| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| Chia-Wei, Wang | 2109 | 100.00% | 1 | 100.00% |
| Total | 2109 | 1 |
// SPDX-License-Identifier: GPL-2.0+ /* * Copyright (c) 2018 Google LLC * Copyright (c) 2021 Aspeed Technology Inc. */ #include <linux/device.h> #include <linux/module.h> #include <linux/of_device.h> #include <linux/of_platform.h> #include <linux/mfd/syscon.h> #include <linux/regmap.h> #include <linux/platform_device.h> /* register offsets */ #define HICR9 0x98 #define HICRA 0x9c /* attributes options */ #define UART_ROUTING_IO1 "io1" #define UART_ROUTING_IO2 "io2" #define UART_ROUTING_IO3 "io3" #define UART_ROUTING_IO4 "io4" #define UART_ROUTING_IO5 "io5" #define UART_ROUTING_IO6 "io6" #define UART_ROUTING_IO10 "io10" #define UART_ROUTING_UART1 "uart1" #define UART_ROUTING_UART2 "uart2" #define UART_ROUTING_UART3 "uart3" #define UART_ROUTING_UART4 "uart4" #define UART_ROUTING_UART5 "uart5" #define UART_ROUTING_UART6 "uart6" #define UART_ROUTING_UART10 "uart10" #define UART_ROUTING_RES "reserved" struct aspeed_uart_routing { struct regmap *map; struct attribute_group const *attr_grp; }; struct aspeed_uart_routing_selector { struct device_attribute dev_attr; uint8_t reg; uint8_t mask; uint8_t shift; const char *const options[]; }; #define to_routing_selector(_dev_attr) \ container_of(_dev_attr, struct aspeed_uart_routing_selector, dev_attr) static ssize_t aspeed_uart_routing_show(struct device *dev, struct device_attribute *attr, char *buf); static ssize_t aspeed_uart_routing_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t count); #define ROUTING_ATTR(_name) { \ .attr = {.name = _name, \ .mode = VERIFY_OCTAL_PERMISSIONS(0644) }, \ .show = aspeed_uart_routing_show, \ .store = aspeed_uart_routing_store, \ } /* routing selector for AST25xx */ static struct aspeed_uart_routing_selector ast2500_io6_sel = { .dev_attr = ROUTING_ATTR(UART_ROUTING_IO6), .reg = HICR9, .shift = 8, .mask = 0xf, .options = { UART_ROUTING_UART1, UART_ROUTING_UART2, UART_ROUTING_UART3, UART_ROUTING_UART4, UART_ROUTING_UART5, UART_ROUTING_IO1, UART_ROUTING_IO2, UART_ROUTING_IO3, UART_ROUTING_IO4, UART_ROUTING_IO5, NULL, }, }; static struct aspeed_uart_routing_selector ast2500_uart5_sel = { .dev_attr = ROUTING_ATTR(UART_ROUTING_UART5), .reg = HICRA, .shift = 28, .mask = 0xf, .options = { UART_ROUTING_IO5, UART_ROUTING_IO1, UART_ROUTING_IO2, UART_ROUTING_IO3, UART_ROUTING_IO4, UART_ROUTING_UART1, UART_ROUTING_UART2, UART_ROUTING_UART3, UART_ROUTING_UART4, UART_ROUTING_IO6, NULL, }, }; static struct aspeed_uart_routing_selector ast2500_uart4_sel = { .dev_attr = ROUTING_ATTR(UART_ROUTING_UART4), .reg = HICRA, .shift = 25, .mask = 0x7, .options = { UART_ROUTING_IO4, UART_ROUTING_IO1, UART_ROUTING_IO2, UART_ROUTING_IO3, UART_ROUTING_UART1, UART_ROUTING_UART2, UART_ROUTING_UART3, UART_ROUTING_IO6, NULL, }, }; static struct aspeed_uart_routing_selector ast2500_uart3_sel = { .dev_attr = ROUTING_ATTR(UART_ROUTING_UART3), .reg = HICRA, .shift = 22, .mask = 0x7, .options = { UART_ROUTING_IO3, UART_ROUTING_IO4, UART_ROUTING_IO1, UART_ROUTING_IO2, UART_ROUTING_UART4, UART_ROUTING_UART1, UART_ROUTING_UART2, UART_ROUTING_IO6, NULL, }, }; static struct aspeed_uart_routing_selector