| // SPDX-License-Identifier: GPL-2.0 |
| /* |
| * Pin Control and GPIO driver for SuperH Pin Function Controller. |
| * |
| * Authors: Magnus Damm, Paul Mundt, Laurent Pinchart |
| * |
| * Copyright (C) 2008 Magnus Damm |
| * Copyright (C) 2009 - 2012 Paul Mundt |
| */ |
| |
| #define DRV_NAME "sh-pfc" |
| |
| #include <linux/bitops.h> |
| #include <linux/err.h> |
| #include <linux/errno.h> |
| #include <linux/io.h> |
| #include <linux/ioport.h> |
| #include <linux/kernel.h> |
| #include <linux/init.h> |
| #include <linux/of.h> |
| #include <linux/of_device.h> |
| #include <linux/pinctrl/machine.h> |
| #include <linux/platform_device.h> |
| #include <linux/psci.h> |
| #include <linux/slab.h> |
| #include <linux/sys_soc.h> |
| |
| #include "core.h" |
| |
| static int sh_pfc_map_resources(struct sh_pfc *pfc, |
| struct platform_device *pdev) |
| { |
| struct sh_pfc_window *windows; |
| unsigned int *irqs = NULL; |
| unsigned int num_windows; |
| struct resource *res; |
| unsigned int i; |
| int num_irqs; |
| |
| /* Count the MEM and IRQ resources. */ |
| for (num_windows = 0;; num_windows++) { |
| res = platform_get_resource(pdev, IORESOURCE_MEM, num_windows); |
| if (!res) |
| break; |
| } |
| if (num_windows == 0) |
| return -EINVAL; |
| |
| num_irqs = platform_irq_count(pdev); |
| if (num_irqs < 0) |
| return num_irqs; |
| |
| /* Allocate memory windows and IRQs arrays. */ |
| windows = devm_kcalloc(pfc->dev, num_windows, sizeof(*windows), |
| GFP_KERNEL); |
| if (windows == NULL) |
| return -ENOMEM; |
| |
| pfc->num_windows = num_windows; |
| pfc->windows = windows; |
| |
| if (num_irqs) { |
| irqs = devm_kcalloc(pfc->dev, num_irqs, sizeof(*irqs), |
| GFP_KERNEL); |
| if (irqs == NULL) |
| return -ENOMEM; |
| |
| pfc->num_irqs = num_irqs; |
| pfc->irqs = irqs; |
| } |
| |
| /* Fill them. */ |
| for (i = 0; i < num_windows; i++) { |
| res = platform_get_resource(pdev, IORESOURCE_MEM, i); |
| windows->phys = res->start; |
| windows->size = resource_size(res); |
| windows->virt = devm_ioremap_resource(pfc->dev, res); |
| if (IS_ERR(windows->virt)) |
| return -ENOMEM; |
| windows++; |
| } |
| for (i = 0; i < num_irqs; i++) |
| *irqs++ = platform_get_irq(pdev, i); |
| |
| return 0; |
| } |
| |
| static void __iomem *sh_pfc_phys_to_virt(struct sh_pfc *pfc, u32 reg) |
| { |
| struct sh_pfc_window *window; |
| phys_addr_t address = reg; |
| unsigned int i; |
| |
| /* scan through physical windows and convert address */ |
| for (i = 0; i < pfc->num_windows; i++) { |
| window = pfc->windows + i; |
| |
| if (address < window->phys) |
| continue; |
| |
| if (address >= (window->phys + window->size)) |
| continue; |
| |
| return window->virt + (address - window->phys); |
| } |
| |
| BUG(); |
| return NULL; |
| } |
| |
| int sh_pfc_get_pin_index(struct sh_pfc *pfc, unsigned int pin) |
| { |
| unsigned int offset; |
| unsigned int i; |
| |
| for (i = 0, offset = 0; i < pfc->nr_ranges; ++i) { |
| const struct sh_pfc_pin_range *range = &pfc->ranges[i]; |
| |
| if (pin <= range->end) |
| return pin >= range->start |
| ? offset + pin - range->start : -1; |
| |
| offset += range->end - range->start + 1; |
| } |
| |
| return -EINVAL; |
| } |
| |
| static int sh_pfc_enum_in_range(u16 enum_id, const struct pinmux_range *r) |
| { |
| if (enum_id < r->begin) |
| return 0; |
| |
| if (enum_id > r->end) |
| return 0; |
| |
| return 1; |
| } |
| |
| u32 sh_pfc_read_raw_reg(void __iomem *mapped_reg, unsigned int reg_width) |
| { |
| switch (reg_width) { |
| case 8: |
| return ioread8(mapped_reg); |
| case 16: |
| return ioread16(mapped_reg); |
| case 32: |
| return ioread32(mapped_reg); |
| } |
| |
| BUG(); |
| return 0; |
| } |
| |
| void sh_pfc_write_raw_reg(void __iomem *mapped_reg, unsigned int reg_width, |
| u32 data) |
| { |
| switch (reg_width) { |
| case 8: |
| iowrite8(data, mapped_reg); |
| return; |
| case 16: |
| iowrite16(data, mapped_reg); |
| return; |
| case 32: |
| iowrite32(data, mapped_reg); |
| return; |
| } |
| |
| BUG(); |
| } |
| |
| u32 sh_pfc_read(struct sh_pfc *pfc, u32 reg) |
| { |
