Module Name: src
Committed By: jmcneill
Date: Sat May 16 23:09:08 UTC 2015
Modified Files:
src/sys/arch/arm/nvidia: tegra_i2c.c
Log Message:
fix source clock divisor, set MSTR_CONFIG_LOAD after updating config, reset
controller on errors, read from rx fifo before waiting for xfer to complete
To generate a diff of this commit:
cvs rdiff -u -r1.2 -r1.3 src/sys/arch/arm/nvidia/tegra_i2c.c
Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.
Modified files:
Index: src/sys/arch/arm/nvidia/tegra_i2c.c
diff -u src/sys/arch/arm/nvidia/tegra_i2c.c:1.2 src/sys/arch/arm/nvidia/tegra_i2c.c:1.3
--- src/sys/arch/arm/nvidia/tegra_i2c.c:1.2 Sat May 16 21:31:39 2015
+++ src/sys/arch/arm/nvidia/tegra_i2c.c Sat May 16 23:09:08 2015
@@ -1,4 +1,4 @@
-/* $NetBSD: tegra_i2c.c,v 1.2 2015/05/16 21:31:39 jmcneill Exp $ */
+/* $NetBSD: tegra_i2c.c,v 1.3 2015/05/16 23:09:08 jmcneill Exp $ */
/*-
* Copyright (c) 2015 Jared D. McNeill <jmcne...@invisible.ca>
@@ -29,7 +29,7 @@
#include "locators.h"
#include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: tegra_i2c.c,v 1.2 2015/05/16 21:31:39 jmcneill Exp $");
+__KERNEL_RCSID(0, "$NetBSD: tegra_i2c.c,v 1.3 2015/05/16 23:09:08 jmcneill Exp $");
#include <sys/param.h>
#include <sys/bus.h>
@@ -125,7 +125,7 @@ tegra_i2c_attach(device_t parent, device
aprint_normal_dev(self, "interrupting on irq %d\n", loc->loc_intr);
/* Recommended setting for standard mode */
- tegra_car_periph_i2c_enable(loc->loc_port, 204000000);
+ tegra_car_periph_i2c_enable(loc->loc_port, 20400000);
tegra_i2c_init(sc);
@@ -149,6 +149,8 @@ tegra_i2c_init(struct tegra_i2c_softc *s
I2C_WRITE(sc, I2C_CNFG_REG,
I2C_CNFG_NEW_MASTER_FSM | I2C_CNFG_PACKET_MODE_EN);
I2C_SET_CLEAR(sc, I2C_SL_CNFG_REG, I2C_SL_CNFG_NEWSL, 0);
+ I2C_WRITE(sc, I2C_BUS_CONFIG_LOAD_REG,
+ I2C_BUS_CONFIG_LOAD_MSTR_CONFIG_LOAD);
}
static int
@@ -239,6 +241,11 @@ done:
if ((flags & I2C_F_POLL) == 0) {
I2C_WRITE(sc, I2C_INTERRUPT_MASK_REG, 0);
}
+
+ if (error) {
+ tegra_i2c_init(sc);
+ }
+
return error;
}
@@ -349,7 +356,7 @@ tegra_i2c_read(struct tegra_i2c_softc *s
uint8_t *p = buf;
size_t n, resid = buflen;
uint32_t data;
- int error, retry;
+ int retry;
const uint32_t istatus = I2C_READ(sc, I2C_INTERRUPT_STATUS_REG);
I2C_WRITE(sc, I2C_INTERRUPT_STATUS_REG, istatus);
@@ -372,10 +379,6 @@ tegra_i2c_read(struct tegra_i2c_softc *s
I2C_IOPACKET_XMITHDR_IE | I2C_IOPACKET_XMITHDR_READ |
__SHIFTIN((addr << 1) | 1, I2C_IOPACKET_XMITHDR_SLAVE_ADDR));
- if ((error = tegra_i2c_wait(sc, flags)) != 0) {
- return error;
- }
-
while (resid > 0) {
retry = 10000;
while (--retry > 0) {
@@ -399,5 +402,5 @@ tegra_i2c_read(struct tegra_i2c_softc *s
p += min(resid, 4);
}
- return 0;
+ return tegra_i2c_wait(sc, flags);
}
