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pxa: convert pxa27x_udc to use read and write functions 

Signed-off-by: Stefan Herbrechtsmeier <sherbrec@cit-ec.uni-bielefeld.de>
CC: Marek Vasut <marek.vasut@gmail.com>
CC: Remy Bohmer  <linux@bohmer.net>
This commit is contained in:
Stefan Herbrechtsmeier 2011-10-17 17:22:48 +02:00 committed by Remy Bohmer
parent 66a181864d
commit bdbcdc897f
2 changed files with 104 additions and 87 deletions
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8
arch/arm/include/asm/arch-pxa/pxa-regs.h
View File

@ -645,7 +645,7 @@ typedef void (*ExcpHndlr) (void) ;
#define UDCOTGICR_IEIDR (1 << 1) /* OTG ID Change Rising Edge Interrupt Enable */
#define UDCOTGICR_IEIDF (1 << 0) /* OTG ID Change Falling Edge Interrupt Enable */
#define UDCCSN(x) __REG2(0x40600100, (x) << 2)
#define UDCCSN(x) (0x40600100 + ((x) << 2))
#define UDCCSR0 0x40600100 /* UDC Control/Status register - Endpoint 0 */
#define UDCCSR0_SA (1 << 7) /* Setup Active */
@ -693,7 +693,7 @@ typedef void (*ExcpHndlr) (void) ;
#define UDCCSR_PC (1 << 1) /* Packet Complete */
#define UDCCSR_FS (1 << 0) /* FIFO needs service */
#define UDCBCN(x) __REG2(0x40600200, (x)<<2)
#define UDCBCN(x) (0x40600200 + ((x) << 2))
#define UDCBCR0 0x40600200 /* Byte Count Register - EP0 */
#define UDCBCRA 0x40600204 /* Byte Count Register - EPA */
#define UDCBCRB 0x40600208 /* Byte Count Register - EPB */
@ -719,7 +719,7 @@ typedef void (*ExcpHndlr) (void) ;
#define UDCBCRW 0x40600258 /* Byte Count Register - EPW */
#define UDCBCRX 0x4060025C /* Byte Count Register - EPX */
#define UDCDN(x) __REG2(0x40600300, (x)<<2)
#define UDCDN(x) (0x40600300 + ((x) << 2))
#define UDCDR0 0x40600300 /* Data Register - EP0 */
#define UDCDRA 0x40600304 /* Data Register - EPA */
#define UDCDRB 0x40600308 /* Data Register - EPB */
@ -745,7 +745,7 @@ typedef void (*ExcpHndlr) (void) ;
#define UDCDRW 0x40600358 /* Data Register - EPW */
#define UDCDRX 0x4060035C /* Data Register - EPX */
#define UDCCN(x) __REG2(0x40600400, (x)<<2)
#define UDCCN(x) (0x40600400 + ((x) << 2))
#define UDCCRA 0x40600404 /* Configuration register EPA */
#define UDCCRB 0x40600408 /* Configuration register EPB */
#define UDCCRC 0x4060040C /* Configuration register EPC */

181
drivers/usb/gadget/pxa27x_udc.c
View File

@ -26,11 +26,13 @@
#include <common.h>
#include <config.h>
#include <asm/byteorder.h>
#include <usbdcore.h>
#include <usbdcore_ep0.h>
#include <usbdevice.h>
#include <asm/arch/hardware.h>
#include <asm/io.h>
