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.
45 #include <asm/cacheflush.h>
47 #include <linux/clk.h>
48 #include <linux/clkdev.h>
49 #include <linux/delay.h>
50 #include <linux/device.h>
51 #include <linux/dma-mapping.h>
52 #include <linux/i2c.h>
53 #include <linux/interrupt.h>
54 #include <linux/mfd/syscon.h>
55 #include <linux/module.h>
56 #include <linux/omap-iommu.h>
57 #include <linux/platform_device.h>
58 #include <linux/regulator/consumer.h>
59 #include <linux/slab.h>
60 #include <linux/sched.h>
61 #include <linux/vmalloc.h>
63 #include <asm/dma-iommu.h>
65 #include <media/v4l2-common.h>
66 #include <media/v4l2-device.h>
67 #include <media/v4l2-mc.h>
68 #include <media/v4l2-of.h>
73 #include "isppreview.h"
74 #include "ispresizer.h"
80 static unsigned int autoidle;
81 module_param(autoidle, int, 0444);
82 MODULE_PARM_DESC(autoidle, "Enable OMAP3ISP AUTOIDLE support");
84 static void isp_save_ctx(struct isp_device *isp);
86 static void isp_restore_ctx(struct isp_device *isp);
88 static const struct isp_res_mapping isp_res_maps[] = {
90 .isp_rev = ISP_REVISION_2_0,
93 0x0000, /* base, len 0x0070 */
94 0x0400, /* ccp2, len 0x01f0 */
95 0x0600, /* ccdc, len 0x00a8 */
96 0x0a00, /* hist, len 0x0048 */
97 0x0c00, /* h3a, len 0x0060 */
98 0x0e00, /* preview, len 0x00a0 */
99 0x1000, /* resizer, len 0x00ac */
100 0x1200, /* sbl, len 0x00fc */
101 /* second MMIO area */
102 0x0000, /* csi2a, len 0x0170 */
103 0x0170, /* csiphy2, len 0x000c */
105 .phy_type = ISP_PHY_TYPE_3430,
108 .isp_rev = ISP_REVISION_15_0,
110 /* first MMIO area */
111 0x0000, /* base, len 0x0070 */
112 0x0400, /* ccp2, len 0x01f0 */
113 0x0600, /* ccdc, len 0x00a8 */
114 0x0a00, /* hist, len 0x0048 */
115 0x0c00, /* h3a, len 0x0060 */
116 0x0e00, /* preview, len 0x00a0 */
117 0x1000, /* resizer, len 0x00ac */
118 0x1200, /* sbl, len 0x00fc */
119 /* second MMIO area */
120 0x0000, /* csi2a, len 0x0170 (1st area) */
121 0x0170, /* csiphy2, len 0x000c */
122 0x01c0, /* csi2a, len 0x0040 (2nd area) */
123 0x0400, /* csi2c, len 0x0170 (1st area) */
124 0x0570, /* csiphy1, len 0x000c */
125 0x05c0, /* csi2c, len 0x0040 (2nd area) */
127 .phy_type = ISP_PHY_TYPE_3630,
131 /* Structure for saving/restoring ISP module registers */
132 static struct isp_reg isp_reg_list[] = {
133 {OMAP3_ISP_IOMEM_MAIN, ISP_SYSCONFIG, 0},
134 {OMAP3_ISP_IOMEM_MAIN, ISP_CTRL, 0},
135 {OMAP3_ISP_IOMEM_MAIN, ISP_TCTRL_CTRL, 0},
140 * omap3isp_flush - Post pending L3 bus writes by doing a register readback
141 * @isp: OMAP3 ISP device
143 * In order to force posting of pending writes, we need to write and
144 * readback the same register, in this case the revision register.
146 * See this link for reference:
147 * http://www.mail-archive.com/linux-omap@vger.kernel.org/msg08149.html
149 void omap3isp_flush(struct isp_device *isp)
151 isp_reg_writel(isp, 0, OMAP3_ISP_IOMEM_MAIN, ISP_REVISION);
152 isp_reg_readl(isp, OMAP3_ISP_IOMEM_MAIN, ISP_REVISION);
155 /* -----------------------------------------------------------------------------
159 #define to_isp_xclk(_hw) container_of(_hw, struct isp_xclk, hw)
161 static void isp_xclk_update(struct isp_xclk *xclk, u32 divider)
165 isp_reg_clr_set(xclk->isp, OMAP3_ISP_IOMEM_MAIN, ISP_TCTRL_CTRL,
166 ISPTCTRL_CTRL_DIVA_MASK,
167 divider << ISPTCTRL_CTRL_DIVA_SHIFT);
170 isp_reg_clr_set(xclk->isp, OMAP3_ISP_IOMEM_MAIN, ISP_TCTRL_CTRL,
171 ISPTCTRL_CTRL_DIVB_MASK,
172 divider << ISPTCTRL_CTRL_DIVB_SHIFT);
177 static int isp_xclk_prepare(struct clk_hw *hw)
179 struct isp_xclk *xclk = to_isp_xclk(hw);
181 omap3isp_get(xclk->isp);
186 static void isp_xclk_unprepare(struct clk_hw *hw)
188 struct isp_xclk *xclk = to_isp_xclk(hw);
190 omap3isp_put(xclk->isp);
193 static int isp_xclk_enable(struct clk_hw *hw)
195 struct isp_xclk *xclk = to_isp_xclk(hw);
198 spin_lock_irqsave(&xclk->lock, flags);
199 isp_xclk_update(xclk, xclk->divider);
200 xclk->enabled = true;
201 spin_unlock_irqrestore(&xclk->lock, flags);
206 static void isp_xclk_disable(struct clk_hw *hw)
208 struct isp_xclk *xclk = to_isp_xclk(hw);
211 spin_lock_irqsave(&xclk->lock, flags);
212 isp_xclk_update(xclk, 0);
213 xclk->enabled = false;
214 spin_unlock_irqrestore(&xclk->lock, flags);
217 static unsigned long isp_xclk_recalc_rate(struct clk_hw *hw,
218 unsigned long parent_rate)
220 struct isp_xclk *xclk = to_isp_xclk(hw);
222 return parent_rate / xclk->divider;
225 static u32 isp_xclk_calc_divider(unsigned long *rate, unsigned long parent_rate)
229 if (*rate >= parent_rate) {
231 return ISPTCTRL_CTRL_DIV_BYPASS;
237 divider = DIV_ROUND_CLOSEST(parent_rate, *rate);
238 if (divider >= ISPTCTRL_CTRL_DIV_BYPASS)
239 divider = ISPTCTRL_CTRL_DIV_BYPASS - 1;
241 *rate = parent_rate / divider;
245 static long isp_xclk_round_rate(struct clk_hw *hw, unsigned long rate,
246 unsigned long *parent_rate)
248 isp_xclk_calc_divider(&rate, *parent_rate);
252 static int isp_xclk_set_rate(struct clk_hw *hw, unsigned long rate,
253 unsigned long parent_rate)
255 struct isp_xclk *xclk = to_isp_xclk(hw);
259 divider = isp_xclk_calc_divider(&rate, parent_rate);
261 spin_lock_irqsave(&xclk->lock, flags);
263 xclk->divider = divider;
265 isp_xclk_update(xclk, divider);
267 spin_unlock_irqrestore(&xclk->lock, flags);
269 dev_dbg(xclk->isp->dev, "%s: cam_xclk%c set to %lu Hz (div %u)\n",
270 __func__, xclk->id == ISP_XCLK_A ? 'a' : 'b', rate, divider);
274 static const struct clk_ops isp_xclk_ops = {
275 .prepare = isp_xclk_prepare,
276 .unprepare = isp_xclk_unprepare,
277 .enable = isp_xclk_enable,
278 .disable = isp_xclk_disable,
279 .recalc_rate = isp_xclk_recalc_rate,
280 .round_rate = isp_xclk_round_rate,
281 .set_rate = isp_xclk_set_rate,
284 static const char *isp_xclk_parent_name = "cam_mclk";
286 static const struct clk_init_data isp_xclk_init_data = {
288 .ops = &isp_xclk_ops,
289 .parent_names = &isp_xclk_parent_name,
293 static struct clk *isp_xclk_src_get(struct of_phandle_args *clkspec, void *data)
295 unsigned int idx = clkspec->args[0];
296 struct isp_device *isp = data;
298 if (idx >= ARRAY_SIZE(isp->xclks))
299 return ERR_PTR(-ENOENT);
301 return isp->xclks[idx].clk;
304 static int isp_xclk_init(struct isp_device *isp)
306 struct device_node *np = isp->dev->of_node;
307 struct clk_init_data init = { 0 };
310 for (i = 0; i < ARRAY_SIZE(isp->xclks); ++i)
311 isp->xclks[i].clk = ERR_PTR(-EINVAL);
313 for (i = 0; i < ARRAY_SIZE(isp->xclks); ++i) {
314 struct isp_xclk *xclk = &isp->xclks[i];
317 xclk->id = i == 0 ? ISP_XCLK_A : ISP_XCLK_B;
319 spin_lock_init(&xclk->lock);
321 init.name = i == 0 ? "cam_xclka" : "cam_xclkb";
322 init.ops = &isp_xclk_ops;
323 init.parent_names = &isp_xclk_parent_name;
324 init.num_parents = 1;
326 xclk->hw.init = &init;
328 * The first argument is NULL in order to avoid circular
329 * reference, as this driver takes reference on the
330 * sensor subdevice modules and the sensors would take
331 * reference on this module through clk_get().
333 xclk->clk = clk_register(NULL, &xclk->hw);
334 if (IS_ERR(xclk->clk))
335 return PTR_ERR(xclk->clk);
339 of_clk_add_provider(np, isp_xclk_src_get, isp);
344 static void isp_xclk_cleanup(struct isp_device *isp)
346 struct device_node *np = isp->dev->of_node;
350 of_clk_del_provider(np);
352 for (i = 0; i < ARRAY_SIZE(isp->xclks); ++i) {
353 struct isp_xclk *xclk = &isp->xclks[i];
355 if (!IS_ERR(xclk->clk))
356 clk_unregister(xclk->clk);
360 /* -----------------------------------------------------------------------------
365 * isp_enable_interrupts - Enable ISP interrupts.