ast2500_uart2_sel = { .dev_attr = ROUTING_ATTR(UART_ROUTING_UART2), .reg = HICRA, .shift = 19, .mask = 0x7, .options = { UART_ROUTING_IO2, UART_ROUTING_IO3, UART_ROUTING_IO4, UART_ROUTING_IO1, UART_ROUTING_UART3, UART_ROUTING_UART4, UART_ROUTING_UART1, UART_ROUTING_IO6, NULL, }, }; static struct aspeed_uart_routing_selector ast2500_uart1_sel = { .dev_attr = ROUTING_ATTR(UART_ROUTING_UART1), .reg = HICRA, .shift = 16, .mask = 0x7, .options = { UART_ROUTING_IO1, UART_ROUTING_IO2, UART_ROUTING_IO3, UART_ROUTING_IO4, UART_ROUTING_UART2, UART_ROUTING_UART3, UART_ROUTING_UART4, UART_ROUTING_IO6, NULL, }, }; static struct aspeed_uart_routing_selector ast2500_io5_sel = { .dev_attr = ROUTING_ATTR(UART_ROUTING_IO5), .reg = HICRA, .shift = 12, .mask = 0x7, .options = { UART_ROUTING_UART5, UART_ROUTING_UART1, UART_ROUTING_UART2, UART_ROUTING_UART3, UART_ROUTING_UART4, UART_ROUTING_IO1, UART_ROUTING_IO3, UART_ROUTING_IO6, NULL, }, }; static struct aspeed_uart_routing_selector ast2500_io4_sel = { .dev_attr = ROUTING_ATTR(UART_ROUTING_IO4), .reg = HICRA, .shift = 9, .mask = 0x7, .options = { UART_ROUTING_UART4, UART_ROUTING_UART5, UART_ROUTING_UART1, UART_ROUTING_UART2, UART_ROUTING_UART3, UART_ROUTING_IO1, UART_ROUTING_IO2, UART_ROUTING_IO6, NULL, }, }; static struct aspeed_uart_routing_selector ast2500_io3_sel = { .dev_attr = ROUTING_ATTR(UART_ROUTING_IO3), .reg = HICRA, .shift = 6, .mask = 0x7, .options = { UART_ROUTING_UART3, UART_ROUTING_UART4, UART_ROUTING_UART5, UART_ROUTING_UART1, UART_ROUTING_UART2, UART_ROUTING_IO1, UART_ROUTING_IO2, UART_ROUTING_IO6, NULL, }, }; static struct aspeed_uart_routing_selector ast2500_io2_sel = { .dev_attr = ROUTING_ATTR(UART_ROUTING_IO2), .reg = HICRA, .shift = 3, .mask = 0x7, .options = { UART_ROUTING_UART2, UART_ROUTING_UART3, UART_ROUTING_UART4, UART_ROUTING_UART5, UART_ROUTING_UART1, UART_ROUTING_IO3, UART_ROUTING_IO4, UART_ROUTING_IO6, NULL, }, }; static struct aspeed_uart_routing_selector ast2500_io1_sel = { .dev_attr = ROUTING_ATTR(UART_ROUTING_IO1), .reg = HICRA, .shift = 0, .mask = 0x7, .options = { UART_ROUTING_UART1, UART_ROUTING_UART2, UART_ROUTING_UART3, UART_ROUTING_UART4, UART_ROUTING_UART5, UART_ROUTING_IO3, UART_ROUTING_IO4, UART_ROUTING_IO6, NULL, }, }; static struct attribute *ast2500_uart_routing_attrs[] = { &ast2500_io6_sel.dev_attr.attr, &ast2500_uart5_sel.dev_attr.attr, &ast2500_uart4_sel.dev_attr.attr, &ast2500_uart3_sel.dev_attr.attr, &ast2500_uart2_sel.dev_attr.attr, &ast2500_uart1_sel.dev_attr.attr, &ast2500_io5_sel.dev_attr.attr, &ast2500_io4_sel.dev_attr.attr, &ast2500_io3_sel.dev_attr.attr, &ast2500_io2_sel.dev_attr.attr, &ast2500_io1_sel.dev_attr.attr, NULL, }; static const struct attribute_group ast2500_uart_routing_attr_group = { .attrs = ast2500_uart_routing_attrs, }; /* routing selector for AST26xx */ static struct aspeed_uart_routing_selector ast2600_uart10_sel = { .dev_attr = ROUTING_ATTR(UART_ROUTING_UART10), .reg = HICR9, .shift = 12, .mask = 0xf, .options = { UART_ROUTING_IO10, UART_ROUTING_IO1, UART_ROUTING_IO2, UART_ROUTING_IO3, UART_ROUTING_IO4, UART_ROUTING_RES, UART_ROUTING_UART1, UART_ROUTING_UART2, UART_ROUTING_UART3, UART_ROUTING_UART4, NULL, }, }; static struct