| /* |
| * ti-sysc.c - Texas Instruments sysc interconnect target driver |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License version 2 as |
| * published by the Free Software Foundation. |
| * |
| * This program is distributed "as is" WITHOUT ANY WARRANTY of any |
| * kind, whether express or implied; without even the implied warranty |
| * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| * GNU General Public License for more details. |
| */ |
| |
| #include <linux/io.h> |
| #include <linux/clk.h> |
| #include <linux/clkdev.h> |
| #include <linux/delay.h> |
| #include <linux/module.h> |
| #include <linux/platform_device.h> |
| #include <linux/pm_domain.h> |
| #include <linux/pm_runtime.h> |
| #include <linux/reset.h> |
| #include <linux/of_address.h> |
| #include <linux/of_platform.h> |
| #include <linux/slab.h> |
| #include <linux/iopoll.h> |
| |
| #include <linux/platform_data/ti-sysc.h> |
| |
| #include <dt-bindings/bus/ti-sysc.h> |
| |
| #define MAX_MODULE_SOFTRESET_WAIT 10000 |
| |
| static const char * const reg_names[] = { "rev", "sysc", "syss", }; |
| |
| enum sysc_clocks { |
| SYSC_FCK, |
| SYSC_ICK, |
| SYSC_OPTFCK0, |
| SYSC_OPTFCK1, |
| SYSC_OPTFCK2, |
| SYSC_OPTFCK3, |
| SYSC_OPTFCK4, |
| SYSC_OPTFCK5, |
| SYSC_OPTFCK6, |
| SYSC_OPTFCK7, |
| SYSC_MAX_CLOCKS, |
| }; |
| |
| static const char * const clock_names[SYSC_MAX_CLOCKS] = { |
| "fck", "ick", "opt0", "opt1", "opt2", "opt3", "opt4", |
| "opt5", "opt6", "opt7", |
| }; |
| |
| #define SYSC_IDLEMODE_MASK 3 |
| #define SYSC_CLOCKACTIVITY_MASK 3 |
| |
| /** |
| * struct sysc - TI sysc interconnect target module registers and capabilities |
| * @dev: struct device pointer |
| * @module_pa: physical address of the interconnect target module |
| * @module_size: size of the interconnect target module |
| * @module_va: virtual address of the interconnect target module |
| * @offsets: register offsets from module base |
| * @clocks: clocks used by the interconnect target module |
| * @clock_roles: clock role names for the found clocks |
| * @nr_clocks: number of 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 |
| * @needs_resume: runtime resume needed on resume from suspend |
| * @clk_enable_quirk: module specific clock enable quirk |
| * @clk_disable_quirk: module specific clock disable quirk |
| * @reset_done_quirk: module specific reset done quirk |
| */ |
| struct sysc { |
| struct device *dev; |
| u64 module_pa; |
| u32 module_size; |
| void __iomem *module_va; |
| int offsets[SYSC_MAX_REGS]; |
| struct ti_sysc_module_data *mdata; |
| struct clk **clocks; |
| const char **clock_roles; |
| int nr_clocks; |
| struct reset_control *rsts; |
| const char *legacy_mode; |
| const struct sysc_capabilities *cap; |
| struct sysc_config cfg; |
| struct ti_sysc_cookie cookie; |
| const char *name; |
| u32 revision; |
| unsigned int enabled:1; |
| unsigned int needs_resume:1; |
| unsigned int child_needs_resume:1; |
| unsigned int disable_on_idle:1; |
| struct delayed_work idle_work; |
| void (*clk_enable_quirk)(struct sysc *sysc); |
| void (*clk_disable_quirk)(struct sysc *sysc); |
| void (*reset_done_quirk)(struct sysc *sysc); |
| }; |
| |
| static void sysc_parse_dts_quirks(struct sysc *ddata, struct device_node *np, |
| bool is_child); |
| |
| static void sysc_write(struct sysc *ddata, int offset, u32 value) |
| { |
| if (ddata->cfg.quirks & SYSC_QUIRK_16BIT) { |
| writew_relaxed(value & 0xffff, ddata->module_va + offset); |
| |
| /* Only i2c revision has LO and HI register with stride of 4 */ |
| if (ddata->offsets[SYSC_REVISION] >= 0 && |
| offset == ddata->offsets[SYSC_REVISION]) { |
| u16 hi = value >> 16; |
| |
| writew_relaxed(hi, ddata->module_va + offset + 4); |
| } |
| |
| return; |
| } |
| |
| writel_relaxed(value, ddata->module_va + offset); |
| } |
| |
| 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); |
| |
| /* Only i2c revision has LO and HI register with stride of 4 */ |
| if (ddata->offsets[SYSC_REVISION] >= 0 && |
| offset == ddata->offsets[SYSC_REVISION]) { |
| u16 tmp = readw_relaxed(ddata->module_va + offset + 4); |
| |
| val |= tmp << 16; |
| } |
| |
| return val; |
| } |
| |
| return readl_relaxed(ddata->module_va + offset); |
| } |
| |
| static bool sysc_opt_clks_needed(struct sysc *ddata) |
| { |
| return !!(ddata->cfg.quirks & SYSC_QUIRK_OPT_CLKS_NEEDED); |
| } |
| |
| static u32 sysc_read_revision(struct sysc *ddata) |
| { |
| int offset = ddata->offsets[SYSC_REVISION]; |
| |
| if (offset < 0) |
| return 0; |
| |
| return sysc_read(ddata, offset); |
| } |
| |
| static u32 sysc_read_sysconfig(struct sysc *ddata) |
| { |
| int offset = ddata->offsets[SYSC_SYSCONFIG]; |
| |
| if (offset < 0) |
| return 0; |
| |
| return sysc_read(ddata, offset); |
| } |
| |
| static u32 sysc_read_sysstatus(struct sysc *ddata) |
| { |
| int offset = ddata->offsets[SYSC_SYSSTATUS]; |
| |
| if (offset < 0) |
| return 0; |
| |
| return sysc_read(ddata, offset); |
| } |
| |
| static int sysc_add_named_clock_from_child(struct sysc *ddata, |
| const char *name, |
| const char *optfck_name) |
| { |
| struct device_node *np = ddata->dev->of_node; |
| struct device_node *child; |
| struct clk_lookup *cl; |
| struct clk *clock; |
| const char *n; |
| |
| if (name) |
| n = name; |
| else |
| n = optfck_name; |
| |
| /* Does the clock alias already exist? */ |
| clock = of_clk_get_by_name(np, n); |
| if (!IS_ERR(clock)) { |
| clk_put(clock); |
| |
| return 0; |
| } |
| |
| child = of_get_next_available_child(np, NULL); |
| if (!child) |
| return -ENODEV; |
| |
| clock = devm_get_clk_from_child(ddata->dev, child, name); |
| if (IS_ERR(clock)) |
| return PTR_ERR(clock); |
| |
| /* |
| * Use clkdev_add() instead of clkdev_alloc() to avoid the MAX_DEV_ID |
| * limit for clk_get(). If cl ever needs to be freed, it should be done |
| * with clkdev_drop(). |
| */ |
| cl = kcalloc(1, sizeof(*cl), GFP_KERNEL); |
| if (!cl) |
| return -ENOMEM; |
| |
| cl->con_id = n; |
| cl->dev_id = dev_name(ddata->dev); |
| cl->clk = clock; |
| clkdev_add(cl); |
| |
| clk_put(clock); |
| |
| return 0; |
| } |
| |
| static int sysc_init_ext_opt_clock(struct sysc *ddata, const char *name) |
| { |
| const char *optfck_name; |
| int error, index; |
| |
| if (ddata->nr_clocks < SYSC_OPTFCK0) |
| index = SYSC_OPTFCK0; |
| else |
| index = ddata->nr_clocks; |
| |
| if (name) |
| optfck_name = name; |
| else |
| optfck_name = clock_names[index]; |
| |
| error = sysc_add_named_clock_from_child(ddata, name, optfck_name); |
| if (error) |
| return error; |
| |
| ddata->clock_roles[index] = optfck_name; |
| ddata->nr_clocks++; |
| |
| return 0; |
| } |
| |
| static int sysc_get_one_clock(struct sysc *ddata, const char *name) |
| { |
| int error, i, index = -ENODEV; |
| |
| if (!strncmp(clock_names[SYSC_FCK], name, 3)) |
| index = SYSC_FCK; |
| else if (!strncmp(clock_names[SYSC_ICK], name, 3)) |
| index = SYSC_ICK; |
| |
| if (index < 0) { |
| for (i = SYSC_OPTFCK0; i < SYSC_MAX_CLOCKS; i++) { |
| if (!ddata->clocks[i]) { |
| index = i; |
| break; |
| } |
| } |
| } |
| |
| if (index < 0) { |
| dev_err(ddata->dev, "clock %s not added\n", name); |
| return index; |
| } |
| |
| ddata->clocks[index] = devm_clk_get(ddata->dev, name); |
