| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| Tony Lindgren | 10348 | 92.29% | 67 | 91.78% |
| Roger Quadros | 601 | 5.36% | 1 | 1.37% |
| Faiz Abbas | 233 | 2.08% | 2 | 2.74% |
| Suman Anna | 21 | 0.19% | 1 | 1.37% |
| Kees Cook | 8 | 0.07% | 1 | 1.37% |
| Arnd Bergmann | 2 | 0.02% | 1 | 1.37% |
| Total | 11213 | 73 |
/* * 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");
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