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authorBrett Russ <russb@emc.com>2005-09-01 18:26:17 -0400
committerJeff Garzik <jgarzik@pobox.com>2005-09-07 01:56:09 -0400
commit20f733e7d75a16bffc34842b7682c9247dd5f954 (patch)
tree6d67e9dbcbc615d00881f466b0ad2b9fc1349e00 /drivers/scsi/sata_mv.c
parent7da79312830e6d9b3f6ee06b86c3a35caba2f6e7 (diff)
[PATCH] libata: Marvell SATA support (PIO mode)
This is my libata compatible low level driver for the Marvell SATA family. Currently it successfully runs in PIO mode on a 6081 chip. EDMA support is in the works and should be done shortly. Review, testing (especially on other flavors of Marvell), comments welcome. Signed-off-by: Brett Russ <russb@emc.com> Signed-off-by: Jeff Garzik <jgarzik@pobox.com>
Diffstat (limited to 'drivers/scsi/sata_mv.c')
-rw-r--r--drivers/scsi/sata_mv.c827
1 files changed, 827 insertions, 0 deletions
diff --git a/drivers/scsi/sata_mv.c b/drivers/scsi/sata_mv.c
new file mode 100644
index 000000000000..ea76fe44585e
--- /dev/null
+++ b/drivers/scsi/sata_mv.c
@@ -0,0 +1,827 @@
1/*
2 * sata_mv.c - Marvell SATA support
3 *
4 * Copyright 2005: EMC Corporation, all rights reserved.
5 *
6 * Please ALWAYS copy linux-ide@vger.kernel.org on emails.
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; version 2 of the License.
11 *
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
16 *
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, write to the Free Software
19 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
20 *
21 */
22
23#include <linux/kernel.h>
24#include <linux/module.h>
25#include <linux/pci.h>
26#include <linux/init.h>
27#include <linux/blkdev.h>
28#include <linux/delay.h>
29#include <linux/interrupt.h>
30#include <linux/sched.h>
31#include <linux/dma-mapping.h>
32#include "scsi.h"
33#include <scsi/scsi_host.h>
34#include <linux/libata.h>
35#include <asm/io.h>
36
37#define DRV_NAME "sata_mv"
38#define DRV_VERSION "0.12"
39
40enum {
41 /* BAR's are enumerated in terms of pci_resource_start() terms */
42 MV_PRIMARY_BAR = 0, /* offset 0x10: memory space */
43 MV_IO_BAR = 2, /* offset 0x18: IO space */
44 MV_MISC_BAR = 3, /* offset 0x1c: FLASH, NVRAM, SRAM */
45
46 MV_MAJOR_REG_AREA_SZ = 0x10000, /* 64KB */
47 MV_MINOR_REG_AREA_SZ = 0x2000, /* 8KB */
48
49 MV_PCI_REG_BASE = 0,
50 MV_IRQ_COAL_REG_BASE = 0x18000, /* 6xxx part only */
51 MV_SATAHC0_REG_BASE = 0x20000,
52
53 MV_PCI_REG_SZ = MV_MAJOR_REG_AREA_SZ,
54 MV_SATAHC_REG_SZ = MV_MAJOR_REG_AREA_SZ,
55 MV_SATAHC_ARBTR_REG_SZ = MV_MINOR_REG_AREA_SZ, /* arbiter */
56 MV_PORT_REG_SZ = MV_MINOR_REG_AREA_SZ,
57
58 MV_Q_CT = 32,
59 MV_CRQB_SZ = 32,
60 MV_CRPB_SZ = 8,
61
62 MV_DMA_BOUNDARY = 0xffffffffU,
63 SATAHC_MASK = (~(MV_SATAHC_REG_SZ - 1)),
64
65 MV_PORTS_PER_HC = 4,
66 /* == (port / MV_PORTS_PER_HC) to determine HC from 0-7 port */
67 MV_PORT_HC_SHIFT = 2,
68 /* == (port % MV_PORTS_PER_HC) to determine port from 0-7 port */
69 MV_PORT_MASK = 3,
70
71 /* Host Flags */
72 MV_FLAG_DUAL_HC = (1 << 30), /* two SATA Host Controllers */
73 MV_FLAG_IRQ_COALESCE = (1 << 29), /* IRQ coalescing capability */
