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9e54eae2 | 1 | /* |
8b789d89 | 2 | * copyright (c) 2013 Freescale Semiconductor, Inc. |
9e54eae2 | 3 | * Freescale IMX AHCI SATA platform driver |
9e54eae2 RZ |
4 | * |
5 | * based on the AHCI SATA platform driver by Jeff Garzik and Anton Vorontsov | |
6 | * | |
7 | * This program is free software; you can redistribute it and/or modify it | |
8 | * under the terms and conditions of the GNU General Public License, | |
9 | * version 2, as published by the Free Software Foundation. | |
10 | * | |
11 | * This program is distributed in the hope it will be useful, but WITHOUT | |
12 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
13 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for | |
14 | * more details. | |
15 | * | |
16 | * You should have received a copy of the GNU General Public License along with | |
17 | * this program. If not, see <http://www.gnu.org/licenses/>. | |
18 | */ | |
19 | ||
20 | #include <linux/kernel.h> | |
21 | #include <linux/module.h> | |
22 | #include <linux/platform_device.h> | |
23 | #include <linux/regmap.h> | |
24 | #include <linux/ahci_platform.h> | |
25 | #include <linux/of_device.h> | |
26 | #include <linux/mfd/syscon.h> | |
27 | #include <linux/mfd/syscon/imx6q-iomuxc-gpr.h> | |
8b789d89 | 28 | #include <linux/libata.h> |
9e54eae2 RZ |
29 | #include "ahci.h" |
30 | ||
31 | enum { | |
24a9ad5b SG |
32 | /* Timer 1-ms Register */ |
33 | IMX_TIMER1MS = 0x00e0, | |
34 | /* Port0 PHY Control Register */ | |
35 | IMX_P0PHYCR = 0x0178, | |
36 | IMX_P0PHYCR_TEST_PDDQ = 1 << 20, | |
e783c51c SG |
37 | IMX_P0PHYCR_CR_READ = 1 << 19, |
38 | IMX_P0PHYCR_CR_WRITE = 1 << 18, | |
39 | IMX_P0PHYCR_CR_CAP_DATA = 1 << 17, | |
40 | IMX_P0PHYCR_CR_CAP_ADDR = 1 << 16, | |
41 | /* Port0 PHY Status Register */ | |
42 | IMX_P0PHYSR = 0x017c, | |
43 | IMX_P0PHYSR_CR_ACK = 1 << 18, | |
44 | IMX_P0PHYSR_CR_DATA_OUT = 0xffff << 0, | |
45 | /* Lane0 Output Status Register */ | |
46 | IMX_LANE0_OUT_STAT = 0x2003, | |
47 | IMX_LANE0_OUT_STAT_RX_PLL_STATE = 1 << 1, | |
48 | /* Clock Reset Register */ | |
49 | IMX_CLOCK_RESET = 0x7f3f, | |
50 | IMX_CLOCK_RESET_RESET = 1 << 0, | |
9e54eae2 RZ |
51 | }; |
52 | ||
4a23d179 MV |
53 | enum ahci_imx_type { |
54 | AHCI_IMX53, | |
55 | AHCI_IMX6Q, | |
56 | }; | |
57 | ||
9e54eae2 RZ |
58 | struct imx_ahci_priv { |
59 | struct platform_device *ahci_pdev; | |
4a23d179 | 60 | enum ahci_imx_type type; |
e6dd42a9 SG |
61 | struct clk *sata_clk; |
62 | struct clk *sata_ref_clk; | |
9e54eae2 RZ |
63 | struct clk *ahb_clk; |
64 | struct regmap *gpr; | |
8b789d89 RZ |
65 | bool no_device; |
66 | bool first_time; | |
29e69413 | 67 | u32 phy_params; |
8b789d89 RZ |
68 | }; |
69 | ||
70 | static int ahci_imx_hotplug; | |
71 | module_param_named(hotplug, ahci_imx_hotplug, int, 0644); | |
72 | MODULE_PARM_DESC(hotplug, "AHCI IMX hot-plug support (0=Don't support, 1=support)"); | |
73 | ||
90870d79 HG |
74 | static void ahci_imx_host_stop(struct ata_host *host); |
75 | ||
e783c51c SG |
76 | static int imx_phy_crbit_assert(void __iomem *mmio, u32 bit, bool assert) |
77 | { | |
78 | int timeout = 10; | |
79 | u32 crval; | |
80 | u32 srval; | |
81 | ||
