diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/clk/Kconfig | 1 | ||||
| -rw-r--r-- | drivers/clk/Makefile | 1 | ||||
| -rw-r--r-- | drivers/clk/starfive/Kconfig | 9 | ||||
| -rw-r--r-- | drivers/clk/starfive/Makefile | 3 | ||||
| -rw-r--r-- | drivers/clk/starfive/clk-starfive-jh7100.c | 689 | ||||
| -rw-r--r-- | drivers/pinctrl/Kconfig | 17 | ||||
| -rw-r--r-- | drivers/pinctrl/Makefile | 1 | ||||
| -rw-r--r-- | drivers/pinctrl/pinctrl-starfive.c | 1354 | ||||
| -rw-r--r-- | drivers/reset/Kconfig | 7 | ||||
| -rw-r--r-- | drivers/reset/Makefile | 1 | ||||
| -rw-r--r-- | drivers/reset/reset-starfive-jh7100.c | 173 | ||||
| -rw-r--r-- | drivers/tty/serial/8250/8250_dw.c | 3 |
12 files changed, 2259 insertions, 0 deletions
diff --git a/drivers/clk/Kconfig b/drivers/clk/Kconfig index c5b3dc97396a..c91931c94888 100644 --- a/drivers/clk/Kconfig +++ b/drivers/clk/Kconfig @@ -412,6 +412,7 @@ source "drivers/clk/samsung/Kconfig" source "drivers/clk/sifive/Kconfig" source "drivers/clk/socfpga/Kconfig" source "drivers/clk/sprd/Kconfig" +source "drivers/clk/starfive/Kconfig" source "drivers/clk/sunxi/Kconfig" source "drivers/clk/sunxi-ng/Kconfig" source "drivers/clk/tegra/Kconfig" diff --git a/drivers/clk/Makefile b/drivers/clk/Makefile index e42312121e51..a9bb2478fbdd 100644 --- a/drivers/clk/Makefile +++ b/drivers/clk/Makefile @@ -109,6 +109,7 @@ obj-y += socfpga/ obj-$(CONFIG_PLAT_SPEAR) += spear/ obj-y += sprd/ obj-$(CONFIG_ARCH_STI) += st/ +obj-$(CONFIG_SOC_STARFIVE) += starfive/ obj-$(CONFIG_ARCH_SUNXI) += sunxi/ obj-$(CONFIG_SUNXI_CCU) += sunxi-ng/ obj-$(CONFIG_ARCH_TEGRA) += tegra/ diff --git a/drivers/clk/starfive/Kconfig b/drivers/clk/starfive/Kconfig new file mode 100644 index 000000000000..c0fa9d5e641f --- /dev/null +++ b/drivers/clk/starfive/Kconfig @@ -0,0 +1,9 @@ +# SPDX-License-Identifier: GPL-2.0 + +config CLK_STARFIVE_JH7100 + bool "StarFive JH7100 clock support" + depends on SOC_STARFIVE || COMPILE_TEST + default SOC_STARFIVE + help + Say yes here to support the clock controller on the StarFive JH7100 + SoC. diff --git a/drivers/clk/starfive/Makefile b/drivers/clk/starfive/Makefile new file mode 100644 index 000000000000..09759cc73530 --- /dev/null +++ b/drivers/clk/starfive/Makefile @@ -0,0 +1,3 @@ +# SPDX-License-Identifier: GPL-2.0 +# StarFive Clock +obj-$(CONFIG_CLK_STARFIVE_JH7100) += clk-starfive-jh7100.o diff --git a/drivers/clk/starfive/clk-starfive-jh7100.c b/drivers/clk/starfive/clk-starfive-jh7100.c new file mode 100644 index 000000000000..25d31afa0f87 --- /dev/null +++ b/drivers/clk/starfive/clk-starfive-jh7100.c @@ -0,0 +1,689 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * StarFive JH7100 Clock Generator Driver + * + * Copyright 2021 Ahmad Fatoum, Pengutronix + * Copyright (C) 2021 Glider bv + * Copyright (C) 2021 Emil Renner Berthing <kernel@esmil.dk> + */ + +#include <linux/bits.h> +#include <linux/clk-provider.h> +#include <linux/debugfs.h> +#include <linux/device.h> +#include <linux/init.h> +#include <linux/io.h> +#include <linux/kernel.h> +#include <linux/mod_devicetable.h> +#include <linux/module.h> +#include <linux/platform_device.h> + +#include <dt-bindings/clock/starfive-jh7100.h> + +/* external clocks */ +#define JH7100_CLK_OSC_SYS (JH7100_CLK_END + 0) +#define JH7100_CLK_OSC_AUD (JH7100_CLK_END + 1) +#define JH7100_CLK_GMAC_RMII_REF (JH7100_CLK_END + 2) +#define JH7100_CLK_GMAC_GR_MII_RX (JH7100_CLK_END + 3) + +/* register fields */ +#define JH7100_CLK_ENABLE BIT(31) +#define JH7100_CLK_INVERT BIT(30) +#define JH7100_CLK_MUX_MASK GENMASK(27, 24) +#define JH7100_CLK_MUX_SHIFT 24 +#define JH7100_CLK_DIV_MASK GENMASK(23, 0) + +/* clock data */ +#define JH7100_GATE(_idx, _name, _flags, _parent) [_idx] = { \ + .name = _name, \ + .flags = CLK_SET_RATE_PARENT | (_flags), \ + .max = JH7100_CLK_ENABLE, \ + .parents = { [0] = _parent }, \ +} + +#define JH7100__DIV(_idx, _name, _max, _parent) [_idx] = { \ + .name = _name, \ + .flags = 0, \ + .max = _max, \ + .parents = { [0] = _parent }, \ +} + +#define JH7100_GDIV(_idx, _name, _flags, _max, _parent) [_idx] = { \ + .name = _name, \ + .flags = _flags, \ + .max = JH7100_CLK_ENABLE | (_max), \ + .parents = { [0] = _parent }, \ +} + +#define JH7100__MUX(_idx, _name, _nparents, ...) [_idx] = { \ + .name = _name, \ + .flags = 0, \ + .max = ((_nparents) - 1) << JH7100_CLK_MUX_SHIFT, \ + .parents = { __VA_ARGS__ }, \ +} + +#define JH7100_GMUX(_idx, _name, _flags, _nparents, ...) [_idx] = { \ + .name = _name, \ + .flags = _flags, \ + .max = JH7100_CLK_ENABLE | \ + (((_nparents) - 1) << JH7100_CLK_MUX_SHIFT), \ + .parents = { __VA_ARGS__ }, \ +} + +#define JH7100__INV(_idx, _name, _parent) [_idx] = { \ + .name = _name, \ + .flags = CLK_SET_RATE_PARENT, \ + .max = JH7100_CLK_INVERT, \ + .parents = { [0] = _parent }, \ +} + +static const struct { + const char *name; + unsigned long flags; + u32 max; + u8 parents[4]; +} jh7100_clk_data[] __initconst = { + JH7100__MUX(JH7100_CLK_CPUNDBUS_ROOT, "cpundbus_root", 4, + JH7100_CLK_OSC_SYS, + JH7100_CLK_PLL0_OUT, + JH7100_CLK_PLL1_OUT, + JH7100_CLK_PLL2_OUT), + JH7100__MUX(JH7100_CLK_DLA_ROOT, "dla_root", 3, + JH7100_CLK_OSC_SYS, + JH7100_CLK_PLL1_OUT, + JH7100_CLK_PLL2_OUT), + JH7100__MUX(JH7100_CLK_DSP_ROOT, "dsp_root", 4, + JH7100_CLK_OSC_SYS, + JH7100_CLK_PLL0_OUT, + JH7100_CLK_PLL1_OUT, + JH7100_CLK_PLL2_OUT), + JH7100__MUX(JH7100_CLK_GMACUSB_ROOT, "gmacusb_root", 3, + JH7100_CLK_OSC_SYS, + JH7100_CLK_PLL0_OUT, + JH7100_CLK_PLL2_OUT), + JH7100__MUX(JH7100_CLK_PERH0_ROOT, "perh0_root", 2, + JH7100_CLK_OSC_SYS, + JH7100_CLK_PLL0_OUT), + JH7100__MUX(JH7100_CLK_PERH1_ROOT, "perh1_root", 2, + JH7100_CLK_OSC_SYS, + JH7100_CLK_PLL2_OUT), + JH7100__MUX(JH7100_CLK_VIN_ROOT, "vin_root", 3, + JH7100_CLK_OSC_SYS, + JH7100_CLK_PLL1_OUT, + JH7100_CLK_PLL2_OUT), + JH7100__MUX(JH7100_CLK_VOUT_ROOT, "vout_root", 3, + JH7100_CLK_OSC_AUD, + JH7100_CLK_PLL0_OUT, + JH7100_CLK_PLL2_OUT), + JH7100_GDIV(JH7100_CLK_AUDIO_ROOT, "audio_root", 0, 8, JH7100_CLK_PLL0_OUT), + JH7100__MUX(JH7100_CLK_CDECHIFI4_ROOT, "cdechifi4_root", 3, + JH7100_CLK_OSC_SYS, + JH7100_CLK_PLL1_OUT, + JH7100_CLK_PLL2_OUT), + JH7100__MUX(JH7100_CLK_CDEC_ROOT, "cdec_root", 3, + JH7100_CLK_OSC_SYS, + JH7100_CLK_PLL0_OUT, + JH7100_CLK_PLL1_OUT), + JH7100__MUX(JH7100_CLK_VOUTBUS_ROOT, "voutbus_root", 3, + JH7100_CLK_OSC_AUD, + JH7100_CLK_PLL0_OUT, + JH7100_CLK_PLL2_OUT), + JH7100__DIV(JH7100_CLK_CPUNBUS_ROOT_DIV, "cpunbus_root_div", 2, JH7100_CLK_CPUNDBUS_ROOT), + JH7100__DIV(JH7100_CLK_DSP_ROOT_DIV, "dsp_root_div", 4, JH7100_CLK_DSP_ROOT), + JH7100__DIV(JH7100_CLK_PERH0_SRC, "perh0_src", 4, JH7100_CLK_PERH0_ROOT), + JH7100__DIV(JH7100_CLK_PERH1_SRC, "perh1_src", 4, JH7100_CLK_PERH1_ROOT), + JH7100_GDIV(JH7100_CLK_PLL0_TESTOUT, "pll0_testout", 0, 31, JH7100_CLK_PERH0_SRC), + JH7100_GDIV(JH7100_CLK_PLL1_TESTOUT, "pll1_testout", 0, 31, JH7100_CLK_DLA_ROOT), + JH7100_GDIV(JH7100_CLK_PLL2_TESTOUT, "pll2_testout", 0, 31, JH7100_CLK_PERH1_SRC), + JH7100__MUX(JH7100_CLK_PLL2_REF, "pll2_refclk", 2, + JH7100_CLK_OSC_SYS, + JH7100_CLK_OSC_AUD), + JH7100__DIV(JH7100_CLK_CPU_CORE, "cpu_core", 8, JH7100_CLK_CPUNBUS_ROOT_DIV), + JH7100__DIV(JH7100_CLK_CPU_AXI, "cpu_axi", 8, JH7100_CLK_CPU_CORE), + JH7100__DIV(JH7100_CLK_AHB_BUS, "ahb_bus", 8, JH7100_CLK_CPUNBUS_ROOT_DIV), + JH7100__DIV(JH7100_CLK_APB1_BUS, "apb1_bus", 8, JH7100_CLK_AHB_BUS), + JH7100__DIV(JH7100_CLK_APB2_BUS, "apb2_bus", 8, JH7100_CLK_AHB_BUS), + JH7100_GATE(JH7100_CLK_DOM3AHB_BUS, "dom3ahb_bus", CLK_IS_CRITICAL, JH7100_CLK_AHB_BUS), + JH7100_GATE(JH7100_CLK_DOM7AHB_BUS, "dom7ahb_bus", CLK_IS_CRITICAL, JH7100_CLK_AHB_BUS), + JH7100_GATE(JH7100_CLK_U74_CORE0, "u74_core0", CLK_IS_CRITICAL, JH7100_CLK_CPU_CORE), + JH7100_GDIV(JH7100_CLK_U74_CORE1, "u74_core1", CLK_IS_CRITICAL, 8, JH7100_CLK_CPU_CORE), + JH7100_GATE(JH7100_CLK_U74_AXI, "u74_axi", CLK_IS_CRITICAL, JH7100_CLK_CPU_AXI), + JH7100_GATE(JH7100_CLK_U74RTC_TOGGLE, "u74rtc_toggle", CLK_IS_CRITICAL, JH7100_CLK_OSC_SYS), + JH7100_GATE(JH7100_CLK_SGDMA2P_AXI, "sgdma2p_axi", 0, JH7100_CLK_CPU_AXI), + JH7100_GATE(JH7100_CLK_DMA2PNOC_AXI, "dma2pnoc_axi", 0, JH7100_CLK_CPU_AXI), + JH7100_GATE(JH7100_CLK_SGDMA2P_AHB, "sgdma2p_ahb", 0, JH7100_CLK_AHB_BUS), + JH7100__DIV(JH7100_CLK_DLA_BUS, "dla_bus", 4, JH7100_CLK_DLA_ROOT), + JH7100_GATE(JH7100_CLK_DLA_AXI, "dla_axi", 0, JH7100_CLK_DLA_BUS), + JH7100_GATE(JH7100_CLK_DLANOC_AXI, "dlanoc_axi", 0, JH7100_CLK_DLA_BUS), + JH7100_GATE(JH7100_CLK_DLA_APB, "dla_apb", 0, JH7100_CLK_APB1_BUS), + JH7100_GDIV(JH7100_CLK_VP6_CORE, "vp6_core", 0, 4, JH7100_CLK_DSP_ROOT_DIV), + JH7100__DIV(JH7100_CLK_VP6BUS_SRC, "vp6bus_src", 4, JH7100_CLK_DSP_ROOT), + JH7100_GDIV(JH7100_CLK_VP6_AXI, "vp6_axi", 0, 4, JH7100_CLK_VP6BUS_SRC), + JH7100__DIV(JH7100_CLK_VCDECBUS_SRC, "vcdecbus_src", 4, JH7100_CLK_CDECHIFI4_ROOT), + JH7100__DIV(JH7100_CLK_VDEC_BUS, "vdec_bus", 8, JH7100_CLK_VCDECBUS_SRC), + JH7100_GATE(JH7100_CLK_VDEC_AXI, "vdec_axi", 0, JH7100_CLK_VDEC_BUS), + JH7100_GATE(JH7100_CLK_VDECBRG_MAIN, "vdecbrg_mainclk", 0, JH7100_CLK_VDEC_BUS), + JH7100_GDIV(JH7100_CLK_VDEC_BCLK, "vdec_bclk", 0, 8, JH7100_CLK_VCDECBUS_SRC), + JH7100_GDIV(JH7100_CLK_VDEC_CCLK, "vdec_cclk", 0, 8, JH7100_CLK_CDEC_ROOT), + JH7100_GATE(JH7100_CLK_VDEC_APB, "vdec_apb", 0, JH7100_CLK_APB1_BUS), + JH7100_GDIV(JH7100_CLK_JPEG_AXI, "jpeg_axi", 0, 8, JH7100_CLK_CPUNBUS_ROOT_DIV), + JH7100_GDIV(JH7100_CLK_JPEG_CCLK, "jpeg_cclk", 0, 8, JH7100_CLK_CPUNBUS_ROOT_DIV), + JH7100_GATE(JH7100_CLK_JPEG_APB, "jpeg_apb", 0, JH7100_CLK_APB1_BUS), + JH7100_GDIV(JH7100_CLK_GC300_2X, "gc300_2x", 0, 8, JH7100_CLK_CDECHIFI4_ROOT), + JH7100_GATE(JH7100_CLK_GC300_AHB, "gc300_ahb", 0, JH7100_CLK_AHB_BUS), + JH7100__DIV(JH7100_CLK_JPCGC300_AXIBUS, "jpcgc300_axibus", 8, JH7100_CLK_VCDECBUS_SRC), + JH7100_GATE(JH7100_CLK_GC300_AXI, "gc300_axi", 0, JH7100_CLK_JPCGC300_AXIBUS), + JH7100_GATE(JH7100_CLK_JPCGC300_MAIN, "jpcgc300_mainclk", 0, JH7100_CLK_JPCGC300_AXIBUS), + JH7100__DIV(JH7100_CLK_VENC_BUS, "venc_bus", 8, JH7100_CLK_VCDECBUS_SRC), + JH7100_GATE(JH7100_CLK_VENC_AXI, "venc_axi", 0, JH7100_CLK_VENC_BUS), + JH7100_GATE(JH7100_CLK_VENCBRG_MAIN, "vencbrg_mainclk", 0, JH7100_CLK_VENC_BUS), + JH7100_GDIV(JH7100_CLK_VENC_BCLK, "venc_bclk", 0, 8, JH7100_CLK_VCDECBUS_SRC), + JH7100_GDIV(JH7100_CLK_VENC_CCLK, "venc_cclk", 