74 MV_FLAG_BDMA = (1 << 28), /* Basic DMA */
75
76 chip_504x = 0,
77 chip_508x = 1,
78 chip_604x = 2,
79 chip_608x = 3,
80
81 /* PCI interface registers */
82
83 PCI_MAIN_CMD_STS_OFS = 0xd30,
84 STOP_PCI_MASTER = (1 << 2),
85 PCI_MASTER_EMPTY = (1 << 3),
86 GLOB_SFT_RST = (1 << 4),
87
88 PCI_IRQ_CAUSE_OFS = 0x1d58,
89 PCI_IRQ_MASK_OFS = 0x1d5c,
90 PCI_UNMASK_ALL_IRQS = 0x7fffff, /* bits 22-0 */
91
92 HC_MAIN_IRQ_CAUSE_OFS = 0x1d60,
93 HC_MAIN_IRQ_MASK_OFS = 0x1d64,
94 PORT0_ERR = (1 << 0), /* shift by port # */
95 PORT0_DONE = (1 << 1), /* shift by port # */
96 HC0_IRQ_PEND = 0x1ff, /* bits 0-8 = HC0's ports */
97 HC_SHIFT = 9, /* bits 9-17 = HC1's ports */
98 PCI_ERR = (1 << 18),
99 TRAN_LO_DONE = (1 << 19), /* 6xxx: IRQ coalescing */
100 TRAN_HI_DONE = (1 << 20), /* 6xxx: IRQ coalescing */
101 PORTS_0_7_COAL_DONE = (1 << 21), /* 6xxx: IRQ coalescing */
102 GPIO_INT = (1 << 22),
103 SELF_INT = (1 << 23),
104 TWSI_INT = (1 << 24),
105 HC_MAIN_RSVD = (0x7f << 25), /* bits 31-25 */
106 HC_MAIN_MASKED_IRQS = (TRAN_LO_DONE | TRAN_HI_DONE |
107 PORTS_0_7_COAL_DONE | GPIO_INT | TWSI_INT |
108 HC_MAIN_RSVD),
109
110 /* SATAHC registers */
111 HC_CFG_OFS = 0,
112
113 HC_IRQ_CAUSE_OFS = 0x14,
114 CRBP_DMA_DONE = (1 << 0), /* shift by port # */
115 HC_IRQ_COAL = (1 << 4), /* IRQ coalescing */
116 DEV_IRQ = (1 << 8), /* shift by port # */
117
118 /* Shadow block registers */
119 SHD_PIO_DATA_OFS = 0x100,
120 SHD_FEA_ERR_OFS = 0x104,
121 SHD_SECT_CNT_OFS = 0x108,
122 SHD_LBA_L_OFS = 0x10C,
123 SHD_LBA_M_OFS = 0x110,
124 SHD_LBA_H_OFS = 0x114,
125 SHD_DEV_HD_OFS = 0x118,
126 SHD_CMD_STA_OFS = 0x11C,
127 SHD_CTL_AST_OFS = 0x120,
128
129 /* SATA registers */
130 SATA_STATUS_OFS = 0x300, /* ctrl, err regs follow status */
131 SATA_ACTIVE_OFS = 0x350,
132
133 /* Port registers */
134 EDMA_CFG_OFS = 0,
135
136 EDMA_ERR_IRQ_CAUSE_OFS = 0x8,
137 EDMA_ERR_IRQ_MASK_OFS = 0xc,
138 EDMA_ERR_D_PAR = (1 << 0),
139 EDMA_ERR_PRD_PAR = (1 << 1),
140 EDMA_ERR_DEV = (1 << 2),
141 EDMA_ERR_DEV_DCON = (1 << 3),
142 EDMA_ERR_DEV_CON = (1 << 4),
143 EDMA_ERR_SERR = (1 << 5),
144 EDMA_ERR_SELF_DIS = (1 << 7),
145 EDMA_ERR_BIST_ASYNC = (1 << 8),
146 EDMA_ERR_CRBQ_PAR = (1 << 9),
147 EDMA_ERR_CRPB_PAR = (1 << 10),
148 EDMA_ERR_INTRL_PAR = (1 << 11),
149 EDMA_ERR_IORDY = (1 << 12),
150 EDMA_ERR_LNK_CTRL_RX = (0xf << 13),
151 EDMA_ERR_LNK_CTRL_RX_2 = (1 << 15),
152 EDMA_ERR_LNK_DATA_RX = (0xf << 17),
153 EDMA_ERR_LNK_CTRL_TX = (0x1f << 21),
154 EDMA_ERR_LNK_DATA_TX = (0x1f << 26),
155 EDMA_ERR_TRANS_PROTO = (1 << 31),
156 EDMA_ERR_FATAL = (EDMA_ERR_D_PAR | EDMA_ERR_PRD_PAR |
157 EDMA_ERR_DEV_DCON | EDMA_ERR_CRBQ_PAR |
158 EDMA_ERR_CRPB_PAR | EDMA_ERR_INTRL_PAR |
159 EDMA_ERR_IORDY | EDMA_ERR_LNK_CTRL_RX_2 |
160 EDMA_ERR_LNK_DATA_RX |
161 EDMA_ERR_LNK_DATA_TX |
162 EDMA_ERR_TRANS_PROTO),
163
164 EDMA_CMD_OFS = 0x28,
165 EDMA_EN = (1 << 0),
166 EDMA_DS = (1 << 1),
167 ATA_RST = (1 << 2),
168
169 /* BDMA is 6xxx part only */
170 BDMA_CMD_OFS = 0x224,
171 BDMA_START = (1 << 0),
172
173 MV_UNDEF = 0,
174};
175
176struct mv_port_priv {
177
178};
179
180struct mv_host_priv {
181
182};
183