| return sh_pfc_read_raw_reg(sh_pfc_phys_to_virt(pfc, reg), 32); |
| } |
| |
| static void sh_pfc_unlock_reg(struct sh_pfc *pfc, u32 reg, u32 data) |
| { |
| u32 unlock; |
| |
| if (!pfc->info->unlock_reg) |
| return; |
| |
| if (pfc->info->unlock_reg >= 0x80000000UL) |
| unlock = pfc->info->unlock_reg; |
| else |
| /* unlock_reg is a mask */ |
| unlock = reg & ~pfc->info->unlock_reg; |
| |
| sh_pfc_write_raw_reg(sh_pfc_phys_to_virt(pfc, unlock), 32, ~data); |
| } |
| |
| void sh_pfc_write(struct sh_pfc *pfc, u32 reg, u32 data) |
| { |
| sh_pfc_unlock_reg(pfc, reg, data); |
| sh_pfc_write_raw_reg(sh_pfc_phys_to_virt(pfc, reg), 32, data); |
| } |
| |
| static void sh_pfc_config_reg_helper(struct sh_pfc *pfc, |
| const struct pinmux_cfg_reg *crp, |
| unsigned int in_pos, |
| void __iomem **mapped_regp, u32 *maskp, |
| unsigned int *posp) |
| { |
| unsigned int k; |
| |
| *mapped_regp = sh_pfc_phys_to_virt(pfc, crp->reg); |
| |
| if (crp->field_width) { |
| *maskp = (1 << crp->field_width) - 1; |
| *posp = crp->reg_width - ((in_pos + 1) * crp->field_width); |
| } else { |
| *maskp = (1 << crp->var_field_width[in_pos]) - 1; |
| *posp = crp->reg_width; |
| for (k = 0; k <= in_pos; k++) |
| *posp -= crp->var_field_width[k]; |
| } |
| } |
| |
| static void sh_pfc_write_config_reg(struct sh_pfc *pfc, |
| const struct pinmux_cfg_reg *crp, |
| unsigned int field, u32 value) |
| { |
| void __iomem *mapped_reg; |
| unsigned int pos; |
| u32 mask, data; |
| |
| sh_pfc_config_reg_helper(pfc, crp, field, &mapped_reg, &mask, &pos); |
| |
| dev_dbg(pfc->dev, "write_reg addr = %x, value = 0x%x, field = %u, " |
| "r_width = %u, f_width = %u\n", |
| crp->reg, value, field, crp->reg_width, hweight32(mask)); |
| |
| mask = ~(mask << pos); |
| value = value << pos; |
| |
| data = sh_pfc_read_raw_reg(mapped_reg, crp->reg_width); |
| data &= mask; |
| data |= value; |
| |
| sh_pfc_unlock_reg(pfc, crp->reg, data); |
| sh_pfc_write_raw_reg(mapped_reg, crp->reg_width, data); |
| } |
| |
| static int sh_pfc_get_config_reg(struct sh_pfc *pfc, u16 enum_id, |
| const struct pinmux_cfg_reg **crp, |
| unsigned int *fieldp, u32 *valuep) |
| { |
| unsigned int k = 0; |
| |
| while (1) { |
| const struct pinmux_cfg_reg *config_reg = |
| pfc->info->cfg_regs + k; |
| unsigned int r_width = config_reg->reg_width; |
| unsigned int f_width = config_reg->field_width; |
| unsigned int curr_width; |
| unsigned int bit_pos; |
| unsigned int pos = 0; |
| unsigned int m = 0; |
| |
| if (!r_width) |
| break; |
| |
| for (bit_pos = 0; bit_pos < r_width; bit_pos += curr_width) { |
| u32 ncomb; |
| u32 n; |
| |
| if (f_width) |
| curr_width = f_width; |
| else |
| curr_width = config_reg->var_field_width[m]; |
| |
| ncomb = 1 << curr_width; |
| for (n = 0; n < ncomb; n++) { |
| if (config_reg->enum_ids[pos + n] == enum_id) { |
| *crp = config_reg; |
| *fieldp = m; |
| *valuep = n; |
| return 0; |
| } |
| } |
| pos += ncomb; |
| m++; |
| } |
| k++; |
| } |
| |
| return -EINVAL; |
| } |
| |
| static int sh_pfc_mark_to_enum(struct sh_pfc *pfc, u16 mark, int pos, |
| u16 *enum_idp) |
| { |
| const u16 *data = pfc->info->pinmux_data; |
| unsigned int k; |
| |
| if (pos) { |
| *enum_idp = data[pos + 1]; |
| return pos + 1; |
| } |
| |
| for (k = 0; k < pfc->info->pinmux_data_size; k++) { |
| if (data[k] == mark) { |
| *enum_idp = data[k + 1]; |
| return k + 1; |
| } |
| } |
| |
| dev_err(pfc->dev, "cannot locate data/mark enum_id for mark %d\n", |
| mark); |
| return -EINVAL; |
| } |
| |
| int sh_pfc_config_mux(struct sh_pfc *pfc, unsigned mark, int pinmux_type) |
| { |
| const struct pinmux_range *range; |
| int pos = 0; |
| |
| switch (pinmux_type) { |
| case PINMUX_TYPE_GPIO: |
| case PINMUX_TYPE_FUNCTION: |
| range = NULL; |
| break; |
| |
| #ifdef CONFIG_PINCTRL_SH_PFC_GPIO |
| case PINMUX_TYPE_OUTPUT: |
| range = &pfc->info->output; |
| break; |
| |
| case PINMUX_TYPE_INPUT: |
| range = &pfc->info->input; |
| break; |
| #endif /* CONFIG_PINCTRL_SH_PFC_GPIO */ |
| |
| default: |
| return -EINVAL; |
| } |
| |
| /* Iterate over all the configuration fields we need to update. */ |
