TI: DaVinci: Updating EMAC driver for DM365, DM646x and DA8XX
The EMAC IP on DM365, DM646x and DA830 is slightly different
from that on DM644x. This change updates the DaVinci EMAC driver
so that EMAC becomes operational on SOCs with EMAC v2.
Signed-off-by: Nick Thompson <nick.thompson@ge.com>
Signed-off-by: Ben Warren <biggerbadderben@gmail.com>
diff --git a/drivers/net/davinci_emac.c b/drivers/net/davinci_emac.c
index fa8cee4..02bbb8c 100644
--- a/drivers/net/davinci_emac.c
+++ b/drivers/net/davinci_emac.c
@@ -42,10 +42,17 @@
#include <miiphy.h>
#include <malloc.h>
#include <asm/arch/emac_defs.h>
+#include <asm/io.h>
unsigned int emac_dbg = 0;
#define debug_emac(fmt,args...) if (emac_dbg) printf(fmt,##args)
+#ifdef DAVINCI_EMAC_GIG_ENABLE
+#define emac_gigabit_enable() davinci_eth_gigabit_enable()
+#else
+#define emac_gigabit_enable() /* no gigabit to enable */
+#endif
+
static void davinci_eth_mdio_enable(void);
static int gen_init_phy(int phy_addr);
@@ -99,12 +106,14 @@
clkdiv = (EMAC_MDIO_BUS_FREQ / EMAC_MDIO_CLOCK_FREQ) - 1;
- adap_mdio->CONTROL = (clkdiv & 0xff) |
- MDIO_CONTROL_ENABLE |
- MDIO_CONTROL_FAULT |
- MDIO_CONTROL_FAULT_ENABLE;
+ writel((clkdiv & 0xff) |
+ MDIO_CONTROL_ENABLE |
+ MDIO_CONTROL_FAULT |
+ MDIO_CONTROL_FAULT_ENABLE,
+ &adap_mdio->CONTROL);
- while (adap_mdio->CONTROL & MDIO_CONTROL_IDLE) {;}
+ while (readl(&adap_mdio->CONTROL) & MDIO_CONTROL_IDLE)
+ ;
}
/*
@@ -119,7 +128,8 @@
active_phy_addr = 0xff;
- if ((phy_act_state = adap_mdio->ALIVE) == 0)
+ phy_act_state = readl(&adap_mdio->ALIVE) & EMAC_MDIO_PHY_MASK;
+ if (phy_act_state == 0)
return(0); /* No active PHYs */
debug_emac("davinci_eth_phy_detect(), ALIVE = 0x%08x\n", phy_act_state);
@@ -144,15 +154,18 @@
{
int tmp;
- while (adap_mdio->USERACCESS0 & MDIO_USERACCESS0_GO) {;}
+ while (readl(&adap_mdio->USERACCESS0) & MDIO_USERACCESS0_GO)
+ ;
- adap_mdio->USERACCESS0 = MDIO_USERACCESS0_GO |
- MDIO_USERACCESS0_WRITE_READ |
- ((reg_num & 0x1f) << 21) |
- ((phy_addr & 0x1f) << 16);
+ writel(MDIO_USERACCESS0_GO |
+ MDIO_USERACCESS0_WRITE_READ |
+ ((reg_num & 0x1f) << 21) |
+ ((phy_addr & 0x1f) << 16),
+ &adap_mdio->USERACCESS0);
/* Wait for command to complete */
- while ((tmp = adap_mdio->USERACCESS0) & MDIO_USERACCESS0_GO) {;}
+ while ((tmp = readl(&adap_mdio->USERACCESS0)) & MDIO_USERACCESS0_GO)
+ ;
if (tmp & MDIO_USERACCESS0_ACK) {
*data = tmp & 0xffff;
@@ -167,16 +180,19 @@
int davinci_eth_phy_write(u_int8_t phy_addr, u_int8_t reg_num, u_int16_t data)
{
- while (adap_mdio->USERACCESS0 & MDIO_USERACCESS0_GO) {;}
+ while (readl(&adap_mdio->USERACCESS0) & MDIO_USERACCESS0_GO)
