This patch adds the basic clocks support for the Allwinner A31 (sun6i) processor. This code will not been compiled until the build is hooked up in a later patch. It has been split out to keep the patches manageable.
This includes changes from the following commits from u-boot-sunxi:
a92051b ARM: sunxi: Add sun6i clock controller structure 1f72c6f ARM: sun6i: Setup the UART0 clocks 5f2e712 ARM: sunxi: Enable pll6 by default on all models 2be2f2a ARM: sunxi-mmc: Add mmc support for sun6i / A31 12e1633 ARM: sun6i: Add initial clock setup for SPL 1a9c9c6 ARM: sunxi: Split clock code into common, sun4i and sun6i code 0b194ee ARM: sun6i: Properly setup the PLL LDO in clock_init_safe b54c626 sunxi: avoid sr32 for APB1 clock setup. 68fe29c sunxi: remove magic numbers from clock_get_pll{5,6} c89867d sunxi: clocks: clock_get_pll5 prototype and coding style 501ab1e ARM: sunxi: Fix sun6i PLL6 settings 37f669b ARM: sunxi: Fix macro names for mmc and uart reset offsets 61de1e6 ARM: sunxi: Correct comment for MBUS1 register in sun6i clock definitions
Signed-off-by: Maxime Ripard maxime.ripard@free-electrons.com Signed-off-by: Ian Campbell ijc@hellion.org.uk Signed-off-by: Hans de Goede hdegoede@redhat.com [wens@csie.org: styling fixes reported by checkpatch.pl] [wens@csie.org: drop unsupported SPL code block and unused gpio.h header] Signed-off-by: Chen-Yu Tsai wens@csie.org Cc: Tom Cubie Mr.hipboi@gmail.com Acked-by: Ian Campbell ijc@hellion.org.uk --- arch/arm/cpu/armv7/sunxi/Makefile | 1 + arch/arm/cpu/armv7/sunxi/clock_sun6i.c | 70 +++++++++ arch/arm/include/asm/arch-sunxi/clock.h | 4 + arch/arm/include/asm/arch-sunxi/clock_sun6i.h | 205 ++++++++++++++++++++++++++ 4 files changed, 280 insertions(+) create mode 100644 arch/arm/cpu/armv7/sunxi/clock_sun6i.c create mode 100644 arch/arm/include/asm/arch-sunxi/clock_sun6i.h
diff --git a/arch/arm/cpu/armv7/sunxi/Makefile b/arch/arm/cpu/armv7/sunxi/Makefile index f0473d2..2a42dca 100644 --- a/arch/arm/cpu/armv7/sunxi/Makefile +++ b/arch/arm/cpu/armv7/sunxi/Makefile @@ -14,6 +14,7 @@ obj-y += pinmux.o obj-$(CONFIG_SUN6I) += prcm.o obj-$(CONFIG_SUN4I) += clock_sun4i.o obj-$(CONFIG_SUN5I) += clock_sun4i.o +obj-$(CONFIG_SUN6I) += clock_sun6i.o obj-$(CONFIG_SUN7I) += clock_sun4i.o
