First supported chip is APQ8016 (that is compatible with MSM8916). Drivers in SoC code: - Reset controller (PSHOLD) - Clock controller (very simple clock configuration for MMC and UART)
Signed-off-by: Mateusz Kulikowski mateusz.kulikowski@gmail.com Reviewed-by: Simon Glass sjg@chromium.org Tested-by: Simon Glass sjg@chromium.org ---
Changes in v3: None Changes in v2: - Rename DM_SPMI -> SPMI - Make MND divider comments more compact :) - p -> priv - Add reviewed-by - Reordered Kconfig to keep alphabetical order - Renamed reset_sandbox -> msm_reset (typo in reset.c)
Changes in v1: - Fix include order - Cleanup defines (added spaces for readibility) - Base address is integer to avoid casting - Use setbits_* family where possible - Drop unneded comments, added newlines where needed - Check return value of dev_get_addr - Add binding for apq8016 - Cleaned up divider calculation - Drop most of gpio.h (only empty file is needed)
arch/arm/Kconfig | 12 + arch/arm/Makefile | 1 + arch/arm/mach-snapdragon/Kconfig | 6 + arch/arm/mach-snapdragon/Makefile | 8 + arch/arm/mach-snapdragon/clock-apq8016.c | 262 +++++++++++++++++++++ arch/arm/mach-snapdragon/include/mach/gpio.h | 9 + .../mach-snapdragon/include/mach/sysmap-apq8016.h | 14 ++ arch/arm/mach-snapdragon/reset.c | 40 ++++ 8 files changed, 352 insertions(+) create mode 100644 arch/arm/mach-snapdragon/Kconfig create mode 100644 arch/arm/mach-snapdragon/Makefile create mode 100644 arch/arm/mach-snapdragon/clock-apq8016.c create mode 100644 arch/arm/mach-snapdragon/include/mach/gpio.h create mode 100644 arch/arm/mach-snapdragon/include/mach/sysmap-apq8016.h create mode 100644 arch/arm/mach-snapdragon/reset.c
diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig index 6e5544f..2cb96e2 100644 --- a/arch/arm/Kconfig +++ b/arch/arm/Kconfig @@ -504,6 +504,16 @@ config RMOBILE bool "Renesas ARM SoCs" select CPU_V7
+config ARCH_SNAPDRAGON + bool "Qualcomm Snapdragon SoCs" + select ARM64 + select DM + select DM_GPIO + select DM_SERIAL + select SPMI + select OF_CONTROL + select OF_SEPARATE + config ARCH_SOCFPGA bool "Altera SOCFPGA family" select CPU_V7 @@ -762,6 +772,8 @@ source "arch/arm/mach-rockchip/Kconfig"
source "arch/arm/mach-s5pc1xx/Kconfig"
+source "arch/arm/mach-snapdragon/Kconfig" + source "arch/arm/mach-socfpga/Kconfig"
source "arch/arm/mach-stm32/Kconfig" diff --git a/arch/arm/Makefile b/arch/arm/Makefile index 6defdfb..bb2666c 100644 --- a/arch/arm/Makefile +++ b/arch/arm/Makefile @@ -54,6 +54,7 @@ machine-$(CONFIG_ARCH_MVEBU) += mvebu # TODO: rename CONFIG_ORION5X -> CONFIG_ARCH_ORION5X machine-$(CONFIG_ORION5X) += orion5x machine-$(CONFIG_ARCH_S5PC1XX) += s5pc1xx +machine-$(CONFIG_ARCH_SNAPDRAGON) += snapdragon machine-$(CONFIG_ARCH_SOCFPGA) += socfpga machine-$(CONFIG_ARCH_ROCKCHIP) += rockchip machine-$(CONFIG_STM32) += stm32 diff --git a/arch/arm/mach-snapdragon/Kconfig b/arch/arm/mach-snapdragon/Kconfig new file mode 100644 index 0000000..156e733 --- /dev/null +++ b/arch/arm/mach-snapdragon/Kconfig @@ -0,0 +1,6 @@ +if