+ ;
- adap_mdio->USERACCESS0 = MDIO_USERACCESS0_GO |
- MDIO_USERACCESS0_WRITE_WRITE |
- ((reg_num & 0x1f) << 21) |
- ((phy_addr & 0x1f) << 16) |
- (data & 0xffff);
+ writel(MDIO_USERACCESS0_GO |
+ MDIO_USERACCESS0_WRITE_WRITE |
+ ((reg_num & 0x1f) << 21) |
+ ((phy_addr & 0x1f) << 16) |
+ (data & 0xffff),
+ &adap_mdio->USERACCESS0);
/* Wait for command to complete */
- while (adap_mdio->USERACCESS0 & MDIO_USERACCESS0_GO) {;}
+ while (readl(&adap_mdio->USERACCESS0) & MDIO_USERACCESS0_GO)
+ ;
return(1);
}
@@ -245,9 +261,24 @@
{
return(davinci_eth_phy_write(addr, reg, value) ? 0 : 1);
}
-
#endif
+static void __attribute__((unused)) davinci_eth_gigabit_enable(void)
+{
+ u_int16_t data;
+
+ if (davinci_eth_phy_read(EMAC_MDIO_PHY_NUM, 0, &data)) {
+ if (data & (1 << 6)) { /* speed selection MSB */
+ /*
+ * Check if link detected is giga-bit
+ * If Gigabit mode detected, enable gigbit in MAC
+ */
+ writel(EMAC_MACCONTROL_GIGFORCE |
+ EMAC_MACCONTROL_GIGABIT_ENABLE,
+ &adap_emac->MACCONTROL);
+ }
+ }
+}
/* Eth device open */
static int davinci_eth_open(struct eth_device *dev, bd_t *bis)
@@ -255,64 +286,73 @@
dv_reg_p addr;
u_int32_t clkdiv, cnt;
volatile emac_desc *rx_desc;
+ unsigned long mac_hi;
+ unsigned long mac_lo;
debug_emac("+ emac_open\n");
/* Reset EMAC module and disable interrupts in wrapper */
- adap_emac->SOFTRESET = 1;
- while (adap_emac->SOFTRESET != 0) {;}
- adap_ewrap->EWCTL = 0;
+ writel(1, &adap_emac->SOFTRESET);
+ while (readl(&adap_emac->SOFTRESET) != 0)
+ ;
+#if defined(DAVINCI_EMAC_VERSION2)
+ writel(1, &adap_ewrap->softrst);
+ while (readl(&adap_ewrap->softrst) != 0)
+ ;
+#else
+ writel(0, &adap_ewrap->EWCTL);
for (cnt = 0; cnt < 5; cnt++) {
- clkdiv = adap_ewrap->EWCTL;
+ clkdiv = readl(&adap_ewrap->EWCTL);
}
+#endif
rx_desc = emac_rx_desc;
- adap_emac->TXCONTROL = 0x01;
- adap_emac->RXCONTROL = 0x01;
+ writel(1, &adap_emac->TXCONTROL);
+ writel(1, &adap_emac->RXCONTROL);
/* Set MAC Addresses & Init multicast Hash to 0 (disable any multicast receive) */
/* Using channel 0 only - other channels are disabled */
- adap_emac->MACINDEX = 0;
- adap_emac->MACADDRHI =
- (davinci_eth_mac_addr[3] << 24) |
- (davinci_eth_mac_addr[2] << 16) |
- (davinci_eth_mac_addr[1] << 8) |
- (davinci_eth_mac_addr[0]);
- adap_emac->MACADDRLO =
- (davinci_eth_mac_addr[5] << 8) |
- (davinci_eth_mac_addr[4]);
+ writel(0, &adap_emac->MACINDEX);
+ mac_hi = (davinci_eth_mac_addr[3] << 24) |
+ (davinci_eth_mac_addr[2] << 16) |
+ (davinci_eth_mac_addr[1] << 8) |
+ (davinci_eth_mac_addr[0]);
+ mac_lo = (davinci_eth_mac_addr[5] << 8) |
