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Fri, 27 Mar 2020 06:33:16 +0000 From: To: CC: , , , , , , , , Subject: [PATCH v6 11/17] wilc1000: add spi.c Thread-Topic: [PATCH v6 11/17] wilc1000: add spi.c Thread-Index: AQHWBAGZWTlZUM4UiUSwYbBGBh9zVQ== Date: Fri, 27 Mar 2020 06:33:16 +0000 Message-ID: <20200327063302.20511-12-ajay.kathat@microchip.com> References: <20200327063302.20511-1-ajay.kathat@microchip.com> In-Reply-To: <20200327063302.20511-1-ajay.kathat@microchip.com> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-mailer: git-send-email 2.17.1 authentication-results: spf=none (sender IP is ) smtp.mailfrom=Ajay.Kathat@microchip.com; x-originating-ip: [183.82.22.58] x-ms-publictraffictype: Email x-ms-office365-filtering-correlation-id: 59ee0c0a-6afc-4de3-6943-08d7d218bbdd x-ms-traffictypediagnostic: BYAPR11MB3397: x-ms-exchange-transport-forked: True x-microsoft-antispam-prvs: x-bypassexternaltag: True x-ms-oob-tlc-oobclassifiers: OLM:185; x-forefront-prvs: 0355F3A3AE x-forefront-antispam-report: SFV:NSPM;SFS:(10009020)(39850400004)(136003)(376002)(346002)(366004)(396003)(81156014)(26005)(8676002)(81166006)(76116006)(66446008)(66556008)(66476007)(36756003)(6512007)(66946007)(6486002)(64756008)(91956017)(2906002)(6506007)(4326008)(71200400001)(2616005)(107886003)(186003)(30864003)(86362001)(5660300002)(478600001)(1076003)(6916009)(316002)(8936002)(54906003)(579004);DIR:OUT;SFP:1101;SCL:1;SRVR:BYAPR11MB3397;H:BYAPR11MB3125.namprd11.prod.outlook.com;FPR:;SPF:None;LANG:en;PTR:InfoNoRecords; received-spf: None (protection.outlook.com: microchip.com does not designate permitted sender hosts) x-ms-exchange-senderadcheck: 1 x-microsoft-antispam: BCL:0; x-microsoft-antispam-message-info: OpReM26/ok5rSanWh1f1oNomtr9kNurkpax2AdSYtMKuSCQnKleLjHV02vKMGX9ZUtLumomijxVA8ntYLvHvM1Moz3ndK5vNgSY4L9uDYVYxeKrRTpjsApUMhzwTyf9hp03aQqRSxJNlM0pgerdeZ1HLSjxEwQ9rRf1es0MHa8lLP+M/c2YiP7OQ75spo7hRmdxydltiA5n725/dUCY88NynW3y1iimg2iTKVGhtVBO9sGcWio5X6ldqsvdj4SxqmQT95DK7ZMhe7tmXmfjgUwSLsGzxnJpb9c6KcsmvRZuZTnnf8VsTZw3ou9Ffrhp3Zsxoih+5w1kijuV+aE3hoPK9vxU7+mgIIio29NTNUrAwn/AumZnGy2ZA/rpe2YYyZERAePgQrGDMzubUioGMfoq5IGEWCYNmjA4WCufcB8mzR+FJDiNT1dGJjmkCpl7/ x-ms-exchange-antispam-messagedata: 8n1bBjFDWoHG6AfUOPLjjzWJQPK9IYglrRix9EzoMJyvFwqcWWQ374BrANrptKkAqSDtxeG4mr+T9dNEkMjANjwDqHiyxu5mNG6iFber0Hv7UHSDBT8QfuRmo9So5UAjIe8QvoIpah5qKceO4GVJfA== Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 X-MS-Exchange-CrossTenant-Network-Message-Id: 59ee0c0a-6afc-4de3-6943-08d7d218bbdd X-MS-Exchange-CrossTenant-originalarrivaltime: 27 Mar 2020 06:33:16.7113 (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: F/YHcHrS5mjT/R/bbdbeRq6ssCM0PLdenTuVB1SyK5CSdxOKgDLqZ5LyZf2E6mBFNPhJeAiaWlGxGMX3GDJEXpnmnydczRWplAy9vzW9Sko= X-MS-Exchange-Transport-CrossTenantHeadersStamped: BYAPR11MB3397 Sender: linux-wireless-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-wireless@vger.kernel.org From: Ajay Singh Moved 'drivers/staging/wilc1000/spi.c' to 'drivers/net/wireless/microchip/wilc1000/spi.c'. Signed-off-by: Ajay Singh --- drivers/net/wireless/microchip/wilc1000/spi.c | 