82 | /* Assert or deassert the bit */ | |
83 | crval = readl(mmio + IMX_P0PHYCR); | |
84 | if (assert) | |
85 | crval |= bit; | |
86 | else | |
87 | crval &= ~bit; | |
88 | writel(crval, mmio + IMX_P0PHYCR); | |
89 | ||
90 | /* Wait for the cr_ack signal */ | |
91 | do { | |
92 | srval = readl(mmio + IMX_P0PHYSR); | |
93 | if ((assert ? srval : ~srval) & IMX_P0PHYSR_CR_ACK) | |
94 | break; | |
95 | usleep_range(100, 200); | |
96 | } while (--timeout); | |
97 | ||
98 | return timeout ? 0 : -ETIMEDOUT; | |
99 | } | |
100 | ||
101 | static int imx_phy_reg_addressing(u16 addr, void __iomem *mmio) | |
102 | { | |
103 | u32 crval = addr; | |
104 | int ret; | |
105 | ||
106 | /* Supply the address on cr_data_in */ | |
107 | writel(crval, mmio + IMX_P0PHYCR); | |
108 | ||
109 | /* Assert the cr_cap_addr signal */ | |
110 | ret = imx_phy_crbit_assert(mmio, IMX_P0PHYCR_CR_CAP_ADDR, true); | |
111 | if (ret) | |
112 | return ret; | |
113 | ||
114 | /* Deassert cr_cap_addr */ | |
115 | ret = imx_phy_crbit_assert(mmio, IMX_P0PHYCR_CR_CAP_ADDR, false); | |
116 | if (ret) | |
117 | return ret; | |
118 | ||
119 | return 0; | |
120 | } | |
121 | ||
122 | static int imx_phy_reg_write(u16 val, void __iomem *mmio) | |
123 | { | |
124 | u32 crval = val; | |
125 | int ret; | |
126 | ||
127 | /* Supply the data on cr_data_in */ | |
128 | writel(crval, mmio + IMX_P0PHYCR); | |
129 | ||
130 | /* Assert the cr_cap_data signal */ | |
131 | ret = imx_phy_crbit_assert(mmio, IMX_P0PHYCR_CR_CAP_DATA, true); | |
132 | if (ret) | |
133 | return ret; | |
134 | ||
135 | /* Deassert cr_cap_data */ | |
136 | ret = imx_phy_crbit_assert(mmio, IMX_P0PHYCR_CR_CAP_DATA, false); | |
137 | if (ret) | |
138 | return ret; | |
139 | ||
140 | if (val & IMX_CLOCK_RESET_RESET) { | |
141 | /* | |
142 | * In case we're resetting the phy, it's unable to acknowledge, | |
143 | * so we return immediately here. | |
144 | */ | |
145 | crval |= IMX_P0PHYCR_CR_WRITE; | |
146 | writel(crval, mmio + IMX_P0PHYCR); | |
147 | goto out; | |
148 | } | |
149 | ||
150 | /* Assert the cr_write signal */ | |
151 | ret = imx_phy_crbit_assert(mmio, IMX_P0PHYCR_CR_WRITE, true); | |
152 | if (ret) | |
153 | return ret; | |
154 | ||
155 | /* Deassert cr_write */ | |
156 | ret = imx_phy_crbit_assert(mmio, IMX_P0PHYCR_CR_WRITE, false); | |
157 | if (ret) | |
158 | return ret; | |
159 | ||
160 | out: | |
161 | return 0; | |
162 | } | |
163 | ||
164 | static int imx_phy_reg_read(u16 *val, void __iomem *mmio) | |
165 | { | |
166 | int ret; | |
167 | ||
168 | /* Assert the cr_read signal */ | |
169 | ret = imx_phy_crbit_assert(mmio, IMX_P0PHYCR_CR_READ, true); | |
170 | if (ret) | |
171 | return ret; | |
172 | ||
173 | /* Capture the data from cr_data_out[] */ | |
174 | *val = readl(mmio + IMX_P0PHYSR) & IMX_P0PHYSR_CR_DATA_OUT; | |
175 | ||
176 | /* Deassert cr_read */ | |
177 | ret = imx_phy_crbit_assert(mmio, IMX_P0PHYCR_CR_READ, false); | |
178 | if (ret) | |
179 | return ret; | |
180 | ||
181 | return 0; | |
182 | } | |
183 | ||
184 | static int imx_sata_phy_reset(struct ahci_host_priv *hpriv) | |
185 | { | |
186 | void __iomem *mmio = hpriv->mmio; | |
187 | int timeout = 10; | |
188 | u16 val; | |
189 | int ret; | |
