Hi Dmitry:
+static int raydium_i2c_read_message(struct i2c_client *client,
+ u32 addr, void *data, size_t len)
+{
+ __be32 be_addr;
+ size_t xfer_len;
+ int error;
+
+ while (len) {
+ xfer_len = min_t(size_t, len, RM_MAX_READ_SIZE);
+
+ be_addr = cpu_to_be32(addr);
+
+ error = raydium_i2c_send(client, RM_CMD_BANK_SWITCH,
+ &be_addr, sizeof(be_addr));
+ if (!error)
+ error = raydium_i2c_read(client, (be_addr >> 24) & 0xff,
+ data, xfer_len);
+ if (error)
+ return error;
+
+ len -= xfer_len;
+ data += xfer_len;
+ addr += xfer_len;
+ }
+
+ return 0;
+}
I change access address method of touch MCU direct mode so that I can change raydium i2c driver as below.
static int raydium_i2c_read_message(struct i2c_client *client,
u32 addr, void *data, size_t len)
{
__le32 le_addr;
size_t xfer_len;
u32 shift_addr;
int error;
while (len) {
xfer_len = min_t(size_t, len, RM_MAX_READ_SIZE);
le_addr = cpu_to_le32(addr);
shift_addr = le_addr >> 8;/*send the first 3rd byte addr.*/
error = raydium_i2c_send(client, RM_CMD_BANK_SWITCH,
&shift_addr, sizeof(le_addr));
if (!error)/*read from last byte addr.*/
error = raydium_i2c_read(client, le_addr & 0xff,
data, xfer_len);
if (error)
return error;
len -= xfer_len;
data += xfer_len;
addr += xfer_len;
}
return 0;
}
Is this okay? If okay, I will use this form update one new patch.
>> static int raydium_i2c_fw_write_page(struct i2c_client *client,
>> u16 page_idx, const void *data, size_t len)
>> {
>> u8 buf[RM_BL_WRT_LEN];
>> u8 pkg_idx = 1;
>> size_t xfer_len;
>> int error;
>>
>> while (len) {
>> xfer_len = min_t(size_t, len, RM_BL_WRT_PKG_SIZE);
>> buf[BL_HEADER] = RM_CMD_BOOT_PAGE_WRT;
>> /*FIXME,Touch MCU need zero index as start page*/
>> buf[BL_PAGE_STR] = page_idx ? 0xff : 0;
>> buf[BL_PKG_IDX] = pkg_idx++;
>>
>> memcpy(&buf[BL_DATA_STR], data, xfer_len);
>>
>> if (len < RM_BL_WRT_PKG_SIZE) {
>> buf[BL_PKG_IDX] = 4;
>Why 4???
4 is trigger index for write flash. Our page write size is 128 bytes, but in order to meet maximum I2C bus read/write byte limite and need fill full all pages of 128 bytes. So that I split 128 bytes to "4" section, and start burning flash if touch MCU get index "4".
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