184static void mv_irq_clear(struct ata_port *ap);
185static u32 mv_scr_read(struct ata_port *ap, unsigned int sc_reg_in);
186static void mv_scr_write(struct ata_port *ap, unsigned int sc_reg_in, u32 val);
187static void mv_phy_reset(struct ata_port *ap);
188static int mv_master_reset(void __iomem *mmio_base);
189static irqreturn_t mv_interrupt(int irq, void *dev_instance,
190 struct pt_regs *regs);
191static int mv_init_one(struct pci_dev *pdev, const struct pci_device_id *ent);
192
193static Scsi_Host_Template mv_sht = {
194 .module = THIS_MODULE,
195 .name = DRV_NAME,
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 = MV_UNDEF,
202 .max_sectors = ATA_MAX_SECTORS,
203 .cmd_per_lun = ATA_SHT_CMD_PER_LUN,
204 .emulated = ATA_SHT_EMULATED,
205 .use_clustering = MV_UNDEF,
206 .proc_name = DRV_NAME,
207 .dma_boundary = MV_DMA_BOUNDARY,
208 .slave_configure = ata_scsi_slave_config,
209 .bios_param = ata_std_bios_param,
210 .ordered_flush = 1,
211};
212
213static struct ata_port_operations mv_ops = {
214 .port_disable = ata_port_disable,
215
216 .tf_load = ata_tf_load,
217 .tf_read = ata_tf_read,
218 .check_status = ata_check_status,
219 .exec_command = ata_exec_command,
220 .dev_select = ata_std_dev_select,
221
222 .phy_reset = mv_phy_reset,
223
224 .qc_prep = ata_qc_prep,
225 .qc_issue = ata_qc_issue_prot,
226
227 .eng_timeout = ata_eng_timeout,
228
229 .irq_handler = mv_interrupt,
230 .irq_clear = mv_irq_clear,
231
232 .scr_read = mv_scr_read,
233 .scr_write = mv_scr_write,
234
235 .port_start = ata_port_start,
236 .port_stop = ata_port_stop,
237 .host_stop = ata_host_stop,
238};
239
240static struct ata_port_info mv_port_info[] = {
241 { /* chip_504x */
242 .sht = &mv_sht,
243 .host_flags = (ATA_FLAG_SATA | ATA_FLAG_NO_LEGACY |
244 ATA_FLAG_SATA_RESET | ATA_FLAG_MMIO),
245 .pio_mask = 0x1f, /* pio4-0 */
246 .udma_mask = 0, /* 0x7f (udma6-0 disabled for now) */
247 .port_ops = &mv_ops,
248 },
249 { /* chip_508x */
250 .sht = &mv_sht,
251 .host_flags = (ATA_FLAG_SATA | ATA_FLAG_NO_LEGACY |
252 ATA_FLAG_SATA_RESET | ATA_FLAG_MMIO |
253 MV_FLAG_DUAL_HC),
254 .pio_mask = 0x1f, /* pio4-0 */
255 .udma_mask = 0, /* 0x7f (udma6-0 disabled for now) */
256 .port_ops = &mv_ops,
257 },
258 { /* chip_604x */
259 .sht = &mv_sht,
260 .host_flags = (ATA_FLAG_SATA | ATA_FLAG_NO_LEGACY |
261 ATA_FLAG_SATA_RESET | ATA_FLAG_MMIO |
262 MV_FLAG_IRQ_COALESCE | MV_FLAG_BDMA),
263 .pio_mask = 0x1f, /* pio4-0 */
264 .udma_mask = 0, /* 0x7f (udma6-0 disabled for now) */
265 .port_ops = &mv_ops,
266 },
267 { /* chip_608x */
268 .sht = &mv_sht,
269 .host_flags = (ATA_FLAG_SATA | ATA_FLAG_NO_LEGACY |
270 ATA_FLAG_SATA_RESET | ATA_FLAG_MMIO |
271 MV_FLAG_IRQ_COALESCE | MV_FLAG_DUAL_HC |
272 MV_FLAG_BDMA),
273 .pio_mask = 0x1f, /* pio4-0 */
274 .udma_mask = 0, /* 0x7f (udma6-0 disabled for now) */
275 .port_ops = &mv_ops,
276 },
277};
278
279static struct pci_device_id mv_pci_tbl[] = {
280 {PCI_DEVICE(PCI_VENDOR_ID_MARVELL, 0x5040), 0, 0, chip_504x},
281 {PCI_DEVICE(PCI_VENDOR_ID_MARVELL, 0x5041), 0, 0, chip_504x},
282 {PCI_DEVICE(PCI_VENDOR_ID_MARVELL, 0x5080), 0, 0, chip_508x},
