/* * Promise PATA TX2/TX4/TX2000/133 IDE driver for pdc20268 to pdc20277. * * 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 of the License, or (at your option) any later version. * * Ported to libata by: * Albert Lee <albertcc@tw.ibm.com> IBM Corporation * * Copyright (C) 1998-2002 Andre Hedrick <andre@linux-ide.org> * Portions Copyright (C) 1999 Promise Technology, Inc. * * Author: Frank Tiernan (frankt@promise.com) * Released under terms of General Public License * * * libata documentation is available via 'make {ps|pdf}docs', * as Documentation/DocBook/libata.* * * Hardware information only available under NDA. * */ #include <linux/kernel.h> #include <linux/module.h> #include <linux/pci.h> #include <linux/init.h> #include <linux/blkdev.h> #include <linux/delay.h> #include <linux/device.h> #include <scsi/scsi.h> #include <scsi/scsi_host.h> #include <scsi/scsi_cmnd.h> #include <linux/libata.h> #define DRV_NAME "pata_pdc2027x" #define DRV_VERSION "1.0" #undef PDC_DEBUG #ifdef PDC_DEBUG #define PDPRINTK(fmt, args...) printk(KERN_ERR "%s: " fmt, __FUNCTION__, ## args) #else #define PDPRINTK(fmt, args...) #endif enum { PDC_MMIO_BAR = 5, PDC_UDMA_100 = 0, PDC_UDMA_133 = 1, PDC_100_MHZ = 100000000, PDC_133_MHZ = 133333333, PDC_SYS_CTL = 0x1100, PDC_ATA_CTL = 0x1104, PDC_GLOBAL_CTL = 0x1108, PDC_CTCR0 = 0x110C, PDC_CTCR1 = 0x1110, PDC_BYTE_COUNT = 0x1120, PDC_PLL_CTL = 0x1202, }; static int pdc2027x_init_one(struct pci_dev *pdev, const struct pci_device_id *ent); static void pdc2027x_error_handler(struct ata_port *ap); static void pdc2027x_set_piomode(struct ata_port *ap, struct ata_device *adev); static void pdc2027x_set_dmamode(struct ata_port *ap, struct ata_device *adev); static int pdc2027x_check_atapi_dma(struct ata_queued_cmd *qc); static unsigned long pdc2027x_mode_filter(struct ata_device *adev, unsigned long mask); static int pdc2027x_cable_detect(struct ata_port *ap); static int pdc2027x_set_mode(struct ata_link *link, struct ata_device **r_failed); /* * ATA Timing Tables based on 133MHz controller clock. * These tables are only used when the controller is in 133MHz clock. * If the controller is in 100MHz clock, the ASIC hardware will * set the timing registers automatically when "set feature" command * is issued to the device. However, if the controller clock is 133MHz, * the following tables must be used. */ static struct pdc2027x_pio_timing { u8 value0, value1, value2; } pdc2027x_pio_timing_tbl [] = { { 0xfb, 0x2b, 0xac }, /* PIO mode 0 */ { 0x46, 0x29, 0xa4 }, /* PIO mode 1 */ { 0x23, 0x26, 0x64 }, /* PIO mode 2 */ { 0x27, 0x0d, 0x35 }, /* PIO mode 3, IORDY on, Prefetch off */ { 0x23, 0x09, 0x25 }, /* PIO mode 4, IORDY on, Prefetch off */ }; static struct pdc2027x_mdma_timing { u8 value0, value1; } pdc2027x_mdma_timing_tbl [] = { { 0xdf, 0x5f }, /* MDMA mode 0 */ { 0x6b, 0x27 }, /* MDMA mode 1 */ { 0x69, 0x25 }, /* MDMA mode 2 */ }; static struct pdc2027x_udma_timing { u8 value0, value1, value2; } pdc2027x_udma_timing_tbl [] = { { 0x4a, 0x0f, 0xd5 }, /* UDMA mode 0 */ { 0x3a, 0x0a, 0xd0 }, /* UDMA mode 1 */ { 0x2a, 0x07, 0xcd }, /* UDMA mode 2 */ { 0x1a, 0x05, 0xcd }, /* UDMA mode 3 */ { 0x1a, 0x03, 0xcd }, /* UDMA mode 4 */ { 0x1a, 0x02, 0xcb }, /* UDMA mode 5 */ { 