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Re: [Qemu-devel] [PATCH v5 1/7] hw/mdio: Generalize etraxfs MDIO bitbang
|
From: |
Alistair Francis |
|
Subject: |
Re: [Qemu-devel] [PATCH v5 1/7] hw/mdio: Generalize etraxfs MDIO bitbanging emulation |
|
Date: |
Tue, 27 Feb 2018 14:30:36 -0800 |
On Fri, Sep 22, 2017 at 10:13 AM, Philippe Mathieu-Daudé
<address@hidden> wrote:
> From: Grant Likely <address@hidden>
>
> The etraxfs and Xilinx axienet Ethernet models implement quite a nice
> MDIO core that supports both bitbanging and direct register access. This
> change factors the common code out into a separate file. There are no
> functional changes here, just movement of code.
>
> The etraxfs and axienet are slightly different. The etraxfs version
> includes the bitbang state processing, but the axienet version has a
> minor enhancement for read/write of phy registers without using bitbang
> state variables. This patch generalizes the etraxfs version, with the
> axienet change backported in.
>
> Signed-off-by: Grant Likely <address@hidden>
> Signed-off-by: Philippe Mathieu-Daudé <address@hidden>
> [PMD: rebased with a minor checkpatch fix]
> ---
> include/hw/net/mdio.h | 76 +++++++++++++
> hw/net/etraxfs_eth.c | 278
> +-----------------------------------------------
> hw/net/mdio.c | 262 +++++++++++++++++++++++++++++++++++++++++++++
> hw/net/xilinx_axienet.c | 187 +-------------------------------
> hw/net/Makefile.objs | 2 +
> 5 files changed, 344 insertions(+), 461 deletions(-)
> create mode 100644 include/hw/net/mdio.h
> create mode 100644 hw/net/mdio.c
>
> diff --git a/include/hw/net/mdio.h b/include/hw/net/mdio.h
> new file mode 100644
> index 0000000000..ac36aed3c3
> --- /dev/null
> +++ b/include/hw/net/mdio.h
> @@ -0,0 +1,76 @@
> +#ifndef BITBANG_MDIO_H
> +#define BITBANG_MDIO_H
> +
> +/*
> + * QEMU Bitbang Ethernet MDIO bus & PHY controllers.
> + *
> + * Copyright (c) 2008 Edgar E. Iglesias, Axis Communications AB.
> + *
> + * Permission is hereby granted, free of charge, to any person obtaining a
> copy
> + * of this software and associated documentation files (the "Software"), to
> deal
> + * in the Software without restriction, including without limitation the
> rights
> + * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
> + * copies of the Software, and to permit persons to whom the Software is
> + * furnished to do so, subject to the following conditions:
> + *
> + * The above copyright notice and this permission notice shall be included in
> + * all copies or substantial portions of the Software.
> + *
> + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
> + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
> + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
> + * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
> + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
> FROM,
> + * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
> + * THE SOFTWARE.
> + */
> +
> +/* PHY Advertisement control register */
> +#define PHY_ADVERTISE_10HALF 0x0020 /* Try for 10mbps half-duplex */
> +#define PHY_ADVERTISE_10FULL 0x0040 /* Try for 10mbps full-duplex */
> +#define PHY_ADVERTISE_100HALF 0x0080 /* Try for 100mbps half-duplex */
> +#define PHY_ADVERTISE_100FULL 0x0100 /* Try for 100mbps full-duplex */
> +
> +struct qemu_phy {
> + uint32_t regs[32];
> +
> + int link;
> +
> + unsigned int (*read)(struct qemu_phy *phy, unsigned int req);
> + void (*write)(struct qemu_phy *phy, unsigned int req, unsigned int data);
> +};
> +
> +struct qemu_mdio {
> + /* bus. */
> + int mdc;
> + int mdio;
