renegade-project/linux-next
2
0
Fork 0
mirror of https://github.com/edk2-porting/linux-next.git synced 2024-12-20 11:13:58 +08:00
Code

pinctrl: rockchip: add support for the rk3399

Browse Source 
The pinctrl of rk3399 is much different from other's,
especially the 3bits of drive strength.

Signed-off-by: David Wu <david.wu@rock-chips.com>
Reviewed-by: Heiko Stuebner <heiko@sntech.de>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
This commit is contained in:
David Wu 2016-02-01 10:58:21 +08:00 committed by Linus Walleij
parent aac7e974eb
commit b6c2327577
2 changed files with 356 additions and 15 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
Documentation/devicetree/bindings/pinctrl/rockchip,pinctrl.txt
View File

@ -22,7 +22,7 @@ Required properties for iomux controller:
- compatible: one of "rockchip,rk2928-pinctrl", "rockchip,rk3066a-pinctrl"
"rockchip,rk3066b-pinctrl", "rockchip,rk3188-pinctrl"
"rockchip,rk3228-pinctrl", "rockchip,rk3288-pinctrl"
"rockchip,rk3368-pinctrl"
"rockchip,rk3368-pinctrl", "rockchip,rk3399-pinctrl"
- rockchip,grf: phandle referencing a syscon providing the
"general register files"

369
drivers/pinctrl/pinctrl-rockchip.c
View File

@ -64,6 +64,7 @@ enum rockchip_pinctrl_type {
RK3188,
RK3288,
RK3368,
RK3399,
};
/**
@ -85,6 +86,31 @@ struct rockchip_iomux {
int offset;
};
/**
* enum type index corresponding to rockchip_perpin_drv_list arrays index.
*/
enum rockchip_pin_drv_type {
DRV_TYPE_IO_DEFAULT = 0,
DRV_TYPE_IO_1V8_OR_3V0,
DRV_TYPE_IO_1V8_ONLY,
DRV_TYPE_IO_1V8_3V0_AUTO,
DRV_TYPE_IO_3V3_ONLY,
DRV_TYPE_MAX
};
/**
* @drv_type: drive strength variant using rockchip_perpin_drv_type
* @offset: if initialized to -1 it will be autocalculated, by specifying
* an initial offset value the relevant source offset can be reset
* to a new value for autocalculating the following drive strength
* registers. if used chips own cal_drv func instead to calculate
* registers offset, the variant could be ignored.
*/
struct rockchip_drv {
enum rockchip_pin_drv_type drv_type;
int offset;
};
/**
* @reg_base: register base of the gpio bank
* @reg_pull: optional separate register for additional pull settings
@ -96,6 +122,7 @@ struct rockchip_iomux {
* @name: name of the bank
* @bank_num: number of the bank, to account for holes
* @iomux: array describing the 4 iomux sources of the bank
* @drv: array describing the 4 drive strength sources of the bank
* @valid: are all necessary informations present
* @of_node: dt node of this bank
* @drvdata: common pinctrl basedata
@ -115,6 +142,7 @@ struct rockchip_pin_bank {
char *name;
u8 bank_num;
struct rockchip_iomux iomux[4];
struct rockchip_drv drv[4];
bool valid;
struct device_node *of_node;
struct rockchip_pinctrl *drvdata;
@ -151,6 +179,47 @@ struct rockchip_pin_bank {
}, \
}
#define PIN_BANK_DRV_FLAGS(id, pins, label, type0, type1, type2, type3) \
{ \
.bank_num = id, \
.nr_pins = pins, \
.name = label, \
.iomux = { \
{ .offset = -1 }, \
{ .offset = -1 }, \
{ .offset = -1 }, \
{ .offset = -1 }, \
}, \
.drv = { \
{ .drv_type = type0, .offset = -1 }, \
{ .drv_type = type1, .offset = -1 }, \
{ .drv_type = type2, .offset = -1 }, \
{ .drv_type = type3, .offset = -1 }, \