#include <usb/pxa27x_udc.h>
#include "ep0.h"
/* number of endpoints on this UDC */
#define UDC_MAX_ENDPOINTS 24
@ -50,7 +52,7 @@ static void udc_dump_buffer(char *name, u8 *buf, int len)
static inline void udc_ack_int_UDCCR(int mask)
{
USIR1 = mask | USIR1;
writel(readl(USIR1) | mask, USIR1);
}
/*
@ -68,9 +70,7 @@ static int udc_write_urb(struct usb_endpoint_instance *endpoint)
{
struct urb *urb = endpoint->tx_urb;
int ep_num = endpoint->endpoint_address & USB_ENDPOINT_NUMBER_MASK;
u32 *addr32 = (u32 *) &UDCDN(ep_num);
u32 *data32 = (u32 *) urb->buffer;
u8 *addr8 = (u8 *) &UDCDN(ep_num);
u8 *data8 = (u8 *) urb->buffer;
unsigned int i, n, w, b, is_short;
int timeout = 2000; /* 2ms */
@ -98,26 +98,28 @@ static int udc_write_urb(struct usb_endpoint_instance *endpoint)
/* Prepare for data send */
if (ep_num)
UDCCSN(ep_num) = UDCCSR_PC;
writel(UDCCSR_PC ,UDCCSN(ep_num));
for (i = 0; i < w; i++)
*addr32 = data32[endpoint->sent/4 + i];
writel(data32[endpoint->sent / 4 + i], UDCDN(ep_num));
for (i = 0; i < b; i++)
*addr8 = data8[endpoint->sent + w*4 + i];
writeb(data8[endpoint->sent + w * 4 + i], UDCDN(ep_num));
/* Set "Packet Complete" if less data then tx_packetSize */
if (is_short)
UDCCSN(ep_num) = ep_num ? UDCCSR_SP : UDCCSR0_IPR;
writel(ep_num ? UDCCSR_SP : UDCCSR0_IPR, UDCCSN(ep_num));
/* Wait for data sent */
while (!(UDCCSN(ep_num) & (ep_num ? UDCCSR_PC : UDCCSR0_IPR))) {
if (ep_num) {
while (!(readl(UDCCSN(ep_num)) & UDCCSR_PC)) {
if (timeout-- == 0)
return -1;
else
udelay(1);
};
}
}
endpoint->last = n;
if (ep_num) {
@ -127,7 +129,7 @@ static int udc_write_urb(struct usb_endpoint_instance *endpoint)
endpoint->last -= n;
}
if ((endpoint->tx_urb->actual_length - endpoint->sent) <= 0) {
if (endpoint->sent >= urb->actual_length) {
urb->actual_length = 0;
endpoint->sent = 0;
endpoint->last = 0;
@ -148,7 +150,6 @@ static int udc_read_urb(struct usb_endpoint_instance *endpoint)
{
struct urb *urb = endpoint->rcv_urb;
int ep_num = endpoint->endpoint_address & USB_ENDPOINT_NUMBER_MASK;
u32 *addr32 = (u32 *) &UDCDN(ep_num);
u32 *data32 = (u32 *) urb->buffer;
unsigned int i, n, is_short ;
@ -160,15 +161,15 @@ static int udc_read_urb(struct usb_endpoint_instance *endpoint)
endpoint->rcv_packetSize);
#endif
if (UDCCSN(ep_num) & UDCCSR_BNE)
n = UDCBCN(ep_num) & 0x3ff;
if (readl(UDCCSN(ep_num)) & UDCCSR_BNE)
n = readl(UDCBCN(ep_num)) & 0x3ff;
else /* zlp */
n = 0;
is_short = n != endpoint->rcv_packetSize;
usbdbg("n %d%s", n, is_short ? "-s" : "");
for (i = 0; i < n; i += 4)