| if (IS_ERR(ddata->clocks[index])) { |
| if (PTR_ERR(ddata->clocks[index]) == -ENOENT) |
| return 0; |
| |
| dev_err(ddata->dev, "clock get error for %s: %li\n", |
| name, PTR_ERR(ddata->clocks[index])); |
| |
| return PTR_ERR(ddata->clocks[index]); |
| } |
| |
| error = clk_prepare(ddata->clocks[index]); |
| if (error) { |
| dev_err(ddata->dev, "clock prepare error for %s: %i\n", |
| name, error); |
| |
| return error; |
| } |
| |
| return 0; |
| } |
| |
| static int sysc_get_clocks(struct sysc *ddata) |
| { |
| struct device_node *np = ddata->dev->of_node; |
| struct property *prop; |
| const char *name; |
| int nr_fck = 0, nr_ick = 0, i, error = 0; |
| |
| ddata->clock_roles = devm_kcalloc(ddata->dev, |
| SYSC_MAX_CLOCKS, |
| sizeof(*ddata->clock_roles), |
| GFP_KERNEL); |
| if (!ddata->clock_roles) |
| return -ENOMEM; |
| |
| of_property_for_each_string(np, "clock-names", prop, name) { |
| if (!strncmp(clock_names[SYSC_FCK], name, 3)) |
| nr_fck++; |
| if (!strncmp(clock_names[SYSC_ICK], name, 3)) |
| nr_ick++; |
| ddata->clock_roles[ddata->nr_clocks] = name; |
| ddata->nr_clocks++; |
| } |
| |
| if (ddata->nr_clocks < 1) |
| return 0; |
| |
| if ((ddata->cfg.quirks & SYSC_QUIRK_EXT_OPT_CLOCK)) { |
| error = sysc_init_ext_opt_clock(ddata, NULL); |
| if (error) |
| return error; |
| } |
| |
| if (ddata->nr_clocks > SYSC_MAX_CLOCKS) { |
| dev_err(ddata->dev, "too many clocks for %pOF\n", np); |
| |
| return -EINVAL; |
| } |
| |
| if (nr_fck > 1 || nr_ick > 1) { |
| dev_err(ddata->dev, "max one fck and ick for %pOF\n", np); |
| |
| return -EINVAL; |
| } |
| |
| ddata->clocks = devm_kcalloc(ddata->dev, |
| ddata->nr_clocks, sizeof(*ddata->clocks), |
| GFP_KERNEL); |
| if (!ddata->clocks) |
| return -ENOMEM; |
| |
| for (i = 0; i < SYSC_MAX_CLOCKS; i++) { |
| const char *name = ddata->clock_roles[i]; |
| |
| if (!name) |
| continue; |
| |
| error = sysc_get_one_clock(ddata, name); |
| if (error && error != -ENOENT) |
| return error; |
| } |
| |
| return 0; |
| } |
| |
| static int sysc_enable_main_clocks(struct sysc *ddata) |
| { |
| struct clk *clock; |
| int i, error; |
| |
| if (!ddata->clocks) |
| return 0; |
| |
| for (i = 0; i < SYSC_OPTFCK0; i++) { |
| clock = ddata->clocks[i]; |
| |
| /* Main clocks may not have ick */ |
| if (IS_ERR_OR_NULL(clock)) |
| continue; |
| |
| error = clk_enable(clock); |
| if (error) |
| goto err_disable; |
| } |
| |
| return 0; |
| |
| err_disable: |
| for (i--; i >= 0; i--) { |
| clock = ddata->clocks[i]; |
| |
| /* Main clocks may not have ick */ |
| if (IS_ERR_OR_NULL(clock)) |
| continue; |
| |
| clk_disable(clock); |
| } |
| |
| return error; |
| } |
| |
| static void sysc_disable_main_clocks(struct sysc *ddata) |
| { |
| struct clk *clock; |
| int i; |
| |
| if (!ddata->clocks) |
| return; |
| |
| for (i = 0; i < SYSC_OPTFCK0; i++) { |
| clock = ddata->clocks[i]; |
| if (IS_ERR_OR_NULL(clock)) |
| continue; |
| |
| clk_disable(clock); |
| } |
| } |
| |
| static int sysc_enable_opt_clocks(struct sysc *ddata) |
| { |
| struct clk *clock; |
| int i, error; |
| |
| if (!ddata->clocks) |
| return 0; |
| |
| for (i = SYSC_OPTFCK0; i < SYSC_MAX_CLOCKS; i++) { |
| clock = ddata->clocks[i]; |
| |
| /* Assume no holes for opt clocks */ |
| if (IS_ERR_OR_NULL(clock)) |
| return 0; |
| |
| error = clk_enable(clock); |
| if (error) |
| goto err_disable; |
| } |
| |
| return 0; |
| |
| err_disable: |
| for (i--; i >= 0; i--) { |
| clock = ddata->clocks[i]; |
| if (IS_ERR_OR_NULL(clock)) |
| continue; |
| |
| clk_disable(clock); |
| } |
| |
| return error; |
| } |
| |
| static void sysc_disable_opt_clocks(struct sysc *ddata) |
| { |
| struct clk *clock; |
| int i; |
| |
| if (!ddata->clocks) |
| return; |
| |
| for (i = SYSC_OPTFCK0; i < SYSC_MAX_CLOCKS; i++) { |
| clock = ddata->clocks[i]; |
| |
| /* Assume no holes for opt clocks */ |
| if (IS_ERR_OR_NULL(clock)) |
| return; |
| |
| clk_disable(clock); |
| } |
| } |
| |
| static void sysc_clkdm_deny_idle(struct sysc *ddata) |
| { |
| struct ti_sysc_platform_data *pdata; |
| |
| if (ddata->legacy_mode) |
| return; |
| |
| pdata = dev_get_platdata(ddata->dev); |
| if (pdata && pdata->clkdm_deny_idle) |
| pdata->clkdm_deny_idle(ddata->dev, &ddata->cookie); |
| } |
| |
| static void sysc_clkdm_allow_idle(struct sysc *ddata) |
| { |
| struct ti_sysc_platform_data *pdata; |
| |
| if (ddata->legacy_mode) |
| return; |
| |
| pdata = dev_get_platdata(ddata->dev); |
| if (pdata && pdata->clkdm_allow_idle) |
| pdata->clkdm_allow_idle(ddata->dev, &ddata->cookie); |
| } |
| |
| /** |
| * sysc_init_resets - init rstctrl reset line if configured |
| * @ddata: device driver data |
| * |
| * See sysc_rstctrl_reset_deassert(). |
| */ |
| static int sysc_init_resets(struct sysc *ddata) |
| { |
| ddata->rsts = |
| devm_reset_control_get_optional(ddata->dev, "rstctrl"); |
| if (IS_ERR(ddata->rsts)) |
| return PTR_ERR(ddata->rsts); |
| |
| return 0; |
| } |
| |
| /** |
| * sysc_parse_and_check_child_range - parses module IO region from ranges |
| * @ddata: device driver data |
| * |
| * In general we only need rev, syss, and sysc registers and not the whole |
| * module range. But we do want the offsets for these registers from the |
| * module base. This allows us to check them against the legacy hwmod |
| * platform data. Let's also check the ranges are configured properly. |
| */ |
| static int sysc_parse_and_check_child_range(struct sysc *ddata) |
| { |
| struct device_node *np = ddata->dev->of_node; |
| const __be32 *ranges; |
| u32 nr_addr, nr_size; |
| int len, error; |
| |
| ranges = of_get_property(np, "ranges", &len); |
| if (!ranges) { |
| dev_err(ddata->dev, "missing ranges for %pOF\n", np); |
| |
| return -ENOENT; |
| } |
| |
| len /= sizeof(*ranges); |
| |
| if (len < 3) { |
| dev_err(ddata->dev, "incomplete ranges for %pOF\n", np); |
| |
| return -EINVAL; |
| } |
| |
| error = of_property_read_u32(np, "#address-cells", &nr_addr); |
| if (error) |
| return -ENOENT; |
| |
| error = of_property_read_u32(np, "#size-cells", &nr_size); |
| if (error) |
| return -ENOENT; |
| |
| if (nr_addr != 1 || nr_size != 1) { |
| dev_err(ddata->dev, "invalid ranges for %pOF\n", np); |
| |
| return -EINVAL; |
| } |
| |
| ranges++; |
| ddata->module_pa = of_translate_address(np, ranges++); |
| ddata->module_size = be32_to_cpup(ranges); |
| |
| return 0; |
| } |
| |
| static struct device_node *stdout_path; |
| |
| static void sysc_init_stdout_path(struct sysc *ddata) |
| { |
| struct device_node *np = NULL; |
| const char *uart; |
| |
| if (IS_ERR(stdout_path)) |
| return; |
| |
| if (stdout_path) |
| return; |
| |
| np = of_find_node_by_path("/chosen"); |
| if (!np) |
| goto err; |
| |
| uart = of_get_property(np, "stdout-path", NULL); |
| if (!uart) |
| goto err; |
| |
| np = of_find_node_by_path(uart); |
| if (!np) |
| goto err; |
| |
| stdout_path = np; |
| |
| return; |
| |
| err: |
| stdout_path = ERR_PTR(-ENODEV); |
| } |
| |
| static void sysc_check_quirk_stdout(struct sysc *ddata, |
| struct device_node *np) |
| { |
| sysc_init_stdout_path(ddata); |
| if (np != stdout_path) |
| return; |
| |
| ddata->cfg.quirks |= SYSC_QUIRK_NO_IDLE_ON_INIT | |
| SYSC_QUIRK_NO_RESET_ON_INIT; |
| } |
| |
| /** |
| * sysc_check_one_child - check child configuration |
