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This patch adds GUTS driver to manage and access global utilities block. Signed-off-by: Yangbo Lu Acked-by: Scott Wood --- Changes for v4: - Added this patch Changes for v5: - Modified copyright info - Changed MODULE_LICENSE to GPL - Changed EXPORT_SYMBOL_GPL to EXPORT_SYMBOL - Made FSL_GUTS user-invisible - Added a complete compatible list for GUTS - Stored guts info in file-scope variable - Added mfspr() getting SVR - Redefined GUTS APIs - Called fsl_guts_init rather than using platform driver - Removed useless parentheses - Removed useless 'extern' key words Changes for v6: - Made guts thread safe in fsl_guts_init Changes for v7: - Removed 'ifdef' for function declaration in guts.h Changes for v8: - Fixes lines longer than 80 characters checkpatch issue - Added 'Acked-by: Scott Wood' --- drivers/soc/Kconfig | 2 +- drivers/soc/fsl/Kconfig | 8 +++ drivers/soc/fsl/Makefile | 1 + drivers/soc/fsl/guts.c | 119 ++++++++++++++++++++++++++++++++++++++++++++ include/linux/fsl/guts.h | 126 +++++++++++++++++++++++++++++------------------ 5 files changed, 207 insertions(+), 49 deletions(-) create mode 100644 drivers/soc/fsl/Kconfig create mode 100644 drivers/soc/fsl/guts.c diff --git a/drivers/soc/Kconfig b/drivers/soc/Kconfig index cb58ef0..7106463 100644 --- a/drivers/soc/Kconfig +++ b/drivers/soc/Kconfig @@ -2,7 +2,7 @@ menu "SOC (System On Chip) specific Drivers" source "drivers/soc/bcm/Kconfig" source "drivers/soc/brcmstb/Kconfig" -source "drivers/soc/fsl/qe/Kconfig" +source "drivers/soc/fsl/Kconfig" source "drivers/soc/mediatek/Kconfig" source "drivers/soc/qcom/Kconfig" source "drivers/soc/rockchip/Kconfig" diff --git a/drivers/soc/fsl/Kconfig b/drivers/soc/fsl/Kconfig new file mode 100644 index 0000000..b313759 --- /dev/null +++ b/drivers/soc/fsl/Kconfig @@ -0,0 +1,8 @@ +# +# Freescale SOC drivers +# + +source "drivers/soc/fsl/qe/Kconfig" + +config FSL_GUTS + bool diff --git a/drivers/soc/fsl/Makefile b/drivers/soc/fsl/Makefile index 203307f..02afb7f 100644 --- a/drivers/soc/fsl/Makefile +++ b/drivers/soc/fsl/Makefile @@ -4,3 +4,4 @@ obj-$(CONFIG_QUICC_ENGINE) += qe/ obj-$(CONFIG_CPM) += qe/ +obj-$(CONFIG_FSL_GUTS) += guts.o diff --git a/drivers/soc/fsl/guts.c b/drivers/soc/fsl/guts.c new file mode 100644 index 0000000..fa155e6 --- /dev/null +++ b/drivers/soc/fsl/guts.c @@ -0,0 +1,119 @@ +/* + * Freescale QorIQ Platforms GUTS Driver + * + * Copyright (C) 2016 Freescale Semiconductor, Inc. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + */ + +#include +#include +#include +#include +#include +#include +#include + +struct guts { + struct ccsr_guts __iomem *regs; + bool little_endian; +}; + +static struct guts *guts; +static DEFINE_MUTEX(guts_lock); + +u32 fsl_guts_get_svr(void) +{ + u32 svr = 0; + + if (!guts || !guts->regs) { +#ifdef CONFIG_PPC + svr = mfspr(SPRN_SVR); +#endif + return svr; + } + + if (guts->little_endian) + svr = ioread32(&guts->regs->svr); + else + svr = ioread32be(&guts->regs->svr); + + return svr; +} +EXPORT_SYMBOL(fsl_guts_get_svr); + +/* + * Table