190 | ||
191 | /* Reset SATA PHY by setting RESET bit of PHY register CLOCK_RESET */ | |
192 | ret = imx_phy_reg_addressing(IMX_CLOCK_RESET, mmio); | |
193 | if (ret) | |
194 | return ret; | |
195 | ret = imx_phy_reg_write(IMX_CLOCK_RESET_RESET, mmio); | |
196 | if (ret) | |
197 | return ret; | |
198 | ||
199 | /* Wait for PHY RX_PLL to be stable */ | |
200 | do { | |
201 | usleep_range(100, 200); | |
202 | ret = imx_phy_reg_addressing(IMX_LANE0_OUT_STAT, mmio); | |
203 | if (ret) | |
204 | return ret; | |
205 | ret = imx_phy_reg_read(&val, mmio); | |
206 | if (ret) | |
207 | return ret; | |
208 | if (val & IMX_LANE0_OUT_STAT_RX_PLL_STATE) | |
209 | break; | |
210 | } while (--timeout); | |
211 | ||
212 | return timeout ? 0 : -ETIMEDOUT; | |
213 | } | |
214 | ||
90870d79 | 215 | static int imx_sata_enable(struct ahci_host_priv *hpriv) |
8403e2ec | 216 | { |
90870d79 | 217 | struct imx_ahci_priv *imxpriv = hpriv->plat_data; |
e783c51c | 218 | struct device *dev = &imxpriv->ahci_pdev->dev; |
8403e2ec MV |
219 | int ret; |
220 | ||
90870d79 HG |
221 | if (imxpriv->no_device) |
222 | return 0; | |
223 | ||
c7d7ddee GC |
224 | ret = ahci_platform_enable_regulators(hpriv); |
225 | if (ret) | |
226 | return ret; | |
4a23d179 | 227 | |
e6dd42a9 | 228 | ret = clk_prepare_enable(imxpriv->sata_ref_clk); |
90870d79 HG |
229 | if (ret < 0) |
230 | goto disable_regulator; | |
8403e2ec | 231 | |
4a23d179 | 232 | if (imxpriv->type == AHCI_IMX6Q) { |
90870d79 HG |
233 | /* |
234 | * set PHY Paremeters, two steps to configure the GPR13, | |
235 | * one write for rest of parameters, mask of first write | |
236 | * is 0x07ffffff, and the other one write for setting | |
237 | * the mpll_clk_en. | |
238 | */ | |
239 | regmap_update_bits(imxpriv->gpr, IOMUXC_GPR13, | |
240 | IMX6Q_GPR13_SATA_RX_EQ_VAL_MASK | | |
241 | IMX6Q_GPR13_SATA_RX_LOS_LVL_MASK | | |
242 | IMX6Q_GPR13_SATA_RX_DPLL_MODE_MASK | | |
243 | IMX6Q_GPR13_SATA_SPD_MODE_MASK | | |
244 | IMX6Q_GPR13_SATA_MPLL_SS_EN | | |
245 | IMX6Q_GPR13_SATA_TX_ATTEN_MASK | | |
246 | IMX6Q_GPR13_SATA_TX_BOOST_MASK | | |
247 | IMX6Q_GPR13_SATA_TX_LVL_MASK | | |
248 | IMX6Q_GPR13_SATA_MPLL_CLK_EN | | |
249 | IMX6Q_GPR13_SATA_TX_EDGE_RATE, | |
29e69413 | 250 | imxpriv->phy_params); |
4a23d179 MV |
251 | regmap_update_bits(imxpriv->gpr, IOMUXC_GPR13, |
252 | IMX6Q_GPR13_SATA_MPLL_CLK_EN, | |
253 | IMX6Q_GPR13_SATA_MPLL_CLK_EN); | |
e783c51c | 254 | |
3685f251 SG |
255 | usleep_range(100, 200); |
256 | ||
e783c51c SG |
257 | ret = imx_sata_phy_reset(hpriv); |
258 | if (ret) { | |
259 | dev_err(dev, "failed to reset phy: %d\n", ret); | |
19f5be0f | 260 | goto disable_clk; |
e783c51c | 261 | } |
4a23d179 | 262 | } |
8403e2ec MV |
263 | |
264 | usleep_range(1000, 2000); | |
265 | ||
266 | return 0; | |
4a23d179 | 267 | |
19f5be0f WY |
268 | disable_clk: |
269 | clk_disable_unprepare(imxpriv->sata_ref_clk); | |
90870d79 | 270 | disable_regulator: |
c7d7ddee | 271 | ahci_platform_disable_regulators(hpriv); |
90870d79 | 272 | |
4a23d179 | 273 | return ret; |
8403e2ec MV |
274 | } |
275 | ||
90870d79 | 276 | static void imx_sata_disable(struct ahci_host_priv *hpriv) |
8403e2ec | 277 | { |
90870d79 HG |
