Re: [PATCH 08/17] MIPS: loongson32: Convert Ethernet platform device to DT

From: Keguang Zhang
Date: Wed Aug 02 2023 - 07:20:21 EST

On Wed, Aug 2, 2023 at 5:44 PM Serge Semin <fancer.lancer@xxxxxxxxx> wrote:
>
> On Wed, Aug 02, 2023 at 11:10:10AM +0800, Keguang Zhang wrote:
> > On Wed, Aug 2, 2023 at 2:21 AM Serge Semin <fancer.lancer@xxxxxxxxx> wrote:
> > >
> > > On Sat, Jul 29, 2023 at 09:43:09PM +0800, Keguang Zhang wrote:
> > > > Add Ethernet device nodes for Loongson-1 boards,
> > > > and drop the legacy platform devices and data accordingly.
> > >
> > > It seems to me that your conversion breaks the RGMII mode support.
> > > What you need to do is to make sure that the respective flags are set
> > > in the MUX space.
> > >
> > > Regarding the MUX-space. It looks as a pinctrl-setting space. If so
> > > adding the new pinctrl driver will be required. Otherwise it can be
> > > defined as a syscon-node and then utilized in the Loongson-1 GMAC
> > > low-level driver.
> > >
>
> > Thanks for your reminder.
> > I planned to add the pinctrl driver later.
> > Now I'm working on it.
>
> I have been having a patch moving the Loongson32 MAC driver to the
> STMMAC driver directory for quite a while in my tree. You can use it
> in your series (completely, as a reference or template, whatever). The
> only thing you'll need to do is to add the pinctrl-based version of
> the ls1b_eth_mux_init()/ls1c_eth_mux_init() methods in there and
> test/debug it of course.
>
> Note 1. It seems to me that it would work better if you defined the
> plat_stmmacenet_data.fix_mac_speed() callback instead of
> plat_stmmacenet_data.init() for LS1B which supports MII and RGMII aka
> 100Mbps and 1000Mbps speeds.
>
Thanks!
I will look into it.
However, I think ls1x_eth_mux_init() belongs to the scope of pinctrl or syscon.
IMHO it is not worth implementing a glue driver for Loongson1.

> Note 2. The patch I've sent was only built-tested. I don't have any
> Loongson hardware.
>
> Note 3. After the suggested patch is applied you can also completely
> move the include/linux/stmmac.h header file to the STMMAC-driver
> directory as a following up cleanup update (it should be renamed to
> stmmac_platform.h since stmmac.h is already available in there).
> It can be done since there won't any users of that file outside the
> STMMAC-driver directory. So there is no point in keeping it in the
> common headers directory anymore.
>
> -Serge(y)
>
> >
> > > -Serge(y)
> > >
> > > >
> > > > Signed-off-by: Keguang Zhang <keguang.zhang@xxxxxxxxx>
> > > > ---
> > > > arch/mips/boot/dts/loongson/loongson1.dtsi | 16 ++
> > > > arch/mips/boot/dts/loongson/loongson1b.dtsi | 53 +++++++
> > > > arch/mips/boot/dts/loongson/loongson1c.dtsi | 17 ++
> > > > arch/mips/boot/dts/loongson/lsgz_1b_dev.dts | 8 +
