diff options
author | Iyappan Subramanian | 2014-11-03 20:59:55 +0100 |
---|---|---|
committer | David S. Miller | 2014-11-04 23:08:42 +0100 |
commit | c3f4465d272fa94d5a077c502e83d3e712ec8d62 (patch) | |
tree | a18dc1bcc307b3fa4c63a7d113d053ee0ea6ceb3 /drivers/net/ethernet/apm/xgene/xgene_enet_hw.c | |
parent | dtb: xgene: fix: Backward compatibility with older firmware (diff) | |
download | kernel-qcow2-linux-c3f4465d272fa94d5a077c502e83d3e712ec8d62.tar.gz kernel-qcow2-linux-c3f4465d272fa94d5a077c502e83d3e712ec8d62.tar.xz kernel-qcow2-linux-c3f4465d272fa94d5a077c502e83d3e712ec8d62.zip |
drivers: net: xgene: Backward compatibility with older firmware
This patch adds support when used with older firmware (<= 1.13.28).
- Added xgene_ring_mgr_init() to check whether ring manager is initialized
- Calling xgene_ring_mgr_init() from xgene_port_ops.reset()
- To handle errors, changed the return type of xgene_port_ops.reset()
Signed-off-by: Iyappan Subramanian <isubramanian@apm.com>
Signed-off-by: Keyur Chudgar <kchudgar@apm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/ethernet/apm/xgene/xgene_enet_hw.c')
-rw-r--r-- | drivers/net/ethernet/apm/xgene/xgene_enet_hw.c | 18 |
1 files changed, 17 insertions, 1 deletions
diff --git a/drivers/net/ethernet/apm/xgene/xgene_enet_hw.c b/drivers/net/ethernet/apm/xgene/xgene_enet_hw.c index 63ea1941e973..7ba83ffb08ac 100644 --- a/drivers/net/ethernet/apm/xgene/xgene_enet_hw.c +++ b/drivers/net/ethernet/apm/xgene/xgene_enet_hw.c @@ -575,10 +575,24 @@ static void xgene_gmac_tx_disable(struct xgene_enet_pdata *pdata) xgene_enet_wr_mcx_mac(pdata, MAC_CONFIG_1_ADDR, data & ~TX_EN); } -static void xgene_enet_reset(struct xgene_enet_pdata *pdata) +bool xgene_ring_mgr_init(struct xgene_enet_pdata *p) +{ + if (!ioread32(p->ring_csr_addr + CLKEN_ADDR)) + return false; + + if (ioread32(p->ring_csr_addr + SRST_ADDR)) + return false; + + return true; +} + +static int xgene_enet_reset(struct xgene_enet_pdata *pdata) { u32 val; + if (!xgene_ring_mgr_init(pdata)) + return -ENODEV; + clk_prepare_enable(pdata->clk); clk_disable_unprepare(pdata->clk); clk_prepare_enable(pdata->clk); @@ -590,6 +604,8 @@ static void xgene_enet_reset(struct xgene_enet_pdata *pdata) val |= SCAN_AUTO_INCR; MGMT_CLOCK_SEL_SET(&val, 1); xgene_enet_wr_mcx_mac(pdata, MII_MGMT_CONFIG_ADDR, val); + + return 0; } static void xgene_gport_shutdown(struct xgene_enet_pdata *pdata) |