aspeed_uart_routing_selector ast2600_io10_sel = { .dev_attr = ROUTING_ATTR(UART_ROUTING_IO10), .reg = HICR9, .shift = 8, .mask = 0xf, .options = { UART_ROUTING_UART1, UART_ROUTING_UART2, UART_ROUTING_UART3, UART_ROUTING_UART4, UART_ROUTING_RES, UART_ROUTING_IO1, UART_ROUTING_IO2, UART_ROUTING_IO3, UART_ROUTING_IO4, UART_ROUTING_RES, UART_ROUTING_UART10, NULL, }, }; static struct aspeed_uart_routing_selector ast2600_uart4_sel = { .dev_attr = ROUTING_ATTR(UART_ROUTING_UART4), .reg = HICRA, .shift = 25, .mask = 0x7, .options = { UART_ROUTING_IO4, UART_ROUTING_IO1, UART_ROUTING_IO2, UART_ROUTING_IO3, UART_ROUTING_UART1, UART_ROUTING_UART2, UART_ROUTING_UART3, UART_ROUTING_IO10, NULL, }, }; static struct aspeed_uart_routing_selector ast2600_uart3_sel = { .dev_attr = ROUTING_ATTR(UART_ROUTING_UART3), .reg = HICRA, .shift = 22, .mask = 0x7, .options = { UART_ROUTING_IO3, UART_ROUTING_IO4, UART_ROUTING_IO1, UART_ROUTING_IO2, UART_ROUTING_UART4, UART_ROUTING_UART1, UART_ROUTING_UART2, UART_ROUTING_IO10, NULL, }, }; static struct aspeed_uart_routing_selector ast2600_uart2_sel = { .dev_attr = ROUTING_ATTR(UART_ROUTING_UART2), .reg = HICRA, .shift = 19, .mask = 0x7, .options = { UART_ROUTING_IO2, UART_ROUTING_IO3, UART_ROUTING_IO4, UART_ROUTING_IO1, UART_ROUTING_UART3, UART_ROUTING_UART4, UART_ROUTING_UART1, UART_ROUTING_IO10, NULL, }, }; static struct aspeed_uart_routing_selector ast2600_uart1_sel = { .dev_attr = ROUTING_ATTR(UART_ROUTING_UART1), .reg = HICRA, .shift = 16, .mask = 0x7, .options = { UART_ROUTING_IO1, UART_ROUTING_IO2, UART_ROUTING_IO3, UART_ROUTING_IO4, UART_ROUTING_UART2, UART_ROUTING_UART3, UART_ROUTING_UART4, UART_ROUTING_IO10, NULL, }, }; static struct aspeed_uart_routing_selector ast2600_io4_sel = { .dev_attr = ROUTING_ATTR(UART_ROUTING_IO4), .reg = HICRA, .shift = 9, .mask = 0x7, .options = { UART_ROUTING_UART4, UART_ROUTING_UART10, UART_ROUTING_UART1, UART_ROUTING_UART2, UART_ROUTING_UART3, UART_ROUTING_IO1, UART_ROUTING_IO2, UART_ROUTING_IO10, NULL, }, }; static struct aspeed_uart_routing_selector ast2600_io3_sel = { .dev_attr = ROUTING_ATTR(UART_ROUTING_IO3), .reg = HICRA, .shift = 6, .mask = 0x7, .options = { UART_ROUTING_UART3, UART_ROUTING_UART4, UART_ROUTING_UART10, UART_ROUTING_UART1, UART_ROUTING_UART2, UART_ROUTING_IO1, UART_ROUTING_IO2, UART_ROUTING_IO10, NULL, }, }; static struct aspeed_uart_routing_selector ast2600_io2_sel = { .dev_attr = ROUTING_ATTR(UART_ROUTING_IO2), .reg = HICRA, .shift = 3, .mask = 0x7, .options = { UART_ROUTING_UART2, UART_ROUTING_UART3, UART_ROUTING_UART4, UART_ROUTING_UART10, UART_ROUTING_UART1, UART_ROUTING_IO3, UART_ROUTING_IO4, UART_ROUTING_IO10, NULL, }, }; static struct aspeed_uart_routing_selector ast2600_io1_sel = { .dev_attr = ROUTING_ATTR(UART_ROUTING_IO1), .reg = HICRA, .shift = 0, .mask = 0x7, .options = { UART_ROUTING_UART1, UART_ROUTING_UART2, UART_ROUTING_UART3, UART_ROUTING_UART4, UART_ROUTING_UART10, UART_ROUTING_IO3, UART_ROUTING_IO4, UART_ROUTING_IO10, NULL, }, }; static struct attribute *ast2600_uart_routing_attrs[] = { &ast2600_uart10_sel.dev_attr.attr, &ast2600_io10_sel.dev_attr.attr, &ast2600_uart4_sel.dev_attr.attr, &ast2600_uart3_sel.dev_attr.attr, &ast2600_uart2_sel.dev_attr.attr, &ast2600_uart1_sel.dev_attr.attr, &ast2600_io4_sel.dev_attr.attr, &ast2600_io3_sel.dev_attr.attr, &ast2600_io2_sel.dev_attr.attr, &ast2600_io1_sel.dev_attr.attr, NULL, }; static