| * @ddata: device driver data |
| * @np: child device node |
| * |
| * Let's avoid messy situations where we have new interconnect target |
| * node but children have "ti,hwmods". These belong to the interconnect |
| * target node and are managed by this driver. |
| */ |
| static int sysc_check_one_child(struct sysc *ddata, |
| struct device_node *np) |
| { |
| const char *name; |
| |
| name = of_get_property(np, "ti,hwmods", NULL); |
| if (name) |
| dev_warn(ddata->dev, "really a child ti,hwmods property?"); |
| |
| sysc_check_quirk_stdout(ddata, np); |
| sysc_parse_dts_quirks(ddata, np, true); |
| |
| return 0; |
| } |
| |
| static int sysc_check_children(struct sysc *ddata) |
| { |
| struct device_node *child; |
| int error; |
| |
| for_each_child_of_node(ddata->dev->of_node, child) { |
| error = sysc_check_one_child(ddata, child); |
| if (error) |
| return error; |
| } |
| |
| 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) |
| ddata->cfg.quirks |= SYSC_QUIRK_16BIT | SYSC_QUIRK_USE_CLOCKACT; |
| } |
| |
| /** |
| * sysc_parse_one - parses the interconnect target module registers |
| * @ddata: device driver data |
| * @reg: register to parse |
| */ |
| static int sysc_parse_one(struct sysc *ddata, enum sysc_registers reg) |
| { |
| struct resource *res; |
| const char *name; |
| |
| switch (reg) { |
| case SYSC_REVISION: |
| case SYSC_SYSCONFIG: |
| case SYSC_SYSSTATUS: |
| name = reg_names[reg]; |
| break; |
| default: |
| return -EINVAL; |
| } |
| |
| res = platform_get_resource_byname(to_platform_device(ddata->dev), |
| IORESOURCE_MEM, name); |
| if (!res) { |
| ddata->offsets[reg] = -ENODEV; |
| |
| return 0; |
| } |
| |
| ddata->offsets[reg] = res->start - ddata->module_pa; |
| if (reg == SYSC_REVISION) |
| sysc_check_quirk_16bit(ddata, res); |
| |
| return 0; |
| } |
| |
| static int sysc_parse_registers(struct sysc *ddata) |
| { |
| int i, error; |
| |
| for (i = 0; i < SYSC_MAX_REGS; i++) { |
| error = sysc_parse_one(ddata, i); |
| if (error) |
| return error; |
| } |
| |
| return 0; |
| } |
| |
| /** |
| * sysc_check_registers - check for misconfigured register overlaps |
| * @ddata: device driver data |
| */ |
| static int sysc_check_registers(struct sysc *ddata) |
| { |
| int i, j, nr_regs = 0, nr_matches = 0; |
| |
| for (i = 0; i < SYSC_MAX_REGS; i++) { |
| if (ddata->offsets[i] < 0) |
| continue; |
| |
| if (ddata->offsets[i] > (ddata->module_size - 4)) { |
| dev_err(ddata->dev, "register outside module range"); |
| |
| return -EINVAL; |
| } |
| |
| for (j = 0; j < SYSC_MAX_REGS; j++) { |
| if (ddata->offsets[j] < 0) |
| continue; |
| |
| if (ddata->offsets[i] == ddata->offsets[j]) |
| nr_matches++; |
| } |
| nr_regs++; |
| } |
| |
| if (nr_matches > nr_regs) { |
| dev_err(ddata->dev, "overlapping registers: (%i/%i)", |
| nr_regs, nr_matches); |
| |
| return -EINVAL; |
| } |
| |
| return 0; |
| } |
| |
| /** |
| * syc_ioremap - ioremap register space for the interconnect target module |
| * @ddata: device driver data |
| * |
| * Note that the interconnect target module registers can be anywhere |
| * within the interconnect target module range. For example, SGX has |
| * them at offset 0x1fc00 in the 32MB module address space. And cpsw |
| * has them at offset 0x1200 in the CPSW_WR child. Usually the |
| * the interconnect target module registers are at the beginning of |
| * the module range though. |
| */ |
| static int sysc_ioremap(struct sysc *ddata) |
| { |
| int size; |
| |
| if (ddata->offsets[SYSC_REVISION] < 0 && |
| ddata->offsets[SYSC_SYSCONFIG] < 0 && |
| ddata->offsets[SYSC_SYSSTATUS] < 0) { |
| size = ddata->module_size; |
| } else { |
| size = max3(ddata->offsets[SYSC_REVISION], |
| ddata->offsets[SYSC_SYSCONFIG], |
| ddata->offsets[SYSC_SYSSTATUS]); |
| |
| if (size < SZ_1K) |
| size = SZ_1K; |
| |
| if ((size + sizeof(u32)) > ddata->module_size) |
| size = ddata->module_size; |
| } |
| |
| ddata->module_va = devm_ioremap(ddata->dev, |
| ddata->module_pa, |
| size + sizeof(u32)); |
| if (!ddata->module_va) |
| return -EIO; |
| |
| return 0; |
| } |
| |
| /** |
| * sysc_map_and_check_registers - ioremap and check device registers |
| * @ddata: device driver data |
| */ |
| static int sysc_map_and_check_registers(struct sysc *ddata) |
| { |
| int error; |
| |
| error = sysc_parse_and_check_child_range(ddata); |
| if (error) |
| return error; |
| |
| error = sysc_check_children(ddata); |
| if (error) |
| return error; |
| |
| error = sysc_parse_registers(ddata); |
| if (error) |
| return error; |
| |
| error = sysc_ioremap(ddata); |
| if (error) |
| return error; |
| |
| error = sysc_check_registers(ddata); |
| if (error) |
| return error; |
| |
| return 0; |
| } |
| |
| /** |
| * sysc_show_rev - read and show interconnect target module revision |
| * @bufp: buffer to print the information to |
| * @ddata: device driver data |
| */ |
| static int sysc_show_rev(char *bufp, struct sysc *ddata) |
| { |
| int len; |
| |
| if (ddata->offsets[SYSC_REVISION] < 0) |
| return sprintf(bufp, ":NA"); |
| |
| len = sprintf(bufp, ":%08x", ddata->revision); |
| |
| return len; |
| } |
| |
| static int sysc_show_reg(struct sysc *ddata, |
| char *bufp, enum sysc_registers reg) |
| { |
| if (ddata->offsets[reg] < 0) |
| return sprintf(bufp, ":NA"); |
| |
| return sprintf(bufp, ":%x", ddata->offsets[reg]); |
| } |
| |
| static int sysc_show_name(char *bufp, struct sysc *ddata) |
| { |
| if (!ddata->name) |
| return 0; |
| |
| return sprintf(bufp, ":%s", ddata->name); |
| } |
| |
| /** |
| * sysc_show_registers - show information about interconnect target module |
| * @ddata: device driver data |
| */ |
| static void sysc_show_registers(struct sysc *ddata) |
| { |
| char buf[128]; |
| char *bufp = buf; |
| int i; |
| |
| for (i = 0; i < SYSC_MAX_REGS; i++) |
| bufp += sysc_show_reg(ddata, bufp, i); |
| |
| bufp += sysc_show_rev(bufp, ddata); |
| bufp += sysc_show_name(bufp, ddata); |
| |
| dev_dbg(ddata->dev, "%llx:%x%s\n", |
| ddata->module_pa, ddata->module_size, |
| buf); |
| } |
| |
| #define SYSC_IDLE_MASK (SYSC_NR_IDLEMODES - 1) |
| #define SYSC_CLOCACT_ICK 2 |
| |
| /* Caller needs to manage sysc_clkdm_deny_idle() and sysc_clkdm_allow_idle() */ |
| static int sysc_enable_module(struct device *dev) |
| { |
| struct sysc *ddata; |
| const struct sysc_regbits *regbits; |
| u32 reg, idlemodes, best_mode; |
| |
| ddata = dev_get_drvdata(dev); |
| if (ddata->offsets[SYSC_SYSCONFIG] == -ENODEV) |
| return 0; |
| |
| regbits = ddata->cap->regbits; |
| reg = sysc_read(ddata, ddata->offsets[SYSC_SYSCONFIG]); |
| |
| /* Set CLOCKACTIVITY, we only use it for ick */ |
| if (regbits->clkact_shift >= 0 && |
| (ddata->cfg.quirks & SYSC_QUIRK_USE_CLOCKACT || |
| ddata->cfg.sysc_val & BIT(regbits->clkact_shift))) |
| reg |= SYSC_CLOCACT_ICK << regbits->clkact_shift; |
| |
| /* Set SIDLE mode */ |
| idlemodes = ddata->cfg.sidlemodes; |
| if (!idlemodes || regbits->sidle_shift < 0) |
| goto set_midle; |
| |
| if (ddata->cfg.quirks & (SYSC_QUIRK_SWSUP_SIDLE | |
| SYSC_QUIRK_SWSUP_SIDLE_ACT)) { |
| best_mode = SYSC_IDLE_NO; |
| } else { |
| best_mode = fls(ddata->cfg.sidlemodes) - 1; |
| if (best_mode > SYSC_IDLE_MASK) { |
| dev_err(dev, "%s: invalid sidlemode\n", __func__); |
