1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 * Copyright 2011-2014 Freescale Semiconductor, Inc.
4 * Copyright 2011 Linaro Ltd.
5 */
6
7 #include <linux/delay.h>
8 #include <linux/init.h>
9 #include <linux/io.h>
10 #include <linux/irq.h>
11 #include <linux/genalloc.h>
12 #include <linux/irqchip/arm-gic.h>
13 #include <linux/mfd/syscon.h>
14 #include <linux/mfd/syscon/imx6q-iomuxc-gpr.h>
15 #include <linux/of.h>
16 #include <linux/of_address.h>
17 #include <linux/of_platform.h>
18 #include <linux/regmap.h>
19 #include <linux/suspend.h>
20 #include <asm/cacheflush.h>
21 #include <asm/fncpy.h>
22 #include <asm/proc-fns.h>
23 #include <asm/suspend.h>
24 #include <asm/tlb.h>
25
26 #include "common.h"
27 #include "hardware.h"
28
29 #define CCR 0x0
30 #define BM_CCR_WB_COUNT (0x7 << 16)
31 #define BM_CCR_RBC_BYPASS_COUNT (0x3f << 21)
32 #define BM_CCR_RBC_EN (0x1 << 27)
33
34 #define CLPCR 0x54
35 #define BP_CLPCR_LPM 0
36 #define BM_CLPCR_LPM (0x3 << 0)
37 #define BM_CLPCR_BYPASS_PMIC_READY (0x1 << 2)
38 #define BM_CLPCR_ARM_CLK_DIS_ON_LPM (0x1 << 5)
39 #define BM_CLPCR_SBYOS (0x1 << 6)
40 #define BM_CLPCR_DIS_REF_OSC (0x1 << 7)
41 #define BM_CLPCR_VSTBY (0x1 << 8)
42 #define BP_CLPCR_STBY_COUNT 9
43 #define BM_CLPCR_STBY_COUNT (0x3 << 9)
44 #define BM_CLPCR_COSC_PWRDOWN (0x1 << 11)
45 #define BM_CLPCR_WB_PER_AT_LPM (0x1 << 16)
46 #define BM_CLPCR_WB_CORE_AT_LPM (0x1 << 17)
47 #define BM_CLPCR_BYP_MMDC_CH0_LPM_HS (0x1 << 19)
48 #define BM_CLPCR_BYP_MMDC_CH1_LPM_HS (0x1 << 21)
49 #define BM_CLPCR_MASK_CORE0_WFI (0x1 << 22)
50 #define BM_CLPCR_MASK_CORE1_WFI (0x1 << 23)
51 #define BM_CLPCR_MASK_CORE2_WFI (0x1 << 24)
52 #define BM_CLPCR_MASK_CORE3_WFI (0x1 << 25)
53 #define BM_CLPCR_MASK_SCU_IDLE (0x1 << 26)
54 #define BM_CLPCR_MASK_L2CC_IDLE (0x1 << 27)
55
56 #define CGPR 0x64
57 #define BM_CGPR_INT_MEM_CLK_LPM (0x1 << 17)
58
59 #define MX6Q_SUSPEND_OCRAM_SIZE 0x1000
60 #define MX6_MAX_MMDC_IO_NUM 33
61
62 static void __iomem *ccm_base;
63 static void __iomem *suspend_ocram_base;
64 static void (*imx6_suspend_in_ocram_fn)(void __iomem *ocram_vbase);
65
66 /*
67 * suspend ocram space layout:
68 * ======================== high address ======================
69 * .
70 * .
71 * .
