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1 | /* | |
2 | * drivers/ata/sata_dwc_460ex.c | |
3 | * | |
4 | * Synopsys DesignWare Cores (DWC) SATA host driver | |
5 | * | |
6 | * Author: Mark Miesfeld <mmiesfeld@amcc.com> | |
7 | * | |
8 | * Ported from 2.6.19.2 to 2.6.25/26 by Stefan Roese <sr@denx.de> | |
9 | * Copyright 2008 DENX Software Engineering | |
10 | * | |
11 | * Based on versions provided by AMCC and Synopsys which are: | |
12 | * Copyright 2006 Applied Micro Circuits Corporation | |
13 | * COPYRIGHT (C) 2005 SYNOPSYS, INC. ALL RIGHTS RESERVED | |
14 | * | |
15 | * This program is free software; you can redistribute it and/or modify it | |
16 | * under the terms of the GNU General Public License as published by the | |
17 | * Free Software Foundation; either version 2 of the License, or (at your | |
18 | * option) any later version. | |
19 | */ | |
20 | ||
21 | #ifdef CONFIG_SATA_DWC_DEBUG | |
22 | #define DEBUG | |
23 | #endif | |
24 | ||
25 | #ifdef CONFIG_SATA_DWC_VDEBUG | |
26 | #define VERBOSE_DEBUG | |
27 | #define DEBUG_NCQ | |
28 | #endif | |
29 | ||
30 | #include <linux/kernel.h> | |
31 | #include <linux/module.h> | |
32 | #include <linux/device.h> | |
33 | #include <linux/dmaengine.h> | |
34 | #include <linux/of_address.h> | |
35 | #include <linux/of_irq.h> | |
36 | #include <linux/of_platform.h> | |
37 | #include <linux/platform_device.h> | |
38 | #include <linux/phy/phy.h> | |
39 | #include <linux/libata.h> | |
40 | #include <linux/slab.h> | |
41 | ||
42 | #include "libata.h" | |
43 | ||
44 | #include <scsi/scsi_host.h> | |
45 | #include <scsi/scsi_cmnd.h> | |
46 | ||
47 | /* These two are defined in "libata.h" */ | |
48 | #undef DRV_NAME | |
49 | #undef DRV_VERSION | |
50 | ||
51 | #define DRV_NAME "sata-dwc" | |
52 | #define DRV_VERSION "1.3" | |
53 | ||
54 | #define sata_dwc_writel(a, v) writel_relaxed(v, a) | |
55 | #define sata_dwc_readl(a) readl_relaxed(a) | |
56 | ||
57 | #ifndef NO_IRQ | |
58 | #define NO_IRQ 0 | |
59 | #endif | |
60 | ||
61 | #define AHB_DMA_BRST_DFLT 64 /* 16 data items burst length */ | |
62 | ||
63 | enum { | |
64 | SATA_DWC_MAX_PORTS = 1, | |
65 | ||
66 | SATA_DWC_SCR_OFFSET = 0x24, | |
67 | SATA_DWC_REG_OFFSET = 0x64, | |
68 | }; | |
69 | ||
70 | /* DWC SATA Registers */ | |
71 | struct sata_dwc_regs { | |
72 | u32 fptagr; /* 1st party DMA tag */ | |
73 | u32 fpbor; /* 1st party DMA buffer offset */ | |
74 | u32 fptcr; /* 1st party DMA Xfr count */ | |
75 | u32 dmacr; /* DMA Control */ | |
76 | u32 dbtsr; /* DMA Burst Transac size */ | |
77 | u32 intpr; /* Interrupt Pending */ | |
78 | u32 intmr; /* Interrupt Mask */ | |
79 | u32 errmr; /* Error Mask */ | |
80 | u32 llcr; /* Link Layer Control */ | |
81 | u32 phycr; /* PHY Control */ | |
82 | u32 physr; /* PHY Status */ | |
83 | u32 rxbistpd; /* Recvd BIST pattern def register */ | |
84 | u32 rxbistpd1; /* Recvd BIST data dword1 */ | |
85 | u32 rxbistpd2; /* Recvd BIST pattern data dword2 */ | |
86 | u32 txbistpd; /* Trans BIST pattern def register */ | |
87 | u32 txbistpd1; /* Trans BIST data dword1 */ | |
88 | u32 txbistpd2; /* Trans BIST data dword2 */ | |
89 | u32 bistcr; /* BIST Control Register */ | |
90 | u32 bistfctr; /* BIST FIS Count Register */ | |
91 | u32 bistsr; /* BIST Status Register */ | |
92 | u32 bistdecr; /* BIST Dword Error count register */ | |
93 | u32 res[15]; /* Reserved locations */ | |
94 | u32 testr; /* Test Register */ | |
95 | u32 versionr; /* Version Register */ | |
96 | u32 idr; /* ID Register */ | |
97 | u32 unimpl[192]; /* Unimplemented */ | |
98 | u32 dmadr[256]; /* FIFO Locations in DMA Mode */ | |
99 | }; | |
100 | ||
101 | enum { | |
102 | SCR_SCONTROL_DET_ENABLE = 0x00000001, | |
103 | SCR_SSTATUS_DET_PRESENT = 0x00000001, | |
104 | SCR_SERROR_DIAG_X = 0x04000000, | |
105 | /* DWC SATA Register Operations */ | |
106 | SATA_DWC_TXFIFO_DEPTH = 0x01FF, | |
107 | SATA_DWC_RXFIFO_DEPTH = 0x01FF, | |
108 | SATA_DWC_DMACR_TMOD_TXCHEN = 0x00000004, | |
109 | SATA_DWC_DMACR_TXCHEN = (0x00000001 | SATA_DWC_DMACR_TMOD_TXCHEN), | |
110 | SATA_DWC_DMACR_RXCHEN = (0x00000002 | SATA_DWC_DMACR_TMOD_TXCHEN), | |
111 | SATA_DWC_DMACR_TXRXCH_CLEAR = SATA_DWC_DMACR_TMOD_TXCHEN, | |
112 | SATA_DWC_INTPR_DMAT = 0x00000001, | |
113 | SATA_DWC_INTPR_NEWFP = 0x00000002, | |
114 | SATA_DWC_INTPR_PMABRT = 0x00000004, | |
115 | SATA_DWC_INTPR_ERR = 0x00000008, | |
116 | SATA_DWC_INTPR_NEWBIST = 0x00000010, | |
117 | SATA_DWC_INTPR_IPF = 0x10000000, | |
118 | SATA_DWC_INTMR_DMATM = 0x00000001, | |
119 | SATA_DWC_INTMR_NEWFPM = 0x00000002, | |
120 | SATA_DWC_INTMR_PMABRTM = 0x00000004, | |
121 | SATA_DWC_INTMR_ERRM = 0x00000008, | |
122 | SATA_DWC_INTMR_NEWBISTM = 0x00000010, | |
123 | SATA_DWC_LLCR_SCRAMEN = 0x00000001, | |
124 | SATA_DWC_LLCR_DESCRAMEN = 0x00000002, | |
125 | SATA_DWC_LLCR_RPDEN = 0x00000004, | |
126 | /* This is all error bits, zero's are reserved fields. */ | |
127 | SATA_DWC_SERROR_ERR_BITS = 0x0FFF0F03 | |
128 | }; | |
129 | ||
130 | #define SATA_DWC_SCR0_SPD_GET(v) (((v) >> 4) & 0x0000000F) | |
131 | #define SATA_DWC_DMACR_TX_CLEAR(v) (((v) & ~SATA_DWC_DMACR_TXCHEN) |\ | |
132 | SATA_DWC_DMACR_TMOD_TXCHEN) | |
133 | #define SATA_DWC_DMACR_RX_CLEAR(v) (((v) & ~SATA_DWC_DMACR_RXCHEN) |\ | |
134 | SATA_DWC_DMACR_TMOD_TXCHEN) | |
135 | #define SATA_DWC_DBTSR_MWR(size) (((size)/4) & SATA_DWC_TXFIFO_DEPTH) | |
136 | #define SATA_DWC_DBTSR_MRD(size) ((((size)/4) & SATA_DWC_RXFIFO_DEPTH)\ | |
137 | << 16) | |
138 | struct sata_dwc_device { | |
139 | struct device *dev; /* generic device struct */ | |
140 | struct ata_probe_ent *pe; /* ptr to probe-ent */ | |
141 | struct ata_host *host; | |
142 | struct sata_dwc_regs __iomem *sata_dwc_regs; /* DW SATA specific */ | |
143 | u32 sactive_issued; | |
144 | u32 sactive_queued; | |
145 | struct phy *phy; | |
146 | phys_addr_t dmadr; | |
147 | #ifdef CONFIG_SATA_DWC_OLD_DMA | |
148 | struct dw_dma_chip *dma; | |
149 | #endif | |
150 | }; | |
151 | ||
152 | #define SATA_DWC_QCMD_MAX 32 | |
153 | ||
154 | struct sata_dwc_device_port { | |
155 | struct sata_dwc_device *hsdev; | |
156 | int cmd_issued[SATA_DWC_QCMD_MAX]; | |
