2 * Promise PATA TX2/TX4/TX2000/133 IDE driver for pdc20268 to pdc20277.
4 * This program is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU General Public License
6 * as published by the Free Software Foundation; either version
7 * 2 of the License, or (at your option) any later version.
10 * Albert Lee <albertcc@tw.ibm.com> IBM Corporation
12 * Copyright (C) 1998-2002 Andre Hedrick <andre@linux-ide.org>
13 * Portions Copyright (C) 1999 Promise Technology, Inc.
15 * Author: Frank Tiernan (frankt@promise.com)
16 * Released under terms of General Public License
19 * libata documentation is available via 'make {ps|pdf}docs',
20 * as Documentation/DocBook/libata.*
22 * Hardware information only available under NDA.
25 #include <linux/kernel.h>
26 #include <linux/module.h>
27 #include <linux/pci.h>
28 #include <linux/init.h>
29 #include <linux/blkdev.h>
30 #include <linux/delay.h>
31 #include <linux/device.h>
32 #include <scsi/scsi.h>
33 #include <scsi/scsi_host.h>
34 #include <scsi/scsi_cmnd.h>
35 #include <linux/libata.h>
37 #define DRV_NAME "pata_pdc2027x"
38 #define DRV_VERSION "0.74-ac5"
42 #define PDPRINTK(fmt, args...) printk(KERN_ERR "%s: " fmt, __FUNCTION__, ## args)
44 #define PDPRINTK(fmt, args...)
53 PDC_100_MHZ = 100000000,
54 PDC_133_MHZ = 133333333,
58 PDC_GLOBAL_CTL = 0x1108,
61 PDC_BYTE_COUNT = 0x1120,
65 static int pdc2027x_init_one(struct pci_dev *pdev, const struct pci_device_id *ent);
66 static void pdc2027x_error_handler(struct ata_port *ap);
67 static void pdc2027x_set_piomode(struct ata_port *ap, struct ata_device *adev);
68 static void pdc2027x_set_dmamode(struct ata_port *ap, struct ata_device *adev);
69 static void pdc2027x_post_set_mode(struct ata_port *ap);
70 static int pdc2027x_check_atapi_dma(struct ata_queued_cmd *qc);
73 * ATA Timing Tables based on 133MHz controller clock.
74 * These tables are only used when the controller is in 133MHz clock.
75 * If the controller is in 100MHz clock, the ASIC hardware will
76 * set the timing registers automatically when "set feature" command
77 * is issued to the device. However, if the controller clock is 133MHz,
78 * the following tables must be used.
80 static struct pdc2027x_pio_timing {
81 u8 value0, value1, value2;
82 } pdc2027x_pio_timing_tbl [] = {
83 { 0xfb, 0x2b, 0xac }, /* PIO mode 0 */
84 { 0x46, 0x29, 0xa4 }, /* PIO mode 1 */
85 { 0x23, 0x26, 0x64 }, /* PIO mode 2 */
86 { 0x27, 0x0d, 0x35 }, /* PIO mode 3, IORDY on, Prefetch off */
87 { 0x23, 0x09, 0x25 }, /* PIO mode 4, IORDY on, Prefetch off */
90 static struct pdc2027x_mdma_timing {
92 } pdc2027x_mdma_timing_tbl [] = {
93 { 0xdf, 0x5f }, /* MDMA mode 0 */
94 { 0x6b, 0x27 }, /* MDMA mode 1 */
95 { 0x69, 0x25 }, /* MDMA mode 2 */
98 static struct pdc2027x_udma_timing {
99 u8 value0, value1, value2;
100 } pdc2027x_udma_timing_tbl [] = {
101 { 0x4a, 0x0f, 0xd5 }, /* UDMA mode 0 */
102 { 0x3a, 0x0a, 0xd0 }, /* UDMA mode 1 */
103 { 0x2a, 0x07, 0xcd }, /* UDMA mode 2 */
104 { 0x1a, 0x05, 0xcd }, /* UDMA mode 3 */
105 { 0x1a, 0x03, 0xcd }, /* UDMA mode 4 */
