From: David Daney <david.daney@xxxxxxxxxx>
The device tree will *always* have correct ehci/ohci clock
configuration, so use it. This allows us to remove a big chunk of
platform configuration code from octeon-platform.c.
Tested-by: Alex Smith <alex.smith@xxxxxxxxxx>
Signed-off-by: David Daney <david.daney@xxxxxxxxxx>
Signed-off-by: Alex Smith <alex.smith@xxxxxxxxxx>
Cc: linux-usb@xxxxxxxxxxxxxxx
---
arch/mips/cavium-octeon/octeon-platform.c | 102 ------------------------------
drivers/usb/host/ehci-octeon.c | 17 +++--
drivers/usb/host/octeon2-common.c | 47 ++++++++++++--
drivers/usb/host/ohci-octeon.c | 17 +++--
4 files changed, 69 insertions(+), 114 deletions(-)
diff --git a/arch/mips/cavium-octeon/octeon-platform.c b/arch/mips/cavium-octeon/octeon-platform.c
index 6df0f4d..f8cced4 100644
--- a/arch/mips/cavium-octeon/octeon-platform.c
+++ b/arch/mips/cavium-octeon/octeon-platform.c
@@ -66,108 +66,6 @@ out:
}
device_initcall(octeon_rng_device_init);
-#ifdef CONFIG_USB
-
-static int __init octeon_ehci_device_init(void)
-{
- struct platform_device *pd;
- int ret = 0;
-
- struct resource usb_resources[] = {
- {
- .flags = IORESOURCE_MEM,
- }, {
- .flags = IORESOURCE_IRQ,
- }
- };
-
- /* Only Octeon2 has ehci/ohci */
- if (!OCTEON_IS_MODEL(OCTEON_CN63XX))
- return 0;
-
- if (octeon_is_simulation() || usb_disabled())
- return 0; /* No USB in the simulator. */
-
- pd = platform_device_alloc("octeon-ehci", 0);
- if (!pd) {
- ret = -ENOMEM;
- goto out;
- }
-
- usb_resources[0].start = 0x00016F0000000000ULL;
- usb_resources[0].end = usb_resources[0].start + 0x100;
-
- usb_resources[1].start = OCTEON_IRQ_USB0;
- usb_resources[1].end = OCTEON_IRQ_USB0;
-
- ret = platform_device_add_resources(pd, usb_resources,
- ARRAY_SIZE(usb_resources));
- if (ret)
- goto fail;
-
- ret = platform_device_add(pd);
- if (ret)
- goto fail;
-
- return ret;
-fail:
- platform_device_put(pd);
-out:
- return ret;
-}
-device_initcall(octeon_ehci_device_init);
-
-static int __init octeon_ohci_device_init(void)
-{
- struct platform_device *pd;
- int ret = 0;
-
- struct resource usb_resources[] = {
- {
- .flags = IORESOURCE_MEM,
- }, {
- .flags = IORESOURCE_IRQ,
- }
- };
-
- /* Only Octeon2 has ehci/ohci */
- if (!OCTEON_IS_MODEL(OCTEON_CN63XX))
- return 0;
-
- if (octeon_is_simulation() || usb_disabled())
- return 0; /* No USB in the simulator. */
-
- pd = platform_device_alloc("octeon-ohci", 0);
- if (!pd) {
- ret = -ENOMEM;
- goto out;
- }
-
- usb_resources[0].start = 0x00016F0000000400ULL;
- usb_resources[0].end = usb_resources[0].start + 0x100;
-
- usb_resources[1].start = OCTEON_IRQ_USB0;
- usb_resources[1].end = OCTEON_IRQ_USB0;
-
- ret = platform_device_add_resources(pd, usb_resources,
- ARRAY_SIZE(usb_resources));
- if (ret)
- goto fail;
-
- ret = platform_device_add(pd);
- if (ret)
- goto fail;
-
- return ret;
-fail:
- platform_device_put(pd);
-out:
- return ret;
-}
-device_initcall(octeon_ohci_device_init);
-
-#endif /* CONFIG_USB */
-
static struct of_device_id __initdata octeon_ids[] = {
{ .compatible = "simple-bus", },
{ .compatible = "cavium,octeon-6335-uctl", },
