From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-6.0 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS, UNWANTED_LANGUAGE_BODY,URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id E6DCFC48BD6 for ; Tue, 25 Jun 2019 23:46:04 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id BF4EF2086D for ; Tue, 25 Jun 2019 23:46:04 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726523AbfFYXqE (ORCPT ); Tue, 25 Jun 2019 19:46:04 -0400 Received: from mail-out.m-online.net ([212.18.0.9]:59508 "EHLO mail-out.m-online.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726506AbfFYXqB (ORCPT ); Tue, 25 Jun 2019 19:46:01 -0400 Received: from frontend01.mail.m-online.net (unknown [192.168.8.182]) by mail-out.m-online.net (Postfix) with ESMTP id 45YN8R3qbrz1rMqd; Wed, 26 Jun 2019 01:45:59 +0200 (CEST) Received: from localhost (dynscan1.mnet-online.de [192.168.6.70]) by mail.m-online.net (Postfix) with ESMTP id 45YN8R3fZSz20V2L; Wed, 26 Jun 2019 01:45:59 +0200 (CEST) X-Virus-Scanned: amavisd-new at mnet-online.de Received: from mail.mnet-online.de ([192.168.8.182]) by localhost (dynscan1.mail.m-online.net [192.168.6.70]) (amavisd-new, port 10024) with ESMTP id HrM-kle9poGZ; Wed, 26 Jun 2019 01:45:58 +0200 (CEST) X-Auth-Info: 2VjdqB7Luf+lbhAzCDV9nm5/Y5srNI5Ba++In4HoSsM= Received: from kurokawa.lan (ip-86-49-110-70.net.upcbroadband.cz [86.49.110.70]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.mnet-online.de (Postfix) with ESMTPSA; Wed, 26 Jun 2019 01:45:58 +0200 (CEST) From: Marek Vasut To: netdev@vger.kernel.org Cc: Marek Vasut , Andrew Lunn , Florian Fainelli , Tristram Ha , Woojung Huh Subject: [PATCH V4 07/10] net: dsa: microchip: Initial SPI regmap support Date: Wed, 26 Jun 2019 01:43:45 +0200 Message-Id: <20190625234348.16246-8-marex@denx.de> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20190625234348.16246-1-marex@denx.de> References: <20190625234348.16246-1-marex@denx.de> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Sender: netdev-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org Add basic SPI regmap support into the driver. Previous patches unconver that ksz_spi_write() is always ever called with len = 1, 2 or 4. We can thus drop the if (len > SPI_TX_BUF_LEN) check and we can also drop the allocation of the txbuf which is part of the driver data and wastes 256 bytes for no reason. Regmap covers the whole thing now. Signed-off-by: Marek Vasut Cc: Andrew Lunn Cc: Florian Fainelli Cc: Tristram Ha Cc: Woojung Huh --- V2: - Squash with "net: dsa: microchip: Remove dev->txbuf" - Use separate regmaps for 8/16/32bit registers - Increase the regmap size to 0xd00 to cover the entire register area V3: - Rebase on next/master - Test on KSZ9477EVB - Increase regmap max register, to cover all switch registers - Correct regmap reg_bits value to match the hardware - Use cpu_to_be32() instead of cpu_to_le16() in register masks, since the KSZ9477 has some 32bit registers. V4: - Replace cpu_to_be32() with swab32() in regmap read/write_flag_masks. - Move