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-of.h>
72 #include "isppreview.h"
73 #include "ispresizer.h"
79 static unsigned int autoidle
;
80 module_param(autoidle
, int, 0444);
81 MODULE_PARM_DESC(autoidle
, "Enable OMAP3ISP AUTOIDLE support");
83 static void isp_save_ctx(struct isp_device
*isp
);
85 static void isp_restore_ctx(struct isp_device
*isp
);
87 static const struct isp_res_mapping isp_res_maps
[] = {
89 .isp_rev
= ISP_REVISION_2_0
,
92 0x0000, /* base, len 0x0070 */
93 0x0400, /* ccp2, len 0x01f0 */
94 0x0600, /* ccdc, len 0x00a8 */
95 0x0a00, /* hist, len 0x0048 */
96 0x0c00, /* h3a, len 0x0060 */
97 0x0e00, /* preview, len 0x00a0 */
98 0x1000, /* resizer, len 0x00ac */
99 0x1200, /* sbl, len 0x00fc */
100 /* second MMIO area */
101 0x0000, /* csi2a, len 0x0170 */
102 0x0170, /* csiphy2, len 0x000c */
104 .phy_type
= ISP_PHY_TYPE_3430
,
107 .isp_rev
= ISP_REVISION_15_0
,
109 /* first MMIO area */
110 0x0000, /* base, len 0x0070 */
111 0x0400, /* ccp2, len 0x01f0 */
112 0x0600, /* ccdc, len 0x00a8 */
113 0x0a00, /* hist, len 0x0048 */
114 0x0c00, /* h3a, len 0x0060 */
115 0x0e00, /* preview, len 0x00a0 */
116 0x1000, /* resizer, len 0x00ac */
117 0x1200, /* sbl, len 0x00fc */
118 /* second MMIO area */
119 0x0000, /* csi2a, len 0x0170 (1st area) */
120 0x0170, /* csiphy2, len 0x000c */
121 0x01c0, /* csi2a, len 0x0040 (2nd area) */
122 0x0400, /* csi2c, len 0x0170 (1st area) */
123 0x0570, /* csiphy1, len 0x000c */
124 0x05c0, /* csi2c, len 0x0040 (2nd area) */
126 .phy_type
= ISP_PHY_TYPE_3630
,
130 /* Structure for saving/restoring ISP module registers */
131 static struct isp_reg isp_reg_list
[] = {
132 {OMAP3_ISP_IOMEM_MAIN
, ISP_SYSCONFIG
, 0},
133 {OMAP3_ISP_IOMEM_MAIN
, ISP_CTRL
, 0},
134 {OMAP3_ISP_IOMEM_MAIN
, ISP_TCTRL_CTRL
, 0},
139 * omap3isp_flush - Post pending L3 bus writes by doing a register readback
140 * @isp: OMAP3 ISP device
142 * In order to force posting of pending writes, we need to write and
143 * readback the same register, in this case the revision register.
145 * See this link for reference:
146 * http://www.mail-archive.com/linux-omap@vger.kernel.org/msg08149.html
148 void omap3isp_flush(struct isp_device
*isp
)
150 isp_reg_writel(isp
, 0, OMAP3_ISP_IOMEM_MAIN
, ISP_REVISION
);
151 isp_reg_readl(isp
, OMAP3_ISP_IOMEM_MAIN
, ISP_REVISION
);
154 /* -----------------------------------------------------------------------------
158 #define to_isp_xclk(_hw) container_of(_hw, struct isp_xclk, hw)
160 static void isp_xclk_update(struct isp_xclk
*xclk
, u32 divider
)
164 isp_reg_clr_set(xclk
->isp
, OMAP3_ISP_IOMEM_MAIN
, ISP_TCTRL_CTRL
,
165 ISPTCTRL_CTRL_DIVA_MASK
,
166 divider
<< ISPTCTRL_CTRL_DIVA_SHIFT
);
169 isp_reg_clr_set(xclk
->isp
, OMAP3_ISP_IOMEM_MAIN
, ISP_TCTRL_CTRL
,
170 ISPTCTRL_CTRL_DIVB_MASK
,
171 divider
<< ISPTCTRL_CTRL_DIVB_SHIFT
);
176 static int isp_xclk_prepare(struct clk_hw
*hw
)
178 struct isp_xclk
*xclk
= to_isp_xclk(hw
);
180 omap3isp_get(xclk
->isp
);
185 static void isp_xclk_unprepare(struct clk_hw
*hw
)
187 struct isp_xclk
*xclk
= to_isp_xclk(hw
);
189 omap3isp_put(xclk
->isp
);
192 static int isp_xclk_enable(struct clk_hw
*hw
)
194 struct isp_xclk
*xclk
= to_isp_xclk(hw
);
197 spin_lock_irqsave(&xclk
->lock
, flags
);
198 isp_xclk_update(xclk
, xclk
->divider
);
199 xclk
->enabled
= true;
200 spin_unlock_irqrestore(&xclk
->lock
, flags
);
205 static void isp_xclk_disable(struct clk_hw
*hw
)
207 struct isp_xclk
*xclk
= to_isp_xclk(hw
);
210 spin_lock_irqsave(&xclk
->lock
, flags
);
211 isp_xclk_update(xclk
, 0);
212 xclk
->enabled
= false;
213 spin_unlock_irqrestore(&xclk
->lock
, flags
);
216 static unsigned long isp_xclk_recalc_rate(struct clk_hw
*hw
,
217 unsigned long parent_rate
)
219 struct isp_xclk
*xclk
= to_isp_xclk(hw
);
221 return parent_rate
/ xclk
->divider
;
224 static u32
isp_xclk_calc_divider(unsigned long *rate
, unsigned long parent_rate
)
228 if (*rate
>= parent_rate
) {
230 return ISPTCTRL_CTRL_DIV_BYPASS
;
236 divider
= DIV_ROUND_CLOSEST(parent_rate
, *rate
);
237 if (divider
>= ISPTCTRL_CTRL_DIV_BYPASS
)
238 divider
= ISPTCTRL_CTRL_DIV_BYPASS
- 1;
240 *rate
= parent_rate
/ divider
;
244 static long isp_xclk_round_rate(struct clk_hw
*hw
, unsigned long rate
,
245 unsigned long *parent_rate
)
247 isp_xclk_calc_divider(&rate
, *parent_rate
);
251 static int isp_xclk_set_rate(struct clk_hw
*hw
, unsigned long rate
,
252 unsigned long parent_rate
)
254 struct isp_xclk
*xclk
= to_isp_xclk(hw
);
258 divider
= isp_xclk_calc_divider(&rate
, parent_rate
);
260 spin_lock_irqsave(&xclk
->lock
, flags
);
262 xclk
->divider
= divider
;
264 isp_xclk_update(xclk
, divider
);
266 spin_unlock_irqrestore(&xclk
->lock
, flags
);
268 dev_dbg(xclk
->isp
->dev
, "%s: cam_xclk%c set to %lu Hz (div %u)\n",
269 __func__
, xclk
->id
== ISP_XCLK_A
? 'a' : 'b', rate
, divider
);
273 static const struct clk_ops isp_xclk_ops
= {
274 .prepare
= isp_xclk_prepare
,
275 .unprepare
= isp_xclk_unprepare
,
276 .enable
= isp_xclk_enable
,
277 .disable
= isp_xclk_disable
,
278 .recalc_rate
= isp_xclk_recalc_rate
,
279 .round_rate
= isp_xclk_round_rate
,
280 .set_rate
= isp_xclk_set_rate
,
283 static const char *isp_xclk_parent_name
= "cam_mclk";
285 static const struct clk_init_data isp_xclk_init_data
= {
287 .ops
= &isp_xclk_ops
,
288 .parent_names
= &isp_xclk_parent_name
,
292 static struct clk
*isp_xclk_src_get(struct of_phandle_args
*clkspec
, void *data
)
294 unsigned int idx
= clkspec
->args
[0];
295 struct isp_device
*isp
= data
;
297 if (idx
>= ARRAY_SIZE(isp
->xclks
))
298 return ERR_PTR(-ENOENT
);
300 return isp
->xclks
[idx
].clk
;
303 static int isp_xclk_init(struct isp_device
*isp
)
305 struct device_node
*np
= isp
->dev
->of_node
;
306 struct clk_init_data init
;
309 for (i
= 0; i
< ARRAY_SIZE(isp
->xclks
); ++i
)
310 isp
->xclks
[i
].clk
= ERR_PTR(-EINVAL
);
312 for (i
= 0; i
< ARRAY_SIZE(isp
->xclks
); ++i
) {
313 struct isp_xclk
*xclk
= &isp
->xclks
[i
];
316 xclk
->id
= i
== 0 ? ISP_XCLK_A
: ISP_XCLK_B
;
318 spin_lock_init(&xclk
->lock
);
320 init
.name
= i
== 0 ? "cam_xclka" : "cam_xclkb";
321 init
.ops
= &isp_xclk_ops
;
322 init
.parent_names
= &isp_xclk_parent_name
;
323 init
.num_parents
= 1;
325 xclk
->hw
.init
= &init
;
327 * The first argument is NULL in order to avoid circular
328 * reference, as this driver takes reference on the
329 * sensor subdevice modules and the sensors would take
330 * reference on this module through clk_get().
332 xclk
->clk
= clk_register(NULL
, &xclk
->hw
);
333 if (IS_ERR(xclk
->clk
))
334 return PTR_ERR(xclk
->clk
);
338 of_clk_add_provider(np
, isp_xclk_src_get
, isp
);
343 static void isp_xclk_cleanup(struct isp_device
*isp
)
345 struct device_node
*np
= isp
->dev
->of_node
;
349 of_clk_del_provider(np
);
351 for (i
= 0; i
< ARRAY_SIZE(isp
->xclks
); ++i
) {
352 struct isp_xclk
*xclk
= &isp
->xclks
[i
];
354 if (!IS_ERR(xclk
->clk
))
355 clk_unregister(xclk
->clk
);
359 /* -----------------------------------------------------------------------------
364 * isp_enable_interrupts - Enable ISP interrupts.
365 * @isp: OMAP3 ISP device
367 static void isp_enable_interrupts(struct isp_device
*isp
)
369 static const u32 irq
= IRQ0ENABLE_CSIA_IRQ
370 | IRQ0ENABLE_CSIB_IRQ
371 | IRQ0ENABLE_CCDC_LSC_PREF_ERR_IRQ
372 | IRQ0ENABLE_CCDC_LSC_DONE_IRQ
373 | IRQ0ENABLE_CCDC_VD0_IRQ
374 | IRQ0ENABLE_CCDC_VD1_IRQ
375 | IRQ0ENABLE_HS_VS_IRQ
376 | IRQ0ENABLE_HIST_DONE_IRQ
377 | IRQ0ENABLE_H3A_AWB_DONE_IRQ
378 | IRQ0ENABLE_H3A_AF_DONE_IRQ
379 | IRQ0ENABLE_PRV_DONE_IRQ
380 | IRQ0ENABLE_RSZ_DONE_IRQ
;
382 isp_reg_writel(isp
, irq
, OMAP3_ISP_IOMEM_MAIN
, ISP_IRQ0STATUS
);
383 isp_reg_writel(isp
, irq
, OMAP3_ISP_IOMEM_MAIN
, ISP_IRQ0ENABLE
);
387 * isp_disable_interrupts - Disable ISP interrupts.
