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Fri, 22 Nov 2019 16:02:45 +0000 From: To: , , , , , CC: , , , , , , Subject: Re: [PATCH 1/3] usb: gadget: udc: atmel: Don't use DT to configure end point Thread-Topic: [PATCH 1/3] usb: gadget: udc: atmel: Don't use DT to configure end point Thread-Index: AQHVlYDym5rdrdrQREOsK+cV/BK4VqeXXUWAgAAUNIA= Date: Fri, 22 Nov 2019 16:02:45 +0000 Message-ID: References: <20191107153128.11038-1-gregory.clement@bootlin.com> <20191107153128.11038-2-gregory.clement@bootlin.com> <871ru0x8ws.fsf@FE-laptop> In-Reply-To: <871ru0x8ws.fsf@FE-laptop> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: user-agent: Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.9.0 x-originating-ip: [94.177.32.156] x-clientproxiedby: AM3PR05CA0117.eurprd05.prod.outlook.com (2603:10a6:207:2::19) To BYAPR11MB2647.namprd11.prod.outlook.com (2603:10b6:a02:be::12) x-ms-exchange-messagesentrepresentingtype: 1 x-tagtoolbar-keys: D20191122180229186 x-ms-publictraffictype: Email x-ms-office365-filtering-correlation-id: e7506c7b-d586-4cbe-7b09-08d76f6569b8 x-ms-traffictypediagnostic: BYAPR11MB2616: x-ms-exchange-transport-forked: True x-microsoft-antispam-prvs: x-ms-oob-tlc-oobclassifiers: OLM:9508; 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charset="Windows-1252" Content-ID: <93AA6D7AF16C4A478500CE5392E3DC27@namprd11.prod.outlook.com> Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 X-MS-Exchange-CrossTenant-Network-Message-Id: e7506c7b-d586-4cbe-7b09-08d76f6569b8 X-MS-Exchange-CrossTenant-originalarrivaltime: 22 Nov 2019 16:02:45.4241 (UTC) X-MS-Exchange-CrossTenant-fromentityheader: Hosted X-MS-Exchange-CrossTenant-id: 3f4057f3-b418-4d4e-ba84-d55b4e897d88 X-MS-Exchange-CrossTenant-mailboxtype: HOSTED X-MS-Exchange-CrossTenant-userprincipalname: NPWgItXqFhKS9d8yke9nPV7QHwB6kqZf8WY3ny3U4ITk8PWXCgapEee6JLOA+eo9uyvfL2BdIK7rvTbfBd+aiyqNO/nOYSaIZudgNxyIfYU= X-MS-Exchange-Transport-CrossTenantHeadersStamped: BYAPR11MB2616 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 11/22/19 4:50 PM, Gregory CLEMENT wrote: > Hello, >=20 >> 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. >=20 > Do you have any feedback about this patch ? >=20 > The binding being reviewed is there any chance that this patch will be > merged? Hi Gregory, Thank you for sending the patch. It looks good to me. I checked it briefly on sama5d2 with the in kernel cdc-acm. >=20 > Thanks, >=20 > Gregory >=20 >=20 >> >> Signed-off-by: Gregory CLEMENT Acked-by: Cristian Birsan >> --- >> drivers/usb/gadget/udc/atmel_usba_udc.c | 112 +++++++++++++++--------- >> drivers/usb/gadget/udc/atmel_usba_udc.h | 12 +++ >> 2 files changed, 84 insertions(+), 40 deletions(-) >> >> diff --git a/drivers/usb/gadget/udc/atmel_usba_udc.c b/drivers/usb/gadge= t/udc/atmel_usba_udc.c >> index 86ffc8307864..2db833caeb09 100644 >> --- a/drivers/usb/gadget/udc/atmel_usba_udc.c >> +++ b/drivers/usb/gadget/udc/atmel_usba_udc.c >> @@ -2040,10 +2040,56 @@ static const struct usba_udc_errata at91sam9g45_= errata =3D { >> .pulse_bias =3D at91sam9g45_pulse_bias, >> }; >> >> +static const struct usba_ep_config ep_config_sam9[] __initconst =3D { >> + { .nr_banks =3D 1 }, /* ep 0 */ >> + { .nr_banks =3D 2, .can_dma =3D 1, .can_isoc =3D 1 }, /* ep 1 */ >> + { .nr_banks =3D 2, .can_dma =3D 1, .can_isoc =3D 1 }, /* ep 2 */ >> + { .nr_banks =3D 3, .can_dma =3D 1 }, /* ep 3 */ >> + { .nr_banks =3D 3, .can_dma =3D 1 }, /* ep 4 */ >> + { .nr_banks =3D 3, .can_dma =3D 1, .can_isoc =3D 1 }, /* ep 5 */ >> + { .nr_banks =3D 3, .can_dma =3D 1, .can_isoc =3D 1 }, /* ep 6 */ >> +}; >> + >> +static const struct usba_ep_config ep_config_sama5[] __initconst =3D { >> + { .nr_banks =3D 1 }, /* ep 0 */ >> + { .nr_banks =3D 3, .can_dma =3D 1, .can_isoc =3D 1 }, /* ep 1 */ >> + { .nr_banks =3D 3, .can_dma =3D 1, .can_isoc =3D 1 }, /* ep 2 */ >> + { .nr_banks =3D 2, .can_dma =3D 1, .can_isoc =3D 1 }, /* ep 3 */ >> + { .nr_banks =3D 2, .can_dma =3D 1, .can_isoc =3D 1 }, /* ep 4 */ >> + { .nr_banks =3D 2, .can_dma =3D 1, .can_isoc =3D 1 }, /* ep 5 */ >> + { .nr_banks =3D 2, .can_dma =3D 1, .can_isoc =3D 1 }, /* ep 6 */ >> + { .nr_banks =3D 2, .can_dma =3D 1, .can_isoc =3D 1 }, /* ep 7 */ >> + { .nr_banks =3D 2, .can_isoc =3D 1 }, /* ep 8 */ >> + { .nr_banks =3D 2, .can_isoc =3D 1 }, /* ep 9 */ >> + { .nr_banks =3D 2, .can_isoc =3D 1 }, /* ep 10 */ >> + { .nr_banks =3D 2, .can_isoc =3D 1 }, /* ep 11 */ >> + { .nr_banks =3D 2, .can_isoc =3D 1 }, /* ep 12 */ >> + { .nr_banks =3D 2, .can_isoc =3D 1 }, /* ep 13 */ >> + { .nr_banks =3D 2, .can_isoc =3D 1 }, /* ep 14 */ >> + { .nr_banks =3D 2, .can_isoc =3D 1 }, /* ep 15 */ >> +}; >> + >> +static const struct usba_udc_config udc_at91sam9rl_cfg =3D { >> + .errata =3D &at91sam9rl_errata, >> + .config =3D ep_config_sam9, >> + .num_ep =3D ARRAY_SIZE(ep_config_sam9), >> +}; >> + >> +static const struct usba_udc_config udc_at91sam9g45_cfg =3D { >> + .errata =3D &at91sam9g45_errata, >> + .config =3D ep_config_sam9, >> + .num_ep =3D ARRAY_SIZE(ep_config_sam9), >> +}; >> + >> +static const struct usba_udc_config udc_sama5d3_cfg =3D { >> + .config =3D ep_config_sama5, >> + .num_ep =3D ARRAY_SIZE(ep_config_sama5), >> +}; >> + >> static const struct of_device_id atmel_udc_dt_ids[] =3D { >> - { .compatible =3D "atmel,at91sam9rl-udc", .data =3D &at91sam9rl_er= rata }, >> - { .compatible =3D "atmel,at91sam9g45-udc", .data =3D &at91sam9g45_= errata }, >> - { .compatible =3D "atmel,sama5d3-udc" }, >> + { .compatible =3D "atmel,at91sam9rl-udc", .data =3D &udc_at91sam9r= l_cfg }, >> + { .compatible =3D "atmel,at91sam9g45-udc", .data =3D &udc_at91sam9= g45_cfg }, >> + { .compatible =3D "atmel,sama5d3-udc", .data =3D &udc_sama5d3_cfg = }, >> { /* sentinel */ } >> }; >> >> @@ -2052,18 +2098,19 @@ 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 =3D 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 =3D of_match_node(atmel_udc_dt_ids, np); >> if (!match) >> return ERR_PTR(-EINVAL); >> >> - udc->errata =3D match->data; >> + udc_config =3D match->data; >> + udc->errata =3D udc_config->errata; >> udc->pmc =3D syscon_regmap_lookup_by_compatible("atmel,at91sam9g4= 5-pmc"); >> if (IS_ERR(udc->pmc)) >> udc->pmc =3D syscon_regmap_lookup_by_compatible("atmel,at= 91sam9rl-pmc"); >> @@ -2079,8 +2126,7 @@ static struct usba_ep * atmel_udc_of_init(struct p= latform_device *pdev, >> >> if (fifo_mode =3D=3D 0) { >> pp =3D NULL; >> - while ((pp =3D of_get_next_child(np, pp))) >> - udc->num_ep++; >> + udc->num_ep =3D udc_config->num_ep; >> udc->configured_ep =3D 1; >> } else { >> udc->num_ep =3D usba_config_fifo_table(udc); >> @@ -2097,52 +2143,38 @@ static struct usba_ep * atmel_udc_of_init(struct= platform_device *pdev, >> >> pp =3D NULL; >> i =3D 0; >> - while ((pp =3D of_get_next_child(np, pp)) && i < udc->num_ep) { >> + while (i < udc->num_ep) { >> + const struct usba_ep_config *ep_cfg =3D &udc_config->confi= g[i]; >> + >> ep =3D &eps[i]; >> >> - ret =3D of_property_read_u32(pp, "reg", &val); >> - if (ret) { >> - dev_err(&pdev->dev, "of_probe: reg error(%d)\n", r= et); >> - goto err; >> - } >> - ep->index =3D fifo_mode ? udc->fifo_cfg[i].hw_ep_num : val= ; >> + ep->index =3D fifo_mode ? udc->fifo_cfg[i].hw_ep_num : i; >> + >> + /* Only the first EP is 64 bytes */ >> + if (ep->index =3D=3D 0) >> + ep->fifo_size =3D 64; >> + else >> + ep->fifo_size =3D 1024; >> >> - ret =3D 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 D= T\n"); >> - ep->fifo_size =3D val; >> - } else { >> + "Using default max fifo-size valu= e\n"); >> + else >> ep->fifo_size =3D udc->fifo_cfg[i].fifo_s= ize; >> - } >> - } else { >> - ep->fifo_size =3D val; >> } >> >> - ret =3D 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 =3D 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 =3D val; >> - } else { >> + "Using default max nb-banks value= \n"); >> + else >> ep->nr_banks =3D udc->fifo_cfg[i].nr_bank= s; >> - } >> - } else { >> - ep->nr_banks =3D val; >> } >> >> - ep->can_dma =3D of_property_read_bool(pp, "atmel,can-dma")= ; >> - ep->can_isoc =3D of_property_read_bool(pp, "atmel,can-isoc= "); >> + ep->can_dma =3D ep_cfg->can_dma; >> + ep->can_isoc =3D ep_cfg->can_isoc; >> >> sprintf(ep->name, "ep%d", ep->index); >> ep->ep.name =3D ep->name; >> diff --git a/drivers/usb/gadget/udc/atmel_usba_udc.h b/drivers/usb/gadge= t/udc/atmel_usba_udc.h >> index a0225e4543d4..48e332439ed5 100644 >> --- 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; >> -- >> 2.24.0.rc1 >> >=20 > -- > Gregory Clement, Bootlin > Embedded Linux and Kernel engineering > http://bootlin.com >=20