0x1a, 0x01, 0xcb }, /* UDMA mode 6 */ }; static const struct pci_device_id pdc2027x_pci_tbl[] = { { PCI_VDEVICE(PROMISE, PCI_DEVICE_ID_PROMISE_20268), PDC_UDMA_100 }, { PCI_VDEVICE(PROMISE, PCI_DEVICE_ID_PROMISE_20269), PDC_UDMA_133 }, { PCI_VDEVICE(PROMISE, PCI_DEVICE_ID_PROMISE_20270), PDC_UDMA_100 }, { PCI_VDEVICE(PROMISE, PCI_DEVICE_ID_PROMISE_20271), PDC_UDMA_133 }, { PCI_VDEVICE(PROMISE, PCI_DEVICE_ID_PROMISE_20275), PDC_UDMA_133 }, { PCI_VDEVICE(PROMISE, PCI_DEVICE_ID_PROMISE_20276), PDC_UDMA_133 }, { PCI_VDEVICE(PROMISE, PCI_DEVICE_ID_PROMISE_20277), PDC_UDMA_133 }, { } /* terminate list */ }; static struct pci_driver pdc2027x_pci_driver = { .name = DRV_NAME, .id_table = pdc2027x_pci_tbl, .probe = pdc2027x_init_one, .remove = ata_pci_remove_one, }; static struct scsi_host_template pdc2027x_sht = { .module = THIS_MODULE, .name = DRV_NAME, .ioctl = ata_scsi_ioctl, .queuecommand = ata_scsi_queuecmd, .can_queue = ATA_DEF_QUEUE, .this_id = ATA_SHT_THIS_ID, .sg_tablesize = LIBATA_MAX_PRD, .cmd_per_lun = ATA_SHT_CMD_PER_LUN, .emulated = ATA_SHT_EMULATED, .use_clustering = ATA_SHT_USE_CLUSTERING, .proc_name = DRV_NAME, .dma_boundary = ATA_DMA_BOUNDARY, .slave_configure = ata_scsi_slave_config, .slave_destroy = ata_scsi_slave_destroy, .bios_param = ata_std_bios_param, }; static struct ata_port_operations pdc2027x_pata100_ops = { .mode_filter = ata_pci_default_filter, .tf_load = ata_tf_load, .tf_read = ata_tf_read, .check_status = ata_check_status, .exec_command = ata_exec_command, .dev_select = ata_std_dev_select, .check_atapi_dma = pdc2027x_check_atapi_dma, .bmdma_setup = ata_bmdma_setup, .bmdma_start = ata_bmdma_start, .bmdma_stop = ata_bmdma_stop, .bmdma_status = ata_bmdma_status, .qc_prep = ata_qc_prep, .qc_issue = ata_qc_issue_prot, .data_xfer = ata_data_xfer, .freeze = ata_bmdma_freeze, .thaw = ata_bmdma_thaw, .error_handler = pdc2027x_error_handler, .post_internal_cmd = ata_bmdma_post_internal_cmd, .cable_detect = pdc2027x_cable_detect, .irq_clear = ata_bmdma_irq_clear, .irq_on = ata_irq_on, .port_start = ata_sff_port_start, }; static struct ata_port_operations pdc2027x_pata133_ops = { .set_piomode = pdc2027x_set_piomode, .set_dmamode = pdc2027x_set_dmamode, .set_mode = pdc2027x_set_mode, .mode_filter = pdc2027x_mode_filter, .tf_load = ata_tf_load, .tf_read = ata_tf_read, .check_status = ata_check_status, .exec_command = ata_exec_command, .dev_select = ata_std_dev_select, .check_atapi_dma = pdc2027x_check_atapi_dma, .bmdma_setup = ata_bmdma_setup, .bmdma_start = ata_bmdma_start, .bmdma_stop = ata_bmdma_stop, .bmdma_status = ata_bmdma_status, .qc_prep = ata_qc_prep, .qc_issue = ata_qc_issue_prot, .data_xfer = ata_data_xfer, .freeze = ata_bmdma_freeze, .thaw = ata_bmdma_thaw, .error_handler = pdc2027x_error_handler, .post_internal_cmd = ata_bmdma_post_internal_cmd, .cable_detect = pdc2027x_cable_detect, .irq_clear = ata_bmdma_irq_clear, .irq_on = ata_irq_on, .port_start = ata_sff_port_start, }; static struct ata_port_info pdc2027x_port_info[] = { /* PDC_UDMA_100 */ { .flags = ATA_FLAG_NO_LEGACY | ATA_FLAG_SLAVE_POSS | ATA_FLAG_MMIO, .pio_mask = 0x1f, /* pio0-4 */ .mwdma_mask = 0x07, /* mwdma0-2 */ .udma_mask = ATA_UDMA5, /* udma0-5 */ .port_ops = &pdc2027x_pata100_ops, }, /* PDC_UDMA_133 */ { .flags = ATA_FLAG_NO_LEGACY | ATA_FLAG_SLAVE_POSS | ATA_FLAG_MMIO, .pio_mask = 0x1f, /* pio0-4 */ .mwdma_mask = 0x07, /* mwdma0-2 */ .udma_mask = ATA_UDMA6, /* udma0-6 */ .port_ops = &pdc2027x_pata133_ops, }, }; MODULE_AUTHOR("Andre Hedrick, Frank Tiernan, Albert Lee"); MODULE_DESCRIPTION("libata driver module for Promise PDC20268 to PDC20277"); MODULE_LICENSE("GPL"); MODULE_VERSION(DRV_VERSION); MODULE_DEVICE_TABLE(pci, pdc2027x_pci_tbl); /** * port_mmio - Get the MMIO address of PDC2027x extended registers * @ap: Port * @offset: offset from mmio base */ static inline void __iomem *port_mmio(struct ata_port *ap, unsigned int offset) { return ap->host->iomap[PDC_MMIO_BAR] + ap->port_no * 0x100 + offset; } /** * dev_mmio - Get the MMIO address of PDC2027x extended registers * @ap: Port * @adev: device * @offset: offset from mmio base */ static inline void __iomem *dev_mmio(struct ata_port *ap, struct ata_device *adev, unsigned int offset) { u8 adj = (adev->devno) ? 0x08 : 0x00; return port_mmio(ap, offset) + adj; } /** * pdc2027x_pata_cable_detect - Probe host controller cable detect info * @ap: Port for which cable detect info is desired * * Read 80c cable indicator from Promise extended register. * This register is latched when the system is reset. * * LOCKING: * None (inherited from caller). */ static int pdc2027x_cable_detect(struct ata_port *ap) { u32 cgcr; /* check cable detect results */ cgcr = ioread32(port_mmio(ap, PDC_GLOBAL_CTL)); if (cgcr & (1 << 26)) goto cbl40; PDPRINTK("No cable or 80-conductor cable on port %d\n", ap->port_no); return ATA_CBL_PATA80; cbl40: printk(KERN_INFO DRV_NAME ": 40-conductor cable detected on port %d\n", ap->port_no); return ATA_CBL_PATA40; } /** * pdc2027x_port_enabled - Check PDC ATA control register to see whether the port is enabled. * @ap: Port to check */ static inline int pdc2027x_port_enabled(struct ata_port *ap) { return ioread8(port_mmio(ap, PDC_ATA_CTL)) & 0x02; } /** * pdc2027x_prereset - prereset for PATA host controller * @link: Target link * @deadline: deadline jiffies for the operation * * Probeinit including cable detection. * * LOCKING: * None (inherited from caller). */ static int pdc2027x_prereset(struct ata_link *link, unsigned long deadline) { /* Check whether port enabled */ if (!pdc2027x_port_enabled(link->ap)) return -ENOENT; return ata_std_prereset(link, deadline); } /** * pdc2027x_error_handler - Perform reset on PATA port and classify * @ap: Port to reset * * Reset PATA phy and classify attached devices. * * LOCKING: * None (inherited from caller). */ static void pdc2027x_error_handler(struct ata_port *ap) { ata_bmdma_drive_eh(ap, pdc2027x_prereset, ata_std_softreset, NULL, ata_std_postreset); } /** * pdc2720x_mode_filter - mode selection filter * @adev: ATA device * @mask: list of modes proposed * * Block UDMA on devices that cause trouble with this controller. */ static unsigned long pdc2027x_mode_filter(struct ata_device *adev, unsigned long mask) { unsigned char model_num[ATA_ID_PROD_LEN + 1]; struct ata_device *pair = ata_dev_pair(adev); if (adev->class != ATA_DEV_ATA || adev->devno == 0 || pair == NULL) return ata_pci_default_filter(adev, mask); /* Check for slave of a Maxtor at UDMA6 */ ata_id_c_string(pair->id, model_num, ATA_ID_PROD, ATA_ID_PROD_LEN + 1); /* If the master is a maxtor in UDMA6 then the slave should not use UDMA 6 */ if (strstr(model_num, "Maxtor") == NULL && pair->dma_mode == XFER_UDMA_6) mask &= ~ (1 << (6 + ATA_SHIFT_UDMA)); return ata_pci_default_filter(adev, mask); } /** * pdc2027x_set_piomode - Initialize host controller PATA PIO timings * @ap: Port to configure * @adev: um * @pio: PIO mode, 0 - 4 * * Set PIO mode for device. * * LOCKING: * None (inherited from caller). */ static void pdc2027x_set_piomode(struct ata_port *ap, struct ata_device *adev) { unsigned int pio = adev->pio_mode - XFER_PIO_0; u32 ctcr0, ctcr1; PDPRINTK("adev->pio_mode[%X]\n", adev->pio_mode); /* Sanity check */ if (pio > 4) { printk(KERN_ERR DRV_NAME ": Unknown pio mode [%d] ignored\n", pio); return; } /* Set the PIO timing registers using value table for 133MHz */ PDPRINTK("Set pio regs... \n"); ctcr0 = ioread32(dev_mmio(ap, adev, PDC_CTCR0)); ctcr0 &= 0xffff0000; ctcr0 |= pdc2027x_pio_timing_tbl[pio].value0 | (pdc2027x_pio_timing_tbl[pio].value1 << 8); iowrite32(ctcr0, dev_mmio(ap, adev, PDC_CTCR0)); ctcr1 = ioread32(dev_mmio(ap, adev, PDC_CTCR1)); ctcr1 &= 0x00ffffff; ctcr1 |= (pdc2027x_pio_timing_tbl[pio].value2 << 24); iowrite32(ctcr1, dev_mmio(ap, adev, PDC_CTCR1)); PDPRINTK("Set pio regs done\n"); PDPRINTK("Set to pio mode[%u] \n", pio); } /** * pdc2027x_set_dmamode - Initialize host controller PATA UDMA timings * @ap: Port to configure * @adev: um * @udma: udma mode, XFER_UDMA_0 to XFER_UDMA_6 * * Set UDMA mode for device. * * LOCKING: * None (inherited from caller). */ static void pdc2027x_set_dmamode(struct ata_port *ap, struct ata_device *adev) { unsigned int dma_mode = adev->dma_mode; u32 ctcr0, ctcr1; if ((dma_mode >= XFER_UDMA_0) && (dma_mode <= XFER_UDMA_6)) { /* Set the UDMA timing registers with value table for 133MHz */ unsigned int udma_mode = dma_mode & 0x07; if (dma_mode == XFER_UDMA_2) { /* * Turn off tHOLD. * If tHOLD is '1', the hardware will add half clock for data hold time. * This code segment seems to be no effect. tHOLD will be overwritten below. */ ctcr1 = ioread32(dev_mmio(ap, adev, PDC_CTCR1)); iowrite32(ctcr1 & ~(1 << 7), dev_mmio(ap, adev, PDC_CTCR1)); } PDPRINTK("Set udma regs... \n"); ctcr1 = ioread32(dev_mmio(ap, adev, PDC_CTCR1)); ctcr1 &= 0xff000000; ctcr1 |= pdc2027x_udma_timing_tbl[udma_mode].value0 | (pdc2027x_udma_timing_tbl[udma_mode].value1 << 8) | (pdc2027x_udma_timing_tbl[udma_mode].value2 << 16); iowrite32(ctcr1, dev_mmio(ap, adev, PDC_CTCR1)); PDPRINTK("Set udma regs done\n"); PDPRINTK("Set to udma mode[%u] \n", udma_mode); } else if ((dma_mode >= XFER_MW_DMA_0) && (dma_mode <= XFER_MW_DMA_2)) { /* Set the MDMA timing registers with value table for 133MHz */ unsigned int mdma_mode = dma_mode & 0x07; PDPRINTK("Set mdma regs... \n"); ctcr0 = ioread32(dev_mmio(ap, adev, PDC_CTCR0)); ctcr0 &= 0x0000ffff; ctcr0 |= (pdc2027x_mdma_timing_tbl[mdma_mode].value0 << 16) | (pdc2027x_mdma_timing_tbl[mdma_mode].value1 << 24); iowrite32(ctcr0, dev_mmio(ap, adev, PDC_CTCR0)); PDPRINTK("Set mdma regs done\n"); PDPRINTK("Set to mdma mode[%u] \n", mdma_mode); } else { printk(KERN_ERR DRV_NAME ": Unknown dma mode [%u] ignored\n", dma_mode); } } /** * pdc2027x_set_mode - Set the timing registers back to correct values. * @link: link to configure * @r_failed: Returned device for failure * * The pdc2027x hardware will look at "SET FEATURES" and change the timing registers * automatically. The values set by the hardware might be incorrect, under 133Mhz PLL. * This function overwrites the possibly incorrect values set by the hardware to be correct. */ static int pdc2027x_set_mode(struct ata_link *link, struct ata_device **r_failed) { struct ata_port *ap = link->ap; struct ata_device *dev; int rc; rc = ata_do_set_mode(link, r_failed); if (rc < 0) return rc; ata_link_for_each_dev(dev, link) { if (ata_dev_enabled(dev)) { pdc2027x_set_piomode(ap, dev); /* * Enable prefetch if the device support PIO only. */ if (dev->xfer_shift == ATA_SHIFT_PIO) { u32 ctcr1 = ioread32(dev_mmio(ap, dev, PDC_CTCR1)); ctcr1 |= (1 << 25); iowrite32(ctcr1, dev_mmio(ap, dev, PDC_CTCR1)); PDPRINTK("Turn on prefetch\n"); } else { pdc2027x_set_dmamode(ap, dev); } } } return 0; } /** * pdc2027x_check_atapi_dma - Check whether ATAPI DMA can be supported for this command * @qc: Metadata associated with taskfile to check * * LOCKING: * None (inherited from caller). * * RETURNS: 0 when ATAPI DMA can be used * 1 otherwise */ static int pdc2027x_check_atapi_dma(struct ata_queued_cmd *qc) { struct scsi_cmnd *cmd = qc->scsicmd; u8 *scsicmd = cmd->cmnd; int rc = 1; /* atapi dma off by default */ /* * This workaround is from Promise's GPL driver. * If ATAPI DMA is used for commands not in the * following white list, say MODE_SENSE and REQUEST_SENSE, * pdc2027x might hit the irq lost problem. */ switch (scsicmd[0]) { case READ_10: case WRITE_10: case READ_12: case WRITE_12: case READ_6: case WRITE_6: case 0xad: /* READ_DVD_STRUCTURE */ case 0xbe: /* READ_CD */ /* ATAPI DMA is ok */ rc = 0; break; default: ; } return rc; } /** * pdc_read_counter - Read the ctr counter * @host: target ATA host */ static long pdc_read_counter(struct ata_host *host) { void __iomem *mmio_base = host->iomap[PDC_MMIO_BAR]; long counter; int retry = 1; u32 bccrl, bccrh, bccrlv, bccrhv; retry: bccrl = ioread32(mmio_base + PDC_BYTE_COUNT) & 0x7fff; bccrh = ioread32(mmio_base + PDC_BYTE_COUNT + 0x100) & 0x7fff; /* Read the counter values again for verification */ bccrlv = ioread32(mmio_base + PDC_BYTE_COUNT) & 0x7fff; bccrhv = ioread32(mmio_base + PDC_BYTE_COUNT + 0x100) & 0x7fff; counter = (bccrh << 15) | bccrl; PDPRINTK("bccrh [%X] bccrl [%X]\n", bccrh, bccrl); PDPRINTK("bccrhv[%X] bccrlv[%X]\n", bccrhv, bccrlv); /* * The 30-bit decreasing counter are read by 2 pieces. * Incorrect value may be read when both bccrh and bccrl are changing. * Ex. When 7900 decrease to 78FF, wrong value 7800 might be read. */ if (retry && !(bccrh == bccrhv && bccrl >= bccrlv)) { retry--; PDPRINTK("rereading counter\n"); goto retry; } return counter; } /** * adjust_pll - Adjust the PLL input clock in Hz. * * @pdc_controller: controller specific information * @host: target ATA host * @pll_clock: The input of PLL in HZ */ static void pdc_adjust_pll(struct ata_host *host, long pll_clock, unsigned int board_idx) { void __iomem *mmio_base = host->iomap[PDC_MMIO_BAR]; u16 pll_ctl; long pll_clock_khz = pll_clock / 1000; long pout_required = board_idx? PDC_133_MHZ:PDC_100_MHZ; long ratio = pout_required / pll_clock_khz; int F, R; /* Sanity check */ if (unlikely(pll_clock_khz < 5000L || pll_clock_khz > 70000L)) { printk(KERN_ERR DRV_NAME ": Invalid PLL input clock %ldkHz, give up!