diff --git a/Documentation/devicetree/bindings/bus/ti-sysc.txt b/Documentation/devicetree/bindings/bus/ti-sysc.txt index fb1790e39398..2957a9ae291f 100644 --- a/Documentation/devicetree/bindings/bus/ti-sysc.txt +++ b/Documentation/devicetree/bindings/bus/ti-sysc.txt @@ -19,6 +19,7 @@ Required standard properties: - compatible shall be one of the following generic types: + "ti,sysc" "ti,sysc-omap2" "ti,sysc-omap4" "ti,sysc-omap4-simple" @@ -26,6 +27,8 @@ Required standard properties: or one of the following derivative types for hardware needing special workarounds: + "ti,sysc-omap2-timer" + "ti,sysc-omap4-timer" "ti,sysc-omap3430-sr" "ti,sysc-omap3630-sr" "ti,sysc-omap4-sr" @@ -49,6 +52,26 @@ Required standard properties: Optional properties: +- ti,sysc-mask shall contain mask of supported register bits for the + SYSCONFIG register as documented in the Technical Reference + Manual (TRM) for the interconnect target module + +- ti,sysc-midle list of master idle modes supported by the interconnect + target module as documented in the TRM for SYSCONFIG + register MIDLEMODE bits + +- ti,sysc-sidle list of slave idle modes supported by the interconnect + target module as documented in the TRM for SYSCONFIG + register SIDLEMODE bits + +- ti,sysc-delay-us delay needed after OCP softreset before accssing + SYSCONFIG register again + +- ti,syss-mask optional mask of reset done status bits as described in the + TRM for SYSSTATUS registers, typically 1 with some devices + having separate reset done bits for children like OHCI and + EHCI + - clocks clock specifier for each name in the clock-names as specified in the binding documentation for ti-clkctrl, typically available for all interconnect targets on TI SoCs @@ -61,6 +84,9 @@ Optional properties: - ti,hwmods optional TI interconnect module name to use legacy hwmod platform data +- ti,no-reset-on-init interconnect target module should not be reset at init + +- ti,no-idle-on-init interconnect target module should not be idled at init Example: Single instance of MUSB controller on omap4 using interconnect ranges using offsets from l4_cfg second segment (0x4a000000 + 0x80000 = 0x4a0ab000): @@ -74,6 +100,17 @@ using offsets from l4_cfg second segment (0x4a000000 + 0x80000 = 0x4a0ab000): reg-names = "rev", "sysc", "syss"; clocks = <&l3_init_clkctrl OMAP4_USB_OTG_HS_CLKCTRL 0>; clock-names = "fck"; + ti,sysc-mask = <(SYSC_OMAP2_ENAWAKEUP | + SYSC_OMAP2_SOFTRESET | + SYSC_OMAP2_AUTOIDLE)>; + ti,sysc-midle = , + , + ; + ti,sysc-sidle = , + , + , + ; + ti,syss-mask = <1>; #address-cells = <1>; #size-cells = <1>; ranges = <0 0x2b000 0x1000>; diff --git a/arch/arm/boot/dts/dra7.dtsi b/arch/arm/boot/dts/dra7.dtsi index ac9216293b7c..5d3c9374795a 100644 --- a/arch/arm/boot/dts/dra7.dtsi +++ b/arch/arm/boot/dts/dra7.dtsi @@ -1498,7 +1498,7 @@ }; target-module@4a0dd000 { - compatible = "ti,sysc-omap4-sr"; + compatible = "ti,sysc-omap4-sr", "ti,sysc"; ti,hwmods = "smartreflex_core"; reg = <0x4a0dd000 0x4>, <0x4a0dd008 0x4>; @@ -1511,7 +1511,7 @@ }; target-module@4a0d9000 { - compatible = "ti,sysc-omap4-sr"; + compatible = "ti,sysc-omap4-sr", "ti,sysc"; ti,hwmods = "smartreflex_mpu"; reg = <0x4a0d9000 0x4>, <0x4a0d9008 0x4>; diff --git a/arch/arm/boot/dts/omap4.dtsi b/arch/arm/boot/dts/omap4.dtsi index cc1a07a3620f..60244b7a993e 100644 --- a/arch/arm/boot/dts/omap4.dtsi +++ b/arch/arm/boot/dts/omap4.dtsi @@ -383,7 +383,7 @@ }; target-module@48076000 { - compatible = "ti,sysc-omap4"; + compatible = "ti,sysc-omap4", "ti,sysc"; ti,hwmods = "slimbus2"; reg = <0x48076000 0x4>, <0x48076010 0x4>; @@ -456,7 +456,7 @@ }; target-module@4a0db000 { - compatible = "ti,sysc-sr"; + compatible = "ti,sysc-omap4-sr", "ti,sysc"; ti,hwmods = "smartreflex_iva"; reg = <0x4a0db000 0x4>, <0x4a0db008 0x4>; @@ -473,7 +473,7 @@ }; target-module@4a0dd000 { - compatible = "ti,sysc-sr"; + compatible = "ti,sysc-omap4-sr", "ti,sysc"; ti,hwmods = "smartreflex_core"; reg = <0x4a0dd000 0x4>, <0x4a0dd008 0x4>; @@ -490,7 +490,7 @@ }; target-module@4a0d9000 { - compatible = "ti,sysc-sr"; + compatible = "ti,sysc-omap4-sr", "ti,sysc"; ti,hwmods = "smartreflex_mpu"; reg = <0x4a0d9000 0x4>, <0x4a0d9008 0x4>; @@ -710,7 +710,7 @@ }; target-module@52000000 { - compatible = "ti,sysc-omap4"; + compatible = "ti,sysc-omap4", "ti,sysc"; ti,hwmods = "iss"; reg = <0x52000000 0x4>, <0x52000010 0x4>; @@ -817,7 +817,7 @@ }; target-module@40128000 { - compatible = "ti,sysc-mcasp"; + compatible = "ti,sysc-mcasp", "ti,sysc"; ti,hwmods = "mcasp"; reg = <0x40128004 0x4>; reg-names = "sysc"; @@ -835,7 +835,7 @@ }; target-module@4012c000 { - compatible = "ti,sysc-omap4"; + compatible = "ti,sysc-omap4", "ti,sysc"; ti,hwmods = "slimbus1"; reg = <0x4012c000 0x4>, <0x4012c010 0x4>; @@ -849,7 +849,7 @@ }; target-module@401f1000 { - compatible = "ti,sysc-omap4"; + compatible = "ti,sysc-omap4", "ti,sysc"; ti,hwmods = "aess"; reg = <0x401f1000 0x4>, <0x401f1010 0x4>; @@ -955,7 +955,7 @@ }; target-module@4a10a000 { - compatible = "ti,sysc-omap4"; + compatible = "ti,sysc-omap4", "ti,sysc"; ti,hwmods = "fdif"; reg = <0x4a10a000 0x4>, <0x4a10a010 0x4>; @@ -1182,7 +1182,7 @@ }; target-module@56000000 { - compatible = "ti,sysc-omap4"; + compatible = "ti,sysc-omap4", "ti,sysc"; ti,hwmods = "gpu"; reg = <0x5601fc00 0x4>, <0x5601fc10 0x4>; diff --git a/arch/arm/mach-omap2/omap_hwmod.c b/arch/arm/mach-omap2/omap_hwmod.c index 104256a5f0f7..fbc738c844b3 100644 --- a/arch/arm/mach-omap2/omap_hwmod.c +++ b/arch/arm/mach-omap2/omap_hwmod.c @@ -143,6 +143,8 @@ #include #include +#include + #include #include "clock.h" diff --git a/arch/arm/mach-omap2/omap_hwmod.h b/arch/arm/mach-omap2/omap_hwmod.h index df2239a58555..b7eeb6193504 100644 --- a/arch/arm/mach-omap2/omap_hwmod.h +++ b/arch/arm/mach-omap2/omap_hwmod.h @@ -37,9 +37,15 @@ struct omap_device; -extern struct omap_hwmod_sysc_fields omap_hwmod_sysc_type1; -extern struct omap_hwmod_sysc_fields omap_hwmod_sysc_type2; -extern struct omap_hwmod_sysc_fields omap_hwmod_sysc_type3; +extern struct sysc_regbits omap_hwmod_sysc_type1; +extern struct sysc_regbits omap_hwmod_sysc_type2; +extern struct sysc_regbits omap_hwmod_sysc_type3; +extern struct sysc_regbits omap34xx_sr_sysc_fields; +extern struct sysc_regbits omap36xx_sr_sysc_fields; +extern struct sysc_regbits omap3_sham_sysc_fields; +extern struct sysc_regbits omap3xxx_aes_sysc_fields; +extern struct sysc_regbits omap_hwmod_sysc_type_mcasp; +extern struct sysc_regbits omap_hwmod_sysc_type_usb_host_fs; /* * OCP SYSCONFIG bit shifts/masks TYPE1. These are for IPs compliant @@ -284,26 +290,6 @@ struct omap_hwmod_ocp_if { #define CLOCKACT_TEST_ICLK 0x2 #define CLOCKACT_TEST_NONE 0x3 -/** - * struct omap_hwmod_sysc_fields - hwmod OCP_SYSCONFIG register field offsets. - * @midle_shift: Offset of the midle bit - * @clkact_shift: Offset of the clockactivity bit - * @sidle_shift: Offset of the sidle bit - * @enwkup_shift: Offset of the enawakeup bit - * @srst_shift: Offset of the softreset bit - * @autoidle_shift: Offset of the autoidle bit - * @dmadisable_shift: Offset of the dmadisable bit - */ -struct omap_hwmod_sysc_fields { - u8 midle_shift; - u8 clkact_shift; - u8 sidle_shift; - u8 enwkup_shift; - u8 srst_shift; - u8 autoidle_shift; - u8 dmadisable_shift; -}; - /** * struct omap_hwmod_class_sysconfig - hwmod class OCP_SYS* data * @rev_offs: IP block revision register offset (from module base addr) @@ -335,7 +321,7 @@ struct omap_hwmod_class_sysconfig { u32 sysc_offs; u32 syss_offs; u16 sysc_flags; - struct omap_hwmod_sysc_fields *sysc_fields; + struct sysc_regbits *sysc_fields; u8 srst_udelay; u8 idlemodes; }; diff --git a/arch/arm/mach-omap2/omap_hwmod_3xxx_data.c b/arch/arm/mach-omap2/omap_hwmod_3xxx_data.c index 52c9d585b44d..bac3508e33ce 100644 --- a/arch/arm/mach-omap2/omap_hwmod_3xxx_data.c +++ b/arch/arm/mach-omap2/omap_hwmod_3xxx_data.c @@ -1190,10 +1190,6 @@ static struct omap_hwmod omap3xxx_mcbsp3_sidetone_hwmod = { }; /* SR common */ -static struct omap_hwmod_sysc_fields omap34xx_sr_sysc_fields = { - .clkact_shift = 20, -}; - static struct omap_hwmod_class_sysconfig omap34xx_sr_sysc = { .sysc_offs = 0x24, .sysc_flags = (SYSC_HAS_CLOCKACTIVITY | SYSC_NO_CACHE), @@ -1206,11 +1202,6 @@ static struct omap_hwmod_class omap34xx_smartreflex_hwmod_class = { .rev = 1, }; -static struct omap_hwmod_sysc_fields omap36xx_sr_sysc_fields = { - .sidle_shift = 24, - .enwkup_shift = 26, -}; - static struct omap_hwmod_class_sysconfig omap36xx_sr_sysc = { .sysc_offs = 0x38, .idlemodes = (SIDLE_FORCE | SIDLE_NO | SIDLE_SMART), @@ -2732,12 +2723,6 @@ static struct omap_hwmod_ocp_if omap3xxx_l3_main__gpmc = { }; /* l4_core -> SHAM2 (SHA1/MD5) (similar to omap24xx) */ -static struct omap_hwmod_sysc_fields omap3_sham_sysc_fields = { - .sidle_shift = 4, - .srst_shift = 1, - .autoidle_shift = 0, -}; - static struct omap_hwmod_class_sysconfig omap3_sham_sysc = { .rev_offs = 0x5c, .sysc_offs = 0x60, @@ -2778,12 +2763,6 @@ static struct omap_hwmod_ocp_if omap3xxx_l4_core__sham = { }; /* l4_core -> AES */ -static struct omap_hwmod_sysc_fields omap3xxx_aes_sysc_fields = { - .sidle_shift = 6, - .srst_shift = 1, - .autoidle_shift = 0, -}; - static struct omap_hwmod_class_sysconfig omap3_aes_sysc = { .rev_offs = 0x44, .sysc_offs = 0x48, diff --git a/arch/arm/mach-omap2/omap_hwmod_44xx_data.c b/arch/arm/mach-omap2/omap_hwmod_44xx_data.c index c47709659a54..a1901c22a0f0 100644 --- a/arch/arm/mach-omap2/omap_hwmod_44xx_data.c +++ b/arch/arm/mach-omap2/omap_hwmod_44xx_data.c @@ -1658,10 +1658,6 @@ static struct omap_hwmod omap44xx_mailbox_hwmod = { */ /* The IP is not compliant to type1 / type2 scheme */ -static struct omap_hwmod_sysc_fields omap_hwmod_sysc_type_mcasp = { - .sidle_shift = 0, -}; - static struct omap_hwmod_class_sysconfig omap44xx_mcasp_sysc = { .sysc_offs = 0x0004, .sysc_flags = SYSC_HAS_SIDLEMODE, @@ -2403,17 +2399,12 @@ static struct omap_hwmod omap44xx_slimbus2_hwmod = { */ /* The IP is not compliant to type1 / type2 scheme */ -static struct omap_hwmod_sysc_fields omap_hwmod_sysc_type_smartreflex = { - .sidle_shift = 24, - .enwkup_shift = 26, -}; - static struct omap_hwmod_class_sysconfig omap44xx_smartreflex_sysc = { .sysc_offs = 0x0038, .sysc_flags = (SYSC_HAS_ENAWAKEUP | SYSC_HAS_SIDLEMODE), .idlemodes = (SIDLE_FORCE | SIDLE_NO | SIDLE_SMART | SIDLE_SMART_WKUP), - .sysc_fields = &omap_hwmod_sysc_type_smartreflex, + .sysc_fields = &omap36xx_sr_sysc_fields, }; static struct omap_hwmod_class omap44xx_smartreflex_hwmod_class = { @@ -2844,12 +2835,6 @@ static struct omap_hwmod omap44xx_uart4_hwmod = { */ /* The IP is not compliant to type1 / type2 scheme */ -static struct omap_hwmod_sysc_fields omap_hwmod_sysc_type_usb_host_fs = { - .midle_shift = 4, - .sidle_shift = 2, - .srst_shift = 1, -}; - static struct omap_hwmod_class_sysconfig omap44xx_usb_host_fs_sysc = { .rev_offs = 0x0000, .sysc_offs = 0x0210, diff --git a/arch/arm/mach-omap2/omap_hwmod_7xx_data.c b/arch/arm/mach-omap2/omap_hwmod_7xx_data.c index d05e553d6346..f4698d662eb1 100644 --- a/arch/arm/mach-omap2/omap_hwmod_7xx_data.c +++ b/arch/arm/mach-omap2/omap_hwmod_7xx_data.c @@ -2055,17 +2055,12 @@ static struct omap_hwmod dra7xx_sata_hwmod = { */ /* The IP is not compliant to type1 / type2 scheme */ -static struct omap_hwmod_sysc_fields omap_hwmod_sysc_type_smartreflex = { - .sidle_shift = 24, - .enwkup_shift = 26, -}; - static struct omap_hwmod_class_sysconfig dra7xx_smartreflex_sysc = { .sysc_offs = 0x0038, .sysc_flags = (SYSC_HAS_ENAWAKEUP | SYSC_HAS_SIDLEMODE), .idlemodes = (SIDLE_FORCE | SIDLE_NO | SIDLE_SMART | SIDLE_SMART_WKUP), - .sysc_fields = &omap_hwmod_sysc_type_smartreflex, + .sysc_fields = &omap36xx_sr_sysc_fields, }; static struct omap_hwmod_class dra7xx_smartreflex_hwmod_class = { diff --git a/arch/arm/mach-omap2/omap_hwmod_common_data.c b/arch/arm/mach-omap2/omap_hwmod_common_data.c index 79d623b83e49..77c0b7618ea2 100644 --- a/arch/arm/mach-omap2/omap_hwmod_common_data.c +++ b/arch/arm/mach-omap2/omap_hwmod_common_data.c @@ -16,6 +16,9 @@ * data and their integration with other OMAP modules and Linux. */ +#include +#include + #include "omap_hwmod.h" #include "omap_hwmod_common_data.h" @@ -27,7 +30,7 @@ * if the device ip is compliant with the original PRCM protocol * defined for OMAP2420. */ -struct