> +
> + /* decoder. */
> + enum {
> + PREAMBLE,
> + SOF,
> + OPC,
> + ADDR,
> + REQ,
> + TURNAROUND,
> + DATA
> + } state;
> + unsigned int drive;
> +
> + unsigned int cnt;
> + unsigned int addr;
> + unsigned int opc;
> + unsigned int req;
> + unsigned int data;
> +
> + struct qemu_phy *devs[32];
> +};
> +
> +void tdk_init(struct qemu_phy *phy);
> +void mdio_attach(struct qemu_mdio *bus, struct qemu_phy *phy,
> + unsigned int addr);
> +uint16_t mdio_read_req(struct qemu_mdio *bus, uint8_t addr, uint8_t req);
> +void mdio_write_req(struct qemu_mdio *bus, uint8_t addr, uint8_t req,
> uint16_t data);
> +void mdio_cycle(struct qemu_mdio *bus);
> +
> +#endif
> diff --git a/hw/net/etraxfs_eth.c b/hw/net/etraxfs_eth.c
> index 013c8d0a41..f8d8f8441d 100644
> --- a/hw/net/etraxfs_eth.c
> +++ b/hw/net/etraxfs_eth.c
> @@ -26,287 +26,11 @@
> #include "hw/sysbus.h"
> #include "net/net.h"
> #include "hw/cris/etraxfs.h"
> +#include "hw/net/mdio.h"
> #include "qemu/error-report.h"
>
> #define D(x)
>
> -/* Advertisement control register. */
> -#define ADVERTISE_10HALF 0x0020 /* Try for 10mbps half-duplex */
> -#define ADVERTISE_10FULL 0x0040 /* Try for 10mbps full-duplex */
> -#define ADVERTISE_100HALF 0x0080 /* Try for 100mbps half-duplex */
> -#define ADVERTISE_100FULL 0x0100 /* Try for 100mbps full-duplex */
> -
> -/*
> - * The MDIO extensions in the TDK PHY model were reversed engineered from the
> - * linux driver (PHYID and Diagnostics reg).
> - * TODO: Add friendly names for the register nums.
> - */
> -struct qemu_phy
> -{
> - uint32_t regs[32];
> -
> - int link;
> -
> - unsigned int (*read)(struct qemu_phy *phy, unsigned int req);
> - void (*write)(struct qemu_phy *phy, unsigned int req, unsigned int data);
> -};
> -
> -static unsigned int tdk_read(struct qemu_phy *phy, unsigned int req)
> -{
> - int regnum;
> - unsigned r = 0;
> -
> - regnum = req & 0x1f;
> -
> - switch (regnum) {
> - case 1:
> - if (!phy->link) {
> - break;
> - }
> - /* MR1. */
> - /* Speeds and modes. */
> - r |= (1 << 13) | (1 << 14);
> - r |= (1 << 11) | (1 << 12);
> - r |= (1 << 5); /* Autoneg complete. */
> - r |= (1 << 3); /* Autoneg able. */
> - r |= (1 << 2); /* link. */
> - break;
> - case 5:
> - /* Link partner ability.
> - We are kind; always agree with whatever best mode
> - the guest advertises. */
> - r = 1 << 14; /* Success. */
> - /* Copy advertised modes. */
> - r |= phy->regs[4] & (15 << 5);
> - /* Autoneg support. */
> - r |= 1;
> - break;
> - case 18:
> - {
> - /* Diagnostics reg. */
> - int duplex = 0;
> - int speed_100 = 0;
> -
> - if (!phy->link) {
> - break;
> - }
> -
> - /* Are we advertising 100 half or 100 duplex ? */
> - speed_100 = !!(phy->regs[4] & ADVERTISE_100HALF);
> - speed_100 |= !!(phy->regs[4] & ADVERTISE_100FULL);
> -
> - /* Are we advertising 10 duplex or 100 duplex ? */
> - duplex = !!(phy->regs[4] & ADVERTISE_100FULL);
> - duplex |= !!(phy->regs[4] & ADVERTISE_10FULL);
> - r = (speed_100 << 10) | (duplex << 11);
> - }
> - break;
> -
> - default:
> - r = phy->regs[regnum];
> - break;
> - }
> - D(printf("\n%s %x = reg[%d]\n", __func__, r, regnum));
> - return r;
> -}
> -
> -static void
> -tdk_write(struct qemu_phy *phy, unsigned int req, unsigned int data)
> -{
> - int regnum;
> -
> - regnum = req & 0x1f;
> - D(printf("%s reg[%d] = %x\n", __func__, regnum, data));
> - switch (regnum) {
> - default:
> - phy->regs[regnum] = data;
> - break;
> - }
> -}
> -
> -static void
> -tdk_init(struct qemu_phy *phy)
> -{
> - phy->regs[0] = 0x3100;
> - /* PHY Id. */
> - phy->regs[2] = 0x0300;
> - phy->regs[3] = 0xe400;