}, \
}
#define PIN_BANK_IOMUX_DRV_FLAGS_OFFSET(id, pins, label, iom0, iom1, \
iom2, iom3, drv0, drv1, drv2, \
drv3, offset0, offset1, \
offset2, offset3) \
{ \
.bank_num = id, \
.nr_pins = pins, \
.name = label, \
.iomux = { \
{ .type = iom0, .offset = -1 }, \
{ .type = iom1, .offset = -1 }, \
{ .type = iom2, .offset = -1 }, \
{ .type = iom3, .offset = -1 }, \
}, \
.drv = { \
{ .drv_type = drv0, .offset = offset0 }, \
{ .drv_type = drv1, .offset = offset1 }, \
{ .drv_type = drv2, .offset = offset2 }, \
{ .drv_type = drv3, .offset = offset3 }, \
}, \
}
/**
*/
struct rockchip_pin_ctrl {
@ -161,6 +230,9 @@ struct rockchip_pin_ctrl {
enum rockchip_pinctrl_type type;
int grf_mux_offset;
int pmu_mux_offset;
int grf_drv_offset;
int pmu_drv_offset;
void (*pull_calc_reg)(struct rockchip_pin_bank *bank,
int pin_num, struct regmap **regmap,
int *reg, u8 *bit);
@ -705,7 +777,68 @@ static void rk3368_calc_drv_reg_and_bit(struct rockchip_pin_bank *bank,
}
}
static int rockchip_perpin_drv_list[] = { 2, 4, 8, 12 };
#define RK3399_PULL_GRF_OFFSET 0xe040
#define RK3399_PULL_PMU_OFFSET 0x40
#define RK3399_DRV_3BITS_PER_PIN 3
static void rk3399_calc_pull_reg_and_bit(struct rockchip_pin_bank *bank,
int pin_num, struct regmap **regmap,
int *reg, u8 *bit)
{
struct rockchip_pinctrl *info = bank->drvdata;
/* The bank0:16 and bank1:32 pins are located in PMU */
if ((bank->bank_num == 0) || (bank->bank_num == 1)) {
*regmap = info->regmap_pmu;
*reg = RK3399_PULL_PMU_OFFSET;
*reg += bank->bank_num * RK3188_PULL_BANK_STRIDE;
*reg += ((pin_num / RK3188_PULL_PINS_PER_REG) * 4);
*bit = pin_num % RK3188_PULL_PINS_PER_REG;
*bit *= RK3188_PULL_BITS_PER_PIN;
} else {
*regmap = info->regmap_base;
*reg = RK3399_PULL_GRF_OFFSET;
/* correct the offset, as we're starting with the 3rd bank */
*reg -= 0x20;
*reg += bank->bank_num * RK3188_PULL_BANK_STRIDE;
*reg += ((pin_num / RK3188_PULL_PINS_PER_REG) * 4);
*bit = (pin_num % RK3188_PULL_PINS_PER_REG);
*bit *= RK3188_PULL_BITS_PER_PIN;
}
}
static void rk3399_calc_drv_reg_and_bit(struct rockchip_pin_bank *bank,
int pin_num, struct regmap **regmap,
int *reg, u8 *bit)
{
struct rockchip_pinctrl *info = bank->drvdata;
int drv_num = (pin_num / 8);
/* The bank0:16 and bank1:32 pins are located in PMU */
if ((bank->bank_num == 0) || (bank->bank_num == 1))
*regmap = info->regmap_pmu;
else
*regmap = info->regmap_base;
*reg = bank->drv[drv_num].offset;
if ((bank->drv[drv_num].drv_type == DRV_TYPE_IO_1V8_3V0_AUTO) ||
(bank->drv[drv_num].drv_type == DRV_TYPE_IO_3V3_ONLY))
*bit = (pin_num % 8) * 3;
else
*bit = (pin_num % 8) * 2;
}
static int rockchip_perpin_drv_list[DRV_TYPE_MAX][8] = {
{ 2, 4, 8, 12, -1, -1, -1, -1 },
{ 3, 6, 9, 12, -1, -1, -1, -1 },
{ 5, 10, 15, 20, -1, -1, -1, -1 },
{ 4, 6, 8, 10, 12, 14, 16, 18 },
{ 4, 7, 10, 13, 16, 19, 22, 26 }
};
static int rockchip_get_drive_perpin(struct rockchip_pin_bank *bank,
int pin_num)
@ -714,19 +847,74 @@ static int rockchip_get_drive_perpin(struct rockchip_pin_bank *bank,
struct rockchip_pin_ctrl *ctrl = info->ctrl;
struct regmap *regmap;
int reg, ret;
u32 data;
u32 data, temp, rmask_bits;
u8 bit;
int drv_type = bank->drv[pin_num / 8].drv_type;