omap_hwmod_sysc_fields omap_hwmod_sysc_type1 = { +struct sysc_regbits omap_hwmod_sysc_type1 = { .midle_shift = SYSC_TYPE1_MIDLEMODE_SHIFT, .clkact_shift = SYSC_TYPE1_CLOCKACTIVITY_SHIFT, .sidle_shift = SYSC_TYPE1_SIDLEMODE_SHIFT, @@ -43,7 +46,7 @@ struct omap_hwmod_sysc_fields omap_hwmod_sysc_type1 = { * device ip is compliant with the new PRCM protocol defined for new * OMAP4 IPs. */ -struct omap_hwmod_sysc_fields omap_hwmod_sysc_type2 = { +struct sysc_regbits omap_hwmod_sysc_type2 = { .midle_shift = SYSC_TYPE2_MIDLEMODE_SHIFT, .sidle_shift = SYSC_TYPE2_SIDLEMODE_SHIFT, .srst_shift = SYSC_TYPE2_SOFTRESET_SHIFT, @@ -54,7 +57,7 @@ struct omap_hwmod_sysc_fields omap_hwmod_sysc_type2 = { * struct omap_hwmod_sysc_type3 - TYPE3 sysconfig scheme. * Used by some IPs on AM33xx */ -struct omap_hwmod_sysc_fields omap_hwmod_sysc_type3 = { +struct sysc_regbits omap_hwmod_sysc_type3 = { .midle_shift = SYSC_TYPE3_MIDLEMODE_SHIFT, .sidle_shift = SYSC_TYPE3_SIDLEMODE_SHIFT, }; @@ -63,3 +66,34 @@ struct omap_dss_dispc_dev_attr omap2_3_dss_dispc_dev_attr = { .manager_count = 2, .has_framedonetv_irq = 0 }; + +struct sysc_regbits omap34xx_sr_sysc_fields = { + .clkact_shift = 20, +}; + +struct sysc_regbits omap36xx_sr_sysc_fields = { + .sidle_shift = 24, + .enwkup_shift = 26, +}; + +struct sysc_regbits omap3_sham_sysc_fields = { + .sidle_shift = 4, + .srst_shift = 1, + .autoidle_shift = 0, +}; + +struct sysc_regbits omap3xxx_aes_sysc_fields = { + .sidle_shift = 6, + .srst_shift = 1, + .autoidle_shift = 0, +}; + +struct sysc_regbits omap_hwmod_sysc_type_mcasp = { + .sidle_shift = 0, +}; + +struct sysc_regbits omap_hwmod_sysc_type_usb_host_fs = { + .midle_shift = 4, + .sidle_shift = 2, + .srst_shift = 1, +}; diff --git a/drivers/bus/ti-sysc.c b/drivers/bus/ti-sysc.c index c3c76a1ea8a8..2c62985a345f 100644 --- a/drivers/bus/ti-sysc.c +++ b/drivers/bus/ti-sysc.c @@ -18,6 +18,9 @@ #include #include #include +#include + +#include enum sysc_registers { SYSC_REVISION, @@ -36,6 +39,9 @@ enum sysc_clocks { static const char * const clock_names[] = { "fck", "ick", }; +#define SYSC_IDLEMODE_MASK 3 +#define SYSC_CLOCKACTIVITY_MASK 3 + /** * struct sysc - TI sysc interconnect target module registers and capabilities * @dev: struct device pointer @@ -45,6 +51,10 @@ static const char * const clock_names[] = { "fck", "ick", }; * @offsets: register offsets from module base * @clocks: clocks used by the interconnect target module * @legacy_mode: configured for legacy mode if set + * @cap: interconnect target module capabilities + * @cfg: interconnect target module configuration + * @name: name if available + * @revision: interconnect target module revision */ struct sysc { struct device *dev; @@ -54,12 +64,34 @@ struct sysc { int offsets[SYSC_MAX_REGS]; struct clk *clocks[SYSC_MAX_CLOCKS]; const char *legacy_mode; + const struct sysc_capabilities *cap; + struct sysc_config cfg; + const char *name; + u32 revision; }; +static u32 sysc_read(struct sysc *ddata, int offset) +{ + if (ddata->cfg.quirks & SYSC_QUIRK_16BIT) { + u32 val; + + val = readw_relaxed(ddata->module_va + offset); + val |= (readw_relaxed(ddata->module_va + offset + 4) << 16); + + return val; + } + + return readl_relaxed(ddata->module_va + offset); +} + static u32 sysc_read_revision(struct sysc *ddata) { - return readl_relaxed(ddata->module_va + - ddata->offsets[SYSC_REVISION]); + int offset = ddata->offsets[SYSC_REVISION]; + + if (offset < 0) + return 0; + + return sysc_read(ddata, offset); } static int sysc_get_one_clock(struct sysc *ddata, @@ -206,6 +238,21 @@ static int sysc_check_children(struct sysc *ddata) return 0; } +/* + * So far only I2C uses 16-bit read access with clockactivity with revision + * in two registers with stride of 4. We can detect this based on the rev + * register size to configure things far enough to be able to properly read + * the revision register. + */ +static void sysc_check_quirk_16bit(struct sysc *ddata, struct resource *res) +{ + if (resource_size(res) == 8) { + dev_dbg(ddata->dev, + "enabling 16-bit and clockactivity quirks\n"); + ddata->cfg.quirks |= SYSC_QUIRK_16BIT | SYSC_QUIRK_USE_CLOCKACT; + } +} + /** * sysc_parse_one - parses the interconnect target module registers * @ddata: device driver data @@ -236,6 +283,8 @@ static int sysc_parse_one(struct sysc *ddata, enum sysc_registers reg) } ddata->offsets[reg] = res->start - ddata->module_pa; + if (reg == SYSC_REVISION) + sysc_check_quirk_16bit(ddata, res); return 0; } @@ -369,22 +418,12 @@ static int sysc_map_and_check_registers(struct sysc *ddata) */ static int sysc_show_rev(char *bufp, struct sysc *ddata) { - int error, len; + int len; if (ddata->offsets[SYSC_REVISION] < 0) return sprintf(bufp, ":NA"); - error = pm_runtime_get_sync(ddata->dev); - if (error < 0) { - pm_runtime_put_noidle(ddata->dev); - - return 0; - } - - len = sprintf(bufp, ":%08x", sysc_read_revision(ddata)); - - pm_runtime_mark_last_busy(ddata->dev); - pm_runtime_put_autosuspend(ddata->dev); + len = sprintf(bufp, ":%08x", ddata->revision); return len; } @@ -464,6 +503,151 @@ static const struct dev_pm_ops sysc_pm_ops = { NULL) }; +/* At this point the module is configured enough to read the revision */ +static int sysc_init_module(struct sysc *ddata) +{ + int error; + + error = pm_runtime_get_sync(ddata->dev); + if (error < 0) { + pm_runtime_put_noidle(ddata->dev); + + return 0; + } + ddata->revision = sysc_read_revision(ddata); + pm_runtime_put_sync(ddata->dev); + + return 0; +} + +static int sysc_init_sysc_mask(struct sysc *ddata) +{ + struct device_node *np = ddata->dev->of_node; + int error; + u32 val; + + error = of_property_read_u32(np, "ti,sysc-mask", &val); + if (error) + return 0; + + if (val) + ddata->cfg.sysc_val = val & ddata->cap->sysc_mask; + else + ddata->cfg.sysc_val = ddata->cap->sysc_mask; + + return 0; +} + +static int sysc_init_idlemode(struct sysc *ddata, u8 *idlemodes, + const char *name) +{ + struct device_node *np = ddata->dev->of_node; + struct property *prop; + const __be32 *p; + u32 val; + + of_property_for_each_u32(np, name, prop, p, val) { + if (val >= SYSC_NR_IDLEMODES) { + dev_err(ddata->dev, "invalid idlemode: %i\n", val); + return -EINVAL; + } + *idlemodes |= (1 << val); + } + + return 0; +} + +static int sysc_init_idlemodes(struct sysc *ddata) +{ + int error; + + error = sysc_init_idlemode(ddata, &ddata->cfg.midlemodes, + "ti,sysc-midle"); + if (error) + return error; + + error = sysc_init_idlemode(ddata, &ddata->cfg.sidlemodes, + "ti,sysc-sidle"); + if (error) + return error; + + return 0; +} + +/* + * Only some devices on omap4 and later have SYSCONFIG reset done + * bit. We can detect this if there is no SYSSTATUS at all, or the + * SYSTATUS bit 0 is not used. Note that some SYSSTATUS registers + * have multiple bits for the child devices like OHCI and EHCI. + * Depends on SYSC being parsed first. + */ +static int sysc_init_syss_mask(struct sysc *ddata) +{ + struct device_node *np = ddata->dev->of_node; + int error; + u32 val; + + error = of_property_read_u32(np, "ti,syss-mask", &val); + if (error) { + if ((ddata->cap->type == TI_SYSC_OMAP4 || + ddata->cap->type == TI_SYSC_OMAP4_TIMER) && + (ddata->cfg.sysc_val & SYSC_OMAP4_SOFTRESET)) + ddata->cfg.quirks |= SYSC_QUIRK_RESET_STATUS; + + return 0; + } + + if (!(val & 1) && (ddata->cfg.sysc_val & SYSC_OMAP4_SOFTRESET)) + ddata->cfg.quirks |= SYSC_QUIRK_RESET_STATUS; + + ddata->cfg.syss_mask = val; + + return 0; +} + +/* Device tree configured quirks */ +struct sysc_dts_quirk { + const char *name; + u32 mask; +}; + +static const struct sysc_dts_quirk sysc_dts_quirks[] = { + { .name = "ti,no-idle-on-init", + .mask = SYSC_QUIRK_NO_IDLE_ON_INIT, }, + { .name = "ti,no-reset-on-init", + .mask = SYSC_QUIRK_NO_RESET_ON_INIT, }, +}; + +static int sysc_init_dts_quirks(struct sysc *ddata) +{ + struct device_node *np = ddata->dev->of_node; + const struct property *prop; + int i, len, error; + u32 val; + + ddata->legacy_mode = of_get_property(np, "ti,hwmods", NULL); + + for (i = 0; i < ARRAY_SIZE(sysc_dts_quirks); i++) { + prop = of_get_property(np, sysc_dts_quirks[i].name, &len); + if (!prop) + break; + + ddata->cfg.quirks |= sysc_dts_quirks[i].mask; + } + + error = of_property_read_u32(np, "ti,sysc-delay-us", &val); + if (!error) { + if (val > 255) { + dev_warn(ddata->dev, "bad ti,sysc-delay-us: %i\n", + val); + } + + ddata->cfg.srst_udelay = (u8)val; + } + + return 0; +} + static void sysc_unprepare(struct sysc *ddata) { int i; @@ -474,9 +658,230 @@ static void sysc_unprepare(struct sysc *ddata) } } +/* + * Common sysc register bits found on omap2, also known as type1 + */ +static const struct sysc_regbits sysc_regbits_omap2 = { + .dmadisable_shift = -ENODEV, + .midle_shift = 12, + .sidle_shift = 3, + .clkact_shift = 8, + .emufree_shift = 5, + .enwkup_shift = 2, + .srst_shift = 1, + .autoidle_shift = 0, +}; + +static const struct sysc_capabilities sysc_omap2 = { + .type = TI_SYSC_OMAP2, + .sysc_mask = SYSC_OMAP2_CLOCKACTIVITY | SYSC_OMAP2_EMUFREE | + SYSC_OMAP2_ENAWAKEUP | SYSC_OMAP2_SOFTRESET | + SYSC_OMAP2_AUTOIDLE, + .regbits = &sysc_regbits_omap2, +}; + +/* All omap2 and 3 timers, and timers 1, 2 & 10 on omap 4 and 5 */ +static const struct sysc_capabilities sysc_omap2_timer = { + .type = TI_SYSC_OMAP2_TIMER, + .sysc_mask = SYSC_OMAP2_CLOCKACTIVITY | SYSC_OMAP2_EMUFREE | + SYSC_OMAP2_ENAWAKEUP | SYSC_OMAP2_SOFTRESET | + SYSC_OMAP2_AUTOIDLE, + .regbits = &sysc_regbits_omap2, + .mod_quirks = SYSC_QUIRK_USE_CLOCKACT, +}; + +/* + * SHAM2 (SHA1/MD5) sysc found on omap3, a variant of sysc_regbits_omap2 + * with different sidle position + */ +static const struct sysc_regbits sysc_regbits_omap3_sham = { + .dmadisable_shift = -ENODEV, + .midle_shift = -ENODEV, + .sidle_shift = 4, + .clkact_shift = -ENODEV, + .enwkup_shift = -ENODEV, + .srst_shift = 1, + .autoidle_shift = 0, + .emufree_shift = -ENODEV, +}; + +static const struct sysc_capabilities sysc_omap3_sham = { + .type = TI_SYSC_OMAP3_SHAM, + .sysc_mask = SYSC_OMAP2_SOFTRESET | SYSC_OMAP2_AUTOIDLE, + .regbits = &sysc_regbits_omap3_sham, +}; + +/* + * AES register bits found on omap3 and later, a variant of + * sysc_regbits_omap2 with different sidle position + */ +static const struct sysc_regbits sysc_regbits_omap3_aes = { + .dmadisable_shift = -ENODEV, + .midle_shift = -ENODEV, + .sidle_shift = 6, + .clkact_shift = -ENODEV, + .enwkup_shift = -ENODEV, + .srst_shift = 1, + .autoidle_shift = 0, + .emufree_shift = -ENODEV, +}; + +static const struct sysc_capabilities sysc_omap3_aes = { + .type = TI_SYSC_OMAP3_AES, + .sysc_mask = SYSC_OMAP2_SOFTRESET | SYSC_OMAP2_AUTOIDLE, + .regbits = &sysc_regbits_omap3_aes, +}; + +/* + * Common sysc register bits found on omap4, also known as type2 + */ +static const struct sysc_regbits sysc_regbits_omap4 = { + .dmadisable_shift = 16, + .midle_shift = 4, + .sidle_shift = 2, + .clkact_shift = -ENODEV, + .enwkup_shift = -ENODEV, + .emufree_shift = 1, + .srst_shift = 0, + .autoidle_shift = -ENODEV, +}; + +static const struct sysc_capabilities sysc_omap4 = { + .type = TI_SYSC_OMAP4, + .sysc_mask = SYSC_OMAP4_DMADISABLE | SYSC_OMAP4_FREEEMU | + SYSC_OMAP4_SOFTRESET, + .regbits = &sysc_regbits_omap4, +}; + +static const struct sysc_capabilities sysc_omap4_timer = { + .type = TI_SYSC_OMAP4_TIMER, + .sysc_mask = SYSC_OMAP4_DMADISABLE | SYSC_OMAP4_FREEEMU | + SYSC_OMAP4_SOFTRESET, + .regbits = &sysc_regbits_omap4, +}; + +/* + * Common sysc register bits found on omap4, also known as type3 + */ +static const struct sysc_regbits sysc_regbits_omap4_simple = { + .dmadisable_shift = -ENODEV, + .midle_shift = 2, + .sidle_shift = 0, + .clkact_shift = -ENODEV, + .enwkup_shift = -ENODEV, + .srst_shift = -ENODEV, + .emufree_shift = -ENODEV, + .autoidle_shift = -ENODEV, +}; + +static const struct sysc_capabilities sysc_omap4_simple = { + .type = TI_SYSC_OMAP4_SIMPLE, + .regbits = &sysc_regbits_omap4_simple, +}; + +/* + * SmartReflex sysc found on omap34xx + */ +static const struct sysc_regbits sysc_regbits_omap34xx_sr = { + .dmadisable_shift = -ENODEV, + .midle_shift = -ENODEV, + .sidle_shift = -ENODEV, + .clkact_shift = 20, + .enwkup_shift = -ENODEV, + .srst_shift = -ENODEV, + .emufree_shift = -ENODEV, + .autoidle_shift = -ENODEV, +}; + +static const struct sysc_capabilities