diff options
Diffstat (limited to 'src/soc/cavium/cn81xx')
| -rw-r--r-- | src/soc/cavium/cn81xx/twsi.c | 27 |
1 files changed, 16 insertions, 11 deletions
diff --git a/src/soc/cavium/cn81xx/twsi.c b/src/soc/cavium/cn81xx/twsi.c index bb91b88ebb..b1c1e66fae 100644 --- a/src/soc/cavium/cn81xx/twsi.c +++ b/src/soc/cavium/cn81xx/twsi.c @@ -12,6 +12,7 @@ #include <delay.h> #include <device/mmio.h> #include <soc/addressmap.h> +#include <timer.h> #define TWSI_THP 24 @@ -348,17 +349,15 @@ static u8 twsi_read_status(void *baseaddr) * * @return 0 for success, 1 if timeout */ -static int twsi_wait(void *baseaddr) +static int twsi_wait(void *baseaddr, struct stopwatch *timeout) { - unsigned long timeout = 500000; u8 twsi_ctl; printk(BIOS_SPEW, "%s(%p)\n", __func__, baseaddr); do { twsi_ctl = twsi_read_ctl(baseaddr); twsi_ctl &= TWSI_CTL_IFLG; - timeout--; - } while (!twsi_ctl && timeout > 0); + } while (!twsi_ctl && !stopwatch_expired(timeout)); printk(BIOS_SPEW, " return: %u\n", !twsi_ctl); return !twsi_ctl; @@ -438,10 +437,12 @@ static int twsi_start(void *baseaddr) { int result; u8 stat; + struct stopwatch timeout; printk(BIOS_SPEW, "%s(%p)\n", __func__, baseaddr); + stopwatch_init_usecs_expire(&timeout, CONFIG_I2C_TRANSFER_TIMEOUT_US); twsi_write_ctl(baseaddr, TWSI_CTL_STA | TWSI_CTL_ENAB); - result = twsi_wait(baseaddr); + result = twsi_wait(baseaddr, &timeout); if (result) { stat = twsi_read_status(baseaddr); printk(BIOS_SPEW, "%s: result: 0x%x, status: 0x%x\n", __func__, @@ -475,9 +476,11 @@ static int twsi_write_data(void *baseaddr, const u8 slave_addr, union twsx_sw_twsi twsi_sw; unsigned int curr = 0; int result; + struct stopwatch timeout; printk(BIOS_SPEW, "%s(%p, 0x%x, %p, 0x%x)\n", __func__, baseaddr, slave_addr, buffer, length); + stopwatch_init_usecs_expire(&timeout, CONFIG_I2C_TRANSFER_TIMEOUT_US); result = twsi_start(baseaddr); if (result) { printk(BIOS_ERR, "%s: Could not start BUS transaction\n", @@ -485,7 +488,7 @@ static int twsi_write_data(void *baseaddr, const u8 slave_addr, return -1; } - result = twsi_wait(baseaddr); + result = twsi_wait(baseaddr, &timeout); if (result) { printk(BIOS_ERR, "%s: wait failed\n", __func__); return result; @@ -500,7 +503,7 @@ static int twsi_write_data(void *baseaddr, const u8 slave_addr, twsi_write_ctl(baseaddr, TWSI_CTL_ENAB); printk(BIOS_SPEW, "%s: Waiting\n", __func__); - result = twsi_wait(baseaddr); + result = twsi_wait(baseaddr, &timeout); if (result) { printk(BIOS_ERR, "%s: Timed out writing slave address 0x%x\n", __func__, slave_addr); @@ -521,7 +524,7 @@ static int twsi_write_data(void *baseaddr, const u8 slave_addr, twsi_write_sw(baseaddr, twsi_sw); twsi_write_ctl(baseaddr, TWSI_CTL_ENAB); - result = twsi_wait(baseaddr); + result = twsi_wait(baseaddr, &timeout); if (result) { printk(BIOS_ERR, "%s: Timed out writing data to 0x%x\n", __func__, slave_addr); @@ -549,16 +552,18 @@ static int twsi_read_data(void *baseaddr, const u8 slave_addr, union twsx_sw_twsi twsi_sw; unsigned int curr = 0; int result; + struct stopwatch timeout; printk(BIOS_SPEW, "%s(%p, 0x%x, %p, %u)\n", __func__, baseaddr, slave_addr, buffer, length); + stopwatch_init_usecs_expire(&timeout, CONFIG_I2C_TRANSFER_TIMEOUT_US); result = twsi_start(baseaddr); if (result) { printk(BIOS_ERR, "%s: start failed\n", __func__); return result; } - result = twsi_wait(baseaddr); + result = twsi_wait(baseaddr, &timeout); if (result) { printk(BIOS_ERR, "%s: wait failed\n", __func__); return result; @@ -574,7 +579,7 @@ static int twsi_read_data(void *baseaddr, const u8 slave_addr, twsi_write_sw(baseaddr, twsi_sw); twsi_write_ctl(baseaddr, TWSI_CTL_ENAB); - result = twsi_wait(baseaddr); + result = twsi_wait(baseaddr, &timeout); if (result) { printk(BIOS_ERR, "%s: waiting for sending addr failed\n", __func__); return result; @@ -590,7 +595,7 @@ static int twsi_read_data(void *baseaddr, const u8 slave_addr, twsi_write_ctl(baseaddr, TWSI_CTL_ENAB | ((curr < length - 1) ? TWSI_CTL_AAK : 0)); - result = twsi_wait(baseaddr); + result = twsi_wait(baseaddr, &timeout); if (result) { printk(BIOS_ERR, "%s: waiting for data failed\n", __func__); |