Commit 0fee2eac5c2b ("usb: phy: remove phy-isp1301-omap driver") removes
the Philips ISP1301 with OMAP OTG driver and its corresponding config
ISP1301_OMAP. The drivers, OMAP USB Device Controller and OHCI support for
OMAP1/2 chips, with corresponding configs, USB_OMAP and USB_OHCI_HCD_OMAP1,
need this removed driver (see "depends on ISP1301_OMAP") to build.
Remove those two drivers.
With the config USB_OMAP removed in this commit, remove some further code
in the omap-dma header and mach-omap1 architecture code.
Signed-off-by: Lukas Bulwahn <[email protected]>
---
arch/arm/mach-omap1/board-osk.c | 5 -
arch/arm/mach-omap1/omap-dma.c | 455 -----
arch/arm/mach-omap1/usb.c | 67 -
arch/arm/mach-omap1/usb.h | 4 -
drivers/usb/gadget/udc/Kconfig | 15 -
drivers/usb/gadget/udc/Makefile | 1 -
drivers/usb/gadget/udc/omap_udc.c | 3001 -----------------------------
drivers/usb/gadget/udc/omap_udc.h | 207 --
drivers/usb/host/Kconfig | 8 -
drivers/usb/host/Makefile | 1 -
drivers/usb/host/ohci-omap.c | 435 -----
include/linux/omap-dma.h | 28 -
12 files changed, 4227 deletions(-)
delete mode 100644 drivers/usb/gadget/udc/omap_udc.c
delete mode 100644 drivers/usb/gadget/udc/omap_udc.h
delete mode 100644 drivers/usb/host/ohci-omap.c
diff --git a/arch/arm/mach-omap1/board-osk.c b/arch/arm/mach-omap1/board-osk.c
index df758c1f9237..117bb569b861 100644
--- a/arch/arm/mach-omap1/board-osk.c
+++ b/arch/arm/mach-omap1/board-osk.c
@@ -328,14 +328,9 @@ static struct omap_usb_config osk_usb_config __initdata = {
* be used, with a NONSTANDARD gender-bending cable/dongle, as
* a peripheral.
*/
-#if IS_ENABLED(CONFIG_USB_OMAP)
- .register_dev = 1,
- .hmc_mode = 0,
-#else
.register_host = 1,
.hmc_mode = 16,
.rwc = 1,
-#endif
.pins[0] = 2,
};
diff --git a/arch/arm/mach-omap1/omap-dma.c b/arch/arm/mach-omap1/omap-dma.c
index f7e62de427f3..68ed5a5d4fa5 100644
--- a/arch/arm/mach-omap1/omap-dma.c
+++ b/arch/arm/mach-omap1/omap-dma.c
@@ -132,240 +132,6 @@ void omap_set_dma_priority(int lch, int dst_port, int priority)
EXPORT_SYMBOL(omap_set_dma_priority);
#endif
-#if IS_ENABLED(CONFIG_USB_OMAP)
-#ifdef CONFIG_ARCH_OMAP15XX
-/* Returns 1 if the DMA module is in OMAP1510-compatible mode, 0 otherwise */
-static int omap_dma_in_1510_mode(void)
-{
- return enable_1510_mode;
-}
-#else
-#define omap_dma_in_1510_mode() 0
-#endif
-
-void omap_set_dma_transfer_params(int lch, int data_type, int elem_count,
- int frame_count, int sync_mode,
- int dma_trigger, int src_or_dst_synch)
-{
- u32 l;
- u16 ccr;
-
- l = p->dma_read(CSDP, lch);
- l &= ~0x03;
- l |= data_type;
- p->dma_write(l, CSDP, lch);
-
- ccr = p->dma_read(CCR, lch);
- ccr &= ~(1 << 5);
- if (sync_mode == OMAP_DMA_SYNC_FRAME)
- ccr |= 1 << 5;
- p->dma_write(ccr, CCR, lch);
-
- ccr = p->dma_read(CCR2, lch);
- ccr &= ~(1 << 2);
- if (sync_mode == OMAP_DMA_SYNC_BLOCK)
- ccr |= 1 << 2;
- p->dma_write(ccr, CCR2, lch);
- p->dma_write(elem_count, CEN, lch);
- p->dma_write(frame_count, CFN, lch);
-}
-EXPORT_SYMBOL(omap_set_dma_transfer_params);
-
-void omap_set_dma_channel_mode(int lch, enum omap_dma_channel_mode mode)
-{
- if (!dma_omap15xx()) {
- u32 l;
-
- l = p->dma_read(LCH_CTRL, lch);
- l &= ~0x7;
- l |= mode;
- p->dma_write(l, LCH_CTRL, lch);
- }
-}
-EXPORT_SYMBOL(omap_set_dma_channel_mode);
-
-/* Note that src_port is only for omap1 */
-void omap_set_dma_src_params(int lch, int src_port, int src_amode,
- unsigned long src_start,
- int src_ei, int src_fi)
-{
- u32 l;
- u16 w;
-
- w = p->dma_read(CSDP, lch);
- w &= ~(0x1f << 2);
- w |= src_port << 2;
- p->dma_write(w, CSDP, lch);
-
- l = p->dma_read(CCR, lch);
- l &= ~(0x03 << 12);
- l |= src_amode << 12;
- p->dma_write(l, CCR, lch);
-
- p->dma_write(src_start, CSSA, lch);
-
- p->dma_write(src_ei, CSEI, lch);
- p->dma_write(src_fi, CSFI, lch);
-}
-EXPORT_SYMBOL(omap_set_dma_src_params);
-
-void omap_set_dma_src_data_pack(int lch, int enable)
-{
- u32 l;
-
- l = p->dma_read(CSDP, lch);
- l &= ~(1 << 6);
- if (enable)
- l |= (1 << 6);
- p->dma_write(l, CSDP, lch);
-}
-EXPORT_SYMBOL(omap_set_dma_src_data_pack);
-
-void omap_set_dma_src_burst_mode(int lch, enum omap_dma_burst_mode burst_mode)
-{
- unsigned int burst = 0;
- u32 l;
-
- l = p->dma_read(CSDP, lch);
- l &= ~(0x03 << 7);
-
- switch (burst_mode) {
- case OMAP_DMA_DATA_BURST_DIS:
- break;
- case OMAP_DMA_DATA_BURST_4:
- burst = 0x2;
- break;
- case OMAP_DMA_DATA_BURST_8:
- /*
- * not supported by current hardware on OMAP1
- * w |= (0x03 << 7);
- */
- fallthrough;
- case OMAP_DMA_DATA_BURST_16:
- /* OMAP1 don't support burst 16 */
- fallthrough;
- default:
- BUG();
- }
-
- l |= (burst << 7);
- p->dma_write(l, CSDP, lch);
-}
-EXPORT_SYMBOL(omap_set_dma_src_burst_mode);
-
-/* Note that dest_port is only for OMAP1 */
-void omap_set_dma_dest_params(int lch, int dest_port, int dest_amode,
- unsigned long dest_start,
- int dst_ei, int dst_fi)
-{
- u32 l;
-
- l = p->dma_read(CSDP, lch);
- l &= ~(0x1f << 9);
- l |= dest_port << 9;
- p->dma_write(l, CSDP, lch);
-
- l = p->dma_read(CCR, lch);
- l &= ~(0x03 << 14);
- l |= dest_amode << 14;
- p->dma_write(l, CCR, lch);
-
- p->dma_write(dest_start, CDSA, lch);
-
- p->dma_write(dst_ei, CDEI, lch);
- p->dma_write(dst_fi, CDFI, lch);
-}
-EXPORT_SYMBOL(omap_set_dma_dest_params);
-
-void omap_set_dma_dest_data_pack(int lch, int enable)
-{
- u32 l;
-
- l = p->dma_read(CSDP, lch);
- l &= ~(1 << 13);
- if (enable)
- l |= 1 << 13;
- p->dma_write(l, CSDP, lch);
-}
-EXPORT_SYMBOL(omap_set_dma_dest_data_pack);
-
-void omap_set_dma_dest_burst_mode(int lch, enum omap_dma_burst_mode burst_mode)
-{
- unsigned int burst = 0;
- u32 l;
-
- l = p->dma_read(CSDP, lch);
- l &= ~(0x03 << 14);
-
- switch (burst_mode) {
- case OMAP_DMA_DATA_BURST_DIS:
- break;
- case OMAP_DMA_DATA_BURST_4:
- burst = 0x2;
- break;
- case OMAP_DMA_DATA_BURST_8:
- burst = 0x3;
- break;
- case OMAP_DMA_DATA_BURST_16:
- /* OMAP1 don't support burst 16 */
- fallthrough;
- default:
- printk(KERN_ERR "Invalid DMA burst mode\n");
- BUG();
- return;
- }
- l |= (burst << 14);
- p->dma_write(l, CSDP, lch);
-}
-EXPORT_SYMBOL(omap_set_dma_dest_burst_mode);
-
-static inline void omap_enable_channel_irq(int lch)
-{
- /* Clear CSR */
- p->dma_read(CSR, lch);
-
- /* Enable some nice interrupts. */
- p->dma_write(dma_chan[lch].enabled_irqs, CICR, lch);
-}
-
-void omap_disable_dma_irq(int lch, u16 bits)
-{
- dma_chan[lch].enabled_irqs &= ~bits;
-}
-EXPORT_SYMBOL(omap_disable_dma_irq);
-
-static inline void enable_lnk(int lch)
-{
- u32 l;
-
- l = p->dma_read(CLNK_CTRL, lch);
-
- l &= ~(1 << 14);
-
- /* Set the ENABLE_LNK bits */
- if (dma_chan[lch].next_lch != -1)
- l = dma_chan[lch].next_lch | (1 << 15);
-
- p->dma_write(l, CLNK_CTRL, lch);
-}
-
-static inline void disable_lnk(int lch)
-{
- u32 l;
-
- l = p->dma_read(CLNK_CTRL, lch);
-
- /* Disable interrupts */
- omap_disable_channel_irq(lch);
-
- /* Set the STOP_LNK bit */
- l |= 1 << 14;
-
- p->dma_write(l, CLNK_CTRL, lch);
- dma_chan[lch].flags &= ~OMAP_DMA_ACTIVE;
-}
-#endif
-
int omap_request_dma(int dev_id, const char *dev_name,
void (*callback)(int lch, u16 ch_status, void *data),
void *data, int *dma_ch_out)
@@ -463,227 +229,6 @@ static void omap_clear_dma(int lch)
local_irq_restore(flags);
}
-#if IS_ENABLED(CONFIG_USB_OMAP)
-void omap_start_dma(int lch)
-{
- u32 l;
-
- /*
- * The CPC/CDAC register needs to be initialized to zero
- * before starting dma transfer.
- */
- if (dma_omap15xx())
- p->dma_write(0, CPC, lch);
- else
- p->dma_write(0, CDAC, lch);
-
- if (!omap_dma_in_1510_mode() && dma_chan[lch].next_lch != -1) {
- int next_lch, cur_lch;
- char dma_chan_link_map[MAX_LOGICAL_DMA_CH_COUNT];
-
- /* Set the link register of the first channel */
- enable_lnk(lch);
-
- memset(dma_chan_link_map, 0, sizeof(dma_chan_link_map));
- dma_chan_link_map[lch] = 1;
-
- cur_lch = dma_chan[lch].next_lch;
- do {
- next_lch = dma_chan[cur_lch].next_lch;
-
- /* The loop case: we've been here already */
- if (dma_chan_link_map[cur_lch])
- break;
- /* Mark the current channel */
- dma_chan_link_map[cur_lch] = 1;
-
- enable_lnk(cur_lch);
- omap_enable_channel_irq(cur_lch);
-
- cur_lch = next_lch;
- } while (next_lch != -1);
- } else if (IS_DMA_ERRATA(DMA_ERRATA_PARALLEL_CHANNELS))
- p->dma_write(lch, CLNK_CTRL, lch);
-
- omap_enable_channel_irq(lch);
-
- l = p->dma_read(CCR, lch);
-
- if (IS_DMA_ERRATA(DMA_ERRATA_IFRAME_BUFFERING))
- l |= OMAP_DMA_CCR_BUFFERING_DISABLE;
- l |= OMAP_DMA_CCR_EN;
-
- /*
- * As dma_write() uses IO accessors which are weakly ordered, there
- * is no guarantee that data in coherent DMA memory will be visible
- * to the DMA device. Add a memory barrier here to ensure that any
- * such data is visible prior to enabling DMA.
- */
- mb();
- p->dma_write(l, CCR, lch);
-
- dma_chan[lch].flags |= OMAP_DMA_ACTIVE;
-}
-EXPORT_SYMBOL(omap_start_dma);
-
-void omap_stop_dma(int lch)
-{
- u32 l;
-
- /* Disable all interrupts on the channel */
- omap_disable_channel_irq(lch);
-
- l = p->dma_read(CCR, lch);
- if (IS_DMA_ERRATA(DMA_ERRATA_i541) &&
- (l & OMAP_DMA_CCR_SEL_SRC_DST_SYNC)) {
- int i = 0;
- u32 sys_cf;
-
- /* Configure No-Standby */
- l = p->dma_read(OCP_SYSCONFIG, lch);
- sys_cf = l;
- l &= ~DMA_SYSCONFIG_MIDLEMODE_MASK;
- l |= DMA_SYSCONFIG_MIDLEMODE(DMA_IDLEMODE_NO_IDLE);
- p->dma_write(l , OCP_SYSCONFIG, 0);
-
- l = p->dma_read(CCR, lch);
- l &= ~OMAP_DMA_CCR_EN;
- p->dma_write(l, CCR, lch);
-
- /* Wait for sDMA FIFO drain */
- l = p->dma_read(CCR, lch);
- while (i < 100 && (l & (OMAP_DMA_CCR_RD_ACTIVE |
- OMAP_DMA_CCR_WR_ACTIVE))) {
- udelay(5);
- i++;
- l = p->dma_read(CCR, lch);
- }
- if (i >= 100)
- pr_err("DMA drain did not complete on lch %d\n", lch);
- /* Restore OCP_SYSCONFIG */
- p->dma_write(sys_cf, OCP_SYSCONFIG, lch);
- } else {
- l &= ~OMAP_DMA_CCR_EN;
- p->dma_write(l, CCR, lch);
- }
-
- /*
- * Ensure that data transferred by DMA is visible to any access
- * after DMA has been disabled. This is important for coherent
- * DMA regions.
- */
- mb();
-
- if (!omap_dma_in_1510_mode() && dma_chan[lch].next_lch != -1) {
- int next_lch, cur_lch = lch;
- char dma_chan_link_map[MAX_LOGICAL_DMA_CH_COUNT];
-
- memset(dma_chan_link_map, 0, sizeof(dma_chan_link_map));
- do {
- /* The loop case: we've been here already */
- if (dma_chan_link_map[cur_lch])
- break;
- /* Mark the current channel */
- dma_chan_link_map[cur_lch] = 1;
-
- disable_lnk(cur_lch);
-
- next_lch = dma_chan[cur_lch].next_lch;
- cur_lch = next_lch;
- } while (next_lch != -1);
- }
-
- dma_chan[lch].flags &= ~OMAP_DMA_ACTIVE;
-}
-EXPORT_SYMBOL(omap_stop_dma);
-
-/*
- * Allows changing the DMA callback function or data. This may be needed if
- * the driver shares a single DMA channel for multiple dma triggers.
- */
-/*
- * Returns current physical source address for the given DMA channel.
- * If the channel is running the caller must disable interrupts prior calling
- * this function and process the returned value before re-enabling interrupt to
- * prevent races with the interrupt handler. Note that in continuous mode there
- * is a chance for CSSA_L register overflow between the two reads resulting
- * in incorrect return value.
- */
-dma_addr_t omap_get_dma_src_pos(int lch)
-{
- dma_addr_t offset = 0;
-
- if (dma_omap15xx())
- offset = p->dma_read(CPC, lch);
- else
- offset = p->dma_read(CSAC, lch);
-
- if (IS_DMA_ERRATA(DMA_ERRATA_3_3) && offset == 0)
- offset = p->dma_read(CSAC, lch);
-
- if (!dma_omap15xx()) {
- /*
- * CDAC == 0 indicates that the DMA transfer on the channel has
- * not been started (no data has been transferred so far).
- * Return the programmed source start address in this case.
- */
- if (likely(p->dma_read(CDAC, lch)))
- offset = p->dma_read(CSAC, lch);
- else
- offset = p->dma_read(CSSA, lch);
- }
-
- offset |= (p->dma_read(CSSA, lch) & 0xFFFF0000);
-
- return offset;
-}
-EXPORT_SYMBOL(omap_get_dma_src_pos);
-
-/*
- * Returns current physical destination address for the given DMA channel.
- * If the channel is running the caller must disable interrupts prior calling
- * this function and process the returned value before re-enabling interrupt to
- * prevent races with the interrupt handler. Note that in continuous mode there
- * is a chance for CDSA_L register overflow between the two reads resulting
- * in incorrect return value.
- */
-dma_addr_t omap_get_dma_dst_pos(int lch)
-{
- dma_addr_t offset = 0;
-
- if (dma_omap15xx())
- offset = p->dma_read(CPC, lch);
- else
- offset = p->dma_read(CDAC, lch);
-
- /*
- * omap 3.2/3.3 erratum: sometimes 0 is returned if CSAC/CDAC is
- * read before the DMA controller finished disabling the channel.
- */
- if (!dma_omap15xx() && offset == 0) {
- offset = p->dma_read(CDAC, lch);
- /*
- * CDAC == 0 indicates that the DMA transfer on the channel has
- * not been started (no data has been transferred so far).
- * Return the programmed destination start address in this case.
- */
- if (unlikely(!offset))
- offset = p->dma_read(CDSA, lch);
- }
-
- offset |= (p->dma_read(CDSA, lch) & 0xFFFF0000);
-
- return offset;
-}
-EXPORT_SYMBOL(omap_get_dma_dst_pos);
-
-int omap_get_dma_active_status(int lch)
-{
- return (p->dma_read(CCR, lch) & OMAP_DMA_CCR_EN) != 0;
-}
-EXPORT_SYMBOL(omap_get_dma_active_status);
-#endif
-
int omap_dma_running(void)
{
int lch;
diff --git a/arch/arm/mach-omap1/usb.c b/arch/arm/mach-omap1/usb.c
index 08d42abc4a0f..9fb16a2c2a3d 100644
--- a/arch/arm/mach-omap1/usb.c
+++ b/arch/arm/mach-omap1/usb.c
@@ -109,19 +109,6 @@ omap_otg_init(struct omap_usb_config *config)
syscon = omap_readl(OTG_SYSCON_1);
syscon |= HST_IDLE_EN|DEV_IDLE_EN|OTG_IDLE_EN;
-#if IS_ENABLED(CONFIG_USB_OMAP)
- if (config->otg || config->register_dev) {
- struct platform_device *udc_device = config->udc_device;
- int status;
-
- syscon &= ~DEV_IDLE_EN;
- udc_device->dev.platform_data = config;
- status = platform_device_register(udc_device);
- if (status)
- pr_debug("can't register UDC device, %d\n", status);
- }
-#endif
-
#if IS_ENABLED(CONFIG_USB_OHCI_HCD)
if (config->otg || config->register_host) {
struct platform_device *ohci_device = config->ohci_device;
@@ -155,52 +142,10 @@ omap_otg_init(struct omap_usb_config *config)
static void omap_otg_init(struct omap_usb_config *config) {}
#endif
-#if IS_ENABLED(CONFIG_USB_OMAP)
-
-static struct resource udc_resources[] = {
- /* order is significant! */
- { /* registers */
- .start = UDC_BASE,
- .end = UDC_BASE + 0xff,
- .flags = IORESOURCE_MEM,
- }, { /* general IRQ */
- .start = INT_USB_IRQ_GEN,
- .flags = IORESOURCE_IRQ,
- }, { /* PIO IRQ */
- .start = INT_USB_IRQ_NISO,
- .flags = IORESOURCE_IRQ,
- }, { /* SOF IRQ */
- .start = INT_USB_IRQ_ISO,
- .flags = IORESOURCE_IRQ,
- },
-};
-
-static u64 udc_dmamask = ~(u32)0;
-
-static struct platform_device udc_device = {
- .name = "omap_udc",
- .id = -1,
- .dev = {
- .dma_mask = &udc_dmamask,
- .coherent_dma_mask = 0xffffffff,
- },
- .num_resources = ARRAY_SIZE(udc_resources),
- .resource = udc_resources,
-};
-
-static inline void udc_device_init(struct omap_usb_config *pdata)
-{
- pdata->udc_device = &udc_device;
-}
-
-#else
-
static inline void udc_device_init(struct omap_usb_config *pdata)
{
}
-#endif
-
/* The dmamask must be set for OHCI to work */
static u64 ohci_dmamask = ~(u32)0;
@@ -632,18 +577,6 @@ static void __init omap_1510_usb_init(struct omap_usb_config *config)
while (!(omap_readw(ULPD_DPLL_CTRL) & DPLL_LOCK))
cpu_relax();
-#if IS_ENABLED(CONFIG_USB_OMAP)
- if (config->register_dev) {
- int status;
-
- udc_device.dev.platform_data = config;
- status = platform_device_register(&udc_device);
- if (status)
- pr_debug("can't register UDC device, %d\n", status);
- /* udc driver gates 48MHz by D+ pullup */
- }
-#endif
-
if (IS_ENABLED(CONFIG_USB_OHCI_HCD) && config->register_host) {
int status;
diff --git a/arch/arm/mach-omap1/usb.h b/arch/arm/mach-omap1/usb.h
index 08c9344c46e3..6392b4334bde 100644
--- a/arch/arm/mach-omap1/usb.h
+++ b/arch/arm/mach-omap1/usb.h
@@ -6,11 +6,7 @@
#include <linux/platform_data/usb-omap1.h>
#include <linux/soc/ti/omap1-usb.h>
-#if IS_ENABLED(CONFIG_USB_OMAP)
-#define is_usb0_device(config) 1
-#else
#define is_usb0_device(config) 0
-#endif
#if IS_ENABLED(CONFIG_USB_SUPPORT)
void omap1_usb_init(struct omap_usb_config *pdata);
diff --git a/drivers/usb/gadget/udc/Kconfig b/drivers/usb/gadget/udc/Kconfig
index a84da334ed25..38ce90ac82d2 100644
--- a/drivers/usb/gadget/udc/Kconfig
+++ b/drivers/usb/gadget/udc/Kconfig
@@ -115,21 +115,6 @@ config USB_GR_UDC
Select this to support Aeroflex Gaisler GRUSBDC cores from the GRLIB
VHDL IP core library.