data32[urb->actual_length/4 + i/4] = *addr32;
data32[urb->actual_length / 4 + i / 4] = readl(UDCDN(ep_num));
udc_dump_buffer("urb read", (u8 *) data32, urb->actual_length + n);
usbd_rcv_complete(endpoint, n, 0);
@ -178,27 +179,35 @@ static int udc_read_urb(struct usb_endpoint_instance *endpoint)
static int udc_read_urb_ep0(void)
{
u32 *addr32 = (u32 *) &UDCDN(0);
u32 *data32 = (u32 *) ep0_urb->buffer;
u8 *addr8 = (u8 *) &UDCDN(0);
u8 *data8 = (u8 *) ep0_urb->buffer;
unsigned int i, n, w, b;
n = UDCBCR0;
usbdbg("read urb on ep 0");
#if defined(USBDDBG) && defined(USBDPARANOIA)
usbdbg("urb: buf %p, buf_len %d, actual_len %d",
ep0_urb->buffer, ep0_urb->buffer_length, ep0_urb->actual_length);
#endif
n = readl(UDCBCR0);
w = n / 4;
b = n % 4;
for (i = 0; i < w; i++) {
data32[ep0_urb->actual_length/4 + i] = *addr32;
ep0_urb->actual_length += 4;
data32[ep0_urb->actual_length / 4 + i] = readl(UDCDN(0));
// ep0_urb->actual_length += 4;
}
for (i = 0; i < b; i++) {
data8[ep0_urb->actual_length + w*4 + i] = *addr8;
ep0_urb->actual_length++;
data8[ep0_urb->actual_length + w * 4 + i] = readb(UDCDN(0));
// ep0_urb->actual_length++;
}
UDCCSR0 = UDCCSR0_OPC | UDCCSR0_IPR;
ep0_urb->actual_length += n;
udc_dump_buffer("urb read", (u8 *) data32, ep0_urb->actual_length);
writel(UDCCSR0_OPC | UDCCSR0_IPR, UDCCSR0);
if (ep0_urb->actual_length == ep0_urb->device_request.wLength)
return 1;
@ -207,7 +216,7 @@ static int udc_read_urb_ep0(void)
static void udc_handle_ep0(struct usb_endpoint_instance *endpoint)
{
u32 udccsr0 = UDCCSR0;
u32 udccsr0 = readl(UDCCSR0);
u32 *data = (u32 *) &ep0_urb->device_request;
int i;
@ -216,7 +225,7 @@ static void udc_handle_ep0(struct usb_endpoint_instance *endpoint)
/* Clear stall status */
if (udccsr0 & UDCCSR0_SST) {
usberr("clear stall status");
UDCCSR0 = UDCCSR0_SST;
writel(UDCCSR0_SST, UDCCSR0);
ep0state = EP0_IDLE;
}
@ -227,8 +236,7 @@ static void udc_handle_ep0(struct usb_endpoint_instance *endpoint)
switch (ep0state) {
case EP0_IDLE:
udccsr0 = UDCCSR0;
udccsr0 = readl(UDCCSR0);
/* Start control request? */
if ((udccsr0 & (UDCCSR0_OPC | UDCCSR0_SA | UDCCSR0_RNE))
== (UDCCSR0_OPC | UDCCSR0_SA | UDCCSR0_RNE)) {
@ -238,15 +246,15 @@ static void udc_handle_ep0(struct usb_endpoint_instance *endpoint)
*/
usbdbg("try reading SETUP packet");
for (i = 0; i < 2; i++) {
if ((UDCCSR0 & UDCCSR0_RNE) == 0) {
if ((readl(UDCCSR0) & UDCCSR0_RNE) == 0) {
usberr("setup packet too short:%d", i);
goto stall;
}
data[i] = UDCDR0;
data[i] = readl(UDCDR0);
}
UDCCSR0 |= (UDCCSR0_OPC | UDCCSR0_SA);