+ (davinci_eth_mac_addr[4]);
- adap_emac->MACHASH1 = 0;
- adap_emac->MACHASH2 = 0;
+ writel(mac_hi, &adap_emac->MACADDRHI);
+#if defined(DAVINCI_EMAC_VERSION2)
+ writel(mac_lo | EMAC_MAC_ADDR_IS_VALID | EMAC_MAC_ADDR_MATCH,
+ &adap_emac->MACADDRLO);
+#else
+ writel(mac_lo, &adap_emac->MACADDRLO);
+#endif
+
+ writel(0, &adap_emac->MACHASH1);
+ writel(0, &adap_emac->MACHASH2);
/* Set source MAC address - REQUIRED */
- adap_emac->MACSRCADDRHI =
- (davinci_eth_mac_addr[3] << 24) |
- (davinci_eth_mac_addr[2] << 16) |
- (davinci_eth_mac_addr[1] << 8) |
- (davinci_eth_mac_addr[0]);
- adap_emac->MACSRCADDRLO =
- (davinci_eth_mac_addr[4] << 8) |
- (davinci_eth_mac_addr[5]);
+ writel(mac_hi, &adap_emac->MACSRCADDRHI);
+ writel(mac_lo, &adap_emac->MACSRCADDRLO);
/* Set DMA 8 TX / 8 RX Head pointers to 0 */
addr = &adap_emac->TX0HDP;
for(cnt = 0; cnt < 16; cnt++)
- *addr++ = 0;
+ writel(0, addr++);
addr = &adap_emac->RX0HDP;
for(cnt = 0; cnt < 16; cnt++)
- *addr++ = 0;
+ writel(0, addr++);
/* Clear Statistics (do this before setting MacControl register) */
addr = &adap_emac->RXGOODFRAMES;
for(cnt = 0; cnt < EMAC_NUM_STATS; cnt++)
- *addr++ = 0;
+ writel(0, addr++);
/* No multicast addressing */
- adap_emac->MACHASH1 = 0;
- adap_emac->MACHASH2 = 0;
+ writel(0, &adap_emac->MACHASH1);
+ writel(0, &adap_emac->MACHASH2);
/* Create RX queue and set receive process in place */
emac_rx_active_head = emac_rx_desc;
@@ -324,34 +364,52 @@
rx_desc++;
}
- /* Set the last descriptor's "next" parameter to 0 to end the RX desc list */
+ /* Finalize the rx desc list */
rx_desc--;
rx_desc->next = 0;
emac_rx_active_tail = rx_desc;
emac_rx_queue_active = 1;
/* Enable TX/RX */
- adap_emac->RXMAXLEN = EMAC_MAX_ETHERNET_PKT_SIZE;
- adap_emac->RXBUFFEROFFSET = 0;
+ writel(EMAC_MAX_ETHERNET_PKT_SIZE, &adap_emac->RXMAXLEN);
+ writel(0, &adap_emac->RXBUFFEROFFSET);
- /* No fancy configs - Use this for promiscous for debug - EMAC_RXMBPENABLE_RXCAFEN_ENABLE */
- adap_emac->RXMBPENABLE = EMAC_RXMBPENABLE_RXBROADEN;
+ /*
+ * No fancy configs - Use this for promiscous debug
+ * - EMAC_RXMBPENABLE_RXCAFEN_ENABLE
+ */
+ writel(EMAC_RXMBPENABLE_RXBROADEN, &adap_emac->RXMBPENABLE);
/* Enable ch 0 only */
- adap_emac->RXUNICASTSET = 0x01;
+ writel(1, &adap_emac->RXUNICASTSET);
/* Enable MII interface and Full duplex mode */
- adap_emac->MACCONTROL = (EMAC_MACCONTROL_MIIEN_ENABLE | EMAC_MACCONTROL_FULLDUPLEX_ENABLE);
+#ifdef CONFIG_SOC_DA8XX
+ writel((EMAC_MACCONTROL_MIIEN_ENABLE |
+ EMAC_MACCONTROL_FULLDUPLEX_ENABLE |
+ EMAC_MACCONTROL_RMIISPEED_100),
