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Message-ID: <c6a012350a47f09679e2a43a182569e9e7c3b008.1391871170.git.pratyush.anand@st.com>
Date: Mon, 10 Feb 2014 14:21:56 +0530
From: Mohit Kumar <mohit.kumar@...com>
To: <arnd@...db.de>
Cc: Pratyush Anand <pratyush.anand@...com>,
Viresh Kumar <viresh.linux@...il.com>,
Tejun Heo <tj@...nel.org>,
Kishon Vijay Abraham I <kishon@...com>,
<spear-devel@...t.st.com>, <linux-arm-kernel@...ts.infradead.org>,
<devicetree@...r.kernel.org>, <linux-ide@...r.kernel.org>,
<linux-kernel@...r.kernel.org>, <linux-pm@...r.kernel.org>
Subject: [PATCH V5 5/8] SPEAr13xx: Fixup: Move SPEAr1340 SATA platform code to phy driver
From: Pratyush Anand <pratyush.anand@...com>
ahci driver needs some platform specific functions which are called at
init, exit, suspend and resume conditions. Till now these functions were
present in a platform driver with a fixme notes.
Similar functions modifying same set of registers will also be needed in
case of PCIe phy init/exit.
So move all these SATA platform code to phy-miphy40lp driver.
Signed-off-by: Pratyush Anand <pratyush.anand@...com>
Tested-by: Mohit Kumar <mohit.kumar@...com>
Cc: Viresh Kumar <viresh.linux@...il.com>
Cc: Tejun Heo <tj@...nel.org>
Cc: Arnd Bergmann <arnd@...db.de>
Cc: Kishon Vijay Abraham I <kishon@...com>
Cc: spear-devel@...t.st.com
Cc: linux-arm-kernel@...ts.infradead.org
Cc: devicetree@...r.kernel.org
Cc: linux-ide@...r.kernel.org
Cc: linux-kernel@...r.kernel.org
Cc: linux-pm@...r.kernel.org
---
.../devicetree/bindings/arm/spear-misc.txt | 4 +
arch/arm/boot/dts/spear1310-evb.dts | 4 +
arch/arm/boot/dts/spear1310.dtsi | 39 +++++-
arch/arm/boot/dts/spear1340-evb.dts | 4 +
arch/arm/boot/dts/spear1340.dtsi | 13 +-
arch/arm/boot/dts/spear13xx.dtsi | 5 +
arch/arm/mach-spear/Kconfig | 2 +
arch/arm/mach-spear/spear1340.c | 127 +-----------------
drivers/phy/phy-miphy40lp.c | 144 +++++++++++++++++++++
9 files changed, 212 insertions(+), 130 deletions(-)
create mode 100644 Documentation/devicetree/bindings/arm/spear-misc.txt
diff --git a/Documentation/devicetree/bindings/arm/spear-misc.txt b/Documentation/devicetree/bindings/arm/spear-misc.txt
new file mode 100644
index 0000000..aacd36a
--- /dev/null
+++ b/Documentation/devicetree/bindings/arm/spear-misc.txt
@@ -0,0 +1,4 @@
+* SPEAr Misc configuration
+** misc node required properties:
+- compatible Should be "st,spear1340-misc", "syscon".
