1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3  * Samsung EXYNOS4x12 FIMC-IS (Imaging Subsystem) driver
4  *
5  * Copyright (C) 2013 Samsung Electronics Co., Ltd.
6  *
7  * Authors: Sylwester Nawrocki <s.nawrocki@samsung.com>
8  *          Younghwan Joo <yhwan.joo@samsung.com>
9  */
10 #define pr_fmt(fmt) "%s:%d " fmt, __func__, __LINE__
11 
12 #include <linux/device.h>
13 #include <linux/debugfs.h>
14 #include <linux/delay.h>
15 #include <linux/errno.h>
16 #include <linux/firmware.h>
17 #include <linux/interrupt.h>
18 #include <linux/kernel.h>
19 #include <linux/module.h>
20 #include <linux/i2c.h>
21 #include <linux/of_irq.h>
22 #include <linux/of_address.h>
23 #include <linux/of_graph.h>
24 #include <linux/of_platform.h>
25 #include <linux/platform_device.h>
26 #include <linux/pm_runtime.h>
27 #include <linux/slab.h>
28 #include <linux/types.h>
29 #include <linux/videodev2.h>
30 #include <media/videobuf2-dma-contig.h>
31 
32 #include "media-dev.h"
33 #include "fimc-is.h"
34 #include "fimc-is-command.h"
35 #include "fimc-is-errno.h"
36 #include "fimc-is-i2c.h"
37 #include "fimc-is-param.h"
38 #include "fimc-is-regs.h"
39 
40 
41 static char *fimc_is_clocks[ISS_CLKS_MAX] = {
42 	[ISS_CLK_PPMUISPX]		= "ppmuispx",
43 	[ISS_CLK_PPMUISPMX]		= "ppmuispmx",
44 	[ISS_CLK_LITE0]			= "lite0",
45 	[ISS_CLK_LITE1]			= "lite1",
46 	[ISS_CLK_MPLL]			= "mpll",
47 	[ISS_CLK_ISP]			= "isp",
48 	[ISS_CLK_DRC]			= "drc",
49 	[ISS_CLK_FD]			= "fd",
50 	[ISS_CLK_MCUISP]		= "mcuisp",
51 	[ISS_CLK_GICISP]		= "gicisp",
52 	[ISS_CLK_PWM_ISP]		= "pwm_isp",
53 	[ISS_CLK_MCUCTL_ISP]		= "mcuctl_isp",
54 	[ISS_CLK_UART]			= "uart",
55 	[ISS_CLK_ISP_DIV0]		= "ispdiv0",
56 	[ISS_CLK_ISP_DIV1]		= "ispdiv1",
57 	[ISS_CLK_MCUISP_DIV0]		= "mcuispdiv0",
58 	[ISS_CLK_MCUISP_DIV1]		= "mcuispdiv1",
59 	[ISS_CLK_ACLK200]		= "aclk200",
60 	[ISS_CLK_ACLK200_DIV]		= "div_aclk200",
61 	[ISS_CLK_ACLK400MCUISP]		= "aclk400mcuisp",
62 	[ISS_CLK_ACLK400MCUISP_DIV]	= "div_aclk400mcuisp",
63 };
64 
fimc_is_put_clocks(struct fimc_is * is)65 static void fimc_is_put_clocks(struct fimc_is *is)
66 {
67 	int i;
68 
69 	for (i = 0; i < ISS_CLKS_MAX; i++) {
70 		if (IS_ERR(is->clocks[i]))
71 			continue;
72 		clk_put(is->clocks[i]);
73 		is->clocks[i] = ERR_PTR(-EINVAL);
74 	}
75 }
76 
fimc_is_get_clocks(struct fimc_is * is)77 static int fimc_is_get_clocks(struct fimc_is *is)
78 {
79 	int i, ret;
80 
81 	for (i = 0; i < ISS_CLKS_MAX; i++)
82 		is->clocks[i] = ERR_PTR(-EINVAL);
83 
84 	for (i = 0; i < ISS_CLKS_MAX; i++) {
85 		is->clocks[i] = clk_get(&is->pdev->dev, fimc_is_clocks[i]);
86 		if (IS_ERR(is->clocks[i])) {
87 			ret = PTR_ERR(is->clocks[i]);
88 			goto err;
89 		}
90 	}
91 
92 	return 0;
93 err:
94 	fimc_is_put_clocks(is);
95 	dev_err(&is->pdev->dev, "failed to get clock: %s\n",
96 		fimc_is_clocks[i]);
97 	return ret;
98 }
99 
fimc_is_setup_clocks(struct fimc_is * is)100 static int fimc_is_setup_clocks(struct fimc_is *is)
101 {
102 	int ret;
103 
104 	ret = clk_set_parent(is->clocks[ISS_CLK_ACLK200],
105 					is->clocks[ISS_CLK_ACLK200_DIV]);
106 	if (ret < 0)
107 		return ret;
108 
109 	ret = clk_set_parent(is->clocks[ISS_CLK_ACLK400MCUISP],
110 					is->clocks[ISS_CLK_ACLK400MCUISP_DIV]);
111 	if (ret < 0)
112 		return ret;
113 
114 	ret = clk_set_rate(is->clocks[ISS_CLK_ISP_DIV0], ACLK_AXI_FREQUENCY);
115 	if (ret < 0)
116 		return ret;
117 
118 	ret = clk_set_rate(is->clocks[ISS_CLK_ISP_DIV1], ACLK_AXI_FREQUENCY);
119 	if (ret < 0)
120 		return ret;
121 
122 	ret = clk_set_rate(is->clocks[ISS_CLK_MCUISP_DIV0],
