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bcm53xx: use bcma callback in SPROM driver to fill the SPROM
This is required because it has to be called at very precise moment. See comment in driver for details. Signed-off-by: Rafał Miłecki <zajec5@gmail.com> SVN-Revision: 43611
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@ -24,6 +24,7 @@
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#include <linux/of_platform.h>
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#include <linux/io.h>
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#include <linux/ssb/ssb.h>
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#include <linux/bcma/bcma.h>
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#include <linux/bcm47xx_nvram.h>
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#include <linux/if_ether.h>
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#include <linux/etherdevice.h>
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@ -640,21 +641,26 @@ static int bcm47xx_sprom_getenv(const struct bcm47xx_sprom_fill *fill,
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return bcm47xx_nvram_getenv(name, val, val_len);
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};
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static int bcm47xx_sprom_probe(struct platform_device *pdev)
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/* FIXME: This should not be static, but some callback argument */
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static struct platform_device *sprom_pdev = NULL;
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/*
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* This function has to be called in a very precise moment. It has to be done:
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* 1) After bcma registers flash cores, so we can read NVRAM.
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* 2) Before any code needs SPROM content.
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*
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* This can be achieved only by using bcma callback.
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*/
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static int bcm47xx_sprom_init(struct bcma_bus *bus, struct ssb_sprom *out)
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{
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struct platform_device *pdev = sprom_pdev;
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struct device *dev = &pdev->dev;
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struct device_node *np = dev->of_node;
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struct ssb_sprom *sprom;
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const __be32 *handle;
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struct device_node *nvram_node;
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struct platform_device *nvram_dev;
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struct bcm47xx_sprom_fill fill;
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/* Alloc */
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sprom = devm_kzalloc(dev, sizeof(*sprom), GFP_KERNEL);
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if (!sprom)
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return -ENOMEM;
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handle = of_get_property(np, "nvram", NULL);
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if (!handle)
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return -ENOMEM;
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@ -673,11 +679,17 @@ static int bcm47xx_sprom_probe(struct platform_device *pdev)
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fill.getenv = bcm47xx_sprom_getenv;
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fill.priv = nvram_dev;
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bcm47xx_sprom_fill(sprom, &fill);
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platform_set_drvdata(pdev, sprom);
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bcm47xx_sprom_fill(out, &fill);
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return 0;
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};
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static int bcm47xx_sprom_probe(struct platform_device *pdev)
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{
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/* This is the only way to make pdev accessible to the callback */
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sprom_pdev = pdev;
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return bcma_arch_register_fallback_sprom(&bcm47xx_sprom_init);
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}
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static const struct of_device_id bcm47xx_sprom_of_match_table[] = {
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@ -1,88 +0,0 @@
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From bd9106f5907080b467026bdaaea979fac8c7badb Mon Sep 17 00:00:00 2001
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From: Hauke Mehrtens <hauke@hauke-m.de>
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Date: Sun, 4 May 2014 14:34:31 +0200
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Subject: [PATCH 06/17] bcma: get sprom from devicetree
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This patch make it possible to device an sprom provider in device tree
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and get the sprom from this driver. Every time there is such a provider
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it gets asked for a sprom.
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Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
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---
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drivers/bcma/sprom.c | 51 ++++++++++++++++++++++++++++++++++++++++++++++++++-
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1 file changed, 50 insertions(+), 1 deletion(-)
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--- a/drivers/bcma/sprom.c
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+++ b/drivers/bcma/sprom.c
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@@ -15,6 +15,8 @@
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#include <linux/io.h>
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#include <linux/dma-mapping.h>
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#include <linux/slab.h>
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+#include <linux/of.h>
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+#include <linux/of_platform.h>
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static int(*get_fallback_sprom)(struct bcma_bus *dev, struct ssb_sprom *out);
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@@ -46,6 +48,46 @@ int bcma_arch_register_fallback_sprom(in
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return 0;
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}
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+#ifdef CONFIG_OF
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+static int bcma_fill_sprom_with_dt(struct bcma_bus *bus,
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+ struct ssb_sprom *out)
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+{
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+ const __be32 *handle;
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+ struct device_node *sprom_node;
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+ struct platform_device *sprom_dev;
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+ struct ssb_sprom *sprom;
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+
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+ if (!bus->host_pdev || !bus->host_pdev->dev.of_node)
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+ return -ENOENT;
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+
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+ handle = of_get_property(bus->host_pdev->dev.of_node, "sprom", NULL);
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+ if (!handle)
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+ return -ENOENT;
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+
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+ sprom_node = of_find_node_by_phandle(be32_to_cpup(handle));
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+ if (!sprom_node)
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+ return -ENOENT;
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+
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+ sprom_dev = of_find_device_by_node(sprom_node);
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+ if (!sprom_dev)
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+ return -ENOENT;
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+
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+ sprom = platform_get_drvdata(sprom_dev);
