ipq806x: Add support for IPQ806x chip family

Patches are generated using the "format-patch" command from the
following location:
*https://www.codeaurora.org/cgit/quic/kernel/galak-msm/log/?h=apq_ipq_base
*rev=0771849495b4128cac2faf7d49c85c729fc48b20
Patches numbered 76/77/102/103 have already been integrated in 3.14.12,
so they're not in this list.

All these patches are either integrated are pending integration into
kernel.org, therefore these patches should go away once the kernel
gets upgraded to 3.16.

Support is currently limited to AP148 board but can be extended to other
platforms in the future.

These changes do not cover ethernet connectivity.

Signed-off-by: Mathieu Olivari <mathieu@codeaurora.org>

SVN-Revision: 42334

1 files changed, 341 insertions, 0 deletions

diff --git a/target/linux/ipq806x/patches/0114-ahci-platform-Library-ise-ahci_probe-functionality.patch b/target/linux/ipq806x/patches/0114-ahci-platform-Library-ise-ahci_probe-functionality.patch
new file mode 100644
index 0000000000..9b9c7afd47
--- /dev/null
+++ b/target/linux/ipq806x/patches/0114-ahci-platform-Library-ise-ahci_probe-functionality.patch
@@ -0,0 +1,341 @@
+From 8be4987340a101253fb871556894a002f1afb51f Mon Sep 17 00:00:00 2001
+From: Hans de Goede <hdegoede@redhat.com>
+Date: Sat, 22 Feb 2014 16:53:34 +0100
+Subject: [PATCH 114/182] ahci-platform: "Library-ise" ahci_probe
+ functionality
+
+ahci_probe consists of 3 steps:
+1) Get resources (get mmio, clks, regulator)
+2) Enable resources, handled by ahci_platform_enable_resouces
+3) The more or less standard ahci-host controller init sequence
+
+This commit refactors step 1 and 3 into separate functions, so the platform
+drivers for AHCI implementations which need a specific order in step 2,
+and / or need to do some custom register poking at some time, can re-use
+ahci-platform.c code without needing to copy and paste it.
+
+Note that ahci_platform_init_host's prototype takes the 3 non function
+members of ahci_platform_data as arguments, the idea is that drivers using
+the new exported utility functions will not use ahci_platform_data at all,
+and hopefully in the future ahci_platform_data can go away entirely.
+
+tj: Minor comment formatting updates.
+
+Signed-off-by: Hans de Goede <hdegoede@redhat.com>
+Signed-off-by: Tejun Heo <tj@kernel.org>
+---
+ drivers/ata/ahci_platform.c   |  188 +++++++++++++++++++++++++++--------------
+ include/linux/ahci_platform.h |   14 +++
+ 2 files changed, 137 insertions(+), 65 deletions(-)
+
+diff --git a/drivers/ata/ahci_platform.c b/drivers/ata/ahci_platform.c
+index a32df31..19e9eaa 100644
+--- a/drivers/ata/ahci_platform.c
++++ b/drivers/ata/ahci_platform.c
+@@ -188,64 +188,60 @@ void ahci_platform_disable_resources(struct ahci_host_priv *hpriv)
+ }
+ EXPORT_SYMBOL_GPL(ahci_platform_disable_resources);
+ 
+-static void ahci_put_clks(struct ahci_host_priv *hpriv)
++static void ahci_platform_put_resources(struct device *dev, void *res)
+ {
++	struct ahci_host_priv *hpriv = res;
+ 	int c;
+ 