0, 8, JH7100_CLK_CDEC_ROOT), + JH7100_GATE(JH7100_CLK_VENC_APB, "venc_apb", 0, JH7100_CLK_APB1_BUS), + JH7100_GDIV(JH7100_CLK_DDRPLL_DIV2, "ddrpll_div2", CLK_IS_CRITICAL, 2, JH7100_CLK_PLL1_OUT), + JH7100_GDIV(JH7100_CLK_DDRPLL_DIV4, "ddrpll_div4", CLK_IS_CRITICAL, 2, JH7100_CLK_DDRPLL_DIV2), + JH7100_GDIV(JH7100_CLK_DDRPLL_DIV8, "ddrpll_div8", CLK_IS_CRITICAL, 2, JH7100_CLK_DDRPLL_DIV4), + JH7100_GDIV(JH7100_CLK_DDROSC_DIV2, "ddrosc_div2", CLK_IS_CRITICAL, 2, JH7100_CLK_OSC_SYS), + JH7100_GMUX(JH7100_CLK_DDRC0, "ddrc0", CLK_IS_CRITICAL, 4, + JH7100_CLK_DDROSC_DIV2, + JH7100_CLK_DDRPLL_DIV2, + JH7100_CLK_DDRPLL_DIV4, + JH7100_CLK_DDRPLL_DIV8), + JH7100_GMUX(JH7100_CLK_DDRC1, "ddrc1", CLK_IS_CRITICAL, 4, + JH7100_CLK_DDROSC_DIV2, + JH7100_CLK_DDRPLL_DIV2, + JH7100_CLK_DDRPLL_DIV4, + JH7100_CLK_DDRPLL_DIV8), + JH7100_GATE(JH7100_CLK_DDRPHY_APB, "ddrphy_apb", 0, JH7100_CLK_APB1_BUS), + JH7100__DIV(JH7100_CLK_NOC_ROB, "noc_rob", 8, JH7100_CLK_CPUNBUS_ROOT_DIV), + JH7100__DIV(JH7100_CLK_NOC_COG, "noc_cog", 8, JH7100_CLK_DLA_ROOT), + JH7100_GATE(JH7100_CLK_NNE_AHB, "nne_ahb", 0, JH7100_CLK_AHB_BUS), + JH7100__DIV(JH7100_CLK_NNEBUS_SRC1, "nnebus_src1", 4, JH7100_CLK_DSP_ROOT), + JH7100__MUX(JH7100_CLK_NNE_BUS, "nne_bus", 2, + JH7100_CLK_CPU_AXI, + JH7100_CLK_NNEBUS_SRC1), + JH7100_GATE(JH7100_CLK_NNE_AXI, "nne_axi", 0, JH7100_CLK_NNE_BUS), + JH7100_GATE(JH7100_CLK_NNENOC_AXI, "nnenoc_axi", 0, JH7100_CLK_NNE_BUS), + JH7100_GATE(JH7100_CLK_DLASLV_AXI, "dlaslv_axi", 0, JH7100_CLK_NNE_BUS), + JH7100_GATE(JH7100_CLK_DSPX2C_AXI, "dspx2c_axi", CLK_IS_CRITICAL, JH7100_CLK_NNE_BUS), + JH7100__DIV(JH7100_CLK_HIFI4_SRC, "hifi4_src", 4, JH7100_CLK_CDECHIFI4_ROOT), + JH7100__DIV(JH7100_CLK_HIFI4_COREFREE, "hifi4_corefree", 8, JH7100_CLK_HIFI4_SRC), + JH7100_GATE(JH7100_CLK_HIFI4_CORE, "hifi4_core", 0, JH7100_CLK_HIFI4_COREFREE), + JH7100__DIV(JH7100_CLK_HIFI4_BUS, "hifi4_bus", 8, JH7100_CLK_HIFI4_COREFREE), + JH7100_GATE(JH7100_CLK_HIFI4_AXI, "hifi4_axi", 0, JH7100_CLK_HIFI4_BUS), + JH7100_GATE(JH7100_CLK_HIFI4NOC_AXI, "hifi4noc_axi", 0, JH7100_CLK_HIFI4_BUS), + JH7100__DIV(JH7100_CLK_SGDMA1P_BUS, "sgdma1p_bus", 8, JH7100_CLK_CPUNBUS_ROOT_DIV), + JH7100_GATE(JH7100_CLK_SGDMA1P_AXI, "sgdma1p_axi", 0, JH7100_CLK_SGDMA1P_BUS), + JH7100_GATE(JH7100_CLK_DMA1P_AXI, "dma1p_axi", 0, JH7100_CLK_SGDMA1P_BUS), + JH7100_GDIV(JH7100_CLK_X2C_AXI, "x2c_axi", CLK_IS_CRITICAL, 8, JH7100_CLK_CPUNBUS_ROOT_DIV), + JH7100__DIV(JH7100_CLK_USB_BUS, "usb_bus", 8, JH7100_CLK_CPUNBUS_ROOT_DIV), + JH7100_GATE(JH7100_CLK_USB_AXI, "usb_axi", 0, JH7100_CLK_USB_BUS), + JH7100_GATE(JH7100_CLK_USBNOC_AXI, "usbnoc_axi", 0, JH7100_CLK_USB_BUS), + JH7100__DIV(JH7100_CLK_USBPHY_ROOTDIV, "usbphy_rootdiv", 4, JH7100_CLK_GMACUSB_ROOT), + JH7100_GDIV(JH7100_CLK_USBPHY_125M, "usbphy_125m", 0, 8, JH7100_CLK_USBPHY_ROOTDIV), + JH7100_GDIV(JH7100_CLK_USBPHY_PLLDIV25M, "usbphy_plldiv25m", 0, 32, JH7100_CLK_USBPHY_ROOTDIV), + JH7100__MUX(JH7100_CLK_USBPHY_25M, "usbphy_25m", 2, + JH7100_CLK_OSC_SYS, + JH7100_CLK_USBPHY_PLLDIV25M), + JH7100__DIV(JH7100_CLK_AUDIO_DIV, "audio_div", 131072, JH7100_CLK_AUDIO_ROOT), + JH7100_GATE(JH7100_CLK_AUDIO_SRC, "audio_src", 0, JH7100_CLK_AUDIO_DIV), + JH7100_GATE(JH7100_CLK_AUDIO_12288, "audio_12288", 0, JH7100_CLK_OSC_AUD), + JH7100_GDIV(JH7100_CLK_VIN_SRC, "vin_src", 0, 4, JH7100_CLK_VIN_ROOT), + JH7100__DIV(JH7100_CLK_ISP0_BUS, "isp0_bus", 8, JH7100_CLK_VIN_SRC), + JH7100_GATE(JH7100_CLK_ISP0_AXI, "isp0_axi", 0, JH7100_CLK_ISP0_BUS), + JH7100_GATE(JH7100_CLK_ISP0NOC_AXI, "isp0noc_axi", 0, JH7100_CLK_ISP0_BUS), + JH7100_GATE(JH7100_CLK_ISPSLV_AXI, "ispslv_axi", 0, JH7100_CLK_ISP0_BUS), + JH7100__DIV(JH7100_CLK_ISP1_BUS, "isp1_bus", 8, JH7100_CLK_VIN_SRC), + JH7100_GATE(JH7100_CLK_ISP1_AXI, "isp1_axi", 0, JH7100_CLK_ISP1_BUS), + JH7100_GATE(JH7100_CLK_ISP1NOC_AXI, "isp1noc_axi", 0, JH7100_CLK_ISP1_BUS), + JH7100__DIV(JH7100_CLK_VIN_BUS, "vin_bus", 8, JH7100_CLK_VIN_SRC), + JH7100_GATE(JH7100_CLK_VIN_AXI, "vin_axi", 0, JH7100_CLK_VIN_BUS), + JH7100_GATE(JH7100_CLK_VINNOC_AXI, "vinnoc_axi", 0, JH7100_CLK_VIN_BUS), + JH7100_GDIV(JH7100_CLK_VOUT_SRC, "vout_src", 0, 4, JH7100_CLK_VOUT_ROOT), + JH7100__DIV(JH7100_CLK_DISPBUS_SRC, "dispbus_src", 4, JH7100_CLK_VOUTBUS_ROOT), + JH7100__DIV(JH7100_CLK_DISP_BUS, "disp_bus", 4, JH7100_CLK_DISPBUS_SRC), + JH7100_GATE(JH7100_CLK_DISP_AXI, "disp_axi", 0, JH7100_CLK_DISP_BUS), + JH7100_GATE(JH7100_CLK_DISPNOC_AXI, "dispnoc_axi", 0, JH7100_CLK_DISP_BUS), + JH7100_GATE(JH7100_CLK_SDIO0_AHB, "sdio0_ahb", 0, JH7100_CLK_AHB_BUS), + JH7100_GDIV(JH7100_CLK_SDIO0_CCLKINT, "sdio0_cclkint", 0, 24, JH7100_CLK_PERH0_SRC), + JH7100__INV(JH7100_CLK_SDIO0_CCLKINT_INV, "sdio0_cclkint_inv", JH7100_CLK_SDIO0_CCLKINT), + JH7100_GATE(JH7100_CLK_SDIO1_AHB, "sdio1_ahb", 0, JH7100_CLK_AHB_BUS), + JH7100_GDIV(JH7100_CLK_SDIO1_CCLKINT, "sdio1_cclkint", 0, 24, JH7100_CLK_PERH1_SRC), + JH7100__INV(JH7100_CLK_SDIO1_CCLKINT_INV, "sdio1_cclkint_inv", JH7100_CLK_SDIO1_CCLKINT), + JH7100_GATE(JH7100_CLK_GMAC_AHB, "gmac_ahb", 0, JH7100_CLK_AHB_BUS), + JH7100__DIV(JH7100_CLK_GMAC_ROOT_DIV, "gmac_root_div", 8, JH7100_CLK_GMACUSB_ROOT), + JH7100_GDIV(JH7100_CLK_GMAC_PTP_REF, "gmac_ptp_refclk", 0, 31, JH7100_CLK_GMAC_ROOT_DIV), + JH7100_GDIV(JH7100_CLK_GMAC_GTX, "gmac_gtxclk", 0, 255, JH7100_CLK_GMAC_ROOT_DIV), + JH7100_GDIV(JH7100_CLK_GMAC_RMII_TX, "gmac_rmii_txclk", 0, 8, JH7100_CLK_GMAC_RMII_REF), + JH7100_GDIV(JH7100_CLK_GMAC_RMII_RX, "gmac_rmii_rxclk", 0, 8, JH7100_CLK_GMAC_RMII_REF), + JH7100__MUX(JH7100_CLK_GMAC_TX, "gmac_tx", 3, + JH7100_CLK_GMAC_GTX, + JH7100_CLK_GMAC_TX_INV, + JH7100_CLK_GMAC_RMII_TX), + JH7100__INV(JH7100_CLK_GMAC_TX_INV, "gmac_tx_inv", JH7100_CLK_GMAC_TX), + JH7100__MUX(JH7100_CLK_GMAC_RX_PRE, "gmac_rx_pre", 2, + JH7100_CLK_GMAC_GR_MII_RX, + JH7100_CLK_GMAC_RMII_RX), + JH7100__INV(JH7100_CLK_GMAC_RX_INV, "gmac_rx_inv", JH7100_CLK_GMAC_RX_PRE), + JH7100_GATE(JH7100_CLK_GMAC_RMII, "gmac_rmii", 0, JH7100_CLK_GMAC_RMII_REF), + JH7100_GDIV(JH7100_CLK_GMAC_TOPHYREF, "gmac_tophyref", 0, 127, JH7100_CLK_GMAC_ROOT_DIV), + JH7100_GATE(JH7100_CLK_SPI2AHB_AHB, "spi2ahb_ahb", 0, JH7100_CLK_AHB_BUS), + JH7100_GDIV(JH7100_CLK_SPI2AHB_CORE, "spi2ahb_core", 0, 31, JH7100_CLK_PERH0_SRC), + JH7100_GATE(JH7100_CLK_EZMASTER_AHB, "ezmaster_ahb", 0, JH7100_CLK_AHB_BUS), + JH7100_GATE(JH7100_CLK_E24_AHB, "e24_ahb", 0, JH7100_CLK_AHB_BUS), + JH7100_GATE(JH7100_CLK_E24RTC_TOGGLE, "e24rtc_toggle", 0, JH7100_CLK_OSC_SYS), + JH7100_GATE(JH7100_CLK_QSPI_AHB, "qspi_ahb", 0, JH7100_CLK_AHB_BUS), + JH7100_GATE(JH7100_CLK_QSPI_APB, "qspi_apb", 0, JH7100_CLK_APB1_BUS), + JH7100_GDIV(JH7100_CLK_QSPI_REF, "qspi_refclk", 0, 31, JH7100_CLK_PERH0_SRC), + JH7100_GATE(JH7100_CLK_SEC_AHB, "sec_ahb", 0, JH7100_CLK_AHB_BUS), + JH7100_GATE(JH7100_CLK_AES, "aes_clk", 0, JH7100_CLK_SEC_AHB), + JH7100_GATE(JH7100_CLK_SHA, "sha_clk", 0, JH7100_CLK_SEC_AHB), + JH7100_GATE(JH7100_CLK_PKA, "pka_clk", 0, JH7100_CLK_SEC_AHB), + JH7100_GATE(JH7100_CLK_TRNG_APB, "trng_apb", 0, JH7100_CLK_APB1_BUS), + JH7100_GATE(JH7100_CLK_OTP_APB, "otp_apb", 0, JH7100_CLK_APB1_BUS), + JH7100_GATE(JH7100_CLK_UART0_APB, "uart0_apb", 0, JH7100_CLK_APB1_BUS), + JH7100_GDIV(JH7100_CLK_UART0_CORE, "uart0_core", 0, 63, JH7100_CLK_PERH1_SRC), + JH7100_GATE(JH7100_CLK_UART1_APB, "uart1_apb", 0, JH7100_CLK_APB1_BUS), + JH7100_GDIV(JH7100_CLK_UART1_CORE, "uart1_core", 0, 63, JH7100_CLK_PERH1_SRC), + JH7100_GATE(JH7100_CLK_SPI0_APB, "spi0_apb", 0, JH7100_CLK_APB1_BUS), + JH7100_GDIV(JH7100_CLK_SPI0_CORE, "spi0_core", 0, 63, JH7100_CLK_PERH1_SRC), + JH7100_GATE(JH7100_CLK_SPI1_APB, "spi1_apb", 0, JH7100_CLK_APB1_BUS), + JH7100_GDIV(JH7100_CLK_SPI1_CORE, "spi1_core", 0, 63, JH7100_CLK_PERH1_SRC), + JH7100_GATE(JH7100_CLK_I2C0_APB, "i2c0_apb", 0, JH7100_CLK_APB1_BUS), + JH7100_GDIV(JH7100_CLK_I2C0_CORE, "i2c0_core", 0, 63, JH7100_CLK_PERH1_SRC), + JH7100_GATE(JH7100_CLK_I2C1_APB, "i2c1_apb", 0, JH7100_CLK_APB1_BUS), + JH7100_GDIV(JH7100_CLK_I2C1_CORE, "i2c1_core", 0, 63, JH7100_CLK_PERH1_SRC), + JH7100_GATE(JH7100_CLK_GPIO_APB, "gpio_apb", 0, JH7100_CLK_APB1_BUS), + JH7100_GATE(JH7100_CLK_UART2_APB, "uart2_apb", 0, JH7100_CLK_APB2_BUS), + JH7100_GDIV(JH7100_CLK_UART2_CORE, "uart2_core", 0, 63, JH7100_CLK_PERH0_SRC), + JH7100_GATE(JH7100_CLK_UART3_APB, "uart3_apb", 0, JH7100_CLK_APB2_BUS), + JH7100_GDIV(JH7100_CLK_UART3_CORE, "uart3_core", 0, 63, JH7100_CLK_PERH0_SRC), + JH7100_GATE(JH7100_CLK_SPI2_APB, "spi2_apb", 0, JH7100_CLK_APB2_BUS), + JH7100_GDIV(JH7100_CLK_SPI2_CORE, "spi2_core", 0, 63, JH7100_CLK_PERH0_SRC), + JH7100_GATE(JH7100_CLK_SPI3_APB, "spi3_apb", 0, JH7100_CLK_APB2_BUS), + JH7100_GDIV(JH7100_CLK_SPI3_CORE, "spi3_core", 0, 63, JH7100_CLK_PERH0_SRC), + JH7100_GATE(JH7100_CLK_I2C2_APB, "i2c2_apb", 0, JH7100_CLK_APB2_BUS), + JH7100_GDIV(JH7100_CLK_I2C2_CORE, "i2c2_core", 0, 63, JH7100_CLK_PERH0_SRC), + JH7100_GATE(JH7100_CLK_I2C3_APB, "i2c3_apb", 0, JH7100_CLK_APB2_BUS), + JH7100_GDIV(JH7100_CLK_I2C3_CORE, "i2c3_core", 0, 63, JH7100_CLK_PERH0_SRC), + JH7100_GATE(JH7100_CLK_WDTIMER_APB, "wdtimer_apb", 0, JH7100_CLK_APB2_BUS), + JH7100_GDIV(JH7100_CLK_WDT_CORE, "wdt_coreclk", 0, 63, JH7100_CLK_PERH0_SRC), + JH7100_GDIV(JH7100_CLK_TIMER0_CORE, "timer0_coreclk", 0, 63, JH7100_CLK_PERH0_SRC), + JH7100_GDIV(JH7100_CLK_TIMER1_CORE, "timer1_coreclk", 0, 63, JH7100_CLK_PERH0_SRC), + JH7100_GDIV(JH7100_CLK_TIMER2_CORE, "timer2_coreclk", 0, 63, JH7100_CLK_PERH0_SRC), + JH7100_GDIV(JH7100_CLK_TIMER3_CORE, "timer3_coreclk", 0, 63, JH7100_CLK_PERH0_SRC), + JH7100_GDIV(JH7100_CLK_TIMER4_CORE, "timer4_coreclk", 0, 63, JH7100_CLK_PERH0_SRC), + JH7100_GDIV(JH7100_CLK_TIMER5_CORE, "timer5_coreclk", 0, 63, JH7100_CLK_PERH0_SRC), + JH7100_GDIV(JH7100_CLK_TIMER6_CORE, "timer6_coreclk", 0, 63, JH7100_CLK_PERH0_SRC), + JH7100_GATE(JH7100_CLK_VP6INTC_APB, "vp6intc_apb", 0, JH7100_CLK_APB2_BUS), + JH7100_GATE(JH7100_CLK_PWM_APB, "pwm_apb", 0, JH7100_CLK_APB2_BUS), + JH7100_GATE(JH7100_CLK_MSI_APB, "msi_apb", 0, JH7100_CLK_APB2_BUS), + JH7100_GATE(JH7100_CLK_TEMP_APB, "temp_apb", 0, JH7100_CLK_APB2_BUS), + JH7100_GDIV(JH7100_CLK_TEMP_SENSE, "temp_sense", 0, 31, JH7100_CLK_OSC_SYS), + JH7100_GATE(JH7100_CLK_SYSERR_APB, "syserr_apb", 0, JH7100_CLK_APB2_BUS), +}; + +struct jh7100_clk { + struct clk_hw hw; + unsigned int