ctrl->drv_calc_reg(bank, pin_num, &regmap, &reg, &bit);
switch (drv_type) {
case DRV_TYPE_IO_1V8_3V0_AUTO:
case DRV_TYPE_IO_3V3_ONLY:
rmask_bits = RK3399_DRV_3BITS_PER_PIN;
switch (bit) {
case 0 ... 12:
/* regular case, nothing to do */
break;
case 15:
/*
* drive-strength offset is special, as it is
* spread over 2 registers
*/
ret = regmap_read(regmap, reg, &data);
if (ret)
return ret;
ret = regmap_read(regmap, reg + 0x4, &temp);
if (ret)
return ret;
/*
* the bit data[15] contains bit 0 of the value
* while temp[1:0] contains bits 2 and 1
*/
data >>= 15;
temp &= 0x3;
temp <<= 1;
data |= temp;
return rockchip_perpin_drv_list[drv_type][data];
case 18 ... 21:
/* setting fully enclosed in the second register */
reg += 4;
bit -= 16;
break;
default:
dev_err(info->dev, "unsupported bit: %d for pinctrl drive type: %d\n",
bit, drv_type);
return -EINVAL;
}
break;
case DRV_TYPE_IO_DEFAULT:
case DRV_TYPE_IO_1V8_OR_3V0:
case DRV_TYPE_IO_1V8_ONLY:
rmask_bits = RK3288_DRV_BITS_PER_PIN;
break;
default:
dev_err(info->dev, "unsupported pinctrl drive type: %d\n",
drv_type);
return -EINVAL;
}
ret = regmap_read(regmap, reg, &data);
if (ret)
return ret;
data >>= bit;
data &= (1 << RK3288_DRV_BITS_PER_PIN) - 1;
data &= (1 << rmask_bits) - 1;
return rockchip_perpin_drv_list[data];
return rockchip_perpin_drv_list[drv_type][data];
}
static int rockchip_set_drive_perpin(struct rockchip_pin_bank *bank,
@ -737,16 +925,23 @@ static int rockchip_set_drive_perpin(struct rockchip_pin_bank *bank,
struct regmap *regmap;
unsigned long flags;
int reg, ret, i;
u32 data, rmask;
u32 data, rmask, rmask_bits, temp;
u8 bit;
int drv_type = bank->drv[pin_num / 8].drv_type;
dev_dbg(info->dev, "setting drive of GPIO%d-%d to %d\n",
bank->bank_num, pin_num, strength);
ctrl->drv_calc_reg(bank, pin_num, &regmap, &reg, &bit);
ret = -EINVAL;
for (i = 0; i < ARRAY_SIZE(rockchip_perpin_drv_list); i++) {
if (rockchip_perpin_drv_list[i] == strength) {
for (i = 0; i < ARRAY_SIZE(rockchip_perpin_drv_list[drv_type]); i++) {
if (rockchip_perpin_drv_list[drv_type][i] == strength) {
ret = i;
break;
} else if (rockchip_perpin_drv_list[drv_type][i] < 0) {
ret = rockchip_perpin_drv_list[drv_type][i];
break;
}
}
@ -758,8 +953,64 @@ static int rockchip_set_drive_perpin(struct rockchip_pin_bank *bank,
spin_lock_irqsave(&bank->slock, flags);
switch (drv_type) {
case DRV_TYPE_IO_1V8_3V0_AUTO:
case DRV_TYPE_IO_3V3_ONLY:
rmask_bits = RK3399_DRV_3BITS_PER_PIN;
switch (bit) {
case 0 ... 12:
/* regular case, nothing to do */
break;
case 15:
/*
* drive-strength offset is special, as it is spread
* over 2 registers, the bit data[15] contains bit 0
* of the value while temp[1:0] contains bits 2 and 1
*/
data = (ret & 0x1) << 15;
temp = (ret >> 0x1) & 0x3;
rmask = BIT(15) | BIT(31);
data |= BIT(31);
ret = regmap_update_bits(regmap, reg, rmask, data);
if (ret) {
spin_unlock_irqrestore(&bank->slock, flags);
return ret;
}
rmask = 0x3 | (0x3 << 16);
temp |= (0x3 << 16);
reg += 0x4;
ret = regmap_update_bits(regmap, reg, rmask, temp);
spin_unlock_irqrestore(&bank->slock, flags);
return ret;
case 18 ... 21:
/* setting fully enclosed in the second register */
reg += 4;
bit -= 16;
break;
default:
spin_unlock_irqrestore(&bank->slock, flags);
dev_err(info->dev, "unsupported bit: %d for pinctrl drive type: %d\n",
bit, drv_type);
return -EINVAL;
}
break;
case DRV_TYPE_IO_DEFAULT:
case DRV_TYPE_IO_1V8_OR_3V0:
case DRV_TYPE_IO_1V8_ONLY:
rmask_bits = RK3288_DRV_BITS_PER_PIN;
break;
default:
spin_unlock_irqrestore(&bank->slock, flags);
dev_err(info->dev, "unsupported pinctrl drive type: %d\n",
drv_type);
return -EINVAL;
}
/* enable the write to the equivalent lower bits */
data = ((1 << RK3288_DRV_BITS_PER_PIN) - 1) << (bit + 16);
data = ((1 << rmask_bits) - 1) << (bit + 16);
rmask = data | (data >> 16);
data |= (ret << bit);
@ -796,6 +1047,7 @@ static int rockchip_get_pull(struct rockchip_pin_bank *bank, int pin_num)
case RK3188:
case RK3288:
case RK3368:
case RK3399:
data >>= bit;
data &= (1 << RK3188_PULL_BITS_PER_PIN) - 1;
@ -852,6 +1104,7 @@ static int rockchip_set_pull(struct rockchip_pin_bank *bank,
case RK3188:
case RK3288:
case RK3368:
case RK3399:
spin_lock_irqsave(&bank->slock, flags);
/* enable the write to the equivalent lower bits */
@ -1032,6 +1285,7 @@ static bool rockchip_pinconf_pull_valid(struct rockchip_pin_ctrl *ctrl,
case RK3188:
case RK3288:
case RK3368:
case RK3399:
return (pull != PIN_CONFIG_BIAS_PULL_PIN_DEFAULT);
}
@ -1892,7 +2146,7 @@ static struct rockchip_pin_ctrl *rockchip_pinctrl_get_soc_data(
struct device_node *np;
struct rockchip_pin_ctrl *ctrl;
struct rockchip_pin_bank *bank;
int grf_offs, pmu_offs, i, j;
int grf_offs, pmu_offs, drv_grf_offs, drv_pmu_offs, i, j;
match = of_match_node(rockchip_pinctrl_dt_match, node);
ctrl = (struct rockchip_pin_ctrl *)match->data;
@ -1916,6 +2170,8 @@ static struct rockchip_pin_ctrl *rockchip_pinctrl_get_soc_data(
grf_offs = ctrl->grf_mux_offset;
pmu_offs = ctrl->pmu_mux_offset;
drv_pmu_offs = ctrl->pmu_drv_offset;
drv_grf_offs = ctrl->grf_drv_offset;
bank = ctrl->pin_banks;
for (i = 0; i < ctrl->nr_banks; ++i, ++bank) {
int bank_pins = 0;
@ -1925,27 +2181,39 @@ static struct rockchip_pin_ctrl *rockchip_pinctrl_get_soc_data(
bank->pin_base = ctrl->nr_pins;
ctrl->nr_pins += bank->nr_pins;
/* calculate iomux offsets */
/* calculate iomux and drv offsets */
for (j = 0; j < 4; j++) {
struct rockchip_iomux *iom = &bank->iomux[j];
struct rockchip_drv *drv = &bank->drv[j];
int inc;
if (bank_pins >= bank->nr_pins)
break;
/* preset offset value, set new start value */
/* preset iomux offset value, set new start value */
if (iom->offset >= 0) {
if (iom->type & IOMUX_SOURCE_PMU)
pmu_offs = iom->offset;
else
grf_offs = iom->offset;
} else { /* set current offset */
} else { /* set current iomux offset */
iom->offset = (iom->type & IOMUX_SOURCE_PMU) ?
pmu_offs : grf_offs;
}
dev_dbg(d->dev, "bank %d, iomux %d has offset 0x%x\n",
i, j, iom->offset);
/* preset drv offset value, set new start value */
if (drv->offset >= 0) {
if (iom->type & IOMUX_SOURCE_PMU)
drv_pmu_offs = drv->offset;
else
drv_grf_offs = drv->offset;
} else { /* set current drv offset */
drv->offset = (iom->type & IOMUX_SOURCE_PMU) ?
drv_pmu_offs : drv_grf_offs;
}
dev_dbg(d->dev, "bank %d, iomux %d has iom_offset 0x%x drv_offset 0x%x\n",
i, j, iom->offset, drv->offset);
/*
* Increase offset according to iomux width.
