[PATCH v7 08/15] ahci-imx: Port to library-ised ahci_platform
Hans de Goede
hdegoede at redhat.com
Sat Feb 22 10:53:37 EST 2014
This avoids the ugliness of creating a nested platform device from probe.
While moving it around anyways, move the mk6q phy init code from probe
to imx_sata_enable, as the phy needs to be re-initialized on resume too,
otherwise the drive won't be recognized after resume.
Tested on a wandboard i.mx6 quad.
Signed-off-by: Hans de Goede <hdegoede at redhat.com>
---
.../devicetree/bindings/ata/ahci-platform.txt | 9 +-
drivers/ata/ahci_imx.c | 331 ++++++++-------------
2 files changed, 134 insertions(+), 206 deletions(-)
diff --git a/Documentation/devicetree/bindings/ata/ahci-platform.txt b/Documentation/devicetree/bindings/ata/ahci-platform.txt
index 499bfed..d86e854 100644
--- a/Documentation/devicetree/bindings/ata/ahci-platform.txt
+++ b/Documentation/devicetree/bindings/ata/ahci-platform.txt
@@ -5,8 +5,9 @@ Each SATA controller should have its own node.
Required properties:
- compatible : compatible list, one of "snps,spear-ahci",
- "snps,exynos5440-ahci", "ibm,476gtr-ahci", or
- "allwinner,sun4i-a10-ahci"
+ "snps,exynos5440-ahci", "ibm,476gtr-ahci",
+ "allwinner,sun4i-a10-ahci", "fsl,imx53-ahci" or
+ "fsl,imx6q-ahci"
- interrupts : <interrupt mapping for SATA IRQ>
- reg : <registers mapping>
@@ -15,6 +16,10 @@ Optional properties:
- clocks : a list of phandle + clock specifier pairs
- target-supply : regulator for SATA target power
+"fsl,imx53-ahci", "fsl,imx6q-ahci" required properties:
+- clocks : must contain the sata, sata_ref and ahb clocks
+- clock-names : must contain "ahb" for the ahb clock
+
Examples:
sata at ffe08000 {
compatible = "snps,spear-ahci";
diff --git a/drivers/ata/ahci_imx.c b/drivers/ata/ahci_imx.c
index dd4d6f7..3cb5d69 100644
--- a/drivers/ata/ahci_imx.c
+++ b/drivers/ata/ahci_imx.c
@@ -42,13 +42,7 @@ enum ahci_imx_type {
struct imx_ahci_priv {
struct platform_device *ahci_pdev;
enum ahci_imx_type type;
-
- /* i.MX53 clock */
- struct clk *sata_gate_clk;
- /* Common clock */
- struct clk *sata_ref_clk;
struct clk *ahb_clk;
-
struct regmap *gpr;
bool no_device;
bool first_time;
@@ -58,28 +52,52 @@ static int ahci_imx_hotplug;
module_param_named(hotplug, ahci_imx_hotplug, int, 0644);
MODULE_PARM_DESC(hotplug, "AHCI IMX hot-plug support (0=Don't support, 1=support)");
-static int imx_sata_clock_enable(struct device *dev)
+static void ahci_imx_host_stop(struct ata_host *host);
+
+static int imx_sata_enable(struct ahci_host_priv *hpriv)
{
- struct imx_ahci_priv *imxpriv = dev_get_drvdata(dev->parent);
+ struct imx_ahci_priv *imxpriv = hpriv->plat_data;
int ret;
- if (imxpriv->type == AHCI_IMX53) {
- ret = clk_prepare_enable(imxpriv->sata_gate_clk);
- if (ret < 0) {
- dev_err(dev, "prepare-enable sata_gate clock err:%d\n",
- ret);
+ if (imxpriv->no_device)
+ return 0;
+
+ if (hpriv->target_pwr) {
+ ret = regulator_enable(hpriv->target_pwr);
+ if (ret)
return ret;
- }
}
- ret = clk_prepare_enable(imxpriv->sata_ref_clk);
- if (ret < 0) {
- dev_err(dev, "prepare-enable sata_ref clock err:%d\n",
- ret);
- goto clk_err;
- }
+ ret = ahci_platform_enable_clks(hpriv);
+ if (ret < 0)
+ goto disable_regulator;
if (imxpriv->type == AHCI_IMX6Q) {
+ /*
+ * set PHY Paremeters, two steps to configure the GPR13,
+ * one write for rest of parameters, mask of first write
+ * is 0x07ffffff, and the other one write for setting
+ * the mpll_clk_en.