283 {PCI_DEVICE(PCI_VENDOR_ID_MARVELL, 0x5081), 0, 0, chip_508x},
284
285 {PCI_DEVICE(PCI_VENDOR_ID_MARVELL, 0x6040), 0, 0, chip_604x},
286 {PCI_DEVICE(PCI_VENDOR_ID_MARVELL, 0x6041), 0, 0, chip_604x},
287 {PCI_DEVICE(PCI_VENDOR_ID_MARVELL, 0x6080), 0, 0, chip_608x},
288 {PCI_DEVICE(PCI_VENDOR_ID_MARVELL, 0x6081), 0, 0, chip_608x},
289 {} /* terminate list */
290};
291
292static struct pci_driver mv_pci_driver = {
293 .name = DRV_NAME,
294 .id_table = mv_pci_tbl,
295 .probe = mv_init_one,
296 .remove = ata_pci_remove_one,
297};
298
299/*
300 * Functions
301 */
302
303static inline void writelfl(unsigned long data, void __iomem *addr)
304{
305 writel(data, addr);
306 (void) readl(addr); /* flush to avoid PCI posted write */
307}
308
309static inline void __iomem *mv_port_addr_to_hc_base(void __iomem *port_mmio)
310{
311 return ((void __iomem *)((unsigned long)port_mmio &
312 (unsigned long)SATAHC_MASK));
313}
314
315static inline void __iomem *mv_hc_base(void __iomem *base, unsigned int hc)
316{
317 return (base + MV_SATAHC0_REG_BASE + (hc * MV_SATAHC_REG_SZ));
318}
319
320static inline void __iomem *mv_port_base(void __iomem *base, unsigned int port)
321{
322 return (mv_hc_base(base, port >> MV_PORT_HC_SHIFT) +
323 MV_SATAHC_ARBTR_REG_SZ +
324 ((port & MV_PORT_MASK) * MV_PORT_REG_SZ));
325}
326
327static inline void __iomem *mv_ap_base(struct ata_port *ap)
328{
329 return mv_port_base(ap->host_set->mmio_base, ap->port_no);
330}
331
332static inline int mv_get_hc_count(unsigned long flags)
333{
334 return ((flags & MV_FLAG_DUAL_HC) ? 2 : 1);
335}
336
337static inline int mv_is_edma_active(struct ata_port *ap)
338{
339 void __iomem *port_mmio = mv_ap_base(ap);
340 return (EDMA_EN & readl(port_mmio + EDMA_CMD_OFS));
341}
342
343static inline int mv_port_bdma_capable(struct ata_port *ap)
344{
345 return (ap->flags & MV_FLAG_BDMA);
346}
347
348static void mv_irq_clear(struct ata_port *ap)
349{
350}
351
352static unsigned int mv_scr_offset(unsigned int sc_reg_in)
353{
354 unsigned int ofs;
355
356 switch (sc_reg_in) {
357 case SCR_STATUS:
358 case SCR_CONTROL:
359 case SCR_ERROR:
360 ofs = SATA_STATUS_OFS + (sc_reg_in * sizeof(u32));
361 break;
362 case SCR_ACTIVE:
363 ofs = SATA_ACTIVE_OFS; /* active is not with the others */
364 break;
365 default:
366 ofs = 0xffffffffU;
367 break;
368 }
369 return ofs;
370}
371
372static u32 mv_scr_read(struct ata_port *ap, unsigned int sc_reg_in)
373{
374 unsigned int ofs = mv_scr_offset(sc_reg_in);
375
376 if (0xffffffffU != ofs) {
377 return readl(mv_ap_base(ap) + ofs);
378 } else {
379 return (u32) ofs;
380 }
381}
382
383static void mv_scr_write(struct ata_port *ap, unsigned int sc_reg_in, u32 val)
384{
385 unsigned int ofs = mv_scr_offset(sc_reg_in);
386
387 if (0xffffffffU != ofs) {
388 writelfl(val, mv_ap_base(ap) + ofs);
389 }
390}
391
392static int mv_master_reset(void __iomem *mmio_base)
393{
394 void __iomem *reg = mmio_base + PCI_MAIN_CMD_STS_OFS;
395 int i, rc = 0;
396 u32 t;
397
398 VPRINTK("ENTER\n");
399
400 /* Following procedure defined in PCI "main command and status
401 * register" table.
