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faf0b2e5 LY |
1 | /* |
2 | * drivers/ata/sata_fsl.c | |
3 | * | |
4 | * Freescale 3.0Gbps SATA device driver | |
5 | * | |
6 | * Author: Ashish Kalra <ashish.kalra@freescale.com> | |
7 | * Li Yang <leoli@freescale.com> | |
8 | * | |
9 | * Copyright (c) 2006-2007 Freescale Semiconductor, Inc. | |
10 | * | |
11 | * This program is free software; you can redistribute it and/or modify it | |
12 | * under the terms of the GNU General Public License as published by the | |
13 | * Free Software Foundation; either version 2 of the License, or (at your | |
14 | * option) any later version. | |
15 | * | |
16 | */ | |
17 | ||
18 | #include <linux/kernel.h> | |
19 | #include <linux/module.h> | |
20 | #include <linux/platform_device.h> | |
21 | ||
22 | #include <scsi/scsi_host.h> | |
23 | #include <scsi/scsi_cmnd.h> | |
24 | #include <linux/libata.h> | |
25 | #include <asm/io.h> | |
26 | #include <linux/of_platform.h> | |
27 | ||
28 | /* Controller information */ | |
29 | enum { | |
30 | SATA_FSL_QUEUE_DEPTH = 16, | |
31 | SATA_FSL_MAX_PRD = 63, | |
32 | SATA_FSL_MAX_PRD_USABLE = SATA_FSL_MAX_PRD - 1, | |
33 | SATA_FSL_MAX_PRD_DIRECT = 16, /* Direct PRDT entries */ | |
34 | ||
35 | SATA_FSL_HOST_FLAGS = (ATA_FLAG_SATA | ATA_FLAG_NO_LEGACY | | |
36 | ATA_FLAG_MMIO | ATA_FLAG_PIO_DMA | | |
1bf617b7 | 37 | ATA_FLAG_NCQ), |
faf0b2e5 LY |
38 | |
39 | SATA_FSL_MAX_CMDS = SATA_FSL_QUEUE_DEPTH, | |
40 | SATA_FSL_CMD_HDR_SIZE = 16, /* 4 DWORDS */ | |
41 | SATA_FSL_CMD_SLOT_SIZE = (SATA_FSL_MAX_CMDS * SATA_FSL_CMD_HDR_SIZE), | |
42 | ||
43 | /* | |
44 | * SATA-FSL host controller supports a max. of (15+1) direct PRDEs, and | |
45 | * chained indirect PRDEs upto a max count of 63. | |
46 | * We are allocating an array of 63 PRDEs contigiously, but PRDE#15 will | |
47 | * be setup as an indirect descriptor, pointing to it's next | |
48 | * (contigious) PRDE. Though chained indirect PRDE arrays are | |
49 | * supported,it will be more efficient to use a direct PRDT and | |
50 | * a single chain/link to indirect PRDE array/PRDT. | |
51 | */ | |
52 | ||
53 | SATA_FSL_CMD_DESC_CFIS_SZ = 32, | |
54 | SATA_FSL_CMD_DESC_SFIS_SZ = 32, | |
55 | SATA_FSL_CMD_DESC_ACMD_SZ = 16, | |
56 | SATA_FSL_CMD_DESC_RSRVD = 16, | |
57 | ||
58 | SATA_FSL_CMD_DESC_SIZE = (SATA_FSL_CMD_DESC_CFIS_SZ + | |
59 | SATA_FSL_CMD_DESC_SFIS_SZ + | |
60 | SATA_FSL_CMD_DESC_ACMD_SZ + | |
61 | SATA_FSL_CMD_DESC_RSRVD + | |
62 | SATA_FSL_MAX_PRD * 16), | |
63 | ||
64 | SATA_FSL_CMD_DESC_OFFSET_TO_PRDT = | |
65 | (SATA_FSL_CMD_DESC_CFIS_SZ + | |
66 | SATA_FSL_CMD_DESC_SFIS_SZ + | |
67 | SATA_FSL_CMD_DESC_ACMD_SZ + | |
68 | SATA_FSL_CMD_DESC_RSRVD), | |
69 | ||
70 | SATA_FSL_CMD_DESC_AR_SZ = (SATA_FSL_CMD_DESC_SIZE * SATA_FSL_MAX_CMDS), | |
71 | SATA_FSL_PORT_PRIV_DMA_SZ = (SATA_FSL_CMD_SLOT_SIZE + | |
72 | SATA_FSL_CMD_DESC_AR_SZ), | |
73 | ||
74 | /* | |
75 | * MPC8315 has two SATA controllers, SATA1 & SATA2 | |
76 | * (one port per controller) | |
77 | * MPC837x has 2/4 controllers, one port per controller | |
78 | */ | |
79 | ||
80 | SATA_FSL_MAX_PORTS = 1, | |
81 | ||
82 | SATA_FSL_IRQ_FLAG = IRQF_SHARED, | |
83 | }; | |
84 | ||
85 | /* | |
86 | * Host Controller command register set - per port | |
87 | */ | |
88 | enum { | |
89 | CQ = 0, | |
90 | CA = 8, | |
91 | CC = 0x10, | |
92 | CE = 0x18, | |
93 | DE = 0x20, | |
94 | CHBA = 0x24, | |
95 | HSTATUS = 0x28, | |
96 | HCONTROL = 0x2C, | |
97 | CQPMP = 0x30, | |
98 | SIGNATURE = 0x34, | |
99 | ICC = 0x38, | |
100 | ||
101 | /* | |
102 | * Host Status Register (HStatus) bitdefs | |
103 | */ | |
104 | ONLINE = (1 << 31), | |
105 | GOING_OFFLINE = (1 << 30), | |
106 | BIST_ERR = (1 << 29), | |
107 | ||
108 | FATAL_ERR_HC_MASTER_ERR = (1 << 18), | |
109 | FATAL_ERR_PARITY_ERR_TX = (1 << 17), | |
110 | FATAL_ERR_PARITY_ERR_RX = (1 << 16), | |
111 | FATAL_ERR_DATA_UNDERRUN = (1 << 13), | |
112 | FATAL_ERR_DATA_OVERRUN = (1 << 12), | |
113 | FATAL_ERR_CRC_ERR_TX = (1 << 11), | |
114 | FATAL_ERR_CRC_ERR_RX = (1 << 10), | |
115 | FATAL_ERR_FIFO_OVRFL_TX = (1 << 9), | |
116 | FATAL_ERR_FIFO_OVRFL_RX = (1 << 8), | |
117 | ||
118 | FATAL_ERROR_DECODE = FATAL_ERR_HC_MASTER_ERR | | |
119 | FATAL_ERR_PARITY_ERR_TX | | |
120 | FATAL_ERR_PARITY_ERR_RX | | |
121 | FATAL_ERR_DATA_UNDERRUN | | |
122 | FATAL_ERR_DATA_OVERRUN | | |
123 | FATAL_ERR_CRC_ERR_TX | | |
124 | FATAL_ERR_CRC_ERR_RX | | |
125 | FATAL_ERR_FIFO_OVRFL_TX | FATAL_ERR_FIFO_OVRFL_RX, | |
126 | ||
127 | INT_ON_FATAL_ERR = (1 << 5), | |
128 | INT_ON_PHYRDY_CHG = (1 << 4), | |
129 | ||
130 | INT_ON_SIGNATURE_UPDATE = (1 << 3), | |
131 | INT_ON_SNOTIFY_UPDATE = (1 << 2), | |
132 | INT_ON_SINGL_DEVICE_ERR = (1 << 1), | |
133 | INT_ON_CMD_COMPLETE = 1, | |
134 | ||
135 | INT_ON_ERROR = INT_ON_FATAL_ERR | | |
136 | INT_ON_PHYRDY_CHG | INT_ON_SINGL_DEVICE_ERR, | |
137 | ||
138 | /* | |
139 | * Host Control Register (HControl) bitdefs | |
140 | */ | |
141 | HCONTROL_ONLINE_PHY_RST = (1 << 31), | |
142 | HCONTROL_FORCE_OFFLINE = (1 << 30), | |
143 | HCONTROL_PARITY_PROT_MOD = (1 << 14), | |
144 | HCONTROL_DPATH_PARITY = (1 << 12), | |
145 | HCONTROL_SNOOP_ENABLE = (1 << 10), | |
146 | HCONTROL_PMP_ATTACHED = (1 << 9), | |
147 | HCONTROL_COPYOUT_STATFIS = (1 << 8), | |
148 | IE_ON_FATAL_ERR = (1 << 5), | |
149 | IE_ON_PHYRDY_CHG = (1 << 4), | |
150 | IE_ON_SIGNATURE_UPDATE = (1 << 3), | |
151 | IE_ON_SNOTIFY_UPDATE = (1 << 2), | |
152 | IE_ON_SINGL_DEVICE_ERR = (1 << 1), | |
153 | IE_ON_CMD_COMPLETE = 1, | |
154 | ||
155 | DEFAULT_PORT_IRQ_ENABLE_MASK = IE_ON_FATAL_ERR | IE_ON_PHYRDY_CHG | | |
156 | IE_ON_SIGNATURE_UPDATE | | |
157 | IE_ON_SINGL_DEVICE_ERR | IE_ON_CMD_COMPLETE, | |
158 | ||
159 | EXT_INDIRECT_SEG_PRD_FLAG = (1 << 31), | |
160 | DATA_SNOOP_ENABLE = (1 << 22), | |
161 | }; | |
162 | ||
163 | /* | |
164 | * SATA Superset Registers | |
165 | */ | |
166 | enum { | |
167 | SSTATUS = 0, | |
168 | SERROR = 4, | |
169 | SCONTROL = 8, | |
170 | SNOTIFY = 0xC, | |
171 | }; | |
172 | ||
173 | /* | |
174 | * Control Status Register Set | |
175 | */ | |
176 | enum { | |