945 ++++++++++++++++++ 1 file changed, 945 insertions(+) create mode 100644 drivers/net/wireless/microchip/wilc1000/spi.c diff --git a/drivers/net/wireless/microchip/wilc1000/spi.c b/drivers/net/wi= reless/microchip/wilc1000/spi.c new file mode 100644 index 000000000000..3f19e3f38a39 --- /dev/null +++ b/drivers/net/wireless/microchip/wilc1000/spi.c @@ -0,0 +1,945 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Copyright (c) 2012 - 2018 Microchip Technology Inc., and its subsidiari= es. + * All rights reserved. + */ + +#include +#include +#include + +#include "netdev.h" +#include "cfg80211.h" + +struct wilc_spi { + int crc_off; +}; + +static const struct wilc_hif_func wilc_hif_spi; + +/******************************************** + * + * Spi protocol Function + * + ********************************************/ + +#define CMD_DMA_WRITE 0xc1 +#define CMD_DMA_READ 0xc2 +#define CMD_INTERNAL_WRITE 0xc3 +#define CMD_INTERNAL_READ 0xc4 +#define CMD_TERMINATE 0xc5 +#define CMD_REPEAT 0xc6 +#define CMD_DMA_EXT_WRITE 0xc7 +#define CMD_DMA_EXT_READ 0xc8 +#define CMD_SINGLE_WRITE 0xc9 +#define CMD_SINGLE_READ 0xca +#define CMD_RESET 0xcf + +#define DATA_PKT_SZ_256 256 +#define DATA_PKT_SZ_512 512 +#define DATA_PKT_SZ_1K 1024 +#define DATA_PKT_SZ_4K (4 * 1024) +#define DATA_PKT_SZ_8K (8 * 1024) +#define DATA_PKT_SZ DATA_PKT_SZ_8K + +#define USE_SPI_DMA 0 + +#define WILC_SPI_COMMAND_STAT_SUCCESS 0 +#define WILC_GET_RESP_HDR_START(h) (((h) >> 4) & 0xf) + +struct wilc_spi_cmd { + u8 cmd_type; + union { + struct { + u8 addr[3]; + u8 crc[]; + } __packed simple_cmd; + struct { + u8 addr[3]; + u8 size[2]; + u8 crc[]; + } __packed dma_cmd; + struct { + u8 addr[3]; + u8 size[3]; + u8 crc[]; + } __packed dma_cmd_ext; + struct { + u8 addr[2]; + __be32 data; + u8 crc[]; + } __packed internal_w_cmd; + struct { + u8 addr[3]; + __be32 data; + u8 crc[]; + } __packed w_cmd; + } u; +} __packed; + +struct wilc_spi_read_rsp_data { + u8 rsp_cmd_type; + u8 status; + u8 resp_header; + u8 resp_data[4]; + u8 crc[]; +} __packed; + +struct wilc_spi_rsp_data { + u8 rsp_cmd_type; + u8 status; +} __packed; + +static int wilc_bus_probe(struct spi_device *spi) +{ + int ret; + struct wilc *wilc; + struct wilc_spi *spi_priv; + + spi_priv =3D kzalloc(sizeof(*spi_priv), GFP_KERNEL); + if (!spi_priv) + return -ENOMEM; + + ret =3D wilc_cfg80211_init(&wilc, &spi->dev, WILC_HIF_SPI, &wilc_hif_spi)= ; + if (ret) { + kfree(spi_priv); + return ret; + } + + spi_set_drvdata(spi, wilc); + wilc->dev =3D &spi->dev; + wilc->bus_data =3D spi_priv; + wilc->dev_irq_num =3D spi->irq; + + wilc->rtc_clk =3D devm_clk_get(&spi->dev, "rtc_clk"); + if (PTR_ERR_OR_ZERO(wilc->rtc_clk) =3D=3D -EPROBE_DEFER) + return -EPROBE_DEFER; + else if (!IS_ERR(wilc->rtc_clk)) + clk_prepare_enable(wilc->rtc_clk); + + return 0; +} + +static int wilc_bus_remove(struct spi_device *spi) +{ + struct wilc *wilc =3D spi_get_drvdata(spi); + + if (!IS_ERR(wilc->rtc_clk)) + clk_disable_unprepare(wilc->rtc_clk); + + wilc_netdev_cleanup(wilc); + return 0; +} + +static const struct of_device_id wilc_of_match[] =3D { + { .compatible =3D "microchip,wilc1000", }, + { /* sentinel */ } +}; +MODULE_DEVICE_TABLE(of, wilc_of_match); + +static struct spi_driver wilc_spi_driver =3D { + .driver =3D { + .name =3D MODALIAS, + .of_match_table =3D wilc_of_match, + }, + .probe =3D wilc_bus_probe, + .remove =3D wilc_bus_remove, +}; +module_spi_driver(wilc_spi_driver); +MODULE_LICENSE("GPL"); + +static int wilc_spi_tx(struct wilc *wilc, u8 *b, u32 len) +{ + struct spi_device *spi =3D to_spi_device(wilc->dev); + int ret; + struct spi_message msg; + + if (len > 0 && b) { + struct spi_transfer tr =3D { + .tx_buf =3D b, + .len =3D len, + .delay =3D { + .value =3D 0, + .unit =3D SPI_DELAY_UNIT_USECS + }, + }; + char *r_buffer =3D kzalloc(len, GFP_KERNEL); + + if (!r_buffer) + return -ENOMEM; + + tr.rx_buf =3D r_buffer; + dev_dbg(&spi->dev, "Request writing %d bytes\n", len); + + memset(&msg, 0, sizeof(msg)); + spi_message_init(&msg); + msg.spi =3D spi; + msg.is_dma_mapped =3D USE_SPI_DMA; + spi_message_add_tail(&tr, &msg); + + ret =3D spi_sync(spi, &msg); + if (ret < 0) + dev_err(&spi->dev, "SPI transaction failed\n"); + + kfree(r_buffer); + } else { + dev_err(&spi->dev, + "can't write data with the following length: %d\n", + len); + ret =3D -EINVAL; + } + + return ret; +} + +static int wilc_spi_rx(struct wilc *wilc, u8 *rb, u32 rlen) +{ + struct spi_device *spi =3D to_spi_device(wilc->dev); + int ret; + + if (rlen > 0) { + struct spi_message msg; + struct spi_transfer tr =3D { + .rx_buf =3D rb, + .len =3D rlen, + .delay =3D { + .value =3D 0, + .unit =3D SPI_DELAY_UNIT_USECS + }, + + }; + char *t_buffer =3D kzalloc(rlen, GFP_KERNEL); + + if (!t_buffer) + return -ENOMEM; + + tr.tx_buf =3D t_buffer; + + memset(&msg, 0, sizeof(msg)); + spi_message_init(&msg); + msg.spi =3D spi; + msg.is_dma_mapped =3D USE_SPI_DMA; + spi_message_add_tail(&tr, &msg); + + ret =3D spi_sync(spi, &msg); + if (ret < 0) + dev_err(&spi->dev, "SPI transaction failed\n"); + kfree(t_buffer); + } else { + dev_err(&spi->dev, + "can't read data with the following length: %u\n", + rlen); + ret =3D -EINVAL; + } + + return ret; +} + +static int wilc_spi_tx_rx(struct wilc *wilc, u8 *wb, u8 *rb, u32 rlen) +{ + struct spi_device *spi =3D to_spi_device(wilc->dev); + int ret; + + if (rlen > 0) { + struct spi_message msg; + struct spi_transfer tr =3D { + .rx_buf =3D rb, + .tx_buf =3D wb, + .len =3D rlen, + .bits_per_word =3D 8, + .delay =3D { + .value =3D 0, + .unit =3D SPI_DELAY_UNIT_USECS + }, + + }; + + memset(&msg, 0, sizeof(msg)); + spi_message_init(&msg); + msg.spi =3D spi; + msg.is_dma_mapped =3D USE_SPI_DMA; + + spi_message_add_tail(&tr, &msg); + ret =3D spi_sync(spi, &msg); + if (ret < 0) + dev_err(&spi->dev, "SPI transaction failed\n"); + } else { + dev_err(&spi->dev, + "can't read data with the following length: %u\n", + rlen); + ret =3D -EINVAL; + } + + return ret; +} + +static int spi_data_write(struct wilc *wilc, u8 *b, u32 sz) +{ + struct spi_device *spi =3D to_spi_device(wilc->dev); + struct wilc_spi *spi_priv =3D wilc->bus_data; + int ix, nbytes; + int result =3D 0; + u8 cmd, order, crc[2] =3D {0}; + + /* + * Data + */ + ix =3D 0; + do { + if (sz <=3D DATA_PKT_SZ) { + nbytes =3D sz; + order =3D 0x3; + } else { + nbytes =3D DATA_PKT_SZ; + if (ix =3D=3D 0) + order =3D 0x1; + else + order =3D 0x02; + } + + /* + * Write command + */ + cmd =3D 0xf0; + cmd |=3D order; + + if (wilc_spi_tx(wilc, &cmd, 1)) { + dev_err(&spi->dev, + "Failed data block cmd write, bus error...