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0001 // SPDX-License-Identifier: GPL-2.0+
0002 /*
0003  * Setup platform devices needed by the Freescale multi-port host
0004  * and/or dual-role USB controller modules based on the description
0005  * in flat device tree.
0006  */
0007 
0008 #include <linux/kernel.h>
0009 #include <linux/platform_device.h>
0010 #include <linux/fsl_devices.h>
0011 #include <linux/err.h>
0012 #include <linux/io.h>
0013 #include <linux/of_platform.h>
0014 #include <linux/clk.h>
0015 #include <linux/module.h>
0016 #include <linux/dma-mapping.h>
0017 
0018 struct fsl_usb2_dev_data {
0019     char *dr_mode;      /* controller mode */
0020     char *drivers[3];   /* drivers to instantiate for this mode */
0021     enum fsl_usb2_operating_modes op_mode;  /* operating mode */
0022 };
0023 
0024 static struct fsl_usb2_dev_data dr_mode_data[] = {
0025     {
0026         .dr_mode = "host",
0027         .drivers = { "fsl-ehci", NULL, NULL, },
0028         .op_mode = FSL_USB2_DR_HOST,
0029     },
0030     {
0031         .dr_mode = "otg",
0032         .drivers = { "fsl-usb2-otg", "fsl-ehci", "fsl-usb2-udc", },
0033         .op_mode = FSL_USB2_DR_OTG,
0034     },
0035     {
0036         .dr_mode = "peripheral",
0037         .drivers = { "fsl-usb2-udc", NULL, NULL, },
0038         .op_mode = FSL_USB2_DR_DEVICE,
0039     },
0040 };
0041 
0042 static struct fsl_usb2_dev_data *get_dr_mode_data(struct device_node *np)
0043 {
0044     const unsigned char *prop;
0045     int i;
0046 
0047     prop = of_get_property(np, "dr_mode", NULL);
0048     if (prop) {
0049         for (i = 0; i < ARRAY_SIZE(dr_mode_data); i++) {
0050             if (!strcmp(prop, dr_mode_data[i].dr_mode))
0051                 return &dr_mode_data[i];
0052         }
0053     }
0054     pr_warn("%pOF: Invalid 'dr_mode' property, fallback to host mode\n",
0055         np);
0056     return &dr_mode_data[0]; /* mode not specified, use host */
0057 }
0058 
0059 static enum fsl_usb2_phy_modes determine_usb_phy(const char *phy_type)
0060 {
0061     if (!phy_type)
0062         return FSL_USB2_PHY_NONE;
0063     if (!strcasecmp(phy_type, "ulpi"))
0064         return FSL_USB2_PHY_ULPI;
0065     if (!strcasecmp(phy_type, "utmi"))
0066         return FSL_USB2_PHY_UTMI;
0067     if (!strcasecmp(phy_type, "utmi_wide"))
0068         return FSL_USB2_PHY_UTMI_WIDE;
0069     if (!strcasecmp(phy_type, "utmi_dual"))
0070         return FSL_USB2_PHY_UTMI_DUAL;
0071     if (!strcasecmp(phy_type, "serial"))
0072         return FSL_USB2_PHY_SERIAL;
0073 
0074     return FSL_USB2_PHY_NONE;
0075 }
0076 
0077 static struct platform_device *fsl_usb2_device_register(
0078                     struct platform_device *ofdev,
0079                     struct fsl_usb2_platform_data *pdata,
0080                     const char *name, int id)
0081 {
0082     struct platform_device *pdev;
0083     const struct resource *res = ofdev->resource;
0084     unsigned int num = ofdev->num_resources;
0085     int retval;
0086 
0087     pdev = platform_device_alloc(name, id);
0088     if (!pdev) {
0089         retval = -ENOMEM;
0090         goto error;
0091     }
0092 
0093     pdev->dev.parent = &ofdev->dev;
0094 
0095     pdev->dev.coherent_dma_mask = ofdev->dev.coherent_dma_mask;
0096 
0097     if (!pdev->dev.dma_mask) {