157 | int dma_pending[SATA_DWC_QCMD_MAX]; | |
158 | ||
159 | /* DMA info */ | |
160 | struct dma_chan *chan; | |
161 | struct dma_async_tx_descriptor *desc[SATA_DWC_QCMD_MAX]; | |
162 | u32 dma_interrupt_count; | |
163 | }; | |
164 | ||
165 | /* | |
166 | * Commonly used DWC SATA driver macros | |
167 | */ | |
168 | #define HSDEV_FROM_HOST(host) ((struct sata_dwc_device *)(host)->private_data) | |
169 | #define HSDEV_FROM_AP(ap) ((struct sata_dwc_device *)(ap)->host->private_data) | |
170 | #define HSDEVP_FROM_AP(ap) ((struct sata_dwc_device_port *)(ap)->private_data) | |
171 | #define HSDEV_FROM_QC(qc) ((struct sata_dwc_device *)(qc)->ap->host->private_data) | |
172 | #define HSDEV_FROM_HSDEVP(p) ((struct sata_dwc_device *)(p)->hsdev) | |
173 | ||
174 | enum { | |
175 | SATA_DWC_CMD_ISSUED_NOT = 0, | |
176 | SATA_DWC_CMD_ISSUED_PEND = 1, | |
177 | SATA_DWC_CMD_ISSUED_EXEC = 2, | |
178 | SATA_DWC_CMD_ISSUED_NODATA = 3, | |
179 | ||
180 | SATA_DWC_DMA_PENDING_NONE = 0, | |
181 | SATA_DWC_DMA_PENDING_TX = 1, | |
182 | SATA_DWC_DMA_PENDING_RX = 2, | |
183 | }; | |
184 | ||
185 | /* | |
186 | * Prototypes | |
187 | */ | |
188 | static void sata_dwc_bmdma_start_by_tag(struct ata_queued_cmd *qc, u8 tag); | |
189 | static int sata_dwc_qc_complete(struct ata_port *ap, struct ata_queued_cmd *qc, | |
190 | u32 check_status); | |
191 | static void sata_dwc_dma_xfer_complete(struct ata_port *ap, u32 check_status); | |
192 | static void sata_dwc_port_stop(struct ata_port *ap); | |
193 | static void sata_dwc_clear_dmacr(struct sata_dwc_device_port *hsdevp, u8 tag); | |
194 | ||
195 | #ifdef CONFIG_SATA_DWC_OLD_DMA | |
196 | ||
197 | #include <linux/platform_data/dma-dw.h> | |
198 | #include <linux/dma/dw.h> | |
199 | ||
200 | static struct dw_dma_slave sata_dwc_dma_dws = { | |
201 | .src_id = 0, | |
202 | .dst_id = 0, | |
203 | .m_master = 1, | |
204 | .p_master = 0, | |
205 | }; | |
206 | ||
207 | static bool sata_dwc_dma_filter(struct dma_chan *chan, void *param) | |
208 | { | |
209 | struct dw_dma_slave *dws = &sata_dwc_dma_dws; | |
210 | ||
211 | if (dws->dma_dev != chan->device->dev) | |
212 | return false; | |
213 | ||
214 | chan->private = dws; | |
215 | return true; | |
216 | } | |
217 | ||
218 | static int sata_dwc_dma_get_channel_old(struct sata_dwc_device_port *hsdevp) | |
219 | { | |
220 | struct sata_dwc_device *hsdev = hsdevp->hsdev; | |
221 | struct dw_dma_slave *dws = &sata_dwc_dma_dws; | |
222 | dma_cap_mask_t mask; | |
223 | ||
224 | dws->dma_dev = hsdev->dev; | |
225 | ||
226 | dma_cap_zero(mask); | |
227 | dma_cap_set(DMA_SLAVE, mask); | |
228 | ||
229 | /* Acquire DMA channel */ | |
230 | hsdevp->chan = dma_request_channel(mask, sata_dwc_dma_filter, hsdevp); | |
231 | if (!hsdevp->chan) { | |
232 | dev_err(hsdev->dev, "%s: dma channel unavailable\n", | |
233 | __func__); | |
234 | return -EAGAIN; | |
235 | } | |
236 | ||
237 | return 0; | |
238 | } | |
239 | ||
240 | static int sata_dwc_dma_init_old(struct platform_device *pdev, | |
241 | struct sata_dwc_device *hsdev) | |
242 | { | |
243 | struct device_node *np = pdev->dev.of_node; | |
244 | struct resource *res; | |
245 | ||
246 | hsdev->dma = devm_kzalloc(&pdev->dev, sizeof(*hsdev->dma), GFP_KERNEL); | |
247 | if (!hsdev->dma) | |
248 | return -ENOMEM; | |
249 | ||
250 | hsdev->dma->dev = &pdev->dev; | |
251 | ||
252 | /* Get SATA DMA interrupt number */ | |
253 | hsdev->dma->irq = irq_of_parse_and_map(np, 1); | |
254 | if (hsdev->dma->irq == NO_IRQ) { | |
255 | dev_err(&pdev->dev, "no SATA DMA irq\n"); | |
256 | return -ENODEV; | |
257 | } | |
258 | ||
259 | /* Get physical SATA DMA register base address */ | |
260 | res = platform_get_resource(pdev, IORESOURCE_MEM, 1); | |
261 | hsdev->dma->regs = devm_ioremap_resource(&pdev->dev, res); | |
262 | if (IS_ERR(hsdev->dma->regs)) { | |
263 | dev_err(&pdev->dev, | |
264 | "ioremap failed for AHBDMA register address\n"); | |
265 | return PTR_ERR(hsdev->dma->regs); | |
266 | } | |
267 | ||
268 | /* Initialize AHB DMAC */ | |
269 | return dw_dma_probe(hsdev->dma); | |
270 | } | |
271 | ||
272 | static void sata_dwc_dma_exit_old(struct sata_dwc_device *hsdev) | |
273 | { | |
274 | if (!hsdev->dma) | |
275 | return; | |
276 | ||
277 | dw_dma_remove(hsdev->dma); | |
278 | } | |
279 | ||
280 | #endif | |
281 | ||
282 | static const char *get_prot_descript(u8 protocol) | |
283 | { | |
284 | switch ((enum ata_tf_protocols)protocol) { | |
285 | case ATA_PROT_NODATA: | |
286 | return "ATA no data"; | |
287 | case ATA_PROT_PIO: | |
288 | return "ATA PIO"; | |
289 | case ATA_PROT_DMA: | |
290 | return "ATA DMA"; | |
291 | case ATA_PROT_NCQ: | |
292 | return "ATA NCQ"; | |
293 | case ATAPI_PROT_NODATA: | |
294 | return "ATAPI no data"; | |
295 | case ATAPI_PROT_PIO: | |
296 | return "ATAPI PIO"; | |
297 | case ATAPI_PROT_DMA: | |
298 | return "ATAPI DMA"; | |
299 | default: | |
300 | return "unknown"; | |
301 | } | |
302 | } | |
303 | ||
304 | static const char *get_dma_dir_descript(int dma_dir) | |
305 | { | |
306 | switch ((enum dma_data_direction)dma_dir) { | |
307 | case DMA_BIDIRECTIONAL: | |
308 | return "bidirectional"; | |
309 | case DMA_TO_DEVICE: | |
310 | return "to device"; | |
311 | case DMA_FROM_DEVICE: | |
312 | return "from device"; | |
313 | default: | |
314 | return "none"; | |
315 | } | |
316 | } | |
317 | ||
318 | static void sata_dwc_tf_dump(struct ata_port *ap, struct ata_taskfile *tf) | |
319 | { | |
320 | dev_vdbg(ap->dev, | |
321 | "taskfile cmd: 0x%02x protocol: %s flags: 0x%lx device: %x\n", | |
322 | tf->command, get_prot_descript(tf->protocol), tf->flags, | |
323 | tf->device); | |
324 | dev_vdbg(ap->dev, | |
325 | "feature: 0x%02x nsect: 0x%x lbal: 0x%x lbam: 0x%x lbah: 0x%x\n", | |
326 | tf->feature, tf->nsect, tf->lbal, tf->lbam, tf->lbah); | |
327 | dev_vdbg(ap->dev, | |
328 | "hob_feature: 0x%02x hob_nsect: 0x%x hob_lbal: 0x%x hob_lbam: 0x%x hob_lbah: 0x%x\n", | |
329 | tf->hob_feature, tf->hob_nsect, tf->hob_lbal, tf->hob_lbam, | |
330 | tf->hob_lbah); | |
331 | } | |
332 | ||
333 | static void dma_dwc_xfer_done(void *hsdev_instance) | |
334 | { | |
