If the controller's SPI flash contains user stick calibration(s), they
should be prioritized over the factory calibrations. The user
calibrations have 2 magic bytes preceding them. If the bytes are the
correct magic values, the user calibration is used.
Signed-off-by: Daniel J. Ogorchock <djogorchock@xxxxxxxxx>
---
drivers/hid/hid-nintendo.c | 206 ++++++++++++++++++++++++++-----------
1 file changed, 148 insertions(+), 58 deletions(-)
diff --git a/drivers/hid/hid-nintendo.c b/drivers/hid/hid-nintendo.c
index dcfb80d829713..d2cd4eb869ce3 100644
--- a/drivers/hid/hid-nintendo.c
+++ b/drivers/hid/hid-nintendo.c
@@ -23,6 +23,7 @@
*/
#include "hid-ids.h"
+#include <asm/unaligned.h>
#include <linux/delay.h>
#include <linux/device.h>
#include <linux/hid.h>
@@ -96,11 +97,23 @@ static const u8 JC_USB_RESET = 0x06;
static const u8 JC_USB_PRE_HANDSHAKE = 0x91;
static const u8 JC_USB_SEND_UART = 0x92;
-/* SPI storage addresses of factory calibration data */
-static const u16 JC_CAL_DATA_START = 0x603d;
-static const u16 JC_CAL_DATA_END = 0x604e;
-#define JC_CAL_DATA_SIZE (JC_CAL_DATA_END - JC_CAL_DATA_START + 1)
+/* Magic value denoting presence of user calibration */
+static const u16 JC_CAL_USR_MAGIC_0 = 0xB2;
+static const u16 JC_CAL_USR_MAGIC_1 = 0xA1;
+static const u8 JC_CAL_USR_MAGIC_SIZE = 2;
+
+/* SPI storage addresses of user calibration data */
+static const u16 JC_CAL_USR_LEFT_MAGIC_ADDR = 0x8010;
+static const u16 JC_CAL_USR_LEFT_DATA_ADDR = 0x8012;
+static const u16 JC_CAL_USR_LEFT_DATA_END = 0x801A;
+static const u16 JC_CAL_USR_RIGHT_MAGIC_ADDR = 0x801B;
+static const u16 JC_CAL_USR_RIGHT_DATA_ADDR = 0x801D;
+#define JC_CAL_STICK_DATA_SIZE \
+ (JC_CAL_USR_LEFT_DATA_END - JC_CAL_USR_LEFT_DATA_ADDR + 1)
+/* SPI storage addresses of factory calibration data */
+static const u16 JC_CAL_FCT_DATA_LEFT_ADDR = 0x603d;
+static const u16 JC_CAL_FCT_DATA_RIGHT_ADDR = 0x6046;
/* The raw analog joystick values will be mapped in terms of this magnitude */
static const u16 JC_MAX_STICK_MAG = 32767;
@@ -531,38 +544,140 @@ static int joycon_set_player_leds(struct joycon_ctlr *ctlr, u8 flash, u8 on)
return joycon_send_subcmd(ctlr, req, 1, HZ/4);
}
-static const u16 DFLT_STICK_CAL_CEN = 2000;
-static const u16 DFLT_STICK_CAL_MAX = 3500;
-static const u16 DFLT_STICK_CAL_MIN = 500;
-static int joycon_request_calibration(struct joycon_ctlr *ctlr)
+static int joycon_request_spi_flash_read(struct joycon_ctlr *ctlr,
+ u32 start_addr, u8 size, u8 **reply)
{
struct joycon_subcmd_request *req;
- u8 buffer[sizeof(*req) + 5] = { 0 };
struct joycon_input_report *report;
- struct joycon_stick_cal *cal_x;
- struct joycon_stick_cal *cal_y;
+ u8 buffer[sizeof(*req) + 5] = { 0 };
+ u8 *data;
+ int ret;
+
+ if (!reply)
+ return -EINVAL;
+
+ req = (struct joycon_subcmd_request *)buffer;
+ req->subcmd_id = JC_SUBCMD_SPI_FLASH_READ;
+ data = req->data;
+ put_unaligned_le32(start_addr, data);
+ data[4] = size;
+
+ hid_dbg(ctlr->hdev, "requesting SPI flash data\n");
+ ret = joycon_send_subcmd(ctlr, req, 5, HZ);
+ if (ret) {
+ hid_err(ctlr->hdev, "failed reading SPI flash; ret=%d\n", ret);
+ } else {
+ report = (struct joycon_input_report *)ctlr->input_buf;
+ /* The read data starts at the 6th byte */
+ *reply = &report->reply.data[5];
+ }
+ return ret;
+}
+
+/*
+ * User calibration's presence is denoted with a magic byte preceding it.