366 * @isp: OMAP3 ISP device
368 static void isp_enable_interrupts(struct isp_device *isp)
370 static const u32 irq = IRQ0ENABLE_CSIA_IRQ
371 | IRQ0ENABLE_CSIB_IRQ
372 | IRQ0ENABLE_CCDC_LSC_PREF_ERR_IRQ
373 | IRQ0ENABLE_CCDC_LSC_DONE_IRQ
374 | IRQ0ENABLE_CCDC_VD0_IRQ
375 | IRQ0ENABLE_CCDC_VD1_IRQ
376 | IRQ0ENABLE_HS_VS_IRQ
377 | IRQ0ENABLE_HIST_DONE_IRQ
378 | IRQ0ENABLE_H3A_AWB_DONE_IRQ
379 | IRQ0ENABLE_H3A_AF_DONE_IRQ
380 | IRQ0ENABLE_PRV_DONE_IRQ
381 | IRQ0ENABLE_RSZ_DONE_IRQ;
383 isp_reg_writel(isp, irq, OMAP3_ISP_IOMEM_MAIN, ISP_IRQ0STATUS);
384 isp_reg_writel(isp, irq, OMAP3_ISP_IOMEM_MAIN, ISP_IRQ0ENABLE);
388 * isp_disable_interrupts - Disable ISP interrupts.
389 * @isp: OMAP3 ISP device
391 static void isp_disable_interrupts(struct isp_device *isp)
393 isp_reg_writel(isp, 0, OMAP3_ISP_IOMEM_MAIN, ISP_IRQ0ENABLE);
397 * isp_core_init - ISP core settings
398 * @isp: OMAP3 ISP device
399 * @idle: Consider idle state.
401 * Set the power settings for the ISP and SBL bus and configure the HS/VS
404 * We need to configure the HS/VS interrupt source before interrupts get
405 * enabled, as the sensor might be free-running and the ISP default setting
406 * (HS edge) would put an unnecessary burden on the CPU.
408 static void isp_core_init(struct isp_device *isp, int idle)
411 ((idle ? ISP_SYSCONFIG_MIDLEMODE_SMARTSTANDBY :
412 ISP_SYSCONFIG_MIDLEMODE_FORCESTANDBY) <<
413 ISP_SYSCONFIG_MIDLEMODE_SHIFT) |
414 ((isp->revision == ISP_REVISION_15_0) ?
415 ISP_SYSCONFIG_AUTOIDLE : 0),
416 OMAP3_ISP_IOMEM_MAIN, ISP_SYSCONFIG);
419 (isp->autoidle ? ISPCTRL_SBL_AUTOIDLE : 0) |
420 ISPCTRL_SYNC_DETECT_VSRISE,
421 OMAP3_ISP_IOMEM_MAIN, ISP_CTRL);
425 * Configure the bridge and lane shifter. Valid inputs are
427 * CCDC_INPUT_PARALLEL: Parallel interface
428 * CCDC_INPUT_CSI2A: CSI2a receiver
429 * CCDC_INPUT_CCP2B: CCP2b receiver
430 * CCDC_INPUT_CSI2C: CSI2c receiver
432 * The bridge and lane shifter are configured according to the selected input
433 * and the ISP platform data.
435 void omap3isp_configure_bridge(struct isp_device *isp,
436 enum ccdc_input_entity input,
437 const struct isp_parallel_cfg *parcfg,
438 unsigned int shift, unsigned int bridge)
442 ispctrl_val = isp_reg_readl(isp, OMAP3_ISP_IOMEM_MAIN, ISP_CTRL);
443 ispctrl_val &= ~ISPCTRL_SHIFT_MASK;
444 ispctrl_val &= ~ISPCTRL_PAR_CLK_POL_INV;
445 ispctrl_val &= ~ISPCTRL_PAR_SER_CLK_SEL_MASK;
446 ispctrl_val &= ~ISPCTRL_PAR_BRIDGE_MASK;
447 ispctrl_val |= bridge;
450 case CCDC_INPUT_PARALLEL:
451 ispctrl_val |= ISPCTRL_PAR_SER_CLK_SEL_PARALLEL;
452 ispctrl_val |= parcfg->clk_pol << ISPCTRL_PAR_CLK_POL_SHIFT;
453 shift += parcfg->data_lane_shift;
456 case CCDC_INPUT_CSI2A:
457 ispctrl_val |= ISPCTRL_PAR_SER_CLK_SEL_CSIA;
460 case CCDC_INPUT_CCP2B:
461 ispctrl_val |= ISPCTRL_PAR_SER_CLK_SEL_CSIB;
464 case CCDC_INPUT_CSI2C:
465 ispctrl_val |= ISPCTRL_PAR_SER_CLK_SEL_CSIC;
472 ispctrl_val |= ((shift/2) << ISPCTRL_SHIFT_SHIFT) & ISPCTRL_SHIFT_MASK;
474 isp_reg_writel(isp, ispctrl_val, OMAP3_ISP_IOMEM_MAIN, ISP_CTRL);
477 void omap3isp_hist_dma_done(struct isp_device *isp)
479 if (omap3isp_ccdc_busy(&isp->isp_ccdc) ||
480 omap3isp_stat_pcr_busy(&isp->isp_hist)) {
481 /* Histogram cannot be enabled in this frame anymore */
482 atomic_set(&isp->isp_hist.buf_err, 1);
483 dev_dbg(isp->dev, "hist: Out of synchronization with "
484 "CCDC. Ignoring next buffer.\n");
488 static inline void isp_isr_dbg(struct isp_device *isp, u32 irqstatus)
490 static const char *name[] = {
509 "CCDC_LSC_PREFETCH_COMPLETED",
510 "CCDC_LSC_PREFETCH_ERROR",
526 dev_dbg(isp->dev, "ISP IRQ: ");
528 for (i = 0; i < ARRAY_SIZE(name); i++) {
529 if ((1 << i) & irqstatus)
530 printk(KERN_CONT "%s ", name[i]);
532 printk(KERN_CONT "\n");
535 static void isp_isr_sbl(struct isp_device *isp)
537 struct device *dev = isp->dev;
538 struct isp_pipeline *pipe;
542 * Handle shared buffer logic overflows for video buffers.
543 * ISPSBL_PCR_CCDCPRV_2_RSZ_OVF can be safely ignored.
545 sbl_pcr = isp_reg_readl(isp, OMAP3_ISP_IOMEM_SBL, ISPSBL_PCR);
546 isp_reg_writel(isp, sbl_pcr, OMAP3_ISP_IOMEM_SBL, ISPSBL_PCR);
547 sbl_pcr &= ~ISPSBL_PCR_CCDCPRV_2_RSZ_OVF;
550 dev_dbg(dev, "SBL overflow (PCR = 0x%08x)\n", sbl_pcr);
552 if (sbl_pcr & ISPSBL_PCR_CSIB_WBL_OVF) {
553 pipe = to_isp_pipeline(&isp->isp_ccp2.subdev.entity);
558 if (sbl_pcr & ISPSBL_PCR_CSIA_WBL_OVF) {
559 pipe = to_isp_pipeline(&isp->isp_csi2a.subdev.entity);
564 if (sbl_pcr & ISPSBL_PCR_CCDC_WBL_OVF) {
565 pipe = to_isp_pipeline(&isp->isp_ccdc.subdev.entity);
570 if (sbl_pcr & ISPSBL_PCR_PRV_WBL_OVF) {
571 pipe = to_isp_pipeline(&isp->isp_prev.subdev.entity);
576 if (sbl_pcr & (ISPSBL_PCR_RSZ1_WBL_OVF
577 | ISPSBL_PCR_RSZ2_WBL_OVF
578 | ISPSBL_PCR_RSZ3_WBL_OVF
579 | ISPSBL_PCR_RSZ4_WBL_OVF)) {
580 pipe = to_isp_pipeline(&isp->isp_res.subdev.entity);
585 if (sbl_pcr & ISPSBL_PCR_H3A_AF_WBL_OVF)
586 omap3isp_stat_sbl_overflow(&isp->isp_af);
588 if (sbl_pcr & ISPSBL_PCR_H3A_AEAWB_WBL_OVF)
589 omap3isp_stat_sbl_overflow(&isp->isp_aewb);
593 * isp_isr - Interrupt Service Routine for Camera ISP module.
594 * @irq: Not used currently.
595 * @_isp: Pointer to the OMAP3 ISP device
597 * Handles the corresponding callback if plugged in.
