2 * drivers/ata/pata_arasan_cf.c
4 * Arasan Compact Flash host controller source file
6 * Copyright (C) 2011 ST Microelectronics
7 * Viresh Kumar <viresh.linux@gmail.com>
9 * This file is licensed under the terms of the GNU General Public
10 * License version 2. This program is licensed "as is" without any
11 * warranty of any kind, whether express or implied.
15 * The Arasan CompactFlash Device Controller IP core has three basic modes of
16 * operation: PC card ATA using I/O mode, PC card ATA using memory mode, PC card
17 * ATA using true IDE modes. This driver supports only True IDE mode currently.
19 * Arasan CF Controller shares global irq register with Arasan XD Controller.
21 * Tested on arch/arm/mach-spear13xx
24 #include <linux/ata.h>
25 #include <linux/clk.h>
26 #include <linux/completion.h>
27 #include <linux/delay.h>
28 #include <linux/dmaengine.h>
30 #include <linux/irq.h>
31 #include <linux/kernel.h>
32 #include <linux/libata.h>
33 #include <linux/module.h>
34 #include <linux/pata_arasan_cf_data.h>
35 #include <linux/platform_device.h>
37 #include <linux/slab.h>
38 #include <linux/spinlock.h>
39 #include <linux/types.h>
40 #include <linux/workqueue.h>
42 #define DRIVER_NAME "arasan_cf"
43 #define TIMEOUT msecs_to_jiffies(3000)
46 /* CompactFlash Interface Status */
49 #define BIN_AUDIO_OUT (1 << 1)
50 #define CARD_DETECT1 (1 << 2)
51 #define CARD_DETECT2 (1 << 3)
52 #define INP_ACK (1 << 4)
53 #define CARD_READY (1 << 5)
54 #define IO_READY (1 << 6)
55 #define B16_IO_PORT_SEL (1 << 7)
58 /* Interrupt Enable */
60 #define CARD_DETECT_IRQ (1)
61 #define STATUS_CHNG_IRQ (1 << 1)
62 #define MEM_MODE_IRQ (1 << 2)
63 #define IO_MODE_IRQ (1 << 3)
64 #define TRUE_IDE_MODE_IRQ (1 << 8)
65 #define PIO_XFER_ERR_IRQ (1 << 9)
66 #define BUF_AVAIL_IRQ (1 << 10)
67 #define XFER_DONE_IRQ (1 << 11)
68 #define IGNORED_IRQS (STATUS_CHNG_IRQ | MEM_MODE_IRQ | IO_MODE_IRQ |\
70 #define TRUE_IDE_IRQS (CARD_DETECT_IRQ | PIO_XFER_ERR_IRQ |\
71 BUF_AVAIL_IRQ | XFER_DONE_IRQ)
74 #define CARD_MODE_MASK (0x3)
75 #define MEM_MODE (0x0)
77 #define TRUE_IDE_MODE (0x2)
79 #define CARD_TYPE_MASK (1 << 2)
81 #define CF_PLUS_CARD (1 << 2)
83 #define CARD_RESET (1 << 3)
84 #define CFHOST_ENB (1 << 4)
85 #define OUTPUTS_TRISTATE (1 << 5)
86 #define ULTRA_DMA_ENB (1 << 8)
87 #define MULTI_WORD_DMA_ENB (1 << 9)
88 #define DRQ_BLOCK_SIZE_MASK (0x3 << 11)
89 #define DRQ_BLOCK_SIZE_512 (0)
90 #define DRQ_BLOCK_SIZE_1024 (1 << 11)
91 #define DRQ_BLOCK_SIZE_2048 (2 << 11)
92 #define DRQ_BLOCK_SIZE_4096 (3 << 11)
93 /* CF Interface Clock Configuration */
95 #define CF_IF_CLK_MASK (0XF)
96 /* CF Timing Mode Configuration */
98 #define MEM_MODE_TIMING_MASK (0x3)
99 #define MEM_MODE_TIMING_250NS (0x0)
100 #define MEM_MODE_TIMING_120NS (0x1)
101 #define MEM_MODE_TIMING_100NS (0x2)
102 #define MEM_MODE_TIMING_80NS (0x3)
104 #define IO_MODE_TIMING_MASK (0x3 << 2)
105 #define IO_MODE_TIMING_250NS (0x0 << 2)
106 #define IO_MODE_TIMING_120NS (0x1 << 2)
