1 files changed, 476 insertions, 0 deletions

diff --git a/drivers/usb/host/ohci-pnx4008.c b/drivers/usb/host/ohci-pnx4008.c
new file mode 100644
index 000000000000..82cb22f002e7
--- /dev/null
+++ b/drivers/usb/host/ohci-pnx4008.c
@@ -0,0 +1,476 @@
+/*
+ * drivers/usb/host/ohci-pnx4008.c
+ *
+ * driver for Philips PNX4008 USB Host
+ *
+ * Authors: Dmitry Chigirev <source@mvista.com>
+ *          Vitaly Wool <vitalywool@gmail.com>
+ *
+ * register initialization is based on code examples provided by Philips
+ * Copyright (c) 2005 Koninklijke Philips Electronics N.V.
+ *
+ * NOTE: This driver does not have suspend/resume functionality
+ * This driver is intended for engineering development purposes only
+ *
+ * 2005-2006 (c) MontaVista Software, Inc. This file is licensed under
+ * the terms of the GNU General Public License version 2. This program
+ * is licensed "as is" without any warranty of any kind, whether express
+ * or implied.
+ */
+#include <linux/clk.h>
+#include <linux/platform_device.h>
+#include <linux/i2c.h>
+
+#include <asm/hardware.h>
+#include <asm/io.h>
+#include <asm/mach-types.h>
+
+#include <asm/arch/platform.h>
+#include <asm/arch/irqs.h>
+#include <asm/arch/gpio.h>
+
+#define USB_CTRL        IO_ADDRESS(PNX4008_PWRMAN_BASE + 0x64)
+
+/* USB_CTRL bit defines */
+#define USB_SLAVE_HCLK_EN       (1 << 24)
+#define USB_HOST_NEED_CLK_EN    (1 << 21)
+
+#define USB_OTG_CLK_CTRL        IO_ADDRESS(PNX4008_USB_CONFIG_BASE + 0xFF4)
+#define USB_OTG_CLK_STAT        IO_ADDRESS(PNX4008_USB_CONFIG_BASE + 0xFF8)
+
+/* USB_OTG_CLK_CTRL bit defines */
+#define AHB_M_CLOCK_ON          (1 << 4)
+#define OTG_CLOCK_ON            (1 << 3)
+#define I2C_CLOCK_ON            (1 << 2)
+#define DEV_CLOCK_ON            (1 << 1)
+#define HOST_CLOCK_ON           (1 << 0)
+
+#define USB_OTG_STAT_CONTROL    IO_ADDRESS(PNX4008_USB_CONFIG_BASE + 0x110)
+
+/* USB_OTG_STAT_CONTROL bit defines */
+#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
+
+struct i2c_driver isp1301_driver;
+struct i2c_client *isp1301_i2c_client;
+
+extern int usb_disabled(void);
+extern int ocpi_enable(void);
+
+static struct clk *usb_clk;
+
+static int isp1301_probe(struct i2c_adapter *adap);
+static int isp1301_detach(struct i2c_client *client);
+static int isp1301_command(struct i2c_client *client, unsigned int cmd,
+                           void *arg);
+
+static unsigned short normal_i2c[] =
+    { ISP1301_I2C_ADDR, ISP1301_I2C_ADDR + 1, I2C_CLIENT_END };
+static unsigned short dummy_i2c_addrlist[] = { I2C_CLIENT_END };
+
+static struct i2c_client_address_data addr_data = {
+        .normal_i2c = normal_i2c,
+        .probe = dummy_i2c_addrlist,
+        .ignore = dummy_i2c_addrlist,
+};
+
+struct i2c_driver isp1301_driver = {
+        .id = I2C_DRIVERID_I2CDEV,      /* Fake Id */
+        .class = I2C_CLASS_HWMON,
+        .attach_adapter = isp1301_probe,
+        .detach_client = isp1301_detach,
+        .command = isp1301_command
+};
+
+static int isp1301_attach(struct i2c_adapter *adap, int addr, int kind)
+{
+        struct i2c_client *c;
+
+        c = (struct i2c_client *)kzalloc(sizeof(*c), SLAB_KERNEL);
+
+        if (!c)
+                return -ENOMEM;
+
+        strcpy(c->name, "isp1301");
+        c->flags = 0;
+        c->addr = addr;
+        c->adapter = adap;