diff --git a/drivers/usb/host/ehci-octeon.c b/drivers/usb/host/ehci-octeon.c
index 9051439..e1a264f5 100644
--- a/drivers/usb/host/ehci-octeon.c
+++ b/drivers/usb/host/ehci-octeon.c
@@ -19,14 +19,14 @@
#define OCTEON_EHCI_HCD_NAME "octeon-ehci"
/* Common clock init code. */
-void octeon2_usb_clocks_start(void);
+void octeon2_usb_clocks_start(struct device *dev);
void octeon2_usb_clocks_stop(void);
-static void ehci_octeon_start(void)
+static void ehci_octeon_start(struct device *dev)
{
union cvmx_uctlx_ehci_ctl ehci_ctl;
- octeon2_usb_clocks_start();
+ octeon2_usb_clocks_start(dev);
ehci_ctl.u64 = cvmx_read_csr(CVMX_UCTLX_EHCI_CTL(0));
/* Use 64-bit addressing. */
@@ -134,7 +134,7 @@ static int ehci_octeon_drv_probe(struct platform_device *pdev)
goto err1;
}
- ehci_octeon_start();
+ ehci_octeon_start(&pdev->dev);
ehci = hcd_to_ehci(hcd);
@@ -175,6 +175,14 @@ static int ehci_octeon_drv_remove(struct platform_device *pdev)
return 0;
}
+static struct of_device_id ehci_octeon_match[] = {
+ {
+ .compatible = "cavium,octeon-6335-ehci",
+ },
+ {},
+};
+MODULE_DEVICE_TABLE(of, ehci_octeon_match);
+
static struct platform_driver ehci_octeon_driver = {
.probe = ehci_octeon_drv_probe,
.remove = ehci_octeon_drv_remove,
@@ -182,6 +190,7 @@ static struct platform_driver ehci_octeon_driver = {
.driver = {
.name = OCTEON_EHCI_HCD_NAME,
.owner = THIS_MODULE,
+ .of_match_table = ehci_octeon_match,
}
};
diff --git a/drivers/usb/host/octeon2-common.c b/drivers/usb/host/octeon2-common.c
index d9df423..3c7c13a 100644
--- a/drivers/usb/host/octeon2-common.c
+++ b/drivers/usb/host/octeon2-common.c
@@ -6,9 +6,11 @@
* Copyright (C) 2010, 2011 Cavium Networks
*/
+#include <linux/device.h>
#include <linux/module.h>
#include <linux/mutex.h>
#include <linux/delay.h>
+#include <linux/of.h>
#include <asm/octeon/octeon.h>
#include <asm/octeon/cvmx-uctlx-defs.h>
@@ -17,13 +19,15 @@ static DEFINE_MUTEX(octeon2_usb_clocks_mutex);
static int octeon2_usb_clock_start_cnt;
-void octeon2_usb_clocks_start(void)
+void octeon2_usb_clocks_start(struct device *dev)
{
u64 div;
union cvmx_uctlx_if_ena if_ena;
union cvmx_uctlx_clk_rst_ctl clk_rst_ctl;
union cvmx_uctlx_uphy_ctl_status uphy_ctl_status;
union cvmx_uctlx_uphy_portx_ctl_status port_ctl_status;
+ u32 clock_rate = 12000000;
+ bool is_crystal_clock = false;
int i;
unsigned long io_clk_64_to_ns;
@@ -36,6 +40,28 @@ void octeon2_usb_clocks_start(void)
io_clk_64_to_ns = 64000000000ull / octeon_get_io_clock_rate();
+ if (dev->of_node) {
+ struct device_node *uctl_node;
+ const char *clock_type;
+
+ uctl_node = of_get_parent(dev->of_node);
+ if (!uctl_node) {
+ dev_err(dev, "No UCTL device node\n");
+ goto exit;
+ }
+ i = of_property_read_u32(uctl_node,
+ "refclk-frequency", &clock_rate);
+ if (i) {
+ dev_err(dev, "No UCTL \"refclk-frequency\"\n");
+ goto exit;
+ }
+ i = of_property_read_string(uctl_node,
+ "refclk-type", &clock_type);
+
+ if (!i && strcmp("crystal", clock_type) == 0)
+ is_crystal_clock = true;
+ }
+
/*
* Step 1: Wait for voltages stable. That surely happened
* before starting the kernel.