0098         pdev->dev.dma_mask = &ofdev->dev.coherent_dma_mask;
0099     } else {
0100         retval = dma_set_mask(&pdev->dev, DMA_BIT_MASK(32));
0101         if (retval)
0102             goto error;
0103     }
0104 
0105     retval = platform_device_add_data(pdev, pdata, sizeof(*pdata));
0106     if (retval)
0107         goto error;
0108 
0109     if (num) {
0110         retval = platform_device_add_resources(pdev, res, num);
0111         if (retval)
0112             goto error;
0113     }
0114 
0115     pdev->dev.of_node = ofdev->dev.of_node;
0116     pdev->dev.of_node_reused = true;
0117 
0118     retval = platform_device_add(pdev);
0119     if (retval)
0120         goto error;
0121 
0122     return pdev;
0123 
0124 error:
0125     platform_device_put(pdev);
0126     return ERR_PTR(retval);
0127 }
0128 
0129 static const struct of_device_id fsl_usb2_mph_dr_of_match[];
0130 
0131 static enum fsl_usb2_controller_ver usb_get_ver_info(struct device_node *np)
0132 {
0133     enum fsl_usb2_controller_ver ver = FSL_USB_VER_NONE;
0134 
0135     /*
0136      * returns 1 for usb controller version 1.6
0137      * returns 2 for usb controller version 2.2
0138      * returns 3 for usb controller version 2.4
0139      * returns 4 for usb controller version 2.5
0140      * returns 0 otherwise
0141      */
0142     if (of_device_is_compatible(np, "fsl-usb2-dr")) {
0143         if (of_device_is_compatible(np, "fsl-usb2-dr-v1.6"))
0144             ver = FSL_USB_VER_1_6;
0145         else if (of_device_is_compatible(np, "fsl-usb2-dr-v2.2"))
0146             ver = FSL_USB_VER_2_2;
0147         else if (of_device_is_compatible(np, "fsl-usb2-dr-v2.4"))
0148             ver = FSL_USB_VER_2_4;
0149         else if (of_device_is_compatible(np, "fsl-usb2-dr-v2.5"))
0150             ver = FSL_USB_VER_2_5;
0151         else /* for previous controller versions */
0152             ver = FSL_USB_VER_OLD;
0153 
0154         if (ver > FSL_USB_VER_NONE)
0155             return ver;
0156     }
0157 
0158     if (of_device_is_compatible(np, "fsl,mpc5121-usb2-dr"))
0159         return FSL_USB_VER_OLD;
0160 
0161     if (of_device_is_compatible(np, "fsl-usb2-mph")) {
0162         if (of_device_is_compatible(np, "fsl-usb2-mph-v1.6"))
0163             ver = FSL_USB_VER_1_6;
0164         else if (of_device_is_compatible(np, "fsl-usb2-mph-v2.2"))
0165             ver = FSL_USB_VER_2_2;
0166         else if (of_device_is_compatible(np, "fsl-usb2-mph-v2.4"))
0167             ver = FSL_USB_VER_2_4;
0168         else if (of_device_is_compatible(np, "fsl-usb2-mph-v2.5"))
0169             ver = FSL_USB_VER_2_5;
0170         else /* for previous controller versions */
0171             ver = FSL_USB_VER_OLD;
0172     }
0173 
0174     return ver;
0175 }
0176 
0177 static int fsl_usb2_mph_dr_of_probe(struct platform_device *ofdev)
0178 {
0179     struct device_node *np = ofdev->dev.of_node;
0180     struct platform_device *usb_dev;
0181     struct fsl_usb2_platform_data data, *pdata;
0182     struct fsl_usb2_dev_data *dev_data;
0183     const struct of_device_id *match;
0184     const unsigned char *prop;
0185     static unsigned int idx;
0186     int i;
0187 
0188     if (!of_device_is_available(np))
0189         return -ENODEV;
0190 
0191     match = of_match_device(fsl_usb2_mph_dr_of_match, &ofdev->dev);
0192     if (!match)
0193         return -ENODEV;
0194 
