2 * sata_mv.c - Marvell SATA support
4 * Copyright 2005: EMC Corporation, all rights reserved.
6 * Please ALWAYS copy linux-ide@vger.kernel.org on emails.
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.
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.
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
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 <linux/device.h>
33 #include <scsi/scsi_host.h>
34 #include <scsi/scsi_cmnd.h>
35 #include <linux/libata.h>
38 #define DRV_NAME "sata_mv"
39 #define DRV_VERSION "0.25"
42 /* BAR's are enumerated in terms of pci_resource_start() terms */
43 MV_PRIMARY_BAR = 0, /* offset 0x10: memory space */
44 MV_IO_BAR = 2, /* offset 0x18: IO space */
45 MV_MISC_BAR = 3, /* offset 0x1c: FLASH, NVRAM, SRAM */
47 MV_MAJOR_REG_AREA_SZ = 0x10000, /* 64KB */
48 MV_MINOR_REG_AREA_SZ = 0x2000, /* 8KB */
51 MV_IRQ_COAL_REG_BASE = 0x18000, /* 6xxx part only */
52 MV_SATAHC0_REG_BASE = 0x20000,
54 MV_PCI_REG_SZ = MV_MAJOR_REG_AREA_SZ,
55 MV_SATAHC_REG_SZ = MV_MAJOR_REG_AREA_SZ,
56 MV_SATAHC_ARBTR_REG_SZ = MV_MINOR_REG_AREA_SZ, /* arbiter */
57 MV_PORT_REG_SZ = MV_MINOR_REG_AREA_SZ,
59 MV_USE_Q_DEPTH = ATA_DEF_QUEUE,
62 MV_MAX_Q_DEPTH_MASK = MV_MAX_Q_DEPTH - 1,
64 /* CRQB needs alignment on a 1KB boundary. Size == 1KB
65 * CRPB needs alignment on a 256B boundary. Size == 256B
66 * SG count of 176 leads to MV_PORT_PRIV_DMA_SZ == 4KB
67 * ePRD (SG) entries need alignment on a 16B boundary. Size == 16B
69 MV_CRQB_Q_SZ = (32 * MV_MAX_Q_DEPTH),
70 MV_CRPB_Q_SZ = (8 * MV_MAX_Q_DEPTH),
72 MV_SG_TBL_SZ = (16 * MV_MAX_SG_CT),
73 MV_PORT_PRIV_DMA_SZ = (MV_CRQB_Q_SZ + MV_CRPB_Q_SZ + MV_SG_TBL_SZ),
75 /* Our DMA boundary is determined by an ePRD being unable to handle
76 * anything larger than 64KB
78 MV_DMA_BOUNDARY = 0xffffU,
81 /* == (port / MV_PORTS_PER_HC) to determine HC from 0-7 port */
83 /* == (port % MV_PORTS_PER_HC) to determine hard port from 0-7 port */
87 MV_FLAG_DUAL_HC = (1 << 30), /* two SATA Host Controllers */
88 MV_FLAG_IRQ_COALESCE = (1 << 29), /* IRQ coalescing capability */
89 MV_FLAG_GLBL_SFT_RST = (1 << 28), /* Global Soft Reset support */
90 MV_COMMON_FLAGS = (ATA_FLAG_SATA | ATA_FLAG_NO_LEGACY |
91 ATA_FLAG_SATA_RESET | ATA_FLAG_MMIO),
92 MV_6XXX_FLAGS = (MV_FLAG_IRQ_COALESCE |
93 MV_FLAG_GLBL_SFT_RST),
100 CRQB_FLAG_READ = (1 << 0),
102 CRQB_CMD_ADDR_SHIFT = 8,
103 CRQB_CMD_CS = (0x2 << 11),
104 CRQB_CMD_LAST = (1 << 15),
106 CRPB_FLAG_STATUS_SHIFT = 8,
108 EPRD_FLAG_END_OF_TBL = (1 << 31),
110 /* PCI interface registers */
112 PCI_COMMAND_OFS = 0xc00,
114 PCI_MAIN_CMD_STS_OFS = 0xd30,
115 STOP_PCI_MASTER = (1 << 2),
116 PCI_MASTER_EMPTY = (1 << 3),
117 GLOB_SFT_RST = (1 << 4),
119 PCI_IRQ_CAUSE_OFS = 0x1d58,
120 PCI_IRQ_MASK_OFS = 0x1d5c,
121 PCI_UNMASK_ALL_IRQS = 0x7fffff, /* bits 22-0 */
123 HC_MAIN_IRQ_CAUSE_OFS = 0x1d60,
124 HC_MAIN_IRQ_MASK_OFS = 0x1d64,
125 PORT0_ERR = (1 << 0), /* shift by port # */
126 PORT0_DONE = (1 << 1), /* shift by port # */
127 HC0_IRQ_PEND = 0x1ff, /* bits 0-8 = HC0's ports */
128 HC_SHIFT = 9, /* bits 9-17 = HC1's ports */
130 TRAN_LO_DONE = (1 << 19), /* 6xxx: IRQ coalescing */
131 TRAN_HI_DONE = (1 << 20), /* 6xxx: IRQ coalescing */
132 PORTS_0_7_COAL_DONE = (1 << 21), /* 6xxx: IRQ coalescing */
133 GPIO_INT = (1 << 22),
134 SELF_INT = (1 << 23),
135 TWSI_INT = (1 << 24),
136 HC_MAIN_RSVD = (0x7f << 25), /* bits 31-25 */
137 HC_MAIN_MASKED_IRQS = (TRAN_LO_DONE | TRAN_HI_DONE |
138 PORTS_0_7_COAL_DONE | GPIO_INT | TWSI_INT |
141 /* SATAHC registers */
144 HC_IRQ_CAUSE_OFS = 0x14,
145 CRPB_DMA_DONE = (1 << 0), /* shift by port # */
146 HC_IRQ_COAL = (1 << 4), /* IRQ coalescing */
147 DEV_IRQ = (1 << 8), /* shift by port # */
149 /* Shadow block registers */
151 SHD_CTL_AST_OFS = 0x20, /* ofs from SHD_BLK_OFS */
154 SATA_STATUS_OFS = 0x300, /* ctrl, err regs follow status */
155 SATA_ACTIVE_OFS = 0x350,
159 EDMA_CFG_Q_DEPTH = 0, /* queueing disabled */
160 EDMA_CFG_NCQ = (1 << 5),
161 EDMA_CFG_NCQ_GO_ON_ERR = (1 << 14), /* continue on error */
162 EDMA_CFG_RD_BRST_EXT = (1 << 11), /* read burst 512B */
163 EDMA_CFG_WR_BUFF_LEN = (1 << 13), /* write buffer 512B */
165 EDMA_ERR_IRQ_CAUSE_OFS = 0x8,
166 EDMA_ERR_IRQ_MASK_OFS = 0xc,
167 EDMA_ERR_D_PAR = (1 << 0),
168 EDMA_ERR_PRD_PAR = (1 << 1),
169 EDMA_ERR_DEV = (1 << 2),
170 EDMA_ERR_DEV_DCON = (1 << 3),
171 EDMA_ERR_DEV_CON = (1 << 4),
172 EDMA_ERR_SERR = (1 << 5),
173 EDMA_ERR_SELF_DIS = (1 << 7),
174 EDMA_ERR_BIST_ASYNC = (1 << 8),
175 EDMA_ERR_CRBQ_PAR = (1 << 9),
176 EDMA_ERR_CRPB_PAR = (1 << 10),
177 EDMA_ERR_INTRL_PAR = (1 << 11),
178 EDMA_ERR_IORDY = (1 << 12),
179 EDMA_ERR_LNK_CTRL_RX = (0xf << 13),
