#include <linux/usb.h>
#include <linux/platform_device.h>
+#include <asm/bootinfo.h>
#include <asm/io.h>
#include <asm/irq.h>
#include <asm/system.h>
MODULE_LICENSE("GPL");
MODULE_AUTHOR("Jeroen Vreeken (pe1rxq@amsat.org)");
+#define PFX "adm5120-hcd: "
+
#define ADMHCD_REG_CONTROL 0x00
+#define ADMHCD_SW_RESET 0x00000008 /* Reset */
+#define ADMHCD_DMAA 0x00000004 /* DMA arbitration control */
+#define ADMHCD_SW_INTREQ 0x00000002 /* request software int */
+#define ADMHCD_HOST_EN 0x00000001 /* Host enable */
#define ADMHCD_REG_INTSTATUS 0x04
+#define ADMHCD_INT_ACT 0x80000000 /* Interrupt active */
+#define ADMHCD_INT_FATAL 0x40000000 /* Fatal interrupt */
+#define ADMHCD_INT_SW 0x20000000 /* software interrupt */
+#define ADMHCD_INT_TD 0x00100000 /* TD completed */
+#define ADMHCD_FNO 0x00000800 /* Frame number overaflow */
+#define ADMHCD_SO 0x00000400 /* Scheduling overrun */
+#define ADMHCD_INSMI 0x00000200 /* Root hub status change */
+#define ADMHCD_BABI 0x00000100 /* Babble detected, host mode */
+#define ADMHCD_RESI 0x00000020 /* Resume detected */
+#define ADMHCD_SOFI 0x00000010 /* SOF transmitted/received, host mode */
#define ADMHCD_REG_INTENABLE 0x08
+#define ADMHCD_INT_EN 0x80000000 /* Interrupt enable */
+#define ADMHCD_INTMASK 0x00000001 /* Interrupt mask */
#define ADMHCD_REG_HOSTCONTROL 0x10
+#define ADMHCD_DMA_EN 0x00000004 /* USB host DMA enable */
+#define ADMHCD_STATE_RST 0x00000000 /* bus state reset */
+#define ADMHCD_STATE_RES 0x00000001 /* bus state resume */
+#define ADMHCD_STATE_OP 0x00000002 /* bus state operational */
+#define ADMHCD_STATE_SUS 0x00000003 /* bus state suspended */
#define ADMHCD_REG_FMINTERVAL 0x18
#define ADMHCD_REG_FMNUMBER 0x1c
#define ADMHCD_REG_LSTHRESH 0x70
#define ADMHCD_REG_RHDESCR 0x74
+#define ADMHCD_CRWE 0x20000000 /* Clear wakeup enable */
+#define ADMHCD_DRWE 0x10000000 /* Device remote wakeup enable */
+#define ADMHCD_HW_OCIC 0x08000000 /* Over current indication change */
+#define ADMHCD_LPSC 0x04000000 /* Local power switch change */
+#define ADMHCD_OCI 0x02000000 /* Over current indication */
+#define ADMHCD_LPS 0x01000000 /* Local power switch/global power switch */
+#define ADMHCD_NOCP 0x00000800 /* No over current protect mode */
+#define ADMHCD_OPCM 0x00000400 /* Over current protect mode */
+#define ADMHCD_NPS 0x00000200 /* No Power Switch */
+#define ADMHCD_PSM 0x00000100 /* Power switch mode */
#define ADMHCD_REG_PORTSTATUS0 0x78
+#define ADMHCD_CCS 0x00000001 /* current connect status */
+#define ADMHCD_PES 0x00000002 /* port enable status */
+#define ADMHCD_PSS 0x00000004 /* port suspend status */
+#define ADMHCD_POCI 0x00000008 /* port overcurrent indicator */
+#define ADMHCD_PRS 0x00000010 /* port reset status */
+#define ADMHCD_PPS 0x00000100 /* port power status */