+        c->driver = &isp1301_driver;
+
+        isp1301_i2c_client = c;
+
+        return i2c_attach_client(c);
+}
+
+static int isp1301_probe(struct i2c_adapter *adap)
+{
+        return i2c_probe(adap, &addr_data, isp1301_attach);
+}
+
+static int isp1301_detach(struct i2c_client *client)
+{
+        i2c_detach_client(client);
+        kfree(isp1301_i2c_client);
+        return 0;
+}
+
+/* No commands defined */
+static int isp1301_command(struct i2c_client *client, unsigned int cmd,
+                           void *arg)
+{
+        return 0;
+}
+
+static void i2c_write(u8 buf, u8 subaddr)
+{
+        char tmpbuf[2];
+
+        tmpbuf[0] = subaddr;    /*register number */
+        tmpbuf[1] = buf;        /*register data */
+        i2c_master_send(isp1301_i2c_client, &tmpbuf[0], 2);
+}
+
+static void isp1301_configure(void)
+{
+        /* PNX4008 only supports DAT_SE0 USB mode */
+        /* PNX4008 R2A requires setting the MAX603 to output 3.6V */
+        /* Power up externel charge-pump */
+
+        i2c_write(MC1_DAT_SE0 | MC1_SPEED_REG, ISP1301_I2C_MODE_CONTROL_1);
+        i2c_write(~(MC1_DAT_SE0 | MC1_SPEED_REG),
+                  ISP1301_I2C_MODE_CONTROL_1 | ISP1301_I2C_REG_CLEAR_ADDR);
+        i2c_write(MC2_BI_DI | MC2_PSW_EN | MC2_SPD_SUSP_CTRL,
+                  ISP1301_I2C_MODE_CONTROL_2);
+        i2c_write(~(MC2_BI_DI | MC2_PSW_EN | MC2_SPD_SUSP_CTRL),
+                  ISP1301_I2C_MODE_CONTROL_2 | ISP1301_I2C_REG_CLEAR_ADDR);
+        i2c_write(OTG1_DM_PULLDOWN | OTG1_DP_PULLDOWN,
+                  ISP1301_I2C_OTG_CONTROL_1);
+        i2c_write(~(OTG1_DM_PULLDOWN | OTG1_DP_PULLDOWN),
+                  ISP1301_I2C_OTG_CONTROL_1 | ISP1301_I2C_REG_CLEAR_ADDR);
+        i2c_write(0xFF,
+                  ISP1301_I2C_INTERRUPT_LATCH | ISP1301_I2C_REG_CLEAR_ADDR);
+        i2c_write(0xFF,
+                  ISP1301_I2C_INTERRUPT_FALLING | ISP1301_I2C_REG_CLEAR_ADDR);
+        i2c_write(0xFF,
+                  ISP1301_I2C_INTERRUPT_RISING | ISP1301_I2C_REG_CLEAR_ADDR);
+
+}
+
+static inline void isp1301_vbus_on(void)
+{
+        i2c_write(OTG1_VBUS_DRV, ISP1301_I2C_OTG_CONTROL_1);
+}
+
+static inline void isp1301_vbus_off(void)
+{
+        i2c_write(OTG1_VBUS_DRV,
+                  ISP1301_I2C_OTG_CONTROL_1 | ISP1301_I2C_REG_CLEAR_ADDR);
+}
+
+static void pnx4008_start_hc(void)
+{
+        unsigned long tmp = __raw_readl(USB_OTG_STAT_CONTROL) | HOST_EN;
+        __raw_writel(tmp, USB_OTG_STAT_CONTROL);
+        isp1301_vbus_on();
+}
+
+static void pnx4008_stop_hc(void)
+{
+        unsigned long tmp;
+        isp1301_vbus_off();
+        tmp = __raw_readl(USB_OTG_STAT_CONTROL) & ~HOST_EN;
+        __raw_writel(tmp, USB_OTG_STAT_CONTROL);
+}
+
+static int __devinit ohci_pnx4008_start(struct usb_hcd *hcd)
+{
+        struct ohci_hcd *ohci = hcd_to_ohci(hcd);
+        int ret;
+
+        if ((ret = ohci_init(ohci)) < 0)
+                return ret;
+
+        if ((ret = ohci_run(ohci)) < 0) {
+                dev_err(hcd->self.controller, "can't start\n");
+                ohci_stop(hcd);
+                return ret;
+        }
+        return 0;
+}
+
+static const struct hc_driver ohci_pnx4008_hc_driver = {
+        .description = hcd_name,
+        .product_desc =         "pnx4008 OHCI",
+
+        /*
+         * generic hardware linkage
