[PATCH v7 3/3] USB: ohci-nxp: Use isp1301 driver

From: Roland Stigge
Date: Thu Apr 26 2012 - 04:28:24 EST

ohci-nxp duplicates the isp1301 driver. This patch removes this code and makes
ohci-nxp use the new separate isp1301 driver instead.

Signed-off-by: Roland Stigge <stigge@xxxxxxxxx>
Acked-by: Arnd Bergmann <arnd@xxxxxxxx>

---

Applies to v3.4-rc4 + LPC32xx OHCI DT patches (i.e. the first two patches of
the "second patch set for LPC32xx DT conversion" series)

Depends on the isp1301 driver, see PATCH 1/3

Changes since v6:
* None

Documentation/devicetree/bindings/usb/ohci-nxp.txt | 8 +
drivers/usb/host/Kconfig | 1
drivers/usb/host/ohci-nxp.c | 121 ++-------------------
3 files changed, 24 insertions(+), 106 deletions(-)

--- linux-2.6.orig/Documentation/devicetree/bindings/usb/ohci-nxp.txt
+++ linux-2.6/Documentation/devicetree/bindings/usb/ohci-nxp.txt
@@ -5,12 +5,20 @@ Required properties:
- reg: physical base address of the controller and length of memory mapped
region.
- interrupts: The OHCI interrupt
+- transceiver: phandle of the associated ISP1301 device - this is necessary for
+ the UDC controller for connecting to the USB physical layer

Example (LPC32xx):

+ isp1301: usb-transceiver@2c {
+ compatible = "nxp,isp1301";
+ reg = <0x2c>;
+ };
+
ohci@31020000 {
compatible = "nxp,ohci-nxp";
reg = <0x31020000 0x300>;
interrupt-parent = <&mic>;
interrupts = <0x3b 0>;
+ transceiver = <&isp1301>;
};
--- linux-2.6.orig/drivers/usb/host/Kconfig
+++ linux-2.6/drivers/usb/host/Kconfig
@@ -291,6 +291,7 @@ config USB_OHCI_HCD
depends on USB && USB_ARCH_HAS_OHCI
select ISP1301_OMAP if MACH_OMAP_H2 || MACH_OMAP_H3
select USB_OTG_UTILS if ARCH_OMAP
+ select USB_ISP1301 if ARCH_LPC32XX || ARCH_PNX4008
---help---
The Open Host Controller Interface (OHCI) is a standard for accessing
USB 1.1 host controller hardware. It does more in hardware than Intel's
--- linux-2.6.orig/drivers/usb/host/ohci-nxp.c
+++ linux-2.6/drivers/usb/host/ohci-nxp.c
@@ -23,6 +23,7 @@
#include <linux/platform_device.h>
#include <linux/i2c.h>
#include <linux/of.h>
+#include <linux/usb/isp1301.h>

#include <mach/hardware.h>
#include <asm/mach-types.h>
@@ -58,54 +59,6 @@
#define TRANSPARENT_I2C_EN (1 << 7)
#define HOST_EN (1 << 0)

-/* ISP1301 USB transceiver I2C registers */
-#define ISP1301_MODE_CONTROL_1 0x04 /* u8 read, set, +1 clear */
-
-#define MC1_SPEED_REG (1 << 0)
-#define MC1_SUSPEND_REG (1 << 1)
-#define MC1_DAT_SE0 (1 << 2)
-#define MC1_TRANSPARENT (1 << 3)
-#define MC1_BDIS_ACON_EN (1 << 4)
-#define MC1_OE_INT_EN (1 << 5)
-#define MC1_UART_EN (1 << 6)
-#define MC1_MASK 0x7f
-
-#define ISP1301_MODE_CONTROL_2 0x12 /* u8 read, set, +1 clear */
-
-#define MC2_GLOBAL_PWR_DN (1 << 0)
-#define MC2_SPD_SUSP_CTRL (1 << 1)
-#define MC2_BI_DI (1 << 2)
-#define MC2_TRANSP_BDIR0 (1 << 3)
-#define MC2_TRANSP_BDIR1 (1 << 4)
-#define MC2_AUDIO_EN (1 << 5)
-#define MC2_PSW_EN (1 << 6)
-#define MC2_EN2V7 (1 << 7)
-
-#define ISP1301_OTG_CONTROL_1 0x06 /* u8 read, set, +1 clear */
-# define OTG1_DP_PULLUP (1 << 0)
-# define OTG1_DM_PULLUP (1 << 1)
-# define OTG1_DP_PULLDOWN (1 << 2)
-# define OTG1_DM_PULLDOWN (1 << 3)
-# define OTG1_ID_PULLDOWN (1 << 4)
-# define OTG1_VBUS_DRV (1 << 5)
-# define OTG1_VBUS_DISCHRG (1 << 6)
-# define OTG1_VBUS_CHRG (1 << 7)
-#define ISP1301_OTG_STATUS 0x10 /* u8 readonly */
-# define OTG_B_SESS_END (1 << 6)
-# define OTG_B_SESS_VLD (1 << 7)
-
-#define ISP1301_I2C_ADDR 0x2C
-
-#define ISP1301_I2C_MODE_CONTROL_1 0x4
-#define ISP1301_I2C_MODE_CONTROL_2 0x12
-#define ISP1301_I2C_OTG_CONTROL_1 0x6
-#define ISP1301_I2C_OTG_CONTROL_2 0x10
-#define ISP1301_I2C_INTERRUPT_SOURCE 0x8
-#define ISP1301_I2C_INTERRUPT_LATCH 0xA
-#define ISP1301_I2C_INTERRUPT_FALLING 0xC
-#define ISP1301_I2C_INTERRUPT_RISING 0xE
-#define ISP1301_I2C_REG_CLEAR_ADDR 1
-
/* On LPC32xx, those are undefined */
#ifndef start_int_set_falling_edge
#define start_int_set_falling_edge(irq)
@@ -115,41 +68,12 @@
#define start_int_umask(irq)
#endif

