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![Stefan Roese](/assets/img/avatar_default.png)
There have been 3 versions of the sunxi_emac support patch during its development. Somehow version 2 ended up in upstream u-boot where as the u-boot-sunxi git repo got version 3. This bumps the version in upstream u-boot to version 3 of the patch: - Initialize MII clock earlier so mii access to allow independent use - Name change from WEMAC to EMAC to match mainline kernel & chip manual - Cosmetic code cleanup Signed-off-by: Stefan Roese <sr@denx.de> Signed-off-by: Henrik Nordstrom <henrik@henriknordstrom.net> Signed-off-by: Oliver Schinagl <oliver@schinagl.nl> Signed-off-by: Hans de Goede <hdegoede@redhat.com> Acked-by: Ian Campbell <ijc@hellion.org.uk>
522 lines
12 KiB
C
522 lines
12 KiB
C
/*
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* sunxi_emac.c -- Allwinner A10 ethernet driver
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*
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* (C) Copyright 2012, Stefan Roese <sr@denx.de>
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*
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* SPDX-License-Identifier: GPL-2.0+
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*/
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#include <common.h>
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#include <linux/err.h>
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#include <malloc.h>
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#include <miiphy.h>
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#include <net.h>
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#include <asm/io.h>
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#include <asm/arch/clock.h>
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#include <asm/arch/gpio.h>
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/* EMAC register */
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struct emac_regs {
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u32 ctl; /* 0x00 */
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u32 tx_mode; /* 0x04 */
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u32 tx_flow; /* 0x08 */
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u32 tx_ctl0; /* 0x0c */
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u32 tx_ctl1; /* 0x10 */
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u32 tx_ins; /* 0x14 */
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u32 tx_pl0; /* 0x18 */
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u32 tx_pl1; /* 0x1c */
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u32 tx_sta; /* 0x20 */
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u32 tx_io_data; /* 0x24 */
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u32 tx_io_data1;/* 0x28 */
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u32 tx_tsvl0; /* 0x2c */
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u32 tx_tsvh0; /* 0x30 */
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u32 tx_tsvl1; /* 0x34 */
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u32 tx_tsvh1; /* 0x38 */
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u32 rx_ctl; /* 0x3c */
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u32 rx_hash0; /* 0x40 */
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u32 rx_hash1; /* 0x44 */
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u32 rx_sta; /* 0x48 */
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u32 rx_io_data; /* 0x4c */
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u32 rx_fbc; /* 0x50 */
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u32 int_ctl; /* 0x54 */
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u32 int_sta; /* 0x58 */
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u32 mac_ctl0; /* 0x5c */
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u32 mac_ctl1; /* 0x60 */
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u32 mac_ipgt; /* 0x64 */
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u32 mac_ipgr; /* 0x68 */
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u32 mac_clrt; /* 0x6c */
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u32 mac_maxf; /* 0x70 */
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u32 mac_supp; /* 0x74 */
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u32 mac_test; /* 0x78 */
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u32 mac_mcfg; /* 0x7c */
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u32 mac_mcmd; /* 0x80 */
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u32 mac_madr; /* 0x84 */
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u32 mac_mwtd; /* 0x88 */
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u32 mac_mrdd; /* 0x8c */
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u32 mac_mind; /* 0x90 */
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u32 mac_ssrr; /* 0x94 */
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u32 mac_a0; /* 0x98 */
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u32 mac_a1; /* 0x9c */
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};
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/* SRAMC register */
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struct sunxi_sramc_regs {
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u32 ctrl0;
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u32 ctrl1;
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};
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/* 0: Disable 1: Aborted frame enable(default) */
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#define EMAC_TX_AB_M (0x1 << 0)
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/* 0: CPU 1: DMA(default) */
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#define EMAC_TX_TM (0x1 << 1)
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#define EMAC_TX_SETUP (0)
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/* 0: DRQ asserted 1: DRQ automatically(default) */
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#define EMAC_RX_DRQ_MODE (0x1 << 1)
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/* 0: CPU 1: DMA(default) */
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#define EMAC_RX_TM (0x1 << 2)
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/* 0: Normal(default) 1: Pass all Frames */
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#define EMAC_RX_PA (0x1 << 4)
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/* 0: Normal(default) 1: Pass Control Frames */