+         */
+        .irq = ohci_irq,
+        .flags = HCD_USB11 | HCD_MEMORY,
+
+        .hcd_priv_size =        sizeof(struct ohci_hcd),
+        /*
+         * basic lifecycle operations
+         */
+        .start = ohci_pnx4008_start,
+        .stop = ohci_stop,
+
+        /*
+         * managing i/o requests and associated device resources
+         */
+        .urb_enqueue = ohci_urb_enqueue,
+        .urb_dequeue = ohci_urb_dequeue,
+        .endpoint_disable = ohci_endpoint_disable,
+
+        /*
+         * scheduling support
+         */
+        .get_frame_number = ohci_get_frame,
+
+        /*
+         * root hub support
+         */
+        .hub_status_data = ohci_hub_status_data,
+        .hub_control = ohci_hub_control,
+
+        .start_port_reset = ohci_start_port_reset,
+};
+
+#define USB_CLOCK_MASK (AHB_M_CLOCK_ON| OTG_CLOCK_ON | HOST_CLOCK_ON | I2C_CLOCK_ON)
+
+static void pnx4008_set_usb_bits(void)
+{
+        start_int_set_falling_edge(SE_USB_OTG_ATX_INT_N);
+        start_int_ack(SE_USB_OTG_ATX_INT_N);
+        start_int_umask(SE_USB_OTG_ATX_INT_N);
+
+        start_int_set_rising_edge(SE_USB_OTG_TIMER_INT);
+        start_int_ack(SE_USB_OTG_TIMER_INT);
+        start_int_umask(SE_USB_OTG_TIMER_INT);
+
+        start_int_set_rising_edge(SE_USB_I2C_INT);
+        start_int_ack(SE_USB_I2C_INT);
+        start_int_umask(SE_USB_I2C_INT);
+
+        start_int_set_rising_edge(SE_USB_INT);
+        start_int_ack(SE_USB_INT);
+        start_int_umask(SE_USB_INT);
+
+        start_int_set_rising_edge(SE_USB_NEED_CLK_INT);
+        start_int_ack(SE_USB_NEED_CLK_INT);
+        start_int_umask(SE_USB_NEED_CLK_INT);
+
+        start_int_set_rising_edge(SE_USB_AHB_NEED_CLK_INT);
+        start_int_ack(SE_USB_AHB_NEED_CLK_INT);
+        start_int_umask(SE_USB_AHB_NEED_CLK_INT);
+}
+
+static void pnx4008_unset_usb_bits(void)
+{
+        start_int_mask(SE_USB_OTG_ATX_INT_N);
+        start_int_mask(SE_USB_OTG_TIMER_INT);
+        start_int_mask(SE_USB_I2C_INT);
+        start_int_mask(SE_USB_INT);
+        start_int_mask(SE_USB_NEED_CLK_INT);
+        start_int_mask(SE_USB_AHB_NEED_CLK_INT);
+}
+
+static int __devinit usb_hcd_pnx4008_probe(struct platform_device *pdev)
+{
+        struct usb_hcd *hcd = 0;
+        struct ohci_hcd *ohci;
+        const struct hc_driver *driver = &ohci_pnx4008_hc_driver;
+
+        int ret = 0, irq;
+
+        dev_dbg(&pdev->dev, "%s: " DRIVER_INFO " (pnx4008)\n", hcd_name);
+        if (usb_disabled()) {
+                err("USB is disabled");
+                ret = -ENODEV;
+                goto out;
+        }
+
+        if (pdev->num_resources != 2
+            || pdev->resource[0].flags != IORESOURCE_MEM
+            || pdev->resource[1].flags != IORESOURCE_IRQ) {
+                err("Invalid resource configuration");
+                ret = -ENODEV;
+                goto out;
+        }
+
+        /* Enable AHB slave USB clock, needed for further USB clock control */
+        __raw_writel(USB_SLAVE_HCLK_EN | (1 << 19), USB_CTRL);
+
+        ret = i2c_add_driver(&isp1301_driver);
+        if (ret < 0) {
+                err("failed to connect I2C to ISP1301 USB Transceiver");
+                goto out;
+        }
+
+        isp1301_configure();
+
+        /* Enable USB PLL */