0195     pdata = &data;
0196     if (match->data)
0197         memcpy(pdata, match->data, sizeof(data));
0198     else
0199         memset(pdata, 0, sizeof(data));
0200 
0201     dev_data = get_dr_mode_data(np);
0202 
0203     if (of_device_is_compatible(np, "fsl-usb2-mph")) {
0204         if (of_get_property(np, "port0", NULL))
0205             pdata->port_enables |= FSL_USB2_PORT0_ENABLED;
0206 
0207         if (of_get_property(np, "port1", NULL))
0208             pdata->port_enables |= FSL_USB2_PORT1_ENABLED;
0209 
0210         pdata->operating_mode = FSL_USB2_MPH_HOST;
0211     } else {
0212         if (of_get_property(np, "fsl,invert-drvvbus", NULL))
0213             pdata->invert_drvvbus = 1;
0214 
0215         if (of_get_property(np, "fsl,invert-pwr-fault", NULL))
0216             pdata->invert_pwr_fault = 1;
0217 
0218         /* setup mode selected in the device tree */
0219         pdata->operating_mode = dev_data->op_mode;
0220     }
0221 
0222     prop = of_get_property(np, "phy_type", NULL);
0223     pdata->phy_mode = determine_usb_phy(prop);
0224     pdata->controller_ver = usb_get_ver_info(np);
0225 
0226     /* Activate Erratum by reading property in device tree */
0227     pdata->has_fsl_erratum_a007792 =
0228         of_property_read_bool(np, "fsl,usb-erratum-a007792");
0229     pdata->has_fsl_erratum_a005275 =
0230         of_property_read_bool(np, "fsl,usb-erratum-a005275");
0231     pdata->has_fsl_erratum_a005697 =
0232         of_property_read_bool(np, "fsl,usb_erratum-a005697");
0233     pdata->has_fsl_erratum_a006918 =
0234         of_property_read_bool(np, "fsl,usb_erratum-a006918");
0235     pdata->has_fsl_erratum_14 =
0236         of_property_read_bool(np, "fsl,usb_erratum-14");
0237 
0238     /*
0239      * Determine whether phy_clk_valid needs to be checked
0240      * by reading property in device tree
0241      */
0242     pdata->check_phy_clk_valid =
0243         of_property_read_bool(np, "phy-clk-valid");
0244 
0245     if (pdata->have_sysif_regs) {
0246         if (pdata->controller_ver == FSL_USB_VER_NONE) {
0247             dev_warn(&ofdev->dev, "Could not get controller version\n");
0248             return -ENODEV;
0249         }
0250     }
0251 
0252     for (i = 0; i < ARRAY_SIZE(dev_data->drivers); i++) {
0253         if (!dev_data->drivers[i])
0254             continue;
0255         usb_dev = fsl_usb2_device_register(ofdev, pdata,
0256                     dev_data->drivers[i], idx);
0257         if (IS_ERR(usb_dev)) {
0258             dev_err(&ofdev->dev, "Can't register usb device\n");
0259             return PTR_ERR(usb_dev);
0260         }
0261     }
0262     idx++;
0263     return 0;
0264 }
0265 
0266 static int __unregister_subdev(struct device *dev, void *d)
0267 {
0268     platform_device_unregister(to_platform_device(dev));
0269     return 0;
0270 }
0271 
0272 static int fsl_usb2_mph_dr_of_remove(struct platform_device *ofdev)
0273 {
0274     device_for_each_child(&ofdev->dev, NULL, __unregister_subdev);
0275     return 0;
0276 }
0277 
0278 #ifdef CONFIG_PPC_MPC512x
0279 
0280 #define USBGENCTRL      0x200       /* NOTE: big endian */
0281 #define GC_WU_INT_CLR       (1 << 5)    /* Wakeup int clear */
0282 #define GC_ULPI_SEL     (1 << 4)    /* ULPI i/f select (usb0 only)*/
0283 #define GC_PPP          (1 << 3)    /* Inv. Port Power Polarity */