+ 	for (c = 0; c < AHCI_MAX_CLKS && hpriv->clks[c]; c++)
+ 		clk_put(hpriv->clks[c]);
+ }
+ 
+-static int ahci_probe(struct platform_device *pdev)
++/**
++ * ahci_platform_get_resources - Get platform resources
++ * @pdev: platform device to get resources for
++ *
++ * This function allocates an ahci_host_priv struct, and gets the following
++ * resources, storing a reference to them inside the returned struct:
++ *
++ * 1) mmio registers (IORESOURCE_MEM 0, mandatory)
++ * 2) regulator for controlling the targets power (optional)
++ * 3) 0 - AHCI_MAX_CLKS clocks, as specified in the devs devicetree node,
++ *    or for non devicetree enabled platforms a single clock
++ *
++ * RETURNS:
++ * The allocated ahci_host_priv on success, otherwise an ERR_PTR value
++ */
++struct ahci_host_priv *ahci_platform_get_resources(
++	struct platform_device *pdev)
+ {
+ 	struct device *dev = &pdev->dev;
+-	struct ahci_platform_data *pdata = dev_get_platdata(dev);
+-	const struct platform_device_id *id = platform_get_device_id(pdev);
+-	struct ata_port_info pi = ahci_port_info[id ? id->driver_data : 0];
+-	const struct ata_port_info *ppi[] = { &pi, NULL };
+ 	struct ahci_host_priv *hpriv;
+-	struct ata_host *host;
+-	struct resource *mem;
+ 	struct clk *clk;
+-	int irq;
+-	int n_ports;
+-	int i;
+-	int rc;
++	int i, rc = -ENOMEM;
+ 
+-	mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+-	if (!mem) {
+-		dev_err(dev, "no mmio space\n");
+-		return -EINVAL;
+-	}
+-
+-	irq = platform_get_irq(pdev, 0);
+-	if (irq <= 0) {
+-		dev_err(dev, "no irq\n");
+-		return -EINVAL;
+-	}
++	if (!devres_open_group(dev, NULL, GFP_KERNEL))
++		return ERR_PTR(-ENOMEM);
+ 
+-	if (pdata && pdata->ata_port_info)
+-		pi = *pdata->ata_port_info;
+-
+-	hpriv = devm_kzalloc(dev, sizeof(*hpriv), GFP_KERNEL);
+-	if (!hpriv) {
+-		dev_err(dev, "can't alloc ahci_host_priv\n");
+-		return -ENOMEM;
+-	}
++	hpriv = devres_alloc(ahci_platform_put_resources, sizeof(*hpriv),
++			     GFP_KERNEL);
++	if (!hpriv)
++		goto err_out;
+ 
+-	hpriv->flags |= (unsigned long)pi.private_data;
++	devres_add(dev, hpriv);
+ 
+-	hpriv->mmio = devm_ioremap(dev, mem->start, resource_size(mem));
++	hpriv->mmio = devm_ioremap_resource(dev,
++			      platform_get_resource(pdev, IORESOURCE_MEM, 0));
+ 	if (!hpriv->mmio) {
+-		dev_err(dev, "can't map %pR\n", mem);
+-		return -ENOMEM;
++		dev_err(dev, "no mmio space\n");
++		goto err_out;
+ 	}
+ 
+ 	hpriv->target_pwr = devm_regulator_get_optional(dev, "target");
+ 	if (IS_ERR(hpriv->target_pwr)) {
+ 		rc = PTR_ERR(hpriv->target_pwr);
+ 		if (rc == -EPROBE_DEFER)
+-			return -EPROBE_DEFER;
++			goto err_out;
+ 		hpriv->target_pwr = NULL;
+ 	}
+ 
+@@ -264,33 +260,59 @@ static int ahci_probe(struct platform_device *pdev)
+ 		if (IS_ERR(clk)) {
+ 			rc = PTR_ERR(clk);
+ 			if (rc == -EPROBE_DEFER)
+-				goto free_clk;
++				goto err_out;
+ 			break;
+ 		}
+ 		hpriv->clks[i] = clk;
+ 	}
+ 
+-	rc = ahci_platform_enable_resources(hpriv);
+-	if (rc)
+-		goto free_clk;
++	devres_remove_group(dev, NULL);
++	return hpriv;
+ 
+-	/*