-config USB_OMAP
- tristate "OMAP USB Device Controller"
- depends on ARCH_OMAP1
- depends on ISP1301_OMAP
- help
- Many Texas Instruments OMAP processors have flexible full
- speed USB device controllers, with support for up to 30
- endpoints (plus endpoint zero). This driver supports the
- controller in the OMAP 1611, and should work with controllers
- in other OMAP processors too, given minor tweaks.
-
- Say "y" to link the driver statically, or "m" to build a
- dynamically linked module called "omap_udc" and force all
- gadget drivers to also be dynamically linked.
-
config USB_PXA25X
tristate "PXA 25x or IXP 4xx"
depends on (ARCH_PXA && PXA25x) || ARCH_IXP4XX
diff --git a/drivers/usb/gadget/udc/Makefile b/drivers/usb/gadget/udc/Makefile
index 239ea22bdfd9..d0e37dbcd841 100644
--- a/drivers/usb/gadget/udc/Makefile
+++ b/drivers/usb/gadget/udc/Makefile
@@ -16,7 +16,6 @@ obj-$(CONFIG_USB_AMD5536UDC) += amd5536udc_pci.o
obj-$(CONFIG_USB_PXA25X) += pxa25x_udc.o
obj-$(CONFIG_USB_PXA27X) += pxa27x_udc.o
obj-$(CONFIG_USB_GOKU) += goku_udc.o
-obj-$(CONFIG_USB_OMAP) += omap_udc.o
obj-$(CONFIG_USB_AT91) += at91_udc.o
obj-$(CONFIG_USB_ATMEL_USBA) += atmel_usba_udc.o
obj-$(CONFIG_USB_BCM63XX_UDC) += bcm63xx_udc.o
diff --git a/drivers/usb/gadget/udc/omap_udc.c b/drivers/usb/gadget/udc/omap_udc.c
deleted file mode 100644
index 1be8c19f2a04..000000000000
--- a/drivers/usb/gadget/udc/omap_udc.c
+++ /dev/null
@@ -1,3001 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0+
-/*
- * omap_udc.c -- for OMAP full speed udc; most chips support OTG.
- *
- * Copyright (C) 2004 Texas Instruments, Inc.
- * Copyright (C) 2004-2005 David Brownell
- *
- * OMAP2 & DMA support by Kyungmin Park <[email protected]>
- */
-
-#undef DEBUG
-#undef VERBOSE
-
-#include <linux/module.h>
-#include <linux/kernel.h>
-#include <linux/ioport.h>
-#include <linux/types.h>
-#include <linux/errno.h>
-#include <linux/delay.h>
-#include <linux/slab.h>
-#include <linux/timer.h>
-#include <linux/list.h>
-#include <linux/interrupt.h>
-#include <linux/proc_fs.h>
-#include <linux/mm.h>
-#include <linux/moduleparam.h>
-#include <linux/platform_device.h>
-#include <linux/usb/ch9.h>
-#include <linux/usb/gadget.h>
-#include <linux/usb/otg.h>
-#include <linux/dma-mapping.h>
-#include <linux/clk.h>
-#include <linux/err.h>
-#include <linux/prefetch.h>
-#include <linux/io.h>
-
-#include <asm/byteorder.h>
-#include <asm/irq.h>
-#include <asm/unaligned.h>
-#include <asm/mach-types.h>
-
-#include <linux/omap-dma.h>
-#include <linux/platform_data/usb-omap1.h>
-
-#include <linux/soc/ti/omap1-usb.h>
-#include <linux/soc/ti/omap1-soc.h>
-#include <linux/soc/ti/omap1-io.h>
-
-#include "omap_udc.h"
-
-#undef USB_TRACE
-
-/* bulk DMA seems to be behaving for both IN and OUT */
-#define USE_DMA
-
-/* ISO too */
-#define USE_ISO
-
-#define DRIVER_DESC "OMAP UDC driver"
-#define DRIVER_VERSION "4 October 2004"
-
-#define OMAP_DMA_USB_W2FC_TX0 29
-#define OMAP_DMA_USB_W2FC_RX0 26
-
-/*
- * The OMAP UDC needs _very_ early endpoint setup: before enabling the
- * D+ pullup to allow enumeration. That's too early for the gadget
- * framework to use from usb_endpoint_enable(), which happens after
- * enumeration as part of activating an interface. (But if we add an
- * optional new "UDC not yet running" state to the gadget driver model,
- * even just during driver binding, the endpoint autoconfig logic is the
- * natural spot to manufacture new endpoints.)
- *
- * So instead of using endpoint enable calls to control the hardware setup,
- * this driver defines a "fifo mode" parameter. It's used during driver
- * initialization to choose among a set of pre-defined endpoint configs.
- * See omap_udc_setup() for available modes, or to add others. That code
- * lives in an init section, so use this driver as a module if you need
- * to change the fifo mode after the kernel boots.
- *
- * Gadget drivers normally ignore endpoints they don't care about, and
- * won't include them in configuration descriptors. That means only
- * misbehaving hosts would even notice they exist.
- */
-#ifdef USE_ISO
-static unsigned fifo_mode = 3;
-#else
-static unsigned fifo_mode;
-#endif
-
-/* "modprobe omap_udc fifo_mode=42", or else as a kernel
- * boot parameter "omap_udc:fifo_mode=42"
- */
-module_param(fifo_mode, uint, 0);
-MODULE_PARM_DESC(fifo_mode, "endpoint configuration");
-
-#ifdef USE_DMA
-static bool use_dma = 1;
-
-/* "modprobe omap_udc use_dma=y", or else as a kernel
- * boot parameter "omap_udc:use_dma=y"
- */
-module_param(use_dma, bool, 0);
-MODULE_PARM_DESC(use_dma, "enable/disable DMA");
-#else /* !USE_DMA */
-
-/* save a bit of code */
-#define use_dma 0
-#endif /* !USE_DMA */
-
-
-static const char driver_name[] = "omap_udc";
-static const char driver_desc[] = DRIVER_DESC;
-
-/*-------------------------------------------------------------------------*/
-
-/* there's a notion of "current endpoint" for modifying endpoint
- * state, and PIO access to its FIFO.
- */
-
-static void use_ep(struct omap_ep *ep, u16 select)
-{
- u16 num = ep->bEndpointAddress & 0x0f;
-
- if (ep->bEndpointAddress & USB_DIR_IN)
- num |= UDC_EP_DIR;
- omap_writew(num | select, UDC_EP_NUM);
- /* when select, MUST deselect later !! */
-}
-
-static inline void deselect_ep(void)
-{
- u16 w;
-
- w = omap_readw(UDC_EP_NUM);
- w &= ~UDC_EP_SEL;
- omap_writew(w, UDC_EP_NUM);
- /* 6 wait states before TX will happen */
-}
-
-static void dma_channel_claim(struct omap_ep *ep, unsigned preferred);
-
-/*-------------------------------------------------------------------------*/
-
-static int omap_ep_enable(struct usb_ep *_ep,
- const struct usb_endpoint_descriptor *desc)
-{
- struct omap_ep *ep = container_of(_ep, struct omap_ep, ep);
- struct omap_udc *udc;
- unsigned long flags;
- u16 maxp;
-
- /* catch various bogus parameters */
- if (!_ep || !desc
- || desc->bDescriptorType != USB_DT_ENDPOINT
- || ep->bEndpointAddress != desc->bEndpointAddress
- || ep->maxpacket < usb_endpoint_maxp(desc)) {
- DBG("%s, bad ep or descriptor\n", __func__);
- return -EINVAL;
- }
- maxp = usb_endpoint_maxp(desc);
- if ((desc->bmAttributes == USB_ENDPOINT_XFER_BULK
- && maxp != ep->maxpacket)
- || usb_endpoint_maxp(desc) > ep->maxpacket
- || !desc->wMaxPacketSize) {
- DBG("%s, bad %s maxpacket\n", __func__, _ep->name);
- return -ERANGE;
- }
-
-#ifdef USE_ISO
- if ((desc->bmAttributes == USB_ENDPOINT_XFER_ISOC
- && desc->bInterval != 1)) {
- /* hardware wants period = 1; USB allows 2^(Interval-1) */
- DBG("%s, unsupported ISO period %dms\n", _ep->name,
- 1 << (desc->bInterval - 1));
- return -EDOM;
- }
-#else
- if (desc->bmAttributes == USB_ENDPOINT_XFER_ISOC) {
- DBG("%s, ISO nyet\n", _ep->name);
- return -EDOM;
- }
-#endif
-
- /* xfer types must match, except that interrupt ~= bulk */
- if (ep->bmAttributes != desc->bmAttributes
- && ep->bmAttributes != USB_ENDPOINT_XFER_BULK
- && desc->bmAttributes != USB_ENDPOINT_XFER_INT) {
- DBG("%s, %s type mismatch\n", __func__, _ep->name);
- return -EINVAL;
- }
-
- udc = ep->udc;
- if (!udc->driver || udc->gadget.speed == USB_SPEED_UNKNOWN) {
- DBG("%s, bogus device state\n", __func__);
- return -ESHUTDOWN;
- }
-
- spin_lock_irqsave(&udc->lock, flags);
-
- ep->ep.desc = desc;
- ep->irqs = 0;
- ep->stopped = 0;
- ep->ep.maxpacket = maxp;
-
- /* set endpoint to initial state */
- ep->dma_channel = 0;
- ep->has_dma = 0;
- ep->lch = -1;
- use_ep(ep, UDC_EP_SEL);
- omap_writew(udc->clr_halt, UDC_CTRL);
- ep->ackwait = 0;
- deselect_ep();
-
- if (ep->bmAttributes == USB_ENDPOINT_XFER_ISOC)
- list_add(&ep->iso, &udc->iso);
-
- /* maybe assign a DMA channel to this endpoint */
- if (use_dma && desc->bmAttributes == USB_ENDPOINT_XFER_BULK)
- /* FIXME ISO can dma, but prefers first channel */
- dma_channel_claim(ep, 0);
-
- /* PIO OUT may RX packets */
- if (desc->bmAttributes != USB_ENDPOINT_XFER_ISOC
- && !ep->has_dma
- && !(ep->bEndpointAddress & USB_DIR_IN)) {
- omap_writew(UDC_SET_FIFO_EN, UDC_CTRL);
- ep->ackwait = 1 + ep->double_buf;
- }
-
- spin_unlock_irqrestore(&udc->lock, flags);
- VDBG("%s enabled\n", _ep->name);
- return 0;
-}
-
-static void nuke(struct omap_ep *, int status);
-
-static int omap_ep_disable(struct usb_ep *_ep)
-{
- struct omap_ep *ep = container_of(_ep, struct omap_ep, ep);
- unsigned long flags;
-
- if (!_ep || !ep->ep.desc) {
- DBG("%s, %s not enabled\n", __func__,
- _ep ? ep->ep.name : NULL);
- return -EINVAL;
- }
-
- spin_lock_irqsave(&ep->udc->lock, flags);
- ep->ep.desc = NULL;
- nuke(ep, -ESHUTDOWN);
- ep->ep.maxpacket = ep->maxpacket;
- ep->has_dma = 0;
- omap_writew(UDC_SET_HALT, UDC_CTRL);
- list_del_init(&ep->iso);
- del_timer(&ep->timer);
-
- spin_unlock_irqrestore(&ep->udc->lock, flags);
-
- VDBG("%s disabled\n", _ep->name);
- return 0;
-}
-
-/*-------------------------------------------------------------------------*/
-
-static struct usb_request *
-omap_alloc_request(struct usb_ep *ep, gfp_t gfp_flags)
-{
- struct omap_req *req;
-
- req = kzalloc(sizeof(*req), gfp_flags);
- if (!req)
- return NULL;
-
- INIT_LIST_HEAD(&req->queue);
-
- return &req->req;
-}
-
-static void
-omap_free_request(struct usb_ep *ep, struct usb_request *_req)
-{
- struct omap_req *req = container_of(_req, struct omap_req, req);
-
- kfree(req);
-}
-
-/*-------------------------------------------------------------------------*/
-
-static void
-done(struct omap_ep *ep, struct omap_req *req, int status)
-{
- struct omap_udc *udc = ep->udc;
- unsigned stopped = ep->stopped;
-
- list_del_init(&req->queue);
-
- if (req->req.status == -EINPROGRESS)
- req->req.status = status;
- else
- status = req->req.status;
-
- if (use_dma && ep->has_dma)
- usb_gadget_unmap_request(&udc->gadget, &req->req,
- (ep->bEndpointAddress & USB_DIR_IN));
-
-#ifndef USB_TRACE
- if (status && status != -ESHUTDOWN)
-#endif
- VDBG("complete %s req %p stat %d len %u/%u\n",
- ep->ep.name, &req->req, status,
- req->req.actual, req->req.length);
-
- /* don't modify queue heads during completion callback */
- ep->stopped = 1;
- spin_unlock(&ep->udc->lock);
- usb_gadget_giveback_request(&ep->ep, &req->req);
- spin_lock(&ep->udc->lock);
- ep->stopped = stopped;
-}
-
-/*-------------------------------------------------------------------------*/
-
-#define UDC_FIFO_FULL (UDC_NON_ISO_FIFO_FULL | UDC_ISO_FIFO_FULL)
-#define UDC_FIFO_UNWRITABLE (UDC_EP_HALTED | UDC_FIFO_FULL)
-
-#define FIFO_EMPTY (UDC_NON_ISO_FIFO_EMPTY | UDC_ISO_FIFO_EMPTY)
-#define FIFO_UNREADABLE (UDC_EP_HALTED | FIFO_EMPTY)
-
-static inline int
-write_packet(u8 *buf, struct omap_req *req, unsigned max)
-{
- unsigned len;
- u16 *wp;
-
- len = min(req->req.length - req->req.actual, max);
- req->req.actual += len;
-
- max = len;
- if (likely((((int)buf) & 1) == 0)) {
- wp = (u16 *)buf;
- while (max >= 2) {
- omap_writew(*wp++, UDC_DATA);
- max -= 2;
- }
- buf = (u8 *)wp;
- }
- while (max--)
- omap_writeb(*buf++, UDC_DATA);
- return len;
-}
-
-/* FIXME change r/w fifo calling convention */
-
-
-/* return: 0 = still running, 1 = completed, negative = errno */
-static int write_fifo(struct omap_ep *ep, struct omap_req *req)
-{
- u8 *buf;
- unsigned count;
- int is_last;
- u16 ep_stat;
-
- buf = req->req.buf + req->req.actual;
- prefetch(buf);
-
- /* PIO-IN isn't double buffered except for iso */
- ep_stat = omap_readw(UDC_STAT_FLG);
- if (ep_stat & UDC_FIFO_UNWRITABLE)
- return 0;
-
- count = ep->ep.maxpacket;
- count = write_packet(buf, req, count);
- omap_writew(UDC_SET_FIFO_EN, UDC_CTRL);
- ep->ackwait = 1;
-
- /* last packet is often short (sometimes a zlp) */
- if (count != ep->ep.maxpacket)
- is_last = 1;
- else if (req->req.length == req->req.actual
- && !req->req.zero)
- is_last = 1;
- else
- is_last = 0;
-
- /* NOTE: requests complete when all IN data is in a
- * FIFO (or sometimes later, if a zlp was needed).
- * Use usb_ep_fifo_status() where needed.
- */
- if (is_last)
- done(ep, req, 0);
- return is_last;
-}
-
-static inline int
-read_packet(u8 *buf, struct omap_req *req, unsigned avail)
-{
- unsigned len;
- u16 *wp;
-
- len = min(req->req.length - req->req.actual, avail);
- req->req.actual += len;
- avail = len;
-
- if (likely((((int)buf) & 1) == 0)) {
- wp = (u16 *)buf;
- while (avail >= 2) {
- *wp++ = omap_readw(UDC_DATA);
- avail -= 2;
- }
- buf = (u8 *)wp;
- }
- while (avail--)
- *buf++ = omap_readb(UDC_DATA);
- return len;
-}
-
-/* return: 0 = still running, 1 = queue empty, negative = errno */
-static int read_fifo(struct omap_ep *ep, struct omap_req *req)
-{
- u8 *buf;
- unsigned count, avail;
- int is_last;
-
- buf = req->req.buf + req->req.actual;
- prefetchw(buf);
-
- for (;;) {
- u16 ep_stat = omap_readw(UDC_STAT_FLG);
-
- is_last = 0;
- if (ep_stat & FIFO_EMPTY) {
- if (!ep->double_buf)
- break;
- ep->fnf = 1;
- }
- if (ep_stat & UDC_EP_HALTED)
- break;
-
- if (ep_stat & UDC_FIFO_FULL)
- avail = ep->ep.maxpacket;
- else {
- avail = omap_readw(UDC_RXFSTAT);
- ep->fnf = ep->double_buf;
- }
- count = read_packet(buf, req, avail);
-
- /* partial packet reads may not be errors */
- if (count < ep->ep.maxpacket) {
- is_last = 1;
- /* overflowed this request? flush extra data */
- if (count != avail) {
- req->req.status = -EOVERFLOW;
- avail -= count;
- while (avail--)
- omap_readw(UDC_DATA);
- }
- } else if (req->req.length == req->req.actual)
- is_last = 1;
- else
- is_last = 0;
-
- if (!ep->bEndpointAddress)
- break;
- if (is_last)
- done(ep, req, 0);
- break;
- }
- return is_last;
-}
-
-/*-------------------------------------------------------------------------*/
-
-static u16 dma_src_len(struct omap_ep *ep, dma_addr_t start)
-{
- dma_addr_t end;
-
- /* IN-DMA needs this on fault/cancel paths, so 15xx misreports
- * the last transfer's bytecount by more than a FIFO's worth.
- */
- if (cpu_is_omap15xx())
- return 0;
-
- end = omap_get_dma_src_pos(ep->lch);
- if (end == ep->dma_counter)
- return 0;
-
- end |= start & (0xffff << 16);
- if (end < start)
- end += 0x10000;
- return end - start;
-}
-
-static u16 dma_dest_len(struct omap_ep *ep, dma_addr_t start)
-{
- dma_addr_t end;
-
- end = omap_get_dma_dst_pos(ep->lch);
- if (end == ep->dma_counter)
- return 0;
-
- end |= start & (0xffff << 16);
- if (cpu_is_omap15xx())
- end++;
- if (end < start)
- end += 0x10000;
- return end - start;
-}
-
-
-/* Each USB transfer request using DMA maps to one or more DMA transfers.
- * When DMA completion isn't request completion, the UDC continues with
- * the next DMA transfer for that USB transfer.