72 * ^
73 * ^
74 * ^
75 * imx6_suspend code
76 * PM_INFO structure(imx6_cpu_pm_info)
77 * ======================== low address =======================
78 */
79
80 struct imx6_pm_base {
81 phys_addr_t pbase;
82 void __iomem *vbase;
83 };
84
85 struct imx6_pm_socdata {
86 u32 ddr_type;
87 const char *mmdc_compat;
88 const char *src_compat;
89 const char *iomuxc_compat;
90 const char *gpc_compat;
91 const char *pl310_compat;
92 const u32 mmdc_io_num;
93 const u32 *mmdc_io_offset;
94 };
95
96 static const u32 imx6q_mmdc_io_offset[] __initconst = {
97 0x5ac, 0x5b4, 0x528, 0x520, /* DQM0 ~ DQM3 */
98 0x514, 0x510, 0x5bc, 0x5c4, /* DQM4 ~ DQM7 */
99 0x56c, 0x578, 0x588, 0x594, /* CAS, RAS, SDCLK_0, SDCLK_1 */
100 0x5a8, 0x5b0, 0x524, 0x51c, /* SDQS0 ~ SDQS3 */
101 0x518, 0x50c, 0x5b8, 0x5c0, /* SDQS4 ~ SDQS7 */
102 0x784, 0x788, 0x794, 0x79c, /* GPR_B0DS ~ GPR_B3DS */
103 0x7a0, 0x7a4, 0x7a8, 0x748, /* GPR_B4DS ~ GPR_B7DS */
104 0x59c, 0x5a0, 0x750, 0x774, /* SODT0, SODT1, MODE_CTL, MODE */
105 0x74c, /* GPR_ADDS */
106 };
107
108 static const u32 imx6dl_mmdc_io_offset[] __initconst = {
109 0x470, 0x474, 0x478, 0x47c, /* DQM0 ~ DQM3 */
110 0x480, 0x484, 0x488, 0x48c, /* DQM4 ~ DQM7 */
111 0x464, 0x490, 0x4ac, 0x4b0, /* CAS, RAS, SDCLK_0, SDCLK_1 */
112 0x4bc, 0x4c0, 0x4c4, 0x4c8, /* DRAM_SDQS0 ~ DRAM_SDQS3 */
113 0x4cc, 0x4d0, 0x4d4, 0x4d8, /* DRAM_SDQS4 ~ DRAM_SDQS7 */
114 0x764, 0x770, 0x778, 0x77c, /* GPR_B0DS ~ GPR_B3DS */
115 0x780, 0x784, 0x78c, 0x748, /* GPR_B4DS ~ GPR_B7DS */
116 0x4b4, 0x4b8, 0x750, 0x760, /* SODT0, SODT1, MODE_CTL, MODE */
117 0x74c, /* GPR_ADDS */
118 };
119
120 static const u32 imx6sl_mmdc_io_offset[] __initconst = {
121 0x30c, 0x310, 0x314, 0x318, /* DQM0 ~ DQM3 */
122 0x5c4, 0x5cc, 0x5d4, 0x5d8, /* GPR_B0DS ~ GPR_B3DS */
123 0x300, 0x31c, 0x338, 0x5ac, /* CAS, RAS, SDCLK_0, GPR_ADDS */
124 0x33c, 0x340, 0x5b0, 0x5c0, /* SODT0, SODT1, MODE_CTL, MODE */
125 0x330, 0x334, 0x320, /* SDCKE0, SDCKE1, RESET */
126 };
127
128 static const u32 imx6sll_mmdc_io_offset[] __initconst = {
129 0x294, 0x298, 0x29c, 0x2a0, /* DQM0 ~ DQM3 */
130 0x544, 0x54c, 0x554, 0x558, /* GPR_B0DS ~ GPR_B3DS */
131 0x530, 0x540, 0x2ac, 0x52c, /* MODE_CTL, MODE, SDCLK_0, GPR_ADDDS */
132 0x2a4, 0x2a8, /* SDCKE0, SDCKE1*/
133 };
134
135 static const u32 imx6sx_mmdc_io_offset[] __initconst = {
136 0x2ec, 0x2f0, 0x2f4, 0x2f8, /* DQM0 ~ DQM3 */
137 0x60c, 0x610, 0x61c, 0x620, /* GPR_B0DS ~ GPR_B3DS */
138 0x300, 0x2fc, 0x32c, 0x5f4, /* CAS, RAS, SDCLK_0, GPR_ADDS */
139 0x310, 0x314, 0x5f8, 0x608, /* SODT0, SODT1, MODE_CTL, MODE */
140 0x330, 0x334, 0x338, 0x33c, /* SDQS0 ~ SDQS3 */
141 };
142
143 static const u32 imx6ul_mmdc_io_offset[] __initconst = {
144 0x244, 0x248, 0x24c, 0x250, /* DQM0, DQM1, RAS, CAS */