335 | unsigned long flags; | |
336 | struct sata_dwc_device *hsdev = hsdev_instance; | |
337 | struct ata_host *host = (struct ata_host *)hsdev->host; | |
338 | struct ata_port *ap; | |
339 | struct sata_dwc_device_port *hsdevp; | |
340 | u8 tag = 0; | |
341 | unsigned int port = 0; | |
342 | ||
343 | spin_lock_irqsave(&host->lock, flags); | |
344 | ap = host->ports[port]; | |
345 | hsdevp = HSDEVP_FROM_AP(ap); | |
346 | tag = ap->link.active_tag; | |
347 | ||
348 | /* | |
349 | * Each DMA command produces 2 interrupts. Only | |
350 | * complete the command after both interrupts have been | |
351 | * seen. (See sata_dwc_isr()) | |
352 | */ | |
353 | hsdevp->dma_interrupt_count++; | |
354 | sata_dwc_clear_dmacr(hsdevp, tag); | |
355 | ||
356 | if (hsdevp->dma_pending[tag] == SATA_DWC_DMA_PENDING_NONE) { | |
357 | dev_err(ap->dev, "DMA not pending tag=0x%02x pending=%d\n", | |
358 | tag, hsdevp->dma_pending[tag]); | |
359 | } | |
360 | ||
361 | if ((hsdevp->dma_interrupt_count % 2) == 0) | |
362 | sata_dwc_dma_xfer_complete(ap, 1); | |
363 | ||
364 | spin_unlock_irqrestore(&host->lock, flags); | |
365 | } | |
366 | ||
367 | static struct dma_async_tx_descriptor *dma_dwc_xfer_setup(struct ata_queued_cmd *qc) | |
368 | { | |
369 | struct ata_port *ap = qc->ap; | |
370 | struct sata_dwc_device_port *hsdevp = HSDEVP_FROM_AP(ap); | |
371 | struct sata_dwc_device *hsdev = HSDEV_FROM_AP(ap); | |
372 | struct dma_slave_config sconf; | |
373 | struct dma_async_tx_descriptor *desc; | |
374 | ||
375 | if (qc->dma_dir == DMA_DEV_TO_MEM) { | |
376 | sconf.src_addr = hsdev->dmadr; | |
377 | sconf.device_fc = false; | |
378 | } else { /* DMA_MEM_TO_DEV */ | |
379 | sconf.dst_addr = hsdev->dmadr; | |
380 | sconf.device_fc = false; | |
381 | } | |
382 | ||
383 | sconf.direction = qc->dma_dir; | |
384 | sconf.src_maxburst = AHB_DMA_BRST_DFLT / 4; /* in items */ | |
385 | sconf.dst_maxburst = AHB_DMA_BRST_DFLT / 4; /* in items */ | |
386 | sconf.src_addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES; | |
387 | sconf.dst_addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES; | |
388 | ||
389 | dmaengine_slave_config(hsdevp->chan, &sconf); | |
390 | ||
391 | /* Convert SG list to linked list of items (LLIs) for AHB DMA */ | |
392 | desc = dmaengine_prep_slave_sg(hsdevp->chan, qc->sg, qc->n_elem, | |
393 | qc->dma_dir, | |
394 | DMA_PREP_INTERRUPT | DMA_CTRL_ACK); | |
395 | ||
396 | if (!desc) | |
397 | return NULL; | |
398 | ||
399 | desc->callback = dma_dwc_xfer_done; | |
400 | desc->callback_param = hsdev; | |
401 | ||
402 | dev_dbg(hsdev->dev, "%s sg: 0x%p, count: %d addr: %pa\n", __func__, | |
403 | qc->sg, qc->n_elem, &hsdev->dmadr); | |
404 | ||
405 | return desc; | |
406 | } | |
407 | ||
408 | static int sata_dwc_scr_read(struct ata_link *link, unsigned int scr, u32 *val) | |
409 | { | |
410 | if (scr > SCR_NOTIFICATION) { | |
411 | dev_err(link->ap->dev, "%s: Incorrect SCR offset 0x%02x\n", | |
412 | __func__, scr); | |
413 | return -EINVAL; | |
414 | } | |
415 | ||
416 | *val = sata_dwc_readl(link->ap->ioaddr.scr_addr + (scr * 4)); | |
417 | dev_dbg(link->ap->dev, "%s: id=%d reg=%d val=0x%08x\n", __func__, | |
418 | link->ap->print_id, scr, *val); | |
419 | ||
420 | return 0; | |
421 | } | |
422 | ||
423 | static int sata_dwc_scr_write(struct ata_link *link, unsigned int scr, u32 val) | |
424 | { | |
425 | dev_dbg(link->ap->dev, "%s: id=%d reg=%d val=0x%08x\n", __func__, | |
426 | link->ap->print_id, scr, val); | |
427 | if (scr > SCR_NOTIFICATION) { | |
428 | dev_err(link->ap->dev, "%s: Incorrect SCR offset 0x%02x\n", | |
429 | __func__, scr); | |
430 | return -EINVAL; | |
431 | } | |
432 | sata_dwc_writel(link->ap->ioaddr.scr_addr + (scr * 4), val); | |
433 | ||
434 | return 0; | |
435 | } | |
436 | ||
437 | static void clear_serror(struct ata_port *ap) | |
438 | { | |
439 | u32 val; | |
440 | sata_dwc_scr_read(&ap->link, SCR_ERROR, &val); | |
441 | sata_dwc_scr_write(&ap->link, SCR_ERROR, val); | |
442 | } | |
443 | ||
444 | static void clear_interrupt_bit(struct sata_dwc_device *hsdev, u32 bit) | |
445 | { | |
446 | sata_dwc_writel(&hsdev->sata_dwc_regs->intpr, | |
447 | sata_dwc_readl(&hsdev->sata_dwc_regs->intpr)); | |
448 | } | |
449 | ||
450 | static u32 qcmd_tag_to_mask(u8 tag) | |
451 | { | |
452 | return 0x00000001 << (tag & 0x1f); | |
453 | } | |
454 | ||
455 | /* See ahci.c */ | |
456 | static void sata_dwc_error_intr(struct ata_port *ap, | |
457 | struct sata_dwc_device *hsdev, uint intpr) | |
458 | { | |
459 | struct sata_dwc_device_port *hsdevp = HSDEVP_FROM_AP(ap); | |
460 | struct ata_eh_info *ehi = &ap->link.eh_info; | |
461 | unsigned int err_mask = 0, action = 0; | |
462 | struct ata_queued_cmd *qc; | |
463 | u32 serror; | |
464 | u8 status, tag; | |
465 | ||
466 | ata_ehi_clear_desc(ehi); | |
467 | ||
468 | sata_dwc_scr_read(&ap->link, SCR_ERROR, &serror); | |
469 | status = ap->ops->sff_check_status(ap); | |
470 | ||
471 | tag = ap->link.active_tag; | |
472 | ||
473 | dev_err(ap->dev, | |
474 | "%s SCR_ERROR=0x%08x intpr=0x%08x status=0x%08x dma_intp=%d pending=%d issued=%d", | |
475 | __func__, serror, intpr, status, hsdevp->dma_interrupt_count, | |
476 | hsdevp->dma_pending[tag], hsdevp->cmd_issued[tag]); | |
477 | ||
478 | /* Clear error register and interrupt bit */ | |
479 | clear_serror(ap); | |
480 | clear_interrupt_bit(hsdev, SATA_DWC_INTPR_ERR); | |
481 | ||
482 | /* This is the only error happening now. TODO check for exact error */ | |
483 | ||
484 | err_mask |= AC_ERR_HOST_BUS; | |
485 | action |= ATA_EH_RESET; | |
486 | ||
487 | /* Pass this on to EH */ | |
488 | ehi->serror |= serror; | |
489 | ehi->action |= action; | |
490 | ||
491 | qc = ata_qc_from_tag(ap, tag); | |
492 | if (qc) | |
493 | qc->err_mask |= err_mask; | |
494 | else | |
495 | ehi->err_mask |= err_mask; | |
496 | ||
497 | ata_port_abort(ap); | |
498 | } | |
499 | ||
500 | /* | |
501 | * Function : sata_dwc_isr | |
502 | * arguments : irq, void *dev_instance, struct pt_regs *regs | |
503 | * Return value : irqreturn_t - status of IRQ | |
504 | * This Interrupt handler called via port ops registered function. | |