> > > > arch/mips/boot/dts/loongson/smartloong_1c.dts | 4 +
> > > > arch/mips/loongson32/common/platform.c | 146 +-----------------
> > > > arch/mips/loongson32/ls1b/board.c | 2 -
> > > > arch/mips/loongson32/ls1c/board.c | 1 -
> > > > 8 files changed, 99 insertions(+), 148 deletions(-)
> > > >
> > > > diff --git a/arch/mips/boot/dts/loongson/loongson1.dtsi b/arch/mips/boot/dts/loongson/loongson1.dtsi
> > > > index c77aa2d0f66c..48bb786bbf10 100644
> > > > --- a/arch/mips/boot/dts/loongson/loongson1.dtsi
> > > > +++ b/arch/mips/boot/dts/loongson/loongson1.dtsi
> > > > @@ -71,6 +71,22 @@ intc3: interrupt-controller@1fd01088 {
> > > > interrupt-parent = <&cpu_intc>;
> > > > interrupts = <5>;
> > > > };
> > > > +
> > > > + gmac0: ethernet@1fe10000 {
> > > > + compatible = "snps,dwmac-3.70a";
> > > > + reg = <0x1fe10000 0x10000>;
> > > > +
> > > > + interrupt-parent = <&intc1>;
> > > > + interrupt-names = "macirq";
> > > > +
> > > > + clocks = <&clkc LS1X_CLKID_AHB>;
> > > > + clock-names = "stmmaceth";
> > > > +
> > > > + snps,pbl = <1>;
> > > > +
> > > > + status = "disabled";
> > > > + };
> > > > +
> > > > };
> > > >
> > > > apb: bus@1fe40000 {
> > > > diff --git a/arch/mips/boot/dts/loongson/loongson1b.dtsi b/arch/mips/boot/dts/loongson/loongson1b.dtsi
> > > > index 437a77cee163..42b96c557660 100644
> > > > --- a/arch/mips/boot/dts/loongson/loongson1b.dtsi
> > > > +++ b/arch/mips/boot/dts/loongson/loongson1b.dtsi
> > > > @@ -7,6 +7,11 @@
> > > > #include "loongson1.dtsi"
> > > >
> > > > / {
> > > > + aliases {
> > > > + ethernet0 = &gmac0;
> > > > + ethernet1 = &gmac1;
> > > > + };
> > > > +
> > > > cpus {
> > > > #address-cells = <1>;
> > > > #size-cells = <0>;
> > > > @@ -74,6 +79,54 @@ clkc: clock-controller@1fe78030 {
> > > > };
> > > > };
> > > >
> > > > +&ahb {
> > > > + gmac1: ethernet@1fe20000 {
> > > > + compatible = "snps,dwmac-3.70a";
> > > > + reg = <0x1fe20000 0x10000>;
> > > > +
> > > > + interrupt-parent = <&intc1>;
> > > > + interrupts = <3 IRQ_TYPE_LEVEL_HIGH>;
> > > > + interrupt-names = "macirq";
> > > > +
> > > > + clocks = <&clkc LS1X_CLKID_AHB>;
> > > > + clock-names = "stmmaceth";
> > > > +
> > > > + phy-handle = <&phy1>;
> > > > + phy-mode = "mii";
> > > > +
> > > > + snps,pbl = <1>;
> > > > +
> > > > + status = "disabled";
> > > > +
> > > > + mdio1 {
> > > > + #address-cells = <1>;
> > > > + #size-cells = <0>;
> > > > + compatible = "snps,dwmac-mdio";
> > > > +
> > > > + phy1: ethernet-phy@0 {
> > > > + reg = <0x0>;
> > > > + };
> > > > + };
> > > > + };
> > > > +};
> > > > +
> > > > +&gmac0 {
> > > > + interrupts = <2 IRQ_TYPE_LEVEL_HIGH>;
> > > > +
> > > > + phy-handle = <&phy0>;
> > > > + phy-mode = "mii";
> > > > +
> > > > + mdio0 {
> > > > + #address-cells = <1>;
> > > > + #size-cells = <0>;
> > > > + compatible = "snps,dwmac-mdio";
> > > > +