- */
-
-static void next_in_dma(struct omap_ep *ep, struct omap_req *req)
-{
- u16 txdma_ctrl, w;
- unsigned length = req->req.length - req->req.actual;
- const int sync_mode = cpu_is_omap15xx()
- ? OMAP_DMA_SYNC_FRAME
- : OMAP_DMA_SYNC_ELEMENT;
- int dma_trigger = 0;
-
- /* measure length in either bytes or packets */
- if ((cpu_is_omap16xx() && length <= UDC_TXN_TSC)
- || (cpu_is_omap15xx() && length < ep->maxpacket)) {
- txdma_ctrl = UDC_TXN_EOT | length;
- omap_set_dma_transfer_params(ep->lch, OMAP_DMA_DATA_TYPE_S8,
- length, 1, sync_mode, dma_trigger, 0);
- } else {
- length = min(length / ep->maxpacket,
- (unsigned) UDC_TXN_TSC + 1);
- txdma_ctrl = length;
- omap_set_dma_transfer_params(ep->lch, OMAP_DMA_DATA_TYPE_S16,
- ep->ep.maxpacket >> 1, length, sync_mode,
- dma_trigger, 0);
- length *= ep->maxpacket;
- }
- omap_set_dma_src_params(ep->lch, OMAP_DMA_PORT_EMIFF,
- OMAP_DMA_AMODE_POST_INC, req->req.dma + req->req.actual,
- 0, 0);
-
- omap_start_dma(ep->lch);
- ep->dma_counter = omap_get_dma_src_pos(ep->lch);
- w = omap_readw(UDC_DMA_IRQ_EN);
- w |= UDC_TX_DONE_IE(ep->dma_channel);
- omap_writew(w, UDC_DMA_IRQ_EN);
- omap_writew(UDC_TXN_START | txdma_ctrl, UDC_TXDMA(ep->dma_channel));
- req->dma_bytes = length;
-}
-
-static void finish_in_dma(struct omap_ep *ep, struct omap_req *req, int status)
-{
- u16 w;
-
- if (status == 0) {
- req->req.actual += req->dma_bytes;
-
- /* return if this request needs to send data or zlp */
- if (req->req.actual < req->req.length)
- return;
- if (req->req.zero
- && req->dma_bytes != 0
- && (req->req.actual % ep->maxpacket) == 0)
- return;
- } else
- req->req.actual += dma_src_len(ep, req->req.dma
- + req->req.actual);
-
- /* tx completion */
- omap_stop_dma(ep->lch);
- w = omap_readw(UDC_DMA_IRQ_EN);
- w &= ~UDC_TX_DONE_IE(ep->dma_channel);
- omap_writew(w, UDC_DMA_IRQ_EN);
- done(ep, req, status);
-}
-
-static void next_out_dma(struct omap_ep *ep, struct omap_req *req)
-{
- unsigned packets = req->req.length - req->req.actual;
- int dma_trigger = 0;
- u16 w;
-
- /* set up this DMA transfer, enable the fifo, start */
- packets /= ep->ep.maxpacket;
- packets = min(packets, (unsigned)UDC_RXN_TC + 1);
- req->dma_bytes = packets * ep->ep.maxpacket;
- omap_set_dma_transfer_params(ep->lch, OMAP_DMA_DATA_TYPE_S16,
- ep->ep.maxpacket >> 1, packets,
- OMAP_DMA_SYNC_ELEMENT,
- dma_trigger, 0);
- omap_set_dma_dest_params(ep->lch, OMAP_DMA_PORT_EMIFF,
- OMAP_DMA_AMODE_POST_INC, req->req.dma + req->req.actual,
- 0, 0);
- ep->dma_counter = omap_get_dma_dst_pos(ep->lch);
-
- omap_writew(UDC_RXN_STOP | (packets - 1), UDC_RXDMA(ep->dma_channel));
- w = omap_readw(UDC_DMA_IRQ_EN);
- w |= UDC_RX_EOT_IE(ep->dma_channel);
- omap_writew(w, UDC_DMA_IRQ_EN);
- omap_writew(ep->bEndpointAddress & 0xf, UDC_EP_NUM);
- omap_writew(UDC_SET_FIFO_EN, UDC_CTRL);
-
- omap_start_dma(ep->lch);
-}
-
-static void
-finish_out_dma(struct omap_ep *ep, struct omap_req *req, int status, int one)
-{
- u16 count, w;
-
- if (status == 0)
- ep->dma_counter = (u16) (req->req.dma + req->req.actual);
- count = dma_dest_len(ep, req->req.dma + req->req.actual);
- count += req->req.actual;
- if (one)
- count--;
- if (count <= req->req.length)
- req->req.actual = count;
-
- if (count != req->dma_bytes || status)
- omap_stop_dma(ep->lch);
-
- /* if this wasn't short, request may need another transfer */
- else if (req->req.actual < req->req.length)
- return;
-
- /* rx completion */
- w = omap_readw(UDC_DMA_IRQ_EN);
- w &= ~UDC_RX_EOT_IE(ep->dma_channel);
- omap_writew(w, UDC_DMA_IRQ_EN);
- done(ep, req, status);
-}
-
-static void dma_irq(struct omap_udc *udc, u16 irq_src)
-{
- u16 dman_stat = omap_readw(UDC_DMAN_STAT);
- struct omap_ep *ep;
- struct omap_req *req;
-
- /* IN dma: tx to host */
- if (irq_src & UDC_TXN_DONE) {
- ep = &udc->ep[16 + UDC_DMA_TX_SRC(dman_stat)];
- ep->irqs++;
- /* can see TXN_DONE after dma abort */
- if (!list_empty(&ep->queue)) {
- req = container_of(ep->queue.next,
- struct omap_req, queue);
- finish_in_dma(ep, req, 0);
- }
- omap_writew(UDC_TXN_DONE, UDC_IRQ_SRC);
-
- if (!list_empty(&ep->queue)) {
- req = container_of(ep->queue.next,
- struct omap_req, queue);
- next_in_dma(ep, req);
- }
- }
-
- /* OUT dma: rx from host */
- if (irq_src & UDC_RXN_EOT) {
- ep = &udc->ep[UDC_DMA_RX_SRC(dman_stat)];
- ep->irqs++;
- /* can see RXN_EOT after dma abort */
- if (!list_empty(&ep->queue)) {
- req = container_of(ep->queue.next,
- struct omap_req, queue);
- finish_out_dma(ep, req, 0, dman_stat & UDC_DMA_RX_SB);
- }
- omap_writew(UDC_RXN_EOT, UDC_IRQ_SRC);
-
- if (!list_empty(&ep->queue)) {
- req = container_of(ep->queue.next,
- struct omap_req, queue);
- next_out_dma(ep, req);
- }
- }
-
- if (irq_src & UDC_RXN_CNT) {
- ep = &udc->ep[UDC_DMA_RX_SRC(dman_stat)];
- ep->irqs++;
- /* omap15xx does this unasked... */
- VDBG("%s, RX_CNT irq?\n", ep->ep.name);
- omap_writew(UDC_RXN_CNT, UDC_IRQ_SRC);
- }
-}
-
-static void dma_error(int lch, u16 ch_status, void *data)
-{
- struct omap_ep *ep = data;
-
- /* if ch_status & OMAP_DMA_DROP_IRQ ... */
- /* if ch_status & OMAP1_DMA_TOUT_IRQ ... */
- ERR("%s dma error, lch %d status %02x\n", ep->ep.name, lch, ch_status);
-
- /* complete current transfer ... */
-}
-
-static void dma_channel_claim(struct omap_ep *ep, unsigned channel)
-{
- u16 reg;
- int status, restart, is_in;
- int dma_channel;
-
- is_in = ep->bEndpointAddress & USB_DIR_IN;
- if (is_in)
- reg = omap_readw(UDC_TXDMA_CFG);
- else
- reg = omap_readw(UDC_RXDMA_CFG);
- reg |= UDC_DMA_REQ; /* "pulse" activated */
-
- ep->dma_channel = 0;
- ep->lch = -1;
- if (channel == 0 || channel > 3) {
- if ((reg & 0x0f00) == 0)
- channel = 3;
- else if ((reg & 0x00f0) == 0)
- channel = 2;
- else if ((reg & 0x000f) == 0) /* preferred for ISO */
- channel = 1;
- else {
- status = -EMLINK;
- goto just_restart;
- }
- }
- reg |= (0x0f & ep->bEndpointAddress) << (4 * (channel - 1));
- ep->dma_channel = channel;
-
- if (is_in) {
- dma_channel = OMAP_DMA_USB_W2FC_TX0 - 1 + channel;
- status = omap_request_dma(dma_channel,
- ep->ep.name, dma_error, ep, &ep->lch);
- if (status == 0) {
- omap_writew(reg, UDC_TXDMA_CFG);
- /* EMIFF or SDRC */
- omap_set_dma_src_burst_mode(ep->lch,
- OMAP_DMA_DATA_BURST_4);
- omap_set_dma_src_data_pack(ep->lch, 1);
- /* TIPB */
- omap_set_dma_dest_params(ep->lch,
- OMAP_DMA_PORT_TIPB,
- OMAP_DMA_AMODE_CONSTANT,
- UDC_DATA_DMA,
- 0, 0);
- }
- } else {
- dma_channel = OMAP_DMA_USB_W2FC_RX0 - 1 + channel;
- status = omap_request_dma(dma_channel,
- ep->ep.name, dma_error, ep, &ep->lch);
- if (status == 0) {
- omap_writew(reg, UDC_RXDMA_CFG);
- /* TIPB */
- omap_set_dma_src_params(ep->lch,
- OMAP_DMA_PORT_TIPB,
- OMAP_DMA_AMODE_CONSTANT,
- UDC_DATA_DMA,
- 0, 0);
- /* EMIFF or SDRC */
- omap_set_dma_dest_burst_mode(ep->lch,
- OMAP_DMA_DATA_BURST_4);
- omap_set_dma_dest_data_pack(ep->lch, 1);
- }
- }
- if (status)
- ep->dma_channel = 0;
- else {
- ep->has_dma = 1;
- omap_disable_dma_irq(ep->lch, OMAP_DMA_BLOCK_IRQ);
-
- /* channel type P: hw synch (fifo) */
- if (!cpu_is_omap15xx())
- omap_set_dma_channel_mode(ep->lch, OMAP_DMA_LCH_P);
- }
-
-just_restart:
- /* restart any queue, even if the claim failed */
- restart = !ep->stopped && !list_empty(&ep->queue);
-
- if (status)
- DBG("%s no dma channel: %d%s\n", ep->ep.name, status,
- restart ? " (restart)" : "");
- else
- DBG("%s claimed %cxdma%d lch %d%s\n", ep->ep.name,
- is_in ? 't' : 'r',
- ep->dma_channel - 1, ep->lch,
- restart ? " (restart)" : "");
-
- if (restart) {
- struct omap_req *req;
- req = container_of(ep->queue.next, struct omap_req, queue);
- if (ep->has_dma)
- (is_in ? next_in_dma : next_out_dma)(ep, req);
- else {
- use_ep(ep, UDC_EP_SEL);
- (is_in ? write_fifo : read_fifo)(ep, req);
- deselect_ep();
- if (!is_in) {
- omap_writew(UDC_SET_FIFO_EN, UDC_CTRL);
- ep->ackwait = 1 + ep->double_buf;
- }
- /* IN: 6 wait states before it'll tx */
- }
- }
-}
-
-static void dma_channel_release(struct omap_ep *ep)
-{
- int shift = 4 * (ep->dma_channel - 1);
- u16 mask = 0x0f << shift;
- struct omap_req *req;
- int active;
-
- /* abort any active usb transfer request */
- if (!list_empty(&ep->queue))
- req = container_of(ep->queue.next, struct omap_req, queue);
- else
- req = NULL;
-
- active = omap_get_dma_active_status(ep->lch);
-
- DBG("%s release %s %cxdma%d %p\n", ep->ep.name,
- active ? "active" : "idle",
- (ep->bEndpointAddress & USB_DIR_IN) ? 't' : 'r',
- ep->dma_channel - 1, req);
-
- /* NOTE: re-setting RX_REQ/TX_REQ because of a chip bug (before
- * OMAP 1710 ES2.0) where reading the DMA_CFG can clear them.
- */
-
- /* wait till current packet DMA finishes, and fifo empties */
- if (ep->bEndpointAddress & USB_DIR_IN) {
- omap_writew((omap_readw(UDC_TXDMA_CFG) & ~mask) | UDC_DMA_REQ,
- UDC_TXDMA_CFG);
-
- if (req) {
- finish_in_dma(ep, req, -ECONNRESET);
-
- /* clear FIFO; hosts probably won't empty it */
- use_ep(ep, UDC_EP_SEL);
- omap_writew(UDC_CLR_EP, UDC_CTRL);
- deselect_ep();
- }
- while (omap_readw(UDC_TXDMA_CFG) & mask)
- udelay(10);
- } else {
- omap_writew((omap_readw(UDC_RXDMA_CFG) & ~mask) | UDC_DMA_REQ,
- UDC_RXDMA_CFG);
-
- /* dma empties the fifo */
- while (omap_readw(UDC_RXDMA_CFG) & mask)
- udelay(10);
- if (req)
- finish_out_dma(ep, req, -ECONNRESET, 0);
- }
- omap_free_dma(ep->lch);
- ep->dma_channel = 0;
- ep->lch = -1;
- /* has_dma still set, till endpoint is fully quiesced */
-}
-
-
-/*-------------------------------------------------------------------------*/
-
-static int
-omap_ep_queue(struct usb_ep *_ep, struct usb_request *_req, gfp_t gfp_flags)
-{
- struct omap_ep *ep = container_of(_ep, struct omap_ep, ep);
- struct omap_req *req = container_of(_req, struct omap_req, req);
- struct omap_udc *udc;
- unsigned long flags;
- int is_iso = 0;
-
- /* catch various bogus parameters */
- if (!_req || !req->req.complete || !req->req.buf
- || !list_empty(&req->queue)) {
- DBG("%s, bad params\n", __func__);
- return -EINVAL;
- }
- if (!_ep || (!ep->ep.desc && ep->bEndpointAddress)) {
- DBG("%s, bad ep\n", __func__);
- return -EINVAL;
- }
- if (ep->bmAttributes == USB_ENDPOINT_XFER_ISOC) {
- if (req->req.length > ep->ep.maxpacket)
- return -EMSGSIZE;
- is_iso = 1;
- }
-
- /* this isn't bogus, but OMAP DMA isn't the only hardware to
- * have a hard time with partial packet reads... reject it.
- */
- if (use_dma
- && ep->has_dma
- && ep->bEndpointAddress != 0
- && (ep->bEndpointAddress & USB_DIR_IN) == 0
- && (req->req.length % ep->ep.maxpacket) != 0) {
- DBG("%s, no partial packet OUT reads\n", __func__);
- return -EMSGSIZE;
- }
-
- udc = ep->udc;
- if (!udc->driver || udc->gadget.speed == USB_SPEED_UNKNOWN)
- return -ESHUTDOWN;
-
- if (use_dma && ep->has_dma)
- usb_gadget_map_request(&udc->gadget, &req->req,
- (ep->bEndpointAddress & USB_DIR_IN));
-
- VDBG("%s queue req %p, len %d buf %p\n",
- ep->ep.name, _req, _req->length, _req->buf);
-
- spin_lock_irqsave(&udc->lock, flags);
-
- req->req.status = -EINPROGRESS;
- req->req.actual = 0;
-
- /* maybe kickstart non-iso i/o queues */
- if (is_iso) {
- u16 w;
-
- w = omap_readw(UDC_IRQ_EN);
- w |= UDC_SOF_IE;
- omap_writew(w, UDC_IRQ_EN);
- } else if (list_empty(&ep->queue) && !ep->stopped && !ep->ackwait) {
- int is_in;
-
- if (ep->bEndpointAddress == 0) {
- if (!udc->ep0_pending || !list_empty(&ep->queue)) {
- spin_unlock_irqrestore(&udc->lock, flags);
- return -EL2HLT;
- }
-
- /* empty DATA stage? */
- is_in = udc->ep0_in;
- if (!req->req.length) {
-
- /* chip became CONFIGURED or ADDRESSED
- * earlier; drivers may already have queued
- * requests to non-control endpoints
- */
- if (udc->ep0_set_config) {
- u16 irq_en = omap_readw(UDC_IRQ_EN);
-
- irq_en |= UDC_DS_CHG_IE | UDC_EP0_IE;
- if (!udc->ep0_reset_config)
- irq_en |= UDC_EPN_RX_IE
- | UDC_EPN_TX_IE;
- omap_writew(irq_en, UDC_IRQ_EN);
- }
-
- /* STATUS for zero length DATA stages is
- * always an IN ... even for IN transfers,
- * a weird case which seem to stall OMAP.
- */
- omap_writew(UDC_EP_SEL | UDC_EP_DIR,
- UDC_EP_NUM);
- omap_writew(UDC_CLR_EP, UDC_CTRL);
- omap_writew(UDC_SET_FIFO_EN, UDC_CTRL);
- omap_writew(UDC_EP_DIR, UDC_EP_NUM);
-
- /* cleanup */
- udc->ep0_pending = 0;
- done(ep, req, 0);
- req = NULL;
-
- /* non-empty DATA stage */
- } else if (is_in) {
- omap_writew(UDC_EP_SEL | UDC_EP_DIR,
- UDC_EP_NUM);
- } else {
- if (udc->ep0_setup)
- goto irq_wait;
- omap_writew(UDC_EP_SEL, UDC_EP_NUM);
- }
- } else {
- is_in = ep->bEndpointAddress & USB_DIR_IN;
- if (!ep->has_dma)
- use_ep(ep, UDC_EP_SEL);
- /* if ISO: SOF IRQs must be enabled/disabled! */
- }
-
- if (ep->has_dma)
- (is_in ? next_in_dma : next_out_dma)(ep, req);
- else if (req) {
- if ((is_in ? write_fifo : read_fifo)(ep, req) == 1)
- req = NULL;
- deselect_ep();
- if (!is_in) {
- omap_writew(UDC_SET_FIFO_EN, UDC_CTRL);
- ep->ackwait = 1 + ep->double_buf;
- }
- /* IN: 6 wait states before it'll tx */
- }
- }
-
-irq_wait:
- /* irq handler advances the queue */
- if (req != NULL)
- list_add_tail(&req->queue, &ep->queue);
- spin_unlock_irqrestore(&udc->lock, flags);
-
- return 0;
-}
-
-static int omap_ep_dequeue(struct usb_ep *_ep, struct usb_request *_req)
-{
- struct omap_ep *ep = container_of(_ep, struct omap_ep, ep);
- struct omap_req *req = NULL, *iter;
- unsigned long flags;
-
- if (!_ep || !_req)
- return -EINVAL;
-
- spin_lock_irqsave(&ep->udc->lock, flags);
-
- /* make sure it's actually queued on this endpoint */
- list_for_each_entry(iter, &ep->queue, queue) {
- if (&iter->req != _req)
- continue;
- req = iter;
- break;
- }
- if (!req) {
- spin_unlock_irqrestore(&ep->udc->lock, flags);
- return -EINVAL;
- }
-
- if (use_dma && ep->dma_channel && ep->queue.next == &req->queue) {
- int channel = ep->dma_channel;
-
- /* releasing the channel cancels the request,
- * reclaiming the channel restarts the queue
- */
- dma_channel_release(ep);
- dma_channel_claim(ep, channel);
- } else
- done(ep, req, -ECONNRESET);
- spin_unlock_irqrestore(&ep->udc->lock, flags);
- return 0;
-}
-
-/*-------------------------------------------------------------------------*/
-
-static int omap_ep_set_halt(struct usb_ep *_ep, int value)
-{
- struct omap_ep *ep = container_of(_ep, struct omap_ep, ep);
- unsigned long flags;
- int status = -EOPNOTSUPP;
-
- spin_lock_irqsave(&ep->udc->lock, flags);
-
- /* just use protocol stalls for ep0; real halts are annoying */
- if (ep->bEndpointAddress == 0) {
- if (!ep->udc->ep0_pending)
- status = -EINVAL;
- else if (value) {
- if (ep->udc->ep0_set_config) {
- WARNING("error changing config?\n");
- omap_writew(UDC_CLR_CFG, UDC_SYSCON2);
- }
- omap_writew(UDC_STALL_CMD, UDC_SYSCON2);
- ep->udc->ep0_pending = 0;
- status = 0;
- } else /* NOP */
- status = 0;
-
- /* otherwise, all active non-ISO endpoints can halt */
- } else if (ep->bmAttributes != USB_ENDPOINT_XFER_ISOC && ep->ep.desc) {
-
- /* IN endpoints must already be idle */
- if ((ep->bEndpointAddress & USB_DIR_IN)
- && !list_empty(&ep->queue)) {
- status = -EAGAIN;
- goto done;
- }
-
- if (value) {
- int channel;
-
- if (use_dma && ep->dma_channel
- && !list_empty(&ep->queue)) {
- channel = ep->dma_channel;
- dma_channel_release(ep);
- } else
- channel = 0;
-
- use_ep(ep, UDC_EP_SEL);
- if (omap_readw(UDC_STAT_FLG) & UDC_NON_ISO_FIFO_EMPTY) {
- omap_writew(UDC_SET_HALT, UDC_CTRL);
- status = 0;
- } else
- status = -EAGAIN;
- deselect_ep();
-
- if (channel)
- dma_channel_claim(ep, channel);
- } else {
- use_ep(ep, 0);
- omap_writew(ep->udc->clr_halt, UDC_CTRL);
- ep->ackwait = 0;
- if (!(ep->bEndpointAddress & USB_DIR_IN)) {
- omap_writew(UDC_SET_FIFO_EN, UDC_CTRL);
- ep->ackwait = 1 + ep->double_buf;
- }
- }
- }
-done:
- VDBG("%s %s halt stat %d\n", ep->ep.name,
- value ? "set" : "clear", status);
-
- spin_unlock_irqrestore(&ep->udc->lock, flags);
- return status;
-}
-
-static const struct usb_ep_ops omap_ep_ops = {
- .enable = omap_ep_enable,
- .disable = omap_ep_disable,
-
- .alloc_request = omap_alloc_request,
- .free_request = omap_free_request,
-
- .queue = omap_ep_queue,
- .dequeue = omap_ep_dequeue,
-
- .set_halt = omap_ep_set_halt,
- /* fifo_status ... report bytes in fifo */
- /* fifo_flush ... flush fifo */
-};
-
-/*-------------------------------------------------------------------------*/
-
-static int omap_get_frame(struct usb_gadget *gadget)
-{
- u16 sof = omap_readw(UDC_SOF);
- return (sof & UDC_TS_OK) ? (sof & UDC_TS) : -EL2NSYNC;
-}
-
-static int omap_wakeup(struct usb_gadget *gadget)
-{
- struct omap_udc *udc;
- unsigned long flags;
- int retval = -EHOSTUNREACH;
-
- udc = container_of(gadget, struct omap_udc, gadget);
-
- spin_lock_irqsave(&udc->lock, flags);
- if (udc->devstat & UDC_SUS) {
- /* NOTE: OTG spec erratum says that OTG devices may
- * issue wakeups without host enable.
- */
- if (udc->devstat & (UDC_B_HNP_ENABLE|UDC_R_WK_OK)) {
- DBG("remote wakeup...\n");
- omap_writew(UDC_RMT_WKP, UDC_SYSCON2);
- retval = 0;
- }
-
- /* NOTE: non-OTG systems may use SRP TOO... */
- } else if (!(udc->devstat & UDC_ATT)) {
- if (!IS_ERR_OR_NULL(udc->transceiver))
- retval = otg_start_srp(udc->transceiver->otg);
- }
- spin_unlock_irqrestore(&udc->lock, flags);
-
- return retval;
-}
-
-static int
-omap_set_selfpowered(struct usb_gadget *gadget, int is_selfpowered)
-{
- struct omap_udc *udc;
- unsigned long flags;
- u16 syscon1;
-
- gadget->is_selfpowered = (is_selfpowered != 0);
- udc = container_of(gadget, struct omap_udc, gadget);
- spin_lock_irqsave(&udc->lock, flags);
- syscon1 = omap_readw(UDC_SYSCON1);
- if (is_selfpowered)
- syscon1 |= UDC_SELF_PWR;
- else
- syscon1 &= ~UDC_SELF_PWR;
- omap_writew(syscon1, UDC_SYSCON1);
- spin_unlock_irqrestore(&udc->lock, flags);
-
- return 0;
-}
-
-static int can_pullup(struct omap_udc *udc)
-{
- return udc->driver && udc->softconnect && udc->vbus_active;
-}
-
-static void pullup_enable(struct omap_udc *udc)
-{
- u16 w;
-
- w = omap_readw(UDC_SYSCON1);
- w |= UDC_PULLUP_EN;
- omap_writew(w, UDC_SYSCON1);
- if (!gadget_is_otg(&udc->gadget) && !cpu_is_omap15xx()) {
- u32 l;
-
- l = omap_readl(OTG_CTRL);
- l |= OTG_BSESSVLD;
- omap_writel(l, OTG_CTRL);
- }
- omap_writew(UDC_DS_CHG_IE, UDC_IRQ_EN);
-}
-
-static void pullup_disable(struct omap_udc *udc)
-{
- u16 w;
-
- if (!gadget_is_otg(&udc->gadget) && !cpu_is_omap15xx()) {
- u32 l;
-
- l = omap_readl(OTG_CTRL);
- l &= ~OTG_BSESSVLD;
- omap_writel(l, OTG_CTRL);
- }
- omap_writew(UDC_DS_CHG_IE, UDC_IRQ_EN);
- w = omap_readw(UDC_SYSCON1);
- w &= ~UDC_PULLUP_EN;
- omap_writew(w, UDC_SYSCON1);
-}
-
-static struct omap_udc *udc;
-
-static void omap_udc_enable_clock(int enable)
-{
- if (udc == NULL || udc->dc_clk == NULL || udc->hhc_clk == NULL)
- return;
-
- if (enable) {
- clk_enable(udc->dc_clk);
- clk_enable(udc->hhc_clk);
- udelay(100);
- } else {
- clk_disable(udc->hhc_clk);
- clk_disable(udc->dc_clk);
- }
-}
-
-/*
- * Called by whatever detects VBUS sessions: external transceiver
- * driver, or maybe GPIO0 VBUS IRQ. May request 48 MHz clock.