180 EDMA_ERR_LNK_CTRL_RX_2 = (1 << 15),
181 EDMA_ERR_LNK_DATA_RX = (0xf << 17),
182 EDMA_ERR_LNK_CTRL_TX = (0x1f << 21),
183 EDMA_ERR_LNK_DATA_TX = (0x1f << 26),
184 EDMA_ERR_TRANS_PROTO = (1 << 31),
185 EDMA_ERR_FATAL = (EDMA_ERR_D_PAR | EDMA_ERR_PRD_PAR |
186 EDMA_ERR_DEV_DCON | EDMA_ERR_CRBQ_PAR |
187 EDMA_ERR_CRPB_PAR | EDMA_ERR_INTRL_PAR |
188 EDMA_ERR_IORDY | EDMA_ERR_LNK_CTRL_RX_2 |
189 EDMA_ERR_LNK_DATA_RX |
190 EDMA_ERR_LNK_DATA_TX |
191 EDMA_ERR_TRANS_PROTO),
193 EDMA_REQ_Q_BASE_HI_OFS = 0x10,
194 EDMA_REQ_Q_IN_PTR_OFS = 0x14, /* also contains BASE_LO */
195 EDMA_REQ_Q_BASE_LO_MASK = 0xfffffc00U,
197 EDMA_REQ_Q_OUT_PTR_OFS = 0x18,
198 EDMA_REQ_Q_PTR_SHIFT = 5,
200 EDMA_RSP_Q_BASE_HI_OFS = 0x1c,
201 EDMA_RSP_Q_IN_PTR_OFS = 0x20,
202 EDMA_RSP_Q_OUT_PTR_OFS = 0x24, /* also contains BASE_LO */
203 EDMA_RSP_Q_BASE_LO_MASK = 0xffffff00U,
204 EDMA_RSP_Q_PTR_SHIFT = 3,
211 /* Host private flags (hp_flags) */
212 MV_HP_FLAG_MSI = (1 << 0),
214 /* Port private flags (pp_flags) */
215 MV_PP_FLAG_EDMA_EN = (1 << 0),
216 MV_PP_FLAG_EDMA_DS_ACT = (1 << 1),
219 /* Command ReQuest Block: 32B */
227 /* Command ResPonse Block: 8B */
234 /* EDMA Physical Region Descriptor (ePRD); A.K.A. SG */
242 struct mv_port_priv {
243 struct mv_crqb *crqb;
245 struct mv_crpb *crpb;
247 struct mv_sg *sg_tbl;
248 dma_addr_t sg_tbl_dma;
250 unsigned req_producer; /* cp of req_in_ptr */
251 unsigned rsp_consumer; /* cp of rsp_out_ptr */
255 struct mv_host_priv {
259 static void mv_irq_clear(struct ata_port *ap);
260 static u32 mv_scr_read(struct ata_port *ap, unsigned int sc_reg_in);
261 static void mv_scr_write(struct ata_port *ap, unsigned int sc_reg_in, u32 val);
262 static void mv_phy_reset(struct ata_port *ap);
263 static void mv_host_stop(struct ata_host_set *host_set);
264 static int mv_port_start(struct ata_port *ap);
265 static void mv_port_stop(struct ata_port *ap);
266 static void mv_qc_prep(struct ata_queued_cmd *qc);
267 static int mv_qc_issue(struct ata_queued_cmd *qc);
268 static irqreturn_t mv_interrupt(int irq, void *dev_instance,
269 struct pt_regs *regs);
270 static void mv_eng_timeout(struct ata_port *ap);
271 static int mv_init_one(struct pci_dev *pdev, const struct pci_device_id *ent);
273 static struct scsi_host_template mv_sht = {
274 .module = THIS_MODULE,
276 .ioctl = ata_scsi_ioctl,
277 .queuecommand = ata_scsi_queuecmd,
278 .eh_strategy_handler = ata_scsi_error,
279 .can_queue = MV_USE_Q_DEPTH,
280 .this_id = ATA_SHT_THIS_ID,
281 .sg_tablesize = MV_MAX_SG_CT,
282 .max_sectors = ATA_MAX_SECTORS,
283 .cmd_per_lun = ATA_SHT_CMD_PER_LUN,
284 .emulated = ATA_SHT_EMULATED,
285 .use_clustering = ATA_SHT_USE_CLUSTERING,
286 .proc_name = DRV_NAME,
287 .dma_boundary = MV_DMA_BOUNDARY,
288 .slave_configure = ata_scsi_slave_config,
289 .bios_param = ata_std_bios_param,
293 static const struct ata_port_operations mv_ops = {
294 .port_disable = ata_port_disable,
296 .tf_load = ata_tf_load,
297 .tf_read = ata_tf_read,
298 .check_status = ata_check_status,
299 .exec_command = ata_exec_command,
300 .dev_select = ata_std_dev_select,
302 .phy_reset = mv_phy_reset,
304 .qc_prep = mv_qc_prep,
305 .qc_issue = mv_qc_issue,
307 .eng_timeout = mv_eng_timeout,
309 .irq_handler = mv_interrupt,
310 .irq_clear = mv_irq_clear,
312 .scr_read = mv_scr_read,
313 .scr_write = mv_scr_write,
315 .port_start = mv_port_start,
316 .port_stop = mv_port_stop,
317 .host_stop = mv_host_stop,
320 static struct ata_port_info mv_port_info[] = {
323 .host_flags = MV_COMMON_FLAGS,
324 .pio_mask = 0x1f, /* pio0-4 */
325 .udma_mask = 0, /* 0x7f (udma0-6 disabled for now) */
330 .host_flags = (MV_COMMON_FLAGS | MV_FLAG_DUAL_HC),
331 .pio_mask = 0x1f, /* pio0-4 */
332 .udma_mask = 0, /* 0x7f (udma0-6 disabled for now) */
337 .host_flags = (MV_COMMON_FLAGS | MV_6XXX_FLAGS),
338 .pio_mask = 0x1f, /* pio0-4 */
339 .udma_mask = 0x7f, /* udma0-6 */
344 .host_flags = (MV_COMMON_FLAGS | MV_6XXX_FLAGS |
346 .pio_mask = 0x1f, /* pio0-4 */
347 .udma_mask = 0x7f, /* udma0-6 */
352 static const struct pci_device_id mv_pci_tbl[] = {
353 {PCI_DEVICE(PCI_VENDOR_ID_MARVELL, 0x5040), 0, 0, chip_504x},
354 {PCI_DEVICE(PCI_VENDOR_ID_MARVELL, 0x5041), 0, 0, chip_504x},
355 {PCI_DEVICE(PCI_VENDOR_ID_MARVELL, 0x5080), 0, 0, chip_508x},
356 {PCI_DEVICE(PCI_VENDOR_ID_MARVELL, 0x5081), 0, 0, chip_508x},
358 {PCI_DEVICE(PCI_VENDOR_ID_MARVELL, 0x6040), 0, 0, chip_604x},
359 {PCI_DEVICE(PCI_VENDOR_ID_MARVELL, 0x6041), 0, 0, chip_604x},
360 {PCI_DEVICE(PCI_VENDOR_ID_MARVELL, 0x6080), 0, 0, chip_608x},
361 {PCI_DEVICE(PCI_VENDOR_ID_MARVELL, 0x6081), 0, 0, chip_608x},
362 {} /* terminate list */