106 { 0x1a, 0x02, 0xcb }, /* UDMA mode 5 */
107 { 0x1a, 0x01, 0xcb }, /* UDMA mode 6 */
110 static const struct pci_device_id pdc2027x_pci_tbl[] = {
111 { PCI_VDEVICE(PROMISE, PCI_DEVICE_ID_PROMISE_20268), PDC_UDMA_100 },
112 { PCI_VDEVICE(PROMISE, PCI_DEVICE_ID_PROMISE_20269), PDC_UDMA_133 },
113 { PCI_VDEVICE(PROMISE, PCI_DEVICE_ID_PROMISE_20270), PDC_UDMA_100 },
114 { PCI_VDEVICE(PROMISE, PCI_DEVICE_ID_PROMISE_20271), PDC_UDMA_133 },
115 { PCI_VDEVICE(PROMISE, PCI_DEVICE_ID_PROMISE_20275), PDC_UDMA_133 },
116 { PCI_VDEVICE(PROMISE, PCI_DEVICE_ID_PROMISE_20276), PDC_UDMA_133 },
117 { PCI_VDEVICE(PROMISE, PCI_DEVICE_ID_PROMISE_20277), PDC_UDMA_133 },
119 { } /* terminate list */
122 static struct pci_driver pdc2027x_pci_driver = {
124 .id_table = pdc2027x_pci_tbl,
125 .probe = pdc2027x_init_one,
126 .remove = ata_pci_remove_one,
129 static struct scsi_host_template pdc2027x_sht = {
130 .module = THIS_MODULE,
132 .ioctl = ata_scsi_ioctl,
133 .queuecommand = ata_scsi_queuecmd,
134 .can_queue = ATA_DEF_QUEUE,
135 .this_id = ATA_SHT_THIS_ID,
136 .sg_tablesize = LIBATA_MAX_PRD,
137 .cmd_per_lun = ATA_SHT_CMD_PER_LUN,
138 .emulated = ATA_SHT_EMULATED,
139 .use_clustering = ATA_SHT_USE_CLUSTERING,
140 .proc_name = DRV_NAME,
141 .dma_boundary = ATA_DMA_BOUNDARY,
142 .slave_configure = ata_scsi_slave_config,
143 .slave_destroy = ata_scsi_slave_destroy,
144 .bios_param = ata_std_bios_param,
147 static struct ata_port_operations pdc2027x_pata100_ops = {
148 .port_disable = ata_port_disable,
150 .tf_load = ata_tf_load,
151 .tf_read = ata_tf_read,
152 .check_status = ata_check_status,
153 .exec_command = ata_exec_command,
154 .dev_select = ata_std_dev_select,
156 .check_atapi_dma = pdc2027x_check_atapi_dma,
157 .bmdma_setup = ata_bmdma_setup,
158 .bmdma_start = ata_bmdma_start,
159 .bmdma_stop = ata_bmdma_stop,
160 .bmdma_status = ata_bmdma_status,
161 .qc_prep = ata_qc_prep,
162 .qc_issue = ata_qc_issue_prot,
163 .data_xfer = ata_data_xfer,
165 .freeze = ata_bmdma_freeze,
166 .thaw = ata_bmdma_thaw,
167 .error_handler = pdc2027x_error_handler,
168 .post_internal_cmd = ata_bmdma_post_internal_cmd,
170 .irq_handler = ata_interrupt,
171 .irq_clear = ata_bmdma_irq_clear,
172 .irq_on = ata_irq_on,
173 .irq_ack = ata_irq_ack,
175 .port_start = ata_port_start,
178 static struct ata_port_operations pdc2027x_pata133_ops = {
179 .port_disable = ata_port_disable,
180 .set_piomode = pdc2027x_set_piomode,
181 .set_dmamode = pdc2027x_set_dmamode,
182 .post_set_mode = pdc2027x_post_set_mode,
184 .tf_load = ata_tf_load,
185 .tf_read = ata_tf_read,
186 .check_status = ata_check_status,
187 .exec_command = ata_exec_command,
188 .dev_select = ata_std_dev_select,
190 .check_atapi_dma = pdc2027x_check_atapi_dma,
191 .bmdma_setup = ata_bmdma_setup,
192 .bmdma_start = ata_bmdma_start,
193 .bmdma_stop = ata_bmdma_stop,
194 .bmdma_status = ata_bmdma_status,
195 .qc_prep = ata_qc_prep,
196 .qc_issue = ata_qc_issue_prot,
197 .data_xfer = ata_data_xfer,
199 .freeze = ata_bmdma_freeze,
200 .thaw = ata_bmdma_thaw,