145 0x27c, 0x498, 0x4a4, 0x490, /* SDCLK0, GPR_B0DS-B1DS, GPR_ADDS */
146 0x280, 0x284, 0x260, 0x264, /* SDQS0~1, SODT0, SODT1 */
147 0x494, 0x4b0, /* MODE_CTL, MODE, */
148 };
149
150 static const struct imx6_pm_socdata imx6q_pm_data __initconst = {
151 .mmdc_compat = "fsl,imx6q-mmdc",
152 .src_compat = "fsl,imx6q-src",
153 .iomuxc_compat = "fsl,imx6q-iomuxc",
154 .gpc_compat = "fsl,imx6q-gpc",
155 .pl310_compat = "arm,pl310-cache",
156 .mmdc_io_num = ARRAY_SIZE(imx6q_mmdc_io_offset),
157 .mmdc_io_offset = imx6q_mmdc_io_offset,
158 };
159
160 static const struct imx6_pm_socdata imx6dl_pm_data __initconst = {
161 .mmdc_compat = "fsl,imx6q-mmdc",
162 .src_compat = "fsl,imx6q-src",
163 .iomuxc_compat = "fsl,imx6dl-iomuxc",
164 .gpc_compat = "fsl,imx6q-gpc",
165 .pl310_compat = "arm,pl310-cache",
166 .mmdc_io_num = ARRAY_SIZE(imx6dl_mmdc_io_offset),
167 .mmdc_io_offset = imx6dl_mmdc_io_offset,
168 };
169
170 static const struct imx6_pm_socdata imx6sl_pm_data __initconst = {
171 .mmdc_compat = "fsl,imx6sl-mmdc",
172 .src_compat = "fsl,imx6sl-src",
173 .iomuxc_compat = "fsl,imx6sl-iomuxc",
174 .gpc_compat = "fsl,imx6sl-gpc",
175 .pl310_compat = "arm,pl310-cache",
176 .mmdc_io_num = ARRAY_SIZE(imx6sl_mmdc_io_offset),
177 .mmdc_io_offset = imx6sl_mmdc_io_offset,
178 };
179
180 static const struct imx6_pm_socdata imx6sll_pm_data __initconst = {
181 .mmdc_compat = "fsl,imx6sll-mmdc",
182 .src_compat = "fsl,imx6sll-src",
183 .iomuxc_compat = "fsl,imx6sll-iomuxc",
184 .gpc_compat = "fsl,imx6sll-gpc",
185 .pl310_compat = "arm,pl310-cache",
186 .mmdc_io_num = ARRAY_SIZE(imx6sll_mmdc_io_offset),
187 .mmdc_io_offset = imx6sll_mmdc_io_offset,
188 };
189
190 static const struct imx6_pm_socdata imx6sx_pm_data __initconst = {
191 .mmdc_compat = "fsl,imx6sx-mmdc",
192 .src_compat = "fsl,imx6sx-src",
193 .iomuxc_compat = "fsl,imx6sx-iomuxc",
194 .gpc_compat = "fsl,imx6sx-gpc",
195 .pl310_compat = "arm,pl310-cache",
196 .mmdc_io_num = ARRAY_SIZE(imx6sx_mmdc_io_offset),
197 .mmdc_io_offset = imx6sx_mmdc_io_offset,
198 };
199
200 static const struct imx6_pm_socdata imx6ul_pm_data __initconst = {
201 .mmdc_compat = "fsl,imx6ul-mmdc",
202 .src_compat = "fsl,imx6ul-src",
203 .iomuxc_compat = "fsl,imx6ul-iomuxc",
204 .gpc_compat = "fsl,imx6ul-gpc",
205 .pl310_compat = NULL,
206 .mmdc_io_num = ARRAY_SIZE(imx6ul_mmdc_io_offset),
207 .mmdc_io_offset = imx6ul_mmdc_io_offset,
208 };
209
210 /*
211 * This structure is for passing necessary data for low level ocram
212 * suspend code(arch/arm/mach-imx/suspend-imx6.S), if this struct
213 * definition is changed, the offset definition in
214 * arch/arm/mach-imx/suspend-imx6.S must be also changed accordingly,
215 * otherwise, the suspend to ocram function will be broken!
