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Date: Wed, 1 Apr 2020 08:07:11 +0300
From: "Shmuel H." <sh@...s.co.il>
To: Baruch Siach <baruch@...s.co.il>,
Russell King - ARM Linux admin <linux@...linux.org.uk>
Cc: netdev@...r.kernel.org, Andrew Lunn <andrew@...n.ch>,
Florian Fainelli <f.fainelli@...il.com>,
Heiner Kallweit <hkallweit1@...il.com>
Subject: Re: [PATCH] net: phy: marvell10g: add firmware load support
Hi Baruch,
On 01/04/2020 08:01, Baruch Siach wrote:
> Hi Russell,
>
> On Tue, Mar 31 2020, Russell King - ARM Linux admin wrote:
>> On Tue, Mar 31, 2020 at 08:47:38PM +0300, Baruch Siach wrote:
>>> When Marvell 88X3310 and 88E2110 hardware configuration SPI_CONFIG strap
>>> bit is pulled up, the host must load firmware to the PHY after reset.
>>> Add support for loading firmware.
>>>
>>> Firmware files are available from Marvell under NDA.
>> As I understand it, the firmware for the different revisions of the
>> 88x3310 are different, so I think the current derivation of filenames
>> is not correct.
> I was not aware of that.
>
> Shmuel, have you seen different firmware revisions from Marvell for 88x3310?
There are many firmware revisions, but I didn't see any mention of one
being compatible with a specific HW revision on the changelog / datasheets.
>
>> Is this code theoretical, or has it been tested on such a system? As
>> far as I'm aware, all the 3310 systems out there so far have been
>> strapped to boot the firmware from SPI.
> I tested this code on a system with 88E2110. Shmuel tested similar code
> with 88X3310. In both cases the hardware designer preferred run-time
> load of PHY firmware.
>
> baruch
>
>>> Signed-off-by: Baruch Siach <baruch@...s.co.il>
>>> ---
>>> drivers/net/phy/marvell10g.c | 114 +++++++++++++++++++++++++++++++++++
>>> 1 file changed, 114 insertions(+)
>>>
>>> diff --git a/drivers/net/phy/marvell10g.c b/drivers/net/phy/marvell10g.c
>>> index 64c9f3bba2cd..9572426ba1c6 100644
>>> --- a/drivers/net/phy/marvell10g.c
>>> +++ b/drivers/net/phy/marvell10g.c
>>> @@ -27,13 +27,28 @@
>>> #include <linux/marvell_phy.h>
>>> #include <linux/phy.h>
>>> #include <linux/sfp.h>
>>> +#include <linux/firmware.h>
>>> +#include <linux/delay.h>
>>>
>>> #define MV_PHY_ALASKA_NBT_QUIRK_MASK 0xfffffffe
>>> #define MV_PHY_ALASKA_NBT_QUIRK_REV (MARVELL_PHY_ID_88X3310 | 0xa)
>>>
>>> +#define MV_FIRMWARE_HEADER_SIZE 32
>>> +
>>> enum {
>>> MV_PMA_BOOT = 0xc050,
>>> MV_PMA_BOOT_FATAL = BIT(0),
>>> + MV_PMA_BOOT_PROGRESS_MASK = 0x0006,
>>> + MV_PMA_BOOT_WAITING = 0x0002,
>>> + MV_PMA_BOOT_FW_LOADED = BIT(6),
>>> +
>>> + MV_PCS_FW_LOW_WORD = 0xd0f0,
>>> + MV_PCS_FW_HIGH_WORD = 0xd0f1,
>>> + MV_PCS_RAM_DATA = 0xd0f2,
>>> + MV_PCS_RAM_CHECKSUM = 0xd0f3,
>>> +
>>> + MV_PMA_FW_REV1 = 0xc011,
>>> + MV_PMA_FW_REV2 = 0xc012,
>>>
>>> MV_PCS_BASE_T = 0x0000,
>>> MV_PCS_BASE_R = 0x1000,
>>> @@ -223,6 +238,99 @@ static int mv3310_sfp_insert(void *upstream, const struct sfp_eeprom_id *id)
>>> return 0;
>>> }
>>>
>>> +static int mv3310_write_firmware(struct phy_device *phydev, const u8 *data,
>>> + unsigned int size)
>>> +{
>>> + unsigned int low_byte, high_byte;
>>> + u16 checksum = 0, ram_checksum;
>>> + unsigned int i = 0;
>>> +
>>> + while (i < size) {
>>> + low_byte = data[i++];
>>> + high_byte = data[i++];
>>> + checksum += low_byte + high_byte;
