6 * Copyright (C) 2006-2010 Nokia Corporation
7 * Copyright (C) 2007-2009 Texas Instruments, Inc.
9 * Contacts: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
10 * Sakari Ailus <sakari.ailus@iki.fi>
13 * Laurent Pinchart <laurent.pinchart@ideasonboard.com>
14 * Sakari Ailus <sakari.ailus@iki.fi>
15 * David Cohen <dacohen@gmail.com>
16 * Stanimir Varbanov <svarbanov@mm-sol.com>
17 * Vimarsh Zutshi <vimarsh.zutshi@gmail.com>
18 * Tuukka Toivonen <tuukkat76@gmail.com>
19 * Sergio Aguirre <saaguirre@ti.com>
20 * Antti Koskipaa <akoskipa@gmail.com>
21 * Ivan T. Ivanov <iivanov@mm-sol.com>
22 * RaniSuneela <r-m@ti.com>
23 * Atanas Filipov <afilipov@mm-sol.com>
24 * Gjorgji Rosikopulos <grosikopulos@mm-sol.com>
25 * Hiroshi DOYU <hiroshi.doyu@nokia.com>
26 * Nayden Kanchev <nkanchev@mm-sol.com>
27 * Phil Carmody <ext-phil.2.carmody@nokia.com>
28 * Artem Bityutskiy <artem.bityutskiy@nokia.com>
29 * Dominic Curran <dcurran@ti.com>
30 * Ilkka Myllyperkio <ilkka.myllyperkio@sofica.fi>
31 * Pallavi Kulkarni <p-kulkarni@ti.com>
32 * Vaibhav Hiremath <hvaibhav@ti.com>
33 * Mohit Jalori <mjalori@ti.com>
34 * Sameer Venkatraman <sameerv@ti.com>
35 * Senthilvadivu Guruswamy <svadivu@ti.com>
36 * Thara Gopinath <thara@ti.com>
37 * Toni Leinonen <toni.leinonen@nokia.com>
38 * Troy Laramy <t-laramy@ti.com>
40 * This program is free software; you can redistribute it and/or modify
41 * it under the terms of the GNU General Public License version 2 as
42 * published by the Free Software Foundation.
44 * This program is distributed in the hope that it will be useful, but
45 * WITHOUT ANY WARRANTY; without even the implied warranty of
46 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
47 * General Public License for more details.
49 * You should have received a copy of the GNU General Public License
50 * along with this program; if not, write to the Free Software
51 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
55 #include <asm/cacheflush.h>
57 #include <linux/clk.h>
58 #include <linux/clkdev.h>
59 #include <linux/delay.h>
60 #include <linux/device.h>
61 #include <linux/dma-mapping.h>
62 #include <linux/i2c.h>
63 #include <linux/interrupt.h>
64 #include <linux/module.h>
65 #include <linux/omap-iommu.h>
66 #include <linux/platform_device.h>
67 #include <linux/regulator/consumer.h>
68 #include <linux/slab.h>
69 #include <linux/sched.h>
70 #include <linux/vmalloc.h>
72 #include <media/v4l2-common.h>
73 #include <media/v4l2-device.h>
78 #include "isppreview.h"
79 #include "ispresizer.h"
85 static unsigned int autoidle;
86 module_param(autoidle, int, 0444);
87 MODULE_PARM_DESC(autoidle, "Enable OMAP3ISP AUTOIDLE support");
89 static void isp_save_ctx(struct isp_device *isp);
91 static void isp_restore_ctx(struct isp_device *isp);
93 static const struct isp_res_mapping isp_res_maps[] = {
95 .isp_rev = ISP_REVISION_2_0,
96 .map = 1 << OMAP3_ISP_IOMEM_MAIN |
97 1 << OMAP3_ISP_IOMEM_CCP2 |
98 1 << OMAP3_ISP_IOMEM_CCDC |
99 1 << OMAP3_ISP_IOMEM_HIST |
100 1 << OMAP3_ISP_IOMEM_H3A |
101 1 << OMAP3_ISP_IOMEM_PREV |
102 1 << OMAP3_ISP_IOMEM_RESZ |
103 1 << OMAP3_ISP_IOMEM_SBL |
104 1 << OMAP3_ISP_IOMEM_CSI2A_REGS1 |
105 1 << OMAP3_ISP_IOMEM_CSIPHY2 |
106 1 << OMAP3_ISP_IOMEM_343X_CONTROL_CSIRXFE,
109 .isp_rev = ISP_REVISION_15_0,
110 .map = 1 << OMAP3_ISP_IOMEM_MAIN |
111 1 << OMAP3_ISP_IOMEM_CCP2 |
112 1 << OMAP3_ISP_IOMEM_CCDC |
113 1 << OMAP3_ISP_IOMEM_HIST |
114 1 << OMAP3_ISP_IOMEM_H3A |
115 1 << OMAP3_ISP_IOMEM_PREV |
116 1 << OMAP3_ISP_IOMEM_RESZ |
117 1 << OMAP3_ISP_IOMEM_SBL |
118 1 << OMAP3_ISP_IOMEM_CSI2A_REGS1 |
119 1 << OMAP3_ISP_IOMEM_CSIPHY2 |
120 1 << OMAP3_ISP_IOMEM_CSI2A_REGS2 |
121 1 << OMAP3_ISP_IOMEM_CSI2C_REGS1 |
122 1 << OMAP3_ISP_IOMEM_CSIPHY1 |
123 1 << OMAP3_ISP_IOMEM_CSI2C_REGS2 |
124 1 << OMAP3_ISP_IOMEM_3630_CONTROL_CAMERA_PHY_CTRL,
128 /* Structure for saving/restoring ISP module registers */
129 static struct isp_reg isp_reg_list[] = {
130 {OMAP3_ISP_IOMEM_MAIN, ISP_SYSCONFIG, 0},
131 {OMAP3_ISP_IOMEM_MAIN, ISP_CTRL, 0},
132 {OMAP3_ISP_IOMEM_MAIN, ISP_TCTRL_CTRL, 0},
137 * omap3isp_flush - Post pending L3 bus writes by doing a register readback
138 * @isp: OMAP3 ISP device
140 * In order to force posting of pending writes, we need to write and
141 * readback the same register, in this case the revision register.
143 * See this link for reference:
144 * http://www.mail-archive.com/linux-omap@vger.kernel.org/msg08149.html
146 void omap3isp_flush(struct isp_device *isp)
148 isp_reg_writel(isp, 0, OMAP3_ISP_IOMEM_MAIN, ISP_REVISION);
149 isp_reg_readl(isp, OMAP3_ISP_IOMEM_MAIN, ISP_REVISION);
152 /* -----------------------------------------------------------------------------
156 #define to_isp_xclk(_hw) container_of(_hw, struct isp_xclk, hw)
158 static void isp_xclk_update(struct isp_xclk *xclk, u32 divider)
162 isp_reg_clr_set(xclk->isp, OMAP3_ISP_IOMEM_MAIN, ISP_TCTRL_CTRL,
163 ISPTCTRL_CTRL_DIVA_MASK,
164 divider << ISPTCTRL_CTRL_DIVA_SHIFT);
167 isp_reg_clr_set(xclk->isp, OMAP3_ISP_IOMEM_MAIN, ISP_TCTRL_CTRL,
168 ISPTCTRL_CTRL_DIVB_MASK,
169 divider << ISPTCTRL_CTRL_DIVB_SHIFT);
174 static int isp_xclk_prepare(struct clk_hw *hw)
176 struct isp_xclk *xclk = to_isp_xclk(hw);
178 omap3isp_get(xclk->isp);
183 static void isp_xclk_unprepare(struct clk_hw *hw)
185 struct isp_xclk *xclk = to_isp_xclk(hw);
187 omap3isp_put(xclk->isp);
190 static int isp_xclk_enable(struct clk_hw *hw)
192 struct isp_xclk *xclk = to_isp_xclk(hw);
195 spin_lock_irqsave(&xclk->lock, flags);
196 isp_xclk_update(xclk, xclk->divider);
197 xclk->enabled = true;
198 spin_unlock_irqrestore(&xclk->lock, flags);
203 static void isp_xclk_disable(struct clk_hw *hw)
205 struct isp_xclk *xclk = to_isp_xclk(hw);
208 spin_lock_irqsave(&xclk->lock, flags);
209 isp_xclk_update(xclk, 0);
210 xclk->enabled = false;
211 spin_unlock_irqrestore(&xclk->lock, flags);
214 static unsigned long isp_xclk_recalc_rate(struct clk_hw *hw,
215 unsigned long parent_rate)
217 struct isp_xclk *xclk = to_isp_xclk(hw);
219 return parent_rate / xclk->divider;
222 static u32 isp_xclk_calc_divider(unsigned long *rate, unsigned long parent_rate)
226 if (*rate >= parent_rate) {
228 return ISPTCTRL_CTRL_DIV_BYPASS;
231 divider = DIV_ROUND_CLOSEST(parent_rate, *rate);
232 if (divider >= ISPTCTRL_CTRL_DIV_BYPASS)
233 divider = ISPTCTRL_CTRL_DIV_BYPASS - 1;
235 *rate = parent_rate / divider;
239 static long isp_xclk_round_rate(struct clk_hw *hw, unsigned long rate,
240 unsigned long *parent_rate)
242 isp_xclk_calc_divider(&rate, *parent_rate);
246 static int isp_xclk_set_rate(struct clk_hw *hw, unsigned long rate,
247 unsigned long parent_rate)
249 struct isp_xclk *xclk = to_isp_xclk(hw);
253 divider = isp_xclk_calc_divider(&rate, parent_rate);
255 spin_lock_irqsave(&xclk->lock, flags);
257 xclk->divider = divider;
259 isp_xclk_update(xclk, divider);
261 spin_unlock_irqrestore(&xclk->lock, flags);
263 dev_dbg(xclk->isp->dev, "%s: cam_xclk%c set to %lu Hz (div %u)\n",
264 __func__, xclk->id == ISP_XCLK_A ? 'a' : 'b', rate, divider);
268 static const struct clk_ops isp_xclk_ops = {
269 .prepare = isp_xclk_prepare,
270 .unprepare = isp_xclk_unprepare,
271 .enable = isp_xclk_enable,
272 .disable = isp_xclk_disable,
273 .recalc_rate = isp_xclk_recalc_rate,
274 .round_rate = isp_xclk_round_rate,
275 .set_rate = isp_xclk_set_rate,
278 static const char *isp_xclk_parent_name = "cam_mclk";
280 static const struct clk_init_data isp_xclk_init_data = {
282 .ops = &isp_xclk_ops,
283 .parent_names = &isp_xclk_parent_name,
287 static int isp_xclk_init(struct isp_device *isp)
289 struct isp_platform_data *pdata = isp->pdata;
290 struct clk_init_data init;
293 for (i = 0; i < ARRAY_SIZE(isp->xclks); ++i)
294 isp->xclks[i].clk = ERR_PTR(-EINVAL);
296 for (i = 0; i < ARRAY_SIZE(isp->xclks); ++i) {
297 struct isp_xclk *xclk = &isp->xclks[i];
300 xclk->id = i == 0 ? ISP_XCLK_A : ISP_XCLK_B;
302 spin_lock_init(&xclk->lock);
304 init.name = i == 0 ? "cam_xclka" : "cam_xclkb";
305 init.ops = &isp_xclk_ops;
306 init.parent_names = &isp_xclk_parent_name;
307 init.num_parents = 1;
309 xclk->hw.init = &init;
311 * The first argument is NULL in order to avoid circular
312 * reference, as this driver takes reference on the
313 * sensor subdevice modules and the sensors would take
314 * reference on this module through clk_get().