| return -EINVAL; |
| } |
| |
| /* Set WAKEUP */ |
| if (regbits->enwkup_shift >= 0 && |
| ddata->cfg.sysc_val & BIT(regbits->enwkup_shift)) |
| reg |= BIT(regbits->enwkup_shift); |
| } |
| |
| reg &= ~(SYSC_IDLE_MASK << regbits->sidle_shift); |
| reg |= best_mode << regbits->sidle_shift; |
| sysc_write(ddata, ddata->offsets[SYSC_SYSCONFIG], reg); |
| |
| set_midle: |
| /* Set MIDLE mode */ |
| idlemodes = ddata->cfg.midlemodes; |
| if (!idlemodes || regbits->midle_shift < 0) |
| goto set_autoidle; |
| |
| best_mode = fls(ddata->cfg.midlemodes) - 1; |
| if (best_mode > SYSC_IDLE_MASK) { |
| dev_err(dev, "%s: invalid midlemode\n", __func__); |
| return -EINVAL; |
| } |
| |
| reg &= ~(SYSC_IDLE_MASK << regbits->midle_shift); |
| reg |= best_mode << regbits->midle_shift; |
| sysc_write(ddata, ddata->offsets[SYSC_SYSCONFIG], reg); |
| |
| set_autoidle: |
| /* Autoidle bit must enabled separately if available */ |
| if (regbits->autoidle_shift >= 0 && |
| ddata->cfg.sysc_val & BIT(regbits->autoidle_shift)) { |
| reg |= 1 << regbits->autoidle_shift; |
| sysc_write(ddata, ddata->offsets[SYSC_SYSCONFIG], reg); |
| } |
| |
| return 0; |
| } |
| |
| static int sysc_best_idle_mode(u32 idlemodes, u32 *best_mode) |
| { |
| if (idlemodes & BIT(SYSC_IDLE_SMART_WKUP)) |
| *best_mode = SYSC_IDLE_SMART_WKUP; |
| else if (idlemodes & BIT(SYSC_IDLE_SMART)) |
| *best_mode = SYSC_IDLE_SMART; |
| else if (idlemodes & BIT(SYSC_IDLE_FORCE)) |
| *best_mode = SYSC_IDLE_FORCE; |
| else |
| return -EINVAL; |
| |
| return 0; |
| } |
| |
| /* Caller needs to manage sysc_clkdm_deny_idle() and sysc_clkdm_allow_idle() */ |
| static int sysc_disable_module(struct device *dev) |
| { |
| struct sysc *ddata; |
| const struct sysc_regbits *regbits; |
| u32 reg, idlemodes, best_mode; |
| int ret; |
| |
| ddata = dev_get_drvdata(dev); |
| if (ddata->offsets[SYSC_SYSCONFIG] == -ENODEV) |
| return 0; |
| |
| regbits = ddata->cap->regbits; |
| reg = sysc_read(ddata, ddata->offsets[SYSC_SYSCONFIG]); |
| |
| /* Set MIDLE mode */ |
| idlemodes = ddata->cfg.midlemodes; |
| if (!idlemodes || regbits->midle_shift < 0) |
| goto set_sidle; |
| |
| ret = sysc_best_idle_mode(idlemodes, &best_mode); |
| if (ret) { |
| dev_err(dev, "%s: invalid midlemode\n", __func__); |
| return ret; |
| } |
| |
| reg &= ~(SYSC_IDLE_MASK << regbits->midle_shift); |
| reg |= best_mode << regbits->midle_shift; |
| sysc_write(ddata, ddata->offsets[SYSC_SYSCONFIG], reg); |
| |
| set_sidle: |
| /* Set SIDLE mode */ |
| idlemodes = ddata->cfg.sidlemodes; |
| if (!idlemodes || regbits->sidle_shift < 0) |
| return 0; |
| |
| if (ddata->cfg.quirks & SYSC_QUIRK_SWSUP_SIDLE) { |
| best_mode = SYSC_IDLE_FORCE; |
| } else { |
| ret = sysc_best_idle_mode(idlemodes, &best_mode); |
| if (ret) { |
| dev_err(dev, "%s: invalid sidlemode\n", __func__); |
| return ret; |
| } |
| } |
| |
| reg &= ~(SYSC_IDLE_MASK << regbits->sidle_shift); |
| reg |= best_mode << regbits->sidle_shift; |
| if (regbits->autoidle_shift >= 0 && |
| ddata->cfg.sysc_val & BIT(regbits->autoidle_shift)) |
| reg |= 1 << regbits->autoidle_shift; |
| sysc_write(ddata, ddata->offsets[SYSC_SYSCONFIG], reg); |
| |
| return 0; |
| } |
| |
| static int __maybe_unused sysc_runtime_suspend_legacy(struct device *dev, |
| struct sysc *ddata) |
| { |
| struct ti_sysc_platform_data *pdata; |
| int error; |
| |
| pdata = dev_get_platdata(ddata->dev); |
| if (!pdata) |
| return 0; |
| |
| if (!pdata->idle_module) |
| return -ENODEV; |
| |
| error = pdata->idle_module(dev, &ddata->cookie); |
| if (error) |
| dev_err(dev, "%s: could not idle: %i\n", |
| __func__, error); |
| |
| if (ddata->disable_on_idle) |
| reset_control_assert(ddata->rsts); |
| |
| return 0; |
| } |
| |
| static int __maybe_unused sysc_runtime_resume_legacy(struct device *dev, |
| struct sysc *ddata) |
| { |
| struct ti_sysc_platform_data *pdata; |
| int error; |
| |
| if (ddata->disable_on_idle) |
| reset_control_deassert(ddata->rsts); |
| |
| pdata = dev_get_platdata(ddata->dev); |
| if (!pdata) |
| return 0; |
| |
| if (!pdata->enable_module) |
| return -ENODEV; |
| |
| error = pdata->enable_module(dev, &ddata->cookie); |
| if (error) |
| dev_err(dev, "%s: could not enable: %i\n", |
| __func__, error); |
| |
| return 0; |
| } |
| |
| static int __maybe_unused sysc_runtime_suspend(struct device *dev) |
| { |
| struct sysc *ddata; |
| int error = 0; |
| |
| ddata = dev_get_drvdata(dev); |
| |
| if (!ddata->enabled) |
| return 0; |
| |
| sysc_clkdm_deny_idle(ddata); |
| |
| if (ddata->legacy_mode) { |
| error = sysc_runtime_suspend_legacy(dev, ddata); |
| if (error) |
| goto err_allow_idle; |
| } else { |
| error = sysc_disable_module(dev); |
| if (error) |
| goto err_allow_idle; |
| } |
| |
| sysc_disable_main_clocks(ddata); |
| |
| if (sysc_opt_clks_needed(ddata)) |
| sysc_disable_opt_clocks(ddata); |
| |
| ddata->enabled = false; |
| |
| err_allow_idle: |
| sysc_clkdm_allow_idle(ddata); |
| |
| if (ddata->disable_on_idle) |
| reset_control_assert(ddata->rsts); |
| |
| return error; |
| } |
| |
| static int __maybe_unused sysc_runtime_resume(struct device *dev) |
| { |
| struct sysc *ddata; |
| int error = 0; |
| |
| ddata = dev_get_drvdata(dev); |
| |
| if (ddata->enabled) |
| return 0; |
| |
| if (ddata->disable_on_idle) |
| reset_control_deassert(ddata->rsts); |
| |
| sysc_clkdm_deny_idle(ddata); |
| |
| if (sysc_opt_clks_needed(ddata)) { |
| error = sysc_enable_opt_clocks(ddata); |
| if (error) |
| goto err_allow_idle; |
| } |
| |
| error = sysc_enable_main_clocks(ddata); |
| if (error) |
| goto err_opt_clocks; |
| |
| if (ddata->legacy_mode) { |
| error = sysc_runtime_resume_legacy(dev, ddata); |
| if (error) |
| goto err_main_clocks; |
| } else { |
| error = sysc_enable_module(dev); |
| if (error) |
| goto err_main_clocks; |
| } |
| |
| ddata->enabled = true; |
| |
| sysc_clkdm_allow_idle(ddata); |
| |
| return 0; |
| |
| err_main_clocks: |
| sysc_disable_main_clocks(ddata); |
| err_opt_clocks: |
| if (sysc_opt_clks_needed(ddata)) |
| sysc_disable_opt_clocks(ddata); |
| err_allow_idle: |
| sysc_clkdm_allow_idle(ddata); |
| |
| return error; |
| } |
| |
| static int __maybe_unused sysc_noirq_suspend(struct device *dev) |
| { |
| struct sysc *ddata; |
| |
| ddata = dev_get_drvdata(dev); |
| |
| if (ddata->cfg.quirks & SYSC_QUIRK_LEGACY_IDLE) |
| return 0; |
| |
| return pm_runtime_force_suspend(dev); |
| } |
| |
| static int __maybe_unused sysc_noirq_resume(struct device *dev) |
| { |
| struct sysc *ddata; |
| |
| ddata = dev_get_drvdata(dev); |
| |
| if (ddata->cfg.quirks & SYSC_QUIRK_LEGACY_IDLE) |
| return 0; |
| |
| return pm_runtime_force_resume(dev); |
| } |
| |
| static const struct dev_pm_ops sysc_pm_ops = { |
| SET_NOIRQ_SYSTEM_SLEEP_PM_OPS(sysc_noirq_suspend, sysc_noirq_resume) |
| SET_RUNTIME_PM_OPS(sysc_runtime_suspend, |
| sysc_runtime_resume, |
| NULL) |
| }; |
| |
| /* Module revision register based quirks */ |
| struct sysc_revision_quirk { |
| const char *name; |
| u32 base; |
| int rev_offset; |
| int sysc_offset; |
| int syss_offset; |
| u32 revision; |
| u32 revision_mask; |
| u32 quirks; |
| }; |
| |
| #define SYSC_QUIRK(optname, optbase, optrev, optsysc, optsyss, \ |
| optrev_val, optrevmask, optquirkmask) \ |
| { \ |
| .name = (optname), \ |