> - /* Autonegotiation advertisement reg. */
> - phy->regs[4] = 0x01E1;
> - phy->link = 1;
> -
> - phy->read = tdk_read;
> - phy->write = tdk_write;
> -}
> -
> -struct qemu_mdio
> -{
> - /* bus. */
> - int mdc;
> - int mdio;
> -
> - /* decoder. */
> - enum {
> - PREAMBLE,
> - SOF,
> - OPC,
> - ADDR,
> - REQ,
> - TURNAROUND,
> - DATA
> - } state;
> - unsigned int drive;
> -
> - unsigned int cnt;
> - unsigned int addr;
> - unsigned int opc;
> - unsigned int req;
> - unsigned int data;
> -
> - struct qemu_phy *devs[32];
> -};
> -
> -static void
> -mdio_attach(struct qemu_mdio *bus, struct qemu_phy *phy, unsigned int addr)
> -{
> - bus->devs[addr & 0x1f] = phy;
> -}
> -
> -#ifdef USE_THIS_DEAD_CODE
> -static void
> -mdio_detach(struct qemu_mdio *bus, struct qemu_phy *phy, unsigned int addr)
> -{
> - bus->devs[addr & 0x1f] = NULL;
> -}
> -#endif
> -
> -static void mdio_read_req(struct qemu_mdio *bus)
> -{
> - struct qemu_phy *phy;
> -
> - phy = bus->devs[bus->addr];
> - if (phy && phy->read) {
> - bus->data = phy->read(phy, bus->req);
> - } else {
> - bus->data = 0xffff;
> - }
> -}
> -
> -static void mdio_write_req(struct qemu_mdio *bus)
> -{
> - struct qemu_phy *phy;
> -
> - phy = bus->devs[bus->addr];
> - if (phy && phy->write) {
> - phy->write(phy, bus->req, bus->data);
> - }
> -}
> -
> -static void mdio_cycle(struct qemu_mdio *bus)
> -{
> - bus->cnt++;
> -
> - D(printf("mdc=%d mdio=%d state=%d cnt=%d drv=%d\n",
> - bus->mdc, bus->mdio, bus->state, bus->cnt, bus->drive));
> -#if 0
> - if (bus->mdc) {
> - printf("%d", bus->mdio);
> - }
> -#endif
> - switch (bus->state) {
> - case PREAMBLE:
> - if (bus->mdc) {
> - if (bus->cnt >= (32 * 2) && !bus->mdio) {
> - bus->cnt = 0;
> - bus->state = SOF;
> - bus->data = 0;
> - }
> - }
> - break;
> - case SOF:
> - if (bus->mdc) {
> - if (bus->mdio != 1) {
> - printf("WARNING: no SOF\n");
> - }
> - if (bus->cnt == 1*2) {
> - bus->cnt = 0;
> - bus->opc = 0;
> - bus->state = OPC;
> - }
> - }
> - break;
> - case OPC:
> - if (bus->mdc) {
> - bus->opc <<= 1;
> - bus->opc |= bus->mdio & 1;
> - if (bus->cnt == 2*2) {
> - bus->cnt = 0;
> - bus->addr = 0;
> - bus->state = ADDR;
> - }
> - }
> - break;
> - case ADDR:
> - if (bus->mdc) {
> - bus->addr <<= 1;
> - bus->addr |= bus->mdio & 1;
> -
> - if (bus->cnt == 5*2) {
> - bus->cnt = 0;
> - bus->req = 0;
> - bus->state = REQ;
> - }
> - }
> - break;
> - case REQ:
> - if (bus->mdc) {
> - bus->req <<= 1;
> - bus->req |= bus->mdio & 1;
> - if (bus->cnt == 5*2) {
> - bus->cnt = 0;
> - bus->state = TURNAROUND;
> - }
> - }
> - break;
> - case TURNAROUND:
> - if (bus->mdc && bus->cnt == 2*2) {
> - bus->mdio = 0;
> - bus->cnt = 0;
> -
> - if (bus->opc == 2) {
> - bus->drive = 1;
> - mdio_read_req(bus);
> - bus->mdio = bus->data & 1;
> - }
> - bus->state = DATA;
> - }
> - break;
> - case DATA:
> - if (!bus->mdc) {
> - if (bus->drive) {
> - bus->mdio = !!(bus->data & (1 << 15));
> - bus->data <<= 1;
> - }
> - } else {
> - if (!bus->drive) {
> - bus->data <<= 1;
> - bus->data |= bus->mdio;
> - }
> - if (bus->cnt == 16 * 2) {
> - bus->cnt = 0;
> - bus->state = PREAMBLE;
> - if (!bus->drive) {
> - mdio_write_req(bus);
> - }
> - bus->drive = 0;
> - }
> - }
> - break;
> - default:
> - break;
> - }
> -}
> -
> /* ETRAX-FS Ethernet MAC block starts here. */
>
> #define RW_MA0_LO 0x00
> diff --git a/hw/net/mdio.c b/hw/net/mdio.c
> new file mode 100644
> index 0000000000..3763fcc8af
> --- /dev/null
> +++ b/hw/net/mdio.c
> @@ -0,0 +1,262 @@
> +/*
> + * QEMU Ethernet MDIO bus & PHY models
> + *
> + * Copyright (c) 2008 Edgar E. Iglesias, Axis Communications AB.