201 .error_handler = pdc2027x_error_handler,
202 .post_internal_cmd = ata_bmdma_post_internal_cmd,
204 .irq_handler = ata_interrupt,
205 .irq_clear = ata_bmdma_irq_clear,
206 .irq_on = ata_irq_on,
207 .irq_ack = ata_irq_ack,
209 .port_start = ata_port_start,
212 static struct ata_port_info pdc2027x_port_info[] = {
215 .sht = &pdc2027x_sht,
216 .flags = ATA_FLAG_NO_LEGACY | ATA_FLAG_SLAVE_POSS |
218 .pio_mask = 0x1f, /* pio0-4 */
219 .mwdma_mask = 0x07, /* mwdma0-2 */
220 .udma_mask = ATA_UDMA5, /* udma0-5 */
221 .port_ops = &pdc2027x_pata100_ops,
225 .sht = &pdc2027x_sht,
226 .flags = ATA_FLAG_NO_LEGACY | ATA_FLAG_SLAVE_POSS |
228 .pio_mask = 0x1f, /* pio0-4 */
229 .mwdma_mask = 0x07, /* mwdma0-2 */
230 .udma_mask = ATA_UDMA6, /* udma0-6 */
231 .port_ops = &pdc2027x_pata133_ops,
235 MODULE_AUTHOR("Andre Hedrick, Frank Tiernan, Albert Lee");
236 MODULE_DESCRIPTION("libata driver module for Promise PDC20268 to PDC20277");
237 MODULE_LICENSE("GPL");
238 MODULE_VERSION(DRV_VERSION);
239 MODULE_DEVICE_TABLE(pci, pdc2027x_pci_tbl);
242 * port_mmio - Get the MMIO address of PDC2027x extended registers
244 * @offset: offset from mmio base
246 static inline void __iomem *port_mmio(struct ata_port *ap, unsigned int offset)
248 return ap->host->iomap[PDC_MMIO_BAR] + ap->port_no * 0x100 + offset;
252 * dev_mmio - Get the MMIO address of PDC2027x extended registers
255 * @offset: offset from mmio base
257 static inline void __iomem *dev_mmio(struct ata_port *ap, struct ata_device *adev, unsigned int offset)
259 u8 adj = (adev->devno) ? 0x08 : 0x00;
260 return port_mmio(ap, offset) + adj;
264 * pdc2027x_pata_cbl_detect - Probe host controller cable detect info
265 * @ap: Port for which cable detect info is desired
267 * Read 80c cable indicator from Promise extended register.
268 * This register is latched when the system is reset.
271 * None (inherited from caller).
273 static void pdc2027x_cbl_detect(struct ata_port *ap)
277 /* check cable detect results */
278 cgcr = readl(port_mmio(ap, PDC_GLOBAL_CTL));
279 if (cgcr & (1 << 26))
282 PDPRINTK("No cable or 80-conductor cable on port %d\n", ap->port_no);
284 ap->cbl = ATA_CBL_PATA80;
288 printk(KERN_INFO DRV_NAME ": 40-conductor cable detected on port %d\n", ap->port_no);
289 ap->cbl = ATA_CBL_PATA40;
290 ap->udma_mask &= ATA_UDMA_MASK_40C;
294 * pdc2027x_port_enabled - Check PDC ATA control register to see whether the port is enabled.
297 static inline int pdc2027x_port_enabled(struct ata_port *ap)
299 return readb(port_mmio(ap, PDC_ATA_CTL)) & 0x02;
303 * pdc2027x_prereset - prereset for PATA host controller
306 * Probeinit including cable detection.
309 * None (inherited from caller).
312 static int pdc2027x_prereset(struct ata_port *ap)
314 /* Check whether port enabled */
315 if (!pdc2027x_port_enabled(ap))
317 pdc2027x_cbl_detect(ap);
318 return ata_std_prereset(ap);
322 * pdc2027x_error_handler - Perform reset on PATA port and classify
325 * Reset PATA phy and classify attached devices.
328 * None (inherited from caller).
