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usb:hsotg:samsung: Determine number of EPs from HW configuration register

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This commit adds support for determining of EPs number during run time.

Configuration is read from a HW configuration register in a specially
created s3c_hsotg_hw_cfg function.

Moreover it was necessary to defer at probe allocation of the
struct s3c_hsotg_ep instances until number of endpoints is known.

Signed-off-by: Lukasz Majewski <l.majewski@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
This commit is contained in:
Lukasz Majewski 2012-05-04 14:17:09 +02:00 committed by Felipe Balbi
parent 12a1f4dc0d
commit b3f489b2b6
1 changed files with 101 additions and 68 deletions
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169
drivers/usb/gadget/s3c-hsotg.c
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@ -128,8 +128,6 @@ struct s3c_hsotg_ep {
char name[10];
};
#define S3C_HSOTG_EPS (8+1) /* limit to 9 for the moment */
/**
* struct s3c_hsotg - driver state.
* @dev: The parent device supplied to the probe function
@ -140,6 +138,7 @@ struct s3c_hsotg_ep {
* @irq: The IRQ number we are using
* @supplies: Definition of USB power supplies
* @dedicated_fifos: Set if the hardware has dedicated IN-EP fifos.
* @num_of_eps: Number of available EPs (excluding EP0)
* @debug_root: root directrory for debugfs.
* @debug_file: main status file for debugfs.
* @debug_fifo: FIFO status file for debugfs.
@ -164,6 +163,7 @@ struct s3c_hsotg {
struct regulator_bulk_data supplies[ARRAY_SIZE(s3c_hsotg_supply_names)];
unsigned int dedicated_fifos:1;
unsigned char num_of_eps;
struct dentry *debug_root;
struct dentry *debug_file;
@ -177,7 +177,7 @@ struct s3c_hsotg {
struct usb_gadget gadget;
unsigned int setup;
unsigned long last_rst;
struct s3c_hsotg_ep eps[];
struct s3c_hsotg_ep *eps;
};
/**
@ -952,7 +952,7 @@ static struct s3c_hsotg_ep *ep_from_windex(struct s3c_hsotg *hsotg,
if (windex >= 0x100)
return NULL;
if (idx > S3C_HSOTG_EPS)
if (idx > hsotg->num_of_eps)
return NULL;
if (idx && ep->dir_in != dir)
@ -2036,7 +2036,7 @@ static void s3c_hsotg_irq_enumdone(struct s3c_hsotg *hsotg)
if (ep0_mps) {
int i;
s3c_hsotg_set_ep_maxpacket(hsotg, 0, ep0_mps);
for (i = 1; i < S3C_HSOTG_EPS; i++)
for (i = 1; i < hsotg->num_of_eps; i++)
s3c_hsotg_set_ep_maxpacket(hsotg, i, ep_mps);
}
@ -2099,7 +2099,7 @@ static void s3c_hsotg_disconnect(struct s3c_hsotg *hsotg)
{
unsigned ep;
for (ep = 0; ep < S3C_HSOTG_EPS; ep++)
for (ep = 0; ep < hsotg->num_of_eps; ep++)
kill_all_requests(hsotg, &hsotg->eps[ep], -ESHUTDOWN, true);
call_gadget(hsotg, disconnect);
@ -2117,7 +2117,7 @@ static void s3c_hsotg_irq_fifoempty(struct s3c_hsotg *hsotg, bool periodic)
/* look through for any more data to transmit */
for (epno = 0; epno < S3C_HSOTG_EPS; epno++) {
for (epno = 0; epno < hsotg->num_of_eps; epno++) {
ep = &hsotg->eps[epno];
if (!ep->dir_in)
@ -2783,6 +2783,45 @@ static void s3c_hsotg_phy_disable(struct s3c_hsotg *hsotg)
hsotg->plat->phy_exit(pdev, hsotg->plat->phy_type);
}