+#define ADMHCD_LSDA 0x00000200 /* low speed device attached */
+#define ADMHCD_CSC 0x00010000 /* connect status change */
+#define ADMHCD_PESC 0x00020000 /* enable status change */
+#define ADMHCD_PSSC 0x00040000 /* suspend status change */
+#define ADMHCD_OCIC 0x00080000 /* overcurrent change*/
+#define ADMHCD_PRSC 0x00100000 /* reset status change */
#define ADMHCD_REG_PORTSTATUS1 0x7c
#define ADMHCD_REG_HOSTHEAD 0x80
#define ADMHCD_NUMPORTS 2
-#define ADMHCD_HOST_EN 0x00000001 /* Host enable */
-#define ADMHCD_SW_INTREQ 0x00000002 /* request software int */
-#define ADMHCD_SW_RESET 0x00000008 /* Reset */
-
-#define ADMHCD_INT_TD 0x00100000 /* TD completed */
-#define ADMHCD_INT_SW 0x20000000 /* software interrupt */
-#define ADMHCD_INT_FATAL 0x40000000 /* Fatal interrupt */
-#define ADMHCD_INT_ACT 0x80000000 /* Interrupt active */
-
-#define ADMHCD_STATE_RST 0x00000000 /* bus state reset */
-#define ADMHCD_STATE_RES 0x00000001 /* bus state resume */
-#define ADMHCD_STATE_OP 0x00000002 /* bus state operational */
-#define ADMHCD_STATE_SUS 0x00000003 /* bus state suspended */
-#define ADMHCD_DMA_EN 0x00000004 /* enable dma engine */
-
-#define ADMHCD_NPS 0x00000020 /* No Power Switch */
-#define ADMHCD_LPSC 0x04000000 /* Local power switch change */
-
-#define ADMHCD_CCS 0x00000001 /* current connect status */
-#define ADMHCD_PES 0x00000002 /* port enable status */
-#define ADMHCD_PSS 0x00000004 /* port suspend status */
-#define ADMHCD_POCI 0x00000008 /* port overcurrent indicator */
-#define ADMHCD_PRS 0x00000010 /* port reset status */
-#define ADMHCD_PPS 0x00000100 /* port power status */
-#define ADMHCD_LSDA 0x00000200 /* low speed device attached */
-#define ADMHCD_CSC 0x00010000 /* connect status change */
-#define ADMHCD_PESC 0x00020000 /* enable status change */
-#define ADMHCD_PSSC 0x00040000 /* suspend status change */
-#define ADMHCD_OCIC 0x00080000 /* overcurrent change*/
-#define ADMHCD_PRSC 0x00100000 /* reset status change */
-
-
struct admhcd_ed {
/* Don't change first four, they used for DMA */
u32 control;
struct admhcd {
spinlock_t lock;
- void __iomem *addr_reg;
void __iomem *data_reg;
/* Root hub registers */
u32 rhdesca;
ahcd->dma_en |= ADMHCD_DMA_EN;
}
-static irqreturn_t adm5120hcd_irq(int irq, void *ptr, struct pt_regs *regs)
+static irqreturn_t adm5120hcd_irq(struct usb_hcd *hcd)
{
- struct usb_hcd *hcd = (struct usb_hcd *)ptr;
struct admhcd *ahcd = hcd_to_admhcd(hcd);
u32 intstatus;
return retval;
}
+static int admhcd_start(struct usb_hcd *hcd)
+{
+ struct admhcd *ahcd = hcd_to_admhcd(hcd);
+ unsigned long flags;
+
+ printk(KERN_DEBUG PFX "calling admhcd_start\n");
+
+ spin_lock_irqsave(&ahcd->lock, flags);
+
+ /* Initialise the HCD registers */
+ admhcd_reg_set(ahcd, ADMHCD_REG_INTENABLE, 0);
+ mdelay(10);
+
+ admhcd_reg_set(ahcd, ADMHCD_REG_CONTROL, ADMHCD_SW_RESET);