316 xclk->clk = clk_register(NULL, &xclk->hw);
317 if (IS_ERR(xclk->clk))
318 return PTR_ERR(xclk->clk);
320 if (pdata->xclks[i].con_id == NULL &&
321 pdata->xclks[i].dev_id == NULL)
324 xclk->lookup = kzalloc(sizeof(*xclk->lookup), GFP_KERNEL);
325 if (xclk->lookup == NULL)
328 xclk->lookup->con_id = pdata->xclks[i].con_id;
329 xclk->lookup->dev_id = pdata->xclks[i].dev_id;
330 xclk->lookup->clk = xclk->clk;
332 clkdev_add(xclk->lookup);
338 static void isp_xclk_cleanup(struct isp_device *isp)
342 for (i = 0; i < ARRAY_SIZE(isp->xclks); ++i) {
343 struct isp_xclk *xclk = &isp->xclks[i];
345 if (!IS_ERR(xclk->clk))
346 clk_unregister(xclk->clk);
349 clkdev_drop(xclk->lookup);
353 /* -----------------------------------------------------------------------------
358 * isp_enable_interrupts - Enable ISP interrupts.
359 * @isp: OMAP3 ISP device
361 static void isp_enable_interrupts(struct isp_device *isp)
363 static const u32 irq = IRQ0ENABLE_CSIA_IRQ
364 | IRQ0ENABLE_CSIB_IRQ
365 | IRQ0ENABLE_CCDC_LSC_PREF_ERR_IRQ
366 | IRQ0ENABLE_CCDC_LSC_DONE_IRQ
367 | IRQ0ENABLE_CCDC_VD0_IRQ
368 | IRQ0ENABLE_CCDC_VD1_IRQ
369 | IRQ0ENABLE_HS_VS_IRQ
370 | IRQ0ENABLE_HIST_DONE_IRQ
371 | IRQ0ENABLE_H3A_AWB_DONE_IRQ
372 | IRQ0ENABLE_H3A_AF_DONE_IRQ
373 | IRQ0ENABLE_PRV_DONE_IRQ
374 | IRQ0ENABLE_RSZ_DONE_IRQ;
376 isp_reg_writel(isp, irq, OMAP3_ISP_IOMEM_MAIN, ISP_IRQ0STATUS);
377 isp_reg_writel(isp, irq, OMAP3_ISP_IOMEM_MAIN, ISP_IRQ0ENABLE);
381 * isp_disable_interrupts - Disable ISP interrupts.
382 * @isp: OMAP3 ISP device
384 static void isp_disable_interrupts(struct isp_device *isp)
386 isp_reg_writel(isp, 0, OMAP3_ISP_IOMEM_MAIN, ISP_IRQ0ENABLE);
390 * isp_core_init - ISP core settings
391 * @isp: OMAP3 ISP device
392 * @idle: Consider idle state.
394 * Set the power settings for the ISP and SBL bus and cConfigure the HS/VS
397 * We need to configure the HS/VS interrupt source before interrupts get
398 * enabled, as the sensor might be free-running and the ISP default setting
399 * (HS edge) would put an unnecessary burden on the CPU.
401 static void isp_core_init(struct isp_device *isp, int idle)
404 ((idle ? ISP_SYSCONFIG_MIDLEMODE_SMARTSTANDBY :
405 ISP_SYSCONFIG_MIDLEMODE_FORCESTANDBY) <<
406 ISP_SYSCONFIG_MIDLEMODE_SHIFT) |
407 ((isp->revision == ISP_REVISION_15_0) ?
408 ISP_SYSCONFIG_AUTOIDLE : 0),
409 OMAP3_ISP_IOMEM_MAIN, ISP_SYSCONFIG);
412 (isp->autoidle ? ISPCTRL_SBL_AUTOIDLE : 0) |
413 ISPCTRL_SYNC_DETECT_VSRISE,
414 OMAP3_ISP_IOMEM_MAIN, ISP_CTRL);
418 * Configure the bridge and lane shifter. Valid inputs are
420 * CCDC_INPUT_PARALLEL: Parallel interface
421 * CCDC_INPUT_CSI2A: CSI2a receiver
422 * CCDC_INPUT_CCP2B: CCP2b receiver
423 * CCDC_INPUT_CSI2C: CSI2c receiver
425 * The bridge and lane shifter are configured according to the selected input
426 * and the ISP platform data.
428 void omap3isp_configure_bridge(struct isp_device *isp,
429 enum ccdc_input_entity input,
430 const struct isp_parallel_platform_data *pdata,
431 unsigned int shift, unsigned int bridge)
435 ispctrl_val = isp_reg_readl(isp, OMAP3_ISP_IOMEM_MAIN, ISP_CTRL);
436 ispctrl_val &= ~ISPCTRL_SHIFT_MASK;
437 ispctrl_val &= ~ISPCTRL_PAR_CLK_POL_INV;
438 ispctrl_val &= ~ISPCTRL_PAR_SER_CLK_SEL_MASK;
439 ispctrl_val &= ~ISPCTRL_PAR_BRIDGE_MASK;
440 ispctrl_val |= bridge;
443 case CCDC_INPUT_PARALLEL:
444 ispctrl_val |= ISPCTRL_PAR_SER_CLK_SEL_PARALLEL;
445 ispctrl_val |= pdata->clk_pol << ISPCTRL_PAR_CLK_POL_SHIFT;
446 shift += pdata->data_lane_shift * 2;
449 case CCDC_INPUT_CSI2A:
450 ispctrl_val |= ISPCTRL_PAR_SER_CLK_SEL_CSIA;
453 case CCDC_INPUT_CCP2B:
454 ispctrl_val |= ISPCTRL_PAR_SER_CLK_SEL_CSIB;
457 case CCDC_INPUT_CSI2C:
458 ispctrl_val |= ISPCTRL_PAR_SER_CLK_SEL_CSIC;
465 ispctrl_val |= ((shift/2) << ISPCTRL_SHIFT_SHIFT) & ISPCTRL_SHIFT_MASK;
467 isp_reg_writel(isp, ispctrl_val, OMAP3_ISP_IOMEM_MAIN, ISP_CTRL);
470 void omap3isp_hist_dma_done(struct isp_device *isp)
472 if (omap3isp_ccdc_busy(&isp->isp_ccdc) ||
473 omap3isp_stat_pcr_busy(&isp->isp_hist)) {
474 /* Histogram cannot be enabled in this frame anymore */
475 atomic_set(&isp->isp_hist.buf_err, 1);
476 dev_dbg(isp->dev, "hist: Out of synchronization with "
477 "CCDC. Ignoring next buffer.\n");
481 static inline void isp_isr_dbg(struct isp_device *isp, u32 irqstatus)
483 static const char *name[] = {
502 "CCDC_LSC_PREFETCH_COMPLETED",
503 "CCDC_LSC_PREFETCH_ERROR",
519 dev_dbg(isp->dev, "ISP IRQ: ");
521 for (i = 0; i < ARRAY_SIZE(name); i++) {
522 if ((1 << i) & irqstatus)
523 printk(KERN_CONT "%s ", name[i]);
525 printk(KERN_CONT "\n");
528 static void isp_isr_sbl(struct isp_device *isp)
530 struct device *dev = isp->dev;
531 struct isp_pipeline *pipe;
535 * Handle shared buffer logic overflows for video buffers.
536 * ISPSBL_PCR_CCDCPRV_2_RSZ_OVF can be safely ignored.