> + *
> + * Permission is hereby granted, free of charge, to any person obtaining a
> copy
> + * of this software and associated documentation files (the "Software"), to
> deal
> + * in the Software without restriction, including without limitation the
> rights
> + * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
> + * copies of the Software, and to permit persons to whom the Software is
> + * furnished to do so, subject to the following conditions:
> + *
> + * The above copyright notice and this permission notice shall be included in
> + * all copies or substantial portions of the Software.
> + *
> + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
> + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
> + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
> + * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
> + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
> FROM,
> + * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
> + * THE SOFTWARE.
> + *
> + * This is a generic MDIO implementation.
> + *
> + * TODO:
> + * - Split PHYs out as separate device models so they can be defined and
> + * instantiated separately from the MDIO bus.
> + * - Split out bitbang state machine into a separate model. Mostly this
> consists
> + * of the mdio_cycle() routine and the bitbang state data in struct
> qemu_mdio
> + * - Use the GPIO interface for driving bitbang
> + */
> +
> +#include "qemu/osdep.h"
> +#include "qemu-common.h"
> +#include "qemu/log.h"
> +#include "hw/net/mdio.h"
> +
> +#define D(x)
This should be updated to the new way to handle QEMU logging.
Otherwise this patch looks fine to me.
Alistair
> +
> +/*
> + * The MDIO extensions in the TDK PHY model were reversed engineered from the
> + * linux driver (PHYID and Diagnostics reg).
> + * TODO: Add friendly names for the register nums.
> + */
> +static unsigned int tdk_read(struct qemu_phy *phy, unsigned int req)
> +{
> + int regnum;
> + unsigned r = 0;
> +
> + regnum = req & 0x1f;
> +
> + switch (regnum) {
> + case 1:
> + if (!phy->link) {
> + break;
> + }
> + /* MR1. */
> + /* Speeds and modes. */
> + r |= (1 << 13) | (1 << 14);
> + r |= (1 << 11) | (1 << 12);
> + r |= (1 << 5); /* Autoneg complete. */
> + r |= (1 << 3); /* Autoneg able. */
> + r |= (1 << 2); /* link. */
> + r |= (1 << 1); /* link. */
> + break;
> + case 5:
> + /* Link partner ability.