278 | struct imx_ahci_priv *imxpriv = hpriv->plat_data; |
279 | ||
280 | if (imxpriv->no_device) | |
281 | return; | |
8403e2ec | 282 | |
4a23d179 MV |
283 | if (imxpriv->type == AHCI_IMX6Q) { |
284 | regmap_update_bits(imxpriv->gpr, IOMUXC_GPR13, | |
285 | IMX6Q_GPR13_SATA_MPLL_CLK_EN, | |
286 | !IMX6Q_GPR13_SATA_MPLL_CLK_EN); | |
287 | } | |
288 | ||
e6dd42a9 | 289 | clk_disable_unprepare(imxpriv->sata_ref_clk); |
4a23d179 | 290 | |
c7d7ddee | 291 | ahci_platform_disable_regulators(hpriv); |
8403e2ec MV |
292 | } |
293 | ||
8b789d89 RZ |
294 | static void ahci_imx_error_handler(struct ata_port *ap) |
295 | { | |
296 | u32 reg_val; | |
297 | struct ata_device *dev; | |
298 | struct ata_host *host = dev_get_drvdata(ap->dev); | |
299 | struct ahci_host_priv *hpriv = host->private_data; | |
300 | void __iomem *mmio = hpriv->mmio; | |
90870d79 | 301 | struct imx_ahci_priv *imxpriv = hpriv->plat_data; |
8b789d89 RZ |
302 | |
303 | ahci_error_handler(ap); | |
304 | ||
305 | if (!(imxpriv->first_time) || ahci_imx_hotplug) | |
306 | return; | |
307 | ||
308 | imxpriv->first_time = false; | |
309 | ||
310 | ata_for_each_dev(dev, &ap->link, ENABLED) | |
311 | return; | |
312 | /* | |
313 | * Disable link to save power. An imx ahci port can't be recovered | |
314 | * without full reset once the pddq mode is enabled making it | |
315 | * impossible to use as part of libata LPM. | |
316 | */ | |
24a9ad5b SG |
317 | reg_val = readl(mmio + IMX_P0PHYCR); |
318 | writel(reg_val | IMX_P0PHYCR_TEST_PDDQ, mmio + IMX_P0PHYCR); | |
90870d79 | 319 | imx_sata_disable(hpriv); |
8b789d89 | 320 | imxpriv->no_device = true; |
f118ae59 RK |
321 | |
322 | dev_info(ap->dev, "no device found, disabling link.\n"); | |
323 | dev_info(ap->dev, "pass " MODULE_PARAM_PREFIX ".hotplug=1 to enable hotplug\n"); | |
8b789d89 RZ |
324 | } |
325 | ||
ee4e5a9a | 326 | static int ahci_imx_softreset(struct ata_link *link, unsigned int *class, |
4a23d179 MV |
327 | unsigned long deadline) |
328 | { | |
329 | struct ata_port *ap = link->ap; | |
90870d79 HG |
330 | struct ata_host *host = dev_get_drvdata(ap->dev); |
331 | struct ahci_host_priv *hpriv = host->private_data; | |
332 | struct imx_ahci_priv *imxpriv = hpriv->plat_data; | |
4a23d179 MV |
333 | int ret = -EIO; |
334 | ||
335 | if (imxpriv->type == AHCI_IMX53) | |
336 | ret = ahci_pmp_retry_srst_ops.softreset(link, class, deadline); | |
337 | else if (imxpriv->type == AHCI_IMX6Q) | |
338 | ret = ahci_ops.softreset(link, class, deadline); | |
339 | ||
340 | return ret; | |
341 | } | |
342 | ||
8b789d89 | 343 | static struct ata_port_operations ahci_imx_ops = { |
90870d79 HG |
344 | .inherits = &ahci_ops, |
345 | .host_stop = ahci_imx_host_stop, | |
8b789d89 | 346 | .error_handler = ahci_imx_error_handler, |
4a23d179 | 347 | .softreset = ahci_imx_softreset, |
8b789d89 RZ |
348 | }; |
349 | ||
350 | static const struct ata_port_info ahci_imx_port_info = { | |
351 | .flags = AHCI_FLAG_COMMON, | |
352 | .pio_mask = ATA_PIO4, | |
353 | .udma_mask = ATA_UDMA6, | |
354 | .port_ops = &ahci_imx_ops, | |
9e54eae2 RZ |
355 | }; |
356 | ||
9e54eae2 | 357 | static const struct of_device_id imx_ahci_of_match[] = { |
4a23d179 MV |
358 | { .compatible = "fsl,imx53-ahci", .data = (void *)AHCI_IMX53 }, |