216 */
217 struct imx6_cpu_pm_info {
218 phys_addr_t pbase; /* The physical address of pm_info. */
219 phys_addr_t resume_addr; /* The physical resume address for asm code */
220 u32 ddr_type;
221 u32 pm_info_size; /* Size of pm_info. */
222 struct imx6_pm_base mmdc_base;
223 struct imx6_pm_base src_base;
224 struct imx6_pm_base iomuxc_base;
225 struct imx6_pm_base ccm_base;
226 struct imx6_pm_base gpc_base;
227 struct imx6_pm_base l2_base;
228 u32 mmdc_io_num; /* Number of MMDC IOs which need saved/restored. */
229 u32 mmdc_io_val[MX6_MAX_MMDC_IO_NUM][2]; /* To save offset and value */
230 } __aligned(8);
231
imx6_set_int_mem_clk_lpm(bool enable)232 void imx6_set_int_mem_clk_lpm(bool enable)
233 {
234 u32 val = readl_relaxed(ccm_base + CGPR);
235
236 val &= ~BM_CGPR_INT_MEM_CLK_LPM;
237 if (enable)
238 val |= BM_CGPR_INT_MEM_CLK_LPM;
239 writel_relaxed(val, ccm_base + CGPR);
240 }
241
imx6_enable_rbc(bool enable)242 void imx6_enable_rbc(bool enable)
243 {
244 u32 val;
245
246 /*
247 * need to mask all interrupts in GPC before
248 * operating RBC configurations
249 */
250 imx_gpc_mask_all();
251
252 /* configure RBC enable bit */
253 val = readl_relaxed(ccm_base + CCR);
254 val &= ~BM_CCR_RBC_EN;
255 val |= enable ? BM_CCR_RBC_EN : 0;
256 writel_relaxed(val, ccm_base + CCR);
257
258 /* configure RBC count */
259 val = readl_relaxed(ccm_base + CCR);
260 val &= ~BM_CCR_RBC_BYPASS_COUNT;
261 val |= enable ? BM_CCR_RBC_BYPASS_COUNT : 0;
262 writel(val, ccm_base + CCR);
263
264 /*
265 * need to delay at least 2 cycles of CKIL(32K)
266 * due to hardware design requirement, which is
267 * ~61us, here we use 65us for safe
268 */
269 udelay(65);
270
271 /* restore GPC interrupt mask settings */
272 imx_gpc_restore_all();
273 }
274
imx6q_enable_wb(bool enable)275 static void imx6q_enable_wb(bool enable)
276 {
277 u32 val;
278
279 /* configure well bias enable bit */
280 val = readl_relaxed(ccm_base + CLPCR);
281 val &= ~BM_CLPCR_WB_PER_AT_LPM;
282 val |= enable ? BM_CLPCR_WB_PER_AT_LPM : 0;
283 writel_relaxed(val, ccm_base + CLPCR);
284
285 /* configure well bias count */
286 val = readl_relaxed(ccm_base + CCR);
287 val &= ~BM_CCR_WB_COUNT;
288 val |= enable ? BM_CCR_WB_COUNT : 0;
289 writel_relaxed(val, ccm_base + CCR);
290 }
291
imx6_set_lpm(enum mxc_cpu_pwr_mode mode)292 int imx6_set_lpm(enum mxc_cpu_pwr_mode mode)