388 * @isp: OMAP3 ISP device
390 static void isp_disable_interrupts(struct isp_device
*isp
)
392 isp_reg_writel(isp
, 0, OMAP3_ISP_IOMEM_MAIN
, ISP_IRQ0ENABLE
);
396 * isp_core_init - ISP core settings
397 * @isp: OMAP3 ISP device
398 * @idle: Consider idle state.
400 * Set the power settings for the ISP and SBL bus and configure the HS/VS
403 * We need to configure the HS/VS interrupt source before interrupts get
404 * enabled, as the sensor might be free-running and the ISP default setting
405 * (HS edge) would put an unnecessary burden on the CPU.
407 static void isp_core_init(struct isp_device
*isp
, int idle
)
410 ((idle
? ISP_SYSCONFIG_MIDLEMODE_SMARTSTANDBY
:
411 ISP_SYSCONFIG_MIDLEMODE_FORCESTANDBY
) <<
412 ISP_SYSCONFIG_MIDLEMODE_SHIFT
) |
413 ((isp
->revision
== ISP_REVISION_15_0
) ?
414 ISP_SYSCONFIG_AUTOIDLE
: 0),
415 OMAP3_ISP_IOMEM_MAIN
, ISP_SYSCONFIG
);
418 (isp
->autoidle
? ISPCTRL_SBL_AUTOIDLE
: 0) |
419 ISPCTRL_SYNC_DETECT_VSRISE
,
420 OMAP3_ISP_IOMEM_MAIN
, ISP_CTRL
);
424 * Configure the bridge and lane shifter. Valid inputs are
426 * CCDC_INPUT_PARALLEL: Parallel interface
427 * CCDC_INPUT_CSI2A: CSI2a receiver
428 * CCDC_INPUT_CCP2B: CCP2b receiver
429 * CCDC_INPUT_CSI2C: CSI2c receiver
431 * The bridge and lane shifter are configured according to the selected input
432 * and the ISP platform data.
434 void omap3isp_configure_bridge(struct isp_device
*isp
,
435 enum ccdc_input_entity input
,
436 const struct isp_parallel_cfg
*parcfg
,
437 unsigned int shift
, unsigned int bridge
)
441 ispctrl_val
= isp_reg_readl(isp
, OMAP3_ISP_IOMEM_MAIN
, ISP_CTRL
);
442 ispctrl_val
&= ~ISPCTRL_SHIFT_MASK
;
443 ispctrl_val
&= ~ISPCTRL_PAR_CLK_POL_INV
;
444 ispctrl_val
&= ~ISPCTRL_PAR_SER_CLK_SEL_MASK
;
445 ispctrl_val
&= ~ISPCTRL_PAR_BRIDGE_MASK
;
446 ispctrl_val
|= bridge
;
449 case CCDC_INPUT_PARALLEL
:
450 ispctrl_val
|= ISPCTRL_PAR_SER_CLK_SEL_PARALLEL
;
451 ispctrl_val
|= parcfg
->clk_pol
<< ISPCTRL_PAR_CLK_POL_SHIFT
;
452 shift
+= parcfg
->data_lane_shift
* 2;
455 case CCDC_INPUT_CSI2A
:
456 ispctrl_val
|= ISPCTRL_PAR_SER_CLK_SEL_CSIA
;
459 case CCDC_INPUT_CCP2B
:
460 ispctrl_val
|= ISPCTRL_PAR_SER_CLK_SEL_CSIB
;
463 case CCDC_INPUT_CSI2C
:
464 ispctrl_val
|= ISPCTRL_PAR_SER_CLK_SEL_CSIC
;
471 ispctrl_val
|= ((shift
/2) << ISPCTRL_SHIFT_SHIFT
) & ISPCTRL_SHIFT_MASK
;
473 isp_reg_writel(isp
, ispctrl_val
, OMAP3_ISP_IOMEM_MAIN
, ISP_CTRL
);
476 void omap3isp_hist_dma_done(struct isp_device
*isp
)
478 if (omap3isp_ccdc_busy(&isp
->isp_ccdc
) ||
479 omap3isp_stat_pcr_busy(&isp
->isp_hist
)) {
480 /* Histogram cannot be enabled in this frame anymore */
481 atomic_set(&isp
->isp_hist
.buf_err
, 1);
482 dev_dbg(isp
->dev
, "hist: Out of synchronization with "
483 "CCDC. Ignoring next buffer.\n");
487 static inline void isp_isr_dbg(struct isp_device
*isp
, u32 irqstatus
)
489 static const char *name
[] = {
508 "CCDC_LSC_PREFETCH_COMPLETED",
509 "CCDC_LSC_PREFETCH_ERROR",
525 dev_dbg(isp
->dev
, "ISP IRQ: ");
527 for (i
= 0; i
< ARRAY_SIZE(name
); i
++) {
528 if ((1 << i
) & irqstatus
)
529 printk(KERN_CONT
"%s ", name
[i
]);
531 printk(KERN_CONT
"\n");
534 static void isp_isr_sbl(struct isp_device
*isp
)
536 struct device
*dev
= isp
->dev
;
537 struct isp_pipeline
*pipe
;
541 * Handle shared buffer logic overflows for video buffers.
542 * ISPSBL_PCR_CCDCPRV_2_RSZ_OVF can be safely ignored.
544 sbl_pcr
= isp_reg_readl(isp
, OMAP3_ISP_IOMEM_SBL
, ISPSBL_PCR
);
545 isp_reg_writel(isp
, sbl_pcr
, OMAP3_ISP_IOMEM_SBL
, ISPSBL_PCR
);
546 sbl_pcr
&= ~ISPSBL_PCR_CCDCPRV_2_RSZ_OVF
;
549 dev_dbg(dev
, "SBL overflow (PCR = 0x%08x)\n", sbl_pcr
);
551 if (sbl_pcr
& ISPSBL_PCR_CSIB_WBL_OVF
) {
552 pipe
= to_isp_pipeline(&isp
->isp_ccp2
.subdev
.entity
);
557 if (sbl_pcr
& ISPSBL_PCR_CSIA_WBL_OVF
) {
558 pipe
= to_isp_pipeline(&isp
->isp_csi2a
.subdev
.entity
);
563 if (sbl_pcr
& ISPSBL_PCR_CCDC_WBL_OVF
) {
564 pipe
= to_isp_pipeline(&isp
->isp_ccdc
.subdev
.entity
);
569 if (sbl_pcr
& ISPSBL_PCR_PRV_WBL_OVF
) {
570 pipe
= to_isp_pipeline(&isp
->isp_prev
.subdev
.entity
);
575 if (sbl_pcr
& (ISPSBL_PCR_RSZ1_WBL_OVF
576 | ISPSBL_PCR_RSZ2_WBL_OVF
577 | ISPSBL_PCR_RSZ3_WBL_OVF
578 | ISPSBL_PCR_RSZ4_WBL_OVF
)) {
579 pipe
= to_isp_pipeline(&isp
->isp_res
.subdev
.entity
);
584 if (sbl_pcr
& ISPSBL_PCR_H3A_AF_WBL_OVF
)
585 omap3isp_stat_sbl_overflow(&isp
->isp_af
);
587 if (sbl_pcr
& ISPSBL_PCR_H3A_AEAWB_WBL_OVF
)
588 omap3isp_stat_sbl_overflow(&isp
->isp_aewb
);
592 * isp_isr - Interrupt Service Routine for Camera ISP module.
593 * @irq: Not used currently.
594 * @_isp: Pointer to the OMAP3 ISP device
596 * Handles the corresponding callback if plugged in.
598 static irqreturn_t
isp_isr(int irq
, void *_isp
)
600 static const u32 ccdc_events
= IRQ0STATUS_CCDC_LSC_PREF_ERR_IRQ
|
601 IRQ0STATUS_CCDC_LSC_DONE_IRQ
|
602 IRQ0STATUS_CCDC_VD0_IRQ
|
603 IRQ0STATUS_CCDC_VD1_IRQ
|
604 IRQ0STATUS_HS_VS_IRQ
;
605 struct isp_device
*isp
= _isp
;
608 irqstatus
= isp_reg_readl(isp
, OMAP3_ISP_IOMEM_MAIN
, ISP_IRQ0STATUS
);
609 isp_reg_writel(isp
, irqstatus
, OMAP3_ISP_IOMEM_MAIN
, ISP_IRQ0STATUS
);
613 if (irqstatus
& IRQ0STATUS_CSIA_IRQ
)
614 omap3isp_csi2_isr(&isp
->isp_csi2a
);
616 if (irqstatus
& IRQ0STATUS_CSIB_IRQ
)
617 omap3isp_ccp2_isr(&isp
->isp_ccp2
);
619 if (irqstatus
& IRQ0STATUS_CCDC_VD0_IRQ
) {
620 if (isp
->isp_ccdc
.output
& CCDC_OUTPUT_PREVIEW
)
621 omap3isp_preview_isr_frame_sync(&isp
->isp_prev
);
622 if (isp
->isp_ccdc
.output
& CCDC_OUTPUT_RESIZER
)
623 omap3isp_resizer_isr_frame_sync(&isp
->isp_res
);
624 omap3isp_stat_isr_frame_sync(&isp
->isp_aewb
);
625 omap3isp_stat_isr_frame_sync(&isp
->isp_af
);
626 omap3isp_stat_isr_frame_sync(&isp
->isp_hist
);
629 if (irqstatus
& ccdc_events
)
630 omap3isp_ccdc_isr(&isp
->isp_ccdc
, irqstatus
& ccdc_events
);
632 if (irqstatus
& IRQ0STATUS_PRV_DONE_IRQ
) {
633 if (isp
->isp_prev
.output
& PREVIEW_OUTPUT_RESIZER
)
634 omap3isp_resizer_isr_frame_sync(&isp
->isp_res
);
635 omap3isp_preview_isr(&isp
->isp_prev
);
638 if (irqstatus
& IRQ0STATUS_RSZ_DONE_IRQ
)
639 omap3isp_resizer_isr(&isp
->isp_res
);
641 if (irqstatus
& IRQ0STATUS_H3A_AWB_DONE_IRQ
)
642 omap3isp_stat_isr(&isp
->isp_aewb
);
644 if (irqstatus
& IRQ0STATUS_H3A_AF_DONE_IRQ
)
645 omap3isp_stat_isr(&isp
->isp_af
);
647 if (irqstatus
& IRQ0STATUS_HIST_DONE_IRQ
)
648 omap3isp_stat_isr(&isp
->isp_hist
);
652 #if defined(DEBUG) && defined(ISP_ISR_DEBUG)
653 isp_isr_dbg(isp
, irqstatus
);
659 /* -----------------------------------------------------------------------------
660 * Pipeline power management
662 * Entities must be powered up when part of a pipeline that contains at least
663 * one open video device node.
