diff options
Diffstat (limited to 'drivers/ata/sata_sx4.c')
| -rw-r--r-- | drivers/ata/sata_sx4.c | 1513 |
1 files changed, 1513 insertions, 0 deletions
diff --git a/drivers/ata/sata_sx4.c b/drivers/ata/sata_sx4.c new file mode 100644 index 000000000..0d7424579 --- /dev/null +++ b/drivers/ata/sata_sx4.c @@ -0,0 +1,1513 @@ +/* + * 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. + * + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2, or (at your option) + * any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; see the file COPYING. If not, write to + * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. + * + * + * 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" + + +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); +#ifdef ATA_VERBOSE_DEBUG +static void pdc20621_get_from_dimm(struct ata_host *host, + void *psource, u32 offset, u32 size); +#endif +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); + VPRINTK("ATA sg addr 0x%x, %d\n", addr, addr); + buf32[dw] = cpu_to_le32(addr); + buf32[dw + 1] = cpu_to_le32(total_len | ATA_PRD_EOT); + + VPRINTK("ATA PSG @ %x == (0x%x, 0x%x)\n", + PDC_20621_DIMM_BASE + + (PDC_DIMM_WINDOW_STEP * portno) + + PDC_DIMM_APKT_PRD, + buf32[dw], buf32[dw + 1]); +} + +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); + + VPRINTK("HOST PSG @ %x == (0x%x, 0x%x)\n", + PDC_20621_DIMM_BASE + + (PDC_DIMM_WINDOW_STEP * portno) + + PDC_DIMM_HPKT_PRD, + buf32[dw], buf32[dw + 1]); +} + +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; + VPRINTK("ENTER, dimm_sg == 0x%x, %d\n", dimm_sg, dimm_sg); + + 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; + VPRINTK("ENTER, dimm_sg == 0x%x, %d\n", dimm_sg, dimm_sg); + VPRINTK("host_sg == 0x%x, %d\n", host_sg, host_sg); + + 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; + + VPRINTK("HOST PKT @ %x == (0x%x 0x%x 0x%x 0x%x)\n", + PDC_20621_DIMM_BASE + (PDC_DIMM_WINDOW_STEP * portno) + + PDC_DIMM_HOST_PKT, + buf32[dw + 0], + buf32[dw + 1], + buf32[dw + 2], + buf32[dw + 3]); +} + +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)); + + VPRINTK("ata%u: ENTER\n", ap->print_id); + + /* 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 */ + + VPRINTK("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; + + VPRINTK("ata%u: ENTER\n", ap->print_id); + + /* 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 */ + + VPRINTK("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++; +} + +#ifdef ATA_VERBOSE_DEBUG +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; + + printk(KERN_ERR "HDMA[0] == 0x%08X\n", readl(dimm_mmio)); + printk(KERN_ERR "HDMA[1] == 0x%08X\n", readl(dimm_mmio + 4)); + printk(KERN_ERR "HDMA[2] == 0x%08X\n", readl(dimm_mmio + 8)); + printk(KERN_ERR "HDMA[3] == 0x%08X\n", readl(dimm_mmio + 12)); +} +#else +static inline void pdc20621_dump_hdma(struct ata_queued_cmd *qc) { } +#endif /* ATA_VERBOSE_DEBUG */ + +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; + + VPRINTK("ata%u: ENTER\n", ap->print_id); + + 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); + VPRINTK("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); + VPRINTK("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; + + VPRINTK("ENTER\n"); + + if ((qc->tf.protocol == ATA_PROT_DMA) && /* read */ + (!(qc->tf.flags & ATA_TFLAG_WRITE))) { + + /* step two - DMA from DIMM to host */ + if (doing_hdma) { + VPRINTK("ata%u: read hdma, 0x%x 0x%x\n", ap->print_id, + 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); + VPRINTK("ata%u: read ata, 0x%x 0x%x\n", ap->print_id, + 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); + VPRINTK("ata%u: write hdma, 0x%x 0x%x\n", ap->print_id, + 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 { + VPRINTK("ata%u: write ata, 0x%x 0x%x\n", ap->print_id, + 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); + DPRINTK("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; + + VPRINTK("ENTER\n"); + + if (!host || !host->iomap[PDC_MMIO_BAR]) { + VPRINTK("QUICK EXIT\n"); + 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); + VPRINTK("mask == 0x%x\n", mask); + + if (mask == 0xffffffff) { + VPRINTK("QUICK EXIT 2\n"); + return IRQ_NONE; + } + mask &= 0xffff; /* only 16 tags possible */ + if (!mask) { + VPRINTK("QUICK EXIT 3\n"); + 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); + VPRINTK("seq %u, port_no %u, ap %p, tmp %x\n", i, port_no, ap, 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); + + VPRINTK("mask == 0x%x\n", mask); + + VPRINTK("EXIT\n"); + + 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; +} + + +#ifdef ATA_VERBOSE_DEBUG +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); + } +} +#endif + + +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)) { + pr_err("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); + printk(KERN_ERR "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); + VPRINTK("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); + VPRINTK("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); + VPRINTK("Num counters 0x%x (%d)\n", ticks, ticks); + + clock = (ticks / 300000); + VPRINTK("10 * Internal clk = 0x%x (%d)\n", clock, clock); + + clock = (clock * 33); + VPRINTK("10 * Internal clk * 33 = 0x%x (%d)\n", clock, clock); + + /* PLL F Param (bit 22:16) */ + fparam = (1400000 / clock) - 2; + VPRINTK("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. */ + VPRINTK("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))) { + printk(KERN_ERR "Detect Local DIMM Fail\n"); + return 1; /* DIMM error */ + } + VPRINTK("Local DIMM Speed = %d\n", speed); + + /* Programming DIMM0 Module Control Register (index_CID0:80h) */ + size = pdc20621_prog_dimm0(host); + VPRINTK("Local DIMM Size = %dMB\n", size); + + /* Programming DIMM Module Global Control Register (index_CID0:88h) */ + if (pdc20621_prog_dimm_global(host)) { + printk(KERN_ERR "Programming DIMM Module Global Control Register Fail\n"); + return 1; + } + +#ifdef ATA_VERBOSE_DEBUG + { + 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); + printk(KERN_ERR "%x, %x, %s\n", test_parttern2[0], + test_parttern2[1], &(test_parttern2[2])); + pdc20621_get_from_dimm(host, test_parttern2, 0x10040, + 40); + printk(KERN_ERR "%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); + printk(KERN_ERR "%x, %x, %s\n", test_parttern2[0], + test_parttern2[1], &(test_parttern2[2])); + } +#endif + + /* ECC initiliazation. */ + + if (!pdc20621_i2c_read(host, PDC_DIMM0_SPD_DEV_ADDRESS, + PDC_DIMM_SPD_TYPE, &spd0)) { + pr_err("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; + VPRINTK("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); + VPRINTK("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(&pdev->dev, ATA_DMA_MASK); + if (rc) + return rc; + rc = dma_set_coherent_mask(&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); |