293 {
294 u32 val = readl_relaxed(ccm_base + CLPCR);
295
296 val &= ~BM_CLPCR_LPM;
297 switch (mode) {
298 case WAIT_CLOCKED:
299 break;
300 case WAIT_UNCLOCKED:
301 val |= 0x1 << BP_CLPCR_LPM;
302 val |= BM_CLPCR_ARM_CLK_DIS_ON_LPM;
303 break;
304 case STOP_POWER_ON:
305 val |= 0x2 << BP_CLPCR_LPM;
306 val &= ~BM_CLPCR_VSTBY;
307 val &= ~BM_CLPCR_SBYOS;
308 if (cpu_is_imx6sl())
309 val |= BM_CLPCR_BYPASS_PMIC_READY;
310 if (cpu_is_imx6sl() || cpu_is_imx6sx() || cpu_is_imx6ul() ||
311 cpu_is_imx6ull() || cpu_is_imx6sll() || cpu_is_imx6ulz())
312 val |= BM_CLPCR_BYP_MMDC_CH0_LPM_HS;
313 else
314 val |= BM_CLPCR_BYP_MMDC_CH1_LPM_HS;
315 break;
316 case WAIT_UNCLOCKED_POWER_OFF:
317 val |= 0x1 << BP_CLPCR_LPM;
318 val &= ~BM_CLPCR_VSTBY;
319 val &= ~BM_CLPCR_SBYOS;
320 break;
321 case STOP_POWER_OFF:
322 val |= 0x2 << BP_CLPCR_LPM;
323 val |= 0x3 << BP_CLPCR_STBY_COUNT;
324 val |= BM_CLPCR_VSTBY;
325 val |= BM_CLPCR_SBYOS;
326 if (cpu_is_imx6sl() || cpu_is_imx6sx())
327 val |= BM_CLPCR_BYPASS_PMIC_READY;
328 if (cpu_is_imx6sl() || cpu_is_imx6sx() || cpu_is_imx6ul() ||
329 cpu_is_imx6ull() || cpu_is_imx6sll() || cpu_is_imx6ulz())
330 val |= BM_CLPCR_BYP_MMDC_CH0_LPM_HS;
331 else
332 val |= BM_CLPCR_BYP_MMDC_CH1_LPM_HS;
333 break;
334 default:
335 return -EINVAL;
336 }
337
338 /*
339 * ERR007265: CCM: When improper low-power sequence is used,
340 * the SoC enters low power mode before the ARM core executes WFI.
341 *
342 * Software workaround:
343 * 1) Software should trigger IRQ #32 (IOMUX) to be always pending
344 * by setting IOMUX_GPR1_GINT.
345 * 2) Software should then unmask IRQ #32 in GPC before setting CCM
346 * Low-Power mode.
347 * 3) Software should mask IRQ #32 right after CCM Low-Power mode
348 * is set (set bits 0-1 of CCM_CLPCR).
349 *
350 * Note that IRQ #32 is GIC SPI #0.
351 */
352 if (mode != WAIT_CLOCKED)
353 imx_gpc_hwirq_unmask(0);
354 writel_relaxed(val, ccm_base + CLPCR);
355 if (mode != WAIT_CLOCKED)
356 imx_gpc_hwirq_mask(0);
357
358 return 0;
359 }
360
imx6q_suspend_finish(unsigned long val)361 static int imx6q_suspend_finish(unsigned long val)
362 {
363 if (!imx6_suspend_in_ocram_fn) {
364 cpu_do_idle();
365 } else {
366 /*
367 * call low level suspend function in ocram,
368 * as we need to float DDR IO.
