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1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * Copyright (c) 2012-2015 Synaptics Incorporated
4 * Copyright (C) 2016 Zodiac Inflight Innovations
5 */
6
7#include <linux/bitops.h>
8#include <linux/kernel.h>
9#include <linux/rmi.h>
10#include <linux/slab.h>
11#include "rmi_driver.h"
12
13#define F55_NAME "rmi4_f55"
14
15/* F55 data offsets */
16#define F55_NUM_RX_OFFSET 0
17#define F55_NUM_TX_OFFSET 1
18#define F55_PHYS_CHAR_OFFSET 2
19
20/* Only read required query registers */
21#define F55_QUERY_LEN 3
22
23/* F55 capabilities */
24#define F55_CAP_SENSOR_ASSIGN BIT(0)
25
26struct f55_data {
27 struct rmi_function *fn;
28
29 u8 qry[F55_QUERY_LEN];
30 u8 num_rx_electrodes;
31 u8 cfg_num_rx_electrodes;
32 u8 num_tx_electrodes;
33 u8 cfg_num_tx_electrodes;
34};
35
36static int rmi_f55_detect(struct rmi_function *fn)
37{
38 struct rmi_device *rmi_dev = fn->rmi_dev;
39 struct rmi_driver_data *drv_data = dev_get_drvdata(&rmi_dev->dev);
40 struct f55_data *f55;
41 int error;
42
43 f55 = dev_get_drvdata(&fn->dev);
44
45 error = rmi_read_block(fn->rmi_dev, fn->fd.query_base_addr,
46 &f55->qry, sizeof(f55->qry));
47 if (error) {
48 dev_err(&fn->dev, "%s: Failed to query F55 properties\n",
49 __func__);
50 return error;
51 }
52
53 f55->num_rx_electrodes = f55->qry[F55_NUM_RX_OFFSET];
54 f55->num_tx_electrodes = f55->qry[F55_NUM_TX_OFFSET];
55
56 f55->cfg_num_rx_electrodes = f55->num_rx_electrodes;
57 f55->cfg_num_tx_electrodes = f55->num_rx_electrodes;
58
59 drv_data->num_rx_electrodes = f55->cfg_num_rx_electrodes;
60 drv_data->num_tx_electrodes = f55->cfg_num_rx_electrodes;
61
62 if (f55->qry[F55_PHYS_CHAR_OFFSET] & F55_CAP_SENSOR_ASSIGN) {
63 int i, total;
64 u8 buf[256];
65
66 /*
67 * Calculate the number of enabled receive and transmit
68 * electrodes by reading F55:Ctrl1 (sensor receiver assignment)
69 * and F55:Ctrl2 (sensor transmitter assignment). The number of
70 * enabled electrodes is the sum of all field entries with a
71 * value other than 0xff.
72 */
73 error = rmi_read_block(fn->rmi_dev,
74 fn->fd.control_base_addr + 1,
75 buf, f55->num_rx_electrodes);
76 if (!error) {
77 total = 0;
78 for (i = 0; i < f55->num_rx_electrodes; i++) {
79 if (buf[i] != 0xff)
80 total++;
81 }
82 f55->cfg_num_rx_electrodes = total;
83 drv_data->num_rx_electrodes = total;
84 }
85
86 error = rmi_read_block(fn->rmi_dev,
87 fn->fd.control_base_addr + 2,
88 buf, f55->num_tx_electrodes);
89 if (!error) {
90 total = 0;
91 for (i = 0; i < f55->num_tx_electrodes; i++) {
92 if (buf[i] != 0xff)
93 total++;
94 }
95 f55->cfg_num_tx_electrodes = total;
96 drv_data->num_tx_electrodes = total;
97 }
98 }
99
100 rmi_dbg(RMI_DEBUG_FN, &fn->dev, "F55 num_rx_electrodes: %d (raw %d)\n",
101 f55->cfg_num_rx_electrodes, f55->num_rx_electrodes);
102 rmi_dbg(RMI_DEBUG_FN, &fn->dev, "F55 num_tx_electrodes: %d (raw %d)\n",
103 f55->cfg_num_tx_electrodes, f55->num_tx_electrodes);
104
105 return 0;
106}
107
108static int rmi_f55_probe(struct rmi_function *fn)
109{
110 struct f55_data *f55;
111
112 f55 = devm_kzalloc(&fn->dev, sizeof(struct f55_data), GFP_KERNEL);
113 if (!f55)
114 return -ENOMEM;
115
116 f55->fn = fn;
117 dev_set_drvdata(&fn->dev, f55);
118
119 return rmi_f55_detect(fn);
120}
121
122struct rmi_function_handler rmi_f55_handler = {
123 .driver = {
124 .name = F55_NAME,
125 },
126 .func = 0x55,