>>> + phy_write_mmd(phydev, MDIO_MMD_PCS, MV_PCS_RAM_DATA,
>>> + (high_byte << 8) | low_byte);
>>> + cond_resched();
>>> + }
>>> +
>>> + ram_checksum = phy_read_mmd(phydev, MDIO_MMD_PCS, MV_PCS_RAM_CHECKSUM);
>>> + if (ram_checksum != checksum) {
>>> + dev_err(&phydev->mdio.dev, "firmware checksum failed");
>>> + return -EIO;
>>> + }
>>> +
>>> + return 0;
>>> +}
>>> +
>>> +static void mv3310_report_firmware_rev(struct phy_device *phydev)
>>> +{
>>> + int rev1, rev2;
>>> +
>>> + rev1 = phy_read_mmd(phydev, MDIO_MMD_PMAPMD, MV_PMA_FW_REV1);
>>> + rev2 = phy_read_mmd(phydev, MDIO_MMD_PMAPMD, MV_PMA_FW_REV2);
>>> + if (rev1 < 0 || rev2 < 0)
>>> + return;
>>> +
>>> + dev_info(&phydev->mdio.dev, "Loaded firmware revision %d.%d.%d.%d",
>>> + (rev1 & 0xff00) >> 8, rev1 & 0x00ff,
>>> + (rev2 & 0xff00) >> 8, rev2 & 0x00ff);
>>> +}
>>> +
>>> +static int mv3310_load_firmware(struct phy_device *phydev)
>>> +{
>>> + const struct firmware *fw_entry;
>>> + char *fw_file;
>>> + int ret;
>>> +
>>> + switch (phydev->drv->phy_id) {
>>> + case MARVELL_PHY_ID_88X3310:
>>> + fw_file = "mrvl/x3310fw.hdr";
>>> + break;
>>> + case MARVELL_PHY_ID_88E2110:
>>> + fw_file = "mrvl/e21x0fw.hdr";
>>> + break;
>>> + default:
>>> + dev_warn(&phydev->mdio.dev, "unknown firmware file for %s PHY",
>>> + phydev->drv->name);
>>> + return -EINVAL;
>>> + }
>>> +
>>> + ret = request_firmware(&fw_entry, fw_file, &phydev->mdio.dev);
>>> + if (ret < 0)
>>> + return ret;
>>> +
>>> + /* Firmware size must be larger than header, and even */
>>> + if (fw_entry->size <= MV_FIRMWARE_HEADER_SIZE ||
>>> + (fw_entry->size % 2) != 0) {
>>> + dev_err(&phydev->mdio.dev, "firmware file invalid");
>>> + return -EINVAL;
>>> + }
>>> +
>>> + /* Clear checksum register */
>>> + phy_read_mmd(phydev, MDIO_MMD_PCS, MV_PCS_RAM_CHECKSUM);
>>> +
>>> + /* Set firmware load address */
>>> + phy_write_mmd(phydev, MDIO_MMD_PCS, MV_PCS_FW_LOW_WORD, 0);
>>> + phy_write_mmd(phydev, MDIO_MMD_PCS, MV_PCS_FW_HIGH_WORD, 0x0010);
>>> +
>>> + ret = mv3310_write_firmware(phydev,
>>> + fw_entry->data + MV_FIRMWARE_HEADER_SIZE,
>>> + fw_entry->size - MV_FIRMWARE_HEADER_SIZE);
>>> + if (ret < 0)
>>> + return ret;
>>> +
>>> + phy_modify_mmd(phydev, MDIO_MMD_PMAPMD, MV_PMA_BOOT,
>>> + MV_PMA_BOOT_FW_LOADED, MV_PMA_BOOT_FW_LOADED);
>>> +
>>> + release_firmware(fw_entry);
>>> +
>>> + msleep(100);
>>> + mv3310_report_firmware_rev(phydev);
>>> +
>>> + return 0;
>>> +}
>>> +
>>> static const struct sfp_upstream_ops mv3310_sfp_ops = {
>>> .attach = phy_sfp_attach,
>>> .detach = phy_sfp_detach,
>>> @@ -249,6 +357,12 @@ static int mv3310_probe(struct phy_device *phydev)
>>> return -ENODEV;
>>> }
>>>
>>> + if ((ret & MV_PMA_BOOT_PROGRESS_MASK) == MV_PMA_BOOT_WAITING) {
>>> + ret = mv3310_load_firmware(phydev);
>>> + if (ret < 0)
>>> + return ret;
>>> + }
>>> +
>>> priv = devm_kzalloc(&phydev->mdio.dev, sizeof(*priv), GFP_KERNEL);
>>> if (!priv)
>>> return -ENOMEM;
>>> --
>>> 2.25.1
>>>
>>>
>
> --
> http://baruch.siach.name/blog/ ~. .~ Tk Open Systems
> =}------------------------------------------------ooO--U--Ooo------------{=
> - baruch@...s.co.il - tel: +972.52.368.4656, http://www.tkos.co.il -
--
- Shmuel Hazan
mailto:sh@...s.co.il | tel:+972-523-746-435 | http://tkos.co.il
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