123 					ATCLK_MCUISP_FREQUENCY);
124 	if (ret < 0)
125 		return ret;
126 
127 	return clk_set_rate(is->clocks[ISS_CLK_MCUISP_DIV1],
128 					ATCLK_MCUISP_FREQUENCY);
129 }
130 
fimc_is_enable_clocks(struct fimc_is * is)131 static int fimc_is_enable_clocks(struct fimc_is *is)
132 {
133 	int i, ret;
134 
135 	for (i = 0; i < ISS_GATE_CLKS_MAX; i++) {
136 		if (IS_ERR(is->clocks[i]))
137 			continue;
138 		ret = clk_prepare_enable(is->clocks[i]);
139 		if (ret < 0) {
140 			dev_err(&is->pdev->dev, "clock %s enable failed\n",
141 				fimc_is_clocks[i]);
142 			for (--i; i >= 0; i--)
143 				clk_disable_unprepare(is->clocks[i]);
144 			return ret;
145 		}
146 		pr_debug("enabled clock: %s\n", fimc_is_clocks[i]);
147 	}
148 	return 0;
149 }
150 
fimc_is_disable_clocks(struct fimc_is * is)151 static void fimc_is_disable_clocks(struct fimc_is *is)
152 {
153 	int i;
154 
155 	for (i = 0; i < ISS_GATE_CLKS_MAX; i++) {
156 		if (!IS_ERR(is->clocks[i])) {
157 			clk_disable_unprepare(is->clocks[i]);
158 			pr_debug("disabled clock: %s\n", fimc_is_clocks[i]);
159 		}
160 	}
161 }
162 
fimc_is_parse_sensor_config(struct fimc_is * is,unsigned int index,struct device_node * node)163 static int fimc_is_parse_sensor_config(struct fimc_is *is, unsigned int index,
164 						struct device_node *node)
165 {
166 	struct fimc_is_sensor *sensor = &is->sensor[index];
167 	struct device_node *ep, *port;
168 	u32 tmp = 0;
169 	int ret;
170 
171 	sensor->drvdata = fimc_is_sensor_get_drvdata(node);
172 	if (!sensor->drvdata) {
173 		dev_err(&is->pdev->dev, "no driver data found for: %pOF\n",
174 							 node);
175 		return -EINVAL;
176 	}
177 
178 	ep = of_graph_get_next_endpoint(node, NULL);
179 	if (!ep)
180 		return -ENXIO;
181 
182 	port = of_graph_get_remote_port(ep);
183 	of_node_put(ep);
184 	if (!port)
185 		return -ENXIO;
186 
187 	/* Use MIPI-CSIS channel id to determine the ISP I2C bus index. */
188 	ret = of_property_read_u32(port, "reg", &tmp);
189 	if (ret < 0) {
190 		dev_err(&is->pdev->dev, "reg property not found at: %pOF\n",
191 							 port);
192 		of_node_put(port);
193 		return ret;
194 	}
195 
196 	of_node_put(port);
197 	sensor->i2c_bus = tmp - FIMC_INPUT_MIPI_CSI2_0;
198 	return 0;
199 }
200 
fimc_is_register_subdevs(struct fimc_is * is)201 static int fimc_is_register_subdevs(struct fimc_is *is)
202 {
203 	struct device_node *i2c_bus, *child;
204 	int ret, index = 0;
205 
206 	ret = fimc_isp_subdev_create(&is->isp);
207 	if (ret < 0)
208 		return ret;
209 
210 	for_each_compatible_node(i2c_bus, NULL, FIMC_IS_I2C_COMPATIBLE) {
211 		for_each_available_child_of_node(i2c_bus, child) {
212 			ret = fimc_is_parse_sensor_config(is, index, child);
213 
214 			if (ret < 0 || index >= FIMC_IS_SENSORS_NUM) {
215 				of_node_put(child);
216 				of_node_put(i2c_bus);
217 				return ret;
218 			}
219 			index++;
220 		}
221 	}
222 	return 0;
223 }
224 
fimc_is_unregister_subdevs(struct fimc_is * is)225 static int fimc_is_unregister_subdevs(struct fimc_is *is)
226 {
227 	fimc_isp_subdev_destroy(&is->isp);
228 	return 0;
229 }
230 
fimc_is_load_setfile(struct fimc_is * is,char * file_name)231 static int fimc_is_load_setfile(struct fimc_is *is, char *file_name)
232 {
233 	const struct firmware *fw;
234 	void *buf;
235 	int ret;
236 
237 	ret = request_firmware(&fw, file_name, &is->pdev->dev);
238 	if (ret < 0) {
239 		dev_err(&is->pdev->dev, "firmware request failed (%d)\n", ret);
240 		return ret;
241 	}
242 	buf = is->memory.vaddr + is->setfile.base;
243 	memcpy(buf, fw->data, fw->size);
244 	fimc_is_mem_barrier();
