Commit 25708278 authored by Qii Wang's avatar Qii Wang Committed by Wolfram Sang

i2c: mediatek: Add i2c support for MediaTek MT8183

Add i2c compatible for MT8183. Compare to MT2712 i2c controller,
MT8183 has different register offsets. Ltiming_reg is added to
adjust low width of SCL. Arb clock and dma_sync are needed.
Signed-off-by: default avatarQii Wang <qii.wang@mediatek.com>
Reviewed-by: default avatarNicolas Boichat <drinkcat@chromium.org>
Reviewed-by: default avatarMatthias Brugger <matthias.bgg@gmail.com>
Signed-off-by: default avatarWolfram Sang <wsa@the-dreams.de>
parent a15c91ba
...@@ -133,6 +133,7 @@ enum I2C_REGS_OFFSET { ...@@ -133,6 +133,7 @@ enum I2C_REGS_OFFSET {
OFFSET_DEBUGCTRL, OFFSET_DEBUGCTRL,
OFFSET_TRANSFER_LEN_AUX, OFFSET_TRANSFER_LEN_AUX,
OFFSET_CLOCK_DIV, OFFSET_CLOCK_DIV,
OFFSET_LTIMING,
}; };
static const u16 mt_i2c_regs_v1[] = { static const u16 mt_i2c_regs_v1[] = {
...@@ -162,6 +163,32 @@ static const u16 mt_i2c_regs_v1[] = { ...@@ -162,6 +163,32 @@ static const u16 mt_i2c_regs_v1[] = {
[OFFSET_CLOCK_DIV] = 0x70, [OFFSET_CLOCK_DIV] = 0x70,
}; };
static const u16 mt_i2c_regs_v2[] = {
[OFFSET_DATA_PORT] = 0x0,
[OFFSET_SLAVE_ADDR] = 0x4,
[OFFSET_INTR_MASK] = 0x8,
[OFFSET_INTR_STAT] = 0xc,
[OFFSET_CONTROL] = 0x10,
[OFFSET_TRANSFER_LEN] = 0x14,
[OFFSET_TRANSAC_LEN] = 0x18,
[OFFSET_DELAY_LEN] = 0x1c,
[OFFSET_TIMING] = 0x20,
[OFFSET_START] = 0x24,
[OFFSET_EXT_CONF] = 0x28,
[OFFSET_LTIMING] = 0x2c,
[OFFSET_HS] = 0x30,
[OFFSET_IO_CONFIG] = 0x34,
[OFFSET_FIFO_ADDR_CLR] = 0x38,
[OFFSET_TRANSFER_LEN_AUX] = 0x44,
[OFFSET_CLOCK_DIV] = 0x48,
[OFFSET_SOFTRESET] = 0x50,
[OFFSET_DEBUGSTAT] = 0xe0,
[OFFSET_DEBUGCTRL] = 0xe8,
[OFFSET_FIFO_STAT] = 0xf4,
[OFFSET_FIFO_THRESH] = 0xf8,
[OFFSET_DCM_EN] = 0xf88,
};
struct mtk_i2c_compatible { struct mtk_i2c_compatible {
const struct i2c_adapter_quirks *quirks; const struct i2c_adapter_quirks *quirks;
const u16 *regs; const u16 *regs;
...@@ -172,6 +199,7 @@ struct mtk_i2c_compatible { ...@@ -172,6 +199,7 @@ struct mtk_i2c_compatible {
unsigned char support_33bits: 1; unsigned char support_33bits: 1;
unsigned char timing_adjust: 1; unsigned char timing_adjust: 1;
unsigned char dma_sync: 1; unsigned char dma_sync: 1;
unsigned char ltiming_adjust: 1;
}; };
struct mtk_i2c { struct mtk_i2c {
...@@ -195,6 +223,7 @@ struct mtk_i2c { ...@@ -195,6 +223,7 @@ struct mtk_i2c {
enum mtk_trans_op op; enum mtk_trans_op op;
u16 timing_reg; u16 timing_reg;
u16 high_speed_reg; u16 high_speed_reg;
u16 ltiming_reg;
unsigned char auto_restart; unsigned char auto_restart;
bool ignore_restart_irq; bool ignore_restart_irq;
const struct mtk_i2c_compatible *dev_comp; const struct mtk_i2c_compatible *dev_comp;
...@@ -222,6 +251,7 @@ static const struct mtk_i2c_compatible mt2712_compat = { ...@@ -222,6 +251,7 @@ static const struct mtk_i2c_compatible mt2712_compat = {
.support_33bits = 1, .support_33bits = 1,
.timing_adjust = 1, .timing_adjust = 1,
.dma_sync = 0, .dma_sync = 0,
