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81d01bfa LH |
1 | /* |
2 | * AppliedMicro X-Gene SoC SATA Host Controller Driver | |
3 | * | |
4 | * Copyright (c) 2014, Applied Micro Circuits Corporation | |
5 | * Author: Loc Ho <lho@apm.com> | |
6 | * Tuan Phan <tphan@apm.com> | |
7 | * Suman Tripathi <stripathi@apm.com> | |
8 | * | |
9 | * This program is free software; you can redistribute it and/or modify it | |
10 | * under the terms of the GNU General Public License as published by the | |
11 | * Free Software Foundation; either version 2 of the License, or (at your | |
12 | * option) any later version. | |
13 | * | |
14 | * This program is distributed in the hope that it will be useful, | |
15 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
17 | * GNU General Public License for more details. | |
18 | * | |
19 | * You should have received a copy of the GNU General Public License | |
20 | * along with this program. If not, see <http://www.gnu.org/licenses/>. | |
21 | * | |
22 | * NOTE: PM support is not currently available. | |
23 | * | |
24 | */ | |
25 | #include <linux/module.h> | |
26 | #include <linux/platform_device.h> | |
27 | #include <linux/ahci_platform.h> | |
28 | #include <linux/of_address.h> | |
29 | #include <linux/of_irq.h> | |
30 | #include <linux/phy/phy.h> | |
31 | #include "ahci.h" | |
32 | ||
33 | /* Max # of disk per a controller */ | |
34 | #define MAX_AHCI_CHN_PERCTR 2 | |
35 | ||
36 | /* MUX CSR */ | |
37 | #define SATA_ENET_CONFIG_REG 0x00000000 | |
38 | #define CFG_SATA_ENET_SELECT_MASK 0x00000001 | |
39 | ||
40 | /* SATA core host controller CSR */ | |
41 | #define SLVRDERRATTRIBUTES 0x00000000 | |
42 | #define SLVWRERRATTRIBUTES 0x00000004 | |
43 | #define MSTRDERRATTRIBUTES 0x00000008 | |
44 | #define MSTWRERRATTRIBUTES 0x0000000c | |
45 | #define BUSCTLREG 0x00000014 | |
46 | #define IOFMSTRWAUX 0x00000018 | |
47 | #define INTSTATUSMASK 0x0000002c | |
48 | #define ERRINTSTATUS 0x00000030 | |
49 | #define ERRINTSTATUSMASK 0x00000034 | |
50 | ||
51 | /* SATA host AHCI CSR */ | |
52 | #define PORTCFG 0x000000a4 | |
53 | #define PORTADDR_SET(dst, src) \ | |
54 | (((dst) & ~0x0000003f) | (((u32)(src)) & 0x0000003f)) | |
55 | #define PORTPHY1CFG 0x000000a8 | |
56 | #define PORTPHY1CFG_FRCPHYRDY_SET(dst, src) \ | |
57 | (((dst) & ~0x00100000) | (((u32)(src) << 0x14) & 0x00100000)) | |
58 | #define PORTPHY2CFG 0x000000ac | |
59 | #define PORTPHY3CFG 0x000000b0 | |
60 | #define PORTPHY4CFG 0x000000b4 | |
61 | #define PORTPHY5CFG 0x000000b8 | |
62 | #define SCTL0 0x0000012C | |
63 | #define PORTPHY5CFG_RTCHG_SET(dst, src) \ | |
64 | (((dst) & ~0xfff00000) | (((u32)(src) << 0x14) & 0xfff00000)) | |
65 | #define PORTAXICFG_EN_CONTEXT_SET(dst, src) \ | |
66 | (((dst) & ~0x01000000) | (((u32)(src) << 0x18) & 0x01000000)) | |
