diff options
Diffstat (limited to 'drivers/usb/fotg210/fotg210-core.c')
| -rw-r--r-- | drivers/usb/fotg210/fotg210-core.c | 88 |
1 files changed, 71 insertions, 17 deletions
diff --git a/drivers/usb/fotg210/fotg210-core.c b/drivers/usb/fotg210/fotg210-core.c index 8a54edf921ac..cb75464ab290 100644 --- a/drivers/usb/fotg210/fotg210-core.c +++ b/drivers/usb/fotg210/fotg210-core.c @@ -6,6 +6,7 @@ * driver. */ #include <linux/bitops.h> +#include <linux/clk.h> #include <linux/device.h> #include <linux/mfd/syscon.h> #include <linux/module.h> @@ -17,6 +18,11 @@ #include "fotg210.h" +/* Role Register 0x80 */ +#define FOTG210_RR 0x80 +#define FOTG210_RR_ID BIT(21) /* 1 = B-device, 0 = A-device */ +#define FOTG210_RR_CROLE BIT(20) /* 1 = device, 0 = host */ + /* * Gemini-specific initialization function, only executed on the * Gemini SoC using the global misc control register. @@ -33,9 +39,10 @@ #define GEMINI_MISC_USB0_MINI_B BIT(29) #define GEMINI_MISC_USB1_MINI_B BIT(30) -static int fotg210_gemini_init(struct device *dev, struct resource *res, +static int fotg210_gemini_init(struct fotg210 *fotg, struct resource *res, enum usb_dr_mode mode) { + struct device *dev = fotg->dev; struct device_node *np = dev->of_node; struct regmap *map; bool wakeup; @@ -43,10 +50,9 @@ static int fotg210_gemini_init(struct device *dev, struct resource *res, int ret; map = syscon_regmap_lookup_by_phandle(np, "syscon"); - if (IS_ERR(map)) { - dev_err(dev, "no syscon\n"); - return PTR_ERR(map); - } + if (IS_ERR(map)) + return dev_err_probe(dev, PTR_ERR(map), "no syscon\n"); + fotg->map = map; wakeup = of_property_read_bool(np, "wakeup-source"); /* @@ -55,6 +61,7 @@ static int fotg210_gemini_init(struct device *dev, struct resource *res, */ mask = 0; if (res->start == 0x69000000) { + fotg->port = GEMINI_PORT_1; mask = GEMINI_MISC_USB1_VBUS_ON | GEMINI_MISC_USB1_MINI_B | GEMINI_MISC_USB1_WAKEUP; if (mode == USB_DR_MODE_HOST) @@ -64,6 +71,7 @@ static int fotg210_gemini_init(struct device *dev, struct resource *res, if (wakeup) val |= GEMINI_MISC_USB1_WAKEUP; } else { + fotg->port = GEMINI_PORT_0; mask = GEMINI_MISC_USB0_VBUS_ON | GEMINI_MISC_USB0_MINI_B | GEMINI_MISC_USB0_WAKEUP; if (mode == USB_DR_MODE_HOST) @@ -85,27 +93,74 @@ static int fotg210_gemini_init(struct device *dev, struct resource *res, return 0; } +/** + * fotg210_vbus() - Called by gadget driver to enable/disable VBUS + * @enable: true to enable VBUS, false to disable VBUS + */ +void fotg210_vbus(struct fotg210 *fotg, bool enable) +{ + u32 mask; + u32 val; + int ret; + + switch (fotg->port) { + case GEMINI_PORT_0: + mask = GEMINI_MISC_USB0_VBUS_ON; + val = enable ? GEMINI_MISC_USB0_VBUS_ON : 0; + break; + case GEMINI_PORT_1: + mask = GEMINI_MISC_USB1_VBUS_ON; + val = enable ? GEMINI_MISC_USB1_VBUS_ON : 0; + break; + default: + return; + } + ret = regmap_update_bits(fotg->map, GEMINI_GLOBAL_MISC_CTRL, mask, val); + if (ret) + dev_err(fotg->dev, "failed to %s VBUS\n", + enable ? "enable" : "disable"); + dev_info(fotg->dev, "%s: %s VBUS\n", __func__, enable ? "enable" : "disable"); +} + static int fotg210_probe(struct platform_device *pdev) { struct device *dev = &pdev->dev; enum usb_dr_mode mode; + struct fotg210 *fotg; + u32 val; int ret; + fotg = devm_kzalloc(dev, sizeof(*fotg), GFP_KERNEL); + if (!fotg) + return -ENOMEM; + fotg->dev = dev; + + fotg->base = devm_platform_get_and_ioremap_resource(pdev, 0, &fotg->res); + if (IS_ERR(fotg->base)) + return PTR_ERR(fotg->base); + + fotg->pclk = devm_clk_get_optional_enabled(dev, "PCLK"); + if (IS_ERR(fotg->pclk)) + return PTR_ERR(fotg->pclk); + mode = usb_get_dr_mode(dev); if (of_device_is_compatible(dev->of_node, "cortina,gemini-usb")) { - struct resource *res; - - res = platform_get_resource(pdev, IORESOURCE_MEM, 0); - ret = fotg210_gemini_init(dev, res, mode); + ret = fotg210_gemini_init(fotg, fotg->res, mode); if (ret) return ret; } - if (mode == USB_DR_MODE_PERIPHERAL) - ret = fotg210_udc_probe(pdev); - else - ret = fotg210_hcd_probe(pdev); + val = readl(fotg->base + FOTG210_RR); + if (mode == USB_DR_MODE_PERIPHERAL) { + if (!(val & FOTG210_RR_CROLE)) + dev_err(dev, "block not in device role\n"); + ret = fotg210_udc_probe(pdev, fotg); + } else { + if (val & FOTG210_RR_CROLE) + dev_err(dev, "block not in host role\n"); + ret = fotg210_hcd_probe(pdev, fotg); + } return ret; } @@ -127,7 +182,9 @@ static int fotg210_remove(struct platform_device *pdev) #ifdef CONFIG_OF static const struct of_device_id fotg210_of_match[] = { + { .compatible = "faraday,fotg200" }, { .compatible = "faraday,fotg210" }, + /* TODO: can we also handle FUSB220? */ {}, }; MODULE_DEVICE_TABLE(of, fotg210_of_match); @@ -144,10 +201,7 @@ static struct platform_driver fotg210_driver = { static int __init fotg210_init(void) { - if (usb_disabled()) - return -ENODEV; - - if (IS_ENABLED(CONFIG_USB_FOTG210_HCD)) + if (IS_ENABLED(CONFIG_USB_FOTG210_HCD) && !usb_disabled()) fotg210_hcd_init(); return platform_driver_register(&fotg210_driver); } |