\n"); + result =3D -EINVAL; + break; + } + + /* + * Write data + */ + if (wilc_spi_tx(wilc, &b[ix], nbytes)) { + dev_err(&spi->dev, + "Failed data block write, bus error...\n"); + result =3D -EINVAL; + break; + } + + /* + * Write Crc + */ + if (!spi_priv->crc_off) { + if (wilc_spi_tx(wilc, crc, 2)) { + dev_err(&spi->dev, "Failed data block crc write, bus error...\n"); + result =3D -EINVAL; + break; + } + } + + /* + * No need to wait for response + */ + ix +=3D nbytes; + sz -=3D nbytes; + } while (sz); + + return result; +} + +/******************************************** + * + * Spi Internal Read/Write Function + * + ********************************************/ +static u8 wilc_get_crc7(u8 *buffer, u32 len) +{ + return crc7_be(0xfe, buffer, len); +} + +static int wilc_spi_single_read(struct wilc *wilc, u8 cmd, u32 adr, void *= b, + u8 clockless) +{ + struct spi_device *spi =3D to_spi_device(wilc->dev); + struct wilc_spi *spi_priv =3D wilc->bus_data; + u8 wb[32], rb[32]; + int cmd_len, resp_len; + u8 crc[2]; + struct wilc_spi_cmd *c; + struct wilc_spi_read_rsp_data *r; + + memset(wb, 0x0, sizeof(wb)); + memset(rb, 0x0, sizeof(rb)); + c =3D (struct wilc_spi_cmd *)wb; + c->cmd_type =3D cmd; + if (cmd =3D=3D CMD_SINGLE_READ) { + c->u.simple_cmd.addr[0] =3D adr >> 16; + c->u.simple_cmd.addr[1] =3D adr >> 8; + c->u.simple_cmd.addr[2] =3D adr; + } else if (cmd =3D=3D CMD_INTERNAL_READ) { + c->u.simple_cmd.addr[0] =3D adr >> 8; + if (clockless =3D=3D 1) + c->u.simple_cmd.addr[0] |=3D BIT(7); + c->u.simple_cmd.addr[1] =3D adr; + c->u.simple_cmd.addr[2] =3D 0x0; + } else { + dev_err(&spi->dev, "cmd [%x] not supported\n", cmd); + return -EINVAL; + } + + cmd_len =3D offsetof(struct wilc_spi_cmd, u.simple_cmd.crc); + resp_len =3D sizeof(*r); + if (!spi_priv->crc_off) { + c->u.simple_cmd.crc[0] =3D wilc_get_crc7(wb, cmd_len); + cmd_len +=3D 1; + resp_len +=3D 2; + } + + if (cmd_len + resp_len > ARRAY_SIZE(wb)) { + dev_err(&spi->dev, + "spi buffer size too small (%d) (%d) (%zu)\n", + cmd_len, resp_len, ARRAY_SIZE(wb)); + return -EINVAL; + } + + if (wilc_spi_tx_rx(wilc, wb, rb, cmd_len + resp_len)) { + dev_err(&spi->dev, "Failed cmd write, bus error...\n"); + return -EINVAL; + } + + r =3D (struct wilc_spi_read_rsp_data *)&rb[cmd_len]; + if (r->rsp_cmd_type !=3D cmd) { + dev_err(&spi->dev, + "Failed cmd response, cmd (%02x), resp (%02x)\n", + cmd, r->rsp_cmd_type); + return -EINVAL; + } + + if (r->status !=3D WILC_SPI_COMMAND_STAT_SUCCESS) { + dev_err(&spi->dev, "Failed cmd state response state (%02x)\n", + r->status); + return -EINVAL; + } + + if (WILC_GET_RESP_HDR_START(r->resp_header) !