+- reg: Address range of misc space
diff --git a/arch/arm/boot/dts/spear1310-evb.dts b/arch/arm/boot/dts/spear1310-evb.dts
index b56a801..d42c84b 100644
--- a/arch/arm/boot/dts/spear1310-evb.dts
+++ b/arch/arm/boot/dts/spear1310-evb.dts
@@ -106,6 +106,10 @@
status = "okay";
};
+ miphy@...00000 {
+ status = "okay";
+ };
+
cf@...00000 {
status = "okay";
};
diff --git a/arch/arm/boot/dts/spear1310.dtsi b/arch/arm/boot/dts/spear1310.dtsi
index 122ae94..64e7dd5 100644
--- a/arch/arm/boot/dts/spear1310.dtsi
+++ b/arch/arm/boot/dts/spear1310.dtsi
@@ -29,24 +29,57 @@
#gpio-cells = <2>;
};
- ahci@...00000 {
+ miphy0: miphy@...00000 {
+ compatible = "st,miphy", "st,spear1310-miphy";
+ reg = <0xeb800000 0x4000>;
+ misc = <&misc>;
+ phy-id = <0>;
+ #phy-cells = <1>;
+ status = "disabled";
+ };
+
+ miphy1: miphy@...04000 {
+ compatible = "st,miphy", "st,spear1310-miphy";
+ reg = <0xeb804000 0x4000>;
+ misc = <&misc>;
+ phy-id = <1>;
+ #phy-cells = <1>;
+ status = "disabled";
+ };
+
+ miphy2: miphy@...08000 {
+ compatible = "st,miphy", "st,spear1310-miphy";
+ reg = <0xeb808000 0x4000>;
+ misc = <&misc>;
+ phy-id = <2>;
+ #phy-cells = <1>;
+ status = "disabled";
+ };
+
+ ahci0: ahci@...00000 {
compatible = "snps,spear-ahci";
reg = <0xb1000000 0x10000>;
interrupts = <0 68 0x4>;
+ phys = <&miphy0 0>;
+ phy-names = "sata-phy";
status = "disabled";
};
- ahci@...00000 {
+ ahci1: ahci@...00000 {
compatible = "snps,spear-ahci";
reg = <0xb1800000 0x10000>;
interrupts = <0 69 0x4>;
+ phys = <&miphy1 0>;
+ phy-names = "sata-phy";
status = "disabled";
};
- ahci@...00000 {
+ ahci2: ahci@...00000 {
compatible = "snps,spear-ahci";
reg = <0xb4000000 0x10000>;
interrupts = <0 70 0x4>;
+ phys = <&miphy2 0>;
+ phy-names = "sata-phy";
status = "disabled";
};
diff --git a/arch/arm/boot/dts/spear1340-evb.dts b/arch/arm/boot/dts/spear1340-evb.dts
index d6c30ae..b23e05e 100644
--- a/arch/arm/boot/dts/spear1340-evb.dts
+++ b/arch/arm/boot/dts/spear1340-evb.dts
@@ -122,6 +122,10 @@
status = "okay";
};
+ miphy@...00000 {
+ status = "okay";
+ };
+
dma@...00000 {
status = "okay";
};
diff --git a/arch/arm/boot/dts/spear1340.dtsi b/arch/arm/boot/dts/spear1340.dtsi
index 54d128d..7e3a04b 100644
--- a/arch/arm/boot/dts/spear1340.dtsi
+++ b/arch/arm/boot/dts/spear1340.dtsi
@@ -31,10 +31,21 @@
status = "disabled";
};
- ahci@...00000 {
+ miphy0: miphy@...00000 {
+ compatible = "st,miphy", "st,spear1340-miphy";
+ reg = <0xeb800000 0x4000>;
+ misc = <&misc>;
+ phy-id = <0>;
+ #phy-cells = <1>;
+ status = "disabled";
+ };
+
+ ahci0: ahci@...00000 {
compatible = "snps,spear-ahci";
reg = <0xb1000000 0x10000>;
interrupts = <0 72 0x4>;
+ phys = <&miphy0 0>;
+ phy-names = "sata-phy";
status = "disabled";
};
diff --git a/arch/arm/boot/dts/spear13xx.dtsi b/arch/arm/boot/dts/spear13xx.dtsi
index 4382547..3a72508 100644
--- a/arch/arm/boot/dts/spear13xx.dtsi
+++ b/arch/arm/boot/dts/spear13xx.dtsi
@@ -220,6 +220,11 @@
0xd8000000 0xd8000000 0x01000000
0xe0000000 0xe0000000 0x10000000>;
+ misc: syscon@...00000 {
+ compatible = "st,spear1340-misc", "syscon";
+ reg = <0xe0700000 0x1000>;
+ };
+
gpio0: gpio@...00000 {
compatible = "arm,pl061", "arm,primecell";
reg = <0xe0600000 0x1000>;
diff --git a/arch/arm/mach-spear/Kconfig b/arch/arm/mach-spear/Kconfig
index ac1710e6..7e7f1b0 100644
--- a/arch/arm/mach-spear/Kconfig
+++ b/arch/arm/mach-spear/Kconfig
@@ -26,6 +26,8 @@ config ARCH_SPEAR13XX
select MIGHT_HAVE_CACHE_L2X0
select PINCTRL
select USE_OF
+ select MFD_SYSCON
+ select PHY_ST_MIPHY40LP
help
Supports for ARM's SPEAR13XX family
diff --git a/arch/arm/mach-spear/spear1340.c b/arch/arm/mach-spear/spear1340.c
index 3fb6834..8e27093 100644
--- a/arch/arm/mach-spear/spear1340.c
+++ b/arch/arm/mach-spear/spear1340.c
@@ -11,138 +11,13 @@
* warranty of any kind, whether express or implied.
