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https://github.com/AsahiLinux/u-boot
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c08d4d792a
The SMC911x Ethernet MACs can be integrated using a 16 or 32-bit bus. The driver needs to know about this choice, which is the reason for us having a Kconfig symbol for that. Now this bus width is already described using a devicetree property, and since the driver is DM compliant and is using the DT now, we should query this at runtime. We leave the Kconfig choice around, in case the DT is missing this property. Signed-off-by: Andre Przywara <andre.przywara@arm.com> Reviewed-by: Ramon Fried <rfried.dev@gmail.com>
645 lines
14 KiB
C
645 lines
14 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* SMSC LAN9[12]1[567] Network driver
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*
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* (c) 2007 Pengutronix, Sascha Hauer <s.hauer@pengutronix.de>
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*/
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#include <common.h>
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#include <command.h>
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#include <malloc.h>
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#include <net.h>
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#include <miiphy.h>
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#include <linux/io.h>
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#include <linux/delay.h>
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#include <linux/types.h>
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#include "smc911x.h"
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struct chip_id {
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u16 id;
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char *name;
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};
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struct smc911x_priv {
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#ifndef CONFIG_DM_ETH
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struct eth_device dev;
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#endif
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phys_addr_t iobase;
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const struct chip_id *chipid;
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unsigned char enetaddr[6];
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bool use_32_bit_io;
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};
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static const struct chip_id chip_ids[] = {
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{ CHIP_89218, "LAN89218" },
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{ CHIP_9115, "LAN9115" },
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{ CHIP_9116, "LAN9116" },
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{ CHIP_9117, "LAN9117" },
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{ CHIP_9118, "LAN9118" },
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{ CHIP_9211, "LAN9211" },
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{ CHIP_9215, "LAN9215" },
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{ CHIP_9216, "LAN9216" },
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{ CHIP_9217, "LAN9217" },
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{ CHIP_9218, "LAN9218" },
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{ CHIP_9220, "LAN9220" },
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{ CHIP_9221, "LAN9221" },
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{ 0, NULL },
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};
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#define DRIVERNAME "smc911x"
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static u32 smc911x_reg_read(struct smc911x_priv *priv, u32 offset)
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{
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if (priv->use_32_bit_io)
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return readl(priv->iobase + offset);
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return (readw(priv->iobase + offset) & 0xffff) |
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(readw(priv->iobase + offset + 2) << 16);
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}
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static void smc911x_reg_write(struct smc911x_priv *priv, u32 offset, u32 val)
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{
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if (priv->use_32_bit_io) {
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writel(val, priv->iobase + offset);
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} else {
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writew(val & 0xffff, priv->iobase + offset);
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writew(val >> 16, priv->iobase + offset + 2);
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}
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}
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static u32 smc911x_get_mac_csr(struct smc911x_priv *priv, u8 reg)
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{
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while (smc911x_reg_read(priv, MAC_CSR_CMD) & MAC_CSR_CMD_CSR_BUSY)
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;
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smc911x_reg_write(priv, MAC_CSR_CMD,
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MAC_CSR_CMD_CSR_BUSY | MAC_CSR_CMD_R_NOT_W | reg);
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while (smc911x_reg_read(priv, MAC_CSR_CMD) & MAC_CSR_CMD_CSR_BUSY)
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;
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return smc911x_reg_read(priv, MAC_CSR_DATA);
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}
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static void smc911x_set_mac_csr(struct smc911x_priv *priv, u8 reg, u32 data)
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{
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while (smc911x_reg_read(priv, MAC_CSR_CMD) & MAC_CSR_CMD_CSR_BUSY)
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;
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smc911x_reg_write(priv, MAC_CSR_DATA, data);
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smc911x_reg_write(priv, MAC_CSR_CMD, MAC_CSR_CMD_CSR_BUSY | reg);
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while (smc911x_reg_read(priv, MAC_CSR_CMD) & MAC_CSR_CMD_CSR_BUSY)
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;
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}
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static int smc911x_detect_chip(struct smc911x_priv *priv)
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{
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unsigned long val, i;
