| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| Jeff Garzik | 6494 | 89.78% | 33 | 43.42% |
| Tejun Heo | 415 | 5.74% | 18 | 23.68% |
| Hannes Reinecke | 161 | 2.23% | 3 | 3.95% |
| Tomer Barletz | 32 | 0.44% | 1 | 1.32% |
| Albert Lee | 30 | 0.41% | 3 | 3.95% |
| David Milburn | 26 | 0.36% | 1 | 1.32% |
| Alexander Beregalov | 24 | 0.33% | 1 | 1.32% |
| Al Viro | 11 | 0.15% | 2 | 2.63% |
| Insu Yun | 8 | 0.11% | 1 | 1.32% |
| Jiri Slaby | 7 | 0.10% | 1 | 1.32% |
| Alan Cox | 3 | 0.04% | 1 | 1.32% |
| Quentin Lambert | 3 | 0.04% | 1 | 1.32% |
| Andrew Morton | 3 | 0.04% | 1 | 1.32% |
| Akira Iguchi | 3 | 0.04% | 1 | 1.32% |
| Maximilian Attems | 3 | 0.04% | 1 | 1.32% |
| Thomas Gleixner | 2 | 0.03% | 1 | 1.32% |
| Erik Inge Bolsö | 2 | 0.03% | 1 | 1.32% |
| Gustavo A. R. Silva | 2 | 0.03% | 1 | 1.32% |
| Christoph Hellwig | 1 | 0.01% | 1 | 1.32% |
| Axel Lin | 1 | 0.01% | 1 | 1.32% |
| Arjan van de Ven | 1 | 0.01% | 1 | 1.32% |
| Joe Perches | 1 | 0.01% | 1 | 1.32% |
| Total | 7233 | 76 |
// SPDX-License-Identifier: GPL-2.0-or-later /* * sata_sx4.c - Promise SATA * * Maintained by: Tejun Heo <tj@kernel.org> * Please ALWAYS copy linux-ide@vger.kernel.org * on emails. * * Copyright 2003-2004 Red Hat, Inc. * * libata documentation is available via 'make {ps|pdf}docs', * as Documentation/driver-api/libata.rst * * Hardware documentation available under NDA. */ /* Theory of operation ------------------- The SX4 (PDC20621) chip features a single Host DMA (HDMA) copy engine, DIMM memory, and four ATA engines (one per SATA port). Data is copied to/from DIMM memory by the HDMA engine, before handing off to one (or more) of the ATA engines. The ATA engines operate solely on DIMM memory. The SX4 behaves like a PATA chip, with no SATA controls or knowledge whatsoever, leading to the presumption that PATA<->SATA bridges exist on SX4 boards, external to the PDC20621 chip itself. The chip is quite capable, supporting an XOR engine and linked hardware commands (permits a string to transactions to be submitted and waited-on as a single unit), and an optional microprocessor. The limiting factor is largely software. This Linux driver was written to multiplex the single HDMA engine to copy disk transactions into a fixed DIMM memory space, from where an ATA engine takes over. As a result, each WRITE looks like this: submit HDMA packet to hardware hardware copies data from system memory to DIMM hardware raises interrupt submit ATA packet to hardware hardware executes ATA WRITE command, w/ data in DIMM hardware raises interrupt and each READ looks like this: submit ATA packet to hardware hardware executes ATA READ command, w/ data in DIMM hardware raises interrupt submit HDMA packet to hardware hardware copies data from DIMM to system memory hardware raises interrupt This is a very slow, lock-step way of doing things that can certainly be improved by motivated kernel hackers. */ #include <linux/kernel.h> #include <linux/module.h> #include <linux/pci.h> #include <linux/slab.h> #include <linux/blkdev.h> #include <linux/delay.h> #include <linux/interrupt.h> #include <linux/device.h> #include <scsi/scsi_host.h> #include <scsi/scsi_cmnd.h> #include <linux/libata.h> #include "sata_promise.h" #define DRV_NAME "sata_sx4" #define DRV_VERSION "0.12" static int dimm_test; module_param(dimm_test, int, 0644); MODULE_PARM_DESC(dimm_test, "Enable DIMM test during startup (1 = enabled)"); enum { PDC_MMIO_BAR = 3, PDC_DIMM_BAR = 4, PDC_PRD_TBL = 0x44, /* Direct command DMA table addr */ PDC_PKT_SUBMIT = 0x40, /* Command packet pointer addr */ PDC_HDMA_PKT_SUBMIT = 0x100, /* Host DMA packet pointer addr */ PDC_INT_SEQMASK = 0x40, /* Mask of asserted SEQ INTs */ PDC_HDMA_CTLSTAT = 0x12C, /* Host DMA control / status */ PDC_CTLSTAT = 0x60, /* IDEn control / status */ PDC_20621_SEQCTL = 0x400, PDC_20621_SEQMASK = 0x480, PDC_20621_GENERAL_CTL = 0x484, PDC_20621_PAGE_SIZE = (32 * 1024), /* chosen, not constant, values; we design our own DIMM mem map */ PDC_20621_DIMM_WINDOW = 0x0C, /* page# for 32K DIMM window */ PDC_20621_DIMM_BASE = 0x00200000, PDC_20621_DIMM_DATA = (64 * 1024), PDC_DIMM_DATA_STEP = (256 * 1024), PDC_DIMM_WINDOW_STEP = (8 * 1024), PDC_DIMM_HOST_PRD = (6 * 1024), PDC_DIMM_HOST_PKT = (128 * 0), PDC_DIMM_HPKT_PRD = (128 * 1), PDC_DIMM_ATA_PKT = (128 * 2), PDC_DIMM_APKT_PRD = (128 * 3), PDC_DIMM_HEADER_SZ = PDC_DIMM_APKT_PRD + 128, PDC_PAGE_WINDOW = 0x40, PDC_PAGE_DATA = PDC_PAGE_WINDOW + (PDC_20621_DIMM_DATA / PDC_20621_PAGE_SIZE), PDC_PAGE_SET = PDC_DIMM_DATA_STEP / PDC_20621_PAGE_SIZE, PDC_CHIP0_OFS = 0xC0000, /* offset of chip #0 */ PDC_20621_ERR_MASK = (1<<19) | (1<<20) | (1<<21) | (1<<22) | (1<<23), board_20621 = 0, /* FastTrak S150 SX4 */ PDC_MASK_INT = (1 << 10), /* HDMA/ATA mask int */ PDC_RESET = (1 << 11), /* HDMA/ATA reset */ PDC_DMA_ENABLE = (1 << 7), /* DMA start/stop */ PDC_MAX_HDMA = 32, PDC_HDMA_Q_MASK = (PDC_MAX_HDMA - 1), PDC_DIMM0_SPD_DEV_ADDRESS = 0x50, PDC_DIMM1_SPD_DEV_ADDRESS = 0x51, PDC_I2C_CONTROL = 0x48, PDC_I2C_ADDR_DATA = 0x4C, PDC_DIMM0_CONTROL = 0x80, PDC_DIMM1_CONTROL = 0x84, PDC_SDRAM_CONTROL = 0x88, PDC_I2C_WRITE = 0, /* master -> slave */ PDC_I2C_READ = (1 << 6), /* master <- slave */ PDC_I2C_START = (1 << 7), /* start I2C proto */ PDC_I2C_MASK_INT = (1 << 5), /* mask I2C interrupt */ PDC_I2C_COMPLETE = (1 << 16), /* I2C normal compl. */ PDC_I2C_NO_ACK = (1 << 20), /* slave no-ack addr */ PDC_DIMM_SPD_SUBADDRESS_START = 0x00, PDC_DIMM_SPD_SUBADDRESS_END = 0x7F, PDC_DIMM_SPD_ROW_NUM = 3, PDC_DIMM_SPD_COLUMN_NUM = 4, PDC_DIMM_SPD_MODULE_ROW = 5, PDC_DIMM_SPD_TYPE = 11, PDC_DIMM_SPD_FRESH_RATE = 12, PDC_DIMM_SPD_BANK_NUM = 17, PDC_DIMM_SPD_CAS_LATENCY = 18, PDC_DIMM_SPD_ATTRIBUTE = 21, PDC_DIMM_SPD_ROW_PRE_CHARGE = 27, PDC_DIMM_SPD_ROW_ACTIVE_DELAY = 28, PDC_DIMM_SPD_RAS_CAS_DELAY = 29, PDC_DIMM_SPD_ACTIVE_PRECHARGE = 30, PDC_DIMM_SPD_SYSTEM_FREQ = 126, PDC_CTL_STATUS = 0x08, PDC_DIMM_WINDOW_CTLR = 0x0C, PDC_TIME_CONTROL = 0x3C, PDC_TIME_PERIOD = 0x40, PDC_TIME_COUNTER = 0x44, PDC_GENERAL_CTLR = 0x484, PCI_PLL_INIT = 0x8A531824, PCI_X_TCOUNT = 0xEE1E5CFF, /* PDC_TIME_CONTROL bits */ PDC_TIMER_BUZZER = (1 << 10), PDC_TIMER_MODE_PERIODIC = 0, /* bits 9:8 == 00 */ PDC_TIMER_MODE_ONCE = (1 << 8), /* bits 9:8 == 01 */ PDC_TIMER_ENABLE = (1 << 7), PDC_TIMER_MASK_INT = (1 << 5), PDC_TIMER_SEQ_MASK = 0x1f, /* SEQ ID for timer */ PDC_TIMER_DEFAULT = PDC_TIMER_MODE_ONCE | PDC_TIMER_ENABLE | PDC_TIMER_MASK_INT, }; #define ECC_ERASE_BUF_SZ (128 * 1024) struct pdc_port_priv { u8 dimm_buf[(ATA_PRD_SZ * ATA_MAX_PRD) + 512]; u8 *pkt; dma_addr_t pkt_dma; }; struct pdc_host_priv { unsigned int doing_hdma; unsigned int hdma_prod; unsigned int hdma_cons; struct { struct ata_queued_cmd *qc; unsigned int seq; unsigned long pkt_ofs; } hdma[32]; }; static int pdc_sata_init_one(struct pci_dev *pdev, const struct pci_device_id *ent); static void pdc_error_handler(struct ata_port *ap); static void pdc_freeze(struct ata_port *ap); static void pdc_thaw(struct ata_port *ap); static int pdc_port_start(struct ata_port *ap); static enum ata_completion_errors pdc20621_qc_prep(struct ata_queued_cmd *qc); static void pdc_tf_load_mmio(struct ata_port *ap, const struct ata_taskfile *tf); static void pdc_exec_command_mmio(struct ata_port *ap, const struct ata_taskfile *tf); static unsigned int pdc20621_dimm_init(struct ata_host *host); static int pdc20621_detect_dimm(struct ata_host *host); static unsigned int pdc20621_i2c_read(struct ata_host *host, u32 device, u32 subaddr, u32 *pdata); static int pdc20621_prog_dimm0(struct ata_host *host); static unsigned int pdc20621_prog_dimm_global(struct ata_host *host); static void pdc20621_get_from_dimm(struct ata_host *host, void *psource, u32 offset, u32 size); static void pdc20621_put_to_dimm(struct ata_host *host, void *psource, u32 offset, u32 size); static void pdc20621_irq_clear(struct ata_port *ap); static unsigned int pdc20621_qc_issue(struct ata_queued_cmd *qc); static int pdc_softreset(struct ata_link *link, unsigned int *class, unsigned long deadline); static void pdc_post_internal_cmd(struct ata_queued_cmd *qc); static int pdc_check_atapi_dma(struct ata_queued_cmd *qc); static struct scsi_host_template pdc_sata_sht = { ATA_BASE_SHT(DRV_NAME), .sg_tablesize = LIBATA_MAX_PRD, .dma_boundary = ATA_DMA_BOUNDARY, }; /* TODO: inherit from base port_ops after converting to new EH */ static struct ata_port_operations pdc_20621_ops = { .inherits = &ata_sff_port_ops, .check_atapi_dma = pdc_check_atapi_dma, .qc_prep = pdc20621_qc_prep, .qc_issue = pdc20621_qc_issue, .freeze = pdc_freeze, .thaw = pdc_thaw, .softreset = pdc_softreset, .error_handler = pdc_error_handler, .lost_interrupt = ATA_OP_NULL, .post_internal_cmd = pdc_post_internal_cmd, .port_start = pdc_port_start, .sff_tf_load = pdc_tf_load_mmio, .sff_exec_command = pdc_exec_command_mmio, .sff_irq_clear = pdc20621_irq_clear, }; static const struct ata_port_info pdc_port_info[] = { /* board_20621 */ { .flags = ATA_FLAG_SATA | ATA_FLAG_NO_ATAPI | ATA_FLAG_PIO_POLLING, .pio_mask = ATA_PIO4, .mwdma_mask = ATA_MWDMA2, .udma_mask = ATA_UDMA6, .port_ops = &pdc_20621_ops, }, }; static const struct pci_device_id pdc_sata_pci_tbl[] = { { PCI_VDEVICE(PROMISE, 0x6622), board_20621 }, { } /* terminate list */ }; static struct pci_driver pdc_sata_pci_driver = { .name = DRV_NAME, .id_table = pdc_sata_pci_tbl, .probe = pdc_sata_init_one, .remove = ata_pci_remove_one, }; static int pdc_port_start(struct ata_port *ap) { struct device *dev = ap->host->dev; struct pdc_port_priv *pp; pp = devm_kzalloc(dev, sizeof(*pp), GFP_KERNEL); if (!pp) return -ENOMEM; pp->pkt = dmam_alloc_coherent(dev, 128, &pp->pkt_dma, GFP_KERNEL); if (!pp->pkt) return -ENOMEM; ap->private_data = pp; return 0; } static inline void pdc20621_ata_sg(u8 *buf, unsigned int portno, unsigned int total_len) { u32 addr; unsigned int dw = PDC_DIMM_APKT_PRD >> 2; __le32 *buf32 = (__le32 *) buf; /* output ATA packet S/G table */ addr = PDC_20621_DIMM_BASE + PDC_20621_DIMM_DATA + (PDC_DIMM_DATA_STEP * portno); buf32[dw] = cpu_to_le32(addr); buf32[dw + 1] = cpu_to_le32(total_len | ATA_PRD_EOT); } static inline void pdc20621_host_sg(u8 *buf, unsigned int portno, unsigned int total_len) { u32 addr; unsigned int dw = PDC_DIMM_HPKT_PRD >> 2; __le32 *buf32 = (__le32 *) buf; /* output Host DMA packet S/G table */ addr = PDC_20621_DIMM_BASE + PDC_20621_DIMM_DATA + (PDC_DIMM_DATA_STEP * portno); buf32[dw] = cpu_to_le32(addr); buf32[dw + 1] = cpu_to_le32(total_len | ATA_PRD_EOT); } static inline unsigned int pdc20621_ata_pkt(struct ata_taskfile *tf, unsigned int devno, u8 *buf, unsigned int portno) { unsigned int i, dw; __le32 *buf32 = (__le32 *) buf; u8 dev_reg; unsigned int dimm_sg = PDC_20621_DIMM_BASE + (PDC_DIMM_WINDOW_STEP * portno) + PDC_DIMM_APKT_PRD; i = PDC_DIMM_ATA_PKT; /* * Set up ATA packet */ if ((tf->protocol == ATA_PROT_DMA) && (!(tf->flags & ATA_TFLAG_WRITE))) buf[i++] = PDC_PKT_READ; else if (tf->protocol == ATA_PROT_NODATA) buf[i++] = PDC_PKT_NODATA; else buf[i++] = 0; buf[i++] = 0; /* reserved */ buf[i++] = portno + 1; /* seq. id */ buf[i++] = 0xff; /* delay seq. id */ /* dimm dma S/G, and next-pkt */ dw = i >> 2; if (tf->protocol == ATA_PROT_NODATA) buf32[dw] = 0; else buf32[dw] = cpu_to_le32(dimm_sg); buf32[dw + 1] = 0; i += 8; if (devno == 0) dev_reg = ATA_DEVICE_OBS; else dev_reg = ATA_DEVICE_OBS | ATA_DEV1; /* select device */ buf[i++] = (1 << 5) | PDC_PKT_CLEAR_BSY | ATA_REG_DEVICE; buf[i++] = dev_reg; /* device control register */ buf[i++] = (1 << 5) | PDC_REG_DEVCTL; buf[i++] = tf->ctl; return i; } static inline void pdc20621_host_pkt(struct ata_taskfile *tf, u8 *buf, unsigned int portno) { unsigned int dw; u32 tmp; __le32 *buf32 = (__le32 *) buf; unsigned int host_sg = PDC_20621_DIMM_BASE + (PDC_DIMM_WINDOW_STEP * portno) + PDC_DIMM_HOST_PRD; unsigned int dimm_sg = PDC_20621_DIMM_BASE + (PDC_DIMM_WINDOW_STEP * portno) + PDC_DIMM_HPKT_PRD; dw = PDC_DIMM_HOST_PKT >> 2; /* * Set up Host DMA packet */ if ((tf->protocol == ATA_PROT_DMA) && (!(tf->flags & ATA_TFLAG_WRITE))) tmp = PDC_PKT_READ; else tmp = 0; tmp |= ((portno + 1 + 4) << 16); /* seq. id */ tmp |= (0xff << 24); /* delay seq. id */ buf32[dw + 0] = cpu_to_le32(tmp); buf32[dw + 1] = cpu_to_le32(host_sg); buf32[dw + 2] = cpu_to_le32(dimm_sg); buf32[dw + 3] = 0; } static void pdc20621_dma_prep(struct ata_queued_cmd *qc) { struct scatterlist *sg; struct ata_port *ap = qc->ap; struct pdc_port_priv *pp = ap->private_data; void __iomem *mmio = ap->host->iomap[PDC_MMIO_BAR]; void __iomem *dimm_mmio = ap->host->iomap[PDC_DIMM_BAR]; unsigned int portno = ap->port_no; unsigned int i, si, idx, total_len = 0, sgt_len; __le32 *buf = (__le32 *) &pp->dimm_buf[PDC_DIMM_HEADER_SZ]; WARN_ON(!(qc->flags & ATA_QCFLAG_DMAMAP)); /* hard-code chip #0 */ mmio += PDC_CHIP0_OFS; /* * Build S/G table */ idx = 0; for_each_sg(qc->sg, sg, qc->n_elem, si) { buf[idx++] = cpu_to_le32(sg_dma_address(sg)); buf[idx++] = cpu_to_le32(sg_dma_len(sg)); total_len += sg_dma_len(sg); } buf[idx - 1] |= cpu_to_le32(ATA_PRD_EOT); sgt_len = idx * 4; /* * Build ATA, host DMA packets */ pdc20621_host_sg(&pp->dimm_buf[0], portno, total_len); pdc20621_host_pkt(&qc->tf, &pp->dimm_buf[0], portno); pdc20621_ata_sg(&pp->dimm_buf[0], portno, total_len); i = pdc20621_ata_pkt(&qc->tf, qc->dev->devno, &pp->dimm_buf[0], portno); if (qc->tf.flags & ATA_TFLAG_LBA48) i = pdc_prep_lba48(&qc->tf, &pp->dimm_buf[0], i); else i = pdc_prep_lba28(&qc->tf, &pp->dimm_buf[0], i); pdc_pkt_footer(&qc->tf, &pp->dimm_buf[0], i); /* copy three S/G tables and two packets to DIMM MMIO window */ memcpy_toio(dimm_mmio + (portno * PDC_DIMM_WINDOW_STEP), &pp->dimm_buf, PDC_DIMM_HEADER_SZ); memcpy_toio(dimm_mmio + (portno * PDC_DIMM_WINDOW_STEP) + PDC_DIMM_HOST_PRD, &pp->dimm_buf[PDC_DIMM_HEADER_SZ], sgt_len); /* force host FIFO dump */ writel(0x00000001, mmio + PDC_20621_GENERAL_CTL); readl(dimm_mmio); /* MMIO PCI posting flush */ ata_port_dbg(ap, "ata pkt buf ofs %u, prd size %u, mmio copied\n", i, sgt_len); } static void pdc20621_nodata_prep(struct ata_queued_cmd *qc) { struct ata_port *ap = qc->ap; struct pdc_port_priv *pp = ap->private_data; void __iomem *mmio = ap->host->iomap[PDC_MMIO_BAR]; void __iomem *dimm_mmio = ap->host->iomap[PDC_DIMM_BAR]; unsigned int portno = ap->port_no; unsigned int i; /* hard-code chip #0 */ mmio += PDC_CHIP0_OFS; i = pdc20621_ata_pkt(&qc->tf, qc->dev->devno, &pp->dimm_buf[0], portno); if (qc->tf.flags & ATA_TFLAG_LBA48) i = pdc_prep_lba48(&qc->tf, &pp->dimm_buf[0], i); else i = pdc_prep_lba28(&qc->tf, &pp->dimm_buf[0], i); pdc_pkt_footer(&qc->tf, &pp->dimm_buf[0], i); /* copy three S/G tables and two packets to DIMM MMIO window */ memcpy_toio(dimm_mmio + (portno * PDC_DIMM_WINDOW_STEP), &pp->dimm_buf, PDC_DIMM_HEADER_SZ); /* force host FIFO dump */ writel(0x00000001, mmio + PDC_20621_GENERAL_CTL); readl(dimm_mmio); /* MMIO PCI posting flush */ ata_port_dbg(ap, "ata pkt buf ofs %u, mmio copied\n", i); } static enum ata_completion_errors pdc20621_qc_prep(struct ata_queued_cmd *qc) { switch (qc->tf.protocol) { case ATA_PROT_DMA: pdc20621_dma_prep(qc); break; case ATA_PROT_NODATA: pdc20621_nodata_prep(qc); break; default: break; } return AC_ERR_OK; } static void __pdc20621_push_hdma(struct ata_queued_cmd *qc, unsigned int seq, u32 pkt_ofs) { struct ata_port *ap = qc->ap; struct ata_host *host = ap->host; void __iomem *mmio = host->iomap[PDC_MMIO_BAR]; /* hard-code chip #0 */ mmio += PDC_CHIP0_OFS; writel(0x00000001, mmio + PDC_20621_SEQCTL + (seq * 4)); readl(mmio + PDC_20621_SEQCTL + (seq * 4)); /* flush */ writel(pkt_ofs, mmio + PDC_HDMA_PKT_SUBMIT); readl(mmio + PDC_HDMA_PKT_SUBMIT); /* flush */ } static void pdc20621_push_hdma(struct ata_queued_cmd *qc, unsigned int seq, u32 pkt_ofs) { struct ata_port *ap = qc->ap; struct pdc_host_priv *pp = ap->host->private_data; unsigned int idx = pp->hdma_prod & PDC_HDMA_Q_MASK; if (!pp->doing_hdma) { __pdc20621_push_hdma(qc, seq, pkt_ofs); pp->doing_hdma = 1; return; } pp->hdma[idx].qc = qc; pp->hdma[idx].seq = seq; pp->hdma[idx].pkt_ofs = pkt_ofs; pp->hdma_prod++; } static void pdc20621_pop_hdma(struct ata_queued_cmd *qc) { struct ata_port *ap = qc->ap; struct pdc_host_priv *pp = ap->host->private_data; unsigned int idx = pp->hdma_cons & PDC_HDMA_Q_MASK; /* if nothing on queue, we're done */ if (pp->hdma_prod == pp->hdma_cons) { pp->doing_hdma = 0; return; } __pdc20621_push_hdma(pp->hdma[idx].qc, pp->hdma[idx].seq, pp->hdma[idx].pkt_ofs); pp->hdma_cons++; } static void pdc20621_dump_hdma(struct ata_queued_cmd *qc) { struct ata_port *ap = qc->ap; unsigned int port_no = ap->port_no; void __iomem *dimm_mmio = ap->host->iomap[PDC_DIMM_BAR]; dimm_mmio += (port_no * PDC_DIMM_WINDOW_STEP); dimm_mmio += PDC_DIMM_HOST_PKT; ata_port_dbg(ap, "HDMA 0x%08X 0x%08X 0x%08X 0x%08X\n", readl(dimm_mmio), readl(dimm_mmio + 4), readl(dimm_mmio + 8), readl(dimm_mmio + 12)); } static void pdc20621_packet_start(struct ata_queued_cmd *qc) { struct ata_port *ap = qc->ap; struct ata_host *host = ap->host; unsigned int port_no = ap->port_no; void __iomem *mmio = host->iomap[PDC_MMIO_BAR]; unsigned int rw = (qc->tf.flags & ATA_TFLAG_WRITE); u8 seq = (u8) (port_no + 1); unsigned int port_ofs; /* hard-code chip #0 */ mmio += PDC_CHIP0_OFS; wmb(); /* flush PRD, pkt writes */ port_ofs = PDC_20621_DIMM_BASE + (PDC_DIMM_WINDOW_STEP * port_no); /* if writing, we (1) DMA to DIMM, then (2) do ATA command */ if (rw && qc->tf.protocol == ATA_PROT_DMA) { seq += 4; pdc20621_dump_hdma(qc); pdc20621_push_hdma(qc, seq, port_ofs + PDC_DIMM_HOST_PKT); ata_port_dbg(ap, "queued ofs 0x%x (%u), seq %u\n", port_ofs + PDC_DIMM_HOST_PKT, port_ofs + PDC_DIMM_HOST_PKT, seq); } else { writel(0x00000001, mmio + PDC_20621_SEQCTL + (seq * 4)); readl(mmio + PDC_20621_SEQCTL + (seq * 4)); /* flush */ writel(port_ofs + PDC_DIMM_ATA_PKT, ap->ioaddr.cmd_addr + PDC_PKT_SUBMIT); readl(ap->ioaddr.cmd_addr + PDC_PKT_SUBMIT); ata_port_dbg(ap, "submitted ofs 0x%x (%u), seq %u\n", port_ofs + PDC_DIMM_ATA_PKT, port_ofs + PDC_DIMM_ATA_PKT, seq); } } static unsigned int pdc20621_qc_issue(struct ata_queued_cmd *qc) { switch (qc->tf.protocol) { case ATA_PROT_NODATA: if (qc->tf.flags & ATA_TFLAG_POLLING) break; fallthrough; case ATA_PROT_DMA: pdc20621_packet_start(qc); return 0; case ATAPI_PROT_DMA: BUG(); break; default: break; } return ata_sff_qc_issue(qc); } static inline unsigned int pdc20621_host_intr(struct ata_port *ap, struct ata_queued_cmd *qc, unsigned int doing_hdma, void __iomem *mmio) { unsigned int port_no = ap->port_no; unsigned int port_ofs = PDC_20621_DIMM_BASE + (PDC_DIMM_WINDOW_STEP * port_no); u8 status; unsigned int handled = 0; if ((qc->tf.protocol == ATA_PROT_DMA) && /* read */ (!