665 * To achieve this use the entity use_count field to track the number of users.
666 * For entities corresponding to video device nodes the use_count field stores
667 * the users count of the node. For entities corresponding to subdevs the
668 * use_count field stores the total number of users of all video device nodes
671 * The omap3isp_pipeline_pm_use() function must be called in the open() and
672 * close() handlers of video device nodes. It increments or decrements the use
673 * count of all subdev entities in the pipeline.
675 * To react to link management on powered pipelines, the link setup notification
676 * callback updates the use count of all entities in the source and sink sides
681 * isp_pipeline_pm_use_count - Count the number of users of a pipeline
682 * @entity: The entity
684 * Return the total number of users of all video device nodes in the pipeline.
686 static int isp_pipeline_pm_use_count(struct media_entity
*entity
)
688 struct media_entity_graph graph
;
691 media_entity_graph_walk_start(&graph
, entity
);
693 while ((entity
= media_entity_graph_walk_next(&graph
))) {
694 if (media_entity_type(entity
) == MEDIA_ENT_T_DEVNODE
)
695 use
+= entity
->use_count
;
702 * isp_pipeline_pm_power_one - Apply power change to an entity
703 * @entity: The entity
704 * @change: Use count change
706 * Change the entity use count by @change. If the entity is a subdev update its
707 * power state by calling the core::s_power operation when the use count goes
708 * from 0 to != 0 or from != 0 to 0.
710 * Return 0 on success or a negative error code on failure.
712 static int isp_pipeline_pm_power_one(struct media_entity
*entity
, int change
)
714 struct v4l2_subdev
*subdev
;
717 subdev
= media_entity_type(entity
) == MEDIA_ENT_T_V4L2_SUBDEV
718 ? media_entity_to_v4l2_subdev(entity
) : NULL
;
720 if (entity
->use_count
== 0 && change
> 0 && subdev
!= NULL
) {
721 ret
= v4l2_subdev_call(subdev
, core
, s_power
, 1);
722 if (ret
< 0 && ret
!= -ENOIOCTLCMD
)
726 entity
->use_count
+= change
;
727 WARN_ON(entity
->use_count
< 0);
729 if (entity
->use_count
== 0 && change
< 0 && subdev
!= NULL
)
730 v4l2_subdev_call(subdev
, core
, s_power
, 0);
736 * isp_pipeline_pm_power - Apply power change to all entities in a pipeline
737 * @entity: The entity
738 * @change: Use count change
740 * Walk the pipeline to update the use count and the power state of all non-node
743 * Return 0 on success or a negative error code on failure.
745 static int isp_pipeline_pm_power(struct media_entity
*entity
, int change
)
747 struct media_entity_graph graph
;
748 struct media_entity
*first
= entity
;
754 media_entity_graph_walk_start(&graph
, entity
);
756 while (!ret
&& (entity
= media_entity_graph_walk_next(&graph
)))
757 if (media_entity_type(entity
) != MEDIA_ENT_T_DEVNODE
)
758 ret
= isp_pipeline_pm_power_one(entity
, change
);
763 media_entity_graph_walk_start(&graph
, first
);
765 while ((first
= media_entity_graph_walk_next(&graph
))
767 if (media_entity_type(first
) != MEDIA_ENT_T_DEVNODE
)
768 isp_pipeline_pm_power_one(first
, -change
);
774 * omap3isp_pipeline_pm_use - Update the use count of an entity
775 * @entity: The entity
776 * @use: Use (1) or stop using (0) the entity
778 * Update the use count of all entities in the pipeline and power entities on or
781 * Return 0 on success or a negative error code on failure. Powering entities
782 * off is assumed to never fail. No failure can occur when the use parameter is
785 int omap3isp_pipeline_pm_use(struct media_entity
*entity
, int use
)
787 int change
= use
? 1 : -1;
790 mutex_lock(&entity
->parent
->graph_mutex
);
792 /* Apply use count to node. */
793 entity
->use_count
+= change
;
794 WARN_ON(entity
->use_count
< 0);
796 /* Apply power change to connected non-nodes. */
797 ret
= isp_pipeline_pm_power(entity
, change
);
799 entity
->use_count
-= change
;
801 mutex_unlock(&entity
->parent
->graph_mutex
);
807 * isp_pipeline_link_notify - Link management notification callback
809 * @flags: New link flags that will be applied
810 * @notification: The link's state change notification type (MEDIA_DEV_NOTIFY_*)
812 * React to link management on powered pipelines by updating the use count of
813 * all entities in the source and sink sides of the link. Entities are powered
814 * on or off accordingly.
816 * Return 0 on success or a negative error code on failure. Powering entities
817 * off is assumed to never fail. This function will not fail for disconnection
820 static int isp_pipeline_link_notify(struct media_link
*link
, u32 flags
,
821 unsigned int notification
)
823 struct media_entity
*source
= link
->source
->entity
;
824 struct media_entity
*sink
= link
->sink
->entity
;
825 int source_use
= isp_pipeline_pm_use_count(source
);
826 int sink_use
= isp_pipeline_pm_use_count(sink
);
829 if (notification
== MEDIA_DEV_NOTIFY_POST_LINK_CH
&&
830 !(flags
& MEDIA_LNK_FL_ENABLED
)) {
831 /* Powering off entities is assumed to never fail. */
832 isp_pipeline_pm_power(source
, -sink_use
);
833 isp_pipeline_pm_power(sink
, -source_use
);
837 if (notification
== MEDIA_DEV_NOTIFY_PRE_LINK_CH
&&
838 (flags
& MEDIA_LNK_FL_ENABLED
)) {
840 ret
= isp_pipeline_pm_power(source
, sink_use
);
844 ret
= isp_pipeline_pm_power(sink
, source_use
);
846 isp_pipeline_pm_power(source
, -sink_use
);
854 /* -----------------------------------------------------------------------------
855 * Pipeline stream management
859 * isp_pipeline_enable - Enable streaming on a pipeline
860 * @pipe: ISP pipeline
861 * @mode: Stream mode (single shot or continuous)
863 * Walk the entities chain starting at the pipeline output video node and start
864 * all modules in the chain in the given mode.
866 * Return 0 if successful, or the return value of the failed video::s_stream
867 * operation otherwise.
869 static int isp_pipeline_enable(struct isp_pipeline
*pipe
,
870 enum isp_pipeline_stream_state mode
)
872 struct isp_device
*isp
= pipe
->output
->isp
;
873 struct media_entity
*entity
;
874 struct media_pad
*pad
;
875 struct v4l2_subdev
*subdev
;
879 /* Refuse to start streaming if an entity included in the pipeline has
880 * crashed. This check must be performed before the loop below to avoid
881 * starting entities if the pipeline won't start anyway (those entities
882 * would then likely fail to stop, making the problem worse).
884 if (pipe
->entities
& isp
->crashed
)
887 spin_lock_irqsave(&pipe
->lock
, flags
);
888 pipe
->state
&= ~(ISP_PIPELINE_IDLE_INPUT
| ISP_PIPELINE_IDLE_OUTPUT
);
889 spin_unlock_irqrestore(&pipe
->lock
, flags
);
891 pipe
->do_propagation
= false;
893 entity
= &pipe
->output
->video
.entity
;
895 pad
= &entity
->pads
[0];
896 if (!(pad
->flags
& MEDIA_PAD_FL_SINK
))
899 pad
= media_entity_remote_pad(pad
);
901 media_entity_type(pad
->entity
) != MEDIA_ENT_T_V4L2_SUBDEV
)
904 entity
= pad
->entity
;
905 subdev
= media_entity_to_v4l2_subdev(entity
);
907 ret
= v4l2_subdev_call(subdev
, video
, s_stream
, mode
);
908 if (ret
< 0 && ret
!= -ENOIOCTLCMD
)
911 if (subdev
== &isp
->isp_ccdc
.subdev
) {
912 v4l2_subdev_call(&isp
->isp_aewb
.subdev
, video
,
914 v4l2_subdev_call(&isp
->isp_af
.subdev
, video
,
916 v4l2_subdev_call(&isp
->isp_hist
.subdev
, video
,
918 pipe
->do_propagation
= true;
925 static int isp_pipeline_wait_resizer(struct isp_device
*isp
)
927 return omap3isp_resizer_busy(&isp
->isp_res
);
930 static int isp_pipeline_wait_preview(struct isp_device
*isp
)
932 return omap3isp_preview_busy(&isp
->isp_prev
);
935 static int isp_pipeline_wait_ccdc(struct isp_device
*isp
)
937 return omap3isp_stat_busy(&isp
->isp_af
)
938 || omap3isp_stat_busy(&isp
->isp_aewb
)
939 || omap3isp_stat_busy(&isp
->isp_hist
)
940 || omap3isp_ccdc_busy(&isp
->isp_ccdc
);
943 #define ISP_STOP_TIMEOUT msecs_to_jiffies(1000)
945 static int isp_pipeline_wait(struct isp_device
*isp
,
946 int(*busy
)(struct isp_device
*isp
))
948 unsigned long timeout
= jiffies
+ ISP_STOP_TIMEOUT
;
950 while (!time_after(jiffies
, timeout
)) {
959 * isp_pipeline_disable - Disable streaming on a pipeline
960 * @pipe: ISP pipeline
962 * Walk the entities chain starting at the pipeline output video node and stop
963 * all modules in the chain. Wait synchronously for the modules to be stopped if
966 * Return 0 if all modules have been properly stopped, or -ETIMEDOUT if a module
967 * can't be stopped (in which case a software reset of the ISP is probably
970 static int isp_pipeline_disable(struct isp_pipeline
*pipe
)
972 struct isp_device
*isp
= pipe
->output
->isp
;
973 struct media_entity
*entity
;
974 struct media_pad
*pad
;
975 struct v4l2_subdev
*subdev
;
981 * We need to stop all the modules after CCDC first or they'll
982 * never stop since they may not get a full frame from CCDC.