599 static irqreturn_t isp_isr(int irq, void *_isp)
601 static const u32 ccdc_events = IRQ0STATUS_CCDC_LSC_PREF_ERR_IRQ |
602 IRQ0STATUS_CCDC_LSC_DONE_IRQ |
603 IRQ0STATUS_CCDC_VD0_IRQ |
604 IRQ0STATUS_CCDC_VD1_IRQ |
605 IRQ0STATUS_HS_VS_IRQ;
606 struct isp_device *isp = _isp;
609 irqstatus = isp_reg_readl(isp, OMAP3_ISP_IOMEM_MAIN, ISP_IRQ0STATUS);
610 isp_reg_writel(isp, irqstatus, OMAP3_ISP_IOMEM_MAIN, ISP_IRQ0STATUS);
614 if (irqstatus & IRQ0STATUS_CSIA_IRQ)
615 omap3isp_csi2_isr(&isp->isp_csi2a);
617 if (irqstatus & IRQ0STATUS_CSIB_IRQ)
618 omap3isp_ccp2_isr(&isp->isp_ccp2);
620 if (irqstatus & IRQ0STATUS_CCDC_VD0_IRQ) {
621 if (isp->isp_ccdc.output & CCDC_OUTPUT_PREVIEW)
622 omap3isp_preview_isr_frame_sync(&isp->isp_prev);
623 if (isp->isp_ccdc.output & CCDC_OUTPUT_RESIZER)
624 omap3isp_resizer_isr_frame_sync(&isp->isp_res);
625 omap3isp_stat_isr_frame_sync(&isp->isp_aewb);
626 omap3isp_stat_isr_frame_sync(&isp->isp_af);
627 omap3isp_stat_isr_frame_sync(&isp->isp_hist);
630 if (irqstatus & ccdc_events)
631 omap3isp_ccdc_isr(&isp->isp_ccdc, irqstatus & ccdc_events);
633 if (irqstatus & IRQ0STATUS_PRV_DONE_IRQ) {
634 if (isp->isp_prev.output & PREVIEW_OUTPUT_RESIZER)
635 omap3isp_resizer_isr_frame_sync(&isp->isp_res);
636 omap3isp_preview_isr(&isp->isp_prev);
639 if (irqstatus & IRQ0STATUS_RSZ_DONE_IRQ)
640 omap3isp_resizer_isr(&isp->isp_res);
642 if (irqstatus & IRQ0STATUS_H3A_AWB_DONE_IRQ)
643 omap3isp_stat_isr(&isp->isp_aewb);
645 if (irqstatus & IRQ0STATUS_H3A_AF_DONE_IRQ)
646 omap3isp_stat_isr(&isp->isp_af);
648 if (irqstatus & IRQ0STATUS_HIST_DONE_IRQ)
649 omap3isp_stat_isr(&isp->isp_hist);
653 #if defined(DEBUG) && defined(ISP_ISR_DEBUG)
654 isp_isr_dbg(isp, irqstatus);
660 static const struct media_device_ops isp_media_ops = {
661 .link_notify = v4l2_pipeline_link_notify,
664 /* -----------------------------------------------------------------------------
665 * Pipeline stream management
669 * isp_pipeline_enable - Enable streaming on a pipeline
670 * @pipe: ISP pipeline
671 * @mode: Stream mode (single shot or continuous)
673 * Walk the entities chain starting at the pipeline output video node and start
674 * all modules in the chain in the given mode.
676 * Return 0 if successful, or the return value of the failed video::s_stream
677 * operation otherwise.
679 static int isp_pipeline_enable(struct isp_pipeline *pipe,
680 enum isp_pipeline_stream_state mode)
682 struct isp_device *isp = pipe->output->isp;
683 struct media_entity *entity;
684 struct media_pad *pad;
685 struct v4l2_subdev *subdev;
689 /* Refuse to start streaming if an entity included in the pipeline has
690 * crashed. This check must be performed before the loop below to avoid
691 * starting entities if the pipeline won't start anyway (those entities
692 * would then likely fail to stop, making the problem worse).
694 if (media_entity_enum_intersects(&pipe->ent_enum, &isp->crashed))
697 spin_lock_irqsave(&pipe->lock, flags);
698 pipe->state &= ~(ISP_PIPELINE_IDLE_INPUT | ISP_PIPELINE_IDLE_OUTPUT);
699 spin_unlock_irqrestore(&pipe->lock, flags);
701 pipe->do_propagation = false;
703 entity = &pipe->output->video.entity;
705 pad = &entity->pads[0];
706 if (!(pad->flags & MEDIA_PAD_FL_SINK))
709 pad = media_entity_remote_pad(pad);
710 if (!pad || !is_media_entity_v4l2_subdev(pad->entity))
713 entity = pad->entity;
714 subdev = media_entity_to_v4l2_subdev(entity);
716 ret = v4l2_subdev_call(subdev, video, s_stream, mode);
717 if (ret < 0 && ret != -ENOIOCTLCMD)
720 if (subdev == &isp->isp_ccdc.subdev) {
721 v4l2_subdev_call(&isp->isp_aewb.subdev, video,
723 v4l2_subdev_call(&isp->isp_af.subdev, video,
725 v4l2_subdev_call(&isp->isp_hist.subdev, video,
727 pipe->do_propagation = true;
730 /* Stop at the first external sub-device. */
731 if (subdev->dev != isp->dev)
738 static int isp_pipeline_wait_resizer(struct isp_device *isp)
740 return omap3isp_resizer_busy(&isp->isp_res);
743 static int isp_pipeline_wait_preview(struct isp_device *isp)
745 return omap3isp_preview_busy(&isp->isp_prev);
748 static int isp_pipeline_wait_ccdc(struct isp_device *isp)
750 return omap3isp_stat_busy(&isp->isp_af)
751 || omap3isp_stat_busy(&isp->isp_aewb)
752 || omap3isp_stat_busy(&isp->isp_hist)
753 || omap3isp_ccdc_busy(&isp->isp_ccdc);
756 #define ISP_STOP_TIMEOUT msecs_to_jiffies(1000)
758 static int isp_pipeline_wait(struct isp_device *isp,
759 int(*busy)(struct isp_device *isp))
761 unsigned long timeout = jiffies + ISP_STOP_TIMEOUT;
763 while (!time_after(jiffies, timeout)) {
772 * isp_pipeline_disable - Disable streaming on a pipeline
773 * @pipe: ISP pipeline
775 * Walk the entities chain starting at the pipeline output video node and stop
776 * all modules in the chain. Wait synchronously for the modules to be stopped if
779 * Return 0 if all modules have been properly stopped, or -ETIMEDOUT if a module
780 * can't be stopped (in which case a software reset of the ISP is probably
783 static int isp_pipeline_disable(struct isp_pipeline *pipe)
785 struct isp_device *isp = pipe->output->isp;
786 struct media_entity *entity;
787 struct media_pad *pad;
788 struct v4l2_subdev *subdev;
793 * We need to stop all the modules after CCDC first or they'll
794 * never stop since they may not get a full frame from CCDC.
796 entity = &pipe->output->video.entity;
798 pad = &entity->pads[0];
799 if (!(pad->flags & MEDIA_PAD_FL_SINK))
802 pad = media_entity_remote_pad(pad);
803 if (!pad || !is_media_entity_v4l2_subdev(pad->entity))
806 entity = pad->entity;
807 subdev = media_entity_to_v4l2_subdev(entity);
809 if (subdev == &isp->isp_ccdc.subdev) {
810 v4l2_subdev_call(&isp->isp_aewb.subdev,
812 v4l2_subdev_call(&isp->isp_af.subdev,
814 v4l2_subdev_call(&isp->isp_hist.subdev,
818 ret = v4l2_subdev_call(subdev, video, s_stream, 0);
820 if (subdev == &isp->isp_res.subdev)
821 ret |= isp_pipeline_wait(isp, isp_pipeline_wait_resizer);
822 else if (subdev == &isp->isp_prev.subdev)
823 ret |= isp_pipeline_wait(isp, isp_pipeline_wait_preview);
824 else if (subdev == &isp->isp_ccdc.subdev)
825 ret |= isp_pipeline_wait(isp, isp_pipeline_wait_ccdc);
827 /* Handle stop failures. An entity that fails to stop can
828 * usually just be restarted. Flag the stop failure nonetheless
829 * to trigger an ISP reset the next time the device is released,
832 * The preview engine is a special case. A failure to stop can
833 * mean a hardware crash. When that happens the preview engine
834 * won't respond to read/write operations on the L4 bus anymore,
835 * resulting in a bus fault and a kernel oops next time it gets
836 * accessed. Mark it as crashed to prevent pipelines including
837 * it from being started.
840 dev_info(isp->dev, "Unable to stop %s\n", subdev->name);
841 isp->stop_failure = true;
842 if (subdev == &isp->isp_prev.subdev)
843 media_entity_enum_set(&isp->crashed,
845 failure = -ETIMEDOUT;
848 /* Stop at the first external sub-device. */
849 if (subdev->dev != isp->dev)
857 * omap3isp_pipeline_set_stream - Enable/disable streaming on a pipeline
858 * @pipe: ISP pipeline
859 * @state: Stream state (stopped, single shot or continuous)
861 * Set the pipeline to the given stream state. Pipelines can be started in
862 * single-shot or continuous mode.
864 * Return 0 if successful, or the return value of the failed video::s_stream
865 * operation otherwise. The pipeline state is not updated when the operation
866 * fails, except when stopping the pipeline.
868 int omap3isp_pipeline_set_stream(struct isp_pipeline *pipe,
869 enum isp_pipeline_stream_state state)
873 if (state == ISP_PIPELINE_STREAM_STOPPED)
874 ret = isp_pipeline_disable(pipe);
876 ret = isp_pipeline_enable(pipe, state);
878 if (ret == 0 || state == ISP_PIPELINE_STREAM_STOPPED)
879 pipe->stream_state = state;
885 * omap3isp_pipeline_cancel_stream - Cancel stream on a pipeline
886 * @pipe: ISP pipeline
888 * Cancelling a stream mark all buffers on all video nodes in the pipeline as
889 * erroneous and makes sure no new buffer can be queued. This function is called
890 * when a fatal error that prevents any further operation on the pipeline
893 void omap3isp_pipeline_cancel_stream(struct isp_pipeline *pipe)
896 omap3isp_video_cancel_stream(pipe->input);
898 omap3isp_video_cancel_stream(pipe->output);
902 * isp_pipeline_resume - Resume streaming on a pipeline
903 * @pipe: ISP pipeline
905 * Resume video output and input and re-enable pipeline.