(qc->tf.flags & ATA_TFLAG_WRITE))) { /* step two - DMA from DIMM to host */ if (doing_hdma) { ata_port_dbg(ap, "read hdma, 0x%x 0x%x\n", readl(mmio + 0x104), readl(mmio + PDC_HDMA_CTLSTAT)); /* get drive status; clear intr; complete txn */ qc->err_mask |= ac_err_mask(ata_wait_idle(ap)); ata_qc_complete(qc); pdc20621_pop_hdma(qc); } /* step one - exec ATA command */ else { u8 seq = (u8) (port_no + 1 + 4); ata_port_dbg(ap, "read ata, 0x%x 0x%x\n", readl(mmio + 0x104), readl(mmio + PDC_HDMA_CTLSTAT)); /* submit hdma pkt */ pdc20621_dump_hdma(qc); pdc20621_push_hdma(qc, seq, port_ofs + PDC_DIMM_HOST_PKT); } handled = 1; } else if (qc->tf.protocol == ATA_PROT_DMA) { /* write */ /* step one - DMA from host to DIMM */ if (doing_hdma) { u8 seq = (u8) (port_no + 1); ata_port_dbg(ap, "write hdma, 0x%x 0x%x\n", readl(mmio + 0x104), readl(mmio + PDC_HDMA_CTLSTAT)); /* submit ata pkt */ writel(0x00000001, mmio + PDC_20621_SEQCTL + (seq * 4)); readl(mmio + PDC_20621_SEQCTL + (seq * 4)); writel(port_ofs + PDC_DIMM_ATA_PKT, ap->ioaddr.cmd_addr + PDC_PKT_SUBMIT); readl(ap->ioaddr.cmd_addr + PDC_PKT_SUBMIT); } /* step two - execute ATA command */ else { ata_port_dbg(ap, "write ata, 0x%x 0x%x\n", readl(mmio + 0x104), readl(mmio + PDC_HDMA_CTLSTAT)); /* get drive status; clear intr; complete txn */ qc->err_mask |= ac_err_mask(ata_wait_idle(ap)); ata_qc_complete(qc); pdc20621_pop_hdma(qc); } handled = 1; /* command completion, but no data xfer */ } else if (qc->tf.protocol == ATA_PROT_NODATA) { status = ata_sff_busy_wait(ap, ATA_BUSY | ATA_DRQ, 1000); ata_port_dbg(ap, "BUS_NODATA (drv_stat 0x%X)\n", status); qc->err_mask |= ac_err_mask(status); ata_qc_complete(qc); handled = 1; } else { ap->stats.idle_irq++; } return handled; } static void pdc20621_irq_clear(struct ata_port *ap) { ioread8(ap->ioaddr.status_addr); } static irqreturn_t pdc20621_interrupt(int irq, void *dev_instance) { struct ata_host *host = dev_instance; struct ata_port *ap; u32 mask = 0; unsigned int i, tmp, port_no; unsigned int handled = 0; void __iomem *mmio_base; if (!host || !host->iomap[PDC_MMIO_BAR]) return IRQ_NONE; mmio_base = host->iomap[PDC_MMIO_BAR]; /* reading should also clear interrupts */ mmio_base += PDC_CHIP0_OFS; mask = readl(mmio_base + PDC_20621_SEQMASK); if (mask == 0xffffffff) return IRQ_NONE; mask &= 0xffff; /* only 16 tags possible */ if (!mask) return IRQ_NONE; spin_lock(&host->lock); for (i = 1; i < 9; i++) { port_no = i - 1; if (port_no > 3) port_no -= 4; if (port_no >= host->n_ports) ap = NULL; else ap = host->ports[port_no]; tmp = mask & (1 << i); if (ap) ata_port_dbg(ap, "seq %u, tmp %x\n", i, tmp); if (tmp && ap) { struct ata_queued_cmd *qc; qc = ata_qc_from_tag(ap, ap->link.active_tag); if (qc && (!(qc->tf.flags & ATA_TFLAG_POLLING))) handled += pdc20621_host_intr(ap, qc, (i > 4), mmio_base); } } spin_unlock(&host->lock); return IRQ_RETVAL(handled); } static void pdc_freeze(struct ata_port *ap) { void __iomem *mmio = ap->ioaddr.cmd_addr; u32 tmp; /* FIXME: if all 4 ATA engines are stopped, also stop HDMA engine */ tmp = readl(mmio + PDC_CTLSTAT); tmp |= PDC_MASK_INT; tmp &= ~PDC_DMA_ENABLE; writel(tmp, mmio + PDC_CTLSTAT); readl(mmio + PDC_CTLSTAT); /* flush */ } static void pdc_thaw(struct ata_port *ap) { void __iomem *mmio = ap->ioaddr.cmd_addr; u32 tmp; /* FIXME: start HDMA engine, if zero ATA engines running */ /* clear IRQ */ ioread8(ap->ioaddr.status_addr); /* turn IRQ back on */ tmp = readl(mmio + PDC_CTLSTAT); tmp &= ~PDC_MASK_INT; writel(tmp, mmio + PDC_CTLSTAT); readl(mmio + PDC_CTLSTAT); /* flush */ } static void pdc_reset_port(struct ata_port *ap) { void __iomem *mmio = ap->ioaddr.cmd_addr + PDC_CTLSTAT; unsigned int i; u32 tmp; /* FIXME: handle HDMA copy engine */ for (i = 11; i > 0; i--) { tmp = readl(mmio); if (tmp & PDC_RESET) break; udelay(100); tmp |= PDC_RESET; writel(tmp, mmio); } tmp &= ~PDC_RESET; writel(tmp, mmio); readl(mmio); /* flush */ } static int pdc_softreset(struct ata_link *link, unsigned int *class, unsigned long deadline) { pdc_reset_port(link->ap); return ata_sff_softreset(link, class, deadline); } static void pdc_error_handler(struct ata_port *ap) { if (!