107 #define IO_MODE_TIMING_100NS (0x2 << 2)
108 #define IO_MODE_TIMING_80NS (0x3 << 2)
110 #define TRUEIDE_PIO_TIMING_MASK (0x7 << 4)
111 #define TRUEIDE_PIO_TIMING_SHIFT 4
113 #define TRUEIDE_MWORD_DMA_TIMING_MASK (0x7 << 7)
114 #define TRUEIDE_MWORD_DMA_TIMING_SHIFT 7
116 #define ULTRA_DMA_TIMING_MASK (0x7 << 10)
117 #define ULTRA_DMA_TIMING_SHIFT 10
118 /* CF Transfer Address */
119 #define XFER_ADDR 0x014
120 #define XFER_ADDR_MASK (0x7FF)
121 #define MAX_XFER_COUNT 0x20000u
122 /* Transfer Control */
123 #define XFER_CTR 0x01C
124 #define XFER_COUNT_MASK (0x3FFFF)
125 #define ADDR_INC_DISABLE (1 << 24)
126 #define XFER_WIDTH_MASK (1 << 25)
127 #define XFER_WIDTH_8B (0)
128 #define XFER_WIDTH_16B (1 << 25)
130 #define MEM_TYPE_MASK (1 << 26)
131 #define MEM_TYPE_COMMON (0)
132 #define MEM_TYPE_ATTRIBUTE (1 << 26)
134 #define MEM_IO_XFER_MASK (1 << 27)
136 #define IO_XFER (1 << 27)
138 #define DMA_XFER_MODE (1 << 28)
140 #define AHB_BUS_NORMAL_PIO_OPRTN (~(1 << 29))
141 #define XFER_DIR_MASK (1 << 30)
142 #define XFER_READ (0)
143 #define XFER_WRITE (1 << 30)
145 #define XFER_START (1 << 31)
146 /* Write Data Port */
147 #define WRITE_PORT 0x024
149 #define READ_PORT 0x028
151 #define ATA_DATA_PORT 0x030
152 #define ATA_DATA_PORT_MASK (0xFFFF)
153 /* ATA Error/Features */
154 #define ATA_ERR_FTR 0x034
155 /* ATA Sector Count */
157 /* ATA Sector Number */
159 /* ATA Cylinder Low */
161 /* ATA Cylinder High */
163 /* ATA Select Card/Head */
165 /* ATA Status-Command */
166 #define ATA_STS_CMD 0x04C
167 /* ATA Alternate Status/Device Control */
168 #define ATA_ASTS_DCTR 0x050
169 /* Extended Write Data Port 0x200-0x3FC */
170 #define EXT_WRITE_PORT 0x200
171 /* Extended Read Data Port 0x400-0x5FC */
172 #define EXT_READ_PORT 0x400
173 #define FIFO_SIZE 0x200u
174 /* Global Interrupt Status */
175 #define GIRQ_STS 0x800
176 /* Global Interrupt Status enable */
177 #define GIRQ_STS_EN 0x804
178 /* Global Interrupt Signal enable */
179 #define GIRQ_SGN_EN 0x808
181 #define GIRQ_XD (1 << 1)
183 /* Compact Flash Controller Dev Structure */
184 struct arasan_cf_dev {
185 /* pointer to ata_host structure */
186 struct ata_host *host;
190 /* physical base address of controller */
192 /* virtual base address of controller */
197 /* status to be updated to framework regarding DMA transfer */
199 /* Card is present or Not */
203 /* Completion for transfer complete interrupt from controller */
204 struct completion cf_completion;
205 /* Completion for DMA transfer complete. */
206 struct completion dma_completion;
207 /* Dma channel allocated */
208 struct dma_chan *dma_chan;
209 /* Mask for DMA transfers */
211 /* dma channel private data */
213 /* DMA transfer work */
214 struct work_struct work;
215 /* DMA delayed finish work */
216 struct delayed_work dwork;
217 /* qc to be transferred using DMA */
218 struct ata_queued_cmd *qc;
221 static struct scsi_host_template arasan_cf_sht = {
222 ATA_BASE_SHT(DRIVER_NAME),
223 .sg_tablesize = SG_NONE,