67 | #define PORTAXICFG 0x000000bc | |
68 | #define PORTAXICFG_OUTTRANS_SET(dst, src) \ | |
69 | (((dst) & ~0x00f00000) | (((u32)(src) << 0x14) & 0x00f00000)) | |
aeae4dca ST |
70 | #define PORTRANSCFG 0x000000c8 |
71 | #define PORTRANSCFG_RXWM_SET(dst, src) \ | |
72 | (((dst) & ~0x0000007f) | (((u32)(src)) & 0x0000007f)) | |
81d01bfa LH |
73 | |
74 | /* SATA host controller AXI CSR */ | |
75 | #define INT_SLV_TMOMASK 0x00000010 | |
76 | ||
77 | /* SATA diagnostic CSR */ | |
78 | #define CFG_MEM_RAM_SHUTDOWN 0x00000070 | |
79 | #define BLOCK_MEM_RDY 0x00000074 | |
80 | ||
0babe614 ST |
81 | /* Max retry for link down */ |
82 | #define MAX_LINK_DOWN_RETRY 3 | |
83 | ||
81d01bfa LH |
84 | struct xgene_ahci_context { |
85 | struct ahci_host_priv *hpriv; | |
86 | struct device *dev; | |
2a0bdff6 | 87 | u8 last_cmd[MAX_AHCI_CHN_PERCTR]; /* tracking the last command issued*/ |
81d01bfa LH |
88 | void __iomem *csr_core; /* Core CSR address of IP */ |
89 | void __iomem *csr_diag; /* Diag CSR address of IP */ | |
90 | void __iomem *csr_axi; /* AXI CSR address of IP */ | |
91 | void __iomem *csr_mux; /* MUX CSR address of IP */ | |
92 | }; | |
93 | ||
94 | static int xgene_ahci_init_memram(struct xgene_ahci_context *ctx) | |
95 | { | |
96 | dev_dbg(ctx->dev, "Release memory from shutdown\n"); | |
97 | writel(0x0, ctx->csr_diag + CFG_MEM_RAM_SHUTDOWN); | |
98 | readl(ctx->csr_diag + CFG_MEM_RAM_SHUTDOWN); /* Force a barrier */ | |
99 | msleep(1); /* reset may take up to 1ms */ | |
100 | if (readl(ctx->csr_diag + BLOCK_MEM_RDY) != 0xFFFFFFFF) { | |
101 | dev_err(ctx->dev, "failed to release memory from shutdown\n"); | |
102 | return -ENODEV; | |
103 | } | |
104 | return 0; | |
105 | } | |
106 | ||
2a0bdff6 ST |
107 | /** |
108 | * xgene_ahci_restart_engine - Restart the dma engine. | |
109 | * @ap : ATA port of interest | |
110 | * | |
111 | * Restarts the dma engine inside the controller. | |
112 | */ | |
113 | static int xgene_ahci_restart_engine(struct ata_port *ap) | |
114 | { | |
115 | struct ahci_host_priv *hpriv = ap->host->private_data; | |
116 | ||
117 | ahci_stop_engine(ap); | |
118 | ahci_start_fis_rx(ap); | |
119 | hpriv->start_engine(ap); | |
120 | ||
121 | return 0; | |
122 | } | |
123 | ||
124 | /** | |
125 | * xgene_ahci_qc_issue - Issue commands to the device | |
126 | * @qc: Command to issue | |
127 | * | |
128 | * Due to Hardware errata for IDENTIFY DEVICE command, the controller cannot | |
129 | * clear the BSY bit after receiving the PIO setup FIS. This results in the dma | |
130 | * state machine goes into the CMFatalErrorUpdate state and locks up. By | |
131 | * restarting the dma engine, it removes the controller out of lock up state. | |
132 | */ | |
133 | static unsigned int xgene_ahci_qc_issue(struct ata_queued_cmd *qc) | |
134 | { | |
135 | struct ata_port *ap = qc->ap; | |
