From cf8d55ae08459d6412779559fb1e88252db86c9d Mon Sep 17 00:00:00 2001 From: Matt Carlson Date: Mon, 16 Jul 2012 16:24:01 +0000 Subject: [PATCH] tg3: Add APE scratchpad read function for retreiving temperature sensor data. Signed-off-by: Matt Carlson Signed-off-by: Nithin Nayak Sujir Signed-off-by: Michael Chan Signed-off-by: David S. Miller --- drivers/net/ethernet/broadcom/tg3.c | 79 +++++++++++++++++++++++++++++ drivers/net/ethernet/broadcom/tg3.h | 9 +++- 2 files changed, 86 insertions(+), 2 deletions(-) diff --git a/drivers/net/ethernet/broadcom/tg3.c b/drivers/net/ethernet/broadcom/tg3.c index 5dda3ced90e1..26ca36810e72 100644 --- a/drivers/net/ethernet/broadcom/tg3.c +++ b/drivers/net/ethernet/broadcom/tg3.c @@ -752,6 +752,85 @@ static int tg3_ape_event_lock(struct tg3 *tp, u32 timeout_us) return timeout_us ? 0 : -EBUSY; } +static int tg3_ape_wait_for_event(struct tg3 *tp, u32 timeout_us) +{ + u32 i, apedata; + + for (i = 0; i < timeout_us / 10; i++) { + apedata = tg3_ape_read32(tp, TG3_APE_EVENT_STATUS); + + if (!(apedata & APE_EVENT_STATUS_EVENT_PENDING)) + break; + + udelay(10); + } + + return i == timeout_us / 10; +} + +int tg3_ape_scratchpad_read(struct tg3 *tp, u32 *data, u32 base_off, u32 len) +{ + int err; + u32 i, bufoff, msgoff, maxlen, apedata; + + if (!tg3_flag(tp, APE_HAS_NCSI)) + return 0; + + apedata = tg3_ape_read32(tp, TG3_APE_SEG_SIG); + if (apedata != APE_SEG_SIG_MAGIC) + return -ENODEV; + + apedata = tg3_ape_read32(tp, TG3_APE_FW_STATUS); + if (!(apedata & APE_FW_STATUS_READY)) + return -EAGAIN; + + bufoff = tg3_ape_read32(tp, TG3_APE_SEG_MSG_BUF_OFF) + + TG3_APE_SHMEM_BASE; + msgoff = bufoff + 2 * sizeof(u32); + maxlen = tg3_ape_read32(tp, TG3_APE_SEG_MSG_BUF_LEN); + + while (len) { + u32 length; + + /* Cap xfer sizes to scratchpad limits. */ + length = (len > maxlen) ? maxlen : len; + len -= length; + + apedata = tg3_ape_read32(tp, TG3_APE_FW_STATUS); + if (!(apedata & APE_FW_STATUS_READY)) + return -EAGAIN; + + /* Wait for up to 1 msec for APE to service previous event. */ + err = tg3_ape_event_lock(tp, 1000); + if (err) + return err; + + apedata = APE_EVENT_STATUS_DRIVER_EVNT | + APE_EVENT_STATUS_SCRTCHPD_READ | + APE_EVENT_STATUS_EVENT_PENDING; + tg3_ape_write32(tp, TG3_APE_EVENT_STATUS, apedata); + + tg3_ape_write32(tp, bufoff, base_off); + tg3_ape_write32(tp, bufoff + sizeof(u32), length); + + tg3_ape_unlock(tp, TG3_APE_LOCK_MEM); + tg3_ape_write32(tp, TG3_APE_EVENT, APE_EVENT_1); + + base_off += length; + + if (tg3_ape_wait_for_event(tp, 30000)) + return -EAGAIN; + + for (i = 0; length; i += 4, length -= 4) { + u32 val = tg3_ape_read32(tp, msgoff + i); + memcpy(data, &val, sizeof(u32)); + data++; + } + } + + return 0; +} + static int tg3_ape_send_event(struct tg3 *tp, u32 event) { int err; diff --git a/drivers/net/ethernet/broadcom/tg3.h b/drivers/net/ethernet/broadcom/tg3.h index 93865f899a4f..f8a0d9c0e990 100644 --- a/drivers/net/ethernet/broadcom/tg3.h +++ b/drivers/net/ethernet/broadcom/tg3.h @@ -2311,10 +2311,11 @@ #define APE_LOCK_REQ_DRIVER 0x00001000 #define TG3_APE_LOCK_GRANT 0x004c #define APE_LOCK_GRANT_DRIVER 0x00001000 -#define TG3_APE_SEG_SIG 0x4000 -#define APE_SEG_SIG_MAGIC 0x41504521 /* APE shared memory. Accessible through BAR1 */ +#define TG3_APE_SHMEM_BASE 0x4000 +#define TG3_APE_SEG_SIG 0x4000 +#define APE_SEG_SIG_MAGIC 0x41504521 #define TG3_APE_FW_STATUS 0x400c #define APE_FW_STATUS_READY 0x00000100 #define TG3_APE_FW_FEATURES 0x4010 @@ -2327,6 +2328,8 @@ #define APE_FW_VERSION_REVMSK 0x0000ff00 #define APE_FW_VERSION_REVSFT 8 #define APE_FW_VERSION_BLDMSK 0x000000ff +#define TG3_APE_SEG_MSG_BUF_OFF 0x401c +#define TG3_APE_SEG_MSG_BUF_LEN 0x4020 #define TG3_APE_HOST_SEG_SIG 0x4200 #define APE_HOST_SEG_SIG_MAGIC 0x484f5354 #define TG3_APE_HOST_SEG_LEN 0x4204 @@ -2353,6 +2356,8 @@ #define APE_EVENT_STATUS_DRIVER_EVNT 0x00000010 #define APE_EVENT_STATUS_STATE_CHNGE 0x00000500 +#define APE_EVENT_STATUS_SCRTCHPD_READ 0x00001600 +#define APE_EVENT_STATUS_SCRTCHPD_WRITE 0x00001700 #define APE_EVENT_STATUS_STATE_START 0x00010000 #define APE_EVENT_STATUS_STATE_UNLOAD 0x00020000 #define APE_EVENT_STATUS_STATE_WOL 0x00030000 -- 2.39.5