| .base = (optbase), \ |
| .rev_offset = (optrev), \ |
| .sysc_offset = (optsysc), \ |
| .syss_offset = (optsyss), \ |
| .revision = (optrev_val), \ |
| .revision_mask = (optrevmask), \ |
| .quirks = (optquirkmask), \ |
| } |
| |
| static const struct sysc_revision_quirk sysc_revision_quirks[] = { |
| /* These drivers need to be fixed to not use pm_runtime_irq_safe() */ |
| SYSC_QUIRK("gpio", 0, 0, 0x10, 0x114, 0x50600801, 0xffff00ff, |
| SYSC_QUIRK_LEGACY_IDLE | SYSC_QUIRK_OPT_CLKS_IN_RESET), |
| SYSC_QUIRK("mmu", 0, 0, 0x10, 0x14, 0x00000020, 0xffffffff, |
| SYSC_QUIRK_LEGACY_IDLE), |
| SYSC_QUIRK("mmu", 0, 0, 0x10, 0x14, 0x00000030, 0xffffffff, |
| SYSC_QUIRK_LEGACY_IDLE), |
| SYSC_QUIRK("sham", 0, 0x100, 0x110, 0x114, 0x40000c03, 0xffffffff, |
| SYSC_QUIRK_LEGACY_IDLE), |
| SYSC_QUIRK("smartreflex", 0, -1, 0x24, -1, 0x00000000, 0xffffffff, |
| SYSC_QUIRK_LEGACY_IDLE), |
| SYSC_QUIRK("smartreflex", 0, -1, 0x38, -1, 0x00000000, 0xffffffff, |
| SYSC_QUIRK_LEGACY_IDLE), |
| SYSC_QUIRK("timer", 0, 0, 0x10, 0x14, 0x00000015, 0xffffffff, |
| 0), |
| /* Some timers on omap4 and later */ |
| SYSC_QUIRK("timer", 0, 0, 0x10, -1, 0x50002100, 0xffffffff, |
| 0), |
| SYSC_QUIRK("timer", 0, 0, 0x10, -1, 0x4fff1301, 0xffff00ff, |
| 0), |
| SYSC_QUIRK("uart", 0, 0x50, 0x54, 0x58, 0x00000046, 0xffffffff, |
| SYSC_QUIRK_SWSUP_SIDLE | SYSC_QUIRK_LEGACY_IDLE), |
| SYSC_QUIRK("uart", 0, 0x50, 0x54, 0x58, 0x00000052, 0xffffffff, |
| SYSC_QUIRK_SWSUP_SIDLE | SYSC_QUIRK_LEGACY_IDLE), |
| /* Uarts on omap4 and later */ |
| SYSC_QUIRK("uart", 0, 0x50, 0x54, 0x58, 0x50411e03, 0xffff00ff, |
| SYSC_QUIRK_SWSUP_SIDLE_ACT | SYSC_QUIRK_LEGACY_IDLE), |
| SYSC_QUIRK("uart", 0, 0x50, 0x54, 0x58, 0x47422e03, 0xffffffff, |
| SYSC_QUIRK_SWSUP_SIDLE_ACT | SYSC_QUIRK_LEGACY_IDLE), |
| |
| /* Quirks that need to be set based on the module address */ |
| SYSC_QUIRK("mcpdm", 0x40132000, 0, 0x10, -1, 0x50000800, 0xffffffff, |
| SYSC_QUIRK_EXT_OPT_CLOCK | SYSC_QUIRK_NO_RESET_ON_INIT | |
| SYSC_QUIRK_SWSUP_SIDLE), |
| |
| /* Quirks that need to be set based on detected module */ |
| SYSC_QUIRK("hdq1w", 0, 0, 0x14, 0x18, 0x00000006, 0xffffffff, |
| SYSC_MODULE_QUIRK_HDQ1W), |
| SYSC_QUIRK("hdq1w", 0, 0, 0x14, 0x18, 0x0000000a, 0xffffffff, |
| SYSC_MODULE_QUIRK_HDQ1W), |
| SYSC_QUIRK("i2c", 0, 0, 0x20, 0x10, 0x00000036, 0x000000ff, |
| SYSC_MODULE_QUIRK_I2C), |
| SYSC_QUIRK("i2c", 0, 0, 0x20, 0x10, 0x0000003c, 0x000000ff, |
| SYSC_MODULE_QUIRK_I2C), |
| SYSC_QUIRK("i2c", 0, 0, 0x20, 0x10, 0x00000040, 0x000000ff, |
| SYSC_MODULE_QUIRK_I2C), |
| SYSC_QUIRK("i2c", 0, 0, 0x10, 0x90, 0x5040000a, 0xfffff0f0, |
| SYSC_MODULE_QUIRK_I2C), |
| SYSC_QUIRK("wdt", 0, 0, 0x10, 0x14, 0x502a0500, 0xfffff0f0, |
| SYSC_MODULE_QUIRK_WDT), |
| |
| #ifdef DEBUG |
| SYSC_QUIRK("adc", 0, 0, 0x10, -1, 0x47300001, 0xffffffff, 0), |
| SYSC_QUIRK("atl", 0, 0, -1, -1, 0x0a070100, 0xffffffff, 0), |
| SYSC_QUIRK("aess", 0, 0, 0x10, -1, 0x40000000, 0xffffffff, 0), |
| SYSC_QUIRK("cm", 0, 0, -1, -1, 0x40000301, 0xffffffff, 0), |
| SYSC_QUIRK("control", 0, 0, 0x10, -1, 0x40000900, 0xffffffff, 0), |
| SYSC_QUIRK("cpgmac", 0, 0x1200, 0x1208, 0x1204, 0x4edb1902, |
| 0xffff00f0, 0), |
| SYSC_QUIRK("dcan", 0, 0x20, -1, -1, 0xa3170504, 0xffffffff, 0), |
| SYSC_QUIRK("dcan", 0, 0x20, -1, -1, 0x4edb1902, 0xffffffff, 0), |
| SYSC_QUIRK("dmic", 0, 0, 0x10, -1, 0x50010000, 0xffffffff, 0), |
| SYSC_QUIRK("dwc3", 0, 0, 0x10, -1, 0x500a0200, 0xffffffff, 0), |
| SYSC_QUIRK("epwmss", 0, 0, 0x4, -1, 0x47400001, 0xffffffff, 0), |
| SYSC_QUIRK("gpu", 0, 0x1fc00, 0x1fc10, -1, 0, 0, 0), |
| SYSC_QUIRK("hsi", 0, 0, 0x10, 0x14, 0x50043101, 0xffffffff, 0), |
| SYSC_QUIRK("iss", 0, 0, 0x10, -1, 0x40000101, 0xffffffff, 0), |
| SYSC_QUIRK("lcdc", 0, 0, 0x54, -1, 0x4f201000, 0xffffffff, 0), |
| SYSC_QUIRK("mcasp", 0, 0, 0x4, -1, 0x44306302, 0xffffffff, 0), |
| SYSC_QUIRK("mcasp", 0, 0, 0x4, -1, 0x44307b02, 0xffffffff, 0), |
| SYSC_QUIRK("mcbsp", 0, -1, 0x8c, -1, 0, 0, 0), |
| SYSC_QUIRK("mcspi", 0, 0, 0x10, -1, 0x40300a0b, 0xffff00ff, 0), |
| SYSC_QUIRK("mcspi", 0, 0, 0x110, 0x114, 0x40300a0b, 0xffffffff, 0), |
| SYSC_QUIRK("mailbox", 0, 0, 0x10, -1, 0x00000400, 0xffffffff, 0), |
| SYSC_QUIRK("m3", 0, 0, -1, -1, 0x5f580105, 0x0fff0f00, 0), |
| SYSC_QUIRK("ocp2scp", 0, 0, 0x10, 0x14, 0x50060005, 0xfffffff0, 0), |
| SYSC_QUIRK("ocp2scp", 0, 0, -1, -1, 0x50060007, 0xffffffff, 0), |
| SYSC_QUIRK("padconf", 0, 0, 0x10, -1, 0x4fff0800, 0xffffffff, 0), |
| SYSC_QUIRK("padconf", 0, 0, -1, -1, 0x40001100, 0xffffffff, 0), |
| SYSC_QUIRK("prcm", 0, 0, -1, -1, 0x40000100, 0xffffffff, 0), |
| SYSC_QUIRK("prcm", 0, 0, -1, -1, 0x00004102, 0xffffffff, 0), |
| SYSC_QUIRK("prcm", 0, 0, -1, -1, 0x40000400, 0xffffffff, 0), |
| SYSC_QUIRK("scm", 0, 0, 0x10, -1, 0x40000900, 0xffffffff, 0), |
| SYSC_QUIRK("scm", 0, 0, -1, -1, 0x4e8b0100, 0xffffffff, 0), |
| SYSC_QUIRK("scm", 0, 0, -1, -1, 0x4f000100, 0xffffffff, 0), |
| SYSC_QUIRK("scm", 0, 0, -1, -1, 0x40000900, 0xffffffff, 0), |
| SYSC_QUIRK("scrm", 0, 0, -1, -1, 0x00000010, 0xffffffff, 0), |
| SYSC_QUIRK("sdio", 0, 0, 0x10, -1, 0x40202301, 0xffff0ff0, 0), |
| SYSC_QUIRK("sdio", 0, 0x2fc, 0x110, 0x114, 0x31010000, 0xffffffff, 0), |
| SYSC_QUIRK("sdma", 0, 0, 0x2c, 0x28, 0x00010900, 0xffffffff, 0), |
| SYSC_QUIRK("slimbus", 0, 0, 0x10, -1, 0x40000902, 0xffffffff, 0), |
| SYSC_QUIRK("slimbus", 0, 0, 0x10, -1, 0x40002903, 0xffffffff, 0), |
| SYSC_QUIRK("spinlock", 0, 0, 0x10, -1, 0x50020000, 0xffffffff, 0), |
| SYSC_QUIRK("rng", 0, 0x1fe0, 0x1fe4, -1, 0x00000020, 0xffffffff, 0), |
| SYSC_QUIRK("rtc", 0, 0x74, 0x78, -1, 0x4eb01908, 0xffff00f0, 0), |
| SYSC_QUIRK("timer32k", 0, 0, 0x4, -1, 0x00000060, 0xffffffff, 0), |
| SYSC_QUIRK("usbhstll", 0, 0, 0x10, 0x14, 0x00000004, 0xffffffff, 0), |
| SYSC_QUIRK("usbhstll", 0, 0, 0x10, 0x14, 0x00000008, 0xffffffff, 0), |
| SYSC_QUIRK("usb_host_hs", 0, 0, 0x10, 0x14, 0x50700100, 0xffffffff, 0), |
| SYSC_QUIRK("usb_host_hs", 0, 0, 0x10, -1, 0x50700101, 0xffffffff, 0), |
| SYSC_QUIRK("usb_otg_hs", 0, 0x400, 0x404, 0x408, 0x00000050, |
| 0xffffffff, 0), |
| SYSC_QUIRK("vfpe", 0, 0, 0x104, -1, 0x4d001200, 0xffffffff, 0), |
| #endif |
| }; |
| |
| /* |
| * Early quirks based on module base and register offsets only that are |
| * needed before the module revision can be read |
| */ |
| static void sysc_init_early_quirks(struct sysc *ddata) |
| { |
| const struct sysc_revision_quirk *q; |
| int i; |
| |
| for (i = 0; i < ARRAY_SIZE(sysc_revision_quirks); i++) { |
| q = &sysc_revision_quirks[i]; |
| |
| if (!q->base) |
| continue; |
| |
| if (q->base != ddata->module_pa) |
| continue; |
| |
| if (q->rev_offset >= 0 && |
| q->rev_offset != ddata->offsets[SYSC_REVISION]) |
| continue; |
| |
| if (q->sysc_offset >= 0 && |
| q->sysc_offset != ddata->offsets[SYSC_SYSCONFIG]) |
| continue; |
| |
| if (q->syss_offset >= 0 && |
| q->syss_offset != ddata->offsets[SYSC_SYSSTATUS]) |
| continue; |
| |
| ddata->name = q->name; |
| ddata->cfg.quirks |= q->quirks; |
| } |
| } |
| |
| /* Quirks that also consider the revision register value */ |
| static void sysc_init_revision_quirks(struct sysc *ddata) |
| { |
| const struct sysc_revision_quirk *q; |
| int i; |
| |
| for (i = 0; i < ARRAY_SIZE(sysc_revision_quirks); i++) { |