136 | struct ahci_host_priv *hpriv = ap->host->private_data; | |
137 | struct xgene_ahci_context *ctx = hpriv->plat_data; | |
138 | int rc = 0; | |
139 | ||
140 | if (unlikely(ctx->last_cmd[ap->port_no] == ATA_CMD_ID_ATA)) | |
141 | xgene_ahci_restart_engine(ap); | |
142 | ||
143 | rc = ahci_qc_issue(qc); | |
144 | ||
145 | /* Save the last command issued */ | |
146 | ctx->last_cmd[ap->port_no] = qc->tf.command; | |
147 | ||
148 | return rc; | |
149 | } | |
150 | ||
0bed13be ST |
151 | static bool xgene_ahci_is_memram_inited(struct xgene_ahci_context *ctx) |
152 | { | |
153 | void __iomem *diagcsr = ctx->csr_diag; | |
154 | ||
155 | return (readl(diagcsr + CFG_MEM_RAM_SHUTDOWN) == 0 && | |
156 | readl(diagcsr + BLOCK_MEM_RDY) == 0xFFFFFFFF); | |
157 | } | |
158 | ||
81d01bfa LH |
159 | /** |
160 | * xgene_ahci_read_id - Read ID data from the specified device | |
161 | * @dev: device | |
162 | * @tf: proposed taskfile | |
163 | * @id: data buffer | |
164 | * | |
165 | * This custom read ID function is required due to the fact that the HW | |
2a0bdff6 | 166 | * does not support DEVSLP. |
81d01bfa LH |
167 | */ |
168 | static unsigned int xgene_ahci_read_id(struct ata_device *dev, | |
169 | struct ata_taskfile *tf, u16 *id) | |
170 | { | |
171 | u32 err_mask; | |
81d01bfa LH |
172 | |
173 | err_mask = ata_do_dev_read_id(dev, tf, id); | |
174 | if (err_mask) | |
175 | return err_mask; | |
176 | ||
177 | /* | |
178 | * Mask reserved area. Word78 spec of Link Power Management | |
179 | * bit15-8: reserved | |
180 | * bit7: NCQ autosence | |
181 | * bit6: Software settings preservation supported | |
182 | * bit5: reserved | |
183 | * bit4: In-order sata delivery supported | |
184 | * bit3: DIPM requests supported | |
185 | * bit2: DMA Setup FIS Auto-Activate optimization supported | |
186 | * bit1: DMA Setup FIX non-Zero buffer offsets supported | |
187 | * bit0: Reserved | |
188 | * | |
189 | * Clear reserved bit 8 (DEVSLP bit) as we don't support DEVSLP | |
190 | */ | |
5c0b8e0d | 191 | id[ATA_ID_FEATURE_SUPP] &= cpu_to_le16(~(1 << 8)); |
81d01bfa | 192 | |
81d01bfa LH |
193 | return 0; |
194 | } | |
195 | ||
196 | static void xgene_ahci_set_phy_cfg(struct xgene_ahci_context *ctx, int channel) | |
197 | { | |
198 | void __iomem *mmio = ctx->hpriv->mmio; | |
199 | u32 val; | |
200 | ||
201 | dev_dbg(ctx->dev, "port configure mmio 0x%p channel %d\n", | |
202 | mmio, channel); | |
203 | val = readl(mmio + PORTCFG); | |
204 | val = PORTADDR_SET(val, channel == 0 ? 2 : 3); | |
205 | writel(val, mmio + PORTCFG); | |
206 | readl(mmio + PORTCFG); /* Force a barrier */ | |
207 | /* Disable fix rate */ | |
208 | writel(0x0001fffe, mmio + PORTPHY1CFG); | |
209 | readl(mmio + PORTPHY1CFG); /* Force a barrier */ | |
0185b1b7 | 210 | writel(0x28183219, mmio + PORTPHY2CFG); |
