[PATCH 19/41] ARM: omap: dma: make usb support optional

Arnd Bergmann
2022-04-19T14:29:01Z

Most of the plat-omap/dma.c code is specific to the USB
driver. Hide that code when it is not in use, to make it
clearer which parts are actually still required.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
---
arch/arm/plat-omap/dma.c | 45 +++++++++++++++++-----------------
drivers/usb/gadget/udc/Kconfig | 2 +-
include/linux/omap-dma.h | 5 +++-
3 files changed, 27 insertions(+), 25 deletions(-)

diff --git a/arch/arm/plat-omap/dma.c b/arch/arm/plat-omap/dma.c
index 700ba9b600e7..b7757864d0aa 100644
--- a/arch/arm/plat-omap/dma.c
+++ b/arch/arm/plat-omap/dma.c
@@ -66,7 +66,6 @@ enum { DMA_CHAIN_STARTED, DMA_CHAIN_NOTSTARTED };

static struct omap_system_dma_plat_info *p;
static struct omap_dma_dev_attr *d;
-static void omap_clear_dma(int lch);
static int enable_1510_mode;
static u32 errata;

@@ -90,19 +89,16 @@ static int omap_dma_reserve_channels;
static DEFINE_SPINLOCK(dma_chan_lock);
static struct omap_dma_lch *dma_chan;

-static inline void disable_lnk(int lch);
-static void omap_disable_channel_irq(int lch);
-static inline void omap_enable_channel_irq(int lch);
-
-#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)
+static inline void omap_disable_channel_irq(int lch)
{
- return enable_1510_mode;
+ /* disable channel interrupts */
+ p->dma_write(0, CICR, lch);
+ /* Clear CSR */
+ if (dma_omap1())
+ p->dma_read(CSR, lch);
+ else
+ p->dma_write(OMAP2_DMA_CSR_CLEAR_MASK, CSR, lch);
}
-#else
-#define omap_dma_in_1510_mode() 0
-#endif

#ifdef CONFIG_ARCH_OMAP1
static inline void set_gdma_dev(int req, int dev)
@@ -169,6 +165,17 @@ void omap_set_dma_priority(int lch, int dst_port, int priority)
#endif
EXPORT_SYMBOL(omap_set_dma_priority);

+#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)
@@ -418,17 +425,6 @@ static inline void omap_enable_channel_irq(int lch)
p->dma_write(dma_chan[lch].enabled_irqs, CICR, lch);
}

-static inline void omap_disable_channel_irq(int lch)
-{
- /* disable channel interrupts */
- p->dma_write(0, CICR, lch);
- /* Clear CSR */
- if (dma_omap1())
- p->dma_read(CSR, lch);
- else
- p->dma_write(OMAP2_DMA_CSR_CLEAR_MASK, CSR, lch);
-}
-
void omap_disable_dma_irq(int lch, u16 bits)
{
dma_chan[lch].enabled_irqs &= ~bits;
@@ -473,6 +469,7 @@ static inline void disable_lnk(int lch)
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),
@@ -572,6 +569,7 @@ 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;
@@ -792,6 +790,7 @@ 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)
{
diff --git a/drivers/usb/gadget/udc/Kconfig b/drivers/usb/gadget/udc/Kconfig
index cee934dce4f0..69394dc1cdfb 100644
--- a/drivers/usb/gadget/udc/Kconfig
+++ b/drivers/usb/gadget/udc/Kconfig
@@ -128,7 +128,7 @@ config USB_GR_UDC

config USB_OMAP
tristate "OMAP USB Device Controller"
- depends on ARCH_OMAP1 || (ARCH_OMAP && COMPILE_TEST)
+ depends on ARCH_OMAP1
depends on ISP1301_OMAP || !(MACH_OMAP_H2 || MACH_OMAP_H3)
help
Many Texas Instruments OMAP processors have flexible full
diff --git a/include/linux/omap-dma.h b/include/linux/omap-dma.h
index 5e228428fda1..07fa58ae9902 100644
--- a/include/linux/omap-dma.h
+++ b/include/linux/omap-dma.h
@@ -299,8 +299,9 @@ extern void omap_set_dma_priority(int lch, int dst_port, int priority);
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_disable_dma_irq(int ch, u16 irq_bits);
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,
@@ -326,6 +327,8 @@ extern void omap_set_dma_dest_burst_mode(int lch,
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);

#if IS_ENABLED(CONFIG_FB_OMAP)