@@ -66,9 +92,22 @@ void octeon2_usb_clocks_start(void)
cvmx_write_csr(CVMX_UCTLX_CLK_RST_CTL(0), clk_rst_ctl.u64);
/* 3b */
- /* 12MHz crystal. */
- clk_rst_ctl.s.p_refclk_sel = 0;
- clk_rst_ctl.s.p_refclk_div = 0;
+ clk_rst_ctl.s.p_refclk_sel = is_crystal_clock ? 0 : 1;
+ switch (clock_rate) {
+ default:
+ pr_err("Invalid UCTL clock rate of %u, using 12000000 instead\n",
+ clock_rate);
+ /* Fall through */
+ case 12000000:
+ clk_rst_ctl.s.p_refclk_div = 0;
+ break;
+ case 24000000:
+ clk_rst_ctl.s.p_refclk_div = 1;
+ break;
+ case 48000000:
+ clk_rst_ctl.s.p_refclk_div = 2;
+ break;
+ }
cvmx_write_csr(CVMX_UCTLX_CLK_RST_CTL(0), clk_rst_ctl.u64);
/* 3c */
diff --git a/drivers/usb/host/ohci-octeon.c b/drivers/usb/host/ohci-octeon.c
index 15af895..2127290 100644
--- a/drivers/usb/host/ohci-octeon.c
+++ b/drivers/usb/host/ohci-octeon.c
@@ -19,14 +19,14 @@
#define OCTEON_OHCI_HCD_NAME "octeon-ohci"
/* Common clock init code. */
-void octeon2_usb_clocks_start(void);
+void octeon2_usb_clocks_start(struct device *dev);
void octeon2_usb_clocks_stop(void);
-static void ohci_octeon_hw_start(void)
+static void ohci_octeon_hw_start(struct device *dev)
{
union cvmx_uctlx_ohci_ctl ohci_ctl;
- octeon2_usb_clocks_start();
+ octeon2_usb_clocks_start(dev);
ohci_ctl.u64 = cvmx_read_csr(CVMX_UCTLX_OHCI_CTL(0));
ohci_ctl.s.l2c_addr_msb = 0;
@@ -144,7 +144,7 @@ static int ohci_octeon_drv_probe(struct platform_device *pdev)
goto err1;
}
- ohci_octeon_hw_start();
+ ohci_octeon_hw_start(&pdev->dev);
hcd->regs = reg_base;
@@ -189,6 +189,14 @@ static int ohci_octeon_drv_remove(struct platform_device *pdev)
return 0;
}
+static struct of_device_id ohci_octeon_match[] = {
+ {
+ .compatible = "cavium,octeon-6335-ohci",
+ },
+ {},
+};
+MODULE_DEVICE_TABLE(of, ohci_octeon_match);
+
static struct platform_driver ohci_octeon_driver = {
.probe = ohci_octeon_drv_probe,
.remove = ohci_octeon_drv_remove,
@@ -196,6 +204,7 @@ static struct platform_driver ohci_octeon_driver = {
.driver = {
.name = OCTEON_OHCI_HCD_NAME,
.owner = THIS_MODULE,
+ .of_match_table = ohci_octeon_match,
}
};
--
1.9.3
--
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