81d01bfa | 211 | readl(mmio + PORTPHY2CFG); /* Force a barrier */ |
0185b1b7 | 212 | writel(0x13081008, mmio + PORTPHY3CFG); |
81d01bfa | 213 | readl(mmio + PORTPHY3CFG); /* Force a barrier */ |
0185b1b7 | 214 | writel(0x00480815, mmio + PORTPHY4CFG); |
81d01bfa LH |
215 | readl(mmio + PORTPHY4CFG); /* Force a barrier */ |
216 | /* Set window negotiation */ | |
217 | val = readl(mmio + PORTPHY5CFG); | |
218 | val = PORTPHY5CFG_RTCHG_SET(val, 0x300); | |
219 | writel(val, mmio + PORTPHY5CFG); | |
220 | readl(mmio + PORTPHY5CFG); /* Force a barrier */ | |
221 | val = readl(mmio + PORTAXICFG); | |
222 | val = PORTAXICFG_EN_CONTEXT_SET(val, 0x1); /* Enable context mgmt */ | |
223 | val = PORTAXICFG_OUTTRANS_SET(val, 0xe); /* Set outstanding */ | |
224 | writel(val, mmio + PORTAXICFG); | |
225 | readl(mmio + PORTAXICFG); /* Force a barrier */ | |
aeae4dca ST |
226 | /* Set the watermark threshold of the receive FIFO */ |
227 | val = readl(mmio + PORTRANSCFG); | |
228 | val = PORTRANSCFG_RXWM_SET(val, 0x30); | |
229 | writel(val, mmio + PORTRANSCFG); | |
81d01bfa LH |
230 | } |
231 | ||
232 | /** | |
233 | * xgene_ahci_do_hardreset - Issue the actual COMRESET | |
234 | * @link: link to reset | |
235 | * @deadline: deadline jiffies for the operation | |
236 | * @online: Return value to indicate if device online | |
237 | * | |
238 | * Due to the limitation of the hardware PHY, a difference set of setting is | |
239 | * required for each supported disk speed - Gen3 (6.0Gbps), Gen2 (3.0Gbps), | |
240 | * and Gen1 (1.5Gbps). Otherwise during long IO stress test, the PHY will | |
241 | * report disparity error and etc. In addition, during COMRESET, there can | |
242 | * be error reported in the register PORT_SCR_ERR. For SERR_DISPARITY and | |
0babe614 ST |
243 | * SERR_10B_8B_ERR, the PHY receiver line must be reseted. Also during long |
244 | * reboot cycle regression, sometimes the PHY reports link down even if the | |
245 | * device is present because of speed negotiation failure. so need to retry | |
246 | * the COMRESET to get the link up. The following algorithm is followed to | |
247 | * proper configure the hardware PHY during COMRESET: | |
81d01bfa LH |
248 | * |
249 | * Alg Part 1: | |
250 | * 1. Start the PHY at Gen3 speed (default setting) | |
251 | * 2. Issue the COMRESET | |
252 | * 3. If no link, go to Alg Part 3 | |
253 | * 4. If link up, determine if the negotiated speed matches the PHY | |
254 | * configured speed | |
255 | * 5. If they matched, go to Alg Part 2 | |
256 | * 6. If they do not matched and first time, configure the PHY for the linked | |
257 | * up disk speed and repeat step 2 | |
258 | * 7. Go to Alg Part 2 | |
259 | * | |
260 | * Alg Part 2: | |
261 | * 1. On link up, if there are any SERR_DISPARITY and SERR_10B_8B_ERR error | |
262 | * reported in the register PORT_SCR_ERR, then reset the PHY receiver line | |