| q = &sysc_revision_quirks[i]; |
| |
| if (q->base && q->base != ddata->module_pa) |
| continue; |
| |
| if (q->rev_offset >= 0 && |
| q->rev_offset != ddata->offsets[SYSC_REVISION]) |
| continue; |
| |
| if (q->sysc_offset >= 0 && |
| q->sysc_offset != ddata->offsets[SYSC_SYSCONFIG]) |
| continue; |
| |
| if (q->syss_offset >= 0 && |
| q->syss_offset != ddata->offsets[SYSC_SYSSTATUS]) |
| continue; |
| |
| if (q->revision == ddata->revision || |
| (q->revision & q->revision_mask) == |
| (ddata->revision & q->revision_mask)) { |
| ddata->name = q->name; |
| ddata->cfg.quirks |= q->quirks; |
| } |
| } |
| } |
| |
| /* 1-wire needs module's internal clocks enabled for reset */ |
| static void sysc_clk_enable_quirk_hdq1w(struct sysc *ddata) |
| { |
| int offset = 0x0c; /* HDQ_CTRL_STATUS */ |
| u16 val; |
| |
| val = sysc_read(ddata, offset); |
| val |= BIT(5); |
| sysc_write(ddata, offset, val); |
| } |
| |
| /* I2C needs extra enable bit toggling for reset */ |
| static void sysc_clk_quirk_i2c(struct sysc *ddata, bool enable) |
| { |
| int offset; |
| u16 val; |
| |
| /* I2C_CON, omap2/3 is different from omap4 and later */ |
| if ((ddata->revision & 0xffffff00) == 0x001f0000) |
| offset = 0x24; |
| else |
| offset = 0xa4; |
| |
| /* I2C_EN */ |
| val = sysc_read(ddata, offset); |
| if (enable) |
| val |= BIT(15); |
| else |
| val &= ~BIT(15); |
| sysc_write(ddata, offset, val); |
| } |
| |
| static void sysc_clk_enable_quirk_i2c(struct sysc *ddata) |
| { |
| sysc_clk_quirk_i2c(ddata, true); |
| } |
| |
| static void sysc_clk_disable_quirk_i2c(struct sysc *ddata) |
| { |
| sysc_clk_quirk_i2c(ddata, false); |
| } |
| |
| /* Watchdog timer needs a disable sequence after reset */ |
| static void sysc_reset_done_quirk_wdt(struct sysc *ddata) |
| { |
| int wps, spr, error; |
| u32 val; |
| |
| wps = 0x34; |
| spr = 0x48; |
| |
| sysc_write(ddata, spr, 0xaaaa); |
| error = readl_poll_timeout(ddata->module_va + wps, val, |
| !(val & 0x10), 100, |
| MAX_MODULE_SOFTRESET_WAIT); |
| if (error) |
| dev_warn(ddata->dev, "wdt disable spr failed\n"); |
| |
| sysc_write(ddata, wps, 0x5555); |
| error = readl_poll_timeout(ddata->module_va + wps, val, |
| !(val & 0x10), 100, |
| MAX_MODULE_SOFTRESET_WAIT); |
| if (error) |
| dev_warn(ddata->dev, "wdt disable wps failed\n"); |
| } |
| |
| static void sysc_init_module_quirks(struct sysc *ddata) |
| { |
| if (ddata->legacy_mode || !ddata->name) |
| return; |
| |
| if (ddata->cfg.quirks & SYSC_MODULE_QUIRK_HDQ1W) { |
| ddata->clk_enable_quirk = sysc_clk_enable_quirk_hdq1w; |
| |
| return; |
| } |
| |
| if (ddata->cfg.quirks & SYSC_MODULE_QUIRK_I2C) { |
| ddata->clk_enable_quirk = sysc_clk_enable_quirk_i2c; |
| ddata->clk_disable_quirk = sysc_clk_disable_quirk_i2c; |
| |
| return; |
| } |
| |
| if (ddata->cfg.quirks & SYSC_MODULE_QUIRK_WDT) |
| ddata->reset_done_quirk = sysc_reset_done_quirk_wdt; |
| } |
| |
| static int sysc_clockdomain_init(struct sysc *ddata) |
| { |
| struct ti_sysc_platform_data *pdata = dev_get_platdata(ddata->dev); |
| struct clk *fck = NULL, *ick = NULL; |
| int error; |
| |
| if (!pdata || !pdata->init_clockdomain) |
| return 0; |
| |
| switch (ddata->nr_clocks) { |
| case 2: |
| ick = ddata->clocks[SYSC_ICK]; |
| /* fallthrough */ |
| case 1: |
| fck = ddata->clocks[SYSC_FCK]; |
| break; |
| case 0: |
| return 0; |
| } |
| |
| error = pdata->init_clockdomain(ddata->dev, fck, ick, &ddata->cookie); |
| if (!error || error == -ENODEV) |
| return 0; |
| |
| return error; |
| } |
| |
| /* |
| * Note that pdata->init_module() typically does a reset first. After |
| * pdata->init_module() is done, PM runtime can be used for the interconnect |
| * target module. |
| */ |
| static int sysc_legacy_init(struct sysc *ddata) |
| { |
| struct ti_sysc_platform_data *pdata = dev_get_platdata(ddata->dev); |
| int error; |
| |
| if (!pdata || !pdata->init_module) |
| return 0; |
| |
| error = pdata->init_module(ddata->dev, ddata->mdata, &ddata->cookie); |
| if (error == -EEXIST) |
| error = 0; |
| |
| return error; |
| } |
| |
| /** |
| * sysc_rstctrl_reset_deassert - deassert rstctrl reset |
| * @ddata: device driver data |
| * @reset: reset before deassert |
| * |
| * A module can have both OCP softreset control and external rstctrl. |
| * If more complicated rstctrl resets are needed, please handle these |
| * directly from the child device driver and map only the module reset |
| * for the parent interconnect target module device. |
| * |
| * Automatic reset of the module on init can be skipped with the |
| * "ti,no-reset-on-init" device tree property. |
| */ |
| static int sysc_rstctrl_reset_deassert(struct sysc *ddata, bool reset) |
| { |
| int error, val; |
| |
| if (!ddata->rsts) |
| return 0; |
| |
| if (reset) { |
| error = reset_control_assert(ddata->rsts); |
| if (error) |
| return error; |
| } |
| |
| error = reset_control_deassert(ddata->rsts); |
| if (error == -EEXIST) |
| return 0; |
| |
| error = readx_poll_timeout(reset_control_status, ddata->rsts, val, |
| val == 0, 100, MAX_MODULE_SOFTRESET_WAIT); |
| |
| return error; |
| } |
| |
| /* |
| * Note that the caller must ensure the interconnect target module is enabled |
| * before calling reset. Otherwise reset will not complete. |
| */ |
| static int sysc_reset(struct sysc *ddata) |
| { |
| int sysc_offset, syss_offset, sysc_val, rstval, quirks, error = 0; |
| u32 sysc_mask, syss_done; |
| |
| sysc_offset = ddata->offsets[SYSC_SYSCONFIG]; |
| syss_offset = ddata->offsets[SYSC_SYSSTATUS]; |
| quirks = ddata->cfg.quirks; |
| |
| if (ddata->legacy_mode || sysc_offset < 0 || |
| ddata->cap->regbits->srst_shift < 0 || |
| ddata->cfg.quirks & SYSC_QUIRK_NO_RESET_ON_INIT) |
| return 0; |
| |
| sysc_mask = BIT(ddata->cap->regbits->srst_shift); |
| |
| if (ddata->cfg.quirks & SYSS_QUIRK_RESETDONE_INVERTED) |
| syss_done = 0; |
| else |
| syss_done = ddata->cfg.syss_mask; |
| |
| if (ddata->clk_disable_quirk) |
| ddata->clk_disable_quirk(ddata); |
| |
| sysc_val = sysc_read_sysconfig(ddata); |
| sysc_val |= sysc_mask; |
| sysc_write(ddata, sysc_offset, sysc_val); |
| |
| if (ddata->clk_enable_quirk) |
| ddata->clk_enable_quirk(ddata); |
| |
| /* Poll on reset status */ |
| if (syss_offset >= 0) { |
| error = readx_poll_timeout(sysc_read_sysstatus, ddata, rstval, |
| (rstval & ddata->cfg.syss_mask) == |
| syss_done, |
| 100, MAX_MODULE_SOFTRESET_WAIT); |
| |
| } else if (ddata->cfg.quirks & SYSC_QUIRK_RESET_STATUS) { |
| error = readx_poll_timeout(sysc_read_sysconfig, ddata, rstval, |
| !(rstval & sysc_mask), |
| 100, MAX_MODULE_SOFTRESET_WAIT); |
| } |
| |
| if (ddata->reset_done_quirk) |
| ddata->reset_done_quirk(ddata); |
| |
| return error; |
| } |
| |
| /* |
| * At this point the module is configured enough to read the revision but |
| * module may not be completely configured yet to use PM runtime. Enable |
| * all clocks directly during init to configure the quirks needed for PM |
| * runtime based on the revision register. |
| */ |
| static int sysc_init_module(struct sysc *ddata) |
| { |
| int error = 0; |
| bool manage_clocks = true; |
| |
| error = sysc_rstctrl_reset_deassert(ddata, false); |
| if (error) |
| return error; |
| |
| if (ddata->cfg.quirks & |
| (SYSC_QUIRK_NO_IDLE | SYSC_QUIRK_NO_IDLE_ON_INIT)) |