+ * returns 0 if magic val is present, 1 if not present, < 0 on error
+ */
+static int joycon_check_for_cal_magic(struct joycon_ctlr *ctlr, u32 flash_addr)
+{
+ int ret;
+ u8 *reply;
+
+ ret = joycon_request_spi_flash_read(ctlr, flash_addr,
+ JC_CAL_USR_MAGIC_SIZE, &reply);
+ if (ret)
+ return ret;
+
+ return reply[0] != JC_CAL_USR_MAGIC_0 || reply[1] != JC_CAL_USR_MAGIC_1;
+}
+
+static int joycon_read_stick_calibration(struct joycon_ctlr *ctlr, u16 cal_addr,
+ struct joycon_stick_cal *cal_x,
+ struct joycon_stick_cal *cal_y,
+ bool left_stick)
+{
s32 x_max_above;
s32 x_min_below;
s32 y_max_above;
s32 y_min_below;
- u8 *data;
u8 *raw_cal;
int ret;
- req = (struct joycon_subcmd_request *)buffer;
- req->subcmd_id = JC_SUBCMD_SPI_FLASH_READ;
- data = req->data;
- data[0] = 0xFF & JC_CAL_DATA_START;
- data[1] = 0xFF & (JC_CAL_DATA_START >> 8);
- data[2] = 0xFF & (JC_CAL_DATA_START >> 16);
- data[3] = 0xFF & (JC_CAL_DATA_START >> 24);
- data[4] = JC_CAL_DATA_SIZE;
+ ret = joycon_request_spi_flash_read(ctlr, cal_addr,
+ JC_CAL_STICK_DATA_SIZE, &raw_cal);
+ if (ret)
+ return ret;
+
+ /* stick calibration parsing: note the order differs based on stick */
+ if (left_stick) {
+ x_max_above = hid_field_extract(ctlr->hdev, (raw_cal + 0), 0,
+ 12);
+ y_max_above = hid_field_extract(ctlr->hdev, (raw_cal + 1), 4,
+ 12);
+ cal_x->center = hid_field_extract(ctlr->hdev, (raw_cal + 3), 0,
+ 12);
+ cal_y->center = hid_field_extract(ctlr->hdev, (raw_cal + 4), 4,
+ 12);
+ x_min_below = hid_field_extract(ctlr->hdev, (raw_cal + 6), 0,
+ 12);
+ y_min_below = hid_field_extract(ctlr->hdev, (raw_cal + 7), 4,
+ 12);
+ } else {
+ cal_x->center = hid_field_extract(ctlr->hdev, (raw_cal + 0), 0,
+ 12);
+ cal_y->center = hid_field_extract(ctlr->hdev, (raw_cal + 1), 4,
+ 12);
+ x_min_below = hid_field_extract(ctlr->hdev, (raw_cal + 3), 0,
+ 12);
+ y_min_below = hid_field_extract(ctlr->hdev, (raw_cal + 4), 4,
+ 12);
+ x_max_above = hid_field_extract(ctlr->hdev, (raw_cal + 6), 0,
+ 12);
+ y_max_above = hid_field_extract(ctlr->hdev, (raw_cal + 7), 4,
+ 12);
+ }
+
+ cal_x->max = cal_x->center + x_max_above;
+ cal_x->min = cal_x->center - x_min_below;
+ cal_y->max = cal_y->center + y_max_above;
+ cal_y->min = cal_y->center - y_min_below;
+
+ return 0;
+}
+
+static const u16 DFLT_STICK_CAL_CEN = 2000;
+static const u16 DFLT_STICK_CAL_MAX = 3500;
+static const u16 DFLT_STICK_CAL_MIN = 500;
+static int joycon_request_calibration(struct joycon_ctlr *ctlr)
+{
+ u16 left_stick_addr = JC_CAL_FCT_DATA_LEFT_ADDR;
+ u16 right_stick_addr = JC_CAL_FCT_DATA_RIGHT_ADDR;
+ int ret;
hid_dbg(ctlr->hdev, "requesting cal data\n");
- ret = joycon_send_subcmd(ctlr, req, 5, HZ);
+
+ /* check if user stick calibrations are present */
+ if (!joycon_check_for_cal_magic(ctlr, JC_CAL_USR_LEFT_MAGIC_ADDR)) {
+ left_stick_addr = JC_CAL_USR_LEFT_DATA_ADDR;
+ hid_info(ctlr->hdev, "using user cal for left stick\n");
+ } else {
+ hid_info(ctlr->hdev, "using factory cal for left stick\n");
+ }
+ if (!joycon_check_for_cal_magic(ctlr, JC_CAL_USR_RIGHT_MAGIC_ADDR)) {