idx; + unsigned int max_div; +}; + +struct jh7100_clk_priv { + /* protect clk enable and set rate/parent from happening at the same time */ + spinlock_t rmw_lock; + struct device *dev; + void __iomem *base; + struct clk_hw *pll[3]; + struct jh7100_clk reg[JH7100_CLK_PLL0_OUT]; +}; + +static struct jh7100_clk *jh7100_clk_from(struct clk_hw *hw) +{ + return container_of(hw, struct jh7100_clk, hw); +} + +static struct jh7100_clk_priv *jh7100_priv_from(struct jh7100_clk *clk) +{ + return container_of(clk, struct jh7100_clk_priv, reg[clk->idx]); +} + +static u32 jh7100_clk_reg_get(struct jh7100_clk *clk) +{ + struct jh7100_clk_priv *priv = jh7100_priv_from(clk); + void __iomem *reg = priv->base + 4 * clk->idx; + + return readl_relaxed(reg); +} + +static void jh7100_clk_reg_rmw(struct jh7100_clk *clk, u32 mask, u32 value) +{ + struct jh7100_clk_priv *priv = jh7100_priv_from(clk); + void __iomem *reg = priv->base + 4 * clk->idx; + unsigned long flags; + + spin_lock_irqsave(&priv->rmw_lock, flags); + value |= readl_relaxed(reg) & ~mask; + writel_relaxed(value, reg); + spin_unlock_irqrestore(&priv->rmw_lock, flags); +} + +static int jh7100_clk_enable(struct clk_hw *hw) +{ + struct jh7100_clk *clk = jh7100_clk_from(hw); + + jh7100_clk_reg_rmw(clk, JH7100_CLK_ENABLE, JH7100_CLK_ENABLE); + return 0; +} + +static void jh7100_clk_disable(struct clk_hw *hw) +{ + struct jh7100_clk *clk = jh7100_clk_from(hw); + + jh7100_clk_reg_rmw(clk, JH7100_CLK_ENABLE, 0); +} + +static int jh7100_clk_is_enabled(struct clk_hw *hw) +{ + struct jh7100_clk *clk = jh7100_clk_from(hw); + + return !!(jh7100_clk_reg_get(clk) & JH7100_CLK_ENABLE); +} + +static unsigned long jh7100_clk_recalc_rate(struct clk_hw *hw, + unsigned long parent_rate) +{ + struct jh7100_clk *clk = jh7100_clk_from(hw); + u32 div = jh7100_clk_reg_get(clk) & JH7100_CLK_DIV_MASK; + + return div ? parent_rate / div : 0; +} + +static unsigned long jh7100_clk_bestdiv(struct jh7100_clk *clk, + unsigned long rate, unsigned long parent) +{ + unsigned long max = clk->max_div; + unsigned long div = DIV_ROUND_UP(parent, rate); + + return min(div, max); +} + +static int jh7100_clk_determine_rate(struct clk_hw *hw, + struct clk_rate_request *req) +{ + struct jh7100_clk *clk = jh7100_clk_from(hw); + unsigned long parent = req->best_parent_rate; + unsigned long rate = clamp(req->rate, req->min_rate, req->max_rate); + unsigned long div = jh7100_clk_bestdiv(clk, rate, parent); + unsigned long result = parent / div; + + /* + * we want the result clamped by min_rate and max_rate if possible: + * case 1: div hits the max divider value, which means it's less than + * parent / rate, so the result is greater than rate and min_rate in + * particular. we can't do anything about result > max_rate because the + * divider doesn't go any further. + * case 2: div = DIV_ROUND_UP(parent, rate) which means the result is + * always lower or equal to rate and max_rate. however the result may + * turn out lower than min_rate, but then the next higher rate is fine: + * div - 1 = ceil(parent / rate) - 1 < parent / rate + * and thus + * min_rate <= rate < parent / (div - 1) + */ + if (result < req->min_rate && div > 1) + result = parent / (div - 1); + + req->rate = result; + return 0; +} + +static int jh7100_clk_set_rate(struct clk_hw *hw, + unsigned long rate, + unsigned long parent_rate) +{ + struct jh7100_clk *clk = jh7100_clk_from(hw); + unsigned long div = jh7100_clk_bestdiv(clk, rate, parent_rate); + + jh7100_clk_reg_rmw(clk, JH7100_CLK_DIV_MASK, div); + return 0; +} + +static u8 jh7100_clk_get_parent(struct clk_hw *hw) +{ + struct jh7100_clk *clk = jh7100_clk_from(hw); + u32 value = jh7100_clk_reg_get(clk); + + return (value & JH7100_CLK_MUX_MASK) >> JH7100_CLK_MUX_SHIFT; +} + +static int jh7100_clk_set_parent(struct clk_hw *hw, u8 index) +{ + struct jh7100_clk *clk = jh7100_clk_from(hw); + u32 value = (u32)index << JH7100_CLK_MUX_SHIFT; + + jh7100_clk_reg_rmw(clk, JH7100_CLK_MUX_MASK, value); + return 0; +} + +static int jh7100_clk_mux_determine_rate(struct clk_hw *hw, + struct clk_rate_request *req) +{ + return clk_mux_determine_rate_flags(hw, req, 0); +} + +static int jh7100_clk_get_phase(struct clk_hw *hw) +{ + struct jh7100_clk *clk = jh7100_clk_from(hw); + u32 value = jh7100_clk_reg_get(clk); + + return (value & JH7100_CLK_INVERT) ? 180 : 0; +} + +static int jh7100_clk_set_phase(struct clk_hw *hw, int degrees) +{ + struct jh7100_clk *clk = jh7100_clk_from(hw); + u32 value; + + if (degrees == 0) + value = 0; + else if (degrees == 180) + value = JH7100_CLK_INVERT; + else + return -EINVAL; + + jh7100_clk_reg_rmw(clk, JH7100_CLK_INVERT, value); + return 0; +} + +#ifdef CONFIG_DEBUG_FS +static void jh7100_clk_debug_init(struct clk_hw *hw, struct dentry *dentry) +{ + static const struct debugfs_reg32 jh7100_clk_reg = { + .name = "CTRL", + .offset = 0, + }; + struct jh7100_clk *clk = jh7100_clk_from(hw); + struct jh7100_clk_priv *priv = jh7100_priv_from(clk); + struct debugfs_regset32 *regset; + + regset = devm_kzalloc(priv->dev, sizeof(*regset), GFP_KERNEL); + if (!regset) + return; + + regset->regs = &jh7100_clk_reg; + regset->nregs = 1; + regset->base = priv->base + 4 * clk->idx; + + debugfs_create_regset32("registers", 0400, dentry, regset); +} +#else +#define jh7100_clk_debug_init NULL +#endif + +static const struct clk_ops jh7100_clk_gate_ops = { + .enable = jh7100_clk_enable, + .disable = jh7100_clk_disable, + .is_enabled = jh7100_clk_is_enabled, + .debug_init = jh7100_clk_debug_init, +}; + +static const struct clk_ops jh7100_clk_div_ops = { + .recalc_rate = jh7100_clk_recalc_rate, + .determine_rate = jh7100_clk_determine_rate, + .set_rate = jh7100_clk_set_rate, + .debug_init = jh7100_clk_debug_init, +}; + +static const struct clk_ops jh7100_clk_gdiv_ops = { + .enable = jh7100_clk_enable, + .disable = jh7100_clk_disable, + .is_enabled = jh7100_clk_is_enabled, + .recalc_rate = jh7100_clk_recalc_rate, + .determine_rate = jh7100_clk_determine_rate, + .set_rate = jh7100_clk_set_rate, + .debug_init = jh7100_clk_debug_init, +}; + +static const struct clk_ops jh7100_clk_mux_ops = { + .determine_rate = jh7100_clk_mux_determine_rate, + .set_parent = jh7100_clk_set_parent, + .get_parent = jh7100_clk_get_parent, + .debug_init = jh7100_clk_debug_init, +}; + +static const struct clk_ops jh7100_clk_gmux_ops = { + .enable = jh7100_clk_enable, + .disable = jh7100_clk_disable, + .is_enabled = jh7100_clk_is_enabled, + .determine_rate = jh7100_clk_mux_determine_rate, + .set_parent = jh7100_clk_set_parent, + .get_parent = jh7100_clk_get_parent, + .debug_init = jh7100_clk_debug_init, +}; + +static const struct clk_ops jh7100_clk_inv_ops = { + .get_phase = jh7100_clk_get_phase, + .set_phase = jh7100_clk_set_phase, + .debug_init = jh7100_clk_debug_init, +}; + +static const struct clk_ops *__init jh7100_clk_ops(u32 max) +{ + if (max & JH7100_CLK_DIV_MASK) { + if (max & JH7100_CLK_ENABLE) + return &jh7100_clk_gdiv_ops; + return &jh7100_clk_div_ops; + } + + if (max & JH7100_CLK_MUX_MASK) { + if (max & JH7100_CLK_ENABLE) + return &jh7100_clk_gmux_ops; + return &jh7100_clk_mux_ops; + } + + if (max & JH7100_CLK_ENABLE) + return &jh7100_clk_gate_ops; + + return &jh7100_clk_inv_ops; +} + +static struct clk_hw *jh7100_clk_get(struct of_phandle_args *clkspec, void *data) +{ + struct jh7100_clk_priv *priv = data; + unsigned int idx = clkspec->args[0]; + + if (idx < JH7100_CLK_PLL0_OUT) + return &priv->reg[idx].hw; + + if (idx < JH7100_CLK_END) + return priv->pll[idx - JH7100_CLK_PLL0_OUT]; + + return ERR_PTR(-EINVAL); +} + +static int __init clk_starfive_jh7100_probe(struct platform_device *pdev) +{ + struct jh7100_clk_priv *priv; + unsigned int idx; + int ret; + + priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL); + if (!priv) + return -ENOMEM; + + spin_lock_init(&priv->rmw_lock); + priv->dev = &pdev->dev; + priv->base = devm_platform_ioremap_resource(pdev, 0); + if (IS_ERR(priv->base)) + return PTR_ERR(priv->base); + + priv->pll[0] = devm_clk_hw_register_fixed_factor(priv->dev, "pll0_out", + "osc_sys", 0, 40, 1); + if (IS_ERR(priv->pll[0])) + return PTR_ERR(priv->pll[0]); + + priv->pll[1] = devm_clk_hw_register_fixed_factor(priv->dev, "pll1_out", + "osc_sys", 0, 64, 1); + if (IS_ERR(priv->pll[1])) + return PTR_ERR(priv->pll[1]); + + priv->pll[2] = devm_clk_hw_register_fixed_factor(priv->dev, "pll2_out", + "pll2_refclk", 0, 55, 1); + if (IS_ERR(priv->pll[2])) + return PTR_ERR(priv->pll[2]); + + for (idx = 0; idx < JH7100_CLK_PLL0_OUT; idx++) { + u32 max = jh7100_clk_data[idx].max; + struct clk_parent_data parents[4] = {}; + struct clk_init_data init = { + .name = jh7100_clk_data[idx].name, + .ops = jh7100_clk_ops(max), + .parent_data = parents, + .num_parents = ((max & JH7100_CLK_MUX_MASK) >> JH7100_CLK_MUX_SHIFT) + 1, + .flags = jh7100_clk_data[idx].flags, + }; + struct jh7100_clk *clk = &priv->reg[idx]; + unsigned int i; + + for (i = 0; i < init.num_parents; i++) { + unsigned int pidx = jh7100_clk_data[idx].parents[i]; + + if (pidx < JH7100_CLK_PLL0_OUT) + parents[i].hw = &priv->reg[pidx].hw; + else if (pidx < JH7100_CLK_END) + parents[i].hw = priv->pll[pidx - JH7100_CLK_PLL0_OUT]; + else if (pidx == JH7100_CLK_OSC_SYS) + parents[i].fw_name = "osc_sys"; + else if (pidx == JH7100_CLK_OSC_AUD) + parents[i].fw_name = "osc_aud"; + else if (pidx == JH7100_CLK_GMAC_RMII_REF) + parents[i].fw_name = "gmac_rmii_ref"; + else if (pidx == JH7100_CLK_GMAC_GR_MII_RX) + parents[i].fw_name = "gmac_gr_mii_rxclk"; + } + + clk->hw.init = &init; + clk->idx = idx; + clk->max_div = max & JH7100_CLK_DIV_MASK; + + ret = devm_clk_hw_register(priv->dev, &clk->hw); + if (ret) + return ret; + } + + return devm_of_clk_add_hw_provider(priv->dev, jh7100_clk_get, priv); +} + +static const struct of_device_id clk_starfive_jh7100_match[] = { + { .compatible = "starfive,jh7100-clkgen" }, + { /* sentinel */ } +}; + +static struct platform_driver clk_starfive_jh7100_driver = { + .driver = { + .name = "clk-starfive-jh7100", + .of_match_table = clk_starfive_jh7100_match, + .suppress_bind_attrs = true, + }, +}; +builtin_platform_driver_probe(clk_starfive_jh7100_driver, clk_starfive_jh7100_probe); diff --git a/drivers/pinctrl/Kconfig b/drivers/pinctrl/Kconfig index 6a961d5f8726..0d5b61e4c21e 100644 --- a/drivers/pinctrl/Kconfig +++ b/drivers/pinctrl/Kconfig @@ -281,6 +281,23 @@ config PINCTRL_ST select PINCONF select GPIOLIB_IRQCHIP +config PINCTRL_STARFIVE + tristate "Pinctrl and GPIO driver for the StarFive JH7100 SoC" + depends on SOC_STARFIVE || COMPILE_TEST + depends on OF + default SOC_STARFIVE + select GENERIC_PINCTRL_GROUPS + select GENERIC_PINMUX_FUNCTIONS + select GENERIC_PINCONF + select GPIOLIB + select GPIOLIB_IRQCHIP + select OF_GPIO + help + Say yes here to support pin control on the StarFive JH7100 SoC. + This also provides an interface to the GPIO pins not used by other + peripherals supporting inputs, outputs, configuring pull-up/pull-down + and interrupts on input changes. + config PINCTRL_STMFX tristate "STMicroelectronics STMFX GPIO expander pinctrl driver" depends on I2C diff --git a/drivers/pinctrl/Makefile b/drivers/pinctrl/Makefile index 5e63de2ffcf4..f5bdd6b209a6 100644 --- a/drivers/pinctrl/Makefile +++ b/drivers/pinctrl/Makefile @@ -39,6 +39,7 @@ obj-$(CONFIG_PINCTRL_LANTIQ) += pinctrl-lantiq.o obj-$(CONFIG_PINCTRL_LPC18XX) += pinctrl-lpc18xx.o obj-$(CONFIG_PINCTRL_TB10X) += pinctrl-tb10x.o obj-$(CONFIG_PINCTRL_ST) += pinctrl-st.o +obj-$(CONFIG_PINCTRL_STARFIVE) += pinctrl-starfive.o obj-$(CONFIG_PINCTRL_STMFX) += pinctrl-stmfx.o obj-$(CONFIG_PINCTRL_ZYNQ) += pinctrl-zynq.o obj-$(CONFIG_PINCTRL_ZYNQMP) += pinctrl-zynqmp.o diff --git a/drivers/pinctrl/pinctrl-starfive.c b/drivers/pinctrl/pinctrl-starfive.c new file mode 100644 index 000000000000..0b912152a405 --- /dev/null +++ b/drivers/pinctrl/pinctrl-starfive.c @@ -0,0 +1,1354 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Pinctrl / GPIO driver for StarFive JH7100 SoC + * + * Copyright (C) 2020 Shanghai StarFive Technology Co., Ltd. + * Copyright (C) 2021 Emil Renner Berthing <kernel@esmil.dk> + */ + +#include <linux/bits.h> +#include <linux/clk.h> +#include <linux/gpio/driver.h> +#include <linux/io.h> +#include <linux/mod_devicetable.h> +#include <linux/module.h> +#include <linux/of.h> +#include <linux/platform_device.h> +#include <linux/reset.h> +#include <linux/spinlock.h> + +#include <linux/pinctrl/pinctrl.h> +#include <linux/pinctrl/pinmux.h> + +#include <dt-bindings/pinctrl/pinctrl-starfive.h> + +#include "core.h" +#include "pinctrl-utils.h" +#include "pinmux.h" +#include "pinconf.h" + +#define DRIVER_NAME "pinctrl-starfive" + +/* + * Refer to Section 12. GPIO Registers in the JH7100 data sheet: + * https://github.com/starfive-tech/JH7100_Docs + */ +#define NR_GPIOS 64 + +/* + * Global enable for GPIO interrupts. If bit 0 is set to 1 the GPIO interrupts + * are enabled. If set to 0 the GPIO interrupts are disabled. + */ +#define GPIOEN 0x000 + +/* + * The following 32-bit registers come in pairs, but only the offset of the + * first register is defined. The first controls (interrupts for) GPIO 0-31 and + * the second GPIO 32-63. + */ + +/* + * Interrupt Type. If set to 1 the interrupt is edge-triggered. If set to 0 the + * interrupt is level-triggered. + */ +#define GPIOIS 0x010 + +/* + * Edge-Trigger Interrupt Type. If set to 1 the interrupt gets triggered on + * both positive and negative edges. If set to 0 the interrupt is triggered by a + * single edge. + */ +#define GPIOIBE 0x018 + +/* + * Interrupt Trigger Polarity. If set to 1 the interrupt is triggered on a + * rising edge (edge-triggered) or high level (level-triggered). If set to 0 the + * interrupt is triggered on a falling edge (edge-triggered) or low level + * (level-triggered). + */ +#define GPIOIEV 0x020 + +/* + * Interrupt Mask. If set to 1 the interrupt is enabled (unmasked). If set to 0 + * the interrupt is disabled (masked). Note that the current documentation is + * wrong and says the exct opposite of this. + */ +#define GPIOIE 0x028 + +/* + * Clear Edge-Triggered Interrupts. Write a 1 to clear the edge-triggered + * interrupt. + */ +#define GPIOIC 0x030 + +/* + * Edge-Triggered Interrupt Status. A 1 means the configured edge was detected. + */ +#define GPIORIS 0x038 + +/* + * Interrupt Status after Masking. A 1 means the configured edge or level was + * detected and not masked. + */ +#define GPIOMIS 0x040 + +/* + * Data Value. Dynamically reflects the value of the GPIO pin. If 1 the pin is + * a digital 1 and if 0 the pin is a digital 0. + */ +#define GPIODIN 0x048 + +/* + * From the data sheet section 12.2, there are 64 32-bit output data registers + * and 64 output enable registers. Output data and output enable registers for + * a given GPIO are contiguous. Eg. GPO0_DOUT_CFG is 0x50 and GPO0_DOEN_CFG is + * 0x54 while GPO1_DOUT_CFG is 0x58 and GPO1_DOEN_CFG is 0x5c. The stride + * between GPIO registers is effectively 8, thus: GPOn_DOUT_CFG is 0x50 + 8n + * and GPOn_DOEN_CFG is 0x54 + 8n. + */ +#define GPON_DOUT_CFG 0x050 +#define GPON_DOEN_CFG 0x054 + +/* + * From Section 12.3, there are 75 input signal configuration registers which + * are 4 bytes wide starting with GPI_CPU_JTAG_TCK_CFG at 0x250 and ending with + * GPI_USB_OVER_CURRENT_CFG 0x378 + */ +#define GPI_CFG_OFFSET 0x250 + +/* + * Pad Control Bits. There are 16 pad control bits for each pin located in 103 + * 32-bit registers controlling PAD_GPIO[0] to PAD_GPIO[63] followed by + * PAD_FUNC_SHARE[0] to PAD_FUNC_SHARE[141]. Odd numbered pins use the upper 16 + * bit of each register. + */ +#define PAD_SLEW_RATE_MASK GENMASK(11, 9) +#define PAD_SLEW_RATE_POS 9 +#define PAD_BIAS_STRONG_PULL_UP BIT(8) +#define PAD_INPUT_ENABLE BIT(7) +#define PAD_INPUT_SCHMITT_ENABLE BIT(6) +#define PAD_BIAS_DISABLE BIT(5) +#define PAD_BIAS_PULL_DOWN BIT(4) +#define PAD_BIAS_MASK \ + (PAD_BIAS_STRONG_PULL_UP | \ + PAD_BIAS_DISABLE | \ + PAD_BIAS_PULL_DOWN) +#define PAD_DRIVE_STRENGTH_MASK GENMASK(3, 0) +#define PAD_DRIVE_STRENGTH_POS 0 + +/* + * From Section 11, the IO_PADSHARE_SEL register can be programmed to select + * one of seven pre-defined multiplexed signal groups on PAD_FUNC_SHARE and + * PAD_GPIO pads. This is a global setting. + */ +#define IO_PADSHARE_SEL 0x1a0 + +/* + * This just needs to be some number such that when + * sfp->gpio.pin_base = PAD_INVALID_GPIO then + * starfive_pin_to_gpio(sfp, validpin) is never a valid GPIO number. + * That is it should underflow and return something >= NR_GPIOS. + */ +#define PAD_INVALID_GPIO 0x10000 + +/* + * The packed pinmux values from the device tree look like this: + * + * | 31 - 24 | 23 - 16 | 15 - 8 | 7 | 6 | 5 - 0 | + * | dout | doen | din | dout rev | doen rev | gpio nr | + * + * ..but the GPOn_DOUT_CFG and GPOn_DOEN_CFG registers look like this: + * + * | 31 | 30 - 8 | 7 - 0 | + * | dout/doen rev | unused | dout/doen | + */ +static unsigned int starfive_pinmux_to_gpio(u32 v) +{ + return v & (NR_GPIOS - 1); +} + +static u32 starfive_pinmux_to_dout(u32 v) +{ + return ((v & BIT(7)) << (31 - 7)) | ((v >> 24) & GENMASK(7, 0)); +} + +static u32 starfive_pinmux_to_doen(u32 v) +{ + return ((v & BIT(6)) << (31 - 6)) | ((v >> 16) & GENMASK(7, 0)); +} + +static u32 starfive_pinmux_to_din(u32 v) +{ + return (v >> 8) & GENMASK(7, 0); +} + +/* + * The maximum GPIO output current depends on the chosen drive strength: + * + * DS: 0 1 2 3 4 5 6 7 + * mA: 14.2 21.2 28.2 35.2 42.2 49.1 56.0 62.8 + * + * After rounding that is 7*DS + 14 mA + */ +static u32 starfive_drive_strength_to_max_mA(u16 ds) +{ + return 7 * ds + 14; +} + +static u16 starfive_drive_strength_from_max_mA(u32 i) +{ + return (clamp(i, 14U, 63U) - 14) / 7; +} + +struct starfive_pinctrl { + struct gpio_chip gc; + struct pinctrl_gpio_range gpios; + raw_spinlock_t lock; + void __iomem *base; + void __iomem *padctl; + struct pinctrl_dev *pctl; +}; + +static inline unsigned int starfive_pin_to_gpio(const struct starfive_pinctrl *sfp, + unsigned int pin) +{ + return pin - sfp->gpios.pin_base; +} + +static inline unsigned int starfive_gpio_to_pin(const struct starfive_pinctrl *sfp, + unsigned int gpio) +{ + return sfp->gpios.pin_base + gpio; +} + +static struct starfive_pinctrl *starfive_from_irq_data(struct irq_data *d) +{ + struct gpio_chip *gc = irq_data_get_irq_chip_data(d); + + return container_of(gc, struct starfive_pinctrl, gc); +} + +static struct starfive_pinctrl *starfive_from_irq_desc(struct irq_desc *desc) +{ + struct gpio_chip *gc = irq_desc_get_handler_data(desc); + + return container_of(gc, struct starfive_pinctrl, gc); +} + +static const struct pinctrl_pin_desc starfive_pins[] = { + PINCTRL_PIN(PAD_GPIO(0), "GPIO[0]"), + PINCTRL_PIN(PAD_GPIO(1), "GPIO[1]"), + PINCTRL_PIN(PAD_GPIO(2), "GPIO[2]"), + PINCTRL_PIN(PAD_GPIO(3), "GPIO[3]"), + PINCTRL_PIN(PAD_GPIO(4), "GPIO[4]"), + PINCTRL_PIN(PAD_GPIO(5), "GPIO[5]"), + PINCTRL_PIN(PAD_GPIO(6), "GPIO[6]"), + PINCTRL_PIN(PAD_GPIO(7), "GPIO[7]"), + PINCTRL_PIN(PAD_GPIO(8), "GPIO[8]"), + PINCTRL_PIN(PAD_GPIO(9), "GPIO[9]"), + PINCTRL_PIN(PAD_GPIO(10), "GPIO[10]"), + PINCTRL_PIN(PAD_GPIO(11), "GPIO[11]"), + PINCTRL_PIN(PAD_GPIO(12), "GPIO[12]"), + PINCTRL_PIN(PAD_GPIO(13), "GPIO[13]"), + PINCTRL_PIN(PAD_GPIO(14), "GPIO[14]"), + PINCTRL_PIN(PAD_GPIO(15), "GPIO[15]"), + PINCTRL_PIN(PAD_GPIO(16), "GPIO[16]"), + PINCTRL_PIN(PAD_GPIO(17), "GPIO[17]"), + PINCTRL_PIN(PAD_GPIO(18), "GPIO[18]"), + PINCTRL_PIN(PAD_GPIO(19), "GPIO[19]"), + PINCTRL_PIN(PAD_GPIO(20), "GPIO[20]"), + PINCTRL_PIN(PAD_GPIO(21), "GPIO[21]"), + PINCTRL_PIN(PAD_GPIO(22), "GPIO[22]"), + PINCTRL_PIN(PAD_GPIO(23), "GPIO[23]"), + PINCTRL_PIN(PAD_GPIO(24), "GPIO[24]"), + PINCTRL_PIN(PAD_GPIO(25), "GPIO[25]"), + PINCTRL_PIN(PAD_GPIO(26), "GPIO[26]"), + PINCTRL_PIN(PAD_GPIO(27), "GPIO[27]"), + PINCTRL_PIN(PAD_GPIO(28), "GPIO[28]"), + PINCTRL_PIN(PAD_GPIO(29), "GPIO[29]"), + PINCTRL_PIN(PAD_GPIO(30), "GPIO[30]"), + PINCTRL_PIN(PAD_GPIO(31), "GPIO[31]"), + PINCTRL_PIN(PAD_GPIO(32), "GPIO[32]"), + PINCTRL_PIN(PAD_GPIO(33), "GPIO[33]"), + PINCTRL_PIN(PAD_GPIO(34), "GPIO[34]"), + PINCTRL_PIN(PAD_GPIO(35), "GPIO[35]"), + PINCTRL_PIN(PAD_GPIO(36), "GPIO[36]"), + PINCTRL_PIN(PAD_GPIO(37), "GPIO[37]"), + PINCTRL_PIN(PAD_GPIO(38), "GPIO[38]"), + PINCTRL_PIN(PAD_GPIO(39), "GPIO[39]"), + PINCTRL_PIN(PAD_GPIO(40), "GPIO[40]"), + PINCTRL_PIN(PAD_GPIO(41), "GPIO[41]"), + PINCTRL_PIN(PAD_GPIO(42), "GPIO[42]"), + PINCTRL_PIN(PAD_GPIO(43), "GPIO[43]"), + PINCTRL_PIN(PAD_GPIO(44), "GPIO[44]"), + PINCTRL_PIN(PAD_GPIO(45), "GPIO[45]"), + PINCTRL_PIN(PAD_GPIO(46), "GPIO[46]"), + PINCTRL_PIN(PAD_GPIO(47), "GPIO[47]"), + PINCTRL_PIN(PAD_GPIO(48), "GPIO[48]"), + PINCTRL_PIN(PAD_GPIO(49), "GPIO[49]"), + PINCTRL_PIN(PAD_GPIO(50), "GPIO[50]"), + PINCTRL_PIN(PAD_GPIO(51), "GPIO[51]"), + PINCTRL_PIN(PAD_GPIO(52), "GPIO[52]"), + PINCTRL_PIN(PAD_GPIO(53), "GPIO[53]"), + PINCTRL_PIN(PAD_GPIO(54), "GPIO[54]"), + PINCTRL_PIN(PAD_GPIO(55), "GPIO[55]"), + PINCTRL_PIN(PAD_GPIO(56), "GPIO[56]"), + PINCTRL_PIN(PAD_GPIO(57), "GPIO[57]"), + PINCTRL_PIN(PAD_GPIO(58), "GPIO[58]"), + PINCTRL_PIN(PAD_GPIO(59), "GPIO[59]"), + PINCTRL_PIN(PAD_GPIO(60), "GPIO[60]"), + PINCTRL_PIN(PAD_GPIO(61), "GPIO[61]"), + PINCTRL_PIN(PAD_GPIO(62), "GPIO[62]"), + PINCTRL_PIN(PAD_GPIO(63), "GPIO[63]"), + PINCTRL_PIN(PAD_FUNC_SHARE(0), "FUNC_SHARE[0]"), + PINCTRL_PIN(PAD_FUNC_SHARE(1), "FUNC_SHARE[1]"), + PINCTRL_PIN(PAD_FUNC_SHARE(2), "FUNC_SHARE[2]"), + PINCTRL_PIN(PAD_FUNC_SHARE(3), "FUNC_SHARE[3]"), + PINCTRL_PIN(PAD_FUNC_SHARE(4), "FUNC_SHARE[4]"), + PINCTRL_PIN(PAD_FUNC_SHARE(5), "FUNC_SHARE[5]"), + PINCTRL_PIN(PAD_FUNC_SHARE(6), "FUNC_SHARE[6]"), + PINCTRL_PIN(PAD_FUNC_SHARE(7), "FUNC_SHARE[7]"), + PINCTRL_PIN(PAD_FUNC_SHARE(8), "FUNC_SHARE[8]"), + PINCTRL_PIN(PAD_FUNC_SHARE(9), "FUNC_SHARE[9]"), + PINCTRL_PIN(PAD_FUNC_SHARE(10), "FUNC_SHARE[10]"), + PINCTRL_PIN(PAD_FUNC_SHARE(11), "FUNC_SHARE[11]"), + PINCTRL_PIN(PAD_FUNC_SHARE(12), "FUNC_SHARE[12]"), + PINCTRL_PIN(PAD_FUNC_SHARE(13), "FUNC_SHARE[13]"), + PINCTRL_PIN(PAD_FUNC_SHARE(14), "FUNC_SHARE[14]"), + PINCTRL_PIN(PAD_FUNC_SHARE(15), "FUNC_SHARE[15]"), + PINCTRL_PIN(PAD_FUNC_SHARE(16), "FUNC_SHARE[16]"), + PINCTRL_PIN(PAD_FUNC_SHARE(17), "FUNC_SHARE[17]"), + PINCTRL_PIN(PAD_FUNC_SHARE(18), "FUNC_SHARE[18]"), + PINCTRL_PIN(PAD_FUNC_SHARE(19), "FUNC_SHARE[19]"), + PINCTRL_PIN(PAD_FUNC_SHARE(20), "FUNC_SHARE[20]"), + PINCTRL_PIN(PAD_FUNC_SHARE(21), "FUNC_SHARE[21]"), + PINCTRL_PIN(PAD_FUNC_SHARE(22), "FUNC_SHARE[22]"), + PINCTRL_PIN(PAD_FUNC_SHARE(23), "FUNC_SHARE[23]"), + PINCTRL_PIN(PAD_FUNC_SHARE(24), "FUNC_SHARE[24]"), + PINCTRL_PIN(PAD_FUNC_SHARE(25), "FUNC_SHARE[25]"), + PINCTRL_PIN(PAD_FUNC_SHARE(26), "FUNC_SHARE[26]"), + PINCTRL_PIN(PAD_FUNC_SHARE(27), "FUNC_SHARE[27]"), + PINCTRL_PIN(PAD_FUNC_SHARE(28), "FUNC_SHARE[28]"), + PINCTRL_PIN(PAD_FUNC_SHARE(29), "FUNC_SHARE[29]"), + PINCTRL_PIN(PAD_FUNC_SHARE(30), "FUNC_SHARE[30]"), + PINCTRL_PIN(PAD_FUNC_SHARE(31), "FUNC_SHARE[31]"), + PINCTRL_PIN(PAD_FUNC_SHARE(32), "FUNC_SHARE[32]"), + PINCTRL_PIN(PAD_FUNC_SHARE(33), "FUNC_SHARE[33]"), + PINCTRL_PIN(PAD_FUNC_SHARE(34), "FUNC_SHARE[34]"), + PINCTRL_PIN(PAD_FUNC_SHARE(35), "FUNC_SHARE[35]"), + PINCTRL_PIN(PAD_FUNC_SHARE(36), "FUNC_SHARE[36]"), + PINCTRL_PIN(PAD_FUNC_SHARE(37), "FUNC_SHARE[37]"), + PINCTRL_PIN(PAD_FUNC_SHARE(38), "FUNC_SHARE[38]"), + PINCTRL_PIN(PAD_FUNC_SHARE(39), "FUNC_SHARE[39]"), + PINCTRL_PIN(PAD_FUNC_SHARE(40), "FUNC_SHARE[40]"), + PINCTRL_PIN(PAD_FUNC_SHARE(41), "FUNC_SHARE[41]"), + PINCTRL_PIN(PAD_FUNC_SHARE(42), "FUNC_SHARE[42]"), + PINCTRL_PIN(PAD_FUNC_SHARE(43), "FUNC_SHARE[43]"), + PINCTRL_PIN(PAD_FUNC_SHARE(44), "FUNC_SHARE[44]"), + PINCTRL_PIN(PAD_FUNC_SHARE(45), "FUNC_SHARE[45]"), + PINCTRL_PIN(PAD_FUNC_SHARE(46), "FUNC_SHARE[46]"), + PINCTRL_PIN(PAD_FUNC_SHARE(47), "FUNC_SHARE[47]"), + PINCTRL_PIN(PAD_FUNC_SHARE(48), "FUNC_SHARE[48]"), + PINCTRL_PIN(PAD_FUNC_SHARE(49), "FUNC_SHARE[49]"), + PINCTRL_PIN(PAD_FUNC_SHARE(50), "FUNC_SHARE[50]"), + PINCTRL_PIN(PAD_FUNC_SHARE(51), "FUNC_SHARE[51]"), + PINCTRL_PIN(PAD_FUNC_SHARE(52), "FUNC_SHARE[52]"), + PINCTRL_PIN(PAD_FUNC_SHARE(53), "FUNC_SHARE[53]"), + PINCTRL_PIN(PAD_FUNC_SHARE(54), "FUNC_SHARE[54]"), + PINCTRL_PIN(PAD_FUNC_SHARE(55), "FUNC_SHARE[55]"), + PINCTRL_PIN(PAD_FUNC_SHARE(56), "FUNC_SHARE[56]"), + PINCTRL_PIN(PAD_FUNC_SHARE(57), "FUNC_SHARE[57]"), + PINCTRL_PIN(PAD_FUNC_SHARE(58), "FUNC_SHARE[58]"), + PINCTRL_PIN(PAD_FUNC_SHARE(59), "FUNC_SHARE[59]"), + PINCTRL_PIN(PAD_FUNC_SHARE(60), "FUNC_SHARE[60]"), + PINCTRL_PIN(PAD_FUNC_SHARE(61), "FUNC_SHARE[61]"), + PINCTRL_PIN(PAD_FUNC_SHARE(62), "FUNC_SHARE[62]"), + PINCTRL_PIN(PAD_FUNC_SHARE(63), "FUNC_SHARE[63]"), + PINCTRL_PIN(PAD_FUNC_SHARE(64), "FUNC_SHARE[64]"), + PINCTRL_PIN(PAD_FUNC_SHARE(65), "FUNC_SHARE[65]"), + PINCTRL_PIN(PAD_FUNC_SHARE(66), "FUNC_SHARE[66]"), + PINCTRL_PIN(PAD_FUNC_SHARE(67), "FUNC_SHARE[67]"), + PINCTRL_PIN(PAD_FUNC_SHARE(68), "FUNC_SHARE[68]"), + PINCTRL_PIN(PAD_FUNC_SHARE(69), "FUNC_SHARE[69]"), + PINCTRL_PIN(PAD_FUNC_SHARE(70), "FUNC_SHARE[70]"), + PINCTRL_PIN(PAD_FUNC_SHARE(71), "FUNC_SHARE[71]"), + PINCTRL_PIN(PAD_FUNC_SHARE(72), "FUNC_SHARE[72]"), + PINCTRL_PIN(PAD_FUNC_SHARE(73), "FUNC_SHARE[73]"), + PINCTRL_PIN(PAD_FUNC_SHARE(74), "FUNC_SHARE[74]"), + PINCTRL_PIN(PAD_FUNC_SHARE(75), "FUNC_SHARE[75]"), + PINCTRL_PIN(PAD_FUNC_SHARE(76), "FUNC_SHARE[76]"), + PINCTRL_PIN(PAD_FUNC_SHARE(77), "FUNC_SHARE[77]"), + PINCTRL_PIN(PAD_FUNC_SHARE(78), "FUNC_SHARE[78]"), + PINCTRL_PIN(PAD_FUNC_SHARE(79), "FUNC_SHARE[79]"), + PINCTRL_PIN(PAD_FUNC_SHARE(80), "FUNC_SHARE[80]"), + PINCTRL_PIN(PAD_FUNC_SHARE(81), "FUNC_SHARE[81]"), + PINCTRL_PIN(PAD_FUNC_SHARE(82), "FUNC_SHARE[82]"), + PINCTRL_PIN(PAD_FUNC_SHARE(83), "FUNC_SHARE[83]"), + PINCTRL_PIN(PAD_FUNC_SHARE(84), "FUNC_SHARE[84]"), + PINCTRL_PIN(PAD_FUNC_SHARE(85), "FUNC_SHARE[85]"), + PINCTRL_PIN(PAD_FUNC_SHARE(86), "FUNC_SHARE[86]"), + PINCTRL_PIN(PAD_FUNC_SHARE(87), "FUNC_SHARE[87]"), + PINCTRL_PIN(PAD_FUNC_SHARE(88), "FUNC_SHARE[88]"), + PINCTRL_PIN(PAD_FUNC_SHARE(89), "FUNC_SHARE[89]"), + PINCTRL_PIN(PAD_FUNC_SHARE(90), "FUNC_SHARE[90]"), + PINCTRL_PIN(PAD_FUNC_SHARE(91), "FUNC_SHARE[91]"), + PINCTRL_PIN(PAD_FUNC_SHARE(92), "FUNC_SHARE[92]"), + PINCTRL_PIN(PAD_FUNC_SHARE(93), "FUNC_SHARE[93]"), + PINCTRL_PIN(PAD_FUNC_SHARE(94), "FUNC_SHARE[94]"), + PINCTRL_PIN(PAD_FUNC_SHARE(95), "FUNC_SHARE[95]"), + PINCTRL_PIN(PAD_FUNC_SHARE(96), "FUNC_SHARE[96]"), + PINCTRL_PIN(PAD_FUNC_SHARE(97), "FUNC_SHARE[97]"), + PINCTRL_PIN(PAD_FUNC_SHARE(98), "FUNC_SHARE[98]"), + PINCTRL_PIN(PAD_FUNC_SHARE(99), "FUNC_SHARE[99]"), + PINCTRL_PIN(PAD_FUNC_SHARE(100), "FUNC_SHARE[100]"), + PINCTRL_PIN(PAD_FUNC_SHARE(101), "FUNC_SHARE[101]"), + PINCTRL_PIN(PAD_FUNC_SHARE(102), "FUNC_SHARE[102]"), + PINCTRL_PIN(PAD_FUNC_SHARE(103), "FUNC_SHARE[103]"), + PINCTRL_PIN(PAD_FUNC_SHARE(104), "FUNC_SHARE[104]"), + PINCTRL_PIN(PAD_FUNC_SHARE(105), "FUNC_SHARE[105]"), + PINCTRL_PIN(PAD_FUNC_SHARE(106), "FUNC_SHARE[106]"), + PINCTRL_PIN(PAD_FUNC_SHARE(107), "FUNC_SHARE[107]"), + PINCTRL_PIN(PAD_FUNC_SHARE(108), "FUNC_SHARE[108]"), + PINCTRL_PIN(PAD_FUNC_SHARE(109), "FUNC_SHARE[109]"), + PINCTRL_PIN(PAD_FUNC_SHARE(110), "FUNC_SHARE[110]"), + PINCTRL_PIN(PAD_FUNC_SHARE(111), "FUNC_SHARE[111]"), + PINCTRL_PIN(PAD_FUNC_SHARE(112), "FUNC_SHARE[112]"), + PINCTRL_PIN(PAD_FUNC_SHARE(113), "FUNC_SHARE[113]"), + PINCTRL_PIN(PAD_FUNC_SHARE(114), "FUNC_SHARE[114]"), + PINCTRL_PIN(PAD_FUNC_SHARE(115), "FUNC_SHARE[115]"), + PINCTRL_PIN(PAD_FUNC_SHARE(116), "FUNC_SHARE[116]"), + PINCTRL_PIN(PAD_FUNC_SHARE(117), "FUNC_SHARE[117]"), + PINCTRL_PIN(PAD_FUNC_SHARE(118), "FUNC_SHARE[118]"), + PINCTRL_PIN(PAD_FUNC_SHARE(119), "FUNC_SHARE[119]"), + PINCTRL_PIN(PAD_FUNC_SHARE(120), "FUNC_SHARE[120]"), + PINCTRL_PIN(PAD_FUNC_SHARE(121), "FUNC_SHARE[121]"), + PINCTRL_PIN(PAD_FUNC_SHARE(122), "FUNC_SHARE[122]"), + PINCTRL_PIN(PAD_FUNC_SHARE(123), "FUNC_SHARE[123]"), + PINCTRL_PIN(PAD_FUNC_SHARE(124), "FUNC_SHARE[124]"), + PINCTRL_PIN(PAD_FUNC_SHARE(125), "FUNC_SHARE[125]"), + PINCTRL_PIN(PAD_FUNC_SHARE(126), "FUNC_SHARE[126]"), + PINCTRL_PIN(PAD_FUNC_SHARE(127), "FUNC_SHARE[127]"), + PINCTRL_PIN(PAD_FUNC_SHARE(128), "FUNC_SHARE[128]"), + PINCTRL_PIN(PAD_FUNC_SHARE(129), "FUNC_SHARE[129]"), + PINCTRL_PIN(PAD_FUNC_SHARE(130), "FUNC_SHARE[130]"), + PINCTRL_PIN(PAD_FUNC_SHARE(131), "FUNC_SHARE[131]"), + PINCTRL_PIN(PAD_FUNC_SHARE(132), "FUNC_SHARE[132]"), + PINCTRL_PIN(PAD_FUNC_SHARE(133), "FUNC_SHARE[133]"), + PINCTRL_PIN(PAD_FUNC_SHARE(134), "FUNC_SHARE[134]"), + PINCTRL_PIN(PAD_FUNC_SHARE(135), "FUNC_SHARE[135]"), + PINCTRL_PIN(PAD_FUNC_SHARE(136), "FUNC_SHARE[136]"), + PINCTRL_PIN(PAD_FUNC_SHARE(137), "FUNC_SHARE[137]"), + PINCTRL_PIN(PAD_FUNC_SHARE(138), "FUNC_SHARE[138]"), + PINCTRL_PIN(PAD_FUNC_SHARE(139), "FUNC_SHARE[139]"), + PINCTRL_PIN(PAD_FUNC_SHARE(140), "FUNC_SHARE[140]"), + PINCTRL_PIN(PAD_FUNC_SHARE(141), "FUNC_SHARE[141]"), +}; + +#ifdef CONFIG_DEBUG_FS +static void starfive_pin_dbg_show(struct pinctrl_dev *pctldev, + struct seq_file *s, + unsigned int pin) +{ + struct starfive_pinctrl *sfp = pinctrl_dev_get_drvdata(pctldev); + unsigned int gpio = starfive_pin_to_gpio(sfp, pin); + void __iomem *reg; + u32 dout, doen; + + if (gpio >= NR_GPIOS) + return; + + reg = sfp->base + GPON_DOUT_CFG + 8 * gpio; + dout = readl_relaxed(reg + 0x000); + doen = readl_relaxed(reg + 0x004); + + seq_printf(s, "dout=%lu%s doen=%lu%s", + dout & GENMASK(7, 0), (dout & BIT(31)) ? "r" : "", + doen & GENMASK(7, 0), (doen & BIT(31)) ? "r" : ""); +} +#else +#define starfive_pin_dbg_show NULL +#endif + +static int starfive_dt_node_to_map(struct pinctrl_dev *pctldev, + struct device_node *np, + struct pinctrl_map **maps, + unsigned int *num_maps) +{ + struct starfive_pinctrl *sfp = pinctrl_dev_get_drvdata(pctldev); + struct device *dev = sfp->gc.parent; + struct device_node *child; + struct pinctrl_map *map; + const char **pgnames; + const char *grpname; + u32 *pinmux; + int ngroups; + int *pins; + int nmaps; + int ret; + + nmaps = 0; + ngroups = 0; + for_each_child_of_node(np, child) { + int npinmux = of_property_count_u32_elems(child, "pinmux"); + int npins = of_property_count_u32_elems(child, "pins"); + + if (npinmux > 0 && npins > 0) { + dev_err(dev, "invalid pinctrl group %pOFn.%pOFn: both pinmux and pins set\n", + np, child); + of_node_put(child); + return -EINVAL; + } + if (npinmux == 0 && npins == 0) { + dev_err(dev, "invalid pinctrl group %pOFn.%pOFn: neither pinmux nor pins set\n", + np, child); + of_node_put(child); + return -EINVAL; + } + + if (npinmux > 0) + nmaps += 2; + else + nmaps += 1; + ngroups += 1; + } + + pgnames = devm_kcalloc(dev, ngroups, sizeof(*pgnames), GFP_KERNEL); + if (!pgnames) + return -ENOMEM; + + map = kcalloc(nmaps, sizeof(*map), GFP_KERNEL); + if (!map) + return -ENOMEM; + + nmaps = 0; + ngroups = 0; + for_each_child_of_node(np, child) { + int npins; + int i; + + grpname = devm_kasprintf(dev, GFP_KERNEL, "%pOFn.