984 entity
= &pipe
->output
->video
.entity
;
986 pad
= &entity
->pads
[0];
987 if (!(pad
->flags
& MEDIA_PAD_FL_SINK
))
990 pad
= media_entity_remote_pad(pad
);
992 media_entity_type(pad
->entity
) != MEDIA_ENT_T_V4L2_SUBDEV
)
995 entity
= pad
->entity
;
996 subdev
= media_entity_to_v4l2_subdev(entity
);
998 if (subdev
== &isp
->isp_ccdc
.subdev
) {
999 v4l2_subdev_call(&isp
->isp_aewb
.subdev
,
1000 video
, s_stream
, 0);
1001 v4l2_subdev_call(&isp
->isp_af
.subdev
,
1002 video
, s_stream
, 0);
1003 v4l2_subdev_call(&isp
->isp_hist
.subdev
,
1004 video
, s_stream
, 0);
1007 ret
= v4l2_subdev_call(subdev
, video
, s_stream
, 0);
1009 if (subdev
== &isp
->isp_res
.subdev
)
1010 ret
|= isp_pipeline_wait(isp
, isp_pipeline_wait_resizer
);
1011 else if (subdev
== &isp
->isp_prev
.subdev
)
1012 ret
|= isp_pipeline_wait(isp
, isp_pipeline_wait_preview
);
1013 else if (subdev
== &isp
->isp_ccdc
.subdev
)
1014 ret
|= isp_pipeline_wait(isp
, isp_pipeline_wait_ccdc
);
1016 /* Handle stop failures. An entity that fails to stop can
1017 * usually just be restarted. Flag the stop failure nonetheless
1018 * to trigger an ISP reset the next time the device is released,
1021 * The preview engine is a special case. A failure to stop can
1022 * mean a hardware crash. When that happens the preview engine
1023 * won't respond to read/write operations on the L4 bus anymore,
1024 * resulting in a bus fault and a kernel oops next time it gets
1025 * accessed. Mark it as crashed to prevent pipelines including
1026 * it from being started.
1029 dev_info(isp
->dev
, "Unable to stop %s\n", subdev
->name
);
1030 isp
->stop_failure
= true;
1031 if (subdev
== &isp
->isp_prev
.subdev
) {
1032 id
= media_entity_id(&subdev
->entity
);
1033 isp
->crashed
|= 1U << id
;
1035 failure
= -ETIMEDOUT
;
1043 * omap3isp_pipeline_set_stream - Enable/disable streaming on a pipeline
1044 * @pipe: ISP pipeline
1045 * @state: Stream state (stopped, single shot or continuous)
1047 * Set the pipeline to the given stream state. Pipelines can be started in
1048 * single-shot or continuous mode.
1050 * Return 0 if successful, or the return value of the failed video::s_stream
1051 * operation otherwise. The pipeline state is not updated when the operation
1052 * fails, except when stopping the pipeline.
1054 int omap3isp_pipeline_set_stream(struct isp_pipeline
*pipe
,
1055 enum isp_pipeline_stream_state state
)
1059 if (state
== ISP_PIPELINE_STREAM_STOPPED
)
1060 ret
= isp_pipeline_disable(pipe
);
1062 ret
= isp_pipeline_enable(pipe
, state
);
1064 if (ret
== 0 || state
== ISP_PIPELINE_STREAM_STOPPED
)
1065 pipe
->stream_state
= state
;
1071 * omap3isp_pipeline_cancel_stream - Cancel stream on a pipeline
1072 * @pipe: ISP pipeline
1074 * Cancelling a stream mark all buffers on all video nodes in the pipeline as
1075 * erroneous and makes sure no new buffer can be queued. This function is called
1076 * when a fatal error that prevents any further operation on the pipeline
1079 void omap3isp_pipeline_cancel_stream(struct isp_pipeline
*pipe
)
1082 omap3isp_video_cancel_stream(pipe
->input
);
1084 omap3isp_video_cancel_stream(pipe
->output
);
1088 * isp_pipeline_resume - Resume streaming on a pipeline
1089 * @pipe: ISP pipeline
1091 * Resume video output and input and re-enable pipeline.
1093 static void isp_pipeline_resume(struct isp_pipeline
*pipe
)
1095 int singleshot
= pipe
->stream_state
== ISP_PIPELINE_STREAM_SINGLESHOT
;
1097 omap3isp_video_resume(pipe
->output
, !singleshot
);
1099 omap3isp_video_resume(pipe
->input
, 0);
1100 isp_pipeline_enable(pipe
, pipe
->stream_state
);
1104 * isp_pipeline_suspend - Suspend streaming on a pipeline
1105 * @pipe: ISP pipeline
1109 static void isp_pipeline_suspend(struct isp_pipeline
*pipe
)
1111 isp_pipeline_disable(pipe
);
1115 * isp_pipeline_is_last - Verify if entity has an enabled link to the output
1117 * @me: ISP module's media entity
1119 * Returns 1 if the entity has an enabled link to the output video node or 0
1120 * otherwise. It's true only while pipeline can have no more than one output
1123 static int isp_pipeline_is_last(struct media_entity
*me
)
1125 struct isp_pipeline
*pipe
;
1126 struct media_pad
*pad
;
1130 pipe
= to_isp_pipeline(me
);
1131 if (pipe
->stream_state
== ISP_PIPELINE_STREAM_STOPPED
)
1133 pad
= media_entity_remote_pad(&pipe
->output
->pad
);
1134 return pad
->entity
== me
;
1138 * isp_suspend_module_pipeline - Suspend pipeline to which belongs the module
1139 * @me: ISP module's media entity
1141 * Suspend the whole pipeline if module's entity has an enabled link to the
1142 * output video node. It works only while pipeline can have no more than one
1145 static void isp_suspend_module_pipeline(struct media_entity
*me
)
1147 if (isp_pipeline_is_last(me
))
1148 isp_pipeline_suspend(to_isp_pipeline(me
));
1152 * isp_resume_module_pipeline - Resume pipeline to which belongs the module
1153 * @me: ISP module's media entity
1155 * Resume the whole pipeline if module's entity has an enabled link to the
1156 * output video node. It works only while pipeline can have no more than one
1159 static void isp_resume_module_pipeline(struct media_entity
*me
)
1161 if (isp_pipeline_is_last(me
))
1162 isp_pipeline_resume(to_isp_pipeline(me
));
1166 * isp_suspend_modules - Suspend ISP submodules.
1167 * @isp: OMAP3 ISP device
1169 * Returns 0 if suspend left in idle state all the submodules properly,
1170 * or returns 1 if a general Reset is required to suspend the submodules.
1172 static int isp_suspend_modules(struct isp_device
*isp
)
1174 unsigned long timeout
;
1176 omap3isp_stat_suspend(&isp
->isp_aewb
);
1177 omap3isp_stat_suspend(&isp
->isp_af
);
1178 omap3isp_stat_suspend(&isp
->isp_hist
);
1179 isp_suspend_module_pipeline(&isp
->isp_res
.subdev
.entity
);
1180 isp_suspend_module_pipeline(&isp
->isp_prev
.subdev
.entity
);
1181 isp_suspend_module_pipeline(&isp
->isp_ccdc
.subdev
.entity
);
1182 isp_suspend_module_pipeline(&isp
->isp_csi2a
.subdev
.entity
);
1183 isp_suspend_module_pipeline(&isp
->isp_ccp2
.subdev
.entity
);
1185 timeout
= jiffies
+ ISP_STOP_TIMEOUT
;
1186 while (omap3isp_stat_busy(&isp
->isp_af
)
1187 || omap3isp_stat_busy(&isp
->isp_aewb
)
1188 || omap3isp_stat_busy(&isp
->isp_hist
)
1189 || omap3isp_preview_busy(&isp
->isp_prev
)
1190 || omap3isp_resizer_busy(&isp
->isp_res
)
1191 || omap3isp_ccdc_busy(&isp
->isp_ccdc
)) {
1192 if (time_after(jiffies
, timeout
)) {
1193 dev_info(isp
->dev
, "can't stop modules.\n");
1203 * isp_resume_modules - Resume ISP submodules.
1204 * @isp: OMAP3 ISP device
1206 static void isp_resume_modules(struct isp_device
*isp
)
1208 omap3isp_stat_resume(&isp
->isp_aewb
);
1209 omap3isp_stat_resume(&isp
->isp_af
);
1210 omap3isp_stat_resume(&isp
->isp_hist
);
1211 isp_resume_module_pipeline(&isp
->isp_res
.subdev
.entity
);
1212 isp_resume_module_pipeline(&isp
->isp_prev
.subdev
.entity
);
1213 isp_resume_module_pipeline(&isp
->isp_ccdc
.subdev
.entity
);
1214 isp_resume_module_pipeline(&isp
->isp_csi2a
.subdev
.entity
);
1215 isp_resume_module_pipeline(&isp
->isp_ccp2
.subdev
.entity
);
1219 * isp_reset - Reset ISP with a timeout wait for idle.
1220 * @isp: OMAP3 ISP device
1222 static int isp_reset(struct isp_device
*isp
)
1224 unsigned long timeout
= 0;
1227 isp_reg_readl(isp
, OMAP3_ISP_IOMEM_MAIN
, ISP_SYSCONFIG
)
1228 | ISP_SYSCONFIG_SOFTRESET
,
1229 OMAP3_ISP_IOMEM_MAIN
, ISP_SYSCONFIG
);
1230 while (!(isp_reg_readl(isp
, OMAP3_ISP_IOMEM_MAIN
,
1231 ISP_SYSSTATUS
) & 0x1)) {
1232 if (timeout
++ > 10000) {
1233 dev_alert(isp
->dev
, "cannot reset ISP\n");
1239 isp
->stop_failure
= false;
1245 * isp_save_context - Saves the values of the ISP module registers.
1246 * @isp: OMAP3 ISP device
1247 * @reg_list: Structure containing pairs of register address and value to
1251 isp_save_context(struct isp_device
*isp
, struct isp_reg
*reg_list
)
1253 struct isp_reg
*next
= reg_list
;
1255 for (; next
->reg
!= ISP_TOK_TERM
; next
++)
1256 next
->val
= isp_reg_readl(isp
, next
->mmio_range
, next
->reg
);
1260 * isp_restore_context - Restores the values of the ISP module registers.
1261 * @isp: OMAP3 ISP device
1262 * @reg_list: Structure containing pairs of register address and value to
1266 isp_restore_context(struct isp_device
*isp
, struct isp_reg
*reg_list
)
1268 struct isp_reg
*next
= reg_list
;
1270 for (; next
->reg
!= ISP_TOK_TERM
; next
++)
1271 isp_reg_writel(isp
, next
->val
, next
->mmio_range
, next
->reg
);
1275 * isp_save_ctx - Saves ISP, CCDC, HIST, H3A, PREV, RESZ & MMU context.
1276 * @isp: OMAP3 ISP device
1278 * Routine for saving the context of each module in the ISP.
1279 * CCDC, HIST, H3A, PREV, RESZ and MMU.
1281 static void isp_save_ctx(struct isp_device
*isp
)
1283 isp_save_context(isp
, isp_reg_list
);
1284 omap_iommu_save_ctx(isp
->dev
);
1288 * isp_restore_ctx - Restores ISP, CCDC, HIST, H3A, PREV, RESZ & MMU context.
1289 * @isp: OMAP3 ISP device
1291 * Routine for restoring the context of each module in the ISP.
