 case 3: /* device error */
401 qs_enter_reg_mode(qc->ap);
402 qs_do_or_die(qc, sDST);
403 break;
404 default:
405 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700406 }
407 }
408 }
409 } while (!sFFE);
410 return handled;
411}
412
Jeff Garzikcca39742006-08-24 03:19:22 -0400413static inline unsigned int qs_intr_mmio(struct ata_host *host)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700414{
415 unsigned int handled = 0, port_no;
416
Jeff Garzikcca39742006-08-24 03:19:22 -0400417 for (port_no = 0; port_no < host->n_ports; ++port_no) {
Tejun Heo3e4ec342010-05-10 21:41:30 +0200418 struct ata_port *ap = host->ports[port_no];
419 struct qs_port_priv *pp = ap->private_data;
420 struct ata_queued_cmd *qc;
421
422 qc = ata_qc_from_tag(ap, ap->link.active_tag);
423 if (!qc) {
424 /*
425 * The qstor hardware generates spurious
426 * interrupts from time to time when switching
427 * in and out of packet mode. There's no
428 * obvious way to know if we're here now due
429 * to that, so just ack the irq and pretend we
430 * knew it was ours.. (ugh). This does not
431 * affect packet mode.
432 */
433 ata_sff_check_status(ap);
434 handled = 1;
435 continue;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700436 }
Tejun Heo3e4ec342010-05-10 21:41:30 +0200437
438 if (!pp || pp->state != qs_state_mmio)
439 continue;
440 if (!(qc->tf.flags & ATA_TFLAG_POLLING))
Tejun Heoc3b28892010-05-19 22:10:21 +0200441 handled |= ata_sff_port_intr(ap, qc);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700442 }
443 return handled;
444}
445
David Howells7d12e782006-10-05 14:55:46 +0100446static irqreturn_t qs_intr(int irq, void *dev_instance)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700447{
Jeff Garzikcca39742006-08-24 03:19:22 -0400448 struct ata_host *host = dev_instance;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700449 unsigned int handled = 0;
Mark Lord904c7ba2007-11-07 10:53:41 -0500450 unsigned long flags;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700451
452 VPRINTK("ENTER\n");
453
Mark Lord904c7ba2007-11-07 10:53:41 -0500454 spin_lock_irqsave(&host->lock, flags);
Jeff Garzikcca39742006-08-24 03:19:22 -0400455 handled = qs_intr_pkt(host) | qs_intr_mmio(host);
Mark Lord904c7ba2007-11-07 10:53:41 -0500456 spin_unlock_irqrestore(&host->lock, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700457
458 VPRINTK("EXIT\n");
459
460 return IRQ_RETVAL(handled);
461}
462
Tejun Heo0d5ff562007-02-01 15:06:36 +0900463static void qs_ata_setup_port(struct ata_ioports *port, void __iomem *base)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700464{
465 port->cmd_addr =
466 port->data_addr = base + 0x400;
467 port->error_addr =
468 port->feature_addr = base + 0x408; /* hob_feature = 0x409 */
469 port->nsect_addr = base + 0x410; /* hob_nsect = 0x411 */
470 port->lbal_addr = base + 0x418; /* hob_lbal = 0x419 */
471 port->lbam_addr = base + 0x420; /* hob_lbam = 0x421 */
472 port->lbah_addr = base + 0x428; /* hob_lbah = 0x429 */
473 port->device_addr = base + 0x430;
474 port->status_addr =
475 port->command_addr = base + 0x438;
476 port->altstatus_addr =
477 port->ctl_addr = base + 0x440;
478 port->scr_addr = base + 0xc00;
479}
480
481static int qs_port_start(struct ata_port *ap)
482{
Jeff Garzikcca39742006-08-24 03:19:22 -0400483 struct device *dev = ap->host->dev;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700484 struct qs_port_priv *pp;