ifndef CONFIG_SPL_BUILD diff --git a/arch/arm/cpu/armv7/sunxi/clock_sun6i.c b/arch/arm/cpu/armv7/sunxi/clock_sun6i.c new file mode 100644 index 0000000..8387b93 --- /dev/null +++ b/arch/arm/cpu/armv7/sunxi/clock_sun6i.c @@ -0,0 +1,70 @@ +/* + * sun6i specific clock code + * + * (C) Copyright 2007-2012 + * Allwinner Technology Co., Ltd. <www.allwinnertech.com> + * Tom Cubie tangliang@allwinnertech.com + * + * (C) Copyright 2013 Luke Kenneth Casson Leighton lkcl@lkcl.net + * + * SPDX-License-Identifier: GPL-2.0+ + */ + +#include <common.h> +#include <asm/io.h> +#include <asm/arch/clock.h> +#include <asm/arch/sys_proto.h> + +void clock_init_uart(void) +{ + struct sunxi_ccm_reg *const ccm = + (struct sunxi_ccm_reg *)SUNXI_CCM_BASE; + + /* uart clock source is apb2 */ + writel(APB2_CLK_SRC_OSC24M| + APB2_CLK_RATE_N_1| + APB2_CLK_RATE_M(1), + &ccm->apb2_div); + + /* open the clock for uart */ + setbits_le32(&ccm->apb2_gate, + CLK_GATE_OPEN << (APB2_GATE_UART_SHIFT + + CONFIG_CONS_INDEX - 1)); + + /* deassert uart reset */ + setbits_le32(&ccm->apb2_reset_cfg, + 1 << (APB2_RESET_UART_SHIFT + + CONFIG_CONS_INDEX - 1)); + + /* Dup with clock_init_safe(), drop once sun6i SPL support lands */ + writel(PLL6_CFG_DEFAULT, &ccm->pll6_cfg); +} + +int clock_twi_onoff(int port, int state) +{ + struct sunxi_ccm_reg *const ccm = + (struct sunxi_ccm_reg *)SUNXI_CCM_BASE; + + if (port > 3) + return -1; + + /* set the apb clock gate for twi */ + if (state) + setbits_le32(&ccm->apb2_gate, + CLK_GATE_OPEN << (APB2_GATE_TWI_SHIFT+port)); + else + clrbits_le32(&ccm->apb2_gate, + CLK_GATE_OPEN << (APB2_GATE_TWI_SHIFT+port)); + + return 0; +} + +unsigned int clock_get_pll6(void) +{ + struct sunxi_ccm_reg *const ccm = + (struct sunxi_ccm_reg *)SUNXI_CCM_BASE; + uint32_t rval = readl(&ccm->pll6_cfg); + int n = ((rval & CCM_PLL6_CTRL_N_MASK) >> CCM_PLL6_CTRL_N_SHIFT) + 1; + int k = ((rval & CCM_PLL6_CTRL_K_MASK) >> CCM_PLL6_CTRL_K_SHIFT) + 1; + return 24000000 * n * k / 2; +} diff --git a/arch/arm/include/asm/arch-sunxi/clock.h b/arch/arm/include/asm/arch-sunxi/clock.h index 5669f39..8f5d860 100644 --- a/arch/arm/include/asm/arch-sunxi/clock.h +++ b/arch/arm/include/asm/arch-sunxi/clock.h @@ -15,7 +15,11 @@ #define CLK_GATE_CLOSE 0x0
/* clock control module regs definition */ +#ifdef CONFIG_SUN6I +#include <asm/arch/clock_sun6i.h> +#else #include <asm/arch/clock_sun4i.h> +#endif
#ifndef __ASSEMBLY__ int clock_init(void); diff --git a/arch/arm/include/asm/arch-sunxi/clock_sun6i.h b/arch/arm/include/asm/arch-sunxi/clock_sun6i.h new file mode 100644 index 0000000..1397b35 --- /dev/null +++ b/arch/arm/include/asm/arch-sunxi/clock_sun6i.h @@ -0,0 +1,205 @@ +/* + * sun6i clock register definitions + * + * (C) Copyright 2007-2011 + * Allwinner Technology Co., Ltd. <www.allwinnertech.com> + * Tom Cubie