+ &adap_emac->MACCONTROL);
+#else
+ writel((EMAC_MACCONTROL_MIIEN_ENABLE |
+ EMAC_MACCONTROL_FULLDUPLEX_ENABLE),
+ &adap_emac->MACCONTROL);
+#endif
/* Init MDIO & get link state */
clkdiv = (EMAC_MDIO_BUS_FREQ / EMAC_MDIO_CLOCK_FREQ) - 1;
- adap_mdio->CONTROL = ((clkdiv & 0xff) | MDIO_CONTROL_ENABLE | MDIO_CONTROL_FAULT);
+ writel((clkdiv & 0xff) | MDIO_CONTROL_ENABLE | MDIO_CONTROL_FAULT,
+ &adap_mdio->CONTROL);
+
+ /* We need to wait for MDIO to start */
+ udelay(1000);
if (!phy.get_link_speed(active_phy_addr))
return(0);
+ emac_gigabit_enable();
+
/* Start receive process */
- adap_emac->RX0HDP = (u_int32_t)emac_rx_desc;
+ writel((u_int32_t)emac_rx_desc, &adap_emac->RX0HDP);
debug_emac("- emac_open\n");
@@ -368,34 +426,42 @@
if (ch == EMAC_CH_TX) {
/* Init TX channel teardown */
- adap_emac->TXTEARDOWN = 1;
- for(cnt = 0; cnt != 0xfffffffc; cnt = adap_emac->TX0CP) {
- /* Wait here for Tx teardown completion interrupt to occur
- * Note: A task delay can be called here to pend rather than
- * occupying CPU cycles - anyway it has been found that teardown
- * takes very few cpu cycles and does not affect functionality */
- dly--;
- udelay(1);
- if (dly == 0)
+ writel(1, &adap_emac->TXTEARDOWN);
+ do {
+ /*
+ * Wait here for Tx teardown completion interrupt to
+ * occur. Note: A task delay can be called here to pend
+ * rather than occupying CPU cycles - anyway it has
+ * been found that teardown takes very few cpu cycles
+ * and does not affect functionality
+ */
+ dly--;
+ udelay(1);
+ if (dly == 0)
break;
- }
- adap_emac->TX0CP = cnt;
- adap_emac->TX0HDP = 0;
+ cnt = readl(&adap_emac->TX0CP);
+ } while (cnt != 0xfffffffc);
+ writel(cnt, &adap_emac->TX0CP);
+ writel(0, &adap_emac->TX0HDP);
} else {
/* Init RX channel teardown */
- adap_emac->RXTEARDOWN = 1;
- for(cnt = 0; cnt != 0xfffffffc; cnt = adap_emac->RX0CP) {
- /* Wait here for Rx teardown completion interrupt to occur
- * Note: A task delay can be called here to pend rather than
- * occupying CPU cycles - anyway it has been found that teardown
- * takes very few cpu cycles and does not affect functionality */
- dly--;
- udelay(1);
- if (dly == 0)
+ writel(1, &adap_emac->RXTEARDOWN);
+ do {
+ /*
+ * Wait here for Rx teardown completion interrupt to
+ * occur. Note: A task delay can be called here to pend
+ * rather than occupying CPU cycles - anyway it has
+ * been found that teardown takes very few cpu cycles
+ * and does not affect functionality
+ */
+ dly--;
+ udelay(1);
+ if (dly == 0)
break;
- }
- adap_emac->RX0CP = cnt;
- adap_emac->RX0HDP = 0;
+ cnt = readl(&adap_emac->RX0CP);