| while (1) { |
| const struct pinmux_cfg_reg *cr; |
| unsigned int field; |
| u16 enum_id; |
| u32 value; |
| int in_range; |
| int ret; |
| |
| pos = sh_pfc_mark_to_enum(pfc, mark, pos, &enum_id); |
| if (pos < 0) |
| return pos; |
| |
| if (!enum_id) |
| break; |
| |
| /* Check if the configuration field selects a function. If it |
| * doesn't, skip the field if it's not applicable to the |
| * requested pinmux type. |
| */ |
| in_range = sh_pfc_enum_in_range(enum_id, &pfc->info->function); |
| if (!in_range) { |
| if (pinmux_type == PINMUX_TYPE_FUNCTION) { |
| /* Functions are allowed to modify all |
| * fields. |
| */ |
| in_range = 1; |
| } else if (pinmux_type != PINMUX_TYPE_GPIO) { |
| /* Input/output types can only modify fields |
| * that correspond to their respective ranges. |
| */ |
| in_range = sh_pfc_enum_in_range(enum_id, range); |
| |
| /* |
| * special case pass through for fixed |
| * input-only or output-only pins without |
| * function enum register association. |
| */ |
| if (in_range && enum_id == range->force) |
| continue; |
| } |
| /* GPIOs are only allowed to modify function fields. */ |
| } |
| |
| if (!in_range) |
| continue; |
| |
| ret = sh_pfc_get_config_reg(pfc, enum_id, &cr, &field, &value); |
| if (ret < 0) |
| return ret; |
| |
| sh_pfc_write_config_reg(pfc, cr, field, value); |
| } |
| |
| return 0; |
| } |
| |
| static int sh_pfc_init_ranges(struct sh_pfc *pfc) |
| { |
| struct sh_pfc_pin_range *range; |
| unsigned int nr_ranges; |
| unsigned int i; |
| |
| if (pfc->info->pins[0].pin == (u16)-1) { |
| /* Pin number -1 denotes that the SoC doesn't report pin numbers |
| * in its pin arrays yet. Consider the pin numbers range as |
| * continuous and allocate a single range. |
| */ |
| pfc->nr_ranges = 1; |
| pfc->ranges = devm_kzalloc(pfc->dev, sizeof(*pfc->ranges), |
| GFP_KERNEL); |
| if (pfc->ranges == NULL) |
| return -ENOMEM; |
| |
| pfc->ranges->start = 0; |
| pfc->ranges->end = pfc->info->nr_pins - 1; |
| pfc->nr_gpio_pins = pfc->info->nr_pins; |
| |
| return 0; |
| } |
| |
| /* Count, allocate and fill the ranges. The PFC SoC data pins array must |
| * be sorted by pin numbers, and pins without a GPIO port must come |
| * last. |
| */ |
| for (i = 1, nr_ranges = 1; i < pfc->info->nr_pins; ++i) { |
| if (pfc->info->pins[i-1].pin != pfc->info->pins[i].pin - 1) |
| nr_ranges++; |
| } |
| |
| pfc->nr_ranges = nr_ranges; |
| pfc->ranges = devm_kcalloc(pfc->dev, nr_ranges, sizeof(*pfc->ranges), |
| GFP_KERNEL); |
| if (pfc->ranges == NULL) |
| return -ENOMEM; |
| |
| range = pfc->ranges; |
| range->start = pfc->info->pins[0].pin; |
| |
| for (i = 1; i < pfc->info->nr_pins; ++i) { |
| if (pfc->info->pins[i-1].pin == pfc->info->pins[i].pin - 1) |
| continue; |
| |
| range->end = pfc->info->pins[i-1].pin; |
| if (!(pfc->info->pins[i-1].configs & SH_PFC_PIN_CFG_NO_GPIO)) |
| pfc->nr_gpio_pins = range->end + 1; |
| |
| range++; |
| range->start = pfc->info->pins[i].pin; |
| } |
| |
| range->end = pfc->info->pins[i-1].pin; |
| if (!(pfc->info->pins[i-1].configs & SH_PFC_PIN_CFG_NO_GPIO)) |
| pfc->nr_gpio_pins = range->end + 1; |
| |
| return 0; |
| } |
| |
| #ifdef CONFIG_OF |
| static const struct of_device_id sh_pfc_of_table[] = { |
| #ifdef CONFIG_PINCTRL_PFC_EMEV2 |
| { |
| .compatible = "renesas,pfc-emev2", |
| .data = &emev2_pinmux_info, |
| }, |
| #endif |
| #ifdef CONFIG_PINCTRL_PFC_R8A73A4 |
| { |
| .compatible = "renesas,pfc-r8a73a4", |
| .data = &r8a73a4_pinmux_info, |
| }, |
| #endif |
| #ifdef CONFIG_PINCTRL_PFC_R8A7740 |
| { |
| .compatible = "renesas,pfc-r8a7740", |
| .data = &r8a7740_pinmux_info, |
| }, |
| #endif |
| #ifdef CONFIG_PINCTRL_PFC_R8A7742 |
| { |
| .compatible = "renesas,pfc-r8a7742", |
| .data = &r8a7742_pinmux_info, |
| }, |
| #endif |
| #ifdef CONFIG_PINCTRL_PFC_R8A7743 |
| { |
| .compatible = "renesas,pfc-r8a7743", |
| .data = &r8a7743_pinmux_info, |
| }, |
| #endif |
| #ifdef CONFIG_PINCTRL_PFC_R8A7744 |
| { |
| .compatible = "renesas,pfc-r8a7744", |
| .data = &r8a7744_pinmux_info, |
| }, |
| #endif |
| #ifdef CONFIG_PINCTRL_PFC_R8A7745 |
| { |