tangliang@allwinnertech.com + * + * SPDX-License-Identifier: GPL-2.0+ + */ + +#ifndef _SUNXI_CLOCK_SUN6I_H +#define _SUNXI_CLOCK_SUN6I_H + +struct sunxi_ccm_reg { + u32 pll1_cfg; /* 0x00 pll1 control */ + u32 reserved0; + u32 pll2_cfg; /* 0x08 pll2 control */ + u32 reserved1; + u32 pll3_cfg; /* 0x10 pll3 control */ + u32 reserved2; + u32 pll4_cfg; /* 0x18 pll4 control */ + u32 reserved3; + u32 pll5_cfg; /* 0x20 pll5 control */ + u32 reserved4; + u32 pll6_cfg; /* 0x28 pll6 control */ + u32 reserved5; + u32 pll7_cfg; /* 0x30 pll7 control */ + u32 reserved6; + u32 pll8_cfg; /* 0x38 pll8 control */ + u32 reserved7; + u32 mipi_pll_cfg; /* 0x40 MIPI pll control */ + u32 pll9_cfg; /* 0x44 pll9 control */ + u32 pll10_cfg; /* 0x48 pll10 control */ + u32 reserved8; + u32 cpu_axi_cfg; /* 0x50 CPU/AXI divide ratio */ + u32 ahb1_apb1_div; /* 0x54 AHB1/APB1 divide ratio */ + u32 apb2_div; /* 0x58 APB2 divide ratio */ + u32 axi_gate; /* 0x5c axi module clock gating */ + u32 ahb_gate0; /* 0x60 ahb module clock gating 0 */ + u32 ahb_gate1; /* 0x64 ahb module clock gating 1 */ + u32 apb1_gate; /* 0x68 apb1 module clock gating */ + u32 apb2_gate; /* 0x6c apb2 module clock gating */ + u32 reserved9[4]; + u32 nand0_clk_cfg; /* 0x80 nand0 clock control */ + u32 nand1_clk_cfg; /* 0x84 nand1 clock control */ + u32 sd0_clk_cfg; /* 0x88 sd0 clock control */ + u32 sd1_clk_cfg; /* 0x8c sd1 clock control */ + u32 sd2_clk_cfg; /* 0x90 sd2 clock control */ + u32 sd3_clk_cfg; /* 0x94 sd3 clock control */ + u32 ts_clk_cfg; /* 0x98 transport stream clock control */ + u32 ss_clk_cfg; /* 0x9c security system clock control */ + u32 spi0_clk_cfg; /* 0xa0 spi0 clock control */ + u32 spi1_clk_cfg; /* 0xa4 spi1 clock control */ + u32 spi2_clk_cfg; /* 0xa8 spi2 clock control */ + u32 spi3_clk_cfg; /* 0xac spi3 clock control */ + u32 i2s0_clk_cfg; /* 0xb0 I2S0 clock control*/ + u32 i2s1_clk_cfg; /* 0xb4 I2S1 clock control */ + u32 reserved10[2]; + u32 spdif_clk_cfg; /* 0xc0 SPDIF clock control */ + u32 reserved11[2]; + u32 usb_clk_cfg; /* 0xcc USB clock control */ + u32 gmac_clk_cfg; /* 0xd0 GMAC clock control */ + u32 reserved12[7]; + u32 mdfs_clk_cfg; /* 0xf0 MDFS clock control */ + u32 dram_clk_cfg; /* 0xf4 DRAM configuration clock control */ + u32 reserved13[2]; + u32 dram_clk_gate; /* 0x100 DRAM module gating */ + u32 be0_clk_cfg; /* 0x104 BE0 module clock */ + u32 be1_clk_cfg; /* 0x108 BE1 module clock */ + u32 fe0_clk_cfg; /* 0x10c FE0 module clock */ + u32 fe1_clk_cfg; /* 0x110 FE1 module clock */ + u32 mp_clk_cfg; /* 0x114 MP module clock */ + u32 lcd0_ch0_clk_cfg; /* 0x118 LCD0 CH0 module clock */ + u32 lcd1_ch0_clk_cfg; /* 0x11c LCD1 CH0 module clock */ + u32 reserved14[3]; + u32 lcd0_ch1_clk_cfg; /* 0x12c LCD0 CH1 module clock */ + u32 lcd1_ch1_clk_cfg; /* 0x130 LCD1 CH1 module clock */ + u32 csi0_clk_cfg; /* 0x134 CSI0 module clock */ + u32 csi1_clk_cfg; /* 0x138 CSI1 module clock */ + u32 ve_clk_cfg; /* 0x13c VE module clock */ + u32 adda_clk_cfg; /* 0x140 ADDA module clock */ + u32 avs_clk_cfg; /* 0x144 AVS module clock */ + u32 dmic_clk_cfg; /* 0x148 Digital Mic module clock*/ + u32 reserved15; + u32 hdmi_clk_cfg; /* 0x150 HDMI module clock */ + u32 ps_clk_cfg; /* 0x154 PS module clock */ + u32 mtc_clk_cfg; /* 0x158 MTC module clock */ + u32 mbus0_clk_cfg; /* 0x15c MBUS0 module clock */ + u32 mbus1_clk_cfg; /* 0x160 MBUS1 module clock */ + u32 reserved16; + u32 mipi_dsi_clk_cfg; /* 0x168 MIPI DSI clock control */ + u32 mipi_csi_clk_cfg; /* 0x16c MIPI CSI clock control */ + u32 reserved17[4]; + u32 iep_drc0_clk_cfg; /* 0x180 IEP DRC0 module clock */ + u32 iep_drc1_clk_cfg; /* 0x184 IEP DRC1 module clock */ + u32 iep_deu0_clk_cfg; /* 0x188 IEP DEU0 module clock */ + u32 iep_deu1_clk_cfg; /* 0x18c IEP DEU1 module clock */ + u32 reserved18[4]; + u32 gpu_core_clk_cfg; /* 0x1a0 GPU core clock config */ + u32 gpu_mem_clk_cfg; /* 0x1a4 GPU memory clock config */ + u32 gpu_hyd_clk_cfg; /* 0x1a0 GPU HYD clock config */ + u32 reserved19[21]; + u32 pll_lock; /* 0x200 PLL Lock Time */ + u32 pll1_lock; /* 0x204 PLL1 Lock Time */ + u32 reserved20[6]; + u32 pll1_bias_cfg; /* 0x220 PLL1 Bias config */ + u32 pll2_bias_cfg; /* 0x224 PLL2 Bias config */ + u32 pll3_bias_cfg; /* 0x228 PLL3 Bias config */ + u32 pll4_bias_cfg; /* 0x22c PLL4 Bias config */ + u32 pll5_bias_cfg; /* 0x230 PLL5 Bias config */ + u32 pll6_bias_cfg; /* 0x234 PLL6 Bias config */ + u32 pll7_bias_cfg; /* 0x238 PLL7 Bias config */ + u32 pll8_bias_cfg; /* 0x23c PLL8 Bias config */ + u32 mipi_bias_cfg; /* 0x240 MIPI Bias config */ + u32 pll9_bias_cfg; /* 0x244 PLL9 Bias config */ + u32 pll10_bias_cfg; /* 0x248 PLL10 Bias config */ + u32 reserved21[13]; + u32 pll1_pattern_cfg; /* 0x280 PLL1 Pattern config */ + u32 pll2_pattern_cfg; /* 0x284 PLL2 Pattern config */ + u32 pll3_pattern_cfg; /* 0x288 PLL3 Pattern config */ + u32 pll4_pattern_cfg; /* 0x28c PLL4 Pattern config */ + u32 pll5_pattern_cfg; /* 0x290 PLL5 Pattern config */ + u32 pll6_pattern_cfg; /* 0x294 PLL6 Pattern config */ + u32 pll7_pattern_cfg; /* 0x298 PLL7 Pattern config */ + u32 pll8_pattern_cfg; /* 0x29c