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#define EMAC_RX_PCF (0x1 << 5)
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/* 0: Normal(default) 1: Pass Frames with CRC Error */
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#define EMAC_RX_PCRCE (0x1 << 6)
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/* 0: Normal(default) 1: Pass Frames with Length Error */
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#define EMAC_RX_PLE (0x1 << 7)
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/* 0: Normal 1: Pass Frames length out of range(default) */
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#define EMAC_RX_POR (0x1 << 8)
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/* 0: Not accept 1: Accept unicast Packets(default) */
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#define EMAC_RX_UCAD (0x1 << 16)
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/* 0: Normal(default) 1: DA Filtering */
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#define EMAC_RX_DAF (0x1 << 17)
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/* 0: Not accept 1: Accept multicast Packets(default) */
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#define EMAC_RX_MCO (0x1 << 20)
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/* 0: Disable(default) 1: Enable Hash filter */
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#define EMAC_RX_MHF (0x1 << 21)
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/* 0: Not accept 1: Accept Broadcast Packets(default) */
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#define EMAC_RX_BCO (0x1 << 22)
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/* 0: Disable(default) 1: Enable SA Filtering */
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#define EMAC_RX_SAF (0x1 << 24)
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/* 0: Normal(default) 1: Inverse Filtering */
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#define EMAC_RX_SAIF (0x1 << 25)
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#define EMAC_RX_SETUP (EMAC_RX_POR | EMAC_RX_UCAD | EMAC_RX_DAF | \
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EMAC_RX_MCO | EMAC_RX_BCO)
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/* 0: Disable 1: Enable Receive Flow Control(default) */
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#define EMAC_MAC_CTL0_RFC (0x1 << 2)
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/* 0: Disable 1: Enable Transmit Flow Control(default) */
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#define EMAC_MAC_CTL0_TFC (0x1 << 3)
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#define EMAC_MAC_CTL0_SETUP (EMAC_MAC_CTL0_RFC | EMAC_MAC_CTL0_TFC)
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/* 0: Disable 1: Enable MAC Frame Length Checking(default) */
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#define EMAC_MAC_CTL1_FLC (0x1 << 1)
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/* 0: Disable(default) 1: Enable Huge Frame */
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#define EMAC_MAC_CTL1_HF (0x1 << 2)
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/* 0: Disable(default) 1: Enable MAC Delayed CRC */
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#define EMAC_MAC_CTL1_DCRC (0x1 << 3)
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/* 0: Disable 1: Enable MAC CRC(default) */
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#define EMAC_MAC_CTL1_CRC (0x1 << 4)
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/* 0: Disable 1: Enable MAC PAD Short frames(default) */
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#define EMAC_MAC_CTL1_PC (0x1 << 5)
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/* 0: Disable(default) 1: Enable MAC PAD Short frames and append CRC */
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#define EMAC_MAC_CTL1_VC (0x1 << 6)
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/* 0: Disable(default) 1: Enable MAC auto detect Short frames */
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#define EMAC_MAC_CTL1_ADP (0x1 << 7)
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/* 0: Disable(default) 1: Enable */
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#define EMAC_MAC_CTL1_PRE (0x1 << 8)
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/* 0: Disable(default) 1: Enable */
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#define EMAC_MAC_CTL1_LPE (0x1 << 9)
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/* 0: Disable(default) 1: Enable no back off */
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#define EMAC_MAC_CTL1_NB (0x1 << 12)
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/* 0: Disable(default) 1: Enable */
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#define EMAC_MAC_CTL1_BNB (0x1 << 13)
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/* 0: Disable(default) 1: Enable */
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#define EMAC_MAC_CTL1_ED (0x1 << 14)
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#define EMAC_MAC_CTL1_SETUP (EMAC_MAC_CTL1_FLC | EMAC_MAC_CTL1_CRC | \
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EMAC_MAC_CTL1_PC)
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#define EMAC_MAC_IPGT 0x15
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#define EMAC_MAC_NBTB_IPG1 0xc
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#define EMAC_MAC_NBTB_IPG2 0x12
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#define EMAC_MAC_CW 0x37
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#define EMAC_MAC_RM 0xf
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#define EMAC_MAC_MFL 0x0600
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/* Receive status */
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#define EMAC_CRCERR (0x1 << 4)
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#define EMAC_LENERR (0x3 << 5)
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#define DMA_CPU_TRRESHOLD 2000
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struct emac_eth_dev {
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u32 speed;
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u32 duplex;
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u32 phy_configured;
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int link_printed;
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};
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struct emac_rxhdr {
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s16 rx_len;