365 static struct pci_driver mv_pci_driver = {
367 .id_table = mv_pci_tbl,
368 .probe = mv_init_one,
369 .remove = ata_pci_remove_one,
376 static inline void writelfl(unsigned long data, void __iomem *addr)
379 (void) readl(addr); /* flush to avoid PCI posted write */
382 static inline void __iomem *mv_hc_base(void __iomem *base, unsigned int hc)
384 return (base + MV_SATAHC0_REG_BASE + (hc * MV_SATAHC_REG_SZ));
387 static inline void __iomem *mv_port_base(void __iomem *base, unsigned int port)
389 return (mv_hc_base(base, port >> MV_PORT_HC_SHIFT) +
390 MV_SATAHC_ARBTR_REG_SZ +
391 ((port & MV_PORT_MASK) * MV_PORT_REG_SZ));
394 static inline void __iomem *mv_ap_base(struct ata_port *ap)
396 return mv_port_base(ap->host_set->mmio_base, ap->port_no);
399 static inline int mv_get_hc_count(unsigned long hp_flags)
401 return ((hp_flags & MV_FLAG_DUAL_HC) ? 2 : 1);
404 static void mv_irq_clear(struct ata_port *ap)
409 * mv_start_dma - Enable eDMA engine
410 * @base: port base address
411 * @pp: port private data
413 * Verify the local cache of the eDMA state is accurate with an
417 * Inherited from caller.
419 static void mv_start_dma(void __iomem *base, struct mv_port_priv *pp)
421 if (!(MV_PP_FLAG_EDMA_EN & pp->pp_flags)) {
422 writelfl(EDMA_EN, base + EDMA_CMD_OFS);
423 pp->pp_flags |= MV_PP_FLAG_EDMA_EN;
425 assert(EDMA_EN & readl(base + EDMA_CMD_OFS));
429 * mv_stop_dma - Disable eDMA engine
430 * @ap: ATA channel to manipulate
432 * Verify the local cache of the eDMA state is accurate with an
436 * Inherited from caller.
438 static void mv_stop_dma(struct ata_port *ap)
440 void __iomem *port_mmio = mv_ap_base(ap);
441 struct mv_port_priv *pp = ap->private_data;
445 if (MV_PP_FLAG_EDMA_EN & pp->pp_flags) {
446 /* Disable EDMA if active. The disable bit auto clears.
448 writelfl(EDMA_DS, port_mmio + EDMA_CMD_OFS);
449 pp->pp_flags &= ~MV_PP_FLAG_EDMA_EN;
451 assert(!(EDMA_EN & readl(port_mmio + EDMA_CMD_OFS)));
454 /* now properly wait for the eDMA to stop */
455 for (i = 1000; i > 0; i--) {
456 reg = readl(port_mmio + EDMA_CMD_OFS);
457 if (!(EDMA_EN & reg)) {
464 printk(KERN_ERR "ata%u: Unable to stop eDMA\n", ap->id);
465 /* FIXME: Consider doing a reset here to recover */
470 static void mv_dump_mem(void __iomem *start, unsigned bytes)
473 for (b = 0; b < bytes; ) {
474 DPRINTK("%p: ", start + b);
475 for (w = 0; b < bytes && w < 4; w++) {
476 printk("%08x ",readl(start + b));
484 static void mv_dump_pci_cfg(struct pci_dev *pdev, unsigned bytes)
489 for (b = 0; b < bytes; ) {
490 DPRINTK("%02x: ", b);
491 for (w = 0; b < bytes && w < 4; w++) {
492 (void) pci_read_config_dword(pdev,b,&dw);
500 static void mv_dump_all_regs(void __iomem *mmio_base, int port,
501 struct pci_dev *pdev)
504 void __iomem *hc_base = mv_hc_base(mmio_base,
505 port >> MV_PORT_HC_SHIFT);
506 void __iomem *port_base;
507 int start_port, num_ports, p, start_hc, num_hcs, hc;
510 start_hc = start_port = 0;
511 num_ports = 8; /* shld be benign for 4 port devs */
514 start_hc = port >> MV_PORT_HC_SHIFT;
516 num_ports = num_hcs = 1;
518 DPRINTK("All registers for port(s) %u-%u:\n", start_port,
519 num_ports > 1 ? num_ports - 1 : start_port);
522 DPRINTK("PCI config space regs:\n");
523 mv_dump_pci_cfg(pdev, 0x68);
525 DPRINTK("PCI regs:\n");
526 mv_dump_mem(mmio_base+0xc00, 0x3c);
527 mv_dump_mem(mmio_base+0xd00, 0x34);
528 mv_dump_mem(mmio_base+0xf00, 0x4);
529 mv_dump_mem(mmio_base+0x1d00, 0x6c);
530 for (hc = start_hc; hc < start_hc + num_hcs; hc++) {
531 hc_base = mv_hc_base(mmio_base, port >> MV_PORT_HC_SHIFT);
532 DPRINTK("HC regs (HC %i):\n", hc);
533 mv_dump_mem(hc_base, 0x1c);
535 for (p = start_port; p < start_port + num_ports; p++) {
536 port_base = mv_port_base(mmio_base, p);
537 DPRINTK("EDMA regs (port %i):\n",p);
538 mv_dump_mem(port_base, 0x54);
539 DPRINTK("SATA regs (port %i):\n",p);
540 mv_dump_mem(port_base+0x300, 0x60);
545 static unsigned int mv_scr_offset(unsigned int sc_reg_in)
553 ofs = SATA_STATUS_OFS + (sc_reg_in * sizeof(u32));
556 ofs = SATA_ACTIVE_OFS; /* active is not with the others */
565 static u32 mv_scr_read(struct ata_port *ap, unsigned int sc_reg_in)
567 unsigned int ofs = mv_scr_offset(sc_reg_in);
569 if (0xffffffffU != ofs) {
570 return readl(mv_ap_base(ap) + ofs);
576 static void mv_scr_write(struct ata_port *ap, unsigned int sc_reg_in, u32 val)
578 unsigned int ofs = mv_scr_offset(sc_reg_in);
580 if (0xffffffffU != ofs) {
581 writelfl(val, mv_ap_base(ap) + ofs);
586 * mv_global_soft_reset - Perform the 6xxx global soft reset
587 * @mmio_base: base address of the HBA
589 * This routine only applies to 6xxx parts.