331 static void pdc2027x_error_handler(struct ata_port *ap)
333 ata_bmdma_drive_eh(ap, pdc2027x_prereset, ata_std_softreset, NULL, ata_std_postreset);
337 * pdc2027x_set_piomode - Initialize host controller PATA PIO timings
338 * @ap: Port to configure
340 * @pio: PIO mode, 0 - 4
342 * Set PIO mode for device.
345 * None (inherited from caller).
348 static void pdc2027x_set_piomode(struct ata_port *ap, struct ata_device *adev)
350 unsigned int pio = adev->pio_mode - XFER_PIO_0;
353 PDPRINTK("adev->pio_mode[%X]\n", adev->pio_mode);
357 printk(KERN_ERR DRV_NAME ": Unknown pio mode [%d] ignored\n", pio);
362 /* Set the PIO timing registers using value table for 133MHz */
363 PDPRINTK("Set pio regs... \n");
365 ctcr0 = readl(dev_mmio(ap, adev, PDC_CTCR0));
367 ctcr0 |= pdc2027x_pio_timing_tbl[pio].value0 |
368 (pdc2027x_pio_timing_tbl[pio].value1 << 8);
369 writel(ctcr0, dev_mmio(ap, adev, PDC_CTCR0));
371 ctcr1 = readl(dev_mmio(ap, adev, PDC_CTCR1));
373 ctcr1 |= (pdc2027x_pio_timing_tbl[pio].value2 << 24);
374 writel(ctcr1, dev_mmio(ap, adev, PDC_CTCR1));
376 PDPRINTK("Set pio regs done\n");
378 PDPRINTK("Set to pio mode[%u] \n", pio);
382 * pdc2027x_set_dmamode - Initialize host controller PATA UDMA timings
383 * @ap: Port to configure
385 * @udma: udma mode, XFER_UDMA_0 to XFER_UDMA_6
387 * Set UDMA mode for device.
390 * None (inherited from caller).
392 static void pdc2027x_set_dmamode(struct ata_port *ap, struct ata_device *adev)
394 unsigned int dma_mode = adev->dma_mode;
397 if ((dma_mode >= XFER_UDMA_0) &&
398 (dma_mode <= XFER_UDMA_6)) {
399 /* Set the UDMA timing registers with value table for 133MHz */
400 unsigned int udma_mode = dma_mode & 0x07;
402 if (dma_mode == XFER_UDMA_2) {
405 * If tHOLD is '1', the hardware will add half clock for data hold time.
406 * This code segment seems to be no effect. tHOLD will be overwritten below.
408 ctcr1 = readl(dev_mmio(ap, adev, PDC_CTCR1));
409 writel(ctcr1 & ~(1 << 7), dev_mmio(ap, adev, PDC_CTCR1));
412 PDPRINTK("Set udma regs... \n");
414 ctcr1 = readl(dev_mmio(ap, adev, PDC_CTCR1));
416 ctcr1 |= pdc2027x_udma_timing_tbl[udma_mode].value0 |
417 (pdc2027x_udma_timing_tbl[udma_mode].value1 << 8) |
418 (pdc2027x_udma_timing_tbl[udma_mode].value2 << 16);
419 writel(ctcr1, dev_mmio(ap, adev, PDC_CTCR1));
421 PDPRINTK("Set udma regs done\n");
423 PDPRINTK("Set to udma mode[%u] \n", udma_mode);
425 } else if ((dma_mode >= XFER_MW_DMA_0) &&
426 (dma_mode <= XFER_MW_DMA_2)) {
427 /* Set the MDMA timing registers with value table for 133MHz */
428 unsigned int mdma_mode = dma_mode & 0x07;
430 PDPRINTK("Set mdma regs... \n");
431 ctcr0 = readl(dev_mmio(ap, adev, PDC_CTCR0));
434 ctcr0 |= (pdc2027x_mdma_timing_tbl[mdma_mode].value0 << 16) |
435 (pdc2027x_mdma_timing_tbl[mdma_mode].value1 << 24);
437 writel(ctcr0, dev_mmio(ap, adev, PDC_CTCR0));
438 PDPRINTK("Set mdma regs done\n");
440 PDPRINTK("Set to mdma mode[%u] \n", mdma_mode);
442 printk(KERN_ERR DRV_NAME ": Unknown dma mode [%u] ignored\n", dma_mode);
447 * pdc2027x_post_set_mode - Set the timing registers back to correct values.