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+ if (!sprom)
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+ return -ENOENT;
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+
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+ memcpy(out, sprom, sizeof(*out));
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+
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+ return 0;
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+}
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+#else
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+static int bcma_fill_sprom_with_dt(struct bcma_bus *bus,
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+ struct ssb_sprom *out)
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+{
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+ return -ENOENT;
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+}
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+#endif
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+
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static int bcma_fill_sprom_with_fallback(struct bcma_bus *bus,
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struct ssb_sprom *out)
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{
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@@ -580,7 +622,14 @@ int bcma_sprom_get(struct bcma_bus *bus)
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u16 *sprom;
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size_t sprom_sizes[] = { SSB_SPROMSIZE_WORDS_R4,
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SSB_SPROMSIZE_WORDS_R10, };
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- int i, err = 0;
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+ int i, err;
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+
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+ err = bcma_fill_sprom_with_dt(bus, &bus->sprom);
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+ if (err == 0) {
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+ bcma_info(bus, "Found sprom from device tree provider\n");
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+ return 0;
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+ }
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+ err = 0;
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if (!bus->drv_cc.core)
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return -EOPNOTSUPP;
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@ -1,88 +0,0 @@
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From bd9106f5907080b467026bdaaea979fac8c7badb Mon Sep 17 00:00:00 2001
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From: Hauke Mehrtens <hauke@hauke-m.de>
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Date: Sun, 4 May 2014 14:34:31 +0200
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Subject: [PATCH 06/17] bcma: get sprom from devicetree
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This patch make it possible to device an sprom provider in device tree
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and get the sprom from this driver. Every time there is such a provider
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it gets asked for a sprom.
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Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
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---
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drivers/bcma/sprom.c | 51 ++++++++++++++++++++++++++++++++++++++++++++++++++-
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1 file changed, 50 insertions(+), 1 deletion(-)
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--- a/drivers/bcma/sprom.c
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+++ b/drivers/bcma/sprom.c
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@@ -15,6 +15,8 @@
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#include <linux/io.h>
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#include <linux/dma-mapping.h>
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#include <linux/slab.h>
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+#include <linux/of.h>
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+#include <linux/of_platform.h>
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static int(*get_fallback_sprom)(struct bcma_bus *dev, struct ssb_sprom *out);
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@@ -46,6 +48,46 @@ int bcma_arch_register_fallback_sprom(in
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return 0;
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}
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+#ifdef CONFIG_OF
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+static int bcma_fill_sprom_with_dt(struct bcma_bus *bus,
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+ struct ssb_sprom *out)
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+{
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+ const __be32 *handle;
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+ struct device_node *sprom_node;
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+ struct platform_device *sprom_dev;
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+ struct ssb_sprom *sprom;
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+
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+ if (!bus->host_pdev || !bus->host_pdev->dev.of_node)
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+ return -ENOENT;
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+
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+ handle = of_get_property(bus->host_pdev->dev.of_node, "sprom", NULL);
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+ if (!handle)
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+ return -ENOENT;
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+
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+ sprom_node = of_find_node_by_phandle(be32_to_cpup(handle));
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+ if (!sprom_node)
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+ return -ENOENT;
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+
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+ sprom_dev = of_find_device_by_node(sprom_node);
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+ if (!sprom_dev)
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+ return -ENOENT;
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+
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+ sprom = platform_get_drvdata(sprom_dev);
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+ if (!sprom)
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+ return -ENOENT;
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+
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+ memcpy(out, sprom, sizeof(*out));
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+
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+ return 0;
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+}
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+#else
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+static int bcma_fill_sprom_with_dt(struct bcma_bus *bus,
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+ struct ssb_sprom *out)
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+{
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+ return -ENOENT;
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+}
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+#endif
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+
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static int bcma_fill_sprom_with_fallback(struct bcma_bus *bus,
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struct ssb_sprom *out)
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{
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@@ -580,7 +622,14 @@ int bcma_sprom_get(struct bcma_bus *bus)
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u16 *sprom;
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size_t sprom_sizes[] = { SSB_SPROMSIZE_WORDS_R4,
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SSB_SPROMSIZE_WORDS_R10, };
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- int i, err = 0;
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+ int i, err;
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+
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+ err = bcma_fill_sprom_with_dt(bus, &bus->sprom);
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+ if (err == 0) {
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+ bcma_info(bus, "Found sprom from device tree provider\n");
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+ return 0;
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+ }
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+ err = 0;
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if (!bus->drv_cc.core)
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return -EOPNOTSUPP;
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