+ */
+ regmap_update_bits(imxpriv->gpr, IOMUXC_GPR13,
+ IMX6Q_GPR13_SATA_RX_EQ_VAL_MASK |
+ IMX6Q_GPR13_SATA_RX_LOS_LVL_MASK |
+ IMX6Q_GPR13_SATA_RX_DPLL_MODE_MASK |
+ IMX6Q_GPR13_SATA_SPD_MODE_MASK |
+ IMX6Q_GPR13_SATA_MPLL_SS_EN |
+ IMX6Q_GPR13_SATA_TX_ATTEN_MASK |
+ IMX6Q_GPR13_SATA_TX_BOOST_MASK |
+ IMX6Q_GPR13_SATA_TX_LVL_MASK |
+ IMX6Q_GPR13_SATA_MPLL_CLK_EN |
+ IMX6Q_GPR13_SATA_TX_EDGE_RATE,
+ IMX6Q_GPR13_SATA_RX_EQ_VAL_3_0_DB |
+ IMX6Q_GPR13_SATA_RX_LOS_LVL_SATA2M |
+ IMX6Q_GPR13_SATA_RX_DPLL_MODE_2P_4F |
+ IMX6Q_GPR13_SATA_SPD_MODE_3P0G |
+ IMX6Q_GPR13_SATA_MPLL_SS_EN |
+ IMX6Q_GPR13_SATA_TX_ATTEN_9_16 |
+ IMX6Q_GPR13_SATA_TX_BOOST_3_33_DB |
+ IMX6Q_GPR13_SATA_TX_LVL_1_025_V);
regmap_update_bits(imxpriv->gpr, IOMUXC_GPR13,
IMX6Q_GPR13_SATA_MPLL_CLK_EN,
IMX6Q_GPR13_SATA_MPLL_CLK_EN);
@@ -89,15 +107,19 @@ static int imx_sata_clock_enable(struct device *dev)
return 0;
-clk_err:
- if (imxpriv->type == AHCI_IMX53)
- clk_disable_unprepare(imxpriv->sata_gate_clk);
+disable_regulator:
+ if (hpriv->target_pwr)
+ regulator_disable(hpriv->target_pwr);
+
return ret;
}
-static void imx_sata_clock_disable(struct device *dev)
+static void imx_sata_disable(struct ahci_host_priv *hpriv)
{
- struct imx_ahci_priv *imxpriv = dev_get_drvdata(dev->parent);
+ struct imx_ahci_priv *imxpriv = hpriv->plat_data;
+
+ if (imxpriv->no_device)
+ return;
if (imxpriv->type == AHCI_IMX6Q) {
regmap_update_bits(imxpriv->gpr, IOMUXC_GPR13,
@@ -105,10 +127,10 @@ static void imx_sata_clock_disable(struct device *dev)
!IMX6Q_GPR13_SATA_MPLL_CLK_EN);
}
- clk_disable_unprepare(imxpriv->sata_ref_clk);
+ ahci_platform_disable_clks(hpriv);
- if (imxpriv->type == AHCI_IMX53)
- clk_disable_unprepare(imxpriv->sata_gate_clk);
+ if (hpriv->target_pwr)
+ regulator_disable(hpriv->target_pwr);
}
static void ahci_imx_error_handler(struct ata_port *ap)
@@ -118,7 +140,7 @@ static void ahci_imx_error_handler(struct ata_port *ap)
struct ata_host *host = dev_get_drvdata(ap->dev);
struct ahci_host_priv *hpriv = host->private_data;
void __iomem *mmio = hpriv->mmio;
- struct imx_ahci_priv *imxpriv = dev_get_drvdata(ap->dev->parent);
+ struct imx_ahci_priv *imxpriv = hpriv->plat_data;
ahci_error_handler(ap);
@@ -136,7 +158,7 @@ static void ahci_imx_error_handler(struct ata_port *ap)
*/
reg_val = readl(mmio + PORT_PHY_CTL);
writel(reg_val | PORT_PHY_CTL_PDDQ_LOC, mmio + PORT_PHY_CTL);
- imx_sata_clock_disable(ap->dev);
+ imx_sata_disable(hpriv);
imxpriv->no_device = true;
}
@@ -144,7 +166,9 @@ static int ahci_imx_softreset(struct ata_link *link, unsigned int *class,
unsigned long deadline)
{
struct ata_port *ap = link->ap;
- struct imx_ahci_priv *imxpriv = dev_get_drvdata(ap->dev->parent);
+ struct ata_host *host = dev_get_drvdata(ap->dev);
+ struct ahci_host_priv *hpriv = host->private_data;
+ struct imx_ahci_priv *imxpriv = hpriv->plat_data;
int ret = -EIO;
if (imxpriv->type == AHCI_IMX53)
@@ -156,7 +180,8 @@ static int ahci_imx_softreset(struct ata_link *link, unsigned int *class,
}
static struct ata_port_operations ahci_imx_ops = {