0babe614 | 263 | * 2. Go to Alg Part 4 |
81d01bfa LH |
264 | * |
265 | * Alg Part 3: | |
0babe614 ST |
266 | * 1. Check the PORT_SCR_STAT to see whether device presence detected but PHY |
267 | * communication establishment failed and maximum link down attempts are | |
268 | * less than Max attempts 3 then goto Alg Part 1. | |
269 | * 2. Go to Alg Part 4. | |
270 | * | |
271 | * Alg Part 4: | |
81d01bfa LH |
272 | * 1. Clear any pending from register PORT_SCR_ERR. |
273 | * | |
274 | * NOTE: For the initial version, we will NOT support Gen1/Gen2. In addition | |
275 | * and until the underlying PHY supports an method to reset the receiver | |
276 | * line, on detection of SERR_DISPARITY or SERR_10B_8B_ERR errors, | |
277 | * an warning message will be printed. | |
278 | */ | |
279 | static int xgene_ahci_do_hardreset(struct ata_link *link, | |
280 | unsigned long deadline, bool *online) | |
281 | { | |
282 | const unsigned long *timing = sata_ehc_deb_timing(&link->eh_context); | |
283 | struct ata_port *ap = link->ap; | |
284 | struct ahci_host_priv *hpriv = ap->host->private_data; | |
285 | struct xgene_ahci_context *ctx = hpriv->plat_data; | |
286 | struct ahci_port_priv *pp = ap->private_data; | |
287 | u8 *d2h_fis = pp->rx_fis + RX_FIS_D2H_REG; | |
288 | void __iomem *port_mmio = ahci_port_base(ap); | |
289 | struct ata_taskfile tf; | |
0babe614 | 290 | int link_down_retry = 0; |
81d01bfa | 291 | int rc; |
0babe614 | 292 | u32 val, sstatus; |
81d01bfa | 293 | |
0babe614 ST |
294 | do { |
295 | /* clear D2H reception area to properly wait for D2H FIS */ | |
296 | ata_tf_init(link->device, &tf); | |
297 | tf.command = ATA_BUSY; | |
298 | ata_tf_to_fis(&tf, 0, 0, d2h_fis); | |
299 | rc = sata_link_hardreset(link, timing, deadline, online, | |
81d01bfa | 300 | ahci_check_ready); |
0babe614 ST |
301 | if (*online) { |
302 | val = readl(port_mmio + PORT_SCR_ERR); | |
303 | if (val & (SERR_DISPARITY | SERR_10B_8B_ERR)) | |
304 | dev_warn(ctx->dev, "link has error\n"); | |
305 | break; | |
306 | } | |
81d01bfa | 307 | |
0babe614 ST |
308 | sata_scr_read(link, SCR_STATUS, &sstatus); |
309 | } while (link_down_retry++ < MAX_LINK_DOWN_RETRY && | |
310 | (sstatus & 0xff) == 0x1); | |
81d01bfa LH |
311 | |
312 | /* clear all errors if any pending */ | |
313 | val = readl(port_mmio + PORT_SCR_ERR); | |
314 | writel(val, port_mmio + PORT_SCR_ERR); | |
315 | ||
316 | return rc; | |
317 | } | |
318 | ||
319 | static int xgene_ahci_hardreset(struct ata_link *link, unsigned int *class, | |
320 | unsigned long deadline) | |
321 | { | |
322 | struct ata_port *ap = link->ap; | |
323 | struct ahci_host_priv *hpriv = ap->host->private_data; | |
324 | void __iomem *port_mmio = ahci_port_base(ap); | |
325 | bool online; | |
326 | int rc; | |
327 | u32 portcmd_saved; | |