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val = smc911x_reg_read(priv, BYTE_TEST);
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if (val == 0xffffffff) {
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/* Special case -- no chip present */
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return -1;
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} else if (val != 0x87654321) {
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printf(DRIVERNAME ": Invalid chip endian 0x%08lx\n", val);
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return -1;
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}
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val = smc911x_reg_read(priv, ID_REV) >> 16;
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for (i = 0; chip_ids[i].id != 0; i++) {
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if (chip_ids[i].id == val) break;
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}
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if (!chip_ids[i].id) {
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printf(DRIVERNAME ": Unknown chip ID %04lx\n", val);
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return -1;
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}
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priv->chipid = &chip_ids[i];
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return 0;
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}
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static void smc911x_reset(struct smc911x_priv *priv)
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{
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int timeout;
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/*
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* Take out of PM setting first
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* Device is already wake up if PMT_CTRL_READY bit is set
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*/
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if ((smc911x_reg_read(priv, PMT_CTRL) & PMT_CTRL_READY) == 0) {
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/* Write to the bytetest will take out of powerdown */
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smc911x_reg_write(priv, BYTE_TEST, 0x0);
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timeout = 10;
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while (timeout-- &&
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!(smc911x_reg_read(priv, PMT_CTRL) & PMT_CTRL_READY))
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udelay(10);
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if (timeout < 0) {
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printf(DRIVERNAME
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": timeout waiting for PM restore\n");
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return;
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}
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}
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/* Disable interrupts */
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smc911x_reg_write(priv, INT_EN, 0);
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smc911x_reg_write(priv, HW_CFG, HW_CFG_SRST);
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timeout = 1000;
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while (timeout-- && smc911x_reg_read(priv, E2P_CMD) & E2P_CMD_EPC_BUSY)
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udelay(10);
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if (timeout < 0) {
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printf(DRIVERNAME ": reset timeout\n");
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return;
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}
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/* Reset the FIFO level and flow control settings */
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smc911x_set_mac_csr(priv, FLOW, FLOW_FCPT | FLOW_FCEN);
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smc911x_reg_write(priv, AFC_CFG, 0x0050287F);
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/* Set to LED outputs */
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smc911x_reg_write(priv, GPIO_CFG, 0x70070000);
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}
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static void smc911x_handle_mac_address(struct smc911x_priv *priv)
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{
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unsigned long addrh, addrl;
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unsigned char *m = priv->enetaddr;
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addrl = m[0] | (m[1] << 8) | (m[2] << 16) | (m[3] << 24);
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addrh = m[4] | (m[5] << 8);
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smc911x_set_mac_csr(priv, ADDRL, addrl);
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smc911x_set_mac_csr(priv, ADDRH, addrh);
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printf(DRIVERNAME ": MAC %pM\n", m);
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}
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static bool smc911x_read_mac_address(struct smc911x_priv *priv)
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{
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u32 addrh, addrl;
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/* address is obtained from optional eeprom */
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addrh = smc911x_get_mac_csr(priv, ADDRH);
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addrl = smc911x_get_mac_csr(priv, ADDRL);
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if (addrl == 0xffffffff && addrh == 0x0000ffff)
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return false;
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priv->enetaddr[0] = addrl;
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priv->enetaddr[1] = addrl >> 8;
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priv->enetaddr[2] = addrl >> 16;
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priv->enetaddr[3] = addrl >> 24;
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priv->enetaddr[4] = addrh;
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priv->enetaddr[5] = addrh >> 8;
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return true;
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}
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static int smc911x_eth_phy_read(struct smc911x_priv *priv,
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u8 phy, u8 reg, u16 *val)
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{
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while (smc911x_get_mac_csr(priv, MII_ACC) & MII_ACC_MII_BUSY)
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;