177 | TRANSCFG = 0, | |
178 | TRANSSTATUS = 4, | |
179 | LINKCFG = 8, | |
180 | LINKCFG1 = 0xC, | |
181 | LINKCFG2 = 0x10, | |
182 | LINKSTATUS = 0x14, | |
183 | LINKSTATUS1 = 0x18, | |
184 | PHYCTRLCFG = 0x1C, | |
185 | COMMANDSTAT = 0x20, | |
186 | }; | |
187 | ||
188 | /* PHY (link-layer) configuration control */ | |
189 | enum { | |
190 | PHY_BIST_ENABLE = 0x01, | |
191 | }; | |
192 | ||
193 | /* | |
194 | * Command Header Table entry, i.e, command slot | |
195 | * 4 Dwords per command slot, command header size == 64 Dwords. | |
196 | */ | |
197 | struct cmdhdr_tbl_entry { | |
198 | u32 cda; | |
199 | u32 prde_fis_len; | |
200 | u32 ttl; | |
201 | u32 desc_info; | |
202 | }; | |
203 | ||
204 | /* | |
205 | * Description information bitdefs | |
206 | */ | |
207 | enum { | |
208 | VENDOR_SPECIFIC_BIST = (1 << 10), | |
209 | CMD_DESC_SNOOP_ENABLE = (1 << 9), | |
210 | FPDMA_QUEUED_CMD = (1 << 8), | |
211 | SRST_CMD = (1 << 7), | |
212 | BIST = (1 << 6), | |
213 | ATAPI_CMD = (1 << 5), | |
214 | }; | |
215 | ||
216 | /* | |
217 | * Command Descriptor | |
218 | */ | |
219 | struct command_desc { | |
220 | u8 cfis[8 * 4]; | |
221 | u8 sfis[8 * 4]; | |
222 | u8 acmd[4 * 4]; | |
223 | u8 fill[4 * 4]; | |
224 | u32 prdt[SATA_FSL_MAX_PRD_DIRECT * 4]; | |
225 | u32 prdt_indirect[(SATA_FSL_MAX_PRD - SATA_FSL_MAX_PRD_DIRECT) * 4]; | |
226 | }; | |
227 | ||
228 | /* | |
229 | * Physical region table descriptor(PRD) | |
230 | */ | |
231 | ||
232 | struct prde { | |
233 | u32 dba; | |
234 | u8 fill[2 * 4]; | |
235 | u32 ddc_and_ext; | |
236 | }; | |
237 | ||
238 | /* | |
239 | * ata_port private data | |
240 | * This is our per-port instance data. | |
241 | */ | |
242 | struct sata_fsl_port_priv { | |
243 | struct cmdhdr_tbl_entry *cmdslot; | |
244 | dma_addr_t cmdslot_paddr; | |
245 | struct command_desc *cmdentry; | |
246 | dma_addr_t cmdentry_paddr; | |
247 | ||
248 | /* | |
249 | * SATA FSL controller has a Status FIS which should contain the | |
250 | * received D2H FIS & taskfile registers. This SFIS is present in | |
251 | * the command descriptor, and to have a ready reference to it, | |
252 | * we are caching it here, quite similar to what is done in H/W on | |
253 | * AHCI compliant devices by copying taskfile fields to a 32-bit | |
254 | * register. | |
255 | */ | |
256 | ||
257 | struct ata_taskfile tf; | |
258 | }; | |
259 | ||
260 | /* | |
261 | * ata_port->host_set private data | |
262 | */ | |
263 | struct sata_fsl_host_priv { | |
264 | void __iomem *hcr_base; | |
265 | void __iomem *ssr_base; | |
266 | void __iomem *csr_base; | |
79b3edc9 | 267 | int irq; |
faf0b2e5 LY |
268 | }; |
269 | ||
270 | static inline unsigned int sata_fsl_tag(unsigned int tag, | |
520d3a1a | 271 | void __iomem *hcr_base) |
faf0b2e5 LY |
272 | { |
273 | /* We let libATA core do actual (queue) tag allocation */ | |
274 | ||
275 | /* all non NCQ/queued commands should have tag#0 */ | |
276 | if (ata_tag_internal(tag)) { | |
277 | DPRINTK("mapping internal cmds to tag#0\n"); | |
278 | return 0; | |
279 | } | |
280 | ||
281 | if (unlikely(tag >= SATA_FSL_QUEUE_DEPTH)) { | |
282 | DPRINTK("tag %d invalid : out of range\n", tag); | |
283 | return 0; | |
284 | } | |
285 | ||
286 | if (unlikely((ioread32(hcr_base + CQ)) & (1 << tag))) { | |
287 | DPRINTK("tag %d invalid : in use!!\n", tag); | |
288 | return 0; | |
289 | } | |
290 | ||
291 | return tag; | |
292 | } | |
293 | ||
294 | static void sata_fsl_setup_cmd_hdr_entry(struct sata_fsl_port_priv *pp, | |
295 | unsigned int tag, u32 desc_info, | |
296 | u32 data_xfer_len, u8 num_prde, | |
297 | u8 fis_len) | |
298 | { | |
299 | dma_addr_t cmd_descriptor_address; | |
300 | ||
301 | cmd_descriptor_address = pp->cmdentry_paddr + | |
302 | tag * SATA_FSL_CMD_DESC_SIZE; | |
303 | ||
304 | /* NOTE: both data_xfer_len & fis_len are Dword counts */ | |
305 | ||
306 | pp->cmdslot[tag].cda = cpu_to_le32(cmd_descriptor_address); | |
307 | pp->cmdslot[tag].prde_fis_len = | |
308 | cpu_to_le32((num_prde << 16) | (fis_len << 2)); | |
309 | pp->cmdslot[tag].ttl = cpu_to_le32(data_xfer_len & ~0x03); | |
520d3a1a | 310 | pp->cmdslot[tag].desc_info = cpu_to_le32(desc_info | (tag & 0x1F)); |
faf0b2e5 LY |
311 | |
312 | VPRINTK("cda=0x%x, prde_fis_len=0x%x, ttl=0x%x, di=0x%x\n", | |
313 | pp->cmdslot[tag].cda, | |
314 | pp->cmdslot[tag].prde_fis_len, | |
315 | pp->cmdslot[tag].ttl, pp->cmdslot[tag].desc_info); | |
316 | ||
317 | } | |
318 | ||
319 | static unsigned int sata_fsl_fill_sg(struct ata_queued_cmd *qc, void *cmd_desc, | |
520d3a1a | 320 | u32 *ttl, dma_addr_t cmd_desc_paddr) |
faf0b2e5 LY |
321 | { |
322 | struct scatterlist *sg; | |
323 | unsigned int num_prde = 0; | |
324 | u32 ttl_dwords = 0; | |
325 | ||
326 | /* | |
327 | * NOTE : direct & indirect prdt's are contigiously allocated | |
328 | */ | |
329 | struct prde *prd = (struct prde *)&((struct command_desc *) | |
330 | cmd_desc)->prdt; | |
331 | ||
332 | struct prde *prd_ptr_to_indirect_ext = NULL; | |
333 | unsigned indirect_ext_segment_sz = 0; | |
334 | dma_addr_t indirect_ext_segment_paddr; | |
ff2aeb1e | 335 | unsigned int si; |
faf0b2e5 | 336 | |
b1f5dc48 | 337 | VPRINTK("SATA FSL : cd = 0x%p, prd = 0x%p\n", cmd_desc, prd); |
faf0b2e5 LY |
338 | |
339 | indirect_ext_segment_paddr = cmd_desc_paddr + | |
340 | SATA_FSL_CMD_DESC_OFFSET_TO_PRDT + SATA_FSL_MAX_PRD_DIRECT * 16; | |
341 | ||
ff2aeb1e | 342 | for_each_sg(qc->sg, sg, qc->n_elem, si) { |
faf0b2e5 LY |
343 | dma_addr_t sg_addr = sg_dma_address(sg); |
344 | u32 sg_len = sg_dma_len(sg); | |
345 | ||
346 | VPRINTK("SATA FSL : fill_sg, sg_addr = 0x%x, sg_len = %d\n", | |
347 | sg_addr, sg_len); | |
348 | ||
349 | /* warn if each s/g element is not dword aligned */ | |
350 | if (sg_addr & 0x03) | |
351 | ata_port_printk(qc->ap, KERN_ERR, | |
352 | "s/g addr unaligned : 0x%x\n", sg_addr); | |
353 | if (sg_len & 0x03) | |
354 | ata_port_printk(qc->ap, KERN_ERR, | |
355 | "s/g len unaligned : 0x%x\n", sg_len); | |
356 | ||
37198e30 JB |
357 | if (num_prde == (SATA_FSL_MAX_PRD_DIRECT - 1) && |
358 | sg_next(sg) != NULL) { | |