328 | u32 portclb_saved; | |
329 | u32 portclbhi_saved; | |
330 | u32 portrxfis_saved; | |
331 | u32 portrxfishi_saved; | |
332 | ||
333 | /* As hardreset resets these CSR, save it to restore later */ | |
334 | portcmd_saved = readl(port_mmio + PORT_CMD); | |
335 | portclb_saved = readl(port_mmio + PORT_LST_ADDR); | |
336 | portclbhi_saved = readl(port_mmio + PORT_LST_ADDR_HI); | |
337 | portrxfis_saved = readl(port_mmio + PORT_FIS_ADDR); | |
338 | portrxfishi_saved = readl(port_mmio + PORT_FIS_ADDR_HI); | |
339 | ||
340 | ahci_stop_engine(ap); | |
341 | ||
342 | rc = xgene_ahci_do_hardreset(link, deadline, &online); | |
343 | ||
344 | /* As controller hardreset clears them, restore them */ | |
345 | writel(portcmd_saved, port_mmio + PORT_CMD); | |
346 | writel(portclb_saved, port_mmio + PORT_LST_ADDR); | |
347 | writel(portclbhi_saved, port_mmio + PORT_LST_ADDR_HI); | |
348 | writel(portrxfis_saved, port_mmio + PORT_FIS_ADDR); | |
349 | writel(portrxfishi_saved, port_mmio + PORT_FIS_ADDR_HI); | |
350 | ||
351 | hpriv->start_engine(ap); | |
352 | ||
353 | if (online) | |
354 | *class = ahci_dev_classify(ap); | |
355 | ||
356 | return rc; | |
357 | } | |
358 | ||
359 | static void xgene_ahci_host_stop(struct ata_host *host) | |
360 | { | |
361 | struct ahci_host_priv *hpriv = host->private_data; | |
362 | ||
363 | ahci_platform_disable_resources(hpriv); | |
364 | } | |
365 | ||
366 | static struct ata_port_operations xgene_ahci_ops = { | |
367 | .inherits = &ahci_ops, | |
368 | .host_stop = xgene_ahci_host_stop, | |
369 | .hardreset = xgene_ahci_hardreset, | |
370 | .read_id = xgene_ahci_read_id, | |
2a0bdff6 | 371 | .qc_issue = xgene_ahci_qc_issue, |
81d01bfa LH |
372 | }; |
373 | ||
374 | static const struct ata_port_info xgene_ahci_port_info = { | |
72f79f9e | 375 | .flags = AHCI_FLAG_COMMON, |
81d01bfa LH |
376 | .pio_mask = ATA_PIO4, |
377 | .udma_mask = ATA_UDMA6, | |
378 | .port_ops = &xgene_ahci_ops, | |
379 | }; | |
380 | ||
381 | static int xgene_ahci_hw_init(struct ahci_host_priv *hpriv) | |
382 | { | |
383 | struct xgene_ahci_context *ctx = hpriv->plat_data; | |
384 | int i; | |
385 | int rc; | |
386 | u32 val; | |
387 | ||
388 | /* Remove IP RAM out of shutdown */ | |
389 | rc = xgene_ahci_init_memram(ctx); | |
390 | if (rc) | |
391 | return rc; | |
392 | ||
393 | for (i = 0; i < MAX_AHCI_CHN_PERCTR; i++) | |
394 | xgene_ahci_set_phy_cfg(ctx, i); | |
395 | ||
396 | /* AXI disable Mask */ | |
397 | writel(0xffffffff, hpriv->mmio + HOST_IRQ_STAT); | |
398 | readl(hpriv->mmio + HOST_IRQ_STAT); /* Force a barrier */ | |
399 | writel(0, ctx->csr_core + INTSTATUSMASK); | |
6a96918a | 400 | val = readl(ctx->csr_core + INTSTATUSMASK); /* Force a barrier */ |
81d01bfa LH |
401 | dev_dbg(ctx->dev, "top level interrupt mask 0x%X value 0x%08X\n", |
