usb-phy = <&usb_otg>;
};
+USB PHY with optional OTG:
+
+Required properties:
+- compatible: Should contain:
+ "qcom,usb-otg-ci" for chipsets with ChipIdea 45nm PHY
+ "qcom,usb-otg-snps" for chipsets with Synopsys 28nm PHY
+
+- regs: Offset and length of the register set in the memory map
+- interrupts: interrupt-specifier for the OTG interrupt.
+
+- clocks: A list of phandle + clock-specifier pairs for the
+ clocks listed in clock-names
+- clock-names: Should contain the following:
+ "phy" USB PHY reference clock
+ "core" Protocol engine clock
+ "iface" Interface bus clock
+ "alt_core" Protocol engine clock for targets with asynchronous
+ reset methodology. (optional)
+
+- vdccx-supply: phandle to the regulator for the vdd supply for
+ digital circuit operation.
+- v1p8-supply: phandle to the regulator for the 1.8V supply
+- v3p3-supply: phandle to the regulator for the 3.3V supply
+
+- resets: A list of phandle + reset-specifier pairs for the
+ resets listed in reset-names
+- reset-names: Should contain the following:
+ "phy" USB PHY controller reset
+ "link" USB LINK controller reset
+
+- qcom,otg-control: OTG control (VBUS and ID notifications) can be one of
+ 1 - PHY control
+ 2 - PMIC control
+
+Optional properties:
+- dr_mode: One of "host", "peripheral" or "otg". Defaults to "otg"
+
+- qcom,phy-init-sequence: PHY configuration sequence values. This is related to Device
+ Mode Eye Diagram test. Start address at which these values will be
+ written is ULPI_EXT_VENDOR_SPECIFIC. Value of -1 is reserved as
+ "do not overwrite default value at this address".
+ For example: qcom,phy-init-sequence = < -1 0x63 >;
+ Will update only value at address ULPI_EXT_VENDOR_SPECIFIC + 1.
+
+Example HSUSB OTG controller device node:
+
+ usb@f9a55000 {
+ compatible = "qcom,usb-otg-snps";
+ reg = <0xf9a55000 0x400>;
+ interrupts = <0 134 0>;
+ dr_mode = "peripheral";
+
+ clocks = <&gcc GCC_XO_CLK>, <&gcc GCC_USB_HS_SYSTEM_CLK>,
+ <&gcc GCC_USB_HS_AHB_CLK>;
+
+ clock-names = "phy", "core", "iface";
+
+ vddcx-supply = <&pm8841_s2_corner>;
+ v1p8-supply = <&pm8941_l6>;
+ v3p3-supply = <&pm8941_l24>;
+
+ resets = <&gcc GCC_USB2A_PHY_BCR>, <&gcc GCC_USB_HS_BCR>;
+ reset-names = "phy", "link";
+
+ qcom,otg-control = <1>;
+ qcom,phy-init-sequence = < -1 0x63 >;
+ };
#include <linux/debugfs.h>
#include <linux/seq_file.h>
#include <linux/pm_runtime.h>
+#include <linux/of.h>
+#include <linux/of_device.h>
#include <linux/usb.h>
#include <linux/usb/otg.h>
+#include <linux/usb/of.h>
#include <linux/usb/ulpi.h>
#include <linux/usb/gadget.h>
#include <linux/usb/hcd.h>
static void ulpi_init(struct msm_otg *motg)
{
struct msm_otg_platform_data *pdata = motg->pdata;
- int *seq = pdata->phy_init_seq;
+ int *seq = pdata->phy_init_seq, idx;
+ u32 addr = ULPI_EXT_VENDOR_SPECIFIC;
- if (!seq)
- return;
+ for (idx = 0; idx < pdata->phy_init_sz; idx++) {
+ if (seq[idx] == -1)
+ continue;
- while (seq[0] >= 0) {
dev_vdbg(motg->phy.dev, "ulpi: write 0x%02x to 0x%02x\n",
- seq[0], seq[1]);
- ulpi_write(&motg->phy, seq[0], seq[1]);
- seq += 2;
+ seq[idx], addr + idx);
+ ulpi_write(&motg->phy, seq[idx], addr + idx);
}
}
debugfs_remove(msm_otg_dbg_root);
}
+static struct of_device_id msm_otg_dt_match[] = {
+ {
+ .compatible = "qcom,usb-otg-ci",
+ .data = (void *) CI_45NM_INTEGRATED_PHY
+ },
+ {
+ .compatible = "qcom,usb-otg-snps",
+ .data = (void *) SNPS_28NM_INTEGRATED_PHY
+ },
+ { }
+};
+MODULE_DEVICE_TABLE(of, msm_otg_dt_match);
+
+static int msm_otg_read_dt(struct platform_device *pdev, struct msm_otg *motg)
+{
+ struct msm_otg_platform_data *pdata;
+ const struct of_device_id *id;
+ struct device_node *node = pdev->dev.of_node;