=3D 0xf) { + dev_err(&spi->dev, "Error, data read response (%02x)\n", + r->resp_header); + return -EINVAL; + } + + if (b) + memcpy(b, r->resp_data, 4); + + if (!spi_priv->crc_off) + memcpy(crc, r->crc, 2); + + return 0; +} + +static int wilc_spi_write_cmd(struct wilc *wilc, u8 cmd, u32 adr, u32 data= , + u8 clockless) +{ + struct spi_device *spi =3D to_spi_device(wilc->dev); + struct wilc_spi *spi_priv =3D wilc->bus_data; + u8 wb[32], rb[32]; + int cmd_len, resp_len; + struct wilc_spi_cmd *c; + struct wilc_spi_rsp_data *r; + + memset(wb, 0x0, sizeof(wb)); + memset(rb, 0x0, sizeof(rb)); + c =3D (struct wilc_spi_cmd *)wb; + c->cmd_type =3D cmd; + if (cmd =3D=3D CMD_INTERNAL_WRITE) { + c->u.internal_w_cmd.addr[0] =3D adr >> 8; + if (clockless =3D=3D 1) + c->u.internal_w_cmd.addr[0] |=3D BIT(7); + + c->u.internal_w_cmd.addr[1] =3D adr; + c->u.internal_w_cmd.data =3D cpu_to_be32(data); + cmd_len =3D offsetof(struct wilc_spi_cmd, u.internal_w_cmd.crc); + if (!spi_priv->crc_off) + c->u.internal_w_cmd.crc[0] =3D wilc_get_crc7(wb, cmd_len); + } else if (cmd =3D=3D CMD_SINGLE_WRITE) { + c->u.w_cmd.addr[0] =3D adr >> 16; + c->u.w_cmd.addr[1] =3D adr >> 8; + c->u.w_cmd.addr[2] =3D adr; + c->u.w_cmd.data =3D cpu_to_be32(data); + cmd_len =3D offsetof(struct wilc_spi_cmd, u.w_cmd.crc); + if (!spi_priv->crc_off) + c->u.w_cmd.crc[0] =3D wilc_get_crc7(wb, cmd_len); + } else { + dev_err(&spi->dev, "write cmd [%x] not supported\n", cmd); + return -EINVAL; + } + + if (!spi_priv->crc_off) + cmd_len +=3D 1; + + resp_len =3D sizeof(*r); + + if (cmd_len + resp_len > ARRAY_SIZE(wb)) { + dev_err(&spi->dev, + "spi buffer size too small (%d) (%d) (%zu)\n", + cmd_len, resp_len, ARRAY_SIZE(wb)); + return -EINVAL; + } + + if (wilc_spi_tx_rx(wilc, wb, rb, cmd_len + resp_len)) { + dev_err(&spi->dev, "Failed cmd write, bus error...\n"); + return -EINVAL; + } + + r =3D (struct wilc_spi_rsp_data *)&rb[cmd_len]; + if (r->rsp_cmd_type !=3D cmd) { + dev_err(&spi->dev, + "Failed cmd response, cmd (%02x), resp (%02x)\n", + cmd, r->rsp_cmd_type); + return -EINVAL; + } + + if (r->status !=3D WILC_SPI_COMMAND_STAT_SUCCESS) { + dev_err(&spi->dev, "Failed cmd state response state (%02x)\n", + r->status); + return -EINVAL; + } + + return 0; +} + +static int wilc_spi_dma_rw(struct wilc *wilc, u8 cmd, u32 adr, u8 *b, u32 = sz) +{ + struct spi_device *spi =3D to_spi_device(wilc->dev); + struct wilc_spi *spi_priv =3D wilc->bus_data; + u8 wb[32], rb[32]; + int cmd_len, resp_len; + int retry, ix =3D 0; + u8 crc[2]; + struct wilc_spi_cmd *c; + struct wilc_spi_rsp_data *r; + + memset(wb, 0x0, sizeof(wb)); + memset(rb, 0x0, sizeof(rb)); + c =3D (struct wilc_spi_cmd *)wb; + c->cmd_type =3D cmd; + if (cmd =3D=3D CMD_DMA_WRITE || cmd =3D=3D CMD_DMA_READ) { + c->u.dma_cmd.addr[0] =3D adr >> 16; + c->u.dma_cmd.addr[1] =3D adr >> 8; + c->u.dma_cmd.addr[2] =3D adr; + c->u.dma_cmd.size[0] =3D sz >> 8; + c->u.dma_cmd.size[1] =3D sz; + cmd_len =3D offsetof(struct wilc_spi_cmd, u.dma_cmd.crc); + if (!spi_priv->crc_off) + c->u.dma_cmd.crc[0] =3D wilc_get_crc7(wb, cmd_len); + } else if (cmd =3D=3D CMD_DMA_EXT_WRITE || cmd =3D=3D CMD_DMA_EXT_READ) { + c->u.dma_cmd_ext.addr[0] =3D adr >> 16; + c->u.dma_cmd_ext.addr[1] =3D