359 | { .compatible = "fsl,imx6q-ahci", .data = (void *)AHCI_IMX6Q }, | |
9e54eae2 RZ |
360 | {}, |
361 | }; | |
362 | MODULE_DEVICE_TABLE(of, imx_ahci_of_match); | |
363 | ||
29e69413 RK |
364 | struct reg_value { |
365 | u32 of_value; | |
366 | u32 reg_value; | |
367 | }; | |
368 | ||
369 | struct reg_property { | |
370 | const char *name; | |
371 | const struct reg_value *values; | |
372 | size_t num_values; | |
373 | u32 def_value; | |
a6e72624 | 374 | u32 set_value; |
29e69413 RK |
375 | }; |
376 | ||
377 | static const struct reg_value gpr13_tx_level[] = { | |
378 | { 937, IMX6Q_GPR13_SATA_TX_LVL_0_937_V }, | |
379 | { 947, IMX6Q_GPR13_SATA_TX_LVL_0_947_V }, | |
380 | { 957, IMX6Q_GPR13_SATA_TX_LVL_0_957_V }, | |
381 | { 966, IMX6Q_GPR13_SATA_TX_LVL_0_966_V }, | |
382 | { 976, IMX6Q_GPR13_SATA_TX_LVL_0_976_V }, | |
383 | { 986, IMX6Q_GPR13_SATA_TX_LVL_0_986_V }, | |
384 | { 996, IMX6Q_GPR13_SATA_TX_LVL_0_996_V }, | |
385 | { 1005, IMX6Q_GPR13_SATA_TX_LVL_1_005_V }, | |
386 | { 1015, IMX6Q_GPR13_SATA_TX_LVL_1_015_V }, | |
387 | { 1025, IMX6Q_GPR13_SATA_TX_LVL_1_025_V }, | |
388 | { 1035, IMX6Q_GPR13_SATA_TX_LVL_1_035_V }, | |
389 | { 1045, IMX6Q_GPR13_SATA_TX_LVL_1_045_V }, | |
390 | { 1054, IMX6Q_GPR13_SATA_TX_LVL_1_054_V }, | |
391 | { 1064, IMX6Q_GPR13_SATA_TX_LVL_1_064_V }, | |
392 | { 1074, IMX6Q_GPR13_SATA_TX_LVL_1_074_V }, | |
393 | { 1084, IMX6Q_GPR13_SATA_TX_LVL_1_084_V }, | |
394 | { 1094, IMX6Q_GPR13_SATA_TX_LVL_1_094_V }, | |
395 | { 1104, IMX6Q_GPR13_SATA_TX_LVL_1_104_V }, | |
396 | { 1113, IMX6Q_GPR13_SATA_TX_LVL_1_113_V }, | |
397 | { 1123, IMX6Q_GPR13_SATA_TX_LVL_1_123_V }, | |
398 | { 1133, IMX6Q_GPR13_SATA_TX_LVL_1_133_V }, | |
399 | { 1143, IMX6Q_GPR13_SATA_TX_LVL_1_143_V }, | |
400 | { 1152, IMX6Q_GPR13_SATA_TX_LVL_1_152_V }, | |
401 | { 1162, IMX6Q_GPR13_SATA_TX_LVL_1_162_V }, | |
402 | { 1172, IMX6Q_GPR13_SATA_TX_LVL_1_172_V }, | |
403 | { 1182, IMX6Q_GPR13_SATA_TX_LVL_1_182_V }, | |
404 | { 1191, IMX6Q_GPR13_SATA_TX_LVL_1_191_V }, | |
405 | { 1201, IMX6Q_GPR13_SATA_TX_LVL_1_201_V }, | |
406 | { 1211, IMX6Q_GPR13_SATA_TX_LVL_1_211_V }, | |
407 | { 1221, IMX6Q_GPR13_SATA_TX_LVL_1_221_V }, | |
408 | { 1230, IMX6Q_GPR13_SATA_TX_LVL_1_230_V }, | |
409 | { 1240, IMX6Q_GPR13_SATA_TX_LVL_1_240_V } | |
410 | }; | |
411 | ||
412 | static const struct reg_value gpr13_tx_boost[] = { | |
413 | { 0, IMX6Q_GPR13_SATA_TX_BOOST_0_00_DB }, | |
414 | { 370, IMX6Q_GPR13_SATA_TX_BOOST_0_37_DB }, | |
415 | { 740, IMX6Q_GPR13_SATA_TX_BOOST_0_74_DB }, | |
416 | { 1110, IMX6Q_GPR13_SATA_TX_BOOST_1_11_DB }, | |
417 | { 1480, IMX6Q_GPR13_SATA_TX_BOOST_1_48_DB }, | |
418 | { 1850, IMX6Q_GPR13_SATA_TX_BOOST_1_85_DB }, | |
419 | { 2220, IMX6Q_GPR13_SATA_TX_BOOST_2_22_DB }, | |
420 | { 2590, IMX6Q_GPR13_SATA_TX_BOOST_2_59_DB }, | |
421 | { 2960, IMX6Q_GPR13_SATA_TX_BOOST_2_96_DB }, | |
422 | { 3330, IMX6Q_GPR13_SATA_TX_BOOST_3_33_DB }, | |
423 | { 3700, IMX6Q_GPR13_SATA_TX_BOOST_3_70_DB }, | |
424 | { 4070, IMX6Q_GPR13_SATA_TX_BOOST_4_07_DB }, | |
425 | { 4440, IMX6Q_GPR13_SATA_TX_BOOST_4_44_DB }, | |
426 | { 4810, IMX6Q_GPR13_SATA_TX_BOOST_4_81_DB }, | |
427 | { 5280, IMX6Q_GPR13_SATA_TX_BOOST_5_28_DB }, | |
