diff options
Diffstat (limited to 'drivers/net/sh_eth.c')
| -rw-r--r-- | drivers/net/sh_eth.c | 603 |
1 files changed, 603 insertions, 0 deletions
diff --git a/drivers/net/sh_eth.c b/drivers/net/sh_eth.c new file mode 100644 index 0000000000..9e3cf98b3b --- /dev/null +++ b/drivers/net/sh_eth.c @@ -0,0 +1,603 @@ +/* + * sh_eth.c - Driver for Renesas SH7763's ethernet controler. + * + * Copyright (C) 2008 Renesas Solutions Corp. + * Copyright (c) 2008 Nobuhiro Iwamatsu + * Copyright (c) 2007 Carlos Munoz <carlos@kenati.com> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. + */ + +#include <config.h> +#include <common.h> +#include <malloc.h> +#include <net.h> +#include <asm/errno.h> +#include <asm/io.h> + +#include "sh_eth.h" + +#ifndef CONFIG_SH_ETHER_USE_PORT +# error "Please define CONFIG_SH_ETHER_USE_PORT" +#endif +#ifndef CONFIG_SH_ETHER_PHY_ADDR +# error "Please define CONFIG_SH_ETHER_PHY_ADDR" +#endif + +extern int eth_init(bd_t *bd); +extern void eth_halt(void); +extern int eth_rx(void); +extern int eth_send(volatile void *packet, int length); + +static struct dev_info_s *dev; + +/* + * Bits are written to the PHY serially using the + * PIR register, just like a bit banger. + */ +static void sh_eth_mii_write_phy_bits(int port, u32 val, int len) +{ + int i; + u32 pir; + + /* Bit positions is 1 less than the number of bits */ + for (i = len - 1; i >= 0; i--) { + /* Write direction, bit to write, clock is low */ + pir = 2 | ((val & 1 << i) ? 1 << 2 : 0); + outl(pir, PIR(port)); + udelay(1); + /* Write direction, bit to write, clock is high */ + pir = 3 | ((val & 1 << i) ? 1 << 2 : 0); + outl(pir, PIR(port)); + udelay(1); + /* Write direction, bit to write, clock is low */ + pir = 2 | ((val & 1 << i) ? 1 << 2 : 0); + outl(pir, PIR(port)); + udelay(1); + } +} + +static void sh_eth_mii_bus_release(int port) +{ + /* Read direction, clock is low */ + outl(0, PIR(port)); + udelay(1); + /* Read direction, clock is high */ + outl(1, PIR(port)); + udelay(1); + /* Read direction, clock is low */ + outl(0, PIR(port)); + udelay(1); +} + +static void sh_eth_mii_ind_bus_release(int port) +{ + /* Read direction, clock is low */ + outl(0, PIR(port)); + udelay(1); +} + +static int sh_eth_mii_read_phy_bits(int port, u32 * val, int len) +{ + int i; + u32 pir; + + *val = 0; + for (i = len - 1; i >= 0; i--) { + /* Read direction, clock is high */ + outl(1, PIR(port)); + udelay(1); + /* Read bit */ + pir = inl(PIR(port)); + *val |= (pir & 8) ? 1 << i : 0; + /* Read direction, clock is low */ + outl(0, PIR(port)); + udelay(1); + } + + return 0; +} + +#define PHY_INIT 0xFFFFFFFF +#define PHY_READ 0x02 +#define PHY_WRITE 0x01 +/* + * To read a phy register, mii managements frames are sent to the phy. + * The frames look like this: + * pre (32 bits): 0xffff ffff + * st (2 bits): 01 + * op (2bits): 10: read 01: write + * phyad (5 bits): xxxxx + * regad (5 bits): xxxxx + * ta (Bus release): + * data (16 bits): read data + */ +static u32 sh_eth_mii_read_phy_reg(int port, u8 phy_addr, int reg) +{ + u32 val; + + /* Sent