402 */
403 t = readl(reg);
404 writel(t | STOP_PCI_MASTER, reg);
405
406 for (i = 0; i < 100; i++) {
407 msleep(10);
408 t = readl(reg);
409 if (PCI_MASTER_EMPTY & t) {
410 break;
411 }
412 }
413 if (!(PCI_MASTER_EMPTY & t)) {
414 printk(KERN_ERR DRV_NAME "PCI master won't flush\n");
415 rc = 1; /* broken HW? */
416 goto done;
417 }
418
419 /* set reset */
420 i = 5;
421 do {
422 writel(t | GLOB_SFT_RST, reg);
423 t = readl(reg);
424 udelay(1);
425 } while (!(GLOB_SFT_RST & t) && (i-- > 0));
426
427 if (!(GLOB_SFT_RST & t)) {
428 printk(KERN_ERR DRV_NAME "can't set global reset\n");
429 rc = 1; /* broken HW? */
430 goto done;
431 }
432
433 /* clear reset */
434 i = 5;
435 do {
436 writel(t & ~GLOB_SFT_RST, reg);
437 t = readl(reg);
438 udelay(1);
439 } while ((GLOB_SFT_RST & t) && (i-- > 0));
440
441 if (GLOB_SFT_RST & t) {
442 printk(KERN_ERR DRV_NAME "can't clear global reset\n");
443 rc = 1; /* broken HW? */
444 }
445
446 done:
447 VPRINTK("EXIT, rc = %i\n", rc);
448 return rc;
449}
450
451static void mv_err_intr(struct ata_port *ap)
452{
453 void __iomem *port_mmio;
454 u32 edma_err_cause, serr = 0;
455
456 /* bug here b/c we got an err int on a port we don't know about,
457 * so there's no way to clear it
458 */
459 BUG_ON(NULL == ap);
460 port_mmio = mv_ap_base(ap);
461
462 edma_err_cause = readl(port_mmio + EDMA_ERR_IRQ_CAUSE_OFS);
463
464 if (EDMA_ERR_SERR & edma_err_cause) {
465 serr = scr_read(ap, SCR_ERROR);
466 scr_write_flush(ap, SCR_ERROR, serr);
467 }
468 DPRINTK("port %u error; EDMA err cause: 0x%08x SERR: 0x%08x\n",
469 ap->port_no, edma_err_cause, serr);
470
471 /* Clear EDMA now that SERR cleanup done */
472 writelfl(0, port_mmio + EDMA_ERR_IRQ_CAUSE_OFS);
473
474 /* check for fatal here and recover if needed */
475 if (EDMA_ERR_FATAL & edma_err_cause) {
476 mv_phy_reset(ap);
477 }
478}
479
480/* Handle any outstanding interrupts in a single SATAHC
481 */
482static void mv_host_intr(struct ata_host_set *host_set, u32 relevant,
483 unsigned int hc)
484{
485 void __iomem *mmio = host_set->mmio_base;
486 void __iomem *hc_mmio = mv_hc_base(mmio, hc);
487 struct ata_port *ap;
488 struct ata_queued_cmd *qc;
489 u32 hc_irq_cause;
490 int shift, port, port0, hard_port;
491 u8 ata_status;
492
493 if (hc == 0) {
494 port0 = 0;
495 } else {
496 port0 = MV_PORTS_PER_HC;
497 }
498
499 /* we'll need the HC success int register in most cases */
500 hc_irq_cause = readl(hc_mmio + HC_IRQ_CAUSE_OFS);
501 if (hc_irq_cause) {
502 writelfl(0, hc_mmio + HC_IRQ_CAUSE_OFS);
503 }
504
505 VPRINTK("ENTER, hc%u relevant=0x%08x HC IRQ cause=0x%08x\n",
506 hc,relevant,hc_irq_cause);
507
508 for (port = port0; port < port0 + MV_PORTS_PER_HC; port++) {
509 ap = host_set->ports[port];
510 hard_port = port & MV_PORT_MASK; /* range 0-3 */
511 ata_status = 0xffU;
512
513 if (((CRBP_DMA_DONE | DEV_IRQ) << hard_port) & hc_irq_cause) {
514 BUG_ON(NULL == ap);
515 /* rcv'd new resp, basic DMA complete, or ATA IRQ */
516 /* This is needed to clear the ATA INTRQ.
