X-Git-Url: https://git.kernelconcepts.de/?p=karo-tx-uboot.git;a=blobdiff_plain;f=drivers%2Fnet%2Fzynq_gem.c;h=3cadd23bb46aa77529b9a15909f20409588eb4e9;hp=eac9b6f4584466e56d1b9646fb7ff9bae88e53ed;hb=d2a3e911390f9fc4d8c0ee4b3c7fc75f4fd3fd19;hpb=e825b100d209a9d3c79b2998452cafa94eec986a diff --git a/drivers/net/zynq_gem.c b/drivers/net/zynq_gem.c index eac9b6f458..3cadd23bb4 100644 --- a/drivers/net/zynq_gem.c +++ b/drivers/net/zynq_gem.c @@ -6,28 +6,15 @@ * Based on Xilinx gmac driver: * (C) Copyright 2011 Xilinx * - * See file CREDITS for list of people who contributed to this - * project. - * - * 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., 59 Temple Place, Suite 330, Boston, - * MA 02111-1307 USA + * SPDX-License-Identifier: GPL-2.0+ */ #include #include +#include #include +#include +#include #include #include #include @@ -59,11 +46,6 @@ #define ZYNQ_GEM_TXBUF_WRAP_MASK 0x40000000 #define ZYNQ_GEM_TXBUF_LAST_MASK 0x00008000 /* Last buffer */ -#define ZYNQ_GEM_TXSR_HRESPNOK_MASK 0x00000100 /* Transmit hresp not OK */ -#define ZYNQ_GEM_TXSR_URUN_MASK 0x00000040 /* Transmit underrun */ -/* Transmit buffs exhausted mid frame */ -#define ZYNQ_GEM_TXSR_BUFEXH_MASK 0x00000010 - #define ZYNQ_GEM_NWCTRL_TXEN_MASK 0x00000008 /* Enable transmit */ #define ZYNQ_GEM_NWCTRL_RXEN_MASK 0x00000004 /* Enable receive */ #define ZYNQ_GEM_NWCTRL_MDEN_MASK 0x00000010 /* Enable MDIO port */ @@ -106,6 +88,16 @@ */ #define PHY_DETECT_MASK 0x1808 +/* TX BD status masks */ +#define ZYNQ_GEM_TXBUF_FRMLEN_MASK 0x000007ff +#define ZYNQ_GEM_TXBUF_EXHAUSTED 0x08000000 +#define ZYNQ_GEM_TXBUF_UNDERRUN 0x10000000 + +/* Clock frequencies for different speeds */ +#define ZYNQ_GEM_FREQUENCY_10 2500000UL +#define ZYNQ_GEM_FREQUENCY_100 25000000UL +#define ZYNQ_GEM_FREQUENCY_1000 125000000UL + /* Device registers */ struct zynq_gem_regs { u32 nwctrl; /* Network Control reg */ @@ -139,12 +131,18 @@ struct emac_bd { }; #define RX_BUF 3 +/* Page table entries are set to 1MB, or multiples of 1MB + * (not < 1MB). driver uses less bd's so use 1MB bdspace. + */ +#define BD_SPACE 0x100000 +/* BD separation space */ +#define BD_SEPRN_SPACE 64 /* Initialized, rxbd_current, rx_first_buf must be 0 after init */ struct zynq_gem_priv { - struct emac_bd tx_bd; - struct emac_bd rx_bd[RX_BUF]; - char rxbuffers[RX_BUF * PKTSIZE_ALIGN]; + struct emac_bd *tx_bd; + struct emac_bd *rx_bd; + char *rxbuffers; u32 rxbd_current; u32 rx_first_buf; int phyaddr; @@ -280,7 +278,8 @@ static int zynq_gem_setup_mac(struct eth_device *dev) static int zynq_gem_init(struct eth_device *dev, bd_t * bis) { - u32 i, rclk, clk = 0; + u32 i; + unsigned long clk_rate = 0; struct phy_device *phydev; const u32 stat_size = (sizeof(struct zynq_gem_regs) - offsetof(struct zynq_gem_regs, stat)) / 4; @@ -315,20 +314,18 @@ static int zynq_gem_init(struct eth_device *dev, bd_t * bis) readl(®s->stat[i]); /* Setup RxBD space */ - memset(&(priv->rx_bd), 0, sizeof(priv->rx_bd)); - /* Create