402 | INTSTATUSMASK, val); | |
403 | ||
404 | writel(0x0, ctx->csr_core + ERRINTSTATUSMASK); | |
405 | readl(ctx->csr_core + ERRINTSTATUSMASK); /* Force a barrier */ | |
406 | writel(0x0, ctx->csr_axi + INT_SLV_TMOMASK); | |
407 | readl(ctx->csr_axi + INT_SLV_TMOMASK); | |
408 | ||
409 | /* Enable AXI Interrupt */ | |
410 | writel(0xffffffff, ctx->csr_core + SLVRDERRATTRIBUTES); | |
411 | writel(0xffffffff, ctx->csr_core + SLVWRERRATTRIBUTES); | |
412 | writel(0xffffffff, ctx->csr_core + MSTRDERRATTRIBUTES); | |
413 | writel(0xffffffff, ctx->csr_core + MSTWRERRATTRIBUTES); | |
414 | ||
415 | /* Enable coherency */ | |
416 | val = readl(ctx->csr_core + BUSCTLREG); | |
417 | val &= ~0x00000002; /* Enable write coherency */ | |
418 | val &= ~0x00000001; /* Enable read coherency */ | |
419 | writel(val, ctx->csr_core + BUSCTLREG); | |
420 | ||
421 | val = readl(ctx->csr_core + IOFMSTRWAUX); | |
422 | val |= (1 << 3); /* Enable read coherency */ | |
423 | val |= (1 << 9); /* Enable write coherency */ | |
424 | writel(val, ctx->csr_core + IOFMSTRWAUX); | |
425 | val = readl(ctx->csr_core + IOFMSTRWAUX); | |
426 | dev_dbg(ctx->dev, "coherency 0x%X value 0x%08X\n", | |
427 | IOFMSTRWAUX, val); | |
428 | ||
429 | return rc; | |
430 | } | |
431 | ||
432 | static int xgene_ahci_mux_select(struct xgene_ahci_context *ctx) | |
433 | { | |
434 | u32 val; | |
435 | ||
436 | /* Check for optional MUX resource */ | |
a77b6ee9 | 437 | if (!ctx->csr_mux) |
81d01bfa LH |
438 | return 0; |
439 | ||
440 | val = readl(ctx->csr_mux + SATA_ENET_CONFIG_REG); | |
441 | val &= ~CFG_SATA_ENET_SELECT_MASK; | |
442 | writel(val, ctx->csr_mux + SATA_ENET_CONFIG_REG); | |
443 | val = readl(ctx->csr_mux + SATA_ENET_CONFIG_REG); | |
444 | return val & CFG_SATA_ENET_SELECT_MASK ? -1 : 0; | |
445 | } | |
446 | ||
447 | static int xgene_ahci_probe(struct platform_device *pdev) | |
448 | { | |
449 | struct device *dev = &pdev->dev; | |
450 | struct ahci_host_priv *hpriv; | |
451 | struct xgene_ahci_context *ctx; | |
452 | struct resource *res; | |
453 | int rc; | |
454 | ||
455 | hpriv = ahci_platform_get_resources(pdev); | |
456 | if (IS_ERR(hpriv)) | |
457 | return PTR_ERR(hpriv); | |
458 | ||
459 | ctx = devm_kzalloc(dev, sizeof(*ctx), GFP_KERNEL); | |
460 | if (!ctx) | |
461 | return -ENOMEM; | |
462 | ||
463 | hpriv->plat_data = ctx; | |
464 | ctx->hpriv = hpriv; | |
465 | ctx->dev = dev; | |
466 | ||
467 | /* Retrieve the IP core resource */ | |
468 | res = platform_get_resource(pdev, IORESOURCE_MEM, 1); | |
469 | ctx->csr_core = devm_ioremap_resource(dev, res); | |
470 | if (IS_ERR(ctx->csr_core)) | |
471 | return PTR_ERR(ctx->csr_core); | |
472 | ||
473 | /* Retrieve the IP diagnostic resource */ | |
474 | res = platform_get_resource(pdev, IORESOURCE_MEM, 2); | |
475 | ctx->csr_diag = devm_ioremap_resource(dev, res); | |