.ltiming_adjust = 0,
}; };
static const struct mtk_i2c_compatible mt6577_compat = { static const struct mtk_i2c_compatible mt6577_compat = {
...@@ -234,6 +264,7 @@ static const struct mtk_i2c_compatible mt6577_compat = { ...@@ -234,6 +264,7 @@ static const struct mtk_i2c_compatible mt6577_compat = {
.support_33bits = 0, .support_33bits = 0,
.timing_adjust = 0, .timing_adjust = 0,
.dma_sync = 0, .dma_sync = 0,
.ltiming_adjust = 0,
}; };
static const struct mtk_i2c_compatible mt6589_compat = { static const struct mtk_i2c_compatible mt6589_compat = {
...@@ -246,6 +277,7 @@ static const struct mtk_i2c_compatible mt6589_compat = { ...@@ -246,6 +277,7 @@ static const struct mtk_i2c_compatible mt6589_compat = {
.support_33bits = 0, .support_33bits = 0,
.timing_adjust = 0, .timing_adjust = 0,
.dma_sync = 0, .dma_sync = 0,
.ltiming_adjust = 0,
}; };
static const struct mtk_i2c_compatible mt7622_compat = { static const struct mtk_i2c_compatible mt7622_compat = {
...@@ -258,6 +290,7 @@ static const struct mtk_i2c_compatible mt7622_compat = { ...@@ -258,6 +290,7 @@ static const struct mtk_i2c_compatible mt7622_compat = {
.support_33bits = 0, .support_33bits = 0,
.timing_adjust = 0, .timing_adjust = 0,
.dma_sync = 0, .dma_sync = 0,
.ltiming_adjust = 0,
}; };
static const struct mtk_i2c_compatible mt8173_compat = { static const struct mtk_i2c_compatible mt8173_compat = {
...@@ -269,6 +302,19 @@ static const struct mtk_i2c_compatible mt8173_compat = { ...@@ -269,6 +302,19 @@ static const struct mtk_i2c_compatible mt8173_compat = {
.support_33bits = 1, .support_33bits = 1,
.timing_adjust = 0, .timing_adjust = 0,
.dma_sync = 0, .dma_sync = 0,
.ltiming_adjust = 0,
};
static const struct mtk_i2c_compatible mt8183_compat = {
.regs = mt_i2c_regs_v2,
.pmic_i2c = 0,
.dcm = 0,
.auto_restart = 1,
.aux_len_reg = 1,
.support_33bits = 1,
.timing_adjust = 1,
.dma_sync = 1,
.ltiming_adjust = 1,
}; };
static const struct of_device_id mtk_i2c_of_match[] = { static const struct of_device_id mtk_i2c_of_match[] = {
...@@ -277,6 +323,7 @@ static const struct of_device_id mtk_i2c_of_match[] = { ...@@ -277,6 +323,7 @@ static const struct of_device_id mtk_i2c_of_match[] = {
{ .compatible = "mediatek,mt6589-i2c", .data = &mt6589_compat }, { .compatible = "mediatek,mt6589-i2c", .data = &mt6589_compat },
{ .compatible = "mediatek,mt7622-i2c", .data = &mt7622_compat }, { .compatible = "mediatek,mt7622-i2c", .data = &mt7622_compat },
{ .compatible = "mediatek,mt8173-i2c", .data = &mt8173_compat }, { .compatible = "mediatek,mt8173-i2c", .data = &mt8173_compat },
{ .compatible = "mediatek,mt8183-i2c", .data = &mt8183_compat },
{} {}
}; };
MODULE_DEVICE_TABLE(of, mtk_i2c_of_match); MODULE_DEVICE_TABLE(of, mtk_i2c_of_match);
...@@ -361,6 +408,8 @@ static void mtk_i2c_init_hw(struct mtk_i2c *i2c) ...@@ -361,6 +408,8 @@ static void mtk_i2c_init_hw(struct mtk_i2c *i2c)
mtk_i2c_writew(i2c, i2c->timing_reg, OFFSET_TIMING); mtk_i2c_writew(i2c, i2c->timing_reg, OFFSET_TIMING);