448 * @ap: Port to configure
450 * The pdc2027x hardware will look at "SET FEATURES" and change the timing registers
451 * automatically. The values set by the hardware might be incorrect, under 133Mhz PLL.
452 * This function overwrites the possibly incorrect values set by the hardware to be correct.
454 static void pdc2027x_post_set_mode(struct ata_port *ap)
458 for (i = 0; i < ATA_MAX_DEVICES; i++) {
459 struct ata_device *dev = &ap->device[i];
461 if (ata_dev_enabled(dev)) {
463 pdc2027x_set_piomode(ap, dev);
466 * Enable prefetch if the device support PIO only.
468 if (dev->xfer_shift == ATA_SHIFT_PIO) {
469 u32 ctcr1 = readl(dev_mmio(ap, dev, PDC_CTCR1));
471 writel(ctcr1, dev_mmio(ap, dev, PDC_CTCR1));
473 PDPRINTK("Turn on prefetch\n");
475 pdc2027x_set_dmamode(ap, dev);
482 * pdc2027x_check_atapi_dma - Check whether ATAPI DMA can be supported for this command
483 * @qc: Metadata associated with taskfile to check
486 * None (inherited from caller).
488 * RETURNS: 0 when ATAPI DMA can be used
491 static int pdc2027x_check_atapi_dma(struct ata_queued_cmd *qc)
493 struct scsi_cmnd *cmd = qc->scsicmd;
494 u8 *scsicmd = cmd->cmnd;
495 int rc = 1; /* atapi dma off by default */
498 * This workaround is from Promise's GPL driver.
499 * If ATAPI DMA is used for commands not in the
500 * following white list, say MODE_SENSE and REQUEST_SENSE,
501 * pdc2027x might hit the irq lost problem.
503 switch (scsicmd[0]) {
510 case 0xad: /* READ_DVD_STRUCTURE */
511 case 0xbe: /* READ_CD */
512 /* ATAPI DMA is ok */
523 * pdc_read_counter - Read the ctr counter
524 * @probe_ent: for the port address
527 static long pdc_read_counter(struct ata_probe_ent *probe_ent)
529 void __iomem *mmio_base = probe_ent->iomap[PDC_MMIO_BAR];
532 u32 bccrl, bccrh, bccrlv, bccrhv;
535 bccrl = readl(mmio_base + PDC_BYTE_COUNT) & 0xffff;
536 bccrh = readl(mmio_base + PDC_BYTE_COUNT + 0x100) & 0xffff;
539 /* Read the counter values again for verification */
540 bccrlv = readl(mmio_base + PDC_BYTE_COUNT) & 0xffff;
541 bccrhv = readl(mmio_base + PDC_BYTE_COUNT + 0x100) & 0xffff;
544 counter = (bccrh << 15) | bccrl;
546 PDPRINTK("bccrh [%X] bccrl [%X]\n", bccrh, bccrl);
547 PDPRINTK("bccrhv[%X] bccrlv[%X]\n", bccrhv, bccrlv);
550 * The 30-bit decreasing counter are read by 2 pieces.
551 * Incorrect value may be read when both bccrh and bccrl are changing.
552 * Ex. When 7900 decrease to 78FF, wrong value 7800 might be read.
554 if (retry && !(bccrh == bccrhv && bccrl >= bccrlv)) {
556 PDPRINTK("rereading counter\n");
564 * adjust_pll - Adjust the PLL input clock in Hz.