538 sbl_pcr = isp_reg_readl(isp, OMAP3_ISP_IOMEM_SBL, ISPSBL_PCR);
539 isp_reg_writel(isp, sbl_pcr, OMAP3_ISP_IOMEM_SBL, ISPSBL_PCR);
540 sbl_pcr &= ~ISPSBL_PCR_CCDCPRV_2_RSZ_OVF;
543 dev_dbg(dev, "SBL overflow (PCR = 0x%08x)\n", sbl_pcr);
545 if (sbl_pcr & ISPSBL_PCR_CSIB_WBL_OVF) {
546 pipe = to_isp_pipeline(&isp->isp_ccp2.subdev.entity);
551 if (sbl_pcr & ISPSBL_PCR_CSIA_WBL_OVF) {
552 pipe = to_isp_pipeline(&isp->isp_csi2a.subdev.entity);
557 if (sbl_pcr & ISPSBL_PCR_CCDC_WBL_OVF) {
558 pipe = to_isp_pipeline(&isp->isp_ccdc.subdev.entity);
563 if (sbl_pcr & ISPSBL_PCR_PRV_WBL_OVF) {
564 pipe = to_isp_pipeline(&isp->isp_prev.subdev.entity);
569 if (sbl_pcr & (ISPSBL_PCR_RSZ1_WBL_OVF
570 | ISPSBL_PCR_RSZ2_WBL_OVF
571 | ISPSBL_PCR_RSZ3_WBL_OVF
572 | ISPSBL_PCR_RSZ4_WBL_OVF)) {
573 pipe = to_isp_pipeline(&isp->isp_res.subdev.entity);
578 if (sbl_pcr & ISPSBL_PCR_H3A_AF_WBL_OVF)
579 omap3isp_stat_sbl_overflow(&isp->isp_af);
581 if (sbl_pcr & ISPSBL_PCR_H3A_AEAWB_WBL_OVF)
582 omap3isp_stat_sbl_overflow(&isp->isp_aewb);
586 * isp_isr - Interrupt Service Routine for Camera ISP module.
587 * @irq: Not used currently.
588 * @_isp: Pointer to the OMAP3 ISP device
590 * Handles the corresponding callback if plugged in.
592 * Returns IRQ_HANDLED when IRQ was correctly handled, or IRQ_NONE when the
593 * IRQ wasn't handled.
595 static irqreturn_t isp_isr(int irq, void *_isp)
597 static const u32 ccdc_events = IRQ0STATUS_CCDC_LSC_PREF_ERR_IRQ |
598 IRQ0STATUS_CCDC_LSC_DONE_IRQ |
599 IRQ0STATUS_CCDC_VD0_IRQ |
600 IRQ0STATUS_CCDC_VD1_IRQ |
601 IRQ0STATUS_HS_VS_IRQ;
602 struct isp_device *isp = _isp;
605 irqstatus = isp_reg_readl(isp, OMAP3_ISP_IOMEM_MAIN, ISP_IRQ0STATUS);
606 isp_reg_writel(isp, irqstatus, OMAP3_ISP_IOMEM_MAIN, ISP_IRQ0STATUS);
610 if (irqstatus & IRQ0STATUS_CSIA_IRQ)
611 omap3isp_csi2_isr(&isp->isp_csi2a);
613 if (irqstatus & IRQ0STATUS_CSIB_IRQ)
614 omap3isp_ccp2_isr(&isp->isp_ccp2);
616 if (irqstatus & IRQ0STATUS_CCDC_VD0_IRQ) {
617 if (isp->isp_ccdc.output & CCDC_OUTPUT_PREVIEW)
618 omap3isp_preview_isr_frame_sync(&isp->isp_prev);
619 if (isp->isp_ccdc.output & CCDC_OUTPUT_RESIZER)
620 omap3isp_resizer_isr_frame_sync(&isp->isp_res);
621 omap3isp_stat_isr_frame_sync(&isp->isp_aewb);
622 omap3isp_stat_isr_frame_sync(&isp->isp_af);
623 omap3isp_stat_isr_frame_sync(&isp->isp_hist);
626 if (irqstatus & ccdc_events)
627 omap3isp_ccdc_isr(&isp->isp_ccdc, irqstatus & ccdc_events);
629 if (irqstatus & IRQ0STATUS_PRV_DONE_IRQ) {
630 if (isp->isp_prev.output & PREVIEW_OUTPUT_RESIZER)
631 omap3isp_resizer_isr_frame_sync(&isp->isp_res);
632 omap3isp_preview_isr(&isp->isp_prev);
635 if (irqstatus & IRQ0STATUS_RSZ_DONE_IRQ)
636 omap3isp_resizer_isr(&isp->isp_res);
638 if (irqstatus & IRQ0STATUS_H3A_AWB_DONE_IRQ)
639 omap3isp_stat_isr(&isp->isp_aewb);
641 if (irqstatus & IRQ0STATUS_H3A_AF_DONE_IRQ)
642 omap3isp_stat_isr(&isp->isp_af);
644 if (irqstatus & IRQ0STATUS_HIST_DONE_IRQ)
645 omap3isp_stat_isr(&isp->isp_hist);
649 #if defined(DEBUG) && defined(ISP_ISR_DEBUG)
650 isp_isr_dbg(isp, irqstatus);
656 /* -----------------------------------------------------------------------------
657 * Pipeline power management
659 * Entities must be powered up when part of a pipeline that contains at least
660 * one open video device node.
662 * To achieve this use the entity use_count field to track the number of users.
663 * For entities corresponding to video device nodes the use_count field stores
664 * the users count of the node. For entities corresponding to subdevs the
665 * use_count field stores the total number of users of all video device nodes
668 * The omap3isp_pipeline_pm_use() function must be called in the open() and
669 * close() handlers of video device nodes. It increments or decrements the use
670 * count of all subdev entities in the pipeline.
672 * To react to link management on powered pipelines, the link setup notification
673 * callback updates the use count of all entities in the source and sink sides
678 * isp_pipeline_pm_use_count - Count the number of users of a pipeline
679 * @entity: The entity
681 * Return the total number of users of all video device nodes in the pipeline.
683 static int isp_pipeline_pm_use_count(struct media_entity *entity)
685 struct media_entity_graph graph;
688 media_entity_graph_walk_start(&graph, entity);
690 while ((entity = media_entity_graph_walk_next(&graph))) {
691 if (media_entity_type(entity) == MEDIA_ENT_T_DEVNODE)
692 use += entity->use_count;
699 * isp_pipeline_pm_power_one - Apply power change to an entity
700 * @entity: The entity
701 * @change: Use count change
703 * Change the entity use count by @change. If the entity is a subdev update its
704 * power state by calling the core::s_power operation when the use count goes
705 * from 0 to != 0 or from != 0 to 0.
707 * Return 0 on success or a negative error code on failure.
709 static int isp_pipeline_pm_power_one(struct media_entity *entity, int change)
711 struct v4l2_subdev *subdev;
714 subdev = media_entity_type(entity) == MEDIA_ENT_T_V4L2_SUBDEV
715 ? media_entity_to_v4l2_subdev(entity) : NULL;
717 if (entity->use_count == 0 && change > 0 && subdev != NULL) {
718 ret = v4l2_subdev_call(subdev, core, s_power, 1);
719 if (ret < 0 && ret != -ENOIOCTLCMD)
723 entity->use_count += change;
724 WARN_ON(entity->use_count < 0);
726 if (entity->use_count == 0 && change < 0 && subdev != NULL)
727 v4l2_subdev_call(subdev, core, s_power, 0);
733 * isp_pipeline_pm_power - Apply power change to all entities in a pipeline
734 * @entity: The entity
735 * @change: Use count change
737 * Walk the pipeline to update the use count and the power state of all non-node
740 * Return 0 on success or a negative error code on failure.
742 static int isp_pipeline_pm_power(struct media_entity *entity, int change)
744 struct media_entity_graph graph;
745 struct media_entity *first = entity;
751 media_entity_graph_walk_start(&graph, entity);
753 while (!ret && (entity = media_entity_graph_walk_next(&graph)))
754 if (media_entity_type(entity) != MEDIA_ENT_T_DEVNODE)
755 ret = isp_pipeline_pm_power_one(entity, change);
760 media_entity_graph_walk_start(&graph, first);
762 while ((first = media_entity_graph_walk_next(&graph))
764 if (media_entity_type(first) != MEDIA_ENT_T_DEVNODE)
765 isp_pipeline_pm_power_one(first, -change);
771 * omap3isp_pipeline_pm_use - Update the use count of an entity
772 * @entity: The entity
773 * @use: Use (1) or stop using (0) the entity
775 * Update the use count of all entities in the pipeline and power entities on or
778 * Return 0 on success or a negative error code on failure. Powering entities
779 * off is assumed to never fail. No failure can occur when the use parameter is
782 int omap3isp_pipeline_pm_use(struct media_entity *entity, int use)
784 int change = use ? 1 : -1;
787 mutex_lock(&entity->parent->graph_mutex);
789 /* Apply use count to node. */
790 entity->use_count += change;
791 WARN_ON(entity->use_count < 0);
793 /* Apply power change to connected non-nodes. */
794 ret = isp_pipeline_pm_power(entity, change);
796 entity->use_count -= change;
798 mutex_unlock(&entity->parent->graph_mutex);
804 * isp_pipeline_link_notify - Link management notification callback
806 * @flags: New link flags that will be applied
807 * @notification: The link's state change notification type (MEDIA_DEV_NOTIFY_*)
809 * React to link management on powered pipelines by updating the use count of
810 * all entities in the source and sink sides of the link. Entities are powered
811 * on or off accordingly.