+ struct property *prop;
+ int len, ret, words;
+ u32 val;
+
+ pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL);
+ if (!pdata)
+ return -ENOMEM;
+
+ motg->pdata = pdata;
+
+ id = of_match_device(msm_otg_dt_match, &pdev->dev);
+ pdata->phy_type = (int) id->data;
+
+ pdata->mode = of_usb_get_dr_mode(node);
+ if (pdata->mode == USB_DR_MODE_UNKNOWN)
+ pdata->mode = USB_DR_MODE_OTG;
+
+ pdata->otg_control = OTG_PHY_CONTROL;
+ if (!of_property_read_u32(node, "qcom,otg-control", &val))
+ if (val == OTG_PMIC_CONTROL)
+ pdata->otg_control = val;
+
+ prop = of_find_property(node, "qcom,phy-init-sequence", &len);
+ if (!prop || !len)
+ return 0;
+
+ words = len / sizeof(u32);
+
+ if (words >= ULPI_EXT_VENDOR_SPECIFIC) {
+ dev_warn(&pdev->dev, "Too big PHY init sequence %d\n", words);
+ return 0;
+ }
+
+ pdata->phy_init_seq = devm_kzalloc(&pdev->dev, len, GFP_KERNEL);
+ if (!pdata->phy_init_seq) {
+ dev_warn(&pdev->dev, "No space for PHY init sequence\n");
+ return 0;
+ }
+
+ ret = of_property_read_u32_array(node, "qcom,phy-init-sequence",
+ pdata->phy_init_seq, words);
+ if (!ret)
+ pdata->phy_init_sz = words;
+
+ return 0;
+}
+
static int msm_otg_probe(struct platform_device *pdev)
{
struct regulator_bulk_data regs[3];
int ret = 0;
+ struct device_node *np = pdev->dev.of_node;
+ struct msm_otg_platform_data *pdata;
struct resource *res;
struct msm_otg *motg;
struct usb_phy *phy;
- dev_info(&pdev->dev, "msm_otg probe\n");
- if (!dev_get_platdata(&pdev->dev)) {
- dev_err(&pdev->dev, "No platform data given. Bailing out\n");
- return -ENODEV;
- }
-
motg = devm_kzalloc(&pdev->dev, sizeof(struct msm_otg), GFP_KERNEL);
if (!motg) {
dev_err(&pdev->dev, "unable to allocate msm_otg\n");
return -ENOMEM;
}
+ pdata = dev_get_platdata(&pdev->dev);
+ if (!pdata) {
+ if (!np)
+ return -ENXIO;
+ ret = msm_otg_read_dt(pdev, motg);
+ if (ret)
+ return ret;
+ }
+
motg->phy.otg = devm_kzalloc(&pdev->dev, sizeof(struct usb_otg),
GFP_KERNEL);
if (!motg->phy.otg) {
return -ENOMEM;
}
- motg->pdata = dev_get_platdata(&pdev->dev);
phy = &motg->phy;
phy->dev = &pdev->dev;
- motg->phy_reset_clk = devm_clk_get(&pdev->dev, "usb_phy_clk");
+ motg->phy_reset_clk = devm_clk_get(&pdev->dev,
+ np ? "phy" : "usb_phy_clk");
if (IS_ERR(motg->phy_reset_clk)) {
dev_err(&pdev->dev, "failed to get usb_phy_clk\n");
return PTR_ERR(motg->phy_reset_clk);
}
- motg->clk = devm_clk_get(&pdev->dev, "usb_hs_clk");
+ motg->clk = devm_clk_get(&pdev->dev, np ? "core" : "usb_hs_clk");
if (IS_ERR(motg->clk)) {
dev_err(&pdev->dev, "failed to get usb_hs_clk\n");
return PTR_ERR(motg->clk);
* operation and USB core cannot tolerate frequency changes on
* CORE CLK.
*/
- motg->pclk = devm_clk_get(&pdev->dev, "usb_hs_pclk");
+ motg->pclk = devm_clk_get(&pdev->dev, np ? "iface" : "usb_hs_pclk");
if (IS_ERR(motg->pclk)) {
dev_err(&pdev->dev, "failed to get usb_hs_pclk\n");
return PTR_ERR(motg->pclk);
* clock is introduced to remove the dependency on AXI
* bus frequency.
*/
- motg->core_clk = devm_clk_get(&pdev->dev, "usb_hs_core_clk");
+ motg->core_clk = devm_clk_get(&pdev->dev,
+ np ? "alt_core" : "usb_hs_core_clk");
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
motg->regs = devm_ioremap(&pdev->dev, res->start, resource_size(res));
device_init_wakeup(&pdev->dev, 1);
if (motg->pdata->mode == USB_DR_MODE_OTG &&
- motg->pdata->otg_control == OTG_USER_CONTROL) {
+ motg->pdata->otg_control == OTG_USER_CONTROL) {
ret = msm_otg_debugfs_init(motg);
if (ret)
dev_dbg(&pdev->dev, "Can not create mode change file\n");
.name = DRIVER_NAME,
.owner = THIS_MODULE,
.pm = &msm_otg_dev_pm_ops,
+ .of_match_table = msm_otg_dt_match,
},
};
projects / karo-tx-linux.git / commitdiff