517 * FIXME: don't read the status reg in EDMA mode!
518 */
519 ata_status = readb((void __iomem *)
520 ap->ioaddr.status_addr);
521 }
522
523 shift = port * 2;
524 if (port >= MV_PORTS_PER_HC) {
525 shift++; /* skip bit 8 in the HC Main IRQ reg */
526 }
527 if ((PORT0_ERR << shift) & relevant) {
528 mv_err_intr(ap);
529 /* FIXME: smart to OR in ATA_ERR? */
530 ata_status = readb((void __iomem *)
531 ap->ioaddr.status_addr) | ATA_ERR;
532 }
533
534 if (ap) {
535 qc = ata_qc_from_tag(ap, ap->active_tag);
536 if (NULL != qc) {
537 VPRINTK("port %u IRQ found for qc, "
538 "ata_status 0x%x\n", port,ata_status);
539 BUG_ON(0xffU == ata_status);
540 /* mark qc status appropriately */
541 ata_qc_complete(qc, ata_status);
542 }
543 }
544 }
545 VPRINTK("EXIT\n");
546}
547
548static irqreturn_t mv_interrupt(int irq, void *dev_instance,
549 struct pt_regs *regs)
550{
551 struct ata_host_set *host_set = dev_instance;
552 unsigned int hc, handled = 0, n_hcs;
553 void __iomem *mmio;
554 u32 irq_stat;
555
556 mmio = host_set->mmio_base;
557 irq_stat = readl(mmio + HC_MAIN_IRQ_CAUSE_OFS);
558 n_hcs = mv_get_hc_count(host_set->ports[0]->flags);
559
560 /* check the cases where we either have nothing pending or have read
561 * a bogus register value which can indicate HW removal or PCI fault
562 */
563 if (!irq_stat || (0xffffffffU == irq_stat)) {
564 return IRQ_NONE;
565 }
566
567 spin_lock(&host_set->lock);
568
569 for (hc = 0; hc < n_hcs; hc++) {
570 u32 relevant = irq_stat & (HC0_IRQ_PEND << (hc * HC_SHIFT));
571 if (relevant) {
572 mv_host_intr(host_set, relevant, hc);
573 handled = 1;
574 }
575 }
576 if (PCI_ERR & irq_stat) {
577 /* FIXME: these are all masked by default, but still need
578 * to recover from them properly.
579 */
580 }
581
582 spin_unlock(&host_set->lock);
583
584 return IRQ_RETVAL(handled);
585}
586
587static void mv_phy_reset(struct ata_port *ap)
588{
589 void __iomem *port_mmio = mv_ap_base(ap);
590 struct ata_taskfile tf;
591 struct ata_device *dev = &ap->device[0];
592 u32 edma = 0, bdma;
593
594 VPRINTK("ENTER, port %u, mmio 0x%p\n", ap->port_no, port_mmio);
595
596 edma = readl(port_mmio + EDMA_CMD_OFS);
597 if (EDMA_EN & edma) {
598 /* disable EDMA if active */
599 edma &= ~EDMA_EN;
600 writelfl(edma | EDMA_DS, port_mmio + EDMA_CMD_OFS);
601 udelay(1);
602 } else if (mv_port_bdma_capable(ap) &&
603 (bdma = readl(port_mmio + BDMA_CMD_OFS)) & BDMA_START) {
604 /* disable BDMA if active */
605 writelfl(bdma & ~BDMA_START, port_mmio + BDMA_CMD_OFS);
606 }
607
608 writelfl(edma | ATA_RST, port_mmio + EDMA_CMD_OFS);
609 udelay(25); /* allow reset propagation */
610
611 /* Spec never mentions clearing the bit. Marvell's driver does
612 * clear the bit, however.