\n", pll_clock_khz); return; } #ifdef PDC_DEBUG PDPRINTK("pout_required is %ld\n", pout_required); /* Show the current clock value of PLL control register * (maybe already configured by the firmware) */ pll_ctl = ioread16(mmio_base + PDC_PLL_CTL); PDPRINTK("pll_ctl[%X]\n", pll_ctl); #endif /* * Calculate the ratio of F, R and OD * POUT = (F + 2) / (( R + 2) * NO) */ if (ratio < 8600L) { /* 8.6x */ /* Using NO = 0x01, R = 0x0D */ R = 0x0d; } else if (ratio < 12900L) { /* 12.9x */ /* Using NO = 0x01, R = 0x08 */ R = 0x08; } else if (ratio < 16100L) { /* 16.1x */ /* Using NO = 0x01, R = 0x06 */ R = 0x06; } else if (ratio < 64000L) { /* 64x */ R = 0x00; } else { /* Invalid ratio */ printk(KERN_ERR DRV_NAME ": Invalid ratio %ld, give up!\n", ratio); return; } F = (ratio * (R+2)) / 1000 - 2; if (unlikely(F < 0 || F > 127)) { /* Invalid F */ printk(KERN_ERR DRV_NAME ": F[%d] invalid!\n", F); return; } PDPRINTK("F[%d] R[%d] ratio*1000[%ld]\n", F, R, ratio); pll_ctl = (R << 8) | F; PDPRINTK("Writing pll_ctl[%X]\n", pll_ctl); iowrite16(pll_ctl, mmio_base + PDC_PLL_CTL); ioread16(mmio_base + PDC_PLL_CTL); /* flush */ /* Wait the PLL circuit to be stable */ mdelay(30); #ifdef PDC_DEBUG /* * Show the current clock value of PLL control register * (maybe configured by the firmware) */ pll_ctl = ioread16(mmio_base + PDC_PLL_CTL); PDPRINTK("pll_ctl[%X]\n", pll_ctl); #endif return; } /** * detect_pll_input_clock - Detect the PLL input clock in Hz. * @host: target ATA host * Ex. 16949000 on 33MHz PCI bus for pdc20275. * Half of the PCI clock. */ static long pdc_detect_pll_input_clock(struct ata_host *host) { void __iomem *mmio_base = host->iomap[PDC_MMIO_BAR]; u32 scr; long start_count, end_count; struct timeval start_time, end_time; long pll_clock, usec_elapsed; /* Start the test mode */ scr = ioread32(mmio_base + PDC_SYS_CTL); PDPRINTK("scr[%X]\n", scr); iowrite32(scr | (0x01 << 14), mmio_base + PDC_SYS_CTL); ioread32(mmio_base + PDC_SYS_CTL); /* flush */ /* Read current counter value */ start_count = pdc_read_counter(host); do_gettimeofday(&start_time); /* Let the counter run for 100 ms. */ mdelay(100); /* Read the counter values again */ end_count = pdc_read_counter(host); do_gettimeofday(&end_time); /* Stop the test mode */ scr = ioread32(mmio_base + PDC_SYS_CTL); PDPRINTK("scr[%X]\n", scr); iowrite32(scr & ~(0x01 << 14), mmio_base + PDC_SYS_CTL); ioread32(mmio_base + PDC_SYS_CTL); /* flush */ /* calculate the input clock in Hz */ usec_elapsed = (end_time.tv_sec - start_time.tv_sec) * 1000000 + (end_time.tv_usec - start_time.tv_usec); pll_clock = ((start_count - end_count) & 0x3fffffff) / 100 * (100000000 / usec_elapsed); PDPRINTK("start[%ld] end[%ld] \n", start_count, end_count); PDPRINTK("PLL input clock[%ld]Hz\n", pll_clock); return pll_clock; } /** * pdc_hardware_init - Initialize the hardware. * @host: target ATA host * @board_idx: board identifier */ static int pdc_hardware_init(struct ata_host *host, unsigned int board_idx) { long pll_clock; /* * Detect PLL