%pOFn", np, child); + if (!grpname) { + ret = -ENOMEM; + goto put_child; + } + + pgnames[ngroups++] = grpname; + + if ((npins = of_property_count_u32_elems(child, "pinmux")) > 0) { + pins = devm_kcalloc(dev, npins, sizeof(*pins), GFP_KERNEL); + if (!pins) { + ret = -ENOMEM; + goto put_child; + } + + pinmux = devm_kcalloc(dev, npins, sizeof(*pinmux), GFP_KERNEL); + if (!pinmux) { + ret = -ENOMEM; + goto put_child; + } + + ret = of_property_read_u32_array(child, "pinmux", pinmux, npins); + if (ret) + goto put_child; + + for (i = 0; i < npins; i++) { + unsigned int gpio = starfive_pinmux_to_gpio(pinmux[i]); + + pins[i] = starfive_gpio_to_pin(sfp, gpio); + } + + map[nmaps].type = PIN_MAP_TYPE_MUX_GROUP; + map[nmaps].data.mux.function = np->name; + map[nmaps].data.mux.group = grpname; + nmaps += 1; + } else if ((npins = of_property_count_u32_elems(child, "pins")) > 0) { + pins = devm_kcalloc(dev, npins, sizeof(*pins), GFP_KERNEL); + if (!pins) { + ret = -ENOMEM; + goto put_child; + } + + pinmux = NULL; + + for (i = 0; i < npins; i++) { + u32 v; + + ret = of_property_read_u32_index(child, "pins", i, &v); + if (ret) + goto put_child; + pins[i] = v; + } + } else { + ret = -EINVAL; + goto put_child; + } + + ret = pinctrl_generic_add_group(pctldev, grpname, pins, npins, pinmux); + if (ret < 0) { + dev_err(dev, "error adding group %s: %d\n", grpname, ret); + goto put_child; + } + + ret = pinconf_generic_parse_dt_config(child, pctldev, + &map[nmaps].data.configs.configs, + &map[nmaps].data.configs.num_configs); + if (ret) { + dev_err(dev, "error parsing pin config of group %s: %d\n", + grpname, ret); + goto put_child; + } + + /* don't create a map if there are no pinconf settings */ + if (map[nmaps].data.configs.num_configs == 0) + continue; + + map[nmaps].type = PIN_MAP_TYPE_CONFIGS_GROUP; + map[nmaps].data.configs.group_or_pin = grpname; + nmaps += 1; + } + + ret = pinmux_generic_add_function(pctldev, np->name, pgnames, ngroups, NULL); + if (ret < 0) { + dev_err(dev, "error adding function %s: %d\n", np->name, ret); + goto free_map; + } + + *maps = map; + *num_maps = nmaps; + return 0; + +put_child: + of_node_put(child); +free_map: + pinctrl_utils_free_map(pctldev, map, nmaps); + return ret; +} + +static const struct pinctrl_ops starfive_pinctrl_ops = { + .get_groups_count = pinctrl_generic_get_group_count, + .get_group_name = pinctrl_generic_get_group_name, + .get_group_pins = pinctrl_generic_get_group_pins, + .pin_dbg_show = starfive_pin_dbg_show, + .dt_node_to_map = starfive_dt_node_to_map, + .dt_free_map = pinctrl_utils_free_map, +}; + +static int starfive_set_mux(struct pinctrl_dev *pctldev, + unsigned int fsel, unsigned int gsel) +{ + struct starfive_pinctrl *sfp = pinctrl_dev_get_drvdata(pctldev); + struct device *dev = sfp->gc.parent; + const struct group_desc *group; + const u32 *pinmux; + unsigned int i; + + group = pinctrl_generic_get_group(pctldev, gsel); + if (!group) + return -EINVAL; + + pinmux = group->data; + for (i = 0; i < group->num_pins; i++) { + u32 v = pinmux[i]; + unsigned int gpio = starfive_pinmux_to_gpio(v); + u32 dout = starfive_pinmux_to_dout(v); + u32 doen = starfive_pinmux_to_doen(v); + u32 din = starfive_pinmux_to_din(v); + void __iomem *reg_dout; + void __iomem *reg_doen; + void __iomem *reg_din; + unsigned long flags; + + dev_dbg(dev, "GPIO%u: dout=0x%x doen=0x%x din=0x%x\n", + gpio, dout, doen, din); + + reg_dout = sfp->base + GPON_DOUT_CFG + 8 * gpio; + reg_doen = sfp->base + GPON_DOEN_CFG + 8 * gpio; + if (din != GPI_NONE) + reg_din = sfp->base + GPI_CFG_OFFSET + 4 * din; + else + reg_din = NULL; + + raw_spin_lock_irqsave(&sfp->lock, flags); + writel_relaxed(dout, reg_dout); + writel_relaxed(doen, reg_doen); + if (reg_din) + writel_relaxed(gpio + 2, reg_din); + raw_spin_unlock_irqrestore(&sfp->lock, flags); + } + + return 0; +} + +static const struct pinmux_ops starfive_pinmux_ops = { + .get_functions_count = pinmux_generic_get_function_count, + .get_function_name = pinmux_generic_get_function_name, + .get_function_groups = pinmux_generic_get_function_groups, + .set_mux = starfive_set_mux, + .strict = true, +}; + +static u16 starfive_padctl_get(struct starfive_pinctrl *sfp, + unsigned int pin) +{ + void __iomem *reg = sfp->padctl + 4 * (pin / 2); + int shift = 16 * (pin % 2); + + return readl_relaxed(reg) >> shift; +} + +static void starfive_padctl_rmw(struct starfive_pinctrl *sfp, + unsigned int pin, + u16 _mask, u16 _value) +{ + void __iomem *reg = sfp->padctl + 4 * (pin / 2); + int shift = 16 * (pin % 2); + u32 mask = (u32)_mask << shift; + u32 value = (u32)_value << shift; + unsigned long flags; + + dev_dbg(sfp->gc.parent, "padctl_rmw(%u, 0x%03x, 0x%03x)\n", pin, _mask, _value); + + raw_spin_lock_irqsave(&sfp->lock, flags); + value |= readl_relaxed(reg) & ~mask; + writel_relaxed(value, reg); + raw_spin_unlock_irqrestore(&sfp->lock, flags); +} + +#define PIN_CONFIG_STARFIVE_STRONG_PULL_UP (PIN_CONFIG_END + 1) + +static const struct pinconf_generic_params starfive_pinconf_custom_params[] = { + { "starfive,strong-pull-up", PIN_CONFIG_STARFIVE_STRONG_PULL_UP, 1 }, +}; + +#ifdef CONFIG_DEBUG_FS +static const struct pin_config_item starfive_pinconf_custom_conf_items[] = { + PCONFDUMP(PIN_CONFIG_STARFIVE_STRONG_PULL_UP, "input bias strong pull-up", NULL, false), +}; + +static_assert(ARRAY_SIZE(starfive_pinconf_custom_conf_items) == + ARRAY_SIZE(starfive_pinconf_custom_params)); +#else +#define starfive_pinconf_custom_conf_items NULL +#endif + +static int starfive_pinconf_get(struct pinctrl_dev *pctldev, + unsigned int pin, unsigned long *config) +{ + struct starfive_pinctrl *sfp = pinctrl_dev_get_drvdata(pctldev); + int param = pinconf_to_config_param(*config); + u16 value = starfive_padctl_get(sfp, pin); + bool enabled; + u32 arg; + + switch (param) { + case PIN_CONFIG_BIAS_DISABLE: + enabled = value & PAD_BIAS_DISABLE; + arg = 0; + break; + case PIN_CONFIG_BIAS_PULL_DOWN: + enabled = value & PAD_BIAS_PULL_DOWN; + arg = 1; + break; + case PIN_CONFIG_BIAS_PULL_UP: + enabled = !(value & PAD_BIAS_MASK); + arg = 1; + break; + case PIN_CONFIG_DRIVE_STRENGTH: + enabled = value & PAD_DRIVE_STRENGTH_MASK; + arg = starfive_drive_strength_to_max_mA(value & PAD_DRIVE_STRENGTH_MASK); + break; + case PIN_CONFIG_INPUT_ENABLE: + enabled = value & PAD_INPUT_ENABLE; + arg = enabled; + break; + case PIN_CONFIG_INPUT_SCHMITT_ENABLE: + enabled = value & PAD_INPUT_SCHMITT_ENABLE; + arg = enabled; + break; + case PIN_CONFIG_SLEW_RATE: + enabled = value & PAD_SLEW_RATE_MASK; + arg = (value & PAD_SLEW_RATE_MASK) >> PAD_SLEW_RATE_POS; + break; + case PIN_CONFIG_STARFIVE_STRONG_PULL_UP: + enabled = value & PAD_BIAS_STRONG_PULL_UP; + arg = enabled; + break; + default: + return -ENOTSUPP; + } + + *config = pinconf_to_config_packed(param, arg); + return enabled ? 0 : -EINVAL; +} + +static int starfive_pinconf_group_get(struct pinctrl_dev *pctldev, + unsigned int gsel, unsigned long *config) +{ + const struct group_desc *group; + + group = pinctrl_generic_get_group(pctldev, gsel); + if (!group) + return -EINVAL; + + return starfive_pinconf_get(pctldev, group->pins[0], config); +} + +static int starfive_pinconf_group_set(struct pinctrl_dev *pctldev, + unsigned int gsel, + unsigned long *configs, + unsigned int num_configs) +{ + struct starfive_pinctrl *sfp = pinctrl_dev_get_drvdata(pctldev); + const struct group_desc *group; + u16 mask, value; + int i; + + group = pinctrl_generic_get_group(pctldev, gsel); + if (!group) + return -EINVAL; + + mask = 0; + value = 0; + for (i = 0; i < num_configs; i++) { + int param = pinconf_to_config_param(configs[i]); + u32 arg = pinconf_to_config_argument(configs[i]); + + switch (param) { + case PIN_CONFIG_BIAS_DISABLE: + mask |= PAD_BIAS_MASK; + value = (value & ~PAD_BIAS_MASK) | PAD_BIAS_DISABLE; + break; + case PIN_CONFIG_BIAS_PULL_DOWN: + if (arg == 0) + return -ENOTSUPP; + mask |= PAD_BIAS_MASK; + value = (value & ~PAD_BIAS_MASK) | PAD_BIAS_PULL_DOWN; + break; + case PIN_CONFIG_BIAS_PULL_UP: + if (arg == 0) + return -ENOTSUPP; + mask |= PAD_BIAS_MASK; + value = value & ~PAD_BIAS_MASK; + break; + case PIN_CONFIG_DRIVE_STRENGTH: + mask |= PAD_DRIVE_STRENGTH_MASK; + value = (value & ~PAD_DRIVE_STRENGTH_MASK) | + starfive_drive_strength_from_max_mA(arg); + break; + case PIN_CONFIG_INPUT_ENABLE: + mask |= PAD_INPUT_ENABLE; + if (arg) + value |= PAD_INPUT_ENABLE; + else + value &= ~PAD_INPUT_ENABLE; + break; + case PIN_CONFIG_INPUT_SCHMITT_ENABLE: + mask |= PAD_INPUT_SCHMITT_ENABLE; + if (arg) + value |= PAD_INPUT_SCHMITT_ENABLE; + else + value &= ~PAD_INPUT_SCHMITT_ENABLE; + break; + case PIN_CONFIG_SLEW_RATE: + mask |= PAD_SLEW_RATE_MASK; + value = (value & ~PAD_SLEW_RATE_MASK) | + ((arg << PAD_SLEW_RATE_POS) & PAD_SLEW_RATE_MASK); + break; + case PIN_CONFIG_STARFIVE_STRONG_PULL_UP: + if (arg) { + mask |= PAD_BIAS_MASK; + value = (value & ~PAD_BIAS_MASK) | + PAD_BIAS_STRONG_PULL_UP; + } else { + mask |= PAD_BIAS_STRONG_PULL_UP; + value = value & ~PAD_BIAS_STRONG_PULL_UP; + } + break; + default: + return -ENOTSUPP; + } + } + + for (i = 0; i < group->num_pins; i++) + starfive_padctl_rmw(sfp, group->pins[i], mask, value); + + return 0; +} + +#ifdef CONFIG_DEBUG_FS +static void starfive_pinconf_dbg_show(struct pinctrl_dev *pctldev, + struct seq_file *s, unsigned int pin) +{ + struct starfive_pinctrl *sfp = pinctrl_dev_get_drvdata(pctldev); + u16 value = starfive_padctl_get(sfp, pin); + + seq_printf(s, " (0x%03x)", value); +} +#else +#define starfive_pinconf_dbg_show NULL +#endif + +static const struct pinconf_ops starfive_pinconf_ops = { + .pin_config_get = starfive_pinconf_get, + .pin_config_group_get = starfive_pinconf_group_get, + .pin_config_group_set = starfive_pinconf_group_set, + .pin_config_dbg_show = starfive_pinconf_dbg_show, + .is_generic = true, +}; + +static struct pinctrl_desc starfive_desc = { + .name = DRIVER_NAME, + .pins = starfive_pins, + .npins = ARRAY_SIZE(starfive_pins), + .pctlops = &starfive_pinctrl_ops, + .pmxops = &starfive_pinmux_ops, + .confops = &starfive_pinconf_ops, + .owner = THIS_MODULE, + .num_custom_params = ARRAY_SIZE(starfive_pinconf_custom_params), + .custom_params = starfive_pinconf_custom_params, + .custom_conf_items = starfive_pinconf_custom_conf_items, +}; + +static int starfive_gpio_request(struct gpio_chip *gc, unsigned int gpio) +{ + return pinctrl_gpio_request(gc->base + gpio); +} + +static void starfive_gpio_free(struct gpio_chip *gc, unsigned int gpio) +{ + pinctrl_gpio_free(gc->base + gpio); +} + +static int starfive_gpio_get_direction(struct gpio_chip *gc, unsigned int gpio) +{ + struct starfive_pinctrl *sfp = container_of(gc, struct starfive_pinctrl, gc); + void __iomem *doen = sfp->base + GPON_DOEN_CFG + 8 * gpio; + + if (readl_relaxed(doen) == GPO_ENABLE) + return GPIO_LINE_DIRECTION_OUT; + + return GPIO_LINE_DIRECTION_IN; +} + +static int starfive_gpio_direction_input(struct gpio_chip *gc, + unsigned int gpio) +{ + struct starfive_pinctrl *sfp = container_of(gc, struct starfive_pinctrl, gc); + void __iomem *doen = sfp->base + GPON_DOEN_CFG + 8 * gpio; + unsigned long flags; + + /* enable input and schmitt trigger */ + starfive_padctl_rmw(sfp, starfive_gpio_to_pin(sfp, gpio), + PAD_INPUT_ENABLE | PAD_INPUT_SCHMITT_ENABLE, + PAD_INPUT_ENABLE | PAD_INPUT_SCHMITT_ENABLE); + + raw_spin_lock_irqsave(&sfp->lock, flags); + writel_relaxed(GPO_DISABLE, doen); + raw_spin_unlock_irqrestore(&sfp->lock, flags); + return 0; +} + +static int starfive_gpio_direction_output(struct gpio_chip *gc, + unsigned int gpio, int value) +{ + struct starfive_pinctrl *sfp = container_of(gc, struct starfive_pinctrl, gc); + void __iomem *dout = sfp->base + GPON_DOUT_CFG + 8 * gpio; + void __iomem *doen = sfp->base + GPON_DOEN_CFG + 8 * gpio; + unsigned long flags; + + raw_spin_lock_irqsave(&sfp->lock, flags); + writel_relaxed(value, dout); + writel_relaxed(GPO_ENABLE, doen); + raw_spin_unlock_irqrestore(&sfp->lock, flags); + + /* disable input, schmitt trigger and bias */ + starfive_padctl_rmw(sfp, starfive_gpio_to_pin(sfp, gpio), + PAD_BIAS_MASK | PAD_INPUT_ENABLE | PAD_INPUT_SCHMITT_ENABLE, + PAD_BIAS_DISABLE); + + return 0; +} + +static int starfive_gpio_get(struct gpio_chip *gc, unsigned int gpio) +{ + struct starfive_pinctrl *sfp = container_of(gc, struct starfive_pinctrl, gc); + void __iomem *din = sfp->base + GPIODIN + 4 * (gpio / 32); + + return !!(readl_relaxed(din) & BIT(gpio % 32)); +} + +static void starfive_gpio_set(struct gpio_chip *gc, unsigned int gpio, + int value) +{ + struct starfive_pinctrl *sfp = container_of(gc, struct starfive_pinctrl, gc); + void __iomem *dout = sfp->base + GPON_DOUT_CFG + 8 * gpio; + unsigned long flags; + + raw_spin_lock_irqsave(&sfp->lock, flags); + writel_relaxed(value, dout); + raw_spin_unlock_irqrestore(&sfp->lock, flags); +} + +static int starfive_gpio_set_config(struct gpio_chip *gc, unsigned int gpio, + unsigned long config) +{ + struct starfive_pinctrl *sfp = container_of(gc, struct starfive_pinctrl, gc); + u32 arg = pinconf_to_config_argument(config); + u16 value; + u16 mask; + + switch (pinconf_to_config_param(config)) { + case PIN_CONFIG_BIAS_DISABLE: + mask = PAD_BIAS_MASK; + value = PAD_BIAS_DISABLE; + break; + case PIN_CONFIG_BIAS_PULL_DOWN: + if (arg == 0) + return -ENOTSUPP; + mask = PAD_BIAS_MASK; + value = PAD_BIAS_PULL_DOWN; + break; + case PIN_CONFIG_BIAS_PULL_UP: + if (arg == 0) + return -ENOTSUPP; + mask = PAD_BIAS_MASK; + value = 0; + break; + case PIN_CONFIG_DRIVE_PUSH_PULL: + return 0; + case PIN_CONFIG_INPUT_ENABLE: + mask = PAD_INPUT_ENABLE; + value = arg ? PAD_INPUT_ENABLE : 0; + break; + case PIN_CONFIG_INPUT_SCHMITT_ENABLE: + mask = PAD_INPUT_SCHMITT_ENABLE; + value = arg ? PAD_INPUT_SCHMITT_ENABLE : 0; + break; + default: + return -ENOTSUPP; + }; + + starfive_padctl_rmw(sfp, starfive_gpio_to_pin(sfp, gpio), mask, value); + return 0; +} + +static int starfive_gpio_add_pin_ranges(struct gpio_chip *gc) +{ + struct starfive_pinctrl *sfp = container_of(gc, struct starfive_pinctrl, gc); + + sfp->gpios.name = sfp->gc.label; + sfp->gpios.base = sfp->gc.base; + /* + * sfp->gpios.pin_base depends on the chosen signal group + * and is set in starfive_probe() + */ + sfp->gpios.npins = NR_GPIOS; + sfp->gpios.gc = &sfp->gc; + pinctrl_add_gpio_range(sfp->pctl, &sfp->gpios); + return 0; +} + +static void starfive_irq_ack(struct irq_data *d) +{ + struct starfive_pinctrl *sfp = starfive_from_irq_data(d); + irq_hw_number_t gpio = irqd_to_hwirq(d); + void __iomem *ic = sfp->base + GPIOIC + 4 * (gpio / 32); + u32 mask = BIT(gpio % 32); + unsigned long flags; + + raw_spin_lock_irqsave(&sfp->lock, flags); + writel_relaxed(mask, ic); + raw_spin_unlock_irqrestore(&sfp->lock, flags); +} + +static void starfive_irq_mask(struct irq_data *d) +{ + struct starfive_pinctrl *sfp = starfive_from_irq_data(d); + irq_hw_number_t gpio = irqd_to_hwirq(d); + void __iomem *ie = sfp->base + GPIOIE + 4 * (gpio / 32); + u32 mask = BIT(gpio % 32); + unsigned long flags; + u32 value; + + raw_spin_lock_irqsave(&sfp->lock, flags); + value = readl_relaxed(ie) & ~mask; + writel_relaxed(value, ie); + raw_spin_unlock_irqrestore(&sfp->lock, flags); +} + +static void starfive_irq_mask_ack(struct irq_data *d) +{ + struct starfive_pinctrl *sfp = starfive_from_irq_data(d); + irq_hw_number_t gpio = irqd_to_hwirq(d); + void __iomem *ie = sfp->base + GPIOIE + 4 * (gpio / 32); + void __iomem *ic = sfp->base + GPIOIC + 4 * (gpio / 32); + u32 mask = BIT(gpio % 32); + unsigned long flags; + u32 value; + + raw_spin_lock_irqsave(&sfp->lock, flags); + value = readl_relaxed(ie) & ~mask; + writel_relaxed(value, ie); + writel_relaxed(mask, ic); + raw_spin_unlock_irqrestore(&sfp->lock, flags); +} + +static void starfive_irq_unmask(struct irq_data *d) +{ + struct starfive_pinctrl *sfp = starfive_from_irq_data(d); + irq_hw_number_t gpio = irqd_to_hwirq(d); + void __iomem *ie = sfp->base + GPIOIE + 4 * (gpio / 32); + u32 mask = BIT(gpio % 32); + unsigned long flags; + u32 value; + + raw_spin_lock_irqsave(&sfp->lock, flags); + value = readl_relaxed(ie) | mask; + writel_relaxed(value, ie); + raw_spin_unlock_irqrestore(&sfp->lock, flags); +} + +static int starfive_irq_set_type(struct irq_data *d, unsigned int trigger) +{ + struct starfive_pinctrl *sfp = starfive_from_irq_data(d); + irq_hw_number_t gpio = irqd_to_hwirq(d); + void __iomem *base = sfp->base + 4 * (gpio / 32); + u32 mask = BIT(gpio % 32); + u32 irq_type, edge_both, polarity; + unsigned long flags; + + switch (trigger) { + case IRQ_TYPE_EDGE_RISING: + irq_type = mask; /* 1: edge triggered */ + edge_both = 0; /* 0: single edge */ + polarity = mask; /* 1: rising edge */ + break; + case IRQ_TYPE_EDGE_FALLING: + irq_type = mask; /* 1: edge triggered */ + edge_both = 0; /* 0: single edge */ + polarity = 0; /* 0: falling edge */ + break; + case IRQ_TYPE_EDGE_BOTH: + irq_type = mask; /* 1: edge triggered */ + edge_both = mask; /* 1: both edges */ + polarity = 0; /* 0: ignored */ + break; + case IRQ_TYPE_LEVEL_HIGH: + irq_type = 0; /* 0: level triggered */ + edge_both = 0; /* 0: ignored */ + polarity = mask; /* 1: high level */ + break; + case IRQ_TYPE_LEVEL_LOW: + irq_type = 0; /* 0: level triggered */ + edge_both = 0; /* 0: ignored */ + polarity = 0; /* 0: low level */ + break; + default: + return -EINVAL; + } + + if (trigger & IRQ_TYPE_EDGE_BOTH) + irq_set_handler_locked(d, handle_edge_irq); + else + irq_set_handler_locked(d, handle_level_irq); + + raw_spin_lock_irqsave(&sfp->lock, flags); + irq_type |= readl_relaxed(base + GPIOIS) & ~mask; + writel_relaxed(irq_type, base + GPIOIS); + edge_both |= readl_relaxed(base + GPIOIBE) & ~mask; + writel_relaxed(edge_both, base + GPIOIBE); + polarity |= readl_relaxed(base + GPIOIEV) & ~mask; + writel_relaxed(polarity, base + GPIOIEV); + raw_spin_unlock_irqrestore(&sfp->lock, flags); + return 0; +} + +static struct irq_chip starfive_irq_chip = { + .irq_ack = starfive_irq_ack, + .irq_mask = starfive_irq_mask, + .irq_mask_ack = starfive_irq_mask_ack, + .irq_unmask = starfive_irq_unmask, + .irq_set_type = starfive_irq_set_type, + .flags = IRQCHIP_SET_TYPE_MASKED, +}; + +static void starfive_gpio_irq_handler(struct irq_desc *desc) +{ + struct starfive_pinctrl *sfp = starfive_from_irq_desc(desc); + struct irq_chip *chip = irq_desc_get_chip(desc); + unsigned long mis; + unsigned int pin; + + chained_irq_enter(chip, desc); + + mis = readl_relaxed(sfp->base + GPIOMIS + 0); + for_each_set_bit(pin, &mis, 32) + generic_handle_domain_irq(sfp->gc.irq.domain, pin); + + mis = readl_relaxed(sfp->base + GPIOMIS + 4); + for_each_set_bit(pin, &mis, 32) + generic_handle_domain_irq(sfp->gc.irq.domain, pin + 32); + + chained_irq_exit(chip, desc); +} + +static int starfive_gpio_init_hw(struct gpio_chip *gc) +{ + struct starfive_pinctrl *sfp = container_of(gc, struct starfive_pinctrl, gc); + + /* mask all GPIO interrupts */ + writel(0, sfp->base + GPIOIE + 0); + writel(0, sfp->base + GPIOIE + 4); + /* clear edge interrupt flags */ + writel(~0U, sfp->base + GPIOIC + 0); + writel(~0U, sfp->base + GPIOIC + 4); + /* enable GPIO interrupts */ + writel(1, sfp->base + GPIOEN); + return 0; +} + +static void starfive_disable_clock(void *data) +{ + clk_disable_unprepare(data); +} + +static int starfive_probe(struct platform_device *pdev) +{ + struct device *dev = &pdev->dev; + struct starfive_pinctrl *sfp; + struct reset_control *rst; + struct clk *clk; + u32 value; + int ret; + + sfp = devm_kzalloc(dev, sizeof(*sfp), GFP_KERNEL); + if (!sfp) + return -ENOMEM; + + sfp->base = devm_platform_ioremap_resource_byname(pdev, "gpio"); + if (IS_ERR(sfp->base)) + return PTR_ERR(sfp->base); + + sfp->padctl = devm_platform_ioremap_resource_byname(pdev, "padctl"); + if (IS_ERR(sfp->padctl)) + return PTR_ERR(sfp->padctl); + + clk = devm_clk_get(dev, NULL); + if (IS_ERR(clk)) + return dev_err_probe(dev, PTR_ERR(clk), "could not get clock\n"); + + rst = devm_reset_control_get_exclusive(dev, NULL); + if (IS_ERR(rst)) + return dev_err_probe(dev, PTR_ERR(rst), "could not get reset\n"); + + ret = clk_prepare_enable(clk); + if (ret) + return dev_err_probe(dev, ret, "could not enable clock\n"); + + ret = devm_add_action_or_reset(dev, starfive_disable_clock, clk); + if (ret) + return ret; + + /* + * We don't want to assert reset and risk undoing pin muxing for the + * early boot serial console, but let's make sure the reset line is + * deasserted in case someone runs a