592 * Inherited from caller.
594 static int mv_global_soft_reset(void __iomem *mmio_base)
596 void __iomem *reg = mmio_base + PCI_MAIN_CMD_STS_OFS;
600 /* Following procedure defined in PCI "main command and status
604 writel(t | STOP_PCI_MASTER, reg);
606 for (i = 0; i < 1000; i++) {
609 if (PCI_MASTER_EMPTY & t) {
613 if (!(PCI_MASTER_EMPTY & t)) {
614 printk(KERN_ERR DRV_NAME ": PCI master won't flush\n");
622 writel(t | GLOB_SFT_RST, reg);
625 } while (!(GLOB_SFT_RST & t) && (i-- > 0));
627 if (!(GLOB_SFT_RST & t)) {
628 printk(KERN_ERR DRV_NAME ": can't set global reset\n");
633 /* clear reset and *reenable the PCI master* (not mentioned in spec) */
636 writel(t & ~(GLOB_SFT_RST | STOP_PCI_MASTER), reg);
639 } while ((GLOB_SFT_RST & t) && (i-- > 0));
641 if (GLOB_SFT_RST & t) {
642 printk(KERN_ERR DRV_NAME ": can't clear global reset\n");
650 * mv_host_stop - Host specific cleanup/stop routine.
651 * @host_set: host data structure
653 * Disable ints, cleanup host memory, call general purpose
657 * Inherited from caller.
659 static void mv_host_stop(struct ata_host_set *host_set)
661 struct mv_host_priv *hpriv = host_set->private_data;
662 struct pci_dev *pdev = to_pci_dev(host_set->dev);
664 if (hpriv->hp_flags & MV_HP_FLAG_MSI) {
665 pci_disable_msi(pdev);
670 ata_host_stop(host_set);
673 static inline void mv_priv_free(struct mv_port_priv *pp, struct device *dev)
675 dma_free_coherent(dev, MV_PORT_PRIV_DMA_SZ, pp->crpb, pp->crpb_dma);
679 * mv_port_start - Port specific init/start routine.
680 * @ap: ATA channel to manipulate
682 * Allocate and point to DMA memory, init port private memory,
686 * Inherited from caller.
688 static int mv_port_start(struct ata_port *ap)
690 struct device *dev = ap->host_set->dev;
691 struct mv_port_priv *pp;
692 void __iomem *port_mmio = mv_ap_base(ap);
697 pp = kmalloc(sizeof(*pp), GFP_KERNEL);
700 memset(pp, 0, sizeof(*pp));
702 mem = dma_alloc_coherent(dev, MV_PORT_PRIV_DMA_SZ, &mem_dma,
706 memset(mem, 0, MV_PORT_PRIV_DMA_SZ);
708 rc = ata_pad_alloc(ap, dev);
712 /* First item in chunk of DMA memory:
713 * 32-slot command request table (CRQB), 32 bytes each in size
716 pp->crqb_dma = mem_dma;
718 mem_dma += MV_CRQB_Q_SZ;
721 * 32-slot command response table (CRPB), 8 bytes each in size
724 pp->crpb_dma = mem_dma;
726 mem_dma += MV_CRPB_Q_SZ;
729 * Table of scatter-gather descriptors (ePRD), 16 bytes each
732 pp->sg_tbl_dma = mem_dma;
734 writelfl(EDMA_CFG_Q_DEPTH | EDMA_CFG_RD_BRST_EXT |
735 EDMA_CFG_WR_BUFF_LEN, port_mmio + EDMA_CFG_OFS);
737 writel((pp->crqb_dma >> 16) >> 16, port_mmio + EDMA_REQ_Q_BASE_HI_OFS);
738 writelfl(pp->crqb_dma & EDMA_REQ_Q_BASE_LO_MASK,
739 port_mmio + EDMA_REQ_Q_IN_PTR_OFS);
741 writelfl(0, port_mmio + EDMA_REQ_Q_OUT_PTR_OFS);
742 writelfl(0, port_mmio + EDMA_RSP_Q_IN_PTR_OFS);
744 writel((pp->crpb_dma >> 16) >> 16, port_mmio + EDMA_RSP_Q_BASE_HI_OFS);
745 writelfl(pp->crpb_dma & EDMA_RSP_Q_BASE_LO_MASK,
746 port_mmio + EDMA_RSP_Q_OUT_PTR_OFS);
748 pp->req_producer = pp->rsp_consumer = 0;
750 /* Don't turn on EDMA here...do it before DMA commands only. Else
751 * we'll be unable to send non-data, PIO, etc due to restricted access
754 ap->private_data = pp;
758 mv_priv_free(pp, dev);
766 * mv_port_stop - Port specific cleanup/stop routine.
767 * @ap: ATA channel to manipulate
769 * Stop DMA, cleanup port memory.
772 * This routine uses the host_set lock to protect the DMA stop.
774 static void mv_port_stop(struct ata_port *ap)
776 struct device *dev = ap->host_set->dev;
777 struct mv_port_priv *pp = ap->private_data;
780 spin_lock_irqsave(&ap->host_set->lock, flags);
782 spin_unlock_irqrestore(&ap->host_set->lock, flags);
784 ap->private_data = NULL;
785 ata_pad_free(ap, dev);
786 mv_priv_free(pp, dev);
791 * mv_fill_sg - Fill out the Marvell ePRD (scatter gather) entries
792 * @qc: queued command whose SG list to source from
794 * Populate the SG list and mark the last entry.
797 * Inherited from caller.
799 static void mv_fill_sg(struct ata_queued_cmd *qc)
801 struct mv_port_priv *pp = qc->ap->private_data;
803 struct scatterlist *sg;
805 ata_for_each_sg(sg, qc) {
809 addr = sg_dma_address(sg);
810 sg_len = sg_dma_len(sg);
812 pp->sg_tbl[i].addr = cpu_to_le32(addr & 0xffffffff);
813 pp->sg_tbl[i].addr_hi = cpu_to_le32((addr >> 16) >> 16);
814 assert(0 == (sg_len & ~MV_DMA_BOUNDARY));
815 pp->sg_tbl[i].flags_size = cpu_to_le32(sg_len);
816 if (ata_sg_is_last(sg, qc))
817 pp->sg_tbl[i].flags_size |= cpu_to_le32(EPRD_FLAG_END_OF_TBL);
823 static inline unsigned mv_inc_q_index(unsigned *index)
825 *index = (*index + 1) & MV_MAX_Q_DEPTH_MASK;
829 static inline void mv_crqb_pack_cmd(u16 *cmdw, u8 data, u8 addr, unsigned last)
831 *cmdw = data | (addr << CRQB_CMD_ADDR_SHIFT) | CRQB_CMD_CS |
832 (last ? CRQB_CMD_LAST : 0);
836 * mv_qc_prep - Host specific command preparation.