245 	is->setfile.size = fw->size;
246 
247 	pr_debug("mem vaddr: %p, setfile buf: %p\n", is->memory.vaddr, buf);
248 
249 	memcpy(is->fw.setfile_info,
250 		fw->data + fw->size - FIMC_IS_SETFILE_INFO_LEN,
251 		FIMC_IS_SETFILE_INFO_LEN - 1);
252 
253 	is->fw.setfile_info[FIMC_IS_SETFILE_INFO_LEN - 1] = '\0';
254 	is->setfile.state = 1;
255 
256 	pr_debug("FIMC-IS setfile loaded: base: %#x, size: %zu B\n",
257 		 is->setfile.base, fw->size);
258 
259 	release_firmware(fw);
260 	return ret;
261 }
262 
fimc_is_cpu_set_power(struct fimc_is * is,int on)263 int fimc_is_cpu_set_power(struct fimc_is *is, int on)
264 {
265 	unsigned int timeout = FIMC_IS_POWER_ON_TIMEOUT;
266 
267 	if (on) {
268 		/* Disable watchdog */
269 		mcuctl_write(0, is, REG_WDT_ISP);
270 
271 		/* Cortex-A5 start address setting */
272 		mcuctl_write(is->memory.addr, is, MCUCTL_REG_BBOAR);
273 
274 		/* Enable and start Cortex-A5 */
275 		pmuisp_write(0x18000, is, REG_PMU_ISP_ARM_OPTION);
276 		pmuisp_write(0x1, is, REG_PMU_ISP_ARM_CONFIGURATION);
277 	} else {
278 		/* A5 power off */
279 		pmuisp_write(0x10000, is, REG_PMU_ISP_ARM_OPTION);
280 		pmuisp_write(0x0, is, REG_PMU_ISP_ARM_CONFIGURATION);
281 
282 		while (pmuisp_read(is, REG_PMU_ISP_ARM_STATUS) & 1) {
283 			if (timeout == 0)
284 				return -ETIME;
285 			timeout--;
286 			udelay(1);
287 		}
288 	}
289 
290 	return 0;
291 }
292 
293 /* Wait until @bit of @is->state is set to @state in the interrupt handler. */
fimc_is_wait_event(struct fimc_is * is,unsigned long bit,unsigned int state,unsigned int timeout)294 int fimc_is_wait_event(struct fimc_is *is, unsigned long bit,
295 		       unsigned int state, unsigned int timeout)
296 {
297 
298 	int ret = wait_event_timeout(is->irq_queue,
299 				     !state ^ test_bit(bit, &is->state),
300 				     timeout);
301 	if (ret == 0) {
302 		dev_WARN(&is->pdev->dev, "%s() timed out\n", __func__);
303 		return -ETIME;
304 	}
305 	return 0;
306 }
307 
fimc_is_start_firmware(struct fimc_is * is)308 int fimc_is_start_firmware(struct fimc_is *is)
309 {
310 	struct device *dev = &is->pdev->dev;
311 	int ret;
312 
313 	if (is->fw.f_w == NULL) {
314 		dev_err(dev, "firmware is not loaded\n");
315 		return -EINVAL;
316 	}
317 
318 	memcpy(is->memory.vaddr, is->fw.f_w->data, is->fw.f_w->size);
319 	wmb();
320 
321 	ret = fimc_is_cpu_set_power(is, 1);
322 	if (ret < 0)
323 		return ret;
324 
325 	ret = fimc_is_wait_event(is, IS_ST_A5_PWR_ON, 1,
326 				 msecs_to_jiffies(FIMC_IS_FW_LOAD_TIMEOUT));
327 	if (ret < 0)
328 		dev_err(dev, "FIMC-IS CPU power on failed\n");
329 
330 	return ret;
331 }
332 
333 /* Allocate working memory for the FIMC-IS CPU. */
fimc_is_alloc_cpu_memory(struct fimc_is * is)334 static int fimc_is_alloc_cpu_memory(struct fimc_is *is)
335 {
336 	struct device *dev = &is->pdev->dev;
337 
338 	is->memory.vaddr = dma_alloc_coherent(dev, FIMC_IS_CPU_MEM_SIZE,
339 					      &is->memory.addr, GFP_KERNEL);
340 	if (is->memory.vaddr == NULL)
341 		return -ENOMEM;
342 
343 	is->memory.size = FIMC_IS_CPU_MEM_SIZE;
344 
345 	dev_info(dev, "FIMC-IS CPU memory base: %pad\n", &is->memory.addr);
346 
347 	if (((u32)is->memory.addr) & FIMC_IS_FW_ADDR_MASK) {
348 		dev_err(dev, "invalid firmware memory alignment: %#x\n",
349 			(u32)is->memory.addr);
350 		dma_free_coherent(dev, is->memory.size, is->memory.vaddr,
351 				  is->memory.addr);
352 		return -EIO;
353 	}
354 
355 	is->is_p_region = (struct is_region *)(is->memory.vaddr +
356 				FIMC_IS_CPU_MEM_SIZE - FIMC_IS_REGION_SIZE);
357 
358 	is->is_dma_p_region = is->memory.addr +