- */
-static int omap_vbus_session(struct usb_gadget *gadget, int is_active)
-{
- struct omap_udc *udc;
- unsigned long flags;
- u32 l;
-
- udc = container_of(gadget, struct omap_udc, gadget);
- spin_lock_irqsave(&udc->lock, flags);
- VDBG("VBUS %s\n", is_active ? "on" : "off");
- udc->vbus_active = (is_active != 0);
- if (cpu_is_omap15xx()) {
- /* "software" detect, ignored if !VBUS_MODE_1510 */
- l = omap_readl(FUNC_MUX_CTRL_0);
- if (is_active)
- l |= VBUS_CTRL_1510;
- else
- l &= ~VBUS_CTRL_1510;
- omap_writel(l, FUNC_MUX_CTRL_0);
- }
- if (udc->dc_clk != NULL && is_active) {
- if (!udc->clk_requested) {
- omap_udc_enable_clock(1);
- udc->clk_requested = 1;
- }
- }
- if (can_pullup(udc))
- pullup_enable(udc);
- else
- pullup_disable(udc);
- if (udc->dc_clk != NULL && !is_active) {
- if (udc->clk_requested) {
- omap_udc_enable_clock(0);
- udc->clk_requested = 0;
- }
- }
- spin_unlock_irqrestore(&udc->lock, flags);
- return 0;
-}
-
-static int omap_vbus_draw(struct usb_gadget *gadget, unsigned mA)
-{
- struct omap_udc *udc;
-
- udc = container_of(gadget, struct omap_udc, gadget);
- if (!IS_ERR_OR_NULL(udc->transceiver))
- return usb_phy_set_power(udc->transceiver, mA);
- return -EOPNOTSUPP;
-}
-
-static int omap_pullup(struct usb_gadget *gadget, int is_on)
-{
- struct omap_udc *udc;
- unsigned long flags;
-
- udc = container_of(gadget, struct omap_udc, gadget);
- spin_lock_irqsave(&udc->lock, flags);
- udc->softconnect = (is_on != 0);
- if (can_pullup(udc))
- pullup_enable(udc);
- else
- pullup_disable(udc);
- spin_unlock_irqrestore(&udc->lock, flags);
- return 0;
-}
-
-static int omap_udc_start(struct usb_gadget *g,
- struct usb_gadget_driver *driver);
-static int omap_udc_stop(struct usb_gadget *g);
-
-static const struct usb_gadget_ops omap_gadget_ops = {
- .get_frame = omap_get_frame,
- .wakeup = omap_wakeup,
- .set_selfpowered = omap_set_selfpowered,
- .vbus_session = omap_vbus_session,
- .vbus_draw = omap_vbus_draw,
- .pullup = omap_pullup,
- .udc_start = omap_udc_start,
- .udc_stop = omap_udc_stop,
-};
-
-/*-------------------------------------------------------------------------*/
-
-/* dequeue ALL requests; caller holds udc->lock */
-static void nuke(struct omap_ep *ep, int status)
-{
- struct omap_req *req;
-
- ep->stopped = 1;
-
- if (use_dma && ep->dma_channel)
- dma_channel_release(ep);
-
- use_ep(ep, 0);
- omap_writew(UDC_CLR_EP, UDC_CTRL);
- if (ep->bEndpointAddress && ep->bmAttributes != USB_ENDPOINT_XFER_ISOC)
- omap_writew(UDC_SET_HALT, UDC_CTRL);
-
- while (!list_empty(&ep->queue)) {
- req = list_entry(ep->queue.next, struct omap_req, queue);
- done(ep, req, status);
- }
-}
-
-/* caller holds udc->lock */
-static void udc_quiesce(struct omap_udc *udc)
-{
- struct omap_ep *ep;
-
- udc->gadget.speed = USB_SPEED_UNKNOWN;
- nuke(&udc->ep[0], -ESHUTDOWN);
- list_for_each_entry(ep, &udc->gadget.ep_list, ep.ep_list)
- nuke(ep, -ESHUTDOWN);
-}
-
-/*-------------------------------------------------------------------------*/
-
-static void update_otg(struct omap_udc *udc)
-{
- u16 devstat;
-
- if (!gadget_is_otg(&udc->gadget))
- return;
-
- if (omap_readl(OTG_CTRL) & OTG_ID)
- devstat = omap_readw(UDC_DEVSTAT);
- else
- devstat = 0;
-
- udc->gadget.b_hnp_enable = !!(devstat & UDC_B_HNP_ENABLE);
- udc->gadget.a_hnp_support = !!(devstat & UDC_A_HNP_SUPPORT);
- udc->gadget.a_alt_hnp_support = !!(devstat & UDC_A_ALT_HNP_SUPPORT);
-
- /* Enable HNP early, avoiding races on suspend irq path.
- * ASSUMES OTG state machine B_BUS_REQ input is true.
- */
- if (udc->gadget.b_hnp_enable) {
- u32 l;
-
- l = omap_readl(OTG_CTRL);
- l |= OTG_B_HNPEN | OTG_B_BUSREQ;
- l &= ~OTG_PULLUP;
- omap_writel(l, OTG_CTRL);
- }
-}
-
-static void ep0_irq(struct omap_udc *udc, u16 irq_src)
-{
- struct omap_ep *ep0 = &udc->ep[0];
- struct omap_req *req = NULL;
-
- ep0->irqs++;
-
- /* Clear any pending requests and then scrub any rx/tx state
- * before starting to handle the SETUP request.
- */
- if (irq_src & UDC_SETUP) {
- u16 ack = irq_src & (UDC_EP0_TX|UDC_EP0_RX);
-
- nuke(ep0, 0);
- if (ack) {
- omap_writew(ack, UDC_IRQ_SRC);
- irq_src = UDC_SETUP;
- }
- }
-
- /* IN/OUT packets mean we're in the DATA or STATUS stage.
- * This driver uses only uses protocol stalls (ep0 never halts),
- * and if we got this far the gadget driver already had a
- * chance to stall. Tries to be forgiving of host oddities.
- *
- * NOTE: the last chance gadget drivers have to stall control
- * requests is during their request completion callback.
- */
- if (!list_empty(&ep0->queue))
- req = container_of(ep0->queue.next, struct omap_req, queue);
-
- /* IN == TX to host */
- if (irq_src & UDC_EP0_TX) {
- int stat;
-
- omap_writew(UDC_EP0_TX, UDC_IRQ_SRC);
- omap_writew(UDC_EP_SEL|UDC_EP_DIR, UDC_EP_NUM);
- stat = omap_readw(UDC_STAT_FLG);
- if (stat & UDC_ACK) {
- if (udc->ep0_in) {
- /* write next IN packet from response,
- * or set up the status stage.
- */
- if (req)
- stat = write_fifo(ep0, req);
- omap_writew(UDC_EP_DIR, UDC_EP_NUM);
- if (!req && udc->ep0_pending) {
- omap_writew(UDC_EP_SEL, UDC_EP_NUM);
- omap_writew(UDC_CLR_EP, UDC_CTRL);
- omap_writew(UDC_SET_FIFO_EN, UDC_CTRL);
- omap_writew(0, UDC_EP_NUM);
- udc->ep0_pending = 0;
- } /* else: 6 wait states before it'll tx */
- } else {
- /* ack status stage of OUT transfer */
- omap_writew(UDC_EP_DIR, UDC_EP_NUM);
- if (req)
- done(ep0, req, 0);
- }
- req = NULL;
- } else if (stat & UDC_STALL) {
- omap_writew(UDC_CLR_HALT, UDC_CTRL);
- omap_writew(UDC_EP_DIR, UDC_EP_NUM);
- } else {
- omap_writew(UDC_EP_DIR, UDC_EP_NUM);
- }
- }
-
- /* OUT == RX from host */
- if (irq_src & UDC_EP0_RX) {
- int stat;
-
- omap_writew(UDC_EP0_RX, UDC_IRQ_SRC);
- omap_writew(UDC_EP_SEL, UDC_EP_NUM);
- stat = omap_readw(UDC_STAT_FLG);
- if (stat & UDC_ACK) {
- if (!udc->ep0_in) {
- stat = 0;
- /* read next OUT packet of request, maybe
- * reactivating the fifo; stall on errors.
- */
- stat = read_fifo(ep0, req);
- if (!req || stat < 0) {
- omap_writew(UDC_STALL_CMD, UDC_SYSCON2);
- udc->ep0_pending = 0;
- stat = 0;
- } else if (stat == 0)
- omap_writew(UDC_SET_FIFO_EN, UDC_CTRL);
- omap_writew(0, UDC_EP_NUM);
-
- /* activate status stage */
- if (stat == 1) {
- done(ep0, req, 0);
- /* that may have STALLed ep0... */
- omap_writew(UDC_EP_SEL | UDC_EP_DIR,
- UDC_EP_NUM);
- omap_writew(UDC_CLR_EP, UDC_CTRL);
- omap_writew(UDC_SET_FIFO_EN, UDC_CTRL);
- omap_writew(UDC_EP_DIR, UDC_EP_NUM);
- udc->ep0_pending = 0;
- }
- } else {
- /* ack status stage of IN transfer */
- omap_writew(0, UDC_EP_NUM);
- if (req)
- done(ep0, req, 0);
- }
- } else if (stat & UDC_STALL) {
- omap_writew(UDC_CLR_HALT, UDC_CTRL);
- omap_writew(0, UDC_EP_NUM);
- } else {
- omap_writew(0, UDC_EP_NUM);
- }
- }
-
- /* SETUP starts all control transfers */
- if (irq_src & UDC_SETUP) {
- union u {
- u16 word[4];
- struct usb_ctrlrequest r;
- } u;
- int status = -EINVAL;
- struct omap_ep *ep;
-
- /* read the (latest) SETUP message */
- do {
- omap_writew(UDC_SETUP_SEL, UDC_EP_NUM);
- /* two bytes at a time */
- u.word[0] = omap_readw(UDC_DATA);
- u.word[1] = omap_readw(UDC_DATA);
- u.word[2] = omap_readw(UDC_DATA);
- u.word[3] = omap_readw(UDC_DATA);
- omap_writew(0, UDC_EP_NUM);
- } while (omap_readw(UDC_IRQ_SRC) & UDC_SETUP);
-
-#define w_value le16_to_cpu(u.r.wValue)
-#define w_index le16_to_cpu(u.r.wIndex)
-#define w_length le16_to_cpu(u.r.wLength)
-
- /* Delegate almost all control requests to the gadget driver,
- * except for a handful of ch9 status/feature requests that
- * hardware doesn't autodecode _and_ the gadget API hides.
- */
- udc->ep0_in = (u.r.bRequestType & USB_DIR_IN) != 0;
- udc->ep0_set_config = 0;
- udc->ep0_pending = 1;
- ep0->stopped = 0;
- ep0->ackwait = 0;
- switch (u.r.bRequest) {
- case USB_REQ_SET_CONFIGURATION:
- /* udc needs to know when ep != 0 is valid */
- if (u.r.bRequestType != USB_RECIP_DEVICE)
- goto delegate;
- if (w_length != 0)
- goto do_stall;
- udc->ep0_set_config = 1;
- udc->ep0_reset_config = (w_value == 0);
- VDBG("set config %d\n", w_value);
-
- /* update udc NOW since gadget driver may start
- * queueing requests immediately; clear config
- * later if it fails the request.
- */
- if (udc->ep0_reset_config)
- omap_writew(UDC_CLR_CFG, UDC_SYSCON2);
- else
- omap_writew(UDC_DEV_CFG, UDC_SYSCON2);
- update_otg(udc);
- goto delegate;
- case USB_REQ_CLEAR_FEATURE:
- /* clear endpoint halt */
- if (u.r.bRequestType != USB_RECIP_ENDPOINT)
- goto delegate;
- if (w_value != USB_ENDPOINT_HALT
- || w_length != 0)
- goto do_stall;
- ep = &udc->ep[w_index & 0xf];
- if (ep != ep0) {
- if (w_index & USB_DIR_IN)
- ep += 16;
- if (ep->bmAttributes == USB_ENDPOINT_XFER_ISOC
- || !ep->ep.desc)
- goto do_stall;
- use_ep(ep, 0);
- omap_writew(udc->clr_halt, UDC_CTRL);
- ep->ackwait = 0;
- if (!(ep->bEndpointAddress & USB_DIR_IN)) {
- omap_writew(UDC_SET_FIFO_EN, UDC_CTRL);
- ep->ackwait = 1 + ep->double_buf;
- }
- /* NOTE: assumes the host behaves sanely,
- * only clearing real halts. Else we may
- * need to kill pending transfers and then
- * restart the queue... very messy for DMA!
- */
- }
- VDBG("%s halt cleared by host\n", ep->name);
- goto ep0out_status_stage;
- case USB_REQ_SET_FEATURE:
- /* set endpoint halt */
- if (u.r.bRequestType != USB_RECIP_ENDPOINT)
- goto delegate;
- if (w_value != USB_ENDPOINT_HALT
- || w_length != 0)
- goto do_stall;
- ep = &udc->ep[w_index & 0xf];
- if (w_index & USB_DIR_IN)
- ep += 16;
- if (ep->bmAttributes == USB_ENDPOINT_XFER_ISOC
- || ep == ep0 || !ep->ep.desc)
- goto do_stall;
- if (use_dma && ep->has_dma) {
- /* this has rude side-effects (aborts) and
- * can't really work if DMA-IN is active
- */
- DBG("%s host set_halt, NYET\n", ep->name);
- goto do_stall;
- }
- use_ep(ep, 0);
- /* can't halt if fifo isn't empty... */
- omap_writew(UDC_CLR_EP, UDC_CTRL);
- omap_writew(UDC_SET_HALT, UDC_CTRL);
- VDBG("%s halted by host\n", ep->name);
-ep0out_status_stage:
- status = 0;
- omap_writew(UDC_EP_SEL|UDC_EP_DIR, UDC_EP_NUM);
- omap_writew(UDC_CLR_EP, UDC_CTRL);
- omap_writew(UDC_SET_FIFO_EN, UDC_CTRL);
- omap_writew(UDC_EP_DIR, UDC_EP_NUM);
- udc->ep0_pending = 0;
- break;
- case USB_REQ_GET_STATUS:
- /* USB_ENDPOINT_HALT status? */
- if (u.r.bRequestType != (USB_DIR_IN|USB_RECIP_ENDPOINT))
- goto intf_status;
-
- /* ep0 never stalls */
- if (!(w_index & 0xf))
- goto zero_status;
-
- /* only active endpoints count */
- ep = &udc->ep[w_index & 0xf];
- if (w_index & USB_DIR_IN)
- ep += 16;
- if (!ep->ep.desc)
- goto do_stall;
-
- /* iso never stalls */
- if (ep->bmAttributes == USB_ENDPOINT_XFER_ISOC)
- goto zero_status;
-
- /* FIXME don't assume non-halted endpoints!! */
- ERR("%s status, can't report\n", ep->ep.name);
- goto do_stall;
-
-intf_status:
- /* return interface status. if we were pedantic,
- * we'd detect non-existent interfaces, and stall.
- */
- if (u.r.bRequestType
- != (USB_DIR_IN|USB_RECIP_INTERFACE))
- goto delegate;
-
-zero_status:
- /* return two zero bytes */
- omap_writew(UDC_EP_SEL|UDC_EP_DIR, UDC_EP_NUM);
- omap_writew(0, UDC_DATA);
- omap_writew(UDC_SET_FIFO_EN, UDC_CTRL);
- omap_writew(UDC_EP_DIR, UDC_EP_NUM);
- status = 0;
- VDBG("GET_STATUS, interface %d\n", w_index);
- /* next, status stage */
- break;
- default:
-delegate:
- /* activate the ep0out fifo right away */
- if (!udc->ep0_in && w_length) {
- omap_writew(0, UDC_EP_NUM);
- omap_writew(UDC_SET_FIFO_EN, UDC_CTRL);
- }
-
- /* gadget drivers see class/vendor specific requests,
- * {SET,GET}_{INTERFACE,DESCRIPTOR,CONFIGURATION},
- * and more
- */
- VDBG("SETUP %02x.%02x v%04x i%04x l%04x\n",
- u.r.bRequestType, u.r.bRequest,
- w_value, w_index, w_length);
-
-#undef w_value
-#undef w_index
-#undef w_length
-
- /* The gadget driver may return an error here,
- * causing an immediate protocol stall.
- *
- * Else it must issue a response, either queueing a
- * response buffer for the DATA stage, or halting ep0
- * (causing a protocol stall, not a real halt). A
- * zero length buffer means no DATA stage.
- *
- * It's fine to issue that response after the setup()
- * call returns, and this IRQ was handled.
- */
- udc->ep0_setup = 1;
- spin_unlock(&udc->lock);
- status = udc->driver->setup(&udc->gadget, &u.r);
- spin_lock(&udc->lock);
- udc->ep0_setup = 0;
- }
-
- if (status < 0) {
-do_stall:
- VDBG("req %02x.%02x protocol STALL; stat %d\n",
- u.r.bRequestType, u.r.bRequest, status);
- if (udc->ep0_set_config) {
- if (udc->ep0_reset_config)
- WARNING("error resetting config?\n");
- else
- omap_writew(UDC_CLR_CFG, UDC_SYSCON2);
- }
- omap_writew(UDC_STALL_CMD, UDC_SYSCON2);
- udc->ep0_pending = 0;
- }
- }
-}
-
-/*-------------------------------------------------------------------------*/
-
-#define OTG_FLAGS (UDC_B_HNP_ENABLE|UDC_A_HNP_SUPPORT|UDC_A_ALT_HNP_SUPPORT)
-
-static void devstate_irq(struct omap_udc *udc, u16 irq_src)
-{
- u16 devstat, change;
-
- devstat = omap_readw(UDC_DEVSTAT);
- change = devstat ^ udc->devstat;
- udc->devstat = devstat;
-
- if (change & (UDC_USB_RESET|UDC_ATT)) {
- udc_quiesce(udc);
-
- if (change & UDC_ATT) {
- /* driver for any external transceiver will
- * have called omap_vbus_session() already
- */
- if (devstat & UDC_ATT) {
- udc->gadget.speed = USB_SPEED_FULL;
- VDBG("connect\n");
- if (IS_ERR_OR_NULL(udc->transceiver))
- pullup_enable(udc);
- /* if (driver->connect) call it */
- } else if (udc->gadget.speed != USB_SPEED_UNKNOWN) {
- udc->gadget.speed = USB_SPEED_UNKNOWN;
- if (IS_ERR_OR_NULL(udc->transceiver))
- pullup_disable(udc);
- DBG("disconnect, gadget %s\n",
- udc->driver->driver.name);
- if (udc->driver->disconnect) {
- spin_unlock(&udc->lock);
- udc->driver->disconnect(&udc->gadget);
- spin_lock(&udc->lock);
- }
- }
- change &= ~UDC_ATT;
- }
-
- if (change & UDC_USB_RESET) {
- if (devstat & UDC_USB_RESET) {
- VDBG("RESET=1\n");
- } else {
- udc->gadget.speed = USB_SPEED_FULL;
- INFO("USB reset done, gadget %s\n",
- udc->driver->driver.name);
- /* ep0 traffic is legal from now on */
- omap_writew(UDC_DS_CHG_IE | UDC_EP0_IE,
- UDC_IRQ_EN);
- }
- change &= ~UDC_USB_RESET;
- }
- }
- if (change & UDC_SUS) {
- if (udc->gadget.speed != USB_SPEED_UNKNOWN) {
- /* FIXME tell isp1301 to suspend/resume (?) */
- if (devstat & UDC_SUS) {
- VDBG("suspend\n");
- update_otg(udc);
- /* HNP could be under way already */
- if (udc->gadget.speed == USB_SPEED_FULL
- && udc->driver->suspend) {
- spin_unlock(&udc->lock);
- udc->driver->suspend(&udc->gadget);
- spin_lock(&udc->lock);
- }
- if (!IS_ERR_OR_NULL(udc->transceiver))
- usb_phy_set_suspend(
- udc->transceiver, 1);
- } else {
- VDBG("resume\n");
- if (!IS_ERR_OR_NULL(udc->transceiver))
- usb_phy_set_suspend(
- udc->transceiver, 0);
- if (udc->gadget.speed == USB_SPEED_FULL
- && udc->driver->resume) {
- spin_unlock(&udc->lock);
- udc->driver->resume(&udc->gadget);
- spin_lock(&udc->lock);
- }
- }
- }
- change &= ~UDC_SUS;
- }
- if (!cpu_is_omap15xx() && (change & OTG_FLAGS)) {
- update_otg(udc);
- change &= ~OTG_FLAGS;
- }
-
- change &= ~(UDC_CFG|UDC_DEF|UDC_ADD);
- if (change)
- VDBG("devstat %03x, ignore change %03x\n",
- devstat, change);
-
- omap_writew(UDC_DS_CHG, UDC_IRQ_SRC);
-}
-
-static irqreturn_t omap_udc_irq(int irq, void *_udc)
-{
- struct omap_udc *udc = _udc;
- u16 irq_src;
- irqreturn_t status = IRQ_NONE;
- unsigned long flags;
-
- spin_lock_irqsave(&udc->lock, flags);
- irq_src = omap_readw(UDC_IRQ_SRC);
-
- /* Device state change (usb ch9 stuff) */
- if (irq_src & UDC_DS_CHG) {
- devstate_irq(_udc, irq_src);
- status = IRQ_HANDLED;
- irq_src &= ~UDC_DS_CHG;
- }
-
- /* EP0 control transfers */
- if (irq_src & (UDC_EP0_RX|UDC_SETUP|UDC_EP0_TX)) {
- ep0_irq(_udc, irq_src);
- status = IRQ_HANDLED;
- irq_src &= ~(UDC_EP0_RX|UDC_SETUP|UDC_EP0_TX);
- }
-
- /* DMA transfer completion */
- if (use_dma && (irq_src & (UDC_TXN_DONE|UDC_RXN_CNT|UDC_RXN_EOT))) {
- dma_irq(_udc, irq_src);
- status = IRQ_HANDLED;
- irq_src &= ~(UDC_TXN_DONE|UDC_RXN_CNT|UDC_RXN_EOT);
- }
-
- irq_src &= ~(UDC_IRQ_SOF | UDC_EPN_TX|UDC_EPN_RX);
- if (irq_src)
- DBG("udc_irq, unhandled %03x\n", irq_src);
- spin_unlock_irqrestore(&udc->lock, flags);
-
- return status;
-}
-
-/* workaround for seemingly-lost IRQs for RX ACKs... */
-#define PIO_OUT_TIMEOUT (jiffies + HZ/3)
-#define HALF_FULL(f) (!((f)&(UDC_NON_ISO_FIFO_FULL|UDC_NON_ISO_FIFO_EMPTY)))
-
-static void pio_out_timer(struct timer_list *t)
-{
- struct omap_ep *ep = from_timer(ep, t, timer);
- unsigned long flags;
- u16 stat_flg;
-
- spin_lock_irqsave(&ep->udc->lock, flags);
- if (!list_empty(&ep->queue) && ep->ackwait) {
- use_ep(ep, UDC_EP_SEL);
- stat_flg = omap_readw(UDC_STAT_FLG);
-
- if ((stat_flg & UDC_ACK) && (!(stat_flg & UDC_FIFO_EN)
- || (ep->double_buf && HALF_FULL(stat_flg)))) {
- struct omap_req *req;
-
- VDBG("%s: lose, %04x\n", ep->ep.name, stat_flg);
- req = container_of(ep->queue.next,
- struct omap_req, queue);
- (void) read_fifo(ep, req);
- omap_writew(ep->bEndpointAddress, UDC_EP_NUM);
- omap_writew(UDC_SET_FIFO_EN, UDC_CTRL);
- ep->ackwait = 1 + ep->double_buf;
- } else
- deselect_ep();
- }
- mod_timer(&ep->timer, PIO_OUT_TIMEOUT);
- spin_unlock_irqrestore(&ep->udc->lock, flags);
-}
-
-static irqreturn_t omap_udc_pio_irq(int irq, void *_dev)
-{
- u16 epn_stat, irq_src;
- irqreturn_t status = IRQ_NONE;
- struct omap_ep *ep;
- int epnum;
- struct omap_udc *udc = _dev;
- struct omap_req *req;
- unsigned long flags;
-
- spin_lock_irqsave(&udc->lock, flags);
- epn_stat = omap_readw(UDC_EPN_STAT);
- irq_src = omap_readw(UDC_IRQ_SRC);
-
- /* handle OUT first, to avoid some wasteful NAKs */
- if (irq_src & UDC_EPN_RX) {
- epnum = (epn_stat >> 8) & 0x0f;
- omap_writew(UDC_EPN_RX, UDC_IRQ_SRC);
- status = IRQ_HANDLED;
- ep = &udc->ep[epnum];
- ep->irqs++;
-
- omap_writew(epnum | UDC_EP_SEL, UDC_EP_NUM);
- ep->fnf = 0;
- if (omap_readw(UDC_STAT_FLG) & UDC_ACK) {
- ep->ackwait--;
- if (!list_empty(&ep->queue)) {
- int stat;
- req = container_of(ep->queue.next,
- struct omap_req, queue);
- stat = read_fifo(ep, req);
- if (!ep->double_buf)
- ep->fnf = 1;
- }
- }
- /* min 6 clock delay before clearing EP_SEL ... */
- epn_stat = omap_readw(UDC_EPN_STAT);
- epn_stat = omap_readw(UDC_EPN_STAT);
- omap_writew(epnum, UDC_EP_NUM);
-
- /* enabling fifo _after_ clearing ACK, contrary to docs,
- * reduces lossage; timer still needed though (sigh).
