[U-Boot] [PATCH 1/1] ppc4xx: Add support for GPCS, SGMII and M88E1112 PHY
Victor Gallardo
vgallardo at amcc.com
Sat Aug 30 13:08:10 CEST 2008
This patch adds GPCS, SGMII and M88E1112 PHY support
for the AMCC PPC460GT/EX processors.
Signed-off-by: Victor Gallardo <vgallardo at amcc.com>
---
cpu/ppc4xx/4xx_enet.c | 122 ++++++++++++++++++++++++++++++++++++++++++++++++-
cpu/ppc4xx/miiphy.c | 41 +++++++++++++++-
include/ppc4xx_enet.h | 3 +
3 files changed, 161 insertions(+), 5 deletions(-)
diff --git a/cpu/ppc4xx/4xx_enet.c b/cpu/ppc4xx/4xx_enet.c
index 8a38335..f6cbf2b 100644
--- a/cpu/ppc4xx/4xx_enet.c
+++ b/cpu/ppc4xx/4xx_enet.c
@@ -198,6 +198,7 @@
#define BI_PHYMODE_RMII 8
#endif
#endif
+#define BI_PHYMODE_SGMII 9
#if defined(CONFIG_440SP) || defined(CONFIG_440SPE) || \
defined(CONFIG_440EPX) || defined(CONFIG_440GRX) || \
@@ -216,6 +217,20 @@
#define MAL_RX_CHAN_MUL 1
#endif
+/*
+ * Some boards do not have a PHY for each ethernet port.
+ * For example on Arches board (2 CPU system) eth0 does not have
+ * a PHY, both CPU's are wired directly together (AC coupled)
+ * using SGMII0. In these cases set the appropriate
+ * CONFIG_PHY_ADDR equal to CONFIG_PHY_LESS to detect that
+ * the specified ethernet port does not have a PHY.
+ */
+#if !defined(CONFIG_PHY_LESS)
+#define CONFIG_PHY_LESS 0xFFFFFFFF /* PHY-less mode */
+#define CONFIG_PHY_LESS_SPEED 1000
+#define CONFIG_PHY_LESS_DUPLEX FULL
+#endif
+
/*-----------------------------------------------------------------------------+
* Global variables. TX and RX descriptors and buffers.
*-----------------------------------------------------------------------------*/
@@ -611,8 +626,17 @@ int ppc_4xx_eth_setup_bridge(int devnum, bd_t * bis)
#if defined(CONFIG_460EX)
mode = 9;
+ mfsdr(SDR0_ETH_CFG, eth_cfg);
+ if (((eth_cfg & SDR0_ETH_CFG_SGMII0_ENABLE) > 0) &&
+ ((eth_cfg & SDR0_ETH_CFG_SGMII1_ENABLE) > 0))
+ mode = 11; /* config SGMII */
#else
mode = 10;
+ mfsdr(SDR0_ETH_CFG, eth_cfg);
+ if (((eth_cfg & SDR0_ETH_CFG_SGMII0_ENABLE) > 0) &&
+ ((eth_cfg & SDR0_ETH_CFG_SGMII1_ENABLE) > 0) &&
+ ((eth_cfg & SDR0_ETH_CFG_SGMII2_ENABLE) > 0))
+ mode = 12; /* config SGMII */
#endif
/* TODO:
@@ -635,6 +659,8 @@ int ppc_4xx_eth_setup_bridge(int devnum, bd_t * bis)
/*
* Right now only 2*RGMII is supported. Please extend when needed.
* sr - 2008-02-19
+ * Add SGMII support.
+ * vg - 2008-07-28
*/
switch (mode) {
case 1:
@@ -761,6 +787,20 @@ int ppc_4xx_eth_setup_bridge(int devnum, bd_t * bis)
bis->bi_phymode[2] = BI_PHYMODE_RGMII;
bis->bi_phymode[3] = BI_PHYMODE_RGMII;
break;
+ case 11:
+ /* 2 SGMII - 460EX */
+ bis->bi_phymode[0] = BI_PHYMODE_SGMII;
+ bis->bi_phymode[1] = BI_PHYMODE_SGMII;
+ bis->bi_phymode[2] = BI_PHYMODE_NONE;
+ bis->bi_phymode[3] = BI_PHYMODE_NONE;
+ break;
+ case 12:
+ /* 3 SGMII - 460GT */
+ bis->bi_phymode[0] = BI_PHYMODE_SGMII;
+ bis->bi_phymode[1] = BI_PHYMODE_SGMII;
+ bis->bi_phymode[2] = BI_PHYMODE_SGMII;
+ bis->bi_phymode[3] = BI_PHYMODE_NONE;
+ break;
default:
break;
}
@@ -945,6 +985,48 @@ static int ppc_4xx_eth_init (struct eth_device *dev, bd_t * bis)
out_be32((void *)EMAC_M1 + hw_p->hw_addr, mode_reg);
#endif /* defined(CONFIG_440GX) || defined(CONFIG_440SP) */
+#if defined(CONFIG_GPCS_PHY_ADDR) || defined(CONFIG_GPCS_PHY1_ADDR) || \
+ defined(CONFIG_GPCS_PHY2_ADDR) || defined(CONFIG_GPCS_PHY3_ADDR)
+ if (bis->bi_phymode[devnum] == BI_PHYMODE_SGMII) {
+ /*
+ * In SGMII mode, GPCS access is needed for
+ * communication with the internal SGMII SerDes.