-static struct i2c_driver isp1301_driver;
static struct i2c_client *isp1301_i2c_client;

extern int usb_disabled(void);

static struct clk *usb_clk;

-static const unsigned short normal_i2c[] =
- { ISP1301_I2C_ADDR, ISP1301_I2C_ADDR + 1, I2C_CLIENT_END };
-
-static int isp1301_probe(struct i2c_client *client,
- const struct i2c_device_id *id)
-{
- return 0;
-}
-
-static int isp1301_remove(struct i2c_client *client)
-{
- return 0;
-}
-
-static const struct i2c_device_id isp1301_id[] = {
- { "isp1301_nxp", 0 },
- { }
-};
-
-static struct i2c_driver isp1301_driver = {
- .driver = {
- .name = "isp1301_nxp",
- },
- .probe = isp1301_probe,
- .remove = isp1301_remove,
- .id_table = isp1301_id,
-};
-
static void isp1301_configure_pnx4008(void)
{
/* PNX4008 only supports DAT_SE0 USB mode */
@@ -373,11 +297,22 @@ static int __devinit usb_hcd_nxp_probe(s
struct usb_hcd *hcd = 0;
struct ohci_hcd *ohci;
const struct hc_driver *driver = &ohci_nxp_hc_driver;
- struct i2c_adapter *i2c_adap;
- struct i2c_board_info i2c_info;
struct resource *res;
-
int ret = 0, irq;
+ struct device_node *isp1301_node;
+
+ if (pdev->dev.of_node) {
+ isp1301_node = of_parse_phandle(pdev->dev.of_node,
+ "transceiver", 0);
+ } else {
+ isp1301_node = NULL;
+ }
+
+ isp1301_i2c_client = isp1301_get_client(isp1301_node);
+ if (!isp1301_i2c_client) {
+ ret = -EPROBE_DEFER;
+ goto out;
+ }

pdev->dev.coherent_dma_mask = DMA_BIT_MASK(32);
pdev->dev.dma_mask = &pdev->dev.coherent_dma_mask;
@@ -392,28 +327,6 @@ static int __devinit usb_hcd_nxp_probe(s
/* Enable AHB slave USB clock, needed for further USB clock control */
__raw_writel(USB_SLAVE_HCLK_EN | PAD_CONTROL_LAST_DRIVEN, USB_CTRL);

- ret = i2c_add_driver(&isp1301_driver);
- if (ret < 0) {
- err("failed to add ISP1301 driver");
- goto out;
- }
- i2c_adap = i2c_get_adapter(2);
- if (!i2c_adap) {
- err("failed on i2c_get_adapter");
- goto out_i2c_driver;
- }
-
- memset(&i2c_info, 0, sizeof(struct i2c_board_info));
- strlcpy(i2c_info.type, "isp1301_nxp", I2C_NAME_SIZE);
- isp1301_i2c_client = i2c_new_probed_device(i2c_adap, &i2c_info,
- normal_i2c, NULL);
- i2c_put_adapter(i2c_adap);
- if (!isp1301_i2c_client) {
- err("failed to connect I2C to ISP1301 USB Transceiver");
- ret = -ENODEV;
- goto out_i2c_driver;
- }
-
isp1301_configure();

/* Enable USB PLL */
@@ -495,10 +408,7 @@ out3:
out2:
clk_put(usb_clk);
out1:
- i2c_unregister_device(isp1301_i2c_client);
isp1301_i2c_client = NULL;
-out_i2c_driver:
- i2c_del_driver(&isp1301_driver);
out:
return ret;
}
@@ -516,7 +426,6 @@ static int usb_hcd_nxp_remove(struct pla
clk_put(usb_clk);
i2c_unregister_device(isp1301_i2c_client);
isp1301_i2c_client = NULL;
- i2c_del_driver(&isp1301_driver);

platform_set_drvdata(pdev, NULL);

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