359 				FIMC_IS_CPU_MEM_SIZE - FIMC_IS_REGION_SIZE;
360 
361 	is->is_shared_region = (struct is_share_region *)(is->memory.vaddr +
362 				FIMC_IS_SHARED_REGION_OFFSET);
363 	return 0;
364 }
365 
fimc_is_free_cpu_memory(struct fimc_is * is)366 static void fimc_is_free_cpu_memory(struct fimc_is *is)
367 {
368 	struct device *dev = &is->pdev->dev;
369 
370 	if (is->memory.vaddr == NULL)
371 		return;
372 
373 	dma_free_coherent(dev, is->memory.size, is->memory.vaddr,
374 			  is->memory.addr);
375 }
376 
fimc_is_load_firmware(const struct firmware * fw,void * context)377 static void fimc_is_load_firmware(const struct firmware *fw, void *context)
378 {
379 	struct fimc_is *is = context;
380 	struct device *dev = &is->pdev->dev;
381 	void *buf;
382 	int ret;
383 
384 	if (fw == NULL) {
385 		dev_err(dev, "firmware request failed\n");
386 		return;
387 	}
388 	mutex_lock(&is->lock);
389 
390 	if (fw->size < FIMC_IS_FW_SIZE_MIN || fw->size > FIMC_IS_FW_SIZE_MAX) {
391 		dev_err(dev, "wrong firmware size: %zu\n", fw->size);
392 		goto done;
393 	}
394 
395 	is->fw.size = fw->size;
396 
397 	ret = fimc_is_alloc_cpu_memory(is);
398 	if (ret < 0) {
399 		dev_err(dev, "failed to allocate FIMC-IS CPU memory\n");
400 		goto done;
401 	}
402 
403 	memcpy(is->memory.vaddr, fw->data, fw->size);
404 	wmb();
405 
406 	/* Read firmware description. */
407 	buf = (void *)(is->memory.vaddr + fw->size - FIMC_IS_FW_DESC_LEN);
408 	memcpy(&is->fw.info, buf, FIMC_IS_FW_INFO_LEN);
409 	is->fw.info[FIMC_IS_FW_INFO_LEN] = 0;
410 
411 	buf = (void *)(is->memory.vaddr + fw->size - FIMC_IS_FW_VER_LEN);
412 	memcpy(&is->fw.version, buf, FIMC_IS_FW_VER_LEN);
413 	is->fw.version[FIMC_IS_FW_VER_LEN - 1] = 0;
414 
415 	is->fw.state = 1;
416 
417 	dev_info(dev, "loaded firmware: %s, rev. %s\n",
418 		 is->fw.info, is->fw.version);
419 	dev_dbg(dev, "FW size: %zu, DMA addr: %pad\n", fw->size, &is->memory.addr);
420 
421 	is->is_shared_region->chip_id = 0xe4412;
422 	is->is_shared_region->chip_rev_no = 1;
423 
424 	fimc_is_mem_barrier();
425 
426 	/*
427 	 * FIXME: The firmware is not being released for now, as it is
428 	 * needed around for copying to the IS working memory every
429 	 * time before the Cortex-A5 is restarted.
430 	 */
431 	release_firmware(is->fw.f_w);
432 	is->fw.f_w = fw;
433 done:
434 	mutex_unlock(&is->lock);
435 }
436 
fimc_is_request_firmware(struct fimc_is * is,const char * fw_name)437 static int fimc_is_request_firmware(struct fimc_is *is, const char *fw_name)
438 {
439 	return request_firmware_nowait(THIS_MODULE,
440 				FW_ACTION_UEVENT, fw_name, &is->pdev->dev,
441 				GFP_KERNEL, is, fimc_is_load_firmware);
442 }
443 
444 /* General IS interrupt handler */
fimc_is_general_irq_handler(struct fimc_is * is)445 static void fimc_is_general_irq_handler(struct fimc_is *is)
446 {
447 	is->i2h_cmd.cmd = mcuctl_read(is, MCUCTL_REG_ISSR(10));
448 
449 	switch (is->i2h_cmd.cmd) {
450 	case IHC_GET_SENSOR_NUM:
451 		fimc_is_hw_get_params(is, 1);
452 		fimc_is_hw_wait_intmsr0_intmsd0(is);
453 		fimc_is_hw_set_sensor_num(is);
454 		pr_debug("ISP FW version: %#x\n", is->i2h_cmd.args[0]);
455 		break;
456 	case IHC_SET_FACE_MARK:
457 	case IHC_FRAME_DONE:
458 		fimc_is_hw_get_params(is, 2);
459 		break;
460 	case IHC_SET_SHOT_MARK:
461 	case IHC_AA_DONE:
462 	case IH_REPLY_DONE:
463 		fimc_is_hw_get_params(is, 3);
464 		break;
465 	case IH_REPLY_NOT_DONE:
466 		fimc_is_hw_get_params(is, 4);
467 		break;
468 	case IHC_NOT_READY:
469 		break;
470 	default:
471 		pr_info("unknown command: %#x\n", is->i2h_cmd.cmd);
472 	}
473 