907 static void isp_pipeline_resume(struct isp_pipeline *pipe)
909 int singleshot = pipe->stream_state == ISP_PIPELINE_STREAM_SINGLESHOT;
911 omap3isp_video_resume(pipe->output, !singleshot);
913 omap3isp_video_resume(pipe->input, 0);
914 isp_pipeline_enable(pipe, pipe->stream_state);
918 * isp_pipeline_suspend - Suspend streaming on a pipeline
919 * @pipe: ISP pipeline
923 static void isp_pipeline_suspend(struct isp_pipeline *pipe)
925 isp_pipeline_disable(pipe);
929 * isp_pipeline_is_last - Verify if entity has an enabled link to the output
931 * @me: ISP module's media entity
933 * Returns 1 if the entity has an enabled link to the output video node or 0
934 * otherwise. It's true only while pipeline can have no more than one output
937 static int isp_pipeline_is_last(struct media_entity *me)
939 struct isp_pipeline *pipe;
940 struct media_pad *pad;
944 pipe = to_isp_pipeline(me);
945 if (pipe->stream_state == ISP_PIPELINE_STREAM_STOPPED)
947 pad = media_entity_remote_pad(&pipe->output->pad);
948 return pad->entity == me;
952 * isp_suspend_module_pipeline - Suspend pipeline to which belongs the module
953 * @me: ISP module's media entity
955 * Suspend the whole pipeline if module's entity has an enabled link to the
956 * output video node. It works only while pipeline can have no more than one
959 static void isp_suspend_module_pipeline(struct media_entity *me)
961 if (isp_pipeline_is_last(me))
962 isp_pipeline_suspend(to_isp_pipeline(me));
966 * isp_resume_module_pipeline - Resume pipeline to which belongs the module
967 * @me: ISP module's media entity
969 * Resume the whole pipeline if module's entity has an enabled link to the
970 * output video node. It works only while pipeline can have no more than one
973 static void isp_resume_module_pipeline(struct media_entity *me)
975 if (isp_pipeline_is_last(me))
976 isp_pipeline_resume(to_isp_pipeline(me));
980 * isp_suspend_modules - Suspend ISP submodules.
981 * @isp: OMAP3 ISP device
983 * Returns 0 if suspend left in idle state all the submodules properly,
984 * or returns 1 if a general Reset is required to suspend the submodules.
986 static int isp_suspend_modules(struct isp_device *isp)
988 unsigned long timeout;
990 omap3isp_stat_suspend(&isp->isp_aewb);
991 omap3isp_stat_suspend(&isp->isp_af);
992 omap3isp_stat_suspend(&isp->isp_hist);
993 isp_suspend_module_pipeline(&isp->isp_res.subdev.entity);
994 isp_suspend_module_pipeline(&isp->isp_prev.subdev.entity);
995 isp_suspend_module_pipeline(&isp->isp_ccdc.subdev.entity);
996 isp_suspend_module_pipeline(&isp->isp_csi2a.subdev.entity);
997 isp_suspend_module_pipeline(&isp->isp_ccp2.subdev.entity);
999 timeout = jiffies + ISP_STOP_TIMEOUT;
1000 while (omap3isp_stat_busy(&isp->isp_af)
1001 || omap3isp_stat_busy(&isp->isp_aewb)
1002 || omap3isp_stat_busy(&isp->isp_hist)
1003 || omap3isp_preview_busy(&isp->isp_prev)
1004 || omap3isp_resizer_busy(&isp->isp_res)
1005 || omap3isp_ccdc_busy(&isp->isp_ccdc)) {
1006 if (time_after(jiffies, timeout)) {
1007 dev_info(isp->dev, "can't stop modules.\n");
1017 * isp_resume_modules - Resume ISP submodules.
1018 * @isp: OMAP3 ISP device
1020 static void isp_resume_modules(struct isp_device *isp)
1022 omap3isp_stat_resume(&isp->isp_aewb);
1023 omap3isp_stat_resume(&isp->isp_af);
1024 omap3isp_stat_resume(&isp->isp_hist);
1025 isp_resume_module_pipeline(&isp->isp_res.subdev.entity);
1026 isp_resume_module_pipeline(&isp->isp_prev.subdev.entity);
1027 isp_resume_module_pipeline(&isp->isp_ccdc.subdev.entity);
1028 isp_resume_module_pipeline(&isp->isp_csi2a.subdev.entity);
1029 isp_resume_module_pipeline(&isp->isp_ccp2.subdev.entity);
1033 * isp_reset - Reset ISP with a timeout wait for idle.
1034 * @isp: OMAP3 ISP device
1036 static int isp_reset(struct isp_device *isp)
1038 unsigned long timeout = 0;
1041 isp_reg_readl(isp, OMAP3_ISP_IOMEM_MAIN, ISP_SYSCONFIG)
1042 | ISP_SYSCONFIG_SOFTRESET,
1043 OMAP3_ISP_IOMEM_MAIN, ISP_SYSCONFIG);
1044 while (!(isp_reg_readl(isp, OMAP3_ISP_IOMEM_MAIN,
1045 ISP_SYSSTATUS) & 0x1)) {
1046 if (timeout++ > 10000) {
1047 dev_alert(isp->dev, "cannot reset ISP\n");
1053 isp->stop_failure = false;
1054 media_entity_enum_zero(&isp->crashed);
1059 * isp_save_context - Saves the values of the ISP module registers.
1060 * @isp: OMAP3 ISP device
1061 * @reg_list: Structure containing pairs of register address and value to
1065 isp_save_context(struct isp_device *isp, struct isp_reg *reg_list)
1067 struct isp_reg *next = reg_list;
1069 for (; next->reg != ISP_TOK_TERM; next++)
1070 next->val = isp_reg_readl(isp, next->mmio_range, next->reg);
1074 * isp_restore_context - Restores the values of the ISP module registers.
1075 * @isp: OMAP3 ISP device
1076 * @reg_list: Structure containing pairs of register address and value to
1080 isp_restore_context(struct isp_device *isp, struct isp_reg *reg_list)
1082 struct isp_reg *next = reg_list;
1084 for (; next->reg != ISP_TOK_TERM; next++)
1085 isp_reg_writel(isp, next->val, next->mmio_range, next->reg);
1089 * isp_save_ctx - Saves ISP, CCDC, HIST, H3A, PREV, RESZ & MMU context.
1090 * @isp: OMAP3 ISP device
1092 * Routine for saving the context of each module in the ISP.
1093 * CCDC, HIST, H3A, PREV, RESZ and MMU.
1095 static void isp_save_ctx(struct isp_device *isp)
1097 isp_save_context(isp, isp_reg_list);
1098 omap_iommu_save_ctx(isp->dev);
1102 * isp_restore_ctx - Restores ISP, CCDC, HIST, H3A, PREV, RESZ & MMU context.
1103 * @isp: OMAP3 ISP device
1105 * Routine for restoring the context of each module in the ISP.
1106 * CCDC, HIST, H3A, PREV, RESZ and MMU.
1108 static void isp_restore_ctx(struct isp_device *isp)
1110 isp_restore_context(isp, isp_reg_list);
1111 omap_iommu_restore_ctx(isp->dev);
1112 omap3isp_ccdc_restore_context(isp);
1113 omap3isp_preview_restore_context(isp);
1116 /* -----------------------------------------------------------------------------
1117 * SBL resources management
1119 #define OMAP3_ISP_SBL_READ (OMAP3_ISP_SBL_CSI1_READ | \
1120 OMAP3_ISP_SBL_CCDC_LSC_READ | \
1121 OMAP3_ISP_SBL_PREVIEW_READ | \
1122 OMAP3_ISP_SBL_RESIZER_READ)
1123 #define OMAP3_ISP_SBL_WRITE (OMAP3_ISP_SBL_CSI1_WRITE | \
1124 OMAP3_ISP_SBL_CSI2A_WRITE | \
1125 OMAP3_ISP_SBL_CSI2C_WRITE | \
1126 OMAP3_ISP_SBL_CCDC_WRITE | \
1127 OMAP3_ISP_SBL_PREVIEW_WRITE)
1129 void omap3isp_sbl_enable(struct isp_device *isp, enum isp_sbl_resource res)
1133 isp->sbl_resources |= res;
1135 if (isp->sbl_resources & OMAP3_ISP_SBL_CSI1_READ)
1136 sbl |= ISPCTRL_SBL_SHARED_RPORTA;
1138 if (isp->sbl_resources & OMAP3_ISP_SBL_CCDC_LSC_READ)
1139 sbl |= ISPCTRL_SBL_SHARED_RPORTB;
1141 if (isp->sbl_resources & OMAP3_ISP_SBL_CSI2C_WRITE)
1142 sbl |= ISPCTRL_SBL_SHARED_WPORTC;
1144 if (isp->sbl_resources & OMAP3_ISP_SBL_RESIZER_WRITE)
1145 sbl |= ISPCTRL_SBL_WR0_RAM_EN;
1147 if (isp->sbl_resources & OMAP3_ISP_SBL_WRITE)
1148 sbl |= ISPCTRL_SBL_WR1_RAM_EN;
1150 if (isp->sbl_resources & OMAP3_ISP_SBL_READ)
1151 sbl |= ISPCTRL_SBL_RD_RAM_EN;
1153 isp_reg_set(isp, OMAP3_ISP_IOMEM_MAIN, ISP_CTRL, sbl);
1156 void omap3isp_sbl_disable(struct isp_device *isp, enum isp_sbl_resource res)
1160 isp->sbl_resources &= ~res;
1162 if (!(isp->sbl_resources & OMAP3_ISP_SBL_CSI1_READ))
1163 sbl |= ISPCTRL_SBL_SHARED_RPORTA;
1165 if (!(isp->sbl_resources & OMAP3_ISP_SBL_CCDC_LSC_READ))
1166 sbl |= ISPCTRL_SBL_SHARED_RPORTB;
1168 if (!(isp->sbl_resources & OMAP3_ISP_SBL_CSI2C_WRITE))
1169 sbl |= ISPCTRL_SBL_SHARED_WPORTC;
1171 if (!(isp->sbl_resources & OMAP3_ISP_SBL_RESIZER_WRITE))
1172 sbl |= ISPCTRL_SBL_WR0_RAM_EN;
1174 if (!(isp->sbl_resources & OMAP3_ISP_SBL_WRITE))
1175 sbl |= ISPCTRL_SBL_WR1_RAM_EN;
1177 if (!(isp->sbl_resources & OMAP3_ISP_SBL_READ))
1178 sbl |= ISPCTRL_SBL_RD_RAM_EN;
1180 isp_reg_clr(isp, OMAP3_ISP_IOMEM_MAIN, ISP_CTRL, sbl);
1184 * isp_module_sync_idle - Helper to sync module with its idle state
1185 * @me: ISP submodule's media entity
1186 * @wait: ISP submodule's wait queue for streamoff/interrupt synchronization
1187 * @stopping: flag which tells module wants to stop
1189 * This function checks if ISP submodule needs to wait for next interrupt. If
1190 * yes, makes the caller to sleep while waiting for such event.