Tejun Heo0d5ff562007-02-01 15:06:36 +0900485 void __iomem *mmio_base = qs_mmio_base(ap->host);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700486 void __iomem *chan = mmio_base + (ap->port_no * 0x4000);
487 u64 addr;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700488
Tejun Heo24dc5f32007-01-20 16:00:28 +0900489 pp = devm_kzalloc(dev, sizeof(*pp), GFP_KERNEL);
490 if (!pp)
491 return -ENOMEM;
492 pp->pkt = dmam_alloc_coherent(dev, QS_PKT_BYTES, &pp->pkt_dma,
493 GFP_KERNEL);
494 if (!pp->pkt)
495 return -ENOMEM;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700496 memset(pp->pkt, 0, QS_PKT_BYTES);
497 ap->private_data = pp;
498
Mark Lord12ee7d32007-11-07 10:52:55 -0500499 qs_enter_reg_mode(ap);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700500 addr = (u64)pp->pkt_dma;
501 writel((u32) addr, chan + QS_CCF_CPBA);
502 writel((u32)(addr >> 32), chan + QS_CCF_CPBA + 4);
503 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700504}
505
Jeff Garzikcca39742006-08-24 03:19:22 -0400506static void qs_host_stop(struct ata_host *host)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700507{
Tejun Heo0d5ff562007-02-01 15:06:36 +0900508 void __iomem *mmio_base = qs_mmio_base(host);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700509
510 writeb(0, mmio_base + QS_HCT_CTRL); /* disable host interrupts */
511 writeb(QS_CNFG3_GSRST, mmio_base + QS_HCF_CNFG3); /* global reset */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700512}
513
Tejun Heo4447d352007-04-17 23:44:08 +0900514static void qs_host_init(struct ata_host *host, unsigned int chip_id)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700515{
Tejun Heo4447d352007-04-17 23:44:08 +0900516 void __iomem *mmio_base = host->iomap[QS_MMIO_BAR];
Linus Torvalds1da177e2005-04-16 15:20:36 -0700517 unsigned int port_no;
518
519 writeb(0, mmio_base + QS_HCT_CTRL); /* disable host interrupts */
520 writeb(QS_CNFG3_GSRST, mmio_base + QS_HCF_CNFG3); /* global reset */
521
522 /* reset each channel in turn */
Tejun Heo4447d352007-04-17 23:44:08 +0900523 for (port_no = 0; port_no < host->n_ports; ++port_no) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700524 u8 __iomem *chan = mmio_base + (port_no * 0x4000);
525 writeb(QS_CTR1_RDEV|QS_CTR1_RCHN, chan + QS_CCT_CTR1);
526 writeb(QS_CTR0_REG, chan + QS_CCT_CTR0);
527 readb(chan + QS_CCT_CTR0); /* flush */
528 }
529 writeb(QS_SERD3_PHY_ENA, mmio_base + QS_HVS_SERD3); /* enable phy */
530
Tejun Heo4447d352007-04-17 23:44:08 +0900531 for (port_no = 0; port_no < host->n_ports; ++port_no) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700532 u8 __iomem *chan = mmio_base + (port_no * 0x4000);
533 /* set FIFO depths to same settings as Windows driver */
534 writew(32, chan + QS_CFC_HUFT);
535 writew(32, chan + QS_CFC_HDFT);
536 writew(10, chan + QS_CFC_DUFT);
537 writew( 8, chan + QS_CFC_DDFT);
538 /* set CPB size in bytes, as a power of two */
539 writeb(QS_CPB_ORDER, chan + QS_CCF_CSEP);
540 }
541 writeb(1, mmio_base + QS_HCT_CTRL); /* enable host interrupts */
542}
543
544/*
545 * The QStor understands 64-bit buses, and uses 64-bit fields
546 * for DMA pointers regardless of bus width. We just have to
547 * make sure our DMA masks are set appropriately for whatever
548 * bridge lies between us and the QStor, and then the DMA mapping
549 * code will ensure we only ever "see" appropriate buffer addresses.
550 * If we're 32-bit limited somewhere, then our 64-bit fields will
551 * just end up with zeros in the upper 32-bits, without any special
552 * logic required outside of this routine (below).