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smc911x_set_mac_csr(priv, MII_ACC, phy << 11 | reg << 6 |
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MII_ACC_MII_BUSY);
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while (smc911x_get_mac_csr(priv, MII_ACC) & MII_ACC_MII_BUSY)
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;
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*val = smc911x_get_mac_csr(priv, MII_DATA);
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return 0;
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}
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static int smc911x_eth_phy_write(struct smc911x_priv *priv,
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u8 phy, u8 reg, u16 val)
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{
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while (smc911x_get_mac_csr(priv, MII_ACC) & MII_ACC_MII_BUSY)
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;
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smc911x_set_mac_csr(priv, MII_DATA, val);
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smc911x_set_mac_csr(priv, MII_ACC,
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phy << 11 | reg << 6 | MII_ACC_MII_BUSY | MII_ACC_MII_WRITE);
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while (smc911x_get_mac_csr(priv, MII_ACC) & MII_ACC_MII_BUSY)
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;
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return 0;
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}
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static int smc911x_phy_reset(struct smc911x_priv *priv)
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{
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u32 reg;
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reg = smc911x_reg_read(priv, PMT_CTRL);
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reg &= ~0xfffff030;
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reg |= PMT_CTRL_PHY_RST;
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smc911x_reg_write(priv, PMT_CTRL, reg);
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mdelay(100);
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return 0;
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}
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static void smc911x_phy_configure(struct smc911x_priv *priv)
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{
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int timeout;
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u16 status;
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smc911x_phy_reset(priv);
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smc911x_eth_phy_write(priv, 1, MII_BMCR, BMCR_RESET);
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mdelay(1);
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smc911x_eth_phy_write(priv, 1, MII_ADVERTISE, 0x01e1);
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smc911x_eth_phy_write(priv, 1, MII_BMCR, BMCR_ANENABLE |
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BMCR_ANRESTART);
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timeout = 5000;
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do {
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mdelay(1);
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if ((timeout--) == 0)
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goto err_out;
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if (smc911x_eth_phy_read(priv, 1, MII_BMSR, &status) != 0)
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goto err_out;
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} while (!(status & BMSR_LSTATUS));
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printf(DRIVERNAME ": phy initialized\n");
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return;
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err_out:
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printf(DRIVERNAME ": autonegotiation timed out\n");
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}
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static void smc911x_enable(struct smc911x_priv *priv)
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{
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/* Enable TX */
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smc911x_reg_write(priv, HW_CFG, 8 << 16 | HW_CFG_SF);
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smc911x_reg_write(priv, GPT_CFG, GPT_CFG_TIMER_EN | 10000);
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smc911x_reg_write(priv, TX_CFG, TX_CFG_TX_ON);
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/* no padding to start of packets */
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smc911x_reg_write(priv, RX_CFG, 0);
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smc911x_set_mac_csr(priv, MAC_CR, MAC_CR_TXEN | MAC_CR_RXEN |
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MAC_CR_HBDIS);
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}
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static int smc911x_init_common(struct smc911x_priv *priv)
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{
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const struct chip_id *id = priv->chipid;
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printf(DRIVERNAME ": detected %s controller\n", id->name);
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smc911x_reset(priv);
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/* Configure the PHY, initialize the link state */
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smc911x_phy_configure(priv);
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smc911x_handle_mac_address(priv);
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/* Turn on Tx + Rx */
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smc911x_enable(priv);
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return 0;
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}
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static int smc911x_send_common(struct smc911x_priv *priv,
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void *packet, int length)
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{
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u32 *data = (u32*)packet;
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u32 tmplen;
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u32 status;
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smc911x_reg_write(priv, TX_DATA_FIFO, TX_CMD_A_INT_FIRST_SEG |
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TX_CMD_A_INT_LAST_SEG | length);
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smc911x_reg_write(priv, TX_DATA_FIFO, length);
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tmplen = (length + 3) / 4;
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while (tmplen--)
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smc911x_reg_write(priv, TX_DATA_FIFO, *data++);