| .compatible = "renesas,pfc-r8a7745", |
| .data = &r8a7745_pinmux_info, |
| }, |
| #endif |
| #ifdef CONFIG_PINCTRL_PFC_R8A77470 |
| { |
| .compatible = "renesas,pfc-r8a77470", |
| .data = &r8a77470_pinmux_info, |
| }, |
| #endif |
| #ifdef CONFIG_PINCTRL_PFC_R8A774A1 |
| { |
| .compatible = "renesas,pfc-r8a774a1", |
| .data = &r8a774a1_pinmux_info, |
| }, |
| #endif |
| #ifdef CONFIG_PINCTRL_PFC_R8A774B1 |
| { |
| .compatible = "renesas,pfc-r8a774b1", |
| .data = &r8a774b1_pinmux_info, |
| }, |
| #endif |
| #ifdef CONFIG_PINCTRL_PFC_R8A774C0 |
| { |
| .compatible = "renesas,pfc-r8a774c0", |
| .data = &r8a774c0_pinmux_info, |
| }, |
| #endif |
| #ifdef CONFIG_PINCTRL_PFC_R8A774E1 |
| { |
| .compatible = "renesas,pfc-r8a774e1", |
| .data = &r8a774e1_pinmux_info, |
| }, |
| #endif |
| #ifdef CONFIG_PINCTRL_PFC_R8A7778 |
| { |
| .compatible = "renesas,pfc-r8a7778", |
| .data = &r8a7778_pinmux_info, |
| }, |
| #endif |
| #ifdef CONFIG_PINCTRL_PFC_R8A7779 |
| { |
| .compatible = "renesas,pfc-r8a7779", |
| .data = &r8a7779_pinmux_info, |
| }, |
| #endif |
| #ifdef CONFIG_PINCTRL_PFC_R8A7790 |
| { |
| .compatible = "renesas,pfc-r8a7790", |
| .data = &r8a7790_pinmux_info, |
| }, |
| #endif |
| #ifdef CONFIG_PINCTRL_PFC_R8A7791 |
| { |
| .compatible = "renesas,pfc-r8a7791", |
| .data = &r8a7791_pinmux_info, |
| }, |
| #endif |
| #ifdef CONFIG_PINCTRL_PFC_R8A7792 |
| { |
| .compatible = "renesas,pfc-r8a7792", |
| .data = &r8a7792_pinmux_info, |
| }, |
| #endif |
| #ifdef CONFIG_PINCTRL_PFC_R8A7793 |
| { |
| .compatible = "renesas,pfc-r8a7793", |
| .data = &r8a7793_pinmux_info, |
| }, |
| #endif |
| #ifdef CONFIG_PINCTRL_PFC_R8A7794 |
| { |
| .compatible = "renesas,pfc-r8a7794", |
| .data = &r8a7794_pinmux_info, |
| }, |
| #endif |
| /* |
| * Both r8a7795 entries must be present to make sanity checks work, but only |
| * the first entry is actually used. |
| * R-Car H3 ES1.x is matched using soc_device_match() instead. |
| */ |
| #ifdef CONFIG_PINCTRL_PFC_R8A77951 |
| { |
| .compatible = "renesas,pfc-r8a7795", |
| .data = &r8a77951_pinmux_info, |
| }, |
| #endif |
| #ifdef CONFIG_PINCTRL_PFC_R8A77950 |
| { |
| .compatible = "renesas,pfc-r8a7795", |
| .data = &r8a77950_pinmux_info, |
| }, |
| #endif |
| #ifdef CONFIG_PINCTRL_PFC_R8A77960 |
| { |
| .compatible = "renesas,pfc-r8a7796", |
| .data = &r8a77960_pinmux_info, |
| }, |
| #endif |
| #ifdef CONFIG_PINCTRL_PFC_R8A77961 |
| { |
| .compatible = "renesas,pfc-r8a77961", |
| .data = &r8a77961_pinmux_info, |
| }, |
| #endif |
| #ifdef CONFIG_PINCTRL_PFC_R8A77965 |
| { |
| .compatible = "renesas,pfc-r8a77965", |
| .data = &r8a77965_pinmux_info, |
| }, |
| #endif |
| #ifdef CONFIG_PINCTRL_PFC_R8A77970 |
| { |
| .compatible = "renesas,pfc-r8a77970", |
| .data = &r8a77970_pinmux_info, |
| }, |
| #endif |
| #ifdef CONFIG_PINCTRL_PFC_R8A77980 |
| { |
| .compatible = "renesas,pfc-r8a77980", |
| .data = &r8a77980_pinmux_info, |
| }, |
| #endif |
| #ifdef CONFIG_PINCTRL_PFC_R8A77990 |
| { |
| .compatible = "renesas,pfc-r8a77990", |
| .data = &r8a77990_pinmux_info, |
| }, |
| #endif |
| #ifdef CONFIG_PINCTRL_PFC_R8A77995 |
| { |
| .compatible = "renesas,pfc-r8a77995", |
| .data = &r8a77995_pinmux_info, |
| }, |
| #endif |
| #ifdef CONFIG_PINCTRL_PFC_R8A779A0 |
| { |
| .compatible = "renesas,pfc-r8a779a0", |
| .data = &r8a779a0_pinmux_info, |
| }, |
| #endif |
| #ifdef CONFIG_PINCTRL_PFC_SH73A0 |
| { |
| .compatible = "renesas,pfc-sh73a0", |
| .data = &sh73a0_pinmux_info, |
| }, |
| #endif |
| { }, |
| }; |
| #endif |
| |
| #if defined(CONFIG_PM_SLEEP) && defined(CONFIG_ARM_PSCI_FW) |
| static void sh_pfc_nop_reg(struct sh_pfc *pfc, u32 reg, unsigned int idx) |
| { |
| } |
| |
| static void sh_pfc_save_reg(struct sh_pfc *pfc, u32 reg, unsigned int idx) |
| { |
| pfc->saved_regs[idx] = sh_pfc_read(pfc, reg); |
| } |
| |
| static void sh_pfc_restore_reg(struct sh_pfc *pfc, u32 reg, unsigned int idx) |
| { |
| sh_pfc_write(pfc, reg, pfc->saved_regs[idx]); |
| } |
| |
| static unsigned int sh_pfc_walk_regs(struct sh_pfc *pfc, |
| void (*do_reg)(struct sh_pfc *pfc, u32 reg, unsigned int idx)) |