> + We are kind; always agree with whatever best mode
> + the guest advertises. */
> + r = 1 << 14; /* Success. */
> + /* Copy advertised modes. */
> + r |= phy->regs[4] & (15 << 5);
> + /* Autoneg support. */
> + r |= 1;
> + break;
> + case 17:
> + /* Marvel PHY on many xilinx boards. */
> + r = 0x8000; /* 1000Mb */
> + break;
> + case 18:
> + {
> + /* Diagnostics reg. */
> + int duplex = 0;
> + int speed_100 = 0;
> +
> + if (!phy->link) {
> + break;
> + }
> +
> + /* Are we advertising 100 half or 100 duplex ? */
> + speed_100 = !!(phy->regs[4] & PHY_ADVERTISE_100HALF);
> + speed_100 |= !!(phy->regs[4] & PHY_ADVERTISE_100FULL);
> +
> + /* Are we advertising 10 duplex or 100 duplex ? */
> + duplex = !!(phy->regs[4] & PHY_ADVERTISE_100FULL);
> + duplex |= !!(phy->regs[4] & PHY_ADVERTISE_10FULL);
> + r = (speed_100 << 10) | (duplex << 11);
> + }
> + break;
> +
> + default:
> + r = phy->regs[regnum];
> + break;
> + }
> + D(printf("\n%s %x = reg[%d]\n", __func__, r, regnum));
> + return r;
> +}
> +
> +static void tdk_write(struct qemu_phy *phy, unsigned int req, unsigned int
> data)
> +{
> + int regnum;
> +
> + regnum = req & 0x1f;
> + D(printf("%s reg[%d] = %x\n", __func__, regnum, data));
> + switch (regnum) {
> + default:
> + phy->regs[regnum] = data;
> + break;
> + }
> +}
> +
> +void tdk_init(struct qemu_phy *phy)
> +{
> + phy->regs[0] = 0x3100;
> + /* PHY Id. */
> + phy->regs[2] = 0x0300;
> + phy->regs[3] = 0xe400;
> + /* Autonegotiation advertisement reg. */
> + phy->regs[4] = 0x01e1;
> + phy->link = 1;
> +
> + phy->read = tdk_read;
> + phy->write = tdk_write;
> +}
> +
> +void mdio_attach(struct qemu_mdio *bus, struct qemu_phy *phy, unsigned int
> addr)
> +{
> + bus->devs[addr & 0x1f] = phy;
> +}
> +
> +uint16_t mdio_read_req(struct qemu_mdio *bus, uint8_t addr, uint8_t req)
> +{
> + struct qemu_phy *phy;
> +
> + phy = bus->devs[bus->addr];
> + if (phy && phy->read) {
> + return phy->read(phy, req);
> + }
> + return 0xffff;
> +}
> +
> +void mdio_write_req(struct qemu_mdio *bus, uint8_t addr, uint8_t req,
> + uint16_t data)
> +{
> + struct qemu_phy *phy;
> +
> + phy = bus->devs[bus->addr];
> + if (phy && phy->write) {
> + phy->write(phy, req, data);
> + }
> +}
> +
> +void mdio_cycle(struct qemu_mdio *bus)
> +{
> + bus->cnt++;
> +
> + D(printf("mdc=%d mdio=%d state=%d cnt=%d drv=%d\n",
> + bus->mdc, bus->mdio, bus->state, bus->cnt, bus->drive));
> + switch (bus->state) {
> + case PREAMBLE:
> + if (bus->mdc) {
> + if (bus->cnt >= (32 * 2) && !bus->mdio) {
> + bus->cnt = 0;
> + bus->state = SOF;
> + bus->data = 0;
> + }
> + }
> + break;
> + case SOF:
> + if (bus->mdc) {
> + if (bus->mdio != 1) {
> + printf("WARNING: no SOF\n");
> + }
> + if (bus->cnt == 1 * 2) {
> + bus->cnt = 0;
> + bus->opc = 0;
> + bus->state = OPC;
> + }
> + }
> + break;
> + case OPC:
> + if (bus->mdc) {
> + bus->opc <<= 1;
> + bus->opc |= bus->mdio & 1;
> + if (bus->cnt == 2 * 2) {
> + bus->cnt = 0;
> + bus->addr = 0;
> + bus->state = ADDR;
> + }
> + }
> + break;