- */
- if (ep->fnf) {
- omap_writew(UDC_SET_FIFO_EN, UDC_CTRL);
- ep->ackwait = 1 + ep->double_buf;
- }
- mod_timer(&ep->timer, PIO_OUT_TIMEOUT);
- }
-
- /* then IN transfers */
- else if (irq_src & UDC_EPN_TX) {
- epnum = epn_stat & 0x0f;
- omap_writew(UDC_EPN_TX, UDC_IRQ_SRC);
- status = IRQ_HANDLED;
- ep = &udc->ep[16 + epnum];
- ep->irqs++;
-
- omap_writew(epnum | UDC_EP_DIR | UDC_EP_SEL, UDC_EP_NUM);
- if (omap_readw(UDC_STAT_FLG) & UDC_ACK) {
- ep->ackwait = 0;
- if (!list_empty(&ep->queue)) {
- req = container_of(ep->queue.next,
- struct omap_req, queue);
- (void) write_fifo(ep, req);
- }
- }
- /* min 6 clock delay before clearing EP_SEL ... */
- epn_stat = omap_readw(UDC_EPN_STAT);
- epn_stat = omap_readw(UDC_EPN_STAT);
- omap_writew(epnum | UDC_EP_DIR, UDC_EP_NUM);
- /* then 6 clocks before it'd tx */
- }
-
- spin_unlock_irqrestore(&udc->lock, flags);
- return status;
-}
-
-#ifdef USE_ISO
-static irqreturn_t omap_udc_iso_irq(int irq, void *_dev)
-{
- struct omap_udc *udc = _dev;
- struct omap_ep *ep;
- int pending = 0;
- unsigned long flags;
-
- spin_lock_irqsave(&udc->lock, flags);
-
- /* handle all non-DMA ISO transfers */
- list_for_each_entry(ep, &udc->iso, iso) {
- u16 stat;
- struct omap_req *req;
-
- if (ep->has_dma || list_empty(&ep->queue))
- continue;
- req = list_entry(ep->queue.next, struct omap_req, queue);
-
- use_ep(ep, UDC_EP_SEL);
- stat = omap_readw(UDC_STAT_FLG);
-
- /* NOTE: like the other controller drivers, this isn't
- * currently reporting lost or damaged frames.
- */
- if (ep->bEndpointAddress & USB_DIR_IN) {
- if (stat & UDC_MISS_IN)
- /* done(ep, req, -EPROTO) */;
- else
- write_fifo(ep, req);
- } else {
- int status = 0;
-
- if (stat & UDC_NO_RXPACKET)
- status = -EREMOTEIO;
- else if (stat & UDC_ISO_ERR)
- status = -EILSEQ;
- else if (stat & UDC_DATA_FLUSH)
- status = -ENOSR;
-
- if (status)
- /* done(ep, req, status) */;
- else
- read_fifo(ep, req);
- }
- deselect_ep();
- /* 6 wait states before next EP */
-
- ep->irqs++;
- if (!list_empty(&ep->queue))
- pending = 1;
- }
- if (!pending) {
- u16 w;
-
- w = omap_readw(UDC_IRQ_EN);
- w &= ~UDC_SOF_IE;
- omap_writew(w, UDC_IRQ_EN);
- }
- omap_writew(UDC_IRQ_SOF, UDC_IRQ_SRC);
-
- spin_unlock_irqrestore(&udc->lock, flags);
- return IRQ_HANDLED;
-}
-#endif
-
-/*-------------------------------------------------------------------------*/
-
-static inline int machine_without_vbus_sense(void)
-{
- return machine_is_omap_osk() || machine_is_sx1();
-}
-
-static int omap_udc_start(struct usb_gadget *g,
- struct usb_gadget_driver *driver)
-{
- int status;
- struct omap_ep *ep;
- unsigned long flags;
-
-
- spin_lock_irqsave(&udc->lock, flags);
- /* reset state */
- list_for_each_entry(ep, &udc->gadget.ep_list, ep.ep_list) {
- ep->irqs = 0;
- if (ep->bmAttributes == USB_ENDPOINT_XFER_ISOC)
- continue;
- use_ep(ep, 0);
- omap_writew(UDC_SET_HALT, UDC_CTRL);
- }
- udc->ep0_pending = 0;
- udc->ep[0].irqs = 0;
- udc->softconnect = 1;
-
- /* hook up the driver */
- driver->driver.bus = NULL;
- udc->driver = driver;
- spin_unlock_irqrestore(&udc->lock, flags);
-
- if (udc->dc_clk != NULL)
- omap_udc_enable_clock(1);
-
- omap_writew(UDC_IRQ_SRC_MASK, UDC_IRQ_SRC);
-
- /* connect to bus through transceiver */
- if (!IS_ERR_OR_NULL(udc->transceiver)) {
- status = otg_set_peripheral(udc->transceiver->otg,
- &udc->gadget);
- if (status < 0) {
- ERR("can't bind to transceiver\n");
- udc->driver = NULL;
- goto done;
- }
- } else {
- status = 0;
- if (can_pullup(udc))
- pullup_enable(udc);
- else
- pullup_disable(udc);
- }
-
- /* boards that don't have VBUS sensing can't autogate 48MHz;
- * can't enter deep sleep while a gadget driver is active.
- */
- if (machine_without_vbus_sense())
- omap_vbus_session(&udc->gadget, 1);
-
-done:
- if (udc->dc_clk != NULL)
- omap_udc_enable_clock(0);
-
- return status;
-}
-
-static int omap_udc_stop(struct usb_gadget *g)
-{
- unsigned long flags;
-
- if (udc->dc_clk != NULL)
- omap_udc_enable_clock(1);
-
- if (machine_without_vbus_sense())
- omap_vbus_session(&udc->gadget, 0);
-
- if (!IS_ERR_OR_NULL(udc->transceiver))
- (void) otg_set_peripheral(udc->transceiver->otg, NULL);
- else
- pullup_disable(udc);
-
- spin_lock_irqsave(&udc->lock, flags);
- udc_quiesce(udc);
- spin_unlock_irqrestore(&udc->lock, flags);
-
- udc->driver = NULL;
-
- if (udc->dc_clk != NULL)
- omap_udc_enable_clock(0);
-
- return 0;
-}
-
-/*-------------------------------------------------------------------------*/
-
-#ifdef CONFIG_USB_GADGET_DEBUG_FILES
-
-#include <linux/seq_file.h>
-
-static const char proc_filename[] = "driver/udc";
-
-#define FOURBITS "%s%s%s%s"
-#define EIGHTBITS "%s%s%s%s%s%s%s%s"
-
-static void proc_ep_show(struct seq_file *s, struct omap_ep *ep)
-{
- u16 stat_flg;
- struct omap_req *req;
- char buf[20];
-
- use_ep(ep, 0);
-
- if (use_dma && ep->has_dma)
- snprintf(buf, sizeof buf, "(%cxdma%d lch%d) ",
- (ep->bEndpointAddress & USB_DIR_IN) ? 't' : 'r',
- ep->dma_channel - 1, ep->lch);
- else
- buf[0] = 0;
-
- stat_flg = omap_readw(UDC_STAT_FLG);
- seq_printf(s,
- "\n%s %s%s%sirqs %ld stat %04x " EIGHTBITS FOURBITS "%s\n",
- ep->name, buf,
- ep->double_buf ? "dbuf " : "",
- ({ char *s;
- switch (ep->ackwait) {
- case 0:
- s = "";
- break;
- case 1:
- s = "(ackw) ";
- break;
- case 2:
- s = "(ackw2) ";
- break;
- default:
- s = "(?) ";
- break;
- } s; }),
- ep->irqs, stat_flg,
- (stat_flg & UDC_NO_RXPACKET) ? "no_rxpacket " : "",
- (stat_flg & UDC_MISS_IN) ? "miss_in " : "",
- (stat_flg & UDC_DATA_FLUSH) ? "data_flush " : "",
- (stat_flg & UDC_ISO_ERR) ? "iso_err " : "",
- (stat_flg & UDC_ISO_FIFO_EMPTY) ? "iso_fifo_empty " : "",
- (stat_flg & UDC_ISO_FIFO_FULL) ? "iso_fifo_full " : "",
- (stat_flg & UDC_EP_HALTED) ? "HALT " : "",
- (stat_flg & UDC_STALL) ? "STALL " : "",
- (stat_flg & UDC_NAK) ? "NAK " : "",
- (stat_flg & UDC_ACK) ? "ACK " : "",
- (stat_flg & UDC_FIFO_EN) ? "fifo_en " : "",
- (stat_flg & UDC_NON_ISO_FIFO_EMPTY) ? "fifo_empty " : "",
- (stat_flg & UDC_NON_ISO_FIFO_FULL) ? "fifo_full " : "");
-
- if (list_empty(&ep->queue))
- seq_printf(s, "\t(queue empty)\n");
- else
- list_for_each_entry(req, &ep->queue, queue) {
- unsigned length = req->req.actual;
-
- if (use_dma && buf[0]) {
- length += ((ep->bEndpointAddress & USB_DIR_IN)
- ? dma_src_len : dma_dest_len)
- (ep, req->req.dma + length);
- buf[0] = 0;
- }
- seq_printf(s, "\treq %p len %d/%d buf %p\n",
- &req->req, length,
- req->req.length, req->req.buf);
- }
-}
-
-static char *trx_mode(unsigned m, int enabled)
-{
- switch (m) {
- case 0:
- return enabled ? "*6wire" : "unused";
- case 1:
- return "4wire";
- case 2:
- return "3wire";
- case 3:
- return "6wire";
- default:
- return "unknown";
- }
-}
-
-static int proc_otg_show(struct seq_file *s)
-{
- u32 tmp;
- u32 trans = 0;
- char *ctrl_name = "(UNKNOWN)";
-
- tmp = omap_readl(OTG_REV);
- ctrl_name = "transceiver_ctrl";
- trans = omap_readw(USB_TRANSCEIVER_CTRL);
- seq_printf(s, "\nOTG rev %d.%d, %s %05x\n",
- tmp >> 4, tmp & 0xf, ctrl_name, trans);
- tmp = omap_readw(OTG_SYSCON_1);
- seq_printf(s, "otg_syscon1 %08x usb2 %s, usb1 %s, usb0 %s,"
- FOURBITS "\n", tmp,
- trx_mode(USB2_TRX_MODE(tmp), trans & CONF_USB2_UNI_R),
- trx_mode(USB1_TRX_MODE(tmp), trans & CONF_USB1_UNI_R),
- (USB0_TRX_MODE(tmp) == 0 && !cpu_is_omap1710())
- ? "internal"
- : trx_mode(USB0_TRX_MODE(tmp), 1),
- (tmp & OTG_IDLE_EN) ? " !otg" : "",
- (tmp & HST_IDLE_EN) ? " !host" : "",
- (tmp & DEV_IDLE_EN) ? " !dev" : "",
- (tmp & OTG_RESET_DONE) ? " reset_done" : " reset_active");
- tmp = omap_readl(OTG_SYSCON_2);
- seq_printf(s, "otg_syscon2 %08x%s" EIGHTBITS
- " b_ase_brst=%d hmc=%d\n", tmp,
- (tmp & OTG_EN) ? " otg_en" : "",
- (tmp & USBX_SYNCHRO) ? " synchro" : "",
- /* much more SRP stuff */
- (tmp & SRP_DATA) ? " srp_data" : "",
- (tmp & SRP_VBUS) ? " srp_vbus" : "",
- (tmp & OTG_PADEN) ? " otg_paden" : "",
- (tmp & HMC_PADEN) ? " hmc_paden" : "",
- (tmp & UHOST_EN) ? " uhost_en" : "",
- (tmp & HMC_TLLSPEED) ? " tllspeed" : "",
- (tmp & HMC_TLLATTACH) ? " tllattach" : "",
- B_ASE_BRST(tmp),
- OTG_HMC(tmp));
- tmp = omap_readl(OTG_CTRL);
- seq_printf(s, "otg_ctrl %06x" EIGHTBITS EIGHTBITS "%s\n", tmp,
- (tmp & OTG_ASESSVLD) ? " asess" : "",
- (tmp & OTG_BSESSEND) ? " bsess_end" : "",
- (tmp & OTG_BSESSVLD) ? " bsess" : "",
- (tmp & OTG_VBUSVLD) ? " vbus" : "",
- (tmp & OTG_ID) ? " id" : "",
- (tmp & OTG_DRIVER_SEL) ? " DEVICE" : " HOST",
- (tmp & OTG_A_SETB_HNPEN) ? " a_setb_hnpen" : "",
- (tmp & OTG_A_BUSREQ) ? " a_bus" : "",
- (tmp & OTG_B_HNPEN) ? " b_hnpen" : "",
- (tmp & OTG_B_BUSREQ) ? " b_bus" : "",
- (tmp & OTG_BUSDROP) ? " busdrop" : "",
- (tmp & OTG_PULLDOWN) ? " down" : "",
- (tmp & OTG_PULLUP) ? " up" : "",
- (tmp & OTG_DRV_VBUS) ? " drv" : "",
- (tmp & OTG_PD_VBUS) ? " pd_vb" : "",
- (tmp & OTG_PU_VBUS) ? " pu_vb" : "",
- (tmp & OTG_PU_ID) ? " pu_id" : ""
- );
- tmp = omap_readw(OTG_IRQ_EN);
- seq_printf(s, "otg_irq_en %04x" "\n", tmp);
- tmp = omap_readw(OTG_IRQ_SRC);
- seq_printf(s, "otg_irq_src %04x" "\n", tmp);
- tmp = omap_readw(OTG_OUTCTRL);
- seq_printf(s, "otg_outctrl %04x" "\n", tmp);
- tmp = omap_readw(OTG_TEST);
- seq_printf(s, "otg_test %04x" "\n", tmp);
- return 0;
-}
-
-static int proc_udc_show(struct seq_file *s, void *_)
-{
- u32 tmp;
- struct omap_ep *ep;
- unsigned long flags;
-
- spin_lock_irqsave(&udc->lock, flags);
-
- seq_printf(s, "%s, version: " DRIVER_VERSION
-#ifdef USE_ISO
- " (iso)"
-#endif
- "%s\n",
- driver_desc,
- use_dma ? " (dma)" : "");
-
- tmp = omap_readw(UDC_REV) & 0xff;
- seq_printf(s,
- "UDC rev %d.%d, fifo mode %d, gadget %s\n"
- "hmc %d, transceiver %s\n",
- tmp >> 4, tmp & 0xf,
- fifo_mode,
- udc->driver ? udc->driver->driver.name : "(none)",
- HMC,
- udc->transceiver
- ? udc->transceiver->label
- : (cpu_is_omap1710()
- ? "external" : "(none)"));
- seq_printf(s, "ULPD control %04x req %04x status %04x\n",
- omap_readw(ULPD_CLOCK_CTRL),
- omap_readw(ULPD_SOFT_REQ),
- omap_readw(ULPD_STATUS_REQ));
-
- /* OTG controller registers */
- if (!cpu_is_omap15xx())
- proc_otg_show(s);
-
- tmp = omap_readw(UDC_SYSCON1);
- seq_printf(s, "\nsyscon1 %04x" EIGHTBITS "\n", tmp,
- (tmp & UDC_CFG_LOCK) ? " cfg_lock" : "",
- (tmp & UDC_DATA_ENDIAN) ? " data_endian" : "",
- (tmp & UDC_DMA_ENDIAN) ? " dma_endian" : "",
- (tmp & UDC_NAK_EN) ? " nak" : "",
- (tmp & UDC_AUTODECODE_DIS) ? " autodecode_dis" : "",
- (tmp & UDC_SELF_PWR) ? " self_pwr" : "",
- (tmp & UDC_SOFF_DIS) ? " soff_dis" : "",
- (tmp & UDC_PULLUP_EN) ? " PULLUP" : "");
- /* syscon2 is write-only */
-
- /* UDC controller registers */
- if (!(tmp & UDC_PULLUP_EN)) {
- seq_printf(s, "(suspended)\n");
- spin_unlock_irqrestore(&udc->lock, flags);
- return 0;
- }
-
- tmp = omap_readw(UDC_DEVSTAT);
- seq_printf(s, "devstat %04x" EIGHTBITS "%s%s\n", tmp,
- (tmp & UDC_B_HNP_ENABLE) ? " b_hnp" : "",
- (tmp & UDC_A_HNP_SUPPORT) ? " a_hnp" : "",
- (tmp & UDC_A_ALT_HNP_SUPPORT) ? " a_alt_hnp" : "",
- (tmp & UDC_R_WK_OK) ? " r_wk_ok" : "",
- (tmp & UDC_USB_RESET) ? " usb_reset" : "",
- (tmp & UDC_SUS) ? " SUS" : "",
- (tmp & UDC_CFG) ? " CFG" : "",
- (tmp & UDC_ADD) ? " ADD" : "",
- (tmp & UDC_DEF) ? " DEF" : "",
- (tmp & UDC_ATT) ? " ATT" : "");
- seq_printf(s, "sof %04x\n", omap_readw(UDC_SOF));
- tmp = omap_readw(UDC_IRQ_EN);
- seq_printf(s, "irq_en %04x" FOURBITS "%s\n", tmp,
- (tmp & UDC_SOF_IE) ? " sof" : "",
- (tmp & UDC_EPN_RX_IE) ? " epn_rx" : "",
- (tmp & UDC_EPN_TX_IE) ? " epn_tx" : "",
- (tmp & UDC_DS_CHG_IE) ? " ds_chg" : "",
- (tmp & UDC_EP0_IE) ? " ep0" : "");
- tmp = omap_readw(UDC_IRQ_SRC);
- seq_printf(s, "irq_src %04x" EIGHTBITS "%s%s\n", tmp,
- (tmp & UDC_TXN_DONE) ? " txn_done" : "",
- (tmp & UDC_RXN_CNT) ? " rxn_cnt" : "",
- (tmp & UDC_RXN_EOT) ? " rxn_eot" : "",
- (tmp & UDC_IRQ_SOF) ? " sof" : "",
- (tmp & UDC_EPN_RX) ? " epn_rx" : "",
- (tmp & UDC_EPN_TX) ? " epn_tx" : "",
- (tmp & UDC_DS_CHG) ? " ds_chg" : "",
- (tmp & UDC_SETUP) ? " setup" : "",
- (tmp & UDC_EP0_RX) ? " ep0out" : "",
- (tmp & UDC_EP0_TX) ? " ep0in" : "");
- if (use_dma) {
- unsigned i;
-
- tmp = omap_readw(UDC_DMA_IRQ_EN);
- seq_printf(s, "dma_irq_en %04x%s" EIGHTBITS "\n", tmp,
- (tmp & UDC_TX_DONE_IE(3)) ? " tx2_done" : "",
- (tmp & UDC_RX_CNT_IE(3)) ? " rx2_cnt" : "",
- (tmp & UDC_RX_EOT_IE(3)) ? " rx2_eot" : "",
-
- (tmp & UDC_TX_DONE_IE(2)) ? " tx1_done" : "",
- (tmp & UDC_RX_CNT_IE(2)) ? " rx1_cnt" : "",
- (tmp & UDC_RX_EOT_IE(2)) ? " rx1_eot" : "",
-
- (tmp & UDC_TX_DONE_IE(1)) ? " tx0_done" : "",
- (tmp & UDC_RX_CNT_IE(1)) ? " rx0_cnt" : "",
- (tmp & UDC_RX_EOT_IE(1)) ? " rx0_eot" : "");
-
- tmp = omap_readw(UDC_RXDMA_CFG);
- seq_printf(s, "rxdma_cfg %04x\n", tmp);
- if (tmp) {
- for (i = 0; i < 3; i++) {
- if ((tmp & (0x0f << (i * 4))) == 0)
- continue;
- seq_printf(s, "rxdma[%d] %04x\n", i,
- omap_readw(UDC_RXDMA(i + 1)));
- }
- }
- tmp = omap_readw(UDC_TXDMA_CFG);
- seq_printf(s, "txdma_cfg %04x\n", tmp);
- if (tmp) {
- for (i = 0; i < 3; i++) {
- if (!(tmp & (0x0f << (i * 4))))
- continue;
- seq_printf(s, "txdma[%d] %04x\n", i,
- omap_readw(UDC_TXDMA(i + 1)));
- }
- }
- }
-
- tmp = omap_readw(UDC_DEVSTAT);
- if (tmp & UDC_ATT) {
- proc_ep_show(s, &udc->ep[0]);
- if (tmp & UDC_ADD) {
- list_for_each_entry(ep, &udc->gadget.ep_list,
- ep.ep_list) {
- if (ep->ep.desc)
- proc_ep_show(s, ep);
- }
- }
- }
- spin_unlock_irqrestore(&udc->lock, flags);
- return 0;
-}
-
-static void create_proc_file(void)
-{
- proc_create_single(proc_filename, 0, NULL, proc_udc_show);
-}
-
-static void remove_proc_file(void)
-{
- remove_proc_entry(proc_filename, NULL);
-}
-
-#else
-
-static inline void create_proc_file(void) {}
-static inline void remove_proc_file(void) {}
-
-#endif
-
-/*-------------------------------------------------------------------------*/
-
-/* Before this controller can enumerate, we need to pick an endpoint
- * configuration, or "fifo_mode" That involves allocating 2KB of packet
- * buffer space among the endpoints we'll be operating.