> > > > + phy0: ethernet-phy@0 {
> > > > + reg = <0x0>;
> > > > + };
> > > > + };
> > > > +};
> > > > +
> > > > &uart1 {
> > > > interrupts = <3 IRQ_TYPE_LEVEL_HIGH>;
> > > > };
> > > > diff --git a/arch/mips/boot/dts/loongson/loongson1c.dtsi b/arch/mips/boot/dts/loongson/loongson1c.dtsi
> > > > index 1dd575b7b2f9..5b3e0f9280f6 100644
> > > > --- a/arch/mips/boot/dts/loongson/loongson1c.dtsi
> > > > +++ b/arch/mips/boot/dts/loongson/loongson1c.dtsi
> > > > @@ -41,6 +41,23 @@ intc4: interrupt-controller@1fd010a0 {
> > > > };
> > > > };
> > > >
> > > > +&gmac0 {
> > > > + interrupts = <3 IRQ_TYPE_LEVEL_HIGH>;
> > > > +
> > > > + phy-handle = <&phy0>;
> > > > + phy-mode = "rmii";
> > > > +
> > > > + mdio0 {
> > > > + #address-cells = <1>;
> > > > + #size-cells = <0>;
> > > > + compatible = "snps,dwmac-mdio";
> > > > +
> > > > + phy0: ethernet-phy@13 {
> > > > + reg = <0x13>;
> > > > + };
> > > > + };
> > > > +};
> > > > +
> > > > &uart1 {
> > > > interrupts = <4 IRQ_TYPE_LEVEL_HIGH>;
> > > > };
> > > > diff --git a/arch/mips/boot/dts/loongson/lsgz_1b_dev.dts b/arch/mips/boot/dts/loongson/lsgz_1b_dev.dts
> > > > index 89c3dfa574f7..a43df21f2904 100644
> > > > --- a/arch/mips/boot/dts/loongson/lsgz_1b_dev.dts
> > > > +++ b/arch/mips/boot/dts/loongson/lsgz_1b_dev.dts
> > > > @@ -28,6 +28,14 @@ xtal: xtal {
> > > > };
> > > > };
> > > >
> > > > +&gmac0 {
> > > > + status = "okay";
> > > > +};
> > > > +
> > > > +&gmac1 {
> > > > + status = "okay";
> > > > +};
> > > > +
> > > > &uart0 {
> > > > status = "okay";
> > > > };
> > > > diff --git a/arch/mips/boot/dts/loongson/smartloong_1c.dts b/arch/mips/boot/dts/loongson/smartloong_1c.dts
> > > > index 188aab9e3685..2d8f304aa2c4 100644
> > > > --- a/arch/mips/boot/dts/loongson/smartloong_1c.dts
> > > > +++ b/arch/mips/boot/dts/loongson/smartloong_1c.dts
> > > > @@ -28,6 +28,10 @@ xtal: xtal {
> > > > };
> > > > };
> > > >
> > > > +&gmac0 {
> > > > + status = "okay";
> > > > +};
> > > > +
> > > > &uart0 {
> > > > status = "okay";
> > > > };
> > > > diff --git a/arch/mips/loongson32/common/platform.c b/arch/mips/loongson32/common/platform.c
> > > > index 8272b4133e25..817518531b9b 100644
> > > > --- a/arch/mips/loongson32/common/platform.c
> > > > +++ b/arch/mips/loongson32/common/platform.c
> > > > @@ -8,157 +8,13 @@
> > > > #include <linux/err.h>
> > > > #include <linux/mtd/partitions.h>
> > > > #include <linux/sizes.h>
> > > > -#include <linux/phy.h>
> > > > -#include <linux/stmmac.h>
> > > > #include <linux/usb/ehci_pdriver.h>
> > > >
> > > > #include <platform.h>
> > > > #include <loongson1.h>
> > > > #include <dma.h>
> > > > #include <nand.h>
> > > > -
> > > > -/* Synopsys Ethernet GMAC */
> > > > -static struct stmmac_mdio_bus_data ls1x_mdio_bus_data = {
> > > > - .phy_mask = 0,
> > > > -};
> > > > -
> > > > -static struct stmmac_dma_cfg ls1x_eth_dma_cfg = {