837 * @qc: queued command to prepare
839 * This routine simply redirects to the general purpose routine
840 * if command is not DMA. Else, it handles prep of the CRQB
841 * (command request block), does some sanity checking, and calls
842 * the SG load routine.
845 * Inherited from caller.
847 static void mv_qc_prep(struct ata_queued_cmd *qc)
849 struct ata_port *ap = qc->ap;
850 struct mv_port_priv *pp = ap->private_data;
852 struct ata_taskfile *tf;
855 if (ATA_PROT_DMA != qc->tf.protocol) {
859 /* the req producer index should be the same as we remember it */
860 assert(((readl(mv_ap_base(qc->ap) + EDMA_REQ_Q_IN_PTR_OFS) >>
861 EDMA_REQ_Q_PTR_SHIFT) & MV_MAX_Q_DEPTH_MASK) ==
864 /* Fill in command request block
866 if (!(qc->tf.flags & ATA_TFLAG_WRITE)) {
867 flags |= CRQB_FLAG_READ;
869 assert(MV_MAX_Q_DEPTH > qc->tag);
870 flags |= qc->tag << CRQB_TAG_SHIFT;
872 pp->crqb[pp->req_producer].sg_addr =
873 cpu_to_le32(pp->sg_tbl_dma & 0xffffffff);
874 pp->crqb[pp->req_producer].sg_addr_hi =
875 cpu_to_le32((pp->sg_tbl_dma >> 16) >> 16);
876 pp->crqb[pp->req_producer].ctrl_flags = cpu_to_le16(flags);
878 cw = &pp->crqb[pp->req_producer].ata_cmd[0];
881 /* Sadly, the CRQB cannot accomodate all registers--there are
882 * only 11 bytes...so we must pick and choose required
883 * registers based on the command. So, we drop feature and
884 * hob_feature for [RW] DMA commands, but they are needed for
885 * NCQ. NCQ will drop hob_nsect.
887 switch (tf->command) {
889 case ATA_CMD_READ_EXT:
891 case ATA_CMD_WRITE_EXT:
892 mv_crqb_pack_cmd(cw++, tf->hob_nsect, ATA_REG_NSECT, 0);
894 #ifdef LIBATA_NCQ /* FIXME: remove this line when NCQ added */
895 case ATA_CMD_FPDMA_READ:
896 case ATA_CMD_FPDMA_WRITE:
897 mv_crqb_pack_cmd(cw++, tf->hob_feature, ATA_REG_FEATURE, 0);
898 mv_crqb_pack_cmd(cw++, tf->feature, ATA_REG_FEATURE, 0);
900 #endif /* FIXME: remove this line when NCQ added */
902 /* The only other commands EDMA supports in non-queued and
903 * non-NCQ mode are: [RW] STREAM DMA and W DMA FUA EXT, none
904 * of which are defined/used by Linux. If we get here, this
907 * FIXME: modify libata to give qc_prep a return value and
913 mv_crqb_pack_cmd(cw++, tf->nsect, ATA_REG_NSECT, 0);
914 mv_crqb_pack_cmd(cw++, tf->hob_lbal, ATA_REG_LBAL, 0);
915 mv_crqb_pack_cmd(cw++, tf->lbal, ATA_REG_LBAL, 0);
916 mv_crqb_pack_cmd(cw++, tf->hob_lbam, ATA_REG_LBAM, 0);
917 mv_crqb_pack_cmd(cw++, tf->lbam, ATA_REG_LBAM, 0);
918 mv_crqb_pack_cmd(cw++, tf->hob_lbah, ATA_REG_LBAH, 0);
919 mv_crqb_pack_cmd(cw++, tf->lbah, ATA_REG_LBAH, 0);
920 mv_crqb_pack_cmd(cw++, tf->device, ATA_REG_DEVICE, 0);
921 mv_crqb_pack_cmd(cw++, tf->command, ATA_REG_CMD, 1); /* last */
923 if (!(qc->flags & ATA_QCFLAG_DMAMAP)) {
930 * mv_qc_issue - Initiate a command to the host
931 * @qc: queued command to start
933 * This routine simply redirects to the general purpose routine
934 * if command is not DMA. Else, it sanity checks our local
935 * caches of the request producer/consumer indices then enables
936 * DMA and bumps the request producer index.
939 * Inherited from caller.
941 static int mv_qc_issue(struct ata_queued_cmd *qc)
943 void __iomem *port_mmio = mv_ap_base(qc->ap);
944 struct mv_port_priv *pp = qc->ap->private_data;
947 if (ATA_PROT_DMA != qc->tf.protocol) {
948 /* We're about to send a non-EDMA capable command to the
949 * port. Turn off EDMA so there won't be problems accessing
950 * shadow block, etc registers.
953 return ata_qc_issue_prot(qc);
956 in_ptr = readl(port_mmio + EDMA_REQ_Q_IN_PTR_OFS);
958 /* the req producer index should be the same as we remember it */
959 assert(((in_ptr >> EDMA_REQ_Q_PTR_SHIFT) & MV_MAX_Q_DEPTH_MASK) ==
961 /* until we do queuing, the queue should be empty at this point */
962 assert(((in_ptr >> EDMA_REQ_Q_PTR_SHIFT) & MV_MAX_Q_DEPTH_MASK) ==
963 ((readl(port_mmio + EDMA_REQ_Q_OUT_PTR_OFS) >>
964 EDMA_REQ_Q_PTR_SHIFT) & MV_MAX_Q_DEPTH_MASK));
966 mv_inc_q_index(&pp->req_producer); /* now incr producer index */
968 mv_start_dma(port_mmio, pp);
970 /* and write the request in pointer to kick the EDMA to life */
971 in_ptr &= EDMA_REQ_Q_BASE_LO_MASK;
972 in_ptr |= pp->req_producer << EDMA_REQ_Q_PTR_SHIFT;
973 writelfl(in_ptr, port_mmio + EDMA_REQ_Q_IN_PTR_OFS);
979 * mv_get_crpb_status - get status from most recently completed cmd
980 * @ap: ATA channel to manipulate
982 * This routine is for use when the port is in DMA mode, when it
983 * will be using the CRPB (command response block) method of
984 * returning command completion information. We assert indices
985 * are good, grab status, and bump the response consumer index to
986 * prove that we're up to date.
989 * Inherited from caller.