*/
-#define pr_fmt(fmt) "SPEAr1340: " fmt
-
-#include <linux/ahci_platform.h>
-#include <linux/amba/serial.h>
-#include <linux/delay.h>
#include <linux/of_platform.h>
#include <asm/mach/arch.h>
#include "generic.h"
-#include <mach/spear.h>
-
-/* FIXME: Move SATA PHY code into a standalone driver */
-
-/* Base addresses */
-#define SPEAR1340_SATA_BASE UL(0xB1000000)
-
-/* Power Management Registers */
-#define SPEAR1340_PCM_CFG (VA_MISC_BASE + 0x100)
-#define SPEAR1340_PCM_WKUP_CFG (VA_MISC_BASE + 0x104)
-#define SPEAR1340_SWITCH_CTR (VA_MISC_BASE + 0x108)
-
-#define SPEAR1340_PERIP1_SW_RST (VA_MISC_BASE + 0x318)
-#define SPEAR1340_PERIP2_SW_RST (VA_MISC_BASE + 0x31C)
-#define SPEAR1340_PERIP3_SW_RST (VA_MISC_BASE + 0x320)
-
-/* PCIE - SATA configuration registers */
-#define SPEAR1340_PCIE_SATA_CFG (VA_MISC_BASE + 0x424)
- /* PCIE CFG MASks */
- #define SPEAR1340_PCIE_CFG_DEVICE_PRESENT (1 << 11)
- #define SPEAR1340_PCIE_CFG_POWERUP_RESET (1 << 10)
- #define SPEAR1340_PCIE_CFG_CORE_CLK_EN (1 << 9)
- #define SPEAR1340_PCIE_CFG_AUX_CLK_EN (1 << 8)
- #define SPEAR1340_SATA_CFG_TX_CLK_EN (1 << 4)
- #define SPEAR1340_SATA_CFG_RX_CLK_EN (1 << 3)
- #define SPEAR1340_SATA_CFG_POWERUP_RESET (1 << 2)
- #define SPEAR1340_SATA_CFG_PM_CLK_EN (1 << 1)
- #define SPEAR1340_PCIE_SATA_SEL_PCIE (0)
- #define SPEAR1340_PCIE_SATA_SEL_SATA (1)
- #define SPEAR1340_SATA_PCIE_CFG_MASK 0xF1F
- #define SPEAR1340_PCIE_CFG_VAL (SPEAR1340_PCIE_SATA_SEL_PCIE | \
- SPEAR1340_PCIE_CFG_AUX_CLK_EN | \
- SPEAR1340_PCIE_CFG_CORE_CLK_EN | \
- SPEAR1340_PCIE_CFG_POWERUP_RESET | \
- SPEAR1340_PCIE_CFG_DEVICE_PRESENT)
- #define SPEAR1340_SATA_CFG_VAL (SPEAR1340_PCIE_SATA_SEL_SATA | \
- SPEAR1340_SATA_CFG_PM_CLK_EN | \
- SPEAR1340_SATA_CFG_POWERUP_RESET | \
- SPEAR1340_SATA_CFG_RX_CLK_EN | \
- SPEAR1340_SATA_CFG_TX_CLK_EN)
-
-#define SPEAR1340_PCIE_MIPHY_CFG (VA_MISC_BASE + 0x428)
- #define SPEAR1340_MIPHY_OSC_BYPASS_EXT (1 << 31)
- #define SPEAR1340_MIPHY_CLK_REF_DIV2 (1 << 27)
- #define SPEAR1340_MIPHY_CLK_REF_DIV4 (2 << 27)
- #define SPEAR1340_MIPHY_CLK_REF_DIV8 (3 << 27)
- #define SPEAR1340_MIPHY_PLL_RATIO_TOP(x) (x << 0)
- #define SPEAR1340_PCIE_SATA_MIPHY_CFG_SATA \
- (SPEAR1340_MIPHY_OSC_BYPASS_EXT | \
- SPEAR1340_MIPHY_CLK_REF_DIV2 | \
- SPEAR1340_MIPHY_PLL_RATIO_TOP(60))
- #define SPEAR1340_PCIE_SATA_MIPHY_CFG_SATA_25M_CRYSTAL_CLK \