- .inherits = &ahci_platform_ops,
+ .inherits = &ahci_ops,
+ .host_stop = ahci_imx_host_stop,
.error_handler = ahci_imx_error_handler,
.softreset = ahci_imx_softreset,
};
@@ -168,79 +193,6 @@ static const struct ata_port_info ahci_imx_port_info = {
.port_ops = &ahci_imx_ops,
};
-static int imx_sata_init(struct device *dev, void __iomem *mmio)
-{
- int ret = 0;
- unsigned int reg_val;
- struct imx_ahci_priv *imxpriv = dev_get_drvdata(dev->parent);
-
- ret = imx_sata_clock_enable(dev);
- if (ret < 0)
- return ret;
-
- /*
- * Configure the HWINIT bits of the HOST_CAP and HOST_PORTS_IMPL,
- * and IP vendor specific register HOST_TIMER1MS.
- * Configure CAP_SSS (support stagered spin up).
- * Implement the port0.
- * Get the ahb clock rate, and configure the TIMER1MS register.
- */
- reg_val = readl(mmio + HOST_CAP);
- if (!(reg_val & HOST_CAP_SSS)) {
- reg_val |= HOST_CAP_SSS;
- writel(reg_val, mmio + HOST_CAP);
- }
- reg_val = readl(mmio + HOST_PORTS_IMPL);
- if (!(reg_val & 0x1)) {
- reg_val |= 0x1;
- writel(reg_val, mmio + HOST_PORTS_IMPL);
- }
-
- reg_val = clk_get_rate(imxpriv->ahb_clk) / 1000;
- writel(reg_val, mmio + HOST_TIMER1MS);
-
- return 0;
-}
-
-static void imx_sata_exit(struct device *dev)
-{
- imx_sata_clock_disable(dev);
-}
-
-static int imx_ahci_suspend(struct device *dev)
-{
- struct imx_ahci_priv *imxpriv = dev_get_drvdata(dev->parent);
-
- /*
- * If no_device is set, The CLKs had been gated off in the
- * initialization so don't do it again here.
- */
- if (!imxpriv->no_device)
- imx_sata_clock_disable(dev);
-
- return 0;
-}
-
-static int imx_ahci_resume(struct device *dev)
-{
- struct imx_ahci_priv *imxpriv = dev_get_drvdata(dev->parent);
- int ret = 0;
-
- if (!imxpriv->no_device)
- ret = imx_sata_clock_enable(dev);
-
- return ret;
-}
-
-static struct ahci_platform_data imx_sata_pdata = {
- .init = imx_sata_init,
- .exit = imx_sata_exit,
- .ata_port_info = &ahci_imx_port_info,
- .suspend = imx_ahci_suspend,
- .resume = imx_ahci_resume,
-
-};
-
static const struct of_device_id imx_ahci_of_match[] = {
{ .compatible = "fsl,imx53-ahci", .data = (void *)AHCI_IMX53 },
{ .compatible = "fsl,imx6q-ahci", .data = (void *)AHCI_IMX6Q },
@@ -251,151 +203,122 @@ MODULE_DEVICE_TABLE(of, imx_ahci_of_match);
static int imx_ahci_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
- struct resource *mem, *irq, res[2];
const struct of_device_id *of_id;
- enum ahci_imx_type type;
- const struct ahci_platform_data *pdata = NULL;
+ struct ahci_host_priv *hpriv;
struct imx_ahci_priv *imxpriv;
- struct device *ahci_dev;
- struct platform_device *ahci_pdev;
+ unsigned int reg_val;
int ret;
of_id = of_match_device(imx_ahci_of_match, dev);
if (!of_id)
return -EINVAL;
- type = (enum ahci_imx_type)of_id->data;
- pdata = &imx_sata_pdata;
-
imxpriv = devm_kzalloc(dev, sizeof(*imxpriv), GFP_KERNEL);
- if (!imxpriv) {
- dev_err(dev, "can't alloc ahci_host_priv\n");
+ if (!imxpriv)
return -ENOMEM;
- }
-
- ahci_pdev = platform_device_alloc("ahci", -1);
- if (!ahci_pdev)