224 .dma_boundary = 0xFFFFFFFFUL,
227 static void cf_dumpregs(struct arasan_cf_dev *acdev)
229 struct device *dev = acdev->host->dev;
231 dev_dbg(dev, ": =========== REGISTER DUMP ===========");
232 dev_dbg(dev, ": CFI_STS: %x", readl(acdev->vbase + CFI_STS));
233 dev_dbg(dev, ": IRQ_STS: %x", readl(acdev->vbase + IRQ_STS));
234 dev_dbg(dev, ": IRQ_EN: %x", readl(acdev->vbase + IRQ_EN));
235 dev_dbg(dev, ": OP_MODE: %x", readl(acdev->vbase + OP_MODE));
236 dev_dbg(dev, ": CLK_CFG: %x", readl(acdev->vbase + CLK_CFG));
237 dev_dbg(dev, ": TM_CFG: %x", readl(acdev->vbase + TM_CFG));
238 dev_dbg(dev, ": XFER_CTR: %x", readl(acdev->vbase + XFER_CTR));
239 dev_dbg(dev, ": GIRQ_STS: %x", readl(acdev->vbase + GIRQ_STS));
240 dev_dbg(dev, ": GIRQ_STS_EN: %x", readl(acdev->vbase + GIRQ_STS_EN));
241 dev_dbg(dev, ": GIRQ_SGN_EN: %x", readl(acdev->vbase + GIRQ_SGN_EN));
242 dev_dbg(dev, ": =====================================");
245 /* Enable/Disable global interrupts shared between CF and XD ctrlr. */
246 static void cf_ginterrupt_enable(struct arasan_cf_dev *acdev, bool enable)
248 /* enable should be 0 or 1 */
249 writel(enable, acdev->vbase + GIRQ_STS_EN);
250 writel(enable, acdev->vbase + GIRQ_SGN_EN);
253 /* Enable/Disable CF interrupts */
255 cf_interrupt_enable(struct arasan_cf_dev *acdev, u32 mask, bool enable)
257 u32 val = readl(acdev->vbase + IRQ_EN);
258 /* clear & enable/disable irqs */
260 writel(mask, acdev->vbase + IRQ_STS);
261 writel(val | mask, acdev->vbase + IRQ_EN);
263 writel(val & ~mask, acdev->vbase + IRQ_EN);
266 static inline void cf_card_reset(struct arasan_cf_dev *acdev)
268 u32 val = readl(acdev->vbase + OP_MODE);
270 writel(val | CARD_RESET, acdev->vbase + OP_MODE);
272 writel(val & ~CARD_RESET, acdev->vbase + OP_MODE);
275 static inline void cf_ctrl_reset(struct arasan_cf_dev *acdev)
277 writel(readl(acdev->vbase + OP_MODE) & ~CFHOST_ENB,
278 acdev->vbase + OP_MODE);
279 writel(readl(acdev->vbase + OP_MODE) | CFHOST_ENB,
280 acdev->vbase + OP_MODE);
283 static void cf_card_detect(struct arasan_cf_dev *acdev, bool hotplugged)
285 struct ata_port *ap = acdev->host->ports[0];
286 struct ata_eh_info *ehi = &ap->link.eh_info;
287 u32 val = readl(acdev->vbase + CFI_STS);
289 /* Both CD1 & CD2 should be low if card inserted completely */
290 if (!(val & (CARD_DETECT1 | CARD_DETECT2))) {
291 if (acdev->card_present)
293 acdev->card_present = 1;
294 cf_card_reset(acdev);
296 if (!acdev->card_present)
298 acdev->card_present = 0;
302 ata_ehi_hotplugged(ehi);
307 static int cf_init(struct arasan_cf_dev *acdev)
309 struct arasan_cf_pdata *pdata = dev_get_platdata(acdev->host->dev);
313 ret = clk_enable(acdev->clk);
315 dev_dbg(acdev->host->dev, "clock enable failed");
319 spin_lock_irqsave(&acdev->host->lock, flags);
320 /* configure CF interface clock */
321 writel((pdata->cf_if_clk <= CF_IF_CLK_200M) ? pdata->cf_if_clk :
322 CF_IF_CLK_166M, acdev->vbase + CLK_CFG);
324 writel(TRUE_IDE_MODE | CFHOST_ENB, acdev->vbase + OP_MODE);