428 | { 5750, IMX6Q_GPR13_SATA_TX_BOOST_5_75_DB } | |
429 | }; | |
430 | ||
431 | static const struct reg_value gpr13_tx_atten[] = { | |
432 | { 8, IMX6Q_GPR13_SATA_TX_ATTEN_8_16 }, | |
433 | { 9, IMX6Q_GPR13_SATA_TX_ATTEN_9_16 }, | |
434 | { 10, IMX6Q_GPR13_SATA_TX_ATTEN_10_16 }, | |
435 | { 12, IMX6Q_GPR13_SATA_TX_ATTEN_12_16 }, | |
436 | { 14, IMX6Q_GPR13_SATA_TX_ATTEN_14_16 }, | |
437 | { 16, IMX6Q_GPR13_SATA_TX_ATTEN_16_16 }, | |
438 | }; | |
439 | ||
440 | static const struct reg_value gpr13_rx_eq[] = { | |
441 | { 500, IMX6Q_GPR13_SATA_RX_EQ_VAL_0_5_DB }, | |
442 | { 1000, IMX6Q_GPR13_SATA_RX_EQ_VAL_1_0_DB }, | |
443 | { 1500, IMX6Q_GPR13_SATA_RX_EQ_VAL_1_5_DB }, | |
444 | { 2000, IMX6Q_GPR13_SATA_RX_EQ_VAL_2_0_DB }, | |
445 | { 2500, IMX6Q_GPR13_SATA_RX_EQ_VAL_2_5_DB }, | |
446 | { 3000, IMX6Q_GPR13_SATA_RX_EQ_VAL_3_0_DB }, | |
447 | { 3500, IMX6Q_GPR13_SATA_RX_EQ_VAL_3_5_DB }, | |
448 | { 4000, IMX6Q_GPR13_SATA_RX_EQ_VAL_4_0_DB }, | |
449 | }; | |
450 | ||
451 | static const struct reg_property gpr13_props[] = { | |
452 | { | |
453 | .name = "fsl,transmit-level-mV", | |
454 | .values = gpr13_tx_level, | |
455 | .num_values = ARRAY_SIZE(gpr13_tx_level), | |
456 | .def_value = IMX6Q_GPR13_SATA_TX_LVL_1_025_V, | |
457 | }, { | |
458 | .name = "fsl,transmit-boost-mdB", | |
459 | .values = gpr13_tx_boost, | |
460 | .num_values = ARRAY_SIZE(gpr13_tx_boost), | |
461 | .def_value = IMX6Q_GPR13_SATA_TX_BOOST_3_33_DB, | |
462 | }, { | |
463 | .name = "fsl,transmit-atten-16ths", | |
464 | .values = gpr13_tx_atten, | |
465 | .num_values = ARRAY_SIZE(gpr13_tx_atten), | |
466 | .def_value = IMX6Q_GPR13_SATA_TX_ATTEN_9_16, | |
467 | }, { | |
468 | .name = "fsl,receive-eq-mdB", | |
469 | .values = gpr13_rx_eq, | |
470 | .num_values = ARRAY_SIZE(gpr13_rx_eq), | |
471 | .def_value = IMX6Q_GPR13_SATA_RX_EQ_VAL_3_0_DB, | |
a6e72624 RK |
472 | }, { |
473 | .name = "fsl,no-spread-spectrum", | |
474 | .def_value = IMX6Q_GPR13_SATA_MPLL_SS_EN, | |
475 | .set_value = 0, | |
29e69413 RK |
476 | }, |
477 | }; | |
478 | ||
479 | static u32 imx_ahci_parse_props(struct device *dev, | |
480 | const struct reg_property *prop, size_t num) | |
481 | { | |
482 | struct device_node *np = dev->of_node; | |
483 | u32 reg_value = 0; | |
484 | int i, j; | |
485 | ||
486 | for (i = 0; i < num; i++, prop++) { | |
487 | u32 of_val; | |
488 | ||
a6e72624 RK |
489 | if (prop->num_values == 0) { |
490 | if (of_property_read_bool(np, prop->name)) | |
491 | reg_value |= prop->set_value; | |
492 | else | |
493 | reg_value |= prop->def_value; | |
494 | continue; | |
495 | } | |
496 | ||
29e69413 RK |
497 | if (of_property_read_u32(np, prop->name, &of_val)) { |
498 | dev_info(dev, "%s not specified, using %08x\n", | |
499 | prop->name, prop->def_value); | |
500 | reg_value |= prop->def_value; | |
501 | continue; | |
502 | } | |
503 | ||
504 | for (j = 0; j < prop->num_values; j++) { | |
505 | if (prop->values[j].of_value == of_val) { | |
506 | dev_info(dev, "%s value %u, using %08x\n", | |
507 | prop->name, of_val, prop->values[j].reg_value); | |
508 | reg_value |= prop->values[j].reg_value; | |
509 | break; | |
510 | } | |
511 | } | |
512 | ||
513 | if (j == prop->num_values) { | |