+
+ while (admhcd_reg_get(ahcd, ADMHCD_REG_CONTROL) & ADMHCD_SW_RESET) {
+ printk(KERN_WARNING PFX "waiting for reset to complete\n");
+ mdelay(1);
+ }
+
+ hcd->uses_new_polling = 1;
+
+ /* Enable USB host mode */
+ admhcd_reg_set(ahcd, ADMHCD_REG_CONTROL, ADMHCD_HOST_EN);
+
+ /* Set host specific settings */
+ admhcd_reg_set(ahcd, ADMHCD_REG_HOSTHEAD, 0x00000000);
+ admhcd_reg_set(ahcd, ADMHCD_REG_FMINTERVAL, 0x20002edf);
+ admhcd_reg_set(ahcd, ADMHCD_REG_LSTHRESH, 0x628);
+
+ /* Set interrupts */
+ admhcd_reg_set(ahcd, ADMHCD_REG_INTENABLE,
+ ADMHCD_INT_ACT | ADMHCD_INT_FATAL | ADMHCD_INT_SW | ADMHCD_INT_TD);
+ admhcd_reg_set(ahcd, ADMHCD_REG_INTSTATUS,
+ ADMHCD_INT_ACT | ADMHCD_INT_FATAL | ADMHCD_INT_SW | ADMHCD_INT_TD);
+
+ /* Power on all ports */
+ admhcd_reg_set(ahcd, ADMHCD_REG_RHDESCR, ADMHCD_NPS | ADMHCD_LPSC);
+
+ /* HCD is now operationnal */
+ admhcd_reg_set(ahcd, ADMHCD_REG_HOSTCONTROL, ADMHCD_STATE_OP);
+
+ hcd->state = HC_STATE_RUNNING;
+
+ spin_unlock_irqrestore(&ahcd->lock, flags);
+
+ printk(KERN_DEBUG PFX "returning 0 from admhcd_start\n");
+ return 0;
+}
+
+static int admhcd_sw_reset(struct admhcd *ahcd)
+{
+ int retries = 15;
+ unsigned long flags;
+ int ret = 0;
+
+ spin_lock_irqsave(&ahcd->lock, flags);
+
+ admhcd_reg_set(ahcd, ADMHCD_REG_INTENABLE, 0);
+ mdelay(10);
+
+ admhcd_reg_set(ahcd, ADMHCD_REG_CONTROL, ADMHCD_SW_RESET);
+
+ while (--retries) {
+ mdelay(1);
+ if (!(admhcd_reg_get(ahcd, ADMHCD_REG_CONTROL) & ADMHCD_SW_RESET))
+ break;
+ }
+ if (!retries) {
+ printk(KERN_WARNING "%s: software reset timeout\n", hcd_name);
+ ret = -ETIME;
+ }
+ spin_unlock_irqrestore(&ahcd->lock, flags);
+ return ret;
+}
+
+static int admhcd_reset(struct usb_hcd *hcd)
+{
+ struct admhcd *ahcd = hcd_to_admhcd(hcd);
+ u32 val = 0;
+ int ret, timeout = 15; /* ms */
+ unsigned long t;
+
+ ret = admhcd_sw_reset(ahcd);
+ if (ret)
+ return ret;
+
+ t = jiffies + msecs_to_jiffies(timeout);
+ while (time_before_eq(jiffies, t)) {
+ msleep(4);
+ spin_lock_irq(&ahcd->lock);
+ val = admhcd_reg_get(ahcd, ADMHCD_REG_HOSTCONTROL) & ADMHCD_STATE_RST;
+ spin_unlock_irq(&ahcd->lock);
+ if (val)
+ break;
+ }
+ if (!val) {
+ printk(KERN_WARNING "%s: device not ready after %dms\n",
+ hcd_name, timeout);
+ ret = -ENODEV;
+ }
+ return ret;
+}
+
+static void admhcd_stop(struct usb_hcd *hcd)
+{
+ struct admhcd *ahcd = hcd_to_admhcd(hcd);
+ unsigned long flags;
+ u32 val;
+
+ spin_lock_irqsave(&ahcd->lock, flags);
+ admhcd_reg_set(ahcd, ADMHCD_REG_INTENABLE, 0);
+
+ /* Set global control of power for ports */
+ val = admhcd_reg_get(ahcd, ADMHCD_REG_RHDESCR);
+ val &= (~ADMHCD_PSM | ADMHCD_LPS);
+ admhcd_reg_set(ahcd, ADMHCD_REG_RHDESCR, val);
+
+ spin_unlock_irqrestore(&ahcd->lock, flags);
+
+ /* Ask for software reset */
+ admhcd_sw_reset(ahcd);
+}
+
+
