#include <linux/regmap.h>
#include <linux/slab.h>
-#include <linux/mfd/mt6360.h>
+enum {
+ MT6360_SLAVE_TCPC = 0,
+ MT6360_SLAVE_PMIC,
+ MT6360_SLAVE_LDO,
+ MT6360_SLAVE_PMU,
+ MT6360_SLAVE_MAX,
+};
+
+struct mt6360_ddata {
+ struct i2c_client *i2c[MT6360_SLAVE_MAX];
+ struct device *dev;
+ struct regmap *regmap;
+ struct regmap_irq_chip_data *irq_data;
+ unsigned int chip_rev;
+ u8 crc8_tbl[CRC8_TABLE_SIZE];
+};
+
+#define MT6360_TCPC_SLAVEID 0x4E
+#define MT6360_PMIC_SLAVEID 0x1A
+#define MT6360_LDO_SLAVEID 0x64
+#define MT6360_PMU_SLAVEID 0x34
+
+#define MT6360_REG_TCPCSTART 0x00
+#define MT6360_REG_TCPCEND 0xFF
+#define MT6360_REG_PMICSTART 0x100
+#define MT6360_REG_PMICEND 0x13B
+#define MT6360_REG_LDOSTART 0x200
+#define MT6360_REG_LDOEND 0x21C
+#define MT6360_REG_PMUSTART 0x300
+#define MT6360_PMU_DEV_INFO 0x300
+#define MT6360_PMU_CHG_IRQ1 0x3D0
+#define MT6360_PMU_CHG_MASK1 0x3F0
+#define MT6360_REG_PMUEND 0x3FF
+
+#define MT6360_PMU_IRQ_REGNUM 16
+
+#define CHIP_VEN_MASK 0xF0
+#define CHIP_VEN_MT6360 0x50
+#define CHIP_REV_MASK 0x0F
+
+#define MT6360_ADDRESS_MASK 0x3F
+#define MT6360_DATA_SIZE_1_BYTE 0x00
+#define MT6360_DATA_SIZE_2_BYTES 0x40
+#define MT6360_DATA_SIZE_3_BYTES 0x80
+#define MT6360_DATA_SIZE_4_BYTES 0xC0
+
+#define MT6360_CRC8_POLYNOMIAL 0x7
+
+#define MT6360_CRC_I2C_ADDR_SIZE 1
+#define MT6360_CRC_REG_ADDR_SIZE 1
+/* prealloca read size = i2c device addr + i2c reg addr + val ... + crc8 */
+#define MT6360_ALLOC_READ_SIZE(_size) (_size + 3)
+/* prealloca write size = i2c device addr + i2c reg addr + val ... + crc8 + dummy byte */
+#define MT6360_ALLOC_WRITE_SIZE(_size) (_size + 4)
+#define MT6360_CRC_PREDATA_OFFSET (MT6360_CRC_I2C_ADDR_SIZE + MT6360_CRC_REG_ADDR_SIZE)
+#define MT6360_CRC_CRC8_SIZE 1
+#define MT6360_CRC_DUMMY_BYTE_SIZE 1
+#define MT6360_REGMAP_REG_BYTE_SIZE 2
+#define I2C_ADDR_XLATE_8BIT(_addr, _rw) (((_addr & 0x7F) << 1) + _rw)
/* reg 0 -> 0 ~ 7 */
#define MT6360_CHG_TREG_EVT 4
#define MT6360_LDO6_PGB_EVT 126
#define MT6360_LDO7_PGB_EVT 127
-static const struct regmap_irq mt6360_pmu_irqs[] = {
+static const struct regmap_irq mt6360_irqs[] = {
REGMAP_IRQ_REG_LINE(MT6360_CHG_TREG_EVT, 8),
REGMAP_IRQ_REG_LINE(MT6360_CHG_AICR_EVT, 8),
REGMAP_IRQ_REG_LINE(MT6360_CHG_MIVR_EVT, 8),
REGMAP_IRQ_REG_LINE(MT6360_LDO7_PGB_EVT, 8),
};
-static int mt6360_pmu_handle_post_irq(void *irq_drv_data)
-{
- struct mt6360_ddata *ddata = irq_drv_data;
-
- return regmap_update_bits(ddata->regmap,
- MT6360_PMU_IRQ_SET, MT6360_IRQ_RETRIG, MT6360_IRQ_RETRIG);
-}
-
-static struct regmap_irq_chip mt6360_pmu_irq_chip = {
- .irqs = mt6360_pmu_irqs,
- .num_irqs = ARRAY_SIZE(mt6360_pmu_irqs),
+static const struct regmap_irq_chip mt6360_irq_chip = {
+ .name = "mt6360_irqs",
+ .irqs = mt6360_irqs,
+ .num_irqs = ARRAY_SIZE(mt6360_irqs),
.num_regs = MT6360_PMU_IRQ_REGNUM,