faf0b2e5 LY |
359 | VPRINTK("setting indirect prde\n"); |
360 | prd_ptr_to_indirect_ext = prd; | |
361 | prd->dba = cpu_to_le32(indirect_ext_segment_paddr); | |
362 | indirect_ext_segment_sz = 0; | |
363 | ++prd; | |
364 | ++num_prde; | |
365 | } | |
366 | ||
367 | ttl_dwords += sg_len; | |
368 | prd->dba = cpu_to_le32(sg_addr); | |
369 | prd->ddc_and_ext = | |
370 | cpu_to_le32(DATA_SNOOP_ENABLE | (sg_len & ~0x03)); | |
371 | ||
372 | VPRINTK("sg_fill, ttl=%d, dba=0x%x, ddc=0x%x\n", | |
373 | ttl_dwords, prd->dba, prd->ddc_and_ext); | |
374 | ||
375 | ++num_prde; | |
376 | ++prd; | |
377 | if (prd_ptr_to_indirect_ext) | |
378 | indirect_ext_segment_sz += sg_len; | |
379 | } | |
380 | ||
381 | if (prd_ptr_to_indirect_ext) { | |
382 | /* set indirect extension flag along with indirect ext. size */ | |
383 | prd_ptr_to_indirect_ext->ddc_and_ext = | |
384 | cpu_to_le32((EXT_INDIRECT_SEG_PRD_FLAG | | |
385 | DATA_SNOOP_ENABLE | | |
386 | (indirect_ext_segment_sz & ~0x03))); | |
387 | } | |
388 | ||
389 | *ttl = ttl_dwords; | |
390 | return num_prde; | |
391 | } | |
392 | ||
393 | static void sata_fsl_qc_prep(struct ata_queued_cmd *qc) | |
394 | { | |
395 | struct ata_port *ap = qc->ap; | |
396 | struct sata_fsl_port_priv *pp = ap->private_data; | |
397 | struct sata_fsl_host_priv *host_priv = ap->host->private_data; | |
398 | void __iomem *hcr_base = host_priv->hcr_base; | |
399 | unsigned int tag = sata_fsl_tag(qc->tag, hcr_base); | |
400 | struct command_desc *cd; | |
401 | u32 desc_info = CMD_DESC_SNOOP_ENABLE; | |
402 | u32 num_prde = 0; | |
403 | u32 ttl_dwords = 0; | |
404 | dma_addr_t cd_paddr; | |
405 | ||
406 | cd = (struct command_desc *)pp->cmdentry + tag; | |
407 | cd_paddr = pp->cmdentry_paddr + tag * SATA_FSL_CMD_DESC_SIZE; | |
408 | ||
520d3a1a | 409 | ata_tf_to_fis(&qc->tf, 0, 1, (u8 *) &cd->cfis); |
faf0b2e5 LY |
410 | |
411 | VPRINTK("Dumping cfis : 0x%x, 0x%x, 0x%x\n", | |
412 | cd->cfis[0], cd->cfis[1], cd->cfis[2]); | |
413 | ||
414 | if (qc->tf.protocol == ATA_PROT_NCQ) { | |
415 | VPRINTK("FPDMA xfer,Sctor cnt[0:7],[8:15] = %d,%d\n", | |
416 | cd->cfis[3], cd->cfis[11]); | |
417 | } | |
418 | ||
419 | /* setup "ACMD - atapi command" in cmd. desc. if this is ATAPI cmd */ | |
405e66b3 | 420 | if (ata_is_atapi(qc->tf.protocol)) { |
faf0b2e5 LY |
421 | desc_info |= ATAPI_CMD; |
422 | memset((void *)&cd->acmd, 0, 32); | |
423 | memcpy((void *)&cd->acmd, qc->cdb, qc->dev->cdb_len); | |
424 | } | |
425 | ||
426 | if (qc->flags & ATA_QCFLAG_DMAMAP) | |
427 | num_prde = sata_fsl_fill_sg(qc, (void *)cd, | |
428 | &ttl_dwords, cd_paddr); | |
429 | ||
430 | if (qc->tf.protocol == ATA_PROT_NCQ) | |
431 | desc_info |= FPDMA_QUEUED_CMD; | |
432 | ||
433 | sata_fsl_setup_cmd_hdr_entry(pp, tag, desc_info, ttl_dwords, | |
434 | num_prde, 5); | |
435 | ||
436 | VPRINTK("SATA FSL : xx_qc_prep, di = 0x%x, ttl = %d, num_prde = %d\n", | |
437 | desc_info, ttl_dwords, num_prde); | |
438 | } | |
439 | ||
440 | static unsigned int sata_fsl_qc_issue(struct ata_queued_cmd *qc) | |
441 | { | |
442 | struct ata_port *ap = qc->ap; | |
443 | struct sata_fsl_host_priv *host_priv = ap->host->private_data; | |
444 | void __iomem *hcr_base = host_priv->hcr_base; | |
445 | unsigned int tag = sata_fsl_tag(qc->tag, hcr_base); | |
446 | ||
447 | VPRINTK("xx_qc_issue called,CQ=0x%x,CA=0x%x,CE=0x%x,CC=0x%x\n", | |
448 | ioread32(CQ + hcr_base), | |
449 | ioread32(CA + hcr_base), | |
450 | ioread32(CE + hcr_base), ioread32(CC + hcr_base)); | |
451 | ||
452 | /* Simply queue command to the controller/device */ | |
453 | iowrite32(1 << tag, CQ + hcr_base); | |
454 | ||
455 | VPRINTK("xx_qc_issue called, tag=%d, CQ=0x%x, CA=0x%x\n", | |
456 | tag, ioread32(CQ + hcr_base), ioread32(CA + hcr_base)); | |
457 | ||
458 | VPRINTK("CE=0x%x, DE=0x%x, CC=0x%x, CmdStat = 0x%x\n", | |
459 | ioread32(CE + hcr_base), | |
460 | ioread32(DE + hcr_base), | |
b1f5dc48 AV |
461 | ioread32(CC + hcr_base), |
462 | ioread32(COMMANDSTAT + host_priv->csr_base)); | |
faf0b2e5 LY |
463 | |
464 | return 0; | |
465 | } | |
466 | ||
467 | static int sata_fsl_scr_write(struct ata_port *ap, unsigned int sc_reg_in, | |
468 | u32 val) | |
469 | { | |
470 | struct sata_fsl_host_priv *host_priv = ap->host->private_data; | |
471 | void __iomem *ssr_base = host_priv->ssr_base; | |
472 | unsigned int sc_reg; | |
473 | ||
474 | switch (sc_reg_in) { | |
475 | case SCR_STATUS: | |
faf0b2e5 | 476 | case SCR_ERROR: |
faf0b2e5 | 477 | case SCR_CONTROL: |
faf0b2e5 | 478 | case SCR_ACTIVE: |
9465d532 | 479 | sc_reg = sc_reg_in; |
faf0b2e5 LY |
480 | break; |
481 | default: | |
482 | return -EINVAL; | |
483 | } | |
484 | ||
485 | VPRINTK("xx_scr_write, reg_in = %d\n", sc_reg); | |
486 | ||
2a52e8d4 | 487 | iowrite32(val, ssr_base + (sc_reg * 4)); |
faf0b2e5 LY |
488 | return 0; |
489 | } | |
490 | ||
491 | static int sata_fsl_scr_read(struct ata_port *ap, unsigned int sc_reg_in, | |
492 | u32 *val) | |
493 | { | |
494 | struct sata_fsl_host_priv *host_priv = ap->host->private_data; | |
495 | void __iomem *ssr_base = host_priv->ssr_base; | |
496 | unsigned int sc_reg; | |
497 | ||
498 | switch (sc_reg_in) { | |
499 | case SCR_STATUS: | |
faf0b2e5 | 500 | case SCR_ERROR: |
faf0b2e5 | 501 | case SCR_CONTROL: |
faf0b2e5 | 502 | case SCR_ACTIVE: |
9465d532 | 503 | sc_reg = sc_reg_in; |
faf0b2e5 LY |
504 | break; |
505 | default: | |
506 | return -EINVAL; | |
507 | } | |
508 | ||
509 | VPRINTK("xx_scr_read, reg_in = %d\n", sc_reg); | |
510 | ||
2a52e8d4 | 511 | *val = ioread32(ssr_base + (sc_reg * 4)); |
faf0b2e5 LY |
512 | return 0; |
513 | } | |
514 | ||
515 | static void sata_fsl_freeze(struct ata_port *ap) | |
516 | { | |
517 | struct sata_fsl_host_priv *host_priv = ap->host->private_data; | |
518 | void __iomem *hcr_base = host_priv->hcr_base; | |
519 | u32 temp; | |
520 | ||
521 | VPRINTK("xx_freeze, CQ=0x%x, CA=0x%x, CE=0x%x, DE=0x%x\n", | |
522 | ioread32(CQ + hcr_base), | |
523 | ioread32(CA + hcr_base), | |
524 | ioread32(CE + hcr_base), ioread32(DE + hcr_base)); | |
b1f5dc48 AV |
525 | VPRINTK("CmdStat = 0x%x\n", |