- return -ENODEV;
-
- ahci_dev = &ahci_pdev->dev;
- ahci_dev->parent = dev;
imxpriv->no_device = false;
imxpriv->first_time = true;
- imxpriv->type = type;
-
+ imxpriv->type = (enum ahci_imx_type)of_id->data;
imxpriv->ahb_clk = devm_clk_get(dev, "ahb");
if (IS_ERR(imxpriv->ahb_clk)) {
dev_err(dev, "can't get ahb clock.\n");
- ret = PTR_ERR(imxpriv->ahb_clk);
- goto err_out;
+ return PTR_ERR(imxpriv->ahb_clk);
}
- if (type == AHCI_IMX53) {
- imxpriv->sata_gate_clk = devm_clk_get(dev, "sata_gate");
- if (IS_ERR(imxpriv->sata_gate_clk)) {
- dev_err(dev, "can't get sata_gate clock.\n");
- ret = PTR_ERR(imxpriv->sata_gate_clk);
- goto err_out;
+ if (imxpriv->type == AHCI_IMX6Q) {
+ imxpriv->gpr = syscon_regmap_lookup_by_compatible(
+ "fsl,imx6q-iomuxc-gpr");
+ if (IS_ERR(imxpriv->gpr)) {
+ dev_err(dev,
+ "failed to find fsl,imx6q-iomux-gpr regmap\n");
+ return PTR_ERR(imxpriv->gpr);
}
}
- imxpriv->sata_ref_clk = devm_clk_get(dev, "sata_ref");
- if (IS_ERR(imxpriv->sata_ref_clk)) {
- dev_err(dev, "can't get sata_ref clock.\n");
- ret = PTR_ERR(imxpriv->sata_ref_clk);
- goto err_out;
- }
+ hpriv = ahci_platform_get_resources(pdev);
+ if (IS_ERR(hpriv))
+ return PTR_ERR(hpriv);
+
+ hpriv->plat_data = imxpriv;
- imxpriv->ahci_pdev = ahci_pdev;
- platform_set_drvdata(pdev, imxpriv);
+ ret = imx_sata_enable(hpriv);
+ if (ret)
+ return ret;
- mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
- irq = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
- if (!mem || !irq) {
- dev_err(dev, "no mmio/irq resource\n");
- ret = -ENOMEM;
- goto err_out;
+ /*
+ * Configure the HWINIT bits of the HOST_CAP and HOST_PORTS_IMPL,
+ * and IP vendor specific register HOST_TIMER1MS.
+ * Configure CAP_SSS (support stagered spin up).
+ * Implement the port0.
+ * Get the ahb clock rate, and configure the TIMER1MS register.
+ */
+ reg_val = readl(hpriv->mmio + HOST_CAP);
+ if (!(reg_val & HOST_CAP_SSS)) {
+ reg_val |= HOST_CAP_SSS;
+ writel(reg_val, hpriv->mmio + HOST_CAP);
+ }
+ reg_val = readl(hpriv->mmio + HOST_PORTS_IMPL);
+ if (!(reg_val & 0x1)) {
+ reg_val |= 0x1;
+ writel(reg_val, hpriv->mmio + HOST_PORTS_IMPL);
}
- res[0] = *mem;
- res[1] = *irq;
+ reg_val = clk_get_rate(imxpriv->ahb_clk) / 1000;
+ writel(reg_val, hpriv->mmio + HOST_TIMER1MS);
- ahci_dev->coherent_dma_mask = DMA_BIT_MASK(32);
- ahci_dev->dma_mask = &ahci_dev->coherent_dma_mask;
- ahci_dev->of_node = dev->of_node;
+ ret = ahci_platform_init_host(pdev, hpriv, &ahci_imx_port_info, 0, 0);
+ if (ret)
+ imx_sata_disable(hpriv);
- if (type == AHCI_IMX6Q) {
- imxpriv->gpr = syscon_regmap_lookup_by_compatible(
- "fsl,imx6q-iomuxc-gpr");
- if (IS_ERR(imxpriv->gpr)) {
- dev_err(dev,
- "failed to find fsl,imx6q-iomux-gpr regmap\n");
- ret = PTR_ERR(imxpriv->gpr);
- goto err_out;
- }
+ return ret;
+}
- /*
- * Set PHY Paremeters, two steps to configure the GPR13,
- * one write for rest of parameters, mask of first write
- * is 0x07fffffe, and the other one write for setting
- * the mpll_clk_en happens in imx_sata_clock_enable().