input clock rate. * On some system, where PCI bus is running at non-standard clock rate. * Ex. 25MHz or 40MHz, we have to adjust the cycle_time. * The pdc20275 controller employs PLL circuit to help correct timing registers setting. */ pll_clock = pdc_detect_pll_input_clock(host); dev_printk(KERN_INFO, host->dev, "PLL input clock %ld kHz\n", pll_clock/1000); /* Adjust PLL control register */ pdc_adjust_pll(host, pll_clock, board_idx); return 0; } /** * pdc_ata_setup_port - setup the mmio address * @port: ata ioports to setup * @base: base address */ static void pdc_ata_setup_port(struct ata_ioports *port, void __iomem *base) { port->cmd_addr = port->data_addr = base; port->feature_addr = port->error_addr = base + 0x05; port->nsect_addr = base + 0x0a; port->lbal_addr = base + 0x0f; port->lbam_addr = base + 0x10; port->lbah_addr = base + 0x15; port->device_addr = base + 0x1a; port->command_addr = port->status_addr = base + 0x1f; port->altstatus_addr = port->ctl_addr = base + 0x81a; } /** * pdc2027x_init_one - PCI probe function * Called when an instance of PCI adapter is inserted. * This function checks whether the hardware is supported, * initialize hardware and register an instance of ata_host to * libata. (implements struct pci_driver.probe() ) * * @pdev: instance of pci_dev found * @ent: matching entry in the id_tbl[] */ static int __devinit pdc2027x_init_one(struct pci_dev *pdev, const struct pci_device_id *ent) { static int printed_version; static const unsigned long cmd_offset[] = { 0x17c0, 0x15c0 }; static const unsigned long bmdma_offset[] = { 0x1000, 0x1008 }; unsigned int board_idx = (unsigned int) ent->driver_data; const struct ata_port_info *ppi[] = { &pdc2027x_port_info[board_idx], NULL }; struct ata_host *host; void __iomem *mmio_base; int i, rc; if (!printed_version++) dev_printk(KERN_DEBUG, &pdev->dev, "version " DRV_VERSION "\n"); /* alloc host */ host = ata_host_alloc_pinfo(&pdev->dev, ppi, 2); if (!host) return -ENOMEM; /* acquire resources and fill host */ rc = pcim_enable_device(pdev); if (rc) return rc; rc = pcim_iomap_regions(pdev, 1 << PDC_MMIO_BAR, DRV_NAME); if (rc) return rc; host->iomap = pcim_iomap_table(pdev); rc = pci_set_dma_mask(pdev, ATA_DMA_MASK); if (rc) return rc; rc = pci_set_consistent_dma_mask(pdev, ATA_DMA_MASK); if (rc) return rc; mmio_base = host->iomap[PDC_MMIO_BAR]; for (i = 0; i < 2; i++) { struct ata_port *ap = host->ports[i]; pdc_ata_setup_port(&ap->ioaddr, mmio_base + cmd_offset[i]); ap->ioaddr.bmdma_addr = mmio_base + bmdma_offset[i]; ata_port_pbar_desc(ap, PDC_MMIO_BAR, -1, "mmio"); ata_port_pbar_desc(ap, PDC_MMIO_BAR, cmd_offset[i], "cmd"); } //pci_enable_intx(pdev); /* initialize adapter */ if (pdc_hardware_init(host, board_idx) != 0) return -EIO; pci_set_master(pdev); return ata_host_activate(host, pdev->irq, ata_interrupt, IRQF_SHARED, &pdc2027x_sht); } /** * pdc2027x_init - Called after this module is loaded into the kernel. */ static int __init pdc2027x_init(void) { return pci_register_driver(&pdc2027x_pci_driver); } /** * pdc2027x_exit - Called before this module unloaded from the kernel */ static void __exit pdc2027x_exit(void) { pci_unregister_driver(&pdc2027x_pci_driver); } module_init(pdc2027x_init); module_exit(pdc2027x_exit);