474 	fimc_is_fw_clear_irq1(is, FIMC_IS_INT_GENERAL);
475 
476 	switch (is->i2h_cmd.cmd) {
477 	case IHC_GET_SENSOR_NUM:
478 		fimc_is_hw_set_intgr0_gd0(is);
479 		set_bit(IS_ST_A5_PWR_ON, &is->state);
480 		break;
481 
482 	case IHC_SET_SHOT_MARK:
483 		break;
484 
485 	case IHC_SET_FACE_MARK:
486 		is->fd_header.count = is->i2h_cmd.args[0];
487 		is->fd_header.index = is->i2h_cmd.args[1];
488 		is->fd_header.offset = 0;
489 		break;
490 
491 	case IHC_FRAME_DONE:
492 		break;
493 
494 	case IHC_AA_DONE:
495 		pr_debug("AA_DONE - %d, %d, %d\n", is->i2h_cmd.args[0],
496 			 is->i2h_cmd.args[1], is->i2h_cmd.args[2]);
497 		break;
498 
499 	case IH_REPLY_DONE:
500 		pr_debug("ISR_DONE: args[0]: %#x\n", is->i2h_cmd.args[0]);
501 
502 		switch (is->i2h_cmd.args[0]) {
503 		case HIC_PREVIEW_STILL...HIC_CAPTURE_VIDEO:
504 			/* Get CAC margin */
505 			set_bit(IS_ST_CHANGE_MODE, &is->state);
506 			is->isp.cac_margin_x = is->i2h_cmd.args[1];
507 			is->isp.cac_margin_y = is->i2h_cmd.args[2];
508 			pr_debug("CAC margin (x,y): (%d,%d)\n",
509 				 is->isp.cac_margin_x, is->isp.cac_margin_y);
510 			break;
511 
512 		case HIC_STREAM_ON:
513 			clear_bit(IS_ST_STREAM_OFF, &is->state);
514 			set_bit(IS_ST_STREAM_ON, &is->state);
515 			break;
516 
517 		case HIC_STREAM_OFF:
518 			clear_bit(IS_ST_STREAM_ON, &is->state);
519 			set_bit(IS_ST_STREAM_OFF, &is->state);
520 			break;
521 
522 		case HIC_SET_PARAMETER:
523 			is->config[is->config_index].p_region_index[0] = 0;
524 			is->config[is->config_index].p_region_index[1] = 0;
525 			set_bit(IS_ST_BLOCK_CMD_CLEARED, &is->state);
526 			pr_debug("HIC_SET_PARAMETER\n");
527 			break;
528 
529 		case HIC_GET_PARAMETER:
530 			break;
531 
532 		case HIC_SET_TUNE:
533 			break;
534 
535 		case HIC_GET_STATUS:
536 			break;
537 
538 		case HIC_OPEN_SENSOR:
539 			set_bit(IS_ST_OPEN_SENSOR, &is->state);
540 			pr_debug("data lanes: %d, settle line: %d\n",
541 				 is->i2h_cmd.args[2], is->i2h_cmd.args[1]);
542 			break;
543 
544 		case HIC_CLOSE_SENSOR:
545 			clear_bit(IS_ST_OPEN_SENSOR, &is->state);
546 			is->sensor_index = 0;
547 			break;
548 
549 		case HIC_MSG_TEST:
550 			pr_debug("config MSG level completed\n");
551 			break;
552 
553 		case HIC_POWER_DOWN:
554 			clear_bit(IS_ST_PWR_SUBIP_ON, &is->state);
555 			break;
556 
557 		case HIC_GET_SET_FILE_ADDR:
558 			is->setfile.base = is->i2h_cmd.args[1];
559 			set_bit(IS_ST_SETFILE_LOADED, &is->state);
560 			break;
561 
562 		case HIC_LOAD_SET_FILE:
563 			set_bit(IS_ST_SETFILE_LOADED, &is->state);
564 			break;
565 		}
566 		break;
567 
568 	case IH_REPLY_NOT_DONE:
569 		pr_err("ISR_NDONE: %d: %#x, %s\n", is->i2h_cmd.args[0],
570 		       is->i2h_cmd.args[1],
571 		       fimc_is_strerr(is->i2h_cmd.args[1]));
572 
573 		if (is->i2h_cmd.args[1] & IS_ERROR_TIME_OUT_FLAG)
574 			pr_err("IS_ERROR_TIME_OUT\n");
575 
576 		switch (is->i2h_cmd.args[1]) {
577 		case IS_ERROR_SET_PARAMETER:
578 			fimc_is_mem_barrier();
579 		}
580 
581 		switch (is->i2h_cmd.args[0]) {
582 		case HIC_SET_PARAMETER:
583 			is->config[is->config_index].p_region_index[0] = 0;
584 			is->config[is->config_index].p_region_index[1] = 0;
585 			set_bit(IS_ST_BLOCK_CMD_CLEARED, &is->state);
586 			break;
587 		}
588 		break;
589 
590 	case IHC_NOT_READY:
591 		pr_err("IS control sequence error: Not Ready\n");
592 		break;
593 	}
594 
595 	wake_up(&is->irq_queue);
596 }
597 
fimc_is_irq_handler(int irq,void * priv)598 static irqreturn_t fimc_is_irq_handler(int irq, void *priv)
599 {
600 	struct fimc_is *is = priv;
601 	unsigned long flags;