514 | dev_err(dev, "DT property %s is not a valid value\n", | |
515 | prop->name); | |
516 | reg_value |= prop->def_value; | |
517 | } | |
518 | } | |
519 | ||
520 | return reg_value; | |
521 | } | |
522 | ||
9e54eae2 RZ |
523 | static int imx_ahci_probe(struct platform_device *pdev) |
524 | { | |
525 | struct device *dev = &pdev->dev; | |
9e54eae2 | 526 | const struct of_device_id *of_id; |
90870d79 | 527 | struct ahci_host_priv *hpriv; |
9e54eae2 | 528 | struct imx_ahci_priv *imxpriv; |
90870d79 | 529 | unsigned int reg_val; |
9e54eae2 RZ |
530 | int ret; |
531 | ||
4a23d179 MV |
532 | of_id = of_match_device(imx_ahci_of_match, dev); |
533 | if (!of_id) | |
534 | return -EINVAL; | |
535 | ||
9e54eae2 | 536 | imxpriv = devm_kzalloc(dev, sizeof(*imxpriv), GFP_KERNEL); |
90870d79 | 537 | if (!imxpriv) |
9e54eae2 | 538 | return -ENOMEM; |
9e54eae2 | 539 | |
e783c51c | 540 | imxpriv->ahci_pdev = pdev; |
8b789d89 RZ |
541 | imxpriv->no_device = false; |
542 | imxpriv->first_time = true; | |
90870d79 | 543 | imxpriv->type = (enum ahci_imx_type)of_id->data; |
e6dd42a9 SG |
544 | |
545 | imxpriv->sata_clk = devm_clk_get(dev, "sata"); | |
546 | if (IS_ERR(imxpriv->sata_clk)) { | |
547 | dev_err(dev, "can't get sata clock.\n"); | |
548 | return PTR_ERR(imxpriv->sata_clk); | |
549 | } | |
550 | ||
551 | imxpriv->sata_ref_clk = devm_clk_get(dev, "sata_ref"); | |
552 | if (IS_ERR(imxpriv->sata_ref_clk)) { | |
553 | dev_err(dev, "can't get sata_ref clock.\n"); | |
554 | return PTR_ERR(imxpriv->sata_ref_clk); | |
555 | } | |
556 | ||
9e54eae2 RZ |
557 | imxpriv->ahb_clk = devm_clk_get(dev, "ahb"); |
558 | if (IS_ERR(imxpriv->ahb_clk)) { | |
559 | dev_err(dev, "can't get ahb clock.\n"); | |
90870d79 | 560 | return PTR_ERR(imxpriv->ahb_clk); |
9e54eae2 RZ |
561 | } |
562 | ||
90870d79 | 563 | if (imxpriv->type == AHCI_IMX6Q) { |
29e69413 RK |
564 | u32 reg_value; |
565 | ||
90870d79 HG |
566 | imxpriv->gpr = syscon_regmap_lookup_by_compatible( |
567 | "fsl,imx6q-iomuxc-gpr"); | |
568 | if (IS_ERR(imxpriv->gpr)) { | |
569 | dev_err(dev, | |
570 | "failed to find fsl,imx6q-iomux-gpr regmap\n"); | |
571 | return PTR_ERR(imxpriv->gpr); | |
4a23d179 | 572 | } |
29e69413 RK |
573 | |
574 | reg_value = imx_ahci_parse_props(dev, gpr13_props, | |
575 | ARRAY_SIZE(gpr13_props)); | |
576 | ||
577 | imxpriv->phy_params = | |
578 | IMX6Q_GPR13_SATA_RX_LOS_LVL_SATA2M | | |
579 | IMX6Q_GPR13_SATA_RX_DPLL_MODE_2P_4F | | |
580 | IMX6Q_GPR13_SATA_SPD_MODE_3P0G | | |
29e69413 | 581 | reg_value; |
4a23d179 MV |
582 | } |
583 | ||
90870d79 HG |
584 | hpriv = ahci_platform_get_resources(pdev); |
585 | if (IS_ERR(hpriv)) | |
586 | return PTR_ERR(hpriv); | |
587 | ||
588 | hpriv->plat_data = imxpriv; | |
9e54eae2 | 589 | |
e6dd42a9 | 590 | ret = clk_prepare_enable(imxpriv->sata_clk); |
90870d79 HG |
591 | if (ret) |
592 | return ret; | |
9e54eae2 | 593 | |
e6dd42a9 SG |
594 | ret = imx_sata_enable(hpriv); |
595 | if (ret) | |
596 | goto disable_clk; | |
597 | ||
90870d79 HG |
598 | /* |
599 | * Configure the HWINIT bits of the HOST_CAP and HOST_PORTS_IMPL, | |
24a9ad5b | 600 | * and IP vendor specific register IMX_TIMER1MS. |
90870d79 HG |
601 | * Configure CAP_SSS (support stagered spin up). |