if ((UDCCSR0 & UDCCSR0_RNE) != 0) {
writel(readl(UDCCSR0) | UDCCSR0_OPC | UDCCSR0_SA, UDCCSR0);
if ((readl(UDCCSR0) & UDCCSR0_RNE) != 0) {
usberr("setup packet too long");
goto stall;
}
@ -261,7 +269,7 @@ static void udc_handle_ep0(struct usb_endpoint_instance *endpoint)
(u8 *)data, 8);
goto stall;
}
UDCCSR0 = UDCCSR0_IPR;
writel(UDCCSR0_IPR, UDCCSR0);
ep0state = EP0_IDLE;
} else {
/* Check direction */
@ -274,7 +282,7 @@ static void udc_handle_ep0(struct usb_endpoint_instance *endpoint)
ep0_urb->buffer_length =
sizeof(ep0_urb->buffer_data);
ep0_urb->actual_length = 0;
UDCCSR0 = UDCCSR0_IPR;
writel(UDCCSR0_IPR, UDCCSR0);
} else {
/* The ep0_recv_setup function has
* already placed our response packet
@ -289,9 +297,9 @@ stall:
, (u8 *) data, 8);
ep0state = EP0_IDLE;
UDCCSR0 = UDCCSR0_SA |
writel(UDCCSR0_SA |
UDCCSR0_OPC | UDCCSR0_FST |
UDCCS0_FTF;
UDCCS0_FTF, UDCCSR0);
return;
}
@ -317,7 +325,7 @@ stall:
* - IPR cleared
* - OPC got set, without SA (likely status stage)
*/
UDCCSR0 = udccsr0 & (UDCCSR0_SA | UDCCSR0_OPC);
writel(udccsr0 & (UDCCSR0_SA | UDCCSR0_OPC), UDCCSR0);
}
break;
@ -351,7 +359,7 @@ read_complete:
case EP0_IN_DATA:
/* GET_DESCRIPTOR etc */
if (udccsr0 & UDCCSR0_OPC) {
UDCCSR0 = UDCCSR0_OPC | UDCCSR0_FTF;
writel(UDCCSR0_OPC | UDCCSR0_FTF, UDCCSR0);
usberr("ep0in premature status");
ep0state = EP0_IDLE;
} else {
@ -364,14 +372,14 @@ read_complete:
break;
case EP0_XFER_COMPLETE:
UDCCSR0 = UDCCSR0_IPR;
writel(UDCCSR0_IPR, UDCCSR0);
ep0state = EP0_IDLE;
break;
default:
usbdbg("Default\n");
}
USIR0 = USIR0_IR0;
writel(USIR0_IR0, USIR0);
}
static void udc_handle_ep(struct usb_endpoint_instance *endpoint)
@ -380,33 +388,33 @@ static void udc_handle_ep(struct usb_endpoint_instance *endpoint)
int ep_num = ep_addr & USB_ENDPOINT_NUMBER_MASK;
int ep_isout = (ep_addr & USB_ENDPOINT_DIR_MASK) == USB_DIR_OUT;
u32 flags = UDCCSN(ep_num) & (UDCCSR_SST | UDCCSR_TRN);
u32 flags = readl(UDCCSN(ep_num)) & (UDCCSR_SST | UDCCSR_TRN);
if (flags)
UDCCSN(ep_num) = flags;
writel(flags, UDCCSN(ep_num));
if (ep_isout)
udc_read_urb(endpoint);
else
udc_write_urb(endpoint);
UDCCSN(ep_num) = UDCCSR_PC;
writel(UDCCSR_PC, UDCCSN(ep_num));
}
static void udc_state_changed(void)
{
int config, interface, alternate;
UDCCR |= UDCCR_SMAC;
writel(readl(UDCCR) | UDCCR_SMAC, UDCCR);
config = (UDCCR & UDCCR_ACN) >> UDCCR_ACN_S;
interface = (UDCCR & UDCCR_AIN) >> UDCCR_AIN_S;
alternate = (UDCCR & UDCCR_AAISN) >> UDCCR_AAISN_S;
config = (readl(UDCCR) & UDCCR_ACN) >> UDCCR_ACN_S;