813 * Return 0 on success or a negative error code on failure. Powering entities
814 * off is assumed to never fail. This function will not fail for disconnection
817 static int isp_pipeline_link_notify(struct media_link *link, u32 flags,
818 unsigned int notification)
820 struct media_entity *source = link->source->entity;
821 struct media_entity *sink = link->sink->entity;
822 int source_use = isp_pipeline_pm_use_count(source);
823 int sink_use = isp_pipeline_pm_use_count(sink);
826 if (notification == MEDIA_DEV_NOTIFY_POST_LINK_CH &&
827 !(link->flags & MEDIA_LNK_FL_ENABLED)) {
828 /* Powering off entities is assumed to never fail. */
829 isp_pipeline_pm_power(source, -sink_use);
830 isp_pipeline_pm_power(sink, -source_use);
834 if (notification == MEDIA_DEV_NOTIFY_POST_LINK_CH &&
835 (flags & MEDIA_LNK_FL_ENABLED)) {
837 ret = isp_pipeline_pm_power(source, sink_use);
841 ret = isp_pipeline_pm_power(sink, source_use);
843 isp_pipeline_pm_power(source, -sink_use);
851 /* -----------------------------------------------------------------------------
852 * Pipeline stream management
856 * isp_pipeline_enable - Enable streaming on a pipeline
857 * @pipe: ISP pipeline
858 * @mode: Stream mode (single shot or continuous)
860 * Walk the entities chain starting at the pipeline output video node and start
861 * all modules in the chain in the given mode.
863 * Return 0 if successful, or the return value of the failed video::s_stream
864 * operation otherwise.
866 static int isp_pipeline_enable(struct isp_pipeline *pipe,
867 enum isp_pipeline_stream_state mode)
869 struct isp_device *isp = pipe->output->isp;
870 struct media_entity *entity;
871 struct media_pad *pad;
872 struct v4l2_subdev *subdev;
876 /* Refuse to start streaming if an entity included in the pipeline has
877 * crashed. This check must be performed before the loop below to avoid
878 * starting entities if the pipeline won't start anyway (those entities
879 * would then likely fail to stop, making the problem worse).
881 if (pipe->entities & isp->crashed)
884 spin_lock_irqsave(&pipe->lock, flags);
885 pipe->state &= ~(ISP_PIPELINE_IDLE_INPUT | ISP_PIPELINE_IDLE_OUTPUT);
886 spin_unlock_irqrestore(&pipe->lock, flags);
888 pipe->do_propagation = false;
890 entity = &pipe->output->video.entity;
892 pad = &entity->pads[0];
893 if (!(pad->flags & MEDIA_PAD_FL_SINK))
896 pad = media_entity_remote_pad(pad);
898 media_entity_type(pad->entity) != MEDIA_ENT_T_V4L2_SUBDEV)
901 entity = pad->entity;
902 subdev = media_entity_to_v4l2_subdev(entity);
904 ret = v4l2_subdev_call(subdev, video, s_stream, mode);
905 if (ret < 0 && ret != -ENOIOCTLCMD)
908 if (subdev == &isp->isp_ccdc.subdev) {
909 v4l2_subdev_call(&isp->isp_aewb.subdev, video,
911 v4l2_subdev_call(&isp->isp_af.subdev, video,
913 v4l2_subdev_call(&isp->isp_hist.subdev, video,
915 pipe->do_propagation = true;
922 static int isp_pipeline_wait_resizer(struct isp_device *isp)
924 return omap3isp_resizer_busy(&isp->isp_res);
927 static int isp_pipeline_wait_preview(struct isp_device *isp)
929 return omap3isp_preview_busy(&isp->isp_prev);
932 static int isp_pipeline_wait_ccdc(struct isp_device *isp)
934 return omap3isp_stat_busy(&isp->isp_af)
935 || omap3isp_stat_busy(&isp->isp_aewb)
936 || omap3isp_stat_busy(&isp->isp_hist)
937 || omap3isp_ccdc_busy(&isp->isp_ccdc);
940 #define ISP_STOP_TIMEOUT msecs_to_jiffies(1000)
942 static int isp_pipeline_wait(struct isp_device *isp,
943 int(*busy)(struct isp_device *isp))
945 unsigned long timeout = jiffies + ISP_STOP_TIMEOUT;
947 while (!time_after(jiffies, timeout)) {
956 * isp_pipeline_disable - Disable streaming on a pipeline
957 * @pipe: ISP pipeline
959 * Walk the entities chain starting at the pipeline output video node and stop
960 * all modules in the chain. Wait synchronously for the modules to be stopped if
963 * Return 0 if all modules have been properly stopped, or -ETIMEDOUT if a module
964 * can't be stopped (in which case a software reset of the ISP is probably
967 static int isp_pipeline_disable(struct isp_pipeline *pipe)
969 struct isp_device *isp = pipe->output->isp;
970 struct media_entity *entity;
971 struct media_pad *pad;
972 struct v4l2_subdev *subdev;
977 * We need to stop all the modules after CCDC first or they'll
978 * never stop since they may not get a full frame from CCDC.
980 entity = &pipe->output->video.entity;
982 pad = &entity->pads[0];
983 if (!(pad->flags & MEDIA_PAD_FL_SINK))
986 pad = media_entity_remote_pad(pad);
988 media_entity_type(pad->entity) != MEDIA_ENT_T_V4L2_SUBDEV)
991 entity = pad->entity;
992 subdev = media_entity_to_v4l2_subdev(entity);
994 if (subdev == &isp->isp_ccdc.subdev) {
995 v4l2_subdev_call(&isp->isp_aewb.subdev,
997 v4l2_subdev_call(&isp->isp_af.subdev,
999 v4l2_subdev_call(&isp->isp_hist.subdev,
1000 video, s_stream, 0);
1003 v4l2_subdev_call(subdev, video, s_stream, 0);
1005 if (subdev == &isp->isp_res.subdev)
1006 ret = isp_pipeline_wait(isp, isp_pipeline_wait_resizer);
1007 else if (subdev == &isp->isp_prev.subdev)
1008 ret = isp_pipeline_wait(isp, isp_pipeline_wait_preview);
1009 else if (subdev == &isp->isp_ccdc.subdev)
1010 ret = isp_pipeline_wait(isp, isp_pipeline_wait_ccdc);
1014 /* Handle stop failures. An entity that fails to stop can
1015 * usually just be restarted. Flag the stop failure nonetheless
1016 * to trigger an ISP reset the next time the device is released,
1019 * The preview engine is a special case. A failure to stop can
1020 * mean a hardware crash. When that happens the preview engine
1021 * won't respond to read/write operations on the L4 bus anymore,
1022 * resulting in a bus fault and a kernel oops next time it gets
1023 * accessed. Mark it as crashed to prevent pipelines including
1024 * it from being started.
1027 dev_info(isp->dev, "Unable to stop %s\n", subdev->name);
1028 isp->stop_failure = true;
1029 if (subdev == &isp->isp_prev.subdev)
1030 isp->crashed |= 1U << subdev->entity.id;
1031 failure = -ETIMEDOUT;
1039 * omap3isp_pipeline_set_stream - Enable/disable streaming on a pipeline
1040 * @pipe: ISP pipeline
1041 * @state: Stream state (stopped, single shot or continuous)
1043 * Set the pipeline to the given stream state. Pipelines can be started in
1044 * single-shot or continuous mode.
1046 * Return 0 if successful, or the return value of the failed video::s_stream
1047 * operation otherwise. The pipeline state is not updated when the operation
1048 * fails, except when stopping the pipeline.
1050 int omap3isp_pipeline_set_stream(struct isp_pipeline *pipe,
1051 enum isp_pipeline_stream_state state)
1055 if (state == ISP_PIPELINE_STREAM_STOPPED)
1056 ret = isp_pipeline_disable(pipe);
1058 ret = isp_pipeline_enable(pipe, state);
1060 if (ret == 0 || state == ISP_PIPELINE_STREAM_STOPPED)
1061 pipe->stream_state = state;
1067 * omap3isp_pipeline_cancel_stream - Cancel stream on a pipeline
1068 * @pipe: ISP pipeline
1070 * Cancelling a stream mark all buffers on all video nodes in the pipeline as
1071 * erroneous and makes sure no new buffer can be queued. This function is called
1072 * when a fatal error that prevents any further operation on the pipeline
1075 void omap3isp_pipeline_cancel_stream(struct isp_pipeline *pipe)
1078 omap3isp_video_cancel_stream(pipe->input);
1080 omap3isp_video_cancel_stream(pipe->output);
1084 * isp_pipeline_resume - Resume streaming on a pipeline
1085 * @pipe: ISP pipeline
1087 * Resume video output and input and re-enable pipeline.
1089 static void isp_pipeline_resume(struct isp_pipeline *pipe)
1091 int singleshot = pipe->stream_state == ISP_PIPELINE_STREAM_SINGLESHOT;
1093 omap3isp_video_resume(pipe->output, !singleshot);
1095 omap3isp_video_resume(pipe->input, 0);
1096 isp_pipeline_enable(pipe, pipe->stream_state);
1100 * isp_pipeline_suspend - Suspend streaming on a pipeline
1101 * @pipe: ISP pipeline
1105 static void isp_pipeline_suspend(struct isp_pipeline *pipe)
1107 isp_pipeline_disable(pipe);
1111 * isp_pipeline_is_last - Verify if entity has an enabled link to the output
1113 * @me: ISP module's media entity
1115 * Returns 1 if the entity has an enabled link to the output video node or 0
1116 * otherwise. It's true only while pipeline can have no more than one output
1119 static int isp_pipeline_is_last(struct media_entity *me)
1121 struct isp_pipeline *pipe;
1122 struct media_pad *pad;
1126 pipe = to_isp_pipeline(me);
1127 if (pipe->stream_state == ISP_PIPELINE_STREAM_STOPPED)
1129 pad = media_entity_remote_pad(&pipe->output->pad);
1130 return pad->entity == me;
1134 * isp_suspend_module_pipeline - Suspend pipeline to which belongs the module
1135 * @me: ISP module's media entity
1137 * Suspend the whole pipeline if module's entity has an enabled link to the
1138 * output video node. It works only while pipeline can have no more than one
1141 static void isp_suspend_module_pipeline(struct media_entity *me)
1143 if (isp_pipeline_is_last(me))
1144 isp_pipeline_suspend(to_isp_pipeline(me));
1148 * isp_resume_module_pipeline - Resume pipeline to which belongs the module
1149 * @me: ISP module's media entity
1151 * Resume the whole pipeline if module's entity has an enabled link to the
1152 * output video node. It works only while pipeline can have no more than one
1155 static void isp_resume_module_pipeline(struct media_entity *me)
1157 if (isp_pipeline_is_last(me))
1158 isp_pipeline_resume(to_isp_pipeline(me));
1162 * isp_suspend_modules - Suspend ISP submodules.