- *
- * NOTE: as of OMAP 1710 ES2.0, writing a new endpoint config when
- * UDC_SYSCON_1.CFG_LOCK is set can now work. We won't use that
- * capability yet though.
- */
-static unsigned
-omap_ep_setup(char *name, u8 addr, u8 type,
- unsigned buf, unsigned maxp, int dbuf)
-{
- struct omap_ep *ep;
- u16 epn_rxtx = 0;
-
- /* OUT endpoints first, then IN */
- ep = &udc->ep[addr & 0xf];
- if (addr & USB_DIR_IN)
- ep += 16;
-
- /* in case of ep init table bugs */
- BUG_ON(ep->name[0]);
-
- /* chip setup ... bit values are same for IN, OUT */
- if (type == USB_ENDPOINT_XFER_ISOC) {
- switch (maxp) {
- case 8:
- epn_rxtx = 0 << 12;
- break;
- case 16:
- epn_rxtx = 1 << 12;
- break;
- case 32:
- epn_rxtx = 2 << 12;
- break;
- case 64:
- epn_rxtx = 3 << 12;
- break;
- case 128:
- epn_rxtx = 4 << 12;
- break;
- case 256:
- epn_rxtx = 5 << 12;
- break;
- case 512:
- epn_rxtx = 6 << 12;
- break;
- default:
- BUG();
- }
- epn_rxtx |= UDC_EPN_RX_ISO;
- dbuf = 1;
- } else {
- /* double-buffering "not supported" on 15xx,
- * and ignored for PIO-IN on newer chips
- * (for more reliable behavior)
- */
- if (!use_dma || cpu_is_omap15xx())
- dbuf = 0;
-
- switch (maxp) {
- case 8:
- epn_rxtx = 0 << 12;
- break;
- case 16:
- epn_rxtx = 1 << 12;
- break;
- case 32:
- epn_rxtx = 2 << 12;
- break;
- case 64:
- epn_rxtx = 3 << 12;
- break;
- default:
- BUG();
- }
- if (dbuf && addr)
- epn_rxtx |= UDC_EPN_RX_DB;
- timer_setup(&ep->timer, pio_out_timer, 0);
- }
- if (addr)
- epn_rxtx |= UDC_EPN_RX_VALID;
- BUG_ON(buf & 0x07);
- epn_rxtx |= buf >> 3;
-
- DBG("%s addr %02x rxtx %04x maxp %d%s buf %d\n",
- name, addr, epn_rxtx, maxp, dbuf ? "x2" : "", buf);
-
- if (addr & USB_DIR_IN)
- omap_writew(epn_rxtx, UDC_EP_TX(addr & 0xf));
- else
- omap_writew(epn_rxtx, UDC_EP_RX(addr));
-
- /* next endpoint's buffer starts after this one's */
- buf += maxp;
- if (dbuf)
- buf += maxp;
- BUG_ON(buf > 2048);
-
- /* set up driver data structures */
- BUG_ON(strlen(name) >= sizeof ep->name);
- strscpy(ep->name, name, sizeof(ep->name));
- INIT_LIST_HEAD(&ep->queue);
- INIT_LIST_HEAD(&ep->iso);
- ep->bEndpointAddress = addr;
- ep->bmAttributes = type;
- ep->double_buf = dbuf;
- ep->udc = udc;
-
- switch (type) {
- case USB_ENDPOINT_XFER_CONTROL:
- ep->ep.caps.type_control = true;
- ep->ep.caps.dir_in = true;
- ep->ep.caps.dir_out = true;
- break;
- case USB_ENDPOINT_XFER_ISOC:
- ep->ep.caps.type_iso = true;
- break;
- case USB_ENDPOINT_XFER_BULK:
- ep->ep.caps.type_bulk = true;
- break;
- case USB_ENDPOINT_XFER_INT:
- ep->ep.caps.type_int = true;
- break;
- }
-
- if (addr & USB_DIR_IN)
- ep->ep.caps.dir_in = true;
- else
- ep->ep.caps.dir_out = true;
-
- ep->ep.name = ep->name;
- ep->ep.ops = &omap_ep_ops;
- ep->maxpacket = maxp;
- usb_ep_set_maxpacket_limit(&ep->ep, ep->maxpacket);
- list_add_tail(&ep->ep.ep_list, &udc->gadget.ep_list);
-
- return buf;
-}
-
-static void omap_udc_release(struct device *dev)
-{
- pullup_disable(udc);
- if (!IS_ERR_OR_NULL(udc->transceiver)) {
- usb_put_phy(udc->transceiver);
- udc->transceiver = NULL;
- }
- omap_writew(0, UDC_SYSCON1);
- remove_proc_file();
- if (udc->dc_clk) {
- if (udc->clk_requested)
- omap_udc_enable_clock(0);
- clk_unprepare(udc->hhc_clk);
- clk_unprepare(udc->dc_clk);
- clk_put(udc->hhc_clk);
- clk_put(udc->dc_clk);
- }
- if (udc->done)
- complete(udc->done);
- kfree(udc);
-}
-
-static int
-omap_udc_setup(struct platform_device *odev, struct usb_phy *xceiv)
-{
- unsigned tmp, buf;
-
- /* abolish any previous hardware state */
- omap_writew(0, UDC_SYSCON1);
- omap_writew(0, UDC_IRQ_EN);
- omap_writew(UDC_IRQ_SRC_MASK, UDC_IRQ_SRC);
- omap_writew(0, UDC_DMA_IRQ_EN);
- omap_writew(0, UDC_RXDMA_CFG);
- omap_writew(0, UDC_TXDMA_CFG);
-
- /* UDC_PULLUP_EN gates the chip clock */
- /* OTG_SYSCON_1 |= DEV_IDLE_EN; */
-
- udc = kzalloc(sizeof(*udc), GFP_KERNEL);
- if (!udc)
- return -ENOMEM;
-
- spin_lock_init(&udc->lock);
-
- udc->gadget.ops = &omap_gadget_ops;
- udc->gadget.ep0 = &udc->ep[0].ep;
- INIT_LIST_HEAD(&udc->gadget.ep_list);
- INIT_LIST_HEAD(&udc->iso);
- udc->gadget.speed = USB_SPEED_UNKNOWN;
- udc->gadget.max_speed = USB_SPEED_FULL;
- udc->gadget.name = driver_name;
- udc->gadget.quirk_ep_out_aligned_size = 1;
- udc->transceiver = xceiv;
-
- /* ep0 is special; put it right after the SETUP buffer */
- buf = omap_ep_setup("ep0", 0, USB_ENDPOINT_XFER_CONTROL,
- 8 /* after SETUP */, 64 /* maxpacket */, 0);
- list_del_init(&udc->ep[0].ep.ep_list);
-
- /* initially disable all non-ep0 endpoints */
- for (tmp = 1; tmp < 15; tmp++) {
- omap_writew(0, UDC_EP_RX(tmp));
- omap_writew(0, UDC_EP_TX(tmp));
- }
-
-#define OMAP_BULK_EP(name, addr) \
- buf = omap_ep_setup(name "-bulk", addr, \
- USB_ENDPOINT_XFER_BULK, buf, 64, 1);
-#define OMAP_INT_EP(name, addr, maxp) \
- buf = omap_ep_setup(name "-int", addr, \
- USB_ENDPOINT_XFER_INT, buf, maxp, 0);
-#define OMAP_ISO_EP(name, addr, maxp) \
- buf = omap_ep_setup(name "-iso", addr, \
- USB_ENDPOINT_XFER_ISOC, buf, maxp, 1);
-
- switch (fifo_mode) {
- case 0:
- OMAP_BULK_EP("ep1in", USB_DIR_IN | 1);
- OMAP_BULK_EP("ep2out", USB_DIR_OUT | 2);
- OMAP_INT_EP("ep3in", USB_DIR_IN | 3, 16);
- break;
- case 1:
- OMAP_BULK_EP("ep1in", USB_DIR_IN | 1);
- OMAP_BULK_EP("ep2out", USB_DIR_OUT | 2);
- OMAP_INT_EP("ep9in", USB_DIR_IN | 9, 16);
-
- OMAP_BULK_EP("ep3in", USB_DIR_IN | 3);
- OMAP_BULK_EP("ep4out", USB_DIR_OUT | 4);
- OMAP_INT_EP("ep10in", USB_DIR_IN | 10, 16);
-
- OMAP_BULK_EP("ep5in", USB_DIR_IN | 5);
- OMAP_BULK_EP("ep5out", USB_DIR_OUT | 5);
- OMAP_INT_EP("ep11in", USB_DIR_IN | 11, 16);
-
- OMAP_BULK_EP("ep6in", USB_DIR_IN | 6);
- OMAP_BULK_EP("ep6out", USB_DIR_OUT | 6);
- OMAP_INT_EP("ep12in", USB_DIR_IN | 12, 16);
-
- OMAP_BULK_EP("ep7in", USB_DIR_IN | 7);
- OMAP_BULK_EP("ep7out", USB_DIR_OUT | 7);
- OMAP_INT_EP("ep13in", USB_DIR_IN | 13, 16);
- OMAP_INT_EP("ep13out", USB_DIR_OUT | 13, 16);
-
- OMAP_BULK_EP("ep8in", USB_DIR_IN | 8);
- OMAP_BULK_EP("ep8out", USB_DIR_OUT | 8);
- OMAP_INT_EP("ep14in", USB_DIR_IN | 14, 16);
- OMAP_INT_EP("ep14out", USB_DIR_OUT | 14, 16);
-
- OMAP_BULK_EP("ep15in", USB_DIR_IN | 15);
- OMAP_BULK_EP("ep15out", USB_DIR_OUT | 15);
-
- break;
-
-#ifdef USE_ISO
- case 2: /* mixed iso/bulk */
- OMAP_ISO_EP("ep1in", USB_DIR_IN | 1, 256);
- OMAP_ISO_EP("ep2out", USB_DIR_OUT | 2, 256);
- OMAP_ISO_EP("ep3in", USB_DIR_IN | 3, 128);
- OMAP_ISO_EP("ep4out", USB_DIR_OUT | 4, 128);
-
- OMAP_INT_EP("ep5in", USB_DIR_IN | 5, 16);
-
- OMAP_BULK_EP("ep6in", USB_DIR_IN | 6);
- OMAP_BULK_EP("ep7out", USB_DIR_OUT | 7);
- OMAP_INT_EP("ep8in", USB_DIR_IN | 8, 16);
- break;
- case 3: /* mixed bulk/iso */
- OMAP_BULK_EP("ep1in", USB_DIR_IN | 1);
- OMAP_BULK_EP("ep2out", USB_DIR_OUT | 2);
- OMAP_INT_EP("ep3in", USB_DIR_IN | 3, 16);
-
- OMAP_BULK_EP("ep4in", USB_DIR_IN | 4);
- OMAP_BULK_EP("ep5out", USB_DIR_OUT | 5);
- OMAP_INT_EP("ep6in", USB_DIR_IN | 6, 16);
-
- OMAP_ISO_EP("ep7in", USB_DIR_IN | 7, 256);
- OMAP_ISO_EP("ep8out", USB_DIR_OUT | 8, 256);
- OMAP_INT_EP("ep9in", USB_DIR_IN | 9, 16);
- break;
-#endif
-
- /* add more modes as needed */
-
- default:
- ERR("unsupported fifo_mode #%d\n", fifo_mode);
- return -ENODEV;
- }
- omap_writew(UDC_CFG_LOCK|UDC_SELF_PWR, UDC_SYSCON1);
- INFO("fifo mode %d, %d bytes not used\n", fifo_mode, 2048 - buf);
- return 0;
-}
-
-static int omap_udc_probe(struct platform_device *pdev)
-{
- int status = -ENODEV;
- int hmc;
- struct usb_phy *xceiv = NULL;
- const char *type = NULL;
- struct omap_usb_config *config = dev_get_platdata(&pdev->dev);
- struct clk *dc_clk = NULL;
- struct clk *hhc_clk = NULL;
-
- /* NOTE: "knows" the order of the resources! */
- if (!request_mem_region(pdev->resource[0].start,
- resource_size(&pdev->resource[0]),
- driver_name)) {
- DBG("request_mem_region failed\n");
- return -EBUSY;
- }
-
- if (cpu_is_omap16xx()) {
- dc_clk = clk_get(&pdev->dev, "usb_dc_ck");
- hhc_clk = clk_get(&pdev->dev, "usb_hhc_ck");
- BUG_ON(IS_ERR(dc_clk) || IS_ERR(hhc_clk));
- /* can't use omap_udc_enable_clock yet */
- clk_prepare_enable(dc_clk);
- clk_prepare_enable(hhc_clk);
- udelay(100);
- }
-
- INFO("OMAP UDC rev %d.%d%s\n",
- omap_readw(UDC_REV) >> 4, omap_readw(UDC_REV) & 0xf,
- config->otg ? ", Mini-AB" : "");
-
- /* use the mode given to us by board init code */
- if (cpu_is_omap15xx()) {
- hmc = HMC_1510;
- type = "(unknown)";
-
- if (machine_without_vbus_sense()) {
- /* just set up software VBUS detect, and then
- * later rig it so we always report VBUS.
- * FIXME without really sensing VBUS, we can't
- * know when to turn PULLUP_EN on/off; and that
- * means we always "need" the 48MHz clock.
- */
- u32 tmp = omap_readl(FUNC_MUX_CTRL_0);
- tmp &= ~VBUS_CTRL_1510;
- omap_writel(tmp, FUNC_MUX_CTRL_0);
- tmp |= VBUS_MODE_1510;
- tmp &= ~VBUS_CTRL_1510;
- omap_writel(tmp, FUNC_MUX_CTRL_0);
- }
- } else {
- /* The transceiver may package some GPIO logic or handle
- * loopback and/or transceiverless setup; if we find one,
- * use it. Except for OTG, we don't _need_ to talk to one;
- * but not having one probably means no VBUS detection.
- */
- xceiv = usb_get_phy(USB_PHY_TYPE_USB2);
- if (!IS_ERR_OR_NULL(xceiv))
- type = xceiv->label;
- else if (config->otg) {
- DBG("OTG requires external transceiver!\n");
- goto cleanup0;
- }
-
- hmc = HMC_1610;
-
- switch (hmc) {
- case 0: /* POWERUP DEFAULT == 0 */
- case 4:
- case 12:
- case 20:
- if (!cpu_is_omap1710()) {
- type = "integrated";
- break;
- }
- fallthrough;
- case 3:
- case 11:
- case 16:
- case 19:
- case 25:
- if (IS_ERR_OR_NULL(xceiv)) {
- DBG("external transceiver not registered!\n");
- type = "unknown";
- }
- break;
- case 21: /* internal loopback */
- type = "loopback";
- break;
- case 14: /* transceiverless */
- if (cpu_is_omap1710())
- goto bad_on_1710;
- fallthrough;
- case 13:
- case 15:
- type = "no";
- break;
-
- default:
-bad_on_1710:
- ERR("unrecognized UDC HMC mode %d\n", hmc);
- goto cleanup0;
- }
- }
-
- INFO("hmc mode %d, %s transceiver\n", hmc, type);
-
- /* a "gadget" abstracts/virtualizes the controller */
- status = omap_udc_setup(pdev, xceiv);
- if (status)
- goto cleanup0;
-
- xceiv = NULL;
- /* "udc" is now valid */
- pullup_disable(udc);
-#if IS_ENABLED(CONFIG_USB_OHCI_HCD)
- udc->gadget.is_otg = (config->otg != 0);
-#endif
-
- /* starting with omap1710 es2.0, clear toggle is a separate bit */
- if (omap_readw(UDC_REV) >= 0x61)
- udc->clr_halt = UDC_RESET_EP | UDC_CLRDATA_TOGGLE;
- else
- udc->clr_halt = UDC_RESET_EP;
-
- /* USB general purpose IRQ: ep0, state changes, dma, etc */
- status = devm_request_irq(&pdev->dev, pdev->resource[1].start,
- omap_udc_irq, 0, driver_name, udc);
- if (status != 0) {
- ERR("can't get irq %d, err %d\n",
- (int) pdev->resource[1].start, status);
- goto cleanup1;
- }
-
- /* USB "non-iso" IRQ (PIO for all but ep0) */
- status = devm_request_irq(&pdev->dev, pdev->resource[2].start,
- omap_udc_pio_irq, 0, "omap_udc pio", udc);
- if (status != 0) {
- ERR("can't get irq %d, err %d\n",
- (int) pdev->resource[2].start, status);
- goto cleanup1;
- }
-#ifdef USE_ISO
- status = devm_request_irq(&pdev->dev, pdev->resource[3].start,
- omap_udc_iso_irq, 0, "omap_udc iso", udc);
- if (status != 0) {
- ERR("can't get irq %d, err %d\n",
- (int) pdev->resource[3].start, status);
- goto cleanup1;
- }
-#endif
- if (cpu_is_omap16xx()) {
- udc->dc_clk = dc_clk;
- udc->hhc_clk = hhc_clk;
- clk_disable(hhc_clk);
- clk_disable(dc_clk);
- }
-
- create_proc_file();
- return usb_add_gadget_udc_release(&pdev->dev, &udc->gadget,
- omap_udc_release);
-
-cleanup1:
- kfree(udc);
- udc = NULL;
-
-cleanup0:
- if (!IS_ERR_OR_NULL(xceiv))
- usb_put_phy(xceiv);
-
- if (cpu_is_omap16xx()) {
- clk_disable_unprepare(hhc_clk);
- clk_disable_unprepare(dc_clk);
- clk_put(hhc_clk);
- clk_put(dc_clk);
- }
-
- release_mem_region(pdev->resource[0].start,
- resource_size(&pdev->resource[0]));
-
- return status;
-}
-
-static int omap_udc_remove(struct platform_device *pdev)
-{
- DECLARE_COMPLETION_ONSTACK(done);
-
- udc->done = &done;
-
- usb_del_gadget_udc(&udc->gadget);
-
- wait_for_completion(&done);
-
- release_mem_region(pdev->resource[0].start,
- resource_size(&pdev->resource[0]));
-
- return 0;
-}
-
-/* suspend/resume/wakeup from sysfs (echo > power/state) or when the
- * system is forced into deep sleep
- *
- * REVISIT we should probably reject suspend requests when there's a host
- * session active, rather than disconnecting, at least on boards that can
- * report VBUS irqs (UDC_DEVSTAT.UDC_ATT). And in any case, we need to
- * make host resumes and VBUS detection trigger OMAP wakeup events; that
- * may involve talking to an external transceiver (e.g. isp1301).
- */
-
-static int omap_udc_suspend(struct platform_device *dev, pm_message_t message)
-{
- u32 devstat;
-
- devstat = omap_readw(UDC_DEVSTAT);
-
- /* we're requesting 48 MHz clock if the pullup is enabled
- * (== we're attached to the host) and we're not suspended,
- * which would prevent entry to deep sleep...