the RxBD ring */ - memset(&(priv->rxbuffers), 0, sizeof(priv->rxbuffers)); + memset(priv->rx_bd, 0, RX_BUF * sizeof(struct emac_bd)); for (i = 0; i < RX_BUF; i++) { priv->rx_bd[i].status = 0xF0000000; priv->rx_bd[i].addr = - (u32)((char *)&(priv->rxbuffers) + + ((u32)(priv->rxbuffers) + (i * PKTSIZE_ALIGN)); } /* WRAP bit to last BD */ priv->rx_bd[--i].addr |= ZYNQ_GEM_RXBUF_WRAP_MASK; /* Write RxBDs to IP */ - writel((u32)&(priv->rx_bd), ®s->rxqbase); + writel((u32)priv->rx_bd, ®s->rxqbase); /* Setup for DMA Configuration register */ writel(ZYNQ_GEM_DMACR_INIT, ®s->dmacr); @@ -342,7 +339,8 @@ static int zynq_gem_init(struct eth_device *dev, bd_t * bis) phy_detection(dev); /* interface - look at tsec */ - phydev = phy_connect(priv->bus, priv->phyaddr, dev, 0); + phydev = phy_connect(priv->bus, priv->phyaddr, dev, + PHY_INTERFACE_MODE_MII); phydev->supported = supported | ADVERTISED_Pause | ADVERTISED_Asym_Pause; @@ -351,30 +349,31 @@ static int zynq_gem_init(struct eth_device *dev, bd_t * bis) phy_config(phydev); phy_startup(phydev); + if (!phydev->link) { + printf("%s: No link.\n", phydev->dev->name); + return -1; + } + switch (phydev->speed) { case SPEED_1000: writel(ZYNQ_GEM_NWCFG_INIT | ZYNQ_GEM_NWCFG_SPEED1000, ®s->nwcfg); - rclk = (0 << 4) | (1 << 0); - clk = (1 << 20) | (8 << 8) | (0 << 4) | (1 << 0); + clk_rate = ZYNQ_GEM_FREQUENCY_1000; break; case SPEED_100: clrsetbits_le32(®s->nwcfg, ZYNQ_GEM_NWCFG_SPEED1000, ZYNQ_GEM_NWCFG_INIT | ZYNQ_GEM_NWCFG_SPEED100); - rclk = 1 << 0; - clk = (5 << 20) | (8 << 8) | (0 << 4) | (1 << 0); + clk_rate = ZYNQ_GEM_FREQUENCY_100; break; case SPEED_10: - rclk = 1 << 0; - /* FIXME untested */ - clk = (5 << 20) | (8 << 8) | (0 << 4) | (1 << 0); + clk_rate = ZYNQ_GEM_FREQUENCY_10; break; } /* Change the rclk and clk only not using EMIO interface */ if (!priv->emio) zynq_slcr_gem_clk_setup(dev->iobase != - ZYNQ_GEM_BASEADDR0, rclk, clk); + ZYNQ_GEM_BASEADDR0, clk_rate); setbits_le32(®s->nwctrl, ZYNQ_GEM_NWCTRL_RXEN_MASK | ZYNQ_GEM_NWCTRL_TXEN_MASK); @@ -384,32 +383,35 @@ static int zynq_gem_init(struct eth_device *dev, bd_t * bis) static int zynq_gem_send(struct eth_device *dev, void *ptr, int len) { - u32 status; + u32 addr, size; struct zynq_gem_priv *priv = dev->priv; struct zynq_gem_regs *regs = (struct zynq_gem_regs *)dev->iobase; - const u32 mask = ZYNQ_GEM_TXSR_HRESPNOK_MASK | \ - ZYNQ_GEM_TXSR_URUN_MASK | ZYNQ_GEM_TXSR_BUFEXH_MASK; /* setup BD */ - writel((u32)&(priv->tx_bd), ®s->txqbase); + writel((u32)priv->tx_bd, ®s->txqbase); /* Setup Tx BD */ - memset((void *)&(priv->tx_bd), 0, sizeof(struct emac_bd)); + memset(priv->tx_bd, 0, sizeof(struct emac_bd)); + + priv->tx_bd->addr = (u32)ptr; + priv->tx_bd->status = (len & ZYNQ_GEM_TXBUF_FRMLEN_MASK) | + ZYNQ_GEM_TXBUF_LAST_MASK; - priv->tx_bd.addr = (u32)ptr; - priv->tx_bd.status = len | ZYNQ_GEM_TXBUF_LAST_MASK; + addr = (u32) ptr; + addr &= ~(ARCH_DMA_MINALIGN - 1); + size = roundup(len, ARCH_DMA_MINALIGN); + flush_dcache_range(addr, addr + size); + barrier(); /* Start transmit */ setbits_le32(®s->nwctrl, ZYNQ_GEM_NWCTRL_STARTTX_MASK); - /* Read the stat register to know if the packet has been transmitted */ - status = readl(®s->txsr); - if (status & mask) - printf("Something has gone wrong here!? Status is 0x%x.