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/* wait for transmission */
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while (!((smc911x_reg_read(priv, TX_FIFO_INF) &
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TX_FIFO_INF_TSUSED) >> 16));
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/* get status. Ignore 'no carrier' error, it has no meaning for
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* full duplex operation
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*/
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status = smc911x_reg_read(priv, TX_STATUS_FIFO) &
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(TX_STS_LOC | TX_STS_LATE_COLL | TX_STS_MANY_COLL |
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TX_STS_MANY_DEFER | TX_STS_UNDERRUN);
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if (!status)
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return 0;
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printf(DRIVERNAME ": failed to send packet: %s%s%s%s%s\n",
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status & TX_STS_LOC ? "TX_STS_LOC " : "",
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status & TX_STS_LATE_COLL ? "TX_STS_LATE_COLL " : "",
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status & TX_STS_MANY_COLL ? "TX_STS_MANY_COLL " : "",
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status & TX_STS_MANY_DEFER ? "TX_STS_MANY_DEFER " : "",
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status & TX_STS_UNDERRUN ? "TX_STS_UNDERRUN" : "");
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return -1;
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}
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static void smc911x_halt_common(struct smc911x_priv *priv)
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{
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smc911x_reset(priv);
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smc911x_handle_mac_address(priv);
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}
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static int smc911x_recv_common(struct smc911x_priv *priv, u32 *data)
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{
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u32 pktlen, tmplen;
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u32 status;
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status = smc911x_reg_read(priv, RX_FIFO_INF);
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if (!(status & RX_FIFO_INF_RXSUSED))
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return 0;
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status = smc911x_reg_read(priv, RX_STATUS_FIFO);
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pktlen = (status & RX_STS_PKT_LEN) >> 16;
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smc911x_reg_write(priv, RX_CFG, 0);
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tmplen = (pktlen + 3) / 4;
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while (tmplen--)
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*data++ = smc911x_reg_read(priv, RX_DATA_FIFO);
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if (status & RX_STS_ES) {
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printf(DRIVERNAME
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": dropped bad packet. Status: 0x%08x\n",
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status);
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return 0;
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}
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return pktlen;
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}
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#ifndef CONFIG_DM_ETH
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#if defined(CONFIG_MII) || defined(CONFIG_CMD_MII)
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/* wrapper for smc911x_eth_phy_read */
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static int smc911x_miiphy_read(struct mii_dev *bus, int phy, int devad,
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int reg)
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{
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struct eth_device *dev = eth_get_dev_by_name(bus->name);
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struct smc911x_priv *priv = container_of(dev, struct smc911x_priv, dev);
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u16 val = 0;
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int ret;
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if (!dev || !priv)
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return -ENODEV;
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ret = smc911x_eth_phy_read(priv, phy, reg, &val);
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if (ret < 0)
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return ret;
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return val;
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}
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/* wrapper for smc911x_eth_phy_write */
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static int smc911x_miiphy_write(struct mii_dev *bus, int phy, int devad,
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int reg, u16 val)
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{
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struct eth_device *dev = eth_get_dev_by_name(bus->name);
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struct smc911x_priv *priv = container_of(dev, struct smc911x_priv, dev);
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if (!dev || !priv)
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return -ENODEV;
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return smc911x_eth_phy_write(priv, phy, reg, val);
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}
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static int smc911x_initialize_mii(struct smc911x_priv *priv)
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{
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struct mii_dev *mdiodev = mdio_alloc();
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int ret;
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if (!mdiodev)
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return -ENOMEM;
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strncpy(mdiodev->name, priv->dev.name, MDIO_NAME_LEN);
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mdiodev->read = smc911x_miiphy_read;
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mdiodev->write = smc911x_miiphy_write;
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ret = mdio_register(mdiodev);
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if (ret < 0) {
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mdio_free(mdiodev);
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return ret;