for matching compatible strings, for device tree + * guts node, for Freescale QorIQ SOCs. + */ +static const struct of_device_id guts_of_match[] = { + /* For T4 & B4 Series SOCs */ + { .compatible = "fsl,qoriq-device-config-1.0", }, + /* For P Series SOCs */ + { .compatible = "fsl,qoriq-device-config-2.0", }, + { .compatible = "fsl,p1010-guts", }, + { .compatible = "fsl,p1020-guts", }, + { .compatible = "fsl,p1021-guts", }, + { .compatible = "fsl,p1022-guts", }, + { .compatible = "fsl,p1023-guts", }, + { .compatible = "fsl,p2020-guts", }, + /* For BSC Series SOCs */ + { .compatible = "fsl,bsc9131-guts", }, + { .compatible = "fsl,bsc9132-guts", }, + /* For MPC85xx Series SOCs */ + { .compatible = "fsl,mpc8536-guts", }, + { .compatible = "fsl,mpc8544-guts", }, + { .compatible = "fsl,mpc8548-guts", }, + { .compatible = "fsl,mpc8568-guts", }, + { .compatible = "fsl,mpc8569-guts", }, + { .compatible = "fsl,mpc8572-guts", }, + /* For Layerscape Series SOCs */ + { .compatible = "fsl,ls1021a-dcfg", }, + { .compatible = "fsl,ls1043a-dcfg", }, + { .compatible = "fsl,ls2080a-dcfg", }, + {} +}; + +int fsl_guts_init(void) +{ + struct device_node *np; + int ret; + + mutex_lock(&guts_lock); + /* Initialize guts only once */ + if (guts) { + ret = guts->regs ? 0 : -ENOMEM; + goto out; + } + + np = of_find_matching_node(NULL, guts_of_match); + if (!np) { + ret = -ENODEV; + goto out; + } + + guts = kzalloc(sizeof(*guts), GFP_KERNEL); + if (!guts) { + ret = -ENOMEM; + goto out; + } + + guts->little_endian = of_property_read_bool(np, "little-endian"); + + guts->regs = of_iomap(np, 0); + if (!guts->regs) { + ret = -ENOMEM; + kfree(guts); + goto out; + } + + of_node_put(np); + ret = 0; +out: + mutex_unlock(&guts_lock); + return ret; +} +EXPORT_SYMBOL(fsl_guts_init); diff --git a/include/linux/fsl/guts.h b/include/linux/fsl/guts.h index 649e917..7e1e22b 100644 --- a/include/linux/fsl/guts.h +++ b/include/linux/fsl/guts.h @@ -29,83 +29,113 @@ * #ifdefs. */ struct ccsr_guts { - __be32 porpllsr; /* 0x.0000 - POR PLL Ratio Status Register */ - __be32 porbmsr; /* 0x.0004 - POR Boot Mode Status Register */ - __be32 porimpscr; /* 0x.0008 - POR I/O Impedance Status and Control Register */ - __be32 pordevsr; /* 0x.000c - POR I/O Device Status Register */ - __be32 pordbgmsr; /* 0x.0010 - POR Debug Mode Status Register */ - __be32 pordevsr2; /* 0x.0014 - POR device status register 2 */ + u32 porpllsr; /* 0x.0000 - POR PLL Ratio Status Register */ + u32 porbmsr; /* 0x.0004 - POR Boot Mode Status Register */ + u32 porimpscr; /* 0x.0008 - POR I/O Impedance Status and + * Control Register + */ + u32 pordevsr; /* 0x.000c - POR I/O Device Status Register */ + u32 pordbgmsr; /* 0x.0010 - POR Debug Mode Status Register */ + u32 pordevsr2; /* 0x.0014 - POR device status register 2 */ u8 res018[0x20 - 0x18]; - __be32 porcir; /* 0x.0020 - POR Configuration Information Register */ + u32 porcir; /* 0x.0020 - POR Configuration Information + * Register + */ u8 res024[0x30 - 0x24]; - __be32 gpiocr; /* 0x.0030 - GPIO Control