526 | ioread32(host_priv->csr_base + COMMANDSTAT)); | |
faf0b2e5 LY |
527 | |
528 | /* disable interrupts on the controller/port */ | |
529 | temp = ioread32(hcr_base + HCONTROL); | |
530 | iowrite32((temp & ~0x3F), hcr_base + HCONTROL); | |
531 | ||
532 | VPRINTK("in xx_freeze : HControl = 0x%x, HStatus = 0x%x\n", | |
533 | ioread32(hcr_base + HCONTROL), ioread32(hcr_base + HSTATUS)); | |
534 | } | |
535 | ||
536 | static void sata_fsl_thaw(struct ata_port *ap) | |
537 | { | |
538 | struct sata_fsl_host_priv *host_priv = ap->host->private_data; | |
539 | void __iomem *hcr_base = host_priv->hcr_base; | |
540 | u32 temp; | |
541 | ||
542 | /* ack. any pending IRQs for this controller/port */ | |
543 | temp = ioread32(hcr_base + HSTATUS); | |
544 | ||
545 | VPRINTK("xx_thaw, pending IRQs = 0x%x\n", (temp & 0x3F)); | |
546 | ||
547 | if (temp & 0x3F) | |
548 | iowrite32((temp & 0x3F), hcr_base + HSTATUS); | |
549 | ||
550 | /* enable interrupts on the controller/port */ | |
551 | temp = ioread32(hcr_base + HCONTROL); | |
552 | iowrite32((temp | DEFAULT_PORT_IRQ_ENABLE_MASK), hcr_base + HCONTROL); | |
553 | ||
554 | VPRINTK("xx_thaw : HControl = 0x%x, HStatus = 0x%x\n", | |
555 | ioread32(hcr_base + HCONTROL), ioread32(hcr_base + HSTATUS)); | |
556 | } | |
557 | ||
558 | /* | |
559 | * NOTE : 1st D2H FIS from device does not update sfis in command descriptor. | |
560 | */ | |
561 | static inline void sata_fsl_cache_taskfile_from_d2h_fis(struct ata_queued_cmd | |
562 | *qc, | |
563 | struct ata_port *ap) | |
564 | { | |
565 | struct sata_fsl_port_priv *pp = ap->private_data; | |
faf0b2e5 LY |
566 | struct sata_fsl_host_priv *host_priv = ap->host->private_data; |
567 | void __iomem *hcr_base = host_priv->hcr_base; | |
568 | unsigned int tag = sata_fsl_tag(qc->tag, hcr_base); | |
569 | struct command_desc *cd; | |
570 | ||
571 | cd = pp->cmdentry + tag; | |
572 | ||
25ce945a | 573 | ata_tf_from_fis(cd->sfis, &pp->tf); |
faf0b2e5 LY |
574 | } |
575 | ||
576 | static u8 sata_fsl_check_status(struct ata_port *ap) | |
577 | { | |
578 | struct sata_fsl_port_priv *pp = ap->private_data; | |
579 | ||
580 | return pp->tf.command; | |
581 | } | |
582 | ||
583 | static void sata_fsl_tf_read(struct ata_port *ap, struct ata_taskfile *tf) | |
584 | { | |
585 | struct sata_fsl_port_priv *pp = ap->private_data; | |
586 | ||
587 | *tf = pp->tf; | |
588 | } | |
589 | ||
590 | static int sata_fsl_port_start(struct ata_port *ap) | |
591 | { | |
592 | struct device *dev = ap->host->dev; | |
593 | struct sata_fsl_port_priv *pp; | |
594 | int retval; | |
595 | void *mem; | |
596 | dma_addr_t mem_dma; | |
597 | struct sata_fsl_host_priv *host_priv = ap->host->private_data; | |
598 | void __iomem *hcr_base = host_priv->hcr_base; | |
599 | u32 temp; | |
600 | ||
601 | pp = kzalloc(sizeof(*pp), GFP_KERNEL); | |
602 | if (!pp) | |
603 | return -ENOMEM; | |
604 | ||
faf0b2e5 LY |
605 | mem = dma_alloc_coherent(dev, SATA_FSL_PORT_PRIV_DMA_SZ, &mem_dma, |
606 | GFP_KERNEL); | |
607 | if (!mem) { | |
faf0b2e5 LY |
608 | kfree(pp); |
609 | return -ENOMEM; | |
610 | } | |
611 | memset(mem, 0, SATA_FSL_PORT_PRIV_DMA_SZ); | |
612 | ||
613 | pp->cmdslot = mem; | |
614 | pp->cmdslot_paddr = mem_dma; | |
615 | ||
616 | mem += SATA_FSL_CMD_SLOT_SIZE; | |
617 | mem_dma += SATA_FSL_CMD_SLOT_SIZE; | |
618 | ||
619 | pp->cmdentry = mem; | |
620 | pp->cmdentry_paddr = mem_dma; | |
621 | ||
622 | ap->private_data = pp; | |
623 | ||
624 | VPRINTK("CHBA = 0x%x, cmdentry_phys = 0x%x\n", | |
625 | pp->cmdslot_paddr, pp->cmdentry_paddr); | |
626 | ||
627 | /* Now, update the CHBA register in host controller cmd register set */ | |
628 | iowrite32(pp->cmdslot_paddr & 0xffffffff, hcr_base + CHBA); | |
629 | ||
630 | /* | |
631 | * Now, we can bring the controller on-line & also initiate | |
632 | * the COMINIT sequence, we simply return here and the boot-probing | |
633 | * & device discovery process is re-initiated by libATA using a | |
634 | * Softreset EH (dummy) session. Hence, boot probing and device | |
635 | * discovey will be part of sata_fsl_softreset() callback. | |
636 | */ | |
637 | ||
638 | temp = ioread32(hcr_base + HCONTROL); | |
639 | iowrite32((temp | HCONTROL_ONLINE_PHY_RST), hcr_base + HCONTROL); | |
640 | ||
641 | VPRINTK("HStatus = 0x%x\n", ioread32(hcr_base + HSTATUS)); | |
642 | VPRINTK("HControl = 0x%x\n", ioread32(hcr_base + HCONTROL)); | |
643 | VPRINTK("CHBA = 0x%x\n", ioread32(hcr_base + CHBA)); | |
644 | ||
e7eac96e | 645 | #ifdef CONFIG_MPC8315_DS |
faf0b2e5 LY |
646 | /* |
647 | * Workaround for 8315DS board 3gbps link-up issue, | |
648 | * currently limit SATA port to GEN1 speed | |
649 | */ | |
650 | sata_fsl_scr_read(ap, SCR_CONTROL, &temp); | |
651 | temp &= ~(0xF << 4); | |
652 | temp |= (0x1 << 4); | |
653 | sata_fsl_scr_write(ap, SCR_CONTROL, temp); | |
654 | ||
655 | sata_fsl_scr_read(ap, SCR_CONTROL, &temp); | |
656 | dev_printk(KERN_WARNING, dev, "scr_control, speed limited to %x\n", | |
657 | temp); | |
e7eac96e | 658 | #endif |
faf0b2e5 LY |
659 | |
660 | return 0; | |
661 | } | |
662 | ||
663 | static void sata_fsl_port_stop(struct ata_port *ap) | |
664 | { | |
665 | struct device *dev = ap->host->dev; | |
666 | struct sata_fsl_port_priv *pp = ap->private_data; | |
667 | struct sata_fsl_host_priv *host_priv = ap->host->private_data; | |
668 | void __iomem *hcr_base = host_priv->hcr_base; | |
669 | u32 temp; | |
670 | ||
671 | /* | |
672 | * Force host controller to go off-line, aborting current operations | |
673 | */ | |
674 | temp = ioread32(hcr_base + HCONTROL); | |
675 | temp &= ~HCONTROL_ONLINE_PHY_RST; | |
676 | temp |= HCONTROL_FORCE_OFFLINE; | |
677 | iowrite32(temp, hcr_base + HCONTROL); | |
678 | ||
679 | /* Poll for controller to go offline - should happen immediately */ | |
680 | ata_wait_register(hcr_base + HSTATUS, ONLINE, ONLINE, 1, 1); | |
681 | ||
682 | ap->private_data = NULL; | |
683 | dma_free_coherent(dev, SATA_FSL_PORT_PRIV_DMA_SZ, | |
684 | pp->cmdslot, pp->cmdslot_paddr); | |
685 | ||
faf0b2e5 LY |
686 | kfree(pp); |
687 | } | |
688 | ||