mii management frame */ + /* pre */ + sh_eth_mii_write_phy_bits(port, PHY_INIT, 32); + /* st (start of frame) */ + sh_eth_mii_write_phy_bits(port, 0x1, 2); + /* op (code) */ + sh_eth_mii_write_phy_bits(port, PHY_READ, 2); + /* phy address */ + sh_eth_mii_write_phy_bits(port, phy_addr, 5); + /* Register to read */ + sh_eth_mii_write_phy_bits(port, reg, 5); + + /* Bus release */ + sh_eth_mii_bus_release(port); + + /* Read register */ + sh_eth_mii_read_phy_bits(port, &val, 16); + + return val; +} + +/* + * To write a phy register, mii managements frames are sent to the phy. + * The frames look like this: + * pre (32 bits): 0xffff ffff + * st (2 bits): 01 + * op (2bits): 10: read 01: write + * phyad (5 bits): xxxxx + * regad (5 bits): xxxxx + * ta (2 bits): 10 + * data (16 bits): write data + * idle (Independent bus release) + */ +static void sh_eth_mii_write_phy_reg(int port, u8 phy_addr, int reg, u16 val) +{ + /* Sent mii management frame */ + /* pre */ + sh_eth_mii_write_phy_bits(port, PHY_INIT, 32); + /* st (start of frame) */ + sh_eth_mii_write_phy_bits(port, 0x1, 2); + /* op (code) */ + sh_eth_mii_write_phy_bits(port, PHY_WRITE, 2); + /* phy address */ + sh_eth_mii_write_phy_bits(port, phy_addr, 5); + /* Register to read */ + sh_eth_mii_write_phy_bits(port, reg, 5); + /* ta */ + sh_eth_mii_write_phy_bits(port, PHY_READ, 2); + /* Write register data */ + sh_eth_mii_write_phy_bits(port, val, 16); + + /* Independent bus release */ + sh_eth_mii_ind_bus_release(port); +} + +void eth_halt(void) +{ +} + +int eth_send(volatile void *packet, int len) +{ + int port = dev->port; + struct port_info_s *port_info = &dev->port_info[port]; + int timeout; + int rc = 0; + + if (!packet || len > 0xffff) { + printf("eth_send: Invalid argument\n"); + return -EINVAL; + } + + /* packet must be a 4 byte boundary */ + if ((int)packet & (4 - 1)) { + printf("eth_send: packet not 4 byte alligned\n"); + return -EFAULT; + } + + /* Update tx descriptor */ + port_info->tx_desc_cur->td2 = ADDR_TO_PHY(packet); + port_info->tx_desc_cur->td1 = len << 16; + /* Must preserve the end of descriptor list indication */ + if (port_info->tx_desc_cur->td0 & TD_TDLE) + port_info->tx_desc_cur->td0 = TD_TACT | TD_TFP | TD_TDLE; + else + port_info->tx_desc_cur->td0 = TD_TACT | TD_TFP; + + /* Restart the transmitter if disabled */ + if (!(inl(EDTRR(port)) & EDTRR_TRNS)) + outl(EDTRR_TRNS, EDTRR(port)); + + /* Wait until packet is transmitted */ + timeout = 1000; + while (port_info->tx_desc_cur->td0 & TD_TACT && timeout--) + udelay(100); + + if (timeout < 0) { + printf("eth_send: transmit timeout\n"); + rc = -1; + goto err; + } + +err: + port_info->tx_desc_cur++; + if (port_info->tx_desc_cur >= port_info->tx_desc_base + NUM_TX_DESC) + port_info->tx_desc_cur = port_info->tx_desc_base; + + return rc; +} + +int eth_rx(void) +{ + int port = dev->port; + struct port_info_s *port_info = &dev->port_info[port]; + int len = 0; + volatile u8 *packet; + + /* Check if the rx descriptor is ready */ + if (!(port_info->rx_desc_cur->rd0 & RD_RACT)) { + /* Check for errors */ + if (!