369 */
370 local_flush_tlb_all();
371 /* check if need to flush internal L2 cache */
372 if (!((struct imx6_cpu_pm_info *)
373 suspend_ocram_base)->l2_base.vbase)
374 flush_cache_all();
375 imx6_suspend_in_ocram_fn(suspend_ocram_base);
376 }
377
378 return 0;
379 }
380
imx6q_pm_enter(suspend_state_t state)381 static int imx6q_pm_enter(suspend_state_t state)
382 {
383 switch (state) {
384 case PM_SUSPEND_STANDBY:
385 imx6_set_lpm(STOP_POWER_ON);
386 imx6_set_int_mem_clk_lpm(true);
387 imx_gpc_pre_suspend(false);
388 if (cpu_is_imx6sl())
389 imx6sl_set_wait_clk(true);
390 /* Zzz ... */
391 cpu_do_idle();
392 if (cpu_is_imx6sl())
393 imx6sl_set_wait_clk(false);
394 imx_gpc_post_resume();
395 imx6_set_lpm(WAIT_CLOCKED);
396 break;
397 case PM_SUSPEND_MEM:
398 imx6_set_lpm(STOP_POWER_OFF);
399 imx6_set_int_mem_clk_lpm(false);
400 imx6q_enable_wb(true);
401 /*
402 * For suspend into ocram, asm code already take care of
403 * RBC setting, so we do NOT need to do that here.
404 */
405 if (!imx6_suspend_in_ocram_fn)
406 imx6_enable_rbc(true);
407 imx_gpc_pre_suspend(true);
408 imx_anatop_pre_suspend();
409 /* Zzz ... */
410 cpu_suspend(0, imx6q_suspend_finish);
411 if (cpu_is_imx6q() || cpu_is_imx6dl())
412 imx_smp_prepare();
413 imx_anatop_post_resume();
414 imx_gpc_post_resume();
415 imx6_enable_rbc(false);
416 imx6q_enable_wb(false);
417 imx6_set_int_mem_clk_lpm(true);
418 imx6_set_lpm(WAIT_CLOCKED);
419 break;
420 default:
421 return -EINVAL;
422 }
423
424 return 0;
425 }
426
imx6q_pm_valid(suspend_state_t state)427 static int imx6q_pm_valid(suspend_state_t state)
428 {
429 return (state == PM_SUSPEND_STANDBY || state == PM_SUSPEND_MEM);
430 }
431
432 static const struct platform_suspend_ops imx6q_pm_ops = {
433 .enter = imx6q_pm_enter,
434 .valid = imx6q_pm_valid,
435 };
436
imx6_pm_get_base(struct imx6_pm_base * base,const char * compat)437 static int __init imx6_pm_get_base(struct imx6_pm_base *base,
438 const char *compat)
439 {
440 struct device_node *node;
441 struct resource res;
442 int ret = 0;
443
444 node = of_find_compatible_node(NULL, NULL, compat);
445 if (!node)
446 return -ENODEV;
447
448 ret = of_address_to_resource(node, 0, &res);
449 if (ret)
450 goto put_node;
451
452 base->pbase = res.start;
453 base->vbase = ioremap(res.start, resource_size(&res));
454 if (!base->vbase)
455 ret = -ENOMEM;
456
457 put_node:
458 of_node_put(node);
459 return ret;
460 }
461
imx6q_suspend_init(const struct imx6_pm_socdata * socdata)462 static int __init imx6q_suspend_init(const struct imx6_pm_socdata *socdata)
463 {
464 phys_addr_t ocram_pbase;
465 struct device_node *node;
466 struct platform_device *pdev;
467 struct imx6_cpu_pm_info *pm_info;
468 struct gen_pool *ocram_pool;
469 unsigned long ocram_base;
470 int i, ret = 0;
471 const u32 *mmdc_offset_array;
472
473 suspend_set_ops(&imx6q_pm_ops);
474
475 if (!socdata) {
476 pr_warn("%s: invalid argument!\n", __func__);
477 return -EINVAL;
478 }
479
480 node = of_find_compatible_node(NULL, NULL, "mmio-sram");
481 if (!node) {
482 pr_warn("%s: failed to find ocram node!\n", __func__);
483 return -ENODEV;
484 }
485
486 pdev = of_find_device_by_node(node);
487 if (!pdev) {
488 pr_warn("%s: failed to find ocram device!\n", __func__);
489 ret = -ENODEV;
490 goto put_node;
491 }
492
493 ocram_pool = gen_pool_get(&pdev->dev, NULL);
494 if (!ocram_pool) {
495 pr_warn("%s: ocram pool unavailable!\n", __func__);
496 ret = -ENODEV;
497 goto put_device;
498 }
499
500 ocram_base = gen_pool_alloc(ocram_pool, MX6Q_SUSPEND_OCRAM_SIZE);
501 if (!ocram_base) {
502 pr_warn("%s: unable to alloc ocram!\n", __func__);
503 ret = -ENOMEM;
504 goto put_device;
505 }
506
507 ocram_pbase = gen_pool_virt_to_phys(ocram_pool, ocram_base);
508
509 suspend_ocram_base = __arm_ioremap_exec(ocram_pbase,
510 MX6Q_SUSPEND_OCRAM_SIZE, false);
511
512 memset(suspend_ocram_base, 0, sizeof(*pm_info));
513 pm_info = suspend_ocram_base;
514 pm_info->pbase = ocram_pbase;
515 pm_info->resume_addr = __pa_symbol(v7_cpu_resume);
516 pm_info->pm_info_size = sizeof(*pm_info);
517
518 /*
519 * ccm physical address is not used by asm code currently,
520 * so get ccm virtual address directly.