613 */
614 writelfl(edma & ~ATA_RST, port_mmio + EDMA_CMD_OFS);
615
616 VPRINTK("Done. Now calling __sata_phy_reset()\n");
617
618 /* proceed to init communications via the scr_control reg */
619 __sata_phy_reset(ap);
620
621 if (ap->flags & ATA_FLAG_PORT_DISABLED) {
622 VPRINTK("Port disabled pre-sig. Exiting.\n");
623 return;
624 }
625
626 tf.lbah = readb((void __iomem *) ap->ioaddr.lbah_addr);
627 tf.lbam = readb((void __iomem *) ap->ioaddr.lbam_addr);
628 tf.lbal = readb((void __iomem *) ap->ioaddr.lbal_addr);
629 tf.nsect = readb((void __iomem *) ap->ioaddr.nsect_addr);
630
631 dev->class = ata_dev_classify(&tf);
632 if (!ata_dev_present(dev)) {
633 VPRINTK("Port disabled post-sig: No device present.\n");
634 ata_port_disable(ap);
635 }
636 VPRINTK("EXIT\n");
637}
638
639static void mv_port_init(struct ata_ioports *port, unsigned long base)
640{
641 /* PIO related setup */
642 port->data_addr = base + SHD_PIO_DATA_OFS;
643 port->error_addr = port->feature_addr = base + SHD_FEA_ERR_OFS;
644 port->nsect_addr = base + SHD_SECT_CNT_OFS;
645 port->lbal_addr = base + SHD_LBA_L_OFS;
646 port->lbam_addr = base + SHD_LBA_M_OFS;
647 port->lbah_addr = base + SHD_LBA_H_OFS;
648 port->device_addr = base + SHD_DEV_HD_OFS;
649 port->status_addr = port->command_addr = base + SHD_CMD_STA_OFS;
650 port->altstatus_addr = port->ctl_addr = base + SHD_CTL_AST_OFS;
651 /* unused */
652 port->cmd_addr = port->bmdma_addr = port->scr_addr = 0;
653
654 /* unmask all EDMA error interrupts */
655 writel(~0, (void __iomem *)base + EDMA_ERR_IRQ_MASK_OFS);
656
657 VPRINTK("EDMA cfg=0x%08x EDMA IRQ err cause/mask=0x%08x/0x%08x\n",
658 readl((void __iomem *)base + EDMA_CFG_OFS),
659 readl((void __iomem *)base + EDMA_ERR_IRQ_CAUSE_OFS),
660 readl((void __iomem *)base + EDMA_ERR_IRQ_MASK_OFS));
661}
662
663static int mv_host_init(struct ata_probe_ent *probe_ent)
664{
665 int rc = 0, n_hc, port, hc;
666 void __iomem *mmio = probe_ent->mmio_base;
667 void __iomem *port_mmio;
668
669 if (mv_master_reset(probe_ent->mmio_base)) {
670 rc = 1;
671 goto done;
672 }
673
674 n_hc = mv_get_hc_count(probe_ent->host_flags);
675 probe_ent->n_ports = MV_PORTS_PER_HC * n_hc;
676
677 for (port = 0; port < probe_ent->n_ports; port++) {
678 port_mmio = mv_port_base(mmio, port);
679 mv_port_init(&probe_ent->port[port], (unsigned long)port_mmio);
680 }
681
682 for (hc = 0; hc < n_hc; hc++) {
683 VPRINTK("HC%i: HC config=0x%08x HC IRQ cause=0x%08x\n", hc,
684 readl(mv_hc_base(mmio, hc) + HC_CFG_OFS),
685 readl(mv_hc_base(mmio, hc) + HC_IRQ_CAUSE_OFS));
686 }
687
688 writel(~HC_MAIN_MASKED_IRQS, mmio + HC_MAIN_IRQ_MASK_OFS);
689 writel(PCI_UNMASK_ALL_IRQS, mmio + PCI_IRQ_MASK_OFS);
690
691 VPRINTK("HC MAIN IRQ cause/mask=0x%08x/0x%08x "
692 "PCI int cause/mask=0x%08x/0x%08x\n",
693 readl(mmio + HC_MAIN_IRQ_CAUSE_OFS),
694 readl(mmio + HC_MAIN_IRQ_MASK_OFS),
695 readl(mmio + PCI_IRQ_CAUSE_OFS),
696 readl(mmio + PCI_IRQ_MASK_OFS));
697
698 done:
699 return rc;
700}
701
702static int mv_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
703{
704 static int printed_version = 0;