- */
- regmap_update_bits(imxpriv->gpr, IOMUXC_GPR13,
- IMX6Q_GPR13_SATA_RX_EQ_VAL_MASK |
- IMX6Q_GPR13_SATA_RX_LOS_LVL_MASK |
- IMX6Q_GPR13_SATA_RX_DPLL_MODE_MASK |
- IMX6Q_GPR13_SATA_SPD_MODE_MASK |
- IMX6Q_GPR13_SATA_MPLL_SS_EN |
- IMX6Q_GPR13_SATA_TX_ATTEN_MASK |
- IMX6Q_GPR13_SATA_TX_BOOST_MASK |
- IMX6Q_GPR13_SATA_TX_LVL_MASK |
- IMX6Q_GPR13_SATA_MPLL_CLK_EN |
- IMX6Q_GPR13_SATA_TX_EDGE_RATE,
- IMX6Q_GPR13_SATA_RX_EQ_VAL_3_0_DB |
- IMX6Q_GPR13_SATA_RX_LOS_LVL_SATA2M |
- IMX6Q_GPR13_SATA_RX_DPLL_MODE_2P_4F |
- IMX6Q_GPR13_SATA_SPD_MODE_3P0G |
- IMX6Q_GPR13_SATA_MPLL_SS_EN |
- IMX6Q_GPR13_SATA_TX_ATTEN_9_16 |
- IMX6Q_GPR13_SATA_TX_BOOST_3_33_DB |
- IMX6Q_GPR13_SATA_TX_LVL_1_025_V);
- }
+static void ahci_imx_host_stop(struct ata_host *host)
+{
+ struct ahci_host_priv *hpriv = host->private_data;
- ret = platform_device_add_resources(ahci_pdev, res, 2);
- if (ret)
- goto err_out;
+ imx_sata_disable(hpriv);
+}
- ret = platform_device_add_data(ahci_pdev, pdata, sizeof(*pdata));
- if (ret)
- goto err_out;
+static int imx_ahci_suspend(struct device *dev)
+{
+ struct ata_host *host = dev_get_drvdata(dev);
+ struct ahci_host_priv *hpriv = host->private_data;
+ int ret;
- ret = platform_device_add(ahci_pdev);
- if (ret) {
-err_out:
- platform_device_put(ahci_pdev);
+ ret = ahci_platform_suspend_host(dev);
+ if (ret)
return ret;
- }
+
+ imx_sata_disable(hpriv);
return 0;
}
-static int imx_ahci_remove(struct platform_device *pdev)
+static int imx_ahci_resume(struct device *dev)
{
- struct imx_ahci_priv *imxpriv = platform_get_drvdata(pdev);
- struct platform_device *ahci_pdev = imxpriv->ahci_pdev;
+ struct ata_host *host = dev_get_drvdata(dev);
+ struct ahci_host_priv *hpriv = host->private_data;
+ int ret;
- platform_device_unregister(ahci_pdev);
- return 0;
+ ret = imx_sata_enable(hpriv);
+ if (ret)
+ return ret;
+
+ return ahci_platform_resume_host(dev);
}
+static SIMPLE_DEV_PM_OPS(ahci_imx_pm_ops, imx_ahci_suspend, imx_ahci_resume);
+
static struct platform_driver imx_ahci_driver = {
.probe = imx_ahci_probe,
- .remove = imx_ahci_remove,
+ .remove = ata_platform_remove_one,
.driver = {
.name = "ahci-imx",
.owner = THIS_MODULE,
.of_match_table = imx_ahci_of_match,
+ .pm = &ahci_imx_pm_ops,
},
};
module_platform_driver(imx_ahci_driver);
--
1.9.0
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