505 | * .irq_handler = sata_dwc_isr | |
506 | */ | |
507 | static irqreturn_t sata_dwc_isr(int irq, void *dev_instance) | |
508 | { | |
509 | struct ata_host *host = (struct ata_host *)dev_instance; | |
510 | struct sata_dwc_device *hsdev = HSDEV_FROM_HOST(host); | |
511 | struct ata_port *ap; | |
512 | struct ata_queued_cmd *qc; | |
513 | unsigned long flags; | |
514 | u8 status, tag; | |
515 | int handled, num_processed, port = 0; | |
516 | uint intpr, sactive, sactive2, tag_mask; | |
517 | struct sata_dwc_device_port *hsdevp; | |
518 | hsdev->sactive_issued = 0; | |
519 | ||
520 | spin_lock_irqsave(&host->lock, flags); | |
521 | ||
522 | /* Read the interrupt register */ | |
523 | intpr = sata_dwc_readl(&hsdev->sata_dwc_regs->intpr); | |
524 | ||
525 | ap = host->ports[port]; | |
526 | hsdevp = HSDEVP_FROM_AP(ap); | |
527 | ||
528 | dev_dbg(ap->dev, "%s intpr=0x%08x active_tag=%d\n", __func__, intpr, | |
529 | ap->link.active_tag); | |
530 | ||
531 | /* Check for error interrupt */ | |
532 | if (intpr & SATA_DWC_INTPR_ERR) { | |
533 | sata_dwc_error_intr(ap, hsdev, intpr); | |
534 | handled = 1; | |
535 | goto DONE; | |
536 | } | |
537 | ||
538 | /* Check for DMA SETUP FIS (FP DMA) interrupt */ | |
539 | if (intpr & SATA_DWC_INTPR_NEWFP) { | |
540 | clear_interrupt_bit(hsdev, SATA_DWC_INTPR_NEWFP); | |
541 | ||
542 | tag = (u8)(sata_dwc_readl(&hsdev->sata_dwc_regs->fptagr)); | |
543 | dev_dbg(ap->dev, "%s: NEWFP tag=%d\n", __func__, tag); | |
544 | if (hsdevp->cmd_issued[tag] != SATA_DWC_CMD_ISSUED_PEND) | |
545 | dev_warn(ap->dev, "CMD tag=%d not pending?\n", tag); | |
546 | ||
547 | hsdev->sactive_issued |= qcmd_tag_to_mask(tag); | |
548 | ||
549 | qc = ata_qc_from_tag(ap, tag); | |
550 | /* | |
551 | * Start FP DMA for NCQ command. At this point the tag is the | |
552 | * active tag. It is the tag that matches the command about to | |
553 | * be completed. | |
554 | */ | |
555 | qc->ap->link.active_tag = tag; | |
556 | sata_dwc_bmdma_start_by_tag(qc, tag); | |
557 | ||
558 | handled = 1; | |
559 | goto DONE; | |
560 | } | |
561 | sata_dwc_scr_read(&ap->link, SCR_ACTIVE, &sactive); | |
562 | tag_mask = (hsdev->sactive_issued | sactive) ^ sactive; | |
563 | ||
564 | /* If no sactive issued and tag_mask is zero then this is not NCQ */ | |
565 | if (hsdev->sactive_issued == 0 && tag_mask == 0) { | |
566 | if (ap->link.active_tag == ATA_TAG_POISON) | |
567 | tag = 0; | |
568 | else | |
569 | tag = ap->link.active_tag; | |
570 | qc = ata_qc_from_tag(ap, tag); | |
571 | ||
572 | /* DEV interrupt w/ no active qc? */ | |
573 | if (unlikely(!qc || (qc->tf.flags & ATA_TFLAG_POLLING))) { | |
574 | dev_err(ap->dev, | |
575 | "%s interrupt with no active qc qc=%p\n", | |
576 | __func__, qc); | |
577 | ap->ops->sff_check_status(ap); | |
578 | handled = 1; | |
579 | goto DONE; | |
580 | } | |
581 | status = ap->ops->sff_check_status(ap); | |
582 | ||
583 | qc->ap->link.active_tag = tag; | |
584 | hsdevp->cmd_issued[tag] = SATA_DWC_CMD_ISSUED_NOT; | |
585 | ||
586 | if (status & ATA_ERR) { | |
587 | dev_dbg(ap->dev, "interrupt ATA_ERR (0x%x)\n", status); | |
588 | sata_dwc_qc_complete(ap, qc, 1); | |
589 | handled = 1; | |
590 | goto DONE; | |
591 | } | |
592 | ||
593 | dev_dbg(ap->dev, "%s non-NCQ cmd interrupt, protocol: %s\n", | |
594 | __func__, get_prot_descript(qc->tf.protocol)); | |
595 | DRVSTILLBUSY: | |
596 | if (ata_is_dma(qc->tf.protocol)) { | |
597 | /* | |
598 | * Each DMA transaction produces 2 interrupts. The DMAC | |
599 | * transfer complete interrupt and the SATA controller | |
600 | * operation done interrupt. The command should be | |
601 | * completed only after both interrupts are seen. | |
602 | */ | |
603 | hsdevp->dma_interrupt_count++; | |
604 | if (hsdevp->dma_pending[tag] == \ | |
605 | SATA_DWC_DMA_PENDING_NONE) { | |
606 | dev_err(ap->dev, | |
607 | "%s: DMA not pending intpr=0x%08x status=0x%08x pending=%d\n", | |
608 | __func__, intpr, status, | |
609 | hsdevp->dma_pending[tag]); | |
610 | } | |
611 | ||
612 | if ((hsdevp->dma_interrupt_count % 2) == 0) | |
613 | sata_dwc_dma_xfer_complete(ap, 1); | |
614 | } else if (ata_is_pio(qc->tf.protocol)) { | |
615 | ata_sff_hsm_move(ap, qc, status, 0); | |
616 | handled = 1; | |
617 | goto DONE; | |
618 | } else { | |
619 | if (unlikely(sata_dwc_qc_complete(ap, qc, 1))) | |
620 | goto DRVSTILLBUSY; | |
621 | } | |
622 | ||
623 | handled = 1; | |
624 | goto DONE; | |
625 | } | |
626 | ||
627 | /* | |
628 | * This is a NCQ command. At this point we need to figure out for which | |
629 | * tags we have gotten a completion interrupt. One interrupt may serve | |
630 | * as completion for more than one operation when commands are queued | |
631 | * (NCQ). We need to process each completed command. | |
632 | */ | |
633 | ||
634 | /* process completed commands */ | |
635 | sata_dwc_scr_read(&ap->link, SCR_ACTIVE, &sactive); | |
636 | tag_mask = (hsdev->sactive_issued | sactive) ^ sactive; | |
637 | ||
638 | if (sactive != 0 || hsdev->sactive_issued > 1 || tag_mask > 1) { | |
639 | dev_dbg(ap->dev, | |
640 | "%s NCQ:sactive=0x%08x sactive_issued=0x%08x tag_mask=0x%08x\n", | |
641 | __func__, sactive, hsdev->sactive_issued, tag_mask); | |
642 | } | |
643 | ||
644 | if ((tag_mask | hsdev->sactive_issued) != hsdev->sactive_issued) { | |
645 | dev_warn(ap->dev, | |
646 | "Bad tag mask? sactive=0x%08x sactive_issued=0x%08x tag_mask=0x%08x\n", | |
647 | sactive, hsdev->sactive_issued, tag_mask); | |
648 | } | |
649 | ||
650 | /* read just to clear ... not bad if currently still busy */ | |
651 | status = ap->ops->sff_check_status(ap); | |
652 | dev_dbg(ap->dev, "%s ATA status register=0x%x\n", __func__, status); | |
653 | ||
654 | tag = 0; | |
655 | num_processed = 0; | |
656 | while (tag_mask) { | |
657 | num_processed++; | |
658 | while (!(tag_mask & 0x00000001)) { | |
659 | tag++; | |
660 | tag_mask <<= 1; | |
661 | } | |
662 | ||
663 | tag_mask &= (~0x00000001); | |
664 | qc = ata_qc_from_tag(ap, tag); | |
665 | ||
666 | /* To be picked up by completion functions */ | |
667 | qc->ap->link.active_tag = tag; | |