+        usb_clk = clk_get(&pdev->dev, "ck_pll5");
+        if (IS_ERR(usb_clk)) {
+                err("failed to acquire USB PLL");
+                ret = PTR_ERR(usb_clk);
+                goto out1;
+        }
+
+        ret = clk_enable(usb_clk);
+        if (ret < 0) {
+                err("failed to start USB PLL");
+                goto out2;
+        }
+
+        ret = clk_set_rate(usb_clk, 48000);
+        if (ret < 0) {
+                err("failed to set USB clock rate");
+                goto out3;
+        }
+
+        __raw_writel(__raw_readl(USB_CTRL) | USB_HOST_NEED_CLK_EN, USB_CTRL);
+
+        /* Set to enable all needed USB clocks */
+        __raw_writel(USB_CLOCK_MASK, USB_OTG_CLK_CTRL);
+
+        while ((__raw_readl(USB_OTG_CLK_STAT) & USB_CLOCK_MASK) !=
+               USB_CLOCK_MASK) ;
+
+        hcd = usb_create_hcd (driver, &pdev->dev, pdev->dev.bus_id);
+        if (!hcd) {
+                err("Failed to allocate HC buffer");
+                ret = -ENOMEM;
+                goto out3;
+        }
+
+        /* Set all USB bits in the Start Enable register */
+        pnx4008_set_usb_bits();
+
+        hcd->rsrc_start = pdev->resource[0].start;
+        hcd->rsrc_len = pdev->resource[0].end - pdev->resource[0].start + 1;
+        if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len, hcd_name)) {
+                dev_dbg(&pdev->dev, "request_mem_region failed\n");
+                ret =  -ENOMEM;
+                goto out4;
+        }
+        hcd->regs = (void __iomem *)pdev->resource[0].start;
+
+        irq = platform_get_irq(pdev, 0);
+        if (irq < 0) {
+                ret = -ENXIO;
+                goto out4;
+        }
+
+        hcd->self.hcpriv = (void *)hcd;
+
+        pnx4008_start_hc();
+        platform_set_drvdata(pdev, hcd);
+        ohci = hcd_to_ohci(hcd);
+        ohci_hcd_init(ohci);
+
+        dev_info(&pdev->dev, "at 0x%p, irq %d\n", hcd->regs, hcd->irq);
+        ret = usb_add_hcd(hcd, irq, SA_INTERRUPT);
+        if (ret == 0)
+                return ret;
+
+        pnx4008_stop_hc();
+out4:
+        pnx4008_unset_usb_bits();
+        usb_put_hcd(hcd);
+out3:
+        clk_disable(usb_clk);
+out2:
+        clk_put(usb_clk);
+out1:
+        i2c_del_driver(&isp1301_driver);
+out:
+        return ret;
+}
+
+static int usb_hcd_pnx4008_remove(struct platform_device *pdev)
+{
+        struct usb_hcd *hcd = platform_get_drvdata(pdev);
+
+        usb_remove_hcd(hcd);
+        pnx4008_stop_hc();
+        release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
+        usb_put_hcd(hcd);
+        pnx4008_unset_usb_bits();
+        clk_disable(usb_clk);
+        clk_put(usb_clk);
+        i2c_del_driver(&isp1301_driver);
+
+        platform_set_drvdata(pdev, NULL);
+
+        return 0;
+}
+
+static struct platform_driver usb_hcd_pnx4008_driver = {
+        .driver = {
+                .name = "usb-ohci",
+        },
+        .probe = usb_hcd_pnx4008_probe,
+        .remove = usb_hcd_pnx4008_remove,
+};
+
+static int __init usb_hcd_pnx4008_init(void)
+{
+        return platform_driver_register(&usb_hcd_pnx4008_driver);
+}
+
+static void __exit usb_hcd_pnx4008_cleanup(void)
+{
+        return platform_driver_unregister(&usb_hcd_pnx4008_driver);
+}
+
+module_init(usb_hcd_pnx4008_init);
+module_exit(usb_hcd_pnx4008_cleanup);