689 | static unsigned int sata_fsl_dev_classify(struct ata_port *ap) | |
690 | { | |
691 | struct sata_fsl_host_priv *host_priv = ap->host->private_data; | |
692 | void __iomem *hcr_base = host_priv->hcr_base; | |
693 | struct ata_taskfile tf; | |
694 | u32 temp; | |
695 | ||
696 | temp = ioread32(hcr_base + SIGNATURE); | |
697 | ||
698 | VPRINTK("raw sig = 0x%x\n", temp); | |
699 | VPRINTK("HStatus = 0x%x\n", ioread32(hcr_base + HSTATUS)); | |
700 | VPRINTK("HControl = 0x%x\n", ioread32(hcr_base + HCONTROL)); | |
701 | ||
702 | tf.lbah = (temp >> 24) & 0xff; | |
703 | tf.lbam = (temp >> 16) & 0xff; | |
704 | tf.lbal = (temp >> 8) & 0xff; | |
705 | tf.nsect = temp & 0xff; | |
706 | ||
707 | return ata_dev_classify(&tf); | |
708 | } | |
709 | ||
1bf617b7 | 710 | static int sata_fsl_softreset(struct ata_link *link, unsigned int *class, |
faf0b2e5 LY |
711 | unsigned long deadline) |
712 | { | |
1bf617b7 | 713 | struct ata_port *ap = link->ap; |
faf0b2e5 LY |
714 | struct sata_fsl_port_priv *pp = ap->private_data; |
715 | struct sata_fsl_host_priv *host_priv = ap->host->private_data; | |
716 | void __iomem *hcr_base = host_priv->hcr_base; | |
717 | u32 temp; | |
718 | struct ata_taskfile tf; | |
719 | u8 *cfis; | |
720 | u32 Serror; | |
721 | int i = 0; | |
faf0b2e5 LY |
722 | unsigned long start_jiffies; |
723 | ||
724 | DPRINTK("in xx_softreset\n"); | |
725 | ||
726 | try_offline_again: | |
727 | /* | |
728 | * Force host controller to go off-line, aborting current operations | |
729 | */ | |
730 | temp = ioread32(hcr_base + HCONTROL); | |
731 | temp &= ~HCONTROL_ONLINE_PHY_RST; | |
732 | iowrite32(temp, hcr_base + HCONTROL); | |
733 | ||
734 | /* Poll for controller to go offline */ | |
735 | temp = ata_wait_register(hcr_base + HSTATUS, ONLINE, ONLINE, 1, 500); | |
736 | ||
737 | if (temp & ONLINE) { | |
738 | ata_port_printk(ap, KERN_ERR, | |
739 | "Softreset failed, not off-lined %d\n", i); | |
740 | ||
741 | /* | |
742 | * Try to offline controller atleast twice | |
743 | */ | |
744 | i++; | |
745 | if (i == 2) | |
746 | goto err; | |
747 | else | |
748 | goto try_offline_again; | |
749 | } | |
750 | ||
751 | DPRINTK("softreset, controller off-lined\n"); | |
752 | VPRINTK("HStatus = 0x%x\n", ioread32(hcr_base + HSTATUS)); | |
753 | VPRINTK("HControl = 0x%x\n", ioread32(hcr_base + HCONTROL)); | |
754 | ||
755 | /* | |
756 | * PHY reset should remain asserted for atleast 1ms | |
757 | */ | |
758 | msleep(1); | |
759 | ||
760 | /* | |
761 | * Now, bring the host controller online again, this can take time | |
762 | * as PHY reset and communication establishment, 1st D2H FIS and | |
763 | * device signature update is done, on safe side assume 500ms | |
764 | * NOTE : Host online status may be indicated immediately!! | |
765 | */ | |
766 | ||
767 | temp = ioread32(hcr_base + HCONTROL); | |
768 | temp |= (HCONTROL_ONLINE_PHY_RST | HCONTROL_SNOOP_ENABLE); | |
769 | iowrite32(temp, hcr_base + HCONTROL); | |
770 | ||
771 | temp = ata_wait_register(hcr_base + HSTATUS, ONLINE, 0, 1, 500); | |
772 | ||
773 | if (!(temp & ONLINE)) { | |
774 | ata_port_printk(ap, KERN_ERR, | |
775 | "Softreset failed, not on-lined\n"); | |
776 | goto err; | |
777 | } | |
778 | ||
779 | DPRINTK("softreset, controller off-lined & on-lined\n"); | |
780 | VPRINTK("HStatus = 0x%x\n", ioread32(hcr_base + HSTATUS)); | |
781 | VPRINTK("HControl = 0x%x\n", ioread32(hcr_base + HCONTROL)); | |
782 | ||
783 | /* | |
784 | * First, wait for the PHYRDY change to occur before waiting for | |
785 | * the signature, and also verify if SStatus indicates device | |
786 | * presence | |
787 | */ | |
788 | ||
789 | temp = ata_wait_register(hcr_base + HSTATUS, 0xFF, 0, 1, 500); | |
1bf617b7 | 790 | if ((!(temp & 0x10)) || ata_link_offline(link)) { |
faf0b2e5 LY |
791 | ata_port_printk(ap, KERN_WARNING, |
792 | "No Device OR PHYRDY change,Hstatus = 0x%x\n", | |
793 | ioread32(hcr_base + HSTATUS)); | |
794 | goto err; | |
795 | } | |
796 | ||
797 | /* | |
798 | * Wait for the first D2H from device,i.e,signature update notification | |
799 | */ | |
800 | start_jiffies = jiffies; | |
801 | temp = ata_wait_register(hcr_base + HSTATUS, 0xFF, 0x10, | |
802 | 500, jiffies_to_msecs(deadline - start_jiffies)); | |
803 | ||
804 | if ((temp & 0xFF) != 0x18) { | |
805 | ata_port_printk(ap, KERN_WARNING, "No Signature Update\n"); | |
806 | goto err; | |
807 | } else { | |
808 | ata_port_printk(ap, KERN_INFO, | |
809 | "Signature Update detected @ %d msecs\n", | |
810 | jiffies_to_msecs(jiffies - start_jiffies)); | |
811 | } | |
812 | ||
813 | /* | |
814 | * Send a device reset (SRST) explicitly on command slot #0 | |
815 | * Check : will the command queue (reg) be cleared during offlining ?? | |
816 | * Also we will be online only if Phy commn. has been established | |
817 | * and device presence has been detected, therefore if we have | |
818 | * reached here, we can send a command to the target device | |
819 | */ | |
820 | ||
faf0b2e5 LY |
821 | DPRINTK("Sending SRST/device reset\n"); |
822 | ||
1bf617b7 | 823 | ata_tf_init(link->device, &tf); |
520d3a1a | 824 | cfis = (u8 *) &pp->cmdentry->cfis; |
faf0b2e5 LY |
825 | |
826 | /* device reset/SRST is a control register update FIS, uses tag0 */ | |
827 | sata_fsl_setup_cmd_hdr_entry(pp, 0, | |
828 | SRST_CMD | CMD_DESC_SNOOP_ENABLE, 0, 0, 5); | |
829 | ||
830 | tf.ctl |= ATA_SRST; /* setup SRST bit in taskfile control reg */ | |
831 | ata_tf_to_fis(&tf, 0, 0, cfis); | |
832 | ||
833 | DPRINTK("Dumping cfis : 0x%x, 0x%x, 0x%x, 0x%x\n", | |
834 | cfis[0], cfis[1], cfis[2], cfis[3]); | |
835 | ||
836 | /* | |
837 | * Queue SRST command to the controller/device, ensure that no | |
838 | * other commands are active on the controller/device | |
839 | */ | |
840 | ||
841 | DPRINTK("@Softreset, CQ = 0x%x, CA = 0x%x, CC = 0x%x\n", | |
842 | ioread32(CQ + hcr_base), | |
843 | ioread32(CA + hcr_base), ioread32(CC + hcr_base)); | |
844 | ||
845 | iowrite32(0xFFFF, CC + hcr_base); | |
846 | iowrite32(1, CQ + hcr_base); | |
847 | ||
848 | temp = ata_wait_register(CQ + hcr_base, 0x1, 0x1, 1, 5000); | |