1163 * @isp: OMAP3 ISP device
1165 * Returns 0 if suspend left in idle state all the submodules properly,
1166 * or returns 1 if a general Reset is required to suspend the submodules.
1168 static int isp_suspend_modules(struct isp_device *isp)
1170 unsigned long timeout;
1172 omap3isp_stat_suspend(&isp->isp_aewb);
1173 omap3isp_stat_suspend(&isp->isp_af);
1174 omap3isp_stat_suspend(&isp->isp_hist);
1175 isp_suspend_module_pipeline(&isp->isp_res.subdev.entity);
1176 isp_suspend_module_pipeline(&isp->isp_prev.subdev.entity);
1177 isp_suspend_module_pipeline(&isp->isp_ccdc.subdev.entity);
1178 isp_suspend_module_pipeline(&isp->isp_csi2a.subdev.entity);
1179 isp_suspend_module_pipeline(&isp->isp_ccp2.subdev.entity);
1181 timeout = jiffies + ISP_STOP_TIMEOUT;
1182 while (omap3isp_stat_busy(&isp->isp_af)
1183 || omap3isp_stat_busy(&isp->isp_aewb)
1184 || omap3isp_stat_busy(&isp->isp_hist)
1185 || omap3isp_preview_busy(&isp->isp_prev)
1186 || omap3isp_resizer_busy(&isp->isp_res)
1187 || omap3isp_ccdc_busy(&isp->isp_ccdc)) {
1188 if (time_after(jiffies, timeout)) {
1189 dev_info(isp->dev, "can't stop modules.\n");
1199 * isp_resume_modules - Resume ISP submodules.
1200 * @isp: OMAP3 ISP device
1202 static void isp_resume_modules(struct isp_device *isp)
1204 omap3isp_stat_resume(&isp->isp_aewb);
1205 omap3isp_stat_resume(&isp->isp_af);
1206 omap3isp_stat_resume(&isp->isp_hist);
1207 isp_resume_module_pipeline(&isp->isp_res.subdev.entity);
1208 isp_resume_module_pipeline(&isp->isp_prev.subdev.entity);
1209 isp_resume_module_pipeline(&isp->isp_ccdc.subdev.entity);
1210 isp_resume_module_pipeline(&isp->isp_csi2a.subdev.entity);
1211 isp_resume_module_pipeline(&isp->isp_ccp2.subdev.entity);
1215 * isp_reset - Reset ISP with a timeout wait for idle.
1216 * @isp: OMAP3 ISP device
1218 static int isp_reset(struct isp_device *isp)
1220 unsigned long timeout = 0;
1223 isp_reg_readl(isp, OMAP3_ISP_IOMEM_MAIN, ISP_SYSCONFIG)
1224 | ISP_SYSCONFIG_SOFTRESET,
1225 OMAP3_ISP_IOMEM_MAIN, ISP_SYSCONFIG);
1226 while (!(isp_reg_readl(isp, OMAP3_ISP_IOMEM_MAIN,
1227 ISP_SYSSTATUS) & 0x1)) {
1228 if (timeout++ > 10000) {
1229 dev_alert(isp->dev, "cannot reset ISP\n");
1235 isp->stop_failure = false;
1241 * isp_save_context - Saves the values of the ISP module registers.
1242 * @isp: OMAP3 ISP device
1243 * @reg_list: Structure containing pairs of register address and value to
1247 isp_save_context(struct isp_device *isp, struct isp_reg *reg_list)
1249 struct isp_reg *next = reg_list;
1251 for (; next->reg != ISP_TOK_TERM; next++)
1252 next->val = isp_reg_readl(isp, next->mmio_range, next->reg);
1256 * isp_restore_context - Restores the values of the ISP module registers.
1257 * @isp: OMAP3 ISP device
1258 * @reg_list: Structure containing pairs of register address and value to
1262 isp_restore_context(struct isp_device *isp, struct isp_reg *reg_list)
1264 struct isp_reg *next = reg_list;
1266 for (; next->reg != ISP_TOK_TERM; next++)
1267 isp_reg_writel(isp, next->val, next->mmio_range, next->reg);
1271 * isp_save_ctx - Saves ISP, CCDC, HIST, H3A, PREV, RESZ & MMU context.
1272 * @isp: OMAP3 ISP device
1274 * Routine for saving the context of each module in the ISP.
1275 * CCDC, HIST, H3A, PREV, RESZ and MMU.
1277 static void isp_save_ctx(struct isp_device *isp)
1279 isp_save_context(isp, isp_reg_list);
1280 omap_iommu_save_ctx(isp->dev);
1284 * isp_restore_ctx - Restores ISP, CCDC, HIST, H3A, PREV, RESZ & MMU context.
1285 * @isp: OMAP3 ISP device
1287 * Routine for restoring the context of each module in the ISP.
1288 * CCDC, HIST, H3A, PREV, RESZ and MMU.
1290 static void isp_restore_ctx(struct isp_device *isp)
1292 isp_restore_context(isp, isp_reg_list);
1293 omap_iommu_restore_ctx(isp->dev);
1294 omap3isp_ccdc_restore_context(isp);
1295 omap3isp_preview_restore_context(isp);
1298 /* -----------------------------------------------------------------------------
1299 * SBL resources management
1301 #define OMAP3_ISP_SBL_READ (OMAP3_ISP_SBL_CSI1_READ | \
1302 OMAP3_ISP_SBL_CCDC_LSC_READ | \
1303 OMAP3_ISP_SBL_PREVIEW_READ | \
1304 OMAP3_ISP_SBL_RESIZER_READ)
1305 #define OMAP3_ISP_SBL_WRITE (OMAP3_ISP_SBL_CSI1_WRITE | \
1306 OMAP3_ISP_SBL_CSI2A_WRITE | \
1307 OMAP3_ISP_SBL_CSI2C_WRITE | \
1308 OMAP3_ISP_SBL_CCDC_WRITE | \
1309 OMAP3_ISP_SBL_PREVIEW_WRITE)
1311 void omap3isp_sbl_enable(struct isp_device *isp, enum isp_sbl_resource res)
1315 isp->sbl_resources |= res;
1317 if (isp->sbl_resources & OMAP3_ISP_SBL_CSI1_READ)
1318 sbl |= ISPCTRL_SBL_SHARED_RPORTA;
1320 if (isp->sbl_resources & OMAP3_ISP_SBL_CCDC_LSC_READ)
1321 sbl |= ISPCTRL_SBL_SHARED_RPORTB;
1323 if (isp->sbl_resources & OMAP3_ISP_SBL_CSI2C_WRITE)
1324 sbl |= ISPCTRL_SBL_SHARED_WPORTC;
1326 if (isp->sbl_resources & OMAP3_ISP_SBL_RESIZER_WRITE)
1327 sbl |= ISPCTRL_SBL_WR0_RAM_EN;
1329 if (isp->sbl_resources & OMAP3_ISP_SBL_WRITE)
1330 sbl |= ISPCTRL_SBL_WR1_RAM_EN;
1332 if (isp->sbl_resources & OMAP3_ISP_SBL_READ)
1333 sbl |= ISPCTRL_SBL_RD_RAM_EN;
1335 isp_reg_set(isp, OMAP3_ISP_IOMEM_MAIN, ISP_CTRL, sbl);
1338 void omap3isp_sbl_disable(struct isp_device *isp, enum isp_sbl_resource res)
1342 isp->sbl_resources &= ~res;
1344 if (!(isp->sbl_resources & OMAP3_ISP_SBL_CSI1_READ))
1345 sbl |= ISPCTRL_SBL_SHARED_RPORTA;
1347 if (!(isp->sbl_resources & OMAP3_ISP_SBL_CCDC_LSC_READ))
1348 sbl |= ISPCTRL_SBL_SHARED_RPORTB;
1350 if (!(isp->sbl_resources & OMAP3_ISP_SBL_CSI2C_WRITE))
1351 sbl |= ISPCTRL_SBL_SHARED_WPORTC;
1353 if (!(isp->sbl_resources & OMAP3_ISP_SBL_RESIZER_WRITE))
1354 sbl |= ISPCTRL_SBL_WR0_RAM_EN;
1356 if (!(isp->sbl_resources & OMAP3_ISP_SBL_WRITE))
1357 sbl |= ISPCTRL_SBL_WR1_RAM_EN;
1359 if (!(isp->sbl_resources & OMAP3_ISP_SBL_READ))
1360 sbl |= ISPCTRL_SBL_RD_RAM_EN;
1362 isp_reg_clr(isp, OMAP3_ISP_IOMEM_MAIN, ISP_CTRL, sbl);
1366 * isp_module_sync_idle - Helper to sync module with its idle state
1367 * @me: ISP submodule's media entity
1368 * @wait: ISP submodule's wait queue for streamoff/interrupt synchronization
1369 * @stopping: flag which tells module wants to stop
1371 * This function checks if ISP submodule needs to wait for next interrupt. If
1372 * yes, makes the caller to sleep while waiting for such event.
1374 int omap3isp_module_sync_idle(struct media_entity *me, wait_queue_head_t *wait,
1377 struct isp_pipeline *pipe = to_isp_pipeline(me);
1379 if (pipe->stream_state == ISP_PIPELINE_STREAM_STOPPED ||
1380 (pipe->stream_state == ISP_PIPELINE_STREAM_SINGLESHOT &&
1381 !isp_pipeline_ready(pipe)))
1385 * atomic_set() doesn't include memory barrier on ARM platform for SMP
1386 * scenario. We'll call it here to avoid race conditions.