325 cf_interrupt_enable(acdev, CARD_DETECT_IRQ, 1);
326 cf_ginterrupt_enable(acdev, 1);
327 spin_unlock_irqrestore(&acdev->host->lock, flags);
332 static void cf_exit(struct arasan_cf_dev *acdev)
336 spin_lock_irqsave(&acdev->host->lock, flags);
337 cf_ginterrupt_enable(acdev, 0);
338 cf_interrupt_enable(acdev, TRUE_IDE_IRQS, 0);
339 cf_card_reset(acdev);
340 writel(readl(acdev->vbase + OP_MODE) & ~CFHOST_ENB,
341 acdev->vbase + OP_MODE);
342 spin_unlock_irqrestore(&acdev->host->lock, flags);
343 clk_disable(acdev->clk);
346 static void dma_callback(void *dev)
348 struct arasan_cf_dev *acdev = (struct arasan_cf_dev *) dev;
350 complete(&acdev->dma_completion);
353 static bool filter(struct dma_chan *chan, void *slave)
355 chan->private = slave;
359 static inline void dma_complete(struct arasan_cf_dev *acdev)
361 struct ata_queued_cmd *qc = acdev->qc;
365 ata_sff_interrupt(acdev->irq, acdev->host);
367 spin_lock_irqsave(&acdev->host->lock, flags);
368 if (unlikely(qc->err_mask) && ata_is_dma(qc->tf.protocol))
369 ata_ehi_push_desc(&qc->ap->link.eh_info, "DMA Failed: Timeout");
370 spin_unlock_irqrestore(&acdev->host->lock, flags);
373 static inline int wait4buf(struct arasan_cf_dev *acdev)
375 if (!wait_for_completion_timeout(&acdev->cf_completion, TIMEOUT)) {
376 u32 rw = acdev->qc->tf.flags & ATA_TFLAG_WRITE;
378 dev_err(acdev->host->dev, "%s TimeOut", rw ? "write" : "read");
382 /* Check if PIO Error interrupt has occurred */
383 if (acdev->dma_status & ATA_DMA_ERR)
390 dma_xfer(struct arasan_cf_dev *acdev, dma_addr_t src, dma_addr_t dest, u32 len)
392 struct dma_async_tx_descriptor *tx;
393 struct dma_chan *chan = acdev->dma_chan;
395 unsigned long flags = DMA_PREP_INTERRUPT | DMA_COMPL_SKIP_SRC_UNMAP |
396 DMA_COMPL_SKIP_DEST_UNMAP;
399 tx = chan->device->device_prep_dma_memcpy(chan, dest, src, len, flags);
401 dev_err(acdev->host->dev, "device_prep_dma_memcpy failed\n");
405 tx->callback = dma_callback;
406 tx->callback_param = acdev;
407 cookie = tx->tx_submit(tx);
409 ret = dma_submit_error(cookie);
411 dev_err(acdev->host->dev, "dma_submit_error\n");
415 chan->device->device_issue_pending(chan);
417 /* Wait for DMA to complete */
418 if (!wait_for_completion_timeout(&acdev->dma_completion, TIMEOUT)) {
419 chan->device->device_control(chan, DMA_TERMINATE_ALL, 0);
420 dev_err(acdev->host->dev, "wait_for_completion_timeout\n");
427 static int sg_xfer(struct arasan_cf_dev *acdev, struct scatterlist *sg)
429 dma_addr_t dest = 0, src = 0;
430 u32 xfer_cnt, sglen, dma_len, xfer_ctr;
431 u32 write = acdev->qc->tf.flags & ATA_TFLAG_WRITE;
435 sglen = sg_dma_len(sg);
437 src = sg_dma_address(sg);
438 dest = acdev->pbase + EXT_WRITE_PORT;
440 dest = sg_dma_address(sg);
441 src = acdev->pbase + EXT_READ_PORT;
446 * MAX_XFER_COUNT data will be transferred before we get transfer
447 * complete interrupt. Between after FIFO_SIZE data
448 * buffer available interrupt will be generated. At this time we will
449 * fill FIFO again: max FIFO_SIZE data.