1292 * CCDC, HIST, H3A, PREV, RESZ and MMU.
1294 static void isp_restore_ctx(struct isp_device
*isp
)
1296 isp_restore_context(isp
, isp_reg_list
);
1297 omap_iommu_restore_ctx(isp
->dev
);
1298 omap3isp_ccdc_restore_context(isp
);
1299 omap3isp_preview_restore_context(isp
);
1302 /* -----------------------------------------------------------------------------
1303 * SBL resources management
1305 #define OMAP3_ISP_SBL_READ (OMAP3_ISP_SBL_CSI1_READ | \
1306 OMAP3_ISP_SBL_CCDC_LSC_READ | \
1307 OMAP3_ISP_SBL_PREVIEW_READ | \
1308 OMAP3_ISP_SBL_RESIZER_READ)
1309 #define OMAP3_ISP_SBL_WRITE (OMAP3_ISP_SBL_CSI1_WRITE | \
1310 OMAP3_ISP_SBL_CSI2A_WRITE | \
1311 OMAP3_ISP_SBL_CSI2C_WRITE | \
1312 OMAP3_ISP_SBL_CCDC_WRITE | \
1313 OMAP3_ISP_SBL_PREVIEW_WRITE)
1315 void omap3isp_sbl_enable(struct isp_device
*isp
, enum isp_sbl_resource res
)
1319 isp
->sbl_resources
|= res
;
1321 if (isp
->sbl_resources
& OMAP3_ISP_SBL_CSI1_READ
)
1322 sbl
|= ISPCTRL_SBL_SHARED_RPORTA
;
1324 if (isp
->sbl_resources
& OMAP3_ISP_SBL_CCDC_LSC_READ
)
1325 sbl
|= ISPCTRL_SBL_SHARED_RPORTB
;
1327 if (isp
->sbl_resources
& OMAP3_ISP_SBL_CSI2C_WRITE
)
1328 sbl
|= ISPCTRL_SBL_SHARED_WPORTC
;
1330 if (isp
->sbl_resources
& OMAP3_ISP_SBL_RESIZER_WRITE
)
1331 sbl
|= ISPCTRL_SBL_WR0_RAM_EN
;
1333 if (isp
->sbl_resources
& OMAP3_ISP_SBL_WRITE
)
1334 sbl
|= ISPCTRL_SBL_WR1_RAM_EN
;
1336 if (isp
->sbl_resources
& OMAP3_ISP_SBL_READ
)
1337 sbl
|= ISPCTRL_SBL_RD_RAM_EN
;
1339 isp_reg_set(isp
, OMAP3_ISP_IOMEM_MAIN
, ISP_CTRL
, sbl
);
1342 void omap3isp_sbl_disable(struct isp_device
*isp
, enum isp_sbl_resource res
)
1346 isp
->sbl_resources
&= ~res
;
1348 if (!(isp
->sbl_resources
& OMAP3_ISP_SBL_CSI1_READ
))
1349 sbl
|= ISPCTRL_SBL_SHARED_RPORTA
;
1351 if (!(isp
->sbl_resources
& OMAP3_ISP_SBL_CCDC_LSC_READ
))
1352 sbl
|= ISPCTRL_SBL_SHARED_RPORTB
;
1354 if (!(isp
->sbl_resources
& OMAP3_ISP_SBL_CSI2C_WRITE
))
1355 sbl
|= ISPCTRL_SBL_SHARED_WPORTC
;
1357 if (!(isp
->sbl_resources
& OMAP3_ISP_SBL_RESIZER_WRITE
))
1358 sbl
|= ISPCTRL_SBL_WR0_RAM_EN
;
1360 if (!(isp
->sbl_resources
& OMAP3_ISP_SBL_WRITE
))
1361 sbl
|= ISPCTRL_SBL_WR1_RAM_EN
;
1363 if (!(isp
->sbl_resources
& OMAP3_ISP_SBL_READ
))
1364 sbl
|= ISPCTRL_SBL_RD_RAM_EN
;
1366 isp_reg_clr(isp
, OMAP3_ISP_IOMEM_MAIN
, ISP_CTRL
, sbl
);
1370 * isp_module_sync_idle - Helper to sync module with its idle state
1371 * @me: ISP submodule's media entity
1372 * @wait: ISP submodule's wait queue for streamoff/interrupt synchronization
1373 * @stopping: flag which tells module wants to stop
1375 * This function checks if ISP submodule needs to wait for next interrupt. If
1376 * yes, makes the caller to sleep while waiting for such event.
1378 int omap3isp_module_sync_idle(struct media_entity
*me
, wait_queue_head_t
*wait
,
1381 struct isp_pipeline
*pipe
= to_isp_pipeline(me
);
1383 if (pipe
->stream_state
== ISP_PIPELINE_STREAM_STOPPED
||
1384 (pipe
->stream_state
== ISP_PIPELINE_STREAM_SINGLESHOT
&&
1385 !isp_pipeline_ready(pipe
)))
1389 * atomic_set() doesn't include memory barrier on ARM platform for SMP
1390 * scenario. We'll call it here to avoid race conditions.
1392 atomic_set(stopping
, 1);
1396 * If module is the last one, it's writing to memory. In this case,
1397 * it's necessary to check if the module is already paused due to
1398 * DMA queue underrun or if it has to wait for next interrupt to be
1400 * If it isn't the last one, the function won't sleep but *stopping
1401 * will still be set to warn next submodule caller's interrupt the
1402 * module wants to be idle.
1404 if (isp_pipeline_is_last(me
)) {
1405 struct isp_video
*video
= pipe
->output
;
1406 unsigned long flags
;
1407 spin_lock_irqsave(&video
->irqlock
, flags
);
1408 if (video
->dmaqueue_flags
& ISP_VIDEO_DMAQUEUE_UNDERRUN
) {
1409 spin_unlock_irqrestore(&video
->irqlock
, flags
);
1410 atomic_set(stopping
, 0);
1414 spin_unlock_irqrestore(&video
->irqlock
, flags
);
1415 if (!wait_event_timeout(*wait
, !atomic_read(stopping
),
1416 msecs_to_jiffies(1000))) {
1417 atomic_set(stopping
, 0);
1427 * omap3isp_module_sync_is_stopping - Helper to verify if module was stopping
1428 * @wait: ISP submodule's wait queue for streamoff/interrupt synchronization
1429 * @stopping: flag which tells module wants to stop
1431 * This function checks if ISP submodule was stopping. In case of yes, it
1432 * notices the caller by setting stopping to 0 and waking up the wait queue.
1433 * Returns 1 if it was stopping or 0 otherwise.
1435 int omap3isp_module_sync_is_stopping(wait_queue_head_t
*wait
,
1438 if (atomic_cmpxchg(stopping
, 1, 0)) {
1446 /* --------------------------------------------------------------------------
1450 #define ISPCTRL_CLKS_MASK (ISPCTRL_H3A_CLK_EN | \
1451 ISPCTRL_HIST_CLK_EN | \
1452 ISPCTRL_RSZ_CLK_EN | \
1453 (ISPCTRL_CCDC_CLK_EN | ISPCTRL_CCDC_RAM_EN) | \
1454 (ISPCTRL_PREV_CLK_EN | ISPCTRL_PREV_RAM_EN))
1456 static void __isp_subclk_update(struct isp_device
*isp
)
1460 /* AEWB and AF share the same clock. */
1461 if (isp
->subclk_resources
&
1462 (OMAP3_ISP_SUBCLK_AEWB
| OMAP3_ISP_SUBCLK_AF
))
1463 clk
|= ISPCTRL_H3A_CLK_EN
;
1465 if (isp
->subclk_resources
& OMAP3_ISP_SUBCLK_HIST
)
1466 clk
|= ISPCTRL_HIST_CLK_EN
;
1468 if (isp
->subclk_resources
& OMAP3_ISP_SUBCLK_RESIZER
)
1469 clk
|= ISPCTRL_RSZ_CLK_EN
;
1471 /* NOTE: For CCDC & Preview submodules, we need to affect internal
1474 if (isp
->subclk_resources
& OMAP3_ISP_SUBCLK_CCDC
)
1475 clk
|= ISPCTRL_CCDC_CLK_EN
| ISPCTRL_CCDC_RAM_EN
;
1477 if (isp
->subclk_resources
& OMAP3_ISP_SUBCLK_PREVIEW
)
1478 clk
|= ISPCTRL_PREV_CLK_EN
| ISPCTRL_PREV_RAM_EN
;
1480 isp_reg_clr_set(isp
, OMAP3_ISP_IOMEM_MAIN
, ISP_CTRL
,
1481 ISPCTRL_CLKS_MASK
, clk
);
1484 void omap3isp_subclk_enable(struct isp_device
*isp
,
1485 enum isp_subclk_resource res
)
1487 isp
->subclk_resources
|= res
;
1489 __isp_subclk_update(isp
);
1492 void omap3isp_subclk_disable(struct isp_device
*isp
,
1493 enum isp_subclk_resource res
)
1495 isp
->subclk_resources
&= ~res
;
1497 __isp_subclk_update(isp
);
1501 * isp_enable_clocks - Enable ISP clocks
1502 * @isp: OMAP3 ISP device
1504 * Return 0 if successful, or clk_prepare_enable return value if any of them
1507 static int isp_enable_clocks(struct isp_device
*isp
)
1512 r
= clk_prepare_enable(isp
->clock
[ISP_CLK_CAM_ICK
]);
1514 dev_err(isp
->dev
, "failed to enable cam_ick clock\n");
1515 goto out_clk_enable_ick
;
1517 r
= clk_set_rate(isp
->clock
[ISP_CLK_CAM_MCLK
], CM_CAM_MCLK_HZ
);
1519 dev_err(isp
->dev
, "clk_set_rate for cam_mclk failed\n");
1520 goto out_clk_enable_mclk
;
1522 r
= clk_prepare_enable(isp
->clock
[ISP_CLK_CAM_MCLK
]);
1524 dev_err(isp
->dev
, "failed to enable cam_mclk clock\n");
1525 goto out_clk_enable_mclk
;
1527 rate
= clk_get_rate(isp
->clock
[ISP_CLK_CAM_MCLK
]);
1528 if (rate
!= CM_CAM_MCLK_HZ
)
1529 dev_warn(isp
->dev
, "unexpected cam_mclk rate:\n"
1531 " actual : %ld\n", CM_CAM_MCLK_HZ
, rate
);
1532 r
= clk_prepare_enable(isp
->clock
[ISP_CLK_CSI2_FCK
]);
1534 dev_err(isp
->dev
, "failed to enable csi2_fck clock\n");
1535 goto out_clk_enable_csi2_fclk
;
1539 out_clk_enable_csi2_fclk
:
1540 clk_disable_unprepare(isp
->clock
[ISP_CLK_CAM_MCLK
]);
1541 out_clk_enable_mclk
:
1542 clk_disable_unprepare(isp
->clock
[ISP_CLK_CAM_ICK
]);
1548 * isp_disable_clocks - Disable ISP clocks
1549 * @isp: OMAP3 ISP device
1551 static void isp_disable_clocks(struct isp_device
*isp
)
1553 clk_disable_unprepare(isp
->clock
[ISP_CLK_CAM_ICK
]);
1554 clk_disable_unprepare(isp
->clock
[ISP_CLK_CAM_MCLK
]);
1555 clk_disable_unprepare(isp
->clock
[ISP_CLK_CSI2_FCK
]);
1558 static const char *isp_clocks
[] = {
1565 static int isp_get_clocks(struct isp_device
*isp
)
1570 for (i
= 0; i
< ARRAY_SIZE(isp_clocks
); ++i
) {
1571 clk
= devm_clk_get(isp
->dev
, isp_clocks
[i
]);
1573 dev_err(isp
->dev
, "clk_get %s failed\n", isp_clocks
[i
]);
1574 return PTR_ERR(clk
);
1577 isp
->clock
[i
] = clk
;
1584 * omap3isp_get - Acquire the ISP resource.