+-	 * Some platforms might need to prepare for mmio region access,
+-	 * which could be done in the following init call. So, the mmio
+-	 * region shouldn't be accessed before init (if provided) has
+-	 * returned successfully.
+-	 */
+-	if (pdata && pdata->init) {
+-		rc = pdata->init(dev, hpriv->mmio);
+-		if (rc)
+-			goto disable_resources;
+-	}
++err_out:
++	devres_release_group(dev, NULL);
++	return ERR_PTR(rc);
++}
++EXPORT_SYMBOL_GPL(ahci_platform_get_resources);
++
++/**
++ * ahci_platform_init_host - Bring up an ahci-platform host
++ * @pdev: platform device pointer for the host
++ * @hpriv: ahci-host private data for the host
++ * @pi_template: template for the ata_port_info to use
++ * @force_port_map: param passed to ahci_save_initial_config
++ * @mask_port_map: param passed to ahci_save_initial_config
++ *
++ * This function does all the usual steps needed to bring up an
++ * ahci-platform host, note any necessary resources (ie clks, phy, etc.)
++ * must be initialized / enabled before calling this.
++ *
++ * RETURNS:
++ * 0 on success otherwise a negative error code
++ */
++int ahci_platform_init_host(struct platform_device *pdev,
++			    struct ahci_host_priv *hpriv,
++			    const struct ata_port_info *pi_template,
++			    unsigned int force_port_map,
++			    unsigned int mask_port_map)
++{
++	struct device *dev = &pdev->dev;
++	struct ata_port_info pi = *pi_template;
++	const struct ata_port_info *ppi[] = { &pi, NULL };
++	struct ata_host *host;
++	int i, irq, n_ports, rc;
+ 
+-	ahci_save_initial_config(dev, hpriv,
+-		pdata ? pdata->force_port_map : 0,
+-		pdata ? pdata->mask_port_map  : 0);
++	irq = platform_get_irq(pdev, 0);
++	if (irq <= 0) {
++		dev_err(dev, "no irq\n");
++		return -EINVAL;
++	}
+ 
+ 	/* prepare host */
++	hpriv->flags |= (unsigned long)pi.private_data;
++
++	ahci_save_initial_config(dev, hpriv, force_port_map, mask_port_map);
++
+ 	if (hpriv->cap & HOST_CAP_NCQ)
+ 		pi.flags |= ATA_FLAG_NCQ;
+ 
+@@ -307,10 +329,8 @@ static int ahci_probe(struct platform_device *pdev)
+ 	n_ports = max(ahci_nr_ports(hpriv->cap), fls(hpriv->port_map));
+ 
+ 	host = ata_host_alloc_pinfo(dev, ppi, n_ports);
+-	if (!host) {
+-		rc = -ENOMEM;
+-		goto pdata_exit;
+-	}
++	if (!host)
++		return -ENOMEM;
+ 
+ 	host->private_data = hpriv;
+ 
+@@ -325,7 +345,8 @@ static int ahci_probe(struct platform_device *pdev)
+ 	for (i = 0; i < host->n_ports; i++) {
+ 		struct ata_port *ap = host->ports[i];
+ 
+-		ata_port_desc(ap, "mmio %pR", mem);
++		ata_port_desc(ap, "mmio %pR",
++			      platform_get_resource(pdev, IORESOURCE_MEM, 0));
+ 		ata_port_desc(ap, "port 0x%x", 0x100 + ap->port_no * 0x80);
+ 
+ 		/* set enclosure management message type */
+@@ -339,13 +360,53 @@ static int ahci_probe(struct platform_device *pdev)
+ 
+ 	rc = ahci_reset_controller(host);
+ 	if (rc)
+-		goto pdata_exit;
++		return rc;
+ 
+ 	ahci_init_controller(host);
+ 	ahci_print_info(host, "platform");
+ 
+-	rc = ata_host_activate(host, irq, ahci_interrupt, IRQF_SHARED,
+-			       &ahci_platform_sht);