452 xfer_cnt = min(sglen, MAX_XFER_COUNT);
453 spin_lock_irqsave(&acdev->host->lock, flags);
454 xfer_ctr = readl(acdev->vbase + XFER_CTR) &
456 writel(xfer_ctr | xfer_cnt | XFER_START,
457 acdev->vbase + XFER_CTR);
458 spin_unlock_irqrestore(&acdev->host->lock, flags);
460 /* continue dma xfers until current sg is completed */
462 /* wait for read to complete */
464 ret = wait4buf(acdev);
469 /* read/write FIFO in chunk of FIFO_SIZE */
470 dma_len = min(xfer_cnt, FIFO_SIZE);
471 ret = dma_xfer(acdev, src, dest, dma_len);
473 dev_err(acdev->host->dev, "dma failed");
485 /* wait for write to complete */
487 ret = wait4buf(acdev);
495 spin_lock_irqsave(&acdev->host->lock, flags);
496 writel(readl(acdev->vbase + XFER_CTR) & ~XFER_START,
497 acdev->vbase + XFER_CTR);
498 spin_unlock_irqrestore(&acdev->host->lock, flags);
504 * This routine uses External DMA controller to read/write data to FIFO of CF
505 * controller. There are two xfer related interrupt supported by CF controller:
506 * - buf_avail: This interrupt is generated as soon as we have buffer of 512
507 * bytes available for reading or empty buffer available for writing.
508 * - xfer_done: This interrupt is generated on transfer of "xfer_size" amount of
509 * data to/from FIFO. xfer_size is programmed in XFER_CTR register.
511 * Max buffer size = FIFO_SIZE = 512 Bytes.
512 * Max xfer_size = MAX_XFER_COUNT = 256 KB.
514 static void data_xfer(struct work_struct *work)
516 struct arasan_cf_dev *acdev = container_of(work, struct arasan_cf_dev,
518 struct ata_queued_cmd *qc = acdev->qc;
519 struct scatterlist *sg;
524 /* request dma channels */
525 /* dma_request_channel may sleep, so calling from process context */
526 acdev->dma_chan = dma_request_channel(acdev->mask, filter,
528 if (!acdev->dma_chan) {
529 dev_err(acdev->host->dev, "Unable to get dma_chan\n");
530 goto chan_request_fail;
533 for_each_sg(qc->sg, sg, qc->n_elem, temp) {
534 ret = sg_xfer(acdev, sg);
539 dma_release_channel(acdev->dma_chan);
541 /* data xferred successfully */
545 spin_lock_irqsave(&acdev->host->lock, flags);
546 status = ioread8(qc->ap->ioaddr.altstatus_addr);
547 spin_unlock_irqrestore(&acdev->host->lock, flags);
548 if (status & (ATA_BUSY | ATA_DRQ)) {
549 ata_sff_queue_delayed_work(&acdev->dwork, 1);
559 spin_lock_irqsave(&acdev->host->lock, flags);
560 /* error when transferring data to/from memory */
561 qc->err_mask |= AC_ERR_HOST_BUS;
562 qc->ap->hsm_task_state = HSM_ST_ERR;
564 cf_ctrl_reset(acdev);
565 spin_unlock_irqrestore(qc->ap->lock, flags);
570 static void delayed_finish(struct work_struct *work)
572 struct arasan_cf_dev *acdev = container_of(work, struct arasan_cf_dev,
574 struct ata_queued_cmd *qc = acdev->qc;
578 spin_lock_irqsave(&acdev->host->lock, flags);
579 status = ioread8(qc->ap->ioaddr.altstatus_addr);
580 spin_unlock_irqrestore(&acdev->host->lock, flags);
582 if (status & (ATA_BUSY | ATA_DRQ))
583 ata_sff_queue_delayed_work(&acdev->dwork, 1);
588 static irqreturn_t arasan_cf_interrupt(int irq, void *dev)