- (SPEAR1340_MIPHY_PLL_RATIO_TOP(120))
- #define SPEAR1340_PCIE_SATA_MIPHY_CFG_PCIE \
- (SPEAR1340_MIPHY_OSC_BYPASS_EXT | \
- SPEAR1340_MIPHY_PLL_RATIO_TOP(25))
-
-/* SATA device registration */
-static int sata_miphy_init(struct device *dev, void __iomem *addr)
-{
- writel(SPEAR1340_SATA_CFG_VAL, SPEAR1340_PCIE_SATA_CFG);
- writel(SPEAR1340_PCIE_SATA_MIPHY_CFG_SATA_25M_CRYSTAL_CLK,
- SPEAR1340_PCIE_MIPHY_CFG);
- /* Switch on sata power domain */
- writel((readl(SPEAR1340_PCM_CFG) | (0x800)), SPEAR1340_PCM_CFG);
- msleep(20);
- /* Disable PCIE SATA Controller reset */
- writel((readl(SPEAR1340_PERIP1_SW_RST) & (~0x1000)),
- SPEAR1340_PERIP1_SW_RST);
- msleep(20);
-
- return 0;
-}
-
-void sata_miphy_exit(struct device *dev)
-{
- writel(0, SPEAR1340_PCIE_SATA_CFG);
- writel(0, SPEAR1340_PCIE_MIPHY_CFG);
-
- /* Enable PCIE SATA Controller reset */
- writel((readl(SPEAR1340_PERIP1_SW_RST) | (0x1000)),
- SPEAR1340_PERIP1_SW_RST);
- msleep(20);
- /* Switch off sata power domain */
- writel((readl(SPEAR1340_PCM_CFG) & (~0x800)), SPEAR1340_PCM_CFG);
- msleep(20);
-}
-
-int sata_suspend(struct device *dev)
-{
- if (dev->power.power_state.event == PM_EVENT_FREEZE)
- return 0;
-
- sata_miphy_exit(dev);
-
- return 0;
-}
-
-int sata_resume(struct device *dev)
-{
- if (dev->power.power_state.event == PM_EVENT_THAW)
- return 0;
-
- return sata_miphy_init(dev, NULL);
-}
-
-static struct ahci_platform_data sata_pdata = {
- .init = sata_miphy_init,
- .exit = sata_miphy_exit,
- .suspend = sata_suspend,
- .resume = sata_resume,
-};
-
-/* Add SPEAr1340 auxdata to pass platform data */
-static struct of_dev_auxdata spear1340_auxdata_lookup[] __initdata = {
- OF_DEV_AUXDATA("snps,spear-ahci", SPEAR1340_SATA_BASE, NULL,
- &sata_pdata),
- {}
-};
static void __init spear1340_dt_init(void)
{
- of_platform_populate(NULL, of_default_bus_match_table,
- spear1340_auxdata_lookup, NULL);
+ of_platform_populate(NULL, of_default_bus_match_table, NULL, NULL);
}
static const char * const spear1340_dt_board_compat[] = {
diff --git a/drivers/phy/phy-miphy40lp.c b/drivers/phy/phy-miphy40lp.c
index 3a9ada1..0ee1972 100644
--- a/drivers/phy/phy-miphy40lp.c
+++ b/drivers/phy/phy-miphy40lp.c
@@ -8,8 +8,10 @@
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
+ * 04/02/2014: Adding support of SATA mode for SPEAr1340.