adr >> 8; + c->u.dma_cmd_ext.addr[2] =3D adr; + c->u.dma_cmd_ext.size[0] =3D sz >> 16; + c->u.dma_cmd_ext.size[1] =3D sz >> 8; + c->u.dma_cmd_ext.size[2] =3D sz; + cmd_len =3D offsetof(struct wilc_spi_cmd, u.dma_cmd_ext.crc); + if (!spi_priv->crc_off) + c->u.dma_cmd_ext.crc[0] =3D wilc_get_crc7(wb, cmd_len); + } else { + dev_err(&spi->dev, "dma read write cmd [%x] not supported\n", + cmd); + return -EINVAL; + } + if (!spi_priv->crc_off) + cmd_len +=3D 1; + + resp_len =3D sizeof(*r); + + if (cmd_len + resp_len > ARRAY_SIZE(wb)) { + dev_err(&spi->dev, "spi buffer size too small (%d)(%d) (%zu)\n", + cmd_len, resp_len, ARRAY_SIZE(wb)); + return -EINVAL; + } + + if (wilc_spi_tx_rx(wilc, wb, rb, cmd_len + resp_len)) { + dev_err(&spi->dev, "Failed cmd write, bus error...\n"); + return -EINVAL; + } + + r =3D (struct wilc_spi_rsp_data *)&rb[cmd_len]; + if (r->rsp_cmd_type !=3D cmd) { + dev_err(&spi->dev, + "Failed cmd response, cmd (%02x), resp (%02x)\n", + cmd, r->rsp_cmd_type); + return -EINVAL; + } + + if (r->status !=3D WILC_SPI_COMMAND_STAT_SUCCESS) { + dev_err(&spi->dev, "Failed cmd state response state (%02x)\n", + r->status); + return -EINVAL; + } + + if (cmd =3D=3D CMD_DMA_WRITE || cmd =3D=3D CMD_DMA_EXT_WRITE) + return 0; + + while (sz > 0) { + int nbytes; + u8 rsp; + + if (sz <=3D DATA_PKT_SZ) + nbytes =3D sz; + else + nbytes =3D DATA_PKT_SZ; + + /* + * Data Response header + */ + retry =3D 100; + do { + if (wilc_spi_rx(wilc, &rsp, 1)) { + dev_err(&spi->dev, + "Failed resp read, bus err\n"); + return -EINVAL; + } + if (WILC_GET_RESP_HDR_START(rsp) =3D=3D 0xf) + break; + } while (retry--); + + /* + * Read bytes + */ + if (wilc_spi_rx(wilc, &b[ix], nbytes)) { + dev_err(&spi->dev, + "Failed block read, bus err\n"); + return -EINVAL; + } + + /* + * Read Crc + */ + if (!spi_priv->crc_off && wilc_spi_rx(wilc, crc, 2)) { + dev_err(&spi->dev, + "Failed block crc read, bus err\n"); + return -EINVAL; + } + + ix +=3D nbytes; + sz -=3D nbytes; + } + return 0; +} + +static int wilc_spi_read_reg(struct wilc *wilc, u32 addr, u32 *data) +{ + struct spi_device *spi =3D to_spi_device(wilc->dev); + int result; + u8 cmd =3D CMD_SINGLE_READ; + u8 clockless =3D 0; + + if (addr < WILC_SPI_CLOCKLESS_ADDR_LIMIT) { + /* Clockless register */ + cmd =3D CMD_INTERNAL_READ; + clockless =3D 1; + } + + result =3D wilc_spi_single_read(wilc, cmd, addr, data, clockless); + if (result) { + dev_err(&spi->dev, "Failed cmd, read reg (%08x)...\n", addr); + return result; + } + + le32_to_cpus(data); + + return 0; +} + +static int wilc_spi_read(struct wilc *wilc, u32 addr, u8 *buf, u32 size) +{ + struct spi_device *spi =3D to_spi_device(wilc->dev); + int result; + + if (size <=3D 4) + return -EINVAL; + + result =3D wilc_spi_dma_rw(wilc, CMD_DMA_EXT_READ, addr, buf, size); + if (result) { + dev_err(&spi->dev, "Failed cmd, read block (%08x)...\n", addr); + return result; + } + + return 0; +} + +static int spi_internal_write(struct wilc *wilc, u32 adr, u32 dat) +{ + struct spi_device *spi =3D to_spi_device(wilc->dev); + int result; + + result =3D wilc_spi_write_cmd(wilc, CMD_INTERNAL_WRITE, adr, dat, 0); + if (result) { + dev_err(&spi->dev, "Failed internal write cmd...