diff options
Diffstat (limited to 'drivers/usb/host/ohci-omap.c')
-rw-r--r-- | drivers/usb/host/ohci-omap.c | 144 |
1 files changed, 81 insertions, 63 deletions
diff --git a/drivers/usb/host/ohci-omap.c b/drivers/usb/host/ohci-omap.c index d8d35d456456..9ccdf2c216b5 100644 --- a/drivers/usb/host/ohci-omap.c +++ b/drivers/usb/host/ohci-omap.c @@ -18,7 +18,7 @@ #include <linux/clk.h> #include <linux/dma-mapping.h> #include <linux/err.h> -#include <linux/gpio.h> +#include <linux/gpio/consumer.h> #include <linux/io.h> #include <linux/jiffies.h> #include <linux/kernel.h> @@ -53,38 +53,29 @@ #define DRIVER_DESC "OHCI OMAP driver" -#ifdef CONFIG_TPS65010 -#include <linux/mfd/tps65010.h> -#else - -#define LOW 0 -#define HIGH 1 - -#define GPIO1 1 - -static inline int tps65010_set_gpio_out_value(unsigned gpio, unsigned value) -{ - return 0; -} - -#endif - -static struct clk *usb_host_ck; -static struct clk *usb_dc_ck; +struct ohci_omap_priv { + struct clk *usb_host_ck; + struct clk *usb_dc_ck; + struct gpio_desc *power; + struct gpio_desc *overcurrent; +}; static const char hcd_name[] = "ohci-omap"; static struct hc_driver __read_mostly ohci_omap_hc_driver; -static void omap_ohci_clock_power(int on) +#define hcd_to_ohci_omap_priv(h) \ + ((struct ohci_omap_priv *)hcd_to_ohci(h)->priv) + +static void omap_ohci_clock_power(struct ohci_omap_priv *priv, int on) { if (on) { - clk_enable(usb_dc_ck); - clk_enable(usb_host_ck); + clk_enable(priv->usb_dc_ck); + clk_enable(priv->usb_host_ck); /* guesstimate for T5 == 1x 32K clock + APLL lock time */ udelay(100); } else { - clk_disable(usb_host_ck); - clk_disable(usb_dc_ck); + clk_disable(priv->usb_host_ck); + clk_disable(priv->usb_dc_ck); } } @@ -92,22 +83,22 @@ static void omap_ohci_clock_power(int on) * Board specific gang-switched transceiver power on/off. * NOTE: OSK supplies power from DC, not battery. */ -static int omap_ohci_transceiver_power(int on) +static int omap_ohci_transceiver_power(struct ohci_omap_priv *priv, int on) { if (on) { if (machine_is_omap_innovator() && cpu_is_omap1510()) __raw_writeb(__raw_readb(INNOVATOR_FPGA_CAM_USB_CONTROL) | ((1 << 5/*usb1*/) | (1 << 3/*usb2*/)), INNOVATOR_FPGA_CAM_USB_CONTROL); - else if (machine_is_omap_osk()) - tps65010_set_gpio_out_value(GPIO1, LOW); + else if (priv->power) + gpiod_set_value(priv->power, 0); } else { if (machine_is_omap_innovator() && cpu_is_omap1510()) __raw_writeb(__raw_readb(INNOVATOR_FPGA_CAM_USB_CONTROL) & ~((1 << 5/*usb1*/) | (1 << 3/*usb2*/)), INNOVATOR_FPGA_CAM_USB_CONTROL); - else if (machine_is_omap_osk()) - tps65010_set_gpio_out_value(GPIO1, HIGH); + else if (priv->power) + gpiod_set_value(priv->power, 1); } return 0; @@ -196,6 +187,7 @@ static int ohci_omap_reset(struct usb_hcd *hcd) { struct ohci_hcd *ohci = hcd_to_ohci(hcd); struct omap_usb_config *config = dev_get_platdata(hcd->self.controller); + struct