From 5625f965d7644b4dc6a71d74021cfe093ad34eea Mon Sep 17 00:00:00 2001 From: Ajay Singh Date: Thu, 25 Jun 2020 12:37:23 +0000 Subject: wilc1000: move wilc driver out of staging WILC1000 is an IEEE 802.11 b/g/n IoT link controller module. The WILC1000 connects to Microchip AVR/SMART MCUs, SMART MPUs, and other processors with minimal resource requirements with a simple SPI/SDIO-to-Wi-Fi interface. WILC1000 driver has been part of staging for few years. With contributions from the community, it has improved significantly. Full driver review has helped in achieving the current state. The details for those reviews are captured in 1 & 2. [1]. https://lore.kernel.org/linux-wireless/1537957525-11467-1-git-send-email-ajay.kathat@microchip.com/ [2]. https://lore.kernel.org/linux-wireless/1562896697-8002-1-git-send-email-ajay.kathat@microchip.com/ Signed-off-by: Ajay Singh Signed-off-by: Kalle Valo --- drivers/staging/wilc1000/spi.c | 945 ----------------------------------------- 1 file changed, 945 deletions(-) delete mode 100644 drivers/staging/wilc1000/spi.c (limited to 'drivers/staging/wilc1000/spi.c') diff --git a/drivers/staging/wilc1000/spi.c b/drivers/staging/wilc1000/spi.c deleted file mode 100644 index 3f19e3f38a39..000000000000 --- a/drivers/staging/wilc1000/spi.c +++ /dev/null @@ -1,945 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0 -/* - * Copyright (c) 2012 - 2018 Microchip Technology Inc., and its subsidiaries. - * 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 = kzalloc(sizeof(*spi_priv), GFP_KERNEL); - if (!spi_priv) - return -ENOMEM; - - ret = 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 = &spi->dev; - wilc->bus_data = spi_priv; - wilc->dev_irq_num = spi->irq; - - wilc->rtc_clk = devm_clk_get(&spi->dev, "rtc_clk"); - if (PTR_ERR_OR_ZERO(wilc->rtc_clk) == -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 = 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[] = { - { .compatible = "microchip,wilc1000", }, - { /* sentinel */ } -}; -MODULE_DEVICE_TABLE(of, wilc_of_match); - -static struct spi_driver wilc_spi_driver = { - .driver = { - .name = MODALIAS, - .of_match_table = wilc_of_match, - }, - .probe = wilc_bus_probe, - .remove = 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 = to_spi_device(wilc->dev); - int ret; - struct spi_message msg; - - if (len > 0 && b) { - struct spi_transfer tr = { - .tx_buf = b, - .len = len, - .delay = { - .value = 0, - .unit = SPI_DELAY_UNIT_USECS - }, - }; - char *r_buffer = kzalloc(len, GFP_KERNEL); - - if (!r_buffer) - return -ENOMEM; - - tr.rx_buf = r_buffer; - dev_dbg(&spi->dev, "Request writing %d bytes\n", len); - - memset(&msg, 0, sizeof(msg)); - spi_message_init(&msg); - msg.spi = spi; - msg.is_dma_mapped = USE_SPI_DMA; - spi_message_add_tail(&tr, &msg); - - ret = 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 = -EINVAL; - } - - return ret; -} - -static int wilc_spi_rx(struct wilc *wilc, u8 *rb, u32 rlen) -{ - struct spi_device *spi = to_spi_device(wilc->dev); - int ret; - - if (rlen > 0) { - struct spi_message msg; - struct spi_transfer tr = { - .rx_buf = rb, - .len = rlen, - .delay = { - .value = 0, - .unit = SPI_DELAY_UNIT_USECS - }, - - }; - char *t_buffer = kzalloc(rlen, GFP_KERNEL); - - if (!t_buffer) - return -ENOMEM; - - tr.tx_buf = t_buffer; - - memset(&msg, 0, sizeof(msg)); - spi_message_init(&msg); - msg.spi = spi; - msg.is_dma_mapped = USE_SPI_DMA; - spi_message_add_tail(&tr, &msg); - - ret = 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 = -EINVAL; - } - - return ret; -} - -static int wilc_spi_tx_rx(struct wilc *wilc, u8 *wb, u8 *rb, u32 rlen) -{ - struct spi_device *spi = to_spi_device(wilc->dev); - int ret; - - if (rlen > 0) { - struct spi_message msg; - struct spi_transfer tr = { - .rx_buf = rb, - .tx_buf = wb, - .len = rlen, - .bits_per_word = 8, - .delay = { - .value = 0, - .unit = SPI_DELAY_UNIT_USECS - }, - - }; - - memset(&msg, 0, sizeof(msg)); - spi_message_init(&msg); - msg.spi = spi; - msg.is_dma_mapped = USE_SPI_DMA; - - spi_message_add_tail(&tr, &msg); - ret = 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 = -EINVAL; - } - - return ret; -} - -static int spi_data_write(struct wilc *wilc, u8 *b, u32 sz) -{ - struct spi_device *spi = to_spi_device(wilc->dev); - struct wilc_spi *spi_priv = wilc->bus_data; - int ix, nbytes; - int result = 0; - u8 cmd, order, crc[2] = {0}; - - /* - * Data - */ - ix = 0; - do { - if (sz <= DATA_PKT_SZ) { - nbytes = sz; - order = 0x3; - } else { - nbytes = DATA_PKT_SZ; - if (ix == 0) - order = 0x1; - else - order = 0x02; - } - - /* - * Write command - */ - cmd = 0xf0; - cmd |= order; - - if (wilc_spi_tx(wilc, &cmd, 1)) { - dev_err(&spi->dev, - "Failed data block cmd write, bus error...