| { |
| unsigned int i, n = 0; |
| |
| if (pfc->info->cfg_regs) |
| for (i = 0; pfc->info->cfg_regs[i].reg; i++) |
| do_reg(pfc, pfc->info->cfg_regs[i].reg, n++); |
| |
| if (pfc->info->drive_regs) |
| for (i = 0; pfc->info->drive_regs[i].reg; i++) |
| do_reg(pfc, pfc->info->drive_regs[i].reg, n++); |
| |
| if (pfc->info->bias_regs) |
| for (i = 0; pfc->info->bias_regs[i].puen || |
| pfc->info->bias_regs[i].pud; i++) { |
| if (pfc->info->bias_regs[i].puen) |
| do_reg(pfc, pfc->info->bias_regs[i].puen, n++); |
| if (pfc->info->bias_regs[i].pud) |
| do_reg(pfc, pfc->info->bias_regs[i].pud, n++); |
| } |
| |
| if (pfc->info->ioctrl_regs) |
| for (i = 0; pfc->info->ioctrl_regs[i].reg; i++) |
| do_reg(pfc, pfc->info->ioctrl_regs[i].reg, n++); |
| |
| return n; |
| } |
| |
| static int sh_pfc_suspend_init(struct sh_pfc *pfc) |
| { |
| unsigned int n; |
| |
| /* This is the best we can do to check for the presence of PSCI */ |
| if (!psci_ops.cpu_suspend) |
| return 0; |
| |
| n = sh_pfc_walk_regs(pfc, sh_pfc_nop_reg); |
| if (!n) |
| return 0; |
| |
| pfc->saved_regs = devm_kmalloc_array(pfc->dev, n, |
| sizeof(*pfc->saved_regs), |
| GFP_KERNEL); |
| if (!pfc->saved_regs) |
| return -ENOMEM; |
| |
| dev_dbg(pfc->dev, "Allocated space to save %u regs\n", n); |
| return 0; |
| } |
| |
| static int sh_pfc_suspend_noirq(struct device *dev) |
| { |
| struct sh_pfc *pfc = dev_get_drvdata(dev); |
| |
| if (pfc->saved_regs) |
| sh_pfc_walk_regs(pfc, sh_pfc_save_reg); |
| return 0; |
| } |
| |
| static int sh_pfc_resume_noirq(struct device *dev) |
| { |
| struct sh_pfc *pfc = dev_get_drvdata(dev); |
| |
| if (pfc->saved_regs) |
| sh_pfc_walk_regs(pfc, sh_pfc_restore_reg); |
| return 0; |
| } |
| |
| static const struct dev_pm_ops sh_pfc_pm = { |
| SET_NOIRQ_SYSTEM_SLEEP_PM_OPS(sh_pfc_suspend_noirq, sh_pfc_resume_noirq) |
| }; |
| #define DEV_PM_OPS &sh_pfc_pm |
| #else |
| static int sh_pfc_suspend_init(struct sh_pfc *pfc) { return 0; } |
| #define DEV_PM_OPS NULL |
| #endif /* CONFIG_PM_SLEEP && CONFIG_ARM_PSCI_FW */ |
| |
| #ifdef DEBUG |
| #define SH_PFC_MAX_REGS 300 |
| #define SH_PFC_MAX_ENUMS 3000 |
| |
| static unsigned int sh_pfc_errors __initdata; |
| static unsigned int sh_pfc_warnings __initdata; |
| static struct { |
| u32 reg; |
| u32 bits; |
| } *sh_pfc_regs __initdata; |
| static u32 sh_pfc_num_regs __initdata; |
| static u16 *sh_pfc_enums __initdata; |
| static u32 sh_pfc_num_enums __initdata; |
| |
| #define sh_pfc_err(fmt, ...) \ |
| do { \ |
| pr_err("%s: " fmt, drvname, ##__VA_ARGS__); \ |
| sh_pfc_errors++; \ |
| } while (0) |
| #define sh_pfc_warn(fmt, ...) \ |
| do { \ |
| pr_warn("%s: " fmt, drvname, ##__VA_ARGS__); \ |
| sh_pfc_warnings++; \ |
| } while (0) |
| |
| static bool __init is0s(const u16 *enum_ids, unsigned int n) |
| { |
| unsigned int i; |
| |
| for (i = 0; i < n; i++) |
| if (enum_ids[i]) |
| return false; |
| |
| return true; |
| } |
| |
| static bool __init same_name(const char *a, const char *b) |
| { |
| if (!a || !b) |
| return false; |
| |
| return !strcmp(a, b); |
| } |
| |
| static void __init sh_pfc_check_reg(const char *drvname, u32 reg, u32 bits) |
| { |
| unsigned int i; |
| |
| for (i = 0; i < sh_pfc_num_regs; i++) { |
| if (reg != sh_pfc_regs[i].reg) |
| continue; |
| |
| if (bits & sh_pfc_regs[i].bits) |
| sh_pfc_err("reg 0x%x: bits 0x%x conflict\n", reg, |
| bits & sh_pfc_regs[i].bits); |
| |
| sh_pfc_regs[i].bits |= bits; |
| return; |
| } |
| |
| if (sh_pfc_num_regs == SH_PFC_MAX_REGS) { |
| pr_warn_once("%s: Please increase SH_PFC_MAX_REGS\n", drvname); |
| return; |
| } |
| |
| sh_pfc_regs[sh_pfc_num_regs].reg = reg; |
| sh_pfc_regs[sh_pfc_num_regs].bits = bits; |
| sh_pfc_num_regs++; |
| } |
| |
| static int __init sh_pfc_check_enum(const char *drvname, u16 enum_id) |
| { |
| unsigned int i; |
| |
| for (i = 0; i < sh_pfc_num_enums; i++) { |
| if (enum_id == sh_pfc_enums[i]) |
| return -EINVAL; |
| } |
| |
| if (sh_pfc_num_enums == SH_PFC_MAX_ENUMS) { |
| pr_warn_once("%s: Please increase SH_PFC_MAX_ENUMS\n", drvname); |
| return 0; |
| } |
| |
