1 /*
2 * TI OMAP4 ISS V4L2 Driver
3 *
4 * Copyright (C) 2012 Texas Instruments.
5 *
6 * Author: Sergio Aguirre <sergio.a.aguirre@gmail.com>
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
12 */
13
14 #ifndef _OMAP4_ISS_H_
15 #define _OMAP4_ISS_H_
16
17 #include <media/v4l2-device.h>
18 #include <linux/device.h>
19 #include <linux/io.h>
20 #include <linux/platform_device.h>
21 #include <linux/wait.h>
22
23 #include <media/omap4iss.h>
24
25 #include "iss_regs.h"
26 #include "iss_csiphy.h"
27 #include "iss_csi2.h"
28 #include "iss_ipipeif.h"
29 #include "iss_ipipe.h"
30 #include "iss_resizer.h"
31
32 #define to_iss_device(ptr_module) \
33 container_of(ptr_module, struct iss_device, ptr_module)
34 #define to_device(ptr_module) \
35 (to_iss_device(ptr_module)->dev)
36
37 enum iss_mem_resources {
38 OMAP4_ISS_MEM_TOP,
39 OMAP4_ISS_MEM_CSI2_A_REGS1,
40 OMAP4_ISS_MEM_CAMERARX_CORE1,
41 OMAP4_ISS_MEM_CSI2_B_REGS1,
42 OMAP4_ISS_MEM_CAMERARX_CORE2,
43 OMAP4_ISS_MEM_BTE,
44 OMAP4_ISS_MEM_ISP_SYS1,
45 OMAP4_ISS_MEM_ISP_RESIZER,
46 OMAP4_ISS_MEM_ISP_IPIPE,
47 OMAP4_ISS_MEM_ISP_ISIF,
48 OMAP4_ISS_MEM_ISP_IPIPEIF,
49 OMAP4_ISS_MEM_LAST,
50 };
51
52 enum iss_subclk_resource {
53 OMAP4_ISS_SUBCLK_SIMCOP = (1 << 0),
54 OMAP4_ISS_SUBCLK_ISP = (1 << 1),
55 OMAP4_ISS_SUBCLK_CSI2_A = (1 << 2),
56 OMAP4_ISS_SUBCLK_CSI2_B = (1 << 3),
57 OMAP4_ISS_SUBCLK_CCP2 = (1 << 4),
58 };
59
60 enum iss_isp_subclk_resource {
61 OMAP4_ISS_ISP_SUBCLK_BL = (1 << 0),
62 OMAP4_ISS_ISP_SUBCLK_ISIF = (1 << 1),
63 OMAP4_ISS_ISP_SUBCLK_H3A = (1 << 2),
64 OMAP4_ISS_ISP_SUBCLK_RSZ = (1 << 3),
65 OMAP4_ISS_ISP_SUBCLK_IPIPE = (1 << 4),
66 OMAP4_ISS_ISP_SUBCLK_IPIPEIF = (1 << 5),
67 };
68
69 /*
70 * struct iss_reg - Structure for ISS register values.
71 * @reg: 32-bit Register address.
72 * @val: 32-bit Register value.
73 */
74 struct iss_reg {
75 enum iss_mem_resources mmio_range;
76 u32 reg;
77 u32 val;
78 };
79
80 /*
81 * struct iss_device - ISS device structure.
82 * @crashed: Bitmask of crashed entities (indexed by entity ID)
83 */
84 struct iss_device {
85 struct v4l2_device v4l2_dev;
86 struct media_device media_dev;
87 struct device *dev;
88 u32 revision;
89
90 /* platform HW resources */
91 struct iss_platform_data *pdata;
92 unsigned int irq_num;
93
94 struct resource *res[OMAP4_ISS_MEM_LAST];
95 void __iomem *regs[OMAP4_ISS_MEM_LAST];
96
97 u64 raw_dmamask;
98
99 struct mutex iss_mutex; /* For handling ref_count field */
100 unsigned int crashed;
101 int has_context;
102 int ref_count;
103
104 struct clk *iss_fck;
105 struct clk *iss_ctrlclk;
106
107 /* ISS modules */
108 struct iss_csi2_device csi2a;
109 struct iss_csi2_device csi2b;
110 struct iss_csiphy csiphy1;
111 struct iss_csiphy csiphy2;
112 struct iss_ipipeif_device ipipeif;
113 struct iss_ipipe_device ipipe;
114 struct iss_resizer_device resizer;
115
116 unsigned int subclk_resources;
117 unsigned int isp_subclk_resources;
118 };
119
120 #define v4l2_dev_to_iss_device(dev) \
121 container_of(dev, struct iss_device, v4l2_dev)
122
123 int omap4iss_get_external_info(struct iss_pipeline *pipe,
124 struct media_link *link);
125
126 int omap4iss_module_sync_idle(struct media_entity *me, wait_queue_head_t *wait,
127 atomic_t *stopping);
128
129 int omap4iss_module_sync_is_stopping(wait_queue_head_t *wait,
130 atomic_t *stopping);
131
132 int omap4iss_pipeline_set_stream(struct iss_pipeline *pipe,
133 enum iss_pipeline_stream_state state);
134 void omap4iss_pipeline_cancel_stream(struct iss_pipeline *pipe);
135
136 void omap4iss_configure_bridge(struct iss_device *iss,
137 enum ipipeif_input_entity input);
138
139 struct iss_device *omap4iss_get(struct iss_device *iss);
140 void omap4iss_put(struct iss_device *iss);
141 int omap4iss_subclk_enable(struct iss_device *iss,
142 enum iss_subclk_resource res);
143 int omap4iss_subclk_disable(struct iss_device *iss,
144 enum iss_subclk_resource res);
145 void omap4iss_isp_subclk_enable(struct iss_device *iss,
146 enum iss_isp_subclk_resource res);
147 void omap4iss_isp_subclk_disable(struct iss_device *iss,
148 enum iss_isp_subclk_resource res);
149
150 int omap4iss_pipeline_pm_use(struct media_entity *entity, int use);
151
152 int omap4iss_register_entities(struct platform_device *pdev,
153 struct v4l2_device *v4l2_dev);
154 void omap4iss_unregister_entities(struct platform_device *pdev);
155
156 /*
157 * iss_reg_read - Read the value of an OMAP4 ISS register
158 * @iss: the ISS device
159 * @res: memory resource in which the register is located
160 * @offset: register offset in the memory resource
161 *
162 * Return the register value.