static void s3c_hsotg_init(struct s3c_hsotg *hsotg)
{
/* unmask subset of endpoint interrupts */
writel(S3C_DIEPMSK_TimeOUTMsk | S3C_DIEPMSK_AHBErrMsk |
S3C_DIEPMSK_EPDisbldMsk | S3C_DIEPMSK_XferComplMsk,
hsotg->regs + S3C_DIEPMSK);
writel(S3C_DOEPMSK_SetupMsk | S3C_DOEPMSK_AHBErrMsk |
S3C_DOEPMSK_EPDisbldMsk | S3C_DOEPMSK_XferComplMsk,
hsotg->regs + S3C_DOEPMSK);
writel(0, hsotg->regs + S3C_DAINTMSK);
/* Be in disconnected state until gadget is registered */
__orr32(hsotg->regs + S3C_DCTL, S3C_DCTL_SftDiscon);
if (0) {
/* post global nak until we're ready */
writel(S3C_DCTL_SGNPInNAK | S3C_DCTL_SGOUTNak,
hsotg->regs + S3C_DCTL);
}
/* setup fifos */
dev_dbg(hsotg->dev, "GRXFSIZ=0x%08x, GNPTXFSIZ=0x%08x\n",
readl(hsotg->regs + S3C_GRXFSIZ),
readl(hsotg->regs + S3C_GNPTXFSIZ));
s3c_hsotg_init_fifo(hsotg);
/* set the PLL on, remove the HNP/SRP and set the PHY */
writel(S3C_GUSBCFG_PHYIf16 | S3C_GUSBCFG_TOutCal(7) | (0x5 << 10),
hsotg->regs + S3C_GUSBCFG);
writel(using_dma(hsotg) ? S3C_GAHBCFG_DMAEn : 0x0,
hsotg->regs + S3C_GAHBCFG);
}
static int s3c_hsotg_start(struct usb_gadget_driver *driver,
int (*bind)(struct usb_gadget *))
{
@ -2853,7 +2892,7 @@ static int s3c_hsotg_stop(struct usb_gadget_driver *driver)
return -EINVAL;
/* all endpoints should be shutdown */
for (ep = 0; ep < S3C_HSOTG_EPS; ep++)
for (ep = 0; ep < hsotg->num_of_eps; ep++)
s3c_hsotg_ep_disable(&hsotg->eps[ep].ep);
call_gadget(hsotg, disconnect);
@ -2944,53 +2983,28 @@ static void __devinit s3c_hsotg_initep(struct s3c_hsotg *hsotg,
}
}
static void s3c_hsotg_init(struct s3c_hsotg *hsotg)
/**
* s3c_hsotg_hw_cfg - read HW configuration registers
* @param: The device state
*
* Read the USB core HW configuration registers
*/
static void s3c_hsotg_hw_cfg(struct s3c_hsotg *hsotg)
{
u32 cfg4;
/* unmask subset of endpoint interrupts */
writel(S3C_DIEPMSK_TimeOUTMsk | S3C_DIEPMSK_AHBErrMsk |
S3C_DIEPMSK_EPDisbldMsk | S3C_DIEPMSK_XferComplMsk,
hsotg->regs + S3C_DIEPMSK);
writel(S3C_DOEPMSK_SetupMsk | S3C_DOEPMSK_AHBErrMsk |
S3C_DOEPMSK_EPDisbldMsk | S3C_DOEPMSK_XferComplMsk,
hsotg->regs + S3C_DOEPMSK);
writel(0, hsotg->regs + S3C_DAINTMSK);
/* Be in disconnected state until gadget is registered */
__orr32(hsotg->regs + S3C_DCTL, S3C_DCTL_SftDiscon);
if (0) {
/* post global nak until we're ready */
writel(S3C_DCTL_SGNPInNAK | S3C_DCTL_SGOUTNak,
hsotg->regs + S3C_DCTL);
}
/* setup fifos */
dev_dbg(hsotg->dev, "GRXFSIZ=0x%08x, GNPTXFSIZ=0x%08x\n",
readl(hsotg->regs + S3C_GRXFSIZ),
readl(hsotg->regs + S3C_GNPTXFSIZ));
s3c_hsotg_init_fifo(hsotg);
/* set the PLL on, remove the HNP/SRP and set the PHY */
writel(S3C_GUSBCFG_PHYIf16 | S3C_GUSBCFG_TOutCal(7) | (0x5 << 10),
hsotg->regs + S3C_GUSBCFG);
writel(using_dma(hsotg) ? S3C_GAHBCFG_DMAEn : 0x0,
hsotg->regs + S3C_GAHBCFG);
u32 cfg2, cfg4;
/* check hardware configuration */
cfg2 = readl(hsotg->regs + 0x48);
hsotg->num_of_eps = (cfg2 >> 10) & 0xF;
dev_info(hsotg->dev, "EPs:%d\n", hsotg->num_of_eps);
cfg4 = readl(hsotg->regs + 0x50);
hsotg->dedicated_fifos = (cfg4 >> 25) & 1;
dev_info(hsotg->dev, "%s fifos\n",
hsotg->dedicated_fifos ? "dedicated" : "shared");
}