| manage_clocks = false; |
| |
| error = sysc_clockdomain_init(ddata); |
| if (error) |
| return error; |
| |
| if (manage_clocks) { |
| sysc_clkdm_deny_idle(ddata); |
| |
| error = sysc_enable_opt_clocks(ddata); |
| if (error) |
| return error; |
| |
| error = sysc_enable_main_clocks(ddata); |
| if (error) |
| goto err_opt_clocks; |
| } |
| |
| if (!(ddata->cfg.quirks & SYSC_QUIRK_NO_RESET_ON_INIT)) { |
| error = sysc_rstctrl_reset_deassert(ddata, true); |
| if (error) |
| goto err_main_clocks; |
| } |
| |
| ddata->revision = sysc_read_revision(ddata); |
| sysc_init_revision_quirks(ddata); |
| sysc_init_module_quirks(ddata); |
| |
| if (ddata->legacy_mode) { |
| error = sysc_legacy_init(ddata); |
| if (error) |
| goto err_main_clocks; |
| } |
| |
| if (!ddata->legacy_mode && manage_clocks) { |
| error = sysc_enable_module(ddata->dev); |
| if (error) |
| goto err_main_clocks; |
| } |
| |
| error = sysc_reset(ddata); |
| if (error) |
| dev_err(ddata->dev, "Reset failed with %d\n", error); |
| |
| if (!ddata->legacy_mode && manage_clocks) |
| sysc_disable_module(ddata->dev); |
| |
| err_main_clocks: |
| if (manage_clocks) |
| sysc_disable_main_clocks(ddata); |
| err_opt_clocks: |
| if (manage_clocks) { |
| sysc_disable_opt_clocks(ddata); |
| sysc_clkdm_allow_idle(ddata); |
| } |
| |
| return error; |
| } |
| |
| 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; |
| |
| ddata->cfg.sysc_val = 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; |
| } |
| |
| /* |
| * Many child device drivers need to have fck and opt clocks available |
| * to get the clock rate for device internal configuration etc. |
| */ |
| static int sysc_child_add_named_clock(struct sysc *ddata, |
| struct device *child, |
| const char *name) |
| { |
| struct clk *clk; |
| struct clk_lookup *l; |
| int error = 0; |
| |
| if (!name) |
| return 0; |
| |
| clk = clk_get(child, name); |
| if (!IS_ERR(clk)) { |
| clk_put(clk); |
| |
| return -EEXIST; |
| } |
| |
| clk = clk_get(ddata->dev, name); |
| if (IS_ERR(clk)) |
| return -ENODEV; |
| |
| l = clkdev_create(clk, name, dev_name(child)); |
| if (!l) |
| error = -ENOMEM; |
| |
| clk_put(clk); |
| |
| return error; |
| } |
| |
| static int sysc_child_add_clocks(struct sysc *ddata, |
| struct device *child) |
| { |
| int i, error; |
| |
| for (i = 0; i < ddata->nr_clocks; i++) { |
| error = sysc_child_add_named_clock(ddata, |
| child, |
| ddata->clock_roles[i]); |
| if (error && error != -EEXIST) { |
| dev_err(ddata->dev, "could not add child clock %s: %i\n", |
| ddata->clock_roles[i], error); |
| |
| return error; |
| } |
| } |
| |
| return 0; |
| } |
| |
| static struct device_type sysc_device_type = { |
| }; |
| |
| static struct sysc *sysc_child_to_parent(struct device *dev) |
| { |
| struct device *parent = dev->parent; |
| |
| if (!parent || parent->type != &sysc_device_type) |
| return NULL; |
| |
| return dev_get_drvdata(parent); |
| } |
| |
| static int __maybe_unused sysc_child_runtime_suspend(struct device *dev) |
| { |
| struct sysc *ddata; |
| int error; |
| |
| ddata = sysc_child_to_parent(dev); |
| |
| error = pm_generic_runtime_suspend(dev); |
| if (error) |
| return error; |
| |
| if (!ddata->enabled) |
| return 0; |
| |
| return sysc_runtime_suspend(ddata->dev); |
| } |
| |
| static int __maybe_unused sysc_child_runtime_resume(struct device *dev) |
| { |
| struct sysc *ddata; |
| int error; |
| |
| ddata = sysc_child_to_parent(dev); |
| |
| if (!ddata->enabled) { |
| error = sysc_runtime_resume(ddata->dev); |
| if (error < 0) |
| dev_err(ddata->dev, |
| "%s error: %i\n", __func__, error); |
| } |
| |
| return pm_generic_runtime_resume(dev); |
| } |
| |
| #ifdef CONFIG_PM_SLEEP |
| static int sysc_child_suspend_noirq(struct device *dev) |
| { |
| struct sysc *ddata; |
| int error; |
| |
| ddata = sysc_child_to_parent(dev); |
| |
| dev_dbg(ddata->dev, "%s %s\n", __func__, |
| ddata->name ? ddata->name : ""); |
| |
| error = pm_generic_suspend_noirq(dev); |
| if (error) { |
| dev_err(dev, "%s error at %i: %i\n", |
| __func__, __LINE__, error); |
| |
| return error; |
| } |
| |
| if (!pm_runtime_status_suspended(dev)) { |
| error = pm_generic_runtime_suspend(dev); |
| if (error) { |
| dev_dbg(dev, "%s busy at %i: %i\n", |
| __func__, __LINE__, error); |
| |
| return 0; |
| } |
| |
| error = sysc_runtime_suspend(ddata->dev); |
| if (error) { |
| dev_err(dev, "%s error at %i: %i\n", |
| __func__, __LINE__, error); |
| |
| return error; |
| } |
| |
| ddata->child_needs_resume = true; |
| } |
| |
| return 0; |
| } |
| |
| static int sysc_child_resume_noirq(struct device *dev) |
| { |
| struct sysc *ddata; |
| int error; |
| |
| ddata = sysc_child_to_parent(dev); |
| |
| dev_dbg(ddata->dev, "%s %s\n", __func__, |
| ddata->name ? ddata->name : ""); |
| |
| if (ddata->child_needs_resume) { |
| ddata->child_needs_resume = false; |
| |
| error = sysc_runtime_resume(ddata->dev); |
| if (error) |
| dev_err(ddata->dev, |
| "%s runtime resume error: %i\n", |
| __func__, error); |
| |
| error = pm_generic_runtime_resume(dev); |
| if (error) |
| dev_err(ddata->dev, |
| "%s generic runtime resume: %i\n", |
| __func__, error); |
| } |
| |
| return pm_generic_resume_noirq(dev); |
| } |
| #endif |
| |
| static struct dev_pm_domain sysc_child_pm_domain = { |
| .ops = { |
| SET_RUNTIME_PM_OPS(sysc_child_runtime_suspend, |
| sysc_child_runtime_resume, |
| NULL) |
| USE_PLATFORM_PM_SLEEP_OPS |
| SET_NOIRQ_SYSTEM_SLEEP_PM_OPS(sysc_child_suspend_noirq, |
| sysc_child_resume_noirq) |
| } |
| }; |
| |
| /** |
| * sysc_legacy_idle_quirk - handle children in omap_device compatible way |
| * @ddata: device driver data |
| * @child: child device driver |
| * |
| * Allow idle for child devices as done with _od_runtime_suspend(). |
| * Otherwise many child devices will not idle because of the permanent |
| * parent usecount set in pm_runtime_irq_safe(). |
| * |
| * Note that the long term solution is to just modify the child device |
| * drivers to not set pm_runtime_irq_safe() and then this can be just |
| * dropped. |
| */ |
| static void sysc_legacy_idle_quirk(struct sysc *ddata, struct device *child) |
| { |
| if (ddata->cfg.quirks & SYSC_QUIRK_LEGACY_IDLE) |
| dev_pm_domain_set(child, &sysc_child_pm_domain); |
| } |
| |
| static int sysc_notifier_call(struct notifier_block *nb, |
| unsigned long event, void *device) |
| { |
| struct device *dev = device; |
| struct sysc *ddata; |
| int error; |
| |
| ddata = sysc_child_to_parent(dev); |
| if (!ddata) |
| return NOTIFY_DONE; |
| |
| switch (event) { |
| case BUS_NOTIFY_ADD_DEVICE: |
| error = sysc_child_add_clocks(ddata, dev); |
| if (error) |
| return error; |
| sysc_legacy_idle_quirk(ddata, dev); |
| break; |
| default: |
| break; |
| } |
| |
| return NOTIFY_DONE; |
| } |
| |
| static struct notifier_block sysc_nb = { |
| .notifier_call = sysc_notifier_call, |
| }; |
| |
| /* 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, }, |
| { .name = "ti,no-idle", |
| .mask = SYSC_QUIRK_NO_IDLE, }, |
| }; |
| |
| static void sysc_parse_dts_quirks(struct sysc *ddata, struct device_node *np, |
| bool is_child) |
| { |
| const struct property *prop; |
| int i, len; |
| |
| for (i = 0; i < ARRAY_SIZE(sysc_dts_quirks); i++) { |