590 struct arasan_cf_dev *acdev = ((struct ata_host *)dev)->private_data;
594 irqsts = readl(acdev->vbase + GIRQ_STS);
595 if (!(irqsts & GIRQ_CF))
598 spin_lock_irqsave(&acdev->host->lock, flags);
599 irqsts = readl(acdev->vbase + IRQ_STS);
600 writel(irqsts, acdev->vbase + IRQ_STS); /* clear irqs */
601 writel(GIRQ_CF, acdev->vbase + GIRQ_STS); /* clear girqs */
603 /* handle only relevant interrupts */
604 irqsts &= ~IGNORED_IRQS;
606 if (irqsts & CARD_DETECT_IRQ) {
607 cf_card_detect(acdev, 1);
608 spin_unlock_irqrestore(&acdev->host->lock, flags);
612 if (irqsts & PIO_XFER_ERR_IRQ) {
613 acdev->dma_status = ATA_DMA_ERR;
614 writel(readl(acdev->vbase + XFER_CTR) & ~XFER_START,
615 acdev->vbase + XFER_CTR);
616 spin_unlock_irqrestore(&acdev->host->lock, flags);
617 complete(&acdev->cf_completion);
618 dev_err(acdev->host->dev, "pio xfer err irq\n");
622 spin_unlock_irqrestore(&acdev->host->lock, flags);
624 if (irqsts & BUF_AVAIL_IRQ) {
625 complete(&acdev->cf_completion);
629 if (irqsts & XFER_DONE_IRQ) {
630 struct ata_queued_cmd *qc = acdev->qc;
632 /* Send Complete only for write */
633 if (qc->tf.flags & ATA_TFLAG_WRITE)
634 complete(&acdev->cf_completion);
640 static void arasan_cf_freeze(struct ata_port *ap)
642 struct arasan_cf_dev *acdev = ap->host->private_data;
644 /* stop transfer and reset controller */
645 writel(readl(acdev->vbase + XFER_CTR) & ~XFER_START,
646 acdev->vbase + XFER_CTR);
647 cf_ctrl_reset(acdev);
648 acdev->dma_status = ATA_DMA_ERR;
650 ata_sff_dma_pause(ap);
654 void arasan_cf_error_handler(struct ata_port *ap)
656 struct arasan_cf_dev *acdev = ap->host->private_data;
659 * DMA transfers using an external DMA controller may be scheduled.
660 * Abort them before handling error. Refer data_xfer() for further
663 cancel_work_sync(&acdev->work);
664 cancel_delayed_work_sync(&acdev->dwork);
665 return ata_sff_error_handler(ap);
668 static void arasan_cf_dma_start(struct arasan_cf_dev *acdev)
670 u32 xfer_ctr = readl(acdev->vbase + XFER_CTR) & ~XFER_DIR_MASK;
671 u32 write = acdev->qc->tf.flags & ATA_TFLAG_WRITE;
673 xfer_ctr |= write ? XFER_WRITE : XFER_READ;
674 writel(xfer_ctr, acdev->vbase + XFER_CTR);
676 acdev->qc->ap->ops->sff_exec_command(acdev->qc->ap, &acdev->qc->tf);
677 ata_sff_queue_work(&acdev->work);
680 unsigned int arasan_cf_qc_issue(struct ata_queued_cmd *qc)
682 struct ata_port *ap = qc->ap;
683 struct arasan_cf_dev *acdev = ap->host->private_data;
685 /* defer PIO handling to sff_qc_issue */
686 if (!ata_is_dma(qc->tf.protocol))
687 return ata_sff_qc_issue(qc);
689 /* select the device */
691 ata_sff_dev_select(ap, qc->dev->devno);
694 /* start the command */
695 switch (qc->tf.protocol) {
697 WARN_ON_ONCE(qc->tf.flags & ATA_TFLAG_POLLING);
699 ap->ops->sff_tf_load(ap, &qc->tf);
700 acdev->dma_status = 0;
702 arasan_cf_dma_start(acdev);
703 ap->hsm_task_state = HSM_ST_LAST;
708 return AC_ERR_SYSTEM;
714 static void arasan_cf_set_piomode(struct ata_port *ap, struct ata_device *adev)
716 struct arasan_cf_dev *acdev = ap->host->private_data;
717 u8 pio = adev->pio_mode - XFER_PIO_0;