991 static u8 mv_get_crpb_status(struct ata_port *ap)
993 void __iomem *port_mmio = mv_ap_base(ap);
994 struct mv_port_priv *pp = ap->private_data;
997 out_ptr = readl(port_mmio + EDMA_RSP_Q_OUT_PTR_OFS);
999 /* the response consumer index should be the same as we remember it */
1000 assert(((out_ptr >> EDMA_RSP_Q_PTR_SHIFT) & MV_MAX_Q_DEPTH_MASK) ==
1003 /* increment our consumer index... */
1004 pp->rsp_consumer = mv_inc_q_index(&pp->rsp_consumer);
1006 /* and, until we do NCQ, there should only be 1 CRPB waiting */
1007 assert(((readl(port_mmio + EDMA_RSP_Q_IN_PTR_OFS) >>
1008 EDMA_RSP_Q_PTR_SHIFT) & MV_MAX_Q_DEPTH_MASK) ==
1011 /* write out our inc'd consumer index so EDMA knows we're caught up */
1012 out_ptr &= EDMA_RSP_Q_BASE_LO_MASK;
1013 out_ptr |= pp->rsp_consumer << EDMA_RSP_Q_PTR_SHIFT;
1014 writelfl(out_ptr, port_mmio + EDMA_RSP_Q_OUT_PTR_OFS);
1016 /* Return ATA status register for completed CRPB */
1017 return (pp->crpb[pp->rsp_consumer].flags >> CRPB_FLAG_STATUS_SHIFT);
1021 * mv_err_intr - Handle error interrupts on the port
1022 * @ap: ATA channel to manipulate
1024 * In most cases, just clear the interrupt and move on. However,
1025 * some cases require an eDMA reset, which is done right before
1026 * the COMRESET in mv_phy_reset(). The SERR case requires a
1027 * clear of pending errors in the SATA SERROR register. Finally,
1028 * if the port disabled DMA, update our cached copy to match.
1031 * Inherited from caller.
1033 static void mv_err_intr(struct ata_port *ap)
1035 void __iomem *port_mmio = mv_ap_base(ap);
1036 u32 edma_err_cause, serr = 0;
1038 edma_err_cause = readl(port_mmio + EDMA_ERR_IRQ_CAUSE_OFS);
1040 if (EDMA_ERR_SERR & edma_err_cause) {
1041 serr = scr_read(ap, SCR_ERROR);
1042 scr_write_flush(ap, SCR_ERROR, serr);
1044 if (EDMA_ERR_SELF_DIS & edma_err_cause) {
1045 struct mv_port_priv *pp = ap->private_data;
1046 pp->pp_flags &= ~MV_PP_FLAG_EDMA_EN;
1048 DPRINTK(KERN_ERR "ata%u: port error; EDMA err cause: 0x%08x "
1049 "SERR: 0x%08x\n", ap->id, edma_err_cause, serr);
1051 /* Clear EDMA now that SERR cleanup done */
1052 writelfl(0, port_mmio + EDMA_ERR_IRQ_CAUSE_OFS);
1054 /* check for fatal here and recover if needed */
1055 if (EDMA_ERR_FATAL & edma_err_cause) {
1061 * mv_host_intr - Handle all interrupts on the given host controller
1062 * @host_set: host specific structure
1063 * @relevant: port error bits relevant to this host controller
1064 * @hc: which host controller we're to look at
1066 * Read then write clear the HC interrupt status then walk each
1067 * port connected to the HC and see if it needs servicing. Port
1068 * success ints are reported in the HC interrupt status reg, the
1069 * port error ints are reported in the higher level main
1070 * interrupt status register and thus are passed in via the
1071 * 'relevant' argument.
1074 * Inherited from caller.
1076 static void mv_host_intr(struct ata_host_set *host_set, u32 relevant,
1079 void __iomem *mmio = host_set->mmio_base;
1080 void __iomem *hc_mmio = mv_hc_base(mmio, hc);
1081 struct ata_port *ap;
1082 struct ata_queued_cmd *qc;
1084 int shift, port, port0, hard_port, handled;
1085 unsigned int err_mask;
1091 port0 = MV_PORTS_PER_HC;
1094 /* we'll need the HC success int register in most cases */
1095 hc_irq_cause = readl(hc_mmio + HC_IRQ_CAUSE_OFS);
1097 writelfl(~hc_irq_cause, hc_mmio + HC_IRQ_CAUSE_OFS);
1100 VPRINTK("ENTER, hc%u relevant=0x%08x HC IRQ cause=0x%08x\n",
1101 hc,relevant,hc_irq_cause);
1103 for (port = port0; port < port0 + MV_PORTS_PER_HC; port++) {
1104 ap = host_set->ports[port];
1105 hard_port = port & MV_PORT_MASK; /* range 0-3 */
1106 handled = 0; /* ensure ata_status is set if handled++ */
1108 if ((CRPB_DMA_DONE << hard_port) & hc_irq_cause) {
1109 /* new CRPB on the queue; just one at a time until NCQ
1111 ata_status = mv_get_crpb_status(ap);
1113 } else if ((DEV_IRQ << hard_port) & hc_irq_cause) {
1114 /* received ATA IRQ; read the status reg to clear INTRQ
1116 ata_status = readb((void __iomem *)
1117 ap->ioaddr.status_addr);
1121 err_mask = ac_err_mask(ata_status);
1123 shift = port << 1; /* (port * 2) */
1124 if (port >= MV_PORTS_PER_HC) {
1125 shift++; /* skip bit 8 in the HC Main IRQ reg */
1127 if ((PORT0_ERR << shift) & relevant) {
1129 err_mask |= AC_ERR_OTHER;
1133 if (handled && ap) {
1134 qc = ata_qc_from_tag(ap, ap->active_tag);
1136 VPRINTK("port %u IRQ found for qc, "
1137 "ata_status 0x%x\n", port,ata_status);
1138 /* mark qc status appropriately */
1139 ata_qc_complete(qc, err_mask);
1149 * @dev_instance: private data; in this case the host structure
1152 * Read the read only register to determine if any host
1153 * controllers have pending interrupts. If so, call lower level
1154 * routine to handle. Also check for PCI errors which are only
1158 * This routine holds the host_set lock while processing pending
1161 static irqreturn_t mv_interrupt(int irq, void *dev_instance,
1162 struct pt_regs *regs)
1164 struct ata_host_set *host_set = dev_instance;
1165 unsigned int hc, handled = 0, n_hcs;
1166 void __iomem *mmio = host_set->mmio_base;
1169 irq_stat = readl(mmio + HC_MAIN_IRQ_CAUSE_OFS);
1171 /* check the cases where we either have nothing pending or have read
1172 * a bogus register value which can indicate HW removal or PCI fault
1174 if (!irq_stat || (0xffffffffU == irq_stat)) {
1178 n_hcs = mv_get_hc_count(host_set->ports[0]->flags);
1179 spin_lock(&host_set->lock);
1181 for (hc = 0; hc < n_hcs; hc++) {
1182 u32 relevant = irq_stat & (HC0_IRQ_PEND << (hc * HC_SHIFT));
1184 mv_host_intr(host_set, relevant, hc);
1188 if (PCI_ERR & irq_stat) {
1189 printk(KERN_ERR DRV_NAME ": PCI ERROR; PCI IRQ cause=0x%08x\n",
1190 readl(mmio + PCI_IRQ_CAUSE_OFS));
1192 DPRINTK("All regs @ PCI error\n");
1193 mv_dump_all_regs(mmio, -1, to_pci_dev(host_set->dev));
1195 writelfl(0, mmio + PCI_IRQ_CAUSE_OFS);
1198 spin_unlock(&host_set->lock);
1200 return IRQ_RETVAL(handled);
1204 * mv_phy_reset - Perform eDMA reset followed by COMRESET
1205 * @ap: ATA channel to manipulate
1207 * Part of this is taken from __sata_phy_reset and modified to
1208 * not sleep since this routine gets called from interrupt level.