476 | if (IS_ERR(ctx->csr_diag)) | |
477 | return PTR_ERR(ctx->csr_diag); | |
478 | ||
479 | /* Retrieve the IP AXI resource */ | |
480 | res = platform_get_resource(pdev, IORESOURCE_MEM, 3); | |
481 | ctx->csr_axi = devm_ioremap_resource(dev, res); | |
482 | if (IS_ERR(ctx->csr_axi)) | |
483 | return PTR_ERR(ctx->csr_axi); | |
484 | ||
485 | /* Retrieve the optional IP mux resource */ | |
486 | res = platform_get_resource(pdev, IORESOURCE_MEM, 4); | |
a77b6ee9 ST |
487 | if (res) { |
488 | void __iomem *csr = devm_ioremap_resource(dev, res); | |
489 | if (IS_ERR(csr)) | |
490 | return PTR_ERR(csr); | |
491 | ||
492 | ctx->csr_mux = csr; | |
493 | } | |
81d01bfa LH |
494 | |
495 | dev_dbg(dev, "VAddr 0x%p Mmio VAddr 0x%p\n", ctx->csr_core, | |
496 | hpriv->mmio); | |
497 | ||
498 | /* Select ATA */ | |
499 | if ((rc = xgene_ahci_mux_select(ctx))) { | |
500 | dev_err(dev, "SATA mux selection failed error %d\n", rc); | |
501 | return -ENODEV; | |
502 | } | |
503 | ||
0bed13be ST |
504 | if (xgene_ahci_is_memram_inited(ctx)) { |
505 | dev_info(dev, "skip clock and PHY initialization\n"); | |
506 | goto skip_clk_phy; | |
507 | } | |
508 | ||
81d01bfa LH |
509 | /* Due to errata, HW requires full toggle transition */ |
510 | rc = ahci_platform_enable_clks(hpriv); | |
511 | if (rc) | |
512 | goto disable_resources; | |
513 | ahci_platform_disable_clks(hpriv); | |
514 | ||
515 | rc = ahci_platform_enable_resources(hpriv); | |
516 | if (rc) | |
517 | goto disable_resources; | |
518 | ||
519 | /* Configure the host controller */ | |
520 | xgene_ahci_hw_init(hpriv); | |
0bed13be | 521 | skip_clk_phy: |
72f79f9e | 522 | hpriv->flags = AHCI_HFLAG_NO_PMP | AHCI_HFLAG_NO_NCQ; |
f9f36917 | 523 | |
725c7b57 | 524 | rc = ahci_platform_init_host(pdev, hpriv, &xgene_ahci_port_info); |
81d01bfa LH |
525 | if (rc) |
526 | goto disable_resources; | |
527 | ||
528 | dev_dbg(dev, "X-Gene SATA host controller initialized\n"); | |
529 | return 0; | |
530 | ||
531 | disable_resources: | |
532 | ahci_platform_disable_resources(hpriv); | |
533 | return rc; | |
534 | } | |
535 | ||
536 | static const struct of_device_id xgene_ahci_of_match[] = { | |
537 | {.compatible = "apm,xgene-ahci"}, | |
538 | {}, | |
539 | }; | |
540 | MODULE_DEVICE_TABLE(of, xgene_ahci_of_match); | |
541 | ||
542 | static struct platform_driver xgene_ahci_driver = { | |
543 | .probe = xgene_ahci_probe, | |
544 | .remove = ata_platform_remove_one, | |
545 | .driver = { | |
546 | .name = "xgene-ahci", | |
81d01bfa LH |
547 | .of_match_table = xgene_ahci_of_match, |
548 | }, | |
549 | }; | |
550 | ||
551 | module_platform_driver(xgene_ahci_driver); | |
552 | ||
553 | MODULE_DESCRIPTION("APM X-Gene AHCI SATA driver"); | |
554 | MODULE_AUTHOR("Loc Ho <lho@apm.com>"); | |
555 | MODULE_LICENSE("GPL"); | |
556 | MODULE_VERSION("0.4"); |