usb: gadget: udc: atmel: Don't use DT to configure end point

The endpoint configuration used to be stored in the device tree,
however the configuration depend on the "version" of the controller
itself.

This information is already documented by the compatible string. It
then possible to just rely on the compatible string and completely
remove the full ep configuration done in the device tree as it was
already the case for all the other USB device controller.

Acked-by: Cristian Birsan <cristian.birsan@microchip.com>
Signed-off-by: Gregory CLEMENT <gregory.clement@bootlin.com>
Signed-off-by: Felipe Balbi <balbi@kernel.org>

diff --git a/drivers/usb/gadget/udc/atmel_usba_udc.c b/drivers/usb/gadget/udc/atmel_usba_udc.c
index 22200341c8ec3a93f73d0132187616b98519a79b..05998dd92bc8bc5a35e21d5d7015fc56da88d2a1 100644 (file)
--- a/drivers/usb/gadget/udc/atmel_usba_udc.c
+++ b/drivers/usb/gadget/udc/atmel_usba_udc.c
@@ -2043,10 +2043,56 @@ static const struct usba_udc_errata at91sam9g45_errata = {
        .pulse_bias = at91sam9g45_pulse_bias,
 };
 
+static const struct usba_ep_config ep_config_sam9[] __initconst = {
+       { .nr_banks = 1 },                              /* ep 0 */
+       { .nr_banks = 2, .can_dma = 1, .can_isoc = 1 }, /* ep 1 */
+       { .nr_banks = 2, .can_dma = 1, .can_isoc = 1 }, /* ep 2 */
+       { .nr_banks = 3, .can_dma = 1 },                /* ep 3 */
+       { .nr_banks = 3, .can_dma = 1 },                /* ep 4 */
+       { .nr_banks = 3, .can_dma = 1, .can_isoc = 1 }, /* ep 5 */
+       { .nr_banks = 3, .can_dma = 1, .can_isoc = 1 }, /* ep 6 */
+};
+
+static const struct usba_ep_config ep_config_sama5[] __initconst = {
+       { .nr_banks = 1 },                              /* ep 0 */
+       { .nr_banks = 3, .can_dma = 1, .can_isoc = 1 }, /* ep 1 */
+       { .nr_banks = 3, .can_dma = 1, .can_isoc = 1 }, /* ep 2 */
+       { .nr_banks = 2, .can_dma = 1, .can_isoc = 1 }, /* ep 3 */
+       { .nr_banks = 2, .can_dma = 1, .can_isoc = 1 }, /* ep 4 */
+       { .nr_banks = 2, .can_dma = 1, .can_isoc = 1 }, /* ep 5 */
+       { .nr_banks = 2, .can_dma = 1, .can_isoc = 1 }, /* ep 6 */
+       { .nr_banks = 2, .can_dma = 1, .can_isoc = 1 }, /* ep 7 */
+       { .nr_banks = 2, .can_isoc = 1 },               /* ep 8 */
+       { .nr_banks = 2, .can_isoc = 1 },               /* ep 9 */
+       { .nr_banks = 2, .can_isoc = 1 },               /* ep 10 */
+       { .nr_banks = 2, .can_isoc = 1 },               /* ep 11 */
+       { .nr_banks = 2, .can_isoc = 1 },               /* ep 12 */
+       { .nr_banks = 2, .can_isoc = 1 },               /* ep 13 */
+       { .nr_banks = 2, .can_isoc = 1 },               /* ep 14 */
+       { .nr_banks = 2, .can_isoc = 1 },               /* ep 15 */
+};
+
+static const struct usba_udc_config udc_at91sam9rl_cfg = {
+       .errata = &at91sam9rl_errata,
+       .config = ep_config_sam9,
+       .num_ep = ARRAY_SIZE(ep_config_sam9),
+};
+
+static const struct usba_udc_config udc_at91sam9g45_cfg = {
+       .errata = &at91sam9g45_errata,
+       .config = ep_config_sam9,
+       .num_ep = ARRAY_SIZE(ep_config_sam9),
+};
+
+static const struct usba_udc_config udc_sama5d3_cfg = {
+       .config = ep_config_sama5,
+       .num_ep = ARRAY_SIZE(ep_config_sama5),
+};
+
 static const struct of_device_id atmel_udc_dt_ids[] = {
-       { .compatible = "atmel,at91sam9rl-udc", .data = &at91sam9rl_errata },
-       { .compatible = "atmel,at91sam9g45-udc", .data = &at91sam9g45_errata },
-       { .compatible = "atmel,sama5d3-udc" },
+       { .compatible = "atmel,at91sam9rl-udc", .data = &udc_at91sam9rl_cfg },
+       { .compatible = "atmel,at91sam9g45-udc", .data = &udc_at91sam9g45_cfg },
+       { .compatible = "atmel,sama5d3-udc", .data = &udc_sama5d3_cfg },
        { /* sentinel */ }
 };
 
@@ -2055,18 +2101,19 @@ MODULE_DEVICE_TABLE(of, atmel_udc_dt_ids);
 static struct usba_ep * atmel_udc_of_init(struct platform_device *pdev,
                                                    struct usba_udc *udc)
 {
-       u32 val;
        struct device_node *np = pdev->dev.of_node;
        const struct of_device_id *match;
        struct device_node *pp;
        int i, ret;
        struct usba_ep *eps, *ep;
+       const struct usba_udc_config *udc_config;
 
        match = of_match_node(atmel_udc_dt_ids, np);
        if (!match)
                return ERR_PTR(-EINVAL);
 