sysc_34xx_sr = { + .type = TI_SYSC_OMAP34XX_SR, + .sysc_mask = SYSC_OMAP2_CLOCKACTIVITY, + .regbits = &sysc_regbits_omap34xx_sr, + .mod_quirks = SYSC_QUIRK_USE_CLOCKACT | SYSC_QUIRK_UNCACHED, +}; + +/* + * SmartReflex sysc found on omap36xx and later + */ +static const struct sysc_regbits sysc_regbits_omap36xx_sr = { + .dmadisable_shift = -ENODEV, + .midle_shift = -ENODEV, + .sidle_shift = 24, + .clkact_shift = -ENODEV, + .enwkup_shift = 26, + .srst_shift = -ENODEV, + .emufree_shift = -ENODEV, + .autoidle_shift = -ENODEV, +}; + +static const struct sysc_capabilities sysc_36xx_sr = { + .type = TI_SYSC_OMAP36XX_SR, + .sysc_mask = SYSC_OMAP2_ENAWAKEUP, + .regbits = &sysc_regbits_omap36xx_sr, + .mod_quirks = SYSC_QUIRK_UNCACHED, +}; + +static const struct sysc_capabilities sysc_omap4_sr = { + .type = TI_SYSC_OMAP4_SR, + .regbits = &sysc_regbits_omap36xx_sr, +}; + +/* + * McASP register bits found on omap4 and later + */ +static const struct sysc_regbits sysc_regbits_omap4_mcasp = { + .dmadisable_shift = -ENODEV, + .midle_shift = -ENODEV, + .sidle_shift = 0, + .clkact_shift = -ENODEV, + .enwkup_shift = -ENODEV, + .srst_shift = -ENODEV, + .emufree_shift = -ENODEV, + .autoidle_shift = -ENODEV, +}; + +static const struct sysc_capabilities sysc_omap4_mcasp = { + .type = TI_SYSC_OMAP4_MCASP, + .regbits = &sysc_regbits_omap4_mcasp, +}; + +/* + * FS USB host found on omap4 and later + */ +static const struct sysc_regbits sysc_regbits_omap4_usb_host_fs = { + .dmadisable_shift = -ENODEV, + .midle_shift = -ENODEV, + .sidle_shift = 24, + .clkact_shift = -ENODEV, + .enwkup_shift = 26, + .srst_shift = -ENODEV, + .emufree_shift = -ENODEV, + .autoidle_shift = -ENODEV, +}; + +static const struct sysc_capabilities sysc_omap4_usb_host_fs = { + .type = TI_SYSC_OMAP4_USB_HOST_FS, + .sysc_mask = SYSC_OMAP2_ENAWAKEUP, + .regbits = &sysc_regbits_omap4_usb_host_fs, +}; + +static int sysc_init_match(struct sysc *ddata) +{ + const struct sysc_capabilities *cap; + + cap = of_device_get_match_data(ddata->dev); + if (!cap) + return -EINVAL; + + ddata->cap = cap; + if (ddata->cap) + ddata->cfg.quirks |= ddata->cap->mod_quirks; + + return 0; +} + static int sysc_probe(struct platform_device *pdev) { - struct device_node *np = pdev->dev.of_node; struct sysc *ddata; int error; @@ -485,7 +890,15 @@ static int sysc_probe(struct platform_device *pdev) return -ENOMEM; ddata->dev = &pdev->dev; - ddata->legacy_mode = of_get_property(np, "ti,hwmods", NULL); + platform_set_drvdata(pdev, ddata); + + error = sysc_init_match(ddata); + if (error) + return error; + + error = sysc_init_dts_quirks(ddata); + if (error) + goto unprepare; error = sysc_get_clocks(ddata); if (error) @@ -495,9 +908,24 @@ static int sysc_probe(struct platform_device *pdev) if (error) goto unprepare; - platform_set_drvdata(pdev, ddata); + error = sysc_init_sysc_mask(ddata); + if (error) + goto unprepare; + + error = sysc_init_idlemodes(ddata); + if (error) + goto unprepare; + + error = sysc_init_syss_mask(ddata); + if (error) + goto unprepare; pm_runtime_enable(ddata->dev); + + error = sysc_init_module(ddata); + if (error) + goto unprepare; + error = pm_runtime_get_sync(ddata->dev); if (error < 0) { pm_runtime_put_noidle(ddata->dev); @@ -554,16 +982,19 @@ unprepare: } static const struct of_device_id sysc_match[] = { - { .compatible = "ti,sysc-omap2" }, - { .compatible = "ti,sysc-omap4" }, - { .compatible = "ti,sysc-omap4-simple" }, - { .compatible = "ti,sysc-omap3430-sr" }, - { .compatible = "ti,sysc-omap3630-sr" }, - { .compatible = "ti,sysc-omap4-sr" }, - { .compatible = "ti,sysc-omap3-sham" }, - { .compatible = "ti,sysc-omap-aes" }, - { .compatible = "ti,sysc-mcasp" }, - { .compatible = "ti,sysc-usb-host-fs" }, + { .compatible = "ti,sysc-omap2", .data = &sysc_omap2, }, + { .compatible = "ti,sysc-omap2-timer", .data = &sysc_omap2_timer, }, + { .compatible = "ti,sysc-omap4", .data = &sysc_omap4, }, + { .compatible = "ti,sysc-omap4-timer", .data = &sysc_omap4_timer, }, + { .compatible = "ti,sysc-omap4-simple", .data = &sysc_omap4_simple, }, + { .compatible = "ti,sysc-omap3430-sr", .data = &sysc_34xx_sr, }, + { .compatible = "ti,sysc-omap3630-sr", .data = &sysc_36xx_sr, }, + { .compatible = "ti,sysc-omap4-sr", .data = &sysc_omap4_sr, }, + { .compatible = "ti,sysc-omap3-sham", .data = &sysc_omap3_sham, }, + { .compatible = "ti,sysc-omap-aes", .data = &sysc_omap3_aes, }, + { .compatible = "ti,sysc-mcasp", .data = &sysc_omap4_mcasp, }, + { .compatible = "ti,sysc-usb-host-fs", + .data = &sysc_omap4_usb_host_fs, }, { }, }; MODULE_DEVICE_TABLE(of, sysc_match); diff --git a/include/dt-bindings/bus/ti-sysc.h b/include/dt-bindings/bus/ti-sysc.h new file mode 100644 index 000000000000..2c005376ac0e --- /dev/null +++ b/include/dt-bindings/bus/ti-sysc.h @@ -0,0 +1,22 @@ +/* TI sysc interconnect target module defines */ + +/* Generic sysc found on omap2 and later, also known as type1 */ +#define SYSC_OMAP2_CLOCKACTIVITY (3 << 8) +#define SYSC_OMAP2_EMUFREE (1 << 5) +#define SYSC_OMAP2_ENAWAKEUP (1 << 2) +#define SYSC_OMAP2_SOFTRESET (1 << 1) +#define SYSC_OMAP2_AUTOIDLE (1 << 0) + +/* Generic sysc found on omap4 and later, also known as type2 */ +#define SYSC_OMAP4_DMADISABLE (1 << 16) +#define SYSC_OMAP4_FREEEMU (1 << 1) /* Also known as EMUFREE */ +#define SYSC_OMAP4_SOFTRESET (1 << 0) + +/* SmartReflex sysc found on 36xx and later */ +#define SYSC_OMAP3_SR_ENAWAKEUP (1 << 26) + +/* SYSCONFIG STANDBYMODE/MIDLEMODE/SIDLEMODE supported by hardware */ +#define SYSC_IDLE_FORCE 0 +#define SYSC_IDLE_NO 1 +#define SYSC_IDLE_SMART 2 +#define SYSC_IDLE_SMART_WKUP 3 diff --git a/include/linux/platform_data/ti-sysc.h b/include/linux/platform_data/ti-sysc.h new file mode 100644 index 000000000000..1be356330b96 --- /dev/null +++ b/include/linux/platform_data/ti-sysc.h @@ -0,0 +1,86 @@ +#ifndef __TI_SYSC_DATA_H__ +#define __TI_SYSC_DATA_H__ + +enum ti_sysc_module_type { + TI_SYSC_OMAP2, + TI_SYSC_OMAP2_TIMER, + TI_SYSC_OMAP3_SHAM, + TI_SYSC_OMAP3_AES, + TI_SYSC_OMAP4, + TI_SYSC_OMAP4_TIMER, + TI_SYSC_OMAP4_SIMPLE, + TI_SYSC_OMAP34XX_SR, + TI_SYSC_OMAP36XX_SR, + TI_SYSC_OMAP4_SR, + TI_SYSC_OMAP4_MCASP, + TI_SYSC_OMAP4_USB_HOST_FS, +}; + +/** + * struct sysc_regbits - TI OCP_SYSCONFIG register field offsets + * @midle_shift: Offset of the midle bit + * @clkact_shift: Offset of the clockactivity bit + * @sidle_shift: Offset of the sidle bit + * @enwkup_shift: Offset of the enawakeup bit + * @srst_shift: Offset of the softreset bit + * @autoidle_shift: Offset of the autoidle bit + * @dmadisable_shift: Offset of the dmadisable bit + * @emufree_shift; Offset of the emufree bit + * + * Note that 0 is a valid shift, and for ti-sysc.c -ENODEV can be used if a + * feature is not available. + */ +struct sysc_regbits { + s8 midle_shift; + s8 clkact_shift; + s8 sidle_shift; + s8 enwkup_shift; + s8 srst_shift; + s8 autoidle_shift; + s8 dmadisable_shift; + s8 emufree_shift; +}; + +#define SYSC_QUIRK_RESET_STATUS BIT(7) +#define SYSC_QUIRK_NO_IDLE_ON_INIT BIT(6) +#define SYSC_QUIRK_NO_RESET_ON_INIT BIT(5) +#define SYSC_QUIRK_OPT_CLKS_NEEDED BIT(4) +#define SYSC_QUIRK_OPT_CLKS_IN_RESET BIT(3) +#define SYSC_QUIRK_16BIT BIT(2) +#define SYSC_QUIRK_UNCACHED BIT(1) +#define SYSC_QUIRK_USE_CLOCKACT BIT(0) + +#define SYSC_NR_IDLEMODES 4 + +/** + * struct sysc_capabilities - capabilities for an interconnect target module + * + * @sysc_mask: bitmask of supported SYSCONFIG register bits + * @regbits: bitmask of SYSCONFIG register bits + * @mod_quirks: bitmask of module specific quirks + */ +struct sysc_capabilities { + const enum ti_sysc_module_type type; + const u32 sysc_mask; + const struct sysc_regbits *regbits; + const u32 mod_quirks; +}; + +/** + * struct sysc_config - configuration for an interconnect target module + * @sysc_val: configured value for sysc register + * @midlemodes: bitmask of supported master idle modes + * @sidlemodes: bitmask of supported master idle modes + * @srst_udelay: optional delay needed after OCP soft reset + * @quirks: bitmask of enabled quirks + */ +struct sysc_config { + u32 sysc_val; + u32 syss_mask; + u8 midlemodes; + u8 sidlemodes; + u8 srst_udelay; + u32 quirks; +}; + +#endif /* __TI_SYSC_DATA_H__ */