521 */
522 pm_info->ccm_base.vbase = ccm_base;
523
524 ret = imx6_pm_get_base(&pm_info->mmdc_base, socdata->mmdc_compat);
525 if (ret) {
526 pr_warn("%s: failed to get mmdc base %d!\n", __func__, ret);
527 goto put_device;
528 }
529
530 ret = imx6_pm_get_base(&pm_info->src_base, socdata->src_compat);
531 if (ret) {
532 pr_warn("%s: failed to get src base %d!\n", __func__, ret);
533 goto src_map_failed;
534 }
535
536 ret = imx6_pm_get_base(&pm_info->iomuxc_base, socdata->iomuxc_compat);
537 if (ret) {
538 pr_warn("%s: failed to get iomuxc base %d!\n", __func__, ret);
539 goto iomuxc_map_failed;
540 }
541
542 ret = imx6_pm_get_base(&pm_info->gpc_base, socdata->gpc_compat);
543 if (ret) {
544 pr_warn("%s: failed to get gpc base %d!\n", __func__, ret);
545 goto gpc_map_failed;
546 }
547
548 if (socdata->pl310_compat) {
549 ret = imx6_pm_get_base(&pm_info->l2_base, socdata->pl310_compat);
550 if (ret) {
551 pr_warn("%s: failed to get pl310-cache base %d!\n",
552 __func__, ret);
553 goto pl310_cache_map_failed;
554 }
555 }
556
557 pm_info->ddr_type = imx_mmdc_get_ddr_type();
558 pm_info->mmdc_io_num = socdata->mmdc_io_num;
559 mmdc_offset_array = socdata->mmdc_io_offset;
560
561 for (i = 0; i < pm_info->mmdc_io_num; i++) {
562 pm_info->mmdc_io_val[i][0] =
563 mmdc_offset_array[i];
564 pm_info->mmdc_io_val[i][1] =
565 readl_relaxed(pm_info->iomuxc_base.vbase +
566 mmdc_offset_array[i]);
567 }
568
569 imx6_suspend_in_ocram_fn = fncpy(
570 suspend_ocram_base + sizeof(*pm_info),
571 &imx6_suspend,
572 MX6Q_SUSPEND_OCRAM_SIZE - sizeof(*pm_info));
573
574 goto put_device;
575
576 pl310_cache_map_failed:
577 iounmap(pm_info->gpc_base.vbase);
578 gpc_map_failed:
579 iounmap(pm_info->iomuxc_base.vbase);
580 iomuxc_map_failed:
581 iounmap(pm_info->src_base.vbase);
582 src_map_failed:
583 iounmap(pm_info->mmdc_base.vbase);
584 put_device:
585 put_device(&pdev->dev);
586 put_node:
587 of_node_put(node);
588
589 return ret;
590 }
591
imx6_pm_common_init(const struct imx6_pm_socdata * socdata)592 static void __init imx6_pm_common_init(const struct imx6_pm_socdata
593 *socdata)
594 {
595 struct regmap *gpr;
596 int ret;
597
598 WARN_ON(!ccm_base);
599
600 if (IS_ENABLED(CONFIG_SUSPEND)) {
601 ret = imx6q_suspend_init(socdata);
602 if (ret)
603 pr_warn("%s: No DDR LPM support with suspend %d!\n",
604 __func__, ret);
605 }
606
607 /*
608 * This is for SW workaround step #1 of ERR007265, see comments
609 * in imx6_set_lpm for details of this errata.