849 | if (temp & 0x1) { | |
850 | ata_port_printk(ap, KERN_WARNING, "ATA_SRST issue failed\n"); | |
851 | ||
852 | DPRINTK("Softreset@5000,CQ=0x%x,CA=0x%x,CC=0x%x\n", | |
853 | ioread32(CQ + hcr_base), | |
854 | ioread32(CA + hcr_base), ioread32(CC + hcr_base)); | |
855 | ||
856 | sata_fsl_scr_read(ap, SCR_ERROR, &Serror); | |
857 | ||
858 | DPRINTK("HStatus = 0x%x\n", ioread32(hcr_base + HSTATUS)); | |
859 | DPRINTK("HControl = 0x%x\n", ioread32(hcr_base + HCONTROL)); | |
860 | DPRINTK("Serror = 0x%x\n", Serror); | |
861 | goto err; | |
862 | } | |
863 | ||
864 | msleep(1); | |
865 | ||
866 | /* | |
867 | * SATA device enters reset state after receving a Control register | |
868 | * FIS with SRST bit asserted and it awaits another H2D Control reg. | |
869 | * FIS with SRST bit cleared, then the device does internal diags & | |
870 | * initialization, followed by indicating it's initialization status | |
871 | * using ATA signature D2H register FIS to the host controller. | |
872 | */ | |
873 | ||
874 | sata_fsl_setup_cmd_hdr_entry(pp, 0, CMD_DESC_SNOOP_ENABLE, 0, 0, 5); | |
875 | ||
876 | tf.ctl &= ~ATA_SRST; /* 2nd H2D Ctl. register FIS */ | |
877 | ata_tf_to_fis(&tf, 0, 0, cfis); | |
878 | ||
879 | iowrite32(1, CQ + hcr_base); | |
880 | msleep(150); /* ?? */ | |
881 | ||
882 | /* | |
883 | * The above command would have signalled an interrupt on command | |
884 | * complete, which needs special handling, by clearing the Nth | |
885 | * command bit of the CCreg | |
886 | */ | |
887 | iowrite32(0x01, CC + hcr_base); /* We know it will be cmd#0 always */ | |
faf0b2e5 LY |
888 | |
889 | DPRINTK("SATA FSL : Now checking device signature\n"); | |
890 | ||
891 | *class = ATA_DEV_NONE; | |
892 | ||
893 | /* Verify if SStatus indicates device presence */ | |
1bf617b7 | 894 | if (ata_link_online(link)) { |
faf0b2e5 LY |
895 | /* |
896 | * if we are here, device presence has been detected, | |
897 | * 1st D2H FIS would have been received, but sfis in | |
898 | * command desc. is not updated, but signature register | |
899 | * would have been updated | |
900 | */ | |
901 | ||
902 | *class = sata_fsl_dev_classify(ap); | |
903 | ||
904 | DPRINTK("class = %d\n", *class); | |
905 | VPRINTK("ccreg = 0x%x\n", ioread32(hcr_base + CC)); | |
906 | VPRINTK("cereg = 0x%x\n", ioread32(hcr_base + CE)); | |
907 | } | |
908 | ||
909 | return 0; | |
910 | ||
911 | err: | |
912 | return -EIO; | |
913 | } | |
914 | ||
faf0b2e5 LY |
915 | static void sata_fsl_error_handler(struct ata_port *ap) |
916 | { | |
917 | ||
918 | DPRINTK("in xx_error_handler\n"); | |
919 | ||
920 | /* perform recovery */ | |
066ce4db | 921 | ata_do_eh(ap, ata_std_prereset, sata_fsl_softreset, sata_std_hardreset, |
faf0b2e5 LY |
922 | ata_std_postreset); |
923 | } | |
924 | ||
925 | static void sata_fsl_post_internal_cmd(struct ata_queued_cmd *qc) | |
926 | { | |
927 | if (qc->flags & ATA_QCFLAG_FAILED) | |
928 | qc->err_mask |= AC_ERR_OTHER; | |
929 | ||
930 | if (qc->err_mask) { | |
931 | /* make DMA engine forget about the failed command */ | |
932 | ||
933 | } | |
934 | } | |
935 | ||
faf0b2e5 LY |
936 | static void sata_fsl_error_intr(struct ata_port *ap) |
937 | { | |
1bf617b7 LY |
938 | struct ata_link *link = &ap->link; |
939 | struct ata_eh_info *ehi = &link->eh_info; | |
faf0b2e5 LY |
940 | struct sata_fsl_host_priv *host_priv = ap->host->private_data; |
941 | void __iomem *hcr_base = host_priv->hcr_base; | |
942 | u32 hstatus, dereg, cereg = 0, SError = 0; | |
943 | unsigned int err_mask = 0, action = 0; | |
944 | struct ata_queued_cmd *qc; | |
945 | int freeze = 0; | |
946 | ||
947 | hstatus = ioread32(hcr_base + HSTATUS); | |
948 | cereg = ioread32(hcr_base + CE); | |
949 | ||
950 | ata_ehi_clear_desc(ehi); | |
951 | ||
952 | /* | |
953 | * Handle & Clear SError | |
954 | */ | |
955 | ||
956 | sata_fsl_scr_read(ap, SCR_ERROR, &SError); | |
957 | if (unlikely(SError & 0xFFFF0000)) { | |
958 | sata_fsl_scr_write(ap, SCR_ERROR, SError); | |
959 | err_mask |= AC_ERR_ATA_BUS; | |
960 | } | |
961 | ||
962 | DPRINTK("error_intr,hStat=0x%x,CE=0x%x,DE =0x%x,SErr=0x%x\n", | |
963 | hstatus, cereg, ioread32(hcr_base + DE), SError); | |
964 | ||
965 | /* handle single device errors */ | |
966 | if (cereg) { | |
967 | /* | |
968 | * clear the command error, also clears queue to the device | |
969 | * in error, and we can (re)issue commands to this device. | |
970 | * When a device is in error all commands queued into the | |
971 | * host controller and at the device are considered aborted | |
972 | * and the queue for that device is stopped. Now, after | |
973 | * clearing the device error, we can issue commands to the | |
974 | * device to interrogate it to find the source of the error. | |
975 | */ | |
976 | dereg = ioread32(hcr_base + DE); | |
977 | iowrite32(dereg, hcr_base + DE); | |
978 | iowrite32(cereg, hcr_base + CE); | |
979 | ||
980 | DPRINTK("single device error, CE=0x%x, DE=0x%x\n", | |
981 | ioread32(hcr_base + CE), ioread32(hcr_base + DE)); | |
982 | /* | |
983 | * We should consider this as non fatal error, and TF must | |
984 | * be updated as done below. | |
985 | */ | |
986 | ||
987 | err_mask |= AC_ERR_DEV; | |
988 | } | |
989 | ||
990 | /* handle fatal errors */ | |
991 | if (hstatus & FATAL_ERROR_DECODE) { | |
992 | err_mask |= AC_ERR_ATA_BUS; | |
cf480626 | 993 | action |= ATA_EH_RESET; |
faf0b2e5 LY |
994 | /* how will fatal error interrupts be completed ?? */ |
995 | freeze = 1; | |
996 | } | |
997 | ||
998 | /* Handle PHYRDY change notification */ | |
999 | if (hstatus & INT_ON_PHYRDY_CHG) { | |
1000 | DPRINTK("SATA FSL: PHYRDY change indication\n"); | |
1001 | ||
1002 | /* Setup a soft-reset EH action */ | |
1003 | ata_ehi_hotplugged(ehi); | |
1004 | freeze = 1; | |
1005 | } | |
1006 | ||
1007 | /* record error info */ | |
1bf617b7 | 1008 | qc = ata_qc_from_tag(ap, link->active_tag); |
faf0b2e5 LY |
1009 | |
1010 | if (qc) { | |
1011 | sata_fsl_cache_taskfile_from_d2h_fis(qc, qc->ap); | |
1012 | qc->err_mask |= err_mask; | |
1013 | } else | |