668 | hsdevp->cmd_issued[tag] = SATA_DWC_CMD_ISSUED_NOT; | |
669 | ||
670 | /* Let libata/scsi layers handle error */ | |
671 | if (status & ATA_ERR) { | |
672 | dev_dbg(ap->dev, "%s ATA_ERR (0x%x)\n", __func__, | |
673 | status); | |
674 | sata_dwc_qc_complete(ap, qc, 1); | |
675 | handled = 1; | |
676 | goto DONE; | |
677 | } | |
678 | ||
679 | /* Process completed command */ | |
680 | dev_dbg(ap->dev, "%s NCQ command, protocol: %s\n", __func__, | |
681 | get_prot_descript(qc->tf.protocol)); | |
682 | if (ata_is_dma(qc->tf.protocol)) { | |
683 | hsdevp->dma_interrupt_count++; | |
684 | if (hsdevp->dma_pending[tag] == \ | |
685 | SATA_DWC_DMA_PENDING_NONE) | |
686 | dev_warn(ap->dev, "%s: DMA not pending?\n", | |
687 | __func__); | |
688 | if ((hsdevp->dma_interrupt_count % 2) == 0) | |
689 | sata_dwc_dma_xfer_complete(ap, 1); | |
690 | } else { | |
691 | if (unlikely(sata_dwc_qc_complete(ap, qc, 1))) | |
692 | goto STILLBUSY; | |
693 | } | |
694 | continue; | |
695 | ||
696 | STILLBUSY: | |
697 | ap->stats.idle_irq++; | |
698 | dev_warn(ap->dev, "STILL BUSY IRQ ata%d: irq trap\n", | |
699 | ap->print_id); | |
700 | } /* while tag_mask */ | |
701 | ||
702 | /* | |
703 | * Check to see if any commands completed while we were processing our | |
704 | * initial set of completed commands (read status clears interrupts, | |
705 | * so we might miss a completed command interrupt if one came in while | |
706 | * we were processing --we read status as part of processing a completed | |
707 | * command). | |
708 | */ | |
709 | sata_dwc_scr_read(&ap->link, SCR_ACTIVE, &sactive2); | |
710 | if (sactive2 != sactive) { | |
711 | dev_dbg(ap->dev, | |
712 | "More completed - sactive=0x%x sactive2=0x%x\n", | |
713 | sactive, sactive2); | |
714 | } | |
715 | handled = 1; | |
716 | ||
717 | DONE: | |
718 | spin_unlock_irqrestore(&host->lock, flags); | |
719 | return IRQ_RETVAL(handled); | |
720 | } | |
721 | ||
722 | static void sata_dwc_clear_dmacr(struct sata_dwc_device_port *hsdevp, u8 tag) | |
723 | { | |
724 | struct sata_dwc_device *hsdev = HSDEV_FROM_HSDEVP(hsdevp); | |
725 | u32 dmacr = sata_dwc_readl(&hsdev->sata_dwc_regs->dmacr); | |
726 | ||
727 | if (hsdevp->dma_pending[tag] == SATA_DWC_DMA_PENDING_RX) { | |
728 | dmacr = SATA_DWC_DMACR_RX_CLEAR(dmacr); | |
729 | sata_dwc_writel(&hsdev->sata_dwc_regs->dmacr, dmacr); | |
730 | } else if (hsdevp->dma_pending[tag] == SATA_DWC_DMA_PENDING_TX) { | |
731 | dmacr = SATA_DWC_DMACR_TX_CLEAR(dmacr); | |
732 | sata_dwc_writel(&hsdev->sata_dwc_regs->dmacr, dmacr); | |
733 | } else { | |
734 | /* | |
735 | * This should not happen, it indicates the driver is out of | |
736 | * sync. If it does happen, clear dmacr anyway. | |
737 | */ | |
738 | dev_err(hsdev->dev, | |
739 | "%s DMA protocol RX and TX DMA not pending tag=0x%02x pending=%d dmacr: 0x%08x\n", | |
740 | __func__, tag, hsdevp->dma_pending[tag], dmacr); | |
741 | sata_dwc_writel(&hsdev->sata_dwc_regs->dmacr, | |
742 | SATA_DWC_DMACR_TXRXCH_CLEAR); | |
743 | } | |
744 | } | |
745 | ||
746 | static void sata_dwc_dma_xfer_complete(struct ata_port *ap, u32 check_status) | |
747 | { | |
748 | struct ata_queued_cmd *qc; | |
749 | struct sata_dwc_device_port *hsdevp = HSDEVP_FROM_AP(ap); | |
750 | struct sata_dwc_device *hsdev = HSDEV_FROM_AP(ap); | |
751 | u8 tag = 0; | |
752 | ||
753 | tag = ap->link.active_tag; | |
754 | qc = ata_qc_from_tag(ap, tag); | |
755 | if (!qc) { | |
756 | dev_err(ap->dev, "failed to get qc"); | |
757 | return; | |
758 | } | |
759 | ||
760 | #ifdef DEBUG_NCQ | |
761 | if (tag > 0) { | |
762 | dev_info(ap->dev, | |
763 | "%s tag=%u cmd=0x%02x dma dir=%s proto=%s dmacr=0x%08x\n", | |
764 | __func__, qc->tag, qc->tf.command, | |
765 | get_dma_dir_descript(qc->dma_dir), | |
766 | get_prot_descript(qc->tf.protocol), | |
767 | sata_dwc_readl(&hsdev->sata_dwc_regs->dmacr)); | |
768 | } | |
769 | #endif | |
770 | ||
771 | if (ata_is_dma(qc->tf.protocol)) { | |
772 | if (hsdevp->dma_pending[tag] == SATA_DWC_DMA_PENDING_NONE) { | |
773 | dev_err(ap->dev, | |
774 | "%s DMA protocol RX and TX DMA not pending dmacr: 0x%08x\n", | |
775 | __func__, | |
776 | sata_dwc_readl(&hsdev->sata_dwc_regs->dmacr)); | |
777 | } | |
778 | ||
779 | hsdevp->dma_pending[tag] = SATA_DWC_DMA_PENDING_NONE; | |
780 | sata_dwc_qc_complete(ap, qc, check_status); | |
781 | ap->link.active_tag = ATA_TAG_POISON; | |
782 | } else { | |
783 | sata_dwc_qc_complete(ap, qc, check_status); | |
784 | } | |
785 | } | |
786 | ||
787 | static int sata_dwc_qc_complete(struct ata_port *ap, struct ata_queued_cmd *qc, | |
788 | u32 check_status) | |
789 | { | |
790 | u8 status = 0; | |
791 | u32 mask = 0x0; | |
792 | u8 tag = qc->tag; | |
793 | struct sata_dwc_device *hsdev = HSDEV_FROM_AP(ap); | |
794 | struct sata_dwc_device_port *hsdevp = HSDEVP_FROM_AP(ap); | |
795 | hsdev->sactive_queued = 0; | |
796 | dev_dbg(ap->dev, "%s checkstatus? %x\n", __func__, check_status); | |
797 | ||
798 | if (hsdevp->dma_pending[tag] == SATA_DWC_DMA_PENDING_TX) | |
799 | dev_err(ap->dev, "TX DMA PENDING\n"); | |
800 | else if (hsdevp->dma_pending[tag] == SATA_DWC_DMA_PENDING_RX) | |
801 | dev_err(ap->dev, "RX DMA PENDING\n"); | |
802 | dev_dbg(ap->dev, | |
803 | "QC complete cmd=0x%02x status=0x%02x ata%u: protocol=%d\n", | |
804 | qc->tf.command, status, ap->print_id, qc->tf.protocol); | |
805 | ||
806 | /* clear active bit */ | |
807 | mask = (~(qcmd_tag_to_mask(tag))); | |
808 | hsdev->sactive_queued = hsdev->sactive_queued & mask; | |
809 | hsdev->sactive_issued = hsdev->sactive_issued & mask; | |
810 | ata_qc_complete(qc); | |
811 | return 0; | |
812 | } | |
813 | ||
814 | static void sata_dwc_enable_interrupts(struct sata_dwc_device *hsdev) | |
815 | { | |
816 | /* Enable selective interrupts by setting the interrupt maskregister*/ | |
817 | sata_dwc_writel(&hsdev->sata_dwc_regs->intmr, | |
818 | SATA_DWC_INTMR_ERRM | | |
819 | SATA_DWC_INTMR_NEWFPM | | |
820 | SATA_DWC_INTMR_PMABRTM | | |
821 | SATA_DWC_INTMR_DMATM); | |
822 | /* | |
823 | * Unmask the error bits that should trigger an error interrupt by | |
824 | * setting the error mask register. | |
825 | */ | |