1388 atomic_set(stopping, 1);
1392 * If module is the last one, it's writing to memory. In this case,
1393 * it's necessary to check if the module is already paused due to
1394 * DMA queue underrun or if it has to wait for next interrupt to be
1396 * If it isn't the last one, the function won't sleep but *stopping
1397 * will still be set to warn next submodule caller's interrupt the
1398 * module wants to be idle.
1400 if (isp_pipeline_is_last(me)) {
1401 struct isp_video *video = pipe->output;
1402 unsigned long flags;
1403 spin_lock_irqsave(&video->queue->irqlock, flags);
1404 if (video->dmaqueue_flags & ISP_VIDEO_DMAQUEUE_UNDERRUN) {
1405 spin_unlock_irqrestore(&video->queue->irqlock, flags);
1406 atomic_set(stopping, 0);
1410 spin_unlock_irqrestore(&video->queue->irqlock, flags);
1411 if (!wait_event_timeout(*wait, !atomic_read(stopping),
1412 msecs_to_jiffies(1000))) {
1413 atomic_set(stopping, 0);
1423 * omap3isp_module_sync_is_stopped - Helper to verify if module was stopping
1424 * @wait: ISP submodule's wait queue for streamoff/interrupt synchronization
1425 * @stopping: flag which tells module wants to stop
1427 * This function checks if ISP submodule was stopping. In case of yes, it
1428 * notices the caller by setting stopping to 0 and waking up the wait queue.
1429 * Returns 1 if it was stopping or 0 otherwise.
1431 int omap3isp_module_sync_is_stopping(wait_queue_head_t *wait,
1434 if (atomic_cmpxchg(stopping, 1, 0)) {
1442 /* --------------------------------------------------------------------------
1446 #define ISPCTRL_CLKS_MASK (ISPCTRL_H3A_CLK_EN | \
1447 ISPCTRL_HIST_CLK_EN | \
1448 ISPCTRL_RSZ_CLK_EN | \
1449 (ISPCTRL_CCDC_CLK_EN | ISPCTRL_CCDC_RAM_EN) | \
1450 (ISPCTRL_PREV_CLK_EN | ISPCTRL_PREV_RAM_EN))
1452 static void __isp_subclk_update(struct isp_device *isp)
1456 /* AEWB and AF share the same clock. */
1457 if (isp->subclk_resources &
1458 (OMAP3_ISP_SUBCLK_AEWB | OMAP3_ISP_SUBCLK_AF))
1459 clk |= ISPCTRL_H3A_CLK_EN;
1461 if (isp->subclk_resources & OMAP3_ISP_SUBCLK_HIST)
1462 clk |= ISPCTRL_HIST_CLK_EN;
1464 if (isp->subclk_resources & OMAP3_ISP_SUBCLK_RESIZER)
1465 clk |= ISPCTRL_RSZ_CLK_EN;
1467 /* NOTE: For CCDC & Preview submodules, we need to affect internal
1470 if (isp->subclk_resources & OMAP3_ISP_SUBCLK_CCDC)
1471 clk |= ISPCTRL_CCDC_CLK_EN | ISPCTRL_CCDC_RAM_EN;
1473 if (isp->subclk_resources & OMAP3_ISP_SUBCLK_PREVIEW)
1474 clk |= ISPCTRL_PREV_CLK_EN | ISPCTRL_PREV_RAM_EN;
1476 isp_reg_clr_set(isp, OMAP3_ISP_IOMEM_MAIN, ISP_CTRL,
1477 ISPCTRL_CLKS_MASK, clk);
1480 void omap3isp_subclk_enable(struct isp_device *isp,
1481 enum isp_subclk_resource res)
1483 isp->subclk_resources |= res;
1485 __isp_subclk_update(isp);
1488 void omap3isp_subclk_disable(struct isp_device *isp,
1489 enum isp_subclk_resource res)
1491 isp->subclk_resources &= ~res;
1493 __isp_subclk_update(isp);
1497 * isp_enable_clocks - Enable ISP clocks
1498 * @isp: OMAP3 ISP device
1500 * Return 0 if successful, or clk_prepare_enable return value if any of them
1503 static int isp_enable_clocks(struct isp_device *isp)
1508 r = clk_prepare_enable(isp->clock[ISP_CLK_CAM_ICK]);
1510 dev_err(isp->dev, "failed to enable cam_ick clock\n");
1511 goto out_clk_enable_ick;
1513 r = clk_set_rate(isp->clock[ISP_CLK_CAM_MCLK], CM_CAM_MCLK_HZ);
1515 dev_err(isp->dev, "clk_set_rate for cam_mclk failed\n");
1516 goto out_clk_enable_mclk;
1518 r = clk_prepare_enable(isp->clock[ISP_CLK_CAM_MCLK]);
1520 dev_err(isp->dev, "failed to enable cam_mclk clock\n");
1521 goto out_clk_enable_mclk;
1523 rate = clk_get_rate(isp->clock[ISP_CLK_CAM_MCLK]);
1524 if (rate != CM_CAM_MCLK_HZ)
1525 dev_warn(isp->dev, "unexpected cam_mclk rate:\n"
1527 " actual : %ld\n", CM_CAM_MCLK_HZ, rate);
1528 r = clk_prepare_enable(isp->clock[ISP_CLK_CSI2_FCK]);
1530 dev_err(isp->dev, "failed to enable csi2_fck clock\n");
1531 goto out_clk_enable_csi2_fclk;
1535 out_clk_enable_csi2_fclk:
1536 clk_disable_unprepare(isp->clock[ISP_CLK_CAM_MCLK]);
1537 out_clk_enable_mclk:
1538 clk_disable_unprepare(isp->clock[ISP_CLK_CAM_ICK]);
1544 * isp_disable_clocks - Disable ISP clocks
1545 * @isp: OMAP3 ISP device
1547 static void isp_disable_clocks(struct isp_device *isp)
1549 clk_disable_unprepare(isp->clock[ISP_CLK_CAM_ICK]);
1550 clk_disable_unprepare(isp->clock[ISP_CLK_CAM_MCLK]);
1551 clk_disable_unprepare(isp->clock[ISP_CLK_CSI2_FCK]);
1554 static const char *isp_clocks[] = {
1561 static int isp_get_clocks(struct isp_device *isp)
1566 for (i = 0; i < ARRAY_SIZE(isp_clocks); ++i) {
1567 clk = devm_clk_get(isp->dev, isp_clocks[i]);
1569 dev_err(isp->dev, "clk_get %s failed\n", isp_clocks[i]);
1570 return PTR_ERR(clk);
1573 isp->clock[i] = clk;
1580 * omap3isp_get - Acquire the ISP resource.
1582 * Initializes the clocks for the first acquire.
1584 * Increment the reference count on the ISP. If the first reference is taken,
1585 * enable clocks and power-up all submodules.
1587 * Return a pointer to the ISP device structure, or NULL if an error occurred.
1589 static struct isp_device *__omap3isp_get(struct isp_device *isp, bool irq)
1591 struct isp_device *__isp = isp;
1596 mutex_lock(&isp->isp_mutex);
1597 if (isp->ref_count > 0)
1600 if (isp_enable_clocks(isp) < 0) {
1605 /* We don't want to restore context before saving it! */
1606 if (isp->has_context)
1607 isp_restore_ctx(isp);
1610 isp_enable_interrupts(isp);
1615 mutex_unlock(&isp->isp_mutex);
1620 struct isp_device *omap3isp_get(struct isp_device *isp)
1622 return __omap3isp_get(isp, true);
1626 * omap3isp_put - Release the ISP
1628 * Decrement the reference count on the ISP. If the last reference is released,
1629 * power-down all submodules, disable clocks and free temporary buffers.
1631 void omap3isp_put(struct isp_device *isp)
1636 mutex_lock(&isp->isp_mutex);
1637 BUG_ON(isp->ref_count == 0);
1638 if (--isp->ref_count == 0) {
1639 isp_disable_interrupts(isp);
1642 isp->has_context = 1;
1644 /* Reset the ISP if an entity has failed to stop. This is the
1645 * only way to recover from such conditions.
1647 if (isp->crashed || isp->stop_failure)
1649 isp_disable_clocks(isp);
1651 mutex_unlock(&isp->isp_mutex);
1654 /* --------------------------------------------------------------------------
1655 * Platform device driver
1659 * omap3isp_print_status - Prints the values of the ISP Control Module registers
1660 * @isp: OMAP3 ISP device
1662 #define ISP_PRINT_REGISTER(isp, name)\
1663 dev_dbg(isp->dev, "###ISP " #name "=0x%08x\n", \
1664 isp_reg_readl(isp, OMAP3_ISP_IOMEM_MAIN, ISP_##name))
1665 #define SBL_PRINT_REGISTER(isp, name)\
1666 dev_dbg(isp->dev, "###SBL " #name "=0x%08x\n", \
1667 isp_reg_readl(isp, OMAP3_ISP_IOMEM_SBL, ISPSBL_##name))
1669 void omap3isp_print_status(struct isp_device *isp)
1671 dev_dbg(isp->dev, "-------------ISP Register dump--------------\n");
1673 ISP_PRINT_REGISTER(isp, SYSCONFIG);
1674 ISP_PRINT_REGISTER(isp, SYSSTATUS);
1675 ISP_PRINT_REGISTER(isp, IRQ0ENABLE);
1676 ISP_PRINT_REGISTER(isp, IRQ0STATUS);
1677 ISP_PRINT_REGISTER(isp, TCTRL_GRESET_LENGTH);
1678 ISP_PRINT_REGISTER(isp, TCTRL_PSTRB_REPLAY);
1679 ISP_PRINT_REGISTER(isp, CTRL);
1680 ISP_PRINT_REGISTER(isp, TCTRL_CTRL);
1681 ISP_PRINT_REGISTER(isp, TCTRL_FRAME);
1682 ISP_PRINT_REGISTER(isp, TCTRL_PSTRB_DELAY);
1683 ISP_PRINT_REGISTER(isp, TCTRL_STRB_DELAY);
1684 ISP_PRINT_REGISTER(isp, TCTRL_SHUT_DELAY);
1685 ISP_PRINT_REGISTER(isp, TCTRL_PSTRB_LENGTH);
1686 ISP_PRINT_REGISTER(isp, TCTRL_STRB_LENGTH);
1687 ISP_PRINT_REGISTER(isp, TCTRL_SHUT_LENGTH);
1689 SBL_PRINT_REGISTER(isp, PCR);
1690 SBL_PRINT_REGISTER(isp, SDR_REQ_EXP);
1692 dev_dbg(isp->dev, "--------------------------------------------\n");
1698 * Power management support.