ARCH_SNAPDRAGON + +config SYS_SOC + default "snapdragon" + +endif diff --git a/arch/arm/mach-snapdragon/Makefile b/arch/arm/mach-snapdragon/Makefile new file mode 100644 index 0000000..8e84705 --- /dev/null +++ b/arch/arm/mach-snapdragon/Makefile @@ -0,0 +1,8 @@ +# +# (C) Copyright 2015 Mateusz Kulikowski mateusz.kulikowski@gmail.com +# +# SPDX-License-Identifier: GPL-2.0+ +# + +obj-y += clock-apq8016.o +obj-y += reset.o diff --git a/arch/arm/mach-snapdragon/clock-apq8016.c b/arch/arm/mach-snapdragon/clock-apq8016.c new file mode 100644 index 0000000..d548d75 --- /dev/null +++ b/arch/arm/mach-snapdragon/clock-apq8016.c @@ -0,0 +1,262 @@ +/* + * Clock drivers for Qualcomm APQ8016 + * + * (C) Copyright 2015 Mateusz Kulikowski mateusz.kulikowski@gmail.com + * + * Based on Little Kernel driver, simplified + * + * SPDX-License-Identifier: BSD-3-Clause + */ + +#include <common.h> +#include <clk.h> +#include <dm.h> +#include <errno.h> +#include <asm/io.h> +#include <linux/bitops.h> + +/* GPLL0 clock control registers */ +#define GPLL0_STATUS 0x2101C +#define GPLL0_STATUS_ACTIVE BIT(17) + +#define APCS_GPLL_ENA_VOTE 0x45000 +#define APCS_GPLL_ENA_VOTE_GPLL0 BIT(0) + +/* vote reg for blsp1 clock */ +#define APCS_CLOCK_BRANCH_ENA_VOTE 0x45004 +#define APCS_CLOCK_BRANCH_ENA_VOTE_BLSP1 BIT(10) + +/* SDC(n) clock control registers; n=1,2 */ + +/* block control register */ +#define SDCC_BCR(n) ((n * 0x1000) + 0x41000) +/* cmd */ +#define SDCC_CMD_RCGR(n) ((n * 0x1000) + 0x41004) +/* cfg */ +#define SDCC_CFG_RCGR(n) ((n * 0x1000) + 0x41008) +/* m */ +#define SDCC_M(n) ((n * 0x1000) + 0x4100C) +/* n */ +#define SDCC_N(n) ((n * 0x1000) + 0x41010) +/* d */ +#define SDCC_D(n) ((n * 0x1000) + 0x41014) +/* branch control */ +#define SDCC_APPS_CBCR(n) ((n * 0x1000) + 0x41018) +#define SDCC_AHB_CBCR(n) ((n * 0x1000) + 0x4101C) + +/* BLSP1 AHB clock (root clock for BLSP) */ +#define BLSP1_AHB_CBCR 0x1008 + +/* Uart clock control registers */ +#define BLSP1_UART2_BCR 0x3028 +#define BLSP1_UART2_APPS_CBCR 0x302C +#define BLSP1_UART2_APPS_CMD_RCGR 0x3034 +#define BLSP1_UART2_APPS_CFG_RCGR 0x3038 +#define BLSP1_UART2_APPS_M 0x303C +#define BLSP1_UART2_APPS_N 0x3040 +#define BLSP1_UART2_APPS_D 0x3044 + +/* CBCR register fields */ +#define CBCR_BRANCH_ENABLE_BIT BIT(0) +#define CBCR_BRANCH_OFF_BIT BIT(31) + +struct msm_clk_priv { + phys_addr_t base; +}; + +/* Enable clock controlled by CBC soft macro */ +static void clk_enable_cbc(phys_addr_t cbcr) +{ + setbits_le32(cbcr, CBCR_BRANCH_ENABLE_BIT); + + while (readl(cbcr) & CBCR_BRANCH_OFF_BIT) + ; +} + +/* clock has 800MHz */ +static void clk_enable_gpll0(phys_addr_t base) +{ + if (readl(base + GPLL0_STATUS) & GPLL0_STATUS_ACTIVE) + return; /* clock already enabled */ + + setbits_le32(base + APCS_GPLL_ENA_VOTE, APCS_GPLL_ENA_VOTE_GPLL0); + + while ((readl(base + GPLL0_STATUS) & GPLL0_STATUS_ACTIVE) == 0) + ; +} + +#define APPS_CMD_RGCR_UPDATE BIT(0) + +/* Update clock command via CMD_RGCR */ +static void clk_bcr_update(phys_addr_t apps_cmd_rgcr) +{ + setbits_le32(apps_cmd_rgcr, APPS_CMD_RGCR_UPDATE); + + /* Wait for frequency to be updated. */ + while (readl(apps_cmd_rgcr) & APPS_CMD_RGCR_UPDATE) + ; +} + +struct bcr_regs { + uintptr_t cfg_rcgr; + uintptr_t cmd_rcgr; + uintptr_t M; + uintptr_t N; + uintptr_t D; +}; + +/* RCGR_CFG register fields */ +#define CFG_MODE_DUAL_EDGE (0x2 << 12) /* Counter mode */ + +/* sources */ +#define CFG_CLK_SRC_CXO (0 << 8) +#define CFG_CLK_SRC_GPLL0 (1 << 8) +#define CFG_CLK_SRC_MASK (7 << 8) + +/* Mask for supported fields */ +#define CFG_MASK 0x3FFF + +#define CFG_DIVIDER_MASK 0x1F + +/* root set rate for clocks with half integer and MND divider */ +static void clk_rcg_set_rate_mnd(phys_addr_t base, const struct bcr_regs *regs, + int div, int m, int n, int source) +{ + uint32_t cfg; + /* M value for MND divider. */ + uint32_t m_val = m; + /* NOT(N-M) value for MND divider. */ + uint32_t n_val = ~((n)-(m)) * !!(n); + /* NOT 2D value for MND divider. */ + uint32_t d_val = ~(n); + + /* Program MND values */ + writel(m_val, base + regs->M); + writel(n_val, base + regs->N); + writel(d_val, base + regs->D); + + /* setup src select and divider */ + cfg = readl(base + regs->cfg_rcgr); + cfg &= ~CFG_MASK; + cfg |= source & CFG_CLK_SRC_MASK; /* Select clock source */ + + /* Set the divider; HW permits fraction dividers (+0.5), but + for simplicity, we will support integers only */ + if (div) + cfg |= (2 * div - 1) & CFG_DIVIDER_MASK; + + if (n_val) + cfg |= CFG_MODE_DUAL_EDGE; + + writel(cfg, base + regs->cfg_rcgr); /* Write new clock configuration */ + + /* Inform h/w to start using the new config. */ + clk_bcr_update(base + regs->cmd_rcgr); +} + +static const struct bcr_regs sdc_regs[] = { + { + .cfg_rcgr = SDCC_CFG_RCGR(1), + .cmd_rcgr = SDCC_CMD_RCGR(1), + .M = SDCC_M(1), + .N = SDCC_N(1), + .D = SDCC_D(1), + }, + { + .cfg_rcgr = SDCC_CFG_RCGR(2), + .cmd_rcgr = SDCC_CMD_RCGR(2), + .M = SDCC_M(2), + .N = SDCC_N(2), + .D = SDCC_D(2), + } +}; + +/* Init clock for SDHCI controller */ +static int clk_init_sdc(struct msm_clk_priv *priv, int slot, uint rate) +{ + int div = 8; /* 100MHz default */ + + if (rate == 200000000) + div = 4; + + clk_enable_cbc(priv->base + SDCC_AHB_CBCR(slot)); + /* 800Mhz/div, gpll0 */ + clk_rcg_set_rate_mnd(priv->base, &sdc_regs[slot], div, 0, 0, + CFG_CLK_SRC_GPLL0); + clk_enable_gpll0(priv->base); + clk_enable_cbc(priv->base + SDCC_APPS_CBCR(slot)); + + return rate; +} + +static const struct bcr_regs uart2_regs = { + .cfg_rcgr = BLSP1_UART2_APPS_CFG_RCGR, + .cmd_rcgr = BLSP1_UART2_APPS_CMD_RCGR, + .M = BLSP1_UART2_APPS_M, + .N = BLSP1_UART2_APPS_N, + .D = BLSP1_UART2_APPS_D, +}; + +/* Init UART clock, 115200 */ +static int clk_init_uart(struct msm_clk_priv *priv) +{ + /* Enable iface clk */ + clk_enable_cbc(priv->base + BLSP1_AHB_CBCR); + /* 7372800 uart block clock @ GPLL0 */ + clk_rcg_set_rate_mnd(priv->base, &uart2_regs, 1, 144, 15625, + CFG_CLK_SRC_GPLL0); + clk_enable_gpll0(priv->base); + /* Enable core clk */ + clk_enable_cbc(priv->base + BLSP1_UART2_APPS_CBCR); + + return 