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u16 rx_status;
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};
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static void emac_inblk_32bit(void *reg, void *data, int count)
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{
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int cnt = (count + 3) >> 2;
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if (cnt) {
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u32 *buf = data;
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do {
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u32 x = readl(reg);
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*buf++ = x;
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} while (--cnt);
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}
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}
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static void emac_outblk_32bit(void *reg, void *data, int count)
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{
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int cnt = (count + 3) >> 2;
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if (cnt) {
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const u32 *buf = data;
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do {
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writel(*buf++, reg);
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} while (--cnt);
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}
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}
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/* Read a word from phyxcer */
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static int emac_phy_read(const char *devname, unsigned char addr,
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unsigned char reg, unsigned short *value)
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{
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struct eth_device *dev = eth_get_dev_by_name(devname);
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struct emac_regs *regs = (struct emac_regs *)dev->iobase;
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/* issue the phy address and reg */
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writel(addr << 8 | reg, ®s->mac_madr);
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/* pull up the phy io line */
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writel(0x1, ®s->mac_mcmd);
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/* Wait read complete */
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mdelay(1);
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/* push down the phy io line */
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writel(0x0, ®s->mac_mcmd);
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/* and write data */
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*value = readl(®s->mac_mrdd);
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return 0;
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}
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/* Write a word to phyxcer */
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static int emac_phy_write(const char *devname, unsigned char addr,
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unsigned char reg, unsigned short value)
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{
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struct eth_device *dev = eth_get_dev_by_name(devname);
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struct emac_regs *regs = (struct emac_regs *)dev->iobase;
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/* issue the phy address and reg */
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writel(addr << 8 | reg, ®s->mac_madr);
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/* pull up the phy io line */
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writel(0x1, ®s->mac_mcmd);
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/* Wait write complete */
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mdelay(1);
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/* push down the phy io line */
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writel(0x0, ®s->mac_mcmd);
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/* and write data */
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writel(value, ®s->mac_mwtd);
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return 0;
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}
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static void emac_setup(struct eth_device *dev)
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{
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struct emac_regs *regs = (struct emac_regs *)dev->iobase;
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u32 reg_val;
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u16 phy_val;
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u32 duplex_flag;
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/* Set up TX */
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writel(EMAC_TX_SETUP, ®s->tx_mode);
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/* Set up RX */
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writel(EMAC_RX_SETUP, ®s->rx_ctl);
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/* Set MAC */
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/* Set MAC CTL0 */
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writel(EMAC_MAC_CTL0_SETUP, ®s->mac_ctl0);
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/* Set MAC CTL1 */
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emac_phy_read(dev->name, 1, 0, &phy_val);
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debug("PHY SETUP, reg 0 value: %x\n", phy_val);
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duplex_flag = !!(phy_val & (1 << 8));
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reg_val = 0;
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if (duplex_flag)
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reg_val = (0x1 << 0);
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writel(EMAC_MAC_CTL1_SETUP | reg_val, ®s->mac_ctl1);
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/* Set up IPGT */
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writel(EMAC_MAC_IPGT, ®s->mac_ipgt);
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/* Set up IPGR */
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writel(EMAC_MAC_NBTB_IPG2 | (EMAC_MAC_NBTB_IPG1 << 8), ®s->mac_ipgr);