> > > > - .pbl = 1,
> > > > -};
> > > > -
> > > > -int ls1x_eth_mux_init(struct platform_device *pdev, void *priv)
> > > > -{
> > > > - struct plat_stmmacenet_data *plat_dat = NULL;
> > > > - u32 val;
> > > > -
> > > > - val = __raw_readl(LS1X_MUX_CTRL1);
> > > > -
> > > > -#if defined(CONFIG_LOONGSON1_LS1B)
> > > > - plat_dat = dev_get_platdata(&pdev->dev);
> > > > - if (plat_dat->bus_id) {
> > > > - __raw_writel(__raw_readl(LS1X_MUX_CTRL0) | GMAC1_USE_UART1 |
> > > > - GMAC1_USE_UART0, LS1X_MUX_CTRL0);
> > > > - switch (plat_dat->phy_interface) {
> > > > - case PHY_INTERFACE_MODE_RGMII:
> > > > - val &= ~(GMAC1_USE_TXCLK | GMAC1_USE_PWM23);
> > > > - break;
> > > > - case PHY_INTERFACE_MODE_MII:
> > > > - val |= (GMAC1_USE_TXCLK | GMAC1_USE_PWM23);
> > > > - break;
> > > > - default:
> > > > - pr_err("unsupported mii mode %d\n",
> > > > - plat_dat->phy_interface);
> > > > - return -ENOTSUPP;
> > > > - }
> > > > - val &= ~GMAC1_SHUT;
> > > > - } else {
> > > > - switch (plat_dat->phy_interface) {
> > > > - case PHY_INTERFACE_MODE_RGMII:
> > > > - val &= ~(GMAC0_USE_TXCLK | GMAC0_USE_PWM01);
> > > > - break;
> > > > - case PHY_INTERFACE_MODE_MII:
> > > > - val |= (GMAC0_USE_TXCLK | GMAC0_USE_PWM01);
> > > > - break;
> > > > - default:
> > > > - pr_err("unsupported mii mode %d\n",
> > > > - plat_dat->phy_interface);
> > > > - return -ENOTSUPP;
> > > > - }
> > > > - val &= ~GMAC0_SHUT;
> > > > - }
> > > > - __raw_writel(val, LS1X_MUX_CTRL1);
> > > > -#elif defined(CONFIG_LOONGSON1_LS1C)
> > > > - plat_dat = dev_get_platdata(&pdev->dev);
> > > > -
> > > > - val &= ~PHY_INTF_SELI;
> > > > - if (plat_dat->phy_interface == PHY_INTERFACE_MODE_RMII)
> > > > - val |= 0x4 << PHY_INTF_SELI_SHIFT;
> > > > - __raw_writel(val, LS1X_MUX_CTRL1);
> > > > -
> > > > - val = __raw_readl(LS1X_MUX_CTRL0);
> > > > - __raw_writel(val & (~GMAC_SHUT), LS1X_MUX_CTRL0);
> > > > -#endif
> > > > -
> > > > - return 0;
> > > > -}
> > > > -
> > > > -static struct plat_stmmacenet_data ls1x_eth0_pdata = {
> > > > - .bus_id = 0,
> > > > - .phy_addr = -1,
> > > > -#if defined(CONFIG_LOONGSON1_LS1B)
> > > > - .phy_interface = PHY_INTERFACE_MODE_MII,
> > > > -#elif defined(CONFIG_LOONGSON1_LS1C)
> > > > - .phy_interface = PHY_INTERFACE_MODE_RMII,
> > > > -#endif
> > > > - .mdio_bus_data = &ls1x_mdio_bus_data,
> > > > - .dma_cfg = &ls1x_eth_dma_cfg,
> > > > - .has_gmac = 1,
> > > > - .tx_coe = 1,
> > > > - .rx_queues_to_use = 1,
> > > > - .tx_queues_to_use = 1,
> > > > - .init = ls1x_eth_mux_init,
> > > > -};
> > > > -
> > > > -static struct resource ls1x_eth0_resources[] = {
> > > > - [0] = {
> > > > - .start = LS1X_GMAC0_BASE,
> > > > - .end = LS1X_GMAC0_BASE + SZ_64K - 1,
> > > > - .flags = IORESOURCE_MEM,
> > > > - },
> > > > - [1] = {
> > > > - .name = "macirq",