| sh_pfc_enums[sh_pfc_num_enums++] = enum_id; |
| return 0; |
| } |
| |
| static void __init sh_pfc_check_reg_enums(const char *drvname, u32 reg, |
| const u16 *enums, unsigned int n) |
| { |
| unsigned int i; |
| |
| for (i = 0; i < n; i++) { |
| if (enums[i] && sh_pfc_check_enum(drvname, enums[i])) |
| sh_pfc_err("reg 0x%x enum_id %u conflict\n", reg, |
| enums[i]); |
| } |
| } |
| |
| static void __init sh_pfc_check_pin(const struct sh_pfc_soc_info *info, |
| u32 reg, unsigned int pin) |
| { |
| const char *drvname = info->name; |
| unsigned int i; |
| |
| if (pin == SH_PFC_PIN_NONE) |
| return; |
| |
| for (i = 0; i < info->nr_pins; i++) { |
| if (pin == info->pins[i].pin) |
| return; |
| } |
| |
| sh_pfc_err("reg 0x%x: pin %u not found\n", reg, pin); |
| } |
| |
| static void __init sh_pfc_check_cfg_reg(const char *drvname, |
| const struct pinmux_cfg_reg *cfg_reg) |
| { |
| unsigned int i, n, rw, fw; |
| |
| sh_pfc_check_reg(drvname, cfg_reg->reg, |
| GENMASK(cfg_reg->reg_width - 1, 0)); |
| |
| if (cfg_reg->field_width) { |
| n = cfg_reg->reg_width / cfg_reg->field_width; |
| /* Skip field checks (done at build time) */ |
| goto check_enum_ids; |
| } |
| |
| for (i = 0, n = 0, rw = 0; (fw = cfg_reg->var_field_width[i]); i++) { |
| if (fw > 3 && is0s(&cfg_reg->enum_ids[n], 1 << fw)) |
| sh_pfc_warn("reg 0x%x: reserved field [%u:%u] can be split to reduce table size\n", |
| cfg_reg->reg, rw, rw + fw - 1); |
| n += 1 << fw; |
| rw += fw; |
| } |
| |
| if (rw != cfg_reg->reg_width) |
| sh_pfc_err("reg 0x%x: var_field_width declares %u instead of %u bits\n", |
| cfg_reg->reg, rw, cfg_reg->reg_width); |
| |
| if (n != cfg_reg->nr_enum_ids) |
| sh_pfc_err("reg 0x%x: enum_ids[] has %u instead of %u values\n", |
| cfg_reg->reg, cfg_reg->nr_enum_ids, n); |
| |
| check_enum_ids: |
| sh_pfc_check_reg_enums(drvname, cfg_reg->reg, cfg_reg->enum_ids, n); |
| } |
| |
| static void __init sh_pfc_check_drive_reg(const struct sh_pfc_soc_info *info, |
| const struct pinmux_drive_reg *drive) |
| { |
| unsigned int i; |
| |
| for (i = 0; i < ARRAY_SIZE(drive->fields); i++) { |
| const struct pinmux_drive_reg_field *field = &drive->fields[i]; |
| |
| if (!field->pin && !field->offset && !field->size) |
| continue; |
| |
| sh_pfc_check_reg(info->name, drive->reg, |
| GENMASK(field->offset + field->size - 1, |
| field->offset)); |
| |
| sh_pfc_check_pin(info, drive->reg, field->pin); |
| } |
| } |
| |
| static void __init sh_pfc_check_bias_reg(const struct sh_pfc_soc_info *info, |
| const struct pinmux_bias_reg *bias) |
| { |
| unsigned int i; |
| u32 bits; |
| |
| for (i = 0, bits = 0; i < ARRAY_SIZE(bias->pins); i++) |
| if (bias->pins[i] != SH_PFC_PIN_NONE) |
| bits |= BIT(i); |
| |
| if (bias->puen) |
| sh_pfc_check_reg(info->name, bias->puen, bits); |
| if (bias->pud) |
| sh_pfc_check_reg(info->name, bias->pud, bits); |
| for (i = 0; i < ARRAY_SIZE(bias->pins); i++) |
| sh_pfc_check_pin(info, bias->puen, bias->pins[i]); |
| } |
| |
| static void __init sh_pfc_check_info(const struct sh_pfc_soc_info *info) |
| { |
| const struct pinmux_bias_reg *bias_regs = info->bias_regs; |
| const char *drvname = info->name; |
| unsigned int *refcnts; |
| unsigned int i, j, k; |
| |
| pr_info("sh_pfc: Checking %s\n", drvname); |
| sh_pfc_num_regs = 0; |
| sh_pfc_num_enums = 0; |
| |
| /* Check pins */ |
| for (i = 0; i < info->nr_pins; i++) { |
| const struct sh_pfc_pin *pin = &info->pins[i]; |
| |
| if (!pin->name) { |
| sh_pfc_err("empty pin %u\n", i); |
| continue; |
| } |
| for (j = 0; j < i; j++) { |
| const struct sh_pfc_pin *pin2 = &info->pins[j]; |
| |
| if (same_name(pin->name, pin2->name)) |
| sh_pfc_err("pin %s: name conflict\n", |
| pin->name); |
| |
| if (pin->pin != (u16)-1 && pin->pin == pin2->pin) |
| sh_pfc_err("pin %s/%s: pin %u conflict\n", |
| pin->name, pin2->name, pin->pin); |
| |
| if (pin->enum_id && pin->enum_id == pin2->enum_id) |
| sh_pfc_err("pin %s/%s: enum_id %u conflict\n", |
| pin->name, pin2->name, |
| pin->enum_id); |
| } |
| } |
| |
| /* Check groups and functions */ |
| refcnts = kcalloc(info->nr_groups, sizeof(*refcnts), GFP_KERNEL); |