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/* Set up Collison window */
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writel(EMAC_MAC_RM | (EMAC_MAC_CW << 8), ®s->mac_clrt);
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/* Set up Max Frame Length */
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writel(EMAC_MAC_MFL, ®s->mac_maxf);
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}
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static void emac_reset(struct eth_device *dev)
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{
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struct emac_regs *regs = (struct emac_regs *)dev->iobase;
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debug("resetting device\n");
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/* RESET device */
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writel(0, ®s->ctl);
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udelay(200);
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writel(1, ®s->ctl);
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udelay(200);
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}
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static int sunxi_emac_eth_init(struct eth_device *dev, bd_t *bd)
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{
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struct emac_regs *regs = (struct emac_regs *)dev->iobase;
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struct emac_eth_dev *priv = dev->priv;
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u16 phy_reg;
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/* Init EMAC */
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/* Flush RX FIFO */
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setbits_le32(®s->rx_ctl, 0x8);
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udelay(1);
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/* Init MAC */
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/* Soft reset MAC */
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clrbits_le32(®s->mac_ctl0, 0x1 << 15);
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/* Clear RX counter */
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writel(0x0, ®s->rx_fbc);
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udelay(1);
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/* Set up EMAC */
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emac_setup(dev);
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writel(dev->enetaddr[0] << 16 | dev->enetaddr[1] << 8 |
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dev->enetaddr[2], ®s->mac_a1);
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writel(dev->enetaddr[3] << 16 | dev->enetaddr[4] << 8 |
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dev->enetaddr[5], ®s->mac_a0);
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mdelay(1);
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emac_reset(dev);
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/* PHY POWER UP */
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emac_phy_read(dev->name, 1, 0, &phy_reg);
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emac_phy_write(dev->name, 1, 0, phy_reg & (~(0x1 << 11)));
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mdelay(1);
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emac_phy_read(dev->name, 1, 0, &phy_reg);
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priv->speed = miiphy_speed(dev->name, 0);
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priv->duplex = miiphy_duplex(dev->name, 0);
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/* Print link status only once */
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if (!priv->link_printed) {
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printf("ENET Speed is %d Mbps - %s duplex connection\n",
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priv->speed, (priv->duplex == HALF) ? "HALF" : "FULL");
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priv->link_printed = 1;
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}
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/* Set EMAC SPEED depend on PHY */
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clrsetbits_le32(®s->mac_supp, 1 << 8,
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((phy_reg & (0x1 << 13)) >> 13) << 8);
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/* Set duplex depend on phy */
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clrsetbits_le32(®s->mac_ctl1, 1 << 0,
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((phy_reg & (0x1 << 8)) >> 8) << 0);
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/* Enable RX/TX */
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setbits_le32(®s->ctl, 0x7);
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return 0;
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}
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static void sunxi_emac_eth_halt(struct eth_device *dev)
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{
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/* Nothing to do here */
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}
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static int sunxi_emac_eth_recv(struct eth_device *dev)
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{
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struct emac_regs *regs = (struct emac_regs *)dev->iobase;
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struct emac_rxhdr rxhdr;
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u32 rxcount;
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u32 reg_val;
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int rx_len;
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int rx_status;
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int good_packet;
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/* Check packet ready or not */
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/* Race warning: The first packet might arrive with
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* the interrupts disabled, but the second will fix
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*/
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rxcount = readl(®s->rx_fbc);
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if (!rxcount) {
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/* Had one stuck? */
