summaryrefslogtreecommitdiff
path: root/drivers/usb
diff options
context:
space:
mode:
authorAdam Ford <aford173@gmail.com>2019-04-30 05:21:41 -0500
committerTom Rini <trini@konsulko.com>2019-05-05 08:48:50 -0400
commit9da5474389c784474274d8e1d1d04fab924d3c39 (patch)
treec6e7e81df130100099d1d23297692e10450f0754 /drivers/usb
parent53290e6efdc10b5a40955fa4c5b0960651180bf2 (diff)
usb: ohci: ohci-da8xx: Enable da850-ohci driver with DM support
This patch reuses some former code for the hawkboard, combines it with some some similar DM_USB compatible code for the OHCI driver, and enables the use of the da850's OHCI controller with DM_USB compatibility. Signed-off-by: Adam Ford <aford173@gmail.com>
Diffstat (limited to 'drivers/usb')
-rw-r--r--drivers/usb/host/Kconfig5
-rw-r--r--drivers/usb/host/ohci-da8xx.c138
2 files changed, 142 insertions, 1 deletions
diff --git a/drivers/usb/host/Kconfig b/drivers/usb/host/Kconfig
index 1c2212f547..b1188bcbf5 100644
--- a/drivers/usb/host/Kconfig
+++ b/drivers/usb/host/Kconfig
@@ -246,6 +246,11 @@ config USB_OHCI_GENERIC
---help---
Enables support for generic OHCI controller.
+config USB_OHCI_DA8XX
+ bool "Support for da850 OHCI USB controller"
+ help
+ Enable support for the da850 USB controller.
+
endif # USB_OHCI_HCD
config USB_UHCI_HCD
diff --git a/drivers/usb/host/ohci-da8xx.c b/drivers/usb/host/ohci-da8xx.c
index 47ad3f34d5..e8a495fde5 100644
--- a/drivers/usb/host/ohci-da8xx.c
+++ b/drivers/usb/host/ohci-da8xx.c
@@ -4,9 +4,54 @@
*/
#include <common.h>
-
+#include <asm/io.h>
+#include <clk.h>
+#include <dm.h>
+#include <dm/ofnode.h>
+#include <generic-phy.h>
+#include <reset.h>
+#include "ohci.h"
#include <asm/arch/da8xx-usb.h>
+struct da8xx_ohci {
+ ohci_t ohci;
+ struct clk *clocks; /* clock list */
+ struct phy phy;
+ int clock_count; /* number of clock in clock list */
+};
+
+static int usb_phy_on(void)
+{
+ unsigned long timeout;
+
+ clrsetbits_le32(&davinci_syscfg_regs->cfgchip2,
+ (CFGCHIP2_RESET | CFGCHIP2_PHYPWRDN |
+ CFGCHIP2_OTGPWRDN | CFGCHIP2_OTGMODE |
+ CFGCHIP2_REFFREQ | CFGCHIP2_USB1PHYCLKMUX),
+ (CFGCHIP2_SESENDEN | CFGCHIP2_VBDTCTEN |
+ CFGCHIP2_PHY_PLLON | CFGCHIP2_REFFREQ_24MHZ |
+ CFGCHIP2_USB2PHYCLKMUX | CFGCHIP2_USB1SUSPENDM));
+
+ /* wait until the usb phy pll locks */
+ timeout = get_timer(0);
+ while (get_timer(timeout) < 10) {
+ if (readl(&davinci_syscfg_regs->cfgchip2) & CFGCHIP2_PHYCLKGD)
+ return 1;
+ }
+
+ /* USB phy was not turned on */
+ return 0;
+}
+
+static void usb_phy_off(void)
+{
+ /* Power down the on-chip PHY. */
+ clrsetbits_le32(&davinci_syscfg_regs->cfgchip2,
+ CFGCHIP2_PHY_PLLON | CFGCHIP2_USB1SUSPENDM,
+ CFGCHIP2_PHYPWRDN | CFGCHIP2_OTGPWRDN |
+ CFGCHIP2_RESET);
+}
+
int usb_cpu_init(void)
{
/* enable psc for usb2.0 */
@@ -37,3 +82,94 @@ int usb_cpu_init_fail(void)
{
return usb_cpu_stop();
}
+
+#if CONFIG_IS_ENABLED(DM_USB)
+static int ohci_da8xx_probe(struct udevice *dev)
+{
+ struct ohci_regs *regs = (struct ohci_regs *)devfdt_get_addr(dev);
+ struct da8xx_ohci *priv = dev_get_priv(dev);
+ int i, err, ret, clock_nb;
+
+ err = 0;
+ priv->clock_count = 0;
+ clock_nb = dev_count_phandle_with_args(dev, "clocks", "#clock-cells");
+ if (clock_nb > 0) {
+ priv->clocks = devm_kcalloc(dev, clock_nb, sizeof(struct clk),
+ GFP_KERNEL);
+ if (!priv->clocks)
+ return -ENOMEM;
+
+ for (i = 0; i < clock_nb; i++) {
+ err = clk_get_by_index(dev, i, &priv->clocks[i]);
+ if (err < 0)
+ break;
+
+ err = clk_enable(&priv->clocks[i]);
+ if (err) {
+ dev_err(dev, "failed to enable clock %d\n", i);
+ clk_free(&priv->clocks[i]);
+ goto clk_err;
+ }
+ priv->clock_count++;
+ }
+ } else if (clock_nb != -ENOENT) {
+ dev_err(dev, "failed to get clock phandle(%d)\n", clock_nb);
+ return clock_nb;
+ }
+
+ err = usb_cpu_init();
+
+ if (err)
+ goto clk_err;
+
+ err = ohci_register(dev, regs);
+ if (err)
+ goto phy_err;
+
+ return 0;
+
+phy_err:
+ ret = usb_cpu_stop();
+ if (ret)
+ dev_err(dev, "failed to shutdown usb phy\n");
+
+clk_err:
+ ret = clk_release_all(priv->clocks, priv->clock_count);
+ if (ret)
+ dev_err(dev, "failed to disable all clocks\n");
+
+ return err;
+}
+
+static int ohci_da8xx_remove(struct udevice *dev)
+{
+ struct da8xx_ohci *priv = dev_get_priv(dev);
+ int ret;
+
+ ret = ohci_deregister(dev);
+ if (ret)
+ return ret;
+
+ ret = usb_cpu_stop();
+ if (ret)
+ return ret;
+
+ return clk_release_all(priv->clocks, priv->clock_count);
+}
+
+static const struct udevice_id da8xx_ohci_ids[] = {
+ { .compatible = "ti,da830-ohci" },
+ { }
+};
+
+U_BOOT_DRIVER(ohci_generic) = {
+ .name = "ohci-da8xx",
+ .id = UCLASS_USB,
+ .of_match = da8xx_ohci_ids,
+ .probe = ohci_da8xx_probe,
+ .remove = ohci_da8xx_remove,
+ .ops = &ohci_usb_ops,
+ .priv_auto_alloc_size = sizeof(struct da8xx_ohci),
+ .flags = DM_FLAG_ALLOC_PRIV_DMA,
+};
+#endif