602 	u32 status;
603 
604 	spin_lock_irqsave(&is->slock, flags);
605 	status = mcuctl_read(is, MCUCTL_REG_INTSR1);
606 
607 	if (status & (1UL << FIMC_IS_INT_GENERAL))
608 		fimc_is_general_irq_handler(is);
609 
610 	if (status & (1UL << FIMC_IS_INT_FRAME_DONE_ISP))
611 		fimc_isp_irq_handler(is);
612 
613 	spin_unlock_irqrestore(&is->slock, flags);
614 	return IRQ_HANDLED;
615 }
616 
fimc_is_hw_open_sensor(struct fimc_is * is,struct fimc_is_sensor * sensor)617 static int fimc_is_hw_open_sensor(struct fimc_is *is,
618 				  struct fimc_is_sensor *sensor)
619 {
620 	struct sensor_open_extended *soe = (void *)&is->is_p_region->shared;
621 
622 	fimc_is_hw_wait_intmsr0_intmsd0(is);
623 
624 	soe->self_calibration_mode = 1;
625 	soe->actuator_type = 0;
626 	soe->mipi_lane_num = 0;
627 	soe->mclk = 0;
628 	soe->mipi_speed	= 0;
629 	soe->fast_open_sensor = 0;
630 	soe->i2c_sclk = 88000000;
631 
632 	fimc_is_mem_barrier();
633 
634 	/*
635 	 * Some user space use cases hang up here without this
636 	 * empirically chosen delay.
637 	 */
638 	udelay(100);
639 
640 	mcuctl_write(HIC_OPEN_SENSOR, is, MCUCTL_REG_ISSR(0));
641 	mcuctl_write(is->sensor_index, is, MCUCTL_REG_ISSR(1));
642 	mcuctl_write(sensor->drvdata->id, is, MCUCTL_REG_ISSR(2));
643 	mcuctl_write(sensor->i2c_bus, is, MCUCTL_REG_ISSR(3));
644 	mcuctl_write(is->is_dma_p_region, is, MCUCTL_REG_ISSR(4));
645 
646 	fimc_is_hw_set_intgr0_gd0(is);
647 
648 	return fimc_is_wait_event(is, IS_ST_OPEN_SENSOR, 1,
649 				  sensor->drvdata->open_timeout);
650 }
651 
652 
fimc_is_hw_initialize(struct fimc_is * is)653 int fimc_is_hw_initialize(struct fimc_is *is)
654 {
655 	static const int config_ids[] = {
656 		IS_SC_PREVIEW_STILL, IS_SC_PREVIEW_VIDEO,
657 		IS_SC_CAPTURE_STILL, IS_SC_CAPTURE_VIDEO
658 	};
659 	struct device *dev = &is->pdev->dev;
660 	u32 prev_id;
661 	int i, ret;
662 
663 	/* Sensor initialization. Only one sensor is currently supported. */
664 	ret = fimc_is_hw_open_sensor(is, &is->sensor[0]);
665 	if (ret < 0)
666 		return ret;
667 
668 	/* Get the setfile address. */
669 	fimc_is_hw_get_setfile_addr(is);
670 
671 	ret = fimc_is_wait_event(is, IS_ST_SETFILE_LOADED, 1,
672 				 FIMC_IS_CONFIG_TIMEOUT);
673 	if (ret < 0) {
674 		dev_err(dev, "get setfile address timed out\n");
675 		return ret;
676 	}
677 	pr_debug("setfile.base: %#x\n", is->setfile.base);
678 
679 	/* Load the setfile. */
680 	fimc_is_load_setfile(is, FIMC_IS_SETFILE_6A3);
681 	clear_bit(IS_ST_SETFILE_LOADED, &is->state);
682 	fimc_is_hw_load_setfile(is);
683 	ret = fimc_is_wait_event(is, IS_ST_SETFILE_LOADED, 1,
684 				 FIMC_IS_CONFIG_TIMEOUT);
685 	if (ret < 0) {
686 		dev_err(dev, "loading setfile timed out\n");
687 		return ret;
688 	}
689 
690 	pr_debug("setfile: base: %#x, size: %d\n",
691 		 is->setfile.base, is->setfile.size);
692 	pr_info("FIMC-IS Setfile info: %s\n", is->fw.setfile_info);
693 
694 	/* Check magic number. */
695 	if (is->is_p_region->shared[MAX_SHARED_COUNT - 1] !=
696 	    FIMC_IS_MAGIC_NUMBER) {
697 		dev_err(dev, "magic number error!\n");
698 		return -EIO;
699 	}
700 
701 	pr_debug("shared region: %pad, parameter region: %pad\n",
702 		 &is->memory.addr + FIMC_IS_SHARED_REGION_OFFSET,
703 		 &is->is_dma_p_region);
704 
705 	is->setfile.sub_index = 0;
706 
707 	/* Stream off. */
708 	fimc_is_hw_stream_off(is);
709 	ret = fimc_is_wait_event(is, IS_ST_STREAM_OFF, 1,
710 				 FIMC_IS_CONFIG_TIMEOUT);
711 	if (ret < 0) {
712 		dev_err(dev, "stream off timeout\n");
713 		return ret;
714 	}
715 
716 	/* Preserve previous mode. */