ohci_omap_priv *priv = hcd_to_ohci_omap_priv(hcd); int need_transceiver = (config->otg != 0); int ret; @@ -235,7 +227,7 @@ static int ohci_omap_reset(struct usb_hcd *hcd) } #endif - omap_ohci_clock_power(1); + omap_ohci_clock_power(priv, 1); if (cpu_is_omap15xx()) { omap_1510_local_bus_power(1); @@ -266,8 +258,6 @@ static int ohci_omap_reset(struct usb_hcd *hcd) /* gpio9 for overcurrent detction */ omap_cfg_reg(W8_1610_GPIO9); - gpio_request(9, "OHCI overcurrent"); - gpio_direction_input(9); /* for paranoia's sake: disable USB.PUEN */ omap_cfg_reg(W4_USB_HIGHZ); @@ -281,7 +271,7 @@ static int ohci_omap_reset(struct usb_hcd *hcd) } /* FIXME hub_wq hub requests should manage power switching */ - omap_ohci_transceiver_power(1); + omap_ohci_transceiver_power(priv, 1); /* board init will have already handled HMC and mux setup. * any external transceiver should already be initialized @@ -305,6 +295,7 @@ static int ohci_hcd_omap_probe(struct platform_device *pdev) { int retval, irq; struct usb_hcd *hcd = 0; + struct ohci_omap_priv *priv; if (pdev->num_resources != 2) { dev_err(&pdev->dev, "invalid num_resources: %i\n", @@ -318,34 +309,58 @@ static int ohci_hcd_omap_probe(struct platform_device *pdev) return -ENODEV; } - usb_host_ck = clk_get(&pdev->dev, "usb_hhc_ck"); - if (IS_ERR(usb_host_ck)) - return PTR_ERR(usb_host_ck); + hcd = usb_create_hcd(&ohci_omap_hc_driver, &pdev->dev, + dev_name(&pdev->dev)); + if (!hcd) + return -ENOMEM; - if (!cpu_is_omap15xx()) - usb_dc_ck = clk_get(&pdev->dev, "usb_dc_ck"); - else - usb_dc_ck = clk_get(&pdev->dev, "lb_ck"); + hcd->rsrc_start = pdev->resource[0].start; + hcd->rsrc_len = pdev->resource[0].end - pdev->resource[0].start + 1; + priv = hcd_to_ohci_omap_priv(hcd); - if (IS_ERR(usb_dc_ck)) { - clk_put(usb_host_ck); - return PTR_ERR(usb_dc_ck); + /* Obtain two optional GPIO lines */ + priv->power = devm_gpiod_get_optional(&pdev->dev, "power", GPIOD_ASIS); + if (IS_ERR(priv->power)) { + retval = PTR_ERR(priv->power); + goto err_put_hcd; } + if (priv->power) + gpiod_set_consumer_name(priv->power, "OHCI power"); + /* + * This "overcurrent" GPIO line isn't really used in the code, + * but has a designated hardware function. + * TODO: implement proper overcurrent handling. + */ + priv->overcurrent = devm_gpiod_get_optional(&pdev->dev, "overcurrent", + GPIOD_IN); + if (IS_ERR(priv->overcurrent)) { + retval = PTR_ERR(priv->overcurrent); + goto err_put_hcd; + } + if (priv->overcurrent) + gpiod_set_consumer_name(priv->overcurrent, "OHCI overcurrent"); - hcd = usb_create_hcd(&ohci_omap_hc_driver, &pdev->dev, - dev_name(&pdev->dev)); - if (!hcd) { - retval = -ENOMEM; - goto err0; + priv->usb_host_ck = clk_get(&pdev->dev, "usb_hhc_ck"); + if (IS_ERR(priv->usb_host_ck)) { + retval = PTR_ERR(priv->usb_host_ck); + goto err_put_hcd; + } + + if (!cpu_is_omap15xx()) + priv->usb_dc_ck = clk_get(&pdev->dev, "usb_dc_ck"); + else + priv->usb_dc_ck = clk_get(&pdev->dev, "lb_ck"); + + if (IS_ERR(priv->usb_dc_ck)) { + retval = PTR_ERR(priv->usb_dc_ck); + goto err_put_host_ck; } - hcd->rsrc_start = pdev->resource[0].start; - hcd->rsrc_len = pdev->resource[0].end - pdev->resource[0].start + 1; if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len, hcd_name)) { dev_dbg(&pdev->dev, "request_mem_region failed\n"); retval = -EBUSY; - goto err1; + goto err_put_dc_ck; } hcd->regs = ioremap(hcd->rsrc_start, hcd->rsrc_len); @@ -370,11 +385,12 @@ err3: iounmap(hcd->regs); err2: release_mem_region(hcd->rsrc_start, hcd->rsrc_len); -err1: +err_put_dc_ck: + clk_put(priv->usb_dc_ck); +err_put_host_ck: + clk_put(priv->usb_host_ck); +err_put_hcd: usb_put_hcd(hcd); -err0: - clk_put(usb_dc_ck); - clk_put(usb_host_ck); return retval; } @@ -393,21 +409,20 @@ err0: static int ohci_hcd_omap_remove(struct platform_device *pdev) { struct usb_hcd *hcd = platform_get_drvdata(pdev); + struct ohci_omap_priv *priv = hcd_to_ohci_omap_priv(hcd); dev_dbg(hcd->self.controller, "stopping USB Controller\n"); usb_remove_hcd(hcd); - omap_ohci_clock_power(0); + omap_ohci_clock_power(priv, 0); if (!IS_ERR_OR_NULL(hcd->usb_phy)) { (void) otg_set_host(hcd->usb_phy->otg, 0); usb_put_phy(hcd->usb_phy); } - if (machine_is_omap_osk()) - gpio_free(9); iounmap(hcd->regs); release_mem_region(hcd->rsrc_start, hcd->rsrc_len); + clk_put(priv->usb_dc_ck); + clk_put(priv->usb_host_ck); usb_put_hcd(hcd); - clk_put(usb_dc_ck); - clk_put(usb_host_ck); return 0; } @@ -419,6 +434,7 @@ static int ohci_omap_suspend(struct platform_device *pdev, pm_message_t message) { struct usb_hcd *hcd = platform_get_drvdata(pdev); struct ohci_hcd *ohci = hcd_to_ohci(hcd); + struct ohci_omap_priv *priv = hcd_to_ohci_omap_priv(hcd); bool do_wakeup = device_may_wakeup(&pdev->dev); int ret; @@ -430,7 +446,7 @@ static int ohci_omap_suspend(struct platform_device *pdev, pm_message_t message) if (ret) return ret; - omap_ohci_clock_power(0); + omap_ohci_clock_power(priv, 0); return ret; } @@ -438,12 +454,13 @@ static int ohci_omap_resume(struct platform_device *dev) { struct usb_hcd *hcd = platform_get_drvdata(dev); struct ohci_hcd *ohci = hcd_to_ohci(hcd); + struct ohci_omap_priv *priv = hcd_to_ohci_omap_priv(hcd); if (time_before(jiffies, ohci->next_statechange)) msleep(5); ohci->next_statechange = jiffies; - omap_ohci_clock_power(1); + omap_ohci_clock_power(priv, 1); ohci_resume(hcd, false); return 0; } @@ -470,7 +487,8 @@ static struct platform_driver ohci_hcd_omap_driver = { static const struct ohci_driver_overrides omap_overrides __initconst = { .product_desc = "OMAP OHCI", - .reset = ohci_omap_reset + .reset = ohci_omap_reset, + .extra_priv_size = sizeof(struct ohci_omap_priv), }; static int __init ohci_omap_init(void) |