static void s3c_hsotg_dump(struct s3c_hsotg *hsotg)
@ -3284,7 +3298,7 @@ static void __devinit s3c_hsotg_create_debug(struct s3c_hsotg *hsotg)
/* create one file for each endpoint */
for (epidx = 0; epidx < S3C_HSOTG_EPS; epidx++) {
for (epidx = 0; epidx < hsotg->num_of_eps; epidx++) {
struct s3c_hsotg_ep *ep = &hsotg->eps[epidx];
ep->debugfs = debugfs_create_file(ep->name, 0444,
@ -3306,7 +3320,7 @@ static void __devexit s3c_hsotg_delete_debug(struct s3c_hsotg *hsotg)
{
unsigned epidx;
for (epidx = 0; epidx < S3C_HSOTG_EPS; epidx++) {
for (epidx = 0; epidx < hsotg->num_of_eps; epidx++) {
struct s3c_hsotg_ep *ep = &hsotg->eps[epidx];
debugfs_remove(ep->debugfs);
}
@ -3320,6 +3334,7 @@ static int __devinit s3c_hsotg_probe(struct platform_device *pdev)
{
struct s3c_hsotg_plat *plat = pdev->dev.platform_data;
struct device *dev = &pdev->dev;
struct s3c_hsotg_ep *eps;
struct s3c_hsotg *hsotg;
struct resource *res;
int epnum;
@ -3332,9 +3347,7 @@ static int __devinit s3c_hsotg_probe(struct platform_device *pdev)
return -EINVAL;
}
hsotg = kzalloc(sizeof(struct s3c_hsotg) +
sizeof(struct s3c_hsotg_ep) * S3C_HSOTG_EPS,
GFP_KERNEL);
hsotg = kzalloc(sizeof(struct s3c_hsotg), GFP_KERNEL);
if (!hsotg) {
dev_err(dev, "cannot get memory\n");
return -ENOMEM;
@ -3401,20 +3414,6 @@ static int __devinit s3c_hsotg_probe(struct platform_device *pdev)
hsotg->gadget.dev.parent = dev;
hsotg->gadget.dev.dma_mask = dev->dma_mask;
/* setup endpoint information */
INIT_LIST_HEAD(&hsotg->gadget.ep_list);
hsotg->gadget.ep0 = &hsotg->eps[0].ep;
/* allocate EP0 request */
hsotg->ctrl_req = s3c_hsotg_ep_alloc_request(&hsotg->eps[0].ep,
GFP_KERNEL);
if (!hsotg->ctrl_req) {
dev_err(dev, "failed to allocate ctrl req\n");
goto err_regs;
}
/* reset the system */
clk_enable(hsotg->clk);
@ -3444,14 +3443,45 @@ static int __devinit s3c_hsotg_probe(struct platform_device *pdev)
s3c_hsotg_corereset(hsotg);
s3c_hsotg_init(hsotg);
s3c_hsotg_hw_cfg(hsotg);
/* hsotg->num_of_eps holds number of EPs other than ep0 */
if (hsotg->num_of_eps == 0) {
dev_err(dev, "wrong number of EPs (zero)\n");
goto err_supplies;
}
eps = kcalloc(hsotg->num_of_eps + 1, sizeof(struct s3c_hsotg_ep),
GFP_KERNEL);
if (!eps) {
dev_err(dev, "cannot get memory\n");
goto err_supplies;
}
hsotg->eps = eps;
/* setup endpoint information */
INIT_LIST_HEAD(&hsotg->gadget.ep_list);
hsotg->gadget.ep0 = &hsotg->eps[0].ep;
/* allocate EP0 request */
hsotg->ctrl_req = s3c_hsotg_ep_alloc_request(&hsotg->eps[0].ep,
GFP_KERNEL);
if (!hsotg->ctrl_req) {
dev_err(dev, "failed to allocate ctrl req\n");
goto err_ep_mem;
}
/* initialise the endpoints now the core has been initialised */
for (epnum = 0; epnum < S3C_HSOTG_EPS; epnum++)
for (epnum = 0; epnum < hsotg->num_of_eps; epnum++)
s3c_hsotg_initep(hsotg, &hsotg->eps[epnum], epnum);
ret = usb_add_gadget_udc(&pdev->dev, &hsotg->gadget);
if (ret)
goto err_supplies;
goto err_ep_mem;
s3c_hsotg_create_debug(hsotg);
@ -3460,6 +3490,9 @@ static int __devinit s3c_hsotg_probe(struct platform_device *pdev)
our_hsotg = hsotg;
return 0;
err_ep_mem:
kfree(eps);
err_supplies:
s3c_hsotg_phy_disable(hsotg);