> + case ADDR:
> + if (bus->mdc) {
> + bus->addr <<= 1;
> + bus->addr |= bus->mdio & 1;
> +
> + if (bus->cnt == 5 * 2) {
> + bus->cnt = 0;
> + bus->req = 0;
> + bus->state = REQ;
> + }
> + }
> + break;
> + case REQ:
> + if (bus->mdc) {
> + bus->req <<= 1;
> + bus->req |= bus->mdio & 1;
> + if (bus->cnt == 5 * 2) {
> + bus->cnt = 0;
> + bus->state = TURNAROUND;
> + }
> + }
> + break;
> + case TURNAROUND:
> + if (bus->mdc && bus->cnt == 2 * 2) {
> + bus->mdio = 0;
> + bus->cnt = 0;
> +
> + if (bus->opc == 2) {
> + bus->drive = 1;
> + bus->data = mdio_read_req(bus, bus->addr, bus->req);
> + bus->mdio = bus->data & 1;
> + }
> + bus->state = DATA;
> + }
> + break;
> + case DATA:
> + if (!bus->mdc) {
> + if (bus->drive) {
> + bus->mdio = !!(bus->data & (1 << 15));
> + bus->data <<= 1;
> + }
> + } else {
> + if (!bus->drive) {
> + bus->data <<= 1;
> + bus->data |= bus->mdio;
> + }
> + if (bus->cnt == 16 * 2) {
> + bus->cnt = 0;
> + bus->state = PREAMBLE;
> + if (!bus->drive) {
> + mdio_write_req(bus, bus->addr, bus->req, bus->data);
> + }
> + bus->drive = 0;
> + }
> + }
> + break;
> + default:
> + break;
> + }
> +}
> diff --git a/hw/net/xilinx_axienet.c b/hw/net/xilinx_axienet.c
> index d4c2c89dc1..1e859fdaae 100644
> --- a/hw/net/xilinx_axienet.c
> +++ b/hw/net/xilinx_axienet.c
> @@ -26,13 +26,12 @@
> #include "hw/sysbus.h"
> #include "qapi/error.h"
> #include "qemu/log.h"
> +#include "hw/net/mdio.h"
> #include "net/net.h"
> #include "net/checksum.h"
>
> #include "hw/stream.h"
>
> -#define DPHY(x)
> -
> #define TYPE_XILINX_AXI_ENET "xlnx.axi-ethernet"
> #define TYPE_XILINX_AXI_ENET_DATA_STREAM "xilinx-axienet-data-stream"
> #define TYPE_XILINX_AXI_ENET_CONTROL_STREAM "xilinx-axienet-control-stream"
> @@ -48,189 +47,9 @@
> OBJECT_CHECK(XilinxAXIEnetStreamSlave, (obj),\
> TYPE_XILINX_AXI_ENET_CONTROL_STREAM)
>
> -/* Advertisement control register. */
> -#define ADVERTISE_10HALF 0x0020 /* Try for 10mbps half-duplex */
> -#define ADVERTISE_10FULL 0x0040 /* Try for 10mbps full-duplex */
> -#define ADVERTISE_100HALF 0x0080 /* Try for 100mbps half-duplex */
> -#define ADVERTISE_100FULL 0x0100 /* Try for 100mbps full-duplex */
> -
> #define CONTROL_PAYLOAD_WORDS 5
> #define CONTROL_PAYLOAD_SIZE (CONTROL_PAYLOAD_WORDS * (sizeof(uint32_t)))
>
> -struct PHY {
> - uint32_t regs[32];
> -
> - int link;
> -
> - unsigned int (*read)(struct PHY *phy, unsigned int req);
> - void (*write)(struct PHY *phy, unsigned int req,
> - unsigned int data);
> -};
> -
> -static unsigned int tdk_read(struct PHY *phy, unsigned int req)
> -{
> - int regnum;
> - unsigned r = 0;
> -
> - regnum = req & 0x1f;
> -
> - switch (regnum) {
> - case 1:
> - if (!phy->link) {
> - break;
> - }
> - /* MR1. */
> - /* Speeds and modes. */
> - r |= (1 << 13) | (1 << 14);
> - r |= (1 << 11) | (1 << 12);
> - r |= (1 << 5); /* Autoneg complete. */
> - r |= (1 << 3); /* Autoneg able. */
> - r |= (1 << 2); /* link. */
> - r |= (1 << 1); /* link. */
> - break;
> - case 5:
> - /* Link partner ability.