Register */ + u32 gpiocr; /* 0x.0030 - GPIO Control Register */ u8 res034[0x40 - 0x34]; - __be32 gpoutdr; /* 0x.0040 - General-Purpose Output Data Register */ + u32 gpoutdr; /* 0x.0040 - General-Purpose Output Data + * Register + */ u8 res044[0x50 - 0x44]; - __be32 gpindr; /* 0x.0050 - General-Purpose Input Data Register */ + u32 gpindr; /* 0x.0050 - General-Purpose Input Data + * Register + */ u8 res054[0x60 - 0x54]; - __be32 pmuxcr; /* 0x.0060 - Alternate Function Signal Multiplex Control */ - __be32 pmuxcr2; /* 0x.0064 - Alternate function signal multiplex control 2 */ - __be32 dmuxcr; /* 0x.0068 - DMA Mux Control Register */ + u32 pmuxcr; /* 0x.0060 - Alternate Function Signal + * Multiplex Control + */ + u32 pmuxcr2; /* 0x.0064 - Alternate function signal + * multiplex control 2 + */ + u32 dmuxcr; /* 0x.0068 - DMA Mux Control Register */ u8 res06c[0x70 - 0x6c]; - __be32 devdisr; /* 0x.0070 - Device Disable Control */ + u32 devdisr; /* 0x.0070 - Device Disable Control */ #define CCSR_GUTS_DEVDISR_TB1 0x00001000 #define CCSR_GUTS_DEVDISR_TB0 0x00004000 - __be32 devdisr2; /* 0x.0074 - Device Disable Control 2 */ + u32 devdisr2; /* 0x.0074 - Device Disable Control 2 */ u8 res078[0x7c - 0x78]; - __be32 pmjcr; /* 0x.007c - 4 Power Management Jog Control Register */ - __be32 powmgtcsr; /* 0x.0080 - Power Management Status and Control Register */ - __be32 pmrccr; /* 0x.0084 - Power Management Reset Counter Configuration Register */ - __be32 pmpdccr; /* 0x.0088 - Power Management Power Down Counter Configuration Register */ - __be32 pmcdr; /* 0x.008c - 4Power management clock disable register */ - __be32 mcpsumr; /* 0x.0090 - Machine Check Summary Register */ - __be32 rstrscr; /* 0x.0094 - Reset Request Status and Control Register */ - __be32 ectrstcr; /* 0x.0098 - Exception reset control register */ - __be32 autorstsr; /* 0x.009c - Automatic reset status register */ - __be32 pvr; /* 0x.00a0 - Processor Version Register */ - __be32 svr; /* 0x.00a4 - System Version Register */ + u32 pmjcr; /* 0x.007c - 4 Power Management Jog Control + * Register + */ + u32 powmgtcsr; /* 0x.0080 - Power Management Status and + * Control Register + */ + u32 pmrccr; /* 0x.0084 - Power Management Reset Counter + * Configuration Register + */ + u32 pmpdccr; /* 0x.0088 - Power Management Power Down Counter + * Configuration Register + */ + u32 pmcdr; /* 0x.008c - 4Power management clock disable + * register + */ + u32 mcpsumr; /* 0x.0090 - Machine Check Summary Register */ + u32 rstrscr; /* 0x.0094 - Reset Request Status and + * Control Register + */ + u32 ectrstcr; /* 0x.0098 - Exception reset control register */ + u32 autorstsr; /* 0x.009c - Automatic reset status register */ + u32 pvr; /* 0x.00a0 - Processor Version Register */ + u32 svr; /* 0x.00a4 - System Version Register */ u8 res0a8[0xb0 - 0xa8]; - __be32 rstcr; /* 0x.00b0 - Reset Control Register */ + u32 rstcr; /* 0x.00b0 - Reset Control Register */ u8 res0b4[0xc0 - 0xb4]; - __be32 iovselsr; /* 0x.00c0 - I/O voltage select status register + u32 iovselsr; /* 0x.00c0 - I/O