826 | sata_dwc_writel(&hsdev->sata_dwc_regs->errmr, SATA_DWC_SERROR_ERR_BITS); | |
827 | ||
828 | dev_dbg(hsdev->dev, "%s: INTMR = 0x%08x, ERRMR = 0x%08x\n", | |
829 | __func__, sata_dwc_readl(&hsdev->sata_dwc_regs->intmr), | |
830 | sata_dwc_readl(&hsdev->sata_dwc_regs->errmr)); | |
831 | } | |
832 | ||
833 | static void sata_dwc_setup_port(struct ata_ioports *port, void __iomem *base) | |
834 | { | |
835 | port->cmd_addr = base + 0x00; | |
836 | port->data_addr = base + 0x00; | |
837 | ||
838 | port->error_addr = base + 0x04; | |
839 | port->feature_addr = base + 0x04; | |
840 | ||
841 | port->nsect_addr = base + 0x08; | |
842 | ||
843 | port->lbal_addr = base + 0x0c; | |
844 | port->lbam_addr = base + 0x10; | |
845 | port->lbah_addr = base + 0x14; | |
846 | ||
847 | port->device_addr = base + 0x18; | |
848 | port->command_addr = base + 0x1c; | |
849 | port->status_addr = base + 0x1c; | |
850 | ||
851 | port->altstatus_addr = base + 0x20; | |
852 | port->ctl_addr = base + 0x20; | |
853 | } | |
854 | ||
855 | static int sata_dwc_dma_get_channel(struct sata_dwc_device_port *hsdevp) | |
856 | { | |
857 | struct sata_dwc_device *hsdev = hsdevp->hsdev; | |
858 | struct device *dev = hsdev->dev; | |
859 | ||
860 | #ifdef CONFIG_SATA_DWC_OLD_DMA | |
861 | if (!of_find_property(dev->of_node, "dmas", NULL)) | |
862 | return sata_dwc_dma_get_channel_old(hsdevp); | |
863 | #endif | |
864 | ||
865 | hsdevp->chan = dma_request_chan(dev, "sata-dma"); | |
866 | if (IS_ERR(hsdevp->chan)) { | |
867 | dev_err(dev, "failed to allocate dma channel: %ld\n", | |
868 | PTR_ERR(hsdevp->chan)); | |
869 | return PTR_ERR(hsdevp->chan); | |
870 | } | |
871 | ||
872 | return 0; | |
873 | } | |
874 | ||
875 | /* | |
876 | * Function : sata_dwc_port_start | |
877 | * arguments : struct ata_ioports *port | |
878 | * Return value : returns 0 if success, error code otherwise | |
879 | * This function allocates the scatter gather LLI table for AHB DMA | |
880 | */ | |
881 | static int sata_dwc_port_start(struct ata_port *ap) | |
882 | { | |
883 | int err = 0; | |
884 | struct sata_dwc_device *hsdev; | |
885 | struct sata_dwc_device_port *hsdevp = NULL; | |
886 | struct device *pdev; | |
887 | int i; | |
888 | ||
889 | hsdev = HSDEV_FROM_AP(ap); | |
890 | ||
891 | dev_dbg(ap->dev, "%s: port_no=%d\n", __func__, ap->port_no); | |
892 | ||
893 | hsdev->host = ap->host; | |
894 | pdev = ap->host->dev; | |
895 | if (!pdev) { | |
896 | dev_err(ap->dev, "%s: no ap->host->dev\n", __func__); | |
897 | err = -ENODEV; | |
898 | goto CLEANUP; | |
899 | } | |
900 | ||
901 | /* Allocate Port Struct */ | |
902 | hsdevp = kzalloc(sizeof(*hsdevp), GFP_KERNEL); | |
903 | if (!hsdevp) { | |
904 | dev_err(ap->dev, "%s: kmalloc failed for hsdevp\n", __func__); | |
905 | err = -ENOMEM; | |
906 | goto CLEANUP; | |
907 | } | |
908 | hsdevp->hsdev = hsdev; | |
909 | ||
910 | err = sata_dwc_dma_get_channel(hsdevp); | |
911 | if (err) | |
912 | goto CLEANUP_ALLOC; | |
913 | ||
914 | err = phy_power_on(hsdev->phy); | |
915 | if (err) | |
916 | goto CLEANUP_ALLOC; | |
917 | ||
918 | for (i = 0; i < SATA_DWC_QCMD_MAX; i++) | |
919 | hsdevp->cmd_issued[i] = SATA_DWC_CMD_ISSUED_NOT; | |
920 | ||
921 | ap->bmdma_prd = NULL; /* set these so libata doesn't use them */ | |
922 | ap->bmdma_prd_dma = 0; | |
923 | ||
924 | if (ap->port_no == 0) { | |
925 | dev_dbg(ap->dev, "%s: clearing TXCHEN, RXCHEN in DMAC\n", | |
926 | __func__); | |
927 | sata_dwc_writel(&hsdev->sata_dwc_regs->dmacr, | |
928 | SATA_DWC_DMACR_TXRXCH_CLEAR); | |
929 | ||
930 | dev_dbg(ap->dev, "%s: setting burst size in DBTSR\n", | |
931 | __func__); | |
932 | sata_dwc_writel(&hsdev->sata_dwc_regs->dbtsr, | |
933 | (SATA_DWC_DBTSR_MWR(AHB_DMA_BRST_DFLT) | | |
934 | SATA_DWC_DBTSR_MRD(AHB_DMA_BRST_DFLT))); | |
935 | } | |
936 | ||
937 | /* Clear any error bits before libata starts issuing commands */ | |
938 | clear_serror(ap); | |
939 | ap->private_data = hsdevp; | |
940 | dev_dbg(ap->dev, "%s: done\n", __func__); | |
941 | return 0; | |
942 | ||
943 | CLEANUP_ALLOC: | |
944 | kfree(hsdevp); | |
945 | CLEANUP: | |
946 | dev_dbg(ap->dev, "%s: fail. ap->id = %d\n", __func__, ap->print_id); | |
947 | return err; | |
948 | } | |
949 | ||
950 | static void sata_dwc_port_stop(struct ata_port *ap) | |
951 | { | |
952 | struct sata_dwc_device_port *hsdevp = HSDEVP_FROM_AP(ap); | |
953 | struct sata_dwc_device *hsdev = HSDEV_FROM_AP(ap); | |
954 | ||
955 | dev_dbg(ap->dev, "%s: ap->id = %d\n", __func__, ap->print_id); | |
956 | ||
957 | dmaengine_terminate_sync(hsdevp->chan); | |
958 | dma_release_channel(hsdevp->chan); | |
959 | phy_power_off(hsdev->phy); | |
960 | ||
961 | kfree(hsdevp); | |
962 | ap->private_data = NULL; | |
963 | } | |
964 | ||
965 | /* | |
966 | * Function : sata_dwc_exec_command_by_tag | |
967 | * arguments : ata_port *ap, ata_taskfile *tf, u8 tag, u32 cmd_issued | |
968 | * Return value : None | |
969 | * This function keeps track of individual command tag ids and calls | |
970 | * ata_exec_command in libata | |
971 | */ | |
972 | static void sata_dwc_exec_command_by_tag(struct ata_port *ap, | |
973 | struct ata_taskfile *tf, | |
974 | u8 tag, u32 cmd_issued) | |
975 | { | |
976 | struct sata_dwc_device_port *hsdevp = HSDEVP_FROM_AP(ap); | |
977 | ||
978 | dev_dbg(ap->dev, "%s cmd(0x%02x): %s tag=%d\n", __func__, tf->command, | |
979 | ata_get_cmd_descript(tf->command), tag); | |
980 | ||
981 | hsdevp->cmd_issued[tag] = cmd_issued; | |
982 | ||
983 | /* | |
984 | * Clear SError before executing a new command. | |
985 | * sata_dwc_scr_write and read can not be used here. Clearing the PM | |
986 | * managed SError register for the disk needs to be done before the | |
987 | * task file is loaded. | |
988 | */ | |
989 | clear_serror(ap); | |
990 | ata_sff_exec_command(ap, tf); | |
991 | } | |
992 | ||
993 | static void sata_dwc_bmdma_setup_by_tag(struct ata_queued_cmd *qc, u8 tag) | |
994 | { | |
995 | sata_dwc_exec_command_by_tag(qc->ap, &qc->tf, tag, | |
996 | SATA_DWC_CMD_ISSUED_PEND); | |
997 | } | |
998 | ||
999 | static void sata_dwc_bmdma_setup(struct ata_queued_cmd *qc) | |
1000 | { | |