static struct hc_driver adm5120_hc_driver = {
.description = hcd_name,
.product_desc = "ADM5120 HCD",
.hcd_priv_size = sizeof(struct admhcd),
+ .irq = adm5120hcd_irq,
.flags = HCD_USB11,
.urb_enqueue = admhcd_urb_enqueue,
.urb_dequeue = admhcd_urb_dequeue,
.get_frame_number = admhcd_get_frame_number,
.hub_status_data = admhcd_hub_status_data,
.hub_control = admhcd_hub_control,
+ .start = admhcd_start,
+ .stop = admhcd_stop,
+ .reset = admhcd_reset,
};
#define resource_len(r) (((r)->end - (r)->start) + 1)
static int __init adm5120hcd_probe(struct platform_device *pdev)
{
- struct usb_hcd *hcd;
- struct admhcd *ahcd;
- struct resource *addr, *data;
- void __iomem *addr_reg;
+ struct usb_hcd *hcd;
+ struct admhcd *ahcd;
+ struct resource *data;
void __iomem *data_reg;
- int irq, err = 0;
- if (pdev->num_resources < 3) {
+ int err = 0, irq;
+
+ if (pdev->num_resources < 2) {
+ printk(KERN_WARNING PFX "not enough resources\n");
err = -ENODEV;
goto out;
- }
+ }
- data = platform_get_resource(pdev, IORESOURCE_MEM, 0);
- addr = platform_get_resource(pdev, IORESOURCE_MEM, 1);
irq = platform_get_irq(pdev, 0);
-
- if (!addr || !data || irq < 0) {
- err = -ENODEV;
- goto out;
- }
+ data = platform_get_resource(pdev, IORESOURCE_MEM, 0);
if (pdev->dev.dma_mask) {
- printk(KERN_DEBUG "DMA not supported\n");
- err = -EINVAL;
- goto out;
- }
+ printk(KERN_DEBUG PFX "no we won't dma\n");
+ return -EINVAL;
+ }
+
+ if (!data || irq < 0) {
+ printk(KERN_DEBUG PFX "either IRQ or data resource is invalid\n");
+ err = -ENODEV;
+ goto out;
+ }
+
+ if (!request_mem_region(data->start, resource_len(data), hcd_name)) {
+ printk(KERN_DEBUG PFX "cannot request memory regions for the data resource\n");
+ err = -EBUSY;
+ goto out;
+ }
+
+ data_reg = ioremap(data->start, resource_len(data));
+ if (data_reg == NULL) {
+ printk(KERN_DEBUG PFX "unable to ioremap\n");
+ err = -ENOMEM;
+ goto out_mem;
+ }
- if (!request_mem_region(addr->start, 2, hcd_name)) {
- err = -EBUSY;
- goto out;
- }
- addr_reg = ioremap(addr->start, resource_len(addr));
- if (addr_reg == NULL) {
- err = -ENOMEM;
- goto out_mem;
- }
- if (!request_mem_region(data->start, 2, hcd_name)) {
- err = -EBUSY;
- goto out_unmap;
- }
- data_reg = ioremap(data->start, resource_len(data));
- if (data_reg == NULL) {
+ hcd = usb_create_hcd(&adm5120_hc_driver, &pdev->dev, pdev->dev.bus_id);
+ if (!hcd) {
+ printk(KERN_DEBUG PFX "unable to create the hcd\n");
err = -ENOMEM;
- goto out_mem;
+ goto out_unmap;
}
-
- hcd = usb_create_hcd(&adm5120_hc_driver, &pdev->dev, pdev->dev.bus_id);
- if (!hcd)
- goto out_mem;
+ hcd->rsrc_start = data->start;
+ hcd->rsrc_len = resource_len(data);
+ hcd->regs = data_reg;
ahcd = hcd_to_admhcd(hcd);
ahcd->data_reg = data_reg;
- ahcd->addr_reg = addr_reg;
+ ahcd->base = (u32)data_reg;
+
spin_lock_init(&ahcd->lock);