1014 | ehi->err_mask |= err_mask; | |
1015 | ||
1016 | ehi->action |= action; | |
1017 | ehi->serror |= SError; | |
1018 | ||
1019 | /* freeze or abort */ | |
1020 | if (freeze) | |
1021 | ata_port_freeze(ap); | |
1022 | else | |
1023 | ata_port_abort(ap); | |
1024 | } | |
1025 | ||
1026 | static void sata_fsl_qc_complete(struct ata_queued_cmd *qc) | |
1027 | { | |
1028 | if (qc->flags & ATA_QCFLAG_RESULT_TF) { | |
1029 | DPRINTK("xx_qc_complete called\n"); | |
1030 | sata_fsl_cache_taskfile_from_d2h_fis(qc, qc->ap); | |
1031 | } | |
1032 | } | |
1033 | ||
1034 | static void sata_fsl_host_intr(struct ata_port *ap) | |
1035 | { | |
1bf617b7 | 1036 | struct ata_link *link = &ap->link; |
faf0b2e5 LY |
1037 | struct sata_fsl_host_priv *host_priv = ap->host->private_data; |
1038 | void __iomem *hcr_base = host_priv->hcr_base; | |
1039 | u32 hstatus, qc_active = 0; | |
1040 | struct ata_queued_cmd *qc; | |
1041 | u32 SError; | |
1042 | ||
1043 | hstatus = ioread32(hcr_base + HSTATUS); | |
1044 | ||
1045 | sata_fsl_scr_read(ap, SCR_ERROR, &SError); | |
1046 | ||
1047 | if (unlikely(SError & 0xFFFF0000)) { | |
1048 | DPRINTK("serror @host_intr : 0x%x\n", SError); | |
1049 | sata_fsl_error_intr(ap); | |
1050 | ||
1051 | } | |
1052 | ||
1053 | if (unlikely(hstatus & INT_ON_ERROR)) { | |
1054 | DPRINTK("error interrupt!!\n"); | |
1055 | sata_fsl_error_intr(ap); | |
1056 | return; | |
1057 | } | |
1058 | ||
1bf617b7 | 1059 | if (link->sactive) { /* only true for NCQ commands */ |
faf0b2e5 LY |
1060 | int i; |
1061 | /* Read command completed register */ | |
1062 | qc_active = ioread32(hcr_base + CC); | |
1063 | /* clear CC bit, this will also complete the interrupt */ | |
1064 | iowrite32(qc_active, hcr_base + CC); | |
1065 | ||
1066 | DPRINTK("Status of all queues :\n"); | |
1067 | DPRINTK("qc_active/CC = 0x%x, CA = 0x%x, CE=0x%x\n", | |
1068 | qc_active, ioread32(hcr_base + CA), | |
1069 | ioread32(hcr_base + CE)); | |
1070 | ||
1071 | for (i = 0; i < SATA_FSL_QUEUE_DEPTH; i++) { | |
1072 | if (qc_active & (1 << i)) { | |
1073 | qc = ata_qc_from_tag(ap, i); | |
1074 | if (qc) { | |
1075 | sata_fsl_qc_complete(qc); | |
1076 | ata_qc_complete(qc); | |
1077 | } | |
1078 | DPRINTK | |
1079 | ("completing ncq cmd,tag=%d,CC=0x%x,CA=0x%x\n", | |
1080 | i, ioread32(hcr_base + CC), | |
1081 | ioread32(hcr_base + CA)); | |
1082 | } | |
1083 | } | |
1084 | return; | |
1085 | ||
1086 | } else if (ap->qc_active) { | |
1087 | iowrite32(1, hcr_base + CC); | |
1bf617b7 | 1088 | qc = ata_qc_from_tag(ap, link->active_tag); |
faf0b2e5 LY |
1089 | |
1090 | DPRINTK("completing non-ncq cmd, tag=%d,CC=0x%x\n", | |
1bf617b7 | 1091 | link->active_tag, ioread32(hcr_base + CC)); |
faf0b2e5 LY |
1092 | |
1093 | if (qc) { | |
1094 | sata_fsl_qc_complete(qc); | |
1095 | ata_qc_complete(qc); | |
1096 | } | |
1097 | } else { | |
1098 | /* Spurious Interrupt!! */ | |
1099 | DPRINTK("spurious interrupt!!, CC = 0x%x\n", | |
1100 | ioread32(hcr_base + CC)); | |
1101 | return; | |
1102 | } | |
1103 | } | |
1104 | ||
1105 | static irqreturn_t sata_fsl_interrupt(int irq, void *dev_instance) | |
1106 | { | |
1107 | struct ata_host *host = dev_instance; | |
1108 | struct sata_fsl_host_priv *host_priv = host->private_data; | |
1109 | void __iomem *hcr_base = host_priv->hcr_base; | |
1110 | u32 interrupt_enables; | |
1111 | unsigned handled = 0; | |
1112 | struct ata_port *ap; | |
1113 | ||
1114 | /* ack. any pending IRQs for this controller/port */ | |
1115 | interrupt_enables = ioread32(hcr_base + HSTATUS); | |
1116 | interrupt_enables &= 0x3F; | |
1117 | ||
1118 | DPRINTK("interrupt status 0x%x\n", interrupt_enables); | |
1119 | ||
1120 | if (!interrupt_enables) | |
1121 | return IRQ_NONE; | |
1122 | ||
1123 | spin_lock(&host->lock); | |
1124 | ||
1125 | /* Assuming one port per host controller */ | |
1126 | ||
1127 | ap = host->ports[0]; | |
1128 | if (ap) { | |
1129 | sata_fsl_host_intr(ap); | |
1130 | } else { | |
1131 | dev_printk(KERN_WARNING, host->dev, | |
1132 | "interrupt on disabled port 0\n"); | |
1133 | } | |
1134 | ||
1135 | iowrite32(interrupt_enables, hcr_base + HSTATUS); | |
1136 | handled = 1; | |
1137 | ||
1138 | spin_unlock(&host->lock); | |
1139 | ||
1140 | return IRQ_RETVAL(handled); | |
1141 | } | |
1142 | ||
1143 | /* | |
1144 | * Multiple ports are represented by multiple SATA controllers with | |
1145 | * one port per controller | |
1146 | */ | |
1147 | static int sata_fsl_init_controller(struct ata_host *host) | |
1148 | { | |
1149 | struct sata_fsl_host_priv *host_priv = host->private_data; | |
1150 | void __iomem *hcr_base = host_priv->hcr_base; | |
1151 | u32 temp; | |
1152 | ||
1153 | /* | |
1154 | * NOTE : We cannot bring the controller online before setting | |
1155 | * the CHBA, hence main controller initialization is done as | |
1156 | * part of the port_start() callback | |
1157 | */ | |
1158 | ||
1159 | /* ack. any pending IRQs for this controller/port */ | |
1160 | temp = ioread32(hcr_base + HSTATUS); | |
1161 | if (temp & 0x3F) | |
1162 | iowrite32((temp & 0x3F), hcr_base + HSTATUS); | |
1163 | ||
1164 | /* Keep interrupts disabled on the controller */ | |
1165 | temp = ioread32(hcr_base + HCONTROL); | |
1166 | iowrite32((temp & ~0x3F), hcr_base + HCONTROL); | |
1167 | ||
1168 | /* Disable interrupt coalescing control(icc), for the moment */ | |
1169 | DPRINTK("icc = 0x%x\n", ioread32(hcr_base + ICC)); | |
1170 | iowrite32(0x01000000, hcr_base + ICC); | |
1171 | ||
1172 | /* clear error registers, SError is cleared by libATA */ | |
1173 | iowrite32(0x00000FFFF, hcr_base + CE); | |
1174 | iowrite32(0x00000FFFF, hcr_base + DE); | |
1175 | ||
1176 | /* initially assuming no Port multiplier, set CQPMP to 0 */ | |
1177 | iowrite32(0x0, hcr_base + CQPMP); | |
1178 | ||
1179 | /* | |
1180 | * host controller will be brought on-line, during xx_port_start() | |
1181 | * callback, that should also initiate the OOB, COMINIT sequence | |
1182 | */ | |
1183 | ||
1184 | DPRINTK("HStatus = 0x%x\n", ioread32(hcr_base + HSTATUS)); | |
1185 | DPRINTK("HControl = 0x%x\n", ioread32(hcr_base + HCONTROL)); | |