717 	prev_id = is->config_index;
718 
719 	/* Set initial parameter values. */
720 	for (i = 0; i < ARRAY_SIZE(config_ids); i++) {
721 		is->config_index = config_ids[i];
722 		fimc_is_set_initial_params(is);
723 		ret = fimc_is_itf_s_param(is, true);
724 		if (ret < 0) {
725 			is->config_index = prev_id;
726 			return ret;
727 		}
728 	}
729 	is->config_index = prev_id;
730 
731 	set_bit(IS_ST_INIT_DONE, &is->state);
732 	dev_info(dev, "initialization sequence completed (%d)\n",
733 						is->config_index);
734 	return 0;
735 }
736 
fimc_is_show(struct seq_file * s,void * data)737 static int fimc_is_show(struct seq_file *s, void *data)
738 {
739 	struct fimc_is *is = s->private;
740 	const u8 *buf = is->memory.vaddr + FIMC_IS_DEBUG_REGION_OFFSET;
741 
742 	if (is->memory.vaddr == NULL) {
743 		dev_err(&is->pdev->dev, "firmware memory is not initialized\n");
744 		return -EIO;
745 	}
746 
747 	seq_printf(s, "%s\n", buf);
748 	return 0;
749 }
750 
751 DEFINE_SHOW_ATTRIBUTE(fimc_is);
752 
fimc_is_debugfs_remove(struct fimc_is * is)753 static void fimc_is_debugfs_remove(struct fimc_is *is)
754 {
755 	debugfs_remove_recursive(is->debugfs_entry);
756 	is->debugfs_entry = NULL;
757 }
758 
fimc_is_debugfs_create(struct fimc_is * is)759 static void fimc_is_debugfs_create(struct fimc_is *is)
760 {
761 	is->debugfs_entry = debugfs_create_dir("fimc_is", NULL);
762 
763 	debugfs_create_file("fw_log", S_IRUGO, is->debugfs_entry, is,
764 			    &fimc_is_fops);
765 }
766 
767 static int fimc_is_runtime_resume(struct device *dev);
768 static int fimc_is_runtime_suspend(struct device *dev);
769 
fimc_is_probe(struct platform_device * pdev)770 static int fimc_is_probe(struct platform_device *pdev)
771 {
772 	struct device *dev = &pdev->dev;
773 	struct fimc_is *is;
774 	struct resource res;
775 	struct device_node *node;
776 	int ret;
777 
778 	is = devm_kzalloc(&pdev->dev, sizeof(*is), GFP_KERNEL);
779 	if (!is)
780 		return -ENOMEM;
781 
782 	is->pdev = pdev;
783 	is->isp.pdev = pdev;
784 
785 	init_waitqueue_head(&is->irq_queue);
786 	spin_lock_init(&is->slock);
787 	mutex_init(&is->lock);
788 
789 	ret = of_address_to_resource(dev->of_node, 0, &res);
790 	if (ret < 0)
791 		return ret;
792 
793 	is->regs = devm_ioremap_resource(dev, &res);
794 	if (IS_ERR(is->regs))
795 		return PTR_ERR(is->regs);
796 
797 	node = of_get_child_by_name(dev->of_node, "pmu");
798 	if (!node)
799 		return -ENODEV;
800 
801 	is->pmu_regs = of_iomap(node, 0);
802 	of_node_put(node);
803 	if (!is->pmu_regs)
804 		return -ENOMEM;
805 
806 	is->irq = irq_of_parse_and_map(dev->of_node, 0);
807 	if (!is->irq) {
808 		dev_err(dev, "no irq found\n");
809 		ret = -EINVAL;
810 		goto err_iounmap;
811 	}
812 
813 	ret = fimc_is_get_clocks(is);
814 	if (ret < 0)
815 		goto err_iounmap;
816 
817 	platform_set_drvdata(pdev, is);
818 
819 	ret = request_irq(is->irq, fimc_is_irq_handler, 0, dev_name(dev), is);
820 	if (ret < 0) {
821 		dev_err(dev, "irq request failed\n");
822 		goto err_clk;
823 	}
824 	pm_runtime_enable(dev);
825 
826 	if (!pm_runtime_enabled(dev)) {
827 		ret = fimc_is_runtime_resume(dev);
828 		if (ret < 0)
829 			goto err_irq;
830 	}
831 
832 	ret = pm_runtime_resume_and_get(dev);
833 	if (ret < 0)
834 		goto err_pm_disable;
835 
836 	vb2_dma_contig_set_max_seg_size(dev, DMA_BIT_MASK(32));
837 
838 	ret = devm_of_platform_populate(dev);
839 	if (ret < 0)
840 		goto err_pm;
841 
842 	/*
843 	 * Register FIMC-IS V4L2 subdevs to this driver. The video nodes
844 	 * will be created within the subdev's registered() callback.