\n"); + return result; + } + + return 0; +} + +static int spi_internal_read(struct wilc *wilc, u32 adr, u32 *data) +{ + struct spi_device *spi =3D to_spi_device(wilc->dev); + int result; + + result =3D wilc_spi_single_read(wilc, CMD_INTERNAL_READ, adr, data, 0); + if (result) { + dev_err(&spi->dev, "Failed internal read cmd...\n"); + return result; + } + + le32_to_cpus(data); + + return 0; +} + +/******************************************** + * + * Spi interfaces + * + ********************************************/ + +static int wilc_spi_write_reg(struct wilc *wilc, u32 addr, u32 data) +{ + struct spi_device *spi =3D to_spi_device(wilc->dev); + int result; + u8 cmd =3D CMD_SINGLE_WRITE; + u8 clockless =3D 0; + + if (addr < WILC_SPI_CLOCKLESS_ADDR_LIMIT) { + /* Clockless register */ + cmd =3D CMD_INTERNAL_WRITE; + clockless =3D 1; + } + + result =3D wilc_spi_write_cmd(wilc, cmd, addr, data, clockless); + if (result) { + dev_err(&spi->dev, "Failed cmd, write reg (%08x)...\n", addr); + return result; + } + + return 0; +} + +static int wilc_spi_write(struct wilc *wilc, u32 addr, u8 *buf, u32 size) +{ + struct spi_device *spi =3D to_spi_device(wilc->dev); + int result; + + /* + * has to be greated than 4 + */ + if (size <=3D 4) + return -EINVAL; + + result =3D wilc_spi_dma_rw(wilc, CMD_DMA_EXT_WRITE, addr, NULL, size); + if (result) { + dev_err(&spi->dev, + "Failed cmd, write block (%08x)...\n", addr); + return result; + } + + /* + * Data + */ + result =3D spi_data_write(wilc, buf, size); + if (result) { + dev_err(&spi->dev, "Failed block data write...\n"); + return result; + } + + return 0; +} + +/******************************************** + * + * Bus interfaces + * + ********************************************/ + +static int wilc_spi_deinit(struct wilc *wilc) +{ + /* + * TODO: + */ + return 0; +} + +static int wilc_spi_init(struct wilc *wilc, bool resume) +{ + struct spi_device *spi =3D to_spi_device(wilc->dev); + struct wilc_spi *spi_priv =3D wilc->bus_data; + u32 reg; + u32 chipid; + static int isinit; + int ret; + + if (isinit) { + ret =3D wilc_spi_read_reg(wilc, WILC_CHIPID, &chipid); + if (ret) + dev_err(&spi->dev, "Fail cmd read chip id...\n"); + + return ret; + } + + /* + * configure protocol + */ + + /* + * TODO: We can remove the CRC trials if there is a definite + * way to reset + */ + /* the SPI to it's initial value. */ + ret =3D spi_internal_read(wilc, WILC_SPI_PROTOCOL_OFFSET, ®); + if (ret) { + /* + * Read failed. Try with CRC off. This might happen when module + * is removed but chip isn't reset + */ + spi_priv->crc_off =3D 1; + dev_err(&spi->dev, + "Failed read with CRC on, retrying with CRC off\n"); + ret =3D spi_internal_read(wilc, WILC_SPI_PROTOCOL_OFFSET, ®); + if (ret) { + /* + * Read failed with both CRC on and off, + * something went bad + */ + dev_err(&spi->dev, "Failed internal read protocol\n"); + return ret; + } + } + if (spi_priv->crc_off =3D=3D 0) { + reg &=3D ~0xc; /* disable crc checking */ + reg &=3D ~0x70; + reg |=3D (0x5 << 4); + ret =3D spi_internal_write(wilc, WILC_SPI_PROTOCOL_OFFSET, reg); + if (ret) { + dev_err(&spi->dev, + "[wilc spi %d]: Failed internal write reg\n", + __LINE__); + return ret; + } + spi_priv->crc_off =3D 1; + } + + /* + * make sure can read back chip id correctly + */ + ret =3D wilc_spi_read_reg(wilc, WILC_CHIPID, &chipid); + if (ret) { + dev_err(&spi->dev, "Fail cmd read chip id...