721 /* Arasan ctrl supports Mode0 -> Mode6 */
723 dev_err(ap->dev, "Unknown PIO mode\n");
727 spin_lock_irqsave(&acdev->host->lock, flags);
728 val = readl(acdev->vbase + OP_MODE) &
729 ~(ULTRA_DMA_ENB | MULTI_WORD_DMA_ENB | DRQ_BLOCK_SIZE_MASK);
730 writel(val, acdev->vbase + OP_MODE);
731 val = readl(acdev->vbase + TM_CFG) & ~TRUEIDE_PIO_TIMING_MASK;
732 val |= pio << TRUEIDE_PIO_TIMING_SHIFT;
733 writel(val, acdev->vbase + TM_CFG);
735 cf_interrupt_enable(acdev, BUF_AVAIL_IRQ | XFER_DONE_IRQ, 0);
736 cf_interrupt_enable(acdev, PIO_XFER_ERR_IRQ, 1);
737 spin_unlock_irqrestore(&acdev->host->lock, flags);
740 static void arasan_cf_set_dmamode(struct ata_port *ap, struct ata_device *adev)
742 struct arasan_cf_dev *acdev = ap->host->private_data;
743 u32 opmode, tmcfg, dma_mode = adev->dma_mode;
746 spin_lock_irqsave(&acdev->host->lock, flags);
747 opmode = readl(acdev->vbase + OP_MODE) &
748 ~(MULTI_WORD_DMA_ENB | ULTRA_DMA_ENB);
749 tmcfg = readl(acdev->vbase + TM_CFG);
751 if ((dma_mode >= XFER_UDMA_0) && (dma_mode <= XFER_UDMA_6)) {
752 opmode |= ULTRA_DMA_ENB;
753 tmcfg &= ~ULTRA_DMA_TIMING_MASK;
754 tmcfg |= (dma_mode - XFER_UDMA_0) << ULTRA_DMA_TIMING_SHIFT;
755 } else if ((dma_mode >= XFER_MW_DMA_0) && (dma_mode <= XFER_MW_DMA_4)) {
756 opmode |= MULTI_WORD_DMA_ENB;
757 tmcfg &= ~TRUEIDE_MWORD_DMA_TIMING_MASK;
758 tmcfg |= (dma_mode - XFER_MW_DMA_0) <<
759 TRUEIDE_MWORD_DMA_TIMING_SHIFT;
761 dev_err(ap->dev, "Unknown DMA mode\n");
762 spin_unlock_irqrestore(&acdev->host->lock, flags);
766 writel(opmode, acdev->vbase + OP_MODE);
767 writel(tmcfg, acdev->vbase + TM_CFG);
768 writel(DMA_XFER_MODE, acdev->vbase + XFER_CTR);
770 cf_interrupt_enable(acdev, PIO_XFER_ERR_IRQ, 0);
771 cf_interrupt_enable(acdev, BUF_AVAIL_IRQ | XFER_DONE_IRQ, 1);
772 spin_unlock_irqrestore(&acdev->host->lock, flags);
775 static struct ata_port_operations arasan_cf_ops = {
776 .inherits = &ata_sff_port_ops,
777 .freeze = arasan_cf_freeze,
778 .error_handler = arasan_cf_error_handler,
779 .qc_issue = arasan_cf_qc_issue,
780 .set_piomode = arasan_cf_set_piomode,
781 .set_dmamode = arasan_cf_set_dmamode,
784 static int __devinit arasan_cf_probe(struct platform_device *pdev)
786 struct arasan_cf_dev *acdev;
787 struct arasan_cf_pdata *pdata = dev_get_platdata(&pdev->dev);
788 struct ata_host *host;
790 struct resource *res;
791 irq_handler_t irq_handler = NULL;
794 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
798 if (!devm_request_mem_region(&pdev->dev, res->start, resource_size(res),
800 dev_warn(&pdev->dev, "Failed to get memory region resource\n");
804 acdev = devm_kzalloc(&pdev->dev, sizeof(*acdev), GFP_KERNEL);
806 dev_warn(&pdev->dev, "kzalloc fail\n");
810 /* if irq is 0, support only PIO */
811 acdev->irq = platform_get_irq(pdev, 0);
813 irq_handler = arasan_cf_interrupt;
815 pdata->quirk |= CF_BROKEN_MWDMA | CF_BROKEN_UDMA;
817 acdev->pbase = res->start;
818 acdev->vbase = devm_ioremap_nocache(&pdev->dev, res->start,
821 dev_warn(&pdev->dev, "ioremap fail\n");
825 acdev->clk = clk_get(&pdev->dev, NULL);