127 .probe = rmi_f55_probe,
128};
1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * Copyright (c) 2012-2015 Synaptics Incorporated
4 * Copyright (C) 2016 Zodiac Inflight Innovations
5 */
6
7#include <linux/bitops.h>
8#include <linux/kernel.h>
9#include <linux/rmi.h>
10#include <linux/slab.h>
11#include "rmi_driver.h"
12
13#define F55_NAME "rmi4_f55"
14
15/* F55 data offsets */
16#define F55_NUM_RX_OFFSET 0
17#define F55_NUM_TX_OFFSET 1
18#define F55_PHYS_CHAR_OFFSET 2
19
20/* Only read required query registers */
21#define F55_QUERY_LEN 3
22
23/* F55 capabilities */
24#define F55_CAP_SENSOR_ASSIGN BIT(0)
25
26struct f55_data {
27 struct rmi_function *fn;
28
29 u8 qry[F55_QUERY_LEN];
30 u8 num_rx_electrodes;
31 u8 cfg_num_rx_electrodes;
32 u8 num_tx_electrodes;
33 u8 cfg_num_tx_electrodes;
34};
35
36static int rmi_f55_detect(struct rmi_function *fn)
37{
38 struct rmi_device *rmi_dev = fn->rmi_dev;
39 struct rmi_driver_data *drv_data = dev_get_drvdata(&rmi_dev->dev);
40 struct f55_data *f55;
41 int error;
42
43 f55 = dev_get_drvdata(&fn->dev);
44
45 error = rmi_read_block(fn->rmi_dev, fn->fd.query_base_addr,
46 &f55->qry, sizeof(f55->qry));
47 if (error) {
48 dev_err(&fn->dev, "%s: Failed to query F55 properties\n",
49 __func__);
50 return error;
51 }
52
53 f55->num_rx_electrodes = f55->qry[F55_NUM_RX_OFFSET];
54 f55->num_tx_electrodes = f55->qry[F55_NUM_TX_OFFSET];
55
56 f55->cfg_num_rx_electrodes = f55->num_rx_electrodes;
57 f55->cfg_num_tx_electrodes = f55->num_rx_electrodes;
58
59 drv_data->num_rx_electrodes = f55->cfg_num_rx_electrodes;
60 drv_data->num_tx_electrodes = f55->cfg_num_rx_electrodes;
61
62 if (f55->qry[F55_PHYS_CHAR_OFFSET] & F55_CAP_SENSOR_ASSIGN) {
63 int i, total;
64 u8 buf[256];
65
66 /*
67 * Calculate the number of enabled receive and transmit
68 * electrodes by reading F55:Ctrl1 (sensor receiver assignment)
69 * and F55:Ctrl2 (sensor transmitter assignment). The number of
70 * enabled electrodes is the sum of all field entries with a
71 * value other than 0xff.
72 */
73 error = rmi_read_block(fn->rmi_dev,
74 fn->fd.control_base_addr + 1,
75 buf, f55->num_rx_electrodes);
76 if (!error) {
77 total = 0;
78 for (i = 0; i < f55->num_rx_electrodes; i++) {
79 if (buf[i] != 0xff)
80 total++;
81 }
82 f55->cfg_num_rx_electrodes = total;
83 drv_data->num_rx_electrodes = total;
84 }
85
86 error = rmi_read_block(fn->rmi_dev,
87 fn->fd.control_base_addr + 2,
88 buf, f55->num_tx_electrodes);
89 if (!error) {
90 total = 0;
91 for (i = 0; i < f55->num_tx_electrodes; i++) {
92 if (buf[i] != 0xff)
93 total++;
94 }
95 f55->cfg_num_tx_electrodes = total;
96 drv_data->num_tx_electrodes = total;
97 }
98 }
99
100 rmi_dbg(RMI_DEBUG_FN, &fn->dev, "F55 num_rx_electrodes: %d (raw %d)\n",
101 f55->cfg_num_rx_electrodes, f55->num_rx_electrodes);
102 rmi_dbg(RMI_DEBUG_FN, &fn->dev, "F55 num_tx_electrodes: %d (raw %d)\n",
103 f55->cfg_num_tx_electrodes, f55->num_tx_electrodes);
104
105 return 0;
106}
107
108static int rmi_f55_probe(struct rmi_function *fn)
109{
110 struct f55_data *f55;
111
112 f55 = devm_kzalloc(&fn->dev, sizeof(struct f55_data), GFP_KERNEL);
113 if (!f55)
114 return -ENOMEM;
115
116 f55->fn = fn;
117 dev_set_drvdata(&fn->dev, f55);
118
119 return rmi_f55_detect(fn);
120}
121
122struct rmi_function_handler rmi_f55_handler = {
123 .driver = {
124 .name = F55_NAME,
125 },
126 .func = 0x55,
127 .probe = rmi_f55_probe,
128};