(port_info->rx_desc_cur->rd0 & RD_RFE)) { + len = port_info->rx_desc_cur->rd1 & 0xffff; + packet = (volatile u8 *) + ADDR_TO_P2(port_info->rx_desc_cur->rd2); + NetReceive(packet, len); + } + + /* Make current descriptor available again */ + if (port_info->rx_desc_cur->rd0 & RD_RDLE) + port_info->rx_desc_cur->rd0 = RD_RACT | RD_RDLE; + else + port_info->rx_desc_cur->rd0 = RD_RACT; + + /* Point to the next descriptor */ + port_info->rx_desc_cur++; + if (port_info->rx_desc_cur >= + port_info->rx_desc_base + NUM_RX_DESC) + port_info->rx_desc_cur = port_info->rx_desc_base; + } + + /* Restart the receiver if disabled */ + if (!(inl(EDRRR(port)) & EDRRR_R)) + outl(EDRRR_R, EDRRR(port)); + + return len; +} + +#define EDMR_INIT_CNT 1000 +static int sh_eth_reset(struct dev_info_s *dev) +{ + int port = dev->port; + int i; + + /* Start e-dmac transmitter and receiver */ + outl(EDSR_ENALL, EDSR(port)); + + /* Perform a software reset and wait for it to complete */ + outl(EDMR_SRST, EDMR(port)); + for (i = 0; i < EDMR_INIT_CNT; i++) { + if (!(inl(EDMR(port)) & EDMR_SRST)) + break; + udelay(1000); + } + + if (i == EDMR_INIT_CNT) { + printf("Error: Software reset timeout\n"); + return -1; + } + return 0; +} + +static int sh_eth_tx_desc_init(struct dev_info_s *dev) +{ + int port = dev->port; + struct port_info_s *port_info = &dev->port_info[port]; + u32 tmp_addr; + struct tx_desc_s *cur_tx_desc; + int i; + + /* Allocate tx descriptors. They must be TX_DESC_SIZE bytes + aligned */ + if (!(port_info->tx_desc_malloc = malloc(NUM_TX_DESC * + sizeof(struct tx_desc_s) + + TX_DESC_SIZE - 1))) { + printf("Error: malloc failed\n"); + return -ENOMEM; + } + tmp_addr = (u32) (((int)port_info->tx_desc_malloc + TX_DESC_SIZE - 1) & + ~(TX_DESC_SIZE - 1)); + /* Make sure we use a P2 address (non-cacheable) */ + port_info->tx_desc_base = (struct tx_desc_s *)ADDR_TO_P2(tmp_addr); + + port_info->tx_desc_cur = port_info->tx_desc_base; + + /* Initialize all descriptors */ + for (cur_tx_desc = port_info->tx_desc_base, i = 0; i < NUM_TX_DESC; + cur_tx_desc++, i++) { + cur_tx_desc->td0 = 0x00; + cur_tx_desc->td1 = 0x00; + cur_tx_desc->td2 = 0x00; + } + + /* Mark the end of the descriptors */ + cur_tx_desc--; + cur_tx_desc->td0 |= TD_TDLE; + + /* Point the controller to the tx descriptor list. Must use physical + addresses */ + outl(ADDR_TO_PHY(port_info->tx_desc_base), TDLAR(port)); + outl(ADDR_TO_PHY(port_info->tx_desc_base), TDFAR(port)); + outl(ADDR_TO_PHY(cur_tx_desc), TDFXR(port)); + outl(0x01, TDFFR(port));/* Last discriptor bit */ + + return 0; +} + +static int sh_eth_rx_desc_init(struct dev_info_s *dev) +{ + int port = dev->port; + struct port_info_s *port_info = &dev->port_info[port]; + u32 tmp_addr; + struct rx_desc_s *cur_rx_desc; + u8 *rx_buf; + int i; + + /* Allocate rx descriptors. They must be RX_DESC_SIZE bytes + aligned */ + if (!