1700 * As the ISP can't properly handle an input video stream interruption on a non
1701 * frame boundary, the ISP pipelines need to be stopped before sensors get
1702 * suspended. However, as suspending the sensors can require a running clock,
1703 * which can be provided by the ISP, the ISP can't be completely suspended
1704 * before the sensor.
1706 * To solve this problem power management support is split into prepare/complete
1707 * and suspend/resume operations. The pipelines are stopped in prepare() and the
1708 * ISP clocks get disabled in suspend(). Similarly, the clocks are reenabled in
1709 * resume(), and the the pipelines are restarted in complete().
1711 * TODO: PM dependencies between the ISP and sensors are not modelled explicitly
1714 static int isp_pm_prepare(struct device *dev)
1716 struct isp_device *isp = dev_get_drvdata(dev);
1719 WARN_ON(mutex_is_locked(&isp->isp_mutex));
1721 if (isp->ref_count == 0)
1724 reset = isp_suspend_modules(isp);
1725 isp_disable_interrupts(isp);
1733 static int isp_pm_suspend(struct device *dev)
1735 struct isp_device *isp = dev_get_drvdata(dev);
1737 WARN_ON(mutex_is_locked(&isp->isp_mutex));
1740 isp_disable_clocks(isp);
1745 static int isp_pm_resume(struct device *dev)
1747 struct isp_device *isp = dev_get_drvdata(dev);
1749 if (isp->ref_count == 0)
1752 return isp_enable_clocks(isp);
1755 static void isp_pm_complete(struct device *dev)
1757 struct isp_device *isp = dev_get_drvdata(dev);
1759 if (isp->ref_count == 0)
1762 isp_restore_ctx(isp);
1763 isp_enable_interrupts(isp);
1764 isp_resume_modules(isp);
1769 #define isp_pm_prepare NULL
1770 #define isp_pm_suspend NULL
1771 #define isp_pm_resume NULL
1772 #define isp_pm_complete NULL
1774 #endif /* CONFIG_PM */
1776 static void isp_unregister_entities(struct isp_device *isp)
1778 omap3isp_csi2_unregister_entities(&isp->isp_csi2a);
1779 omap3isp_ccp2_unregister_entities(&isp->isp_ccp2);
1780 omap3isp_ccdc_unregister_entities(&isp->isp_ccdc);
1781 omap3isp_preview_unregister_entities(&isp->isp_prev);
1782 omap3isp_resizer_unregister_entities(&isp->isp_res);
1783 omap3isp_stat_unregister_entities(&isp->isp_aewb);
1784 omap3isp_stat_unregister_entities(&isp->isp_af);
1785 omap3isp_stat_unregister_entities(&isp->isp_hist);
1787 v4l2_device_unregister(&isp->v4l2_dev);
1788 media_device_unregister(&isp->media_dev);
1792 * isp_register_subdev_group - Register a group of subdevices
1793 * @isp: OMAP3 ISP device
1794 * @board_info: I2C subdevs board information array
1796 * Register all I2C subdevices in the board_info array. The array must be
1797 * terminated by a NULL entry, and the first entry must be the sensor.
1799 * Return a pointer to the sensor media entity if it has been successfully
1800 * registered, or NULL otherwise.
1802 static struct v4l2_subdev *
1803 isp_register_subdev_group(struct isp_device *isp,
1804 struct isp_subdev_i2c_board_info *board_info)
1806 struct v4l2_subdev *sensor = NULL;
1809 if (board_info->board_info == NULL)
1812 for (first = 1; board_info->board_info; ++board_info, first = 0) {
1813 struct v4l2_subdev *subdev;
1814 struct i2c_adapter *adapter;
1816 adapter = i2c_get_adapter(board_info->i2c_adapter_id);
1817 if (adapter == NULL) {
1818 dev_err(isp->dev, "%s: Unable to get I2C adapter %d for "
1819 "device %s\n", __func__,
1820 board_info->i2c_adapter_id,
1821 board_info->board_info->type);
1825 subdev = v4l2_i2c_new_subdev_board(&isp->v4l2_dev, adapter,
1826 board_info->board_info, NULL);
1827 if (subdev == NULL) {
1828 dev_err(isp->dev, "%s: Unable to register subdev %s\n",
1829 __func__, board_info->board_info->type);
1840 static int isp_register_entities(struct isp_device *isp)
1842 struct isp_platform_data *pdata = isp->pdata;
1843 struct isp_v4l2_subdevs_group *subdevs;
1846 isp->media_dev.dev = isp->dev;
1847 strlcpy(isp->media_dev.model, "TI OMAP3 ISP",
1848 sizeof(isp->media_dev.model));
1849 isp->media_dev.hw_revision = isp->revision;
1850 isp->media_dev.link_notify = isp_pipeline_link_notify;
1851 ret = media_device_register(&isp->media_dev);
1853 dev_err(isp->dev, "%s: Media device registration failed (%d)\n",
1858 isp->v4l2_dev.mdev = &isp->media_dev;
1859 ret = v4l2_device_register(isp->dev, &isp->v4l2_dev);
1861 dev_err(isp->dev, "%s: V4L2 device registration failed (%d)\n",
1866 /* Register internal entities */
1867 ret = omap3isp_ccp2_register_entities(&isp->isp_ccp2, &isp->v4l2_dev);
1871 ret = omap3isp_csi2_register_entities(&isp->isp_csi2a, &isp->v4l2_dev);
1875 ret = omap3isp_ccdc_register_entities(&isp->isp_ccdc, &isp->v4l2_dev);
1879 ret = omap3isp_preview_register_entities(&isp->isp_prev,
1884 ret = omap3isp_resizer_register_entities(&isp->isp_res, &isp->v4l2_dev);
1888 ret = omap3isp_stat_register_entities(&isp->isp_aewb, &isp->v4l2_dev);
1892 ret = omap3isp_stat_register_entities(&isp->isp_af, &isp->v4l2_dev);
1896 ret = omap3isp_stat_register_entities(&isp->isp_hist, &isp->v4l2_dev);
1900 /* Register external entities */
1901 for (subdevs = pdata->subdevs; subdevs && subdevs->subdevs; ++subdevs) {
1902 struct v4l2_subdev *sensor;
1903 struct media_entity *input;
1908 sensor = isp_register_subdev_group(isp, subdevs->subdevs);
1912 sensor->host_priv = subdevs;
1914 /* Connect the sensor to the correct interface module. Parallel
1915 * sensors are connected directly to the CCDC, while serial
1916 * sensors are connected to the CSI2a, CCP2b or CSI2c receiver
1917 * through CSIPHY1 or CSIPHY2.
