The rk3328 soc has two gmac controllers, one is gmac2io, the other is gmac2phy. We use the gmac2io rgmii interface for 1000M phy here.
Signed-off-by: David Wu david.wu@rock-chips.com ---
Changes in v3: - Add "set parent" for gmac2io - Add internal mac clk div_sel for gmac2io
Changes in v2: - New patch
drivers/clk/rockchip/clk_rk3328.c | 178 +++++++++++++++++++++++++++++++++ include/dt-bindings/clock/rk3328-cru.h | 6 +- 2 files changed, 181 insertions(+), 3 deletions(-)
diff --git a/drivers/clk/rockchip/clk_rk3328.c b/drivers/clk/rockchip/clk_rk3328.c index fa0c777..2ccc798 100644 --- a/drivers/clk/rockchip/clk_rk3328.c +++ b/drivers/clk/rockchip/clk_rk3328.c @@ -13,6 +13,7 @@ #include <asm/arch/clock.h> #include <asm/arch/cru_rk3328.h> #include <asm/arch/hardware.h> +#include <asm/arch/grf_rk3328.h> #include <asm/io.h> #include <dm/lists.h> #include <dt-bindings/clock/rk3328-cru.h> @@ -94,6 +95,14 @@ enum { PCLK_DBG_DIV_SHIFT = 0, PCLK_DBG_DIV_MASK = 0xF << PCLK_DBG_DIV_SHIFT,
+ /* CLKSEL_CON27 */ + GMAC2IO_PLL_SEL_SHIFT = 7, + GMAC2IO_PLL_SEL_MASK = 1 << GMAC2IO_PLL_SEL_SHIFT, + GMAC2IO_PLL_SEL_CPLL = 0, + GMAC2IO_PLL_SEL_GPLL = 1, + GMAC2IO_CLK_DIV_MASK = 0x1f, + GMAC2IO_CLK_DIV_SHIFT = 0, + /* CLKSEL_CON28 */ ACLK_PERIHP_PLL_SEL_CPLL = 0, ACLK_PERIHP_PLL_SEL_GPLL, @@ -393,6 +402,44 @@ static ulong rk3328_i2c_set_clk(struct rk3328_cru *cru, ulong clk_id, uint hz) return DIV_TO_RATE(GPLL_HZ, src_clk_div); }
+static ulong rk3328_gmac2io_set_clk(struct rk3328_cru *cru, ulong rate) +{ + struct rk3328_grf_regs *grf; + ulong ret; + + grf = syscon_get_first_range(ROCKCHIP_SYSCON_GRF); + + /* + * The RGMII CLK can be derived either from an external "clkin" + * or can be generated from internally by a divider from SCLK_MAC. + */ + if (readl(&grf->mac_con[1]) & BIT(10) && + readl(&grf->soc_con[4]) & BIT(14)) { + /* An external clock will always generate the right rate... */ + ret = rate; + } else { + u32 con = readl(&cru->clksel_con[27]); + ulong pll_rate; + u8 div; + + if ((con >> GMAC2IO_PLL_SEL_SHIFT) & GMAC2IO_PLL_SEL_GPLL) + pll_rate = GPLL_HZ; + else + pll_rate = CPLL_HZ; + + div = DIV_ROUND_UP(pll_rate, rate) - 1; + if (div <= 0x1f) + rk_clrsetreg(&cru->clksel_con[27], GMAC2IO_CLK_DIV_MASK, + div << GMAC2IO_CLK_DIV_SHIFT); + else + debug("Unsupported div for gmac:%d\n", div); + + return DIV_TO_RATE(pll_rate, div); + } + + return ret; +} + static ulong rk3328_mmc_get_clk(struct rk3328_cru *cru, uint clk_id) { u32 div, con, con_id; @@ -558,12 +605,48 @@ static ulong rk3328_clk_set_rate(struct clk *clk, ulong rate) case SCLK_I2C3: ret = rk3328_i2c_set_clk(priv->cru, clk->id, rate); break; + case SCLK_MAC2IO: + ret = rk3328_gmac2io_set_clk(priv->cru, rate); + break; case SCLK_PWM: ret = rk3328_pwm_set_clk(priv->cru, rate); break; case SCLK_SARADC: ret = rk3328_saradc_set_clk(priv->cru, rate); break; + case DCLK_LCDC: + case SCLK_PDM: + case SCLK_RTC32K: + case SCLK_UART0: + case SCLK_UART1: + case SCLK_UART2: + case SCLK_SDIO: + case SCLK_TSP: + case SCLK_WIFI: + case ACLK_BUS_PRE: + case HCLK_BUS_PRE: + case PCLK_BUS_PRE: + case ACLK_PERI_PRE: + case HCLK_PERI: + case PCLK_PERI: + case ACLK_VIO_PRE: + case HCLK_VIO_PRE: + case ACLK_RGA_PRE: + case SCLK_RGA: + case ACLK_VOP_PRE: + case ACLK_RKVDEC_PRE: + case ACLK_RKVENC: + case ACLK_VPU_PRE: + case SCLK_VDEC_CABAC: + case SCLK_VDEC_CORE: + case SCLK_VENC_CORE: + case SCLK_VENC_DSP: + case SCLK_EFUSE: + case PCLK_DDR: + case ACLK_GMAC: + case PCLK_GMAC: + case SCLK_USB3OTG_SUSPEND: + return 0; default: return -ENOENT; } @@ -571,9 +654,104 @@ static ulong rk3328_clk_set_rate(struct clk *clk, ulong rate) return ret; }