1192 int omap3isp_module_sync_idle(struct media_entity *me, wait_queue_head_t *wait,
1195 struct isp_pipeline *pipe = to_isp_pipeline(me);
1197 if (pipe->stream_state == ISP_PIPELINE_STREAM_STOPPED ||
1198 (pipe->stream_state == ISP_PIPELINE_STREAM_SINGLESHOT &&
1199 !isp_pipeline_ready(pipe)))
1203 * atomic_set() doesn't include memory barrier on ARM platform for SMP
1204 * scenario. We'll call it here to avoid race conditions.
1206 atomic_set(stopping, 1);
1210 * If module is the last one, it's writing to memory. In this case,
1211 * it's necessary to check if the module is already paused due to
1212 * DMA queue underrun or if it has to wait for next interrupt to be
1214 * If it isn't the last one, the function won't sleep but *stopping
1215 * will still be set to warn next submodule caller's interrupt the
1216 * module wants to be idle.
1218 if (isp_pipeline_is_last(me)) {
1219 struct isp_video *video = pipe->output;
1220 unsigned long flags;
1221 spin_lock_irqsave(&video->irqlock, flags);
1222 if (video->dmaqueue_flags & ISP_VIDEO_DMAQUEUE_UNDERRUN) {
1223 spin_unlock_irqrestore(&video->irqlock, flags);
1224 atomic_set(stopping, 0);
1228 spin_unlock_irqrestore(&video->irqlock, flags);
1229 if (!wait_event_timeout(*wait, !atomic_read(stopping),
1230 msecs_to_jiffies(1000))) {
1231 atomic_set(stopping, 0);
1241 * omap3isp_module_sync_is_stopping - Helper to verify if module was stopping
1242 * @wait: ISP submodule's wait queue for streamoff/interrupt synchronization
1243 * @stopping: flag which tells module wants to stop
1245 * This function checks if ISP submodule was stopping. In case of yes, it
1246 * notices the caller by setting stopping to 0 and waking up the wait queue.
1247 * Returns 1 if it was stopping or 0 otherwise.
1249 int omap3isp_module_sync_is_stopping(wait_queue_head_t *wait,
1252 if (atomic_cmpxchg(stopping, 1, 0)) {
1260 /* --------------------------------------------------------------------------
1264 #define ISPCTRL_CLKS_MASK (ISPCTRL_H3A_CLK_EN | \
1265 ISPCTRL_HIST_CLK_EN | \
1266 ISPCTRL_RSZ_CLK_EN | \
1267 (ISPCTRL_CCDC_CLK_EN | ISPCTRL_CCDC_RAM_EN) | \
1268 (ISPCTRL_PREV_CLK_EN | ISPCTRL_PREV_RAM_EN))
1270 static void __isp_subclk_update(struct isp_device *isp)
1274 /* AEWB and AF share the same clock. */
1275 if (isp->subclk_resources &
1276 (OMAP3_ISP_SUBCLK_AEWB | OMAP3_ISP_SUBCLK_AF))
1277 clk |= ISPCTRL_H3A_CLK_EN;
1279 if (isp->subclk_resources & OMAP3_ISP_SUBCLK_HIST)
1280 clk |= ISPCTRL_HIST_CLK_EN;
1282 if (isp->subclk_resources & OMAP3_ISP_SUBCLK_RESIZER)
1283 clk |= ISPCTRL_RSZ_CLK_EN;
1285 /* NOTE: For CCDC & Preview submodules, we need to affect internal
1288 if (isp->subclk_resources & OMAP3_ISP_SUBCLK_CCDC)
1289 clk |= ISPCTRL_CCDC_CLK_EN | ISPCTRL_CCDC_RAM_EN;
1291 if (isp->subclk_resources & OMAP3_ISP_SUBCLK_PREVIEW)
1292 clk |= ISPCTRL_PREV_CLK_EN | ISPCTRL_PREV_RAM_EN;
1294 isp_reg_clr_set(isp, OMAP3_ISP_IOMEM_MAIN, ISP_CTRL,
1295 ISPCTRL_CLKS_MASK, clk);
1298 void omap3isp_subclk_enable(struct isp_device *isp,
1299 enum isp_subclk_resource res)
1301 isp->subclk_resources |= res;
1303 __isp_subclk_update(isp);
1306 void omap3isp_subclk_disable(struct isp_device *isp,
1307 enum isp_subclk_resource res)
1309 isp->subclk_resources &= ~res;
1311 __isp_subclk_update(isp);
1315 * isp_enable_clocks - Enable ISP clocks
1316 * @isp: OMAP3 ISP device
1318 * Return 0 if successful, or clk_prepare_enable return value if any of them
1321 static int isp_enable_clocks(struct isp_device *isp)
1326 r = clk_prepare_enable(isp->clock[ISP_CLK_CAM_ICK]);
1328 dev_err(isp->dev, "failed to enable cam_ick clock\n");
1329 goto out_clk_enable_ick;
1331 r = clk_set_rate(isp->clock[ISP_CLK_CAM_MCLK], CM_CAM_MCLK_HZ);
1333 dev_err(isp->dev, "clk_set_rate for cam_mclk failed\n");
1334 goto out_clk_enable_mclk;
1336 r = clk_prepare_enable(isp->clock[ISP_CLK_CAM_MCLK]);
1338 dev_err(isp->dev, "failed to enable cam_mclk clock\n");
1339 goto out_clk_enable_mclk;
1341 rate = clk_get_rate(isp->clock[ISP_CLK_CAM_MCLK]);
1342 if (rate != CM_CAM_MCLK_HZ)
1343 dev_warn(isp->dev, "unexpected cam_mclk rate:\n"
1345 " actual : %ld\n", CM_CAM_MCLK_HZ, rate);
1346 r = clk_prepare_enable(isp->clock[ISP_CLK_CSI2_FCK]);
1348 dev_err(isp->dev, "failed to enable csi2_fck clock\n");
1349 goto out_clk_enable_csi2_fclk;
1353 out_clk_enable_csi2_fclk:
1354 clk_disable_unprepare(isp->clock[ISP_CLK_CAM_MCLK]);
1355 out_clk_enable_mclk:
1356 clk_disable_unprepare(isp->clock[ISP_CLK_CAM_ICK]);
1362 * isp_disable_clocks - Disable ISP clocks
1363 * @isp: OMAP3 ISP device
1365 static void isp_disable_clocks(struct isp_device *isp)
1367 clk_disable_unprepare(isp->clock[ISP_CLK_CAM_ICK]);
1368 clk_disable_unprepare(isp->clock[ISP_CLK_CAM_MCLK]);
1369 clk_disable_unprepare(isp->clock[ISP_CLK_CSI2_FCK]);
1372 static const char *isp_clocks[] = {
1379 static int isp_get_clocks(struct isp_device *isp)
1384 for (i = 0; i < ARRAY_SIZE(isp_clocks); ++i) {
1385 clk = devm_clk_get(isp->dev, isp_clocks[i]);
1387 dev_err(isp->dev, "clk_get %s failed\n", isp_clocks[i]);
1388 return PTR_ERR(clk);
1391 isp->clock[i] = clk;
1398 * omap3isp_get - Acquire the ISP resource.
1400 * Initializes the clocks for the first acquire.
1402 * Increment the reference count on the ISP. If the first reference is taken,
1403 * enable clocks and power-up all submodules.
1405 * Return a pointer to the ISP device structure, or NULL if an error occurred.
1407 static struct isp_device *__omap3isp_get(struct isp_device *isp, bool irq)
1409 struct isp_device *__isp = isp;
1414 mutex_lock(&isp->isp_mutex);
1415 if (isp->ref_count > 0)
1418 if (isp_enable_clocks(isp) < 0) {
1423 /* We don't want to restore context before saving it! */
1424 if (isp->has_context)
1425 isp_restore_ctx(isp);
1428 isp_enable_interrupts(isp);
1433 mutex_unlock(&isp->isp_mutex);
1438 struct isp_device *omap3isp_get(struct isp_device *isp)
1440 return __omap3isp_get(isp, true);
1444 * omap3isp_put - Release the ISP
1446 * Decrement the reference count on the ISP. If the last reference is released,
1447 * power-down all submodules, disable clocks and free temporary buffers.
1449 static void __omap3isp_put(struct isp_device *isp, bool save_ctx)
1454 mutex_lock(&isp->isp_mutex);
1455 BUG_ON(isp->ref_count == 0);
1456 if (--isp->ref_count == 0) {
1457 isp_disable_interrupts(isp);
1460 isp->has_context = 1;
1462 /* Reset the ISP if an entity has failed to stop. This is the
1463 * only way to recover from such conditions.