> > > > - .start = LS1X_GMAC0_IRQ,
> > > > - .flags = IORESOURCE_IRQ,
> > > > - },
> > > > -};
> > > > -
> > > > -struct platform_device ls1x_eth0_pdev = {
> > > > - .name = "stmmaceth",
> > > > - .id = 0,
> > > > - .num_resources = ARRAY_SIZE(ls1x_eth0_resources),
> > > > - .resource = ls1x_eth0_resources,
> > > > - .dev = {
> > > > - .platform_data = &ls1x_eth0_pdata,
> > > > - },
> > > > -};
> > > > -
> > > > -#ifdef CONFIG_LOONGSON1_LS1B
> > > > -static struct plat_stmmacenet_data ls1x_eth1_pdata = {
> > > > - .bus_id = 1,
> > > > - .phy_addr = -1,
> > > > - .phy_interface = PHY_INTERFACE_MODE_MII,
> > > > - .mdio_bus_data = &ls1x_mdio_bus_data,
> > > > - .dma_cfg = &ls1x_eth_dma_cfg,
> > > > - .has_gmac = 1,
> > > > - .tx_coe = 1,
> > > > - .rx_queues_to_use = 1,
> > > > - .tx_queues_to_use = 1,
> > > > - .init = ls1x_eth_mux_init,
> > > > -};
> > > > -
> > > > -static struct resource ls1x_eth1_resources[] = {
> > > > - [0] = {
> > > > - .start = LS1X_GMAC1_BASE,
> > > > - .end = LS1X_GMAC1_BASE + SZ_64K - 1,
> > > > - .flags = IORESOURCE_MEM,
> > > > - },
> > > > - [1] = {
> > > > - .name = "macirq",
> > > > - .start = LS1X_GMAC1_IRQ,
> > > > - .flags = IORESOURCE_IRQ,
> > > > - },
> > > > -};
> > > > -
> > > > -struct platform_device ls1x_eth1_pdev = {
> > > > - .name = "stmmaceth",
> > > > - .id = 1,
> > > > - .num_resources = ARRAY_SIZE(ls1x_eth1_resources),
> > > > - .resource = ls1x_eth1_resources,
> > > > - .dev = {
> > > > - .platform_data = &ls1x_eth1_pdata,
> > > > - },
> > > > -};
> > > > -#endif /* CONFIG_LOONGSON1_LS1B */
> > > > +#include <irq.h>
> > > >
> > > > /* GPIO */
> > > > static struct resource ls1x_gpio0_resources[] = {
> > > > diff --git a/arch/mips/loongson32/ls1b/board.c b/arch/mips/loongson32/ls1b/board.c
> > > > index e8290f200096..f23e4e5c96ee 100644
> > > > --- a/arch/mips/loongson32/ls1b/board.c
> > > > +++ b/arch/mips/loongson32/ls1b/board.c
> > > > @@ -34,8 +34,6 @@ static const struct gpio_led_platform_data ls1x_led_pdata __initconst = {
> > > > };
> > > >
> > > > static struct platform_device *ls1b_platform_devices[] __initdata = {
> > > > - &ls1x_eth0_pdev,
> > > > - &ls1x_eth1_pdev,
> > > > &ls1x_ehci_pdev,
> > > > &ls1x_gpio0_pdev,
> > > > &ls1x_gpio1_pdev,
> > > > diff --git a/arch/mips/loongson32/ls1c/board.c b/arch/mips/loongson32/ls1c/board.c
> > > > index a7096964fb30..29bc467fd149 100644
> > > > --- a/arch/mips/loongson32/ls1c/board.c
> > > > +++ b/arch/mips/loongson32/ls1c/board.c
> > > > @@ -6,7 +6,6 @@
> > > > #include <platform.h>
> > > >
> > > > static struct platform_device *ls1c_platform_devices[] __initdata = {
> > > > - &ls1x_eth0_pdev,
> > > > &ls1x_rtc_pdev,
> > > > &ls1x_wdt_pdev,
> > > > };
> > > > --
> > > > 2.39.2
> > > >
> >
> >
> >
> > --
> > Best regards,
> >
> > Keguang Zhang



--
Best regards,

Keguang Zhang