@ -1957,6 +2225,21 @@ static struct rockchip_pin_ctrl *rockchip_pinctrl_get_soc_data(
else
grf_offs += inc;
/*
* Increase offset according to drv width.
* 3bit drive-strenth'es are spread over two registers.
*/
if ((drv->drv_type == DRV_TYPE_IO_1V8_3V0_AUTO) ||
(drv->drv_type == DRV_TYPE_IO_3V3_ONLY))
inc = 8;
else
inc = 4;
if (iom->type & IOMUX_SOURCE_PMU)
drv_pmu_offs += inc;
else
drv_grf_offs += inc;
bank_pins += 8;
}
}
@ -2257,6 +2540,62 @@ static struct rockchip_pin_ctrl rk3368_pin_ctrl = {
.drv_calc_reg = rk3368_calc_drv_reg_and_bit,
};
static struct rockchip_pin_bank rk3399_pin_banks[] = {
PIN_BANK_IOMUX_DRV_FLAGS_OFFSET(0, 32, "gpio0", IOMUX_SOURCE_PMU,
IOMUX_SOURCE_PMU,
IOMUX_SOURCE_PMU,
IOMUX_SOURCE_PMU,
DRV_TYPE_IO_1V8_ONLY,
DRV_TYPE_IO_1V8_ONLY,
DRV_TYPE_IO_DEFAULT,
DRV_TYPE_IO_DEFAULT,
0x0,
0x8,
-1,
-1
),
PIN_BANK_IOMUX_DRV_FLAGS_OFFSET(1, 32, "gpio1", IOMUX_SOURCE_PMU,
IOMUX_SOURCE_PMU,
IOMUX_SOURCE_PMU,
IOMUX_SOURCE_PMU,
DRV_TYPE_IO_1V8_OR_3V0,
DRV_TYPE_IO_1V8_OR_3V0,
DRV_TYPE_IO_1V8_OR_3V0,
DRV_TYPE_IO_1V8_OR_3V0,
0x20,
0x28,
0x30,
0x38
),
PIN_BANK_DRV_FLAGS(2, 32, "gpio2", DRV_TYPE_IO_1V8_OR_3V0,
DRV_TYPE_IO_1V8_OR_3V0,
DRV_TYPE_IO_1V8_ONLY,
DRV_TYPE_IO_1V8_ONLY
),
PIN_BANK_DRV_FLAGS(3, 32, "gpio3", DRV_TYPE_IO_3V3_ONLY,
DRV_TYPE_IO_3V3_ONLY,
DRV_TYPE_IO_3V3_ONLY,
DRV_TYPE_IO_1V8_OR_3V0
),
PIN_BANK_DRV_FLAGS(4, 32, "gpio4", DRV_TYPE_IO_1V8_OR_3V0,
DRV_TYPE_IO_1V8_3V0_AUTO,
DRV_TYPE_IO_1V8_OR_3V0,
DRV_TYPE_IO_1V8_OR_3V0
),
};
static struct rockchip_pin_ctrl rk3399_pin_ctrl = {
.pin_banks = rk3399_pin_banks,
.nr_banks = ARRAY_SIZE(rk3399_pin_banks),
.label = "RK3399-GPIO",
.type = RK3399,
.grf_mux_offset = 0xe000,
.pmu_mux_offset = 0x0,
.grf_drv_offset = 0xe100,
.pmu_drv_offset = 0x80,
.pull_calc_reg = rk3399_calc_pull_reg_and_bit,
.drv_calc_reg = rk3399_calc_drv_reg_and_bit,
};
static const struct of_device_id rockchip_pinctrl_dt_match[] = {
{ .compatible = "rockchip,rk2928-pinctrl",
@ -2275,6 +2614,8 @@ static const struct of_device_id rockchip_pinctrl_dt_match[] = {
.data = (void *)&rk3288_pin_ctrl },
{ .compatible = "rockchip,rk3368-pinctrl",
.data = (void *)&rk3368_pin_ctrl },
{ .compatible = "rockchip,rk3399-pinctrl",
.data = (void *)&rk3399_pin_ctrl },
{},
};
MODULE_DEVICE_TABLE(of, rockchip_pinctrl_dt_match);