566 * @pdc_controller: controller specific information
567 * @probe_ent: For the port address
568 * @pll_clock: The input of PLL in HZ
570 static void pdc_adjust_pll(struct ata_probe_ent *probe_ent, long pll_clock, unsigned int board_idx)
572 void __iomem *mmio_base = probe_ent->iomap[PDC_MMIO_BAR];
574 long pll_clock_khz = pll_clock / 1000;
575 long pout_required = board_idx? PDC_133_MHZ:PDC_100_MHZ;
576 long ratio = pout_required / pll_clock_khz;
580 if (unlikely(pll_clock_khz < 5000L || pll_clock_khz > 70000L)) {
581 printk(KERN_ERR DRV_NAME ": Invalid PLL input clock %ldkHz, give up!\n", pll_clock_khz);
586 PDPRINTK("pout_required is %ld\n", pout_required);
588 /* Show the current clock value of PLL control register
589 * (maybe already configured by the firmware)
591 pll_ctl = readw(mmio_base + PDC_PLL_CTL);
593 PDPRINTK("pll_ctl[%X]\n", pll_ctl);
597 * Calculate the ratio of F, R and OD
598 * POUT = (F + 2) / (( R + 2) * NO)
600 if (ratio < 8600L) { /* 8.6x */
601 /* Using NO = 0x01, R = 0x0D */
603 } else if (ratio < 12900L) { /* 12.9x */
604 /* Using NO = 0x01, R = 0x08 */
606 } else if (ratio < 16100L) { /* 16.1x */
607 /* Using NO = 0x01, R = 0x06 */
609 } else if (ratio < 64000L) { /* 64x */
613 printk(KERN_ERR DRV_NAME ": Invalid ratio %ld, give up!\n", ratio);
617 F = (ratio * (R+2)) / 1000 - 2;
619 if (unlikely(F < 0 || F > 127)) {
621 printk(KERN_ERR DRV_NAME ": F[%d] invalid!\n", F);
625 PDPRINTK("F[%d] R[%d] ratio*1000[%ld]\n", F, R, ratio);
627 pll_ctl = (R << 8) | F;
629 PDPRINTK("Writing pll_ctl[%X]\n", pll_ctl);
631 writew(pll_ctl, mmio_base + PDC_PLL_CTL);
632 readw(mmio_base + PDC_PLL_CTL); /* flush */
634 /* Wait the PLL circuit to be stable */
639 * Show the current clock value of PLL control register
640 * (maybe configured by the firmware)
642 pll_ctl = readw(mmio_base + PDC_PLL_CTL);
644 PDPRINTK("pll_ctl[%X]\n", pll_ctl);
651 * detect_pll_input_clock - Detect the PLL input clock in Hz.
652 * @probe_ent: for the port address
653 * Ex. 16949000 on 33MHz PCI bus for pdc20275.
654 * Half of the PCI clock.
656 static long pdc_detect_pll_input_clock(struct ata_probe_ent *probe_ent)
658 void __iomem *mmio_base = probe_ent->iomap[PDC_MMIO_BAR];
660 long start_count, end_count;
663 /* Read current counter value */
664 start_count = pdc_read_counter(probe_ent);
666 /* Start the test mode */
667 scr = readl(mmio_base + PDC_SYS_CTL);
668 PDPRINTK("scr[%X]\n", scr);
669 writel(scr | (0x01 << 14), mmio_base + PDC_SYS_CTL);
670 readl(mmio_base + PDC_SYS_CTL); /* flush */
672 /* Let the counter run for 100 ms. */
675 /* Read the counter values again */
676 end_count = pdc_read_counter(probe_ent);
678 /* Stop the test mode */
679 scr = readl(mmio_base + PDC_SYS_CTL);
680 PDPRINTK("scr[%X]\n", scr);
681 writel(scr & ~(0x01 << 14), mmio_base + PDC_SYS_CTL);
682 readl(mmio_base + PDC_SYS_CTL); /* flush */
684 /* calculate the input clock in Hz */
685 pll_clock = (start_count - end_count) * 10;
687 PDPRINTK("start[%ld] end[%ld] \n", start_count, end_count);
688 PDPRINTK("PLL input clock[%ld]Hz\n", pll_clock);
694 * pdc_hardware_init - Initialize the hardware.
695 * @pdev: instance of pci_dev found
696 * @pdc_controller: controller specific information
697 * @pe: for the port address
699 static int pdc_hardware_init(struct pci_dev *pdev, struct ata_probe_ent *pe, unsigned int board_idx)
704 * Detect PLL input clock rate.
705 * On some system, where PCI bus is running at non-standard clock rate.
706 * Ex. 25MHz or 40MHz, we have to adjust the cycle_time.
707 * The pdc20275 controller employs PLL circuit to help correct timing registers setting.