(port_info->rx_desc_malloc = malloc(NUM_RX_DESC * + sizeof(struct rx_desc_s) + + RX_DESC_SIZE - 1))) { + printf("Error: malloc failed\n"); + return -ENOMEM; + } + tmp_addr = (u32) (((int)port_info->rx_desc_malloc + RX_DESC_SIZE - 1) & + ~(RX_DESC_SIZE - 1)); + /* Make sure we use a P2 address (non-cacheable) */ + port_info->rx_desc_base = (struct rx_desc_s *)ADDR_TO_P2(tmp_addr); + + port_info->rx_desc_cur = port_info->rx_desc_base; + + /* Allocate rx data buffers. They must be 32 bytes aligned and in + P2 area */ + if (!(port_info->rx_buf_malloc = malloc(NUM_RX_DESC * MAX_BUF_SIZE + + 31))) { + printf("Error: malloc failed\n"); + free(port_info->rx_desc_malloc); + port_info->rx_desc_malloc = NULL; + return -ENOMEM; + } + tmp_addr = (u32)(((int)port_info->rx_buf_malloc + (32 - 1)) & + ~(32 - 1)); + port_info->rx_buf_base = (u8 *)ADDR_TO_P2(tmp_addr); + + /* Initialize all descriptors */ + for (cur_rx_desc = port_info->rx_desc_base, + rx_buf = port_info->rx_buf_base, i = 0; + i < NUM_RX_DESC; cur_rx_desc++, rx_buf += MAX_BUF_SIZE, i++) { + cur_rx_desc->rd0 = RD_RACT; + cur_rx_desc->rd1 = MAX_BUF_SIZE << 16; + cur_rx_desc->rd2 = (u32) ADDR_TO_PHY(rx_buf); + } + + /* Mark the end of the descriptors */ + cur_rx_desc--; + cur_rx_desc->rd0 |= RD_RDLE; + + /* Point the controller to the rx descriptor list */ + outl(ADDR_TO_PHY(port_info->rx_desc_base), RDLAR(port)); + outl(ADDR_TO_PHY(port_info->rx_desc_base), RDFAR(port)); + outl(ADDR_TO_PHY(cur_rx_desc), RDFXR(port)); + outl(RDFFR_RDLF, RDFFR(port)); + + return 0; +} + +static void sh_eth_desc_free(struct dev_info_s *dev) +{ + int port = dev->port; + struct port_info_s *port_info = &dev->port_info[port]; + + if (port_info->tx_desc_malloc) { + free(port_info->tx_desc_malloc); + port_info->tx_desc_malloc = NULL; + } + + if (port_info->rx_desc_malloc) { + free(port_info->rx_desc_malloc); + port_info->rx_desc_malloc = NULL; + } + + if (port_info->rx_buf_malloc) { + free(port_info->rx_buf_malloc); + port_info->rx_buf_malloc = NULL; + } +} + +static int sh_eth_desc_init(struct dev_info_s *dev) +{ + int rc; + + if ((rc = sh_eth_tx_desc_init(dev)) || (rc = sh_eth_rx_desc_init(dev))) { + sh_eth_desc_free(dev); + return rc; + } + + return 0; +} + +static int sh_eth_phy_config(struct dev_info_s *dev) +{ + int port = dev->port; + struct port_info_s *port_info = &dev->port_info[port]; + int timeout; + u32 val; + /* Reset phy */ + sh_eth_mii_write_phy_reg(port, port_info->phy_addr, PHY_CTRL, PHY_C_RESET); + timeout = 10; + while (timeout--) { + val = sh_eth_mii_read_phy_reg(port, port_info->phy_addr, PHY_CTRL); + if (!(val & PHY_C_RESET)) + break; + udelay(50000); + } + if (timeout < 0) { + printf("%s phy reset timeout\n", __func__); + return -1; + } + + /* Advertise 100/10 baseT full/half duplex */ + sh_eth_mii_write_phy_reg(port, port_info->phy_addr, PHY_ANA, + (PHY_A_FDX|PHY_A_HDX|PHY_A_10FDX|PHY_A_10HDX|PHY_A_EXT)); + /* Autonegotiation, normal operation, full duplex, enable tx */ + sh_eth_mii_write_phy_reg(port, port_info->phy_addr, PHY_CTRL, + (PHY_C_ANEGEN|PHY_C_RANEG)); + /* Wait for autonegotiation to complete */ + timeout = 100; + while (timeout--) { + val = sh_eth_mii_read_phy_reg(port, port_info->phy_addr, 