0; +} + +ulong msm_set_periph_rate(struct udevice *dev, int periph, ulong rate) +{ + struct msm_clk_priv *priv = dev_get_priv(dev); + + switch (periph) { + case 0: /* SDC1 */ + return clk_init_sdc(priv, 0, rate); + break; + case 1: /* SDC2 */ + return clk_init_sdc(priv, 1, rate); + break; + case 4: /* UART2 */ + return clk_init_uart(priv); + break; + default: + return 0; + } +} + +static int msm_clk_probe(struct udevice *dev) +{ + struct msm_clk_priv *priv = dev_get_priv(dev); + + priv->base = dev_get_addr(dev); + if (priv->base == FDT_ADDR_T_NONE) + return -EINVAL; + + return 0; +} + +static struct clk_ops msm_clk_ops = { + .set_periph_rate = msm_set_periph_rate, +}; + +static const struct udevice_id msm_clk_ids[] = { + { .compatible = "qcom,gcc-msm8916" }, + { .compatible = "qcom,gcc-apq8016" }, + { } +}; + +U_BOOT_DRIVER(clk_msm) = { + .name = "clk_msm", + .id = UCLASS_CLK, + .of_match = msm_clk_ids, + .ops = &msm_clk_ops, + .priv_auto_alloc_size = sizeof(struct msm_clk_priv), + .probe = msm_clk_probe, +}; diff --git a/arch/arm/mach-snapdragon/include/mach/gpio.h b/arch/arm/mach-snapdragon/include/mach/gpio.h new file mode 100644 index 0000000..ff949b2 --- /dev/null +++ b/arch/arm/mach-snapdragon/include/mach/gpio.h @@ -0,0 +1,9 @@ +/* + * Empty gpio.h + * + * This file must stay as arch/arm/include/asm/gpio.h requires it. + * + * (C) Copyright 2015 Mateusz Kulikowski mateusz.kulikowski@gmail.com + * + * SPDX-License-Identifier: GPL-2.0+ + */ diff --git a/arch/arm/mach-snapdragon/include/mach/sysmap-apq8016.h b/arch/arm/mach-snapdragon/include/mach/sysmap-apq8016.h new file mode 100644 index 0000000..cdbfad0 --- /dev/null +++ b/arch/arm/mach-snapdragon/include/mach/sysmap-apq8016.h @@ -0,0 +1,14 @@ +/* + * Qualcomm APQ8916 sysmap + * + * (C) Copyright 2015 Mateusz Kulikowski mateusz.kulikowski@gmail.com + * + * SPDX-License-Identifier: GPL-2.0+ + */ +#ifndef _MACH_SYSMAP_APQ8016_H +#define _MACH_SYSMAP_APQ8016_H + +#define GICD_BASE 0x0b000000 +#define GICC_BASE 0x0a20c000 + +#endif diff --git a/arch/arm/mach-snapdragon/reset.c b/arch/arm/mach-snapdragon/reset.c new file mode 100644 index 0000000..2627eec --- /dev/null +++ b/arch/arm/mach-snapdragon/reset.c @@ -0,0 +1,40 @@ +/* + * Qualcomm APQ8016 reset controller driver + * + * (C) Copyright 2015 Mateusz Kulikowski mateusz.kulikowski@gmail.com + * + * SPDX-License-Identifier: GPL-2.0+ + */ + +#include <common.h> +#include <dm.h> +#include <errno.h> +#include <reset.h> +#include <asm/io.h> + +DECLARE_GLOBAL_DATA_PTR; + +static int msm_reset_request(struct udevice *dev, enum reset_t type) +{ + phys_addr_t addr = dev_get_addr(dev); + if (!addr) + return -EINVAL; + writel(0, addr); + return -EINPROGRESS; +} + +static struct reset_ops msm_reset_ops = { + .request = msm_reset_request, +}; + +static const struct udevice_id msm_reset_ids[] = { + { .compatible = "qcom,pshold" }, + { } +}; + +U_BOOT_DRIVER(msm_reset) = { + .name = "msm_reset", + .id = UCLASS_RESET, + .of_match = msm_reset_ids, + .ops = &msm_reset_ops, +};