1465 if (!media_entity_enum_empty(&isp->crashed) ||
1468 isp_disable_clocks(isp);
1470 mutex_unlock(&isp->isp_mutex);
1473 void omap3isp_put(struct isp_device *isp)
1475 __omap3isp_put(isp, true);
1478 /* --------------------------------------------------------------------------
1479 * Platform device driver
1483 * omap3isp_print_status - Prints the values of the ISP Control Module registers
1484 * @isp: OMAP3 ISP device
1486 #define ISP_PRINT_REGISTER(isp, name)\
1487 dev_dbg(isp->dev, "###ISP " #name "=0x%08x\n", \
1488 isp_reg_readl(isp, OMAP3_ISP_IOMEM_MAIN, ISP_##name))
1489 #define SBL_PRINT_REGISTER(isp, name)\
1490 dev_dbg(isp->dev, "###SBL " #name "=0x%08x\n", \
1491 isp_reg_readl(isp, OMAP3_ISP_IOMEM_SBL, ISPSBL_##name))
1493 void omap3isp_print_status(struct isp_device *isp)
1495 dev_dbg(isp->dev, "-------------ISP Register dump--------------\n");
1497 ISP_PRINT_REGISTER(isp, SYSCONFIG);
1498 ISP_PRINT_REGISTER(isp, SYSSTATUS);
1499 ISP_PRINT_REGISTER(isp, IRQ0ENABLE);
1500 ISP_PRINT_REGISTER(isp, IRQ0STATUS);
1501 ISP_PRINT_REGISTER(isp, TCTRL_GRESET_LENGTH);
1502 ISP_PRINT_REGISTER(isp, TCTRL_PSTRB_REPLAY);
1503 ISP_PRINT_REGISTER(isp, CTRL);
1504 ISP_PRINT_REGISTER(isp, TCTRL_CTRL);
1505 ISP_PRINT_REGISTER(isp, TCTRL_FRAME);
1506 ISP_PRINT_REGISTER(isp, TCTRL_PSTRB_DELAY);
1507 ISP_PRINT_REGISTER(isp, TCTRL_STRB_DELAY);
1508 ISP_PRINT_REGISTER(isp, TCTRL_SHUT_DELAY);
1509 ISP_PRINT_REGISTER(isp, TCTRL_PSTRB_LENGTH);
1510 ISP_PRINT_REGISTER(isp, TCTRL_STRB_LENGTH);
1511 ISP_PRINT_REGISTER(isp, TCTRL_SHUT_LENGTH);
1513 SBL_PRINT_REGISTER(isp, PCR);
1514 SBL_PRINT_REGISTER(isp, SDR_REQ_EXP);
1516 dev_dbg(isp->dev, "--------------------------------------------\n");
1522 * Power management support.
1524 * As the ISP can't properly handle an input video stream interruption on a non
1525 * frame boundary, the ISP pipelines need to be stopped before sensors get
1526 * suspended. However, as suspending the sensors can require a running clock,
1527 * which can be provided by the ISP, the ISP can't be completely suspended
1528 * before the sensor.
1530 * To solve this problem power management support is split into prepare/complete
1531 * and suspend/resume operations. The pipelines are stopped in prepare() and the
1532 * ISP clocks get disabled in suspend(). Similarly, the clocks are reenabled in
1533 * resume(), and the the pipelines are restarted in complete().
1535 * TODO: PM dependencies between the ISP and sensors are not modelled explicitly
1538 static int isp_pm_prepare(struct device *dev)
1540 struct isp_device *isp = dev_get_drvdata(dev);
1543 WARN_ON(mutex_is_locked(&isp->isp_mutex));
1545 if (isp->ref_count == 0)
1548 reset = isp_suspend_modules(isp);
1549 isp_disable_interrupts(isp);
1557 static int isp_pm_suspend(struct device *dev)
1559 struct isp_device *isp = dev_get_drvdata(dev);
1561 WARN_ON(mutex_is_locked(&isp->isp_mutex));
1564 isp_disable_clocks(isp);
1569 static int isp_pm_resume(struct device *dev)
1571 struct isp_device *isp = dev_get_drvdata(dev);
1573 if (isp->ref_count == 0)
1576 return isp_enable_clocks(isp);
1579 static void isp_pm_complete(struct device *dev)
1581 struct isp_device *isp = dev_get_drvdata(dev);
1583 if (isp->ref_count == 0)
1586 isp_restore_ctx(isp);
1587 isp_enable_interrupts(isp);
1588 isp_resume_modules(isp);
1593 #define isp_pm_prepare NULL
1594 #define isp_pm_suspend NULL
1595 #define isp_pm_resume NULL
1596 #define isp_pm_complete NULL
1598 #endif /* CONFIG_PM */
1600 static void isp_unregister_entities(struct isp_device *isp)
1602 media_device_unregister(&isp->media_dev);
1604 omap3isp_csi2_unregister_entities(&isp->isp_csi2a);
1605 omap3isp_ccp2_unregister_entities(&isp->isp_ccp2);
1606 omap3isp_ccdc_unregister_entities(&isp->isp_ccdc);
1607 omap3isp_preview_unregister_entities(&isp->isp_prev);
1608 omap3isp_resizer_unregister_entities(&isp->isp_res);
1609 omap3isp_stat_unregister_entities(&isp->isp_aewb);
1610 omap3isp_stat_unregister_entities(&isp->isp_af);
1611 omap3isp_stat_unregister_entities(&isp->isp_hist);
1613 v4l2_device_unregister(&isp->v4l2_dev);
1614 media_device_cleanup(&isp->media_dev);
1617 static int isp_link_entity(
1618 struct isp_device *isp, struct media_entity *entity,
1619 enum isp_interface_type interface)
1621 struct media_entity *input;
1626 /* Connect the sensor to the correct interface module.
1627 * Parallel sensors are connected directly to the CCDC, while
1628 * serial sensors are connected to the CSI2a, CCP2b or CSI2c
1629 * receiver through CSIPHY1 or CSIPHY2.
1631 switch (interface) {
1632 case ISP_INTERFACE_PARALLEL:
1633 input = &isp->isp_ccdc.subdev.entity;
1634 pad = CCDC_PAD_SINK;
1638 case ISP_INTERFACE_CSI2A_PHY2:
1639 input = &isp->isp_csi2a.subdev.entity;
1640 pad = CSI2_PAD_SINK;
1641 flags = MEDIA_LNK_FL_IMMUTABLE | MEDIA_LNK_FL_ENABLED;
1644 case ISP_INTERFACE_CCP2B_PHY1:
1645 case ISP_INTERFACE_CCP2B_PHY2:
1646 input = &isp->isp_ccp2.subdev.entity;
1647 pad = CCP2_PAD_SINK;
1651 case ISP_INTERFACE_CSI2C_PHY1:
1652 input = &isp->isp_csi2c.subdev.entity;
1653 pad = CSI2_PAD_SINK;
1654 flags = MEDIA_LNK_FL_IMMUTABLE | MEDIA_LNK_FL_ENABLED;
1658 dev_err(isp->dev, "%s: invalid interface type %u\n", __func__,
1664 * Not all interfaces are available on all revisions of the
1665 * ISP. The sub-devices of those interfaces aren't initialised
1666 * in such a case. Check this by ensuring the num_pads is
1669 if (!input->num_pads) {
1670 dev_err(isp->dev, "%s: invalid input %u\n", entity->name,
1675 for (i = 0; i < entity->num_pads; i++) {
1676 if (entity->pads[i].flags & MEDIA_PAD_FL_SOURCE)
1679 if (i == entity->num_pads) {
1680 dev_err(isp->dev, "%s: no source pad in external entity\n",
1685 return media_create_pad_link(entity, i, input, pad, flags);
1688 static int isp_register_entities(struct isp_device *isp)
1692 isp->media_dev.dev = isp->dev;
1693 strlcpy(isp->media_dev.model, "TI OMAP3 ISP",
1694 sizeof(isp->media_dev.model));
1695 isp->media_dev.hw_revision = isp->revision;
1696 isp->media_dev.ops = &isp_media_ops;
1697 media_device_init(&isp->media_dev);
1699 isp->v4l2_dev.mdev = &isp->media_dev;
1700 ret = v4l2_device_register(isp->dev, &isp->v4l2_dev);
1702 dev_err(isp->dev, "%s: V4L2 device registration failed (%d)\n",
1707 /* Register internal entities */
1708 ret = omap3isp_ccp2_register_entities(&isp->isp_ccp2, &isp->v4l2_dev);
1712 ret = omap3isp_csi2_register_entities(&isp->isp_csi2a, &isp->v4l2_dev);
1716 ret = omap3isp_ccdc_register_entities(&isp->isp_ccdc, &isp->v4l2_dev);
1720 ret = omap3isp_preview_register_entities(&isp->isp_prev,
1725 ret = omap3isp_resizer_register_entities(&isp->isp_res, &isp->v4l2_dev);
1729 ret = omap3isp_stat_register_entities(&isp->isp_aewb, &isp->v4l2_dev);
1733 ret = omap3isp_stat_register_entities(&isp->isp_af, &isp->v4l2_dev);
1737 ret = omap3isp_stat_register_entities(&isp->isp_hist, &isp->v4l2_dev);
1743 isp_unregister_entities(isp);
1749 * isp_create_links() - Create links for internal and external ISP entities
1750 * @isp : Pointer to ISP device
1752 * This function creates all links between ISP internal and external entities.
1754 * Return: A negative error code on failure or zero on success. Possible error
1755 * codes are those returned by media_create_pad_link().