826 if (IS_ERR(acdev->clk)) {
827 dev_warn(&pdev->dev, "Clock not found\n");
828 return PTR_ERR(acdev->clk);
832 host = ata_host_alloc(&pdev->dev, 1);
835 dev_warn(&pdev->dev, "alloc host fail\n");
840 host->private_data = acdev;
842 ap->ops = &arasan_cf_ops;
843 ap->pio_mask = ATA_PIO6;
844 ap->mwdma_mask = ATA_MWDMA4;
845 ap->udma_mask = ATA_UDMA6;
847 init_completion(&acdev->cf_completion);
848 init_completion(&acdev->dma_completion);
849 INIT_WORK(&acdev->work, data_xfer);
850 INIT_DELAYED_WORK(&acdev->dwork, delayed_finish);
851 dma_cap_set(DMA_MEMCPY, acdev->mask);
852 acdev->dma_priv = pdata->dma_priv;
854 /* Handle platform specific quirks */
856 if (pdata->quirk & CF_BROKEN_PIO) {
857 ap->ops->set_piomode = NULL;
860 if (pdata->quirk & CF_BROKEN_MWDMA)
862 if (pdata->quirk & CF_BROKEN_UDMA)
865 ap->flags |= ATA_FLAG_PIO_POLLING | ATA_FLAG_NO_ATAPI;
867 ap->ioaddr.cmd_addr = acdev->vbase + ATA_DATA_PORT;
868 ap->ioaddr.data_addr = acdev->vbase + ATA_DATA_PORT;
869 ap->ioaddr.error_addr = acdev->vbase + ATA_ERR_FTR;
870 ap->ioaddr.feature_addr = acdev->vbase + ATA_ERR_FTR;
871 ap->ioaddr.nsect_addr = acdev->vbase + ATA_SC;
872 ap->ioaddr.lbal_addr = acdev->vbase + ATA_SN;
873 ap->ioaddr.lbam_addr = acdev->vbase + ATA_CL;
874 ap->ioaddr.lbah_addr = acdev->vbase + ATA_CH;
875 ap->ioaddr.device_addr = acdev->vbase + ATA_SH;
876 ap->ioaddr.status_addr = acdev->vbase + ATA_STS_CMD;
877 ap->ioaddr.command_addr = acdev->vbase + ATA_STS_CMD;
878 ap->ioaddr.altstatus_addr = acdev->vbase + ATA_ASTS_DCTR;
879 ap->ioaddr.ctl_addr = acdev->vbase + ATA_ASTS_DCTR;
881 ata_port_desc(ap, "phy_addr %llx virt_addr %p",
882 (unsigned long long) res->start, acdev->vbase);
884 ret = cf_init(acdev);
888 cf_card_detect(acdev, 0);
890 return ata_host_activate(host, acdev->irq, irq_handler, 0,
898 static int __devexit arasan_cf_remove(struct platform_device *pdev)
900 struct ata_host *host = dev_get_drvdata(&pdev->dev);
901 struct arasan_cf_dev *acdev = host->ports[0]->private_data;
903 ata_host_detach(host);
911 static int arasan_cf_suspend(struct device *dev)
913 struct ata_host *host = dev_get_drvdata(dev);
914 struct arasan_cf_dev *acdev = host->ports[0]->private_data;
917 acdev->dma_chan->device->device_control(acdev->dma_chan,
918 DMA_TERMINATE_ALL, 0);
921 return ata_host_suspend(host, PMSG_SUSPEND);
924 static int arasan_cf_resume(struct device *dev)
926 struct ata_host *host = dev_get_drvdata(dev);
927 struct arasan_cf_dev *acdev = host->ports[0]->private_data;
930 ata_host_resume(host);
936 static SIMPLE_DEV_PM_OPS(arasan_cf_pm_ops, arasan_cf_suspend, arasan_cf_resume);
938 static struct platform_driver arasan_cf_driver = {
939 .probe = arasan_cf_probe,
940 .remove = __devexit_p(arasan_cf_remove),
943 .owner = THIS_MODULE,
944 .pm = &arasan_cf_pm_ops,
948 module_platform_driver(arasan_cf_driver);
950 MODULE_AUTHOR("Viresh Kumar <viresh.linux@gmail.com>");
951 MODULE_DESCRIPTION("Arasan ATA Compact Flash driver");
952 MODULE_LICENSE("GPL");
953 MODULE_ALIAS("platform:" DRIVER_NAME);