+ right_stick_addr = JC_CAL_USR_RIGHT_DATA_ADDR;
+ hid_info(ctlr->hdev, "using user cal for right stick\n");
+ } else {
+ hid_info(ctlr->hdev, "using factory cal for right stick\n");
+ }
+
+ /* read the left stick calibration data */
+ ret = joycon_read_stick_calibration(ctlr, left_stick_addr,
+ &ctlr->left_stick_cal_x,
+ &ctlr->left_stick_cal_y,
+ true);
if (ret) {
hid_warn(ctlr->hdev,
- "Failed to read stick cal, using defaults; ret=%d\n",
+ "Failed to read left stick cal, using dflts; e=%d\n",
ret);
ctlr->left_stick_cal_x.center = DFLT_STICK_CAL_CEN;
@@ -572,6 +687,17 @@ static int joycon_request_calibration(struct joycon_ctlr *ctlr)
ctlr->left_stick_cal_y.center = DFLT_STICK_CAL_CEN;
ctlr->left_stick_cal_y.max = DFLT_STICK_CAL_MAX;
ctlr->left_stick_cal_y.min = DFLT_STICK_CAL_MIN;
+ }
+
+ /* read the right stick calibration data */
+ ret = joycon_read_stick_calibration(ctlr, right_stick_addr,
+ &ctlr->right_stick_cal_x,
+ &ctlr->right_stick_cal_y,
+ false);
+ if (ret) {
+ hid_warn(ctlr->hdev,
+ "Failed to read right stick cal, using dflts; e=%d\n",
+ ret);
ctlr->right_stick_cal_x.center = DFLT_STICK_CAL_CEN;
ctlr->right_stick_cal_x.max = DFLT_STICK_CAL_MAX;
@@ -580,44 +706,8 @@ static int joycon_request_calibration(struct joycon_ctlr *ctlr)
ctlr->right_stick_cal_y.center = DFLT_STICK_CAL_CEN;
ctlr->right_stick_cal_y.max = DFLT_STICK_CAL_MAX;
ctlr->right_stick_cal_y.min = DFLT_STICK_CAL_MIN;
-
- return ret;
}
- report = (struct joycon_input_report *)ctlr->input_buf;
- raw_cal = &report->reply.data[5];
-
- /* left stick calibration parsing */
- cal_x = &ctlr->left_stick_cal_x;
- cal_y = &ctlr->left_stick_cal_y;
-
- x_max_above = hid_field_extract(ctlr->hdev, (raw_cal + 0), 0, 12);
- y_max_above = hid_field_extract(ctlr->hdev, (raw_cal + 1), 4, 12);
- cal_x->center = hid_field_extract(ctlr->hdev, (raw_cal + 3), 0, 12);
- cal_y->center = hid_field_extract(ctlr->hdev, (raw_cal + 4), 4, 12);
- x_min_below = hid_field_extract(ctlr->hdev, (raw_cal + 6), 0, 12);
- y_min_below = hid_field_extract(ctlr->hdev, (raw_cal + 7), 4, 12);
- cal_x->max = cal_x->center + x_max_above;
- cal_x->min = cal_x->center - x_min_below;
- cal_y->max = cal_y->center + y_max_above;
- cal_y->min = cal_y->center - y_min_below;
-
- /* right stick calibration parsing */
- raw_cal += 9;
- cal_x = &ctlr->right_stick_cal_x;
- cal_y = &ctlr->right_stick_cal_y;
-
- cal_x->center = hid_field_extract(ctlr->hdev, (raw_cal + 0), 0, 12);
- cal_y->center = hid_field_extract(ctlr->hdev, (raw_cal + 1), 4, 12);
- x_min_below = hid_field_extract(ctlr->hdev, (raw_cal + 3), 0, 12);
- y_min_below = hid_field_extract(ctlr->hdev, (raw_cal + 4), 4, 12);
- x_max_above = hid_field_extract(ctlr->hdev, (raw_cal + 6), 0, 12);
- y_max_above = hid_field_extract(ctlr->hdev, (raw_cal + 7), 4, 12);
- cal_x->max = cal_x->center + x_max_above;
- cal_x->min = cal_x->center - x_min_below;
- cal_y->max = cal_y->center + y_max_above;
- cal_y->min = cal_y->center - y_min_below;
-
hid_dbg(ctlr->hdev, "calibration:\n"
"l_x_c=%d l_x_max=%d l_x_min=%d\n"
"l_y_c=%d l_y_max=%d l_y_min=%d\n"
--
2.33.0