1001 | u8 tag = qc->tag; | |
1002 | ||
1003 | if (ata_is_ncq(qc->tf.protocol)) { | |
1004 | dev_dbg(qc->ap->dev, "%s: ap->link.sactive=0x%08x tag=%d\n", | |
1005 | __func__, qc->ap->link.sactive, tag); | |
1006 | } else { | |
1007 | tag = 0; | |
1008 | } | |
1009 | sata_dwc_bmdma_setup_by_tag(qc, tag); | |
1010 | } | |
1011 | ||
1012 | static void sata_dwc_bmdma_start_by_tag(struct ata_queued_cmd *qc, u8 tag) | |
1013 | { | |
1014 | int start_dma; | |
1015 | u32 reg; | |
1016 | struct sata_dwc_device *hsdev = HSDEV_FROM_QC(qc); | |
1017 | struct ata_port *ap = qc->ap; | |
1018 | struct sata_dwc_device_port *hsdevp = HSDEVP_FROM_AP(ap); | |
1019 | struct dma_async_tx_descriptor *desc = hsdevp->desc[tag]; | |
1020 | int dir = qc->dma_dir; | |
1021 | ||
1022 | if (hsdevp->cmd_issued[tag] != SATA_DWC_CMD_ISSUED_NOT) { | |
1023 | start_dma = 1; | |
1024 | if (dir == DMA_TO_DEVICE) | |
1025 | hsdevp->dma_pending[tag] = SATA_DWC_DMA_PENDING_TX; | |
1026 | else | |
1027 | hsdevp->dma_pending[tag] = SATA_DWC_DMA_PENDING_RX; | |
1028 | } else { | |
1029 | dev_err(ap->dev, | |
1030 | "%s: Command not pending cmd_issued=%d (tag=%d) DMA NOT started\n", | |
1031 | __func__, hsdevp->cmd_issued[tag], tag); | |
1032 | start_dma = 0; | |
1033 | } | |
1034 | ||
1035 | dev_dbg(ap->dev, | |
1036 | "%s qc=%p tag: %x cmd: 0x%02x dma_dir: %s start_dma? %x\n", | |
1037 | __func__, qc, tag, qc->tf.command, | |
1038 | get_dma_dir_descript(qc->dma_dir), start_dma); | |
1039 | sata_dwc_tf_dump(ap, &qc->tf); | |
1040 | ||
1041 | if (start_dma) { | |
1042 | sata_dwc_scr_read(&ap->link, SCR_ERROR, ®); | |
1043 | if (reg & SATA_DWC_SERROR_ERR_BITS) { | |
1044 | dev_err(ap->dev, "%s: ****** SError=0x%08x ******\n", | |
1045 | __func__, reg); | |
1046 | } | |
1047 | ||
1048 | if (dir == DMA_TO_DEVICE) | |
1049 | sata_dwc_writel(&hsdev->sata_dwc_regs->dmacr, | |
1050 | SATA_DWC_DMACR_TXCHEN); | |
1051 | else | |
1052 | sata_dwc_writel(&hsdev->sata_dwc_regs->dmacr, | |
1053 | SATA_DWC_DMACR_RXCHEN); | |
1054 | ||
1055 | /* Enable AHB DMA transfer on the specified channel */ | |
1056 | dmaengine_submit(desc); | |
1057 | dma_async_issue_pending(hsdevp->chan); | |
1058 | } | |
1059 | } | |
1060 | ||
1061 | static void sata_dwc_bmdma_start(struct ata_queued_cmd *qc) | |
1062 | { | |
1063 | u8 tag = qc->tag; | |
1064 | ||
1065 | if (ata_is_ncq(qc->tf.protocol)) { | |
1066 | dev_dbg(qc->ap->dev, "%s: ap->link.sactive=0x%08x tag=%d\n", | |
1067 | __func__, qc->ap->link.sactive, tag); | |
1068 | } else { | |
1069 | tag = 0; | |
1070 | } | |
1071 | dev_dbg(qc->ap->dev, "%s\n", __func__); | |
1072 | sata_dwc_bmdma_start_by_tag(qc, tag); | |
1073 | } | |
1074 | ||
1075 | static unsigned int sata_dwc_qc_issue(struct ata_queued_cmd *qc) | |
1076 | { | |
1077 | u32 sactive; | |
1078 | u8 tag = qc->tag; | |
1079 | struct ata_port *ap = qc->ap; | |
1080 | struct sata_dwc_device_port *hsdevp = HSDEVP_FROM_AP(ap); | |
1081 | ||
1082 | #ifdef DEBUG_NCQ | |
1083 | if (qc->tag > 0 || ap->link.sactive > 1) | |
1084 | dev_info(ap->dev, | |
1085 | "%s ap id=%d cmd(0x%02x)=%s qc tag=%d prot=%s ap active_tag=0x%08x ap sactive=0x%08x\n", | |
1086 | __func__, ap->print_id, qc->tf.command, | |
1087 | ata_get_cmd_descript(qc->tf.command), | |
1088 | qc->tag, get_prot_descript(qc->tf.protocol), | |
1089 | ap->link.active_tag, ap->link.sactive); | |
1090 | #endif | |
1091 | ||
1092 | if (!ata_is_ncq(qc->tf.protocol)) | |
1093 | tag = 0; | |
1094 | ||
1095 | if (ata_is_dma(qc->tf.protocol)) { | |
1096 | hsdevp->desc[tag] = dma_dwc_xfer_setup(qc); | |
1097 | if (!hsdevp->desc[tag]) | |
1098 | return AC_ERR_SYSTEM; | |
1099 | } else { | |
1100 | hsdevp->desc[tag] = NULL; | |
1101 | } | |
1102 | ||
1103 | if (ata_is_ncq(qc->tf.protocol)) { | |
1104 | sata_dwc_scr_read(&ap->link, SCR_ACTIVE, &sactive); | |
1105 | sactive |= (0x00000001 << tag); | |
1106 | sata_dwc_scr_write(&ap->link, SCR_ACTIVE, sactive); | |
1107 | ||
1108 | dev_dbg(qc->ap->dev, | |
1109 | "%s: tag=%d ap->link.sactive = 0x%08x sactive=0x%08x\n", | |
1110 | __func__, tag, qc->ap->link.sactive, sactive); | |
1111 | ||
1112 | ap->ops->sff_tf_load(ap, &qc->tf); | |
1113 | sata_dwc_exec_command_by_tag(ap, &qc->tf, tag, | |
1114 | SATA_DWC_CMD_ISSUED_PEND); | |
1115 | } else { | |
1116 | return ata_bmdma_qc_issue(qc); | |
1117 | } | |
1118 | return 0; | |
1119 | } | |
1120 | ||
1121 | static void sata_dwc_error_handler(struct ata_port *ap) | |
1122 | { | |
1123 | ata_sff_error_handler(ap); | |
1124 | } | |
1125 | ||
1126 | static int sata_dwc_hardreset(struct ata_link *link, unsigned int *class, | |
1127 | unsigned long deadline) | |
1128 | { | |
1129 | struct sata_dwc_device *hsdev = HSDEV_FROM_AP(link->ap); | |
1130 | int ret; | |
1131 | ||
1132 | ret = sata_sff_hardreset(link, class, deadline); | |
1133 | ||
1134 | sata_dwc_enable_interrupts(hsdev); | |
1135 | ||
1136 | /* Reconfigure the DMA control register */ | |
1137 | sata_dwc_writel(&hsdev->sata_dwc_regs->dmacr, | |
1138 | SATA_DWC_DMACR_TXRXCH_CLEAR); | |
1139 | ||
1140 | /* Reconfigure the DMA Burst Transaction Size register */ | |
1141 | sata_dwc_writel(&hsdev->sata_dwc_regs->dbtsr, | |
1142 | SATA_DWC_DBTSR_MWR(AHB_DMA_BRST_DFLT) | | |
1143 | SATA_DWC_DBTSR_MRD(AHB_DMA_BRST_DFLT)); | |
1144 | ||
1145 | return ret; | |
1146 | } | |
1147 | ||
1148 | static void sata_dwc_dev_select(struct ata_port *ap, unsigned int device) | |
1149 | { | |
1150 | /* SATA DWC is master only */ | |
1151 | } | |
1152 | ||
1153 | /* | |
1154 | * scsi mid-layer and libata interface structures | |
1155 | */ | |
1156 | static struct scsi_host_template sata_dwc_sht = { | |
1157 | ATA_NCQ_SHT(DRV_NAME), | |
1158 | /* | |
1159 | * test-only: Currently this driver doesn't handle NCQ | |
1160 | * correctly. We enable NCQ but set the queue depth to a | |
1161 | * max of 1. This will get fixed in in a future release. | |
1162 | */ | |
1163 | .sg_tablesize = LIBATA_MAX_PRD, | |
1164 | /* .can_queue = ATA_MAX_QUEUE, */ | |
1165 | /* | |
1166 | * Make sure a LLI block is not created that will span 8K max FIS | |
1167 | * boundary. If the block spans such a FIS boundary, there is a chance | |