*/
+#include <linux/bitops.h>
#include <linux/delay.h>
#include <linux/dma-mapping.h>
#include <linux/kernel.h>
@@ -19,6 +21,60 @@
#include <linux/phy/phy.h>
#include <linux/regmap.h>
+/* SPEAr1340 Registers */
+/* Power Management Registers */
+#define SPEAR1340_PCM_CFG 0x100
+ #define SPEAR1340_PCM_CFG_SATA_POWER_EN BIT(11)
+#define SPEAR1340_PCM_WKUP_CFG 0x104
+#define SPEAR1340_SWITCH_CTR 0x108
+
+#define SPEAR1340_PERIP1_SW_RST 0x318
+ #define SPEAR1340_PERIP1_SW_RSATA BIT(12)
+#define SPEAR1340_PERIP2_SW_RST 0x31C
+#define SPEAR1340_PERIP3_SW_RST 0x320
+
+/* PCIE - SATA configuration registers */
+#define SPEAR1340_PCIE_SATA_CFG 0x424
+ /* PCIE CFG MASks */
+ #define SPEAR1340_PCIE_CFG_DEVICE_PRESENT BIT(11)
+ #define SPEAR1340_PCIE_CFG_POWERUP_RESET BIT(10)
+ #define SPEAR1340_PCIE_CFG_CORE_CLK_EN BIT(9)
+ #define SPEAR1340_PCIE_CFG_AUX_CLK_EN BIT(8)
+ #define SPEAR1340_SATA_CFG_TX_CLK_EN BIT(4)
+ #define SPEAR1340_SATA_CFG_RX_CLK_EN BIT(3)
+ #define SPEAR1340_SATA_CFG_POWERUP_RESET BIT(2)
+ #define SPEAR1340_SATA_CFG_PM_CLK_EN BIT(1)
+ #define SPEAR1340_PCIE_SATA_SEL_PCIE (0)
+ #define SPEAR1340_PCIE_SATA_SEL_SATA (1)
+ #define SPEAR1340_PCIE_SATA_CFG_MASK 0xF1F
+ #define SPEAR1340_PCIE_CFG_VAL (SPEAR1340_PCIE_SATA_SEL_PCIE | \
+ SPEAR1340_PCIE_CFG_AUX_CLK_EN | \
+ SPEAR1340_PCIE_CFG_CORE_CLK_EN | \
+ SPEAR1340_PCIE_CFG_POWERUP_RESET | \
+ SPEAR1340_PCIE_CFG_DEVICE_PRESENT)
+ #define SPEAR1340_SATA_CFG_VAL (SPEAR1340_PCIE_SATA_SEL_SATA | \
+ SPEAR1340_SATA_CFG_PM_CLK_EN | \
+ SPEAR1340_SATA_CFG_POWERUP_RESET | \
+ SPEAR1340_SATA_CFG_RX_CLK_EN | \
+ SPEAR1340_SATA_CFG_TX_CLK_EN)
+
+#define SPEAR1340_PCIE_MIPHY_CFG 0x428
+ #define SPEAR1340_MIPHY_OSC_BYPASS_EXT BIT(31)
+ #define SPEAR1340_MIPHY_CLK_REF_DIV2 BIT(27)
+ #define SPEAR1340_MIPHY_CLK_REF_DIV4 (2 << 27)
+ #define SPEAR1340_MIPHY_CLK_REF_DIV8 (3 << 27)
+ #define SPEAR1340_MIPHY_PLL_RATIO_TOP(x) (x << 0)
+ #define SPEAR1340_PCIE_MIPHY_CFG_MASK 0xF80000FF
+ #define SPEAR1340_PCIE_SATA_MIPHY_CFG_SATA \
+ (SPEAR1340_MIPHY_OSC_BYPASS_EXT | \
+ SPEAR1340_MIPHY_CLK_REF_DIV2 | \
+ SPEAR1340_MIPHY_PLL_RATIO_TOP(60))
+ #define SPEAR1340_PCIE_SATA_MIPHY_CFG_SATA_25M_CRYSTAL_CLK \
+ (SPEAR1340_MIPHY_PLL_RATIO_TOP(120))
+ #define SPEAR1340_PCIE_SATA_MIPHY_CFG_PCIE \
+ (SPEAR1340_MIPHY_OSC_BYPASS_EXT | \
+ SPEAR1340_MIPHY_PLL_RATIO_TOP(25))
+
enum phy_mode {
SATA,
PCIE,
@@ -50,6 +106,93 @@ struct miphy40lp_priv {
struct miphy40lp_plat_ops *plat_ops;
};
+static int miphy40lp_spear1340_sata_init(struct miphy40lp_priv *priv)
+{
+ regmap_update_bits(priv->misc, SPEAR1340_PCIE_SATA_CFG,