\n"); - result = -EINVAL; - break; - } - - /* - * Write data - */ - if (wilc_spi_tx(wilc, &b[ix], nbytes)) { - dev_err(&spi->dev, - "Failed data block write, bus error...\n"); - result = -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 = -EINVAL; - break; - } - } - - /* - * No need to wait for response - */ - ix += nbytes; - sz -= 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 = to_spi_device(wilc->dev); - struct wilc_spi *spi_priv = 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 = (struct wilc_spi_cmd *)wb; - c->cmd_type = cmd; - if (cmd == CMD_SINGLE_READ) { - c->u.simple_cmd.addr[0] = adr >> 16; - c->u.simple_cmd.addr[1] = adr >> 8; - c->u.simple_cmd.addr[2] = adr; - } else if (cmd == CMD_INTERNAL_READ) { - c->u.simple_cmd.addr[0] = adr >> 8; - if (clockless == 1) - c->u.simple_cmd.addr[0] |= BIT(7); - c->u.simple_cmd.addr[1] = adr; - c->u.simple_cmd.addr[2] = 0x0; - } else { - dev_err(&spi->dev, "cmd [%x] not supported\n", cmd); - return -EINVAL; - } - - cmd_len = offsetof(struct wilc_spi_cmd, u.simple_cmd.crc); - resp_len = sizeof(*r); - if (!spi_priv->crc_off) { - c->u.simple_cmd.crc[0] = wilc_get_crc7(wb, cmd_len); - cmd_len += 1; - resp_len += 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 = (struct wilc_spi_read_rsp_data *)&rb[cmd_len]; - if (r->rsp_cmd_type != cmd) { - dev_err(&spi->dev, - "Failed cmd response, cmd (%02x), resp (%02x)\n", - cmd, r->rsp_cmd_type); - return -EINVAL; - } - - if (r->status != 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) != 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 = to_spi_device(wilc->dev); - struct wilc_spi *spi_priv = 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 = (struct wilc_spi_cmd *)wb; - c->cmd_type = cmd; - if (cmd == CMD_INTERNAL_WRITE) { - c->u.internal_w_cmd.addr[0] = adr >> 8; - if (clockless == 1) - c->u.internal_w_cmd.addr[0] |= BIT(7); - - c->u.internal_w_cmd.addr[1] = adr; - c->u.internal_w_cmd.data = cpu_to_be32(data); - cmd_len = offsetof(struct wilc_spi_cmd, u.internal_w_cmd.crc); - if (!spi_priv->crc_off) - c->u.internal_w_cmd.crc[0] = wilc_get_crc7(wb, cmd_len); - } else if (cmd == CMD_SINGLE_WRITE) { - c->u.w_cmd.addr[0] = adr >> 16; - c->u.w_cmd.addr[1] = adr >> 8; - c->u.w_cmd.addr[2] = adr; - c->u.w_cmd.data = cpu_to_be32(data); - cmd_len = offsetof(struct wilc_spi_cmd, u.w_cmd.crc); - if (!spi_priv->crc_off) - c->u.w_cmd.crc[0] = 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 += 1; - - resp_len = 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 = (struct wilc_spi_rsp_data *)&rb[cmd_len]; - if (r->rsp_cmd_type != cmd) { - dev_err(&spi->dev, - "Failed cmd response, cmd (%02x), resp (%02x)\n", - cmd, r->rsp_cmd_type); - return -EINVAL; - } - - if (r->status != 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 = to_spi_device(wilc->dev); - struct wilc_spi *spi_priv = wilc->bus_data; - u8 wb[32], rb[32]; - int cmd_len, resp_len; - int retry, ix = 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 = (struct wilc_spi_cmd *)wb; - c->cmd_type = cmd; - if (cmd == CMD_DMA_WRITE || cmd == CMD_DMA_READ) { - c->u.dma_cmd.addr[0] = adr >> 16; - c->u.dma_cmd.addr[1] = adr >> 8; - c->u.dma_cmd.addr[2] = adr; - c->u.dma_cmd.size[0] = sz >> 8; - c->u.dma_cmd.size[1] = sz; - cmd_len = offsetof(struct wilc_spi_cmd, u.dma_cmd.crc); - if (!spi_priv->crc_off) - c->u.dma_cmd.crc[0] = wilc_get_crc7(wb, cmd_len); - } else if (cmd == CMD_DMA_EXT_WRITE || cmd == CMD_DMA_EXT_READ) { - c->u.dma_cmd_ext.addr[0] = adr >> 16; - c->u.dma_cmd_ext.addr[1] = adr >> 8; - c->u.dma_cmd_ext.addr[2] = adr; - c->u.dma_cmd_ext.size[0] = sz >> 16; - c->u.dma_cmd_ext.size[1] = sz >> 8; - c->u.dma_cmd_ext.size[2] = sz; - cmd_len = offsetof(struct wilc_spi_cmd, u.dma_cmd_ext.crc); - if (!spi_priv->crc_off) - c->u.dma_cmd_ext.crc[0] = 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 += 1; - - resp_len = 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 = (struct wilc_spi_rsp_data *)&rb[cmd_len]; - if (r->rsp_cmd_type != cmd) { - dev_err(&spi->dev, - "Failed cmd response, cmd (%02x), resp (%02x)\n", - cmd, r->rsp_cmd_type); - return -EINVAL; - } - - if (r->status != WILC_SPI_COMMAND_STAT_SUCCESS) { - dev_err(&spi->dev, "Failed cmd state response state (%02x)\n", - r->status); - return -EINVAL; - } - - if (cmd == CMD_DMA_WRITE || cmd == CMD_DMA_EXT_WRITE) - return 0; - - while (sz > 0) { - int nbytes; - u8 rsp; - - if (sz <= DATA_PKT_SZ) - nbytes = sz; - else - nbytes = DATA_PKT_SZ; - - /* - * Data Response header - */ - retry = 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) == 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 += nbytes; - sz -= nbytes; - } - return 0; -} - -static int wilc_spi_read_reg(struct wilc *wilc, u32 addr, u32 *data) -{ - struct spi_device *spi = to_spi_device(wilc->dev); - int result; - u8 cmd = CMD_SINGLE_READ; - u8 clockless = 0; - - if (addr < WILC_SPI_CLOCKLESS_ADDR_LIMIT) { - /* Clockless register */ - cmd = CMD_INTERNAL_READ; - clockless = 1; - } - - result = 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 = to_spi_device(wilc->dev); - int result; - - if (size <= 4) - return -EINVAL; - - result = 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 = to_spi_device(wilc->dev); - int result; - - result = 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 = to_spi_device(wilc->dev); - int result; - - result = 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 = to_spi_device(wilc->dev); - int result; - u8 cmd = CMD_SINGLE_WRITE; - u8 clockless = 0; - - if (addr < WILC_SPI_CLOCKLESS_ADDR_LIMIT) { - /* Clockless register */ - cmd = CMD_INTERNAL_WRITE; - clockless = 1; - } - - result = 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 = to_spi_device(wilc->dev); - int result; - - /* - * has to be greated than 4 - */ - if (size <= 4) - return -EINVAL; - - result = 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 = 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 = to_spi_device(wilc->dev); - struct wilc_spi *spi_priv = wilc->bus_data; - u32 reg; - u32 chipid; - static int isinit; - int ret; - - if (isinit) { - ret = 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 = 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 = 1; - dev_err(&spi->dev, - "Failed read with CRC on, retrying with CRC off\n"); - ret = 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 == 0) { - reg &= ~0xc; /* disable crc checking */ - reg &= ~0x70; - reg |= (0x5 << 4); - ret = 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 = 1; - } - - /* - * make sure can read back chip id correctly - */ - ret = wilc_spi_read_reg(wilc, WILC_CHIPID, &chipid); - if (ret) { - dev_err(&spi->dev, "Fail cmd read chip id...\n"); - return ret; - } - - isinit = 1; - - return 0; -} - -static int wilc_spi_read_size(struct wilc *wilc, u32 *size) -{ - int ret; - - ret = spi_internal_read(wilc, - WILC_SPI_INT_STATUS - WILC_SPI_REG_BASE, size); - *size = 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 = 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 = 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 |= BIT(8); - ret = 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 = 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 = 0; (i < 5) && (nint > 0); i++, nint--) - reg |= (BIT((27 + i))); - - ret = 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 = 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 = 0; (i < 3) && (nint > 0); i++, nint--) - reg |= BIT(i); - - ret = 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 = { - .hif_init = wilc_spi_init, - .hif_deinit = wilc_spi_deinit, - .hif_read_reg = wilc_spi_read_reg, - .hif_write_reg = wilc_spi_write_reg, - .hif_block_rx = wilc_spi_read, - .hif_block_tx = wilc_spi_write, - .hif_read_int = wilc_spi_read_int, - .hif_clear_int_ext = wilc_spi_clear_int_ext, - .hif_read_size = wilc_spi_read_size, - .hif_block_tx_ext = wilc_spi_write, - .hif_block_rx_ext = wilc_spi_read, - .hif_sync_ext = wilc_spi_sync_ext, -}; -- cgit v1.2.3