1); + if (val & PHY_S_ANEGC) + break; + udelay(50000); + } + if (timeout < 0) { + printf("sh_eth_phy_config() phy auto-negotiation failed\n"); + return -1; + } + + return 0; +} + +static int sh_eth_config(struct dev_info_s *dev, bd_t * bd) +{ + int port = dev->port; + struct port_info_s *port_info = &dev->port_info[port]; + u32 val; + u32 phy_status; + int rc; + + /* Configure e-dmac registers */ + outl((inl(EDMR(port)) & ~EMDR_DESC_R) | EDMR_EL, EDMR(port)); + outl(0, EESIPR(port)); + outl(0, TRSCER(port)); + outl(0, TFTR(port)); + outl((FIFO_SIZE_T | FIFO_SIZE_R), FDR(port)); + outl(RMCR_RST, RMCR(port)); + outl(0, RPADIR(port)); + outl((FIFO_F_D_RFF | FIFO_F_D_RFD), FCFTR(port)); + + /* Configure e-mac registers */ + outl(0, ECSIPR(port)); + + /* Set Mac address */ + val = bd->bi_enetaddr[0] << 24 | bd->bi_enetaddr[1] << 16 | + bd->bi_enetaddr[2] << 8 | bd->bi_enetaddr[3]; + outl(val, MAHR(port)); + + val = bd->bi_enetaddr[4] << 8 | bd->bi_enetaddr[5]; + outl(val, MALR(port)); + + outl(RFLR_RFL_MIN, RFLR(port)); + outl(0, PIPR(port)); + outl(APR_AP, APR(port)); + outl(MPR_MP, MPR(port)); + outl(TPAUSER_TPAUSE, TPAUSER(port)); + + /* Configure phy */ + if ((rc = sh_eth_phy_config(dev))) + return rc; + + /* Read phy status to finish configuring the e-mac */ + phy_status = sh_eth_mii_read_phy_reg(dev->port, + dev->port_info[dev->port].phy_addr, + 1); + + /* Set the transfer speed */ + if (phy_status & (PHY_S_100X_F|PHY_S_100X_H)) { + printf("100Base/"); + outl(GECMR_100B, GECMR(port)); + } else { + printf("10Base/"); + outl(GECMR_10B, GECMR(port)); + } + + /* Check if full duplex mode is supported by the phy */ + if (phy_status & (PHY_S_100X_F|PHY_S_10T_F)) { + printf("Full\n"); + outl((ECMR_CHG_DM|ECMR_RE|ECMR_TE|ECMR_DM), ECMR(port)); + } else { + printf("Half\n"); + outl((ECMR_CHG_DM|ECMR_RE|ECMR_TE), ECMR(port)); + } + return 0; +} + +static int sh_eth_start(struct dev_info_s *dev) +{ + /* + * Enable the e-dmac receiver only. The transmitter will be enabled when + * we have something to transmit + */ + outl(EDRRR_R, EDRRR(dev->port)); + + return 0; +} + +static int sh_eth_get_mac(bd_t *bd) +{ + char *s, *e; + int i; + + s = getenv("ethaddr"); + if (s != NULL) { + for (i = 0; i < 6; ++i) { + bd->bi_enetaddr[i] = s ? simple_strtoul(s, &e, 16) : 0; + if (s) + s = (*e) ? e + 1 : e; + } + } else { + puts("Please set MAC address\n"); + } + return 0; +} + +int eth_init(bd_t *bd) +{ + int rc; + /* Allocate main device information structure */ + if (!(dev = malloc(sizeof(*dev)))) { + printf("eth_init: malloc failed\n"); + return -ENOMEM; + } + + memset(dev, 0, sizeof(*dev)); + + dev->port = CONFIG_SH_ETHER_USE_PORT; + dev->port_info[dev->port].phy_addr = CONFIG_SH_ETHER_PHY_ADDR; + + sh_eth_get_mac(bd); + + if ((rc = sh_eth_reset(dev)) || (rc = sh_eth_desc_init(dev))) + goto err; + + if ((rc = sh_eth_config(dev, bd)) || (rc = sh_eth_start(dev))) + goto err_desc; + + return 0; + +err_desc: + sh_eth_desc_free(dev); +err: + free(dev); + printf("eth_init: Failed\n"); + return rc; +} |