163 */
164 static inline
iss_reg_read(struct iss_device * iss,enum iss_mem_resources res,u32 offset)165 u32 iss_reg_read(struct iss_device *iss, enum iss_mem_resources res,
166 u32 offset)
167 {
168 return readl(iss->regs[res] + offset);
169 }
170
171 /*
172 * iss_reg_write - Write a value to an OMAP4 ISS register
173 * @iss: the ISS device
174 * @res: memory resource in which the register is located
175 * @offset: register offset in the memory resource
176 * @value: value to be written
177 */
178 static inline
iss_reg_write(struct iss_device * iss,enum iss_mem_resources res,u32 offset,u32 value)179 void iss_reg_write(struct iss_device *iss, enum iss_mem_resources res,
180 u32 offset, u32 value)
181 {
182 writel(value, iss->regs[res] + offset);
183 }
184
185 /*
186 * iss_reg_clr - Clear bits in an OMAP4 ISS register
187 * @iss: the ISS device
188 * @res: memory resource in which the register is located
189 * @offset: register offset in the memory resource
190 * @clr: bit mask to be cleared
191 */
192 static inline
iss_reg_clr(struct iss_device * iss,enum iss_mem_resources res,u32 offset,u32 clr)193 void iss_reg_clr(struct iss_device *iss, enum iss_mem_resources res,
194 u32 offset, u32 clr)
195 {
196 u32 v = iss_reg_read(iss, res, offset);
197
198 iss_reg_write(iss, res, offset, v & ~clr);
199 }
200
201 /*
202 * iss_reg_set - Set bits in an OMAP4 ISS register
203 * @iss: the ISS device
204 * @res: memory resource in which the register is located
205 * @offset: register offset in the memory resource
206 * @set: bit mask to be set
207 */
208 static inline
iss_reg_set(struct iss_device * iss,enum iss_mem_resources res,u32 offset,u32 set)209 void iss_reg_set(struct iss_device *iss, enum iss_mem_resources res,
210 u32 offset, u32 set)
211 {
212 u32 v = iss_reg_read(iss, res, offset);
213
214 iss_reg_write(iss, res, offset, v | set);
215 }
216
217 /*
218 * iss_reg_update - Clear and set bits in an OMAP4 ISS register
219 * @iss: the ISS device
220 * @res: memory resource in which the register is located
221 * @offset: register offset in the memory resource
222 * @clr: bit mask to be cleared
223 * @set: bit mask to be set
224 *
225 * Clear the clr mask first and then set the set mask.
226 */
227 static inline
iss_reg_update(struct iss_device * iss,enum iss_mem_resources res,u32 offset,u32 clr,u32 set)228 void iss_reg_update(struct iss_device *iss, enum iss_mem_resources res,
229 u32 offset, u32 clr, u32 set)
230 {
231 u32 v = iss_reg_read(iss, res, offset);
232
233 iss_reg_write(iss, res, offset, (v & ~clr) | set);
234 }
235
236 #define iss_poll_condition_timeout(cond, timeout, min_ival, max_ival) \
237 ({ \
238 unsigned long __timeout = jiffies + usecs_to_jiffies(timeout); \
239 unsigned int __min_ival = (min_ival); \
240 unsigned int __max_ival = (max_ival); \
241 bool __cond; \
242 while (!(__cond = (cond))) { \
243 if (time_after(jiffies, __timeout)) \
244 break; \
245 usleep_range(__min_ival, __max_ival); \
246 } \
247 !__cond; \
248 })
249
250 #endif /* _OMAP4_ISS_H_ */
251