709 pll_clock = pdc_detect_pll_input_clock(pe);
711 if (pll_clock < 0) /* counter overflow? Try again. */
712 pll_clock = pdc_detect_pll_input_clock(pe);
714 dev_printk(KERN_INFO, &pdev->dev, "PLL input clock %ld kHz\n", pll_clock/1000);
716 /* Adjust PLL control register */
717 pdc_adjust_pll(pe, pll_clock, board_idx);
723 * pdc_ata_setup_port - setup the mmio address
724 * @port: ata ioports to setup
725 * @base: base address
727 static void pdc_ata_setup_port(struct ata_ioports *port, void __iomem *base)
730 port->data_addr = base;
732 port->error_addr = base + 0x05;
733 port->nsect_addr = base + 0x0a;
734 port->lbal_addr = base + 0x0f;
735 port->lbam_addr = base + 0x10;
736 port->lbah_addr = base + 0x15;
737 port->device_addr = base + 0x1a;
739 port->status_addr = base + 0x1f;
740 port->altstatus_addr =
741 port->ctl_addr = base + 0x81a;
745 * pdc2027x_init_one - PCI probe function
746 * Called when an instance of PCI adapter is inserted.
747 * This function checks whether the hardware is supported,
748 * initialize hardware and register an instance of ata_host to
749 * libata by providing struct ata_probe_ent and ata_device_add().
750 * (implements struct pci_driver.probe() )
752 * @pdev: instance of pci_dev found
753 * @ent: matching entry in the id_tbl[]
755 static int __devinit pdc2027x_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
757 static int printed_version;
758 unsigned int board_idx = (unsigned int) ent->driver_data;
760 struct ata_probe_ent *probe_ent;
761 void __iomem *mmio_base;
764 if (!printed_version++)
765 dev_printk(KERN_DEBUG, &pdev->dev, "version " DRV_VERSION "\n");
767 rc = pcim_enable_device(pdev);
771 rc = pcim_iomap_regions(pdev, 1 << PDC_MMIO_BAR, DRV_NAME);
775 rc = pci_set_dma_mask(pdev, ATA_DMA_MASK);
779 rc = pci_set_consistent_dma_mask(pdev, ATA_DMA_MASK);
783 /* Prepare the probe entry */
784 probe_ent = devm_kzalloc(&pdev->dev, sizeof(*probe_ent), GFP_KERNEL);
785 if (probe_ent == NULL)
788 probe_ent->dev = pci_dev_to_dev(pdev);
789 INIT_LIST_HEAD(&probe_ent->node);
791 probe_ent->sht = pdc2027x_port_info[board_idx].sht;
792 probe_ent->port_flags = pdc2027x_port_info[board_idx].flags;
793 probe_ent->pio_mask = pdc2027x_port_info[board_idx].pio_mask;
794 probe_ent->mwdma_mask = pdc2027x_port_info[board_idx].mwdma_mask;
795 probe_ent->udma_mask = pdc2027x_port_info[board_idx].udma_mask;
796 probe_ent->port_ops = pdc2027x_port_info[board_idx].port_ops;
798 probe_ent->irq = pdev->irq;
799 probe_ent->irq_flags = IRQF_SHARED;
800 probe_ent->iomap = pcim_iomap_table(pdev);
802 mmio_base = probe_ent->iomap[PDC_MMIO_BAR];
804 pdc_ata_setup_port(&probe_ent->port[0], mmio_base + 0x17c0);
805 probe_ent->port[0].bmdma_addr = mmio_base + 0x1000;
806 pdc_ata_setup_port(&probe_ent->port[1], mmio_base + 0x15c0);
807 probe_ent->port[1].bmdma_addr = mmio_base + 0x1008;
809 probe_ent->n_ports = 2;
811 pci_set_master(pdev);
812 //pci_enable_intx(pdev);
814 /* initialize adapter */
815 if (pdc_hardware_init(pdev, probe_ent, board_idx) != 0)
818 if (!ata_device_add(probe_ent))
821 devm_kfree(&pdev->dev, probe_ent);
826 * pdc2027x_init - Called after this module is loaded into the kernel.
828 static int __init pdc2027x_init(void)
830 return pci_register_driver(&pdc2027x_pci_driver);
834 * pdc2027x_exit - Called before this module unloaded from the kernel
836 static void __exit pdc2027x_exit(void)
838 pci_unregister_driver(&pdc2027x_pci_driver);
841 module_init(pdc2027x_init);
842 module_exit(pdc2027x_exit);