| const char *name = sysc_dts_quirks[i].name; |
| |
| prop = of_get_property(np, name, &len); |
| if (!prop) |
| continue; |
| |
| ddata->cfg.quirks |= sysc_dts_quirks[i].mask; |
| if (is_child) { |
| dev_warn(ddata->dev, |
| "dts flag should be at module level for %s\n", |
| name); |
| } |
| } |
| } |
| |
| static int sysc_init_dts_quirks(struct sysc *ddata) |
| { |
| struct device_node *np = ddata->dev->of_node; |
| int error; |
| u32 val; |
| |
| ddata->legacy_mode = of_get_property(np, "ti,hwmods", NULL); |
| |
| sysc_parse_dts_quirks(ddata, np, false); |
| 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; |
| |
| if (!ddata->clocks) |
| return; |
| |
| for (i = 0; i < SYSC_MAX_CLOCKS; i++) { |
| if (!IS_ERR_OR_NULL(ddata->clocks[i])) |
| clk_unprepare(ddata->clocks[i]); |
| } |
| } |
| |
| /* |
| * 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 | |
| SYSC_QUIRK_LEGACY_IDLE, |
| }; |
| |
| /* |
| * 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_OMAP3_SR_ENAWAKEUP, |
| .regbits = &sysc_regbits_omap36xx_sr, |
| .mod_quirks = SYSC_QUIRK_UNCACHED | SYSC_QUIRK_LEGACY_IDLE, |
| }; |
| |
| static const struct sysc_capabilities sysc_omap4_sr = { |
| .type = TI_SYSC_OMAP4_SR, |
| .regbits = &sysc_regbits_omap36xx_sr, |
| .mod_quirks = SYSC_QUIRK_LEGACY_IDLE, |
| }; |
| |
| /* |
| * 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, |
| .mod_quirks = SYSC_QUIRK_OPT_CLKS_NEEDED, |
| }; |
| |
| /* |
| * McASP found on dra7 and later |
| */ |
| static const struct sysc_capabilities sysc_dra7_mcasp = { |
| .type = TI_SYSC_OMAP4_SIMPLE, |
| .regbits = &sysc_regbits_omap4_simple, |
| .mod_quirks = SYSC_QUIRK_OPT_CLKS_NEEDED, |
| }; |
| |
| /* |
| * 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 const struct sysc_regbits sysc_regbits_dra7_mcan = { |
| .dmadisable_shift = -ENODEV, |
| .midle_shift = -ENODEV, |
| .sidle_shift = -ENODEV, |
| .clkact_shift = -ENODEV, |
| .enwkup_shift = 4, |
| .srst_shift = 0, |
| .emufree_shift = -ENODEV, |
| .autoidle_shift = -ENODEV, |
| }; |
| |
| static const struct sysc_capabilities sysc_dra7_mcan = { |
| .type = TI_SYSC_DRA7_MCAN, |
| .sysc_mask = SYSC_DRA7_MCAN_ENAWAKEUP | SYSC_OMAP4_SOFTRESET, |
| .regbits = &sysc_regbits_dra7_mcan, |
| .mod_quirks = SYSS_QUIRK_RESETDONE_INVERTED, |
| }; |
| |
| static int sysc_init_pdata(struct sysc *ddata) |
| { |
| struct ti_sysc_platform_data *pdata = dev_get_platdata(ddata->dev); |
| struct ti_sysc_module_data *mdata; |
| |
| if (!pdata) |
| return 0; |
| |
| mdata = devm_kzalloc(ddata->dev, sizeof(*mdata), GFP_KERNEL); |
| if (!mdata) |
| return -ENOMEM; |
| |
| if (ddata->legacy_mode) { |
| mdata->name = ddata->legacy_mode; |
| mdata->module_pa = ddata->module_pa; |
| mdata->module_size = ddata->module_size; |
| mdata->offsets = ddata->offsets; |
| mdata->nr_offsets = SYSC_MAX_REGS; |
| mdata->cap = ddata->cap; |
| mdata->cfg = &ddata->cfg; |
| } |
| |
| ddata->mdata = mdata; |
| |
| return 0; |
| } |
| |
| 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 void ti_sysc_idle(struct work_struct *work) |
| { |
| struct sysc *ddata; |
| |
| ddata = container_of(work, struct sysc, idle_work.work); |
| |
| if (pm_runtime_active(ddata->dev)) |
| pm_runtime_put_sync(ddata->dev); |
| } |
| |
| static const struct of_device_id sysc_match_table[] = { |
| { .compatible = "simple-bus", }, |
| { /* sentinel */ }, |
| }; |
| |
| static int sysc_probe(struct platform_device *pdev) |
| { |
| struct ti_sysc_platform_data *pdata = dev_get_platdata(&pdev->dev); |
| struct sysc *ddata; |
| int error; |
| |
| ddata = devm_kzalloc(&pdev->dev, sizeof(*ddata), GFP_KERNEL); |
| if (!ddata) |
| return -ENOMEM; |
| |
| ddata->dev = &pdev->dev; |
| platform_set_drvdata(pdev, ddata); |
| |
| error = sysc_init_match(ddata); |
| if (error) |
| return error; |
| |
| error = sysc_init_dts_quirks(ddata); |
| if (error) |
| return error; |
| |
| error = sysc_map_and_check_registers(ddata); |
| if (error) |
| return error; |
| |
| error = sysc_init_sysc_mask(ddata); |
| if (error) |
| return error; |
| |
| error = sysc_init_idlemodes(ddata); |
| if (error) |
| return error; |
| |
| error = sysc_init_syss_mask(ddata); |
| if (error) |
| return error; |
| |
| error = sysc_init_pdata(ddata); |
| if (error) |
| return error; |
| |
| sysc_init_early_quirks(ddata); |
| |
| error = sysc_get_clocks(ddata); |
| if (error) |
| return error; |
| |
| error = sysc_init_resets(ddata); |
| if (error) |
| goto unprepare; |
| |
| error = sysc_init_module(ddata); |
| if (error) |
| goto unprepare; |
| |
| pm_runtime_enable(ddata->dev); |
| error = pm_runtime_get_sync(ddata->dev); |
| if (error < 0) { |
| pm_runtime_put_noidle(ddata->dev); |
| pm_runtime_disable(ddata->dev); |
| goto unprepare; |
| } |
| |
| sysc_show_registers(ddata); |
| |
| ddata->dev->type = &sysc_device_type; |
| error = of_platform_populate(ddata->dev->of_node, sysc_match_table, |
| pdata ? pdata->auxdata : NULL, |
| ddata->dev); |
| if (error) |
| goto err; |
| |
| INIT_DELAYED_WORK(&ddata->idle_work, ti_sysc_idle); |
| |
| /* At least earlycon won't survive without deferred idle */ |
| if (ddata->cfg.quirks & (SYSC_QUIRK_NO_IDLE_ON_INIT | |
| SYSC_QUIRK_NO_RESET_ON_INIT)) { |
| schedule_delayed_work(&ddata->idle_work, 3000); |
| } else { |
| pm_runtime_put(&pdev->dev); |
| } |
| |
| if (!of_get_available_child_count(ddata->dev->of_node)) |
| ddata->disable_on_idle = true; |
| |
| return 0; |
| |
| err: |
| pm_runtime_put_sync(&pdev->dev); |
| pm_runtime_disable(&pdev->dev); |
| unprepare: |
| sysc_unprepare(ddata); |
| |
| return error; |
| } |
| |
| static int sysc_remove(struct platform_device *pdev) |
| { |
| struct sysc *ddata = platform_get_drvdata(pdev); |
| int error; |
| |
| cancel_delayed_work_sync(&ddata->idle_work); |
| |
| error = pm_runtime_get_sync(ddata->dev); |
| if (error < 0) { |
| pm_runtime_put_noidle(ddata->dev); |
| pm_runtime_disable(ddata->dev); |
| goto unprepare; |
| } |
| |
| of_platform_depopulate(&pdev->dev); |
| |
| pm_runtime_put_sync(&pdev->dev); |
| pm_runtime_disable(&pdev->dev); |
| reset_control_assert(ddata->rsts); |
| |
| unprepare: |
| sysc_unprepare(ddata); |
| |
| return 0; |
| } |
| |
| static const struct of_device_id sysc_match[] = { |
| { .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-dra7-mcasp", .data = &sysc_dra7_mcasp, }, |
| { .compatible = "ti,sysc-usb-host-fs", |
| .data = &sysc_omap4_usb_host_fs, }, |
| { .compatible = "ti,sysc-dra7-mcan", .data = &sysc_dra7_mcan, }, |
| { }, |
| }; |
| MODULE_DEVICE_TABLE(of, sysc_match); |
| |
| static struct platform_driver sysc_driver = { |
| .probe = sysc_probe, |
| .remove = sysc_remove, |
| .driver = { |
| .name = "ti-sysc", |
| .of_match_table = sysc_match, |
| .pm = &sysc_pm_ops, |
| }, |
| }; |
| |
| static int __init sysc_init(void) |
| { |
| bus_register_notifier(&platform_bus_type, &sysc_nb); |
| |
| return platform_driver_register(&sysc_driver); |
| } |
| module_init(sysc_init); |
| |
| static void __exit sysc_exit(void) |
| { |
| bus_unregister_notifier(&platform_bus_type, &sysc_nb); |
| platform_driver_unregister(&sysc_driver); |
| } |
| module_exit(sysc_exit); |
| |
| MODULE_DESCRIPTION("TI sysc interconnect target driver"); |
| MODULE_LICENSE("GPL v2"); |