602 | * Implement the port0. | |
603 | * Get the ahb clock rate, and configure the TIMER1MS register. | |
604 | */ | |
605 | reg_val = readl(hpriv->mmio + HOST_CAP); | |
606 | if (!(reg_val & HOST_CAP_SSS)) { | |
607 | reg_val |= HOST_CAP_SSS; | |
608 | writel(reg_val, hpriv->mmio + HOST_CAP); | |
609 | } | |
610 | reg_val = readl(hpriv->mmio + HOST_PORTS_IMPL); | |
611 | if (!(reg_val & 0x1)) { | |
612 | reg_val |= 0x1; | |
613 | writel(reg_val, hpriv->mmio + HOST_PORTS_IMPL); | |
9e54eae2 RZ |
614 | } |
615 | ||
90870d79 | 616 | reg_val = clk_get_rate(imxpriv->ahb_clk) / 1000; |
24a9ad5b | 617 | writel(reg_val, hpriv->mmio + IMX_TIMER1MS); |
9e54eae2 | 618 | |
725c7b57 | 619 | ret = ahci_platform_init_host(pdev, hpriv, &ahci_imx_port_info); |
90870d79 | 620 | if (ret) |
e6dd42a9 SG |
621 | goto disable_sata; |
622 | ||
623 | return 0; | |
9e54eae2 | 624 | |
e6dd42a9 SG |
625 | disable_sata: |
626 | imx_sata_disable(hpriv); | |
627 | disable_clk: | |
628 | clk_disable_unprepare(imxpriv->sata_clk); | |
90870d79 HG |
629 | return ret; |
630 | } | |
4a23d179 | 631 | |
90870d79 HG |
632 | static void ahci_imx_host_stop(struct ata_host *host) |
633 | { | |
634 | struct ahci_host_priv *hpriv = host->private_data; | |
e6dd42a9 | 635 | struct imx_ahci_priv *imxpriv = hpriv->plat_data; |
8403e2ec | 636 | |
90870d79 | 637 | imx_sata_disable(hpriv); |
e6dd42a9 | 638 | clk_disable_unprepare(imxpriv->sata_clk); |
90870d79 | 639 | } |
9e54eae2 | 640 | |
46ce6b74 | 641 | #ifdef CONFIG_PM_SLEEP |
90870d79 HG |
642 | static int imx_ahci_suspend(struct device *dev) |
643 | { | |
644 | struct ata_host *host = dev_get_drvdata(dev); | |
645 | struct ahci_host_priv *hpriv = host->private_data; | |
646 | int ret; | |
9e54eae2 | 647 | |
90870d79 HG |
648 | ret = ahci_platform_suspend_host(dev); |
649 | if (ret) | |
9e54eae2 | 650 | return ret; |
90870d79 HG |
651 | |
652 | imx_sata_disable(hpriv); | |
9e54eae2 RZ |
653 | |
654 | return 0; | |
655 | } | |
656 | ||
90870d79 | 657 | static int imx_ahci_resume(struct device *dev) |
9e54eae2 | 658 | { |
90870d79 HG |
659 | struct ata_host *host = dev_get_drvdata(dev); |
660 | struct ahci_host_priv *hpriv = host->private_data; | |
661 | int ret; | |
9e54eae2 | 662 | |
90870d79 HG |
663 | ret = imx_sata_enable(hpriv); |
664 | if (ret) | |
665 | return ret; | |
666 | ||
667 | return ahci_platform_resume_host(dev); | |
9e54eae2 | 668 | } |
46ce6b74 | 669 | #endif |
9e54eae2 | 670 | |
90870d79 HG |
671 | static SIMPLE_DEV_PM_OPS(ahci_imx_pm_ops, imx_ahci_suspend, imx_ahci_resume); |
672 | ||
9e54eae2 RZ |
673 | static struct platform_driver imx_ahci_driver = { |
674 | .probe = imx_ahci_probe, | |
90870d79 | 675 | .remove = ata_platform_remove_one, |
9e54eae2 RZ |
676 | .driver = { |
677 | .name = "ahci-imx", | |
9e54eae2 | 678 | .of_match_table = imx_ahci_of_match, |
90870d79 | 679 | .pm = &ahci_imx_pm_ops, |
9e54eae2 RZ |
680 | }, |
681 | }; | |
682 | module_platform_driver(imx_ahci_driver); | |
683 | ||
684 | MODULE_DESCRIPTION("Freescale i.MX AHCI SATA platform driver"); | |
685 | MODULE_AUTHOR("Richard Zhu <Hong-Xing.Zhu@freescale.com>"); | |
686 | MODULE_LICENSE("GPL"); | |
687 | MODULE_ALIAS("ahci:imx"); |