-       udc->errata = match->data;
+       udc_config = match->data;
+       udc->errata = udc_config->errata;
        udc->pmc = syscon_regmap_lookup_by_compatible("atmel,at91sam9g45-pmc");
        if (IS_ERR(udc->pmc))
                udc->pmc = syscon_regmap_lookup_by_compatible("atmel,at91sam9rl-pmc");
@@ -2082,8 +2129,7 @@ static struct usba_ep * atmel_udc_of_init(struct platform_device *pdev,
 
        if (fifo_mode == 0) {
                pp = NULL;
-               while ((pp = of_get_next_child(np, pp)))
-                       udc->num_ep++;
+               udc->num_ep = udc_config->num_ep;
                udc->configured_ep = 1;
        } else {
                udc->num_ep = usba_config_fifo_table(udc);
@@ -2100,52 +2146,38 @@ static struct usba_ep * atmel_udc_of_init(struct platform_device *pdev,
 
        pp = NULL;
        i = 0;
-       while ((pp = of_get_next_child(np, pp)) && i < udc->num_ep) {
+       while (i < udc->num_ep) {
+               const struct usba_ep_config *ep_cfg = &udc_config->config[i];
+
                ep = &eps[i];
 
-               ret = of_property_read_u32(pp, "reg", &val);
-               if (ret) {
-                       dev_err(&pdev->dev, "of_probe: reg error(%d)\n", ret);
-                       goto err;
-               }
-               ep->index = fifo_mode ? udc->fifo_cfg[i].hw_ep_num : val;
+               ep->index = fifo_mode ? udc->fifo_cfg[i].hw_ep_num : i;
+
+               /* Only the first EP is 64 bytes */
+               if (ep->index == 0)
+                       ep->fifo_size = 64;
+               else
+                       ep->fifo_size = 1024;
 
-               ret = of_property_read_u32(pp, "atmel,fifo-size", &val);
-               if (ret) {
-                       dev_err(&pdev->dev, "of_probe: fifo-size error(%d)\n", ret);
-                       goto err;
-               }
                if (fifo_mode) {
-                       if (val < udc->fifo_cfg[i].fifo_size) {
+                       if (ep->fifo_size < udc->fifo_cfg[i].fifo_size)
                                dev_warn(&pdev->dev,
-                                        "Using max fifo-size value from DT\n");
-                               ep->fifo_size = val;
-                       } else {
+                                        "Using default max fifo-size value\n");
+                       else
                                ep->fifo_size = udc->fifo_cfg[i].fifo_size;
-                       }
-               } else {
-                       ep->fifo_size = val;
                }
 
-               ret = of_property_read_u32(pp, "atmel,nb-banks", &val);
-               if (ret) {
-                       dev_err(&pdev->dev, "of_probe: nb-banks error(%d)\n", ret);
-                       goto err;
-               }
+               ep->nr_banks = ep_cfg->nr_banks;
                if (fifo_mode) {
-                       if (val < udc->fifo_cfg[i].nr_banks) {
+                       if (ep->nr_banks < udc->fifo_cfg[i].nr_banks)
                                dev_warn(&pdev->dev,
-                                        "Using max nb-banks value from DT\n");
-                               ep->nr_banks = val;
-                       } else {
+                                        "Using default max nb-banks value\n");
+                       else
                                ep->nr_banks = udc->fifo_cfg[i].nr_banks;
-                       }
-               } else {
-                       ep->nr_banks = val;
                }
 
-               ep->can_dma = of_property_read_bool(pp, "atmel,can-dma");
-               ep->can_isoc = of_property_read_bool(pp, "atmel,can-isoc");
+               ep->can_dma = ep_cfg->can_dma;
+               ep->can_isoc = ep_cfg->can_isoc;
 
                sprintf(ep->name, "ep%d", ep->index);
                ep->ep.name = ep->name;

diff --git a/drivers/usb/gadget/udc/atmel_usba_udc.h b/drivers/usb/gadget/udc/atmel_usba_udc.h
index a0225e4543d4c642e64f3f207f909eaa32026306..48e332439ed5de550619e3c5bbb9c86274e63dac 100644 (file)
--- a/drivers/usb/gadget/udc/atmel_usba_udc.h
+++ b/drivers/usb/gadget/udc/atmel_usba_udc.h
@@ -290,6 +290,12 @@ struct usba_ep {
 #endif
 };
 
+struct usba_ep_config {
+       u8                                      nr_banks;
+       unsigned int                            can_dma:1;
+       unsigned int                            can_isoc:1;
+};
+
 struct usba_request {
        struct usb_request                      req;
        struct list_head                        queue;
@@ -307,6 +313,12 @@ struct usba_udc_errata {
        void (*pulse_bias)(struct usba_udc *udc);
 };
 
+struct usba_udc_config {
+       const struct usba_udc_errata *errata;
+       const struct usba_ep_config *config;
+       const int num_ep;
+};
+
 struct usba_udc {
        /* Protect hw registers from concurrent modifications */
        spinlock_t lock;