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rxcount = readl(®s->rx_fbc);
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if (!rxcount)
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return 0;
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}
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reg_val = readl(®s->rx_io_data);
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if (reg_val != 0x0143414d) {
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/* Disable RX */
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clrbits_le32(®s->ctl, 0x1 << 2);
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/* Flush RX FIFO */
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setbits_le32(®s->rx_ctl, 0x1 << 3);
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while (readl(®s->rx_ctl) & (0x1 << 3))
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;
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/* Enable RX */
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setbits_le32(®s->ctl, 0x1 << 2);
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return 0;
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}
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/* A packet ready now
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* Get status/length
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*/
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good_packet = 1;
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emac_inblk_32bit(®s->rx_io_data, &rxhdr, sizeof(rxhdr));
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rx_len = rxhdr.rx_len;
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rx_status = rxhdr.rx_status;
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/* Packet Status check */
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if (rx_len < 0x40) {
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good_packet = 0;
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debug("RX: Bad Packet (runt)\n");
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}
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/* rx_status is identical to RSR register. */
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if (0 & rx_status & (EMAC_CRCERR | EMAC_LENERR)) {
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good_packet = 0;
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if (rx_status & EMAC_CRCERR)
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printf("crc error\n");
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if (rx_status & EMAC_LENERR)
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printf("length error\n");
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}
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/* Move data from EMAC */
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if (good_packet) {
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if (rx_len > DMA_CPU_TRRESHOLD) {
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printf("Received packet is too big (len=%d)\n", rx_len);
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} else {
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emac_inblk_32bit((void *)®s->rx_io_data,
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NetRxPackets[0], rx_len);
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/* Pass to upper layer */
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NetReceive(NetRxPackets[0], rx_len);
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return rx_len;
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}
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}
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return 0;
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}
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static int sunxi_emac_eth_send(struct eth_device *dev, void *packet, int len)
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{
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struct emac_regs *regs = (struct emac_regs *)dev->iobase;
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/* Select channel 0 */
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writel(0, ®s->tx_ins);
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/* Write packet */
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emac_outblk_32bit((void *)®s->tx_io_data, packet, len);
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/* Set TX len */
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writel(len, ®s->tx_pl0);
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/* Start translate from fifo to phy */
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setbits_le32(®s->tx_ctl0, 1);
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return 0;
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}
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int sunxi_emac_initialize(void)
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{
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struct sunxi_ccm_reg *const ccm =
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(struct sunxi_ccm_reg *)SUNXI_CCM_BASE;
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struct sunxi_sramc_regs *sram =
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(struct sunxi_sramc_regs *)SUNXI_SRAMC_BASE;
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struct emac_regs *regs =
|
|
(struct emac_regs *)SUNXI_EMAC_BASE;
|
|
struct eth_device *dev;
|
|
struct emac_eth_dev *priv;
|
|
int pin;
|
|
|
|
dev = malloc(sizeof(*dev));
|
|
if (dev == NULL)
|
|
return -ENOMEM;
|
|
|
|
priv = (struct emac_eth_dev *)malloc(sizeof(struct emac_eth_dev));
|
|
if (!priv) {
|
|
free(dev);
|
|
return -ENOMEM;
|
|
}
|
|
|
|
memset(dev, 0, sizeof(*dev));
|
|
memset(priv, 0, sizeof(struct emac_eth_dev));
|
|
|
|
/* Map SRAM to EMAC */
|
|
setbits_le32(&sram->ctrl1, 0x5 << 2);
|
|
|
|
/* Configure pin mux settings for MII Ethernet */
|
|
for (pin = SUNXI_GPA(0); pin <= SUNXI_GPA(17); pin++)
|
|
sunxi_gpio_set_cfgpin(pin, SUNXI_GPA0_EMAC);
|
|
|
|
/* Set up clock gating */
|
|
setbits_le32(&ccm->ahb_gate0, 0x1 << AHB_GATE_OFFSET_EMAC);
|
|
|
|
/* Set MII clock */
|
|
clrsetbits_le32(®s->mac_mcfg, 0xf << 2, 0xd << 2);
|
|
|
|
dev->iobase = (int)regs;
|
|
dev->priv = priv;
|
|
dev->init = sunxi_emac_eth_init;
|
|
dev->halt = sunxi_emac_eth_halt;
|
|
dev->send = sunxi_emac_eth_send;
|
|
dev->recv = sunxi_emac_eth_recv;
|
|
strcpy(dev->name, "emac");
|
|
|
|
eth_register(dev);
|
|
|
|
miiphy_register(dev->name, emac_phy_read, emac_phy_write);
|
|
|
|
return 0;
|
|
}
|