INIT_LIST_HEAD(&ahcd->async);
- /* Initialise the HCD registers */
- admhcd_reg_set(ahcd, ADMHCD_REG_INTENABLE, 0);
- mdelay(10);
- admhcd_reg_set(ahcd, ADMHCD_REG_CONTROL, ADMHCD_SW_RESET);
- while (admhcd_reg_get(ahcd, ADMHCD_REG_CONTROL) & ADMHCD_SW_RESET)
- mdelay(1);
-
- admhcd_reg_set(ahcd, ADMHCD_REG_CONTROL, ADMHCD_HOST_EN);
- admhcd_reg_set(ahcd, ADMHCD_REG_HOSTHEAD, 0x00000000);
- admhcd_reg_set(ahcd, ADMHCD_REG_FMINTERVAL, 0x20002edf);
- admhcd_reg_set(ahcd, ADMHCD_REG_LSTHRESH, 0x628);
- admhcd_reg_set(ahcd, ADMHCD_REG_INTENABLE,
- ADMHCD_INT_ACT | ADMHCD_INT_FATAL | ADMHCD_INT_SW | ADMHCD_INT_TD);
- admhcd_reg_set(ahcd, ADMHCD_REG_INTSTATUS,
- ADMHCD_INT_ACT | ADMHCD_INT_FATAL | ADMHCD_INT_SW | ADMHCD_INT_TD);
- admhcd_reg_set(ahcd, ADMHCD_REG_RHDESCR, ADMHCD_NPS | ADMHCD_LPSC);
- admhcd_reg_set(ahcd, ADMHCD_REG_HOSTCONTROL, ADMHCD_STATE_OP);
+ hcd->product_desc = "ADM5120 HCD";
err = usb_add_hcd(hcd, irq, IRQF_DISABLED);
- if (err)
+ if (err) {
+ printk(KERN_DEBUG PFX "unable to add hcd\n");
goto out_dev;
+ }
return 0;
out_dev:
usb_put_hcd(hcd);
out_unmap:
- iounmap(addr_reg);
+ iounmap(data_reg);
out_mem:
- release_mem_region(addr->start, 2);
+ release_mem_region(pdev->resource[0].start, pdev->resource[0].end - pdev->resource[0].start +1);
out:
return err;
}
+#ifdef CONFIG_PM
+static int adm5120hcd_suspend(struct platform_device *pdev, pm_message_t state)
+{
+ pdev-dev.power.power_state = state;
+ mdelay(1);
+ return 0;
+}
+
+static int adm5120hcd_resume(struct platform_device *pdev, pm_message_t state)
+{
+ pdev->dev.power.power_state = PMSG_ON;
+ mdelay(1);
+ return 0;
+}
+#else
+#define adm5120hcd_suspend NULL
+#define adm5120hcd_resume NULL
+#endif
+
static int __init_or_module adm5120hcd_remove(struct platform_device *pdev)
{
struct usb_hcd *hcd = platform_get_drvdata(pdev);
static struct platform_driver adm5120hcd_driver = {
.probe = adm5120hcd_probe,
.remove = adm5120hcd_remove,
+ .suspend = adm5120hcd_suspend,
+ .remove = adm5120hcd_resume,
.driver = {
- .name = "adm5120-hcd",
+ .name = (char *)hcd_name,
.owner = THIS_MODULE,
},
};
static int __init adm5120hcd_init(void)
{
- if (usb_disabled())
+ int ret;
+
+ if (usb_disabled()) {
+ printk(KERN_DEBUG PFX "USB support is disabled\n");
return -ENODEV;
- if (!adm5120_board.has_usb)
+ }
+
+ if (mips_machgroup != MACH_GROUP_ADM5120) {
+ printk(KERN_DEBUG PFX "unsupported machine group\n");
return -ENODEV;
+ }
- return platform_driver_register(&adm5120hcd_driver);
+ ret = platform_driver_register(&adm5120hcd_driver);
+ if (ret == 0)
+ printk(KERN_INFO PFX "registered\n");
+
+ return ret;
}
static void __exit adm5120hcd_exit(void)
{
platform_driver_unregister(&adm5120hcd_driver);
+ printk(KERN_INFO PFX "driver unregistered\n");
}
module_init(adm5120hcd_init);
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