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}
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return 0;
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}
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#else
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static int smc911x_initialize_mii(struct smc911x_priv *priv)
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{
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return 0;
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}
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#endif
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static int smc911x_init(struct eth_device *dev, struct bd_info *bd)
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{
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struct smc911x_priv *priv = container_of(dev, struct smc911x_priv, dev);
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return smc911x_init_common(priv);
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}
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static void smc911x_halt(struct eth_device *dev)
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{
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struct smc911x_priv *priv = container_of(dev, struct smc911x_priv, dev);
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smc911x_halt_common(priv);
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}
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static int smc911x_send(struct eth_device *dev, void *packet, int length)
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{
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struct smc911x_priv *priv = container_of(dev, struct smc911x_priv, dev);
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return smc911x_send_common(priv, packet, length);
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}
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static int smc911x_recv(struct eth_device *dev)
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{
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struct smc911x_priv *priv = container_of(dev, struct smc911x_priv, dev);
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u32 *data = (u32 *)net_rx_packets[0];
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int ret;
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ret = smc911x_recv_common(priv, data);
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if (ret)
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net_process_received_packet(net_rx_packets[0], ret);
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return ret;
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}
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int smc911x_initialize(u8 dev_num, int base_addr)
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{
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struct smc911x_priv *priv;
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int ret;
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|
priv = calloc(1, sizeof(*priv));
|
|
if (!priv)
|
|
return -ENOMEM;
|
|
|
|
priv->iobase = base_addr;
|
|
priv->dev.iobase = base_addr;
|
|
|
|
priv->use_32_bit_io = CONFIG_IS_ENABLED(SMC911X_32_BIT);
|
|
|
|
/* Try to detect chip. Will fail if not present. */
|
|
ret = smc911x_detect_chip(priv);
|
|
if (ret) {
|
|
ret = 0; /* Card not detected is not an error */
|
|
goto err_detect;
|
|
}
|
|
|
|
if (smc911x_read_mac_address(priv))
|
|
memcpy(priv->dev.enetaddr, priv->enetaddr, 6);
|
|
|
|
priv->dev.init = smc911x_init;
|
|
priv->dev.halt = smc911x_halt;
|
|
priv->dev.send = smc911x_send;
|
|
priv->dev.recv = smc911x_recv;
|
|
sprintf(priv->dev.name, "%s-%hu", DRIVERNAME, dev_num);
|
|
|
|
eth_register(&priv->dev);
|
|
|
|
ret = smc911x_initialize_mii(priv);
|
|
if (ret)
|
|
goto err_mii;
|
|
|
|
return 1;
|
|
|
|
err_mii:
|
|
eth_unregister(&priv->dev);
|
|
err_detect:
|
|
free(priv);
|
|
return ret;
|
|
}
|
|
|
|
#else /* ifdef CONFIG_DM_ETH */
|
|
|
|
static int smc911x_start(struct udevice *dev)
|
|
{
|
|
struct eth_pdata *plat = dev_get_plat(dev);
|
|
struct smc911x_priv *priv = dev_get_priv(dev);
|
|
|
|
memcpy(priv->enetaddr, plat->enetaddr, sizeof(plat->enetaddr));
|
|
|
|
return smc911x_init_common(priv);
|
|
}
|
|
|
|
static void smc911x_stop(struct udevice *dev)
|
|
{
|
|
struct smc911x_priv *priv = dev_get_priv(dev);
|
|
|
|
smc911x_halt_common(priv);
|
|
}
|
|
|
|
static int smc911x_send(struct udevice *dev, void *packet, int length)
|
|
{
|
|
struct smc911x_priv *priv = dev_get_priv(dev);
|
|
int ret;
|
|
|
|
ret = smc911x_send_common(priv, packet, length);
|
|
|
|
return ret ? 0 : -ETIMEDOUT;
|
|
}
|
|
|
|
static int smc911x_recv(struct udevice *dev, int flags, uchar **packetp)
|
|
{
|
|
struct smc911x_priv *priv = dev_get_priv(dev);
|
|
u32 *data = (u32 *)net_rx_packets[0];
|
|
int ret;
|
|
|
|
ret = smc911x_recv_common(priv, data);
|
|
if (ret)
|
|
*packetp = (void *)data;
|
|
|
|
return ret ? ret : -EAGAIN;
|
|
}
|
|
|
|
static int smc911x_read_rom_hwaddr(struct udevice *dev)
|
|
{
|
|
struct smc911x_priv *priv = dev_get_priv(dev);
|
|
struct eth_pdata *pdata = dev_get_plat(dev);
|
|
|
|
if (!smc911x_read_mac_address(priv))
|
|
return -ENODEV;
|
|
|
|
memcpy(pdata->enetaddr, priv->enetaddr, sizeof(pdata->enetaddr));
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int smc911x_bind(struct udevice *dev)
|
|
{
|
|
return device_set_name(dev, dev->name);
|
|
}
|
|
|
|
static int smc911x_probe(struct udevice *dev)
|
|
{
|
|
struct smc911x_priv *priv = dev_get_priv(dev);
|
|
int ret;
|
|
|
|
/* Try to detect chip. Will fail if not present. */
|
|
ret = smc911x_detect_chip(priv);
|
|
if (ret)
|
|
return ret;
|
|
|
|
smc911x_read_rom_hwaddr(dev);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int smc911x_of_to_plat(struct udevice *dev)
|
|
{
|
|
struct smc911x_priv *priv = dev_get_priv(dev);
|
|
struct eth_pdata *pdata = dev_get_plat(dev);
|
|
u32 io_width;
|
|
int ret;
|
|
|
|
pdata->iobase = dev_read_addr(dev);
|
|
priv->iobase = pdata->iobase;
|
|
|
|
ret = dev_read_u32(dev, "reg-io-width", &io_width);
|
|
if (!ret)
|
|
priv->use_32_bit_io = (io_width == 4);
|
|
else
|
|
priv->use_32_bit_io = CONFIG_IS_ENABLED(SMC911X_32_BIT);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const struct eth_ops smc911x_ops = {
|
|
.start = smc911x_start,
|
|
.send = smc911x_send,
|
|
.recv = smc911x_recv,
|
|
.stop = smc911x_stop,
|
|
.read_rom_hwaddr = smc911x_read_rom_hwaddr,
|
|
};
|
|
|
|
static const struct udevice_id smc911x_ids[] = {
|
|
{ .compatible = "smsc,lan9115" },
|
|
{ }
|
|
};
|
|
|
|
U_BOOT_DRIVER(smc911x) = {
|
|
.name = "eth_smc911x",
|
|
.id = UCLASS_ETH,
|
|
.of_match = smc911x_ids,
|
|
.bind = smc911x_bind,
|
|
.of_to_plat = smc911x_of_to_plat,
|
|
.probe = smc911x_probe,
|
|
.ops = &smc911x_ops,
|
|
.priv_auto = sizeof(struct smc911x_priv),
|
|
.plat_auto = sizeof(struct eth_pdata),
|
|
.flags = DM_FLAG_ALLOC_PRIV_DMA,
|
|
};
|
|
#endif
|