1586 * Initializes the clocks for the first acquire.
1588 * Increment the reference count on the ISP. If the first reference is taken,
1589 * enable clocks and power-up all submodules.
1591 * Return a pointer to the ISP device structure, or NULL if an error occurred.
1593 static struct isp_device
*__omap3isp_get(struct isp_device
*isp
, bool irq
)
1595 struct isp_device
*__isp
= isp
;
1600 mutex_lock(&isp
->isp_mutex
);
1601 if (isp
->ref_count
> 0)
1604 if (isp_enable_clocks(isp
) < 0) {
1609 /* We don't want to restore context before saving it! */
1610 if (isp
->has_context
)
1611 isp_restore_ctx(isp
);
1614 isp_enable_interrupts(isp
);
1619 mutex_unlock(&isp
->isp_mutex
);
1624 struct isp_device
*omap3isp_get(struct isp_device
*isp
)
1626 return __omap3isp_get(isp
, true);
1630 * omap3isp_put - Release the ISP
1632 * Decrement the reference count on the ISP. If the last reference is released,
1633 * power-down all submodules, disable clocks and free temporary buffers.
1635 static void __omap3isp_put(struct isp_device
*isp
, bool save_ctx
)
1640 mutex_lock(&isp
->isp_mutex
);
1641 BUG_ON(isp
->ref_count
== 0);
1642 if (--isp
->ref_count
== 0) {
1643 isp_disable_interrupts(isp
);
1646 isp
->has_context
= 1;
1648 /* Reset the ISP if an entity has failed to stop. This is the
1649 * only way to recover from such conditions.
1651 if (isp
->crashed
|| isp
->stop_failure
)
1653 isp_disable_clocks(isp
);
1655 mutex_unlock(&isp
->isp_mutex
);
1658 void omap3isp_put(struct isp_device
*isp
)
1660 __omap3isp_put(isp
, true);
1663 /* --------------------------------------------------------------------------
1664 * Platform device driver
1668 * omap3isp_print_status - Prints the values of the ISP Control Module registers
1669 * @isp: OMAP3 ISP device
1671 #define ISP_PRINT_REGISTER(isp, name)\
1672 dev_dbg(isp->dev, "###ISP " #name "=0x%08x\n", \
1673 isp_reg_readl(isp, OMAP3_ISP_IOMEM_MAIN, ISP_##name))
1674 #define SBL_PRINT_REGISTER(isp, name)\
1675 dev_dbg(isp->dev, "###SBL " #name "=0x%08x\n", \
1676 isp_reg_readl(isp, OMAP3_ISP_IOMEM_SBL, ISPSBL_##name))
1678 void omap3isp_print_status(struct isp_device
*isp
)
1680 dev_dbg(isp
->dev
, "-------------ISP Register dump--------------\n");
1682 ISP_PRINT_REGISTER(isp
, SYSCONFIG
);
1683 ISP_PRINT_REGISTER(isp
, SYSSTATUS
);
1684 ISP_PRINT_REGISTER(isp
, IRQ0ENABLE
);
1685 ISP_PRINT_REGISTER(isp
, IRQ0STATUS
);
1686 ISP_PRINT_REGISTER(isp
, TCTRL_GRESET_LENGTH
);
1687 ISP_PRINT_REGISTER(isp
, TCTRL_PSTRB_REPLAY
);
1688 ISP_PRINT_REGISTER(isp
, CTRL
);
1689 ISP_PRINT_REGISTER(isp
, TCTRL_CTRL
);
1690 ISP_PRINT_REGISTER(isp
, TCTRL_FRAME
);
1691 ISP_PRINT_REGISTER(isp
, TCTRL_PSTRB_DELAY
);
1692 ISP_PRINT_REGISTER(isp
, TCTRL_STRB_DELAY
);
1693 ISP_PRINT_REGISTER(isp
, TCTRL_SHUT_DELAY
);
1694 ISP_PRINT_REGISTER(isp
, TCTRL_PSTRB_LENGTH
);
1695 ISP_PRINT_REGISTER(isp
, TCTRL_STRB_LENGTH
);
1696 ISP_PRINT_REGISTER(isp
, TCTRL_SHUT_LENGTH
);
1698 SBL_PRINT_REGISTER(isp
, PCR
);
1699 SBL_PRINT_REGISTER(isp
, SDR_REQ_EXP
);
1701 dev_dbg(isp
->dev
, "--------------------------------------------\n");
1707 * Power management support.
1709 * As the ISP can't properly handle an input video stream interruption on a non
1710 * frame boundary, the ISP pipelines need to be stopped before sensors get
1711 * suspended. However, as suspending the sensors can require a running clock,
1712 * which can be provided by the ISP, the ISP can't be completely suspended
1713 * before the sensor.
1715 * To solve this problem power management support is split into prepare/complete
1716 * and suspend/resume operations. The pipelines are stopped in prepare() and the
1717 * ISP clocks get disabled in suspend(). Similarly, the clocks are reenabled in
1718 * resume(), and the the pipelines are restarted in complete().
1720 * TODO: PM dependencies between the ISP and sensors are not modelled explicitly
1723 static int isp_pm_prepare(struct device
*dev
)
1725 struct isp_device
*isp
= dev_get_drvdata(dev
);
1728 WARN_ON(mutex_is_locked(&isp
->isp_mutex
));
1730 if (isp
->ref_count
== 0)
1733 reset
= isp_suspend_modules(isp
);
1734 isp_disable_interrupts(isp
);
1742 static int isp_pm_suspend(struct device
*dev
)
1744 struct isp_device
*isp
= dev_get_drvdata(dev
);
1746 WARN_ON(mutex_is_locked(&isp
->isp_mutex
));
1749 isp_disable_clocks(isp
);
1754 static int isp_pm_resume(struct device
*dev
)
1756 struct isp_device
*isp
= dev_get_drvdata(dev
);
1758 if (isp
->ref_count
== 0)
1761 return isp_enable_clocks(isp
);
1764 static void isp_pm_complete(struct device
*dev
)
1766 struct isp_device
*isp
= dev_get_drvdata(dev
);
1768 if (isp
->ref_count
== 0)
1771 isp_restore_ctx(isp
);
1772 isp_enable_interrupts(isp
);
1773 isp_resume_modules(isp
);
1778 #define isp_pm_prepare NULL
1779 #define isp_pm_suspend NULL
1780 #define isp_pm_resume NULL
1781 #define isp_pm_complete NULL
1783 #endif /* CONFIG_PM */
1785 static void isp_unregister_entities(struct isp_device
*isp
)
1787 omap3isp_csi2_unregister_entities(&isp
->isp_csi2a
);
1788 omap3isp_ccp2_unregister_entities(&isp
->isp_ccp2
);
1789 omap3isp_ccdc_unregister_entities(&isp
->isp_ccdc
);
1790 omap3isp_preview_unregister_entities(&isp
->isp_prev
);
1791 omap3isp_resizer_unregister_entities(&isp
->isp_res
);
1792 omap3isp_stat_unregister_entities(&isp
->isp_aewb
);
1793 omap3isp_stat_unregister_entities(&isp
->isp_af
);
1794 omap3isp_stat_unregister_entities(&isp
->isp_hist
);
1796 v4l2_device_unregister(&isp
->v4l2_dev
);
1797 media_device_unregister(&isp
->media_dev
);
1800 static int isp_link_entity(
1801 struct isp_device
*isp
, struct media_entity
*entity
,
1802 enum isp_interface_type interface
)
1804 struct media_entity
*input
;
1809 /* Connect the sensor to the correct interface module.
1810 * Parallel sensors are connected directly to the CCDC, while
1811 * serial sensors are connected to the CSI2a, CCP2b or CSI2c
1812 * receiver through CSIPHY1 or CSIPHY2.