+ SPEAR1340_PCIE_SATA_CFG_MASK, SPEAR1340_SATA_CFG_VAL);
+ regmap_update_bits(priv->misc, SPEAR1340_PCIE_MIPHY_CFG,
+ SPEAR1340_PCIE_MIPHY_CFG_MASK,
+ SPEAR1340_PCIE_SATA_MIPHY_CFG_SATA_25M_CRYSTAL_CLK);
+ /* Switch on sata power domain */
+ regmap_update_bits(priv->misc, SPEAR1340_PCM_CFG,
+ SPEAR1340_PCM_CFG_SATA_POWER_EN,
+ SPEAR1340_PCM_CFG_SATA_POWER_EN);
+ msleep(20);
+ /* Disable PCIE SATA Controller reset */
+ regmap_update_bits(priv->misc, SPEAR1340_PERIP1_SW_RST,
+ SPEAR1340_PERIP1_SW_RSATA, 0);
+ msleep(20);
+
+ return 0;
+}
+
+static int miphy40lp_spear1340_sata_exit(struct miphy40lp_priv *priv)
+{
+ regmap_update_bits(priv->misc, SPEAR1340_PCIE_SATA_CFG,
+ SPEAR1340_PCIE_SATA_CFG_MASK, 0);
+ regmap_update_bits(priv->misc, SPEAR1340_PCIE_MIPHY_CFG,
+ SPEAR1340_PCIE_MIPHY_CFG_MASK, 0);
+
+ /* Enable PCIE SATA Controller reset */
+ regmap_update_bits(priv->misc, SPEAR1340_PERIP1_SW_RST,
+ SPEAR1340_PERIP1_SW_RSATA,
+ SPEAR1340_PERIP1_SW_RSATA);
+ msleep(20);
+ /* Switch off sata power domain */
+ regmap_update_bits(priv->misc, SPEAR1340_PCM_CFG,
+ SPEAR1340_PCM_CFG_SATA_POWER_EN, 0);
+ msleep(20);
+
+ return 0;
+}
+
+static int miphy40lp_spear1340_init(struct miphy40lp_priv *priv)
+{
+ int ret = 0;
+
+ if (priv->mode == SATA)
+ ret = miphy40lp_spear1340_sata_init(priv);
+
+ return ret;
+}
+
+static int miphy40lp_spear1340_exit(struct miphy40lp_priv *priv)
+{
+ int ret = 0;
+
+ if (priv->mode == SATA)
+ ret = miphy40lp_spear1340_sata_exit(priv);
+
+ return ret;
+}
+
+static int miphy40lp_spear1340_suspend(struct miphy40lp_priv *priv)
+{
+ int ret = 0;
+
+ if (priv->mode == SATA)
+ ret = miphy40lp_spear1340_sata_exit(priv);
+
+ return ret;
+}
+
+static int miphy40lp_spear1340_resume(struct miphy40lp_priv *priv)
+{
+ int ret = 0;
+
+ if (priv->mode == SATA)
+ ret = miphy40lp_spear1340_sata_init(priv);
+
+ return ret;
+}
+
+static struct miphy40lp_plat_ops spear1340_phy_ops = {
+ .plat_init = miphy40lp_spear1340_init,
+ .plat_exit = miphy40lp_spear1340_exit,
+ .plat_suspend = miphy40lp_spear1340_suspend,
+ .plat_resume = miphy40lp_spear1340_resume,
+};
+
static int miphy40lp_init(struct phy *phy)
{
struct miphy40lp_priv *priv = phy_get_drvdata(phy);
@@ -100,6 +243,7 @@ static int miphy40lp_power_on(struct phy *phy)
static const struct of_device_id miphy40lp_of_match[] = {
{ .compatible = "st,miphy40lp-phy", .data = NULL },
+ { .compatible = "st,spear1340-miphy", .data = &spear1340_phy_ops },
{ },
};
MODULE_DEVICE_TABLE(of, miphy40lp_of_match);
--
1.8.1.2
--
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