610 * Force IOMUXC irq pending, so that the interrupt to GPC can be
611 * used to deassert dsm_request signal when the signal gets
612 * asserted unexpectedly.
613 */
614 gpr = syscon_regmap_lookup_by_compatible("fsl,imx6q-iomuxc-gpr");
615 if (!IS_ERR(gpr))
616 regmap_update_bits(gpr, IOMUXC_GPR1, IMX6Q_GPR1_GINT,
617 IMX6Q_GPR1_GINT);
618 }
619
imx6_pm_stby_poweroff(void)620 static void imx6_pm_stby_poweroff(void)
621 {
622 gic_cpu_if_down(0);
623 imx6_set_lpm(STOP_POWER_OFF);
624 imx6q_suspend_finish(0);
625
626 mdelay(1000);
627
628 pr_emerg("Unable to poweroff system\n");
629 }
630
imx6_pm_stby_poweroff_probe(void)631 static int imx6_pm_stby_poweroff_probe(void)
632 {
633 if (pm_power_off) {
634 pr_warn("%s: pm_power_off already claimed %p %ps!\n",
635 __func__, pm_power_off, pm_power_off);
636 return -EBUSY;
637 }
638
639 pm_power_off = imx6_pm_stby_poweroff;
640 return 0;
641 }
642
imx6_pm_ccm_init(const char * ccm_compat)643 void __init imx6_pm_ccm_init(const char *ccm_compat)
644 {
645 struct device_node *np;
646 u32 val;
647
648 np = of_find_compatible_node(NULL, NULL, ccm_compat);
649 ccm_base = of_iomap(np, 0);
650 BUG_ON(!ccm_base);
651
652 /*
653 * Initialize CCM_CLPCR_LPM into RUN mode to avoid ARM core
654 * clock being shut down unexpectedly by WAIT mode.
655 */
656 val = readl_relaxed(ccm_base + CLPCR);
657 val &= ~BM_CLPCR_LPM;
658 writel_relaxed(val, ccm_base + CLPCR);
659
660 if (of_property_read_bool(np, "fsl,pmic-stby-poweroff"))
661 imx6_pm_stby_poweroff_probe();
662
663 of_node_put(np);
664 }
665
imx6q_pm_init(void)666 void __init imx6q_pm_init(void)
667 {
668 imx6_pm_common_init(&imx6q_pm_data);
669 }
670
imx6dl_pm_init(void)671 void __init imx6dl_pm_init(void)
672 {
673 imx6_pm_common_init(&imx6dl_pm_data);
674 }
675
imx6sl_pm_init(void)676 void __init imx6sl_pm_init(void)
677 {
678 struct regmap *gpr;
679
680 if (cpu_is_imx6sl()) {
681 imx6_pm_common_init(&imx6sl_pm_data);
682 } else {
683 imx6_pm_common_init(&imx6sll_pm_data);
684 gpr = syscon_regmap_lookup_by_compatible("fsl,imx6q-iomuxc-gpr");
685 if (!IS_ERR(gpr))
686 regmap_update_bits(gpr, IOMUXC_GPR5,
687 IMX6SLL_GPR5_AFCG_X_BYPASS_MASK, 0);
688 }
689 }
690
imx6sx_pm_init(void)691 void __init imx6sx_pm_init(void)
692 {
693 imx6_pm_common_init(&imx6sx_pm_data);
694 }
695
imx6ul_pm_init(void)696 void __init imx6ul_pm_init(void)
697 {
698 imx6_pm_common_init(&imx6ul_pm_data);
699 }
700