From mboxrd@z Thu Jan 1 00:00:00 1970 Return-path: Received: from mail-pg0-x244.google.com ([2607:f8b0:400e:c05::244]) by bombadil.infradead.org with esmtps (Exim 4.90_1 #2 (Red Hat Linux)) id 1fLGLb-0000F8-G3 for barebox@lists.infradead.org; Tue, 22 May 2018 23:05:42 +0000 Received: by mail-pg0-x244.google.com with SMTP id u7-v6so948pgp.3 for ; Tue, 22 May 2018 16:05:29 -0700 (PDT) From: Andrey Smirnov Date: Tue, 22 May 2018 16:05:12 -0700 Message-Id: <20180522230518.9070-2-andrew.smirnov@gmail.com> In-Reply-To: <20180522230518.9070-1-andrew.smirnov@gmail.com> References: <20180522230518.9070-1-andrew.smirnov@gmail.com> List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "barebox" Errors-To: barebox-bounces+u.kleine-koenig=pengutronix.de@lists.infradead.org Subject: [PATCH 1/7] i.MX: ocotp: Unify code paths for reading MAC address To: barebox@lists.infradead.org Cc: Andrey Smirnov , Vivien Didelot There is no reason why code handling MAC-address properties of "ocotp0" and code fetching this information to pass it along to networking subsystem couldn't share majority of their code. Convert the driver to do that. Cc: Vivien Didelot Tested-by: Vivien Didelot Signed-off-by: Andrey Smirnov --- arch/arm/mach-imx/include/mach/ocotp.h | 15 +++- arch/arm/mach-imx/ocotp.c | 112 +++++++++++-------------- 2 files changed, 65 insertions(+), 62 deletions(-) diff --git a/arch/arm/mach-imx/include/mach/ocotp.h b/arch/arm/mach-imx/include/mach/ocotp.h index 5474c27ed..b53000b16 100644 --- a/arch/arm/mach-imx/include/mach/ocotp.h +++ b/arch/arm/mach-imx/include/mach/ocotp.h @@ -1,9 +1,22 @@ #ifndef __MACH_IMX_OCOTP_H #define __MACH_IMX_OCOTP_H +#define OCOTP_SHADOW_OFFSET 0x400 +#define OCOTP_SHADOW_SPACING 0x10 + +/* + * Trivial shadow register offset -> ocotp register index. + * + * NOTE: Doesn't handle special mapping quirks. See + * imx6q_addr_to_offset and vf610_addr_to_offset for more details. Use + * with care + */ +#define OCOTP_OFFSET_TO_INDEX(o) \ + (((o) - OCOTP_SHADOW_OFFSET) / OCOTP_SHADOW_SPACING) + #define OCOTP_WORD_MASK_WIDTH 8 #define OCOTP_WORD_MASK_SHIFT 0 -#define OCOTP_WORD(n) ((((n) - 0x400) >> 4) & ((1 << OCOTP_WORD_MASK_WIDTH) - 1)) +#define OCOTP_WORD(n) (OCOTP_OFFSET_TO_INDEX(n) & ((1 << OCOTP_WORD_MASK_WIDTH) - 1)) #define OCOTP_BIT_MASK_WIDTH 5 #define OCOTP_BIT_MASK_SHIFT (OCOTP_WORD_MASK_SHIFT + OCOTP_WORD_MASK_WIDTH) diff --git a/arch/arm/mach-imx/ocotp.c b/arch/arm/mach-imx/ocotp.c index 99b365aad..d5e6b3d3e 100644 --- a/arch/arm/mach-imx/ocotp.c +++ b/arch/arm/mach-imx/ocotp.c @@ -66,6 +66,8 @@ #define BF(value, field) (((value) << field) & field##_MASK) +#define OCOTP_OFFSET_TO_ADDR(o) (OCOTP_OFFSET_TO_INDEX(o) * 4) + /* Other definitions */ #define IMX6_OTP_DATA_ERROR_VAL 0xBADABADA #define DEF_RELAX 20 @@ -366,55 +368,6 @@ bool imx_ocotp_sense_enable(bool enable) return old_value; } -static uint32_t inc_offset(uint32_t offset) -{ - if ((offset & 0x3) == 0x3) - return offset + 0xd; - else - return offset + 1; -} - -static void imx_ocotp_init_dt(struct device_d *dev, void __iomem *base) -{ - char mac[6]; - const __be32 *prop; - struct device_node *node = dev->device_node; - int len; - - if (!node) - return; - - prop = of_get_property(node, "barebox,provide-mac-address", &len); - if (!prop) - return; - - while (len >= MAC_ADDRESS_PROPLEN) { - struct device_node *rnode; - uint32_t phandle, offset; - - phandle = be32_to_cpup(prop++); - - rnode = of_find_node_by_phandle(phandle); - offset = be32_to_cpup(prop++); - - mac[5] = readb(base + offset); - offset = inc_offset(offset); - mac[4] = readb(base + offset); - offset = inc_offset(offset); - mac[3] = readb(base + offset); - offset = inc_offset(offset); - mac[2] = readb(base + offset); - offset = inc_offset(offset); - mac[1] = readb(base + offset); - offset = inc_offset(offset); - mac[0] = readb(base + offset); - - of_eth_register_ethaddr(rnode, mac); - - len -= MAC_ADDRESS_PROPLEN; - } -} - static void memreverse(void *dest, const void *src, size_t n) { char *destp = dest; @@ -424,21 +377,28 @@ static void memreverse(void *dest, const void *src, size_t n) *destp++ = *srcp--; } -static int imx_ocotp_get_mac(struct param_d *param, void *priv) +static int imx_ocotp_read_mac(struct regmap *map, unsigned int offset, + u8 mac[]) { - char buf[MAC_BYTES]; + u8 buf[MAC_BYTES]; int ret; - struct ocotp_priv_ethaddr *ethaddr = priv; - ret = regmap_bulk_read(ethaddr->map, ethaddr->offset, - buf, MAC_BYTES); + ret = regmap_bulk_read(map, offset, buf, MAC_BYTES); if (ret < 0) return ret; - memreverse(ethaddr->value, buf, 6); + memreverse(mac, buf, 6); return 0; } +static int imx_ocotp_get_mac(struct param_d *param, void *priv) +{ + struct ocotp_priv_ethaddr *ethaddr = priv; + + return imx_ocotp_read_mac(ethaddr->map, ethaddr->offset, + ethaddr->value); +} + static int imx_ocotp_set_mac(struct param_d *param, void *priv) { char buf[MAC_BYTES]; @@ -455,10 +415,41 @@ static struct regmap_bus imx_ocotp_regmap_bus = { .reg_read = imx_ocotp_reg_read, }; +static void imx_ocotp_init_dt(struct ocotp_priv *priv) +{ + char mac[MAC_BYTES]; + const __be32 *prop; + struct device_node *node = priv->dev.parent->device_node; + int len; + + if (!node) + return; + + prop = of_get_property(node, "barebox,provide-mac-address", &len); + if (!prop) + return; + + for (; len >= MAC_ADDRESS_PROPLEN; len -= MAC_ADDRESS_PROPLEN) { + struct device_node *rnode; + uint32_t phandle, offset; + + phandle = be32_to_cpup(prop++); + + rnode = of_find_node_by_phandle(phandle); + offset = be32_to_cpup(prop++); + + if (imx_ocotp_read_mac(priv->map, + OCOTP_OFFSET_TO_ADDR(offset), + mac)) + continue; + + of_eth_register_ethaddr(rnode, mac); + } +} + static int imx_ocotp_probe(struct device_d *dev) { struct resource *iores; - void __iomem *base; struct ocotp_priv *priv; int ret = 0; const struct imx_ocotp_data *data; @@ -470,14 +461,11 @@ static int imx_ocotp_probe(struct device_d *dev) iores = dev_request_mem_resource(dev, 0); if (IS_ERR(iores)) return PTR_ERR(iores); - base = IOMEM(iores->start); - - imx_ocotp_init_dt(dev, base); priv = xzalloc(sizeof(*priv)); priv->data = data; - priv->base = base; + priv->base = IOMEM(iores->start); priv->clk = clk_get(dev, NULL); if (IS_ERR(priv->clk)) return PTR_ERR(priv->clk); @@ -529,6 +517,8 @@ static int imx_ocotp_probe(struct device_d *dev) ethaddr->value, ethaddr); } + imx_ocotp_init_dt(priv); + dev_add_param_bool(&(priv->dev), "sense_enable", NULL, NULL, &priv->sense_enable, priv); return 0; @@ -536,7 +526,7 @@ static int imx_ocotp_probe(struct device_d *dev) static u32 imx6sl_addr_to_offset(u32 addr) { - return 0x400 + addr * 0x10; + return OCOTP_SHADOW_OFFSET + addr * OCOTP_SHADOW_SPACING; } static u32 imx6q_addr_to_offset(u32 addr) -- 2.17.0 _______________________________________________ barebox mailing list barebox@lists.infradead.org http://lists.infradead.org/mailman/listinfo/barebox