.mask_base = MT6360_PMU_CHG_MASK1,
.status_base = MT6360_PMU_CHG_IRQ1,
.ack_base = MT6360_PMU_CHG_IRQ1,
.init_ack_masked = true,
.use_ack = true,
- .handle_post_irq = mt6360_pmu_handle_post_irq,
-};
-
-static const struct regmap_config mt6360_pmu_regmap_config = {
- .reg_bits = 8,
- .val_bits = 8,
- .max_register = MT6360_PMU_MAXREG,
};
static const struct resource mt6360_adc_resources[] = {
NULL, 0, 0, "mediatek,mt6360-tcpc"),
};
+static int mt6360_check_vendor_info(struct mt6360_ddata *ddata)
+{
+ u32 info;
+ int ret;
+
+ ret = regmap_read(ddata->regmap, MT6360_PMU_DEV_INFO, &info);
+ if (ret < 0)
+ return ret;
+
+ if ((info & CHIP_VEN_MASK) != CHIP_VEN_MT6360) {
+ dev_err(ddata->dev, "Device not supported\n");
+ return -ENODEV;
+ }
+
+ ddata->chip_rev = info & CHIP_REV_MASK;
+
+ return 0;
+}
+
static const unsigned short mt6360_slave_addr[MT6360_SLAVE_MAX] = {
- MT6360_PMU_SLAVEID,
+ MT6360_TCPC_SLAVEID,
MT6360_PMIC_SLAVEID,
MT6360_LDO_SLAVEID,
- MT6360_TCPC_SLAVEID,
+ MT6360_PMU_SLAVEID,
+};
+
+static int mt6360_xlate_pmicldo_addr(u8 *addr, int rw_size)
+{
+ /* Address is already in encoded [5:0] */
+ *addr &= MT6360_ADDRESS_MASK;
+
+ switch (rw_size) {
+ case 1:
+ *addr |= MT6360_DATA_SIZE_1_BYTE;
+ break;
+ case 2:
+ *addr |= MT6360_DATA_SIZE_2_BYTES;
+ break;
+ case 3:
+ *addr |= MT6360_DATA_SIZE_3_BYTES;
+ break;
+ case 4:
+ *addr |= MT6360_DATA_SIZE_4_BYTES;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+static int mt6360_regmap_read(void *context, const void *reg, size_t reg_size,
+ void *val, size_t val_size)
+{
+ struct mt6360_ddata *ddata = context;
+ u8 bank = *(u8 *)reg;
+ u8 reg_addr = *(u8 *)(reg + 1);
+ struct i2c_client *i2c = ddata->i2c[bank];
+ bool crc_needed = false;
+ u8 *buf;
+ int buf_len = MT6360_ALLOC_READ_SIZE(val_size);
+ int read_size = val_size;
+ u8 crc;
+ int ret;
+
+ if (bank == MT6360_SLAVE_PMIC || bank == MT6360_SLAVE_LDO) {
+ crc_needed = true;
+ ret = mt6360_xlate_pmicldo_addr(®_addr, val_size);
+ if (ret < 0)
+ return ret;
+ read_size += MT6360_CRC_CRC8_SIZE;
+ }
+
+ buf = kzalloc(buf_len, GFP_KERNEL);
+ if (!buf)
+ return -ENOMEM;
+
+ buf[0] = I2C_ADDR_XLATE_8BIT(i2c->addr, I2C_SMBUS_READ);
+ buf[1] = reg_addr;
+
+ ret = i2c_smbus_read_i2c_block_data(i2c, reg_addr, read_size,
+ buf + MT6360_CRC_PREDATA_OFFSET);
+ if (ret < 0)
+ goto out;
+ else if (ret != read_size) {
+ ret = -EIO;
+ goto out;
+ }
+
+ if (crc_needed) {
+ crc = crc8(ddata->crc8_tbl, buf, val_size + MT6360_CRC_PREDATA_OFFSET, 0);
+ if (crc != buf[val_size + MT6360_CRC_PREDATA_OFFSET]) {
+ ret = -EIO;
+ goto out;
+ }
+ }
+
+ memcpy(val, buf + MT6360_CRC_PREDATA_OFFSET, val_size);
+out:
+ kfree(buf);
+ return (ret < 0) ? ret : 0;
+}
+
+static int mt6360_regmap_write(void *context, const void *val, size_t val_size)
+{
+ struct mt6360_ddata *ddata = context;