\n"); + return ret; + } + + isinit =3D 1; + + return 0; +} + +static int wilc_spi_read_size(struct wilc *wilc, u32 *size) +{ + int ret; + + ret =3D spi_internal_read(wilc, + WILC_SPI_INT_STATUS - WILC_SPI_REG_BASE, size); + *size =3D FIELD_GET(IRQ_DMA_WD_CNT_MASK, *size); + + return ret; +} + +static int wilc_spi_read_int(struct wilc *wilc, u32 *int_status) +{ + return spi_internal_read(wilc, WILC_SPI_INT_STATUS - WILC_SPI_REG_BASE, + int_status); +} + +static int wilc_spi_clear_int_ext(struct wilc *wilc, u32 val) +{ + return spi_internal_write(wilc, WILC_SPI_INT_CLEAR - WILC_SPI_REG_BASE, + val); +} + +static int wilc_spi_sync_ext(struct wilc *wilc, int nint) +{ + struct spi_device *spi =3D to_spi_device(wilc->dev); + u32 reg; + int ret, i; + + if (nint > MAX_NUM_INT) { + dev_err(&spi->dev, "Too many interrupts (%d)...\n", nint); + return -EINVAL; + } + + /* + * interrupt pin mux select + */ + ret =3D wilc_spi_read_reg(wilc, WILC_PIN_MUX_0, ®); + if (ret) { + dev_err(&spi->dev, "Failed read reg (%08x)...\n", + WILC_PIN_MUX_0); + return ret; + } + reg |=3D BIT(8); + ret =3D wilc_spi_write_reg(wilc, WILC_PIN_MUX_0, reg); + if (ret) { + dev_err(&spi->dev, "Failed write reg (%08x)...\n", + WILC_PIN_MUX_0); + return ret; + } + + /* + * interrupt enable + */ + ret =3D wilc_spi_read_reg(wilc, WILC_INTR_ENABLE, ®); + if (ret) { + dev_err(&spi->dev, "Failed read reg (%08x)...\n", + WILC_INTR_ENABLE); + return ret; + } + + for (i =3D 0; (i < 5) && (nint > 0); i++, nint--) + reg |=3D (BIT((27 + i))); + + ret =3D wilc_spi_write_reg(wilc, WILC_INTR_ENABLE, reg); + if (ret) { + dev_err(&spi->dev, "Failed write reg (%08x)...\n", + WILC_INTR_ENABLE); + return ret; + } + if (nint) { + ret =3D wilc_spi_read_reg(wilc, WILC_INTR2_ENABLE, ®); + if (ret) { + dev_err(&spi->dev, "Failed read reg (%08x)...\n", + WILC_INTR2_ENABLE); + return ret; + } + + for (i =3D 0; (i < 3) && (nint > 0); i++, nint--) + reg |=3D BIT(i); + + ret =3D wilc_spi_read_reg(wilc, WILC_INTR2_ENABLE, ®); + if (ret) { + dev_err(&spi->dev, "Failed write reg (%08x)...\n", + WILC_INTR2_ENABLE); + return ret; + } + } + + return 0; +} + +/* Global spi HIF function table */ +static const struct wilc_hif_func wilc_hif_spi =3D { + .hif_init =3D wilc_spi_init, + .hif_deinit =3D wilc_spi_deinit, + .hif_read_reg =3D wilc_spi_read_reg, + .hif_write_reg =3D wilc_spi_write_reg, + .hif_block_rx =3D wilc_spi_read, + .hif_block_tx =3D wilc_spi_write, + .hif_read_int =3D wilc_spi_read_int, + .hif_clear_int_ext =3D wilc_spi_clear_int_ext, + .hif_read_size =3D wilc_spi_read_size, + .hif_block_tx_ext =3D wilc_spi_write, + .hif_block_rx_ext =3D wilc_spi_read, + .hif_sync_ext =3D wilc_spi_sync_ext, +}; --=20 2.24.0