PLL8 Pattern config */ + u32 mipi_pattern_cfg; /* 0x2a0 MIPI Pattern config */ + u32 pll9_pattern_cfg; /* 0x2a4 PLL9 Pattern config */ + u32 pll10_pattern_cfg; /* 0x2a8 PLL10 Pattern config */ + u32 reserved22[5]; + u32 ahb_reset0_cfg; /* 0x2c0 AHB1 Reset 0 config */ + u32 ahb_reset1_cfg; /* 0x2c4 AHB1 Reset 1 config */ + u32 ahb_reset2_cfg; /* 0x2c8 AHB1 Reset 2 config */ + u32 reserved23; + u32 apb1_reset_cfg; /* 0x2d0 APB1 Reset config */ + u32 reserved24; + u32 apb2_reset_cfg; /* 0x2d8 APB2 Reset config */ +}; + +/* apb2 bit field */ +#define APB2_CLK_SRC_LOSC (0x0 << 24) +#define APB2_CLK_SRC_OSC24M (0x1 << 24) +#define APB2_CLK_SRC_PLL6 (0x2 << 24) +#define APB2_CLK_SRC_MASK (0x3 << 24) +#define APB2_CLK_RATE_N_1 (0x0 << 16) +#define APB2_CLK_RATE_N_2 (0x1 << 16) +#define APB2_CLK_RATE_N_4 (0x2 << 16) +#define APB2_CLK_RATE_N_8 (0x3 << 16) +#define APB2_CLK_RATE_N_MASK (3 << 16) +#define APB2_CLK_RATE_M(m) (((m)-1) << 0) +#define APB2_CLK_RATE_M_MASK (0x1f << 0) + +/* apb2 gate field */ +#define APB2_GATE_UART_SHIFT (16) +#define APB2_GATE_UART_MASK (0xff << APB2_GATE_UART_SHIFT) +#define APB2_GATE_TWI_SHIFT (0) +#define APB2_GATE_TWI_MASK (0xf << APB2_GATE_TWI_SHIFT) + +/* cpu_axi_cfg bits */ +#define AXI_DIV_SHIFT 0 +#define ATB_DIV_SHIFT 8 +#define CPU_CLK_SRC_SHIFT 16 + +#define AXI_DIV_1 0 +#define AXI_DIV_2 1 +#define AXI_DIV_3 2 +#define AXI_DIV_4 3 +#define ATB_DIV_1 0 +#define ATB_DIV_2 1 +#define ATB_DIV_4 2 +#define CPU_CLK_SRC_OSC24M 1 +#define CPU_CLK_SRC_PLL1 2 + +#define PLL1_CFG_DEFAULT 0x90011b21 + +#define PLL6_CFG_DEFAULT 0x90041811 + +#define CCM_PLL6_CTRL_N_SHIFT 8 +#define CCM_PLL6_CTRL_N_MASK (0x1f << CCM_PLL6_CTRL_N_SHIFT) +#define CCM_PLL6_CTRL_K_SHIFT 4 +#define CCM_PLL6_CTRL_K_MASK (0x3 << CCM_PLL6_CTRL_K_SHIFT) + +#define AHB_GATE_OFFSET_MMC3 11 +#define AHB_GATE_OFFSET_MMC2 10 +#define AHB_GATE_OFFSET_MMC1 9 +#define AHB_GATE_OFFSET_MMC0 8 +#define AHB_GATE_OFFSET_MMC(n) (AHB_GATE_OFFSET_MMC0 + (n)) + +#define CCM_MMC_CTRL_OSCM24 (0x0 << 24) +#define CCM_MMC_CTRL_PLL6 (0x1 << 24) + +#define CCM_MMC_CTRL_ENABLE (0x1 << 31) + +#define AHB_RESET_OFFSET_MMC3 11 +#define AHB_RESET_OFFSET_MMC2 10 +#define AHB_RESET_OFFSET_MMC1 9 +#define AHB_RESET_OFFSET_MMC0 8 +#define AHB_RESET_OFFSET_MMC(n) (AHB_RESET_OFFSET_MMC0 + (n)) + +/* apb2 reset */ +#define APB2_RESET_UART_SHIFT (16) +#define APB2_RESET_UART_MASK (0xff << APB2_RESET_UART_SHIFT) +#define APB2_RESET_TWI_SHIFT (0) +#define APB2_RESET_TWI_MASK (0xf << APB2_RESET_TWI_SHIFT) + +#endif /* _SUNXI_CLOCK_SUN6I_H */