705 struct ata_probe_ent *probe_ent = NULL;
706 struct mv_host_priv *hpriv;
707 unsigned int board_idx = (unsigned int)ent->driver_data;
708 void __iomem *mmio_base;
709 int pci_dev_busy = 0;
710 int rc;
711
712 if (!printed_version++) {
713 printk(KERN_DEBUG DRV_NAME " version " DRV_VERSION "\n");
714 }
715
716 VPRINTK("ENTER for PCI Bus:Slot.Func=%u:%u.%u\n", pdev->bus->number,
717 PCI_SLOT(pdev->devfn), PCI_FUNC(pdev->devfn));
718
719 rc = pci_enable_device(pdev);
720 if (rc) {
721 return rc;
722 }
723
724 rc = pci_request_regions(pdev, DRV_NAME);
725 if (rc) {
726 pci_dev_busy = 1;
727 goto err_out;
728 }
729
730 pci_intx(pdev, 1);
731
732 probe_ent = kmalloc(sizeof(*probe_ent), GFP_KERNEL);
733 if (probe_ent == NULL) {
734 rc = -ENOMEM;
735 goto err_out_regions;
736 }
737
738 memset(probe_ent, 0, sizeof(*probe_ent));
739 probe_ent->dev = pci_dev_to_dev(pdev);
740 INIT_LIST_HEAD(&probe_ent->node);
741
742 mmio_base = ioremap_nocache(pci_resource_start(pdev, MV_PRIMARY_BAR),
743 pci_resource_len(pdev, MV_PRIMARY_BAR));
744 if (mmio_base == NULL) {
745 rc = -ENOMEM;
746 goto err_out_free_ent;
747 }
748
749 hpriv = kmalloc(sizeof(*hpriv), GFP_KERNEL);
750 if (!hpriv) {
751 rc = -ENOMEM;
752 goto err_out_iounmap;
753 }
754 memset(hpriv, 0, sizeof(*hpriv));
755
756 probe_ent->sht = mv_port_info[board_idx].sht;
757 probe_ent->host_flags = mv_port_info[board_idx].host_flags;
758 probe_ent->pio_mask = mv_port_info[board_idx].pio_mask;
759 probe_ent->udma_mask = mv_port_info[board_idx].udma_mask;
760 probe_ent->port_ops = mv_port_info[board_idx].port_ops;
761
762 probe_ent->irq = pdev->irq;
763 probe_ent->irq_flags = SA_SHIRQ;
764 probe_ent->mmio_base = mmio_base;
765 probe_ent->private_data = hpriv;
766
767 /* initialize adapter */
768 rc = mv_host_init(probe_ent);
769 if (rc) {
770 goto err_out_hpriv;
771 }
772/* mv_print_info(probe_ent); */
773
774 {
775 int b, w;
776 u32 dw[4]; /* hold a line of 16b */
777 VPRINTK("PCI config space:\n");
778 for (b = 0; b < 0x40; ) {
779 for (w = 0; w < 4; w++) {
780 (void) pci_read_config_dword(pdev,b,&dw[w]);
781 b += sizeof(*dw);
782 }
783 VPRINTK("%08x %08x %08x %08x\n",
784 dw[0],dw[1],dw[2],dw[3]);
785 }
786 }
787
788 /* FIXME: check ata_device_add return value */
789 ata_device_add(probe_ent);
790 kfree(probe_ent);
791
792 return 0;
793
794 err_out_hpriv:
795 kfree(hpriv);
796 err_out_iounmap:
797 iounmap(mmio_base);
798 err_out_free_ent:
799 kfree(probe_ent);
800 err_out_regions:
801 pci_release_regions(pdev);
802 err_out:
803 if (!pci_dev_busy) {
804 pci_disable_device(pdev);
805 }
806
807 return rc;
808}
809
810static int __init mv_init(void)
811{
812 return pci_module_init(&mv_pci_driver);
813}
814
815static void __exit mv_exit(void)
816{
817 pci_unregister_driver(&mv_pci_driver);
818}
819
820MODULE_AUTHOR("Brett Russ");
821MODULE_DESCRIPTION("SCSI low-level driver for Marvell SATA controllers");
822MODULE_LICENSE("GPL");
823MODULE_DEVICE_TABLE(pci, mv_pci_tbl);
824MODULE_VERSION(DRV_VERSION);
825
826module_init(mv_init);
827module_exit(mv_exit);
generated by cgit v1.2.2 (git 2.25.0) at 2024-11-26 20:21:02 -0500