1919 switch (subdevs->interface) {
1920 case ISP_INTERFACE_PARALLEL:
1921 input = &isp->isp_ccdc.subdev.entity;
1922 pad = CCDC_PAD_SINK;
1926 case ISP_INTERFACE_CSI2A_PHY2:
1927 input = &isp->isp_csi2a.subdev.entity;
1928 pad = CSI2_PAD_SINK;
1929 flags = MEDIA_LNK_FL_IMMUTABLE
1930 | MEDIA_LNK_FL_ENABLED;
1933 case ISP_INTERFACE_CCP2B_PHY1:
1934 case ISP_INTERFACE_CCP2B_PHY2:
1935 input = &isp->isp_ccp2.subdev.entity;
1936 pad = CCP2_PAD_SINK;
1940 case ISP_INTERFACE_CSI2C_PHY1:
1941 input = &isp->isp_csi2c.subdev.entity;
1942 pad = CSI2_PAD_SINK;
1943 flags = MEDIA_LNK_FL_IMMUTABLE
1944 | MEDIA_LNK_FL_ENABLED;
1948 dev_err(isp->dev, "%s: invalid interface type %u\n",
1949 __func__, subdevs->interface);
1954 for (i = 0; i < sensor->entity.num_pads; i++) {
1955 if (sensor->entity.pads[i].flags & MEDIA_PAD_FL_SOURCE)
1958 if (i == sensor->entity.num_pads) {
1960 "%s: no source pad in external entity\n",
1966 ret = media_entity_create_link(&sensor->entity, i, input, pad,
1972 ret = v4l2_device_register_subdev_nodes(&isp->v4l2_dev);
1976 isp_unregister_entities(isp);
1981 static void isp_cleanup_modules(struct isp_device *isp)
1983 omap3isp_h3a_aewb_cleanup(isp);
1984 omap3isp_h3a_af_cleanup(isp);
1985 omap3isp_hist_cleanup(isp);
1986 omap3isp_resizer_cleanup(isp);
1987 omap3isp_preview_cleanup(isp);
1988 omap3isp_ccdc_cleanup(isp);
1989 omap3isp_ccp2_cleanup(isp);
1990 omap3isp_csi2_cleanup(isp);
1993 static int isp_initialize_modules(struct isp_device *isp)
1997 ret = omap3isp_csiphy_init(isp);
1999 dev_err(isp->dev, "CSI PHY initialization failed\n");
2003 ret = omap3isp_csi2_init(isp);
2005 dev_err(isp->dev, "CSI2 initialization failed\n");
2009 ret = omap3isp_ccp2_init(isp);
2011 dev_err(isp->dev, "CCP2 initialization failed\n");
2015 ret = omap3isp_ccdc_init(isp);
2017 dev_err(isp->dev, "CCDC initialization failed\n");
2021 ret = omap3isp_preview_init(isp);
2023 dev_err(isp->dev, "Preview initialization failed\n");
2027 ret = omap3isp_resizer_init(isp);
2029 dev_err(isp->dev, "Resizer initialization failed\n");
2033 ret = omap3isp_hist_init(isp);
2035 dev_err(isp->dev, "Histogram initialization failed\n");
2039 ret = omap3isp_h3a_aewb_init(isp);
2041 dev_err(isp->dev, "H3A AEWB initialization failed\n");
2042 goto error_h3a_aewb;
2045 ret = omap3isp_h3a_af_init(isp);
2047 dev_err(isp->dev, "H3A AF initialization failed\n");
2051 /* Connect the submodules. */
2052 ret = media_entity_create_link(
2053 &isp->isp_csi2a.subdev.entity, CSI2_PAD_SOURCE,
2054 &isp->isp_ccdc.subdev.entity, CCDC_PAD_SINK, 0);
2058 ret = media_entity_create_link(
2059 &isp->isp_ccp2.subdev.entity, CCP2_PAD_SOURCE,
2060 &isp->isp_ccdc.subdev.entity, CCDC_PAD_SINK, 0);
2064 ret = media_entity_create_link(
2065 &isp->isp_ccdc.subdev.entity, CCDC_PAD_SOURCE_VP,
2066 &isp->isp_prev.subdev.entity, PREV_PAD_SINK, 0);
2070 ret = media_entity_create_link(
2071 &isp->isp_ccdc.subdev.entity, CCDC_PAD_SOURCE_OF,
2072 &isp->isp_res.subdev.entity, RESZ_PAD_SINK, 0);
2076 ret = media_entity_create_link(
2077 &isp->isp_prev.subdev.entity, PREV_PAD_SOURCE,
2078 &isp->isp_res.subdev.entity, RESZ_PAD_SINK, 0);
2082 ret = media_entity_create_link(
2083 &isp->isp_ccdc.subdev.entity, CCDC_PAD_SOURCE_VP,
2084 &isp->isp_aewb.subdev.entity, 0,
2085 MEDIA_LNK_FL_ENABLED | MEDIA_LNK_FL_IMMUTABLE);
2089 ret = media_entity_create_link(
2090 &isp->isp_ccdc.subdev.entity, CCDC_PAD_SOURCE_VP,
2091 &isp->isp_af.subdev.entity, 0,
2092 MEDIA_LNK_FL_ENABLED | MEDIA_LNK_FL_IMMUTABLE);
2096 ret = media_entity_create_link(
2097 &isp->isp_ccdc.subdev.entity, CCDC_PAD_SOURCE_VP,
2098 &isp->isp_hist.subdev.entity, 0,
2099 MEDIA_LNK_FL_ENABLED | MEDIA_LNK_FL_IMMUTABLE);
2106 omap3isp_h3a_af_cleanup(isp);
2108 omap3isp_h3a_aewb_cleanup(isp);
2110 omap3isp_hist_cleanup(isp);
2112 omap3isp_resizer_cleanup(isp);
2114 omap3isp_preview_cleanup(isp);
2116 omap3isp_ccdc_cleanup(isp);
2118 omap3isp_ccp2_cleanup(isp);
2120 omap3isp_csi2_cleanup(isp);
2127 * isp_remove - Remove ISP platform device
2128 * @pdev: Pointer to ISP platform device
2132 static int isp_remove(struct platform_device *pdev)
2134 struct isp_device *isp = platform_get_drvdata(pdev);
2136 isp_unregister_entities(isp);
2137 isp_cleanup_modules(isp);
2138 isp_xclk_cleanup(isp);
2140 __omap3isp_get(isp, false);
2141 iommu_detach_device(isp->domain, &pdev->dev);
2142 iommu_domain_free(isp->domain);
2149 static int isp_map_mem_resource(struct platform_device *pdev,
2150 struct isp_device *isp,
2151 enum isp_mem_resources res)
2153 struct resource *mem;
2155 /* request the mem region for the camera registers */
2157 mem = platform_get_resource(pdev, IORESOURCE_MEM, res);
2159 /* map the region */
2160 isp->mmio_base[res] = devm_ioremap_resource(isp->dev, mem);
2161 if (IS_ERR(isp->mmio_base[res]))
2162 return PTR_ERR(isp->mmio_base[res]);
2164 isp->mmio_base_phys[res] = mem->start;
2170 * isp_probe - Probe ISP platform device
2171 * @pdev: Pointer to ISP platform device
2173 * Returns 0 if successful,
2174 * -ENOMEM if no memory available,
2175 * -ENODEV if no platform device resources found
2176 * or no space for remapping registers,
2177 * -EINVAL if couldn't install ISR,
2178 * or clk_get return error value.
2180 static int isp_probe(struct platform_device *pdev)
2182 struct isp_platform_data *pdata = pdev->dev.platform_data;
2183 struct isp_device *isp;
2190 isp = devm_kzalloc(&pdev->dev, sizeof(*isp), GFP_KERNEL);
2192 dev_err(&pdev->dev, "could not allocate memory\n");
2196 isp->autoidle = autoidle;
2198 mutex_init(&isp->isp_mutex);
2199 spin_lock_init(&isp->stat_lock);
2201 isp->dev = &pdev->dev;
2205 ret = dma_coerce_mask_and_coherent(isp->dev, DMA_BIT_MASK(32));
2209 platform_set_drvdata(pdev, isp);
2212 isp->isp_csiphy1.vdd = devm_regulator_get(&pdev->dev, "VDD_CSIPHY1");
2213 isp->isp_csiphy2.vdd = devm_regulator_get(&pdev->dev, "VDD_CSIPHY2");
2217 * The ISP clock tree is revision-dependent. We thus need to enable ICLK
2218 * manually to read the revision before calling __omap3isp_get().
2220 ret = isp_map_mem_resource(pdev, isp, OMAP3_ISP_IOMEM_MAIN);
2224 ret = isp_get_clocks(isp);
2228 ret = clk_enable(isp->clock[ISP_CLK_CAM_ICK]);
2232 isp->revision = isp_reg_readl(isp, OMAP3_ISP_IOMEM_MAIN, ISP_REVISION);
2233 dev_info(isp->dev, "Revision %d.%d found\n",
2234 (isp->revision & 0xf0) >> 4, isp->revision & 0x0f);
2236 clk_disable(isp->clock[ISP_CLK_CAM_ICK]);
2238 if (__omap3isp_get(isp, false) == NULL) {
2243 ret = isp_reset(isp);
2247 ret = isp_xclk_init(isp);
2251 /* Memory resources */
2252 for (m = 0; m < ARRAY_SIZE(isp_res_maps); m++)
2253 if (isp->revision == isp_res_maps[m].isp_rev)
2256 if (m == ARRAY_SIZE(isp_res_maps)) {
2257 dev_err(isp->dev, "No resource map found for ISP rev %d.%d\n",
2258 (isp->revision & 0xf0) >> 4, isp->revision & 0xf);
2263 for (i = 1; i < OMAP3_ISP_IOMEM_LAST; i++) {
2264 if (isp_res_maps[m].map & 1 << i) {
2265 ret = isp_map_mem_resource(pdev, isp, i);
2271 isp->domain = iommu_domain_alloc(pdev->dev.bus);
2273 dev_err(isp->dev, "can't alloc iommu domain\n");
2278 ret = iommu_attach_device(isp->domain, &pdev->dev);
2280 dev_err(&pdev->dev, "can't attach iommu device: %d\n", ret);
2281 ret = -EPROBE_DEFER;
2286 isp->irq_num = platform_get_irq(pdev, 0);
2287 if (isp->irq_num <= 0) {
2288 dev_err(isp->dev, "No IRQ resource\n");
2293 if (devm_request_irq(isp->dev, isp->irq_num, isp_isr, IRQF_SHARED,
2294 "OMAP3 ISP", isp)) {
2295 dev_err(isp->dev, "Unable to request IRQ\n");
2301 ret = isp_initialize_modules(isp);
2305 ret = isp_register_entities(isp);
2309 isp_core_init(isp, 1);
2315 isp_cleanup_modules(isp);
2317 iommu_detach_device(isp->domain, &pdev->dev);
2319 iommu_domain_free(isp->domain);
2322 isp_xclk_cleanup(isp);
2325 mutex_destroy(&isp->isp_mutex);
2330 static const struct dev_pm_ops omap3isp_pm_ops = {
2331 .prepare = isp_pm_prepare,
2332 .suspend = isp_pm_suspend,
2333 .resume = isp_pm_resume,
2334 .complete = isp_pm_complete,
2337 static struct platform_device_id omap3isp_id_table[] = {
2341 MODULE_DEVICE_TABLE(platform, omap3isp_id_table);
2343 static struct platform_driver omap3isp_driver = {
2345 .remove = isp_remove,
2346 .id_table = omap3isp_id_table,
2348 .owner = THIS_MODULE,
2350 .pm = &omap3isp_pm_ops,
2354 module_platform_driver(omap3isp_driver);
2356 MODULE_AUTHOR("Nokia Corporation");
2357 MODULE_DESCRIPTION("TI OMAP3 ISP driver");
2358 MODULE_LICENSE("GPL");
2359 MODULE_VERSION(ISP_VIDEO_DRIVER_VERSION);