1211 * Inherited from caller. This is coded to safe to call at
1212 * interrupt level, i.e. it does not sleep.
1214 static void mv_phy_reset(struct ata_port *ap)
1216 void __iomem *port_mmio = mv_ap_base(ap);
1217 struct ata_taskfile tf;
1218 struct ata_device *dev = &ap->device[0];
1219 unsigned long timeout;
1221 VPRINTK("ENTER, port %u, mmio 0x%p\n", ap->port_no, port_mmio);
1225 writelfl(ATA_RST, port_mmio + EDMA_CMD_OFS);
1226 udelay(25); /* allow reset propagation */
1228 /* Spec never mentions clearing the bit. Marvell's driver does
1229 * clear the bit, however.
1231 writelfl(0, port_mmio + EDMA_CMD_OFS);
1233 VPRINTK("S-regs after ATA_RST: SStat 0x%08x SErr 0x%08x "
1234 "SCtrl 0x%08x\n", mv_scr_read(ap, SCR_STATUS),
1235 mv_scr_read(ap, SCR_ERROR), mv_scr_read(ap, SCR_CONTROL));
1237 /* proceed to init communications via the scr_control reg */
1238 scr_write_flush(ap, SCR_CONTROL, 0x301);
1240 scr_write_flush(ap, SCR_CONTROL, 0x300);
1241 timeout = jiffies + (HZ * 1);
1244 if ((scr_read(ap, SCR_STATUS) & 0xf) != 1)
1246 } while (time_before(jiffies, timeout));
1248 VPRINTK("S-regs after PHY wake: SStat 0x%08x SErr 0x%08x "
1249 "SCtrl 0x%08x\n", mv_scr_read(ap, SCR_STATUS),
1250 mv_scr_read(ap, SCR_ERROR), mv_scr_read(ap, SCR_CONTROL));
1252 if (sata_dev_present(ap)) {
1255 printk(KERN_INFO "ata%u: no device found (phy stat %08x)\n",
1256 ap->id, scr_read(ap, SCR_STATUS));
1257 ata_port_disable(ap);
1260 ap->cbl = ATA_CBL_SATA;
1262 tf.lbah = readb((void __iomem *) ap->ioaddr.lbah_addr);
1263 tf.lbam = readb((void __iomem *) ap->ioaddr.lbam_addr);
1264 tf.lbal = readb((void __iomem *) ap->ioaddr.lbal_addr);
1265 tf.nsect = readb((void __iomem *) ap->ioaddr.nsect_addr);
1267 dev->class = ata_dev_classify(&tf);
1268 if (!ata_dev_present(dev)) {
1269 VPRINTK("Port disabled post-sig: No device present.\n");
1270 ata_port_disable(ap);
1276 * mv_eng_timeout - Routine called by libata when SCSI times out I/O
1277 * @ap: ATA channel to manipulate
1279 * Intent is to clear all pending error conditions, reset the
1280 * chip/bus, fail the command, and move on.
1283 * This routine holds the host_set lock while failing the command.
1285 static void mv_eng_timeout(struct ata_port *ap)
1287 struct ata_queued_cmd *qc;
1288 unsigned long flags;
1290 printk(KERN_ERR "ata%u: Entering mv_eng_timeout\n",ap->id);
1291 DPRINTK("All regs @ start of eng_timeout\n");
1292 mv_dump_all_regs(ap->host_set->mmio_base, ap->port_no,
1293 to_pci_dev(ap->host_set->dev));
1295 qc = ata_qc_from_tag(ap, ap->active_tag);
1296 printk(KERN_ERR "mmio_base %p ap %p qc %p scsi_cmnd %p &cmnd %p\n",
1297 ap->host_set->mmio_base, ap, qc, qc->scsicmd,
1298 &qc->scsicmd->cmnd);
1304 printk(KERN_ERR "ata%u: BUG: timeout without command\n",
1307 /* hack alert! We cannot use the supplied completion
1308 * function from inside the ->eh_strategy_handler() thread.
1309 * libata is the only user of ->eh_strategy_handler() in
1310 * any kernel, so the default scsi_done() assumes it is
1311 * not being called from the SCSI EH.
1313 spin_lock_irqsave(&ap->host_set->lock, flags);
1314 qc->scsidone = scsi_finish_command;
1315 ata_qc_complete(qc, AC_ERR_OTHER);
1316 spin_unlock_irqrestore(&ap->host_set->lock, flags);
1321 * mv_port_init - Perform some early initialization on a single port.
1322 * @port: libata data structure storing shadow register addresses
1323 * @port_mmio: base address of the port
1325 * Initialize shadow register mmio addresses, clear outstanding
1326 * interrupts on the port, and unmask interrupts for the future
1327 * start of the port.
1330 * Inherited from caller.
1332 static void mv_port_init(struct ata_ioports *port, void __iomem *port_mmio)
1334 unsigned long shd_base = (unsigned long) port_mmio + SHD_BLK_OFS;
1337 /* PIO related setup
1339 port->data_addr = shd_base + (sizeof(u32) * ATA_REG_DATA);
1341 port->feature_addr = shd_base + (sizeof(u32) * ATA_REG_ERR);
1342 port->nsect_addr = shd_base + (sizeof(u32) * ATA_REG_NSECT);
1343 port->lbal_addr = shd_base + (sizeof(u32) * ATA_REG_LBAL);
1344 port->lbam_addr = shd_base + (sizeof(u32) * ATA_REG_LBAM);
1345 port->lbah_addr = shd_base + (sizeof(u32) * ATA_REG_LBAH);
1346 port->device_addr = shd_base + (sizeof(u32) * ATA_REG_DEVICE);
1348 port->command_addr = shd_base + (sizeof(u32) * ATA_REG_STATUS);
1349 /* special case: control/altstatus doesn't have ATA_REG_ address */
1350 port->altstatus_addr = port->ctl_addr = shd_base + SHD_CTL_AST_OFS;
1353 port->cmd_addr = port->bmdma_addr = port->scr_addr = 0;
1355 /* Clear any currently outstanding port interrupt conditions */
1356 serr_ofs = mv_scr_offset(SCR_ERROR);
1357 writelfl(readl(port_mmio + serr_ofs), port_mmio + serr_ofs);
1358 writelfl(0, port_mmio + EDMA_ERR_IRQ_CAUSE_OFS);
1360 /* unmask all EDMA error interrupts */
1361 writelfl(~0, port_mmio + EDMA_ERR_IRQ_MASK_OFS);
1363 VPRINTK("EDMA cfg=0x%08x EDMA IRQ err cause/mask=0x%08x/0x%08x\n",
1364 readl(port_mmio + EDMA_CFG_OFS),
1365 readl(port_mmio + EDMA_ERR_IRQ_CAUSE_OFS),
1366 readl(port_mmio + EDMA_ERR_IRQ_MASK_OFS));
1370 * mv_host_init - Perform some early initialization of the host.