+ */
+ switch (devnum) {
+#if defined(CONFIG_GPCS_PHY_ADDR)
+ case 0:
+ reg = CONFIG_GPCS_PHY_ADDR;
+ break;
+#endif
+#if defined(CONFIG_GPCS_PHY1_ADDR)
+ case 1:
+ reg = CONFIG_GPCS_PHY1_ADDR;
+ break;
+#endif
+#if defined(CONFIG_GPCS_PHY2_ADDR)
+ case 2:
+ reg = CONFIG_GPCS_PHY2_ADDR;
+ break;
+#endif
+#if defined(CONFIG_GPCS_PHY3_ADDR)
+ case 3:
+ reg = CONFIG_GPCS_PHY3_ADDR;
+ break;
+#endif
+ }
+
+ mode_reg = in_be32((void *)EMAC_M1 + hw_p->hw_addr);
+ mode_reg |= EMAC_M1_MF_1000GPCS | EMAC_M1_IPPA_SET(reg);
+ out_be32((void *)EMAC_M1 + hw_p->hw_addr, mode_reg);
+
+ /* Configure GPCS interface to recommended setting for SGMII */
+ miiphy_reset(dev->name, reg);
+ miiphy_write(dev->name, reg, 0x04, 0x8120); /* AsymPause, FDX */
+ miiphy_write(dev->name, reg, 0x07, 0x2801); /* msg_pg, toggle */
+ miiphy_write(dev->name, reg, 0x00, 0x0140); /* 1Gbps, FDX */
+ }
+#endif /* defined(CONFIG_GPCS_PHY_ADDR) */
+
/* wait for PHY to complete auto negotiation */
reg_short = 0;
#ifndef CONFIG_CS8952_PHY
@@ -974,6 +1056,9 @@ static int ppc_4xx_eth_init (struct eth_device *dev, bd_t * bis)
bis->bi_phynum[devnum] = reg;
+ if (reg == CONFIG_PHY_LESS)
+ goto get_speed;
+
#if defined(CONFIG_PHY_RESET)
/*
* Reset the phy, only if its the first time through
@@ -986,6 +1071,33 @@ static int ppc_4xx_eth_init (struct eth_device *dev, bd_t * bis)
miiphy_write (dev->name, reg, 0x09, 0x0e00);
miiphy_write (dev->name, reg, 0x04, 0x01e1);
#endif
+#if defined(CONFIG_M88E1112_PHY)
+ if (bis->bi_phymode[devnum] == BI_PHYMODE_SGMII) {
+ /*
+ * Marvell 88E1112 PHY needs to have the SGMII MAC
+ * interace (page 2) properly configured to
+ * communicate with the 460EX/GT GPCS interface.
+ */
+
+ /* Set access to Page 2 */
+ miiphy_write(dev->name, reg, 0x16, 0x0002);
+
+ miiphy_write(dev->name, reg, 0x00, 0x0040); /* 1Gbps */
+ miiphy_read(dev->name, reg, 0x10, ®_short);
+ reg_short &= ~0x0C00; /* Preferred Media MASK */
+ reg_short |= 0x0800; /* Preferred Media Copper */
+ reg_short &= ~0x0380; /* Mode Select MASK */
+ reg_short |= 0x0280; /* Mode Select Copper only */
+ miiphy_write(dev->name, reg, 0x10, reg_short);
+ miiphy_read(dev->name, reg, 0x1a, ®_short);
+ reg_short |= 0x8000; /* bypass Auto-Negotiation */
+ miiphy_write(dev->name, reg, 0x1a, reg_short);
+ miiphy_reset(dev->name, reg); /* reset MAC interface */
+
+ /* Reset access to Page 0 */
+ miiphy_write(dev->name, reg, 0x16, 0x0000);
+ }
+#endif /* defined(CONFIG_M88E1112_PHY) */
miiphy_reset (dev->name, reg);
#if defined(CONFIG_440GX) || \
@@ -1080,8 +1192,14 @@ static int ppc_4xx_eth_init (struct eth_device *dev, bd_t * bis)
}
#endif /* #ifndef CONFIG_CS8952_PHY */
- speed = miiphy_speed (dev->name, reg);
- duplex = miiphy_duplex (dev->name, reg);
+get_speed:
+ if (reg == CONFIG_PHY_LESS) {
+ speed = CONFIG_PHY_LESS_SPEED;
+ duplex = CONFIG_PHY_LESS_DUPLEX;
+ } else {
+ speed = miiphy_speed(dev->name, reg);
+ duplex = miiphy_duplex(dev->name, reg);
+ }
if (hw_p->print_speed) {
hw_p->print_speed = 0;