(ap->pflags & ATA_PFLAG_FROZEN)) pdc_reset_port(ap); ata_sff_error_handler(ap); } static void pdc_post_internal_cmd(struct ata_queued_cmd *qc) { struct ata_port *ap = qc->ap; /* make DMA engine forget about the failed command */ if (qc->flags & ATA_QCFLAG_FAILED) pdc_reset_port(ap); } static int pdc_check_atapi_dma(struct ata_queued_cmd *qc) { u8 *scsicmd = qc->scsicmd->cmnd; int pio = 1; /* atapi dma off by default */ /* Whitelist commands that may use DMA. */ switch (scsicmd[0]) { case WRITE_12: case WRITE_10: case WRITE_6: case READ_12: case READ_10: case READ_6: case 0xad: /* READ_DVD_STRUCTURE */ case 0xbe: /* READ_CD */ pio = 0; } /* -45150 (FFFF4FA2) to -1 (FFFFFFFF) shall use PIO mode */ if (scsicmd[0] == WRITE_10) { unsigned int lba = (scsicmd[2] << 24) | (scsicmd[3] << 16) | (scsicmd[4] << 8) | scsicmd[5]; if (lba >= 0xFFFF4FA2) pio = 1; } return pio; } static void pdc_tf_load_mmio(struct ata_port *ap, const struct ata_taskfile *tf) { WARN_ON(tf->protocol == ATA_PROT_DMA || tf->protocol == ATAPI_PROT_DMA); ata_sff_tf_load(ap, tf); } static void pdc_exec_command_mmio(struct ata_port *ap, const struct ata_taskfile *tf) { WARN_ON(tf->protocol == ATA_PROT_DMA || tf->protocol == ATAPI_PROT_DMA); ata_sff_exec_command(ap, tf); } static void pdc_sata_setup_port(struct ata_ioports *port, void __iomem *base) { port->cmd_addr = base; port->data_addr = base; port->feature_addr = port->error_addr = base + 0x4; port->nsect_addr = base + 0x8; port->lbal_addr = base + 0xc; port->lbam_addr = base + 0x10; port->lbah_addr = base + 0x14; port->device_addr = base + 0x18; port->command_addr = port->status_addr = base + 0x1c; port->altstatus_addr = port->ctl_addr = base + 0x38; } static void pdc20621_get_from_dimm(struct ata_host *host, void *psource, u32 offset, u32 size) { u32 window_size; u16 idx; u8 page_mask; long dist; void __iomem *mmio = host->iomap[PDC_MMIO_BAR]; void __iomem *dimm_mmio = host->iomap[PDC_DIMM_BAR]; /* hard-code chip #0 */ mmio += PDC_CHIP0_OFS; page_mask = 0x00; window_size = 0x2000 * 4; /* 32K byte uchar size */ idx = (u16) (offset / window_size); writel(0x01, mmio + PDC_GENERAL_CTLR); readl(mmio + PDC_GENERAL_CTLR); writel(((idx) << page_mask), mmio + PDC_DIMM_WINDOW_CTLR); readl(mmio + PDC_DIMM_WINDOW_CTLR); offset -= (idx * window_size); idx++; dist = ((long) (window_size - (offset + size))) >= 0 ? size : (long) (window_size - offset); memcpy_fromio(psource, dimm_mmio + offset / 4, dist); psource += dist; size -= dist; for (; (long) size >= (long) window_size ;) { writel(0x01, mmio + PDC_GENERAL_CTLR); readl(mmio + PDC_GENERAL_CTLR); writel(((idx) << page_mask), mmio + PDC_DIMM_WINDOW_CTLR); readl(mmio + PDC_DIMM_WINDOW_CTLR); memcpy_fromio(psource, dimm_mmio, window_size / 4); psource += window_size; size -= window_size; idx++; } if (size) { writel(0x01, mmio + PDC_GENERAL_CTLR); readl(mmio + PDC_GENERAL_CTLR); writel(((idx) << page_mask), mmio + PDC_DIMM_WINDOW_CTLR); readl(mmio + PDC_DIMM_WINDOW_CTLR); memcpy_fromio(psource, dimm_mmio, size / 4); } } static void pdc20621_put_to_dimm(struct ata_host *host, void *psource, u32 offset, u32 size) { u32 window_size; u16 idx; u8 page_mask; long dist; void __iomem *mmio = host->iomap[PDC_MMIO_BAR]; void __iomem *dimm_mmio = host->iomap[PDC_DIMM_BAR]; /* hard-code chip #0 */ mmio += PDC_CHIP0_OFS; page_mask = 0x00; window_size = 0x2000 * 4; /* 32K byte uchar size */ idx = (u16) (offset / window_size); writel(((idx) << page_mask), mmio + PDC_DIMM_WINDOW_CTLR); readl(mmio + PDC_DIMM_WINDOW_CTLR); offset -= (idx * window_size); idx++; dist = ((long)(s32)(window_size - (offset + size))) >= 0 ? size : (long) (window_size - offset); memcpy_toio(dimm_mmio + offset / 4, psource, dist); writel(0x01, mmio + PDC_GENERAL_CTLR); readl(mmio + PDC_GENERAL_CTLR); psource += dist; size -= dist; for (; (long) size >= (long) window_size ;) { writel(((idx) << page_mask), mmio + PDC_DIMM_WINDOW_CTLR); readl(mmio + PDC_DIMM_WINDOW_CTLR); memcpy_toio(dimm_mmio, psource, window_size / 4); writel(0x01, mmio + PDC_GENERAL_CTLR); readl(mmio + PDC_GENERAL_CTLR); psource += window_size; size -= window_size; idx++; } if (size) { writel(((idx) << page_mask), mmio + PDC_DIMM_WINDOW_CTLR); readl(mmio + PDC_DIMM_WINDOW_CTLR); memcpy_toio(dimm_mmio, psource, size / 4); writel(0x01, mmio + PDC_GENERAL_CTLR); readl(mmio + PDC_GENERAL_CTLR); } } static unsigned int pdc20621_i2c_read(struct ata_host *host, u32 device, u32 subaddr, u32 *pdata) { void __iomem *mmio = host->iomap[PDC_MMIO_BAR]; u32 i2creg = 0; u32 status; u32 count = 0; /* hard-code chip #0 */ mmio += PDC_CHIP0_OFS; i2creg |= device << 24; i2creg |= subaddr << 16; /* Set the device and subaddress */ writel(i2creg, mmio + PDC_I2C_ADDR_DATA); readl(mmio + PDC_I2C_ADDR_DATA); /* Write Control to perform read operation, mask int */ writel(PDC_I2C_READ | PDC_I2C_START | PDC_I2C_MASK_INT, mmio + PDC_I2C_CONTROL); for (count = 0; count <= 1000; count ++) { status = readl(mmio + PDC_I2C_CONTROL); if (status & PDC_I2C_COMPLETE) { status = readl(mmio + PDC_I2C_ADDR_DATA); break; } else if (count == 1000) return 0; } *pdata = (status >> 8) & 0x000000ff; return 1; } static int pdc20621_detect_dimm(struct ata_host *host) { u32 data = 0; if (pdc20621_i2c_read(host, PDC_DIMM0_SPD_DEV_ADDRESS, PDC_DIMM_SPD_SYSTEM_FREQ, &data)) { if (data == 100) return 100; } else return 0; if (pdc20621_i2c_read(host, PDC_DIMM0_SPD_DEV_ADDRESS, 9, &data)) { if (data <= 0x75) return 133; } else return 0; return 0; } static int pdc20621_prog_dimm0(struct ata_host *host) { u32 spd0[50]; u32 data = 0; int size, i; u8 bdimmsize; void __iomem *mmio = host->iomap[PDC_MMIO_BAR]; static const struct { unsigned int reg; unsigned int ofs; } pdc_i2c_read_data [] = { { PDC_DIMM_SPD_TYPE, 11 }, { PDC_DIMM_SPD_FRESH_RATE, 12 }, { PDC_DIMM_SPD_COLUMN_NUM, 4 }, { PDC_DIMM_SPD_ATTRIBUTE, 21 }, { PDC_DIMM_SPD_ROW_NUM, 3 }, { PDC_DIMM_SPD_BANK_NUM, 17 }, { PDC_DIMM_SPD_MODULE_ROW, 5 }, { PDC_DIMM_SPD_ROW_PRE_CHARGE, 27 }, { PDC_DIMM_SPD_ROW_ACTIVE_DELAY, 28 }, { PDC_DIMM_SPD_RAS_CAS_DELAY, 29 }, { PDC_DIMM_SPD_ACTIVE_PRECHARGE, 30 }, { PDC_DIMM_SPD_CAS_LATENCY, 18 }, }; /* hard-code chip #0 */ mmio += PDC_CHIP0_OFS; for (i = 0; i < ARRAY_SIZE(pdc_i2c_read_data); i++) pdc20621_i2c_read(host, PDC_DIMM0_SPD_DEV_ADDRESS, pdc_i2c_read_data[i].reg, &spd0[pdc_i2c_read_data[i].ofs]); data |= (spd0[4] - 8) | ((spd0[21] != 0) << 3) | ((spd0[3]-11) << 4); data |= ((spd0[17] / 4) << 6) | ((spd0[5] / 2) << 7) | ((((spd0[27] + 9) / 10) - 1) << 8) ; data |= (((((spd0[29] > spd0[28]) ? spd0[29] : spd0[28]) + 9) / 10) - 1) << 10; data |= ((spd0[30] - spd0[29] + 9) / 10 - 2) << 12; if (spd0[18] & 0x08) data |= ((0x03) << 14); else if (spd0[18] & 0x04) data |= ((0x02) << 14); else if (spd0[18] & 0x01) data |= ((0x01) << 14); else data |= (0 << 14); /* Calculate the size of bDIMMSize (power of 2) and merge the DIMM size by program start/end address. */ bdimmsize = spd0[4] + (spd0[5] / 2) + spd0[3] + (spd0[17] / 2) + 3; size = (1 << bdimmsize) >> 20; /* size = xxx(MB) */ data |= (((size / 16) - 1) << 16); data |= (0 << 23); data |= 8; writel(data, mmio + PDC_DIMM0_CONTROL); readl(mmio + PDC_DIMM0_CONTROL); return size; } static unsigned int pdc20621_prog_dimm_global(struct ata_host *host) { u32 data, spd0; int error, i; void __iomem *mmio = host->iomap[PDC_MMIO_BAR]; /* hard-code chip #0 */ mmio += PDC_CHIP0_OFS; /* Set To Default : DIMM Module Global Control Register (0x022259F1) DIMM Arbitration Disable (bit 20) DIMM Data/Control Output Driving Selection (bit12 - bit15) Refresh Enable (bit 17) */ data = 0x022259F1; writel(data, mmio + PDC_SDRAM_CONTROL); readl(mmio + PDC_SDRAM_CONTROL); /* Turn on for ECC */ if (!pdc20621_i2c_read(host, PDC_DIMM0_SPD_DEV_ADDRESS, PDC_DIMM_SPD_TYPE, &spd0)) { dev_err(host->dev, "Failed in i2c read: device=%#x, subaddr=%#x\n", PDC_DIMM0_SPD_DEV_ADDRESS, PDC_DIMM_SPD_TYPE); return 1; } if (spd0 == 0x02) { data |= (0x01 << 16); writel(data, mmio + PDC_SDRAM_CONTROL); readl(mmio + PDC_SDRAM_CONTROL); dev_err(host->dev, "Local DIMM ECC Enabled\n"); } /* DIMM Initialization Select/Enable (bit 18/19) */ data &= (~(1<<18)); data |= (1<<19); writel(data, mmio + PDC_SDRAM_CONTROL); error = 1; for (i = 1; i <= 10; i++) { /* polling ~5 secs */ data = readl(mmio + PDC_SDRAM_CONTROL); if (!(data & (1<<19))) { error = 0; break; } msleep(i*100); } return error; } static unsigned int pdc20621_dimm_init(struct ata_host *host) { int speed, size, length; u32 addr, spd0, pci_status; u32 time_period = 0; u32 tcount = 0; u32 ticks = 0; u32 clock = 0; u32 fparam = 0; void __iomem *mmio = host->iomap[PDC_MMIO_BAR]; /* hard-code chip #0 */ mmio += PDC_CHIP0_OFS; /* Initialize PLL based upon PCI Bus Frequency */ /* Initialize Time Period Register */ writel(0xffffffff, mmio + PDC_TIME_PERIOD); time_period = readl(mmio + PDC_TIME_PERIOD); dev_dbg(host->dev, "Time Period Register (0x40): 0x%x\n", time_period); /* Enable timer */ writel(PDC_TIMER_DEFAULT, mmio + PDC_TIME_CONTROL); readl(mmio + PDC_TIME_CONTROL); /* Wait 3 seconds */ msleep(3000); /* When timer is enabled, counter is decreased every internal clock cycle. */ tcount = readl(mmio + PDC_TIME_COUNTER); dev_dbg(host->dev, "Time Counter Register (0x44): 0x%x\n", tcount); /* If SX4 is on PCI-X bus, after 3 seconds, the timer counter register should be >= (0xffffffff - 3x10^8). */ if (tcount >= PCI_X_TCOUNT) { ticks = (time_period - tcount); dev_dbg(host->dev, "Num counters 0x%x (%d)\n", ticks, ticks); clock = (ticks / 300000); dev_dbg(host->dev, "10 * Internal clk = 0x%x (%d)\n", clock, clock); clock = (clock * 33); dev_dbg(host->dev, "10 * Internal clk * 33 = 0x%x (%d)\n", clock, clock); /* PLL F Param (bit 22:16) */ fparam = (1400000 / clock) - 2; dev_dbg(host->dev, "PLL F Param: 0x%x (%d)\n", fparam, fparam); /* OD param = 0x2 (bit 31:30), R param = 0x5 (bit 29:25) */ pci_status = (0x8a001824 | (fparam << 16)); } else pci_status = PCI_PLL_INIT; /* Initialize PLL. */ dev_dbg(host->dev, "pci_status: 0x%x\n", pci_status); writel(pci_status, mmio + PDC_CTL_STATUS); readl(mmio + PDC_CTL_STATUS); /* Read SPD of DIMM by I2C interface, and program the DIMM Module Controller. */ if (!