1371 * @probe_ent: early data struct representing the host
1373 * If possible, do an early global reset of the host. Then do
1374 * our port init and clear/unmask all/relevant host interrupts.
1377 * Inherited from caller.
1379 static int mv_host_init(struct ata_probe_ent *probe_ent)
1381 int rc = 0, n_hc, port, hc;
1382 void __iomem *mmio = probe_ent->mmio_base;
1383 void __iomem *port_mmio;
1385 if ((MV_FLAG_GLBL_SFT_RST & probe_ent->host_flags) &&
1386 mv_global_soft_reset(probe_ent->mmio_base)) {
1391 n_hc = mv_get_hc_count(probe_ent->host_flags);
1392 probe_ent->n_ports = MV_PORTS_PER_HC * n_hc;
1394 for (port = 0; port < probe_ent->n_ports; port++) {
1395 port_mmio = mv_port_base(mmio, port);
1396 mv_port_init(&probe_ent->port[port], port_mmio);
1399 for (hc = 0; hc < n_hc; hc++) {
1400 void __iomem *hc_mmio = mv_hc_base(mmio, hc);
1402 VPRINTK("HC%i: HC config=0x%08x HC IRQ cause "
1403 "(before clear)=0x%08x\n", hc,
1404 readl(hc_mmio + HC_CFG_OFS),
1405 readl(hc_mmio + HC_IRQ_CAUSE_OFS));
1407 /* Clear any currently outstanding hc interrupt conditions */
1408 writelfl(0, hc_mmio + HC_IRQ_CAUSE_OFS);
1411 /* Clear any currently outstanding host interrupt conditions */
1412 writelfl(0, mmio + PCI_IRQ_CAUSE_OFS);
1414 /* and unmask interrupt generation for host regs */
1415 writelfl(PCI_UNMASK_ALL_IRQS, mmio + PCI_IRQ_MASK_OFS);
1416 writelfl(~HC_MAIN_MASKED_IRQS, mmio + HC_MAIN_IRQ_MASK_OFS);
1418 VPRINTK("HC MAIN IRQ cause/mask=0x%08x/0x%08x "
1419 "PCI int cause/mask=0x%08x/0x%08x\n",
1420 readl(mmio + HC_MAIN_IRQ_CAUSE_OFS),
1421 readl(mmio + HC_MAIN_IRQ_MASK_OFS),
1422 readl(mmio + PCI_IRQ_CAUSE_OFS),
1423 readl(mmio + PCI_IRQ_MASK_OFS));
1429 * mv_print_info - Dump key info to kernel log for perusal.
1430 * @probe_ent: early data struct representing the host
1432 * FIXME: complete this.
1435 * Inherited from caller.
1437 static void mv_print_info(struct ata_probe_ent *probe_ent)
1439 struct pci_dev *pdev = to_pci_dev(probe_ent->dev);
1440 struct mv_host_priv *hpriv = probe_ent->private_data;
1444 /* Use this to determine the HW stepping of the chip so we know
1445 * what errata to workaround
1447 pci_read_config_byte(pdev, PCI_REVISION_ID, &rev_id);
1449 pci_read_config_byte(pdev, PCI_CLASS_DEVICE, &scc);
1452 else if (scc == 0x01)
1457 dev_printk(KERN_INFO, &pdev->dev,
1458 "%u slots %u ports %s mode IRQ via %s\n",
1459 (unsigned)MV_MAX_Q_DEPTH, probe_ent->n_ports,
1460 scc_s, (MV_HP_FLAG_MSI & hpriv->hp_flags) ? "MSI" : "INTx");
1464 * mv_init_one - handle a positive probe of a Marvell host
1465 * @pdev: PCI device found
1466 * @ent: PCI device ID entry for the matched host
1469 * Inherited from caller.
1471 static int mv_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
1473 static int printed_version = 0;
1474 struct ata_probe_ent *probe_ent = NULL;
1475 struct mv_host_priv *hpriv;
1476 unsigned int board_idx = (unsigned int)ent->driver_data;
1477 void __iomem *mmio_base;
1478 int pci_dev_busy = 0, rc;
1480 if (!printed_version++)
1481 dev_printk(KERN_INFO, &pdev->dev, "version " DRV_VERSION "\n");
1483 rc = pci_enable_device(pdev);
1488 rc = pci_request_regions(pdev, DRV_NAME);
1494 probe_ent = kmalloc(sizeof(*probe_ent), GFP_KERNEL);
1495 if (probe_ent == NULL) {
1497 goto err_out_regions;
1500 memset(probe_ent, 0, sizeof(*probe_ent));
1501 probe_ent->dev = pci_dev_to_dev(pdev);
1502 INIT_LIST_HEAD(&probe_ent->node);
1504 mmio_base = pci_iomap(pdev, MV_PRIMARY_BAR, 0);
1505 if (mmio_base == NULL) {
1507 goto err_out_free_ent;
1510 hpriv = kmalloc(sizeof(*hpriv), GFP_KERNEL);
1513 goto err_out_iounmap;
1515 memset(hpriv, 0, sizeof(*hpriv));
1517 probe_ent->sht = mv_port_info[board_idx].sht;
1518 probe_ent->host_flags = mv_port_info[board_idx].host_flags;
1519 probe_ent->pio_mask = mv_port_info[board_idx].pio_mask;
1520 probe_ent->udma_mask = mv_port_info[board_idx].udma_mask;
1521 probe_ent->port_ops = mv_port_info[board_idx].port_ops;
1523 probe_ent->irq = pdev->irq;
1524 probe_ent->irq_flags = SA_SHIRQ;
1525 probe_ent->mmio_base = mmio_base;
1526 probe_ent->private_data = hpriv;
1528 /* initialize adapter */
1529 rc = mv_host_init(probe_ent);
1534 /* Enable interrupts */
1535 if (pci_enable_msi(pdev) == 0) {
1536 hpriv->hp_flags |= MV_HP_FLAG_MSI;
1541 mv_dump_pci_cfg(pdev, 0x68);
1542 mv_print_info(probe_ent);
1544 if (ata_device_add(probe_ent) == 0) {
1545 rc = -ENODEV; /* No devices discovered */
1546 goto err_out_dev_add;
1553 if (MV_HP_FLAG_MSI & hpriv->hp_flags) {
1554 pci_disable_msi(pdev);
1561 pci_iounmap(pdev, mmio_base);
1565 pci_release_regions(pdev);
1567 if (!pci_dev_busy) {
1568 pci_disable_device(pdev);
1574 static int __init mv_init(void)
1576 return pci_module_init(&mv_pci_driver);
1579 static void __exit mv_exit(void)
1581 pci_unregister_driver(&mv_pci_driver);
1584 MODULE_AUTHOR("Brett Russ");
1585 MODULE_DESCRIPTION("SCSI low-level driver for Marvell SATA controllers");
1586 MODULE_LICENSE("GPL");
1587 MODULE_DEVICE_TABLE(pci, mv_pci_tbl);
1588 MODULE_VERSION(DRV_VERSION);
1590 module_init(mv_init);
1591 module_exit(mv_exit);