845 	 */
846 	ret = fimc_is_register_subdevs(is);
847 	if (ret < 0)
848 		goto err_pm;
849 
850 	fimc_is_debugfs_create(is);
851 
852 	ret = fimc_is_request_firmware(is, FIMC_IS_FW_FILENAME);
853 	if (ret < 0)
854 		goto err_dfs;
855 
856 	pm_runtime_put_sync(dev);
857 
858 	dev_dbg(dev, "FIMC-IS registered successfully\n");
859 	return 0;
860 
861 err_dfs:
862 	fimc_is_debugfs_remove(is);
863 	fimc_is_unregister_subdevs(is);
864 err_pm:
865 	pm_runtime_put_noidle(dev);
866 	if (!pm_runtime_enabled(dev))
867 		fimc_is_runtime_suspend(dev);
868 err_pm_disable:
869 	pm_runtime_disable(dev);
870 err_irq:
871 	free_irq(is->irq, is);
872 err_clk:
873 	fimc_is_put_clocks(is);
874 err_iounmap:
875 	iounmap(is->pmu_regs);
876 	return ret;
877 }
878 
fimc_is_runtime_resume(struct device * dev)879 static int fimc_is_runtime_resume(struct device *dev)
880 {
881 	struct fimc_is *is = dev_get_drvdata(dev);
882 	int ret;
883 
884 	ret = fimc_is_setup_clocks(is);
885 	if (ret)
886 		return ret;
887 
888 	return fimc_is_enable_clocks(is);
889 }
890 
fimc_is_runtime_suspend(struct device * dev)891 static int fimc_is_runtime_suspend(struct device *dev)
892 {
893 	struct fimc_is *is = dev_get_drvdata(dev);
894 
895 	fimc_is_disable_clocks(is);
896 	return 0;
897 }
898 
899 #ifdef CONFIG_PM_SLEEP
fimc_is_resume(struct device * dev)900 static int fimc_is_resume(struct device *dev)
901 {
902 	/* TODO: */
903 	return 0;
904 }
905 
fimc_is_suspend(struct device * dev)906 static int fimc_is_suspend(struct device *dev)
907 {
908 	struct fimc_is *is = dev_get_drvdata(dev);
909 
910 	/* TODO: */
911 	if (test_bit(IS_ST_A5_PWR_ON, &is->state))
912 		return -EBUSY;
913 
914 	return 0;
915 }
916 #endif /* CONFIG_PM_SLEEP */
917 
fimc_is_remove(struct platform_device * pdev)918 static int fimc_is_remove(struct platform_device *pdev)
919 {
920 	struct device *dev = &pdev->dev;
921 	struct fimc_is *is = dev_get_drvdata(dev);
922 
923 	pm_runtime_disable(dev);
924 	pm_runtime_set_suspended(dev);
925 	if (!pm_runtime_status_suspended(dev))
926 		fimc_is_runtime_suspend(dev);
927 	free_irq(is->irq, is);
928 	fimc_is_unregister_subdevs(is);
929 	vb2_dma_contig_clear_max_seg_size(dev);
930 	fimc_is_put_clocks(is);
931 	iounmap(is->pmu_regs);
932 	fimc_is_debugfs_remove(is);
933 	release_firmware(is->fw.f_w);
934 	fimc_is_free_cpu_memory(is);
935 
936 	return 0;
937 }
938 
939 static const struct of_device_id fimc_is_of_match[] = {
940 	{ .compatible = "samsung,exynos4212-fimc-is" },
941 	{ /* sentinel */ },
942 };
943 MODULE_DEVICE_TABLE(of, fimc_is_of_match);
944 
945 static const struct dev_pm_ops fimc_is_pm_ops = {
946 	SET_SYSTEM_SLEEP_PM_OPS(fimc_is_suspend, fimc_is_resume)
947 	SET_RUNTIME_PM_OPS(fimc_is_runtime_suspend, fimc_is_runtime_resume,
948 			   NULL)
949 };
950 
951 static struct platform_driver fimc_is_driver = {
952 	.probe		= fimc_is_probe,
953 	.remove		= fimc_is_remove,
954 	.driver = {
955 		.of_match_table	= fimc_is_of_match,
956 		.name		= FIMC_IS_DRV_NAME,
957 		.pm		= &fimc_is_pm_ops,
958 	}
959 };
960 
fimc_is_module_init(void)961 static int fimc_is_module_init(void)
962 {
963 	int ret;
964 
965 	ret = fimc_is_register_i2c_driver();
966 	if (ret < 0)
967 		return ret;
968 
969 	ret = platform_driver_register(&fimc_is_driver);
970 
971 	if (ret < 0)
972 		fimc_is_unregister_i2c_driver();
973 
974 	return ret;
975 }
976 
fimc_is_module_exit(void)977 static void fimc_is_module_exit(void)
978 {
979 	fimc_is_unregister_i2c_driver();
980 	platform_driver_unregister(&fimc_is_driver);
981 }
982 
983 module_init(fimc_is_module_init);
984 module_exit(fimc_is_module_exit);
985 
986 MODULE_ALIAS("platform:" FIMC_IS_DRV_NAME);
987 MODULE_AUTHOR("Younghwan Joo <yhwan.joo@samsung.com>");
988 MODULE_AUTHOR("Sylwester Nawrocki <s.nawrocki@samsung.com>");
989 MODULE_LICENSE("GPL v2");
990