+static int rk3328_gmac2io_set_parent(struct clk *clk, struct clk *parent) +{ + struct rk3328_grf_regs *grf; + const char *clock_output_name; + int ret; + + grf = syscon_get_first_range(ROCKCHIP_SYSCON_GRF); + + /* + * If the requested parent is in the same clock-controller and the id + * is SCLK_MAC2IO_SRC ("clk_mac2io_src"), switch to the internal clock. + */ + if ((parent->dev == clk->dev) && (parent->id == SCLK_MAC2IO_SRC)) { + debug("%s: switching RGMII to SCLK_MAC2IO_SRC\n", __func__); + rk_clrreg(&grf->mac_con[1], BIT(10)); + return 0; + } + + /* + * Otherwise, we need to check the clock-output-names of the + * requested parent to see if the requested id is "gmac_clkin". + */ + ret = dev_read_string_index(parent->dev, "clock-output-names", + parent->id, &clock_output_name); + if (ret < 0) + return -ENODATA; + + /* If this is "gmac_clkin", switch to the external clock input */ + if (!strcmp(clock_output_name, "gmac_clkin")) { + debug("%s: switching RGMII to CLKIN\n", __func__); + rk_setreg(&grf->mac_con[1], BIT(10)); + return 0; + } + + return -EINVAL; +} + +static int rk3328_gmac2io_ext_set_parent(struct clk *clk, struct clk *parent) +{ + struct rk3328_grf_regs *grf; + const char *clock_output_name; + int ret; + + grf = syscon_get_first_range(ROCKCHIP_SYSCON_GRF); + + /* + * If the requested parent is in the same clock-controller and the id + * is SCLK_MAC2IO ("clk_mac2io"), switch to the internal clock. + */ + if ((parent->dev == clk->dev) && (parent->id == SCLK_MAC2IO)) { + debug("%s: switching RGMII to SCLK_MAC2IO\n", __func__); + rk_clrreg(&grf->soc_con[4], BIT(14)); + return 0; + } + + /* + * Otherwise, we need to check the clock-output-names of the + * requested parent to see if the requested id is "gmac_clkin". + */ + ret = dev_read_string_index(parent->dev, "clock-output-names", + parent->id, &clock_output_name); + if (ret < 0) + return -ENODATA; + + /* If this is "gmac_clkin", switch to the external clock input */ + if (!strcmp(clock_output_name, "gmac_clkin")) { + debug("%s: switching RGMII to CLKIN\n", __func__); + rk_setreg(&grf->soc_con[4], BIT(14)); + return 0; + } + + return -EINVAL; +} + +static int rk3328_clk_set_parent(struct clk *clk, struct clk *parent) +{ + switch (clk->id) { + case SCLK_MAC2IO: + return rk3328_gmac2io_set_parent(clk, parent); + case SCLK_MAC2IO_EXT: + return rk3328_gmac2io_ext_set_parent(clk, parent); + case DCLK_LCDC: + case SCLK_PDM: + case SCLK_RTC32K: + case SCLK_UART0: + case SCLK_UART1: + case SCLK_UART2: + return 0; + } + + debug("%s: unsupported clk %ld\n", __func__, clk->id); + return -ENOENT; +} + static struct clk_ops rk3328_clk_ops = { .get_rate = rk3328_clk_get_rate, .set_rate = rk3328_clk_set_rate, + .set_parent = rk3328_clk_set_parent, };
static int rk3328_clk_probe(struct udevice *dev) diff --git a/include/dt-bindings/clock/rk3328-cru.h b/include/dt-bindings/clock/rk3328-cru.h index 6d8bf13..cdc0b33 100644 --- a/include/dt-bindings/clock/rk3328-cru.h +++ b/include/dt-bindings/clock/rk3328-cru.h @@ -86,6 +86,9 @@ #define SCLK_USB3OTG_SUSPEND 97 #define SCLK_REF_USB3OTG_SRC 98 #define SCLK_MAC2IO_SRC 99 +#define SCLK_MAC2IO 100 +#define SCLK_MAC2PHY 101 +#define SCLK_MAC2IO_EXT 102
/* dclk gates */ #define DCLK_LCDC 180 @@ -199,9 +202,6 @@
#define CLK_NR_CLKS (HCLK_HDCP + 1)
-#define SCLK_MAC2IO 0 -#define SCLK_MAC2PHY 1 - #define CLKGRF_NR_CLKS (SCLK_MAC2PHY + 1)
/* soft-reset indices */