1168 | * that a DMA burst will cross that boundary -- this results in an | |
1169 | * error in the host controller. | |
1170 | */ | |
1171 | .dma_boundary = 0x1fff /* ATA_DMA_BOUNDARY */, | |
1172 | }; | |
1173 | ||
1174 | static struct ata_port_operations sata_dwc_ops = { | |
1175 | .inherits = &ata_sff_port_ops, | |
1176 | ||
1177 | .error_handler = sata_dwc_error_handler, | |
1178 | .hardreset = sata_dwc_hardreset, | |
1179 | ||
1180 | .qc_issue = sata_dwc_qc_issue, | |
1181 | ||
1182 | .scr_read = sata_dwc_scr_read, | |
1183 | .scr_write = sata_dwc_scr_write, | |
1184 | ||
1185 | .port_start = sata_dwc_port_start, | |
1186 | .port_stop = sata_dwc_port_stop, | |
1187 | ||
1188 | .sff_dev_select = sata_dwc_dev_select, | |
1189 | ||
1190 | .bmdma_setup = sata_dwc_bmdma_setup, | |
1191 | .bmdma_start = sata_dwc_bmdma_start, | |
1192 | }; | |
1193 | ||
1194 | static const struct ata_port_info sata_dwc_port_info[] = { | |
1195 | { | |
1196 | .flags = ATA_FLAG_SATA | ATA_FLAG_NCQ, | |
1197 | .pio_mask = ATA_PIO4, | |
1198 | .udma_mask = ATA_UDMA6, | |
1199 | .port_ops = &sata_dwc_ops, | |
1200 | }, | |
1201 | }; | |
1202 | ||
1203 | static int sata_dwc_probe(struct platform_device *ofdev) | |
1204 | { | |
1205 | struct sata_dwc_device *hsdev; | |
1206 | u32 idr, versionr; | |
1207 | char *ver = (char *)&versionr; | |
1208 | void __iomem *base; | |
1209 | int err = 0; | |
1210 | int irq; | |
1211 | struct ata_host *host; | |
1212 | struct ata_port_info pi = sata_dwc_port_info[0]; | |
1213 | const struct ata_port_info *ppi[] = { &pi, NULL }; | |
1214 | struct device_node *np = ofdev->dev.of_node; | |
1215 | struct resource *res; | |
1216 | ||
1217 | /* Allocate DWC SATA device */ | |
1218 | host = ata_host_alloc_pinfo(&ofdev->dev, ppi, SATA_DWC_MAX_PORTS); | |
1219 | hsdev = devm_kzalloc(&ofdev->dev, sizeof(*hsdev), GFP_KERNEL); | |
1220 | if (!host || !hsdev) | |
1221 | return -ENOMEM; | |
1222 | ||
1223 | host->private_data = hsdev; | |
1224 | ||
1225 | /* Ioremap SATA registers */ | |
1226 | res = platform_get_resource(ofdev, IORESOURCE_MEM, 0); | |
1227 | base = devm_ioremap_resource(&ofdev->dev, res); | |
1228 | if (IS_ERR(base)) { | |
1229 | dev_err(&ofdev->dev, | |
1230 | "ioremap failed for SATA register address\n"); | |
1231 | return PTR_ERR(base); | |
1232 | } | |
1233 | dev_dbg(&ofdev->dev, "ioremap done for SATA register address\n"); | |
1234 | ||
1235 | /* Synopsys DWC SATA specific Registers */ | |
1236 | hsdev->sata_dwc_regs = base + SATA_DWC_REG_OFFSET; | |
1237 | hsdev->dmadr = res->start + SATA_DWC_REG_OFFSET + offsetof(struct sata_dwc_regs, dmadr); | |
1238 | ||
1239 | /* Setup port */ | |
1240 | host->ports[0]->ioaddr.cmd_addr = base; | |
1241 | host->ports[0]->ioaddr.scr_addr = base + SATA_DWC_SCR_OFFSET; | |
1242 | sata_dwc_setup_port(&host->ports[0]->ioaddr, base); | |
1243 | ||
1244 | /* Read the ID and Version Registers */ | |
1245 | idr = sata_dwc_readl(&hsdev->sata_dwc_regs->idr); | |
1246 | versionr = sata_dwc_readl(&hsdev->sata_dwc_regs->versionr); | |
1247 | dev_notice(&ofdev->dev, "id %d, controller version %c.%c%c\n", | |
1248 | idr, ver[0], ver[1], ver[2]); | |
1249 | ||
1250 | /* Save dev for later use in dev_xxx() routines */ | |
1251 | hsdev->dev = &ofdev->dev; | |
1252 | ||
1253 | /* Enable SATA Interrupts */ | |
1254 | sata_dwc_enable_interrupts(hsdev); | |
1255 | ||
1256 | /* Get SATA interrupt number */ | |
1257 | irq = irq_of_parse_and_map(np, 0); | |
1258 | if (irq == NO_IRQ) { | |
1259 | dev_err(&ofdev->dev, "no SATA DMA irq\n"); | |
1260 | err = -ENODEV; | |
1261 | goto error_out; | |
1262 | } | |
1263 | ||
1264 | #ifdef CONFIG_SATA_DWC_OLD_DMA | |
1265 | if (!of_find_property(np, "dmas", NULL)) { | |
1266 | err = sata_dwc_dma_init_old(ofdev, hsdev); | |
1267 | if (err) | |
1268 | goto error_out; | |
1269 | } | |
1270 | #endif | |
1271 | ||
1272 | hsdev->phy = devm_phy_optional_get(hsdev->dev, "sata-phy"); | |
1273 | if (IS_ERR(hsdev->phy)) { | |
1274 | err = PTR_ERR(hsdev->phy); | |
1275 | hsdev->phy = NULL; | |
1276 | goto error_out; | |
1277 | } | |
1278 | ||
1279 | err = phy_init(hsdev->phy); | |
1280 | if (err) | |
1281 | goto error_out; | |
1282 | ||
1283 | /* | |
1284 | * Now, register with libATA core, this will also initiate the | |
1285 | * device discovery process, invoking our port_start() handler & | |
1286 | * error_handler() to execute a dummy Softreset EH session | |
1287 | */ | |
1288 | err = ata_host_activate(host, irq, sata_dwc_isr, 0, &sata_dwc_sht); | |
1289 | if (err) | |
1290 | dev_err(&ofdev->dev, "failed to activate host"); | |
1291 | ||
1292 | dev_set_drvdata(&ofdev->dev, host); | |
1293 | return 0; | |
1294 | ||
1295 | error_out: | |
1296 | phy_exit(hsdev->phy); | |
1297 | return err; | |
1298 | } | |
1299 | ||
1300 | static int sata_dwc_remove(struct platform_device *ofdev) | |
1301 | { | |
1302 | struct device *dev = &ofdev->dev; | |
1303 | struct ata_host *host = dev_get_drvdata(dev); | |
1304 | struct sata_dwc_device *hsdev = host->private_data; | |
1305 | ||
1306 | ata_host_detach(host); | |
1307 | ||
1308 | phy_exit(hsdev->phy); | |
1309 | ||
1310 | #ifdef CONFIG_SATA_DWC_OLD_DMA | |
1311 | /* Free SATA DMA resources */ | |
1312 | sata_dwc_dma_exit_old(hsdev); | |
1313 | #endif | |
1314 | ||
1315 | dev_dbg(&ofdev->dev, "done\n"); | |
1316 | return 0; | |
1317 | } | |
1318 | ||
1319 | static const struct of_device_id sata_dwc_match[] = { | |
1320 | { .compatible = "amcc,sata-460ex", }, | |
1321 | {} | |
1322 | }; | |
1323 | MODULE_DEVICE_TABLE(of, sata_dwc_match); | |
1324 | ||
1325 | static struct platform_driver sata_dwc_driver = { | |
1326 | .driver = { | |
1327 | .name = DRV_NAME, | |
1328 | .of_match_table = sata_dwc_match, | |
1329 | }, | |
1330 | .probe = sata_dwc_probe, | |
1331 | .remove = sata_dwc_remove, | |
1332 | }; | |
1333 | ||
1334 | module_platform_driver(sata_dwc_driver); | |
1335 | ||
1336 | MODULE_LICENSE("GPL"); | |
1337 | MODULE_AUTHOR("Mark Miesfeld <mmiesfeld@amcc.com>"); | |
1338 | MODULE_DESCRIPTION("DesignWare Cores SATA controller low level driver"); | |
1339 | MODULE_VERSION(DRV_VERSION); |