553 */
554static int qs_set_dma_masks(struct pci_dev *pdev, void __iomem *mmio_base)
555{
556 u32 bus_info = readl(mmio_base + QS_HID_HPHY);
557 int rc, have_64bit_bus = (bus_info & QS_HPHY_64BIT);
558
559 if (have_64bit_bus &&
Yang Hongyang6a355282009-04-06 19:01:13 -0700560 !pci_set_dma_mask(pdev, DMA_BIT_MASK(64))) {
561 rc = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(64));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700562 if (rc) {
Yang Hongyang284901a2009-04-06 19:01:15 -0700563 rc = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700564 if (rc) {
Joe Perchesa44fec12011-04-15 15:51:58 -0700565 dev_err(&pdev->dev,
566 "64-bit DMA enable failed\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700567 return rc;
568 }
569 }
570 } else {
Yang Hongyang284901a2009-04-06 19:01:15 -0700571 rc = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700572 if (rc) {
Joe Perchesa44fec12011-04-15 15:51:58 -0700573 dev_err(&pdev->dev, "32-bit DMA enable failed\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700574 return rc;
575 }
Yang Hongyang284901a2009-04-06 19:01:15 -0700576 rc = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700577 if (rc) {
Joe Perchesa44fec12011-04-15 15:51:58 -0700578 dev_err(&pdev->dev,
Jeff Garzika9524a72005-10-30 14:39:11 -0500579 "32-bit consistent DMA enable failed\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700580 return rc;
581 }
582 }
583 return 0;
584}
585
586static int qs_ata_init_one(struct pci_dev *pdev,
587 const struct pci_device_id *ent)
588{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700589 unsigned int board_idx = (unsigned int) ent->driver_data;
Tejun Heo4447d352007-04-17 23:44:08 +0900590 const struct ata_port_info *ppi[] = { &qs_port_info[board_idx], NULL };
591 struct ata_host *host;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700592 int rc, port_no;
593
Joe Perches06296a12011-04-15 15:52:00 -0700594 ata_print_version_once(&pdev->dev, DRV_VERSION);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700595
Tejun Heo4447d352007-04-17 23:44:08 +0900596 /* alloc host */
597 host = ata_host_alloc_pinfo(&pdev->dev, ppi, QS_PORTS);
598 if (!host)
599 return -ENOMEM;
600
601 /* acquire resources and fill host */
Tejun Heo24dc5f32007-01-20 16:00:28 +0900602 rc = pcim_enable_device(pdev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700603 if (rc)
604 return rc;
605
Tejun Heo0d5ff562007-02-01 15:06:36 +0900606 if ((pci_resource_flags(pdev, QS_MMIO_BAR) & IORESOURCE_MEM) == 0)
Tejun Heo24dc5f32007-01-20 16:00:28 +0900607 return -ENODEV;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700608
Tejun Heo0d5ff562007-02-01 15:06:36 +0900609 rc = pcim_iomap_regions(pdev, 1 << QS_MMIO_BAR, DRV_NAME);
610 if (rc)
611 return rc;
Tejun Heo4447d352007-04-17 23:44:08 +0900612 host->iomap = pcim_iomap_table(pdev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700613
Tejun Heo4447d352007-04-17 23:44:08 +0900614 rc = qs_set_dma_masks(pdev, host->iomap[QS_MMIO_BAR]);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700615 if (rc)
Tejun Heo24dc5f32007-01-20 16:00:28 +0900616 return rc;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700617
Tejun Heo4447d352007-04-17 23:44:08 +0900618 for (port_no = 0; port_no < host->n_ports; ++port_no) {
Tejun Heocbcdd872007-08-18 13:14:55 +0900619 struct ata_port *ap = host->ports[port_no];
620 unsigned int offset = port_no * 0x4000;
621 void __iomem *chan = host->iomap[QS_MMIO_BAR] + offset;
622
623 qs_ata_setup_port(&ap->ioaddr, chan);
624
625 ata_port_pbar_desc(ap, QS_MMIO_BAR, -1, "mmio");
626 ata_port_pbar_desc(ap, QS_MMIO_BAR, offset, "port");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700627 }
628
Linus Torvalds1da177e2005-04-16 15:20:36 -0700629 /* initialize adapter */
Tejun Heo4447d352007-04-17 23:44:08 +0900630 qs_host_init(host, board_idx);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700631
Tejun Heo4447d352007-04-17 23:44:08 +0900632 pci_set_master(pdev);
633 return ata_host_activate(host, pdev->irq, qs_intr, IRQF_SHARED,
634 &qs_ata_sht);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700635}
636
Axel Lin2fc75da2012-04-19 13:43:05 +0800637module_pci_driver(qs_ata_pci_driver);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700638
639MODULE_AUTHOR("Mark Lord");
640MODULE_DESCRIPTION("Pacific Digital Corporation QStor SATA low-level driver");
641MODULE_LICENSE("GPL");
642MODULE_DEVICE_TABLE(pci, qs_ata_pci_tbl);
643MODULE_VERSION(DRV_VERSION);