1757 static int isp_create_links(struct isp_device *isp)
1761 /* Create links between entities and video nodes. */
1762 ret = media_create_pad_link(
1763 &isp->isp_csi2a.subdev.entity, CSI2_PAD_SOURCE,
1764 &isp->isp_csi2a.video_out.video.entity, 0, 0);
1768 ret = media_create_pad_link(
1769 &isp->isp_ccp2.video_in.video.entity, 0,
1770 &isp->isp_ccp2.subdev.entity, CCP2_PAD_SINK, 0);
1774 ret = media_create_pad_link(
1775 &isp->isp_ccdc.subdev.entity, CCDC_PAD_SOURCE_OF,
1776 &isp->isp_ccdc.video_out.video.entity, 0, 0);
1780 ret = media_create_pad_link(
1781 &isp->isp_prev.video_in.video.entity, 0,
1782 &isp->isp_prev.subdev.entity, PREV_PAD_SINK, 0);
1786 ret = media_create_pad_link(
1787 &isp->isp_prev.subdev.entity, PREV_PAD_SOURCE,
1788 &isp->isp_prev.video_out.video.entity, 0, 0);
1792 ret = media_create_pad_link(
1793 &isp->isp_res.video_in.video.entity, 0,
1794 &isp->isp_res.subdev.entity, RESZ_PAD_SINK, 0);
1798 ret = media_create_pad_link(
1799 &isp->isp_res.subdev.entity, RESZ_PAD_SOURCE,
1800 &isp->isp_res.video_out.video.entity, 0, 0);
1805 /* Create links between entities. */
1806 ret = media_create_pad_link(
1807 &isp->isp_csi2a.subdev.entity, CSI2_PAD_SOURCE,
1808 &isp->isp_ccdc.subdev.entity, CCDC_PAD_SINK, 0);
1812 ret = media_create_pad_link(
1813 &isp->isp_ccp2.subdev.entity, CCP2_PAD_SOURCE,
1814 &isp->isp_ccdc.subdev.entity, CCDC_PAD_SINK, 0);
1818 ret = media_create_pad_link(
1819 &isp->isp_ccdc.subdev.entity, CCDC_PAD_SOURCE_VP,
1820 &isp->isp_prev.subdev.entity, PREV_PAD_SINK, 0);
1824 ret = media_create_pad_link(
1825 &isp->isp_ccdc.subdev.entity, CCDC_PAD_SOURCE_OF,
1826 &isp->isp_res.subdev.entity, RESZ_PAD_SINK, 0);
1830 ret = media_create_pad_link(
1831 &isp->isp_prev.subdev.entity, PREV_PAD_SOURCE,
1832 &isp->isp_res.subdev.entity, RESZ_PAD_SINK, 0);
1836 ret = media_create_pad_link(
1837 &isp->isp_ccdc.subdev.entity, CCDC_PAD_SOURCE_VP,
1838 &isp->isp_aewb.subdev.entity, 0,
1839 MEDIA_LNK_FL_ENABLED | MEDIA_LNK_FL_IMMUTABLE);
1843 ret = media_create_pad_link(
1844 &isp->isp_ccdc.subdev.entity, CCDC_PAD_SOURCE_VP,
1845 &isp->isp_af.subdev.entity, 0,
1846 MEDIA_LNK_FL_ENABLED | MEDIA_LNK_FL_IMMUTABLE);
1850 ret = media_create_pad_link(
1851 &isp->isp_ccdc.subdev.entity, CCDC_PAD_SOURCE_VP,
1852 &isp->isp_hist.subdev.entity, 0,
1853 MEDIA_LNK_FL_ENABLED | MEDIA_LNK_FL_IMMUTABLE);
1860 static void isp_cleanup_modules(struct isp_device *isp)
1862 omap3isp_h3a_aewb_cleanup(isp);
1863 omap3isp_h3a_af_cleanup(isp);
1864 omap3isp_hist_cleanup(isp);
1865 omap3isp_resizer_cleanup(isp);
1866 omap3isp_preview_cleanup(isp);
1867 omap3isp_ccdc_cleanup(isp);
1868 omap3isp_ccp2_cleanup(isp);
1869 omap3isp_csi2_cleanup(isp);
1872 static int isp_initialize_modules(struct isp_device *isp)
1876 ret = omap3isp_csiphy_init(isp);
1878 dev_err(isp->dev, "CSI PHY initialization failed\n");
1882 ret = omap3isp_csi2_init(isp);
1884 dev_err(isp->dev, "CSI2 initialization failed\n");
1888 ret = omap3isp_ccp2_init(isp);
1890 dev_err(isp->dev, "CCP2 initialization failed\n");
1894 ret = omap3isp_ccdc_init(isp);
1896 dev_err(isp->dev, "CCDC initialization failed\n");
1900 ret = omap3isp_preview_init(isp);
1902 dev_err(isp->dev, "Preview initialization failed\n");
1906 ret = omap3isp_resizer_init(isp);
1908 dev_err(isp->dev, "Resizer initialization failed\n");
1912 ret = omap3isp_hist_init(isp);
1914 dev_err(isp->dev, "Histogram initialization failed\n");
1918 ret = omap3isp_h3a_aewb_init(isp);
1920 dev_err(isp->dev, "H3A AEWB initialization failed\n");
1921 goto error_h3a_aewb;
1924 ret = omap3isp_h3a_af_init(isp);
1926 dev_err(isp->dev, "H3A AF initialization failed\n");
1933 omap3isp_h3a_aewb_cleanup(isp);
1935 omap3isp_hist_cleanup(isp);
1937 omap3isp_resizer_cleanup(isp);
1939 omap3isp_preview_cleanup(isp);
1941 omap3isp_ccdc_cleanup(isp);
1943 omap3isp_ccp2_cleanup(isp);
1945 omap3isp_csi2_cleanup(isp);
1951 static void isp_detach_iommu(struct isp_device *isp)
1953 arm_iommu_detach_device(isp->dev);
1954 arm_iommu_release_mapping(isp->mapping);
1955 isp->mapping = NULL;
1956 iommu_group_remove_device(isp->dev);
1959 static int isp_attach_iommu(struct isp_device *isp)
1961 struct dma_iommu_mapping *mapping;
1962 struct iommu_group *group;
1965 /* Create a device group and add the device to it. */
1966 group = iommu_group_alloc();
1967 if (IS_ERR(group)) {
1968 dev_err(isp->dev, "failed to allocate IOMMU group\n");
1969 return PTR_ERR(group);
1972 ret = iommu_group_add_device(group, isp->dev);
1973 iommu_group_put(group);
1976 dev_err(isp->dev, "failed to add device to IPMMU group\n");
1981 * Create the ARM mapping, used by the ARM DMA mapping core to allocate
1982 * VAs. This will allocate a corresponding IOMMU domain.
1984 mapping = arm_iommu_create_mapping(&platform_bus_type, SZ_1G, SZ_2G);
1985 if (IS_ERR(mapping)) {
1986 dev_err(isp->dev, "failed to create ARM IOMMU mapping\n");
1987 return PTR_ERR(mapping);
1990 isp->mapping = mapping;
1992 /* Attach the ARM VA mapping to the device. */
1993 ret = arm_iommu_attach_device(isp->dev, mapping);
1995 dev_err(isp->dev, "failed to attach device to VA mapping\n");
2002 arm_iommu_release_mapping(isp->mapping);
2003 isp->mapping = NULL;
2008 * isp_remove - Remove ISP platform device
2009 * @pdev: Pointer to ISP platform device
2013 static int isp_remove(struct platform_device *pdev)
2015 struct isp_device *isp = platform_get_drvdata(pdev);
2017 v4l2_async_notifier_unregister(&isp->notifier);
2018 isp_unregister_entities(isp);
2019 isp_cleanup_modules(isp);
2020 isp_xclk_cleanup(isp);
2022 __omap3isp_get(isp, false);
2023 isp_detach_iommu(isp);
2024 __omap3isp_put(isp, false);
2026 media_entity_enum_cleanup(&isp->crashed);
2032 ISP_OF_PHY_PARALLEL = 0,
2037 static int isp_of_parse_node(struct device *dev, struct device_node *node,
2038 struct isp_async_subdev *isd)
2040 struct isp_bus_cfg *buscfg = &isd->bus;
2041 struct v4l2_of_endpoint vep;
2045 ret = v4l2_of_parse_endpoint(node, &vep);
2049 dev_dbg(dev, "parsing endpoint %s, interface %u\n", node->full_name,
2052 switch (vep.base.port) {
2053 case ISP_OF_PHY_PARALLEL:
2054 buscfg->interface = ISP_INTERFACE_PARALLEL;
2055 buscfg->bus.parallel.data_lane_shift =
2056 vep.bus.parallel.data_shift;
2057 buscfg->bus.parallel.clk_pol =
2058 !!(vep.bus.parallel.flags
2059 & V4L2_MBUS_PCLK_SAMPLE_FALLING);
2060 buscfg->bus.parallel.hs_pol =
2061 !!(vep.bus.parallel.flags & V4L2_MBUS_VSYNC_ACTIVE_LOW);
2062 buscfg->bus.parallel.vs_pol =
2063 !!(vep.bus.parallel.flags & V4L2_MBUS_HSYNC_ACTIVE_LOW);
2064 buscfg->bus.parallel.fld_pol =
2065 !!(vep.bus.parallel.flags & V4L2_MBUS_FIELD_EVEN_LOW);
2066 buscfg->bus.parallel.data_pol =
2067 !!(vep.bus.parallel.flags & V4L2_MBUS_DATA_ACTIVE_LOW);
2070 case ISP_OF_PHY_CSIPHY1:
2071 case ISP_OF_PHY_CSIPHY2:
2072 /* FIXME: always assume CSI-2 for now. */
2073 switch (vep.base.port) {
2074 case ISP_OF_PHY_CSIPHY1:
2075 buscfg->interface = ISP_INTERFACE_CSI2C_PHY1;
2077 case ISP_OF_PHY_CSIPHY2:
2078 buscfg->interface = ISP_INTERFACE_CSI2A_PHY2;
2081 buscfg->bus.csi2.lanecfg.clk.pos = vep.bus.mipi_csi2.clock_lane;
2082 buscfg->bus.csi2.lanecfg.clk.pol =
2083 vep.bus.mipi_csi2.lane_polarities[0];
2084 dev_dbg(dev, "clock lane polarity %u, pos %u\n",
2085 buscfg->bus.csi2.lanecfg.clk.pol,
2086 buscfg->bus.csi2.lanecfg.clk.pos);
2088 for (i = 0; i < ISP_CSIPHY2_NUM_DATA_LANES; i++) {
2089 buscfg->bus.csi2.lanecfg.data[i].pos =
2090 vep.bus.mipi_csi2.data_lanes[i];
2091 buscfg->bus.csi2.lanecfg.data[i].pol =
2092 vep.bus.mipi_csi2.lane_polarities[i + 1];
2093 dev_dbg(dev, "data lane %u polarity %u, pos %u\n", i,
2094 buscfg->bus.csi2.lanecfg.data[i].pol,
2095 buscfg->bus.csi2.lanecfg.data[i].pos);
2099 * FIXME: now we assume the CRC is always there.