REGMAP_SPI to NET_DSA_MICROCHIP_KSZ9477_SPI in Kconfig --- drivers/net/dsa/microchip/Kconfig | 1 + drivers/net/dsa/microchip/ksz9477_spi.c | 114 +++++++++++------------- drivers/net/dsa/microchip/ksz_priv.h | 3 +- 3 files changed, 52 insertions(+), 66 deletions(-) diff --git a/drivers/net/dsa/microchip/Kconfig b/drivers/net/dsa/microchip/Kconfig index 2c3a6751bdaf..fe0a13b79c4b 100644 --- a/drivers/net/dsa/microchip/Kconfig +++ b/drivers/net/dsa/microchip/Kconfig @@ -13,5 +13,6 @@ menuconfig NET_DSA_MICROCHIP_KSZ9477 config NET_DSA_MICROCHIP_KSZ9477_SPI tristate "KSZ9477 series SPI connected switch driver" depends on NET_DSA_MICROCHIP_KSZ9477 && SPI + select REGMAP_SPI help Select to enable support for registering switches configured through SPI. diff --git a/drivers/net/dsa/microchip/ksz9477_spi.c b/drivers/net/dsa/microchip/ksz9477_spi.c index 49aeb92d36fc..c72645354dc2 100644 --- a/drivers/net/dsa/microchip/ksz9477_spi.c +++ b/drivers/net/dsa/microchip/ksz9477_spi.c @@ -10,78 +10,54 @@ #include #include #include +#include #include #include "ksz_priv.h" -/* SPI frame opcodes */ -#define KS_SPIOP_RD 3 -#define KS_SPIOP_WR 2 - #define SPI_ADDR_SHIFT 24 -#define SPI_ADDR_MASK (BIT(SPI_ADDR_SHIFT) - 1) +#define SPI_ADDR_ALIGN 3 #define SPI_TURNAROUND_SHIFT 5 -/* Enough to read all switch port registers. */ -#define SPI_TX_BUF_LEN 0x100 - -static u32 ksz9477_spi_cmd(u32 reg, bool read) -{ - u32 txbuf; - - txbuf = reg & SPI_ADDR_MASK; - txbuf |= (read ? KS_SPIOP_RD : KS_SPIOP_WR) << SPI_ADDR_SHIFT; - txbuf <<= SPI_TURNAROUND_SHIFT; - txbuf = cpu_to_be32(txbuf); - - return txbuf; -} - -static int ksz9477_spi_read_reg(struct spi_device *spi, u32 reg, u8 *val, - unsigned int len) -{ - u32 txbuf = ksz9477_spi_cmd(reg, true); - - return spi_write_then_read(spi, &txbuf, 4, val, len); -} - -static int ksz9477_spi_write_reg(struct spi_device *spi, u32 reg, u8 *val, - unsigned int len) -{ - u32 *txbuf = (u32 *)val; - - *txbuf = ksz9477_spi_cmd(reg, false); - - return spi_write(spi, txbuf, 4 + len); -} - -static int ksz_spi_read(struct ksz_device *dev, u32 reg, u8 *data, - unsigned int len) -{ - struct spi_device *spi = dev->priv; - - return ksz9477_spi_read_reg(spi, reg, data, len); -} - -static int ksz_spi_write(struct ksz_device *dev, u32 reg, void *data, - unsigned int len) -{ - struct spi_device *spi = dev->priv; +/* SPI frame opcodes */ +#define KS_SPIOP_RD 3 +#define KS_SPIOP_WR 2 - if (len > SPI_TX_BUF_LEN) - len = SPI_TX_BUF_LEN; - memcpy(&dev->txbuf[4], data, len); - return ksz9477_spi_write_reg(spi, reg, dev->txbuf, len); -} +#define KS_SPIOP_FLAG_MASK(opcode) \ + swab32((opcode) << (SPI_ADDR_SHIFT + SPI_TURNAROUND_SHIFT)) + +#define KSZ_REGMAP_COMMON(width) \ + { \ + .val_bits = (width), \ + .reg_stride = (width) / 8, \ + .reg_bits = SPI_ADDR_SHIFT + SPI_ADDR_ALIGN, \ + .pad_bits = SPI_TURNAROUND_SHIFT, \ + .max_register = BIT(SPI_ADDR_SHIFT) - 1, \ + .cache_type = REGCACHE_NONE, \ + .read_flag_mask = KS_SPIOP_FLAG_MASK(KS_SPIOP_RD), \ + .write_flag_mask = KS_SPIOP_FLAG_MASK(KS_SPIOP_WR), \ + .reg_format_endian = REGMAP_ENDIAN_BIG, \ + .val_format_endian = REGMAP_ENDIAN_BIG \ + } + +static const struct regmap_config ksz9477_regmap_config[] = { + KSZ_REGMAP_COMMON(8), + KSZ_REGMAP_COMMON(16), + KSZ_REGMAP_COMMON(32), +}; static int ksz_spi_read8(struct ksz_device *dev, u32 reg, u8 *val) { - return ksz_spi_read(dev, reg, val, 1); + unsigned int value; + int ret = regmap_read(dev->regmap, reg, &value); + + *val = value; + return ret; } static int ksz_spi_read16(struct ksz_device *dev, u32 reg, u16 *val) { - int ret = ksz_spi_read(dev, reg, (u8 *)val, 2); + int ret = regmap_bulk_read(dev->regmap, reg, val, 2); if (!ret) *val = be16_to_cpu(*val); @@ -91,7 +67,7 @@ static int ksz_spi_read16(struct ksz_device *dev, u32 reg, u16 *val) static int ksz_spi_read32(struct ksz_device *dev, u32 reg, u32 *val) { - int ret = ksz_spi_read(dev, reg, (u8 *)val, 4); + int ret = regmap_bulk_read(dev->regmap, reg, val, 4); if (!ret) *val = be32_to_cpu(*val); @@ -101,19 +77,19 @@ static int ksz_spi_read32(struct ksz_device *dev, u32 reg, u32 *val) static int ksz_spi_write8(struct ksz_device *dev, u32 reg, u8 value) { - return ksz_spi_write(dev, reg, &value, 1); + return regmap_write(dev->regmap, reg, value); } static int ksz_spi_write16(struct ksz_device *dev, u32 reg, u16 value) { value = cpu_to_be16(value); - return ksz_spi_write(dev, reg, &value, 2); + return regmap_bulk_write(dev->regmap, reg, &value, 2); } static int ksz_spi_write32(struct ksz_device *dev, u32 reg, u32 value) { value = cpu_to_be32(value); - return ksz_spi_write(dev, reg, &value, 4); + return regmap_bulk_write(dev->regmap, reg, &value, 4); } static const struct ksz_io_ops ksz9477_spi_ops = { @@ -128,17 +104,27 @@ static const struct ksz_io_ops ksz9477_spi_ops = { static int ksz9477_spi_probe(struct spi_device *spi) { struct ksz_device *dev; - int ret; + int i, ret; dev = ksz_switch_alloc(&spi->dev, &ksz9477_spi_ops, spi); if (!dev) return -ENOMEM; + for (i = 0; i < ARRAY_SIZE(ksz9477_regmap_config); i++) { + dev->regmap[i] = devm_regmap_init_spi(spi, + &ksz9477_regmap_config[i]); + if (IS_ERR(dev->regmap[i])) { + ret = PTR_ERR(dev->regmap[i]); + dev_err(&spi->dev, + "Failed to initialize regmap%i: %d\n", + ksz9477_regmap_config[i].val_bits, ret); + return ret; + } + } + if (spi->dev.platform_data) dev->pdata = spi->dev.platform_data; - dev->txbuf = devm_kzalloc(dev->dev, 4 + SPI_TX_BUF_LEN, GFP_KERNEL); - ret = ksz9477_switch_register(dev); /* Main DSA driver may not be started yet. */ diff --git a/drivers/net/dsa/microchip/ksz_priv.h b/drivers/net/dsa/microchip/ksz_priv.h index d3ddf98156bb..5ccc633fc766 100644 --- a/drivers/net/dsa/microchip/ksz_priv.h +++ b/drivers/net/dsa/microchip/ksz_priv.h @@ -57,6 +57,7 @@ struct ksz_device { const struct ksz_dev_ops *dev_ops; struct device *dev; + struct regmap *regmap[3]; void *priv; @@ -82,8 +83,6 @@ struct ksz_device { struct vlan_table *vlan_cache; - u8 *txbuf; - struct ksz_port *ports; struct timer_list mib_read_timer; struct work_struct mib_read; -- 2.20.1