const struct attribute_group ast2600_uart_routing_attr_group = { .attrs = ast2600_uart_routing_attrs, }; static ssize_t aspeed_uart_routing_show(struct device *dev, struct device_attribute *attr, char *buf) { struct aspeed_uart_routing *uart_routing = dev_get_drvdata(dev); struct aspeed_uart_routing_selector *sel = to_routing_selector(attr); int val, pos, len; regmap_read(uart_routing->map, sel->reg, &val); val = (val >> sel->shift) & sel->mask; len = 0; for (pos = 0; sel->options[pos] != NULL; ++pos) { if (pos == val) len += sysfs_emit_at(buf, len, "[%s] ", sel->options[pos]); else len += sysfs_emit_at(buf, len, "%s ", sel->options[pos]); } if (val >= pos) len += sysfs_emit_at(buf, len, "[unknown(%d)]", val); len += sysfs_emit_at(buf, len, "\n"); return len; } static ssize_t aspeed_uart_routing_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { struct aspeed_uart_routing *uart_routing = dev_get_drvdata(dev); struct aspeed_uart_routing_selector *sel = to_routing_selector(attr); int val; val = match_string(sel->options, -1, buf); if (val < 0) { dev_err(dev, "invalid value \"%s\"\n", buf); return -EINVAL; } regmap_update_bits(uart_routing->map, sel->reg, (sel->mask << sel->shift), (val & sel->mask) << sel->shift); return count; } static int aspeed_uart_routing_probe(struct platform_device *pdev) { int rc; struct device *dev = &pdev->dev; struct aspeed_uart_routing *uart_routing; uart_routing = devm_kzalloc(&pdev->dev, sizeof(*uart_routing), GFP_KERNEL); if (!uart_routing) return -ENOMEM; uart_routing->map = syscon_node_to_regmap(dev->parent->of_node); if (IS_ERR(uart_routing->map)) { dev_err(dev, "cannot get regmap\n"); return PTR_ERR(uart_routing->map); } uart_routing->attr_grp = of_device_get_match_data(dev); rc = sysfs_create_group(&dev->kobj, uart_routing->attr_grp); if (rc < 0) return rc; dev_set_drvdata(dev, uart_routing); dev_info(dev, "module loaded\n"); return 0; } static int aspeed_uart_routing_remove(struct platform_device *pdev) { struct device *dev = &pdev->dev; struct aspeed_uart_routing *uart_routing = platform_get_drvdata(pdev); sysfs_remove_group(&dev->kobj, uart_routing->attr_grp); return 0; } static const struct of_device_id aspeed_uart_routing_table[] = { { .compatible = "aspeed,ast2400-uart-routing", .data = &ast2500_uart_routing_attr_group }, { .compatible = "aspeed,ast2500-uart-routing", .data = &ast2500_uart_routing_attr_group }, { .compatible = "aspeed,ast2600-uart-routing", .data = &ast2600_uart_routing_attr_group }, { }, }; static struct platform_driver aspeed_uart_routing_driver = { .driver = { .name = "aspeed-uart-routing", .of_match_table = aspeed_uart_routing_table, }, .probe = aspeed_uart_routing_probe, .remove = aspeed_uart_routing_remove, }; module_platform_driver(aspeed_uart_routing_driver); MODULE_AUTHOR("Oskar Senft <osk@google.com>"); MODULE_AUTHOR("Chia-Wei Wang <chiawei_wang@aspeedtech.com>"); MODULE_LICENSE("GPL v2"); MODULE_DESCRIPTION("Driver to configure Aspeed UART routing");
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