0284 #define GC_PFP          (1 << 2)    /* Inv. Power Fault Polarity */
0285 #define GC_WU_ULPI_EN       (1 << 1)    /* Wakeup on ULPI event */
0286 #define GC_WU_IE        (1 << 1)    /* Wakeup interrupt enable */
0287 
0288 #define ISIPHYCTRL      0x204       /* NOTE: big endian */
0289 #define PHYCTRL_PHYE        (1 << 4)    /* On-chip UTMI PHY enable */
0290 #define PHYCTRL_BSENH       (1 << 3)    /* Bit Stuff Enable High */
0291 #define PHYCTRL_BSEN        (1 << 2)    /* Bit Stuff Enable */
0292 #define PHYCTRL_LSFE        (1 << 1)    /* Line State Filter Enable */
0293 #define PHYCTRL_PXE     (1 << 0)    /* PHY oscillator enable */
0294 
0295 int fsl_usb2_mpc5121_init(struct platform_device *pdev)
0296 {
0297     struct fsl_usb2_platform_data *pdata = dev_get_platdata(&pdev->dev);
0298     struct clk *clk;
0299     int err;
0300 
0301     clk = devm_clk_get(pdev->dev.parent, "ipg");
0302     if (IS_ERR(clk)) {
0303         dev_err(&pdev->dev, "failed to get clk\n");
0304         return PTR_ERR(clk);
0305     }
0306     err = clk_prepare_enable(clk);
0307     if (err) {
0308         dev_err(&pdev->dev, "failed to enable clk\n");
0309         return err;
0310     }
0311     pdata->clk = clk;
0312 
0313     if (pdata->phy_mode == FSL_USB2_PHY_UTMI_WIDE) {
0314         u32 reg = 0;
0315 
0316         if (pdata->invert_drvvbus)
0317             reg |= GC_PPP;
0318 
0319         if (pdata->invert_pwr_fault)
0320             reg |= GC_PFP;
0321 
0322         out_be32(pdata->regs + ISIPHYCTRL, PHYCTRL_PHYE | PHYCTRL_PXE);
0323         out_be32(pdata->regs + USBGENCTRL, reg);
0324     }
0325     return 0;
0326 }
0327 
0328 static void fsl_usb2_mpc5121_exit(struct platform_device *pdev)
0329 {
0330     struct fsl_usb2_platform_data *pdata = dev_get_platdata(&pdev->dev);
0331 
0332     pdata->regs = NULL;
0333 
0334     if (pdata->clk)
0335         clk_disable_unprepare(pdata->clk);
0336 }
0337 
0338 static struct fsl_usb2_platform_data fsl_usb2_mpc5121_pd = {
0339     .big_endian_desc = 1,
0340     .big_endian_mmio = 1,
0341     .es = 1,
0342     .have_sysif_regs = 0,
0343     .le_setup_buf = 1,
0344     .init = fsl_usb2_mpc5121_init,
0345     .exit = fsl_usb2_mpc5121_exit,
0346 };
0347 #endif /* CONFIG_PPC_MPC512x */
0348 
0349 static struct fsl_usb2_platform_data fsl_usb2_mpc8xxx_pd = {
0350     .have_sysif_regs = 1,
0351 };
0352 
0353 static const struct of_device_id fsl_usb2_mph_dr_of_match[] = {
0354     { .compatible = "fsl-usb2-mph", .data = &fsl_usb2_mpc8xxx_pd, },
0355     { .compatible = "fsl-usb2-dr", .data = &fsl_usb2_mpc8xxx_pd, },
0356 #ifdef CONFIG_PPC_MPC512x
0357     { .compatible = "fsl,mpc5121-usb2-dr", .data = &fsl_usb2_mpc5121_pd, },
0358 #endif
0359     {},
0360 };
0361 MODULE_DEVICE_TABLE(of, fsl_usb2_mph_dr_of_match);
0362 
0363 static struct platform_driver fsl_usb2_mph_dr_driver = {
0364     .driver = {
0365         .name = "fsl-usb2-mph-dr",
0366         .of_match_table = fsl_usb2_mph_dr_of_match,
0367     },
0368     .probe  = fsl_usb2_mph_dr_of_probe,
0369     .remove = fsl_usb2_mph_dr_of_remove,
0370 };
0371 
0372 module_platform_driver(fsl_usb2_mph_dr_driver);
0373 
0374 MODULE_DESCRIPTION("FSL MPH DR OF devices driver");
0375 MODULE_AUTHOR("Anatolij Gustschin <agust@denx.de>");
0376 MODULE_LICENSE("GPL");
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