interface = (readl(UDCCR) & UDCCR_AIN) >> UDCCR_AIN_S;
alternate = (readl(UDCCR) & UDCCR_AAISN) >> UDCCR_AAISN_S;
usbdbg("New UDC settings are: conf %d - inter %d - alter %d",
config, interface, alternate);
usbd_device_event_irq(udc_device, DEVICE_CONFIGURED, 0);
UDCISR1 = UDCISR1_IRCC;
writel(UDCISR1_IRCC, UDCISR1);
}
void udc_irq(void)
@ -419,7 +427,7 @@ void udc_irq(void)
do {
handled = 0;
/* Suspend Interrupt Request */
if (USIR1 & UDCCR_SUSIR) {
if (readl(USIR1) & UDCCR_SUSIR) {
usbdbg("Suspend\n");
udc_ack_int_UDCCR(UDCCR_SUSIR);
handled = 1;
@ -427,35 +435,35 @@ void udc_irq(void)
}
/* Resume Interrupt Request */
if (USIR1 & UDCCR_RESIR) {
if (readl(USIR1) & UDCCR_RESIR) {
udc_ack_int_UDCCR(UDCCR_RESIR);
handled = 1;
usbdbg("USB resume\n");
}
if (USIR1 & (1<<31)) {
if (readl(USIR1) & (1<<31)) {
handled = 1;
udc_state_changed();
}
/* Reset Interrupt Request */
if (USIR1 & UDCCR_RSTIR) {
if (readl(USIR1) & UDCCR_RSTIR) {
udc_ack_int_UDCCR(UDCCR_RSTIR);
handled = 1;
usbdbg("Reset\n");
usbd_device_event_irq(udc_device, DEVICE_RESET, 0);
} else {
if (USIR0)
usbdbg("UISR0: %x \n", USIR0);
if (readl(USIR0))
usbdbg("UISR0: %x \n", readl(USIR0));
if (USIR0 & 0x2)
USIR0 = 0x2;
if (readl(USIR0) & 0x2)
writel(0x2, USIR0);
/* Control traffic */
if (USIR0 & USIR0_IR0) {
if (readl(USIR0) & USIR0_IR0) {
handled = 1;
writel(USIR0_IR0, USIR0);
udc_handle_ep0(udc_device->bus->endpoint_array);
USIR0 = USIR0_IR0;
}
endpoint = udc_device->bus->endpoint_array;
@ -464,11 +472,11 @@ void udc_irq(void)
USB_ENDPOINT_NUMBER_MASK;
if (!ep_num)
continue;
udcisr0 = UDCISR0;
udcisr0 = readl(UDCISR0);
if (udcisr0 &
UDCISR_INT(ep_num, UDC_INT_PACKETCMP)) {
UDCISR0 = UDCISR_INT(ep_num,
UDC_INT_PACKETCMP);
writel(UDCISR_INT(ep_num, UDC_INT_PACKETCMP),
UDCISR0);
udc_handle_ep(&endpoint[i]);
}
}
@ -485,21 +493,21 @@ void udc_irq(void)
static inline void udc_set_mask_UDCCR(int mask)
{
UDCCR = (UDCCR & UDCCR_MASK_BITS) | (mask & UDCCR_MASK_BITS);
writel((readl(UDCCR) & UDCCR_MASK_BITS) | (mask & UDCCR_MASK_BITS), UDCCR);
}
static inline void udc_clear_mask_UDCCR(int mask)
{
UDCCR = (UDCCR & UDCCR_MASK_BITS) & ~(mask & UDCCR_MASK_BITS);
writel((readl(UDCCR) & UDCCR_MASK_BITS) & ~(mask & UDCCR_MASK_BITS), UDCCR);
}
static void pio_irq_enable(int ep_num)
{
if (ep_num < 16)
UDCICR0 |= 3 << (ep_num * 2);
writel(readl(UDCICR0) | 3 << (ep_num * 2), UDCICR0);
else {
ep_num -= 16;
UDCICR1 |= 3 << (ep_num * 2);
writel(readl(UDCICR1) | 3 << (ep_num * 2), UDCICR1);
}
}
@ -589,22 +597,26 @@ void udc_setup_ep(struct usb_device_instance *device, unsigned int id,