+ u8 bank = *(u8 *)val;
+ u8 reg_addr = *(u8 *)(val + 1);
+ struct i2c_client *i2c = ddata->i2c[bank];
+ bool crc_needed = false;
+ u8 *buf;
+ int buf_len = MT6360_ALLOC_WRITE_SIZE(val_size);
+ int write_size = val_size - MT6360_REGMAP_REG_BYTE_SIZE;
+ int ret;
+
+ if (bank == MT6360_SLAVE_PMIC || bank == MT6360_SLAVE_LDO) {
+ crc_needed = true;
+ ret = mt6360_xlate_pmicldo_addr(®_addr, val_size - MT6360_REGMAP_REG_BYTE_SIZE);
+ if (ret < 0)
+ return ret;
+ }
+
+ buf = kzalloc(buf_len, GFP_KERNEL);
+ if (!buf)
+ return -ENOMEM;
+
+ buf[0] = I2C_ADDR_XLATE_8BIT(i2c->addr, I2C_SMBUS_WRITE);
+ buf[1] = reg_addr;
+ memcpy(buf + MT6360_CRC_PREDATA_OFFSET, val + MT6360_REGMAP_REG_BYTE_SIZE, write_size);
+
+ if (crc_needed) {
+ buf[val_size] = crc8(ddata->crc8_tbl, buf, val_size, 0);
+ write_size += (MT6360_CRC_CRC8_SIZE + MT6360_CRC_DUMMY_BYTE_SIZE);
+ }
+
+ ret = i2c_smbus_write_i2c_block_data(i2c, reg_addr, write_size,
+ buf + MT6360_CRC_PREDATA_OFFSET);
+
+ kfree(buf);
+ return ret;
+}
+
+static const struct regmap_bus mt6360_regmap_bus = {
+ .read = mt6360_regmap_read,
+ .write = mt6360_regmap_write,
+
+ /* Due to PMIC and LDO CRC access size limit */
+ .max_raw_read = 4,
+ .max_raw_write = 4,
};
-static int mt6360_pmu_probe(struct i2c_client *client)
+static bool mt6360_is_readwrite_reg(struct device *dev, unsigned int reg)
+{
+ switch (reg) {
+ case MT6360_REG_TCPCSTART ... MT6360_REG_TCPCEND:
+ fallthrough;
+ case MT6360_REG_PMICSTART ... MT6360_REG_PMICEND:
+ fallthrough;
+ case MT6360_REG_LDOSTART ... MT6360_REG_LDOEND:
+ fallthrough;
+ case MT6360_REG_PMUSTART ... MT6360_REG_PMUEND:
+ return true;
+ }
+
+ return false;
+}
+
+static const struct regmap_config mt6360_regmap_config = {
+ .reg_bits = 16,
+ .val_bits = 8,
+ .reg_format_endian = REGMAP_ENDIAN_BIG,
+ .max_register = MT6360_REG_PMUEND,
+ .writeable_reg = mt6360_is_readwrite_reg,
+ .readable_reg = mt6360_is_readwrite_reg,
+};
+
+static int mt6360_probe(struct i2c_client *client)
{
struct mt6360_ddata *ddata;
- unsigned int reg_data;
int i, ret;
ddata = devm_kzalloc(&client->dev, sizeof(*ddata), GFP_KERNEL);
ddata->dev = &client->dev;
i2c_set_clientdata(client, ddata);
- ddata->regmap = devm_regmap_init_i2c(client, &mt6360_pmu_regmap_config);
+ for (i = 0; i < MT6360_SLAVE_MAX - 1; i++) {
+ ddata->i2c[i] = devm_i2c_new_dummy_device(&client->dev,
+ client->adapter,
+ mt6360_slave_addr[i]);
+ if (IS_ERR(ddata->i2c[i])) {
+ dev_err(&client->dev,
+ "Failed to get new dummy I2C device for address 0x%x",
+ mt6360_slave_addr[i]);
+ return PTR_ERR(ddata->i2c[i]);
+ }
+ }
+ ddata->i2c[MT6360_SLAVE_MAX - 1] = client;
+
+ crc8_populate_msb(ddata->crc8_tbl, MT6360_CRC8_POLYNOMIAL);
+ ddata->regmap = devm_regmap_init(ddata->dev, &mt6360_regmap_bus, ddata,
+ &mt6360_regmap_config);
if (IS_ERR(ddata->regmap)) {