1814 switch (interface
) {
1815 case ISP_INTERFACE_PARALLEL
:
1816 input
= &isp
->isp_ccdc
.subdev
.entity
;
1817 pad
= CCDC_PAD_SINK
;
1821 case ISP_INTERFACE_CSI2A_PHY2
:
1822 input
= &isp
->isp_csi2a
.subdev
.entity
;
1823 pad
= CSI2_PAD_SINK
;
1824 flags
= MEDIA_LNK_FL_IMMUTABLE
| MEDIA_LNK_FL_ENABLED
;
1827 case ISP_INTERFACE_CCP2B_PHY1
:
1828 case ISP_INTERFACE_CCP2B_PHY2
:
1829 input
= &isp
->isp_ccp2
.subdev
.entity
;
1830 pad
= CCP2_PAD_SINK
;
1834 case ISP_INTERFACE_CSI2C_PHY1
:
1835 input
= &isp
->isp_csi2c
.subdev
.entity
;
1836 pad
= CSI2_PAD_SINK
;
1837 flags
= MEDIA_LNK_FL_IMMUTABLE
| MEDIA_LNK_FL_ENABLED
;
1841 dev_err(isp
->dev
, "%s: invalid interface type %u\n", __func__
,
1847 * Not all interfaces are available on all revisions of the
1848 * ISP. The sub-devices of those interfaces aren't initialised
1849 * in such a case. Check this by ensuring the num_pads is
1852 if (!input
->num_pads
) {
1853 dev_err(isp
->dev
, "%s: invalid input %u\n", entity
->name
,
1858 for (i
= 0; i
< entity
->num_pads
; i
++) {
1859 if (entity
->pads
[i
].flags
& MEDIA_PAD_FL_SOURCE
)
1862 if (i
== entity
->num_pads
) {
1863 dev_err(isp
->dev
, "%s: no source pad in external entity\n",
1868 return media_create_pad_link(entity
, i
, input
, pad
, flags
);
1871 static int isp_register_entities(struct isp_device
*isp
)
1875 isp
->media_dev
.dev
= isp
->dev
;
1876 strlcpy(isp
->media_dev
.model
, "TI OMAP3 ISP",
1877 sizeof(isp
->media_dev
.model
));
1878 isp
->media_dev
.hw_revision
= isp
->revision
;
1879 isp
->media_dev
.link_notify
= isp_pipeline_link_notify
;
1880 ret
= media_device_register(&isp
->media_dev
);
1882 dev_err(isp
->dev
, "%s: Media device registration failed (%d)\n",
1887 isp
->v4l2_dev
.mdev
= &isp
->media_dev
;
1888 ret
= v4l2_device_register(isp
->dev
, &isp
->v4l2_dev
);
1890 dev_err(isp
->dev
, "%s: V4L2 device registration failed (%d)\n",
1895 /* Register internal entities */
1896 ret
= omap3isp_ccp2_register_entities(&isp
->isp_ccp2
, &isp
->v4l2_dev
);
1900 ret
= omap3isp_csi2_register_entities(&isp
->isp_csi2a
, &isp
->v4l2_dev
);
1904 ret
= omap3isp_ccdc_register_entities(&isp
->isp_ccdc
, &isp
->v4l2_dev
);
1908 ret
= omap3isp_preview_register_entities(&isp
->isp_prev
,
1913 ret
= omap3isp_resizer_register_entities(&isp
->isp_res
, &isp
->v4l2_dev
);
1917 ret
= omap3isp_stat_register_entities(&isp
->isp_aewb
, &isp
->v4l2_dev
);
1921 ret
= omap3isp_stat_register_entities(&isp
->isp_af
, &isp
->v4l2_dev
);
1925 ret
= omap3isp_stat_register_entities(&isp
->isp_hist
, &isp
->v4l2_dev
);
1931 isp_unregister_entities(isp
);
1936 static void isp_cleanup_modules(struct isp_device
*isp
)
1938 omap3isp_h3a_aewb_cleanup(isp
);
1939 omap3isp_h3a_af_cleanup(isp
);
1940 omap3isp_hist_cleanup(isp
);
1941 omap3isp_resizer_cleanup(isp
);
1942 omap3isp_preview_cleanup(isp
);
1943 omap3isp_ccdc_cleanup(isp
);
1944 omap3isp_ccp2_cleanup(isp
);
1945 omap3isp_csi2_cleanup(isp
);
1948 static int isp_initialize_modules(struct isp_device
*isp
)
1952 ret
= omap3isp_csiphy_init(isp
);
1954 dev_err(isp
->dev
, "CSI PHY initialization failed\n");
1958 ret
= omap3isp_csi2_init(isp
);
1960 dev_err(isp
->dev
, "CSI2 initialization failed\n");
1964 ret
= omap3isp_ccp2_init(isp
);
1966 dev_err(isp
->dev
, "CCP2 initialization failed\n");
1970 ret
= omap3isp_ccdc_init(isp
);
1972 dev_err(isp
->dev
, "CCDC initialization failed\n");
1976 ret
= omap3isp_preview_init(isp
);
1978 dev_err(isp
->dev
, "Preview initialization failed\n");
1982 ret
= omap3isp_resizer_init(isp
);
1984 dev_err(isp
->dev
, "Resizer initialization failed\n");
1988 ret
= omap3isp_hist_init(isp
);
1990 dev_err(isp
->dev
, "Histogram initialization failed\n");
1994 ret
= omap3isp_h3a_aewb_init(isp
);
1996 dev_err(isp
->dev
, "H3A AEWB initialization failed\n");
1997 goto error_h3a_aewb
;
2000 ret
= omap3isp_h3a_af_init(isp
);
2002 dev_err(isp
->dev
, "H3A AF initialization failed\n");
2006 /* Connect the submodules. */
2007 ret
= media_create_pad_link(
2008 &isp
->isp_csi2a
.subdev
.entity
, CSI2_PAD_SOURCE
,
2009 &isp
->isp_ccdc
.subdev
.entity
, CCDC_PAD_SINK
, 0);
2013 ret
= media_create_pad_link(
2014 &isp
->isp_ccp2
.subdev
.entity
, CCP2_PAD_SOURCE
,
2015 &isp
->isp_ccdc
.subdev
.entity
, CCDC_PAD_SINK
, 0);
2019 ret
= media_create_pad_link(
2020 &isp
->isp_ccdc
.subdev
.entity
, CCDC_PAD_SOURCE_VP
,
2021 &isp
->isp_prev
.subdev
.entity
, PREV_PAD_SINK
, 0);
2025 ret
= media_create_pad_link(
2026 &isp
->isp_ccdc
.subdev
.entity
, CCDC_PAD_SOURCE_OF
,
2027 &isp
->isp_res
.subdev
.entity
, RESZ_PAD_SINK
, 0);
2031 ret
= media_create_pad_link(
2032 &isp
->isp_prev
.subdev
.entity
, PREV_PAD_SOURCE
,
2033 &isp
->isp_res
.subdev
.entity
, RESZ_PAD_SINK
, 0);
2037 ret
= media_create_pad_link(
2038 &isp
->isp_ccdc
.subdev
.entity
, CCDC_PAD_SOURCE_VP
,
2039 &isp
->isp_aewb
.subdev
.entity
, 0,
2040 MEDIA_LNK_FL_ENABLED
| MEDIA_LNK_FL_IMMUTABLE
);
2044 ret
= media_create_pad_link(
2045 &isp
->isp_ccdc
.subdev
.entity
, CCDC_PAD_SOURCE_VP
,
2046 &isp
->isp_af
.subdev
.entity
, 0,
2047 MEDIA_LNK_FL_ENABLED
| MEDIA_LNK_FL_IMMUTABLE
);
2051 ret
= media_create_pad_link(
2052 &isp
->isp_ccdc
.subdev
.entity
, CCDC_PAD_SOURCE_VP
,
2053 &isp
->isp_hist
.subdev
.entity
, 0,
2054 MEDIA_LNK_FL_ENABLED
| MEDIA_LNK_FL_IMMUTABLE
);
2061 omap3isp_h3a_af_cleanup(isp
);
2063 omap3isp_h3a_aewb_cleanup(isp
);
2065 omap3isp_hist_cleanup(isp
);
2067 omap3isp_resizer_cleanup(isp
);
2069 omap3isp_preview_cleanup(isp
);
2071 omap3isp_ccdc_cleanup(isp
);
2073 omap3isp_ccp2_cleanup(isp
);
2075 omap3isp_csi2_cleanup(isp
);
2081 static void isp_detach_iommu(struct isp_device
*isp
)
2083 arm_iommu_release_mapping(isp
->mapping
);
2084 isp
->mapping
= NULL
;
2085 iommu_group_remove_device(isp
->dev
);
2088 static int isp_attach_iommu(struct isp_device
*isp
)
2090 struct dma_iommu_mapping
*mapping
;
2091 struct iommu_group
*group
;
2094 /* Create a device group and add the device to it. */
2095 group
= iommu_group_alloc();
2096 if (IS_ERR(group
)) {
2097 dev_err(isp
->dev
, "failed to allocate IOMMU group\n");
2098 return PTR_ERR(group
);
2101 ret
= iommu_group_add_device(group
, isp
->dev
);
2102 iommu_group_put(group
);
2105 dev_err(isp
->dev
, "failed to add device to IPMMU group\n");
2110 * Create the ARM mapping, used by the ARM DMA mapping core to allocate
2111 * VAs. This will allocate a corresponding IOMMU domain.
2113 mapping
= arm_iommu_create_mapping(&platform_bus_type
, SZ_1G
, SZ_2G
);
2114 if (IS_ERR(mapping
)) {
2115 dev_err(isp
->dev
, "failed to create ARM IOMMU mapping\n");
2116 ret
= PTR_ERR(mapping
);
2120 isp
->mapping
= mapping
;
2122 /* Attach the ARM VA mapping to the device. */
2123 ret
= arm_iommu_attach_device(isp
->dev
, mapping
);
2125 dev_err(isp
->dev
, "failed to attach device to VA mapping\n");
2132 isp_detach_iommu(isp
);
2137 * isp_remove - Remove ISP platform device
2138 * @pdev: Pointer to ISP platform device
2142 static int isp_remove(struct platform_device
*pdev
)
2144 struct isp_device
*isp
= platform_get_drvdata(pdev
);
2146 v4l2_async_notifier_unregister(&isp
->notifier
);
2147 isp_unregister_entities(isp
);
2148 isp_cleanup_modules(isp
);
2149 isp_xclk_cleanup(isp
);
2151 __omap3isp_get(isp
, false);
2152 isp_detach_iommu(isp
);
2153 __omap3isp_put(isp
, false);
2159 ISP_OF_PHY_PARALLEL
= 0,
2164 static int isp_of_parse_node(struct device
*dev
, struct device_node
*node
,
2165 struct isp_async_subdev
*isd
)
2167 struct isp_bus_cfg
*buscfg
= &isd
->bus
;
2168 struct v4l2_of_endpoint vep
;
2171 v4l2_of_parse_endpoint(node
, &vep
);
2173 dev_dbg(dev
, "parsing endpoint %s, interface %u\n", node
->full_name
,
2176 switch (vep
.base
.port
) {
2177 case ISP_OF_PHY_PARALLEL
:
2178 buscfg
->interface
= ISP_INTERFACE_PARALLEL
;
2179 buscfg
->bus
.parallel
.data_lane_shift
=
2180 vep
.bus
.parallel
.data_shift
;
2181 buscfg
->bus
.parallel
.clk_pol
=
2182 !!(vep
.bus
.parallel
.flags
2183 & V4L2_MBUS_PCLK_SAMPLE_FALLING
);
2184 buscfg
->bus
.parallel
.hs_pol
=
2185 !!(vep
.bus
.parallel
.flags
& V4L2_MBUS_VSYNC_ACTIVE_LOW
);
2186 buscfg
->bus
.parallel
.vs_pol
=
2187 !!(vep
.bus
.parallel
.flags
& V4L2_MBUS_HSYNC_ACTIVE_LOW
);
2188 buscfg
->bus
.parallel
.fld_pol
=
2189 !!(vep
.bus
.parallel
.flags
& V4L2_MBUS_FIELD_EVEN_LOW
);
2190 buscfg
->bus
.parallel
.data_pol
=
2191 !!(vep
.bus
.parallel
.flags
& V4L2_MBUS_DATA_ACTIVE_LOW
);
2194 case ISP_OF_PHY_CSIPHY1
:
2195 case ISP_OF_PHY_CSIPHY2
:
2196 /* FIXME: always assume CSI-2 for now. */
2197 switch (vep
.base
.port
) {
2198 case ISP_OF_PHY_CSIPHY1
:
2199 buscfg
->interface
= ISP_INTERFACE_CSI2C_PHY1
;
2201 case ISP_OF_PHY_CSIPHY2
:
2202 buscfg
->interface
= ISP_INTERFACE_CSI2A_PHY2
;
2205 buscfg
->bus
.csi2
.lanecfg
.clk
.pos
= vep
.bus
.mipi_csi2
.clock_lane
;
2206 buscfg
->bus
.csi2
.lanecfg
.clk
.pol
=
2207 vep
.bus
.mipi_csi2
.lane_polarities
[0];
2208 dev_dbg(dev
, "clock lane polarity %u, pos %u\n",
2209 buscfg
->bus
.csi2
.lanecfg
.clk
.pol
,
2210 buscfg
->bus
.csi2
.lanecfg
.clk
.pos
);
2212 for (i
= 0; i
< ISP_CSIPHY2_NUM_DATA_LANES
; i
++) {
2213 buscfg
->bus
.csi2
.lanecfg
.data
[i
].pos
=
2214 vep
.bus
.mipi_csi2
.data_lanes
[i
];
2215 buscfg
->bus
.csi2
.lanecfg
.data
[i
].pol
=
2216 vep
.bus
.mipi_csi2
.lane_polarities
[i
+ 1];
2217 dev_dbg(dev
, "data lane %u polarity %u, pos %u\n", i
,
2218 buscfg
->bus
.csi2
.lanecfg
.data
[i
].pol
,
2219 buscfg
->bus
.csi2
.lanecfg
.data
[i
].pos
);
2223 * FIXME: now we assume the CRC is always there.