really minimal bootloader. + */ + ret = reset_control_deassert(rst); + if (ret) + return dev_err_probe(dev, ret, "could not deassert reset\n"); + + platform_set_drvdata(pdev, sfp); + sfp->gc.parent = dev; + raw_spin_lock_init(&sfp->lock); + + ret = devm_pinctrl_register_and_init(dev, &starfive_desc, sfp, &sfp->pctl); + if (ret) + return dev_err_probe(dev, ret, "could not register pinctrl driver\n"); + + if (!of_property_read_u32(dev->of_node, "starfive,signal-group", &value)) { + if (value > 6) + return dev_err_probe(dev, -EINVAL, "invalid signal group %u\n", value); + writel(value, sfp->padctl + IO_PADSHARE_SEL); + } + + value = readl(sfp->padctl + IO_PADSHARE_SEL); + switch (value) { + case 0: + sfp->gpios.pin_base = PAD_INVALID_GPIO; + goto out_pinctrl_enable; + case 1: + sfp->gpios.pin_base = PAD_GPIO(0); + break; + case 2: + sfp->gpios.pin_base = PAD_FUNC_SHARE(72); + break; + case 3: + sfp->gpios.pin_base = PAD_FUNC_SHARE(70); + break; + case 4: case 5: case 6: + sfp->gpios.pin_base = PAD_FUNC_SHARE(0); + break; + default: + return dev_err_probe(dev, -EINVAL, "invalid signal group %u\n", value); + } + + sfp->gc.label = dev_name(dev); + sfp->gc.owner = THIS_MODULE; + sfp->gc.request = starfive_gpio_request; + sfp->gc.free = starfive_gpio_free; + sfp->gc.get_direction = starfive_gpio_get_direction; + sfp->gc.direction_input = starfive_gpio_direction_input; + sfp->gc.direction_output = starfive_gpio_direction_output; + sfp->gc.get = starfive_gpio_get; + sfp->gc.set = starfive_gpio_set; + sfp->gc.set_config = starfive_gpio_set_config; + sfp->gc.add_pin_ranges = starfive_gpio_add_pin_ranges; + sfp->gc.base = -1; + sfp->gc.ngpio = NR_GPIOS; + + starfive_irq_chip.parent_device = dev; + starfive_irq_chip.name = sfp->gc.label; + + sfp->gc.irq.chip = &starfive_irq_chip; + sfp->gc.irq.parent_handler = starfive_gpio_irq_handler; + sfp->gc.irq.num_parents = 1; + sfp->gc.irq.parents = devm_kcalloc(dev, sfp->gc.irq.num_parents, + sizeof(*sfp->gc.irq.parents), GFP_KERNEL); + if (!sfp->gc.irq.parents) + return -ENOMEM; + sfp->gc.irq.default_type = IRQ_TYPE_NONE; + sfp->gc.irq.handler = handle_bad_irq; + sfp->gc.irq.init_hw = starfive_gpio_init_hw; + + ret = platform_get_irq(pdev, 0); + if (ret < 0) + return ret; + sfp->gc.irq.parents[0] = ret; + + ret = devm_gpiochip_add_data(dev, &sfp->gc, sfp); + if (ret) + return dev_err_probe(dev, ret, "could not register gpiochip\n"); + +out_pinctrl_enable: + return pinctrl_enable(sfp->pctl); +} + +static const struct of_device_id starfive_of_match[] = { + { .compatible = "starfive,jh7100-pinctrl" }, + { /* sentinel */ } +}; +MODULE_DEVICE_TABLE(of, starfive_of_match); + +static struct platform_driver starfive_pinctrl_driver = { + .probe = starfive_probe, + .driver = { + .name = DRIVER_NAME, + .of_match_table = starfive_of_match, + }, +}; +module_platform_driver(starfive_pinctrl_driver); + +MODULE_DESCRIPTION("Pinctrl driver for StarFive SoCs"); +MODULE_AUTHOR("Emil Renner Berthing <kernel@esmil.dk>"); +MODULE_LICENSE("GPL v2"); diff --git a/drivers/reset/Kconfig b/drivers/reset/Kconfig index 85024eb1d2ea..6f8ba0ddc05f 100644 --- a/drivers/reset/Kconfig +++ b/drivers/reset/Kconfig @@ -224,6 +224,13 @@ config RESET_SOCFPGA This enables the reset driver for the SoCFPGA ARMv7 platforms. This driver gets initialized early during platform init calls. +config RESET_STARFIVE_JH7100 + bool "StarFive JH7100 Reset Driver" + depends on SOC_STARFIVE || COMPILE_TEST + default SOC_STARFIVE + help + This enables the reset controller driver for the StarFive JH7100 SoC. + config RESET_SUNXI bool "Allwinner SoCs Reset Driver" if COMPILE_TEST && !ARCH_SUNXI default ARCH_SUNXI diff --git a/drivers/reset/Makefile b/drivers/reset/Makefile index 21d46d8869ff..bd0a97be18b5 100644 --- a/drivers/reset/Makefile +++ b/drivers/reset/Makefile @@ -29,6 +29,7 @@ obj-$(CONFIG_RESET_RZG2L_USBPHY_CTRL) += reset-rzg2l-usbphy-ctrl.o obj-$(CONFIG_RESET_SCMI) += reset-scmi.o obj-$(CONFIG_RESET_SIMPLE) += reset-simple.o obj-$(CONFIG_RESET_SOCFPGA) += reset-socfpga.o +obj-$(CONFIG_RESET_STARFIVE_JH7100) += reset-starfive-jh7100.o obj-$(CONFIG_RESET_SUNXI) += reset-sunxi.o obj-$(CONFIG_RESET_TI_SCI) += reset-ti-sci.o obj-$(CONFIG_RESET_TI_SYSCON) += reset-ti-syscon.o diff --git a/drivers/reset/reset-starfive-jh7100.c b/drivers/reset/reset-starfive-jh7100.c new file mode 100644 index 000000000000..fc44b2fb3e03 --- /dev/null +++ b/drivers/reset/reset-starfive-jh7100.c @@ -0,0 +1,173 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * Reset driver for the StarFive JH7100 SoC + * + * Copyright (C) 2021 Emil Renner Berthing <kernel@esmil.dk> + */ + +#include <linux/bitmap.h> +#include <linux/io.h> +#include <linux/io-64-nonatomic-lo-hi.h> +#include <linux/iopoll.h> +#include <linux/mod_devicetable.h> +#include <linux/platform_device.h> +#include <linux/reset-controller.h> +#include <linux/spinlock.h> + +#include <dt-bindings/reset/starfive-jh7100.h> + +/* register offsets */ +#define JH7100_RESET_ASSERT0 0x00 +#define JH7100_RESET_ASSERT1 0x04 +#define JH7100_RESET_ASSERT2 0x08 +#define JH7100_RESET_ASSERT3 0x0c +#define JH7100_RESET_STATUS0 0x10 +#define JH7100_RESET_STATUS1 0x14 +#define JH7100_RESET_STATUS2 0x18 +#define JH7100_RESET_STATUS3 0x1c + +/* + * Writing a 1 to the n'th bit of the m'th ASSERT register asserts + * line 32m + n, and writing a 0 deasserts the same line. + * Most reset lines have their status inverted so a 0 bit in the STATUS + * register means the line is asserted and a 1 means it's deasserted. A few + * lines don't though, so store the expected value of the status registers when + * all lines are asserted. + */ +static const u64 jh7100_reset_asserted[2] = { + /* STATUS0 */ + BIT_ULL_MASK(JH7100_RST_U74) | + BIT_ULL_MASK(JH7100_RST_VP6_DRESET) | + BIT_ULL_MASK(JH7100_RST_VP6_BRESET) | + /* STATUS1 */ + BIT_ULL_MASK(JH7100_RST_HIFI4_DRESET) | + BIT_ULL_MASK(JH7100_RST_HIFI4_BRESET), + /* STATUS2 */ + BIT_ULL_MASK(JH7100_RST_E24) | + /* STATUS3 */ + 0, +}; + +struct jh7100_reset { + struct reset_controller_dev rcdev; + /* protect registers against concurrent read-modify-write */ + spinlock_t lock; + void __iomem *base; +}; + +static inline struct jh7100_reset * +jh7100_reset_from(struct reset_controller_dev *rcdev) +{ + return container_of(rcdev, struct jh7100_reset, rcdev); +} + +static int jh7100_reset_update(struct reset_controller_dev *rcdev, + unsigned long id, bool assert) +{ + struct jh7100_reset *data = jh7100_reset_from(rcdev); + unsigned long offset = BIT_ULL_WORD(id); + u64 mask = BIT_ULL_MASK(id); + void __iomem *reg_assert = data->base + JH7100_RESET_ASSERT0 + offset * sizeof(u64); + void __iomem *reg_status = data->base + JH7100_RESET_STATUS0 + offset * sizeof(u64); + u64 done = jh7100_reset_asserted[offset] & mask; + u64 value; + unsigned long flags; + int ret; + + if (!assert) + done ^= mask; + + spin_lock_irqsave(&data->lock, flags); + + value = readq(reg_assert); + if (assert) + value |= mask; + else + value &= ~mask; + writeq(value, reg_assert); + + /* if the associated clock is gated, deasserting might otherwise hang forever */ + ret = readq_poll_timeout_atomic(reg_status, value, (value & mask) == done, 0, 1000); + + spin_unlock_irqrestore(&data->lock, flags); + return ret; +} + +static int jh7100_reset_assert(struct reset_controller_dev *rcdev, + unsigned long id) +{ + return jh7100_reset_update(rcdev, id, true); +} + +static int jh7100_reset_deassert(struct reset_controller_dev *rcdev, + unsigned long id) +{ + return jh7100_reset_update(rcdev, id, false); +} + +static int jh7100_reset_reset(struct reset_controller_dev *rcdev, + unsigned long id) +{ + int ret; + + ret = jh7100_reset_assert(rcdev, id); + if (ret) + return ret; + + return jh7100_reset_deassert(rcdev, id); +} + +static int jh7100_reset_status(struct reset_controller_dev *rcdev, + unsigned long id) +{ + struct jh7100_reset *data = jh7100_reset_from(rcdev); + unsigned long offset = BIT_ULL_WORD(id); + u64 mask = BIT_ULL_MASK(id); + void __iomem *reg_status = data->base + JH7100_RESET_STATUS0 + offset * sizeof(u64); + u64 value = readq(reg_status); + + return !((value ^ jh7100_reset_asserted[offset]) & mask); +} + +static const struct reset_control_ops jh7100_reset_ops = { + .assert = jh7100_reset_assert, + .deassert = jh7100_reset_deassert, + .reset = jh7100_reset_reset, + .status = jh7100_reset_status, +}; + +static int __init jh7100_reset_probe(struct platform_device *pdev) +{ + struct jh7100_reset *data; + + data = devm_kzalloc(&pdev->dev, sizeof(*data), GFP_KERNEL); + if (!data) + return -ENOMEM; + + data->base = devm_platform_ioremap_resource(pdev, 0); + if (IS_ERR(data->base)) + return PTR_ERR(data->base); + + data->rcdev.ops = &jh7100_reset_ops; + data->rcdev.owner = THIS_MODULE; + data->rcdev.nr_resets = JH7100_RSTN_END; + data->rcdev.dev = &pdev->dev; + data->rcdev.of_node = pdev->dev.of_node; + spin_lock_init(&data->lock); + + return devm_reset_controller_register(&pdev->dev, &data->rcdev); +} + +static const struct of_device_id jh7100_reset_dt_ids[] = { + { .compatible = "starfive,jh7100-reset" }, + { /* sentinel */ } +}; + +static struct platform_driver jh7100_reset_driver = { + .driver = { + .name = "jh7100-reset", + .of_match_table = jh7100_reset_dt_ids, + .suppress_bind_attrs = true, + }, +}; +builtin_platform_driver_probe(jh7100_reset_driver, jh7100_reset_probe); diff --git a/drivers/tty/serial/8250/8250_dw.c b/drivers/tty/serial/8250/8250_dw.c index 53f57c3b9f42..1769808031c5 100644 --- a/drivers/tty/serial/8250/8250_dw.c +++ b/drivers/tty/serial/8250/8250_dw.c @@ -414,6 +414,8 @@ static void dw8250_quirks(struct uart_port *p, struct dw8250_data *data) if (of_device_is_compatible(np, "marvell,armada-38x-uart")) p->serial_out = dw8250_serial_out38x; + if (of_device_is_compatible(np, "starfive,jh7100-uart")) + p->set_termios = dw8250_do_set_termios; } else if (acpi_dev_present("APMC0D08", NULL, -1)) { p->iotype = UPIO_MEM32; @@ -696,6 +698,7 @@ static const struct of_device_id dw8250_of_match[] = { { .compatible = "cavium,octeon-3860-uart" }, { .compatible = "marvell,armada-38x-uart" }, { .compatible = "renesas,rzn1-uart" }, + { .compatible = "starfive,jh7100-uart" }, { /* Sentinel */ } }; MODULE_DEVICE_TABLE(of, dw8250_of_match); |