> - We are kind; always agree with whatever best mode
> - the guest advertises. */
> - r = 1 << 14; /* Success. */
> - /* Copy advertised modes. */
> - r |= phy->regs[4] & (15 << 5);
> - /* Autoneg support. */
> - r |= 1;
> - break;
> - case 17:
> - /* Marvell PHY on many xilinx boards. */
> - r = 0x8000; /* 1000Mb */
> - break;
> - case 18:
> - {
> - /* Diagnostics reg. */
> - int duplex = 0;
> - int speed_100 = 0;
> -
> - if (!phy->link) {
> - break;
> - }
> -
> - /* Are we advertising 100 half or 100 duplex ? */
> - speed_100 = !!(phy->regs[4] & ADVERTISE_100HALF);
> - speed_100 |= !!(phy->regs[4] & ADVERTISE_100FULL);
> -
> - /* Are we advertising 10 duplex or 100 duplex ? */
> - duplex = !!(phy->regs[4] & ADVERTISE_100FULL);
> - duplex |= !!(phy->regs[4] & ADVERTISE_10FULL);
> - r = (speed_100 << 10) | (duplex << 11);
> - }
> - break;
> -
> - default:
> - r = phy->regs[regnum];
> - break;
> - }
> - DPHY(qemu_log("\n%s %x = reg[%d]\n", __func__, r, regnum));
> - return r;
> -}
> -
> -static void
> -tdk_write(struct PHY *phy, unsigned int req, unsigned int data)
> -{
> - int regnum;
> -
> - regnum = req & 0x1f;
> - DPHY(qemu_log("%s reg[%d] = %x\n", __func__, regnum, data));
> - switch (regnum) {
> - default:
> - phy->regs[regnum] = data;
> - break;
> - }
> -
> - /* Unconditionally clear regs[BMCR][BMCR_RESET] */
> - phy->regs[0] &= ~0x8000;
> -}
> -
> -static void
> -tdk_init(struct PHY *phy)
> -{
> - phy->regs[0] = 0x3100;
> - /* PHY Id. */
> - phy->regs[2] = 0x0300;
> - phy->regs[3] = 0xe400;
> - /* Autonegotiation advertisement reg. */
> - phy->regs[4] = 0x01E1;
> - phy->link = 1;
> -
> - phy->read = tdk_read;
> - phy->write = tdk_write;
> -}
> -
> -struct MDIOBus {
> - /* bus. */
> - int mdc;
> - int mdio;
> -
> - /* decoder. */
> - enum {
> - PREAMBLE,
> - SOF,
> - OPC,
> - ADDR,
> - REQ,
> - TURNAROUND,
> - DATA
> - } state;
> - unsigned int drive;
> -
> - unsigned int cnt;
> - unsigned int addr;
> - unsigned int opc;
> - unsigned int req;
> - unsigned int data;
> -
> - struct PHY *devs[32];
> -};
> -
> -static void
> -mdio_attach(struct MDIOBus *bus, struct PHY *phy, unsigned int addr)
> -{
> - bus->devs[addr & 0x1f] = phy;
> -}
> -
> -#ifdef USE_THIS_DEAD_CODE
> -static void
> -mdio_detach(struct MDIOBus *bus, struct PHY *phy, unsigned int addr)
> -{
> - bus->devs[addr & 0x1f] = NULL;
> -}
> -#endif
> -
> -static uint16_t mdio_read_req(struct MDIOBus *bus, unsigned int addr,
> - unsigned int reg)
> -{
> - struct PHY *phy;
> - uint16_t data;
> -
> - phy = bus->devs[addr];
> - if (phy && phy->read) {
> - data = phy->read(phy, reg);
> - } else {
> - data = 0xffff;
> - }
> - DPHY(qemu_log("%s addr=%d reg=%d data=%x\n", __func__, addr, reg, data));
> - return data;
> -}
> -
> -static void mdio_write_req(struct MDIOBus *bus, unsigned int addr,
> - unsigned int reg, uint16_t data)
> -{
> - struct PHY *phy;
> -
> - DPHY(qemu_log("%s addr=%d reg=%d data=%x\n", __func__, addr, reg, data));
> - phy = bus->devs[addr];
> - if (phy && phy->write) {
> - phy->write(phy, reg, data);
> - }
> -}
> -
> #define DENET(x)
>
> #define R_RAF (0x000 / 4)
> @@ -322,8 +141,8 @@ enum {
>
> /* Indirect registers. */
> struct TEMAC {
> - struct MDIOBus mdio_bus;
> - struct PHY phy;
> + struct qemu_mdio mdio_bus;
> + struct qemu_phy phy;
>
> void *parent;
> };
> diff --git a/hw/net/Makefile.objs b/hw/net/Makefile.objs
> index 4171af0b5d..a020963d10 100644
> --- a/hw/net/Makefile.objs
> +++ b/hw/net/Makefile.objs
> @@ -30,6 +30,8 @@ common-obj-$(CONFIG_SUNHME) += sunhme.o
> common-obj-$(CONFIG_FTGMAC100) += ftgmac100.o
> common-obj-$(CONFIG_SUNGEM) += sungem.o
>
> +common-obj-y += mdio.o
> +
> obj-$(CONFIG_ETRAXFS) += etraxfs_eth.o
> obj-$(CONFIG_COLDFIRE) += mcf_fec.o
> obj-$(CONFIG_MILKYMIST) += milkymist-minimac2.o
> --
> 2.14.1
>
>
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- Re: [Qemu-devel] [PATCH v5 1/7] hw/mdio: Generalize etraxfs MDIO bitbanging emulation,
Alistair Francis <=