dev_err(&client->dev, "Failed to register regmap\n");
return PTR_ERR(ddata->regmap);
}
- ret = regmap_read(ddata->regmap, MT6360_PMU_DEV_INFO, ®_data);
- if (ret) {
- dev_err(&client->dev, "Device not found\n");
+ ret = mt6360_check_vendor_info(ddata);
+ if (ret)
return ret;
- }
-
- ddata->chip_rev = reg_data & CHIP_REV_MASK;
- if (ddata->chip_rev != CHIP_VEN_MT6360) {
- dev_err(&client->dev, "Device not supported\n");
- return -ENODEV;
- }
- mt6360_pmu_irq_chip.irq_drv_data = ddata;
ret = devm_regmap_add_irq_chip(&client->dev, ddata->regmap, client->irq,
- IRQF_TRIGGER_FALLING, 0,
- &mt6360_pmu_irq_chip, &ddata->irq_data);
+ 0, 0, &mt6360_irq_chip,
+ &ddata->irq_data);
if (ret) {
dev_err(&client->dev, "Failed to add Regmap IRQ Chip\n");
return ret;
}
- ddata->i2c[0] = client;
- for (i = 1; i < MT6360_SLAVE_MAX; i++) {
- ddata->i2c[i] = devm_i2c_new_dummy_device(&client->dev,
- client->adapter,
- mt6360_slave_addr[i]);
- if (IS_ERR(ddata->i2c[i])) {
- dev_err(&client->dev,
- "Failed to get new dummy I2C device for address 0x%x",
- mt6360_slave_addr[i]);
- return PTR_ERR(ddata->i2c[i]);
- }
- i2c_set_clientdata(ddata->i2c[i], ddata);
- }
-
ret = devm_mfd_add_devices(&client->dev, PLATFORM_DEVID_AUTO,
mt6360_devs, ARRAY_SIZE(mt6360_devs), NULL,
0, regmap_irq_get_domain(ddata->irq_data));
return 0;
}
-static int __maybe_unused mt6360_pmu_suspend(struct device *dev)
+static int __maybe_unused mt6360_suspend(struct device *dev)
{
struct i2c_client *i2c = to_i2c_client(dev);
return 0;
}
-static int __maybe_unused mt6360_pmu_resume(struct device *dev)
+static int __maybe_unused mt6360_resume(struct device *dev)
{
struct i2c_client *i2c = to_i2c_client(dev);
return 0;
}
-static SIMPLE_DEV_PM_OPS(mt6360_pmu_pm_ops,
- mt6360_pmu_suspend, mt6360_pmu_resume);
+static SIMPLE_DEV_PM_OPS(mt6360_pm_ops, mt6360_suspend, mt6360_resume);
-static const struct of_device_id __maybe_unused mt6360_pmu_of_id[] = {
- { .compatible = "mediatek,mt6360_pmu", },
+static const struct of_device_id __maybe_unused mt6360_of_id[] = {
+ { .compatible = "mediatek,mt6360", },
{},
};
-MODULE_DEVICE_TABLE(of, mt6360_pmu_of_id);
+MODULE_DEVICE_TABLE(of, mt6360_of_id);
-static struct i2c_driver mt6360_pmu_driver = {
+static struct i2c_driver mt6360_driver = {
.driver = {
- .name = "mt6360_pmu",
- .pm = &mt6360_pmu_pm_ops,
- .of_match_table = of_match_ptr(mt6360_pmu_of_id),
+ .name = "mt6360",
+ .pm = &mt6360_pm_ops,
+ .of_match_table = of_match_ptr(mt6360_of_id),
},
- .probe_new = mt6360_pmu_probe,
+ .probe_new = mt6360_probe,
};
-module_i2c_driver(mt6360_pmu_driver);
+module_i2c_driver(mt6360_driver);
MODULE_AUTHOR("Gene Chen <gene_chen@richtek.com>");
-MODULE_DESCRIPTION("MT6360 PMU I2C Driver");
+MODULE_DESCRIPTION("MT6360 I2C Driver");
MODULE_LICENSE("GPL v2");
projects / linux-2.6-microblaze.git / blobdiff