| if (!refcnts) |
| return; |
| |
| for (i = 0; i < info->nr_functions; i++) { |
| const struct sh_pfc_function *func = &info->functions[i]; |
| |
| if (!func->name) { |
| sh_pfc_err("empty function %u\n", i); |
| continue; |
| } |
| for (j = 0; j < i; j++) { |
| if (same_name(func->name, info->functions[j].name)) |
| sh_pfc_err("function %s: name conflict\n", |
| func->name); |
| } |
| for (j = 0; j < func->nr_groups; j++) { |
| for (k = 0; k < info->nr_groups; k++) { |
| if (same_name(func->groups[j], |
| info->groups[k].name)) { |
| refcnts[k]++; |
| break; |
| } |
| } |
| |
| if (k == info->nr_groups) |
| sh_pfc_err("function %s: group %s not found\n", |
| func->name, func->groups[j]); |
| } |
| } |
| |
| for (i = 0; i < info->nr_groups; i++) { |
| const struct sh_pfc_pin_group *group = &info->groups[i]; |
| |
| if (!group->name) { |
| sh_pfc_err("empty group %u\n", i); |
| continue; |
| } |
| for (j = 0; j < i; j++) { |
| if (same_name(group->name, info->groups[j].name)) |
| sh_pfc_err("group %s: name conflict\n", |
| group->name); |
| } |
| if (!refcnts[i]) |
| sh_pfc_err("orphan group %s\n", group->name); |
| else if (refcnts[i] > 1) |
| sh_pfc_warn("group %s referenced by %u functions\n", |
| group->name, refcnts[i]); |
| } |
| |
| kfree(refcnts); |
| |
| /* Check config register descriptions */ |
| for (i = 0; info->cfg_regs && info->cfg_regs[i].reg; i++) |
| sh_pfc_check_cfg_reg(drvname, &info->cfg_regs[i]); |
| |
| /* Check drive strength registers */ |
| for (i = 0; info->drive_regs && info->drive_regs[i].reg; i++) |
| sh_pfc_check_drive_reg(info, &info->drive_regs[i]); |
| |
| /* Check bias registers */ |
| for (i = 0; bias_regs && (bias_regs[i].puen || bias_regs[i].pud); i++) |
| sh_pfc_check_bias_reg(info, &bias_regs[i]); |
| |
| /* Check ioctrl registers */ |
| for (i = 0; info->ioctrl_regs && info->ioctrl_regs[i].reg; i++) |
| sh_pfc_check_reg(drvname, info->ioctrl_regs[i].reg, U32_MAX); |
| |
| /* Check data registers */ |
| for (i = 0; info->data_regs && info->data_regs[i].reg; i++) { |
| sh_pfc_check_reg(drvname, info->data_regs[i].reg, |
| GENMASK(info->data_regs[i].reg_width - 1, 0)); |
| sh_pfc_check_reg_enums(drvname, info->data_regs[i].reg, |
| info->data_regs[i].enum_ids, |
| info->data_regs[i].reg_width); |
| } |
| |
| #ifdef CONFIG_PINCTRL_SH_FUNC_GPIO |
| /* Check function GPIOs */ |
| for (i = 0; i < info->nr_func_gpios; i++) { |
| const struct pinmux_func *func = &info->func_gpios[i]; |
| |
| if (!func->name) { |
| sh_pfc_err("empty function gpio %u\n", i); |
| continue; |
| } |
| for (j = 0; j < i; j++) { |
| if (same_name(func->name, info->func_gpios[j].name)) |
| sh_pfc_err("func_gpio %s: name conflict\n", |
| func->name); |
| } |
| if (sh_pfc_check_enum(drvname, func->enum_id)) |
| sh_pfc_err("%s enum_id %u conflict\n", func->name, |
| func->enum_id); |
| } |
| #endif |
| } |
| |
| static void __init sh_pfc_check_driver(const struct platform_driver *pdrv) |
| { |
| unsigned int i; |
| |
| if (!IS_ENABLED(CONFIG_SUPERH) && |
| !of_find_matching_node(NULL, pdrv->driver.of_match_table)) |
| return; |
| |
| sh_pfc_regs = kcalloc(SH_PFC_MAX_REGS, sizeof(*sh_pfc_regs), |
| GFP_KERNEL); |
| if (!sh_pfc_regs) |
| return; |
| |
| sh_pfc_enums = kcalloc(SH_PFC_MAX_ENUMS, sizeof(*sh_pfc_enums), |
| GFP_KERNEL); |
| if (!sh_pfc_enums) |
| goto free_regs; |
| |
| pr_warn("sh_pfc: Checking builtin pinmux tables\n"); |
| |
| for (i = 0; pdrv->id_table[i].name[0]; i++) |
| sh_pfc_check_info((void *)pdrv->id_table[i].driver_data); |
| |
| #ifdef CONFIG_OF |
| for (i = 0; pdrv->driver.of_match_table[i].compatible[0]; i++) |
| sh_pfc_check_info(pdrv->driver.of_match_table[i].data); |
| #endif |
| |
| pr_warn("sh_pfc: Detected %u errors and %u warnings\n", sh_pfc_errors, |
| sh_pfc_warnings); |
| |
| kfree(sh_pfc_enums); |
| free_regs: |
| kfree(sh_pfc_regs); |
| } |
| |
| #else /* !DEBUG */ |
| static inline void sh_pfc_check_driver(struct platform_driver *pdrv) {} |
| #endif /* !DEBUG */ |
| |
| #ifdef CONFIG_OF |
| static const void *sh_pfc_quirk_match(void) |
| { |