++	return ata_host_activate(host, irq, ahci_interrupt, IRQF_SHARED,
++				 &ahci_platform_sht);
++}
++EXPORT_SYMBOL_GPL(ahci_platform_init_host);
++
++static int ahci_probe(struct platform_device *pdev)
++{
++	struct device *dev = &pdev->dev;
++	struct ahci_platform_data *pdata = dev_get_platdata(dev);
++	const struct platform_device_id *id = platform_get_device_id(pdev);
++	const struct ata_port_info *pi_template;
++	struct ahci_host_priv *hpriv;
++	int rc;
++
++	hpriv = ahci_platform_get_resources(pdev);
++	if (IS_ERR(hpriv))
++		return PTR_ERR(hpriv);
++
++	rc = ahci_platform_enable_resources(hpriv);
++	if (rc)
++		return rc;
++
++	/*
++	 * Some platforms might need to prepare for mmio region access,
++	 * which could be done in the following init call. So, the mmio
++	 * region shouldn't be accessed before init (if provided) has
++	 * returned successfully.
++	 */
++	if (pdata && pdata->init) {
++		rc = pdata->init(dev, hpriv->mmio);
++		if (rc)
++			goto disable_resources;
++	}
++
++	if (pdata && pdata->ata_port_info)
++		pi_template = pdata->ata_port_info;
++	else
++		pi_template = &ahci_port_info[id ? id->driver_data : 0];
++
++	rc = ahci_platform_init_host(pdev, hpriv, pi_template,
++				     pdata ? pdata->force_port_map : 0,
++				     pdata ? pdata->mask_port_map  : 0);
+ 	if (rc)
+ 		goto pdata_exit;
+ 
+@@ -355,8 +416,6 @@ pdata_exit:
+ 		pdata->exit(dev);
+ disable_resources:
+ 	ahci_platform_disable_resources(hpriv);
+-free_clk:
+-	ahci_put_clks(hpriv);
+ 	return rc;
+ }
+ 
+@@ -370,7 +429,6 @@ static void ahci_host_stop(struct ata_host *host)
+ 		pdata->exit(dev);
+ 
+ 	ahci_platform_disable_resources(hpriv);
+-	ahci_put_clks(hpriv);
+ }
+ 
+ #ifdef CONFIG_PM_SLEEP
+diff --git a/include/linux/ahci_platform.h b/include/linux/ahci_platform.h
+index b674b01..b80c51c 100644
+--- a/include/linux/ahci_platform.h
++++ b/include/linux/ahci_platform.h
+@@ -20,7 +20,14 @@
+ struct device;
+ struct ata_port_info;
+ struct ahci_host_priv;
++struct platform_device;
+ 
++/*
++ * Note ahci_platform_data is deprecated, it is only kept around for use
++ * by the old da850 and spear13xx ahci code.
++ * New drivers should instead declare their own platform_driver struct, and
++ * use ahci_platform* functions in their own probe, suspend and resume methods.
++ */
+ struct ahci_platform_data {
+ 	int (*init)(struct device *dev, void __iomem *addr);
+ 	void (*exit)(struct device *dev);
+@@ -35,5 +42,12 @@ int ahci_platform_enable_clks(struct ahci_host_priv *hpriv);
+ void ahci_platform_disable_clks(struct ahci_host_priv *hpriv);
+ int ahci_platform_enable_resources(struct ahci_host_priv *hpriv);
+ void ahci_platform_disable_resources(struct ahci_host_priv *hpriv);
++struct ahci_host_priv *ahci_platform_get_resources(
++	struct platform_device *pdev);
++int ahci_platform_init_host(struct platform_device *pdev,
++			    struct ahci_host_priv *hpriv,
++			    const struct ata_port_info *pi_template,
++			    unsigned int force_port_map,
++			    unsigned int mask_port_map);
+ 
+ #endif /* _AHCI_PLATFORM_H */
+-- 
+1.7.10.4
+