mtk_i2c_writew(i2c, i2c->high_speed_reg, OFFSET_HS); mtk_i2c_writew(i2c, i2c->high_speed_reg, OFFSET_HS);
if (i2c->dev_comp->ltiming_adjust)
mtk_i2c_writew(i2c, i2c->ltiming_reg, OFFSET_LTIMING);
/* If use i2c pin from PMIC mt6397 side, need set PATH_DIR first */ /* If use i2c pin from PMIC mt6397 side, need set PATH_DIR first */
if (i2c->have_pmic) if (i2c->have_pmic)
...@@ -460,6 +509,8 @@ static int mtk_i2c_set_speed(struct mtk_i2c *i2c, unsigned int parent_clk) ...@@ -460,6 +509,8 @@ static int mtk_i2c_set_speed(struct mtk_i2c *i2c, unsigned int parent_clk)
unsigned int clk_src; unsigned int clk_src;
unsigned int step_cnt; unsigned int step_cnt;
unsigned int sample_cnt; unsigned int sample_cnt;
unsigned int l_step_cnt;
unsigned int l_sample_cnt;
unsigned int target_speed; unsigned int target_speed;
int ret; int ret;
...@@ -469,11 +520,11 @@ static int mtk_i2c_set_speed(struct mtk_i2c *i2c, unsigned int parent_clk) ...@@ -469,11 +520,11 @@ static int mtk_i2c_set_speed(struct mtk_i2c *i2c, unsigned int parent_clk)
if (target_speed > MAX_FS_MODE_SPEED) { if (target_speed > MAX_FS_MODE_SPEED) {
/* Set master code speed register */ /* Set master code speed register */
ret = mtk_i2c_calculate_speed(i2c, clk_src, MAX_FS_MODE_SPEED, ret = mtk_i2c_calculate_speed(i2c, clk_src, MAX_FS_MODE_SPEED,
&step_cnt, &sample_cnt); &l_step_cnt, &l_sample_cnt);
if (ret < 0) if (ret < 0)
return ret; return ret;
i2c->timing_reg = (sample_cnt << 8) | step_cnt; i2c->timing_reg = (l_sample_cnt << 8) | l_step_cnt;
/* Set the high speed mode register */ /* Set the high speed mode register */
ret = mtk_i2c_calculate_speed(i2c, clk_src, target_speed, ret = mtk_i2c_calculate_speed(i2c, clk_src, target_speed,
...@@ -483,6 +534,10 @@ static int mtk_i2c_set_speed(struct mtk_i2c *i2c, unsigned int parent_clk) ...@@ -483,6 +534,10 @@ static int mtk_i2c_set_speed(struct mtk_i2c *i2c, unsigned int parent_clk)
i2c->high_speed_reg = I2C_TIME_DEFAULT_VALUE | i2c->high_speed_reg = I2C_TIME_DEFAULT_VALUE |
(sample_cnt << 12) | (step_cnt << 8); (sample_cnt << 12) | (step_cnt << 8);
if (i2c->dev_comp->ltiming_adjust)
i2c->ltiming_reg = (l_sample_cnt << 6) | l_step_cnt |
(sample_cnt << 12) | (step_cnt << 9);
} else { } else {
ret = mtk_i2c_calculate_speed(i2c, clk_src, target_speed, ret = mtk_i2c_calculate_speed(i2c, clk_src, target_speed,
&step_cnt, &sample_cnt); &step_cnt, &sample_cnt);
...@@ -493,6 +548,9 @@ static int mtk_i2c_set_speed(struct mtk_i2c *i2c, unsigned int parent_clk) ...@@ -493,6 +548,9 @@ static int mtk_i2c_set_speed(struct mtk_i2c *i2c, unsigned int parent_clk)
/* Disable the high speed transaction */ /* Disable the high speed transaction */
i2c->high_speed_reg = I2C_TIME_CLR_VALUE; i2c->high_speed_reg = I2C_TIME_CLR_VALUE;
if (i2c->dev_comp->ltiming_adjust)
i2c->ltiming_reg = (sample_cnt << 6) | step_cnt;
} }
return 0; return 0;
......
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