voltage select status register Called 'elbcvselcr' on 86xx SOCs */ u8 res0c4[0x100 - 0xc4]; - __be32 rcwsr[16]; /* 0x.0100 - Reset Control Word Status registers + u32 rcwsr[16]; /* 0x.0100 - Reset Control Word Status registers There are 16 registers */ u8 res140[0x224 - 0x140]; - __be32 iodelay1; /* 0x.0224 - IO delay control register 1 */ - __be32 iodelay2; /* 0x.0228 - IO delay control register 2 */ + u32 iodelay1; /* 0x.0224 - IO delay control register 1 */ + u32 iodelay2; /* 0x.0228 - IO delay control register 2 */ u8 res22c[0x604 - 0x22c]; - __be32 pamubypenr; /* 0x.604 - PAMU bypass enable register */ + u32 pamubypenr; /* 0x.604 - PAMU bypass enable register */ u8 res608[0x800 - 0x608]; - __be32 clkdvdr; /* 0x.0800 - Clock Divide Register */ + u32 clkdvdr; /* 0x.0800 - Clock Divide Register */ u8 res804[0x900 - 0x804]; - __be32 ircr; /* 0x.0900 - Infrared Control Register */ + u32 ircr; /* 0x.0900 - Infrared Control Register */ u8 res904[0x908 - 0x904]; - __be32 dmacr; /* 0x.0908 - DMA Control Register */ + u32 dmacr; /* 0x.0908 - DMA Control Register */ u8 res90c[0x914 - 0x90c]; - __be32 elbccr; /* 0x.0914 - eLBC Control Register */ + u32 elbccr; /* 0x.0914 - eLBC Control Register */ u8 res918[0xb20 - 0x918]; - __be32 ddr1clkdr; /* 0x.0b20 - DDR1 Clock Disable Register */ - __be32 ddr2clkdr; /* 0x.0b24 - DDR2 Clock Disable Register */ - __be32 ddrclkdr; /* 0x.0b28 - DDR Clock Disable Register */ + u32 ddr1clkdr; /* 0x.0b20 - DDR1 Clock Disable Register */ + u32 ddr2clkdr; /* 0x.0b24 - DDR2 Clock Disable Register */ + u32 ddrclkdr; /* 0x.0b28 - DDR Clock Disable Register */ u8 resb2c[0xe00 - 0xb2c]; - __be32 clkocr; /* 0x.0e00 - Clock Out Select Register */ + u32 clkocr; /* 0x.0e00 - Clock Out Select Register */ u8 rese04[0xe10 - 0xe04]; - __be32 ddrdllcr; /* 0x.0e10 - DDR DLL Control Register */ + u32 ddrdllcr; /* 0x.0e10 - DDR DLL Control Register */ u8 rese14[0xe20 - 0xe14]; - __be32 lbcdllcr; /* 0x.0e20 - LBC DLL Control Register */ - __be32 cpfor; /* 0x.0e24 - L2 charge pump fuse override register */ + u32 lbcdllcr; /* 0x.0e20 - LBC DLL Control Register */ + u32 cpfor; /* 0x.0e24 - L2 charge pump fuse override + * register + */ u8 rese28[0xf04 - 0xe28]; - __be32 srds1cr0; /* 0x.0f04 - SerDes1 Control Register 0 */ - __be32 srds1cr1; /* 0x.0f08 - SerDes1 Control Register 0 */ + u32 srds1cr0; /* 0x.0f04 - SerDes1 Control Register 0 */ + u32 srds1cr1; /* 0x.0f08 - SerDes1 Control Register 0 */ u8 resf0c[0xf2c - 0xf0c]; - __be32 itcr; /* 0x.0f2c - Internal transaction control register */ + u32 itcr; /* 0x.0f2c - Internal transaction control + * register + */ u8 resf30[0xf40 - 0xf30]; - __be32 srds2cr0; /* 0x.0f40 - SerDes2 Control Register 0 */ - __be32 srds2cr1; /* 0x.0f44 - SerDes2 Control Register 0 */ + u32 srds2cr0; /* 0x.0f40 - SerDes2 Control Register 0 */ + u32 srds2cr1; /* 0x.0f44 - SerDes2 Control Register 0 */ } __attribute__ ((packed)); +u32 fsl_guts_get_svr(void); +int fsl_guts_init(void); /* Alternate function signal multiplex control */ #define MPC85xx_PMUXCR_QE(x) (0x8000 >> (x))