- */
- if ((devstat & UDC_ATT) != 0 && (devstat & UDC_SUS) == 0) {
- WARNING("session active; suspend requires disconnect\n");
- omap_pullup(&udc->gadget, 0);
- }
-
- return 0;
-}
-
-static int omap_udc_resume(struct platform_device *dev)
-{
- DBG("resume + wakeup/SRP\n");
- omap_pullup(&udc->gadget, 1);
-
- /* maybe the host would enumerate us if we nudged it */
- msleep(100);
- return omap_wakeup(&udc->gadget);
-}
-
-/*-------------------------------------------------------------------------*/
-
-static struct platform_driver udc_driver = {
- .probe = omap_udc_probe,
- .remove = omap_udc_remove,
- .suspend = omap_udc_suspend,
- .resume = omap_udc_resume,
- .driver = {
- .name = driver_name,
- },
-};
-
-module_platform_driver(udc_driver);
-
-MODULE_DESCRIPTION(DRIVER_DESC);
-MODULE_LICENSE("GPL");
-MODULE_ALIAS("platform:omap_udc");
diff --git a/drivers/usb/gadget/udc/omap_udc.h b/drivers/usb/gadget/udc/omap_udc.h
deleted file mode 100644
index 00f9e608e755..000000000000
--- a/drivers/usb/gadget/udc/omap_udc.h
+++ /dev/null
@@ -1,207 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0 */
-/*
- * omap_udc.h -- for omap 3.2 udc, with OTG support
- *
- * 2004 (C) Texas Instruments, Inc.
- * 2004 (C) David Brownell
- */
-
-/*
- * USB device/endpoint management registers
- */
-
-#define UDC_REV (UDC_BASE + 0x0) /* Revision */
-#define UDC_EP_NUM (UDC_BASE + 0x4) /* Which endpoint */
-# define UDC_SETUP_SEL (1 << 6)
-# define UDC_EP_SEL (1 << 5)
-# define UDC_EP_DIR (1 << 4)
- /* low 4 bits for endpoint number */
-#define UDC_DATA (UDC_BASE + 0x08) /* Endpoint FIFO */
-#define UDC_CTRL (UDC_BASE + 0x0C) /* Endpoint control */
-# define UDC_CLR_HALT (1 << 7)
-# define UDC_SET_HALT (1 << 6)
-# define UDC_CLRDATA_TOGGLE (1 << 3)
-# define UDC_SET_FIFO_EN (1 << 2)
-# define UDC_CLR_EP (1 << 1)
-# define UDC_RESET_EP (1 << 0)
-#define UDC_STAT_FLG (UDC_BASE + 0x10) /* Endpoint status */
-# define UDC_NO_RXPACKET (1 << 15)
-# define UDC_MISS_IN (1 << 14)
-# define UDC_DATA_FLUSH (1 << 13)
-# define UDC_ISO_ERR (1 << 12)
-# define UDC_ISO_FIFO_EMPTY (1 << 9)
-# define UDC_ISO_FIFO_FULL (1 << 8)
-# define UDC_EP_HALTED (1 << 6)
-# define UDC_STALL (1 << 5)
-# define UDC_NAK (1 << 4)
-# define UDC_ACK (1 << 3)
-# define UDC_FIFO_EN (1 << 2)
-# define UDC_NON_ISO_FIFO_EMPTY (1 << 1)
-# define UDC_NON_ISO_FIFO_FULL (1 << 0)
-#define UDC_RXFSTAT (UDC_BASE + 0x14) /* OUT bytecount */
-#define UDC_SYSCON1 (UDC_BASE + 0x18) /* System config 1 */
-# define UDC_CFG_LOCK (1 << 8)
-# define UDC_DATA_ENDIAN (1 << 7)
-# define UDC_DMA_ENDIAN (1 << 6)
-# define UDC_NAK_EN (1 << 4)
-# define UDC_AUTODECODE_DIS (1 << 3)
-# define UDC_SELF_PWR (1 << 2)
-# define UDC_SOFF_DIS (1 << 1)
-# define UDC_PULLUP_EN (1 << 0)
-#define UDC_SYSCON2 (UDC_BASE + 0x1C) /* System config 2 */
-# define UDC_RMT_WKP (1 << 6)
-# define UDC_STALL_CMD (1 << 5)
-# define UDC_DEV_CFG (1 << 3)
-# define UDC_CLR_CFG (1 << 2)
-#define UDC_DEVSTAT (UDC_BASE + 0x20) /* Device status */
-# define UDC_B_HNP_ENABLE (1 << 9)
-# define UDC_A_HNP_SUPPORT (1 << 8)
-# define UDC_A_ALT_HNP_SUPPORT (1 << 7)
-# define UDC_R_WK_OK (1 << 6)
-# define UDC_USB_RESET (1 << 5)
-# define UDC_SUS (1 << 4)
-# define UDC_CFG (1 << 3)
-# define UDC_ADD (1 << 2)
-# define UDC_DEF (1 << 1)
-# define UDC_ATT (1 << 0)
-#define UDC_SOF (UDC_BASE + 0x24) /* Start of frame */
-# define UDC_FT_LOCK (1 << 12)
-# define UDC_TS_OK (1 << 11)
-# define UDC_TS 0x03ff
-#define UDC_IRQ_EN (UDC_BASE + 0x28) /* Interrupt enable */
-# define UDC_SOF_IE (1 << 7)
-# define UDC_EPN_RX_IE (1 << 5)
-# define UDC_EPN_TX_IE (1 << 4)
-# define UDC_DS_CHG_IE (1 << 3)
-# define UDC_EP0_IE (1 << 0)
-#define UDC_DMA_IRQ_EN (UDC_BASE + 0x2C) /* DMA irq enable */
- /* rx/tx dma channels numbered 1-3 not 0-2 */
-# define UDC_TX_DONE_IE(n) (1 << (4 * (n) - 2))
-# define UDC_RX_CNT_IE(n) (1 << (4 * (n) - 3))
-# define UDC_RX_EOT_IE(n) (1 << (4 * (n) - 4))
-#define UDC_IRQ_SRC (UDC_BASE + 0x30) /* Interrupt source */
-# define UDC_TXN_DONE (1 << 10)
-# define UDC_RXN_CNT (1 << 9)
-# define UDC_RXN_EOT (1 << 8)
-# define UDC_IRQ_SOF (1 << 7)
-# define UDC_EPN_RX (1 << 5)
-# define UDC_EPN_TX (1 << 4)
-# define UDC_DS_CHG (1 << 3)
-# define UDC_SETUP (1 << 2)
-# define UDC_EP0_RX (1 << 1)
-# define UDC_EP0_TX (1 << 0)
-# define UDC_IRQ_SRC_MASK 0x7bf
-#define UDC_EPN_STAT (UDC_BASE + 0x34) /* EP irq status */
-#define UDC_DMAN_STAT (UDC_BASE + 0x38) /* DMA irq status */
-# define UDC_DMA_RX_SB (1 << 12)
-# define UDC_DMA_RX_SRC(x) (((x)>>8) & 0xf)
-# define UDC_DMA_TX_SRC(x) (((x)>>0) & 0xf)
-
-
-/* DMA configuration registers: up to three channels in each direction. */
-#define UDC_RXDMA_CFG (UDC_BASE + 0x40) /* 3 eps for RX DMA */
-# define UDC_DMA_REQ (1 << 12)
-#define UDC_TXDMA_CFG (UDC_BASE + 0x44) /* 3 eps for TX DMA */
-#define UDC_DATA_DMA (UDC_BASE + 0x48) /* rx/tx fifo addr */
-
-/* rx/tx dma control, numbering channels 1-3 not 0-2 */
-#define UDC_TXDMA(chan) (UDC_BASE + 0x50 - 4 + 4 * (chan))
-# define UDC_TXN_EOT (1 << 15) /* bytes vs packets */
-# define UDC_TXN_START (1 << 14) /* start transfer */
-# define UDC_TXN_TSC 0x03ff /* units in xfer */
-#define UDC_RXDMA(chan) (UDC_BASE + 0x60 - 4 + 4 * (chan))
-# define UDC_RXN_STOP (1 << 15) /* enable EOT irq */
-# define UDC_RXN_TC 0x00ff /* packets in xfer */
-
-
-/*
- * Endpoint configuration registers (used before CFG_LOCK is set)
- * UDC_EP_TX(0) is unused
- */
-#define UDC_EP_RX(endpoint) (UDC_BASE + 0x80 + (endpoint)*4)
-# define UDC_EPN_RX_VALID (1 << 15)
-# define UDC_EPN_RX_DB (1 << 14)
- /* buffer size in bits 13, 12 */
-# define UDC_EPN_RX_ISO (1 << 11)
- /* buffer pointer in low 11 bits */
-#define UDC_EP_TX(endpoint) (UDC_BASE + 0xc0 + (endpoint)*4)
- /* same bitfields as in RX */
-
-/*-------------------------------------------------------------------------*/
-
-struct omap_req {
- struct usb_request req;
- struct list_head queue;
- unsigned dma_bytes;
- unsigned mapped:1;
-};
-
-struct omap_ep {
- struct usb_ep ep;
- struct list_head queue;
- unsigned long irqs;
- struct list_head iso;
- char name[14];
- u16 maxpacket;
- u8 bEndpointAddress;
- u8 bmAttributes;
- unsigned double_buf:1;
- unsigned stopped:1;
- unsigned fnf:1;
- unsigned has_dma:1;
- u8 ackwait;
- u8 dma_channel;
- u16 dma_counter;
- int lch;
- struct omap_udc *udc;
- struct timer_list timer;
-};
-
-struct omap_udc {
- struct usb_gadget gadget;
- struct usb_gadget_driver *driver;
- spinlock_t lock;
- struct omap_ep ep[32];
- u16 devstat;
- u16 clr_halt;
- struct usb_phy *transceiver;
- struct list_head iso;
- unsigned softconnect:1;
- unsigned vbus_active:1;
- unsigned ep0_pending:1;
- unsigned ep0_in:1;
- unsigned ep0_set_config:1;
- unsigned ep0_reset_config:1;
- unsigned ep0_setup:1;
- struct completion *done;
- struct clk *dc_clk;
- struct clk *hhc_clk;
- unsigned clk_requested:1;
-};
-
-/*-------------------------------------------------------------------------*/
-
-#ifdef VERBOSE
-# define VDBG DBG
-#else
-# define VDBG(stuff...) do{}while(0)
-#endif
-
-#define ERR(stuff...) pr_err("udc: " stuff)
-#define WARNING(stuff...) pr_warn("udc: " stuff)
-#define INFO(stuff...) pr_info("udc: " stuff)
-#define DBG(stuff...) pr_debug("udc: " stuff)
-
-/*-------------------------------------------------------------------------*/
-
-/* MOD_CONF_CTRL_0 */
-#define VBUS_W2FC_1510 (1 << 17) /* 0 gpio0, 1 dvdd2 pin */
-
-/* FUNC_MUX_CTRL_0 */
-#define VBUS_CTRL_1510 (1 << 19) /* 1 connected (software) */
-#define VBUS_MODE_1510 (1 << 18) /* 0 hardware, 1 software */
-
-#define HMC_1510 ((omap_readl(MOD_CONF_CTRL_0) >> 1) & 0x3f)
-#define HMC_1610 (omap_readl(OTG_SYSCON_2) & 0x3f)
-#define HMC (cpu_is_omap15xx() ? HMC_1510 : HMC_1610)
-
diff --git a/drivers/usb/host/Kconfig b/drivers/usb/host/Kconfig
index e0329a08f612..11d028860345 100644
--- a/drivers/usb/host/Kconfig
+++ b/drivers/usb/host/Kconfig
@@ -406,14 +406,6 @@ config USB_OHCI_HCD
if USB_OHCI_HCD
-config USB_OHCI_HCD_OMAP1
- tristate "OHCI support for OMAP1/2 chips"
- depends on ARCH_OMAP1
- depends on ISP1301_OMAP
- default y
- help
- Enables support for the OHCI controller on OMAP1/2 chips.
-
config USB_OHCI_HCD_SPEAR
tristate "Support for ST SPEAr on-chip OHCI USB controller"
depends on USB_OHCI_HCD && (PLAT_SPEAR || COMPILE_TEST)
diff --git a/drivers/usb/host/Makefile b/drivers/usb/host/Makefile
index 6d8ee264c9b2..76c588d6c560 100644
--- a/drivers/usb/host/Makefile
+++ b/drivers/usb/host/Makefile
@@ -55,7 +55,6 @@ obj-$(CONFIG_USB_OHCI_HCD) += ohci-hcd.o
obj-$(CONFIG_USB_OHCI_HCD_PCI) += ohci-pci.o
obj-$(CONFIG_USB_OHCI_HCD_PLATFORM) += ohci-platform.o
obj-$(CONFIG_USB_OHCI_EXYNOS) += ohci-exynos.o
-obj-$(CONFIG_USB_OHCI_HCD_OMAP1) += ohci-omap.o
obj-$(CONFIG_USB_OHCI_HCD_SPEAR) += ohci-spear.o
obj-$(CONFIG_USB_OHCI_HCD_STI) += ohci-st.o
obj-$(CONFIG_USB_OHCI_HCD_AT91) += ohci-at91.o
diff --git a/drivers/usb/host/ohci-omap.c b/drivers/usb/host/ohci-omap.c
deleted file mode 100644
index d7f594db56c6..000000000000
--- a/drivers/usb/host/ohci-omap.c
+++ /dev/null
@@ -1,435 +0,0 @@
-// SPDX-License-Identifier: GPL-1.0+
-/*
- * OHCI HCD (Host Controller Driver) for USB.
- *
- * (C) Copyright 1999 Roman Weissgaerber <[email protected]>
- * (C) Copyright 2000-2005 David Brownell
- * (C) Copyright 2002 Hewlett-Packard Company
- *
- * OMAP Bus Glue
- *
- * Modified for OMAP by Tony Lindgren <[email protected]>
- * Based on the 2.4 OMAP OHCI driver originally done by MontaVista Software Inc.
- * and on ohci-sa1111.c by Christopher Hoover <[email protected]>
- *
- * This file is licenced under the GPL.
- */
-
-#include <linux/clk.h>
-#include <linux/dma-mapping.h>
-#include <linux/err.h>
-#include <linux/gpio/consumer.h>
-#include <linux/io.h>
-#include <linux/jiffies.h>
-#include <linux/kernel.h>
-#include <linux/module.h>
-#include <linux/usb/otg.h>
-#include <linux/platform_device.h>
-#include <linux/platform_data/usb-omap1.h>
-#include <linux/soc/ti/omap1-usb.h>
-#include <linux/soc/ti/omap1-mux.h>
-#include <linux/soc/ti/omap1-soc.h>
-#include <linux/soc/ti/omap1-io.h>
-#include <linux/signal.h>
-#include <linux/usb.h>
-#include <linux/usb/hcd.h>
-
-#include "ohci.h"
-
-#include <asm/io.h>
-#include <asm/mach-types.h>
-
-#define DRIVER_DESC "OHCI OMAP driver"
-
-struct ohci_omap_priv {
- struct clk *usb_host_ck;
- struct clk *usb_dc_ck;
- struct gpio_desc *power;
- struct gpio_desc *overcurrent;
-};
-
-static const char hcd_name[] = "ohci-omap";
-static struct hc_driver __read_mostly ohci_omap_hc_driver;
-
-#define hcd_to_ohci_omap_priv(h) \
- ((struct ohci_omap_priv *)hcd_to_ohci(h)->priv)
-
-static void omap_ohci_clock_power(struct ohci_omap_priv *priv, int on)
-{
- if (on) {
- clk_enable(priv->usb_dc_ck);
- clk_enable(priv->usb_host_ck);
- /* guesstimate for T5 == 1x 32K clock + APLL lock time */
- udelay(100);
- } else {
- clk_disable(priv->usb_host_ck);
- clk_disable(priv->usb_dc_ck);
- }
-}
-
-#ifdef CONFIG_USB_OTG
-
-static void start_hnp(struct ohci_hcd *ohci)
-{
- struct usb_hcd *hcd = ohci_to_hcd(ohci);
- const unsigned port = hcd->self.otg_port - 1;
- unsigned long flags;
- u32 l;
-
- otg_start_hnp(hcd->usb_phy->otg);
-
- local_irq_save(flags);
- hcd->usb_phy->otg->state = OTG_STATE_A_SUSPEND;
- writel (RH_PS_PSS, &ohci->regs->roothub.portstatus [port]);
- l = omap_readl(OTG_CTRL);
- l &= ~OTG_A_BUSREQ;
- omap_writel(l, OTG_CTRL);
- local_irq_restore(flags);
-}
-
-#endif
-
-/*-------------------------------------------------------------------------*/
-
-static int ohci_omap_reset(struct usb_hcd *hcd)
-{
- struct ohci_hcd *ohci = hcd_to_ohci(hcd);
- struct omap_usb_config *config = dev_get_platdata(hcd->self.controller);
- struct ohci_omap_priv *priv = hcd_to_ohci_omap_priv(hcd);
- int need_transceiver = (config->otg != 0);
- int ret;
-
- dev_dbg(hcd->self.controller, "starting USB Controller\n");
-
- if (config->otg) {
- hcd->self.otg_port = config->otg;
- /* default/minimum OTG power budget: 8 mA */
- hcd->power_budget = 8;
- }
-
- /* XXX OMAP16xx only */
- if (config->ocpi_enable)
- config->ocpi_enable();
-
-#ifdef CONFIG_USB_OTG
- if (need_transceiver) {
- hcd->usb_phy = usb_get_phy(USB_PHY_TYPE_USB2);
- if (!IS_ERR_OR_NULL(hcd->usb_phy)) {
- int status = otg_set_host(hcd->usb_phy->otg,
- &ohci_to_hcd(ohci)->self);
- dev_dbg(hcd->self.controller, "init %s phy, status %d\n",
- hcd->usb_phy->label, status);
- if (status) {
- usb_put_phy(hcd->usb_phy);
- return status;
- }
- } else {
- return -EPROBE_DEFER;
- }
- hcd->skip_phy_initialization = 1;
- ohci->start_hnp = start_hnp;
- }
-#endif
-
- omap_ohci_clock_power(priv, 1);
-
- if (config->lb_reset)
- config->lb_reset();
-
- ret = ohci_setup(hcd);
- if (ret < 0)
- return ret;
-
- if (config->otg || config->rwc) {
- ohci->hc_control = OHCI_CTRL_RWC;
- writel(OHCI_CTRL_RWC, &ohci->regs->control);
- }
-
- /* board-specific power switching and overcurrent support */
- if (machine_is_omap_osk()) {
- u32 rh = roothub_a (ohci);
-
- /* power switching (ganged by default) */
- rh &= ~RH_A_NPS;
-
- /* TPS2045 switch for internal transceiver (port 1) */
- if (machine_is_omap_osk()) {
- ohci_to_hcd(ohci)->power_budget = 250;
-
- rh &= ~RH_A_NOCP;
-
- /* gpio9 for overcurrent detction */
- omap_cfg_reg(W8_1610_GPIO9);
-
- /* for paranoia's sake: disable USB.PUEN */
- omap_cfg_reg(W4_USB_HIGHZ);
- }
- ohci_writel(ohci, rh, &ohci->regs->roothub.a);
- ohci->flags &= ~OHCI_QUIRK_HUB_POWER;
- } else if (machine_is_nokia770()) {
- /* We require a self-powered hub, which should have
- * plenty of power. */
- ohci_to_hcd(ohci)->power_budget = 0;
- }
-
- /* FIXME hub_wq hub requests should manage power switching */
- if (config->transceiver_power)
- return config->transceiver_power(1);
-
- if (priv->power)
- gpiod_set_value_cansleep(priv->power, 0);
-
- /* board init will have already handled HMC and mux setup.
- * any external transceiver should already be initialized
- * too, so all configured ports use the right signaling now.
- */
-
- return 0;
-}
-
-/*-------------------------------------------------------------------------*/
-
-/**
- * ohci_hcd_omap_probe - initialize OMAP-based HCDs
- * @pdev: USB controller to probe
- *
- * Context: task context, might sleep
- *
- * Allocates basic resources for this USB host controller, and
- * then invokes the start() method for the HCD associated with it
- * through the hotplug entry's driver_data.
- */
-static int ohci_hcd_omap_probe(struct platform_device *pdev)
-{
- int retval, irq;
- struct usb_hcd *hcd = 0;
- struct ohci_omap_priv *priv;
-
- if (pdev->num_resources != 2) {
- dev_err(&pdev->dev, "invalid num_resources: %i\n",
- pdev->num_resources);
- return -ENODEV;
- }
-
- if (pdev->resource[0].flags != IORESOURCE_MEM
- || pdev->resource[1].flags != IORESOURCE_IRQ) {
- dev_err(&pdev->dev, "invalid resource type\n");
- return -ENODEV;
- }
-
- hcd = usb_create_hcd(&ohci_omap_hc_driver, &pdev->dev,
- dev_name(&pdev->dev));
- if (!hcd)
- return -ENOMEM;
-
- hcd->rsrc_start = pdev->resource[0].start;
- hcd->rsrc_len = pdev->resource[0].end - pdev->resource[0].start + 1;
- priv = hcd_to_ohci_omap_priv(hcd);
-
- /* Obtain two optional GPIO lines */
- priv->power = devm_gpiod_get_optional(&pdev->dev, "power", GPIOD_ASIS);
- if (IS_ERR(priv->power)) {
- retval = PTR_ERR(priv->power);
- goto err_put_hcd;
- }
- if (priv->power)
- gpiod_set_consumer_name(priv->power, "OHCI power");
-
- /*
- * This "overcurrent" GPIO line isn't really used in the code,
- * but has a designated hardware function.
- * TODO: implement proper overcurrent handling.