| #ifdef CONFIG_PINCTRL_PFC_R8A77950 |
| const struct soc_device_attribute *match; |
| static const struct soc_device_attribute quirks[] = { |
| { |
| .soc_id = "r8a7795", .revision = "ES1.*", |
| .data = &r8a77950_pinmux_info, |
| }, |
| { /* sentinel */ } |
| }; |
| |
| match = soc_device_match(quirks); |
| if (match) |
| return match->data; |
| #endif /* CONFIG_PINCTRL_PFC_R8A77950 */ |
| |
| return NULL; |
| } |
| #endif /* CONFIG_OF */ |
| |
| static int sh_pfc_probe(struct platform_device *pdev) |
| { |
| const struct sh_pfc_soc_info *info; |
| struct sh_pfc *pfc; |
| int ret; |
| |
| #ifdef CONFIG_OF |
| if (pdev->dev.of_node) { |
| info = sh_pfc_quirk_match(); |
| if (!info) |
| info = of_device_get_match_data(&pdev->dev); |
| } else |
| #endif |
| info = (const void *)platform_get_device_id(pdev)->driver_data; |
| |
| pfc = devm_kzalloc(&pdev->dev, sizeof(*pfc), GFP_KERNEL); |
| if (pfc == NULL) |
| return -ENOMEM; |
| |
| pfc->info = info; |
| pfc->dev = &pdev->dev; |
| |
| ret = sh_pfc_map_resources(pfc, pdev); |
| if (unlikely(ret < 0)) |
| return ret; |
| |
| spin_lock_init(&pfc->lock); |
| |
| if (info->ops && info->ops->init) { |
| ret = info->ops->init(pfc); |
| if (ret < 0) |
| return ret; |
| |
| /* .init() may have overridden pfc->info */ |
| info = pfc->info; |
| } |
| |
| ret = sh_pfc_suspend_init(pfc); |
| if (ret) |
| return ret; |
| |
| /* Enable dummy states for those platforms without pinctrl support */ |
| if (!of_have_populated_dt()) |
| pinctrl_provide_dummies(); |
| |
| ret = sh_pfc_init_ranges(pfc); |
| if (ret < 0) |
| return ret; |
| |
| /* |
| * Initialize pinctrl bindings first |
| */ |
| ret = sh_pfc_register_pinctrl(pfc); |
| if (unlikely(ret != 0)) |
| return ret; |
| |
| #ifdef CONFIG_PINCTRL_SH_PFC_GPIO |
| /* |
| * Then the GPIO chip |
| */ |
| ret = sh_pfc_register_gpiochip(pfc); |
| if (unlikely(ret != 0)) { |
| /* |
| * If the GPIO chip fails to come up we still leave the |
| * PFC state as it is, given that there are already |
| * extant users of it that have succeeded by this point. |
| */ |
| dev_notice(pfc->dev, "failed to init GPIO chip, ignoring...\n"); |
| } |
| #endif |
| |
| platform_set_drvdata(pdev, pfc); |
| |
| dev_info(pfc->dev, "%s support registered\n", info->name); |
| |
| return 0; |
| } |
| |
| static const struct platform_device_id sh_pfc_id_table[] = { |
| #ifdef CONFIG_PINCTRL_PFC_SH7203 |
| { "pfc-sh7203", (kernel_ulong_t)&sh7203_pinmux_info }, |
| #endif |
| #ifdef CONFIG_PINCTRL_PFC_SH7264 |
| { "pfc-sh7264", (kernel_ulong_t)&sh7264_pinmux_info }, |
| #endif |
| #ifdef CONFIG_PINCTRL_PFC_SH7269 |
| { "pfc-sh7269", (kernel_ulong_t)&sh7269_pinmux_info }, |
| #endif |
| #ifdef CONFIG_PINCTRL_PFC_SH7720 |
| { "pfc-sh7720", (kernel_ulong_t)&sh7720_pinmux_info }, |
| #endif |
| #ifdef CONFIG_PINCTRL_PFC_SH7722 |
| { "pfc-sh7722", (kernel_ulong_t)&sh7722_pinmux_info }, |
| #endif |
| #ifdef CONFIG_PINCTRL_PFC_SH7723 |
| { "pfc-sh7723", (kernel_ulong_t)&sh7723_pinmux_info }, |
| #endif |
| #ifdef CONFIG_PINCTRL_PFC_SH7724 |
| { "pfc-sh7724", (kernel_ulong_t)&sh7724_pinmux_info }, |
| #endif |
| #ifdef CONFIG_PINCTRL_PFC_SH7734 |
| { "pfc-sh7734", (kernel_ulong_t)&sh7734_pinmux_info }, |
| #endif |
| #ifdef CONFIG_PINCTRL_PFC_SH7757 |
| { "pfc-sh7757", (kernel_ulong_t)&sh7757_pinmux_info }, |
| #endif |
| #ifdef CONFIG_PINCTRL_PFC_SH7785 |
| { "pfc-sh7785", (kernel_ulong_t)&sh7785_pinmux_info }, |
| #endif |
| #ifdef CONFIG_PINCTRL_PFC_SH7786 |
| { "pfc-sh7786", (kernel_ulong_t)&sh7786_pinmux_info }, |
| #endif |
| #ifdef CONFIG_PINCTRL_PFC_SHX3 |
| { "pfc-shx3", (kernel_ulong_t)&shx3_pinmux_info }, |
| #endif |
| { }, |
| }; |
| |
| static struct platform_driver sh_pfc_driver = { |
| .probe = sh_pfc_probe, |
| .id_table = sh_pfc_id_table, |
| .driver = { |
| .name = DRV_NAME, |
| .of_match_table = of_match_ptr(sh_pfc_of_table), |
| .pm = DEV_PM_OPS, |
| }, |
| }; |
| |
| static int __init sh_pfc_init(void) |
| { |
| sh_pfc_check_driver(&sh_pfc_driver); |
| return platform_driver_register(&sh_pfc_driver); |
| } |
| postcore_initcall(sh_pfc_init); |