\n", - status); + /* Read TX BD status */ + if (priv->tx_bd->status & ZYNQ_GEM_TXBUF_UNDERRUN) + printf("TX underrun\n"); + if (priv->tx_bd->status & ZYNQ_GEM_TXBUF_EXHAUSTED) + printf("TX buffers exhausted in mid frame\n"); - /* Clear Tx status register before leaving . */ - writel(status, ®s->txsr); return 0; } @@ -432,8 +434,12 @@ static int zynq_gem_recv(struct eth_device *dev) frame_len = current_bd->status & ZYNQ_GEM_RXBUF_LEN_MASK; if (frame_len) { - NetReceive((u8 *) (current_bd->addr & - ZYNQ_GEM_RXBUF_ADD_MASK), frame_len); + u32 addr = current_bd->addr & ZYNQ_GEM_RXBUF_ADD_MASK; + addr &= ~(ARCH_DMA_MINALIGN - 1); + u32 size = roundup(frame_len, ARCH_DMA_MINALIGN); + invalidate_dcache_range(addr, addr + size); + + NetReceive((u8 *)addr, frame_len); if (current_bd->status & ZYNQ_GEM_RXBUF_SOF_MASK) priv->rx_first_buf = priv->rxbd_current; @@ -487,6 +493,7 @@ int zynq_gem_initialize(bd_t *bis, int base_addr, int phy_addr, u32 emio) { struct eth_device *dev; struct zynq_gem_priv *priv; + void *bd_space; dev = calloc(1, sizeof(*dev)); if (dev == NULL) @@ -499,6 +506,18 @@ int zynq_gem_initialize(bd_t *bis, int base_addr, int phy_addr, u32 emio) } priv = dev->priv; + /* Align rxbuffers to ARCH_DMA_MINALIGN */ + priv->rxbuffers = memalign(ARCH_DMA_MINALIGN, RX_BUF * PKTSIZE_ALIGN); + memset(priv->rxbuffers, 0, RX_BUF * PKTSIZE_ALIGN); + + /* Align bd_space to 1MB */ + bd_space = memalign(1 << MMU_SECTION_SHIFT, BD_SPACE); + mmu_set_region_dcache_behaviour((u32)bd_space, BD_SPACE, DCACHE_OFF); + + /* Initialize the bd spaces for tx and rx bd's */ + priv->tx_bd = (struct emac_bd *)bd_space; + priv->rx_bd = (struct emac_bd *)((u32)bd_space + BD_SEPRN_SPACE); + priv->phyaddr = phy_addr; priv->emio = emio; @@ -519,3 +538,43 @@ int zynq_gem_initialize(bd_t *bis, int base_addr, int phy_addr, u32 emio) return 1; } + +#ifdef CONFIG_OF_CONTROL +int zynq_gem_of_init(const void *blob) +{ + int offset = 0; + u32 ret = 0; + u32 reg, phy_reg; + + debug("ZYNQ GEM: Initialization\n"); + + do { + offset = fdt_node_offset_by_compatible(blob, offset, + "xlnx,ps7-ethernet-1.00.a"); + if (offset != -1) { + reg = fdtdec_get_addr(blob, offset, "reg"); + if (reg != FDT_ADDR_T_NONE) { + offset = fdtdec_lookup_phandle(blob, offset, + "phy-handle"); + if (offset != -1) + phy_reg = fdtdec_get_addr(blob, offset, + "reg"); + else + phy_reg = 0; + + debug("ZYNQ GEM: addr %x, phyaddr %x\n", + reg, phy_reg); + + ret |= zynq_gem_initialize(NULL, reg, + phy_reg, 0); + + } else { + debug("ZYNQ GEM: Can't get base address\n"); + return -1; + } + } + } while (offset != -1); + + return ret; +} +#endif