tmp |= (ep_size << UDCCONR_MPS_S) & UDCCONR_MPS;
tmp |= UDCCONR_EE;
UDCCN(ep_num) = tmp;
writel(tmp, UDCCN(ep_num));
usbdbg("UDCCR%c = %x", 'A' + ep_num-1, UDCCN(ep_num));
usbdbg("UDCCSR%c = %x", 'A' + ep_num-1, UDCCSN(ep_num));
//usbdbg
usbdbg("UDCCR%c = %x", 'A' + ep_num-1, readl(UDCCN(ep_num)));
usbdbg("UDCCSR%c = %x", 'A' + ep_num-1, readl(UDCCSN(ep_num)));
}
#define CONFIG_USB_DEV_PULLUP_GPIO 87
/* Connect the USB device to the bus */
void udc_connect(void)
{
usbdbg("UDC connect");
#ifdef CONFIG_USB_DEV_PULLUP_GPIO
/* Turn on the USB connection by enabling the pullup resistor */
set_GPIO_mode(CONFIG_USB_DEV_PULLUP_GPIO | GPIO_OUT);
GPSR(CONFIG_USB_DEV_PULLUP_GPIO) = GPIO_bit(CONFIG_USB_DEV_PULLUP_GPIO);
writel(GPIO_bit(CONFIG_USB_DEV_PULLUP_GPIO), GPSR(CONFIG_USB_DEV_PULLUP_GPIO));
#else
/* Host port 2 transceiver D+ pull up enable */
writel(readl(UP2OCR) | UP2OCR_DPPUE, UP2OCR);
#endif
}
/* Disconnect the USB device to the bus */
@ -612,8 +624,13 @@ void udc_disconnect(void)
{
usbdbg("UDC disconnect");
#ifdef CONFIG_USB_DEV_PULLUP_GPIO
/* Turn off the USB connection by disabling the pullup resistor */
GPCR(CONFIG_USB_DEV_PULLUP_GPIO) = GPIO_bit(CONFIG_USB_DEV_PULLUP_GPIO);
writel(GPIO_bit(CONFIG_USB_DEV_PULLUP_GPIO), GPCR(CONFIG_USB_DEV_PULLUP_GPIO));
#else
/* Host port 2 transceiver D+ pull up disable */
writel(readl(UP2OCR) & ~UP2OCR_DPPUE, UP2OCR);
#endif
}
/* Switch on the UDC */
@ -621,15 +638,14 @@ void udc_enable(struct usb_device_instance *device)
{
ep0state = EP0_IDLE;
CKEN |= CKEN11_USB;
/* enable endpoint 0, A, B's Packet Complete Interrupt. */
UDCICR0 = 0x0000003f;
UDCICR1 = 0xa8000000;
writel(0xffffffff, UDCICR0);
writel(0xa8000000, UDCICR1);
/* clear the interrupt status/control registers */
UDCISR0 = 0xffffffff;
UDCISR1 = 0xffffffff;
writel(0xffffffff, UDCISR0);
writel(0xffffffff, UDCISR1);
/* set UDC-enable */
udc_set_mask_UDCCR(UDCCR_UDE);
@ -652,7 +668,7 @@ void udc_disable(void)
udc_clear_mask_UDCCR(UDCCR_UDE);
/* Disable clock for USB device */
CKEN &= ~CKEN11_USB;
writel(readl(CKEN) & ~CKEN11_USB, CKEN);
/* Free ep0 URB */
if (ep0_urb) {
@ -689,14 +705,15 @@ int udc_init(void)
udc_device = NULL;
usbdbg("PXA27x usbd start");
/* Enable clock for USB device */
writel(readl(CKEN) | CKEN11_USB, CKEN);
/* Disable the UDC */
udc_clear_mask_UDCCR(UDCCR_UDE);
/* Disable clock for USB device */
CKEN &= ~CKEN11_USB;
/* Disable IRQs: we don't use them */
UDCICR0 = UDCICR1 = 0;
writel(0, UDCICR0);
writel(0, UDCICR1);
return 0;
}