1186 | ||
1187 | return 0; | |
1188 | } | |
1189 | ||
1190 | /* | |
1191 | * scsi mid-layer and libata interface structures | |
1192 | */ | |
1193 | static struct scsi_host_template sata_fsl_sht = { | |
68d1d07b | 1194 | ATA_NCQ_SHT("sata_fsl"), |
faf0b2e5 | 1195 | .can_queue = SATA_FSL_QUEUE_DEPTH, |
faf0b2e5 | 1196 | .sg_tablesize = SATA_FSL_MAX_PRD_USABLE, |
faf0b2e5 | 1197 | .dma_boundary = ATA_DMA_BOUNDARY, |
faf0b2e5 LY |
1198 | }; |
1199 | ||
1200 | static const struct ata_port_operations sata_fsl_ops = { | |
029cfd6b TH |
1201 | .inherits = &sata_port_ops, |
1202 | ||
faf0b2e5 LY |
1203 | .check_status = sata_fsl_check_status, |
1204 | .check_altstatus = sata_fsl_check_status, | |
faf0b2e5 LY |
1205 | |
1206 | .tf_read = sata_fsl_tf_read, | |
1207 | ||
1208 | .qc_prep = sata_fsl_qc_prep, | |
1209 | .qc_issue = sata_fsl_qc_issue, | |
faf0b2e5 LY |
1210 | |
1211 | .scr_read = sata_fsl_scr_read, | |
1212 | .scr_write = sata_fsl_scr_write, | |
1213 | ||
1214 | .freeze = sata_fsl_freeze, | |
1215 | .thaw = sata_fsl_thaw, | |
1216 | .error_handler = sata_fsl_error_handler, | |
1217 | .post_internal_cmd = sata_fsl_post_internal_cmd, | |
1218 | ||
1219 | .port_start = sata_fsl_port_start, | |
1220 | .port_stop = sata_fsl_port_stop, | |
1221 | }; | |
1222 | ||
1223 | static const struct ata_port_info sata_fsl_port_info[] = { | |
1224 | { | |
1225 | .flags = SATA_FSL_HOST_FLAGS, | |
1226 | .pio_mask = 0x1f, /* pio 0-4 */ | |
1227 | .udma_mask = 0x7f, /* udma 0-6 */ | |
1228 | .port_ops = &sata_fsl_ops, | |
1229 | }, | |
1230 | }; | |
1231 | ||
1232 | static int sata_fsl_probe(struct of_device *ofdev, | |
1233 | const struct of_device_id *match) | |
1234 | { | |
1235 | int retval = 0; | |
1236 | void __iomem *hcr_base = NULL; | |
1237 | void __iomem *ssr_base = NULL; | |
1238 | void __iomem *csr_base = NULL; | |
1239 | struct sata_fsl_host_priv *host_priv = NULL; | |
faf0b2e5 LY |
1240 | int irq; |
1241 | struct ata_host *host; | |
1242 | ||
1243 | struct ata_port_info pi = sata_fsl_port_info[0]; | |
1244 | const struct ata_port_info *ppi[] = { &pi, NULL }; | |
1245 | ||
1246 | dev_printk(KERN_INFO, &ofdev->dev, | |
1247 | "Sata FSL Platform/CSB Driver init\n"); | |
1248 | ||
faf0b2e5 LY |
1249 | hcr_base = of_iomap(ofdev->node, 0); |
1250 | if (!hcr_base) | |
1251 | goto error_exit_with_cleanup; | |
1252 | ||
1253 | ssr_base = hcr_base + 0x100; | |
1254 | csr_base = hcr_base + 0x140; | |
1255 | ||
1256 | DPRINTK("@reset i/o = 0x%x\n", ioread32(csr_base + TRANSCFG)); | |
1257 | DPRINTK("sizeof(cmd_desc) = %d\n", sizeof(struct command_desc)); | |
1258 | DPRINTK("sizeof(#define cmd_desc) = %d\n", SATA_FSL_CMD_DESC_SIZE); | |
1259 | ||
1260 | host_priv = kzalloc(sizeof(struct sata_fsl_host_priv), GFP_KERNEL); | |
1261 | if (!host_priv) | |
1262 | goto error_exit_with_cleanup; | |
1263 | ||
1264 | host_priv->hcr_base = hcr_base; | |
1265 | host_priv->ssr_base = ssr_base; | |
1266 | host_priv->csr_base = csr_base; | |
1267 | ||
1268 | irq = irq_of_parse_and_map(ofdev->node, 0); | |
1269 | if (irq < 0) { | |
1270 | dev_printk(KERN_ERR, &ofdev->dev, "invalid irq from platform\n"); | |
1271 | goto error_exit_with_cleanup; | |
1272 | } | |
79b3edc9 | 1273 | host_priv->irq = irq; |
faf0b2e5 LY |
1274 | |
1275 | /* allocate host structure */ | |
1276 | host = ata_host_alloc_pinfo(&ofdev->dev, ppi, SATA_FSL_MAX_PORTS); | |
1277 | ||
1278 | /* host->iomap is not used currently */ | |
1279 | host->private_data = host_priv; | |
1280 | ||
1281 | /* setup port(s) */ | |
1282 | ||
1283 | host->ports[0]->ioaddr.cmd_addr = host_priv->hcr_base; | |
1284 | host->ports[0]->ioaddr.scr_addr = host_priv->ssr_base; | |
1285 | ||
1286 | /* initialize host controller */ | |
1287 | sata_fsl_init_controller(host); | |
1288 | ||
1289 | /* | |
1290 | * Now, register with libATA core, this will also initiate the | |
1291 | * device discovery process, invoking our port_start() handler & | |
1292 | * error_handler() to execute a dummy Softreset EH session | |
1293 | */ | |
1294 | ata_host_activate(host, irq, sata_fsl_interrupt, SATA_FSL_IRQ_FLAG, | |
1295 | &sata_fsl_sht); | |
1296 | ||
1297 | dev_set_drvdata(&ofdev->dev, host); | |
1298 | ||
1299 | return 0; | |
1300 | ||
1301 | error_exit_with_cleanup: | |
1302 | ||
1303 | if (hcr_base) | |
1304 | iounmap(hcr_base); | |
1305 | if (host_priv) | |
1306 | kfree(host_priv); | |
1307 | ||
1308 | return retval; | |
1309 | } | |
1310 | ||
1311 | static int sata_fsl_remove(struct of_device *ofdev) | |
1312 | { | |
1313 | struct ata_host *host = dev_get_drvdata(&ofdev->dev); | |
1314 | struct sata_fsl_host_priv *host_priv = host->private_data; | |
1315 | ||
1316 | ata_host_detach(host); | |
1317 | ||
1318 | dev_set_drvdata(&ofdev->dev, NULL); | |
1319 | ||
79b3edc9 | 1320 | irq_dispose_mapping(host_priv->irq); |
faf0b2e5 LY |
1321 | iounmap(host_priv->hcr_base); |
1322 | kfree(host_priv); | |
1323 | ||
1324 | return 0; | |
1325 | } | |
1326 | ||
1327 | static struct of_device_id fsl_sata_match[] = { | |
1328 | { | |
96ce1b6d | 1329 | .compatible = "fsl,pq-sata", |
faf0b2e5 LY |
1330 | }, |
1331 | {}, | |
1332 | }; | |
1333 | ||
1334 | MODULE_DEVICE_TABLE(of, fsl_sata_match); | |
1335 | ||
1336 | static struct of_platform_driver fsl_sata_driver = { | |
1337 | .name = "fsl-sata", | |
1338 | .match_table = fsl_sata_match, | |
1339 | .probe = sata_fsl_probe, | |
1340 | .remove = sata_fsl_remove, | |
1341 | }; | |
1342 | ||
1343 | static int __init sata_fsl_init(void) | |
1344 | { | |
1345 | of_register_platform_driver(&fsl_sata_driver); | |
1346 | return 0; | |
1347 | } | |
1348 | ||
1349 | static void __exit sata_fsl_exit(void) | |
1350 | { | |
1351 | of_unregister_platform_driver(&fsl_sata_driver); | |
1352 | } | |
1353 | ||
1354 | MODULE_LICENSE("GPL"); | |
1355 | MODULE_AUTHOR("Ashish Kalra, Freescale Semiconductor"); | |
1356 | MODULE_DESCRIPTION("Freescale 3.0Gbps SATA controller low level driver"); | |
1357 | MODULE_VERSION("1.10"); | |
1358 | ||
1359 | module_init(sata_fsl_init); | |
1360 | module_exit(sata_fsl_exit); |