2100 * Implement a way to obtain this information from the
2101 * sensor. Frame descriptors, perhaps?
2103 buscfg->bus.csi2.crc = 1;
2107 dev_warn(dev, "%s: invalid interface %u\n", node->full_name,
2115 static int isp_of_parse_nodes(struct device *dev,
2116 struct v4l2_async_notifier *notifier)
2118 struct device_node *node = NULL;
2120 notifier->subdevs = devm_kcalloc(
2121 dev, ISP_MAX_SUBDEVS, sizeof(*notifier->subdevs), GFP_KERNEL);
2122 if (!notifier->subdevs)
2125 while (notifier->num_subdevs < ISP_MAX_SUBDEVS &&
2126 (node = of_graph_get_next_endpoint(dev->of_node, node))) {
2127 struct isp_async_subdev *isd;
2129 isd = devm_kzalloc(dev, sizeof(*isd), GFP_KERNEL);
2135 notifier->subdevs[notifier->num_subdevs] = &isd->asd;
2137 if (isp_of_parse_node(dev, node, isd)) {
2142 isd->asd.match.of.node = of_graph_get_remote_port_parent(node);
2144 if (!isd->asd.match.of.node) {
2145 dev_warn(dev, "bad remote port parent\n");
2149 isd->asd.match_type = V4L2_ASYNC_MATCH_OF;
2150 notifier->num_subdevs++;
2153 return notifier->num_subdevs;
2156 static int isp_subdev_notifier_bound(struct v4l2_async_notifier *async,
2157 struct v4l2_subdev *subdev,
2158 struct v4l2_async_subdev *asd)
2160 struct isp_async_subdev *isd =
2161 container_of(asd, struct isp_async_subdev, asd);
2164 isd->sd->host_priv = &isd->bus;
2169 static int isp_subdev_notifier_complete(struct v4l2_async_notifier *async)
2171 struct isp_device *isp = container_of(async, struct isp_device,
2173 struct v4l2_device *v4l2_dev = &isp->v4l2_dev;
2174 struct v4l2_subdev *sd;
2175 struct isp_bus_cfg *bus;
2178 ret = media_entity_enum_init(&isp->crashed, &isp->media_dev);
2182 list_for_each_entry(sd, &v4l2_dev->subdevs, list) {
2183 /* Only try to link entities whose interface was set on bound */
2184 if (sd->host_priv) {
2185 bus = (struct isp_bus_cfg *)sd->host_priv;
2186 ret = isp_link_entity(isp, &sd->entity, bus->interface);
2192 ret = v4l2_device_register_subdev_nodes(&isp->v4l2_dev);
2196 return media_device_register(&isp->media_dev);
2200 * isp_probe - Probe ISP platform device
2201 * @pdev: Pointer to ISP platform device
2203 * Returns 0 if successful,
2204 * -ENOMEM if no memory available,
2205 * -ENODEV if no platform device resources found
2206 * or no space for remapping registers,
2207 * -EINVAL if couldn't install ISR,
2208 * or clk_get return error value.
2210 static int isp_probe(struct platform_device *pdev)
2212 struct isp_device *isp;
2213 struct resource *mem;
2217 isp = devm_kzalloc(&pdev->dev, sizeof(*isp), GFP_KERNEL);
2219 dev_err(&pdev->dev, "could not allocate memory\n");
2223 ret = of_property_read_u32(pdev->dev.of_node, "ti,phy-type",
2228 isp->syscon = syscon_regmap_lookup_by_phandle(pdev->dev.of_node,
2230 if (IS_ERR(isp->syscon))
2231 return PTR_ERR(isp->syscon);
2233 ret = of_property_read_u32_index(pdev->dev.of_node, "syscon", 1,
2234 &isp->syscon_offset);
2238 ret = isp_of_parse_nodes(&pdev->dev, &isp->notifier);
2242 isp->autoidle = autoidle;
2244 mutex_init(&isp->isp_mutex);
2245 spin_lock_init(&isp->stat_lock);
2247 isp->dev = &pdev->dev;
2250 ret = dma_coerce_mask_and_coherent(isp->dev, DMA_BIT_MASK(32));
2254 platform_set_drvdata(pdev, isp);
2257 isp->isp_csiphy1.vdd = devm_regulator_get(&pdev->dev, "vdd-csiphy1");
2258 isp->isp_csiphy2.vdd = devm_regulator_get(&pdev->dev, "vdd-csiphy2");
2262 * The ISP clock tree is revision-dependent. We thus need to enable ICLK
2263 * manually to read the revision before calling __omap3isp_get().
2265 * Start by mapping the ISP MMIO area, which is in two pieces.
2266 * The ISP IOMMU is in between. Map both now, and fill in the
2267 * ISP revision specific portions a little later in the
2270 for (i = 0; i < 2; i++) {
2271 unsigned int map_idx = i ? OMAP3_ISP_IOMEM_CSI2A_REGS1 : 0;
2273 mem = platform_get_resource(pdev, IORESOURCE_MEM, i);
2274 isp->mmio_base[map_idx] =
2275 devm_ioremap_resource(isp->dev, mem);
2276 if (IS_ERR(isp->mmio_base[map_idx])) {
2277 ret = PTR_ERR(isp->mmio_base[map_idx]);
2282 ret = isp_get_clocks(isp);
2286 ret = clk_enable(isp->clock[ISP_CLK_CAM_ICK]);
2290 isp->revision = isp_reg_readl(isp, OMAP3_ISP_IOMEM_MAIN, ISP_REVISION);
2291 dev_info(isp->dev, "Revision %d.%d found\n",
2292 (isp->revision & 0xf0) >> 4, isp->revision & 0x0f);
2294 clk_disable(isp->clock[ISP_CLK_CAM_ICK]);
2296 if (__omap3isp_get(isp, false) == NULL) {
2301 ret = isp_reset(isp);
2305 ret = isp_xclk_init(isp);
2309 /* Memory resources */
2310 for (m = 0; m < ARRAY_SIZE(isp_res_maps); m++)
2311 if (isp->revision == isp_res_maps[m].isp_rev)
2314 if (m == ARRAY_SIZE(isp_res_maps)) {
2315 dev_err(isp->dev, "No resource map found for ISP rev %d.%d\n",
2316 (isp->revision & 0xf0) >> 4, isp->revision & 0xf);
2321 for (i = 1; i < OMAP3_ISP_IOMEM_CSI2A_REGS1; i++)
2323 isp->mmio_base[0] + isp_res_maps[m].offset[i];
2325 for (i = OMAP3_ISP_IOMEM_CSIPHY2; i < OMAP3_ISP_IOMEM_LAST; i++)
2327 isp->mmio_base[OMAP3_ISP_IOMEM_CSI2A_REGS1]
2328 + isp_res_maps[m].offset[i];
2330 isp->mmio_hist_base_phys =
2331 mem->start + isp_res_maps[m].offset[OMAP3_ISP_IOMEM_HIST];
2334 ret = isp_attach_iommu(isp);
2336 dev_err(&pdev->dev, "unable to attach to IOMMU\n");
2341 ret = platform_get_irq(pdev, 0);
2343 dev_err(isp->dev, "No IRQ resource\n");
2349 if (devm_request_irq(isp->dev, isp->irq_num, isp_isr, IRQF_SHARED,
2350 "OMAP3 ISP", isp)) {
2351 dev_err(isp->dev, "Unable to request IRQ\n");
2357 ret = isp_initialize_modules(isp);
2361 ret = isp_register_entities(isp);
2365 ret = isp_create_links(isp);
2367 goto error_register_entities;
2369 isp->notifier.bound = isp_subdev_notifier_bound;
2370 isp->notifier.complete = isp_subdev_notifier_complete;
2372 ret = v4l2_async_notifier_register(&isp->v4l2_dev, &isp->notifier);
2374 goto error_register_entities;
2376 isp_core_init(isp, 1);
2381 error_register_entities:
2382 isp_unregister_entities(isp);
2384 isp_cleanup_modules(isp);
2386 isp_detach_iommu(isp);
2388 isp_xclk_cleanup(isp);
2389 __omap3isp_put(isp, false);
2391 mutex_destroy(&isp->isp_mutex);
2396 static const struct dev_pm_ops omap3isp_pm_ops = {
2397 .prepare = isp_pm_prepare,
2398 .suspend = isp_pm_suspend,
2399 .resume = isp_pm_resume,
2400 .complete = isp_pm_complete,
2403 static struct platform_device_id omap3isp_id_table[] = {
2407 MODULE_DEVICE_TABLE(platform, omap3isp_id_table);
2409 static const struct of_device_id omap3isp_of_table[] = {
2410 { .compatible = "ti,omap3-isp" },
2413 MODULE_DEVICE_TABLE(of, omap3isp_of_table);
2415 static struct platform_driver omap3isp_driver = {
2417 .remove = isp_remove,
2418 .id_table = omap3isp_id_table,
2421 .pm = &omap3isp_pm_ops,
2422 .of_match_table = omap3isp_of_table,
2426 module_platform_driver(omap3isp_driver);
2428 MODULE_AUTHOR("Nokia Corporation");
2429 MODULE_DESCRIPTION("TI OMAP3 ISP driver");
2430 MODULE_LICENSE("GPL");
2431 MODULE_VERSION(ISP_VIDEO_DRIVER_VERSION);