2224 * Implement a way to obtain this information from the
2225 * sensor. Frame descriptors, perhaps?
2227 buscfg
->bus
.csi2
.crc
= 1;
2231 dev_warn(dev
, "%s: invalid interface %u\n", node
->full_name
,
2239 static int isp_of_parse_nodes(struct device
*dev
,
2240 struct v4l2_async_notifier
*notifier
)
2242 struct device_node
*node
= NULL
;
2244 notifier
->subdevs
= devm_kcalloc(
2245 dev
, ISP_MAX_SUBDEVS
, sizeof(*notifier
->subdevs
), GFP_KERNEL
);
2246 if (!notifier
->subdevs
)
2249 while (notifier
->num_subdevs
< ISP_MAX_SUBDEVS
&&
2250 (node
= of_graph_get_next_endpoint(dev
->of_node
, node
))) {
2251 struct isp_async_subdev
*isd
;
2253 isd
= devm_kzalloc(dev
, sizeof(*isd
), GFP_KERNEL
);
2259 notifier
->subdevs
[notifier
->num_subdevs
] = &isd
->asd
;
2261 if (isp_of_parse_node(dev
, node
, isd
)) {
2266 isd
->asd
.match
.of
.node
= of_graph_get_remote_port_parent(node
);
2268 if (!isd
->asd
.match
.of
.node
) {
2269 dev_warn(dev
, "bad remote port parent\n");
2273 isd
->asd
.match_type
= V4L2_ASYNC_MATCH_OF
;
2274 notifier
->num_subdevs
++;
2277 return notifier
->num_subdevs
;
2280 static int isp_subdev_notifier_bound(struct v4l2_async_notifier
*async
,
2281 struct v4l2_subdev
*subdev
,
2282 struct v4l2_async_subdev
*asd
)
2284 struct isp_device
*isp
= container_of(async
, struct isp_device
,
2286 struct isp_async_subdev
*isd
=
2287 container_of(asd
, struct isp_async_subdev
, asd
);
2290 ret
= isp_link_entity(isp
, &subdev
->entity
, isd
->bus
.interface
);
2295 isd
->sd
->host_priv
= &isd
->bus
;
2300 static int isp_subdev_notifier_complete(struct v4l2_async_notifier
*async
)
2302 struct isp_device
*isp
= container_of(async
, struct isp_device
,
2305 return v4l2_device_register_subdev_nodes(&isp
->v4l2_dev
);
2309 * isp_probe - Probe ISP platform device
2310 * @pdev: Pointer to ISP platform device
2312 * Returns 0 if successful,
2313 * -ENOMEM if no memory available,
2314 * -ENODEV if no platform device resources found
2315 * or no space for remapping registers,
2316 * -EINVAL if couldn't install ISR,
2317 * or clk_get return error value.
2319 static int isp_probe(struct platform_device
*pdev
)
2321 struct isp_device
*isp
;
2322 struct resource
*mem
;
2326 isp
= devm_kzalloc(&pdev
->dev
, sizeof(*isp
), GFP_KERNEL
);
2328 dev_err(&pdev
->dev
, "could not allocate memory\n");
2332 ret
= of_property_read_u32(pdev
->dev
.of_node
, "ti,phy-type",
2337 isp
->syscon
= syscon_regmap_lookup_by_phandle(pdev
->dev
.of_node
,
2339 if (IS_ERR(isp
->syscon
))
2340 return PTR_ERR(isp
->syscon
);
2342 ret
= of_property_read_u32_index(pdev
->dev
.of_node
, "syscon", 1,
2343 &isp
->syscon_offset
);
2347 ret
= isp_of_parse_nodes(&pdev
->dev
, &isp
->notifier
);
2351 isp
->autoidle
= autoidle
;
2353 mutex_init(&isp
->isp_mutex
);
2354 spin_lock_init(&isp
->stat_lock
);
2356 isp
->dev
= &pdev
->dev
;
2359 ret
= dma_coerce_mask_and_coherent(isp
->dev
, DMA_BIT_MASK(32));
2363 platform_set_drvdata(pdev
, isp
);
2366 isp
->isp_csiphy1
.vdd
= devm_regulator_get(&pdev
->dev
, "vdd-csiphy1");
2367 isp
->isp_csiphy2
.vdd
= devm_regulator_get(&pdev
->dev
, "vdd-csiphy2");
2371 * The ISP clock tree is revision-dependent. We thus need to enable ICLK
2372 * manually to read the revision before calling __omap3isp_get().
2374 * Start by mapping the ISP MMIO area, which is in two pieces.
2375 * The ISP IOMMU is in between. Map both now, and fill in the
2376 * ISP revision specific portions a little later in the
2379 for (i
= 0; i
< 2; i
++) {
2380 unsigned int map_idx
= i
? OMAP3_ISP_IOMEM_CSI2A_REGS1
: 0;
2382 mem
= platform_get_resource(pdev
, IORESOURCE_MEM
, i
);
2383 isp
->mmio_base
[map_idx
] =
2384 devm_ioremap_resource(isp
->dev
, mem
);
2385 if (IS_ERR(isp
->mmio_base
[map_idx
]))
2386 return PTR_ERR(isp
->mmio_base
[map_idx
]);
2389 ret
= isp_get_clocks(isp
);
2393 ret
= clk_enable(isp
->clock
[ISP_CLK_CAM_ICK
]);
2397 isp
->revision
= isp_reg_readl(isp
, OMAP3_ISP_IOMEM_MAIN
, ISP_REVISION
);
2398 dev_info(isp
->dev
, "Revision %d.%d found\n",
2399 (isp
->revision
& 0xf0) >> 4, isp
->revision
& 0x0f);
2401 clk_disable(isp
->clock
[ISP_CLK_CAM_ICK
]);
2403 if (__omap3isp_get(isp
, false) == NULL
) {
2408 ret
= isp_reset(isp
);
2412 ret
= isp_xclk_init(isp
);
2416 /* Memory resources */
2417 for (m
= 0; m
< ARRAY_SIZE(isp_res_maps
); m
++)
2418 if (isp
->revision
== isp_res_maps
[m
].isp_rev
)
2421 if (m
== ARRAY_SIZE(isp_res_maps
)) {
2422 dev_err(isp
->dev
, "No resource map found for ISP rev %d.%d\n",
2423 (isp
->revision
& 0xf0) >> 4, isp
->revision
& 0xf);
2428 for (i
= 1; i
< OMAP3_ISP_IOMEM_CSI2A_REGS1
; i
++)
2430 isp
->mmio_base
[0] + isp_res_maps
[m
].offset
[i
];
2432 for (i
= OMAP3_ISP_IOMEM_CSIPHY2
; i
< OMAP3_ISP_IOMEM_LAST
; i
++)
2434 isp
->mmio_base
[OMAP3_ISP_IOMEM_CSI2A_REGS1
]
2435 + isp_res_maps
[m
].offset
[i
];
2437 isp
->mmio_hist_base_phys
=
2438 mem
->start
+ isp_res_maps
[m
].offset
[OMAP3_ISP_IOMEM_HIST
];
2441 ret
= isp_attach_iommu(isp
);
2443 dev_err(&pdev
->dev
, "unable to attach to IOMMU\n");
2448 isp
->irq_num
= platform_get_irq(pdev
, 0);
2449 if (isp
->irq_num
<= 0) {
2450 dev_err(isp
->dev
, "No IRQ resource\n");
2455 if (devm_request_irq(isp
->dev
, isp
->irq_num
, isp_isr
, IRQF_SHARED
,
2456 "OMAP3 ISP", isp
)) {
2457 dev_err(isp
->dev
, "Unable to request IRQ\n");
2463 ret
= isp_initialize_modules(isp
);
2467 ret
= isp_register_entities(isp
);
2471 isp
->notifier
.bound
= isp_subdev_notifier_bound
;
2472 isp
->notifier
.complete
= isp_subdev_notifier_complete
;
2474 ret
= v4l2_async_notifier_register(&isp
->v4l2_dev
, &isp
->notifier
);
2476 goto error_register_entities
;
2478 isp_core_init(isp
, 1);
2483 error_register_entities
:
2484 isp_unregister_entities(isp
);
2486 isp_cleanup_modules(isp
);
2488 isp_detach_iommu(isp
);
2490 isp_xclk_cleanup(isp
);
2491 __omap3isp_put(isp
, false);
2493 mutex_destroy(&isp
->isp_mutex
);
2498 static const struct dev_pm_ops omap3isp_pm_ops
= {
2499 .prepare
= isp_pm_prepare
,
2500 .suspend
= isp_pm_suspend
,
2501 .resume
= isp_pm_resume
,
2502 .complete
= isp_pm_complete
,
2505 static struct platform_device_id omap3isp_id_table
[] = {
2509 MODULE_DEVICE_TABLE(platform
, omap3isp_id_table
);
2511 static const struct of_device_id omap3isp_of_table
[] = {
2512 { .compatible
= "ti,omap3-isp" },
2516 static struct platform_driver omap3isp_driver
= {
2518 .remove
= isp_remove
,
2519 .id_table
= omap3isp_id_table
,
2522 .pm
= &omap3isp_pm_ops
,
2523 .of_match_table
= omap3isp_of_table
,
2527 module_platform_driver(omap3isp_driver
);
2529 MODULE_AUTHOR("Nokia Corporation");
2530 MODULE_DESCRIPTION("TI OMAP3 ISP driver");
2531 MODULE_LICENSE("GPL");
2532 MODULE_VERSION(ISP_VIDEO_DRIVER_VERSION
);