diff --git a/cpu/ppc4xx/miiphy.c b/cpu/ppc4xx/miiphy.c
index c882720..d303598 100644
--- a/cpu/ppc4xx/miiphy.c
+++ b/cpu/ppc4xx/miiphy.c
@@ -180,8 +180,10 @@ int phy_setup_aneg (char *devname, unsigned char addr)
*
* sr: Currently on 460EX only EMAC0 works with MDIO, so we always
* return EMAC0 offset here
+ * vg: For 460EX/460GT if internal GPCS PHY address is specified
+ * return appropriate EMAC offset
*/
-unsigned int miiphy_getemac_offset (void)
+unsigned int miiphy_getemac_offset(u8 addr)
{
#if (defined(CONFIG_440) && \
!defined(CONFIG_440SP) && !defined(CONFIG_440SPE) && \
@@ -233,6 +235,39 @@ unsigned int miiphy_getemac_offset (void)
return 0x100;
#endif
+#if defined(CONFIG_460EX) || defined(CONFIG_460GT)
+ u32 mode_reg;
+ u32 eoffset = 0;
+
+ switch (addr) {
+#if defined(CONFIG_HAS_ETH1) && defined(CONFIG_GPCS_PHY1_ADDR)
+ case CONFIG_GPCS_PHY1_ADDR:
+ mode_reg = in_be32((void *)EMAC_M1 + 0x100);
+ if (addr == EMAC_M1_IPPA_GET(mode_reg))
+ eoffset = 0x100;
+ break;
+#endif
+#if defined(CONFIG_HAS_ETH2) && defined(CONFIG_GPCS_PHY2_ADDR)
+ case CONFIG_GPCS_PHY2_ADDR:
+ mode_reg = in_be32((void *)EMAC_M1 + 0x300);
+ if (addr == EMAC_M1_IPPA_GET(mode_reg))
+ eoffset = 0x300;
+ break;
+#endif
+#if defined(CONFIG_HAS_ETH3) && defined(CONFIG_GPCS_PHY3_ADDR)
+ case CONFIG_GPCS_PHY3_ADDR:
+ mode_reg = in_be32((void *)EMAC_M1 + 0x400);
+ if (addr == EMAC_M1_IPPA_GET(mode_reg))
+ eoffset = 0x400;
+ break;
+#endif
+ default:
+ eoffset = 0;
+ break;
+ }
+ return eoffset;
+#endif
+
return 0;
#endif
}
@@ -262,7 +297,7 @@ static int emac_miiphy_command(u8 addr, u8 reg, int cmd, u16 value)
u32 emac_reg;
u32 sta_reg;
- emac_reg = miiphy_getemac_offset();
+ emac_reg = miiphy_getemac_offset(addr);
/* wait for completion */
if (emac_miiphy_wait(emac_reg) != 0)
@@ -311,7 +346,7 @@ int emac4xx_miiphy_read (char *devname, unsigned char addr, unsigned char reg,
unsigned long sta_reg;
unsigned long emac_reg;
- emac_reg = miiphy_getemac_offset ();
+ emac_reg = miiphy_getemac_offset(addr);
if (emac_miiphy_command(addr, reg, EMAC_STACR_READ, 0) != 0)
return -1;
diff --git a/include/ppc4xx_enet.h b/include/ppc4xx_enet.h
index b74c6fc..00669a7 100644
--- a/include/ppc4xx_enet.h
+++ b/include/ppc4xx_enet.h
@@ -376,6 +376,7 @@ typedef struct emac_4xx_hw_st {
#define EMAC_M1_APP (0x08000000)
#define EMAC_M1_RSVD (0x06000000)
#define EMAC_M1_IST (0x01000000)
+#define EMAC_M1_MF_1000GPCS (0x00C00000)
#define EMAC_M1_MF_1000MBPS (0x00800000) /* 0's for 10MBPS */
#define EMAC_M1_MF_100MBPS (0x00400000)
#define EMAC_M1_RFS_MASK (0x00380000)
@@ -394,6 +395,8 @@ typedef struct emac_4xx_hw_st {
#define EMAC_M1_MWSW (0x00007000)
#define EMAC_M1_JUMBO_ENABLE (0x00000800)
#define EMAC_M1_IPPA (0x000007c0)
+#define EMAC_M1_IPPA_SET(id) (((id) & 0x1f) << 6)
+#define EMAC_M1_IPPA_GET(id) (((id) >> 6) & 0x1f)
#define EMAC_M1_OBCI_GT100 (0x00000020)
#define EMAC_M1_OBCI_100 (0x00000018)
#define EMAC_M1_OBCI_83 (0x00000010)
--
1.5.5
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