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18#include <linux/module.h>
19#include <linux/i2c.h>
20#include <linux/firmware.h>
21#include <media/v4l2-common.h>
22#include <media/cx25840.h>
23
24#include "cx25840-core.h"
25
26
27
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30
31
32
33
34
35#define FWSEND 48
36
37#define FWDEV(x) &((x)->dev)
38
39static char *firmware = "";
40
41module_param(firmware, charp, 0444);
42
43MODULE_PARM_DESC(firmware, "Firmware image to load");
44
45static void start_fw_load(struct i2c_client *client)
46{
47
48 cx25840_write(client, 0x800, 0x00);
49 cx25840_write(client, 0x801, 0x00);
50
51 cx25840_write(client, 0x803, 0x0b);
52
53 cx25840_write(client, 0x000, 0x20);
54}
55
56static void end_fw_load(struct i2c_client *client)
57{
58
59 cx25840_write(client, 0x000, 0x00);
60
61 cx25840_write(client, 0x803, 0x03);
62}
63
64#define CX2388x_FIRMWARE "v4l-cx23885-avcore-01.fw"
65#define CX231xx_FIRMWARE "v4l-cx231xx-avcore-01.fw"
66#define CX25840_FIRMWARE "v4l-cx25840.fw"
67
68static const char *get_fw_name(struct i2c_client *client)
69{
70 struct cx25840_state *state = to_state(i2c_get_clientdata(client));
71
72 if (firmware[0])
73 return firmware;
74 if (is_cx2388x(state))
75 return CX2388x_FIRMWARE;
76 if (is_cx231xx(state))
77 return CX231xx_FIRMWARE;
78 return CX25840_FIRMWARE;
79}
80
81static int check_fw_load(struct i2c_client *client, int size)
82{
83
84 int s = cx25840_read(client, 0x801) << 8;
85 s |= cx25840_read(client, 0x800);
86
87 if (size != s) {
88 v4l_err(client, "firmware %s load failed\n",
89 get_fw_name(client));
90 return -EINVAL;
91 }
92
93 v4l_info(client, "loaded %s firmware (%d bytes)\n",
94 get_fw_name(client), size);
95 return 0;
96}
97
98static int fw_write(struct i2c_client *client, const u8 *data, int size)
99{
100 if (i2c_master_send(client, data, size) < size) {
101 v4l_err(client, "firmware load i2c failure\n");
102 return -ENOSYS;
103 }
104
105 return 0;
106}
107
108int cx25840_loadfw(struct i2c_client *client)
109{
110 struct cx25840_state *state = to_state(i2c_get_clientdata(client));
111 const struct firmware *fw = NULL;
112 u8 buffer[FWSEND];
113 const u8 *ptr;
114 const char *fwname = get_fw_name(client);
115 int size, retval;
116 int MAX_BUF_SIZE = FWSEND;
117 u32 gpio_oe = 0, gpio_da = 0;
118
119 if (is_cx2388x(state)) {
120
121 gpio_oe = cx25840_read(client, 0x160);
122 gpio_da = cx25840_read(client, 0x164);
123 }
124
125 if (is_cx231xx(state) && MAX_BUF_SIZE > 16) {
126 v4l_err(client, " Firmware download size changed to 16 bytes max length\n");
127 MAX_BUF_SIZE = 16;
128 }
129
130 if (request_firmware(&fw, fwname, FWDEV(client)) != 0) {
131 v4l_err(client, "unable to open firmware %s\n", fwname);
132 return -EINVAL;
133 }
134
135 start_fw_load(client);
136
137 buffer[0] = 0x08;
138 buffer[1] = 0x02;
139
140 size = fw->size;
141 ptr = fw->data;
142 while (size > 0) {
143 int len = min(MAX_BUF_SIZE - 2, size);
144
145 memcpy(buffer + 2, ptr, len);
146
147 retval = fw_write(client, buffer, len + 2);
148
149 if (retval < 0) {
150 release_firmware(fw);
151 return retval;
152 }
153
154 size -= len;
155 ptr += len;
156 }
157
158 end_fw_load(client);
159
160 size = fw->size;
161 release_firmware(fw);
162
163 if (is_cx2388x(state)) {
164
165 cx25840_write(client, 0x160, gpio_oe);
166 cx25840_write(client, 0x164, gpio_da);
167 }
168
169 return check_fw_load(client, size);
170}
171
172MODULE_FIRMWARE(CX2388x_FIRMWARE);
173MODULE_FIRMWARE(CX231xx_FIRMWARE);
174MODULE_FIRMWARE(CX25840_FIRMWARE);
175
176