+ } while (cnt != 0xfffffffc);
+ writel(cnt, &adap_emac->RX0CP);
+ writel(0, &adap_emac->RX0HDP);
}
debug_emac("- emac_ch_teardown\n");
@@ -410,8 +476,12 @@
davinci_eth_ch_teardown(EMAC_CH_RX); /* RX Channel teardown */
/* Reset EMAC module and disable interrupts in wrapper */
- adap_emac->SOFTRESET = 1;
- adap_ewrap->EWCTL = 0;
+ writel(1, &adap_emac->SOFTRESET);
+#if defined(DAVINCI_EMAC_VERSION2)
+ writel(1, &adap_ewrap->softrst);
+#else
+ writel(0, &adap_ewrap->EWCTL);
+#endif
debug_emac("- emac_close\n");
}
@@ -435,6 +505,8 @@
return (ret_status);
}
+ emac_gigabit_enable();
+
/* Check packet size and if < EMAC_MIN_ETHERNET_PKT_SIZE, pad it up */
if (length < EMAC_MIN_ETHERNET_PKT_SIZE) {
length = EMAC_MIN_ETHERNET_PKT_SIZE;
@@ -449,7 +521,7 @@
EMAC_CPPI_OWNERSHIP_BIT |
EMAC_CPPI_EOP_BIT);
/* Send the packet */
- adap_emac->TX0HDP = (unsigned int) emac_tx_desc;
+ writel((unsigned long)emac_tx_desc, &adap_emac->TX0HDP);
/* Wait for packet to complete or link down */
while (1) {
@@ -457,7 +529,10 @@
davinci_eth_ch_teardown (EMAC_CH_TX);
return (ret_status);
}
- if (adap_emac->TXINTSTATRAW & 0x01) {
+
+ emac_gigabit_enable();
+
+ if (readl(&adap_emac->TXINTSTATRAW) & 0x01) {
ret_status = length;
break;
}
@@ -490,15 +565,15 @@
}
/* Ack received packet descriptor */
- adap_emac->RX0CP = (unsigned int) rx_curr_desc;
+ writel((unsigned long)rx_curr_desc, &adap_emac->RX0CP);
curr_desc = rx_curr_desc;
emac_rx_active_head =
(volatile emac_desc *) rx_curr_desc->next;
if (status & EMAC_CPPI_EOQ_BIT) {
if (emac_rx_active_head) {
- adap_emac->RX0HDP =
- (unsigned int) emac_rx_active_head;
+ writel((unsigned long)emac_rx_active_head,
+ &adap_emac->RX0HDP);
} else {
emac_rx_queue_active = 0;
printf ("INFO:emac_rcv_packet: RX Queue not active\n");
@@ -515,8 +590,8 @@
emac_rx_active_head = curr_desc;
emac_rx_active_tail = curr_desc;
if (emac_rx_queue_active != 0) {
- adap_emac->RX0HDP =
- (unsigned int) emac_rx_active_head;
+ writel((unsigned long)emac_rx_active_head,
+ &adap_emac->RX0HDP);
printf ("INFO: emac_rcv_pkt: active queue head = 0, HDP fired\n");
emac_rx_queue_active = 1;
}
@@ -526,7 +601,8 @@
tail_desc->next = (unsigned int) curr_desc;
status = tail_desc->pkt_flag_len;
if (status & EMAC_CPPI_EOQ_BIT) {
- adap_emac->RX0HDP = (unsigned int) curr_desc;
+ writel((unsigned long)curr_desc,
+ &adap_emac->RX0HDP);
status &= ~EMAC_CPPI_EOQ_BIT;
tail_desc->pkt_flag_len = status;
}
@@ -566,7 +642,7 @@
davinci_eth_mdio_enable();
for (i = 0; i < 256; i++) {
- if (adap_mdio->ALIVE)
+ if (readl(&adap_mdio->ALIVE))
break;
udelay(10);
}