(speed = pdc20621_detect_dimm(host))) { dev_err(host->dev, "Detect Local DIMM Fail\n"); return 1; /* DIMM error */ } dev_dbg(host->dev, "Local DIMM Speed = %d\n", speed); /* Programming DIMM0 Module Control Register (index_CID0:80h) */ size = pdc20621_prog_dimm0(host); dev_dbg(host->dev, "Local DIMM Size = %dMB\n", size); /* Programming DIMM Module Global Control Register (index_CID0:88h) */ if (pdc20621_prog_dimm_global(host)) { dev_err(host->dev, "Programming DIMM Module Global Control Register Fail\n"); return 1; } if (dimm_test) { u8 test_parttern1[40] = {0x55,0xAA,'P','r','o','m','i','s','e',' ', 'N','o','t',' ','Y','e','t',' ', 'D','e','f','i','n','e','d',' ', '1','.','1','0', '9','8','0','3','1','6','1','2',0,0}; u8 test_parttern2[40] = {0}; pdc20621_put_to_dimm(host, test_parttern2, 0x10040, 40); pdc20621_put_to_dimm(host, test_parttern2, 0x40, 40); pdc20621_put_to_dimm(host, test_parttern1, 0x10040, 40); pdc20621_get_from_dimm(host, test_parttern2, 0x40, 40); dev_info(host->dev, "DIMM test pattern 1: %x, %x, %s\n", test_parttern2[0], test_parttern2[1], &(test_parttern2[2])); pdc20621_get_from_dimm(host, test_parttern2, 0x10040, 40); dev_info(host->dev, "DIMM test pattern 2: %x, %x, %s\n", test_parttern2[0], test_parttern2[1], &(test_parttern2[2])); pdc20621_put_to_dimm(host, test_parttern1, 0x40, 40); pdc20621_get_from_dimm(host, test_parttern2, 0x40, 40); dev_info(host->dev, "DIMM test pattern 3: %x, %x, %s\n", test_parttern2[0], test_parttern2[1], &(test_parttern2[2])); } /* ECC initiliazation. */ if (!pdc20621_i2c_read(host, PDC_DIMM0_SPD_DEV_ADDRESS, PDC_DIMM_SPD_TYPE, &spd0)) { dev_err(host->dev, "Failed in i2c read: device=%#x, subaddr=%#x\n", PDC_DIMM0_SPD_DEV_ADDRESS, PDC_DIMM_SPD_TYPE); return 1; } if (spd0 == 0x02) { void *buf; dev_dbg(host->dev, "Start ECC initialization\n"); addr = 0; length = size * 1024 * 1024; buf = kzalloc(ECC_ERASE_BUF_SZ, GFP_KERNEL); if (!buf) return 1; while (addr < length) { pdc20621_put_to_dimm(host, buf, addr, ECC_ERASE_BUF_SZ); addr += ECC_ERASE_BUF_SZ; } kfree(buf); dev_dbg(host->dev, "Finish ECC initialization\n"); } return 0; } static void pdc_20621_init(struct ata_host *host) { u32 tmp; void __iomem *mmio = host->iomap[PDC_MMIO_BAR]; /* hard-code chip #0 */ mmio += PDC_CHIP0_OFS; /* * Select page 0x40 for our 32k DIMM window */ tmp = readl(mmio + PDC_20621_DIMM_WINDOW) & 0xffff0000; tmp |= PDC_PAGE_WINDOW; /* page 40h; arbitrarily selected */ writel(tmp, mmio + PDC_20621_DIMM_WINDOW); /* * Reset Host DMA */ tmp = readl(mmio + PDC_HDMA_CTLSTAT); tmp |= PDC_RESET; writel(tmp, mmio + PDC_HDMA_CTLSTAT); readl(mmio + PDC_HDMA_CTLSTAT); /* flush */ udelay(10); tmp = readl(mmio + PDC_HDMA_CTLSTAT); tmp &= ~PDC_RESET; writel(tmp, mmio + PDC_HDMA_CTLSTAT); readl(mmio + PDC_HDMA_CTLSTAT); /* flush */ } static int pdc_sata_init_one(struct pci_dev *pdev, const struct pci_device_id *ent) { const struct ata_port_info *ppi[] = { &pdc_port_info[ent->driver_data], NULL }; struct ata_host *host; struct pdc_host_priv *hpriv; int i, rc; ata_print_version_once(&pdev->dev, DRV_VERSION); /* allocate host */ host = ata_host_alloc_pinfo(&pdev->dev, ppi, 4); hpriv = devm_kzalloc(&pdev->dev, sizeof(*hpriv), GFP_KERNEL); if (!host || !hpriv) return -ENOMEM; host->private_data = hpriv; /* acquire resources and fill host */ rc = pcim_enable_device(pdev); if (rc) return rc; rc = pcim_iomap_regions(pdev, (1 << PDC_MMIO_BAR) | (1 << PDC_DIMM_BAR), DRV_NAME); if (rc == -EBUSY) pcim_pin_device(pdev); if (rc) return rc; host->iomap = pcim_iomap_table(pdev); for (i = 0; i < 4; i++) { struct ata_port *ap = host->ports[i]; void __iomem *base = host->iomap[PDC_MMIO_BAR] + PDC_CHIP0_OFS; unsigned int offset = 0x200 + i * 0x80; pdc_sata_setup_port(&ap->ioaddr, base + offset); ata_port_pbar_desc(ap, PDC_MMIO_BAR, -1, "mmio"); ata_port_pbar_desc(ap, PDC_DIMM_BAR, -1, "dimm"); ata_port_pbar_desc(ap, PDC_MMIO_BAR, offset, "port"); } /* configure and activate */ rc = dma_set_mask_and_coherent(&pdev->dev, ATA_DMA_MASK); if (rc) return rc; if (pdc20621_dimm_init(host)) return -ENOMEM; pdc_20621_init(host); pci_set_master(pdev); return ata_host_activate(host, pdev->irq, pdc20621_interrupt, IRQF_SHARED, &pdc_sata_sht); } module_pci_driver(pdc_sata_pci_driver); MODULE_AUTHOR("Jeff Garzik"); MODULE_DESCRIPTION("Promise SATA low-level driver"); MODULE_LICENSE("GPL"); MODULE_DEVICE_TABLE(pci, pdc_sata_pci_tbl); MODULE_VERSION(DRV_VERSION);
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