- */
- priv->overcurrent = devm_gpiod_get_optional(&pdev->dev, "overcurrent",
- GPIOD_IN);
- if (IS_ERR(priv->overcurrent)) {
- retval = PTR_ERR(priv->overcurrent);
- goto err_put_hcd;
- }
- if (priv->overcurrent)
- gpiod_set_consumer_name(priv->overcurrent, "OHCI overcurrent");
-
- priv->usb_host_ck = clk_get(&pdev->dev, "usb_hhc_ck");
- if (IS_ERR(priv->usb_host_ck)) {
- retval = PTR_ERR(priv->usb_host_ck);
- goto err_put_hcd;
- }
-
- retval = clk_prepare(priv->usb_host_ck);
- if (retval)
- goto err_put_host_ck;
-
- if (!cpu_is_omap15xx())
- priv->usb_dc_ck = clk_get(&pdev->dev, "usb_dc_ck");
- else
- priv->usb_dc_ck = clk_get(&pdev->dev, "lb_ck");
-
- if (IS_ERR(priv->usb_dc_ck)) {
- retval = PTR_ERR(priv->usb_dc_ck);
- goto err_unprepare_host_ck;
- }
-
- retval = clk_prepare(priv->usb_dc_ck);
- if (retval)
- goto err_put_dc_ck;
-
- if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len, hcd_name)) {
- dev_dbg(&pdev->dev, "request_mem_region failed\n");
- retval = -EBUSY;
- goto err_unprepare_dc_ck;
- }
-
- hcd->regs = ioremap(hcd->rsrc_start, hcd->rsrc_len);
- if (!hcd->regs) {
- dev_err(&pdev->dev, "can't ioremap OHCI HCD\n");
- retval = -ENOMEM;
- goto err2;
- }
-
- irq = platform_get_irq(pdev, 0);
- if (irq < 0) {
- retval = irq;
- goto err3;
- }
- retval = usb_add_hcd(hcd, irq, 0);
- if (retval)
- goto err3;
-
- device_wakeup_enable(hcd->self.controller);
- return 0;
-err3:
- iounmap(hcd->regs);
-err2:
- release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
-err_unprepare_dc_ck:
- clk_unprepare(priv->usb_dc_ck);
-err_put_dc_ck:
- clk_put(priv->usb_dc_ck);
-err_unprepare_host_ck:
- clk_unprepare(priv->usb_host_ck);
-err_put_host_ck:
- clk_put(priv->usb_host_ck);
-err_put_hcd:
- usb_put_hcd(hcd);
- return retval;
-}
-
-
-/* may be called with controller, bus, and devices active */
-
-/**
- * ohci_hcd_omap_remove - shutdown processing for OMAP-based HCDs
- * @pdev: USB Host Controller being removed
- *
- * Context: task context, might sleep
- *
- * Reverses the effect of ohci_hcd_omap_probe(), first invoking
- * the HCD's stop() method. It is always called from a thread
- * context, normally "rmmod", "apmd", or something similar.
- */
-static int ohci_hcd_omap_remove(struct platform_device *pdev)
-{
- struct usb_hcd *hcd = platform_get_drvdata(pdev);
- struct ohci_omap_priv *priv = hcd_to_ohci_omap_priv(hcd);
-
- dev_dbg(hcd->self.controller, "stopping USB Controller\n");
- usb_remove_hcd(hcd);
- omap_ohci_clock_power(priv, 0);
- if (!IS_ERR_OR_NULL(hcd->usb_phy)) {
- (void) otg_set_host(hcd->usb_phy->otg, 0);
- usb_put_phy(hcd->usb_phy);
- }
- iounmap(hcd->regs);
- release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
- clk_unprepare(priv->usb_dc_ck);
- clk_put(priv->usb_dc_ck);
- clk_unprepare(priv->usb_host_ck);
- clk_put(priv->usb_host_ck);
- usb_put_hcd(hcd);
- return 0;
-}
-
-/*-------------------------------------------------------------------------*/
-
-#ifdef CONFIG_PM
-
-static int ohci_omap_suspend(struct platform_device *pdev, pm_message_t message)
-{
- struct usb_hcd *hcd = platform_get_drvdata(pdev);
- struct ohci_hcd *ohci = hcd_to_ohci(hcd);
- struct ohci_omap_priv *priv = hcd_to_ohci_omap_priv(hcd);
- bool do_wakeup = device_may_wakeup(&pdev->dev);
- int ret;
-
- if (time_before(jiffies, ohci->next_statechange))
- msleep(5);
- ohci->next_statechange = jiffies;
-
- ret = ohci_suspend(hcd, do_wakeup);
- if (ret)
- return ret;
-
- omap_ohci_clock_power(priv, 0);
- return ret;
-}
-
-static int ohci_omap_resume(struct platform_device *dev)
-{
- struct usb_hcd *hcd = platform_get_drvdata(dev);
- struct ohci_hcd *ohci = hcd_to_ohci(hcd);
- struct ohci_omap_priv *priv = hcd_to_ohci_omap_priv(hcd);
-
- if (time_before(jiffies, ohci->next_statechange))
- msleep(5);
- ohci->next_statechange = jiffies;
-
- omap_ohci_clock_power(priv, 1);
- ohci_resume(hcd, false);
- return 0;
-}
-
-#endif
-
-/*-------------------------------------------------------------------------*/
-
-/*
- * Driver definition to register with the OMAP bus
- */
-static struct platform_driver ohci_hcd_omap_driver = {
- .probe = ohci_hcd_omap_probe,
- .remove = ohci_hcd_omap_remove,
- .shutdown = usb_hcd_platform_shutdown,
-#ifdef CONFIG_PM
- .suspend = ohci_omap_suspend,
- .resume = ohci_omap_resume,
-#endif
- .driver = {
- .name = "ohci",
- },
-};
-
-static const struct ohci_driver_overrides omap_overrides __initconst = {
- .product_desc = "OMAP OHCI",
- .reset = ohci_omap_reset,
- .extra_priv_size = sizeof(struct ohci_omap_priv),
-};
-
-static int __init ohci_omap_init(void)
-{
- if (usb_disabled())
- return -ENODEV;
-
- ohci_init_driver(&ohci_omap_hc_driver, &omap_overrides);
- return platform_driver_register(&ohci_hcd_omap_driver);
-}
-module_init(ohci_omap_init);
-
-static void __exit ohci_omap_cleanup(void)
-{
- platform_driver_unregister(&ohci_hcd_omap_driver);
-}
-module_exit(ohci_omap_cleanup);
-
-MODULE_DESCRIPTION(DRIVER_DESC);
-MODULE_ALIAS("platform:ohci");
-MODULE_LICENSE("GPL");
diff --git a/include/linux/omap-dma.h b/include/linux/omap-dma.h
index 6f6c31e3fb93..d47703cc3022 100644
--- a/include/linux/omap-dma.h
+++ b/include/linux/omap-dma.h
@@ -306,34 +306,6 @@ extern int omap_request_dma(int dev_id, const char *dev_name,
void (*callback)(int lch, u16 ch_status, void *data),
void *data, int *dma_ch);
extern void omap_free_dma(int ch);
-#if IS_ENABLED(CONFIG_USB_OMAP)
-extern void omap_disable_dma_irq(int ch, u16 irq_bits);
-extern void omap_start_dma(int lch);
-extern void omap_stop_dma(int lch);
-extern void omap_set_dma_transfer_params(int lch, int data_type,
- int elem_count, int frame_count,
- int sync_mode,
- int dma_trigger, int src_or_dst_synch);
-extern void omap_set_dma_channel_mode(int lch, enum omap_dma_channel_mode mode);
-
-extern void omap_set_dma_src_params(int lch, int src_port, int src_amode,
- unsigned long src_start,
- int src_ei, int src_fi);
-extern void omap_set_dma_src_data_pack(int lch, int enable);
-extern void omap_set_dma_src_burst_mode(int lch,
- enum omap_dma_burst_mode burst_mode);
-
-extern void omap_set_dma_dest_params(int lch, int dest_port, int dest_amode,
- unsigned long dest_start,
- int dst_ei, int dst_fi);
-extern void omap_set_dma_dest_data_pack(int lch, int enable);
-extern void omap_set_dma_dest_burst_mode(int lch,
- enum omap_dma_burst_mode burst_mode);
-
-extern dma_addr_t omap_get_dma_src_pos(int lch);
-extern dma_addr_t omap_get_dma_dst_pos(int lch);
-extern int omap_get_dma_active_status(int lch);
-#endif
extern int omap_dma_running(void);
--
2.17.1
On Thu, Jan 12, 2023, at 09:37, Lukas Bulwahn wrote:
> Commit 0fee2eac5c2b ("usb: phy: remove phy-isp1301-omap driver") removes
> the Philips ISP1301 with OMAP OTG driver and its corresponding config
> ISP1301_OMAP. The drivers, OMAP USB Device Controller and OHCI support for
> OMAP1/2 chips, with corresponding configs, USB_OMAP and USB_OHCI_HCD_OMAP1,
> need this removed driver (see "depends on ISP1301_OMAP") to build.
>
> Remove those two drivers.
>
> With the config USB_OMAP removed in this commit, remove some further code
> in the omap-dma header and mach-omap1 architecture code.
>
> Signed-off-by: Lukas Bulwahn <[email protected]>
This would be a great cleanup because of the simplications of the
omap-dma code. I had previously looked at it and concluded that
the driver is still in use though, and I think my mistake was
just in the Kconfig part of this patch:
commit c32fd10914a314dd96c5d24030200070c84df5f1
Author: Arnd Bergmann <[email protected]>
Date: Thu Sep 29 15:38:56 2022 +0200
ARM: omap1: remove unused board files
All board support that was marked as 'unused' earlier can
now be removed, leaving the five machines that that still
had someone using them in 2022, or that are supported in
qemu.
Cc: Aaro Koskinen <[email protected]>
Cc: Janusz Krzysztofik <[email protected]>
Cc: Tony Lindgren <[email protected]>
Cc: [email protected]
Signed-off-by: Arnd Bergmann <[email protected]>
diff --git a/drivers/usb/gadget/udc/Kconfig b/drivers/usb/gadget/udc/Kconfig
index b3006d8b04ab..95751062078e 100644
--- a/drivers/usb/gadget/udc/Kconfig
+++ b/drivers/usb/gadget/udc/Kconfig
@@ -118,7 +118,7 @@ config USB_GR_UDC
config USB_OMAP
tristate "OMAP USB Device Controller"
depends on ARCH_OMAP1
- depends on ISP1301_OMAP || !(MACH_OMAP_H2 || MACH_OMAP_H3)
+ depends on ISP1301_OMAP
help
Many Texas Instruments OMAP processors have flexible full
speed USB device controllers, with support for up to 30
diff --git a/drivers/usb/host/Kconfig b/drivers/usb/host/Kconfig
index 0442dc4bc334..a0c14c62ff32 100644
--- a/drivers/usb/host/Kconfig
+++ b/drivers/usb/host/Kconfig
@@ -409,7 +409,7 @@ if USB_OHCI_HCD
config USB_OHCI_HCD_OMAP1
tristate "OHCI support for OMAP1/2 chips"
depends on ARCH_OMAP1
- depends on ISP1301_OMAP || !(MACH_OMAP_H2 || MACH_OMAP_H3)
+ depends on ISP1301_OMAP
default y
help
Enables support for the OHCI controller on OMAP1/2 chips.
Instead of changing this to 'depends on ISP1301_OMAP', the line
probably should just be dropped entirely.
Arnd
On Thu, Jan 12, 2023 at 10:03 AM Arnd Bergmann <[email protected]> wrote:
>
> On Thu, Jan 12, 2023, at 09:37, Lukas Bulwahn wrote:
> > Commit 0fee2eac5c2b ("usb: phy: remove phy-isp1301-omap driver") removes
> > the Philips ISP1301 with OMAP OTG driver and its corresponding config
> > ISP1301_OMAP. The drivers, OMAP USB Device Controller and OHCI support for
> > OMAP1/2 chips, with corresponding configs, USB_OMAP and USB_OHCI_HCD_OMAP1,
> > need this removed driver (see "depends on ISP1301_OMAP") to build.
> >
> > Remove those two drivers.
> >
> > With the config USB_OMAP removed in this commit, remove some further code
> > in the omap-dma header and mach-omap1 architecture code.
> >
> > Signed-off-by: Lukas Bulwahn <[email protected]>
>
> This would be a great cleanup because of the simplications of the
> omap-dma code. I had previously looked at it and concluded that
> the driver is still in use though, and I think my mistake was
> just in the Kconfig part of this patch:
>
> commit c32fd10914a314dd96c5d24030200070c84df5f1
> Author: Arnd Bergmann <[email protected]>
> Date: Thu Sep 29 15:38:56 2022 +0200
>
> ARM: omap1: remove unused board files
>
> All board support that was marked as 'unused' earlier can
> now be removed, leaving the five machines that that still
> had someone using them in 2022, or that are supported in
> qemu.
>
> Cc: Aaro Koskinen <[email protected]>
> Cc: Janusz Krzysztofik <[email protected]>
> Cc: Tony Lindgren <[email protected]>
> Cc: [email protected]
> Signed-off-by: Arnd Bergmann <[email protected]>
>
> diff --git a/drivers/usb/gadget/udc/Kconfig b/drivers/usb/gadget/udc/Kconfig
> index b3006d8b04ab..95751062078e 100644
> --- a/drivers/usb/gadget/udc/Kconfig
> +++ b/drivers/usb/gadget/udc/Kconfig
> @@ -118,7 +118,7 @@ config USB_GR_UDC
> config USB_OMAP
> tristate "OMAP USB Device Controller"
> depends on ARCH_OMAP1
> - depends on ISP1301_OMAP || !(MACH_OMAP_H2 || MACH_OMAP_H3)
> + depends on ISP1301_OMAP
> help
> Many Texas Instruments OMAP processors have flexible full
> speed USB device controllers, with support for up to 30
> diff --git a/drivers/usb/host/Kconfig b/drivers/usb/host/Kconfig
> index 0442dc4bc334..a0c14c62ff32 100644
> --- a/drivers/usb/host/Kconfig
> +++ b/drivers/usb/host/Kconfig
> @@ -409,7 +409,7 @@ if USB_OHCI_HCD
> config USB_OHCI_HCD_OMAP1
> tristate "OHCI support for OMAP1/2 chips"
> depends on ARCH_OMAP1
> - depends on ISP1301_OMAP || !(MACH_OMAP_H2 || MACH_OMAP_H3)
> + depends on ISP1301_OMAP
> default y
> help
> Enables support for the OHCI controller on OMAP1/2 chips.
>
> Instead of changing this to 'depends on ISP1301_OMAP', the line
> probably should just be dropped entirely.
>
I see. Yes, probably, !(MACH_OMAP_H2 || MACH_OMAP_H3) is really in the
current state of the repository "always true", and hence this
dependency "depends on ISP1301_OMAP || !(MACH_OMAP_H2 ||
MACH_OMAP_H3)" is always independent of ISP1301_OMAP.
Are you going to fix up your commit "ARM: omap1: remove unused board
files" with this change?
Please ignore this patch then; patch 1 and 4 still seem good to pick, though.
Lukas
* Arnd Bergmann <[email protected]> [230112 09:03]:
> On Thu, Jan 12, 2023, at 09:37, Lukas Bulwahn wrote:
> > Commit 0fee2eac5c2b ("usb: phy: remove phy-isp1301-omap driver") removes
> > the Philips ISP1301 with OMAP OTG driver and its corresponding config
> > ISP1301_OMAP. The drivers, OMAP USB Device Controller and OHCI support for
> > OMAP1/2 chips, with corresponding configs, USB_OMAP and USB_OHCI_HCD_OMAP1,
> > need this removed driver (see "depends on ISP1301_OMAP") to build.
> >
> > Remove those two drivers.
> >
> > With the config USB_OMAP removed in this commit, remove some further code
> > in the omap-dma header and mach-omap1 architecture code.
> >
> > Signed-off-by: Lukas Bulwahn <[email protected]>
>
> This would be a great cleanup because of the simplications of the
> omap-dma code. I had previously looked at it and concluded that
> the driver is still in use though, and I think my mistake was
> just in the Kconfig part of this patch:
It sure would be nice to drop the old custom dma api in omap-dma.c
while keeping the dma.c in arch/arm/mach-omap1.
Regards,
Tony
On Thu, Jan 12, 2023, at 10:19, Lukas Bulwahn wrote:
> On Thu, Jan 12, 2023 at 10:03 AM Arnd Bergmann <[email protected]> wrote:
>
> I see. Yes, probably, !(MACH_OMAP_H2 || MACH_OMAP_H3) is really in the
> current state of the repository "always true", and hence this
> dependency "depends on ISP1301_OMAP || !(MACH_OMAP_H2 ||
> MACH_OMAP_H3)" is always independent of ISP1301_OMAP.
>
> Are you going to fix up your commit "ARM: omap1: remove unused board
> files" with this change?
>
> Please ignore this patch then; patch 1 and 4 still seem good to pick, though.
Done, I've applied those two and fixed up the other patch.
Thanks a lot for your series!
Arnd
On Thu, Jan 12, 2023, at 10:53, Tony Lindgren wrote:
> * Arnd Bergmann <[email protected]> [230112 09:03]:
>> On Thu, Jan 12, 2023, at 09:37, Lukas Bulwahn wrote:
>> > Commit 0fee2eac5c2b ("usb: phy: remove phy-isp1301-omap driver") removes
>> > the Philips ISP1301 with OMAP OTG driver and its corresponding config
>> > ISP1301_OMAP. The drivers, OMAP USB Device Controller and OHCI support for
>> > OMAP1/2 chips, with corresponding configs, USB_OMAP and USB_OHCI_HCD_OMAP1,
>> > need this removed driver (see "depends on ISP1301_OMAP") to build.
>> >
>> > Remove those two drivers.
>> >
>> > With the config USB_OMAP removed in this commit, remove some further code
>> > in the omap-dma header and mach-omap1 architecture code.
>> >
>> > Signed-off-by: Lukas Bulwahn <[email protected]>
>>
>> This would be a great cleanup because of the simplications of the
>> omap-dma code. I had previously looked at it and concluded that
>> the driver is still in use though, and I think my mistake was
>> just in the Kconfig part of this patch:
>
> It sure would be nice to drop the old custom dma api in omap-dma.c
> while keeping the dma.c in arch/arm/mach-omap1.
I see that four out of the five remaining board files still use
omap_udc, which is the only remaining user of the custom
DMA interface. What I had not noticed earlier is that DMA support
in that driver is actually optional, though it's hardwired
to be enabled.
So if we want to kill off the old DMA stuff there is actually
a choice between either making omap_udc PIO-only or converting
it to use the standard dmaengine interface.
Arnd
On Thu, Jan 12, 2023, at 15:05, Aaro Koskinen wrote:
> On Thu, Jan 12, 2023 at 11:19:53AM +0100, Arnd Bergmann wrote:
>> On Thu, Jan 12, 2023, at 10:53, Tony Lindgren wrote:
>>
>> So if we want to kill off the old DMA stuff there is actually
>> a choice between either making omap_udc PIO-only or converting
>> it to use the standard dmaengine interface.
>
> I use this driver on Palm TE and 770, and without it those boards would
> be useless for my use cases. Also DMA doubles the throughput, probably
> also power usage is smaller.
Ok, if the performance is important, converting to dmaengine
is probably best. Do you know if this is just a straightforward
replacement of the function calls, or are there technical reasons
why it's not using the dmaengine interface yet?
Arnd
Hi,
On Thu, Jan 12, 2023 at 11:19:53AM +0100, Arnd Bergmann wrote:
> On Thu, Jan 12, 2023, at 10:53, Tony Lindgren wrote:
> > * Arnd Bergmann <[email protected]> [230112 09:03]:
> >> On Thu, Jan 12, 2023, at 09:37, Lukas Bulwahn wrote:
> >> > Commit 0fee2eac5c2b ("usb: phy: remove phy-isp1301-omap driver") removes
> >> > the Philips ISP1301 with OMAP OTG driver and its corresponding config
> >> > ISP1301_OMAP. The drivers, OMAP USB Device Controller and OHCI support for
> >> > OMAP1/2 chips, with corresponding configs, USB_OMAP and USB_OHCI_HCD_OMAP1,
> >> > need this removed driver (see "depends on ISP1301_OMAP") to build.
> >> >
> >> > Remove those two drivers.
> >> >
> >> > With the config USB_OMAP removed in this commit, remove some further code
> >> > in the omap-dma header and mach-omap1 architecture code.
> >> >
> >> > Signed-off-by: Lukas Bulwahn <[email protected]>
> >>
> >> This would be a great cleanup because of the simplications of the
> >> omap-dma code. I had previously looked at it and concluded that
> >> the driver is still in use though, and I think my mistake was
> >> just in the Kconfig part of this patch:
> >
> > It sure would be nice to drop the old custom dma api in omap-dma.c
> > while keeping the dma.c in arch/arm/mach-omap1.
>
> I see that four out of the five remaining board files still use
> omap_udc, which is the only remaining user of the custom
> DMA interface. What I had not noticed earlier is that DMA support
> in that driver is actually optional, though it's hardwired
> to be enabled.
>
> So if we want to kill off the old DMA stuff there is actually
> a choice between either making omap_udc PIO-only or converting
> it to use the standard dmaengine interface.
I use this driver on Palm TE and 770, and without it those boards would
be useless for my use cases. Also DMA doubles the throughput, probably
also power usage is smaller.
A.
* Arnd Bergmann <[email protected]> [230112 14:31]:
> On Thu, Jan 12, 2023, at 15:05, Aaro Koskinen wrote:
> > On Thu, Jan 12, 2023 at 11:19:53AM +0100, Arnd Bergmann wrote:
> >> On Thu, Jan 12, 2023, at 10:53, Tony Lindgren wrote:
> >>
> >> So if we want to kill off the old DMA stuff there is actually
> >> a choice between either making omap_udc PIO-only or converting
> >> it to use the standard dmaengine interface.
> >
> > I use this driver on Palm TE and 770, and without it those boards would
> > be useless for my use cases. Also DMA doubles the throughput, probably
> > also power usage is smaller.
>
> Ok, if the performance is important, converting to dmaengine
> is probably best. Do you know if this is just a straightforward
> replacement of the function calls, or are there technical reasons
> why it's not using the dmaengine interface yet?
Yes I agree dmaengine is the best solution. Seems like this is the
last driver using the old api that never got updated probably because
it's not used on the newer SoCs.
I don't think there are any technical reasons to not use dmaengine
here.
FYI, the last blocker for dmaengine use was for drivers using
port_window that got added with the drivers/usb/musb/tusb6010_omap.c
dmaengine conversion a few years back.
Regards,
Tony