diff options
Diffstat (limited to 'drivers/i2c')
| -rw-r--r-- | drivers/i2c/fsl_i2c.c | 14 | ||||
| -rw-r--r-- | drivers/i2c/mvtwsi.c | 33 |
2 files changed, 29 insertions, 18 deletions
diff --git a/drivers/i2c/fsl_i2c.c b/drivers/i2c/fsl_i2c.c index ff7f25a0ef7..b56a1c2541d 100644 --- a/drivers/i2c/fsl_i2c.c +++ b/drivers/i2c/fsl_i2c.c @@ -4,19 +4,7 @@ * 2012, Heiko Schocher, DENX Software Engineering, hs@denx.de. * Changes for multibus/multiadapter I2C support. * - * This program is free software; you can redistribute it and/or - * modify it under the terms of the GNU General Public License - * Version 2 as published by the Free Software Foundation. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 59 Temple Place, Suite 330, Boston, - * MA 02111-1307 USA + * SPDX-License-Identifier: GPL-2.0 */ #include <common.h> diff --git a/drivers/i2c/mvtwsi.c b/drivers/i2c/mvtwsi.c index f20d1b22915..5f993b99052 100644 --- a/drivers/i2c/mvtwsi.c +++ b/drivers/i2c/mvtwsi.c @@ -20,7 +20,7 @@ #if defined(CONFIG_ORION5X) #include <asm/arch/orion5x.h> -#elif (defined(CONFIG_KIRKWOOD) || defined(CONFIG_ARMADA_XP)) +#elif (defined(CONFIG_KIRKWOOD) || defined(CONFIG_ARCH_MVEBU)) #include <asm/arch/soc.h> #elif defined(CONFIG_SUNXI) #include <asm/arch/i2c.h> @@ -73,6 +73,17 @@ struct mvtwsi_registers { #define MVTWSI_CONTROL_INTEN 0x00000080 /* + * On sun6i and newer IFLG is a write-clear bit which is cleared by writing 1, + * on other platforms it is a normal r/w bit which is cleared by writing 0. + */ + +#ifdef CONFIG_SUNXI_GEN_SUN6I +#define MVTWSI_CONTROL_CLEAR_IFLG 0x00000008 +#else +#define MVTWSI_CONTROL_CLEAR_IFLG 0x00000000 +#endif + +/* * Status register values -- only those expected in normal master * operation on non-10-bit-address devices; whatever status we don't * expect in nominal conditions (bus errors, arbitration losses, @@ -117,6 +128,10 @@ static struct mvtwsi_registers *twsi_get_base(struct i2c_adapter *adap) case 4: return (struct mvtwsi_registers *) CONFIG_I2C_MVTWSI_BASE4; #endif +#ifdef CONFIG_I2C_MVTWSI_BASE5 + case 5: + return (struct mvtwsi_registers *) CONFIG_I2C_MVTWSI_BASE5; +#endif default: printf("Missing mvtwsi controller %d base\n", adap->hwadapnr); break; @@ -189,7 +204,8 @@ static int twsi_start(struct i2c_adapter *adap, int expected_status) /* globally set TWSIEN in case it was not */ twsi_control_flags |= MVTWSI_CONTROL_TWSIEN; /* assert START */ - writel(twsi_control_flags | MVTWSI_CONTROL_START, &twsi->control); + twsi_control_flags |= MVTWSI_CONTROL_START | MVTWSI_CONTROL_CLEAR_IFLG; + writel(twsi_control_flags, &twsi->control); /* wait for controller to process START */ return twsi_wait(adap, expected_status); } @@ -204,7 +220,7 @@ static int twsi_send(struct i2c_adapter *adap, u8 byte, int expected_status) /* put byte in data register for sending */ writel(byte, &twsi->data); /* clear any pending interrupt -- that'll cause sending */ - writel(twsi_control_flags, &twsi->control); + writel(twsi_control_flags | MVTWSI_CONTROL_CLEAR_IFLG, &twsi->control); /* wait for controller to receive byte and check ACK */ return twsi_wait(adap, expected_status); } @@ -224,7 +240,7 @@ static int twsi_recv(struct i2c_adapter *adap, u8 *byte) else expected_status = MVTWSI_STATUS_DATA_R_NAK; /* acknowledge *previous state* and launch receive */ - writel(twsi_control_flags, &twsi->control); + writel(twsi_control_flags | MVTWSI_CONTROL_CLEAR_IFLG, &twsi->control); /* wait for controller to receive byte and assert ACK or NAK */ status = twsi_wait(adap, expected_status); /* if we did receive expected byte then store it */ @@ -246,7 +262,7 @@ static int twsi_stop(struct i2c_adapter *adap, int status) /* assert STOP */ control = MVTWSI_CONTROL_TWSIEN | MVTWSI_CONTROL_STOP; - writel(control, &twsi->control); + writel(control | MVTWSI_CONTROL_CLEAR_IFLG, &twsi->control); /* wait for IDLE; IFLG won't rise so twsi_wait() is no use. */ do { stop_status = readl(&twsi->status); @@ -475,3 +491,10 @@ U_BOOT_I2C_ADAP_COMPLETE(twsi4, twsi_i2c_init, twsi_i2c_probe, CONFIG_SYS_I2C_SPEED, CONFIG_SYS_I2C_SLAVE, 4) #endif +#ifdef CONFIG_I2C_MVTWSI_BASE5 +U_BOOT_I2C_ADAP_COMPLETE(twsi5, twsi_i2c_init, twsi_i2c_probe, + twsi_i2c_read, twsi_i2c_write, + twsi_i2c_set_bus_speed, + CONFIG_SYS_I2C_SPEED, CONFIG_SYS_I2C_SLAVE, 5) + +#endif |